DE1065431B - Friction clutch with expanding ring for coupling the platen with the line index wheel of a writing or printing business machine - Google Patents

Description

GERMAN

The invention relates to a friction clutch with an expanding ring for coupling the platen with the Line indexing wheel of a writing or printing business machine, the expanding ring by pivoting a tensioning lever can be spread around an axis lying transversely to the platen axis. the The purpose of the invention is to design a friction clutch of this type in such a way that the contact pressure is accurate adjustable and easy to readjust. This is achieved according to the invention in that the tensioning lever is mounted adjustable in the direction of the axis of the platen.

The invention is illustrated in the drawing, for example, namely shows

Fig. 1 is a longitudinal section through one end of a platen with the coupling,

Fig. 2 is a left side view of Fig. 1 along line 2-2 in Fig. 1 after removing a cover plate and

Fig. 3 is a side view similar to Fig. 2 of an embodiment with a two-part expanding ring.

In the core 1 of the platen, which carries the roll cover 2, a cover plate 3 is attached at the end, which is firmly connected to a holding plate 4. A nut 5 is non-rotatably mounted in the holding plate 4. The roller axis 6 is through a conical surface 7 in the Lens 3 held and by means of a win'deteües 8 screwed into nut 5. The roller axle 6 is in the side part 9 of the paper carriage, not shown stored in the typewriter. With the roller axis 6. The rotary knob 10 is firmly connected.

The piercing axis 11 is passed through a longitudinal bore in the roller axis 6 in a longitudinally displaceable manner, the end of which is firmly connected to the coupling button 12. Inside the roller knob 10 is a helical compression spring 13 attached, which presses the clutch button 12 outward. On the inner part of the piercing axis 11, a spring ring 24 is attached, which is against the threaded part 8 of the Roller axis 6 sets and the basic position of the piercing axis 11 against the pressure of the spring 13 secures.

A clamping cone 14 is attached to the inner end of the lancing axis 11 and is inserted into a cylindrical part 15 transforms. In the embodiment according to Fig. 1, the tip of the clamping cone 14 is directed outwards.

In the coupling position, a clamping lever 16 is located on the cylindrical part 15, preferably by means of a roller 17 mounted on it. The inner end of the tensioning lever 16 is in a cutout 18 of a Insert 19, which is fastened in the roller core 1 or on the cover plate 3 by connecting strips is guided and thereby secured against lateral movement.

The clamping lever 16 is on an eccentric 20 ge friction clutch with expanding ring

for coupling the platen

with the return wheel one

writing or printing

Business machine

Applicant:

Adlerwerke vorm. Heinr. Kleyer

Corporation,
Frankfurt / M., Kleyerstr. 17th

Alexander Lehmann f, Bischofsheim (Kr.Hanau),
has been named as the inventor

'stores, "whose axis is transverse to the platen axis · 'The eccentric 20 is on a bolt 21, which is rotatably mounted in an end plate 22 and can be determined by a nut 23 (Fig. 3). By

. Rotation of the bolt 21 can by means of the eccentric 20 of the clamping lever 16 in the direction of the platen axis adjusted. The end plate 22 is screwed into threaded holes 35 in the Engage cover plate 3, releasably connected to this. The opening in the end plate 22 to The mounting of the clamping lever 16 can be closed by an easily detachable resilient cover ring 39 will.

The arm 25 of the clamping lever 16 engages between the ends of the expansion ring 26, which is in one piece according to FIG or according to Fig. 3 consists of two parts 26 '. The expansion ring 26 is through when the clutch is closed the arm 25 according to FIG. 3 is pressed with its outer surface against the inner wall of the line switching wheel 27. The line index wheel 27 is mounted on the end plate 22. The line index wheel 27 and the expanding ring 26 are held on the end plate 22 by a cover plate 34. The top plate 34 is with the end plate 22 connected, preferably by the same screws that are in the threaded holes 35 in the Cover plate 3 are screwed in and thereby

■■.; W ■■:.-.- . ■ -. ' . 909 628/10

At the same time, connect the end plate 22 'with' ^{1 of} the closing disk 3 ''!, I- . ·. ■. ■

A driver pin 2.8 is attached to the end plate 22, the protruding end of which according to Fig. 2..in, an opening 29 in the spreader 26 ceingreift or 3 in fig as a stop for the ends of the two-part ", serving Spreizringes26 'However, entrainment can occur caused by the drive pin 28 by the arm 25 ^f.. . "'' ■

Becomes the expanding ring. 26 by; 'pressed the arm 25 in the spread position:.; a frictional connection between the line index wheel 27 and the platen roller 2 via the expanding ring 26, the driver pin 28 and the end plate 22 is thereby established.

The bolt 21 is, as Fig. 1 shows, arranged close to the line index wheel 27 so that it can be adjusted from the outside. This facilitates the correct setting of the clutch on the one hand for a reliable connection between the line switching wheel 27 and platen 1, 2, and on the other hand for easy release of the clutch. ^; · '■■ - ·'

When you press the clutch button 12, the Lancing axis 11 shifted inward with the clamping cone 14,. the roller 17 on the clamping cone 14 unrolls and the clamping lever 16 can pivot in the left direction according to Fig. 1. This can result move the arm 25 outwards, whereby the expansion ring 26 is relaxed and the coupling is thus released. When the clutch button 12 is released, it is pressed outward by the compression spring 13. Through this the lancing axis 11 is shifted to the left, whereby the roller 17 by the clamping cone 14 after pressed on the outside and held in this position by the cylindrical part 15 of the clamping cone 14 will. In order to keep the adjustment forces low, the tensioning lever 16 is preferably designed to be resilient. When the arm 25 has reached its end position after the expansion ring 26 has spread, the clamping lever can 16 for the rest of the stroke, which is given to him by the clamping cone 14 is granted, resiliently give way.

It is possible to omit the compression spring 13. The clutch button 12 must then by hand in the Coupling position are moved back.

Claims (6)

1. - 1. - p _{RESPONSE PRESS (} ) _C HE: 1. Friction clutch with expanding ring for coupling the platen with the line index wheel .einer 'writing or printing business machine, the expansion ring being pivoted a tensioning lever can be spread around an axis lying transversely to the writing waltz axis, characterized in that the tensioning lever (16) in the direction of the axis of the platen (2) is adjustable. 2. Friction clutch according to claim 1, characterized in that the clamping lever (16) is mounted on an eccentric (20) of a rotatable and lockable bolt (21) and is arranged next to the line switching wheel (27) that it is adjustable from the outside . ■ ''; ■ < ■ '">'. ■ ·: ■■.: ■■ 3. Friction clutch after. Claim 1 and 2, characterized / that the clamping lever (16) rests when coupling on the ■ lateral surface of a clamping cone (14) directed with the tip outward: which is at the inner end ^! the piercing axis (11) carrying the coupling button (12) is arranged, while an outer arm (25) of the tensioning lever (16) in the direction of the axis of the platen (2) with wedge surfaces (31) on the ends of the expanding ring (26 ) works.,;. 4. Friction clutch according to claim 1 to 3, characterized in that the clamping lever (16) is designed to be resilient for tensioning the expansion ring (26). . '■ · - .; ■■. 5. Friction clutch according to claim 2, characterized in that the bolt (21) on one with '■■ ·' the end plate (3) of the «platen (2) releasably connected end plate (22) is attached. 6. Friction clutch according to claim 1 to 5, characterized by a the line switching wheel (27) and the expanding ring (26) 'on the end plate (22) holding cover plate (34) . ν Considered publications:
German Patent Nos. 288 466, 307 358,
881, 602 325, 613 630, 851349, 900 940. 1 sheet of drawings 1 909 628/10 9.59