JPS5935407Y2 - printer paper guide mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a paper guide for a printer used in an ECR calculator or the like.

The purpose of this invention is that when issuing a receipt, a cashier or the like who operates an ECR cannot wait for the receipt to be fast-forwarded to the designated paper-cutting position after it is printed, and accidentally grabs the receipt with their hand. The goal is to prevent paper jams from occurring in the printing press and causing malfunctions when printing.

In conventional printers, as shown in Figure 1, the paper guide 1 only regulates the paper thickness direction, and the tip is free.
As explained in the above purpose, if the cashier accidentally grabs the receipt 2 with the finger 3 too quickly, paper jams can easily occur inside the printer (particularly in the print head 4 area in the case of a serial dot printer), making it difficult to easily take out the receipt. This was a serious drawback for an ECR for supermarkets with a fast turnover of customers, as it required a service call.

The present invention eliminates such drawbacks, and one embodiment thereof will be described below.

Figure 2 and subsequent figures show one embodiment of the present invention, and in Figures 2 and 3, the receipt 2 is fed by a paper feeding means (not shown) provided on the left side, and the receipt 2 is guided in the paper thickness direction. The structure is such that the paper is guided to just in front of the print head 4 by a first paper guide member consisting of a pair of paper guides 1, and then guided to the print section.

As shown in FIG. 4, the printing section by the print head 4 cannot guide the paper because the print head moves in the width direction of the paper, and a space is forced to be formed.

The paper guide after the printing section consists of a roll paper guide spring 7 and a lower cutter blade 10, and is guided by a second paper guide member that forms a tapered space where the roll paper 2 is easily guided. You will be led to the exit section.

Here, the relationship between the length A of the space created in the printing section and the length B of the space formed by the second paper guide member is A<B
A paper presser plate 6 is provided at a position where the slack of the paper does not occur in the space of the printing section, and is absorbed by the space provided by the second paper guide member, thereby preventing paper from jamming. .

In the state shown in Fig. 2, when receipt 2 is fed at the outlet of the printer using a presser foot with finger 3, etc., since A<B, the stiffness of receipt 2 becomes A>B, and the second paper guide member Since a tapered space is formed, the receipt 2 that gets stuck at the exit is folded at the weak part B as shown in Figure 3, and then immediately bent at the print head 4 and folded into the print head. 4
It will not get caught and become a paper jam.

Incidentally, the slack of the receipt 2 of the print head 4 shown in FIGS. 2 and 3 is absorbed by the inclined surface 4a of the print head 4 and is not caught.

Therefore, even if the cashier accidentally grabs Receipt 2 too early and it gets jammed inside the printer, if you pull out Receipt 2 early, the paper will jam in the back of the printer and the dot head will get stuck. There is no need for a service call due to damage to the wire or the inability to easily remove the jammed receipt 2.

Furthermore, by making the paper press plate 6 an elastic material instead of metal, even if a paper jam occurs in the print head 4, the edge of the paper press plate 6 will cut the receipt when the receipt is pulled out. , paper jammed receipts do not remain inside the printer and can be easily taken out.

As described above, according to the present invention, a cashier who operates an ECR at a supermarket or the like where customers are lining up in long lines can be saved even when a paper jam occurs, which is unavoidable in order to quickly grab a receipt. Since receipts can be easily retrieved without any manual operation, the printer can be widely offered to the market as a reliable and cost-effective serial dot printer for ECR that does not keep important customers waiting. can.

[Brief explanation of drawings]

FIG. 1 is a side view showing a conventional system. Figures 2 and 3 are side views showing one embodiment of the present invention;
The figure shows a plan view. 1...Paper guide, 2...Receipt, 3.
...Finger, 4...Print head, 5...
...Head cover, 6...Paper presser plate, 7...
... Roll paper guide spring, 8 ... Ink ribbon, 9 ... Stamp, 10 ... Cutter lower blade, 11 ... Print holder, 12 ...・・・・・・
Cutter upper blade, 13... Journal, 14.
15...Frame.

Claims (1)

[Scope of utility model registration request] In a serial printer in which a print head moves in the digit direction to perform printing, a first paper guide member that guides a roll paper to the front of the print head as a printing means, and a first paper guide member for moving the print head in the digit direction. a second paper guide member having a tapered space in the paper thickness direction that guides the roll paper from a space in the printing section where paper guidance is impossible to the exit of the roll paper of the printer; and a paper pressing member that presses in a direction to correct the sagging of the roll paper that tends to occur in the space of the paper, and the space of the printing section is moved from the space provided by the second paper guide member to the roll paper. A paper guide mechanism for a printer, characterized in that the paper holding member is provided at a position that becomes smaller in the length direction.