WO2011008152A1 - Procédé pour obtenir une économie de temps et un perçage durable ergonomique et fixation de feuilles métalliques à l'aide d'un outil manuel pour entraîner une vis de perçage et vis de perçage pour réaliser ledit procédé - Google Patents

Procédé pour obtenir une économie de temps et un perçage durable ergonomique et fixation de feuilles métalliques à l'aide d'un outil manuel pour entraîner une vis de perçage et vis de perçage pour réaliser ledit procédé Download PDF

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Publication number
WO2011008152A1
WO2011008152A1 PCT/SE2010/000193 SE2010000193W WO2011008152A1 WO 2011008152 A1 WO2011008152 A1 WO 2011008152A1 SE 2010000193 W SE2010000193 W SE 2010000193W WO 2011008152 A1 WO2011008152 A1 WO 2011008152A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw
drilling
sheet
threads
piercing
Prior art date
Application number
PCT/SE2010/000193
Other languages
English (en)
Inventor
Stefan SJÖSTRÖM
Original Assignee
Sjoestroem Stefan
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 Sjoestroem Stefan filed Critical Sjoestroem Stefan
Publication of WO2011008152A1 publication Critical patent/WO2011008152A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
    • F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
    • F16B25/0021—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the material being metal, e.g. sheet-metal or aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
    • F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
    • F16B25/0084—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by geometric details of the tip

Definitions

  • the present invention relates to a method to obtain a time saving and ergonomic sustainable piercing and fixing of metal sheets by using hand held power tool for driving a drilling screw and a drilling screw to carry out said method.
  • US-A 5 120 172 discloses a drilling screw having two different drilling diameters.
  • this screw is effective in a piercing work and may rapidly work through two plates. Otherwise it reminds about a conventional drilling screw having its thread all the way up to the head of the screw. This causes a sudden stop when the screw is completely inserted. This stop gives rise to a momentum torque load on the power tool and on the operator. The stop is also a confirmation that the screw is fully inserted. During a professional and over time long lasting mounting of plates the existing loads at the stop of the screw may injure the operator. Also the beginning of each piercing moment when the drill machine is kept still with a high precision and with a repeated tensioning of the same muscles and group of muscles will give rise to an increased risk for permanent damages on the operator.
  • EP 0979358 Bl discloses a screw with a conventional drilling tip and with a periphery thread portion ending at a distance from the head of the screw. Thus this screw will decrease the sudden chock at a screw being inserted to the bottom, but have the drawbacks of a conventional screw when it comes to be efficient in the piercing process.
  • the main object with the present invention is to obtain a method for time saving and ergo- nomic sustainable piercing and fixing of metal sheets by using hand held tool for driving a drilling screw and where the drawbacks mentioned above have been eliminated.
  • an efficient piercing by a rapid drill action shall be facilitated.
  • a sudden stop including the risk of fatigue stresses on the operator and breakage of the drilling screw will be avoided by eliminating the sudden torque load when the screw reaches its fully inserted bottom position.
  • Another object of the present invention is to obtain a drilling screw with a resilient sealing washer being recessed at the under side of the screw head, which washer will further decrease the torque load when the screw is in its fully inserted position. Tolerance differences makes up of tolerances which can exist in the plate material. Furthermore this elastic washer can according to its thickness be so adapted to the position of the thread end and form along the screw that it creates a snapping sound or a weak vibration is sensed when the screw is fully inserted, which sound or vibration is created when the end turn of the thread is moving towards the bottom side of the second plate. This action require that the elastic washer also has a relatively low friction coefficient besides of being elastically non rigid.
  • Yet another object with the invention is to obtain a drilling screw where the thread formation closest to the screw head intentionally has been weakened so that the created threads at the edges of the holes may break these threads. It is possible to arrange this weakened thread formation so that a distinct sound is created and/or a short reaction of momentum in the hand held tool as a clear indication for the operator that the screw is fully and correct inserted. The metal pieces from the broken threads may assist in locking the screw in its inserted position.
  • Fig. 1 discloses a diagrammatic side view of a drilling screw (1) according to the invention during drilling through double sheets (2, 3) in a position where the first sheet just has been pierced by a smaller drilling tip (A).
  • the length (L) of the thinner drilling tip is adapted to the thickness (2, 3) of the jointed materials.
  • Fig. 2 discloses the view according to fig. 1, but where the thinner tip (A) of the drill just has passed the second sheet and where the drilling with the other wider tip portion (B) in the second sheet is initiated.
  • Fig. 3 discloses the drilling screw (1) according to fig. 1 in a completely inserted position, and where the jointed sheets (2, 3) has been pressed together to a final position in a thread free portion (D) of the screw.
  • Fig. 4 discloses a side view of a variant of the drilling screw (1) according to the invention in the completely inserted position with an intermediate resilient washer (4) between the head (E) of the screw and the sheet (2).
  • a drilling screw (1) is shown with a first cutting tip portion (A) having a relatively small diameter (dl) with the object to rapidly be able to drill a hole in a first sheet (2).
  • the length of the first cutting tip portion (Ll) may principally be equal to the thickness of the first sheet (2).
  • this first sheet (2) is pierced the other cutting drill portion (B) with the bigger diameter (d2) to be introduced into a cutting engagement with the first sheet (2), which stabilizes and steer up the whole drilling screw (1) and will prevent that the tip of the drill will slide transversely when hitting the surface of the second sheet (3).
  • the first tip portion (A) is a little shorter than the thickness of the first sheet (2).
  • fig. 3 is shown how the drilling screw (1) has come to a fully inserted position and where the lack of threads (D) along the body of the drilling screw in connection to the screw head (E) will prohibit that a certain stop in the rotation occurs. This is also a clear and distinct signal to the operator that the screw will run without engagement in the drilled holes in the sheets (2) and (3).
  • the upper thread (6) may be relatively flattened to increase the anvil action towards the bottom sheet (3) in the completely inserted position.
  • a resilient washer (4) or a resilient part under the head (E) of the drilling screw (1) will also take up the tolerances in the thickness of the different materials.
  • a thread free portion (D) is shown with an extension lengthwise corresponding to the aggregated thickness of the work pieces/sheets.
  • the washer (4) can also be inserted in the head (E) of the screw and have a significant sealing action between the head of the screw and the upper side of the upper sheet. A hidden position will protect the washer from UV radiation and degradation.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Connection Of Plates (AREA)

Abstract

La présente invention porte sur un procédé pour obtenir une économie de temps et un perçage durable ergonomique, en formant des filetages et en fixant au moins deux feuilles métalliques (2, 3) à l'aide d'un outil manuel pour entraîner une vis de perçage (1) avec différents diamètres de coupe (A, B) et avec une partie filetée (C) ayant une extension de périphérie limitée des filetages. L'invention est caractérisée en ce que la vis (1) avec une partie de pointe de perçage (A) limitée dans le sens de la longueur (L1) et avec un diamètre (d1) plus petit est amenée à une prise de coupe avec la surface de la première feuille (2) de telle sorte que, lors d'un perçage en continu ou d'un perçage de finition à travers la première feuille, le second diamètre plus grand (B) de la vis est amené dans une position pour démarrer son travail de perçage dans la première feuille (2), laquelle seconde feuille (3) est atteinte par la partie de pointe (A) de la vis de perçage (1), après quoi un perçage dans la seconde feuille (3) est démarré et se poursuit jusqu'à ce qu'une rupture traversante se produise également avec le second diamètre plus grand (B), laquelle partie filetée (C) sur la vis de perçage est amenée à une prise de formation de filetage avec des trous percés dans les feuilles (2, 3) et fait avancer la vis de perçage (1) vers une position de butée d'extrémité dans laquelle les bords des trous dans les feuilles dépasseront la partie filetée (C) et atteindront une partie sans filetages ou avec des filetages pouvant être rompus, ce par quoi la première feuille (2) viendra simultanément reposer contre le côté inférieur de la tête de vis (E).
PCT/SE2010/000193 2009-07-14 2010-07-14 Procédé pour obtenir une économie de temps et un perçage durable ergonomique et fixation de feuilles métalliques à l'aide d'un outil manuel pour entraîner une vis de perçage et vis de perçage pour réaliser ledit procédé WO2011008152A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0900987 2009-07-14
SE0900987-9 2009-07-14

Publications (1)

Publication Number Publication Date
WO2011008152A1 true WO2011008152A1 (fr) 2011-01-20

Family

ID=43449587

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2010/000193 WO2011008152A1 (fr) 2009-07-14 2010-07-14 Procédé pour obtenir une économie de temps et un perçage durable ergonomique et fixation de feuilles métalliques à l'aide d'un outil manuel pour entraîner une vis de perçage et vis de perçage pour réaliser ledit procédé

Country Status (1)

Country Link
WO (1) WO2011008152A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4621963A (en) * 1984-03-26 1986-11-11 Elco Industries, Inc. Fastener for roof assemblies and the like
US5120172A (en) * 1991-04-15 1992-06-09 Wakai & Co., Ltd. Tapping screw
EP0979358B1 (fr) * 1997-05-02 2001-11-07 SFS Industrie Holding AG Vis
US20040120792A1 (en) * 2002-08-14 2004-06-24 Winter David C. Pole joint screw for a basketball goal system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4621963A (en) * 1984-03-26 1986-11-11 Elco Industries, Inc. Fastener for roof assemblies and the like
US5120172A (en) * 1991-04-15 1992-06-09 Wakai & Co., Ltd. Tapping screw
EP0979358B1 (fr) * 1997-05-02 2001-11-07 SFS Industrie Holding AG Vis
US20040120792A1 (en) * 2002-08-14 2004-06-24 Winter David C. Pole joint screw for a basketball goal system

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