JP2002326849A - System for separating and recovering laminated glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for separating and recovering a laminated glass which facilitates easy peeling of glass pieces from an intermediate membrane. SOLUTION: In this separation/recovery system, as the sending speed of a laminated glass G by a pair of carrying rollers 32 at the downstream side is higher than that by a pair of carrying rollers 31 at the upstream side, there happens a slippage at the bonding interface between the intermediate membrane P and glass pieces G caused by extension of the intermediate membrane P so that the glass pieces G adhering to the upper surface of the intermediate membrane P become only riding on the intermediate membrane P, and part of the glass pieces G adhering to the lower surface of the intermediate membrane P falls downward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for separating and recovering laminated glass used for an automobile windshield or the like.

[0002]

2. Description of the Related Art Laminated glass is used as a windshield of an automobile or a window glass of a building. The laminated glass is obtained by joining and integrating an outer glass (for example, tempered glass) and an inner glass (for example, ultraviolet absorbing glass) with an intermediate film (for example, polyvinyl butyral).

In consideration of effective use of resources at the time of end-of-life vehicles, it is necessary to separate and collect glass (outer glass and inner glass) and resin (intermediate film). However, even if the glass is crushed finely, the interlayer cannot be crushed,
Fine glass pieces remain firmly bonded to the interlayer and cannot be easily separated.

Japanese Patent Laid-Open Publication No. Sho 51-46 discloses a technique for separating polyvinyl butyral by utilizing the property of polyvinyl butyral, that is, the property of absorbing water and swelling when contacted with water so that the bonding strength becomes extremely weak.
No. 308 is proposed.

Japanese Patent Application Laid-Open No. 51-46308 discloses that after a crease is made in a laminated glass, the interlayer is swelled by immersion in water or the like, and then an external force is applied to the glass plate to separate the interlayer from the interlayer. The external force includes providing impact force, tensile force and shear force.

[0006]

It is certain that a glass piece is easily separated from an interlayer film by applying an impact force, a tensile force and a shear force to a glass plate. However,
The above prior arts do not disclose or suggest how to apply impact force, tensile force and shear force. If only an impact force, a tensile force or a shear force is applied, the efficiency of separation and recovery may be rather deteriorated.

[0007]

SUMMARY OF THE INVENTION The present invention provides a means for efficiently separating glass fragments from an intermediate film while maintaining continuity with the preceding and following steps in a series of steps from crushing to recovery. The purpose is to:

In other words, the system for separating and recovering laminated glass according to the present invention comprises a crushing device for crushing the laminated glass joined via the intermediate film, and swelling the intermediate film to which the crushed glass pieces are attached. It consists of a water tank or a steam chamber, an upstream transport roller pair and a downstream transport roller pair, and the speed of the laminated glass fed by the downstream transport roller pair is faster than the speed of the laminated glass transport by the upstream transport roller pair. It comprises a set stretching device and a separating and collecting device that is disposed downstream of the stretching device and separates and collects glass pieces from the stretched intermediate film.

When the intermediate film is stretched by the difference in the feed speed between the upstream conveying roller pair and the downstream conveying roller pair, a shearing force acts on the joint surface between the intermediate film and the glass piece, and the glass piece is turned into an intermediate film. Peeled off from

When the pair of transport rollers is used as the stretching device, it is preferable that the downstream transport roller pair can be moved in the transport direction of the laminated glass. With such a configuration, the transport roller pair on the downstream side can be moved to the downstream side while stretching the intermediate film,
As a result, the intermediate film can be stretched with a certain tension.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall view of a separation and collection system for laminated glass according to the present invention. In the separation and collection system 1, a water tank 20 is continuously arranged on the downstream side of a crushing device 10 for crushing the laminated glass G. The stretching device 30 is continuously arranged on the downstream side, and the separation and recovery device 40 is arranged on the downstream side of the stretching device 30. The crushing device 1
The stocker 2 is arranged near zero.

The crushing device 10 has a pair of crushing rollers 12, 12 at the end of a feed roller 11. The crushing roller 12 has a large number of spike-shaped projections 13 implanted on its surface in a staggered manner, and finely crushes the laminated glass G sent between the crushing rollers 12. Since the intermediate film P is not crushed, a large number of crushed glass pieces adhere to the surface of the intermediate film P.

Further, since a part of the glass piece adhering to the lower surface of the intermediate film P is separated by gravity, the glass piece is collected via a duct-like guide 14 into a box 15 arranged at the bottom of the crushing apparatus. I am trying to do it.

A number of pallets 21 are arranged in a water tank 20 adjacent to the crushing device 10. These pallets 21 circulate in the water tank 20 by driving a chain 22. Room temperature water or hot water is supplied into the water tank 20. In the case of room temperature water (0 to 20 ° C.), the laminated glass W needs to be immersed in the water tank for 24 hours, but in the case of warm water (80 ° C.), the interlayer swells sufficiently in about 1 hour. . Therefore, the moving speed of the pallet 21 is adjusted according to the temperature of the water. In the illustrated example, a water tank is used, but a steam chamber or a mist chamber may be used.

The stretching device 30 adjacent to the water tank 20 includes:
The stretching device 30 is arranged to stretch the swollen intermediate film, and as shown in FIG.
1 and a downstream transport roller pair 32, the upstream transport roller pair 31 is composed of a lower drive roller 31a and an upper driven roller 31b, and the downstream transport roller pair 32 is a lower drive roller 32a. And an upper driven roller 32b.

A small-diameter drive pulley 33a, which is rotated by a motor, is provided below the transport roller pairs 31, 32.
And a large-diameter drive pulley 33b.
3a and the upstream drive roller 31a are connected by a timing belt 34, and the large-diameter drive pulley 33b and the downstream drive roller 32a are connected by a timing belt 35.

With the above-described configuration, the feed speed of the transport roller pair 32 on the downstream side becomes faster than the feed speed of the laminated glass G by the transport roller pair 31 on the upstream side. As a result, as shown in FIG.
As shown in FIG. 3 (b), the bonding position of the intermediate film P is shifted by the extension of the intermediate film P, and the glass piece G attached to the upper surface of the intermediate film P is simply placed on the intermediate film P, Part of the glass piece G attached to the lower surface falls downward as shown in FIG. The dropped glass pieces are collected in a box 36 below.

Further, the downstream transport roller pair 32 is movable along the transport direction, and the downstream transport roller pair 32 is moved between the transport roller pairs 31 and 32 at a position close to the upstream transport roller pair 31. Alternatively, the intermediate film can be pulled by fixing the upstream transport roller pair 31 and transporting the downstream transport roller pair 32 while moving it downstream. In this case, the transport roller pairs 31, 3
The two rotation speeds may be equal.

On the other hand, the separation and recovery device 40 disposed adjacent to the downstream side of the pulling device 30 has a first transport path 41 and a second
The first transport path 41 is supported on a base 43 via a spring 44 so that the downstream side is inclined slightly downward, and is connected to a vibration device (not shown). Is constituted by a mesh material 45 such as a wire net.

On the other hand, the second transport path 42 is
1 is supported below the base 46 so that the upstream side is inclined downward, is connected to a vibration device (not shown), and further has a transfer surface formed of a mesh material 4 such as a wire mesh.
7.

Thus, the first transport path 4
The laminated glass W sent out on the first mesh member 45 gradually moves downstream by vibration, and the glass pieces remaining on the lower surface of the intermediate film P are shaken downward, and are boxed via the guide 48. Collected in 49. Also, the first
The laminated glass W is inverted when moving from the transfer path 41 to the second transfer path 42, and the glass pieces attached to the inverted and lower surface are collected in the box 50 through the mesh material 47. The intermediate film P from which the glass pieces have been separated is collected in the box 51.

Note that the present invention is not limited to the above-described embodiment, and the laminated glass may be crushed immediately after the crushed laminated glass without using a water tank or a steam room, and the laminated glass may be immediately applied to a tensioning device.

[0023]

According to the present invention as described above,
In crushing the laminated glass and separating and collecting the interlayer and the glass, the interlayer is pulled to exert a shearing force on the bonding surface between the interlayer and the glass piece, forcing the interlayer and the glass piece into contact. Since it is shifted, the glass piece can be easily peeled from the intermediate film.

[Brief description of the drawings]

FIG. 1 is an overall view of a laminated glass separation and recovery system according to the present invention.

FIG. 2 is a diagram illustrating the operation of a tension device.

FIGS. 3A to 3C are diagrams for explaining a process in which a glass piece is separated from an intermediate film.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Separation collection | recovery system, 2 ... Stocker, 10 ... Crushing apparatus, 11 ... Feeding roller, 12 ... Crushing roller, 13 ... Projection, 14 ... Guide, 15 ... Collection box, 20 ... Water tank,
21: Pallet, 22: Chain, 30: Tension device, 3
Reference numeral 1 denotes a pair of conveying rollers on the upstream side, 31a denotes a driving roller, 31
b: driven roller, 32: transport roller pair on the downstream side, 32a
.., A driving roller, 32b, a driven roller, 36, a collection box, 40, a separation and collection device, 41, a first conveyance path, 42,
2nd conveyance path, 43 ... base, 44 ... spring, 45 ...
Mesh material, 46 ... Base, 47 ... Mesh material, 49,5
0: collection box, G: laminated glass (glass piece), P:
Interlayer.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Terumi Nagao 2-1-1 Minami-Aoyama, Minato-ku, Tokyo Honda Motor Co., Ltd. F-term (reference) 4D004 AA26 AA50 AC04 CA04 CA12 CA50 CB13 CB45 CC01 CC03 4F301 AA19 AB02 BF04 BF08 BF12 BF31 BG22 4G061 AA02 AA04 BA01 BA02 CA02 CB03 CB19 CD02 CD12 CD18 DA61

Claims (2)

[Claims] 1. A crushing device for crushing a laminated glass joined via an intermediate film, a water tank or a steam chamber for swelling the intermediate film to which the crushed glass pieces are attached, and a pair of conveying rollers on the upstream side And a downstream conveying roller pair, wherein the feeding speed of the laminated glass by the downstream conveying roller pair is set higher than the feeding speed of the laminated glass by the upstream conveying roller pair, and a downstream of the stretching device. And a separating and collecting device for separating and collecting the glass pieces from the stretched intermediate film. 2. The laminated glass separation and recovery system according to claim 1, wherein the downstream pair of transport rollers constituting the stretching device is movable along the transport direction of the laminated glass. Separated glass separation and recovery system.