JPS5855913B2 - imprint device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an imprint device that is built into, for example, a cash dispensing machine or a cash deposit machine and that imprints an embossed code attached to a card onto paper.

In the conventional imprint apparatus, as shown in FIGS. 1 and 2, biasing compression springs 2 are disposed at the front and rear positions in the lower part of the imprint table 1.
The card 3 and the paper 4 are placed on top of each other on the top surface of the imprint table 1, and the platen roller 5 rolls on the top surface and moves along the fixed guide grooves 6, 6. At this time, the spring 2 The embossed code for the card 3 can be imprinted on the paper 4 by applying pressure from...

In this configuration, the platen roller 5 and the biasing spring 2
During imprinting, the imprint pressure is low at both ends of the imprint table 1 (in the direction of movement of the platen roller 5) and high at the center. There is a change in the imprint pressure, and the platen roller 5 moves on a constant plane due to the function of the fixed guide groove 6.
When the imprint table 1 receives a pressing force from above, the platen roller 5 moves in the width direction (second direction) against the moving surface of the platen roller 5.
There are problems such as tilting of the surface (see figure).

For this reason, conventional imprint apparatuses have a drawback in that the sharpness of prints varies during imprinting.

Therefore, an object of the present invention is to provide an imprint apparatus that can deal with the above-mentioned problems.

In the imprinting apparatus of the present invention, the moving surface of the platen roller can always remain parallel to the imprinting surface during any movement due to the action of the parallel link mechanism and the fixed guide groove. The biasing spring force that applies printing pressure is transmitted to the platen roller via a parallel link mechanism, so that the imprint pressure during imprinting can always be applied to the card and paper at a constant pressure at any position. There is no variation in print density, and a constant density and clarity can be obtained.

An embodiment of this invention having such characteristics will be described in the third embodiment below.
This will be explained in detail based on the drawings shown in FIGS.

The drawing shows an imprint device 11.

The front and rear pair of parallel link mechanisms 11.11 are connected to the upper rod 12.1.
2 and lower rods 13, 13.

One end of the upper rods 12, 12 is connected to a support shaft 15 provided on the front and rear walls of a box-shaped cylindrical movable frame 14, and the other end is connected to tongue pieces 17, 17 provided on a fixed wall 16. Support pin 1
8.18, and the lower rods 13, 13 have one end connected to a support shaft 19 installed on the front and rear walls of the movable frame 14, and the intermediate portion thereof is connected to the fixed wall 1 by a support pin 20.20.
It is supported by tongue pieces 21.21 provided at 6.

The aforementioned lower rods 13, 13 are set to have a length that allows them to pass through the fixed wall 16, and therefore the fixed wall 16 is provided with a hole 22, 22 that is larger than the cross section of the lower rods 13, 13.
3 and 13 are inserted.

The stopper 23° 23 provided on the fixed wall 16 is a position regulating stopper for regulating the lower limit position of the platen roller 25, which will be described later.
This stopper 23.23 is formed by an adjusting screw 24.24 and can be adjusted in small amounts.

Imprint biasing springs 25, 25 are locked to the other ends of the lower rods 13, 13, and the lower rods 13,
13 is pressed against the stopper 23.23.

The platen roller 26 is connected to a notched groove 2 formed at both ends of the swinging rods 28, 28 at the lower ends thereof via a roller shaft 27.
It is inserted into 9,29.

The upper ends of the swinging rods 28, 28 are pivotally supported by a support shaft 30 provided on the fixed wall 16.

One end of the connecting rod 31 is connected to the connecting pin 3 in the middle of the swinging rod 28.
2, and the other end is connected to an eccentric position of the crank plate 33 by a connecting pin 34.

The rotation of the above-mentioned crank plate 33 is controlled by an appropriate motor.

A fixed guide groove 35.35 is formed in the inner wall surface of the movable frame 14, which faces the roller shaft 2γ, and this fixed guide groove 35.35 has a relief part at both ends and a middle part. and a linear imprint portion, and the aforementioned roller shaft 27 is fitted into this groove 35,35.

An imprint table 38 on which cards 36 and journal paper 37 are placed is fixed to the fixed wall 16.

When the card 36 is conveyed to the imprint apparatus 10 configured as described above and placed on the imprint table 38 together with the journal paper 37, the cards 36 are
．． The platen roller 26 impregnated with ink and applying a predetermined imprint pressure moves while rolling on the upper surface of the card 37, so that the embossed code attached to the card 36 can be imprinted on the journal paper 37.

This imprinting operation moves the platen roller 26 held by the swinging rod 28 by transmitting the rotation control of the crank plate 330 to the swinging rod 28 via the connecting rod 31.

The platen roller 26 can be moved on the imprint surface by the fixed guide groove 35.

The imprint pressure also applies the biasing force of the biasing springs 25 and 25 engaged with the lower rods 13, 13 to the parallel link mechanism 11.
．． 11 to the movable frame 14, and fixed guide groove 3.
5.35 to the platen roller 26 so that the platen roller 26 presses onto the imprint surface with the set pressure of the biasing spring 25.25.

At this time, due to the action of the parallel link mechanism 11.11, the imprint pressure does not change no matter which position the platen roller 26 moves on the imprint table 38.

As a result, it is possible to print with constant density and sharpness without variation.

As a similar embodiment, the compression spring for imprint pressure biasing may be a torsion coil spring, and the spring may directly guide the guide instead of biasing the parallel linkage.

[Brief explanation of drawings]

The drawings show a conventional embodiment and an embodiment of the imprint apparatus of the present invention, in which FIG. 1 is a front sectional view of the conventional imprint apparatus, FIG. 2 is a side sectional view of the conventional imprint apparatus, and FIG. 3 is a side sectional view of the conventional imprint apparatus. The figure is a front sectional view of the imprint apparatus of the invention, and FIG. 4 is a side sectional view of the imprint apparatus of the invention. DESCRIPTION OF SYMBOLS 10... Imprint device, 11... Parallel link mechanism, 15... Support shaft, 16... Fixed wall, 19... Support shaft, 25... Biasing spring, 26... Platen roller,
35...Fixed guide groove.

Claims (1)

[Scope of Claims] 1. In an imprinting device that performs imprinting by rolling a platen roller while being guided by a guide, one end is arranged on the guide and the other end is arranged on a fixed wall, and each shaft is parallel to the imprint surface. a pivoted parallel link mechanism; and a spring that biases the parallel link mechanism or the guide toward the imprint surface, and is configured to move the guide parallel to the imprint direction; An imprint apparatus characterized in that the spring is configured to apply imprint pressure.