KR820000453B1 - Device for guiding the printer needles in a mosaic needle printer - Google Patents

Abstract

A mosaic needle print head partic. for use in data or telex machines has two echeloned rows of six print needles each in the print zone at the print end of the printing head such that 12 character elements are available in the vertical direction to form letters. Thus 12 plunger type magnet systems(2) are disposed in the print head, the magnet systems being ranged in three planes, inclined towards one another, each of which contains four plunger type magnet assemblies(2) which are also inclined towards one another. Guide plates (5,6,7,8) provide a guide assembly for the needles(3).

Description

Induction Device Of Mosaic Printing Machine Needle

1 is a side view of a mosaic printer head.

2 is a plan view of the mosaic printer head (FIG. 1).

3 is a sectional view of a mosaic printer head.

Fig. 4 shows the guide plate of the printing press head in the left chain position.

5 is a guide plate of one of the outer pairs of curved guide plates.

6 is a side view of FIG.

7 is a side view of another guide plate of the outer pair of curved guide plates.

8 is a plan view of FIG.

The present invention relates to a device for guiding a needle of a mosaic needle printing machine, which printing machine can be used in office work, information and telex printing machines.

The number of needles that operate horizontally to form characters varies vertically, depending on whether the mosaic press prints only uppercase letters or lowercase letters of relatively short length, and whether the mosaics that form the characters are rough or fine. The needles of the press form one by one as the mosaic press head moves along the line. Typically at least seven print needles are needed to form a capital letter. In order to operate these printer needles, a driving device that takes up more space than the height of a character is required. The printer needle must thus be guided from the printing area to the drive along a forked path. This is especially true when the drive is a plunger type magnetic system which is advantageous when used in mosaic needle printing machines. However, the relatively large diameter at which the press needle leaves the center of the magnetic system determines the packing density. It is extremely problematic to induce very thin printing needles between the drive and the printing area. However, a good derivation in this area has had a great deal of effort to solve this problem since it has a decisive effect on the satisfactory operation of the printing press and its lifetime.

It is known in the mosaic printing press that the needle guide device is arranged such that each drive device is located at each drive shaft aligned with the printing point. So the print needles go along the straight line to the print area.

Here, the print needles are guided at specific intervals by the arms. The problem with this apparatus is that the distance between the mosaic printer head and the recording portion is quite far. This distance reduces the appearance of the image.

For this reason, it is common to guide the needles parallel to each other near the printing point. In this case, the needles need to be fanned out along the curve from the printing point to the drive. Inducing the printing needle along the curved path causes more problems because the printing needle is subject to the bending moment.

Using the arm from time to time to guide the printing needles requires very high precision (as indicated in German patent 2430440) to ensure effective guidance characteristics.

On the other hand, a device is also known in which the printing needles are guided to the major part of the hardness between the printing point and the drive. The device of German Patent No. 25303005 uses a cast induction device on the needle. So-called master needles are used during the casting process, and plastic cans are made around the needle. For the most part, the removal and production of long, thin master needles from castings, for example, is very difficult.

In another device (German Patent No. 2360435), the printing needles are individually led to their own induction tubes. This induction tube is made by casting.

It is an object of the present invention to make a guide device for printing needles of a mosaic printing machine which can be made relatively sure and simple.

The needle induction device made in the present invention has one driving device for each needle, and the driving device is an array of devices in which the axes of the driving device occupying a single plane are arranged in line or occupying each single plane. The axes of are arranged in rows. A pair of guide plates is provided for each row, with guide passages for each needle driven by the drive of the associated row defined between these guide plates.

Guide passages of each set of guide plates are collected toward the printing point and are almost parallel there.

Each pair of guide plates is engaged with each other.

The drive operates magnetically.

The above-mentioned drives are plunger solenoids.

The above-described guide passages are formed to be very visible to each other with the contact surfaces of the associated guide plate.

Each guide passage is a groove formed in one guide plate of a pair and is closed by another guide plate.

Each of the two guide plates paired has at least one groove in the surface.

The aforementioned drive units are arranged in three planes, each plane having four drive units and the three planes inclined to each other in a fan shape.

Of the four guideways for each row of drives, the outer two are formed in one of the pair of guide plates and the inner two are in the other guide plate.

Each pair of guide plates has a centering lug to align with each drive.

Above the guide plate is a guide lug inserted in the U-shaped device in the distal region of the passage away from the drive and fixed there by a spring.

Referring to the drawings in detail as follows.

The figure shows a mosaic needle printer head 1, which is used for information or telex machines. The press head is arranged in two lines in the area of the printing point, each line has six press needles and the two lines can be interchanged. Thus, twelve letter elements can be used to form letters, or letters. The twelve plunger type magnetic systems 2 are arranged on three planes which are inclined with each other on the mosaic printer head (FIG. 1). Four plunger-type magnetic systems are arranged at an angle to each other in the plane (FIG. 2). Guide plates 5, 6, 7, 8 for guiding the printing needle 3 are arranged between the plunger type magnetic system 2 and the guide 4 adjacent to the printing point (FIG. 3). These guide plates are coupled in pairs and fixed to each other. As shown in FIG. 3, the induction plate pairs 7 and 8 assigned to the magnetic system located on the center plane are generally flat, whereas the induction plates 5 and 6 applied to the magnetic system located on the outer plane are generally flat. Each is bent outward. The printing needles 3 are guided in the dividing surface area between each set of guide plates 5, 6 or 7, 8.

One of the outwardly directed guide plates 5, 6 is shown from 5 to 8 degrees. A set of guide grooves (9) (10) are dug into the guide plate (5) and the guide plate (6), the guide plate (5) is a guide groove (10) for the middle pair of plunger-type magnetic system disposed on this plane (See Figure 8). The grooves 9 and 10 of each pair are sealed by the corresponding guide plates 5 or 6 in each case.

The guide plate 6 is provided with a ring 12 which is driven by a locking face 12 of the guide plate 5 when the two guide plates 5 and 6 are joined to form a pair. The zones 13 and 14 in the guide plates 5 and 6 are mated to one another so that they protrude or are in the plaque. In this arrangement, although two of the guide grooves are in the guide plate 5 and the other two are in the guide plate 6, the guide grooves 9 and 10 are formed in the common plate near the plunger-type magnetic system 2. To be done. In addition, the guide plates are guided laterally and aligned in line with each other. The center lug 22 and the corresponding center vent 23 allow for simple and correct assembly.

In the vicinity of the magnetic system 2, the guide plates 5 and 6 have center lugs 15 and 16 having induction contours concentric with the guide grooves 9 or 10, respectively. These lugs bite into the holes 17 of the plunger-type magnetic system 2 so as to give an optimum match with the guide grooves 9 and 10 and the magnetic system 2. Guide plates 5, 6, 7, 8 are inserted into the U-shaped device 20 in the mosaic printer head 1 by guide lugs 18, 19. The spring plate 21 is fitted to the apparatus 20 to firmly support all the guide plates 5, 6, 7 and 8, so that they are fixed at the correct relative position where they are inserted.

4 shows a cross-sectional view of the guide lugs 18 and 19 of the guide plate inserted in the u-shaped device 20 with the exit of the guide groove for the printing needle. The print needles 3 leaving the guide plate in four vertical rows eventually collect in two adjacent vertical rows of six in the guide 4 near the actual printing point.

Thus, on the one hand, the induction device for the printing needle between the drive and the printing point can be produced extremely economically with plastic injection molds, and on the other hand, the printing needles are ensured to be guided in an induction device ideally suited for these induction passages. do. Therefore, the print needle and guide passage are not excessively worn even if used excessively. If the plastic guide part is worn out, these parts can be replaced very simply because the guide plate can be removed and removed from either side of the guide passage.

By placing the guide grooves for each of the printing needles in one of the two plates that make up the jaws, and placing them sealed by the other plates, the combination of these two guide plates is not a big problem.

By placing a plurality of guide passages on one plate and placing a plurality of second guide passages on different guide plates in a jaw, these needles are placed at the printing point so that the needles of the printer can be guided parallel to each other on these two plates. When approaching, it may have guideways in two planes.

With 12 printed needles, the drive is placed in four banks on three planes inclined towards each other (see FIGS. 1 and 2) and in each case the outer guide passage leads to one guide. It is particularly advantageous when the plate is in the middle, and the middle guide passage is in another plate. This arrangement enables the use of only three types of guide plates: a pair of flat guide plates assigned to the drive in the middle plane and two pairs of curved guide plates assigned to the drive arranged in the outer plane (see See also 3).

Center lugs (15) and (16) are provided to align the driving device with guide lugs (18) and (19) at the end of the guide plate close to the printing point and lugs (18) (19) to the u-shaped device in the mosaic printer head. The insertion of the guide plate allows easy and economical assembly, and the guide plates which are held together can be inserted by the center lugs 15 and 16 of the corresponding guide holes in the drive unit.

Claims (1)

There is one drive for each printing needle, and the drives are arranged so that the axes of the drive occupying a single plane are in line or the axes of the drive of each row occupying each single plane are arranged in rows. Induction device for mosaic printing machine needle, characterized in that it has a pair of induction plates defining guide passages for the needles driven by the drive with respect to heat.

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