JP2005248504A - Implanting structure of anchor bolt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an implanting structure of an anchor bolt to a wall, aiming at soundproofing, sound absorption, heat insulation and fire resistance, by sacrificing mechanical proper strength. <P>SOLUTION: A splitting slot 12 orthogonal to the axis is formed in the required longitudinal shaft direction from the tip. A pin hole 13 orthogonal to the splitting slot 12 is opened on the tip of the splitting slot 12 of a hollow screw bar 11 for arranging a male screw 16 having the required length on the outer periphery from the rear end. An anchor 10 provided with an arrowhead 15 having the expanding free end with a pin 14 inserted into this pin hole 13 as a shaft, is inserted into a bottomed hole H arranged on a wall W. The implanting structure is constituted by injecting and solidifying a joining resin U into a void between the bottomed hole H and the anchor 10 from a hollow hole 17 of the hollow screw bar 11 of this anchor 10. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an anchor bolt implanting structure for attaching a signboard / poster or the like to a wall or panel (hereinafter simply referred to as a wall), and more particularly to an anchor bolt implanting structure for attaching a signboard / poster etc. to a soft wall.

  As a prior art of the anchor bolt, there is Patent Document 1 or Patent Document 2.

JP 2002-327437 A (Abstract and drawings) Japanese Utility Model Publication No. 6-69412 (abstract and drawing)

  The above-mentioned patent documents all relate to a technique for implanting anchor bolts on a solid wall for construction of civil engineering such as concrete and stone, and floor, and is a solidified wall made of a mixture of rock wool with a binder and a binding aid. (For example, described in JP-A No. 2000-269682) and wall materials formed by mixing various fillers with calcium silicate (for example, described in JP-A No. 7-257958), the appropriate mechanical strength It was not very applicable to implanting anchor bolts in walls for the purpose of soundproofing, sound absorption, heat insulation, fire resistance, etc.

  The reason is that the wall is porous and rock wool or shirasu, and in some cases like a rice husk, is mixed with a binder and solidified, so it is very low in strength and anchor bolts are implanted. This is because how hard the part is fixed may cause the wall around the planted area to come off.

  In view of the above situation, an object of the present invention is to provide an anchor bolt implantation structure in a wall for the purpose of soundproofing, sound absorption, heat insulation, fire resistance, and the like at the expense of mechanical strength as described above.

  In order to solve the above-described problems, the present invention provides a hollow screw rod in which a split groove perpendicular to the central axis is inserted in the required length axis direction from the front end and a male screw having a required length is provided from the rear end to the outer periphery. A bottomed hole provided in the wall with an anchor provided with a ridge that opens a free end with the pin inserted into the pin hole as an axis at the tip of the split groove. Inserted into the hollow hole of the anchor screw screw into the gap between the bottomed hole and the anchor, and the resin is injected and solidified. The hollow screw rod is provided on the wall. When inserting into the bottomed hole, the above-mentioned ridge is constricted in the split groove, and the squeezed ridge is opened by a wedge rod driven from the rear end of the hollow hole, and its tip bites into the inner surface of the bottomed hole Or the heel is biased in the opening direction by a spring. Furthermore, the split groove is opened by pressing the taper cone with the female screw at the center into the split groove provided at the tip of the hollow screw rod and screwing the screw rod, and the tip is formed on the inner surface of the bottomed hole. You can also bite in.

According to the present invention configured as described above, a hollow screw rod having a flange provided at the tip thereof is inserted into a bottomed hole provided in the wall, and the flange is widened to bite into the inner surface of the bottomed hole. The anchor bolt is not fixed in part by injecting the binding resin into the entire gap between the bottomed hole and the bottomed hole. The hollow screw rod does not go idle because the tip of the flange bites into the inner surface of the bottomed hole.
Moreover, by injecting the binding resin into the entire gap between the hollow screw rod and the bottomed hole as described above, the binding resin penetrates and solidifies into the porous portion around the inner surface of the bottomed hole, and the strength of the portion increases. The effect of further increasing the holding force of the anchor bolt is exhibited.

[Example 1]
Next, Embodiment 1 of the present invention will be described with reference to FIGS. A bottomed hole H is dug by a known method in a wall W intended for soundproofing, sound absorption, heat insulation, fire resistance, etc. at the sacrifice of mechanical strength, and an anchor 10 is inserted into this bottomed hole H.

  The anchor 10 is provided with a split groove 12 in a direction orthogonal to the central axis from the tip of the hollow screw rod 11 to the middle, and a pin hole 13 so that the tip of the split groove 12 is perpendicular to the split groove. A flange 15 having a free end that can be opened and closed around a pin 14 fitted in the pin hole 13 is attached, and a male screw 16 is provided at the rear end of the hollow screw rod 11.

  A wedge rod 18 is driven from the rear end of the anchor 10 inserted into the bottomed hole H into the hollow hole 17 to open the flange 15, and the tip thereof bites into the inner surface of the bottomed hole H and does not rotate freely. It will not fall out.

  In the above state, that is, in a state where the anchor 10 is inserted into the wall W and the wedge rod 18 is driven to widen the flange 15, the nozzle N of the binding resin injection gun G is inserted into the rear end of the hollow screw rod 11, and the binding resin U is inserted. Then, it is injected into the gap between the anchor 10 and the bottomed hole H through the hollow hole 17. The binding resin U used here is a urethane metallic resin composition obtained by kneading metal powder particles with urethane resin in a two-component reaction curable form, for example, trade name: HIT-HY20 manufactured by Nippon Hilti Corporation.

  After the anchor 10 is implanted in the wall W as described above, a hole provided in the sign 19 and the poster is fitted into the hollow screw rod 11, and the sign 19 is attached and fixed with the nut 21 through the washer 20. Although not shown in the drawing, if the above-mentioned hook has a structure in which a torsion spring is inserted into the pin 14 and is constantly biased in the opening direction, it can be left as it is when the anchor 10 is inserted. it can.

  Here, in the said Example, although the said urethane metallic resin composition was used as the binding resin U, it is not restricted to this, According to the state of the wall W which implants the anchor 10, and the intensity | strength calculated | required by the implanted anchor 10 It can be appropriately selected from age-curing resins (for example, urethane resins, epoxy resins, etc.) that are generally commercially available.

  In particular, when the strength of the wall W is low, it is effective to select a resin that can reinforce the periphery of the bottomed hole H so that the resin to be injected penetrates and solidifies slightly from the inner surface of the bottomed hole H. In this case, if an annular plug (not shown) is inserted between the opening of the bottomed hole H and the hollow screw rod 11 so that the injection pressure of the bonding resin injection gun G does not escape, the bottomed hole H The resin penetrates well from the inner surface and is effective.

[Example 2]
Next, Example 2 will be described with reference to FIG. A split groove 12 is provided at the front end and a male screw 16 is provided at the rear end to form a hollow screw rod 11. A small hole 22 is formed in the middle of the hollow screw rod 11 from the hollow hole 17 toward the outer surface. Yes.

  A tapered cone 24 having a female screw 23 at its center is assigned to the tip of the hollow screw rod 11 (the portion where the split groove 12 is provided), and an L-shaped screw rod 25 is screwed into this female screw 23. Is loaded into the bottomed hole H.

  When loaded, when the L-shaped threaded rod 25 is screwed into the female thread 23 of the tapered cone 24, the flange 26 of the L-shaped threaded rod 25 abuts against the rear end of the hollow threaded rod 11, and the tapered cone 24 is pulled toward the hollow threaded screw. The tip of the rod 11 and the portion where the split groove 12 is formed widen, and the tip 12t bites into the inner surface of the bottomed hole H.

  In this state, the L-shaped screw rod 25 is turned in the reverse direction to be removed from the hollow screw rod 11, and the nozzle N of the bonding resin injection gun G is inserted into the hollow hole 17 as described above, and the bottomed hole H, the hollow screw rod 11, The bonding resin U is injected into the gap, and the anchor bolt embedding according to this embodiment is completed.

  As described above, according to the present invention, when a signboard or the like is attached to a soundproof, sound absorbing, heat insulating, fireproof wall at the expense of mechanical strength, the strength of the wall can be reinforced and attached in a safe state. The utility value in the field is extremely large.

Sectional view of anchor bolt embedding structure according to the present invention (A) Cross-sectional view before inserting anchor and widening the ridge, (b) Cross-sectional view in a state where the ridge is widened Explanatory drawing injecting binding resin into gap between anchor and bottomed hole (A) Front view of anchor before insertion, (b) Cross section with the anchor inserted into the bottomed hole and the tip expanded.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Anchor 11 Hollow screw rod 12 Split groove 13 Pin hole 14 Pin 15 １８ 16 Male screw 17 Hollow hole 18 Wedge rod 19 Signboard 20 Washer 21 Nut 22 Small hole 23 Female screw (taper cone)
24 Taper cone 25 L-shaped threaded rod 26 鍔 (L-shaped threaded rod)
G Bonding resin injection gun H Bottomed hole N Nozzle U Bonding resin W Wall

Claims (6)

  In the anchor bolt implantation structure, a hollow anchor bolt having a retaining structure is inserted into a bottomed hole provided in a wall / panel, and a binder resin is injected and solidified into the gap between the anchor bolt and the bottomed hole. A special anchor bolt implant structure.   The retaining structure includes a split groove perpendicular to the central axis in the required length axis direction from the front end, and a hollow screw rod provided with a male screw having a required length from the rear end to the outer periphery. 2. The anchor bolt implantation according to claim 1, wherein a pin hole is formed at a tip of the pin so as to go straight to the split groove, and a free end is provided around the pin inserted into the pin hole. Construction.   When the hollow screw rod is inserted into the bottomed hole provided in the wall, the scissors are constricted in the split groove, and the constricted scissors are opened by a wedge rod driven from the rear end of the hollow hole, 3. The anchor bolt implanting structure according to claim 1, wherein the tip of the anchor bolt bites into the inner surface of the bottomed hole.   3. The anchor bolt implantation structure according to claim 1, wherein the hook is urged in a direction of opening by a spring.   The above retaining structure has a slit at the tip of the hollow anchor bolt, a taper cone having a female screw at the center is inserted at the tip of the split groove, and the taper cone is screwed into the female screw. 2. The anchor bolt implantation structure according to claim 1, wherein the screw shaft is removed after biting into a tip end of a hollow anchor bolt having the split groove formed by screwing a rod. .   6. The anchor bolt implanting structure according to claim 1, wherein a through hole is provided in the hollow anchor bolt from the outer surface toward the hollow hole.

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