EP0532819A1 - Dispositif d'alimentation et de positionnement des vis - Google Patents

Dispositif d'alimentation et de positionnement des vis Download PDF

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Publication number
EP0532819A1
EP0532819A1 EP91850224A EP91850224A EP0532819A1 EP 0532819 A1 EP0532819 A1 EP 0532819A1 EP 91850224 A EP91850224 A EP 91850224A EP 91850224 A EP91850224 A EP 91850224A EP 0532819 A1 EP0532819 A1 EP 0532819A1
Authority
EP
European Patent Office
Prior art keywords
screw
tape
slide
slide assembly
bit
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
EP91850224A
Other languages
German (de)
English (en)
Other versions
EP0532819B1 (fr
Inventor
Abraham Chen
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.)
Sheh Fung Screws Co Ltd
Original Assignee
Sheh Fung Screws Co Ltd
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 Sheh Fung Screws Co Ltd filed Critical Sheh Fung Screws Co Ltd
Priority to AT91850224T priority Critical patent/ATE127060T1/de
Priority to EP91850224A priority patent/EP0532819B1/fr
Priority to DE69112622T priority patent/DE69112622T2/de
Publication of EP0532819A1 publication Critical patent/EP0532819A1/fr
Application granted granted Critical
Publication of EP0532819B1 publication Critical patent/EP0532819B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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 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.
  • Such devices are securely fixed to a power screwdriver.
  • a plastic tape or belt is used, the screws being premounted in a series of holes along the tape or band.
  • the tape or belt is fed through the device, said tape being aligned normal to the rotational axis of the screw bit of the power screwdriver when each screw is brought into position for screwing in.
  • 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.
  • a sprocket wheel engages notches in the tape or belt and advances the same one screw for every screw that is screwed in.
  • a device of the type described by way of introduction which is characterized in that said slide assembly comprises a pair of sprocket wheels for advancing said screw tape, which are arranged on either side of the longitudinal axis of the screw bit and have a common rotational axis which intersects at essentially right angles said longitudinal axis of the screw bit.
  • the invention eliminates the need for a grooved holder, the sprocket wheels themselves serving as a holder with the common non-rotating axle of the sprocket wheels being provided with a guide hole for the screw bit.
  • the forces exerted as the screw bit is advanced are directed centrally instead of excentrically.
  • the twin sprocket wheels advance the screw to its centered position for driving as the slide assembly returns to its original extended, spring-biassed position.
  • the return stroke in this manner to advance the screw to its portion for driving instead of an initial position of the forward stroke as in the prior art, it is possible to make the device significantly shorter and thus less front-heavy.
  • This feature also enables the user to place the screw tip of the screw exactly where it is to be screwed in before beginning to push the screwdriver forward to screw in the screw.
  • a slide assembly 4 is displaceable within a slide housing 1 against the force of a helical spring 7.
  • the slide assembly 4 is provided with twin sprocket wheels 56 rotatably journalled on an axle assembly permanently fixed in the slide assembly 1.
  • the non-rotating axle assembly 6 of the twin sprocket wheels 56 is provided with a through-hole 61 through which a screwdriver bit 96 (see Figs 7,8) penetrates for driving the screw into a surface.
  • Said screw bit 96 extends centrally to said helical spring 7 which is at one end slipped onto a cylindrical portion 60 and is held within a cylindrical bracket 32 at its other end.
  • the slide assembly is provided with shoulders 48 in grooves 21 in the slide housing 2, the sprocket wheel axle assembly 6 is held securely in the slide assembly 4 by cylindrical portions 62,63 which rest in cylindrical cavities 4,21 in the slide assembly 4.
  • Two sprocket wheels 56 are rotatably journalled on shoulders adjacent the central portion of the sprocket wheel axle assembly 6.
  • a screw 152 screwed into said axle assembly holds a slide limiting plate 15 in place, the functioning of which will be explained below.
  • the slide assembly is also provided with a pawl mechanism 52 (see in particular Fig 3), comprising twin pawls 522 which are spring 54 mounted on a carriage 51.
  • the carriage 51 is biassed against an abutment in the slide housing by means of compression springs 8 (see Fig 1).
  • the pawl carriage assembly is slidable in slots 41 in either side of the slide assembly 4 via screws 511,512 with heads 510,513.
  • Said twin pawls 522 are held spaced apart by a spacer bar 521 and can rock about said screws 511 which pass through holes 523 in each pawl.
  • the forward end 411 of the slot 41 curves downwards to enable the twin pawls 522 to follow the circumference of the sprocket wheels as the pawl mechanism 52 advances and snaps over one sprocket as the slide assembly is pushed into the slide housing 2.
  • Said sprocket wheels 56 advance, by one screw at a time, a tape or belt 16 in which screws have usually been preinserted by machine before delivery to the user.
  • Such tapes or belts 16 are known in the art and one example is shown in Fig 9 without screws inserted, however, to reveal the tear-shaped perforations 163 surrounding each screw collar 164, which perforations enable the screw being screwed in to rupture the collar 164 and allow the screw head 171 to pass through the tape 16.
  • Notches 162 on either side of the tape 16 engage the twin sprocket wheels 56.
  • Fig 10 shows a series of screws 17,18 mounted in such a tape 16.
  • the screw bit 96 is held in the chuck of a power screwdriver 9 of conventional type.
  • the tip of the screw held centrally in the front end of the slide assembly by the tape 16 and the sprocket wheels 56, is positioned at the precise surface position where the screw is to be screwed in.
  • the power screwdriver then presses forward manually in the user's hand so as to advance the screwdriver bit 96 to engagement with the head of the screw.
  • the screw 17 is screwed into the intended material, e.g. gypsum board 13 on a substrate 14 of wood, whereby the screw head 171 ruptures the tape collar 164 and passes through the tape 16.
  • the slide assembly 4 After the screw has been screwed in completely and the operator releases the manual pressure on the screwdriver, the slide assembly 4 begins its return to its original extended position shown in Fig 1. In doing so, the twin pawls 522 engage sprockets on the sprocket wheels 56 turning the wheel clockwise as viewed in Fig 1 until a spring 57 snaps in behind the next sprocket.
  • the entire mechanism can be made shorter and thus less front-heavy, which is a distinct ergonomic advantage. Since the screw to be screwed in is already in place before the user begins to push the screw driver gun forward, the tip of the screw can be placed at its exact position before the screwing operation is initiated.
  • Figs 5, 6 and 8 show the arrangements 4 securely and adjustably mounting the device according to the invention on an automatic screwdriver.
  • Fig 5 which is a rear view of the slide housing 2
  • the rear of the slide housing has a hole 31 for accommodating the end of a threaded adapter pipe 91 (see Fig 6), said end can be clamped securely in place by means of a slot 30 which is closed by a screw 32 countersunk 22 in the slide housing 2.
  • a screw collar 92 is used to provide an adjustable abutment for rear end surfaces 151,152 of the adjustment plate 15 which extend from the rear of the slide housing. This limits the extent of retraction of the slide assembly into the slide housing 2.
  • a threaded collar 93 can be used to adjust the spacing between the device according to the invention and the power screw driver so as to provide for optimum screw depths.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Moving Of Heads (AREA)
  • Feeding Of Articles To Conveyors (AREA)
EP91850224A 1991-09-16 1991-09-16 Dispositif d'alimentation et de positionnement des vis Expired - Lifetime EP0532819B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT91850224T ATE127060T1 (de) 1991-09-16 1991-09-16 Vorrichtung zum positionieren und zuführen von schrauben.
EP91850224A EP0532819B1 (fr) 1991-09-16 1991-09-16 Dispositif d'alimentation et de positionnement des vis
DE69112622T DE69112622T2 (de) 1991-09-16 1991-09-16 Vorrichtung zum Positionieren und Zuführen von Schrauben.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91850224A EP0532819B1 (fr) 1991-09-16 1991-09-16 Dispositif d'alimentation et de positionnement des vis

Publications (2)

Publication Number Publication Date
EP0532819A1 true EP0532819A1 (fr) 1993-03-24
EP0532819B1 EP0532819B1 (fr) 1995-08-30

Family

ID=8208998

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91850224A Expired - Lifetime EP0532819B1 (fr) 1991-09-16 1991-09-16 Dispositif d'alimentation et de positionnement des vis

Country Status (3)

Country Link
EP (1) EP0532819B1 (fr)
AT (1) ATE127060T1 (fr)
DE (1) DE69112622T2 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339713A (en) * 1993-05-03 1994-08-23 Hou Chih Hsiang Automatic screw feed-in apparatus
EP0648579A3 (fr) * 1993-10-13 1996-01-10 Japan Power Fastening Co Ltd Bande pour tenir un train de vis.
GB2291612A (en) * 1994-07-22 1996-01-31 Max Co Ltd Screwdriver
EP0738564A1 (fr) * 1995-04-21 1996-10-23 Max Co., Ltd. Dispositif de guidage dans un dispositif de vissage pour vis assemblées en bande
CN1081973C (zh) * 1998-04-06 2002-04-03 有限会社新城制作所 螺钉拧紧装置
TWI642519B (zh) * 2018-06-22 2018-12-01 佑泰工業有限公司 螺絲釘槍送釘裝置

Citations (3)

* 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
AU556811B2 (en) * 1983-05-27 1986-11-20 Nietek Pty. Ltd. Feeding rivets
EP0248101A1 (fr) * 1986-06-05 1987-12-09 SFS Stadler AG. Mécanisme d'alimentation des éléments de fixation montés sur une bande à un outil de pose de tels éléments

Patent Citations (3)

* 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
AU556811B2 (en) * 1983-05-27 1986-11-20 Nietek Pty. Ltd. Feeding rivets
EP0248101A1 (fr) * 1986-06-05 1987-12-09 SFS Stadler AG. Mécanisme d'alimentation des éléments de fixation montés sur une bande à un outil de pose de tels éléments

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339713A (en) * 1993-05-03 1994-08-23 Hou Chih Hsiang Automatic screw feed-in apparatus
EP0623426A1 (fr) * 1993-05-03 1994-11-09 Chih-Hsiang Hou Dispositif d'avancement par vis automatique
EP0648579A3 (fr) * 1993-10-13 1996-01-10 Japan Power Fastening Co Ltd Bande pour tenir un train de vis.
US5544746A (en) * 1993-10-13 1996-08-13 Japan Power Fastening Co. Ltd. Belt for holding a train of screws
GB2291612A (en) * 1994-07-22 1996-01-31 Max Co Ltd Screwdriver
GB2291612B (en) * 1994-07-22 1998-12-23 Max Co Ltd Screw tightener
US5899126A (en) * 1994-07-22 1999-05-04 The Max Co., Ltd. Screw tightener
EP0738564A1 (fr) * 1995-04-21 1996-10-23 Max Co., Ltd. Dispositif de guidage dans un dispositif de vissage pour vis assemblées en bande
US5839332A (en) * 1995-04-21 1998-11-24 Max Co., Ltd. Screw guide in linked-screw tightener
CN1081973C (zh) * 1998-04-06 2002-04-03 有限会社新城制作所 螺钉拧紧装置
TWI642519B (zh) * 2018-06-22 2018-12-01 佑泰工業有限公司 螺絲釘槍送釘裝置

Also Published As

Publication number Publication date
ATE127060T1 (de) 1995-09-15
DE69112622T2 (de) 1996-04-25
DE69112622D1 (de) 1995-10-05
EP0532819B1 (fr) 1995-08-30

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