JP3940125B2 - Media horizontal holding device for digital printing machine - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a media horizontal holding device of a digital printing machine, and in particular, in a digital printing machine configured to print on a medium supplied from a sheet feeding roller and wind the printed medium on a sheet feeding roller. In some cases, the present invention relates to a media horizontal holding device of a digital printing machine that holds the media horizontally.

  In general, a digital printing machine (Digital Printing Machine) uses a digital control unit to digitize an output signal corresponding to a desired design and eject magenta (M), yellow (Y), The latest printing machine that draws the design desired by the user by using the subtractive mixing method that supplies the three primary colors of cyan (C) and paints the colors on the printing paper (hereinafter referred to as media) to create various colors. is there.

  In order to use the subtractive mixing method, inks having respective colors are individually received and supplied to heads that scan the respective colors, and inks of colors scanned from the respective heads are further applied. A new color appears.

  FIG. 1 is a perspective view of a main part showing a conventional digital printing machine, FIG. 2 is a diagram showing a configuration of a media level holding device of a conventional digital printing machine, and FIG. 3 is a diagram of a conventional media level holding device. It is the figure which showed the operation state.

  Looking at the state of use of a conventional digital printing machine, a rail-shaped transfer table 5 is provided on the upper part of the base 3 supported by the legs 1 on both sides, and the head unit 7 is fixed to one side of the transfer table 5. The cartridge 9 is connected so as to be transportable.

  The top surface of the base 3 is supplied with media (print media) from a paper feed roller 11 provided on the back surface of the digital printing machine, and the cartridge 9 is reciprocated left and right on the top surface of the media. Then, in conjunction with this, ink of a predetermined color is scanned from the head unit 7 to perform a printing operation, and the medium A printed on the winding roller 12 is wound on the opposite side of the paper feed roller 11.

“Media” is a term well known in the art, and refers to an object such as paper or cloth to which ink ejected by the head unit 7 is applied.
An operation panel 16 covered with a cover 15 is formed on one side of the base 3 so that a user can input desired parameters and print the medium A in a desired state.

  Four main ink boxes 13 for supplying magenta (M), yellow (Y), cyan (C), black (K), etc. are provided on one side of the leg 1 in a state of being stored in an ink storage case 14. It is done.

  Further, an auxiliary ink box 17 is provided on the opposite side of the head portion 7 of the cartridge 9 to supply ink to the head portion 7, and ink is supplied to the auxiliary ink box 17 from the main ink box 13. .

  In addition, as shown in FIG. 2, when the medium A is supplied from the paper feed roller 11 and printed, and then wound around the winding roller 12, the medium A is kept horizontal and has a certain tension. Thus, the media horizontal holding rod 30 is provided at a lower position inside the winding roller 12.

  In the media horizontal holding rod 30, the guide roller 32 is detached from the guide hole 22 of the guide member 20 which is fastened by a number of fastening members 26 in a state where the fixed surface portion 24 is in contact with the inner surface of the leg 1. Inserted and installed in a prevented state. The media horizontal holding rod 30 holds the media A level while moving up and down according to the change in tension due to the transfer speed of the media A.

Since the two horizontal guide bars 32 are configured separately, the media horizontal holding bar 30 can operate in a state where the heights of both side end portions are different.
Korean Utility Model Registration No. 20-0300888 Specification

  However, as shown in FIG. 3, when the medium A to be printed is narrow and the medium A is tilted to the right side, both sides of the medium horizontal holding rod 30 supporting the medium A from the medium A are When the length of the protruding part differs between the left and right sides, for example, when the left side is long and the right side is short, the tension applied to the media A increases at the left side, so that an overload is applied on the left side. become.

  Therefore, when the media horizontal holding rod 30 that holds the level of the medium A is tilted to the left, the level of the media A to be supported is tilted without being held, so that the media A cannot be printed accurately, and the media A is applied to the winding roller 12. There is a problem that is not wound correctly.

  The present invention has been devised in view of the above-described problems. In a printing machine that prints on a medium supplied from a paper feed roller and winds the printed medium on the paper feed roller, The purpose is to keep the media level when winding.

  In order to achieve the above object, the media horizontal holding device of the present invention includes a paper feed roller that supplies media, and a head unit that is provided on a base so as to print on the media supplied from the paper feed roller, A media horizontal holding device for holding a medium horizontally when winding the printed medium in a digital printing machine comprising a winding roller for winding the medium printed by the head unit and a leg for supporting the base, wherein the leg A guide member that is provided symmetrically on each inner side surface and is formed with upper and lower guide holes that are opened up and down, and a rack gear that is fastened and fixed to the inner side surface of the guide member and has gear teeth formed on the side surface, The pinion gear meshed with the rack gear is coupled, and the medium is unevenly horizontal. Even when applied and a media horizontal holding means to move up and down while maintaining a horizontal.

Further, it is preferable that an insertion hole for inserting the pinion gear and the horizontal holding means is formed on a side surface of the guide member.
Further, the media horizontal holding means pulls the media by its own weight, and has a media support base having a hollow portion formed therein, and is inserted and installed in the hollow portion of the media support base. A rotation shaft that rotates two pinion gears simultaneously with respect to the media support base, and insertion portions are inserted and installed on both side end portions of the media support base so that the rotation shaft is stable without friction by the first and second shaft bearings. And a shaft fixing body to be rotated.

  Still further, a bent portion is formed inside the upper and lower guide holes of the guide member, the bearing guide member is fixed to the bent portion, and the media horizontal holding means is in contact with the bearing guide member. A plurality of guide bearings are provided on the rotating shaft so as to guide the movement of the rotating shaft.

  Furthermore, it is desirable that a separation preventing member for preventing the guide bearing provided on the rotating shaft from moving sideways is fixed to the inner side surface of the guide member.

  The media horizontal holding device according to the present invention is a very useful and effective invention for stably holding the media horizontally when the printed media is wound up.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. As shown in FIG. 4, the media horizontal holding device according to the embodiment of the present invention is provided in a digital printing machine. The digital printing machine includes a paper feed roller 11 that supplies media, and a head unit 7 that is provided on the base 3 and moves horizontally so as to eject ink droplets onto the media A supplied from the paper feed roller 11 for printing. And a winding roller 12 for winding the medium printed by the head unit 7 and a leg 1 provided on the bottom surface of the base 3 for supporting a load. Further, as shown in FIGS. 5 and 6, the media horizontal holding device is fastened and fixed by a plurality of fourth fastening members 65 in a state in which the fixing surface portions 48 are in contact with the inner side surfaces of the legs 1 symmetrically. The guide member 40 formed with the upper and lower guide holes 61 that are opened up and down, and a number of first tightening members 52 and screw holes 54 fitted into the fitting holes 50 formed on the side surfaces of the guide member 40. A rack gear 56 that is fastened and fixed to the inner side surface of the guide member 40 and gear teeth are formed on one side surface, and a pinion gear 84 that is meshed with the rack gear 56 are coupled to each other. Media level holding means 64 that moves up and down while always keeping the level even when a horizontal force is applied.

Further, an insertion hole portion 42 into which the pinion gear 84 and the horizontal holding means 64 are inserted is formed on one side surface of the upper portion of the guide member 40.
As shown in FIG. 8, the media horizontal holding means 64 pulls the media A by its own weight and has a media support base 66 having a hollow portion 74 formed therein, and a hollow portion 74 of the media support base 66. Rotating shaft 80 that is inserted and installed inside, and simultaneously rotates two pinion gears 84 provided at both end portions with respect to the media support base 66, and fitting portions 76 are inserted into both end portions of the media support base 66. A shaft fixing body 68 that is installed and stably rotates the rotating shaft 80 without friction by the first and second shaft bearings 72 and 78.

  The first shaft bearing 72 is press-fitted and fixed in the locking hole 70 of the shaft fixing body 68, and the second shaft bearing 78 may be smaller in size than the first shaft bearing 72. There is no problem.

  Then, as shown in FIG. 7, a bent portion 44 is formed inside the upper and lower guide holes 61 of the guide member 40, and the bearing guide member 46 is fastened and fixed by a third tightening member 62. A plurality of guide bearings 82 are provided on the rotary shaft 80 so that the movement of the media horizontal holding means 64 can be guided in a state where it contacts the 46.

  Further, in order to prevent the guide bearing 82 provided on the rotating shaft 80 from moving sideways, a separation preventing member 60 fixed to the inner surface of the guide member 40 by a plurality of second tightening members 58 is provided. Install.

The first, second, third, and fourth tightening members 52, 58, 62, and 65 are preferably screws, bolts, and the like.
The rotating shaft 80 is inserted into the shaft fitting protrusion 86 of the pinion gear 84 and is fixed by a shaft fixing screw 88.

Hereinafter, operations and effects of the present invention will be described with reference to the accompanying drawings.
Looking at the assembled state of the media horizontal holding device according to the present invention, as shown in FIGS. 5 and 6, a plurality of guide members 40 are in contact with the fixed surface portion 48 on the inner surface of the leg 1. The four fastening members 65 are fastened and fixed.

Further, the rack gear 56 is brought into contact with the inner surface of the guide member 40, and the first tightening member 52 fitted in the fitting hole 50 is fastened and fixed to the screw hole 54.
An upper and lower guide hole 61 cut in the vertical direction is formed on the front surface of the guide member 40, and an insertion hole 42 is formed on the side surface thereof.

A bent portion 44 is formed inside the upper and lower guide holes 61, and a bearing guide member 46 that is tightened by a second tightening member 58 is provided.
Further, as shown in FIG. 7, a separation preventing member 60 fixed by a second tightening member 58 is provided on the opposite side of the bearing guide member 46 in order to prevent the guide bearing 82 from moving outward.

  As shown in FIG. 8, the fitting portions 76 of the shaft fixing body 68 are press-fitted and fixed to both side ends of the media support base 66 of the media horizontal holding means 64, and are inserted into the locking holes 70 of the shaft fixing body 68. The first shaft bearing 72 is press-fitted and fixed, and the second shaft bearing 78 is press-fitted and fixed inside the end of the locking hole 70.

Further, the pinion gear 84 is fixed to the end portions on both sides of the rotary shaft 80 by using shaft fixing screws 88 on the shaft fitting protrusions 86.
A guide bearing 82 is provided between the pinion gear 84 and the shaft fixed body 68.

Then, the pinion gear 84 and the guide bearing 82 of the media horizontal holding means 64 are inserted into the insertion hole portion 42 of the guide member 40 and are fitted into the upper and lower guide holes 61.
In such a state, the medium A supplied from the paper feed roller 11 is printed while passing through the head unit 7 provided on the base 3, and is leveled by the media support 66 of the media level holding means 64. It is wound around the winding roller 12 while being held.

  On the other hand, when the medium A is small and moves while tilting to the right or left side of the medium horizontal holding means 64, an eccentric load is applied to the medium support 66 as shown in FIG.

  At this time, the two pinion gears 84 are connected to the rack gear despite the fact that a deviation occurs in the loads on the left and right sides applied to the media support base 66 and a force to deviate the media support base 66 is applied. 56, the media support table 66 can always be kept horizontal since it moves up and down while simultaneously rotating by the rotary shaft 80.

  That is, even if an eccentric load is applied to the media support 66 by the media A and an excessive force is applied to the left or right pinion gear 84, the media A is eventually provided on the opposite side by the rotary shaft 80. The other pinion gear 84 also moves up and down the rack gear 56 while rotating at the same time, so that the media level holding means 64 can always hold the level.

When the medium A moves at a high speed, the medium horizontal holding means 64 moves upward along the upper and lower guide holes 61 of the guide member 40 under the tension of the medium A.
When the movement of the medium A becomes dull and the tension is relieved, the medium horizontal holding means 64 keeps the tension of the medium A constant while moving downward along the upper and lower guide holes 61 of the guide member 40. Therefore, the medium A is stably wound on the winding roller 12.

  When the media support table 66 moves up and down due to a change in the transfer speed of the media A, the pinion gear 84 rotates along the rack gear 56 and the rotation shaft 80 is fixed to both side ends of the media support table 66. The first shaft bearing 72 and the second shaft bearing 78 provided in the body 68 rotate without friction.

The guide bearing 82 coupled to the rotary shaft 80 also guides the vertical movement of the media horizontal holding means 64 while moving along the bearing guide member 46.
On the side of the guide bearing 82 is a detachment preventing member 60 coupled to the guide member 40 by a second tightening member 58 to prevent the media horizontal holding means 64 from detaching to the side.

  As described above, the media horizontal holding device according to the present embodiment prints on the media supplied from the paper feed roller, and in the configuration in which the printed media is wound up on the paper feed roller, the media horizontal holding for holding the media horizontal. A rotation shaft is provided in the hollow portion inside the means, pinion gears are provided on both sides of the rotation shaft, and the rack level gear fixed to the guide member moves the media horizontal holding means up and down while always maintaining the horizontal. Therefore, it is very useful and effective for stably winding the medium on the winding roller while always holding the medium horizontally.

The principal part perspective view which showed the conventional digital printing machine. The figure which showed the structure of the media horizontal holding | maintenance apparatus of the conventional digital printing machine. The figure which showed the operation state of the conventional media horizontal holding | maintenance apparatus. 1 is a perspective view showing a digital printing machine having a media horizontal holding device according to the present invention. 1 is an exploded perspective view showing a configuration of a media horizontal holding device of a digital printing machine according to the present invention. 1 is an assembled perspective view showing a media horizontal holding device of a digital printing machine according to the present invention. The top view which showed the state which looked at the media horizontal holding | maintenance apparatus by this invention from the top. The fragmentary sectional view which showed the state which the media horizontal holding | maintenance apparatus by this invention act | operates.

Explanation of symbols

1: Leg 3: Base 7: Head part 11: Paper feed roller 12: Winding roller 40: Guide member 42: Insertion hole part 44: Bending part 46: Bearing guide member 48: Fixed surface part 50: Fitting hole 52: First Fastening member 54: Screw hole 56: Rack gear 58: Second fastening member 60: Detachment preventing member 62: Third fastening member 64: Media horizontal holding means 65: Fourth fastening member 66: Media support base 68: Fixed shaft 70: Locking hole 72: First shaft bearing 74: Hollow portion 76: Fitting portion 78: Second shaft bearing 80: Rotating shaft 82: Guide bearing 84: Pinion gear 86: Shaft fitting protrusion 88: Fixed shaft Screw A: Media

Claims (3)

A paper feed roller for supplying media, a head portion provided on the base for printing on the media supplied from the paper feed roller, a winding roller for winding up the media printed by the head portion, and supporting the base In a media horizontal holding device that holds the media horizontally when the printed media is rolled up in a printing machine having a leg to
A guide member provided symmetrically on each inner side surface of the leg, and formed with an upper and lower guide hole opened up and down;
A rack gear fixed to the inner surface of the guide member and having gear teeth formed on the side surface;
A media level holding means that is coupled to a pinion gear meshed with the rack gear, and that moves up and down while maintaining level even when an uneven horizontal force is applied to the media ,
An insertion hole formed on a side surface of the guide member, into which the pinion gear and the media horizontal holding means are inserted;
A bent portion formed inside the upper and lower guide holes of the guide member;
A bearing guide member fixed to the bent portion;
A media horizontal holding device comprising: a plurality of guide bearings provided in the media horizontal holding means so as to guide the movement of the media horizontal holding means in contact with the bearing guide member. The media horizontal holding means pulls the media by its own weight and has a media support base in which a hollow portion is formed, and two pinions provided at both side ends inserted and installed in the hollow portion of the media support base. A rotating shaft that rotates the gear simultaneously with respect to the media support base, and a fitting portion is inserted and installed at both end portions of the media support base so that the rotational shaft is stable without friction by the first shaft bearing and the second shaft bearing. The media horizontal holding device according to claim 1, further comprising: a shaft fixing body that is rotated by a shaft. 2. The media horizontal holding device according to claim 1, wherein a separation preventing member for preventing lateral movement of a guide bearing provided on the rotating shaft is fixed to an inner surface of the guide member.

Images