JP2000233887A - Anchor and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchor capable of being formed easily and obtaining stabilized quality easily. SOLUTION: An anchor base material 18, provided with an almost cylindrical shape body part 12 with a support part 13 protruded in flange at one end, is attached to a press-forming device after preheating the other side of the body part 12. The heated body part 12 is fitted into an insert hole 9 on a plate part 2 to attach the plate part 2. Then the heated body part 12 is crushed into a drilled part 7, in the plate part 2 to press and form a coming-off stopping part 15 with a diameter larger than that of the insert hole 9 to hold at the edge of the insert hole 9. At forming of the coming-off stopping part 15, the material flowing is caused, and a positioning part 16 with a diameter larger than that of the insert hole 9 for stopping at the edge is formed to swell out. The plate part 2 is held and fixed by the coming-off stopping part 15 and positioning part 16. The plate part 2 and the anchor part 3 are connected integrally. They can be connected easily by only inserting and press-forming without requiring special skills such as welding, and a prescribed connecting strength can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor having a substantially plate-shaped plate attached to one end of a substantially columnar anchor.

[0002]

2. Description of the Related Art Conventionally, as an anchor of this type, for example, an anchor 41 as shown in FIGS. 8 and 9 has been known.
The anchor 41 shown in FIGS. 8 and 9 is formed in a substantially disk shape at one end in the axial direction of the substantially cylindrical body portion 42, is exposed from a member to be attached such as a concrete product, and is separately locked by a hook or the like. Support portion for hanging and supporting the attached member
43 includes an anchor portion 44 provided integrally. Also,
At the other end of the anchor portion 44, a substantially plate-shaped plate portion 45 to be embedded in the attached member is integrally attached by welding.

[0003] When manufacturing the anchor 41,
The other end of the anchor portion 44 in which the support portion 43 is provided at one end in advance is inserted into an insertion hole 47 which is formed at the substantially center of the plate portion 45 in advance, and the axis of the anchor portion 44 with respect to the plane of the plate portion 45 is inserted. An anchor is formed by welding the other end side of the anchor portion 44 and the edge portion of the insertion hole 47 of the plate portion 45 so that the directions are substantially vertical.

[0004]

However, in the conventional anchor 41 shown in FIGS. 8 and 9, the axial direction of the anchor portion 44 is oblique to the plate portion 45 depending on the skill of the welding operator. The connection strength is inclined or the connection strength between the plate part 45 and the anchor part 44, that is, the plate part
Variations occur in the pullout resistance of the anchor part 44 with respect to 45,
Stable quality cannot be obtained, and the yield cannot be improved.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an anchor which can be easily formed and has stable quality.

[0006]

According to a first aspect of the present invention, there is provided an anchor having a plate portion having an insertion hole, formed substantially in a plate shape, and fixed to a member to be mounted, and a shaft inserted into the insertion hole of the plate portion. One end in the direction is exposed from the member to be attached, a substantially columnar body portion, an intermediate portion of the body portion, which is located at the other end side in the axial direction, is formed so as to bulge out from the insertion hole and has a diameter larger than that of the insertion hole. A positioning portion that locks to an edge, and after the other end in the axial direction of the body portion is inserted into the insertion hole, is pressed and molded to be larger in diameter than the insertion hole and is locked to the other axial edge of the insertion hole. And an anchor portion having a retaining portion for clamping and fixing the plate portion with the positioning portion.

The other end of the substantially columnar body portion of the anchor portion is formed in the insertion hole of the substantially plate-shaped plate portion at the middle portion of the body portion at the other end in the axial direction so as to be larger in diameter than the insertion hole. After inserting the positioning part that has been inserted until it comes into contact with one edge of the insertion hole, the retaining part is pressed and molded to a diameter larger than the insertion hole, the plate part is pinched and fixed between the positioning part and the retaining part, and the anchor part and the plate part are fixed. Are integrally connected without requiring any special technique such as welding, and a constant connection strength can be obtained.

According to a second aspect of the present invention, there is provided an anchor having a substantially plate-like shape having an insertion hole and fixed to a member to be mounted.
A substantially columnar body portion that is inserted into the insertion hole of the plate portion and one end in the axial direction is exposed from the attached member, and the other end in the axial direction of the body portion is inserted through the insertion hole after the insertion hole. A retaining portion which is pressed and molded to a large diameter and is locked to one edge in the axial direction of the insertion hole, and the axial direction of the insertion hole which is larger in diameter than the insertion hole due to a flesh flow at the time of press molding of the retaining portion. And an anchor portion provided with a positioning portion which is formed on the other edge side and swells and fixes the plate portion with the retaining portion.

After the other end of the substantially columnar body portion of the anchor portion is inserted into the insertion hole of the substantially plate-shaped plate portion, a retaining portion which is engaged with one edge of the insertion hole with a diameter larger than the insertion hole is provided. Along with the pressure molding, a positioning portion which is engaged with the other edge of the insertion hole to be larger in diameter than the insertion hole is formed by bulging due to a flow of meat at the time of press molding of the retaining portion, and a plate portion is formed by the positioning portion and the retaining portion. , And the anchor portion and the plate portion are integrally connected to each other, so that they can be easily connected without requiring any special technique such as welding, and a certain connection strength can be obtained.

[0010] According to a third aspect of the present invention, in the anchor according to the first or second aspect, the plate portion is formed so as to protrude in a substantially conical shape whose diameter decreases toward the front end on one surface side, and an insertion hole is formed at the front end. It has an opening cone.

Further, since the plate portion is provided with a substantially conical portion which projects toward the front end on one surface side to a small diameter and opens the insertion hole at the front end portion, the plate portion is securely locked in the insertion hole without increasing the size. A retaining portion that is prevented from coming off is easily formed.

According to a fourth aspect of the present invention, there is provided the anchor according to any one of the first to third aspects, wherein the body has an indication at one end exposed from the attached member.

Since the indication is provided at one end of the body portion exposed from the member to be attached, it is easy to confirm the quality, for example, even when the body is buried in the member to be attached. It can be formed, and can be formed by cold forging, which can deeply engrave the display portion at the time of press-molding the retaining portion, thereby improving the manufacturability.

According to a fifth aspect of the present invention, in the method of manufacturing an anchor, one end in the axial direction of the substantially cylindrical body is inserted into an insertion hole of the substantially plate-shaped plate, and the fitted body is inserted. Pressing the end portion of the portion penetrating from the insertion hole, and press-molding a retaining portion that is larger in diameter than the insertion hole and is locked to one edge of the insertion hole, and at the time of press-molding the retaining portion, A positioning portion which is larger in diameter than the insertion hole, is locked to the other edge of the insertion hole, and swells and forms a positioning portion for holding and fixing the plate portion with the retaining portion.

After the other end of the substantially columnar body portion of the anchor portion is inserted through the insertion hole of the substantially plate-shaped plate portion, a retaining portion which is engaged with one edge of the insertion hole with a diameter larger than the insertion hole is provided. Along with the pressure molding, a positioning portion which is engaged with the other edge of the insertion hole to be larger in diameter than the insertion hole is formed by bulging due to a flow of meat at the time of press molding of the retaining portion, and a plate portion is formed by the positioning portion and the retaining portion. , And the anchor portion and the plate portion are integrally connected to each other, so that they can be easily connected without requiring any special technique such as welding, and a certain connection strength can be obtained.

According to a sixth aspect of the present invention, there is provided a method for manufacturing an anchor, comprising: a plate having a substantially columnar shape and one end in the axial direction of a body portion having a positioning portion bulging along an outer peripheral surface along a circumferential direction; The positioning portion is inserted into the insertion hole of the portion until the positioning portion contacts one edge of the insertion hole, and an end portion of the inserted body portion penetrating from the insertion hole is pressed to have a diameter larger than that of the insertion hole. Then, a retaining portion which is locked to the other edge of the insertion hole and clamps and fixes the plate portion with the positioning portion is press-molded.

The other end of the substantially columnar body portion of the anchor portion is formed in the insertion hole of the substantially plate-shaped plate portion at the middle portion of the body portion at the other end in the axial direction so as to be larger in diameter than the insertion hole. After inserting the positioning part that has been inserted until it comes into contact with one edge of the insertion hole, the retaining part is pressed and molded to a diameter larger than the insertion hole, the plate part is pinched and fixed between the positioning part and the retaining part, and the anchor part and the plate part are fixed. Are integrally connected without requiring any special technique such as welding, and a constant connection strength can be obtained.

According to a seventh aspect of the present invention, in the method for manufacturing an anchor according to the fifth or sixth aspect, the plate portion has an inclined surface which becomes smaller in diameter toward one end toward the tip and expands toward the other surface. A projection is formed in a substantially conical shape having a conical portion, and has a conical portion that opens an insertion hole at a tip portion. The retaining portion is located on the inclined surface side of the conical portion and is pressed and molded.

An inclined surface of a substantially conical shape formed in a plate portion having an inclined surface projecting toward the front end with a small diameter on one surface side and expanding on the other surface side and having an insertion hole opened at the front end portion. Since the retaining portion is press-molded at the surface side, the retaining portion that is securely locked in the insertion hole and prevented from falling out without being enlarged is easily formed.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an anchor according to the present invention will be described below with reference to the drawings.

1 to 3, reference numeral 1 denotes an anchor.
The anchor 1 is a substantially plate-shaped plate portion 2 embedded in a concrete block (not shown) as a member to be mounted, and is integrally and substantially vertically attached to the plate portion 2 so that one end side is exposed from the concrete block. An anchor unit 3 is provided.

The plate portion 2 is formed of, for example, a metal plate such as a steel plate, and both longitudinal edges of the substantially rectangular flat plate portion 5 are bent substantially perpendicularly to one surface, respectively. 6 is formed in a substantially plate shape. In addition, in the approximate center of the plate portion, a substantially truncated cone is formed in the direction in which the bent portion 6 is bent, that is, in such a manner that the bent portion 6 expands in the direction opposite to the bent direction. A cone 7 is formed in a funnel shape. The side on which the conical portion 7 expands is the inclined surface 8. Further, a substantially round hole-shaped insertion hole 9 is formed through the top of the conical portion 7, which is substantially at the center. A plurality of punching portions 10 are formed in the plate portion 5 so as to surround the conical portion 7.

On the other hand, the anchor part 3 is formed of a steel material such as austenitic stainless steel (about SUS200 to 300) or carbon steel, and can be inserted into the insertion hole 9 of the plate part 2, ie, the diameter of the insertion hole 9 It has a substantially cylindrical body portion 12 having substantially the same dimensions as or less. Further, a support portion 13 which is larger in diameter than the body portion 12 and protrudes in a flange shape is integrally formed at one end of the body portion 12 in the axial direction. In addition, the torso
At the other end in the axial direction of 12, a flat cone having a taper surface 14 having a diameter larger than the diameter of the insertion hole 9, projecting like a flange, and located in the conical portion 7 of the plate portion 2 and abutting against the inclined surface 8. The trapezoidal retaining portion 15 is integrally formed by press molding, that is, press molding. Also, on the outer circumferential surface of the body portion 12 in the axial direction,
On the other end side, a positioning portion 16 bulging and formed in a flange shape along the circumferential direction and having a diameter larger than the insertion hole 9 of the plate portion 2 is integrally provided at a position at a predetermined distance from the retaining portion 15. . The positioning portion 16 is provided along the circumferential direction such that the surface formed by the edge on the retaining portion 15 side is substantially perpendicular to the axial direction of the body portion 12.

The anchor portion 3 is locked by the positioning portion 16 abutting on one edge of the plate portion 2 where the conical portion 7 of the insertion hole 9 protrudes, and the tapered surface 14 of the retaining portion 15 is The axial direction of the plate portion 2 is such that the plate portion 2 is brought into contact with the inclined surface 8 of the conical portion 7 of the portion 2, latches on the other edge of the insertion hole 9, and holds and fixes the plate portion 2 between the positioning portion 16 and the retaining portion 15. Anchor 1 is integrally connected substantially perpendicularly to the plane direction of.

Also, a support portion provided at the end of the body portion 12
The end face of 13, for example, displays the useful tonnage, height, etc.
17 are formed at the same time as the retaining portion 15 is pressed and formed by cold forging, for example.

Next, the operation of forming the anchor 1 will be described.

First, a support portion is attached to one end of the body portion 12 in advance.
The other end of the anchor base material 18 provided with 13 is mounted on the press molding machine 21. As shown in FIGS. 4 to 6, the press molding machine 21 includes a lower mold 22 and an upper mold 23 that can move forward and backward toward the lower mold 22, that is, moves upward and downward.

The lower mold 22 has a pair of lower mold parts 25, 25 which are opposed to each other in a horizontal direction substantially perpendicular to the vertical direction, and which move toward and away along the opposed direction. Also, the lower mold part 25
A support holding recess for receiving and holding the support 13 of the anchor base material 18 in a state where the pair of lower mold portions 25, 25 are joined to each other.
A first concave portion 27 that constitutes 26 is provided. Further, a second concave portion 29 which constitutes a body portion holding concave portion 28 for accommodating and holding a part of the body portion 12 of the anchor base material 18 in a state where the lower mold portions 25, 25 are joined to the first concave portion 27. Is provided. Further, a third concave portion 31 constituting an expanding conical portion holding concave portion 30 capable of accommodating the conical portion 7 of the plate portion 2 in a state where the lower mold portions 25 are joined to each other is connected to the second concave portion 29. Is provided.
Further, between the second concave portion 29 and the third concave portion 31, the body holding concave portion is located at a position corresponding to the positioning portion 16 of the anchor portion 3.
A fourth concave portion 33 that forms the bulge forming portion 32 having a diameter larger than 28 is provided.

On the other hand, the upper die 23 is formed in a substantially columnar shape having an axial direction in the vertical direction which is the reciprocating direction, and is movable along the axial direction.

Then, the anchor base material 18, which is previously heated on the part opposite to the support part 13, is located between the separated lower mold parts 25, 25, and as shown in FIG. , 25 in the opposite direction to hold the anchor base material 18 in the lower mold 22.
Thereafter, the body portion 12 held by the lower mold 22 and projected from the lower mold 22 from the side where the conical portion 7 protrudes into the insertion hole 9 of the plate portion 2 formed in a substantially plate shape in advance by pressing, for example. The tip portion on the end side is inserted, and the conical portion 7 is inserted into the conical portion holding concave portion 30 of the lower die 22, and the plate portion 2 is placed on the lower die 22. In this state, the anchor base material 18 is held so that the axial direction thereof is substantially perpendicular to the plane direction of the plate portion 5 of the plate portion 2. The anchor base material may be heated after the insertion holes 9 of the plate portion 2 are inserted.

Thereafter, the upper die 23 is lowered, and the other end of the anchor base material 18 protruding from the side where the conical portion 7 expands is pressed so as to be crushed in the direction in which the conical portion 7 protrudes. , Retaining part 15
Is pressed. When the retaining portion 15 is pressed, as shown in FIG. 5, a flesh flow occurs in the bulging portion 32 which is a gap between the lower die 22 and the anchor base material 18, and as shown in FIG. Thus, the positioning part 16 is molded together with the retaining part 15. By this press molding, the plate portion 2 is sandwiched and fixed by the positioning portion 16 and the retaining portion 15 to be connected, and the anchor 1 is formed.

When the upper mold 23 is processed and pressed,
The display 17 is formed at the same time at an engraved portion (not shown) which is provided at a position corresponding to the end face of the support portion 13 of the lower mold 22 and forms a display.

As described above, after the other end of the substantially columnar body portion 12 is inserted into the insertion hole 9 of the substantially plate-shaped plate portion 2, it is engaged with one edge of the insertion hole 9 with a diameter larger than that of the insertion hole 9. The retaining portion 15 to be pressed is molded, and a positioning portion 16 is formed to be engaged with the other edge of the insertion hole 9 to be larger in diameter than the insertion hole 9 by the flow of the meat, and the plate portion 2 is formed by the positioning portion 16 and the retaining portion 15. In order to integrally connect the anchor part 3 and the plate part 2
For example, it is possible to easily connect by inserting and press-molding the substantially columnar body part 12 without requiring special techniques such as welding, and it is possible to improve manufacturability, and a constant connection strength is easy without requiring skill. Is obtained.

The plate portion 2 has a slanting surface 8 which projects toward the front end with a small diameter on one surface side and expands toward the other side, and has a substantially conical shape having an insertion hole 9 at the front end. In order to press-mold the retaining portion 15 on the inclined surface 8 side of the conical portion 7 so as to be crushed into the conical portion 7, for example, when simply press-molding the flat portion, the retaining portion 15 is lightweight and compact. If it is formed thin, the desired pull-out resistance cannot be obtained, and if it is formed thick, as in the case of the support portion 13, the weight increases and a large pressing force is required, making it impossible to improve the productivity. In the above-described embodiment in which the pressure molding is performed in the portion 7, a large pull-out resistance can be obtained without increasing the size, and the retaining portion 15 that can be securely locked without increasing the weight can be easily formed, and the manufacturability can be improved. Can be improved.

Furthermore, since the display 17 is provided on the end face of the support portion 13 exposed from the member to be mounted such as a concrete block, the anchor 1 can be easily checked even after the concrete block is molded, for example, the tonnage of the anchor 1 can be easily checked.
It can be formed at the same time as the press molding of No. 15 and the productivity can be improved. In this simultaneous molding, since cold forging that allows deep engraving can be performed, clear indication 17 can be easily and reliably formed.

In the above embodiment, a concrete block is used as a member to be attached. However, for example, a synthetic resin is used. In general, any method of attaching an anchor, such as using the anchor 1 as an anchor bolt, can be used.

In the above description, the conical portion 7 is provided on the plate portion 2. However, the plate portion 2 having the flat plate portion 5 may be used.

Further, the bent portion 6 and the punched portion 10 are provided on the plate portion 2, but may be any shape that is entangled with the concrete block, or may not be provided.

On the other hand, the body 12 is formed in a substantially cylindrical shape.
For example, it may be prismatic.

Further, the retaining portion 15 is pressed and molded in a flange shape. However, the retaining portion 15 is locked to the edge of the insertion hole 9 so as to be removable.
Any shape may be used, such as a shape that protrudes in a claw shape from the outer peripheral surface of 12 and has a large diameter. According to this configuration, pressing can be performed with a force smaller than the pressing force for crushing the entire end portion of the body portion 12, and the manufacturability can be improved.

Similarly, the positioning portion 16 is not limited to a configuration in which the positioning portion 16 is formed to protrude into a flange shape in the circumferential direction, but protrudes in a claw shape from the outer peripheral surface of the body portion 12 and becomes large in diameter and is locked to the edge of the insertion hole 9. Any possible configuration may be used.

Further, the description has been given by providing the body portion 12 with the support portion 13 which protrudes in a flange shape with a large diameter. The support portion 13 is formed in a ring shape, in a hook shape, or in the shape of the body portion 12. Any shape, such as a through-hole that partially penetrates, may be used, and the support 13 may not be provided.

The indication 17 is not limited to cold forging, but may be any forming method. Further, the position is not limited to the end surface of the support portion 13 and may be any position. It is preferable to provide it at a portion exposed from the attached member. Also the support
By providing it on the end face of 13, the display 17 can be easily confirmed.

Next, another embodiment of the present invention will be described with reference to the drawings.

The embodiment shown in FIG. 7 differs from the embodiment shown in FIGS. 1 to 6 in that the positioning portion 16 is provided in the anchor base material 18 in advance.

That is, the anchor base material 35 constituting the anchor portion 2 can be inserted into the insertion hole 9 of the plate portion 2, that is, a substantially cylindrical body portion 12 having a diameter substantially equal to or smaller than the diameter of the insertion hole 9.
have. A support portion 13 which is larger in diameter than the body portion 12 and protrudes in a flange shape is provided at one axial end of the body portion 12.
Are integrally formed. Further, the other end of the body portion 12 in the axial direction has a tapered surface 14 which is larger than the diameter of the insertion hole 9, protrudes like a flange, is located in the conical portion 7 of the plate portion 2, and contacts the inclined surface 8. The retaining portion 15 having a flat truncated cone shape is integrally formed by press molding, that is, press molding. In addition, the outer peripheral surface in the axial direction of the body portion 12 is expanded at the other end side into a flange shape along the circumferential direction which is larger in diameter than the insertion hole 9 of the plate portion 2 at a position at a predetermined distance from the retaining portion 15. The protruding positioning portion 16 is provided integrally. It should be noted that the positioning portion 16 has a surface formed by an edge on the side of the retaining portion 15 and the body portion 12.
Are provided along the circumferential direction so as to be substantially perpendicular to the axial direction.

When the anchor 1 is formed, the support member 13 is provided at one end of the body portion 12 and the other end of the anchor base material 18 provided with the positioning portion 16 is heated in advance.
From the side where the conical portion 7 protrudes into the insertion hole 9 of the plate portion 2 formed in advance into a substantially plate shape by, for example, press working, it is inserted until the positioning portion 16 contacts the edge of the insertion hole 9. Then, while holding the plate portion 5 of the plate portion 2 so that the axial direction thereof is substantially perpendicular to the plane direction of the plate portion 5, the side surface of the protruding side of the conical portion 7 is pressed, and the protruding side is protruded from the side where the conical portion 7 expands. The other end of the anchor base material 18 is pressed so as to be crushed in the direction in which the conical portion 7 protrudes, the retaining portion 15 is pressed and molded, and the positioning portion 16 is pressed.
The anchor 1 is formed by connecting the plate portion 2 so as to pinch and fix it with the retaining portion 15.

As described above, the other end of the substantially columnar body 12 is inserted into the insertion hole 9 of the substantially plate-shaped plate 2 at the other end in the axial direction at an intermediate portion of the body 12 and has a diameter larger than that of the insertion hole 9. After inserting the positioning portion 16 bulging into the insertion hole 9 until it comes into contact with one edge of the insertion hole 9, the retaining portion 15 is press-molded to have a diameter larger than that of the insertion hole 9, and the positioning portion 16 and the retaining portion 15 form a plate portion. Since the anchor portion 2 and the plate portion 2 are integrally connected by sandwiching and fixing the anchor 2, the anchor portion 3 and the plate portion 2 can be easily connected without requiring a special technique such as welding, and a constant connection strength can be obtained.

Further, since the positioning portion 16 is provided in the anchor base material 35 in advance, the anchor base material 35 only needs to be inserted into the insertion hole 9 of the plate portion 2 until the positioning portion 16 contacts the edge of the insertion hole 9. The axial direction of the anchor base material 35 is the plate part 2.
Can be easily positioned so as to be substantially perpendicular to the plane direction.

[0050]

According to the first aspect of the present invention, after the body portion of the anchor portion is inserted into the insertion hole of the plate portion until the positioning portion comes into contact with one edge of the insertion hole, the retaining portion is pressed to a large diameter. Molding, sandwiching and fixing the plate part by the positioning part and retaining part, and connecting them integrally, for example, it is possible to easily connect without requiring special techniques such as welding, and to easily obtain a certain connection strength Can be.

According to the second aspect of the present invention, after the body portion of the anchor portion is inserted into the insertion hole of the plate portion, the retaining portion is press-molded to have a diameter larger than that of the insertion hole. Since the positioning part is bulged, the plate part is sandwiched and fixed between the positioning part and the retaining part and connected integrally, so that it can be easily connected without any special technique such as welding, and a certain connection Strength can be easily obtained.

According to the anchor described in claim 3, according to claim 1,
In addition to the effect of the anchor described in 2, the plate portion is provided with a substantially cone-shaped conical portion that protrudes toward the front end with a small diameter and opens the insertion hole at the front end portion. A retaining portion that stops and is prevented from coming off can be easily formed.

According to the anchor described in claim 4, according to claim 1,
In addition to the effect of the anchor according to any one of the above-described items 3, since the indication is provided at one end exposed from the attached member of the body,
For example, it is possible to easily check the quality etc. even in the state of being embedded in the attached member, and it can be formed at the same time as the press-molding of the retaining part, and the cold forging allows the display part to be deeply engraved when the retaining part is pressed. It is possible to improve the productivity.

According to the method of manufacturing an anchor according to the fifth aspect, after the body portion of the anchor portion is inserted into the insertion hole of the plate portion, the retaining portion is press-molded to have a diameter larger than that of the insertion hole, and the insertion hole is formed by meat flow. Since the positioning portion is formed to bulge out to a larger diameter, and the plate portion is sandwiched and fixed by the positioning portion and the retaining portion and integrally connected, for example, it can be easily connected without requiring special techniques such as welding, A constant connection strength can be easily obtained.

According to the method of manufacturing an anchor according to the sixth aspect, after inserting the positioning portion into the insertion hole of the plate portion until the body portion of the anchor portion comes into contact with one edge of the insertion hole, the retaining portion having a large diameter is formed. Press-molding, sandwiching and fixing the plate portion between the positioning portion and the retaining portion, and connecting them integrally, for example, can be easily connected without requiring special techniques such as welding, and easily obtain a certain connection strength. be able to.

According to the method for manufacturing an anchor according to the seventh aspect, in addition to the effect of the method for manufacturing the anchor according to the fifth or sixth aspect, the inclined surface which projects toward the tip with a small diameter and expands toward the other surface is provided. An insertion hole is opened at the tip, and the retaining portion is pressed and molded on the inclined surface side of the substantially conical cone formed in the plate portion, so it is securely locked in the insertion hole without increasing the size A retaining portion that is prevented from falling off can be easily formed.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing an embodiment of an anchor of the present invention.

FIG. 2 is a sectional side view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a sectional view illustrating a step of manufacturing the anchor.

FIG. 5 is a cross-sectional view illustrating a step of manufacturing the anchor.

FIG. 6 is a sectional view illustrating a step of manufacturing the anchor.

FIG. 7 is a front sectional view of an anchor showing another embodiment of the present invention.

FIG. 8 is a front sectional view showing a conventional anchor.

FIG. 9 is a plan view of the same.

[Explanation of symbols]

 1 anchor 2 plate part 3 anchor part 7 cone part 8 inclined surface 9 insertion hole 12 body part 15 retaining part 16 positioning part 17 display

Continued on the front page (72) Inventor Hiroshi Suzuki 2-1701-1 Kounosu, Tenpaku-ku, Nagoya-shi, Aichi F-term in SEFTIX CORPORATION (reference) 3F004 EA11 LA05

Claims (7)

[Claims] 1. A plate portion having an insertion hole, formed in a substantially plate shape, and fixed to a member to be mounted, and a substantially axial end inserted into the insertion hole of the plate portion and exposed from the member to be mounted. A pillar-shaped body portion, a positioning portion which is located at the other end side in the axial direction at an intermediate portion of the body portion, is formed so as to be larger in diameter than the insertion hole, and is engaged with one edge of the insertion hole; After the other end in the axial direction of the portion is inserted into the insertion hole, the portion is pressed and formed to have a diameter larger than that of the insertion hole, locked at the other axial edge of the insertion hole, and sandwiches the plate portion with the positioning portion. An anchor provided with a retaining portion to be fixed. 2. A plate portion having an insertion hole, formed substantially in a plate shape, and fixed to a member to be mounted, and a substantially one end inserted in the insertion hole of the plate portion and having one axial end exposed from the member to be mounted. A pillar-shaped body portion, a retaining portion which is pressed and molded to be larger in diameter than the insertion hole after the other end in the axial direction of the body portion is inserted into the insertion hole, and which is locked to one edge of the insertion hole in the axial direction, and A positioning portion that is formed to be larger in diameter than the insertion hole and bulges to the other edge side in the axial direction of the insertion hole and that the plate portion is sandwiched and fixed with the prevention portion by the flow of the flesh at the time of press molding of the stopper portion. An anchor, comprising: 3. The plate portion has a conical portion that is formed on one surface side in a substantially conical shape whose diameter decreases toward the front end, and has a conical portion that opens an insertion hole at the front end portion. 2
Anchor described. 4. The anchor according to claim 1, wherein the body has an indication at one end exposed from the attached member. 5. An end of the substantially cylindrical body portion in the axial direction is inserted into an insertion hole of a substantially plate-shaped plate portion, and an end of the fitted body portion penetrating through the insertion hole. Pressing the portion to form a retaining portion that is larger in diameter than the insertion hole and that is locked to one edge of the insertion hole, and that when the retaining portion is pressed and formed, the insertion portion is larger in diameter than the insertion hole. A method for manufacturing an anchor, wherein a positioning portion which is locked to the other edge of the hole and clamps and fixes the plate portion with the retaining portion is bulged. 6. An axial end of a body portion formed substantially in a columnar shape and having a positioning portion bulging along an outer peripheral surface along a circumferential direction, and said positioning portion is inserted into an insertion hole of a plate portion formed substantially in a plate shape. The body portion is inserted until it comes into contact with one edge of the insertion hole, and an end portion of the inserted body portion penetrating from the insertion hole is pressed so as to be engaged with the other edge of the insertion hole with a diameter larger than the insertion hole. A method for manufacturing an anchor, wherein a stopper portion for holding and fixing the plate portion with the positioning portion is pressed. 7. The plate portion is formed in a substantially conical shape having an inclined surface which becomes smaller in diameter toward one end on one surface side and expands on the other surface side, and has a conical portion opening an insertion hole at the end portion. The method for manufacturing an anchor according to claim 5, wherein the retaining portion is formed by press-molding while being positioned on the inclined surface side of the conical portion.