JP6094002B2 - Wing nut locking device - Google Patents

Description

  The present invention relates to a wing nut locking prevention device that prevents the wing nut attached to a bolt from loosening or coming off.

  Conventionally, as a means for preventing the loosening of the nut, a coil spring that matches the pitch of the male thread groove of the bolt is accommodated in the spring accommodating recess of the nut as in Patent Document 1, and the bolt when the bolt and the nut are screwed is applied to the bolt. A coil spring comes into close contact with the male thread groove of the bolt as the nut moves away from the bolt, increasing the frictional force to prevent the rotation, and once the nut is fastened to the bolt, the fastening cannot be easily removed. There is something.

Japanese Utility Model Publication No. 50-135866

  As a problem to be solved, in the case of Patent Document 1, a recess that houses a coil spring that is in close contact with a male screw groove of a bolt or a mounting hole that fits and holds the tip of a bent support portion of the coil spring is provided in the nut. Therefore, these processes are necessary for the nut, and there is a problem that assembly of the coil spring takes time and effort.

  The present invention has been made in view of the above, and reliably prevents the wing nut from loosening due to the bolt being simply screwed into the coil spring and the vibration or external force acting on it for a long period of time. An object of the present invention is to provide a wing nut locking device that can be manufactured easily and is easy to manufacture.

  In order to solve the above-described problems and achieve the object, the present invention is configured as follows.

The invention according to claim 1 is a wing nut body attached to a bolt, the wing nut body comprising a concave body having a screw hole in the center and wings protruding on both sides thereof, A female screw groove into which the male screw of the bolt is screwed is formed in the screw hole, the starting point of processing of the female screw groove is matched with the position of one of the wing parts, and the bolt is placed in the concave body part. A coil spring comprising a coil portion having a coil pitch that matches the pitch of the male screw is disposed, and one end portion of the coil spring is inserted into a through groove formed in the wing portion that matches the starting point to form a fixed end. In addition, the other end of the coil spring protrudes outward from the periphery of the body portion to be a free end ,
The one end portion of the coil spring is bent toward the other end side in parallel with the axial direction of the coil portion at a position outward from the outer periphery of the coil portion, and this coincides with the starting point of the female screw groove. 2. The wing nut locking device according to claim 1, wherein the wing nut is inserted into the through groove of the wing portion, and the tip of the one end portion is bent to be engaged with a protrusion formed in the through groove. It is.

According to a second aspect of the present invention, an opening for projecting the other end portion of the coil spring outward from the peripheral edge of the trunk portion is provided at the peripheral edge of the trunk portion positioned in the immediate vicinity of the base of the wing portion. The wing nut locking device according to claim 1.

  With the above configuration, the present invention has the following effects.

The invention according to claim 1 is a wing nut body attached to a bolt, the wing nut body comprising a concave body portion having a screw hole in the center and wing portions projecting on both sides thereof, A female screw groove into which the male screw of the bolt is screwed is formed in the screw hole, the starting point of processing of the female screw groove is matched with the position of one of the wing parts, and the bolt is placed in the concave body part. A coil spring comprising a coil portion having a coil pitch that matches the pitch of the male screw is disposed, and one end portion of the coil spring is inserted into a through groove formed in the wing portion that matches the starting point to form a fixed end. In addition, since the other end portion of the coil spring protrudes outward from the periphery of the body portion to be a free end, it is possible to reliably prevent loosening of the wing nut body, which is caused by transmission of vibrations of the bolt, and the like. Said female of wing nut body Easily see the starting point of screw cutting start to form the di-hole can be easily aligned coil pitch of the coil spring to the pitch of the male thread. Further, the one end portion of the coil spring is bent toward the other end side in parallel with the axial direction of the coil portion at a position outward from the outer periphery of the coil portion, and this is bent with the starting point of the female screw groove. Since it is inserted into the through-groove of the matching wing, and the tip of the one end is bent and locked to a protrusion formed in the through-groove, the one end of the coil spring is inserted into the through-groove of the wing. By inserting the portion, it can be easily assembled so that the pitch of the female screw groove and the coil pitch of the coil portion are continuous, and the coil spring moves in the screwing direction of the bolt. I can stop.

According to a second aspect of the present invention, an opening for projecting the other end portion of the coil spring outward from the periphery of the body portion is provided at the periphery of the body portion that is positioned in the immediate vicinity of the base of the wing portion. Therefore, the opening does not reduce the strength of the wing nut body, and the one end portion of the coil spring is close to the wing portion, so that the one end portion and the wing portion can be easily joined together. It can be picked and the bolt can be easily detached.

The side view which carried out the cross section of a part of wing nut locking device in this invention. The top view of the locking device of a wing nut in this invention. Sectional drawing which shows the rotation state to the loosening direction of the wing nut in this invention. The top view of the wing nut in this invention.

Embodiments of the wing nut locking device according to the present invention will be described below.
The embodiment of the present invention shows the most preferable mode of the present invention, and the present invention is not limited to this.

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an example of implementing a wing nut locking device. Reference numeral 1 denotes a wing nut body made of synthetic resin.

  The wing nut body 1 includes a concave body portion 2 having a screw hole 3 in the center and wing portions 4 integrally formed on the left and right sides thereof, and is screwed into a bolt 6 inserted into a non-fastening member W.

  A female screw groove 3a into which the male screw 6a of the bolt 6 is screwed is formed in the screw hole 3, and the starting point 3b of the screw groove 3a is shown in FIG. Match either one.

  A coil spring 7 is arranged in the concave body portion 2, and the coil spring 7 has a coil portion 7 a having a coil pitch matching the pitch of the male screw 6 a of the bolt 6, and one end portion extending from the coil portion 7 a. 7b and the other end 7c.

  The one end portion 7b is bent outside the outer periphery of the coil portion 7a in parallel with the coil portion axial direction, and the other end portion 7c extends outward from the outer periphery of the coil portion 7a.

  The one end portion 7b is inserted into a through groove 5 drilled in the wing portion 4 that coincides with the starting point 3b to be a fixed end, and the one end portion 7b of the coil spring 7 inserted into the through groove 5 Bend the tip.

  When the one end portion 7 b of the coil spring 7 is inserted into the through groove 5, the bending of the tip end of the one end portion 7 b is further deformed to pass through the inlet of the through groove 5. Thereafter, the bending deformation of the one end portion 7 b returns to the original state, and the bending of the one end portion 7 b is locked to the protrusion 5 a formed in the through groove 5.

  The other end portion 7c of the coil spring 7 protrudes in a non-contact state outwardly from an opening 2b provided in the peripheral edge 2a of the trunk portion 2 located immediately below the base of the wing portion 4, and the wing portion 4 It extends to the vicinity of and makes the tip a free end. If the other end portion 7c of the coil spring 7 is projected in a non-contact state, the vibration of the wing nut body 1 is not directly transmitted to the coil spring 7.

The wing nut body 1 is screwed in such a manner that the coil spring 7 is positioned on the opposite side to the fastened object W with respect to the bolt 6 inserted through the fastened object W.
At this time, by picking together the other end portion 7c of the coil spring 7 and the wing portion 4 with a finger, the coil portion 7a of the coil spring 7 spreads outward with the one end portion 7b as a fulcrum. 3, the wire of the coil spring 7 fitted into the valley of the male screw 6 a of the bolt 6 is brought into a non-contact state, the frictional force is reduced, and the wing nut body 1 is connected to the male screw 6. It is smoothly screwed into the screw 6a.

  When the other end portion 7c of the coil spring 7 and the wing portion 4 are removed, the wing nut body is pressed against the axial center of the bolt 6 by the elastic force of the wire of the coil spring 7. As shown in FIG. 1, the coil portion 7 a of the coil spring 7 screwed together with 1 is fitted into the valley of the male screw 6 a of the bolt 6. In addition, since the bending of the tip of the one end portion 7b of the coil spring 7 is locked to the protrusion 5a, the coil spring 7 does not move in the screwing direction of the bolt 6.

  Further, since the axial length of the coil portion 7a is longer than the axial length of the female thread groove 3a of the wing nut body 1, the coil portion 7a and the butterfly of the coil spring 7 in the long axial direction are arranged. The female thread groove 3a of the nut body 1 is integrated by screwing the bolt 6 to the male thread 6a, and the wing nut body 1 does not rattle when fastened.

  Even if the wing nut body 1 is rotated in the nut disengagement direction with respect to the male screw 6 a of the bolt 6, the one end portion 7 b of the coil spring 7 is inserted into the through groove 5 of the wing portion 4. Therefore, the element wire of the coil spring 7 is pulled so as to be contracted in the inner diameter direction, the male screw 6a of the bolt 6 is tightened, and a strong loosening prevention state is obtained. For this reason, the wing nut body 1 integrated with the coil spring 7 is prevented from rotating by the coil portion 7a of the coil spring 7 and is not loosened.

  When the wing nut body 1 is removed, if the other end portion 7c and the wing portion 4 are picked together with fingers, the coil portion 7a of the coil spring 7 spreads outward, as shown in FIG. In addition, since the friction between the valley of the male screw 6a of the bolt 6 and the coil portion 7a is released and friction is eliminated or reduced, the rotation of the bolt 6 is allowed. The wing nut body 1 can be easily rotated and detached from the bolt 6 while protecting the male screw 6a.

  In the press wing nut locking device having the above-described configuration, the starting point 3b for starting the processing of the female screw groove 3a formed in the screw hole 3 of the wing nut body 1 is provided on the wing portion 4 of the wing nut body 1. The coil spring 7 is inserted into the wing nut body 1 by inserting the one end portion 7b of the coil spring 7 in close contact with the male screw 6a of the bolt with the wing portion 4 of the wing nut body 1. Assembling can be facilitated, and the wing nut body 1 can be securely prevented from loosening with respect to the bolt 6.

  Further, by bending the tip of the one end portion 7b of the coil spring 7 and engaging the projection 5a formed in the through groove 5, the coil spring 7 is prevented from moving in the screwing direction of the bolt 6. it can. If the bending of the one end portion 7 b of the coil spring 7 is further deformed, the one end portion 7 b of the coil spring 7 can be easily inserted into the through groove 5.

  Further, an opening 2b for projecting the other end portion 7c of the coil spring 7 outward from the peripheral edge 2a of the trunk portion 2 is provided in the peripheral edge 2a of the trunk portion 2 located immediately below the base of the wing portion 4. As a result, the strength of the wing nut body 1 is not reduced by the opening 2b, and the other end portion 7c of the coil spring 7 is close to the wing portion 4. The wing part 4 can be easily picked and the bolt 6 can be easily detached.

  The present invention is a press wing nut locking device that can be easily manufactured with a structure that can easily prevent the wing nut mounted on the bolt from being loosened by vibration or the like.

DESCRIPTION OF SYMBOLS 1 Wing nut body 2 Body part 2a Perimeter 2b Opening 3 Screw hole 3a Female thread groove 3b Starting point of processing 4 Wing part 5 Through groove 5a Protrusion 6 Bolt 6a Male screw 7 Coil spring 7a Coil part 7b One end part (fixed end)
7c The other end (free end)
W Fastened member

Claims (2)

A wing nut body attached to a bolt, the wing nut body comprising a concave body having a screw hole in the center and wings protruding on both sides thereof, and the male screw of the bolt is inserted into the screw hole. An internal thread groove to be screwed is formed, the starting point of processing of the internal thread groove is matched with the position of one of the wings, and the pitch of the external thread of the bolt is aligned in the concave body part. A coil spring comprising a coil portion having a coil pitch is disposed, and one end portion of the coil spring is inserted into a through groove formed in the wing portion matching the starting point to be a fixed end, and the other end portion of the coil spring is Let it protrude outward from the periphery of the body part as a free end ,
The one end portion of the coil spring is bent toward the other end side in parallel with the axial direction of the coil portion at a position outward from the outer periphery of the coil portion, and this coincides with the starting point of the female screw groove. 2. The wing nut locking device according to claim 1, wherein the wing nut is inserted into the through groove of the wing portion, and the tip of the one end portion is bent to be engaged with a protrusion formed in the through groove. . The opening which projects the said other end part of the said coil spring outward from the periphery of the said trunk | drum is provided in the said periphery of the said trunk | drum located in the immediate vicinity of the root of the said wing | blade part. Wing nut locking device.

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