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WO2012139150A1 - Dispositif de retenue et d'entraînement de vis - Google Patents

Dispositif de retenue et d'entraînement de vis Download PDF

Info

Publication number
WO2012139150A1
WO2012139150A1 PCT/AU2011/000435 AU2011000435W WO2012139150A1 WO 2012139150 A1 WO2012139150 A1 WO 2012139150A1 AU 2011000435 W AU2011000435 W AU 2011000435W WO 2012139150 A1 WO2012139150 A1 WO 2012139150A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw
head
holding
shaped recess
driving tool
Prior art date
Application number
PCT/AU2011/000435
Other languages
English (en)
Inventor
James David Francis West
Original Assignee
Bluedog Fences Australia Holdings Pty 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 Bluedog Fences Australia Holdings Pty Ltd filed Critical Bluedog Fences Australia Holdings Pty Ltd
Priority to PCT/AU2011/000435 priority Critical patent/WO2012139150A1/fr
Publication of WO2012139150A1 publication Critical patent/WO2012139150A1/fr

Links

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
    • B25B23/0007—Connections or joints between tool parts
    • B25B23/0035—Connection means between socket or screwdriver bit and tool
    • 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
    • B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
    • B25B23/10—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means

Definitions

  • the present invention relates to screw holding and driving devices and screws for use therewith.
  • the present invention provides a screw holding and driving tool having a driving end and a screw holding end, the screw holding end includes a screw holder having a shaped recess to receive the head of a screw, the shaped recess being shaped so that the screw can enter the shaped recess and once therein can be rotated in and relative to the screw holding end to at least one location where the screw cannot axially exit the shaped recess.
  • At least one alignment means can be provided which enables an operator to determine if a screw head is correctly rotationaUy aligned in the shaped recess.
  • the alignment means can be one or more than one of the following: a detent to prevent the screw head from rotating past a predetermined alignment; a texture! or tactile referencing which operates between the screw head and the shaped recess; a mating of part of the screw head with a formation associated with the shaped recess; a visual indication on the screw head which can be aligned with a visual indicator associated with the shaped recess.
  • the alignment means can be a detent means which engages at least one projection or formation on the screw head. [008] Once the detent prevents further rotation of the screw, the combined screw and holder can be able to drive the screw.
  • a drive formation on the screw can be aligned with a drive shaft in the tool, and the drive shaft can engage the drive formation.
  • a bearing surface located on an under surface of the screw head can be located outside of the screw holding end.
  • the screw holding end can include an expansion means to expand a portion of the screw holder to release the screw from the screw holder.
  • the shaped recess and the detent means can be formed in an expandable collar or jaws arranged on the screw holding end, whereby the collar or Jaws can move from a closed to an open condition.
  • the collar or jaws can be an assembly of collar or jaw segments, which are pivotally arranged on the screw holding end.
  • the expansion means can include said collar or Jaws cooperating with a sleeve slidably mounted in said screw holding end and which projects therefrom, so that as said sleeve contacts a surface receiving a screw, said colar or jaw segments are able to move from a closed to an open condition.
  • the screw holding end can be arranged so as to be slidable and or rotatable on a drive shaft or drive shaft housing associated with the driving end.
  • the drive shaft or drive shaft housing and the screw holder cooperate to direct the sliding of one relative to the other and or direct the rotation of one relative to the other.
  • Directing of sliding, and or rotation of the drive shaft or drive shaft housing and the screw holder can be controlled by means of a channel and a follower travelling in the channel.
  • the follower can be at least part spherical and the channel includes deeper portions so that when the follower is In the deeper portions, a greater force can be required to move the follower out of the deeper portions.
  • the shaped recess can be of a multiple lobed or multiple apexed shape.
  • the shaped recess can be one of the following: a two lobed shape; a three lobed shape; a four lobed shape; a five lobed shape; a six lobe shape; a two apex shape; a three apex shape; a four apex shape; a five apex shape; a six apex shape.
  • the at least one projection or formation on the screw can be one or more lobes or apexes formed on the screw head periphery.
  • adjustment means can be provided to enable said drive shaft to have its angular alignment with said shaped recess adjusted.
  • the adjustment means can be provided between the screw holding end and the drive shaft housing or between the drive shaft housing and the drive shaft.
  • the shaped recess can be helically arranged, and the screw can have a lobe which is helical or part helical.
  • a screw having a threaded shank and a screw head, the screw head having an upper portion and an underneath portion which can act as a bearing surface, wherein the screw head, when viewed from above, has a multiple lobe or apex profile at an outer periphery.
  • the screw head can have 2, 3, 4, 5 or 6 lobes or apexes.
  • the lobes or apexes can include a flanged portion.
  • Each lobe or apex and the portion of the head between each lobe or apex can have between them a periphery which forms a portion of the periphery of the screw head, which can be curved or straight.
  • the bearing surface can be generally round with the lobes or apexes projecting away from the head.
  • the bearing surface can be perpendicular to a longitudinal axis of the shank.
  • the screw head can have an upper surface having a periphery which can be tapered or converging with respect to a longitudinal axis of the shank. [033] In a central location on the screw head, there can be located a drive formation.
  • the drill bit formation includes two portions having different diameters.
  • the diameter of the drill bit at the extremity of the shank can be less than the next adjacent drill bit formation on the shank.
  • the two portions can be each straight sided.
  • a transition between the two portions can be a tapered section.
  • the present invention also provides a screw having a threaded shank and a screw thread, the screw head having an upper portion and an underneath portion which acts as a bearing surface, wherein at the end of the shank opposite to the screw head can be a drill bit .formation which includes two portions having different diameters.
  • the diameter of the drill bit at the extremity of the shank can be (ess than the next adjacent drili bit formation on the shank.
  • the two portions can each be straight sided.
  • a transition between the two portions can be a tapered section.
  • Figure 1 illustrates a perspective view of a screw holder and driver device
  • Figure 2 Rlustrates an exploded view of the screw holder and driver of Figure 1;
  • Figure 3 is illustrates a detaifed perspective view of the screw holding end of the device of Figure 1;
  • Figure 4 illustrates a sub-assembly of one of the components of Figure 2;
  • Figure 5 illustrates a cross section through the device of Figure 1 with a screw located in the shaped recess;
  • Figures 6 to Figure 10 illustrate perspective views and cut away perspective views of the device of Figure 1,with parts removed showing the operation of the device of Figure 1;
  • Figure 12 illustrates a perspective view of a screw holding and driving device similar to that of Figure 1 with a different screw holding end;
  • Figure 13 illustrates an exploded perspective view of the device of Figure 12
  • Figure 14 illustrates in detail a perspective view of one of the jaws of the apparatus of Figure 12;
  • Figure 15 illustrates a plan view of the component of Figure 14
  • Figure 16 illustrates a rear view of the component of Figure 14
  • Figure 17 illustrates a rear perspective view of the component of Figure 14;
  • Figure 18 illustrates an exploded perspective view with hidden detail of the screw holding portion of the device of Figure 12;
  • Figure 19 illustrates the screw holding device in an open condition
  • Figure 20 illustrates the screw holding device In a closed condition
  • Figure 21 Illustrates a cross section through the screw holding device of Figure 12 In a closed condition with a screw In place;
  • Figure 22 illustrates a cross section similar to Figure 21 with the jaws of the screw holding device in an open condition
  • Figure 23 illustrates a cross section similar to that of Figure 21 except that the section plane Is taken through a different diametral plane to that of Figure 21;
  • Figure 24 illustrates a cross section similar to that of Figure 23 with the jaws being; in an open condition
  • Figure 25 is a perspective view of a screw
  • Figure 26 is an underneath perspective view of the screw of Figure 25;
  • Figure 27 is a plan view of the screw of Figure 25;
  • Figure 28 is an upper perspective view of another screw for use with the device previously described;
  • Figure 29 is an underneath perspective view of the screw of Figure 28;
  • Figure 30 is a plan view of the screw of Figure 28;
  • Figure 31 illustrates an upper perspective view of a screw for use with the device described above;
  • Figure 32 is an underneath perspective view of the screw of Figure 31 ;
  • Figure 33 is a plan view of the screw of Figure 31 ;
  • Figure 34 illustrates an upper perspective view of a screw for use with the device of previous Figures
  • Figure 35 is an underneath perspective view of the screw of Figure 34;
  • Figure 36 is a plan view of the screw of Figure 34;
  • Figure 37 is a side view of the screw holder of the device of Figure 1 showing the position of the screw of Figure 25 mounted therein;
  • Figure 38 illustrates a side view of a screw having a stepped drill portion
  • Figure 39 illustrates an upper perspective view of the screw of Figure 40
  • Figure 40 illustrates an underneath perspective view of the screw of Figure 38
  • Figure 41 illustrates a plan view of the screw of Figure 38
  • Figure 42 illustrates a cross section through a screw holder and driving device simila to Figure 1 also with a screw head located in the shaped recess ;
  • Figure 43 illustrates a rear perspective view of screw holder portion having six engagement slots
  • Figure 44 illustrates a rear perspective view of a screw holder and driving device having indexed adjustment of alignment of between screw holder and outer housing;
  • Figure 45 illustrates a rear perspective view of a screw holder and driving device having adjustment of alignment between the screw holder and outer housing;
  • Figure 46 illustrates a front perepectlve view of a portion of a screw holder and shaped recess;
  • Figure 47 illustrates an alternative screw holder and shaped recess formation
  • Figure 48 illustrates a further screw holder and shaped recess formation
  • Figure 49 illustrates a close up front view df the shaped recess and screw holder of F3 ⁇ 4ure 1;
  • Figure 50 illustrates a front view of the shaped recess and screw holder of Figure 46 and 47;
  • Figure 51 illustrates a front view of the shaped recess and screw holder of Figure 48;
  • Figure 52 illustrates a perspective view of a screw having helically shaped lobes or formations on its screw head periphery
  • Figure 53 illustrates a cross section through part of a screw holder having a helical channel to receive the screw of Figure 52.
  • FIG. 1 Illustrated in Figure 1 is a perspective view of a screw holder and driving device 10 which has a screw holder 12 at one end into which can be received a screw 14 and at the other end, being the driving end 16, a hex drive shaft 18.
  • the hex drive shaft 18 is mounted in a housing 20 and is mechanically connected with respect thereto by welding or other means.
  • the other end of the housing 20 has a -hexagonal aperture 22 into which can be received a magnet 24 and a hex drive shaft 26 as is best illustrated in Figure Z
  • the magnet 24 helps to keep the screw engaging drive shaft 26 connected to the drive shaft 18 so that when in a vertical condition the shaft 26 does not fall from the housing 20.
  • the magnetic force of the magnet 24 has to be overcome before the shaft 26 can move out of the housing 20. This is done by an operator pulling with sufficient force on the shaft 26. This might be necessary so as to replace the shaft 26 whose drive shaft end 28 may wear because of use.
  • An outer cylindrical housing 30 receives the housing 20 therein via a cylindrical aperture 32.
  • ball bearings 36 and 38 are positioned in radial bores 40 into a circumferential channel 34, and then held in place by a shaped clip 42 which hes bearing holders 44 and 46 thereon to hold, the bearings 36 and 38 h position in the apertures 40 so that they will engage.
  • a spring clip 48 is positioned in the grove 34 so that the opposed termini of the spring clip 48 overlap with the termini of the clip 42.
  • the clip 42 can be formed from a spring or may be a nylon or low friction type plastic material to hold the bearings 36 and 38 in place with the spring force only coming from metallic spring 48.
  • the balls 36 & 38 can roll along respective a shaped grooves or channels 50 (of which only one Is visible in the figures), but slide over or against the surface of clip 42.
  • the channel 50 has a deep portion 52 located at an intermediate location on a straight segment 54, another deep portion 53 at the end of straight segment 51, and a further deep portion 56 which is located at the end of a helically formed portion 58.
  • the distance 60 from the middle of the deep portion 52 to the end of the straight segment 54 which joins the start of the helix shaped portion 58, is fractionally larger than the depth 62 on the driving end 28 of the bit 26 that is Inserted into the head of a screw. As will be explained later this distance 60 ensures that the housing 20 must first extract the tool 26 from the screw head before relative rotation between the outer housing 30 and thus screw holder 12 begins to occur.
  • the screw holder 12 is attached by mating axially extending grooves 64 and aligning them with radial projections 68 which are angularly equi-spaced around a reduced diameter portion 70 of the external housing 30.
  • a spring steel ring 74 is located in circumferential channel 76 to thereby hold the screw holder 12 to the external housing 30.
  • the ring 74 is of a spring steel so that it can flex enough to be assembled and also be strong enough to bear the axially compressive forces which may result from the bearing relationship between the groove 76 and 64 relative to the projection 68 on the outer housing 30.
  • the screw holder and drive bit 28 are preferably in this location so that the operator is able to view the tip 28 and engage ' it easily with drive recess 111 or screw 14, without being obscured by the screw holder 12. In this case the screw 14 is already held in the material receiving the screw and is thus already stable.
  • the shaped recess 80 is not a circular shaped recess but rather Is a drcumferentially arranged shaped recess to receive a tri-lobal headed screw, having three full depth sections 82, 84 and 86 which are at 120 degrees with respect to each other;
  • the shaped recess 80 has no moving parts and Is integrally moulded or formed in the end of the screw holder 12. Sections 82, 84 and 86 to allow axial engagement of a screw head such as those illustrated in Figures 25 through to 38 into the shaped recess 80.
  • Three outer shoulder regions 83, 85 and 87 are also provided which have an undercut or lip, or channel 90, visible only with respect to the section 87 in figure 3, but has corresponding lips, undercuts or channels adjacent or formed as part of the sections 83 and 85 as Is visible in Figure 4 ⁇ . These lips, undercuts or channels will prevent the relative axial movement between the screw holder 12 and a screw positioned and rotated, so that its projecting lobes are located in the channel 90.
  • the lips, undercuts or channels 90 by being of matching depth to the thickness or depth of the lobes 102, then by interaction of a screw head 108 and or lobes 102 with the rear channel wall or annular surface 81 and the outboard or forward rim or sides of the channel 90, this will prevent adverse rotation of the screw head from a couple or moment applied to the screw about an axis perpendicular to the direction of the shank of the screw 14.
  • the channel 90 is sized or of a width to receive a lobe of figure 28 for example, then while lobe 102 of figure 25 may be held by the shape recess 80, the previously described interactions between the lobes and the walls of the recess 80 will not be evident.
  • the thickness of the channel 90 must be matched to the thickness or depth of the lobes or screw head otherwise buckling may be experienced.
  • the shaped recess 80 and the thickness of the channels 90 is provided for one screw arrangement only.
  • This "bayonet" action, of the screw head or lobes 102 engaging the shaped recess 80 achieves three results. The first is that the operator can let go of the screw and it will not fall out of the holder 12. Secondly, it will align the drive formation of the screw, as mentioned above, so that axial movement of the drive tip 28 will be correctly aligned to enter into the hexagonal drive formation of the screw. Thirdly engagement of the screw in the shaped recess enables the screw to be driven without concern about buckling of the screw relative to the screw holder 12 and the surface receiving the screw.
  • the channel 90 has a' detent or termination 92 whereby the depth of the channel is decreased as the channel approaches the formation 82, this decreasing in the channel depth ensures that the screw wiH not go past a predetermined location namely that point of alignment of the hexagonal drive formation 111 in the screw head 102, relative to or allowing it to receive the drive bit 28 via a combination of rotation and axial movement as directed by the grooves 50.
  • Figures 6 to 10 Illustrated in Figures 6 to 10 are various representations of the device 10.
  • the outer housing 30 has been removed for the purposes of illustration.
  • Figure 7 has the components in the same position as those of Figure 6 with the outer housing 30 removed.
  • Figure 9 has the same arrangement of components with the differences between Figures 7 and 9 showing the relative rotation and translation which results from the groove 50 on housing 20 which causes relative translation and rotation with respect to the external housing 30 and the ball bearings 38 and 38.
  • the screw being placed into the shaped recess 80 requires, in view of the trilobal shape of the shaped recess and/or screw head, that the screw be rotated through 60 degrees (that is half of 120 degrees) from the formation 82 through to the formation .83 or 84 to 85 or 86 to 87. if a greater number of lobes were provided, the amount of rotation to lock the lobed screw into the correct position in the shaped recess 80 would have a corresponding decrease in the amount of angular rotation required
  • the helix or helical portion of the section 58 of the channel 50 is best expressed by two factors. The first is the number of full revolutions '.travelled" by the helix. For a trl-iobal configuration of the shaped recess 80 and screw head 108, the preferred number of helix revolutions would be half of one third - or one sixth of one revolution (or 60 degrees). Whereas for a quad-lobe or 4 lobe configuration of the shaped recess 80 and the screw head 106, the preferred revolution would be half of one quarter of a revolution - or one eighth of a revolution (or 45degrees).
  • the second factor the pitch of the helix or helical section 58.
  • the helix can be defined as having a pitch equal to approximately 6.9 diameters of the outer surface of the housing 20. This breaks down to 2.2 x ⁇ x (Diameter) which is 2.2 circumferences which corresponds to a tangent ratio of 2.2 which has the angle 65 degrees.
  • the pitch selected will be dependent upon several factors, but it is expected that and a minimum pitch would be of the order of 3.14 Diameters or ( ⁇ XDiameter).
  • 1.0 x ⁇ x (Diameter) is 1 circumference which corresponds to a tangent ratio of 1.0 which has the angle 45 degrees.
  • a pitch greater than 9.4 Diameters which is 3.0 x ⁇ x Diameter which corresponds to 71.5 degrees, would probably not be required or useful.
  • the pitch of the section 58 can be altered. However, the pitch of this section, because it has to lead into the straight sections 54, if it is not of a constant helical pitch then preferably it starts it out with a pitch that is at its maximum closest to the section 54 and decreases in pitch as it moves away from this location, to thereby decrease the overall length of the channel section of the housing 20.
  • the object of the helical portion of the section 58 is to produce, in the case of a trl-iobal screw Head 108 and tri-lobal shaped recess 80, is to produce approximately a one-sixth turn, namely, 60 degrees of rotation so that the screw head can be disengaged from the shaped recess 80.
  • This helix would have to be altered, for example, if a differing amount of rotation had to be produced to disengage the screw head from the shaped recess 80.
  • the steel from which the screw holder 12 is manufactured is of a strength preferably greater than the strength of the screw material and/or its hardness so mat the rate of wear of the screw holder by engagement with screws is of a useful magnitude.
  • the driver bit 28 will protrude past the terminus of the screw holder 12 and thereby ' allow the operator to see the driver in the screw and attempt to drive it further if necessary or to extract K and to find another location for that screw due to the previous Jamming.
  • This overload protection will only function if the bit 28 rotates relative to the screw head. However, such things occur regularly with philNps head screws, for example, and so this built in protection can be a useful feature.
  • the screw head has a tri-lobal formation 102 which is formed on the outer periphery close to the top of the head.
  • the depth of the channel 80 with respect to the terminus of the screw holder is * such so that the bearing surface 104 underneath the head 106 will protrude a depth 108 as illustrated in Figure 37 past the terminus of the screw holder 12. This ensures that once the screw 14 has been tightened into a surface, particularly if it is of metal, the clearance 108 will still be present, allowing the relative rotation of the screw holder 12 with respect to the screw head 106, to thereby allow disengagement thereof, as described above.
  • An advantage of the above arrangement is that once the tri-lobal screw 14 is located inside the screw holder 12, and the bit 28 is engaging the drive formation 111 in the head, a relatively rigid screw holder and driver is located on the dril making it relatively easy for an operator with a single hand to drive such a screw into position, particularly in sheet metal and/or fencing and Hke materials without the need to hold the screw or holder 12.
  • a torque transmission mechanism between the housing 20 and housing 30 can be provided, which can be engaged as desired.
  • the embodiment of Figure 42 which has the bit 26 removed can still be utilised to drive a screw and may be particularly suitable when driving through metal into a timber Axing.
  • the simple pulling back of the drill and thus housing 20, once the screw is secured, will cause the front of the screw holder 12 to rotate relative to the screw, and the screw to be released.
  • FIG. 12 to 24 is another embodiment in which a screw holder and driver is illustrated.
  • the embodiment of Figure 12 which is somewhat similar to that of Figure 1. The difference being that the screw holder 12 is formed similarly with similar formations to receive a trMobal screw, however, these formations are formed in an openabte and closable jaw arrangement as will be described below.
  • the screw holder 12 Is shown in exploded view in Figure 13 and In a better arranged view In Figure 18. Both are provided in order to assist in the understanding of this portion of the device.
  • the screw holder 12 has an outer body 121 which includes the grooves 64 and 76 as in the previous embodiment so as to engage the reduced diameter portion 70 and projections 68.
  • a groove 123 At the forward end of the screw holder body 121 is a groove 123 and a series of three angularly equispaced apertures 124, whose purpose will be described below.
  • the shape of the apertures 124 may be described as part rectangular at their sides and par curved intermediate their sides.
  • an apertured sleeve 125 is positioned so that its three angularly equispaced apertures 126 wil align with the apertures 124.
  • the apertures 126 are of a similar shape and alignment to the apertures 124.
  • three jaw or collar parts 127 Inside the sleeve 125 are assembled three jaw or collar parts 127 which are identically shaped and illustrated in more detail in Figure 14 through to 17.
  • the jaws 127 are circumferentlally shaped with radial tabs 128 at each end to be received into the rectangular portion 12 ⁇ of the aperture 126.
  • the projections 128 when in the apertures 126 will position the radially outward projection 130 inside apertures 131 as is best illustrated in Figure 12.
  • a ball bearing 132 can be pushed between the projections 128 to suitably space them.
  • all three jaws 127 because of the spacing of the respective holes provided by 126 and 124, all three jaws 127.
  • the jaws 127 as illustrated in Figure 15 have a pivot at approximately the location indicated by the line 128.1, which results from contact of a portion of the projections 128 with the body 121.
  • this line 128.1 passes through the projection 130.
  • Forces are transmitted by the screw head to the jaws 127, and or from the jaws 127 to the screw head, via projection 130 and channel 90 and wall 81 which has the channel 90 therein. It will be seen that in the axial direction these forces are applied or transmitted very close to a plane which includes the projection 130 and pivot line 128.1. In this way the applied or transmitted forces tend to produce little or no moment about the axis 128.1. This results in relatively minimal forces which might otherwise act against the operation of the jaws 127
  • the jaws 127 on the Inside surface of the projections 130 have a channel portion 90 as in Figure 3, with a stop surface 92 formed at one end to prevent the lobes of a screw from rotating to past the formation 92.
  • a triloba! shaped recess 80 Is presented which will open to release the screw as described below.
  • the balls 132 and projections 128 also serve to prevent the sleeve 125 tram railing out of the screw holder body 121.
  • a spring housing 138 is inserted into the inside periphery of the sleeve 125.
  • the spring housing 138 has a rim or flange 139 which has an outside diameter greater than the inside diameter of the sleeve 125 but less than the outside diameter of sleeve 125's. This allows the spring housing 138 to be received inside the bore of the screw holder housing 121.
  • a compression spring 140 is then inserted into the spring housing 138 which is now inside the sleeve 125 and is prevented from leaving the screw holder body 121 by means of a circlip 141.
  • the spring 141 and housing 138 bias the sleeve 125 forwardiy away from the body 121.
  • This bias forces the inboard edge 143 of aperture 131 to be positioned in a shoulder 145 at the base, of the projection 130.
  • this prevents the jaws 127 from moving radially outwardly and thus keeps the jaws 127 in the closed condition.
  • Figure 21 where a cross section of a screw has been aiustrated with the jaws 127 engaging the screw head.
  • Figure 22 shows the open condition.
  • the operator has two means by which to release the screw from the screw holder 12.
  • the first means is as the screw IB driven Into the surface and the sleeve 125 retracte into the screw holder body 121, the centripetal forces will allow the Jaws to move radially outwardly whereby once the sleeve 125 has reached the limits of its travel and abuts the circlip 141 with the flange 139 intervening, the balls 36 and 38 will move from the deep location 52 towards the terminus 53 of the straight section 51.
  • the position of the screw head relative to the jaws 127 prevents the jaws 127 dosing.
  • the second means which is applicable to the device of figures 12 to 24, and is a means of disengagement for the device 10 of figures 1 to 11, is that the operator may, once the screw has been inserted to a desired depth and possibly not yet finished to its final depth or torque, may simply pull back on the drill which will cause the balls 36 and 38.to travel down the helical section 58 in relative terms, which will cause the screw holder 12 to rotate relative to the screw 14 and thereby moving the lobes out of respective channels ⁇ 0 which will allow the full axial disengagement of the screw from the screw holder.
  • the operator can pull the outer sleeve 30 back towards the drill forcing the baH bearings 38 and 38 to move to the terminus 53 of the section 51 of the channel 50 thus exposing the tip of the drive bit 26 allowing the operator to simply torque the screw into its home or final location with the clutch control of the drill. This may be needed in a situation where the operator needs to see the screw head making contact with the final resting surface.
  • the operator In order to reload a screw into the shaped recess 80 on screw holder 12 or 121, the operator must push the outer housing 30 away from the drill, so that the ball bearings 36 and 38 move from the position at the end or the terminus 53 of the straight section 51 to the deep section 52 and then on through the helix section 58 to deep portion 56. Where upon the composite shaped recess 80 formed by Jaws 127 is ready to receive another screw therein.
  • FIG. 28 to 30 Illustrated In Figures 28 to 30 is another screw similar to that illustrated in Figures 25 to 27.
  • the screws of Figures 28 to 30 have a lobe formation 102 which is the full depth or thickness of the screw head 106.
  • FIG. 31 to 33 Illustrated in Figures 31 to 33 is another screw variant where a trilobal screw head 106 with lobes 102 is produced and the side edges 313 of the head 108 are chamfered to provide a more secure shaped head which will not be able to be engaged by spanners or other tools.
  • FIG. 34 to 36 Illustrated in Figures 34 to 36 is a further trilobal screw which has a counter sunk head 106 allowing the screw to be fully inserted. Whilst the screws of Figures 25 through to 36 are shown with a hexagonal drive formation 111 other drive formations and special shape arrangements can be utilised to prevent third parties being able to unscrew the screws.
  • FIG. 38 to 41 Illustrated in Figures 38 to 41 is a screw having a head similar to that of Figures 31 to 33 with a hexagonal drive formation 111 illustrated as the drive mechanism.
  • the screw 60 is of the TEK type (registered trade mark) or self-drilling and tapping screw.
  • screw 80 differs from prior art self driling and tapping screws in that a stepped drill Is provided having a first diameter 162 being of a pilot hole size and a larger final diameter drill portion 164 is provided.
  • the drill portion 162 has a sharp point 166 to provide easy starting and biting of driH end 166.
  • a tapered drill portion 168 to altow the reaming out or counter-boring of the hole drilled by bit 162 by the bit portions 168 and 164.
  • the length of the drill sections 162 and 164 are designed for the thickness of sheet metal into which the screw is to be inserted.
  • the pilot section 162 must complete its bore wholly through the sheet metal before the tapered section 168 contact the pilot bora Further the large diameter section 164 must also be wholly through the sheet metal before the thread engages the larger diameter bore.
  • the stepped drill bit arrangement Is best utilised on larger diameter screws, say, of the order of 7mm to 10 mm, whereas such a step formation would not be required on the small diameter screws.
  • the orientation of the recess 111 can be designed into the head 106 so that alignment occurs between the shaped recess 80 and the driving end 28. However if there were to be variations in orientation between manufacturers or screw types then adjustability for this can be produced In the following ways. [0138] If desired, the same device 10 can be provided with additional slots 64 to effect a rotation or alignment of the tri-lobal shaped recess 80 with respect to the tool bit 28, to take into account different angular arrangements of the drive formations 111 on the screw heads with respect to the lobal locations. Other adjustment mechanisms, whether they produce a continuous adjustment or an indexed adjustment of the alignment of the screw holder 12 relative to the outer housing 30 can be provided to allow the device to be adapted to suit other screw configurations.
  • FIG 43 Illustrated In Figure 43 is a screw holder body 121 which can be utilised with either of the devices of Figures 1 or 12.
  • the body 121 differs from the body 12 or 121 of Figures 2 and 12 in that in addition to three slots 84 which are 120 degrees spaced from each other, at a location of approximately 30 degree angular spacing are slots 65 which are also each spaced at 120 degrees with respect to each other.
  • the slots 65 can be provided so that an operator, by removing the band 74 can change, the angular alignment of the body 121 relative to the outer housing 30, so that for example screws having a different angular alignment between the drive formation 111 and the screw head alignment can be utilised with the screw holding and driving device.
  • FIG 44 Illustrated in Figure 44 is an exploded perspective view of a screw holder body 121 and an outer housing 30 wherein the projections 68 of Figures 2 and 12 are replaced by a forward band of anally directed splines 681 and a rearward band of axially directed splines 682 which are separated by a circumferential channel 683.
  • the splines 881 and 682 are the same in number and are aligned, so that troughs of one align with troughs in the other.
  • the internal diameter of the body 121 has a series of mating splines 684 and an aperture 685 and grub screw 886 to go therein.
  • the aperture 685 wHI be located over the channel 683 thus allowing the grub screw 688 to be inserted into the aperture 885 and into the channel 683, in order to lock the body 121 and housing 30 together.
  • an indexed adjustment of the body 121 relative to the housing 30 can be provided which will allow torque to be driven, if required, via the housing 30 through to the body 121.
  • rearward axial forces will be transmitted from the housing 30 to the body 121 via the grub screw 686 and channel 683.
  • Axial forces in a forward direction will be transmitted through the shoulder 687 of the housing 30 and the rim 688 of the body 121.
  • Illustrated in Figure 45 is a rear perspective view of a body 121 and housing 30 which has a clamping system on the body 121 provided by means of two axial side, slots 889 and clamping screws 670 which damp the two halves of the rear of the body 121 to the reduced diameter portion 70 on the housing 30. By this mechanism minute changes in angular orientation of the body 121 relative to the housing 30 can be made.
  • Illustrated in figure 46 is a perspective view of a screw 14 and a screw holder 12 which is similar to the screw holder of figure 2 with some differences. The first difference is that the channel 90 is a circular channel which does not include a detent 92 which is shown in the difference between Figures 49 and 50, and further explained below.
  • FIG. 47 Illustrated in Figure 47 is another screw holder 12 and screw 14. This is similar in construction to that of Figure 46 except that the dimples 91 and 93 are not utilised. Similarly, the screw head 14, via the lobes is able to freely rotate inside the channel 90 once located therein. However, a groove or marking 141 on the side of the head of the screw 14 is provided so as to enable an operator to align this groove or marking 141 with a groove or marking 142 on the outer rim of the screw holder 12.
  • Figure 49 Illustrated in Figure 49 is a front view of the shaped recese 80 and detent 92 shown In hidden detail as well as channels 90 of the screw holder 12 of Figures 1 and 2.
  • Figure 50 is provided which illustrates the circular nature of the channel 90 which does not have the detent 92 of the screw holder 12 of Figure 47 and Figure 46 (without the dimple 93 being visible).
  • FIG. 48 and 51 Illustrated In Figures 48 and 51 is a four apex or vertex shaped recess 80 which has associated channel portions 90 into which the apexes or vertices of the screw 14 can be rotated. Detents 92 are provided so that the screw head will not be rotated past its alignment orientation. While only one multiple apex or vertex shaped recess 80 and screw 14 have been Illustrated it will be understood that other numbers of vertices or apexes, such as 2, 3, 5 or 6 or more, could be utilised.
  • An advantage of providing a three identical tobed shaped recess 80 with a ' matching three identical lobed screw head 106 and a multiple of three (namely 8) sided drive recess 111 and drive bit 28 is that the screw can enter into the shaped recess 80 without any need to be cognisant of the orientation. That is, any of the three possible orientations will work and this Improves the user friendliness of the system. However in some cases it might be desirable to instead utilise a two sided driver bit 28 with a three lobed screw head and In this instance there is only one orientation which the three lobed screw head can enter into the matching shaped recess 80 and be rotated to be correctly aligned to receive the driver bit.
  • Illustrated in figure 52 is a perspective view of a Torx-Post drive screw having a helically shaped formation on a rounded head, which would engage a matching shaped thread formation on the screw holder 12 as Illustrated in figure 53, and effectively forms a helical channel thereby associated with an aperture on a screw holder 12.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

La présente invention porte sur un outil de retenue et d'entraînement de vis (10) possédant une extrémité d'entraînement (16) et une extrémité de retenue de vis (12), ladite extrémité de retenue de vis (12) comprenant un porte-vis (12) ayant une cavité en forme (80) destinée à recevoir la tête d'une vis (106), ladite cavité en forme (80) étant conformée de telle sorte que ladite vis (14) peut entrer dans ladite cavité en forme (80) et, qu'une fois entrée, on puisse la tourner dans et par rapport à ladite extrémité de retenue de vis (12) pour la placer dans au moins un endroit où la vis (14) ne peut pas sortir axialement de la cavité en forme (80).
PCT/AU2011/000435 2011-04-15 2011-04-15 Dispositif de retenue et d'entraînement de vis WO2012139150A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/AU2011/000435 WO2012139150A1 (fr) 2011-04-15 2011-04-15 Dispositif de retenue et d'entraînement de vis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/AU2011/000435 WO2012139150A1 (fr) 2011-04-15 2011-04-15 Dispositif de retenue et d'entraînement de vis

Publications (1)

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WO2012139150A1 true WO2012139150A1 (fr) 2012-10-18

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3058665A1 (fr) * 2016-11-15 2018-05-18 Renault S.A.S. Systeme de reglage et/ou de serrage d'un objet dans un vehicule
JP2021006357A (ja) * 2019-06-28 2021-01-21 株式会社イチネンＭｔｍ 回転工具用ソケット

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6148699A (en) * 1997-08-26 2000-11-21 Han; Ki Su Screwdriver and screw
US6240811B1 (en) * 1997-03-26 2001-06-05 Sfs Industrie Holding Ag Screwing element
US20100269641A1 (en) * 2009-04-28 2010-10-28 Ho-Tien Chen Screw locking tool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6240811B1 (en) * 1997-03-26 2001-06-05 Sfs Industrie Holding Ag Screwing element
US6148699A (en) * 1997-08-26 2000-11-21 Han; Ki Su Screwdriver and screw
US20100269641A1 (en) * 2009-04-28 2010-10-28 Ho-Tien Chen Screw locking tool

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3058665A1 (fr) * 2016-11-15 2018-05-18 Renault S.A.S. Systeme de reglage et/ou de serrage d'un objet dans un vehicule
JP2021006357A (ja) * 2019-06-28 2021-01-21 株式会社イチネンＭｔｍ 回転工具用ソケット
JP7330780B2 (ja) 2019-06-28 2023-08-22 株式会社イチネンアクセス 回転工具用ソケット

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