JPS5896579A - Paper thickeness regulating mechanism for line printer - Google Patents

Abstract

PURPOSE:To regulate the aperture between a printing belt and a printing hammer according to the thickness of a printing paper by eliminating the bias of the printing hammer by using a simple structure in which a type unit is provided to a movable frame, and the printing hammer is allowed to come near or separated from the printing unit by utilizing an eccentric cam. CONSTITUTION:A movable frame 12 consists of a basal base 14 and a moving base 15, and an eccentric cam 16 is interposed between a projected edge 17 located on the opposite side of a printing unit 7 and the side edge 18 of the moving base 15. A spring 19 always presses the moving base 15 on the projected edge 17 side. The type unit 3 consists of a type belt 1, a drive pulley 2, and a platen 20. The eccentric cam 16 is turned by an operating knob 21, the moving base 15 is moved back and forth toward the directions of G and H, and the type unit 3 is allowed to come near or separated from the printing unit 7. The aperture between the type 22 of the type belt 1 and the printing hammer 6 is regulated without causing piece contact.

Description

Detailed Description of the Invention α) Technical Field of the Invention The present invention relates to a paper thickness adjustment method for adjusting the distance between the type characters on a type belt and the printing hammer in accordance with the thickness of the printing paper in a swing gate type line printer device. Regarding the mechanism.

■ Background of the technology Impact-type line printers run an ink ribbon and printing paper between the printing surface of the printing belt and the striking surface of the printing hammer, and then hit the printing paper with the printing hammer. When printing is performed, if the thickness of the printing paper becomes large, the printing paper cannot be held between the type and the printing hammer, and the running condition of the printing paper may be affected by this. Therefore, it is necessary to increase the distance between the type bell) O type and the printing hammer in accordance with the thickness of the printing paper.

0) Prior Art and Problems As shown in Fig. 1, the paper thickness W* mechanism of the conventional line printer device has a printing magnet 4 for a printing unit 3 consisting of a combination of a printing belt 1 and a drive pulley 2%. The printing unit 1 consisting of a combination of a connecting rod 5 and a printing hammer 6 is rotated in the direction of the arrow B about the fulcrum 8 of the paper section to adjust the gap between the printing belt 1 and the printing hammer 6. or 1 type unit) 3 as shown in Figure 2.
7 was moved back and forth in the direction of arrow C1D. However, in any of the above cases, -
The printing unit I, which has printing magnets 4 corresponding to the number of row digits (for example, 13641), connecting rods 5, and printing hammers 6, is heavy, and it is difficult to rotate or move the heavy printing unit 1 back and forth. In the ninth place, the corresponding printing number is 22)
The rigidity of the entire 7 had to be increased, and its movement mechanism was also complicated. In the conventional example of trench 9, Figure 1,
When the printing unit 7 is rotated about the fulcrum 8 at the bottom, the striking surface of the printing hammer 5 is no longer parallel to the printing surface of the printing belt 1 at the top and bottom, resulting in a so-called one-sided contact condition. There are 6 or 9 cases where the print finish cannot be obtained.

0) Purpose of the Invention The present invention has been made in response to the above-mentioned circumstances, and it has a simple structure, eliminates the one-sided roll of the printing hammer on the type surface, and allows the type characters on the type belt to correspond to the thickness of the printing paper. It is an object of the present invention to provide a paper thickness adjustment mechanism for a line printer device that can reduce the gap between the printing hammer and the printing hammer.

(5) Structure and object of the invention According to the present invention, a printing unit consisting of a combination of a printing magnet, a connecting rod, and a printing handle i is provided on a fixed seven trays, and a printing belt and a driving pulley are provided on a movable frame. and a platen, and one end of the seven movable frames is rotatably pivoted to one end of the fixed frame, and the wrinkly frame is arranged in a fan-shaped KI! In a swing gate type line printer device that can be closed, the type unit is movable relative to the movable frame, and an eccentric cam is mounted on the movable frame, and the eccentric cam is operated to print the type unit. This is achieved by providing a paper thickness adjustment mechanism for a line printer device, which is characterized in that the gap between the printing characters on the printing belt and the printing hammer is adjusted by moving them toward or away from the unit side.

(6) Embodiments of the Invention Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figures 3 and N4 are drawings showing a first embodiment of the paper thickness 14 adjusting mechanism according to the present invention 8A&C. In FIG. 3, the fixed frame 11 has a printing magnet 4 and a series 1iaci.
A printing unit 7 consisting of a combination of a pad 5 and a printing hammer 6 is provided.

As shown in FIG. 4, one side end of a movable frame 12 is rotatably attached to one end of the fixed frame 11 by -18, and the frame 12 is attached to the shaft 13.
It can be opened and closed in a fan shape in the direction of arrow E%F with the center at .

As shown in FIG. 3, the movable frame 12 includes a base base 14 located below and a movable base 15 located above the base base 14 and movable relative to the cough base pace 14. An eccentric cam 16 is interposed between the projecting edge 1T of the base base 14 located on the opposite side of the printing unit T and the moving base 1io negative I#18, and the moving base 15 is always supported by the spring 11. The proximal base 14 is biased toward the protruding edge 11 side. On the upper surface of the moving base 15, as shown in FIG. 4, there is provided a type unit 3 consisting of a combination of a type belt 1, a drive pulley 2, and a platen 20. Therefore, when the tip of the eccentric cam 16 is turned and the next operation knob 21 is rotated, the eccentric cam 1 rotates, and due to the cam action, the movable base 15 is moved by the arrow G% with respect to the base base 14.
Moves back and forth in the H direction, and the type unit 3 prints (7)
9 approaches or moves away from the type belt 1.
0 type 2! The gap between the printing hammer 6 and the printing hammer 6 can be adjusted. In this case, as is clear from Figure N3, the type unit 3 approaches or moves away from the printing type 22) 7 in parallel to the fixed frame 11, so that the type 22 side of the type belt 1 faces the printing hammer 6. are kept parallel, and so-called uneven contact will not occur.

FIGS. 5 and 6 are drawings showing a second embodiment. In this embodiment, as shown in FIG. A pair of protruding pieces 28.28t-protrudes from the opposing side surfaces of the notch recess 25 formed at the upper side of the cutout recess 25, and moves into the incision recess 25, and these protruding pieces 2@, 2
An eccentric cam 1@' is interposed between B and B. The lower part of the hinge part 23 and the lower part of the opposing surface of the moving part 240 are rotatably connected by a shaft 2T, and a shaft 28 is provided on the opposite side on the same axis as this shaft 27. A holding portion 30 that holds the other end of the movable frame 12 to the other end 29 of the fixed frame 11 is provided at the tip of the movable frame 12 . Incidentally, the type unit 3 is provided on the upper surface of the moving section 24 as in the first embodiment. Therefore, operation hole 2
1 to operate the eccentric cam 16', the eccentric cam 1@' can be rotated to one protruding piece 26 or the other protruding piece 2.
＠KmWIL, and due to the cam action, the moving part 24 rotates in the arrow 1 and J directions about the shafts 21 and 281 located on the Oka axis as shown in Fig. 6, The type unit 3 approaches or moves away from the printing machine 7, and as a result, the gap between the type 22 of the type belt 1 and the printing hammer a can be adjusted. In this case, as is clear from Fig. 6, the height from the position of the 1-type character belt 1 to the holding part 30t is not very large, so the type unit 3 rotates by 1% in the J direction, and the 4-printing hammer @ On the other hand, print! 2E1iFi hardly ever tilts, and almost no one-sidedness occurs.

(7) Effects of the Invention Since the present invention is constructed as described above, it is relatively light in weight.
The printing unit 3 is movably provided on the movable 7 frame 12, and the printing unit 3 is moved using the eccentric cam 111 and lli'.
[K! By applying pressure toward or away from the printing paper, the gap between the type characters 22 of the type belt 1 and the printing hammer 6 can be adjusted in accordance with the thickness of the printing paper with an extremely simple structure.

9. The approach or separation of the 4-character unit 3 from the printing unit T side can be made parallel to the fixed frame 11 as shown by the arrow G%H in FIG. 3 or by the arrow I in FIG. As shown by %J, the rotational inclination is small, so the surface of the type 22 hardly tilts with respect to the printing hammer 6, and it is possible to remove the so-called one-sided scratch of the printing hammer S and obtain a good printing finish. can.

[Brief explanation of the drawing]

1 and 2 are side explanatory views showing a paper thickness adjustment mechanism of a conventional line printer device, and FIG. 3 is a side view explanatory view showing a first embodiment of a paper thickness -41 mechanism of a line printer device according to the present invention. 4 is a plan view of the main part thereof, FIG. 5 is a perspective view of the main part showing the second embodiment, and FIG. 6 is an explanatory view taken in the direction of arrow 2 of FIG. 1... Type belt, 2... Drive pulley, 3... Type unit, 4... Printing magnet, S... Connecting rod, 6
...Printing hammer, T...Printing unit, 11...Fixed frame, 12.
・・■・Movable frame, 13... Axis, 14
...Base base, 15...Movement base, 111@'...Eccentric cam, 111.
... Spring, 20 ... Platen, 22 ... Type, 23 ... Hinge part, 24 ... Moving part, 25 ...・
・Notch recess, 2@...Protruding piece, 27.
211...Shaft, 30...Holding unit Applicant Fujitsu Ltd. Figure 1 d Figure 2 Figure 3 Figure 1 Figure 4

Claims (1)

[Claims] The fixed frame 5 is provided with a printing unit consisting of a combination of a printing magnet, a connecting rod, and a printing hammer, and the movable frame is provided with a printing unit consisting of a combination of a printing belt, a drive pulley, and a platen. One end of the movable frame is rotatably pivoted to one end of a fixed frame so that the movable frame can be opened and closed in a fan shape, and the type unit is provided movably relative to the movable frame in a swing gate type line printer device. In addition, an eccentric cam is provided on the movable frame, and by operating the eccentric cam to move the type unit toward or away from the printing unit side, the gap between the type characters on the type belt and the printed 71 mm is adjusted. Features: Paper thickness adjustment mechanism of line printer equipment.