DE2003499B2 - PRESSURE HAMMER ARRANGEMENT - Google Patents

Description

003 499

pushes. At the end of the forcibly driven part of the stroke of the printing hammer 3, the electromagnet is 13 de-energizes and enables the stop arm 7 to be withdrawn under the action of Spring 15. After completion of the pressure stroke, the hammer 3 is returned to its starting position by the spring 16 brought back.

FIGS. 2 and 3 show a practical example of the use of the in FIG. 1 shown Printing set in a device for printing with a plurality of type wheels, wherein the band, the paper and type wheels have been omitted from these figures.

The F i g. 2 and 3 show a printing device composed of a frame 100 composed of a plurality by print hammers 103, which are guided by a pin 121 attached to the frame 100, which slides in slots 122 in print hammers 103. A second, made up of pins 123 and 124 existing guide is provided to ensure a parallel movement of the printing hammer 103. Each print hammer 103 has on its one side a recess or a slot 106, the a stop arm 107 guided therein by pins or pins 108 receives. The stop arm 107 is pivotably hinged at 110 to an arm 111 which carries an anchor 112 which is connected to a whole at 113 indicated electromagnet cooperates. Each magnet 113 controls the action of four pressure hammers 103. For this purpose, each anchor support 111 is connected to four stop arms 107, the slots 106 in opposing surfaces of the respective print hammers 103 are provided. The anchor bracket 111 is pivotably articulated at 114 to the frame 100, Each armature support 111 is provided with a return spring 115 which pivots at 114 and at 127 presses on part of the frame 100.

Below the print hammers 103 a rotatable stop drum 117 is arranged, which on its circumference has a plurality of stop lugs 118 which sit in recesses 130 in the drum and consist of any suitable material. The drum 117 is in a ball bearing at each end 131 and a needle bearing and is driven by an electric motor arranged inside it 132 driven, the shaft 133 of the motor by means of a multiple gear 134 and one on the Stop drum 117 attached internal tooth ring 135 is coupled to the stop drum 117.

The F i g. 2 also shows a synchronization device 140, which ensures that a stop arm 7, 107 can only be actuated during the intervals between the times at which ... a stop lug 18, 118 passes under a stop arm, and which also ensures that the magnets 13, 113 one A plurality of stop arms 7, 107 are operated one after the other to avoid excessive peak values of to avoid current energizing the electromagnets and speed fluctuations due to absorption reduce the kinetic energy of the stop drum 17, 117 by the stop arms 7, 107.

It will be understood that numerous changes and modifications can be made to the above embodiment are without departing from the inventive concept. For example, the electromagnet 113 according to FIG F i g. 2 and 3 for the actuation of one or two pressure hammers are used, the Use of four pressure hammers is preferred.

1 sheet of drawings

Claims (1)

1 2 The subject of the invention is explained in more detail below in patent claim: connection with a drawing; in the drawing shows Print hammer assembly with an electric Fig.l a schematic representation of a Magnets for moving one end of the 3 printing set of a printing one according to the invention Stop arm against the effect of a hammer arrangement, Return spring into or out of the path of the one end view of a printing device in FIG a constantly rotating stop drum using a plurality of brought back stop lugs, characterized by hammer arrangements according to Fig.l, but underlined that the stop arm (3; 103) with io omission of Tvpenwheels, tape and paper, and his not in the Path of the stop lugs (18; Fig. 3 is a section along the line ΠΙ-ΙΙΙ the 118) bringable end (10; 110) with a Fig.2. Armature (12; 112) of the electromagnet supporting Jn Fig. 1 is a character wheel 1 shown, which with Arm (11; 111) is pivotally connected, and a band 2 and a print hammer 3 for one that the stop arm (7; 107) through an impression of the on an elevation of the print recess (6; 106) of a print hammer (3 : 103) Hammer 3 opposite type wheel 1 is located! it reaches through and is guided in this recess by a character 5 on paper or other ge-projections (8: 108) , the suitable material 4 in a generally known manner / ii-print hammer <3; 103) close to that in the path that interacts. The print hammer3 is between s *
Stop lugs (18; 118) bringable end (10; 20 nen ends with a slot or a Ausspn- 110) of the Stoppar Nes is anoidnet. tion 'S , through which a stop arm 7 hir - which is guided through projections 8 in the slot 6. The stop arm 7 is free at its end ¹ and is pivotable at 10 on an arm 11. 25 directs the armature 12 one at 13 Dargeste! '; η Electromagnet carries. The arm 11 is pivoted at M on a frame or housing (not shown). The stop arm 7 is indicated by the arrow The invention relates to a pressure 30 interpreted Rieh ung into the slot in and out of the hammer assembly with an electromagnet to this out and is by moving one end of a stop arm 11 and part of the frame acting against the Action of a return spring in the spring 15 in its (in Fig.l in dashed line or out of the path of the shown on a constantly rotating; depressed; retracted position. Stop lugs 35 attached to the stop drum ). Drum 17 is provided, which has a plurality of The invention has the object of providing a rem circumferentially spaced Anschkgr.asen thus has 18 aufderartige print hammer assembly to comparable. The stop drum 17 is located in a way that is easy to improve and that the number of rotations to be constant is in the moving links shown by the arrow and thus the direction to be moved. The above-described device works as The following is simplified in terms of design and manufacture: will. In the retracted position To solve this task, the low-impact? If the electromagnet 13 is not energized, the print hammer arrangement according to the invention is 45 and the lugs 18 of the stop drum 17 move so that the stop arm with its not into the one below the end 9 of the stop arm 7.
Bahii the stop lugs can be brought with an end in this way, no printing takes place. Around the armature of the electromagnet carrying arm to bring about a printing by the printing set, is pivotably connected, and that the stop arm, the magnet 13 is excited, whereby it pulls the armature 12 through a recess of a printing hammer and moves the stop arm 7 downwards, engages and in this recess through the front to the end 9 of which jumps are guided into the path of the stop lugs 18 , the print hammer protruding close. As a result of the rotation of the stop drum 17 of the end that can be brought into the path of the stop lugs, a stop lug 18 strikes at the end 9 of the Andes stop arm. low-impact 7, moves the print hammer to the print hammer arrangement 55 according to the invention at the front (ie to the left in Fig.l) and causes it to require - in contrast to the print hammer arrangement known at the beginning as the paper 4 and the tape 2 against the writing mentioned - no Chen 5 to press on the type wheel 1 and thus the nerlei intermediate or coupling links more and the printing of the character 5 on the paper is hereby significantly simplified. Bring along those to be moved. Overall masses are small, so that the elec- tromagnets can be designed to be weaker and there- fore phases. In the first phase, it will use less electrical energy due to the Anmit. It loading beater by means of the stop lug 18 may for about also no special requirements with respect to 60 ° / o of its stroke is forcibly driven in the fall times of the electromagnet because the JE second phase, the hammer moves under eigeweiligc instantaneous position of the armature Just swing forward and the Palich engages the position of the end of the arm relative to the pier 4, whereupon it influences the guide in the slot in the third phase without any movement of the paper together with the belt 2 to hinder the print hammer. against the character 5 on the type wheel 1