JPS63242577A - printer paper pushing mechanism - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a paper holding mechanism on the paper ejection side of a printer.

(Prior art) In printers that perform printing without reciprocating the printing means in the axial direction of the platen, the paper is pressed against the platen surface in the axial direction of the platen in order to prevent printing misalignment. A paper holding plate is provided, and a vapor pail is provided on the discharge side.

By the way, when loading and unloading paper, the leading edge of the paper that rises from the bottom of the platen hits the vapor pail, so the paper is kept away from the platen surface until it is set in the specified position, and once it is set, the vapor pail is returned to its original position. Operation is required.

For this reason, in a printer that automatically sets and stores cut sheets, a mechanism for automatically opening and closing the vapor pail is required, resulting in a complicated structure.

(Objective) The present invention has been made in view of the above-mentioned problems, and its object is to provide a printer paper holding mechanism that does not require a special paper holding operation.

(Example) The details of the present invention will be described below based on illustrated examples.

FIG. 1 shows an embodiment of a printer to which the present invention is applied, and the reference numeral 1 in the figure is a housing of the printer, which includes a control device (not shown), a platen, and a carriage for moving the printing mechanism. It is accommodated. Reference numeral 2 denotes a rotatable upper lid main body, which is rotatably attached to the upper end of the housing on the printing head side, and has a paper pushing mechanism 3 made of a transparent polymeric material and has a rib 4 (described later) formed at the tip thereof. is fixed.

Note that the reference numeral 9 in the figure indicates a paper position regulating mechanism.

FIG. 2 shows an embodiment of the aforementioned rib 4,
Top lid 21Fr When set in the printer 1, a first slope 5 that receives the leading edge of the paper and guides it to the back side of the platen surface when paper is set, and an apex that presses the paper against the platen P with as small a gap as possible. 6 and a second slope 7 that guides the portion where printing has been completed upward, and as shown in FIG. has been done.

Next, the operation of the apparatus configured as described above will be explained based on FIG. 4.

When the top cover main body 2 is fixed to the printer 1 and paper K is inserted between the platen P and paper guide plate G from the top (Zuko),
A sensor (not shown) detects the insertion of paper and
Rotate. As a result, the paper is wound around the platen P, and the leading end of the paper is made to protrude from the paper guide portion of the carriage C. When the paper is fed roughly by the platen P, the leading edge of the paper comes into contact with the first slope 5 of the rib 4 (■), moves forward (leftward in the figure) along this slope 5, and reaches the apex 6. (In)

As a result, the paper is pressed by the apex 6 at the upper part of the print head, against the elasticity of the paper, that is, the reaction force of the waist, and a resistance force in the axial direction of the platen P is applied.

When the paper is inserted to a predetermined position in this manner, rotation of the platen P is stopped and printing is started. When one line of printing is completed, one platen P with a corresponding width is rotated to feed the paper. In this process, the printed portion moves upward along the second slope 7 and is discharged upward (IV).

FIG. 5 shows a second embodiment of the present invention, in which ribs 10, 10, 10, etc., arranged in the central part, that is, the part where the carriage waits when loading paper, are used to guide the leading edge of the paper. Ribs 2o, 20, 20, . . . are placed on both sides of the paper leading edge guiding slope 21 with respect to the widening angle of the first slope 21.
The spread angle is slightly larger.

In this embodiment, when the paper is loaded, the central part of the paper is regulated by the guide plate of the carriage, and the rib 10
．． 10.1o..., 20.20.2o..., and on the other hand, depending on the type of paper, the guide section D
(Fig. 4), the ribs 20, 20, 20, etc., which are deformed to the front side by receiving the deflection of the center part and ascend, or are arranged laterally, are the first slopes. Since the paper 21 is given a large expansion angle, even a slight bend in the paper can be caught and guided along the first slope 21 to the apex 22.

According to this embodiment, the ribs on both sides can absorb the deformation of both sides of the paper, which is relatively likely to occur, and it is possible to prevent paper jams, or so-called jams, which are likely to occur during setting.

In the above embodiment, the paper pushing mechanism is configured as a separate body, but it is clear that the same effect can be obtained even if the paper pushing mechanism is configured integrally with the lid body.

(Effects) As described above, in the present invention, there is provided a slope that guides the leading edge of the paper that has risen from the platen to the upper side of the platen;
A rib having an apex that maintains a constant distance from the platen surface is placed on the side opposite to the platen of the upper lid of the housing housing the printing means.
Since we installed multiple units at intervals in the axial direction of the platen,
The number of parts and assembly man-hours are reduced by eliminating the need for vapor pails,
'l@Not only can you reduce costs by reducing the amount of paper, but also because the leading edge of the paper is guided by the slope when loading paper, there is no need for a special opening/closing mechanism like when using vapor pails, and automatic loading is possible. Operation can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the printer to which the present invention is applied, FIG. 2 is a front view showing an embodiment of the rib, and FIG. 3 is an embodiment of the paper presser mechanism that opens in FIG. 4 is an explanatory diagram showing the operation of the same device as above, FIG. 5 is a perspective view showing another embodiment of the present invention, and FIG. 6 is a front view showing an enlarged view of the rib in FIG. 5. It is a diagram. 1...Printer 2...Top lid body 3...
Paper pushing mechanism 4...Rib 5...First slope 6
...Vertex 7...Second slope Applicant Seiko Epson Co., Ltd. Agent Patent attorney Haruto Nishikawa 81hiko Mokuzai Figure 1 Figure 4 (I) (M > Figure (Ding, ? (IV) )

Claims (2)

[Claims] (1) A rib with a slope that guides the leading edge of the paper rising from the platen to the upper side of the platen and a top part that maintains a constant distance from the platen surface is placed on the side opposite to the platen of the upper lid of the housing housing the printing means in the axial direction of the platen. A printer paper pushing mechanism consisting of a plurality of printer paper pushing mechanisms arranged at intervals. (2) The printer paper pushing mechanism according to claim 1, wherein the ribs are formed so that the wider the ribs are disposed toward the end, the larger the angle with respect to the vertical direction of the slope. .