EP0121580A1 - Perforateur manuel pour papier - Google Patents

Perforateur manuel pour papier Download PDF

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Publication number
EP0121580A1
EP0121580A1 EP83103319A EP83103319A EP0121580A1 EP 0121580 A1 EP0121580 A1 EP 0121580A1 EP 83103319 A EP83103319 A EP 83103319A EP 83103319 A EP83103319 A EP 83103319A EP 0121580 A1 EP0121580 A1 EP 0121580A1
Authority
EP
European Patent Office
Prior art keywords
punch
guide
punch according
hole
facing
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.)
Ceased
Application number
EP83103319A
Other languages
German (de)
English (en)
Inventor
Adolf Böhm
Volker Hoffmann
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.)
Elba-Ordner-Fabrik Kraut & Meienborn & Co GmbH
Original Assignee
Elba-Ordner-Fabrik Kraut & Meienborn & Co GmbH
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 Elba-Ordner-Fabrik Kraut & Meienborn & Co GmbH filed Critical Elba-Ordner-Fabrik Kraut & Meienborn & Co GmbH
Priority to EP83103319A priority Critical patent/EP0121580A1/fr
Publication of EP0121580A1 publication Critical patent/EP0121580A1/fr
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/32—Hand-held perforating or punching apparatus, e.g. awls
    • B26F1/36—Punching or perforating pliers

Definitions

  • the present invention relates to a hole punch, in particular for paper and cardboard products, consisting of a base plate forming the cutting die with mounting brackets attached to the top thereof, consisting essentially of two walls with guide holes aligned with one another, each surrounded by a return spring between the walls and positively connected to the latter Punches, a pressure lever acting on the punches being pivoted in the bearing brackets.
  • Such a punch is known for example from DE-PS 15 36 703.
  • these known punches have the following disadvantages.
  • the assembly of the punch within the bearing brackets must be done with special tools, the return spring with such a special tool being used in the compressed state between the two walls in alignment with the guide holes aligned with each other. Then the punch is inserted from below until one in the punch. located ring groove comes to rest on the compressed spring. Then a locking washer is pressed radially into the ring groove from the side. This is also done with a special tool.
  • the compression spring can now be relaxed, whereby it is supported on the two walls in the region of the guide holes.
  • the assembly process described above must be carried out by hand, so that this results in a high expenditure of time and thus high assembly costs. In addition, it is not suitable for automation.
  • brackets must be designed in such a way that the return spring and the locking washer can be inserted from the side using special tools, which is why only an open design of the bearing bracket is possible.
  • the present invention has for its object to avoid the above disadvantages in a punch of the type described above and to improve it in such a way that assembly of the punch together with the return spring is possible without the use of special tools and in the relaxed state of the spring.
  • the upper guide hole facing the pressure lever has at least one diameter corresponding to the outer diameter of the return spring and a guide bushing for the punch is used in a self-retaining manner.
  • This configuration according to the invention makes it possible to insert the non-tensioned return spring together with the retaining ring from above into the bearing bracket, without the use of special tools. This can be done easily by hand, but this assembly is also ideal for automation.
  • the guide bushing is inserted into the guide hole, this being designed to be radially elastic so that it can be compressed when inserted in the sense of a reduction in diameter and can spring back after insertion and thus sits self-retaining within the guide hole. The return spring can then be supported on one side on the guide bush.
  • the punch can now be inserted from below or from above in a known manner until the retaining ring, which is preferably preassembled on the return spring, snaps into the annular groove of the punch, whereby the punch is held within the bearing bracket by support on the return spring.
  • a hole punch according to the invention consists of a base plate 1, which forms the cutting die of the hole punch, on the top of which bearing brackets 2 are fastened parallel to its longitudinal edges.
  • the base plate 1 forming the cutting die can consist, for example, of sheet steel or cast aluminum or also of plastic.
  • the bearing brackets 2 can, for example, be fastened to the base plate by riveting.
  • the base plate with the bearing brackets can, for example, also be formed in one piece, for example in the case of a design made of plastic or cast aluminum.
  • the bearing brackets 2 are preferably closed by side walls 3, as can be seen from FIG. 1. As shown in Fig.
  • the bearing brackets consist essentially of two parallel, horizontal walls 4, 5, the wall 4 facing the base plate 1 being connected directly to the base plate 1.
  • the wall 4 has a step-shaped shoulder 6, so that a slot 7 is formed between the base plate 1 and the shoulder 6, into which the document to be punched can be inserted.
  • Guide holes 8, 9 are formed in the walls 4, 5 and are used to guide punch 10.
  • the punch 10 are concentrically surrounded by a return spring 12 acting as a compression spring. This return spring 12 is preferably designed as a spiral spring.
  • a pressure lever 13 is pivotally mounted, which acts on the punch 10 in such a way that when the pressure lever 13 is pivoted in the direction of the arrow X, the punch is pressed down in the direction of the base plate 1.
  • the return springs 12 surrounding the punch 10 are non-positively connected to the punch by being supported at their upper end facing the pressure lever 13 on a locking ring 14 which is positively connected to the respective punch running through it. With the other lower end, the return springs 12 are supported on the horizontal wall 4 in the area of the shoulder 6.
  • a punch is shown with two punches 10, one punch being guided in the area of one of the bearing brackets 2. However, there are also punches with more than two punches within the scope of the present invention.
  • a schnitzel box 15 is formed, which is closed on its underside by a removable bottom 16.
  • the peculiarity of the punch according to the invention now consists in the guiding of the punch 10 in the two horizontal walls 4, 5 or in their guide holes 8, 9, for which reference is made to FIG. 3.
  • the upper, the pressure lever 13 facing guide hole 8 is larger in diameter than the lower, the base plate 1 facing guide hole 9.
  • the diameter is adapted to the outer diameter of the return spring 12 such that the return spring 12 with the its upper end of the circlip 14 can be inserted from above through the guide hole 8 until the return spring 12 rests with its lower end on the shoulder 6 of the horizontal wall 4.
  • the return spring 12 then surrounds the lower guide hole 9 concentrically, so that the longitudinal axis of the return spring 12 coincides with the central axis of the guide holes 8, 9 aligned with one another.
  • the locking ring 14 is preferably designed such that it has a peripheral edge region 17 which is bent in the direction of the base plate 1 and which includes the return spring 12. This ensures a secure support of the locking ring 14 on the upper end of the return spring 12 so that the locking ring cannot fall off the return spring 12.
  • a guide bushing 18 is inserted into the guide hole 8 from above.
  • the guide bush 18 consists of a Radially elastic cylinder body 19, which has an upper annular collar 20, with which the guide bush rests against the upper side of the wall 4 in the inserted state, see in particular FIG. 3.
  • the annular collar 20 is followed by a receiving groove 22, in which, in the inserted state, the Edge of the guide hole 8 runs.
  • the outer diameter of the groove 22 thus corresponds to the diameter of the guide hole 8.
  • the receiving groove 22 is adjoined at the bottom by an annular cone 23 which, when the guide bush 18 is inserted, bears against the underside of the wall 4.
  • the guide bushing 18 has at least one, in the exemplary embodiment shown, four slots 24 which are axially offset from one another by 90 ° through the wall of the cylinder body 19 from the annular collar 20. Through these slots 24, the radial elasticity of the guide bush 18 is achieved so that it can be inserted into the guide hole 8 from above, then over the ring cone 23, the cone surface of which widens from the lower end upwards, ie that the outer diameter of the ring cone from the lower end, increases upwards, when the guide bushing 18 is inserted, it is radially compressed, and as soon as the receiving groove 22 lies within the guide hole 8, the cylinder body 19 can spring back in the region below the ring collar, so that the ring cone 13 engages behind the wall 5, so that the guide bush 18 is locked within the guide hole 8, the width of the receiving groove 22 being adapted to the thickness of the wall 5.
  • the guide bushing 18 has an inner through bore 25 which, like the lower guide hole 9, is adapted in its diameter to the outer diameter of the punch 10.
  • the locking ring 14 is preferably made of spring steel.
  • the respective punch 10 protrudes with its upper end out of the guide bush 18, as can be seen from FIG. 2.
  • the pressure lever 13 can be stored within the bearing brackets 2 by means of a pivot axis 28. Due to the positive connection between the punch and the locking ring, the punch is held by support on the return spring within the bearing bracket and is guided on the one hand in the guide bushing 18 and on the other hand in the lower guide hole 9.
  • the return spring 12 is dimensioned such that it is supported in the relaxed state on the one hand on the wall 4 and on the other hand via the locking ring 14 on the guide bush 18.
  • the individual punch can also be easily assembled without special tools, even with a storage bracket closed on all sides, by simply inserting it from above or from below.
  • a fully automatic punching of the punch can thus take place, so that extensive automation of the manufacture of the punch according to the invention is possible.
  • FIG. 9 shows a further expedient embodiment of a guide bush 32 according to the invention.
  • This has a cylinder body 33 which can be designed like the cylinder body 19 according to FIG. 5.
  • this guide bushing 32 additionally has an extension 34, which can consist, for example, of two webs 35 lying opposite one another. These webs 35 can, for example, be formed on the underside of the ring cone 23.
  • the length of the extension 34 corresponds to the length of the return spring 12 in the relaxed condition.
  • an annular disc 36 is formed, which has a central opening 37.
  • the respective associated punch can also be pre-assembled before »inserting the guide bush 32, so that the guide bush pre-assembled in this way, provided with a return spring and punch, can then be used.
  • the central opening 37 of the annular disk 36 preferably has a diameter such that the projection 29 shown in FIG. 8 projects into this central opening 37, as a result of which the guide bush 32 is securely mounted and held.
  • FIG. 10 An alternative embodiment of the guide bushing 32 is shown in FIG. 10, the same parts as in FIG. 9 being provided with the same reference numbers.
  • the embodiment of the cylinder body is different here. This is designed here as a cone body 39, the diameter of the cone body decreasing from top to bottom. This configuration of the cone body 39 corresponds to an inner contour of the guide hole 8. This results in a centering of the guide bush 32, which is achieved in the embodiment in the previous examples by the resilient contact of the radially elastic cylinder body on the hole wall.
  • latching lugs 40 are formed which, after the cone body 39 has been inserted into the guide hole 8, engage behind it and engage from below lay against the underside of the wall 9 so that the guide bush 32 is locked.
  • a further expedient embodiment of the annular disk 36 according to FIGS. 9 and 10 can consist, see FIG. 12, that a guide bush 51 is formed on the underside thereof, which surrounds the opening 37.
  • the diameter of the opening 37 is then such that it corresponds to the outer diameter of the punch, so that it is guided in the guide bush.
  • the outer diameter of the guide bush corresponds to the diameter of the guide hole 9, so that the extension is securely held.
  • the guide bush also extends into the extension, whereby the spring 12 is fixed.
  • FIG. 11 shows a further embodiment of a guide bush according to the invention.
  • This consists of a cap 42 made of plastic, which forms the head of the respective punch 10 by embracing the end of the same and being connected to it in a positive manner.
  • the cap 42 has an interior 43 into which the punch end protrudes and is held in a form-fitting manner therein.
  • the cap 42 is closed on its upper side 44 and has an opening 45 on the opposite side through which the punch 10 runs.
  • the opening 45 is formed by a circumferential, radially aligned edge web 46, which is formed on the inside of the vertical cap walls 47.
  • the edge web 46 protrudes into the annular groove 26 of the punch 10, whereby the positive connection is achieved.
  • the cap 42 can be sprayed directly onto the end of the punch.
  • the return spring 12 is supported this embodiment at one end on the underside of the cap 42 and at the other end, which is not shown, on the lower wall 4.
  • the cap Following the edge web '46, the cap has a wall section in which an annular groove 50 which is open to the cap end face 49 is formed , whereby the cap is radially elastic in this area.
  • the locking lugs 48 are wedge-shaped and taper in the direction of the end face 49, which makes it easier to insert the cap into the guide hole 8.
  • the punch is inserted with the cap 42 attached to it from above through the guide hole, the cap being able to be radially compressed when inserted due to the radial flexibility in the area of the groove 50 so that it fits through the guide hole 8 with the latching projections 48 .
  • the cap walls 47 can spring back, so that the locking lugs 48 engage behind the underside of the wall 5.
  • This embodiment of the guide bush according to the invention also allows the return spring 12 to be preassembled on the respective punch 10, so that the punch with the return spring and guide bush can be used together in one operation in the respective bearing bracket from above.
  • the pressure lever 13 is expediently installed after the punch 10 has been inserted.
  • FIG. 13 shows an alternative embodiment to the embodiment according to FIGS. 9, 10 and 12, the same parts as in FIGS. 1 to 12 being provided with the same reference numbers.
  • the guide bushing 18, the spring 12, the locking ring 14 are already pre-assembled on the punch 10.
  • the washer 52 is designed as a separate part with a central guide bore 53 for the punch 10.
  • the washer On its side facing the wall 4, the washer has a shoulder 54 including the bore 53 on which is frustoconical, the smaller end face of the truncated cone facing the wall 4.
  • the annular disc On the side opposite the shoulder 54, the annular disc has a cylindrical extension 55, which also includes the bore 53.
  • the outer diameter of this approach is dimensioned such that it is somewhat larger than the inner diameter of the spring, so that the spring in the illustrated, pushed onto the extension 55 sits clamped thereon, whereby the spring 10 and approach 54 are positively and non-positively connected.
  • the unit formed in this way is self-centered by the conical extension 53 in the guide hole 9, because the outer diameter of the guide projection in the region of its free end surface is smaller than the hole diameter and increases continuously upwards to a dimension which corresponds at least to the hole diameter.
  • the guide bushing is designed such that only one punch is guided in it.

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)
EP83103319A 1983-04-05 1983-04-05 Perforateur manuel pour papier Ceased EP0121580A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP83103319A EP0121580A1 (fr) 1983-04-05 1983-04-05 Perforateur manuel pour papier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83103319A EP0121580A1 (fr) 1983-04-05 1983-04-05 Perforateur manuel pour papier

Publications (1)

Publication Number Publication Date
EP0121580A1 true EP0121580A1 (fr) 1984-10-17

Family

ID=8190394

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83103319A Ceased EP0121580A1 (fr) 1983-04-05 1983-04-05 Perforateur manuel pour papier

Country Status (1)

Country Link
EP (1) EP0121580A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0226363A2 (fr) * 1985-12-07 1987-06-24 Velos-Perforex Limited Perforateur
EP1332845A2 (fr) * 2002-01-31 2003-08-06 Acco UK Limited Perforateur
EP1332847A2 (fr) * 2002-01-31 2003-08-06 Acco UK Limited Perforateur avec un indicateur d'engagement des feuilles
WO2003076144A1 (fr) * 2002-03-08 2003-09-18 Ctech Ag Appareil a main se presentant sous forme de perforatrice

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481883A (en) * 1947-09-24 1949-09-13 Metal Specialties Mfg Co Punch apparatus
FR955676A (fr) * 1950-01-18
US2616733A (en) * 1948-08-09 1952-11-04 Tinnerman Products Inc Fastening device
GB707819A (en) * 1951-06-29 1954-04-21 Philidas Ltd Improvements in or relating to nuts of the self-locking or "stiff" type
FR1306129A (fr) * 1961-09-01 1962-10-13 Pince pour le découpage d'une encoche de repérage sur le bord d'une monture de vue transparente
US3387526A (en) * 1966-06-09 1968-06-11 Hildaur L. Neilsen Paper-punching device with selectively disposable punches
DE1536703A1 (de) * 1966-10-29 1970-02-26 Soennecken Fa F Papierlocher

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR955676A (fr) * 1950-01-18
US2481883A (en) * 1947-09-24 1949-09-13 Metal Specialties Mfg Co Punch apparatus
US2616733A (en) * 1948-08-09 1952-11-04 Tinnerman Products Inc Fastening device
GB707819A (en) * 1951-06-29 1954-04-21 Philidas Ltd Improvements in or relating to nuts of the self-locking or "stiff" type
FR1306129A (fr) * 1961-09-01 1962-10-13 Pince pour le découpage d'une encoche de repérage sur le bord d'une monture de vue transparente
US3387526A (en) * 1966-06-09 1968-06-11 Hildaur L. Neilsen Paper-punching device with selectively disposable punches
DE1536703A1 (de) * 1966-10-29 1970-02-26 Soennecken Fa F Papierlocher

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0226363A2 (fr) * 1985-12-07 1987-06-24 Velos-Perforex Limited Perforateur
EP0226363A3 (en) * 1985-12-07 1988-06-01 Perforex Limited Punch
EP1332845A2 (fr) * 2002-01-31 2003-08-06 Acco UK Limited Perforateur
GB2384738A (en) * 2002-01-31 2003-08-06 Acco Uk Ltd Improvements in or relating to hole punches
EP1332847A2 (fr) * 2002-01-31 2003-08-06 Acco UK Limited Perforateur avec un indicateur d'engagement des feuilles
EP1332845A3 (fr) * 2002-01-31 2004-01-14 Acco UK Limited Perforateur
EP1332847A3 (fr) * 2002-01-31 2004-02-18 Acco UK Limited Perforateur avec un indicateur d'engagement des feuilles
GB2384738B (en) * 2002-01-31 2005-02-23 Acco Uk Ltd Improvements in or relating to hole punches
WO2003076144A1 (fr) * 2002-03-08 2003-09-18 Ctech Ag Appareil a main se presentant sous forme de perforatrice

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19861020

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Inventor name: HOFFMANN, VOLKER

Inventor name: BOEHM, ADOLF