WO2001049459A1

WO2001049459A1 - Driver bit or wrench and screw combination

Info

Publication number: WO2001049459A1
Application number: PCT/JP2000/009200
Authority: WO
Inventors: Katsuyuki Totsu
Original assignee: Katsuyuki Totsu
Priority date: 2000-01-06
Filing date: 2000-12-25
Publication date: 2001-07-12
Also published as: TW477735B; AU2224401A

Abstract

A driver bit or wrench and screw combination wherein the arrangement of the front end of a driver bit or wrench tip edge is improved to make it possible to effectively prevent the come-out phenomenon of said bit or wrench and the arrangement of the portion of an applicable screw abutted by the front end of said tip edge is likewise improved to develop a screw holding function, whereby the proper and quick screw tightening operation is always achieved and the operating efficiency is greatly improved, wherein the front end of a polygonal tip edge is provided with a cylindrical projecting portion forming a circle inscribed in a polygon, the front end surface of this cylindrical projecting portion being in the form of a conical protrusion, a projection is locked in the central portion of said conical protrusion, an extension edge is provided which is formed with a vertical wall vertically extending from said tip edge, the screw head is centrally formed with a polygonal hole defined by a substantially vertical wall surface extending to a required depth, and a conical bottom surface is formed which extends from the lower end of this vertical wall surface toward the center of the screw head; thus, the driver bit or wrench is suitable for use with such screw with a polygon socket head.

Description

TECHNICAL FIELD The present invention relates to a driver bit or a wrench and a screw applied to the driver bit or a wrench, for example, a screw with a hexagonal hole. For a polygonal hole formed in the head of a bolt or the like, a driver bit with a bit tip shaped to fit this polygonal hole and this driver bit are tightly fitted. The present invention relates to a driver bit or a combination of a wrench and a wrench capable of quickly and reliably achieving the mounting and dismounting of the screw or the like by always transmitting an appropriate torque. BACKGROUND ART Conventionally, assembling a hexagon socket head bolt and a driver bit has been known as shown in FIG. 5 or FIG. That is, FIGS. 15 and 16 show a conventional bolt having a six-ft hole at the center of the bolt head, and FIGS. 17 (a) and (b) show the bolt ffl with the hexagonal hole. FIG. 18 shows a state in which the bolt is fitted with a driver bit or wrench.

However, the conventional bolt 10 shown in FIGS. 15 and 16 is provided with a hexagonal hole 12 in the bolt head 10a. Each of the hexagonal holes 12 has a certain vertical wall surface 13 formed from the edge to the bolt neck 10b from the edge portion thereof, and has a gentle inclined almost circular bottom surface 14 at the bottom thereof. Are formed.

On the other hand, the conventional driver bit 20 and wrench 20 shown in (a) and (b) of FIG. 17 have a hexagonal tip blade portion that fits into the hexagonal hole 12 of the bolt 10. 22 and an extension extending as appropriate so as to conform to the shape of the vertical wall surface 13 formed from the edge of the hexagonal hole 12 toward the bolt neck 10b. Blade 2 2 a It consists of a formed configuration. In FIG. 17, reference numeral 23 denotes a vertical wall formed on the side surface of the tip blade 22 or the extension blade 22a. That is, the vertical wall portion 23 formed on the driver bit or wrench 20; and the vertical contact with the vertical wall 13 formed on the hexagon hole 12 of the bolt 10 described above. It is configured as follows.

According to the combination of the conventional bolt and the driver bit or wrench configured as described above, the bolt 10 and the driver bit or the wrench 20 are fitted as shown in FIG. 18 for example. Then, as described above, the tip blade 22 and the extended blade 22 of the driver bit or wrench 20 are respectively fitted into the vertical wall surface 13 of the hexagon hole 12 and the tip blade 2 2 and extension blade 2 2 a Force abuts on vertical wall 13 of hexagonal hole 12 of bolt 10. Therefore, in this state, the predetermined torque can be transmitted to the bolt 10 by rotating the driver bit or the wrench 20. That is, it is possible to mount or remove the bolt 10 on the required bolt mounting target.

However, according to the combination of the conventional bolt 10 having the above-described configuration and a driver bit or wrench 20, as shown in FIG. 18, the hexagonal hole 12 of the bolt head 10 a is A constant vertical wall surface 13 is formed from the opening edge toward the bolt neck 10b. On the other hand, the corresponding driver bit or wrench 20 has a portion adjacent to the ridge line of the extended blade portion 22 a than the hexagonal tip blade portion 22, and a vertical wall surface of the hexagon hole 12. A vertical wall portion 23 suitable for the shape of 13 is formed. Therefore, the blades 22 and 22a of the driver bit or wrench 20 having the vertical wall portion 23 forming the hexagonal surface are connected to the bolt 10 having the vertical wall surface 13 forming the hexagonal surface. When the driver bit or the wrench 20 is brought into contact with the opening edge of the hexagonal hole 12 of the bolt 10 so as to fit the hexagonal hole 12 of the hexagonal hole 12, the hexagonal hole is formed. The length L 1 between the ridges facing each other symmetrically with respect to the center point of the hole 12 is larger than the length L 2 between the vertical wall surfaces 13. Therefore, it is difficult to quickly and manually match the center of the hexagon hole 12 of the bolt 10 with the center of the tip blade 22 of the dry nut bit or wrench 20 by: Extremely difficult [see Figure 16 (indicated by the dashed line) and Figure 18]. Accordingly, in such a field base, a part of the tip blade 22 of the driver bit or wrench 20 is engaged with a part of the opening edge of the hexagon hole 12 of the bolt 10. Even when the bolts are in contact with each other, the tip of the driver bit or wrench 20 has a cutting edge 22, which protrudes outward from the opening edge of the hexagonal hole 12 of the bolt 10. The phenomenon is likely to occur. If a large amount of stress is applied to the driver bit or wrench 20 and the screwing resistance is large, a hexagonal hole as shown by the hatched portion 15 in FIG. 16 is used. Each ridge of the opening edge of 12 gradually breaks. If the damaged portion (hatched portion 15) is gradually enlarged, the force muting phenomenon of the driver one bit or wrench 20 becomes frequent, and it is finally impossible to perform a screwing operation. Become.

From this point of view, in order to prevent the driver 1 bit or wrench 20 from camming out, when turning the driver bit or wrench 20, it is required to be strong against the hexagonal hole 12. It is necessary to apply a thrust to press against the ground. However, there is no problem if the mounting base such as a bolt or screw is a rigid body such as metal, but if the mounting base for precision parts, etc. is used, a driver bit or wrench should be used. When the cam comes out from the hexagonal hole 12, not only the screw head surface is damaged, but also the mounting target is damaged or broken.

Further, the occurrence of the above-mentioned cam-out phenomenon hastens the wear of the bit or wrench tip portion, ie, the tip blade portion 22 and the extension blade portion 22a, and the wear further reduces the cam-art phenomenon. As a result, there is a problem that the damage of the hexagonal hole 12 also increases.

Further, by applying an excessive thrust to the driver bit or wrench 20, it is possible to prevent the cam-out phenomenon; Cannot transmit accurate torque to the driver or screw, etc., and the amount of thrust applied to the driver bit or wrench 20 differs depending on the operator. As a result, the bolt, screw, etc. There is a problem that the tightening torque varies.

When manually tightening a bolt or screw, the operation of rotating the screw or screw while sufficiently pressing the driver bit or wrench 20 against the bolt or screw, etc. There is a drawback that causes a great deal of labor and fatigue for the operator.

In addition, a combination of the conventional bolt 10 and the driver bit or wrench 20 described above. According to the combination, especially when mounting the screw using a power tool, the bolt or wrench shaft is attached to the hexagonal hole 12 at the time of fitting with the bit or wrench tip. It is difficult to rotate the bolt while maintaining a state in which it is properly mounted coaxially. For example, if the bolt axis and the bit or wrench are eccentric or inclined, as shown in Fig. 16 (indicated by the broken line) and Fig. It is difficult to immediately fit the tip of the driver pit or wrench 20 into the screwdriver. Not only does the cam-out phenomenon occur frequently, but also the damage at the opening edge of the hexagonal hole 12 frequently occurs. Become.

Furthermore, when removing screws with a hexagonal hole, etc., the same cam phenomenon as described above and breakage at the opening edge of the hexagonal hole are likely to occur, in which case the screw cannot be removed. As a result, a situation arises in which a part of the screw mounting target must be destroyed. In particular, a pedestal where a hexagonal hole has clogged with dust or the like has a drawback that the occurrence of the above situation becomes remarkable.

The inventor of the present invention has conducted intensive research and trial production, and as a result, has improved the configuration of the polygonal hole in the screw head in combination with the screw and the driver bit or wrench. By improving the configuration of the tip of the tip of the corresponding driver bit or wrench, the cam phenomena of the bit or wrench can be effectively prevented, and the conventional screw breakage can be prevented. Even if the polygonal hole of the screw is damaged, we have found that proper and quick screw tightening work can always be achieved, and the work efficiency can be significantly improved.

That is, as the configuration of the polygonal hole in the screw head, a polygonal hole consisting of a substantially vertical wall surface is formed at the center of the screw head to a required depth, and the polygonal hole is formed from the lower edge of the vertical wall surface. In the case of a thread with a polygonal hole that forms a conical bottom face that faces the center of the neck of the thread, a polygonal inscribed circle is formed at the lower edge of the vertical wall surface of the polygonal hole that is formed in the thread head. A vertical step is formed, and a conical bottom is formed from the lower edge of the vertical step toward the center of the neck. On the other hand, as the configuration of the tip of the tip of the driver bit or wrench for the screw, a cylindrical protruding portion forming a polygonal inscribed circle is formed at the tip of the polygonal tip blade. And an extension blade in which the distal end surface of the cylindrical projection is formed in a conical projection, and a vertical wall portion extending vertically from the distal edge portion is formed. Section is provided. Thus, when the cylindrical protrusion formed at the tip of the tip blade of the bit or wrench comes into contact with the fitting hole with the polygonal hole of the screw, the polygonal inner contact is formed at the opening edge. The fitting base can be quickly and securely locked in the circle, and the turning operation of the bit or wrench allows the vertical wall surface of the screw polygon hole and the tip blade of the bit or wrench to rotate. It was found that the vertical wall portion extending vertically can be immediately matched, and that the cam phenomena can be reliably prevented.

As a result of further intensive research and trial production, the present inventor provided a cylindrical protrusion at the tip of the tip blade of a driver bit or wrench, and provided the cylindrical protrusion. By providing a projection at the center of the fiber-shaped projection formed on the distal end surface of the screw, the projection is positioned at the initial stage of contact of the bit or wrench with the threaded polygonal hole. It has been ascertained that the tip blade can be quickly and accurately inserted into the polygonal hole. In addition, in this case, a vertical step is provided below the vertical wall surface of the polygonal hole formed in the screw head of the screw, and the bit or the laser is formed on the conical bottom formed below the vertical step. By providing a recess corresponding to the protrusion at the tip of the tip blade portion of the wrench, the protrusion and the recess are fitted with each other when the bit or wrench has a fitting hole with the polygonal hole of the screw. Since the bit or wrench axis and the screw axis can always be rotated on the same axis, the cam screw phenomenon can be prevented and the screw head surface can be damaged. Not only can be prevented, but also that the screw-holding function at the tip of the driver bit or wrench can be exerted by the fitting base of the projection and the recess.

Therefore, an object of the present invention is to improve the configuration of the tip of the tip blade portion of a driver bit or wrench, thereby effectively preventing and applying the cam out phenomenon of the bit or wrench. By similarly improving the structure of the part where the tip of the tip blade portion comes into contact with the screw, the screw holding function is exerted, so that proper and quick screw tightening work is always achieved, and work efficiency is improved. One object is to provide a driver bit or wrench and screw combination that can be significantly improved. Disclosure of the invention In order to achieve the above object, a driver bit or a wrench according to the present invention is provided with a cylindrical protruding portion that forms a polygonal inscribed circle at the tip of a polygonal tip blade portion. The distal end surface of the cylindrical projection is formed as a conical projection, a projection is formed at the center of the conical projection, and a vertical wall extending vertically from the tip blade is formed. An extension blade is provided to form a polygonal hole consisting of a substantially vertical wall at the center of the screw head to the required depth, and a conical bottom surface pointing from the lower edge of this vertical wall to the center of the screw neck. It is characterized in that it is configured to fit a thread with a polygonal hole formed by

In this case, the cylindrical protruding portion formed on the tip blade portion can be formed in a parallel cylindrical shape forming a polygonal inscribed circle.

Further, the projection formed at the center of the conical projection is provided with a center hole having a required depth inside the extension blade portion from the tip of the tip blade portion, and is formed of spring steel in the center hole. It can be configured by fitting a rod member.

On the other hand, the screw that fits the driver bit or wrench according to the present invention is to form a polygonal hole consisting of a substantially vertical wall in the center of the screw head to a required depth and to form a lower edge of this vertical wall. At the lower edge of the vertical wall of the polygonal hole formed at the head of the screw, the thread with the polygonal hole formed at the center of the neck of the thread is formed at the bottom of the polygonal hole. A vertical step is formed to form an inscribed circle, and a conical bottom is formed from the lower edge of the straight step toward the center of the neck, and the center of the circle is formed. It is characterized in that a recess is provided in the housing.

In this case, the screw with a polygonal hole is a bolt with a square hole, a screw with a square hole, a bolt with a hexagonal hole, a screw with a hexagonal hole, a bolt with a modified hexagonal hole, a screw with a modified hexagonal hole. In addition, it can be constituted by either a polygonal hole or a bolt with a modified polygonal hole or a screw. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (a) is a side view of a main part showing an embodiment of a driver bit or a wrench according to the present invention. FIG. 1 (b) is a right side view of the driver one bit or wrench of FIG. 1 (a).

FIG. 1 (c) is an end view of the tip of the wrench or one bit of the driver of FIG. 1 (a).

(A) of FIG. 2 is a cross-sectional side view of an essential part of a hexagon socket head cap bolt according to an embodiment of a screw that fits the driver bit or wrench shown in FIG.

(B) of FIG. 2 is a cross-sectional view of a main part taken along line BB of (a) of FIG.

FIG. 3 is a plan view of the head of the hexagon socket head bolt shown in FIG.

FIG. 4 is a cross-sectional side view of an essential part showing a state in which the driver bit or wrench shown in FIG. 1 is abutted on the hexagon socket head bolt shown in FIG.

FIG. 5 is a cross-sectional side view of an essential part of a screw with a square hole made of another embodiment of a screw that is suitable for a driver bit or wrench according to the present invention.

FIG. 6 is a plan view of the head of the screw with a square hole shown in FIG.

FIG. 7 is a side view of a main part of a driver bit or a wrench according to the present invention, which is compatible with the screw having a square hole shown in FIG.

FIG. 8 is a side view of a main part showing still another embodiment of the driver bit or wrench according to the present invention.

FIG. 9 is a sectional side view of an essential part of a screw with a modified hexagonal hole according to another embodiment of the present invention, which is a screw suitable for a driver bit or a wrench according to the present invention.

FIG. 10 is a plan view of the head of the screw with the modified hexagonal hole shown in FIG.

FIG. 11 is a side view of a main part of a screwdriver bit or a wrench according to the present invention suitable for the screw having a modified hexagonal hole shown in FIG.

FIG. 12 is a cross-sectional side view of a main part showing a modified example of the modified hexagonal hole screw that fits the driver bit or wrench according to the present invention in FIG.

FIG. 13 is a side view of a main part of a driver bit or a wrench according to the present invention, which is adapted to the modified example of the modified hexagon socket screw shown in FIG.

FIG. 14 is an end view of the driver bit or wrench tip shown in FIG. FIG. 15 is a cross-sectional side view of a main part of a conventional bolt with a hexagonal hole.

FIG. 16 is a plan view of the head of the hexagon socket head cap bolt shown in FIG. (A) of Fig. 17 is a schematic side view of a conventional screwdriver bit for hexagon socket head bolts.

(B) of Fig. 17 is a schematic side view of a conventional bolt wrench with hexagonal holes. FIG. 18 is a cross-sectional side view of a relevant part showing a contact state between the hexagon socket head bolt shown in FIG. 15 and the driver bit or wrench shown in FIG.

(Explanation of code)

3 0 Driver 1 bit or wrench 3 2 Tip blade

3 2 a Extension blade 3 3 Vertical wall

3 3 ′ Curved vertical wall 3 4 Cylindrical protrusion

3 5 Conical projection 3 6 Projection

3 6 'Bar member 3 7 Center hole

40 Hex socket screw (bolt) 40 a Screw head

4 0 b thread neck 4 2 hexagonal hole

4 2 'deformed hexagon hole 4 3 vertical wall

4 3a lower edge (vertical wall 4 3) 4 3 'curved vertical wall

4 3 a 'Lower edge (ΙΓ§ of straight wall 4 3') 4 4 ϋ Straight section

4 4 a Lower edge (vertical step 4 of 4) 4 5 Bottom of cone

4 6 Recess 5 0 Screw with four holes (bolt)

5 0a thread head 5 0b thread neck

Next, an embodiment of a combination of a driver bit or a wrench and a screw according to the present invention will be described in detail with reference to the accompanying drawings. Example 1

(A), (b) and (c) of FIG. 1 show one embodiment of the driver bit or wrench according to the present invention. That is, the driver bit and the The wrench 30 has a hexagonal tip blade 32 so as to be properly mounted in the bit fitting base hole of a screw having a hexagonal hole as a bit base hole, A cylindrical protruding portion 34 for forming the hexagonal inscribed circle is provided at the tip of the tip blade portion 32, and the distal end surface of the cylindrical protruding portion 34 is formed as a conical protruding portion 35. Further, an extension blade portion 32 a having a vertical wall portion 33 extending vertically from the tip blade portion 32 is provided. In the driver bit or wrench 30 of the present embodiment, a relatively thin and sharp protrusion 36 is provided at the center of the circular protrusion 35.

2 and 3 show an embodiment of a screw 40 applied to a driver bit or wrench 30 according to the embodiment. In other words, in (a) and (b) of the drawings, reference numeral 40 indicates a bolt or a screw having a six-pi hole according to the present invention (hereinafter collectively referred to as a screw). A hexagonal hole 42 as a bit fitting hole is provided in the screw head 40a of the screw 40. The hexagonal hole 42 is provided at the center of the screw head 40a.

However, the hexagonal hole 42 forms a vertical wall surface 43 having a predetermined depth from its opening edge, and the lower wall 43a of the vertical wall surface 43 has the hexagonal shape of the hexagonal hole 42. A vertical step portion 44 that forms an inscribed circle is provided, and the lower edge portion 4 4a of the vertical step portion 4 4a is a slightly inclined circular bottom surface 4 5 that is directed toward the center of the neck 40b. Is formed. Further, in the screw 40 of the present embodiment, the projection is provided at the center of the conical bottom surface 45 at the tip of the tip of the driver bit or wrench 30, There is provided an upper portion 46 configured to be able to fit the projection 36.

Each of the vertical wall surfaces 43 is formed as a substantially vertical wall surface of about 1.5 ° to 5 ° as a punching taper (height of the header punch). Accordingly, in the vertical wall 43 formed in the hexagon hole 42 of the screw 40, the vertical wall 33 of the tip blade 32 of the driver bit or wrench 30 and the fitting table are fitted. I do.

That is, the screwdriver bit or wrench 30 has a cylindrical protruding portion 34 formed at the tip of the tip blade portion 32, with respect to the opening edge of the six hole 42 of the screw 40. Quickly fits and locks with the dimensions of the tangent circle, then the vertical wall 33 that extends vertically from the tip blade 32 The force matches the vertical wall 43 of the screw 40 hexagonal hole 42 As a result, the extended blade portion 32a enters the hexagonal hole 42, and the cylindrical protruding portion 32a. 3 4 fits into the vertical step 4 4 of the hexagonal hole 4 2 and the conical projection 3 5

The fitting operation of the screw 40 and the driver bit or wrench 30 is performed reliably.

According to the present embodiment, as shown in FIG. 4, when the driver bit or the wrench 30 comes into contact with the fitting table with the tip blade 32 of the wrench 30 and the hexagon hole 42 of the screw 40, the bit is inserted. The cylindrical projection 34 at the tip of the wrench or wrench 30, the circular projection 35, and the projection 36 provided at the center of the projection make contact with the hexagonal hole 42 of the screw. In the initial stage, the screw can be quickly and accurately inserted into the hexagonal hole 42. Therefore, in the subsequent operation, simply turning the driver bit or wrench 30 in a predetermined direction, the vertical wall 43 of the hexagon hole 42 of the screw 40 and the driver bit Alternatively, the vertical wall portion 33 extending vertically from the tip blade portion 32 of the wrench 30 can be immediately matched, and a combination of a conventional screw and a driver bit or wrench can be used. It is possible to effectively prevent the camouflage phenomenon occurring in the above. Further, according to the present embodiment, as shown by a broken line in FIG. 4, the driver bit or the tip blade portion 32 of the wrench 30 was securely fitted into the hexagon hole 42 of the screw 40. In this case, a projection 36 provided at the tip of the tip blade 32 of the bit or wrench 30 and a concave portion 46 provided at the center of the conical bottom surface 45 of the screw 40 are fitted. In addition, since the bit or wrench shaft and the screw shaft can always be rotated on the same axis, it is possible not only to prevent the occurrence of camshaft phenomena but also to prevent the occurrence of the protrusion. By fitting the recess 36 to the recess 46, the screw holding function at the tip blade 32 of the driver bit or wrench 30 can be effectively exhibited. Example 2

FIGS. 5 to 7 show another embodiment of the driver 1 bit or wrench according to the present invention. In FIGS. 5 to 7, for convenience of description, the same components as those in the first embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted. .

That is, in this embodiment, a screw 50 with a square hole having a square hole 52 as a bit fitting hole formed in the screw head 50a, and a screwdriver conforming to the screw 50 are provided. Iba — Indicates a bit or wrench 30.

FIGS. 5 and 6 show a screw 50 with a square hole in the present embodiment. That is, the square hole 52 forms a curved vertical wall surface 43 having a predetermined depth from the opening edge thereof, and the lower edge 43 a of the square wall hole 52 is formed on the lower edge 43 a of the vertical wall surface 43. A vertical step 44 that forms an inscribed circle is provided, and a slightly inclined conical bottom surface 45 directed toward the center of the neck 50b is formed from the lower part 44a of the vertical step 44. The conical bottom surface 45 has a concave portion 46 at the center thereof.

FIG. 7 shows an embodiment of a driver bit or wrench 30 suitable for a screw 50 with a square hole according to the present embodiment. That is, the driver bit or wrench 30 of the present embodiment is formed in a rectangular shape so as to properly fit in the square hole 52 as the bit fitting hole of the screw 50. And a cylindrical protruding portion 34 that forms the square inscribed circle is provided at the distal end of the distal blade portion 32. Then, the distal end surface of the cylindrical projection 34 is formed into a fibrous projection 35, and a projection 36 is formed at the center of the fibrous projection 35. An extended blade portion 32 a having a curved vertical wall portion 33 extending vertically from the tip blade portion 32 is provided.

Also in the combination of the driver 1 bit or wrench 30 and the screw 50 of the present embodiment configured as described above, in the same manner as in the first embodiment, the driver bit or wrench is used. The cylindrical protrusion 34 formed at the tip of the screw 30 makes the cylindrical protrusion 34 fit into the square hole 52 of the screw 50 at the time of fitting and abutment with the square hole 52 of the screw 50. 52 In the opening portion of No. 2, it is possible to quickly and surely lock the fitting base in the square inscribed PI, thereby effectively preventing the cam mortality phenomenon and the driver bit. Alternatively, the screw holding function of the tip blade 32 of the wrench 30 can be effectively exhibited. Example 3

FIG. 8 shows a modification of the driver bit or wrench according to the present invention. In FIG. 8, for the sake of convenience, the same components as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and the description thereof will not be repeated.

That is, in this embodiment, the tip of the driver bit or wrench 30 is A central hole 37 having a required depth is formed inside the extended blade portion 3 2a from the end of the portion 32. A rod member 3 6 ′ made of spring steel bent slightly into the central hole 37. It has a configuration in which is fitted. In this case, the tip of the rod member 36 ′ is projected from the conical projection 35 formed at the tip of the driver bit or wrench 30, similarly to the projection 36 in the first embodiment. It is configured to work.

In the driver bit or wrench 30 of this embodiment configured as described above, as is clear from FIG. 8, the axis 0 ′ directed to the tip of the rod member 36 ′ is the bit or the wrench. Since it is displaced with a required spring elasticity with respect to the screw shaft 0 or the screw shaft, the tip of the rod member 36 'and the concave portion 46 provided in the bit fitting hole of the screw 40 are formed. At the time of fitting, the screw holding function of the driver bit or the tip blade 32 of the wrench 30 can be more effectively exerted. Example 4

9 to 11 show still another modification of the driver 1 bit or wrench according to the present invention. In FIGS. 9 to 11, for convenience of description, the same components as those in the first embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted. I do.

That is, in the present embodiment, as the bit I base hole formed in the screw head 40 a, a deformed hexagonal hole 42 protruding in a curved shape while being spaced apart from each other in the radial direction at equal angles in six directions. 'Shows a modified hexagonal socket screw 40 having a' 'and a driver bit or wrench 30 which fits the screw 40.

FIG. 9 and FIG. 10 show a screw 40 with a modified hexagonal hole in this embodiment. That is, the deformed hexagonal hole 4 2 ′ forms a curved vertical wall 4 3 ′ having a predetermined depth from the opening edge thereof, and the deformed hexagonal hole 4 2 ′ is formed on the lower edge 4 3 a ′ of the vertical wall 4 3 ′. A vertical step portion 4 is formed to form a deformed hexagonal inscribed circle of the square hole 4 2 ′, and the vertical step portion 4 4 is directed toward the center of the thread neck 4 0 b from the lower edge 4 4 a. gentle slope a conical bottom 4 5 formed of, _c Figure 1 1 having the configuration in which a recess 4 6 in the center of the circle維底surface 4 5 is al, I with modified hexagon socket according to the present embodiment to An embodiment of a driver bit or wrench 30 conforming to the same 40 is shown. That is, the dry The bar bit or wrench 30 has a tip blade 32 made of a deformed hexagon so that the bar bit or wrench 30 can be properly fitted in the deformed hexagon hole 42 ′ serving as the bit fitting hole of the screw 40. At the tip of the tip blade 32, there is provided a cylindrical projection 34 that forms the inscribed circle of the deformed hexagon. Then, the distal end surface of the cylindrical projection 34 is formed into a circular projection 35, and a projection 36 is formed at the center of the conical projection 35. An extended blade portion 32 a having a curved vertical wall portion 3 3 ′ extending vertically from the blade portion 32 is provided.

Also in the combination with the driver bit or wrench 30 and the screw 40 of the present embodiment configured in this manner, similarly to the above-described respective embodiments, the combination of the driver bit or the wrench 30 Due to the cylindrical projection 34 formed, the cylindrical projection 34 is deformed into a hexagon hole 4 2 ′ of the screw 40 when the cylindrical projection 34 engages with the deformed hexagon hole 4 2 ′ of the screw 40. Can be quickly and reliably fitted and locked in the inscribed circle of the deformed hexagon at the opening edge of the opening, effectively preventing the cam gating phenomenon, and at the same time as the driver bit or the driver bit. The screw holding function of the tip blade 32 of the punch 30 can be effectively exhibited.

Example 5

FIG. 12 to FIG. 4 show the deformation of the driver bit or wrench according to the fourth embodiment. In FIGS. 12 to 14, for convenience of description, the same components as those in the fourth embodiment shown in FIGS. 9 to 11 are denoted by the same reference numerals, and detailed description thereof will be omitted. Omitted.

That is, in the present embodiment, a screw 40 with a deformed hexagonal hole in which the screw head 40a is formed flat and thin, and a driver bit or wrench 30 suitable for the screw 40 are provided. Is shown.

In FIG. 12, the deformed hexagonal holes 42 ′ provided in the screw 40 with a deformed hexagonal hole in the present embodiment protrude in a curved shape at an equal angle in each of six directions in the radial direction. A vertical wall surface 43 'having a relatively small depth, that is, a minute depth, is formed. Then, on the lower edge 4 3 a ′ of the vertical wall surface 4 3 ′, a vertical step portion 44 having a minute depth forming an inscribed circle of the deformed hexagon of the deformed hexagonal hole 4 2 ′ is provided, This vertical column A slightly inclined fiber bottom surface 45 is formed from the lower edge of the portion 44 toward the center of the screw neck 40b, and a concave portion 46 is formed at the center of the fiber bottom surface 45. It has a configuration provided. On the other hand, as shown in FIGS. 13 and 14, the screwdriver 40 or the wrench 30 that fits the screw 40 with a deformed hexagonal hole according to the present embodiment is, as shown in FIGS. It has a tip blade 32 made of a deformed hexagon so that it fits properly into the deformed hexagon hole 4 2 ′ as a socket fitting hole. A minutely protruding cylindrical projection 34 that forms a hexagonal inscribed circle is provided. Then, the distal end face of the cylindrical projection 34 is formed into a conical projection 35, and further, a projection 36 is formed at the center of the circular projection 35, and A configuration is provided in which an extended blade portion 32 a having a curved vertical wall portion 3 3 ′ extending vertically from the blade portion 32 is provided.

As described above, in the screw 40 with a deformed hexagonal hole in which the screw head 40a is formed to be flat and thin, there is a limit in setting the depth of the bit K base hole. The vertical step 44 that forms a square inscribed circle has a very small depth, and the driver bit or wrench 30 that fits it is also limited in the fitting base of the tip blade 32. For this reason, the cylindrical protruding portion 34 corresponding to the deformed hexagonal inscribed circle formed at the tip is formed to have a slightly protruding shape. With such a configuration, similarly to the above-described embodiments, when the tip of the driver bit or wrench 30 and the screw 40 abut on the fitting table, each of the deformed hexagons is formed. The fitting base can be quickly and reliably locked through the portion forming the inscribed circle, the cam ratt phenomenon can be effectively prevented, and the tip blade of a driver bit or wrench 30 can be obtained. The screw holding function in the part 32 can be effectively exhibited.

In particular, as in the present embodiment, there is a limitation on the depth setting of the bit fitting hole, and a base for obtaining a driver bit or wrench suitable for the limitation, the driver bit or the driver bit Even if the edge of the tip blade of the wrench is formed to be flat enough to fit into the bit fitting base hole, a circle and a portion corresponding to the polygonal inscribed circle of the bit fitting hole are formed. Achieves proper and quick screw engagement with the driver bit or wrench by engaging with the protruding protrusion without causing damage to the screw head surface, such as galling. This is possible.

The preferred embodiments of the present invention have been described above. The bolts or screws with square holes, hexagonal screws or screws in the examples are not limited to their deformations or their variants, but various bolts with polygonal holes may be used. The present invention can be applied to a screw or a modification thereof, and of course, many design changes can be made without departing from the spirit of the present invention. . The invention's effect

As is clear from the above-described embodiment, the driver bit or the wrench according to the present invention is provided with a cylindrical protruding portion that forms a polygonal inscribed circle at the tip of a polygonal tip blade portion, The distal end surface of the cylindrical projection is formed as a conical projection, a projection is formed at the center of the conical projection, and a vertical wall is formed extending vertically from the tip blade. The extended blade part is provided to form a polygonal hole consisting of a substantially vertical wall at the center of the screw head to the required depth, and is directed toward the center of the screw neck from the bottom of this vertical wall. With the configuration suitable for a screw with a polygonal hole that forms a conical bottom surface, a screwdriver bit or a wrench can be quickly and easily formed at the opening edge of the screw with a polygonal hole. Engagement and locking can be ensured, and the cam guard phenomenon Along with the can and the child to prevent, Ru can and child to effectively prevent damage to the root Ji head surface. In the present invention, the screw applied to the driver bit or the wrench is formed. A polygonal hole consisting of a substantially vertical wall is formed at the center of the screw head to a required depth, and the vertical wall is formed. In a thread with a polygonal hole formed from the lower edge toward the center of the thread neck at the center of the screw neck, a polygon is formed at the lower edge of the vertical wall surface of the polygonal hole formed in the screw head. A vertical step is formed to form an inscribed circle of the circular step, and a lower surface of the vertical step is formed to form a fibrous bottom that is directed toward the center of the screw neck, and a concave is formed at the center of the conical bottom. With this configuration, the screw holding function can be sufficiently exhibited when the tip of the driver bit or wrench is fitted to the bottom of the screw with a polygonal hole.

In particular, according to the driver bit or the wrench according to the present invention, the screw can be easily and quickly positioned at the center position with respect to the bit fitting hole, and the rotation driving surface of the screw can be achieved. Abuts the contact with the Many excellent advantages can be obtained, such as reducing the damage to the screw by exerting the screw holding function and significantly improving the workability of the screw tightening operation.

Furthermore, in the present invention, the use of a header punch having a protrusion or a ridge that matches the shape of the above-mentioned screw bit base hole facilitates the manufacture of the screw. It can be mass-produced easily and at low cost.

Claims

Scope of the request A cylindrical protruding portion that forms a polygonal inscribed circle is provided at the tip of the polygonal tip blade portion, and the distal end surface of the cylindrical protruding portion is formed into a circular protruding portion. Further, a projection is formed at the center of the conical projection, and an extension blade portion is provided which has a vertical wall portion extending vertically from the tip blade portion, and a center portion of the screw head is provided. It is suitable for a screw with a polygonal hole that forms a polygonal hole consisting of a substantially vertical wall to the required depth and forms a conical bottom surface that extends from the lower edge of this vertical wall to the center of the screw neck. A driver bit or wrench characterized by the configuration described above.

2. The driver bit or wrench according to claim 1, wherein the cylindrical protrusion formed on the tip blade is formed in a parallel cylindrical shape forming a polygonal inscribed circle.

The projection formed at the center of the conical projection is formed by drilling a center hole of a required depth from the tip of the tip blade to the inside of the extension blade, and a rod member made of spring steel in the center hole. The driver bit or the wrench according to claim 1, wherein the driver bit or the wrench is configured by being fitted. At the center of the screw head, a polygonal hole consisting of a substantially vertical wall is formed to the required depth, and at the bottom edge of the vertical wall, a fibrous bottom is formed that is directed to the center of the screw neck. In a thread with a polygonal hole

A vertical step forming a polygonal inscribed circle is provided at the lower edge of the vertical wall surface of the polygonal hole formed in the screw head, and the center of the screw neck from the lower edge of the vertical step. The thread is characterized in that a conical bottom is formed to be directed toward the portion, and a recess is provided in the center of the bottom of the fiber.

Polygon hole screws include square hole screws, square hole screws, hexagon hole screws, hexagon hole screws, modified hexagon hole screws, modified hexagon screws, and other multi-hole screws. 5. The screw according to claim 4, wherein the screw is formed by using either a bolt with a modified polygonal hole or a screw. Claims of amendment

[May 29, 2001 (29.0.5.01) Accepted by the International Bureau: Claim 4 originally filed was withdrawn; Claims 1-3 and 5 originally filed were Corrected. (1 page)]

(After correction) At the tip of the polygonal tip blade, a cylindrical projection that forms a polygonal inscribed circle is provided, and the tip end surface of this cylindrical projection is formed into a circular projection. A driver bit or wrench having a projection formed at the center of the conical projection, and an extension blade formed with a vertical wall extending vertically from the tip blade;

A polygonal hole consisting of a substantially vertical wall is formed at the center of the screw head to the required depth, and a conical bottom is formed from the lower edge of the vertical wall to the center of the screw neck. A vertical step forming a polygonal inscribed circle is provided at the lower edge of the vertical wall of the polygonal hole formed at the head of the screw, and the lower edge of the vertical step is formed. A dry bottom surface is formed by forming a conical bottom that faces toward the center of the neck of the screw, and a thread with a polygonal hole with a recess in the center of the bottom of the cone. A combination of a bar bit or wrench and a screw.

(After correction) The driver bit according to claim 1, wherein the cylindrical protrusion formed on the tip blade of the driver bit or the wrench has a parallel cylindrical shape forming a polygonal inscribed circle. Or a combination of a wrench and a screw.

(After correction) The protrusion formed at the center of the conical protrusion of the driver bit or wrench is formed with a center hole of a required depth inside the extension blade from the tip of the tip blade. The screwdriver or wrench combination according to claim 1, wherein a rod member made of spring steel is fitted into the center hole.

. (Delete)

(After correction) The screws with polygonal holes are square bolts, square hole screws, hexagonal bolts, hexagonal screws, modified hexagonal bolts, modified hexagonal screws, 4. The combination of a screwdriver and a wrench or a wrench according to claim 1, wherein the screw or the wrench is formed of one of a polygonal hole, a bolt with a modified polygonal hole, and a screw.

Paper captured (Article 19 of the Convention) A statement based on Article 19 (1) of the Convention Claim 1 is to provide a cylindrical protruding part that forms a polygonal inscribed circle at the tip of a polygonal tip blade, A driver bit or wrench with the tip of the cylindrical protrusion formed as a conical protrusion, and a protrusion formed at the center of the conical protrusion, and a polygonal hole formed in the screw head A vertical step forming a polygonal inscribed circle is provided at the lower edge of the vertical wall of the screw, and a conical bottom surface is formed from the lower edge of the vertical step toward the center of the screw neck. In addition, the combination with a thread with a polygonal hole with a recess at the center of the bottom of the cone was clarified.

The invention described in the cited examples, in particular, Japanese Utility Model Application Laid-Open No. 60-15887, cited in Reference 1, is a guide having a circular cross section from the center of the bottom of the square hole in a screw having a square hole at the head. A screw with a guide hole whose hole is formed integrally when forming the head with a forged punch and the head is made as thin as possible; a square hole and a square end fitted into the guide hole An object of the present invention is to disclose a combination of a part and a tightening tool having a projection protruding from an end face thereof. Also, in each of the publications of the other cited documents, a cylindrical protrusion that forms a polygonal inscribed circle is provided at the tip of the polygonal tip blade, which is a feature of the present invention. A driver bit or wrench having a cylindrical projection with the tip end surface formed into a fibrous projection and a projection formed at the center of the conical projection, and a screw adapted to this. There is no one that discloses each combination.

The present invention improves the configuration of the tip of a tip bit of a driver bit or a wrench applied to a screw with a polygonal hole that has been widely used in the past, and the above-described screw with a polygonal hole has been described. By similarly improving the configuration of the portion where the tip of the tip blade comes into contact, the screwdriver can smoothly and quickly fit a bit or wrench with a screw with a polygonal hole. The screw-out function can be effectively prevented and the screw holding function is also exhibited, and a combination of a single bit or wrench and a screw with a polygonal hole that can significantly improve the work efficiency is obtained. This is the feature.

A second aspect of the present invention is the combination of the screwdriver or the wrench and the screw according to the first aspect, wherein the driver bit or the wrench has a tip blade. It was clarified that the cylindrical protruding portion formed in the portion was formed into a parallel cylindrical shape forming a polygonal inscribed circle.

Claim 3 is a combination of the screwdriver or the wrench and the screw according to claim 1, wherein the protrusion formed at the center of the conical projection of the screwdriver or wrench is: It has been clarified that a center hole having a required depth is formed inside the extension blade portion from the tip of the tip blade portion, and a rod member made of spring steel is fitted into the center hole.

A fifth aspect of the present invention is the combination of the screwdriver and the wrench or the wrench according to the first aspect, wherein the polygonal-hole screw is a square-hole bolt, a square-hole screw, Hexagon socket head bolts, hexagon socket head screws, modified hexagon socket head bolts, modified hexagon socket socket screws, other polygonal holes or bolts with modified polygon sockets or screws And clarified.