TW201530001A - Reverse rotation prevention structure for screw body - Google Patents

Abstract

A reverse rotation prevention structure for a screw body is provided with a screw body having a male screw-shaped screw thread, a first washer, and a second washer. The screw body has a screw body-side seat part facing the first washer. The first washer has a first receiving part facing the screw body-side seat part, and a second receiving part facing the second washer. The second washer has a third receiving part facing the second receiving part, and a fourth receiving part facing a body to be fastened having a body to be fastened-side seat part. Consequently, the rotation in a specific direction of the screw body can be reliably prevented by a simple structure.

Description

Anti-reverse structure of threaded body

SUMMARY OF THE INVENTION The present invention is directed to an anti-reverse structure that prevents inversion of a locked thread body.

Conventionally, in various cases, a threaded body has been used in order to lock a locked solid. The threaded body has a structure in which an externally threaded body having a spiral groove formed on the outer circumference of the columnar shape and a threaded groove formed on the inner circumference of the tubular member.

In use, the external thread body is inserted into the hole formed in the locked member to screw the internal thread body; the locked solid is sandwiched by the head portion of the external thread body and the rod portion of the internal thread body; The threaded body can be more conveniently used, and a bolt formed by forming a so-called hexagonal column head at one end of the externally threaded body and a nut having a hexagonal columnar shape on the outer side are combined. Further, the small head having a non-hexagonal shape on the head and forming a so-called slot and a cross recess on the end surface is also widely used.

In addition, when the threaded body is locked, a gasket, also called a gasket, can be inserted around the externally threaded body, and the gasket can prevent the locked solid from being bent and scratched when locked, and the solid can be locked by the positive abutment. Suppress the looseness of the threaded body. For example, in addition to a generally "smooth gasket", the gasket has a projection extending in the radial direction on the inner or outer ring, which is engaged with the locked solid or threaded body to prevent slack. "Attachment washer", a "claw washer" in which the axially bent short claw is engaged with the locked solid, a "spring washer" which is elastically deformed to prevent the loosening of the thread body, and a tooth having a snap-fit surface around it "Toothed washer" for teeth (please refer to Japanese Industrial Standard JIS 1251 Spring Washer).

However, conventional gaskets are not ideal for preventing the loose structure between the threaded bodies, and the degree and effect of friction and engagement are well known. Therefore, in a severely vibrating environment, even if a gasket is used, there is a problem of slack.

Therefore, in order to solve the above problems, it is an object of the present invention to provide a structure for preventing reverse rotation, which is capable of preventing slack of a threaded body by effectively utilizing a simple structure of a gasket.

In order to achieve the above object, the present invention provides an anti-reverse structure for a threaded body, comprising: a threaded body, a first washer, and a second washer; wherein the thread has one and the first The washer is opposite to the threaded body side base, and the first washer has a first receiving portion opposite to the threaded body side base and a second receiving portion opposite to the second washer, and the second washer has a second washer a third receiving portion opposite to the second receiving portion and a fourth receiving portion opposite to the locked solid having the locked solid side base; and a structure between the threaded body side base and the first receiving portion Even if the turning force of the specific direction is applied to the screw body side base, the first engaging mechanism can maintain the mutual engagement state, and between the second receiving portion and the third receiving portion, even if a second engaging portion or a third engaging portion that can maintain a mutual engagement state of the rotating force in a specific direction; the second washer, the inner ring surface, the fourth receiving portion or the fourth One of the surrounding parts, with The axial distance to the threaded body is a non-fixed washer-side engaging portion, and the washer-side engaging portion is formed by engaging one of the locked solids or a portion of the opposite-side threaded body even if the second a third engaging mechanism for the washer to apply a specific direction of rotation force to maintain the mutual engagement state; the first engaging mechanism prevents relative rotation between the threaded body and the washer in the specific direction, And preventing, by the second engaging mechanism, the relative rotation of the specific direction between the first washer and the second washer and preventing the second washer from being locked by the third engaging mechanism The relative rotation of the solid or the particular direction created between the opposing side threads prevents relative rotation of the threaded body and the particular direction produced by the locked solid or the opposing threaded body.

The anti-reverse structure of the threaded body, wherein one of the first engaging mechanism or the second engaging mechanism has a sloped surface inclined in a circumferential direction around the axis of the threaded body, and the inclined surface is set The angle of inclination is greater than the angle formed by the thread of the threaded body to prevent relative rotation of the particular direction.

In the anti-reverse structure of the screw body, the first engagement mechanism forms a screw body side unevenness on the screw body side base and forms a concave-convex engagement with the screw body side concave portion on the first receiving portion. The first receiving portion side unevenness or the second receiving portion forms a second receiving portion side unevenness as the second receiving portion, and the third receiving portion forms a concave and convex portion with the second receiving portion side. The third receiving portion side unevenness prevents the engagement of the relative rotation of the specific direction in such a manner.

In the anti-reverse structure of the screw body, the concavities and convexities are provided in a zigzag shape in the circumferential direction, and the zigzag shape is a relative rotation that can be reversed in relative rotation with respect to the specific direction to prevent relative rotation in the specific direction.

The anti-reverse structure of the threaded body, wherein the fourth receiving portion of the second washer has a second washer-side inclined surface with respect to the locked solid; the second washer side obliquely faces the shaft of the threaded body a vertical cross-sectional shape and including a field displaced in a circumferential direction of the thread body to a distance of the axial center; the second gasket side inclined surface is engaged with the locked solid side base of the locked solid, even if The second washer exerts the rotational force in the particular direction to form the third engaging mechanism that maintains its mutual engagement.

The anti-reverse structure of the thread body described above, wherein the second gasket bevel includes a meandering surface.

In the present invention, the threaded body of the simple structure is prevented from being reversed, for example, the rotation of the threaded body in the loosening direction is prevented, and the rotation of the threaded body is prevented from being slack.

The anti-reverse structure 10 to which the thread body 20 of the present invention is applied will be described with reference to the following Figs. 1-4; further, if there are similarities, some differences are omitted and indicated by the same symbols.

The anti-reverse structure 10 of the threaded body 20 of the present invention is an externally threaded body 20 or a threaded body 20 having at least one end of the internally threaded body, a first washer 30 abutting the threaded body 20, and a first washer 30 in the locking system formed by the abutting second washer 40 and the locked solids 50 and 51 abutting the second washer 40, for preventing the between the threaded body 20 and the locked solids 50 and 51 A relative rotation R in a specific direction, such as a locking mechanism such as a slack.

1 is a perspective view showing an embodiment of an anti-reverse structure 10 to which a threaded body 20 of the present invention is applied; wherein (A) is a perspective view of an unfolded state of a constituent element of the present locking system as viewed obliquely from above, and (B) Is a perspective view of the unfolded state of the constituent elements of the present locking system from obliquely downward; as shown in FIG. 1, the anti-reverse structure 10 of the threaded body 20 of the present embodiment includes a threaded body having an externally threaded thread 21. 20 (not shown, but may be an externally threaded body), a first washer 30, and a second washer 40.

The threaded body 20 has a hexagonal cylinder head and a threaded portion connected to the lower portion thereof to form a so-called hexagonal bolt outer thread body 20. The lower end edge of the head is formed with a circular flange-like flange, which is not limited thereto. The thread 21 of the externally threaded body 20 is set at a guide angle α, and constitutes a screw-threaded shape that can be screwed to the side of the locked solid 51. Threaded hole 53 therein. Below the head there is a threaded body side base 22 relative to the first washer 30. The screw body side base 22 has a screw body side base 24 which is swelled and rewinded in the circumferential direction of the shaft of the male screw body 20. Each of the concavities and convexities of the threaded body side base 24 has an inclined inclined surface 23 in the circumferential direction centering on the axis of the externally threaded body 20, and the inclined angle θ of the inclined surface 23 is set larger than the thread forming the externally threaded body 20. The lead angle α of 21. Here, the number of the inclined faces 23 may be plural, but the angle of inclination θ of the inclined faces 23 may be larger than the guide angle α, and the rest is not limited. Further, the phase position of the inclined surface 23 is set to be the same as that in the circumferential direction, and the first receiving portion side uneven portion 34 may be appropriately fitted without being limited.

The first washer 30 has a substantially circular shape, and a first washer threaded through hole 36 having a threaded portion that can pass through the externally threaded body 20 is bored in the central portion, and the first receiving portion 31 with respect to the threaded body side base 24 and Corresponding to the back surface of the first receiving portion 31, that is, the second receiving portion 32 is provided on the second gasket 40 side. The first receiving portion 31 is formed by fitting the screw body side base 24 to have a bulging shape, and has a first receiving portion side uneven portion 34 that can be fitted to the screw body side base 24 . Each of the concavities and convexities of the first receiving portion side uneven portion 34 has an inclined surface 33 that is inclined in the circumferential direction around the axis of the male screw body 20, and the inclined angle θ of the inclined surface 33 is set larger than that of the externally threaded body 20 The lead angle α of the thread 21 . Here, although the number of the inclined faces 33 may be set to be the same as the inclined face 23 formed by the screw body side base 24, the angle inclination angle θ of the inclined faces 33 may be larger than the guide angle α, and the rest is not limited. Further, the phase position of the inclined surface 33 is set to be the same as that in the circumferential direction, and the first receiving portion side uneven portion 24 may be appropriately fitted without being limited. The second receiving portion 32 is formed by fitting the third receiving portion 41 formed by the second gasket 40 to have a bulging shape, and has a second receiving portion that can be fitted to the third receiving portion side uneven portion 43. Side uneven portion 35. The unevenness of the second receiving portion side uneven portion 35 is a zigzag shape provided in the circumferential direction, and the zigzag shape allows a specific direction, that is, the direction of the loose external thread body 20 when the third receiving portion side uneven portion 43 is fitted. The relative rotation of the opposite rotation R is reversed to prevent the relative rotation R in the specific direction. Here, the number of concavities and convexities is the same as the number of concavities and convexities formed by the uneven portion 43 on the third receiving portion side, and the fitting state is not limited to the same number. In addition, the phase position of the unevenness setting is the same as that in the circumferential direction, and the third receiving portion side uneven portion 43 may be appropriately fitted without being limited.

The second washer 40, as shown in FIG. 2, has a substantially circular shape, and a second washer threaded through hole 45 having a threaded portion that can pass through the externally threaded body 20 is pierced at a position offset from the center, and The third receiving portion 41 of the second receiving portion 32 and the back surface corresponding to the third receiving portion 41 have a fourth receiving portion 42 with respect to the locked solid 50 side. In other words, in this embodiment, the second gasket 40 is set to be larger than the area of the first gasket 30. The area of the second gasket 40 is not limited to be larger than the area of the first gasket 30. However, if it is engaged with the locked solid 50, the relative rotation of the specific direction is prevented to constitute the gasket side engaging portion 44 and the area thereof is set. The larger area, and the excess area may constitute a non-fixed reduced diameter portion to the second washer threaded through hole 45. For example, in the present embodiment, the second washer 40 is formed into an outer circle and an inner circle as an eccentric circular shape to constitute a different diameter portion. The different diameter portion is formed by combining the second washer 40 and the locked solid 50 so as to prevent relative rotation R in the specific direction of the second washer 40 and the locked solid 50. The third receiving portion 41 is formed by fitting the second receiving portion 32 to have a bulging shape, and has a third receiving portion side uneven portion 43 that can be fitted to the second receiving portion side uneven portion 35. The unevenness of the third receiving portion side uneven portion 43 is a zigzag shape provided in the circumferential direction, and the zigzag shape allows a specific direction, that is, the direction of the loose external thread body 20 when the second receiving portion side uneven portion 35 is fitted. The relative rotation of the relative rotation R is reversed to prevent the relative rotation R of the specific direction from being formed. Here, the number of concavities and convexities is the same as the number of concavities and convexities formed by the uneven portion 35 on the second receiving portion side, and the fitting state can be obtained without being limited to the same number. Further, the phase position of the unevenness setting is the same as that in the circumferential direction, and the second receiving portion side uneven portion 35 may be appropriately fitted without being limited. In the present embodiment, the fourth receiving portion 42 is formed as a smooth surface, and is configured to be in contact with the locked solid side base 52 on the peripheral surface of the hole through which the threaded member 50 is threaded. However, the fourth receiving portion 42 is not fixed to a smooth surface, and may be formed in a ridge shape, a ladder shape, a pin shape, or the like. In this case, the ridge shape, the step shape, and the pin shape may be used as the gasket side engagement portion 44. Used.

The locked solids 50 and 51 are located on the head side of the axial direction of the male screw body 20, and the locked solid 50 which is provided through the threaded through hole of the male screw body 20, and the front end side of the threaded portion of the male screw body 20 And a locked solid 51 having an internally threaded hole 53 through which the externally threaded body 20 is screwed, and arranged such that the locked solids 50 and 51 are respectively passed through the hole axis of the uniform hole to be stacked. . On the outer surface of the locked solid 50, a locked solid side base 52 which is eccentric to the hole axis is recessed around the threaded through hole. The locked solid side base 52 and the second washer 40 are slightly overlapped and set to a suitable depth, for example, a depth similar to that of the second washer 40.

The anti-reverse structure 10 of the screw body 20 configured as described above is, for example, the following sequence: First, the second washer 40 is fitted to the locked solid side seat 52 recessed by the locked solid 50 while being fitted with the eccentric phase. . Next, the external threaded portion of the male screw body 20 is passed through the first washer threaded through hole 36 of the first washer 30. At this time, the screw body side base 24 of the male screw body 20 abuts against the first receiving portion side uneven portion 34, and in this state, the threaded portion of the male screw body 20 is passed through the threaded through hole of the locked solid 50, and at the same time Screwed into the internally threaded hole 53 of the locked solid 51. In this process, the thread 21 of the male screw body 20 is not visible from the position between the first washer 30 and the second washer 40, but is the serrated second receiving portion side uneven portion 35 of the first washer 30 and The zigzag-shaped third receiving portion side uneven portions 43 of the two washers 40 are in contact with each other, and at the same time, the relative rotation of the locking directions is allowed and the mutual fitting is performed. Further, in the screwing process, the threaded body side base 24 of the male screw body 20 and the first receiving portion side uneven portion 34 of the first washer 30 are perpendicular to the inclined faces 23 and 33, respectively (with external threads) The axially substantially parallel faces of the body can abut against the surface direction to prevent relative rotation by rotating relative to each other. In this way, the locking operation can be ended at the point of obtaining the appropriate torque or the required axial force.

In the locked state, when an external force is applied in a direction in which the locking system is loosened, first, between the screw body side base 22 of the male screw body 20 and the first receiving portion 31 of the first washer 30, even if The threaded body side base 22 receives the first engaging mechanism 60 in a state in which the rotational force in a specific direction can still be engaged with each other. The first engaging mechanism 60 has inclined surfaces 23 and 33 which are inclined in the circumferential direction around the axis of the externally threaded body 20, and the inclination angles θ of the inclined faces 23 and 33 are set larger than those of the externally threaded body 20 The lead angle α of the thread 21 is formed to prevent a relative rotation R in a specific direction, that is, a direction in which the external thread body 20 is loosened.

More specifically, the first washer 30 is configured by the second engagement mechanism 61 and the third engagement mechanism 62 described below, so that the locked solid 50 cannot be rotated relative to the direction in which the externally threaded body 20 is loosened. Therefore, if only the threaded body side base 22 of the male screw body 20 performs the relative rotation R in the specific direction with respect to the first washer 30, the inclination angles θ of the inclined faces 23 and 33 are set larger than the threads forming the male screw body 20. The guide angle α of 21, so that the threaded body side base 22 (inclined surface 23) of the externally threaded body 20 is to be moved by the relative rotation of the first washer 30 by an axial movement distance greater than that of the externally threaded body 20 by the thread 21 The axial movement distance of the relative rotation. That is, when an external force is applied to the externally threaded body 20 in the slack direction, the threaded body side base 22 (inclined surface 23) receives a force of pressing the first washer 30 in the direction of the second washer 40, thereby preventing relative rotation R. When the first washer 30 is pressed against the second washer 40 side, the multiplication effect of the engagement state of the second engagement mechanism 61 and the third engagement mechanism 62 described below can be further enhanced.

In addition, between the second receiving portion 32 of the first washer 30 and the third receiving portion 41 of the second washer 40, even if the second receiving portion 32 or the third receiving portion 41 receives a specific direction, that is, the loose external thread body 20 The rotational force of the direction can still maintain the second engagement mechanism 61 in a state of being engaged with each other. The second receiving portion side unevenness 35 of the second receiving portion 32 and the third receiving portion side uneven portion 43 that engages with the second receiving portion side uneven portion 35 of the third receiving portion 41 to obtain a specific direction, that is, a loose external thread The relative rotation R in the direction of the body 20 is engaged and fitted. Further, the unevenness is provided in a zigzag shape in the circumferential direction, and the zigzag shape is a relative rotation which is allowed to reverse the relative rotation of the specific direction, that is, the direction of the loose external thread body 20, so as to prevent the relative direction of the specific direction from being reversed. Rotate R to form.

The second washer 40 has a washer-side engaging portion 44 that is not fixed to the outer circumference of the external thread body 20 around the fourth receiving portion 42 or the fourth receiving portion 42 (shown in FIGS. 1 to 2). In the embodiment, the circular shape of the second washer 40 to the outer thread body 20 is eccentric and the distance is different, and the washer side engaging portion 44 is engaged with a part of the locked solid 50 (in The engaging portion formed by the substantially eccentric circular counterbore recessed on the side of the locked solid 50 is configured to form a rotational force in the direction of the loose external thread 20 even in a specific direction of the second washer 40. The third engagement mechanism 62 is held in a state of being engaged with each other.

By the above first engaging mechanism 60, the specific direction between the externally threaded body 20 and the first washer 30, that is, the relative rotation R of the direction in which the externally threaded body 20 is loosened, is prevented, and by the second engaging mechanism 61, Preventing a specific direction between the first washer 30 and the second washer 40, that is, loosening the relative rotation R of the direction of the external thread body 20, and preventing the second washer 40 and the locked solid 50 by the third engaging mechanism 62 The specific direction between, that is, the relative rotation R of the direction in which the externally threaded body 20 is loosened, thereby preventing the relative rotation between the externally threaded body 20 and the locked solid 50, that is, the relative rotation R of the direction in which the externally threaded body 20 is loosened.

In particular, in the present embodiment, the inclined directions of the inclined faces 23 and 33 of the first engaging mechanism 60 are opposite to the inclined directions of the zigzag inclined faces of the second engaging mechanism 61. Therefore, the relative rotation of the first engagement mechanism 60 when the male screw body 20 is locked is suppressed, and the relative rotation of the second engagement mechanism 61 is within the allowable range. On the other hand, when attempting to loosen the externally threaded body 20, the axial force from the opposite direction is received on both sides of the inclined faces 23 and 33 of the first engaging mechanism 60, and the second engaging mechanism 61 can be obtained by the axial force. The synergistic effect of the stuck state.

In the present embodiment, the first engaging mechanism 60 formed between the male screw body 20 and the first washer 30 has inclined surfaces 23 and 33 in the circumferential direction centering on the axis of the male screw body 20, and the inclined surface 23 and The inclined surface θ of 33 is set to be larger than the lead angle α, but the present invention is not limited thereto. For example, the second engaging mechanism 61 formed between the first washer 30 and the second washer 40 has inclined faces 23 and 33 in the circumferential direction centering on the axis of the male screw body 20, and the inclined faces 23 and 33 are inclined The surface θ is set to be larger than the lead angle α. At this time, the screw body side uneven portion similar to the second receiving portion side uneven portion 35 is formed on the screw body side base 22 of the first engagement mechanism 60, and the third receiving portion is formed on the first receiving portion 31. The first receiving portion side uneven portion having the same side concave portion 43 is fitted, and the screw portion side uneven portion and the first receiving portion side uneven portion are fitted to prevent a specific direction, that is, the relative rotation R of the direction in which the external thread body 20 is loosened. Just fine. Thereby, the functions of the first engaging mechanism and the second engaging mechanism can be replaced, which are also the same in other embodiments described below.

In the second washer 40 in the embodiment, the washer-side engaging portion 44 is provided from a portion of the outer periphery of the shaft of the threaded body, and the washer-side engaging portion 44 is engaged with the locked solid 50. Some of them prevent relative rotation in a specific direction, but the arrangement of the gasket side engaging portion 44 is not limited thereto, and may be configured as shown in FIG. The second washer 140 shown in FIG. 3(A) is set in a substantially bell-shaped planar shape, and has a non-fixed outer shape from the front surface to the second washer thread through-hole 145, and its non-fixed outer shape setting. In order to achieve the function of the gasket side engaging portion 44. The second washer 240 shown in FIG. 3(B) has a teardrop shape, and has a non-fixed outer shape from the front surface to the second washer thread through hole 245, and its non-fixed outer shape is set to the gasket side. The function of the engaging portion 44. The second washer 340 shown in FIG. 3(C) has a second washer threaded through hole 345 extending through the two surfaces and is configured to be threaded through the two externally threaded bodies 20 and constitutes a non-fixed washer side card from the shaft. The function of the joint portion 44 is such that one of the externally threaded bodies 20 passes through the second washer threaded through hole 345 and passes through the second washer threaded through hole 345 with the other male threaded body 20 to prevent relative rotation R in a specific direction (refer to the figure). 4(C)).

Fig. 4 is a view showing a locking example using the second washer shown in Fig. 3. 4(A) and 4(B) show a locking system in which the flange-shaped locked solids 150 and 151 are locked solids at the flange pipe joint portion. In FIG. 4(A), the washer side engaging portion 44 of the different diameter portion forming the bell-shaped second washer 140 abuts against the tube surface of the flange tube to prevent relative rotation with respect to the locked solids 150, 151. Composition. In FIG. 4(B), the gasket side engaging portion 44 of the different diameter portion forming the teardrop-shaped second washer 240 abuts against the tube surface of the flange tube to prevent relative rotation with respect to the locked solids 150, 151. Composition.

The second washer 40 shown in Fig. 1 is provided on the gasket side engaging portion 44 from the outer periphery of the shaft of the screw body, but the present invention is not limited thereto. For example, the second washer 440 shown in Fig. 5(A) has an outer peripheral concentric portion arc shape S with respect to the axial center of the thread, and the remaining portion has a shape in which the string G is linearly cut away. According to this configuration, the distance from the washer side engaging portion 444 to the axial center of the screw body is not fixed (varies with the circumferential direction).

On the other hand, the locked solid side base 452 formed around the threaded through hole of the locked solid 450 is also substantially recessed in the second washer 440. Therefore, depending on the shape of the string G, the gasket side engaging portion 444 and the locked solid side base 452 are engaged to suppress relative rotation in the circumferential direction.

Further, as shown in FIG. 5(B), the outer peripheral portion of the second washer 440 has a circular arc shape S with respect to the axial center of the screw, and the remaining portion forms a projection T extending in the radial direction. At this time, a recess K which is recessed in the radial direction is formed on the inner wall of the solid side base 452 to be locked. By the engagement of the projection T and the recess K, the two are engaged, and the relative rotation in the circumferential direction is suppressed. On the other hand, the outer peripheral edge of the second gasket 440 may be formed in a recess (notch) in the radial direction, and the protrusion on the inner side in the radial direction may be formed on the side of the solid side base 452 to be locked, which is not shown.

Further, the washer-side engaging portion 44 of the second washer 40 shown in FIG. 1 is exemplified by forming a plane with respect to the surface of the locked solid 50, but the present invention is not limited thereto. For example, the washer-side engaging portion 544 of the second washer 540 shown in Fig. 6(A) may have a conical portion 544C such as a conical shape centering on the axial center of the thread with respect to a part of the surface of the solid to be locked 550. . In this case, the tapered portion 552C is also formed on the locked solid side base 552 of the locked solid 550. Thereby, the tapered portion is abutted to increase the coaxiality of the locked solid 550 and the second gasket 540, and the contact area can be widened. Further, as shown in this example, a gap is formed between the gasket side engaging portion 544 of the outer circumferential edge of the second gasket 540 and the inner wall of the locked solid side base 552, and the outer wall of the gasket side engaging portion 544 is inclined. The surface 544A is inserted into the back side of the second gasket 540 (on the side of the locked solid 550) at the time of disassembly. As a result, a part of the washer-side engaging portion 544 is lifted by the slotted screwdriver D, and the engagement with the circumferential direction of the locked solid-side base 552 can be forcibly released.

Further, as shown in FIG. 6(B), an insertion recess 544B that is away from the locked solid 550 may be formed on the periphery of the second washer 540. The tip end of the slotted screwdriver D is inserted from the back side by the insertion recess 544B.

In FIGS. 4(A) and 4(B), the flange-shaped locked solids 150 and 151 have a convex stepped portion (flange tube) around the flange, and the gasket side engaging portions of the second washers 140 and 240 are brought into contact with each other. The surface of the tube of the stepped portion (flange tube) is exemplified to prevent relative rotation of the locked solids 150, 151 and the second gasket 140. On the other hand, as shown in FIGS. 7(A) and (B), the locked solid 650 itself is used as the locked solid side base 652, and the concave solid side stepped portion 652E is provided around the concave portion. At this time, as the washer-side engaging portion 644 of the second washer 640, the washer-side stepped portion 644E extending in the axial direction of the screw body is formed. Specifically, the washer-side stepped portion 644E is a claw that is bent toward the locked solid 650 side, and the distance between the washer-side stepped portion 644E and the locked solid-side stepped portion 652E to the center of the screw coincides with each other. Therefore, the washer-side stepped portion 644E is engaged with the locked solid-side stepped portion 652E to prevent relative rotation between the two.

The application structure of Fig. 7 is shown in Fig. 8. As shown in Fig. 8(A), in order to increase the strength, the locked solid 750 and the cylindrical portion 752F having the internally threaded hole 753 therein extend to the periphery of the plate-like ridge 752G. At this time, an annular gasket side stepped portion 744G that extends in the axial direction of the screw body is formed on the periphery of the second washer 740. The washer side stepped portion 744G covers the cylindrical lock solid 750. The gasket side stepped portion 744G forms a notch 744H in order to avoid interference of the ribs 752G. The inner circumferential surface of the notch 744H forms a gasket side engagement portion 744 that engages with the rib 752G, so that the relative rotation between the two is suppressed.

Further, as shown in FIG. 9(A), the locked solid 850 is formed of a pipe material, and the locked solid side inclined surface 852J of the locked solid side base 852 is an outer peripheral surface of the pipe. At this time, the washer side engaging portion 844 as the second washer 840 has a washer side inclined surface 844J with respect to the locked solid 850. The washer-side inclined surface 844J is constituted by a meandering surface including a partial circumferential surface of a virtual cylinder having a shaft inclined to the axis of the screw body (the same shaft as the pipe of the solid to be locked 850).

Specifically, as shown in FIG. 9(B), the axially-oblique cross-sectional shape (section line G) of the washer side inclined surface 844J at an appropriate position on the axis of the shaft of the screw body includes the displacement field from the distance of the axial center. Similarly, the axially orthogonal cross-sectional shape (section point G) of the locked solid side inclined surface 852J at an appropriate position on the axis of the axis of the screw body includes the displacement field from the distance of the axial center. As a result, the washer-side inclined surface 844J abuts against the locked solid-side inclined surface 852J, and is engaged with each other in the circumferential direction to prevent relative rotation between the two.

As shown in Fig. 10(A), the locked solid side base 952 of the locked solid 950 is in the shape of an elliptical hemisphere, and the center of the bottom surface thereof is formed with an internally threaded hole. At this time, the washer-side engaging portion 844 of the second washer 940 is regarded as a projection of an elliptical hemisphere having a cross-sectional shape similar to an ellipse in the direction perpendicular to the axis.

As shown in FIGS. 10(B) and (C), the locked solid side base 952 and the washer side engaging portion 844 have an elliptical shape, and include a right-angled cross-sectional shape (section point G) at an appropriate position on the axis and The field of displacement based on the axis. Therefore, the concave portion of the locked solid side base 952 is coupled to the protrusion of the gasket side engaging portion 844, so that the relative rotation of the two can be prevented.

Further, in the above embodiment, the case where the first and second washers are interposed between the top of the externally threaded body and the locked solid is mentioned, but is not limited to the present invention, and may be an internal threaded body and a locked solid. Intervening between the first and second washers described above.

In addition, as shown in FIG. 11 to FIG. 13 , in the case where the first washer 1030 and the second washer 1040 are interposed between the internal thread body 1020 and the locked solid 1050, the second washer 1040 may also be directed to the externally threaded body 1070. The other side shaft portion is engaged in the circumferential direction. For example, as shown in FIG. 13, the gasket side engagement portion 1044 whose distance from the axial center of the screw body is not fixed is formed on the inner circumferential surface of the second gasket 1040. Specifically, the inner circumferential surface of the second gasket 1040 has a circular arc shape with respect to the axial center of the screw, and the remaining portion has a linear shape like a chord. On the other hand, as shown in FIG. 12, the cylindrical portion 1072A of the shaft portion 1072 of the male screw body 1070 also forms a screw body side engaging portion 1074 which is not fixed from the axial center.

Therefore, when the shaft portion 1072 of the male screw body 1070 is inserted into the second washer 1040, the washer-side engaging portion 1044 and the male-threaded body side engaging portion 1074 are abutted, and the relative rotation in both circumferential directions is suppressed.

Further, as an application example, as shown in FIGS. 14 and 15 , the shaft portion 1172 of the male screw body 1170 overlaps with the male screw portion 1172B to form the outer bolt side engaging portion 1174. The outer bolt side engaging portion 1174 is formed along the tip end of the thread to form a part of a circular arc having a substantially circular cross section from the axial direction, and the chord is a shape that is omitted (or cut). That is, the virtual plane P which is a right angle to the radial direction and faces the outer side in the radial direction is formed by arranging one of the threads in the axial direction, and the virtual plane P becomes the outer bolt side engaging portion 1174. Further, it is preferable that the outer bolt side engaging portion 1174 is provided with a groove of a thread, and the function of spiraling with the internally threaded body 1120 can be maintained.

Therefore, when the shaft portion 1172 of the male screw body 1170 is inserted into the second washer 1140, the washer-side engaging portion 1144 and the outer bolt-side engaging portion 1174 are abutted, and the relative rotation in both circumferential directions is suppressed.

The anti-reverse structure 10 of the screw body 20 will be described above, and various modifications can be made without departing from the spirit of the invention.

10‧‧‧Prevention of reverse structure
140‧‧‧second washer
145‧‧‧Second washer thread through hole
150,151‧‧‧Locked solid
20‧‧‧ thread body
21‧‧‧ thread
22‧‧‧Threaded side base
23‧‧‧Sloping surface
24‧‧‧Threaded side base
240‧‧‧second washer
245‧‧‧Second washer thread through hole
30‧‧‧First washer
31‧‧‧First Receiving Department
32‧‧‧second receiving department
33‧‧‧Sloping surface
34‧‧‧The first receiving part side concave and convex part
340‧‧‧second washer
345‧‧‧Second washer thread through hole
35‧‧‧The second receiving part side concave and convex part
36‧‧‧First washer thread through hole
40‧‧‧second washer
41‧‧‧ Third receiving department
42‧‧‧Fourth Bearing Department
43‧‧‧The third receiving part side concave and convex part
44‧‧‧Gas side engagement
440‧‧‧second washer
444‧‧‧Gas side engagement
45‧‧‧Second washer thread through hole
450‧‧‧Locked solid
452‧‧‧Locked solid side base
50, 51‧‧‧Locked solid
52‧‧‧Locked solid side base
53‧‧‧Threaded hole
540‧‧‧second washer
544‧‧‧Gas side engagement
544A‧‧‧ sloped surface
544B‧‧‧Indentation for insertion
544C‧‧‧ Tapered
550‧‧‧Locked solid
552‧‧‧Locked solid side base
552C‧‧‧ Tapered
60‧‧‧First engagement mechanism
61‧‧‧Second engagement mechanism
62‧‧‧ Third engagement mechanism
640‧‧‧second washer
644‧‧‧Gas side engagement
644E‧‧‧Gas side ladder
650‧‧‧Locked solid
652‧‧‧Locked solid side base
652E‧‧‧Locked solid side ladder
740‧‧‧second washer
744‧‧‧Gas side engagement
744G‧‧‧Gas side ladder
744H‧‧‧ gap
750‧‧‧Locked solid
752F‧‧‧Cylinder shape
752G‧‧‧ ribs
753‧‧‧Threaded hole
840‧‧‧second washer
844‧‧‧Gas side engagement
844J‧‧‧Slant side slope
850‧‧‧Locked solid
852‧‧‧Locked solid side base
852J‧‧‧Locked solid side inclined surface
940‧‧‧second washer
950‧‧‧Locked solid
952‧‧‧Locked solid side base
1020‧‧‧ internal thread body
1030‧‧‧First washer
1040‧‧‧second washer
1044‧‧‧Gas side engagement
1050‧‧‧Locked solid
1070‧‧‧ external thread body
1072‧‧‧Axis
1072A‧‧‧Cylinder
1074‧‧‧ External thread body side engagement part
1120‧‧‧ internal thread body
1140‧‧‧second washer
1144‧‧‧Gas side engagement
1170‧‧‧ external thread body
1172‧‧‧Axis
1172B‧‧‧External thread
1174‧‧‧Outer bolt α side engagement
P‧‧‧ virtual plane
R‧‧‧ relative rotation
S‧‧‧ arc shape
T‧‧‧ Protrusion
K‧‧‧ sag
D‧‧‧Slot screwdriver

1(A) and 1(B) are perspective views showing an embodiment of an anti-reverse structure of a threaded body of the present invention. Fig. 2(A) is a perspective view showing the locking state of the anti-reverse structure of the threaded body to which the present invention is applied; Fig. 2(B) is a plan view of Fig. 2(A); Fig. 2(C): Fig. 2 (B) cc sectional view; Fig. 2 (D): dd sectional view of Fig. 2 (B). 3(A) to 3(C) are plan views showing another embodiment in which the second gasket of the present invention is applied, respectively. 4(A) to 4(C) are perspective views showing the state in which the second gasket of Figs. 3(A) to (C) is locked, respectively. 5(A) and 5(B) are a top plan view and a front view showing another embodiment in which the second gasket of the present invention is applied, respectively. Fig. 6(A) and Fig. 6(B): respectively FIG. 7(A) and FIG. 7(B) are top plan views and front views of another embodiment of a second gasket to which the present invention is applied, respectively. Fig. 8(A) and Fig. 8(B) are a top plan view and a front view showing another embodiment of a second gasket to which the present invention is applied, respectively. Fig. 9(A) and Fig. 9(B): respectively A top view and a front view of another embodiment of a second gasket to which the present invention is applied. Fig. 10(A) to Fig. 10(C) are perspective views showing another embodiment of a second gasket to which the present invention is applied, A top view of the locked solid and a bottom view of the second gasket. Fig. 11 is a front cross-sectional view showing another embodiment of the locking state of the threaded body of the present invention. Fig. 12(A) and Fig. 12(B): a front view and a bottom view of the threaded body of another embodiment FIG 13 (A) and FIG. 13 (B): bottom view and a schematic view of the gasket before the second embodiment of another embodiment. Figure 14 is a front cross-sectional view showing another embodiment of the anti-inversion structure to which the present invention is applied. Figure 15 (A) is a front view of the threaded body of another embodiment; Figure 15 (B): a bottom view of the second gasket.

10‧‧‧Prevention of reverse structure

20‧‧‧ thread body

21‧‧‧ thread

22‧‧‧Threaded side base

23‧‧‧Sloping surface

24‧‧‧Threaded side base

30‧‧‧First washer

31‧‧‧First Receiving Department

32‧‧‧second receiving department

33‧‧‧Sloping surface

34‧‧‧The first receiving part side concave and convex part

35‧‧‧The second receiving part side concave and convex part

36‧‧‧First washer thread through hole

40‧‧‧second washer

41‧‧‧ Third receiving department

42‧‧‧Fourth Bearing Department

43‧‧‧The third receiving part side concave and convex part

44‧‧‧Gas side engagement

45‧‧‧Second washer thread through hole

50, 51‧‧‧Locked solid

52‧‧‧Locked solid side base

53‧‧‧Threaded hole

Claims (6)

A thread body anti-reverse structure comprising a threaded threaded body, a first washer and a second washer; wherein the threaded body has a threaded body side base opposite the first washer; The first washer has a first receiving portion opposite to the threaded body side base and a second receiving portion opposite to the second washer; the second washer has a third receiving portion opposite to the second receiving portion And a fourth receiving portion opposite to the locked solid having the solid side base to be locked; forming a specific direction between the threaded body side base and the first receiving portion even if the threaded body side base is applied a first engaging mechanism capable of maintaining the mutual engagement state of the rotating force; forming a specific direction between the second receiving portion and the third receiving portion even if the second receiving portion or the third receiving portion is applied a second engaging mechanism that maintains its mutual engagement state; the second washer has one of the inner ring surface, the fourth receiving portion or the fourth receiving portion The distance of the axis of the body is not fixed a gasket side engaging portion; the gasket side engaging portion is configured to be engaged with a portion of the locked solid or a portion of the opposite threaded body to maintain a rotation force even if a specific direction is applied to the second gasket a third engaging mechanism that is engaged with each other; the first engaging mechanism prevents relative rotation of the specific direction between the threaded body and the washer, and the second engaging mechanism prevents the second engaging mechanism Relative rotation of the specific direction between the first washer and the second washer, and prevention by the third engaging mechanism between the second washer and the locked solid or the opposite threaded body The relative rotation of the particular direction prevents relative rotation of the threaded body and the particular direction produced between the locked solid or the opposing threaded body. The anti-reverse structure of the threaded body according to claim 1, wherein one of the first engaging mechanism or the second engaging mechanism has a slope inclined in a circumferential direction around an axis of the threaded body And setting the inclination angle of the slope to be larger than the guide angle formed by the thread of the thread body to prevent relative rotation of the specific direction. The anti-reverse structure of the threaded body according to claim 1 or 2, wherein the first engaging mechanism forms a thread body side unevenness on the thread body side base and forms a portion on the first receiving portion The second receiving portion forms a second receiving portion side unevenness on the second receiving portion as the second engaging portion, and the second receiving portion forms a second portion and the second receiving portion. The third receiving portion side unevenness that is engaged with the concave portion on the receiving portion side prevents the relative rotation of the specific direction from being engaged. The anti-reverse structure of the threaded body according to claim 3, wherein the concavity and convexity is a zigzag shape disposed in a circumferential direction, and the zigzag shape is a relative rotation that can be allowed to reverse the relative rotation of the specific direction to prevent the rotation Relative rotation in a particular direction. The anti-reverse structure of the threaded body according to any one of claims 1 to 4, wherein the fourth receiving portion of the second gasket has a second gasket side inclined surface with respect to the locked solid; The washer is inclined to face the axis of the threaded body to form a vertical cross-sectional shape, and includes a field displaced in the circumferential direction of the threaded body to the axial center; the second gasket side inclined surface is engaged with the locked solid The locked solid side seat constitutes the third engaging mechanism capable of maintaining the mutual engagement state even if the rotation force in the specific direction is applied to the second gasket. The anti-reverse structure of the threaded body of claim 5, wherein the second gasket bevel comprises a meandering surface.