JP2006056050A - Printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printer capable of easily adjusting a gap between a dot head and a platen head, through which printing paper passes. <P>SOLUTION: This printer is equipped with a dot head which is equipped with a printing wire, a platen head which is arranged in an opposed manner at a predetermined interval between the dot head and the platen head, and an operating device for operating the printing wire. The printer for printing various kinds of pieces of information on the backside of a print created by a printing processor is characterized as follows: the dot head and the operating device are constituted as one unit; the printing unit is fixed to the machine body side of the print processor; the platen head is mounted on the machine body side via a positioning mechanism; and the positioning mechanism comprises a platen head holder for holding the platen head, and an operation body for making the platen head holder screw-advance/screw-recede with respect to the dot head, so that the gap between the platen head and the dot head can be adjusted by making the platen head holder screw-advance/screw-recede with respect to the dot head through the rotational operation of the operation body. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

    The present invention relates to a printing apparatus that is mounted mainly on an ink jet print processing apparatus used for printing an image or the like on a printing paper and prints various information on the back surface of the printing paper.

  For example, an ink jet print processing apparatus is mounted on a carriage and moves in the main scanning direction, a transport apparatus that conveys printing paper in the sub-scanning direction, and prints various information such as an order number on the back side of the printing paper. The printing device etc. is installed, and based on the image data, the ink droplets are ejected from the ejection nozzles of the print head, so that the image is printed on the surface of the printing paper and the order number is printed on the back surface of the printing paper by the printing device. Etc. are printed.

  Further, the printing apparatus mounted on the above-described print processing apparatus includes a dot head provided with a printing wire, a platen head that is arranged to be opposed to the dot head at a predetermined interval, a ribbon cassette loaded with a ribbon, An operating device that operates the printing wire is provided, and the platen head is fixed to the paper transport unit on the machine body, while the dot head, ribbon cassette, and operating device are separately configured into a single unit built into the case. The four corners of the unit are respectively bolted to the paper transport unit so that the dot head faces the platen head with a predetermined gap.

In this printing apparatus, printing is performed on the back surface of the printing paper passing through the gap between the dot head and the platen head through the ribbon soaked with ink by the operation of the printing wire by the driving mechanism. (See Patent Document 1)
JP-A-2004-25695

  By the way, in the above printing apparatus, in order to properly adjust the interval between the dot head and the platen head through which the printing paper passes, conventionally, by adjusting the tightening amount of each bolt that stops the four corners of the printing unit, The mounting position of the printing unit with respect to the transport unit is adjusted to properly adjust the distance between the dot head and the platen head. However, in the above adjustment method, it is necessary to operate a plurality of bolts. Depending on how the bolts are operated, there are problems such as the tilting of the dot head relative to the platen head, and the overall adjustment work is very difficult, making it difficult to achieve the accuracy of the distance between the dot head and the platen head. There is.

  The present invention has been developed in view of the above circumstances, and an object of the present invention is to provide a printing apparatus capable of easily adjusting a gap between a dot head through which a printing paper passes and a platen head. It is in.

  In order to achieve the above object, the invention according to claim 1 operates a dot head provided with a printing wire, a platen head arranged opposite to the dot head at a predetermined interval, and a printing wire. In a printing apparatus provided with an operation device for printing various information on the back side of a print created by the print processing apparatus, a printing unit including a dot head is fixed to the machine body side of the print processing apparatus, while a platen head Is attached to the machine body via a position adjustment mechanism, and adjusts the gap between the platen head and the dot head by adjusting the position of the platen head by the position adjustment mechanism. It is.

  In the invention according to claim 2, the position adjusting mechanism is configured by a platen head holder for holding the platen head, and an operating body for screwing or unscrewing the platen head holder with respect to the dot head, The gap between the platen head and the dot head is adjusted by screwing or unscrewing the platen head holder with respect to the dot head by rotating the operating body.

  The invention described in claim 3 is characterized in that a slack regulating body for preventing slack of the operating body is provided.

  According to the first aspect of the present invention, the dot head and the platen head through which the print paper passes can be obtained by adjusting the position of the platen head by the position adjusting mechanism without adjusting the mounting posture of the printing unit with respect to the machine body. The gap between the two can be easily adjusted.

  According to the second aspect of the present invention, since the gap between the dot head and the platen head can be adjusted only by rotating the operating body, the aforementioned gap can be adjusted more easily. It has come to be possible.

  According to the invention described in claim 3, the gap between the adjusted platen head and the dot head is not inadvertently changed by the slack regulating body.

  An ink jet print processing apparatus denoted by reference numeral 1 in FIG. 1 includes an ink jet print unit 2 in a box-shaped housing 10 and a cutter unit 3 for cutting the print paper P that has been printed by the print unit 2. The transport unit 4 for transporting the print paper P printed by the print unit 2 toward the cutter unit 3, and the print paper P cut by the cutter unit 3 are carried out onto a tray 11 provided on the upper surface of the housing 10. A carry-out unit 5 comprising a pair of carry-out rollers for carrying out is mounted.

  The ink jet print unit 2 is mounted on a carriage 21 and includes a print head 22 that reciprocates in a main scanning direction (a direction orthogonal to the conveyance direction of the print paper P), a suction fan 23, and a conveyance table 24. The print head 22 reciprocates in the main scanning direction via the carriage 21 and discharges ink via the discharge nozzles onto the transported print paper P to print a desired image. Yes.

  The suction fan 23 is disposed at a position facing the print head 22 across the transport path of the print paper P, and the suction fan 23 is driven so that the print paper P on the transport base 24 is sucked onto the transport base 24. I have to.

  The cutter unit 3 includes a movable blade 31 and a fixed blade 32 disposed so as to face the movable blade 31 with the print paper P interposed therebetween.

  In the transport unit 4, a plurality of transport roller pairs 41 are incorporated in a box-shaped case 40, and the print paper P is transported through the transport roller pairs 41. In the embodiment shown in the figure, A printing device 6 according to the present invention is mounted on the transport unit 4.

  The printing apparatus 6 of the embodiment shown in the figure is of a so-called dot impact type, and is basically arranged in a confronting manner with a dot head 61 provided with a printing wire and a predetermined distance from the dot head 61. A platen head 62, a ribbon cassette 63 loaded with a ribbon, and an operating device 64 for operating the printing wire of the dot head 61.

  The dot head 61, the ribbon cassette 63, and the operating device 64 are incorporated in a case 65 to form a printing unit 66. The printing unit 66 is attached to a holder member 42 provided on the lower surface side of the paper transport unit 4. It is fixed via a screw member 67.

  On the other hand, a platen head 62 disposed opposite to the dot head 61 of the printing unit 66 at a predetermined interval is attached to the transport unit 4 via the position adjusting mechanism 7, and the position of the platen head 62 by the position adjusting mechanism 7 is set. By adjusting, the gap between the platen head 62 and the dot head 61 is adjusted.

  The position adjusting mechanism 7 includes a cylindrical holding cylinder 71b having a female screw 71a provided on the inner periphery thereof, and a ring for holding the base member 71 bolted to the case 40 of the transport unit 4 and the platen head 62. Plate-shaped platen head holder 72, operating body 73 for screwing or unscrewing platen head holder 72 with respect to dot head 61, and loosening restricting body 74 for preventing loosening of operating body 73. ing.

  The platen head holder 72 is provided with a male screw 72a around the outer periphery thereof, and a lower end portion of the inner periphery thereof is provided with a stepped portion 72b that engages with a flange 62a provided on the outer periphery of the platen head 62. The edge is provided with a plurality of fitting grooves 72c into which protrusions 73c described later can be fitted.

  The operating body 73 includes a rod-shaped operating shaft portion 73a, a pinion receiving portion 73b provided at the lower end of the operating shaft portion 73a, and a plurality of protruding portions 73c protruding outward from the outer periphery of the spring receiving portion 73b. A male screw 73d is provided around the outer periphery of the operation shaft portion 73a, and a fitting groove 73e into which a tool screwdriver can be fitted is provided at the upper end of the operation shaft portion 73a.

  The slack regulating body 74 includes a nut portion 74a having a hexagonal outer periphery and a ring portion 74b having a diameter that is slightly larger than the outer diameter of the nut portion 74a. A female screw 74c that can be screwed into the male screw 73a is provided around the outer periphery of the ring portion 74b. A male screw 74d that can be screwed into the female screw 71a of the base member 71 is provided around the outer periphery of the ring portion 74b.

  The position adjusting mechanism 7 described above is configured such that the platen head holder 72 is screwed into the cylindrical holding cylinder 71 b of the base member 71 bolted to the paper transport unit 4, and the platen head 62 is inserted into the platen head holder 72. After loading and setting the coil spring 75 on the platen head 62, the operating body 73 is screwed into the cylindrical holding cylinder 71b, and the projection 73c of the operating body 73 is fitted into the fitting groove of the platen head holder 72. The coil spring 76 is fitted to the outer periphery of the operation shaft portion 73a, and then the slack regulating body 74 is screwed into the cylindrical holding cylinder 71b.

  Next, in order to adjust the gap S between the dot head 61 and the platen head 62 by the above printing device 6, the tip of the minus driver is fitted into the fitting groove 73d of the operating body 73, and the minus driver is Accordingly, the operating body 73 is screwed or loosened, and accordingly, the platen head holder 72 is also screwed or loosened with respect to the base member 71, and the platen head holder 72 is moved to the platen head holder 72 by the spring force of the coil spring 75. The pressed platen head 62 is close to or away from the dot head 61, and the gap S between the dot head 61 and the platen head 62 can be adjusted.

  When the clearance S between the dot head 61 and the platen head 62 has been adjusted, the lower end of the slack regulating body 74 comes into contact with the upper surface of the spring receiving portion 73 of the operating body 73 as shown in FIG. Since the operating body 73 and the platen head holder 72 are not unintentionally loosened, the clearance between the adjusted dot head 61 and the platen head 62 is screwed. S does not inadvertently go mad.

  In the above embodiment, the printing apparatus 6 of the present invention is mounted on an ink jet type print processing apparatus. However, the present invention is not limited to this. For example, the printing apparatus 6 of the present invention is mounted on a laser type print processing apparatus. May be.

1 is a schematic perspective view of an ink jet print processing apparatus equipped with a printing apparatus of the present invention. 1 is a schematic configuration diagram of an ink jet print processing apparatus equipped with a printing apparatus of the present invention. FIG. 3 is a schematic perspective view of a transport unit in which the printing apparatus of the present invention is incorporated. Sectional drawing of the principal part. The expanded sectional view of the principal part. The top view which shows the state which set the operation body to the platen head holder which comprises a position adjustment mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Print processing apparatus 4 Conveyance unit 6 Printing apparatus 61 Dot head 62 Platen head 7 Position adjustment function 72 Platen head holder 73 Operation body 74 Slack regulation body S Gap

Claims (3)

  A dot head provided with a printing wire, a platen head arranged opposite to the dot head at a predetermined interval, and an operating device for operating the printing wire are provided. In a printing apparatus for printing information, a printing unit including a dot head is fixed to a machine body side of a print processing apparatus, while a platen head is attached to the machine body side via a position adjustment mechanism to adjust the position. A printing apparatus, wherein a gap between a platen head and a dot head is adjusted by adjusting a position of the platen head by a mechanism.   The position adjustment mechanism includes a platen head holder for holding the platen head and an operation body for screwing or unscrewing the platen head holder with respect to the dot head. The printing apparatus according to claim 1, wherein a gap between the platen head and the dot head is adjusted by screwing or screwing the dot head.   The printing apparatus according to claim 2, further comprising a slack regulating body for preventing slack of the operation body.

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