JP2017223346A - Anti-loosening fastening member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastening member in which members formed into two conical shapes are fitted to each other and a wedge effect caused by their press contacting is utilized.SOLUTION: A fastening member of this invention is constituted by two members of a first fastening member A and a second fastening member B, a fastening portion for fastening a fastened body of the fastening member A is applied with A6 tapered portion of which diameter is gradually reduced from its extremity end toward a head part direction, the diameter reduced end is cut by 360 degrees in A3 slant direction. This invention is a fastening member in which a thin flat iron plate of a second fastening member B1 is applied to wind and fit to the A6 part, its outer diameter is formed to have the same diameter as the outer diameter of A first fastening member A2 bolt shaft and B4 aligned end surface of B1 second fastening member is applied with a clearance of the same spacing in slant manner from the head part toward the extremity end direction and a shape of the B2 head corner portion is bent toward the outer side direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fastening member that fastens a body to be fastened by two conical-shaped press-contacts, and that fastens and fastens the member with a strong press-contacting action by the fastening member, and more particularly suitable for a loosening-preventing action. It is related with the fastening member provided with.

  Nuts and bolts have been widely used in various fields as fastening members used for tightening and fixing parts and members. These nuts and bolts are used to tighten and fix parts and members, but there is a problem that the nuts and bolts loosen when vibrations repeatedly act on these fastening parts. The use of flat washers and spring washers is often used.

  However, even if a flat washer or a spring washer is used, the problem that the nut and the bolt loosen depending on the application has not been solved. For this reason, many means and methods have been proposed for locking nuts and bolts, and some of them have been put into practical use. For example, a locking nut disclosed in Japanese Patent No. 4495849 (Patent Document 1) is composed of a lower nut and an upper nut in which screw holes are formed in a penetrating manner, and the lower nut has an axial direction around the screw hole. A convex portion having a tapered outer peripheral surface that decreases in diameter outward is formed, and the outer peripheral surface of the convex portion is eccentric by a minute amount with respect to the screw hole, and the convex portion of the lower nut is fitted to the upper nut. A concavity is formed, and the inner peripheral surface of the concavity is concentric with the screw hole. In this way, by decentering the convex portion and the concave portion, when the nuts are tightened, the nuts are displaced in the radial direction with respect to the screw hole shaft core, respectively, and the radial stress acts on the screw shaft. The wedge is stopped by the wedge effect.

  Further, in the locking nut disclosed in Japanese Patent Laid-Open No. 2005-140272 (Patent Document 2), a groove portion is cut out from the outer peripheral surface of the nut from the outer peripheral surface to the female screw axis of the nut 3 from both directions of the outer peripheral surface. When the female screw of the bolt is screwed into the male screw of the bolt fixed to the fastening object and a predetermined tightening is performed, a loosening prevention member made of an elastic material is inserted into the groove of the nut so that the male screw peripheral surface of the bolt and the male screw It is made to prevent loosening by making it press-contact with the valley slope of this.

  The locking nut exemplified in Patent Document 1 uses a so-called double nut to prevent locking, but the direction of the screws of the two nuts and the bolt is the same, and the double nut is caused by repeated action of vibration. The problem of loosening due to rotation still remains. Also, in the locking nut illustrated in Patent Document 2, the nut is pressed against the male thread circumferential surface of the bolt in a pressurized state, and may be loosened due to repeated vibrations. There was a poor problem.

  In order to solve this problem, for example, in Japanese Patent No. 5548532 (Patent Document 3), when a fastened body is fastened by using a screw fastening action by a bolt and nut fastening member, A taper cylinder formed in a cylindrical shape that gradually increases in diameter from a pressure contact surface on which a seat surface of a tightening member is pressed against a washer surface pressed against a fastened body, in a locking stopper washer sandwiched between The body portion and the pressed contact surface are provided with a concave portion in which the seating surface side of the fastening member is fitted so that the centering can be performed in order to align the axial center of the fastening member.

Japanese Patent No. 4495849 JP 2005-140272 A Japanese Patent No. 5548532

  However, in the slack stopper washer disclosed in Patent Document 3, a tapered tubular body formed into a tubular body that gradually expands in diameter from a pressure-contact surface that the seat surface press-contacts to a washer seat surface that press-contacts the fastened body. And a loosening washer provided with a recessed step portion into which the seating surface side of the fastening member is fitted so that centering for aligning the shaft core with the fastening member can be performed on the pressure contact surface. This slack-proof washer shape is clamped and clamped between the body to be fastened and the bolt or nut. However, the flat contact surface increases and slip rotation occurs in vibration and impact with respect to the right angle of the bolt axis, resulting in loosening. Cause.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a fastening member that can have a function of preventing loosening with a simple structure, can be used repeatedly, and has a wide range of use. In addition, the present invention provides a fastening member that is easy to manufacture and inexpensive because it is easy to use and has a simple anti-slack function even in places where vibration and impact are severe and environments with extremely severe temperature changes. The purpose is to provide.

  The present invention has the following configuration in order to achieve the above object. That is, it is a fastening member that fits two cone-shaped members and fastens the fastened body by the pressing contact, and the fastening member includes two members on the first fastening member and the second fastening member. It is the fastening member divided into. The first fastening member is a first fastening member including a fastening tool mounting portion (head) and a fastening portion to be fastened by a body to be fastened or a screwless nut or the like. A shaped bolt shaft extends in the distal direction and is integrally formed. The conical shape is gradually reduced in diameter from the tip toward the head. The position is the 1st fastening member characterized by giving to the to-be-fastened body or appropriate fastening positions, such as a screwless nut.

  In addition, the reduced diameter end near the head, which is applied to the conical shape of the fastening part in the previous period, is a first fastening member characterized in that it is cut obliquely 360 degrees to the left and right.

  The outer peripheral surface of the fastening portion provided in the conical shape of the previous fastening member is wound with a flat iron plate having a different vertical thickness so as to have the same diameter as the outer peripheral diameter of the columnar shape of the first fastening member. The reduced-diameter cut end close to the head is cut obliquely in the same manner as the end close to the first fastening portion head and 360 ° obliquely cut, and the ends are brought into close contact with each other. The second fastening member.

  The mating end surface obtained by winding and fitting the second fastening member around the first fastening member fastening portion is a second fastening member characterized in that a gap is provided at the same interval diagonally from side to side in the tip direction.

  The fastening member is characterized in that one end of a corner near the head portion of the fastening part alignment end portion is bent slightly outward.

  The fastening member can be manufactured from a material such as metal or reinforced plastic.

  According to the present invention, the fastening portion of the A first fastening member is tapered so as to have a diameter reduced from the tip of the A5. It consists of a B1 second fastening member wound around the A4 fastening portion by a B2 second fastening member flat iron plate, and its outer shape is applied to the same diameter as the A2 shaft portion of the A fastening member. Bend one end of the B2 corner of the second fastening member close to the B4 mating end surface gap so that resistance is generated on the inner surface of the through hole when the fastening member is inserted into the through-hole to be fastened of D1 and D2. In this case, a pressing contact is applied, an appropriate resistance is generated, idling is prevented, and a tightening frictional force can be maintained.

  In addition, since the A3 reduced diameter end near the head, which is formed in the conical shape of the fastening portion of the A first fastening member, is cut obliquely 360 degrees to the left and right, the fastening member is inserted into the D1 and D2 fastened body through holes. When the seating surface part is brought into contact with the surface to be fastened, the fastening rotation is performed while generating an appropriate resistance. At the same time, the first fastening member and the second fastening member are cut diagonally at A3 360 degrees. The ends of the first fastening members A3 that are in close contact with each other press the end of the second fastening member B2, and the B1 second fastening member moves slightly in the distal direction. At this time, the second fastening member is already pressed into contact with the first fastening portion taper portion by the amount of movement in the distal direction, and a strong pressing contact is pressed against the entire inner surface of the through-hole to be fastened to maintain the fastening effect. it can.

  Furthermore, since the gap between the B4 end faces where the second fastening member is wound around and fitted to the first fastening member fastening portion is provided at the same interval diagonally from side to side in the direction from the head, tightening torque is reduced. As it is gradually raised, the diagonal gaps are screwed in. At the same time, the first fastening member A6 taper shaft is similarly gradually screwed in the distal direction, and a strong pressing contact and a tensile friction force are generated between the contact surface of the first fastening member head seat surface and the body to be fastened. A strong anti-loosening effect can be achieved.

  Furthermore, D1 and D2 to-be-fastened bodies can be fastened by the member formed in the nut without a screw | thread to the fastening member of this invention. A fastening member in which the B1 second fastening member is fitted to the A fastening member is inserted into the through-holes to be fastened to D1 and D2, and an E nut is screwed into the tip portion of A5. Rather than initially tightening at the E nut portion, the fastening member head is slightly rotated to lightly engage the B2 fastening portion with the inner surface of the E nut. Thereafter, the E nut is fastened with a predetermined tightening torque. The outer peripheral surface of the second fastening member is already firmly pressed against the inner side surface of the E nut, and the E nut seat surface and the A bolt seat surface portion are firmly crimped to the D1 / D2 fastened body contact surface. It is possible to raise gradually and reach a predetermined axial force to further improve the locking effect.

  In addition, the fastening member of the present invention can be manufactured using a material such as metal, reinforced plastic, or resin, and the loosening-fastening effect can have a certain effect depending on the material.

It is a fastening member concerning the present invention. It is sectional drawing which fitted the 1st fastening member and the 2nd fastening member. It is sectional drawing which shows the fastening state to the to-be-fastened body of the fastening member in connection with this invention. It is a fastening member concerning the present invention. It is sectional drawing which fitted the 1st fastening member and the 2nd fastening member. It is sectional drawing which showed the fastening member in connection with this invention to the to-be-fastened body through-hole by the insertion state with a screwless nut. It is a head top view of the 1st fastening member in connection with this invention. It is sectional drawing which screwed the screwless nut to the fastening member in connection with this invention. It is a top view of a screwless nut concerning the present invention. It is a 1st fastening member elevation which concerns on this invention. It is a 2nd fastening member top view concerning this invention. It is a 2nd fastening member sectional view concerning the present invention. It is a 2nd fastening member bottom view concerning this invention. It is a top view which winds a 2nd fastening member flat iron plate around the 1st fastening member in connection with this invention. It is sectional drawing of the 2nd fastening member flat iron plate in connection with this invention. It is a 2nd fastening member top view concerning this invention. It is a 2nd fastening member elevational view in connection with this invention. It is a 2nd fastening member bottom view concerning this invention.

  A fastening member that fits two cone-shaped members and fastens a fastened body by press contact. The fastening member is divided into a first fastening member and a second fastening member. It is the fastening member which is. The first fastening member is formed integrally with a tool mounting portion (head portion) and a cylindrical bolt shaft extending from the head portion in the distal direction. It is a first fastening portion that is applied in a conical shape that is gradually reduced in diameter in the head direction from the tip. The diameter-reduced head end of the cone-shaped surface is inclined 360 degrees, and a flat iron plate having a different vertical thickness is wound around the first fastening portion, and the outer diameter is the same as the outer diameter of the bolt shaft. The head end that is the second fastening member and has a conical shape is an end face that is fitted to the first fastening member head diameter-reduced end that is inclined 360 degrees. The fastening member has an end face that is diagonally spaced at the same interval from the head end face to the tip direction, and a corner of the end face near the head is slightly bent outward.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 and 2 show a state in which a body to be fastened is fastened by a fastening member according to the present invention, and fastened by a fastening member in which a second fastening member of B1 is fitted to a first fastening member as a first embodiment. An example is shown. For example, a fastening hole D1 and D2 formed by superimposing one or two kinds of metal or synthetic resin plates are provided with a fastening hole having the same diameter as the A2 bolt shaft diameter of the fastening member. The fastening member of the present invention made of reinforced plastic is inserted.

  A tip portion of the first fastening member is formed with a fastening portion formed in a taper shape, and the position thereof has a conical shape gradually reduced in diameter from the tip of the A2 bolt shaft toward the head portion of the A1 bolt shaft. It has been subjected. The formation position is given to appropriate fastening positions, such as a to-be-fastened body or a screwless nut. Further, as shown in FIG. 1, the diameter-reduced end A3 near the head at the tightening position is cut obliquely by 360 degrees, and the inclination angle is appropriately about a normal screw lead angle. Further, the A6 forming angle formed in the conical shape is appropriately an inclination angle of 2 to 3 degrees with respect to the A bolt shaft.

  On the other hand, the B second fastening member is wound around the outer peripheral surface of the A6 fastening portion formed in a conical shape by a B1 second fastening member flat iron plate having a different vertical thickness, and the outer diameter of the fastening portion is the outer diameter of the bolt shaft of A2. And the same diameter. Further, the B3 diameter-reduced cut end closer to the head is a fastening member formed at the same angle as the A3 360 ° oblique end, closely contacting each other, and fitting the entire A / B fastening portion.

  Further, the B4 fitting end surface obtained by winding and fitting the B second fastening member of FIG. 1 around the A1 fastening member is provided with a B4 gap at the same interval obliquely from side to side in the left-right direction. Moreover, the fastening member given in the shape which bent the B2 corner end near the matching end surface head of B4 a little in the outward direction.

  Next, a method of fastening the fastening member configured as described above to a body to be fastened of materials D1 and D2 such as metal or synthetic resin will be described. First, the fastening member in which the A first fastening member B and the second fastening member are integrally fitted is inserted into the D1 and D2 fastened body through-holes, and at this time, the B second fastening member close to the mating end face of B2 Since one end of the corner is slightly bent outward, a gap C1 is provided. Therefore, it is possible to obtain a frictional resistance in which elasticity is applied to the inner surface of the fastened body through hole of D1 and D2. Further, the B outer surface of the B2 second fastening member is strongly attached to the side surface of the D2 body to be fastened while the end surface cut into the A3 360 degree oblique end of the A fastening member is pressed and brought into pressure contact with the B3 360 degree oblique end portion. It can be inserted while being pressed against.

  The fastening member seating surface portion is brought into contact with the D1 body contact surface, and the A1 fastening member head is tightened and rotated to a predetermined torque with a tool such as a spanner or a torque wrench. At this time, strong frictional resistance has already occurred on the outer peripheral surface of the A / B fastening member and the inner peripheral surface of the fastened body D2. As the tightening rotation is gradually increased, the A3 360-degree oblique end portion pushes down the B3 oblique end portion, and the A6 taper shaft surface is also simultaneously generated and pushed down. A strong axial force is born and a strong fastening can be achieved.

  On the other hand, a strong press-contact is applied to the outer peripheral surface of the AB fastening member and the side surface of the D2 body to be fastened, and at the same time, a gap is given to the mating end surface of the B fastening member B4 obliquely from side to side in the left-right direction. For this reason, the B3 oblique end portion is pushed down by the 360 ° end face contact portion of A3, and at the same time, while the mating end face of B4 is slightly twisted, the side surface of the D2 body to be fastened is rotationally pressed and pushed down toward the distal end to generate a strong fastening force. In addition, in the normal fastening of bolts and nuts, the seat surface portion of the bolt nut is brought into contact with the contact surface of the body to be fastened, and then rotated to a predetermined torque with a torque wrench tool or the like. Can only rotate about 60 degrees. If it is further rotated, it will not be able to be rotated because it reaches plastic deformation or fracture of the bolt. The same applies to the fastening member of the present invention, and the rotation angle can be increased to a predetermined torque within about 60 degrees after the seat surface portion comes into contact with the fastened body contact surface. When the fastening member is fastened while rotating as described above, a pressing contact is generated between the side surfaces of the D2 body to be fastened, a gap C is formed, and an axial force due to a strong pressure is generated and fastening is performed.

  FIG. 3 is an elevational sectional view in which the above-described fastening members A and B are fitted. FIG. 4 is a cross-sectional view in which the A and B fastening members described above are inserted into the fastened body through holes of D1 and D2 and fastened with nuts without E screws. The fastening method will be described. The fastening member in which the B second fastening member is fitted to the fastening portion of the A first fastening member is inserted into the through-hole of the fastened body in which one or two kinds of D1 and D2 metal or synthetic resin plates are combined. At that time, the bent portion of B2 of the B fastening member is gradually inserted while pressing and contacting the inner surface of the D1 and D2 through-holes to be fastened, and the gap of C of the A and B fastening portion gradually disappears due to elastic compression, The A / B fastening body is fixed by applying an elastic pressure contact force to the A / B fastening portion and the inner side surface of the fastened body through-hole of D2.

  FIG. 4 shows an example in which a D1 / D2 body to be fastened is fastened with an E-threadless nut by a fastening member fitted with an A / B fastening member as a second embodiment of the fastening member according to the present invention. An E-threadless nut is screwed onto the leading end protruding portion of the fastening member from the D1 and D2 fastened bodies shown in FIG. 4, and the seat surface portion is brought into contact with the fastened body surface. Next, turn the A1 fastening member head with a tool or the like while holding the E nut. At that time, the second end of B1 is slightly pressed against the oblique end of B3 and the outer peripheral surface of the fastening member is pressed against the inner surface of the E nut. Next, when the E nut side is rotated to a predetermined torque with a tool, a torque wrench, or the like, a B4 top and bottom diagonally aligned end surface is applied. While the gap is gradually twisted, the outer peripheral surface of the B2 fastening member B and the A6 taper shaft surface are simultaneously rotationally pressed in the distal direction and tightened with a firm tightening axial force.

  Next, FIGS. 5, 6, and 7 will be described. The above-described A / B fastening members and E threadless nuts have been described with ordinary hexagonal members, but the fastening member seating surface portions shown in FIGS. 5, 6, and 7 are disk-shaped. The fastening member is characterized in that it has a seating surface area different from that of the fastening member described above, maintains a high frictional force, is stably held by a tightening torque axial force, etc., and maintains a loosening prevention effect. It is a fastening member that can. The first embodiment and the second embodiment described above are different in the seating surface portion, and the others are configured in the same manner, and detailed description thereof will be omitted.

  FIG. 8 is an elevational view of the A first fastening member, in which a cylindrical bolt shaft extends from the head of A1 toward the tip, and is gradually reduced in diameter from the tip toward the head. It has been subjected. The position is given to an appropriate tightening position such as a body to be fastened or a screwless nut, and the reduced diameter end A3 is given to a 360 ° oblique end. The diameter-reduced end is given a small diameter of several millimeters with respect to the outer diameter of the bolt shaft, and the angle given to the A3 360 ° oblique end may be about the lead angle of a normal screw.

  9, FIG. 10 and FIG. 11 are sectional views of the B second fastening member, FIG. 9 is a top view thereof, and FIG. 11 is a bottom view thereof. The 360-degree oblique end of B3 is formed at the same angle as the oblique end of A3. The outer diameter of the second fastening member of B1 wound around and fitted to the first fastening portion of A4 is made the same diameter as the outer diameter of the bolt shaft of A2, and the gap between the end faces of B4 is from the head of B3. A gap is provided at the same interval diagonally left and right in the distal direction. This gap is pressed against the side of the body to be fastened while being screwed in at the time of fastening. Further, by bending the B2 bent portion of the B second fastening portion in the outward direction, the inner surface of the fastened body through-hole can be pressed and pressed while generating elasticity, and can be fastened and fastened.

  FIG. 12 is a plan view of winding a flat iron plate having a different thickness on the second fastening member B1 on the A4 first fastening portion. The flat iron plate of B1 in FIG. 13 is obtained by winding a thin flat iron plate having a different vertical thickness around the A4 fastening portion. The flat iron plate of B1 is preferably a thin flat iron plate as much as possible, and the taper portion of A6 is relative to the bolt shaft of A2. This is because if the angle of inclination is small, a strong pressure contact force can be obtained with a small amount of frictional resistance. A thin flat iron plate is preferable as much as possible, and manufacturing such as forging can be easily performed and provided at low cost.

  14, FIG. 15 and FIG. 16 are B2 second fastening members, and FIG. 15 is an elevation view thereof. The gap between the end faces of the B2 fastening member B4 is provided at the same interval obliquely from side to side in the tip direction from the B3 head. Further, the head B3 is formed at an angle of 360 degrees, and the angle is preferably about the lead angle of the screw. FIG. 14 is a top view thereof, and FIG. 16 is a bottom view thereof. Further, although the first fastening member and the second fastening member described above have been described using materials made of metal, they can also be manufactured using materials such as resin or reinforced plastic.

  Although the present invention has been specifically described above based on the embodiments of the present invention, it is needless to say that the present invention is not limited to the above and can be variously modified without departing from the gist thereof. In each of the above-described embodiments, the example in which the head portion of the first fastening member bolt is formed in a hexagon is shown. However, the shape may be changed to a hexagon socket head bolt or a flange bolt. You may change into the shape of a screw and a trust head machine screw.

  INDUSTRIAL APPLICABILITY The present invention can be used for fastening a body to be fastened used in a machine tool, an electric tool, a vehicle, a construction, a building, a railway, an aircraft, and the like.

A 1st fastening member A1 Head A2 Bolt axis A3 360 degree diagonal cut end A4 1st fastening part A5 1st fastening member tip B 2nd fastening member outer peripheral surface B1 2nd fastening member B2 Bending part B3 360 degree oblique cutting end B4 Alignment end face clearance C1 Clearance C2 Fastened body gap D1 Fastened body D2 Fastened body E Screwless nut

Claims (6)

  A fastening member that fits two members formed in a conical shape and fastens the body to be fastened by pressing, and the fastening member is divided into a first fastening member and a second fastening member. It is the fastening member which is. The first fastening member is a first fastening member comprising a fastening tool wearing part (head) and a fastening part to be fastened by a body to be fastened or a screwless nut or the like. The bolt shaft extends in the tip direction and is integrally formed. The conical shape is gradually reduced in diameter from the tip toward the head. The position is the 1st fastening member characterized by being given to appropriate fastening positions, such as a to-be-fastened body or a screwless nut.   The reduced diameter end near the head, which is provided in the conical shape of the fastening portion, is a first fastening member characterized in that it is cut obliquely 360 degrees to the left and right.   The outer peripheral surface of the fastening portion provided in the conical shape of the fastening member is wound with a flat iron plate having a different vertical thickness so as to have the same diameter as the cylindrical outer peripheral diameter of the first fastening member. The reduced-diameter cut end near the head is cut obliquely in the same manner as the end cut at an angle of 360 degrees near the first fastening portion head, and the ends are in close contact with each other. It is the 2nd fastening member characterized.   The mating end surface obtained by winding and fitting the second fastening member around the first fastening member fastening portion is a second fastening member characterized in that a gap is provided at the same interval diagonally from side to side in the tip direction.   5. The fastening member according to claim 3, wherein one end of a corner near the fastening part alignment end face is slightly bent outward.   6. The fastening member according to claim 1, wherein the fastening member can be manufactured from a material such as metal or reinforced plastic.

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