JP2539352Y2 - Recording paper processing mechanism in inkjet printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mechanism for processing recorded recording paper in an ink jet printer.

(Prior Art) In an ink jet printer, it is necessary to dry an image written by ink droplets after recording and writing.

Heating means, air blowing means, or a combination thereof are usually used for this type of drying treatment. However, applying such means to a printer not only unnecessarily complicates the apparatus but also requires a great deal of processing. This is not preferable because it involves power consumption, and further, when a high-density recording image is written, the recording paper is ejected without sufficiently drying the ink image. There is a problem that the surface of the previous recording paper is stained by semi-dry ink due to contact with the recording paper.

In order to solve such a problem, the apparatus disclosed in Japanese Patent Application Laid-Open No. 1-145545 has a pair of rail members rotatably disposed on both sides of a paper discharge tray, and temporarily discharges the recording paper. The recording unit is held on the rails, and the rails are rotated in the evacuation direction to drop the recording unit onto the discharge tray. It is excellent in that the ink image written on the previous recording paper is dried using the recording / writing time. However, it has a problem that it cannot cope with recording paper of different sizes because it has a structure in which the left and right rails are pivotally supported at fixed positions. Due to the rotating structure, if the friction coefficient of the rail surface is different on the left and right, there is a problem that the recording paper may fall obliquely and not be properly stacked on the paper output tray. Occurs.

(Problem to be solved by the present invention) The present invention has been made in view of such a problem, and its purpose is to temporarily hold the recording paper discharged regardless of the size. An object of the present invention is to provide an improved recording paper processing mechanism that can be properly dropped.

(Means for Solving the Problems) That is, according to the present invention, as a recording paper processing mechanism in an ink jet printer for achieving the above object, a recording paper placed in each recording / writing cycle by releasing a downward pressing force by a cam member. A hopper plate which is urged by an urging member and is displaced upward so as to instantaneously contact the peripheral surface of the paper feed roller is disposed below the paper discharge tray. A pair of paper width regulating members having a height reaching the upper side are attached so as to be able to expand and contract in the width direction according to the paper width, and a narrow paper supporting the lower side of the discharged recording paper at the upper end of these paper width regulating members. The receiving plate is integrally mounted.

(Operation) With this configuration, the recording paper ejected after the recording / writing process is temporarily held by the paper receiving plate to suppress the ink stain caused by the contact between the recording papers, and to supply the recording paper. The recording paper held by the upward displacement of the hopper plate at the time of paper is properly blown down onto the paper discharge tray by using its static inertia force.

(Embodiment) Therefore, an embodiment illustrated below will be described.

FIG. 1 shows an embodiment of the present invention. In the figure, reference numeral 1 denotes a hopper plate disposed below the discharge tray 5, and the hopper plate 1 acts on the lower surface of the recording paper s so that the leading end of the recording paper s can contact the paper feed roller 4. The rear end is pivotally supported by a pin 3 while being constantly urged upward by a hopper spring 2. As shown in FIG. 4, on both sides of the hopper plate 1, a pair of paper width regulating plates 7, 7 integral with the rack rod 6 are slidably mounted in the width direction. Is meshed with a common pinion 8 provided on the lower surface of the hopper plate 1 so that it can be expanded and contracted equally to the left and right. The paper width regulating plates 7, 7 have a height reaching the upper side of the paper discharge tray 5, and the upper end thereof is configured to temporarily support both lower surfaces of the recording paper s discharged from the printer main body. A narrow paper receiving plate 9 is integrally attached.

On the other hand, as shown in FIG. 2, a paper feed cam gear 14 which rotates once per recording cycle via an idler 13 meshes with a pinion 12 fixed to a paper feed shaft. Has a D-shaped cam which is in sliding contact with a part of the hopper plate 1.
15 is fixed, and the hopper plate 1
The recording paper s is released by the hopper spring 2 and pushed up by the hopper spring 2 so that the leading end of the recording paper s placed thereon is
And the recorded recording paper s held on the paper receiving plates 9, 9 is vibrated at that time so that the discharge tray 5
It is configured to be washed off on top.

In the drawing, reference numeral 17 denotes a print head, and 16 denotes a paper feed motor.

In the apparatus configured as described above, while the recording and writing is being performed by the printer, the hopper plate 1 is pushed down below the circular arc portion 15a of the D-shaped cam 15 acting on this portion (second). (A), in this state, the paper receiving plates 9, 9, which are integrated with the paper width regulating plates 7, 7,
It is located on substantially the same plane as the platen 10 so that it can receive the recording paper s discharged from the printer body.

For this reason, the recording paper s discharged after receiving the recording / writing process is guided by the paper receiving plates 9 and 9 without contacting the recording paper which has been subjected to the recording / writing process immediately before the recording paper s, and is placed on both sides of the lower surface. (FIG. 1 (a), FIG. 3 (a)).

When one cycle of recording and writing is completed in this way, the D-shaped cam 15 rotating in conjunction with the paper feed roller 4
Releases the pressing of the hopper plate 1 with its notch 15b downward. As a result, the hopper plate 1 instantly jumps up under the urging force of the hopper spring 2, and the recording paper s
At the same time as the paper feed rollers 4, and the paper receiving plates 9, 9 integral with the paper width regulating plates 7, 7 are rapidly raised, and the recording paper s held thereon is reduced in its static inertia force. The sheet is dropped on the sheet discharge tray 5 by utilizing (FIG. 3 (b)).

Originally, at this point, the recording paper s for which the writing processing has been performed earlier is placed on the discharge tray 5, but the ink image written on this recording paper s is written on the next recording paper s. The ink is sufficiently dried before being processed, discharged, and dropped from the paper receiving plates 9, 9, so that the ink image is not disturbed by the newly removed recording paper s.

FIG. 5 shows another embodiment which is configured to enable a rapid rise of the hopper plate. This embodiment is a paper feed cam 25 which has a staggered shape in which the diameter changes rapidly. A pin 23 provided on one side of the hopper plate 21 using a cam
To the hopper plate 21 at the time of transition from the large diameter part to the small diameter part.
Is quickly flipped up, and the loaded recording paper is fed to the paper feed roller 24.
, And the recording paper is more effectively wiped off from the paper receiving plate 29.

(Effects) As described above, according to the present invention, the hopper plate which is displaced upward for each recording / writing cycle is disposed below the paper discharge tray, and the upper end of the hopper plate is provided on both sides of the hopper plate. The paper width regulating member with a height reaching the paper section is mounted so as to be displaceable in the width direction, and a narrow paper receiving plate is provided at the upper end for supporting both sides of the lower surface of the discharged recording paper. In addition to temporarily holding the recording paper to prevent ink contamination caused by contact between the recording papers, the recording paper held by the upward displacement of the hopper plate during paper feeding is properly ejected by using its static inertia force. You can drop it on the tray. In addition, since the paper receiving plate is formed integrally with the paper width regulating member, the function of preventing the above-mentioned contamination can be imparted to the conventional apparatus by making only a slight change to the conventional apparatus. Can be dealt with equally regardless of the size of

[Brief description of the drawings]

FIGS. 1 (a) and 1 (b) are side views of an apparatus according to an embodiment of the present invention, showing a state of receiving and removing discharged recording paper, and FIGS. 3 (a) and 3 (b) are front views of the apparatus shown in each of the above states, FIG. 4 is a top view of the hopper plate, and FIG. 5 is a hopper plate drive. It is a figure showing other examples about a part. 1, 21 hopper plate, 4 paper feed roller 5, 25 discharge tray, 7 paper width regulating plate 9, 29 paper receiving plate, 10 platen 15, 25 paper feed cam

Claims (1)

(57) [Scope of request for utility model registration] The recording paper placed in each recording / writing cycle after the downward pressing force of the cam member is released is urged by an urging member and displaced upward so as to instantaneously contact the peripheral surface of the paper feed roller. A hopper plate is disposed below the paper discharge tray, and a pair of paper width regulating members whose upper ends reach above the paper discharge tray can be expanded and reduced in the width direction according to the paper width. Mounting, on the upper end of each paper width regulating member,
A recording paper processing mechanism in an ink jet printer, wherein a narrow paper receiving plate for supporting both lower surfaces of the discharged recording paper is integrally mounted.