KR20030084114A - Anchor installation method and device for the installation - Google Patents

Abstract

Even if the thickness of the material such as stone or concrete wall is as small as about 30 to 80 mm, the bolts attached to the bolts are rotated and tightened firmly without hitting the anchor bolt into the insertion hole, and thus without destroying the insertion hole. The present invention provides a method of installing an anchor and an excavation apparatus for an insertion hole, which can be extended by opening the bolt tip part in the insertion hole.

Description

INSTALLATION METHOD AND DEVICE FOR Anchor {ANCHOR INSTALLATION METHOD AND DEVICE FOR THE INSTALLATION}

The present invention relates to an anchor used for attaching a metal material such as a section steel or a step bracket to a building structure such as a stone or a concrete wall surface, and more specifically, an anchor that can be enlarged and opened in a hole by an opening in an insertion hole. It relates to an installation method and an improvement of a device necessary for the installation.

Conventionally, as a means for attaching metal materials, such as section steel and a step bracket, to building structures, such as a stone and a concrete wall surface, a drilled insertion hole is installed previously in a stone, a concrete wall surface, etc., and the outside of a bolt into this insertion hole. The structure of the anchor which fastens a bolt in an insertion hole is widely known by attaching the anchor which fitted the cylinder to the cylinder, and pressing and expanding the tip of the cylinder in the insertion hole in the lateral direction of the hole.

As the anchor, generally, a conical enlarged opening is provided at the tip of the bolt, and a cylinder having a plurality of cutout grooves along the longitudinal direction is fitted at the tip of the bolt, and the bolt is inserted into the insertion hole formed by drilling. After inserting the cylinder and the cylinder, tap the rear end of the cylinder with the hammer from the outside and push the cylinder into the hole, and move the tip of the cylinder in the circumferential direction of the conical enlarged opening of the bolt end, The tip is pushed outward by the conical enlarged opening of the bolt end to be caught by the side wall of the insertion hole, and at the same time, the conical enlarged opening of the bolt end is brought into close contact with the inside of the enlarged opening of the cylindrical end to prevent the bolt from idle. It is known to have a structure such that strong pulling resistance is imparted to the.

As a further alternative, a plurality of notch grooves along the longitudinal direction are provided at the tip of the bolt with the hollow inside, and at the same time, a pin is projected on the rear end of the bolt and inserted into the insertion hole provided by the drill. After inserting the bolt, tap the rear end of the pin with a hammer outside the hole, and push the tip of the pin into the hollow of the bolt end to push the tip of the bolt divided into the notch groove outward to open the side of the insertion hole. It is known to have a structure that is hung on a wall surface to impart a strong pull resistance.

As described above, this type of anchor in the related art is a means for causing the tip of a bolt inserted into an insertion hole such as a stone or a concrete wall to be caught in the hole, and the rear end of the cylinder fitted to the outer periphery of the bolt, or In this case, it is indispensable to apply a strong impact force from the outside to the bottom of the hole because the end of the cylinder or bolt is extended and opened by hammering the pin protruding at the rear end out of the hole with a hammer. It becomes a condition.

Therefore, it is good when the thickness of the stone or concrete wall surface to which the anchor is to be installed is large, and the length of the insertion hole can be set sufficiently large, but the thickness of the material such as stone or concrete wall surface is small as about 30 to 80 mm. In this case (for example, when a natural slab of thickness 70mm, width 300mm, length 900mm is used for retaining wall, wall plate, formwork, etc.), if the depth of the bolt insertion hole is set to the normal length, the bolt inserted into the insertion hole When the pin at the rear end of the cylinder or the rear end of the bolt is hammered and driven into the hole, the insertion hole is broken because the bottom of the insertion hole is not sufficiently thick. By expanding and opening in a wedge shape, there is a problem that an excessive force is applied in the hole and the hole is broken.

1 is a side view showing the configuration of the insertion hole drilling equipment used in the anchor installation method of the present invention.

2 is a side view showing a state of use of the insertion hole drilling device.

Figure 3 is a side view showing the configuration of the anchor used in the anchor installation method of the present invention.

4 is a side view of a drill hole made prior to drilling and inserting an insertion hole by an excavation device.

Figure 5 is a side view showing the configuration of the insertion hole and the anchor provided in the anchor installation portion.

Fig. 6 is a side view showing the first step of inserting an anchor into the insertion hole.

7 is a side view similarly showing a second step.

8 is a side view similarly showing a third process.

[Description of the code]

1: Excavator

2: anchor installation

3: insertion hole

4: expansion opening

5: framework

6: guide opening

7: bearing support

8: Spherical sliding bearing

9: connection end

10: motor

11: axis of rotation

12: conical cutting edge

13: appearance

14: slope

15: tilt adjustment panel

16: drill

17: anchor

18: Bolt

19: cylinder

19a: Enlarged lower part of cylinder

20: conical enlarged opening

21: step

22: notch groove

23: bent groove

24: auxiliary cylinder

25: nuts

26: washer

27: adhesive

The present invention solves the above problems of the conventional anchor bolt, and even if the thickness of the material such as stone or concrete wall is small, such as about 30 to 80 mm, the anchor bolt is not knocked into the insertion hole and thus inserted. It is for the purpose of providing an anchor installation method and an excavation device for the insertion hole that can be expanded and opened by fastening the bolt end part into the insertion hole simply by rotating and tightening the nut screwed to the bolt without destroying the hole. It is.

Claim 1 of the present invention relates to a method for installing an anchor, and, as a specific means thereof, can be expanded and inserted into an insertion hole by rotating and tightening a nut screwed to a bolt without hitting the anchor into the insertion hole. A method of mounting an anchor, wherein the insertion hole is drilled and installed in the mounting portion of the anchor, and in the insertion hole, the rotary shaft having a conical cutting edge at the lower end thereof is used as the point above the insertion hole. The blade is rotated so as to rotate around the center of the insertion hole in the hole, and an enlarged opening portion is formed at the bottom of the hole of the insertion hole, and then the bolt having a conical enlarged opening portion at the tip is longer than the depth of the insertion hole. A short cylinder and an auxiliary cylinder are fitted onto the cylinder, and an anchor screwed with a nut is fitted into the insertion hole at the upper end thereof. Then, the nut is rotated while the bolt stops rotating, and the cylinder and the auxiliary cylinder are pushed down so that the lower end of the cylinder is enlarged and opened at the conical enlarged opening of the bolt to stop at the hole bottom enlarged opening. Then, while loosening the nut once and removing the auxiliary cylinder from the bolt, rotate the nut to raise the bolt while maintaining the bolt stoppage, and enlarge the bottom enlarged opening of the cylinder at the conical enlarged opening of the bolt. It is characterized in that the crimping to the opening to stop the walk.

The invention of claim 2 relates to an excavation apparatus for an insertion hole used in a method for installing the anchor, wherein the anchor is screwed into the insertion hole by rotating and tightening a nut screwed to the bolt without hitting the anchor into the insertion hole. A device for drilling an anchor insertion hole for use in a method of mounting an anchor that can be hung, wherein the anchor installation portion is provided with a guide opening at the upper end, a bearing support on the upper side, and a rotational movement in the support above the insertion hole. An apparatus frame having a spherical sliding bearing freely supported is arranged coaxially with the anchor insertion hole, and the apparatus frame has a rotating shaft extending from the upper motor through the inside of the spherical sliding bearing and extending into the insertion hole. The lower end of this rotating shaft is provided with a conical cutting edge, and between the motor and the spherical sliding bearing It is characterized in that an external circumferential surface is provided with an inclination adjustment panel for controlling the pivoting motion of the rotary shaft by providing an external appearance that does not receive rotation of the rotary shaft, the outer peripheral surface of which is in contact with the upper guide opening of the mechanism frame.

As for the drilling device for this insertion hole, a configuration in which the inclination adjustment panel provided in the outer appearance between the motor and the spherical sliding bearing is attached so as to be freely slid in the vertical direction with respect to the outer appearance is preferable.

The present invention relates to an anchor for use in an anchor installation method in which an anchor can be hooked into an insertion hole by rotating and tightening a nut screwed to a bolt without hitting the anchor into the insertion hole. A bolt having an enlarged opening portion, a bolt having a step portion for stopping the rotation by being fitted by a tool at the upper end, and a plurality of sections along the length direction at the lower end of the bolt, the length of which is shorter than the depth of the insertion hole. A cylinder is provided with a recess groove, a cylinder provided with a bent groove provided in the circumferential direction so as to be orthogonal to the cut groove, and an auxiliary cylinder having a length shorter than this cylinder is fitted on the cylinder, and a nut is screwed on the upper end. .

In the present invention, first, an insertion hole by a drill is drilled in an installation portion of an anchor such as a stone or concrete wall surface. Next, using an excavation device, a conical hole bottom enlarged opening is formed at the lower end of the insertion hole. Then, the cylinder and the auxiliary cylinder are fitted to the bolt having the conical enlarged opening at the tip, and the nut is screwed on the upper end. An anchored anchor is fitted into the insertion hole.

In this state, when the nut is rotated while the bolt is fixed with a wrench or the like, the cylinder and the auxiliary cylinder are pushed down into the insertion hole so that the lower end of the cylinder is enlarged and opened at the conical enlarged opening of the bolt. Engage in the enlarged opening of the bottom of the hole. Then, when the nut is rotated while the auxiliary cylinder is removed from the bolt while the bolt stops rotating, the bolt rises, and finally the lower end enlarged opening of the cylinder is directed toward the hole bottom enlarged opening by the bolt conical enlarged opening. You can squeeze. Therefore, according to this method, the lower end enlargement opening portion of the bolt or the cylinder can be reliably hung on the hole bottom enlargement opening portion without hitting the rear end of the cylinder or the bolt in the insertion hole.

Embodiment of invention

Next, when the anchor installation method which concerns on this invention is demonstrated about the Example shown in drawing, FIG. 1 shows the digging apparatus 1 of the insertion hole used by this anchor installation method, FIG. Prior to the drilling by the excavation device 1 shown in Fig. 4, first, as shown in Fig. 4, the insertion hole 2 of the anchor portion such as a stone to the predetermined depth by the drill 16 ( 3) is drilled out, and then the enlarged opening portion 4 is formed by the excavation device 1 at the bottom of the hole of the insertion hole 3.

The excavating device 1 includes a guide opening 6 having an inclined surface 6a on the inner circumference of the upper end of the drill insertion hole 3 in the anchor installation portion 2, a bearing support 7 on the inside thereof, The mechanism 5 provided with the spherical sliding bearing 8 which is rotatably supported by the support 7 is arrange | positioned coaxially through the connection end 9 fitted in the anchor insertion hole 3.

Moreover, the motor 10 is arrange | positioned above the mechanism frame 5, The rotating shaft 11 which penetrates into the said spherical sliding bearing 8 from this motor 10, and the lower end extends into the insertion hole 3 is carried out. At the lower end of the rotary shaft 11, a conical cutting edge 12 made of a diamond tip or the like is provided.

An exterior 13 is provided between the motor 10 and the spherical sliding bearing 8 that does not receive rotation of the rotation shaft 11, and the exterior 13 guides the upper end of the frame 5 to the outer circumference. An inclination adjustment panel 15 for controlling the pivoting motion of the rotary shaft 11 having an inclined surface 14 in contact with the opening 6 is provided so as to be able to move up and down along the appearance 13.

The rotating shaft 11 in the insertion hole 3 has the inside of the spherical sliding bearing 8 in the upper part of the insertion hole 3 as the point B, and the lower conical cutting edge 12 is inserted in the hole. The inclined surface 14 of the outer periphery of the inclination adjustment panel 15 is provided so as to pivot around the hole center axis A, and as shown in FIG. 2, the rotating shaft 11 is rotated by the motor 10. Contact with the upper guide opening 6 of the frame 5 and pivot around the point B in the spherical sliding bearing 8 by the conical cutting edge 12 at the lower end of the rotating shaft 11. An enlarged opening 4 is formed at the bottom of the hole of the insertion hole 3.

When the inclination adjustment panel 15 is slid up and down along the exterior 13, the contact angle between the inclination surface 14 of the inclination adjustment panel 15 and the inclination surface 6a of the upper guide opening 6 of the frame is The inclination of the rotating shaft 11 can be adjusted, and the depth of the enlarged opening part 4 can be changed.

FIG. 3 shows the shape of the anchor 17 inserted into the insertion hole 3. The anchor 17 basically consists of a bolt 18 and a cylinder 19. The conical enlarged opening portion 20 is provided at the lower end thereof, and at the same time, the step portion 21 is attached to the upper end by a tool such as a wrench to stop the rotation.

On the outer circumference of the bolt 18, a cylinder 19 having a length shorter than the depth of the insertion hole 3 and an auxiliary cylinder 24 having a length shorter than the cylinder 19 are fitted. A plurality of cutout grooves 22 in the longitudinal direction and a bent groove 23 provided in the circumferential direction so as to be orthogonal to the cutout groove 22 are provided at the lower end of the 19. Furthermore, the washer 26 and the nut 25 are screwed to this bolt 18.

As shown in FIG. 2, after the enlarged opening part 4 is formed in the insertion hole 3 by the excavation apparatus 1 arrange | positioned on the anchor installation part 2, as shown in FIG. After the epoxy resin adhesive 27 is injected into the hole 3, the anchor 17 is inserted as shown in FIG. In addition, the inner diameter of the insertion hole 3 is set to the magnitude | size which can be inserted without having the margin of the outer diameter of the cylinder 19 of the anchor 17 not much.

As shown in Fig. 6, after the anchor 17 is inserted into the insertion hole 3, the nut 21 is attached to the upper end of the bolt 18 with a tool such as a wrench to fix the nut so as not to rotate. Rotating the cylinder 25 causes the cylinder 19 and the auxiliary cylinder 24 to be pushed into the insertion hole 3, and as a result, as shown in FIG. 7, the lower end of the cylinder 19 is enlarged conical of the bolt 18. As shown in FIG. The opening 20 is pushed into a conical shape and enlarged to form an enlarged opening 19a, which is engaged with the enlarged opening 4 at the bottom of the insertion hole 3.

In this state, the lower end enlarged opening portion 19a of the cylinder 19 pushed into the conical shape is engaged into the bottom enlarged opening portion 4 of the insertion hole 3 and the conical enlarged opening portion at the lower end of the bolt 18. As the 20 is engaged inside the cylindrical lower end opening 19a, the bolt 18 is securely fixed in the insertion hole 3, and furthermore, as shown in FIG. Joey performs further processing.

As shown in FIG. 7, after the cylinder 19 and the auxiliary cylinder 24 are pushed down with the nut 25, in that state, the nut 25 is once released from the bolt 18 to form an auxiliary cylinder (on the cylinder 19). When 24 is removed, the cylinder 19 is set to have a length shorter than the depth of the insertion hole 3, so that the upper end of the cylinder 19 is located below the opening end of the insertion hole 3, and the nut 25 ) Can be tightened more tightly.

Therefore, as shown in FIG. 8, in the state where the nut 25 is firmly tightened to a position contacting the upper surface of the anchor installation portion 2, as in the above, the stepped portion 21 of the upper end of the bolt 18 is fitted with a tool. When it is fixed so as not to rotate and the nut 25 is rotated, the bolt 18 rises, and finally, the lower end enlargement opening of the cylinder 19 by the conical enlargement opening 20 of the bolt 18 to be pulled up. 19a is crimped tightly against the hole bottom enlarged opening 4.

In the invention of the anchor installation method, since the enlarged opening is provided in the bottom of the insertion hole in advance, the bolt of the anchor inserted in the insertion hole is fixed so as not to rotate, and the nut is pushed down when the nut is rotated. The enlarged opening piece can be provided at the lower end of the cylinder. Therefore, the lower enlarged opening piece of the cylinder is engaged with the enlarged opening part at the bottom of the hole of the insertion hole, thereby obtaining an anchor with strong drawing resistance.

In this method, since the enlarged opening is provided in the bottom of the insertion hole in advance, it is not necessary to tap the anchor from the outside of the insertion hole, and the bottom of the insertion hole is not destroyed by tapping, so that the thickness is increased. It can be made optimal as a means for providing an anchor in a small stone etc.

In the invention of the excavation device for inserting the insertion hole, the spherical sliding bearing and the inclination adjustment panel provided in the mechanism frame are provided so that the rotation axis from the motor can be rotated with respect to the central axis in the insertion hole. The enlarged opening portion of the desired inclination angle can be easily installed at the bottom.

Furthermore, in the invention of the anchor, by installing a step that can stop the rotation by inserting the tool on the upper end of the bolt, by fixing the bolt without rotating, by pushing the cylinder and the auxiliary cylinder into the hole by the rotation of the nut Since the enlarged opening piece is provided at the lower end of the cylinder, the insertion hole can be reliably eliminated by tapping the cylinder.

In addition, this anchor is used together with the auxiliary cylinder by making the length of the cylinder shorter than the insertion hole, pushing down the cylinder and the auxiliary cylinder by the rotation of the nut, and providing an enlarged opening at the bottom of the cylinder. After installation, the auxiliary cylinder is removed and the bolt is raised by the rotation of the nut, so that the conical enlarged opening at the bottom of the bolt is pulled up to fit firmly inside the enlarged opening at the bottom of the cylinder, so that the nut is finally tightened firmly. As a result, it is possible to confirm whether or not the enlarged opening piece at the lower end of the cylinder is correctly received in the state of being caught in the enlarged opening portion at the bottom of the hole, thereby improving safety.

In addition, by raising the bolt by rotating the nut, the enlarged opening at the bottom of the cylinder can be securely hooked to the enlarged opening at the bottom of the hole, and the bolt can be brought into close contact with the enlarged opening at the bottom of the cylinder. Can be reliably prevented, and an anchor with high tensile strength can be provided.

Claims (4)

A method of installing an anchor that can be enlarged and opened in an insertion hole by rotating and tightening a nut screwed to a bolt without hitting the anchor into the insertion hole. Then, in this insertion hole, the rotary shaft having the conical cutting edge at the lower end is rotated so that the conical cutting edge pivots around the insertion hole central axis in the hole, with the upper portion of the insertion hole as the point. An enlarged opening portion is formed at the bottom of the hole of the insertion hole, and then a bolt having a conical enlarged opening portion at the tip is fitted with a cylinder having a length shorter than the depth of the insertion hole, and an auxiliary cylinder is fitted on the cylinder. A screwed anchor is inserted into the insertion hole, and then the nut is rotated while the bolt is stopped rotating. By pushing down the cylinder and the auxiliary cylinder, the lower end of the cylinder is enlarged and opened by the conical enlarged opening of the bolt, and the hook is extended to the bottom of the hole. Then, once the nut is removed and the auxiliary cylinder is removed from the bolt, the bolt stops rotating. A method of installing an anchor, characterized in that the nut is rotated while raising the bolt, and the bottom enlarged opening of the cylinder is pressed by the hole bottom enlarged opening by the conical enlarged opening of the bolt. A device for drilling an anchor insertion hole for use in an anchor installation method in which an anchor can be hooked into an insertion hole by rotating and tightening a nut screwed to a bolt without hitting the anchor into the insertion hole. Above the insertion hole drilled by the drill, a guide frame at the upper end, a bearing support on the inside and a spherical sliding bearing on which the rotational movement is freely supported on the support are arranged coaxially with the anchor insertion hole, The mechanism frame has a rotating shaft extending from the upper motor into the spherical sliding bearing and extending in a lower end thereof into an insertion hole. A lower end of the rotating shaft is provided with a conical cutting edge between the motor and the spherical sliding bearing. The outer surface is provided on the outer surface of the upper part of the frame, An excavation device for an anchor insertion hole provided with an inclination adjustment panel for contacting the guide opening and controlling the pivoting motion of the rotating shaft. 3. An excavation apparatus for an anchor insertion hole according to claim 2, wherein an inclination adjustment panel provided in an outer appearance between the motor and the spherical sliding bearing is attached so as to be freely slidable in the vertical direction with respect to the outer appearance. An anchor for use in an anchor installation method that can be anchored in an insertion hole by rotating and tightening a nut screwed to a bolt without hitting the anchor into the insertion hole, and having a conical enlarged opening at the bottom thereof. A bolt having a step portion for stopping the rotation by being fitted by a tool at the upper end, a plurality of cutout grooves having a length shorter than the depth of the insertion hole at the outer circumference of the bolt and extending in the longitudinal direction at the lower end thereof, and perpendicular to the cutout groove; An anchor comprising a cylinder provided with a bent groove provided in a circumferential direction, and an auxiliary cylinder having a length shorter than this cylinder on the cylinder, and a nut attached to the upper end.