JPH04103372A - Printing base device for ink jet printer - Google Patents

Abstract

PURPOSE:To make it possible to turn a printing base by a large angle without being interfered by a pinch roller and guide plate, and assuredly push out a printing paper after printing to the discharge direction by arranging a plurality of printing bases on vertical planes which are located between adjacent printing paper feed rollers. CONSTITUTION:On the downstream side of an ink head 1 at a printing paper carrying path, a plurality of paper feed rollers 2, which are located in the vicinity of the moving track of the ink head 1, are fixed on a driving shaft 4 with specified intervals. A printing base shaft 6 is turnably provided on a straight line which confronts with the moving track of the ink head 1, and on this printing base shaft 6, a plurality of printing bases 7, which are located on vertical surfaces which are between adjacent paper feed rollers 2, are fixed with specified intervals. Therefore, the printing bases 7 can be turned by a large angle without being interfered by a pinch roller 3 and guide plate 5 when printing is completed. By this method, it becomes possible to push out the rear end edge of a printing paper assuredly to the paper discharge direction by flat; surfaces 7a of the turning printing bases 7.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a printing stand device for an inkjet printer.

2. Description of the Related Art First, an example of a conventional inkjet printer will be described with reference to FIG. A plurality of paper feed rollers 2 are rotatably provided with care in parallel to the movement locus of the ink head 1. A support plate 31 that rotatably holds the pinch roller 3 is attached to a guide plate 30 facing the upper outer peripheral surface of these paper feed rollers 2 so as to be biased downward and displaceable in the vertical direction. . A frame 32 is rotatably held on both sides of the drive shaft 4 to which the paper feed roller 2 is fixed, and a flat marking stand 33 facing the ink head 1 is fixed to this frame 32. Furthermore, a guide 3S having an inverted U-shaped groove 34 is fixed to one side of the frame 32, and a gear 37 having a shaft 36 that engages with the groove 34 is rotatably provided. This gear 37 is connected to the drive shaft 4 via a plurality of gears (not shown).

In this configuration, the paper is conveyed onto the printing table 33 by the paper feed roller 2 and the pinch roller 3, and printing is performed by driving the ink head 1. In inkjet printers, ink dries more slowly than in other printers, so it is not preferable to pull out printed paper with a roller because the roller will come into contact with the ink immediately after printing. Therefore, the paper feed roller 2 and the pinch roller 3 are arranged near the upstream side of the ink head 1, and the gear 37 is rotated counterclockwise by a predetermined angle and the guide 35 is pressed by the shaft 36. , the printing stand 33 is tilted counterclockwise together with the frame 32 around the drive shaft 4, thereby assisting the movement of the paper to the left after lever printing.

Problems to be Solved by the Invention Since the marking stand 33 interferes with the guide plate 30 or the pinch roller 3, etc., it is not possible to increase the rotation angle of the marking stand 33. As a result, the paper ejection operation by the marking stand 33 is insufficient. .

Means for Solving the Problems An ink head that is reciprocally driven in a linear direction and a predetermined interval on an axis parallel to the movement locus of the ink head near the upstream side of the ink head in the paper conveyance path. A plurality of paper feed rollers arranged in an open manner, a guide plate arranged at a predetermined interval and facing the outer periphery of the paper feed roller, and a plurality of paper feed rollers held by these guide plates and pressed against the paper feed roller. facing the ink head in a vertical plane passing between a pinch roller, a printing stand shaft connected to a drive unit and rotatably installed on a straight line facing the movement locus of the ink head, and the adjacent paper feed roller; and a plurality of stamp stands fixed at predetermined intervals on the stamp stand shaft, each having a flat surface extending toward the paper feed roller side.

Function: Since the plurality of marking stands are arranged in a vertical plane passing between adjacent paper feed rollers, they can be arranged close to the axis of the paper feed roller, thereby placing the trailing edge of the paper near the ink head. Furthermore, since the pinch roller and guide plate can be placed in a vertical plane where the printing stand does not exist, the printing stand can be rotated at a large angle without interfering with the pinch roller and the guide plate when printing is completed. Therefore, it becomes possible to reliably push out the trailing edge of the paper after printing in the paper ejection direction by the flat surface of the rotating printing stand.

Embodiment An embodiment of the present invention will be explained based on FIGS. 1 and 2. 1 is an ink head, and this ink head 1 is mounted on a carrier (not shown) that is driven back and forth. On the downstream side of the ink head 1 in the paper conveyance path, a plurality of paper feed rollers 2 located near the movement locus of the ink head 1 are fixed to a single drive shaft 4 at predetermined intervals. A plurality of guide plates 5 are arranged facing each other at predetermined intervals on the upper outer periphery of these paper feed rollers 2.
A pinch roller 3 that contacts the paper feed roller 2 is rotatably held on these guide plates 5. Therefore, the printing stand shaft 6 is placed on a straight line opposite to the movement locus of the ink head.
is rotatably installed, and a plurality of stamp stands 7 are fixed to this stamp stand shaft 6 at predetermined intervals, positioned in a vertical plane passing between the adjacent paper feed rollers 2. Although these stamp stands 7 have a triangular shape, they may have a polygonal shape other than a triangle, as long as they have a flat surface 7a facing the ink head 1.

Next, as shown in FIG. 1, a drive gear 8, which is a drive unit connected to a motor (not shown), is fixed to one end of the drive shaft 4, and a gear 9 meshed with the drive gear 8 is connected to a motor (not shown). Coaxially connected to the gear 10 so as to rotate integrally,
A gear 12 is provided at one end of the marking shaft 6, which is biased by a spring 1 and is slidable in the axial direction and prevented from rotating in the rotational direction. Furthermore, a stopper 13 that comes into contact with the carrier described above is loosely fitted to one end of the marking shaft 6.

In such a configuration, the drive gear 8 receives the driving force of the motor and rotates counterclockwise to feed the paper.

The ink head 1 moves with the carrier to the non-printing area after printing is completed, but at this time the carrier presses the stopper 13, so the stopper 13 slides along the printing stand shaft 6 against the force of the spring 11 and pushes the gear 12. mesh with gear 10. As a result, the stamp stand 7 rotates counterclockwise together with the stamp stand shaft 6, and the flat surface 7a pushes out the trailing edge of the printed paper to the left.

As described above, since the plurality of marking stands 7 are arranged in a vertical plane passing between adjacent paper feed roller roughs, they can be arranged close to the axis of the paper feed roller roughs. Since the pinch roller 3 and the guide plate S can be arranged in a vertical plane where the printing stand 7 does not exist, the printing stand 7 can be guided by the pinch roller 3 when printing is completed. It can be rotated through a large angle without interfering with the plate 5. Therefore, the flat surface 7a of the rotating printing stand 7 can reliably push the trailing edge of the printed paper in the paper ejection direction.

Effects of the Invention As described above, the present invention includes an ink head that is reciprocally driven in a linear direction, and an ink head that is located near the upstream side of the ink head in the paper conveyance path and on an axis that is parallel to the movement trajectory of the ink head. A plurality of paper feed rollers arranged at predetermined intervals, a guide plate arranged at a predetermined interval and opposed to the outer periphery of the paper feed roller, and a roller held by these guide plates and pressed against the paper feed roller. In a vertical plane passing between a plurality of pinch rollers, a printing stand shaft connected to a drive unit and rotatably installed on a straight line opposite to the movement locus of the ink head, and the adjacent paper feed roller, The printer is configured with a plurality of stamp stands having a flat surface facing the ink head and extending toward the paper feed roller side, and fixed on the stamp stand shaft at a predetermined interval,
Since the plurality of printing stands are arranged in a vertical plane that passes between adjacent paper feed rollers, they can be arranged close to the axis of the paper feed roller, which allows the trailing edge of the paper to be close to the ink head. In addition, since the pinch roller and guide plate can be placed in a vertical plane where the printing stand does not exist, the printing stand can be rotated at a large angle without interfering with the pinch roller and the guide plate when printing is completed. Therefore, it is possible to reliably push out the trailing edge of the paper after printing in the paper ejection direction by the flat surface of the rotating printing stand.

[Brief Description of the Drawings] Figures 1 and 2 show an embodiment of the present invention, with Figure 1 being a perspective view, Figure 2 being a side view, and Figure 3 being a side view of a conventional example. It is. 1... Ink head, 2... Paper feed roller, 3...
Pinch roller, 5... Guide plate, 6... Marking stand shaft, 7.
... Seal stand, 7a... Flat surface, 8... Drive part diagram (Yumi! 3)

Claims (1)

[Claims] An ink head that is reciprocally driven in a linear direction, and a plurality of ink heads arranged at predetermined intervals on an axis parallel to the movement locus of the ink head, which is located near the upstream side of the ink head in the paper conveyance path and is parallel to the movement locus of the ink head. a paper feed roller, a guide plate disposed at a predetermined interval and facing the outer periphery of the paper feed roller, a plurality of pinch rollers held by these guide plates and pressed against the paper feed roller, and a drive unit. A printing stand shaft that is connected and rotatably installed on a straight line facing the movement locus of the ink head, and a vertical plane passing between the adjacent paper feed roller, facing the ink head and facing the paper feed roller side. A marking stand device for an inkjet printer, comprising a plurality of marking stands having an extending flat surface and fixed on the printing stand shaft at a predetermined interval.