JP4531585B2 - nut - Google Patents

Description

  The present invention relates to a nut provided with a nut segment that is screwed with a threaded portion of a bolt by being rotated after being inserted into the bolt.

  A conventional nut of this type has a nut body having an outer wall formed in a polygonal shape, and an inner wall having an inclined hole that gradually becomes smaller in diameter, and a stopper having a bolt insertion hole formed at an end portion on the large diameter side of the nut body. And at least three guide pieces formed in the axial direction of the inner wall surface of the nut body, and bolts and screws on the inner wall surface slidably mounted between these guide pieces in the axial direction. And at least three nut segments formed with a thread to be joined, and the at least three nut segments fixed to the end portion on the small diameter side of the nut body are prevented from coming off and the nuts A flange-shaped mounting piece projecting outward from the outer peripheral portion of the main body and the nut book so as to constantly urge the at least three nut segments toward the small diameter side of the nut main body. It is composed of a biasing spring housed within.

By inserting the nut configured in this way into the bolt and rotating it in the tightening direction, the three nut segments are screwed into the threaded portion of the bolt, but there is always clearness for one thread, There was a drawback of not.
JP-A-11-72110

  In view of the above-described conventional drawbacks, the present invention is inserted into a bolt and rotated in the tightening direction, so that at least three nut segments are screwed into the screw portion of the bolt and the nut segment is accommodated. It is an object of the present invention to provide a nut capable of constantly urging the nut body in the screwing direction to eliminate the play of the nut segment and maintaining a reliable screwed state.

The above and other objects and novel features of the present invention will become more fully apparent when the following description is read in conjunction with the accompanying drawings.
However, the drawings are for explanation only and do not limit the technical scope of the present invention.

  To achieve the above object, according to the present invention, when a bolt is inserted and then rotated in a screwing direction, at least three nut segments that are screwed with a screw portion of the inserted bolt and the nut segment are urged. A nut body in which a nut segment urging spring is housed, a spring case attached to an outer peripheral portion excluding the upper part of the nut body so that an upper end portion is rotated integrally with the nut body, and a lower part of the spring case A washer that is rotatably attached to the spring case, one end housed in the spring case is screwed into the spring case or the nut body, and the other end is screwed into the washer when the nut body is screwed into the bolt. The nut is composed of a nut body biasing spring attached so as to be biased.

  As is clear from the above description, the present invention has the following effects.

(1) After inserting the bolt, the nut segment energizing spring for energizing the nut segment and at least three or more nut segments that are engaged with the threaded portion of the inserted bolt when rotated in the screwing direction are housed. A nut case, a spring case attached to the outer peripheral portion excluding the upper portion of the nut body so that the upper end of the nut body rotates together with the nut body, and a washer rotatably attached to the lower part of the spring case And one end housed in the spring case is attached to the spring case or the nut body, and the other end is attached so that the nut body can be always urged in the screwing direction when the nut body is screwed onto the washer. Since it is composed of a nut body biasing spring, it is automatically inserted into the bolt by the nut body biasing spring and tightening direction By screwing, it is possible to at least three nut segments to the screw portion of the bolt with threaded biases the nut body in the tightening direction of the nut segments screwed all times.
Therefore, it is possible to solve the problem of clearing or not having one screw thread as in the prior art, to maintain a reliable screwed state, and to reliably prevent the nut from loosening. it can.

(2) Since it is attached to the nut body according to (1), it is easy to handle and can be used in the same manner as a conventional nut.

(3) According to the above (1), it is only necessary to add a spring case and a nut main body biasing spring, and it can be easily manufactured.

  Hereinafter, the present invention will be described in detail with reference to the best mode for carrying out the invention shown in the drawings.

  In the best mode for carrying out the present invention shown in FIGS. 1 to 12, reference numeral 1 denotes a nut according to the present invention. The nut 1 is inserted when it is rotated in the screwing direction after the bolt 2 is inserted. A nut body 6 in which at least three or more nut segments 4, 4, 4 screwed with the threaded portion 3 of the bolt 2 and a nut segment biasing spring 5 biasing the nut segments 4, 4, 4 are housed; The spring case 7 is attached to the outer peripheral portion of the nut body 6 except for the upper part so that the upper end of the nut body 6 rotates together with the nut body 6, and the washer is rotatably attached to the lower part of the spring case 7. 8 and one end housed in the spring case 7 is screwed into the spring case 7 or the nut body 6, and the other end is screwed into the washer 8 when the nut body 6 is screwed into the bolt 2. It is composed of a spiral spring or a coil spring-like nut body biasing spring 9 mounted so as to be always biased in direction.

  The nut body 6 has a polygonal outer wall 10 as shown in FIGS. 1 to 7, a hexagonal shape in the embodiment of the present invention, and a nut case 13 having an inclined hole 12 that sequentially becomes smaller in diameter on the inner wall 11; A stopper piece 15 having a bolt insertion hole 14 that is caulked and fixed to the end portion of the nut case 13 on the large diameter side, and at least three or more formed in the axial direction of the inner wall 11 of the nut case 13. In the embodiment to be implemented, three guide pieces 16, 16, 16 and a thread that is screwed to the bolt 2 on the inner wall 11 that is slidably mounted in the axial direction between the guide pieces 16, 16, 16. 17, three nut segments 4, 4, 4 formed on the small diameter side of the nut case 13, and a nut segment removal prevention piece 18 integrally formed on the small diameter side of the nut case 13. The spring case insertion portion 19 of the spring case 7 and the three nut segments 4, 4, 4 formed on the outer peripheral portion on the side are always attached in the direction of the nut segment removal prevention piece 18 direction of the nut case 13. The nut segment biasing spring 5 is housed in the nut case 13 so as to be biased.

  As shown in FIG. 8, the spring case 7 has an upper surface plate 21 in which a hexagonal insertion hole 20 into which the spring case insertion portion 19 of the nut case 13 is inserted in a non-rotatable manner is formed at the center of the upper surface. The lower part integrally formed so that it may protrude below the outer peripheral part of the upper surface board 21 is formed with the outer peripheral wall 23 which has the flange 22 which protrudes outward.

  As shown in FIG. 9, the washer 8 is formed on the washer body 25 covering the lower opening 7 a of the spring case 7 in which the bolt insertion hole 24 is formed in the center, and the outer periphery of the washer body 25. A plurality of engaging pieces 26, 26, 26 that are engaged with the flange portion 22 of the spring case 7 and that are rotatably attached to the washer body 25 are configured.

  As shown in FIG. 10, the nut body urging spring 9 is configured such that the nut body 6 can be rotated in the tightening direction by inserting the nut body 6 into the bolt 2 and rotating the nut body 6 in the tightening direction. One end of the spring case 7 is fixed to a fixing pin 27 fixed to the spring case 7 so that an urging force can be applied, and the other end wound about twice is fixed to the fixing pin 28 fixed to the washer 8. It is fixed to have play between.

As shown in FIG. 11, the nut 1 having the above-described configuration is inserted into a bolt 2 attached to a portion where the timbers 29 and 29 are fixed, and is brought into contact with the timber 29. At this time, the nut segments 4, 4, 4 slide against the large diameter side of the inclined hole 12 against the urging force of the nut segment urging spring 5, thereby allowing the bolt 2 to enter.
Next, by rotating the nut case 13 of the nut body 6 in the tightening direction using a spanner or the like, as shown in FIG. 12, the threads 17 and 17 of the threaded portion 3 of the bolt 2 and the nut segments 4, 4, and 4. , 17 are screwed together to fasten and fix the timbers 29, 29, and a biasing force is applied to the nut body biasing spring 9.
For this reason, the urging force of the nut body urging spring 9 urges the nut body 6 to always rotate in the tightening direction, eliminates play of the nut segments 4, 4, 4, and ensures a secure screwed state. Can keep.
[Different forms for carrying out the invention]

  Next, different modes for carrying out the present invention shown in FIGS. 13 to 33 and nuts considered by the present inventor will be described. In the description of these different modes for carrying out the present invention and the nut considered by the present inventor, the same components as those in the best mode for carrying out the present invention are designated by the same reference numerals. A duplicate description will be omitted.

  The second embodiment for carrying out the present invention shown in FIGS. 13 to 15 is mainly different from the best first embodiment for carrying out the present invention in that an outer peripheral portion is formed on the inner bottom surface of the upper surface plate 21. In the embodiment of the present invention, a nut case 13A having two ratchet-like locking portions 30, 30 is used in the embodiment of the present invention, and one end of the nut body biasing spring 9 is rotated when the nut body 6 is rotated in the tightening direction. The part rotates without locking with the locking parts 30, 30, and is locked with the locking parts 30, 30 by reverse rotation after tightening and fixing, and gives a biasing force to the nut body biasing spring 9, The first embodiment for implementing the present invention is the same as the nut 1A configured as described above in that the urging force can be applied to the nut body 6 by rotating in the tightening direction. The same effect can be obtained

  The third embodiment for carrying out the present invention shown in FIGS. 16 to 18 is mainly different from the second embodiment for carrying out the present invention in that locking portions 30 and 30 are formed. The spring case 7A comprising the face plate 21 and the outer peripheral wall 31 integrally formed on the outer peripheral portion of the washer 8 is used, and the outer peripheral wall 31 of the spring case 7A and the upper surface plate 21 are rotatably attached. Even with the nut 1B configured as described above, the same effects as those of the second embodiment for carrying out the present invention can be obtained.

  19 to 21, the nut considered by the present inventor is mainly different from the best first embodiment for carrying out the present invention in that a spring is rotatably provided at a portion near the lower portion of the nut case 13B. While attaching the case 7B, the washer 8 is fixedly attached to the lower part of the spring case 7B, one end of the nut main body biasing spring 9 is fixed to the nut segment removal preventing piece 18 with a pin 27, and the other end is fixed. The nut 1C configured in this way may be used in that it is fixed to the washer 8 or the spring case 7B with a pin 28.

  22 to 24, the nut considered by the present inventor is mainly different from the second embodiment for carrying out the present invention in that the spring case 7B is rotatable to a portion near the lower portion of the nut case 13B. At the same time, the nut case 13B is secured to the lower end of the nut case 13B by fixing the nut segment removal prevention piece 18 and the locking portions 30 and 30 to the mounting portion 32. The nut 1 </ b> D configured in this way may be used in that the one end of the main body biasing spring 9 is configured to be locked.

  The fourth embodiment for carrying out the present invention shown in FIGS. 25 to 27 is mainly different from the second embodiment for carrying out the present invention in that at least one or more of the wood 29 bites into the bottom surface when tightening. The washer 8A in which the biting piece 33 or the screw insertion hole 34 is formed, and the locking portions 30 and 30 are formed on the upper surface of the washer 8A. One end of the nut body biasing spring 9 is fixed to the nut case 13A with the fixing pin 27 In the second embodiment for carrying out the present invention, the nut 1E configured as described above can be fixed to the other end and locked to the locking portions 30 and 30 of the washer 8A. The same effect can be obtained.

  The fifth embodiment for carrying out the present invention shown in FIGS. 28 to 30 is mainly different from the third embodiment for carrying out the present invention in the inner wall surface of the outer peripheral wall 31 of the spring case 7A. A large number of ratchet-shaped locking portions 30A are formed, one end of the nut body biasing spring 9 is fixed to the top plate 21 or the nut case 13 with a fixing pin 27, and the other end is connected to the locking portion 30A. Even with the nut 1F configured as described above, the same effect as that of the third embodiment for carrying out the present invention can be obtained in that it is attached so as to be locked.

  The nut considered by the present inventor shown in FIGS. 31 to 33 is mainly different from the fifth embodiment for carrying out the present invention in that a plurality of engagements are provided on the bottom surface of the nut case 13B. A spring support plate 35 in which a stop 30 is formed is fixedly attached, and a washer in which at least one biting piece 33 or a screw insertion hole 34 is formed into which the wood 29 bites into the bottom end of the nut case 13B when tightened to the bottom surface. 8A is rotatably mounted, and one end portion of the nut main body biasing spring 9 located between the spring support plate 35 and the washer 8A is locked to the locking portion 30 of the spring support plate 35, and the other end portion May be the nut 1G configured in this way in that it is attached to the washer 8A.

  The present invention is utilized in the industry of manufacturing nuts.

The top view of the best 1st form for implementing this invention. 1 is a front view of the best first embodiment for carrying out the present invention. The bottom view of the best 1st form for implementing this invention. Sectional drawing in alignment with line 4-4 in FIG. Sectional drawing which follows the 5-5 line of FIG. The top view of the nut main body of the best 1st form for implementing this invention. Sectional drawing in alignment with line 7-7 in FIG. Explanatory drawing of the spring case of the best 1st form for implementing this invention. Explanatory drawing of the washer of the best 1st form for implementing this invention. Sectional drawing which follows the 10-10 line of FIG. Explanatory drawing of the use condition of the best 1st form for implementing this invention. Explanatory drawing of the fastening state of the best 1st form for implementing this invention. The top view of the 2nd form for carrying out the present invention. Sectional drawing which follows the 14-14 line | wire of FIG. Explanatory drawing of the principal part of the 2nd form for implementing this invention. The top view of the 3rd form for carrying out the present invention. FIG. 17 is a sectional view taken along line 17-17 in FIG. 16; Explanatory drawing of the principal part of the 3rd form for implementing this invention. The top view of the nut which this inventor considered. Sectional drawing which follows the 20-20 line of FIG. Explanatory drawing of the principal part of the nut which this inventor considered. The top view of the nut which this inventor considered. FIG. 23 is a sectional view taken along line 23-23 in FIG. 22; Explanatory drawing of the principal part of the nut which this inventor considered. The top view of the 4th form for carrying out the present invention. FIG. 26 is a sectional view taken along line 26-26 in FIG. 25; Explanatory drawing of the principal part of the 4th form for implementing this invention. The top view of the 5th form for implementing this invention. FIG. 29 is a sectional view taken along line 29-29 in FIG. 28; Explanatory drawing of the principal part of the 5th form for implementing this invention. The top view of the nut which this inventor considered. FIG. 32 is a cross-sectional view taken along line 32-32 in FIG. 31. Explanatory drawing of the principal part of the nut which this inventor considered.

1, 1A, 1B, 1C, 1D, 1E, 1F, 1G: nut,
2: Bolt, 3: Threaded part,
4: Nut segment,
5: Nut segment biasing spring,
6: nut body 7, 7A, 7B: spring case,
8, 8A: Washer, 9: Nut body biasing spring,
10: outer wall, 11: inner wall,
12: inclined hole, 13, 13A, 13B: nut case,
14: Bolt insertion hole, 15: Stopper piece,
16: Guide piece, 17: Screw thread,
18: Nut segment slip-off prevention piece,
19: Spring case insertion part, 20: Insertion hole,
21: top plate, 22: flange,
23: outer peripheral wall, 24: bolt insertion hole,
25: Washer body, 26: Engagement piece,
27: fixing pin, 28: fixing pin,
29: Wood, 30, 30A: Locking part,
31: outer peripheral wall, 32: mounting piece,
33: Biting piece 34: Screw insertion hole,
35: Spring support plate.

Claims (1)

A nut body in which at least three nut segments that are screwed with the threaded portion of the inserted bolt when rotated in the screwing direction after the bolt is inserted, and a nut segment biasing spring that biases the nut segment are housed A spring case attached to an outer peripheral portion excluding the upper portion of the nut body so that an upper end thereof is rotated integrally with the nut body, a washer rotatably attached to a lower portion of the spring case, One end housed in the spring case is attached to the spring case or nut body, and the other end is attached to the nut body so that the nut body can be always biased in the screwing direction when the nut body is screwed onto the washer. A nut characterized by comprising a spring.

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