JP2002031120A - Spring washer having projection, and screws having locking mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide screws having a locking mechanism with reliable stop locking property. SOLUTION: A plurality of projections are provided on both face and back sides of a spring washer, or either side thereof. The projections on one side are engaging projections engaged with locking projections of the screws, and the projections on the other side are biting projections capable of biting a tightening work to be tightened by the screws. The screws having the locking mechanism have recesses capable of accommodating a flat washer or the spring washer with or without projections on the back side of the screws. A locking projection is provided in the recess. The locking projection in the recess has a ride-over inclined surface which is rotatable over the tightening inclined surface of the engagement projections of the flat washer or spring washer having the projections in the recess, and a loosening regulation part which is locked to a loosening regulation surface of the engagement projection for regulating the rotation of the screws in the loosening direction is provided opposite to the ride- over inclined surface. A locking projection is provided on a back side of an outer circumferential wall of the recess. The spring washer is built in the back side of a bolt and a nut.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in spring washers and screws such as bolts, nuts, screws, or screw-type tacks (for example, tacks for golf shoes) used in buildings, railway rails, agricultural equipment and the like. Regarding the improvement of
The present invention relates to an improvement in such a locking structure.

[0002]

2. Description of the Related Art When bolts and nuts are tightened, a flat washer or a spring washer is usually interposed on the back surface thereof. Since the flat washer has a thin ring shape, if the bolts and nuts are strongly tightened, they may run idle and may not always be sufficiently tightened. Since the spring washer is partially cut off and its end is open outward in the thickness direction,
Even if bolts and nuts are strongly tightened, they do not run idle like flat washers, and because of their spring characteristics, they are more securely tightened than flat washers. However, in any case, the bolts and nuts may be loosened due to vibration after tightening, and this cannot be avoided. Therefore, the inventor of the present application has developed bolts and nuts having a locking mechanism in order to prevent locking. The main example is shown in FIG.

FIG. 10 shows a washer-integrated bolt in which a flat washer 53 with a projection provided with a front projection 51 and a rear projection 52 is incorporated into the back side of the head 55 of the bolt 54 so as not to come off. A number of grooves 56 and ridges 57 are provided on the back surface of the head 55 to engage with the surface projections 51, and when the bolt 54 is rotated forward, the ridges 57 rotate while riding over the surface projections 51 of the washer 53, and Tightening is performed on the tightening target 58, the back projection 52 of the washer 53 bites into the tightening target 58, the groove 56 of the bolt 54 and the front projection 51 of the washer 53 are locked, and the reverse rotation of the bolt 54 is restricted. , So that the bolts 54 are not loosened.

The inventor has also developed a washer-incorporated nut in which a flat washer with a projection is incorporated on the back side of the nut so as not to come off. Again, when the nut screwed to the bolt is rotated and tightened, the protrusion on the back of the washer cuts into the object to be tightened, the groove of the nut and the surface protrusion of the washer are locked, and the reverse rotation of the nut is regulated, and the nut The tightening is not loosened.

In the above-mentioned conventional example, a washer is incorporated in a bolt or a nut. However, this washer can be provided separately from the bolt or the nut, and can be used in combination with the back side of the bolt or the nut when used. . The inventor of the present invention also provided a screw-type stud 60 with a locking mechanism shown in FIG.
Also developed. This is screwed into the back surface of the golf shoe, and a screw rod 62 is protruded from one side of the head 61,
A projection 63 is protruded on the opposite side, is incorporated into the screw rod 62 side so as not to come off an umbrella-shaped washer (washer) 64, and locking projections 65 and 66 are formed on the head 61 and the washer 64 so as to mesh with each other. The head 61 is rotated so that the screw rod 62
Is screwed into the sole of the shoe, the pawl 67 of the washer (washer) 64 bites into the sole of the shoe, and the locking projections 65 and 66 are engaged with each other to prevent loosening. Although not shown, the present inventor has also developed various screws with a locking mechanism in which the number and angles of the locking projections are devised.

[0006]

The above-mentioned screws with a locking mechanism have a sufficient locking effect as compared with those having no locking mechanism, and are not inconvenient.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a spring washer with a projection, which has a more reliable locking effect than conventional screws with a locking mechanism, a nut, a bolt, a screw, and a screw with a locking mechanism. It is an object of the present invention to provide various screws such as screws such as studs, and screws with built-in washers in which spring washers are incorporated in the screws.

According to a first aspect of the present invention, there is provided a spring washer with a projection, wherein the spring washer has a plurality of projections on both front and rear surfaces 2, 3 or one surface 2 or 3, and the projection on one surface 2 or 3 is a bolt or nut. The projection on the other surface is a biting projection 8 that can bite into an object 7 to be tightened by tightening with the screws 4. The upwardly inclined tightening slope 9 on which the locking projections 5 of the screws 4 can get over during the tightening rotation by the class 4, and a regulating surface that locks with the locking projections 5 to restrict the rotation of the screws 4 in the loosening direction. 10 is provided.

According to a second aspect of the present invention, in the spring washer with the projection according to the first aspect, the angle θ of the regulating surface is equal to or greater than the angle of the tightening slope 9 of the engagement projection 6. It is a sudden thing.

According to a third aspect of the present invention, there is provided a screw with a locking mechanism according to a third aspect of the present invention, wherein a flat washer having a projection on both the front and back surfaces or a projection on one surface is provided on the back side of the screw 4 such as a bolt or a nut. A flat washer or a spring washer 1 is provided with a projection spring washer 11 having projections on both front and back surfaces 2, 3 or one surface 2 or 3, or a recess 12 capable of accommodating a spring washer without projections.

According to a fourth aspect of the present invention, there is provided a screw having a locking mechanism according to the third aspect, wherein the locking projection 5 is provided in the recess 12 of the screw 4.

According to a fifth aspect of the present invention, there is provided a screw with a locking mechanism according to the fourth aspect, wherein the locking projection 5 in the recess 12 is provided with a projection accommodated in the recess 12. There is provided a climbing slope 13 which is rotatable over the fastening slope 9 of the meshing projection 6 of the flat washer or the spring washer 11 with a projection, and is provided on the regulating surface 10 of the engaging projection 6 on the opposite side of the locking projection 5 from the climbing slope 13. It is provided with a looseness restricting portion 14 which locks and restricts rotation of the screws 4 in the loosening direction.

According to a sixth aspect of the present invention, there is provided a screw with a locking mechanism according to any one of the third to fifth aspects, wherein the outer periphery of the recess formed on the back side of the screw is provided. The locking protrusion 41 is formed on the back surface of the wall 40.

According to a seventh aspect of the present invention, there is provided a screw with a locking mechanism according to any one of the third to fifth aspects of the present invention. A flat washer, a spring washer 11 with a projection or a spring washer 21 without a projection is incorporated so as to be slidable in the axial direction of the screws 4.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment of a Spring Washer with a Projection) A first embodiment of a spring washer with a projection of the present invention will be described in detail with reference to FIG. As shown in FIG. 1A, the spring washer 11 with projections
A ring-shaped spring washer 1 that has been cut off
A plurality of projections 6 and 8 are provided on both the front surface 2 and the back surface 3 of the front surface, and both end portions 22 and 23 of the cut portion are extended in the thickness direction of the spring washer 1 to provide spring properties. Is a mating projection that can be engaged with the locking projection 5 of the screw 4 such as a bolt, a screw, a nut, or a screw-type tack, and the projection 8 on the other surface is a fastening target 7 ( FIG. 7) shows a biting projection that can bite.

As shown in FIG. 1B, the engaging projection 6 is associated with a tightening slope 9 which is inclined upward in the rotation direction when the screw 4 is tightened, and a locking projection 5 (FIG. 2A) of the screw 4. There is a regulating surface 10 that stops and regulates the rotation of the screws 4 in the reverse direction to restrict the screws 4 from loosening. Although the angle α of the tightening slope 9 shown in FIG. 1B is smaller than the angle θ of the regulating surface 10, it can be the same. The angle α of the tightening slope 9 is set to an arbitrary angle of an upward slope at which the locking projection 5 formed on the back surface of the screw 4 can ride over and rotate when the screw 4 is rotated in the tightening direction. Regulatory surface 1
The angle θ of 0 is an angle at which the locking projections 5 of the screws 4 are locked and cannot rotate in the reverse direction (rotate in the loosening direction), or at an angle that is difficult to rotate in the reverse direction. When the angle θ is 90 degrees, reverse rotation is most difficult (less loose). If the meshing projections 6 and the biting projections 8 on the front and back surfaces of the spring washer 1 are formed in the same shape, the spring washer 11 with projections can be used with either side up or down. It is preferable that the meshing projection 6 and the biting projection 8 have a higher hardness by quenching or the like.

The spring washer 11 with a projection shown in FIG. 1A has three engagement projections 6 and three biting projections 8 on each of the front and rear surfaces 2 and 3 of the spring washer 1.
Although the number of the projections 6 and 8 can be less or more than three, if the number of the engagement projections 6 is reduced to about three to four, the combination with the bolt as shown in FIG. In the case where the bolt is used, the engagement resistance of the bolt with the locking projection 5 is reduced, and the bolt is easily rotated, and can be easily rotated with a small force. In addition, the noise generated during rotation is reduced. These are the same when used in combination with a nut. When the number of the biting projections 8 is also about three to four, it becomes easy to bite into the tightening target 7 when used in combination with a bolt or a nut. As the number increases, it becomes difficult to loosen, but the bite resistance to the fastening target 7 increases, making it difficult to bite.

The number of the engagement projections 6 and the number of the biting projections 8 can be different. The meshing projection 6 and the biting projection 8 shown in FIG. 1A are provided at positions just opposite to the front and back surfaces of the spring washer 1, but both projections 6 and 8 are displaced between the front and back surfaces of the spring washer 1. It can also be protruded.

Spring washer 1 with projection of FIG.
1 is to use a wire as a material, forging it, projecting a projection, cutting it, expanding it in the thickness direction, or processing an existing flat washer or spring washer to attach a projection. Can also. If an existing flat washer or spring washer is used, the manufacturing cost can be reduced.

(Embodiment 2 of Projection Spring Washer) The projection spring washer 11 of the present invention may be provided with a projection on only one of the front and back surfaces of the spring washer 1. In this case, the projection can be used as a meshing projection 6 that meshes with the locking projection 5 of the screw 4, or can be used as a biting projection 8 that can bite into a fastening target 7 that is fastened by the screw 4. .

(Embodiment 1 of screws with locking mechanism) FIG. 2 shows a first embodiment of screws with locking mechanism according to the present invention.
A detailed description will be given based on (a) and (b). In the first embodiment, the screws 4 are bolts. The bolt 12 has a recess 12 formed concentrically with the screw rod 25 on the back side of the head 24 and on the outer periphery of the screw rod 25. The depth of the recess 12 is slightly smaller than the thickness of the spring washer 11 with the projection. When the spring washer 11 with the projection is accommodated inside the spring washer 11, the lower portion of the spring washer 11 with the projection is slightly lower than the bottom of the recess 12. Protruding into
When the bolt 4 is rotated and tightened, the spring washer 11 with a projection is pushed into the object 7 to be tightened, and the bite projection 8 of the washer 11 bites into the object 7 to be tightened.

A large number of locking projections 5 are formed radially on the inner surface of the recess 12. This locking projection 5 is shown in FIG.
As shown in FIG.
Are formed. The fitting groove 28 is formed in such a shape and depth that the meshing projection 6 of the spring washer 11 with projection accommodated in the recess 12 can be fitted. This locking mountain 27
The number of the engagement grooves 28 is a multiple of the number of the engagement projections 6 of the spring washer 11 with projections. In this case, when the bolt 4 is rotated to tighten the spring washer 11 with projections in the recess 12, the number of projections is increased. Spring washer 1
The one engagement projection 6 can be just fitted into the fitting groove 28, and the fastening is stabilized.

The inner diameter of the recess 12 is slightly larger than the outer diameter of the spring washer 11 with the projection, so that the spring washer 11 with the projection is accommodated inside the spring washer 11. When the washer 11 is tightened, the bite projection 8 bites into the tightening target 7 while the diameter of the washer 11 is slightly widened, but the outer diameter of the washer 11 is expanded and its outer peripheral surface 29 (FIG. 1 a).
When the contact is made with the inner peripheral surface 30 of the concave portion 12, the washer 11 does not expand any more, so that the spring characteristics are ensured. The spring washer 11 is pressed against the inner peripheral surface 30 of the concave portion 12 by its restoring force by ensuring the spring characteristics,
The engagement protrusion 6 of the washer 11 is fitted into the fitting groove 28 in the recess 12.
And the regulating surface 10 (FIG. 1b) of the engagement projection 6 is engaged with the engagement projection 5 (FIG. 2b) of the bolt 4 to prevent the bolt 4 from rotating in the reverse direction. Is prevented from loosening. If the inner diameter of the concave portion 12 is too large than the outer diameter of the spring washer 11 with the projection, when the spring 4 in the concave portion 12 is tightened with the bolt 4, the diameter of the washer 11 is completely expanded in the concave portion 12 and becomes smaller. As a result, the restoring force of the spring characteristic is lost and the pressure contact of the recess 12 with the inner peripheral surface 30 becomes insufficient, and the engagement between the engagement projection 6 of the washer 11 and the inner surface of the recess 12 is performed. The engagement with the groove 28 becomes insufficient, the engagement between the regulating surface 10 of the engagement projection 6 and the engagement projection 5 of the bolt 4 becomes insufficient, and the bolt 4 rotates in the opposite direction to the tightening. There is a possibility that the bolts 4 may be easily loosened.

(Embodiment 2 of Screws with Loose Prevention Mechanism) This embodiment 2 is shown in FIG. In this embodiment, the screws 4 are nuts. The nut 4 has a concave portion 12 formed concentrically with the screw hole 31 on the back surface thereof and on the outer periphery of the screw hole 31. A locking projection 5 provided with a projection 28 is formed. The number and height of the locking ridges 27 and the number and depth of the fitting grooves 28 are arbitrarily selected as in the case of the bolt 4 shown in FIG.

(Third Embodiment of Screws with Loose Prevention Mechanism) In the first and second embodiments, the locking projection 5 having the locking ridge 27 and the fitting groove 28 is formed on the inner surface of the concave portion 12 of the bolt or the nut. However, the screws with a locking mechanism of the present invention are shown in FIG.
As shown in FIG. 5, on the inner surface of the recess 12 of the bolt or nut,
It is not necessary to form the locking projection 5 having the locking ridge 27 and the fitting groove 28. In this case, since the recess 12 of the bolt or nut cannot be locked with the locking projection 5 of the spring washer 11 with the projection, the loosening prevention effect is smaller than when the locking projection 5 is provided. By slightly increasing the outer diameter of the attached spring washer 11 to tighten the spring washer 11 with the projection housed in the recess 12 with the head 24 of the bolt 4, the diameter of the washer 11 is slightly widened outwardly. The biting projection 8 of the washer 11 bites into the tightening target 7. In this case, the spring washer 11 with the projection extending to the outside.
Is restricted so that the outer peripheral surface 29 (FIG. 1a) of the boss 4 does not come into contact with the inner peripheral surface 30 (FIGS. 4 and 5) of the concave portion 12 so as to spread out from the outer peripheral surface 29 (FIGS. 4 and 5). Thus, the bolt 4 is prevented from loosening. In the case of the bolt or nut of this embodiment or the bolt or nut shown in FIGS. 1 and 2, an existing spring washer having no projection can be used for the spring washer housed in the recess 12. . In this case, the spring washer cannot penetrate the tightening target, but the expansion of the spring washer is restricted by the inner peripheral surface 30 of the concave portion 12 and does not expand any more, so that the bolts and nuts are prevented from loosening. .

(Embodiment 4 of Screws with Locking Mechanism) The screws with locking mechanism of Embodiments 1 to 3 are cases where a spring washer with a projection or a spring washer without a projection is accommodated in the recess 12. In this embodiment, the washer housed in the recess 12 is a flat washer. Like the spring washer 11 with a projection shown in FIGS. 1 (a) and 1 (b), the flat washer may be provided with a projection on both the front and back surfaces of the washer, or provided with a projection on only one of the surfaces. The projection may not be provided on the surface. In the case where the projection is provided, the projection may be the same as the projection shown in FIGS. 1A and 1B or may be different therefrom.

Fifth Embodiment of Screws with Loose Stop Mechanism As a fifth embodiment, screws with a loose stop mechanism shown in FIGS. 6A and 6B are formed on the outer peripheral wall 40 of the recess 12 on the back surface of the screw 4. The anti-loosening projection 41 is also formed on the back surface. The anti-loosening projection 41 can also be easily tightened with a gentle inclination in the tightening direction (forward rotation direction), and a steep inclination in the loosening direction (reverse rotation direction) to prevent reverse rotation. is there. This loosening prevention projection 41 can also be provided on the back surface of the outer peripheral wall 40 of the recess 12 of the screw shown in FIGS.

(Embodiment 1 of Screws with Locking Mechanism Incorporating Washers) Embodiment 1 of this invention is shown in FIG. In this embodiment, the screws 4 are bolts, and the bolts 4 are assembled on the back side of the bolts 4 so as not to come out of the spring washers 11 with projections. This spring washer with projection 1
Numeral 1 is incorporated so as to be slidable in the axial direction of the bolt 4 and is accommodated in the recess 12 of the bolt 4. The meshing projection 6 is formed on the front surface of the spring washer 11 with the projection, and the biting projection 8 is formed on the rear surface. Also in this case, the depth of the concave portion 12 is made slightly smaller than the height of the separating portion of the spring washer 11 with the projection, and the lower portion of the spring washer 11 with the projection housed inside the concave portion 12 is
When the bolt 4 is rotated and tightened by rotating, the spring washer 11 with a projection is pushed into the object 7 to be tightened, and the bite projection 8 of the washer 11 bites into the object 7 to be tightened, and the meshing projection 6 The bolt 4 is locked with the locking projection 5 in the concave portion 12 so that the reverse rotation of the bolt 4 is restricted and loosening is prevented.

(Second Embodiment of a Screw with a Loose Locking Mechanism Incorporating a Washer) This second embodiment is shown in FIG. In this embodiment, the screws 4 are bolts, and the bolts 12 have no recesses 12 in which no locking ridges or fitting grooves are formed on the back side of the head.
A spring washer 11 with a projection is incorporated on the back side of the head so as to be slidable in the axial direction of the bolt. Also in this case, the relationship between the depth of the recess 12 and the thickness of the spring washer 11 with projections is the same as in the case of FIG. In this embodiment, there is no protrusion on the side of the concave portion 12 of the spring washer 11, but the reverse rotation of the bolt is restricted and the loosening of the bolt is prevented as in the case of the bolt of FIG.

(Third Embodiment of Screws with Locking Mechanism with Built-in Washer) This third embodiment is shown in FIG. In this embodiment, the screws 4 are bolts, and a recess 12 in which the locking projection 5 is not formed is formed on the back surface of the bolt 4, and a projection-free spring having neither the engagement projection 6 nor the biting projection 8 in the recess 12. The washer 21 is incorporated. Depth of recess 12 and spring washer 21 without projection
Is similar to that of FIG. In this case, there is no projection in the recess 12 that engages with the spring washer. However, when the bolt is tightened, the outer peripheral surface of the spring washer 21 without the projection comes into contact with the inner peripheral surface 30 of the recess 12, and further expansion occurs. As it is regulated, even if the bolt is tightened any further, there is no projection spring washer 2
1 does not spread in the lateral direction, and the loosening of the bolt 4 is restricted.

(Embodiment 4 of Screws with Locking Mechanism Incorporating Washers) In the present invention, the bolts shown in FIGS. 7 to 9 can be replaced with nuts to provide washers with screws. In this case as well, the locking projection 5 may or may not be provided in the concave portion 12, and the spring washer housed in the concave portion 12 may be provided with a projection or without a projection.

[0032]

The spring washer with a projection according to the first aspect of the present invention has the following effects. 1. Since the engaging projection of the spring washer with the projection engages with the locking projection of the screw, and the biting projection can bite into the object to be tightened, it is difficult to loosen after tightening with the screw. 2. When the screws are tightened, the locking projections of the screws can climb over the tightening slope of the spring washer with protrusions, so that the tightening is easy. Further, after the tightening, the regulating surface of the spring washer with the projection is locked with the locking projection of the screw, so that the rotation of the screw in the loosening direction is restricted.

The spring washer with a projection according to the second aspect of the present invention has the following effects in addition to the above effects. 1. Since the angle of the restricting surface is equal to or steeper than the angle of the tightening slope of the engagement projection, loosening of the screws after tightening is more reliably prevented.

The screws with a locking mechanism according to claim 3 of the present invention have the following effects. 1. Since there is a recess that can accommodate the spring washer,
Even if the screws are turned to tighten the spring washer in the recess, the spring washer does not spread outward any more when its outer peripheral surface contacts the inner peripheral surface of the recess, and the spring characteristics of the spring washer are secured. Classes are less likely to loosen. 2. Since there is a recess capable of accommodating a flat washer with or without a projection or a spring washer, the washer incorporated under the screws is accommodated in the recess. For this reason, even if a washer is assembled on the back surface side of the screws, the screws do not increase by that much, and are suitable for tightening in a narrow space.

The screws with a locking mechanism according to claim 4 of the present invention have the following effects in addition to the above effects. 1. Since the locking projection is provided in the recess, the locking projection locks to the regulating surface of the meshing projection of the spring washer with the projection,
In addition, since the concave portion restricts the spread of the spring washer, it serves as a double locking device, so that the screws are securely prevented from loosening.

The screws with a locking mechanism according to claim 5 of the present invention have the following effects in addition to the above effects. 1. The overhanging slope of the locking projection provided in the recess rotates over the fastening slope of the spring washer with the projection, so that the fastening is facilitated. In addition, since the loosening restricting portion of the locking protrusion is locked to the restricting surface of the spring washer with the protrusion, the loosening of the screws is more reliably prevented.

The screws with a locking mechanism according to claim 6 of the present invention are provided on the back surface of the outer peripheral wall of the concave portion formed on the back side of the screws.
Since the loosening prevention projection is formed, loosening is restricted by the loosening prevention projection, and the screws are not loosened.

The screws with a locking mechanism according to claim 7 of the present invention have the following effects. 1. Since the spring washer is incorporated in the recess of the screw, it is not necessary to incorporate the spring washer and the screw at the time of use, and the handling becomes easy. 2. Since the spring washer is incorporated so as to be slidable in the axial direction of the screws, the tightening of the screws automatically slides the spring washer toward the object to be tightened, thereby ensuring the tightening.

[Brief description of the drawings]

FIG. 1 (a) is a perspective view showing a first embodiment of a spring washer with a projection of the present invention, and FIG. 1 (b) is a partial detailed view of the spring washer.

FIG. 2 (a) is a first view of the screws with a locking mechanism according to the present invention.
FIG. 2B is a perspective view showing the embodiment, and FIG. 2B is a partially cutaway sectional view of the screws.

FIG. 3 is a perspective view showing a second embodiment of the screws with a locking mechanism according to the present invention.

FIG. 4 is a perspective view illustrating a bolt according to a third embodiment of the screws with a locking mechanism according to the present invention.

FIG. 5 is a perspective view showing a nut according to a third embodiment of the screws with a locking mechanism according to the present invention.

FIG. 6A is a fourth view of the screws with a locking mechanism according to the present invention.
The side view which shows embodiment of (a), (b) is the back view.

FIG. 7 is a cross-sectional view showing a first embodiment of screws with a locking mechanism incorporating a washer of the present invention.

FIG. 8 is a sectional view showing a second embodiment of a screw with a locking mechanism into which a washer of the present invention is incorporated.

FIG. 9 is a cross-sectional view showing a third embodiment of a screw with a locking mechanism incorporating a washer of the present invention.

FIG. 10 is a cross-sectional view showing an example of a conventional bolt provided with a locking mechanism.

FIG. 11 is a cross-sectional view showing a conventional screw type tack with a locking mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spring washer 2 Front surface of spring washer 3 Back surface of spring washer 4 Screws 5 Engagement projection 6 Engagement projection 7 Tightening object 8 Engagement projection 9 Tightening slope 10 Regulatory surface 11 Spring washer with projection 12 Depression 13 Riding over slope 14 Loosening regulation part 21 Spring washer without protrusion 40 Outer peripheral wall 41 Loosening protrusion θ Angle of regulating surface α Angle of tightening slope

Claims (7)

[Claims] 1. A spring washer (1) has a plurality of projections on both front and back surfaces (2, 3) or one surface (2 or 3), and the projections on one surface (2 or 3) are screws such as bolts and nuts. A mating projection (6) that can be engaged with a locking projection (5) of a class (4), and a projection on the other surface is a biting projection (6) that can be bitten into a tightening target (7) by a screw (4). 8), the engaging projection (6) has an upwardly inclined tightening slope (9) that the locking projection (5) of the screw (4) can get over when tightening and rotating by the screw (4), and the locking thereof. A spring washer with a projection, which has a regulating surface (10) which is engaged with the projection (5) and regulates rotation of the screws (4) in the loosening direction. 2. The spring washer with projections according to claim 1, wherein the angle (θ) of the regulating surface (10) is equal to or greater than the angle (α) of the tightening slope (9) of the engagement projection (6). A spring washer with a projection, which is sharp. 3. A flat washer with a projection, a flat washer without a projection, a flat washer without a projection, or a spring washer (1) on the back side of screws (4) such as bolts and nuts. Loosening characterized by having a spring washer with a projection (11) on the front and back surfaces (2, 3) or one surface (2 or 3) or a spring washer without a projection (12). Screws with locking mechanism. 4. A screw with a locking mechanism according to claim 3, wherein the locking projection is provided in the recess of the screw.
Screws with a locking mechanism, characterized in that a screw is provided. 5. The screw with a locking mechanism according to claim 4, wherein the locking projection (5) in the recess (12) is provided with the recess (1).
2) There is a climbing slope (13) that can rotate over the tightening slope (9) of the meshing projection (6) of the flat washer with projection or the spring washer with projection (11) housed therein. ) On the side opposite to the climbing slope (13), on the restricting restricting surface (10) of the meshing projection (6) to restrict the screws (4) from rotating in the loosening direction. Screws with a locking mechanism. 6. The screw with a locking mechanism according to claim 3, wherein a locking projection (4) is provided on the back surface of the outer peripheral wall (40) of the recess formed on the back side of the screw.
Screws with a lock-in mechanism of a washer built-in type, wherein 1) is formed. 7. A flat washer with or without a projection or a spring washer with a projection in a recess (12) of a screw with a locking mechanism according to any one of claims 3 to 5. Or spring washer without projection (21)
, Which are slidably assembled in the axial direction of the screws (4).