JP5014361B2 - Polarizing plate bonding method and apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and apparatus for bonding a polarizing plate simultaneously on both sides of a substrate. <P>SOLUTION: The substrate is transported, a first film piece having a polarizing plate is bonded to corresponding one side of the substrate, the transported substrate is changed to a direction orthogonal to the transport direction and transported, and a second film piece having a polarizing plate is bonded to a surface opposite to the surface where the first film piece of the substrate is bonded. The transmission axis direction of the polarizing plate of the second film piece is orthogonal to the transmission axis direction of the polarizing plate of the first film piece when the tacky surface side of the polarizing plate and the tacky surface side of the first film piece are bonded. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a polarizing plate bonding method and apparatus for bonding a polarizing plate to a substrate.

  With the widespread use of liquid crystal display devices (hereinafter referred to as LCDs), the demand for polarizing plates is rapidly increasing. In the polarizing film, a protective film is generally bonded to both surfaces or one surface of a polarizing layer having polarizing ability (see FIG. 12B). As a material for the polarizing layer, polyvinyl alcohol (hereinafter referred to as PVA) is mainly used. After the PVA film is uniaxially stretched, it is dyed with iodine or a dichroic dye or dyed, and then stretched. A polarizing film for a polarizing layer is formed by crosslinking with a compound. As the protective film, cellulose triacetate (hereinafter referred to as TAC) is mainly used because it is optically transparent and has a small birefringence. Since the polarizing plate is usually stretched in the longitudinal direction, the absorption axis of the polarizing film is substantially parallel to the longitudinal direction (see FIG. 12A). The polarizing plate film is provided with an adhesive layer for bonding onto the substrate, and a release film for protecting the adhesive layer from foreign matters such as dust is bonded thereon. The polarizing film to which the release film is bonded is supplied in the form of a roll of a strip-like film stretched in the longitudinal direction.

  A conventional LCD using TN (Twisted Nematic) liquid crystal has a polarizing plate bonded to both sides of the substrate, and one side of the polarizing plate is vertically or horizontally oriented on the screen. A first polarizing plate having a transmission axis inclined by 45 ° is disposed, and a second polarizing plate having a transmission axis inclined in a direction orthogonal to the transmission axis of the first polarizing plate is disposed on the other surface. The For this reason, a method in which polarizing plate chips in which roll-type polarizing plates are punched in advance in a direction of 45 ° with respect to the longitudinal direction of the roll are bonded to both surfaces of the LCD one by one with the transmission axis direction aligned (for example, Japanese Patent Laid-Open No. 2002-2002 No. 23151) and a method of cutting a polarizing plate after laminating a polarizing plate in a roll form with the vertical or horizontal direction of the LCD screen inclined by 45 ° with respect to the longitudinal direction of the roll (for example, JP-A-11-95028, 12A) has been devised. Also, in LCDs using VA (Vertical Alignment) liquid crystal and IPS (In Plane Switching) type liquid crystal, the transmission axis of the polarizing plate is arranged in the vertical or horizontal direction of the screen, Each sheet is attached to the LCD.

JP 2002-23151 A Japanese Patent Laid-Open No. 11-95028

  However, in the case of the method of laminating the polarizing plate chip to the LCD one by one, when laminating the polarizing plate chip to the substrate, the polarizing plate chip is transferred and separated one by one immediately before the laminating. Since it is necessary to peel off the film, there is a limit to shortening the process time. Further, since the polarizing plate chip is usually punched from a roll-shaped polarizing plate film, curling is likely to occur, and workability when transferring and transporting the polarizing plate is poor. Furthermore, when polarizing plate chips are bonded to the LCD one by one, one side of the LCD is often adsorbed and supported, so the direction of the transmission axis of the polarizing plate to be bonded to both sides is matched. It is difficult to paste a polarizing plate chip on both sides simultaneously.

  Further, in the method of cutting the polarizing plate after laminating the polarizing plate by tilting the vertical or horizontal direction of the LCD screen by 45 ° with respect to the longitudinal direction of the roll, there are many unusable portions near the end of the roll. In particular, when a large-size polarizing plate is used with an increase in the screen size of the LCD, there is a problem that the yield is reduced. Moreover, since the piece of the polarizing plate which was not used for pasting is used in combination with a plurality of materials, it is difficult to reuse, resulting in an increase in waste. Such a problem is a common problem also in the case of the method of bonding the polarizing plate chips one by one to the LCD. In addition, when laminating the polarizing plate with the vertical or horizontal direction of the LCD screen inclined by 45 ° with respect to the roll longitudinal direction, a carrier for keeping the LCD angle constant is required. It is difficult to continuously and simultaneously paste the polarizing plate on both sides. In addition, even when pasting one side of the substrate and then pasting the opposite side, it is necessary to adjust the angle when transferring from the first carrier to the second carrier, so it is automated. Even complicated mechanisms are required.

  By the way, for the purpose of optical compensation such as coloring prevention and widening of the viewing angle, the retardation film is used by being adhered to a polarizing plate or the like forming an LCD, and the alignment axis is set at various angles with respect to the transmission axis of the polarizing plate. It is required to set. Conventionally, from a vertically or laterally uniaxially stretched film (for example, PET), a method is used in which the periphery is punched and cut so that the orientation axis has a predetermined inclination angle with respect to the side. A decrease in yield has been a problem.

  The 1st objective of this invention is providing the polarizing plate bonding method and apparatus which can bond a polarizing plate on both surfaces of a board | substrate simultaneously.

  The second object of the present invention is to provide a polarizing plate laminating method and apparatus with high work efficiency.

  The third object of the present invention is to provide a polarizing plate laminating method and apparatus having a high polarizing plate yield.

  The fourth object of the present invention is to provide a polarizing plate laminating method and apparatus having a high yield of a composite film obtained by laminating a retardation film and a polarizing plate.

In the 1st viewpoint of this invention, it is a polarizing plate bonding apparatus which bonds a polarizing plate to a board | substrate, Comprising: The 1st conveyance means which makes one end surface of a board | substrate orthogonally cross with respect to a advancing direction, and conveys the said board | substrate. And the adhesive surface of the first film piece having the polarizing plate, so that the cut surface of the first film piece is parallel to the end surface on the traveling direction side of the substrate conveyed by the first conveying means, A first laminating means for laminating on a corresponding plate surface one side of the substrate, and the substrate conveyed by the first conveying means in a direction orthogonal to the conveying direction of the first conveying means The first conveying unit having the polarizing plate and the transmission axis direction of the polarizing plate is aligned with the bonding surface side of the polarizing plate and the bonding surface side of the first film piece. Orthogonal to the transmission axis direction of the polarizing plate of the film piece, and the second The adhesive surface of the second piece of film supplied from the plate face of the opposite side of the first piece of film is pasted the surface of the substrate conveyed by feeding means, disconnection of the second piece of film On the plate surface opposite to the surface on which the corresponding first film piece of the substrate is bonded so that the surface is parallel to the end surface on the traveling direction side of the substrate conveyed by the second conveying means. A second bonding means for bonding , wherein the cut surface of the first film piece is a cut surface obtained by cutting the first belt-like film, and the cut surface of the second film piece is the first It is the cut surface which cut | disconnected the strip | belt-shaped film of 2, It is characterized by the above-mentioned.

  In the 2nd viewpoint of this invention, it is a polarizing plate bonding apparatus which bonds a polarizing plate to a board | substrate, Comprising: The 1st conveyance means which conveys the said board | substrate by making one end surface of a board | substrate orthogonal to a advancing direction And the adhesion surface of the first strip film having a polarizing plate is parallel to the end surface on the traveling direction side of the substrate transported by the first transport means, so that the travel direction of the first strip film is The first cutting means that cuts in parallel with the end face on the front side in the transport direction of the substrate bonded to the corresponding plate surface one side or the end face on the rear side thereof, and has been transported by the first transport means The second transport means for transporting the substrate in a direction orthogonal to the transport direction of the first transport means, and a polarizing plate, and the transmission axis direction of the polarizing plate is the adhesive surface side of the polarizing plate and the first When combined with the adhesive side of film piece 1 Of the first film piece perpendicular to the transmission axis direction of the polarizing plate and opposite to the surface of the substrate on which the film piece of the first belt-like film is bonded by the second conveying means. An adhesive surface of the second belt-shaped film supplied from the side plate surface side, an end surface on the traveling direction side of the substrate on which the cut surface of the second belt-shaped film is transported on the line of the second transport means; The end surface on the front side in the transport direction of the substrate bonded to the plate surface opposite to the surface on which the film pieces of the corresponding first band-shaped film are bonded so as to be parallel or the end surface on the rear side thereof And a second cutting means for cutting in parallel.

In the 3rd viewpoint of this invention, it is a polarizing plate bonding method which bonds a polarizing plate to a board | substrate, Comprising: The process of making the one end surface of a board | substrate orthogonal to a advancing direction, and conveying the said board | substrate, and a polarizing plate The bonding surface of the first film piece having the above is bonded to the corresponding plate surface one side of the substrate so that the cut surface of the first film piece is parallel to the front end surface in the substrate transport direction. A process, a process of transporting the substrate that has been transported in a direction orthogonal to the transport direction, a polarizing plate, and a transmission axis direction of the polarizing plate on the adhesive surface side of the polarizing plate The first film piece of the substrate that is orthogonal to the transmission axis direction of the polarizing plate of the first film piece when the first film piece is bonded to the bonding surface side is bonded. Of the second film piece supplied from the opposite side of the plate surface The surface, as the cut surface of the second piece of film is parallel to the end face of the front side in the transport direction of the substrate, opposite to the corresponding first piece of film is pasted the surface of the substrate viewed contains a step of bonding the plate surface, and the cutting face of the first piece of film is a cut surface obtained by cutting the first strip film, the cut surface of the second piece of film, the second It is the cut surface which cut | disconnected this strip | belt-shaped film .

  In the 4th viewpoint of this invention, it is a polarizing plate bonding method which bonds a polarizing plate to a board | substrate, Comprising: The process of making the one end surface of a board | substrate orthogonally cross with respect to a advancing direction, and conveying the said board | substrate, and a polarizing plate The adhesive surface of the first belt-shaped film having the above is bonded to the corresponding plate surface one side so that the traveling direction of the first belt-shaped film is parallel to the front end surface in the transport direction of the substrate. A step of cutting in parallel with an end face on the front side in the transport direction of the substrate or an end face on the rear side thereof; a second transport step of transporting the substrate that has been transported in a direction orthogonal to the transport direction; The polarizing plate has a polarizing plate and the transmission axis direction of the polarizing plate is aligned with the adhesive surface side of the polarizing plate and the adhesive surface side of the first film piece. Orthogonal to the axial direction and the first of the substrate The adhesive surface of the second belt-like film supplied from the plate surface side opposite to the surface on which the film pieces of the film-like film are bonded is the front side in the transport direction of the substrate. The end surface on the front side in the transport direction of the substrate bonded to the plate surface opposite to the surface on which the film piece of the corresponding first strip film is bonded so as to be parallel to the end surface of the substrate, or the rear thereof And a step of cutting in parallel with the end face on the side.

  According to the present invention, the polarizing plate can be continuously and automatically bonded to both surfaces of the substrate.

  Moreover, according to this invention, it is not necessary to transfer a film piece, and since the peeling film is not cut | disconnected, it can speed up.

  Further, according to the present invention, since no unnecessary piece of polarizing plate is produced, a yield of 100% can be realized. As a result, the cost of the display device can be reduced.

  Moreover, according to this invention, when sticking a polarizing plate on both surfaces of the board | substrate for TN liquid crystals, management of the transmission-axis direction of a polarizing plate becomes easy.

  In addition, according to the present invention, the circularly polarizing plate film obtained by laminating the retardation film and the polarizing plate can be continuously pasted to the substrate, and the cut piece of the unnecessary circularly polarizing plate film does not come out. The yield of the circularly polarizing film can be 100%.

  Moreover, according to this invention, when bonding a polarizing plate on both surfaces of a board | substrate simultaneously, apparatus equipment can be made small.

  Moreover, according to this invention, while supplying a film piece from the downward side of the board | substrate conveyed, and half-cutting from the lower side surface of a strip | belt-shaped film, mixing of refuse can be prevented. Since the belt-like film is supplied from the lower side of the substrate to be transported, the roll of the belt-like film can be easily exchanged.

It is the side view which showed typically the structure of the polarizing plate bonding apparatus which concerns on Embodiment 1 of this invention. It is (A) top view and (B) sectional drawing which showed the structure of the strip | belt-shaped film used in the polarizing plate bonding apparatus which concerns on Embodiment 1 of this invention. It is the expansion | deployment perspective view which showed typically the relationship between the extending | stretching direction of the polarizing plate bonded on both surfaces of a board | substrate by the polarizing plate bonding apparatus which concerns on Embodiment 1 of this invention, and a board | substrate. It is the side view which showed typically the structure of the polarizing plate bonding apparatus which concerns on Embodiment 2 of this invention. It is the expansion | deployment perspective view which showed typically the relationship between the extending | stretching direction of the polarizing plate bonded on both surfaces of a board | substrate by the polarizing plate bonding apparatus which concerns on Embodiment 1 of this invention, and a board | substrate. It is the perspective view which showed typically the structure of the polarizing plate bonding apparatus which concerns on Embodiment 3 of this invention. It is the top view which showed typically the structure of the polarizing plate bonding apparatus which concerns on Embodiment 3 of this invention. It is the side view which showed typically the structure of the 1st conveyance part of the polarizing plate bonding apparatus which concerns on Embodiment 3 of this invention. It is the side view which showed typically the structure of the 2nd conveyance part of the polarizing plate bonding apparatus which concerns on Embodiment 3 of this invention. It is the side view which showed typically the structure of the 1st conveyance part of the polarizing plate bonding apparatus which concerns on Embodiment 4 of this invention. It is the side view which showed typically the structure of the 2nd conveyance part of the polarizing plate bonding apparatus which concerns on Embodiment 4 of this invention. It is the top view and sectional drawing which showed the structure of the strip | belt-shaped film used in the conventional polarizing plate bonding apparatus.

  Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a side view schematically showing a configuration of a polarizing plate bonding apparatus according to Embodiment 1 of the present invention. FIG. 2: is the (A) top view and (B) sectional drawing which showed the structure of the strip | belt-shaped film used in the polarizing plate bonding apparatus which concerns on Embodiment 1 of this invention. FIG. 3 is a developed perspective view schematically showing the relationship between the stretching direction of the polarizing plate bonded to both surfaces of the substrate by the polarizing plate bonding apparatus according to Embodiment 1 of the present invention and the substrate.

  In the polarizing plate bonding apparatus 30 according to Embodiment 1, referring to FIG. 1, the release film 11 </ b> A is bonded onto the polarizing plate via an adhesive layer, and the front surface side of the substrate 1 to be conveyed. When the cut surface on the traveling direction side orthogonal to the longitudinal direction of the first belt-like film 10A supplied from the head advances to a length corresponding to the substrate 1, the first belt-like film 10A is removed from the release film 11A. The first cutting means 31A that cuts at least the polarizing plate and the adhesive layer in a direction orthogonal to the longitudinal direction, and the release film 11B is stuck on the polarizing plate via the adhesive layer, The transmission axis of the polarizing plate of the first strip-shaped film 10A when the transmission axis direction of the polarizing plate combines the release film 11B side and the release film 11A side of the first strip-shaped film 10A. The cut surface on the traveling direction side perpendicular to the longitudinal direction of the second belt-like film 10B supplied from the back plate surface side of the substrate 1 to be conveyed is a length corresponding to the substrate 1. The second cutting means 31B that cuts at least the polarizing plate and the adhesive layer in a direction perpendicular to the longitudinal direction, leaving the release film 11B, and the second strip film 10B, By first release film separating means 32A for separating the release film 11A from the first film piece 19A cut from the first strip film 10A by the first cutting means 31A, and by the second cutting means 31B. Second release film separating means 3 for separating the release film 11B from the second film piece 19B cut out from the second belt-like film 10B. B and the adhesive surface of the first film piece 19A from which the release film 11A is separated so that the cut surface of the first film piece 19A is parallel to the front end surface in the transport direction of the substrate 1 In addition, the bonding surface of the second film piece 19B from which the release film 11B is separated is bonded to the corresponding front side plate surface of the substrate 1, and the cut surface of the second film piece 19B is Bonding means 33 for bonding to the corresponding back side plate surface of the substrate 1 so as to be parallel to the front end surface in the transport direction of the substrate 1. Thereby, while being able to bond a polarizing plate automatically to both surfaces of a board | substrate simultaneously and continuously, the yield of a polarizing plate can be made into 100%. Moreover, the transmission axis direction of the polarizing plate bonded on both surfaces can be made to cross each other and bonded by using two unwinding rolls of the same type.

  The strip-shaped film (10A, 10B in FIG. 1) applied in the present invention has the release film 11 on the polarizing plate 16 via the adhesive layers 14, 12 (retardation film 13), as shown in FIG. 2 (B). It is a film using what was stuck. When the polarizing plate 16 is used for an LCD for a TN liquid crystal, the transmission axis direction is obliquely oriented with respect to the film longitudinal direction, and the inclination angle between the film longitudinal direction and the transmission axis direction is 20 ° or more and 70 °. Although it is preferably below, it is more preferably 40 ° or more and 50 ° or less, and usually 45 ° (see FIG. 2 (A)). For a method for producing such a polarizing plate, refer to JP-A-2002-86554. The polarizing plate 16 preferably has protective films 15 and 17 attached to both sides thereof. Since the polarizing plate 16 here is a polarizing plate that is obliquely stretched with respect to the longitudinal direction of the film, it is hereinafter referred to as an “obliquely stretching polarizing plate”. If the obliquely stretched polarizing plate 16 is used, a continuous film can be supplied. Moreover, when the 1st strip | belt-shaped film 10A and the 2nd strip | belt-shaped film 10B match | combine the peeling film 11A side of the 1st strip | belt-shaped film 10A and the peeling film 11B side of the 2nd strip | belt-shaped film 10B, it is 1st. Used in such a combination that the transmission axis direction of the polarizing plate of the belt-like film 10A and the transmission axis direction of the polarizing plate of the second belt-like film 10B are orthogonal to each other. For example, the polarizing plate with respect to the longitudinal direction of the first belt-like film 10A In the case where a film whose transmission axis direction is oriented at 70 ° is used, a film whose transmission axis direction of the polarizing plate is oriented at 20 ° with respect to the longitudinal direction can be used for the second strip film 10B. Further, the first strip film 10A and the second strip film 10B (the first film piece 19A and the second film piece 19B) are obliquely stretched (transmission axis direction) when viewed from the respective adhesive surfaces. Is preferably 45 ° and the same is used (see FIG. 3). This is because by using the same material in the oblique stretching direction, the transmission axis directions can be crossed when polarizing plates are bonded to both surfaces of the substrate 1. In addition, when used for an LCD for VA liquid crystal or an LCD for IPS liquid crystal, the polarizing plate 16 may be one in which the transmission axis direction of the polarizing plate is aligned parallel or perpendicular to the longitudinal direction of the film. In the case of using the first strip film 10A in which the transmission axis direction of the polarizing plate is oriented parallel to the longitudinal direction, the transmission axis direction of the polarizing plate is oriented perpendicular to the longitudinal direction of the second strip film 10B. Things can be used.

  In the case of a circularly polarizing film in which the retardation film 13 is bonded to the obliquely stretched polarizing plate 16 (protective film 15) via the adhesive layer 14, the retardation film 13 has an orientation axis orthogonal or parallel to the film longitudinal direction. It is preferable to use what has. If it does in this way, a circularly-polarizing film can be supplied continuously. In the case of a circularly polarizing film, if the orientation axis of the retardation film of the first strip film (10A in FIG. 1) is parallel to the film longitudinal direction, the retardation film of the second strip film (10B in FIG. 1) The orientation axis is perpendicular to the film longitudinal direction.

  Although the thickness of the polarizing plate 16 is not specifically limited, For example, it is about 5-100 micrometers. The width of the polarizing plate 16 is appropriately selected according to the size of the substrates to be bonded. A 1st strip | belt-shaped film (10A of FIG. 1) and a 2nd strip | belt-shaped film (10B of FIG. 1) can each use the same width | variety. The adhesives 12 and 16 may be ordinary adhesives (for example, acrylic adhesives, polyurethane adhesives, epoxy adhesives, rubber adhesives, etc.) used for bonding the substrate and the optical film. . The release film 11 is a release material and may be an ordinary release material (for example, a polyethylene terephthalate film, a polyester film, etc.) used for an optical film. In order to protect the surface of the film from scratches or the like, an interleaf paper 18 may be attached to the surface of the polarizing plate opposite to the surface to which the release film 11 is attached. The strip films 10A and 10B are preferably supplied from unwinding rolls 34A and 34B (see FIG. 1).

  The substrate 1 is a flat plate member such as a glass substrate or a synthetic resin substrate used for a display device such as a liquid crystal display device or a plasma display device, and may be a substrate on which components such as a liquid crystal cell and an electrode are formed in advance. Good. The shape of the substrate 1 is preferably a substantially square shape such as a square or a rectangle (see FIGS. 1 and 2A).

  The first cutting means 31A and the second cutting means 31B are a push-cut cutter, a dicing cutter, etc. used for normal cutting of an optical film. For example, a cutter blade, a cylinder that drives the cutter blade, and a cutter blade The thing provided with the bottom dead center position adjustment member which adjusts a bottom dead center position is mentioned. By adjusting the bottom dead center position to 0 to 0.5 times the thickness of the release film 11, other layers (polarizing plates) leaving the release film 11 (thickness 10 to 50 μm or less) are left. , Adhesive layer, etc.) can be cut in a direction perpendicular to the film longitudinal direction (hereinafter referred to as half cut) (see FIG. 1).

  The first release film separating means 32A and the second release film separating means 32B are means for separating the release films 11A and 11B from the film pieces 19A and 19B (see FIG. 1), and examples thereof include rollers and wedge members. be able to.

  Note that the release films 11A and 11B separated from the film pieces 19A and 19B may be wound around the winding rolls 35A and 35B and collected (see FIG. 1).

  The bonding means 33 is configured such that the adhesive surfaces of the two film pieces 19A and 19B from which the release films 11A and 11B are separated are the end face on the front end side in the transport direction of the substrate transported by the transport means 36 and the film pieces 19A and 19B. Is a means for simultaneously bonding to corresponding positions of the substrate 1 so that the cut surfaces of the substrate are parallel (see FIG. 1), for example, a nip roller (rubber roller, metal roller) that is pressed from both surfaces of the substrate. In the case of a roller, a combination of two rubber rolls having a hardness of 60 to 80 ° or a combination of one rubber roll having a hardness of 60 to 80 ° and a metal roll is preferable. The nip pressure of the roller at the time of pasting is preferably a linear pressure of 1 kg / cm or less.

  The conveying means 36 is preferably a roller conveyor or a wheel conveyor that horizontally conveys the substrate 1 on a plurality of arranged rollers or wheels, and more preferably a roller outer cylinder or a shaft on which a wheel rotates via a bearing. By being attached, the roller outer cylinder or wheel rotates at a surface speed that matches the speed of the substrate being transported and prevents the substrate from being damaged by sliding between the roller outer cylinder or wheel and the substrate. preferable.

  Next, Embodiment 2 of the present invention will be described with reference to the drawings. FIG. 4: is the side view which showed typically the structure of the polarizing plate bonding apparatus which concerns on Embodiment 2 of this invention. FIG. 5 is an exploded perspective view schematically showing the relationship between the stretching direction of the polarizing plate bonded to both surfaces of the substrate by the polarizing plate bonding apparatus according to Embodiment 1 of the present invention and the substrate.

  When the polarizing plate bonding apparatus 40 according to Embodiment 2 is referred to FIG. 4, the release film 11 </ b> A is bonded onto the polarizing plate via an adhesive layer, and the front surface side of the substrate 1 to be conveyed. The first release film separating means 41A for separating the release film 11A from the first belt-like film 10A supplied from the first release film 11A, and the release film 11B is stuck on the polarizing plate via an adhesive layer, and the polarized light The transmission axis direction of the plate is perpendicular to the transmission axis direction of the polarizing plate of the first strip film 10A when the release film 11B side and the release film 11A side of the first strip film 10A are combined, and A second release film separating means 41B for separating the release film 11B from a second belt-like film 10B supplied from the back plate side of the substrate 1 being conveyed; and the release film. The adhesive surface of the first belt-like film 10A from which the film 11A has been separated corresponds to the front side plate of the substrate 1 so that the traveling direction of the first belt-like film 11A corresponds to the transport direction of the substrate 1 The adhesive surface of the second strip film 10B from which the release film 11B has been separated is bonded to the surface so that the traveling direction of the second strip film 10B corresponds to the transport direction of the substrate 1. Bonding means 42 for bonding to the corresponding back side plate surface of the substrate 1, and the first band-shaped film 10 </ b> A and the second band-shaped film bonded to both surfaces of the substrate 1 by the bonding means 42. Cutting means 43 for cutting 10B in parallel with the end face on the front side in the transport direction of the substrate 1 or the end face on the rear side thereof. Thus, the polarizing plate can be automatically and continuously bonded to both surfaces of the substrate without stopping the conveyance of the substrate, and the yield of the polarizing plate can be 100%. Moreover, the transmission axis direction of the polarizing plate bonded on both surfaces can be made to cross each other and bonded by using two unwinding rolls of the same type.

  The peeling film separation means 41A and 41B, the bonding means 42, the unwinding rolls 44A and 44B, the winding rolls 45A and 45B, and the conveying means 46 of the polarizing plate bonding apparatus 40 according to the second embodiment (see FIG. 4), respectively. The peeling film separating means 32A, 32B, the bonding means 33, the unwinding rolls 34A, 34B, the winding rolls 35A, 35B, and the conveying means 36 of the polarizing plate bonding apparatus according to Embodiment 1 are substantially the same (see FIG. 1). ). The board | substrate 1 and strip | belt-shaped film 10A, 10B which are used in the polarizing plate bonding apparatus 40 concerning Embodiment 2 are the same as what is used in Embodiment 2. FIG. The position of the cutting means 43 of the polarizing plate bonding apparatus 40 according to the second embodiment is different from the cutting means with the polarizing plate bonding apparatus according to the first embodiment. In addition, in the bonding means 42 of FIG.

  In the conveyance means 46 of FIG. 4, it has the cutting | disconnection means 43 on the conveyance line downstream from the bonding means 42. FIG. On the transport means 46 upstream of the pasting means 42, it is preferable that the end surface in the transport direction of the substrate 1 is in contact with and transported at least by the time of pasting. This is because the yield of the polarizing plate can be increased.

  The cutting means 43 in FIG. 4 is configured so that each of the first belt-like film 10A and the second belt-like film 10B bonded to both surfaces of the substrate 1 by the bonding means 42 is an end face on the front side in the transport direction of the substrate 1 or thereafter. Cut parallel to the end face. Here, since the release films 11A and 11B are not attached to the first strip film 10A and the second strip film 10B, the first strip film 10A and the second strip film 10B are not half-cut. Cut the whole almost simultaneously.

  The first belt-like film 10A and the second belt-like film 10B preferably have the same oblique stretching direction (transmission axis direction) when viewed from the respective adhesive surfaces (see FIG. 5). This is because by using the same material in the oblique stretching direction, the transmission axis directions can be crossed when polarizing plates are bonded to both surfaces of the substrate 1.

  Embodiment 3 of the present invention will be described with reference to the drawings. FIG. 6: is the perspective view which showed schematically the structure of the polarizing plate bonding apparatus which concerns on Embodiment 3 of this invention. FIG. 7: is the top view which showed typically the structure of the polarizing plate bonding apparatus which concerns on Embodiment 3 of this invention. FIG. 8: is the side view which showed typically the structure of the 1st conveyance part of the polarizing plate bonding apparatus which concerns on Embodiment 3 of this invention. FIG. 9: is the side view which showed typically the structure of the 2nd conveyance part of the polarizing plate bonding apparatus which concerns on Embodiment 3 of this invention.

  If FIG. 6 is referred, the polarizing plate bonding apparatus which concerns on Embodiment 3 can be divided roughly into a 1st conveyance part, an inversion part, and a 2nd conveyance part. In the first transport unit, the substrate (1A in FIG. 7) supplied from the supply unit is transported, the polarizing film unwound from the unwinding roll is half cut at a predetermined length, and the release film is separated, The cut polarizing plate is bonded to the lower surface of the substrate (1B in FIG. 7). In the reversing section, the substrate transported from the first transport section (the substrate on which the polarizing plate is bonded to the lower side; 1B in FIG. 7), the end surface on the traveling direction side of the substrate after reversing is the traveling direction Are turned upside down so as to be orthogonal to each other, and the inverted substrate (the substrate on which the polarizing plate is bonded to the upper surface; 1C in FIG. 7) is sent to the second transport unit. In the second transport unit, the substrate sent from the reversing unit (the substrate on which the polarizing plate is bonded to the upper one surface; 1D in FIG. 7) is orthogonal to the direction of the substrate transported by the first transport unit. The polarizing plate unwound from the unwinding roll is half-cut with a predetermined length to separate the release film, and the cut polarizing plate is a substrate (the substrate on which the polarizing plate is bonded on both sides; 7 1E) is bonded to the lower side.

  If it demonstrates in detail about the structure of the polarizing plate bonding apparatus which concerns on Embodiment 3 using FIG.8 and FIG.9, the polarizing plate bonding apparatus 50 makes one end surface of the board | substrate 1 orthogonal to a advancing direction, and is said board | substrate. 1 A of the 1st conveyance means 51A which conveys 1 and the 1st strip | belt-shaped film 10A by which 11 A of peeling films were stuck on the polarizing plate via the adhesive bond layer are the cut surfaces of the advancing direction side orthogonal to the longitudinal direction When the film travels to a length corresponding to the substrate 1, the first strip film 10A is cut in a direction perpendicular to the longitudinal direction at least the polarizing plate and the adhesive layer, leaving the release film 11A. One cutting means 52A, a first peeling film separating means 53A for separating the peeling film 11A from the first film piece 19A cut by the cutting of the first cutting means 52A, The adhesive surface of the first film piece 19A from which the release film 11A is separated is cut between the front end face in the traveling direction of the substrate 1 conveyed by the first conveying means 51A and the first film piece 19A. 54 A of 1st bonding means bonded to the plate | board surface piece side to which the said board | substrate 1 respond | corresponds, and the said 1st film piece 19A conveyed by the said 1st conveyance means 51A so that a surface may become parallel. The bonded substrate 1 is transported by reversing means 55 for turning upside down and the first transporting means 51A so that the end surface on the traveling direction side of the substrate 1 after reversal is orthogonal to the traveling direction. The peeling film 11B is attached to the second conveying means 51B for conveying the substrate 1 in the direction perpendicular to the conveying direction of the first conveying means 51A and an adhesive layer on the polarizing plate. With The transmission axis direction of the polarizing plate is orthogonal to the transmission axis direction of the polarizing plate of the first strip film 10A when the release film 11B side and the release film 11A side of the first strip film 10A are combined. And the 2nd strip | belt-shaped film 10B supplied from the plate | board surface side on the opposite side to the surface where the said 1st film piece 19A of the said board | substrate 1 conveyed by the said 2nd conveyance means 51B was bonded is the longitudinal direction. When the cut surface on the traveling direction side orthogonal to the direction has traveled to a length corresponding to the substrate 1 transported by the second transport means 51B, the second strip film 10B is left as the release film 11B. The second cutting means 52B for cutting at least the polarizing plate and the adhesive layer in a direction perpendicular to the longitudinal direction, and the second cutting means 52B cut out. The second release film separating means 53B for separating the release film 11B from the second film piece 19B, and the adhesive surface of the second film piece 19B from which the release film 11B is separated, The corresponding first film piece 19A of the substrate 1 is pasted so that the end surface on the traveling direction side of the substrate 1 conveyed by the conveying means 51B is parallel to the cut surface of the second film piece 19B. 2nd bonding means 54B bonded to the plate surface on the opposite side to the combined surface.

  The polarizing plate bonding apparatus 50 according to the third embodiment bonds the film piece 19 </ b> A from the lower side of the substrate 1 in FIGS. 6 to 9, inverts the substrate, and moves the film piece 19 </ b> A from the lower side of the substrate 1. Although it is bonded, the film piece 19A may be bonded from the upper side of the substrate 1, the substrate may be inverted, and the film piece 19A may be bonded from the upper side of the substrate 1, or the film piece from the lower side of the substrate 1 19A may be pasted and the film piece 19A may be pasted from the upper side of the substrate 1 without reversing the substrate. The film piece 19A may be pasted from the upper side of the substrate 1 without reversing the substrate. The film piece 19A may be bonded from the lower side. If it is the polarizing plate bonding apparatus 50 of the type which bonds the film piece 19A from the lower side of the board | substrate 1 and inverts a board | substrate and bonds the film piece 19A from the lower side of the board | substrate 1, it will be the downward side of a strip | belt-shaped film. Therefore, there is an advantage that dust can be prevented from being mixed.

  Although the board | substrate 1 and strip | belt-shaped film 10A, 10B used in the polarizing plate bonding apparatus 50 which concerns on Embodiment 3 are the same as what is used in Embodiment 2, when the vertical and horizontal lengths of the board | substrate 1 differ, strip | belt shape. The film widths of the film 10 </ b> A and the strip-shaped film 10 </ b> B may be different from each other corresponding to the substrate 1. Thereby, since the unwinding roll by which the strip | belt-shaped film was wound can be distinguished by size (width), it is easy to distinguish also at the time of replacement | exchange of a roll. Moreover, when setting it as a circularly-polarizing film, the orientation axis | shaft of the retardation film of the 1st strip | belt-shaped film 10A and the alignment axis of the retardation film | membrane of the 2nd strip | belt-shaped film 10B are made the same. Thereby, the orientation axis | shaft of a phase difference film when a film piece is bonded on both surfaces of a board | substrate can be mutually orthogonally crossed, and it is possible to supply a strip | belt-shaped film continuously.

  Conveying means 51A, 51B, cutting means 52A, 52B, peeling film separating means 53A, 53B, bonding means 54A, 54B, unwinding rolls 56A, 56B, and winding rolls 57A, 57B according to Embodiment 3 are shown in FIG. And FIG. 9), which are substantially the same as the conveying means 36, the cutting means 31B, the release film separating means 32B, the bonding means 33, the unwinding roll 34B, and the winding roll 35B of the polarizing plate bonding apparatus according to Embodiment 1, respectively. Yes (see FIG. 1).

  In the bonding means 54 </ b> A of the third embodiment, the film piece 19 </ b> A is bonded only to one side of the substrate 1. In the bonding means 54 </ b> B, the film pieces 19 </ b> A and 19 </ b> B are apparently bonded to both surfaces of the substrate 1, but the film piece 19 </ b> B is substantially bonded to one surface of the substrate 1.

  When the direction of supplying the film pieces 19A and 19B is the same in the bonding means 54A and 54B, for example, the reversing means 55 supplies the film piece 19A from the lower surface side of the substrate by the first bonding means 54A, and the second Necessary when the film piece 19B is supplied from the lower surface side of the substrate by the bonding means 54B. In addition, when the direction which supplies film piece 19A, 19B opposes in the bonding means 54A, 54B, for example, the film piece 19A is bonded from the board | substrate lower surface by the 1st bonding means 54A, and it is the 2nd bonding means. When the film piece 19B is pasted from the upper surface of the substrate at 54B, the reversing means 55 is unnecessary.

  Embodiment 4 of the present invention will be described with reference to the drawings. FIG. 10: is the side view which showed typically the structure of the 1st conveyance part of the polarizing plate bonding apparatus which concerns on Embodiment 4 of this invention. FIG. 11: is the side view which showed typically the structure of the 2nd conveyance part of the polarizing plate bonding apparatus which concerns on Embodiment 4 of this invention.

  The polarizing plate bonding apparatus according to Embodiment 4 can be roughly divided into a first transport unit, a reversing unit, and a second transport unit, similarly to the polarizing plate bonding apparatus according to Embodiment 3 shown in FIG. . In the 1st conveyance part, the board | substrate (1A of FIG. 7) supplied from the supply part is conveyed, the peeling film is isolate | separated from the polarizing plate unwound from the unwinding roll, and a polarizing plate is a board | substrate (FIG. 7). 1B) is bonded to the lower one surface, and the polarizing plate is cut at a predetermined position. In the reversing section, the substrate transported from the first transport section (the substrate on which the polarizing plate is bonded to the lower side; 1B in FIG. 7), the end surface on the traveling direction side of the substrate after reversing is the traveling direction Are turned upside down so as to be orthogonal to each other, and the inverted substrate (the substrate on which the polarizing plate is bonded to the upper surface; 1C in FIG. 7) is sent to the second transport unit. In the second transport unit, the substrate sent from the reversing unit (the substrate on which the polarizing plate is bonded to the upper one surface; 1D in FIG. 7) is orthogonal to the direction of the substrate transported by the first transport unit. The polarizing film unloaded from the unwinding roll is separated from the release film, and the polarizing plate is bonded to the lower side of the substrate (the substrate on which the polarizing plate is bonded to both sides; 1E in FIG. 7). Then, the polarizing plate is cut at a predetermined position.

  If it demonstrates in detail about the structure of the polarizing plate bonding apparatus which concerns on Embodiment 4 using FIG.10 and FIG.11, the polarizing plate bonding apparatus 60 makes one end surface of the board | substrate 1 orthogonal to a advancing direction, and the said board | substrate. 1st conveyance means 61A which conveys 1 and 1st peeling film separation which isolate | separates said peeling film 11A from 10 A of 1st strip | belt-shaped films with which peeling film 11A was stuck on the polarizing plate through the adhesive bond layer Means 62A and the adhesive surface of the first belt-like film 10A from which the release film 11A is separated, the traveling direction of the first belt-like film 10A is conveyed by the first carrier means 61A. The first bonding means 63A for bonding to the corresponding plate surface one side of the substrate 1 and the first bonding means 63A bonded to the substrate 1 by the first bonding means 63A so as to correspond to the transport direction. First cutting means 64A for cutting the belt-like film 10A in parallel with the front end face or the rear end face in the transport direction of the substrate 1 transported by the first transport means 61A, and the first The substrate 1 on which the first film piece 19A that has been transported by the transport means 61A is bonded is moved up and down so that the end surface on the traveling direction side of the substrate 1 after reversal is orthogonal to the traveling direction. Reversing means 65 for reversing, second transporting means 61B for transporting the substrate 1 transported by the first transporting means 61A in a direction perpendicular to the transporting direction of the first transporting means 61A, and polarization A release film 11B is stuck on the plate via an adhesive layer, and the transmission axis direction of the polarizing plate is the release film 11B side and the release film of the first strip film 10A. The first film piece 19A of the substrate 1 that is orthogonal to the transmission axis direction of the polarizing plate of the first strip film 10A when combined with the 1A side and is transported by the second transport means 61B. The second release film separating means 62B for separating the release film 11B from the second belt-like film 10B supplied from the plate surface side opposite to the surface on which the release film is bonded, and the release film 11B is separated. The bonding surface of the second belt-like film 10B corresponds to the substrate 1 so that the traveling direction of the second belt-like film 10B corresponds to the transport direction of the substrate 1 transported by the second transport means 61B. The second laminating means 63B for laminating on the plate surface opposite to the surface where the film piece 19A of the first strip-shaped film 10A is pasted, and the second laminating means 63B The second belt-like film 10B bonded on the substrate 1 is cut in parallel with the front end surface or the rear end surface in the transport direction of the substrate 1 transported by the second transport means 61B. Two cutting means 64B.

  In FIG. 10 and FIG. 11, the polarizing plate bonding apparatus 60 according to the fourth embodiment bonds the film piece 19 </ b> A from the lower side of the substrate 1, inverts the substrate, and turns the film piece 19 </ b> A from the lower side of the substrate 1. Although it is bonded, the film piece 19A may be bonded from the upper side of the substrate 1, the substrate may be inverted, and the film piece 19A may be bonded from the upper side of the substrate 1, or the film piece from the lower side of the substrate 1 19A may be pasted and the film piece 19A may be pasted from the upper side of the substrate 1 without reversing the substrate. The film piece 19A may be pasted from the upper side of the substrate 1 without reversing the substrate. The film piece 19A may be bonded from the lower side. If it is the polarizing plate bonding apparatus 50 of the type which bonds the film piece 19A from the lower side of the board | substrate 1 and inverts a board | substrate and bonds the film piece 19A from the lower side of the board | substrate 1, it will be the downward side of a strip | belt-shaped film. Therefore, there is an advantage that it is possible to prevent dust from being mixed.

  The board | substrate 1 and strip | belt-shaped film 10A, 10B used in the polarizing plate bonding apparatus 50 which concerns on Embodiment 4 are the same as what is used in Embodiment 3. FIG.

  Release film separating means 62A, 62B, bonding means 63A, 63B, unwinding rolls 66A, 66B, and winding rolls 67A, 67B according to Embodiment 4 (see FIGS. 10 and 11) are respectively related to Embodiment 3. It is substantially the same as peeling film separation means 53A, 53B, bonding means 54A, 54B, unwinding rolls 56A, 56B, and winding rolls 57A, 57B of the polarizing plate bonding apparatus (see FIGS. 8 and 9). Conveying means 61A and 61B according to the fourth embodiment (see FIGS. 10 and 11) are the same as the conveying means 46 according to the second embodiment (see FIG. 4). Unlike the cutting means according to the third embodiment, the cutting means 64A and 64B according to the fourth embodiment are arranged on a line on the downstream side of the bonding means 63A and 63B of the conveying means 61A and 61B. The strip films 10A and 10B are cut only on the lower surface side. In addition, in the bonding means 54, it is different by the point which bonds the strip | belt-shaped films 10A and 10B which are not cut | disconnected rather than a film piece on both surfaces of the board | substrate 1. FIG.

DESCRIPTION OF SYMBOLS 1 Substrate 10, 10A, 10B Strip film 11, 11A, 11B Release film 12, 14 Adhesive layer 13 Retardation film 15, 17 Protective film 16 Polarizing plate 18 Interleaf paper 19, 19A, 19B Film piece 30, 40 Combined device 31A, 31B, 43 Cutting means 32A, 32B, 41A, 41B Peeling film separating means 33, 42 Pasting means 34A, 34B, 44A, 44B Unwinding roll 35A, 35B, 45A, 45B Winding roll 36, 46 Conveyance Means 50, 60 Polarizing plate bonding apparatus 51A, 51B, 61A, 61B Conveying means 52A, 52B, 64A, 64B Cutting means 53A, 53B, 62A, 62B Peeling film separating means 54A, 54B, 63A, 63B Bonding means 55, 65 Reverse means 56A, 56B, 66A, 66B Unwinding roll 5 7A, 57B, 67A, 67B Winding roll

Claims (15)

First transport means for transporting the substrate with one end face of the substrate orthogonal to the traveling direction;
The bonding surface of the first film piece having the polarizing plate is arranged such that the cut surface of the first film piece is parallel to the end surface on the traveling direction side of the substrate conveyed by the first conveying means. First bonding means for bonding to one side of the corresponding plate surface;
Second transport means for transporting the substrate transported by the first transport means in a direction perpendicular to the transport direction of the first transport means;
A polarizing plate and a transmission axis of the polarizing plate of the first film piece when the transmission axis direction of the polarizing plate matches the bonding surface side of the polarizing plate and the bonding surface side of the first film piece Adhesion of a second film piece which is orthogonal to the direction and which is supplied from the plate surface side opposite to the surface on which the first film piece of the substrate conveyed by the second conveying means is bonded. The corresponding first film piece of the substrate is attached so that the cut surface of the second film piece is parallel to the end surface on the traveling direction side of the substrate conveyed by the second conveying means. A second laminating means for laminating to the plate surface opposite to the mated surface;
Equipped with a,
The cut surface of the first film piece is a cut surface obtained by cutting the first strip film,
The polarizing plate laminating apparatus, wherein the cut surface of the second film piece is a cut surface obtained by cutting the second strip-shaped film . First transport means for transporting the substrate with one end face of the substrate orthogonal to the traveling direction;
When the cut surface on the traveling direction side perpendicular to the longitudinal direction of the first strip-shaped film having the release film attached to the polarizing plate via the adhesive layer has traveled to a length corresponding to the substrate, First cutting means for cutting at least the polarizing plate and the adhesive layer in a direction perpendicular to the longitudinal direction, leaving the first strip-shaped film leaving the release film;
First release film separating means for separating the release film from the first film piece cut out by the cutting of the first cutting means;
The bonding surface of the first film piece from which the release film is separated is parallel to the front end surface in the traveling direction of the substrate conveyed by the first conveying means and the cut surface of the first film piece. First bonding means for bonding to the corresponding plate surface one side of the substrate,
Second transport means for transporting the substrate transported by the first transport means in a direction perpendicular to the transport direction of the first transport means;
The release film is stuck on the polarizing plate via an adhesive layer, and the transmission axis direction of the polarizing plate is the first when the release film side and the release film side of the first strip film are combined. From the plate surface side opposite to the surface on which the first film piece of the substrate that is orthogonal to the transmission axis direction of the polarizing plate of the belt-shaped film 1 and is conveyed by the second conveying means is bonded. When the second belt-like film to be fed advances to a length corresponding to the substrate transported by the second transport means, the second belt-like film has a cut surface on the traveling direction side orthogonal to the longitudinal direction. A second cutting means for cutting at least the polarizing plate and the adhesive layer in a direction perpendicular to the longitudinal direction leaving the release film,
Second release film separating means for separating the release film from the second film piece cut out by the cutting of the second cutting means;
The bonding surface of the second film piece from which the release film has been separated is parallel to the end surface on the traveling direction side of the substrate that has been conveyed by the second conveying means and the cut surface of the second film piece. The second bonding means for bonding to the plate surface opposite to the surface to which the corresponding first film piece of the substrate is bonded;
A polarizing plate laminating apparatus comprising: First transport means for transporting the substrate with one end face of the substrate orthogonal to the traveling direction;
The adhesive surface of the first strip film having the polarizing plate corresponds so that the traveling direction of the first strip film is parallel to the end surface on the traveling direction side of the substrate transported by the first transport means. A first cutting means for cutting in parallel with an end face on the front side in the transport direction of the substrate bonded to one side of the plate surface or an end face on the rear side thereof;
Second transport means for transporting the substrate transported by the first transport means in a direction perpendicular to the transport direction of the first transport means;
A polarizing plate and a transmission axis of the polarizing plate of the first film piece when the transmission axis direction of the polarizing plate matches the bonding surface side of the polarizing plate and the bonding surface side of the first film piece A second belt shape which is orthogonal to the direction and which is supplied from the plate surface side opposite to the surface on which the film piece of the first belt film of the substrate transported by the second transport means is bonded. The corresponding first belt-like shape is such that the adhesive surface of the film is parallel to the end surface on the traveling direction side of the substrate transported on the line of the second transport means, the cut surface of the second belt-shaped film. A second cutting means for cutting in parallel with an end surface on the front side in the transport direction of the substrate or a rear end surface thereof, which is bonded to the plate surface opposite to the surface on which the film piece of the film is bonded;
A polarizing plate laminating apparatus comprising: First transport means for transporting the substrate with one end face of the substrate orthogonal to the traveling direction;
A first release film separating means for separating the release film from the first belt-like film in which the release film is stuck on the polarizing plate via an adhesive layer;
The adhesion surface of the first belt-like film from which the release film has been separated is such that the traveling direction of the first belt-like film corresponds to the traveling direction of the substrate transported by the first transporting means. A first laminating means for laminating to a corresponding plate surface one side of the substrate;
An end face on the front side or an end face on the rear side in the transport direction of the substrate, which is transported by the first transport means, the first strip-shaped film pasted on the substrate by the first pasting means. First cutting means for cutting in parallel with,
Second transport means for transporting the substrate transported by the first transport means in a direction perpendicular to the transport direction of the first transport means;
The release film is stuck on the polarizing plate via an adhesive layer, and the transmission axis direction of the polarizing plate is the first when the release film side and the release film side of the first strip film are combined. From the plate surface side opposite to the surface on which the first film piece of the substrate that is orthogonal to the transmission axis direction of the polarizing plate of the belt-shaped film 1 and is conveyed by the second conveying means is bonded. A second release film separating means for separating the release film from the supplied second belt-shaped film;
The adhesive surface of the second strip film from which the release film has been separated is such that the traveling direction of the second strip film corresponds to the traveling direction of the substrate transported by the second transport means. A second laminating means for laminating on the plate surface opposite to the surface on which the film piece of the first strip-shaped film corresponding to the substrate is bonded;
An end face on the front side in the transport direction of the substrate transported by the second transport means or an end face on the rear side of the second belt-shaped film pasted on the substrate by the second pasting means A second cutting means for cutting in parallel;
A polarizing plate laminating apparatus comprising: Using a substantially square and constant size substrate,
The polarizing plate bonding according to any one of claims 1 to 4, wherein the first transport unit and the second transport unit transport a plurality of the substrates arranged in series in a traveling direction. apparatus.   The substrate on which the first film piece that has been transported by the first transport unit is bonded is turned upside down so that the end surface on the traveling direction side of the substrate after reversing is orthogonal to the traveling direction. The polarizing plate bonding apparatus according to any one of claims 1 to 5, further comprising a reversing unit that performs the reversing unit. The first transport unit and the second transport unit transport the board surface of the substrate horizontally,
The first cutting means and the second cutting means are disposed below the substrate conveyed by the first conveying means and the second conveying means,
The first bonding means bonds the first film piece supplied from the lower side of the substrate conveyed by the first conveying means to the substrate,
The said 2nd bonding means bonds the said 2nd film piece supplied from the downward side of the board | substrate conveyed by the said 2nd conveyance means to the said board | substrate. Polarizing plate bonding device.   The polarizing plate laminating apparatus according to claim 6 or 7, wherein the first cutting means and the second cutting means are cut from a lower surface of the supplied belt-like film.   The polarizing plate bonding according to any one of claims 1 to 8, wherein the first transport unit and the second transport unit are a roller conveyor in which rollers are arranged or a wheel conveyor in which wheels are arranged. apparatus. In the first strip film, a retardation film having an alignment axis perpendicular or parallel to the film longitudinal direction is interposed between the polarizing plate and the adhesive layer,
The retardation film having an orientation axis in the same direction as the orientation axis of the retardation film of the first belt film is interposed between the second belt-like film and the longitudinal direction of the film. The polarizing plate bonding apparatus as described in any one of these.   The polarizing plate pasting as described in any one of Claims 1 thru | or 10 used for the polarizing plate of a said 1st strip | belt-shaped film using the polarizing plate by which the transmission axis was diagonally oriented with respect to the film longitudinal direction. Combined device.   The polarizing plate pasting as described in any one of Claims 1 thru | or 10 using the polarizing plate with which the transmission axis was orientated in parallel with the film longitudinal direction for the polarizing plate of a said 1st strip | belt-shaped film. Combined device.   The polarizing plate pasting as described in any one of Claims 1 thru | or 10 using the polarizing plate with which the transmission axis was orientated at right angles with respect to the film longitudinal direction as a polarizing plate of a said 1st strip | belt-shaped film. Combined device. Transporting the substrate with one end face of the substrate orthogonal to the traveling direction;
Adhere the adhesive surface of the first film piece having the polarizing plate to the corresponding plate surface piece side of the substrate so that the cut surface of the first film piece is parallel to the front end surface in the substrate transport direction. Combining steps;
A step of changing and transferring the substrate that has been transferred in a direction perpendicular to the transfer direction;
A polarizing plate and a transmission axis of the polarizing plate of the first film piece when the transmission axis direction of the polarizing plate matches the bonding surface side of the polarizing plate and the bonding surface side of the first film piece An adhesive surface of the second film piece that is orthogonal to the direction and is supplied from the plate surface side opposite to the surface on which the first film piece of the substrate to be conveyed is bonded is the second The process of bonding to the board surface on the opposite side to the surface where the said 1st film piece corresponding to the said board | substrate was bonded so that the cut surface of a film piece may become parallel to the end surface of the front side of the conveyance direction of a board | substrate. When,
Only including,
The cut surface of the first film piece is a cut surface obtained by cutting the first strip film,
The polarizing plate bonding method, wherein the cut surface of the second film piece is a cut surface obtained by cutting the second strip film . Transporting the substrate with one end face of the substrate orthogonal to the traveling direction;
The adhesive surface of the first strip film having a polarizing plate is bonded to one side of the corresponding plate surface so that the traveling direction of the first strip film is parallel to the front end surface in the transport direction of the substrate. Cutting the substrate parallel to the front end surface or the rear end surface thereof in the transport direction;
A second transport step for transporting the substrate that has been transported in a direction orthogonal to the transport direction;
A polarizing plate and a transmission axis of the polarizing plate of the first film piece when the transmission axis direction of the polarizing plate matches the bonding surface side of the polarizing plate and the bonding surface side of the first film piece The adhesive surface of the second belt-shaped film that is orthogonal to the direction and is supplied from the plate surface side opposite to the surface on which the film piece of the first belt-shaped film of the substrate is bonded is the second surface. It is bonded to the plate surface on the opposite side to the surface on which the corresponding film piece of the first band-shaped film is bonded so that the cut surface of the band-shaped film is parallel to the end surface on the front side in the transport direction of the substrate. Cutting the substrate parallel to the front end surface or the rear end surface thereof in the transport direction;
The polarizing plate bonding method characterized by including.

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