JP3084793U - Anchor bolt - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an anchor bolt for stone which can reduce construction time and manufacturing cost. SOLUTION: While being inserted into a hole formed in a stone material 80, a male screw portion is formed on an outer peripheral surface, and a bolt 30 provided with a tapered portion 31 at a rear end portion is loosely fitted to the bolt 30; A cylindrical sleeve 40 having a plurality of extended portions 43 extending from the rear end is screwed into the bolt 30, and the sleeve 40 is pushed backward so that the extended portion 43 is formed.
And a nut 50 for expanding the outer side of the sleeve 50. A rear end of the nut 50 is provided with a tubular portion 51 extending rearward. The front end 41 had a shape corresponding to the diameter.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to an anchor bolt for stone which can reduce the construction time and the manufacturing cost.

[0002]

[Prior art]

 As shown in FIG. 1, in the conventional anchor bolt, a sleeve 12 having a plurality of slits 13 is loosely fitted to a bolt 10, and a nut 14 is screwed onto the sleeve 12. At the time of actual construction, as shown in FIG. 2, an anchor bolt is driven into a small-diameter hole in the stone 15 with a hammer to bring the sleeve 12 into close contact with the wall surface. Then, as shown in FIG. 3, the nut 14 is screwed into the bolt 10 and rotated, and the bolt 10 is moved in the axial forward direction, so that the slit 13 in the sleeve 12 is tapered by the tapered portion 11. At the same time as opening to the outside, the extension (unsigned) is extended to fix the anchor bolt in the hole of the stone 15.

As shown in FIG. 4, an anchor bolt having a shape different from that described above is such that a metal sleeve 22 is loosely fitted to a bolt 20, and a polygonal nut-shaped nut is attached to the front end of the metal sleeve 22. 24 are provided, and a plurality of slits 23 are formed on the peripheral surface at the rear end. At the time of actual construction, as shown in FIG. 5, an anchor bolt is inserted into a hole formed in the stone material 25, and then, as shown in FIG. By rotating the nut 10 in the sleeve 22 to move the bolt 10 forward in the axial direction, the slit 23 in the sleeve 22 is opened outward by the tapered portion 21 and at the same time, the expanded portion (unsigned) is expanded. Then, the anchor bolt is fixed in the hole of the stone material 25.

[0004]

[Problems to be solved by the invention]

 However, when the former anchor bolt is to be fixed in the hole formed in the stone 15, a gap is generated between the wall surface of the hole and the peripheral surface of the bolt, and the hole is drilled deeper in the stone 15. Can not be used for thin stones. Further, when the anchor bolt is driven into the hole of the stone 15 with a hammer, an impact force is generated, so that the stone 15 is easily broken. Further, since the latter anchor bolt moves axially while the slit 23 and the head 24 of the sleeve 22 rotate together at the time of construction, it is difficult to control the expansion to the outside of the expansion part.

[0005] The present invention solves the above-mentioned problems, and a bolt having a male screw portion formed on an outer peripheral surface and a tapered portion provided at a rear end portion while being inserted into a hole formed in a stone material. A cylindrical sleeve, which is loosely fitted to the bolt and has a plurality of extended portions formed at the rear end thereof, and which is screwed to the tip of the bolt and pushes the sleeve rearward to extend the extended portion. And a nut that extends rearward, and a tubular portion that extends rearward is provided at the rear end of the nut. The sleeve can be quickly and stably moved rearward by inserting the cylindrical portion into the hole of the stone material and rotating the nut while contacting the front end of the sleeve. It is also possible to prevent the excavation of stone at the time.

Further, a small-diameter portion is formed at a position adjacent to the tapered portion at the rear end of the bolt, and the small-diameter portion is formed so that the sleeve can be directly loosely fitted at the time of forming the sleeve. By making the front wall thick, it is possible to prevent the sleeve from falling off, and a minus-shaped groove is formed at the front end of the bolt, and by fitting a corresponding tool into the minus-shaped groove, The bolt is normally rotated to prevent the bolt and the nut from rotating together in the same direction, and the nut is normally rotated to smoothly move the cylinder rearward in the axial direction. Therefore, the construction time can be considerably reduced.

[0007]

[Means for Solving the Problems]

 The anchor bolt according to the present invention is inserted into a hole in a stone material 80, has a male screw portion formed on an outer peripheral surface thereof, and has a tapered portion 31 provided at a rear end portion thereof. A plurality of extended portions 43 extending from the rear end are formed. A cylindrical sleeve 40 is screwed into the distal end portion of the bolt 30, and the sleeve 40 is pushed backward to push the extended portion 43 back. An anchor bolt composed of a nut 50 extending outward and a rear end portion of the nut 50 provided with a tube portion 51 extending rearward, and a front end surface of the tube portion 51 has a diameter of the sleeve. 40 is characterized in that it has a shape corresponding to the diameter of the rear end portion.

[0008]

[Embodiment of the invention]

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 7 is an exploded perspective view of the anchor bolt according to the present invention, FIG. 8 is a side sectional view when the anchor bolt of FIG. 7 is fixed to a stone, and FIG. 9 is fixed to the anchor bolt of FIG. FIG. 10 is an exploded perspective view showing a state where the hanging member is attached to the stone surface by the anchor bolt shown in FIG. 9, and FIG. FIG. 12 is an exploded perspective view showing another embodiment of the anchor bolt according to the present invention, and FIG. 13 is an exploded perspective view showing still another embodiment of the anchor bolt according to the present invention. FIG.

As shown in FIG. 7, the anchor bolt according to the present invention includes a bolt 30, a sleeve 40, and a nut 50. The bolt 30 has an external thread portion (not shown) formed on the outer periphery thereof, and a rear portion thereof. A tapered portion 31 extending outward is provided at an end portion, and a minus-shaped groove 32 is formed at a front end surface. The sleeve 40 is loosely fitted to the bolt 30, and a plurality of slits 42 and expansion portions 43 are formed at equal intervals at the rear end of the sleeve 40. The nut 50 is screwed to the bolt 30, and a rear end portion of the nut 50 is provided with a cylindrical portion 51 extending rearward. The diameter of the rear end surface of the cylindrical portion 51 is the same as that of the sleeve 40. The inner diameter of the nut 50 and the cylindrical portion 51 is entirely formed on the inner peripheral surface of the nut 50 and the female screw portion 52 screwed with the bolt 30 is formed. ing.

Further, the sleeve 40 does not need to be provided with a threaded portion on the polygonal head and the inner peripheral surface as in the conventional example, and all the parts have the same thickness. In addition, the length of the nut 50 is short, and there is no need to process an expanded portion or a slit. Therefore, the sleeve 40 and the nut 50 are suitable for mass production, and the manufacturing cost can be reduced.

When the anchor bolt having the above configuration is actually attached, the sleeve 40 is loosely fitted to the bolt 30, the nut 50 is screwed and rotated, and the front end 41 of the sleeve 40 is pressed, and a plurality of expanded portions are formed. 43 is brought into contact with the tapered portion 31 of the bolt 30. Then, as shown in FIG. 8, the anchor bolt is immediately inserted into the hole of the stone material 80, and the tapered portion 31 of the bolt 30 reaches the deepest portion in the hole. At this time, an appropriate tool such as a flathead screwdriver is fitted into the flat groove to prevent the bolt 30 and the nut 50 from rotating together in the same direction, and to rotate the nut 50 normally. By moving the tubular portion 51 rearward in the axial direction, a pushing effect with high stability is generated in the tubular portion 51. Further, since the sleeve 40 moves rearward in the axial direction while completely contacting the peripheral surface of the bolt 30, the sleeve 40 does not rotate synchronously with the nut 50, and the plurality of substantially rectangular extension portions 43 of the sleeve 40 are also bolted. In the taper portion 31 of 30, it is surely expanded outward. Thereby, as shown in FIG. 9, the anchor bolt is completely positioned in the hole of the stone 80.

In the embodiment shown in FIG. 10, after the anchor bolt is fixed to the stone material 80, the front end of the bolt 30 and the nut 50 are exposed to the outside, and the nut 50 is combined with the elongated hole 61 of the hanging member 60. Then, the fixing nut 70 is screwed onto the bolt 30 to fix the hanging member 60 to the wall surface of the stone material 80.

Further, as shown in the embodiment of FIG. 11, a female screw portion 520 is formed only on the polygonal head, and a nut 500 on which the female screw portion is not formed on the inner peripheral surface of the cylindrical portion 51. May be used instead of the nut 50 in which the female screw portion 52 is formed over the entire inner peripheral surface of the cylindrical portion 51 from the head as shown in FIG.

As shown in the embodiment of FIG. 12, a plurality of extended portions 43 are formed by forming slits 42 at equal intervals directly on the peripheral surface of the sleeve 400 by punching. It may be formed with a small slit 420 that is integrally processed and is extended from.

Further, as in a modification shown in FIG. 13, in this embodiment, a small diameter portion 311 is formed at a position adjacent to the tapered portion 310 at the rear end portion of the bolt 300, and the sleeve 401 is attached to the small diameter portion 311. The sleeve 401 is formed such that the sleeve 401 is directly loosely fitted at the time of molding, and the thickness of the fitted and attached sleeve 401 is increased toward the rear, so that the sleeve 401 is detached from the bolt 300. And reduce construction time.

[0016]

[Effect of the invention]

 Since the present invention has the above-described configuration, the sleeve can be quickly and stably moved backward, and stones can be prevented from being broken at the time of construction. Further, a small-diameter portion is formed at a position adjacent to the tapered portion at the rear end of the bolt, and the sleeve is directly loosely fitted to the small-diameter portion when the sleeve is formed. By increasing the thickness, the sleeve can be prevented from falling off from the bolt, and a minus-shaped groove is formed in the front end surface of the bolt, and by fitting a corresponding tool into the minus-shaped groove, By rotating the bolt normally, it is possible to prevent the bolt and the nut from rotating in the same direction, etc., and to rotate the nut normally, so that the cylinder can be smoothly axially moved rearward. Therefore, the construction time can be significantly reduced and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a conventional anchor bolt.

FIG. 2 is a perspective perspective view when the anchor bolt of FIG. 1 is attached to a stone material.

FIG. 3 is a perspective perspective view showing a state in which a nut of an anchor bolt attached to the stone material of FIG. 1 is rotated to push a sleeve backward, and an expanded portion is expanded by a tapered portion.

FIG. 4 is an exploded perspective view of another conventional anchor bolt.

FIG. 5 is a perspective perspective view when the anchor bolt of FIG. 4 is attached to a stone material.

FIG. 6 is a perspective perspective view showing a state in which the nut of the anchor bolt attached to the stone material of FIG. 4 is rotated to move the sleeve rearward, and the expansion portion is expanded by the tapered portion.

FIG. 7 is an exploded perspective view of the anchor bolt according to the present invention.

FIG. 8 is a side sectional view when the anchor bolt of FIG. 7 is fixed to a stone material.

9 is a side sectional view when the anchor bolt of FIG. 7 has been fixed to a stone material.

FIG. 10 is an exploded perspective view showing a state where a hanging member is mounted on a stone surface by the anchor bolt of FIG. 9;

FIG. 11 is a perspective view showing another shape of the nut of the anchor bolt according to the present invention.

FIG. 12 is an exploded perspective view showing another embodiment of the anchor bolt according to the present invention.

FIG. 13 is an exploded perspective view showing still another embodiment of the anchor bolt according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 bolt 11 taper part 12 sleeve 13 slit 14 nut 20 bolt 21 taper part 22 sleeve 23 slit 24 nut 30 bolt 31 taper part 311 small diameter part 32 minus-shaped groove 40 sleeve 400 sleeve 401 sleeve 41 front end part 42 slit 420 small slit 43 expansion Part 50 Nut 500 Nut 51 Tube part 52 Female thread part 520 Female thread part 60 Hanging member 61 Long hole 70 Fixed nut 80 Stone

Claims (3)

[Utility model registration claims] 1. A bolt which is inserted into a hole formed in a stone material, has a male screw portion formed on an outer peripheral surface, and has a tapered portion provided at a rear end portion, and is loosely fitted to the bolt, and a rear end portion is provided. An anchor bolt comprising a cylindrical sleeve having a plurality of extended portions formed thereon, and a nut screwed into the bolt tip side and pushing the sleeve backward to expand the extended portion outward. A rear end portion of the nut is provided with a tubular portion extending rearward, and a rear end diameter of the tubular portion is formed in a shape corresponding to a diameter of a front end portion of the sleeve. And anchor bolts. 2. The anchor bolt according to claim 1, wherein a female screw portion is engraved on at least an inner peripheral surface of the nut and an inner peripheral surface of the cylindrical portion. 3. A small-diameter portion is formed at a position adjacent to the tapered portion at the rear end of the bolt, and the sleeve can be directly loosely fitted to the small-diameter portion when the sleeve is formed, and The anchor bolt according to claim 1, wherein the front wall of the sleeve is formed thick.