JP5767380B1 - Fastening body, fastening structure of fastening body, hinge structure, male fastening body - Google Patents

Abstract

The present invention provides a fastening structure for a fastening body that can provide a loosening prevention effect with a simple structure. In a fastening structure 1 of a fastening body, a male screw body 30 forms a male screw side head portion 40, a male screw portion 52, and a male screw side engaging portion 58 positioned closer to the male screw side head portion 40. . The female screw body 60 includes a female screw portion 82 and a female screw side engaging portion 88 formed on the male screw side head portion 58 side. By screwing the male screw body 30 and the female screw body 60, the male screw side engaging portion 58 and the female screw side engaging portion 88 are engaged, and even when a relative rotational force in the loosening direction is applied, the engaged state is maintained. The engagement mechanism 90 is configured. [Selection] Figure 2

Description

  The present invention relates to a structure for fastening an object to be fastened using a fastening body.

  Conventionally, a screw fastening body is used in various scenes to fasten an object to be fastened. The screw fastening body includes a male screw body (male fastening body) in which a spiral groove is formed on a columnar outer periphery, and a female screw body (female fastening body) in which a spiral groove is formed on the inner periphery of the cylindrical member. It is the structure which screwes together.

  In use, the male screw body is inserted into the hole formed in the member to be fastened, and the female screw body is screwed onto the tip of the thread portion of the male screw body protruding from the back side on the insertion side. As a result, the fastened object is sandwiched between the head of the male screw body and the cylindrical member of the female screw body. What is devised so that such a screw body for fastening can be used easily is a so-called bolt formed by forming a hexagonal column head at one end of the male screw member, and an outer peripheral surface formed in a hexagonal column shape. There are some combinations of nuts. In addition, a so-called small screw, in which the head portion is not hexagonal and a slit (minus hole) or a cross hole (plus hole) is formed on the end face, is also widely used.

  In addition, a washer (washer) is inserted into the shaft portion of the male screw body when the screw fastener is fastened. This washer protects the object to be fastened from buckling or scratches at the time of fastening, and conversely suppresses loosening of the screw fastening body by positively pressing the object to be fastened.

  For example, in addition to a general ring-shaped “flat washer”, the washer has protrusions extending in the radial direction on the inner circumference and outer circumference, and is engaged with a member to be fastened or a screw fastening body to prevent loosening. "Washer with tongue", "Washer with claw" where short claws bent in the axial direction engage with the object to be fastened, "Spring washer" which prevents loosening of the screw fastening body by elastic deformation, Teeth for biting into the fastening surface There is a “toothed washer” or the like provided around (see Non-Patent Document 1).

  A fastening structure in which one of the male screw and the female screw is directly formed on the fastened member is also frequently used. For example, in a hinge used for a frame of glasses, a female screw hole is formed in one bracket, a through hole is formed in the other bracket, and a male screw for fastening is connected to one bracket via the through hole of the other bracket. Screwed into the female screw hole. In this case, the rotating shaft of the hinge is carried by the cylindrical portion of the shaft portion of the male screw body.

Japanese Industrial Standard JIS 1251 Spring Washer

  However, since the conventional washer is only about expecting friction and biting in the structure for preventing loosening between the screw fastening body, the effect thereof is insufficient as is well known. In particular, when a washer is inserted into the shaft portion of the male screw body and fastened, the male screw body is liable to loosen because the shaft portion (tubular portion) of the male screw body is in direct contact with the member to be fastened. . For example, in the case of a spectacle frame hinge, there is a problem that the male screw body gradually loosens when the bracket is repeatedly swung or vibrated during use.

  The present invention has been made by the inventor's diligent research in view of the above-described problems, and is capable of exhibiting a loosening prevention effect with a simple structure and is also capable of performing bracket sliding by repeated rotation of the bracket. An object of the present invention is to provide a fastening structure and a hinge structure of a fastening body that can prevent backlash of the hinge part due to wear of the moving surface and the like and can maintain a stable fastening state for a long period of time.

  The present invention for achieving the above object is a fastening structure of a fastening body having a male screw body and a female screw body, wherein the male screw body includes a male screw side head, a male screw part, and the male screw side head rather than the male screw part. An internal thread side engaging portion formed on the side, and the internal thread body has a hole formed in the axial direction, and is formed on the inner periphery of the hole to be engaged with the external thread portion. And a female screw side engaging portion that is formed closer to the male screw side head portion than the female screw portion and engages with the male screw side engaging portion in the circumferential direction, and the male screw portion and the female screw of the male screw body By screwing the female screw part of the body, the male screw side engaging part and the female screw side engaging part are engaged, and even when a relative rotational force in the loosening direction is applied, the engaged state is maintained. A fastening structure of a fastening body, wherein an engagement mechanism is configured. In addition, it is preferable that the said internal thread side engaging part is formed in the edge part of the said hole.

  In relation to the fastening structure of the fastening body, the male screw body has a radial direction in which the male screw side engaging portion has a diameter equal to or larger than the diameter of the mountain of the male screw portion in the shaft portion including the male screw portion. The female screw body is formed on the outer side, and the female screw side engaging portion is formed on the outer side in the radial direction so that the female screw body has a diameter equal to or greater than the diameter of the valley of the female screw portion.

  In relation to the fastening structure of the fastening body, the male screw body has a male screw side taper portion disposed closer to the male screw side head side than the male screw portion, and the female screw body is more than the female screw portion. A male screw side taper portion disposed on the male screw side head portion and facing the male screw side taper portion; and by screwing the male screw portion and the female screw portion, the male screw side taper portion and the female screw side A taper part is made to contact | abut, It is characterized by the above-mentioned. In addition, it is preferable that the said internal thread side taper part is formed in the edge part of the said hole.

  In relation to the fastening structure of the fastening body, the male screw side engagement portion and the male screw side taper portion are formed to overlap, and the female screw side engagement portion and the female screw side taper portion are formed to overlap. Features.

  In relation to the fastening structure of the fastening body, a gap is formed between the protruding end of the hole of the female screw body and the male screw body in a state where the female screw side tapered portion and the male screw side tapered portion are in contact with each other. Features.

  In relation to the fastening structure of the fastening body, the gap is formed between the protruding end of the hole of the female screw body and the head side of the male screw.

  In relation to the fastening structure of the fastening body, the male screw body has a male screw side step portion disposed closer to the male screw side head side than the male screw portion, and the male screw is provided on an end surface of the male screw side step portion. A side engaging portion is formed.

  In relation to the fastening structure of the fastening body, the male screw side stepped portion is a seating surface facing the female screw body side in the male screw side head, and the female screw side engaging portion is disposed at the protruding end of the hole. It is characterized by being.

  In relation to the fastening structure of the fastening body, the female screw body has a female screw side head portion having a flange shape or a head shape extending in diameter on the outer periphery. In addition, it is preferable that the said female screw side head is formed in the axial direction edge part in outer periphery.

  In relation to the fastening structure of the fastening body, at least one of the male screw side head or the female screw side head is elastically deformable in the axial direction.

  In relation to the fastening structure of the fastening body, substantially the entire shaft portion including the male screw portion of the male screw body is accommodated in the hole.

  In relation to the fastening structure of the fastening body, the engagement mechanism is a ratchet structure that allows relative rotation in the fastening direction.

  In relation to the fastening structure of the fastening body, an engaging portion for engaging with a fastening jig is recessed and / or protruded on the end surface of the female screw body.

  The present invention for achieving the above object is a fastening structure of a fastening body that fastens a fastened member by a male screw body and a female screw body, and the male screw body has a male screw side head and a male screw portion. The female screw body has a hole drilled in the axial direction, and has a female screw part that is formed on the inner periphery of the hole and is screwed with the male screw part, and is extended to the outer periphery. And at least one of the male screw side head or the female screw side head is elastically deformable in the axial direction. The fastening structure of the fastening body.

  The present invention for achieving the above object is a fastening structure of a fastening body having a male screw body and a female screw body, wherein the male screw body includes a male screw side head, a male screw part, and the male screw side head rather than the male screw part. A male thread side taper portion formed on the side, and the female screw body has a hole drilled in the axial direction, and is formed on the inner periphery of the hole, and is a female thread portion that is screwed with the male thread portion. An internal thread side taper portion that is formed closer to the external thread side head portion than the internal thread portion and faces the external thread side taper portion, and the external thread portion of the external thread body and the internal thread portion of the internal thread body are screwed. The fastening structure of the fastening body is characterized in that the male screw side taper portion and the female screw side taper portion are brought into contact with each other.

  The present invention that achieves the above object is a fastening body that is one of the male screw body and the female screw body according to any one of the above.

  The present invention that achieves the above object includes a first sleeve portion to which the fastening structure of any of the above-described fastening bodies is applied, and the first through hole is formed as a member to be fastened, and the first sleeve portion. A first bracket having a continuous first base portion, a pair of second sleeve portions in which the second through-hole is formed and arranged at a predetermined distance in the axial direction, and a second continuous with the second sleeve portion A second bracket having a base, wherein the first sleeve portion is disposed between the pair of second sleeves, and using the first through hole and the second through hole, the male screw body and the The female screw body is configured to be configured such that the first base and the second base can be rotated relative to each other by fastening the first bracket and the second bracket.

  The present invention that achieves the above object includes a male screw-side head, a male screw portion, and a male screw-side tapered portion formed on the male screw-side head side from the male screw portion. Is the body.

  In relation to the male fastening body, there is provided a male screw side unevenness formed to overlap the male screw side tapered portion.

  The female screw body (female fastening body) preferably has a main body formed in a substantially cylindrical shape, and the female screw portion is formed in the inner periphery of the substantially cylindrical main body, that is, the inner periphery of the hole. .

  According to the present invention, it is possible to exert a locking effect of the fastening body with a simple structure, and in addition to the locking effect, in the axial direction by the elasticity of the male screw side head or the female screw side head. The mechanism that generates the pretension to act prevents the rattling caused by leaning of the hinge part due to wear of the bracket sliding surface due to repeated pivoting operation of the bracket, stable long-term fastening and rotation It is possible to provide a fastening structure and a hinge structure of a fastening body capable of maintaining the life.

It is the (A) right view, (B) front view, and (C) left view which show the fastening structure of the screw body concerning a first embodiment of the present invention. (A) Bottom view and bottom cross-sectional view, (B) Front view and bottom cross-sectional view of female screw body, (C) Bottom view and rear view of male screw body. (A) And (B) is a figure which shows the state to which a hinge rock | fluctuates regarding the fastening structure of the screw body. (A) is a bottom sectional view of the fastening structure of the screw body according to the second embodiment, (B) is a bottom sectional view of the fastening structure of the screw body according to the third embodiment, and (C) is an internal thread body of the fastening structure. It is a front view, bottom sectional view, and rear view. (A) is a bottom sectional view of the fastening structure of the screw body according to the fourth embodiment, and (B) is a front view, a bottom sectional view, and a rear view of the female screw body of the fastening structure. (A) is a bottom sectional view of a fastening structure of a screw body concerning a fifth embodiment, and (B) is a bottom view showing an exploded state of a male screw body, a washer, and a female screw body of the fastening structure.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 and 2 show a fastening structure (hereinafter referred to as a fastening structure) 1 of a fastening body (screw fastening body) according to a first embodiment of the present invention. This fastening structure 1 is applied to a hinge structure 100 used in a spectacle frame or the like. That is, the member to be fastened in the present embodiment is a pair of brackets 110 and 130 in the hinge structure 100. The fastening structure 1 fastens the first bracket 110 and the second bracket 130 by the male screw body 30 and the female screw body 60.

  As shown in FIG. 2C, the male screw body 30 is configured to have a male screw side head 40 and a shaft portion 50. The male screw side head portion 40 extends in the radial direction from the shaft portion 50, and a plus groove is formed on the end face, and can be rotated by engaging with a plus tool. In addition, you may make it rotate by engaging an outer periphery with a spanner by making the external shape of the external thread side head 40 into a polygon.

  The shaft portion 50 has a male screw portion 52 formed on the distal end side and a columnar portion formed on the base end side (the male screw side head 40 side). 54). In this embodiment, the cylindrical portion 54 is disposed in the vicinity of the base end side (head side) of the shaft portion 30 and has a larger diameter than the male screw portion 52. The outer peripheral surface of the cylindrical portion 54 (which can also be regarded as the end surface of the cylindrical portion 54) is a male screw side tapered portion 56 that expands toward the male screw side head 40.

  Furthermore, the male screw side taper portion 56 is formed with a male screw side unevenness 58 which is a male blade side engaging portion and has a saw blade shape in the circumferential direction. Therefore, the male screw side engaging portion (male screw side unevenness 58) is formed on the outer side in the radial direction from the male screw portion 52 so as to have a diameter equal to or greater than the diameter of the crest of the male screw portion 52. The male screw side irregularities 58 are engaged with each other even if a relative rotational force in the loosening direction is applied while allowing relative rotation in the fastening direction between the male screw side irregularities 88 to be a female screw side engaging portion described later. An engagement mechanism 90 (see FIG. 2A) is configured. In addition, although the case where unevenness | corrugation was made into the shape of a saw blade was illustrated here, this invention is not limited to this, Various shapes, such as a wave shape, a mountain shape, an embossing type | mold, are applicable.

  As shown in FIG. 2B, the female screw body 60 is inserted into the through holes of the brackets 110 and 130, and the female screw side tubular portion 80 is formed with an internal screw portion 82 on the inner periphery of the hole drilled in the axial direction. And is formed on the base end side of the female screw side cylindrical portion 80 (on the side opposite to the male screw side head portion 40 serving as a mating member with respect to the female screw portion 82), and is more radially expanded than the female screw side cylindrical portion 80. And a female screw side head 70.

  The female screw side cylindrical portion 80 is formed with a female screw side taper portion 68 on the male screw body 30 side (that is, the tip side) with respect to the female screw portion 82. In the present embodiment, the female thread side taper portion 86 is formed in the vicinity of the distal end side of the inner peripheral surface of the female thread side tubular portion 80 and extends toward the distal end. That is, the female screw side taper portion 86 is formed at the edge of the hole of the female screw side cylindrical portion 80. Further, on the outer peripheral surface of the female screw side taper portion 86, a female screw side unevenness 88 having a saw blade shape in the circumferential direction, which becomes a female screw side engaging portion, is formed in an overlapping manner. Accordingly, the female screw side engaging portion (female screw side unevenness 88) is formed on the outer side in the radial direction with respect to the female screw portion 82 so as to have a diameter equal to or greater than the diameter of the valley of the female screw portion 82.

  The female screw side head portion 70 has a flange shape or a head shape, and the peripheral edge 70A is constituted by a thin member inclined toward the tip end. The peripheral edge 70A is brought into contact with the second bracket 130 (see FIG. 2 (A)), and can be elastically deformed in the axial direction by a fastening force. A regular hexagonal engagement hole 72 for engaging with a fastening jig (hexagonal wrench) is recessed in the end face of the female screw side head portion 70. The female screw side head 70 is extended and extended in the axial end portion of the outer periphery of the main body of the female screw body 60.

  The hinge structure 100 includes a first bracket 110 and a second bracket 130. The first bracket 110 has a first sleeve portion 112 and a first arm portion (base portion) 114 continuous with the first sleeve portion 112, and a first through hole 112A formed in the first sleeve portion 112 (FIG. 2A). )), The internal thread side cylindrical portion 80 is inserted. The first arm portion 114 swings around the male screw side cylinder portion 80 as a rotation axis.

  The second bracket 130 has a pair of second sleeve portions 132 disposed at a predetermined distance in the axial direction, and a second arm (base) portion 134 continuous therewith. The female screw side tubular portion 80 is inserted into the second through hole 132A (see FIG. 2A) formed in the portion 132. The second arm portion 134 rotates with the female screw side tubular portion 80 as a rotation axis. The first sleeve portion 112 of the first bracket 110 is disposed between the pair of second sleeves 132. Accordingly, the first arm portion 114 and the second arm portion 134 swing relatively.

  As shown in FIG. 2 (A), the present fastening structure 1 is formed by the male screw side head 40 and the female screw side head 70 by screwing the male screw portion 52 of the male screw body 30 and the female screw 82 of the female screw body 60 together. The first and second brackets 110 and 130 are sandwiched.

  Substantially the entire shaft part 50 of the male screw body 30 is accommodated in the female screw side cylinder part 80. As a result, the shaft portion 50 does not come into contact with the external member, and the outer peripheral surface of the single female screw side tubular portion 80 is combined with the inner peripheral surfaces of the through holes 112A and 132A of the first and second brackets 110 and 130. Since it can be made to oppose, the precision of an axial center can be raised easily. In addition, as shown in FIG. 3, even if the first and second brackets 110 and 130 move relative to each other (oscillate) at any angle, the frictional force generated by the relative movement is generated by a single female screw side cylinder 80. Acts on the outer peripheral surface of Thereby, the relative movement between the brackets and the relative rotation in the loosening direction of the male screw body 30 and the female screw body 60 can be separated, so that the screw does not loosen over a long period of time.

  Further, in the fastening structure 1, the female screw side taper portion 86 and the male screw side taper portion 56 are brought into contact with each other. At this time, a gap S is formed between the distal end (protruding end) 80A of the female screw side cylindrical portion 80 and the seat surface 40A of the male screw side head portion 40. Therefore, by adjusting the amount of the gap S by the fastening force of the screw body, it is possible to appropriately press the female screw side taper portion 86 and the male screw side taper portion 56, and the surface pressure is increased and the frictional force is increased. It becomes difficult to loosen. In particular, in the present embodiment, since the engagement mechanism 90 is further superimposed on the tapered portions 86 and 56, relative rotation in the loosening direction can be reliably restricted. Furthermore, by using this gap S to adjust the screw fastening force and changing the amount of elastic deformation of the female screw side head 70, a preload can be applied between the female screw side head 70 and the male screw side head 40. . By this preload, the frictional force between the first sleeve portion 112 and the second sleeve 132 can be adjusted, so that the smoothness of the swinging motion of the hinge structure 100 can be finely adjusted. In addition, since the preload once adjusted does not change due to the presence of the engagement mechanism 90, the movement of the hinge structure 100 can be stabilized over a long period of time.

  Further, in the hinge structure 100, the male screw side head 40 and the female screw side head 70 are brought into contact with the side surfaces of the pair of second sleeve portions 132, 132 in the second bracket 130. Since the pair of second sleeves 132 and 132 do not move relative to each other, no matter how the hinge structure 100 is swung, no external force is generated that causes the first male screw side head 40 and the female screw side head 70 to rotate relative to each other. . This also has the effect of preventing the screws from loosening.

  In the fastening structure 1 of the first embodiment, the structure in which the female screw side head 70 is elastically deformed to apply the preload is illustrated, but the present invention is not limited to this, and the seat portion of the male screw side head 80 The preload may be applied by inclining and elastically deforming 40A.

  Moreover, in the fastening structure 1 of the first embodiment, the case where the male screw body 30 and the female screw body 60 are relatively rotated by forming the engagement hole 72 in the female screw side head 70 and engaging the tool is illustrated. However, the present invention is not limited to this. For example, the external shape of the female screw side head 70 is a non-circular shape (for example, a polygon, a protrusion, an ellipse, and an eccentric circle) with respect to the screw shaft, and a recess similar to this shape is formed on the second bracket 130 side. May be. By engaging the female screw side head portion 70 with the concave portion of the second bracket 130, the rotation of the female screw body 60 can be restricted. In addition, you may engage the internal thread side head 70 and the 2nd bracket 130 in the circumferential direction by another structure instead of a recessed part.

  Next, the fastening structure 1 of 2nd embodiment is demonstrated with reference to FIG. 4 (A). In addition, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol here about the member relevant to 1st embodiment, and it demonstrates centering on a different point from the fastening structure of 1st embodiment.

  In this fastening structure 1, the cylindrical portion 54 is formed longer than the first embodiment in the shaft portion 50 of the male screw body 30, and is closer to the male screw portion 52 side of the cylindrical portion 54. Concavities and convexities 58 (male screw side engaging portions) are formed so as to overlap the male screw side tapered portion 56. In the cylindrical portion 54, a step portion 54A is formed at the boundary between the male screw side tapered portion 56 and the remaining portion, and a gap S is formed between the step portion 54A and the tip 80A of the female screw side cylindrical portion 80. The Therefore, in the second embodiment, the entire shaft portion 50 is not accommodated in the female screw side tubular portion 80, and a part (base end side) of the cylindrical portion 54 is opened to the outside. That is, the outer peripheral surface of the cylindrical portion 50 of the male screw body 30 and the outer peripheral surface of the female screw-side cylindrical portion 80 constitute a swing shaft having a hinge structure. The gap S is preferably located in the first sleeve portion 112 of the first bracket 110. Even if the first bracket 11 swings or the second bracket 130 swings, no relative rotation occurs between the male screw body 30 and the female screw body 60.

  Next, the fastening structure 1 of 3rd embodiment is demonstrated with reference to FIG. 4 (B) and (C). In addition, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol here about the member relevant to 1st and 2nd embodiment, and it demonstrates centering on a different point from the fastening structure of 1st and 2nd embodiment.

  In the fastening structure 1, a step portion 54 </ b> A is formed between the cylindrical portion 54 and the male screw portion 52 in the shaft portion 50 of the male screw body 30, and the male screw extends in the direction perpendicular to the axial direction on the end surface of the step portion 54 </ b> A. Side irregularities 58 (male thread side engaging portions) are formed. Further, as shown in FIG. 4C, a female screw side unevenness 88 (female screw side engaging portion) is also formed at a step portion at the tip of the female screw side cylindrical portion 80 (that is, an end surface of the tip 80A). Therefore, by engaging the male screw body 30 and the female screw body 60, the male screw side unevenness 58 and the female screw side unevenness 88 are engaged, and the engagement mechanism 90 can be configured. A regular hexagonal engagement protrusion 73 is provided at the shaft end of the female screw body 30. A fastening work can be performed by engaging a tool with the engaging protrusion 72.

  Next, the fastening structure 1 of 4th embodiment is demonstrated with reference to FIG. 5 (A) and (B). In addition, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol here about the member relevant to 1st thru | or 3rd embodiment, and it demonstrates centering on a different point from the fastening structure of 1st thru | or 3rd embodiment.

  In the fastening structure 1, a male screw side unevenness 58 (male screw side engaging portion) is formed on the seat surface 40 </ b> A of the male screw side head 40 in the male screw body 30 so as to spread in a direction perpendicular to the axial direction. That is, the male screw side head 40 itself of the male screw body 30 is a stepped portion for forming the male screw side unevenness 58. Further, as shown in FIG. 5B, the female screw side irregularities 88 (female screw side engaging portions) are also formed at the stepped portion at the tip of the female screw side cylindrical portion 80 (that is, the end surface of the tip 80A). Therefore, when the male screw body 30 and the female screw body 60 are screwed together, the distal end 80A of the female screw side cylindrical portion 80 and the seat surface 40A come close to each other, and the male screw side unevenness 58 and the female screw side unevenness 88 are engaged. 90 can be configured. The substantially whole shaft part 50 of the male screw body 30 is accommodated in the female screw side cylinder part 80.

  Next, the fastening structure 1 of 5th embodiment is demonstrated with reference to FIG. 6 (A) and (B). In addition, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol here about the member relevant to 1st thru | or 4th embodiment, and it demonstrates centering on a different point from the fastening structure of 1st thru | or 4th embodiment.

  In the fastening structure 1, a male screw side taper portion 56 is formed on the end surface of the cylindrical portion 54 on the male screw portion 52 side in the shaft portion 50 of the male screw body 30, and the male screw side unevenness 58 is superimposed on the male screw side taper portion 56. It is formed.

  The female screw body 60 is a so-called nut, and the outer peripheral surface has a regular hexagonal shape. A female screw side taper portion 86 facing the male screw body taper portion 56 is formed on an end surface of the female screw body 60 on the male screw body 30 side, and a female screw side unevenness 88 is formed on the female screw side taper portion 86 in an overlapping manner. Therefore, by engaging the male screw body 30 and the female screw body 60, the male screw side unevenness 58 and the female screw side unevenness 88 are engaged, and the engagement mechanism 90 can be configured. A spring washer 98 is disposed between the female screw body 30 and the female screw body 60, and a predetermined fastening force is applied to the first and second brackets 110 and 130 by elastic deformation thereof.

  As mentioned above, in the said embodiment, the raw material of an external thread body or an internal thread body is not specifically limited, A metal, resin, etc. can be selected suitably. One can be a metal and the other a resin. The same applies to the first and second brackets.

  The present invention is not limited to the above-described embodiments, and various changes can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Screw body fastening structure 30 Male screw body 40 Male screw side head part 50 Shaft part 52 Male screw part 54 Cylindrical part 56 Male screw side taper part 58 Male screw side uneven part 60 Female screw body 70 Female screw side head part 70A Periphery 72 Engagement hole 80 Female screw side cylinder Part 82 female thread part 86 female thread side taper part 88 female thread side unevenness 90 engaging mechanism 100 hinge structure 110 first bracket 130 second bracket

Claims (14)

A fastening structure of a fastening body having a male screw body and a female screw body,
The male screw body is
Male screw side head,
A male thread,
A male screw side engaging part formed on the male screw side head side than the male screw part,
The female screw body is
A female screw side cylindrical portion configured in a cylindrical shape;
A female thread portion that is formed on the inner periphery of a hole that is drilled in the axial direction in the female thread side tubular portion and is screwed into the male thread portion;
An internal thread side engaging portion that is formed closer to the external thread side engaging portion than the internal thread portion in the internal thread side tubular portion and engages with the external thread side engaging portion in the circumferential direction;
A female screw side head portion extending in the outer periphery of the female screw side cylindrical portion, and having a polygonal shape, a protrusion shape, an elliptical shape, an eccentric circular shape, a non-circular shape, a flange shape, or a head shape, Prepared,
In the state where the female screw side cylindrical portion is inserted into the body to be fastened, the male screw portion and the female screw portion are screwed together, so that the fastened body is restricted in the axial direction by the male screw side head and the female screw side head. On the other hand, the male screw side engaging portion and the female screw side engaging portion are engaged, and an engagement mechanism is formed that maintains the engaged state even when a relative rotational force in the loosening direction is applied. Features
Fastening structure of the fastening body. The male screw body is
In the shaft portion including the male screw portion, the male screw side engaging portion is formed radially outward so as to have a diameter equal to or greater than the diameter of the mountain of the male screw portion,
The female screw body is
The female screw side engaging portion is formed on the radially outer side so as to have a diameter equal to or greater than the diameter of the valley of the female screw portion,
The fastening structure of the fastening body according to claim 1. The male screw body has a male screw side taper portion disposed closer to the male screw side head side than the male screw portion,
The female screw body has a female screw side taper portion disposed on the male screw side head portion and facing the male screw side taper portion with respect to the female screw portion,
The male screw side taper portion and the female screw side taper portion are brought into contact with each other by screwing the male screw portion and the female screw portion,
The fastening structure of the fastening body according to claim 1 or 2. The male screw side engagement portion and the male screw side taper portion are formed to overlap,
The female screw side engagement portion and the female screw side taper portion are formed to overlap,
The fastening structure of the fastening body according to claim 3. In the state where the female screw side taper portion and the male screw side taper portion abut, a gap is formed between the protruding end of the female screw side cylindrical portion and the male screw body,
The fastening structure of the fastening body according to claim 3 or 4. The gap is formed between a protruding end of the female screw side cylindrical portion and the male screw side head,
The fastening structure of the fastening body of Claim 5. The male screw body has a male screw side step portion disposed closer to the male screw side head side than the male screw portion, and the male screw side engaging portion is formed on an end surface of the male screw side step portion. And
The fastening structure of the fastening body in any one of Claims 1 thru | or 6. The male screw side stepped portion is a seating surface facing the female screw body side in the male screw side head,
The female screw side engaging portion is disposed at a protruding end of the female screw side cylindrical portion ,
The fastening structure of the fastening body according to claim 7. At least one of the male screw side head or the female screw side head is elastically deformable in the axial direction,
The fastening structure of the fastening body in any one of Claims 1 thru | or 8 . The shaft portion including the male screw portion of the male screw body is accommodated in the hole.
The fastening structure of the fastening body in any one of Claims 1 thru | or 9 . The engagement mechanism has a ratchet structure that allows relative rotation in the fastening direction.
The fastening structure of the fastening body in any one of Claims 1 thru | or 10 . An engagement portion for engaging with a fastening jig is provided on the end face of the female screw body as a recess and / or a protrusion.
The fastening structure of the fastening body in any one of Claims 1 thru | or 11 . A fastening body comprising either the male screw body or the female screw body according to any one of claims 1 to 12 . The fastening structure of the fastening body according to any one of claims 1 to 12 , is applied,
As a fastened member
A first bracket having a first sleeve part in which the first through hole is formed and a first base part continuous with the first sleeve part;
A second bracket having a pair of second sleeve portions formed with the second through-holes and arranged at a predetermined distance in the axial direction and a second base portion continuous with the second sleeve portions;
The first sleeve portion is disposed between the pair of second sleeves,
Using the first through hole and the second through hole, the male screw body and the female screw body fasten the first bracket and the second bracket so that the first base portion and the second base portion are A hinge structure configured to be capable of relative rotation.

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