JP6296186B1 - Locking structure for nuts tightened on bolts - Google Patents

Abstract

An object of the present invention is to reliably prevent loosening of a tightening nut. A cylindrical or conical circular part 2 having a diameter slightly smaller than a root diameter of a male screw is provided, and a tightening nut 6 is formed into a bag shape provided with a cover part 7 for holding the upper end of a bolt, and the cover part. A circular ruled line with the same dimensions as the outer diameter of the bolt base is drawn on the top surface, and two to six positions on this circle are arranged at equal intervals, penetrating the lid from those positions vertically After the conical hole 8 is drilled and the bolt is fixed to the lower member 34 by a method such as implantation, the upper member 32 is placed on the lower member through the bolt hole 33, and a bag-like clamping nut is attached to the bolt. 2-6 attached to the nail body 17 through the 2-6 conical holes 8 of the lid 7 of the tightening nut and then toward the upper peripheral corner 3 of the bolt base. The nail foot 18 is driven in, and the cutting edge 20 at the tip of the wedge portion is bitten there, and the bag-like clamping nut is tightened. To be non-rotatably coupled to. [Selection] Figure 1

Description

  The present invention is a method for preventing loosening of a nut tightened in a coarse screw bolt that requires a strong tightening force.

  As a method of fixing the nut to the bolt to prevent loosening, there is a method of opening a common hole that penetrates the nut and bolt, and fixing by pushing the split pin here, but this drilling is sometimes troublesome because it may be done on site Also, there is a disadvantage that it does not match when the nut is tightened again after unscrewing, and the nut used when pressing the rolling bearing is a fine screw, it can not withstand a heavy load, and the shaft has a groove Since it requires processing, it is unsuitable for use in coarse screw bolts that are widely used, and there is also a double nut type locking nut for increasing the frictional force of the screw surface, but this effect is unknown.

  In the present invention, a short circular base is added to the upper end of the bolt, and a nail foot of a driving nail is driven into a conical hole penetrating from the upper surface of the bag-like tightening nut. It is ensured that the tightening nut is surely prevented from loosening.

In the structure for preventing loosening of the nut to be fastened to the bolt, a male screw is formed and a cylindrical or conical circular part 2 having a diameter smaller than the male screw valley diameter is provided at the upper end, and the upper end of the bolt 1 is Bag-shaped one-side tightening provided with a lid portion 7 and conical holes 8 drilled at equal intervals in 2 to 6 locations on a circle having the same dimensions as the outer diameter of the circular base portion 2 in the lid portion 7 A nut 6, a driving nail 16 provided with 2-6 nail legs 18 to be driven into the conical holes 8, and a driving nail body 17 to which the nail legs 18 are attached; 1 is fixed to the lower member (34), and the upper member 32 is placed in the bolt hole 33 through the bolt 1 on the lower member 34, the one tightening nut 6 is fastened to the bolt 1 and the conical hole 8 is passed through. toward the upper peripheral corner 3 of the circular base portion 2, driving the Kugiashi 18, those A cutting edge 20 with a wedge corner at the tip of the nail foot 18 is bitten into the upper peripheral corner 3 and the one tightening nut 6 is non-rotatably coupled to the bolt 1. The structure of the nuts to prevent loosening.

  Instead of the conical hole 8, a small screw hole 9 is provided, the outer diameter of the nail foot 18 is set to be substantially the same as the effective diameter 12 of the female screw of the small screw hole 9, and the nail foot 18 is set to the small screw. 2. The loosening of the nut tightened in the bolt according to claim 1, wherein the peak of the female screw thread of the small screw hole 9 is pushed downward and expanded by being driven into the hole 9. Stop structure.

A male screw 15 on the outer periphery of the one tightening nut 6 is provided, and a driving nail push-in crown 13 is screwed into the male screw 15 so as to press the driving nail 16 and prevent escape. 2. A structure for preventing loosening of a nut to be fastened to a bolt according to claim 1.

  A center portion of the nail body 17 is provided with a conical hole 21 at the center of the nail, a small screw hole 23 for pressing is provided in the lid portion 7 of the one tightening nut 6, and a small screw 22 for pressing is applied to the above-described nail. 2. The bolt according to claim 1, wherein the nail 16 is pressed through the conical hole 21 at the center of the nail and is screwed into the small screw hole 23 for pressing so as to prevent escape. The structure of the nuts to prevent loosening.

  Instead of the driving nail 16, a plurality of rod-like bar-like nails 24 having a wedge-shaped cutting edge 26 at the tip and a collar 27 at the center, and a screw collar 28 having a through hole 29 are provided. A small screw hole 30 is provided in the lid portion 7 of the one tightening nut 6, and the bar-like nails 24 are individually driven into the conical holes 8, and the cutting edge 26 of the bar-like nail 24 is moved to the upper peripheral angle. The one clamping nut 6 is non-rotatably coupled to the bolt 1 by biting into the portion 3, the through hole 29 is passed through the upper half of the bar-like nail 24, and the screw collar 28 is inserted into the machine screw 2. The rod-like nail 24 according to claim 1, wherein the rod-like nail 24 is prevented from escaping by being screwed into the hole 30 to press the flange 27 of the rod-like nail 24 at the lower end of the screw collar 28. A structure to prevent loosening of nuts tightened on bolts.

  By carrying out the present invention, it is possible to reliably prevent loosening after the nut is firmly tightened on the coarse screw bolt, and it is possible to prevent the nut from falling off due to severe vibration such as in a railway vehicle.

As an example of an embodiment of the present invention, a vertical cross-sectional view of a state in which a bag-like fastening nut is tightened on a bolt to prevent loosening Plan view of FIG. 1 and 2 is an enlarged side view of the driving nail incorporated in FIG. As an example of an embodiment of the present invention, a vertical cross-sectional view of a state in which a bag-like fastening nut is tightened on a bolt to prevent loosening 4 is an enlarged side view of the nail foot of the driving nail incorporated in FIG. As an example of an embodiment of the present invention, a vertical cross-sectional view of a state in which a bag-like tightening nut is tightened on a bolt to prevent loosening and a driving nail is prevented from coming off As an example of an embodiment of the present invention, a vertical cross-sectional view of a state in which a bag-like tightening nut is tightened on a bolt to prevent loosening and a driving nail is prevented from coming off As an example of an embodiment of the present invention, a vertical cross-sectional view of a state in which a bag-like tightening nut is tightened on a bolt to prevent loosening and a driving nail is prevented from coming off

In the structure for preventing loosening of the nut to be fastened to the bolt, a bolt 1 in which a male screw is formed and a cylindrical or conical circular part 2 having a diameter smaller than the valley diameter of the male screw is provided at the upper end, and the upper end of the bolt 1 is A bag-like one-side clamp provided with a crawling lid portion 7 and conical holes 8 drilled at equal intervals in 2 to 6 locations on a circle of the same size as the outer diameter of the circular base portion 2 in the lid portion 7 And a driving nail 16 provided with two or six nail feet 18 to be driven into the conical holes 8, and a driving nail body 17 to which the nail feet 18 are attached, Place the top member 32 to secure the bolt 1 to the lower member 34 through the bolt 1 to the bolt holes 33 on the lower member 34, clamping the other hand tightening nut 6 on the bolt 1, wherein through said Kiriana 8 The nail foot 18 is driven toward the upper peripheral corner 3 of the round base 2, A cutting edge 20 having a wedge corner at the tip of the foot 18 is bitten into the upper peripheral corner 3 and the one tightening nut 6 is non-rotatably coupled to the bolt 1 and is tightened into a bolt. Nut locking mechanism.

  FIG. 1 shows a case where the number of nails to be driven into the conical hole 8 is four. In this case, the driving nail body 17 has a quadrangular shape and is suitable for preventing loosening of a bolt having a bolt diameter of about 30 mm.

  As shown in FIG. 4, instead of the conical hole 8 penetrating the lid portion 7 of the bag-like tightening nut, a small screw hole 9 is provided at that location, and the outer diameter of the nail foot 18 is set to the female diameter of the small screw hole 9. When the nail foot 18 is driven into the small screw hole 9, the crest portion of the female screw of the small screw hole 9 is bent downward and expanded. The structure for preventing the loosening of the nut tightened on the bolt according to claim 1, wherein:

  The nail foot embedded in the small screw hole 9 is strongly tightened to the screw thread of the small screw hole. In this state, when the nail is driven into the wood, the wood is expanded by the nail and then the restoring force of the wood. The nail foot of the driving nail is tightened more tightly on the top of the screw thread of the expanded screw hole and pushed downward when a pulling force is applied. The crest of the bent screw thread tries to return to its original shape, and it tries to bite into the surfaces of both feet and prevent its escape. This phenomenon is caused by providing a large number of small protrusions on the surface of the nail foot of the driving nail. It becomes possible to prevent escape more strongly.

  In the case of FIG. 4, the number of driving nails is two, which has a great advantage that a small bolt with a bolt diameter of 25 mm or less can be quickly stopped.

As shown in FIG. 6, the nail foot 18 of the driving nail is driven into the upper peripheral corner 3 of the bolt base 2, and the bag-like tightening nut 6 is non-rotatably coupled to the bolt, and then the bag. A driving nail push-in crown 13 is screwed into the male screw 15 on the outer periphery of the lid portion of the clamping nut to prevent the driving nail from escaping.
In the case of FIG. 6, it is used for a bolt having a relatively small diameter, and has an advantage that intrusion of rainwater and sewage can be prevented.

  As shown in FIG. 7, the nail foot 18 of the driving nail is driven into the upper peripheral corner 3 of the bolt base 2, and the bag-like clamping nut 6 is non-rotatably coupled to the bolt and then pressed. The small bolt 22 for use is passed through the conical hole 21 at the center of the driving nail to strongly press the driving nail to prevent escape.

As shown in FIG. 8, instead of a driving nail having several nail feet that are driven into the conical hole 8 of the lid portion 7 of the bag-like clamping nut 6, the shape of the nail that is individually driven into each of the conical holes is used. The rod-shaped nail 24 is driven into a conical hole, and the wedge-shaped corner cutting edge 26 is placed at the upper peripheral corner of the bolt base 2. 3, after the bag-like tightening nut is non-rotatably coupled to the bolt, the thread collar 28 with a through hole 29 is passed through the upper half of the bar-shaped nail 24 and provided on the lid 7 of the tightening nut. It is screwed into the small screw hole 30 and the rod-shaped nail rod 27 is strongly pressed at its lower end to prevent the rod-shaped nail from escaping. In this case, it is used when the bolt diameter is large.

Effect of the invention

  By carrying out the present invention, after firmly tightening the nut to the coarse screw bolt, it becomes possible to reliably prevent loosening and prevent the nut from dropping off due to severe vibration.

DESCRIPTION OF SYMBOLS 1 ... Bolt 2 ... Bolt disk part 3 ... Upper peripheral corner part of disk part 4 ... Bolt clamping screw 5 ... Bolt implantation screw 6 ... Bag shape Clamping nut 7 ... Clamping nut lid 8 ... Claw hole for nail foot in lid 9 ... Machine screw hole for nail foot in lid 10 ... Valley of machine screw hole for nail foot 11 ... Inner diameter of the nail foot small screw hole 12 ... Effective diameter of the nail foot small screw hole 13 ... Punching nail pushing crown 14 ... Pushing crown female screw 15 ··· Male screw on the outer periphery of the lid 16 ··· Driving nail 17 ··· Driving nail body 18 ··· Nail foot 19 · · · Wedge at the tip of the nail foot 20 · Wedge angle Cutting blade 21 ... drilled nail central hole 22 ... driven nail pressing small bolt 23 ... clamping nut lid pressing screw screw hole 24 ... rod-shaped nail 25 ... Wedge 26 at the tip of the rod-shaped nail Blade 27 ... Rod in the center of the nail 28 ... Screw collar 29 ... Screw collar through hole 30 ... Screw screw small screw hole 31 ... Washer 32 ... Upper member 33 ...・ Bolt hole 34 in the upper member 34 ... Lower member

Claims (5)

A bolt (1) in which a male screw is formed and a cylindrical or conical circular part (2) having a smaller diameter than a valley diameter of the male screw is provided at an upper end in the structure for preventing the nut from being tightened into the bolt, and the bolt Perforated at equal intervals in 2 to 6 places on a circle having the same size as the outer diameter of the lid part (2) in the lid part (7) and the lid part (7) over the upper end of (1) A bag-shaped one tightening nut (6) provided with a conical hole (8), 2 to 6 nail feet (18) driven into the conical hole (8), and the nail foot (18) A driving nail (16) provided with a driving nail body (17) to be attached, the bolt (1) fixed to the lower member (34), and the upper member (32) to its bolt hole (33). ) On the lower member (34) through the bolt (1) and tighten the one tightening nut (6) to the bolt (1). Toward the upper peripheral corner (3) of the circular base portion through said Kiriana (8) (2), the implanted Kugiashi (18), the cutting of the wedge portion angle of the tip of the Kugiashi (18) (20) is bitten into the upper peripheral corner (3), and the one tightening nut (6) is non-rotatably coupled to the bolt (1). Stop structure.   A small screw hole (9) is provided instead of the conical hole (8), and the outer diameter of the nail foot (18) is substantially the same as the effective diameter (12) of the female screw of the small screw hole (9). When the nail foot (18) is driven into the small screw hole (9), the crest of the female screw thread of the small screw hole (9) is pushed downward and expanded. The structure for preventing loosening of a nut tightened on a bolt according to claim 1. The external screw (15) on the outer periphery of the one tightening nut (6) is provided, and the driving nail pushing crown (13) is screwed into the male screw (15), thereby pressing the driving nail (16) to escape. 2. The structure for preventing the loosening of a nut to be fastened to a bolt according to claim 1, wherein:   A center portion of the driving nail body (17) is provided with a conical hole (21) at the center of the driving nail, and a small screw hole (23) for pressing is provided in the lid portion (7) of the one tightening nut (6). Provided and screwed into the small screw hole (23) for pressing through the small nail bolt (22) for pressing through the central nail hole (21) of the driving nail, thereby pressing the driving nail (16) and preventing escape. The structure for preventing loosening of a nut to be fastened to a bolt according to claim 1, wherein:   Instead of the driving nail (16), a plurality of rod-shaped bar-shaped nails (24) each having a wedge-shaped cutting edge (26) at the tip and a collar (27) at the center, and a through hole (29) A screw collar (28) provided with a small screw hole (30) in the lid portion (7) of the one tightening nut (6), and each of the rod-like nails (24) in the conical holes. (8) is driven alone, the cutting edge (26) of the bar-shaped nail (24) is bitten into the upper peripheral corner (3), and the one tightening nut (6) is inserted into the bolt (1). The screw collar (28) is screwed into the machine screw hole (30) by passing the through hole (29) through the upper half of the bar-like nail (24) At the lower end of (28), the rod (27) of the bar-shaped nail (24) is pressed to prevent the bar-shaped nail (24) from escaping. Structure of locking the nut tightening the bolt of claim 1, wherein, characterized in that the.

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