JP4056539B2 - Automatic fastener - Google Patents

Description

  The present invention relates to an automatic fastening tool, and more specifically, a gap is provided between the fastening tool and the fastened member by mounting between the fastening member and one end of the fastening tool for fastening and fastening fastened members together. The present invention relates to an automatic fastener that automatically corrects so as not to cause any problems.

  In wooden construction, when joining beams, columns and beams, etc., fastening methods using metal fasteners such as metal bolts and nuts are often used. However, due to the nature of wood materials, the moisture evaporates and absorbs moisture over the course of construction, so dimensional changes are inevitable. There is a possibility that a gap is formed between the fixing tool and the beam. For example, it is said that the shrinkage is about 2 to 5% after 10 years from the construction, and there is a gap between the fastening parts of the fasteners to the wooden material, which may cause various adverse effects such as deterioration of earthquake resistance. There is sex.

  Therefore, when a wooden material is tightened with a bolt and a nut, a tightening device that has been provided with an automatic screw tightening function by always applying a biasing force to the bolt or nut tightening direction has been proposed (for example, Patent Document 1).

  This proposal uses a spring spring as a biasing means, engages one end of the spring spring with a bolt or nut in a non-rotatable manner, and engages the other end with the casing of the device. However, even if there is a gap between the wood material and the fixing tool due to a change in the wood material over time, the biasing force of the spring spring is always applied in the tightening rotation direction of the bolt or nut so that the gap between the bolt or nut is Is to prevent the occurrence of

JP-A-11-270538

  However, the above prior art is based on the premise that the bolt or nut is still rotatable after the completion of the construction work, and the bolt or nut is in a non-rotatable state after the completion of the construction work. There is a problem of not working. That is, in normal construction sites, after fixing with bolts or nuts, anti-rotation measures are taken such as applying anti-rust paint to the surface of bolts or nuts or attaching anti-rotation agents. Since the screw portion is generally solidified, it is impossible to rotate the bolt or the nut in the direction in which the bolt or the nut is easily tightened with an urging force of the order of the spring.

  That is, the above-described conventional spring spring is disposed in a narrow space in the casing in which the nut is fitted, and the torque is only about 50 kg · cm, and a large urging force cannot be exhibited. Even if the spring force of the mainspring spring is increased to rotate the bolt or nut on the side where the tightening device is mounted, the casing for storing the mainspring spring having a large spring force becomes larger than the width of the fastened member. , Can not be installed. Even if it is forcibly installed, the nut or bolt on the opposite side will also go around, and eventually the bolt or nut on the side with the tightening device attached will be rotated and tightened so that there is no gap between the bolt or nut with a gap. It cannot be lost.

  Therefore, in view of the above-described problems of the prior art, the object of the present invention is to prevent the rotation even if a detent treatment such as applying a rust preventive paint on the surface after mounting a fixing tool such as a bolt or a nut. An object of the present invention is to provide an automatic fastener capable of reliably preventing the occurrence of a gap according to the degree of deformation caused by a change.

The above object can be achieved by the inventions described in the claims. That is, the characteristic configuration of the automatic fastener according to the present invention is that the fastening tool and the fastening member are mounted by attaching between the fastening member and one end side of the fastening tool that fastens and fastens the fastening members together. An automatic fastener that automatically corrects so as not to cause a gap due to a change with time, and has an inclined surface that is inclined in the circumferential direction and is slidably mounted on the member to be fastened And a support member having a circumferentially inclined contact portion that supports the one end side of the fixing member and that engages with the inclined surface of the wedge member and is slidable along the inclined surface. and the member, the circumferential wedge action of the wedge member engages the said wedge member and the support member is advanced, and urging the support member in the clockwise direction as viewed from one end of the fastener constantly And an urging member.

  According to this configuration, when the contraction gradually progresses as a result of the secular change of the fastened member such as the wooden beam, the pillar, the base, the girder, the brace, and the rafter, the gap between the fixing tool and the fastened member is increased. However, when the gap begins to occur, the wedge member urged by the urging member starts to slide between the support member and the wedge member moves forward according to the gap amount. A gap does not occur even when the member changes with time, and no gap is generated between the fixing tool and the fastened member. In addition, since the inclined surface of the wedge member is inclined in the circumferential direction, a high inclined surface can be easily ensured only by changing the diameter, and the entire structure can be made compact. Also, with this configuration, even if the anti-rotation paint is applied to the surface of the fixing tool after mounting, for example, it is not necessary to rotate the fixing tool itself, The gap generated between the fastening member and the fastening member can be reliably prevented without any trouble.

  As a result, even if anti-rotation coating is applied to the surface after attaching a fastener such as a bolt or nut, the gap is reliably generated according to the degree of deformation due to changes over time. It was possible to provide an automatic fastener that could be prevented.

  It is preferable that the inclined surface of the wedge member is substantially equally divided into a plurality in the circumferential direction, and the inclined angle of each of the divided contact surfaces is 5 to 12 °.

  According to this configuration, an urging member with a smaller urging force can be used, and when the gap member is urged by the urging member due to the gap between the fixture and the fastened member, the larger the gap, the greater the gap. A so-called wedge effect, in which the effect of preventing the occurrence of a gap by increasing the fixing force between the fixing tool and the member to be fastened, can be exhibited more effectively. In addition, since the inclined surface of the wedge member is substantially equally divided into a plurality in the circumferential direction, the displacement in the rotational direction is evenly distributed in the circumferential direction, and the displacement is stably generated. Further, if the inclination angle is less than 5 °, it is necessary to increase the length of the wedge member in the traveling direction, and if it exceeds 12 °, the wedge effect is reduced and a biasing member having a stronger biasing force is required.

  Preferably, the biasing member is a coil spring, the wedge member has a support portion that supports and fixes one end of the coil spring, and the support member has a fixing portion that fixes the other end of the coil spring. .

According to this configuration, it is possible to reliably achieve a configuration in which the wedge member and the support member are always urged in one direction. Further, it is preferable that the coil spring is wound around the outer peripheral surface of the wedge member and the support member, and between each of the projecting portions projecting on the outer peripheral surface of the wedge member and the support member. Moreover, it is preferable that the wedge member or the support member is provided with a stopper mechanism that stops sliding movement of the wedge member. Further, prior to the fastening and fixing by the fixing tool, a temporary fixing screw hole for mounting a temporary fixing screw for preventing the wedge member and the support member from being urged and rotated by the urging member is provided. It is preferable to be formed on each of the wedge member and the support member.

Hereinafter, with respect to an automatic fastener according to an embodiment of the present invention, a case in which a fastener made of a combination of a metal bolt and a nut is used for connecting wood beams that are members to be fastened will be described as an example. Will be described in detail with reference to FIG.
<First Embodiment>
As shown in FIG. 1, when the two wooden beams A and B are fastened with bolts 1 and nuts 2, the automatic fastener G1 of the first embodiment is connected to the nut 2 via the washer 3 on the nut 2 side. It is inserted and installed between the beams A. That is, the automatic fastener G1 is configured so that the leg of the bolt 1 inserted through the lower washer 4 from the lower beam B to the upper beam A is inserted into the bolt insertion hole and The nut 2 fitted into the leg of the bolt 1 is fastened and fixed through a washer 3 on the nut 2 mounted on the beam A on the side. In FIG. 1, the automatic fastening tool G1 is inserted into the fixing tool insertion recess P using the fixing tool insertion recess P of the upper beam A, and the two wooden beams A and B are fixed. Although an example was shown, when using this automatic fastener G1, it is not limited to such utilization, and it is possible from the first to fasten the wooden beams without the recessed part P. FIG.

  The automatic fastener G1 is a wedge member 6 having a substantially circular outer shape placed on the wooden beam A, and a support that supports the nut 2 disposed on the wedge member 6 and attached to one end of the bolt. FIG. 2 shows a planar structure of the support member 5 to which bolts and nuts are attached, and FIG. 3 excludes the bolts and nuts and the support member 5. The planar structure of the wedge member 6 is shown.

  Further, as shown in FIG. 1, coil springs (biasing members) are provided between the projecting portions 5a and 6a of the support member 5 and the wedge member 6 and on the outer peripheral surfaces of the core portions 5b and 6b of these members 5 and 6. 8) is wound. One end of the coil spring 8 is inserted into a bottomed hole (corresponding to a fixed portion) 6d drilled in the central portion 6b of the wedge member 6 and fixed so as not to be easily removed. The protrusions 5a of the support member 5 are disposed between the protrusions 5a of the support member 5 and are brought into contact with one side surface (corresponding to the support part) of the eight protrusions 5a. It is energized in one direction. That is, since the support member 5 or the wedge member 6 is always biased in the circumferential direction (in the case of this embodiment, the clockwise direction in this embodiment) by the coil spring 8, the wooden beams contract with each other over the years, and the bolts Even if a gap is formed between the nut and the nut, the wedge action is exhibited in the direction of eliminating the gap.

  The support member 5 is formed on the upper surface thereof, the washer 3 is inserted into a washer insertion recess 5e having a somewhat recessed portion, and the nut 2 is disposed and supported on the upper surface, and as described above, from the outer peripheral surface of the core portion 5b. Eight projecting portions 5a projecting at substantially equal intervals in the diameter expansion direction. Furthermore, on the lower surface of the core 5b, as shown in FIG. 1, an inclined surface (corresponding to a contact portion) inclined in one direction, which is substantially equally divided into three in the circumferential direction (open angle of about 120 °). 5c. FIG. 4 shows a development view of the support member 5 having the inclined surface 5c. In FIG. 4, the line CC represents a position where the line CC has been developed by 180 °. The inclined surface 5c is in contact with the inclined surface 6c formed on the upper surface of the core 6b of the wedge member 6, and is rotatable while sliding in the circumferential direction. Of course, the number of the protruding portions 5a of the support member 5 is not limited to eight, and other numbers may be formed.

  The inclined surface 5c of the support member 5 does not necessarily need to be divided. However, if the inclined surface 5c is evenly divided, the support member 5 and the wedge member 6 may be deformed due to shrinkage due to changes in the diameter of the wooden beams A and B. It is preferable that the load received by the sliding movement is evenly distributed and stable displacement occurs at any time when these members 5 and 6 slide. Of course, the inclined surface 5c may be divided into two parts. If the outer diameter is large, the number of parts may be further increased.

  As shown in FIG. 3, the wedge member 6 includes an inclined surface 6 c that is similarly divided into three in the circumferential direction so as to be in surface contact with the three inclined surfaces 5 c of the support member 5. The center portion has a bolt insertion hole 6e. Of course, a similar bolt insertion hole is also provided at the center of the support member 5. Reference numeral 10 indicates a temporary fixing for preventing the support member 5 and the wedge member 6 from rotating until the bolt and the nut are fastened so that the automatic fastener G1 is attached to the connection between the wooden beams. As shown in FIG. 2, a screw 9 is attached through a similar screw hole formed in the support member 5. Accordingly, the screw 9 shown in FIG. 1 is removed after the wooden beams A and B are fastened with the bolt 1 and the nut 2.

  In order to exhibit the wedge effect, the angle of the inclined surface 6b of the wedge member 6 needs to be 17 ° or less, preferably about 5 to 12 °, and the height of each inclined surface 6b of the wedge member 6 is about 5 mm. If it is more than the above, it can cope with the temporal change of the wood material for about 10 years. Note that the angle of the inclined surface 5b of the support member 5 is substantially the same because of the surface contact with the inclined surface 6b of the wedge member 6.

As described above, the support member 5 has a circumferentially inclined contact portion that engages with the inclined surface of the wedge member 6 and is slidable along the inclined surface, and the wedge member 6 extends in the circumferential direction. Since it has an inclined surface that is inclined and is slidably mounted on a wooden beam that is a member to be fastened, the sliding surfaces of the support member 5 and the wedge member 6 are always in contact with each other. There is no room for foreign matter such as dust to enter, and the sliding function is not impaired even for long-term arrangements. In addition, since the inclination angle of the wedge member (and the support member engaged therewith) is increased in the circumferential direction, the automatic fastener G1 is compact as a whole, and yet the wooden beams are connected to each other. Demonstrates the effect of reliably preventing gaps that may occur due to secular changes. Although not shown in the figure, the wedge member or the support member is prevented from further rotating and dropping from the maximum height after the wedge member slides and reaches the maximum height (the gap is maximum). A stopper mechanism for stopping the rotation may be provided.
Second Embodiment
The automatic fastener G2 of the second embodiment is configured to insert the leg of the bolt 1 shown in FIG. 1 into the bolt insertion hole 11 and fix and fasten the two beams with the bolt and the nut, and via the nut washer. The point inserted and mounted between the nut and one of the beams is the same as in the first embodiment.

  As shown in FIGS. 5 to 7, the automatic fastener G2 is slidably mounted on the beam, and has a wedge member 16 having a guide portion 16a and an inclined surface 16b, and the wedge. The member 16 has an inclined contact portion 15a slidable along the guide portion 16a on the inclined surface 16b, and engages with the support member 15 supporting the nut 2, the wedge member 16 and the support member 15, and the wedge. A coil spring (corresponding to a biasing member) 17 that constantly biases in a direction in which the wedge action of the member 16 proceeds and the wedge effect increases is configured.

  The guide portion 16a of the wedge member 16 has a predetermined width at the central portion in the width direction of the wedge member 16, and has a gradient substantially equal to the inclination of the inclined surface 16b on which the contact portion 15a of the support member 15 slides. In addition, an insertion hole (not shown) for inserting the bolt 1 is formed in the central portion in the width direction. The angle of the inclined surface 16b of the wedge member 16 is the same as that of the wedge member 6 described in the first embodiment. Further, locking projections 16 c for fixing one end side of the coil spring 17 are formed on both left and right side surfaces of one end portion of the wedge member 16. The locking projection 16c may be formed by inserting a threaded shaft longer than the width of the wedge member 16 into a shaft insertion hole formed in the width direction of one end of the wedge member 16. It is sufficient if both ends of the coil spring 17 can be supported.

  Further, a locking projection 15 c of the support member 15 that fixes the other end side of the coil spring 17 is provided on the other end side of the support member 15. This locking projection 15 c can also be provided in the same manner as the locking projection 16 c of the wedge member 16. Thus, one end side of the coil spring 17 is locked to the locking protrusion 16c of the chain member 16, and the other end side of the coil spring 17 is locked to the locking protrusion 15c of the support member 15, thereby The support member 15 is pulled and biased by the coil spring 17.

  The support member 15 includes a contact portion 15a having an inclined surface mounted on the inclined surface 16b of the wedge member 16 and guided by the guide portion 16a, and a bolt insertion hole (not shown) on the upper surface. Has been. The support member 15 slides on both side surfaces of the guide portion 16a of the wedge member 16 and the inclined surface 16b with which the contact portion 15a comes into contact.

  The two coil springs 17 provided on the left and right in the width direction preferably have substantially the same spring characteristics. As described above, one end 17a of the coil spring 17 is hooked and locked to the locking protrusion 16c of the wedge member 16, and the other end 17b is hooked and locked to the locking protrusion 15c of the support member 15. Therefore, when the two coil springs 17 provided on the left and right sides in the width direction have substantially the same spring characteristics, the chain member 16 and the support member 15 are pulled and biased substantially equally.

  When the automatic fastener G2 is used by using bolts and nuts for fastening and fixing the two beams, the chain member is placed at the position shown in FIG. 5 in advance against the tensile biasing force of the coil spring 17. 16 and the support member 15 are arranged, and in order to temporarily fix in this state, a screw (not shown) is inserted into the screw hole 14 and the chain member 16 and the support member 15 are fixed. When constructing at the site, the bolt is inserted into the bolt insertion hole 11 in this state, and the nut is tightened and firmly fixed. After that, when the temporary fixing screw is removed, the wedge member 16 is urged by the coil spring 17 to eliminate the gap formed between the bolt and the nut even if the beam shrinks due to aging. In addition, since a gap that may be generated between the bolt and the nut is prevented, no gap is generated between the bolt and the nut.

  As shown in FIG. 6, the length of the support member 15 is somewhat shorter than the length of the wedge member 16, but both may be the same length. In that case, dust or the like hardly adheres to the inclined surface 16b of the wedge member 16, which is preferable. The coil spring 17 may be covered with a cover member that covers the coil spring 17. This is convenient because dust or the like hardly accumulates on the coil spring 17.

  The support member 15 is composed of an upper surface member 15b and a lower surface member 15d. However, these may be integrated as shown in FIGS.

  That is, FIGS. 8 and 9 show an automatic fastening tool G <b> 2 ′ for fixing two wooden beams A and B placed on the legged washer 20 with the bolt 1 and the nut 2.

  The automatic fastener G2 ′ has a wedge member 26 having two inclined surfaces 26a on the left and right sides in the width direction, and a contact surface 25a that is placed on the wedge member 26 and slides on the inclined surface 26a. The support member 25 that supports one end of the combination of the bolt 1 and the nut 2, the wedge member 26, and the support member 25 are engaged, and the wedge action of the wedge member 26 progresses so that the wedge effect is constantly urged. And a coil spring 27.

  The function of the automatic fastening tool G2 'is substantially the same as that of the automatic fastening tool G2 shown in the second embodiment, but the number of parts is small and it can be manufactured at a lower cost. Reference numeral 22 is a long hole provided for sliding the wedge member 26, and reference numeral 23 is a shaft that engages with an end recess of the wedge member 26 that engages one end of the coil spring 27. The reference numeral 24 is a shaft that engages with an end recess of the support member 25 that locks the other end of the coil spring 27.

<Third Embodiment>
In the automatic fastener G3 of the third embodiment, a bolt leg is inserted into a bolt insertion hole, two beams are fixed and fastened with a bolt and a nut, and the nut and one beam are connected to each other via a nut washer. The point inserted and mounted between the first and second embodiments is the same as in the first and second embodiments. Hereinafter, the automatic fastener G3 of 3rd Embodiment is demonstrated with reference to FIGS.

  The automatic fastener G3 is sandwiched between the upper and lower support members 35 and 37 and the upper and lower support members 35 and 37, and is movable in a sliding direction (left and right with respect to the paper surface in FIGS. 10 to 15). Two wedge members 36 divided into left and right and four coil springs 38 as urging members wound around coil spring support pillars 37 a formed at four corners of the lower support member 37.

  For example, as shown in FIG. 14, the lower support member 37 is placed and fixed on the legged washer 20. The lower support member 37 has a bolt insertion hole 31 in the center and a bolt insertion. Guide grooves 37b in which the wedge member 36 is slidably movable are formed on the left and right sides of the hole 31. The guide groove 37b has a groove-like recess extending from the center of the ends on both short sides to the longitudinal direction (same as the sliding direction), and from the end on the short side to the bolt as shown in FIG. An inclination angle gradually increases toward the insertion hole 31. The inclination angle together with the inclined surface of the upper support member 35 is 17 ° or less. Therefore, the inclination angle of the guide groove 37b is 17/2 ° or less. However, as described in the first and second embodiments, the inclination angle is more preferably 5 to 12 °, and therefore the inclination angle of the guide groove 37b is more preferably 5/2 to 12/2 °.

  As shown in FIG. 12, the upper support member 35 has a bolt insertion hole 35a in the center, and has four corners cut away so that the coil spring 38 wound around the coil spring support column 37a can be seen. As shown in FIG. 14, the back surface side of the upper support member 35 has an inclined surface so that the inclination angle increases from the short side end portion toward the center portion so as to face the front surface side of the lower support member 37. Have. Thus, as the wedge member 36 sandwiched between the upper and lower support members moves from the end side of the upper and lower support members toward the central portion together with the lower support member 37, 4 The wedge spring effect can be exerted by being biased by the coil spring 38 at the location. The reference numeral 35b is a guide groove on which the wedge member 36 slides, and, like the guide groove 37b formed on the lower support member 37, the longitudinal direction from the center of the ends on both short sides (the same as the sliding direction). ) Having a groove-like recess.

  As shown in FIG. 13, the coil spring 38 is wound around a coil spring support column 37a, and its one end 38a is hooked on a notch 37c in the vicinity of the coil spring support column 37a formed at the four corners of the lower support member 37. The other end portion 38b is engaged with the rear portion of the wedge member 36, and the nut of the fixing tool for fixing and fastening the automatic fastening tool G3 to the beams A and B and one of the beams. When inserted and mounted between them, the wedge member 36 is always urged. However, before the automatic fastening tool G3 is mounted (before fastening with the fixing tool), the upper and lower portion support members 35 and 37 and the coil spring 38 are temporarily fixed, so that they are the same as in the first and second embodiments. A temporary fixing screw (not shown) is used. Reference numeral 39 denotes a screw hole through which the temporary fixing screw is inserted.

  As shown by a broken line in FIG. 13, the wedge member 36 is formed in a semicircular arc shape in a plan view so that its inner side is along the outer periphery of the bolt inserted through the bolt insertion hole, and the whole is substantially C-shaped. The upper and lower support members 35 and 37 are slidable from the left and right from the substantially central portion on the short side toward the bolt insertion hole. Accordingly, the upper and lower central portions of the wedge member 36 are formed in a somewhat protruding shape so as to fit into the guide groove 37b of the lower support member having a groove-like recess and the guide groove 35b of the upper support member, It has a wedge shape so that the thickness decreases from the outer peripheral surface side toward the inner side. The outer peripheral side of the wedge member 36 is in contact with the other end side of the coil spring 38 wound around the coil spring support column 37a.

  When the automatic fastener G3 is used for fixing and fastening the beams A and B, the bolts and nuts are fastened, and the temporary fixing screws are removed, the outer peripheral side of the wedge member 36 is always urged by the coil spring 38. Will come to be. In this case, the outer peripheral side of the wedge member 36 is biased substantially evenly by the two coil springs 38 wound around the coil spring support columns 37a at the two corners, so that the wedge member 36 can be stably slidably moved. become. FIG. 15 shows a state where the wedge member 36 biased by the two coil springs 38 has moved to the final position. In that case, the upper support member 35 is pushed upward by the height h. Here, a protruding portion that is formed at the upper and lower central portion of the wedge member 36 and fits into the guide grooves 35b and 37b of the upper and lower support members corresponds to the guide portion, and the left and right portions of the guide portion correspond to the inclined surface. Further, the peripheral portions of the guide grooves 35b and 37b formed in the upper and lower support members 35 and 37 are engaged with the guide portions of the wedge member 36 and are slidable along the inclined surface of the wedge member 36. It corresponds to the part.

As described above, the automatic fastener G3 of the present embodiment is configured so that the wedge member 36 that slides in the longitudinal direction is biased so as to collectively move from the left and right in the longitudinal direction toward the central portion. The member can be slid evenly from side to side, resulting in stable displacement. Not only that, even if the bolts or nuts are provided with anti-rotation treatment, there will be no problem and the generation of the gap can be reliably prevented.
[Another embodiment]
(1) In the above-described embodiment, the connection between the wooden beams is described as an example of the fastened member. However, the wood material does not have to be used as long as it is subject to change over time, and the wooden material is used as one member. The present invention can also be applied to the case where the other member is connected using a material other than a wood material, and the connection is also made between metal materials that cause distortion or deflection.
(2) Although the example applied to the combination of a bolt and a nut was shown in the said embodiment, it is not limited to this, A wing board bolt, an anchor bolt, a double pulling bolt, a knob bolt, a waist high wing board bolt, a coach screw bolt It can be applied to a fixing tool such as various bolts and various nuts, and the material of the fixing tool can be applied not only to a metal but also to a resin fixing tool.

Sectional drawing explaining mounting | wearing of the automatic fastener G1 which concerns on 1st Embodiment of this invention. FIG. 1 is a plan view of an upper member into which nuts and bolts constituting the automatic fastener shown in FIG. 1 are inserted. FIG. 1 is a plan view of a lower member (with nuts and bolts removed) constituting the automatic fastener of FIG. Development view of a support member having an inclined surface The top view of automatic fastener G2 concerning a 2nd embodiment of the present invention. The front view which shows the state which removed the biasing member of the automatic fastener G2 of FIG. The right view which shows the state which mounted | wore the biasing member of the automatic fastener of FIG. A top view showing modification G2 'of an automatic fastener concerning a 2nd embodiment. The front view which shows the attachment state of the automatic fastener of FIG. The top view which shows the lower support member which comprises the automatic fastener which concerns on 3rd Embodiment. The front view which shows the lower supporting member of FIG. The top view which shows the upper support member which comprises the automatic fastener which concerns on 3rd Embodiment. The top view which shows the automatic fastener G3 which concerns on 3rd Embodiment. The front view which shows the automatic fastener of FIG. Front view similar to FIG. 14 showing a state in which the wedge member is moved by being urged by the urging member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 Fastener 5 Support member 5c Contact part 6 Wedge member 6c Inclined surface 6d Fixing part 8 and 17 Energizing member 15 Support member 15a Contact part 16 Wedge member 16a Guide part 16b Inclined surface 27 and 38 Energizing member 35 Upper support Member 36 Wedge member 37 Lower support member A, B Fastened member

Claims (6)

By mounting between the fastening member and one end side of the fastening tool that fastens and fastens the fastened members together, the gap between the fastening tool and the fastened member is automatically prevented from being generated due to a change over time. An automatic fastening tool for correcting to
A wedge member having an inclined surface inclined in the circumferential direction and slidably mounted on the fastened member;
A support member having a contact portion that is inclined in the circumferential direction and supports one end side of the fixing tool, and is slidable along the inclined surface by engaging with the inclined surface of the wedge member;
Circumferential wedge action of the wedge member engages the said wedge member and the support member is advanced, and urges that constantly urges the support member in the clockwise direction as viewed from one end of the fastener An automatic fastener having a member.   2. The automatic fastener according to claim 1, wherein the inclined surface of the wedge member is substantially equally divided into a plurality in the circumferential direction, and an inclination angle of each of the divided contact surfaces is 5 to 12 °.   2. The biasing member is a coil spring, the wedge member has a support portion that supports and fixes one end of the coil spring, and the support member has a fixing portion that fixes the other end of the coil spring. Or the automatic fastener of 2 description.   The coil spring is wound around the outer peripheral surfaces of the wedge member and the support member between the protruding portions that protrude from the outer peripheral surface of the wedge member and the support member. Item 3. The automatic fastener according to item 3.   The automatic fastener according to any one of claims 1 to 4, wherein the wedge member or the support member is provided with a stopper mechanism that stops sliding movement of the wedge member.   Prior to tightening and fixing by the fixing tool, the wedge member and the support member are urged by the urging member, and a temporary fixing screw hole for mounting a temporary fixing screw for preventing rotation is provided on the wedge. The automatic fastener according to any one of claims 1 to 5, wherein the automatic fastener is formed on each of the member and the support member.

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