JPS6021249Y2 - Double printing prevention device for open imprinter - Google Patents

Description

[Detailed explanation of the invention] (Purpose) This invention relates to a double printing prevention device in an open type imprinter, and the main purpose of the invention is to control the movement of the printing roller for printing by rotating the operation unit. The movement allows only the outbound trip to be interlocked, and the return trip disables the rotation of the operating section.
To simplify the structure of a device for preventing double printing occurring on the return path by moving the printing roller by the opening movement of the print head and making it non-contact with the slip.

(Structure) Next, the structure of the embodiment of the present invention will be described. 1 is a printing base of an imprinter, a printing plate 2 is provided on the upper surface of the base, and a printing head 3 is provided at the end. It is supported so as to be swingable around a pivot 4.

. The printing head 3 is connected to a head machine frame 7 consisting of two frame plates perpendicular to the plate bed 2 and parallel to each other by the pivot shaft 4 and another shaft part 5.6, and two frames of the head machine frame. When the machine frame is placed face down on the plate stand 2, the plate plate 2
A printing roller 9 is movably fitted in a groove 8 substantially parallel to the upper surface, and is swingably supported by a shaft 6 above the machine frame 7, and has a lower end that is connected to the printing roller 9. The drive lever 10 is formed with a single engagement portion that engages only from one side.
One arm, which is pivotally attached to the shaft portion 5 and bent into an L shape, is made to protrude outside the machine frame, an operating portion 11 is provided at the end, and the other arm is connected to the drive lever 10 and the link 12 via the drive lever 10 and the link 12. The drive lever 10 is separated from the operating lever 13 to which it is connected, and the drive lever 10 is fitted with a spring 14, one end of which is locked at an appropriate location on the machine frame 7, and the other end of the spring 14 is attached to the other end of the spring 14. It is biased so that it can be rotated to a convenient position for starting printing in step 9.

The print head 3 has an operating section 11 of the operating lever 13.
A cover 15 made of sheet metal or plastic is attached to the cover 15, which covers the entire body from above, and has a cutout portion so as to expose the body to the outside.

(Function) Next, the function of the present invention will be described. As shown in FIG. Then, as shown in FIG. 1, lower the print head 3 onto the plate stand 2 again, and
1 is pushed down as shown by the arrow against the action of the spring 14, the drive lever 10 is rotated counterclockwise via the link 12, and the lower end of the lever is moved by the printing roller 9 into the groove 8 of the machine frame 7. The printing process is performed by moving the inside to the right.

(See Figure 2) When the printing roller 9 is moved to the right, the slip 17 placed on the printing plate 2 receives the pressing action from above the printing roller 9, and the customer placed on the lower side receives the pressing action from above. A version of card 16 is printed.

When printing is finished, when you release your hand from the operating unit 11, the operating lever 13 is raised by the action of the spring 14, and the link 12 connected to the end and the drive lever 10 are automatically returned to the printing starting position, and the return process is completed. It will be done.

However, since the printing roller 9 is not affected by the drive lever 10 on the return path, it remains at the printing end position.

(See Fig. 3) Next, in order to remove the slip 17 and the customer card 16 from the printing table 2, the printer is operated in conjunction with the operation of lifting the print head 3 in the opposite direction of the arrow (Fig. 1) via the operation section 11. Since the frame 7 and the groove 8 are inclined, the printing roller 9 fitted in the groove 8 is slid by its own weight toward the pivot 4 of the print head 3 and returned to its original position.

When the print head 3 is opened upward, printed slips and customer cards can be easily removed from the plate base 2.

(Effects) As described above, in this invention, the printing roller presses against the slip only when the operating section is pressed downward for printing, and when the operating section returns to its original position, the operating section and drive Only the lever returns and the print roller stops at the print end position, and when the print head is lifted up in conjunction with the removal of slips and cards, it returns to its original position, completely preventing double printing. The structure is simple,
Moreover, the operation is extremely simple, as it is possible to prevent double printing and set and remove slips by simply performing the natural movements for printing, that is, without special operations to prevent double printing. It has a rational structure and can be operated, and has great practical effects.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention. Figure 1 is a side view showing the state of the invention before printing, Figure 2 is a side view showing the state of the invention after printing, and Figure 3 is a side view showing the state of the invention before printing. Fig. 4 is a side view showing the state in which the operator's hand is removed from the operating unit after printing is completed, Fig. 4 is a side view showing the print head of the invention in a state where the machine frame is tilted, and Fig. 5 is a side view showing the state in which the print head of the invention is lifted and the machine frame is tilted. It is a side view showing a state in which the print head is opened, and 3 is the print head, 9 is a print roller, 10 is a drive lever, and 13 is an operating section.

Claims (1)

[Scope of utility model registration request] A printing base having a printing plate on its upper surface, a printing head pivotally attached to an end of the base so as to be openable and closable, and a printing head movably supported by a machine frame inside the head and placed on the printing plate. In an open type imprinter comprising a printing roller that presses a slip, and an operation unit that is pivotally mounted to a machine frame within the print head to move the print roller, the printing process is carried out within the machine frame of the print head. and a link which is pivotably mounted so as to be able to swing during the return stroke, is always biased toward the printing start position by the action of a spring, and is rotated against the action of the spring by the action of the operating section. A drive lever is connected to the operating section via a drive lever, which engages the printing roller from only one side during the printing process, and is formed with a single engagement part that separates from the printing roller during the return process. A device for preventing double printing of an open type imprinter, which is characterized by being equipped with the device.