JP2018024558A - Molding bag for glass laminate - Google Patents

Abstract

An object of the present invention is to find out how to arrange a string-like body provided inside a molding bag through further intensive research, and to provide a molding bag for laminated glass that can be decompressed more quickly and has excellent productivity. SOLUTION: A molded bag for laminated glass having openings K that can be closed on three sides and a suction part 9 for decompressing the inside 1S of the bag is equipped on the bottom 1t of the bag. The bag bottom part 1t includes a main body sheet 4 made of rubber and a film sheet 5 made of fluorine resin provided on the inner surface of the main body sheet 4, and the bag bottom part 1t includes a main body bottom part 23, a bottom cover 6 covering it from the outside, A bottom space portion 25 in the bottom cover 6 and string-like bodies that pass through the main body bottom portion 23 and are arranged in the bottom space portion 25 on the left and right. It is configured to face the space 25 . [Selection drawing] Fig. 5

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, the molding bag is quickly put into the empty molding bag after the laminated glass is taken out after finishing the heating, suction, and pressurization steps of the unbonded glass plate placed in the molding bag. The next unbonded glass plate is placed and the same process is repeated. As described above, in order to use the forming bag repeatedly and efficiently, it is required that the pressure-reducing step inside the bag, which takes a relatively long time, can be performed quickly.

  As a technique for promoting the pressure reduction, for example, in Patent Document 1, as described in paragraph 0082 (see also FIG. 8), a ventilation spacer for preventing the flow of air to be deaerated is provided, and It has been suggested to provide a rope as an example of a ventilation spacer. That is, it is considered that placing a string-like body such as a rope as a ventilation spacer inside the molding bag is effective in reducing pressure quickly.

WO2010 / 073966

  The purpose of the present invention is to find out how to arrange the string-like body provided inside the molding bag through further earnest research, and to provide a molded bag for laminated glass that can be decompressed more quickly and has excellent productivity. is there.

The invention according to claim 1 has an opening K in which one or more of the four sides of the pair of bag main bodies 2 and 3 can be opened, and the opening K is opened and opened in a closed state. In the laminated bag for laminated glass, the suction portion 9 for decompressing the bag interior 1S formed by the pair of bag main bodies 2 and 3 is equipped on the bag bottom 1t.
The bag main bodies 2 and 3 are made of the rubber main body sheet 4 in which a synthetic resin film sheet 5 is superimposed on the inner surface of the main body sheet 4, and the bag bottom 1 t is a main body bottom formed by the bag main bodies 2 and 3. 23, a bottom cover 6 having a folded shape that covers the main body bottom 23 from the outside, and a bottom space 25 formed inside the bottom cover 6 by being surrounded by the bottom cover 6 and the main body bottom 23. And comprising
A string-like body 7 having a bottom rope 7A along the longitudinal direction of the bottom space 25 and side string-like bodies 7a and 7b penetrating both end portions of the main body bottom 23 is provided in the bottom space 25. ,
The opening 9 a in the bag interior 1 </ b> S in the suction part 9 is configured to face the bottom space part 25.

The invention according to claim 2 is the molded bag for laminated glass according to claim 1,
The main body bottom 23 is provided with an air hole 26 other than the insertion hole 27 for allowing the string-like body 7 to pass therethrough.

The invention according to claim 3 is the molded bag for laminated glass according to claim 1 or 2,
The string-like body 7 is provided in the bottom space 25 and a main body rope 7B having a pair of side string-like body portions 7a, 7b along the left and right edges with respect to the bag bottom portion 1t in the bag interior 1S. Comprising the bottom rope 7A,
The tip ends of the pair of side string-like body portions 7 a and 7 b are penetrated by the main body bottom portion 23.

The invention according to claim 4 is the molded bag for laminated glass according to claim 3,
The main body rope 7B is formed on the base of each of the pair of side string-like body parts 7a and 7b by a top string-like body part 7c arranged along the edge opposite to the bag bottom part 1t in the bag interior 1S. It is characterized by being comprised in the three-way rope by which an edge part is continued in series.

The invention according to claim 5 is the molded bag for laminated glass according to any one of claims 1 to 4,
The suction portion 9 and the string-like body 7 are arranged so as to be closely arranged so that there is almost no gap between the opening 9a and the string-like body 7.

  According to the invention of claim 1, a belt-like bottom space portion extending in the side direction of the bag bottom portion is provided between the main body bottom portion and the bottom cover at the bag bottom portion, and the string-like body is disposed in the bottom space portion. Has been. Therefore, the inside of the bag, which is the layout space for the laminated glass, that is, the size of the bag body is reduced in size for the bottom space, while the string-like body and the air passage therearound are secured when the bag is decompressed. It is possible to reduce the cost accordingly.

Since the opening part inside the bag of the suction part faces the bottom space part, there is also an advantage that the suction part can have a short length enough to face the bottom space part on the bag bottom side from the inside of the bag.
As a result, through further diligent research and ingenuity, we found out how to arrange the string-like body provided inside the molding bag and realized a reasonable arrangement state of the string-like body, so that the pressure can be reduced more quickly. Thus, a molded bag for laminated glass having excellent productivity can be provided.

  According to the invention of claim 2, since not only a plurality of insertion holes but also air holes are formed in the bottom of the main body, the air flow inside the bag is obstructed by the suction action from the opening. Does not occur or hardly occurs, and the air inside the bag can be smoothly decompressed through the bottom space.

  According to the invention of claim 3, the string-like body includes a bottom rope arranged at the bag bottom portion having the suction portion and a pair of side string-like body portions arranged at the left and right edges of the bag body. Since each side string-like body part passes through the bottom of the main body and reaches the bottom space part at the time of decompression using the suction part, the suction part in the four sides as a bag is provided on three sides. It becomes possible to suck out the air inside the bag efficiently and without leaving as much as possible from the near three sides. The efficient suction of air also has the advantage that the time required for decompression can be shortened compared to conventional products.

  According to the invention of claim 4, the main body rope has string-like bodies arranged in four directions as bags, and the side string-like body portions and the top string-like body portions are continuously integrated in series. Therefore, there is an advantage that the effect of the invention of claim 3 is further enhanced.

  According to the invention of claim 5, since the opening and the string-like body are arranged close to each other, it is possible to efficiently suck out the air in the path of the air around the string-like body from the suction part when the pressure inside the bag is reduced. There is an advantage that a better pressure reduction can be performed.

Front view of laminated glass forming bag The front view which shows the state which the bag for shaping | molding of FIG. 1 opened BB sectional view of FIG. 1 showing the structure of the bag bottom (A) is an action figure which shows closing operation of an opening part, (b) is the sectional view on the AA line of FIG. Sectional drawing which shows the structural example of the suction pipe part in a bag bottom part

  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 “molding bag”) 1 is a pair of bags in which only the bag bottom 1t, which is the long side of each root, is integrated. The bag main bodies 2 and 3 are configured, and the bag main bodies 2 and 3 are opened so as to be able to open and close almost all of the front end side long sides and both short side portions, that is, three sides.
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 composed of a main body sheet 4 made of an EPDM laminated cloth (ethylene propylene rubber laminated cloth) in which ethylene propylene rubber is laminated on both front and back surfaces of a polyester fiber cloth, and has a front rubber layer and a back rubber layer. And a film sheet 5 made of fluororesin that is pressure-bonded to the inner surface side of the film. Further, the outer surface of the bag bottom portion 1t of each of the bag bodies 2 and 3 made of a synthetic resin material having flexibility is covered with a folded bottom cover 6.

  A rope positioned in a substantially rectangular ring is formed inside the molding bag 1 by a plurality of loop-shaped cloths 8 integrated on the inner surface side of one bag body 2 which is the lower side when used as the molding bag 1. (An example of a string-like body) 7 is arranged. The rope 7 and the gap between the rope 7 and the film sheet 5 serve as air passages, and the pressure in the molding bag 1 using the suction pipe (an example of the suction portion) 9 is smoothly reduced. Yes. The rope 7 is preferably a twisted rope formed by twisting a plurality of single ropes.

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. 4, 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 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 4, 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. 4 (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. 4B, 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 pipe 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. 4B, if the first overlapped portion 10B and the second overlapped portion 11B are just in surface contact with each other to form the second seal portion, the airtightness can be further improved. 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.

  The bag bottom 1t of the forming bag 1 will be further described. As shown in FIG. 3, the bag bottom 1 t is surrounded by a main body bottom 23 formed by the bag main bodies 2 and 3, a folded bottom cover 6 that covers the main body bottom 23 from the outside, and the bottom cover 6 and the main body bottom 23. And a bottom space 25 formed inside the bottom cover 6. The bottom space 25 is a band-shaped space extending in the side direction of the bag bottom 1t (in the direction of arrow Z, see FIG. 1). FIG. 3 is drawn as a cross-sectional view through the insertion hole 27 through which the rope 7 is passed.

  As shown in FIGS. 3 and 5, the body bottom portion 23 is formed with a plurality of holes 26 and 27 arranged in the side direction (arrow Z direction) of the bag bottom portion 1 t. Of the substantially rectangular annular rope 7 composed of the straight bottom rope 7A and the U-shaped three-way rope 7B, the bottom rope 7A is disposed in the bottom space 25, and the end portions of the side rope portions 7a and 7b are a plurality of ropes. The hole 26, 27 faces the bottom space 25 through the insertion holes 27, 27 at both ends. The holes other than the insertion hole 27 are air holes 26 for communicating the bag interior 1 </ b> S with the bottom space 25.

  The rope 7 includes a bottom rope 7A and a three-way rope 7B mainly disposed in the bag main bodies 2 and 3. The bottom rope 7 </ b> A is a straight rope that is provided along the longitudinal direction of the bottom space portion 25 with a length almost the entire length thereof. The three-way rope 7B includes a pair of side rope portions (an example of a “side string-like body portion”) 7a and 7b along the left and right edges with respect to the bag bottom 1t in the bag interior 1S formed by the pair of bag bodies 2 and 3. This rope has a top rope portion (an example of a “top string-like body portion”) 7c along the edge opposite to the bottom portion 1t, and is arranged in a state of “U” shape in a plan view. Each side rope part 7a, 7b and the top rope part 7c are continuously connected in series. The distal end portions of the side rope portions 7a and 7b reach the bottom space portion 25 through insertion holes 27 formed in the left and right end portions of the main body bottom portion 23, respectively.

  As shown in FIG. 5, the suction pipe 9 is mounted on the bag bottom 1 t with the opening 9 a in the bag interior 1 </ b> S facing the bottom space 25. Then, the suction pipe 9 and the bottom rope 7A are arranged so as to be closely arranged so that there is almost no gap between the opening 9a and the string-like body 7. Specifically, the protruding length of the inner pipe portion 9A located in the bag interior 1S in the suction pipe 9 is set to a state where it just touches the bottom rope 7A arranged in the bottom space portion 25. It is done.

With such a configuration, at the time of decompression, the bag bottom 1t is not crushed (not crushed) between the opening 9a and the bottom rope 7A, an air passage is secured, and a smooth air suction state is obtained. Be able to. As shown in FIGS. 3 and 5, it is desirable that the rope ends of the bottom rope 7 </ b> A and the three-way rope 7 </ b> B are wound with a thread (Kevlar thread or the like) 24 for fraying prevention.

  On the bag bottom 1t, a bottom rope 7A is arranged in a belt-like bottom space 25 that is long on the left and right, and a passage of sucked air by the rope 7 can be secured during decompression of the bag interior 1S, but laminated glass (not shown) The inside of the bag 1S, that is, the size of the film sheet 5, can be reduced to the necessary minimum, which is advantageous in terms of cost. Since the left and right insertion holes 27 and one or a plurality of air holes 26 are formed in the main body bottom 23, the suction pipe 9 is short enough to allow the opening 9 a to face the bottom space 25. However, the air inside the bag 1S can be smoothly decompressed through the bottom space 25.

  The rope 7 is a plan view having a three-way rope 7B composed of side rope portions 7a, 7b and a top rope portion 7c arranged near the outer periphery of each of the four sides of the bag interior 1S by the bag bodies 2 and 3, and a bottom rope 7A. Since it is housed in a substantially rectangular shape, the air inside the bag 1 </ b> S can be efficiently and efficiently sucked out from all directions during decompression using the suction pipe 9. In addition, due to the efficient suction, there is an advantage that the time required for decompression can be shortened as compared with the conventional product.

[Another embodiment]
The present invention may be applied to the forming bag 1 having a structure in which the opening K is disposed only on one side opposite to the bag bottom 1t (three-way closing type).
The shape of the molding bag 1 can be various shapes such as a rectangle, a circle, an ellipse, or a triangle.

  The rope 7 may be configured such that the left and right side rope portions 7a and 7b and the bottom rope 7A are continuous to form a rectangular loop shape in plan view. In this case, a configuration may be adopted in which a knot for making the rope 7 into a loop shape is provided in the bottom rope 7A. In addition, the configuration in which the knot and the opening 9a of the suction pipe 9 are disposed close to each other may be employed, and by using the bulky knot, an air passage by the suction pipe 9 is effectively secured, and more Good pressure reduction can be performed.

1S bag interior 1t bag bottom 2,3 bag body 4 body sheet 5 film sheet 6 bottom cover 7 string-like body 7A bottom rope 7B body rope 7a, 7b side string-like body part 7c top string-like body part 9 suction part 9a opening part 23 body bottom 25 bottom space 26 air hole 27 insertion hole K opening

Claims (5)

One or more of the four sides of the pair of bag bodies have an opening that can be opened, and the opening is configured to be switchable between an open state in which it is opened and a closed state in which it is sealed. A molded bag for laminated glass equipped with a suction part for depressurizing the inside of the bag consisting of the bag body,
The bag body is composed of a rubber-made main body sheet in which a synthetic resin film sheet is stacked on the inner surface of the main body sheet. A folded bottom cover, and a bottom space formed inside the bottom cover by being surrounded by the bottom cover and the bottom of the main body,
A string-like body having a bottom rope along the longitudinal direction of the bottom space part and a side string-like body part penetrating both ends of the main body bottom part is provided in the bottom space part,
The laminated bag for laminated glass in which the opening part in the said bag in the said suction part is set as the structure which faces the said bottom space part. The molded bag for laminated glass according to claim 1, wherein an air hole other than an insertion hole for allowing the string-like body 7 to penetrate is provided in the bottom of the main body. The string-like body includes a main body rope having a pair of side string-like body portions along left and right edges with respect to the bag bottom portion inside the bag, and the bottom rope provided in the bottom space portion. And
The molded bag for laminated glass according to claim 1 or 2, wherein tip portions of the pair of side string-like body portions are penetrated through the bottom portion of the main body. The main body rope has a top string-like body portion arranged along the edge opposite to the bag bottom inside the bag, and a base end portion of each of the pair of side string-like body portions continuously and continuously. The molded bag for laminated glass according to claim 3, wherein the molded bag is a three-way rope. 5. The suction portion and the string-like body are arranged so as to be closely arranged so that there is almost no gap between the opening and the string-like body. A molded bag for laminated glass as described in 1.

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