DE2166747A1 - FAST PRINTER - Google Patents

Description

Dipl.-Ing. Heinz Lesser, Dipl.-Ing. Otto wing. Patent Attorneys D-8 Munich 81, Cosimastraße 81

Kabushiki Kaisha Suwa Seikosha, 3-4, 9 1 fi R 7 Zi 7 4-chome, Ginza, Chuo-ku, Tokyo (Japan) * - ^log ' ^H '

Shinshu Seiki Kabushiki Kaisha, 3-5,

3-chome, Yamato, Suwa-shi, Nagano Fl / km

(Japan)

High-speed printer

The invention relates to a Sehnell printer space-saving Construction with a continuously revolving pressure roller having rows of letters, numbers and / or similar symbols and a ratchet wheel which is driven synchronously with this and to which one of the number of rows of symbols corresponds Number of Druckhämraern is assigned, which is on a ribbon and on a strip of paper to be printed on The pressure roller come to a stop.

It is therefore a DrXicker, in which the pressure occurs "on the fly", d. H. the print roller moves continuously while the print hammer is taking accordingly press the synchronized movement very briefly over the ribbon and paper on the print roller. The faster this striking happens, the clearer the script becomes.

The paper strip is only fed by the paper feed device in the intervals between the printing of two consecutive Lines of characters moved forward during the actual printing of a line by the paper feed device from seen held. The paper feeder pushes the paper through the two guide parts, which are arranged one above the other, which attach the paper to the Redirect pressure point. The printed paper strip will

509849/0390

Dipl.-Ing. Heinz Lesser, Dipl.-Ing. Otto Flügel, Patent Attorneys D-8 Munich 81, Cosimastraße 81

No longer grasped behind the pressure point, it reaches the access of the user of the printer outside of the housing.

As explained in more detail below with reference to FIGS. 10 and 11 the distance between the two guide parts arranged one above the other is considerably larger than the thickness of the paper strip. Here, on the one hand, manufacturing tolerances must be observed, and on the other, should the paper can be threaded with as little effort and effort as possible, so that the printer is designed to save space does not lose its handiness.

In the known guide, the paper strip between the two guide parts a variety of different Take up webs of different lengths of paper correspond between the feeder and the point of pressure. So does the paper move during the Pressing a line due to jarring or like influences between these paths, the characters in a row are no longer aligned, which is true for the printed image is detrimental and a relatively large minimum line spacing requires ..

The invention is intended to provide a printer of the type mentioned at the outset which is convenient to use without the risk of the characters in a line being offset in height from one another.

According to the invention, this is achieved by a paper guide from an upper guide part and a correspondingly facing lower guide part, on each other opposite guide surfaces a plurality of projections is provided, the projections of the upper

509 849/0390

Dipl.-Ing. Heinz Lesser, Dipl.-Ing. Otto Flügel, Patent Attorneys - D-8 Munich 81, Cosimastraße 81

_3 _ 21667A7

Guide part compared to those of the lower guide part are arranged offset and a gap remains free between the two guide parts, the clear width of which is approximately the same as the thickness of the paper.

Through these running in the conveying direction of the paper, laterally Projections arranged offset from one another succeed it is possible to set a relatively small gap even if the two guide parts are not exactly spaced apart from one another, which corresponds approximately to the thickness of the paper, while the gap is seen in absolute terms, i.e. following the curvatures, relatively is wide. Since the paper can yield to the curvatures to a certain extent, it is not only easy to thread, but also slide through the guide with little friction. The relatively small contact surfaces on the crests of the grooves also prevent the paper from sticking to the guide surfaces.

A number of other features that benefit the handiness of the device in terms of operation and maintenance, can be found in the description of the exemplary embodiment.

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Dipl.-Ing. Heinz Lesser, Dip! - lng. Otto Flügel, Patentanwälte ■ 0-8 M '"inciT? N 81. Cosima ^ rasse

Figures and 2

perspective views of the embodiment;

Figure 3

Fig. 3 is a perspective view of the paper feed and ribbon feed mechanism;

Figures up to 6

Functional representations of the example according to FIG. 3;

Figure 7

Fig. 3 is a perspective view of the ribbon displacing mechanism for changing the printing color;

Figures and 9

Functional representations of the example according to FIG. 7;

Figure 10 is a partial view of the paper guide in a conventional printer;

Figure 11

a section of a printed paper strip, which is in the top line with an inventive Printer achieved print result and in the bottom line a with a conventional Printer shows the print result achieved;

Figures and

Partial views of the embodiment of the paper guide according to the invention;

Figures and

perspective views of the storage of the Pressure roller of an embodiment;

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Dipl.-Ing. Heinz Lesser. Dip! - lng. Otto wing. Palentanwä'te ■ D-8 M \ inch3n 81, Cosirr.aslraße 81

FIG. 16 shows a schematic partial section along the axis of the ratchet wheel and the drive device of the embodiment;

FIG. 17 is a partially sectioned perspective view of a magnet unit of the embodiment;

characters

18 and 18a a partial perspective view and a

Section through this of a display device

of the embodiment.

Figure 1 shows a first perspective view of the embodiment , 101 and 101 'being the main frame parts of the Housing, 102 is a guide plate for guiding the hammer lever 3 in a certain position; 5 is a Pressure roller, 108 a paper, 112 a paper guide roller for conveying the paper, 113 an ink ribbon and 114 a spool for the ribbon.

Figure 2 shows a further perspective view of the embodiment seen from the other side, on v / elcher a motor device designated as a whole by 105 is arranged.

Figures 3, 4 and 5 are perspective and side views, respectively, of the paper feed mechanism and ribbon feed mechanism. 131 is a paper feed ratchet mounted on the paper feed shaft 132. 135 is a rubber paper feed roller. The paper feed pawl lever 133 is rotatable on the paper feed lever 136 by means of a bolt mounted. The paper feed lever 136 is held shifted downward by a spring 153. A rack

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Dipl.-Ing. Heinz Lesser, Dip! - Ing. Otto Flügel, Patent Attorneys ■ D-8 Munich 81, Cosimastraße 81

137 with teeth 137-1, which can be designed as saw teeth, is rotatable on the paper feed lever .136 by means of a bolt

138 and is counterclockwise by a spring

139 swiveled away. A lever 143 operated by the paper feed solenoid is rotatable on the paper feed lever 136 supported by a bolt 14 5 and biased clockwise by a spring 139. An armature disk 144 of the solenoid 150 for paper feeding is arranged on the lever 143. A gear 146 is coaxially non-rotatable attached to the platen 5 and engages the teeth 137-1 of the rack 137. The gear 146 is in one A certain reduction ratio is driven by the motor axle 147 via the intermediate gear 151. An ink ribbon feed lever 148 is pivoted clockwise by the spring 149 and is rotatably mounted on the axle 141.

FIG. 4 shows the position in which the paper and ink ribbon are advanced and the printing process has ended. The gear 146, which is coaxially attached to the platen 152, is engaged with the rack 137 which is rotatable on the paper feed lever 136 is arranged by means of a bolt 138, disengaged, since one end 143-1 of the lever 143 in an incision 137-3 of the rod 137 engages. The gear 146 and thus the pressure roller 5 are continuously driven by the motor 147 via an intermediate gear 151 in a certain reduction ratio driven.

Figure 5 shows the position of the paper feed mechanism and the Ribbon feed mechanism when the solenoid is energized. When the electromagnet 150 is energized, the armature disk actuated, and the lever 143 associated with the solenoid moves counterclockwise to the Feed paper. The end 143-1 of the lever 143 slides out the notch 137-3 of the rod 137, whereupon this is below

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the force of the spring 139 rotates counterclockwise. As a result, the constantly moving wheel engages 146 into the toothing 137-1. The paper feed lever 136 receives the power to feed the paper from the gear through the rack 137, and the rod 137 slides guided by bolts 141 and 142 and the paper feed point 132 down in order to store corresponding energy in the spring 153. Due to the movement of the paper feed lever 136, a protrusion 136-1 of the paper feed lever 136 engages the ribbon feed lever 148 through the flat part thereof 14 8-2, whereby energy for feeding the ink ribbon is stored in the spring 149. When the paper feed lever 136 is in the predetermined position is lowered, a part 137-2 is based on the Rod 137 drives motor shaft 147. Then the rod moves clockwise around bolt 138 and teeth 137-1 slide from gear 146. The incision 137-3 of the rod 137 and the end 143-1 of the lever 143 engage under the force of the Spring 139, in the starting position, one into the other. The paper feed lever 136 goes under the stored force of the Spring 153 back to its original position.

The mechanism for winding and reversing the ribbon will be through the flat part 148-1 of the lever 148 by means of the stored Energy of the spring 149 abuts and winds the ribbon and reverses it.

The paper feed mechanism will be described in conjunction with FIG. The ratchet wheel 131 for the paper feed is moved by the pawl lever 133 or its pawl by one tooth pitch, whereby the paper is advanced by one line will. To advance the paper exactly one line "is the paper feed mechanism is designed in such a way that the ratchet wheel 131 for paper feed is held by the pawl 133-1 of the ratchet lever 133, the relevant tooth of the ratchet wheel

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Dipl.-Ing. Heinz Lesser, Dip! - lng. Otto Flügel, Patent Attorneys D-8 Munich 81, Cosimastraße 81

for paper feed, a flat portion 133-2 of the latch lever 133 and the shaft 132 for the paper feed. The design of the paper feed mechanism is such that the The paper feed roller does not rotate beyond the angle corresponding to a tooth pitch due to its moment of inertia. In addition, the rotation of the paper feed roller is acted upon by force due to the normal direction of rotation for the printing inhibited.

Figure 7 is a perspective view showing the ribbon supply, shows the setting mechanism for changing the color of the ribbon. 136 is the paper feed lever, 155 a ribbon feed lever, 156 a ribbon shift lever, 157 a ribbon shift lever spring, 158 an electromagnet for moving the ribbon, 160 a Lever which is connected to an armature disk 159, which is assigned to the electromagnet 158, 161 finally is one Spring connected to lever 160. 162 is a bracket, on which the Zwisehenζahnrad 151 is mounted and on which the springs 157 and 161 are held.

The following explains the offset of the ink ribbon for black and red printing. Figure 8 shows the state for the Printing with black color.

The solenoid 158 is not energized. This makes printing in black color because of the ribbon transfer lever 156 and the ribbon displacing lever 156 and the ribbon guide lever 155 are not operated. As long as the command 'for red printing is not given to the electromagnet, the notch 160-1 of the lever 160 of the electromagnet engages in the notch 156-2 of the Ribbon shift lever 156 on; the ribbon guide lever 155 is not operated. Therefore there is no color band violation.

In order to be able to print in red, as shown in FIG. 9, the Solenoid 158 energized by the red print command. the

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Dipl.-ing. Heinz Lesser, Dip! - lng. Otto Flügel, patent attorneys C-E Munich 81. CosfmastraHe 81

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Armature plate 159 is actuated causing the ribbon displacement solenoid lever 160 to rotate counterclockwise about the bolt 163, about the ribbon displacement lever 156 to solve. The lever 156 moves the ribbon guide lever 155 by means of the force of the spring 157 above and brings the red ribbon into the position required for printing.

When the paper feed lever moves down by pressing connecting the wheel 146 to the rack 137 after the printing is finished with red, a protrusion 136-2 engages of the paper feed lever 136 - at one end 156-1 of the ribbon displacing lever at. Thereupon, the ribbon guide levers 155 and the ribbon displacing lever 156 move to their original position Location. The notch 156-2 is again received in the notch 160-1 of the lever 160. That’s the way he is Ribbon mechanism in such a state that red cannot be printed.

Reference is made to FIG. 6 to describe the relative movement between the rack 137 and the gear 146. When the rack 137 engages with the gear 146 and moves downward, it becomes a counterclockwise direction acting moment of force exerted on the rack 137, because the line of action 200 (Figure 6) of the force that the gear 146 exerts on the rack 137, on the left side of the axis of rotation 138 of the rack in the starting position passes by. The moment causes the rack to rotate counterclockwise, which makes the rack 137 even tighter is brought into engagement with the gearwheel.

In the course of the throwing off movement of the rack, the Rotation shaft 138 of the lever 137 of the line of movement 200 until it crosses it. Right now the rack is getting

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Dipl.-Ing. Heinz Lesser, Dip .'.- lng. Otto Flügel, patent attorneys ^; L) -ti Munich 81, Cosimastraße 81

137 of the gear 146 is a growing clockwise direction Moment and pivoted in this direction of rotation. The rack 137 is pushed down until the flat part 137-2 of the rod on a release element, which is formed here by the motor shaft 147, runs.

The drive device for the paper feed mechanism and the ribbon mechanism consists essentially of one rotating body having a ratchet 146, a transmission device, comprising a paper feed lever 136 and a rack 137, a first locking device having a Lever 143 of the solenoid and a spring 139 includes a first control device that includes a solenoid 150 a release device comprising a motor shaft 147 and a flat portion 137-2 of the rack, spring means for ribbon and paper feed, the springs 153 and 157, a second locking device, the one Shoulder 156-2 of ribbon displacing lever 156 and a solenoid armature 160, and a second control device which includes the electromagnet 158.

The advantages of this aforementioned training are set out below. The ones for winding and reversing the ribbon as well as energy used to change the color of the print and to guide the paper, is supplied by the motor shaft of the printer. The control device is only used to control the ribbon feed, used for paper feed and color change; therefore the electromagnet can operate with a minimum electrical power work and be built accordingly small, which has an overall effect on the desired space-saving The structure of the printer.

The transfer device, the release device and the first Locking devices are combined and operated on a lever

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Dipl.-Ing. Heinz Lesser, Dip! - Ing. Otto Flügel, Patent Attorneys ■ D-3 Munich 81, Cosimastraße 61

solidifies. The drive device for feeding the paper and the ink ribbon can be independent of the printing body Assembly are summarized, v / as the assembly is very simplified. ·

The drive wheel for the printing roller also serves as a drive device for paper feed and ribbon movement. Furthermore, the release device also serves in part as the motor shaft of the printer. The result is that the required number of parts and construction is reduced is simplified.

The rotary body used to drive the paper feeder and the ribbon feeder are not connected directly to the motor shaft of the printer, but coupled to the motor shaft in a reduced manner; therefore the The printer starts up automatically even if it is overloaded. In this way, a printer of high reliability can be obtained.

The rack 137 is fixed at the beginning of the engagement phase pressed into the gear 146 and slides easily and safely out of engagement with the gear 146 when reaching out, since the rotational force acts on the rack at the end of the engagement phase in such a direction that the sliding is accelerated. In addition, the release part 147 is not required to exert a great deal of force, so that the wear and tear of the Release part 147 is reduced.

Reference will now be made to the paper guide device taken. ,

Figure 10 is a side view of the embodiment, but equipped with a conventional paper guide. 5 is the platen that rotates continuously. The printing marks

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Dipl.-Ing. Heinz Lesser, Dip! - lng. Otto Flügel, Patent Attorneys D-8 Munich 81, Cosimastraße 81

2186747

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202 are arranged on the circumference of the pressure roller 5. The hammer 3 flies to the print mark on the print roller 5. 4 is a rotary shaft of the hammer, 205 is a drive wheel that feeds the pressure-sensitive paper step by step, 112 a paper feed roller which is pressed against said drive wheel over the paper. 207 and 208 are corresponding an upper and a lower paper guide for guiding the paper between the hammer and the platen 209 is a pressure-sensitive paper, the thickness of which is d. A variety of print hammers are according to the number of the columns to be printed arranged in parallel. Each hammer of the hammer device is aligned with the position of the desired one Print mark on the continuously rotating print roller. When the print mark to be printed is in the appropriate position arrives, the respectively assigned hammer flies in a pivoting movement in order to carry out the printing process. Per rotation of the platen 5, a whole line is printed on the paper 209.

Irregular printing as shown in Fig. 11 is caused by the fact that the paper faces each other the normal position, which is aligned with the hammer 3, shifts during one revolution of the pressure roller.

The irregularity of the print increases as the distance between the upper and lower paper guides increases 207 and 208 compared to the paper thickness d. The paper 209 can travel along path M or N between the upper paper guide 207 and the lower paper guide 208 pass through although the paper is in the predetermined position by the paper feed wheel 205 and fed by the paper feed wheel 112 to be driven.

BAD ORIGJNAL

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Dipl.-Ing. Heinz Lesser, Dip! - lng. Otto Flügel, patent attorneys D-S. Munich 81, Cosimastrabe 81

Accordingly, printing can be done when the paper 209 along the path M once and along the other the path N is located. It follows that the printed characters do not get into a flush line. On the other hand, is the distance s between the upper paper guide 207 and the lower paper guide 208 is equal to the paper thickness d, so an irregular Printing does not occur.

However, if s is smaller than d, the paper can enter the space must not be used by the guide. In the case of mass production, it is very difficult to determine the distance s between the Paper guides only slightly larger over their entire length than the paper thickness d.

The irregular printing is to be eliminated by making the distance between the paper guides nearly equal to the Paper thickness d is made.

FIG. 12 shows a side view of the exemplary embodiment with a configuration of the paper feed which is different from the prior art; FIG. 13 shows a partial cross-sectional view of the object according to FIG. 12. On the upper and lower paper guides 207 and 208, projections 207a and 208a are offset from one another in the feed direction ^. provided, as shown in FIG. The aforementioned irregular printing is eliminated by making the distance t between the projections 207a and 208a almost equal to the paper thickness d. Is due to manufacturing inaccuracies t. less than d or even less than or equal to 0, the flexible paper can nonetheless be inserted into the gap between the guide egg and "softly" moved forward. In this way, mass production is facilitated. Furthermore, the paper can be calibrated even when the printer is subjected to sudden changes in ambient temperature and that

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Dipl.-Ing. Heinz Lesser, Dip! - lng. Otto Flügel, Patent Attorneys ■ D-8 Munich 81, Cosimastraße 81

Paper will stick to the paper guide if the temperature reaches the dew point.

Figures 14 and 15 show a simple embodiment for attaching the platen to the main body. This design takes into account the needs of the user, the pressure roller to be able to change the print mark pattern. At the top of the main body 101 of the printer bores 401 with insertion openings 400 are provided. The jacket of the bearing 402 for the shaft of the pressure roller has Flats 405, which run parallel to one another, as shown in FIGS. 14 and 15, around the bearing 402 into the insertion opening 400 to be able to use. To attach the platen to the main body as shown in FIG the flats 405 become aligned with the insertion opening held, and the bearing 402 is pushed down until it has entered the bore 401. then - as shown in Figure 15 - the bearing 402 is rotated by about 90 with respect to the insertion opening 400 of the main housing, and an L-shaped retaining bar 406 is put on to secure the inserted bearing to the housing. This construction enables easy replacement of the platen and paper feed roller; it is also suitable for mass production very advantageous. Finally, it is used for convenient handling by the user.

Figure 16 shows devices for securing the power transmission shaft 116, which is mounted coaxially with the ratchet wheel 1 on the main frame 101 and 101 'of the printer housing. the Power transmission shaft 116 is attached to the main housing by means of bearings 117 and 117 'in such a way that the flange parts 117-1 and 117'-1 on the outer sides of the Main housing 101 and 101 'are located. Since the diameter of the hole 172 in the main housing is larger than that of the pawl

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Dipl.-Ing. Heinz Lesser, Dip! - Ing. Otto Flügel, Patent Attorneys - D-8 Munich 81. Cosimastraße 81

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wheel 1, the ratchet wheel can be connected to the motor mechanism 105 easily assembled and disassembled after assembly. In general, the cross-sectional shape of the Ratchet wheel asymmetrically, so that an undesirable imbalance is generated during high-speed rotation that covers the entire printing mechanism. Therefore, it is desirable to check the printer imbalance including the Switch off the motor and the ratchet wheel. In the present embodiment, the flywheel 171 is for balancing connected to the rotor of the motor. After eliminating the unbalance of the motor with the flywheel and ratchet wheel these combined as a unit. This construction is suitable for mass production. As shown in Figures 2 and 3, the shaft of the paper feed roller 112 is pushed into the bearings the openings 118 and 118 ', which are on the lower part of the main housing 101 and 101 'are provided, are used. That's how it is Assembly and disassembly of the parts very easy, this is also very advantageous for the production.

The solenoid device 11 for operating the control lever for operating the print hammers requires a relatively large space inside the printer. The electromagnets are arranged symmetrically about the center line of the printer. Further, as shown in Figure 17, the electromagnets are in a zigzag shape on the base 190 of the electromagnets attached so that a number of electromagnets are housed in a small space.

Figures 18 and 18-a show a display device of the Embodiment which specifies the control of the ratchet wheel and the pressure roller. The display device includes a Light barrier, which is formed with the help of two semiconductors. 120. Is a transmitter semiconductor, for example a light-emitting diode, which is embedded in the base plate 121. 122 is a

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Dipl.-Ing. Heinz Lesser, Dip! - lng. Otto Flügel, Patent Attorneys - Ρ-β Munich 81, Cosimr.strasse 32 81

Recording semiconductor, for example a photo element, which is held in the base plate 121 '. Between the semiconductors 120 and 122, a shielding disk 125 is provided, which is arranged on the ratchet wheel shaft 116. With the conventional Type of printers, magnetic devices such as magnetic heads are used to determine the positions of the print characters that should be printed. Since these magnetic devices require a large space, they can be used in Space-saving printers cannot be installed. The display device of the type reproduced here, which the If semiconductor elements are used, this deficiency is eliminated. The semiconductor elements are connected to an electronic control circuit connected, which is arranged in the base plate.

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Claims (4)

DipWng. Heinz Lesser, Dipl.-Ing. Otto Flügel, patent attorneys ■ D-ö Munich 81, Cosimastraße 81 PATENT CLAIMS 1. High-speed printer of space-saving design with a letter, Numbers and / or similar rows of symbols, continuously revolving pressure roller and one with this synchronously driven ratchet wheel with a number of print hammers corresponding to the number of rows of symbols is assigned to the one over a ribbon and over one too printing paper strips come to a stop on the print roller, which paper strip between two on top of each other arranged, approximately parallel guide parts is guided, characterized in that that on the opposite guide surfaces of the guide parts (207, 208) a plurality of projections (207a, 208a) are provided, the projections (207a) of the upper guide part (207) opposite the projections (208a) of the lower guide part (208) are arranged offset and free a gap between the two guide parts remains, whose clear width corresponds approximately to the thickness of the paper. . 2. Printer according to claim 1, d a d u r c h g e ken η draws that the ratchet wheel (1) with the motor drive shaft (116) and possibly a flywheel (171) is connected to a unit, which in the area between the motor and the ratchet wheel, a bearing (117) with a Has flange (117-1) which can be inserted into an opening (172) of one housing part (101 '), the diameter of which is greater than the largest dimension of the ratchet wheel in the diameter direction. BAD ORIGINAL 0 9 8 4 9/03 9 0 Dipl.-Ing. Heinz Lesser ,. Dipl.-Ing. Otto Flügel, Patent Attorneys ■ D-8 Munich 81, Cosimastraße 81 3. Printer according to claim 1 or 2, characterized by a display device for timing pulses, the radiating and radiation-sensitive Having elements (120, 122) which are formed from radiating or radiation-sensitive semiconductors, wherein the semiconductors are attached to a base plate (121, '121') which also has an electronic circuit for Contains control of the elements, with a rotatable between the radiating and the radiation-sensitive element Shielding disc (125) is inserted. 4. Printer according to one of the preceding claims, that the printing roller (5), on the outer surface of which is printed characters (202) are arranged. Has pivot bearings (402) which are flattened on two sides, so that the distance between the Flats (405) of a bearing is not larger than the width of insertion openings (400), which feeds to Form bores (401) in the housing of the printer that receive the bearings. 509849/039