JP2003159704A - Method for making bore hole for anchor bolt and boring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for making a bore hole for an anchor bolt through which the anchor bolt is firmly fixed with a right strength in an anchor bolt fixing by drawing up a taper bolt. <P>SOLUTION: A taper bolt 9A having a screwed upper part and a lower end expanded into a taper-shape, and a cylindrical sleeve 9B in which the taper bolt is inserted are inserted in a bore hole 8. A lip 9Bb of the cylindrical sleeve 9B is spread by drawing up the taper bolt 9A and fixed to the bore hole 8 by a friction resistance with the bore hole 8. The method for making the bore hole is constituted of the first process to set up a first bore hole 8A of a predetermined depth in a concrete 2, the second process to set up an expanded hole 8B of a predetermined depth in an upper part of a bottom of the first bore hole 8A, and the third process to set up a second bore hole 8C of a predetermined depth from the bottom of the first bore hole 8A. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a hole for an anchor bolt and a drilling device.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Application Laid-Open No. 4-229207 discloses a device for producing a hole having an undercut, which comprises a drill bid holder and a drilling tool held by the drill bid holder. A rotatable sleeve provided with a connection opening for supplying a cooling and cleaning liquid is arranged in the bid holder, and the drilling tool is
In the type in which a drilling head equipped with a diamond strip and an axial through hole opening in the sleeve are provided, the shank of the drilling tool has a stop collar, a drilling head and a stop collar. A cross-section enlargement which tapers towards and approximately corresponds to the diameter of the drilling head, the undercut having a longitudinal groove on the surface of this cross-section enlargement Devices have been proposed for making perforations.

[0003]

The above-described conventional device for producing a perforation having an undercut is a device for providing an undercut portion having an enlarged diameter at the lower end portion of the perforation, and a screw portion is provided on the upper part. For an anchor bolt that is formed and has a taper bolt with a tapered lower end and a tubular sleeve that has a lip portion into which the taper bolt is inserted, the tubular shape of the anchor bolt that is inserted into the bore This is suitable for the case where the sleeve is driven into the hole by a hammer etc. to open the tubular sleeve in the undercut part that is expanded at the lower end of the hole, but pull up the taper bolt to remove the tubular sleeve. There is a problem that it cannot be applied to an object to be opened because the expanded undercut portion is different from the opened position of the tubular sleeve.

It is a first object of the present invention to provide a method of manufacturing a hole for an anchor bolt which can be fixed with an appropriate strength for fixing the anchor bolt by pulling up the taper bolt.

A second object of the present invention is to provide an anchor bolt drilling device which facilitates the production of anchor bolt drilling.

[0006]

In order to achieve the first object, the invention of claim 1 is a taper bolt having a screw portion formed in an upper portion and a lower end portion having a tapered diameter, and the taper bolt. Inserting a cylindrical sleeve into which is inserted into the hole, opening the lip portion of the sleep by pulling up the taper bolt, and anchoring the hole in the hole by frictional resistance with the hole. In the manufacturing method of,
A first procedure for providing a perforation, a second procedure for providing an enlarged diameter hole of a predetermined length above the bottom of the first perforation, and a third procedure for providing a second perforation of a predetermined depth from the bottom of the first perforation. It consists of steps and.

According to the first aspect of the present invention, the concrete is provided with an enlarged perforation of a predetermined length at the upper part of the first perforation having a predetermined depth, and the second perforation part having a predetermined depth from the bottom of the first perforation. After installing the anchor bolt, by pulling up the taper bolt of the anchor bolt to open the tubular sleeve, the tubular sleeve is surely opened at the position of expansion and piercing, so that the anchor bolt can be fixed with a small amount of force. Since the stress on the concrete that accompanies the opening of the cylindrical sleeve can be reduced,
It is possible to perform anchoring work of anchor bolts having an appropriate fastening strength.

In order to achieve the second object,
According to a second aspect of the present invention, a taper bolt having a screw portion formed in an upper portion and a lower end portion having a tapered diameter and a tubular sleeve into which the taper bolt is inserted are inserted into a hole, and the taper bolt is pulled up. In the drilling device for anchor bolt drilling, in which the lip portion of the sleep is opened and fixed to the drilling by frictional resistance with the drilling, a body detachable from the rotating portion of the electric drill and a body of this body A cutter that is detachably screwed to the tip, is configured to have an inner diameter slightly larger than the diameter of the body, and has a stickable tubular body having a protrusion, and an inner diameter slightly larger than the diameter of the tubular body, A movable tubular body is provided with a notch in the longitudinal direction from one end, which has the notch and which has a first engaging portion and a second engaging portion engaging near both ends of the notch. Those were.

According to the second aspect of the present invention as described above, the fixing position of the fixed cylinder attached to the body is adjusted, and the protrusion of the cylinder is engaged with the first engagement portion or the first engagement portion of the movable cylinder. Since the size from the cutter to the moving cylinder can be adjusted by switching to the two engaging parts, the drilling size and the position of the expanded diameter hole can be accurately provided, and the working time can be shortened.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a method of manufacturing a hole for an anchor bolt according to the present invention will be described below with reference to FIGS.

FIG. 1 is a sectional view of concrete showing a work procedure of an embodiment relating to a method of manufacturing a hole for an anchor bolt of the present invention, and FIG. 2 is a sectional view of concrete showing a hole made in this embodiment. 3 is a cross-sectional view of concrete showing a state in which an anchor bolt fixing device equipped with an anchor bolt for fixing to the drill hole produced in this embodiment is attached, and FIG. 4 is an anchor bolt using the anchor bolt fixing device to the drill hole made in this embodiment. It is sectional drawing of the concrete which shows the state which was fixed.

First, the structure of the piercing device 1 and the procedure for piercing the concrete 2 with the piercing device 1 will be described with reference to FIG.

In FIG. 1, a drilling device 1 includes a body 4 which is detachably attached to a rotating portion 3a of an electric drill 3, and the body 4
Cutter 5 which is detachably screwed to the tip of the body and body 4
A cylindrical body 6 having an inner diameter slightly larger than that of the body 4 and being configured to be fixed by a screw 6a even when the body 4 is inserted, and having a cubic protrusion 6b having a predetermined size of about 2 mm.
And a notch 7a having an inner diameter slightly larger than the diameter of the tubular body 6 and guiding the projection 6b from one end in the longitudinal direction, and a first engaging portion for engaging the projection 6b in the vicinity of both ends of the notch 7a. 7b and the movable cylinder body 7 having the second engagement portion 7c. Here, the first engaging portion 7b and the second
The interval between the engaging portions 7c is, for example, 15 mm.

Next, the operation of piercing the concrete 2 will be described using the piercing apparatus 1 having such a configuration.

First, in a state in which the movable cylinder 7 of the punching device 1 is moved to the cutter 5 side and the projection 6b is engaged with the first engaging portion 7b, the electric drill 3 is rotated as a first procedure. ,
While abutting and pressing the cutter 5 against the concrete 2, the first perforation 8A having a predetermined dimension from the tip of the cutter 5 to the moving cylinder 7 is provided. Here, the dimension from the tip of the cutter 5 to the movable cylinder 7 is the length of a cylindrical sleeve 9B of the anchor bolt 9 described later, which is, for example, 5
Having a dimension slightly longer than 0 mm, for example 60 mm,
The depth of the first perforation 8A is about 60 mm.

Next, the moving cylinder 7 is placed on the surface of the concrete 2.
When the blades come into contact with each other, as a second procedure, the rotating cutter 5 is moved upward by a predetermined dimension while being swung in the direction A about the contact position between the moving tubular body 7 and the concrete 2 a plurality of times so that the rotating cutter 5 can move the first perforation 8A. An enlarged diameter portion 8B, which is an enlarged diameter hole that is larger in diameter than the first perforation 8A, is formed at the lower end portion.

Next, as a third procedure, the movable cylinder 7 of the punching device 1 is moved to the electric drill 3 to engage the projection 6b with the second engaging portion 7c, and the movable cylinder from the tip of the cutter 5 is moved. The second perforation 8C is provided below the enlarged diameter portion 8B that has been enlarged in the second procedure with the dimension up to 7 being approximately 75 mm. Here, the distance from the tip of the cutter 5 to the moving cylinder 7 is about 75 m.
As for m, a taper bolt 9A described later, which is inserted into a cylindrical sleeve 9B of an anchor bolt 9 described later, is a cylindrical sleeve 9
Approximately 15 mm of the size protruding from the lower end of B
The dimensions are calculated by adding mm.

The depth of the first perforation 8A and the second perforation 8C
The depth of about 60 mm or about 75 mm changes depending on the wear of the cutter 5, but the position where the tubular body 6 is attached to the body 4 may be adjusted.

Further, the drilling device 1 is used for the concrete 2, the anchor bolt 9 is inserted and fixed in the drilling hole 8 provided in the first to third procedures, the fixing device 10 for fixing the anchor bolt 9, and the fixing. A method of fixing the anchor bolt 9 using the device 10 will be described with reference to FIGS. 3 and 4.

In FIGS. 3 and 4, the anchor bolt 9 fixed to the hole 8 comprises a taper bolt 9A and a cylindrical sleeve 9B into which the taper bolt 9A is inserted. The taper bolt 9A has a threaded portion 9Aa formed on an upper portion thereof, and a lower end portion thereof has a tapered diameter, and a plurality of slits 9 extending in the axial direction are formed at a lower end portion of the tubular sleeve 9B.
Ba is provided, and a lip portion 9Bb that can open the leg in the radial direction is formed between these slits 9Ba.

Further, a device 10 for fixing the anchor bolt 9
Is a stepped washer 11 having a plurality of outer shapes, and a moving body 12 whose lower end portion is screwed into a screw portion 9Aa of the taper bolt 9A.
The movable body 12 is inserted into the washer 5, and the lower end of the cylindrical body 13 abuts on the washer 5. The nut body 14 abuts on the upper end of the cylindrical body 13 and is screwed onto the upper portion of the movable body 6. Has been done.

The washer 11 is a screw portion 9 of the taper bolt 9A.
A through hole 11A having a diameter slightly larger than the diameter of Aa is provided, and a small diameter portion 11B which is slightly smaller than the inner diameter of the perforation 8 and is inserted into the perforation 8 and a perforation 8 larger than the inner diameter of the perforation 8 are formed.
Of the collar portion 11C placed on the edge of the cylindrical body 13 and another small-diameter portion 11 having a diameter slightly smaller than the inner diameter of the cylindrical body 13 and inserted into the cylindrical body 13.
D and. In addition, these small diameter parts 11
The thickness (vertical dimension) of each of B, the collar portion 11C, and the other small diameter portion 11D is set to 5 mm.

The moving body 12 has a screw hole 12A into which a screw portion 9Aa of the taper bolt 9A is screwed, and a male screw portion 12B extending in the axial direction is formed in the upper portion, and the male screw portion 12B has a screw hole 12A. Pin 12C protruding downward in the radial direction
Is provided. The depth of the screw hole 12A is, for example, 2
It is set to 0 mm, the male screw portion 12A is manufactured by shaving or welding the male screw portion 12A,
The pin 12C is manufactured by welding or screwing a small-diameter cylindrical body.

A long hole 13A for guiding the pin 12C is formed in the cylindrical body 13 in the axial direction, and a scale portion (not shown) indicating the amount of movement of the taper bolt 9A is provided in the vicinity of the long hole 13A. Cylindrical body 1 on the opposite side of this scale
The protruding portion 1 protruding about 20 mm in the radial direction on the outer peripheral portion of
3B, and a handle including a pipe 13C detachably attached to the protruding portion 13B is provided.

Next, a method of fixing the anchor bolt 9 to the hole 8 using the fixing device 10 will be described.

First, one anchor bolt 9 consisting of the taper bolt 9A and the tubular sleeve 9B is attached to the above-mentioned first to third parts.
When fixing in the hole 8 of the concrete 2 produced by the third procedure, first insert the anchor bolt 9 into the hole 8,
The screw portion 9Aa of the taper bolt 9A protruding from the concrete 2 is inserted into the through hole 11A of the washer 11, and the washer 1
Insert the small diameter portion 11B of No. 1 into the perforation 8 to form the collar portion 11C.
Are placed on the edges of the perforations 8. Next, the screw portion 9Aa of the taper bolt 9A protruding from the through hole 11A of the washer 11
After screwing the screw hole 12A at the lower end of the moving body 12 into the screw and tightening it until it cannot be rotated by hand, the pin 12 of the moving body 12
C is projected from the long hole 13A, and the movable body 12 is inserted into the cylindrical body 13, the cylindrical body 13 is placed on the collar portion 11C of the washer 11, and the male screw portion 12B of the movable body 12 is placed.
The nut body 14 is screwed onto the cylindrical body 13 and the nut body 14 is arranged on the cylindrical body 13. Here, the first perforation 8A and the expanded diameter portion 8B
The positional relationship between the drilling 8 including the second drilling 8C and the anchor bolt 9 including the taper bolt 9A and the tubular sleeve 9B is such that the bottom of the taper bolt 9A is located at the bottom of the second drilling 8C and the bottom of the expanded diameter portion 8B. The tip of the tubular sleeve 9B is located in the vicinity.

After the fixing device 10 is set on the anchor bolt 9 in this way, the nut body 14 is manually tightened so that the nut body 14 is brought into contact with the upper end of the cylinder body 13 to project the cylinder body 13. By holding the pipe 13C attached to the portion 13B by hand and supporting it, the cylinder 13 is prevented from rotating together. In this state, use the socket wrench 15 to tighten the nut body 1.
When 4 is tightened, the reaction force is generated in the moving body 12, but since the pin 12C of the moving body 12 is guided by the elongated hole 13A of the cylindrical body 13, the moving body 12 rises without rotating,
The taper bolt 9A is pulled up. At this time, the small-diameter portion 11B of the washer 11 is in contact with the cylindrical sleeve 9B, and the cylindrical body 13 is in contact with the washer 11, so that the cylindrical sleeve 9B is prevented from rising. Since 9A rises, the lip portion 9Ba of the tubular sleeve 9B is radially opened at the position of the enlarged diameter portion 8B of the drilled hole 8 by pressing the portion of the tapered bolt 9A that is enlarged in diameter.

According to this embodiment, when the anchor bolt 9 is fixed to the hole 8, the lip portion 9 of the tubular sleeve 9B is formed.
Since Ba is opened at the position of the expanded diameter portion 8B of the hole 8, work can be easily performed with a small force, and the lip portion 9B
It is possible to reduce the stress on the concrete 2 when a is opened.

[0029]

According to the first aspect of the present invention, the concrete is provided with an enlarged perforation of a predetermined length at the upper part of the first perforation having a predetermined depth, and the second perforation part having a predetermined depth from the bottom of the first perforation. After installing the anchor bolt, by pulling up the taper bolt of the anchor bolt to open the tubular sleeve, the tubular sleeve is surely opened at the position of expansion and piercing, so that the anchor bolt can be fixed with a small amount of force. Since the stress on the concrete due to the opening of the tubular sleeve can be reduced, it is possible to perform the anchoring work of the anchor bolt having an appropriate anchoring strength.

According to the second aspect of the present invention, the fixing position of the fixable cylinder attached to the body is adjusted, and the protrusion of the cylinder is engaged with the first engagement portion or the first engagement portion of the movable cylinder. Since the size from the cutter to the moving cylinder can be adjusted by switching to the two engaging parts, the drilling size and the position of the expanded diameter hole can be accurately provided, and the working time can be shortened.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of concrete illustrating a work procedure according to an embodiment of a method of manufacturing a hole for an anchor bolt of the present invention.

FIG. 2 is a cross-sectional view of concrete showing perforations produced in this embodiment.

FIG. 3 is a cross-sectional view of concrete showing a state in which an anchor bolt fixing device equipped with anchor bolts fixed to a drill hole produced in the present embodiment is attached.

FIG. 4 is a cross-sectional view of concrete showing a state in which anchor bolts are fixed to the perforations produced in this embodiment by an anchor bolt fixing device.

[Explanation of symbols]

1 punching device 2 concrete 3 electric drill 4 body 5 cutter 6 cylinder 6a potato screw 6b protrusion 7 Moving cylinder 7a cut 7b First engaging portion 7c Second engaging portion 8 drilling 8A 1st perforation 8B Expansion section 8C 2nd perforation 9 Anchor bolt 9A taper bolt 9B tubular sleeve

Claims (2)

[Claims] 1. A taper bolt having a screw portion formed in an upper portion and a lower end portion having a tapered diameter, and a tubular sleeve into which the taper bolt is inserted are inserted into a hole, and the taper bolt is pulled up to obtain the taper bolt. In a method of manufacturing a hole for an anchor bolt, in which a lip portion of a sleep is opened and fixed to the hole by frictional resistance with the hole, a first step of providing a first hole having a predetermined depth in concrete. And a second procedure of providing a diameter-expanded hole of a predetermined length above the bottom of the first hole, and a third procedure of providing a second hole of a predetermined depth from the bottom of the first hole. A method of manufacturing a hole for a characteristic anchor bolt. 2. A taper bolt having a screw portion formed in an upper portion and a lower end portion having a tapered diameter, and a tubular sleeve into which the taper bolt is inserted are inserted into a perforation, and the taper bolt is pulled up. In a drilling device for anchor bolt drilling, in which the lip portion of the sleep is opened and fixed to the drilling by frictional resistance with the drilling, a body detachable from the rotating part of the electric drill and a tip of this body A cutter that is detachably screwed, a cylindrical body that is configured with an inner diameter that is slightly larger than the diameter of the body, and has a protrusion, and an inner diameter that is slightly larger than the diameter of this cylindrical body, A notch is provided in the longitudinal direction, and the movable cylinder has a notch and a first engaging portion and a second engaging portion that engage with both ends of the notch. And a drilling device for drilling anchor bolts.