JPH0716089Y2 - Anchor rivets - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor rivet whose one side can be attached to a through hole in a wall surface by work that is obvious, and more specifically to an attachment rivet without damaging the wall material. The present invention relates to a technique for improving mounting efficiency and facilitating mounting.

[0002]

2. Description of the Related Art In recent years, an anchor rivet has been provided which can be attached to a through hole provided in a wall material by an attaching operation from the surface side of the wall. Then, a mounting tool such as a bolt can be connected to the anchor rivet attached to the wall material by screwing, so that other members can be indirectly attached to the wall material having low strength. . As this conventional anchor rivet, as shown in FIGS. 14 and 15, a sleeve 4 formed by providing a flange piece 3 at one end of a tubular body 2 and a pin 5 inserted into an insertion hole 1 of the tubular body 2. And has a head 6 formed at the end of the pin 5 to have a diameter substantially equal to the outer diameter of the cylindrical body 2 and larger than the inner diameter of the insertion hole 1. The shaft portion is provided with a concave groove 7 which is cut by a constant tension to separate the head 6 and the shaft portion of the pin 5. And as for attachment to the wall material 11, as shown in FIG. 16, the pin 5 is inserted in the cylinder body 2 and the cylinder body 2 is attached to the wall material 1.
1 is inserted into the through hole 11a of the cylindrical body 2 and tension is applied to the pin 5 so that the head 6 enters the through hole 1 of the cylindrical body 2 with the flange piece 3 of the cylindrical body 2 in contact with the opening edge of the through hole 11a. The movement of the pin 5 causes the head 6 to enter the insertion hole 1 to push and widen the tubular body 2. By pushing and spreading the tubular body 2, the outer surface of the tubular body 2 is covered with the wall material 11. The pin 5 is pressed against the opening edge on the back surface side of the through hole 11a, and by further applying a strong tension to the pin 5, the shaft portion of the pin 5 is cut by the groove 7 to separate the head 6 from the shaft portion, 4, the outer surface of the cylindrical body 2 is pressed against the back plate material 11b of the wall material 11, and the wall material 11 is sandwiched so that the wall material 11 can be mounted by the work from the front side. .

[0003]

However, in the conventional example as described above, the outer surface of the cylindrical body 2 that has been expanded is pressed against the opening edge of the back plate material 11b of the wall material 11. However, as shown in FIG. 17, stress is intensively applied to the end portion of the back plate material 11b, and the end portion of the back plate material 11b is dented, cracked, or deformed. However, there is a problem that the strength of the mounting portion is reduced and the mounting strength of the tubular body 2 is also low. Further, when the back plate material 11b is a soft material such as a wool material or a sheet material, the tubular body 2 is used. There is a problem in that the sleeve 4 is in a rattling state due to the deformation of the back plate material 11b as the blade expands, and the sleeve 4 cannot be securely mounted. For this reason, as shown in FIG.
It is conceivable to arrange the plain washer 14 on the back surface of b,
In this case, the work is performed from the front surface side and the back surface side of the wall material 11, and there is a problem that the attachment cannot be performed only by the work from the front surface side of the wall material 11, which is not practical.

SUMMARY OF THE INVENTION The present invention is intended to solve the above problems and provides an anchor rivet that can be easily mounted while improving the mounting strength without damaging the wall material. To do.

[0005]

According to the present invention, in order to achieve the above object, a sleeve 4 having a flange piece 3 provided at one end of a cylindrical body 2 having an insertion hole 1, and an insertion hole 1 of the sleeve 4. And the inner diameter of the insertion hole 1 of the cylindrical body 2 is substantially the same as the outer dimension of the cylindrical body 2 at the end of the pin 5 located at the other end of the cylindrical body 2. In the anchor rivet in which the head 6 for expanding the insertion hole which is larger than the above is provided and the groove portion 7 which is cut by a constant tension is provided in the shaft portion of the pin 5, the insertion hole 1 A guide surface 8 that is inclined inward is provided.
At regular intervals in the inner circumferential direction of the cylinder 2 so as to be continuous with
A plurality of cutting grooves 9 are provided so as to be adjacent to each other along the longitudinal direction of the insertion hole 1, and an end portion of the cutting groove 9 is provided at one end of the tubular body 2.
Arranged so as to be close to the flange piece 3 that has been cut,
The cutting groove 9 is formed on the lower part of the head 6 so as to correspond to the position of the groove 9.
A guide portion 10 including a cutting corner portion 10a for cutting and expanding the cylindrical body 2 along the above is provided.

[0006]

The anchor rivet, however, inserts the tubular body 2 into the through hole 11a provided in the wall member 11 with the pin 5 inserted into the sleeve 4, and abuts the flange piece 3 against the opening edge of the through hole 11a. The head 6 is pulled into the cylindrical body 2 by pulling the pin 5
When the head 6 is thus drawn into the insertion hole 1 of the tubular body 2, the cutting corner portion 10 that constitutes the guide portion 10 provided at the lower portion of the head 6 is inserted.
To move along the cutting groove 9 provided in the inner surface of the hole 1
The cutting groove 9 is cut by the
A plurality of cutting pieces 12 having a predetermined width are cut along and spread.
This means that the cylindrical body 2 is cut and expanded at the cutting corner 10a.
Each cutting piece 12 cut together with is pushed outward by the head 6.
And each cutting piece 12 causes a stress release on the inner surface and causes curling.
It will be rubbed, and this curled cutting piece 12 will be the wall material 11.
The curled cutting piece 12 and the curl which are brought into contact with the back plate material 11b of the
By sandwiching the object to be sandwiched such as the wall material 11 with the lunge piece 3.
The sleeve 4 is fixed, and is held in this way.
A case in which an object is sandwiched and the sleeve 4 is attached to the through hole 11a
By adopting, the through hole 11a is pushed into the through hole 11a of the wall material 11.
The sleeve 4 is securely and easily fixed without the stress such as spreading being concentrated .

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the illustrated embodiments. As shown in FIG. 1, the anchor rivet mainly comprises a sleeve 4 made of aluminum and a pin 5 made of stainless steel which is detachably attached to the sleeve 4. The sleeve 4 is formed by a tubular body 2 having an insertion hole 1 as shown in FIG. 2, and a flange piece 3 is projected from one end of the tubular body 2 toward the side. The insertion hole 1 is provided at the other end of the cylindrical body 2.
A guide surface 8 that is inclined inward is provided, and the inner surface of the insertion hole 1 formed in the tubular body 2 is cut along the longitudinal direction of the tubular body 2 as shown in FIG. The groove 9 is recessed. The pin 5 is formed by providing a hemispherical head 6 at the end of the shaft portion. The head 6 is formed to have substantially the same diameter as the outer diameter of the cylindrical body 2 and is larger than the inner diameter of the insertion hole 1. Has been formed. At the lower part of the head 6, there is provided a guide portion 10 that comes into contact with the guide surface 8 when the shaft portion of the pin 5 is inserted into the insertion hole 1. As shown in FIGS. 10 and 11, cutting corners 10a having acute angles are provided at the four corners of the guide 10 so as to correspond to the positions of the cutting grooves 9. The shaft portion of the pin 5 is provided with a groove 7 for separating the head 6 and the shaft portion by cutting the shaft portion when the pin 5 is pulled and a constant tension is applied to the shaft portion.

When attaching the anchor rivet to the wall member 11, however, the tubular body 2 is inserted into the wall member 11 with the pin 5 inserted into the sleeve 4 as shown in FIGS.
Is inserted in the through hole 11a provided in the through hole 11a and the flange 5 of the tubular body 2 is brought into contact with the opening edge of the through hole 11a, and the pin 5 is pulled outward so that the guide portion 10 passes through the guide surface 8. Head 6
When the pin 5 is further pulled in this state, the cutting corner portion 10a of the guide portion 10 enters the cutting groove 9, and the cutting groove 9 is formed as shown in FIG. The tubular body 2 is cut and expanded, and the cut and expanded cutting piece 12 expands with the movement of the pin 5 and contacts the back plate material 11b of the wall material 11 as shown in FIG. It will be. Here, when the head 5 is pulled into the insertion hole 1 by pulling the pin 5, the cutting corner portion 10a cuts and expands the tubular body 2 along the cutting groove 9 to pull the pin 5 with a weak force. Even in this case, the cylindrical body 2 can be cut and expanded along the cutting groove 9. In addition, since the tubular body 2 is heat-treated by forging to have a slightly high hardness, the tubular body 2 is cut and expanded at the cutting corner portion 10a and the cut piece 12 cut by the head 6 is outwardly moved. When pressed, the cutting piece 12 causes stress release on the inner surface and rolls into elongation, causing curl as shown in FIG. 5 to form a rolled-in state, and in this state, is pressed against the surface of the back plate material 11b. It will be different. Then, when the pin 5 is further pulled, the shaft portion of the pin 5 is cut at the concave groove portion 7 and the head 6 and the shaft portion are separated, and the cutting piece 1 expanded at this point.
2 is pressed against the surface of the back plate material 11b and the base of the cut piece 12 is pressed against the opening edge of the through hole 11a.
Is attached to the wall material 11, and the wall is formed by the flange piece 3 and the cutting piece 12 abutted on the back plate material 11b and the base of the cutting piece 12 without stress being intensively applied to the opening edge of the through hole 11a. The material 11 is to be attached while being sandwiched.

In the illustrated embodiment, the cutting grooves 9 are provided on the inner surface of the insertion hole 1 at four places, but the present invention is not limited to this, and four or more places or four. It may be less than or equal to the location, and FIG.
2 and FIG. 13, the cutting corners 10a provided on the guide portion 10 are provided at three locations when the cutting grooves 9 are provided at three locations in the insertion hole 1. Is shown. Even in the case of such a configuration, the same effect as that of the above-described embodiment can be obtained.

[0010]

As described above, according to the present invention, the other end of the cylindrical body is provided with the guide surface which is inclined obliquely toward the inside of the insertion hole, and is fixed in the inner circumferential direction of the cylindrical body so as to be continuous with the guide surface. while
A plurality of cutting grooves were provided along the longitudinal direction of the insertion hole so as to be adjacent to each other at intervals, and the ends of the cutting grooves were provided at one end of the cylindrical body.
Place it so that it is close to the flange piece,
Since a guide portion consisting of a cutting corner portion for cutting and expanding the cylinder along the above-mentioned cutting groove is provided in the lower part of the head so as to correspond to the placement , the sleeve is fixed to the wall member by cutting into a plurality of pieces. This is done by sandwiching the wall material between each of the cut pieces and the flange pieces that are brought into contact with the surface of the back plate material, that is, so that they are adjacent to each other at regular intervals in the inner circumferential direction.
Guide along the cutting groove that is recessed along the longitudinal direction of the insertion hole.
The length of the cylinder is increased by the movement of the cutting corner as the id part.
If it is cut and separated along the hand direction to a specified width,
When each of the cut pieces cut by the
Each cut formed by cutting to a predetermined width along the longitudinal direction of
The fragments cause stress release on the inner surface and similarly curl.
It will be rubbed, and each curled cutting piece and flange piece
The sleeve is fixed by holding the object such as wall material with and
In this way, the object to be pinched is sandwiched and slipped.
By adopting a form in which the cable is attached to the through hole of the wall material,
The stress that spreads the through hole is concentrated on the through hole of the
Therefore, it is possible to easily and surely perform the attachment while improving the attachment strength without damaging the object to be sandwiched .

[Brief description of drawings]

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

FIG. 2 is a partially cutaway perspective view of the above sleeve.

FIG. 3 is a front sectional view of the above.

4 is a cross-sectional view taken along the line AA in FIG.

FIG. 5 is a cross-sectional view showing the same effect.

FIG. 6 is an exploded perspective view showing the attachment position of the above.

FIG. 7 is a perspective view showing the same effect.

FIG. 8 is a cross-sectional view showing a mounting state of the same.

FIG. 9 is a partially cutaway front view of the above pin.

10 is a sectional view taken along line BB in FIG.

FIG. 11 is a perspective view of the same head.

FIG. 12 is a sectional view of another embodiment of the above.

FIG. 13 is a perspective view of the same head.

FIG. 14 is a half sectional view of a conventional example.

FIG. 15 is an exploded sectional view of the above.

FIG. 16 is a cross-sectional view showing the attachment procedure of the above.

FIG. 17 is a cross-sectional view showing an attached state of the above.

FIG. 18 is a sectional view showing another embodiment of the above.

[Explanation of symbols]

 1 Insertion Hole 2 Cylindrical Body 3 Flange Piece 4 Sleeve 5 Pin 6 Head 7 Recessed Groove 8 Guide Surface 9 Cutting Groove 10 Guide Part

Claims (1)

[Scope of utility model registration request] 1. A sleeve which has a flange piece provided at one end of a tubular body having an insertion hole, and a pin which is inserted into the insertion hole of the sleeve. At the end of the pin located at the other end of the tubular body. A recessed groove, which is approximately the same as the outer dimension of the cylinder and is larger than the inner dimension of the through hole of the cylinder, is provided with a head for expanding the insertion hole, and the shaft portion of the pin is cut by a constant tension. In the anchor rivet provided with, a guide surface that is inclined obliquely toward the inside of the insertion hole is provided at the other end of the tubular body, and one end in the inner circumferential direction of the tubular body is continuous with the guide surface.
A plurality of cutting grooves are provided along the longitudinal direction of the insertion hole so that they are adjacent to each other at regular intervals, and the end of the cutting groove is provided at one end of the cylindrical body.
Placed close to the cut flange piece,
An anchor rivet provided with a guide portion having a cutting corner portion for cutting and expanding the cylindrical body along the cutting groove so as to correspond to the position of .