JP2018024557A - Molding bag for laminated glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molding bag for a laminated glass improved in such a manner that the opening and closing of an opening part, particularly, the closing can be performed more swiftly than the conventional one without damaging satisfactory air-tightness when it is closed by further zealous study.SOLUTION: Provided is a molding bag for a laminated glass in which three ways have opening parts K capable of opening, and each opening part K is composed so as to be switchable between an opening state and a closing state, in which each opening part K has the first opening edge 10 of one bag body 2 and the second opening edge 11 of the other bag body 3, the first and second opening edges 10, 11 are respectively provided with the first and second mating parts 10A, 11A made of rubber, the opening state is a state where the first mating part 10A and the second mating part 11A are mutually separated, and the closing state is a state where the mating face 10a of the first mating part 10A and the mating face 11a of the second mating part 11A are superimposed.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a laminated bag for laminated glass used for manufacturing a windshield of an automobile or the like.

  For automobile windshields and high-rise building windowpanes, a hot-melt polymer film such as polyvinyl butyral is placed between the glass plates in order to prevent fragments from scattering even if they are broken. There is used a so-called laminated glass having a structure in which a polymer film is heated and melted and the glass plates are brought into close contact with each other.

  Laminated glass is produced by the following process. That is, a flexible bag, that is, a molding bag, capable of greatly reducing the internal pressure to near vacuum after providing a polymer film for bonding glass plates between two glass plates and interposing them. Put in. Next, the molding bag is generally heat-treated in a hot atmosphere at 100 to 130 ° C. for 10 to 15 minutes, and during this time, the air in the molding bag is continuously sucked and two sheets of glass are kept. Removes traces of air contained between the plates. In this manner, the two glass plates are sandwiched between the bag walls by the pressure difference and heat generated between the inside and the outside of the forming bag, and are heated by pressure.

  The laminated glass manufacturing process is continuously performed on a traveling line. In other words, after the heating, suction, and pressurization steps for the unbonded glass plate placed in the molding bag and taking out the laminated glass, the molding bag immediately puts another unbonded glass plate. It is used repeatedly in the same process as above. Therefore, in order to perform pressure reduction by suction smoothly and quickly, the opening can be quickly closed and reliable adhesion (air tightness) in the closed state is also required.

  As a conventional means for closing the opening of the forming bag, as disclosed in Patent Document 1, there is a means for providing a continuous airtight fastener at each opening edge of the bag. However, this airtight fastener has a problem that it takes time and labor to open and close the forming bag because it requires a considerable force to open and close because of its airtight structure.

Further, as disclosed in Patent Document 2, means using a seal member in which a ridge extending along an opening and a ridge that can be engaged with the ridge are distributed and arranged in a pair of bag body portions. There is also.
However, in this seal member, since it is an operation of sequentially pushing and engaging a series of ridges and ridges from the end, it still takes time. In addition, the ridges and ridges are slightly deformed in length due to the engagement work while being handled strongly, and it is often forced to redo, such as disengagement on the way, It was not an easy task.

JP 2003-321257 A JP 2006-182581 A

  The object of the present invention is to further improve the molded bag for laminated glass that can be opened and closed, especially the closing operation, more quickly than before without losing good airtightness when closed. Is to provide

The invention according to claim 1 has an opening K that can open at least one of the four sides, and the opening K is configured to be switchable between an open state in which the opening K is opened and a closed state in which the opening K is sealed. In the laminated bag for laminated glass,
The opening K includes the first opening edge 10 of one bag body 2 including the first opening edge 10 and the second opening edge 11 of the other bag body 3 including the second opening edge 11. The first opening edge 10 is provided with a first rubber mating portion 10A, and the second opening edge 11 is provided with a second rubber mating portion 11A.
The open state is a state where the first mating portion 10A and the second mating portion 11A are separated from each other, and the closed state is a mating surface 10a of the first mating portion 10A and the second mating portion 11A. It is characterized by comprising a state in which the mating surface 11a is superimposed.

The invention according to claim 2 is the molded bag for laminated glass according to claim 1,
The rubber material constituting the first and second mating portions 10A and 11A is EPDM, and the hardness is set to 40 to 70, respectively.

The invention according to claim 3 is the molded bag for laminated glass according to claim 1 or 2,
Either one of the first opening edge 10 and the second opening edge 11 is provided with a winding piece 12 that can be covered with the opening K in the closed state, and the tip of the winding piece 12 The part is equipped with one fastener member 13A of the pair of fastener members 13A, 13B forming the surface fastener 13,
The other one of the first opening edge 10 and the second opening edge 11 can be overlapped with the one fastener member 13A of the wound piece 12 in a state of covering the opening K in the closed state. A fastener member 13B is provided.

The invention according to claim 4 is the molded bag for laminated glass according to any one of claims 1 to 3,
A step 10C is formed on one of the first mating portion 10A and the second mating portion 11A along the longitudinal direction of the mating surface 10a. A step 11C is formed along the mating surface 11a so that the mating surfaces 10a and 11a are overlapped with each other on the other of the portion 10A and the second mating portion 11A in a closed state. It is characterized by being.

The invention according to claim 5 is the molded bag for laminated glass according to any one of claims 1 to 3,
The first mating portion 10A and the second mating portion 11A are fitted into one end 10A of the first mating portion 10A and the second mating portion 11A in the closed state in the other end 11A. A fitting insertion part 14 is provided.

According to the first aspect of the present invention, the opening K is closed by a simple and easy operation of simply overlapping the mating surface 10a of the first mating portion 10A and the mating surface 11a of the second mating portion 11A. Can do. In the closed state, the first mating surface 10a and the second mating surface 11a are in a good surface contact state, and an excellent sealing action that can withstand negative pressure due to the decompression of the molding bag 1, that is, excellent airtightness is exhibited. become able to.
As a result, through further diligent research, we provide a molded bag for laminated glass that is improved so that opening and closing operations, especially closing operations, can be performed more quickly than before without losing good airtightness when closed. be able to.

  According to the invention of claim 2, the rubber is made of EPDM and has a hardness of 40 to 70, so that the rubber is extremely wide by simply overlapping the first mating surface 10a and the second mating surface 11a. An intimate surface contact state is obtained, and the above-described excellent airtightness can be further exhibited. Further, even if the molding bag 1 is used repeatedly, the first and second opening edges 10 and 11 are unlikely to be deformed or out of shape, so that excellent durability that can be used for a long time is also obtained. be able to.

  According to invention of Claim 3, it becomes possible to exhibit the following effects. That is, when the molding bag 1 is depressurized in order to heat and pressurize the laminated glass incorporated in the molding bag 1, a tensile force due to negative pressure acts on the bag bodies 2 and 3, and the first and The second mating portions 10A and 11A may be warped and deformed so as to be peeled from each other, and the airtightness of the opening K may be impaired.

However, the first and second opening edges 10 and 11 in the closed state can be wound around the winding piece 12, and the first and second opening edges 10 and 11 can be pressed so as not to be separated from each other. The warping deformation described above is prevented or regulated, and stable airtightness can be maintained.
In addition, there is an advantage that the wound piece 12 can be maintained in the wound state by a simple and easy operation using the hook-and-loop fastener.

  According to the fourth aspect of the present invention, the steps for fitting the recesses and projections to each other are distributed to the first and second opening edges 10 and 11, so that when the opening K is closed, these steps 10C and 11C are arranged. What is necessary is just to overlap | superpose the 1st and 2nd opening edge 10 and 11 so that it may contact. That is, by such a simple operation, a good surface contact state in which the first mating surface 10a and the second mating surface 11a are not displaced can be obtained quickly and with little effort.

  According to the invention of claim 5, since the first mating portion 10A and the second mating portion 11A are locked by fitting, the warping deformation of the first and second opening edges 10 and 11 at the time of depressurization described above. There is an advantage that can be prevented or regulated more firmly.

Front view of laminated glass forming bag The front view which shows the state which the bag for shaping | molding of FIG. 1 opened (A) is an action figure which shows closing operation of an opening part, (b) is the sectional view on the AA line of FIG. The opening part which has a mating part of another structure is shown, (a) is an operation figure which shows closing operation, (b) is sectional drawing of the part corresponded to the AA line of FIG.

  Hereinafter, an embodiment of a molded bag for laminated glass according to the present invention will be described with reference to the drawings as being used for manufacturing a windshield of an automobile.

[Example 1]
As shown in FIGS. 1 and 2, a laminated glass forming bag (hereinafter abbreviated as “forming bag”) 1 is a pair of bag bodies in which only the bottoms which are the long side portions of each other are integrated. The bag main bodies 2 and 3 are open at almost the entire area of the long side and both short sides, that is, three sides are openable and closable.
The forming bag 1 has a front end opening Ks that is a front side long side part, and one side and other side openings Ki and Kt that are open except the end part on the base side and that are both short side parts. . That is, the molding bag 1 has an opening K (Ki, Ks, Kt) in which one or more of the four sides are opened, and can be switched between an opened state in which the opening K is opened and a sealed closed state. It is configured.

The bag bodies 2 and 3 are made of an EPDM laminated cloth (ethylene propylene rubber laminated cloth) 4 in which ethylene propylene rubber is laminated on both front and back sides of a polyester fiber cloth, and has a front rubber layer and a back rubber layer. A resin film sheet 5 is pressure-bonded. Further, the outer surface of the bottom of each bag body 2, 3 is covered with a reinforced rubber band 6 having a folded shape.
Inside the forming bag 1, twisted ropes 7 positioned in the front, rear, left and right directions are provided by a plurality of loop-shaped cloths 8 on the inner surface side of one bag body 2 which is the lower side when used as the forming bag 1. ing. The twisted rope 7 and the gap formed thereby become air passages, and the pressure reduction in the molding bag 1 using the suction nozzle 9 is performed smoothly.

Each of the openings Ki, Ks, Kt has an airtight structure for enabling the pressure reduction in the bag when the openings Ki, Ks, Kt are closed. That is, as shown in FIG. 2 and FIG. 3, the opening K includes a first opening edge 10 of one bag body 2 having a first opening edge 10 made of rubber and a second opening edge 11 made of rubber. It has the 2nd opening edge 11 of the other bag main body 3 provided.
In FIG. 1, 19 is a cloth handle protruding in a loop shape, and 20 is an outer surface reinforcing band of each bag body 2, 3. The torsion rope 7 has a straight bottom rope 7A disposed at the bottom and a three-way rope 7B disposed in a “U” shape along each of the openings Ki, Ks, Kt. It is configured.

The first opening edge 10 includes an outer first mating portion 10A, an inner first overlapping portion 10B having a height lower than the first mating portion 10A, and an inner end and a first overlapping portion of the first mating portion 10A. It has a convex step 10C made of a vertical wall connecting the outer end of 10B.
The second opening edge 11 includes a second mating portion 11A on the outer side, a second overlapping portion 11B that is higher than the second mating portion 11A and on the inner side, and an inner end and a second overlapping portion of the second mating portion 11A. It has a concave step 11C formed of a vertical wall connecting the outer end of 11B.

The open state of the molding bag 1 (see FIG. 2) is a state in which the first mating portion 10A and the second mating portion 11A are separated from each other. At this time, both the first overlapping portion 10B and the second overlapping portion 11B, and the convex step 10C and the concave step 11C are separated from each other.
In the closed state of the molding bag 1 (see FIG. 1), the first mating surface 10a that is the upper surface of the first mating portion 10A and the second mating surface 11a that is the lower surface of the second mating portion 11A are overlapped. It depends on the state. At this time, it is convenient if both the first overlapping portion 10B and the second overlapping portion 11B and the convex step 10C and the concave step 11C are overlapped.

  The first mating surface 10a and the second mating surface 11a are sealing surfaces, and the first and second mating portions 10A and 11A, that is, the first and second opening edges are provided so that excellent airtightness can be obtained simply by overlapping. EPDM is preferable as the material of the rubber that constitutes 10 and 11, but other materials (NBR, H-NBR, CR) may be used. The rubber hardness is set to 40-70.

  By such a rubber material setting device, it is possible to obtain a surface contact state in which the first mating surface 10a and the second mating surface 11a are simply overlapped with each other and to withstand a negative pressure due to the decompression of the molding bag 1. The sealing action, that is, excellent airtightness can be exhibited. Further, even when the molding bag 1 is used repeatedly, the first and second opening edges 10 and 11 are not deformed or out of shape, and have excellent durability.

As shown in FIGS. 2 and 3, the wrapping pieces 12 that wrap around the first opening edge 10 and the second opening edge 11 of the molding bag 1 in the closed state are covered with the three openings K (Ki, Ks, Kt).
The wound piece 12 is formed by extending one bag body 2 outward from the first opening edge 10 by a predetermined length, and a pair of fastener members 13A and 13B forming a hook-and-loop fastener 13 at the front end portion thereof. One of the fastener members 13A is provided in a strip shape. And the other fastener member 13B is equipped with the strip | belt shape in the outer surface side of the other bag main body 3 in the immediate vicinity of the 2nd opening edge 11. FIG.

As shown in FIG. 2, the wound piece 12 is developed on the extension of one bag body 2 in the opened state, and is in a closed state in which the first opening edge 10 and the second opening edge 11 are overlapped. The winding operation is performed.
That is, as shown in FIG. 3 (a), the winding piece 12 is lifted upward, and the first opening edge 10 and the second opening edge 11 that are overlaid are wound and covered so as to be covered. In this state, one fastener member 13A is overlapped with the other fastener member 13B to cause the surface fastener 13 to function.
Then, as shown in FIG. 3B, the winding piece 12 is locked and fixed in a state of wrapping and covering the closed opening K.

A state in which the first opening edge 10 and the second opening edge 11 are overlapped, that is, the closed state of the molding bag 1 in which the first mating surface 10a and the second mating surface 11a are in close contact with each other, The pressure is reduced from the suction nozzle 9 using a suction pump (not shown).
If the molding bag 1 is greatly decompressed (for example, close to a vacuum) to heat and pressurize the laminated glass housed therein by this decompression operation, the bag bodies 2 and 3 are pulled by a negative pressure. The force acts, and the first and second mating portions 10A and 11A are warped up and deformed (returned and deformed) just as they are peeled from each tip side.

By strongly winding and fixing the winding piece 12, the warping and deformation of the first and second opening edges 10 and 11 can be prevented or restricted as much as possible, and stable airtightness can be maintained. As shown in FIGS. 1 and 2, the wrapping piece 12 cannot be formed at the corner portions 21 and 21 that are the boundaries between the one-side and other-side openings Ki and Kt and the tip opening Ks.
Therefore, when there is a concern about the warping of the first and second mating portions 10A and 11A at the corner portions 21, the first clip 22 can be used with a clip 22 (see the phantom line in FIG. 1) that can be strongly elastically clamped. The opening edge 10 and the second opening edge 11 may be sandwiched.

When the opening K is closed, if the second opening edge 11 is placed on the first opening edge 10 with the concave step 11C applied to the convex step 10C, the first mating surface 10a and the second It is possible to superimpose easily and quickly with little effort in a good surface contact state where the mating surface 11a is not displaced.
In this closed state, as shown in FIG. 3B, if the first overlapped portion 10B and the second overlapped portion 11B are just brought into surface contact and become the second seal portion, the airtightness is further improved, which is convenient. However, in order to reliably obtain the surface contact state between the first mating surface 10a and the second mating surface 11a, the first overlap portion 10B and the second overlap portion 11B may be set slightly apart in the closed state.

[Embodiment 2]
As shown in FIG. 4, as the opening K, either the first mating portion 10A or the second mating portion 11A, for example, the first mating portion 10A is closed so that the mating surfaces 10a and 11a are overlapped with each other. In the state, the other may be provided, for example, a configuration in which a fitting portion 14 that fits into the distal end portion 18 of the second mating portion 11A is provided.

As shown in FIG. 4 (a), the first mating portion 10A has a cross-sectional shape that is set to a rubber shape such as a horizontally laid J shape, and is a vertical wall that continues to the first mating surface 10a. 15 and the return lateral wall 16 constitute a fitting portion 14 that is recessed inwardly.
11 A of 2nd mating parts are comprised by the rubber-made things from which the cross-sectional shape becomes a rectangle by the rubber layers 17 and 17 formed in the upper and lower sides of the EPDM laminated cloth 4 of the other bag main body 3. As shown in FIG.

  In order to close the opening K according to the second embodiment, the second mating portion 11A is moved laterally (see FIG. 4A), and the tip 18 is pushed into the fitting portion 14 of the first mating portion 10A. It fits and the 1st mating surface 10a and the 2nd mating surface 11a are piled up. Then, the winding piece 12 is operated to wind around the first mating portion 10A on which the second mating portion 11A is set, as shown in FIG. 4B, and one fastener member 13A is wound on the other fastener member 13B. The hook-and-loop fastener 13 is made to function in layers.

  In the opening K according to the second embodiment, it is necessary to push the second mating portion 11A into the first mating portion 10A, but the first mating portion 10A and the second mating portion 11A are locked by fitting. Therefore, there is an advantage that the first and second opening edges 10 and 11 at the time of pressure reduction described above can be prevented or regulated more firmly.

[Another embodiment]
The structure in which the winding piece 12 is provided in the other bag main body 3 which becomes upper side may be sufficient. In the opening K according to the first embodiment, the unevenness of the steps 10C and 11C may be reversed.

2 one bag body 3 other bag body 10 first opening edge 10A first mating portion 10C step 10a mating surface 11 second opening edge 11A second mating portion 11C step 11a mating surface 12 winding piece 13 surface fastener 13A one fastener Member 13B The other fastener member 14 Fitting portion 18 Tip portion K Opening portion

Claims (5)

One or more of the four sides have an opening that can be opened, and the opening is a laminated glass molding bag configured to be switchable between an open state in which it is opened and a closed state in which it is sealed,
The opening includes the first opening edge of one bag body having a first opening edge and the second opening edge of the other bag body having a second opening edge, and the first opening. A rubber first mating portion is provided on the edge, and a second rubber mating portion is provided on the second opening edge,
The open state is a state in which the first mating portion and the second mating portion are separated from each other, and the closed state is a state in which the mating surface of the first mating portion and the mating surface of the second mating portion are arranged. A molded bag for laminated glass, which is formed by being overlaid.   The molded bag for laminated glass according to claim 1, wherein the rubber constituting the first and second mating portions is made of EPDM and has a hardness of 40 to 70. Either one of the first opening edge and the second opening edge is provided with a winding piece capable of winding and covering the opening in the closed state, and a front end portion of the winding piece has a surface. One fastener member of the pair of fastener members forming the fastener is equipped,
The other one of the first opening edge and the second opening edge is equipped with the other fastener member that can be overlapped with the one fastener member of the wound piece that covers the opening in the closed state. The molded bag for laminated glasses according to claim 1 or 2.   Either one of the first mating portion and the second mating portion is formed with a step that is convex or recessed along the longitudinal direction of the mating surface, and the first mating portion and the first mating portion In the other of the two mating portions, a step is formed along the mating surface to be unevenly fitted to the step formed on the mating surface in a closed state where the mating surfaces are overlapped. Item 4. A molded bag for laminated glass according to any one of Items 1 to 3.   Either one of the first mating portion and the second mating portion is provided with a fitting portion that fits into the other tip portion of the first mating portion and the second mating portion in the closed state. The shaping | molding bag for laminated glasses as described in any one of Claims 1-3.

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