DE3301252C1

DE3301252C1 - Bearing arrangement for the writing arm of an automatic lettering and/or drawing instrument

Info

Publication number: DE3301252C1
Application number: DE19833301252
Authority: DE
Inventors: Gerold 2081 Ellerbek Anderka; Rolf 2000 Hamburg Martens; Rolf 2200 Elsmhorn Paschen
Original assignee: Rotring Werke Riepe KG
Current assignee: Rotring Werke Riepe KG
Priority date: 1983-01-15
Filing date: 1983-01-15
Publication date: 1984-08-23

Abstract

In a bearing arrangement for the writing arm (1), movable in the X- and Y-directions, of an automatic lettering and/or drawing instrument in which the writing arm (1) is fastened to a bearing block (2, 20), the bearing block consists of two parts (2; 20), of which one part (2) carries the bearing bush (5) for the X-guide rod and the other part (20) carries the bearing sleeve for the Y-guide rod (10). The two parts (2; 20) are coupled to one another in such a way as to be rotatable about an axis (30) running perpendicularly to the longitudinal axes of bearing bush (5) and bearing sleeve. <IMAGE>

Description

In einer bevorzugten Ausgestaltung der Erfindung kann das eine Teil in seiner dem anderen Teil zugewandten Fläche einen mit seiner Mittelachse koaxial zur Achse verlaufenden Vorsprung in Form eines Kreiszylinders oder eines Kegels oder Kegelstumpfes aufweisen, und im anderen Teil kann in seiner dem einen Teil zugewandten Fläche eine der Form des Vorsprungs angepaßte Aufnahmeöffnung vorgesehen sein. In a preferred embodiment of the invention, this can be a part in its surface facing the other part one coaxial with its central axis to the axis extending projection in the form of a circular cylinder or a cone or truncated cone, and in the other part can in its one part facing Surface a receiving opening adapted to the shape of the projection be provided.

Durch den Eingriff von Vorsprung und Aufnahmeöffnung wird eine Verlagerung der Teile des Lagerbockes in Richtungen der Längsachsen von Lagerbuchse und Lagerhülse vermieden, jedoch die Verdrehung der Teile gegeneinander ermöglicht. The engagement of the projection and the receiving opening causes a displacement of the parts of the bearing block in the directions of the longitudinal axes of the bearing bush and bearing sleeve avoided, but allows the parts to twist against each other.

Während bei Verwendung eines Vorsprungs in Form eines Kreiszylinders verhältnismäßig enge Toleranzen für die Abmessungen von Kreiszylindern und Aufnahmeöffnung eingehalten werden müssen, um eine in Richtung der Längsachsen von Lagerbuchse und Lagerhülse wirkendes Spiel zu vermeiden, wird bei Verwendung eines Vorsprungs in Form eines Kegels oder Kegelstumpfes selbsttätig eine spielfreie Kopplung erreicht. While when using a projection in the form of a circular cylinder relatively tight tolerances for the dimensions of circular cylinders and receiving opening must be adhered to in order to move one in the direction of the longitudinal axes of the bearing bush and To avoid play acting on the bearing sleeve, when using a projection in The shape of a cone or truncated cone automatically achieves a backlash-free coupling.

Wenn ein kreiszylindrischer Vorsprung eingesetzt wird, ist es zweckmäßig, um diesen und um die Aufnahmeöffnung bei gekoppelten Teilen in zueinander parallelen Ebenen, die parallel zu den Längsachsen von Lagerbuchse und Lagerhülse verlaufen, zur Anlage aneinander kommende Auflageflächen vorzusehen, so daß die Abstützung der beiden Teile in Richtung der Achse, um die die Verdrehung stattfindet, durch derartige Auflageflächen erfolgt und so die Stabilität der Kopplung erhöht wird. If a circular cylindrical projection is used, it is useful to around this and around the receiving opening in the case of coupled parts in parallel to each other Planes that run parallel to the longitudinal axes of the bearing bush and bearing sleeve, to provide contact surfaces coming into contact with one another, so that the support of the two parts in the direction of the axis about which the rotation takes place such contact surfaces takes place and so the stability of the coupling is increased.

Die Erfindung wird im folgenden anhand der schematisch und vereinfacht ein Ausführungsbeispiel zeigenden Figuren näher erläutert. The invention is schematically and simplified below with reference to FIG an embodiment showing figures explained in more detail.

F i g. 1 zeigt teilweise aufgebrochen die beiden im Abstand voneinander befindlichen Teile eines Lagerbockes mit nur teilweise dargestelltem Schreibarm. F i g. 1 shows the two partially broken away at a distance from one another located parts of a bearing block with only partially shown writing arm.

F i g. 2 zeigt einen Schnitt entlang der Linie ll-ll aus F i g. 1 durch den Lagerbock mit miteinander gekoppelten Teilen. F i g. 2 shows a section along the line II-II from FIG. 1 through the bearing block with parts coupled to one another.

Der dargestellte Lagerbock besteht aus einem oberen Teil 2 und einem unteren Teil 20. Am Teil 2 ist der Schreibarm 1 um die Achse 3 begrenzt schwenkbar befestigt, und er kann aus der in F i g. 1 angedeuteten Lage gegen den Druck der mit einem Ende an ihm befestigten und sich mit dem anderen Ende auf dem Teil 2 abstützenden Feder 4 etwas angehoben werden. Im Teil 2 ist eine sich mit ihrer Längsachse senkrecht zur Längserstreckung des Schreibarms 1 erstreckende Lagerbuchse 5 vorhanden, die in ihren Enden ringförmige Saphir-Lager 6 trägt. Diese Lagerbuchse dient beispielsweise zur Aufnahme der X-Führstange des Beschriftungs- und/ oder Zeichengerätes, d. h. der Schreibarm 1 wird bei Bewegung des Teils 2 entlang der X-Führstange in Richtung der X-Koordinate verlagert. The illustrated bearing block consists of an upper part 2 and one lower part 20. On part 2, writing arm 1 can be pivoted to a limited extent about axis 3 attached, and he can from the in F i g. 1 position against the pressure of the attached with one end to it and supported with the other end on the part 2 Spring 4 can be raised slightly. In part 2 one is perpendicular with its longitudinal axis for the longitudinal extension of the writing arm 1 extending bearing bushing 5 available, the carries ring-shaped sapphire bearings 6 in their ends. This bearing bush is used for example to accommodate the X-guide rod of the labeling and / or drawing device, d. H. the writing arm 1 is when moving the part 2 along the X-guide rod in the direction shifted to the X coordinate.

Im unteren Teil 20 ist eine Lagerhülse 25 ausgebildet, in der in axialer Richtung der Lagerhülse versetzt auf in F i g. 1 senkrechten Zapfen Kugellager 26, 27, 28 befestigt sind, denen jeweils ein entsprechendes Kugellager gegenüberliegt, wie dies durch die Anordnung der Kugellager 27,27' in F i g. 2 verdeutlicht ist. Um den Einbau dieser Kugellager zu ermöglichen, besteht das Teil 20 aus einem oberen Kastenelement 21 und einem unteren Deckelement 22, die mittels Schrauben lösbar miteinander verbunden sind. Von diesen Schrauben ist lediglich die Schraube 23 dargestellt (Fig. 1). In the lower part 20 a bearing sleeve 25 is formed, in which in offset in the axial direction of the bearing sleeve to in FIG. 1 vertical pin ball bearing 26, 27, 28 are attached, each facing a corresponding ball bearing, as indicated by the arrangement of the ball bearings 27, 27 'in FIG. 2 is clarified. In order to enable the installation of these ball bearings, the part 20 consists of an upper one Box element 21 and a lower cover element 22, which are detachable by means of screws are connected to each other. Of these screws, only screw 23 is shown (Fig. 1).

Mit der Lagerhülse 25 ist das Teil 20 auf die Y-Führstange 10 aufgesetzt, so daß die Kugellager in Eingriff mit der Y-Führstange stehen und das Teil 20 entlang dieser Führstange bewegt werden kann. With the bearing sleeve 25, the part 20 is placed on the Y-guide rod 10, so that the ball bearings are in engagement with the Y-guide rod and the part 20 along this guide rod can be moved.

Auf der oberen Fläche des Kastenelementes 21 des Teils 20 ist ein zylindrischer Vorsprung 29 ausgebildet, der von einer Auflagefläche 24 umgeben ist, die in F i g. 1 rechts in einem Absatz 25' endet. Entsprechend den Abmessungen des Vorsprungs 29 ist in der Auflagefläche 6 des Teils 20 eine Aufnahmeöffnung vorhanden, so daß das Teil 2 mit der Aufnahmeöffnung derart auf den Vorsprung 29 aufgesetzt werden kann, daß die Auflagefläche 6 auf der Auflagefläche 24 ruht. Infolge dieser Kopplung ist das Teil 2 um die Achse 30 des Vorsprungs 29 bezüglich des Teils 20 verdrehbar, wobei diese Verdrehung durch den Absatz 25' im Teil 20 begrenzt wird, an dem die in Fig 1 rechte untere Kante des Teils 2 nach einer gewissen Verdrehung zur Anlage kommt. On the upper surface of the box member 21 of the part 20 is a cylindrical projection 29 is formed, which is surrounded by a bearing surface 24, the in F i g. 1 ends on the right in a paragraph 25 '. Corresponding the dimensions of the Projection 29 is a receiving opening in the support surface 6 of the part 20, so that the part 2 with the receiving opening is placed on the projection 29 in this way it can be that the support surface 6 rests on the support surface 24. As a result of this The coupling is the part 2 about the axis 30 of the projection 29 with respect to the part 20 rotatable, this rotation being limited by the shoulder 25 'in part 20, on which the lower right edge of the part 2 in FIG. 1 after a certain rotation comes to the plant.

Ist das Teil 2 auf die X-Führstange und das Teil 20 auf die Y-Führstange 10 aufgesetzt und die Kopplung durch Eingriff des Vorsprungs 29 mit der Aufnahmeöffnung in der Auflagefläche 6 des Teils 2 hergestellt, so ergibt sich automatisch eine Ausrichtung der Teile 2 und 20 und damit der Längsachsen der Lagerbuchse 5 und der Lagerhülse 25 entsprechend der Ausrichtung der X- und der Y -Führstange, ohne daß bei Bewegung des Lagerbocks entlang einer Führstange oder beider Führstangen ein Blockieren dieser Bewegung stattfinden könnte. Is part 2 on the X-guide bar and part 20 on the Y-guide bar 10 placed and the coupling by engagement of the projection 29 with the receiving opening Produced in the support surface 6 of the part 2, this automatically results Alignment of parts 2 and 20 and thus the longitudinal axes of the bearing bush 5 and the Bearing sleeve 25 according to the alignment of the X and Y guide rod without when moving the bearing block along a guide rod or both guide rods Blocking this movement could take place.

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Claims

Claims: 1. Storage for the movable in the X and Y directions Writing arm of an automatic lettering and / or drawing device, with a Bearing block on which a bearing bush movable on the X guide rod and one on the Y-guide rod movable bearing sleeve is provided and on which the writing arm is perpendicular held limited pivotable to the longitudinal axes of the bearing bushing and bearing sleeve is that the bearing block consists of two parts (2; 20), of which one part (2) is the bearing bush (5) and the other part (20) the bearing sleeve (25) carries, and that the two parts (2; 20) around a perpendicular axis (30) running to the longitudinal axes of the bearing bush (5) and bearing sleeve (25) are rotatably coupled to one another.

2. Storage according to claim 1, characterized in that the one Part (20) in its surface (24) facing the other part (2) one with its Central axis coaxially to the axis (30) extending projection (29) in the form of a circular cylinder or a cone or truncated cone and that in the other part (2) in its the one part (20) facing surface (6) adapted to the shape of the projection (29) Receiving opening is provided.

3. Storage according to claim 2, characterized in that around the circular cylindrical Projection (29) and around the receiving opening when the parts (2; 20) are coupled to one another parallel planes that are parallel to the longitudinal axes of the bearing bush (5) and bearing sleeve (25) are provided, supporting surfaces (6; 24) coming to rest against one another are.

The invention relates to a storage for the in the X and Y directions movable writing arm of an automatic labeling and / or drawing device, with a bearing block on which a bearing bush movable on the X-guide rod and a bearing sleeve movable on the Y-guide rod is provided and on which the writing arm pivoted to a limited extent perpendicular to the longitudinal axes of the bearing bushing and bearing sleeve is held.

Such storage of a writing arm is at one time on the market, manufactured by the applicant automatic labeling device present, in which, for example, a tubular pen is inserted into the writing arm and the writing arm for creating labels and drawings moved over an area of a drawing pad with the aid of a control circuit will. The writing arm is then every time a Line to be made should be lowered so that the front end of the writing tube of the tube pen comes into contact with the drawing pad. The writing arm is swiveled perpendicular to the longitudinal axes of the bearing bush and bearing sleeve raised and thus the front end of the writing tube in a position above the drawing pad brought when the writing arm without creating lines related the Drawing pad is to be moved.

In the known storage, the bearing bush and the bearing sleeve formed perpendicular to each other in a one-piece bearing block. However, since the manufacture of such a bearing block with bearing bushing and bearing sleeve is unavoidable certain tolerances in the right-angled alignment of the longitudinal axis of the bearing bush occur to the longitudinal axis of the bearing sleeve, such a slight deviation must compensated by the right angle when mounting the labeling and / or drawing device because otherwise there is a blockage when moving the bearing block along the X-guide bar and / or occurs along the Y-guide bar. This adjustment takes place so that the X-guide bar is exactly horizontal for drawing exactly horizontal lines is aligned and that to compensate for deviations from the right angle a appropriate adjustment of the Y-guide rod is made. Such an adjustment the guide rods is dependent on the shape of the bearing block to be used however, very labor-intensive.

In another known drawing device of this type (DE-AS 12 in 802) are the X-guide rod and the Y-guide rod by mutually perpendicular, firmly interconnected slide bearing assemblies out. In connection with this Drawing device is mentioned that the bearings are designed and arranged in this way are intended to avoid jamming as much as possible, but without any indication how this could be achieved. It can therefore be assumed that even with this drawing device a relatively complex adjustment of the Guide bars is required.

It is the object of the invention to provide a storage for the writing arm of a To create a lettering and / or drawing device in which a subsequent adjustment of the two guide rods to each other depending on the accuracy of the position of Bearing bush and bearing sleeve on the bearing block to each other is avoided.

To solve this problem, a storage of the type mentioned at the beginning Kind according to the invention designed in such a way that the bearing block consists of two parts, one part of which carries the bearing bush and the other part the bearing sleeve, and that the two parts around one perpendicular to the longitudinal axes of the bearing bush and Bearing sleeve extending axis are rotatably coupled to one another.

In the case of the bearing block according to the invention, there is thus a separation of the bearing bush and bearing sleeve available, but they can be rotated against one another in the bearing block with one another are coupled. Therefore, the bearing bush on the X-guide rod and the bearing sleeve placed on the Y-guide rod and the two guide rods are exactly at right angles arranged to each other, the bearing bushing and bearing sleeve are also rotatable via the Coupling brought into a position that is exactly perpendicular to one another. It is therefore no longer required, on the unchangeable predefined in the known bearing block To take the position of the bearing block and bearing sleeve relative to each other into consideration and to compensate for this if necessary by adjusting at least one of the guide rods.