JP5236128B1 - Fastener - Google Patents

Abstract

Provided is a fastener that can be securely held when it is desired to be fastened and can be easily loosened when it is desired to be loosened.
The nut stopper 43 is pushed in with a hammer or the like. The protrusion 55 of the nut stopper 43 is pushed into the back while being guided with respect to the long groove 25 of the foot 23A. At this time, the inclined surface 39 of the nut 33 comes into contact with the inclined surface 49 of the nut stopper 43 and is pushed in, whereby a rotational force in the fastening direction indicated by the arrow in the drawing is generated in the nut 33. The inclined surface 39 of the nut 33 rotates while getting over the notch groove 51 formed in the inclined surface 49 of the nut stopper 43. On the other hand, when the push-in is stopped, the notch groove 41 of the nut 33 and the notch groove 51 of the nut stopper 43 are locked by the looseness of the nut 33.
[Selection] Figure 1

Description

  The present invention relates to a fastener, and more particularly, to a fastener that can securely hold a fastening state when it is desired to be fastened and can be easily loosened when it is desired to be loosened.

  Conventionally, not only ordinary nuts but also many nuts that have a locking function are used by utilizing frictional force generated on the surface where the object to be fastened with the nut seat surface or frictional force generated on the surface where the bolt and nut are in contact. It had a structure to prevent the nut from rotating in the loosening direction.

For this reason, when vibration occurs after fastening, the nut is likely to loosen with time. In addition, a large force is required when the nut is tightened or loosened, and a large load is applied to the object to be fastened or the screw thread.
For this reason, improvements such as nuts and bolts for the purpose of preventing loosening have been made.

  For example, the fastener of patent document 1 is demonstrated as an example of this improvement. In this example, the hexagon nut 3 is attached by the same process as the conventional one, and the tightening force is confirmed. Next, the instrument 5 is passed through the bolt 1 and inserted to the position where it contacts the hexagon nut 3 with the groove 2 as a guide.

Subsequently, the instrument 9 is passed through the bolt 1 and inserted so that the instrument 9 covers the hex nut 3. After confirming the mounting state, a hammer for fixing is applied using a hammer or the like so that the hexagon nut 3 and the instrument 9 are completely joined.
And loosening is suppressed by fixing the hexagon nut 3 fastened in this way mechanically.

JP 2005-265171 A

However, in the fastener of Patent Document 1, the instrument 9 that covers the hexagon nut 3 in a hat shape is aligned with the hexagonal shape of the hexagon nut 3 and the gear of the coupling instrument 5 inserted using the groove 2 of the bolt 1 as a guide. Since it is necessary to align with the projection 7, alignment during fitting is difficult.
Further, when the impact is applied, the recess 4 in the concave portion and the insertion 10 in the convex portion may be displaced and may be easily removed.

  The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a fastener that can securely hold a fastening state when it is desired to be fastened and can be easily loosened when it is desired to be loosened.

  For this reason, the present invention (Claim 1) is a fastening provided with a nut disposed so as to sandwich a bolt and a member to be fastened, and a stopper for securely fastening the bolt and the nut. And a sliding means for sliding the stopper in the axial direction of the bolt, wherein the nut is screwed to the bolt and can be moved back and forth, and is disposed at least at one place in the circumferential shape. There is a first inclined surface that continues from the nut tip protruding portion to a nut notch deep end corresponding to the nut tip protruding portion, and at least one first notch groove is formed on the first inclined surface. The first slope of the nut is formed such that the stopper continues from a stopper tip protruding portion disposed at least at one circumferential position to a stopper notch deep end corresponding to the stopper tip protruding portion. 2nd tilt to face At least one second notch groove is formed in the second inclined surface, and the stopper is slid by the sliding means by applying a pressing force in the axial direction to the stopper, By rotating the nut in the fastening direction while the second inclined surface is in contact with the first inclined surface, the first notch groove and the second notch groove are released by releasing or weakening the pressing force. It is locked.

By applying a pressing force to the stopper in the axial direction, the stopper is slid by the sliding means. At this time, the nut is rotated in the fastening direction while the second inclined surface of the stopper is in contact with the first inclined surface of the nut. Then, the first notch groove of the nut and the second notch groove of the stopper are locked by releasing or weakening the pressing force.
As described above, the nut is fixed at this position and is not loosened.

  Further, the present invention (Claim 2) is a fastener including a bolt, a female screw disposed on a member to be fastened, and a stopper that ensures fastening between the bolt and the female screw. And a sliding means for sliding the stopper in the axial direction of the bolt, and the bolt has a bolt foot projecting upward and downward from the bolt head, and the bolt head has a circumferential shape. The first inclined surface is continuous from the bolt tip projecting portion disposed at least one position to the bolt notch deep end corresponding to the bolt tip projecting portion. At least one first notch groove is formed, and the female screw is directly engraved so as to contact the male screw of the bolt with respect to the fastened member through which the bolt is passed, or is embedded in the fastened member. The bolt formed inside the formed nut The stopper is screwed in and retracted freely, and the stopper is continuous from a stopper tip protruding portion disposed at least at one circumferential position to a stopper notch deep end corresponding to the stopper tip protruding portion. The second inclined surface is opposed to the first inclined surface of the bolt, and at least one second notch groove is formed in the second inclined surface, and a pressing force is applied to the stopper in the axial direction. In addition, the stopper is slid by the sliding means, the bolt is rotated in the fastening direction while the second inclined surface is in contact with the first inclined surface, and the pressing force is released or weakened. The first cutout groove and the second cutout groove are locked.

By applying a pressing force to the stopper in the axial direction, the stopper is slid by the sliding means. At this time, the bolt is rotated in the fastening direction while the second inclined surface of the stopper is in contact with the first inclined surface of the bolt. Then, by releasing or weakening the pressing force, the first notch groove of the bolt and the second notch groove of the stopper are locked.
As described above, the bolt is fixed at this position and is not loosened.

  Further, according to the present invention (Claim 3), the sliding means includes a long groove formed in the side surface of the foot portion of the bolt along the axial direction, and a protrusion of a stopper that slides guided by the long groove. Prepared and configured.

  Further, according to the present invention (Claim 4), the sliding means includes a hole provided in the fastened member and at least one guide shaft guided with respect to the hole in the stopper.

  As described above, according to the present invention (Claim 1), by applying a pressing force to the stopper in the axial direction, the stopper slides by the sliding means, and the second inclined surface becomes the first inclined surface. Since the first notch groove and the second notch groove are locked by rotating the nut in the fastening direction while abutting and releasing or weakening the pressing force, the nut is fixed and loosened at this position. Things will disappear.

The block diagram of the fastener which is 1st Embodiment of this invention. Development view of the inclined surface of the nut and the inclined surface of the nut stopper An example in which the inclined surface is formed in half steps The block diagram of the fastener which is 2nd Embodiment of this invention. The figure which shows the mode of the guide hole opened with respect to the to-be-fastened member The block diagram of the fastener which is 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described. The block diagram of the fastener which is 1st Embodiment of this invention is shown in FIG. In the side view of the bolt in FIG. 1A and the bottom view of the bolt in FIG. 1B, a member to be fastened 22 such as a plate and a member to be fastened 20 to be fastened to the fastened member 22 have a male screw 21 on the outer periphery. A bolt 23 having a leg portion 23A and a hexagonal head portion 23B are passed. A long groove 25 is formed in the foot portion 23A along the axial direction.

  As shown in the side view of the nut in FIG. 1C, a nut 33 engraved with an internal thread 31 is screwed into the foot portion 23A of the bolt 23 so that the screw 23 can freely advance and retract. . The right end side of the nut 33 in FIG. 1C is formed in a hexagonal plane so as to come into contact with the fastened member 22.

  On the other hand, on the left end side, a continuous spiral inclined surface 39 is formed from the nut tip projecting portion 35 to the nut notch deep end portion 37. A sawtooth-shaped notch groove 41 is formed in at least one portion of the inclined surface 39.

  Further, as shown in a side view of the nut stopper in FIG. 1D, a nut stopper 43 is disposed on the left side of the nut 33. As shown in the bottom view of the nut stopper in FIG. 1E, the outer periphery of the nut stopper 43 is hexagonal, and a circular hole 53 is provided at the inner center, and a projection 55 projects toward the hole 53. It is installed. The protrusion 55 is slid by being guided by the long groove 25 of the bolt.

  The left end side of the nut stopper 43 in FIG. On the other hand, on the right end side, a continuous spiral inclined surface 49 is formed from the stopper tip projecting portion 45 to the stopper notch deep end portion 47. A saw-tooth notch groove 51 is formed in at least one portion of the inclined surface 49. FIG. 2 is a development view of the inclined surface 39 of the nut 33 and the inclined surface 49 of the nut stopper 43.

Next, the operation of the first embodiment of the present invention will be described.
The foot 23 </ b> A of the bolt 23 is passed through the fastened member 20 and the fastened member 22. A washer (not shown) may be inserted between the head 23 </ b> B of the bolt 23 and the fastened member 20. The nut 33 is screwed into the foot portion 23A and temporarily fixed. After arranging the projection 55 of the nut stopper 43 so as to fit in the long groove 25 of the foot 23A, the nut stopper 43 is hit with a hammer or the like and pushed rightward in FIG.

  However, a nut (not shown) may be disposed at the left end of the nut stopper 43 instead of the hammer, and the nut stopper 43 may be pushed in the right direction while rotating the nut.

  The protrusion 55 of the nut stopper 43 is slid in the axial direction while being guided with respect to the long groove 25 of the foot 23A, and is pushed into the back. At this time, the inclined surface 39 of the nut 33 comes into contact with the inclined surface 49 of the nut stopper 43 and is pushed in, whereby a rotational force in the fastening direction indicated by the arrow in the drawing is generated in the nut 33. At this time, the inclined surface 39 of the nut 33 rotates while getting over the notch groove 51 formed in the inclined surface 49 of the nut stopper 43.

  On the other hand, when the pushing is stopped or the pushing force is weakened, the notch groove 41 of the nut 33 and the notch groove 51 of the nut stopper 43 are locked by the looseness of the nut 33. At this time, the nut 33 may be forcibly locked in a form slightly returned in the opposite direction to the fastening.

As described above, the nut 33 is fixed at this position and is not loosened.
When it is desired to remove the nut 33, it is only necessary to slightly rotate the nut 33 in the tightening direction.

  In addition, although the helical inclined surface 39 which continued from the nut front-end | tip protrusion part 35 to the nut notch back end part 37 was formed in 1 step | paragraph in 1 round in FIG.1 and FIG.2, as shown in FIG. In addition, the inclined surface 39a may be formed in two steps so as to form the inclined surface 39a with respect to the half circumference and the inclined surface 39b with respect to the remaining half circumference.

  Further, similarly, it may be formed in one step every 1 / n rounds and in n rounds per round. The wall 48 of the stepped portion may be parallel to the axial direction as shown in FIG. 3, but may be inclined with respect to the axial direction as indicated by a dotted line. These points are also the same for the nut stopper 43 which is opposed.

Next, a second embodiment of the present invention will be described.
The block diagram of the fastener which is 2nd Embodiment of this invention is shown in FIG. In the first embodiment, it has been described that the inclined surface 39 is formed on the nut 33 side, and the nut stopper 43 having the inclined surface 49 facing the inclined surface 39 is disposed. In the second embodiment, the inclined surface 39 is inclined on the bolt side. A surface is formed and a bolt stopper is provided. Note that the same elements as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.

  In the side view of the bolt in FIG. 4A, the fastening member 22 and the fastening member 20 fixed to the fastening member 22 are penetrated by a foot 63A in which a male screw 21 is engraved on the outer periphery of the bolt 60. Has been. A female screw is preliminarily engraved in a portion in contact with the male screw 21 inside the fastened member 22. On the other hand, the internal thread is not engraved inside the fastened member 20. A hexagonal head 63B is fixed to the right side of the foot 63A in FIG. 4A, and a foot 63C having a male screw 21 engraved on the outer periphery is further to the right of the head 63B. Projected. However, the foot part 63A and the foot part 63C may be configured to be fixed after passing through the head part 63B. Moreover, you may be comprised by integral molding.

A plus or minus groove for a driver (not shown) is formed on the right end surface of the foot 63C.
The left end of the head 63 </ b> B is formed in a plane and is brought into contact with the fastened member 20. On the other hand, the right end of the head 63B is formed with a spiral inclined surface 69 that continues from the bolt tip projecting portion 65 to the bolt notch deep end portion 67. A sawtooth-shaped notch groove 61 is formed in at least one portion of the inclined surface 69.

  As shown in the side view of the bolt stopper in FIG. 4B, the outer periphery of the bolt stopper main body 71 constituting the bolt stopper 70 is hexagonal, and a circular hole (not shown) is provided at the inner center. The right end of the bolt stopper main body 71 of FIG. 4 (B) is formed in a plane.

  On the other hand, a spiral inclined surface 79 is formed at the left end that extends from the stopper leading end projecting portion 75 to the stopper notch deep end portion 77. A saw-tooth notch groove 72 is formed in at least one portion of the inclined surface 79.

  A rod-shaped guide shaft 73A and a guide shaft 73B are fixed to the outer wall of the bolt stopper main body 71. And as for this guide shaft 73A and the guide shaft 73B, the left end is inserted with respect to the guide holes 81A and 81B opened with respect to the to-be-fastened member 20, as shown in FIG.

Next, the operation of the second embodiment of the present invention will be described.
The foot part 63 </ b> A of the bolt 60 is passed through the fastened member 22 and the fastened member 20. A washer (not shown) may be inserted between the head 63 </ b> B of the bolt 63 and the fastened member 20. The fastened member 20 is temporarily fixed between the female screw engraved inside the fastened member 22 and the head 63B of the bolt 60.
Further, instead of directly engraving the screwed member 22, a nut may be embedded in a hole (not shown) that is opened in advance in the fastened member 22.
Thereafter, the guide shafts 73A and 73B of the bolt stopper 70 are passed through the guide holes 81A and 81B of the fastened member 20. The guide holes 81A and 81B may be provided so as to pass through the fastened member 22 as well.

  Thereafter, a nut (not shown) is passed through the right end of the bolt stopper main body 71, and the bolt stopper 70 is pushed in while rotating with this nut. However, the bolt stopper main body 71 may be hit with the hammer or the like instead of the nut and pushed in the left direction in the figure.

  The guide shaft 73A and the guide shaft 73B of the bolt stopper 70 slide while being guided with respect to the guide holes 81A and 81B of the fastened member 20 and are pushed into the back. At this time, the inclined surface 69 of the head portion 63B of the bolt 60 comes into contact with the inclined surface 79 of the bolt stopper main body 71, and is pushed into the head portion 63B of the bolt 60 to generate a rotational force in the fastening direction indicated by the arrow in the figure. . The inclined surface 69 of the head 63B of the bolt 60 rotates while getting over the notch groove 72 formed in the inclined surface 79 of the bolt stopper main body 71.

  On the other hand, when the pushing of the bolt stopper 70 is stopped or the pushing force is weakened, the notch groove 72 of the bolt stopper main body 71 and the notch groove 61 of the head 63B of the bolt 60 are locked by the looseness of the head 63B of the bolt 60. . At this time, the bolt 60 is slightly returned in the direction opposite to the fastening direction by applying a screwdriver to the plus or minus groove for the driver carved on the right end surface of the foot 63C of the bolt 60. You may make it latch by.

As described above, the bolt 60 is fixed at this position and is not loosened.
When it is desired to remove the bolt 60, the bolt 60 may be rotated a little in the direction of tightening. At this time as well, the driver may be applied to the foot part 63C of the bolt 60 and rotated.
Note that only one guide shaft 73A, 73B may be provided.

Next, a third embodiment of the present invention will be described.
The block diagram of the fastener which is 3rd Embodiment of this invention is shown in FIG. In the first embodiment, the projection 55 of the nut stopper 43 is guided by the long groove 25 of the bolt 23 and slides. However, in the third embodiment, the guide described in the second embodiment is used instead of the projection 55. An axis is applied. Note that the same elements as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.

  A rod-shaped guide shaft 91A and a guide shaft 91B are fixed to the outer wall of the nut stopper 43. The guide shaft 91A and the guide shaft 91B are inserted into guide holes 81A and 81B opened at the fastening member 20 at the right ends thereof.

  In such a configuration, the nut stopper 43 is pushed rightward in FIG. 6 with a hammer or the like. However, you may make it push in rotating with a nut instead of a hammer. At this time, the guide shaft 91A and the guide shaft 91B of the nut stopper 43 slide while being guided with respect to the guide holes 81A and 81B of the fastened member 20 and are pushed into the back. The inclined surface 39 of the nut 33 comes into contact with the inclined surface 49 of the nut stopper 43 and is pushed in, whereby a rotational force in the fastening direction indicated by the arrow in the drawing is generated in the nut 33.

On the other hand, when the push-in is stopped, the notch groove 41 of the nut 33 and the notch groove 51 of the nut stopper 43 are locked by the looseness of the nut 33.
As described above, the nut 33 is fixed at this position and is not loosened.
When it is desired to remove the nut 33, it is only necessary to slightly rotate the nut 33 in the tightening direction.

  In addition, each embodiment of this invention can be utilized for all the things which can be fastened with a volt | bolt and a nut. In particular, it is useful in the field where fasteners having a function of preventing loosening have been used because they are easy to loosen.

20, 22 Fastened member 23, 60 Bolt 23A, 63A, 63C Bolt foot 23B, 63B Bolt head 25 Long groove 33 Nut 35 Nut tip protruding portion 37 Nut notch deep end 39, 49, 69, 79 Inclined surface 41 , 51, 61, 72 Notch groove 43 Nut stopper 45, 75 Stopper tip protrusion 47, 77 Stopper notch end 53 hole 55 Projection 65 Bolt end protrusion 67 Bolt notch end 70 Bolt stopper 71 Bolt stopper body 73, 91 Guide shaft 81 Guide hole

Claims (4)

A fastener including a nut disposed so as to sandwich a bolt and a member to be fastened, and a stopper for securely fastening the bolt and the nut,
A sliding means for sliding the stopper in the axial direction of the bolt;
The nut is
A screw that is screwed into and retracted from the bolt, and is continuously extended from a nut tip protruding portion that is disposed at least at one circumferential position to a nut notch deep end corresponding to the nut tip protruding portion. 1 inclined surface, and at least one first notch groove is formed in the first inclined surface,
The stopper is
A second inclination facing the first inclined surface of the nut that continues from the stopper tip protruding portion disposed at least at one circumferential position to the stopper notch deep end corresponding to the stopper tip protruding portion. At least one second notch groove is formed in the second inclined surface,
By applying a pressing force to the stopper in the axial direction, the stopper is slid by the sliding means, and the nut is rotated in the fastening direction while the second inclined surface is in contact with the first inclined surface. The fastener is characterized in that the first notch groove and the second notch groove are locked by releasing or weakening the pressing force. A fastener provided with a bolt, a female screw disposed on a member to be fastened, and a stopper that ensures fastening between the bolt and the female screw,
A sliding means for sliding the stopper in the axial direction of the bolt;
The bolt is
A bolt foot projecting upward and downward from the bolt head;
The bolt head has a first inclined surface that continues from a bolt tip projecting portion disposed at least one circumferentially to a bolt notch deep end corresponding to the bolt tip projecting portion, At least one first notch groove is formed in the first inclined surface,
The female screw is
Directly engraved to contact the male screw of the bolt with respect to the fastened member through which the bolt passes, or formed inside a nut embedded in the fastened member, and screwed into the bolt And can be retreated freely,
The stopper is
A second inclination facing the first inclined surface of the bolt continuous from the stopper tip projecting portion disposed at least at one circumferential position to the stopper notch rear end portion corresponding to the stopper tip projecting portion. At least one second notch groove is formed in the second inclined surface,
By applying a pressing force to the stopper in the axial direction, the stopper is slid by the sliding means, and the bolt is rotated in the fastening direction while the second inclined surface is in contact with the first inclined surface. The fastener is characterized in that the first notch groove and the second notch groove are locked by releasing or weakening the pressing force. The sliding means is
A long groove formed along the axial direction on the side surface of the foot of the bolt;
The fastener according to claim 1, further comprising a stopper projection that slides while being guided by the long groove. The sliding means is
A hole made in the fastened member;
The fastener according to claim 1 or 2, wherein the stopper is provided with at least one guide shaft guided with respect to the hole.

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