EP1841601B1 - Hand stamp type unit and drive wheel therefor - Google Patents

Description

The invention relates to a type aggregate for a hand stamp, in particular self-inking stamp, with at least one type band, which is placed over a drive wheel which is rotatably mounted in a bearing part and provided with a dial, preferably with this one-piece according to the introductory part of claim 1.

Furthermore, the invention relates to such a type aggregate with a drive wheel with at least one type band, which is placed in the mounted position on the drive wheel, which drive wheel has a profiled wheel body and thus, preferably integrally connected dial.

It is known to equip Selbstfärbestempel with type aggregates, which have one or more type bands for adjustable punch types, these type bands are arranged in a loop in the type unit and thereby wrap around drive wheels, which are connected with adjusting wheels, so as the type bands in, type unit gradually to the transfer of to adjust the respective adjustable punch type to the printing position. For example, such a self-inking stamp is made with such a type aggregate EP 723 874 A known. Usually, the loop-shaped type bands are combined in the type unit with fixed types, and access to the drive wheels or their adjusting wheels, for setting the respective type band, is possible only in a spatially limited area. It may happen that when adjusting the drive wheels, the fingers come into contact with the wetted with stamping ink from earlier stamp operations ago type bands, so that the fingers are contaminated. To prevent this, if possible, the diameters of the dials can be made correspondingly large, but this also increases the space required within the stamp housing undesirable. Moreover, the dials of the drive wheels are usually thin to thereby lose little space in the direction of the turning axis of such a punch assembly, except that by thicker dials, the distance between the adjustable punch types, as to the adjacent Type bands are present, can be undesirably large for the respective impression. This results, also since the setting of the drive wheels or type bands must not be so smooth that the dials cut relatively sharp when adjusting in the fingertips, and this is all the more true when the dials are serrated or fluted as usual at its periphery ,

From AT 379 U1 it is already known to put a cover over the type bands to protect against contamination of the fingers when adjusting the dials; this cover, which has slots for the passage of the dials, is inserted for fixing in slots of a base cross member, but the hold of the cover is insufficient.

In the DE 203 09 613 U1 Furthermore, a type of aggregate of the initially mentioned type is shown, wherein a cover is provided which has triangular notches on the end faces, in which when plugging the cover on a bearing part of the type unit on the legs of this bearing part adjacent to the base thereof provided, axially inwardly directed locking projections snap. The disadvantage here is, inter alia, that the snapping of the cover and any subsequent re-removal of the cover is quite cumbersome, since an elastic deformation of the cooperating locking elements is limited possible, and it is also easy to break out of front side wall parts of the hood-shaped cover can come.

It is an object of the invention to remedy this situation and propose a type aggregate for this, with a simple, comfortable, comfortable fastening and loosening the cover without the risk of damage and also a smooth, comfortable adjustment of the type bands without the risk of contamination Finger and further, in particular without unpleasant cutting of the edges of the dials in the fingertips is possible.

To solve this problem, the invention provides a type aggregate as defined in claim 1. Advantageous embodiments and further developments are the subject of the dependent claims.

With the technique according to the invention, a contact of the fingers with the stamping color-bearing type bands can be avoided simply by a readily snap-on, securely fixable hood-shaped cover that shields the type bands in question range, but the drive wheels or, more precisely, their dials, on the slot openings accessible. The cover can be extremely easy due to the inventively provided locking connection or, if desired, removed again, unlike in the case of screwing the cover, so that, for example, cleaning of type bands or replacement of type bands, is easily possible.

This is achieved in particular by the location and shape of the locking elements, as provided by the invention, since then the locking elements are easily accessible and allow a defined elastic deformation.

To produce the latch or snap connection, it has proved to be advantageous if the projections projecting from the front side of the cover carry a generally peg-shaped latch projection.

On the other hand, it is also advantageous in this context if the locking lugs on the legs of the bearing part each have an undercut locking groove.

For a comfortable production of the locking connection, it is also advantageous if the cover together with extensions made of an elastically deformable plastic, such. ABS or PS. Furthermore, it is favorable here if the cover together with projections is designed as a one-piece injection-molded part.

On the other hand, it is advantageous in terms of the storage of the drive wheels for the type bands when the bearing part together with locking lugs made of a relatively rigid plastic material, such as POM exists. Again, the bearing part together with locking lugs may preferably be formed as a one-piece injection molded part.

A particularly favorable embodiment of the type of unit according to the invention is characterized in that the bearing part with a, a passage opening for the respective located in the imprint position type of the type band base part is connected via adjusting screws, whereby the latched with the bearing part cover when adjusting the bearing part relative to the base part is adjustable, and that the bearing part on each leg end face outside a provided between the locking lugs laterally open receptacle for the head of the adjusting screw, and the receptacle has a bottom formed by the locking lugs with a passage opening for the screw shaft, which is open to the side over a lateral slot. In this configuration, the latched with the bearing part cover when adjusting the bearing part relative to the base part can be easily mitverstellt. As is known, a frame-shaped plate, in particular of rubber, with fixed stamp types can be attached to the base part of such a type aggregate. The base part may, in turn, be made of a rigid plastic material, e.g. ABS or POM, be made.

The (or each) drive wheel of the type aggregate preferably has a soft peripheral region which is detected with the fingertips compared to the harder in relation to plastic material of the remaining drive wheel, in particular the wheel body and or or the inner portion of the dial. This avoids an uncomfortable incision feeling on the fingers when detecting the respective adjusting wheel, nevertheless allowing a secure adjustment of the driving wheels without slipping on the fingertip due to the high friction of the soft plastic material. For an intimate connection of the two different hard plastic materials, it has also proven to be advantageous if the radially inner, harder area of the dial is formed with spoke-like extensions, between which extends the softer plastic material.

A particularly comfortable softer plastic material used for the outer peripheral part of the dials can, is a thermoplastic elastomer. As a harder plastic material, for example, PS, ABS, PC or a combination of such plastics can be used. Preferably, the drive wheel is provided as a two-component injection molded part.

• 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 Ansicht eines Beispiels eines Typenaggregats, wie es bei einem solchen Selbstfärbestempel gemäß Fig. 1 bis 4 eingesetzt werden kann;
• Fig. 6 eine Ansicht dieses Typenaggregats;
• Fig. 7 eine Draufsicht auf dieses Typenaggregat; Fig. 8 eine Seitenansicht des Typenaggregats;
• Fig. 8A ein Detail dieses Typenaggregats gemäß Pfeil A in Fig. 8, zur Veranschaulichung der Rastverbindung zwischen einer Abdeckung und einem Lagerteil des Typenaggregats;
• Fig. 9 in einer auseinander gezogenen Darstellung die wesentlichen Komponenten des Typenaggregats gemäß den Fig. 5 bis 8;
• Fig. 10 eine schematische Schnittdarstellung gemäß der LängsMittenebene dieses Typenaggregats, entsprechend der Linie X-X in Fig. 7;
• Fig. 11 eine Ansicht eines Antriebsrads eines solchen Typen-aggregats von der Radkörper-Seite her; und
• Fig. 12 eine Axialschnittansicht dieses Antriebsrads, zur Veranschaulichung der Ausbildung dieses Antriebsrads als Zweikomponenten-Spritzgussteil.

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 view of an example of a type aggregate, as in such a self-inking stamp according to Fig. 1 to 4 can be used;
• Fig. 6 a view of this type aggregate;
• Fig. 7 a plan view of this type aggregate; Fig. 8 a side view of the type aggregate;
• Fig. 8A a detail of this type aggregate according to arrow A in Fig. 8 to illustrate the locking connection between a cover and a bearing part of the type unit;
• Fig. 9 in an exploded view of the essential components of the type unit according to the Fig. 5 to 8 ;
• Fig. 10 a schematic sectional view along the longitudinal center plane of this type aggregate, corresponding to the line XX in Fig. 7 ;
• Fig. 11 a view of a drive wheel of such a type unit from the wheel center side; and
• Fig. 12 an axial sectional view of this drive wheel, to illustrate the formation of this drive wheel as a two-component injection molded part.

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 of two parts 4A, 4B punch housing 4 by means of an actuating bracket 5 up and down and moved 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. 5 ) 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. 8 ; 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 under rest on the Rastleitse 23 and fixed together with this on the punch housing upper part 4B under support at the top and 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.

Like from the Fig. 5 to 10 it can be seen, the type of unit 3 in addition to the base part 10, which is also referred to as text plate body, a bearing member 28, also called housing bracket, which is fixed relative to the base member 10 by means of adjusting screws 29 in its vertical position. The bearing part 28 is preferably as a one-piece injection-molded part formed with two legs 30 and one of these legs 30 connecting support bar 31, wherein the support bar 31 for supporting type bands 32 (for example, four type bands 32, for setting a date to be printed off) is used. The type bands 32 each extend over an associated drive wheel 33, 34, 35, 36, wherein each of these drive wheels 33 to 36 has a gearwheel-like profiled on its circumference wheel body 37 and thus preferably integrally connected Einstellrad 38. The drive wheels 33 to 36 are by means of an axis 39, s. Fig. 9 and 10 , rotatably mounted in the bearing part 28, so as to be able to set the type bands 32 by means of the dials 38 of the drive wheels 33 to 36 manually to the desired date or generally to the desired impression.

The adjusting or adjusting screws 29 are screwed into provided with an internal thread receptacles 40 of the base body 10, s. Fig. 10 , and the heads 41 of the adjusting screws 29 are received in laterally open receptacles 42 on the two end sides of the bearing part 28, wherein they are inserted in each case from the side by a slot 42 '' in a bottom 42 'in these receptacles 42 until the shaft 29 'of the adjusting screws 29 is far enough inward to fit in the respective receptacle 40 of the base part 10, where it extends through an unspecified Dürchtrittsöffnung in alignment with the receptacle 40 in the base part 10 therethrough. The top of the screw head 41 of the respective adjustment screws 29 is then accessible through an upper opening 43 of the receptacle 42 for a tool, in particular a screwdriver (not shown), to make the required fixation and fine adjustment.

The receptacles 42 are formed on the two end faces of the bearing part 28, on the outer sides, in each case between two lugs 44 of the bearing part 28, wherein in each case a pair of such lugs 44 arranged in mirror image and, moreover, a virtually identical design is provided for all approaches. These approaches 44 form with in particular Fig. 8, 8A and 9 apparent locking grooves 45 locking elements 46 (and are accordingly hereinafter also referred to as locking lugs 44), and these locking lugs 44 work with correspondingly designed and cooperating with them Locking elements 47 on a hood-shaped type band cover 48 together. In detail, the latching elements 47 of the cover 48 are formed by pin-shaped projections 49 on support part extensions 50, which protrude at the two end faces of the cover 48.

The cover 48 is as mentioned hood-shaped, with a cross-sectionally U-shaped configuration, and it has slots 51 for the dials or wheels 38 of the drive wheels 33 to 36. These slots 51 extend from an upper arcuate portion 52 of the cover 48 into the region of legs 53 of the cover 48. With the portions 54 between the slots 51, the type bands 32 are covered in the mounted position, s. especially Fig. 5 , whereby it is avoided that when adjusting the type bands 32 on the drive wheels or their shims 38, the fingers of the user are contaminated by unintentional rubbing against the type bands 32 with stamping ink. The cover 48 can in a simple manner on the bearing member 28 by means of the extensions 50, which snap into the locking elements 45 of the locking lugs 44, detent attached, ie, "snapped", and they can also easily from the bearing part 28 of Type aggregate 3 can be solved. Furthermore, when adjusting the bearing part 28 relative to the base part 10, the cover 48 is automatically adjusted, since it is mounted on the bearing part 28 - and not on the base part 10.

The drive wheels 33 to 36 are each designed as a two-component injection molded part, cf. Fig. 9 . 11 and 12 (For the drive wheel 36 as an example), wherein the wheel body 37 and preferably also an inner portion 55 of the respective dial 38 of a comparatively harder material, the radially outer portion or peripheral portion 56 of the dial 38, however, is formed of a relatively soft plastic material. As a soft plastic material in particular a thermoplastic elastomer is used, whereas for the harder inner part of the drive wheels (wheel body 37 and / or interior 55) for example polystyrene (PS), acrylonitrile-butadiene-styrene copolymer (ABS), polycarbonate (PC) or a Combination of these materials, in particular PC-ABS, is used. The outer softer plastic material results in gripping the dials 38 with the fingers a pleasant feeling and allows a particularly comfortable, easy rotation of the dials 38 with the drive wheels 33-36. In addition, the scope of the dials, as in particular Fig. 11 it can be seen to be corrugated or serrated to thereby also improve the "grip", in addition to the high friction of the soft plastic material.

Plastic is also preferably used for the drive wheel axle 39, in particular polyoxymethylene (POM); Similarly, the bearing member 28 of POM or the like. Relatively rigid plastic material can be injected, as well as the base member 10 can be made for example of POM or ABS by injection molding.

For the cover 48, a plastic material which is somewhat softer compared to the bearing part 28 is preferably used, in particular PS or ABS being considered. The cover 48 is preferably produced as a one-piece injection-molded part.

As then out Fig. 9 and 12 can be seen, the harder inner material portion 55 of the drive wheels 33 to 36 in the region of the shims 38 skeletal, with spoke-like projections 57 may be formed, wherein the softer plastic material of the outer region 56 extends into the interstices between these extensions 57; In this way, a solid composite of the two plastic components can be obtained in the manufacture of the drive wheels 33 to 36.

Further, in particular from the Fig. 5 . 9 and 10 it can be seen, the base part 10 has a lower frame part 60 according to the illustration with a passage opening 61 for the supported by the support bar 31 respectively when making a stamp impression types of type bands 32, and on this frame part 60 is a rectangular plate 62 with corresponding Durchtrittsoffnung 61 'for the types of type band 32, for example, attached by gluing. This plate 62 is made of synthetic or natural rubber, approximately with a hardness (Shore A) of 50 to 55, and it is with out Fig. 5 apparent fixed stamp types 63 provided.

How finally out Fig. 9 can still be seen, the legs 30 of the bearing member 28 have outside guide channels 64 which cooperate with corresponding elongated, upright guide projections 65 of the base member 10, so as to guide the bearing member 28 on the base member 10 during mounting and adjustment and secure against lateral displacement.

Claims (15)

1. A type unit (3) for an handstamp, in particular, self-inking stamp (1), with at least one type band (32) placed over a drive wheel (33-36), said drive wheel being rotatably mounted in two legs (30) of a bearing member (28) and provided with an adjustment wheel (38), being integrally formed therewith, and with a hood-shaped cover (48) which includes at least one slot (51) for the passage of a circumferential part of the adjustment wheel (38) of the drive wheel (33-36) as well as snap-in elements (47) in the region of its free ends and which covers the at least one type band (32) in the region of the drive wheel (33-36) in a position releasably fastened by snapping in on the bearing member (28), characterized in that the two legs (30) of the bearing member (28) each comprise two projecting snap-in noses (44) on their respective outer side that faces away from the type band (32), and in that the cover (48) comprises two cantilevering extensions (50) on each one of its two front sides, as snap-in elements (47) for snapping engagement with the snap-in noses (44) of the bearing member (28).
2. The type unit according to claim 1, characterized in that the extensions (50) cantilevering from the cover (48) at the front side thereof carry a generally pin-shaped snap-in projection (49).
3. The type unit according to claim 1 or 2, characterized in that the snap-in noses (44) on the legs (30) of the bearing member (28) each have an undercut snap-in groove (45).
4. The type unit according to any one of claims 1 to 3, characterized in that the cover (48) including the extensions (50) consists of an elastically deformable synthetic material, such as ABS or PS.
5. The type unit according to any one of claims 1 to 4, characterized in that the cover (48) including the extensions (50) is formed as an integral injection-molded part.
6. The type unit according to any one of claims 1 to 5, characterized in that the bearing member (28) including the snap-in noses (44) is made of a comparatively stiff synthetic material, such as POM.
7. The type unit according to any one of claims 1 to 6, characterized in that the bearing member (28) including the snap-in noses (44) is formed as an integral injection-molded part.
8. The type unit according to any one of claims 1 to 7, characterized in that the bearing member (28) is connected, via adjustment screws (29), to a base member (10) including a passage opening (61) for the respective type of the type band (32) that is in its position of imprint, whereby the cover (48) which is in snap-in engagement with the bearing member (28) is co-adjustable when adjusting the bearing member (28) relative to the base member (10), and that the bearing member (28) on each leg front side externally has a laterally open seat (42) located between the snap-in noses (44) and provided for the head (41) of the adjustment screw (29), and the seat (42) has a bottom (42') formed by the snap-in noses (44) and including a passage opening for the screw shaft (29'), which passage opening is laterally open via a lateral slot (42'').
9. The type unit according to claim 8, characterized in that a frame-shaped plate (62) with stationary stamp types (63) is attached to the base member (10).
10. The type unit according to claim 8 or 9, characterized in that the base member (10) consists of a rigid synthetic material, such as ABS or POM.
11. The type unit according to any one of claims 1 to 10, characterized in that the drive wheel comprises a profiled wheel body and an adjustment wheel connected, preferably integrally, thereto, which adjustment wheel (38) in its external circumferential region (56) comprises a softer synthetic material than the synthetic material of the radially inner region (55) of the adjustment wheel (38) or the wheel body (37), respectively.
12. The type unit according to claim 11, characterized in that the radially inner, harder region (55) of the adjustment wheel (38) is formed with spoke-type extensions (57) between which the softer synthetic material extends.
13. The type unit according to claim 11 or 12, characterized in that the softer synthetic material is a thermoplastic elastomer.
14. The type unit according to any one of claims 11 to 13, characterized in that the harder synthetic material is a synthetic material selected from the group consisting of PS, ABS, PC or a combination of such synthetic materials.
15. The type unit according to any one of claims 11 to 14, characterized in that the drive wheel is designed as a two-component injection-molded part.

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