WO1998017923A1 - Vis, lame de tournevis et emboutisseur destine a la fabrication de vis - Google Patents
Vis, lame de tournevis et emboutisseur destine a la fabrication de vis Download PDFInfo
- Publication number
- WO1998017923A1 WO1998017923A1 PCT/JP1997/002237 JP9702237W WO9817923A1 WO 1998017923 A1 WO1998017923 A1 WO 1998017923A1 JP 9702237 W JP9702237 W JP 9702237W WO 9817923 A1 WO9817923 A1 WO 9817923A1
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- WIPO (PCT)
- Prior art keywords
- screw
- groove
- bit
- center
- fitting groove
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 235000015418 Bacopa monnieria Nutrition 0.000 claims description 30
- 244000187129 Bacopa monnieria Species 0.000 claims description 30
- 230000001154 acute effect Effects 0.000 claims description 13
- 241000755266 Kathetostoma giganteum Species 0.000 claims description 5
- 229910001369 Brass Inorganic materials 0.000 claims description 2
- 239000010951 brass Substances 0.000 claims description 2
- 238000009428 plumbing Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 7
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000013011 mating Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a 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
- B25B15/00—Screwdrivers
- B25B15/001—Screwdrivers characterised by material or shape of the tool bit
- B25B15/004—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
- B25B15/005—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section with cross- or star-shaped cross-section
-
- 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
- B25B15/00—Screwdrivers
- B25B15/001—Screwdrivers characterised by material or shape of the tool bit
- B25B15/004—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
- B25B15/007—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section with blade of flat or substantially flat cross-section
-
- 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
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0007—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool
- F16B23/0023—Specially shaped nuts or heads of bolts or screws for rotations by a tool characterised by the shape of the recess or the protrusion engaging the tool substantially cross-shaped
-
- 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
- F16B23/00—Specially shaped nuts or heads of bolts or screws for rotations by a tool
- F16B23/0092—Specially shaped nuts or heads of bolts or screws for rotations by a tool with a head engageable by two or more different tools
Definitions
- the present invention relates to a screw and a driver bit applied to the screw, and particularly to a screwdriver and a driver bit.
- the present invention relates to a screw provided with a bit fitting groove that can be adapted to each driver bit, and a driver bit applied to the screw, and a cross groove formed in the head of the screw and a driver bit adapted to this. Screws and screwdrivers that can fast and surely achieve screw mounting and removal with proper torque transmission by tightly fitting with screws and screwdrivers as well as screw manufacturing header punches It is.
- FIGS. 29 to 32 a combination of a general screw and a driver bit is known to be configured as shown in FIGS. 29 to 32. That is, FIGS. Shows a conventional screw having a cross groove, FIG. 31 shows a driver bit for the cross groove screw, and FIG. 32 shows a fitting state between the screw and a driver bit. .
- the conventional screw 10 shown in FIG. 29 is provided with a cross groove 12 in the screw head 10a.
- Each of the cross grooves 12 is formed such that a certain inclined groove portion 12a is formed to extend from the edge portion toward the center portion of the screw neck portion 12b, and a gradually inclined substantially conical portion is formed at the bottom thereof.
- the bottom surface 14 is formed.
- Reference numeral 13 indicates a taper side wall formed between the adjacent cross grooves 12 respectively. That is, the taper side wall portion 13 abuts and engages with a blade portion of a driver bit described later. Further, adjacent corners of the respective inclined groove portions 12a have tapered connecting surfaces extending from the position of the conical bottom surface 14 to the opening edge of the cross groove 12 of the screw head 10a.
- FIG conventional driver-bit Bok 2 0 shown in 1 the blade unit 2 2 which fits into the cross groove 1 2 of the screw 1 0 with each comprise, Tan ⁇ of the cross groove 1 2
- the extended blades 22a are formed to extend to fit the shape of the inclined grooves 12a extending toward the center of the screw neck 12b.
- Reference numeral 23 denotes a taper side wall portion formed on both side surfaces of each of the blade portions 22 to the extended blade portion 22a. That is, the taper side wall portion 23 is strongly engaged with the tapered side wall portion 13 formed in the cross groove 12 of the screw 10 described above.
- FIGS. 33 and 34 As a screw provided with a fitting groove which can be fitted to a Phillips screwdriver bit and a flat screwdriver bit, for example, a Bramy screw 10 configured as shown in FIGS. 33 and 34 is known. ing. A plus driver bit 20 configured as shown in FIG. 31 is used as one driver bit applicable to such a Bramy screw 10. Further, FIG. 35 shows a fitting state of the Bramy screw 10 and the Phillips screwdriver bit 20.
- the Bramy screw 10 has an advantage that a generally known minus dryno-bit can be used.
- the conventional Bramai screw 10 shown in FIGS. 33 and 34 has a fitting groove 12 formed of a cross groove in the screw head 10a.
- the fitting groove 12 is composed of a pair of linear grooves 12 a and 12 b crossing each other at the center of the screw head 10 a in a cross shape, and one of the linear grooves 12 a is a Phillips screwdriver bit. Abuts and engages with blade
- the other straight groove 12b is configured to be in contact with the blade portion of a flathead screwdriver bit.
- the one straight groove 12a is formed as an inclined groove 12a which is inclined from the edge to the center of the screw neck 10b, and has a slightly inclined bottom at its bottom.
- the conical bottom surface 14 is formed.
- a tapered side wall 13a having a taper is formed on both sides of the inclined groove portion 12a toward the bottom.
- the tapered side wall 13a has a Phillips screwdriver described later. Abuts and engages with the bit blade.
- the other straight groove 12b is formed to extend as a horizontal groove (12a) having a width and a depth sufficient to make contact with the blade of the flathead screwdriver bit. Then, on both side surfaces of the horizontal groove portion 12a, vertical side wall portions 13b substantially perpendicular to the bottom are formed, and a known negative driver bit is formed in the vertical side wall portion 13b. Abuts and engages with the blade portion.
- a conventional Phillips screwdriver bit 20 shown in FIG. 31 includes blade portions 22 that are fitted into the fitting grooves 12 of the Bramy screws 10, respectively, and includes an end of the fitting grooves 12.
- Reference numeral 23 denotes a tapered side wall formed on both side surfaces of the blades 22 to the extended blades 22a. That is, the taper side wall portion 23 comes into contact with and engages with the taper side wall portion 13 a formed in the one inclined groove portion 12 a of the fitting groove 12 of the Bramy screw 10 described above. .
- the cross groove 12 of the screw head 10 a is formed with a fixed inclined groove 12 a directed from the edge to the center of the screw neck 10 b.
- the corresponding driver bit 20 has a ridge line portion of the extension blade portion 22 a that conforms to the shape of the inclined groove portion 12 a and is formed in the cross groove (fitting groove) 12.
- the extended blade portion 22a is fitted, and the ridge portion of the extended blade portion 22a is formed gradually wider toward the rear from the tip.
- the tapered side wall portion 23 formed on each blade portion 2 of the driver bit 20 also has a taper formed on the cross groove 12 (inclined groove portion 12 a) of the screw (Bramie screw) 10.
- the driver bit 20 When the driver bit 20 is rotated in a predetermined direction to abut and engage the side wall portion 13, the driver bit 20 and the cross groove 12 (inclined groove portion 12a) are formed.
- the contact contact state of the driver bit 20 can be said to be entirely taper contact, so the tip of the driver bit 20 protrudes outward along the inclined surface of the inclined groove portion 12 a of the cross groove 12. If this is done (indicated by the arrow in FIG. 32), a so-called camouflage phenomenon occurs.
- the shape of the cross groove (fitting groove) of the conventional screw is designed to facilitate the fitting of the tip blade of the driver bit 20 as shown in Fig. 30 (Fig. 34).
- the groove width of the cross groove (fitting groove) 12 is formed to be relatively larger than, for example, the width of the ridge portion of the extended blade portion 22 a of the driver bit 20, while the adjacent cross grooves 1 2 and 1 2 are formed.
- the area of 17a and 17b is relatively small.
- the taper side wall 13 (and the vertical side wall 13 b) and the taper coupling surfaces 17 a and 17 b are very large during the rotation operation of the driver bit 20.
- the tapered side wall portion 13 (and the vertical side wall portion 13b) and the tapered connecting surfaces 17a and 17b are gradually damaged. Therefore, when the damaged portion (15) is enlarged, the cam-out phenomenon of the driver 1 bit 2 ° becomes frequent, and finally the screw tightening operation becomes impossible.
- the occurrence of the above-mentioned cam-out phenomenon hastens the wear of the bit tip portion, that is, the blade portion 22 and the extended blade portion 22a, and the wear further promotes the occurrence of the cam-out phenomenon. As a result, the damage of the thread groove also increases.
- an object of the present invention is to effectively prevent the cam bit phenomenon of the driver bit by improving the configuration of the groove portion in the cross groove of the screw in the combination of the screw and the driver bit, and to prevent the screw bit as in the conventional case.
- An object of the present invention is to provide a header punch.
- Another object of the present invention is to improve the configuration of the groove in the bit fitting groove of the screw in the combination of the Brahma screw and the driver bit, thereby effectively reducing the cam bit phenomenon of the driver bit.
- the present invention provides a combination of a Bramai screw and a driver bit that can be used together with a header and a screw punch for screw manufacturing.
- the screw according to the first invention of the present invention is a screw head bit.
- a substantially vertical end wall having a predetermined depth is formed at the end of the fitting groove, and a non-planar bottom is formed by projecting from the lower edge of the vertical end wall toward the center of the screw head. And these non-planar
- Each of the inclined grooves is formed so as to be directed toward the center of the screw neck portion from the raised portion of the portion, and a substantially conical bottom surface is formed at the bottom thereof.
- the lower groove is fitted into the bit fitting groove and the lower edge is formed. It is characterized in that a bit fitting groove that fits a driver bit having a blade portion configured to contact the non-planar bottom portion is provided.
- the bit fitting groove into which the blade portion of a Phillips screwdriver fits is formed as a substantially divergent groove extending radially outward from the center of the screw head.
- the opening angle of the opposing side wall of each groove can be configured to be slightly more acute than a right angle.
- the driver bit that fits the screw has a flat blade portion having a substantially vertical edge portion that fits along the vertical end wall portion of the bit fitting groove of the screw head at the tip end, It is characterized in that the tip surface of this blade portion is substantially horizontal and a projection is provided at the center thereof.
- the bit fitting groove of the screw is formed as a bit fitting groove into which the blade portion of a Phillips screwdriver fits, and each of the screw fitting grooves is almost flared and bent, a screwdriver fitting with this screw is formed.
- the bit has a configuration in which both side wall portions at the tip of the flat blade portion are adapted to be substantially divergent grooves forming the bit fitting groove of the screw.
- an edge portion which intersects with the horizontal surface portion at the tip of the blade portion is projected at a right angle or a young thousand horizontal surface portion side to form an acute angle.
- the projection formed at the center of the horizontal tip surface of the flat blade portion is formed to have a shape adapted to the inclined groove formed at the center of the bit fitting groove of the screw and the conical bottom surface, respectively. Can be.
- the header and the punch for manufacturing the screw form a vertical end wall of the bit fitting groove of the screw head and are directed toward the center of the screw head from the lower edge of the vertical end wall. Projections forming non-planar bottoms that are protruded and raised, and protruding ridges that form inclined or curved grooves that extend from these projections toward the center of the screw neck are provided. Features.
- the side wall portions of the projecting pieces forming the bit fitting grooves are formed in a shape suitable for the substantially divergent grooves. It is preferable to do so.
- a substantially vertical end wall having a predetermined depth is formed at the edge of the bit fitting groove of the screw head, and the vertical end wall is formed.
- Forming a non-planar bottom raised from the lower edge of the part toward the center of the screw head By forming the inclined grooves from the raised part of the non-planar bottom toward the center of the screw neck part, the bit fitting is performed when the tip of the blade part of one driver bit and the bit fitting groove are fitted.
- the taper contact area with the entire mating groove is partially and reduced, and the area of the side wall where the tip of the driver bit abuts at the boundary where the adjacent bit fitting groove intersects is enlarged.
- the driver bit according to the first aspect of the present invention includes a flat blade portion having a substantially vertical edge portion which is fitted at a tip portion along a vertical end wall portion of a bit fitting groove of a screw head.
- the tip most suitable for the screw can be obtained by making the distal end surface of the blade portion a substantially horizontal surface and providing a projection at the center thereof.
- the screw according to the first invention can be easily manufactured by using a header punch provided with a projection and a ridge adapted to the shape of each of the bit fitting grooves. .
- a bit fitting groove formed of a cruciform groove is provided in the screw head, and one straight groove intersecting the bit fitting groove is formed by a plus driver bit.
- the blade of the Phillips screwdriver is formed in such a manner that the blade portion of the flat screwdriver is formed so that the blade portion of the flat driver is fitted and the other straight groove is formed so that the blade portion of the minus driver bit is fitted and fitted.
- a substantially vertical end wall portion having a predetermined depth is formed at the edge of one of the straight grooves into which the portion fits, and when the tip of the blade portion of the Phillips screwdriver bit is fitted to the bit fitting groove, A bit fitting groove is formed so as to fit into a driver bit having a blade portion configured to fit into one of the linear grooves and to have a lower edge portion abutting on the groove bottom portion. .
- the groove bottom of one of the straight grooves into which the blade portion of the Phillips screwdriver fits fits is directed toward the center of the screw head from the lower edge of the vertical end wall formed at the edge.
- an inclined groove can be formed, and a substantially circular bottom can be formed at the center bottom.
- the groove bottom of the one straight groove is formed as a non-planar bottom protruding from the lower edge of the vertical end wall formed at the edge thereof toward the center of the screw head. Form a sloped groove from the ridge at the bottom of the plane toward the center of the screw head. In addition, a substantially conical bottom surface can be formed at the center bottom.
- the groove bottom of the one straight groove is formed as an inclined bottom inclined downward from the lower edge of the vertical end wall formed at the edge to the center of the screw head. May form a substantially conical bottom surface at the center bottom of the.
- the bit fitting groove into which the blade portion of the Phillips screwdriver fits is formed by forming one straight groove as a substantially divergent groove extending radially outward from the center of the screw head. And in the other linear groove, a groove whose width is directed radially outward from the center portion of the screw head and is substantially divergent is formed, and opposing side wall portions of the adjacent grooves are formed. Can be configured so that the opening angle is slightly more acute than a right angle.
- a screwdriver bit that is compatible with the Bramai screw is provided with a flat blade portion having a substantially vertical edge portion that fits along the vertical end wall portion of one of the straight grooves of the screw head at the tip portion.
- the tip surface of the blade portion is substantially horizontal, and a projection is provided at the center thereof.
- a single driver bit suitable for the Bramie screw includes the Bramae screw with both side walls at the tip of the flat blade portion. It is preferable to form the bit fitting groove into a shape that is compatible with the substantially divergent groove.
- both edge portions of the flat blade portion are formed at an acute angle by protruding an edge portion intersecting the horizontal surface portion at the tip of the blade portion at a right angle or slightly toward the horizontal surface portion.
- the projection formed at the center of the horizontal tip surface of the flat blade portion is adapted to the inclined groove and the cone bottom formed at the center of the bit fitting groove of the Bramie screw. It is preferable to configure the shape in such a way that
- a header and a punch for manufacturing the Brahmi screw form a vertical end wall of a bit fitting groove of the screw head and a center of the screw head from a lower edge of the vertical end wall.
- the bit fitting grooves of the screw are formed as substantially divergent grooves, respectively, the side wall portions of the projecting pieces forming the bit fitting grooves are formed in a shape suitable for the substantially divergent groove. It is preferable to do so.
- a substantially vertical end wall having a predetermined depth is provided at the edge of the bit fitting groove formed of one of the straight grooves of the screw head.
- the driver bit according to the second aspect of the present invention has a substantially vertical edge portion which is fitted along a vertical end wall portion of a bit fitting groove formed of one straight groove of a screw head at a tip portion.
- the distal end surface of the blade portion is substantially horizontal, and a projection is provided at the center thereof, the most suitable one can be obtained.
- the Bramy screw according to the second invention uses a header punch provided with a projection piece and a ridge adapted to the shape of each of the bit fitting grooves, particularly the shape of one of the linear grooves. Then, it can be easily manufactured.
- the driver bit for a Bramai screw according to the third invention of the present invention is formed by a pair of linear grooves consisting of an inclined groove part and a horizontal groove part which cross in a crisscross manner at the center of the screw head.
- a flat blade having an inclined edge formed to fit along the inclined groove of the Bramie screw is provided.
- a flat blade portion which extends at a substantially right angle to intersect at right angles and fits along the horizontal groove of the Bramai screw and forms a horizontal edge contacting the groove bottom surface of the horizontal groove; It is characterized in that a projection is provided at the center of the tip of the blade portion, which fits into the bottom of the cone provided at the center of the screw head of the Bramai screw.
- the projection formed at the center of the tip of each of the flat blades has a shape adapted to the groove formed at the center of the bit fitting groove of the Brahma screw and the bottom of the cone. Can be configured.
- FIG. 1 is a cross-sectional side view of an essential part showing an embodiment of a screw according to the present invention
- FIG. 2 is a plan view of the head of the screw shown in FIG. 1,
- FIG. 3 is a cross-sectional side view of an essential part showing another embodiment of the screw according to the present invention.
- FIG. 4 is a side view of an essential part showing one embodiment of a driver bit according to the present invention.
- FIG. 5 is a sectional side view of an essential part showing a modification of the driver bit shown in FIG.
- the figure is a cross-sectional explanatory view of the main part, showing the coupling state with a driver bit that fits the screw shown in FIG. 3,
- FIG. 7 is a cross-sectional side view of an essential part showing a coupling state between the screw shown in FIG. 1 and a driver bit shown in FIG. 4,
- FIG. 8 is a cross-sectional side view of a main part showing a modification of the state of connection between the screw shown in FIG. 1 and the driver bit shown in FIG.
- FIG. 9 is a cross-sectional side view of a main part showing another embodiment of the screw according to the present invention.
- FIG. 10 is a cross-sectional side view of a main part showing still another embodiment of the screw according to the present invention.
- FIG. 11 is a screw manufacturing header for forming the head of the screw shown in FIG. Side view of the main part of the punch,
- FIG. 12 is a side view of a main part of a screw manufacturing header punch for forming the screw head shown in FIG. 9,
- FIG. 13 is a plan view of a screw head showing an embodiment of the Bramai screw according to the present invention
- FIG. 14 is a cross-sectional side view of a main part of the Bramai screw shown in FIG.
- FIG. 15 is a cross-sectional side view of an essential part showing a modification of the Brahmi screw in FIG. 14,
- FIG. 16 is a head plan view of the screw showing another embodiment of the Brahmi screw according to the present invention.
- Figure, Figure 17 shows the ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ — XVI 1 line cross section of the main part Figure,
- FIG. 18 is a plan view of a screw head showing still another embodiment of the Bramai screw according to the present invention.
- FIG. 19 is a side view of an essential part showing an embodiment of a driver bit suitable for a Bramai screw according to the present invention.
- FIG. 20 is a cross-sectional side view of an essential part showing a modified example of the driver bit shown in FIG. 19, and FIG. 21 is a diagram showing a Bramai screw shown in FIG. 15 and a driver bit shown in FIG. Main part cross-sectional side view showing the connection state with the
- FIG. 22 is an explanatory plan view of a main part of the screw head, showing the binding state of the driver bit shown in FIG. 19 in the Brahmi screw head shown in FIG. 13;
- FIG. 23 is an explanatory cross-sectional view of a main part showing a bonding state with a driver bit that is compatible with the Bramai screw shown in FIG. 18;
- FIG. 24 are the front view, the left side view and the plan view of the main part of the main part of the screw manufacturing header punch for forming the head of the Bramai screw shown in FIG. (A) and (b) of FIG. 5 are a front side view and a left side view of an essential part of another embodiment of a Bramai screw driver bit according to the present invention
- FIG. 26 is a side view of a main part showing a modified example of the driver bit for the Bramai screw shown in FIG. 25.
- FIGS. 27 (a) and (b) show the connection state between the one bit of the screwdriver for Brahmi screw shown in FIG. 25 and the conventional Brahmi screw shown in FIGS. 33 and 34.
- Fig. 28 is an explanatory plan view of the head of the Brahmi screw showing the connection between the Brahmi screw driver bit and the Brahmi screw shown in Fig. 27;
- Fig. 29 is a cross-sectional side view of the main part of a conventional cross groove screw
- FIG. 30 is a plan view of the head of the cross groove screw shown in FIG. 29,
- Fig. 31 is a side view of the main part of a conventional driver bit for a cross groove screw.
- FIG. 32 is a cross-sectional side view of an essential part showing a connection state between the screw shown in FIG. 29 and the driver bit shown in FIG. 31;
- Fig. 33 is a sectional side view of the main part of a conventional Bramai screw
- Fig. 34 is a plan view of the head of the Bramai screw shown in Fig. 33
- FIG. 35 is a cross-sectional side view of an essential part showing a coupling state of the Bramai screw shown in FIG. 33 and the driver bit shown in FIG. 31.
- FIGS. 1 and 2 show one embodiment of the screw according to the present invention. That is, in FIGS. 1 and 2, reference numeral 30 denotes a screw according to the present invention, and a bit fitting groove 32 is provided in a head 30a of the screw 30.
- the bit fitting groove 32 is provided at the center of the screw head 30a so as to be orthogonal to a plus (+) shape.
- the bit fitting groove 32 forms a vertical end wall 32a of a predetermined depth at its edge, and is screwed from the lower edge 32a 'of the end wall 32a.
- the head 30a is raised toward the center of the head 30a to form a non-planar bottom 32b.
- the center of the screw neck 30b is formed.
- the inclined grooves 32c are respectively formed in such a manner that they are directed toward the bottom, and the substantially conical bottom surface 34 having a gentle inclination is formed at the bottom thereof.
- the reference numeral 33 denotes a substantially vertical side wall of about 1.5 ° to 2 ° as an appropriate taper (angle at which the header punch is removed) formed between the adjacent bit fitting grooves 32. Indicates a part. Therefore, the side wall portion 33 comes into contact with and engages with a side wall portion of the blade portion of the driver bit described later.
- the bit fitting at the screw head 30 a is performed from the position of the conical bottom surface 34, similarly to the conventional cross groove screw shown in FIG. 30.
- Tapered connecting surfaces 37a and 37b are formed to extend to the opening edge of the mating groove 32, respectively.
- the screw 30 in the present embodiment has the bit fitting groove 3 of the screw head 30a. 2 are provided with non-planar bottoms 3 2 b at the edges thereof, and the inclined grooves 3 2 c are respectively directed from the protrusions 3 2 b ′ of the non-planar bottoms 3 2 b ′ toward the center of the screw neck 30 b.
- the tapered contact area with respect to the entire bit fitting groove 32 is partially and reduced by extending the groove, and at the boundary between the adjacent bit fitting grooves 32, 32.
- the area of the side wall portion 33 where the tip of the driver bit abuts (the area of the surface on which the driver bit applies rotational driving force to the screw, ie, the area of the driving surface) can be increased.
- the width of the bit fitting groove 32 is configured to be adapted to the thickness of the blade portion of the driver bit, which will be described later. It is preferable to have a slightly wider configuration.
- FIG. 3 shows another embodiment of the screw 30 according to the present invention. That is, in the present embodiment, in the side wall 33 facing the bit fitting groove 32 of the screw 30, the groove width is directed outward from the center of the screw head 30 a in the radial direction.
- the grooves 33a and 33b are formed so as to be substantially divergent.
- the opening angle / 3 of the opposing side wall of each adjacent groove is made a right angle. (90 °) is set so as to be slightly more acute, and in combination with a driver bit to be described later, it is possible to effectively prevent a cam angle phenomenon from the bit fitting groove 32 of the screw 30. .
- FIG. 4 shows an embodiment of a driver bit 40 suitable for the screw 30 according to the embodiment shown in FIGS. That is, the driver bit 40 of the present embodiment is fitted into the bit fitting groove 32 of the screw 30 and has a vertical end wall formed at the end of the bit fitting groove 32.
- Each of the bit fitting grooves 32 includes a flat blade portion 42 having a horizontal surface portion 42 a extending substantially perpendicularly and engaging with the non-planar bottom portion 32 b.
- Protrusions 4 2 respectively, so as to conform to the shape of the inclined grooves 3 2 c formed toward the center of the screw neck 30 b from the raised portions 3 2 b ′ of the non-planar bottom 3 2 b Is made to protrude.
- Reference numeral 43 denotes a substantially vertical side wall portion formed on both side surfaces of each of the flat blade portion 42 and the horizontal surface portion 42a and capable of allowing a slight taper. Therefore, the side wall portion 43 abuts and engages with the side wall portion 33 formed in the bit fitting groove 32 of the screw 30 in the above-described embodiment. Therefore, the engagement of these drive surfaces can provide a sufficient size of the engagement area, so that it is possible to effectively prevent the cam rattling phenomenon that has occurred in the conventional combination of a screw and a driver bit. It becomes possible.
- tapered connecting surfaces 37a and 37b are formed at the corners adjacent to the bit fitting groove 32, similarly to the conventional cross groove screw.
- the blade bit of the driver bit can be formed on these tapered coupling surfaces 37a and 37b. O Partially abuts and joins to achieve screw tightening o
- FIG. 5 shows a modified example of the driver bit 40 shown in FIG. 4 described above.
- the driver bit 40 of the above-described embodiment is provided at both ends 42 a ′ of the flat blade portion 42.
- the edge that intersects with the horizontal surface portion 42a at the tip of the blade portion is formed at an acute angle by protruding from the right angle toward the horizontal surface portion 42a, and the protrusion 42b is vertically extended vertically. It is configured as a protrusion 42c. That is, in the driver bit 40 of the present embodiment, by forming the vertical projections 42 c, this portion is formed by the inclined groove portion 32 of the bit fitting groove 32 of the screw 30 in the above-described embodiment. The taper does not contact c. By configuring the driver bit 40 in this way, it is possible to more reliably prevent the camout phenomenon from occurring.
- FIG. 6 shows an embodiment of the driver bit 40 that is particularly suitable for the screw 30 according to the embodiment shown in FIG.
- the basic configuration of the driver bit 40 is the same as that of the embodiment shown in FIG. 4 or FIG.
- a driver bit 40 applied to the screw 30 formed so that the bit width of the bit fitting groove 32 becomes substantially divergent grooves 33a and 33b is as follows.
- the side wall portion 43 at the front end of the flat blade portion 42 matches the flared groove 33a, 33b, respectively. If it is configured as a flared side wall portion 43a, 43b, the blade portion 42 of the driver bit 40 and each side wall portion of the bit fitting groove 32 of the screw 30 are formed.
- the clearance between the grooves 33a, 33b and the side wall portions 43a, 43b can be made as small as possible, and a proper bit fitting with a screw can be achieved.
- the bit fitting in which the blade portion 42 of the driver bit 40 and the flared grooves 33 a, 33 b of the screw 30 are formed.
- the opening angle / 3 of the opposing side wall of each adjacent groove is a right angle ( By setting the angle to be slightly more acute than 90 °), balanced torque transmission can be achieved.
- the torque ⁇ acting on each of the side wall portions (Tl, T 2, T 3, T 4) is changed to the screw head 30 on which the blade portion 42 of the driver bit 40 acts. Since the tangential direction of a can be directed toward the screw neck rather than G, the force mull phenomenon can be effectively prevented. This is the same when the driver bit 40 shown in FIGS. 4 and 5 or the conventional driver bit 20 shown in FIG. 31 is used.
- FIG. 7 shows a fitting operation of the screw 30 (see FIG. 1) and the driver bit 40 (see FIG. 3) according to the embodiment. That is, according to the present embodiment, the horizontal surface portion 42 a and the protrusion 42 b formed on the flat blade portion 42 of the driver bit 40 are respectively fitted to the bit fitting groove 3 of the screw 30. 2 into the non-planar bottom part 3 2b and the inclined groove part 3 2c, and the side walls 43 of the blades 42 and the protrusions 42 b are formed into the side walls of the bit fitting groove 32 of the screw 30. A predetermined torque can be transmitted to the screw 30 by rotating the driver bit 40 in contact with the part 33.
- the non-planar bottom part 32 b is formed in the bit fitting groove 32 of the screw 30, so that when the driver bit 40 is fitted, the driver bit 40 is formed.
- the contact area of the side wall portion 33 contacting the side wall portion 4 3 of the flat blade portion 42 can be increased, and the inclined groove portion 3 2 c of the bit fitting groove 32 of the screw 30 and the driver bit can be increased. Since the tapered contact area where the projections 42b of the contact 40 comes into contact with the projections 42b is partial and small, the cam screw phenomenon that has occurred in the conventional combination of a screw and a driver bit has been eliminated. It can be reliably prevented.
- FIG. 8 shows a modification of the fitting operation between the screw 30 and the driver bit 40 shown in FIG. That is, in the present embodiment, the flat portion of the driver bit 40 (bit axis) has a required inclination angle S on the screw axis of the bit fitting groove 32 of the screw head 30a. The blade portions 42 are fitted together. According to the present invention, even in such a fitting operation between the screw 30 and the driver bit 40, the screw 3 is rotated by rotating the driver bit 40 in the same manner as in the above-described embodiment. A predetermined torque can be transmitted to 0.
- FIG. 9 shows another embodiment of the screw according to the present invention.
- the same components as those of the screw of the embodiment shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted. That is, in the present embodiment, the present invention is applied to a screw with a screw head 30a having a pan head shape instead of the dish head screw 30a shown in FIG.
- the lower end of the vertical end wall 32a formed at the end of the bit fitting groove 32 in the screw 30 in this embodiment is set to be shallower than the embodiment shown in FIG. , From the lower edge to the center of the screw head 30a, forming a sloped portion 32a 2 that slopes downward first, and then form a raised portion 32b '. It was done.
- the other configuration is basically the same as the screw of the embodiment shown in FIG.
- FIG. 10 shows still another embodiment of the screw according to the present invention.
- the screw 30 in this embodiment has a screw head 30 a similar to the embodiment shown in FIG.
- the present invention is applied to a pan-shaped screw, and the upper edge of the vertical end wall 32 a formed at the edge of the bit fitting groove 32 is formed by a required taper 32. It is configured to open with d.
- the other configuration is basically the same as the screw of the embodiment shown in FIG.
- FIG. 11 shows an embodiment of a header-punch 50 for manufacturing the screw 30 in the embodiment shown in FIG. That is, the header-punch of the present embodiment
- Reference numeral 50 denotes stamping and forming of the bit fitting groove 32 in the screw head 30a of the screw 30 shown in FIG.
- the header punch 50 of this embodiment has a vertical end wall portion 32 a and a non-planar bottom portion 32 at the edge of the bit fitting groove 32 of the screw head 30 a.
- Projections 52 each having a raised edge portion 52a for the projection, and the projections 52 are provided with inclined grooves 32c extending toward the center of the screw neck portion 30b. It has a configuration in which inclined ridges 52b are formed.
- the header punch for manufacturing the screw 30 in the embodiment shown in FIG. 3 includes the bit fitting groove 3 in the configuration of the header punch 50 shown in FIG. 2, the side walls 5 3 of the projections 52 forming the grooves 3 3 a and 3 3 b are directed radially outward from the center of the projections 52, and become almost divergent. With such a wide configuration, the screw 30 in the embodiment shown in FIG. 3 can be easily manufactured.
- FIG. 12 shows an embodiment of a hoop punch for manufacturing the screw 30 of the embodiment shown in FIG.
- the header punch 50 in the present embodiment has a vertical end wall portion 32 a and a non-planar bottom portion 32 b at the end of the bit fitting groove 32 of the screw head portion 30a.
- Projecting pieces 52 each having a protruding part 52a "for forming a slanting groove part 32c extending toward the center of the screw neck part 30b. 5b.
- FIG. 13 and FIG. 14 show one embodiment of a Brahmi screw according to the present invention. That is, in FIGS. 13 and 14, reference numeral 60 indicates a Brahmi screw according to the present invention, and a bit fitting groove 62 is provided in a head 60 a of the Brahmi screw 60. .
- the bit fitting groove 62 is formed of a pair of straight grooves 62 a and 62 b crossing in a cross at the center of the screw head 60 a.
- the one straight groove 62 a forms a vertical end wall 63 a having a predetermined depth at the edge thereof.
- the groove bottom 6 3 b extending toward the center of the screw head 60 a from the lower edge 6 3 a ′ of 3 a forms a horizontal bottom, and then the screw from this horizontal bottom (6 3 b)
- Each of the grooves 60 3 c is formed so as to be directed toward the center of the neck portion 60 b, and an approximately conical bottom surface 64 having a gentle slope is formed at the center bottom.
- substantially vertical side wall portions 65a of about 1.5 ° to 2 ° are formed as a draft taper (the angle at which a header punches out). At the portion 65a, it comes into contact with the side wall portion of the blade portion of the Phillips screwdriver bit described later.
- the other straight groove 62b is formed to extend as a horizontal groove (62b) having a width and depth sufficient to make contact with the blade portion of a flathead screwdriver bit. .
- a taper pulser per header / punch
- a substantially vertical side wall 65 b of about 2 ° is formed. It comes into contact with the blade of the flathead screwdriver bit.
- the Brahmi screw 60 in the present embodiment has a vertical end wall 63a at the edge of one of the linear grooves 62a of the screw head 60a, and the groove bottom 63b.
- the inclined grooves 63c are respectively formed to extend from these horizontal bottom portions 63b toward the center of the screw neck portion 60b, so that the bit fitting grooves are formed.
- 6 Partial and small taper contact area with the entirety of the side wall, and moreover, the side wall portion where the leading end of one driver bit contacts one straight groove 62a of the bit fitting groove 62 facing the other.
- the area of 65 a (the area of the surface where one driver bit applies a rotational driving force to the screw, that is, the area of the driving surface) can be increased.
- the groove width of the one straight groove 62a is configured so as to be adapted to the thickness of the blade portion of a driver bit described later. It is preferable that the width is widened.
- FIG. 15 shows a modified example of the Brahmi screw 60 shown in FIGS. 13 and 14. That is, in the present embodiment, the groove bottom 63 b of one of the linear grooves 62 a of the bit fitting groove 62 is formed by the vertical end wall 63 a having a predetermined depth formed at the edge thereof. From the lower edge 6 3 a ′, it is raised toward the center of the screw head 60 a to raise the non-planar bottom.
- the taper contact area with respect to the entire bit fitting groove 62 is partially and reduced, and is opposed to each other.
- the area of the side wall portion 65a with which the tip of the driver bit comes into contact with one of the linear grooves 62a of the bit fitting groove 62 can be increased.
- FIGS. 16 and 17 show still another embodiment of the Brahmi screw 60 according to the present invention. That is, in the present embodiment, the groove bottom portion 63 b of one of the linear grooves 62 a of the bit fitting groove 62 is formed with a vertical end wall portion 63 a having a predetermined depth formed at the edge thereof. From the lower edge 6 3 a ′, it is inclined toward the center of the screw head 60 a to form an inclined bottom (63 b). It consists of the following configuration. Other configurations are the same as the Bramai screws 60 of the above embodiment. In the Bramy screws 60 of the present embodiment configured in this manner, as in the above embodiment, the entire bit fitting groove 62 is formed. The area of the side wall portion 65 a where the tip of one driver bit contacts one linear groove 62 a of the bit fitting groove 62 opposite to the taper contact area is partially and reduced. Can be expanded.
- FIG. 18 shows still another embodiment of the Bramai screw 60 according to the present invention. That is, in the present embodiment, in one linear groove 62 a and the other linear groove 62 b of the Bramai screw 60, the groove is directed radially outward from the center of the screw head 60 a.
- the grooves are formed so as to have substantially divergent grooves 62a 'and 62b', respectively.
- the opening angle of the opposing side wall of each adjacent groove is slightly larger than the right angle (90 °).
- FIG. 19 shows an embodiment of a driver bit 70 suitable for the Bramai screw 60 according to the embodiment shown in FIGS. 13 to 18. That is, the driver bit 70 of the present embodiment fits into the bit fitting groove 62 of the Bramie screw 60, and the edge of one straight groove 62 a of the bit fitting groove 62.
- a flat blade portion 72 having a horizontal surface portion 73a extending substantially at a right angle to be engaged with the vertical end wall portion 63 and the groove bottom portion 63b formed in the portion, respectively. 2 Configuration in which protrusions 7 3b are projected to fit the shape of the inclined groove 6 3c formed toward the center of the screw neck 60b from the groove bottom 6 3b of a. Consists of
- Reference numeral 75 denotes a substantially vertical side wall portion formed on both side surfaces of the flat blade portion 72 or the horizontal surface portion 73a and capable of allowing some taper. Therefore, the side wall portion 75 abuts and engages with the side wall portion 65a formed in one of the linear grooves 62a of the bit fitting groove 62 of the Bramie screw 60 in the above-described embodiment. Therefore, the engagement of these drive surfaces can provide a sufficient size of the engagement area, and thus effectively prevent the cam ratt phenomenon that has occurred in the conventional combination of a Brahmi screw and a driver bit. It becomes possible.
- the taper connection is formed at the corners of the linear grooves 62 a and 62 b adjacent to the bit fitting groove 62, similarly to the conventional Brahmi screw.
- 67 a and 67 b a part of the blade portion of one driver bit is abutted and connected, so that a screw tightening operation can be achieved.
- FIG. 20 shows a modified example of the driver bit 70 shown in FIG. 19 described above.
- the driver bit 70 shown in FIG. The edge that intersects with the horizontal surface portion 73a at the tip of the blade portion is formed at an acute angle by protruding from the right angle to the horizontal surface portion 73a side, and the vertical projection that extends the projection 73b vertically downward. 7 3 c. That is, the driver 1 bit of this embodiment
- FIG. 21 shows the fitting operation of the Bramai screw 60 (see FIG. 15) and the driver bit 70 (see FIG. 19) according to the embodiment. That is, according to the present embodiment, the horizontal surface portion 73 a and the projection 73 b formed on the flat blade portion 72 of the driver bit 70 are respectively formed by the one linear groove 62 a of the Brahmi screw 60. The blades 7 2 and the side walls 75 of the projections 73 b are fitted into the groove bottoms 63 b and the inclined grooves 63 c, and the side walls 75 of the one straight groove 62 a of the Brahma screw 60 are fitted. 65a can be contacted (see Fig. 22). Therefore, as shown in FIG.
- the driver bit 70 when a non-planar bottom portion 63 b is formed in one of the linear grooves 62 a of the bit fitting groove 62 of the Bramai screw 60, the driver bit 70 is equal to the driver bit 70.
- the contact area of the side wall portion 65 a contacting the side wall portion 75 of the flat blade portion 72 of the driver bit 70 can be increased, and the one side of the Bramai screw 60
- the tapered contact area where the inclined groove portion 6 3 c of the linear groove 6 2 a abuts the protrusion 7 3 b of the driver bit 70 is partial and small, so that the conventional Bramai screw and the driver bit It is possible to reliably prevent the cam pocket phenomenon that occurred in the combination of the keys (see FIG. 21).
- FIG. 23 shows the fitting operation with the driver bit 70 that is suitable for the Brahmi screw 60 according to the embodiment shown in FIG. 18 in particular. That is, in this embodiment, The driver bit 7 applied to the Bramy screw 60 formed so that the bit width of the bit fitting groove 62 becomes almost divergent and concave grooves 62 a ′ and 62 b ′, respectively.
- the side wall portion 75 at the tip of the flat blade portion 72 is a shape that matches the flared grooves 62 a ′ and 62 b ′, that is, the flared side wall portion 75 a
- the grooves 62a 'and 6b are used when the blade 72 of the driver bit 70 and the side wall of the bit fitting groove 62 of the burami screw 60 come into contact with each other. 2 b
- the clearance between the 'and the side wall portions 75a, 75b can be made as small as possible to achieve proper bit fitting with the Brahmi screw.
- Header Punch As the header punch for producing the Bramy screw 60 in the embodiment shown in FIG. 13 and FIG. 14, FIG. 15 and FIG. 16, or FIG. It can be configured according to the header-punch 50 (see FIGS. 11 and 12) in the embodiment of FIG.
- the edge of the bit fitting groove 62 of the screw head 60a is formed as follows.
- a pair of cross-shaped straight grooves 6 each having a raised portion 93 for forming a vertical end wall 6 3 a and a required groove bottom 6 3 b (horizontal bottom, non-planar bottom, inclined bottom), respectively.
- protruding pieces 9 2 a and 9 2 b corresponding to 2 a and 6 2 b, and forms inclined groove sections 6 3 c extending from these protruding pieces toward the center of screw neck 60 b.
- inclined ridges 93c are provided.
- the header-punch for manufacturing the Brahmi screw 60 in the embodiment shown in FIG. 18 is the same as the header-punch 50 for manufacturing the Brahmi screw 60 in the embodiment.
- Bit fitting groove 62 The side walls (see 95a and 95b in Fig. 24) of the protrusions (see 92a and 92b in Fig. 24) forming 62a 'and 62b' By making the width wide so as to extend almost radially outward from the center portion of the screw, the Bramai screw 60 in the embodiment shown in FIG. 18 can be easily manufactured.
- FIG. 25 shows an embodiment of a screwdriver bit for a Bramai screw according to the present invention. That is, in (a) and (b) of FIG. 25, reference numeral 80 indicates a main part structure of a Bramy screw driver 1 bit according to the present invention.
- the tip of the blade part is the screw head 10a to 60a of the conventional Bramai screw 10 shown in Fig. 33 and Fig. 34 to the Bramai screw 60 shown in Fig. 15 to Fig. 18, respectively.
- the driver bit 80 of the present embodiment is fitted in the bit fitting grooves 12 and 62 of the screws 10 and 60, and one of the bit fitting grooves 12 and 62. It is formed as a flat blade portion 82 having an inclined edge portion 83a that engages with the inclined groove portion formed as the straight groove 12a, 62a, and the other straight groove 12b, 62b.
- the center of the tip of each of the flat blade portions 82, 84 is provided with a conical bottom surface 14, 4, 6 provided at the center of the screw heads 10a, 60a of the Bramy screws 10, 60.
- a projection 86 having vertical surface portions 83b and 85b, respectively, to be fitted into 4 is provided. Then, both side surfaces of each of the flat blade portions 82, 84 are formed as substantially vertical side wall portions 87, 88, respectively, to which some taper is allowed.
- the projection 86 protruding from the center of the tip of each of the flat blade portions 82, 84 may have a configuration having inclined surface portions 83c, 85c, respectively, as shown in FIG. it can.
- the driver bit 80 of the present embodiment configured as described above is applied to the Bramie screw 10 shown in FIGS. 28 and 29 or the Bramie screw 60 shown in FIGS. 15 to 18, respectively.
- each flat blade 8 2 and 8 4 fits the corresponding bit fitting groove 1 2 or 6 2 into the groove 1 2a, 1 2b or 6 2 a, 62b can be fitted.
- the one flat blade portion 82 has one straight line of the bit fitting groove 12 as shown in FIG.
- the groove can be properly fitted into the inclined groove portion 12a.
- the inclined edge portion 83a and the projection 86 formed on the flat blade portion 82 of the driver bit 80 are fitted into the inclined groove portion 12a of the prami screw 10 respectively, and the blade portion is formed.
- the side wall portion 87 of the projection 82 and the projection 86 can be brought into contact with the side wall portion 16a of the inclined groove portion 12a of the Brahma screw 10.
- the other flat blade portion 84 can be properly fitted into the horizontal groove portion 12b which is the other straight groove of the bit fitting groove 12. it can.
- the horizontal edge portion 85a and the projection 86 formed on the flat blade portion 84 of the driver bit 80 are fitted into the horizontal groove portions 12b of the Bramy screws 10, respectively, and The side wall portion 88 of the portion 84 and the projection 86 can be brought into contact with the side wall portion 16b of the horizontal groove portion 12b of the Bramie screw 10. Therefore, by rotating the driver bit 80 in the screw tightening direction, the abutting portion (the contact portion) between the blade portion 84 of the driver bit 80 and the horizontal groove portion 12 of the screwdriver 10 is formed.
- T 3 and T 4 a predetermined torque can be transmitted to the primary screw 10 (see FIG. 28).
- the side wall portion 16b formed in the horizontal groove portion 12b of the Brahma screw 10 and the side wall portion of the flat blade portion 34 can be sufficiently large compared to the conventional Phillips screwdriver bit, so that the contact area W
- the taper coupling surfaces 17a, 1a formed at the corners of the linear grooves 12a, 12b adjacent to the bit fitting groove 12 respectively.
- Part of each of the blades 82, 84 of the driver bit 80 abuts on 7b, and it is possible to achieve sufficient torque transmission and achieve proper and reliable screw tightening operation. it can.
- the single bit 80 of the Bramy screw driver of the present embodiment having the above-described configuration can be used in the same manner as described above with respect to the Bramy screw 60 shown in FIGS. 15 to 18.
- Part of each blade part 82, 84 of the driver bit 80 is engaged so that sufficient torque can be transmitted to the adjacent linear grooves 62a, 62b, respectively.
- a proper and secure screw tightening operation can be achieved.
- the blade width (thickness) of each of the blade portions 82, 84 crossing in a cross shape is generally set to the same dimension.
- the width of the horizontal groove 12b in the bit fitting groove 12 of the general Brahmi screw 10 is designed to be larger than the groove width of the inclined groove 12a (see Fig. 28). ). Therefore, if the blade width of the blade portion 84 of the driver bit 80 fitted into the horizontal groove portion 12b is set to a thick width so as to match the groove width of the horizontal groove portion 12b, The contact portion (Tl, T2) between the blade portion 82 and the inclined groove portion 12a, and the contact portion (T3, T4) between the blade portion 84 and the horizontal groove portion 12b. And the most effective torque transmission can be achieved.
- the same torque transmission as described above can be performed at the time of the screw removing operation opposite to the screw tightening operation described above. Can be achieved.
- the preferred embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various design changes can be made without departing from the spirit of the present invention. .
- the screw according to the present invention in the above-described first embodiment has a substantially vertical end wall having a predetermined depth at the edge of the bit fitting groove of the screw head, and the vertical end wall has a predetermined depth.
- a non-planar bottom that is raised from the lower edge toward the center of the screw head is formed.
- a bit fitting groove formed of a cruciform groove is provided in the screw head, and one of the straight grooves intersecting the bit fitting groove is inserted into a Phillips screwdriver.
- the plus driver one bit may be used.
- the groove bottom of the bit fitting groove is provided so as to partially and reduce the taper contact area with one of the linear grooves and to increase the area of the side wall portion with which the leading end of the driver bit abuts.With this configuration, it is possible to reliably prevent the cam bit phenomenon of the driver 1 bit. Also, in the screw of the first embodiment and the brass screw of the second embodiment, the blade portion of the driver 1 bit is fitted.
- the fitting bit fitting groove is formed so as to extend radially outward from the center of the screw head and has a groove width that is almost divergent, and the opening of the opposing side wall portion of each of the adjacent grooves is formed.
- the driver bit that is compatible with the screw in the first embodiment includes a flat blade portion having a substantially horizontal surface portion, which engages with a non-planar bottom formed at the edge of the bit fitting groove of the screw.
- a driver bit that is compatible with the Bramai screw in the second embodiment is:
- a flat blade portion having a substantially horizontal surface portion is provided at the tip thereof for engagement with a groove bottom formed at the edge of one straight groove of the screw, and the tip of each blade portion extends from the groove bottom.
- the manufacture of the screw is simplified by using a header punch having a projection piece or a ridge, which is adapted to the shape of the bit fitting groove of each of the screw and the Bramai screw. It can be mass-produced at low cost.
- the screw and the Bramai screw according to the present invention are each formed such that, when forming the bit fitting groove of the screw head, the screw is formed so as to be raised from the lower edge of the vertical end wall toward the center of the screw head.
- a flat bottom is formed, and the raised non-planar bottom is formed by using projections or ridges of a header punch.
- these projections or ridges are used. Even if it is slightly worn, there is no hindrance to the formation of the raised non-planar bottom portion, and therefore, there is obtained an advantage that the production of the screw and the Bramai screw according to the present invention can be mass-produced at low cost.
- the screw and the Brahmi screw according to the present invention have a configuration in which the taper contact area with respect to the entire bit fitting groove is basically partially and small when fitting with the driver bit. Moreover, by enlarging the area of the side wall of the bit fitting groove with which the side wall at the tip of the driver bit abuts, the cam rattling phenomenon of the driver bit is almost eliminated, and this effect is as shown in Fig. 31. It has the advantage that it can be used effectively even when using the conventional driver 1 bit configured as described above. Therefore, the screw and the Bramai screw according to the present invention can achieve an appropriate screw tightening operation even when a driver bit as shown in FIG. 31 is used, for example. In particular, in combination with the screw shown in FIG. 3 or the Bramai screw shown in FIG. 18, screw tightening work on a production line by an automatic machine can be smoothly achieved.
- the bit of the screw head is provided. Even in the case where, for example, damage (reference numeral 15) shown in FIG. 30 or FIG. 34 occurs due to a cam groove phenomenon in a part of the fitting groove, the driver bit according to the present invention is also used.
- the use of the screw makes it possible to achieve a proper screw tightening operation and a screw removing operation without causing a cam pocket phenomenon.
- the screwdriver bit for the Bramy screw according to the present invention in the third embodiment described above is formed by a pair of straight grooves including an inclined groove part and a horizontal groove part which cross at the center of the screw head.
- a flat blade portion comprising a Bramae screw driver bit to be applied to the Pramay screw having the formed bit fitting groove, having a slanted edge portion fitted along the slant groove portion of the Bramie screw,
- a flat blade portion which intersects the flat blade portion at a right angle, extends at a substantially right angle to be fitted along the horizontal groove portion of the Bramie screw, and forms a horizontal edge portion which contacts the groove bottom surface of the horizontal groove portion;
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Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69736482T DE69736482D1 (de) | 1996-10-24 | 1997-06-27 | Schraube, schraubenzieherklinge und stanze zur herstellung der schraube |
US09/284,881 US6341546B1 (en) | 1996-10-24 | 1997-06-27 | Screw, driver bit and header punch for manufacture of screw |
EP97928500A EP0933538B1 (en) | 1996-10-24 | 1997-06-27 | Screw, driver bit and header punch for manufacture of screw |
AU32758/97A AU3275897A (en) | 1996-10-24 | 1997-06-27 | Screw, driver bit and header punch for manufacture of screw |
CA002269723A CA2269723C (en) | 1996-10-24 | 1997-06-27 | Screw, driver bit and header punch for manufacture of screw |
HK00102475A HK1023389A1 (en) | 1996-10-24 | 2000-04-26 | Screw, driver bit and header punch for manufacture of screw |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8282352A JPH10131930A (ja) | 1996-10-24 | 1996-10-24 | プラマイねじ及びドライバービットとの組合せ |
JP8/282352 | 1996-10-24 | ||
JP798497A JPH10202545A (ja) | 1997-01-20 | 1997-01-20 | プラマイねじ用ドライバービット |
JP9/7984 | 1997-01-20 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/284,881 A-371-Of-International US6341546B1 (en) | 1996-10-24 | 1997-06-27 | Screw, driver bit and header punch for manufacture of screw |
US09/985,052 Continuation US6584876B2 (en) | 1996-10-24 | 2001-11-01 | Screw, driver bit and header punch for manufacture of screw |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998017923A1 true WO1998017923A1 (fr) | 1998-04-30 |
Family
ID=26342403
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1997/002237 WO1998017923A1 (fr) | 1996-10-24 | 1997-06-27 | Vis, lame de tournevis et emboutisseur destine a la fabrication de vis |
Country Status (9)
Country | Link |
---|---|
US (2) | US6341546B1 (ja) |
EP (1) | EP0933538B1 (ja) |
KR (1) | KR20000052734A (ja) |
CN (1) | CN1108459C (ja) |
AU (1) | AU3275897A (ja) |
CA (1) | CA2269723C (ja) |
DE (1) | DE69736482D1 (ja) |
HK (1) | HK1023389A1 (ja) |
WO (1) | WO1998017923A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2003002880A1 (fr) * | 2001-06-29 | 2003-01-09 | Katsuyuki Totsu | Combinaison de vis et d'embout de tournevis, et emboutisseur pour la fabrication de vis |
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NO994934L (no) | 1999-10-08 | 2001-04-09 | Jone Edland | Skruehode og verktøy |
JP4493135B2 (ja) * | 2000-01-06 | 2010-06-30 | 勝行 戸津 | ねじとドライバービットの組合せ |
US6890139B2 (en) * | 2002-02-26 | 2005-05-10 | Phillips Screw Company | Fastener having recess useable with multiple drivers and method of manufacture |
JP4197599B2 (ja) * | 2002-03-12 | 2008-12-17 | 勝行 戸津 | いじり防止ねじ及びドライバービットとの組合せ並びにいじり防止ねじ製造用ヘッダーパンチ |
GB2390408B (en) * | 2002-07-04 | 2005-11-23 | Eric Walker | Screw and driver therefor |
US8001874B2 (en) * | 2003-11-14 | 2011-08-23 | Katsuyuki Totsu | Combination of screw with stabilized strength and screwdriver bit, and header punch for manufacturing the screw with stabilized strength |
US7771459B2 (en) * | 2004-06-07 | 2010-08-10 | Degima Gmbh | Fastener having torque optimized head |
US7255522B2 (en) * | 2004-10-07 | 2007-08-14 | Phillips Screw Company | Spiral drive fastener with engagement ramp |
SG124318A1 (en) * | 2005-02-02 | 2006-08-30 | Spurway Cooke Ind Pte Ltd | Fastener |
CA2619782C (en) * | 2005-08-17 | 2015-06-16 | Gary A. Gemes | Fasteners with multi-tiered recesses and drivers with multi-tiered driving tips |
US7322265B2 (en) * | 2006-01-09 | 2008-01-29 | Chen Hang-Hui | Compound screwdriver head |
US20070207009A1 (en) * | 2006-03-06 | 2007-09-06 | Teng-Hung Lin | Screw with a recess in the head of the screw |
GB2437537A (en) | 2006-04-24 | 2007-10-31 | Jone Edland | Screw head with hexalobular recess and corresponding tool |
US8739660B2 (en) | 2006-04-24 | 2014-06-03 | Ttapdrive As | Screw head and tool for use therewith |
US8166851B2 (en) * | 2008-08-15 | 2012-05-01 | Robert Bosch Gmbh | Combination driving tool for phillips and robertson fasteners |
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1997
- 1997-06-27 EP EP97928500A patent/EP0933538B1/en not_active Expired - Lifetime
- 1997-06-27 DE DE69736482T patent/DE69736482D1/de not_active Expired - Lifetime
- 1997-06-27 AU AU32758/97A patent/AU3275897A/en not_active Abandoned
- 1997-06-27 US US09/284,881 patent/US6341546B1/en not_active Expired - Fee Related
- 1997-06-27 KR KR1019990703534A patent/KR20000052734A/ko active Search and Examination
- 1997-06-27 CN CN97199076A patent/CN1108459C/zh not_active Expired - Fee Related
- 1997-06-27 WO PCT/JP1997/002237 patent/WO1998017923A1/ja active IP Right Grant
- 1997-06-27 CA CA002269723A patent/CA2269723C/en not_active Expired - Fee Related
-
2000
- 2000-04-26 HK HK00102475A patent/HK1023389A1/xx not_active IP Right Cessation
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2001
- 2001-11-01 US US09/985,052 patent/US6584876B2/en not_active Expired - Fee Related
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JPS4958955U (ja) * | 1972-09-08 | 1974-05-24 | ||
JPS5662412U (ja) * | 1979-10-19 | 1981-05-26 | ||
JPS61122409U (ja) * | 1985-01-17 | 1986-08-01 |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2003002880A1 (fr) * | 2001-06-29 | 2003-01-09 | Katsuyuki Totsu | Combinaison de vis et d'embout de tournevis, et emboutisseur pour la fabrication de vis |
JP2003013924A (ja) * | 2001-06-29 | 2003-01-15 | Katsuyuki Totsu | ねじ及びドライバービットとの組合せ並びにねじ製造用ヘッダーパンチ |
Also Published As
Publication number | Publication date |
---|---|
CA2269723A1 (en) | 1998-04-30 |
EP0933538A1 (en) | 1999-08-04 |
DE69736482D1 (de) | 2006-09-21 |
US20020029666A1 (en) | 2002-03-14 |
CN1234099A (zh) | 1999-11-03 |
HK1023389A1 (en) | 2000-09-08 |
EP0933538B1 (en) | 2006-08-09 |
US6341546B1 (en) | 2002-01-29 |
AU3275897A (en) | 1998-05-15 |
CN1108459C (zh) | 2003-05-14 |
US6584876B2 (en) | 2003-07-01 |
KR20000052734A (ko) | 2000-08-25 |
EP0933538A4 (en) | 2001-11-28 |
CA2269723C (en) | 2007-04-10 |
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