EP0626239A1 - Dispositif de positionnement et d'alimentation de vis - Google Patents

Dispositif de positionnement et d'alimentation de vis Download PDF

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Publication number
EP0626239A1
EP0626239A1 EP93850074A EP93850074A EP0626239A1 EP 0626239 A1 EP0626239 A1 EP 0626239A1 EP 93850074 A EP93850074 A EP 93850074A EP 93850074 A EP93850074 A EP 93850074A EP 0626239 A1 EP0626239 A1 EP 0626239A1
Authority
EP
European Patent Office
Prior art keywords
screw
extension
slide assembly
screws
slide
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.)
Withdrawn
Application number
EP93850074A
Other languages
German (de)
English (en)
Inventor
designation of the inventor has not yet been filed The
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.)
CESA AB
Original Assignee
CESA AB
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 CESA AB filed Critical CESA AB
Priority to EP93850074A priority Critical patent/EP0626239A1/fr
Publication of EP0626239A1 publication Critical patent/EP0626239A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/02—Arrangements for handling screws or nuts
    • B25B23/04—Arrangements for handling screws or nuts for feeding screws or nuts
    • B25B23/045—Arrangements for handling screws or nuts for feeding screws or nuts using disposable strips or discs carrying the screws or nuts

Definitions

  • the present invention relates to a screw positioning and feeding device, comprising a slide assembly engaging a tape or belt holding a plurality of screws, for feeding, by relative reciprocal movement between the slide assembly and a slide housing, said screws one-by-one to a position to be driven in by a screwdriver bit in a power screwdriver coupled to said device
  • Screws of the above described type in the form of a unit which can be mounted on a power screwdriver or power drill with a screwdriver bit, have been available for some fifteen years now, to make the job of setting up gypsum board or plywood with screws go much more quickly and easily. Screws can be sold premounted in plastic tape for easy handling. To position screws one-by-one for screwing, the tape or belt is fed through the device, said tape being aligned to successively bring each screw into position for screwing in. Specially designed perforations in the tape, surrounding each screw shank, allow the tape to rupture and the screw head to pass through the enlarged hole as the screw bit screws in the screw. In this type of feeder attachment, sprocket wheels engage notches in the tape or belt and advance the same one screw for every screw that is screwed in.
  • a ratchet wheel 17 cooperates with a sprocket wheel unit 9 to advance a screw tape one screw for each forward movement of the slide housing (see Figs. 1 and 2 in said specification).
  • the ratchet wheel is rotated by a pin 18 following a slot 19 in the slide housing 3. (See Fig. 3).
  • Adjustments for different lengths of screws are made in this prior art device by a screw ring 30 mounted on the power screwdriver mounting, against which ring stop pins abut to limit the stroke. This makes the device longer and more front-heavy than is necessary.
  • a screw positioning and feeding device of the type described by way of introduction which is characterized in that different lengths of screws are accommodated by an extension adjustably fixed to the slide assembly, the distal end of said extension abutting, during use, against the surface of the material to be screwed into and the proximal end of said extension striking against a rotatable abutment disc securely fixed in said slide housing, when the slide assembly reaches the end of its reciprocal inward stroke into the slide housing, said abutment disc having a spirally curved peripheral abutment surface presenting, in each rotational position, a tangential striking surface approximately perpendicular to a radial line extending from the axis of rotation of said abutment disc through the point of abutment with the proximal end of said extension which moves along said radial line during its reciprocal movement.
  • the extension is set for the nominal dimension of the screw whereafter a fine adjustment is made by rotating the abutment disc to make sure the screw head is driven to the proper depth, i.e. sunken, flush with the surface, etc.
  • the spiral shaped disc presents a striking surface to the proximal end of the extension so that the striking force of the extension is directed towards the axis of rotation of the abutment disc.
  • the striking surface is also approximately perpendicular to the direction of mmovement of the extension.
  • Fig. 1 shows a longitudinal section through a screw positioning and feeding device according to the invention for mounting on a power screwdriver, with the slide assembly removed to reveal the spiral disc.
  • Fig. 2 shows a sectional view (II-II in Fig.1) from above of the device shown in Fig. 1 without the screwdriver bit, but with the slide assembly in place.
  • Figs. 1 and 2 show the screw positioning and feeding device which can be snap mounted on a power screwdriver.
  • the screwdriver bit is held in a chuck.
  • a slide housing 1 holds a slide assembly 2.
  • the slide assembly which includes the nosepiece 3
  • the slide assembly 2 and the slide housing 1 then begin their extension stroke driven by the force of the spring 11.
  • the tape is advanced one screw by the sprocket wheels 4 which engage notches spaced on both sides of the tape.
  • the device is easily snap mounted on the power screwdriver by means of a snapring mounted in a groove 21 at the proximal end of the slide housing 1.
  • Additional length of stroke for accomodating shorter or longer screws can be achieved by disposing the driving element 6 for advancing the sprocket wheels on a rod 13, the opposite or proximal end of which is attached to a block (not shown) which is able to slide in a groove after the driving element has reached its forwardmost position.
  • the adjustment plate 25 can be moved to place the screw 6 in different notches for different lengths of screws (24, 32, 38, 41, 51 and 55 mm in this case) whereafter the screw is tightened to fix the adjustment plate in place for the selected length of screw.
  • the slide assembly as was mentioned above, is pushed into the housing, as the screw is screwed into the material, until the proximal end 9 of the adjusment plate strikes the peripheral surface of a spiral disc 8.
  • the adjustment plate 25 is guided in a groove in the inside wall of the housing 1. A fine adjustment of how far the screw is driven in is often necessary after the basic setting for the length of screw has been made as explained above.
  • This fine adjustment is done to adjust the depth of the screw head when screwed into the material.
  • a sunken screw head is often necessary if the material is to be spackeled and painted or wallpapered later. Also different materials will have different requirements. Softer materials cannot tolerate excessive depth of the screw head for example.
  • a spiral disc or cam is arranged on the inside wall of the housing to present an abutment surface for the adjusment plate to vary the length of stroke of the slide assembly 2.
  • the spiral disc can be rotated by means of a knob mounted on the outside of the housing with a commmon axle passing through the disc and the knob.
  • the rate of increase in radius of the spiral disc 8 is exaggerated in Fig. 1 for the sake of illustration.
  • the spiral shape as opposed to an elliptical shape for example, it is possible to vary the length of travel of the slide assembly and always present an abutment surface for the end 9 of the adjustment plate 25 which is for all practical purposes not oblique. Since the adjustment plate during its inward movement is directed towards the rotational axis of the spiral disc, the disc will not have any tendency to be gradually knocked out of proper adjustment by the repeated impact of the adjustment plate against the disc.
  • the knob 10 and spiral disc 8 can be rotated to a plurality of discrete positions defined by spring snap means or can be infinitely variable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
EP93850074A 1993-04-07 1993-04-07 Dispositif de positionnement et d'alimentation de vis Withdrawn EP0626239A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP93850074A EP0626239A1 (fr) 1993-04-07 1993-04-07 Dispositif de positionnement et d'alimentation de vis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93850074A EP0626239A1 (fr) 1993-04-07 1993-04-07 Dispositif de positionnement et d'alimentation de vis

Publications (1)

Publication Number Publication Date
EP0626239A1 true EP0626239A1 (fr) 1994-11-30

Family

ID=8215306

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93850074A Withdrawn EP0626239A1 (fr) 1993-04-07 1993-04-07 Dispositif de positionnement et d'alimentation de vis

Country Status (1)

Country Link
EP (1) EP0626239A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997024205A1 (fr) * 1995-12-27 1997-07-10 Habermehl G Lyle Couplage d'element de boitier de perceuse mecanique
US6109145A (en) * 1996-12-23 2000-08-29 Habermehl; G. Lyle Power drill housing extension coupling
US9616557B2 (en) 2013-03-14 2017-04-11 Black & Decker Inc. Nosepiece and magazine for power screwdriver

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0058986A2 (fr) * 1981-02-23 1982-09-01 Nisco Inc. Dispositif d'alimentation en vis à utiliser avec outil à moteur pour serrer les vis
DE4208715A1 (de) * 1991-03-18 1992-09-24 Makita Corp Schrauber

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0058986A2 (fr) * 1981-02-23 1982-09-01 Nisco Inc. Dispositif d'alimentation en vis à utiliser avec outil à moteur pour serrer les vis
DE4208715A1 (de) * 1991-03-18 1992-09-24 Makita Corp Schrauber

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997024205A1 (fr) * 1995-12-27 1997-07-10 Habermehl G Lyle Couplage d'element de boitier de perceuse mecanique
US5662011A (en) * 1995-12-27 1997-09-02 G. Lyle Habermehl Power drill housing extension coupling
US6109145A (en) * 1996-12-23 2000-08-29 Habermehl; G. Lyle Power drill housing extension coupling
US9616557B2 (en) 2013-03-14 2017-04-11 Black & Decker Inc. Nosepiece and magazine for power screwdriver
US10406661B2 (en) 2013-03-14 2019-09-10 Black & Decker Inc. Nosepiece and magazine for power screwdriver
US11673241B2 (en) 2013-03-14 2023-06-13 Black & Decker Inc. Nosepiece and magazine for power screwdriver

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