JP3668944B2 - Anchor nut fixing tool - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an anchor nut fixing tool used when fixing a load-supporting anchor nut in civil engineering, construction, or the like.
[0002]
[Prior art]
The construction state of a conventional anchor nut will be described with reference to FIG. 1, FIG. 2, and FIG.
[0003]
The conventional anchor nut shown in FIG. 1 has a taper-shaped widened edge portion 2 that is flared at one end opening edge portion of the tube portion 1, and has a female screw 3 formed on the inner peripheral surface of the tube portion 1. The other end side is a split cylinder portion 4, a taper is formed on the inner peripheral surface of the split cylinder portion 4, and a wedge body 5 is loaded in the cylinder portion 1.
[0004]
As shown in FIG. 2, the anchor nut is inserted into a prepared hole 7 drilled in the wall 6 in advance, and the tapered surface of the tapered widened edge 2 is locked to the corner edge of the opening of the prepared hole 7. The hitting rod 8 is inserted into the cylindrical portion 1 and the upper end surface of the wedge body 5 is hit to expand the split cylindrical portion 4 via the tapered surface of the split cylindrical portion 4 and bite into the inner wall of the prepared hole 7. When the wall 6 is soft, if the wedge body 5 is struck, the locking force at the corner edge of the opening of the pilot hole 7 is weak, and the taper before the split cylinder 4 expands. The shape-expanded edge portion 2 sinks in while cutting the corner edge portion of the opening portion of the lower hole 7, and after being pushed into the bottom portion 9 of the lower hole 7, the split cylinder portion 4 expands and bites.
[0005]
An anchor nut having no tapered widened edge portion shown in FIG. 3 is also conventional, and a female screw 12 is formed on the inner peripheral surface of one end cylindrical portion 11 of the anchor nut, and the other end side is a split cylindrical portion 13. The inner peripheral surface of the split cylinder portion 13 is tapered, and the wedge body 5 is loaded in the cylinder portion 11.
[0006]
As shown in FIG. 3, the anchor nut is inserted into the prepared hole 7 drilled in the wall 6, the end surface 14 of the split tube portion of the anchor nut is brought into contact with the bottom of the prepared hole, and the hitting bar 8 is inserted into the anchor nut. The wedge body 5 is struck and the wedge body 5 is advanced to expand the split cylinder portion 13 and bite and fix it to the inner wall of the prepared hole 7.
[0007]
[Problems to be solved by the invention]
As shown in FIG. 2, since the conventional anchor nut having the taper-shaped widening edge 2 has the taper-shaped widening edge 2 after fixing, the surface of the wall 6 has a thickness a of the taper-shaped widening edge 2. 15 has a problem of protruding from 15.
[0008]
When the wall 6 is soft, the taper-shaped widening edge 2 cuts off the corner edge of the opening of the pilot hole 7 and sinks into the surface 15 of the wall without the split cylinder portion 4 of the anchor nut being expanded. End up.
[0009]
Further, if the diameter b of the tapered widened edge portion 2 is made sufficiently large to prevent this penetration, the portion protruding from the surface 15 of the wall is further increased.
[0010]
Therefore, when the wall 6 is soft, the length d of the anchor nut and the depth e of the drilled hole to be drilled are made the same in order to solve the above-mentioned problem of the sinking, and the end face of the split cylinder portion of the anchor nut is set to the bottom of the pilot hole However, in practice, it is difficult to accurately drill the depth e of the pilot hole 7, and the insertion depth of the anchor nut varies.
[0011]
When the cylindrical end face 10 of the anchor nut having no tapered widened edge shown in FIG. 3 is fixed on the same plane as the wall surface 15, the depth of the prepared hole to be drilled is anchored even when the wall is hard. The end face of the split cylinder must be in contact with the bottom of the hole in the same way as the length of the nut. However, in the same way as above, it is difficult to drill the depth of the pilot hole with high accuracy. Difficult to avoid variations in depth.
[0012]
Also, because the depth of the pilot hole is measured by inserting the measure into the pilot hole, it may be determined that the length of the anchor nut is the same without noticing that the scraped pieces remain in the drilled pilot hole. . When the anchor nut wedge 5 is hit with the hitting bar 8 as it is, the uncut pieces under the split cylinder portion of the anchor nut may be crushed and the anchor nut may be submerged. At that time, if the split cylinder portion is expanded, it cannot be taken out from the hole and cannot be redone.
[0013]
Therefore, the drilled prepared hole 7 should not leave any shaving debris, but the diameter of the prepared hole c is small even when the debris is sucked by the suction machine, so that the nozzle of the suction machine does not enter the prepared hole 7 and is completely It is difficult to remove.
[0014]
If the pilot hole 7 is dug too deeply, the bottom of the pilot hole 7 must be filled with a hard material, and the pilot hole 7 must be adjusted to the same depth as the length d of the anchor nut.
[0015]
Also, when hitting the anchor nut with the stick 8 and holding it diagonally, the anchor nut may be fixed diagonally and the core of the anchor nut may be misaligned. In this case, it can be removed from the hole. Redoing is impossible.
[0016]
[Means for Solving the Problems]
The present invention provides an anchor nut fixing tool that solves the above problems. The anchor nut fixing tool shown in the upper part of FIG. 4 has a configuration in which a seat is screwed onto the outer peripheral surface of a hitting rod insertion guide pin having a through hole for a hitting rod, and the vertical position of the seat is adjusted by the screwing amount. Further, the female screw cylinder at the upper end of the anchor nut is screwed and fastened to the outer peripheral surface of the male screw provided at the lower end of the hitting rod insertion guide pin, and the anchor nut is inserted into the pilot hole in the fastened state. The seating surface of the seat is seated on the opening surface of the pilot hole to set the insertion depth of the anchor nut, and the wedge body that fits into the anchor nut is pushed in by hitting the hitting bar that is inserted into the insertion hole. The part of the split cylinder of the anchor nut is expanded and fixed to the inner wall surface of the prepared hole in the wall.
[0017]
According to the anchor nut fixing tool of the present invention, the anchor nut shown in FIG. 3 having no tapered widened edge portion is used, and the female screw of the anchor nut and the male screw of the tool are screwed and fastened together. Insert into the pilot hole. As a result, the seating surface of the tool is locked to the opening surface of the pilot hole, so that the anchor nut can be inserted at an appropriate depth by the seat and the anchor nut will not sink even if the hole is dug deeply. .
[0018]
When the anchor nut is screwed and supported to the hitting rod insertion guide pin of this tool, when the hitting rod is hit, the hitting pressure by the hitting rod is applied to the anchor nut through the wedge body embedded in the anchor nut, The striking pressure load is applied to the guide pin, further transmitted to a seat screwed to the outer peripheral surface of the guide pin, and the load is received by the surface of the pilot hole opening, so that intrusion into the pilot hole can be effectively prevented.
[0019]
Further, the anchor nut can be fixed at an appropriate depth by adjusting the vertical position of the seat by the screwing amount according to the thickness of the attachment object and the insertion depth of the anchor nut.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to FIGS. 4, 5, 6, 7, and 8. 4 is a sectional view of the entire anchor nut fixing tool of the present invention.
[0021]
The anchor nut fixing tool of the present invention shown in the upper part of FIG. 4 has a hitting bar insertion guide pin 16 as a main body, and has a hitting bar insertion hole 17 penetrating on the axis of the guide pin 16.
[0022]
Further, the seat 18 is screwed to the outer peripheral surface of the hitting bar insertion guide pin 16 and the vertical position of the seat 18 is adjusted by the screwing amount, and further provided at the lower end of the hitting bar insertion guide pin 16. The male screw 19 has a hitting bar 20 that is screwed into the female screw 12 of an anchor nut that does not have a taper-shaped widened edge shown in the middle of FIG.
[0023]
The middle part of FIG. 4 is a conventional anchor nut having no tapered widened edge, and an internal thread 12 is formed on the inner peripheral surface of the one end side cylindrical portion 11 of the anchor nut, and the other end side is A split cylinder portion 13 is formed, a taper is formed on the inner peripheral surface of the split cylinder portion 13, and the wedge body 5 is loaded in the cylinder portion 11. The part 13 is expanded and bitten and fixed to the inner wall of the prepared hole.
[0024]
The lower part of FIG. 4 is a cross-sectional view showing a state in which an attachment object 23 in which a lower hole 22 corresponding to the lower hole 7 is formed is overlapped on the wall 6 in which the lower hole 7 is formed. The present invention includes the case where this object does not exist.
[0025]
The seat 18 is circular, regular polygonal, I-shaped, cruciform, or the like, and has a female screw hole 25 penetrating on the axis of the central portion thereof, while a male screw 26 is provided on the outer peripheral surface of the guide pin 16. Then, while the guide pin 16 is inserted into the female screw hole 25 of the seat 18, the female screw on the inner peripheral surface of the female screw hole 25 and the male screw 26 on the outer peripheral surface of the guide pin 16 are screwed together. The upper and lower positions of the seat 18 are adjusted by moving forward or backward, and the anchor nut is suspended from the lower end of the hitting bar insertion guide pin 16 on a coaxial line.
[0026]
Further, an anchor nut screwing shaft portion 27 having a diameter smaller than that of the male screw 26 forming portion is provided at the lower end of the guide pin 16 on the same axis, and a step portion 28 is formed at the upper end of the anchor nut screwing shaft group 27. To do.
[0027]
The hitting bar insertion hole 17 passes through the anchor nut screwing shaft portion 27.
[0028]
First, when an attachment object 23 with a prepared hole 22 shown in the lower part of FIG. 4 is already placed on the surface of the wall 6, a drill or the like is passed through the prepared hole 22, and the length of the anchor nut is passed through the wall 6. The prepared hole 7 is dug in the wall sufficiently deeper than f, and the shavings remaining in the prepared wall hole 7 are removed if necessary.
[0029]
Next, as shown in the upper and middle stages of FIG. 4, a taper-shaped widened edge portion is provided on the male screw 19 of the anchor nut screwing shaft portion 27 having a diameter smaller than that of the male screw forming portion at the lower end of the hitting rod insertion guide pin 16 of this tool. The anchor nut cylinder part end face 10 that does not have is screwed and tightened until it abuts against the step part 28.
[0030]
Thus, the distance g between the cylindrical end surface 10 of the anchor nut shown in FIG. 5 and the seat surface 21 of the seat screwed to the outer periphery of the hitting rod insertion guide pin 16 is the same as that of the attachment object shown in the lower part of FIG. It is adjusted and set by the screwing amount of the seat 18 according to the thickness h.
[0031]
Next, as shown in FIG. 6, the anchor nut is inserted into the wall lower hole 7 that can communicate with the lower hole 22 concentrically with the mounting object 23, and the seat surface 21 of the tool is seated on the lower hole opening surface 24. Dress it up.
[0032]
Then, as shown in FIG. 7, the hitting rod 20 inserted into the through hole 17 of the guide pin 16 is hit in the arrow direction 28.
[0033]
As a result, as shown in FIG. 7, the wedge body 5 in the anchor nut is pushed by the hitting bar 20 to expand the split tube portion 13 of the anchor nut, and the split tube portion 13 bites into the inner wall of the prepared hole 7 in the wall. Fix it.
[0034]
After fixing, after the fastening of the male screw 19 of the anchor nut fixing tool of the present invention and the female screw 12 of the anchor nut is released and separated as shown in FIG. 8, the attachment object 23 is placed on the wall 6 at a predetermined position. It will be left as it is.
[0035]
【The invention's effect】
According to the anchor nut fixing tool of the present invention, the insertion depth of the anchor nut into the pilot hole can be appropriately set by adjusting the screwing amount of the seat. Moreover, since the seat surface of the seat of this tool contacts the object to be attached or the prepared hole opening surface of the wall, the insertion depth of the anchor nut can be appropriately set even when the prepared hole is dug deeply.
[0036]
In addition, since the surface of the seat is seated on the opening surface of the pilot hole and the striker is struck, the end surface of the tubular portion of the anchor nut does not protrude from the surface of the wall, and the surface of the wall and the tubular portion end surface of the anchor nut are connected. Can be fixed at an appropriate depth.
[0037]
Also, when the guide pin and anchor nut of this tool are screwed together and inserted into the drilled prepared hole, the seat surface of the seat of this tool is seated on the prepared hole opening surface, which can occur when the anchor nut is driven alone. There is no need to drive diagonally, and it is possible to prevent the problem that the core of the anchor nut is displaced due to driving perpendicular to the surface of the wall.
[0038]
The cylindrical end surface of the anchor nut can be fixed on the same plane as the opening surface of the pilot hole, which is good for safety and scenery after removal of the attachment object.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an anchor nut having a tapered-shaped widening edge portion 2 that has been conventionally used.
FIG. 2 shows that the hitting bar 8 is inserted into the cylindrical part 1 of the anchor nut and the end surface of the wedge body 5 is hit to expand the split cylindrical part 4 through the tapered surface of the split cylindrical part 4; It is sectional drawing which showed the state which was bitten and fixed to the inner wall of the hole.
FIG. 3 is a cross-sectional view showing a state in which an anchor nut that does not have a tapered opening edge portion that has been used conventionally is inserted into the hole 7 in the wall, and a hitting bar 8 is inserted into the anchor nut. is there.
FIG. 4 shows the anchor nut fixing tool of the present invention in the upper stage, the conventional anchor nut having no tapered widened edge in the middle stage, and the mounting object 23 and the wall 6 drilled in the lower stage. It is sectional drawing which shows the state.
FIG. 5 is a cross-sectional view showing a state in which an anchor nut not having a taper-shaped widening edge portion is fastened to the adjustment anchor nut fixing tool of the present invention. An anchor nut that does not have an enlarged edge is screwed and fastened, inserted into the mounting object 23 and the lower holes 22 and 7 of the wall, and the seat surface 21 of the seat is brought into contact with the opening surface 24 of the mounting object. It is sectional drawing which shows a state.
7 is a cross-sectional view showing a state in which the striking rod 20 is hit from the state of FIG. 6 and the wedge body 5 is pushed, the split cylinder portion 13 is expanded and bitten and fixed to the inner wall surface of the prepared hole 7. FIG.
FIG. 8 is a cross-sectional view showing a state where the male screw 19 of the anchor nut fixing tool is released from the female screw 12 of the anchor nut and the tool is separated and removed.
[Explanation of symbols]
1-Tube portion of an anchor nut having a taper-shaped widening edge portion 2-Tapered-shaped widening edge portion 3-Female screw threaded on the inner peripheral surface of an anchor nut having a taper-shaped widening edge portion 4-Taper-shaped widening A split cylinder part having a taper formed on the inner peripheral surface of an anchor nut having a mouth edge part 5-a wedge body 6 loaded in the cylinder part 6-a wall 7 for fixing the anchor nut-a pilot hole 8-cylinder drilled in the wall A striking rod 9 for pushing forward the wedge body loaded in the part 9-bottom part 10 of the hole drilled in the wall 10-end face 11 of the anchor nut without the taper-shaped widening edge 11-taper-shaped widening edge Anchor nut tube portion 12 having no taper--anchored nut nut female screw 13--not having a taper-shaped widened edge portion--split tubular portion 14 having a taper formed on the inner peripheral surface of the anchor nut not having a taper-shaped widened edge portion -No tapered widened edge End face 15 of the split tube portion of the nuter nut-Wall surface 16-Strike bar insertion guide pin 17 of the tool-Through hole 18 penetrating the hit stick insertion guide pin of the tool-Seat 19 of the tool 19-Anchor nut female A male screw 20 screwed at the lower end of the hitting rod insertion guide pin of the tool to be screwed into the screw-A hitting rod 21 inserted through the hitting rod insertion guide pin of the tool-A seating surface 22 of the seat of the tool-mounting Pilot hole 23 of the object-Mounting object 24-Pilot hole opening surface 25 of the mounting object-Female screw hole 26 penetrating on the axis of the center of the seat-Screw on the outer periphery of the hitting rod insertion guide pin of the tool The provided male screw 27-anchor nut screwing shaft 28 provided at the lower end of the hitting rod insertion guide pin of the tool-the step at the upper end of the anchor nut screwing shaft provided at the lower end of the hitting rod insertion guide pin of the tool Department.
29-Taping direction of the hitting bar of the tool a-Thickness of a taper-shaped widening edge of an anchor nut having a tapered widened edge b-Taper-shaped widening edge of an anchor nut having a tapered widened edge Outer diameter c of the hole-Diameter of the pilot hole drilled in the wall-D-Drilled hole drilled in the full-length e-wall from the end face of the tubular part of the anchor nut having the tapered widened edge to the end face of the split cylindrical part Depth f-Overall length of anchor nut without tapered opening edge g-End face and seat of anchor nut without taper opening edge integrally screwed with hitting rod insertion guide pin of this tool Length between surfaces h-thickness of the object

Claims (1)

The seat is screwed to the outer peripheral surface of the hitting rod insertion guide pin having the insertion hole of the hitting rod, and the vertical position of the seat is adjusted by the screwing amount. The female screw cylinder at the upper end of the anchor nut is screwed and fastened to the outer surface of the provided male screw, and the anchor nut is inserted into the pilot hole in the fastened state, and the seat surface of the seat is seated on the pilot hole opening surface by the insertion. Set the insertion depth of the anchor nut, and push the wedge body that fits into the anchor nut by hitting the hitting bar that penetrates the insertion hole to expand the split cylinder portion of the anchor nut, An anchor nut fixing tool characterized in that it is configured to be fixed to the inner wall surface of the prepared hole.

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