JP2017015117A - Bolt loosening prevention jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bolt looseness prevention jig easily installed and capable of surely preventing looseness of a bolt or nut.SOLUTION: A jig A for preventing looseness of a bolt 7 and a nut 8 in a state of being fastened to a fixation target 10, includes: a locking part 2 including an open hole for penetrating a head part 7a of the bolt 7 or the nut 8; a fitting part 4 for fixing the jig A in a state where the head part 7a of the bolt 7 or the nut 8 is penetrated through the open hole; and a locking piece provided on the peripheral edge of the open hole, penetrating through the open hole, and locking the head part 7a of the bolt 7 or the nut 8.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bolt loosening prevention jig for preventing loosening of bolts and nuts.

  For example, bolts and nuts used in structures that are subject to vibration or shaking, such as suspended ceilings in which ceiling foundations such as field edges and field edge supports are suspended and supported by suspension bolts, are likely to loosen in their fastening state.

  For this reason, for example, a spring washer having a plurality of protrusions on the front and back surfaces is used (see, for example, Patent Document 1), or a washer having a recess corresponding to the head of the bolt is fixed to the bolt mounting position. Then, after inserting and fixing the shaft portion of the bolt into the insertion hole at the center of the recess of the washer, a clearance member such as a resin putty is filled in the gap between the recess and the periphery of the head of the bolt (for example, see Patent Document 2). Such methods have been proposed and put into practical use as measures to prevent bolt loosening.

JP 2002-31120 A JP 2004-324734 A

  However, in the measures to prevent loosening using a spring washer with a plurality of protrusions, the bolts and nuts are likely to loosen if the protrusions of the plurality of protrusions are loose. .

  On the other hand, in order to prevent loosening by providing a washer with a recess, and fixing the head (or nut) of the bolt accommodated in the recess with a locking member such as a resin putty, it takes time to fill the locking member. Since the bolt cannot be removed again by the hardened detent member, its application is greatly limited.

  In view of the above circumstances, an object of the present invention is to provide a bolt loosening prevention jig that can be easily installed and reliably prevents loosening of bolts and nuts.

  In order to achieve the above object, the present invention provides the following means.

  The bolt loosening prevention jig of the present invention is a jig for preventing loosening of a bolt and a nut in a state of being fastened to a fixing object, and includes a through hole through which the bolt head or the nut penetrates. A locking portion; and an attachment portion for fixing a jig in a state where the head of the bolt or the nut is passed through the through-hole, and penetrates the through-hole to the periphery of the through-hole. And a locking piece for locking the head of the bolt or the nut.

  According to the bolt loosening prevention jig of the present invention, since the locking piece is provided on the periphery of the through hole, it can be easily and reliably secured only by passing the nut or bolt head through the through hole. The bolt can be prevented from loosening.

It is a figure which shows the state which prevented the loosening | tightening of the bolt and nut of the fastening state with the volt | bolt loosening prevention jig | tool which concerns on one Embodiment of this invention. It is a top view which shows the jig | tool for bolt loosening prevention which concerns on one Embodiment of this invention. It is a top view which shows the head or nut of the volt | bolt which concerns on one Embodiment of this invention.

  Hereinafter, a bolt loosening prevention jig according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

  Here, the bolt loosening prevention jig according to the present invention includes a bolt used in a structure that receives vibration and vibration, such as a suspended ceiling formed by hanging and supporting a ceiling base such as a field edge or a field edge receiver with a suspension bolt. This is a suitable member for use in preventing the nut from loosening.

  The bolt loosening prevention jig A of the present embodiment is formed by, for example, bending a metal rectangular flat plate, and is parallel with a predetermined interval as shown in FIGS. 1 and 2. A substantially U-shaped bolt / nut retainer portion 3 comprising a pair of side portions 1 and a locking portion 2 that connects one end portions of the pair of side portions 1, and each side portion 1 of the bolt / nut retainer portion 3. And a pair of attachment portions 4 extending outward in the width direction perpendicular to the respective side portions 1 from the other end portion of each other, and are formed in a substantially Ω-shape.

  Further, the locking portion 2 of the bolt / nut pressing portion 3 is provided with a through hole 5 penetrating from one surface to the other surface at the center, and a plurality of locking pieces 6 in which the through hole 5 protrudes inward from the peripheral edge. It has.

  Further, as shown in FIGS. 2 and 3 (see FIG. 1), the plurality of locking pieces 6 are formed of a virtual circle S1 that connects the tips of the plurality of locking pieces 6 with the central axis O1 of the through hole 5 as the center. The diameter d1 is the same diameter or slightly larger (substantially the same diameter) as the diameter d2 of the virtual circle S2 that is in contact with a plurality of sides with the central axis O2 of the nut 8 (or the head 7a of the bolt 7) as the center. Is formed.

  The plurality of locking pieces 6 have a diameter d3 of a virtual circle S3 that connects the base ends of the plurality of locking pieces 6 with the central axis O1 of the through hole 5 as the center, and the nut 8 (or the head 7a of the bolt 7). ) And a diameter d4 of a virtual circle S4 connecting a plurality of corners.

  Further, in the present embodiment, the locking piece 6 is formed in a triangular shape in plan view with the tip as a point, and the plurality of locking pieces 6 are continuously in the circumferential direction with the central axis O1 of the through hole 5 as the center. And the latching | locking part 2 is formed in parallel over the perimeter. Thereby, as for the through-hole 5 of the latching | locking part 2, the perimeter part is formed in the substantially circular shape of jaggedness.

  On the other hand, the mounting portion 4 of the present embodiment is formed with an insertion hole 4a for driving a screw 9 or the like penetrating from one surface to the other surface.

  The bolt loosening prevention jig A of the present embodiment having the above-described configuration is configured such that the nut 8 (or the head of the bolt 7) is inserted into the through-hole 5 of the locking portion 2 with respect to the bolt 7 and the nut 8 that are fastened to the fixed object 10. In this state, each mounting portion 4 is fixed to the fixing object 10 with screws 9 or the like. In addition, you may make it attach the attachment part 4 using other fixing means, such as an adhesive agent.

  At this time, the plurality of locking pieces 6 have the same diameter d2 as the virtual circle S2 in contact with the plurality of sides of the nut 8 (or the head 7a of the bolt 7). A plurality of corners of the nut 8 (or the head 7a of the bolt 7) are formed with a slightly larger diameter (substantially the same diameter) and the diameter d3 of the virtual circle S3 connecting the base ends of the plurality of locking pieces 6 Are formed with a diameter larger than the diameter d4 of the virtual circle S4 connecting the two.

  For this reason, when penetrating through the through hole 5, the nut 8 is in a state in which corners are arranged between the adjacent locking pieces 6.

  Accordingly, when the mounting portion 4 is fixed while the nut 8 is passed through the through-hole 5 and the bolt loosening prevention jig A is mounted, the corners and sides of the locking piece 6 are locked and the nut 8 is rotated. Is regulated. Therefore, loosening of the nut 8 (bolt 7) is reliably prevented.

  Therefore, in the bolt loosening prevention jig A of the present embodiment, a plurality of locking pieces 6 are provided on the periphery of the through hole 5, and the nut 8 is fixed to the through hole 5 while passing through it. The nut 8 and the bolt 7 can be reliably prevented from loosening.

  Further, in the present embodiment, since the plurality of locking pieces 6 are continuously arranged over the entire circumference of the through hole 5, the nut 8 can be placed in the through hole 5 without particularly worrying about the relative position with respect to the nut 8. , The nut 8 can be locked by any of the locking pieces 6, and the looseness of the nut 8 and the bolt 7 can be prevented. That is, loosening of the nut 8 and the bolt 7 can be prevented more easily.

  As mentioned above, although one embodiment of the jig | tool for bolt loosening prevention concerning this invention was described, this invention is not limited to said one Embodiment, In the range which does not deviate from the meaning, it can change suitably.

  For example, in the present embodiment, the nut 8 is passed through the through hole 5 and the bolt loosening prevention jig A is attached, and the rotation of the nut 8 is regulated to prevent the bolt 7 from loosening. Of course, the bolt 7 head 7a is passed through the through-hole 5, and the bolt loosening prevention jig A is attached, or the bolt 7 loosening prevention jig A is attached to the head 7a side and the nut 8 side of the bolt 7, respectively. Thus, loosening of the bolt 7 may be prevented.

  Moreover, in this embodiment, the some locking piece 6 shall be continuously arranged in parallel over the perimeter of the periphery of the through-hole 5. As shown in FIG. On the other hand, since the bolt 7 can be prevented from loosening by locking some corners and sides of the head portion 7a of the nut 8 and the bolt 7 to the locking piece 6, only at the local area of the periphery of the through hole 5. A locking piece 6 may be provided.

DESCRIPTION OF SYMBOLS 1 Side part 2 Locking part 3 Bolt / nut holding part 4 Mounting part 4a Insertion hole 5 Through hole 6 Locking piece 7 Bolt 7a Head 8 Nut 9 Screw 10 Fixing object A Bolt loosening prevention jig

Claims (1)

A jig for preventing loosening of bolts and nuts in a state of being fastened to a fixed object,
A locking portion having a through-hole through which the bolt head or the nut passes, and an attachment portion for fixing a jig in a state where the bolt head or the nut is passed through the through-hole. Prepared,
And the bolt loosening prevention jig | tool characterized by including the latching piece which penetrates the said through-hole at the periphery of the said through-hole, and latches the head of the said bolt or the said nut.

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