JPS60255451A - Head bank for printer - Google Patents

Abstract

PURPOSE:To obtain the titled head bank by the simple structure of which a painting hammer body can be attached to a carriage in a good positional precision, by attaching the printing hammer body with a simple fixing metal fitting not using any setscrew and a semilunar pressing plate. CONSTITUTION:A printing hammer body is fitted into the boss 10 for the purpose of locating the printing hammer body 5' of a carriage 1. After hitching the fixing metal fitting 12 having fixed a semilunar pressing plate 11 on the hook 8 sealed solidly in a carriage 1, the semilunar pressing plate 11 is hitched on the boss 9 of the carriage lower part in a crushed shape and the printing hammer body 5' is fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a head bank of a printer used as an output device for printing data processed by a computer or the like.

Conventional technology A dot impact printer consists of a head bank in which printing hammers are arranged horizontally in a row, a shuttle mechanism that swings the hammers horizontally at a constant amplitude, a paper feed mechanism, etc. Then, each printing hammer operates and marks dots at regular intervals, so a one-way operation creates a horizontal row of dots. Then, when folding the paper, the paper is advanced slightly and the next row of dots is printed. In this type of dot impact printer, the head bank is extremely important, and various improvements have been made to reduce weight to increase response speed, extend the life of the bottle, and use accurate marking methods. The magnets, yokes, coils, connectors, etc. are all encapsulated and molded using resin, which reduces the number of assembly steps and ensures positional accuracy.

Problems to be Solved by the Invention However, at present, the printing hammer is attached to the carriage by screwing it through a presser plate, and it is difficult to install the printing hammer by providing a screw groove on the resin carriage center. It is very difficult to do so, and even if insert screws are used, there are problems in terms of cost.

This will be explained in detail with reference to FIGS. 3 and 4. Third
In the figure, 1 is a carrier, 2 is a 31-k, 3 is a permanent magnet, 4 is a degaussing coil, 5 is a printing hammer body, and a 4th
As shown in the figure, the plate is formed into a comb shape with a plurality of free ends 5
a, a commonly connected fixed end 5b, a printing pin 5C protruding from each free end, and a mounting hole 5d drilled at each fixed end. 6 is a holding plate, 7 is a set screw, and the carrier body l is made of resin, and the yoke 2 and permanent magnet 3 are used during molding.
, the assembly f by integrally molding the coil 4, etc.
There is no need to reduce the number of yokes or position the yoke.
1 of the carriage 1 with several setscrews 7 through the
8, the printing force of the printing hammer Pino 5C requires a lot of assembly in order to position the printing hammer Pino 5C and to prevent the printing force of the printing hammer Pino 5C from occurring due to the positioning of the printing hammer Pino 15C and the tightening force during installation. It required a lot of man-hours.

Means for Solving the Problems The present invention aims to eliminate such drawbacks and provide an excellent head bank that is simple, easy to ensure positional accuracy, and requires few assembly steps, and has developed a printing hammer. It consists of a simple fixing fitting that does not use set screws, and a semicircular holding plate that evenly applies the force of holding down the printing/1-ma body.Printing!- The mark body is positioned by fitting the boss provided on the mounting surface of the carriage with the hole provided in the printing/1 mark body.The fixing bracket is latched to the carriage using the elasticity of the semicircular holding plate. The configuration is 0.

According to the present invention, accurate positioning accuracy is maintained by inserting the printing mark into the positioning boss on the printing mark/marker mounting surface of the carriage, and the locking part formed on the carriage maintains accurate positioning accuracy. ,
A single printing hammer body can be fixed by simply fitting a fixing bracket to which a half-moon-shaped presser plate made of spring material is fixed in advance using a spotter, bolt, etc. In normal printers, a single hammer body is comb-shaped and has a free end. There are three to four movable parts each having a hammer pin, and only one hammer body is required by arranging several hammer bodies side by side on a carriage, which greatly shortens the installation time.1. This has many effects, such as eliminating damage to the carriage and dispersion caused by screw tightening.

Embodiment FIGS. 1 and 2 show an embodiment of the present invention. In FIGS. 1 to 2, the same parts as in FIGS. 3 to 4 are designated by the same reference numerals, and the explanation thereof will be omitted. What is new is a stopper 8 that is integrally molded into the carriage 1, and a fixing member 12 that is provided with a half-moon-shaped retainer 11 that presses the printing hammer body 5. The stopper 8 has a protrusion provided near the mounting surface 18 of the carriage 1 corresponding to the comb-shaped gap 19 of the printing hammer body 5', and the lower part is located near the mounting surface 18t- of the carriage 1. The carriage 1 has respective bosses 9 and σ for positioning the printing hammer body 5' and for stopping the fixing metal fitting 12.
10 protrudes, and after fitting into the printing hammer body 5', half-moon-shaped presser plates 11 are fixed so as to abut against the upper and lower A and B of the base (fixed part) of the printing hammer body 5''. After hooking the metal fitting 12 to the above-mentioned fastening metal fitting 8, hook the boss 9 at the bottom of the carriage in such a way as to crush the half-moon-shaped holding plate 11 with strong force to fix the printing hem 5'. , the carriage 11 is attached to a portion 20 forming the surface 18 and has a U-shaped cross section, and the intermediate portion 21 is attached to the portion 20 of the carriage corresponding to the surface 18;
- The L surface 22 is the upper surface of the portion 20 and corresponds to the portion 23 having the stopper 8, and the lower surface 24 has a shape corresponding to the lower surface 25 of the portion 20. Therefore, the upper surface 22 has a shape in which concave and convex portions are alternately formed.

The handle 1 metal 12 is press-molded into a U-shape, and the stopper 8L
The semicircular (moon) shaped holding plate is a metal plate with a boss hole 26 and is press-formed into a semicircular shape using a spring material and then fixed to the inner surface of the intermediate part 21 of the mounting bracket 8 with a spot welt or the like. , the printing hammer body is evenly pressed at two points above and below the fixed part, so it is easy to tighten without the need for man-hours like tightening screws.
There is no variation in force distribution.

The printing hammer body 5' has a hole 35 that fits into the boss 10. Although the fastener 8 and the boss 9 are used as means for locking the mounting bracket 12 to the carriage 1, the present invention is not limited to this, and other convex portions and four locking means may be used.

Effects of the Invention As described above, by improving the suction mechanism integrally enclosed within the carriage and the printing hammer attachment method, machining of the carriage is no longer required, and the reliability of the head bank is increased.
Due to the weight reduction due to the use of resin, the load on the measuring drive circuit is also significantly reduced, which together with the reduction in assembly and adjustment man-hours, has a significant effect on cost reduction.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a splitter head bank according to an embodiment of the present invention, and FIG. 2 is a partial front view of FIG. 1. Fig. 3 is a sectional view of a conventional printer head bank, Fig. 4 is a partial front view of Fig. 1, 1 is a 4-spring head, 2 is a yoke, 3 is a magnet, 4 is a coil, 5 and 5' are printing hammers. body, 5a is a free end, 5b is a fixed end, 5c is a printing hammer, 6 is a presser plate, 7 is a set screw, 8 is a stopper, 9 and 10 are bosses, 11 is a half-moon type presser plate, 12 is a mounting It is a metal fitting. patent applicant

Claims (1)

[Claims] Magnet and yaw? A suction mechanism section consisting of a coil and the like is enclosed in a head carriage made of resin, a free end portion having a printing hammer faces the suction mechanism section so as to be movable toward and away from the head 1- In a printer head bank equipped with a printing hammer body fixed to a shaft carriage, after the fixed end of the printing hammer body is positioned by a guide pin protruding from the head carriage, a semicircular head bank provided on a fixing bracket is positioned. A hammer bank for a printer, characterized in that the fixing metal fitting is pressed by a flat plate and is locked to the helad carriage against the elasticity of the holding member.