JP2010054049A - Bolt, socket wrench adapted to the same and combination thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bolt, a socket wrench adapted to the bolt and a combination thereof capable of promptly performing center positioning of a fitting hole of a socket and a bolt head when the bolt head is fitted to the socket of the socket wrench, smoothly performing the fitting, simply and easily holding the bolt head in the socket, and easily achieving appropriate bolt fitting work and improvement of the efficiency of the work. <P>SOLUTION: The combination comprises the bolt 10A including a cylindrical hole 12 which has predetermined depth and is provided in the central part of the top face of the polygonal bolt head 10a and of which bottom part is formed to have a conical bottom face 14; and the socket wrench 20A having a support rod 26 which is provided within a fitting hole 24 of the socket 22 and has a tip protruded to have a conical shape and inserted to the cylindrical hole 12 formed on the bolt head 10a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bolt used for a screw tightening operation and a socket wrench adapted to the bolt.

  In the operation of attaching and removing bolts, a socket wrench is generally used which has a socket portion provided with a required engaging recess for receiving a bolt head and is configured to rotationally drive the socket portion.

  When a bolt is attached using such a socket trench, the bolt is smoothly attached to the attachment hole unless the bolt head is properly held in the engagement recess of the socket portion. There is a risk that it will not be possible. Therefore, not only in manual operation, but also in bolt installation work using an automation device, etc., it is necessary to store and hold the bolt head in the proper state with respect to the socket part of the socket wrench. It is extremely important in improving work efficiency.

  From such a viewpoint, conventionally, in a socket wrench provided with a socket portion having a polygonal fitting hole into which a bolt head is fitted at the tip of the bit, the socket portion is provided with screw head locking means. Various configurations have been proposed.

  For example, an annular groove is provided on the outer peripheral surface of the socket portion, an opening that communicates with at least one corner of a polygonal fitting hole from the groove bottom portion of the annular groove is provided, and the ring-shaped spring fitted in the annular groove is provided. A socket wrench is proposed in which a portion of the opening protrudes into the fitting hole so that the bolt head fitted into the fitting hole is held elastically by a part of the ring-shaped spring. (See Patent Document 1).

  Conventionally, it is conceivable that the socket part is made of a permanent magnet and the bolt head is attracted and held. In this case, iron sand or iron powder adheres to the socket part, and the bolt is strong, such as iron. Since it is not practical at all except using a magnetic body, by forming a circumferential groove on the inner peripheral surface of the fitting hole of the socket part and engaging and disposing a missing circular spring wire in this circumferential groove A socket wrench has been proposed in which a bolt head that fits into the fitting hole is elastically held by the cut-out spring wire (see Patent Document 2).

Japanese Utility Model Publication No. 5-39870 JP 2001-18175 A

  As described above, in the conventional socket wrench, the bolt head is configured to be engaged and held by the ring-shaped spring provided in the socket portion. It is necessary to fit the polygonal bolt head to the polygonal fitting hole provided in the socket part. In this case, it is difficult to complete by one-touch operation according to the manual operation, and it is necessary to rotate the socket wrench according to the automation device, which takes time and troublesome work. Therefore, there are difficulties such as significantly lowering work efficiency.

  Therefore, as a result of earnest research and examination, the inventor provided a cylindrical hole with a required depth at the center of the top surface of the bolt head, and formed the bottom of the cylindrical hole on a conical bottom. The socket wrench is provided with a cylindrical hole in the center of the bottom of the fitting hole in the socket part provided with a polygonal fitting hole, and the tip of the fitting hole is inserted through the fitting hole. A supporting rod that protrudes outward from the opening by a required length and protrudes in a conical shape at the tip thereof and fits into a cylindrical hole formed in the bolt head is elastically received through a spring member. When the bolt head is fitted to the socket portion of the socket wrench, the tip of the support rod is fitted into the cylindrical hole of the bolt head, so that the socket portion of the socket wrench can be retracted. Mating hole and bolt head The center positioning is quickly performed and the fitting is also smoothly performed, so that the bolt head can be held in the socket portion by the support rod easily and easily without providing a conventional ring-shaped spring member. I figured out what I could do.

  Accordingly, an object of the present invention is to perform quick positioning of the center of the fitting hole of the socket part and the bolt head when fitting the bolt head to the socket part of the socket wrench, and to smoothly perform the fitting. In addition, the bolt head can be easily and easily retained in the socket portion, and the bolt can be easily adjusted and the work efficiency can be easily improved and adapted to the bolt. It is to provide a socket wrench as well as a combination thereof.

  In order to achieve the above object, the bolt according to claim 1 of the present invention is provided with a cylindrical hole of a required depth at the center of the top surface of the bolt head, and the bottom of the cylindrical hole is formed as a conical bottom. It is characterized by being formed.

  In the bolt according to claim 2 of the present invention, a cylindrical hole having a required depth is provided in the central part of the top surface of the polygonal bolt head that is slightly circularly recessed, and the opening edge of this cylindrical hole is provided. The cylindrical hole is chamfered, and a conical bottom is formed in two stages at the bottom of the cylindrical hole.

  The bolt according to claim 3 of the present invention is characterized in that the inner peripheral surface of the cylindrical hole provided in the central portion of the top surface of the bolt head is formed in a tapered shape.

  The socket wrench according to claim 4 of the present invention comprises a socket wrench having a socket part having a polygonal fitting hole that fits into a polygonal bolt head, and the socket wrench has a fitting hole in the socket part. Further, the present invention is characterized in that a support rod configured to project the tip portion into a conical shape and fit into a cylindrical hole formed in the bolt head is provided.

  The socket wrench according to claim 5 of the present invention is a socket wrench including a socket portion having a polygonal fitting hole that fits into a polygonal bolt head, and the socket wrench of the socket portion has a fitting hole. A cylindrical hole is provided in the center of the bottom, and the tip of the cylindrical hole is inserted through the fitting hole and protrudes outward from the opening of the fitting hole to the required length, and the tip is protruded conically. A support rod for fitting into a cylindrical hole formed in the bolt head is housed and arranged so as to be able to move forward and backward elastically via a spring member.

  The socket wrench according to claim 6 of the present invention is characterized in that the tip end side of the support rod provided in the cylindrical hole of the socket part is formed in a tapered shape.

  The socket wrench according to claim 7 of the present invention includes a cylindrical body inscribed in the cylindrical hole in a cylindrical hole provided at the center of the bottom of the fitting hole in the socket part, and the fitting at one end of the cylindrical body. A sleeve having a polygonal flange portion configured to be engaged with the bottom portion of the joint hole is inserted and fixed, the spring member is disposed in the sleeve, and the other end portion of the support rod is elastically disposed. It is characterized by being housed and locked so as to be able to advance and retract.

  The socket wrench according to claim 8 of the present invention is characterized in that a stepped portion that is fitted and locked to the female thread portion of the nut is formed on the distal end side of the support rod.

  In the socket wrench according to claim 9 of the present invention, a single or a plurality of magnetic poles are located on a part of the outer peripheral surface on the tip end side of the support rod which is accommodated and arranged to be able to move forward and backward in the socket portion. As described above, a permanent magnet is provided.

  The socket wrench according to claim 10 of the present invention is characterized in that a single or a plurality of permanent magnets are fixedly disposed on the flange portion of the sleeve disposed at the bottom of the fitting hole of the socket portion.

In the combination of the bolt and the socket wrench according to claim 11 of the present invention, a cylindrical hole having a required depth is provided at the center of the top surface of the bolt head having a polygonal shape, and the bottom of the cylindrical hole is formed in a conical shape. A bolt characterized by being formed on the bottom surface of
A socket wrench having a socket portion having a polygonal fitting hole that fits into a polygonal bolt head, and a bolt head with a tip projecting conically into the fitting hole in the socket portion. It comprises a combination of a socket wrench characterized by providing a support rod configured to be fitted into a cylindrical hole formed in the part.

In the combination of the bolt and socket wrench according to claim 12 of the present invention, a cylindrical hole having a required depth is provided at the center of the top surface of the bolt head having a polygonal shape, and the bottom of the cylindrical hole is formed in a conical shape. A bolt characterized by being formed on the bottom surface of
A socket wrench having a socket portion having a polygonal fitting hole that fits into a polygonal bolt head, a cylindrical hole is provided in the center of the bottom of the fitting hole in the socket portion, and the cylindrical hole is provided in the cylindrical hole. The tip is inserted through the fitting hole and protrudes outward from the opening of the fitting hole to the required length, and the tip is protruded in a conical shape to be fitted into the cylindrical hole formed in the bolt head. These support rods are combined with a socket wrench characterized by being housed and arranged so as to be able to move forward and backward elastically via a spring member.

In the combination of the bolt and socket wrench according to claim 13 of the present invention, a cylindrical hole having a required depth is provided at the center of the top surface of the bolt head having a polygonal shape, and the bottom of the cylindrical hole is conical. A bolt characterized by being formed on the bottom surface of
A socket wrench having a socket portion having a polygonal fitting hole that fits into a polygonal bolt head, a cylindrical hole is provided in the center of the bottom of the fitting hole in the socket portion, and the cylindrical hole is provided in the cylindrical hole. The cylindrical hole formed in the bolt head is configured and arranged so that the tip does not pass through the fitting hole and protrude outward from the opening of the fitting hole, and the tip protrudes in a conical shape. A combination with a socket wrench, characterized in that a support rod for insertion is stored and arranged elastically through a spring member.

In the combination of the bolt and the socket wrench according to claim 14 of the present invention, a cylindrical hole having a required depth is provided at the center of the top surface of the bolt head having a polygonal shape, and the bottom of the cylindrical hole is formed in a conical shape. A bolt characterized by being formed on the bottom surface of
A socket wrench having a socket portion having a polygonal fitting hole that fits into a polygonal bolt head, a cylindrical hole is provided in the center of the bottom of the fitting hole in the socket portion, and the cylindrical hole is provided in the cylindrical hole. A sleeve including a cylindrical body inscribed in the cylindrical hole, and a polygonal flange portion configured to be engaged with a bottom portion of the fitting hole at one end portion of the cylindrical body; A socket wrench characterized in that the spring member is disposed therein and a support rod for fitting into a cylindrical hole formed in the bolt head is accommodated and disposed to be elastically movable back and forth via the spring member. And a combination of the above.

  The combination of the bolt and the socket wrench according to claim 15 of the present invention is such that the tip end side of the support rod provided in the cylindrical hole of the socket portion is formed in a tapered shape, and the tip end of the support rod is The inner peripheral surface of the cylindrical hole provided in the central portion of the top surface of the bolt head to be fitted is configured to be tapered so as to be coupled in a wedge shape.

  The combination of the bolt and the socket wrench according to claim 16 of the present invention can be obtained by providing a part of the outer peripheral surface on the tip end side of the support rod, which is accommodated in the socket portion of the socket wrench so as to be able to move forward and backward. A permanent magnet is provided so that one or more magnetic poles are located.

  In the combination of the bolt and the socket wrench according to claim 17 of the present invention, a single or a plurality of permanent magnets are fixedly disposed on the flange portion of the sleeve disposed at the bottom of the fitting hole of the socket portion of the socket wrench. It is characterized by that.

  According to the bolt of the first aspect of the present invention, a cylindrical hole having a required depth is provided in the central portion of the top surface of the bolt head, and the bottom of the cylindrical hole is formed on the conical bottom surface. A cylindrical hole formed in the bolt head by projecting a tip portion into a conical shape in the fitting hole of the socket portion having a polygonal fitting hole that fits into a bolt head made of a polygon. By using a socket wrench having a structure provided with a support rod to be fitted into the socket, when the bolt head is fitted to the socket portion of the socket wrench, the tip of the support rod is fitted into the cylindrical hole of the bolt head. As a result, the center positioning of the socket fitting hole and the bolt head is quickly performed, and the fitting is also smoothly performed, so that the bolt head is securely held in the socket portion by the support rod. , Bol Upon the mounting operation, it can easily be achieved an improvement in working efficiency with its optimized.

  According to the bolt of the second aspect of the present invention, in particular, the bottom of the cylindrical hole is configured to be deeply recessed in two stages as a conical bottom, so that the bolt head is integrated by upset (cold forging). This makes it possible to form the bolts, increase the density of the material molecules in the head of the bolt manufacturing wire, and reduce the weight of the bolt and increase its toughness.

  According to the bolt of the third aspect of the present invention, with respect to the support rod provided in the cylindrical hole of the socket portion of the socket wrench that fits into the cylindrical hole provided in the central portion of the top surface of the bolt head, By forming the tip end side into a tapered shape, the fitting with the support rod can be wedge-shaped to achieve a loose connection.

  According to the combination of the socket wrench and the bolt according to claims 4 and 11 of the present invention, in the fitting hole of the socket part having a polygonal fitting hole fitted to the bolt head made of a polygon, A cylindrical hole with the required depth is provided in the center of the top surface of the bolt head by providing a support rod that protrudes in a conical shape at the tip and fits into the cylindrical hole formed in the bolt head. By using the bolt, the center positioning of the fitting hole of the socket part and the bolt head is performed quickly, and the fitting is also performed smoothly. Without providing a bolt, it is possible to reliably hold the bolt head in the socket portion by the support rod, and to easily improve the work efficiency as well as optimizing the bolt mounting operation.

  According to the combination of the socket wrench and the bolt according to the fifth, twelfth and thirteenth aspects of the present invention, when providing the support rod to be fitted into the cylindrical hole formed in the bolt head, the center of the bottom portion of the fitting hole in the socket portion is provided. A cylindrical hole is formed in the cylindrical hole, and a tip of the bolt is inserted through the fitting hole to project a required length outward from the opening of the fitting hole, and the tip is projected in a conical shape. The support rod for fitting into the cylindrical hole formed in the head is housed and arranged to be elastically movable back and forth via a spring member. Can be easily and quickly achieved.

  According to the combination of the socket wrench and the bolt according to claims 6 and 15 of the present invention, the socket wrench is provided in the cylindrical hole of the socket part of the socket wrench, in the cylindrical hole provided in the center of the top surface of the bolt head. In the case where the tips of the support rods are fitted, it is possible to achieve an appropriate connection without a wedge-like looseness due to the taper contact. Therefore, in this case, even if the finished dimensions in manufacturing the cylindrical hole of the bolt and the support wrench of the socket wrench are slightly different from the set dimensions, proper coupling can always be achieved as described above.

  According to the combination of the socket wrench and the bolt according to claims 7 and 14 of the present invention, a cylindrical body inscribed in the cylindrical hole is formed in the cylindrical hole provided in the center of the bottom of the fitting hole in the socket portion. A sleeve having a polygonal flange portion configured to be engaged with a bottom portion of the fitting hole at one end portion of the cylindrical body is inserted and fixed, the spring member is disposed in the sleeve, and the support By adopting a configuration in which the other end portion of the collar is housed and locked so as to be able to move forward and backward elastically, the structure of the support collar becomes an assembling method with parts that can be maintained, and the manufacturing cost is simplified and the manufacturing cost is reduced. Can do.

  According to the socket wrench according to claim 8 of the present invention, not only the fitting of the bolt head but also the nut is formed by forming the stepped portion to be fitted and locked to the female thread portion of the nut at the tip portion of the support rod. And the bolts and nuts can be attached and removed effectively.

  According to the socket wrench of claims 9 and 16 of the present invention, when the bolt head is fitted to the socket portion, when the tip end portion of the support rod is fitted into the cylindrical hole of the bolt head, The center of the socket fitting hole and bolt head is quickly positioned by the permanent magnet's attracting action, and the bolt head is securely held in the support rod or the socket part is fitted into the fitting hole. Can be done smoothly and appropriately.

  According to the socket wrench according to claims 10 and 17 of the present invention, when the bolt head is fitted to the socket portion, when the tip end portion of the support rod is fitted into the cylindrical hole of the bolt head, By the attracting action of the permanent magnet, the socket of the bolt head can be securely and properly inserted and held in the fitting hole.

It is side surface sectional drawing which shows one Example of the volt | bolt which concerns on this invention. It is a top view of the volt | bolt shown in FIG. It is side surface sectional drawing which shows the modification of the volt | bolt shown in FIG. FIG. 4 is a plan view of the bolt shown in FIG. 3. It is a principal part schematic side sectional drawing which shows one Example of the socket wrench suitable for the volt | bolt which concerns on this invention. It is the top view seen from the front-end | tip part side of the socket wrench shown in FIG. FIG. 6 is a schematic cross-sectional explanatory view showing a state where the socket wrench shown in FIG. 5 is applied to the bolt shown in FIG. FIG. 8 is a schematic side cross-sectional view showing a state in which a bolt is attached by fitting the bolt shown in FIG. 7 with a socket wrench. It is principal part schematic side surface sectional drawing which shows another Example of the socket wrench adapted to the volt | bolt which concerns on this invention. FIG. 6 is a schematic side cross-sectional view of a main part showing a modified example of the socket wrench shown in FIG. 5. It is the top view seen from the front-end | tip part side of the socket wrench shown in FIG. It is principal part schematic side surface sectional drawing which shows another Example of the socket wrench suitable for the volt | bolt which concerns on this invention. It is the top view seen from the front-end | tip part side of the socket wrench shown in FIG. It is a principal part schematic side sectional drawing which shows another Example of the socket wrench adapted to the volt | bolt and nut which concerns on this invention. It is a schematic sectional explanatory drawing which shows another Example of the combination of the volt | bolt and socket wrench which concerns on this invention. FIG. 16 is a schematic cross-sectional explanatory view showing a modified example of the combination of the bolt and the socket wrench shown in FIG. 15.

  Next, embodiments of a bolt according to the present invention, a socket wrench adapted to the bolt, and a combination thereof will be described in detail with reference to the accompanying drawings.

( Bolt configuration example 1 )
1 and 2 are schematic configuration diagrams showing an embodiment of a bolt according to the present invention. That is, in FIGS. 1 and 2, reference numeral 10A indicates a hexagonal bolt having a hexagonal head, and a cylindrical hole 12 having a required depth is provided at the center of the top surface of the bolt head 10a of the bolt 10A. In addition, the bottom of the cylindrical hole 12 is formed in a conical bottom surface 14. In manufacturing the bolt 10A of the present embodiment configured as described above, the bolt head 10a made of hexagonal shape is formed by integrally forming the bolt head 10a by upset (cold forging). The top surface 11 has a slightly circularly concave shape, and a cylindrical hole 12 having a required depth is formed at the center thereof, and the opening edge of the cylindrical hole 12 can be chamfered 13. .

( Bolt configuration example 2 )
3 and 4 are schematic configuration diagrams showing another embodiment of the bolt according to the present invention. For convenience of explanation, the same components as those in the embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted. That is, in FIGS. 3 and 4, the bolt 10B of the present embodiment has the same basic configuration as the bolt 10A of the first embodiment. In particular, in the bolt 10B of the present embodiment, the bottom portion of the cylindrical hole 12 is formed by forming a conical bottom surface 14 in two stages (15). In this way, by configuring the bolt 10B of the present embodiment, in particular, by forming the bottom portion of the cylindrical hole 12 as a conical bottom surface 14, 15 so as to be deeply recessed in two stages, it is upset (cold forging). The bolt head 10a can be integrally formed, the density of the material molecules in the head of the bolt manufacturing wire can be increased, and the bolt 10B can be reduced in weight and strengthened. As a modified example of the bolt according to the present invention, as shown by a broken line in FIGS. 3 and 4, it can be configured as a flanged bolt provided with a flange portion 16.

( Socket wrench configuration example 1 )
5 and 6 are schematic configuration diagrams showing an embodiment of a socket wrench according to the present invention. That is, in FIGS. 5 and 6, reference numeral 20 </ b> A indicates a socket wrench provided with a socket portion 22 having a hexagonal fitting hole 24 for fitting a hexagonal bolt head 10 a (see FIG. 1). A support configured such that a tip 28 protrudes conically into the fitting hole 24 in the socket part 22 of the socket wrench 20A and is fitted into a cylindrical hole 12 (see FIG. 1) formed in the bolt head 10a. The configuration is provided with a collar 26. In this case, a cylindrical hole 25 is provided in the center of the bottom of the fitting hole 24 in the socket portion 22, and the tip of the cylindrical hole 25 is inserted through the fitting hole 24 and is outside the opening of the fitting hole 24. A support rod 26 that protrudes in the required length and has its tip 28 protruding in a conical shape and is fitted into the cylindrical hole 12 formed in the bolt head 10a is elastically advanced and retracted through the spring member 30. Store and arrange as possible. The support rod 26 is provided with a slightly protruding step portion 27 at a boundary portion to be fitted into a cylindrical hole 25 provided in the center of the bottom portion of the fitting hole 24, and the cylindrical hole 25 with respect to the protruding step portion 27. By attaching a locking ring spring 29 to the inner peripheral surface of the opening, it can be locked so as not to drop out of the cylindrical hole 25.

  Further, in the configuration of the socket wrench of the present embodiment, the support rod 26 configured to be fitted into the cylindrical hole 12 formed in the bolt head portion 10a is not illustrated, but the length dimension thereof is set short, and the support rod 26 is configured. It is also possible to adopt a constitutional arrangement in which the front end portion 28 is not protruded outward from the opening portion of the fitting hole 24.

( Combination configuration example 1 of bolt and socket wrench )
7 and 8 are schematic configuration diagrams showing an embodiment of a combination of a bolt and a socket wrench according to the present invention. For convenience of explanation, the same reference numerals are given to the same components as those of the respective embodiments of the bolt and socket wrench shown in FIGS. 1 to 6, and detailed description thereof will be omitted.

  FIG. 7 shows a fitting hole 24 of the socket portion 22 of the socket wrench 20A by combining the bolt 10A of the first embodiment shown in FIGS. 1 and 2 and the socket wrench 20A of the third embodiment shown in FIGS. The fitting state of the bolt head 10a with respect to the inside is shown. In this case, the center position of the fitting hole 24 of the socket portion 22 and the bolt head portion 10a is quickly positioned, and the fitting is also smoothly performed. Without providing the bolt head 10a in the socket portion 22 by the support rod 26 can be reliably performed.

  FIG. 8 shows a fitting hole 24 of the socket portion 22 of the socket wrench 20A, which is a combination of the bolt 10A of the first embodiment shown in FIGS. 1 and 2 and the socket wrench 20A of the third embodiment shown in FIGS. A state in which the bolt head 10a is fitted therein and the bolt 10A is attached is shown. In this case, the bolt head 10a in the socket portion 22 can be securely held by the support rod 26, and when the bolt 10A is attached to the attachment target W, it is possible to easily achieve optimization and improvement in work efficiency. .

( Socket wrench configuration example 2 )
FIG. 9 is a schematic configuration diagram showing another embodiment of the socket wrench according to the present invention. The socket wrench 20B of the present embodiment is a socket wrench 20B having a socket portion 22 having a hexagonal fitting hole 24 to be fitted to a hexagonal bolt head 10a. In the hole 24, the tip 28 is projected in a conical shape, and a support rod 26 is provided for fitting into the cylindrical hole 12 formed in the bolt head 10a. In this case, a cylindrical hole 25 is provided in the center of the bottom of the fitting hole 24 in the socket portion 22, and the tip is located in the fitting hole 24 and the tip 28 protrudes conically. Then, the support rod 26 fitted into the cylindrical hole 12 formed in the bolt head 10a is housed and fixed. The support rod 26 is provided with a slightly protruding step portion 27 at a boundary portion to be fitted into a cylindrical hole 25 provided in the center of the bottom portion of the fitting hole 24, and the cylindrical hole 25 with respect to the protruding step portion 27. By attaching a locking ring spring 29 to the inner peripheral surface of the opening, it can be locked so as not to drop out of the cylindrical hole 25.

  With this configuration, as in the fourth embodiment described above, when the bolt head portion 10a is fitted to the socket portion 22 of the socket wrench 20B, the fitting hole 24 of the socket portion 22 and the bolt head portion 10a are connected. The center positioning can be performed quickly and the fitting can be performed smoothly, and the holding of the bolt head 10a in the socket portion 22 can be achieved easily and easily. At the same time, it is possible to easily improve the working efficiency.

( Socket wrench configuration example 3 )
10 and 11 are schematic configuration diagrams showing modifications of the socket wrench according to the present invention. The basic configuration of the socket wrench 20C shown in FIGS. 10 and 11 is the same as the socket wrench 20A described in the third embodiment shown in FIGS. 5 and 6 described above. Therefore, the same components as those in the third embodiment shown in FIGS. 5 and 6 are denoted by the same reference numerals, and detailed description thereof is omitted. In view of this, the socket wrench 20C of the present embodiment has a single part of the outer peripheral surface on the tip end side of the support rod 26 that is accommodated in the socket portion 22 so as to be elastically movable back and forth, as shown in FIGS. A permanent magnet 32 is provided so that one or more magnetic poles are located.

  By configuring the socket wrench 20C in this manner, when the bolt head portion 10a is fitted to the socket portion 22, the tip portion 28 of the support rod 26 is inserted into the cylindrical hole 12 of the bolt head portion 10a. The center of the fitting hole 24 of the socket portion 22 and the bolt head portion 10a is quickly positioned by the attracting action of the permanent magnet 32, and the bolt head portion 10a is held on the support rod 26 or the socket portion 22 is fitted. The fitting into the joint hole 24 can be ensured and performed smoothly and appropriately.

( Socket wrench configuration example 4 )
12 and 13 are schematic configuration views showing still another embodiment of the socket wrench according to the present invention. That is, the socket wrench 20D shown in FIG. 12 and FIG. 13 is provided with a cylindrical hole 25 in the center of the bottom of the fitting hole 24 in the socket part 22, and a cylindrical body 35 inscribed in the cylindrical hole 25 in the cylindrical hole 25. A sleeve 34 having a hexagonal flange portion 36 configured to be engaged with the bottom of the fitting hole 24 at one end portion of the cylindrical body 35 is fixedly inserted, and the spring member 30 is inserted into the sleeve 34. And a support rod 26 to be fitted into the cylindrical hole 12 formed in the bolt head portion 10a is housed and arranged so as to be able to move forward and backward elastically via the spring member 30. The support rod 26 is provided with a slight protruding step portion 27 at a boundary portion to be fitted into a sleeve 34 to be inserted and fixed in a cylindrical hole 25 provided in the center of the bottom portion of the fitting hole 24. By providing a locking portion 37 on the inward side of the flange portion 36 with respect to 27, the locking can be performed so as not to drop off from the sleeve 34. Reference numeral 38 denotes a set screw for inserting and fixing the sleeve 34 in the cylindrical hole 25 of the fitting hole 24.

  By constructing the socket wrench 20D in this way, an assembly method using parts composed of the cylindrical body 35 capable of maintaining the configuration of the support rod 26 and the flange portion 36, the support rod 26, and the spring member 30 is obtained. The manufacturing cost can be reduced with the ease of the manufacturing.

  Further, in the socket wrench 20D of the present embodiment, as shown in FIGS. 12 and 13, a single or a plurality of permanent magnets are provided on the flange portion 36 of the sleeve 34 arranged at the bottom of the fitting hole 24 of the socket portion 22. 40 may be configured to be fixedly arranged. By configuring the socket wrench 20D in this way, when the bolt head portion 10a is fitted to the socket portion 22, the tip portion 28 of the support rod 26 is inserted into the cylindrical hole 12 of the bolt head portion 10a. By the attracting action of the permanent magnet 40, the bolt head 10a can be fitted and held in the fitting hole 24 of the socket 22 and the bolt 10A can be mounted smoothly and properly.

( Socket wrench configuration example 5 )
FIG. 14 is a schematic configuration diagram showing still another embodiment of the socket wrench according to the present invention. That is, the socket wrench 20E shown in FIG. 14 is a modification of the socket wrench 20A of the fourth embodiment shown in FIGS. 7 and 8, and not only the bolt 10 according to the present invention but also the nut 50 is attached and detached. It is configured so that it can be used effectively during work. Therefore, in the socket wrench 20E of the present embodiment, the step portion 26a to be fitted and locked to the female screw portion 52 of the nut 50 is formed on the distal end portion side of the support rod 26 in the configuration of the socket wrench 20A shown in FIG. It is characterized by. The other configurations are the same as those shown in FIG. 7, and the same reference numerals are given to the same components, and the detailed description thereof will be omitted. In the socket wrench 20E of the present embodiment, a permanent magnet 32 is provided in the vicinity of the step portion 26a of the illustrated support rod 26 in the same manner as the socket wrench 20C of the sixth embodiment shown in FIGS. 10 and 11 described above. Accordingly, the nut 50 can be held and the socket portion 22 can be fitted and held in the fitting hole 24, and the nut 50 can be attached smoothly and appropriately. Further, the socket wrench 20E of the present embodiment can be applied as a support rod 26 of the socket wrench 20B, 20D shown in FIGS. 9 and 12, respectively.

( Combination configuration example 2 of bolt and socket wrench )
15 and 16 are schematic configuration diagrams showing still another embodiment of the combination of the bolt and the socket wrench according to the present invention. For convenience of explanation, the same reference numerals are given to the same components as those of the respective embodiments of the bolt and socket wrench shown in FIGS. 1 to 6, and detailed description thereof will be omitted.

  FIG. 15 shows the bolt head 10a formed on the tip side of the support rod 26 provided on the socket portion 22 of the socket wrench 20A in the combination of the bolt and socket wrench of the fourth embodiment shown in FIGS. The outer peripheral surface 26b of the portion that fits into the cylindrical hole 12 is configured to be tapered. Correspondingly, the inner peripheral surface 12a of the cylindrical hole 12 of the bolt head 10a is configured in the same taper shape. In this case, the inclination angle as the tapered shape can be appropriately set within a range of 3 ° to 45 °, for example, with respect to the screw shaft of the bolt. In this embodiment configured as described above, as shown in the figure, the tip end portion (26b) of the support rod 26 of the socket wrench 20A is wedged inside the cylindrical hole 12 (12a) of the bolt head portion 10a. And proper fitting without loosening can be achieved.

  Therefore, according to the combination of the bolt and the socket wrench of the present embodiment, even if the finished dimension in manufacturing the cylindrical hole 12 of the bolt and the support rod 26 of the socket wrench 20A is slightly different from the set dimension, As described above, proper coupling can always be achieved. In addition, about the coupling | bonding structure by the taper shape of the support rod 26 of such socket wrench 20A and the cylindrical hole 12 of the bolt head part 10a, Example 5 shown in FIG. 9 mentioned above, Example shown in FIG. 10 and FIG. 6 and the combination of the socket wrench 20B, 20C, 20D and the bolt in the seventh embodiment shown in FIGS. 12 and 13 can also be applied.

  FIG. 16 shows a modification of the embodiment shown in FIG. That is, in the present embodiment, the support rod 26 provided on the socket portion 22 of the socket wrench 20A has an opening portion of the fitting hole 24 of the socket portion 22 before the conical tip portion 28 is fitted to the bolt 10A. The arrangement is such that it does not protrude further. Other configurations are the same as those of the embodiment shown in FIG. Therefore, the same components as those in the embodiment shown in FIG. 15 are denoted by the same reference numerals, and detailed description thereof is omitted. In this embodiment configured as described above, as shown in the figure, the bolt head portion 10a can be completely stored and held in the socket portion 22 of the socket wrench 20A. A reliable connection between the socket wrench 20A and the bolt can be achieved.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various polygon bolts other than hexagons and polygon socket wrench adapted thereto can be used. In addition, as a support rod in the socket wrench, various known means can be employed in the case where the means for installing the socket portion in the fitting hole is configured to be movable forward or backward or is used as a fixing means that does not advance or retract. In addition to the permanent magnets, various design changes can be made, and many other design changes can be made without departing from the spirit of the present invention.

10A, 10B Hexagonal bolt 10a Bolt head 11 Recessed top surface 12 Cylindrical hole 12a Tapered inner peripheral surface 13 Chamfer 14 Conical bottom surface 15 Second-stage conical bottom surface 16 Flange portion 20A, 20B Socket wrench 20C, 20D socket wrench 22 socket part 24 fitting hole 25 cylindrical hole 26 support rod 26a step part 26b taper-shaped outer peripheral surface 27 protruding step part 28 conical tip part 29 locking ring spring 30 spring member 32 permanent magnet 34 sleeve 35 cylindrical body 36 Hexagon flange portion 37 Locking portion 38 Set screw tool 40 Permanent magnet 50 Nut 52 Female thread portion W Bolt attachment object

Claims (17)

  A bolt characterized in that a cylindrical hole having a required depth is provided in the center of the top surface of a bolt head made of a polygon, and the bottom of the cylindrical hole is formed in a conical bottom.   A cylindrical hole of a required depth is provided at the center of the top surface of the polygonal bolt head that is slightly circularly recessed, and the opening edge of the cylindrical hole is chamfered, and a conical shape is formed at the bottom of the cylindrical hole. Bolt characterized by forming the bottom of the shape in two stages.   The bolt according to claim 1 or 2, wherein an inner peripheral surface of a cylindrical hole provided in a central portion of the top surface of the bolt head is configured in a tapered shape.   A socket wrench having a socket portion having a polygonal fitting hole that fits into a polygonal bolt head, and a bolt head with a tip projecting conically into the fitting hole in the socket portion. A socket wrench provided with a support rod configured to be fitted into a cylindrical hole formed in the portion.   A socket wrench having a socket portion having a polygonal fitting hole that fits into a polygonal bolt head, a cylindrical hole is provided in the center of the bottom of the fitting hole in the socket portion, and the cylindrical hole is provided in the cylindrical hole. The tip is inserted through the fitting hole and protrudes outward from the opening of the fitting hole to the required length, and the tip is protruded in a conical shape to be fitted into the cylindrical hole formed in the bolt head. The socket wrench is characterized in that the support rod is housed and arranged to be elastically movable back and forth via a spring member.   The socket wrench according to claim 4 or 5, wherein a tip end side of a support rod provided in the cylindrical hole of the socket portion is formed in a tapered shape.   In the cylindrical hole provided in the center of the bottom of the fitting hole in the socket part, a cylindrical body inscribed in the cylindrical hole, and a multi-piece configured to be engaged with the bottom of the fitting hole at one end of the cylindrical body. A sleeve having a square flange portion is inserted and fixed, the spring member is disposed in the sleeve, and the other end portion of the support rod is elastically retracted and locked. The socket wrench according to claim 5 or 6.   The socket wrench according to any one of claims 4 to 7, wherein a stepped portion that is fitted and locked to a female screw portion of a nut is formed on a tip end portion side of the support rod.   A permanent magnet is provided so that a single magnetic pole or a plurality of magnetic poles are positioned on a part of an outer peripheral surface of the support rod that is accommodated in the socket portion so as to be elastically movable back and forth. Item 10. A socket wrench according to any one of Items 4 to 8.   8. The socket wrench according to claim 7, wherein a single or a plurality of permanent magnets are fixedly disposed on a flange portion of a sleeve disposed at a bottom portion of the fitting hole of the socket portion. A bolt having a cylindrical hole with a required depth at the center of the top surface of the bolt head made of a polygon, and the bottom of the cylindrical hole formed on a conical bottom;
A socket wrench having a socket portion having a polygonal fitting hole that fits into a polygonal bolt head, the tip portion protruding conically into the fitting hole in the socket portion, and the bolt A combination with a socket wrench, characterized in that a support rod configured to be fitted into a cylindrical hole formed in the head is provided. A bolt having a cylindrical hole with a required depth at the center of the top surface of the bolt head made of a polygon, and the bottom of the cylindrical hole formed on a conical bottom;
A socket wrench having a socket portion having a polygonal fitting hole that fits into a polygonal bolt head, a cylindrical hole is provided in the center of the bottom of the fitting hole in the socket portion, and the cylindrical hole is provided in the cylindrical hole. The tip is inserted through the fitting hole and protrudes outward from the opening of the fitting hole to the required length, and the tip is protruded in a conical shape to be fitted into the cylindrical hole formed in the bolt head. A combination with a socket wrench, characterized in that the support rods are accommodated and arranged so as to be able to move forward and backward elastically via a spring member. A bolt having a cylindrical hole with a required depth at the center of the top surface of the bolt head made of a polygon, and the bottom of the cylindrical hole formed on a conical bottom;
A socket wrench having a socket portion having a polygonal fitting hole that fits into a polygonal bolt head, a cylindrical hole is provided in the center of the bottom of the fitting hole in the socket portion, and the cylindrical hole is provided in the cylindrical hole. The cylindrical hole formed in the bolt head is configured and arranged so that the tip does not pass through the fitting hole and protrude outward from the opening of the fitting hole, and the tip protrudes in a conical shape. A combination with a socket wrench, characterized in that a support rod for insertion is accommodated and arranged to be elastically movable back and forth via a spring member. A bolt having a cylindrical hole with a required depth at the center of the top surface of the bolt head made of a polygon, and the bottom of the cylindrical hole formed on a conical bottom;
A socket wrench having a socket portion having a polygonal fitting hole that fits into a polygonal bolt head, a cylindrical hole is provided in the center of the bottom of the fitting hole in the socket portion, and the cylindrical hole is provided in the cylindrical hole. A sleeve including a cylindrical body inscribed in the cylindrical hole, and a polygonal flange portion configured to be engaged with a bottom portion of the fitting hole at one end portion of the cylindrical body; A socket wrench characterized in that the spring member is disposed therein and a support rod for fitting into a cylindrical hole formed in the bolt head is accommodated and disposed to be elastically movable back and forth via the spring member. Combination with.   The front end side of the support rod provided in the cylindrical hole of the socket portion is configured to have a tapered shape, and the cylindrical hole provided in the central portion of the top surface of the bolt head to which the front end of the support rod is fitted. The combination of a bolt and a socket wrench according to any one of claims 11 to 14, wherein the inner peripheral surface is configured to be tapered so as to be coupled in a wedge shape.   A permanent magnet is provided so that a single magnetic pole or a plurality of magnetic poles are located on a part of the outer peripheral surface on the tip end side of the support rod that is housed and arranged in a socket portion of the socket wrench so as to be able to move forward and backward. A combination of a bolt and a socket wrench according to any one of claims 11 to 15.   The bolt and socket wrench according to claim 14 or 15, wherein a single or a plurality of permanent magnets are fixedly arranged on a flange portion of a sleeve arranged at a bottom portion of a fitting hole of a socket portion of the socket wrench. combination.

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