JP2010019393A - Whirl stop device for tightening bolt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a whirl stop device capable of maintaining surely a whirl stop state for a tightening bolt of a tightening device. <P>SOLUTION: This whirl stop device has a recessed groove 8 arranged coaxially with respect to an insertion through-hole 6 in a one-side article to surround the insertion through-hole 6, and equipped with an irregular part 9 arrayed at least circumferentially and directionally on an outside inner circumferential wall 8". A locking hole 10 long along a circumferential direction is formed to be engaged with an elastic locking piece 12a of a loosening-preventive cap 12 engaged with the recessed groove 8 in a position opposed via the insertion through-hole 6 at a bottom wall 8''' of the recessed groove 8, and a locking stage 11 is formed to be locked with a tip locking part 12a' of the elastic locking piece 12a at an outer circumferential edge of the locking hole 10. The loosening-preventive cap 12 comprises a bottomed cylindrical body projected oppositely with the elastic locking pieces 12a, 12a at an opened end side is constituted to form a circumferential face into an irregular surface 13 meshed with the irregular part 9, and has a square recessed part 14 engaged so as to coincide with a square head 3a of the bolt 3 through the opened end on a deep wall face. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides the tightening bolt in the bolt tightening device for tightening the pair of articles together by screwing the tip of a tightening bolt inserted through an insertion hole provided in one article into a screw hole or nut on the other article side. The present invention relates to an anti-rotation device.

  Lock the bend piece at one end of the washer assembled to the tightening bolt to the article, place the other bend piece at the other end along one side edge of the polygon head of the tightening bolt, and tighten it. There is a structure in which rotation of a bolt (head) is restricted to prevent rotation (for example, Patent Document 1).

Japanese Utility Model Publication No. 61-146615

  When tightening or loosening items by operating the head of the tightening bolt, apart from tightening or loosening items by operating the nut screwed to the tightening bolt (separate) Since the conventional structure has a structure in which the washer is assembled to the tightening bolt and the tightening operation must be performed by operating the bolt head, a restriction piece is erected on the washer. In the state, the tightening operation cannot be performed.

  Therefore, in the conventional example, it is necessary to bend a part of the washer after the tightening operation to provide the restricting part piece, and the work is complicated.

  In addition, since the restriction piece is formed by bending a flat plate, it is not difficult to return it from the bent state (state of the restriction piece) to the original flat shape. There is also a disadvantage that the operation is performed and the detent state is easily broken.

  The present invention has been devised for the purpose of providing an anti-rotation device for a tightening bolt capable of reliably maintaining the anti-rotation state, paying attention to such drawbacks of the conventional example.

  In the bolt tightening device that tightens the pair of articles together by screwing the tip of the tightening bolt inserted into the insertion hole provided in one article into the screw hole or nut on the other article side, The insertion hole is provided coaxially with the insertion hole and surrounds the insertion hole, and the outer inner peripheral wall is provided with a concave groove having at least uneven portions arranged in the circumferential direction, and the insertion hole is formed in the bottom wall of the concave groove. A locking hole that is long in the circumferential direction is provided to engage with the elastic locking piece of the locking cap that engages with the recessed groove at a position opposed to each other, and the outer peripheral edge of the locking hole A locking step portion that is locked by the tip locking portion of the elastic locking piece is provided, and the locking cap is a bottomed cylindrical body that protrudes from the elastic locking piece facing the open end side. And has a concavo-convex surface meshing with the concavo-convex portion, and the opening on the back wall surface Square head of the bolt is configured to include a rectangular recess for fitting match throughout.

  According to the present invention, the locking cap is assembled so as to cover the square head of the clamping bolt in a state in which a pair of articles are clamped, and the assembled state is such that the tip locking portion and the receiving step portion are While maintained by the locking relationship, the rotation of the bolt head, that is, the tightening bolt, can be reliably restricted by the meshing relationship between the concave and convex surface on the cap side and the concave and convex portion on the article side, and the rotation preventing state can be maintained.

  1 is a front view of a cable support line retainer, FIG. 2 is a left side view of FIG. 1, and FIG. 3 is aa of FIG. 4 is a cross-sectional view taken along line bb of FIG. 3, FIG. 5 is a partially enlarged front view of one clamping member, FIG. 6 is a rear view of FIG. 5, and FIG. 7 is a front view of a locking cap. 8 is a plan view of FIG. 7, FIG. 9 is a left side view of FIG. 7, and FIG. 10 is a sectional view taken along the line cc of FIG.

  In the embodiment, a clasp main body 1 and a catch rod 2 that hooks a latch ring 2a at the tip end are provided on a catch material (hook) that protrudes from one end of the main body 1 and is provided in a building or the like. The clamping bolt 3 in a state in which a pair of clamping members 1A and 1A ′ constituting the main body 1 of the cable support wire clamp A are clamped to each other by the clamping bolt 3 and the clamping nut 4 via the hook 2. The present invention is applied to a rotation stopper.

  The retainer A clamps the support wires (not shown) engaged with the clamping grooves 5 and 5 by clamping the pair of clamping materials 1A and 1A 'to each other using the clamping bolt 3 and the clamping nut 4. The support line is retained, but since this is not relevant to the application of the present invention, the details are omitted.

  In the embodiment, the present invention is applied to the detent of the tightening bolt 3 for tightening the pair of sandwiching materials 1A and 1A ′, and the present invention can be applied to the detent of the tightening bolt of the article other than the sandwiching material. Not too long.

  In the embodiment, the tip of the tightening bolt 3 through which the insertion hole 6 provided in one sandwiching material 1A (article) is inserted is connected to the other clamping material 1A '(article) side through a communication hole 6'. The clamping members 1A and 1A '(articles) are tightened by being screwed into the clamping nut 4 engaged with the locking hole 7 to restrict the rotation, and the other clamping material 1A' is engaged. The present invention can also be applied to a structure in which a screw hole is provided instead of the communication hole 6 ′ provided in the stop hole 7 and its inner wall 7 a and the tip of the tightening bolt 3 is screwed into the screw hole, In short, the present invention expects that even if an external force is applied to the fastening bolt itself, it does not rotate.

  The one sandwiching material 1A is formed in a ring cylindrical shape composed of an inner peripheral wall surface 8 ′, an outer peripheral wall surface 8 ″ and a bottom wall surface 8 ″ ″ coaxially with the insertion hole 6 and surrounding the communication hole 6. A concave and convex portion 9 is provided on the outer peripheral wall surface 8 ″ of the concave groove 8, and the concave and convex portion 9 is alternately provided with protrusions and grooves along the axis of the insertion hole 6. The grooves are regularly arranged in the circumferential direction of the recessed grooves 8.

  In addition, the bottom wall surface 8 ″ ″ of the recessed groove 8 is provided with a long insertion hole 10 in the circumferential direction at a position opposed to the insertion hole 6, and the outer circumferential wall surface 10 ″ of the insertion hole 10 is recessed. A locking step portion 11 is provided on the outer peripheral side of the outer peripheral wall surface 8 ″ of the groove 8, and the hook-shaped tip locking portion 12 a ′ of the elastic locking piece 12 a of the locking cap 12 inserted into the insertion hole 10. Is locked.

  The insertion hole 10 is arranged along a circumference centered on the axis of the insertion hole 6, and when the fastening bolt 3 is tightened, any one of the corners (hexagonal) of the regular hexagonal head is formed. It has a length along the circumferential direction that always overlaps the axial direction of the insertion hole 6.

  The loosening prevention cap 12 is formed of a resin-made bottomed cylindrical body having an elastic locking piece 12a projecting on the open end side, and the peripheral surface is provided on the outer peripheral wall surface 8 ″ of the recessed groove 8. The groove 9 and the protrusion along the axis line are alternately arranged in the circumferential direction as in the case of the uneven portion 9, and the uneven portion 9 is formed with the uneven surface 13 having the same pitch, while the back wall surface is provided with the fastening bolt 3 The hexagonal head 3a is provided with a rectangular recess 14 in which the hexagonal heads 3a are matched and fitted.

  The elastic locking piece 12a is formed by extending a slit 15 along the axis of the cap 12 and extending from an intermediate portion of the cap 12. The elastic locking piece 12a is inserted into the insertion hole 10 through the recessed groove 8 at the tip thereof and is inserted into the insertion hole 10. The distal end locking portion 12 a ′ locked to the step portion 11 is provided.

  A pair of clamping members 1A and 1A 'are tightened into the locking holes 7 of one clamping member 1A' via the latching rod 2 (and the supporting lines are engaged with the clamping grooves 5 and 5). When the bolt 3 is screwed into the nut 4 through the insertion hole 6 and tightened from the other holding material 1A side through the washer (washer) 16 and tightened to the nut 4, A tightening state between 1A 'can be obtained. In this state, the elastic locking portion 12a of the locking cap 12 is inserted into the insertion hole 10 through the recessed groove 8 while the bolt head 3a is aligned with the rectangular recess 14, and the tip locking portion 12a 'is engaged with the stepped portion. When it is stopped, the cap 12 is prevented from being removed by the locking relationship, but the rotation of the locking cap 12 is restricted by the locking relationship between the uneven surface 13 and the uneven portion 9, and the rotation preventing state is maintained. It is.

The front view of a cable support line fastener. The left view of FIG. The aa line expanded sectional view of FIG. Bb sectional view taken on the line of FIG. The partially expanded front view of one clamping material. The rear view of FIG. The front view of a locking cap. The top view of FIG. The left view of FIG. FIG. 10 is a sectional view taken along line cc in FIG. 9.

Explanation of symbols

3 Tightening bolt 3a Square head 4 Tightening bolt 6 Insertion hole 8 Recess groove 8 "Outer inner peripheral wall 8""Bottom wall 9 Concavity and convexity 10 Locking hole 11 Locking step 12 Locking cap 12a Elastic locking part Fragment 12a 'Tip locking part 13 Uneven surface

Claims (1)

  In the bolt tightening device that tightens the pair of articles together by screwing the tip of the tightening bolt inserted into the insertion hole provided in one article into the screw hole or nut on the other article side, The insertion hole is provided coaxially with the insertion hole and surrounds the insertion hole, and the outer inner peripheral wall is provided with a concave groove having at least uneven portions arranged in the circumferential direction, and the insertion hole is formed in the bottom wall of the concave groove. A locking hole that is long in the circumferential direction is provided to engage with the elastic locking piece of the locking cap that engages with the recessed groove at a position opposed to each other, and the outer peripheral edge of the locking hole A locking step portion that is locked by the tip locking portion of the elastic locking piece is provided, and the locking cap is a bottomed cylindrical body that protrudes from the elastic locking piece facing the open end side. And has a concavo-convex surface meshing with the concavo-convex portion, and the opening on the back wall surface Square head of the bolt provided with a rectangular recess to be fitted to match through the clamping bolt detent device.

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