JP2001020921A - Collar for anchor and anchor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a collar for anchors and an anchor at low cost, which can be used as a jig, whose tip section can be easily expanded radially from its shaft center and which is not be broken even if the tip section is folded and prevents another jig for forming a polygon column-like hollow section at a tip section of the collar from wearing and damaging with ease by press- fitting a wedge into the collar. SOLUTION: A collar for anchors is formed with a hole 3, into which the tip section 1a of a differently shaped bar 1 is inserted, at a base section and is provided with a collar 6, which is formed with a column like hollow section 4 having a polygonal cross area at its end section. In this case, the thin wall section between sides 4a and 4a, where the two face of the column-like hollow section 4 are jointed with each other, and the external periphery of the collar 6 correspond to thin wall sections 5 and 5 to be broken in the longitudinal direction, and the thin wall sections 5 and 5 are broken by press-fitting a truncated pyramid-shaped wedge 7 into the polygonal column-like hollow section 4 to expand the tip of the collar 6 radially from the shaft center.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor collar and an anchor frequently used on construction sites.

[0002]

2. Description of the Related Art Conventionally, there has been an anchor having an anchor collar attached to one end as shown in FIGS. The structure of the anchor collar is as follows. “Conventional example 1” Conventional general anchors are shown in FIGS.
As shown in FIG. 1, a cylindrical collar P is fixed to one end of a deformed rod T, and is formed by a frusto-conical wedge S which is press-fitted into one end of the collar P. The collar P is formed by a cylindrical body, and a columnar cavity Q is provided in the axis. A slit R, R extends from one end of the collar P in the longitudinal direction and has a cross-shaped radial direction passing through the axis. And a frusto-conical wedge S from one end of a cylindrical cavity Q of the collar P
Is press-fitted, one end of the collar P expands radially about the axis. The color P of this anchor
The wedge S is inserted into the hole Y formed in the laid concrete X from the collar P of the anchor, and the other end of the deformed rod T is banged.
After the tip of the collar P is widened, the hole Y
The anchor is fixed to the hole Y of the concrete X by injecting paste-like cement into the hole. (See Fig. 12)

Conventional Example 2 An anchor collar as shown in FIG. 11 has been filed as an improvement to reduce the manufacturing cost of the anchor. (Heisei 5-923
01) The anchor collar has longitudinal grooves U and V formed at opposing positions inside and outside the front end of the collar P instead of the slits R and R of the collar P of the first conventional example. When the wedge S is press-fitted into the collar P, the grooves U and V facing each other are cut off, and the tip of the collar P is expanded as in the first conventional example.

[0004]

In each of the conventional examples 1 and 2, one end of the collar is formed in a cylindrical shape and then formed with a slit or a groove. Each of the distal ends when press-fitting and expanding has an inwardly curved arc shape, and each of the arc-shaped distal portions is radially bent and expanded from the vicinity of the ← mark shown in FIG. XX. become. Therefore, the arc-shaped tip portion is structurally formed so as to be hard to bend in the radial direction, and there is a danger of breaking if it is forcibly bent. Further, the conventional example 2 requires a double step of forming a groove inside and outside of the distal end portion, and the jig used in the step is easily worn away, resulting in high cost. In view of the above-described drawbacks, the problem to be solved by the present invention is that a wedge is press-fitted into a collar, and the front end of the collar can be easily expanded radially from an axis, and the front end can be expanded. Provide a low-cost anchor collar and anchor by using a jig that does not break even when it is bent and does not easily wear or damage when forming the polygonal columnar cavity at the tip of the collar. It is an object.

[0005]

Means for Solving the Problems An anchor collar and an anchor according to the present invention solve the above problems and are as follows. The collar for an anchor according to claim 1, further comprising a collar having a base formed with a hole for attaching a tip of a deformed rod, and a pillar having a polygonal cross section formed at the tip. The thin part between the side that is the part and the outer periphery of the collar is a thin part for bursting in the longitudinal direction, and the thin part for burst is ruptured by pressing a frustum-shaped wedge into the polygonal columnar cavity, and the The distal end is widened radially from the axis.

The anchor collar according to a second aspect of the present invention is provided with a collar having a base formed with a hole for mounting the tip of the deformed rod, and a pillar having a deformed polygonal cross section at the tip. The thin portion between the side, which is the two-sided joint of the cavity, and the outer periphery of the collar is a thin portion for bursting in the longitudinal direction. The thin portion for bursting is formed by pressing a frustoconical wedge into the deformed polygonal columnar cavity. It is characterized by bursting and expanding the tip of the collar radially from the axis.

In the anchor according to the third aspect of the present invention, a deformed rod and a hole for attaching a tip end of the deformed rod are formed at a base, and a columnar cavity having a polygonal cross section is formed at the tip end. The thin part between the side and the outer periphery, which is the two-face joint, is a collar that is a thin part for bursting in the longitudinal direction, and the thin part for burst is ruptured by press-fitting into the polygonal columnar cavity of the collar. And a frustum-shaped wedge whose tip expands radially from the axis.

According to a fourth aspect of the present invention, there is provided an anchor having a base formed with a deformed rod and a hole for attaching a tip of the deformed rod, and forming a column-shaped cavity having a deformed polygonal cross section at the end, the deformed polygonal column. The thin part between the side and the outer periphery that is the two-sided joint of the cavity is a collar that is a thin part for bursting in the longitudinal direction, and the thin part for burst is ruptured by pressing into the deformed polygonal columnar cavity of the collar, And a frustoconical wedge that widens the tip of the collar radially from the axis.

[0009]

Embodiments of the present invention will be described below. Embodiment 1 First, the anchor collar will be described. An outer shape having a predetermined length forms a hole for fixing one end of the deformed bar to the base of the cylindrical round bar. At the tip of a round bar having a hole formed at its base, a columnar cavity having a polygonal cross section is formed. The outer periphery of the collar having the above configuration and the sides (two-sided joints) of the polygonal columnar cavity are thin portions formed with a small thickness. The thin portion of the collar is a thin portion for rupture, and when a frustum-shaped wedge described later is press-fitted, the collar is ruptured in the longitudinal direction and the tip of the collar is radially expanded from the axis. .

[Embodiment 2] Next, an anchor will be described. Form a modified bar that fits into and secures (regardless of means) the hole in the base of the anchor collar. A frustoconical wedge is press-fit into the polygonal columnar cavity of the collar. The distal end of the deformed rod is screwed into the hole in the base of the collar of the first embodiment, or fitted into the hole, and pressure-pressed from the reverse radiation direction toward the axis of the deformed rod. Stick. When a frustum-shaped wedge is press-fitted into the polygonal columnar cavity at the tip of the collar to which the deformed rod is fixed, as described above, the thin portion that is the side of the polygonal columnar cavity of the collar (the two-sided junction) breaks and ruptures. The front end of the collar is radially expanded about the axis.

[Third Embodiment] The polygonal columnar cavity of the anchor collar of the first embodiment and the anchor collar of the second embodiment has a modified polygonal columnar cavity which is a form of a polygon. The basic operation is the same as that of the above-described embodiment.

[0012]

Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of an anchor bolt according to the present invention, and FIG. 2 is a state in which a wedge is inserted into a hole of a collar of the anchor according to the present invention and the anchor is inserted into a hole drilled in concrete on which the anchor is laid. Fig. 3 is a cross-sectional view showing the vicinity of the lower end of the collar. Fig. 3 shows that a wedge is inserted into the hole of the collar of the anchor according to the present invention, inserted into a hole formed in the concrete on which the anchor is laid, and a wedge is inserted into the hole of the collar. FIG. 4 is a cross-sectional view showing the vicinity of the lower end of the collar in a stressed state.
FIG. 4 is a cross-sectional view showing the vicinity of the lower end of the collar in a state where a wedge is inserted into a hole of a collar of a different shape of the anchor according to the present invention.

A description will be given with reference to FIGS. First, a deformed bar 1 having a predetermined length is prepared. Next, as a material of the collar 6 to be fixed to one end 1a of the deformed bar 1, an iron round bar, that is, an iron bar 2 having a predetermined length formed in a columnar shape is prepared.
A cylindrical hole 3 for inserting and fixing one end of the deformed bar 1 to the base of the iron bar 2 is formed. A second hole 4a for inserting a wedge to be described later is formed at the tip of the iron bar 2. The second hole 4a has a columnar cavity 4 having a polygonal cross section.
The thin portions between the sides 4a, 4a, which are the two-face joints of the cavity 4, and the outer periphery of the iron bar 2 are the thin portions 5, 5 for rupture formed in the longitudinal direction. As described above, the columnar hole 3 is formed at the base portion, and the columnar cavity 4 having a polygonal cross section is formed at the distal end, and the length between the sides 4a, 4a of the polygonal columnar cavity 4 at the distal end and the outer periphery. A collar 6 having directional rupture thin sections 5, 5 is formed. A frustum-shaped (generally frustoconical) wedge 7 is formed to be inserted into the polygonal columnar cavity 4 at the tip of the collar 6. The frustum-shaped wedge 7 is replaced with a polygonal columnar cavity 4 of a collar 6.
When press-fitted into the wall, the thin portion 5 for rupture of the polygonal columnar cavity 4
5 is ruptured, and each piece 6a, 6a at the tip of the collar 6 expands radially from the axis. The hole 3 at the base of the collar 6 is screwed or fixed to the tip 1a of the deformed rod 1, or is fitted and pressed toward the axis from the reverse radiation direction to fix it by pressure (not shown). The polygonal columnar cavity 4 of the collar 6 having the above-mentioned shape is provided with a jig (a pin, not shown) having the same cross section as the polygonal columnar cavity 4 by cold forging (hot forging, other methods). Is pressed against the one end of the round bar 1 and pressurized with high pressure. An anchor collar and an anchor having the above configuration. In addition, the cross-sectional shape of the polygonal columnar cavity of the collar is illustrated as a square, but is not limited to the square, and may be a hexagon as shown in FIG. For example, various shapes such as a triangle, an octagon, a star, and a modified hexagon described below are conceivable, and a polygonal columnar cavity having any shape may be used. Further, the shape of the wedge may be a truncated pyramid without being limited to the illustrated truncated cone.

The anchor having the above configuration is used as follows. At a desired position of the laid concrete X, a hole Y having a diameter slightly larger than the outer shape of the collar 6 of the anchor and having a predetermined depth is formed. A collar 6 of an anchor having a frustum-shaped wedge 7 inserted into a polygonal columnar cavity 4 is inserted into a hole Y formed in the concrete X, and the other end of the deformed rod 1 fixed to the collar 6 is hit with a hammer or the like. Then, the wedge 7 is pressed into the polygonal columnar cavity of the collar 6 and the collar 6 is pressed.
Is expanded radially from the axis, and the anchor is fixed to a hole Y formed in the concrete X. Paste cement is injected into the gap between the outer periphery of the anchor (collar and deformed bar) 6 fixed to the hole Y formed in the concrete X and the inner wall surface of the hole Y formed in the concrete X. Firmly. As described above, the lower part of the deformed bar 1 protruding above the concrete of the anchor fixed to the concrete X is bent so as not to hinder the subsequent work.

The anchor collar and anchor having the above-described structure have the following functions and effects. Conventional color P
After forming the cylindrical cavity Q at the tip of P1, P2,
A longitudinal cross-shaped slit R1 was formed at a position radially from the axis, or longitudinal cutout grooves S1 and S2 were formed at opposing surfaces inside and outside the position radially from the axis. . In addition, the tips of the conventional collars P1 and P2 have an arc shape curved inward with a thickness of about 1.5 to 2 mm (or 3 mm) (a slit is formed in a cylindrical collar). When the wedge S is inserted into the cavity Q, the inner surface of the opening of the cavity Q comes into line contact with the outer periphery of the wedge S. Therefore, when the wedge S is press-fitted, the other end of the deformed rod T must be strongly hit with a large force. The collars P1,
When the tip of P2 expands in the radial direction from the axis, when the tips of the collars P1 and P2 expand and bend in the radial direction,
The possibility that the bent portion was broken was high. As described above, the conventional collars P1 and P2 are manufactured by a multi-step process, that is, after being formed in a cylindrical shape, the slits R are formed in a cross shape.
1, R1 or the notches S1, S2 are formed, so that the manufacturing cost is high, the shape is difficult to expand in the radial direction, and there is a possibility of breakage. it was high. That is, as shown in FIG.
Since the outer periphery of the wedge S is in line contact with the inner wall surface of the collar from the beginning when the wedge S is inserted, the frictional resistance when the wedge S is press-fitted is large, and a large pressure is required for the wedge S to be press-fitted. However, according to the collar 6 of the present invention, only the polygonal columnar cavity 4 is formed at the front end of the collar 6 in one step.
Since the steps of forming the first and the first R1 and the notches S1 and S2 are omitted, the manufacturing cost can be reduced. Since the tip of the collar 6 is not arcuate, it is easy to press-fit the wedge 7 into the polygonal columnar cavity 4 to expand the tip of the collar 6 radially from the axis. Each of the collars 5 and 5 is formed to have a thickness of about 0.1 to 1 mm so as to be easily ruptured and ruptured, and the other portions are formed to be thick (about 2 to 5 mm). Piece 6a,
6a has no risk of breakage and damage. The inner wall surface of the polygonal columnar cavity 4 of each of the pieces 6a, 6a of the collar 6 and the outer periphery of the wedge 7 are in point contact at the beginning of insertion, and when the wedge 7 is pressed, the contact portion becomes line contact and becomes longer. The pressure at the time of press-fitting is small, and the work is easy. When the wedge 7 is pressed into the polygonal columnar cavity 4 of each piece 6a, 6a of the collar 6, the outer periphery of the collar 6 and concrete X
The inner wall surface of the hole Y and the outer periphery of the wedge 7 and the respective pieces 6a of the collar 6,
The inner wall surfaces of the polygonal columnar cavities 6a are in surface contact with each other, and even if the anchor is to be pulled out from the hole Y of the concrete X, the frictional resistance is large, and it cannot be easily pulled out. Since the thickness of the central portion of each of the pieces 6a, 6a of the collar 6 is large (excluding the thin portion), the tip of the wedge or the like can be reduced in diameter. It can be fixed to the hole Y by pressing. With the above configuration and function, an anchor that can be manufactured at low cost and that can be securely fixed to the hole Y of the concrete X has been obtained.

FIG. 5 is an exploded perspective view of an anchor according to the present invention. FIG. 6 is a diagram illustrating an anchor according to the present invention, in which a wedge is inserted into a collar hole and the anchor is laid on concrete. FIG. 7 is a cross-sectional view showing the vicinity of the lower end of the collar inserted into the hole. FIG. 7 shows a state in which a wedge is inserted into the hole of the collar of the anchor according to the present invention, and the anchor is inserted into a hole formed in the concrete on which the anchor is laid. FIG. 8 is a cross-sectional view showing the vicinity of the lower end of the collar in a state where the wedge is pressed into the hole of the collar.
A cross-sectional view showing the vicinity of the lower end of the collar in a state where the wedge is inserted into the hole of the collar of the anchor according to the present invention, the anchor is inserted into the hole formed in the concrete on which the anchor is laid, and the wedge is pressed into the hole of the collar. It is.

Another embodiment of the present invention shown in FIGS. 5 to 8 will be described. In the following description of the present embodiment, the same components as those of the already described embodiment of the present invention are denoted by the same reference numerals, and duplicate description will be omitted. In the present embodiment, a modified hexagonal polygonal columnar cavity as one form of the modified polygonal columnar cavity will be described as an example. However, the present invention is not limited to the illustrated modified hexagonal cavity. The deformed polygonal columnar cavity is not a uniform distance from the axis of the cavity to a side which is a two-sided joint on the outer periphery of the cavity, but has a long and short distance alternately, and has a star-shaped cross section (two sides). Is formed as a plane), or between the two sides thereof is formed as an arc-shaped surface protruding toward the axis. For example, a side having a long distance from the axis is a predetermined side. A deformed polygonal column-shaped cavity of any shape provided that it is formed as an extremely thin (about 0.1 to 1 mm) thick portion, that is, a thin portion for rupture, between the long side and the outer periphery thereof. Is also good.

As shown in FIGS. 5 to 8, the main difference from the first embodiment is that a polygonal columnar cavity 4 at the tip of a collar 6 is provided.
Is a modified hexagonal polygonal columnar cavity 11.
The deformed hexagonal polygonal columnar cavity 11 will be described in detail. As shown in the figure, the cross section of the deformed hexagonal polygonal columnar cavity 11 at the end of the collar 6 is not a regular hexagon, but has a deformed hexagonal shape that is nearly a regular triangle, and the whole is Each side of the equilateral triangle is a deformed hexagon in the shape of being bent inward at the central portions 14, 14, and the outer shape of the collar 6 is formed in a columnar shape. Therefore, the vertices 12 and 12 of the deformed hexagonal polygonal column-shaped cavity 11 having a shape close to an equilateral triangle are easily ruptured when the frusto-conical wedge 7 is pressed in similarly to the first embodiment. In addition, it is formed as a very thin portion, that is, a thin portion 13 for rupture. Part 1 bent at the center of each side of the equilateral triangle
4 and 14 are thick enough not to be ruptured even if the wedge 7 is press-fitted.
Abuts the inner wall surface of the hole Y drilled in
Both ends 15a, 15a of the pieces 15, 15 at the tip of the collar 6, which have been broken by the thin portions 13 for rupture, are pushed out so that they can easily adhere to the inner wall surface of the hole Y formed in the concrete X. Has become. The portion bent at the center of each side of the equilateral triangle may be formed into an arc shape curved inward. An anchor collar and an anchor configured as described above.

When the frusto-conical wedge 7 is inserted into the anchor collar having the above-described structure, the central portion of the deformed hexagonal polygonal columnar cavity 11 of the collar 6 is located near both sides of the bent portions 14 and 14 (total of six locations). Inner wall surfaces 16, 16 and the inner wall surfaces 16,
Since only the outer periphery of the wedge 7 facing the position 16 is in point contact, the pressure in the first stage is small and the work is easy. (FIG. 6) When the press-fitting proceeds from the first stage to the second stage, the thin portion for rupture 1
Inner wall surfaces 16, 16 near both sides of the bent portions 14, 14 at the center of the respective pieces 15, 15 of the collar 6 ruptured at 3, 3.
And the outer periphery of the wedge 7 at a position facing the inner wall surfaces 16, 16,
In addition, the outer periphery of the collar 6 facing the bent portions 14, 14 at the center of the pieces 15, 15 of the collar 6 and the inner wall surface of the hole Y of the concrete X facing the outer periphery of the collar 6 make line contact in the longitudinal direction. The stability is increased, and the collar 6 and the wedge 7 are fixed. (FIG. 7) In the third stage (final stage) in which press-fitting is further advanced from the second stage and the wedge 7 is pressed into the deformed hexagonal polygonal columnar cavity 11 of the collar 6, the shaft 6 radially expands from the axis. Since the outer peripheries of the bent portions 14, 14 at the center of the pieces 15, 15 of the collar 6 are in contact with the inner wall surface of the hole Y of the concrete X, both ends 15 a, 15 a of the pieces 15, 15 of the collar 6 are Further, the outer periphery of the collar 6 is substantially in contact with the inner wall surface of the hole Y of the concrete X, and the inner wall surface of the deformed hexagonal polygonal columnar cavity 11 and the outer periphery of the wedge 7 are in surface contact. Then, the collar of the anchor is securely fixed to the hole Y of the concrete X. Paste cement is injected into the gap between the outer periphery of the anchor fixed in the hole Y of the concrete X (the outer periphery of the collar 6 and the tip 1a of the deformed bar 1) and the inner wall surface of the hole Y in the concrete X. And fix it securely.
With the above configuration and operation, an anchor that can be manufactured at low cost, has good workability, and can be securely fixed to the hole Y of the concrete X is obtained.

[0020]

Since the anchor collar and the anchor according to the present invention have the above-described structure, they have various effects as listed below. In the collar for an anchor according to the first aspect, a columnar cavity having a polygonal cross section is formed at the distal end portion of the collar, and a thin portion between a side, which is a two-sided joint of the polygonal columnar cavity, and an outer periphery of the collar is elongated. Since the thin part for bursting in the direction is made, the thin part for bursting is ruptured by pressing a frustum-shaped wedge into the polygonal columnar cavity, and the tip of the collar expands in the radial direction from the axis. There is no need to form a slit at the tip, and an inexpensive anchor collar is obtained. Also, when a frustum-shaped wedge is inserted into the polygonal columnar cavity, since a part of the opening of the polygonal columnar cavity and the outer periphery of the wedge are in point contact, the pressure for press-fitting the wedge can be reduced. Regardless, by further press-fitting the wedge, the thin portion for rupture of the collar can be ruptured and expanded, so that an anchor collar having the same function and effect as the conventional anchor collar was obtained. Furthermore, since each piece at the tip of the conventional collar was curved in an arc shape toward the axis, each piece was easily broken when the wedge was pressed in, but a polygonal columnar cavity was formed at the tip of the collar. Because each piece at the tip of the collar after rupture of the thin part for rupture became half-moon-shaped,
A strong anchor collar that does not break even when the wedge is pressed is obtained.

The anchor collar according to the second aspect is the first aspect.
In addition to the effect of the above, the polygonal columnar cavity at the tip of the collar is a columnar cavity with a deformed polygonal cross section. Both ends of each piece are further expanded, and the outer periphery of the wedge and the inner wall surface of the collar and the outer periphery of the collar and the inner wall surface of the concrete hole are in surface contact, so that the collar is securely and firmly fixed to the concrete hole. Color was obtained.

The anchor of the third aspect is an anchor in which the collar for the anchor of the first aspect is attached to the tip of the deformed rod. Thus, an anchor having the effect of the collar for the first aspect is obtained.

The anchor according to the fourth aspect is an anchor in which the collar for the anchor according to the second aspect is attached to the distal end portion of the deformed rod. Thus, an anchor having the effect of the collar for the second aspect is obtained.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an anchor bolt according to the present invention.

FIG. 2 is a cross-sectional view showing the vicinity of the lower end of the collar in a state where a wedge is inserted into a hole of a collar of the anchor according to the present invention and inserted into a hole formed in concrete on which the anchor is laid.

FIG. 3 shows a wedge inserted into a hole of a collar of an anchor according to the present invention, inserted into a hole formed in concrete on which the anchor is laid, and a vicinity of a lower end of the collar in a state where the wedge is pressed into the hole of the collar. Cross section shown

FIG. 4 is a cross-sectional view showing the vicinity of the lower end of the collar in a state where a wedge is inserted into a hole of a collar having a different shape in the anchor according to the present invention;

FIG. 5 is an exploded perspective view of the anchor according to the present invention.

FIG. 6 is a cross-sectional view showing the vicinity of the lower end of the collar in a state where a wedge is inserted into the hole of the collar of the anchor according to the present invention and inserted into the hole formed in the concrete on which the anchor is laid.

FIG. 7 shows the vicinity of the lower end of the collar in a state where a wedge is inserted into the hole of the collar of the anchor according to the present invention, inserted into the hole formed in the concrete on which the anchor is laid, and the wedge is pressed into the hole of the collar. Cross section

FIG. 8 shows a wedge inserted into a hole of a collar of the anchor according to the present invention, inserted into a hole formed in concrete on which the anchor is laid, and a vicinity of a lower end of the collar in a state in which the wedge is pressed into the hole of the collar. Cross section shown

FIG. 9 is an exploded perspective view of a conventional example.

FIG. 10 is a cross-sectional view showing a state in which a wedge is inserted into a conventional collar.

FIG. 11 is an enlarged cross-sectional view of a conventional example of a main part of a collar.

FIG. 12 is a longitudinal sectional view showing a state where an anchor is inserted into a hole in concrete.

[Explanation of symbols]

X ····· Concrete Y ····· Concrete hole 1 ····· Deformed bar 1a ···· One end of the deformed bar 2 ····· Iron bar that is an iron round bar as a color material 3 ... a cylindrical hole at one end of the collar 4 ... a columnar cavity with a polygonal cross section at the tip of the collar 4a ... a two-sided joint of the polygonal columnar cavity Side 5: Thin section for rupture 6: Collar 6a: Each piece of collar ruptured by thin section for rupture 7: Frustum-shaped (generally frustoconical) Wedge 11: Deformed hexagonal polygonal columnar cavity 12: A vertex of triangle of polygonal columnar cavity having a substantially regular triangular deformed hexagonal shape 13: Very thin thick portion, that is, thinner for bursting Part 14 ····································································································· End pieces 15a Both ends of collar tip 16 Inner wall surfaces near both sides of bent part of each piece of collar tip

Claims (4)

[Claims] 1. A collar having a base formed with a hole for attaching a tip end of a deformed rod, and a pillar having a polygonal cross section formed at the tip end, the side being a two-side joint of the polygonal columnar cavity. The thin portion between the outer periphery of the collar and the outer periphery of the collar is a thin portion for bursting in the longitudinal direction, and the thin portion for burst is ruptured by pressing a frustum-shaped wedge into the polygonal columnar cavity, and the tip of the collar is the axis center. The collar for the anchor, characterized in that it expands in the radial direction. 2. A collar having a base formed with a hole for attaching a tip end of a deformed rod, and a collar having a columnar cavity having a deformed polygonal cross section at the tip end, and a two-sided joint of the deformed polygonal columnar cavity. The thin part between a certain side and the outer periphery of the collar is the thin part for rupture in the longitudinal direction. The thin part for rupture is ruptured by pressing a frustoconical wedge into the deformed polygonal columnar cavity, and the tip of the collar The collar for the anchor, characterized in that it expands radially from the axis. 3. A deformed rod and a hole for mounting a tip of the deformed rod are formed at a base, a columnar cavity having a polygonal cross section is formed at the tip, and a two-sided joint of the polygonal columnar cavity is formed. A collar whose thin portion between a certain side and the outer circumference is a thin portion for rupture in the longitudinal direction, and the thin portion for rupture is ruptured by being pressed into a polygonal columnar cavity of the collar, and the tip of the collar is displaced from the axis. A frustum-shaped wedge that diverges in a radial direction. 4. A deformed rod and a hole for attaching a tip end of the deformed rod are formed at a base, and a columnar cavity having a deformed polygonal cross section is formed at the tip end, and two-sided joining of the deformed polygonal columnar cavity is performed. The thin part between the side and the outer circumference is the thin part for rupture in the longitudinal direction, and the thin part for rupture is ruptured by pressing into the deformed polygonal columnar cavity of the collar, and the tip of the collar is A frustoconical wedge diverging radially from the axis.