JP2010076019A - Method of punching sheet-like member and punching device used for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of punching a sheet-like member capable of reducing dust caused during punching even when punching the plurally overlapped sheet-like members, and also to provide a punching device used for the same. <P>SOLUTION: A secondary intermediate raw sheet 20 that is an elastically deformable sheet-like member is disposed on a support base 10, a fixed area including an area at least outer than a cutting scheduled plane at the secondary intermediate raw sheet 20 is fixed by fixing means 16, 18, and an external force for generating a tensile force to the cutting scheduled plane over the entire cutting scheduled plane is imparted to the secondary intermediate raw sheet 20 by an external force imparting means 14. Punching is carried out by cutting the secondary intermediate raw sheet 20 at the cutting scheduled plane with a punching means 12 while the fixation and the imparting of the external force are executed, so that the wear of the punching means 12 and the cutting surface of the secondary intermediate raw sheet 20 is suppressed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a punching method and punching device for a sheet-like member.

  Sheet-like members are used in various fields. For example, a backlight unit used in a liquid crystal display has several types of sheet-like members such as a diffusion sheet for diffusing light for uniform brightness and a prism sheet for controlling the optical path to travel in a certain direction. It is configured as.

  Usually, these sheet-like members are placed on a support base, and are punched into a predetermined shape by a punching blade such as a Thomson blade or a pinnacle blade being brought into contact with and cut by a press mechanism. The punched sheet-like members are sequentially stacked one by one by hand, and are incorporated into the frame of the backlight unit.

When such a sheet-like member is punched, when the punching blade is separated from the sheet-like member, there arises a problem that the sheet-like member is turned up due to friction between the punching blade and the sheet-like member. A punching device that can solve this problem is described in Patent Document 1.
JP-A-10-328770

  In Patent Document 1, when a punching blade is separated from a punched sheet-like member, a plurality of stripper members are connected by strip-like members in order to prevent the sheet-like member from turning up due to friction with the punching blade. A punching device attached to the mold base is described.

  However, in the apparatus using the stripper member as shown in Patent Document 1, the sheet-like member is prevented from turning up, but the cutting surface of the sheet-like member and the punching blade are still in contact with each other. When the punching blade is separated from the sheet-like member in a state of simple contact, dust is generated due to friction.

  Especially for optical sheets such as diffusion sheets and prism sheets used in backlight units, beads for diffusing light are pasted on the base material, or prisms for controlling the optical path are formed. Therefore, these beads and prisms are easily peeled off or scraped off due to friction when the punching blades are separated, and dust is easily generated.

  Such dust has not been regarded as a problem in the past, but at the present time when liquid crystal displays have become higher in image quality and resolution, it is a factor that causes deterioration in display quality, and it is significant to reduce generated dust It has become a challenge.

  In recent years, demands for cost reduction as a response to the price reduction of liquid crystal displays have become strict, and cost reduction is also demanded in the manufacture of backlight units used in liquid crystal displays.

  As a means for meeting this requirement, a method of punching an optical sheet such as a diffusion sheet and a prism sheet, which have been stacked one after another into a predetermined shape, after having been put into a required laminated state Or, there is a method of automating the incorporation of the backlight unit into the frame, which has been performed manually.

  Although it is possible to reduce the cost by punching the laminated sheet-like member as described above, when the punching of the laminated sheet-like member is performed by the apparatus of Patent Document 1, more dust is generated. It will occur and display quality will be reduced.

  An object of the present invention is to provide a sheet-like member punching method and a punching device that can reduce dust generated when punching a plurality of stacked sheet-like members.

The present invention is a method of punching an elastically deformable sheet-like member into a predetermined shape,
A fixing step of fixing the fixing region including at least the region outside the planned cutting surface of the sheet-like member;
An external force applying step for applying an external force to the sheet-like member so as to generate tension on the planned cutting surface over the entire planned cutting surface after the fixing step is started;
Punching of the sheet-like member, comprising: a cutting step in which the fixing and the sheet-like member in a state where the external force is applied are cut by a punching means on the planned cutting surface. Is the method.

Further, the invention is characterized in that the sheet-like member is a laminated sheet-like member.
According to the present invention, in the external force applying step, the external force is applied by pushing a pushing area of the sheet-like member installed on a support base for supporting the sheet-like member by pushing means. It is characterized by.

In the present invention, the fixing region may be a part of a punching region that is a region surrounded by the scheduled cutting surface of the sheet-like member;
The sheet-like member is an area outside the indentation area, and is an area including four points connecting two points perpendicular to each other at the center of gravity of the punching area.

Further, the present invention is characterized in that the pushing is performed after the start of the fixing.
In the present invention, the indentation area is an area outside the punching area of the sheet-like member, and includes four points where line segments connecting two points are orthogonal to each other at the center of gravity of the punching area. It is characterized by being.

  Further, the present invention is characterized in that the pushing is performed by moving the pushing means to a position where the tip of the pushing means is lower than the entire cutting scheduled surface in the punching direction.

  Further, the present invention is characterized in that the fixing and the pushing are continued until the end of the punching.

  Further, the present invention is characterized in that the cutting is performed using a punching blade that vibrates in the punching direction by being vibrated by ultrasonic waves as the punching means.

Further, the present invention is a punching device for punching an elastically deformable sheet-like member into a predetermined shape,
A fixing means for fixing a fixing region including at least a region outside the planned cutting surface of the sheet-like member;
An external force applying means for applying an external force to the sheet-like member so as to generate a tension on the planned cutting surface over the entire planned cutting surface;
Punching means for cutting by cutting the sheet-like member at the planned cutting surface,
The sheet-like member punching device is configured to be able to perform the cutting while the fixing and the external force are applied.

Further, the present invention includes a support base for installing the sheet-like member,
The support base has a predetermined space;
The external force imparting means is a pushing means that is movable so as to push the pushing area of the sheet-like member installed on the support base in the direction of the predetermined space.

According to the present invention, the fixing means includes an internal fixing means for fixing a part of a punching area, which is an area surrounded by the scheduled cutting surface, of the sheet-like member, and an outer side of the pressing area of the sheet-like member. And an external fixing means for fixing a part of the area,
The apparatus includes an internal fixing mold having the internal fixing means, a punching mold having the punching means provided outside the internal fixing mold, and a pressing mold having the pushing means provided outside the punching mold. And an external fixing die provided on the outside of the pushing die and provided with the external fixing means.

According to the present invention, the fixing means includes an internal fixing means for fixing a part of a punching area, which is an area surrounded by the scheduled cutting surface, of the sheet-like member, and an outer side of the pressing area of the sheet-like member. And an external fixing means for fixing a part of the area,
The apparatus includes an integral punching die comprising the punching means, the pushing means, the internal fixing means and the external fixing means,
The punching means is provided outside the position where the internal fixing means is provided at a position on the integral punching die,
The pushing means is provided outside the position where the punching means is provided at a position on the integral punching die,
The external fixing means is provided outside the position where the pushing means is provided at a position on the integral punching die.

According to the present invention, the external fixing means is a member having a sharp tip.
Further, the present invention is characterized in that the punching means is a punching blade that can be vibrated by ultrasonic waves so as to vibrate in the punching direction.

  According to the present invention, there is provided a method for punching an elastically deformable sheet-like member into a predetermined shape, and a fixing step for fixing a fixing region including at least an area outside the planned cutting surface of the sheet-like member; Then, after the fixing step is started, an external force applying step for applying an external force to the sheet-like member so as to generate a tension on the planned cutting surface over the entire planned cutting surface, the fixing, and the applying of the external force. A sheet-like member punching method is provided, which includes a cutting step of cutting the sheet-like member in a state in which the sheet-like member is cut along the planned cutting surface by a punching unit.

  According to this method, the tension on the planned cutting surface is generated by the application of the external force to the entire planned cutting surface before the start of cutting. Therefore, when the sheet-like member is cut at the planned cutting surface, the sheet-like member tries to return to its original shape by an elastic force, and after the cutting is completed, a punching region that is a region surrounded by the planned cutting surface is: The sheet-like member that is shrunk inward and remains after being punched is shrunk in the direction of the fixed region. Therefore, contact between the punching means and the sheet-like member when the punching means is separated from the sheet-like member can be reduced, and friction between the punching means and the sheet-like member can be reduced. it can. Therefore, dust generated by the friction can be reduced.

  According to the invention, the sheet-like member is a laminated sheet-like member. By punching the laminated sheet-like members, a plurality of sheet-like members can be punched into a predetermined shape by one punching. Moreover, when punching is performed after forming the desired laminated state, the step of superimposing a plurality of sheet-like members after punching can be omitted.

  According to the invention, in the external force applying step, the external force is applied by pressing a pressing region of the sheet-like member installed on a support base for supporting the sheet-like member by a pushing means. To do. By generating the tension by the pushing, the tension can be generated by the moving mechanism of the pushing means without requiring a complicated mechanism and operation.

  According to the invention, the fixing region is a part of a punching region which is a region surrounded by the scheduled cutting surface of the sheet-like member and a region outside the pushing region of the sheet-like member. Thus, this is a region including four points where line segments connecting two points are orthogonal to each other at the center of gravity of the punched region. By fixing a part of the punching region, the time to reach the support base for each part of the punching means is shifted due to at least one variation in the inclination of the support base and the height in the punching direction of the punching means. The contact between the punching means and the punching region can be reduced even if the timing at which the punching region and the sheet-like member remaining after punching are separated differs for each portion of the punching region. . Further, the cutting of the sheet-like member is completed by fixing an area outside the indentation area and including an area including four points connecting two points perpendicular to each other at the center of gravity of the punching area. Thus, when the sheet-like member shrinks outward, the contact between the punching means and the sheet-like member remaining after being punched can be reduced.

  According to the invention, the pushing is performed after the start of the fixing. By starting the pushing after the start of the fixing, the deviation of the sheet-like member on the support base can be reduced, and the sheet-like member can be punched precisely.

  According to the invention, the indentation area is an area outside the punching area of the sheet-like member, and the four points connecting the two points are perpendicular to each other at the center of gravity of the punching area. It is an area to include. By pressing a region of the sheet-like member outside the punching region and including four points where line segments connecting two points are orthogonal to each other at the center of gravity of the punching region, the cutting scheduled surface Overall, it is possible to easily generate tension on the planned cutting surface.

  According to the invention, the pushing is performed by moving the pushing means to a position where the tip of the pushing means is lower in the punching direction than the entire cutting scheduled surface. By performing the pushing, tension on the planned cutting surface can be easily generated on the entire planned cutting surface.

  According to the invention, the fixing and the pushing are continued until the end of the punching. By continuing the fixing and the pushing from the end of the cutting to the end of the separation of the punching means, the punching means and the sheet-like member are independent of the timing and speed of the punching means. Can be reduced.

  According to the invention, the cutting is performed by using a punching blade that vibrates in the punching direction when vibrated by ultrasonic waves as the punching means. Even when the sheet-like member is made of a material that is cracked or chipped when subjected to an impact at a high speed by performing the cutting with the punching blade, the sheet-like member It is possible to reduce the occurrence of cracks and chippings that occur during cutting.

  According to the present invention, there is provided an apparatus for punching an elastically deformable sheet-like member into a predetermined shape, and fixing means for fixing a fixing area including at least an area outside a planned cutting surface of the sheet-like member. And an external force applying means for applying an external force to the entire sheet to be cut to generate a tension to the surface to be cut, to the sheet-like member, and cutting the sheet-like member at the to-be-cut surface to perform punching. A punching device for a sheet-like member configured to be capable of performing the cutting in a state in which the fixing and the external force are applied is provided. According to this apparatus, the tension | tensile_strength with respect to this to-be-cut surface is generate | occur | produced in the whole said to-be-cut surface before the said cutting start by provision of the said external force. Therefore, when the sheet-like member is cut at the planned cutting surface, the sheet-like member tries to return to its original shape by an elastic force, and after the cutting is completed, a punching region that is a region surrounded by the planned cutting surface is: The sheet-like member that is shrunk inward and remains after being punched is shrunk in the direction of the fixed region. Therefore, contact between the punching means and the sheet-like member when the punching means is separated from the sheet-like member can be reduced, and friction between the punching means and the sheet-like member can be reduced. it can.

  Further, according to the present invention, the apparatus includes a support base for installing the sheet-like member, the support base has a predetermined space, and the external force applying means is provided on the sheet-like member installed on the support base. Pushing means that is movable so as to push the pushing area in the direction of the predetermined space. By generating the tension by the pushing means, the tension can be generated by the moving mechanism of the pushing means without requiring a complicated mechanism and operation.

  Further, according to the present invention, the fixing means includes an internal fixing means for fixing a part of a punching area that is an area surrounded by the scheduled cutting surface of the sheet-like member, and the pushing area of the sheet-like member. An external fixing means for fixing a part of the outer area, and the apparatus includes an internal fixing mold provided with the internal fixing means, and a punching die provided with the punching means provided outside the internal fixing mold. A pushing die provided outside the punching die and provided with the pushing means, and an external fixing die provided outside the pushing die and provided with the external fixing means. By fixing a part of the punching area by the internal fixing means, the support base for each part of the punching means is caused by variation in at least one of the inclination of the support base and the height of the punching means in the punching direction. Even if the time to reach is different and the time when the punched area and the sheet-like member remaining after being punched are different for each part of the punched area, contact between the punching means and the punched area is made. Can be reduced. In addition, since the punching die, the pushing die, the internal fixing die, and the external fixing die can be moved independently, optimal control for the fixing, pushing, and cutting is performed for each. It can be carried out.

  Further, according to the present invention, the fixing means includes an internal fixing means for fixing a part of a punching area that is an area surrounded by the scheduled cutting surface of the sheet-like member, and the pushing area of the sheet-like member. An external fixing means for fixing a part of the outer region, and the apparatus includes an integral punching die comprising the punching means, the pushing means, the internal fixing means and the external fixing means, and the punching means Is provided outside the position where the internal fixing means is provided at a position on the integral punching die, and the pushing means is located at a position on the integral punching die from a position where the punching means is provided. The external fixing means is provided outside the position where the pushing means is provided at the position on the integral punching die. By fixing a part of the punching area by the internal fixing means, the support base for each part of the punching means is caused by variation in at least one of the inclination of the support base and the height of the punching means in the punching direction. Even if the time to reach is different and the time when the punched area and the sheet-like member remaining after being punched are different for each part of the punched area, contact between the punching means and the punched area is made. Can be reduced. Further, since the punching means, the push-in means, the internal fixing means, and the external fixing means are provided on the integral punching die, the integral unit is not required without requiring a complicated mechanism and operation. The punching can be performed by a moving mechanism of a target punching die.

  According to the invention, the external fixing means is a member having a sharp tip. Since the external fixing means is a member having a sharp tip, the sheet-like member can be more firmly fixed, and when the cutting is finished and the sheet-like member is contracted to the outside, the punching means and the punching means are formed. Contact with the sheet-like member remaining after being pulled out can be reduced.

  According to the invention, the punching means is a punching blade that can be vibrated by ultrasonic waves so as to vibrate in the punching direction. Even when the sheet-like member is made of a material that is broken or chipped when subjected to an impact at high speed by performing the cutting with the punching blade, the sheet-like member It is possible to reduce the occurrence of cracks and chippings that occur during cutting.

  The embodiment of the present invention will be described by taking the optical film laminate 20c as an example of the laminated sheet-like member. The optical film laminate 20c includes a first optical film, a second optical film, and two sandwiched optical films sandwiched between the first and second optical films, and has four locations on the outer periphery of the optical film laminate 20c. The first and second optical films are joined to each other through a connecting member that is disposed in the same thickness and has the same thickness as the sandwiched optical film and is not coupled to the sandwiched optical film. By configuring the optical film laminate 20c in this way, the optical film can be prevented from easily opening, and dust may enter between the optical films, or the optical film surface may be exposed and scratched on the optical film surface. The possibility of doing so can be reduced. In addition, since the four places on the outer periphery of the optical film laminate 20c are joined, when the suction pad is used for suction, only the uppermost optical film is not sucked, and the suction pad can be used. Furthermore, since the first and second optical films are joined via a connecting member that is not coupled to the sandwiched optical film, the sandwiched optical film can be sandwiched even if there is a difference in expansion due to heat and humidity. Since the optical film is not bonded to the first and second optical films, there is no problem in optical properties such as wrinkling in the optical film laminate 20c. Since the joining member has the same thickness as the sandwiched optical film, the optical film laminate 20c is not distorted and the optical quality is good.

  The manufacturing process of this optical film laminated body 20c is demonstrated. FIG. 1 is a diagram for explaining a process for manufacturing the optical film laminate 20c. The manufacturing process proceeds in the direction of the arrow in the figure.

  First, in the step shown in FIG. 1A, the second film original 70b that is the first film original to be sandwiched and the third film original 70c that is the second film original to be sandwiched are overlapped. Although not shown, it is preferable to ultrasonically weld the overlapped film originals so that the positions of each other do not shift. Here, in FIG. 1, the raw film is drawn as a rectangular sheet for convenience in order to show the manufacturing process. However, a long strip-shaped material wound around a roll is usually drawn out from the roll.

  Next, in the step shown in FIG. 1 (b), a cut is made at a predetermined position of the primary intermediate laminated original 71 which is the laminated original film. The cut portion 72 can be cut with a punching device or the like, and is preferably formed with a press machine or the like having a punching blade selected from Thomson type, Pinnacle type, and engraving blade.

  Next, in the step shown in FIG. 1C, the first film original fabric 70a and the fourth film original fabric 70d are overlapped from above with respect to the cut film original.

  Then, in the step shown in FIG. 1D, the superposed film originals are ultrasonically welded to form a secondary intermediate laminated original 20. The ultrasonic welding position 73 is a position that becomes the tab portion of the product when punched in the next step outside the cut portion 72. The ultrasonic welding is set so that all of the superposed film originals 70a to 70d are welded.

  In the step shown in FIG. 1E, punching is performed at a cutting position 74 in accordance with the ultrasonic welding position 73 with a press machine having a punching blade selected from Thomson type, Pinnacle type, and engraving blade. The laminated raw fabric 20 is divided into a punching region 20a and a remaining film 20b. Finally, in the step shown in FIG. 1 (f), the optical film laminate 20c is obtained by removing the remaining film 20b.

  By passing through the above steps, the uppermost first film and the lowermost second film are joined, and the sandwiched first film and the sandwiched second film are sandwiched between the films, and the sandwiched first film A structure that regulates the outer peripheral position of the film and the sandwiched second film can be realized.

  FIG. 2 is a diagram schematically showing a side surface of the manufacturing apparatus 100 for the optical film laminate 20c. The manufacturing apparatus 100 is an apparatus that realizes the process described in FIG.

  The manufacturing apparatus 100 includes the same number of film originals 70a to 70d as the number of optical films constituting the optical film laminate 20c to be manufactured. In the following, when any one of the unspecified film originals is described, the suffixes a to d are omitted and referred to as a film original 70. The film original fabric 70 is a belt-shaped original fabric, and is prepared as an original fabric roll 7 by being wound in a roll shape.

  The manufacturing apparatus 100 includes a supply means for supplying the film original fabric 70 from the original roll 7, a first ultrasonic welding unit 4 for temporarily fixing the film original fabric 70 supplied by the supply means, and the film original fabric 70. The second ultrasonic welding unit 6 to be permanently fixed, the first cutting means 5 for cutting the original film 70, and the second cutting means 9 for finally punching the optical film laminate 20c are provided.

  The supply means sandwiches the film original fabric 70 with a pair of conveyance rollers (not shown), and rotates the conveyance roller pair so that the film original fabric 70 is fed from the original fabric roll 7 and conveyed so as to move in the longitudinal direction. The 2nd film original fabric 70b is cut | disconnected by the length for the conveyance width of the other film original fabrics 70a, 70c, 70d, and is supplied in the direction orthogonal to the other film original fabrics 70a, 70c, 70d. Although not shown, the film material 70 is attached to the film material 70 by sandwiching the film material 70 with a pressure-sensitive adhesive roller downstream of the means for supplying the film material 70 and downstream of the means for performing each step. It is possible to remove the waste and the attached dust through each step.

  An ultrasonic horn is attached to the tip of the ultrasonic welding units 4 and 6, and an ultrasonic wave is applied while the original film 70 is pressed, so that the pressed part of the original film 70 is ultrasonically bonded. .

  The cutting means 5 and 9 are cutting machines that cut the original film 70. By pressing a punching die having a punching blade selected from, for example, a Thomson die, a pinnacle die, and an engraving blade against the original film 70, desired processing is realized on the original film 70.

  Although not shown, wear of the cutting blades of the cutting means 5 and 9 can be prevented by interposing a carrier tape in the lowermost layer of the original film 70, and also as a means for carrying out the optical film laminate 20c. Can function. For example, it can be wound in the form of a roll in the same manner as the original film 70, supplied by a supply means having the same configuration, and recovered by winding on a roll. The configuration of the material of the carrier tape is not particularly limited, and various types including those conventionally known can be adopted.

  The remaining film 20b is wound around the remaining film take-up roll 8 and collected separately from the optical film laminate 20c.

  The manufacturing apparatus 100 supplies the second film original fabric 70b onto the third film original fabric 70c, and the first ultrasonic welding unit 4 causes the gap between the third film original fabric 70c and the second film original fabric 70b. Ultrasonic welding is performed to form a primary intermediate laminate original 71 in which the second film original 70b is fixed on the third film original 70c.

  Next, the primary intermediate | middle laminated original fabric 71 is conveyed to the 1st cutting means 5, and a notch is provided in a predetermined position. The first film original fabric 70a from above and the fourth film original fabric 70d from below are superimposed on the primary intermediate laminated original material 71 after the cutting process.

  And it conveys to the 2nd ultrasonic welding unit 6 in the state which accumulated the four film original fabrics, and ultrasonic welding of the predetermined position 73 is carried out. As a result, a secondary intermediate laminated original 20 in which the first film original 70a and the fourth film original 70d are joined is formed.

  Finally, the secondary intermediate laminate raw fabric 20 is conveyed to the second cutting means 9 and punched into a predetermined shape to obtain an optical film laminate 20c.

The present invention is a punching method and punching apparatus that can be used for the cutting means 9 described above.
In order to clarify the effect of the present invention, the conventional punching method and punching device will be described first, and the problems with the conventional punching method and punching device will be shown.

  FIG. 3 is a diagram for explaining each step of a punching process using a conventional punching method. Each process proceeds in the direction of the arrow in the figure. Moreover, each figure of FIG. 3 has shown schematically the cross section of the conventional punching apparatus 3 in each process.

  The conventional punching apparatus 3 includes a support base 60 on which a secondary intermediate laminated raw fabric 20 that is a sheet-like member is installed, a punching blade 61 for punching the secondary intermediate laminated raw fabric 20 into a predetermined shape, In order to prevent the secondary intermediate laminate raw material 20 after being punched into a predetermined shape from being lifted up or turned up in a state of being attached to the punching blade 61 after the secondary intermediate laminate raw material 20 has been punched into a predetermined shape. In addition, a stripper 62 for pressing the secondary intermediate laminated original 20 and a punching die 63 provided with a punching blade 61 and a stripper 62 are configured.

  The arrow 21 in FIG. 3A indicates the punching direction, and the intermediate laminated raw material 20 is further upward in the punching direction between the support base 60 and the installed secondary intermediate laminated raw material 20. In the following, terms such as height and top and bottom are used as meanings in the punching direction.

  The stripper 62 may be provided with a mechanism for driving in the vertical direction, but a method of sticking an elastically deformable material such as sponge and rubber to the punching die 63 is widely used, and the tip 62a of the stripper 62 is punched. The blade 61 is installed at a position lower than the tip 61a.

  A punching process using the above-described conventional punching apparatus 3 will be specifically described. Initially, the secondary intermediate | middle laminated original fabric 20 is installed on the support stand 60. FIG. Prior to the installation of the secondary intermediate laminated web 20, the punching die 63 stands by at a position above the support base 60 (FIG. 3A). After the secondary intermediate laminated fabric 20 is installed, the punching die 63 is lowered, and the predetermined position 64 of the secondary intermediate laminated fabric 20 is fixed from above by the stripper 62 (FIG. 3B). Further, the punching die 63 is lowered, and the secondary intermediate laminated sheet 20 is punched by the punching blade 61 (FIG. 3C). At the time of punching, the stripper 62 is elastically deformed to fix the predetermined position 64 more firmly. Therefore, when the cutting of the secondary intermediate laminated sheet 20 by the punching blade 61 is completed, the secondary intermediate laminated sheet 20 is pushed out to both outer sides of the punching blade 61 by the thickness of the punching blade 61, and the predetermined position 64 is punched. The secondary intermediate laminated original 20 in the region sandwiched between the blades 61 is compressed. The compressed secondary intermediate laminate 20 is elastically applied so that the punching region 20a returns to the direction of the arrow 65a and the remaining film 20b attempts to return to the direction of the arrow 65b. It is always in contact with the cut surface of the opposite side.

  The punching die 63 is raised in the above contact state, and the punching blade 61 is separated from the secondary intermediate laminate raw fabric 20 (FIG. 3D). When the punching blade 61 rises in a state where the punching blade 61 and the cut surface of the secondary intermediate laminated web 20 are in contact with each other, friction is generated between the punching blade 61 and the cut surface of the secondary intermediate laminated web 20. Since the predetermined position 64 is fixed, it is possible to prevent the secondary intermediate laminate raw material 20 from being turned up, but there is a problem that dust is generated due to the friction.

  The present invention is a punching method and a punching device capable of reducing the dust. FIG. 4 is a schematic view schematically showing an end face of the punching device 1 according to the first embodiment of the present invention. 5A is a bottom view of each die of the punching device 1 shown in FIG. 5B, and FIG. 5C is a plane of the secondary intermediate laminate raw material 20 shown in FIG. 5B. FIG.

  The punching device 1 includes a support base 10 on which a secondary intermediate laminate raw fabric 20 that is a sheet-like member is installed, a punching blade 12 that is a punching means for punching the secondary intermediate laminate raw fabric 20 into a predetermined shape, and A punching die 13 provided with a punching blade 12, a pushing die 14 as a pushing means for pushing the secondary intermediate laminated raw fabric 20 as an external force applying means, a pushing die 15 provided with the pushing portion 14, and a secondary intermediate lamination. An internal fixing part 16 that is an internal fixing means for fixing the inside of the original fabric 20, an internal fixing mold 17 provided with the internal fixing portion 16, and an external fixing means for fixing the outside of the secondary intermediate laminated raw material 20. And an external fixing mold 19 provided with the external fixing portion 18.

  The arrow 21 in FIGS. 4 and 5 indicates the punching direction. In the punching direction, the intermediate laminated original 20 is further above the support base 10 and the installed secondary intermediate laminated original 20. In the following, terms such as height and top and bottom are used as meanings in the punching direction.

  The support base 10 is provided with a pushing space 11 which is a predetermined space. It is preferable that the pushing space 11 is sufficiently larger than the pushing portion 14. Moreover, it is preferable that the indentation space 11 has sufficient height. The same material as that used for the conventional support table can be used for the support table 10.

  The punching blade 12 is manufactured by cutting a steel material, a Thomson blade that is a straight blade shape that is manufactured so as to be embedded in the punching die 13, a pinnacle blade that is manufactured by etching a steel material, and a steel material. You can choose from engraving blades. In the present invention, since the same effect can be obtained regardless of the type of the punching blade 12, the punching blade 12 may be selected according to the material and required quality of the secondary intermediate laminate raw material 20. Further, it is preferable that the punching blade 12 can be vibrated by ultrasonic waves so that the punching blade 12 can vibrate in the punching direction to cut the secondary intermediate laminate raw material 20. The punching blade 12 has a closed shape, and is provided so as to cut the secondary intermediate laminated raw material 20 at the planned cutting surface 22. The planned cutting surface 22 is a surface parallel to the punching direction, and is a virtual surface that will later become a cutting surface. A region surrounded by the planned cutting surface 22 is a punching region 20a.

  The arrangement of the pushing portions 14 may be dot-like, linear as shown in FIG. 5C, or continuous according to the shape of the punching region 20a. What is necessary is just to select the optimal number and arrangement | positioning of the pushing parts 14 according to the shape and magnitude | size of the punching area | region 20a. Moreover, it is preferable that the front-end | tip 14a of the pushing part 14 is a shape which is not sharp. The material used for the push-in portion 14 may be any material having a rigidity that does not deform during push-in, and an optimum material may be selected according to the material of the secondary intermediate laminate raw material 20. For example, PEEK (polyether-etherketon) material, NC nylon, or the like can be used. When the sheet-like member is a hard material, ceramic, stainless steel, or the like can also be used. A region of the secondary intermediate laminated raw material 20 into which the pushing unit 14 pushes is a pushing region 24.

  The arrangement of the internal fixing part 16 and the external fixing part 18 may be dot-like, linear, or continuous according to the shape of the punching region 20a. What is necessary is just to select the optimal number and arrangement | positioning of the internal fixing | fixed part 16 and the external fixing | fixed part 18 according to the shape and magnitude | size of the punching area | region 20a. The material used for the portion excluding the front end portion 16a of the internal fixing portion 16 and the external fixing portion 18 may be any material that has a rigidity that does not cause deformation during fixation, depending on the material of the secondary intermediate laminate raw material 20 Select the most suitable one. For example, PEEK (polyether-etherketon) material, NC nylon, or the like can be used. When the sheet-like member is a hard material, ceramic, stainless steel, or the like can also be used. Further, the tip 18a of the external fixing portion 18 is preferably sharp, but when the friction with the sheet-like member is small and slipping easily occurs, a nitrile rubber or the like having a high friction coefficient is used even if it is flat. Can be used. It is preferable to use a material having a high coefficient of friction that is elastically deformed, such as rubber, for the distal end portion 16a of the internal fixing portion 16.

  The area fixed by the internal fixing part 16 is called an internal fixing area 27a, and the area fixed by the external fixing part 18 is called an external fixing area 27b. The fixed area includes an internal fixed area 27a and an external fixed area 27b. As shown in FIG. 5C, the internal fixing area 27a is an area in the punching area 20a, and as shown in FIG. 5C, the external fixing area 27b is an area outside the planned cutting surface 22.

  The punching die 13, the pushing die 15, the internal fixing die 17 and the external fixing die 19 can be moved independently in the vertical direction by control means (not shown). Control means (not shown) can control the timing and speed of moving each mold. Further, as shown in FIG. 5, a punching die 13 is disposed outside the internal fixed die 17, a pushing die 15 is disposed outside the punching die 13, and an external fixing die 19 is disposed outside the pushing die 15. What is necessary is just to select the optimal space | interval of each type | mold according to the magnitude | size of the punching area | region 20a, a shape, and the material of the secondary intermediate | middle laminated raw material 20. FIG. In addition, the same material as that used for the conventional punching die can be used for each die.

  FIG. 6 is a view for explaining the punching process of the first embodiment. 6A is a diagram for explaining the fixing process, FIG. 6B is a diagram for explaining the external force applying process, and FIG. 6C is a diagram for explaining the cutting process. The punching process proceeds in the direction of the arrow in the figure. . Moreover, each figure of FIG. 6 has shown roughly the end surface of the punching apparatus 1 of this invention in each process.

  Prior to the start of the fixing process, the secondary intermediate laminate raw fabric 20 is installed on the support base 10. At this time, the punching die 13, the push-in die 15, the internal fixed die 17 and the external fixed die 19 are waiting above the support 10.

  A fixing process is performed after the secondary intermediate | middle laminated original fabric 20 is installed on the support stand 10 (Fig.6 (a)). The fixing step is a step of fixing the fixing region. In the fixing process of the first embodiment, the internal fixing die 17 and the external fixing die 19 are lowered to start fixing the internal fixing region 27a and the external fixing region 27b, respectively. And the descent | fall of the external fixed mold | type 19 is stopped, and fixation of a fixed area | region is maintained by maintaining each height. The start of fixing is the time when the fixed region becomes unable to be displaced by a certain distance or more, and the end of fixing is the time when the fixed region becomes displaceable by a certain distance or more again. That is, in the first embodiment, the time point at which the fixing region of the secondary intermediate layer raw fabric 20 on the support base 10 cannot be shifted left and right is the start of fixing, and the time point at which the fixing region can be shifted again. This is the end of fixing. After the inner fixing part 16 and the outer fixing part 18 are in contact with the secondary intermediate laminate raw material 20, respectively, the inner fixing part 16 and the outer fixing part 19 start fixing when the inner fixing mold 17 and the outer fixing mold 19 are lowered by a certain distance. The height of the external fixing part 18 can be adjusted.

  An external force application process is performed after the start of the fixing process (FIG. 6B). The external force imparting step is a step of imparting an external force to the secondary intermediate laminate raw material 20 so as to generate tension on the planned cutting surface 22 on the entire planned cutting surface 22.

  The elastic intermediate deformable secondary intermediate laminate 20 is deformed without being destroyed when an external force is applied, and returns to its original shape when the external force is removed. In a state where an external force is applied to the secondary intermediate laminate raw fabric 20, stress is generated in the secondary intermediate laminate original fabric 20 by an elastic force so as to balance the external force. When a certain point on the planned cutting surface 22 is considered, the stress at that point can be decomposed into a vertical component and a parallel component with respect to the planned cutting surface 22, and the force of the vertical component away from the surface is tension. It is. When the stress generated at a certain point on the planned cutting surface 22 is a tension with respect to the planned cutting surface 22, this means that the point is pulled from both sides of the planned cutting surface 22. Further, the entire planned cutting surface 22 means all points on the planned cutting surface. That is, the tension to the cutting planned surface 22 is generated on the entire cutting planned surface 22 means that the secondary intermediate laminate raw fabric 20 is pulled from both sides of the cutting planned surface 22 and deformed so as to extend. is there.

  In the external force application process of the first embodiment, the pushing die 15 is moved down to move the pushing portion 14 in the direction of the pushing space 11 to start pushing the pushing area 23, and the entire cutting scheduled surface 22 is cut to the cutting scheduled surface 22. When the tension with respect to 22 is generated, the lowering of the pressing die 15 is stopped and the height of the pressing die 15 is maintained, so that the tension is maintained. The start of pushing is when the pushing portion 14 comes into contact with the secondary intermediate laminate raw fabric 20, and the end of pushing is when the pushing portion 14 is separated from the secondary intermediate laminate raw fabric 20 again.

  In the first embodiment, as shown in FIG. 5C, the line segment 25a connecting the two points 26a and the line segment 25b connecting the two points 26b are areas outside the punched region 20a. Since the area including all the four points 26 a and 26 b orthogonal to the center of gravity 24 is used as the indentation area 24, sufficient tension is applied to the planned cutting surface 22 over the entire planned cutting surface 22.

  In a state where the fixing and the application of the external force are performed, a cutting process is started, and the secondary intermediate laminated raw fabric 20 is cut (FIG. 6C). In the cutting process of the first embodiment, the punching die 13 is moved down to start cutting the secondary intermediate laminated sheet 20 on the planned cutting surface 22, and the punching die 13 is moved until the punching blade 12 reaches the support base. Further, the cutting is finished by lowering and punching into a predetermined shape. The start of cutting is the time when the punching blade 12 comes into contact with the secondary intermediate laminated raw material 20, and the end of cutting is the time when the punching region 20a and the remaining film 20b are divided by the punching blade 12. Moreover, in 1st Embodiment, it is called punching until the punching blade 12 between the punching area | region 20a and the remaining film 20b is spaced apart from the secondary intermediate | middle laminated original fabric 20 by the fixed distance from the said cutting start.

  As described above, since the tension to the cutting planned surface 22 is generated on the entire cutting planned surface 22, when the secondary intermediate layer 20 is cut on the cutting planned surface 22, the punching region 20 a is surrounded by the cutting surface. It becomes an area and shrinks inward. In the first embodiment, since the internal fixing region 27a is fixed, at least one of the inclination of the support base 10 and the height of the punching blade 12 varies and reaches the support base 10 for each part of the punching blade 12. Even if the timing is different and the timing at which the punching region 20a and the remaining film 20b start to separate differs for each portion of the punching region 20a, the punching region 20a does not move so as to contact the punching blade 12.

  Further, after the cutting is completed, the remaining film 20b shrinks in the direction of the external fixing region 27b. In the first embodiment, as shown in FIG. 5C, a line segment 25a connecting the two points 28a and a line segment 25b connecting the two points 28b are areas outside the push-in area 24. Since the region including all the four points 28a and 28b orthogonal to the center of gravity 24 is fixed as the external fixing region 27b, when the residual film 20b tries to shrink after the end of the cutting, the punching blade 12 and the residual film There is no contact with 20b.

  FIG. 7 is a view showing a part of the punching apparatus 1 from the end of the cutting of the secondary intermediate laminated web 20 to the end of punching. The punching proceeds in the direction of the arrow in FIG.

  As shown in FIG. 7A, when the punching blade 12 reaches the support base 10 and the cutting of the secondary intermediate laminated original 20 is finished, the secondary intermediate laminated original 20 tries to shrink due to the elastic force. The punching region 20a shrinks in the direction of the arrow 29a that is the inner direction. The remaining film 20b shrinks in the direction of the arrow 29b, which is the outer direction. Therefore, as shown in FIG. 7B, the cut surface 30 and the punching blade 12 are not in contact with each other. Since the punching blade 12 rises in this state, as shown in FIG. 7C, the punching blade 12 and the cutting surface 30 do not come into contact with each other, and the punching can be finished.

  Therefore, according to 1st Embodiment, since friction does not arise between the punching blade 12 and the cut surface 30, dust does not generate | occur | produce and the display quality of an optical film can be maintained.

  In the fixing step, by using the punching device 1 using a material having a high coefficient of friction that is elastically deformed, such as rubber, at the distal end portion 16a of the internal fixing portion 16, the internal fixing region can be formed without causing indentation or scratches on the punching region 20a. 27a can be fixed. In addition, by using the punching device 1 in which the tip 18a of the external fixing portion 18 has a sharp shape, the external fixing region 27b can be more firmly fixed.

  In the external force applying step, preferably, the pushing is started after the fixing is started. By performing the pushing after the start of the fixing, it is possible to reduce the deviation of the punching region 20a on the support 10 and perform the punching more precisely.

  Further, in the external force applying step, in order to sufficiently generate the tension, the pressing die 15 is lowered and pushed so that the tip 14a of the pushing portion 14 is positioned lower than the entire cutting scheduled surface 22. preferable. In order to perform such pushing, the pushing die 15 can move sufficiently downward, and the pushing space 11 of the support base 10 needs to be sufficiently larger than the pushing portion 14 and has a sufficient height. . Moreover, when performing such pushing, it is preferable to make the tip 14a of the pushing part 14 into the shape which is not sharp so that the pushing part 14 may not penetrate the secondary intermediate | middle laminated original fabric 20. FIG.

  In the external force applying step, the tension is generated by the pushing, but the secondary intermediate layer 20 is directly pulled in a direction parallel to the surface of the secondary intermediate layer 20 without performing the pushing. Thus, the tension may be generated.

  In the cutting step, it is preferable to continue the fixing and the pushing from the end of the cutting to the end of the punching in order to make the friction between the punching blade 12 and the cutting surface 30 less likely to occur. Further, when the secondary intermediate layer 20 is made of a material that will crack or chip when subjected to an impact at high speed, the punching blade 12 is vibrated up and down by ultrasonic waves. It is preferable to perform cutting.

  Next, the punching apparatus 2 of 2nd Embodiment of this invention is demonstrated. FIG. 8 is a schematic view schematically showing an end face of the punching device 2. 9A is a bottom view of the integral punching die of the punching device 2 shown in FIG. 9B, and FIG. 9C is the secondary intermediate laminate raw material 20 shown in FIG. 9B. It is a top view.

  The punching device 2 includes a support base 10 on which a secondary intermediate laminate raw fabric 20 that is a sheet-like member is installed, and a punching blade 40 that is a punching means for punching the secondary intermediate laminate raw fabric 20 into a predetermined shape. As the external force applying means, a pushing portion 41 that is a pushing means for pushing the secondary intermediate laminated raw fabric 20 and an internal fixing portion 42 that is an internal fixing means for fixing the inside of the secondary intermediate laminated raw fabric 20 An integral punching die provided with an external fixing portion 43 that is an external fixing means for fixing the outer side of the secondary intermediate laminated raw fabric 20, a punching blade 40, a pushing portion 41, an internal fixing portion 42, and an external fixing portion 43. 44.

  The arrow 21 in FIGS. 8 and 9 indicates the punching direction. In the punching direction, the intermediate laminated original 20 is further above the support base 10 and the installed secondary intermediate laminated original 20. In the following, terms such as height and top and bottom are used as meanings in the punching direction.

  The support base 10 is provided with a pushing space 11 which is a predetermined space. It is preferable that the pushing space 11 is sufficiently larger than the pushing portion 41. Moreover, it is preferable that the indentation space 11 has sufficient height. The same material as that used for the conventional support table can be used for the support table 10.

  The punching blade 40 is manufactured by cutting a steel material, a Thomson blade that is a straight blade shape manufactured so as to be embedded in the integral punching die 44, a pinnacle blade that is manufactured by etching a steel material, and a steel material. Can be selected from engraving blades. In the present invention, since the same effect can be obtained regardless of the type of the punching blade 40, the punching blade 40 may be selected according to the material and required quality of the secondary intermediate laminate raw material 20. Moreover, it is preferable that the punching blade 40 can be vibrated by ultrasonic waves so that the punching blade 40 can vibrate in the punching direction to cut the secondary intermediate laminate raw material 20. When the vibration is applied by ultrasonic waves, a cushioning material is provided between the integral punching die 44 and the punching blade 40, the pushing portion 41, the internal fixing portion 42, and the external fixing portion 43, thereby integrally punching. The influence of vibration on members other than the punching blade 40 provided in the mold 44 can be reduced. Further, the use of a material such as rubber and sponge for the internal fixing portion 42 can further reduce the influence. The punching blade 40 has a closed shape, and is provided so as to cut the secondary intermediate laminated raw material 20 along the planned cutting surface 22. The planned cutting surface 22 is a surface parallel to the punching direction, and is a virtual surface that will later become a cutting surface. A region surrounded by the planned cutting surface 22 is a punching region 20a.

The arrangement of the pushing portions 41 may be dot-like, linear as shown in FIG. 9C, or continuous according to the shape of the punching region 20a. What is necessary is just to select the optimal number and arrangement | positioning of the pushing parts 41 according to the shape and magnitude | size of the punching area | region 20a. Moreover, it is preferable that the front-end | tip 41a of the pushing part 41 is a shape which is not sharp. The material used for the push-in portion 41 may be any material as long as it has a rigidity that does not deform during push-in, and an optimum material may be selected according to the material of the secondary intermediate laminate raw material 20. For example, PEEK (
polyether-etherketon) material, NC nylon, or the like can be used. When the sheet-like member is a hard material, ceramic, stainless steel, or the like can also be used. The area of the secondary intermediate layer 20 that is pushed by the pushing portion 41 is the pushing area 45.

  A part of the internal fixing part 42 and the external fixing part 43 are spring parts 42a and 43a, respectively, and the internal fixing part 42 and the external fixing part 43 are configured to be displaceable in the punching direction. What is necessary is just to select the optimal material used for the spring parts 42a and 43a according to the magnitude | size of the punching area | region 20a, a shape, and the material of the secondary intermediate | middle laminated raw material 20. FIG.

  The arrangement of the internal fixing portion 42 and the external fixing portion 43 may be dot-like, linear, or continuous according to the shape of the punching region 20a. What is necessary is just to select the optimal number and arrangement | positioning of the internal fixing | fixed part 42 and the external fixing | fixed part 43 according to the shape and magnitude | size of the punching area | region 20a. As a material used for the part excluding the spring part 42a and the tip part 42b of the internal fixing part 42 and the part excluding the spring part 43a of the external fixing part 43, any material may be used as long as it has a rigidity that does not cause deformation during fixation. What is necessary is just to select an optimal thing according to the material of the secondary intermediate | middle laminated original fabric 20. FIG. For example, PEEK (polyether-etherketon) material, NC nylon, or the like can be used. When the sheet-like member is a hard material, ceramic, stainless steel, or the like can also be used. Further, the tip 18a of the external fixing portion 18 is preferably sharp, but when the friction with the sheet-like member is small and slipping easily occurs, a nitrile rubber or the like having a high friction coefficient is used even if it is flat. Can be used. It is preferable to use a material having a high coefficient of friction that is elastically deformed, such as rubber, for the distal end portion 16a of the internal fixing portion 16.

  The area fixed by the internal fixing part 42 is called an internal fixing area 48a, and the area fixed by the external fixing part 43 is called an external fixing area 48b. The fixed area includes an internal fixed area 48a and an external fixed area 48b. As shown in FIG. 9C, the internal fixing region 48a is a region in the punching region 20a, and as shown in FIG. 9C, the external fixing region 48b is a region outside the planned cutting surface 22.

  The integral punching die 44 can be moved in the vertical direction by a control means (not shown). Control means (not shown) can control the timing and speed at which the integral punching die 44 is moved. Further, as shown in FIG. 9, at the position on the integral punching die 44, the punching blade 40 is outside the internal fixing portion 42, the pushing portion 41 is outside the punching blade 40, and the external fixing portion 43 is outside the pushing portion 41. Is placed. As shown in FIG. 9, when nothing is in contact with the tips of the respective members, the tip 40a of the punching blade 40 is at the highest position, and the next highest position is the tip of the pushing portion 41. 41a. What is necessary is just to select the optimal thing for the space | interval and height of each member according to the magnitude | size and shape of the punching area | region 20a, and the material of the secondary intermediate | middle laminated raw fabric 20. FIG. Further, the integral punching die 44 can be made of the same material as that used for the conventional punching die.

  FIG. 10 is a diagram for explaining the punching process of the second embodiment. 10A is a diagram for explaining the fixing process, FIG. 10B is a diagram for explaining the external force applying process, and FIG. 10C is a diagram for explaining the cutting process, and the punching process proceeds in the direction of the arrow in the figure. . Moreover, each figure of FIG. 10 has shown roughly the end surface of the punching apparatus 2 of this invention in each process.

  Prior to the start of the fixing process, the secondary intermediate laminate raw fabric 20 is installed on the support base 10. At this time, the integral punching die 44 stands by above the support 10.

  After the secondary intermediate laminated raw fabric 20 is installed on the support base 10, a fixing step is performed (FIG. 10 (a)). The fixing step is a step of fixing the fixing region. In the fixing process of the second embodiment, the internal punching die 44 is lowered to start fixing the internal fixing region 48a and the external fixing region 48b, and the integrated punching die 44 continues to descend even after the start of fixing. , Keep the fixed area fixed. The start of fixing is the time when the fixed region becomes unable to be displaced by a certain distance or more, and the end of fixing is the time when the fixed region becomes displaceable by a certain distance or more again. That is, in the second embodiment, the time point at which the fixing region of the secondary intermediate layer raw fabric 20 on the support base 10 cannot be shifted left and right is the start of fixing, and the time point at which the fixing region can be shifted again. This is the end of fixing. After the internal fixing part 42 and the external fixing part 43 are in contact with the secondary intermediate laminate 20, the internal fixing part 42 and the external fixing part 43 are set so as to start fixing when the integral punching die 44 is lowered by a certain distance. The height can be adjusted.

  In the punching device 2, the tip end portion 42 b of the inner fixing portion 42 and the tip end 43 b of the outer fixing portion 43 are positioned lower than the tip end 41 a of the pushing portion 41 and the tip end 40 a of the punching blade 40. Then, the fixing process is started first.

  An external force applying step is performed after the start of the fixing step (FIG. 10B). The external force imparting step is a step of imparting an external force to the secondary intermediate laminate raw material 20 so as to generate tension on the planned cutting surface 22 on the entire planned cutting surface 22.

  The elastic intermediate deformable secondary intermediate layer 20 is deformed without being destroyed when an external force is applied, and returns to its original shape when the external force is removed. In a state where an external force is applied to the secondary intermediate laminate raw fabric 20, stress is generated in the secondary intermediate laminate original fabric 20 by an elastic force so as to balance the external force. When a certain point on the planned cutting surface 22 is considered, the stress at that point can be decomposed into a vertical component and a parallel component with respect to the planned cutting surface 22, and the force of the vertical component away from the surface is tension. It is. When the stress generated at a certain point on the planned cutting surface 22 is a tension with respect to the planned cutting surface 22, this means that the point is pulled from both sides of the planned cutting surface 22. Further, the entire cutting planned surface 22 means all points on the cutting planned surface 22. That is, the tension to the cutting planned surface 22 is generated on the entire cutting planned surface 22 means that the secondary intermediate laminate raw fabric 20 is pulled from both sides of the cutting planned surface 22 and deformed so as to extend. is there.

  In the external force application process of the second embodiment, the integral punching die 44 that has been lowered by the fixing process is further lowered to move the pushing portion 41 toward the pushing space 11 and the pushing of the pushing area 45 is started. Since the inner fixing portion 42 and the outer fixing portion 43 have spring portions 42a and 43a, respectively, even after the fixing starts, the spring portions 42a and 43a are contracted in the punching direction, so that the integrated punching die 44 is further formed. It can be lowered and such pushing can be performed. Even after the tension to the cutting planned surface 22 is generated on the entire cutting planned surface 22, the integral punching die 44 continues to be lowered and the tension is continuously generated. The start of pushing is when the pushing portion 41 comes into contact with the secondary intermediate laminate raw fabric 20, and the end of pushing is when the pushing portion 41 is separated from the secondary intermediate laminate raw fabric 20 again.

  In the punching device 2, the tip 41 a of the pushing portion 41 is located higher than the tip 42 b of the inner fixing portion 42 and the tip 43 b of the outer fixing portion 43 and lower than the tip 40 a of the punching blade 40. Is lowered, the external force applying step is started after the fixing step is started.

  In the second embodiment, as shown in FIG. 9 (c), a line segment 46a connecting the two points 47a and a line segment 46b connecting the two points 47b are areas outside the punched region 20a. Since the region including all the four points 47 a and 47 b orthogonal to the center of gravity 24 is used as the pressing region 45, sufficient tension is generated on the planned cutting surface 22 on the entire planned cutting surface 22.

  In a state where the fixing and the application of the external force are performed, a cutting process is started, and the secondary intermediate laminate raw fabric 20 is cut (FIG. 10C). In the cutting process of the second embodiment, the integrated punching die 44 that has been lowered by the external force applying process is further lowered to start cutting the secondary intermediate laminated sheet 20 on the planned cutting surface 22. Since the inner fixing portion 42 and the outer fixing portion 43 have spring portions 42a and 43a, respectively, even after the tension is generated, the spring portions 42a and 43a are contracted in the punching direction, so that the integrated punching die 44 is further removed. Can be lowered and such cutting can be performed. The cutting is finished by further lowering the integral punching die 44 until the punching blade 40 reaches the support base, and punching into a predetermined shape. The start of cutting is the time when the punching blade 12 comes into contact with the secondary intermediate laminated raw material 20, and the end of cutting is the time when the punching region 20a and the remaining film 20b are divided by the punching blade 12. Moreover, in 2nd Embodiment, it is called punching until the punching blade 40 between the punching area | region 20a and the remaining film 20b is spaced apart from the secondary intermediate | middle laminated raw fabric 20 for a fixed distance from the said cutting start.

  In the punching device 2, the tip 40 a of the punching blade 40 is located higher than the tip 42 b of the internal fixing portion 42, the tip 43 b of the external fixing portion 43, and the tip 41 a of the pushing portion 41. When lowered, the cutting step is started after the start of the fixing step and the external force applying step. It is necessary to adjust the height of the tip 40a of the punching blade 40 so that the cutting is started in the state where the fixing and the external force are applied.

  As described above, since the tension to the cutting planned surface 22 is generated on the entire cutting planned surface 22, when the secondary intermediate layer 20 is cut on the cutting planned surface 22, the punching region 20 a is surrounded by the cutting surface. It becomes an area and shrinks inward. In the second embodiment, since the internal fixing region 48a is fixed, at least one of the inclination of the support base 10 and the height of the punching blade 40 varies and reaches the support base 10 for each part of the punching blade 12. Even if the timing is shifted and the timing at which the punching region 20a and the remaining film 20b start to be separated differs for each portion of the punching region 20a, the punching region 20a does not move so as to contact the punching blade 40.

  Further, after the cutting is completed, the remaining film 20b shrinks in the direction of the external fixing region 48b. In the second embodiment, as shown in FIG. 9C, a line segment 46a connecting the two points 49a and a line segment 46b connecting the two points 49b, which are areas outside the push-in area 45, are the punching area 20a. Since the region including all four points 49a and 49b orthogonal to the center of gravity 24 is fixed as the external fixing region 48b, the punching blade 40 and the remaining film are used when the remaining film 20b is to be shrunk after the end of the cutting. There is no contact with 20b.

  Also in the second embodiment, punching proceeds as in the first embodiment described with reference to FIG.

  Similarly to FIG. 7A, when the punching blade 40 reaches the support base 10 and the cutting of the secondary intermediate laminated original 20 is finished, the secondary intermediate laminated original 20 tries to shrink due to the elastic force. The punching region 20a shrinks in the inner direction. The remaining film 20b shrinks outward. Therefore, as in FIG. 7B, the cut surface and the punching blade 40 are not in contact with each other. Since the punching blade 40 is raised in this state, the punching can be finished without the punching blade 40 and the cut surface being in contact with each other, as in FIG. 7C.

  Therefore, according to 2nd Embodiment, since friction does not arise between the punching blade 40 and a cut surface, dust does not generate | occur | produce and the display quality of an optical film can be maintained.

  In the fixing step, by using the punching device 2 using a material having a high coefficient of friction that is elastically deformed, such as rubber, at the distal end portion 42b of the internal fixing portion 42, the internal fixing region is not indented or scratched. 48a can be fixed. In addition, by using the punching device 2 in which the tip 43b of the external fixing portion 43 has a sharp shape, the external fixing region 48b can be more firmly fixed.

  In the external force applying step, preferably, the pushing is started after the fixing is started. In order to perform such pushing, it is necessary to adjust the height of the tip 41a of the pushing portion 41. By performing the pushing after the start of the fixing, it is possible to reduce the deviation of the punching region 20a on the support 10 and perform the punching more precisely.

  Further, in the external force applying step, in order to sufficiently generate the tension, the pressing die 15 is lowered and pushed so that the tip 14a of the pushing portion 14 is positioned lower than the entire cutting scheduled surface 22. preferable. In order to perform such pushing, it is necessary to adjust the height of the tip 41a of the pushing portion 41 and the height of the tip 40a of the punching blade 40. Further, the integral punching die 44 can move sufficiently downward, and the pushing space 11 of the support base 10 needs to be sufficiently larger than the pushing portion 41 and has a sufficient height. Moreover, when performing such pushing, it is preferable that the front-end | tip 41a of the pushing part 41 is made into the shape which is not sharp so that the pushing part 41 may not penetrate the secondary intermediate | middle laminated original fabric 20. FIG.

  In the external force applying step, the tension is generated by the pushing, but the secondary intermediate layer 20 is directly pulled in a direction parallel to the surface of the secondary intermediate layer 20 without performing the pushing. Thus, the tension may be generated.

  In the cutting step, it is preferable to continue the fixing and the pushing from the end of the cutting to the end of the punching in order to make the friction between the punching blade 12 and the cutting surface 30 less likely to occur. For this purpose, it is necessary to adjust the height of the tip 40a of the punching blade 40. Further, when the secondary intermediate layer 20 is made of a material that will crack or chip when subjected to an impact at high speed, the punching blade 12 is vibrated up and down by ultrasonic waves. It is preferable to perform cutting.

It is a figure for demonstrating the process for manufacturing the optical film laminated body 20c. It is a figure which shows schematically the side surface of the manufacturing apparatus 100 of the optical film laminated body 20c. It is a figure for demonstrating each process of the punching process using the conventional punching method. It is a schematic diagram which shows roughly the end surface of the punching apparatus 1 of 1st Embodiment of this invention. FIG. 2 is a view showing a schematic view of the punching device 1, a bottom view of each die of the punching device 1, and a plan view of the secondary intermediate laminated sheet 20. It is a figure for demonstrating the punching process of 1st Embodiment. It is a figure which shows a part of punching apparatus 1 after completion | finish of a punching after the completion | finish of a cutting | disconnection of the secondary intermediate | middle laminated fabric 20. FIG. It is a schematic diagram which shows roughly the end surface of the punching apparatus 2 of 2nd Embodiment of this invention. FIG. 2 is a view showing a schematic view of the punching device 2, a bottom view of the integral punching die 44, and a plan view of the secondary intermediate laminated original 20. It is a figure for demonstrating the punching process of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 Punching device 10 Support base 11 Pushing space 12 Punching blade 13 Punching die 14 Pushing part 15 Pushing type 16 Internal fixing part 16a Tip part of internal fixing part 17 Internal fixing type 18 External fixing part 19 External fixing type 20 Secondary Intermediate laminated fabric

Claims (15)

A method of punching an elastically deformable sheet-like member into a predetermined shape,
A fixing step of fixing the fixing region including at least the region outside the planned cutting surface of the sheet-like member;
An external force applying step for applying an external force to the sheet-like member so as to generate tension on the planned cutting surface over the entire planned cutting surface after the fixing step is started;
Punching of the sheet-like member, comprising: a cutting step in which the fixing and the sheet-like member in a state where the external force is applied are cut by a punching means on the planned cutting surface. Method.   The sheet-like member punching method according to claim 1, wherein the sheet-like member is a laminated sheet-like member.   The said external force provision process provides the said external force by pushing in the pushing area | region of this sheet-like member installed in the support stand for supporting the said sheet-like member by pushing means. Item 3. A method for punching a sheet-like member according to Item 1 or 2. The fixed region is a part of a punching region that is a region surrounded by the planned cutting surface of the sheet-like member;
The sheet-like member is an area outside the indentation area, and includes an area including four points connecting two points orthogonal to each other at the center of gravity of the punching area. 4. A method for punching a sheet-like member according to 3.   5. The sheet-like member punching method according to claim 3, wherein the pushing is performed after the fixing is started.   The indentation area is an area outside the punching area of the sheet-like member, and is an area including four points where line segments connecting two points are orthogonal to each other at the center of gravity of the punching area. The punching method of the sheet-like member according to any one of claims 3 to 5.   The said pushing is performed by moving the said pushing means to the position where the front-end | tip of the said pushing means becomes lower in the punching direction than the said whole cutting plan surface. A method for punching a sheet-like member.   The method for punching a sheet-like member according to any one of claims 3 to 7, wherein the fixing and the pressing are continued until the end of the punching.   The sheet-like member according to any one of claims 1 to 8, wherein the cutting is performed using a punching blade that vibrates in a punching direction when vibrated by ultrasonic waves as the punching means. Punching method. A punching device for punching an elastically deformable sheet-like member into a predetermined shape,
A fixing means for fixing a fixing region including at least a region outside the planned cutting surface of the sheet-like member;
An external force applying means for applying an external force to the sheet-like member so as to generate a tension on the planned cutting surface over the entire planned cutting surface;
Punching means for cutting by cutting the sheet-like member at the planned cutting surface,
An apparatus for punching a sheet-like member, characterized in that the cutting can be performed in a state where the fixing and the external force are applied. Including a support for installing the sheet-like member;
The support base has a predetermined space;
The sheet according to claim 10, wherein the external force applying unit is a pressing unit that is movable so as to press a pressing region of the sheet-like member installed on the support base in the direction of the predetermined space. Punching device. The fixing means includes an internal fixing means for fixing a part of a punching area which is an area surrounded by the scheduled cutting surface of the sheet-like member, and a part of an area outside the pushing area of the sheet-like member. And an external fixing means for fixing
The apparatus includes an internal fixing mold having the internal fixing means, a punching mold having the punching means provided outside the internal fixing mold, and a pressing mold having the pushing means provided outside the punching mold. The punching device for sheet-like members according to claim 11, further comprising: an external fixing die provided on the outer side of the pressing die and provided with the external fixing means. The fixing means includes an internal fixing means for fixing a part of a punching area which is an area surrounded by the scheduled cutting surface of the sheet-like member, and a part of an area outside the pushing area of the sheet-like member. And an external fixing means for fixing
The apparatus includes an integral punching die comprising the punching means, the pushing means, the internal fixing means and the external fixing means,
The punching means is provided outside the position where the internal fixing means is provided at a position on the integral punching die,
The pushing means is provided outside the position where the punching means is provided at a position on the integral punching die,
12. The sheet-like member punching device according to claim 11, wherein the external fixing means is provided outside the position where the pushing means is provided at a position on the integral punching die.   The sheet-shaped member punching device according to claim 12 or 13, wherein the external fixing means is a member having a sharp tip.   The punching device for a sheet-like member according to any one of claims 10 to 14, wherein the punching means is a punching blade that can be vibrated by ultrasonic waves so as to vibrate in the punching direction. .

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