EP0442004A1 - Couteau à lames interchangeables - Google Patents

Couteau à lames interchangeables Download PDF

Info

Publication number
EP0442004A1
EP0442004A1 EP90102850A EP90102850A EP0442004A1 EP 0442004 A1 EP0442004 A1 EP 0442004A1 EP 90102850 A EP90102850 A EP 90102850A EP 90102850 A EP90102850 A EP 90102850A EP 0442004 A1 EP0442004 A1 EP 0442004A1
Authority
EP
European Patent Office
Prior art keywords
slide
knife
holder
housing
blade
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
Application number
EP90102850A
Other languages
German (de)
English (en)
Other versions
EP0442004B1 (fr
Inventor
Gerd Fierus
Udo Fierus
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.)
Hazet Werk Hermann Zerver GmbH and Co KG
Original Assignee
Hazet Werk Hermann Zerver GmbH and Co KG
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 Hazet Werk Hermann Zerver GmbH and Co KG filed Critical Hazet Werk Hermann Zerver GmbH and Co KG
Priority to AT90102850T priority Critical patent/ATE103525T1/de
Priority to ES90102850T priority patent/ES2052987T3/es
Priority to DK90102850.6T priority patent/DK0442004T3/da
Priority to DE90102850T priority patent/DE59005203D1/de
Priority to EP90102850A priority patent/EP0442004B1/fr
Publication of EP0442004A1 publication Critical patent/EP0442004A1/fr
Application granted granted Critical
Publication of EP0442004B1 publication Critical patent/EP0442004B1/fr
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
    • B26B5/00—Hand knives with one or more detachable blades
    • B26B5/001—Hand knives with one or more detachable blades with blades being slid out of handle immediately prior to use

Definitions

  • the invention relates to a knife for interchangeable knife blades with a housing and a longitudinally displaceably guided slide in the housing, which can be fixed at predetermined intervals of a detent formed on the housing and on which the knife blade is held interchangeably by means of a pin engaging in a hole in the knife blade.
  • Knives of this type are known in various designs. They are used as so-called technical knives in various craft work, for example when laying carpets. In addition to trapezoidal carpet knife blades that are designed with either a smooth or hook-shaped cutting edge, so-called snap-off blades are also used. Knife blades of this type are divided into several sections by predetermined breaking lines; as soon as the cutting edge of the respective front section has become blunt, the front section is broken off, so that a new section of the snap-off blade with a sharp cutting edge is then available for the work ahead.
  • the known knife blades are not only designed differently with regard to their respective purpose, but also are also held in different ways on the slide which is longitudinally displaceable in the knife housing.
  • many of the known knife blades are provided with a hole which can be placed on a pin of the respective slide for holding the knife blade.
  • the knife blades most commonly used in practice differ not only in their strength and width and length, but also in the position and diameter of the hole provided for mounting the knife blade on the slide. For this reason, despite a certain standardization, it is necessary to use different knife housings for different knife blades.
  • the invention has for its object to provide a knife for interchangeable knife blades described above, which can be used universally for most of the commercially available blades, despite the differences of such knife blades in terms of length, width, thickness and hole formation.
  • the solution to this problem by the invention is characterized in that the respective knife blade is held on the slide by means of a holder which is provided with a pin corresponding to the hole of the respective knife blade and is interchangeably mounted on the slide.
  • This inventive use and design of a holder mounted on the slide makes it possible to make the knife usable for a wide variety of knife blades on the market while keeping the slide and only by exchanging the holder.
  • the different holders each have a pin which is adapted to the hole of the knife blade to be used in each case. It is possible to replace these colders according to the invention in a simple manner.
  • the holder in order to simplify the adaptation of the knife according to the invention to different knife blades, it is proposed according to a further feature of the invention to design the holder as a reversible holder, which can be rotated by 180 ° on the slide and is provided with a pin at each end, the diameter of which corresponds to the different commercially available knife blades are of different sizes.
  • a turning holder mounted on the slide for holding the exchangeable knife blades has the advantage that the same knife housing can be used for different commercially available knife blades, for example for carpet knife blades and snap-off blades, whose width is between 18 and 19 mm and their thickness is between 0.5 and 0.65 mm varies and which, apart from a different length, have holes of either 5.2 or 7.1 mm in order to be fixed on the slide of the knife.
  • the respective knife blade is reliably fixed both on the slide and in the guide channel of the knife housing, because the turning holder can be rotated through 180 °, whereby not only one for the correct determination of the knife blade to be used in each case Pin with the correct diameter is available, but also the distance of the knife back to the knife guide channel formed in the knife housing is determined such that the back of the respective knife blade lies reliably against the guide channel.
  • the proposal according to the invention thus creates a universally usable technical knife for using differently designed knife blades.
  • the holder or reversing holder is provided at the end with a transverse web, the guide surfaces of which extend parallel to the longitudinal extension and bear against the corresponding guide surfaces of the blade channel, so that they rest against their knife blade guided in the front slot in the front slot of the housing is also reliably guided in the blade channel in the region of its attachment to the slide, because the guide surfaces formed on the crossbars are guided in the blade channel so that they cannot tip over or twist.
  • the holder or reversing holder is provided with a bearing journal with which it is positioned in a corresponding bearing bore in the slide.
  • the holder or turning holder on the slide can be further fixed in that it is secured against rotation by longitudinal guide webs on the slide.
  • the slide is provided on its underside with at least one latching cam, which engages in a detent formed on the housing relative to the underside of the slider, from which the latching cam can emerge due to the elasticity of the slide and on which the latching cam can be by means of a Locking member can be fixed.
  • a positive locking of the slide on the knife housing which can only be released consciously and not accidentally; in the known spring catches, which require an additional spring element, which can get lost or break, an unintentional actuation is not excluded, so that, in contrast to the knife according to the invention, an unwanted release of the knife blade lock can occur.
  • Training such an incorrect operation is excluded by a positive locking of the slide on the housing, so that the knife according to the invention can also be used for saw blades which are loaded in the pulling and pushing directions.
  • the locking member is formed by a rotatably mounted toggle toggle which engages under the detent in the locking position and thus prevents the detent cam from escaping due to the elasticity of the slider and which is dimensioned in the release position such that there is no underhand grip.
  • the detent is arranged on the broad side of the knife housing and thus not in the pressure area of the knife, which is constantly loaded by the thumb or handball when in use. This also prevents incorrect actuation of the knife lock and thus unconscious triggering.
  • the toggle is formed with a cylindrical middle piece, with which the toggle can be inserted into a slot in the slide provided with circular bearing points. This results in a particularly simple and therefore inexpensive design and storage of the toggle on the slide.
  • two mutually opposite detents are provided according to the invention.
  • an additional channel for storing reserve knife blades is formed in the housing parallel to the blade channel, a larger number can also be different Knife blades can be reliably stored in the knife.
  • the invention proposes to close the housing at its end facing away from the front slot by a cap which closes both the blade channel and the additional channel.
  • the knife shown in Figures 1 to 4 in different views consists of a knife blade M housing 1, which is provided at its front end with a front slot 2 as an outlet for the front end of the knife blade M and at its rear end with a cap 3 is.
  • a slide 4 is guided in a longitudinally displaceable manner and can be locked in various positions by means of a toggle 5, which is rotatably mounted on the slide 4 as a locking member, which are predetermined by a detent 6 formed on the housing 1.
  • the slide 4 is displaceably guided in a guide channel 7 running in the longitudinal direction of the housing 1.
  • This guide channel 7 can be seen in Figures 2 and 5 in plan view and in Figure 7 in cross section.
  • Figures 8 to 12 show the slide 4 in different views and in cross section.
  • the slide 4 is provided on its underside with two latching cams 8 which are formed in one piece on a fork-shaped part of the slide 4, this fork-shaped part of the slide 4 being designed to be resilient with respect to the main slide part, which in the exemplary embodiment is a transverse one Material weakening 9 is provided.
  • the material weakening 9 causes the locking cams 8 to emerge resiliently from the recesses of the locking 6 when the slide 4 moves longitudinally relative to the housing 1, so that the slide 4 can be moved in the longitudinal direction of the housing 1.
  • a locking member in the form of a toggle 5 is provided.
  • This gag 5 is shown as an individual part in FIGS. 19, 20 and 21.
  • the toggle 5 comprises a cylindrical middle piece 10 with which it is rotatably mounted in circular bearing points 11 of the slide 4, these circular segment shaped bearing points 11 being formed in a slot 12 of that part of the slide 4 which has the locking cams 8 .
  • the toggle 5 is provided with a handle 13 on the upper side.
  • the middle piece 10 On the underside, the middle piece 10 carries a locking part 14; This locking part 14 has different dimensions in the longitudinal and transverse directions, so that the locking part 14 engages under the two catches 6 in the locking position according to FIG. 18, whereas it is dimensioned in its release position rotated by 90 ° in such a way that there is no under-grip.
  • the slide 4 is provided with a bearing bore 15 into which a bearing pin 16 of a turning holder 17c engages, which is thus rotatably mounted on the slide 4.
  • This turning holder 17c is provided on the underside facing away from the bearing pin 16 with two pins 18 and 19 with different diameters.
  • These pins 18 and 19 each serve to receive a hole which is formed in the knife blade M to be used in each case.
  • the pin 18 has a diameter of 7.1 and the pin 19 has a diameter of 5.2 mm, so that different knife blades M can be held on the turning holder 17c, depending on which of the pins 18 and 19 has been brought into the receiving position .
  • the guide surfaces 21 of which run parallel to the longitudinal extension of the turning holder 17c are guided in the blade channel 22 of the housing 1, which can best be seen in FIG .
  • this blade channel there is also the knife blade M, which is held with its hole, which cannot be seen in the drawing, on one of the two pins 18 or 19 of the turning holder 17c.
  • the turning holder 17c is further fixed in its respective end position on the slide 4 by longitudinal guide webs 23 which are formed on the slide 4 and between which the turning holder 17c is held non-rotatably.
  • These guide webs 23 can be seen in FIGS. 8 to 12.
  • an additional channel 24 is formed in the housing 1 parallel to the guide channel 7 for the slide 4 and to the blade channel 22 and can be used for storing spare blades.
  • This additional channel 24 is closed together with the guide channel 7 and blade channel 22 by the closure cap 3 which can be placed on the rear end of the housing 1.
  • the closure cap 3 is first removed. Subsequently, the gag 5 is rotated by means of its handle 13 such that the underhand grip of the locking part 14 is released under the catch 6.
  • the gripping piece 13 standing transversely in FIGS. 2 and 5 is rotated by 90 ° in this case and extends with its main extent parallel to the longitudinal direction of the housing 1.
  • the slide 4 can be pushed back out of the housing 1, since the two locking cams 8 can spring out of the recesses of the detents 6 due to the elasticity of the slide part carrying them. In this way, the slide 4 can be removed from the housing 1 together with the toggle 5 and the turning holder 17c. Outside the housing 1, a knife blade M possibly held on the turning holder 17c can be removed from the turning holder 17c.
  • the knife blade M now to be used is placed with its hole on one of the two pins 18 or 19 of the turning holder 17c, specifically on the pin 18 or 19 lying in front. If the diameter of the pin 18 or 19 lying in front is not with the hole of the knife blade M to be used, the turning holder 17c with its bearing pin 16 is slightly lifted out of the bearing bore 15 of the slide 4, so that it is outside the guide webs 23 formed on the slide 4. In this position, the turning holder 17c can be rotated through 180 °, so that the pin 18 or 19 required in each case is at the front.
  • the new knife blade M is now placed on these pins 18 and 19, respectively.
  • the blade with the slide 4, the toggle 5 and the turning holder 17c is then inserted into the housing 1, the knife blade M and the turning holder 17c being in the blade channel 22, whereas the slide 4 is essentially in the guide channel 7. Since the gag 5 with its locking part 14 does not engage under the catches 6, the slide 4 can be pushed into the housing 1 until the tip of the knife blade M emerges from the front slot 2 of the housing 1. In the desired position, the slide 4 is then locked with the knife blade M by turning the toggle 5 through 90 °.
  • Both the housing 1 and the slide 4 with toggle 5 and turning holder 17c are preferably made of a suitable one Made of plastic, as is the closure cap 3.
  • the housing 1 in the exemplary embodiment is provided with a hanging opening 25.
  • replaceable holders 17a and 17b can also be used on the slide 4, which are shown in a top view in FIGS. 22 and 23.
  • each of these holders 17a and 17b corresponds in each case to approximately half of the turning holder 17c described.
  • Each holder 17a or 17b has a pin 18 or 19.
  • the pin 18 to be seen in FIG. 22 has, for example, a diameter of 7.1 mm for receiving so-called carpet knife blades, whereas the holder 17b according to FIG. 23 carries a pin 19 which, with a diameter of 5.2 mm, determines the storage of so-called snap-off blades is.
  • Figures 22 to 26 show that the interchangeable holders 17a and 17b are each provided with a crosspiece 20 which is formed with guide surfaces 21 for guiding the holders 17a and 17b in the blade channel 22.
  • the holders 17a and 17b are also positioned in the bearing bore 15 of the slide 4 by means of a bearing pin 16 and secured against rotation relative to the slide 4 by the guide webs 23 on the slide 4.
  • the reversing holder 17c described first is suitable for receiving two different types of knife blades M and can be rotated through 180 ° if necessary, the colders 17a and 17b must be exchanged for another holder if a different type of knife blade M is in the knife should be used.
  • This handling is a bit more cumbersome, but allows the knife to be more commercially available for all types Knife blades M to be used, provided that these knife blades M are provided with a hole for receiving a pin 18 or l9. In this case, it is only necessary to provide a corresponding holder with a corresponding pin.
  • a turning holder 17c can also be used in the respective knife, for which it is only necessary to design the bearing pins 16 identically.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
EP90102850A 1990-02-14 1990-02-14 Couteau à lames interchangeables Expired - Lifetime EP0442004B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT90102850T ATE103525T1 (de) 1990-02-14 1990-02-14 Messer fuer auswechselbare messerklingen.
ES90102850T ES2052987T3 (es) 1990-02-14 1990-02-14 Cortador de cuchilla para hojas de cuchilla recambiables.
DK90102850.6T DK0442004T3 (da) 1990-02-14 1990-02-14 Kniv til udskiftelige klinger
DE90102850T DE59005203D1 (de) 1990-02-14 1990-02-14 Messer für auswechselbare Messerklingen.
EP90102850A EP0442004B1 (fr) 1990-02-14 1990-02-14 Couteau à lames interchangeables

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90102850A EP0442004B1 (fr) 1990-02-14 1990-02-14 Couteau à lames interchangeables

Publications (2)

Publication Number Publication Date
EP0442004A1 true EP0442004A1 (fr) 1991-08-21
EP0442004B1 EP0442004B1 (fr) 1994-03-30

Family

ID=8203648

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90102850A Expired - Lifetime EP0442004B1 (fr) 1990-02-14 1990-02-14 Couteau à lames interchangeables

Country Status (5)

Country Link
EP (1) EP0442004B1 (fr)
AT (1) ATE103525T1 (fr)
DE (1) DE59005203D1 (fr)
DK (1) DK0442004T3 (fr)
ES (1) ES2052987T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5997202A (en) * 1996-02-28 1999-12-07 Colgate-Palmolive Company Package for stick product
EP1100656A1 (fr) * 1998-07-31 2001-05-23 American Safety Razor Company Couteau universel a retraction automatique a ressort
EP1452656A2 (fr) * 2003-02-26 2004-09-01 Haniel Baustoff-Industrie Technologie-und Forschungs-GmbH Mur d'une pièce d'une construction

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1527205A (en) * 1976-04-17 1978-10-04 Martor Argentax Beermann Kg E Knife having a strip steel knife blade sub-divided into break-off portions
DE2902642A1 (de) * 1978-01-25 1979-07-26 Stanley Tools Ltd Messer mit zurueckziehbarer klinge
DE3121400A1 (de) * 1981-05-29 1982-12-23 Schlipköter, Michael Schneidwerkzeug mit auswechselbarer klinge

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1527205A (en) * 1976-04-17 1978-10-04 Martor Argentax Beermann Kg E Knife having a strip steel knife blade sub-divided into break-off portions
DE2902642A1 (de) * 1978-01-25 1979-07-26 Stanley Tools Ltd Messer mit zurueckziehbarer klinge
DE3121400A1 (de) * 1981-05-29 1982-12-23 Schlipköter, Michael Schneidwerkzeug mit auswechselbarer klinge

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5997202A (en) * 1996-02-28 1999-12-07 Colgate-Palmolive Company Package for stick product
EP1100656A1 (fr) * 1998-07-31 2001-05-23 American Safety Razor Company Couteau universel a retraction automatique a ressort
EP1100656A4 (fr) * 1998-07-31 2003-01-02 American Safety Razor Couteau universel a retraction automatique a ressort
EP1452656A2 (fr) * 2003-02-26 2004-09-01 Haniel Baustoff-Industrie Technologie-und Forschungs-GmbH Mur d'une pièce d'une construction
EP1452656A3 (fr) * 2003-02-26 2006-01-04 Haniel Baustoff-Industrie Technologie-und Forschungs-GmbH Mur d'une pièce d'une construction

Also Published As

Publication number Publication date
DE59005203D1 (de) 1994-05-05
ATE103525T1 (de) 1994-04-15
EP0442004B1 (fr) 1994-03-30
ES2052987T3 (es) 1994-07-16
DK0442004T3 (da) 1994-08-08

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