JP5605116B2 - Recording device - Google Patents

Description

  The present invention relates to a recording apparatus.

  In the recording apparatus, the gap between the recording head and the platen is an important factor that affects the print quality. In order to ensure high print quality, it is necessary to make the gap sufficiently small. On the other hand, if the gap is small, it is difficult to insert a recording medium. In general, a structure including a guide plate for guiding the recording medium between the two is used.

However, if the recording medium is conveyed in a bent state or in an overlapped state, even if a guide plate is provided, it may be difficult to insert the recording medium into the gap, and the recording medium may be clogged (so-called jam). .
Patent Document 1 below discloses a dot impact type printing apparatus as a recording apparatus. This printing apparatus rotatably supports a platen having a surface that is close to and spaced from the recording head, and when the recording head is in operation, the adjacent surface is directed toward the recording head to narrow the conveyance path of the recording medium. On the other hand, a configuration is disclosed in which the separation path is directed toward the recording head when the recording medium passes to widen the conveyance path of the recording medium.

JP 11-291572 A

  However, the above prior art is effective as a jam removing means, but has a problem that a complicated mechanism is required to rotationally drive the platen.

  SUMMARY An advantage of some aspects of the invention is that it provides a recording apparatus capable of removing a jam without requiring a complicated mechanism.

In order to solve the above problems, the present invention provides a recording apparatus including a guide plate that guides a recording medium to be conveyed between a recording head and a platen, and the guide plate is spaced from the platen. A guide member for opening the recording medium and biasing the guide plate toward the platen and a direction in which the guide plate is resisted to the bias so that the interval is equal to or greater than a predetermined value. A guide plate holding mechanism that holds the guide plate in a displaceable manner; and a guide plate displacement amount limiting member that limits a displacement amount of the guide plate in a direction against the biasing to a range in which the guide plate can be elastically deformed. The configuration is adopted.
According to the present invention, there is provided a recording apparatus including a guide plate for guiding a recording medium to be conveyed between a recording head and a platen, wherein the guide plate is spaced from the platen. A guide surface having a guide surface, and a biasing member that biases the guide plate toward the platen; and the guide plate is displaced in a direction against the bias so that the interval is equal to or greater than a predetermined value. The structure which has a guide plate holding | maintenance mechanism hold | maintained possible is employ | adopted.
By adopting such a configuration, the present invention is configured such that the guide plate is displaced so that the distance between the guide surface and the platen is larger than a predetermined value against the bias of the biasing member. Remove. In addition, after the jam is removed, the guide plate returns to the biased direction, and the distance between the guide surface and the platen is maintained at a predetermined value.

Further, in the present invention, the guide plate holding mechanism is engaged with a hook member integrally provided on the opposite side to the guide surface side of the guide plate, and movement of the hook member in the biasing direction. The structure which has the latching member which stops and regulates is employ | adopted.
By adopting such a configuration, in the present invention, the movement of the hook member in the urging direction is restricted by the locking member, so that the distance between the guide surface and the platen is prevented from being less than a predetermined value. can do.

In the present invention, a configuration is adopted in which the hook member and the locking member are respectively provided on the upstream side and the downstream side of the recording head in the conveyance direction of the recording medium.
By adopting such a configuration, in the present invention, the guide plate can be displaced in the direction against the urging on the upstream side and the downstream side of the recording head, so that the jam can be easily removed.

In the present invention, a configuration is adopted in which a guide plate displacement amount limiting member that limits the displacement amount of the guide plate in the direction against the bias to a second predetermined value or less is employed.
By adopting such a configuration, in the present invention, by restricting the amount of displacement of the guide plate in the direction against the urging to the second predetermined value or less, an excessive load is applied to the guide plate at the time of jam removal. You can avoid it.

In the present invention, a configuration is adopted in which the second predetermined value is set to a displacement amount within a range in which the guide plate can be elastically deformed.
By adopting such a configuration, in the present invention, the amount of displacement of the guide plate is kept in the elastic region, the plastic deformation of the guide plate is prevented, and after removing the jam, the guide plate is added to the biasing force of the biasing member. With this spring force, it is possible to return to a predetermined value interval.

1 is a schematic configuration diagram illustrating a printer according to an embodiment of the present invention. It is the figure which looked at the back surface printing part in embodiment of this invention from the conveyance direction upstream. It is a top view which shows the guide plate with which the back surface printing part in embodiment of this invention is provided. It is the schematic which shows the guide plate holding | maintenance mechanism in embodiment of this invention. It is a figure for demonstrating the effect | action of the guide plate holding | maintenance mechanism in embodiment of this invention.

Hereinafter, an embodiment of a recording apparatus according to the present invention will be described with reference to the drawings. In the drawings used in the following description, an XYZ orthogonal coordinate system is set, and the positional relationship of each member may be described with reference to the XYZ orthogonal coordinate system. Here, the predetermined direction in the horizontal plane is the X-axis direction (width direction), the direction orthogonal to the X-axis direction in the horizontal plane is the direction orthogonal to the Y-axis direction (conveying direction), the X-axis direction, and the Y-axis direction ( (Vertical direction) is defined as the Z-axis direction.
In the present embodiment, a composite printer (hereinafter simply referred to as a printer) having both an ink jet head and a dod impact head is exemplified as a recording apparatus.

FIG. 1 is a schematic configuration diagram illustrating a printer 11 according to an embodiment of the present invention.
The printer 11 prints images, characters, and the like by ejecting ink from the inkjet head 31 onto a long paper (recording medium) P that is extended from a roll paper (roll body) RP wound in a roll shape. It has a configuration. The printer 11 includes a transport unit 20 that transports the paper P extended from the roll paper RP, a recording unit 30 that performs printing on the paper P, a cutting unit 40 that cuts the paper P that has undergone printing into a predetermined size, A back side printing unit 50 that performs printing on the back side of the cut paper Ps.

  The printer 11 includes a case 12 that accommodates the roll paper RP, and a main body case 13 that accommodates the transport unit 20, the recording unit 30, the cutting unit 40, the back surface printing unit 50, and the like. A paper discharge tray 17 is provided on the front side (+ Y side) of the main body case 13 for discharging the paper Ps that has been printed and cut. Further, a container 14 (hereinafter referred to as a “scrap container”) 15 that receives and accumulates the cut pieces Pk generated by cutting the paper P is formed on the right side surface of the main body case 13 so as to be slightly recessed from the surface. It is arranged in the inside. In this embodiment, the chip container 15 can be pulled out from the main body case 13 in the direction (X-axis direction) orthogonal to the transport direction (Y-axis direction), and the end surface in the orthogonal direction is exposed in the recess 14. In addition, a handle 16 for pulling out the chip container 15 is provided at the end face.

  Hereinafter, each component provided in the printer 11 will be described in accordance with the conveyance order of the sheets P conveyed by a plurality of roller pairs functioning as the conveyance unit 20 provided in the printer 11. The transport unit 20 includes a paper feed roller pair 21, transport roller pairs 22, 23, 24, 25 and a paper discharge roller pair 26. First, the paper P unrolled from the roll paper RP is fed to the recording unit 30 by the paper feed roller pair 21. The recording unit 30 includes an ink jet head 31 that ejects ink and a support base 32 that supports the paper P.

  In the recording unit 30, the paper P fed from the roll paper RP is conveyed, and an image or the like is printed on the upper surface (front surface) of the paper P. First, the paper P is sent out between the inkjet head 31 and the support base 32 by the transport roller pair 22. The upper surface (front surface) of the fed paper P is conveyed at a predetermined distance from the ink jet head 31. At this time, ink is ejected from the ink jet head 31 onto the upper surface of the paper P to perform printing. Thereafter, the paper P is transported to the cutting unit 40 by the transport roller pair 23.

  The cutting unit 40 has a cutter 41 constituted by a rotary blade or the like as a functional component, and cuts the paper P for each region corresponding to a printed image or the like. At this time, the cutting unit 40 cuts the printed area so as to remove an unnecessary area existing at the end in the transport direction. For this reason, as shown in the drawing, the sheet P is cut to generate a cut piece Pk, and the generated cut piece Pk falls in the direction of gravity. Therefore, the chip container 15 is disposed below the cutting portion 40 in order to receive and collect the falling cut pieces Pk.

  The cut paper Ps is then conveyed to the back surface printing unit 50 that prints characters on the back surface. The back side printing unit 50 includes a so-called dot impact type printing unit 51 that presses an ink ribbon against the lower surface (back side) of the paper Ps to form ink dots, a support base 52 that supports the paper Ps from the upper side during printing, have. In the back surface printing unit 50, the paper Ps to be transported is first sent out between the printing unit 51 and the support base 52 by the transport roller pair 24. The sent paper Ps is printed with dots on the lower surface (rear surface) of the paper Ps by the printing unit 51, and is sent in the transport direction by the transport roller pair 25.

  Thereafter, the paper Ps is conveyed to, for example, a drying unit (not shown), dried by a heater unit (not shown) as a functional component, and finally discharged by the paper discharge roller pair 26. The paper is discharged to the paper tray 17.

Next, the configuration of the back surface printing unit 50 of the present embodiment will be described in detail.
FIG. 2 is a view of the back surface printing unit 50 according to the embodiment of the present invention as viewed from the upstream side in the transport direction. FIG. 3 is a plan view showing a guide plate 70 provided in the back surface printing unit 50 according to the embodiment of the present invention.

  As shown in FIG. 2, the support base 52 includes a platen 60 that receives an impact during printing, and a beam member 61 that supports the platen 60 at a predetermined height. Two platens 60 of the present embodiment are provided. The platen 60 has a cylindrical shape, and a circular bottom surface facing the −Z side is a striking surface 60a. Both ends of the beam member 61 are fastened to both ends of a guide plate 70 provided on the printing unit 51 side by screw members 62.

  The print unit 51 includes a print head (recording head) 53 that faces the platen 60 in the Z-axis direction. The printing unit 51 of this embodiment has two print heads 53. The print head 53 includes a cartridge 55 that accommodates an ink ribbon 54 (see FIG. 3). On the back side of the ink ribbon 54 shown in FIG. 3, unillustrated head pins for driving a plurality of dods are arranged. The print unit 51 includes a unit base 56 (see FIG. 2) on which two print heads 53 are mounted.

  The unit base 56 is supported by a link mechanism (not shown) and is movable in the Z-axis direction. The printing unit 51 includes a biasing member (not shown in FIG. 2 and indicated by reference numeral 57 in FIGS. 4 and 5 to be described later) for biasing the unit base 56 upward, and the guide plate 70 by the biasing. A contact member 58 that contacts the back surface 70b opposite to the guide surface 70a and positions the print unit 51 with respect to the guide plate 70 in the Z-axis direction is provided.

  The contact member 58 has a substantially concave shape, and is configured to contact the back surface 70b of the guide plate 70 at two points with an interval in the X-axis direction. The printing unit 51 includes the contact member 58 on each of the upstream side and the downstream side in the transport direction. Therefore, the printing unit 51 is configured to contact the guide plate 70 at four points. In addition, the code | symbol F1 shown in FIG.

  As illustrated in FIG. 3, the guide plate 70 includes an opening 71 that exposes the print head 53, an opening 72 in which a lower roller (−Z side) of the transport roller pair 24 is disposed, and the transport roller pair 25. And a comb-like recess 73 in which a lower (−Z side) roller is disposed. The guide plate 70 has holes 74 at both ends in the width direction, and is configured to be fixed to the main body case 13 of the printer 11 at both ends. The guide plate 70 of the present embodiment is formed of a metal member such as SUS304 having a thickness of 1.2 mm, for example. Further, the guide plate 70 is configured to reduce bending in the vertical direction and to reduce the vertical moment of inertia in order to facilitate displacement in the vertical direction (Z-axis direction) described later.

As shown in FIG. 2, the guide plate 70 has a guide surface 70 a that guides the paper Ps at a distance from the platen 60. And the back surface printing part 50 has the guide plate holding | maintenance mechanism 80 which hold | maintains the guide plate 70 so that a displacement in the direction resisting urging | biasing is possible so that the said space | interval may become a predetermined value or more.
Subsequently, the configuration of the guide plate holding mechanism 80 of the present embodiment will be described with reference to FIGS. 4 and 5 additionally.
FIG. 4 is a schematic view showing the guide plate holding mechanism 80 in the embodiment of the present invention. FIG. 5 is a view for explaining the operation of the guide plate holding mechanism 80 in the embodiment of the present invention. 4 and 5, only the contact member 58 is illustrated and the printing unit 51 is not illustrated in order to improve the visibility.

  As shown in FIG. 4, the guide plate holding mechanism 80 is displaced in a direction (−Z direction) that resists urging so that the distance between the platen 60 and the guide surface 70 a is equal to or greater than a predetermined value A. It is configured to hold as possible. The predetermined value A allows the paper Ps to pass between the striking surface 60a of the platen 60 and the guide surface 70a of the guide plate 70, and ink dots can be formed on the lower surface (back surface) of the paper Ps. The optimum interval (gap) is set.

  The guide plate holding mechanism 80 locks the movement of the hook member 81 integrally provided on the opposite side to the guide surface 70a side of the guide plate 70 and the movement of the hook member 81 in the biasing direction of the biasing member 57. And a locking member 82 for restricting. The hook member 81 of this embodiment is formed by raising a part of the guide plate 70. The locking member 82 includes a groove portion 83 into which the hook member 81 is inserted, and a locking surface 82 a that locks the hook member 81 on the back side (−Z side) of the groove portion 83. The locking member 82 is configured to be fixed to the main body case 13 of the printer 11 independently of the guide plate 70 and the printing unit 51.

  The hook member 81 is normally pressed against the locking member 82 by the urging force of the urging member 57. That is, the urging member 57 urges the guide plate 70 toward the platen 60 via the contact member 58 while supporting the weight of the printing unit 51, and presses the hook member 81 against the locking member 82. Has power. The hook member 81 and the locking member 82 have a positional relationship for holding the predetermined value A in the pressed state.

  As shown in FIG. 3, the hook member 81 and the locking member 82 are respectively provided on the upstream side (−Y side) and the downstream side (+ Y side) of the print head 53 in the transport direction of the paper Ps. Further, the upstream and downstream hook members 81 and locking members 82 of the present embodiment have a positional relationship in which the action point F2 where the resultant force of the urging force at the contact position F1 of the contact member 58 acts is sandwiched in the transport direction. Have The action point F2 is a position at which the diagonal line of the contact position F1 intersects, and is a position corresponding to the central portion of the guide plate 70.

  In this embodiment, as shown in FIGS. 4 and 5, a guide plate displacement amount limiting member 84 that limits the displacement amount of the guide plate 70 in the direction resisting the bias to a second predetermined value B or less is provided. The guide plate displacement amount limiting member 84 of this embodiment is formed integrally with the locking member 82. The guide plate displacement amount limiting member 84 is bent at both ends in the width direction (X-axis direction) of the locking member 82 and is provided to extend vertically upward by a predetermined distance.

  As shown in FIG. 4, the guide plate displacement amount limiting member 84 has a positional relationship in which the guide plate displacement amount limiting member is separated from the back surface 70 b of the guide plate 70 in a normal state. Then, the guide plate displacement amount limiting member 84 is configured to abut against the back surface 70b when the guide plate 70 is displaced in the −Z direction and to restrict deformation larger than the second predetermined value B ( (See FIG. 5). The second predetermined value B is set to a displacement amount within a range in which the guide plate 70 can be elastically deformed.

Next, a jam removal operation in the back surface printing unit 50 of the printer 11 having the above configuration will be described.
When the sheet Ps is conveyed in a bent state, the sheet Ps is sandwiched between the platen 60 and the guide surface 70a that are kept at a predetermined value A, and a jam (paper jam) occurs.

  First, the user displaces the guide plate 70 in the −Z direction so that the distance between the guide surface 70 a and the platen 60 is larger than the predetermined value A against the urging of the urging member 57. At this time, the pressing of the hook member 81 against the locking member 82 is released, and the hook member 81 moves in the −Z direction integrally with the guide plate 70. Further, the contact member 58 (printing unit 51) also moves integrally in the −Z direction while maintaining the contact state with the guide plate 70.

  In this embodiment, since there is no constraint in the -Z direction at the center of the guide plate 70, displacement in the direction in which the transport path of the paper Ps widens is possible, and jams can be removed. In the present embodiment, the hook member 81 and the locking member 82 are provided on the upstream side and the downstream side of the print head 53 in the conveyance direction of the paper Ps. Thus, the guide plate 70 can be displaced, and the jam can be easily removed.

  As shown in FIG. 5, when the guide plate 70 is displaced to some extent, the back surface 70b comes into contact with the guide plate displacement amount limiting member 84 and the displacement is restricted. In the present embodiment, the guide plate displacement amount limiting member 84 limits the amount of displacement of the guide plate 70 in the direction resisting urging to the second predetermined value B or less, so that the guide plate 70 is excessively large during jam removal. Can be avoided.

  After the user removes the jam, the guide plate 70 returns to the biased direction (+ Z direction). Further, in the present embodiment, the guide plate displacement amount limiting member 84 limits the displacement amount of the guide plate 70 to the second predetermined value B or less, so that the displacement amount of the guide plate 70 is maintained in the elastic region, and the guide plate 70 The plastic deformation of 70 can be prevented, and after the jam is removed, it can be returned to the position shown in FIG. 4 by the spring force of the guide plate 70 in addition to the biasing force of the biasing member 57.

  The hook member 81 moves in the + Z direction integrally with the guide plate 70. Further, the abutting member 58 (printing unit 51) also moves integrally in the + Z direction while maintaining the abutting state with the guide plate 70. The distance between the guide surface 70a and the platen 60 is maintained at a predetermined value A by the hook member 81 being locked to the locking member 82 and the movement being restricted. For this reason, displacement in the direction in which the conveyance path of the paper Ps is narrowed is prevented, and printing in a state where the predetermined value A is held is possible while ensuring stable paper feeding.

Therefore, according to the above-described embodiment, the printer 11 includes the guide plate 70 that guides the conveyed paper Ps between the print head 53 and the platen 60, and the guide plate 70 is spaced from the platen 60. The guide plate 70 has a guide surface 70a for guiding the paper Ps with a gap, and a biasing member 57 for biasing the guide plate 70 toward the platen 60, and the guide plate 70 so that the interval is equal to or greater than a predetermined value A. By adopting a configuration that includes a guide plate holding mechanism 80 that holds the guide plate 70 so as to be displaceable in a direction against the biasing, the guide plate 70 resists the biasing of the biasing member 57, and the guide surface 70a. The jam is removed by displacing the gap with the platen 60 so as to be larger than the predetermined value A. In addition, after removing the jam, the guide plate 70 can be returned to the biased direction, and the distance between the guide surface 70a and the platen 60 can be maintained at the predetermined value A.
Therefore, in this embodiment, it is possible to remove the jam without requiring a complicated mechanism.

  As mentioned above, although preferred embodiment of this invention was described referring drawings, this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  For example, in the above embodiment, the case where the present invention is applied to the dot impact type back surface printing unit 50 is illustrated, but the present invention may be applied to the ink jet type recording unit 30.

  In the above-described embodiment, the case where the recording apparatus is the printer 11 has been described as an example. However, the recording apparatus is not limited to the printer, and may be an apparatus such as a copying machine or a facsimile.

  Further, as the recording apparatus, a recording apparatus that ejects or discharges liquid other than ink may be employed. The present invention can be applied to various recording apparatuses including a recording head that discharges a minute amount of liquid droplets. The droplet means a state of the liquid ejected from the recording apparatus, and includes a liquid having a granular shape, a tear shape, or a thread shape. The liquid here may be any material that can be ejected by the recording apparatus. For example, it may be in a state in which the substance is in a liquid phase, such as a liquid with high or low viscosity, sol, gel water, other inorganic solvents, organic solvents, solutions, liquid resins, liquid metals (metal melts ) And a liquid as one state of a substance, as well as a material in which particles of a functional material made of a solid such as a pigment or metal particles are dissolved, dispersed or mixed in a solvent. A typical example of the liquid is ink as described in the above embodiment. Here, the ink includes general water-based inks and oil-based inks, and various liquid compositions such as gel inks and hot melt inks. Further, a specific example of the recording apparatus is not limited to an apparatus including a container (case 12) having a roll paper in which a paper sheet is wound in a roll shape as described in the above embodiment. For example, any apparatus provided with a container in which a long recording medium such as a flexible substrate, a metal plate, a plastic sheet, or a cloth is wound in a roll shape is used as a recording apparatus. Can be adopted. Furthermore, the long recording medium provided in the container does not necessarily have to be wound in a roll shape, for example, in a twisted manner.

  DESCRIPTION OF SYMBOLS 11 ... Printer (recording device), 53 ... Print head (recording head), 57 ... Biasing member, 58 ... Contact member, 60 ... Platen, 70 ... Guide plate, 70a ... Guide surface, 80 ... Guide plate holding mechanism, 81: hook member, 82: locking member, A: predetermined value, B: second predetermined value, Ps: paper (recording medium)

Claims (3)

A recording apparatus comprising a guide plate for guiding a recording medium to be conveyed between a recording head and a platen,
The guide plate is to the draft of the recording medium with the platen and spacing,
A biasing member that biases the guide plate toward the platen;
A guide plate holding mechanism that holds the guide plate so as to be displaceable in a direction against the urging so that the interval is equal to or greater than a predetermined value;
A recording apparatus , comprising: a guide plate displacement amount limiting member that limits a displacement amount of the guide plate in a direction against the bias within a range in which the guide plate can be elastically deformed . The guide plate holding mechanism is
A hook member integrally provided on a side opposite to the guide surface side for guiding the recording medium of the guide plate;
The recording apparatus according to claim 1, further comprising: a locking member that locks and restricts movement of the hook member in the biasing direction.   The recording apparatus according to claim 2, wherein the hook member and the locking member are respectively provided on the upstream side and the downstream side of the recording head in the conveyance direction of the recording medium.

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