JP5534884B2 - Stacker - Google Patents

Description

  The present invention relates to a stacker that stacks single-sheet print-receiving media printed and cut by a printer.

  In a printer that prints on a label or a tag, for example, a label having a predetermined length is temporarily attached on a long belt-like mount (separator) as a print medium (hereinafter also referred to as “paper”) at regular intervals. A continuous label or a strip-shaped sheet for tag production is used. The paper is conveyed by a platen roller, and printing is performed on a label, a tag, or the like using a thermal head provided facing the platen roller.

  Further, a printed sheet is cut at a predetermined interval by using a cutter unit built in the printer. The cut single sheets are fed into a stacker disposed adjacent to the printer and stacked in the printed order. In the following, a case where tags are stacked as single sheets in the stacker will be described.

  The stacker transports the tag newly supplied from the printer to the inside by the transport belt, and inserts the new tag into the lower side of the previously stacked tag. The new tag moves below the previously stacked tags by the frictional force with the conveyor belt, but stops at a predetermined position by coming into contact with the tag stopper. At that time, a tag press unit with a weight such as a weight presses the tag against the conveyance belt so that an appropriate frictional force can be obtained between the tag and the conveyance belt.

  However, when the stacking amount of the tag increases, the weight of the stacked tag is added to the tag to be transported in addition to the weight of the tag press unit, and therefore, between the transported tag and the transport belt. There is a problem in that the frictional force becomes excessively large and the tip of the tag contacting the tag stopper is crushed.

  As a related technique, Patent Document 1 discloses a stacker that can be reliably stacked regardless of the thickness and length of the paper pieces, and that can easily take out the stacked paper pieces. The stacker includes a paper tray that includes a bottom plate and side plates and a stopper that is erected on the bottom plate and limits the depth of the paper piece feeding direction, and a paper conveying means that feeds the paper piece into the paper receptacle along the upper surface of the bottom plate. A stacker that stacks and stacks the pieces of paper that are sequentially fed by the paper transport means with their tips in contact with the stoppers from below, and the stoppers are detachably provided on the bottom plate to attract them both magnetically. As the paper transport means, the transport surface is slightly protruded from the upper surface of the bottom plate and the transport belt is disposed along the transport direction of the paper piece, and the lower end of the stopper does not protrude upward from the transport surface of the transport belt. Protruding pieces extending in parallel with the conveying surface are provided.

  According to the stacker of Patent Document 1, the stopper can be moved arbitrarily along the paper piece conveyance direction, and the depth of the paper receptacle can be accurately adjusted according to the length of the paper pieces to be stacked. By reliably feeding and stacking, and then lifting the stopper from the bottom plate, the stacked paper pieces can be lifted by the protruding pieces to facilitate their removal. However, Patent Document 1 points out a problem that when the amount of stacked paper pieces increases, the frictional force between the paper pieces and the conveyor belt increases, and the leading edge of the paper pieces in contact with the stopper is crushed. In addition, no solution is disclosed.

Japanese Patent Laid-Open No. 5-330720 (1-2, page 4, FIG. 1)

  Accordingly, in view of the above points, the present invention provides a stacker for stacking single-sheet print media printed and cut by a printer, even if the amount of print media to be stacked increases, An object of the present invention is to prevent an increase in the frictional force between the belt and the front end of the print medium that is in contact with the stopper.

In order to solve the above problems, a stacker according to one aspect of the present invention is a stacker for stacking single-sheet print media supplied from the outside, and includes a housing having a bottom surface for stacking the print media, and a bottom surface. A plurality of print media supplied from the outside are sequentially conveyed along the bottom surface, and a conveyance unit that stacks the plurality of print media is disposed on the bottom surface, and is sequentially arranged by the conveyance unit. A stopper for positioning the plurality of print media by contacting the leading ends of the plurality of print media to be conveyed, and movable in a direction substantially perpendicular to the bottom surface. when pressed against the transport unit to the print medium of the plurality of by adding a load, comprising a press section for monotonously decreasing該荷heavy with increasing distance from the bottom surface, the press section A press part main body provided with a press plate for pressing a plurality of stacked print media, and supported by the press part main body so as to be rotatable about a rotation axis that is not parallel to the vertical direction, and different from the rotation axis A guide member having a center of gravity at a position and having a guide groove formed in a part of a peripheral surface for guiding the wire, one end fixed to the guide member, and the other end fixed to the housing. In addition, the rotational moment applied to the guide member over the guide groove of the guide member is converted into the tension between the guide member and the housing, and added to a plurality of stacked print media. And a wire for adjusting the load to be applied .

  According to one aspect of the present invention, when the press unit presses the plurality of print mediums against the transport unit by applying a load to the stacked plural print mediums, the distance from the bottom surface is increased. Accordingly, since the load is monotonously decreased, even if the stack amount of the print medium is increased, an increase in the frictional force between the print medium to be conveyed and the conveyance belt is suppressed, and the load in contact with the stopper is reduced. The leading edge of the print medium can be prevented from being crushed.

It is a schematic sectional drawing which shows the stacker which concerns on one Embodiment of this invention with a printer. It is a perspective view of the stacker shown in FIG. It is a figure which shows the structure of the tag press part in the stacker which concerns on one Embodiment of this invention. It is an assembly drawing of the tag press part shown in FIG. It is a schematic sectional drawing for demonstrating operation | movement of the tag press part shown in FIG. It is a figure for demonstrating the relationship between the rotation angle of a guide member, and the rotational moment which acts on a guide member.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same component and the overlapping description is abbreviate | omitted.
FIG. 1 is a schematic cross-sectional view showing a stacker according to an embodiment of the present invention together with a printer. This stacker is used for stacking single-sheet printing media supplied from the outside. In the following, a case will be described as an example where a strip-shaped sheet for tag production is used as a print medium (paper) and tags printed and cut by a printer are stacked.

  As shown in FIG. 1, in the printer 10, the paper 1 is rotatably supported on a paper supply shaft 13 provided in a housing of the printer 10 as a roll paper 3 wound in a roll shape. The paper 1 pulled out from the paper supply shaft 13 is supplied between the platen roller 11 and the thermal head 12 and is nipped and conveyed by the platen roller 11 and the thermal head 12. At this time, the guide roller 14 guides the paper 1 drawn from the paper supply shaft 13 between the platen roller 11 and the thermal head 12.

  Further, the ink ribbon 2 is stretched between the ribbon supply shaft 15 and the ribbon take-up shaft 16. The ribbon take-up shaft 16 is rotationally driven in conjunction with the platen roller 11. The unused ink ribbon 2 supported while being wound around the ribbon supply shaft 15 is supplied with the paper 1 between the platen roller 11 and the thermal head 12, and the transferred ink ribbon 2 is It is wound up by the ribbon winding shaft 16. At that time, the guide roller 17 guides the unused ink ribbon 2 supported by the ribbon supply shaft 15 between the platen roller 11 and the thermal head 12, and the guide rollers 18 and 19 provide the ink ribbon after transfer. 2 is guided to the ribbon take-up shaft 16.

  The platen roller 11 and the thermal head 12 constitute a printing unit for printing on the paper 1. The platen roller 11 is driven and rotated by a motor provided in the casing of the printer 10 to convey the paper 1 and the ink ribbon 2 in the same direction and at the same speed. The thermal head 12 has a plurality of fine heating elements that generate heat when an electric current flows in the width direction, and is disposed to face the platen roller 11 with the paper 1 and the ink ribbon 2 interposed therebetween. Printing is performed by applying a voltage to these heating elements to cause the heating elements to generate heat by passing a current and transferring the ink on the ink ribbon 2 onto the paper 1.

  A sensor 20 is provided upstream of the printing unit (upstream in the transport direction). The sensor 20 is a light transmission type sensor, and includes a light emitting unit 20a that emits light toward the paper 1, and a light receiving unit 20b that receives light emitted from the light emitting unit 20a. The paper 1 is disposed so as to face the light emitting portion 20a. When the light receiving unit 20b receives the light emitted from the light emitting unit 20a and passing through the hole of the paper 1, the transport position of the paper 1 can be detected. Alternatively, a light reflection type sensor may be used. In that case, position detection marks are provided at regular intervals in the longitudinal direction of the paper 1, and a light emitting unit and a light receiving unit are arranged in parallel so as to detect the position detection marks, and the sheet 1 is subjected to light reflectance. The transport position can be detected.

  A cutter unit 30 is provided at the rear stage of the printing unit (downstream in the transport direction). Under the control of the control unit 50, the cutter unit 30 cuts the paper 1 that has passed the position of the printing unit at a predetermined interval. As a result, the paper 1 is separated into individual tags 4. The separated tags 4 are discharged from the printer 10, sent to a stacker 80 disposed adjacent to the printer 10, and stacked in the printed order.

  The input unit 40 includes a plurality of operation keys and / or an interface connected to an external host computer, and is used to operate the printer 10. The control unit 50 includes, for example, a CPU and software, and controls the operation of each unit of the printer 10. The display unit 60 includes an LCD panel for displaying error messages and the like, and performs various displays based on signals supplied from the control unit 50. The power supply unit 70 supplies power to each unit of the printer 10.

  With the paper 1 and the ink ribbon 2 being sandwiched between the platen roller 11 and the thermal head 12, the motor rotates the platen roller 11, so that the paper 1 and the ink ribbon 2 are upstream in the transport direction (right side in the figure). ) To the downstream side in the transport direction (left side in the figure). The conveyance of the paper 1 and the ink ribbon 2 is controlled by the control unit 50 based on the detection result of the sensor 20. By supplying a print signal to the thermal head 12 while transporting the paper 1 and the ink ribbon 2 in this way, the heating element of the thermal head 12 generates heat and printing on the paper 1 is performed. The printing operation is controlled by the control unit 50 based on the printing information input to the input unit 40.

  The printed paper 1 is cut by a cutter unit 30 provided in the vicinity of the label discharge port, separated into individual tags 4, and discharged to the outside from the label discharge port. The tag 4 discharged from the printer 10 is sent to a stacker 80 disposed adjacent to the printer 10 and inserted below the previously stacked tag.

Next, a stacker according to an embodiment of the present invention will be described in detail.
FIG. 2 is a perspective view of the stacker shown in FIG. Referring to FIGS. 1 and 2, the stacker 80 conveys tags using a casing 81, a plurality of conveying belts 95, and a driving unit 82 that stacks a plurality of tags, and a drive that drives the conveying unit 82. Unit 83, a tag press unit 84 that presses a plurality of stacked tags against the conveyance belt 95 of the conveyance unit 82, a full stack detection unit 85 that detects a full stack state, and a tag stopper 86 that positions the conveyed tag The control unit 100 and the power supply unit 110 are provided.

  The stacker casing 81 has a bottom surface 87 on which a tag is stacked, and a side surface 88 that is brought into contact with and guides one side end in the width direction of the tag. On the bottom surface 87 of the casing 81, a plurality of long holes 89 are formed along the tag transport direction to expose portions of the plurality of transport belts 95 of the transport section 82, respectively. Further, the bottom surface 87 of the casing 81 is inclined so that the downstream side in the transport direction of the tag (left side in the figure) is lower than the upstream side in the transport direction (right side in the figure).

  A guide hole 90 is formed in the side surface 88 of the housing 81 in a direction substantially orthogonal to the bottom surface 87 of the housing 81, and a guide plate that guides the movement of the tag press portion 84 that can move along the guide hole 90. 91 is provided. The guide hole 90 is linearly formed from the lower end close to the bottom surface 87 of the housing 81 to the upper end opposite to the bottom surface 87 of the housing 81. In addition, a groove 90a is formed at the upper end of the guide hole 90 in which a part of the tag press portion 84 is fitted when a number of tags that can be stored in the stacker 80 are stacked.

  The conveyance unit 82 is connected to the motor of the drive unit 83 via a timing belt, and is driven by the motor and rotated. The conveyance roller 92 and conveyance rollers 93 and 94 are provided to be rotatable in parallel with the drive roller 92. And a plurality of conveyor belts 95 wound around the driving roller 92 and the conveying rollers 93 and 94 to propagate the rotational force of the driving roller 92 to the conveying rollers 93 and 94. A part of the plurality of conveyor belts 95 is exposed from the bottom surface 87 of the housing 81.

  Further, a pull-in roller 96 that presses the surface of the tag is provided above the drive roller 92, and the tag can be reliably pulled into the stacker 80 by sandwiching the tag between the transport belt 95 and the pull-in roller 96. it can. The tag drawn into the stacker 80 is inserted into the lower side of the previously stacked tag. In this way, the transport unit 82 stacks the plurality of tags by sequentially transporting the plurality of tags sequentially supplied from the printer 10 along the bottom surface 87 of the housing 81.

  The tag stopper 86 is disposed on the bottom surface 87 of the housing 81 and is brought into contact with the tips of the plurality of tags that are sequentially transported by the transport unit 82 to position the plurality of tags. The tag stopper 86 includes a tag front surface stopper 97 and a tag side surface guide 98 that can be attached to and detached from the tag front surface stopper 97.

  The tag front surface stopper 97 includes a magnet at a bottom position where it abuts on the bottom surface 87 of the housing 81, and is configured to be detachable from the bottom surface 87 which is partially made of a metal plate. Accordingly, the tag front surface stopper 97 can be fixed at an arbitrary position in the tag transport direction according to the length of the tag loaded on the bottom surface 87. Further, a positioning groove 99 is formed on the tag abutting surface of the tag front surface stopper 97, and the convex portion of the tag side surface guide 98 is engaged with the positioning groove 99, so that the tag side surface guide 98 is attached to the tag front surface stopper 97. It can be fixed at an arbitrary position in the width direction.

  The tag press unit 84 is provided with a tag press plate 841 for pressing a plurality of stacked tags. The tag press portion 84 can move in a direction substantially orthogonal to the bottom surface 87 of the housing 81 along the guide hole 90 formed in the side surface 88 of the housing 81, and can load a plurality of stacked tags. Is added to the transport unit 82. Thereby, an appropriate frictional force is obtained between the tag to be conveyed and the conveyor belt 95. The tag press unit 84 also has a role of correcting the curl of the tag curled in the roll direction of the roll paper 3 and corrects the curl to a flat shape by pressing the tag against the bottom surface 87 side of the housing 81. be able to. The tag press unit 84 is lifted by a plurality of tags that are sequentially stacked, and moves obliquely upward along the guide hole 90.

  However, when the stacking amount of the tag increases, the weight of the stacked tag is added to the tag to be transported in addition to the weight of the tag press unit 84, so that the tag to be transported and the transport belt 95 The frictional force between them increases excessively, and the conveying force applied to the tag by the conveying belt 95 increases, causing a problem that the tip of the tag contacting the tag stopper 86 is crushed. Therefore, in the present embodiment, as will be described in detail later, the tag press unit 84 is configured to monotonously reduce the load applied to the plurality of tags as the distance from the bottom surface 87 of the housing 81 increases. It is configured. This suppresses an increase in frictional force between the tag being conveyed and the conveyor belt 95, thereby keeping the conveyance force applied to the tag by the conveyor belt 95 constant, and crushing the tip of the tag that is in contact with the tag stopper 86. Can not be.

  Inside the housing 81, a full stack detection unit 85 that detects a state where no more tags can be stacked on the bottom surface 87 of the housing 81 (full stack state) is disposed near the upper end of the guide hole 90. ing. The full stack detection unit 85 is constituted by, for example, a micro switch, and the micro switch generates a full stack detection signal when a part of the tag press unit 84 contacts the micro switch.

  The control unit 100 controls the operation of the drive unit 83 and stops the motor of the drive unit 83 when receiving the full stack detection signal output from the full stack detection unit 85. The power supply unit 110 supplies power to the drive unit 83 and the control unit 100. With the above configuration, a plurality of tags discharged from the printer 10 can be stacked neatly.

  FIG. 3 is a view showing the structure of the tag press portion in the stacker according to the embodiment of the present invention. 3A is a schematic cross-sectional view of the periphery of the tag press portion as viewed from the side opposite to FIG. 1, and FIG. 3B is an enlarged view of the tag press portion as viewed from the tag insertion port side. It is.

  As shown in FIGS. 3A and 3B, the tag press portion 84 extends along a tag press plate 841 that holds down a plurality of stacked tags and a guide hole 90 formed in the side surface 88 of the housing 81. A movable slider 842, a guide member 843 supported by the shaft portion of the slider 842 so as to be rotatable about a rotation shaft 84a, one end 84b fixed to the guide member 843, and the other fixed to the housing 81 A wire 844 having an end 84c and an E ring 845 fixed to the shaft portion of the slider 842 are included. In the present embodiment, since the rotational moment acting on the guide member 843 is used to adjust the load applied to the plurality of tags, the rotation shaft 84a of the guide member 843 is substantially parallel to the horizontal direction. It is desirable.

  As the wire 844, a metal wire, a synthetic fiber, a carbon fiber thread, or the like can be used. A guide groove 84 d for guiding the wire 844 is formed on a part of the peripheral surface of the guide member 843. Since the guide member 843 has a center of gravity at a position different from the rotation shaft 84a, a rotational moment acts on the guide member 843. Further, as shown in FIG. 3B, a coil spring 846 may be provided around the shaft portion of the slider 842 in the tag press portion 84. In this case, the coil spring 846 biases the guide member 843 with respect to the slider 842 in a predetermined rotation direction (clockwise direction in FIG. 3A), and thereby acts on the guide member 843. Is generated. The wire 844 is bridged over the guide groove 84d of the guide member 843, and the rotational moment acting on the guide member 843 is converted into the tension between the guide member 843 and the housing 81, whereby a plurality of stacked tags are provided. Adjust the applied load.

  FIG. 4 is an assembly view of the tag press section shown in FIG. The tag press plate 841 and the slider 842 are fixed to each other by two set screws with the side surface 88 of the housing 81 shown in FIG. Further, a coil spring 846 and a guide member 843 are mounted around the shaft portion of the slider 842, and the E ring 845 is fixed to a groove 84 e formed in the shaft portion of the slider 842. At that time, one end of the coil spring 846 is inserted into the hole 84 f formed in the slider 842, and the other end of the coil spring 846 is inserted into the hole 84 g formed in the guide member 843. Moreover, the stopper provided in the one end 84b of the wire 844 is hooked on the hook 84h provided in the guide member 843, and the stopper provided in the other end 84c of the wire 844 is shown in FIG. It is fixed to the casing 81.

  FIG. 5 is a schematic cross-sectional view for explaining the operation of the tag press section shown in FIG. FIG. 5A shows a state where the number of stacked tags is small. In this state, the tag press portion 84 is at a low position close to the bottom surface 87 of the housing 81, and the rotation angle of the guide member 843 is small.

  When the conveyance unit 82 conveys a tag that is newly supplied from the printer, a new tag is inserted below the previously stacked tag, and as shown in FIG. Are lifted by stacked tags. Along with this, the wire 844 rotates the guide member 843, so that the rotation angle of the guide member 843 increases.

  Further, when the number of stacked tags is increased, the tag is in a state close to a full stack state as shown in FIG. 5C, and the tag press portion 84 is separated from the bottom surface 87 of the casing 81. By moving to the position, the rotation angle of the guide member 843 further increases.

  FIG. 6 is a diagram for explaining the relationship between the rotation angle of the guide member and the rotational moment acting on the guide member. FIG. 6A shows an initial state where the tag is not yet loaded on the bottom surface of the housing, and FIG. 6B shows a state close to a full stack state.

  The tag press unit 84 applies a downward force in the vertical direction mainly by the gravity acting on the tag press unit main body (the tag press plate 841 and the slider 842 shown in FIG. 3B) and the gravity acting on the guide member 843. receive. In addition, since the guide member 843 has a center of gravity (power point) at a position different from the rotation shaft 84a, a rotation moment due to gravity acts on the guide member 843. Further, when the coil spring 846 is provided in the tag press portion 84, the rotational moment due to the coil spring 846 also acts on the guide member 843.

6A, the rotational moment (torque) T acting clockwise with respect to the guide member 843 in the drawing is represented by the sum of the torque T1 due to gravity and the torque T2 due to the coil spring 846.
T = T1 + T2 (1)

By connecting the guide member 843 and the housing with the wire 844, the torque T acting on the guide member 843 is converted into a tension F between the guide member 843 and the housing. The rotation angle of the guide member 843 with reference to the state (0 °) where the rotation shaft 84a of the guide member 843 and the center of gravity of the guide member 843 are in the horizontal plane is θ, and the rotation shaft 84a (fulcrum) of the guide member 843 at that time ) And a point (action point) between the straight line portion of the wire 844 and the guide groove 84d of the guide member 843 (hereinafter, also simply referred to as “radius”) is r (θ), the guide member 843 The tension F applied to the wire 844 between the housing and the housing is expressed by the following equation (2).
F = T / r (θ) (2)

  As a result, the guide member 843 receives a tension F in the direction of the straight line portion of the wire 844 in addition to the downward force in the vertical direction due to gravity. Therefore, if the radius r (θ) and the range of the rotation angle θ are set so that the tension F monotonously decreases as the rotation angle θ increases, the distance between the tag press portion 84 and the bottom surface of the housing increases. Accordingly, the load applied to the plurality of tags can be monotonously reduced. In the present application, “monotonically decreasing” means that once the value of the function decreases, it does not increase again.

Next, an example of a specific method for setting the radius r (θ) will be described.
First, consider the torque T1 due to gravity. This corresponds to the case where the coil spring 846 does not exist in the tag press portion 84. The force F1 exerted by gravity on the center of gravity of the guide member 843 is represented by the following equation (3), where m is the mass of the guide member 843 and g is the acceleration of gravity.
F1 = mg (3)

When the distance between the rotation shaft 84a (fulcrum) of the guide member 843 and the center of gravity (power point) of the guide member 843 is r1, the torque T1 due to gravity is expressed by the following equation (4) as a function of the rotation angle θ. .
T1 = r1 · F1 cos θ (4)
However, when the rotation angle θ exceeds 90 °, the direction of the torque T1 is reversed.

If T2 = 0 in the equations (1) to (4), the following equation (5) is obtained.
F = r1 · mgcos θ / r (θ) (5)
Therefore, in equation (5), the radius r (θ) may be set so that cos θ / r (θ) decreases as the rotation angle θ increases. For example, the radius r (θ) can be made constant regardless of the rotation angle θ (0 ° ≦ θ ≦ 90 °). In that case, it is desirable to provide a weight at a position away from the center of gravity of the guide member 843.

  However, as shown in FIG. 6B, when the rotation angle θ exceeds 90 °, the guide member 843 rotates by its own weight counterclockwise in the figure, and thereafter, the tension F becomes zero. The load applied to the plurality of tags is constant. In such a case, since the guide member 843 cannot return to the initial state even if the plurality of stacked tags are removed, as shown in FIG. It is good to provide. Thus, when the plurality of stacked tags are removed and the tag press portion 84 returns toward the bottom surface of the housing, the guide member 843 contacts the convex portion 88a and rotates clockwise in the drawing, and the initial state You can return to

In order to generate clockwise torque in the drawing even when the rotation angle θ exceeds 90 °, a coil spring 846 is required. Further, the coil spring 846 can generate a large torque in the guide member 843 without depending on gravity. If the rotational force generated in the coil spring 846 is proportional to the rotation angle of the coil spring 846, the torque T2 by the coil spring 846 is expressed by the following equation (6) as a function of the rotation angle θ of the guide member 843.
T2 = k (θ + θ ₀ ) (6)
Here, k is a constant determined by the coil spring (k> 0), and θ ₀ is a constant that determines the torque of the coil spring 846 in the initial state.

In this case, the following equation (7) is obtained from the equations (1) to (6).
F = r1 · mgcos θ / r (θ) + k (θ + θ ₀ ) / r (θ) (7)
Further, in the case of T1 << T2, the following equation (8) is obtained.
F≈k (θ + θ ₀ ) / r (θ) (8)
Accordingly, in equation (8), the radius r (θ) may be set so that (θ + θ ₀ ) / r (θ) decreases as the rotation angle θ increases. For example, the radius r (θ) is a linear function (aθ + b) of the rotation angle θ (b / a <θ ₀ ), and the radius r (θ) is a quadratic function (aθ ² + bθ + c) of the rotation angle θ. (A> 0).

  In this way, the radius r (θ) of the guide member 843 is set to an angle in the rotational direction so that the tension F of the wire 844 decreases as the distance between the tag press portion 84 and the bottom surface of the housing increases. Set accordingly. That is, if the increase rate of the radius r (θ) accompanying the increase of the rotation angle θ is larger than the increase rate of the torque T, the tension F of the wire 844 becomes weaker as the rotation angle θ increases, and the tag press portion 84 Since the load applied to the tag is also weakened, the increase in the weight of the tag can be offset. As a result, it is possible to suppress an increase in the frictional force between the tag being conveyed and the conveyor belt, and to prevent the tip of the tag contacting the tag stopper from being crushed.

DESCRIPTION OF SYMBOLS 1 Paper 2 Ink ribbon 3 Roll paper 10 Printer 11 Platen roller 12 Thermal head 13 Paper supply axis 14, 17-19 Guide roller 15 Ribbon supply axis 16 Ribbon take-up axis 20 Sensor 20a Light emission part 20b Light receiving part 30 Cutter unit 40 Input part DESCRIPTION OF SYMBOLS 50 Control part 60 Display part 70 Power supply part 80 Stacker 81 Case 82 Conveyance part 83 Drive part 84 Tag press part 841 Tag press board 842 Slider 843 Guide member 844 Wire material 845 E ring 846 Coil spring 84a Rotating shaft 84b, 84c End of wire material 84d Guide groove 84e Slider shaft groove 84f Slider hole 84g Guide member hole 84h Hook 85 Full stack detector 86 Tag stopper 87 Bottom surface 88 Side surface 89 Long hole 90 Guide hole 90a Side groove 91 Guide plate 92 Drive roller 93, 94 Conveying roller 95 Conveying belt 96 Pull-in roller 97 Tag front face stopper 98 Tag side surface guide 99 Positioning groove 100 Control unit 110 Power supply unit

Claims (3)

A stacker for stacking single printed media supplied from outside,
A housing having a bottom surface on which a printing medium is stacked;
A conveying unit that stacks the plurality of print mediums by partially conveying a plurality of print mediums that are partially exposed from the bottom surface and sequentially supplied from the outside along the bottom surface;
A stopper disposed on the bottom surface and positioned in contact with the tips of a plurality of print mediums sequentially conveyed by the conveyance unit;
A distance from the bottom surface that is movable in a direction substantially perpendicular to the bottom surface and presses the plurality of print mediums against the transport unit by applying a load to the plurality of stacked print mediums. A press part that monotonously decreases the load with an increase in
Equipped with,
The press section is
A press unit body provided with a press plate for pressing a plurality of stacked print media; and
It is supported by the press unit main body so as to be rotatable about a rotation axis that is not parallel to the vertical direction, has a center of gravity at a position different from the rotation axis, and a guide groove for guiding the wire is part of the circumferential surface A guide member formed on
The guide member has one end fixed to the guide member and the other end fixed to the housing, and spans the guide groove of the guide member so that a rotational moment acting on the guide member is exerted on the guide member and the housing. A wire rod that adjusts a load applied to a plurality of stacked print media by converting the tension to
Including stacker. The press section, by biasing the guide member in a predetermined rotational direction relative to the press section body, the guide further comprising a coil spring for generating a rotation moment acting on the member, according to claim 1, stacker according. The distance between the rotating shaft and the guide groove in the guide member depends on the angle in the rotation direction so that the tension of the wire decreases as the distance between the press portion and the bottom surface increases. The stacker according to claim 2 , which is set.

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