EP1841599B1 - Device for securing the pivot pin of a type unit - Google Patents

Abstract

The invention relates to a device for securing the pivot pin (9) of a type unit (3) to an actuator frame (5) of a self-inking stamp (1) having a reversing mechanism (2). Said device comprises at least one sleeve-type pin securing part (12) that is placed, when mounted, on a terminal area of the pivot pin (9) together with a sleeve base (95) and rests on the exterior with a radial projection (96) on the actuator frame (5). The sleeve base (95) comprises at least one tongue-shaped, resiliently radially deflected detent element (98) having a radially inward-pointing detent projection (99) that engages, when mounted, in a detent recess (101) in the pivot pin (9) in the terminal area thereof, said recess being provided as the mating detent element.

Description

The invention relates to a device for securing a turning axis of a type unit to an operating bracket of a self-inking stamp with turning mechanism, with at least one sleeve-shaped axle securing part, which is pushed in the assembled position with a socket body on an end portion of the turning axis and the outside with a radial projection, preferably a radial Flange-projection, rests on the operating bracket.

From the DE 19 06 426 A is a Selbstfärbestempel with Oberschlagfärbung known in which a set of belt types is penetrated by a turning axis (control axis), which is secured with bush-shaped axle securing parts, there bearing bushes, at both ends to an outer operating bracket. The turning axis is movable along control slots in a punch housing when the actuating bar is pressed down relative to the punch housing, then the type aggregate downwardly adjusted and simultaneously pivoted 180 ° from an upper Einfärbestellung in a lower stamp impression position. The axle securing parts are formed by a simple, smooth tubular body, to the outside of which a radial flange projection adjoins, which bears against the outside of the respective leg of the actuating bracket. These known Achssicherungsteile must sit with close fit frictionally on the turning axis, which can be problematic because usually the turning axis made of steel with a smooth surface, and the axle securing parts made of a plastic material with relatively high strength or stiffness, so that about due of manufacturing tolerances or according to wear in the operation of the punch, the tight fit of the sleeve-shaped axle securing parts on the turning axis is not guaranteed. Furthermore, it is provided in the known stamp to form the turning axis at one end with a widened head on which abuts the adjacent axle securing part, which indeed provides improved security when holding the turning axis in the bracket, but means an unpleasant additional manufacturing effort in the production of the turning axis ,

In the WO 99/16624 a self-inking stamp is disclosed with a turning mechanism, the turning axis of which is secured by means of moldings which are snapped into recesses of the legs of the actuating bracket, in the stirrup legs. The turning axis is stored in the secured state partially in the respective leg and partially on the molded body, wherein the leg has a bearing shell which engages in a circumferential groove of the turning axis, and wherein the turning axis and the bearing shell are held by the inserted molded body in their mutual engagement. Characterized in that the bearing of the turning axis in each case by two separate components, namely the bearing shell and the molded body, realized, these two components and the opening in the stirrup leg must be made relatively accurate to ensure adequate pivotal mounting of the turning axis.

From the WO 00/21759 A Finally, an axle securing an end of a turning axis in an opening in a leg of an actuating yoke of a self-inking, known, wherein the actual axle securing part is an outer ring which is segmented and engages with radial inner flange in a groove of the turning axis, and preferably with a Bearing part is molded in one piece. However, this bearing bush part itself is designed with a smooth inner surface. In this design, however, the ring segments acting as locking elements are relatively difficult to dimension in terms of the required for the snap-in elastic deformation because of the necessarily short lever arms.

It is an object of the invention to remedy this situation and to propose a device for securing a turning axis of a type unit in a self-inking, nonetheless problem-free locking of the axle securing part and a secure hold of the turning axis in the operating bracket with a simple design and inexpensive production of the individual components ensures. It should also be made possible by the same or the sleeve-shaped axle securing parts advantageous pivotal mounting of the turning axis in the operating bracket.

To achieve the above object, the invention provides a backup device as defined in claim 1 before. Advantageous embodiments and further developments of this securing device are specified in the dependent claims.

With the technique according to the invention, a simple, nonetheless reliable snap-locking of the turning axis on the actuating bow of the respective punch can be achieved, wherein the axle securing part at the same time as a bearing body or bearing intermediate body for a rotation and displacement of the turning axis in a receiving or passage opening in the operating bracket or in a slot opening acts in the stamp housing. The axle securing parts can be pushed onto the ends of the turning axis from the outside simply by inserting the turning axis through the operating bracket, the punch housing and the type unit, while they are inserted into the receiving openings in the operating bracket and in the slot openings in the punch housing. In the predetermined operating position then latch the tongue-like locking elements of the socket body in the locking recess of the turning axis, wherein further the axle securing parts with the respective radial flange projection on the outside in the region of the edge of the opening on the operating handle, i. at the respective leg, rest, whereby the turning axis is reliably held in the operating handle.

If the operating bracket of two telescoped parts, in particular an outer, upper metallic bracket member and an inner, the edges of the metallic strap part with edge strips embracing bracket part, in particular made of plastic, can at the same time with the help of Achsicherungsteile a holding together the ends of the stirrup leg Both temple parts can be achieved.

It is low in terms of manufacture, if the or each tongue-like locking element is provided in a window of the socket body and integrally connected at one end to the socket body.

With regard to the postponement of the respective axle securing part, it is also advantageous if the cantilevered end of the tongue-like locking element in the operating position, the outer locking element end, while the tongue-like locking element merges integrally in the remaining socket body at the more inner end.

The latching projection is expediently provided on the freely projecting end of the tongue-like latching element. The detent recess in the turning axis could be formed by individual discrete recesses on the circumference of the turning axis, but this may require a corresponding orientation of the same relative to the turning axis (by relative rotation) during assembly of the axle securing part. In order to enable a postponement of the axle securing parts in any rotational position relative to the turning axis, it is therefore of particular advantage if the locking recess is formed in the turning axis by an annular groove.

For reasons of strength, the turning axle preferably consists of metal, in particular of steel. For example, chrome or nickel plated steel can be used for the turning axis.

For a stable locking of the axle securing parts on the turning axis, it is further favorable if the bushing body has two mutually diametrically opposed tongue-like locking elements.

An embodiment of particularly advantageous embodiment is obtained when the socket body is formed integrally with the radial projection and the or each locking element made of plastic, preferably of POM (polyoxymethylene). It is further favorable if the socket body with the radial projection and the or each locking element is an injection molded part.

The respective axle securing part could have on its outer side a continuous end wall, which merges into the radial projection or flange projection, and which encloses and covers the respective front side of the turning axle. However, in order to facilitate possibly a possible release of the axle securing parts of the turning axis with the aid of a corresponding tool, and also to make the production easier to do It has proved to be advantageous if the axle securing part has a through opening for pushing onto the turning axis. In this case, with a thin-walled tube part, which is inserted from the front side, from the outside, through the opening of the axle securing part and in direct circumferential abutment on the turning axis, a release of the tongue-like locking elements of the turning axis be accomplished, so that then the axle securing part of the turning axis can be deducted.

• Die Fig. 1 und 2 schaubildliche Ansichten eines Selbstfärbestempels mit einem mehrere Typenbänder aufweisenden Stempelaggregat von zwei verschiedenen Seiten;
• Fig. 3 eine Seitenansicht dieses Selbstfärbestempels;
• Fig. 4 in einer auseinander gezogenen Darstellung die wesentlichen Komponenten eines solchen Selbstfärbestempels;
• Fig. 5 eine schaubildliche, auseinandergezogene Darstellung der Teile des mehrteilig ausgebildeten Betätigungsbügels samt Griff;
• Fig. 6 eine Schnittdarstellung des Selbstfärbestempels gemäß Fig. 1 bis 5;
• Fig. 7 eine schaubildliche Unteransicht des Selbstfärbestempels gemäß Fig. 1 bis 6;
• Fig. 8 eine Ansicht eines bei dem Selbstfärbestempel gemäß Fig. 1 bis 7 verwendeten Achssicherungsteils;
• Fig. 9 eine axiale Schnittansicht dieses Achssicherungsteils gemäß Fig. 8;
• die Fig. 10 und 11 Stirnansichten des Achssicherungsteils gemäß den Richtungen X und XI in Fig. 8; und
• Fig. 12 eine Detail-Schnittdarstellung ähnlich Fig. 6, im Bereich eines Achssicherungsteils, gemäß den Pfeil XII in Fig. 6.

The invention will be explained below with reference to particularly preferred embodiments, to which it should not be limited, and with reference to the drawings. In detail in the drawing:

• The Fig. 1 and 2 perspective views of a self-inking stamp with a multi-type bands stamping unit from two different sides;
• Fig. 3 a side view of this self-inking stamp;
• Fig. 4 in an exploded view of the essential components of such self-inking stamp;
• Fig. 5 a perspective, exploded view of the parts of the multi-part actuating handle including handle;
• Fig. 6 a sectional view of the self-inking stamp according to Fig. 1 to 5 ;
• Fig. 7 a perspective bottom view of the self-inking stamp according to Fig. 1 to 6 ;
• Fig. 8 a view of one of the self-inking stamp according to Fig. 1 to 7 used axle securing parts;
• Fig. 9 an axial sectional view of this axle securing part according to Fig. 8 ;
• the 10 and 11 End views of the axle securing part according to the directions X and XI in Fig. 8 ; and
• Fig. 12 a detail sectional view similar Fig. 6 , in the area of a shaft securing part, according to the arrow XII in Fig. 6 ,

In the Fig. 1 to 4 is a self-inking stamp 1 of the basic construction and function per se, with top-coat dyeing, with a turning mechanism 2 for a stamp-type aggregate 3. The type unit 3 is in a formed from two parts 4A, 4B stamp housing 4 by means of an actuating bracket 5 up and down and thereby 180 ° from one in the Fig. 1 . 2 and 4 starting upper rest position starting in the stamp types (in Fig. 1 to 4 not apparent, cf. but Fig. 6 ) abut an ink pad impregnated with stamping ink in a load-shaped container 6 which can be pushed in and out in the stamp housing 4, and can be moved to a lower, turned-over impression position. The turning mechanism 2 is of a known type, see. for example the US Pat. No. 1,401,436 A or US 4 432 281 A , And has swing-shaped, pivotally mounted at the upper end turning parts 7 with a curved control slot 8 for a turn axis 9. This turning axis 9 extends in the assembled state through a base part 10 of the type unit 3, see. except Fig. 4 also Fig. 6 ; Furthermore, the turning axis 9 extends through longitudinal slots 11 and 11A, 11B (s. Fig. 4 ) of the stamp housing 4, and it is fixed by means of bush-shaped axle securing parts 12 in legs 13 of the actuating bracket 5.

The turning parts 7 are pivotally mounted with pins 14 in bores 15 (or 15A, 15B) of the punch housing 4, and they carry inner pins 16, which for turning the type unit 3 in its downward movement by means of the bracket 5 and the turning axis 9 in lateral Guide grooves 17 of the type unit 3 engage, see. also Fig. 5 ,

The actuating bracket 5 is in a conventional manner by means of a spring 18, in particular a helical compression spring, which is supported on the upper side of the punch housing 4, in his in the Fig. 1 to 3 shown upper rest position, and he is against the force of this spring 18 relative to the punch housing 4 downwardly movable. The spring 18 is received in a tubular part 19, which extends into a at the top of the actuating bracket 5, at the transverse part or web 20, mounted handle 21, wherein the handle 21 and the tube member 19 are telescoped in the operation of the punch 1.

On the punch housing 4 is further an angled formed text viewing window 22 with a relatively large front surface 22A and an upper deck surface 22B attached, wherein in the upper deck surface 22B, a slot-shaped recess 22C is provided to the viewing window 22 when mounting the punch housing 4, in particular by Snapping with the help of a lower, inwardly projecting locking bar 23 (s. Fig. 4 ), in spite of the pipe part 19 to postpone, the pipe part 19, as best of Fig. 2 can be seen, is received in the mounted position in this recess 22C. Out Fig. 4 Furthermore, a comparably angled formed, provided with an upper, rear slot text card 24 can be seen, this text card 24 a comparatively large footprint - on the front and at the top - for attaching appropriate information on the stamp imprint etc. offers. The Textkärtchen 24 can be placed when mounted in the viewing window 22 with support on the locking bar 23 and fixed together with this on the punch housing upper part 4B under support at the top and under latching the locking bar 23 with a cross bar 25 of the punch housing upper part 4B.

Out Fig. 1 Finally, a push-button ratchet 26 on the bracket 5 can be seen, which cooperates with notches 27 on the tube part 19 in order to fix the actuating bracket 5 in a predetermined position relative to the punch housing 4, as is known per se.

Similar to the stamp housing 4, the operating bracket 5 consists of two superimposed parts, namely an upper or outer, metallic U-shaped bracket part 5A and a lower or inner, made of plastic bracket part 5B, at its upper web part 20B has not just formed a receptacle 26 'for the pushbutton ratchet 26, but also carries on its upper side a tubular extension 70 which is closed at its upper end, ie at the end facing away from the actuating part 5B end, by a wall 71 having a central opening 72. This extension 70 is provided with two diametrically opposed locking elements 73, which are in the form of locking tongues 74, each with a provided on the freely projecting lower end, outwardly projecting locking projection 75, are formed, see. Fig. 5 and 6 ,

The tubular extension 70 protrudes in the assembled state of the operating bracket 5, that is, when the metallic upper bracket part 5A of the actuating bracket 5 is pushed onto the lower bracket part 5B, through an opening 76 in the upper web portion 20A of the metallic bracket part 5A and into the interior of the hollow body 21st 'executed handle 21, s. except Fig. 5 especially Fig. 6 , The lower bracket part 5B made of plastic is provided on its front side and on its rear side with the metallic upper bracket part 5A encompassing guide rails 77 which ensure a receptacle 78 for a tight fit of the upper bracket part 5A at the lower bracket part 5B and also the sharp edges of the metallic cover upper bracket part 5A in the manner of a fairing.

In the in Fig. 6 shown mounted position, the locking elements 73 on the extension 70 cooperate with corresponding locking elements 79 in the form of upwardly facing edges 80 of the handle 21, said edges 80, the edges of diametrically opposed latching niche or -ausnehmungen 81 (s. Fig. 5 and 6 ) in an inner tube part 82 of the handle 21. This pipe part 82 has further on its as shown in FIG Fig. 5 to 6 Upper side, which faces away from the actuating part or operating bracket 5, completed by an end wall 83. This end wall 83 is in the mounted position, as in Fig. 6 shown on the upper wall 71 of the extension 70 and thus additionally stabilizes this handle attachment.

As then in particular from Fig. 5 can be seen, the handle 21 except the actual handle-hollow body 21 'with a latchable cover 84, said locking strips 85 at the upper end face of the hollow body 21' with an outer bead-shaped, in the drawing unspecified locking projection in a conventional manner in a corresponding groove 86 in the wall of the cover 84 snap. The cover 84 has a flat front side 87, see FIG. Fig. 5 , with which it is guided along the tubular part 82. For this purpose, a direct system may be provided, but it may also be provided a conventional per se tongue and groove guide, wherein from Fig. 5 a corresponding guide groove 88 on the tube part 82 can be seen. Such a tongue and groove guide, with the guide groove 88, facilitates the placement and snapping the cover 84 on the hollow body 21 '. Nevertheless, the cover 84 can be easily removed from the hollow body 21 'by pushing up again, whereby access to the interior of the handle-hollow body 21' and thus provided to the locking elements 73, so that these locking elements 73 can be pressed radially inwardly to the To release detent engagement on the edge 80 of the tubular member 82 and so the handle 21 and its hollow body 21 'to remove from the operating bracket 5 can. In this way, although an extremely stable latching connection between the handle 21 and bracket 5 is achieved by means of the latching elements described, the handle 21 is easily and conveniently removed and replaced, for example, with another handle, such as with a different shape and / or surface ,

How far out Fig. 5 it can be seen, the tube member 82 may be connected in the interior of the handle-hollow body 21 'with the latter via at least substantially radial stiffening webs 89, which extend approximately star-shaped in plan view. The two are preferred in Fig. 5 visible front webs 89, however, off-center and parallel to the front 87 of the cover 84 is provided.

The lower bracket member 5B including extension 70 is preferably as the handle-hollow body 21 'together with inner tube part 82 made in one piece as an injection molded part, wherein as a plastic material, for example, acrylonitrile-butadiene-styrene copolymer (ABS), but optionally also polyoxymethylene (POM) or a comparable plastic material, can be used.

To support the spring 18 at the top, inside the Handle 21, would of course also conceivable, instead of the upper wall 71 and the additionally supporting end wall 83, a web cross or the like. Provide. The end wall 83 can be omitted in principle at all. The tube part 82 could then be formed as a pipe socket, whose upper end face defines an all-round upper edge 80 as a latching element 79. It is also conceivable in functional terms to interchange the latching elements 73 and 79, ie to provide elastically deformable latching elements on the tube part 82 and rigid, cooperating with this locking surfaces or locking recesses on the extension 70. Furthermore, it is of course also possible to provide a one-piece bracket 5, in particular made of plastic, possibly also of metal. The shape of the handle 21 may also be, for example, cylindrical, spherical, etc. in addition to the flattened truncated cone shape shown.

In Fig. 7 is the stamp according to Fig. 1 to 4 for the sake of completeness, also in a diagrammatic view from below. It can be seen that the punch housing 4 is similar to the operating bracket 5 so constructed of the two parts 4A, 4B that the intrinsic, made of plastic part 4B (see FIG. Fig. 4 ) in the four corner regions 90 of the stamp housing 4 with overlapping edge strips 77 'forms a slide-in guide for the metallic housing part 4A. At the same time form the edge strips 77 'in the corner regions 90 of the punch housing part 4B and a sliding guide for the operating bracket 5 in its downward movement relative to the punch housing 4 to move the type unit 3 from the shown upper rest position or Einfärbestellung in the lower stamp impression position and to pivot , In the corner regions 90 of the plastic stamp housing part 4B further round bottom anti-slip elements 91 made of plastic or rubber are integrally molded or glued. Due to their high friction, these slip-protection elements 91 prevent unwanted slipping of the stamp housing 4 when placed on a substrate (paper, cardboard, etc.) when making a stamp impression. Moreover, the corner portions 90 of the plastic case 4B also allow a more comfortable grip of the punch case, covering the sometimes sharp edges of the metallic punch case portion 4A.

Out Fig. 7 is finally still - similar to out Fig. 4 - It can be seen that the punch housing 4, namely more precisely its metallic part 4A, with its underside forms a Aufsetzrahmen 92 with a rectangular passage opening 93 for the punch unit 3. The Aufsetzrahmen 92 is not directly but, as mentioned, placed on the slip-protection elements 91 to the respective substrate to be printed.

In the 8 to 11 In detail, a bush-shaped axle securing element 12 is shown, wherein two such axle securing elements 12 for securing the turning axle 9, which passes through the punch unit 3 and the punch housing 4, in openings 94 (FIG. Fig. 4 ) or 94A, 94B ( Fig. 5 ) of the operating bracket 5 are used. The axial securing element 12 shown consists of a one-piece injection-molded part with a substantially sleeve-shaped bushing body 95 and a thereto - in the operating position on the outside - subsequent radial flange projection 96. The radial projection 96 encloses the mouth of a passing through the entire axis securing element 12 opening 97, which is substantially circular in cross-section, you can see from two diametrically opposite, integrally formed on tongue-shaped locking elements 98 locking projections 99 from. The locking elements 98 are each exposed in a window 100, apart from the one, in the operating position inside end, which connects directly to the rest of the socket body 95. The locking projection 99, however, is formed on the opposite, freely projecting end of the tongue-shaped locking element 98 and is in the in Fig. 9 shown rest position in the interior of the cylinder space defined by the opening 97, see. also the 10 and 11 , Apart from the region of the tongue-shaped latching elements 98, the socket body 95 with its otherwise cylindrical outer surface forms a bearing surface for the rotary mounting in the respective opening 94 or 94A, 94B. In this operating position, the radial flange projection 96 rests against the outside of the actuating part or actuating yoke 5, in particular from FIGS Fig. 1 . 2 and 7 but most of all Fig. 12 can be seen in detail. In this sectional view of detail shown in greater detail Fig. 12 is also to be seen that in the Operating position, the tongue-shaped locking elements 98 are engaged with their locking projections 99 in a detent recess 101, which is in the form of an over the entire circumference of the turning axis 9 extending annular groove.

The axle securing part 12 can be injection-molded, for example, from polyoxymethylene (POM) or a comparable, comparatively hard, resilient plastic material. In the in Fig. 12 shown operating position of the axle securing member 12 rotates the turning axis 9 rotatably in the operating part or operating bracket 5, wherein it secures the turn axis 9 against accidental pushing out of the punch 1 and also characterized in that the radial flange projection 96 on the outside of the plastic strap part 5A is present, this temple part 5A holds against the metallic bracket part 5B in abutment, so that the ends of the temple parts 5A, 5B are not unintentionally spread apart. At the top of the actuating bracket 5 whose bracket parts 5A, 5B, with the web portions 20A, 20B, held together by the fact that the handle 21, more precisely, the hollow body 21 ', rests with its underside on the metal web 20A, if he his tube part 82 is snapped on extension 70 of the plastic strap part 5B.

In principle, it is often sufficient if the axle securing element 12 has only one tongue-shaped latching element 98, and on the other hand more than two such latching elements 98, for example three or four, can be provided. In itself, instead of the annular groove as a detent recess 101, a corresponding number of discrete circumferential, arcuate detent recesses 101 are provided, but then during assembly, when pushing the respective Achssicherungselements 12 on the turning axis 9 within the openings 94A, 94B, to a corresponding Turn-alignment of the two parts 9, 12 to pay attention.

When the locking projections 99 on its axial outside (as shown in FIG Fig. 12 on their left side) are provided with inwardly directed chamfers or bevels, and the locking elements 98 can be released from their latching engagement in the detent recess 101 in that in the opening 97 between the radial flange projection 96 and the turning axis 9, a thin-walled tubular element is inserted, which slides on impact with the locking tongues in the region of the locking projections on these bevels and thus raises the locking projections 99 from the detent recess 101.

For the sake of completeness it is too Fig. 6 still stated that there as shown left axle securing element 12 in a position similar to in Fig. 12 is shown, in which the tongue-shaped locking elements (in Fig. 6 unspecified) are recognizable, whereas on the right side of Fig. 6 the axle securing element 12 is shown in a twisted position on the other hand, wherein from this, the pivot bearing of the turning axis 9 in the passage openings 94 of the actuating bracket is better recognizable.

Claims (11)

1. A device for securing a turning axle (9) of a type unit (3) to an actuating bow (5) of a self-inking stamp (1) having a turning mechanism (2), with at least one bushing-shaped axle-securing member (12) which, in the mounted position, is slid onto an end region of the turning axle (9) with a bushing body (95) and externally contacts the actuating bow (5) with a radial projection (96), characterized in that the bushing body (95) includes at least one tongue-like, resiliently radially deflectable snap-in element (98) having a radially inwardly oriented snap-in projection (99) which, in the mounted position, engages in a snap-in depression (101) provided as corresponding snap-in element in the turning axle (9) in the end region of the latter.
2. The device according to claim 1, characterized in that the tongue-like snap-in element (98) is provided in a window (100) of the bushing body (95) and, at one end thereof, integrally follows upon the bushing body (95).
3. The device according to claim 2, characterized in that the snap-in projection (99) is provided on the freely cantilevering end of the tongue-like snap-in element (98).
4. The device according to any one of claims 1 to 3, characterized in that the snap-in depression (101) in the turning axle (9) is formed by an annular groove.
5. The device according to any one of claims 1 to 4, characterized in that the turning axle (9) is made of metal, in particular steel.
6. The device according to any one of claims 1 to 5, characterized in that the bushing body (95) has two diametrically oppositely arranged tongue-like snap-in elements (98).
7. The device according to any one of claims 1 to 6, characterized in that the bushing body (95) is integrally formed together with the radial projection (96) and the, or each, snap-in element (98) of a synthetic material, preferably of POM.
8. The device according to claim 7, characterized in that the bushing body (95) with the radial projection (96) and the, or each, snap-in element (98) is an injection-molded member.
9. The device according to any one of claims 1 to 8, characterized in that the axle securing member (12) has an opening (97) extending therethrough for its slipping onto the turning axle (9).
10. The device according to any one of claims 1 to 9, characterized in that the actuating bow (5) has two bow parts (5A, 5B) slid one into the other, the leg ends of which each having passage openings (94A, 94B) for the turning axle (9), wherein the axle securing member(s) slid onto the turning axle (9) simultaneously hold the legs (13) of the bow parts (5A, 5B) against each other.
11. The device according to any one of claims 1 to 10, characterized in that the freely cantilevering end of the tongue-like snap-in element (98) in the operating position is the outer end of the snap-in element, whereas the tongue-like snap-in element at the further inwardly located end merges integrally with the remaining bushing body (95).

Images