JP5495552B2 - Press bonding method of curved plate using expander roll - Google Patents

Description

  The present invention relates to a method for press bonding a curved plate using an expander roll capable of pressing a plate such as a curved laminated glass having various bent round shapes.

  Conventionally, a curved rotating roll called an expander roll generates wrinkles or slack in a sheet in an intermediate process in which the sheet is taken out or wound up from a roll of sheet-like material such as wide paper or film. It is generally well-known as a tension roll that prevents this from occurring.

  On the other hand, a curved roll in which an adhesive sheet material such as a polyvinyl butyral film (also referred to as PVB film for short) is inserted between a plurality of curved glass plates, and the stacked laminated laminates are provided up and down in a heated state. The manufacturing method of the laminated glass which is pressed by the above and bonded by the adhesive sheet material is well known.

  In particular, window glass for automobiles has a three-dimensional shape that is curved in two directions, and it is necessary to degas bubbles between two stacked glass plates and to adhere both surfaces of the glass plates so that no air remains. Therefore, it is necessary to devise a uniform pressing force of the roll to be pressed. For this reason, it has been necessary to adjust and match the curved shape of the roll that presses the glass plate each time the shape of the curved glass plate is changed.

  For example, as a device that presses and presses glass plates to bond them together, Japanese Patent Publication No. 3-21494 discloses a pair of flexibility in which at least a curved portion is hollow and a helical body is inserted. A bending roll apparatus including a roll and a plurality of backup rolls that regulate relative positions of the respective parts of the flexible roll is disclosed (Patent Document 1).

  In addition, as an example of an expander roll, Japanese Patent Publication No. 63-28149 discloses a sag during conveyance of a continuous wide sheet-like material such as paper, film, cellophane, etc. An expander roll curved in an arcuate shape used to prevent sagging is described (Patent Document 2).

Furthermore, similarly as an example of the curved roll, JP-T-2006-527335 discloses an expander roll, the expander roll having a tubular-shaped roll mantle (2) that can be adjusted in the curvature, The roll mantle is made of a reinforced synthetic composite material as an undivided tube and is supported on a non-rotatable central region via a bearing (13). In the expander roll, the central region is the bendable shaft (1), and the bearing (13) is on the outer surface of the bearing, on the roll mantle (2), or on the inner surface of the roll mantle. Adjacent to the inner surface of the outer annular sleeve (3) that is firmly adjacent to the side surface and with the inner surface of the bearing, the bendable shaft (1) or the curve On the surface of the inner annular sleeve to firmly surrounds the ability axis (4), it is adjacent, are described expander roll, characterized in that (Patent Document 3).
Japanese Patent Publication No. 3-21494 Japanese Patent Publication No. 63-28149 JP-T-2006-527335

  The invention described in Patent Document 1 is a conventional method of bonding curved glass plates to each other by pressure bonding, and a pair of hollow rubber rolls are bent into a curved shape by a plurality of press rolls, and the roll end portions thereof. Is connected to the drive motor and rotated, the film intervening glass plate passes between the rolls from one end and squeezes the internal air. Since it depends on the relative positional relationship with the presser roll, there is a problem in the length of the adjustment time and the reproducibility of the shape. In addition, since the presser rolls are intermittently present, the pressurizing force applied to the glass plate surface is uneven at the place where the presser roll is in contact with the glass plate surface and the portion where it is not in contact with the glass plate surface. There was a problem that the pressure could not be applied and distortion occurred.

  On the other hand, with respect to the expander roll described in Patent Document 2, only one curved roll is disposed on the conveying path of a wide continuous sheet-like material, and tension is applied so that the sheet-like material in the middle of conveyance is not loosened. Because it is a roll with a structure that rotates only the outer peripheral surface of a curved roll that is made for the purpose of correcting it, even if it is sandwiched between two expander rolls from both the top and bottom sides of a curved laminate such as a curved laminated glass There is a problem in that it is not possible to obtain a pressing force that uniformly presses and bonds the curved glass plates together.

  Moreover, about the expander roll described in the said patent document 3, there exists description that the inner side annular sleeve 4 provided between the inner surface of the bearing 13 and the axis | shaft 1 is larger than the width | variety of the bearing 13 to which it belongs. However, as seen from the drawings of the embodiment, the width is approximately the width of the bearing, the bearing may be displaced along the shaft 1, and between the inner wall of the roll mantle 2 and the outer surface of the bearing 13. Although there is a description that the outer annular sleeve 3 provided is larger than the width of the bearing 13 to which it belongs, the width of the outer annular sleeve 3 is about the width of the bearing as far as the drawings of the embodiment are concerned. When two glass plates sandwiched by 2 are pressed and bonded, there is a problem that the glass surface cannot be pressed and clamped with a uniform pressing force.

  In the present invention, in view of such problems, even when a laminated body having an intermediate film interposed between a plurality of curved plate-like bodies is bonded by pressing, the curvature of the curved laminated body is greatly changed. An object is to easily change and adjust the curvature of the curved roll without replacing the curved roll, and to press the curved roll with equal pressing force from both sides of the laminate.

That is, the present invention relates to a press bonding method in which a curved plate-like body laminated via a resin intermediate film is press-bonded from both sides, and an expander roll having a rotatable outer roll layer around a curved fixed shaft shaft portion is provided. A press bonding method in which a pair of upper and lower press rolls are arranged, and the curved plate-shaped body is press-bonded while the curved plate-shaped body is conveyed and passed between the pair of press rolls. An arcuate metal fixed shaft shaft provided with straight portions at both ends, and a bearing and a cylindrical spacer are alternately arranged on the outer peripheral surface of the fixed shaft shaft so as to circumscribe, and circumscribe each of the bearings. A cylindrical member that is wider and rigid than the outer peripheral surface width of the cylindrical member is continuously provided without interruption, and the outer shell is used as a flexible resin layer that covers the outer peripheral surface of the plurality of cylindrical members. It is a press bonding method of the curved plate-like body with expander roll according to claim 1, characterized by being provided Le layer.

  Alternatively, in the present invention, the outer roll member is a flexible resin having a hardness of 65 ° to 80 ° based on a hardness test of JIS_K6253 type A. It is a press bonding method of a plate-like body.

  If the curved plate-like press bonding method using the expander roll of the present invention is used, in the manufacturing process of the curved laminated glass plate, even when changing the type of the curved glass plate manufactured with different curvatures, Easy to change from flat plate to glass plate with a wide range of curvatures by simply adjusting the rotation angle of the fixed shaft shaft of the curved press roll without changing the curved roll. Can be changed.

  Moreover, this makes the pressing force from both sides of the glass plate equal to the glass plate surface, and it can be pressed from both sides of the glass plate without leaving bubbles between the glass plates and without damaging the glass plate. .

  As shown in FIG. 1, the present invention sandwiches a curved laminated plate G that is overlapped via a resin film such as a polyvinyl butyral resin film (abbreviated as PVB film) by a pair of press rolls 10 from both sides. This is a press bonding method for bonding.

  That is, for pressing and bonding the curved plate-like body G in which the expander roll 15 provided on the outer peripheral portion of the fixed shaft shaft 11 curved in an arcuate shape is rotatable with the PVB film interposed therebetween. Used as a roll, a pair of curved laminated plate-like bodies G are disposed on both upper and lower surfaces, and the laminated curved plate-like bodies G are bonded between the pair of press rolls 10 by a press press while being passed through.

  The press roll 10 has an arcuate shape in which most of the intermediate part in the longitudinal direction is arcuate and the straight line parts at both ends of the arcuate part are the same axis, and each cross-sectional shape of the arcuate part and straight line part is circular. It is what. The press roll 10 is provided with a rigid, metal fixed shaft shaft 11 as a central shaft portion, and bearings 12, 12,... And cylindrical spacers 13, 13,. Further, the outer peripheral surface of the rotating portion on the outer peripheral side of each of the bearings 12, 12,... Is wider and rigid than the outer peripheral surface width of each bearing 12, 12,. Are arranged in series so that the cylindrical members 14, 14,... Arranged in a row are in continuous contact with each other, and are arranged on the entire outer peripheral surface of the cylindrical members 14, 14,. Was coated with a flexible and hard rubber layer as a jacket roll layer 15.

  With such a configuration, the expander roll 10 includes the cylindrical members 14, 14,... Fixed to the outer peripheral portions of the bearings 12, 12,. The outer peripheral portion of the fixed shaft 11 can be freely rotated by rolling with the balls 12.

  Further, the fixed shaft shaft 11 of the curved press roll 10 has a rotatable structure, but when the laminated body is conveyed and pressed, the fixed shaft shaft 11 itself is used in a fixed state, and the outer roll member 15 is used. Can be conveyed while pressing the laminated plate-like body G.

  The outer roll member 15 and the cylindrical members 14, 14,... Are rotated by a drive motor (not shown), and either one of the upper and lower curved press rolls 10 is pressed by a cylinder (not shown) to be held between the curved plates. It presses while conveying the state G.

  In addition, a pressing cylinder (not shown) is provided on either one of the curved press rolls 10, 10, and presses the glass plate G passing between the curved press rolls 10, 10.

  The curved press roll 10 is provided with a cylindrical member 14 wider and rigid than the bearing width on the outer periphery of the bearing 12, and the cylindrical member 14 is continuously connected in series without a gap. A portion having a strong pressing force acting on a portion of the cylindrical member on the outer peripheral portion of the bearing when pressed to the laminated plate-like body G, and a portion having a weak pressing force in a portion where the cylindrical member is interrupted by a wide gap portion between the bearings There is no pressing unevenness.

  Next, by rotating and adjusting the fixed shaft shafts 11 and 11 of the pair of curved press rolls 10 and 10, the curved press roll 10 is adjusted by adjusting the direction angle at which the convex surface of the curved press roll 10 faces. A method of changing the angle adjustment in the direction of the curved surface that can be applied to various curved laminated glass sheets G having different curvatures without replacement will be described.

  By adjusting the angle in the curved surface direction of the pair of upper and lower curved press rolls 10, 10, the fixed shaft shafts 11, 11 of the curved press rolls 10, 10 are rotated as shown in FIG. If it carries out, it can clamp and press a flat laminated glass plate.

Further, as shown in FIG. 1A, when the angle is adjusted by rotating the convex surfaces of the fixed shaft shafts 11 and 11 of the curved press rolls 10 and 10 so as to face downward, the lower surface side becomes a convex surface. Can sandwich and press the curved laminated glass plate,
Furthermore, although not shown, when the angle adjustment is performed by rotating the convex surfaces of the fixed shaft shafts 11 and 11 of the curved press rolls 10 and 10 so as to face upward, the laminated glass is curved so that the upper surface becomes a convex surface. The plate can be sandwiched and pressed.

  In this way, by adjusting the orientation angle of the convex surfaces of the fixed shaft shafts 11 and 11 of the pair of curved press rolls 10 and 10 from the horizontal direction (0 degrees) to the downward direction (90 degrees), the flat surface is flat. A laminated glass plate and a laminated plate-like body having various curvatures from a convex surface direction on the upper surface side to a convex surface direction on the lower surface side are sandwiched by a pair of curved press rolls 10 and 10 and pressed. The plate-like bodies G and G such as laminated glass plates can be bonded together by being conveyed.

  The outer roll member 15 is preferably a flexible resin having a rubber hardness of 65 ° to 80 ° based on a hardness test of JIS_K6253 type A. When the hardness is less than 65 °, the outer roll member 15 sandwiches the laminated plate G. When pressing and bonding, the jacket roll member 15 is greatly deformed by elasticity, and a sufficient pressing force cannot be obtained for the laminated plate-like body G.

  On the other hand, if the rubber hardness exceeds 80 °, the elastic force is too low and the glass plate may be damaged when a plate-like body such as a glass plate is pressed. As a result of the experiment, when the hardness of the jacket roll member 15 is set to 65 ° to 80 °, both the laminated glass can be sandwiched and a sufficient pressing force against the laminated glass and an elastic force that does not damage the glass plate can be secured. This is desirable because it is known.

  The outer roll member 15 is preferably a synthetic rubber of nitrile rubber (NBR) having antifouling properties, but is not limited thereto as long as it satisfies the above conditions.

  The cylindrical spacers 13, 13,... Are arranged on the sides of the bearings 12, 12,... Circumscribed by the fixed shaft shaft 11, and the respective bearings 12, 12 are arranged by the cylindrical spacers 13, 13,. ,... Can be prevented, and the positions of the bearings 12, 12,.

  Since the plate-like body must be sandwiched and pressed by the pair of envelope roll members 15 and 15 curved in the above-mentioned arcuate shape, the surface envelope roll members 15 and 15 are made of a material having a certain degree of hardness. There is a need. On the other hand, each time the bearing 12 is rotated once with the curved fixed shaft 11 as the rotation axis, tensile deformation is repeated on the convex surface side of the arc-shaped portion and contraction deformation is repeated on the concave surface side of the arc-shaped portion. Therefore, a flexible resin such as synthetic rubber having a hardness of 65 ° to 80 ° is desirable.

  Further, the fixed shaft shaft 11 bent into the arcuate shape is in a stopped state without rotating when passing through the curved plate-like body, and both ends are fixed. A pair of fixed shaft shafts 11 are arranged side by side, and each of the pair of fixed shaft shafts 11 and 11 is disposed so that the respective arcuate convex surface sides are in the same direction. It is necessary to have such a length as to sandwich and pass curved window glass for automobiles and vehicles, and flat window glass for construction.

  Furthermore, the bending direction adjusting means (not shown) rotates the fixed shaft shaft 11 so as to have a desired angle in a range of ± 90 degrees around the axis of the arc-shaped fixed shaft shaft 11 as a rotation center. The position of the convex portion at the intermediate portion of the fixed shaft shaft 11 can be adjusted at a desired angle from directly above to directly below, and the curved glass plate having various curvatures can be dealt with just by rotating the fixed shaft shaft halfway.

  Further, the curved laminated glass sheet G is pressed by pressing the curved press roll 10 that can be raised and lowered on one side against the curved press roll 10 on the other side by a pressing means such as a pressing cylinder (not shown). Adhere each other.

  Pressing of the curved press roll 10 by the pressing cylinder (not shown) raises and lowers the curved press roll 10 by pressing bearing portions (not shown) at both ends of the fixed shaft shaft 11. And / or the curved press roll 10 on the lower side, or both can be raised and lowered.

  Next, a curved press roll used in a method for press bonding a curved plate using the expander roll of the present invention will be described.

  The curved press rolls 10 and 10 have a circular arc-shaped portion at the center and a straight arcuate shape at both ends. The curved press rolls 10 and 10 have a linear shape of the arc-shaped fixed shaft shaft 11 by a bending direction adjusting means (not shown). The gap shape between the pair of upper and lower curved press rolls 10 and 10 seen from the horizontal direction for carrying in the glass plate is linear when viewed from the horizontal direction, by simply rotating within the range of ± 90 degrees with the part as the axis. Only by slightly rotating the arc-shaped fixed shaft shafts 11, 11 from a convex radius on the upper side to a convex radius on the lower side, the round shape of the curved press roll 10 on the fixed shaft shaft 11 is minimized. This is because the radius can be adjusted to various arc shapes.

  Furthermore, as shown in FIG. 2, the outer peripheral surfaces of a plurality of bearings 12, 12,... Circumscribed at a constant pitch to the outer peripheral surface of an arcuate fixed shaft shaft 11 fixed as a core material of the curved press roll 10. The wide rigid cylindrical members 14, 14,... Are provided by pressing the surfaces of the plate-like bodies uniformly when bonding the plate-like bodies of the curved laminated plate-like bodies together. This is to prevent the occurrence of perspective distortion by preventing variations in the pressure distribution on the PVB film surface between the plates.

  Conventionally, an expander roll is used for an application that does not cause wrinkles on a sheet-like material such as paper or film. Therefore, an expander roll is used to bond plate-like bodies of curved laminated plate-like bodies G such as curved laminated glass. If it is necessary to sandwich the curved laminated plate from both sides and press it with a strong pressing force, the pressing force becomes uneven.

  For example, when bearings 12, 12,... Are arranged at regular intervals on the outer periphery of the curved fixed shaft shaft 11, and further, flexible rubber is coated on the entire circumference, the pressure distribution applied to the glass plate surface Are strong at the contact portion of the bearings 12, 12,..., And weak at the gap positions between the bearings 12, 12,. Are pressed between the positions of the outer rolls 15 and 15 corresponding to the contact portions of the outer peripheral rolls 12 and 12, and the positions of the outer rolls 15 and 15 corresponding to the gap positions between the adjacent bearings 12, 12,. Large and small unevenness occurs in the pressure distribution, and perspective distortion occurs in the portion.

  On the other hand, a cylindrical member having a wide rigidity on the outer peripheral surface of a plurality of bearings 12, 12,... Circumscribed at a constant pitch on the outer peripheral surface of an arcuate fixed shaft shaft 11 fixed as a core material of the curved press roll. When the curved laminated plate-like body is pressed and bonded by sandwiching it with the curved press rolls 10 and 10 provided so as to be adjacent to each other, the vicinity of the positions of the bearings 12, 12,. , 12,..., There is no uneven adhesion between the intermediate positions, and a pressing force can be applied to the entire surface of the plate-like body almost uniformly and without unevenness.

  That is, when the cylindrical member 14 having a wide rigidity is not provided, the two glass plates sandwiching the intermediate film are sandwiched between the pair of curved press rolls 10 and 10, and the bearings 12, 12,. A strong pressing force is applied only to a part of the glass plate surface corresponding to the outer peripheral portion, and a strong portion is applied to the portion of the glass plate surface corresponding to the intermediate position between the bearings 12, 12,. This is because the pressing force is not given, and the pressing force is uneven as a whole.

  Further, the cylindrical spacers 13, 13,... Are arranged on the outer peripheral surface circumscribing the fixed shaft shaft 11 between the bearings 12, 12,. In order to prevent the position from shifting to the left and right, and to maintain the positions of the bearings 12, 12,.

  Subsequently, an example of a method of press bonding a curved plate using the expander roll of the present invention will be described.

Example 1
It is an Example in the case of press-bonding a curved laminated glass sheet G having a curved curved surface and a concave curved surface on the upper surface side among the curved laminated sheet G having a linear conveyance direction and a perpendicular width direction.

  A curved convex surface portion of each of the fixed shaft shafts 11 and 11 of the pair of bow-shaped curved press rolls 10 and 10 is set in advance so as to be inclined downward by 45 degrees, for example, as shown in FIG. The gap seen from the horizontal direction on the carry-in side of the glass plate G between the press rolls 10, 10 is set to an angle that becomes the horizontal direction with the upper surface side being a concave arc shape, and the curved press roll 10 seen from the horizontal direction, The gap between 10 becomes an arc shape whose upper surface side is concave. The outer roll member of the curved press roll was made of nitrile rubber and had a hardness of 75.

Example 2
As shown in FIG. 1B, this is an example in which a laminated glass plate having a flat shape can be pressed and bonded. Each of the fixed shaft shafts 11 and 11 of the pair of arcuate curved press rolls 10 and 10 is previously stopped from rotating at a predetermined angle, and the curved convex surface portion of each of the fixed shaft shafts 11 and 11 is an angle in the horizontal direction. And the gap between the curved press rolls 10 and 10 viewed from the horizontal direction was linear in the horizontal direction.

  The gap between the pair of curved press rolls 10 and 10 is set to be narrower than the total thickness of the two glass plates sandwiching the intermediate film, but if it is narrower than the thickness of the two glass plates, The glass plates are pressed by the curved press rolls 10 and 10 from both sides with uniform pressure.

  In this way, the radius of the gap between the pair of curved press rolls 10 and 10 can be made linear by simply rotating the pair of arcuate fixed shaft shafts 11 and 11 little by little by a bending direction adjusting means (not shown). Within the range of the radius of the curved press roll 10 of the fixed shaft shaft 11, various round shapes having a convex shape on the upper surface side and a convex shape on the lower surface side can be adjusted.

a) is a perspective view of an embodiment of the method for press bonding a curved plate of the present invention, and b) is a perspective view of an embodiment of the method for press bonding a flat laminated glass plate. Sectional drawing of the curved press roll used with the press bonding method of the curved plate-shaped body of this invention.

Explanation of symbols

G Curved laminated plate 10 Curved press roll 11 Fixed shaft shaft 12 Bearing 13 Cylindrical spacer 14 Rigid cylindrical member 15 Cover roll member

Claims (2)

In a press bonding method in which a curved plate-like body laminated via a resin interlayer is press bonded from both sides, a pair of upper and lower expander rolls with a rotatable outer roll layer around the curved fixed shaft shaft is used as press rolls. A press bonding method in which the curved plate-like body is press-bonded while the curved plate-like body is conveyed and passed between the pair of press rolls , and the expander roll has an arcuate middle portion and straight portions at both ends thereof. An arcuate metal fixed shaft shaft, and bearings and cylindrical spacers are alternately arranged on the outer peripheral surface of the fixed shaft shaft to be in contact with each other. A wide and rigid cylindrical member is continuously provided without interruption, and an outer roll layer is provided as a flexible resin layer covering the outer peripheral surface of the plurality of cylindrical members. Press bonding method of the curved plate-shaped body using the expander rolls, characterized in.   2. The curved plate-like body using an expander roll according to claim 1, wherein the outer roll member is a flexible resin having a hardness of 65 ° to 80 ° based on a hardness test of JIS_K6253 type A. Press bonding method.