DE1092037B - Device for point-by-point recording of characters - Google Patents

Description

Further disadvantages arise with the ones mentioned
Devices in that a very precise length- '"" ~ ~

adjustment of the pressure wires is necessary to achieve a "

to get an even impression.

The printing device according to the invention connecting channels of the adjusting rail around the corresponding avoids these disadvantages by making the selection slide the difference in length.

Wires by means of a rotatable and vertically adjustable. The special advantages of the device according to

adjustable key rod takes place, which are with the axis of the invention so in the use of a vertical incisions is provided, with the key rod, the manufacture of which is easy, in the selected print wires through the remaining 35 clear and broken down arrangement of the Outer surfaces of the key rod in the pressure position adjustment elements and in the use of frictional displaceable are. The key bar is made using wires as compensating links that are an exact length of one Differential lever linkage, which make adjustment of the pressure wires unnecessary by magnets, is controlled via racks and gears in Further features of the invention emerge from

their position raised and rotated. The print wires 40 of the specification, drawings, and patent are presented by moving back and forth to the side.

The invention is explained below using an exemplary embodiment with reference to the drawings. It shows

Fig. 1 is a schematic representation of the printing unit control,

Fig. 2a to 2d four successive positions the wire adjustment device,

3 a to 3e three successive positions

of the printing wires an uneven impression of the 50 of a modified wire setting device, Result in characters. Those with the printing Fig. 4 is a view of the wire adjusting device

wires connected friction wires allow according to Fig. 3,

but a compensation of such differences in length, Fig. 5 is a schematic representation of the difference

by pushing into the side lever linkage at the moment of pressing,

009 630/8

Adjusting rail for adjustment guided against the key rod. According to another feature According to the invention, the movement of the adjusting rail is guided by means of friction channels in the adjusting rail Transfer friction wires to the pressure wires.

Slight differences in length of the pressure wires in the pressure position would be with a rigid locking

6 shows a view of the setting magnets in a line printer,

7 parts of the device for rotating the key rod,

8 shows a schematic representation of the key rod,

9 shows a diagram of the magnetic excitation associated with each character,

Fig. 10 is a view of the print wire arrangement for the letter "C";

11 is an enlarged illustration of the characters produced by the printer.

The printing device has a rectangular bundle of sixty-three printing wires as the printing head 10. The pressure wires of each bundle are arranged in nine vertical and seven horizontal rows (Fig. 14) and each have a diameter of 0.23 mm. For the representation of a character certain Print wires moved a small distance in the direction of the recording medium, so that their The ends protrude slightly from the printhead 12. The sixty-three print wires of printhead 12 (Fig. 1) are led out fan-shaped in a wire guide 13 and form a single row λ-οη wires with a relatively large distance at the other end, the control end 14, which is in one Adjusting rail 16 is guided. The adjusting rail 16 is moved back and forth by two eccentrics 18 and 20, whereby the print wires in the wire guide 13 in each print cycle alternately on the recording medium to be moved and withdrawn.

Next to the control ends 14 of the pressure wires is a key bar 22 with a diameter of approximately 2.4 mm arranged. For each print head there is such a mechanism, which consists of a key rod and an associated controller exists. Each of the four sides of the key bar 22 is after provided with incisions 23 of a certain order. By turning the key rod around at a time 90 °, four groups of grooves can affect the control ends Ί4 of the pressure wires. When the tax end 14 of a pressure wire is in front of a groove in the key bar, is when moving sideways the adjusting rail 16 by rotating the eccentrics 18 and 20 of this pressure wire relative to the other Print wires not shifted lengthways. However, if the control end of a wire is on a If the remaining part of the lateral surface of the key rod 22 hits, the wire is in the wire guide 13 pressed in so that it protrudes from the end face of the print head.

Since the key rod 22 is used in four rotational positions and the longitudinal movement twelve lines of the punch card can occupy twelve positions, are 4 · 12 = 48 different ones Print marks can be displayed. The distance from incision to incision is only 0.5 mm, so that the total movement the key rod 22 in the longitudinal direction is a maximum of only 11 * 0.5 = 5.5 mm. Since the The key rod, however, always returns to an intermediate position as a rest position during each pushing process, is the actually required. Stroke less than 3 mm.

On one end of the key rod 22 there is a pinion 24 which is engaged by two toothed racks 26 and 28, which in turn are connected to an angle lever 30 (FIGS. 1, 5 and 7). Two magnets xind / control a differential lever linkage which, via the angle lever 30 and the toothed racks 26 and 28, brings the key bar 22 into one of its four rotational positions. The magnet / pulls z. B. an armature 32, which unlocks a transmission lever 34, whereby a slide 36 can move a push rod 38 upwards (see. Fig. 1, 5 and 6). As a result, the angle lever 30 is pivoted in such a way that it adjusts the racks 26 and 28 relative to one another in such a way that the key rod 22 is rotated through 180 °. Similarly, the magnet causes the racks to move in the opposite direction by an amount equivalent to a quarter turn of the pinion. When both magnets e and / are excited, a lever 40 adds the two opposite movements and transmits a movement to the racks which corresponds to a rotation of the key bar by 90 ° relative to its starting position. In this way, the combined excitation of the magnets e and / or the setting of the key rod in any of its four rotational positions.

The adjustment of the key rod 22 in one of its twelve longitudinal positions is accomplished in a similar manner by four magnets a, b, c and d and the differential lever linkage 42, 44 and 46. When the magnets α and c receive pulses, they cause a movement of the ends of the adding lever 42. The adding lever 42 is unequally divided by a joint connection with another adding lever 44, so that the movement of this joint under the control of the magnets α and c individually or combined is different. The magnets b and d similarly control the movement of the adding lever 46. Due to the articulated connection with the reversing lever 48, the latter has two arms of different lengths. Depending on the excitation of the magnets b, d or b + d , movement strokes of different sizes are transmitted from the reversing lever 48 via a connecting member 50 to one end of the adding lever 44. Since the key bar 22 is connected to the center of the adding lever 44, the movement of the key bar is equal to half the sum of the movements of the ends of the adding lever 44. The selective excitation of the four magnets a, b, c and d enables the longitudinal bracing of the key bar 22 in eleven sections of about 0.5 mm each over a total distance of about 5.5 mm.

The selected print wires are set in the first half of the print cycle by the Pendulum movement of the adjusting rail 16 or, in another embodiment, by the movement of the Key bar 22 towards the control ends 14 of the print wires. Then a pressure cam pushes the The cam disk 52 places a leaf spring clip 54 against the recording medium, whereby an imprint is produced will.

The six slides 36 for adjusting the key rod are used for the impression in the next Print cycle moved up during the second half of the print cycle. Adjusting the magnets a to / for the character to be printed during the next print cycle can already be used during the the first half of the print cycle. If the slide 36 is during the last 90 ° of the print cycle moved into its raised position and taken along the selected transmission lever and have thereby adjusted the key rod 22, the adjusting rail 16 effects the adjustment of the pressure wires during the first 180 ° of the following print cycle by touching the control ends 14 of the print wires 10 presses against the key rod. During the next 90 ° of the print cycle, the slides 36 will reverse and return all associated parts including the key rod 22 to the starting position.

5 6

Each wire guide 13 is an adjusting rail 16 to which printing wires are moved. The guide housing orderly. The in Fig. 1 and 2a to 2d demonstrates 68 for the key rods (Fig. 4) is in one clear embodiment of the invention are mounted in the frame, on which a pair forward Adjusting rail 16 guided friction wires, which are attached to the pressure-supporting plates 70 and 72, which are of the wires both in the printing position and again 5 eccentrics 18 and 20 are moved back and forth to move back. In the case of the in Fig. 3 a to 3 c and 4, the key rods 22 against the control ends 14 of the Illustrative embodiment of the invention loading pressure wires to lead. On eccentrics 18 and 20 moves the adjusting rail 16 a a wire reset, which is also still a wire reset slide 74 still attached more precisely in connection with those mentioned, which is also drawn back and forth by the eccentric is described. io is moved.

Each pressure wire 10 is connected to a friction wire on the wire guide 13 in an angled

64 connected, the impact 76 attached in a friction channel 62 through which the control ends 14 Adjusting rail 16 is guided. The friction wires are the pressure wires 10 going through. The stop 76 each with a sleeve 66 on the pressure wires 10 determined by the weight attached to the pressure wire consolidates (Fig. 2). The sleeves act at the end of the 15 78 the retracted position of the pressure wire. Of the Printing with the left edge of the fixed return slide 74 has an angled edge the wire guide 13 together to the print wires 80 through which the control ends 14 of the print wires go Go back to their home position at the end of the print cycle. To be returned in the return movement of the return. Slider 74 detects the edge 80 the weights 78 of the

As mentioned above, the adjusting rail 16 is through 20 pressure wires and leads the pressure wires into their outlet Eccentrics 18 and 20 reciprocated to return to the starting position.

from the wire guide protruding control ends 14 During the movement of the pressure wires in the

of the wires 10 against the key bar 22 to the first embodiment (FIGS. 2 a to 2 d) by the Because of the friction wires 64 controlled in a stationary guide housing, the return 68 takes place is appropriate. 25 position in the second embodiment (Fig. 3 a to

Dk Fig. 2a to 2d show the positions of the adjusting 3 c) by the reset slide 74. With both rails 16 at 90, 180, 270 and 360 ° of the print cycle. Guide forms are the pressure wires in the wire Fig. 2a, the control ends of the printing wires guide 13 are stored in which they are free in Längrichgegen the key rod 22 moves. The first two can move. While at the first off-print wires from below, this movement is carried out in an incision of the guide form of the invention Key bar penetrated while the upper one is bounded and stabilized by the friction wires 64, both of them Wires on the remaining jacket surface are correct in the second embodiment are. As a result, the two wire weights 78 become the stabilization of the printing wires. By groups different in their longitudinal direction - the inertia of the weights 78 can represents. With this setting of the printing wires, 35 printing wires are required for the printing Apply the two top wires from the surface of the wire print.

Bündeis pushed out in the print head 12. All pressure Fig. 3a shows the adjustment device at 270 ° des

wires are moved forward evenly when printing cycle. The guide housing 68 with the the adjusting rail 16 is away from the guide housing 68- key rods 22 is moved to the left of the control. In Fig. 2b, the adjusted wires have been moved away from the 4 ° end 14 of the printing wire 10, and the key bar withdrawn. The reset slide 74 with its edge 80 has the pulling the control ends of the print wires from the weight 78 with the print wire against the stop Key rod 22 moves the pressure wires for the 76. At around 90 ° of the cycle the parts have Imprint provided. assumed the position shown in Fig. 3b. the

In FIG. 2 c, the adjusting rail 16 is in its 45 eccentrics 18 and 20 have the reset slide 74 greatest distance from the key rod 22, in which and the housing 68 with the key rod 22 after the pressure wires are moved to the right by hitting the sleeves 66, and when hitting the keys, die left side edge of the wire guide 13 again unpaws 22 on the control ends 14, the pressure wires in be judged. brought the selected character print position.

In Fig. 2d, the adjusting rail 16 has already moved to 50. Fig. 3c shows the setting at 180 ° of the pressure die Key rod 22 is closed and the pressure wires cycle shortly before the impression. The eccentrics 18 and in the aligned state around a corresponding 20 have the housing 68 with the key rod and Route taken. the reset slide 74 moved to the left. These

The parts have the frictional resistance between the frictional positions at the moment before wires 64 and their associated friction channels 55 pressure knee.

62 in the adjusting rail 16 is sufficient to move the longitudinal movement of each key rod 22 is a spring 82 (Fig. 1)

to be assigned to the pressure wires in both directions, which act to return to the initial position if these wires are not caused in any other way. The spring 82 allows both a lateral to be retained, e.g. B. by hitting the movement of the key bar and the necessary key bar 22 or by hitting the 60 rotary and longitudinal movement during the setting, blow sleeves 66 against the left edge of the wire As already mentioned, the electromagnets control e

13th guide and / the angular position of the key rod

In the above-described embodiment of turning the key rod in one of the four setting items the invention was the position of the positions. This angular position becomes the key pressure wires controlled by the fact that the control ends 65 communicated via the pinion 24 rod through the the pressure wires by striking a fixed racks 26 and 28 at the correct intervals standing key bar can be moved. In a move away. The lower end of the key bar 22 modified embodiment (Figs. 3a to 3e and 4) is guided in a fork 84, which takes place at the adder the adjustment of the pressure wires by the lever 44 is attached. The fork 84 is on a guide key bar against the fixed control ends 70 slide 86 slidably mounted.

A rotatably mounted armature 32 is assigned to each of the magnets α to / (FIGS. 1 and 5). The armatures 32 work as locks for the transmission levers 34 and unlock the transmission levers 34 when the magnets are excited. Each transmission lever is rotatably connected to a stop 94. The L-shaped transmission levers each have a downwardly directed arm 88 on which the slides 36 engage when the transmission levers are released by the excitation of the magnets assigned to them. Upon release of a transmission lever 34 (Fig. 6) this pivots about the point at which it is rotatably connected to the lower end of its respective push rod 38 so that the downwardly directed arm 88 of the transmission lever under the action of the spring 90 into the range of motion of the slide 36 arrives. When the slide 36 moves upwards, the push rod 38 is carried along.

The downward movement of the push rods 38 is limited by the counter-stops 92 (FIG. 6) to which the guide 92o is attached. The lower end of the push rod 38 is formed by a stop 94 which slides with a finger in the slot of the guide 92a. A spring 96 acts on a projecting part of the stop 94, the other end of which is connected to the slide 36. The spring 96 ensures the downward movement of the push rod 38 until the stop 94 hits the counter-stop 92. The lever system is adjusted with the clamping screw 98.

During each print cycle, the slides 36 are moved up and down once. As a result, only the transmission levers 34 released by the magnets are taken along during the upward movement of the slide 36. If a transmission lever remains locked by the armature 32 assigned to it because the corresponding magnet has not been excited, the slide 36 corresponding to this transmission lever passes behind the arm 88 of this transmission lever without taking it with it.

The key bar 22 is rotated into its four rotational positions by exciting the magnets e and / or by exciting these magnets together. When the magnet / is excited, it rotates the key rod 180 ° from its normal rest position and offers one of its notched sides to the control ends 14 of the pressure wires 10. When the magnet e is excited, it rotates the key rod 90 ° their normal position in the opposite direction to present a second side of the key bar to the control ends of the pressure wires. When finally the magnets e and / are excited together, the key rod is rotated 90 ° into a fourth position to control the pressure wires. Fig. 8 illustrates the four positions of the key rod, and at the bottom of the drawing, the letters e, e + f, f indicate which magnets are excited in the corresponding position. Fig. 8 indicates which characters and letters are printed in the respective positions of the key bar. The distribution of the digits has been omitted for the sake of simplicity.

The magnets α to d either individually or in combination with one another control the longitudinal displacement of the key rod 22 in one of the twelve different positions. In Fig. 8, the scale in the lower part of the drawing indicates the twelve positions including the basic position into which the key rod can be moved.

The following table shows which magnets are used to adjust the twelve longitudinal positions of the key bar need to be excited:

position
the key rod Excited magnets 5 a + C 4th C. 3 a + b + c 2 c + b 1 a 0 No a + b -2 b -3 a + d -4 d 5 a + b + d -6 b + d

From the schematic shown in Fig. 9 it can be seen that the wires can be adjusted by energizing the magnet / printing the letter "C". When excited, the magnet / rotates the key rod 22 by 180 ° from its normal position into the "^" position, which is shown in FIG. 8 (right). Since none of the magnets for longitudinal adjustment of the key bar was excited, the key bar is in the position to form the letter "C".

The magnets can be controlled by means of a perforated strip 56 (FIG. 1) which is guided around a contact roller 118 and scanned by sensing brushes. The contact roller 118 is driven in a timed manner by the main pressure gear, and when perforations in the strip come under the sensing brushes 120 , electrical circuits to the appropriate magnets are closed in order to move the key bar 22 . In the present case, six actuators (magnets α to f) are necessary to set the key bar 22 to print the forty-eight characters shown in FIG.

The device according to the invention enables about four characters to be printed on a line length of 1 cm, and many printing units can be arranged next to one another, as is necessary for printing an entire line. An adjusting rail 16 is assigned to each wire guide 13, and the eccentrics 18 and 20 represent the common drive element for all adjusting rails which are required in the printer. In a printer for an entire print cell, either the control ends 14 of the print wires can be moved against a fixed key bar 22 or the key bars can be moved against the control ends of the print wires. Fig. 4 shows an apparatus for printing a complete line according to the second embodiment of the invention.

Given the large number of wire guides 13 arranged next to one another in a line printer, the arrangement of the control magnets α to / requires special measures. In this case, the magnets are arranged in groups of four as shown in FIG. In this way, the magnets can occupy a width of four pressure points. With this grouped arrangement of the control magnets, the differential lever system is the same as described above. The only difference is the shape of the four armatures, the locking ends of which extend upwards to the associated transmission levers.

Claims (6)

Patent claims: 1. Device for point-by-point recording of characters by means of a bundle of Printing wires of printing wires to be selected, the ends of which are used for printing the character as Pressure organs are used, the selection of the pressure wires by a combined stops having Means which cooperates with the control ends of the pressure wires, characterized in that, that the selection means a rotatable and adjustable in height, with perpendicular to its axis Incisions (23) provided Sctilüsselstange (22) is through the stopped The outer surfaces of the selected printing wires (10) can be moved into the printing position. 2. Device according to claim 1, characterized in that the by magnets (α to f) controlled differential lever linkage (38, 40, 42, 44, 46, 48) via a fork (84) and via a rack (26, 28) The engaged pinion (24) lift the key rod (22) into its setting position and turn it according to the desired characters. 3. Device according to claims 1 and 2, characterized in that one by means of eccentrics (18, 20) laterally reciprocating adjusting rail (16) the pressure wires (10) for adjustment leads against the key rod (22). 4. Device according to claims 1 to 3, characterized in that the adjusting rail (16) their movement by means of friction wires (64) guided in friction channels (62) on the pressure wires transmits. 5. Device according to claims 1 and 2, characterized in that the key rod (22) to adjust the pressure wires against the control ends (14) of the wires. 6. Device according to claims 1 to 5, characterized in that the wire guide (13) on the printhead (12) is only the width of a character. Considered publications: German Patent No. 674,701;
U.S. Patent No. 2,524,127. In addition 3 sheets of drawings © 009 630/8 10.