EP0520190A1 - Mechanism for letter file - Google Patents
Mechanism for letter file Download PDFInfo
- Publication number
- EP0520190A1 EP0520190A1 EP92108586A EP92108586A EP0520190A1 EP 0520190 A1 EP0520190 A1 EP 0520190A1 EP 92108586 A EP92108586 A EP 92108586A EP 92108586 A EP92108586 A EP 92108586A EP 0520190 A1 EP0520190 A1 EP 0520190A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- base plate
- spring
- bent
- baseplate
- folding bracket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42F—SHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
- B42F13/00—Filing appliances with means for engaging perforations or slots
- B42F13/16—Filing appliances with means for engaging perforations or slots with claws or rings
- B42F13/20—Filing appliances with means for engaging perforations or slots with claws or rings pivotable about an axis or axes parallel to binding edges
- B42F13/22—Filing appliances with means for engaging perforations or slots with claws or rings pivotable about an axis or axes parallel to binding edges in two sections engaging each other when closed
- B42F13/24—Filing appliances with means for engaging perforations or slots with claws or rings pivotable about an axis or axes parallel to binding edges in two sections engaging each other when closed wherein one section is in the form of fixed rods
Definitions
- the invention relates to a folder mechanism with a base plate, two row pins protruding perpendicularly from one another on the base plate, a folding bracket which can be pivoted to a limited extent between an open position and a closed position about a pivot axis fixed to the base plate, and which can be coupled in the closed position with the row pins, one clamped against the base plate a cranking of the folding bracket under pretension in the direction of the open position spring and an actuating lever which is pivotably mounted on a bearing block fixed to the base plate and acts against the cranking of the folding bracket.
- Folder mechanisms of this type are intended for use in letter folders, which have a folder spine and a front and back cover articulated on the folder spine.
- the file mechanism is riveted to the back cover near the file back or inserted into a holding device provided for this purpose.
- the folder mechanism is moved from its closed position to its open position by lifting the actuating lever, in which perforated documents can be hung and unhooked on the alignment pins.
- the spring in this case has the task of automatically pivoting the folding bracket into its open position and holding it in the paper stack lined up on the folding bracket.
- the spring thus has the function of a return spring, which should rest against the bow offset under a defined preload in the open position of the bracket. An increase in the restoring force when closing the folder mechanism is inherently undesirable but not avoidable.
- the spring In conventional file mechanisms, the spring is usually designed as a trapezoidal or rectangular leaf spring clamped on one side to the base plate and with its other end acting against the offset. Studies have shown that the spring characteristic of a leaf spring is not optimal per se for the movement sequence when opening and closing the folder mechanism, because the spring forces acting on the bracket are relatively high in the closed position (given the pretension in the open position). In addition, the known leaf springs require a relatively large amount of material.
- the object of the invention is to improve the known folder mechanism of the type specified at the outset in such a way that the spring characteristic of the return spring acting on the crank of the folding bracket is better adapted to the closing process of the folder mechanism.
- the invention is based on the idea that the restoring force of the spring in the closed position of the folder mechanism increases as little as possible compared to the restoring force in the open position, taking into account the lowest possible expenditure on materials and production.
- the spring consists of a bent spring wire, which has two free ends at one each at a distance from the bow offset on the side of the Swivel axis arranged point of the base plate is clamped and which has two from the respective clamping point directed towards each other torsion sections and a bent at the mutually facing ends of the torsion sections in the direction of bow and bent against this, curved bending section.
- the torsion sections of the spring are aligned essentially parallel to the pivot axis of the folding bracket, while the bending section has bending legs which are essentially perpendicular to the torsion sections and are connected to one another by an arched or trapezoidal web resting against the offset.
- the free ends of the spring wire are advantageously inserted through the bores of the base plate forming the clamping point from top to bottom and are thus bent against the underside of the base plate and supported there so that the bending section of the spring wire protrudes obliquely over the base plate in the unloaded state and is thus pretensioned against the base plate Bend of the folding bracket is applied.
- torsion and bending sections ensures that the spring characteristic is significantly flatter than that of the leaf spring, which is only subjected to bending, so that a significantly lower restoring force is produced in the closed position.
- Another advantage of the invention is that both the cost of materials and the specific material costs of spring wire are considerably lower than with leaf springs, which leads to an overall cost saving of about 1: 7 for the spring. Since folder mechanics are mass-produced items, this one has Advantage a special weight.
- the folder mechanism shown in the drawing consists essentially of a base plate 10, two line-up pins 12 projecting vertically at a distance from one another on the base plate 10, a folding bracket 18 pivotable to a limited extent in the mounting brackets 16 of the base plate about a pivot axis that is fixed to the base plate between an open position and a closed position the base plate clamped against a crank 26 of the folding bracket under tension in the direction of the open position spring 24 and a pivotally mounted on a base plate fixed bearing plate 20, from above against the crank of the folding bracket 18 operating lever 22.
- the spring 24 consists of curved spring wire, the free Ends 30 are inserted through bores 32 of the base plate 10 from top to bottom and bent under the tension of the spring against the underside of the base plate 10 and are supported there.
- the spring wire 24 also has two torsion sections 34 which are directed towards one another from the clamping point 32 and are oriented essentially parallel to the pivot axis of the folding bracket 18, and one facing the mutually facing one Ends 36 of the torsion sections bent in the direction of offset 26, arcuate bending section 38.
- the bending section is subdivided into two bending legs 40, which adjoin the torsion sections 34 essentially perpendicularly, and an arch-shaped (FIG. 2) or trapezoidal (FIG. 3) web 42 which connects the bow legs to one another and bears against the crank 26 from below.
- spring wire is pulled from a coil, deflected and preformed in a bending tool. Following the preforming, the spring is inserted into the prepared holes 32 in the base plate. In a subsequent operation, the free ends extending through the base plate are bent over such that the spring is rigidly supported on the rear side of the base plate 10 while inclining its bending section.
- the invention relates to a folder mechanism with a base plate 10, two line-up pins 12 projecting vertically on the base plate, a folding bracket 18 which can be pivoted to a limited extent between an open position and a closed position and a clamped on the base plate 10 against a crank 26 of the folding bracket under pretension in the direction of the open position acting spring 24 and an actuating lever 22 pivotably mounted on a bearing plate 20 which is fixed to the base plate and acts against the offset 26 of the folding bracket 18 that is at its two free ends 30 is clamped in bores 32 of the base plate and has two torsion sections 34 directed towards one another from the clamping point 32 and one at the mutually facing ends 36 of the torsion sections 34 bent in the direction of the bow offset 26 and against which the curved bending section 38 abuts.
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- Sheet Holders (AREA)
- Saccharide Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Clamps And Clips (AREA)
Abstract
Description
Die Erfindung betrifft eine Ordnermechanik mit einer Grundplatte, zwei im Abstand voneinander an der Grundplatte senkrecht überstehenden Aufreihstiften, einem zwischen einer Offenstellung und einer Schließstellung um eine grundplattenfeste Schwenkachse begrenzt verschwenkbaren, in der Schließstellung mit den Aufreihstiften kuppelbaren Umlegebügel, einer an der Grundplatte eingespannten, gegen eine Kröpfung des Umlegebügels unter Vorspannung in Richtung Offenstellung einwirkenden Feder und einem an einem grundplattenfesten Lagerbock schwenkbar gelagerten, gegen die Kröpfung des Umlegebügels wirkenden Betätigungshebel.The invention relates to a folder mechanism with a base plate, two row pins protruding perpendicularly from one another on the base plate, a folding bracket which can be pivoted to a limited extent between an open position and a closed position about a pivot axis fixed to the base plate, and which can be coupled in the closed position with the row pins, one clamped against the base plate a cranking of the folding bracket under pretension in the direction of the open position spring and an actuating lever which is pivotably mounted on a bearing block fixed to the base plate and acts against the cranking of the folding bracket.
Ordnermechaniken dieser Art sind für den Einsatz in Briefordnern bestimmt, die einen Ordnerrücken und je einen am Ordnerrücken angelenkten Vorder- und Rückdeckel aufweisen. Die Ordnermechanik wird dabei in der Nähe des Ordnerrückens am Rückdeckel angenietet oder in eine hierfür vorgesehene Haltevorrichtung eingeschoben. Die Ordnermechanik wird durch Lüften des Betätigungshebels von seiner Schließstellung in seine Offenstellung gebracht, in der gelochtes Schriftgut an den Aufreihstiften ein- und ausgehängt werden kann. Die Feder hat hierbei die Aufgabe, den Umlegebügel gegebenenfalls mit dem auf dem Umlegebügel aufgereihten Papierstapel selbsttätig in seine Offenstellung zu verschwenken und in dieser zu halten. Die Feder hat also die Funktion einer Rückstellfeder, die in der Offenstellung des Bügels unter einer definierten Vorspannung gegen die Bügelkröpfung anliegen sollte. Eine Zunahme der Rückstellkraft beim Schließen der Ordnermechanik ist an sich unerwünscht aber nicht zu vermeiden. Bei herkömmlichen Ordnermechaniken ist die Feder üblicherweise als an ihrer einen Seite an der Grundplatte eingespannte und mit ihrem anderen Ende gegen die Kröpfung wirkende, trapezförmige oder rechteckige Blattfeder ausgebildet. Untersuchungen haben gezeigt, daß die Federcharakteristik einer Blattfeder für den Bewegungsablauf beim Öffnen und Schließen der Ordnermechanik an sich nicht optimal ist, weil die auf den Bügel wirkenden Federkräfte in der Schließstellung (bei gegebener Vorspannung in der Offenstellung) verhältnismäßig hoch sind. Hinzu kommt, daß die bekannten Blattfedern einen relativ hohen Materialaufwand erfordern.Folder mechanisms of this type are intended for use in letter folders, which have a folder spine and a front and back cover articulated on the folder spine. The file mechanism is riveted to the back cover near the file back or inserted into a holding device provided for this purpose. The folder mechanism is moved from its closed position to its open position by lifting the actuating lever, in which perforated documents can be hung and unhooked on the alignment pins. The spring in this case has the task of automatically pivoting the folding bracket into its open position and holding it in the paper stack lined up on the folding bracket. The spring thus has the function of a return spring, which should rest against the bow offset under a defined preload in the open position of the bracket. An increase in the restoring force when closing the folder mechanism is inherently undesirable but not avoidable. In conventional file mechanisms, the spring is usually designed as a trapezoidal or rectangular leaf spring clamped on one side to the base plate and with its other end acting against the offset. Studies have shown that the spring characteristic of a leaf spring is not optimal per se for the movement sequence when opening and closing the folder mechanism, because the spring forces acting on the bracket are relatively high in the closed position (given the pretension in the open position). In addition, the known leaf springs require a relatively large amount of material.
Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, die bekannte Ordnermechanik der eingangs angegebenen Art dahingehend zu verbessern, daß die Federcharakteristik der auf die Kröpfung des Umlegebügels einwirkenden Rückstellfeder besser an den Schließvorgang der Ordnermechanik angepaßt ist.Proceeding from this, the object of the invention is to improve the known folder mechanism of the type specified at the outset in such a way that the spring characteristic of the return spring acting on the crank of the folding bracket is better adapted to the closing process of the folder mechanism.
Zur Lösung dieser Aufgabe wird die im Patentanspruch angegebene Merkmalskombination vorgeschlagen. Weitere vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.To achieve this object, the combination of features specified in the claim is proposed. Further advantageous refinements and developments of the invention result from the dependent claims.
Die Erfindung geht von dem Gedanken aus, daß die Rückstellkraft der Feder in der Schließstellung der Ordnermechanik möglichst wenig gegenüber der Rückstellkraft in der Offenstellung ansteigt, und zwar unter Berücksichtigung eines möglichst geringen Material- und Fertigungsaufwandes. Um dies zu erreichen wird gemäß der Erfindung vorgeschlagen, daß die Feder aus einem gebogenen Federdraht besteht, der an seinen beiden freien Enden an je einer im Abstand von der Bügelkröpfung auf der Seite der Schwenkachse angeordneten Stelle der Grundplatte eingespannt ist und der zwei von der jeweiligen Einspannstelle aus aufeinanderzu gerichtete Torsionsabschnitte sowie einen an den einander zugewandten Enden der Torsionsabschnitte in Richtung Bügelkröpfung abgebogenen und gegen diese anliegenden, bogenförmigen Biegeabschnitt aufweist.The invention is based on the idea that the restoring force of the spring in the closed position of the folder mechanism increases as little as possible compared to the restoring force in the open position, taking into account the lowest possible expenditure on materials and production. In order to achieve this, it is proposed according to the invention that the spring consists of a bent spring wire, which has two free ends at one each at a distance from the bow offset on the side of the Swivel axis arranged point of the base plate is clamped and which has two from the respective clamping point directed towards each other torsion sections and a bent at the mutually facing ends of the torsion sections in the direction of bow and bent against this, curved bending section.
Gemäß einer bevorzugten Ausgestaltung der Erfindung sind die Torsionsabschnitte der Feder im wesentlichen parallel zur Schwenkachse des Umlegebügels ausgerichtet, während der Biegeabschnitt im wesentlichen senkrecht an die Torsionsabschnitte anschließende Biegeschenkel aufweist, die durch einen gegen die Kröpfung anliegenden bogenförmigen oder trapezförmigen Steg miteinander verbunden sind. Die freien Enden des Federdrahts sind vorteilhafterweise durch die Einspannstelle bildende Bohrungen der Grundplatte von oben nach unten hindurchgesteckt und so gegen die Unterseite der Grundplatte gebogen und dort abgestützt, daß der Biegeabschnitt des Federdrahts im unbelasteten Zustand schräg über die Grundplatte übersteht und somit unter Vorspannung gegen die Kröpfung des Umlegebügels anliegt.According to a preferred embodiment of the invention, the torsion sections of the spring are aligned essentially parallel to the pivot axis of the folding bracket, while the bending section has bending legs which are essentially perpendicular to the torsion sections and are connected to one another by an arched or trapezoidal web resting against the offset. The free ends of the spring wire are advantageously inserted through the bores of the base plate forming the clamping point from top to bottom and are thus bent against the underside of the base plate and supported there so that the bending section of the spring wire protrudes obliquely over the base plate in the unloaded state and is thus pretensioned against the base plate Bend of the folding bracket is applied.
Durch die erfindungsgemäße Kombination von Torsions- und Biegeabschnitten wird erreicht, daß die Federcharakteristik deutlich flacher als die der rein auf Biegung beanspruchten Blattfeder ist, so daß in der Schließstellung eine deutlich geringere Rückstellkraft entsteht. Ein weiterer Vorteil der Erfindung besteht darin, daß sowohl der Materialaufwand als auch die spezifischen Materialkosten von Federdraht erheblich geringer sind als bei Blattfedern, was insgesamt zu einer Kostenersparnis von etwa 1:7 bei der Feder führt. Da es sich bei Ordnermechaniken um Massenartikel handelt, besitzt dieser Vorteil ein besonderes Gewicht.The combination of torsion and bending sections according to the invention ensures that the spring characteristic is significantly flatter than that of the leaf spring, which is only subjected to bending, so that a significantly lower restoring force is produced in the closed position. Another advantage of the invention is that both the cost of materials and the specific material costs of spring wire are considerably lower than with leaf springs, which leads to an overall cost saving of about 1: 7 for the spring. Since folder mechanics are mass-produced items, this one has Advantage a special weight.
Im folgenden wird die Erfindung anhand einiger in der Zeichnung in schematischer Weise dargestellter Ausführungsbeispiele näher erläutert. Es zeigen:
- Fig. 1
- eine Seitenansicht einer Ordnermechanik;
- Fig. 2
- eine Draufsicht auf eine Ordnermechanik ohne Betätigungshebel;
- Fig. 3
- eine Draufsicht auf ein abgewandeltes Ausführungsbeispiel einer Ordnermechanik.
- Fig. 1
- a side view of a folder mechanism;
- Fig. 2
- a plan view of a folder mechanism without an operating lever;
- Fig. 3
- a plan view of a modified embodiment of a folder mechanism.
Die in der Zeichnung dargestellte Ordnermechanik besteht im wesentlichen aus einer Grundplatte 10, zwei im Abstand voneinander an der Grundplatte 10 senkrecht überstehenden Aufreihstiften 12, einem in Lagerlaschen 16 der Grundplatte um eine grundplattenfeste Schwenkachse zwischen einer Offenstellung und einer Schließstellung begrenzt verschwenkbaren Umlegebügel 18, einer an der Grundplatte eingespannten, gegen eine Kröpfung 26 des Umlegebügels unter Vorspannung in Richtung Offenstellung einwirkenden Feder 24 und einem an einem grundplattenfesten Lagerschild 20 schwenkbar gelagerten, von oben gegen die Kröpfung des Umlegebügels 18 einwirkenden Betätigungshebel 22. Die Feder 24 besteht aus gebogenem Federdraht, dessen freie Enden 30 durch Bohrungen 32 der Grundplatte 10 von oben nach unten hindurchgesteckt und unter Einspannung der Feder gegen die Unterseite der Grundplatte 10 gebogen und dort abgestützt sind. Der Federdraht 24 weist ferner zwei von der Einspannstelle 32 aus aufeinanderzu gerichtete, im wesentlichen parallel zur Schwenkachse des Umlegebügels 18 ausgerichtete Torsionsabschnitte 34 sowie einen an den einander zugewandten Enden 36 der Torsionsabschnitte in Richtung Kröpfung 26 abgebogenen, bogenförmigen Biegeabschnitt 38 auf. Der Biegeabschnitt ist dabei in zwei im wesentlichen senkrecht an die Torsionsabschnitte 34 anschließende Biegeschenkel 40 sowie einen die Bügelschenkel miteinander verbindenden, von unten gegen die Kröpfung 26 anliegenden bogenförmigen (Fig. 2) oder trapezförmigen (Fig. 3) Steg 42 unterteilt.The folder mechanism shown in the drawing consists essentially of a
Zur Herstellung der beschriebenen Torsions- und Biegefeder wird Federdraht von einem Coil abgezogen, abgelenkt und in einem Biegewerkzeug vorgeformt. Im Anschluß an die Vorformung wird die Feder in die vorbereiteten Bohrungen 32 der Grundplatte eingesetzt. In einem anschließenden Arbeitsgang werden die freien, durch die Grundplatte hindurchgreifenden Enden so umgebogen, daß die Feder unter schräger Anstellung ihres Biegeabschnitts sich an der Rückseite der Grundplatte 10 starr abstützt.To produce the torsion and bending spring described, spring wire is pulled from a coil, deflected and preformed in a bending tool. Following the preforming, the spring is inserted into the prepared
Zusammenfassend ist folgendes festzustellen:
Die Erfindung bezieht sich auf eine Ordnermechanik mit einer Grundplatte 10, zwei an der Grundplatte senkrecht überstehenden Aufreihstiften 12, einem zwischen einer Offenstellung und einer Schließstellung begrenzt verschwenkbaren Umlegebügel 18 einer an der Grundplatte 10 eingespannten, gegen eine Kröpfung 26 des Umlegebügels unter Vorspannung in Richtung Offenstellung einwirkenden Feder 24 und einem an einem grundplattenfesten Lagerschild 20 schwenkbar gelagerten, gegen die Kröpfung 26 des Umlegebügels 18 wirkenden Betätigungshebel 22. Um bei gleichzeitig wirtschaftlicher Bauweise eine für den Öffnungs- und den Schließvorgang günstige Federcharakteristik zu erzielen, wird die Feder 24 aus gebogenem Federdraht hergestellt, der an seinen beiden freien Enden 30 in Bohrungen 32 der Grundplatte eingespannt ist und der zwei von der Einspannstelle 32 aus aufeinanderzu gerichtete Torsionsabschnitte 34 sowie einen an den einander zugewandten Enden 36 der Torsionsabschnitte 34 in Richtung Bügelkröpfung 26 abgebogenen und gegen diesen anliegenden bogenförmigen Biegeabschnitt 38 aufweist.In summary, the following can be stated:
The invention relates to a folder mechanism with a
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4120717 | 1991-06-22 | ||
| DE4120717A DE4120717A1 (en) | 1991-06-22 | 1991-06-22 | FOLDER MECHANICS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0520190A1 true EP0520190A1 (en) | 1992-12-30 |
| EP0520190B1 EP0520190B1 (en) | 1995-02-15 |
Family
ID=6434565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92108586A Expired - Lifetime EP0520190B1 (en) | 1991-06-22 | 1992-05-21 | Mechanism for letter file |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0520190B1 (en) |
| AT (1) | ATE118410T1 (en) |
| DE (2) | DE4120717A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1980412A1 (en) * | 2007-04-11 | 2008-10-15 | World Wide Stationery Manufacturing Company, Limited | Lever-arch type file mechanism |
| EP2002990A1 (en) * | 2007-06-11 | 2008-12-17 | World Wide Stationary Manufacturing | A lever-arch type file mechanism |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2702042A1 (en) * | 1977-01-19 | 1978-07-20 | Aulfes Bayerwald Plastik | File document securing device - has wire spring acting against crank webs of pivoting stirrup |
-
1991
- 1991-06-22 DE DE4120717A patent/DE4120717A1/en not_active Withdrawn
-
1992
- 1992-05-21 DE DE59201387T patent/DE59201387D1/en not_active Expired - Fee Related
- 1992-05-21 EP EP92108586A patent/EP0520190B1/en not_active Expired - Lifetime
- 1992-05-21 AT AT92108586T patent/ATE118410T1/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2702042A1 (en) * | 1977-01-19 | 1978-07-20 | Aulfes Bayerwald Plastik | File document securing device - has wire spring acting against crank webs of pivoting stirrup |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1980412A1 (en) * | 2007-04-11 | 2008-10-15 | World Wide Stationery Manufacturing Company, Limited | Lever-arch type file mechanism |
| EP2002990A1 (en) * | 2007-06-11 | 2008-12-17 | World Wide Stationary Manufacturing | A lever-arch type file mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0520190B1 (en) | 1995-02-15 |
| DE59201387D1 (en) | 1995-03-23 |
| ATE118410T1 (en) | 1995-03-15 |
| DE4120717A1 (en) | 1992-12-24 |
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