JPH04276472A - Mechanism for changing over recording paper route of printer - Google Patents

Abstract

PURPOSE:To obtain excellent recording paper inserting properties, transfer properties and printing quality by avoiding the unnecessary transfer of ink due to the contact with a type at the time of insertion by certainly inserting the recording papers of machinery inserting separate recording papers in directions opposed to each other regardless of the bending habit and rigidity of the recording papers. CONSTITUTION:A revolvable auxiliary guide 10 is arranged in the vicinity of the confluent point of first and second recording paper routes and first recording paper is guided toward a paper feed roller 3 by the auxiliary guide 10 and second recording paper 2 is linearly guided along a printing surface 14 by rotating the auxiliary guide 10 in the direction shown by an arrow A.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates primarily to a printer installed in a cash register or the like, and more particularly to recording paper path switching in a printer that prints by inserting separate recording papers from opposite directions.

0002

2. Description of the Related Art Conventionally, this type of technology is constructed as shown in FIG. It was located on the side. When setting the first recording paper, the first recording paper 1 inserted along the first recording paper path regulated by the main frame 7 and the paper feed frame 8 behind the printing unit is After passing through the section, the direction of movement is regulated in the direction of the paper feeding section by the slope of the guide surface 7-a of the main frame 7, and the paper is sent to the paper feeding section.
When setting the second recording paper, insert it through the opening of the main frame 7 in front of the printing section, which is the second recording paper path.
Due to the slope of the guide surface 8-a of the paper feed frame 8, the paper is inserted up to the printing part. Thereafter, the second recording paper 2 on which printing was performed using the typefaces 6 had a structure in which it was pulled out in the opposite direction to when it was inserted.

0003

[Problems to be Solved by the Invention] However, the above-mentioned prior art had the following problems.

(1) As shown in FIG. 5, the direction and degree of the bending of the first recording paper 1 inserted from the first recording paper path,
Depending on conditions such as rigidity, the tip portion 1-a may be attached to the main frame 7.
contacting or entering the second recording paper path of
In some cases, it was difficult to insert the first recording paper 1, or the first recording paper 1 could not reach the paper feeding mechanism.

(2) As shown in FIG. 6, the second recording paper 2 inserted from the second recording paper path is curved further along the guide surface 8-a installed at the tip of the second recording paper path. As a result, depending on the direction and degree of bending of the second recording paper, and conditions such as rigidity, the leading edge 2-a protrudes from the printing section window of the paper guide 9 toward the type 6 side, and as a result, during printing operation. If the type 6 and the leading edge 2-a come into contact with each other and ink adheres to the second recording paper 2, or if printing is performed forcibly while the leading edge 2-a is in contact with the type 6, the printing mechanism may malfunction. In some cases, problems may occur.

The present invention has been made to solve such problems, and by switching the recording paper path in which different recording papers are inserted from opposite directions,
The purpose is to insert, eject, print, etc. on recording paper regardless of its bending tendency or rigidity.

[0007]

[Means for Solving the Problems] The recording paper path switching mechanism for a printer according to the present invention is used in a printer that inserts and prints separate recording papers from opposite directions in a printing section having a set of characters. A first recording paper path for the first recording paper, which is inserted from the suction side in the recording paper transport direction for printing, and a first recording paper path for the first recording paper, which is inserted from the discharge side in the recording paper transport direction and printed on, which is located approximately on an extension of the printing surface. The second recording paper path of the second recording paper is rotatable to switch the path between the first recording paper and the second recording paper near the confluence of the first recording paper route and the second recording paper route. It is characterized by having a paper path switching board.

[0008]

[Operation] According to the above structure of the present invention, when the first recording paper is inserted from the suction side in the recording paper transport direction, the paper path switching plate restricts entry into the second recording paper path, When inserting the second recording paper, if you insert it along the path that is approximately an extension of the printing surface, the paper path switching plate will rotate at the end of the second recording paper to form the second recording paper path. In addition, since the second recording paper path is set substantially on the extension of the printing surface, the second recording paper can be inserted linearly. Thereby, the second recording paper can be inserted smoothly without protruding from the printing section window toward the type 6 side.

[0009]

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
Explain according to the following.

In this embodiment, the paper path switching board is the auxiliary guide 10, and the recording paper guide board is the paper guide 9.

FIG. 1 is a schematic sectional view of a recording paper path switching mechanism of a printer installed in a cash register or the like according to an embodiment of the present invention, and FIGS. 2 and 3 are explanatory diagrams of the mechanism of the present invention. In these figures, the same or
Equivalent parts are given the same symbols.

At the rear of the printing section, there is a first paper path provided between the main frame 7 and the paper feed frame 8, and at the front upper part of the printing section, there are a paper feed roller 3 and a paper presser roller 4.
There is a paper feeding mechanism consisting of a paper presser roller shaft 5, and an auxiliary guide 10 that is rotatably supported by the paper presser roller shaft 5. Furthermore, in front of the printing section, there is a second recording paper path formed by a paper feed frame 8 and a paper guide 9, and below the paper guide 9, there is a type formed of rubber that is pivotally supported on the main frame 7. There is a printing section equipped with 6.

To explain the relationship between the auxiliary guide 10 and the paper guide 9 in more detail, the auxiliary guide 10 is supported by the paper presser roller shaft 5, and when the first recording paper 1 and the second recording paper 2 are not inserted, the auxiliary guide 10 is supported by its own weight. The first recording paper 1 is positioned by the moment caused by
The scooping unit 10-1 that scoops up the paper guide 9 prints at the printing window 9-1.
It's getting into. Further, the paper presser roller rotates around the shaft 5 due to a small moment. The rotation range of the auxiliary guide 10 is regulated by the bending portion 9-2 of the paper guide 9 in the clockwise direction and by the paper feed roller 3 in the counterclockwise direction.

Next, the operation will be explained. FIG. 1 shows how the first recording paper 1 is inserted.

The first recording paper 1 is inserted from the first recording paper path entrance 12 at the rear of the printing section along the first recording paper path up to the paper guide 9, and is guided by the paper guide 9 until it passes through the printing section.
Further, it reaches a junction with the second recording paper path. Second recording paper 2
Since the auxiliary guide 10 is blocking the second recording paper path when the auxiliary guide 10 is not inserted, the first recording paper 1 inserted from the first recording paper path will move along the auxiliary guide 10 to the paper feeding mechanism section. The sheet of paper is guided to the direction of the arrow E, is held between the paper feed roller 3 and the paper press roller 4, which are rotating in the direction of arrow E, and is ejected.

After that, the selected type 6 on the first recording paper 1
is pushed out from the inside by a hammer (not shown) and presses the first recording paper 1 against the printing surface 14 to transfer ink transferred from an ink roll (not shown) to perform printing. After the printing process is completed, the paper feed roller 3 rotates to feed the paper.

Since the first recording paper 1 has a scooping section 10-1 located further away from the path than the paper guide 9, even if the roll paper is reversely curled, it is surely scooped up and placed in the first recording paper path. I will definitely guide you.

FIG. 2 shows how the second recording paper 2 is inserted.

The second recording paper 2 is inserted along the paper guide 9, and further reaches the auxiliary guide 10 along the bent portion 9-1 of the paper guide 9. When the second recording paper 2 goes further, the auxiliary guide 1
0, but rotate the auxiliary guide 10 in the direction of arrow A and proceed while securing the second recording paper path. (10A indicates the auxiliary guide after rotation.) When the second recording paper 2 is pulled out after completing the printing process, the auxiliary guide 10 returns to its original position due to its own weight, blocks the second paper path, and returns to the first paper path. form.

Since the second recording paper path is located substantially on the extension of the printing surface, the second recording paper 2 is not bent during insertion, so it is inserted smoothly, and the second recording paper 2
does not bend into the printing area, and therefore no ink from the printed characters 6 adheres.

FIG. 3 is a top view showing the operation status of the recording paper path switching mechanism of the present invention.

When the first recording paper 1 inserted from the first recording paper path behind the printing section reaches near the paper guide 9, both ends of the first recording paper 1 are guided by the paper guide 9. Passes through the printing section. At the junction with the second recording paper path in front of the printing section, the tip of the auxiliary guide 10 is installed so as to go below the printing section window of the paper guide 9. First recording paper 1 being slid and transported in the direction of arrow B
is guided by the auxiliary guide 10 and reaches the paper feeding mechanism section.

The second recording paper 2 inserted from the second recording paper path advances in the direction of arrow C along the surface of the paper guide 9, lifts up the auxiliary guide 10 blocking the second recording paper path, and reaches the printing section. inserted. When the second recording paper 2 is pulled out, the auxiliary guide 10 returns to its original position, blocks the second recording paper path, and secures the first recording paper path again.

[0024]

[Effects of the Invention] As described above, the present invention has the following excellent effects.

A second recording paper is inserted from the discharge side in the recording paper transport direction to print on the first recording paper near the confluence of the first recording paper route and the second recording paper route, which is located approximately on an extension of the printing surface. By having a rotatable paper path switching board that switches the path of the second recording paper and Since there are no edges or the like, good insertion and transfer are ensured regardless of the bending tendency, rigidity, etc. of the first recording paper. Furthermore, the second recording paper path, which is inserted from the front of the printing section, can be secured in a straight line to the printing section without bending, resulting in good insertion performance regardless of the bending tendency or rigidity of the second recording paper. , withdrawal is now possible. As a result, it is possible to avoid the recording paper from getting caught in the recording paper path and from coming into contact with type, thereby achieving excellent recording paper insertion performance, transportability, printing quality, etc.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of a recording paper path switching mechanism of a printer installed in a cash register or the like according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a recording paper path switching mechanism according to the present invention.

FIG. 3 is an explanatory diagram of a recording paper path switching mechanism of the present invention.

FIG. 4 is a schematic cross-sectional view of a recording paper path, showing an example of the prior art.

FIG. 5 is a schematic cross-sectional view of a recording paper path, showing an example of the prior art.

FIG. 6 is a schematic cross-sectional view of a recording paper path, showing an example of the prior art.

[Explanation of symbols]

1 First recording paper 2 Second recording paper 3 Paper feed roller 4 Paper press roller 5 Paper presser roller shaft 6 Rubber type 7 Mainframe 8 Paper feed frame 9 Paper guide 10 Auxiliary information

Claims (1)

[Claims] Claim 1: In a printer that prints by inserting separate recording sheets from opposite directions in a printing unit having one set of printed characters, a first record that is inserted from the suction side in the recording paper transport direction and printed. a first recording paper path for paper; a second recording paper path for a second recording paper that is located substantially on an extension of the printing surface and is inserted from the discharge side in the recording paper transport direction for printing; and the first recording paper path. A printer comprising a rotatable paper path switching plate that switches the path between the first recording paper and the second recording paper near the confluence of the paper path and the second recording paper path. Recording paper path switching mechanism.