JP2017132576A - Paper conveyance mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper conveyance mechanism that is able to efficiently correct curling of paper portion drawn from a roll of paper.SOLUTION: A paper conveyance mechanism comprises: a smoothing part S that comes into contact with the other side of a paper portion P conveyed from rolled paper R and corrects curing of the paper portion P; an upstream pressing part F1 disposed upstream of the smoothing part S in a conveyance direction of the paper portion P and pressing the paper portion P from one side; a downstream pressing part F2 disposed downstream of the smoothing part S in the conveyance direction and pressing the paper portion P from the one side thereof; and an adjustment mechanism 6 that adjusts the position of the smoothing portion S in a thickness direction of the paper position P.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a paper transport mechanism that transports a paper portion drawn from roll paper.

  2. Description of the Related Art A paper conveyance mechanism that pulls out a paper portion from a roll paper in which a long paper is wound in a roll shape and conveys the paper portion is employed in a printer, a facsimile machine, or the like (see, for example, Patent Document 1). The paper transport mechanism described in Patent Document 1 includes a platen roller, an idler roller disposed between the platen roller and roll paper, and the print head is disposed opposite to the platen roller. In a printer, a facsimile machine, or the like described in Patent Document 1 or the like, generally, a paper portion is pulled out from the accommodated roll paper, and this paper portion is set between the platen roller and the print head. By doing so, the paper portion pulled out from the roll paper is conveyed in a predetermined conveyance direction as the platen roller rotates. The paper portion is printed by the print head, then cut by a cutter and discharged as a receipt or the like.

JP 2014-51009 A

  The roll paper used in the paper transport mechanism described in Patent Document 1 is compact and has high storage efficiency, but on the other hand, since it is wound in a roll shape, the paper portion is curled. As a result, a receipt or the like cut to a predetermined length may be rounded, and may be difficult to handle and look bad. For this reason, for example, in the case of a printer that is installed in a store or the like and issues a receipt for credit settlement, the store clerk halves the rounded receipt so that the customer can easily sign the receipt. It takes time and effort, such as folding and pulling to fix the curl and handing the receipt to the customer.

  SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a paper transport mechanism that can efficiently correct curling of a paper portion drawn from roll paper.

The paper transport mechanism of the present invention that solves the above-mentioned object is a paper transport mechanism for a paper portion that has been transported from a roll paper wound in a roll shape with one side of the long paper facing inward and the other side facing out. An ironing part that touches the surface on the other side and corrects curl of the paper part;
An upstream presser part that is disposed upstream of the ironing part in the conveying direction of the paper part and presses the paper part from the one side;
A downstream presser part that is disposed downstream of the ironing part in the transport direction and presses the paper part from the one side;
And an adjustment mechanism for adjusting the position of the ironing portion in the thickness direction of the paper portion.

  According to the paper transport mechanism of the present invention, the paper portion is squeezed by the ironing portion while being pressed from the one side by the upstream side pressing portion and the downstream side pressing portion. Thereby, the curl of the paper portion can be corrected. Hereinafter, the force for squeezing the paper portion by the squeezing portion and correcting the curl of the paper portion may be referred to as correction force. This correction force varies depending on the angle of the paper portion in a state where it is pressed by the upstream side presser and the downstream side presser and bent by the ironing unit, and the correction force increases relatively as the angle decreases. Become. Hereinafter, the angle of the sheet portion in a state where it is pressed by the upstream side pressing portion and the downstream side pressing portion and bent by the squeezing portion may be referred to as a squeezing angle. The paper transport mechanism of the present invention can change the size of the ironing angle by adjusting the position of the ironing portion in the thickness direction of the paper portion by the adjusting mechanism. Thereby, the correction force can be easily adjusted. Here, the adjustment mechanism may adjust the correction force by moving the position of the ironing portion in the thickness direction of the paper portion. In addition, the adjustment of the corrective force takes into account the proper corrective force in consideration of the paper attributes such as thickness, waist and basis weight, environmental conditions such as humidity and temperature, or operating conditions such as the speed at which the paper part is conveyed (conveyance speed). Should be set. By doing so, it is possible to avoid the problem that the curl correction becomes insufficient or, conversely, the correction force is too strong and the opposite curl is attached.

  In the paper transport mechanism of the present invention, it is preferable that the adjusting mechanism adjusts an initial position that is a position of the ironing portion before the transport of the paper portion is started.

  Here, the initial position may be, for example, the position of the ironing portion in a state where the paper portion is not in contact before the paper portion is set between the platen roller and the print head. The initial position is, for example, the state in which the paper portion is in contact with the paper portion in a so-called standby state in which the paper portion is set between the platen roller and the print head and conveyance of the paper portion is stopped. It may be the position of the ironing part. Further, the initial position is, for example, in the standby state in which the paper portion is not set between the platen roller and the print head and the paper portion is in contact with the ironing portion. It may be a position.

  Furthermore, it is preferable that the paper transport mechanism of the present invention further includes a biasing member that biases the ironing portion toward the one side.

  By providing the urging member, when the roll diameter of the roll paper changes and the tension in the transport direction applied to the paper portion changes, the ironing portion moves according to the magnitude of the changed tension, A mode in which the size is changed can be adopted. Thereby, in addition to the adjustment of the correction force by the adjustment mechanism, for example, an adjustment that increases the correction force as the roll diameter decreases and the curl of the paper portion increases becomes possible. Further, it is possible to reduce the transport load at the time of the initial movement.

  Furthermore, in the paper transport mechanism of the present invention, the adjustment mechanism may adjust the position of the ironing portion together with the position of the urging member.

  Furthermore, in the paper transport mechanism of the present invention, a configuration including a support member that supports the squeezing part while keeping the position of the squeezing part at the initial position is also one preferred aspect.

  Here, the support member may include an expansion / contraction mechanism that can expand and contract in the thickness direction of the paper portion, and the adjustment mechanism may be the expansion / contraction mechanism.

  According to the paper transport mechanism of the present invention, it is possible to efficiently correct curling of the paper portion drawn from the roll paper.

It is a figure for demonstrating the curl of the paper part pulled out from the roll paper. It is a figure which shows notionally the technical idea which corrects the curl of the paper part in the paper conveyance mechanism of this invention. It is the perspective view which looked at the printer which is one embodiment of the present invention from the front right slanting upper part. FIG. 4 is a plan view of the printer shown in FIG. 3 viewed from above. It is a perspective view which expands and shows the decal member shown in FIG. 3 and FIG. It is a figure for demonstrating a mode that the position of an ironing part is adjusted to the thickness direction of a paper part. FIG. 4 is a block diagram illustrating a circuit configuration of the printer illustrated in FIG. 3. FIG. 10 is a diagram for explaining a state in which the position of the ironing portion is adjusted in the thickness direction of the paper portion in a modified example.

  Embodiments of the present invention will be described below with reference to the drawings. The paper transport mechanism of the present invention can be applied to various devices that transport the paper portion by pulling out the paper portion from the roll paper. Not only printers and facsimile machines, but also devices that do not have functions such as printing and printing. It can also be applied to. First, the concept of the paper transport mechanism of the present invention will be described with reference to FIGS.

  FIG. 1 is a diagram for explaining curling of a paper portion drawn from roll paper, and FIG. 2 is a technique for correcting curling of the paper portion P in the paper transport mechanism 10 of the present invention. It is a figure which shows an idea notionally.

  As shown in FIG. 1, the roll paper R is rolled in a roll shape with one side of the long paper facing inside and the other side facing outside. Hereinafter, the surface on one side of the sheet or sheet portion P may be referred to as an inner surface Pi, and the surface on the other side may be referred to as an outer surface Po. The paper portion P wound in a roll shape has a curl and is pulled out from the roll paper R, and the paper portion P cut to a predetermined length is rounded with the inner surface Pi side inward. Here, the degree of curling of the paper portion varies depending on, for example, paper attributes such as thickness and environmental conditions such as humidity, as shown by arrows in FIG.

  As shown in FIG. 2, the paper transport mechanism 10 of the present invention includes a squeezing part S, an upstream side pressing part F1, and a downstream side pressing part F2. In FIG. 2, the paper portion P is conveyed from the roll paper R obliquely to the left and upward as indicated by the thin straight arrow. On the transport path along which the paper portion P is transported, the upstream presser portion F1, the ironing portion S, and the downstream presser portion F2 are arranged in the order of description from the upstream side in the transport direction. The squeezing part S is in contact with the outer surface Po of the paper part P and squeezes the paper part P. Hereinafter, the inner surface Pi side may be referred to as one side, and the outer surface Po side may be referred to as the other side. The upstream side presser portion F1 is disposed upstream of the ironing portion S in the transport direction, and presses the paper portion P from one side. Further, the downstream presser portion F2 is disposed downstream of the ironing portion S in the transport direction, and presses the paper portion P from one side.

  The sheet portion P is bent at a predetermined angle at a portion in contact with the ironing portion S by the ironing portion S, the upstream side pressing portion F1, and the downstream side pressing portion F2. Hereinafter, this bending angle is referred to as an ironing angle α. When the paper portion P passes through the ironing portion S in this state, the paper portion P is ironed by the ironing portion S, and the curl of the paper portion P can be corrected. The magnitude of the correction force applied to the paper portion P by being squeezed by the squeezing portion S varies depending on the squeezing angle α, and the rectifying force increases as the squeezing angle α decreases. Further, as with the degree of curling, the effect of the correction force varies depending on the thickness and humidity of the paper. For example, even when the correction force having the same strength is applied to the paper portion P, the paper portion P is relatively easily corrected as the humidity increases, and the paper portion P is relatively relatively reduced as the paper thickness is reduced. It becomes easy to be corrected. Further, the magnitude of the correction force applied to the paper portion P also varies depending on the conveyance speed of the paper portion P, and the correction force increases relatively as the conveyance speed is decreased.

  The paper transport mechanism 10 of the present invention includes an adjustment mechanism that adjusts the position of the ironing portion S in the thickness direction of the paper portion P. The detailed mode of the adjustment mechanism will be described later. By this adjustment mechanism, for example, the ironing portion S at a position where the paper portion P is not in contact is moved to one side as shown by a two-dot chain line in FIG. 2 to reduce the ironing angle α. Adjustment to increase the correction force and, as indicated by the alternate long and short dash line in FIG. 2, the correction is performed by moving the ironing portion S at the position where the paper portion P is not in contact to the other side and increasing the ironing angle α. At least one of adjustment to reduce the force can be performed. That is, the paper transport mechanism 10 of the present invention includes an adjustment mechanism that adjusts the position of the ironing portion S according to the paper attributes such as thickness, environmental conditions such as humidity, or operating conditions such as transport speed. Yes, the adjusting mechanism can set the ironing angle α to an appropriate angle. As a result, it is possible to avoid a problem that the curl correction becomes insufficient or, conversely, the correction force is too strong to cause the opposite curl.

  Hereinafter, an embodiment in which the present invention is applied to a printer will be described based on the concept of the present invention described with reference to FIGS. 1 and 2.

  FIG. 3 is a perspective view of the printer 1 according to an embodiment of the present invention as viewed from the front right and diagonally upward, and FIG. 4 is a plan view of the printer 1 shown in FIG. 3 as viewed from above. The printer 1 shown in FIGS. 3 and 4 accommodates roll paper (not shown in FIGS. 3 and 4) in which a long heat-sensitive paper is wound in a roll shape, and the paper portion of the accommodated roll paper is stored. This is a thermal printer that prints on the paper portion while pulling out from the lower side and cuts the printed paper portion. In FIG. 3, the diagonally lower left side is the front side (front side), and the upper right diagonal side is the rear side (back side). In FIG. 4, the left side is the front side (front side), and the right side is the back side (back side). Hereinafter, the front, rear, left, and right may be properly used based on the state in which each component is assembled to the printer 1.

  As shown in FIGS. 3 and 4, the printer 1 includes a printer main body 2, a printer cover 3, and a front cover 4. In FIG. 4, the printer cover 3 is omitted. The printer cover 3 is pivotally attached to the printer main body 2 by one end of the printer cover 3 being hinged to the rear upper portion of the printer main body 2, and the printer main body can be rotated by rotating the printer cover 3. 2 can be opened and closed. FIG. 3 shows a state where the printer cover 3 is opened. The front cover 4 is detachably attached to the front upper portion of the printer body 2.

  The printer main body 2 is provided with a storage unit 21 that stores roll paper. In the printer 1 of the present embodiment, roll paper is placed in the accommodating portion 21 with the printer cover 3 opened as shown in FIG. The accommodating portion 21 has a support portion 211 that supports roll paper and a pair of side wall portions 212 and 212. When the printer cover 3 is closed, a paper discharge port 41 is formed between the front cover 4 and the printer cover 3. In FIG. 3, the paper discharge port 41 is indicated by the reference numerals of the front cover 4 and the printer cover 3 that define the paper discharge port 41. In the printer 1 shown in FIG. 3, a path connecting the storage unit 21 and the paper discharge port 41 is a paper transfer route, and a direction from the storage unit 21 toward the paper discharge port 41 corresponds to a transfer direction in the present invention. A decurling member 5 having an ironing portion S shown in FIG. 2 is provided on the downstream side of the accommodating portion 21 in the transport direction.

  FIG. 5 is an enlarged perspective view showing the decal member 5 shown in FIGS. 3 and 4.

  As shown in FIG. 5, the decal member 5 includes a main body 51 and a shaft 52 attached to the main body 51. In addition, although the main-body part 51 of this embodiment also has a spring, it demonstrates later using FIG. The main body 51 is a plate-like member that is long in the left-right direction, and claw portions 512 are provided on the upper-end side portion on the downstream side (front side) in the transport direction at three locations, both end portions and the central portion, in the left-right direction. A notch 511 is formed between the claw portions 512. The shaft 52 is made of metal, and in this embodiment, a shaft having a diameter of about 2 mm is adopted. Further, a reduced diameter portion 521 having a diameter reduced to about 1.7 mm is formed at a position corresponding to the claw portion 512 in the shaft 52. The shaft 52 is rotatably attached to the main body 51 by fitting the reduced diameter portion 521 into the claw portion 512. The shaft 52 may be fixed to both ends in the left-right direction, avoiding the conveyance path of the paper portion P, in the main body 51 by E-rings or the like. The shaft 52 has a squeezing portion S, which will be described in detail later. Although hidden behind the front cover 4 in FIGS. 3 and 4, a cutter unit 43 and a print head 42, which will be described later with reference to FIG. 6, are provided on the downstream side of the decurling member 5 in the transport direction.

  As shown in FIG. 3, the printer cover 3 is provided with a platen roller 31 extending in the left-right direction and a platen gear 311 for transmitting the rotational force generated by a conveyance motor (not shown) to the platen roller 31. Further, a fixed blade 32 is provided on the downstream side in the conveyance direction of the platen roller 31. In the printer 1 of the present embodiment, after the roll paper is arranged in the accommodating portion 21 with the printer cover 3 opened, the front end portion of the paper portion of the roll paper becomes the paper discharge port 41 before the printer cover 3 is closed. Pull it out of the printer. When the printer cover 3 is closed in this state, the platen roller 31 comes into contact with the print head 42 (see FIG. 6) with an appropriate pressure. As a result, the paper portion drawn from the roll paper is sandwiched and set between the platen roller 31 and the print head 42. The sandwiched paper portion is transported in the transport direction by the frictional action between the platen roller 31 and the print head 42 as the platen roller 31 rotates. Further, printing is performed on the paper portion by the print head 42, and the cutter unit 43 (see FIG. 6) is driven to cut the paper portion into a predetermined length.

  A downstream guide member 33 is provided on the upstream side of the platen roller 31 in the conveying direction. The downstream guide member 33 has a downstream pressing portion F2 shown in FIG. An upstream guide member 34 is provided on the upstream side in the transport direction of the downstream guide member 33. The upstream guide member 34 has an upstream pressing portion F1 shown in FIG.

  FIG. 6 is a diagram for explaining how the position of the ironing portion S is adjusted in the thickness direction of the paper portion P. 6A and 6C, the printer 1 shown in FIGS. 3 and 4 is cross-sectioned in the front-rear direction, and the conveyance path of the paper portion P drawn from the roll paper R accommodated in the accommodating portion 21, The member arrange | positioned at this conveyance path | route is shown typically. Further, the paper portion P is indicated by a broken line so that it can be easily distinguished from the members of the printer 1. Note that the paper portion P is drawn from the roll paper R, sandwiched between the platen roller 31 and the print head 42, and then cut by the cutter unit 43 and discharged from the paper discharge port 41 (see FIG. 3). The direction of P is the transport path, and the direction from the roll paper R toward the paper discharge port 41 is the transport direction.

  FIG. 6A shows a state before the position of the ironing portion S is adjusted by the adjusting mechanism 6 described later. Hereinafter, among the initial positions that are the positions of the ironing section S before the conveyance of the paper portion P is started, the position of the ironing section S before the adjustment by the adjustment mechanism 6 is referred to as an initial position before the adjustment, and the adjustment mechanism. 6 and may be described separately from the position of the ironing portion S (initial position after adjustment) before the start of paper conveyance. In FIG. 6A and FIG. 6C, a part of the roll paper R is omitted.

  As shown in FIG. 6A, an installation unit 213 for installing the main body 51 of the decal member 5 is provided on the downstream side in the transport direction from the support unit 211 of the storage unit 21 in which the roll paper R is stored. Yes. Further, a receiving bottom portion 61 is provided on the downstream side in the transport direction from the installation portion 213. The receiving bottom 61 is a member that receives the spring 513 and is rotatably provided by a hinge member 62 that extends in a direction perpendicular to the paper surface. Here, the receiving bottom part 61 is not restricted to the aspect which rotates, For example, it can also be set as the aspect to which the receiving bottom part 61 moves by making it a structure where a hinge member slides a long hole.

  A substantially flat slide surface 22 is provided below the receiving bottom portion 61, and an adjustment piece 63 is disposed on the slide surface 22. The adjustment piece 63 supports the receiving bottom 61 from below. Specifically, the adjustment piece 63 extends in the left-right direction (direction orthogonal to the paper surface), and FIG. 6 shows an end portion on the left side (front side in the drawing) of the adjustment piece 63. . As shown in FIG. 4, when the printer cover 3 is opened, the right end portion of the adjustment piece 63 is exposed at the right side portion in the printer main body 2, and the protruding operation portion 63 b is formed at the right end portion. Is provided. Further, the adjustment piece 63 is attached to the printer main body 2 so as to be rotatable about an axis (not shown) extending in the vertical direction. With the printer cover 3 being opened, the adjustment piece 63 is opened with a pen tip or the like in FIG. When the operation portion 63b is rotated clockwise as indicated by an arcuate arrow, the left end portion of the adjustment piece 63 shown in FIG. 6A slides forward. Note that the operation unit 63b of the adjustment piece 63 may be configured to protrude from the right wall of the printer main body 2, for example. However, processing such as providing an opening for projecting the operation portion 63b in the wall portion of the printer main body 2 is necessary, so that the entire adjustment piece 63 is accommodated in the printer main body 2 as in the present embodiment. Embodiments are more preferred.

  6 (b-1) to 6 (b-3) are diagrams showing stepwise how the left end portion of the adjustment piece 63 is slid to change the rotation angle of the receiving bottom 61. FIG. FIG. 6B-1 shows the receiving bottom 61, the hinge member 62, and the adjustment piece 63 when the ironing portion S is in the initial position before adjustment shown in FIG. 6A. As shown in FIG. 6 (b-1), the receiving bottom 61 has an inclined surface 61a that is inclined downward toward the rear side at the other side. The adjustment piece 63 has a protruding portion 63a bulging in an arc shape on the rear side thereof, and the protruding portion 63a abuts on the inclined surface 61a of the receiving bottom portion 61, thereby supporting the receiving bottom portion 61. Yes.

  As described above, when the operation unit 63b of the adjustment piece 63 shown in FIG. 4 is operated with the pen tip and slightly rotated clockwise, as indicated by a straight arrow in FIG. 6 (b-2), The left end portion of the adjustment piece 63 slides forward, and the receiving bottom 61 slightly rotates clockwise about the hinge member 62 as indicated by an arcuate arrow. When the operation portion 63b of the adjustment piece 63 is further rotated clockwise, as shown by a straight arrow in FIG. 6B-3, the left end portion of the adjustment piece 63 is further slid forward and adjusted. The piece 63 is separated from the receiving bottom 61. Thereby, as shown by the arc-shaped arrow in FIG. 6B-3, the receiving bottom 61 rotates clockwise around the hinge member 62 and contacts the slide surface 22. FIG. 6C shows a state in which the receiving bottom 61 rotates clockwise from the state shown in FIG. 6A and contacts the slide surface 22.

  The main body 51 of the decal member 5 is attached to the installation part 213 by a hinge member (not shown) whose end on the upstream side in the transport direction extends in a direction perpendicular to the paper surface. Thereby, the main body 51 is rotatably provided on the installation part 213. In addition, the main body 51 of the present embodiment is biased toward one side by the spring 513, whereby the shaft 52 having the ironing portion S is also biased toward the one side. An upstream presser portion F1 of the upstream guide member 34 is disposed upstream of the ironing portion S in the transport direction, and a downstream presser portion F2 of the downstream guide member 33 is disposed downstream of the ironing portion S in the transport direction. Is arranged.

  The platen roller 31 and the print head 42 are disposed on the downstream side of the downstream guide member 33 in the transport direction, and the fixed blade 32 and the cutter unit 43 are disposed on the downstream side of the platen roller 31 and the print head 42 in the transport direction. Yes. The cutter unit 43 has a movable blade 431 and reciprocates the movable blade 431 with respect to the fixed blade 32.

  When the paper portion P is conveyed, the paper portion P is squeezed by the ironing portion S while being pressed from one side by the upstream side pressing portion F1 and the downstream side pressing portion F2. Thereby, the curl of the paper portion P can be corrected. In the present embodiment, as described above with reference to FIGS. 6B-1 to 6B-3, the receiving bottom 61 can be rotated clockwise by operating the adjustment piece 63. . Thereby, the position of the spring 513 supported by the receiving bottom 61 moves to the other side, and the position of the ironing portion S also moves to the other side. As a result, the ironing angle α is increased and the correction force can be weakened. In the present embodiment, by operating the adjustment piece 63, the receiving bottom 61 shown in FIG. 6C is slidable from the state where the ironing portion S is in the initial position before adjustment shown in FIG. 6A. The position of the ironing part S can be adjusted up to the state in which it contacts 22. That is, this embodiment is an example of an aspect in which the position of the ironing portion S can be adjusted steplessly. In the present embodiment, the receiving bottom 61, the hinge member 62, and the adjustment piece 63 correspond to the adjustment mechanism 6, and the adjustment mechanism 6 adjusts the position of the ironing portion S together with the position of the spring 513. Here, these members constituting the adjusting mechanism 6 are not particularly limited, and may be integrated and configured as one component. For example, a configuration is adopted in which a lever is provided on the receiving bottom 61 and the receiving bottom 61 itself is moved by operating this lever, and the adjustment piece 63 is omitted, or the receiving bottom 61 has the function of an adjustment piece. You can also. Note that the position of the ironing portion S after the adjustment by the adjustment mechanism 6 and before the start of paper conveyance corresponds to the adjusted initial position.

  Here, the larger the roll diameter of the roll paper R, the greater the tension in the transport direction applied to the paper portion P when transporting the paper portion P, and the smaller the roll diameter of the roll paper R, the paper. The tension in the conveyance direction applied to the portion P is also relatively small. In this embodiment, since the spring 513 that biases the ironing portion S toward one side is provided, when the roll diameter of the roll paper R becomes smaller, the main body 51 is transported when the paper portion P is conveyed. The amount of sinking decreases. As a result, the ironing angle α is reduced, and a relatively strong correction force can be applied to the paper portion P.

  Further, when the paper portion P is transported, the shaft 52 and the main body 51 sink according to the tension in the transport direction applied to the paper portion P, so that the roll paper R is transported when the roll diameter is large or when the transport is initially started. It is possible to reduce the load and to reduce the deterioration and damage of the platen roller 31 and the drive system parts, the load applied to the transport motor, and the like.

  In the embodiment described above, the position of the ironing portion S may be adjusted by manually operating the adjustment piece 63 according to the thickness of the paper and the state of the cut paper portion. For example, when it is necessary to adjust the position of the ironing portion S by looking at the cut paper portion, the printer cover 3 is opened as shown in FIG. 3, and the operation portion 63b of the adjustment piece 63 shown in FIG. Operate with the pen tip. Specifically, when the curl correction is insufficient, the position of the iron part S is adjusted so that the ironing angle α is small, and conversely, the correction force is too strong and the opposite curl is attached. If there is, the position of the ironing portion S may be adjusted so that the ironing angle α is large.

  On the other hand, a mode in which a solenoid or the like is provided to move the adjustment piece 63 electrically instead of manually, or the adjustment piece 63 is omitted, a cam or the like attached to the motor is engaged with the hinge member 62, and the receiving bottom portion is driven by the driving force of the motor. It is good also as a mode which 61 is rotated. Hereinafter, the operation of the printer 1 of the present embodiment will be described by taking as an example a mode in which the adjustment piece 63 is moved by a solenoid (not shown).

  In the printer 1 of the present embodiment, conveyance of the paper portion P, printing on the paper portion P, and the like are controlled by a printer control unit 70 configured with a microcomputer.

  FIG. 7 is a block diagram illustrating a circuit configuration of the printer 1 illustrated in FIG. 3.

  Inside the printer 1 shown in FIG. 3, a printer controller 70 is provided as shown in FIG. A platen control circuit 74, a print head control circuit 75, a cutter control circuit 76, a solenoid control circuit 77, an input device 78, and a humidity sensor 79 are connected to the printer control unit 70, respectively. The printer control unit 70 includes a CPU 71, a RAM 72, and a ROM 73. The ROM 73 includes a platen control program for controlling the platen control circuit 74, a print head control program for controlling the print head control circuit 75, a cutter control program for controlling the cutter control circuit 76, a solenoid control program for controlling the solenoid control circuit 77, and the like. The various programs are stored.

  The ROM 73 stores correspondence data between the combination of the thickness and humidity of the paper and the operation mode of the solenoid. In order to create this correspondence data, first, the ironing angle α corresponding to the combination of the paper thickness and humidity, specifically, the corrective force applied to the paper part under these two conditions is appropriate. The ironing angle α to be obtained is experimentally obtained in advance. Also, the operation mode of the solenoid that adjusts the position of the ironing portion S so as to obtain the ironing angle α is also experimentally obtained in advance. In the correspondence data, the condition combining the sheet thickness and the humidity and the operation mode of the solenoid are determined one-to-one. The correspondence data is set such that, for example, the ironing angle α becomes relatively larger as the paper becomes thinner and the humidity becomes higher. Specifically, the thinner the sheet and the higher the humidity, the larger the solenoid is driven to move the position of the ironing portion S to the other side, so that the ironing force is relatively small. . When the relationship of the ironing angle α corresponding to the combination of the paper thickness and humidity is obtained by a mathematical expression, the ironing angle α may be obtained by calculation based on the paper thickness and humidity.

  The platen control circuit 74 is connected to a conveyance motor (not shown) that rotates the platen roller 31. The print head control circuit 75 is connected to the print head 42 shown in FIG. 6, and the cutter control circuit 76 is connected to the cutter unit 43 shown in FIG. The solenoid control circuit 77 is connected to a solenoid (not shown) that slides the adjustment piece 63.

  The platen control circuit 74 drives the carry motor and rotates the carry motor according to the control of the CPU 71 based on the platen control program. When the transport motor rotates, the platen roller 31 also rotates, so that the paper portion P is transported in the transport direction.

  The print head control circuit 75 causes the print head 42 to perform a printing operation on the paper portion P according to the control of the CPU 71 based on the print head control program. The print head 42 performs printing on the paper portion P that is in contact with the heat generating elements by selectively causing the heat generating elements to generate heat according to the control of the CPU 71.

  The cutter control circuit 76 drives the movable blade 431 of the cutter unit 43 according to the control of the CPU 71 based on the cutter control program. When the movable blade 431 is driven, the paper portion P is cut by the movable blade 431 and the fixed blade 32.

  The solenoid control circuit 77 drives the solenoid according to the control of the CPU 71 based on the solenoid control program. When the solenoid is driven, the adjustment piece 63 slides, and the receiving bottom 61 rotates about the hinge member 62 as an axis. Thereby, the position of the ironing part S moves with the spring 513.

  The input device 78 is for inputting the thickness of the paper. The ROM 73 may store data corresponding to the paper type and the paper thickness, and the input device 78 may select a predetermined paper from a plurality of types of paper.

  The humidity sensor 79 detects the humidity in the printer 1 and is provided, for example, on the side wall portion 212 of the housing portion 21 shown in FIG.

  Next, the operation of the main program performed by the printer control unit 70 shown in FIG. 7 will be described.

  The main program starts when the printer 1 is turned on. First, when the CPU 71 of the printer control unit 70 determines that the paper thickness has been input to the input device 78, the operation determined by the corresponding data based on the paper thickness and the humidity detected by the humidity sensor 79. The solenoid is driven in a manner. As a result, the position of the ironing portion S is adjusted so that the ironing angle α corresponds to the thickness and humidity of the paper.

  Next, when the CPU 71 determines that a print command has been generated, the CPU 71 drives the transport motor to start the rotation of the platen roller 31 and starts printing on the paper portion P by the print head 42. When the platen roller 31 rotates, the paper portion P is transported in the transport direction, and the curl is corrected by being squeezed by the squeezing unit S. The squeezing angle α is adjusted based on the thickness and humidity of the paper, so that curling wrinkles are not sufficiently corrected, and conversely, the correction force is too strong and the opposite curling is suppressed. Can do.

  After the printing by the print head 42 is completed, the CPU 71 stops the conveyance of the paper portion P. Next, the CPU 71 drives the movable blade 431 of the cutter unit 43. Thereby, the paper portion P is cut into a predetermined length.

  In the above embodiment, the ironing angle α is set using two conditions of the thickness as the paper attribute and the humidity as the environmental condition. However, either one of the conditions is used. It is good also as an aspect which sets the ironing angle (alpha), and it is also possible to use other conditions, such as temperature. Furthermore, the conveyance speed of the paper portion calculated from the rotation speed of the conveyance motor may be set as a condition for setting the ironing angle α. Further, the thickness of the paper may be detected by a sensor, or an environmental condition such as humidity may be input from an input device.

  Next, a modification of the printer 1 described so far will be described with reference to FIG. In the following description of the modified example, components having the same names as those of the components described so far will be described with the reference numerals used so far, and redundant descriptions may be omitted.

  FIG. 8 is a diagram for explaining how the position of the ironing portion S is adjusted in the thickness direction of the paper portion P in the modification. FIG. 8 corresponds to FIG. 6, and FIGS. 8A and 8C show a state in which the printer 1 shown in FIGS. 3 and 4 is cross-sectioned in the front-rear direction, and FIG. FIG. 5B-2 shows a state in which the left end portion of the adjustment piece 63 is slid to change the rotation angle of the receiving bottom 61. Moreover, Fig.8 (a) has shown the state which has the ironing part S in the initial position before adjustment similarly to Fig.6 (a).

  As shown in FIG. 8A, in the modification, a rod-like support member 514 is provided instead of the spring 513 shown in FIG. The support member 514 extends from the other surface of the main body 51 of the decal member 5 toward the receiving bottom 61. The support member 514 may be formed integrally with the main body 51 or may be attached to the main body 51. The other end of the support member 514 abuts on the receiving bottom 61, whereby the ironing portion S is supported at the initial position. In this modification, since the support member 514 is provided instead of the spring 513, the main body 51 does not sink even when the paper portion P is conveyed, and the position of the ironing portion S is maintained at the initial position. . That is, the support member 514 supports the ironing portion S while keeping the position of the ironing portion S at the initial position.

  Next, the adjustment mechanism 6 of this modification will be described.

  As shown in FIG. 8 (b-1), the adjustment piece 63 has a V-shaped groove 63c formed on the upper surface thereof, and the other corner 61b of the receiving bottom 61 is locked to the groove 63c. In this state, the receiving bottom 61 is supported by the adjustment piece 63.

  Similarly to the embodiment shown in FIG. 6, when the operation unit 63b of the adjustment piece 63 shown in FIG. 4 is operated with the pen tip and rotated clockwise, it is indicated by a straight arrow in FIG. 8 (b-2). Thus, after the left end portion of the adjustment piece 63 slides forward and the locking between the groove 63c and the corner 61b is released, the receiving bottom 61 is the hinge member 62 as indicated by the arc-shaped arrow. Rotate clockwise about the axis and contact the slide surface 22. Also in this modified example, the receiving bottom 61 can be rotated clockwise by operating the adjustment piece 63. Thereby, in this modification, the position of the ironing part S supported by the support member 514 can be changed in two steps. As a result, the size of the ironing angle α can be changed in two steps, and the correction force can be adjusted in two steps. In this modification, by operating the adjustment piece 63, the ironing portion S shown in FIG. 8A is in the initial position before adjustment, and the receiving bottom portion 61 shown in FIG. One of the states in contact with 22 can be selected and the position of the ironing portion S can be adjusted. That is, this modification is an example of an aspect in which the position of the ironing portion S can be adjusted in two stages. Here, the adjustment of the position of the ironing portion S is not limited to two stages. For example, the position of the ironing portion S may be adjusted to three or more stages by forming a plurality of grooves 63c.

  In this modification, since the support member 514 is used instead of the spring 513 shown in FIG. 6A and the like, the change in the amount of sinking of the main body 51 corresponds to the roll diameter of the roll paper R. It does not have a function to adjust the correction force. Therefore, in the case of a mode in which the receiving bottom 61 is electrically rotated by a solenoid or the like, a mode in which a roll diameter sensor is provided and the angle at which the receiving bottom 61 is rotated in accordance with the roll diameter of the roll paper R is adjusted. Also good.

  As described above, according to the paper transport mechanism 10 and the printer 1 of the present embodiment, the curl of the paper portion P drawn from the roll paper R can be corrected efficiently.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope described in the claims. In the present embodiment, the adjustment mechanism 6 is configured by the receiving bottom portion 61, the hinge member 62, and the adjustment piece 63, but the adjustment mechanism 6 is not limited to these configurations. For example, a support member is constituted by a member that can adjust the length by combining two bars in a nested manner, and rotating both of them relatively, and by adjusting the length of the support member, An embodiment in which the position is adjusted is also a preferred embodiment. In this aspect, the support member corresponds to an example of an adjustment mechanism. In addition, the adjustment mechanism 6 shown in FIGS. 6A and 8A may be provided, or a fixed receiving bottom is employed. You can also. Moreover, it can replace with the support member shown in FIG. 8, and the aspect which provides an air cylinder and a hydraulic cylinder and adjusts the position of the ironing part S with this air cylinder etc. is also employable.

  Further, in the present embodiment, a mode is adopted in which the ironing angle α is increased by moving the ironing portion S from the initial position before adjustment, but on the contrary, the ironing portion S is moved from the initial position before adjustment. Thus, a mode in which the ironing angle α is reduced may be adopted. Furthermore, in the present embodiment, the mode in which the paper portion P is pulled out from the lower side of the roll paper R is described as an example, but a mode in which the paper portion P is pulled out from the upper side of the roll paper R may be adopted. Furthermore, it may be configured such that the ironing angle α can be adjusted to about 180 degrees, and the function of correcting the curl of the paper portion P can be canceled. Specifically, the ironing portion S is moved to a position where the ironing angle α is about 180 degrees by forming the receiving bottom portion 61 shown in FIG. 6 deeply or by forming the support member 514 shown in FIG. 8 short. This can be realized by providing a configuration.

  Even if the configuration requirements are included only in the description of the embodiment and the modification described above, the configuration requirements may be applied to the embodiment and the modification.

DESCRIPTION OF SYMBOLS 10 Paper conveyance mechanism 1 Printer 31 Platen roller 33 Downstream guide member 34 Upstream guide member 5 Decal member 51 Main body part 6 Adjustment mechanism 61 Receiving bottom part 62 Hinge member 63 Adjustment piece 70 Printer control part 77 Solenoid control circuit F1 Upstream side press part F2 Downstream side presser part P Paper part Pi Inner surface Po Outer surface R Roll paper S Ironing part α Ironing angle

Claims (5)

One side of the long sheet is inside and the other side is outside, and is in contact with the other side of the paper part conveyed from the roll paper wound in a roll shape. The ironing part to correct
An upstream presser part that is disposed upstream of the ironing part in the conveying direction of the paper part and presses the paper part from the one side;
A downstream presser part that is disposed downstream of the ironing part in the transport direction and presses the paper part from the one side;
An adjustment mechanism that adjusts the position of the ironing portion in the thickness direction of the sheet portion.   2. The paper transport mechanism according to claim 1, wherein the adjustment mechanism is configured to adjust an initial position which is a position of the ironing portion before the transport of the paper portion is started.   The paper transport mechanism according to claim 1, further comprising a biasing member that biases the ironing portion toward the one side.   4. The paper transport mechanism according to claim 3, wherein the adjustment mechanism adjusts the position of the ironing portion together with the position of the urging member.   3. The paper transport mechanism according to claim 2, further comprising a support member that supports the ironing portion while keeping the position of the ironing portion at the initial position.