JP5566553B1 - Anchor member and its construction method - Google Patents

Abstract

An object of the present invention is to provide an anchor member for a capsule-type adhesive that can finely pulverize a capsule or a curing agent of a capsule-type adhesive and can more uniformly mix the curing agent and the main agent. And Another object of the present invention is to provide an anchor bolt construction method using the anchor member having the same diameter as the hole diameter.
The anchor member for capsule-type adhesive according to the present invention has a cut single-sided or double-sided crushing blade formed at the tip thereof, and at least two tapered annular grooves on the tip. And a crushing blade is formed in each annular groove, and a solid upper cylindrical body is formed immediately above the uppermost annular groove. An internal screw for positioning is formed immediately above. Moreover, it is the construction method of the anchor bolt using this anchor member.
[Selection] Figure 1

Description

The present invention relates to a capsule-type anchor member embedded in foundation concrete and its construction method, particularly a glass capsule-type anchor for fixing steel columns for civil engineering and construction, installation of mechanical equipment, etc. in a place where earthquakes and vibrations are likely to occur. It is related with a member and its construction method.

  In general, when fixing machinery or parts on a concrete floor or wall, or when attaching piping or double ceiling suspension bolts to the ceiling, drill holes are formed on the concrete surface with a drill bit, etc., and capsule-type adhesive Capsule-type anchor members are widely used in which the anchor member is fixed by inserting the anchor. The seismic reinforcement method combined with this capsule-type anchor member can use the minimum amount of quick-drying epoxy resin compared with the resin-injection type seismic reinforcement method. It is said that the workability at the time is faster, which is advantageous in terms of cost.

This general construction method is disclosed in Japanese Patent Application Laid-Open No. 2012-241367.
First, as shown in FIG. 5 (a), a drill bit having a drilling position marking on the concrete surface is used, and the clearance between the drilling diameter and the outer diameter of the anchor member is empirically adjusted to the outer diameter of the anchor member. And drilling is performed as appropriate. Next, as shown in FIGS. 4B to 4D, the blower and the brush are repeated from inside the concrete perforations, and the chips are carefully removed. And as shown in the figure (e), a capsule-type adhesive agent is inserted in the concrete perforation.

This capsule consists of a glass tube, a plastic container, etc. For example, as shown to Unexamined-Japanese-Patent No. 01-310100 (patent document 1 mentioned later), a liquid main ingredient, such as a liquid epoxy acrylate, and a rod-like shape with a double glass container. Some hardeners and powdered aggregates are encapsulated. Also, as shown in Japanese Patent Application Laid-Open No. 2008-150827, the capsule “the inside of the container is partitioned into at least three odd layers or more and the lubricating curing agent and the curing agent are alternately sealed, and both ends of the container are further sealed. Some capsules are sealed with a liquid or paste-like lubricating hardener.

Next, as shown in FIG. 5F, the anchor member is mounted on a rotary tool such as an electric hammer drill, and the anchor member is inserted into the concrete drilling. JIS standards for metal materials used for this anchor member include general structural rolled steel (G3101), polished steel bar (G3123), carbon steel pipe for mechanical structure (G3445), and the like. Then, the anchor member is struck and rotated, the capsule is pulverized by the pulverizing blade at the tip of the bolt, and the curing agent and the main agent are stirred and mixed. Thereafter, the anchor member is embedded in the concrete perforation to the marking position, and the mixed adhesive is filled and solidified in the perforation to fix the anchor member. In this case, as shown in FIG. 5G, a float such as an O-ring was attached so that the adhesive did not pop out, and after curing, an appropriate curing time was taken for curing.

As such an anchor member, as shown in Japanese Utility Model Laid-Open No. 59-168408 (Patent Document 2 to be described later), a socket having a larger diameter than the anchor portion at the rear end portion of the anchor bar is formed of a deformed reinforcing bar whose one end is cut on one side. The hole is drilled with a diameter that forms a necessary space for filling the adhesive around the anchor part (the diameter of the hole). "Adhesive anchor" member approximately equal to In addition, “the shaft portion embedded in the concrete member includes a pulling resistance portion having a pulling resistance member that resists a pulling force, and a weak adhesion portion that has no unevenness and is positioned from the concrete member surface to a predetermined depth. An “anchor” member is also disclosed (for example, Japanese Patent Laid-Open No. 2003-105867). In addition, “In the concrete foundation foundation rebar that is inserted into the top surface of the concrete foundation at the sharp end and attached, the rotation operation part that rotates this rebar main body is integrally formed with the rebar main body at the top end of the rebar main body. An anchor member of "characteristic foundation reinforcing bar for concrete foundation" is also disclosed (Japanese Utility Model Publication No. 62-169040 (Patent Document 3 described later)).

These anchor members are obtained by threading the heads of cast deformed reinforcing bars with external threads or internal threads, and fitting hexagon bolts or the like with internal threads or external threads. The reason why deformed reinforcing bars are widely used for anchor members is that they are strong in tensile tests. That is, the deformed reinforcing bar has a larger adhesion force to the concrete than the anchor member made of round steel with a thread groove, and the member can be firmly bonded to the concrete member. However, the processed deformed rebar is expensive and the joint with the bolt member on the head is weak, so it has not been a practical anchor member.

In addition, a groove is formed on the rear end surface of the anchor member, a nut is screwed to the outer screw at the rear end, and the polygonal surface of the socket is fitted to the nut, and the protrusion is fitted to the groove of the anchor member. A method for embedding capsule-type anchor members in which they are rotationally driven by a rotary tool has also been developed (Japanese Patent Laid-Open No. 2003-41664 (Patent Document 4 described later)). However, since the tensile strength of anchor members made of round steel with external threads is weak, resin-injected anchor members that use a large amount of adhesive are generally put into practical use, and capsule-type anchor members have been practically used so far. Was not.

Conventional capsule-type anchor members usually break and pulverize capsules with a single-sided blade at the tip, and agitate and mix the main agent and hardener, and possibly even aggregate. However, stirring and mixing using only the leading edge did not sufficiently mix the main agent and the curing agent, and the bonding strength as designed could not be obtained. For this reason, with conventional threaded anchor members and deformed reinforcing bar anchor members, the diameter of the drilling hole in the concrete frame, etc. is increased, a larger anchor member is used, or the drilling diameter is increased. It corresponded. However, since the capsule-type adhesive is expensive, it has been supposed that it is better to use a resin-injection-type adhesive if the perforation diameter is increased. On the other hand, in the case of injecting a resin injection type adhesive, it is difficult to control the injection amount of the resin because the resin is sequentially filled into a plurality of perforations. That is, the resin starts to solidify over time or the injection hole of the injection device is clogged, but these have fatal drawbacks that vary greatly depending on the operating temperature and the operator.

In addition, whether it is a capsule type or a resin injection type, the horizontal component of the pulling force of the anchor member in the circumferential direction becomes the splitting force of the surface of the concrete frame or the like. When the anchor member is enlarged or lengthened, individual splitting forces on the concrete surface are concentrated in the vicinity of the surface. That is, the tensile strength of a concrete frame or the like is weakened, and cracks around the anchor bolt may occur on the surface. In addition, if the perforation diameter is large, the short anchor member cannot be applied to a narrow concrete frame, and even if it can be drilled into a thin concrete frame, the tensile strength becomes weak and the tensile strength varies. A short anchor member had to be constructed in a large state.

Japanese Patent Laid-Open No. 01-310100 Japanese Utility Model Publication No.59-168408 Japanese Utility Model Publication No. 62-169040 JP 2003-41664 A

The present invention has been made in view of the problems of the prior art in such a capsule-type adhesive, and aims to further finely pulverize the pulverized capsule container and uniformly disperse it in an adhesive such as epoxy acrylate. . At the same time, an object of the present invention is to provide an anchor member capable of stirring and mixing a curing agent and a main agent more uniformly than ever. Another object of the present invention is to provide a short anchor member having a shorter overall length than before. It is another object of the present invention to provide an anchor member that can reliably obtain a strong tensile strength with a small amount of adhesive even when the gap between the perforated side wall and the bolt outer diameter is narrow. In addition, the present invention provides a method for constructing a structure capable of reliably obtaining a strong adhesive force even with a small amount of adhesive and preventing cracks around the anchor member on the surface of a concrete member or the like. The purpose is to provide. Moreover, an object of this invention is to provide the construction method of the structure using the said anchor member substantially the same diameter as a piercing | piercing diameter.

An anchor member for a capsule-type adhesive for solving the problems of the present invention is formed with a cut single-sided or double-sided crushing blade at the tip, and at least two tapered circles on the tip An annular groove is formed, and a grinding blade is formed in each annular groove, a solid upper cylindrical body is formed immediately above the upper annular groove, and the cylindrical body An internal screw for positioning is formed immediately above the portion.

In addition, a hole is drilled in a base material such as a concrete frame for solving the problems of the present invention, a capsule is inserted into the hole, and an anchor bolt composed of a lower neck bolt member and an anchor member is inserted. By rotating the lower bolt, the anchor member reaches a predetermined position, and by crushing the capsule, the adhesive in the capsule is filled into the perforations and solidified. And the anchor member is formed with a cut one-sided or double-sided grinding blade at the tip thereof, and at least two tapered annular grooves are formed on the tip. In addition, a grinding blade is formed in each annular groove, a solid upper cylindrical body portion is formed immediately above the uppermost annular groove, and the cylinder Directly above parts are formed internal threads for positioning, and characterized by milling the capsules or the curing agent in the gap of the borehole wall of the preform and the crushing blade of the annular groove.

Here, the reason why the annular groove is provided is to pool a predetermined amount of adhesive. Since the concrete perforated side wall facing the annular groove has a strong adhesive force, the concrete perforated diameter can be made as close to the anchor member diameter as possible. The reason why the number of annular grooves is at least two is to ensure a strong adhesive force with the concrete side wall. That is, if there are two annular grooves, the side wall of the solid solid cylindrical body portion between the two annular grooves can be used.

Moreover, since the short anchor member of the present invention has a small number of annular grooves, the splitting force does not concentrate near the surface unlike the case of a conventional deformed reinforcing bar. In addition, since the tensile strength as designed is obtained, the minimum necessary amount of capsules can be selected.

Further, the reason why the pulverization blades are formed in the annular groove is to finely pulverize the capsule or rod-shaped curing agent pulverized by the drill blade. In addition, the adhesive composed of the hardener and the main agent that has flowed into the annular groove, and the adhesive with the aggregate added depending on the case, are stirred again and mixed more uniformly. In order to perform this fine pulverization and stirring and mixing inside the annular groove, it is better that the tip of the pulverization blade is closer to the side surface of the cylindrical body. However, when the side surface of the cylindrical body is exceeded, the tip of the pulverization blade faces the annular groove. Stirring cannot be performed by hitting the side wall of the concrete perforation. The tip of the grinding blade is also determined by the depth and width of the annular groove, and the depth and width of the annular groove are appropriately determined according to the type of structure to be installed. The tip of the grinding blade needs to exceed at least the depth of the annular groove because of the necessity of further grinding. That is, even if the pulverization blade is formed in the annular groove, the tip of the blade needs to be exposed from the annular groove surface.

If the capsule-type adhesive is more uniformly stirred and mixed by the tip of the pulverization blade, as a result, a bonding strength as designed can be obtained. Moreover, the adhesive strength on the side surface of the cylindrical body can be covered by storing such a strong adhesive in the annular groove. Therefore, the adhesive strength of the anchor member as a whole is increased, an anchor member having a diameter smaller than before can be used, and a smaller amount of capsule-type adhesive can be used. Even if the gap between the perforated side wall and the side surface of the unprocessed cylindrical body is narrow, the liquid adhesive such as epoxy resin or epoxy acrylate resin can be pushed up by the pressing force for pressing the anchor member.

Furthermore, the taper is provided below the ring groove from the ring groove surface (taper end point) to the side surface of the cylinder (taper start point). This is to disperse inside. That is, even if the pulling force in the vertical direction is generated in the bolt member, the pulling force is dispersed in the horizontal direction due to the taper of the anchor member, and the tensile strength of the anchor bolt is increased by 25 to 30% compared to the case where there is no taper. Because. The taper angle is preferably in the range of 30 to 70 °, more preferably in the range of 40 to 60 °, depending on the shape of the anchor member.

Here, in the present invention, the side surface shape of the unprocessed solid cylindrical body is left as it is immediately above the uppermost annular groove in order to increase the tensile strength as the anchor member. Since the annular groove and the internal thread part weaken the tensile strength of the anchor member, leave the solid solid cylindrical body part not to form the fragile part and to form the upper cylindrical body part. . Even if the anchor member is short and thick by forming the upper cylindrical body portion, the tensile strength as the anchor member is secured.

Moreover, even if it is a short anchor member, it can maintain a parallel with a piercing side wall using the full length of a short anchor member, and can use the piercing side wall as a reference | standard of the vertical axis | shaft of an anchor bolt. Note that the term “short anchor member” clearly expresses that it is not torn at a location on the anchor member in a tensile test but is broken at a surface location such as a concrete frame.

Moreover, in order to leave the side surface shape of the unprocessed cylindrical body in one place, preferably two places on the vertical line of the side surface shape of the lower end portion, a cut single-sided, preferably double-side grinding blade is formed. It was decided. By leaving the side shape of the unprocessed cylindrical body as it is at the upper and lower end portions, it is possible to accurately install the short anchor member in the vertical direction.

In addition, since the threaded inner thread is formed on the upper end surface, when the lower neck bolt is rotated, the anchor member is screwed and the washer rises to the position of the nut, and the anchor member is screwed. Stop. As a result, the nut serves as a stopper, the washer serves as a marking, and the position of the anchor member in the hole is determined. Thereafter, the raised adhesive is pushed horizontally by a washer. That is, the washer acts as a float. For this reason, even if there is some variation in the drilling depth when drilling a base material such as a concrete frame, the position in the drilling where the anchor member is marked by the neck bolt member is adjusted. As described above, since one predetermined amount of capsule is introduced into one perforation, the amount of capsule-type adhesive covering the entire surface of the anchor member can be made constant. That is, since the entire side surface of the anchor member is covered with the adhesive layer that is more uniformly stirred and mixed, a strong adhesive strength can be obtained stably and reliably.

Preferred embodiments of the anchor bolt of the present invention are as follows.
It is preferable that the solid cylindrical body part is formed between the annular grooves of each step of the anchor member. The weak mechanical strength of the annular groove is covered to some extent by the taper, but this is to ensure reinforcement against the tensile strength of the short anchor member. Similarly, it is preferable that a solid lower cylindrical body portion is formed between the tip portion and the annular groove.

Moreover, it is preferable that an annular groove is 2-6 steps. Since the total length of the anchor member is desirably as short as possible, it is preferably up to 6 stages, and more preferably 2 to 4 stages in order to reduce the amount of expensive capsules used.

The grinding blade is preferably a V-cut double-sided grinding blade. This is because the both side walls of the cylindrical body remain symmetrical with respect to the central axis at the lower end due to the V-shaped cut, and the both ends of the side wall can be used in the short anchor member.

Further, it is preferable that 2 to 4 crushing blades are arranged at an equal angle. More preferably, two or four are arranged at an equal angle. This is because the main agent and the curing agent are mixed efficiently and uniformly. The pulverization blade can be formed at a desired height by pressing the die. The tip of the grinding blade is substantially from the end point of the taper to the start point. If the embossing is strengthened, the tip of the grinding blade can be exposed from the end point of the taper, that is, the annular groove surface, but if the height from the annular groove surface to the tip of the grinding blade is small, the rotational force This is because it is difficult to finely pulverize or stir and mix the capsule or curing agent unless the amount is increased.

The tip of the pulverizing blade is preferably 40 to 100% of the depth of the annular groove. This is because the capsule or the curing agent can be finely pulverized by the tip of the pulverization blade, and the mixed adhesive can be further uniformly stirred and mixed. It is more preferable that the pulverization blade is provided with a dent because it can be further uniformly stirred. In addition, it is more preferable to press the die formed integrally with the annular groove because the mechanical strength of the pulverization blade is higher than that of cutting and the mechanical strength of the annular groove is reinforced.

According to the anchor member of the present invention, the glass capsule container or the curing agent can be finely pulverized by the pulverization blade rather than the V-cut blade. Further, the pulverization blade can stir and mix the main agent, the curing agent, and the aggregate more uniformly. As a result, even with anchor members and capsules that are slightly smaller than conventional ones, it is possible to obtain a tensile strength equal to or higher than conventional ones. Moreover, even a quick-drying adhesive can be efficiently stirred and mixed. Furthermore, according to the anchor member of the present invention, the overall tensile strength can be increased due to the taper even if the side strength of the unprocessed cylinder is weak with respect to the pulling force. Further, even a shallow anchor member for drilling concrete in a shallow depth can provide a tensile resistance equal to or higher than that of a conventional long bolt member because the resistance against tension acts in the horizontal direction due to the taper. Moreover, according to the anchor member of the present invention, the short anchor member can be accurately installed in the vertical direction.

Further, according to the anchor bolt construction method of the present invention, the above-described effect of the anchor member can be obtained, and even with a narrow concrete width, a strong adhesive strength can be obtained by a drilling diameter substantially equal to the diameter of the anchor member. Can be obtained. Further, since the anchor member and capsule to be used are reduced, the material cost is reduced and the construction period is shortened, which is economically advantageous.

In the anchor member according to the present invention, (a) is an overall perspective view, (b) is an enlarged view of an annular groove, and (c) is an enlarged sectional view of the annular groove. It is a cross-sectional schematic diagram immediately after constructing the anchor bolt which concerns on this invention. The cross-sectional schematic diagram of the shape which pulled out the anchor member which concerns on this invention is shown. The component of the neck bolt member applied to the anchor member which concerns on this invention is shown. The construction procedure of anchor bolts is shown.

  Hereinafter, the form for implementing the anchor member which concerns on this invention is demonstrated concretely based on FIGS.

An anchor bolt (1) shown in FIG. 2 includes an anchor member (2) according to the present invention and a neck bolt member (3) shown in FIG.
As for the anchor member (2), a blind hole (4) having a depth of 18 mm and an inner diameter of 8 mm was formed at one end of a steel cylinder having a diameter of 14 mm and a total length of 55 mm, and a female screw was cut. Four circular grooves (5, 5 ', 5 ", 5'") with a diameter of 12m are provided at a distance of 22mm straight from the end face of the blind hole (4), and the other end is cut into a V-shape with a height of 8mm. A double-sided grinding blade (6) was obtained. The first annular groove (5) has a taper (7) having an overall width of 5.5 mm, a depth of 1 mm, and a vertical distance of 2 mm. In addition, a pair of pulverization blades in the diametrical direction is pressed into the annular groove (5) by pressing the front right pulverization blade (8) and the left pulverization blade (8 ') and the left and right pulverization blades (not shown). A total of 2 stands. The pair of left and right grinding blades (8, 8 ') have gentle left and right tip surfaces (81, 81') each having a length of 4 mm and a width of 1 mm, and each 0.2 mm from the radius of the unprocessed cylinder side surface (14). Short length (height of 80% of the depth of the annular groove measured from the same radius). Further, the inside sandwiched between the pair of left and right tip surfaces (81, 81 ′) is a recess (9) having a maximum depth of 0.5 mm. There is an unprocessed cylinder part of 2 mm from the first-stage annular groove (5) to the second-stage annular groove (5 ′), and continues to the fourth-stage annular groove in the same manner. This was plated with trivalent chromium to obtain an anchor member (2).

On the other hand, the male screw of the lower neck bolt (10) having a diameter of 10 mm in the lower neck bolt member (3) is screwed into the female screw of the blind hole (4). The male screw is provided with a washer that serves as a float (11) and a nut that serves as a stopper (12).

As shown in FIG. 5 (a), a concrete block having a size of 1000 mm × 1000 mm × 500 mm (design preliminary strength is 24 N / mm ² ) is used to place an anchor at a diameter of 14.5 mm and a depth of 55 mm using a concrete drill. Drill a perforation. Next, the inside of the perforation is cleaned, and a glass capsule (AP-10 manufactured by Asahi Kasei Co., Ltd.) in which an adhesive composed of a liquid main component of epoxy acrylate resin, a rod-shaped curing agent, and a powdery aggregate is enclosed is inserted. The anchor bolt (1) has a groove threaded on the upper end surface of the anchor member (2), and a neck bolt (10) with a washer (11) and a nut (12) is screwed as shown in FIG. doing.

Next, although not shown, a socket is fitted to the nut (12), a concrete drill hammer drill manufactured by Hitachi Koki is driven, and the anchor member (2) and the nut (12) are rotated together. And as shown in FIG.5 (f), an impact force is applied to a perpendicular direction, a capsule is destroyed, and the main ingredient, hardening agent, and aggregate which were enclosed inside are mixed. Thereafter, the adhesive is first further agitated and mixed by the pulverized blades in the annular groove (5 ′ ″), and agitated and mixed one after another, and a stopper (12) positioned on the upper end surface of the anchor member (2). Then, the rotary jig 11 and the stopper (12) and the float (11) were taken out and left at room temperature for 24 hours until the adhesive was completely solidified. FIG. 2 schematically shows a cross-sectional view immediately after the anchor bolt (1) according to the present invention is constructed.

When a tensile test was performed according to JIS Z2241, using an Amsler type universal compression tensile tester manufactured by KFC Corporation, the tensile strength was 1.7 tons. The drawn concrete frame has a bowl-like shape, which is schematically shown in FIG.

A tensile test was conducted in the same manner as in Example 1 except that the total length was 40 mm and the number of annular grooves was three, and the tensile strength was 1.9 tons. The shape of the drawn concrete frame was a bowl shape.

A blind hole (4) having a depth of 38 mm and an inner diameter of 11 mm was formed in one end of a stainless steel cylinder having a diameter of 24 mm and a total length of 85 mm, and a female screw was cut. A 15.5 mm diameter, four-stage annular groove (5,5 ′, 5 ″, 5 ′ ″) is provided at a distance of a straight length of 38 mm from the end surface, and the other end is V-cut on both sides with a height of 10 mm. A grinding blade (6) was obtained. The first-stage annular groove (5) has a taper (7) with a vertical distance of 3 mm on an annular groove surface having a total width of 9 mm and a depth of 1.3 mm. The annular groove (5) is provided with two pairs of grinding blades (8, 8 ') in the diameter direction. The gentle left and right tip surfaces (81, 81 ') of the pair of left and right grinding blades (8, 8') are spaced by 4 mm. The height of the tip surface is a length that is 0.4 mm shorter than the radius of the side surface (14) of the unprocessed cylinder (60% of the depth of the annular groove measured from the radius). The width of the gentle left and right tip surfaces (81, 81 ') is 2 mm, and the inside between the pair of left and right tip surfaces (81, 81') is a recess (9) having a maximum depth of 1 mm. There is an unprocessed cylindrical part of 4 mm from the first annular groove (5) to the second annular groove (5 ′), and in the same way to the fourth annular groove (5 ′ ″). This was designated as the anchor member (2) of Example 3.

On the other hand, a male screw of a lower neck bolt (10) having a diameter of 12 mm is screwed onto the female screw, and a washer that serves as a float (11) and a nut that serves as a stopper (12) are provided on the male screw.

In the same manner as in Example 1, perforations having a diameter of 25 mm and a depth of 85 mm were formed in a concrete block having a size of 1000 mm × 1000 mm × 500 mm, and a capsule (AP-16 manufactured by Asahi Kasei Corporation) was inserted. The concrete drilling hammer drill made by Hitachi Koki was driven to break the capsules and left for 24 hours at room temperature until the adhesive solidified.

When a tensile test was performed according to JIS Z2241, using an Amsler type universal compression tensile tester manufactured by KFC Corporation, it was 5.5 tons. The shape of the drawn concrete casing was a bowl-like shape as in Example 1.

Comparative Example 1

Except that the tips of the pair of grinding blades (8, 8 ') are each 1.0 mm shorter (0% of the depth of the annular groove) from the radius of the unprocessed cylinder side surface (14). The same anchor bolt (1) as Example 1 was installed. When a tensile test was performed according to JIS Z2241 using an Amsler type universal compression tensile tester manufactured by KFC Corporation, it was found to be only 1.0 ton. The shape of the drawn concrete frame was a carrot shape.

As is apparent from the test results of Example 1 and Comparative Example 1, the tensile strength was about twice as high as when there was no taper (7) and a pair of grinding blades.

Comparative Example 2

The anchor bolt (1) was installed in the same manner as in Example 1 except that the taper was not used, and a tensile test was performed according to JIS Z2241, using an Amsler universal compression tensile tester manufactured by KFC Corporation. However, it was 1.3 tons.

As is apparent from the test results of Example 1 and Comparative Example 2, the tensile strength was about 30% higher than when there was no taper (7).

Comparative Example 3

Except that a drill with a diameter of 16 mm and a depth of 55 mm was drilled using a concrete drill, and 8 cm ³ of an epoxy acrylate resin chemical setter (EX-400 manufactured by Asahi Kasei Co., Ltd.) was injected therein, as in Example 1. When the anchor bolt (1) was installed and a tensile test was performed according to JIS Z2241, using an Amsler type universal compression tensile tester manufactured by KFC Corporation, it was 1.6 tons.

As is clear from the test results of Example 1 and Comparative Example 3, in the case of the resin injection type, the drill diameter of the drill was increased by about 10% compared to the case of the capsule type, and the amount of resin increased accordingly.

Conventional Example 1

Instead of an annular groove, a screw groove (length 52 mm x pitch 2.7 mm) is threaded on the side of a cylinder with an outer diameter of 16 mm and a total length of 80 mm, and a drill with a diameter of 18 mm and a depth of 80 mm is drilled using a concrete drill. The anchor bolt (1) was installed in the same manner as in Example 1 except that 11 cm ³ of an epoxy acrylate resin chemical setter (EX-400 manufactured by Asahi Kasei Corporation) was injected therein. A tensile test was conducted according to JIS Z2241 using an Amsler type universal compression tensile tester manufactured by the manufacturer. The shape of the concrete frame pulled out was a carrot.

As is clear from the test results of Example 1 and Conventional Example 1, the tensile strength of the capsule type with the tapered annular groove was 1.5 times or more higher than that of the resin injection type with the thread groove.

As is clear from the above results, the anchor bolt of the present invention has an overwhelmingly higher pulling strength than the conventional product by accumulating an adhesive in the annular groove and the upper end surface of the anchor member. Compared with it, the tensile strength was much higher.

The present invention relates to fixing / installation of vibration machinery and equipment such as concrete frame stoppers, elevators, escalators, shutters, conveyors, etc., fixing / installation of evacuation ladders and soundproof walls, installation of highway, railroad fall prevention nets / fences, passengers There are applications such as fixing and installing platform doors and fall prevention fences on station platforms, attaching fenders and sign boards, and installing rail sleepers for trains.

DESCRIPTION OF SYMBOLS 1 ... Anchor bolt 2 ... Anchor member 3 ... Neck bolt member 5, 5 '... Ring groove 7 ... Taper 8 ... Grinding blade 9 ... Recess

Claims (8)

An anchor member used for a capsule-type adhesive, wherein a cut single-sided or double-sided crushing blade is formed at the tip, and at least two tapered annular grooves are formed on the tip. In addition, a grinding blade is formed in each annular groove, a solid upper cylindrical part is formed immediately above the uppermost annular groove, and positioning is provided immediately above the cylindrical part. An anchor member for a capsule-type adhesive, characterized in that an internal screw is formed. 2. The capsule adhesive anchor member according to claim 1, wherein a solid solid cylindrical body is formed between the annular grooves of each step. 2. The anchor member for capsule adhesive according to claim 1, wherein a solid lower cylindrical body portion is formed between the tip portion and the annular groove. 2. The capsule adhesive anchor member according to claim 1, wherein the number of stages of the annular groove is 2 to 6. 2. The capsule adhesive anchor member according to claim 1, wherein 2 to 4 crushing blades are arranged at an equal angle. 2. The capsule adhesive anchor member according to claim 1, wherein a tip of the grinding blade is 40 to 100% of a depth of the annular groove. Drill a hole in a base material such as a concrete frame, put a capsule in the hole, insert an anchor bolt made up of a neck bolt member and an anchor member, and then rotate the neck bolt to fix the anchor member. In the construction method of the anchor bolt that reaches the position and crushes the capsule so that the adhesive in the capsule is filled in the perforation and solidifies, the neck bolt member includes a float and a stopper, and the anchor member is The front end portion is formed with a cut single-sided or double-side grinding blade, and at least two steps of tapered annular grooves are formed on the front end portion. Grinding blades are formed, a solid upper cylindrical part is formed immediately above the uppermost annular groove, and a positioning inner part is provided immediately above the cylindrical part. Di is formed, and the construction method of the anchor bolt, characterized by milling the capsules or the curing agent in the gap between the crushing blades of the hole wall and the annular groove of the base material The number of steps of the annular groove is 2 to 6, and the anchor bolt construction method according to claim 7.

Images