EP0280858B1 - Paper punch - Google Patents

Paper punch Download PDF

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Publication number
EP0280858B1
EP0280858B1 EP88100746A EP88100746A EP0280858B1 EP 0280858 B1 EP0280858 B1 EP 0280858B1 EP 88100746 A EP88100746 A EP 88100746A EP 88100746 A EP88100746 A EP 88100746A EP 0280858 B1 EP0280858 B1 EP 0280858B1
Authority
EP
European Patent Office
Prior art keywords
pressure
pressure lever
lever
pressure element
spring
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.)
Expired - Lifetime
Application number
EP88100746A
Other languages
German (de)
French (fr)
Other versions
EP0280858A2 (en
EP0280858A3 (en
Inventor
Gerhard Sixt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Louis Leitz Firma
Original Assignee
Louis Leitz Firma
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Louis Leitz Firma filed Critical Louis Leitz Firma
Priority to AT88100746T priority Critical patent/ATE74307T1/en
Publication of EP0280858A2 publication Critical patent/EP0280858A2/en
Publication of EP0280858A3 publication Critical patent/EP0280858A3/en
Application granted granted Critical
Publication of EP0280858B1 publication Critical patent/EP0280858B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26FPERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/02Perforating by punching, e.g. with relatively-reciprocating punch and bed
    • B26F1/04Perforating by punching, e.g. with relatively-reciprocating punch and bed with selectively-operable punches
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26FPERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/32Hand-held perforating or punching apparatus, e.g. awls
    • B26F1/36Punching or perforating pliers

Definitions

  • the invention relates to a letter punch with a lower part and a pivotally mounted on bearing blocks of the lower part, guided on two of the lower part, displaceably guided against the restoring force of a spring by means of a pressure element, at least one of the pressure elements in the raised position of the pressure lever optionally in one is displaceable with an effective position of the punch or an inactive position which is out of engagement with the punch and remains in the selected position when the pressure lever is depressed.
  • a letter punch of the type mentioned is known (US-A-1 655 315), in which a plurality of holes arranged at different distances from one another, held under the action of a spring in their upper end position, with the aid of pressure bodies displaceable on the pressure lever, optionally with the Push lever can be engaged.
  • a letter punch of the type mentioned is known (US-A-1 655 315), in which a plurality of holes arranged at different distances from one another, held under the action of a spring in their upper end position, with the aid of pressure bodies displaceable on the pressure lever, optionally with the Push lever can be engaged.
  • the invention has for its object to develop a letter punch of the type mentioned, which allows simple reduction, preferably a halving of the compressive force during the punching process and wherein the pressure body automatically returns to its effective position.
  • the invention is based on the idea that in the case of double or multiple perforations, a lower compressive force is required if the holes are introduced one after the other and not simultaneously.
  • the pressure body against the restoring force of a further spring is displaceable from its effective position into its inactive position, is locked in the inactive position when the pressure lever is depressed and after lifting the pressure lever under the action the other spring automatically returns to its effective position.
  • the displaceable pressure body is arranged in a recess of the pressure lever, which is preferably designed as a pressure plate, in such a way that it protrudes from the recess in its effective position and is pushed into the inactive position.
  • the pressure body according to the invention advantageously has a latching surface which, in the inactive position of the pressure body when the pressure plate is depressed, under the action of the spring against one arranged on the lower part Counter detent is present and can be released automatically when the pressure lever is lifted.
  • the displaceable pressure body has an extension which has a limit stop which bears against the pressure plate in the effective position of the pressure body and whose end face lying opposite the limit stop bears against the end face of the punch.
  • the recess receiving the displaceable pressure body is advantageously oriented obliquely to the top of the pressure plate.
  • the pressure body expediently has a helical spring which is supported against the pressure plate in a recess at the end opposite the end protruding from the pressure plate.
  • the letter punch essentially consists of a lower part 1 and a pressure lever 2 articulated on bearing blocks 10 of the lower part 1.
  • the punches 3 enclosed by a helical spring 4 are guided in the bearing blocks.
  • a pressure body formed on the underside of the pressure plate 2 acts in a known manner.
  • the pressure body 5 acts, which is guided in a recess that runs obliquely to the surface of the pressure lever 2, is cylindrical or is delimited by tabs 21, 21 ⁇ and against the restoring force of a coil spring 8 from the one in FIG. 1 drawn position, that is, when the punch hole is not actuated or before the punch hole is pressed, can be pressed into the recess.
  • the pressure body 5 has a shoulder 6, which extends obliquely to its longitudinal extent, with a shoulder 7.
  • the shoulder 7 rests against the underside of the pressure lever 2 and thus forms both a limit stop for the longitudinal movement of the pressure body 5 and also an abutment for the shoulder 6 when the end face of the shoulder 6 opposite the shoulder 7 opens when the punch hole is actuated the punch 4 acts (see. Fig. 2).

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Paper (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

The paper punch according to the invention has a device which enables the pressure lever (2) to act only on one of the pressure punches (4). For this purpose a pressure member (5) is arranged in a cutout of the pressure lever (2) so as to be displaceable counter to the restoring force of a spring (8). The pressure member (5) has a lug (6) which, in the position of rest of the pressure member (5), bears with one shoulder (7) against the underside of the pressure lever and with the end face lying opposite this shoulder (7) acts on the hole punch (4). On actuation of only one hole punch (4), the pressure member (5) is displaced, shortly before pivoting into its inactive position, and firmly held there until, on raising the pressure lever (2), it passes into its active position again under the action of the spring (8). <IMAGE>

Description

Die Erfindung betrifft einen Brieflocher mit einem Unterteil und einem an Lagerböcken des Unterteils schwenkbar gelagerten, auf zwei am Unterteil verschiebbar geführte Lochstempel gegen die Rückstellkraft einer Feder mittels je eines Druckkörpers einwirkenden Druckhebel, wobei mindestens einer der Druckkörper in der angehobenen Stellung des Druckhebels wahlweise in eine mit einem der Lochstempel in Eingriff stehende wirksame Stellung oder eine mit dem Lochstempel außer Eingriff stehende unwirksame Stellung verschiebbar ist und beim Niederdrücken des Druckhebels in der gewählten Stellung verbleibt.The invention relates to a letter punch with a lower part and a pivotally mounted on bearing blocks of the lower part, guided on two of the lower part, displaceably guided against the restoring force of a spring by means of a pressure element, at least one of the pressure elements in the raised position of the pressure lever optionally in one is displaceable with an effective position of the punch or an inactive position which is out of engagement with the punch and remains in the selected position when the pressure lever is depressed.

Um hartes Material oder einen Stapel von Briefbögen gleichzeitig ohne eine übermäßige Beanspruchung des Brieflochers lochen zu können, ist es an sich bekannt, zwei getrennte Druckhebel zu verwenden, die einzeln oder gemeinsam betätigt werden können.In order to be able to punch hard material or a stack of letterheads simultaneously without excessive stress on the letter punch, it is known per se to use two separate pressure levers which can be actuated individually or together.

Weiter ist ein Brieflocher der eingangs angegebenen Art bekannt (US-A-1 655 315), bei welchem eine Mehrzahl in unterschiedlichen Abständen voneinander angeordnete, unter der Einwirkung einer Feder in ihrer oberen Endstellung gehaltene Lochstempel mit Hilfe von am Druckhebel verschiebbaren Druckkörpern wahlweise mit dem Druckhebel in Eingriff gebracht werden können. Mit dieser Maßnahme können mit einfachen Mitteln unterschiedliche Lochabstände eingestellt werden. Eine Verringerung der Druckkraft beim Lochvorgang ist dort nicht beabsichtigt.Furthermore, a letter punch of the type mentioned is known (US-A-1 655 315), in which a plurality of holes arranged at different distances from one another, held under the action of a spring in their upper end position, with the aid of pressure bodies displaceable on the pressure lever, optionally with the Push lever can be engaged. With this measure, different hole spacings can be set with simple means. A decrease in Compression force during the punching process is not intended there.

Der Erfindung liegt die Aufgabe zugrunde einen Brieflocher der eingangs angegebenen Art zu entwickeln, der mit einfachen Mitteln wahlweise eine Verringerung, vorzugsweise eine Halbierung der Druckkraft beim Lochvorgang ermöglicht und wobei der Druckkörper selbsttätig in seine wirksame Stellung zurückgelangt.The invention has for its object to develop a letter punch of the type mentioned, which allows simple reduction, preferably a halving of the compressive force during the punching process and wherein the pressure body automatically returns to its effective position.

Zur Lösung dieser Aufgabe werden die im Patentanspruch 1 angegebenen Merkmale vorgeschlagen. Weitere vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.To achieve this object, the features specified in claim 1 are proposed. Further advantageous refinements and developments of the invention result from the subclaims.

Die Erfindung geht von dem Gedanken aus, daß bei einer Zwei- oder Mehrfachlochung eine geringere Druckkraft erforderlich ist, wenn die Löcher nacheinander und nicht gleichzeitig eingebracht werden. Um dies zu erreichen, wird gemäß der Erfindung vorgeschlagen, daß der Druckkörper gegen die Rückstellkraft einer weiteren Feder von seiner wirksamen Stellung in seine unwirksame Stellung verschiebbar ist, beim Niederdrücken des Druckhebels in der unwirksamen Stellung arretiert wird und nach dem Anheben des Druckhebels unter der Einwirkung der weiteren Feder selbsttätig in seine wirksame Stellung zurückgelangt.The invention is based on the idea that in the case of double or multiple perforations, a lower compressive force is required if the holes are introduced one after the other and not simultaneously. To achieve this, it is proposed according to the invention that the pressure body against the restoring force of a further spring is displaceable from its effective position into its inactive position, is locked in the inactive position when the pressure lever is depressed and after lifting the pressure lever under the action the other spring automatically returns to its effective position.

Für den Fall, daß einem Benutzer die Lochung eines Papierstapels in einem Arbeitsgang zu schwer fällt, kann er zunächst einen der Lochstempel durch Verschieben des zugehörigen Druckkörpers entgegen der Kraft der Feder in seine unwirksame Stellung verschieben. Wenn nun ein Hub beendet ist, gelangt der Druckkörper unter der Einwirkung der Feder automatisch wieder in seine Wirkstellung, so daß ohne Unterbrechung ein zweiter Hub unter Ausführung der zweiten Lochung durchgeführt werden kann. Durch die Führung des benachbarten Lochstempels in der ersten Lochung wird erreicht, daß der vorgeschriebene Lochabstand eingehalten wird.In the event that it is too difficult for a user to perforate a stack of paper in one work step, he can first move one of the punches into its inactive position by moving the associated pressure element against the force of the spring. When a stroke is now completed, the pressure body automatically returns to its operative position under the action of the spring, so that a second stroke can be carried out without interruption while executing the second perforation. By guiding the neighboring punch in the first perforation it is achieved that the prescribed hole spacing is maintained.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung ist der verschiebbare Druckkörper in einer Aussparung des vorzugsweise als Druckplatte ausgebildeten Druckhebels so angeordnet, daß er in seiner wirksamen Stellung aus der Aussparung herausragt und in der unwirksamen Stellung in diese eingeschoben ist.According to an advantageous embodiment of the invention, the displaceable pressure body is arranged in a recess of the pressure lever, which is preferably designed as a pressure plate, in such a way that it protrudes from the recess in its effective position and is pushed into the inactive position.

Der erfindungsgemäße Druckkörper weist vorteilhafterweise eine Rastfläche auf, die in der unwirksamen Stellung des Druckkörpers bei niedergedrückter Druckplatte unter der Einwirkung der Feder gegen eine am Unterteil angeordnete Gegenrast anliegt und beim Anheben des Druckhebels von dieser selbsttätig lösbar ist.The pressure body according to the invention advantageously has a latching surface which, in the inactive position of the pressure body when the pressure plate is depressed, under the action of the spring against one arranged on the lower part Counter detent is present and can be released automatically when the pressure lever is lifted.

Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung weist der verschiebbare Druckkörper einen Ansatz auf, der einen in der wirksamen Stellung des Druckkörpers gegen die Druckplatte anliegenden Begrenzungsanschlag aufweist und dessen dem Begrenzungsanschlag gegenüberliegende Stirnfläche gegen die Stirnfläche des Lochstempels anliegt. Die den verschiebbaren Druckkörper aufnehmende Aussparung ist dabei vorteilhafterweise schräg zur Oberseite der Druckplatte ausgerichtet. Zweckmäßig weist der Druckkörper an dem dem aus der Druckplatte herausragenden Ende gegenüberliegenden Ende in einer Aussparung eine gegen die Druckplatte sich abstützende Schraubenfeder auf.According to a further advantageous embodiment of the invention, the displaceable pressure body has an extension which has a limit stop which bears against the pressure plate in the effective position of the pressure body and whose end face lying opposite the limit stop bears against the end face of the punch. The recess receiving the displaceable pressure body is advantageously oriented obliquely to the top of the pressure plate. The pressure body expediently has a helical spring which is supported against the pressure plate in a recess at the end opposite the end protruding from the pressure plate.

Im folgenden wird die Erfindung anhand des in der Zeichnung in schematischer Weise dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:

Fig. 1
einen senkrechten Schnitt durch einen Brieflocher mit angehobenem Druckhebel;
Fig. 2
eine Darstellung entsprechend Fig. 1 bei betätigtem Druckhebel mit Druckkörper in seiner wirksamen Stellung;
Fig. 3
eine Darstellung entsprechend Fig. 1 und 2 bei betätigtem Druckhebel mit Druckkörper in seiner unwirksamen Stellung.
The invention is explained in more detail below with reference to the exemplary embodiment shown schematically in the drawing. Show it:
Fig. 1
a vertical section through a letter punch with the pressure lever raised;
Fig. 2
a representation corresponding to Figure 1 with the pressure lever actuated with the pressure body in its active position.
Fig. 3
a representation corresponding to FIGS. 1 and 2 when the pressure lever is actuated with the pressure body in its inactive position.

Der Brieflocher besteht im wesentlichen aus einem Unterteil 1 und einem an Lagerböcken 10 des Unterteils 1 angelenkten Druckhebel 2. In den Lagerböcken sind die von einer Schraubenfeder 4 umschlossenen Lochstempel 3 geführt. Auf den einen, in der Zeichnung nicht dargestellten Lochstempel wirkt in bekannter Weise ein an der Unterseite der Druckplatte 2 angeformter Druckkörper. Auf den anderen, in der Zeichnung dargestellten Lochstempel 3 wirkt der Druckkörper 5, der in einer schräg zur Oberfläche des Druckhebels 2 verlaufenden, zylindrischen oder durch Laschen 21, 21ʹ begrenzten Aussparung geführt ist und gegen die Rückstellkraft einer Schraubenfeder 8 aus der in Fig. 1 gezeichneten Stellung, also bei unbetätigtem Brieflocher bzw. vor Betätigung des Brieflochers, in die Aussparung hineingedrückt werden kann. Der Druckkörper 5 weist einen schräg zu seiner Längserstreckung sich erstreckenden Ansatz 6 mit einer Schulter 7 auf. Bei unbetätigtem Brieflocher liegt die Schulter 7 gegen die Unterseite des Druckhebels 2 an und bildet so sowohl einen Begrenzungsanschlag für die Längsbewegung des Druckkörpers 5 als auch ein Widerlager für den Ansatz 6, wenn die der Schulter 7 gegenüberliegende Stirnfläche des Ansatzes 6 bei Betätigung des Brieflochers auf den Lochstempel 4 einwirkt (vergl. Fig. 2).The letter punch essentially consists of a lower part 1 and a pressure lever 2 articulated on bearing blocks 10 of the lower part 1. The punches 3 enclosed by a helical spring 4 are guided in the bearing blocks. On the one punch, not shown in the drawing, a pressure body formed on the underside of the pressure plate 2 acts in a known manner. On the other punch 3 shown in the drawing, the pressure body 5 acts, which is guided in a recess that runs obliquely to the surface of the pressure lever 2, is cylindrical or is delimited by tabs 21, 21ʹ and against the restoring force of a coil spring 8 from the one in FIG. 1 drawn position, that is, when the punch hole is not actuated or before the punch hole is pressed, can be pressed into the recess. The pressure body 5 has a shoulder 6, which extends obliquely to its longitudinal extent, with a shoulder 7. When the punch hole is not actuated, the shoulder 7 rests against the underside of the pressure lever 2 and thus forms both a limit stop for the longitudinal movement of the pressure body 5 and also an abutment for the shoulder 6 when the end face of the shoulder 6 opposite the shoulder 7 opens when the punch hole is actuated the punch 4 acts (see. Fig. 2).

Wird nun vor Betätigung des Druckhebels 2 der Druckkörper 5 unter Überwindung der Rückstellkraft der Schraubenfeder 8 in die in Fig. 3 gezeigte Stellung verschoben, so gleitet der Ansatz 6 mit seiner Rastfläche 51 an der Gegenrast 11 des Lagerbocks 10 entlang und wird in dieser Stellung festgehalten, bis der Druckhebel 2 wieder nach oben zurückgeschwenkt wird und der Druckkörper 5 unter der Einwirkung der an einem Widerlager der Druckplatte 2 sich abstützenden Schraubenfeder in seine Wirkstellung gelangt.If the pressure element 5 is now moved into the position shown in FIG. 3 before the pressure lever 2 is actuated while overcoming the restoring force of the coil spring 8, the attachment 6 slides along with its latching surface 51 on the counter latch 11 of the bearing block 10 and is held in this position until the pressure lever 2 is pivoted back up and the pressure body 5 under the action of the helical spring supported on an abutment of the pressure plate 2 reaches its operative position.

Claims (7)

  1. Paper perforator with a bottom part (1) and a pressure lever (2) which is swivel-mounted on pillow blocks (10) of the bottom part (1) and acts against the restoring force of a spring (4), by means of a respective pressure element (5), on two hole punches (3) displaceably set on the bottom part (1), at least one of the pressure elements (5) when the pressure lever (2) is raised being displaceable as required into an operational position in engagement with one of the hole punches (3) or an inoperational position out of engagement with the hole punch (3) and remaining in the position selected when the pressure lever (2) is depressed,
    characterised in that the pressure element (5) is displaceable against the restoring force of an additional spring (8) from its operational position into its inoperational position, after displacement into the inoperational position is locked in this position when the pressure lever (2) is depressed, and after the pressure lever (2) is raised is automatically returned by the additional spring (8) to its operational position.
  2. Paper perforator according to claim 1, characterised in that the displaceable pressure element (5) is so disposed in a recess of the pressure lever (2) that in its operational position it protrudes from the recess and in the inoperational position it is inserted therein.
  3. Paper perforator according to claim 1 or 2, characterised in that the pressure element (5) incorporates a locking surface (51) which, when the pressure element (5) is in the inoperational position with the pressure lever (2) depressed, rests against a mating locking point (11) disposed on the bottom part (1) under the action of the spring, and when the pressure lever (2) is raised is automatically releasable therefrom.
  4. Paper perforator according to one of claims 1 to 3, characterised in that the pressure element (5) incorporates a lug (6) exhibiting a limit stop (7) which when the pressure element (5) is in the operational position rests against the pressure lever (2) and of which the end face opposite the limit stop (7) rests against the end face of the hole punch (3).
  5. Paper perforator according to claim 2 or to one of Claims 3 or 4 based on claim 2, characterised in that the recess accommodating the pressure element (5) runs at an angle to the upper face of the pressure lever.
  6. Paper perforator according to one of claims 1 to 5, characterised in that at its end opposite the end that protrudes beyond the pressure lever (2), the pressure element (5) incorporates, as the additional spring, a helical spring (8) disposed in a recess and resting against the pressure lever (2).
  7. Paper perforator according to one of claims 1 to 6, characterised in that the pressure element (5) incorporates a cylindrical shank.
EP88100746A 1987-03-02 1988-01-20 Paper punch Expired - Lifetime EP0280858B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88100746T ATE74307T1 (en) 1987-03-02 1988-01-20 MAILHOLE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873706695 DE3706695A1 (en) 1987-03-02 1987-03-02 LETTER HOLE
DE3706695 1987-03-02

Publications (3)

Publication Number Publication Date
EP0280858A2 EP0280858A2 (en) 1988-09-07
EP0280858A3 EP0280858A3 (en) 1990-12-05
EP0280858B1 true EP0280858B1 (en) 1992-04-01

Family

ID=6322115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88100746A Expired - Lifetime EP0280858B1 (en) 1987-03-02 1988-01-20 Paper punch

Country Status (5)

Country Link
EP (1) EP0280858B1 (en)
JP (1) JPS63229299A (en)
AT (1) ATE74307T1 (en)
DE (2) DE3706695A1 (en)
ES (1) ES2030770T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006027009B4 (en) * 2006-06-08 2011-09-15 Esselte Leitz Gmbh & Co. Kg paper punch
JP5875490B2 (en) * 2012-09-07 2016-03-02 典政 佐々木 2-hole punch

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE420124C (en) * 1922-09-30 1925-10-16 Henri Waldschmidt Adjustable punch, in which the pressure element acting on the punch is only in constant contact with a punch
US1655315A (en) * 1927-06-24 1928-01-03 Boorum & Pease Company Punch
US2764240A (en) * 1953-09-23 1956-09-25 Acco Products Inc Perforating devices

Also Published As

Publication number Publication date
DE3706695A1 (en) 1988-09-15
DE3869643D1 (en) 1992-05-07
ATE74307T1 (en) 1992-04-15
EP0280858A2 (en) 1988-09-07
ES2030770T3 (en) 1992-11-16
JPS63229299A (en) 1988-09-26
EP0280858A3 (en) 1990-12-05

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