EP1277551B1 - Retaining plate for the blades of a bolt cutter - Google Patents

Retaining plate for the blades of a bolt cutter Download PDF

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Publication number
EP1277551B1
EP1277551B1 EP20010420166 EP01420166A EP1277551B1 EP 1277551 B1 EP1277551 B1 EP 1277551B1 EP 20010420166 EP20010420166 EP 20010420166 EP 01420166 A EP01420166 A EP 01420166A EP 1277551 B1 EP1277551 B1 EP 1277551B1
Authority
EP
European Patent Office
Prior art keywords
axis
blades
plate
bolt cutter
plates
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
EP20010420166
Other languages
German (de)
French (fr)
Other versions
EP1277551A1 (en
Inventor
André Bourrat
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.)
SAM Outillage SAS
Original Assignee
SAM Outillage SAS
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 SAM Outillage SAS filed Critical SAM Outillage SAS
Priority to DE2001602814 priority Critical patent/DE60102814T2/en
Priority to EP20010420166 priority patent/EP1277551B1/en
Priority to ES01420166T priority patent/ES2217102T3/en
Publication of EP1277551A1 publication Critical patent/EP1277551A1/en
Application granted granted Critical
Publication of EP1277551B1 publication Critical patent/EP1277551B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B17/00—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact
    • B26B17/02—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact with jaws operated indirectly by the handles, e.g. through cams or toggle levers

Definitions

  • the invention relates to a blade holding plate for bolt cutter (see eg US-A-5014432).
  • each axis 4a, 4b is constituted by a stepped axis the rod of which passes through cylindrical punches formed in the blades and in each of the maintenance plates 3a, 3b.
  • the free end of each axis is riveted on one of the plates by deformation, hot or cold, of its free end.
  • the movements of the blades causes, by friction, the rotation of the axes 4a, 4b, which leads to wear of these pins and the punches receiving them, and, consequently, to the formation of radial clearances.
  • the blades are less and less held by their plates 3a, 3b and can therefore shift one with respect to the other, thus shifting their cutting edges on both sides of the sectioning plane, which favors the tilting of the bolt cutter providing poor sectioning by shearing of the part.
  • the object of the present invention is to remedy these disadvantages.
  • each of the two punchings of the blade holding plate against which the ends of axes are riveted has at least one groove longitudinal circumscribed to the cylindrical envelope necessary for the passage of the axis and able, when riveting the axis, to receive part of the material this axis to form a means of setting in rotation thereof.
  • the groove is made on the side of the punching which adjoins the other punching made in the same plate.
  • the means of setting in rotation of each axis are diametrically opposite to the part of the axis receiving the reaction force during the sectioning of a part, and, consequently, are subjected to an effort of much more limited matting.
  • the head A of the bolt cutter is equipped with two identical holding plates.
  • each of the punches 6, for the passage of the axis 4b or 4a corresponding present, as shown in more detail in Figure 3, at least a groove 5 and in this case three grooves extending over all the thickness of each plate.
  • Figure 3 clearly shows that the grooves 5 are circumscribed to the cylindrical envelope necessary for the passage of the axis 4a or corresponding 4b, i.e. are outside of this envelope for allow free passage of the axis.
  • Figure 2 shows that, preferably, the grooves 5 are made on the edge of each punching facing inward, i.e. on the edge which adjoins the edge of the other punching, so that these grooves are diametrically opposite to the punching area receiving the force of reaction to the cut.
  • each end of each axis 4a, 4b is riveted and therefore comprises, locally, lugs 8 cooperating with grooves 5 arranged in each of the plates 3a, 3b, but it is obvious that the timing of each axis can be ensured by a arrangement of the punches 6 of only one of the plates 3a, 3b.
  • the splines can have any cross section, be single or multiple, provided they are circumscribed to the cylinder necessary for the passage of the axis and that they allow the formation of a lug radial 8 having a cross section sufficient to ensure the setting in rotation of the axis relative to the plate it crosses.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)

Description

L'invention est relative à une plaque de maintien des lames pour coupe boulon (voir p.ex. US-A-5014432).The invention relates to a blade holding plate for bolt cutter (see eg US-A-5014432).

Elle concerne plus spécialement les coupe boulons composés, comme montré figure 1 annexée, d'une tête A avec deux lames 2a, 2b, disposées entre deux plaques 3a, 3b sur lesquelles elles sont articulées par des axes transversaux 4a, 4b, de moyens B multiplicateurs d'efforts et de deux bras de manoeuvre C1, C2.It relates more specifically to compound bolt cutters, as shown in attached FIG. 1, of a head A with two blades 2a, 2b, disposed between two plates 3a, 3b on which they are articulated by transverse axes 4a, 4b, of means B multiplying forces and two operating arm C1, C2.

Actuellement, chaque axe 4a, 4b est constitué par un axe épaulé dont la tige traverse des poinçonnages cylindriques ménagés dans les lames et dans chacune des plaques de maitien 3a, 3b. L'extrémité libre de chaque axe est rivée sur l'une des plaques par déformation, à chaud ou à froid, de son extrémité libre.Currently, each axis 4a, 4b is constituted by a stepped axis the rod of which passes through cylindrical punches formed in the blades and in each of the maintenance plates 3a, 3b. The free end of each axis is riveted on one of the plates by deformation, hot or cold, of its free end.

Lorsqu'un tel coupe boulon est utilisé, les mouvements des lames entraíne, par frottement, la mise en rotation des axes 4a, 4b, ce qui conduit à une usure de ces axes et des poinçonnages les recevant, et, en conséquence, à la formation de jeux radiaux. Il en résulte que, dans le temps, les lames sont de moins en moins tenues par leurs plaques 3a, 3b et peuvent donc se décaler l'une par rapport à l'autre, en décalant ainsi leurs tranchants de part et d'autre du plan de sectionnement, ce qui favorise le basculement du coupe boulon procurant un mauvais sectionnement par cisaillement de la pièce.When such a bolt cutter is used, the movements of the blades causes, by friction, the rotation of the axes 4a, 4b, which leads to wear of these pins and the punches receiving them, and, consequently, to the formation of radial clearances. As a result, over time, the blades are less and less held by their plates 3a, 3b and can therefore shift one with respect to the other, thus shifting their cutting edges on both sides of the sectioning plane, which favors the tilting of the bolt cutter providing poor sectioning by shearing of the part.

La présente invention a pour objet de remédier à ces inconvénients.The object of the present invention is to remedy these disadvantages.

A cet effet, dans le coupe boulon selon l'invention, chacun des deux poinçonnages de la plaque de maintien des lames contre laquelle les extrémités des axes sont rivées, comporte au moins une cannelure longitudinale circonscrite à l'enveloppe cylindrique nécessaire au passage de l'axe et apte, lors du rivetage de l'axe, à accueillir une partie de la matière de cet axe pour former un moyen de calage en rotation de celui-ci.To this end, in the bolt cutter according to the invention, each of the two punchings of the blade holding plate against which the ends of axes are riveted, has at least one groove longitudinal circumscribed to the cylindrical envelope necessary for the passage of the axis and able, when riveting the axis, to receive part of the material this axis to form a means of setting in rotation thereof.

Ainsi, lorsque le coupe boulon est utilisé, le couple de rotation communiqué à la lame ne se transmet pas aux axes, ce qui supprime tout risque d'usure de ces axes et des poinçonnages ménagés dans les plaques de maintien des lames, et en conséquence, tous risque de basculement du coupe boulon.So when the bolt cutter is used, the torque communicated to the blade is not transmitted to the axes, which removes all risk of wear of these pins and of the punches made in the plates blade maintenance, and consequently, all risk of tipping of the cut bolt.

De préférence, la cannelure est réalisée sur le côté du poinçonnage qui jouxte l'autre poinçonnage réalisé dans la même plaque. Preferably, the groove is made on the side of the punching which adjoins the other punching made in the same plate.

Grâce à cela, les moyens de calage en rotation de chaque axe sont diamétralement opposés à la partie de l'axe recevant l'effort de réaction lors du sectionnement d'une pièce, et, en conséquence, sont soumis à un effort de matage beaucoup plus limité.Thanks to this, the means of setting in rotation of each axis are diametrically opposite to the part of the axis receiving the reaction force during the sectioning of a part, and, consequently, are subjected to an effort of much more limited matting.

L'invention sera mieux comprise à l'aide de la description qui suit en référence au dessin schématique annexé.

  • Figure 1 est une vue en perspective représentant, de manière générale, un coupe boulon,
  • Figure 2 est une vue en perspective de la tête d'un coupe boulon selon l'invention,
  • Figure 3 est une vue partielle en plan par-dessus du poinçonnage réalisé dans une plaque de maintien,
  • Figure 4 est une vue partielle en coupe longitudinale passant par un axe de la tête du coupe boulon représenté à la figure 2,
  • Figure 5 est une vue partielle, à échelle agrandie, montrant le détail référencé 5 à la figure 4.
    • The invention will be better understood with the aid of the description which follows with reference to the appended schematic drawing.
  • FIG. 1 is a perspective view representing, in general, a bolt cutter,
  • FIG. 2 is a perspective view of the head of a bolt cutter according to the invention,
  • FIG. 3 is a partial plan view over the punching produced in a holding plate,
  • FIG. 4 is a partial view in longitudinal section passing through an axis of the head of the bolt cutter shown in FIG. 2,
  • Figure 5 is a partial view, on an enlarged scale, showing the detail referenced 5 in Figure 4.

    • Dans la forme d'exécution représentée aux figures 2 à 5, la tête A du coupe boulon est équipée de deux plaques de maintien identiques. Dans chacune d'elles chacun des poinçonnages 6, pour le passage de l'axe 4b ou 4a correspondant, présente, comme montré plus en détails à la figure 3, au moins une cannelure 5 et en l'occurrence trois cannelures s'étendant sur toute l'épaisseur de chaque plaque. La figure 3 montre bien que les cannelures 5 sont circonscrites à l'enveloppe cylindrique nécessaire au passage de l'axe 4a ou 4b correspondant, c'est-à-dire sont à l'extérieur de cette enveloppe pour permettre le libre passage de l'axe.In the embodiment shown in Figures 2 to 5, the head A of the bolt cutter is equipped with two identical holding plates. In each of them each of the punches 6, for the passage of the axis 4b or 4a corresponding, present, as shown in more detail in Figure 3, at least a groove 5 and in this case three grooves extending over all the thickness of each plate. Figure 3 clearly shows that the grooves 5 are circumscribed to the cylindrical envelope necessary for the passage of the axis 4a or corresponding 4b, i.e. are outside of this envelope for allow free passage of the axis.

    Grâce à cet agencement, lorsque l'extrémité correspondante de l'axe est rivetée, c'est-à-dire est soumise à un effort vertical écrasant son extrémité dépassant de la plaque 3a, 3b correspondante, la matière constitutive de cette extrémité, qui flue pour former un bourrelet 7 sur la face externe de la plaque correspondante, s'insinue également dans la partie voisine des cannelures 5 en formant, comme montré à la figure 5, des ergots 8. Ces ergots assurent le calage en rotation de l'extrémité de l'axe par rapport à la plaque 3a, 3b correspondante, mais sont sans effet sur la fonction de l'axe. En effet, ne s'étendant pas sur toute la hauteur de la plaque, ils ne gênent en rien l'articulation de la lame correspondante 2a, 2b autour de la partie centrale de l'axe. Thanks to this arrangement, when the corresponding end of the axis is riveted, that is to say is subjected to a vertical force crushing its end protruding from the corresponding plate 3a, 3b, the material constituting this end, which flows to form a bead 7 on the face outer of the corresponding plate, also creeps into the part adjacent to the grooves 5, forming, as shown in FIG. 5, lugs 8. These pins ensure the rotation setting of the end of the axis relative to the corresponding plate 3a, 3b, but have no effect on the function of the axis. Indeed, not extending over the entire height of the plate, they do not hinder nothing the articulation of the corresponding blade 2a, 2b around the central part of the axis.

    La figure 2 montre que, de préférence, les cannelures 5 sont réalisées sur le bord de chaque poinçonnage tourné vers l'intérieur, c'est-à-dire sur le bord qui jouxte le bord de l'autre poinçonnage, afin que ces cannelures soient diamétralement opposées à la zone du poinçonnage recevant l'effort de réaction à la coupe.Figure 2 shows that, preferably, the grooves 5 are made on the edge of each punching facing inward, i.e. on the edge which adjoins the edge of the other punching, so that these grooves are diametrically opposite to the punching area receiving the force of reaction to the cut.

    Dans la forme d'exécution représentée, chacune des extrémités de chaque axe 4a, 4b est rivetée et comporte donc, localement, des ergots 8 coopérant avec des cannelures 5 aménagées dans chacune des plaques 3a, 3b, mais il est évident que le calage de chaque axe peut être assuré par un aménagement des poinçonnages 6 de seulement l'une des plaques 3a, 3b.In the embodiment shown, each end of each axis 4a, 4b is riveted and therefore comprises, locally, lugs 8 cooperating with grooves 5 arranged in each of the plates 3a, 3b, but it is obvious that the timing of each axis can be ensured by a arrangement of the punches 6 of only one of the plates 3a, 3b.

    Les cannelures peuvent présenter toute section transversale, être uniques ou multiples, pourvu qu'elles soient circonscrites au cylindre nécessaire au passage de l'axe et qu'elles permettent la formation d'un ergot radial 8 ayant une section suffisante pour assurer le calage en rotation de l'axe par rapport à la plaque qu'il traverse.The splines can have any cross section, be single or multiple, provided they are circumscribed to the cylinder necessary for the passage of the axis and that they allow the formation of a lug radial 8 having a cross section sufficient to ensure the setting in rotation of the axis relative to the plate it crosses.

    Claims (2)

    1. Plate for retention of the blades of a bolt cutter, wherein the cutting blades (2a, 2b) are disposed between two plates (3a, 3b) on which they are articulated by shafts (4a, 4b) which pass through punched holes (6) in these plates, each articulation shaft (4a, 4b) being wedged in axial translation, at least on one side, by riveting, characterised in that each of the two punched holes (6) in the retention plate (3a) against which the ends of the shafts (4a, 4b) are riveted, comprises at least one longitudinal groove (5) circumscribed on the cylindrical envelope, which is necessary for passage of the shaft (4a or 4b), and which, during riveting, can accommodate part of the material of this shaft in order to form a means (8) for wedging of the latter in rotation.
    2. Plate according to claim 1, characterised in that the groove (5) is provided on the side of the punched hole (6) which is contiguous to the other punched hole provided in the same plate (3a, 3b).
    EP20010420166 2001-07-20 2001-07-20 Retaining plate for the blades of a bolt cutter Expired - Lifetime EP1277551B1 (en)

    Priority Applications (3)

    Application Number Priority Date Filing Date Title
    DE2001602814 DE60102814T2 (en) 2001-07-20 2001-07-20 Mounting plate for the blades of a bolt cutter
    EP20010420166 EP1277551B1 (en) 2001-07-20 2001-07-20 Retaining plate for the blades of a bolt cutter
    ES01420166T ES2217102T3 (en) 2001-07-20 2001-07-20 PLATE FOR HOLDING SHEETS OF A SHORT-BOLTS.

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP20010420166 EP1277551B1 (en) 2001-07-20 2001-07-20 Retaining plate for the blades of a bolt cutter

    Publications (2)

    Publication Number Publication Date
    EP1277551A1 EP1277551A1 (en) 2003-01-22
    EP1277551B1 true EP1277551B1 (en) 2004-04-14

    Family

    ID=8183153

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP20010420166 Expired - Lifetime EP1277551B1 (en) 2001-07-20 2001-07-20 Retaining plate for the blades of a bolt cutter

    Country Status (3)

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    EP (1) EP1277551B1 (en)
    DE (1) DE60102814T2 (en)
    ES (1) ES2217102T3 (en)

    Families Citing this family (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102014112150A1 (en) * 2014-08-26 2016-03-03 Mytools Enterprise Co., Ltd. Energy-saving cutting pliers with bevelled cutting edges

    Family Cites Families (4)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2090259A (en) * 1936-06-22 1937-08-17 Porter Inc H K Tool
    DE8713214U1 (en) * 1987-10-01 1989-01-26 Zangenmann, Carl Aug. Zimmermann, 5630 Remscheid, De
    DE8803016U1 (en) * 1988-03-05 1989-07-06 Knipex-Werk C. Gustav Putsch, 5600 Wuppertal, De
    FR2809036B1 (en) * 2000-05-18 2002-08-23 Sam Outil BLADE HOLDING PLATE

    Also Published As

    Publication number Publication date
    ES2217102T3 (en) 2004-11-01
    DE60102814D1 (en) 2004-05-19
    EP1277551A1 (en) 2003-01-22
    DE60102814T2 (en) 2005-04-21

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