JP2017110787A - Washer, nut, bolt, nut with washer and bolt with washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent looseness of either a bolt or a nut.SOLUTION: Many washer protrusions 6 are arranged in a radial manner in a surface peripheral direction at a washer, the washer protrusions can be engaged with many head protrusions formed in a radial manner in a peripheral direction of either a head part rear surface of a nut or a head part rear surface of a bolt. After fastening of either the nut or the bolt, a washer 1 causes the engaged state to be hardly loosened or not to be loosened. The washer protrusions 6 have a mountain-shape in which a raising crossing part of a riding-over slant surface 9, an engaging surface and both surfaces have a ridge line part 11 and a descending crossing part has a valley part. The riding-over slant surface is placed before a fastening rotation direction of either a nut or a bolt, the engaging surface is placed after the fastening rotating direction of either the nut or the bolt than the ridge line part, and the washer has the ridge line part 11 and the valley 12 that are circular-arc in shape.SELECTED DRAWING: Figure 1

Description

  The present invention relates to screws, in particular, washers, nuts, bolts, nuts with washers, and bolts with washers.

  Conventionally, there are various types of structures for preventing loosening of screws, and a structure in which a protrusion engaging with another member is provided is known (Patent Document 1). 5 (a) and 5 (b) of the same document show a bolt having a head protrusion on the back surface of the bolt head, and FIG. 6 shows a nut having a head protrusion on the back surface of the nut head. No. 3 discloses a washer having a washer protrusion on the surface of the washer that meshes with the head protrusion. When the bolt or nut is tightened, the head protrusion engages with the washer protrusion so that the bolt or nut can be prevented from loosening.

Japanese Patent No. 3474341

  Each of the head projections and washer projections of the screws disclosed in Patent Document 1 (sometimes collectively referred to as “projections”) is a chevron with a sharp tip (ridge line portion) (end-face shape triangle). Since the head is elongated in the radial direction of the head, such as a washer, nut, or bolt: the same applies hereinafter), there is a difficulty in that the tip is likely to be chipped or crushed (easy to be lost). Defects at the tip are undesirable because they cause loosening of the screws. In addition, since the ridge line portion molding portion of the press mold for molding these screws is sharp, there is a difficulty that the portion is easily lost and is difficult to hold (the number of pressable times is small). Defects in the press die are not preferable because they lead to a decrease in accuracy of the molded product and cause looseness.

  The problem to be solved by the present invention is that the ridge line portions of the projections of screws such as washers, nuts, bolts, etc. are not easily lost, the ridge line portion molding portion of the press mold is difficult to be lost, the mold is good, and the press molding is performed many times. It is to provide a washer, a nut, a bolt, a nut with a washer and a bolt with a washer.

  The washer of the present invention is provided with a large number of protrusions (washer protrusions) radially outward from the through hole on the center side, and the washer protrusions are the back surfaces of the heads of nuts or bolts (including hooks and screws; the same applies hereinafter). A washer that can be engaged with a large number of chevron-shaped head protrusions that are formed radially in the circumferential direction, so that the engagement does not loosen after tightening a nut or bolt (including "hard to loosen": the same applies hereinafter). The washer protrusion comprises a climbing slope, a locking surface, a ridgeline portion of the rising intersection on both sides, and a trough portion of the descending intersection, and the climbing slope is closer to the rotation direction of the nut or bolt than the ridgeline portion. In this case, the locking surface is a washer that is in the direction of tightening rotation of the nut or bolt relative to the ridge line portion, the ridge line portion and the valley portion are arc-shaped, and has a continuous waveform in side view.

  The washer protrusion may be provided on the entire circumference of the washer surface in the circumferential direction. The washer protrusions can be provided at some intervals in the circumferential direction of the washer surface, and the interval portions can be formed as non-projection parts without the washer protrusions.

  The washer is provided with biting protrusions at several circumferential positions on the back surface of the washer, and the biting protrusions may be able to bite into the fastening material (object). The biting protrusions can be provided on the back surface of the washer at several positions opposite to the non-protruding portions.

  The biting protrusion may be tapered from the base toward the tip, and the tip may be arcuate or planar.

  A hollow portion is provided at a base peripheral edge portion of the biting protrusion, and the hollow portion can have a size that allows meat that rises from the object to enter when the biting protrusion bites into the object.

  The nut of the present invention is provided with a large number of head protrusions radially in the circumferential direction of the back surface of the nut head, and the head protrusion can be engaged with a number of washer protrusions of the washer. The nut is designed to prevent loosening, and the head protrusion of the nut is provided with a climbing slope, a locking surface, a ridgeline part of the rising intersection on both sides, and a valley part of the descending intersection part. The nut is in front of the nut tightening rotation direction, the locking surface is ahead of the nut tightening rotation direction than the ridge line portion, the ridge line portion and the valley portion are arc-shaped, and the nut has a continuous waveform in side view. is there. The head protrusion may be provided on the entire circumference of the back surface of the head. The head protrusions can be provided at intervals in several places in the circumferential direction on the back surface of the head, and the interval portions can be formed as non-projection parts having no head protrusion.

  The bolt of the present invention is provided with a large number of head protrusions radially in the circumferential direction of the back surface of the bolt head, and the head protrusion meshes with a large number of washer protrusions formed radially on the head surface of the washer. In the bolts that are not loosened after the bolts are tightened, the head projections of the bolts are over the slopes, the locking surfaces, the ridges of the rising intersections on both sides, and the valleys of the descending intersections. The ridgeline part is ahead of the ridgeline part in the tightening rotation direction of the bolt, the locking surface is ahead of the ridgeline part in the direction of tightening rotation of the bolt, and the ridgeline part and the valley part are arcuate, The bolt is a continuous waveform. The head protrusion may be provided on the entire circumference of the back surface of the head. The head protrusions can be provided at intervals in several places in the circumferential direction on the back surface of the head, and the interval portions can be formed as non-projection parts having no head protrusion.

  The climbing slope may be a gentle upward slope in the tightening rotation direction, and the locking surface may be a steeper slope than the climbing slope in the loosening direction. The ridge line portion and the valley portion may be arcs having the same diameter or different diameters.

  The nut with a washer according to the present invention is a nut with a washer in which the washer is rotatably set on the back surface of the nut head. The washer is a washer having the above structure, the nut is a nut having the above structure, and the washer protrusion and the nut head. The protrusions are engaged with each other by the relative rotation of the washer and the nut so that the engagement is not loosened after the nut is completely tightened.

  The bolt with the washer according to the present invention is a bolt with a washer in which the washer is rotatably set on the back surface of the bolt head, the washer is the washer having the above structure, the bolt is the bolt having the above structure, and the washer protrusion and the head of the bolt. The protrusions can be engaged with each other by the relative rotation of the washer and the bolt, and the engagement is not loosened after the bolt is completely tightened.

  The washer, nut, bolt, nut with washer, and bolt with washer of the present invention, the washer protrusion, the head protrusion of the nut and bolt, and the ridgeline and valley are arcuate, so the ridgeline and valley are meshed. Sometimes hard to miss. In addition, the press mold is not easily damaged during both protrusion molding, and the mold has good durability (long-lasting).

1 shows an example of a washer in a screw locking structure of the present invention, in which (a) is a perspective view, (b) is a view of the washer of FIG. (D) is a bottom view of the washer of (a), (e) is a BB sectional view of (d). (A) is a front view of a nut with a washer, (b) is an assembly explanatory diagram of the washer to the nut, (c) is a partial cross-sectional view of the nut with a washer in (a), and (d) is other than the nut with a washer FIG. (A) is a front view which shows an example of a volt | bolt with a washer, (b) is detail drawing of P part of (a), (c) is explanatory drawing which shows other examples of a washer protrusion or a head protrusion. (A)-(c) is assembly explanatory drawing of the bolt with a washer of Fig.3 (a). (A)-(c) is process explanatory drawing in the case of fixing two board | plate materials with the nut with a washer of Fig.2 (a), and the bolt with a washer of Fig.3 (a). (A) is a front view which shows an example of a nut, (b) is a front view which shows an example of a volt | bolt. Explanatory drawing of the use of the nut of FIG. 6A and the bolt of FIG. It is a nut with a washer of this invention, Comprising: It is an example at the time of providing two washers, (a) is a front view before an assembly, (b) is a partial sectional view after an assembly, (c) is after an assembly Front view. It is a bolt with a washer of this invention, Comprising: It is an example at the time of providing two sheets of washers, (a) is a front view before an assembly, (b) is a front view after an assembly, (c) is use explanatory drawing. (A) is a front view which shows the other example of a volt | bolt with a washer, (b) is detail drawing of the P section of (a).

(Washer embodiment)
An example of the screw of the present invention will be described with reference to the drawings. The embodiment of FIG. 1A is a case where the screw is a washer 1. A washer 1 shown in FIG. 1 (a) has an annular shape with a through hole 2 formed at the center. The through hole 2 has a hole diameter through which the connecting shaft 27 (FIG. 2B), the bolt shaft 38 (FIG. 3A), and the like can be inserted.

[Washer protrusion]
A large number of angle-shaped washer protrusions 6 are formed at four locations in the circumferential direction of the washer 1 in FIG. 1A, and four groups are formed with several as one group. Between the four groups of washer protrusions 6, non-protrusion portions 7 having no washer protrusions are formed. The biting protrusions 8 are provided so as to protrude from four positions on the back surface of the non-protruding part 7. The four groups are in a row, and the number of groups can be as desired. The width of the non-projection part 7 is narrower than the width of each group.

  The four washer projections 6 in FIG. 1A are formed in the circumferential direction of the surface plateau 5. Each washer protrusion 6 has a mountain shape, and includes a climbing slope 9 (FIG. 1B), a locking surface 10, a ridge line portion 11, and a trough portion 12. The climbing slope 9 is formed on the front side in the tightening rotation direction with respect to the ridge line portion 11, the locking surface 10 is formed on the front side in the tightening rotation direction with respect to the ridge line portion 11, and the ridge line portion 11 is ascending with the climbing slope 9 and the locking surface 10. It is formed at the intersection (the top of the mountain), and the valley 12 is formed at the descending intersection (the bottom of the mountain) between the climbing slope 9 and the locking surface 10. The top part of the ridge line part 11 and the bottom part of the trough part 12 are made into circular arc shape (FIG. 1 (a)), and are made into the waveform which continues by side view. By making it into an arc shape, it is difficult to be chipped and to be crushed (hard to be broken) by meshing with the projections (head projections) of screws such as bolts and nuts. Further, the ridge line portion 11 and the trough portion 12 of the press mold for molding the washer 1 are difficult to be lost during molding, so that they are held (long-lasting).

  The multiple washer protrusions 6 have the same shape. The projection dimensions of the washer projection 6, the inclination angle of the overpass slope 9, the inclination angle of the locking surface 10, the arc radii of the ridge line portion 11 and the trough portion 12, etc. are appropriately designed according to the diameter, thickness, application, etc. of the washer 1. be able to. The inclination angle of the climbing slope 9 and the locking surface 10 may be the same, and the tilting angle of the climbing slope 9 in the tightening direction can be made smaller than the tilt angle of the locking face 11 in the locking direction. .

  As shown in FIG. 1 (c), the washer 1 is one step higher than the surface inner peripheral edge 3 and the surface outer peripheral part 4 between the surface inner peripheral edge 3 outside the through hole 2 and the surface outer peripheral part 4 of the washer 1. It is also possible to form the surface hill portion 5 in a ring shape and to provide a mountain-shaped washer protrusion 6 on the hill portion 5.

[Bite protrusion]
The biting protrusion 8 can have various shapes. An example is shown in FIG. The biting protrusions 8 are provided at four positions in the circumferential direction of the back surface of the washer 1 (FIG. 1 (d)). The biting protrusion 8 bites into a member to be tightened or a member to be connected (hereinafter referred to as “object”) 40, 41 (FIGS. 5A to 5C) when the washer 1 is tightened and rotated. The shape can be a shape that easily bites into the objects 40 and 41 during tightening rotation, for example, a semiconical shape, a crescent cone shape, a quadrangular pyramid shape, or a cone shape (FIG. 1E). Regardless of the shape, the root 8b (FIG. 1 (e)) side is thick, and the tip 8a side is tapered.

  The tip 8a of the biting protrusion 8 is formed in an arcuate shape (FIG. 1 (e)) or a flat shape so that the tip 8a is not easily lost when biting and the tip molding part of the press die is not easily lost. Can also

[Indentation]
A recess 13 is formed on the back surface of the washer 1 and at the root 8b of the biting protrusion 8 (FIG. 1E). The depression 13 is formed by pressurizing the back surface of the washer 1 with a press die and projecting the biting protrusion 8 (projected as the biting protrusion 8 by the amount depressed by the pressurization). When there is the recess 13, the biting protrusion 8 can sufficiently bite into the objects 40 and 41 (FIGS. 5A to 5C) to the base 8 b when tightening, and the objects 40 and 41 that rise due to the biting. Meat (swelling meat) enters the hollow portion 13 (bites in), and the washer 1 becomes difficult to reverse (it becomes difficult to loosen). The recess 13 in FIG. 1 (d) is formed in a circle around the entire circumference of the root 8b of the biting protrusion 8, but if it can be formed by pushing out the biting protrusion 8, the shape, width, and depth (larger) than those described above are large. May be).

(Embodiment 1 of nut with washer)
Another example of the screw of the present invention is shown in FIGS. The screw shown in this figure is a case of a nut 26 with a washer in which the washer 1 is rotatably mounted on the back side of the nut 20. This washer 1 is the washer of FIG.

  A head projection 21 is formed on the back surface of the nut 20. The head protrusion 21 is a mountain shape having a climbing slope 22, a locking surface 23, a ridge line portion 24, and a valley portion 25, and the inclination angle of the climbing slope 22, the locking surface 23, the ridge line portion 24, and the valley portion 25. The height, shape, and the like are the same as those of the washer protrusion 6 of the washer 1 so that they can mesh with the washer protrusion 6. When the nut 20 is turned in the tightening direction, the head projection 21 rotates over the slope 9 over the washer projection 6, but in the reverse direction (slack direction: the same applies hereinafter), the locking surface 23 of the head projection 21 is Locking to the locking surface 10 of the washer projection 6 prevents rotation. The ridge line portion 24 and the trough portion 25 of the head projection 21 are also formed in an arc shape so that even if the head projection 21 gets over the washer projection 6, it is difficult to break, and the press mold is also difficult to break during molding.

  2A, when the nut 20 is rotated in the tightening direction (the arrow direction in FIG. 2A), the head protrusion 21 of the nut 20 meshes with the washer protrusion 6 of the washer 1. 1 is pressed against the objects 40 and 41 (FIGS. 5A to 5C), and the biting protrusions 8 on the back surface of the washer 1 can be bitten into the objects. In this case, the flesh of the objects 40 and 41 that rise due to the biting protrusion 8 enters the recess 13 (FIGS. 1D and 1E) of the root 8b of the biting protrusion 8 and prevents loose rotation (return rotation). Is done.

The nut 26 with a washer shown in FIG. 2A can be manufactured, for example, by the steps shown in FIGS.
(1) The nut 20 is inserted into the through hole 2 of the washer 1 of the connecting shaft 27 protruding from the back surface of the nut 20 (FIG. 2B).
(2) In the state of (1) above, the washer 1 is attached to the nut 20 by crimping the tip end portion 28 (FIG. 2 (c)) of the connecting shaft 27 protruding below the through hole 2 to the outside (so as not to come off). To do). In this case, the washer 1 is rotatable with a gap between the nut 20 and the washer 1.

  The shape of the nut 20 may be such that the skirt 20a is vertical as shown in FIG. The shape may be the same as other general-purpose nuts. The caulking concave portion 14 of the washer 1 may be a slope with a hem spreading as shown in FIG.

(Embodiment 1 of bolt with washer)
Another example of the screw of the present invention is shown in FIGS. 3A and 3B is a bolt 37 with a washer in which a washer 1 is incorporated on the back side of the head 31 of the bolt 30. The washer 1 is the washer of FIG. 1A, and the ridge line portion 35 and the valley portion 36 are arcuate. FIG. 3C shows a case where the diameters of the ridge line portions 35 and the valley portions 36 are alternately provided.

  A head protrusion 32 is formed on the back surface of the head 31 of the bolt 30. The head protrusion 32 has a mountain shape including a climbing slope 33, a locking surface 34, a ridge line portion 35, and a valley portion 36, and the size, inclination angle, ridge line portion 35, valley portion 36 of the climbing slope 33, the locking surface 34. Can be engaged with the washer projection 6 with the same arc radius or the like as the washer projection 6 of the washer 1, and the head projection 32 can be obtained by turning the washer-attached bolt 37 in the tightening direction (arrow direction in FIG. 3A). Rotates over the washer projection 6 of the washer 1 and, in the opposite direction, the locking surface 34 of the head projection 32 is locked to the locking surface 10 of the washer projection 6 to prevent rotation. . The top part of the ridge line part 35 and the bottom part of the valley part 36 are also formed in an arc shape so that even if the head protrusion 32 gets over the washer protrusion 6, it is difficult to be lost, and the ridge line part forming part of the press die is difficult to be lost during molding. It is.

The washer-attached bolt 37 shown in FIG. 3A can be manufactured, for example, by the steps shown in FIGS.
(1) A bolt shaft (screwless shaft) 38 (FIG. 4A) protruding from the back surface of the head 31 of the bolt 30 is inserted into the through hole 2 of the washer 1 (FIG. 4B).
(2) In the state of (1), the screw 39 (FIG. 4C) is cut on the outer surface of the bolt shaft 38 projecting downward from the washer 1, and the washer 1 is attached (so as not to come off). In this case, there is a gap between the washer 1 and the bolt 30, and the washer 1 is rotatable.

[Example of use]
The nut 26 with a washer in FIG. 2A and the bolt 37 with a washer in FIG. 3A can be used, for example, as shown in FIGS.
(1) As shown in FIG. 5 (a), the bolt shaft 38 of the bolt 37 with the washer is inserted as shown in FIG. 5 (b) from above the two stacked plate members (objects) 40 and 41.
(2) The washer-attached nut 26 is screwed onto the bolt shaft 38 projecting downward from the lower plate 40, and the back surface of the washer 1 is brought into contact with the lower plate 40 as shown in FIG. Until it is tightened, the biting protrusion 8 of the washer 1 bites into the lower plate 40, and the meat raised by the biting enters the recess 13 (FIGS. 1D and 1E) of the root 8b of the biting protrusion 8. The loosening of the washer 1 is prevented, and the meshing between the washer projection 6 and the head projection 21 of the nut 26 with washer is prevented from loosening. Further, the biting protrusion 8 of the washer 1 of the bolt 37 with the washer bites into the upper plate 41, and the meat raised by the biting enters into the recess 13 (FIG. 1 (e)) of the root 8b of the biting protrusion 8. The loosening of the washer 1 is prevented, and the meshing of the washer projection 6 and the head projection 32 of the bolt 37 with washer is not loosened.

  The use example is a case where the nut 26 with a washer is tightened, but it can also be tightened in the same manner as described above by tightening a bolt 37 with a washer.

(Nut embodiment)
Another example of the screw of the present invention is shown in FIG. This screw is the case of the nut 20, and this nut 20 is one in which the washer 1 is not attached to the nut 20 of FIG. Accordingly, the head projection 21 is a mountain shape having a climbing slope 22, a locking surface 23, a ridge line portion 24, and a trough 25, and the size of the climbing slope 22, the locking surface 23, the inclination angle, the ridge line portion 24 and the trough portion. The arc radius of 25 is the same as the washer protrusion 6 of the washer 1 (FIG. 1A), and is engaged with the washer protrusion 6. The top part of the ridge line part 24 and the bottom part of the valley part 25 are also formed in an arc shape so that even if the head protrusion 21 climbs over the washer protrusion 6, it is difficult to be lost, and the ridge line part forming part of the press die is difficult to be lost during molding. It is.

(Bolt embodiment)
Another example of the screw of the present invention is shown in FIG. The screw of this figure is a case of a bolt 30, and this bolt 30 is one in which the washer 1 is not attached to the bolt 30 of FIG. Therefore, the head protrusion 32 has a mountain shape including a climbing slope 33, a locking surface 34, a ridge line portion 35, and a valley portion 36, and the size, inclination angle, ridge line portion 35 and valley portion of the climbing slope 33, the locking surface 34, and the like. The arc radius of 36 is the same as that of the washer protrusion 6 of the washer 1 (FIG. 1A), and is engaged with the washer protrusion 6. The top part of the ridge line part 35 and the bottom part of the valley part 36 are also formed in an arc shape so that even if the head protrusion 32 climbs over the washer protrusion 6, it is difficult to be lost, and the ridge line part forming part of the press die is difficult to be lost during molding. It is.

[Examples of using nuts and bolts]
The nut 20 in FIG. 6A and the bolt 30 in FIG. 6B can be used as shown in FIG.
(1) After setting the washer 1 of FIG. 1A on the bolt shaft 38 of the bolt 30, the lower plate 40 is inserted from above the two plate members (objects) 40, 41 on which the bolt 30 is overlaid. A bolt shaft 38 protruding downward is covered with the washer 1 of FIG. 1A, and the nut 20 of FIG. 6A is screwed onto the bolt shaft 38 from below.
(2) When the nut 20 is tightened and rotated in the above state, the head protrusion 21 of the nut 20 moves over the washer protrusion 6 of the washer 1 and presses the washer 1 against the lower plate 40, so that the back surface of the washer 1 is The biting protrusion 8 bites into the lower plate 40. In this case, the meat of the lower plate 40 that rises due to the biting protrusion 8 of the washer 1 enters the hollow portion 13 (FIG. 1E), and the loose rotation (return rotation) is prevented. At this time, the head protrusion 21 of the nut 20 rotates over the washer protrusion 6 of the washer 1. After completion of the tightening rotation of the nut 20, the locking surface 23 of the head projection 21 is locked to the locking surface 10 of the washer projection 6 and the reverse rotation (return rotation) of the nut 20 is prevented.

  The bolt 30 may be tightened instead of the nut 20. In this case, the nut can be tightened in the same manner as when the nut is tightened, and reverse rotation (return rotation) is prevented.

(Embodiment 2 of nut with washer)
Embodiment 1 of the nut with a washer is a case where one washer is attached to one nut, but the nut with a washer of the present invention can also attach two or more washers to one nut 20. In the embodiment shown in FIGS. 8A to 8C, two washers 1 are attached.

  The nut 20 of the nut 26 with a washer shown in FIG. 8 (a) has the same structure as the nut 20 of FIG. 2 (b), except that the connecting shaft 27 is longer than the connecting shaft 27 of FIG. 2 (b). It is. 8 (a) to 8 (c), the upper washer 1b and the lower washer 1a are overlapped on the connecting shaft 27 and set on the connecting shaft 27, and the distal end portion 28 of the connecting shaft 27 is expanded in diameter or folded to fold the lower washer 1a. The upper washer 1b and the lower washer 1a are attached to the connecting shaft 27 so as to be slidable in the axial direction so as not to come off.

  Of the two washers 1a and 1b in FIGS. 8B and 8C, the lower washer 1b has a caulking recess 14 and is the same as the washer 1 shown in FIG. 1C, but the upper washer 1b. Is a structure different from that of the washer 1. Specifically, there is nothing corresponding to the caulking concave portion 14 of the lower washer 1a and the biting protrusion 8 of the lower washer 1a, and the angled upper washer surface protrusion 16 on the surface of the washer 1 and the angled upper washer rear surface protrusion 17 on the back surface. It is provided. The upper washer surface projection 16 meshes with the head projection 21 of the nut 20, and the upper washer back projection 17 meshes with the washer projection 6 of the lower washer 1a. For this reason, the upper washer surface protrusion 16 and the upper washer back protrusion 17 are provided with a climbing slope 9, a locking surface 10, a ridge line portion 11, and a trough portion 12, similarly to the washer protrusion 6 and the head protrusion 21. The top of 11 and the bottom of valley 12 are arcuate to form a continuous wave, and the inclination angle of climbing slope 9 and locking surface 10 is the same as the inclination angle of washer protrusion 6 and head protrusion 21.

[Usage example of nut with washer]
In order to use the nut 26 with a washer in FIG. 8C and the bolt 37 with a washer in FIG. 9C, it can be as shown in FIGS. 9A to 9C. The washer-attached bolt 37 of FIG. 9C is inserted into the holes of the two plate members (connected objects) 40 and 41 to be connected, and the bolt shaft 38 of the washer-attached bolt 37 protruding from the lower plate 40 is attached to the bolt shaft 38 of FIG. The nut 26 with a washer is screwed from below the lower plate 40 and tightened. In this case, the head protrusion 21 of the nut 20 and the upper washer surface protrusion 16 of the upper washer 1b are engaged with each other, the upper washer rear protrusion 17 and the washer protrusion 6 of the lower washer 1a are engaged, and the biting protrusion 8 of the lower washer 1a is the lower plate. Since it bites into 40, it becomes a double lock | rock and the nut 20 becomes much more difficult to loosen.

(Embodiment 2 of bolt with washer)
The bolt 37 with a washer shown in FIG. 9B is formed by covering two bolts (screwless shafts) 38 of the bolt 30 with the upper washer 1b and the lower washer 1a. A screw 39 is formed (cut) on the surface to form a threaded bolt shaft 38 so that the washers 1a and 1b do not fall out of the threaded bolt shaft 38. The two washers 1a and 1b are attached to the base of a bolt shaft 38 without a thread. These washers 1 a and 1 b can rotate around the bolt shaft 38 and can slide in the axial direction of the bolt shaft 38. In this case, the lower washer 1a and the upper washer 1b are the same as the lower washer and the upper washer in FIGS.

(Embodiment 3 of nut with washer)
The nut 37 with a washer in FIG. 8C can be used by being screwed to another bolt. The biting protrusion 8 may be any material as long as it can bite into the plate members 40 and 41 or can be pressed against the plate materials 40 and 41. In the case where the plate members 40 and 41 are easily damaged, it is desirable that they are made of rubber or resin protrusions so that they are not easily damaged and slippery even when pressed. When the material of the plate members 40 and 41 is hard, spike-like protrusions of hard material can be used. Further, it may be an elastic spring or the like. These protrusions can be embedded in the back face of the washer or can be bonded and fixed. The number of washer protrusions, the installation location, and the like can be appropriately designed according to the application.

  In the present invention, the radii of the arcs of the ridge line part and the valley part may all be the same in the continuous direction, or may be all or partly different.

  The chevron shown in FIGS. 10A and 10B is the same as in the above-described various embodiments in that the ridge line part 35 and the valley part 36 are arcuate, but the dimension from the ridge line part 35 to the valley part 36 is the same. Is made longer (the valley is deepened), the climbing slope 33 is tightened to be looser in the rotation direction, and the locking surface 34 is climbed in the reverse rotation (loosening rotation) direction to be steeper than the slope 33. In any of the above embodiments, the climbing slope and the locking surface can be the same as those shown in FIGS.

  In the above-described embodiment, the screws are related to a washer, nut, bolt, nut with washer, and bolt with washer. These locking structures are used as locking structures for other screws and hooks of golf shoes. You can also

DESCRIPTION OF SYMBOLS 1 Washer 1a Lower washer 1b Upper washer 2 Through-hole 3 Surface inner periphery (outside of through-hole) 4 Surface outer peripheral part 5 Surface plateau part 6 Washer protrusion 6a Base part of washer protrusion 7 Non-projection part 8 Biting protrusion 8a (biting protrusion) tip 8b (biting protrusion) root 9 (washer) climbing slope 10 (washer) locking face 11 (washer) ridge 12 (washer) valley 13 depression 14 Caulking recess 16 (of the washer) Upper washer surface protrusion 17 Upper washer back protrusion 20 Nut 20a (Nut) hem 21 (Nut) head protrusion 22 (Nut) climbing slope 23 (Nut) locking surface 24 (Nut Ridge line portion 25 (nut) trough portion 26 washer nut 27 (nut) connecting shaft 28 (connecting shaft) tip 30 bolt 31 (bolt) head 32 (bolt) head protrusion 33 (both) Doo) overcame slope 34 (V) of the locking surface 35 (V) of the ridge portion 36 (bolt) valleys 37 with washer bolt 38 bolt 39 screws 40 the lower plate (plate material: target)
41 Upper plate (plate material: object)

Claims (18)

It is a washer with a through hole in the center, and has a number of washer projections radially in the circumferential direction of the surface, and the washer projections are formed radially in the circumferential direction of the back surface of the nut head or bolt head. A washer that can be engaged with a large number of head protrusions, and that the engagement is difficult to loosen or not loosen after the nut or bolt is tightened,
The washer protrusion is a mountain shape having a climbing slope, a locking surface, and a ridge line portion on both sides of the rising intersection, and a trough portion on the descending intersection portion. It is in front, the locking surface is ahead of the ridge line part in the tightening rotation direction of the nut or bolt, the ridge line part and the valley part are arcuate,
Those overcoming slopes, locking surfaces, ridges, valleys are continuous waves,
A washer characterized by that. The washer according to claim 1,
The climbing slope was tightened to make it slanted in the direction of rotation, and the locking surface was turned in the reverse rotation (slack rotation) direction to make it steeper than the slope.
A washer characterized by that. In the washer according to claim 1 or claim 2,
Washer protrusions are provided on the entire circumference of the washer surface in the circumferential direction.
A washer characterized by that. In the washer according to any one of claims 1 to 3,
With several bite protrusions on the back of the washer,
A washer characterized by that. In the washer according to claim 1 or claim 2,
The washer protrusions are formed at intervals in several places in the circumferential direction of the washer surface, and the interval part is defined as a non-projection part without a washer protrusion.
A washer characterized by that. The washer according to claim 5,
It is several places in the circumferential direction on the back surface of the washer, and the biting protrusion protrudes on the side opposite to the no-projection part on the washer surface, and the biting protrusion can bite into the object.
A washer characterized by that. In the washer according to claim 4 or 6,
The biting protrusion is tapered from the root toward the tip, and the tip is arcuate or planar,
A washer characterized by that. In the washer according to claim 4 or claim 6 or claim 7,
Provided with a hollow at the root peripheral edge of the bite protrusion, the hollow part can contain meat that rises from the object as the bite protrusion bites into the object.
A washer characterized by that. A large number of head protrusions are provided radially in the circumferential direction of the back surface of the head, and the head protrusions can mesh with a number of washer protrusions formed radially in the circumferential direction of the surface of the washer. After that, in the nut that prevents the engagement from loosening or not loosening,
The head protrusion of the nut is a mountain shape with a climbing slope, a locking surface, and a ridgeline part at the rising intersection of both sides, and a trough at the descending intersection. It is in front, and the locking surface is ahead of the ridgeline part in the tightening rotation direction of the nut,
The ridge line and the valley are arcuate,
Those overcoming slopes, locking surfaces, ridges, valleys are continuous waves,
A nut characterized by that. The nut according to claim 9,
The climbing slope was tightened to make it slanted in the direction of rotation, and the locking surface was turned in the reverse rotation (slack rotation) direction to make it steeper than the slope.
A nut characterized by that. The nut according to claim 9 or claim 10,
The head projection was provided on the entire circumference of the back of the head,
A nut characterized by that. The nut according to claim 9 or claim 10,
The head protrusion is formed at intervals in several circumferential directions on the back of the head, and the interval portion is defined as a non-projected part without a head protrusion.
A nut characterized by that. A large number of head protrusions are provided radially in the circumferential direction of the back surface of the head, and the head protrusions can be engaged with a plurality of washer protrusions formed radially in the circumferential direction of the washer. Is a bolt that prevents the engagement from loosening or does not loosen,
The head protrusion of the bolt is a mountain shape with a climbing slope, a locking surface, and a ridge line part at the rising intersection of both sides, and a trough part at the descending intersection part. It is in front, and the locking surface is ahead of the ridgeline part in the direction of bolt tightening rotation.
The ridge line and the valley are arcuate,
Those overcoming slopes, locking surfaces, ridges, valleys are continuous waves,
Bolt characterized by that. The bolt according to claim 13,
The climbing slope was tightened to make it slanted in the direction of rotation, and the locking surface was turned in the reverse rotation (slack rotation) direction to make it steeper than the slope.
Bolt characterized by that. The bolt according to claim 13 or claim 14,
The head projection was provided on the entire circumference of the back of the head,
Bolt characterized by that. The bolt according to claim 13 or claim 14,
The head protrusion is formed at intervals in several circumferential directions on the back of the head, and the interval portion is defined as a non-projected part without a head protrusion.
Bolt characterized by that. The washer according to any one of claims 1 to 8 is rotatably set on the back surface of the nut head according to any one of claims 9 to 12.
A washer with a nut. The washer according to any one of claims 1 to 8 is rotatably set on the back surface of the bolt head according to any one of claims 13 to 16.
This is a washer with a bolt.

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