JP2010143120A - Rolled paper holding flange and rolled sheet cartridge using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolled paper holding flange by which a rolled sheet is not damaged and not caught and torn. <P>SOLUTION: The rolled paper holding flange 2 includes a bottom 210 facing the width direction end surface of the rolled sheet R, a brim 201 arising from the bottom 210 toward the width direction inside of the rolled sheet R, and at least one notch 206 formed at the brim 201. The brim 201 for the rolled sheet R is formed in a U-shape in a cross section with an inner circumference 208b holding a part positioned inside the brim 201, an outer circumference 208a holding a part positioned outside, and a crown 207 which connects upper ends of the inner and outer circumferences with each other and has a predetermined curvature radius. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a member for holding long paper (roll paper) wound in a roll shape.

In recent years, printers that take in image data acquired by an imaging device such as a digital camera and print it on a recording medium such as photographic paper have been widely used in general households. In such a home printer, it is required to simplify preparatory work such as setting an ink ribbon and photographic paper and capturing image data as much as possible, and the purpose is to improve operability in the preparatory work. Proposals have been made. For example, Patent Document 1 discloses a printer including a cartridge in which an ink ribbon and photographic paper are integrated. If the cartridge is used, the two operations of mounting the ink ribbon and the mounting of the photographic paper, which have been performed separately until now, are only one operation of mounting the integrated cartridge, and the preparation work is simplified. Is achieved.
JP 2000-108442 A

  In the cartridge as described above, it is common to use cut paper as photographic paper. However, it is also conceivable to use roll paper instead of cut paper as the photographic paper. This is because when roll paper is used as the photographic paper, a large amount of photographic paper can be held in a small cartridge, and the conveyance mechanism can be shared for recording papers having different print sizes.

  On the other hand, in photo printing, so-called “borderless printing” is desired in which there is no margin around the printed image. Accordingly, the presence / absence of a print margin in cut paper and roll paper will be described with reference to FIG.

  When printing is performed using cut paper, as shown in FIG. 7A, the printing paper 706 is conveyed by a grip roller 702 and a pinch roller 701, and ink is applied to the printing range indicated by reference numeral 705 in the drawing during the conveyance. Is transcribed. Therefore, it is necessary to always hold (grip) the printing paper 706 by the grip roller 702 and the pinch roller 701 during printing, and the distance X from the heat generating portion of the thermal head 703 to the grip position of the grip roller 702 can be printed. It becomes a margin. Therefore, in order to realize borderless printing, a cut sheet larger than the print size is prepared, a perforation is provided in advance at a position where the margin can be cut, and the margin is formed along the perforation after printing. Must be cut by the user.

  On the other hand, as shown in FIG. 7B, when the photographic paper is roll paper 707, the photographic paper is continuous paper, and a cutter 708 for cutting the photographic paper is provided in the printer. For this reason, the roll paper 707 is transported from the position shown in FIG. 7B to the position shown in FIG. 7C and then cut (by cutting only the print area 705), so that there is no marginless printing. Can be provided to the user.

  Next, the operation of the roll paper printer will be described with reference to FIG. Here, when the photographic paper stored in the cartridge is roll paper, the roll paper operates as follows in the printer 810 during printing.

  In FIG. 8, the roll paper is indicated by reference numeral 807. The roll paper 807 is a strip-shaped photographic paper wound around a roller. The leading edge 807 a of the roll paper 807 is pulled out of the cartridge 809 and is conveyed between the thermal head 803 and the platen roller 804 by the conveying rollers 801 and 802. The ink ribbon 811 is conveyed between the thermal head 803 and the roll paper 807 in a state of being superimposed on the roll paper 807, and heat is applied to the ink ribbon 811 from the thermal head 803, whereby the ink of the ink ribbon 811 is transferred to the roll paper. 807 is transferred. By repeatedly returning the roll paper 807 to the printing start position and printing, the inks of the respective colors are superimposed. The roll paper 807 for which printing has been completed is cut by the cutter 808 at the boundary between the printing area and the margin, and then discharged by the paper discharge rollers 805 and 806. This completes printing. The drawn roll paper 807 is rewound after completion of printing, stored in the cartridge 809, and returned to the state before starting printing.

  Here, when the roll paper 807 is rewound after printing is completed, if the leading edge 807a is completely rewound into the cartridge 809, the roll paper 807 cannot be pulled out from the cartridge 809 again. Therefore, when the drawn roll paper 807 is rewound after completion of printing, it is necessary to control to stop the rewinding operation with the leading edge 807a of the roll paper 807 remaining outside the cartridge 809. .

  There is also a method of keeping the roll paper pulled out, but in this case, the roll paper is exposed to the outside of the cartridge, and there is a risk that the roll paper will be dirty when not in use or damaged when the cartridge is attached or detached. .

  Alternatively, the roll paper that has been rewound to the inside of the cartridge by the roller provided inside the cartridge can be sent out to the outside of the cartridge again, but in this case, the configuration of the cartridge becomes complicated. Further, when the cartridge is removed from the printer after the printing is completed and the coupling between the roller of the cartridge and the rotation mechanism of the printer is released, the roller of the cartridge becomes rotatable. Then, it is also conceivable that the roller that has become rotatable rotates inadvertently, the roll paper is further rewound, and the tip cannot be pulled out from the cartridge.

  For this reason, even when the cartridge for storing the roll paper is removed from the printer and then remounted, the stored roll paper is reliably pulled out of the cartridge so that printing can be performed smoothly. It is desirable that Such a configuration will be described.

1. FIG. 9 is a perspective view showing the external configuration of the printer 100 and the cartridge 110 used in the printer 100. FIG. The printer 100 includes a housing 101 whose side surface is opened and closed and in which the cartridge 110 can be attached and detached in the direction of an arrow 120, and a display unit 102 and an operation unit 103 are disposed on the housing 101.

  The cartridge 110 contains an ink ribbon to which ink is applied and roll paper as photographic paper. Further, in a state before the cartridge 110 is mounted on the printer 100, the roll paper is completely covered by the housing 111, and the user does not directly touch the roll paper. At the time of printing, the roll paper is pulled out from the cartridge 110, and printing is performed by transferring the ink applied to the ink ribbon onto the roll paper by the thermal head of the printer 100.

  Reference numeral 112 in FIG. 9 denotes a rotation shaft of a roller around which roll paper is wound. When the cartridge 110 is mounted on the printer 100, it is coupled with a rotation mechanism of a paper feed motor included in the printer 100 and is rotated by the printer 100. Be controlled.

  Reference numerals 113 and 114 in FIG. 9 are rotation axes of an ink ribbon supply roller and a take-up roller, respectively. When the cartridge 110 is mounted on the printer 100, the take-up roller rotation shaft 114 is coupled to the rotation mechanism of the ink ribbon winding motor of the printer 100, and the rotation is controlled by the printer 100.

2. Next, the configuration of the cartridge 110 will be described in detail. FIG. 10 is a perspective view showing the appearance of the cartridge 110. The roll paper stored in the cartridge 110 is covered with the housing 111 when the cartridge 110 is detached from the printer 100, so that the user cannot directly touch it from the outside. With such a configuration, it is possible to prevent the roll paper from becoming dirty or foreign matter or the like from entering the cartridge 110.

  FIG. 11 is an exploded view of the cartridge 110. The structure of the cartridge 110 will be described with reference to FIG. In FIG. 11, reference numeral 401 denotes an upper housing, and the upper housing 401 covers the upper part of the ink ribbon unit 402. The ink ribbon unit 402 includes a supply roller 402-2 around which an unused ink ribbon 402-1 is wound, and a take-up roller 402-3 around which a used ink ribbon 402-1 is wound. The supply roller 402-2 and the winding roller 402-3 are rotatably supported by the housing 111.

  Further, reference numeral 403 in FIG. 11 indicates a guide roller. The guide roller 403 defines a transport path for the ink ribbon 402-1 when the used ink ribbon 402-1 is wound around the winding roller 402-3. The guide roller 403 is also rotatably supported by the housing 111.

  Further, reference numeral 404 in FIG. 11 indicates a roll paper unit. The roll paper unit 404 includes a roller 404-1, a roll paper 404-2 wound around the roller 404-1, and a flange 404-3. The roller 404-1 is rotatably supported by the side housing 405 and the housing 111. Details of the roll paper unit 404 will be described later with reference to FIG.

  The side housing 405 covers the side surface of the roll paper unit 404 and rotatably supports the roller 404-1. In addition, a separation member 406 for picking up the leading end of the roll paper 404-2 wound around the roller 404-1.

  Next, details of the roll paper unit 404 will be described with reference to FIG. FIG. 12 is a perspective view showing an appearance of the roll paper unit 404. Roll paper holding flanges 404-3 made of an elastic material are provided at both ends of the roller 404-1. The flange 404-3 prevents the roll paper 404-2 from shifting in the width direction. Further, the roll paper holding flange 404-3 has a brim portion 503. The brim portion 503 prevents the roll paper 404-2 from spreading outward in the radial direction of the flange 404-3 due to the rigidity of the roll paper 404-2. The brim portion 503 is formed with a notch portion 501 for gripping the leading end of the roll paper 404-2 on the outer peripheral wall thereof.

  The roll paper holding flange 404-3 has elasticity, and is elastically deformed when the roll paper 404-2 is fed out. FIG. 13 schematically shows how the roll paper 404-2 goes out of the flange 404-3 while elastically deforming the roll paper holding flange 404-3. FIG. 13 corresponds to a cross-section SS of FIG.

  When the roll paper 404-2 is fed out, the roll paper holding flange 404-3 is pushed and spread. Specifically, the roll paper 404-2 (FIG. 13 (a)) located inside the brim portion 503 of the roll paper holding flange 404-3 is shown in FIG. 13 (b). Then, it is elastically deformed to the position shown in FIG. At this time, the distance between the pair of roll paper holding flanges 404-3 provided at both ends of the roll paper 404-2 is close to the width of the roll paper 404-2, and the roll paper 404-2 gets over the brim portion 503. It goes out of the roll paper holding flange 404-3.

  As described above, the portion where both ends of the roll paper 404-2 are held by the roll paper holding flange 404-3 moves. Therefore, the roll paper 404-2 is fed out while the roll paper unit 404 is rotating. On the other hand, when the rotation of the roll paper unit 404 is stopped, the roll paper 404-2 is held by the roll paper holding flange 404-3 and the holding state is maintained.

3. Roll paper feeding operation from cartridge The roll paper unit 404 rotates in the same direction by rotating the roller 404-1 in the direction in which the roll paper 404-2 is fed out. When the roll paper unit 404 rotates, the leading end of the roll paper 404-2 held on the outer peripheral wall of the roll paper holding flange 404-3 is guided by the separation member 406 and guided to the roll paper outlet of the cartridge 110. FIG. 14 schematically shows the relationship between the separating member 406 and the roll paper unit 404 at this time.

  As shown in FIG. 14A, the leading end portion of the roll paper 404-2 is held on the outer peripheral wall of the roll paper holding flange 404-3. When the roller 404-1 (roll paper unit 404) rotates from this state, as shown in FIG. 14B, the leading edge of the roll paper 404-2 is guided by the separating member 406 and advances in the feeding direction. When the roller 404-1 further rotates, as described above, the roll paper holding flanges 404-3 (FIG. 13) provided on both sides of the roll paper 404-2 are elastically deformed. As a result, the roll paper 404-2 is fed out, and as shown in FIG. 14C, the leading end of the roll paper 404-2 further advances on the separating member 406 in the feeding direction.

  Next, the notch 501 will be described in detail. The notch 501 has a shape as shown in FIG. FIG. 15B shows a state in which the roll paper 404-2 has come out from the cutout portion 501, and FIG. 15C shows a state in which the roll paper 404-2 has come out from other than the cutout portion 501. Is shown.

  By rotating the roll paper unit 404 from the state shown in FIG. 15B in the roll paper feeding direction (arrow A direction in the figure), the roll paper 404-2 is picked up by the separation member 406 as described above. Then, as shown in FIG. 15C, the roll paper holding flange 404-3 is elastically deformed and spreads in the width direction, and the flange portions 503 of the roll paper holding flange 404-3 are connected to both ends of the roll paper 404-2. It will be in the holding state. When the roll paper unit 404 is further rotated, the roll paper 404-2 is further fed out, and the portion where both ends of the roll paper 404-2 are held by the roll paper holding flange 404-3 moves.

4). Roll Paper Winding Operation from Cartridge When the roll paper unit 404 is rotated in the roll paper winding direction (in the direction of arrow B in the figure) from the state shown in FIG. A force is applied in the direction of winding around 1. Then, the roll paper 404-2 that has been outside the roll paper unit 404 is gradually drawn into the roll paper unit 404 through the portion held by the roll paper holding flange 404-3. When the roll paper unit 404 is further rotated in the roll paper winding direction, the roll paper holding flange 404-3 is also rotated in the same phase. Then, the contact position between the end of the roll paper 404-2 in the width direction (arrow C direction in the figure) and the roll paper holding flange 404-3 moves from the flange portion 503 to the notch portion 501. Then, the roll paper holding flange 404-3 that should be bent due to elastic deformation should return to the original state shown in 15 (b).

  That is, the end of the roll paper 404-2 that has been rewound always passes through the notch 501 and exits to the outside of the roll paper unit 404 (on the outer peripheral wall of the brim part 503), and on the outer peripheral wall of the brim part 503. Held in. Therefore, when the roll paper 404-2 is pulled out again, the roll paper 404-2 can be surely peeled off from the roll paper unit 404 by the separating member 406 and sent out from the cartridge 110.

  From the above description, it should be understood that the roll paper holding flange plays an important role in the roll paper unit. Specifically, the roll paper holding flange is configured such that when the roll paper is stored, the leading end of the roll paper is held on the outer peripheral wall of the collar portion, and when the roll paper is fed out, the roll paper is surely secured. It must be elastically deformed so as to get over the outer wall.

  Further, the roll paper end face must be held with an appropriate force so as not to affect the printing. Considering the strength and rigidity of the end face of the roll paper, the roll paper holding flange needs to be elastically deformed with a load equal to or less than the rigidity.

  Thus, the roll paper holding flange needs to satisfy various requirements. However, when punching a sheet material to form a roll paper holding flange that satisfies the above requirements, the roll paper holding flange has the following problems. The problem will be described with reference to FIG.

  16 (a) is a perspective view of the roll paper holding flange, FIG. 16 (b) is a side view, and FIG. 16 (c) is an enlarged cross-sectional view in the vicinity of the flange 503 shown in FIG. 16 (b). . The cross-sectional shape of the flange 503 of the roll paper holding flange 404-3 is L-shaped as shown in FIG. Accordingly, the brim portion 503 has a relatively low strength against the force from the arrow X direction in the drawing, and the notch portion 501 is formed as shown in FIG. 16A by punching from the same direction. Is difficult. Further, when the shape of the notch portion 501 is changed and the notch portion 501 is formed by punching from the arrow Y direction in the drawing, the notch portion 501 is punched in a direction perpendicular to the sheet thickness of the sheet material. Therefore, it is difficult to punch because the sheet material is deformed and buckled. Furthermore, the sheet end surface of the punched part is likely to generate burrs, and when the roll paper comes into contact with that part, the surface of the roll paper is damaged or the end surface of the roll paper is caught and the roll paper holding flange is torn. There was a problem.

  An object of the present invention is to solve at least one of the above problems.

  The roll paper holding flange of the present invention is a roll paper holding flange that is provided at an end of a roller shaft around which roll paper is wound and holds the roll paper. The roll paper holding flange of the present invention is provided at the bottom portion facing the width direction end face of the roll paper, the flange portion raised from the bottom portion toward the inner side in the width direction of the roll paper, and the flange portion. And at least one notch. The brim portion connects an inner peripheral wall that holds a portion of the roll paper located inside the brim portion, an outer peripheral wall that holds a portion located outside the brim portion, and upper ends of the inner and outer peripheral walls. , And a top portion having a predetermined radius of curvature.

  According to the present invention, a roll paper holding flange and a roll paper cartridge provided with the flange that do not damage the roll paper or break the roll paper by being caught are realized.

  An example of an embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1A is a perspective view showing a state in which a roll paper holding flange 2 to which a roller shaft 1 around which roll paper is wound is attached is fitted in a roll paper storage portion 5 of the roll paper cartridge. As shown in FIG. 1A, a roll paper holding flange 2 is provided at each end of the roller shaft 1, and a fixing member for holding the roll paper holding flange 2 outside the roll paper holding flange 2. 3 is attached. In addition, the code | symbol 4 in a figure is a separation member for picking up the roll paper hold | maintained on the outer periphery of the roll paper holding flange 2 reliably, The function is mentioned later.

  FIG. 1B is a perspective view showing a state in which the roll paper R is set in the configuration described above. As shown in FIG. 1B, roll paper holding flanges 2 are disposed at both ends of the roll paper R, and the roll paper R is restricted from spreading inside the flange 201 of the roll paper holding flange 2. The leading edge of the roll paper R can be wound on the outer peripheral wall.

  2A is a perspective view of the roll paper holding flange 2, FIG. 2B is a side view, and FIG. 2C is a detailed cross-sectional view. A hole 202 provided in the center of the roll paper holding flange 2 is coaxial with the core around which the roll paper R is wound. A plurality of holes 203 provided around the hole 202 are provided as means for positioning the roller shaft 1 around which the roll paper R is wound.

  When the roller shaft 1 and the roll paper holding flange 2 are positioned and fixed, the roller shaft 1 and the roll paper holding flange 2 rotate integrally, and two rolls provided at both ends of the roller shaft 1 The phase of the paper holding flange 2 can be made uniform. The roll paper holding flange 2 according to the present embodiment is formed by processing a sheet material. The sheet material was OPS (Oriented Polystyrene) having a thickness of 0.1 to 0.25 mm. As the sheet material, not only OPS but also PP (Polypropylene) or PET (Polyethylene terephthalate) may be used. Further, HIPS (High Impact Polystyrene), PS (Polystyrene), PC (Polycarbonate), or the like may be used.

  The height of the flange portion 201 of the roll paper holding flange 2 in the present embodiment is 4 to 5 mm, but it is desirable to change it according to the plate thickness of the roll paper holding flange 2, the width and thickness of the paper, and the rigidity.

  Next, a method for forming the roll paper holding flange 2 according to the present embodiment will be described with reference to FIG. As a rough flow of molding, there are a heating process for a sheet material, a pressure forming process for pressing the sheet material against a mold, and a punching process for punching an outer shape and other shapes.

  In the heating step, the resin sheet material 301 is heated by passing between the opposing heaters 302. When the sheet material 301 is thin, the sheet material can be placed on a plate and heated.

  In the pressure forming step, the heated sheet material is placed on the mold, and the sheet material 301 is brought into close contact with the mold 303 by applying air pressure 304 from the upper surface of the sheet material 301 to be molded. Thereafter, the sheet material 301 is removed from the mold 303, cooled to room temperature, and the process proceeds to a punching process.

  In the punching process, after positioning the sheet material 301 at a predetermined position, the positioning hole 203 and the outer portion 204 are punched and formed by the punch 305.

  However, the forming method of the roll paper holding flange 2 is not limited to pressure forming, and a suitable forming method is selected according to the material and shape of the sheet material. For example, the roll paper holding flange 2 can be formed by vacuum forming, vacuum pressure forming, or the like.

  Reference is again made to FIG. The figure shows a cross section of the flange portion 201 of the roll paper holding flange 2. The brim portion 201 is raised from the bottom portion 210 facing the end surface in the width direction of the roll paper R toward the inner side in the width direction of the roll paper R. The brim portion 201 includes an inner peripheral wall 208b that holds a portion of the roll paper R that is located inside the brim portion 201, and an outer peripheral wall that is held by a portion of the roll paper R that is located outside the brim portion 201. 208a and a top portion 207 connecting the upper ends of the inner and outer peripheral walls. The top portion 207 has a predetermined radius of curvature, and the brim portion 201 is formed in a U-shaped cross section as a whole by the inner peripheral wall 208b, the outer peripheral wall 208a, and the top portion 207. More specifically, one of the corners of the top portion 207 that is continuous with the outer peripheral wall 208a and the other corner of the top portion 207 that is continuous with the inner peripheral wall 208b form a gently curved surface having a predetermined radius of curvature. Thus, the notch part 206 which has the smooth edge 205 as shown to Fig.2 (a) can be obtained by making the cross-sectional shape of the collar part 201 into U shape. As a result, since the notched portion 206 has no punched surface of the sheet material, no burrs or the like are generated in the notched portion 206, and the roll paper holding flange 2 is formed by scratching the sheet surface or catching the sheet end surface on the stamped end surface. It can prevent damage and improve paper protection and component durability.

  The two corners of the top portion 207 have a radius of curvature of 0.5 mm or more. Further, the outer peripheral wall 208 a and the inner peripheral wall 208 b of the brim part 201 are inclined at a predetermined angle θ with respect to the bottom part 210 of the brim part 201. Specifically, it is inclined at an angle of more than 0 ° and not more than 5 ° (0 ° <θ ≦ 5 °) with respect to a perpendicular passing through the end of the top portion 207 and perpendicular to the plane including the bottom portion 210. In other words, the angle θ formed between the outer peripheral wall 208a or the inner peripheral wall 208b and the normal line of the bottom portion 210 is greater than 0 ° and equal to or less than 5 °. That is, the outer peripheral wall 208 a and the inner peripheral wall 208 b are inclined so as to approach each other as the distance from the bottom portion 210 increases. This improves the durability of the mold at the time of pressure forming and the releasability of the sheet material. Moreover, the generation | occurrence | production of the wrinkle of a sheet | seat material is suppressed by giving the curvature radius more than 0.5 mm also to another bending part.

  Further, a flat surface 209 extends from the lower end of the outer peripheral wall 208 a of the brim portion 201 in parallel with the bottom portion 210. The flat surface 209 contacts the side surface of the roll paper R held on the outer peripheral wall 208a of the flange 201. The positional relationship between the width of the roll paper R and the flat surface 209 will be described later.

  Next, how the leading edge of the roll paper R advances during paper conveyance and the deformation of the roll paper holding flange 2 will be described with reference to FIGS.

  FIG. 4A is a view of the state in which the roll paper R is set (the state shown in FIG. 1B) viewed from the side surface side. In FIG. 4A, the roll paper holding flange 2 on one side is not shown in order to make the roll paper R easy to see. The roll paper R protrudes from the cutout portion 206 of the roll paper holding flange 2 to the outer periphery of the roll paper holding flange 2. FIG. 4B is a cross-sectional view of FIG. 4A, where the roll paper R is prevented from spreading by the brim portions 201 of the roll paper holding flanges 2 on both sides, and the leading edge of the roll paper R is The state currently hold | maintained on the outer peripheral wall 208a is shown. As shown in FIG. 4B, the flat surface 209 of the roll paper holding flange 2 described above is in a position that regulates both sides of the roll paper R held on the outer peripheral wall 208a of the flange portion 201. It can be seen that the paper R is prevented from being greatly inclined and fed.

  Next, how the leading edge of the roll paper R advances when the roller shaft 1 is rotated will be described with reference to FIG. 5A, the roller shaft 1 is rotated from the state shown in FIG. 4A, and the leading edge of the roll paper R held on the outer peripheral wall 208a of the roll paper holding flange 2 contacts the separation member 4. FIG. Shows the state. When the roller shaft 1 is further rotated, as shown in FIG. 5B, the leading edge of the roll paper R continues to advance on the slope of the separating member 4, but comes out of the notch 206 of the roll paper holding flange 2. The side surface of the roll paper R starts to come into contact with the brim portion 201. Then, the roll paper holding flange 2 gradually begins to spread outward in the width direction of the roll paper R from the roll paper R guided by the inclined edge 205 of the notch 206. At this time, since the cross-sectional shape of the top portion 207 of the flange portion 201 is U-shaped (see FIG. 2C), the edge 205 of the notch portion 206 is also smooth, and the roll paper R is not caught by the end surface of the roll paper R. The holding flange 2 is gradually expanded. When the roller shaft 1 further rotates and passes the notch portion 206 as shown in FIG. 5C, the roll holding flange 2 is elastically deformed in the vicinity of the paper exit, and the roll paper R is fed while being pinched and held with a weak force. . Also at this time, since the shape of the flange portion 201 of the roll paper holding flange 2 is U-shaped, the roll paper R is caught and the end face is prevented from being damaged. In the state shown in FIG. 5C, the roll paper holding flange 2 is most greatly deformed. Specifically, as shown in FIG. 6, the elastic deformation is performed until the distance between the opposing flange portions 201 on both sides becomes substantially the same as the width of the roll paper R. In order to prevent such breakage and breakage while allowing such a large deformation, the thickness of the roll paper holding flange 2 is suitably 0.1 to 0.3 mm. Furthermore, when considering cost and productivity, the roll paper holding flange 2 is desirably made of a resin material. At that time, it is more efficient and inexpensive to hold a roll paper with excellent surface properties by vacuum forming or pressure forming by pressing a thin sheet-shaped resin material prepared in advance against the mold rather than injection molding the resin material. The flange 2 can be made.

  As for the processing method, it is desirable to hold the sheet material at a temperature that can be deformed according to the material and thickness, and then place the sheet material on a mold and perform vacuum forming or pressure forming. Vacuum forming is a method in which the air between the sheet material and the mold is extracted and the sheet material is brought into close contact with the mold, and pressure forming is performed by increasing the air pressure on the upper surface of the sheet material to make the sheet material in close contact with the mold. Sometimes used in combination with pressure forming.

It is a perspective view which shows an example of a roll paper holding unit. It is a figure which shows the roll paper holding flange shown in FIG. 1, Comprising: (a) is a perspective view, (b) is sectional drawing, (c) is a partially expanded sectional view. It is explanatory drawing which shows the manufacturing process of the roll paper holding | maintenance flange shown in FIG. (A) is a side view which shows the holding state of the roll paper in the roll paper holding unit shown in FIG. 1, (b) is sectional drawing. It is a side view which shows the state from which roll paper is drawn | fed out from the roll paper holding unit shown in FIG. It is explanatory drawing which shows the relationship between the space | interval of a roll paper holding flange and roll paper width when roll paper is drawn | fed out. FIG. 6 is a schematic diagram illustrating a paper position when printing cut paper and roll paper. FIG. 2 is a schematic diagram illustrating a basic configuration of a roll paper printer. FIG. 2 is a perspective view illustrating an external configuration of a printer and a cartridge used in the printer. It is a perspective view which shows the external appearance of a cartridge. FIG. 11 is an exploded view of the cartridge shown in FIG. 10. It is a schematic diagram which shows the detail of the roll paper unit shown in FIG. It is a schematic diagram which shows a mode that the roll paper holding flange shown in FIG. 12 is elastically deformed. It is a schematic diagram for demonstrating the role of the separation member shown in FIG. It is a fragmentary perspective view of the roll paper unit shown in FIG. (A) is a perspective view of the roll paper holding flange shown in FIG. 12, (b) is a sectional view, and (c) is a partially enlarged sectional view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Roller shaft 2 Roll paper holding flange 201 Collar part 206 Notch part 207 Top part 208a Outer peripheral wall 208b Inner peripheral wall 209 Flat surface 210 Bottom part R Roll paper

Claims (7)

A roll paper holding flange provided at an end of a roller shaft around which roll paper is wound to hold the roll paper,
A bottom portion facing the widthwise end surface of the roll paper;
A brim portion raised from the bottom toward the inner side in the width direction of the roll paper,
And at least one notch provided in the collar portion,
The brim portion includes an inner peripheral wall that holds a portion of the roll paper located inside the brim portion, an outer peripheral wall that holds a portion of the roll paper located outside the brim portion, and these A roll paper holding flange characterized in that it is formed in a U-shaped section by a top portion having a predetermined radius of curvature that connects the inner peripheral wall and the upper ends of the outer peripheral wall.   2. The roll paper holding flange according to claim 1, wherein a flat surface parallel to the bottom portion extends outside the outer peripheral wall of the brim portion.   The inner peripheral wall and the outer peripheral wall of the brim portion are inclined so as to approach each other as they are separated from the bottom portion, and an angle formed by the inner peripheral wall or the outer peripheral wall and the normal line of the bottom portion is greater than 0 °. The roll paper holding flange according to claim 1 or 2, wherein the roll paper holding flange is 5 ° or less.   The top portion has two corners having a radius of curvature of 0.5 mm or more, one corner is continuous with the upper end of the outer peripheral wall, and the other corner is continuous with the upper end of the inner peripheral wall. The roll paper holding flange according to any one of claims 1 to 3.   The roll paper holding flange according to any one of claims 1 to 4, wherein the roll paper holding flange is formed by pressing a sheet material against a mold.   A roll paper cartridge in which roll paper held by the roll paper holding flange according to any one of claims 1 to 5 is stored.   The roll paper cartridge according to claim 6, wherein the roll paper is sent out by rotating the roller shaft.

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