JP2009143022A - Print medium supplying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a print medium supplying device which can be adapted to a plurality of roll sheets different in internal diameters of cylindrical bodies by only inserting an attachment to a main shaft and removing it therefrom. <P>SOLUTION: The device is equipped with the main shaft 41 in which an attachment part 415 with the circumferential face set nearly equal to the smallest cylindrical body internal diameter among the roll sheets 31 estimated to be attached is formed; and a first attachment 47a of a doughnut shape which has an inner circumferential face nearly equal to the outer circumferential face of the attachment part 415, also has an outer circumferential face larger than the outer circumferential face of the attachment part 415 and nearly equal to the cylindrical body internal diameter of one of the roll sheets 31 estimated to be attached, and is annularly set to be insertable and removable to the outer circumferential face of the attachment part 415 of the main shaft 41. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a print medium supply device that rotatably supports a roll paper around which a print medium is wound around a cylindrical body such as a paper tube and supplies the print medium to a printing apparatus, and in particular, a roll paper tube. The present invention relates to a print medium supply apparatus in which a main shaft is inserted and attached to a body.

  When the main shaft is inserted into the roll paper cylindrical body to support the inner peripheral surface, the roll paper cylindrical body is arranged on the peripheral surface of the main shaft in order to position the main shaft on the central axis of the roll paper. It is necessary to provide a peripheral surface set substantially the same as the inner diameter. On the other hand, there are various sizes of roll paper, and it is necessary to cope with roll paper having a different cylindrical body inner diameter. Therefore, a configuration is adopted in which a pair of disc-shaped holder disks are detachably attached to the main shaft and fixed with a fastener such as a screw, and an appropriate outer diameter according to the inner diameter of the cylindrical body of the roll paper is adopted. It is proposed to replace the holder disk (see, for example, Patent Document 1).

  However, in the prior art, when replacing the holder disk, it is necessary to perform a plurality of operations such as loosening the fastener and removing the attached holder disk, attaching a new holder disk, and closing the fastener. There was a problem that.

JP 2003-146493 A

  The present invention has been made in view of such problems, and the object of the present invention is to accommodate a plurality of roll papers having different inner diameters of the cylindrical body simply by inserting / removing the attachment to / from the main shaft. It is in providing a print medium supply device that can be printed.

In order to solve the above problems, the present invention has the following configurations.
The gist of the invention described in claim 1 is a print medium supply device that rotatably supports the roll paper supplied to the printing means, and has the smallest cylindrical body inner diameter among the roll papers assumed to be mounted. A main shaft having a mounting portion having an outer peripheral surface set substantially the same, an inner peripheral surface substantially the same as the outer peripheral surface of the mounting portion, and larger than the outer peripheral surface of the mounting portion and mounted. A donut-shaped first attachment having an outer peripheral surface substantially the same as an inner diameter of a cylindrical body of any of the assumed roll papers, and being detachably mounted on an outer peripheral surface of the mounting portion of the main shaft; The present invention resides in a printing medium supply apparatus comprising:
The gist of the invention of claim 2 is that the first attachment is slid in the axial direction of the main shaft, whereby the mounting portion of the main shaft and the first attachment are engaged and disengaged. 2. The print medium supply apparatus according to claim 1, wherein the means is formed on an outer peripheral surface of the mounting portion of the main shaft and an inner peripheral surface of the first attachment.
The gist of the invention described in claim 3 is any one that has an inner peripheral surface substantially the same as the outer peripheral surface of the first attachment, is larger than the outer peripheral surface of the first attachment, and is assumed to be mounted. A donut-shaped second attachment having an outer peripheral surface substantially the same as an inner diameter of the cylindrical body of the roll paper and being detachably mounted on the outer peripheral surface of the first attachment. The printing medium supply apparatus according to claim 1 or 2.
According to a fourth aspect of the present invention, there is provided locking means for engaging and disengaging the first attachment and the second attachment by sliding the second attachment in the axial direction of the main shaft. 4. The print medium supply apparatus according to claim 3, wherein the print medium supply device is formed on an outer peripheral surface of the first attachment and an inner peripheral surface of the second attachment.

  A print medium supply apparatus according to the present invention includes a main shaft having a mounting portion having a circumferential surface set substantially the same as the inner diameter of the smallest cylindrical body among the roll paper assumed to be mounted, The main shaft has an inner peripheral surface that is substantially the same as the outer peripheral surface, has an outer peripheral surface that is larger than the outer peripheral surface of the mounting portion, and substantially the same as the inner diameter of the cylindrical body of any roll paper that is assumed to be mounted. The roll paper having the smallest cylindrical body inner diameter can be mounted on the mounting portion of the main shaft by providing the donut-shaped first attachment that is removably mounted on the outer peripheral surface of the mounting portion. At the same time, roll paper having a cylindrical body inner diameter larger than the outer peripheral surface of the mounting portion is attached to the outer peripheral surface of the first attachment by attaching the first attachment to the mounting portion of the main shaft when replacing the roll paper. It is possible Therefore, an effect that the first attachment to the main shaft only insertion and removal, can be the inner diameter of the tubular body corresponding to the two different types of roll paper.

  Furthermore, the printing medium supply device of the present invention includes a locking means for engaging and disengaging the main shaft mounting portion and the first attachment by sliding the first attachment in the axial direction of the main shaft. By forming on the outer peripheral surface of the shaft mounting portion and the inner peripheral surface of the first attachment, it is not necessary to tighten with a fastener using an instrument such as a driver, and the first attachment is inserted into and removed from the main shaft. There is an effect that can be.

  Furthermore, the print medium supply apparatus of the present invention has an inner peripheral surface substantially the same as the outer peripheral surface of the first attachment, and is larger than the outer peripheral surface of the first attachment and is assumed to be mounted. By providing a donut-shaped second attachment that has an outer peripheral surface substantially the same as the inner diameter of the cylindrical body of the roll paper and is detachably mounted on the outer peripheral surface of the first attachment, The roll paper having a cylindrical inner diameter larger than the outer peripheral surface can be attached to the outer peripheral surface of the second attachment by attaching the second attachment to the first attachment when replacing the roll paper. There is an effect that it is possible to cope with a plurality of roll papers having different inner diameters of the cylindrical body simply by inserting / removing a plurality of attachments to / from the shaft. In addition, since the first attachment can be stored in a state where the second attachment is wrapped around, the storage location of the first attachment and the second attachment can be saved.

  Furthermore, the printing medium supply apparatus of the present invention includes a first locking means for engaging and disengaging the first attachment and the second attachment by sliding the second attachment in the axial direction of the main shaft. By forming on the outer peripheral surface of the attachment and the inner peripheral surface of the second attachment, it is not necessary to tighten with a fastener using an instrument such as a driver, and the second attachment is inserted into and removed from the first attachment. There is an effect that can be.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing a configuration of an embodiment of a print medium supply apparatus according to the present invention, and FIG. 2 is a state where the print medium supply apparatus according to the present invention is connected to a printer. 3 is a perspective view showing the configuration of the main shaft, the roll paper guide and the slide sleeve shown in FIG. 1, and FIG. 4 is a diagram showing the configuration of the main shaft shown in FIG. (A) is the side view seen from the plane side formed in the main shaft, (b) is the side view which rotated (a) 90 degrees, (c) is seen from the axial direction. It is a figure. 5 is a perspective view showing a configuration of an attachment attached to the main shaft shown in FIG. 1, FIG. 6 is a diagram showing a configuration of a slide sleeve shown in FIG. 3, and (a) is formed on the main shaft. It is the side view seen from the side which opposes the flat surface, (b) is the side view which rotated (90) 90 degrees, (c) is the figure seen from the axial direction. FIG. 7 is an explanatory view for explaining the operation of the slide sleeve shown in FIG.

  1 and 2, the print medium supply device of the present embodiment is connected to the front stage of the printing device 1, and is in a strip shape such as a label continuum in which labels are temporarily attached to the strip mount at intervals. Is a pre-processing device that supplies the printing medium 3 to the printing apparatus 1 from the outside, and is disposed on the back side of the main body frame 2 and is printed in a roll shape around a cylindrical body such as a paper tube. A roll paper support mechanism 4 that supports the medium 3 (hereinafter, the belt-shaped print medium 3 wound in a roll shape is referred to as a roll paper 31) while rotatably supporting the movement in the width direction, and a main body frame 2, damper means 5 for reducing the inertia load when the printing medium 3 is supplied from the roll paper support mechanism 4 to the printing apparatus 1, and extending from the front side of the main body frame 2, An alignment plate 6 for aligning with the printing apparatus 1; That.

  The printing apparatus 1 in which the printing medium supply apparatus of the present embodiment is used is provided with a paper carry-in port through which the printing medium 3 is carried in from the outside. A sheet conveying means for conveying is provided. The printing apparatus 1 may be of any printing method. For example, a thermal printing method or a thermal transfer method that performs printing while sandwiching and transporting the print medium 3 between a thermal head and a platen may be adopted. it can.

  The roll paper support mechanism 4 is inserted into the inner diameter of the cylindrical body of the roll paper 31, and is erected on the back side of the main body frame 2 with a main shaft 41 on which the roll paper 31 is mounted. A pair of support plates 42 that rotatably support both ends of the paper and a roll paper guide 43 that is mounted on the main shaft 41 and regulates the movement of the roll paper 31 in the width direction.

  3 and 4, the main shaft 41 is provided with a D-cut process, that is, a shaft main body 411 having a part of a peripheral surface formed flat in the axial direction, and protruding from both ends of the shaft main body 411. And a cylindrical shaft shaft 412 that is rotatably supported by a pair of support plates 42. As shown in FIG. 4C, the diameter L of the shaft shaft 412 is set smaller than the diameter M of the shaft main body 411, and the axial length of the shaft main body 411 is set between the pair of support plates 42. It is slightly shorter than the interval. Therefore, by spanning the main shaft 41 between the pair of support plates 42, the shaft body 411 is positioned in the axial direction so that the central portion of the main shaft 41 is positioned at the midpoint between the pair of support plates 42. It has become. The shaft body 411 and the shaft shaft 412 may be integrally molded with resin, but in this embodiment, the diameter L of the shaft shaft 412 is set smaller than the diameter M of the shaft body 411. Therefore, it is preferable that the shaft shaft 412 is a relatively heavy metal rod and the resin shaft body 411 is fixed to the peripheral surface of the shaft shaft 412 without the shaft being eccentric. .

  The central portion of the shaft body 411 has a peripheral surface inscribed in the inner diameter of the cylindrical body of the roll paper 31 to be mounted, and a mounting portion 415 to which the roll paper 31 is mounted extends from the peripheral surface of the shaft main body 411. Is provided. The diameter N of the peripheral surface of the mounting portion 415 is set to be substantially the same as the inner diameter of the cylindrical body that is larger than the diameter M of the peripheral surface of the shaft body 411 and is the smallest among the roll papers 31 that are assumed to be mounted on the main shaft 41. Has been.

  As the main shaft 41, it is assumed that a plurality of types of roll paper 31 having different cylindrical body inner diameters are attached, but the diameter N of the attachment portion 415 of the shaft body 411 is assumed to be attached to the main shaft 41. In this embodiment, as shown in FIG. 5, the first attachment 47 a that is mounted on the outer peripheral surface of the mounting portion 415 is set to be substantially the same as the inner diameter of the smallest cylindrical body 31. The second attachment 47b is prepared, and is configured to be able to change the diameter of the peripheral surface inscribed in the inner diameter of the cylindrical body of the roll paper 31 by being attached to the outer peripheral surface of the mounting portion 415.

  The first attachment 47a has an outer peripheral surface of the mounting portion 415 of the main shaft 41, that is, an inner peripheral surface substantially the same as the inner diameter of the smallest cylindrical body in the roll paper 31 that is assumed to be mounted on the main shaft 41. In addition, a donut shape having an outer peripheral surface that is substantially the same as the inner diameter of the cylindrical body of any roll paper 31 that is assumed to be attached to the main shaft 41, and whose central axes coincide with each other. The inner peripheral surface is provided with a concave portion 471 that is recessed in a direction substantially orthogonal to the central axis, and the outer peripheral surface is provided with a convex portion 472 that protrudes in a direction substantially orthogonal to the central axis. However, it can be displaced by a resin spring 473 in a direction substantially perpendicular to the central axis.

  The mounting portion 415 is provided with a convex portion 416 protruding in a direction substantially orthogonal to the axial direction of the main shaft 41 so as to be displaceable in a direction substantially orthogonal to the axial direction of the main shaft 41 by a resin spring 417. The first attachment 47a is mounted on the mounting portion 415, so that the convex portion 416 is fitted into the concave portion 471, and the first attachment 47a is fixed to the mounting portion 415. That is, the convex portion 416 provided on the outer peripheral surface of the mounting portion 415 and the concave portion 471 provided on the inner peripheral surface of the first attachment 47a slide the first attachment 47a in the axial direction of the main shaft 41. The mounting portion 415 of the main shaft 41 and the first attachment 47a function as a locking means that is engaged and disengaged.

  The second attachment 47b has an inner peripheral surface that is substantially the same as the outer peripheral surface of the first attachment 47a, and is substantially the same as the inner diameter of the largest cylindrical body in the roll paper 31 that is assumed to be attached to the main shaft 41. It has a donut shape having the same outer peripheral surface, and the central axes of the inner peripheral surface and the outer peripheral surface coincide with each other, and the inner peripheral surface is provided with a recess 474 that is recessed in a direction substantially orthogonal to the central axis. Thus, by mounting the second attachment 47b around the first attachment 47a, the convex portion 472 is fitted into the concave portion 474, and the second attachment 47b is fixed to the first attachment 47a. That is, the convex portion 472 provided on the outer peripheral surface of the first attachment 47a and the concave portion 474 provided on the inner peripheral surface of the second attachment 47b slide the second attachment 47b in the direction of the central axis. The first attachment 47a and the second attachment 47b function as locking means that are engaged and disengaged.

  In the present embodiment, the first attachment 47a and the second attachment 47b are used to correspond to the roll paper 31 having three different types of cylindrical body inner diameters. By dividing the attachment 47a into a plurality of stages, the number of roll papers 31 that can be handled can be increased. In the present embodiment, the convex portions 416 and 472 provided on the outer circumferences of the mounting portion 415 and the first attachment 47a are the concave portions 471 and 474 provided on the inner circumferences of the first attachment 47a and the second attachment 47b. However, a concave portion is provided on the outer periphery of the mounting portion 415 and the first attachment 47a, and a convex portion is provided on the inner periphery of the first attachment 47a and the second attachment 47b. good.

  Referring to FIGS. 3 and 4, positioning planes formed on a part of the peripheral surface of the shaft body 411 are formed with positioning grooves 413 formed of a plurality of grooves orthogonal to the axis at both ends, respectively. A mounting hole 414 for attaching a pinion gear 46 to be described later is formed in the central portion.

  Further, a pair of slide sleeves 45 are mounted on the shaft body 411 so as to be movable in the axial direction. Referring to FIGS. 3 and 6, the slide sleeve 45 is mounted on the peripheral surface of the shaft body 411 of the main shaft 41 so as to rotate with the main shaft 41 and move in the axial direction. In a state where the cylindrical portion 451 in which 43 is mounted and the cylindrical portion 451 is mounted on the circumferential surface of the shaft body 411, the cylindrical portion 451 is positioned facing a plane formed on a part of the circumferential surface of the shaft body 411. 3 and 6, a pair of slide sleeves 45 are respectively mounted on the shaft body 411 from both sides of the main shaft 41 so that the gears formed on the guide rack 452 face each other. Has been.

As shown in FIG. 6, the tubular portion 451 is formed with a flange portion 453 for positioning the roll paper guide 43 to be mounted. In addition, a leaf spring portion 455 is provided at a position facing the positioning groove 413 of the shaft body 411 in a state of being mounted on the shaft body 411, and a surface of the leaf spring portion 455 facing the positioning groove 413 is a plate. A convex portion 454 that engages with the positioning groove 413 is formed by the biasing force of the spring portion 455. The biasing force of the leaf spring portion 455 is set to be relatively weak. As the slide sleeve 45 moves in the axial direction, the convex portion 454 and the positioning groove 413 are easily engaged and disengaged, and the slide sleeve 45 The axial movement is performed while being positioned in stages by the positioning groove 413. Further, the leaf spring portion 455 can be resin-molded integrally with the cylindrical portion 451 as a resin spring.

  Further, the roll paper guide 43 is placed in the cylindrical portion 451 at a position facing the first opening 456 for integrating the roll paper guide 43 with the slide sleeve 45 and the positioning groove 413 of the main shaft 41. 45 and a second opening 457 for being integrated with the main shaft 41 are formed. In the present embodiment, as shown in FIG. 6, both the first opening 456 and the second opening 457 are located around the leaf spring portion 455, that is, at a position facing the positioning groove 413 of the main shaft 41. However, as long as the second opening 457 is formed at a position facing the positioning groove 413 of the main shaft 41, the position at which the first opening 456 is formed is not limited.

  Pinion gears 46 that mesh with the respective guide racks 452 of the slide sleeves 45 respectively mounted from both ends are rotatably attached to the mounting holes 414 of the shaft body 411. The guide rack 452 and the pinion gear 46 function as a contact / separation mechanism that moves the pair of slide sleeves 45 closer to and away from each other by the same distance from the reference position of the main shaft 41, as shown in FIGS. 7 (a) and 7 (b). When one slide sleeve 45 is moved in the axial direction, the other slide sleeve 45 is also moved in the opposite direction by the same amount in conjunction with the movement, and the pair of slide sleeves 45 moves the center position C of the main shaft 41. It is configured to be close to or apart from each other.

Next, the configuration of the roll paper guide 43 in the print medium supply apparatus according to the present embodiment will be described in detail with reference to FIGS.
8A and 8B are views showing the configuration of the roll paper guide shown in FIG. 3, wherein FIG. 8A is a view seen from the axial direction, and FIG. 8B is a side view. 9 is an exploded perspective view showing the internal configuration of the roll paper guide shown in FIG. 8, FIG. 10 is an explanatory view for explaining the operation of the roll paper guide shown in FIG. 8, and FIG. It is a perspective view explaining the attachment operation | movement to the slide sleeve of the roll paper guide shown.

  3 and 8, the roll paper guide 43 includes a cylindrical body portion 431 that is wrapped around the slide sleeve 45 and four guide plates 432 that extend radially from the body portion 431. The inner periphery of the roll paper guide 43 has substantially the same shape as the outer periphery of the slide sleeve 45, and the movement of the roll paper 31 in the width direction is restricted by the guide plate 432 while being wrapped around the slide sleeve 45. However, it is rotated together with the main shaft 41 (slide sleeve 45). In the present embodiment, the four guide plates 432 are configured to radially extend from the body portion 431. However, if the guide plates 432 extend radially from the body portion 431, the guide plate 432 The number is not limited, and the guide plate 432 may be configured in a disc shape.

  In addition, the body portion 431 enters two first openings 456 formed in the slide sleeve 45 and functions as two first engaging means for integrating the roll paper guide 43 and the slide sleeve 45. The convex piece 433 is provided so as to protrude to the inner periphery 431a with a predetermined interval, and enters the second opening 457 formed in the slide sleeve 45, and the positioning groove 413 of the main shaft 41. The second convex piece 434 that functions as an engaging means for integrating the roll paper guide 43, the slide sleeve 45, and the main shaft 41 is engaged with the inner periphery from between the two first convex pieces 433. 431a projecting direction (hereinafter, the direction in which the first projecting piece 433 and the second projecting piece 434 project to the inner periphery 431a of the body portion 431 is referred to as projecting direction). Referred to). Further, the first opening 456 formed in the slide sleeve 45 and the first protrusion 433 and the second protrusion 434 are moved on the outer periphery of the body portion 431 in a direction opposite to the protruding direction. The first operation unit 435 that releases the integration of the roll paper guide 43, the slide sleeve 45, and the main shaft 41 by retreating from the second opening 457, and the second convex piece 434 are reversed in the protruding direction. To move the second convex piece 434 and the positioning groove 413 of the main shaft 41 only, thereby releasing the integration of the roll paper guide 43 and the slide sleeve 45 and the main shaft 41. (Hereinafter, the first convex piece 433 and the second convex piece 434 in the direction opposite to the protruding direction are retracted from the inner periphery 431a of the body part 431). That direction referred to as the exit direction).

  Referring to FIG. 9, an opening 437 a having the same size as the inner periphery 431 a of the body portion 431 is formed inside the body portion 431, and the first convex pieces 433 are spaced at predetermined intervals so as to protrude into the opening 437 a. A first operation plate 437 provided with two openings and a first operation portion 435 on the outer periphery, and an opening 438a having the same size as the inner periphery 431a of the body portion 431 are formed. A second convex piece 434 formed with a groove portion (convex portion) 434a that engages with the positioning groove 413 of the shaft body 411 is provided at the tip portion so as to protrude into the opening 438a, and the second convex piece 434 is provided on the outer periphery. As shown in FIG. 10A, the first operation plate 437 and the second operation plate 438 are overlapped with each other so that the second operation plate 438 on which the operation unit 436 is provided overlaps the body portion 431. Opening 43 in inner periphery 431a a and opening 438a are assembled to face. The first operation plate 437 and the second operation plate 438 are assembled such that the first convex piece 433 and the second convex piece 434 are movable in the protruding direction and the retracting direction. By operating, that is, pushing down 435, the first operating plate 437 is moved in the retracting direction in which the first convex piece 433 is retracted from the inner periphery 431a of the body portion 431, and the second operating portion 436 is operated, that is, pushed down. Thus, the second operation plate 438 is configured to be movable in the retracting direction in which the second convex piece 434 retracts from the inner periphery 431a of the body portion 431. A lower portion of the second operation plate 438 is formed with a flange portion 438b on which the lower surface of the first operation plate 437 is placed, and when the first operation plate 437 is pushed down in the retracting direction. The lower surface of the first operation plate 437 acts on the flange portion 438b of the second operation plate 438, and the second operation plate 438 is moved in the retracting direction together with the first operation plate 437. . A first spring 439 is interposed between the lower surface of the first operation plate 437 and the flange portion 438 b of the second operation plate 438, and the first operation plate 437 is provided by the first spring 439. Is biased away from the second operation plate 438 in the protruding direction, and a second spring 440 is interposed between the lower surface of the second operation plate 438 and the body portion 431, The second operation plate 438 is biased in the protruding direction by the second spring 440.

  When the first operation unit 435 and the second operation unit 436 are not operated, that is, when the first operation unit 435 and the second operation unit 436 are not pushed down in the retracting direction, the second projecting piece 434 is deformed by the biasing force in the projecting direction by the second spring 440. The second operation plate 438 is moved so as to protrude to the inner periphery 431 a of the portion 431, and the flange portion 438 b of the second operation plate 438 acts on the lower surface of the first operation plate 437, thereby Since the first operation plate 437 is moved so that the protruding piece 433 protrudes to the inner periphery 431a of the body part 431, the first operation plate 437 is moved to the inner periphery 431a of the body part 431 as shown in FIG. The first convex piece 433 and the second convex piece 434 are projected. In this state, the height of the second projecting piece 434 in the protruding direction is longer than that of the first projecting piece 433, and the roll paper guide 43 is wrapped around the slide sleeve 45, so that the first operation unit 435 is installed. When the second operating portion 436 is not operated, the second convex piece 434 enters the second opening 457 formed in the slide sleeve 45, and the tip of the second convex piece 434 The groove portion 434a is engaged with the positioning groove 413 of the main shaft 41, the movement of the slide sleeve 45 and the roll paper guide 43 in the axial direction is restricted, and the main shaft 41, the slide sleeve 45, and the roll paper guide 43 are integrated. On the other hand, the height of the first projecting piece 433 in the protruding direction is shorter than that of the second projecting piece 434. Therefore, the first projecting piece 433 does not reach the positioning groove 413 of the main shaft 41, and the slide sleeve. The roll paper guide 43 and the slide sleeve 45 are integrated together by entering the first opening 456 formed in 45.

  Referring to FIG. 9 in a state where the first operation unit 435 and the second operation unit 436 are not operated, that is, in a state where the main shaft 41, the slide sleeve 45, and the roll paper guide 43 are integrated, the roll paper guide An operation restriction port 442 and an operation restriction port 443 are formed in the first operation plate 437 and the second operation plate 438 at positions facing the pin insertion port 441 provided in the body portion 431 of 43. Accordingly, by inserting a pin (not shown) from the pin insertion port 441, the inserted pin is also inserted into the operation restriction port 442 and the operation restriction port 443. Therefore, the first operation plate 437 and the second operation plate Is fixed, and the first operation unit 435 and the second operation unit 436 cannot be operated. For example, when the roll paper 31 having the same width is always used, by inserting a pin into the pin insertion opening 441 of one roll paper guide 43, the other roll paper guide 43 is removed when the roll paper 31 is replaced. However, since the slide sleeve 45 is positioned on the main shaft 41, when the roll paper guide 43 is attached, it is not necessary to perform alignment again, and the roll paper 31 can be easily replaced.

  Further, when the second operation portion 436 is operated, that is, when it is pushed down in the retracting direction, the second operation plate 438 alone moves in the retracting direction against the urging force in the protruding direction by the second spring 440. In the direction in which the first operation plate 437 is separated from the second operation plate 438 by the first spring 439, that is, the first convex piece 433 protrudes to the inner periphery 431a of the body portion 431. Since it is in the moved state, as shown in FIG. 10B, only the first convex piece 433 protrudes from the inner periphery 431a of the trunk portion 431, and the second convex piece 434 is the inner circumference of the trunk portion 431. The engagement between the second convex piece 434 and the positioning groove 413 of the main shaft 41 is released in a state of being substantially retracted from 431a. Accordingly, only the integration of the slide sleeve 45 and the roll paper guide 43 and the main shaft 41 is released, and the roll paper guide 43 and the slide sleeve 45 are integrated by the protrusion of the first convex piece 433, and the roll The paper guide 43 and the slide sleeve 45 can be moved in the axial direction. In the present embodiment, the same roll paper guide 43 is attached to the slide sleeves 45 on both sides that move in conjunction with each other. Therefore, in a state where the roll paper guides 43 are attached to the slide sleeves 45 on both sides, even if only the second operation unit 436 in one roll paper guide 43 is operated, the other roll paper guide 43 is not connected to the main shaft 41. Since the roll paper guide 43 and the slide sleeve 45 cannot be moved in the axial direction, the roll paper guide 43 is attached to the slide sleeves 45 on both sides. When the guide 43 is moved, it is necessary to operate the second operation unit 436 in both roll paper guides 43.

  Further, when the first operation unit 435 is operated, that is, when the first operation unit 435 is pushed down in the withdrawal direction, the lower surface of the first operation plate 437 acts on the flange portion 438b of the second operation plate 438, thereby The second operation plate 438 is also moved in the withdrawal direction together with the first operation plate 437 by the operation portion 435, and as shown in FIG. The protruding piece 434 is retracted from the inner periphery 431a of the body portion 431, and the engagement between the second protruding piece 434 and the positioning groove 413 of the main shaft 41 is released, and the second protruding piece 434 is also released. The first convex piece 433 exits from the second opening 457 formed in the slide sleeve 45 and the first opening 456 formed in the slide sleeve 45, respectively. Accordingly, the integration of the roll paper guide 43 with the slide sleeve 45 and the main shaft 41 is released, and the roll paper guide 43 is attached to or detached from the slide sleeve 45. When only the first operation unit 435 in one roll paper guide 43 is operated, the other roll paper guide 43 is integrated with the main shaft 41 and the slide sleeve 45, that is, the other slide sleeve. 45 and the roll paper guide 43 are positioned. Therefore, when the roll paper 31 having the same width is mounted on the main shaft 41 for replacement, the slide sleeve 45 is attached to the main shaft 41 even if only one roll paper guide 43 is removed as shown in FIG. Since the roll paper guide 43 is attached, it is not necessary to perform alignment again when the roll paper guide 43 is attached, so that the roll paper 31 can be easily replaced.

  In this embodiment, the roll paper guides 43 on both sides are configured to be removable, but the guide plate 432 is fixed to one slide sleeve 45 and only the other roll paper guide 43 can be removed. It can also be configured.

  In the present embodiment, the first operation unit 435 and the first convex piece 433 provided on the first operation plate 437 and the second operation unit 436 provided on the second operation plate 438 are provided. By using the second convex piece 434, the roll paper guide 43 is integrated with the slide sleeve 45 and the main shaft 41, the roll paper guide 43 is integrated only with the slide sleeve 45, and Although the roll paper guide 43 is configured to switch between the state in which the roll paper guide 43 is not integrated with the slide sleeve 45 and the main shaft 41, the first operation plate 437 (the first operation unit 435 and the first convex piece 433) is changed. Omitted and only the second operation portion 436 and the second convex piece 434 provided on the second operation plate 438 are used, so that the above three states can be switched. There. That is, by half-pressing the second operation portion 436, the engagement between the second convex piece 434 and the positioning groove 413 of the main shaft 41 is released, and the second convex piece 434 enters the second opening 457. The roll paper guide 43 that is entering can be integrated only with the slide sleeve 45, and the above-described three states can be switched by operating the second operation unit 436. It becomes possible.

Next, the configuration of the support plate 42 in the print medium supply apparatus of the present embodiment will be described in detail with reference to FIG.
FIG. 12 is a side view showing the configuration of the support plate shown in FIG.

  Referring to FIG. 12A, the pair of support plates 42 are formed with two bearing portions 421 and 422 at positions having different heights from the bottom surface. The bearing portions 421 and 422 are groove portions formed in a substantially U shape having substantially the same size as the shaft shaft 412. A material that reduces friction with the shaft shaft 412, for example, the shaft shaft 412 is a metal material. In this case, at least the bearing portions 421 and 422 of the support plate 42 are made of synthetic resin. As shown in FIG. 12B, the bearing portion 421 formed at a high position is used when the main shaft 41 on which the roll paper 31 having a large winding diameter is mounted is bridged, and is formed at a low position. As shown in FIG. 12C, the bearing portion 422 is used when the main shaft 41 on which the roll paper 31 having a small winding diameter is mounted is bridged. The two bearing portions 421 and 422 having different heights from the bottom surface can be used properly according to the winding diameter of the roll paper 31 to be mounted in this way. In addition, the roll paper guide 43 having a different guide plate 432 length is prepared for each of the two bearing portions 421 and 422 having different heights from the bottom surface, and one of the roll paper guides 432 has a winding diameter. In other words, the main shaft 41 may be properly used depending on which of the bearing portions 421 and 422 is bridged.

Next, the configuration of the damper means 5 in the print medium supply apparatus of the present embodiment will be described in detail with reference to FIGS.
13 is a perspective view showing the configuration of the damper means shown in FIG. 1, FIG. 14 is an exploded perspective view showing the configuration of the damper roller shown in FIG. 13, and FIG. 15 shows the operation of the damper roller shown in FIG. FIG. 16 is an explanatory diagram illustrating a state in which a printing medium is supplied to the printing apparatus via the damper unit illustrated in FIG. 1, and FIG. 17 is formed on the damper guide illustrated in FIG. It is explanatory drawing explaining the space | interval of the set part currently performed.

  Referring to FIG. 13, the damper means 5 includes a damper roller 51 and a damper guide 52 around which the damper roller 51 is bridged. The damper means 5 is mounted on the front side of the main body frame 2 substantially in parallel with the main shaft 41, that is, attached to the main shaft 41. The inertial load when the printing medium 3 is supplied to the printing apparatus 1 from the roll paper support mechanism 4 disposed on the back side of the main body frame 2 by the damper roller 51 disposed substantially parallel to the rolled paper 31. Reduce.

  Referring to FIG. 14, the damper roller 51 is attached to the damper shaft 511 via the cylindrical damper shaft 511, two conical springs 512 attached to a substantially central portion of the damper shaft 511, and the conical spring 512. And a cylindrical roller body 513. The two conical springs 512 are respectively provided with end portions having a small diameter at the substantially central portion of the damper shaft 511 so that end portions having a large diameter are disposed at both ends of the damper shaft 511. The conical springs 512 arranged at both ends of the shaft 511 are attached to the ends having large diameters so that the inner peripheries of both ends of the roller body 513 are circumscribed. Accordingly, as shown in FIGS. 15A and 15B, the roller body 513 has elasticity with respect to the damper shaft 511 and can be displaced in the vertical direction, and above or below the roller body 513. Regardless of which side is in contact with the printing medium 3, the inertia load when the printing medium 3 is supplied from the roll paper support mechanism 4 to the printing apparatus 1 due to the displacement of the roller body 513 is reduced. As a result, the print quality can be ensured. Further, as shown in FIGS. 15C and 15D, the roller body 513 has elasticity with respect to the damper shaft 511 and can be displaced obliquely, so that the roller body 513 is above or below the roller body 513. Absorbing the skew of the printing medium 3 when the printing medium 3 is supplied from the roll paper support mechanism 4 to the printing apparatus 1 regardless of which side is in contact with the printing medium 3 Can do.

  As described above, the damper effect can be generated regardless of whether the upper or lower portion of the roller body 513 is in contact with the printing medium 3, so that the front winding, that is, the label or the printing surface can be removed. Both of the roll paper 31 in the state of being wound outward and the roll paper 31 in the state of being wound with the reverse side, i.e., the label and the surface to be printed inside, can be dealt with. In FIG. 16A, the front roll paper 31 mounted on the roll paper support mechanism 4 is supplied to the printing apparatus 1 with the print medium 3 in contact with the lower side of the roller body 513. In FIG. 16B, the state is that the reverse roll paper 31 mounted on the roll paper support mechanism 4 is supplied to the printing apparatus 1 with the print medium 3 in contact with the upper side of the roller body 513. The print medium 3 comes into contact with the roller body 513 regardless of whether the roll paper 31 mounted on the roll paper support mechanism 4 is front-side or back-side. This can be dealt with by changing the side (upper or lower).

  Referring to FIG. 13, the damper guide 52 has a pair of upright portions 521 arranged in parallel at intervals, and the upright portions 521 have four locations where the end portions of the damper shaft 511 are set. The set portions 522a, 522b, 522c, and 522d are formed at different heights, and the passage 523 that connects the four set portions 522a, 522b, 522c, and 522d and has a wider interval than the diameter of the damper shaft 511. Is formed. FIG. 13 shows a state in which the end portion of the damper shaft 511 is set to the set portion 522a arranged at the highest position, and the other set portions 522b, 522c, and 522d have the damper guide 52 to the damper. Without removing the shaft 511, the damper roller 51 can be arranged at four different heights by moving it through the passage 523. In addition, a protrusion 524 that narrows the interval between the passages 523 is formed in the passages 523 that reach the set portions 522a, 522b, 522c, and 522d. Accordingly, it is possible to prevent the damper shaft 511 set in the set portions 522a, 522b, 522c, and 522d from being pushed out to the passage 523 by an unintended external force, and the damper shaft 511 is prevented from being set to the set portions 522a, 522b, 522c, and 522d. Can be set firmly on. In this embodiment, the four set portions 522a, 522b, 522c, and 522d are formed. However, the number of the set portions can be appropriately set according to the target printing device 1 or roll paper 31. .

  Referring to FIG. 17, the distance H between adjacent set portions 522a, 522b, 522c, and 522d, that is, the difference in height is set such that R <H <2R, where R is the radius of the roller body portion 513. Yes. Accordingly, the lower side of the roller body portion 513 in the damper roller 51 set on the higher one of the adjacent set portions 522a, 522b, 522c, 522d (the set portion 522a in FIG. 17) and the lower one (in FIG. 17, The difference in height L between the damper roller 51 set on the set portion 522b) and the upper side of the roller body portion 513 is L <R, and the height of the damper roller 51 is increased regardless of whether the roll paper 31 is front-side wound or reverse-side wound. In addition to changing the height, by changing the side (upper side or lower side) where the printing medium 3 comes into contact with the roller body portion 513, it is possible to perform under substantially the same conditions of the printing medium 3 to the printing apparatus 1. . That is, the front roll paper 31 is supplied to the printing apparatus 1 via the upper side of the roller body 513, and the reverse roll paper 31 is supplied to the printing apparatus 1 via the lower side of the roller body 513. In the damper roller 51 set at the same position, the height supplied to the printing apparatus 1 differs depending on the diameter 2R of the roller body portion 513 between the upper side and the lower side of the roller body portion 513. In the case of the roll paper 31, the height difference supplied to the printing apparatus 1 can be made equal to or less than the radius R of the roller body portion 513 by lowering the set position by one. In FIG. 16C, the damper roller 51 is set on the second highest setting portion 522b, and the front roll paper 31 mounted on the roll paper support mechanism 4 is printed on the lower side of the roller body portion 513. FIG. 16D shows a state in which the damper roller 51 is set on the third highest setting portion 522c and is attached to the roll paper support mechanism 4. The state in which the roll paper 31 is supplied to the printing apparatus 1 in a state where the print medium 3 is in contact with the upper side of the roller body 513 is shown, and is thus mounted on the roll paper support mechanism 4. Regardless of whether the roll paper 31 is a front roll or a reverse roll, the height of the damper roller 51 is changed, and the side (the upper side or the lower side) where the print medium 3 contacts the roller body 513 is changed. It is, it is possible to supply angle of the print medium 3 to the printing device 1 to be substantially the same.

  As described above, according to the present embodiment, the main portion in which the mounting portion 415 having the peripheral surface set substantially the same as the inner diameter of the smallest cylindrical body in the roll paper 31 assumed to be mounted is formed. The shaft 41 has substantially the same inner peripheral surface as the outer peripheral surface of the mounting portion 415, is larger than the outer peripheral surface of the mounting portion 415, and is substantially the same as the inner diameter of the cylindrical body of any roll paper 31 that is assumed to be mounted. A roll paper having the same inner peripheral surface and the smallest inner diameter of the cylindrical body by providing a donut-shaped first attachment 47 a that is detachably mounted on the outer peripheral surface of the mounting portion 415 of the main shaft 41. 31 can be mounted on the mounting portion 415 of the main shaft 41, and the roll paper 31 having a cylindrical inner diameter larger than the outer peripheral surface of the mounting portion 415 is mounted on the main shaft 41 when the roll paper 31 is replaced. Since the first attachment 47a can be mounted on the portion 415 and can be attached to the outer peripheral surface of the first attachment 47a, the inner diameter of the cylindrical body can be obtained simply by inserting / removing the first attachment 47a into / from the main shaft 41. There is an effect that it is possible to correspond to two types of roll papers 31 having different values.

  Furthermore, according to the present embodiment, the first attachment 47a is slid in the axial direction of the main shaft, whereby the mounting portion 415 of the main shaft 41 and the first attachment 47a are engaged and disengaged ( By forming the convex portion 416, the resin spring 417, and the concave portion 471) on the outer peripheral surface of the mounting portion 415 of the main shaft 41 and the inner peripheral surface of the first attachment 47a, it is tightened with a fastener using an instrument such as a driver. There is no need to loosen, and the first attachment 47a can be inserted into and removed from the main shaft 41.

  Furthermore, according to the present embodiment, the first attachment 47a has substantially the same inner peripheral surface as that of the first attachment 47a, and is larger than the outer peripheral surface of the first attachment 47a and is assumed to be mounted. By providing a donut-shaped second attachment 47b having an outer peripheral surface substantially the same as the inner diameter of the cylindrical body of the roll paper 31 and removably mounted on the outer peripheral surface of the first attachment 47a, The roll paper 31 having a cylindrical inner diameter larger than the outer peripheral surface of the attachment 47a is configured such that, when the roll paper 31 is replaced, the first attachment 47a is wrapped around the second attachment 47b, and the outer peripheral surface of the second attachment 47b. Therefore, by simply inserting / removing a plurality of attachments to / from the main shaft 41, it can be attached to a plurality of roll papers 31 having different inner diameters. An effect that can be. In addition, since the first attachment 47a can be stored in a state where the second attachment 47b is wrapped around, the storage location of the first attachment 47a and the second attachment 47b can be saved.

  Furthermore, according to the present embodiment, the first attachment 47a and the second attachment 47b are engaged and disengaged by sliding the second attachment 47b in the axial direction of the main shaft 41. The portion 472, the resin spring 473, and the recess 474) are formed on the outer peripheral surface of the first attachment 47a and the inner peripheral surface of the second attachment 47b, so that it is necessary to tighten and tighten with a fastener using an instrument such as a driver. The second attachment 47b can be inserted into and removed from the first attachment 47a.

  Note that the present invention is not limited to the above-described embodiments, and it is obvious that the embodiments can be appropriately changed within the scope of the technical idea of the present invention. In addition, the number, position, shape, and the like of the constituent members are not limited to the above-described embodiment, and can be set to a number, position, shape, and the like that are suitable for implementing the present invention. In each figure, the same numerals are given to the same component.

1 is a perspective view illustrating a configuration of an embodiment of a print medium supply apparatus according to the present invention. 1 is a perspective view showing a state in which an embodiment of a print medium supply apparatus according to the present invention is connected to a printer. It is a perspective view which shows the structure of the main shaft shown in FIG. 1, a roll paper guide, and a slide sleeve. It is a figure which shows the structure of the main shaft shown in FIG. 3, (a) is the side view seen from the plane side formed in the main shaft, (b) is the side surface which rotated (90) 90 degrees It is a figure and (c) is the figure seen from the axial direction. It is a perspective view which shows the structure of the attachment attached to the main shaft shown in FIG. It is a figure which shows the structure of the slide sleeve shown in FIG. 3, (a) is a side view seen from the side facing the plane formed in the main shaft, (b) rotates (a) 90 degrees. It is the made side view, (c) is the figure seen from the axial direction. It is explanatory drawing explaining operation | movement of the slide sleeve shown in FIG. It is a figure which shows the structure of the roll paper guide shown in FIG. 3, (a) is the figure seen from the axial direction, (b) is a side view. It is a disassembled perspective view which shows the internal structure of the roll paper guide shown in FIG. It is explanatory drawing explaining operation | movement of the roll paper guide shown in FIG. It is a perspective view explaining the attachment operation | movement to the slide sleeve of the roll paper guide shown in FIG. It is a side view which shows the structure of the support plate shown in FIG. It is a perspective view which shows the structure of the damper means shown in FIG. It is a disassembled perspective view which shows the structure of the damper roller shown in FIG. It is explanatory drawing explaining operation | movement of the damper roller shown in FIG. It is explanatory drawing which shows the state in which a to-be-printed medium is supplied to a printing apparatus via the damper means shown in FIG. It is explanatory drawing explaining the space | interval of the set part currently formed in the damper guide shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printing device 2 Main body frame 3 Medium to be printed 4 Roll paper support mechanism 5 Damper means 6 Positioning plate 31 Roll paper 41 Main shaft 42 Support plate 43 Roll paper guide 45 Slide sleeve 46 Pinion gear 47a First attachment 47b Second attachment 51 Damper roller 52 Damper guide 411 Shaft body 412 Shaft shaft 413 Positioning groove 414 Mounting hole 415 Mounting portion 416 Protruding portion 417 Resin spring 421, 422 Bearing portion 431 Body portion 431a Inner circumference
432 Guide plate 433 First convex piece 434 Second convex piece 434a Groove portion 435 First operation portion 436 Second operation portion 437 First operation plate 437a Opening 438 Second operation plate 438a Opening 438b Eave portion 439 First 1 spring 440 second spring 441 pin insertion port 442 operation restriction port 443 operation restriction port 451 cylindrical part 452 guide rack 453 flange part 454 convex part 455 leaf spring part 456 first opening 457 second opening 471 concave part 472 Convex part 473 Resin spring 474 Concave part 511 Damper shaft 512 Conical spring 513 Roller body part 521 Standing part 522a, 522b, 522c, 522d Set part 523 Passage 524 Protrusion part

Claims (4)

A printing medium supply device that rotatably supports a roll paper supplied to a printing means,
A main shaft formed with a mounting portion having an outer peripheral surface set substantially the same as the inner diameter of the smallest cylindrical body among the roll paper assumed to be mounted;
The outer peripheral surface has substantially the same inner peripheral surface as the outer peripheral surface of the mounting portion, is larger than the outer peripheral surface of the mounting portion, and is substantially the same as the inner diameter of the cylindrical body of any one of the roll papers that is assumed to be mounted. And a donut-shaped first attachment that is detachably mounted on the outer peripheral surface of the mounting portion of the main shaft.   By sliding the first attachment in the axial direction of the main shaft, a locking means for engaging and disengaging the mounting portion of the main shaft and the first attachment is provided on the mounting portion of the main shaft. The print medium supply device according to claim 1, wherein the print medium supply device is formed on an outer peripheral surface and an inner peripheral surface of the first attachment.   It has an inner peripheral surface substantially the same as the outer peripheral surface of the first attachment, is larger than the outer peripheral surface of the first attachment, and is substantially the same as the inner diameter of the cylindrical body of the roll paper that is supposed to be mounted. 3. The print medium according to claim 1, further comprising a donut-shaped second attachment that has the same outer peripheral surface and is detachably mounted on the outer peripheral surface of the first attachment. Feeding device.   Locking means for engaging and disengaging the first attachment and the second attachment by sliding the second attachment in the axial direction of the main shaft includes an outer peripheral surface of the first attachment and the first attachment. 4. The print medium supply device according to claim 3, wherein the print medium supply device is formed on an inner peripheral surface of the second attachment.

Images