EP0055332B1 - Châssis pour poinçonneuse - Google Patents

Châssis pour poinçonneuse Download PDF

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Publication number
EP0055332B1
EP0055332B1 EP19810107691 EP81107691A EP0055332B1 EP 0055332 B1 EP0055332 B1 EP 0055332B1 EP 19810107691 EP19810107691 EP 19810107691 EP 81107691 A EP81107691 A EP 81107691A EP 0055332 B1 EP0055332 B1 EP 0055332B1
Authority
EP
European Patent Office
Prior art keywords
dish
base plate
cheeks
pressed
paper punch
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
Application number
EP19810107691
Other languages
German (de)
English (en)
Other versions
EP0055332A1 (fr
Inventor
Theodor Pflugfelder
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
Publication of EP0055332A1 publication Critical patent/EP0055332A1/fr
Application granted granted Critical
Publication of EP0055332B1 publication Critical patent/EP0055332B1/fr
Expired 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
    • 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

Definitions

  • the invention relates to a letter punch lower part of the type specified in the preamble of claim 1.
  • the longitudinal base surfaces of the base plate delimited by the lateral bending edges of the pressed-up parts and the bending edges of the side cheeks, are formed at acute angles at the points delimiting the depth of the insertion slot, so that the side cheeks at the rear boundary of the insertion slot directly reach the flank of the pushed-up tub. This is to prevent the base plate or the tub flanks from being deformed at this point when the letter hole is subjected to great stress.
  • the bending edges of the side cheeks and the lateral bending edges of the pressed-up tub parts are at a greater or lesser distance from one another, forming flat standing surfaces. It has been shown that bending moments occur in this intermediate area in the case of larger punch loads which pull and deform the flat parts of the base surface depending on the point of application of the tensile forces occurring on the side of the tub flanks or the side cheeks. These deformations can lead to an undesirable widening of the insertion slot and to changes in position in the area of the punch guides.
  • the invention is therefore based on the object to improve the known letter punch lower part in such a way that deformations in the area of the standing surfaces are avoided even under high tensile loads.
  • the sidewalls are bent up at the relevant positions directly at the tub edge, including an acute angle, so that at the The tensile forces acting on the sidewalls can be transmitted directly to the steep, almost vertical tub flank without bending moment.
  • bores 9, 9' are provided which serve as a bearing point for a pressure plate, not shown.
  • the raised pan tapers in the area of the fields 22 and 23, so that the lower edge edges 24, 24 ', which run obliquely outwards in their front area, form acute angles with the dash-dotted bending lines 25, 25'.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Punching Or Piercing (AREA)

Claims (2)

1. Partie inférieure de perforateur pour lettres constituée par une plaque de base (2) en forme d'auge, qui porte une matrice de coupe et présente sur ses bords des surfaces servant de supports et des joues latérales (4, 4'), pliées à angle droit vers le haut, sur lesquelles peut être montée à pivotement une plaque de pression agissant sur des poinçons de perforation, deux oreilles (6, 6') pliées vers l'intérieur portant des guidages (8, 8') pour poinçons de perforation étant disposées sur lesdites joues ; la marche formant la matrice de coupe étant constituée par la partie marginale avant (21), estampée vers le haut en forme d'auge, tandis qu'une région adjacente plus étroite (23), estampée vers le haut sur l'arrière, est entourée par les régions marginales de la plaque de fond (2), qui forment les surfaces- supports du perforateur pour lettres, les joues latérales (4, 4') du perforateur étant pliées vers le haut à partir des deux surfaces d'appui longitudinales de la plaque de base (2) et les arêtes de pliage des joues latérales, dans les régions qui limitent la profondeur d'une fente d'introduction des documents à perforer, s'étendant directement jusqu'aux arêtes de pliage latérales (24, 24') des régions de l'auge qui ont été estampées vers le haut, caractérisée en ce que les arêtes de pliage (25, 25' ; 24, 24') qui limitent les surfaces- supports longitudinales et appartiennent aux joues latérales (4, 4') et aux parties estampées vers le haut (22, 23) coïncident sur une partie de leur longueur, depuis la région (A) qui limite la profondeur de la fente d'introduction jusqu'à la partie arrière (23) de l'auge.
2. Partie inférieure de perforateur pour lettres selon la revendication 1, caractérisée en ce que les arêtes de pliage (24, 24' ; 25, 25') coïncident sur une partie de leur longueur dans la région arrière (B) de la partie arrière (23) de l'auge.
EP19810107691 1980-12-27 1981-09-28 Châssis pour poinçonneuse Expired EP0055332B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803049249 DE3049249C2 (de) 1980-12-27 1980-12-27 Brieflocher-Unterteil
DE3049249 1980-12-27

Publications (2)

Publication Number Publication Date
EP0055332A1 EP0055332A1 (fr) 1982-07-07
EP0055332B1 true EP0055332B1 (fr) 1984-01-18

Family

ID=6120428

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810107691 Expired EP0055332B1 (fr) 1980-12-27 1981-09-28 Châssis pour poinçonneuse

Country Status (2)

Country Link
EP (1) EP0055332B1 (fr)
DE (1) DE3049249C2 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2646135C3 (de) * 1976-10-13 1980-09-25 Fa. Louis Leitz, 7000 Stuttgart Brieflocher-Unterteil
DE2646778C3 (de) * 1976-10-16 1981-01-08 Fa. Louis Leitz, 7000 Stuttgart Brieflocher

Also Published As

Publication number Publication date
EP0055332A1 (fr) 1982-07-07
DE3049249C2 (de) 1985-05-09
DE3049249A1 (de) 1982-07-29

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