JPS61229565A - Manufacture of impact mechanism part for dot printer - Google Patents

Abstract

PURPOSE:To provide conditions for disposing printing hammers and enable the hammers to be disposed in a narrow range, by a method wherein a blank assembly is provided with printing hammers, impact arms are provided by slitting, the entire body is bisected in a specified direction, and the bisected parts are fixed in a deviated condition. CONSTITUTION:The blank assembly 1 comprises an annular leaf spring 7, an armature blank 8 and an impact arm blank 9, which are laminated. With an original 10 near the center of the blank 9 as a center, the printing hammers 11 are provided symmetrically with respect to Y-axis at two-pitch intervals 2sigma in the Y-direction and at intervals of a predetermined pitch tau in the X- direction. A section 12 from the outer peripheral surface of the armature blank 8 to the center of the blank assembly 1 is provided with centripetal slits 13 so that each of the printing hammers 11 is included in a tip part of each impact arm. The entire body is bisected along the slit 13a and along a line passing through the original 10. The impact mechanism parts 14a, 14b thus divided are fitted to a structure part in the state of being deviated from each other by sigma in the Ya-axis direction along the dividing surface, and are fixed there.

Description

[Detailed Description of the Invention] The invention in the field of industrial application is that a printing hammer in the form of a small protrusion is arranged in a special manner on each impact arm; The present invention relates to a method of manufacturing an impact mechanism section of a printer.

With the rapid spread of printers such as Word Pro, etc., various structures have been proposed for the dot printer, the dot printer, and the current impact arm dot printer. The wire tod printer is the most commonly used printer.As wire tod printers are required to have faster printing speeds and higher quality printed characters, ■The number of dots that make up the characters increases, and the hammer mechanism becomes extremely minute, making it difficult to manufacture. ■To ensure high-speed drive performance of the print head. Printing.

There is a need to reduce the weight of Dozensai 5, but since the wire hammer and the guides and supports for aligning it are essential elements, we have to limit the printing strength. In order to keep the printing energy uniform, it is necessary to keep the strength of each spring that gives printing energy to each wire hammer constant. Problems have been pointed out, such as the hammer bending during printing, reducing the quality of printed characters, and hindering high-speed printing. Patent application No. 58-083 for an invention relating to a dot printer constructed based on a completely new technical idea in order to solve the problems of this type of wire tod printer.
There is one shown at 510. An example of this invention is shown in the 10th example.
This will be explained with reference to FIG. 14. In Figure 10, 101 is! 102 is a tube part (102a
) and a flange portion (102b), main yoke 1
Numeral 03 denotes a plurality of electromagnetic mechanisms which are radially erected independently on the top surface of the flange portion (102b), and numeral 104 denotes a plurality of i, each independently radiated to the top surface of the core of the electromagnet mechanism. The armature, 10"'5, is arranged vertically so as to closely cover the side of the seven-legged armature.
It is an auxiliary yoke with a permanent magnet 10f - a main yoke 102 - a core 103 of five electromagnet mechanisms - an armature j
04, a magnetic path of a lot of permanent magnets is formed in the path. The armature 104 is supported by independent springs 108 whose peripheral edges are fixed, and the armature 104 is
04 is provided with independent impact arms 107 in a centripetal manner. A printing hammer 108 is formed at the tip end of the impact arm 107 near the center, one for each impact arm 107. The part consisting of the spring lO6 and the impact arm 107 constitutes the impact mechanism part of the dot printer.The printing and work of this dot printer □ involves the following electromechanical process. It will be done.

In the non-printing stage, as shown on the right side of Fig. 10, the Aryachi wind 1'1, 04 is caused by the magnetic flux of the permanent magnet 101 configured in the magnetic path, and therefore the "electromagnet" mechanism is While being attracted to the core 103, elastic energy is stored in the spring 10-6, and the coil 109 of the electromagnetic mechanism is in the state 1 waiting for the coil 109 to be energized. It's true. When the coil 109 of the electromagnet mechanism is momentarily energized from this state, the magnetic flux of the permanent magnet 101, which was currently configured in the magnetic path, becomes energized and is caused by the reverse excitation flux. This is canceled out, and the adsorption state of 7-Machu 71'04 is released instantly, and the armature 104' becomes the spring 10.
The impact arm 107 is driven by the elasticity of
The printing machine 108 embosses the printing paper through the ink ribbon to print dots. After this printing operation is completed, the power to the coil 1'09 has already been cut off, so the armature 104 is once again attracted to the coil 103 of the electromagnetic mechanism and returns to its original state. Become.

Problems to be solved by the invention: Disconnection of the impact mechanism of this dot printer. 11 and top view 1 are shown in FIGS. 11 and 12, respectively. Although the impact arm 07 is constructed as an assembly of different materials, there is one condition regarding the impact arm being composed of a single material plate. Forgive me, Crab 7 et al.: There is no problem.)However, (there are technical problems in this type of pinned mechanism) and t'1. .A: Impacted arm 1'0
Form the printing hammers 108., one on each impact arm 107, very close to each other at the center □ □ of □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □ 108.・In addition, there is a requirement that each impact arm 10 and 17 be configured independently through a slit with a constant radius. It has been pointed out that the manufacturing method becomes extremely difficult. This problem will be explained in detail using FIGS. 13 and 14. As shown in FIG. 13, the printed I mark 108 is printed near the center end of each impact arm 107 at approximately an integral multiple of a predetermined pitch in the horizontal axis (X-axis) direction in the orthogonal coordinates, and on the vertical axis (Y-axis). have a predetermined pitch in the direction,
Each impact arm 107 is arranged in a centripetal manner.
There is an absolute condition that it must be placed as centrally as possible in the width direction. Here, the X-axis direction is the driving direction of the print head when the impact mechanism section is attached to the print head, that is, the direction in which characters are printed.
When the print head prints characters vertically (horizontally), the Y-axis direction is the vertical (horizontal) 'direction of the characters, and in the Y-axis direction are the printing hammer 108m at the top and the printing shimmer 108b at the bottom. The distance between the two characters is approximately the maximum width of the printed characters. The necessity of arranging the pitch in the X-axis direction so that it is approximately an integral multiple of the predetermined pitch is because the CPU (Central Processing Unit) of a word processor or computer has a predetermined clock. Under the general conditions of the printing hammer 108 described above, there is often a limit to restricting the installation area to the narrowest possible range, and in the X-axis direction. The disadvantage of arranging them at irregular intervals in the CPU is that it complicates the software installed in the CPU. In particular, it is extremely difficult to manufacture an impact mechanism for constructing 10 point + x 2 point kanji characters using a matrix of 24 or more dots, as seen in recent Japanese word processors. On the other hand, as shown in FIG.
Placing the printing hammer 108' in a straight line on the top increases the possibility of placing the printing hammer 108' in a narrow area, and also improves the precision of the placement position; Inno (same w of the kuto arm) for the movement of the character head.
There is an advantage that the software installed in the CPU for taking i□ becomes simple. However, in reality, if we process the ribs 110 that separate the impact arms 10'7 in a centripetal direction, the printing hammer 108 will move in the width direction of the impact arm 107. There are many cases where it cannot be placed in the center (for example, 1010
8cml08・□, and if there is no placement position at all according to the placement conditions, printing hammer l, 08 is a sleeve) 11
If you end up “located above 0” (l・oah,
I O-8 "r') was produced, and it was impossible to produce the same □.This means that the larger the number of printing hammers, the smaller the number, and the smaller the printed characters. The more likely it is that a printing hammer must be provided in a narrow area, the more likely this problem will occur.
It was created with the aim of providing a method for manufacturing and using an impact mechanism part extremely easily while satisfying the installation conditions of the drive.

Means for resolving the point of view ・ :′
The basic concept of this invention will be explained below using FIGS. 1 to 4. The method of manufacturing the impact mechanism part of the dot printer according to the present invention consists of the following four steps.

``□ ゛ □The first step is the step of arranging the printing hammer, and a plan view and a sectional view showing the installation area of the 1st hammer t are shown in Figs. 1 and 2.
The figure shows the material plate 2 or 2' of the impact mechanism section is used for printing in the material assembly 1. At the center of the assembly 1, □ is placed at 2 pitch intervals (2 With σ, multiple small protrusions are printed at a predetermined pitch (τ) in the direction of the horizontal axis (x□・1″− axis) at approximately an integer multiple of the quotient:・(In this case, the intervals are all τ) Han
Yer 2 is installed. ``The second step is to make each impact part independent. This process is the third
As shown in the figure, a sleeve 4' is machined concentrically in the tip of each printing plate spring or each impact arm, and each independent impact part is 5.

The third step is a step of dividing the entire impact mechanism section into two. That is, in this process, like the straight line shown by B-B in FIG. The entire impact mechanism section is divided into two parts along a straight line.

The fourth step is to shift and fix both sections of the divided impact mechanism section. That is, as shown in FIG. 4, both sections 1a and lb of the impact mechanism section divided in the third step are arranged along the dividing surfaces 6a and 6b. So that the printing hammer 2 is shifted by 1 pitch q in the vertical axis (Y-axis) direction.

It is fixed by sliding it. In Figure 4,
The X a - Y a coordinate is a translation of the original x - Y coordinate, but the fourth step finally determines the position,
The printed impact mechanism part, hammer 2, is 1 pitch τ in the horizontal axis (Xa axis) direction and 1 pitch in the vertical axis (Ya axis) direction.
They are arranged with a positional relationship of pitch q.

In the above steps, the order of the second step and the third step may be either preceded, and the dividing line of the third step is the same as the second step.
Since this process overlaps with the slit 4 in the second process, it can also be performed at the same time as the slit 4 in the second process.

Function: In the first step and the second step, the printing hammers 2 are arranged symmetrically and regularly to process the slits, so while meeting the arrangement conditions during use, It is possible to dispose the printing hammer 2 within a narrow range and at approximately the center position in the width direction of the tip of each impact part 5. As a result, the problems pointed out in the prior art are solved very rationally.

Also, as mentioned above, either the second step or the third step may be carried out in advance, or they may be carried out at the same time.
When the third step precedes the second step,
It is often convenient because the slits 4 can be machined from the dividing surface side, and on the other hand, there is an advantage in that the machining time can be shortened when the slits 4 are machined at the same time. 4th work 18°
tmnihm'i;:t", mA"'6"-Pa""
Electromagnet: In relation to the structural part consisting of the structure.

1. Each impact part 5 is located at a position facing each electromagnet mechanism.
need to be established. However, in this invention, since the two sections 1a and 1b8 of the impact mechanism section are arranged in a shifted relationship, when the electromagnet mechanisms are arranged symmetrically and symmetrically, each electromagnet mechanism and each inner, outer, between the correct positions 1. However, the distance shifted in the fourth step is slightly larger than 1 pitch q in the vertical axis direction of the printing hammer 2.
．． It has almost no effect on the magnetic path of the permanent magnet.

Embodiment Next, one embodiment of the present invention will be explained with reference to FIGS. 5 to 9. 5 and 6 show a plan view and a cross-sectional view of the material assembly of the impact mechanism part. In the figures, 7 is a leaf spring in which a spring 7b is formed centripetally from an annular plate part 7a. Yes □, 8 is annular armature material, 9 is annular, in, bact arm material. And 1.

These members are stacked as shown in FIG.
Its laminated and welded on the surface.

For this material, in the first step, the invacuum material 9 is perpendicular to the central region of the material 9 based on the same idea as shown in FIG.

2 pips in the direction of the vertical axis (Y-axis) so that it is symmetrical to the left and right with respect to the vertical axis (Y-axis) with the coordinate origin lO as the center:
A plurality of small protrusion-like printing hammers -11 are formed at predetermined pitches (τ) in the horizontal axis (X-axis) direction with an interval of 5 inches and an interval of .(2σ). This method includes cutting,
Although it is possible to rely on the machining process, it is possible to increase the accuracy of the placement and placement of the printing hammer 11 by carving the base (carving) of the electrical discharge machining. It can also be said to be a suitable processing method.

In the second step, the section 12 from the outer peripheral surface 8a of the armature 8 to the center of the material assembly is centripetally processed so that each printing hammer 11 is included in the tip of each impact arm. do. Through this process, each independent impact part is formed, and when this process is completed, the area in which the printing hammer 11 is disposed is enlarged. become.

In the third step, the line passes through the origin 10 of the orthogonal coordinates shown in FIG. The whole is divided into two along a straight line, that is, a two-dot chain line indicated by M-N in FIG. In this case, the dividing line corresponds to the slit 13a in FIG.

After all, it's a circular board with a road map and an "i-board...".

The corresponding portions 7m and 7n of the portion 7a will be cut.

FIG. 8 is an enlarged perspective view of the region where the printing hammer 11 is disposed when the printing hammer 11 is divided into two parts.

In the fourth step, each of the impact mechanism parts 14m and 14b divided in the previous step is shifted along the dividing plane and attached to and fixed to a structural part consisting of a permanent magnet, a yoke, and an electromagnet mechanism. The amount of this shift is such that in the first step, the printing hammer 11 is 2 in the vertical axis (Y-axis) direction.
However, after one division, each printing hammer 11 of each impact mechanism section 14a and 14b is arranged at a pitch interval (2σ) in the Ya axis direction in the X a - Y a coordinate in FIG. The amount is such that the positional relationship is 1 pitch (σ). On the other hand, the inability of the printing hammer to maintain a predetermined pitch (τ) in the horizontal axis (Xa axis) direction due to shifting can be corrected by adjusting the facing distance of the 1-division plane. still,
The means for mounting is to form a pin hole in advance in the structural part consisting of the material of the impact mechanism, a permanent magnet, a yoke, and an electromagnetic mechanism, and then position it with a pin. Alternatively, means for positioning and fixing using an assembly jig may be employed.

While meeting the conditions for arranging the effect hammer of the invention, the printing hammer can be arranged within a narrow range, and the printing non-marker can be provided at the middle position in the width direction of the C end of each impact part. . As a result, the print mechanism of the dot printer is capable of printing the characters shown with a large number of dots, ts, and ts:*2:! 5Et6-Since it can be arranged symmetrically and regularly, it is convenient for designing and processing the printing hammer.

Furthermore, when the third step is performed before the second step, the slit can be processed from the dividing surface, making it easier to process the slit.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the area where the printing hammer is placed on the material plate or material assembly of the impact mechanism, and Fig. 2 is a sectional view showing the same area (A-A in Fig. 1). 3 and 4 are plan views showing the same area,
Figure 5 is a plan view of the inn, -681 is a cross-sectional view of the same (C-C arrow cross section in Figure 5, Figures 7 and 8 are perspective views showing the area where the printing hammer is arranged, Figure 9 shows assembly: After: i:
:Nini:=:ττ::,,, 7.1. :7:2: cross-sectional view, Figure 12 is a plan view of the impact mechanism,
Figures 13 and 14 show enlarged plan views of the tip of the impact arm □. :=:Two jokes:2/< : , ):: It 7 * #
'Two. 3 is the origin of the X-Y seat 1, 4 is the slit, 5 is the impact part, 6 is the dividing surface, 7 is the leaf spring, 9 is the impact arm material, 10 is the origin of the x-y coordinates 1. 11 is the print head, 1
2 is a section, 13 is a slit, and 14a:l and 14b are divided impact mechanism parts. Agent Patent Attorney Toshikazu Nagai Figure 2 Figure 3 50 □ ゛1□ Figure 6 and Figure 8 14b Figure 9 Figure 12 Figure 14

Claims (1)

[Claims] A plurality of leaf springs are arranged in a centripetal manner, and each leaf spring or an impact arm attached thereto has a pitch approximately an integer multiple of a predetermined pitch in the horizontal direction of the orthogonal coordinates, and a vertical axis near the center end of each leaf spring or the impact arm attached thereto. In a method for manufacturing an impact mechanism part of a dot printer in which small protrusion-like printing hammers are arranged at a predetermined pitch in a direction, a vertical axis centered on the origin of orthogonal coordinates is applied to a material plate or material assembly. A process of arranging a plurality of small protrusion-like printing hammers at intervals of two pitches in the vertical axis direction and at substantially integral multiples of a predetermined pitch in the horizontal axis direction so that each small protrusion-like printing hammer The process of forming each independent impact part by machining a slit centripetally to be included in the tip of the leaf spring or each impact arm, and the process of forming small protrusions that pass through the origin of the orthogonal coordinates and are arranged next to each other. The process of dividing the whole into two parts along a straight line passing through the approximate center between the printing hammers, and the small protrusion-like printing hammers disposed on both parts are divided into two parts along the dividing plane. A method for manufacturing an impact mechanism part of a dot printer, comprising the steps of sliding and fixing the impact mechanism part by one pitch.