JP3052547U - Nut loosening stopper - Google Patents

Abstract

(57) [Summary] [Structure] Bolt longitudinal groove 8 provided in the axial direction of bolt 7
Nut locking stopper 1 having a bolt-side projection 3 that can be fitted into a nut and a nut-side projection 4 that can be fitted in a nut surface groove 6 formed in a plane of the nut 5, and the nut loosening stopper A nut loosening prevention mechanism comprising a tool 1, a bolt 7 having a bolt longitudinal groove 8 formed in the axial direction, and a nut 5 having a nut surface groove 6 formed in a plane. [Effect] Even if the nut tries to loosen in the axial direction of the bolt due to vibration or the like, it can be prevented. The conventional method of tightening with two nuts, the method of using the elasticity of a washer, and the method of inserting a pin Compared to the method using grooved nuts and the method using adhesives, it can withstand a long time, and does not overload nuts and bolts more than necessary. There is.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a technique for stopping loosening of a fastening nut.

[0002]

[Prior art]

 A fastening nut screwed into a bolt often loosens even if it is tightly tightened in a part that receives vibration. Conventionally, in order to prevent the loosening, a method of tightening each other with two nuts, a method of using elasticity of a washer, a method of inserting a pin, a method of using a grooved nut, and a method of using an adhesive have been proposed. However, there is still an accident caused by loosening of the nut in the axial direction. Such a situation reveals that in the above-described conventional example, the locking mechanism or method does not have a decisive factor that can withstand the passage of a long time. It is considered that the method is due to excessive load on nuts and bolts, etc. more than necessary. Examples of patents and utility models that describe nut loosening prevention technology include Japanese Patent Application Laid-Open Nos. Sho 56-109913, Sho 49-14857, Sho 50-5761, and Sho 55-115613. JP-A-57-1813, JP-A-9-300042, JP-A-9-166121, JP-A-58-89280, JP-A-60-34112, JP-A-61-97353, JP-A-61-97353 JP-A-61-133112 can be mentioned.

[0003]

[Problems to be solved by the invention]

 The purpose of the present invention is to provide a technique that solves the drawbacks of the conventional technique.

[0004]

[Means for Solving the Problems]

 The present invention is characterized in that the nut has a projection which can be fitted in a groove formed in the axial direction of the bolt and a projection which can be fitted in a groove formed in a plane of the nut. A bolt having a groove in the axial direction, a nut having a groove in the plane, a projection capable of fitting into the groove formed in the axial direction of the bolt, and The present invention relates to a nut loosening prevention mechanism comprising: a nut loosening stopper having a projection that can be fitted into a groove formed in a plane of the nut.

[0005]

[Embodiment of the invention]

[0006]

【Example】

 Next, embodiments of the present invention will be described with reference to the drawings. 1A and 1B show an embodiment of the present invention, wherein FIG. 1A is a plan view of a nut loosening stopper, FIG. 1B is a side view of the nut loosening stopper, FIG. (D) is a side view of the nut, (E) is a configuration diagram of the bolt, and (F) is an explanatory view showing an embodiment of the nut loosening prevention mechanism of the present invention.

As shown in FIGS. 1 (A) and 1 (B), a nut loosening stopper 1 is provided on a side surface of a ring-shaped main body 2 with a projection 3 (which can be fitted into a groove formed in an axial direction of a bolt). (Hereinafter referred to as a bolt-side protrusion) and a protrusion 4 (hereinafter referred to as a nut-side protrusion) that can be fitted into a groove formed in a plane of the nut. As shown in FIGS. 1C and 1D, a groove 6 (hereinafter referred to as a nut surface groove) is provided on a flat side surface of the nut 5. The nut surface groove 6 is provided, for example, radially around the hole for insertion into the bolt. The width, depth, number, and the like of the nut surface grooves 6 can be appropriately selected. As shown in FIG. 1 (E), a groove 8 (hereinafter referred to as a bolt vertical groove) is provided in the axial direction of the bolt 7 so that the bolt side projection 3 of the nut loosening stopper 1 can be fitted. The width, depth, number, and the like of the bolt vertical grooves 8 can be appropriately selected. As shown in FIG. 1 (F), the nut loosening stopper 1 is attached to the outside of the screw portion 9 of the bolt 7, and the bolt-side projection 3 of the nut loosening stopper 1 is grooved in the axial direction of the bolt 7. The nut-side protrusion 4 of the nut loosening stopper 1 is fitted into the nut surface groove 6 formed in the plane of the nut 5. The fastening using the bolt 7 and the nut 5 is performed by, for example, screwing a screw portion (not shown) of the nut 5 to the screw portion 9 of the bolt 7 and attaching the fixing member 10 as in the illustrated example. Applied to According to the above embodiment of the present invention, the nut loosening stopper 1 has a bolt-side projection 3 which can be fitted into a bolt longitudinal groove 8 formed in the axial direction of the bolt 7, and a flat surface of the nut 5. A nut-side projection 4 which can be fitted into the grooved nut surface groove 6, and the bolt-side projection 3 and the nut-side projection 4 are provided in a bolt grooved in the axial direction of the bolt 7. The nut 5 is fitted in the vertical groove 8 and the nut surface groove 6 formed in the plane of the nut 5. It is longer than conventional methods of tightening each other with two nuts, using the elasticity of washers, inserting a pin, using a grooved nut, or using an adhesive. It can withstand the process and is not necessary for nuts and bolts. Without being too over the load, there is a remarkable effect to prevent loosening.

[0008]

[Effect of the invention]

 As described above, according to the present invention, it is possible to provide a technique having an excellent loosening prevention effect, which is difficult to obtain in the conventional example.

[Brief description of the drawings]

1A and 1B show an embodiment of the present invention, wherein FIG. 1A is a plan view of a nut loosening stopper, FIG. 1B is a side view of the nut loosening stopper, and FIG. Front view, (D) is a side view of the nut, (E) is a configuration diagram of the bolt, (F)
FIG. 4 is an explanatory view showing an embodiment of a nut loosening prevention mechanism of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nut loose stopper 2 Ring-shaped main body 3 Bolt side protrusion 4 Nut side protrusion 5 Nut 6 Nut face groove 7 Bolt 8 Bolt vertical groove 9 Screw part 10 Fixing member

Claims (2)

[Utility model registration claims] 1. A nut loosening comprising a projection which can be fitted in a groove formed in an axial direction of a bolt and a projection which can be fitted in a groove formed in a plane of a nut. Stopper. 2. A bolt having a groove formed in the axial direction, a nut having a groove formed in the plane, a projection capable of being fitted in the groove formed in the axial direction of the bolt, and a flat surface of the nut. A nut loosening stopper having a projection which can be fitted into a groove formed in the nut.