JP2008038947A - Locking mechanism for screw - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a locking mechanism for a screw prevented from being loosened against any vibration after tightening a tightening member, for the purpose of solving an individual disadvantage, because various practical and inventive female screw bodies are not enough to prevent the loosening, although those exist as ones for preventing the tightening member tightened by the female screw from being loosened. <P>SOLUTION: This locking mechanism for the screw is constituted by combining the female screw body X and the female screw body Y to be penetrated through a male screw body A, by the female screw body Y provided with a slit 20 with a divided protrusion part 17 having a tapered 18 side wall of an outer shape part 16 for forming one screw part 15, while fastened faced to a recess 7 of the female screw body X with the recess 7 provided in a side wall of an outer shape part 6 for forming one more screw part 5, by a taper 8, in the male screw body A where the male screw body A is penetrated through the tightening member G, in Fig 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is designed to prevent loosening of a screw that should not loosen from a fastened state when a male screw body and a female screw body are engaged with each other even when subjected to vibration or impact. The present invention relates to a screw locking mechanism that can be used for electrical, mechanical, architectural, and related structures including aerospace rockets and bullet trains as a range of use.

  Conventionally, there are various types in which a male screw and a female screw are engaged with each other and a loosening prevention means is incorporated. Among them, techniques close to the present invention include Patent Documents 1 to 6 below.

  In Patent Document 1, since the anti-loosening plate attached to the female screw adheres to the male screw while being elastically deformed and is tightened, tightening requires a large torque from the beginning. It becomes difficult, and it does not reach the force to be a stopper to prevent sufficient loosening, but it also turns easily on the loose side, so it does not become strong loosening prevention, and the structure becomes complicated and the manufacturing cost increases. Have.

  In addition, Patent Document 2 regulates the movement between the fastening surface and the mounting member by biting a hard member between them, and obtains the effect of rotation prevention. Since it must be soft, the hard member falls down, so a gap is likely to occur between them, and soft washers such as plastic and rubber become tattered with changes over time etc. It has a drawback.

  For Patent Documents 3 and 4, after passing a mounting member and a nut or a washer through a male screw, the side surface of the other nut is provided with a protrusion on the other side, and the protrusion is pressed into the screw hole of the nut or washer. The projecting part is designed to increase the locking effect by the frictional force with which the projecting part is wound on the external thread. This is because the dimension of the nut or washer that enters the projecting part in particular with respect to the dimension in the outer diameter direction. If it is not appropriate, it will not enter, and a gap will be formed between the mounting member.

  In addition, if the dimension of the protruding portion that bites into the nut or the washer is increased, it becomes difficult to bite into the nut or the washer. For example, if the protruding portion is thick, it is difficult to deform. On the contrary, if the protrusion is thin, it has a drawback that it is difficult to generate a frictional force that prevents rotation.

  These conventional background arts have their respective drawbacks and cannot be said to be a technique that exhibits a sufficient effect for preventing loosening.

  Patent Document 5 has been filed by the applicant of the present patent application and was invented to solve the conventional drawbacks. However, this disadvantage is complicated by using a lock rod for the female screw body. Therefore, there is a drawback that productivity becomes worse.

  As is apparent from the specification of this known example, Patent Document 6 discloses a loosening effect that prevents the loosening effect by combining the convexity of the first nut and the concaveity of the second nut in an eccentric manner. Invented a stop double nut, but as shown in this known example, this eccentric double nut has a minute gap in the eccentric fitting part after fitting, so it solves them As a means to do this, the other side of the eccentric direction is covered with resin or soft metal to compensate for the drawbacks, but it has sufficient strength and structure to sufficiently cope with the stress is not.

  In addition, as is clear from this known example, when the diameter of the male screw is thermally expanded, the tightening action may be inferior to the loosening prevention effect of the commonly used double nut. Even if it is reinforced with a soft metal, it has a drawback that cannot be said to be sufficient.

JP 59-133161 JP-A-8-135642 JP-A-11-315820 JP2003-294221A JP-A-2005-249084 JP 11-6516 A

  In this invention, there are various types of female screw bodies that prevent loosening of a fastening member that is passed through a male screw body and tightened with a female screw body in practice, but they are sufficient to prevent loosening. It cannot be said that it has individual drawbacks.

  As described in the background art, there is no screw locking mechanism that exhibits a sufficient locking function as a locking mechanism and has some drawbacks.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a screw locking mechanism that exhibits a certain function capable of solving the respective drawbacks of the background art.

  The first invention of the object is to tighten a fastening member with a male screw body and a female screw body, wherein one female screw body is a part of an outer shape portion having a screw portion and an outer shape portion constituting the screw portion. Provided with slits that are divided into a plurality of portions with the side wall as a protruding portion, and the other female screw body has a concave portion that forms the side wall of the screw portion and the outer shape by a taper. And a screw locking mechanism characterized in that the fastening member is fastened by the two female screw bodies.

  According to a second aspect of the present invention, when the fastening member is tightened with a male screw body and a female screw body, one female screw body is a part of the outer shape portion having a screw portion and an outer shape portion constituting the screw portion. A slit that is divided into a plurality of portions with the side wall as a protruding portion is provided, and the other is passed through a washer body having a recess formed by a taper in combination with a male screw body, and the fastening member is tightened by the female screw body This is achieved by a screw locking mechanism.

  A third invention of the object is achieved by a screw locking mechanism according to claim 1 or 2, wherein a groove is provided in the protruding portion so that the protruding portion is easily bent. The

  The present invention is an invention of a screw locking mechanism in which a male screw body A is passed through a fastening member so that the female screw body fastened with two female screw bodies does not loosen, and the male screw body A is attached to the fastening member. One threaded male screw body A is fastened with a female screw body X provided with a recess formed with a taper on the side wall of the outer shape forming the threaded portion, and facing the recess. A combination of the female screw body Y provided with a plurality of slits obtained by dividing the protruding portion of the side wall of the outer shape part forming the screw part is passed through the male screw body A to generate a fastening action.

  Thus, when the protruding portion of the female screw body Y is screwed into the concave portion of the female screw body X, the screw portion of the female screw body X and the screw portion of the female screw body Y are the same as the loosening prevention effect of a general double nut. However, the difference here is that the screw of the female screw body Y is provided with a plurality of slits that divide the protruding portion by the protruding portion entering the recessed portion. The screw locking mechanism of the female screw body X and the female screw body Y is obtained by adhering to the screw portion of the male screw body A so that the portion is caulked by the concave portion of the female screw body X.

  Various conditions are conceivable as conditions for screwing the protruding portion of the female screw body Y into the concave portion of the female screw body X, but the protruding portion of the female screw body Y is screwed into the concave portion of the female screw body X. As a result, since the protruding portion is divided into a plurality of slits, the screw portion of the protruding portion bends by the radial gap, so that the protruding portion is bent and deformed, and the screw The gap between the meshing directions of the female screw body is tightened, but as a final tightening, there is a part of tightening the protruding portion of the female screw body Y at the concave portion of the female screw body X, and by tightening these, The female screw body X and the female screw body Y can be fixed so that the threaded portion of the protruding portion is fastened to the threaded portion of the male screw body A, and the two female screw bodies X and the female screw body Y With a double nut tightening effect, a strong screw locking mechanism can be obtained. Is shall.

  In the next invention, a male screw body A having a male screw body A passed through a fastening member, and a concave portion of a washer body C provided with a concave portion in which a side wall of an outer shape forming a through hole is formed by a taper. The other is fastened face to face, and the other is a male screw body A in combination with a female screw body Z provided with a plurality of slits by dividing a protruding portion formed by a taper on the side wall of the outer shape forming the screw portion. And a fastening action is generated.

  As a condition for screwing the protruding portion of the female screw body Z into the recess of the washer body C, various cases are conceivable, but when the protruding portion of the female screw body Z is screwed into the recess of the washer body C, Since the protruding portion is divided into a plurality of slits, the screw portion of the protruding portion bends by the radial gap, so that the protruding portion bends and deforms, and the engagement of the screw However, as a final tightening, there is a part for tightening the protruding portion of the female screw body Z at the concave portion of the washer body C. By tightening these, the washer body C is tightened. And a female screw body Z can be secured to the threaded portion of the male threaded body A so that the threaded portion of the projecting portion is crimped, thereby providing a strong screw locking mechanism. is there.

  Since the caulking action of the present invention causes a deflection by pressurizing the protruding portion of the female screw body Y, the reaction force of the pressing portion causes a force that strongly presses the other recessed portion. Since it works, a force that does not cause looseness is generated.

  Therefore, this screw locking mechanism exhibits a very effective effect that can cope with a change in environmental conditions such as a thermal action by the effect of the caulking action and the double nut action applied to the screw portion.

  The present invention is like an apparatus, and the fastening part is composed of two parts, and one of the other parts is incorporated into the part of the apparatus that is incorporated from the beginning, and the other is incorporated. As described above in the invention so far, if the slit part divided into a plurality of parts is provided with the side wall of the external part having the external part constituting the screw part and the external part constituting the screw part as a protruding part A screw locking mechanism can be obtained.

  This invention is an invention of a screw locking mechanism in which a fastening member tightened with two female screw bodies through a male screw body A does not cause loosening.

  The first aspect of the invention is an internal thread body A in which a male thread body A is passed through a fastening member, one of which is a female thread body X provided with a recess formed by a taper on the side wall of the outer shape forming the thread section. The other is fastened to face the concave portion, and the other is combined with the female screw body Y provided with a plurality of slits obtained by dividing the protruding portion of the side wall of the outer shape forming the screw portion, and passed through the male screw body A. The fastening action is generated.

  The fastening is performed by first tightening the female screw body X while turning the fastening member to tighten the fastening member. After the fastening, the protruding portion of the female screw body Y is provided in the concave portion of the female screw body X so that the fastening is not loosened. Fastening is achieved by screwing in.

  Thus, when the protruding portion of the female screw body Y is screwed into the concave portion of the female screw body X, the screw portion of the female screw body X and the screw portion of the female screw body Y are the same as the loosening prevention effect of a general double nut. However, the difference here is that the protruding portion of the female screw body Y provided with a plurality of slits dividing the protruding portion is provided by the protruding portion entering the recessed portion. The screw portion of the female screw body X and the female screw body Y becomes a locking mechanism of the female screw body X by fixing the protruding screw portion to the screw portion of the male screw body A so as to be crimped by the concave portion of the female screw body X.

  Various conditions are conceivable as conditions for screwing the protruding portion of the female screw body Y into the concave portion of the female screw body X, but the protruding portion of the female screw body Y is screwed into the concave portion of the female screw body X. Eventually, since the protruding part is divided into a plurality of slits, the threaded part of the protruding part is bent by the gap in the radial direction, so that the protruding part is bent and deformed, The gap between the screw meshing directions will be tightened, but there is also a part that tightens the protruding part of the female screw body Y with the concave part of the female screw body X as the final tightening, and tighten these By using the female screw body X and the female screw body Y, the screw portion of the male screw body A can be fastened so that the screw portion of the protruding portion can be fastened, and the tightening effect of the double nut can tighten the screw. Can be obtained.

  Although there is no gap between the upper portions of the side walls of the female screw body X and the female screw body Y, it can be fastened and fixed, but it can also be provided with a gap.

  Therefore, whether or not the gap is provided can provide a screw locking mechanism depending on how the female screw body X and the female screw body Y are tightened according to the conditions at that time.

  In the second aspect of the invention, the washer body C is provided with a recess formed by forming a side wall of an outer shape portion with a taper in the male screw body A through which the male screw body A is passed through the fastening member. The other is combined with the female screw body Z provided with a plurality of slits by dividing the protruding portion with the side wall of the outer shape forming the screw portion as the protruding portion. Thus, the fastening action is generated through the male screw body A.

  The fastening is performed by first tightening the female screw body X while turning the female screw body X to tighten the fastening member. After this fastening is completed, the protruding portion of the female screw body Z is screwed into the recess of the washer body C so that the fastening is not loosened. The conclusion can be established by putting it in.

  When the protruding portion enters the recessed portion, the threaded portion of the female screw body Z provided with a plurality of slits obtained by dividing the protruding portion formed by the taper is swaged by the recessed portion of the washer body C, and the male screw body A The screw locking mechanism of the female screw body Z can be obtained by adhering to the screw portion.

  As a condition for screwing the protruding portion of the female screw body Z into the recess of the washer body C, various cases are conceivable, but when the protruding portion of the female screw body Z is screwed into the recess of the washer body C, The protruding portion is divided into a plurality of slits so that the screw portion of the protruding portion bends by a gap in the radial direction, and therefore, between the amount of deformation and the meshing direction of the screw However, as a final tightening, there is a part for tightening the protruding portion of the female screw body Z at the concave portion of the washer body C. By tightening these, the washer body C and the female screw are tightened. A strong screw locking mechanism can be obtained by the tightening effect of the caulking action that can be fixed so that the threaded portion of the protruding portion is caulked to the threaded portion of the male screw body A by the body Z.

  Although there is no gap at the top of the side wall and it can be fastened and fixed, it can also be provided with a gap.

  Therefore, whether or not to provide a gap is obtained by a screw locking mechanism by the female screw body Z and the washer body C according to the conditions at that time.

The present invention will be described with reference to the drawings. FIG. 1 shows a male screw body A in which a male screw body A is passed through a fastening member G. One is a recess 7 with a taper 8 on a side wall of an outer shape portion 6 forming a screw portion 5. A female provided with a slit 20 in which a projecting portion 17 having a tapered side wall of an outer shape portion 16 forming another screw portion 15 which is fastened facing the concave portion 7 of the female screw body X provided with a slit 18 is divided. The screw body Y and the female screw body X and the female screw body Y are combined and passed through the male screw body A to constitute a screw locking mechanism.

  The fastening is performed by first tightening the fastening member while turning the female screw body X, and after the fastening is finished, the protruding portion of the female screw body Y is formed in the concave portion 7 of the female screw body X so that the fastening is not loosened. Fastening can be achieved by screwing 17 in.

  Thus, when the protruding portion 17 of the female screw body Y is screwed into the concave portion 7 of the female screw body X, the screw portion 5 of the female screw body X and the screw portion 15 of the female screw body Y are loosened from a general double nut. Although it acts in the same way as the stopping effect and exhibits the locking effect, the difference here is that the protruding portion 17 formed by the taper 18 is divided by the protruding portion 17 entering the recessed portion 7. The screw portion 15 of the female screw body Y is fixed to the screw portion 19 of the male screw body A so that the screw portion 15 of the female screw body X is caulked by the concave portion 7 of the female screw body X. A lock mechanism is obtained.

  As a condition for screwing the protruding portion 17 of the female screw body Y into the concave portion 7 of the female screw body X, various cases can be considered, but the protruding portion 17 of the female screw body Y is inserted into the concave portion 7 of the female screw body X. When the screw is screwed in, the protruding portion 17 is divided into slits 20, so that the screw portion of the protruding portion is bent and deformed by the gap in the radial direction, and the gap portion between the meshing directions of the screws. However, as a final tightening, there is a portion for tightening the protruding portion 17 of the female screw body Y with the concave portion of the female screw body X. By tightening these, the female screw body X and the female screw body are tightened. The screw portion 15 of the protruding portion 17 can be fastened to the screw portion 19 of the male screw body A by Y, and the double nut can be tightened by the two female screw bodies X and the female screw body Y. A strong screw locking mechanism having an attaching effect is obtained.

  The gap 30 at the upper part of the side wall of the female screw body X and the female screw body Y can be completely tightened and fixed as shown in FIG. 2, but the gap 30 can also be provided.

  Therefore, whether or not the gap 30 is provided is a screw locking mechanism by tightening the female screw body X and the female screw body Y according to the use conditions at that time.

  FIG. 8 shows an application example of the present invention. This application example is different from FIG. 1 in the shape of the female screw body Y, and a protruding portion 47 provided on the side wall of the outer portion 46 of the screw portion 45 is formed. A groove 44 is provided in the periphery to make the screw portion 45 of the protruding portion 47 easy to bend as a whole, and the protruding portion 47 of the female screw body Y is screwed into the concave portion 27 of the female screw body X. The screw portion 45 of the protruding portion 47 is firmly fixed to the screw portion 19 of the body A.

  In this example, a slight taper is provided at the corner 42 of the protruding portion 47. However, the corner of the protruding portion 47 does not need to be provided with a taper and may be rounded.

  FIG. 9 shows a second application example of the present invention. In this application example, the concave portion 37 of the female screw body X and the taper 38 and the taper 58 of the protruding portion 57 of the female screw body Y are the same or slightly different. This indicates that the present invention can be achieved even if tightened, and a groove 54 is provided in order to make the tapered portion 58 of the protruding portion 57 easier to bend.

  In this example, the taper 38 is provided up to the screw portion 35.

  FIG. 10 shows a third application example of the present invention. Contrary to the conventional case, the fastening member is fastened with the female screw body Y, and the protruding portion of the female screw body Y is connected to the female part. In this modification, the protruding portion of the female screw body Y is fastened with the female screw body X.

  FIG. 10 differs from what has been described with reference to FIGS. 1 to 9 in that the female screw body Y has a round outer shape and is provided with a tool mounting portion 83 and the protruding portion 87 is divided by six slits 20. By increasing the number of divisions in this way, the protruding portion 87 can be easily bent and can be firmly fixed so as to be caulked to the screw portion 19 of the male screw body A when tightened by the concave portion 77 of the female screw body X. It is something that can be done.

  In this way, even if the female screw body Y is tightened later with the female screw body X, the female screw body X can be fixed to the projecting portion of the female screw body Y so that the screw can be loosened. It is possible to obtain a screw locking mechanism that does not come out even if it is added.

  FIG. 13 shows the fourth application example of the present invention, in which a male screw body A is passed through a fastening member, and one of the male screw bodies A is a concave portion in which an outer shape portion 106 for forming a through hole 105 is formed by a taper 108. The other side of the washer body C provided with 107 is fastened to face the concave portion 107, and the other is not provided with a taper at the corner 112 of the protruding portion 117 forming the side wall of the outer shape portion 116 forming the screw portion 115. Although it is good, the female screw body Z formed by the slit 20 into which the protruding portion 117 is divided is combined and passed through the male screw body A to generate a fastening action.

  Fastening is performed by first tightening the female screw body X while turning it to tighten the fastening member. The protruding portion 117 of the female screw body Z is screwed into the concave portion 107 of the washer body C so that the fastening member does not loosen after the fastening is completed. This is the conclusion.

  As the protruding portion 117 enters the recessed portion 107, the male thread Z of the female screw body Z formed by the slit 20 that divides the protruding portion 117 formed by the corner 112 is caulked by the recessed portion 107 of the washer body C. By fixing to the screw part 19 of the body A, a screw locking mechanism of the female screw body Z is obtained.

  Various conditions are conceivable for screwing the protruding portion 117 of the female screw body A into the concave portion 107 of the washer body C, but the protruding portion 117 of the female screw body Z is screwed into the concave portion 107 of the washer body C. Eventually, since the protruding portion 107 is divided into a plurality of slits, the threaded portion of the protruding portion 117 bends by a gap in the radial direction, so that the protruding portion is bent and deformed. And the clearance between the screw meshing directions can be tightened, and there is a part for tightening the protruding portion 117 of the female screw body Z with the concave portion 107 of the washer body C as final tightening. By tightening the screw, the washer body C and the female screw body Z can fix the screw portion of the protruding portion 117 to the screw portion 109 of the male screw A so that the screw portion is tightened. Lock It can be configured.

The gap 50 at the upper part of the side wall can be fastened and fixed, but the gap 50 can be provided.

  Therefore, whether or not the gap 50 is provided depends on the use conditions at that time, and the female screw body Z and the washer body C serve as a screw locking mechanism.

  Since the caulking action of the present invention causes a deflection by pressurizing the protruding portion of the female screw body Y, the reaction force of the pressing portion causes a force that strongly presses the other recessed portion. Since it works, a force that does not cause looseness is generated.

  The present invention is like an apparatus, and the fastening part is composed of two parts, and one of the other parts is incorporated into the part of the apparatus that is incorporated from the beginning, and the other is incorporated. As described above in the invention so far, if the slit part divided into a plurality of parts is provided with the side wall of the external part having the external part constituting the screw part and the external part constituting the screw part as a protruding part A screw locking mechanism can be obtained.

  The screw lock mechanism in this invention is mainly made of materials such as iron and stainless steel, and it is a very effective function that can respond to changes in environmental conditions such as thermal action due to the effect of crimping action and double nut action applied to the screw part To demonstrate.

The longitudinal cross-sectional view which shows the process in which the fastening member G is fastened with the internal thread body X and the internal thread body Y of this invention. The longitudinal cross-sectional view which shows the state which fastened the fastening member G with the internal thread body X and the internal thread body Y of this invention. The front view of the internal thread body Y of FIG. The right view of the internal thread body Y of FIG. The left view of the internal thread body Y of FIG. The front view of the internal thread body X of FIG. The left view of the internal thread body X of FIG. The longitudinal cross-sectional view which shows the process in which the fastening member G is fastened with the internal thread body X and the internal thread body Y which shows the example 1 of an application of this invention. The longitudinal cross-sectional view which shows the process in which the fastening member G is fastened with the internal thread body X and the internal thread body Y which shows the application example 2 of this invention. The longitudinal cross-sectional view which shows the process in which the fastening member G is fastened with the internal thread body X and internal thread body Y which shows the example 3 of an application of this invention. FIG. 11 is a left side view of the female screw body Y of FIG. 10. The right view of the internal thread body X of FIG. The longitudinal cross-sectional view which shows the process in which the fastening member G is fastened with the internal thread body Y and the washer body C which show the example 4 of an application of this invention. The left view of the washer body C of FIG.

Explanation of symbols

5.25.35.75: Screw part 6.26.36: External part 7.27.37.77: Concave part 8.28.38: Taper 15. 45.55.85: Screw part 16.46: External part 17.47.57.87: Protruding part 18.58: Taper 19: Screw part 20: Slit 30.40.50: Gap 42.102: Square 44.54: Groove 105: Through hole 106: External part 107: Concave part 108: Taper 115: Screw part 116: External part 117: Protruding part A: Male screw body X: Female screw body Y: Female screw body Z: Female screw body C: Washer body G: Fastening Element

Claims (3)

  In tightening the fastening member with the male screw body and the female screw body, one female screw body is divided into a plurality of parts with the side wall of the outer portion having the screw portion and the outer portion constituting the screw portion as a protruding portion. The two female screw bodies are provided with divided slits, and the other female screw body has a concave portion that forms a side wall of the screw portion and the outer shape by a taper. A screw locking mechanism characterized in that a fastening member is fastened by two female screw bodies.   In tightening the fastening member with the male screw body and the female screw body, one female screw body is divided into a plurality of parts with the side wall of the outer portion having the screw portion and the outer portion constituting the screw portion as a protruding portion. A screw provided with a split slit and a washer body having a recess formed by a taper in combination with a male screw body, and a fastening member being tightened by the female screw body Lock mechanism. 3. The screw locking mechanism according to claim 1, wherein a groove is provided in the protruding portion so that the protruding portion is easily bent.

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