JPS6221634B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal printing device built into, for example, an automatic ticket vending machine, automatic ticket gate, etc.

In conventional thermal printing devices, a roll of thermal paper is pressed against the heat generating part of a thermal head using a pressure roller, or the pressure roller is left in a detached state before printing, and the pressure roller is pressed during printing to press the thermal head. There are methods in which the thermal head is brought into pressure contact with the heat-generating part, or in which the thermal head is brought into contact with and separated from the thermal paper. However, when cards are cut into card-like sizes, such as train tickets, the heat generated during printing causes the edges of the cards to curl up or become deformed, resulting in clogging in the device.

Therefore, as a means to prevent such card jams, there is a demand for a device in which the card path is set large, the thermal head section and the pressing member are separated in advance, and both are activated only during printing to press the thermal paper into contact. It had been.

The present invention has been made in view of the above-mentioned points, and its purpose is to enable reliable printing without causing card jams during transportation in a device that prints on card-like thermal paper. The purpose is to provide a thermal printing device with a simple structure and low cost.

The present invention will be explained below based on an embodiment shown in FIGS. 1 to 4A and 4B. FIG. 1 shows a heat-sensitive recording member used in a heat-sensitive printing device, such as a heat-sensitive ticket.This heat-sensitive ticket 1 includes a heat-sensitive layer 1b on one side of a card-like support 1a made of paper or a synthetic resin material. The magnetic recording layer 1c is supported on the other surface.

FIG. 2 shows a schematic diagram of a thermal printing device, and in the figure, reference numerals 11 and 11 indicate two pairs of upper and lower conveyor belts that grip and convey the thermal ticket 1 in the direction of the arrow x;
A detector 2 is provided on the carry-in side to detect the tip of the heat-sensitive ticket 1, and is composed of a light emitting diode 13 and a photoelectric conversion element 14.

Further, 15 is a thermal head for printing information provided in the middle of the conveyance path for conveying the thermal ticket 1, and 16 is a pressing pad disposed opposite to the thermal head 15.
The pressing pad 16 is connected to a rotary solenoid 17 as a driving source, and by driving the rotary solenoid 17, the thermal head 15 and the pressing pad 16 approach each other, and hold the thermal ticket 1 on the conveyance path for a certain period of time. Information is displayed in color on the heat-sensitive ticket 1. That is, sliders 18 and 18 are fixed to the thermal head 15 and the pressing pad 16, respectively.
The grooved bearings 20, 20, 20 are in sliding contact with each other and are configured to move up and down smoothly. Incidentally, reference numerals 21 and 21 are springs that are tensioned on the sliders 18 and 18, and the thermal head 15 and the pressing pad 16 are normally kept apart from the conveyance path.

Furthermore, as shown in FIG. 3, slide blocks 25a and 25b are attached to the rear surfaces of the sliders 18 and 18, respectively, and a shaft 23 having rotatable rollers 22 and 22 at the ends thereof is attached.
is fixed, while the rotary solenoid 17
A cam plate 24 is provided with an engaging piece 24b on the shaft.
The rollers 22, 22 are respectively engaged with the engaging pieces 24a, 24b of the cam plate 24, and by rotating the plate 24 as a cam mechanism, the bearings 20,
The shaft 23 is configured to move up and down via the shafts 20, 20.

Engagement pieces 24a, 24b of the cam plate 24
The relationship between the slide blocks 25a and 25b is constructed as shown in FIGS. 4A and 4B. That is, when the thermal head 15 and the pressing pad 16 are separated, the cam plate 24 is inclined at an angle of θ (for example, 30 degrees) from the reference line C as shown in FIG. 4A, and the engagement of the cam plate 24 is Piece 24a, 2
The distance between the centers of the rollers 22, 22 engaged with the thermal head 15 and the pressing pad 16 are located at a standby position with a distance of _H1 between the centers.

On the other hand, when the rotary solenoid 17 operates and the cam plate 24 rotates in the direction of the arrow (counterclockwise), the engaging pieces 24a, 2 of the cam plate 24 rotate.
The rollers 22, 22 engaged with the rollers 4b are pressed against the biasing force of the springs 21, 21, and the distance between the centers of the rollers 22, 22 becomes H ₂ (<H ₁ ). As the rollers 22 and 22 move, the thermal head 15 and the pressing pad 16 attached to the slide blocks 25a and 25b move so as to collide with each other, clamping the thermal ticket 1 and printing it at the printing position. Note that when the pressure is released, the sliders 18, 18 are separated by springs 21, 21, each having one end attached to the sliders 18, 18.

Further, the middle part of the cam plate 24 is fixed to the rotating shaft 17a of the rotary solenoid 17.
The rotary solenoid 17 is attached to the solenoid holder 26
It is attached to the board 19 via.

As a result, the engaging piece 24 of the cam plate 24
The slide blocks 25a, 25b move against the tension of the springs 21, 21 via the rollers 22, 22 engaged with the slide shaft 2.
7. The sliders 18 and 1 are moved by the reciprocating motion of the slide blocks 25a and 25b.
The thermal head 15 and the press pad 16 attached via the heat sensitive ticket 8 are moved toward and away from the thermal ticket 1.

Therefore, by driving the rotary solenoid 17, the sliders 18, 18 approach each other, and the integrally attached thermal head 15
And the pressure pad 16 can hold the thermal ticket 1.

The structure of the thermal head incorporated in the thermal printing apparatus of the present invention may be any one of character pattern type, segment type, thick film type, thin film type, metal plate type, and hot plate type. Furthermore, in the above-described embodiment, the heat-sensitive ticket is conveyed by being held between belts, but the method is not limited to this. For example, the heat-sensitive ticket may be conveyed by being held between rollers. Furthermore, printing control is not limited to the case where the thermal ticket is temporarily stopped.

Further, the heat-sensitive recording member used in the present invention is not particularly limited to the heat-sensitive ticket shown in one embodiment, and it goes without saying that various types can be used.

As explained above, according to the present invention, the transported heat-sensitive recording member can be prevented from clogging.
It is possible to print reliably by being stopped at the printing position, and the mechanism can be simplified, resulting in excellent economical effects.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a heat-sensitive recording member, FIG. 2 is a schematic perspective view of a thermal printing device showing an embodiment of the present invention, FIG. 3 is a vertical side view of the printing device, and FIG.
B is a front view showing the operating state of each cam plate. 1... Heat-sensitive ticket (thermal recording member), 11... Conveyance belt (conveyance means), 15... Thermal head, 16
...Press pad (pressing means), 17...Rotary solenoid, 18...Slider, 21...Spring, 2
2...Roller, 23...Shaft, 24...Camshaft (shaft), 24a, 24b...Engagement piece, 25
a, 25b...slide block, 27...slide shaft.

Claims (1)

[Scope of Claims] 1. 2 parts stretched in parallel with a predetermined interval in order to sandwich and transport both ends of the heat-sensitive recording member, respectively.
a pair of conveyor belts, and a vertically movable thermal head that is provided on a conveyance path constituted by these conveyor belts and prints information on a portion of the heat-sensitive recording member that is not held by the conveyor belts. , a pressing means disposed opposite to the thermal head and capable of vertical movement for pressing the heat-sensitive recording member toward the thermal head; a slide mechanism for moving each of the thermal heads and the pressing means, a shaft coupled to each of the thermal head and the pressing means, rollers rotatably supported by each of these shafts, and a plate provided with an engagement piece that engages with these rollers. A thermal printing device comprising: a rotary solenoid coupled to the plate in a surface direction to drive the plate;