JP2575812Y2 - Printhead ribbon mask - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a ribbon mask for a print head that allows a sheet to be set smoothly and easily even when the sheet width is different.

[Prior art] When a time card is inserted into the time recorder, the time card passes from the top to the bottom of the ribbon mask to prevent card contamination from the ribbon attached to the print head, and prints the time card. It stops at the position, and after printing, discharges from the bottom up.

In the conventional ribbon mask, as shown in FIG. 6, both sides of the front surface of the mask M are bent rearward from the bending line L along the front surface of the print head, and the time card C enters the inside of the print head. The upper part Ma of the mask is also bent backward so that there is no mask. In order to make such a bend, a V-shaped notch K for bending is formed in the upper portion Ma of the ribbon mask from the bending intersection.

[Problem to be Solved] According to the conventional example, when the print head is waiting at the position where the time card C is to be set, the lower edge of the card is
If a time card in which Ca is warped to the ribbon mask M side is inserted, if the time card is somewhat wide, the notch K of the notch K and the lower edge of the card on the inclined surface Ka near the mask center
Ca was caught and hindered the time card set,
Printing becomes impossible.

The purpose of the present invention is to ensure that the paper is not caught in the notch for folding, regardless of the width of the paper, and where the print head is waiting when setting the paper, so that the paper can be set smoothly. It is intended to be able to be provided easily at a low cost.

[Means for Solving the Problems] The ribbon mask of the print head according to the present invention includes a front portion, left and right side portions, a front upper guide piece, a left and right upper guide piece, and a notch for bending. Is what it is. The front portion has a window hole through which the ink ribbon can be seen. The left and right sides are provided on both the left and right sides of the front part,
The front portion is bent rearward at a vertical bending line. The front upper guide piece is provided above the front portion, and is bent rearward of the front portion at a first horizontal bending line. The upper left guide piece and the upper right guide piece are provided above the both side portions, respectively, and are bent rearward at the front portion at a second horizontal bending line. The notch for bending is formed at the boundary between the upper front guide piece and the upper left guide piece and at the boundary between the upper front guide piece and the upper right guide piece. At least one of the notches is a vertical surface in which one inner surface located on one side of the front upper guide is provided on an extension of the vertical bending line, and the other inner surface is an inclined surface. In the shape of “レ”. The above-mentioned vertical plane includes one that is substantially located on an extension of the vertical folding line.

[Action] When the width of the inserted paper is different and the lower edge of the paper faces the inclined surface of the notch for bending, or when it extends over the vertical surface to one side of the front upper guide, In any case, such as when facing the upper guide piece, the lower edge does not catch on the notch.

[Embodiment] In FIG. 1, the front rectangular ribbon mask includes a front guide piece 1 and an upper guide piece 2. The front guide piece 1 constitutes the main part of the ribbon mask,
Left and right side parts 12, 13 are provided on both sides of 11, and both side parts 12, 13 are provided.
Numeral 13 is bent at the rear of the front part 11 (the rear as viewed from the front side of the print head and the rear side of the drawing) at the vertical bending lines 3 and 3. A diamond-shaped window hole 11a is formed in the center of the front portion 11 so that the ink ribbon can be seen.

The upper guide piece 2 is provided above the ribbon mask, and a front upper guide piece 21 is located at the center. The front upper guide piece 21 is provided above the front portion 11 and bent toward the rear of the front portion 11 (leftward in FIG. 3) at the first horizontal bending line 4. On the left and right sides of the front upper guide piece 21, a left upper guide piece 22 and a right upper guide piece 23 are located, respectively. Upper left guide piece 22 and upper right guide piece 23
Is provided above the left side portion 12 and the right side portion 13, and the second
At the horizontal bending lines 4a, 4a of FIG.

The first horizontal bending line 4 and the second horizontal bending line 4a are located on the same straight line.

As shown in FIGS. 1 and 2, the boundary between the front upper guide piece 21 and the left and right upper guide pieces 22 and 23 is provided at a position corresponding to the vertical bending lines 3 and 3 for bending. Notches 5,5 are formed.

The notch 5 has a vertical surface 51 and an inclined surface 52 as shown in FIG.
Thus, the shape is formed in a “レ” shape. In the notch 5, the inner surface of the notch located on the front upper guide piece 21 side is a vertical surface provided on the extension of the vertical bending line 3.
51, the inner surface of the notch located on the left upper guide piece 22 or the right upper guide piece 23 side is inclined toward the intersection of the vertical bending line 3 and the horizontal bending lines 4, 4a. Slope
52.

The ribbon mask is attached to the print head as follows.

That is, as shown in FIG. 5, a carriage 8 movably supported by a pair of guide shafts 9, 9 in the printer is wound around pulleys (not shown) at the left and right ends of the printer, and is a movable timing belt. It is fixed to one side of 10, and can move left and right by rotation of the pulley.

A print head 7 is provided on the carriage 8, and a ribbon guide 71 for guiding an ink ribbon (not shown) is provided in front (front side) of the print head 7.

A ribbon mask mounting tongue piece 14 is wound around the ribbon guide 71, whereby the ribbon mask is mounted on the front surface of the ribbon guide 71. The front (front) of the ribbon mask faces a platen (not shown). An ink ribbon is passed between the front of the print head 7 and the ribbon guide 71. At the time of printing, a time card (not shown) is inserted from above the print head 7 into the front of the ribbon mask and set at a predetermined position. Then, the print head 7 is guided by the guide shaft 9 and pushes out the print wire while moving to the left and right, hits the time card via the ink ribbon, and prints the time card with the ink of the ink ribbon.

Next, the operation in the case where the lower edge 61 of the paper, for example, the time card 6 is warped toward the ribbon mask and several time cards having different widths are used will be described.

For example, the position where the print head 7 waits substantially coincides with the position where the time card is set, and the lower edge 61 of the time card is in the range W as shown in FIG. If the time card 6 is inserted within the width of the notch 5, the lower edge 61 is inclined.
While the warp is corrected in the front direction (arrow direction) of the ribbon mask along 52, the ribbon mask descends from above as shown by a downward arrow without being caught by the notch 5.

When a time card wider or narrower than the width of the time card 6 is used, the lower edge is fed into the range W1, W2 on both sides of the notch 5 for bending. When the wide time card 6a shown by the solid line in FIG. 4 is used, it is sent into the range W1. The front upper guide piece 21 is bent by the horizontal bending line 4 and bent rearward, and the notch surface between the notch 5 and the notch surface is a vertical surface.
51, the width of the front upper guide piece 21 is not narrowed but is bent backward as shown in FIG. 3 while keeping the same width as the front part 11, so that in this case, a wide time The lower edge 61a of the card 6a first comes into contact with the surface of the front upper guide piece 21, and while being guided by that surface, its warp is corrected in the front direction (the direction of the arrow) while being inserted downward as shown by the downward arrow. go.

When the narrow time card 6b shown by the chain line in FIG. 4 is used, it is sent into the range W2. In this case, the lower edge 61b of the time card 6b abuts against the surfaces of the upper left guide piece and the upper right guide piece (only the upper left guide piece 22 is shown in the drawing), and is guided in the front direction while being guided by that surface. While the warp is being corrected, it is inserted downward as indicated by the downward arrow.

Depending on the printing range of the time card, the notch 5 for bending may be configured such that one notch has a "R" shape and the other notch has, for example, a V-shape. It is not necessary to adopt the configuration shown in FIG.

In addition, the vertical plane only needs to be located substantially on the extension of the vertical bending line, and the direction of the vertical plane and the direction of the bending line do not need to completely match.

The means for moving the print head to the left and right and the method of attaching the ribbon mask to the print head are not limited to the present embodiment.

[Effect] According to the present invention, since a notch for bending in the shape of "R" is provided, when using paper having different curled widths, the lower edge of the paper has a notch for bending. In the case of facing the inclined surface, crossing the vertical surface on one side of the front upper guide, and facing the upper guide piece on both the left and right sides, the lower edge is inserted while its warpage is corrected,
The paper is set smoothly and easily without being caught by the notch. Further, it can be provided at a low cost with a simple configuration.

[Brief description of the drawings]

1 is a front view of a ribbon mask, FIG. 2 is an enlarged rear view of a main part, FIG. 3 is a cross-sectional view taken along line AA of FIG. 2, and FIG. 4 is an enlarged rear view showing a relationship between a time card and a notch. FIG. 5 is a perspective view from the back side of the print head to which the ribbon mask is attached, and FIG. 6 is an enlarged rear view showing a main part of the conventional example. 11 ... front part, 11a ... window hole, 12, 13 ... side part, 21 ... front upper guide piece, 22 ... left upper guide piece, 23 ... right upper guide piece, 3 ... vertical direction Bending line, 4... First horizontal bending line, 4a... 2nd horizontal bending line, 5
…… Notch, 51 …… Vertical, 52 …… Slope.

Claims (1)

(57) [Scope of request for utility model registration] 1. A front portion having a window hole through which an ink ribbon can be seen, and left and right sides provided on both left and right sides of the front portion, and bent right and left rearward of the front portion at a vertical folding line. A side portion, a front upper guide piece bent above the front portion at a first horizontal bending line and provided above the front portion, and provided above the both side portions, respectively; A left upper guide piece and a right upper guide piece bent rearward of the front portion at a second horizontal bending line; a boundary between the front upper guide piece and the left upper guide piece; It comprises a notch for bending formed at the boundary between the upper guide piece and the right upper guide piece, and at least one of the notches has one inner surface located on one side of the front upper guide. Set up on the extension of the above vertical bending line Its dependent a vertical plane, the ribbon mask of print head and the other of the inner surface, characterized in that it forms a "re" shape is an inclined surface.