JP2014030855A - Socket for wrench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a socket for a wrench having a small tip part to be inserted even in a narrow place and securing tip strength enough to counter rotational torque.SOLUTION: A socket for a wrench includes a joint part 7 for connecting a rotary tool r to a base end part 2, and a screw reception part 8 for receiving a screw s at a tip part 3. A reinforcing material 5 including a highly elastic fiber material is wound around the screw reception part 8 of the tip part 3. The screw reception part 8 of the tip part 3 is equally divided into n portions in a circumferential direction corresponding to the number of corners n of the screw s, and parts for holding the flat part of the screw s are left as projected pieces 4, 4,... Gaps 6, 6,... are formed into slit shapes among the projected pieces 4, 4,... The reinforcing material 5 is wound around the parts of the projected pieces 4, 4,... and the gaps 6, 6,...

Description

  The present invention relates to a wrench socket that is attached to a manual rotary tool such as a torque wrench or a power rotary tool such as an impact wrench and used to rotate bolts and nuts. In other words, the present invention relates to a wrench socket serving as an adapter for transmitting rotation of a manual rotary tool or a power rotary tool to a screw such as a bolt or a nut.

  The wrench socket is an adapter tool that transmits rotational torque generated by the rotary tool to the screw for the purpose of rotating a hexagonal or other screw such as a bolt or nut using the rotary tool. There are two types of rotary tools that apply torque to the screw through the socket, such as a torque wrench that manually rotates the socket with a handle, and an impact wrench that rotates to the socket with pneumatic or electric power. There is something to give.

  9 to 11 show examples of conventional general wrench sockets. This wrench socket has a socket body 11 formed by integrating one or a plurality of elements, and the illustrated example is an example in which the socket body 11 is integrated. Such a wrench socket basically has a proximal end portion 12 and a distal end portion 13. The base end portion 12 includes a joint 17 for connecting a rotary tool r that rotates the socket body 11 such as a torque wrench or an impact wrench. The distal end portion 13 includes a screw receiving portion 18 for fixing a screw s that is rotationally driven, such as a bolt or a nut.

  The example of the socket for a wrench shown in FIGS. 9 to 11 is an example of a socket that is used by being connected to a rotary tool r having a quadrangular columnar joint like a torque wrench, and the joint 17 on the base end portion 12 side is It is a quadrangular concave portion into which a quadratic protrusion joint of the rotary tool r can be fitted. The illustrated example is an example in which a hexagonal nut is received as the screw s, and the screw receiving portion 18 has a hexagonal inner shape corresponding to the shape of the screw s as the nut.

  Such wrench sockets are often used in the fields of machinery, architecture, and the like, and are often used, for example, in transportation equipment and construction machinery maintenance departments. In recent years, as these functions become more sophisticated and denser, power transmission systems, fuel supply systems, control systems, exhaust systems, and other devices and parts are often mounted at high density. As such devices and parts are mounted at high density, the space in which the wrench socket can be inserted is extremely narrow as a result of the screw being attached and detached in a very narrow space.

  In the conventional wrench socket described above with reference to FIGS. 9 to 11, it is necessary to secure a certain thickness of the distal end portion 13 including the screw receiving portion 18 from the viewpoint of ensuring the strength against the rotational torque of the screw receiving portion 18. . Therefore, the outer diameter D of the tip portion 13 having the screw receiving portion 18 needs to be increased to some extent with respect to the maximum width w of the screw s received in the screw receiving portion 18. As a result, there is a problem that the screw s cannot be attached / detached when the distal end portion 13 becomes large and the insertion destination space is narrow.

Japanese Patent Laid-Open No. 06-198571 Japanese Patent Laid-Open No. 10-249743 JP 2011-16193 A JP 2011-93088 A

  In view of the problems with the conventional wrench socket, the present invention provides a wrench socket that has a small tip so that it can be inserted even in a narrow space and has a tip strength that can sufficiently resist rotational torque. The purpose is to provide. Thereby, the screw can be attached and detached in a narrow portion.

  In the present invention, in order to achieve the above-mentioned object, the reinforcing material 5 including the high elastic fiber material is wound around the screw receiving portion 8 of the tip portion 3 that receives the screw s in the wrench socket. The reinforcing member 5 reinforces the screw receiving portion 8 of the distal end portion 3 that receives the screw s, thereby enabling the diameter of the distal end portion 3 including the screw receiving portion 8 to be reduced.

That is, the wrench socket according to the present invention has a joint portion 7 for connecting the rotary tool r to the proximal end portion 2 and a screw receiving portion 8 for receiving the screw s at the distal end portion 3. A reinforcing material 5 including a highly elastic fiber material is wound around the screw receiving portion 8 of the distal end portion 3.
The reinforcing material 5 is a tape-shaped prepreg in which a highly elastic fiber is impregnated with a thermosetting resin to be in a semi-cured state. Glued around.

  In such a wrench socket, the reinforcing material 5 including the high elastic fiber material is wound around the screw receiving portion 8 of the tip portion 3 that receives the screw s. Therefore, the thickness of the screw receiving portion 8 of the tip portion 3 is small. Even if it is thin, the reinforcing material 5 can ensure strength against rotational torque. In other words, the thickness of the screw receiving portion 8 of the tip portion 3 can be reduced while securing the strength against rotational torque, and the outer diameter D compared to the maximum width w of the screw s can be made smaller than before.

  Further, the screw receiving portion 8 of the tip portion 3 is equally divided into n pieces in the circumferential direction corresponding to the number n of the screws s, and the portion that holds the flat portion of the screw s is the protruding pieces 4, 4. Leave as. The gap between the protrusions 4, 4... Is opened as a gap 6, 6... And the reinforcing material 5 is wound around the protrusions 4, 4.

  By carrying out like this, the thickness of the screw receiving part 8 of the front-end | tip part 3 can be made still thinner, and the outer diameter D can be made smaller. In addition, since the squares of the screw s can be received in the slit-shaped gaps 6, 6,..., When a strong rotational torque load is applied to the screw s or when an impact torque is applied in the rotational direction. In addition, it is difficult to cause troubles such as damage to the vicinity of the square line of the screw s and collapse of the square line of the screw s.

  As described above, the socket for a wrench according to the present invention reduces the wall thickness of the screw receiving portion 8 of the tip portion 3 while ensuring the strength against rotational torque, and has the outer diameter D compared to the maximum width w of the screw s. It can be made smaller than before. Further, when the screw receiving portion 8 of the tip portion 3 is equally divided into n pieces in the circumferential direction corresponding to the number n of the screws s, it becomes difficult to cause troubles such as the square line of the screw s being crushed, The work of tightening or loosening the screw s can be performed safely and reliably.

It is a half section side view showing the 1st example of the socket for wrenches by the present invention. It is a front view which shows the 1st Example of the socket for wrenches by this invention. It is a rear view which shows the 1st Example of the socket for wrenches by this invention. It is the expansion half sectional side view (A) and enlarged front view (B) of the front-end | tip part which show the 1st Example of the socket for wrenches by this invention. It is a half-section side view which shows the 2nd Example of the socket for wrenches by this invention. It is a front view which shows the 2nd Example of the socket for wrenches by this invention. It is a rear view which shows the 2nd Example of the socket for wrenches by this invention. It is the expansion half cross-sectional side view (A) and enlarged front view (B) of the front-end | tip part which show the 2nd Example of the socket for wrenches by this invention. It is a half section side view which shows the prior art example of the socket for wrenches. It is a front view which shows the prior art example of the socket for wrenches. It is a rear view which shows the prior art example of the socket for wrenches.

In the present invention, in order to achieve the above object, the reinforcing material 5 including the high elastic fiber material is wound around the screw receiving portion 8 of the tip portion 3 for receiving the screw s of the wrench socket, thereby receiving the screw s. The screw receiving part 8 of the part 3 was reinforced, and the diameter of the tip part 3 was made possible.
Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to examples.

  1 to 4 show an embodiment of a wrench socket according to the present invention. This wrench socket has a socket main body 1 formed by integrating one or a plurality of elements, and the illustrated example is an example in which the socket main body 1 is integrated. Such a wrench socket is an adapter that mechanically connects a rotary tool r that rotates the socket body 1 such as a torque wrench or an impact wrench and a screw s that is rotationally driven such as a bolt or a nut. Therefore, the socket body 1 basically has a base end portion 2 provided with a joint 7 for connecting the rotary tool r and a tip end portion 3 provided with a screw receiving portion 8 for fixing the screw s. .

  The example of the socket for a wrench shown in FIGS. 1 to 4 is an example of a socket that is used by being connected to a rotary tool r having a quadrangular projection joint like a torque wrench. It is a quadrangular concave portion into which a quadratic protrusion joint of the rotary tool r can be fitted. Further, this illustrated example is an example in which a hexagonal nut is received as the screw s, and the screw receiving portion 8 has a hexagonal inner shape corresponding to the shape of the screw s which is a hexagonal nut. These points are basically the same as those described above with reference to FIGS.

  In the wrench socket shown in FIGS. 1 to 4, the screw receiving portion 8 at the tip portion 3 is equally divided into n pieces in the circumferential direction corresponding to the number of angles n of the screw s received therein. . In the illustrated example, since the number of corners of the hexagonal screw s is n = 6, the screw receiving portion 8 of the distal end portion 3 is equally divided into n = 6 in the circumferential direction. Between the projecting pieces 4, 4... equally divided into n = 6, there are slit-like gaps 6, 6.

  The opposed inner surfaces of the projecting pieces 4, 4... Are flat, and the distance between the pair of projecting pieces 4, 4 facing each other inside the screw receiving portion 8 is slightly larger than the distance between the opposing surfaces of the screw s. Is set. Therefore, as shown in FIG. 2 and FIG. 4B, the screw s is received by the screw receiving portion so that the opposing surfaces of the screw s are sandwiched between the pair of opposing projecting pieces 4, 4. I can do it. At this time, the square line of the screw s is located in the gaps 6 between the projecting pieces 4 and 4. In this state, the screw s can be rotated.

  Further, the reinforcing member 5 is wound around the tip portion 3 having the screw receiving portion 8 divided into the plurality of projecting pieces 4, 4. The reinforcing material 5 includes high-elasticity fibers. The reinforcing material 5 uses a tape-shaped resin as a carrier and holds the high-elasticity fibers on the carrier. A tape-shaped reinforcing member 5 is wound around the tip portion 3 having the screw receiving portion 8, and this is connected to the outer peripheral surface of the tip portion 3 having the screw receiving portion 8, that is, a plurality of projecting pieces 4, 4. Stick to its outer surface.

  As a method of winding the reinforcing material 5 around the screw receiving portion 8, a prepreg having a tape shape obtained by impregnating a thermosetting resin into a highly elastic fiber is prepared, and this is wound around the screw receiving portion 8 by an appropriate number of turns. Roll it up. Thereafter, the thermosetting resin is heated and cured, and adhered around the screw receiving portion 8.

  In this method, since the highly elastic fiber can be bonded around the screw receiving portion 8 simply by heating and curing the impregnated thermosetting resin, there is no need for bonding with an adhesive or the like. In addition, due to the shrinkage of the thermosetting resin during the heating and curing of the thermosetting resin, an appropriate initial stress can be applied to the screw receiving portion 8 to wind the highly elastic fiber.

  As the high elasticity fiber, carbon fiber, glass fiber, aramid fiber or the like, which has a high elastic modulus of 50 GPa or more and a tensile strength of 2.5 Gpa or more is used. In particular, carbon fiber is preferable from the viewpoint of various properties such as high elastic modulus, high strength, and durability. As the thermosetting resin impregnated into the highly elastic fiber, (deleted) epoxy resin, phenol resin, unsaturated polyester, and the like can be used.

  In such a wrench socket, the reinforcing member 5 including the high elastic fiber material is wound around the screw receiving portion 8 of the tip portion 3 that receives the screw s. Therefore, the thickness of the screw receiving portion 8 of the tip portion 3 is reduced. Even if the thickness is reduced and the outer diameter D of the tip 3 is made smaller than the maximum width w of the screw s, the strength against rotational torque can be ensured. Further, the screw receiving portion 8 of the distal end portion 3 is equally divided into n pieces in the circumferential direction corresponding to the number n of angles of the screw s, and the portions that hold the flat portion of the screw s are the projecting pieces 4, 4,. Since the gaps are opened in a slit shape as gaps 6, 6..., The square lines of the screw s can be received at the slit-like gaps 6, 6. As a result, when the screw s is rotated with a strong torque, or when an impact is applied in the direction of rotation, a failure such as damage to the vicinity of the square line of the screw s and collapse of the square line of the screw s is less likely to occur. .

  5 to 8 show other embodiments of the wrench socket according to the present invention. This example of the wrench socket is an example of being used by being attached to a power rotary tool r 'having a chuck as a joint like an impact wrench. The joint 7 ′ of the base end 2 is a hexagonal shaft-like shaft joint that can be fitted and connected to the chuck of the rotary tool r ′. The other points are the same as those of the embodiment described above with reference to FIGS. 1 to 4, and the same portions are denoted by the same reference numerals. The same is true in that the thickness of the screw receiving portion 8 can be reduced and the outer diameter D of the distal end portion 3 can be reduced as compared with the maximum width w of the screw s. Detailed description thereof will be omitted.

  In the above description, the screw receiving portion 8 of the distal end portion 3 of the socket body 1 is equally divided into n projecting pieces 4, 4,... In the circumferential direction corresponding to the number n of the screws s received therein, A slit-shaped gap 6, 6... Is defined between the projecting pieces 4, 4. On the other hand, an embodiment in which the screw receiving portion 8 of the distal end portion 3 of the socket body 1 is not divided but the outer diameter D is reduced and the reinforcing member 5 is wound is included.

  The socket for a wrench according to the present invention uses a rotating tool such as a torque wrench to rotate a screw such as a bolt or nut using a manual rotating tool such as a torque wrench or a power rotating tool such as an impact wrench, and tightening or loosening the screw. It can be used as an adapter that transmits to the screw. In particular, it can be used for tightening or loosening a screw in a narrow portion.

DESCRIPTION OF SYMBOLS 1 Wrench main body 2 Base end part 3 Tip part 4 Projection piece 5 Reinforcement material 6 Gap 7 Joint 8 Screw receiving part

Claims (3)

In the socket for a wrench having a joint part (7) for connecting the rotary tool (r) to the base end part (2) and having a screw receiving part (8) for receiving the screw (s) at the tip part (3), A wrench socket in which a reinforcing material (5) containing a highly elastic fiber material is wound around a screw receiving portion (8) of a tip portion (3). The screw receiving portion (8) of the tip portion (3) is equally divided into n pieces in the circumferential direction corresponding to the number of angles n of the screw (s), and the portion holding the flat portion of the screw (s) is a projecting piece 2. (4), (4), and a gap (6) between the protruding pieces (4), (4),. Wrench socket. The reinforcing material (5) is a tape-shaped prepreg in which a highly elastic fiber is impregnated with a thermosetting resin so as to be in a semi-cured state. 3. The wrench socket according to claim 1, wherein the wrench socket is adhered to the periphery of the portion (8).

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