JP2006137625A - Heating and pressurizing bag for manufacturing laminated sheet glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a heating and pressurizing bag for manufacturing a laminated sheet glass which has parts having a large bending. <P>SOLUTION: The bag comprises a flexible and gas-tight constitution film and has an almost square front surface, and is constituted so that it is shrinkable in the X axis direction, the Y axis direction and the Z axis direction of the front surface when its inside is reduced in pressure by sucking, by constituting the bag such that its mutually opposed two sides are bonded to be closed, one of other mutually opposed two sides is bonded to be closed and other side is provided with an opening part of which the tongue pieces open in the left and right directions, and to respective tongue pieces, shape-keeping levers are attached adjacently so as to form a pair, and when the adjacent shape-keeping levers are juxtaposed, each of opening parts is closed, also the bag is hung from a base with flexible hanging tools at the upward bonded part of two bonded parts of mutually opposed sides while positioning the opening part directed sideways. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a bag that applies pressure to the entire surface of glass in order to closely bond glass plates with a polymer film interposed between the glass plates in the production of laminated glass. In particular, the present invention relates to a heat and pressure bag for producing laminated glass that can apply pressure to the entire surface of the glass along the entire curved surface of the glass without unevenness.

  In order to prevent debris from scattering even if it is broken, an automotive windshield or a large window glass of a high-rise building is interposed between a glass plate and a glass plate with a heat-meltable polymer film such as polyvinyl butyral. A so-called laminated glass is used in which this polymer film is melted by heating and the glass plates are closely bonded to each other.

  This laminated glass is formed into a flexible bag (hereinafter simply referred to as “bag”) that can reduce the internal pressure after interposing a polymer film that bonds the glass plates between two glass plates. In general, heat treatment is performed in a hot atmosphere of 100 to 130 ° C. for 10 to 15 minutes, and air in the bag is continuously sucked during this treatment time to be contained between two glass plates. It is manufactured by removing a small amount of air and by adhering two glass plates between the constituent films of the bag and fusing them with a molten polymer film with a pressure difference generated inside and outside the bag.

  Since the production of this laminated glass is carried out in a continuous process on the traveling line, the bag used for this is unattached without interruption after the suction, heating, and pressurization steps are completed and the laminated glass is taken out. A glass plate is inserted and used repeatedly in the same process as described above.

  Thus, since the production of the laminated glass is performed on the traveling line, the work of putting the unadhered glass plate into the bag in a state of being overlaid or taking out the laminated glass after the bonding can be quickly performed. It is necessary.

  Further, the bag constituting film contacts the entire surface of each of the two non-adhering polymerized glass plates contained in the bag as much as possible, and applies equal pressure to each part on the glass plate. It is necessary.

  In order to satisfy these requirements, as shown in FIG. 7, a conventional bag has a so-called laminated fabric in which rubber or a synthetic resin film is laminated on both sides of a base fabric, and the constituent membrane has a predetermined size. The bag H is a square-shaped bag H with an opening (d) on the other hand, with the two sides cut into two to make the joints (a), (b), (c) on the other hand, This bag H is hung on the pedestal bar (f) through the handshake (e) with the opening (d) facing upward, and as shown in FIG. The opening (d) is closed by winding it around (f), bending it into a pin curve and hanging it down.

As shown in FIG. 8, the conventional bag opening (d) has a blocking function capable of maintaining the interior in a negative pressure state simply by bending the base bar (f) into a pin curve and hanging it down. The inner surfaces of both lip pieces of the opening (d) are shaped by adhering the lips of the opening (d) to each other with a thick plate or the like so as to be in close contact with each other.
No. 7-45546

  Since the conventional heating and pressurizing bag described above is hooked on the pedestal bar in a pin-curve shape, when the bag is sucked and the inside is decompressed, the movement of the bag is extremely suppressed, and the decompression is accompanied. The behavior of the bag constituent membrane is small. However, when the glass to be manufactured is of a relatively gentle and small bend like the windshield of a conventional automobile, even if the behavior of the constituent film is small, the bag constituent film is formed on the entire surface of the glass plate. Has been used for the production of laminated glass without any problem.

However, in recent years, automobile windshields tend to be designed so that the left and right sides have large bends.
That is, in the conventional structure, there are columns at the corners, and two surfaces that are bent at right angles through the columns are formed, and glass plates are individually provided on each of these surfaces. However, in recent years, there has been a tendency to design a glass plate that integrally removes the pillars at the corners and bends the glass plate with a curvature close to a right angle so that the glass plate itself has a bent surface provided with corners.

  Therefore, if the laminated glass to be manufactured has a large bend like U-shape or L-shape like the windshield of a recently designed automobile, for example, the opening is fixed to the pedestal bar halfway. In a conventional bag that is in a broken state, when the pressure is reduced, the bag constituent film cannot behave so as to adhere to the entire curved surface of the glass, and a gap is partially formed between the constituent film and the glass plate. Can't apply pressure to that part. In order to eliminate this phenomenon, there is a problem that, if the pressure reduction is further increased, there is a risk that the glass is broken.

  The present invention has been made in view of the above-described points, and the object of the present invention is to form a bag by loosely forming a bag, and through a hanging tool capable of extending and retracting the bag. When the bag is aspirated and decompressed, the constituent film of the bag can be contracted in the X-axis direction, the Y-axis direction, and the Z-axis direction, and the bag constituent film has the shape of a glass plate. Even a glass plate that adheres closely and has a large bend can behave so that the constituent film adheres evenly to the entire surface of the glass plate without creating a gap between the curved surface of the glass plate and the constituent film. The object is to obtain a heated and pressurized bag for producing laminated glass.

  In order to achieve the above object, the heat and pressure bag for producing laminated glass according to the present invention is composed of a flexible and airtight constituent film, and the two opposite sides are connected to each other, and the other mutually The opposite two sides are openable openings on one side, and the front side formed by joining the other side is a flat bag with a substantially square shape. A large number of telescopic suspensions installed on the rail of the pedestal are attached to the joint portion that is the upward position of the joint portions of the two sides opposite to each other, and the shape retaining rods are paired with the opening portion. When the shape-retaining ridges that are attached adjacent to each other are aligned and aligned, the inner surfaces of the lip pieces are in close contact with each other so that the opening can be closed so that the inside of the bag can be maintained in a negative pressure state. To the rail of the pedestal at the joint on the opposite side of the opening Shape retention rods of one mounted freely moving is provided.

  The pair of retaining cages attached to the opening of the bag is closed by binding the two together with a binding tool and placing them in parallel and rotating the binding tool once to close the opening. The shape is fixed to the base.

  The bag having the above structure is formed by loosely forming the bag, and in addition to closely attaching the constituent film of the bag along the shape of the glass, the bag can be attached to the pedestal through a retractable hanging tool. Therefore, when the inside of the bag is decompressed, the bag can be contracted in the X-axis direction, the Y-axis direction, and the Z-axis direction. Therefore, even if the glass has a large bend and a large bend width, The glass can be reliably adhered to the bent portion, and the constituent films can be evenly adhered to the entire glass surface.

  In addition, the bag of the present invention has the opening positioned sideways, and the lip piece of the opening can be opened and closed with a pair of shape-retaining hooks, so that the glass plate can be easily taken in and out, and this operation can be performed quickly. .

  In addition, the pair of shape retaining jars are held in parallel by the binding tool to securely maintain the close contact of the lip pieces of the opening, and the binding tool can be easily inserted into the pair of shape retention collars. The glass plate can be put in and out quickly.

  In addition, the X-axis direction, the Y-axis direction, and the Z-axis of the bag when the inside of the bag is decompressed by installing the shape-retaining bag on the opening side and the shape-retaining side on the opposite side of the opening on the pedestal or the rail of the pedestal In spite of the contraction movement in the direction, there are effects such as maintaining the shape of the bag in a substantially square shape.

  The bag in the present invention is a flat bag having a generally square shape with no wrinkles and a front surface, generally composed of flexible and airtight constituent membranes, and two opposite sides are connected to each other. One of the other two opposite sides is an opening that can be freely opened and closed, and the other side is joined.

  The bag of the present invention has a connecting portion on one side of two connecting portions facing each other as an upward position so that the opening portion is positioned sideways, and the bag is attached to the connecting portion on the upper end that is the upward position. A large number of suspensions that can be extended and retracted are attached, and these suspensions are installed so that they can slide in the rails of the base.

  The opening of the bag of the present invention has lips that open to the left and right, respectively, and the constituent film on the inner surface of the lips is a flat surface.

  On the outside of each of the left and right lip pieces, a shape retaining bag larger than the length of the lip piece is attached adjacently so as to make a pair. The inner surface of the bag can be closed so that the inside of the bag can be maintained in a negative pressure state so that the opening can be closed. Then, the pair of shape retaining bags provided on the outside of the opening can be bound with a binding tool, and can be fixed to the pedestal.

  The joint portion on the opposite side of the opening is provided with a single shape retaining rod, and this shape retention rod is slidably attached to the pedestal rail.

  As a constituent film of the bag, a rubber laminated cloth in which rubber such as chloroprene rubber or ethylene / propylene rubber (EPDM) is laminated on both sides of a polyamide or polyester woven cloth is a preferable material.

  In Example 1, the bag is formed by cutting a laminated fabric in which a proloprene rubber is laminated on both sides of a polyamide woven fabric through an adhesive layer into a rectangular shape having a predetermined size, as shown in FIGS. 1 to 3 and FIG. In addition, the two opposite sides of the bag 1 having a substantially square front surface, that is, the upper end 2 of the bag 1 and the lower end 3 serving as the bottom are joined by heating and pressing through an adhesive intermediate rubber layer, and the like. One side of the two opposite sides is an opening 4, and the other side is heated and pressed via an adhesive intermediate rubber layer to form a joint 5 and one side is open to the other. It is formed in a bag body where three sides are joined.

On the surfaces of the lip pieces 6a and 6b of the opening 4, shape retaining ribs 7a and 7b are attached adjacently so as to form a pair. These shape retaining ridges 7a and 7b are attached to the surfaces of the lip pieces 6a and 6b via the fixing cloths 8a and 8b.
In addition, a shape retaining rod 9 is attached to the side of the side opposite to the opening 4 on the side of the connecting portion 5 via a fixed cloth 10.

  The pair of shape retaining bags 7a and 7b provided on the side of the opening 4 are installed adjacent to a position where the bag 1 can be handled as a converging body when the bag 1 is in a state of a substantially square front. Yes.

  As shown in FIG. 3, the upper end 2 of the bag 1 has a plurality of suspenders 11. . . Mounting seat 12. . . 10. A hanging tool 11. . . Is attached to a rail 13 of a pedestal (not shown) located above the bag 1 through a slider 11a.

  The shape retaining rods 7a and 7b provided in the opening 4 are bound and held in a juxtaposed state by a binding tool 14, and the binding tool 14 is rotated to wind a pair of shape retaining collars 7a and 7b. Thus, the inner surfaces of the lip pieces 6a and 6b are in close contact with each other and close the opening 4. As shown in FIG. 4, the binding tool 14 is formed into a cylindrical body and is formed by vertically penetrating through two through holes 15a and 15b, and the upper ends of the pair of shape retaining rods 7a and 7b are respectively connected to the upper and lower ends. It can be inserted into the through holes 15a and 15b.

  On the other hand, as shown in FIG. 3, the upper end of one shape retaining rod 9 provided on the opposite side of the opening 4 is connected and installed so as to be fitted and slid on the rail 13 in the same manner as the suspension 11. It is.

  Further, a valve 16 that sucks and discharges the air in the bag 1 is provided at the lower end 3 of the bag 1.

  The bag of the present invention configured as described above has two large bent glass plates 17 having a substantially U shape as shown in FIG. 5 in a bag 1 suspended from a rail 13 attached to a pedestal. After inserting a polypropylene film between them and opening it through the opening 4, as shown in FIG. 3, a pair of shape-retaining frames 7 a and 7 b are juxtaposed, and their tips are connected to the binding tool 14. After being inserted into the through hole 15 and rotated clockwise, it is fixed to the pedestal. At this time, the inner surfaces of the lip pieces 6a and 6b of the opening 4 held between the pair of shape retaining rods 7a and 7b are in close contact with each other. On the other hand, the shape retaining rod 9 provided on the side of the coupling portion 5 opposite to the opening 4 has its upper end fitted to the rail 13.

  Next, when the air in the bag 1 is sucked and discharged from the valve 16, the bag 1 contracts as shown in FIG. 6 while the constituent films of the bag 1 perform various behaviors.

  In the contraction movement of the bag 1 at this time, the tip of the lifting tool 11 and the shape retaining rods 7a and 7b slides in the groove in the rail 13 in the X-axis direction, and a number of suspensions in the Y-axis direction. Ingredient 11. . . Further, the Z-axis direction occurs without any trouble due to the bumps of the bag 1, and as a result, the constituent films are in close contact with the entire surface of the glass plate. The glass plate 17 is not damaged even in the curved portion.

As described above, the two glass plates 17 placed in the negative-pressure bag 1 are subjected to pressure and heating processing by a constituent film caused by intake air while running with a pedestal on a conveyor belt, and laminated glass. It becomes.
After the predetermined processing time has elapsed, the bag is removed from the pair of shape retaining ribs 7a and 7b, and then the binding tool 14 is removed, and the shape retaining collar 9 on the coupling portion 5 side is removed from the rail 13. , Move the pair of shape retaining ridges 7a, 7b, open the lips 6a, 6b, take out the glass plate 17 from the bag 1, immediately put the untreated glass in the bag 1, Used continuously for heating and pressurizing.

It is a front view of the bag of the present invention. It is a perspective view which opens and shows the opening part of the bag of this invention. It is a front view related to the bag of the present invention and is shown suspended from a rail shown in partial cross section. It is a perspective view of the binding tool inserted in the shape-retaining hook which makes the pair provided in the bag of this invention. It is a perspective view of a glass plate. It is a front view which shows the use condition of the bag of this invention. It is a front view of the conventional bag. It is a perspective view showing a conventional bag suspended from a rail in a pin-curve shape.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bag 2 Upper end part 3 Lower end part 4 Opening part 5 Coupling part 6a, 6b Lip piece 7a, 7b Shape retention hook 8a, 8b Fixed cloth 9 Shape retention collar 10 Fixed cloth 11 Lifting tool 11a Slider 12 Mounting seat 13 Rail 14 Binder 15 Through-hole 16 Valve 17 Glass plate

Claims (2)

Consists of a flexible and airtight configuration film, two opposite sides are joined, the other two opposite sides are openable on one side, and the other side is joined The front side of the bag is a flat bag having a substantially square shape, and the bag has an opening located laterally, and the coupling portion that is the upward position of the coupling portions of the two sides facing each other has a pedestal rail. A large number of stretchable suspensions to be installed are attached to the openings, and the shape retaining ridges are attached adjacent to each other so as to form a pair. The inner surface of the lip can be in close contact so that the inside of the bag can be kept in a negative pressure state so that the opening can be closed freely, and the joint on the opposite side of the opening can be slid on the pedestal rail It is composed of a single shape-retaining hook to be attached. It was heated pressurized bag glass production. The pair of shape-retained saddles attached to the opening of the bag is formed by binding the two together with a tie and placing them side by side, closing the tie once to close the opening and making this pair. The heat and pressure bag for manufacturing laminated glass according to claim 1, wherein the bag is fixed to a pedestal.

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