JP2005324328A - Inkjet recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To correct a shift of a posture consequent to the up-down movement of a nozzle head. <P>SOLUTION: An inkjet recorder has a moving substrate 4 which is made movable in a width direction of a continuous forms paper 41 to a travel direction of the paper, a posture adjustment plate 6 which is supported to be able to oscillate and adjust in a horizontal direction and an up-down direction to the moving substrate, and a control device base 17 which is set to be movable up and down over a predetermined stroke to the posture adjustment plate. A case 39 of a control device with the nozzle head 40 of the inkjet recorder attached is fixed to the control device substrate. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is an ink jet recording apparatus. Specifically, when a continuous sheet fed from a roll paper has a protruding portion such as a seam, the ink discharge nozzle surface of the recording head can be protected by avoiding the protrusion at the protruding portion. The present invention relates to an inkjet recording apparatus.

  In the recording operation of the ink jet recording apparatus, the distance between the surface of the recording material (paper) and the ink discharge nozzle surface is set to an appropriate distance depending on the type of the recording material. At this time, when the recording material is a continuous paper fed out from the roll paper, the surface position is stable. Therefore, in order to improve the accuracy of the recorded image, the position where the ink ejection nozzle surface is as close as possible to the paper surface. Set the recording head to, and record the image. For this reason, when the thickened portion of the joint portion of the paper passes below the ink discharge nozzle, the thickened portion comes into contact with the lower surface of the ink discharge nozzle and rubs to damage the surface. May end up.

  In order to prevent this, in this type of conventional ink jet recording apparatus, the flatness of the paper is detected during the conveyance of the paper, and the protruding portion such as the paper splicing portion formed on the paper does not contact the ink discharge nozzle. Thus, the nozzle head is moved faster than the paper conveyance speed (see, for example, Patent Document 1).

JP 2002-192799 A

  As described above, every time the nozzle head detects the protruding portion of the paper, the nozzle head moves up and down as a protective operation of the ink discharge nozzle. Deviation may occur.

  With the nozzle head in the ink jet recording apparatus described in Patent Document 1, it has been impossible to correct the deviation of the printing posture accompanying the above-described protection operation.

  The present invention is intended to provide an ink jet recording apparatus that can solve the above-described conventional problems, and its configuration is movable in the width direction with respect to the running direction of continuous paper. A movable board, a posture adjusting plate supported so as to be swingable in a horizontal direction and a vertical direction with respect to the movable substrate, and a control device base provided so as to be movable up and down over a predetermined stroke with respect to the posture adjusting plate. It has a configuration in which a control device housing provided with a nozzle head of an ink jet recording apparatus is fixed to a control device substrate.

  In the ink jet recording apparatus, a horizontal adjustment device for adjusting the posture of the posture adjustment plate in the horizontal direction with respect to the moving substrate is provided on one side of the horizontal adjustment center of the posture adjustment plate. The posture adjustment plate is connected to the moving substrate so that it can swing horizontally and vertically, and the vertical distance between the moving substrate and the posture adjusting plate is adjusted on both sides of the swing center of the moving substrate. The configuration is provided with a vertical interval adjusting means that is made possible.

  According to the present invention, in order to protect the ink discharge nozzles of the nozzle head from the protrusions at the projecting portions such as the joints of the continuous paper that travels, the ink nozzles move up and down to cause a deviation in the posture of the nozzle heads. Sometimes, the posture of the nozzle head can be adjusted by swinging the posture adjustment plate in the vertical and horizontal directions with respect to the moving substrate, and the print posture deviation caused by the protective operation of the nozzle head in the vertical direction can be adjusted. It can be corrected.

  Embodiments of the present invention will be described with reference to the drawings.

  In the figure, 1a and 1b are a pair of left and right frames, and a pair of upper and lower rails 2a and 2b are provided horizontally on both frames 1a and 1b, and a rotating screw 3 is provided in the horizontal direction. A moving board 4 is slidably engaged with the pair of upper and lower rails 2a and 2b and supported so as to be movable in the left-right direction. The rotating screw 3 is attached to a bracket 4a provided on the back side of the moving board 4. Are screwed together, and the moving base 4 is moved in the left-right direction by rotating the rotating screw 3 by a motor (not shown). Eaves-like brackets 5a and 5b are provided at the upper end and the lower end of the movable base 4 so as to protrude to the back side.

  Reference numeral 6 denotes a posture adjusting plate which is arranged on the front side of the movable substrate 4 in parallel with the movable substrate 4 and which is enlarged in the vertical direction with respect to the movable base 4. An eaves-like bracket 7 that is placed on the upper side of the upper bracket 5a is provided, and a bracket 8 that is placed on the lower side of the lower bracket 5b on the moving base 4 is provided on the lower end portion.

  Then, at the same axial center position in the vertical direction, the upper bracket 7 of the posture adjusting plate 6 and the upper bracket 5a of the movable substrate 4 penetrate the one bracket 7 so as to be rotatable and slidable, and are screwed to the other bracket 5a. The lower bracket 8 on the lower side of the posture adjusting plate 6 and the lower bracket 5b on the lower side of the movable board 4 penetrate the one bracket 8 so as to be rotatable and slidable. The posture adjusting plate 6 is connected to the bracket 5b by a lower pivot pin 9b which is screw-coupled. The posture adjusting plate 6 is horizontal with respect to the movable substrate 4 with respect to the vertical axis center with the pivot pins 9a and 9b as fulcrums. It is coupled so as to be swingable in the direction and movable up and down.

  The posture adjusting plate 6 is supported by vertical distance adjusting means 10 and 10 which are adjustable on the movable board 4 at the upper side of the movable board 4 and symmetrically on both sides of the upper pivot pin 9a. Has been.

  The vertical distance adjusting means 10 and 10 are shown in an enlarged manner in FIG. 4, and are supported in a hole provided in the thickness direction of the movable substrate 4 so as to be rotatable and not to be pulled out by a stop ring. Screw portions are screwed into nut members 10a, 10a and screw holes provided in a direction orthogonal to the rotation axis thereof, a flange 11 is provided at an intermediate portion, and the bracket 7 on the upper side of the posture adjusting plate 6 is provided. The support rod 13 engages with the notch groove 12, and the thrust bearing 14 is interposed between the flange 11 and the lower surface of the bracket 7 and receives the weight on the posture adjusting plate 6 side. The screw portion is locked by a lock nut 13a.

  Handles 15, 15 are provided at the upper ends of the left and right support bars 13, 13, and the support bars 13, 13 can be rotated by the handles 15, 15. Is rotated by a tool or by hand individually in different directions, the positions of the left and right nut members 10a, 10a with respect to the bracket 7 are adjusted in the opposite directions in the vertical direction. The vertical interval is adjusted in the opposite direction on the left and right, and the posture adjusting plate 6 is swung in the vertical direction with respect to the moving substrate 4.

  At this time, the posture adjustment plate 6 swings in the vertical direction on both the left and right sides with respect to the pivot pins 9a and 9b. However, since the swing amount is slight, the pivot pins 9a and 9b are fitted. Absorbed at the joint.

  The posture adjusting plate 6 is moved up and down in parallel with the movable substrate 4 by rotating both the handles 15 and 15 in the same direction.

  A pair of left and right rails 16a and 16b are provided in the vertical direction on the front side of the posture adjusting plate 6, and the control device base 17 is engaged with the pair of left and right rails 16a and 16b so as to be slidable in the vertical direction. . A pair of left and right brackets 18, 18 are provided on the upper end portion of the control device base 17 toward the posture adjusting plate 6 side. Cylinder devices 19, 19 are provided between the brackets 18, 18 and the bracket 7 on the upper side of the posture adjusting plate 6, and the control device base 17 supports both the cylinder devices with respect to the posture adjusting plate 6. The cylinder devices 19 and 19 are supported in the vertical direction, and are moved upward with respect to the posture adjustment 6 by the extension operation of the cylinder devices 19 and 19, and are moved downward by the shortening operation.

  A pair of stopper bolts 20, 20 are provided on the upper surface of the bracket 7 on the upper side of the posture adjusting plate 6 so that the height position can be adjusted, and at the upper ends of the pair of stopper bolts 20, 20, The lower ends of the stoppers 21 and 21 provided at the upper part are in contact with each other, and the position of the control device base 17 in the descending direction is determined to be adjustable.

  Horizontally with respect to the pivot point by the pivot pins 9a and 9b of the posture adjustment plate 6 at one end in the left-right direction, the posture adjustment plate 6 with respect to the moving base 4, and the support pins 9a and 9b as fulcrums. A horizontal oscillating device 22 is provided which oscillates in the direction and adjusts the horizontal movement posture thereof.

  A worm wheel mechanism is used for the horizontal oscillating device 22 and is supported by a support plate 23 fixed to a side end portion of the posture adjusting plate 6.

  That is, a screw 25 a is provided at the distal end portion of the worm wheel shaft 25 to which the worm wheel 24 is fixed to the base end portion, and this screw 25 a is screwed into the movable base 4. Further, a flange 26 is provided at an intermediate portion of the worm wheel 25, and a compression spring 27 is disposed between the flange 26 and the moving base 4. The base end side of the flange 26 of the worm wheel shaft 25 passes through the support plate 23 with the washers 28a and 28b positioned on both sides, and further passes through the disc spring 29 and the worm base 30 on the base end side. A worm wheel 24 is fixed to the base end side of the base 30 with a push screw 31. The disc spring 29 applies a preload when the worm wheel 24 is fixed.

  Bearings 33a and 33b are fixedly attached to the worm base 30 so as to support both ends of the worm 32 screwed to the worm wheel 24. A shaft portion 34 extends in one axial direction of the worm 32, and a knob 35 is fixed to the shaft portion 34. By rotating this knob, the worm wheel shaft 25 is passed through the worm 32 and the worm wheel 24. Is rotated and moved in the axial direction with respect to the moving substrate 4. Reference numeral 36 denotes a support bar that passes through the worm base 30 and is fixed to the movable substrate 4. The support bar 36 holds the posture of the worm base 30. A cover body 37 covers the worm wheel 24 and the worm 33.

  The hole 23a of the support plate 23 through which the worm wheel shaft 25 passes is larger than the shaft diameter of the worm wheel shaft 25, and has a degree of freedom in movement in the vertical and horizontal directions.

  A housing 39 of a control device 38 of the ink jet recording apparatus is fixed to the control device base 17. Reference numeral 40 denotes a nozzle head provided on the lower side of the housing 39, and reference numeral 41 denotes a continuous sheet that runs facing the nozzle head 40 with a predetermined interval.

  A sensor (not shown) for detecting protrusions on the continuous paper 41, for example, a seam, is provided at the upstream of the running direction of the continuous paper 41. When the seam on the continuous paper 41 is detected by this sensor, the sensor position From the distance of the paper path to the nozzle head 40 and the traveling speed of the continuous paper 41, the timing at which the joint passes through the lower part of the nozzle head 40 is measured. Is expanded, and then shortened at a predetermined timing.

  In the above configuration, when the rotary screw 3 is rotated, the moving substrate 4 is moved in the left-right direction with respect to the frames 1a and 1b along the rails 2a and 2b, whereby the casing 39 of the control device 38 of the ink jet recording apparatus reciprocates. The nozzle head 40 is selectively moved across the print position facing the continuous paper 41 and the maintenance position on the side from the print position.

  When the nozzle head 40 is in the printing position and the sensor detects the joint of the continuous paper 41, the cylinder devices 19 and 19 are extended in accordance with the timing when the joint travels to the position of the nozzle head 40. The control device base 17 is raised along the rails 16a and 16b, the control device 38 attached to the control device base 17 is raised, and the nozzle head 40 is separated upward with respect to the continuous paper 41. The nozzle head 40 is retracted upward. As a result, the seam is prevented from coming into contact with the nozzle head 40, and the ink discharge nozzle can be prevented from being damaged by the seam.

  After the seam passes below the nozzle head 40, the cylinder devices 19, 19 are shortened to return the nozzle head 40 to the printing height for the continuous paper 41. The printing height at this time is set by the stopper 21 of the posture adjusting plate 6 coming into contact with the stopper bolts 20, 20 provided on the movable substrate 4. The printing height at this time is adjusted by screwing the stopper bolts 20 and 20.

  Further, in the above configuration, by loosening the lock nuts 13a, 13a of the support bars 13, 13 of the left and right vertical distance adjusting means 10, 10, and rotating the left and right support bars 13, 13 with the handles 15, 15, The distance in the height direction of the posture adjusting plate 6 with respect to the moving base 4 is adjusted, and thereby the height of the nozzle head 40 that is long in the width direction of the continuous paper 41 and the parallelism with respect to the width direction of the continuous paper 41 are adjusted. Is done. After this adjustment, the lock nuts 13a and 13a are tightened and fixed.

  If the adjustment amount of the left and right vertical distance adjusting means 10 and 10 at this time is changed left and right, and the posture adjusting plate 6 is swung in the left and right height directions, the posture adjusting plate 6 is moved to the pivot pins 9a and 9b. On the other hand, it is fixed in a state of being tilted to the left and right, but since the amount of tilt is small, it is absorbed by the fitting portions of the support pins 9a and 9b. In addition, the inclination of the support rods 13 and 13 at this time is absorbed by the rotation of the respective nut members 10 a with respect to the moving substrate 4.

  In the above configuration, the worm wheel shaft 25 is rotated via the worm 32 and the worm wheel 24 by turning the knob 35 of the horizontal swinging device 22, and the posture adjusting plate 6 is rotated by the rotation of the worm wheel shaft 25. The space between the movable substrate 4 and the movable substrate 4 is changed on one side in the left-right direction, and the posture adjusting plate 6 is swung horizontally with respect to the movable substrate 4 using the pivot pins 9a and 9b as fulcrums. The posture of the 40 sheet running direction is adjusted. The interval at this time is held by the compression spring 27.

  At this time, the support rods 13.13 of the vertical distance adjusting means 10, 10 located on both sides of the pivot pins 9a, 9b swing horizontally with respect to the posture adjustment plate 6 with the pivot pins 9a, 9b as fulcrums. Although being displaced, this displacement is performed along the notch groove 12 provided in the bracket 7 of the posture adjusting plate 6.

  The lock after the horizontal swing adjustment of the posture adjusting plate 6 is performed by the automatic tightening function of the worm wheel mechanism. In addition, you may provide the locking device which fixes the movement board | substrate 4 and the attitude | position adjustment board 6 separately from this.

  In the horizontal swing device 22 when the posture adjusting plate 6 swings in the left-right height direction with respect to the moving substrate 4, it escapes in the space of the hole 23 a of the support plate 23 fixed to the posture adjusting plate 6.

It is a partially broken side view schematically showing an embodiment of the present invention. It is a partially broken rear view schematically showing an embodiment of the present invention. 1 is a plan view schematically showing an embodiment of the present invention. It is an expanded sectional view of the AA arrow of FIG. It is an expanded sectional view of the BB arrow of FIG. It is CC arrow line view of FIG.

Explanation of symbols

  1a, 1b ... frame, 2a, 2b, 16a, 16b ... rail, 3 ... rotating screw, 4 ... moving substrate, 4a, 4b, 5a, 5b, 7, 8, 18 ... bracket, 6 ... posture adjusting plate, 9a, 9b ... Pivot pin, 10 ... Up / down interval adjusting means, 10a ... Nut member, 11, 26 ... Flange, 12 ... Notch groove, 13 ... Support rod, 13a ... Lock nut, 14 ... Thrust bearing, 15 ... Handle, 17 ... Control device base, 19 ... Cylinder device, 20 ... Stopper bolt, 21 ... Stopper, 22 ... Horizontal swing device, 23 ... Support plate, 23a ... Hole, 24 ... Worm wheel, 25 ... Worm wheel shaft, 25a ... Screws, 27 ... compression springs, 28a, 28b ... washers, 29 ... disc springs, 30 ... worm base, 31 ... push screws, 32 ... worms, 33a, 33b ... bearings, 34 ... shafts, 3 ... knob, 36 ... support rod, 37 ... cover, 38 ... controller, 39 ... housing, 40 ... nozzle head, 41 ... continuous paper.

Claims (3)

  A moving board that is movable in the width direction with respect to the running direction of the continuous paper, a posture adjusting plate that is supported so as to be swingable in a horizontal direction and a vertical direction with respect to the moving substrate, and a posture adjusting plate And a control device base that is vertically movable over a predetermined stroke, and a control device housing provided with a nozzle head of the ink jet recording device is fixed to the control device substrate.   The horizontal direction adjusting device for adjusting the posture of the posture adjusting plate in the horizontal direction with respect to the moving substrate is provided on one side portion with respect to the horizontal swing center of the posture adjusting plate. Inkjet recording apparatus. The posture adjustment plate is connected to the moving substrate so that it can swing horizontally and vertically, and the vertical distance between the moving substrate and the posture adjusting plate is adjusted on both sides of the swing center of the moving substrate. 3. An ink jet recording apparatus according to claim 1, further comprising an up / down interval adjusting means.

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