JPH08291812A - Anchor bolt, anchor bolt fastening method, and processing method for inner groove in long hole - Google Patents

Abstract

PURPOSE: To improve workability and prevent vibration and noise by holding an anchor bolt in a main body before being used, radially projecting a part of it outward from the main body in being used, providing projecting members independent from the main body, and radially projecting parts of these projecting members outward from the main body in fitted to a prepared hole. CONSTITUTION: An anchor bolt is provided with a hollow cylinder part 10 as a main body, spherical members 14 as projecting members, and extruding means 16, 18 for projecting the spherical members 14. The hollow cylinder part 10 is made of metal and a radial hole part 12 communicating from its internal space to the outer circumference is provided. Before using the anchor bolt, the spherical members 14 are held in the internal space and/or the radial hole part 12 in the hollow cylinder part 10. A rotary screw part 18 is made to rotate for moving the extruding piece 16. A tapered part 17 radially extrudes the spherical members 14 by this movement and parts of the spherical members 14 are projected to the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor bolt for mounting on a wall surface or floor surface of a building, a method for mounting the anchor bolt, and a method for forming a groove in an elongated hole.

[0002]

2. Description of the Related Art An anchor bolt that has been widely used in the past has a hollow cylinder (cylinder) anchor bolt main body provided with a sledge 22 extending in the axial direction thereof, as shown in FIGS. The tapered sesame 24 is fitted in the internal space of the main body. When mounting the anchor bolt on the wall surface, the anchor bolt main body is inserted into a pilot hole on the wall surface (not shown), and the end 20T of the main body 20 on the side without the tapered sesame 24 is moved in the direction indicated by the arrow with a hammer or the like. Hit it. As a result, the tapered sesame 24 becomes the main body 2.
It bites deeply into the inside of 0, so that the sleeve 22 is in an open state and adheres closely to the inner peripheral wall surface of the prepared hole.

[0003]

When the strength of the anchor bolt with respect to the mounting portion, that is, the tensile strength when the conventional anchor bolt is used, is examined, the outer peripheral portion near the tip of the main body 20 (the lower tip in FIG. 8). Are only in contact with the inner circumference of the pilot hole, but when the external force that pulls out the anchor bolt from the pilot hole is applied, the tensile strength is not so high and the surface that lacks reliability is there were. In addition, it is necessary to hit the end of the anchor bolt main body with a hammer or the like at the time of mounting, which requires a large force, and the workability is not good, and there are problems of vibration and noise during the work.

The present invention has been made by paying attention to the above points, and has significantly higher tensile strength, reliability, and good workability as compared with the conventional one, and vibration at the time of work. An object of the present invention is to provide an anchor bolt, an anchor bolt attaching method, and a slotted groove forming method that do not cause noise problems.

[0005]

An anchor bolt according to the present invention is held in a main body before use, and can partially protrude outward from the main body in a radial direction during use, and is independent of the main body. A projecting member is provided so that a part of the projecting member can be projected radially outward from the main body when the projecting member is attached to the prepared hole.

That is, according to the present invention, the main body and the main body are held in the main body before use, and partly projecting outward from the main body in the radial direction during use, and independent of the main body. An anchor bolt having a member and a pushing means for causing a part of the projecting member to project radially outward from the main body is provided.

That is, according to the present invention, a hollow cylinder part having one or more radial holes communicating from the inner space to the outer periphery, and a hollow cylinder part held in the inner space and / or in the radial hole part. The spherical member or the columnar member, and the spherical member or the columnar member is movable in the inner space of the hollow cylinder part from the first position to the second position in the axial direction of the hollow cylinder part. When it is in the first position, the spherical member or the columnar member is located inside the outer periphery of the hollow cylinder portion, and when it is in the second position, the spherical member or the columnar member has a contactable portion. An anchor bolt having a spherical member or a cylindrical member pushing means for pushing the spherical member or the cylindrical member outward in the radial direction so that a part of the member projects outward from the outer periphery of the hollow cylinder portion. There is provided.

According to the present invention, the step of providing a groove portion having a diameter larger than the predetermined diameter at a position axially separated by a predetermined distance from the entrance of the hole having a predetermined diameter of the object to which the anchor bolt is to be attached, An anchor bolt attaching method is provided, which comprises a step of inserting the anchor bolt and a step of projecting a projecting member projecting radially outward from the anchor bolt and engaging the projecting member with the groove portion.

Further, according to the present invention, a rotatable member having a diameter smaller than the predetermined diameter is provided in a long hole having a predetermined diameter, and the vicinity of the center of the bottom portion thereof has a mortar shape. A step of inserting one having a blade portion protruding in the radial direction in the vicinity, and pressing the rotatable member toward the bottom of the oblong hole while rotating the rotatable member so that the rotation center of the rotatable member is the bottom of the oblong hole. An elongated groove inner groove having a step of approaching the center and a step of providing an annular groove on the inner circumference near the tip of the elongated hole by the blade portion in the process in which the center of rotation of the rotatable member approaches the center of the bottom portion of the elongated hole. A processing method is provided.

[0010]

Since the anchor bolt and the method for attaching the anchor bolt according to the present invention have the above-described structure, when the anchor bolt is attached to the prepared hole, the protruding member, preferably the spherical member or the cylindrical member, protrudes outward in the radial direction of the main body, Since it is possible to engage with the groove portion provided in the prepared hole, it is possible to obtain remarkably high tensile strength as compared with the conventional anchor bolt. In addition, at the time of mounting, in order to project the protruding member outward in the radial direction of the main body, it suffices to move the means having the tapered portion in the axial direction of the main body, so instead of hitting with a hammer etc., a screw type or It can be of a slide type, has good workability during installation, and does not cause problems of vibration and noise during work. Further, according to the slotted inner groove processing method of the present invention, the slotted inner groove processing necessary for performing the anchor bolt mounting method of the present invention can be performed with a simple jig.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view showing a first embodiment, which is one of the preferred examples of the anchor bolt of the present invention. The anchor bolt includes a hollow cylinder portion 10 as a main body, a spherical member 14 as a protruding member, and a spherical member 1
It has push-out means 16 and 18 for making 4 protrude. The hollow cylinder portion 10 is made of metal, and is provided with a radial hole portion 12 that communicates from the inner space to the outer periphery.
FIG. 2 is a sectional view taken along the line II-II in FIG. 1. As can be seen from this figure, in this embodiment, the radial hole portion 1 is formed.
Four 2 are provided at equal angular intervals. A spherical member 14 is held in the inner space of the hollow cylinder portion 10 and / or in the radial hole portion 12. The hollow cylinder portion 10 as the main body can be made of, for example, a material known as SUS304, but may be selected depending on the place of use and other conditions.

The pushing means has a pushing sesame 16 and a rotary screw portion 18 connected to the pushing sesame 16. A male screw 18S is cut on the outer periphery of the rotary screw portion 18, and this male screw 18S meshes with a female screw 10S that is cut on at least a part of the inner periphery of the hollow cylinder portion 10 in the axial direction. The pushing sesame 16 and the rotary screw portion 18 rotate together, and are movable in the inner space of the hollow cylinder portion 10 from the first position to the second position in the axial direction of the hollow cylinder portion 10. The first position is in a state before use shown in FIG. 1, and the second position is in a state after use (in use) shown in FIG.

As can be seen from FIGS. 1 and 3, the spherical member 14 pushes the sesame 16 before the anchor bolt is used.
Tapered portion 1 forming a V-shaped groove on the outer periphery of
It touches 7. That is, the spherical member 14 is held in the internal space of the hollow cylinder portion 10 and / or in the radial hole portion 12. In this embodiment, the vicinity of the tapered portion 17 of the extruded sesame 16 is magnetized to attract the iron (steel) spherical member 14 (steel ball) by magnetic force. A hexagonal hole 18A for receiving a hexagonal wrench (not shown) is provided at the upper exposed end of the rotary screw portion 18 in the figure. In order to move the pushing sesame 16 from the first position of FIG. 1 to the second position of FIG. 3, the rotary screw portion 18 is rotated using a hexagon wrench and moved in the arrow direction of FIG. By this movement, the tapered portion 17 of the extrusion sesame 16 pushes the spherical member 14 outward in the radial direction,
In the state of FIG. 3, a part of the spherical member 14 projects outward from the outer periphery of the hollow cylinder portion 10.

In FIG. 3, reference numeral 30 denotes a wall surface as an example of an object to which the anchor bolt is attached. A pilot hole 32 having a predetermined diameter (for example, 20 mm) for inserting an anchor bolt is previously bored in the wall surface 30, and then a predetermined jig is provided at a position apart from the inlet of the pilot hole 32 by a predetermined distance in the axial direction. A groove portion 34 having a diameter larger than a predetermined diameter (for example, 26 mm) is provided. As the predetermined jig for providing the groove portion 34, for example, as shown in FIG. 4, a jig having a blade portion 40 attached near the tip of a spindle 38 rotated by a handle 36 can be used. In addition, in FIG.
42 is a jig body, 43 is a spherical bearing, 44 is a coil spring, and 46 is a spring receiving collar. Blade 40
As the above, when the object to be provided with the prepared hole is concrete, it is preferable to use a diamond blade, a super hard blade or the like. In the example of FIG. 4, the shape of the groove 34 is V-shaped in cross section, but this can be made desired by selecting the shape of the blade to be used according to the application and purpose.

A method of machining a groove in an elongated hole using the jig 42 shown in FIG. 4 will be described. First, a spindle 38 as a rotatable member having a diameter smaller than the predetermined diameter is inserted into the long hole 32 having a predetermined diameter and having a mortar shape near the center of the bottom. The spindle 38 is provided with a blade portion 40 protruding in the radial direction near the tip. When the spindle 38 is inserted into the long hole 32, the blade portion 40 contacts the inner wall of the long hole 32 at the beginning, so that the spindle 3
8 is slightly warped along the axis, and its central axis is displaced (eccentric) from the bottom center 32B of the slot 32. In this state, while rotating the spindle 38, the spindle 38 is pressed toward the bottom portion of the slot 32 to bring the central axis of the spindle 38 close to the bottom center 32B of the slot 32. The central axis of the spindle 38 moves along the mortar surface at the bottom of the elongated hole 32, and the inner periphery near the tip of the elongated hole 32 is cut by the blade portion 40 in the process of approaching the center, and the annular groove 34 is provided. This annular groove 34 is a spherical member 1.
When 4 projects outward in the radial direction, it is for receiving a part of it.

5 and 6 are sectional views showing a second embodiment of the anchor bolt of the present invention. FIG. 5 shows a state before use,
FIG. 6 shows a state after use (in use). In this example, a pushing sesame 16A as a pushing means that causes the spherical member 14 to project is slidable in the inner space of the hollow cylinder portion 10 in the axial direction, and extends from the tip portion (lower end portion in the figure) or the outer peripheral portion thereof. It has an inclined tapered portion 17A. 16C is a snap ring attached near the outer periphery of the rear end (upper end in the drawing) of the sesame 16A. This snap ring 16C does not project outward from the outer diameter of the extrusion sesame 16A when the extrusion sesame 16A is in the first position in FIG. 5, and when the extrusion sesame 16A is in the second position in FIG. It is movable in the radial direction so as to project outward so as to engage with the locking groove portion 19 provided at the position.

In the case of the second embodiment, by pushing the rear end of the sesame 16A which is pushed out from the state shown in FIG. 5, the sesame 16A can be slid into the state shown in FIG. is there. By magnetizing the tapered portion 17A, the spherical member 14 in the state before use in FIG.
Can be held by magnetic force.

In each of the above-described embodiments, the holding of the spherical member 14 before use is made by magnetic force, but it is not limited to this, and it may be fixed by an adhesive or the hollow cylinder portion 10 (10A).
Any of various methods such as sealing the opening of the radial hole portion 12 with an adhesive tape can be used. Although the number of the spherical members 14 is four in each of the above-mentioned embodiments, the number may be more than six, such as six, eight, ten, etc. depending on the required tensile strength, the material of the mounting place, and the like. can do. In the case of each of the above-mentioned examples, it was possible to obtain tensile strength about 10 times or more as compared with the conventional anchor bolt. The diameter of the spherical member 14 varies depending on the size of the anchor bolt, but is 3 mm to 10 mm.
mm is suitable. As the material of the spherical member 14,
It can be selected according to the purpose of use, for example, as shown in the following table.

[0019]

[Table 1]

In the first embodiment shown in FIGS. 1 to 3, the rotary screw 18 is rotated in the opposite direction to the mounting direction,
Since the spherical member 14 can be easily returned to the original position (state of FIG. 1), the anchor bolt can be easily removed. Further, in the case of the second embodiment of FIGS. 5 and 6, the same can be easily done by pulling the snap ring 16C inward in the radial direction and sliding the pushing sesame 16A upward in the drawings.

In each of the above embodiments, a spherical member such as a steel ball is used as the projecting member, but the present invention is not limited to this, and a cylindrical member extending in the radial direction of the hollow cylinder portion 10 or 10A may be used. it can.

[0022]

As described above, since the anchor bolt and the method for attaching the anchor bolt of the present invention have the above-mentioned configuration, the protruding member when attaching the anchor bolt to the prepared hole,
Preferably, the spherical member or the columnar member is projected outward in the radial direction of the main body and can be engaged with the groove portion provided in the prepared hole, so that the tensile strength is remarkably higher than that of the conventional anchor bolt. it can. In addition, at the time of mounting, in order to project the protruding member outward in the radial direction of the main body, it suffices to move the means having the tapered portion in the axial direction of the main body, so instead of hitting with a hammer etc., a screw type or It can be a slide type and has good workability during installation,
There is also an effect that problems of vibration and noise during construction will not occur. In addition, the anchor bolt of the present invention can be easily removed after mounting, when it becomes unnecessary.
Furthermore, according to the slotted inner groove processing method of the present invention, the slotted inner groove processing necessary for performing the anchor bolt mounting method of the present invention can be performed with a simple jig.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state before use of a first embodiment of an anchor bolt of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II in FIG.

FIG. 3 is a cross-sectional view showing a state after use (during use) of the first embodiment of the anchor bolt of the present invention.

FIG. 4 is a cross-sectional view showing a preferred example of a jig for processing a prepared hole for attaching an anchor bolt according to the present invention.

FIG. 5 is a cross-sectional view showing a state before use of a second embodiment of the anchor bolt of the present invention.

FIG. 6 is a cross-sectional view showing a state after use (during use) of the second embodiment of the anchor bolt of the present invention.

FIG. 7 is a cross-sectional view showing a state before using a conventional anchor bolt.

FIG. 8 is a cross-sectional view showing a state after use (during use) of a conventional anchor bolt.

[Explanation of symbols]

10, 10A Hollow cylinder part (main body) 10S Female screw 12 Radial hole part 14 Spherical member (projecting member) 16, 16A Extruding sesame (Spherical member or cylindrical member extruding means) 16C Snap ring 17, 17A Tapered part 18 Rotating screw Part 18A Hexagonal hole 18S Male screw 19 Locking groove part 30 Wall surface (object to which the anchor bolt is to be attached) 32 Prepared hole (oblong hole) 32B Bottom center of elongated hole 34 Groove 36 Handle 38 Spindle 40 Blade 42 Jig body 43 Spherical bearing 44 coil spring 46 spring receiving collar

Claims (8)

[Claims] 1. A main body; and a projecting member which is held in the main body before use and can partially project outward in the radial direction from the main body when in use, and which is independent of the main body. An anchor bolt having a pushing means for causing a part of the member to project radially outward from the main body. 2. A hollow cylinder part having one or more radial holes communicating from the internal space to the outer periphery, and a spherical member held in the internal space of the hollow cylinder part and / or in the radial holes, or A columnar member, and a portion that is movable in the inner space of the hollow cylinder portion from the first position to the second position in the axial direction of the hollow cylinder portion and that can contact the spherical member or the columnar member. And the spherical member or the cylindrical member is located inside the outer periphery of the hollow cylinder portion when in the first position, and a part of the spherical member or the cylindrical member when in the second position. An anchor bolt having a spherical member or a cylindrical member pushing means for pushing the spherical member or the cylindrical member outward in the radial direction so as to project outward from the outer periphery of the hollow cylinder portion. 3. The anchor bolt according to claim 2, wherein the spherical member or cylindrical member pushing means has a tapered portion inclined with respect to the axial direction of the hollow cylinder portion. 4. The spherical member or columnar member pushing means has a columnar portion, and the tapered portion is a wall surface of a V-shaped cross-section groove provided in a circumferential portion of the columnar portion. The described anchor bolt. 5. The anchor bolt according to any one of claims 2 to 4, wherein the spherical member or columnar member pushing-out means has a screw portion meshing with a screw groove formed in the inner wall of the hollow cylinder portion. . 6. The anchor bolt according to claim 2, wherein the spherical member or columnar member pushing means has a magnetized portion. 7. A step of providing a groove portion having a diameter larger than the predetermined diameter at a position axially separated by a predetermined distance from an entrance of a hole having a predetermined diameter of an object to which the anchor bolt is attached, and inserting the anchor bolt into the hole. And a step of projecting a member projecting outward in the radial direction from the anchor bolt and engaging the member with the groove portion. 8. A rotatable member having a diameter smaller than the predetermined diameter in an elongated hole having a predetermined diameter, and having a mortar shape in the vicinity of the center of the bottom portion thereof, the radial member having a diameter smaller than the predetermined diameter. A step of inserting one having a protruding blade portion, and a step of rotating the rotatable member while pressing in the direction of the bottom of the elongated hole, bringing the rotation center of the rotatable member closer to the center of the bottom of the elongated hole. A step of forming an annular groove on the inner circumference of the elongated hole near the tip of the elongated hole in the process in which the center of rotation of the rotatable member approaches the center of the bottom of the elongated hole.