JPS6218472Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printed card stain prevention device suitable for implementation in printing machines such as time recorders and time stamps.

Printing machines that use a printing hammer to print type on a printed card can be roughly divided into two types: those that use a tape-shaped printing ribbon interposed between the type and the printed card, and those that use an ink roller. There are two types of printers that print by inserting a printing card after applying ink to the typeface.The former printer, which uses a printing ribbon, has a complicated ribbon feeding mechanism and reversing mechanism, and is difficult to manufacture. On the other hand, printing machines using ink rollers have the advantage that they are very simple in structure and can be manufactured at low cost.

However, since printing machines using ink rollers print by applying ink directly to the typeface, when inserting or removing a printed card, the lowermost edge of the printed card may be affected by the ink-coated type. If you try to solve the above problem by separating the printing card insertion path from the printing surface, it is necessary to make the printing force (engraving force) of the printing hammer quite strong. This caused problems such as failures due to vibration and printing noise. In addition, when applying ink with an ink roller, the ink is also applied to the type located above and below the type set at the printing position, so if the spacing between the type on the type ring is not widened,
There was also a problem where other characters were printed above and below the printed characters.

Therefore, the present invention aims to provide a printing card stain prevention device devised to be used in the above-mentioned ink roller type printing machine and to solve the above-mentioned problems at once. An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In the figure, 1 is a printing hammer that operates for printing by an operating mechanism (not shown) such as a solenoid, and 2 is a support arm rotatably pivoted on one side of the hammer head 1a with a shaft 3. show. Reference numeral 4 denotes a roller shaft attached to the tip of this support arm 2 parallel to the above-mentioned shaft 3. This roller shaft 4 is normally supported by a return spring 5 attached to the support arm 2 and separated from the type wheel 6 1), when the support arm 2 rotates in an arc upward and downward in the drawing about the shaft 3, the type ring set at the printing position (the striking position of the printing hammer 1) is moved during the rotation process. An ink roller 7 capable of applying ink to a typeface (not shown) 6 is rotatably mounted. As the ink roller 7, a cylindrical roller made of cancellous body, rubber, or felt impregnated with ink is usually used, and only the ink roller 7 or the whole including the support arm 2 is configured to be replaceable.

Reference numeral 8 denotes a guide disk rotatably attached to the tip of the roller shaft 4. The guide disk 8, which is formed to have a larger diameter than the ink roller 7, is a guide 9.
It is always located on the insertion path 9a of a printed card 10, such as a time card, which is inserted perpendicularly in the drawing along the drawing, and when the printed card 10 is inserted, it is pushed by this card 10 and the entire support arm 2 is It is designed to rotate in an arc around the shaft 3 against the return spring 5 in the insertion direction of the printed card 10, that is, in the vertical direction in the drawing, as shown in FIG. 1
1 is a card receiving lever protruding above the lower insertion passage 9a of the printed card 10;
is attached to a shift rack 12 that is fed once a day, and determines the insertion amount of the printing card 10, that is, the printing step, and also turns on the switch for the operating mechanism when the printing card 10 is caught. The printing operation can be performed by directing the printing hammer 1 toward the type wheel 6.

In the figure, reference numeral 2a indicates a mounting portion for the return spring 5 provided on the support arm 2, and reference numeral 13 indicates a hammer stopper that engages with the back surface of the printing hammer 1 to prevent the printing hammer 1 from retreating. The arcuate rotation of the support arm 2 by insertion is performed with the printing hammer 1 locked to the stopper 13, so the ink roller 7 rotates in an arc together with the support arm 2. The contact pressure between the outer circumferential surface and the typeface is maintained sufficiently, so that the ink can be evenly and sufficiently applied to the typeface.

Next, reference numeral 14 is a rotating arm whose base end is rotatably attached to a mounting shaft 15 on the side of the fuselage frame (not shown). The dirt prevention plate shown in is attached. The above-mentioned rotating arm 14 provided along one side of the type ring 6 is connected to the insertion path 9 of the printing card 10.
The dirt prevention plate 1 is rotatable up and down along the direction a and is attached to the tip of the rotating arm 14.
6 is a mounting plate 1 that is directly fixed to the rotating arm 14;
6a, and a cover plate 16b which is bent and connected in a substantially L-shape at the tip of the mounting plate 16a so as to cover the peripheral type surface of the type ring 6. A mounting edge 16c is formed on the bottom edge of the cover plate 16b to be placed on the circumferential surface of the guide disk 8 and to support the dirt prevention plate 16 and the rotating arm 14 in their entirety in the lifted state shown in FIG. In addition, a locking edge 16d for a stopper, which will be described later, is formed on the bottom edge of the mounting plate 16a. Also, 16' in the figure
is a printing hole opened approximately in the center of the cover plate 16b, and this printing hole 16' has a size corresponding to one type formed on the type wheel 6, or a plurality of characters printed simultaneously as shown in FIG. It is formed in an oblong shape corresponding to one row of typefaces.

Next, 17 is a stopper provided on the lower rotation range of the dirt prevention plate 16.
As shown in FIG. 2, the stain prevention plate 16 is set so that its printing hole 16' is in the printing position by receiving the locking edge 16d of the stain prevention plate 16 which has been rotated downward together with the guide disk 8. It can be stopped at a position that exactly matches the typeface. Further, 18 is an upper limit stopper of the stain prevention plate 16.

Since the present invention has the configuration as described above, when the printing card 10 is inserted into the device of the present invention which is currently in the state shown in FIG. Then, the entire support arm 2 is rotated downward as shown in Fig. 2 while stretching the return spring 5, and during this rotation process, the ink roller 7 comes into contact with the type surface set at the printing position and applies ink. do. Also, when the guide disk 8 is rotated downward as described above, this guide disk 8
The dirt prevention plate 16 placed above is also rotated downwards around the mounting shaft 15 of the rotating arm 14, and is then stopped by a stopper 17 as shown in FIG. The type surface immediately after being coated with ink is covered to prevent the inserted printed card 10 from coming into contact with the type surface. When the printed card 10 is inserted further from the state shown in FIG. 2, the card receiving lever 11 provided below
receives the lower end of the printing card 10 and determines the printing stage, and furthermore, an operating mechanism works to direct the printing hammer 1 toward the ink-coated printing surface that is visible in the printing hole 16' of the stain prevention plate 16 to print. Activate it,
Predetermined characters can be stamped in a predetermined field of the print card 10.

When the above printing is completed and the operating mechanism is deenergized,
The printing hammer 1 automatically returns to the state shown in FIG. 1 or 2 under the pulling action of the return spring 5, and then when the printing card 10 is pulled upward,
As shown in the figure, the lifting action of the guide disk 8 whose circumferential surface is in pressure contact with the surface of the printed card 10 and the pulling action of the return spring 5 combine to move the entire support arm 2 and the entire dirt prevention plate 16 to the upper limit stop. 18 and automatically returns to the original position shown in FIG. 1, thus completing one printing operation.

Therefore, according to the stain prevention device of the present invention, the stain prevention plate covers the type surface coated with ink by the ink roller during printing, that is, when inserting the print card, so that the print card insertion path is protected from the print surface. Even if it is placed close to the surface, there is no need to worry about the printed card coming into contact with the typed surface when it is inserted or pulled out and get dirty.Also, since the printed card and the typed surface can be placed close to each other, the printing force of the printing hammer can be maximized. This design simplifies the operating mechanism and prevents printing noise, and the low printing force minimizes distortion of the printed card during printing, resulting in stable printing clarity. It can also take advantage of the following advantages.

In addition, according to the present invention, since the structure is such that only the characters that are visible through the printing holes drilled in the stain prevention plate are printed, the ink applied by the ink roller is not applied to the characters above and below the characters to be printed. However, when printing by stamping with a printing hammer, there is no need to worry about the upper and lower characters being printed all at once, and therefore,
By narrowing the distance between each type on the circumference of the type wheel, it becomes possible to form a large number of type on one type wheel.
In addition, it can also provide practical effects such as the ability to reduce the diameter of the type ring, and is particularly useful for printing machines configured to use a guide disk as shown in the figure to carry out the coating motion of the ink roller. Therefore, it is suitable for 洵.

[Brief explanation of the drawing]

The drawings are examples, and Fig. 1 is a partially sectional front view showing an ink roller type printing machine equipped with the present invention before operation, and Fig. 2 shows a state when a printing card is inserted. A partially sectional front view showing the operating state,
3 is a plan view of the main part of FIG. 1, and FIG. 4 is a side view of the stain prevention plate. 1... Printing hammer, 2... Support arm, 5...
... Return spring, 6 ... Type ring, 7 ... Ink roller, 8 ... Guide disk, 10 ... Printing card, 14 ... Rotating arm, 15 ... Mounting shaft, 16
... Dirt prevention plate, 16'... Print hole, 17... Stopper.

Claims (1)

[Scope of utility model registration request] When a printed card is inserted and the guide disk is pushed, the guide disk and ink roller, which are coaxially attached, rotate together in the direction of insertion of the printed card against the return spring, and during this rotation process, the ink roller In a printing machine configured to apply ink to the type surface set at the printing position, the type surface is covered with the tip of a rotating arm whose base end is rotatably attached to the machine body. At the same time, a stain prevention plate with a printing hole of a size equivalent to one printing type or one row of printing type is bored in the approximate center of the plate, and this stain prevention plate is attached to the circumferential surface of the guide disk. On the other hand, on the underside of the stain prevention plate, a stain prevention plate that rotates downward as the guide disk rotates is placed so that the printing holes are exactly on the type surface set at the printing position. A device for preventing dirt on a printed card in a printing machine, characterized in that a stopper is provided to prevent the printed card from being stained so as to match the stopper.