JP5557864B2 - Paper storage device and printer - Google Patents

Description

  Embodiments described herein relate generally to a sheet storage device and a printer.

  2. Description of the Related Art Conventionally, a printer that pulls out a sheet from a roll portion of a sheet stored in a sheet storage device and performs printing on the extracted sheet is known.

  In such a printer, there is a possibility that a paper jam may occur when the paper sags.

The paper storage device of the embodiment includes a roller, a base portion, a drive portion, and a lid portion . The roller abuts on the outer peripheral portion of the roll portion of the paper wound in a roll shape, and rotates with the rotation of the roll portion. The base portion is inclined with respect to a horizontal direction at a position below the roller, includes an inclined portion that contacts the outer peripheral portion from below and makes the outer peripheral portion contact the roller, and extends downward from the roller. A slack portion of the paper to be fed can be stored. The drive unit rotates the roller in a rotation direction along with the roller when the sheet is pulled out from the roll unit. The lid portion is movable between a closed position that covers the base portion and an open position that opens the base portion. The drive unit is provided on the base unit, and is fixed to a support shaft to which the roller is fixed. The driving unit is provided on the base unit and is engaged with the first gear and the first gear. A second gear movable between a separated position separated from the first gear, an abutting portion provided on the second gear, and provided on the base portion, from the separated position toward the meshing position. An urging member for urging the second gear in the direction; and provided on the lid portion, and pressing the abutting portion against the urging force of the urging member as the lid portion is closed. A pressing member that moves one gear from the meshing position to the separation position, and rotates the roller in the rotation direction in conjunction with the closing movement of the lid toward the closing position.

FIG. 1 is a perspective view of the printer according to the first embodiment, showing a state in which a lid is closed. FIG. 2 is a perspective view of the printer according to the first embodiment, showing a state in which a lid is opened. FIG. 3 is a diagram illustrating the printer according to the first embodiment, and is a perspective view illustrating a state in which a lid portion is opened. FIG. 4 is a perspective view illustrating the paper storage unit according to the first embodiment. FIG. 5 is a vertical side view showing the paper storage unit according to the first embodiment. FIG. 6 is a perspective view showing the roller according to the first embodiment. FIG. 7 is a side view showing the roller according to the first embodiment. FIG. 8 is a rear view showing the roller and the drive unit according to the first embodiment. FIG. 9A is a side view of the drive unit according to the first embodiment. FIG. 9-2 is a side view of the drive unit according to the first embodiment. FIG. 10A is a longitudinal side view illustrating a part of the paper storage device according to the first embodiment, and is a diagram illustrating a state in which the paper is slack. FIG. 10-2 is a longitudinal side view illustrating a part of the paper storage device according to the first embodiment, and shows a state in which the slack of the paper is stored in the space. FIG. 11A is a side view of the drive unit according to the second embodiment. FIG. 11B is a side view of the drive unit according to the second embodiment. FIG. 12 is a side view showing a drive unit according to the third embodiment. FIG. 13 is a side view showing a roller according to the fourth embodiment.

  Hereinafter, embodiments will be described in detail with reference to the drawings. Note that similar components are included in the following embodiments. Therefore, in the following, common reference numerals are given to those similar components, and redundant description is omitted. In each figure, for the sake of convenience, the rear in the front-rear direction of the base 10 of the printer 1 is the X direction, the width direction of the base 10 of the printer 1 is the Y direction, and the height direction of the base 10 of the printer 1 (upward in the vertical direction). Is denoted as the Z direction. These X direction, Y direction, and Z direction are orthogonal to each other.

(First embodiment)
As shown in FIG. 1, the printer 1 has a base portion 10 and a lid portion 11. The printer 1 operates using a battery (not shown) provided in the base 10 as a power source.

  As shown in FIGS. 2 and 3, the base 10 is formed in a substantially rectangular parallelepiped shape with an upper surface opening. The base 10 is formed longer in the front-rear direction than in the left-right width direction. The base 10 supports the stored paper 100. On the other hand, as shown in FIG. 1, the lid portion 11 is formed in a substantially triangular shape in a side view. The lid portion 11 is rotatably connected to the base portion 10 by a hinge portion 12 (FIG. 2). Specifically, the lid portion 11 is arranged between the closed position (FIG. 1) that is disposed on the upper portion of the base portion 10 and covers the upper portion of the base portion 10, and the open position (FIGS. 2 and 3) that exposes the upper portion of the base portion 10. It is connected to the base 10 in a movable (movable) manner. In the closed position, the lid portion 11 covers an upper portion of a sheet storage portion 15 described later. In the open position, the lid 11 opens the paper storage unit 15. The printer 1 is provided with an open / close lock unit 50, and the open / close lock unit 50 locks the lid 11 located at the closed position so as to be releasable with respect to the base 10. The opening / closing lock part 50 has a hook 50a provided on the lid part 11 and an engaging part provided on the base part 10, and the hook 50a is engaged with and disengaged from the engaging part to lock and unlock. Do. In addition, a discharge port 10 b that discharges the paper 100 is provided between the base 10 and the lid 11 on the front surface (front surface) 10 a of the printer 1.

  Here, as shown in FIG. 2, the paper 100 used in the printer 1 of the present embodiment is formed in a long shape (band shape) and wound in a roll shape. Specifically, the paper 100 has a roll portion 100a wound in a roll shape. The sheet 100 is thermal paper as an example, and printing is performed on a drawing portion (developing portion) 100b (see FIG. 5) drawn from the roll portion 100a. As an example, the paper 100 is an externally wound paper having a printing surface facing outward. In this embodiment, the paper 100 is provided with a perforation (cut portion) 100c. A plurality of perforations 100c are provided at intervals along the longitudinal direction of the sheet 100 (only one is shown in FIG. 2). The paper 100 can be cut at the perforation 100c. As an example, the paper 100 is issued as a ticket on which predetermined items are printed.

  As shown in FIG. 3, the base 10 includes a first box 14 having a substantially box shape with an upper opening, and the first box 14 includes a sheet storage unit 15, a platen roller 16, and a lower sheet guide. 17 etc. are provided. On the other hand, the lid 11 has a second housing 18, and a display 19 with a touch panel (see FIG. 1), a print head 20, an upper paper guide 21, a damper 22, and the like are provided on the second housing 18. It has been. In a state where the lid 11 is positioned at the closed position, the print head 20 and the platen roller 16 face each other. In a state where the lid 11 is positioned at the open position, the space between the print head 20 and the platen roller 16 is opened. The lower paper guide 17 and the upper paper guide 21 guide the paper, and the space between the lower paper guide 17 and the upper paper guide 21 is a paper conveyance path from the paper storage unit 15 to the paper discharge port 10b. It has become a part.

  The lid portion 11 is opened to open the upper portion of the paper storage portion 15. The rear end portion of the lid portion 11 has an upwardly convex curved shape (arc shape). The rear end portion of the lid portion 11 covers the paper storage portion 15 from above with the lid portion 11 being closed.

  The paper storage unit 15 is provided at the rear end of the first housing 14. The paper storage unit 15 may be detachable from the printer 1 or may be provided integrally with the first housing 14. The paper storage unit 15 is a paper throw-in type, and supports the outer peripheral part 100 d of the roll unit 100 a of the stored paper 100. The paper storage unit 15 supports the paper 100 so as to be rotatable, whereby the paper 100 can be pulled out by the platen roller 16. The paper storage unit 15 constitutes a paper storage device 51 together with the lid 11 and the first housing 14.

  The platen roller 16 is connected to a motor that is a drive source via a power transmission mechanism including gears and the like. The platen roller 16 is driven to rotate by a motor in a state where the paper 100 is pressed by the print head 20, thereby pulling out and transporting the paper 100 stored in the paper storage unit 15. The motor is a stepping motor, for example, and operates according to the number of applied driving pulses. The platen roller 16 corresponds to a transport unit that pulls out and transports the paper 100 stored in the paper storage unit 15.

  The print head 20 is, for example, a thermal head. The print head 20 is disposed to face the platen roller 16. The print head 20 is connected to the inner surface of the lid portion 11 so as to be able to contact and separate from the platen roller 16. The print head 20 is biased toward the platen roller 16 by a coil spring (not shown) that is a biasing member. The print head 20 biased by the coil spring presses the paper 100 interposed between the print head 20 and the platen roller 16 against the platen roller 16. Thereby, the conveying force of the platen roller 16 is reliably transmitted to the paper 100. The print head 20 has a plurality of heating elements arranged in a row, and the heating elements are heated by selectively energizing the plurality of heating elements. Due to this heat generation, the print head 20 prints various information on the paper 100 supported by the platen roller 16 and superimposed on the heat generating element. The print head 20 performs printing on the paper 100 drawn from the paper storage unit 15. The print head 20 corresponds to a printing unit.

  When the paper 100 is set in the printer 1 having the above-described configuration, the paper 100 is dropped into the paper storage unit 15 with the lid 11 opened, and the paper 100 is pulled out until it reaches the paper discharge port 10b. It is done by closing. As a result, the drawing portion 100 b of the paper 100 is sandwiched between the platen roller 16 and the print head 20.

  Next, the paper storage unit 15 will be described in detail.

  As shown in FIGS. 4 and 5, the paper storage unit 15 includes a main body 31 and a roller 32. The main body 31 has a container shape with an upper surface opening. The main body 31 receives the roll portion 100a of the paper 100 from above. The paper storage unit 15 stores the roll 100a of the paper 100 dropped from above in the internal space 31b, and rotatably supports the stored roll 100a with the main body 31 and the roller 32. When the paper 100 is pulled out and the roll unit 100 a is rotated counterclockwise, the drawer unit 100 b pulled out from the roll unit 100 a is pulled out forward between the roller 32 and the upper paper guide 21. The main body 31 constitutes the base portion 51 a of the paper storage device 51 together with the first housing 14.

  The main body 31 includes a bottom wall 31c, a front wall 31d, a rear wall 31e, a pair of side walls 31f, and a conveyance guide portion 31g. The front wall 31d extends upward from the front end portion of the bottom wall 31c. The rear wall 31e extends upward from the rear end portion of the bottom wall 31c. The pair of side walls 31f extends upward from the pair of side end portions of the bottom wall 31c. The conveyance guide portion 31g extends forward from the upper end portion of the front wall 31d. The internal space 31b is surrounded by a bottom wall 31c, a front wall 31d, a pair of side walls 31f, and a rear wall 31e.

  The front wall 31d is a downstream side wall portion of the main body 31 in the paper drawing direction from the roll portion 100a (the direction of the arrow A in the figure), and extends substantially along the vertical direction of the printer 1. A pair of left and right support portions 31h (only one support portion 31h is shown in the drawing) is provided across the upper end portion of the front wall 31d and the rear end portion of the conveyance guide portion 31g. The pair of support portions 31h are arranged with a space left and right. The pair of support portions 31h rotatably support the roller 32 via the support shaft 33, and position the roller 32 above the front wall 31d.

  The bottom wall 31c has a first inclined portion (inclined portion, upper surface, inclined surface) 31k. The first inclined portion 31k constitutes the bottom surface (inner bottom surface) of the main body 31. The first inclined portion 31k is positioned below the roller 32 and is inclined with respect to the horizontal direction. The first inclined part 31k abuts on the outer peripheral part 100d of the roll part 100a from below. The first inclined portion 31k brings the outer peripheral portion 100d of the roll portion 100a into contact with the roller 32. In other words, the first inclined portion 31k is inclined so as to descend in the direction from the rear wall 31e toward the front wall 31d, that is, in the direction of pulling out the paper 100 from the roll portion 100a. Therefore, a force that rolls in the direction of going down the bottom wall 31 c, that is, the direction toward the roller 32 is applied to the paper 100. The first inclined portion 31k is continuous with the lower end of the front wall 31d so as to bend backward from the lower end of the front wall 31d.

  The rear wall 31e has a first wall portion 31i that extends rearward and obliquely upward from the rear end portion of the rear wall 31e, and a second wall portion 31j that extends substantially upward from the first wall portion 31i. ing. Therefore, the space between the rear wall 31e and the front wall 31d becomes wider as it goes upward. This makes it easier to throw the paper 100 into the internal space 31b.

  In the main body 31, a space 31x is formed in a portion surrounded by the front wall 31d, the bottom wall 31c, and the roll portion 100a in a state where the roll portion 100a of the paper 100 is stored in the main body 31 (FIG. 5). The space 31x can accommodate a slack portion 100f (see FIGS. 5 and 10-2) generated in the paper 100. As described above, the main body 31 can store the slack portion 100 f of the paper 100 between the roller 32 and the main body 31.

  The conveyance guide portion 31g includes a plate-like first portion 31l extending obliquely upward and forward from the upper end portion of the front wall 31d, and a plate-like first portion extending forward substantially horizontally from the first portion 31l. 2 portions 31m.

  A plurality of convex portions 31n are provided on the upper surface of the second portion 31m. The convex part 31n is an example of a guide part. A plurality of convex portions 31n are provided along the axis (rotation center line) 32b of the roller 32. The axis 32b extends along a direction orthogonal to the paper surface of FIG. The convex part 31n has the 2nd inclination part 31p and the opposing part 31q provided continuously with the 2nd inclination part 31p. The facing portion 31q faces the roller 32. The connection part 31r between the second inclined part 31p and the facing part 31q is convexly curved upward. The connection part 31r constitutes the upper end part of the convex part 31n.

  The second inclined portion 31p is provided on the downstream side of the roller 32 in the drawing direction of the paper 100 from the roll portion 100a (the direction of arrow A in FIG. 5, hereinafter also referred to as the paper drawing direction). The second inclined portion 31p is formed to rise upward from the downstream end 31s in the paper drawing direction toward the upstream end 31t. In other words, the second inclined portion 31p is formed to be inclined upward toward the roller 32. The upstream end 31 t is located above the shaft center 32 b of the roller 32 and located below the upper end 32 c of the roller 32. The second inclined portion 31p can contact the drawn paper 100. The second inclined portion 31p guides the paper 100 conveyed back toward the roll portion 100a on the downstream side of the roller 32 in the paper drawing direction in a direction toward the upper side of the roller 32.

  The main body 31 having such a configuration is formed by resin molding as an example, whereby the first inclined portion 31k and the second inclined portion 31p are integrally formed.

  The roller 32 can contact the outer peripheral portion 100d of the roll portion 100a in a state where the roll portion 100a of the paper 100 is stored in the paper storage portion 15. The roller 32 abuts on the outer peripheral portion 100d of the roll portion 100a and rotates with the rotation of the roll portion 100a. In other words, the roller 32 rotates following the roll unit 100a. When the paper 100 is pulled out, the roll unit 100a contacts the roller 32, so that the movement of the roll unit 100a in the paper drawing direction is restricted and the paper 100 is prevented from jumping up. Further, the height of the front wall 31d is made lower than that of the side wall 31f, and the roller 32 is provided on the front wall 31d, so that the front of the internal space 31b is widely opened, and the paper 100 can be easily taken in and out. ing. As shown in FIGS. 6 and 7, the roller 32 includes a columnar base portion 32d and a rubber member 32e covering the base portion 32d. The base portion 32d is made of a metal that is relatively heavy as an example. As described above, since the base portion 32d is made of a relatively heavy metal, the roller 32 can function as a flywheel. Further, since the roller 32 is provided with the rubber member 32e on the outer periphery, the frictional force acting between the roller 100 and the sheet 100 is relatively large, and the occurrence of slippage between the roller 32 and the sheet 100 is suppressed.

  As shown in FIG. 5, when the shaft center 100e of the roll part 100a is located at a position below the shaft center 32b of the roller 32, the roller 32 hits the upper part (upper half part) of the roll part 100a. Touch. On the other hand, when the axis (rotation centerline) 100e of the roll part 100a is located above the axis 32b of the roller 32 (not shown), the roller 32 has a lower part (lower half part) of the roll part 100a. Abut.

  Further, the paper storage device 51 is provided with a drive unit 52 as shown in FIGS. The drive unit 52 rotates the roller 32 in the rotational direction (the direction of arrow C in FIGS. 5 and 9-2) of the roller 32 when the paper 100 is pulled out from the roll unit 100a. Hereinafter, this rotational direction of rotation is also referred to as a normal rotation direction.

  Specifically, the drive unit 52 includes a first gear 53, a second gear 54, an urging member 55, and a pressing member 56.

  The first gear 53 is a pinion. The first gear 53 is provided on the base portion 51a. The first gear 53 is fixed to a support shaft 33 to which the roller 32 is fixed. Accordingly, the first gear 53 rotates integrally with the roller 32.

  The second gear 54 is a rack. The second gear 54 is provided on the base portion 51a. The second gear 54 is movable between a meshing position (FIG. 9A) that meshes with the first gear 53 and a spaced position (FIG. 9B) that is separated from the first gear 53. The second gear 54 is movable in the vertical direction. The second gear 54 is provided with a contact portion 54a.

  The biasing member 55 is a coil spring. The urging member 55 is provided on the base portion 51a. The urging member 55 urges the second gear 54 in the direction from the separated position to the meshing position. At this time, the second gear 54 urged by the urging member 55 at the meshing position is positioned in contact with a positioning portion (not shown). The biasing member 55 is not limited to a coil spring, and may be a leaf spring, for example.

  The pressing member 56 is formed in a rod shape. The pressing member 56 is provided in the second casing 18 of the lid 11 and protrudes from the second casing 18. The pressing member 56 can be inserted into and removed from a groove-like insertion portion 14a (FIG. 2) provided in the first housing 14 and extending in the vertical direction. The pushing member 56 pushes the contact portion 54a against the urging force of the urging member 55 in accordance with the closing operation of the lid portion 11, and moves the second gear 54 from the meshing position to the separated position. The pressing member 56 also functions as a guide portion that guides the side of the paper 100. Thereby, meandering of the paper 100 can be suppressed.

  In the drive unit 52 having such a configuration, when the lid 11 is closed, the pressing member 56 pushes the second gear 54 to move the second gear 54 from the meshing position to the separated position. At this time, the second gear 54 rotates the first gear 53 in the forward rotation direction, and then the second gear 54 is separated from the first gear 53. Thereby, the roller 32 can freely rotate with respect to the second gear 54 in a state in which the lid portion 11 is closed. Thus, the drive unit 52 rotates the roller 32 in the forward rotation direction in conjunction with the closing movement of the lid portion 11 toward the closed position. The drive unit 52 converts the closing motion of the lid portion 11 into rotational motion in the forward rotation direction of the roller 32. In addition, when the lid portion 11 is opened, the driving unit 52 is separated from the second gear 54 and the second gear 54 is positioned at the meshing position by the urging force of the urging member 55. The second gear 54 meshes with the first gear 53.

  In the printer 1 having the above configuration, when the paper 100 is pulled out and conveyed by the platen roller 16, the roll unit 100a rotates in the first direction (counterclockwise in FIG. 5). At this time, the lower end portion of the roll portion 100a slides on the first inclined portion 31k of the bottom wall 31c, and the roller 32 rotates with the rotation of the roll portion 100a. The roller 32 rotates in a second direction (clockwise in FIG. 5) opposite to the roll unit 100a. As described above, in this embodiment, since the roller 32 supports a part of the roll portion 100a, the pull-out resistance of the paper 100 can be made relatively small, and the paper 100 can be pulled out satisfactorily.

  Here, in a state where the diameter of the roll unit 100a is reduced and the roll unit 100a is in contact with the front wall 31d instead of the roller 32, when the paper 100 is pulled out and the roll unit 100a rotates, the roll unit 100a is moved to the front wall. There is a case where it climbs 31d and moves to an upper position. In this case, the roll part 100a climbing up the front wall 31d comes into contact with the roller 32, and the roller 32 is rotated along with the rotation of the roll part 100a. Thereby, the upward movement of the roll part 100a is restricted, and the roll part 100a falls to the bottom wall 31c immediately after contacting the roller 32 as an example.

  Next, how the slack portion 100f is housed in the space 31x when the slack portion 100f occurs in the paper 100 will be described with reference to FIGS.

  As the paper 100 is pulled out, a slack portion 100f may occur in the paper 100. As shown in FIG. 10A, the slack portion 100f is likely to occur between the upper portion of the roller 32 and the drawing portion 100b drawn from the roll portion 100a. As shown in FIG. 10-2, the slack portion 100f generated between the upper portion of the roller 32 and the draw-out portion 100b is brought into the space 31x as shown in FIG. Sent to the space 31x.

  As described above, in the printer 1 according to the present embodiment, the slack portion 100f generated in the paper 100 is moved to a position away from the drawn-out portion 100b that is pulled out by the rotation of the roller 32 as an example. As a result, the sheet is prevented from being conveyed together with the drawer portion 100b, and the occurrence of paper jam due to the slack portion 100f can be suppressed.

  Further, in the printer 1 of the present embodiment, the driving unit 52 rotates the roller 32 in the forward rotation direction in conjunction with the closing motion of the lid portion 11 toward the closing position. As a result, the slack portion 100f generated in the paper 100 due to the rotation of the roller 32 is sent into the space 31x and stored in the space 31x, as shown in FIG.

  As described above, in the present embodiment, the driving unit 52 moves in the rotational direction of the roller 32 when the paper 100 is pulled out from the roll unit 100a (the direction of the arrow C in FIGS. 5 and 9-2). The roller 32 is rotated. Therefore, the slack portion 100f generated in the paper 100 is sent to the inside of the space 31x and stored in the space 31x, so that the occurrence of paper jam can be suppressed.

  In the present embodiment, the drive unit 52 rotates the roller 32 in the forward rotation direction in conjunction with the closing motion of the lid portion 11 toward the closed position. Therefore, even when a slack portion 100f is generated in the paper 100 when the paper 100 is set, the slack portion 100f is sent into the space 31x and stored in the space 31x. That is, before the print transport operation, the slack portion 100f is sent into the space 31x and stored in the space 31x. Therefore, the occurrence of paper jam can be suppressed.

  In the present embodiment, the roller 32 functions as a flywheel. In this case, the roller 32 tries to maintain the rotation by the inertial force when the roller 32 rotates, and continues to rotate for a while by the inertial force even after the conveyance operation of the paper 100 is stopped. And the occurrence of paper jam due to the slack portion 100f can be further suppressed.

(Second Embodiment)
In the present embodiment, as shown in FIGS. 11A and 11B, a part of the drive unit 52 is different from the first embodiment. The second gear 54 of the drive unit 52 of the present embodiment is between a meshing position (FIG. 11A) that meshes with the first gear 53 and a separated position (FIG. 11B) that is separated from the first gear 53. Therefore, it can move along the horizontal direction. Further, the contact portion 54a extends substantially in the vertical direction at the end portion of the base portion 54b provided with teeth in the first gear 53 and extending in the front-rear direction. In the present embodiment, the hook 50a of the opening / closing lock unit 50 functions as a pressing member.

  In the drive unit 52 having such a configuration, when the lid portion 11 is closed, when the hook 50a engages with the engagement portion 50b, the contact portion 54a is pushed to move the second gear 54 away from the meshing position. Move to. At this time, the second gear 54 rotates the first gear 53 in the forward rotation direction, and then the second gear 54 is separated from the first gear 53. Thus, the drive unit 52 rotates the roller 32 in the forward rotation direction in conjunction with the closing movement of the lid portion 11 toward the closed position. The drive unit 52 converts the closing motion of the lid portion 11 into rotational motion in the forward rotation direction of the roller 32. In addition, when the lid portion 11 is opened, the drive unit 52 moves the hook 50a away from the second gear 54, and the second gear 54 is positioned at the meshing position by the urging force of the urging member 55. The gear 54 meshes with the first gear 53.

(Third embodiment)
As shown in FIG. 12, the present embodiment is different from the first embodiment in part of the drive unit 52 and the like. The drive unit 52 includes a motor 60, a gear 61 in which the driving force of the motor 60 is transmitted by an endless belt 67, a first gear 53 that meshes with the gear, and a control unit 62 that controls the motor 60. Yes.

  The gear 61 is supported by a support portion (not shown) so as to be rotatable around the rotation shaft 60a of the motor 60 (in the direction of arrow D in the figure). The gear 61 is rotationally driven around the rotation shaft 60 a by a drive source (not shown) such as a solenoid connected to the control unit 62.

  The motor 60 is connected to the platen roller 16 via a gear train 64 and drives the platen roller 16.

  The control unit 62 includes a CPU, a ROM, and a RAM as an example, and controls the entire printer 1. Detection sensors 65 and 66 are connected to the control unit 62. The detection sensor 65 detects that the roll unit 100a is stored in the paper storage unit 15 of the base unit 51a. The detection sensor 65 is provided in the paper storage unit 15. The detection sensor 66 is, for example, a micro switch or an optical sensor. The detection sensor 66 detects the open / closed state of the lid 11. The detection sensor 66 is provided, for example, on the base body 51a. The detection sensor 66 is, for example, a micro switch.

  In such a configuration, the drive unit 52 is a case where the detection sensor 65 detects that the lid portion 11 is open, and the detection sensor 65 detects that the roll unit 100a is stored in the base unit 51a. Then, the gear 61 is engaged with the first gear 53, and the roller 32 is driven in the forward rotation direction by the motor 60. Thereby, the slack portion 100f of the paper 100 is sent into the space 31x and stored in the space 31x. Then, when the detection sensor 66 detects that the lid portion 11 is closed, the driving unit 52 stops driving the roller 32 and causes the gear 61 to be separated from the first gear 53. Accordingly, the platen roller 16 can be driven without driving the roller 32 when the paper 100 is conveyed. A torque limiter is provided between the first gear 53 and the support shaft 33. Thereby, it is suppressed that an excessive torque acts on the support shaft 33.

(Fourth embodiment)
In the present embodiment, as shown in FIG. 13, the shape of the base portion 32d of the roller 32 is different from the above embodiments. In the base portion 32d of this embodiment, the cross-sectional shape in a plane perpendicular to the rotation axis of the roller 32 is a spoke shape. Specifically, the roller 32 is provided with a plurality of spokes 32f extending radially from the inner peripheral portion between the inner peripheral portion and the outer peripheral portion (rim). A space 32g is formed between the spokes 32f.

  Thus, by making the roller 32 into a spoke shape, it is possible to concentrate the weight on the outer peripheral portion and reduce the weight of the roller 32. Thereby, the effect as a flywheel of the roller 32 and weight reduction can be made to make compatible.

  As described above, according to each of the above embodiments, the occurrence of paper jam can be suppressed.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  For example, in the above-described embodiment, an example in which the support portion 31h is provided on the front wall 31d is shown, but the support portion 31h may be provided on the side wall 31f.

  Further, in the above-described embodiment, the paper 100 is an externally wound paper whose printing surface faces outward. However, the present invention is not limited to this, and the paper 100 is an internal winding whose printing surface faces inward. It may be. In the embodiment described above, the paper 100 provided with the perforation 100c is used. However, the present invention is not limited to this, and the paper 100 has a long shape without the perforation 100c. It may be paper. Further, the sheet 100 may be a label sheet in which a label is attached to a long mount.

  DESCRIPTION OF SYMBOLS 1 ... Printer, 11 ... Cover part, 20 ... Print head (printing part), 31k ... 1st inclination part (inclination part), 32 ... Roller, 33 ... Support shaft, 51 ... Paper storage apparatus, 51a ... Base | substrate part, 52 ... Drive unit, 53 ... first gear, 54 ... second gear, 54a ... contact portion, 55 ... biasing member, 56 ... pressing member, 65 ... detection sensor, 100 ... paper, 100a ... roll unit, 100d-outer peripheral part.

JP 2010-64300 A

Claims (3)

A roller that comes into contact with the outer periphery of the roll portion wound in a roll shape on the paper and rotates with the rotation of the roll portion;
An inclined portion that is inclined with respect to the horizontal direction at a position below the roller, contacts the outer peripheral portion from below, and makes the outer peripheral portion contact the roller; A base portion capable of accommodating a slack portion;
A drive unit that rotates the roller in a rotational direction of rotation of the roller when the paper is pulled out from the roll unit;
A lid part movable between a closed position covering the upper part of the base part and an open position opening the base part;
With
The drive unit is
A first gear provided on the base portion and fixed to a support shaft to which the roller is fixed;
A second gear that is provided on the base portion and is movable between a meshing position that meshes with the first gear and a spaced position that is spaced from the first gear;
A contact portion provided on the second gear;
A biasing member that is provided on the base portion and biases the second gear in a direction from the separation position toward the meshing position;
A pressing member that is provided on the lid part and moves the first gear from the meshing position to the separated position by pushing the abutting part against the urging force of the urging member when the lid part is closed. When,
A sheet storage device that rotates the roller in the rotation direction in conjunction with the closing movement of the lid toward the closed position.   The paper storage device according to claim 1, wherein the driving unit converts the closing motion of the lid portion into a rotational motion of the roller in the rotational direction. The paper storage device according to claim 1 or 2 ,
A printing unit for printing on the paper drawn from the paper storage device;
With printer.

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