JP5067892B2 - Anchor, its fixing method and fixing structure using the same - Google Patents

Description

  The present invention relates to an anchor for fixing an object to be fixed to a base material such as a base, a wall, or a pillar formed of concrete, mortar, or a block, and a fixing method using the anchor. About.

There are two types of anchors, mechanical anchors and chemical anchors, which are embedded in base materials such as concrete, mortar, blocks, etc. that are embedded in base materials such as walls, pillars, etc. is there.
For example, in (Patent Document 1), as a mechanical anchor, “a pin insertion hole having a narrowed bottom portion at the back of the front end, an openable portion that can be expanded at the front end portion, and a male screw at the rear end portion are provided. There is disclosed a “pin-driving type expansion anchor comprising a cylindrical anchor body provided and a driving pin inserted into a pin insertion hole”.
In addition, (Patent Document 2) describes, as chemical anchors, “an anchor body, an insertion hole drilled in the center of the anchor body, a capsule containing an oxalate aqueous solution built in the insertion hole, and the insertion It is composed of an insert member inserted through a hole, and when the anchor body is driven into a hole for anchoring a base material such as concrete, the capsule is broken and the inner wall of the hole for base material is hardened An anchor having a capsule and a method for constructing the same are disclosed.
(Patent Document 3) mainly describes a means for temporarily fixing a mechanical anchor as follows: “In various types of conventionally known screws, anchors, etc., the restoring force is compressed by insertion into the hole of the mating member at the main point. There is disclosed a “temporary fixing means such as a screw or an anchor” characterized in that an elastic protrusion on the wall is provided.
(Patent Document 4) states that “a thread portion that extends from the base end portion to the body portion is provided on the outer peripheral surface of the anchor, and a thread groove is provided in the axial direction from the base end portion to the tip end portion. It has a tapered part with an enlarged diameter at the front, a shaft part smaller than the outer diameter of the body part following the taper part continues to the body part through the step part, and further has a plurality of slits in the shaft part A resin combined anchor device in which an expansion member is wound and fitted, and an anti-rotation protrusion is provided on the outer peripheral surface of the expansion member is disclosed.
(Patent Document 5) states that “a flange portion formed on the outer periphery of the upper end of the embedded portion, and a female screw portion formed from the upper end of the embedded portion to a predetermined depth in the central portion of the embedded portion in parallel with the longitudinal direction of the shaft core. From the lower end of the buried portion parallel to the longitudinal direction of the shaft core, or an insertion hole formed in the central portion of the buried portion parallel to the longitudinal direction of the shaft core from the lower end of the buried portion to a predetermined height. Temporary fixing female screw portion formed up to a predetermined height, an annular temporary fixing member disposed at the lower end of the embedded portion, and an annular temporary fixing member inserted into the insertion hole or screwed into the temporary fixing female screw portion There is described "anchor characterized by comprising a diameter expanding means for expanding the diameter".
Japanese Utility Model Publication No. 3-75305 JP-A-8-1335026 Japanese Utility Model Publication No. 3-4919 JP 2003-269100 A Japanese Patent Application No. 2005-10191

However, the above conventional techniques have the following problems.
(1) Mechanical anchors such as (Patent Document 1) expand the burial portion, and bring the burial portion directly into contact with the hole wall of the lower hole drilled in the base material, and the friction force thereof. In the case where the pulling strength is insufficient and a high tensile pressure is applied, the anchor comes off together with the structure, resulting in a problem of lack of reliability. In addition, since the buried portion is expanded and fixed by being hit by a person like a pin driving type, there is a problem that the pullout strength is likely to vary and the reliability is lacking. In addition, since the burial portion is directly brought into contact with and fixed to the hole wall of the lower hole, when the lower hole is drilled in the edge or thin part of the base material such as concrete or mortar and the edge empty space is small, the hole wall Cracks and cracks are likely to occur due to the stress generated in the steel, and there is a problem that the strength is insufficient and the reliability and durability are lacking.
(2) Chemical anchors such as (Patent Document 2) are fixed with adhesive strength by filling the outer periphery of the anchor with an adhesive and curing it, and obtain sufficient strength after curing. However, since it takes time to cure, it has a problem of lack of productivity and workability.
(3) The mechanical anchor of (Patent Document 3) is provided with a protruding portion of an elastic body that is compressed by insertion into a hole and exerts a restoring force on the hole wall as a temporary fixing means. The projecting part is shaved or shredded and lacks in reliability, and since the fixing method with the hole is the same as the conventional mechanical anchor, regarding reliability and durability such as strength and variation (Patent Document) It had the same problem as 1).
(4) Since the resin combined anchor device of (Patent Document 4) is also mechanically fixed, it is possible to apply a load to the bolt immediately after construction, but the number of parts is large, the shape is complicated, and the productivity and workability are high. Had the problem of lacking. Also, by providing a rotation stop projection on the outer peripheral surface of the expansion member, the expansion member is prevented from rotating and expanded to contact the inner peripheral surface of the construction hole. When the rotation stop protrusion is scraped or chipped, the expansion member cannot be expanded, resulting in a problem of lack of reliability. Furthermore, the expansion member and the tapered portion are expanded toward the lower side of the perforation, and when trying to pull out the anchor device, a force is applied in the direction of reducing the diameter of the expansion member. It had the problem that.
(5) The technology described in (Patent Document 5) was filed by the applicant of the present application, and is an annular temporary fixing member formed of an elastic body such as polyurethane resin or synthetic rubber, or a soft metal such as lead. Is expanded and temporarily fixed to the base material's pilot hole, so the next process can be performed before the adhesive solidifies, shortening the work period and improving the practicality, and burdening the base material during temporary fixing. It is an anchor with excellent reliability that can prevent cracking of the base material in a place where there is little margin space, but it can obtain a sufficient fixing force without using an adhesive. Therefore, it has been desired to improve reliability and versatility by strengthening the fixing force of the anchor alone.

  The present invention solves the above-described conventional problems, and can be easily and reliably fixed to a base material such as a concrete, mortar, or block, or a base material such as a wall or a pillar, with excellent workability and adhesion. Providing anchors that can be firmly fixed to the base material without using any agent, have excellent reliability, can securely tie the base material to the object to be fixed, have high pullout resistance, and have excellent durability. Fixing method that can fix the anchor easily and reliably, ensuring workability and reliability in the post-process, and construction that can fix the base material and the object to be fixed using it in a short time. The purpose is to provide a fixing structure with excellent productivity and productivity.

The anchor according to the present invention, the lower end side of the body portion is embedded in a base hole formed in a base material such as a concrete, mortar, or block, a base, a wall, a pillar, or the like, fixed, and the base material An anchor that binds to the object to be fixed, a male screw portion formed on the outer periphery of the barrel portion, a flange portion that is screwed to the male screw portion so as to be adjustable in height, and a central portion of the barrel portion A central through-hole drilled in parallel with the longitudinal direction of the shaft core, a diameter-reduced portion tapered toward the lower outer periphery on the lower end side of the body portion, and a cylindrical peripheral wall portion. An annular fixing member disposed on the lower end side of the reduced diameter portion, and a fixing male screw portion formed on the upper end side, and inserted through a through-hole drilled in the center of the annular fixing member. An insertion shaft that protrudes from the central through hole of the body portion and a lower end portion of the insertion shaft that is formed or disposed on the annular A pressing portion that contacts the lower surface of the fixed member and an outer diameter smaller than the outer diameter of the barrel portion, and is screwed to the fixing male screw portion at the upper end portion of the insertion shaft and locked to the upper end surface of the barrel portion And a diameter expanding means having a fixing nut portion.

  The outer diameter of the insertion shaft is formed to be smaller than the hole diameter of the central through hole, but even if there is a gap between them, the insertion shaft serves as the core material of the body portion to prevent deformation of the body portion Can do.

Here, as the material of the buried portion and the diameter expanding means, it is made of stainless steel, chrome steel, steel, cast steel, cast iron, carbon steel and other metal products such as aluminum alloy, carbon fiber, boron fiber and glass fiber. In addition, an organic or inorganic fiber such as a metal fiber and a synthetic resin molded product are used. In the case of a metal, a rust-proofed one is preferably used. Thereby, it can prevent that an embedding part and a diameter-expansion means rust, and can improve workability | operativity of an assembly or a decomposition | disassembly.
The annular fixing member is made of synthetic resin such as polyurethane resin, epoxy resin, acrylic resin, synthetic rubber such as acrylonitrile butadiene rubber, chloroprene rubber, butyl rubber, ethylene propylene rubber, fluorine rubber, silicone rubber, acrylic rubber, natural rubber, etc. An elastic body such as a product, a soft metal such as lead, or a hard metal such as iron, stainless steel, aluminum, copper, or brass is preferably used.

As the tool fitting part formed on the head of the diameter expanding means, the upper end surface of the head is formed with a concave part such as one letter, ten letters, hexagon or star, or the head has a rectangular or hexagonal outer shape. What formed in polygonal shapes, such as, is used suitably. Thereby, the diameter expanding means can be rotated with a tool such as a screwdriver or a wrench, the diameter expanding means can be easily tightened or loosened, and the diameter expansion amount of the annular fixing member can be adjusted.
Since the diameter of the annular fixing member is increased by rotating the diameter expanding means screwed into the fixing female thread portion, it can be easily deformed with a small force, and the workability is excellent. In particular, when a hard metal is used as the annular fixing member, it can be firmly fixed to the pilot hole, so that sufficient pulling strength can be obtained without using it together with an adhesive. Excellent.
The diameter-expanding means includes a fixing bolt portion inserted through a through-hole formed in the center of the annular fixing member and rotatably held by the fixing female screw portion, and a lower end side of the fixing bolt portion. What has a press part which contact | abutted to the lower surface of the cyclic | annular fixing member is used suitably. The fixing bolt portion and the pressing portion of the diameter expanding means may be formed integrally, or those formed separately may be fixed by pin fitting or welding.

In addition, when tightening the diameter expanding means, by holding the embedded portion, it is possible to prevent co-rotation of the embedded portion of the anchor and excellent workability. As a means for holding the embedded part, an annularly formed tool that presses the upper surface of the collar part so that a tool for rotating the diameter expanding means can be inserted, and a recess or a convex part formed on the upper surface of the collar part are fitted. For example, those that are engaged or engaged with each other and those that are screwed into the female screw portion of the embedded portion are preferably used.
The hole diameter of the central through hole may be the same from the upper end to the lower end of the embedded portion, or according to the outer diameter of the fixing bolt screwed to the female screw portion and the fixing bolt portion of the diameter expanding means screwed to the fixing female screw portion. The upper end side and the lower end side may have different diameters. When a counterbore portion that does not form a female screw is provided between the female screw portion and the fixing female screw portion, a fixing bolt that is screwed to the female screw portion and a fixing bolt that is to be screwed to the fixing female screw portion The head of the part does not interfere, and the anchor can be prevented from being broken. At this time, the hole diameter of the counterbore part is equal to or smaller than the inner diameter of the female screw part, and may be equal to or larger than the inner diameter of the fixing female screw part.

As the annular fixing member, one having a cylindrical peripheral wall portion formed with an inner diameter substantially equal to or larger than the minimum diameter of the reduced diameter portion is preferably used. In addition, when an annular plate is disposed at the lower end of the peripheral wall portion, by inserting the fixing bolt portion of the diameter-expanding means, the annular fixing member is less likely to sway back and forth and from side to side, and the stability of the fixing operation is excellent.
In addition, when a washer is disposed between the annular fixing member and the pressing portion, the annular fixing member can be prevented from rotating together with the pressing portion, and the fixing bolt portion can be smoothly rotated. The annular fixing member can be compressed and expanded in diameter, and the fixing workability is excellent.
When the annular fixing member is formed of an elastic body, the elastic body is wound inside when the diameter of the annular fixing member is increased by disposing a metal thin portion on the inner periphery of the cylindrical peripheral wall portion. It can be smoothly moved along the reduced diameter portion, and the diameter of the annular fixing member can be surely increased with a small force, so that it is excellent in workability and reliability.
Moreover, when a thin part is provided partially by forming a groove on the outer peripheral surface or inner peripheral surface of the annular fixing member, it is easy to deform and has excellent workability.
It is preferable to form a taper part or a circular arc part expanding upwards on the inner periphery of the upper end of the peripheral wall part of the annular fixing member. When the diameter of the annular fixing member is increased by the diameter expanding means, the upper end of the peripheral wall portion of the annular fixing member can be smoothly raised without being caught by the outer peripheral surface of the reduced diameter portion, and the upper end of the peripheral wall portion is thin. This is because it can easily enter between the outer peripheral surface of the buried portion and the inner peripheral surface of the lower hole, and the anchor effect can be enhanced.

The outer diameter of the collar portion is larger than the hole diameter of the lower hole of the base material, and the bottom surface portion of the collar portion is surely locked to the upper surface of the base material when the embedded portion is inserted into the lower hole. Further, when a counterbore having a thickness equal to or greater than the thickness of the collar is formed on the outer periphery of the lower hole, the collar does not protrude from the surface of the base material, and the fixed object can be supported by the entire surface of the base material.
The outer shape of the collar portion may be formed in a polygonal shape such as a rectangular shape, a hexagonal shape, or an octagonal shape in addition to a circular shape. By having at least one pair of parallel parts on the outside, the heel part can be easily grasped with a tool such as a spanner, and when the embedded part is inserted into the pilot hole of the base material or when fixing work by means of expanding the diameter For example, the embedded portion can be held and the workability can be improved.

Functions as a buffer for the adhesive filled between the outer periphery of the buried part and the hole wall of the lower hole when bonding is formed on the outer peripheral surface buried in at least the lower hole of the buried part. While expanding an area, the biting | fitting of the adhesive agent and the outer peripheral surface of an embed | buried part can be improved, and it can fix firmly.
As the protrusions and irregularities, those in which continuous protrusions and discontinuous protrusions are randomly formed, or spiral grooves are preferably used. It should be noted that the width and depth of the concavo-convex portion such as the spiral groove can be appropriately selected according to the type (viscosity) of the adhesive.

The anchor according to the present invention has a configuration in which the diameter expanding means includes an insertion shaft holding portion formed at an upper end portion of the insertion shaft .

The anchor of the present invention has a configuration in which the annular fixing member includes a plurality of divided grooves formed in parallel with the axial direction at the upper end of the peripheral wall portion .

The present invention provides a method of fixing an anchor, and lower hole drilled step of drilling a lower hole in the base material, and an anchor embedding step for inserting the lower end of the body portion of anchors in the lower hole, By holding the insertion shaft of the diameter expanding means of the anchor and rotating the fixing nut portion, the diameter of the annular fixing member is expanded and the outer periphery of the annular fixing member is brought into contact with the hole wall of the lower hole And a fixing process .

Here, in the pilot hole drilling step, a pilot hole is drilled in the base material with a hammer drill, a rotary drill or the like using a cutting edge such as a hammer drill bit, diamond, or a core hole saw of a super steel tip. As a subsequent process of the pilot hole drilling process, it is preferable to perform a pilot hole cleaning process that removes chips and moisture accumulated in the pilot hole with a brush, a blower, or the like. Thereby, it is easy to insert the embedded portion of the anchor into the prepared hole, and the embedded portion can be reliably embedded to a predetermined depth. Moreover, when it has the adhesive filling process filled with an adhesive agent, the outer peripheral surface of an embed | buried part can be covered without an adhesive, and the extraction strength of an anchor can be ensured and reliability can be improved. . When the pilot hole drilling step is performed at a factory or the like in advance, the precision of the pilot hole is excellent, the number of work steps at the site can be reduced, and productivity can be improved.
In the anchor embedding process, the lower end side (a part) of the trunk portion of the anchor is inserted into the pilot hole of the base material and embedded. Since the collar part is screwed to the male thread part of the anchor body so that the height can be adjusted, the collar part can be adjusted by adjusting the position of the collar part according to the depth of the pilot hole. The anchor can be supported by the surface of the base material.

This invention is an anchor fixing method, Comprising: It has the structure provided with the adhesive agent filling process which fills the said hole with an adhesive agent as a pre-process of the said anchor embedding process .
Here, in the above-described pilot hole drilling step, a pilot hole roughening step of roughening the surface by, for example, scraping the hole wall (inner peripheral surface) of the pilot hole with a wire brush or the like may be provided. By roughening the hole wall of the lower hole and forming irregularities, the adhesive filled in the lower hole and the surface of the hole wall of the lower hole are better bitten in the adhesive filling process, and the anchor of the anchor after the adhesive is cured The pullout strength can be effectively improved. The rough surface roughening step may be performed by manually rotating a wire brush or the like, or may be performed by attaching a shaft portion of a wire brush or the like to the tip of a power tool such as a drill and rotating it electrically. .
As an adhesive to be filled in the adhesive filling step, an organic type mainly composed of unsaturated polyester resin, epoxy acrylate resin, vinyl urethane resin, epoxy resin, etc., or an inorganic type mainly composed of Portland cement, alumina cement, etc. An adhesive is preferably used.

The present invention relates to a fixing structure using an anchor, and anchors that are embedded and fixed in the lower hole formed in the base material, which is screwed to the male screw portion of the body portion of the anchor A fixed nut, and the fixed object that is tightly fixed to the base material via the anchor by the fixed nut.

  As described above, according to the anchor of the present invention, the fixing method thereof, and the fixing structure using the anchor, the following advantageous effects can be obtained.

The present invention has the following effects.
(1) Since it has a collar part screwed to the male thread part of the body part so that the height can be adjusted, the anchor is buried inside the pilot hole by selecting the position of the collar part according to the depth of the pilot hole The work can be fixed to the upper surface of the base material, and the upper end of the body can be protruded from the lower hole. An excellent anchor can be provided.
(2) By expanding the diameter of the annular fixing member, the outer periphery of the annular fixing member is brought into contact with the hole wall of the lower hole, so that the hole wall of the lower hole can be evenly pressed by the annular fixing member and surely strong. It is possible to provide an anchor with excellent reliability that can be fixed to the frame.
(3) Since the anchor can be fixed to the pilot hole of the base material by the annular fixing member, when fixing together with the adhesive, other anchors can be fixed without waiting for the adhesive to solidify completely. Thus, it is possible to provide an anchor excellent in workability that can reduce the work time.
(4) When the bottom of the annular fixing member is pressed upward by the pressing portion of the diameter expanding means, the outer periphery of the reduced diameter portion formed by reducing the diameter of the annular fixing member toward the outer periphery on the lower end side of the body portion. In addition, it is possible to provide an anchor excellent in fixing workability that can be smoothly raised along the circumference of the annular fixing member and can surely expand the diameter of the annular fixing member in the outer circumferential direction.
(5) Since the annular fixing member is sandwiched between the trunk portion and the pressing portion of the diameter expanding means, the upper end portion of the annular fixing member is deformed and fixed so as to increase in diameter upward, so that the trunk portion When an external force for pulling out the upper part is applied, a force is applied in the direction of expanding the diameter of the upper end side of the annular fixing member, and it is possible to provide a highly reliable anchor in which the body portion is difficult to come off.
(6) By simply holding the insertion shaft with a tool or the like and rotating the fixing nut portion, it is possible to easily perform the tightening operation of the diameter expanding means, and an annular fixing member disposed at the lower end of the body portion An anchor excellent in workability that can be expanded in the outer circumferential direction can be provided.
(7) By adjusting the tightening force in the fixing nut portion of the diameter expanding means, the diameter expanding amount of the annular fixing member can be easily adjusted, and workability that can ensure a substantially constant pulling strength with little variation, An anchor having excellent reliability can be provided.
(8) The annular fixing member can be raised along the reduced diameter portion simply by rotating the fixing nut portion of the diameter expanding means, and the upper end portion of the annular fixing member is located outside the trunk portion in the vicinity of the upper end of the reduced diameter portion. An anchor excellent in workability can be provided in which the diameter can be expanded larger than the diameter and the anchor can be fixed by bringing the outer peripheral surface into contact with the hole wall of the lower hole.

( 9 ) Since the insertion shaft holding portion formed at the upper end portion of the insertion shaft of the diameter expanding means can be used to easily hold the insertion shaft with a tool, the fixing nut portion is rotated for fixing. In this case, there is provided an anchor excellent in workability and fixing reliability, in which the insertion shaft does not co-rotate and the diameter of the annular fixing member can be reliably expanded and firmly fixed to the pilot hole of the base material. be able to.

( 10 ) The annular fixing member having a plurality of dividing grooves formed in parallel to the axial direction on the upper end side of the peripheral wall portion is easily expanded in the outer peripheral direction by rising along the reduced diameter portion, and It is possible to provide an anchor excellent in workability and reliability that can press-fit the upper end side into the gap between the barrel portion and the lower hole and be firmly fixed, thereby improving the pull-out strength of the barrel portion.

( 11 ) In the anchor embedding step, the anchor embedded portion is inserted and embedded in the lower hole, and in the fixing step, the diameter of the annular fixing member is increased by the diameter expanding means, and the outer periphery thereof is brought into contact with the hole wall of the lower hole. The body part of the body can be securely fixed to the pilot hole of the base material, so even when fixing together with an adhesive, there is no need to wait for the adhesive to solidify. It is possible to provide an anchor fixing method excellent in workability capable of being screwed and fixing an object to be fixed to a base material.

( 12 ) Since there is an adhesive filling step of filling the pilot hole with an adhesive, the outer peripheral surface of the body portion embedded in the pilot hole can be firmly fixed with an adhesive, and the pullout strength of the anchor is improved. Therefore, it is possible to provide a highly reliable anchor fixing method.
( 13 ) Since there is an adhesive filling step of filling the lower hole with an adhesive, the gap between the outer periphery of the trunk and the hole wall of the lower hole can be filled with the adhesive, and rainwater or moisture in the air infiltrates. It is possible to provide an anchor fixing method excellent in reliability and durability that can prevent the corrosion of the trunk portion of the anchor.

( 14 ) Since the anchor is embedded and fixed in a pilot hole drilled in the base material, the object to be fixed is fixed to the base material via the anchor by a fixing nut screwed into the male thread portion of the trunk portion of the anchor. Thus, it is possible to provide a fixing structure using an anchor with excellent reliability that can be tightly fixed.
( 15 ) Since the object to be fixed is fixed to the base material via the anchor by the fixing nut screwed to the male threaded portion of the anchor body, the adhesive filled in the pilot hole when the adhesive is used together It is possible to provide a fixing structure using an anchor excellent in workability capable of proceeding and shortening the work period without moving the object to be fixed even if the agent is not completely cured. it can.
( 16 ) Since the object to be fixed is fixed to the base material via the anchor by the fixing nut screwed to the male threaded portion of the anchor body, it is only necessary to leave it with the adhesive over time. It is possible to provide a fixing structure using an anchor excellent in workability and reliability, in which an adhesive can be changed from an uncured state to a cured state to firmly fix an object to be fixed and a base material.

(A) Sectional view of anchor in Embodiment 1 (b) Perspective view showing an annular fixing member of the anchor in Embodiment 1 Cross-sectional side view of a main part showing a fixing structure using the anchor of the first embodiment (A) Main part sectional view showing a pilot hole drilling process of the anchor fixing method in Embodiment 1 (b) Main part sectional view showing an adhesive filling process of the anchor fixing method in Embodiment 1 (c) Sectional drawing which shows the anchor embedding process of the anchor fixing method according to the first embodiment. (A) Cross-sectional view showing an anchor mounting jig used in the anchor fixing method in the first embodiment (b) Rear view of the anchor mounting jig used in the anchor fixing method in the first embodiment Cross-sectional side view of main parts showing a fixing process of the anchor fixing method in the first embodiment (A) Top view which shows the modification of the anchor attachment jig used for the anchor fixing method in Embodiment 1 (b) The modification of the anchor attachment jig used in the anchor fixation method in Embodiment 1 is shown Cross section (A) Plan view showing an anchor in the second embodiment (b) Cross-sectional view showing the anchor in the second embodiment The rear side perspective view which shows the jig for anchor attachment used for the fixing method of the anchor in Embodiment 2 (A) Plan view of a modification of the anchor in the second embodiment (b) Cross-sectional view of a modification of the anchor in the second embodiment (A) Plan view of anchor in the third embodiment (b) Cross-sectional view of the main part showing the anchor embedding process of the anchor fixing method in the third embodiment (A) Cross-sectional view of an anchor in the fourth embodiment (b) Cross-sectional view showing a fixed state of the anchor in the fourth embodiment (A) Sectional view of anchor in embodiment 5 (b) Exploded perspective view of anchor in embodiment 5 (A) Left side view of the anchor in the fifth embodiment (b) Front view of the anchor in the fifth embodiment (c) Right side view of the anchor in the fifth embodiment, (d) Rear surface of the anchor in the fifth embodiment Figure (A) Plan view of the anchor in the fifth embodiment (b) Bottom view of the anchor in the fifth embodiment (c) Cross-sectional view of the anchor in the fifth embodiment (A) Front view showing a deformed state of the anchor in the fifth embodiment (b) Front view showing a state in which the anchor collar portion in the fifth embodiment is moved. Cross-sectional side view of a main part showing a fixing structure using an anchor in the fifth embodiment The principal part perspective view which shows the fixing process of the anchor fixing method in Embodiment 5 (A) The perspective view of the anchor in Embodiment 6 (b) The exploded perspective view of the anchor in Embodiment 6 (A) Left side view of the anchor in the sixth embodiment (b) Front view of the anchor in the sixth embodiment (c) Right side view of the anchor in the sixth embodiment (d) Rear view of the anchor in the sixth embodiment (A) Plan view of the anchor in the sixth embodiment (b) Bottom view of the anchor in the sixth embodiment (c) Sectional view of the anchor in the sixth embodiment (A) Front view showing a deformed state of the anchor in the sixth embodiment (b) Front view showing a state in which the buttocks of the anchor in the sixth embodiment are moved Cross-sectional side view of main parts showing a fixing structure using anchors in the sixth embodiment The principal part perspective view which shows the fixing process of the fixing method of the anchor in Embodiment 6 Cross-sectional side view of main parts showing a trunk part reinforcing step of the anchor fixing method in the sixth embodiment Cross-sectional view of main parts of the anchor in the seventh embodiment

1, 1a, 1b, 1c, 1d, 41, 51, 51a Anchor 2 embedded part 2a, 44 collar part 2b, 44a taper part 2c spiral groove 2d, 42b central through hole 2e anchor holding concave part 2f anchor holding convex part 2g parallel part 3a, 52e Female thread part 3b Counterbore part 3c, 52c Fixing female screw part 4a, 43 Reduced diameter part 4b Cylindrical part 5 Annular fixing member 5a Peripheral wall part 5b Divided groove 5c Taper part 6 Washer 7, 27, 47, 57 Diameter expansion means 7a Fixing bolt portion 7b Tool fitting portion 7c, 48 Pressing portion 10 Base material 10a Base material surface 11 Lower hole 11a Hole wall 11b Opening peripheral edge portion 12 Adhesive 14 Fixed object 14a Fixing hole 14b Counterbore 15 Washer 16 Fixing bolt 17 Fixing Nut 20, 20a, 35 Anchor mounting jig 21 Non-rotating male screw part 22, 22a Non-rotating head part 22b Sher part 23, 35a Grasping part 23a Supporting protrusion 24 Tool insertion hole 25, 60, 61, 62, 63 Tool 27a Expanded diameter part 30 Protection sheet 30a Insertion hole 30b Taper surface 35b Opening part 35c Back surface 36 Protruding part 42, 52, 52a trunk 42a male thread 42c upper end surface 47a insertion shaft 47b pressing part fixing screw 47c fixing male thread 47d insertion shaft holding part 49 fixing pin 50 fixing nut part 52d trunk holding part 57a fixing bolt shaft 57b tool fitting Part 65 reinforcement member

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1A is a cross-sectional view of the anchor in the first embodiment, and FIG. 1B is a perspective view showing an annular fixing member of the anchor in the first embodiment.
In FIG. 1, 1 is the anchor in the first embodiment, 2 is made of iron products such as stainless steel, chrome steel, steel, cast steel, cast iron, carbon steel, and metal such as aluminum alloy, carbon fiber, boron fiber, and glass. An embedded portion of an anchor 1 molded with organic or inorganic fibers such as fibers and metal fibers and a synthetic resin, 2a is a flange portion formed on the outer periphery of the upper end of the embedded portion 2, and 2b is formed on the lower surface side of the flange portion 2a. The taper portion, 2c is a spiral groove formed on the outer peripheral surface of the embedded portion 2, and 3a is an internal thread formed on the upper end side of the central through hole 2d formed parallel to the longitudinal direction of the shaft core of the embedded portion 2. 3b is a counterbore part of the central through hole 2d where a female screw is not formed between the female screw part 3a and a fixing female screw part 3c described below, and 3c is a fixing female screw part formed on the lower end side of the central through hole 2d. 4a is directed downward on the outer periphery of the lower end side of the embedded portion 2. The diameter-reduced portion 4b is formed in a tapered shape by being reduced in diameter and 4b is a cylindrical portion formed by extending to the lower end side of the reduced-diameter portion 4a, and the upper end portion 5 is disposed on the lower end side of the reduced-diameter portion 4a. Is fixed to the cylindrical portion 4b and held therein, 5a is a peripheral wall portion of the annular fixing member 5, 5b is a plurality of divided grooves formed in parallel to the axial direction from the upper end side of the peripheral wall portion 5a, 5c is A tapered portion formed by expanding upward on the inner periphery of the upper end of the peripheral wall portion 5a, 6 is a washer disposed at the lower end of the annular fixing member 5, and 7 is a fixing bolt portion 7a for fixing the embedded portion 2 A diameter-expanding means 7b that is rotatably held by the female screw part 3c is formed on the head of the fixing bolt part 7a and is fitted with a screwdriver or a tool such as a wrench for rotating the diameter-expanding means 7. One-letter, ten-letter, hexagonal or star-shaped tool fitting part, 7c is disposed on the lower end side of the fixing bolt part 7a and is a washer A pressing portion of the enlarged diameter section 7 for pressing the annular fixing member 5 to the lower surface of the contact.

The outer diameter of the flange portion 2a is formed larger than the diameter of the lower hole of the base material in which the embedded portion 2 is embedded, and the flange portion 2a is surely placed on the upper surface of the base material when the embedded portion 2 is inserted into the lower hole. To be locked. In addition, the outer shape of the collar portion 2a can be formed in a polygonal shape such as a rectangular shape, a hexagonal shape, an octagonal shape or the like other than a circular shape.
A spiral groove 2 c was formed on the outer peripheral surface of the embedded portion 2. This functions as a buffer for the adhesive filled between the outer periphery of the embedded portion 2 and the hole wall of the lower hole, widens the bonding area, and well bites the adhesive and the outer peripheral surface of the embedded portion 2. And can be firmly fixed. In addition to the spiral groove 2c, non-continuous uneven portions may be randomly formed or a plurality of protrusions may be formed. The width and depth of the concavo-convex portion and the protruding portion such as the spiral groove 2c can be appropriately selected according to the type (viscosity) of the adhesive to be used.

Since the counterbore 3b is formed between the female screw 3a and the fixing female screw 3c, the head of the fixing bolt 7a does not protrude toward the female screw 3a of the embedded portion 2, and the female screw 3a The fixing bolt to be screwed and the head of the fixing bolt portion 7a do not interfere with each other, and the anchor 1 can be prevented from being damaged.
In the present embodiment, the hole diameter of the central through hole 2d is such that the upper end side of the embedded portion 2 in which the female screw portion 3a is formed has a large diameter, and the lower end side of the embedded portion 2 in which the fixing female screw portion 3c is formed has a small diameter. However, it can be selected as appropriate according to the diameters of the fixing bolt screwed to the female screw portion 3a and the fixing bolt portion 7a screwed to the fixing female screw portion 3c, and can be the same diameter. .

The material of the annular fixing member 5 includes synthetic resin such as polyurethane resin, synthetic rubber such as butyl rubber and fluorine rubber, elastic body such as natural rubber, soft metal such as lead, or hard metal such as iron and stainless steel, or A combination of these can be used. In particular, the use of a hard metal is preferable because it can be firmly fixed and has excellent durability. In the case where the annular fixing member 5 is formed of an elastic body, a metal thin portion is disposed on the inner periphery of the cylindrical peripheral wall portion 5a, so that it is elastic when the annular fixing member 5 is expanded in diameter. The body can be smoothly moved along the reduced diameter portion 4a without being wound inwardly, and the diameter of the annular fixing member 5 can be surely increased with a small force, thereby being excellent in workability and reliability.
The inner diameter of the peripheral wall portion 5a of the annular fixing member 5 was formed to be substantially the same or slightly smaller than the outer diameter of the cylindrical portion 4b extended to the reduced diameter portion 4a. Thereby, the upper end part of the annular fixing member 5 can be fitted and held in the cylindrical part 4b even in an unused state or a state before fixing. When the annular plate is fixed to the lower end of the peripheral wall portion 5a, when the fixing bolt portion 7a is inserted, the annular fixing member 5 is not easily moved back and forth or left and right, and the stability of the fixing operation can be improved.

A taper portion 5c that expands upward is formed on the inner periphery of the upper end of the peripheral wall portion 5a of the annular fixing member 5. When the embedded portion 2 is embedded in the lower hole, the upper end of the peripheral wall portion 5a can move smoothly without being caught by the outer peripheral surface of the reduced diameter portion 4a, and the upper end side of the peripheral wall portion 5a is thinned so that the embedded portion 2 This is because it is easy to enter between the outer peripheral surface and the inner peripheral surface of the lower hole, and the anchor effect is enhanced. The same effect can be obtained by forming the taper portion 5c in a straight line shape or an arc shape.
The dividing grooves 5b were formed at 2 to 8 places. It is difficult to reliably deform the annular fixing member 5 with only one dividing groove 5b, and the deformation is uneven and the fixation tends to become unstable. As the number of the dividing grooves 5b increases from eight, the annular fixing member 5 and the pilot hole This is because the contact area is reduced, the fixing force is insufficient, and the pulling strength tends to decrease. The number of the dividing grooves 5b is particularly suitable for M8 to M36 fixing bolts that are generally used, and can be appropriately selected according to the outer diameter of the annular fixing member 5.

By disposing the washer 6 between the annular fixing member 5 and the pressing portion 7c of the diameter expanding means 7, the annular fixing member 5 is prevented from rotating together with the diameter expanding means 7. Since the fixing bolt portion 7a can be smoothly rotated, the annular fixing member 5 can be reliably compressed and expanded in diameter, and the fixing workability is excellent.
The fixing bolt portion 7a and the pressing portion 7c of the diameter expanding means 7 may be formed integrally, or those formed separately may be fixed by pin fitting or welding. In addition, the shape of the press part 7c should just be a thing which can press the cyclic | annular fixing member 5, and you may form in shapes, such as an ellipse, a cross, and a letter other than circular.
Since the tool fitting portion 7b is provided, the fixing bolt portion 7a can be easily rotated using a screwdriver or the like.

A fixing structure using the anchor according to the first embodiment formed as described above will be described with reference to the drawings.
FIG. 2 is a cross-sectional side view of an essential part showing a fixing structure using an anchor in the first embodiment.
In FIG. 2, 10 is a base material such as a foundation, wall, or pillar formed of concrete, mortar, or a block, 10a is a base material surface, 11 is drilled perpendicular to the base material surface 10a, and anchor 1 is embedded. The fixed lower hole, 11a is the hole wall of the lower hole 11, 11b is the opening peripheral edge of the lower hole 11 where the tapered portion 2b of the collar 2a of the anchor 1 is locked, and 12 is filled in the lower hole 11 and buried. The organic or inorganic adhesive 14 that fills the space between the spiral groove 2c on the outer peripheral surface 2 and the hole wall 11a of the lower hole 11 is adjusted by aligning the position of the fixing hole 14a with the position of the lower hole 11 of the base material 10. An object to be fixed installed on the base material surface 10 a, 14 b is a counterbore formed on the back surface of the object to be fixed 14, 15 is a washer disposed on the fixing hole 14 a of the object to be fixed 14, and 16 is an object to be fixed 14. Is inserted into the fixing hole 14a and the washer 15 and screwed into the female thread 3a of the anchor 1 It is in a fixing bolt for fixing the object to be fixed 14 and base member 10.
If the counterbore 14b is not formed on the back surface of the fixed object 14, a counterbore is formed on the outer periphery of the lower hole 11 of the base material surface 10a or the anchor 1 is struck into the lower hole 11 The upper surface of the part 2a and the base material surface 10a can be flush with each other. Thereby, there is no unevenness | corrugation in the base material surface 10a, the to-be-fixed object 14 can be reliably supported in the whole surface of the base material surface 10a, and it is excellent in fixing stability.

Based on the fixing structure using the anchor according to the first embodiment configured as described above, the anchor fixing method according to the first embodiment will be described below with reference to the drawings.
FIG. 3A is a cross-sectional view of a main part showing a pilot hole drilling step of the anchor fixing method in the first embodiment, and FIG. 3B is an adhesive filling step of the anchor fixing method in the first embodiment. FIG. 3C is a cross-sectional view of the main part showing the anchor embedding process of the anchor fixing method according to the first embodiment.
First, in the pilot hole drilling step, as shown in FIG. 3A, the pilot hole 11 perpendicular to the base material surface 10a of the base material 10 is drilled using a tool such as a hammer drill. The hole diameter of the lower hole 11 is larger than the outer diameter of the embedded portion 2 and the annular fixing member 5 of the anchor 1 and smaller than the flange portion 2 a of the embedded portion 2. Thereby, in the anchor embedment process in the subsequent step, when the embedded portion 2 of the anchor 1 is inserted into the lower hole 11, the embedded portion 2 and the annular fixing member 5 are caught or scraped by the hole wall 11 a of the lower hole 11. In addition, the anchor 2 can be positioned by engaging the flange 2a of the embedded portion 2 with the base material surface 10a and bringing the tapered portion 2b of the flange 2a into contact with the opening peripheral edge 11b of the lower hole 11. 2 can be stably held in the prepared hole 11 (see FIG. 3C).

Next, as a subsequent process of the pilot hole drilling process, a pilot hole cleaning process is performed in which chips, moisture, and the like accumulated in the pilot hole 11 are removed by a brush, a blower, or the like. Accordingly, the embedded portion 2 of the anchor 1 can be easily inserted into the pilot hole 11 so that the embedded portion 2 can be reliably embedded to a predetermined depth, and the adhesive 12 that is filled in the subsequent adhesive filling step can be used. The outer peripheral surface of the embedded portion 2 can be covered without any spots, the pullout strength of the anchor 1 can be ensured, and the reliability can be improved.
In addition, when the pilot hole drilling step is performed in advance in a factory or the like, the processing accuracy of the pilot hole 11 is excellent, the number of work steps at the site can be reduced, and productivity can be improved.
Moreover, you may provide the roughening process of the rough hole which roughens the surface by shaving the hole wall 11a (inner peripheral surface) of the rough hole 11 with a wire brush etc. in the rough hole drilling process. By mounting and rotating a shaft portion such as a wire brush on a power tool such as a drill, the hole wall 11a of the lower hole 11 can be easily cut. By roughening the hole wall 11a of the lower hole 11 to form irregularities, the adhesive 12 filled in the lower hole 11 and the surface of the hole wall 11a of the lower hole 11 are improved and the anchor after the adhesive is cured The pull-out strength of 1 can be effectively improved.

  Next, in the adhesive filling step, as shown in FIG. 3 (b), the adhesive 12 is filled into the pilot hole 11, and in the anchor embedding step, as shown in FIG. The embedded portion 2 is inserted through the prepared hole 11. By inserting the embedded portion 2 of the anchor 1 into the lower hole 11, the adhesive 12 spreads between the spiral groove 2 c on the outer peripheral surface of the embedded portion 2 and the hole wall 11 a of the lower hole 11 and is filled without a gap. . By forming the spiral groove 2 c on the outer peripheral surface of the embedded portion 2, it is possible to increase the adhesion area and improve the anchor effect after the adhesive 12 is cured.

Next, the anchor mounting jig that is inserted into the anchor in the anchor mounting jig mounting step and holds the anchor in the anchor detent step will be described.
FIG. 4A is a cross-sectional view showing an anchor mounting jig used in the anchor fixing method in the first embodiment, and FIG. 4B is an anchor mounting jig used in the anchor fixing method in the first embodiment. It is a rear view of a tool.
In FIG. 4, reference numeral 20 denotes an anchor mounting jig that is screwed to the female thread portion 3 a of the anchor 1 by a rotation-preventing male thread portion 21 in the anchor mounting jig mounting step, and 22 is an anchor mounting jig that holds the anchor 1 in the anchor rotation stopping process. A detent head 23 formed on the upper part of the non-rotating male screw portion 21 of the mounting jig 20 is formed integrally with the detent head 22 radially outward from the center side of the detent head 22. The holding portion of the anchor mounting jig 20, 23 a is a support protrusion of the anchor mounting jig 20 formed to protrude from the lower surface of the gripping portion 23, and 24 penetrates the non-rotating male screw portion 21 and the non-rotating head portion 22. This is a tool insertion hole for the anchor mounting jig 20 drilled.

Next, the anchor mounting jig mounting step and the fixing step will be described.
FIG. 5 is a cross-sectional side view of an essential part showing a fixing process of the anchor fixing method in the first embodiment.
In FIG. 5, 25 is inserted through the tool insertion hole 24 of the anchor mounting jig 20 and is fitted into a tool fitting portion 7b formed at the head of the fixing bolt portion 7a to rotate the fixing bolt portion 7a. A tool 30 used for the fixing process such as a hexagon wrench is arranged between the upper surface of the flange 2a of the anchor 1 and the bottom surface of the detent head 22 of the anchor mounting jig 20 in the lower hole 11 of the base material 10. A protective sheet made of synthetic resin that prevents the filled adhesive 12 from adhering to the anchor mounting jig 20 when it overflows the base material surface 10 a, and 30 a is formed in the substantially central portion of the protective sheet 30. This is an insertion hole formed with a hole diameter larger than the inner diameter of the female screw part 3a and smaller than the outer diameter of the flange part 2.

First, in the anchor mounting jig mounting step, the protective sheet 30 is sandwiched between the upper surface of the flange 2a of the anchor 1 and the bottom surface of the detent head 22 of the anchor mounting jig 20, and then the female thread portion of the anchor 1 The non-rotating male screw portion 21 of the anchor mounting jig 20 is screwed to 3a.
Since the anchor mounting jig 20 has the gripping portion 23, the gripping portion 23 is manually rotated without using a special tool or the like, so that the female screw portion 3a of the anchor 1 and the anchor mounting jig 20 are prevented from rotating. The male screw portion 21 can be attached and detached.
The shape of the protective sheet 30 is formed in a circular shape or a rectangular shape excellent in productivity, but may be any shape as long as it is larger than the outer diameter of the flange portion 2a and can prevent the adhesive 12 from adhering. By forming the hole diameter of the insertion hole 30a of the protective sheet 30 to be larger than the inner diameter of the female screw portion 3a of the embedded portion 2, the anchor mounting jig 20 can be attached to the female screw portion 3a via the protective sheet 30. In the subsequent fixing step, the fixing bolt portion 7a can be rotated by inserting the tool 25 through the insertion hole 30a.

  In this embodiment, the anchor mounting jig mounting step is performed as a subsequent step of the anchor embedding step. When attaching the anchor mounting jig 20 to the anchor 1 embedded in the lower hole 11, the anchor 1 rotates together if it is to be firmly screwed from the beginning, but in the anchor mounting jig mounting step, It only needs to be fixed lightly. This is because, as will be described later, the rotation direction of the fixing bolt portion 7a in the fixing process of the subsequent process is opposite to the tightening direction of the anchor mounting jig 20, so that by performing the fixing work by the diameter expanding means 7, This is because the anchor mounting jig 20 is also automatically firmly fixed. The anchor mounting jig mounting step can also be performed as a pre-process of the anchor embedding step. When performing the anchor mounting jig mounting step as a pre-process of the anchor embedding step, the gripping portion 23 of the anchor mounting jig 20 is gripped and the embedded portion 2 of the anchor 1 is embedded in the prepared hole 11 in the anchor embedding step. And workability can be improved.

Next, in the fixing step, after the anchor detent step for holding the grip portion 23 of the anchor attachment jig 20 and preventing the anchor 1 from rotating is performed, the tool 25 is inserted into the anchor attachment jig 20. By inserting the tip of the tool 25 into the tool fitting portion 7b formed on the head of the fixing bolt portion 7a through the hole 24 and rotating the fixing bolt portion 7a, an annular shape is formed together with the pressing portion 7c. The fixing member 5 is raised, the peripheral wall portion 5a of the annular fixing member 5 is expanded in the outer peripheral direction along the reduced diameter portion 4a, and the outer periphery is brought into contact with the hole wall 11a of the lower hole 11 to fix the anchor 1. Do. At this time, since the fixing bolt portion 7a is rotated counterclockwise as viewed from above, the anchoring male screw portion 21 of the anchor mounting jig 20 is screwed into the female screw portion 3a of the embedded portion 2 to hold the anchor 1. At this time, the tightening direction of the rotation-preventing male screw portion 21 and the rotation direction of the diameter expanding means 7 are opposite to each other, so that the fixing operation by the diameter expanding means 7 can be performed reliably.
Since the supporting protrusion 23a is projected from the bottom surface of the gripping portion 23 of the anchor mounting jig 20, the gripping portion 23 is pressed against the base material surface 10a of the base material 10 in the anchor detent process and the fixing process. The anchor mounting jig 20 can be held and the workability is excellent.

In particular, when the support protrusion 23a is formed of an elastic body such as synthetic rubber, the bottom surface of the support protrusion 23a is reliably pressed against the base material surface 10a without being affected by irregularities or steps of the base material surface 10a. And the anchor 1 can be prevented from lifting.
In the present embodiment, the grip portion 23 of the anchor mounting jig 20 is formed in one character, but may be formed in a T shape or a cross. Further, instead of forming the supporting protrusions 23a entirely with an elastic body, an elastic body may be attached to the bottom surface formed of metal or the like.
The protective sheet 30 may be removed after the fixing step is completed and the anchor mounting jig 20 is removed, or may be left as it is.
If sufficient fixing strength and pull-out strength can be obtained by forming the annular fixing member 5 from a hard metal or the like, only the mechanical fixing by the annular fixing member 5 is performed and the adhesive filling step is omitted. You can also. At this time, the protective sheet 30 is also unnecessary.

Next, a modified example of the anchor mounting jig will be described.
FIG. 6A is a plan view showing a modification of the anchor mounting jig used in the anchor fixing method in the first embodiment, and FIG. 6B is an anchor used in the anchor fixing method in the first embodiment. It is sectional drawing which shows the modification of the jig | tool for attachment.
The modified example of the anchor mounting jig in FIG. 6 is different from the anchor mounting jig in the first embodiment in that the anchor mounting jig 20a rotates and holds the detent head 22a manually. Instead of having 23, the non-rotating head portion 22a is formed in a hexagonal shape, and the washer portion 22b is fixed to the bottom of the non-rotating head portion 22a.
Since the non-rotating head 22a is formed in a hexagonal shape, the anchor mounting jig 20a can be held with a tool such as a wrench or spanner to prevent the anchor 1 from rotating, and the diameter of the anchor 1 and the anchor 1 can be increased. 7 can be prevented from co-rotating.
Further, by providing the washer portion 22b, the washer portion 22b is brought into contact with the flange portion 2a of the anchor 1 when the anti-rotation male screw portion 21 of the anchor mounting jig 20a is screwed to the female screw portion 3a of the anchor 1. The anchor mounting jig 20a can be reliably and stably fixed to the female thread portion 3a of the anchor 1.

As described above, the anchor according to Embodiment 1 has the following effects.
(1) Since the flange portion 2a is formed on the outer periphery of the upper end of the embedded portion 2, the embedded portion 2 can be held by locking the flange portion 2a to the opening peripheral edge portion 11b of the base material surface 10a. 11, the anchor 1 is not buried, and only the buried portion 2 can be reliably buried in the prepared hole 11, and the anchor 1 can be fixed.
(2) Since the flange portion 2a is provided, when the embedded portion 2 is inserted into the lower hole 11 of the base material 10, the embedded portion 2 can be pushed into the lower hole 11 using the flange portion 2a. Excellent.
(3) The central through hole 2d is formed in the central portion of the embedded portion 2 in parallel with the longitudinal direction of the shaft core, and the female screw portion 3a is formed on the upper end side of the central through hole 2d. Since the fixing bolt 16 can be screwed to the anchor 1 embedded and fixed, the fixing bolt 16 can be inserted into the fixing hole 14a of the fixed object 14 to fix the fixed object 14 to the base material 10. it can.
(4) By having the fixing female screw portion 3c formed on the lower end side of the central through hole 2d, the diameter of the screw can be easily screwed into the fixing female screw portion 3c through the tool 25 from the female screw portion 3a side. The means 7 can be rotated, and the annular fixing member 5 disposed at the lower end of the reduced diameter portion 4a can be expanded in the outer peripheral direction.
(5) Since the outer periphery of the annular fixing member 5 is brought into contact with the hole wall 11a of the lower hole 11 by expanding the diameter of the annular fixing member 5, the annular fixing member 5 uniformly presses the hole wall 11a of the lower hole 11 Can be securely fixed.
(6) Since the anchor 1 can be fixed to the lower hole 11 of the base material 10 by the annular fixing member 5, other than waiting for the adhesive 12 to be completely solidified when fixing together with the adhesive 12. The anchor can be fixed and other work can be performed, the work time can be shortened, and the workability is excellent.
(7) When the buried portion 2 is fixed to the pilot hole 11 of the base material 10 by using the adhesive 12 together with the annular fixing member 5, the tensile strength of the anchor 1 can be improved, and the reliability and durability are excellent. .
(8) Since the diameter of the annular fixing member 5 is increased by screwing the diameter-expanding means 7 into the fixing female screw portion 3c, the tightening force in the fixing female screw portion 3c can be easily managed to control the annular fixing member 5 The amount of diameter expansion can be adjusted, and a substantially constant drawing strength with little variation can be secured.
(9) Since the diameter expanding means 7 is screwed into the fixing female screw portion 3c and the annular fixing member 5 is held between the embedded portion 2 and the diameter expanding means 7, the annular fixing member 5 or It is possible to prevent the diameter expansion means 7 from falling off, and it is easy to handle and excellent in practicality.
(10) Since the lower end side outer periphery of the embedded portion 2 has a diameter-reduced portion 4a that is tapered downward and formed in a taper shape, the annular fixing member 5 is simply reduced by rotating the diameter-enlarging means 7. The upper end portion of the annular fixing member 5 is increased to a diameter larger than the outer diameter of the embedded portion 2 in the vicinity of the upper end of the reduced diameter portion 4a. The anchor can be fixed in contact with the hole wall 11a of the hole 11.
(11) The diameter-reduced portion 4a is reduced in diameter toward the lower end side outer periphery of the embedded portion 2 and formed in a tapered shape, so that the bottom portion of the annular fixing member 5 is pressed upward by the diameter-expanding means 7. In this case, the annular fixing member 5 can be smoothly raised along the outer periphery of the reduced diameter portion 4a, and the annular fixing member 5 can be reliably expanded in the outer peripheral direction, and the fixing workability is excellent.
(12) Since the annular fixing member 5 is disposed on the lower end side of the reduced diameter portion 4a formed in a tapered shape by reducing the diameter downward on the outer periphery on the lower end side of the embedded portion 2, the annular fixing is performed at the time of fixing. The member 5 is deformed so as to increase in diameter upward, and is sandwiched between the embedded portion 2 and the diameter expanding means 7 and is integrally fixed, so that an external force for pulling the embedded portion 2 upward is applied. At this time, force is applied in the direction of expanding the diameter of the upper end side of the annular fixing member 5, and the embedded portion 2 is difficult to be pulled out and is excellent in reliability.
(13) By forming a single-letter, cross-shaped, hexagonal or star-shaped tool fitting portion 7b on the head of the fixing bolt portion 7a, the fixing bolt portion 7a is rotated by a tool 25 such as a screwdriver or a wrench. The fixing bolt portion 7a can be easily tightened or loosened, and the diameter expansion amount of the annular fixing member 5 can be adjusted.
(14) By having the tapered portion 2b formed on the lower surface side of the flange portion 2a, the embedded portion 2 can be easily aligned with the lower hole 11 of the base material 10, and the diameter of the annular fixing member 5 is increased. Since the outer periphery of the annular fixing member 5 can be brought into contact with the lower hole 11 of the base material 10 evenly, the embedded portion 2 can be fixed to the lower hole 11 of the base material 10 more reliably. .
(15) Since the annular fixing member 5 includes a plurality of dividing grooves 5b formed in parallel with the axial direction from the upper end of the peripheral wall portion 5a, the annular fixing member 5 is raised along the reduced diameter portion 4a. The annular fixing member 5 is easily deformed, and the annular fixing member 5 can be surely expanded in the outer peripheral direction with a small force. The workability is excellent, and the upper end portion of the annular fixing member 5 is embedded in the embedded portion 2 and the lower hole 11. And can be firmly fixed by press-fitting into the gap.

The fixing structure using the anchor in the first embodiment has the following action.
(1) Since the anchor 1 is embedded and fixed in the lower hole 11 formed in the base material 10, the fixed object 14 is fixed via the anchor 1 by the fixing bolt 16 screwed to the female thread portion 3 a of the anchor 1. Can be tightly fixed to the base material 10.
(2) Since the fixing object 14 is fixed to the base material 10 via the anchor 1 by the fixing bolt 16 screwed to the female thread portion 3a of the anchor 1, the adhesive 12 filled in the prepared hole 11 is Even if it is not completely cured, the fixed object 14 does not move, the work can be advanced, and the construction period can be shortened.
(3) Since the fixing object 14 is fixed to the base material 10 via the anchor 1 by the fixing bolt 16 screwed to the female thread portion 3a of the anchor 1, the adhesive 12 can be removed over time only by leaving it alone. It hardens | cures, the anchor 1 changes from a temporarily fixed state to a fixed state, and the to-be-fixed object 14 and the base material 10 can be fixed firmly.

The anchor fixing method according to the first embodiment has the following effects.
(1) Since there is a pilot hole drilling step of drilling the pilot hole 11 in the base material 10, the pilot hole 11 can be drilled according to the length of the buried part 2 of the anchor 1, and the buried part 2 Protrusion from the base material surface 10a can be prevented, and the base material 10 and the fixed object 14 can be reliably fixed.
(2) Since there is an adhesive filling step of filling the lower hole 11 with the adhesive 12, the outer peripheral surface of the embedded portion 2 of the anchor 1 fixed to the lower hole 11 can be firmly fixed with the adhesive 12. The pullout strength of the anchor 1 can be improved.
(3) Since there is an adhesive filling step for filling the lower hole 11 with the adhesive 12, the gap between the outer periphery of the anchor 1 and the hole wall 11 a of the lower hole 11 can be filled with the adhesive 12. It is possible to prevent the intrusion of moisture, to prevent the anchor 1 from being corroded, and to improve the durability.
(4) The embedded portion 2 of the anchor 1 is inserted and embedded in the lower hole 11 by the anchor embedding process, and the diameter of the annular fixing member 5 is increased by the diameter expanding means 7 by the fixing process, and the outer periphery of the annular fixing member 5 11a, the embedded portion 2 of the anchor 1 can be securely fixed to the pilot hole 11 of the base material 10, and the embedded portion 2 can be fixed before the adhesive 12 filled in the adhesive filling step is solidified. The fixing bolt 16 can be screwed onto the female screw portion 3 a, and the fixed object 14 can be fixed to the base material 10.
(5) Since the tapered portion 2b is formed on the lower surface side of the flange portion 2a, the center of the lower hole 11 and the center of the anchor 1 are automatically aligned, and the tapered portion 2b is opened to the lower hole 11. Since it abuts on the peripheral edge portion 11b and is stably held, workability in the subsequent process can be improved.
(6) There is an anchor mounting jig mounting step for mounting the anchor mounting jigs 20 and 20a on the female thread portion 3a of the anchor 1 as a pre-process or a post-process of the anchor embedding process, and the fixing process is an anchor mounting jig. Since there is an anchor rotation prevention process that holds the anchors 20 and 20a and prevents the anchor 1 from rotating, when the diameter expanding means 7 is rotated, the diameter expanding means 7 and the embedded portion 2 do not rotate together, and The annular fixing member 5 can be deformed and expanded in diameter, and the anchor 1 can be fixed.
(7) When the anchor mounting jig mounting step of mounting the anchor mounting jigs 20 and 20a on the female thread portion 3a of the anchor 1 is performed as a pre-process of the anchor embedding process, the embedded portion 2 of the anchor 1 in the anchor embedding process Is inserted into the pilot hole 11 of the base material 10, the anchor 1 can be held using the anchor mounting jigs 20, 20a, and the anchor 1 can be embedded easily.
(8) In the anchor mounting jig mounting step, the anchor mounting jig 20 is screwed so that the protective sheet 30 is sandwiched between the flange portion 2a of the anchor 1 and the anchor mounting jig 20, whereby the mother Even when the adhesive 12 filled in the lower hole 11 of the material 10 overflows the base material surface 10a, the adhesive 12 can be prevented from adhering to the anchor mounting jig 1, and the workability and maintenance are excellent.

(Embodiment 2)
FIG. 7A is a plan view showing the anchor in the second embodiment, and FIG. 7B is a cross-sectional view showing the anchor in the second embodiment. Components similar to those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
In FIG. 7, the anchor in the second embodiment is different from that in the first embodiment in that it has two circular anchor holding recesses 2e drilled in the upper surface of the flange 2a of the anchor 1a.

The anchor fixing method in the second embodiment is the same as that in the first embodiment, and only the anchor mounting jig to be mounted on the anchor in the anchor mounting jig mounting step is different, so only the anchor mounting jig will be described. To do.
FIG. 8 is a rear perspective view showing an anchor mounting jig used in the anchor fixing method according to the second embodiment.
In FIG. 8, 35 is an anchor mounting jig used in the anchoring step of the anchor 1a according to the second embodiment, 35a is a gripping portion of the anchor mounting jig 35, and 35b is open to the end of the gripping portion 35a. The opening portion 36 of the anchor mounting jig 35 formed in this manner is a convex portion protruding from the back surface 35c of the anchor mounting jig 35 on both sides of the opening portion 35b and fitted into the anchor holding concave portion 2e of the anchor 1a. is there.

The embedded portion 2 can be held by fitting the convex portion 36 of the anchor mounting jig 35 into the anchor holding concave portion 2e of the anchor 1a. Since only the convex portion 36 is fitted to the anchor holding concave portion 2e, the attachment and detachment is easy and the workability is excellent.
Since the anchor mounting jig 35 has the opening 35b, a tool for rotating the diameter expanding means 7 can be inserted, and when the diameter expanding means 7 is rotated and fixed, the embedded section 2 rotates together. The diameter of the annular fixing member 5 can be expanded without fail. Further, when the male screw such as the fixing bolt 13 is screwed into the female screw portion 3a, the embedded portion 2 can be held to prevent co-rotation, so that the female screw portion 3a and the male screw such as the fixing bolt 13 are securely and firmly fixed. can do. In particular, since a part of the opening 35b of the anchor mounting jig 35 is opened sideways, the anchor mounting jig can be easily operated from the side even after a male screw such as a fixing bolt 13 is screwed to the anchor 1a. The tool 35 can be removed and the workability is excellent.
The anchor 1a can be fixed using the anchor mounting jig 20 or 20a as in the first embodiment.

FIG. 9A is a plan view of a modification of the anchor in the second embodiment, and FIG. 9B is a cross-sectional view of a modification of the anchor in the second embodiment.
The modification of FIG. 9 differs from the anchor in the second embodiment in that the anchor 1b has an anchor holding convex portion 2f protruding from the upper surface of the flange portion 2a instead of the anchor holding concave portion 2e.
By forming a pair of parallel portions on the outside of the anchor holding convex portion 2f, the opening portion 35b of the anchor mounting jig 35 or the like is engaged or fitted on the outside of the anchor holding convex portion 2f to thereby embed the embedded portion 2. It can hold | maintain and can fix like the anchor 1a of Embodiment 2. FIG.
In the present embodiment, a pair of parallel portions is formed outside the anchor holding convex portion 2f. However, the anchor holding convex portion 2f may be formed in a rectangular shape, a hexagonal shape, etc. These protrusions may be formed in a protruding manner.

As described above, the anchor according to the second embodiment has the following operation in addition to the operation of the first embodiment.
(1) By having at least one of the anchor holding concave portion 2e drilled in the upper surface of the flange portion 2a or the anchor holding convex portion 2f protruding from the upper surface of the flange portion 2a, the anchor holding concave portion 2e The embedded portion 2 can be held by an anchor mounting jig 35 provided with an opening 35b fitted or engaged with the fitting convex portion 36 or the anchor holding convex portion 2f, and the diameter expanding means 7 is rotated. Thus, when the fixing is performed, the embedded portion 2 does not rotate together, the diameter of the annular fixing member 5 can be reliably increased, and the base material 10 can be firmly fixed to the lower hole 11.
(2) Since the anchor holding recess 2e and the anchor holding projection 2f are provided on the upper surface of the flange portion 2a, the anchor holding recess 2e and the anchor holding projection can be used even when a male screw such as the fixing bolt 13 is screwed to the female screw 3a. By holding the portion 2f, it is possible to prevent the embedded portion 2 from rotating together, and the female screw portion 3a and the male screw such as the fixing bolt 13 can be securely and firmly fixed.

(Embodiment 3)
FIG. 10A is a plan view of the anchor according to the third embodiment, and FIG. 10B is a cross-sectional view of the main part showing the anchor embedding step of the anchor fixing method according to the third embodiment. In addition, the thing similar to Embodiment 1 and 2 attaches | subjects the same code | symbol, and abbreviate | omits description.
In FIG. 10, the anchor in the third embodiment is different from the first and second embodiments in that the outer shape of the flange 2a of the anchor 1c is not circular, and instead of the anchor holding recess 2e and the anchor holding protrusion 2f, the hook 2a It is a point which has a pair of parallel parts 2g formed in a part of the outside of the.
As a result, it is possible to hold the embedded portion 2 by engaging a general-purpose tool such as a spanner with the parallel portion 2g of the flange portion 2a without using a dedicated anchor mounting jig 20, 20a, 35, etc. The anchor 1 can be fixed in the same manner as the anchor 1 in the first embodiment or the anchors 1a and 1b in the second embodiment.
In the present embodiment, the pair of parallel portions 2g is formed outside the flange portion 2a. However, the outer shape of the flange portion 2a may be formed in a rectangular shape, a hexagonal shape, or the like.

Next, an anchor fixing method according to the third embodiment will be described.
In FIG. 10, the anchor fixing method in the third embodiment is different from that in the first or second embodiment, in the anchor embedding process, between the lower surface of the flange portion 2a of the anchor 1c and the base material surface 10a. This is the point that is arranged. In this case, the embedded portion 2 can be easily inserted by forming the insertion hole 30a of the protective sheet 30 to have a hole diameter equal to or larger than the outer diameter of the embedded portion 2 of the anchor 1c.
Since the protective sheet 30 is formed of soft synthetic rubber, synthetic resin, or the like, the peripheral edge of the insertion hole 30a is deformed so as to follow the tapered portion 2b of the flange portion 2a, and the flange portion 2a and the protective sheet 30 are formed by the tapered surface 30b. It is possible to prevent the adhesive 12 from overflowing from the gap between the outer periphery of the embedded portion 2 and the insertion hole 30a to the surface side of the protective sheet 30, and the workability is excellent. In addition, you may form the taper surface 30b in the insertion hole 30a periphery of the protection sheet 30 previously according to the taper part 2b of the collar part 2a.
Moreover, since the overflow of the adhesive agent 12 can be confirmed visually when the protective sheet 30 is formed of a transparent or translucent material, the filling failure of the adhesive agent 12 can be prevented and the reliability is excellent. .
The anchor 1c can be fixed using the anchor mounting jig 20 or 20a as in the first embodiment.

As described above, the anchor according to the third embodiment has the following operation in addition to the operation of the first or second embodiment.
(1) By having at least one pair of parallel parts 2g outside the collar part 2a, the collar part 2a can be easily grasped with a tool such as a spanner, and the embedded part 2 is inserted into the lower hole 11 of the base material 10. The embedded portion 2 can be fixed at the time of fixing by the diameter expanding means 7, and versatility and workability can be improved.

According to the anchor fixing method in the third embodiment, in addition to the operation in the first embodiment, the following operation is provided.
(1) In the anchor embedding step, the protective sheet 30 is disposed between the lower surface of the flange portion 2a of the anchor 1c and the base material surface 10a, whereby the adhesive 12 filled in the pilot hole 11 of the base material 10 and overflowed. Can be prevented from adhering to the vicinity of the surface of the flange portion 2a and is excellent in workability. In particular, the tapered surface 30b is formed at the periphery of the insertion hole 30a of the protective sheet 30, so that the protective sheet 30 can be closely adhered to the tapered portion 2b of the flange portion 2a, and the outer periphery of the embedded portion 2 and the insertion hole 30a. The adhesive 12 can be prevented from overflowing from the gap to the surface side of the protective sheet 30 and is excellent in reliability.

(Embodiment 4)
FIG. 11A is a cross-sectional view of the anchor according to the fourth embodiment, and FIG. 11B is a cross-sectional view illustrating a fixed state of the anchor according to the fourth embodiment. In addition, the thing similar to Embodiment 1 thru | or 3 attaches | subjects the same code | symbol, and abbreviate | omits description.
In FIG. 11, the anchor in the fourth embodiment is different from that in the first embodiment in that the annular fixing member 5 of the anchor 1d is arranged upside down from that in the first embodiment and the diameter expanding means 27 is for fixing. This is a point having a substantially frusto-conical diameter-enlarged portion 27a which is formed in the lower end side of the bolt portion 7a so as to expand in diameter downward and is fitted inside the peripheral wall portion 5a of the annular fixing member 5.

The anchor fixing method in the fourth embodiment is the same as that in the first embodiment, and only the manner of deformation of the annular fixing member 5 in the fixing step is different.
In the fixing process, after the anchor detent process for preventing the rotation of the anchor 1d by the anchor mounting jig 20 or 20a is performed, the tool 25 is inserted from the tool insertion hole 24 of the anchor mounting jig 20 for fixing. The tip of the tool 25 is fitted to the tool fitting portion 7b formed on the head of the bolt portion 7a, and the fixing bolt portion 7a is rotated to raise the enlarged diameter portion 27a. The diameter of the peripheral wall 5a is increased in the outer peripheral direction along the enlarged diameter portion 27a, and the outer periphery is brought into contact with the hole wall 11a of the lower hole 11 to fix the anchor 1d.

  The anchor holding recess 2e and the anchor holding projection 2f similar to those of the second embodiment are provided on the upper surface of the flange 2a of the anchor 1d, or a part of the outer side of the flange 2a is provided as in the third embodiment. A pair of parallel portions 2g may be formed. At this time, in the same manner as in the second embodiment or the third embodiment, in addition to the anchor mounting jigs 20 and 20a, a general tool such as an anchor mounting jig 35 or a spanner is used to perform the anchor detent process and the fixing process. It can be carried out.

  As described above, the anchor and the fixing method thereof according to the fourth embodiment have the same functions as those of the first to third embodiments.

(Embodiment 5)
12 (a) is a perspective view of the anchor in the fifth embodiment, FIG. 12 (b) is an exploded perspective view of the anchor in the fifth embodiment, and FIG. 13 (a) is an exploded perspective view of the anchor in the fifth embodiment. FIG. 13B is a left side view, FIG. 13B is a front view of the anchor in the fifth embodiment, FIG. 13C is a right side view of the anchor in the fifth embodiment, and FIG. 14A is a rear view of the anchor in the fifth embodiment, FIG. 14A is a plan view of the anchor in the fifth embodiment, FIG. 14B is a bottom view of the anchor in the fifth embodiment, and FIG. c) is a cross-sectional view of the anchor in the fifth embodiment, FIG. 15 (a) is a front view showing a deformed state of the anchor in the fifth embodiment, and FIG. 15 (b) is a view of the anchor in the fifth embodiment. When the buttocks are moved It is a front view showing. In addition, the thing similar to Embodiment 1 thru | or 4 attaches | subjects the same code | symbol, and abbreviate | omits description.
12 to 15, reference numeral 41 denotes an anchor according to the fifth embodiment, 42 denotes an iron product such as stainless steel, chrome steel, steel, cast steel, cast iron, carbon steel, or a metal such as an aluminum alloy, carbon fiber, or boron fiber. The body of the anchor 41 molded with organic or inorganic fibers such as glass fiber or metal fiber and synthetic resin, 42a is a male thread formed on the outer periphery of the body 42, and 42b is the core of the body 42. A central through-hole drilled in parallel with the longitudinal direction, 42c is the upper end surface of the barrel portion 42, 43 is a reduced-diameter portion formed in a tapered shape by reducing the diameter toward the outer periphery on the lower end side of the barrel portion 42, 44 Is a flange portion screwed to the male screw portion 42a of the barrel portion 42 so as to be adjustable in height, 44a is a tapered portion formed on the lower surface side of the flange portion 44, 47 is a diameter expanding means of the anchor 41, 47a is a central through hole 42b is inserted and the upper end is the central through hole An insertion shaft of the diameter-expanding means 47 protruding from 2b, 47b is formed at the lower end portion of the insertion shaft 47a, and a pressing portion fixing screw portion into which a pressing portion 48 described later is screwed, and 47c is formed at the upper end side of the insertion shaft 47a. The fixed male screw portion 47d is an insertion shaft holding portion formed by a pair of parallel portions at the upper end portion of the insertion shaft 47a, and 48 is screwed to the pressing portion fixing screw portion 47b at the lower end portion of the insertion shaft 47a. The pressing portion 49 of the diameter expanding means 47 disposed in contact with the lower surface of the annular fixing member 5, 49 is a fixing pin that penetrates the insertion shaft 47a from the side portion of the pressing portion 48 and fixes the pressing portion 48, and 50 is the insertion shaft 47a. This is a fixing nut portion of the diameter expanding means 47 screwed to the fixing male screw portion 47c at the upper end portion thereof and locked to the upper end surface 42c of the body portion 42.

The outer diameter of the flange portion 44 is formed to be larger than the diameter of the lower hole of the base material in which the trunk portion 42 is embedded, and is surely formed on the lower surface side of the flange portion 44 when the barrel portion 42 is inserted into the lower hole. The tapered portion 44a is locked to the upper surface of the base material. The outer shape of the collar portion 44 can be formed in a polygonal shape such as a rectangular shape, a hexagonal shape, an octagonal shape or the like in addition to a circular shape.
The pressing portion 48 of the diameter expanding means 47 is screwed into the pressing portion fixing screw portion 47b of the insertion shaft 47a and then inserted into the fixing pin 49, thereby preventing rotation and preventing the insertion shaft 47a from coming off. The insertion shaft 47a and the pressing portion 48 may be fixed by welding or the like instead of being fixed by the fixing pin 49, or may be integrally formed from the beginning.
The insertion shaft holding portion 47d of the insertion shaft 47a is formed by a pair of parallel portions, but the shape is not limited to this embodiment, and any shape can be used as long as it can be held by a tool. For example, a concave portion such as a single letter, a cross, a hexagon or a star may be formed on the head of the insertion shaft 47a, or the outer shape of the head may be formed in a polygonal shape such as a square or a hexagon.

A fixing structure using the anchor according to the fifth embodiment formed as described above will be described with reference to the drawings. In addition, the thing similar to Embodiment 1 thru | or 4 attaches | subjects the same code | symbol, and abbreviate | omits description.
FIG. 16 is a cross-sectional side view of an essential part showing a fixing structure using an anchor in the fifth embodiment.
In FIG. 16, reference numeral 17 denotes a fixing nut that is screwed into the male screw portion 42 a of the trunk portion 42 of the anchor 41 inserted through the fixing hole 14 a of the fixed object 14 and fixes the base material 10 and the fixed object 14.

Based on the fixing structure using the anchor in the fifth embodiment configured as described above, the anchor fixing method in the fifth embodiment will be described below with reference to the drawings. In addition, the thing similar to Embodiment 1 thru | or 4 attaches | subjects the same code | symbol, and abbreviate | omits description.
Since the pilot hole drilling step and the adhesive filling step in the anchor fixing method in the fifth embodiment are the same as those in the first embodiment, only the fixing step will be described.
FIG. 17 is a main part perspective view showing a fixing step of the anchor fixing method according to the fifth embodiment.
17, 60 is a tool such as a spanner that is engaged with the insertion shaft holding portion 47d and holds the insertion shaft 47a of the diameter expanding means 47, 61 is a spanner that rotates the fixing nut portion 50 of the diameter expanding means 47, and the like. It is a tool.
In the fixing step, the insertion shaft 47 a is raised with respect to the body portion 42 by rotating the fixing nut portion 50 with the tool 61 in a state where the insertion shaft 47 a is fixed with the tool 60. Accordingly, the annular fixing member 5 can be raised together with the pressing portion 48 disposed at the lower end portion of the insertion shaft 47a, and the peripheral wall portion 5a of the annular fixing member 5 expands in the outer peripheral direction along the reduced diameter portion 4a. The anchor 41 is fixed with the outer periphery abutting against the hole wall 11a of the lower hole 11 (see FIG. 16).

As described above, the anchor according to Embodiment 5 has the following effects.
(1) Since it has the collar part 44 screwed to the external thread part 42a formed in the outer periphery of the trunk | drum 42 so that height adjustment is possible, the position of the collar part 44 is selected according to the depth of the lower hole 11. As a result, the anchor 41 is not buried in the lower hole 11, and the collar portion 44 is locked to the base material surface 10 a of the base material 10, and the upper end side of the trunk portion 42 is held so as to protrude from the lower hole 11. The anchor 41 can be fixed.
(2) The upper end side of the body portion 42 protruding from the lower hole 11 is inserted into the fixing hole 14a of the fixed object 14, and the fixing nut 17 is screwed into the male screw portion 42a formed on the outer periphery of the body portion 42. By doing so, the fixed object 14 can be fixed to the base material 10.
(3) Since the outer diameter of the annular fixing member 5 is brought into contact with the hole wall 11a of the lower hole 11 by expanding the diameter of the annular fixing member 5, the annular fixing member 5 presses the hole wall 11a of the lower hole 11 evenly. Can be securely fixed.
(4) Since the anchor 41 can be fixed to the lower hole 11 of the base material 10 by the annular fixing member 5, other than waiting for the adhesive 12 to be completely solidified when fixing it together with the adhesive 12. The anchor can be fixed and other work can be performed, the work time can be shortened, and the workability is excellent.
(5) When the body portion 42 is fixed to the pilot hole 11 of the base material 10 by using the adhesive 12 together with the annular fixing member 5, the tensile strength of the anchor 41 can be improved, and the reliability and durability are excellent. .
(6) Of the male screw portion 42 a formed on the outer periphery of the body portion 42, the portion embedded in the lower hole 11 has an adhesive 12 between the outer periphery of the body portion 42 and the hole wall 11 a of the lower hole 11. It functions as a buffer when filled, and the adhesive area can be expanded, and the biting between the adhesive 12 and the outer peripheral surface of the body portion 42 can be improved and firmly fixed.
(7) Since the diameter-reduced portion 43 of the body portion 42 is reduced in diameter toward the lower end on the outer periphery on the lower end side and formed in a tapered shape, the bottom portion of the annular fixing member 5 is moved by the pressing portion 48 of the diameter-expanding means 47. When pressed upward, the annular fixing member 5 can be smoothly raised along the outer periphery of the reduced diameter portion 43, and the annular fixing member 5 can be surely expanded in the outer peripheral direction, so that the fixing workability is improved. Excellent.
(8) Since the annular fixing member 5 is disposed on the lower end side of the reduced diameter portion 43 which is reduced in diameter toward the lower end side outer periphery of the body portion 42 and formed in a tapered shape, the annular fixing member 5 is fixed at the time of fixing. The member 5 is deformed so as to increase in diameter upward, and is sandwiched between the body portion 42 and the pressing portion 48 of the diameter expanding means 47 so as to be integrally fixed, so that the body portion 42 is pulled out upward. When an external force is applied, a force is applied in the direction of increasing the diameter of the upper end side of the annular fixing member 5, and the barrel portion 42 is difficult to come off and has excellent reliability.
(9) The diameter expanding means 47 is inserted into the central through hole 42b and the upper end portion protrudes from the central through hole 42, and the lower end portion of the insertion shaft 47a is disposed on the lower surface of the annular fixing member 5. Since the pressing portion 48 and the fixing nut portion 50 screwed to the fixing male screw portion 47c formed on the upper end side of the insertion shaft 47a and locked to the upper end surface 42c of the body portion 42 are provided, the insertion shaft 47a is provided. By holding and rotating the fixing nut portion 50, the pressing portion 48 rises together with the insertion shaft 47 a with respect to the body portion 42, and the annular fixing member 5 disposed at the lower end of the reduced diameter portion 43 is moved in the outer circumferential direction. The diameter can be increased.
(10) Since the diameter of the annular fixing member 5 is increased by rotating the fixing nut portion 50 screwed into the insertion shaft 47a of the diameter expanding means 47, the tightening force of the fixing nut portion 50 is managed. Thus, the diameter of the annular fixing member 5 can be easily adjusted, and a substantially constant drawing strength with little variation can be secured.
(11) The fixing nut portion 50 screwed into the insertion shaft 47 a of the diameter expanding means 47 is locked to the upper end surface 42 c of the body portion 42, and the annular fixing member 5 is the pressing portion of the body portion 42 and the diameter expanding means 47. Since it is held so as to be sandwiched between 48, it is possible to prevent the annular fixing member 5 and the diameter expanding means 47 from falling off, and it is easy to handle and excellent in practicality.
(12) Since the lower end side outer periphery of the body portion 42 has a reduced diameter portion 43 that is reduced in diameter and formed in a tapered shape, the fixing nut portion 50 that is screwed into the insertion shaft 47 a of the diameter expanding means 47. The annular fixing member 5 can be raised while being expanded in the outer circumferential direction along the reduced diameter portion 43 simply by rotating the outer diameter of the body portion 42 in the vicinity of the upper end of the reduced diameter portion 43. The anchor 41 can be fixed by expanding the diameter to a larger diameter and bringing the outer peripheral surface into contact with the hole wall 11 a of the lower hole 11.
(13) Since the insertion shaft 47a of the diameter expanding means 47 is inserted into the central through hole 42b of the body 42, the strength of the hollow body 42 can be improved, and the body 42 is buckled or bent. Can be effectively prevented, and the reliability is excellent.
(14) Since the diameter expanding means 47 has the insertion shaft holding portion 47d formed at the upper end portion of the insertion shaft 47a, the insertion shaft 47a can be easily held using the tool 60, and the fixing nut portion When fixing is performed by rotating 50, the insertion shaft 47a does not rotate together, the diameter of the annular fixing member 5 can be reliably expanded, and the base material 10 can be firmly fixed to the lower hole 11. it can.
(15) Since the annular fixing member 5 includes a plurality of dividing grooves 5b formed in parallel to the axial direction from the upper end of the peripheral wall portion 5a, the annular fixing member 5 is raised along the reduced diameter portion 43. Further, the annular fixing member 5 is easily deformed, and the annular fixing member 5 can be surely expanded in the outer peripheral direction with a small force, and the workability is excellent, and the upper end portion of the annular fixing member 5 is connected to the body portion 42 and the lower hole. 11 can be press-fitted into the gap with 11 and firmly fixed.

According to the fixing structure using the anchor in the fifth embodiment, it has the following action.
(1) Since the anchor 41 is embedded and fixed in the lower hole 11 formed in the base material 10, the anchor 41 is inserted through the anchor 41 by the fixing nut 17 screwed into the male screw portion 42 a of the trunk portion 42 of the anchor 41. The fixed object 14 can be tightly fixed to the base material 10.
(2) Since the fixed object 17 is fixed to the base material 10 via the anchor 41 by the fixing nut 17 screwed to the male screw portion 42a of the trunk portion 42 of the anchor 41, the adhesive 12 is used together. Even if the adhesive 12 filled in the lower hole 11 is not completely cured, the fixed object 14 does not move, the work can be advanced, and the construction period can be shortened.
(3) Since the fixed object 17 is fixed to the base material 10 via the anchor 41 by the fixing nut 17 screwed to the male screw portion 42a of the trunk portion 42 of the anchor 41, the adhesive 12 is used together. The adhesive 12 is changed from an uncured state to a cured state with the passage of time, so that the fixed object 14 and the base material 10 can be firmly fixed.

The anchor fixing method according to the fifth embodiment has the following effects.
(1) Since the depth of the lower hole 11 can be appropriately selected by the lower hole drilling step of drilling the lower hole 11 in the base material 10, the lower hole 11 out of the total length of the trunk portion 42 of the anchor 41. The length embedded in can be adjusted, and the fixing strength of the anchor 41 can be ensured.
(2) The anchor fixing step inserts and embeds the lower end side of the trunk portion 42 of the anchor 41 in the pilot hole 11 and expands the annular fixing member 5 with the diameter-expanding means 47 in the fixing step. Is brought into contact with the hole wall 11a of the lower hole 11, so that the body portion 42 of the anchor 41 can be reliably fixed to the lower hole 11 of the base material 10.
(3) Since the anchor 41 can be fixed to the lower hole 11 of the base material 10 by the annular fixing member 5 by the fixing process, when the adhesive 12 is used together, it is necessary to wait for the adhesive 12 to be completely solidified. In addition, the fixing nut 17 and the like can be screwed onto the male screw portion 42 a of the body portion 42 to fix the fixed object 14 to the base material 10.
(4) Since there is an adhesive filling step of filling the lower hole 11 with the adhesive 12, the outer peripheral surface of the body portion 42 embedded in the lower hole 11 can be firmly fixed with the adhesive 12. The drawing strength can be improved.
(5) Since there is an adhesive filling step of filling the lower hole 11 with the adhesive 12, the gap between the outer periphery of the body 52 and the hole wall 11a of the lower hole 11 can be filled with the adhesive 12, and rainwater or air It is possible to prevent moisture from entering, to prevent corrosion of the trunk portion 42 of the anchor 41 and to improve durability.

(Embodiment 6)
18 (a) is a perspective view of the anchor in the sixth embodiment, FIG. 18 (b) is an exploded perspective view of the anchor in the sixth embodiment, and FIG. 19 (a) is a view of the anchor in the sixth embodiment. FIG. 19B is a left side view, FIG. 19B is a front view of the anchor in the sixth embodiment, FIG. 19C is a right side view of the anchor in the sixth embodiment, and FIG. FIG. 20A is a plan view of the anchor in the sixth embodiment, FIG. 20B is a bottom view of the anchor in the sixth embodiment, and FIG. c) is a cross-sectional view of the anchor in the sixth embodiment, FIG. 21 (a) is a front view showing a deformed state of the anchor in the sixth embodiment, and FIG. 21 (b) is a view of the anchor in the sixth embodiment. When the buttocks are moved It is a front view showing. Components similar to those in the first to fifth embodiments are denoted by the same reference numerals, and description thereof is omitted.
18 to 21, the anchor in the sixth embodiment is different from that in the fifth embodiment in that a fixing female screw portion 52c is formed on the lower end side of the central through hole 42b of the trunk portion 52 of the anchor 51, and The barrel holding portion 52d is formed by a set of parallel portions at the upper end of the barrel 52, and the diameter expanding means 57 is a barrel portion with a fixing bolt shaft 57a having a tool fitting portion 57b on the head. It is that it is screwed into the fixing female thread portion 52c of 52.

FIG. 22 is a cross-sectional side view of an essential part showing a fixing structure using an anchor in the sixth embodiment. Since the fixing structure using the anchor in the sixth embodiment is the same as that in the fifth embodiment, description thereof is omitted.
Based on the fixing structure using the anchor according to the sixth embodiment configured as described above, the anchor fixing method according to the sixth embodiment will be described below with reference to the drawings.
FIG. 23 is a main part perspective view showing a fixing step of the anchor fixing method in the sixth embodiment, and FIG. 24 is a main part sectional side view showing a trunk reinforcing step of the anchor fixing method in the sixth embodiment. is there. Components similar to those in the first to fifth embodiments are denoted by the same reference numerals, and description thereof is omitted.
Since the pilot hole drilling step and the adhesive filling step in the anchor fixing method in the sixth embodiment are the same as those in the fifth embodiment, description thereof is omitted.

In FIG. 23, 62 is a tool such as a spanner that is engaged with the body holding portion 52 d and holds the body 52 of the anchor 51, and 63 is fitted into the tool fitting portion 57 b (see the figure) and It is a tool such as a wrench that rotates the fixing bolt shaft 57a.
In the fixing step, the fixing bolt shaft 57 a is raised with respect to the trunk portion 52 by rotating the fixing bolt shaft 57 a with the tool 63 in a state where the barrel portion 52 is fixed with the tool 62. Along with this, the annular fixing member 5 can be raised together with the pressing portion 48 disposed at the lower end portion of the fixing bolt shaft 57a, and the peripheral wall portion 5a of the annular fixing member 5 extends in the outer peripheral direction along the reduced diameter portion 4a. The diameter of the anchor 51 is increased, and the outer periphery thereof abuts against the hole wall 11a of the lower hole 11 to fix the anchor 51 (see FIG. 22).
Next, as shown in FIG. 24, as a subsequent step of the fixing step, a rod-like reinforcing member 65 made of metal or the like is inserted into the central through hole 42 b of the trunk portion 52 in the trunk portion reinforcing step. Thereby, the reinforcement member 65 becomes a core material of the trunk | drum 52, and a deformation | transformation of the trunk | drum 52 can be prevented. In addition, when the hole diameter of the central through hole 42b is small and the trunk portion 52 has sufficient strength, the trunk portion reinforcing step may not be performed. Further, instead of inserting the reinforcing member 65, the central through hole 42b may be filled with synthetic resin or the like.

As described above, the anchor according to the sixth embodiment has the following functions in addition to the same functions as (1) to (8) of the fifth embodiment.
(1) The diameter-expanding means 57 is disposed on the fixing bolt shaft 57a having a tool fitting portion 57b formed on the head and screwed into the fixing female screw portion 52c, and the lower end portion of the fixing bolt shaft 57a. And a pressing portion 48 that is in contact with the lower surface of the annular fixing member 5. By holding the barrel 52 and fitting the tool 63 to the tool fitting portion 57 b of the fixing bolt shaft 57 a and rotating the tool 63. The pressing portion 48 rises together with the fixing bolt shaft 57a with respect to the body portion 52, and the annular fixing member 5 disposed at the lower end of the reduced diameter portion 43 can be expanded in the outer circumferential direction.
(2) Since the diameter of the annular fixing member 5 is increased by rotating the fixing bolt shaft 57a screwed into the fixing female screw portion 52c of the body portion 52, the tightening force of the fixing bolt shaft 57a is managed. Thus, the amount of diameter expansion of the annular fixing member 5 can be easily adjusted, and a substantially constant pullout strength with little variation can be secured.
(3) The fixing bolt shaft 57 a of the diameter expanding means 57 is screwed into the fixing female screw portion 52 c of the body portion 52, and the annular fixing member 5 is sandwiched between the body portion 52 and the pressing portion 48 of the diameter expanding means 57. Since it is held in this way, it is possible to prevent the annular fixing member 5 and the diameter expanding means 57 from falling off, and the handling is easy and the practicality is excellent.
(4) Since the lower end side outer periphery of the body portion 52 has the diameter-reduced portion 43 that is reduced in diameter and is tapered, a fixing bolt shaft that is screwed into the fixing female screw portion 52c of the body portion 52. The annular fixing member 5 can be lifted while spreading in the outer circumferential direction along the reduced diameter portion 43 simply by rotating 57 a, and the upper end portion of the annular fixing member 5 is outside the body portion 52 in the vicinity of the upper end of the reduced diameter portion 43. The anchor 51 can be fixed by expanding the diameter larger than the diameter and bringing the outer peripheral surface into contact with the hole wall 11 a of the lower hole 11.

  As described above, according to the fixing structure using the anchor in the sixth embodiment and the anchor fixing method in the sixth embodiment, the same operation as in the fifth embodiment is obtained.

(Embodiment 7)
FIG. 25 is a cross-sectional view showing the main part of the anchor according to the seventh embodiment.
In FIG. 25, the anchor in the seventh embodiment is different from that in the sixth embodiment in that a female screw portion 52e is formed on the upper end side of the central through hole 42b of the trunk portion 52a of the anchor 51a.
Since the anchoring structure using the anchor in the seventh embodiment and the anchor fixing method in the seventh embodiment are the same as those in the first or sixth embodiment, the description thereof is omitted.

As described above, the anchor according to the seventh embodiment has the following operation in addition to the same operation as that of the sixth embodiment.
(1) Since the body portion 52a has the female screw portion 52e formed on the upper end side of the central through hole 42b, the fixing bolt 16 can be screwed to the female screw portion 52e. The fixing bolt 16 can be inserted into the hole 14a or the like and fixed to the base material 10.
(2) Since the body portion 52a includes both the external thread portion 42a formed on the outer periphery and the internal thread portion 52e formed on the upper end side of the central through hole 42b, the body portion 52a is used as both an external screw anchor and an internal thread anchor. It can be used and has excellent versatility.

  As described above, according to the fixing structure using the anchor in the seventh embodiment and the anchor fixing method in the seventh embodiment, the same functions as those in the first and sixth embodiments are obtained.

  The present invention can be easily and reliably fixed to a base material such as a foundation, wall, or pillar formed of concrete, mortar, block, etc. with a simple structure and is excellent in workability and without using an adhesive. It is possible to fix firmly to the base material and to-be-fixed object securely, to provide a highly durable anchor with high pull-out strength, and to fix the anchor easily and reliably, A fixing method that ensures workability and reliability in the post process, and a fixing structure excellent in workability and productivity that can securely fix the base material and the object to be fixed in a short time. The construction period can be shortened, and versatility and durability can be improved.

Claims (6)

  The lower end side of the trunk is buried and fixed in a base hole formed in a base material such as a concrete, mortar, or block, a base, a wall, or a pillar, and the base material and the object to be fixed are tightly coupled. An anchor, an external thread portion formed on the outer periphery of the body portion, a flange portion screwed to the external thread portion so as to be adjustable in height, and a central portion of the body portion parallel to the longitudinal direction of the shaft core A central through-hole formed in the lower end of the body portion, a diameter-reduced portion formed in a tapered shape by reducing the diameter downwardly on the outer periphery on the lower end side of the body portion, and a lower end of the reduced-diameter portion having a cylindrical peripheral wall portion An annular fixing member disposed on the side, and a fixing male screw portion formed on the upper end side, and inserted through a through-hole drilled in the center of the annular fixing member, the upper end portion being the center of the trunk portion An insertion shaft protruding from the through hole, and a pusher formed or disposed at the lower end of the insertion shaft and abutting against the lower surface of the annular fixing member A fixing nut portion having an outer diameter smaller than the outer diameter of the barrel portion and screwed to the fixing male screw portion at the upper end portion of the insertion shaft and locked to the upper end surface of the barrel portion; An anchor having a diameter expanding means. The anchor according to claim 1 , wherein the diameter expanding means includes an insertion shaft holding portion formed at an upper end portion of the insertion shaft. The anchor according to claim 1 or 2 , wherein the annular fixing member includes a plurality of dividing grooves formed in parallel with an axial direction from an upper end of the peripheral wall portion. A pilot hole drilling step of drilling a pilot hole in the base material, and an anchor embedding step of inserting the lower end side of the trunk portion of the anchor according to any one of claims 1 to 3 into the pilot hole. Holding the insertion shaft of the diameter expanding means of the anchor and rotating the fixing nut portion to expand the diameter of the annular fixing member, so that the outer periphery of the annular fixing member abuts against the hole wall of the lower hole. And a fixing step for contacting the anchor. 5. The anchor fixing method according to claim 4 , further comprising an adhesive filling step of filling the prepared hole with an adhesive as a pre-step of the anchor embedding step. The anchor according to any one of claims 1 to 3 , wherein the anchor is embedded and fixed in the lower hole formed in the base material, and the screw is fixed to the male screw portion of the trunk portion of the anchor. A fixing structure using an anchor, comprising: a nut; and the fixed object tightly fixed to the base material via the anchor by the fixing nut.

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