JPS609027Y2 - Printer paper feeding structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a printer paper output mechanism built into a printer device, and particularly relates to a paper feeding structure for copying printer paper.

(2) Background of the technology In modern communication systems, especially telephone exchange systems, in order to manage call time, call charges, etc., data control panels are equipped with operation keys, a display panel, and a printer device for obtaining hard copies. It is used as an input/output terminal.

Conventionally, this type of control panel has been installed in hotels, etc.
The call time, charges, etc. of each guest room's telephone are printed on two sheets of copy printer paper built into the printer device, one of which is printed on the guest's bill, and the other is used for storage and management. It is used as.

(3) Conventional technology and problems FIG. 1 shows an example of an operation panel equipped with a printer device.

The operation panel 1 includes operation buttons 3 for inputting control information, telephone numbers, etc., a display panel 2 for displaying data, and output information (
A mini-printer device 4 is provided for outputting a bill (according to telephone number, etc.) onto a printer paper 6.

The printer device has a front cover 5, an opening 7 for outputting printer paper 6, a manual printer paper feeder 8, and the like.

Note that 9 is an electronic component housing section.

FIG. 2 is a sectional view taken along the line II in FIG. 1, and the detailed structure is omitted.

In the figure, numeral 10 is a printing section, 11 is a printer paper feed frame,
12 is roll paper for double copying (printer paper), 1
3 is a paper brake plate that presses the printer paper.

In FIG. 2, two sheets of printer paper 12 are drawn into the printing section 10 one by one, and the printer paper feed frame 1
1 and the platen piece are output to the opening 7.

The printer paper brake plate 13 has a speed adjustment function to stably feed two sheets of printer paper.

It also has a function of detecting the remaining amount of paper in conjunction with the brake plate 13, but this is not related to the present invention and will therefore be omitted.

FIG. 3 shows FIG. 2 in more detail,
The two-ply printer paper 12 rotates about the paper shaft 120 in the direction of the arrow.

The printing unit 10 is a printer paper feeding piece 1 which is cut out from a rubber elastic body.
1 and a platen piece (pressing rod) 110 sandwich the printer paper and send out the paper by frictional force.

Note that 111 is a paper guide plate.

Printer paper is separated from paper A for printing and paper B for copying, and conventionally, in the absence of a brake plate that presses from above, two sheets of printer paper are pushed out into the opening 7 of the printer each time a print is made. When printing side A, the amount of paper fed out is greater than the double sheet paper B, causing slack in the double sheet and the slack getting caught in the printing area, making it impossible to feed the paper (commonly known as jamming). In addition, there have been problems in that the printer paper in the fixed section is swayed left and right due to the vibration of the printing section and splashes caused by the tensile impact force, causing the two sheets to be misaligned.

As one method for solving this problem, a braking plate 13 shown in FIG. 3 is constantly pulled by a spring 131 on a support bar fixed to the front cover 5 around its rotation axis 130 to press the printer paper. A structure has been proposed.

According to the above method, there is a relationship between the frictional forces shown in the diagram of the printer section and the diagram of the brake plate section in FIG.

In the figure, dl and d2 are the radii from the center of paper feeder 11 to paper A and B, and μm is the radius between paper feeder 11 and paper 8.
The friction coefficient between paper A and paper 8, μ2 is the friction coefficient between paper A and paper 8, μ
3 is the coefficient of friction between the platen piece 110 and paper A, μm is the coefficient of friction between the brake plate 13 and paper A, r□, r2 are the radius from the central axis 120 of printer paper 12 to paper A and paper B, p , and p2 are the pressing forces of the platen piece 110 and the brake plate 13, respectively.

Here, since the paper feeding piece 11 is usually made of rubber and the platen piece 110 is made of metal (for example, brass), the friction coefficient is μm.
There is a relationship of 〉μ2〉μ4〉μ3.

Therefore, when focusing on copy paper B of printer paper, considering the pressing force (=P1 μl) due to the pressing force P1 of the platen frame 110 and the braking force (-P′2IL2) due to the brake plate 13, the actual feeding force of the copy paper B FB=P1μm−P2P2.

On the other hand, for paper A on the printing surface, the pushing force (= P1μ2
) and the braking force by the braking plate 13 (=-P'2IL4
), the actual feeding force for paper A is FA=Plμ2-P2JJ, 4.

Here, considering that the brake plate 13 is usually made of metal or the like, and that the friction coefficient μ4 of the brake plate 13 and the friction coefficient P2 of the paper are μ2>μ4 as shown earlier, The difference in resistance is always P2H2-P2
There is a relationship H4>0, and even if the pressing force of the braking plate 13 is increased and P2 is increased, the braking force (resistance force) P'2I1.2 applied to the paper B is greater.

Therefore, even if an attempt is made to delay only paper A, paper B will also be braked to a greater extent.

That is, even in normal operation, there is a difference in the length of the paper contact surface due to the difference in the radial direction of the paper feeder 11 (di>d2) (paper A tends to come out longer) and printer paper 1
Due to the difference in feed amount due to the difference in radius (rl>r2) from the rotation axis of 2, printer paper A always tends to come out longer, and even if braking is applied, the braking of paper B is faster. The number is increasing.

Naturally, therefore, the paper A is ejected longer than the paper B, and the structure is such that the paper A is fed out by a larger amount than the difference in the inner and outer diameters mentioned above.

However, according to this method, the printer paper pressing force P
1 and the coefficient of friction between sheets (A, B) changes depending on external environmental conditions such as humidity, which can cause uneven paper feeding force. The method was not perfect.

(4) Purpose of the Invention The purpose of the present invention is to provide a printer paper feeding structure that prevents sheet misalignment using a new idea in order to eliminate the above-mentioned drawbacks.

(5) Structure of the Invention In order to achieve the above object, the present invention provides a printer device incorporating roll-shaped printer paper for copying, in which the printer paper is rolled up with the printing paper on the inside and the copy paper on the outside. A braking plate equipped with a traction mechanism that makes the pressure on the paper surface variable is provided on the upper surface of the printer paper in the drawing direction, and the rotation direction of the paper feed frame of the printer section and the rotation direction of the printer paper are reversed. The printer paper is pulled out directly from the lower end of the braking plate and is folded back and attached to the printer section, and the braking by the braking plate and the braking in the printer section are applied to the outer copy paper. do.

(6) Examples of ideas The present invention will be explained in detail below using the drawings.

FIG. 5 is a diagram of the printer paper feeding structure of the present invention.

The same reference numerals as those in FIG. ).

The support bar 132 fixed to the front cover is different from the one shown in FIG. 3 in that it has a plurality of spring support holes 133, so that the pressure force of the brake plate 13 on the paper surface can be varied.

The printer sheets rotate in the direction of the arrow around a shaft 120, and the uppermost sheets A and B are directly inserted into the printer section 10 from below the top surface against the brake plate 13.

The printing surface of the printer paper becomes the inner paper A when it is rolled up, and the copying surface becomes the outer paper B.

Based on the above configuration, the operation of the printer paper will be explained below with reference to detailed drawings of the printer section A and the brake plate section in FIG. 6.

Paper feed piece 11. Platen piece 110, paper A.

The friction coefficients μm, μ2, and μ3 of B are the same as those shown in FIG. The radius of rotation is r2 for paper A and r□ for paper B.

The friction coefficient is μm〉μ2〉μ4〉μ3 as in Figure 4.
Under this condition, printer paper B is sent out with a pushing force (=P□μm) due to the pushing force P1 of the platen frame 110.

Paper A is fed by a frictional force P1μ2 with printing paper B, and the difference in operating radius of paper feeder 11 (A (di) - (B (d
2) >0) is the rotation radius difference of printer paper (B (rl
) −A (r2) > O).

At this time, the relationship between paper A and paper B in the frame 11 is the same as before, but on the roll paper side, the relationship is reversed, and paper B is longer in length.

However, the focus of this invention is to use paper B as a reference, and by applying a brake to paper A, paper A and paper B in the printing section are
The purpose of this invention is to make it possible to correct the operating distance.

That is, the actual extrusion force FB' of paper B is FB'=P1μm-P'2IL4, and the actual extrusion force FA' of paper A is FA'=Pl
μ2−P2IL2.

Compared to the conventional configuration, this means that the first
Although the terms and conditions are the same, the relationship of braking (resistance) by the braking plate 13 is reversed.

Therefore, the paper B is pushed out by the piece 11 (usually made of rubber or the like, which pushes out the paper B by rotating; that is, ideally, μm=1, and the paper B moves so that it comes into close contact with the piece 11). When doing so, normally paper A tries to come out as much as the outer diameter of paper B and paper A at frame 11, but if P2 is increased by adjusting the braking force of brake plate 13, P2/J, There is a relationship of 2>P2H4, and the braking of paper A is greater, and the extrusion of paper A is suppressed.

In addition, the resistance force P2μ2 of paper A becomes smaller even when the coefficient of friction μ2 changes due to differences in the paper type or the external environment (humidity, etc.). The speed of the paper A can be limited by moving it to the side and increasing the pressing force P2 of the brake plate 13.

That is, the resistance force P21L2 of paper A and the resistance force P2 of paper B
μ, >P2H4, and paper A is difficult to be fed.

In this way, since the copy paper is wound with the printing surface inside and the pressing force of the brake plate is variable, the paper feed can be braked based on the paper B1, that is, the paper wound on the roll surface that always tries to be in front. The pressing force P of the platen piece
By adjusting the pressing force P2 in relation to the pressing force P2 of the brake plate, the feeding amount of the printing paper A can be adjusted.

FIG. 7 is a perspective view of the printer paper feeding structure of the present invention.

Among the reference numerals in the figures, the same parts as those shown in Figs. 1 to 6 indicate the same parts, and 14 is a flange for fixing printer paper.

(7) Effects of the invention As explained above, according to the invention, in the printer paper roll structure, printing paper is placed on the inside and copy paper is placed on the outside.
In other words, the printed image and copy side of the printing paper is on the inside, and the paper is pulled from the bottom surface of the brake plate.Furthermore, by making the pressing force of the brake plate variable, it is possible to eliminate the misalignment of two sheets of printer paper, and to ensure It is possible to send paper to

[Brief explanation of drawings]

Fig. 1 is a perspective view of an operation panel with a printer function, Fig. 2 is a sectional view taken along the line I-I in Fig. 1, Fig. 3 is a diagram of a printer paper feed structure as a conventional example, and Fig. A in Fig. 4 is a printer section. , Fig. 0 is a partially enlarged view of the brake plate section, Fig. 5 is a diagram of the printer paper feeding structure of the present invention, Fig. 6 A is a partially enlarged view of the printer section, Fig. 0 is a partially enlarged view of the brake plate section, Fig. 7 1 is a perspective view of a printer paper feeding structure according to the present invention. 10; Printer section, 11; Paper feeding piece, 110; Platen piece, 12. 12'; Printer paper, 13; Braking plate, 132; Support bar 131; Spring, 133; Spring support hole.

Claims (1)

[Scope of utility model registration request] In a printer device that incorporates printer paper in the form of a roll for copying, the printer paper is wound with the printing paper on the inside and the copy paper on the outside. A brake plate equipped with a traction mechanism that makes the pressing force variable is provided, and the rotation direction of a paper feeding frame of the printer section and the rotation direction of the printer paper are reversed, so that the printer paper directly pulled out from the lower end of the brake plate is folded back. The configuration is such that it is attached to the printer section,
A printer paper feeding structure characterized in that the braking by the braking plate and the braking in the printer section are applied to the outer copy paper.