JPH078222Y2 - Paper ejector for printing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a sheet ejection device for printing sheets printed by a cylindrical rotary printing head.

[Conventional technology]

A printer equipped with a cylindrical rotary printing head is shown in FIG.

Reference numeral 1 denotes an ink jet type print head which is formed in a substantially cylindrical shape and has a plurality of jet nozzles 2 provided on the outer surface thereof, and is rotatably provided by a rotary shaft 1a pivotally attached to the center. Reference numeral 3 denotes a printing paper which is parallel to the side surface of the printing head 1 and curved in a beam direction in an arcuate shape, and which is arranged to face the nozzle 2. The printing paper 3 receives a printing signal from the computer and rotates the printing head 1 in one direction and a jet nozzle. Printing is formed by the ink ejected from 2 at an appropriate timing and the upper feeding of the printing paper 3 by the paper feeding belt.

In this way, the printed printing paper 3 is forcibly discharged to the paper receiver as follows.

In FIG. 3, the pulled-up printing paper 3 is provided inside the guide plate 5 formed in an inverted U-shape by the rotation of the lifting roller 4 which is provided above the substantially center of the girder direction and connected to the driving means (not shown). Therefore, the feeding direction is guided to change from the upper side to the lower side.

The guide plate 5 is formed to have substantially the same width as the printing paper and is fixed to the machine frame. The printing surface of the printing paper 3 is always fed to the inner surface of the paper, and at the same time when the feeding direction is reversed, printing is performed. The cross section of the sheet 3 in the row direction is released from a presser (not shown) that is curved in an arch shape at the time of printing and opens in a substantially linear shape.

In this way, the printing paper 3 which is sent out to the front of the guide plate 5 and whose printing surface is sent downward is sent to the discharge roller 6 which is provided in front of the guide plate 5 in the paper feed direction and which is connected to the driving means (not shown), Further, the rotation of the discharge roller 6 sends the printing paper 3 forward.

Reference numeral 7 denotes a paper receiving portion fixed to the machine frame, having a bottom surface 7a having substantially the same width as the print paper 3 so that the print paper 3 sent out from the paper discharge roller 6 can be inserted, and the paper insertion end 7b is a paper discharge roller. 6 or the guide plate 5 in front of the feed direction thereof is arranged below the tip of the guide plate 5 while keeping at least the sheet stacking height limit, the front of the feed direction is inclined downward, and the locking piece 7c is bent upward at the tip. ing.

[Problems to be solved by the invention]

However, since the printing surface of the printing paper 3 is always fed inward and the guide plate 5 is formed in an inverted U shape, the printing paper 3 fed from the paper discharge roller 6 is sent.
The paper may be curled inward by the tip of the guide plate 5 and the paper receiving portion 7 during the transfer to try to roll inward of the printing paper during transfer. (Fig. 4). This is remarkable especially when solid ink is used.

When the leading edge of the paper comes into contact with the bottom surface 7a in this state and the paper is further fed, the curl becomes even stronger, and the paper may not be fed flat into the paper receiving portion 7 and may be folded.

This invention solves the above-mentioned defects, and enables the printing paper sent from the discharge roller to be flattened and fed into the paper receiving portion without being rolled, and further, the printed printing paper is stacked. The purpose is to enable.

[Means for solving problems]

According to the present invention, a paper which is curved in the direction of a girder and which is printed on the inside by a rotary printing head is pulled up vertically and then slid inside an inverted U-shaped guide plate to send it downwards. In the paper discharging device that stacks the paper by the paper discharging roller arranged in the front in the paper feeding direction, with the printing surface as the lower surface and the paper receiving portion which is spaced below the guide plate, and stacks the paper receiving end. The distance from is the limit stacking height of the paper, and the fixed guide body is arranged downward from the guide plate in front of the discharge roller in parallel to the paper feed direction and in the orthogonal direction, and is arranged in front of the paper feed direction in parallel with the fixed guide body. The upper side is swingably supported about an axis that is orthogonal to the paper feed direction horizontally, and the lower side is hung toward the bottom of the paper receiver to make it a free end. Can be guided to Further comprising a movable guide member which was proposes a paper discharge device of the printing machine, characterized in.

〔Example〕

An embodiment of the invention will be described below with reference to FIG. The same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

8 is bent upward at a right angle at the sheet insertion end 7b of the sheet receiver 7, and at a point A which is substantially the sheet stacking limit height from the bottom surface 7a,
It is a fixed guide body having a sliding surface 8a bent at a right angle to the rear of the paper feeding direction, and the sliding surface 8a is arranged apart from the guide plate 5 so that the printing paper 3 fed from the paper discharge roller 6 can pass therethrough. However, it is formed to have substantially the same width as the printing paper 3 in a direction orthogonal to the paper feeding direction.

Reference numeral 9 denotes a movable guide body arranged in front of the fixed guide body 8 in the paper feed direction, and an upper side 9a is swingably supported on a shaft 9b arranged in front of the guide plate 5 in the paper feed direction and orthogonal to the direction. The lower side 9c is hung in the direction of the bottom surface 7a of the paper receiving portion 7 to form a free end, which is formed to have substantially the same width as the printing paper.

Next, the operation of these guide bodies will be described.

The printing paper 3 is curved in an arc shape parallel to the outer circumference on the rotary head 1, and the fixed ink is melted and ejected.
While printing, the paper is pulled up by the paper feed belt, and is sent out by the pull-up roller 4 so that the inside of the guide plate 5 is inward, and the paper is discharged downward by the paper discharge roller 6.

At this time, the tip of the printing paper 3 tries to be rounded for a moment when it separates from the guide plate 5, but immediately contacts the sliding surface 8a of the fixed guide body 8 and slides to the point A while facing the feeding direction. . Further, when this leading edge is fed, the printing surface of the printing paper 3 is guided by sliding to the point A.

The front end of the printing paper 3 separated from the fixed guide body 8 contacts the intermediate portion of the movable guide body 9. Then, since the movable guide body 9 is pushed backward by the feeding force of the printing paper 3 and rotates backward, the paper 3 loses frictional resistance with the movable guide body 9 and slides downward along the surface of the movable guide plate 3. You will be notified. Next, the leading edge of the paper contacts the bottom surface 7a of the paper receiving portion 7, but since the non-printing surface of the printing paper 3 is pressed in the printing surface direction by the lower side 9c of the movable guide body 9, it does not curl, The bottom surface 7a is slid in the direction of the locking piece 7c by the paper feeding method, fed in, and placed on the bottom surface 7a. The print sheets 3 printed in this way are discharged one after another to the sheet receiving section 7.

Further, when the printing papers 3 are stacked on the bottom surface 7a and the height of the printing papers 3 increases, the lower side 9c of the movable guide body 9 presses the stacked papers downward, so that the accumulated printing papers 3 can be kept flat. Therefore, it is possible to smoothly feed the new printing paper 3.

Further, when the front end of the printing paper 3 is transferred from the movable guide body 9 to the paper receiving portion 7, the pressing force of the movable guide body 9 on the non-printing surface is the axis of the upper side even if the paper is already stacked on the bottom surface. Since it was pivoted to 9a, it can always be kept constant.

[Effect of device]

The configuration and operation of the present invention are as described above, and the printing surface of the printing paper sent from the paper discharge roller is slidably supported by the fixed guide body, and the non-printing surface is pressed by the movable guide body. It is possible to apply a force opposite to the direction in which the printing paper is about to roll on the bottom surface of the paper, and the printing paper can be fed into the paper receiving portion 7 without being rolled.

Also, since this movable guide plate is pivotally attached to the shaft at the upper side,
By pressing the lower side of the fed printing paper to the non-printing surface, the stacked printing papers can be kept flat.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a schematic view of a main part of a printer for printing by a conventional rotary printing head, FIG. 3 is a sectional view showing a conventional example, and FIG. 4 is the same. It is a principal part perspective view. 8: Fixed guide body, 9: Movable guide body

Claims (1)

[Scope of utility model registration request] 1. A paper which is curved in an arcuate shape in the girder direction and is printed inside by a rotary printing head, is pulled up vertically, and is slid on the inside of an inverted U-shaped guide plate to feed downward. In the paper ejection device that stacks the paper by the paper ejection roller located forward of the plate in the paper feeding direction, with the printing surface as the bottom surface and the paper receiving section that is spaced below the guide plate, stacking the paper insertion end of the paper receiving section. The distance from the bottom is the limit stacking height of the paper, and the fixed guide body is arranged downward from the guide plate in front of the discharge roller in parallel to the paper feed direction and in the orthogonal direction, and is arranged in front of the paper feed direction in parallel with the fixed guide body. The upper side is swingably supported around an axis that is perpendicular to the paper feed direction, and the lower side is hung toward the bottom surface of the paper receiving section to make it a free end. Information available Paper discharge device of the printing machine, characterized in that a movable guide member which was.