JP2003200115A - Glass piece separator, method for recovering glass piece and method for manufacturing plate glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a glass piece separator that is capable of accurately separating foreign material attached glass pieces even if they are fine glass pieces, and that enhances the regeneration and recovery rate of the normal glass pieces by improving the credibility in detecting the foreign material attached glass pieces. <P>SOLUTION: The glass piece separator is provided with a flow passage forming means 6 that forms the flow of glass pieces 1 to be separated, a sensor 8 that detects the foreign material attached glass pieces 9 to be separated and removed from the flow of the glass pieces 1 optically, and a separation means 12 that separates the detected foreign material attached glass pieces 9 from the flow of glass pieces 1. Further, the glass piece separator is provided with a plurality of sensors 8 to detect the equivalent position among the flow of the glass pieces 1 from the different angles. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a glass piece separator for selecting glass pieces for recycling, a method for collecting glass pieces, and a method for manufacturing flat glass.

[0002]

2. Description of the Related Art As a window glass for an automobile rear window or the like, a tempered glass having a tempered compression layer formed on its surface is used. This tempered glass is smaller than ordinary glass when it is crushed with a large impact (2-10 mm).
Crush into pieces with a lot of horns.

The peripheral portion of the rear window is fixed to the vehicle body with an adhesive. In this case, in order to prevent the adhesive from being deteriorated by ultraviolet rays, the peripheral surface of the rear window is usually coated with a dark ceramic paste fired body.

On the other hand, glass materials are recycled by reuse in order to save resources and protect the environment. When recycling a glass plate, the glass plate is crushed and melted to form a new glass plate. In this case, if the crushed glass pieces before melting include glass pieces with foreign matter attached to the surface or mixed in the inside or colored glass pieces (hereinafter referred to as foreign matter-attached glass pieces), the glass plate after regeneration is The quality will deteriorate. Therefore, it is necessary to sort out the foreign matter-attached glass pieces and remove them as much as possible.

As a device for selecting and separating such foreign matter-attached glass pieces, a glass piece separator has been conventionally used. The conventional glass piece separator drops the aggregate (cullet) of glass pieces to be reused from the shooter,
An optical sensor detects a foreign substance-attached glass piece on the shooter or while the glass piece (cullet) is falling. This sensor has a light source behind the cullet,
The light from the light source is detected by the sensor through the cullet,
The light transmittance of each glass piece is used to identify the glass piece with foreign matter attached. When the foreign matter-attached glass piece is detected, the air injection nozzle provided below the foreign matter-attached glass piece is driven in synchronization with the falling time, and the foreign matter-attached glass piece is blown away by compressed air to be removed.

In such a glass piece separator,
When selecting a glass piece coated with dark foreign matter on the surface, if the shape of the glass piece is larger than a certain size, the direction of the glass piece flowing on the shooter will be almost the same, so install the sensor in advance in that direction. The foreign matter-attached glass pieces can be accurately detected by an optical sensor and can be separated and removed with a high sorting rate.

[0007]

However, when the crushed glass pieces become finer (for example, the outer shape is about 2 to 4 mm), the directions of the surfaces thereof are scattered, and the glass pieces which cannot be optically detected by the sensor in a certain direction are generated. Will increase. For this reason, the rate of selective removal of foreign matter-attached glass pieces in the cullet is lowered, and these are melted as they are, which causes deterioration of the quality of the glass plate after being recycled.

Further, when the glass piece becomes thin, the light that should normally be transmitted by the normal glass piece is reflected by the surface reflection, and the normal glass piece may be erroneously detected as a foreign matter-attached glass piece. As a result, identification accuracy and reliability decline,
Normal glass fragments are removed without being recovered, and the recovery rate of regeneration decreases.

Such a problem when the glass pieces become finer becomes a problem because the tempered glass plate is finely and finely crushed when the tempered window glass for automobiles is regenerated, and a countermeasure is desired.

The present invention has been made in view of the above-mentioned prior art, and when a tempered glass having a surface coated with a foreign material such as a fired body of a dark ceramic paste such as a rear window of an automobile is recycled, a fine glass piece is used. Even if there is, it is possible to accurately select and remove foreign matter-attached glass pieces to improve the quality of the glass plate after recycling, and to enhance the reliability of detection of foreign matter-attached glass pieces to improve the recovery rate of normal glass pieces. It is intended to provide a separator, a method for collecting glass pieces, and a method for manufacturing flat glass.

[0011]

In order to achieve the above object, in the present invention, a flow path forming means for forming a flow of glass pieces to be selectively separated, and a foreign substance adhered to be separated and removed from the flow of the glass pieces. In a glass piece separator provided with a sensor for optically detecting a glass piece and a separating means for separating the detected foreign substance-attached glass piece from the flow of the glass piece, a plurality of the sensors are provided, and the flow of the glass piece Provided is a glass piece separator, wherein the same position in the inside is detected by a plurality of sensors from different angles.

Further, in the present invention, as a method of recovering glass pieces, a step of introducing glass pieces to be sorted and separated into a flow path through which the glass pieces flow, and a step of irradiating the glass pieces flowing through the flow path with light to separate them. A detection step of detecting foreign matter-attached glass pieces to be separated, a separation step of separating the detected foreign matter-attached glass pieces from the glass pieces flowing in the flow path, and a glass piece separated from the foreign matter-attached glass pieces in the separation step A method for recovering glass pieces, comprising: a recovering step for recovering, wherein in the detecting step, the glass pieces flowing in the channel should be separated by irradiating light toward the same position from a plurality of directions. Provided is a method for collecting glass fragments, which is characterized by detecting foreign substance-attached glass fragments.

According to this structure, since one glass piece is detected from a plurality of directions, it is possible to detect foreign matter adhering to the surface with high accuracy regardless of the orientation of the glass piece. Therefore, for fine glass pieces that tend to come apart in the cullet, it is possible to accurately detect and separate foreign matter-attached glass pieces, and improve the quality of recycled glass by fine glass pieces such as tempered window glass for automobiles. You can

This point will be described in more detail with reference to FIG. In FIG. 7, 6 is a shooter forming a flow path, and 8 is a shooter.
Is a sensor, and 9 is a foreign substance-attached glass piece to be separated. In particular, a reinforced window glass is a fine glass piece when compared with a normal plate glass that is not subjected to a tempering process when forming a glass side when separating and collecting. When the strengthening treatment is not performed, the size of the glass piece is not fine, and therefore, the orientation of the glass piece in the flow path can be easily made constant as shown in FIG. 7 (a). Therefore, the foreign matter-attached glass piece can be detected by irradiating the light from the direction aligned with the certain direction.

On the other hand, in the glass piece of the glass plate which has been subjected to the strengthening treatment, the orientation of the glass piece in the flow path is not stable as shown in FIG. 7 (b). Therefore, in some cases, the irradiation of light from one direction may fail to detect a glass piece that should be detected as a foreign matter-attached glass piece. Therefore, by irradiating light from a plurality of directions, even if the orientation of the glass piece in the flow path is not stable, it can be detected as a foreign matter-attached glass piece by the light emitted from any of a plurality of directions (Fig. 7 ( See c)).

Further, in order to achieve the above object, in the present invention, a flow path forming means for forming a flow of glass pieces to be selectively separated, and a foreign matter-attached glass piece to be separated and removed from the flow of the glass pieces are optically provided. In the glass piece separator provided with a sensor for detecting, and a separating means for separating the detected foreign substance-attached glass piece from the flow of the glass piece, the flow of the glass piece has a refractive index close to that of glass. There is provided a glass piece separator, which is configured to be formed by mixing the glass piece in a liquid that it has.

Further, in the present invention, as a method of collecting glass pieces, a step of introducing glass pieces to be sorted and separated into a flow path through which the glass pieces flow, and a step of irradiating the glass pieces flowing through the flow path with light to separate them. A detection step of detecting foreign matter-attached glass pieces to be separated, a separation step of separating the detected foreign matter-attached glass pieces from the glass pieces flowing in the flow path, and a glass piece separated from the foreign matter-attached glass pieces in the separation step A method of recovering a glass piece having a recovering step of recovering, in a detecting step, while irradiating light while flowing a liquid having a refractive index close to that of glass together with the glass piece into the flow path. Provided is a method for collecting glass fragments, which is characterized by detecting foreign substance-attached glass fragments to be separated.

According to this structure, the cullet of the glass piece is mixed in a liquid having a refractive index similar to that of glass such as water or ethylene glycol, and the glass piece is detected through the liquid having the near refractive index. It is possible to prevent erroneous detection of the optical sensor due to, improve the reliability of detection, and improve the recovery rate of normal glass fragments. The refractive index that is similar to the refractive index of glass includes the same refractive index as that of glass.

Further, according to the present invention, a flow path forming means for forming a flow of the glass pieces to be selectively separated, a sensor for optically detecting a foreign substance-attached glass piece to be separated and removed from the glass piece flow, and a detection are provided. In the glass piece separator provided with a separating means for separating the foreign matter-attached glass piece from the flow of the glass piece, the separating means comprises a mechanical impact removing device that bounces off the foreign matter-attached glass piece. A glass piece separator is provided.

Further, in the present invention, as a method for collecting glass pieces, a step of introducing glass pieces to be sorted and separated into a flow path through which the glass pieces flow, and a step of irradiating the glass pieces flowing through the flow path with light to separate them. A detection step of detecting foreign matter-attached glass pieces to be separated, a separation step of separating the detected foreign matter-attached glass pieces from the glass pieces flowing in the flow path, and a glass piece separated from the foreign matter-attached glass pieces in the separation step A method of recovering a glass piece having a recovering step of recovering, wherein in the separating step, the foreign substance-attached glass piece detected in the separating step is mechanically bounced off from the glass piece flowing in the flow path. Provided is a method for recovering glass pieces, which is characterized by separating.

According to this structure, a mechanical impact removing device such as a rotary blade or a solenoid type piston is arranged on the downstream side of the optical sensor, and when foreign matter-attached glass fragments are detected in the cullet, the glass fragments are detected. The removing device is driven at a timing determined based on the flow velocity and the distance from the detection position to the removing device, and the blades or pistons are mechanically collided against the foreign matter-attached glass pieces to be bounced off. As a result, the foreign matter-attached glass pieces are separated and removed from the flow of the cullet.

Further, the present invention uses, as a raw material, the glass pieces collected by each of the above-mentioned glass piece collecting methods, and puts the collected glass pieces into a glass melting furnace for plate glass molding to melt them. A method for producing a sheet glass for producing a sheet glass is provided.

According to such a structure, when manufacturing a recycled glass plate from a used glass plate, it is possible to reduce foreign substances mixed in the raw material, and to reduce the number of defects, particularly optical defects such as distortion, of glass plate. Can be manufactured.

In the present invention, in order to separate the glass piece having foreign matter attached and the glass piece having no foreign matter attached, "the foreign matter attached glass piece is detected". On the other hand, by detecting a glass piece having no foreign matter attached and finding a glass piece having no foreign matter attached, it is possible to determine that the glass piece that has not been found is a foreign matter-attached glass piece. Therefore, in the present specification, "detect foreign matter-attached glass fragments"
The term "also detects" a glass piece having no foreign matter attached thereto "so that a certain glass piece can be finally determined to be a foreign matter-attached glass piece.

[0025]

FIG. 1 is a schematic configuration diagram of a glass piece separator according to an embodiment of the present invention. As shown in the drawing, the cullet 1 made of an aggregate of glass pieces to be sorted and separated falls from the vibrating feeder 2 into the funnel 3. From the upper side of the funnel 3, water (or a fluid having a refractive index similar to that of glass such as ethylene glycol) 5 is adjusted by the flow rate adjusting valve 4 and falls into the funnel 3. The cullet 1 drops with the water 5 onto the inclined shooter 6, and the shooter 6
Slide down A diffused light source 7 is attached to the back surface of the shooter 6, and light from the diffused light source 7 is passed through the cullet 1 to detect foreign matter-attached glass pieces 9 by a plurality (two in the figure) of sensors 8. The signal detected by the sensor 8 is transmitted to the control device 10, and the solenoid damper 11 moves the arm 13 having the blade 12 at the tip up and down based on this signal. That is, when the foreign substance-attached glass piece 9 is detected, the blade 12 is pulled up in accordance with the falling time thereof, the foreign substance-attached glass piece 9 hits the blade 12 and is bounced off, and is different from the first container 15 in which a normal glass piece 14 should be placed. It falls into the second container 16.

Thus, by detecting the light transmittance of the cullet on the shooter 6 from two directions, it is possible to detect the foreign substance-attached glass piece 9 with high accuracy. Further, by mixing the cullet 1 in water 5 which is a liquid having a refractive index similar to that of glass, it is possible to prevent erroneous detection of the optical sensor due to surface reflection.

FIG. 2 is a schematic view showing another detecting means of the glass piece separator according to the present invention. Shooter 6 mentioned above
Is made up of a plurality of gutters, and a cullet (not shown) sliding on each gutter is detected by a sensor 8 from a plurality of directions (two directions in the figure). Based on this detection signal, a piston 1 prepared for each gutter according to the falling time of the glass piece with foreign matter attached
7 flicks the foreign substance-attached glass piece into a second container (not shown). A normal piece of glass falls and remains in the first container 15
Housed inside. In this way, by providing a plurality of gutters, it is possible to detect a large number of foreign substance-attached glass pieces evenly and efficiently at the same time, and it is possible to shorten the time required for selection.

FIG. 3 is a schematic view showing still another detecting means of the glass piece separator according to the present invention, and FIG. 4 is a modification of FIG. As shown in FIG. 3, the water 5 containing the cullet flowing down from the funnel 3 is irradiated from three directions by using the three diffused light sources 7, and the light transmittance thereof is detected by each sensor 8. In FIG. 3, all the diffused light sources 7 are set in the direction perpendicular to the flow of the water 5, but as shown in FIG. 4, the diffused light sources 7 are set obliquely upward and the sensor directions are indicated by arrows a, b, and. You may arrange | position so that each may detect from diagonally upward, as shown by c. After detecting the foreign matter-attached glass piece in this manner, the normal glass piece and the foreign matter-attached glass piece are separated by the method shown in FIGS.

FIG. 5 is a schematic view showing a removing device which is a separating means of the glass piece separator according to the present invention. As shown in the drawing, a plurality of blades 19 (four blades in the drawing) each having an inclined bounce-off plane are attached so as to be rotatable about an axis 20 in the arrow direction. The vane 19 stands by in close proximity to the water 5 falling from the funnel. As described above, when the foreign substance-attached glass piece is detected, the blade 19 is rotated by 90 ° in synchronization with the falling timing. As a result, the glass piece with foreign matter attached is splashed with water. At this time, if the blade 19 traverses the water 5 for a long time, glass fragments other than the foreign substance-attached glass fragments are also blown off at the same time, so it is desirable that the rotation speed be as high as possible.

FIG. 6 is a schematic view showing a removing device which is a separating means of the glass piece separator of FIG. In this example, as in FIG. 5, the glass pieces are bounced off by mechanical collision of the blades, and the blade speed is increased.

As shown in the figure, a plurality of (8 in the figure) arms 13 are pivotally supported on a fulcrum 21 on a rotary table 22. A solenoid damper 11 is provided at the inner end of each arm 13 and blades 12 are provided at the outer end. The rotary table constantly rotates at a constant speed, but when no foreign matter-attached glass piece is detected, each blade on the rotary table is in a contracted state, and the glass piece 14 that falls with water from a funnel (not shown) Stand by near the flow. A normal glass piece falls down and enters the first container 15.

When the foreign matter-attached glass piece 9 is detected by the above-mentioned detecting means, the rotary table 2 is synchronized with the falling timing.
2. Pre-drive the corresponding solenoid damper 11 on 2. As a result, the blade 12 of the arm 13 is driven around the fulcrum 21 based on this principle, the blade 12 overhangs to a position that blocks the passage of the glass piece falling with water, and the foreign matter-attached glass piece just falling is rotated on the rotary table 22. Instantly bounce off at an angular velocity of.

[0033]

As described above, in the present invention, since one glass piece is detected from a plurality of directions, it is possible to detect foreign matter adhering to the surface with high accuracy regardless of the orientation of the glass piece. . Therefore, it is possible to accurately detect and remove foreign matter-attached glass pieces for fine glass pieces that tend to fall apart in the cullet, and to improve the quality of recycled glass with fine glass pieces such as tempered window glass for automobiles. Can be improved.

Further, for example, a cullet of a glass piece is mixed in a liquid having a refractive index similar to that of glass such as water or ethylene glycol, and the glass piece is detected through the liquid having a near refractive index. Therefore, an optical sensor using surface reflection is used. It is possible to prevent erroneous detection, improve the reliability of detection, and improve the recovery rate of normal glass fragments.

Further, a mechanical shock removing device such as a rotary vane or a solenoid type piston is arranged on the downstream side of the optical sensor, and when foreign matter-attached glass fragments are detected in the cullet, the flow velocity of the glass fragments is detected. Further, the removing device is driven at a timing determined based on the distance from the detection position to the removing device, and the blade or the piston mechanically collides against the foreign substance-attached glass piece and is bounced off. As a result, a strong splashing force can be obtained, and the foreign substance-attached glass pieces mixed in the liquid such as water can be reliably separated and removed from the flow of the cullet.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a glass piece separator according to an embodiment of the present invention.

FIG. 2 is a schematic view showing another detection means of the glass piece separator according to the present invention.

FIG. 3 is a schematic view showing still another detecting means of the glass piece separator according to the present invention.

FIG. 4 is a schematic diagram showing a modified example of FIG.

FIG. 5 is a schematic view showing a removing device which is a separating means of a glass piece separator according to the present invention.

6 is a schematic view showing a removing device which is a separating means of the glass piece separator of FIG.

FIG. 7 is a conceptual diagram illustrating the detection accuracy of foreign matter-attached glass fragments.

[Explanation of symbols]

1: Cullet, 2: Vibration feeder, 3: Funnel, 4: Flow rate adjusting valve, 5: Water, 6: Shooter, 7: Diffuse light source,
8: Sensor, 9: Glass piece with foreign matter attached, 10: Control device,
11: solenoid damper, 12: blade, 13: arm,
14: Glass piece, 15: First container, 16: Second container, 1
7: piston, 19: blade, 20: shaft, 21: fulcrum, 2
2: Rotary table.

Claims (7)

[Claims] 1. A flow path forming means for forming a flow of glass pieces to be selectively separated, a sensor for optically detecting foreign matter-attached glass pieces to be separated and removed from the flow of the glass pieces, and a detected foreign matter. In a glass piece separator provided with a separating means for separating an adhered glass piece from the flow of the glass piece, a plurality of the sensors are provided, and the same position in the flow of the glass piece is detected by a plurality of sensors from different angles. A glass piece separator characterized in that. 2. A flow path forming means for forming a flow of glass pieces to be selectively separated, a sensor for optically detecting foreign matter-attached glass pieces to be separated and removed from the flow of the glass pieces, and a detected foreign matter. In a glass piece separator provided with a separating means for separating the adhered glass piece from the flow of the glass piece, the flow of the glass piece mixes the glass piece in a liquid having a refractive index close to that of glass. A glass piece separator characterized in that it is configured to be formed by. 3. A flow path forming means for forming a flow of glass pieces to be selectively separated, a sensor for optically detecting foreign matter-attached glass pieces to be separated and removed from the flow of the glass pieces, and a detected foreign matter. In a glass piece separator provided with a separating means for separating the adhered glass piece from the flow of the glass piece, the separating means comprises a mechanical shock removing device that bounces off the foreign matter adhered glass piece. Separator. 4. A charging step of charging a glass piece to be selectively separated into a flow path for flowing the glass piece, and a detection for irradiating the glass piece flowing in the flow path with light to detect a foreign material-attached glass piece to be separated. And a separation step of separating the detected foreign matter-attached glass piece from the glass piece flowing in the flow path, and a collection step of collecting the glass piece separated from the foreign matter-attached glass piece in the separation step. A method of collecting glass fragments, comprising detecting the foreign substance-attached glass fragments to be separated by irradiating the glass fragments flowing in the flow path from a plurality of directions to the same position in the detecting step. Characteristic method of collecting glass fragments. 5. A charging step of charging a glass piece to be selectively separated into a flow path for flowing the glass piece, and a detection for irradiating the glass piece flowing in the flow path with light to detect a foreign material-attached glass piece to be separated. And a separation step of separating the detected foreign matter-attached glass piece from the glass piece flowing in the flow path, and a collection step of collecting the glass piece separated from the foreign matter-attached glass piece in the separation step. A method of collecting glass pieces, wherein in the detection step, while flowing a liquid having a refractive index close to that of glass together with the glass pieces into the flow path,
A method for collecting glass fragments, which comprises irradiating light to detect foreign substance-attached glass fragments to be separated. 6. A charging step of charging a glass piece to be selectively separated into a flow path for flowing the glass piece, and a detection for irradiating the glass piece flowing in the flow path with light to detect a glass piece attached with a foreign substance to be separated. And a separation step of separating the detected foreign matter-attached glass piece from the glass piece flowing in the flow path, and a collection step of collecting the glass piece separated from the foreign matter-attached glass piece in the separation step. A glass piece collecting method, wherein in the separating step, the foreign matter-attached glass piece detected in the separating step is mechanically bounced and separated from the glass piece flowing in the flow path. Recovery method. 7. A glass piece recovered by the method for recovering a glass piece according to claim 4, 5 or 6 is used as a raw material, and the recovered glass piece is put into a glass melting furnace for plate glass molding. A method for producing plate glass, which comprises melting and producing plate glass.