JPS5833479A - Printing head of dot printer - Google Patents

Abstract

PURPOSE:To enable high speed printing, by a method wherein each solenoids are arranged in a circular form so as to differentiate high positions of said solenoids respectively and printing wires issued from the solenoids are successively inserted into a lip guide through holes provided thereto from the highest hole in the height order of solenoids to improve the following property of printing wires. CONSTITUTION:Plural solenoids 3 are arrnaged in a circular form and the height positions of each solenoids 3 are determined so as to be differentiated respectively and printing wires 8 issued from the solenoids 3 are inserted into a lip guide 7 through holes provided thereto from the highest hole successively in the height order of the solenoids. In this case, the printing wires 8 are gathered, fixed and supported by a conduit guide 6 so as to be introduced into the leading end lip guide 7. By this structure, the printing wires are straightly introduced into the leading end lip guide 7 without generating elastic deformation and friction resistance due to the guide hole is made low during printing operation and the following property of the printing wire 8 is extremely improved and high speed printing is enabled.

Description

DETAILED DESCRIPTION OF THE INVENTION Conventionally, in order to align the free end of a printing wire, one end of which is fixed to a printing wire drive solenoid, in a predetermined vertical arrangement, one or more of them are installed in the middle or at the front of the head main body. It has already been proposed to provide a wire guide, and to guide part of the printing wire in the length direction by a conduit in the area up to this side of the wire guide (Utility Application No. 1983-3282). 1973-39367)
. However, in this rice guide device, the printing wire is not linear but elastically deformed (curved) in the free space between the tip of the guide conduit and the final tip lip guide. This causes bending, amplitude, natural vibration, etc. in the wire guide, which increases the abrasion resistance with the wire guide and adversely affects the followability of the printing operation.

The present invention aims to eliminate the above-mentioned drawbacks.
The illustrated embodiment will be described in detail below.

1 and 2, wire drive solenoids 3 are screwed into a truncated cone-shaped bracket 2 of the head body 1 at positions that divide the circumference into nine equal parts, and are fixed with screws 4. In this case, the axis of solenoid 3 is
The printing wire 8 and its conduit 9 coming out from each solenoid 3 are connected to the first conduit guide 5 (5a) fixed to the bracket 2. , 5b) with a slope of angle α0. The arrangement of each solenoid 3 and therefore the arrangement of the conduits 9 leading out from the guides 5a, 5b are as follows:
As shown in Fig. 6 or 7, 4 pieces are placed on one side of the vertical center line YK, and 5 pieces are placed on the opposite side vertically symmetrically with respect to the horizontal center line X, and on the vertical center line Y. is determined so that the equal dividing lines of the 9 equal parts array do not come together.

In other words, there are a total of 9 conduits on the left and right of the vertical center line Y, 2n and 2n+1.
(However, n-2) are distributed into even and odd numbers.However, if the total number of solenoids or printing wires 8 is even, half of them are distributed on the left and right sides with respect to the vertical center line Y. 6 is a conduit holder fixed to the tip of the head main body l or provided between the lug guide 7 and the guide 5, and the second conduit guide 6a and the third conduit guide 6
b, thereby consolidating each conduit 9 and allowing the printing wire 8 coming out of each conduit 9 to linearly pass through the tip lip guide 7.
It is fixedly supported so that it can fit inside. That is, the printing wire 8 is guided by the conduit 9 until it passes through this conduit holder 6, and then the printing wire 8 is guided through the vertically arranged synthetic stone guide hole 7a of the tip lip guide 7 (FIG. 3). ) is plugged into a linear VC.

As shown in FIG. 4, the second conduit guide 6a has guide holes 6a-1 and 6a-2 arranged in two vertical rows, with an odd number of holes 6a-1 in one row and an odd number of holes 6a-1 in the other row. The holes 6a-2 are arranged in an even number, and the holes in both rows are arranged close to each other, for example, in a staggered manner. Each conduit 9 is smoothly drawn out from the conduit guide 5 of the third conduit guide hole 1 located between the first and second conduit guides with equal angular distribution and an inclination of angle α0 as shown in FIG. It serves to transform the arrangement of the second conduit guides 6a into two vertical rows, for example, as shown in FIG. 5, the guide holes 6b- 1,6b-21-. The numbers of these guide holes 6b-1 and 6b-2 are odd and even, similar to the second conduit guide 6a, but the guide hole rows are spaced apart at appropriate intervals. .

Of the respective conduits 9 coming out of the first conduit guide 5, an odd number on one side of the vertical center line Y shown in FIG. 6 passes through the conduit guide holes 6b-1 and 6a-1, and an even number on one side passes through the conduit guide hole 6b. -2
and 6a-2.

The printing wires 8 coming out from the tip of each conduit 9 are placed in the vertical column of the lip guide 7 in order from the highest position, starting with the one that is vertically symmetrical in FIG. 6, that is, the one belonging to the right half. It can be inserted into the guide hole 7a of the array. In this case, in the third conduit guide 6b, the tip of the printing wire 8 extending straight from the tip of the conduit 9 is connected to the hole 7a of the lip guide 7.
The conduit 9 is fixedly adjusted and supported so as to match the position of the conduit 9. Each conduit 9 has a second and a third conduit guide 5.6.
a.

The guide holes 6a are fixedly supported at 6 times in 3 places and exit from the first conduit guide 5 to form two vertical rows of guide holes 6a in the second conduit guide 6a.
-1, 6a-2 will elastically change in free space until it is collectively supported. In order to further ensure the support of the conduit guides 6a, 6b, it is advantageous to completely solidify the adhesive between the two guides 6a, 6b of the conduit holder 6 with adhesive.

The six holes 6b-1 and 6b-2 of the third conduit guide do not necessarily need to be arranged along an arc, and the printing wire 8 coming out from the tip of the conduit can enter the hole 7a of the tip lip guide 7 in a straight line. It is possible to take any shape depending on the arrangement of the solenoid 3 attached to the bracket 2, the mutual spacing and arrangement of the conduits 9 taken out from the first conduit guide 5, etc. For example, as shown in FIG. 8, the arcuate surface can be completely eliminated. Further, the third conduit guide 6b can also be configured as an adjustment guide whose position can be changed in the longitudinal direction of the conduit 9.

The printing wire 8, oriented with the fixed support of the conduit 9,
As shown in FIG.
It enters the hole 7a of the tip lip guide 7 linearly at an angle β to the tip. In this case, considering the gap or play due to the clearance between the printing wire 8 and the guide hole 7a, this play is the allowable angle β of the angle at which the printing wire 8 enters the guide hole 7a. will be given. Therefore, the printing wire 8 is at an angle β
Even if it enters the guide hole 7a with the same angle, this allowable angle β.

If it is within the range, the printing wire 8 smoothly moves into the guide hole 7a
penetrates through and does not adversely affect printing operation. This also means that the arrangement and spacing of the holes 6b-1 and 6b-2 of the third conduit guide 6b can be changed within the range where the angle β into which the printing wire 8 enters falls within the allowable angle 40. ing. Furthermore, the second
Of the conduits 9 arranged in two vertical rows on the conduit guide 6a, the centers of the holes of the conduits in one row are aligned with the axis Z,
In other words, β-0, and the center of the hole of the conduit in the other row is the axis Z.
The printing wire 8 may be guided to the hole 7a of the lip guide 7 so as to form an angle of 2β.

Tip lip guide hole 7 of printing wire 8 at the tip of the conduit
The deviation or level difference with respect to a becomes extremely small by distributing each conduit 9f upward and downward with the center hole of the tip lip guide hole 7a as the center. Therefore, the third conduit guide 6b
There is almost no need to adjust the printing wire 8 in the vertical direction, and the adjustment can be easily performed.

According to the present invention, the printing wire guide conduit is gathered and fixedly supported at the tip of the conduit by the conduit guides 6a and 6b, and the printing wire 8 can be elastically deformed in free space until it enters the synthetic stone tip lip guide 7. Moreover, since it enters the tip lip guide in a straight line, there is little abrasion resistance due to the guide hole etc. during printing operation, and there is no vibration or amplitude in the free space. Therefore, the followability of the printing wire 8 is extremely good, and a high-speed printing device can be obtained.

Since the conduit 9 is fixed at the second and third conduit guides 6a and 6b, there is no need to consider wear at least in these parts. Therefore, for example, as shown in Fig. 1, a double conduit is used, with the inner side made of a material with a low coefficient of friction such as a synthetic resin ring, and the outer side made of a material with appropriate strength and flexibility such as stainless steel. The outer side 149b can be provided until it exits the first conduit guide 5a or enters the third conduit guide 6b, and the part beyond that can be composed only of the inner layer 9a. In this way, the life of the conduit 9 can be extended. Alternatively, the conduit 9 can be fixed with adhesive between its first and third conduit guides 5 and 6b.

In the example, the total number of solenoids l and therefore the printing wire 80
Although the number of wires is an odd number, it is clear that the present invention can be applied to an even number of wires. In this case, the guide holes of the second and third conduit guides are arranged in two rows of even numbers, and the arrangement of the conduits 9 coming out from the first conduit guide 5 is as follows.
As already mentioned with reference to Fig. 6, there are 1/2 conduits on the left and right sides of the vertical center line Y, and the vertical position is adjusted so that the equal dividing line of the conduit or solenoid is not on the vertical center line. The location of each conduit or solenoid is such that each conduit or solenoid is slightly different.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a dot gritter equipped with the print head of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a tip ring guide seen in the I [l-111 direction of Fig. 2]. 4 and 5 are schematic diagrams of the ■-IV direction and ■- of FIG. 2.
■Schematic diagram of the second and third conduit guides seen from the direction, the sixth
The figure is a schematic diagram of the first conduit guide seen from the direction ■-■ in Figure 2, Figure 7 is a sectional view taken along ■-■ in Figure 2 of the first conduit guide, and Figure 8 is the FIG. 9 is an explanatory view of the printing wire entering the tip lip guide from the tip of the conduit. 1... Head body 2... Bracket 3... Solenoid 6... Conduit hole f-63... Second conduit guide 6b... Third conduit guide 7... Lip guide 8. ...Printing wire 9...Conduit 10...-F' Latin Procedural Amendment September 28, 1980 Kuchishi,! Mr. Kazuo Wakasugi, Director-General of the License Agency 1 Indication of the case 1982 Patent Export No. 127471 2 Name of the invention Print head of a dot printer 3 Person making the amendment tl Relationship with 1 Patent +l'+V
g1 person ni k i Dispatch 11, Showa, Month, Day 6, Column 7 of "Detailed Description of the Invention" and "Brief Description of 1 Drawing" of the specification to be amended, Contents of the amendment (1) Negative lines 19 to 20 of the third specification "(5a, 5b)
Correct J to "(consists of wire guide 5a and auxiliary wire guide 5b)". (2) "Guide 5" on page 4, line 13 is corrected to "wire guide 5aJ." (3) "First conduit guide 5" on page 5, line 18 is corrected as "wire guide 5aJ." (4) Between the 3rd and 4th lines of page 11, “5a...
・Wire guide 5b...Insert the auxiliary wire guide completely.

Claims (2)

[Claims] (1) The lip guide provided at the tip of the print head,
multiple solenoids installed at the rear of the print head;
In a print head of a dot printer having a rear end attached to the solenoid and a print wire having a tip inserted into one of the holes of the lip guide, the plurality of solenoids are arranged in a circle, and the height of each solenoid is The printing head of a dot printer is characterized by positioning each solenoid at a different position, and inserting the printing wire coming out of the solenoid from the highest hole in the lip guide in order of the height of the solenoid. (2) A lip guide provided at the tip of the print head, a plurality of solenoids provided at the rear of the print head, the rear ends of which are attached to the solenoids, and the tips are each inserted into one of the holes of the lip guide. In the print head of a dot printer having a printing wire, a wire guide is provided between the solenoid and the lip guide to guide the wire in a circular shape and to position each wire at a different height, A print head for a dot printer characterized in that a print wire coming out of the wire guide is inserted into the lip guide in order from the highest hole.