JPH02269053A - Thermal printing mechanism for marking machine - Google Patents

Abstract

PURPOSE:To miniaturize a heater by moving a carbon mask upward so that it abuts on a printed matter through a carbon tape owing to the lowering of a printing ring and moves toward the printing ring. CONSTITUTION:When a ring shaft 3 is lowered to drop a printing ring 1, a carbon mask 31 is elevated relatively with respect to the printing ring 1 while it is abutting on a printed matter 5 through a carbon tape 4. When the top hole position of the supporting bar part of the carbon mask 31 rises, a carbon mask spring 32 rotates to lower a printing chip 15 through an energizing pin 34. Consequently, a printing part of the heated printing chip 15 pressure-abuts on the surface of the printed matter 5 through the carbon tape 4 to perform thermal printing. Thus, a heater can be miniaturized.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention performs thermal printing by selecting a desired print and extruding the print onto a printing object such as a tube, sheet, or plate. The present invention relates to a thermal printing mechanism of a hand-held marking machine.

[Prior Art] Conventionally, the printing mechanism of a marking machine that prints on a tube-shaped, plate-shaped, etc. object to be printed has been to permanently engrave characters and codes on the outer periphery of a printing ring, and arrange a plurality of them adjacently. The print ring is then rotated to thermally print the selected material on the printed material. At this time, the entire printing chip must be heated with an electric heater, which requires a heating device, temperature sensor, transformer, etc. Therefore, it is difficult to make the heating device smaller and lighter.Therefore, the printing mechanism of the conventional marking machine requires multiple printing rings, and the heating device cannot be made smaller. Another drawback is that the heating device consumes a lot of power.

[Invention or Problem to be Solved] Therefore, the present invention eliminates the drawbacks of the prior art and provides a heating device that enables thermal printing of arbitrary rows and columns with only the desired printing by a single printing ring. The purpose of the present invention is to develop a printing system for a marking machine that can be made compact and significantly reduce the power consumption of a heating device.

[Means for Solving the Problems] In order to achieve the above object, the first aspect of the present invention is to provide a ring shaft that can be attached to a marking machine and to which a frame can be attached, and a print holder guide. a frame into which printing is fitted; a character plate disposed on the front surface of the frame and displaying the printing in a selectable manner; a positioning cover configured to rotate the frame and fix it in a predetermined position; and the ring. It consists of a carbon mask disposed on a shaft so as to be movable up and down, and as the carbon mask moves, it is formed so that thermal printing can be performed on an arbitrary printing target member with carbon through the carbon mask by one printing selected.

Second, the print that expresses arbitrary characters, codes, etc. is stored in a print holder, connected to a conductive bar, and further fitted into a print holder guide, and conductive when stopped at a printable position and the print is It is heatable and is formed so that thermal printing can be performed on the printing target member during the printing.

[Function] In the thermal printing system of the marking machine configured as described above, when the printing ring descends, the carbon mask contacts the printed object via the carbon tape and moves upward to approach the printing ring. Therefore, using this movement, the selected printing chips in the printing ring are lowered, and the printing chips are heated by the ceramic heater from the time of sorting, and the printing chips are pressed against the carbon tape. Thermal printing is performed on the printing target located below.

[Example] In order to further clarify the gist of the present invention, an example will be described with reference to the drawings.

As shown in FIGS. 1 to 5, the printing ring 1 is rotatable around the cylindrical portion 37 of the ring shaft 3, and 50 holder guides 11 are arranged on the outer circumferential side of the printing ring l. It is fitted into the frame 16 of l,
A print holder 12 is slidably fitted into each holder guide 11, and a print chip 15 is fitted into the tip of each print holder 12. On the other hand, a current-carrying holder 33 is attached to the lower part of the ring shaft 3, and a carbon When the mask 31 is moved up and down, the carbon mask spring 321 is selected and stopped at the printing position via the energizing pin 34, and electricity is applied to heat the printing chip 15 to a predetermined temperature and saturate it, and in this state, the printing holder 12 is moved downward. The carbon tape 4 is slid over the carbon tape 4 to perform thermal printing.

Inside the printing holder 12, a printing chip 15 formed in the shape of a flat plate and having heater and thermo function is located on the tip side of the printing chip 15, which is made of ceramic material whose main components are barium titanate and a small amount of lanthanum oxide-based material. The printed portion 15a of the printing chip 15 for characters, symbols, etc. is exposed to the print holder guide,
Next, a flat ceramic heater 14 is positioned adjacent to the inside of the printing chip 15, and one end of a pair of conductive holder energizing bars 13 is connected to each of the pair of electrodes 14a and 14b of the flat ceramic heater 14. The other end is exposed to the outside through two holes in the print holder 12.

Next, the current-carrying holder 33 has two cylindrical parts 33a.

33b, and a current-carrying pin 3 is provided in the cylindrical portion 33a.
4 is supported by a cylindrical coil spring 35 and inserted,
The inner lower end of the cylindrical portion 33a is tapered to prevent the spring 34 from falling while allowing the lower part of the energizing pin 34 to descend. The current-carrying pin 34 is an electrical insulator, and the lower ends of two conductors (not shown) installed vertically penetrating inside the pin 34 are always connected to the other ends of the pair of holder current-carrying bars 13. They come into contact and are electrically connected, and the upper ends of the two conductors are connected to an AC current of 1 by wiring (not shown).
Connected to 00v power supply. Further, the spring 35 functions to return the lowered energizing pin 34 to its original position.

Next, the support rod part of the carbon mask 31 is inserted into the other cylindrical part 33b of the energizing holder 33, one end of the coiled carbon mask spring 32 is inserted into the hole at the top, and the other end is connected to the energizing pin. The carbon mask spring 32 is inserted into a hole (not shown) at the upper end of the carbon mask spring 34, and the center of the carbon mask spring 32 is rotatably supported by the ring shaft 3.

Next, a carbon mask 31 is placed above the printing object 5 with the carbon tape 4 interposed therebetween.

Further, 2 is a ring lock, and 21 is a tightening screw, which fixes the printing ring 1 to the ring shaft 3 in a rotatable state, 41 is a tape holder for the carbon tape 4, and 42 is a tightening screw for the carbon tape 4. It is a tape feed roller.

With the above configuration, when the printing ring 1 is arbitrarily rotated and the frame 16 is rotated and stopped at the position of the character or symbol to be printed displayed on the character plate 17, the printing holder equipped with the printing chip 15 is attached. 12 is moved to the printing position above the carbon maskco 1, and the ceramic heater
An AC voltage of 100 V is applied to the ceramic heater 14, and the printing chip 15 is heated at a predetermined temperature determined by the characteristics of the ceramic heater 14 itself.

Next, when the printing ring 1 is lowered by lowering the ring shaft 3, the carbon mask 31 is in contact with the printing object 5 via the carbon tape 4, and the carbon is removed relative to the printing ring l. When the mask 31 is raised and the upper end hole position of the support rod portion of the carbon mask 31 is raised, the carbon mask spring 32 rotates and lowers the printing chip 15 via the energizing pin 34. As a result, the heated printing chip 15 The printing portion 15a presses against the surface of the printing object 5 via the carbon tape 4 to perform thermal printing.

Next, after thermal printing is completed, when the ring shaft 3 is raised, the printing ring 1 is raised, and as a result, the carbon mask 31
is lowered relative to the printing ring l, the energizing pin 34 is raised via the carbon mask spring 32, and the printing holder 12 is raised by the contraction force of the elongated coil spring 36.

After one thermal printing process is completed in this way, the relative position of the ring shaft 3 and the printed matter 5 is adjusted by rotating the frame 16 as described above, and the ring shaft 3 and the printed matter 5 are stopped at the desired position on the character plate 17. By doing so, the next thermal printing can be performed.

[Effects of the Invention] Since the present invention is configured as described above, it produces effects as described below.

Since the thermal printing mechanism of the marking machine of the present invention is composed of a single printing ring, by rotating this ring, it is possible to easily select the character or symbol 1 to be thermally printed, and the printing chip of the selected character or symbol can be easily selected. By stopping the carbon at a predetermined display position, the ceramic heater heats the carbon to a predetermined temperature with extremely low power, and further saturates the print ring. Since thermal printing can be easily performed directly on the surface of the printed object in arbitrary rows and columns through the tape, the printing pressure remains constant regardless of the thickness of the printed object.

In addition, since thermal printing is possible by - printing, it is easy to print the same characters or symbols in rows.

Further, since the use of a ceramic heater eliminates the need for an attached electric member, the heating device can be made extremely compact, and the entire device can be made compact and handy.

As described above, the present invention is extremely excellent in practical terms.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a cross-sectional view, FIG. 2 is a perspective view of the main parts of the device when the ring lock is disassembled and viewed from the front of the device, and FIG. 3 is a cross-sectional view. A- in Figure 2
A partially cutaway perspective view showing the main parts as viewed from line A, Fig. 4 is a perspective view showing the main parts inside the print holder in an assembled state, and Fig. 5 shows the main parts in the state when assembled to a marking machine. FIG. 1-m-printing ring 12-m-printing holder 14-m-ceramic heater 15-11 printing chip 16--frame 31-m-carbon mask 32-m-carbon mask spring 34-m-current-carrying pin 4- m-carbon tape 5-m-printed matter figure figure figure

Claims (2)

[Claims] (1) A ring shaft that can be attached to a marking machine and to which a frame can be attached, a frame with a print holder guide attached and a print fitted thereto, and a print selected by placing it on the front of the frame. It consists of a character plate that can be displayed, a positioning cover that is designed to rotate the frame and fix it in a predetermined position, and a carbon mask that is arranged to be movable up and down on the ring shaft. A thermal printing mechanism for a marking machine, characterized in that the thermal printing mechanism of a marking machine is formed so that thermal printing can be performed on an arbitrary printing target member with carbon via a carbon mask by one printing selected as the marking machine moves. (2) A print that displays any character, code, etc. is stored in a print holder, connected to a conductive bar, and further fitted into a print holder guide, and when stopped at a printable position, conducts and heats the print. 1. A thermal printing mechanism for a marking machine, characterized in that the thermal printing mechanism is formed to enable thermal printing on a printed member.