JPH0861348A - Tightening tool and cap for tightening tool - Google Patents

Abstract

PURPOSE: To provide a cap for tightening such as a blind rivet which possesses the high sealing performance of an installation hole, maintaining the high tightening force as it is. CONSTITUTION: A blind rivet 1 as tightening tool is encloses a hollow cylindrical body 3 having a flange 2 formed, and a part of the cylindrical body 3 can be deformed so as to be diameter-spread outward in the radial direction. and can be fixed on a panel 14 by a spread diameter part 15 due to this deformation and the flange 2. A cap 9 is installed on the cylindrical body 3, and the cap 9 consists of a cylindrical body part 10 which covers the cylindrical body 3 from the end part on the opposite side to the flange 2, to the flange, and a bulging-out part 11 which bulges outward in the radial direction at the position separated by a prescribed length from the end part continuous to the flange, on the outer surface of the body part, and the body part 10 of the cap 9 is made of plastic.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention includes a hollow tubular body having a flange formed therein, and a portion of the tubular body is deformed so as to radially expand outward, and the deformed expanded body is expanded. Fixed to a mounting member such as a panel by the diameter portion and the flange,
The present invention relates to a fastener such as a blind rivet or a blind nut, and a cap used for the fastener.

[0002]

2. Description of the Related Art A blind rivet is a rivet-shaped hollow cylindrical body having a flange, and a cylindrical body having a diametrical expansion head located at the end opposite to the flange. It consists of a mandrel extending through it. In the fastening operation, the mandrel head is inserted into the hole of the mounting member such as the panel until the flange of the tubular body comes into contact with the mandrel, and the mandrel protruding from the flange breaks at the small diameter part using a tool. It is pulled so strongly that the diameter-expanding head of the mandrel is deformed so as to expand the diameter of the tubular body, and is fixed to the mounting member by the diameter-expanded portion and the flange. Also,
Besides blind rivets, blind nuts are also known. In a blind nut, a female screw is formed inside the tubular body near the end opposite to the flange, and a rod or tool having a male screw is used instead of the mandrel of the blind rivet. In the operation of the fastener, it is screwed into the female thread portion of the tubular body, and the tubular body portion formed with the female thread is strongly pulled toward the flange side, whereby the tubular body is deformed so as to expand its diameter, and this diameter expansion It is fixed to the mounting member by the portion and the flange. Fasteners such as blind rivets and blind nuts are convenient because the fastening operation can be performed from one direction.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Japanese Unexamined Patent Publication No. 0 (1998) discloses a blind rivet in which a tubular body is formed from a flange to have a large diameter for a predetermined length, and the large diameter portion and the enlarged diameter portion are fixed to the panel. This blind rivet can be used as a fixture with a spacer for attaching a corrugated plate to a roof or as a support shaft for a gear. Japanese Unexamined Patent Publication (Kokai) No. 5-346108 discloses a blind rivet in which two flanges are formed on a tubular body and the tubular body portion between both flanges can be used as a support member. These blind rivets have a high fastening force and are convenient not only for connecting panels to each other but also for mounting other articles. However, there is still room for consideration in terms of sealing the mounting holes to the panel. Actual exploitation 54
Japanese Patent No. 127065 discloses a blind rivet in which a tubular body is made of plastic. This blind rivet has a problem that the fastening force is lower than that of the previous blind rivet. In addition, the actual Kaisho 51
Japanese Patent Laid-Open No. 119456 discloses a blind rivet which is made of plastic and can be attached to other articles, but this also has a problem in fastening force.

Therefore, an object of the present invention is to provide a fastener such as a blind rivet which has a high sealing property of a mounting hole while maintaining a high fastening force as it is, and also for a fastener which obtains a high sealing property. To provide a cap.

[0005]

To achieve the above object, according to the present invention, a hollow cylindrical body having a flange is formed, and a part of the cylindrical body expands radially outward. A fastener that can be deformed to have a diameter and is fixed to a mounting member such as a panel by a diameter-expanded portion and a flange due to this deformation, wherein a cap is mounted on the tubular body, and the cap is tubular. The body is covered with a tubular main body that covers from the end opposite to the flange to the flange, and the outer surface of the main body is stretched radially outward at a position separated by a predetermined length from the end adjacent to the flange. A fastener is provided which comprises a projecting overhang and the body of the cap is made of plastic.

Further, according to the present invention, a cap used for a fastener such as a blind rivet, which is a tubular main body portion covering the fastener tubular body from the end opposite to the flange to the flange. And an overhanging portion projecting radially outward on the outer surface of the main body at a position separated from the end adjacent to the tubular body flange by a predetermined length, and the main body of the cap is made of plastic. A featured fastener cap is provided.

[0007]

The fastener is provided with a plastic main body covering the fastener tubular body from the end to the flange and a cap having an overhanging portion at a position separated from the tubular body flange by a predetermined length. The tubular body can be deformed so as to expand its diameter at a position closer to the end of the tubular body than the protruding portion of the cap, and this expanded diameter portion expands the body of the cap, and the mounting hole of the mounting member is The expanded diameter portion of the main body ensures reliable sealing.

In the present invention, the protruding portion of the cap can be formed as a flange having a diameter larger than that of the main body portion. In this case, the cap main body portion has a first diameter larger than that of the fastener flange at an end portion adjacent to the fastener flange. Two flanges can be formed. The projecting portion of the cap can be formed by a large-diameter portion formed to have a larger diameter than the main body portion over the predetermined length. In this case, in the large diameter portion of the cap, a flange having a larger diameter than the large diameter portion can be formed at the end portion adjacent to the fastener flange, and
The large diameter portion may be integrally formed with the main body portion, or the large diameter portion may be formed separately from the main body portion and the large diameter portion may be formed of hard plastic or metal. The body may be a tubular member molded of soft plastic closed at an end opposite the fastener flange. The fastener may be a blind rivet or a blind nut.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment. First, referring to FIGS. 1 and 2, a blind rivet 1 serving as a fastener has a hollow rivet-shaped tubular body 3 having a flange 2 formed at one end thereof, and a diametrical expansion head 5 is provided on the tubular body 3. 2 and a mandrel 6 which is located at the end opposite to the cylindrical body 3 and extends through the cylindrical body 3.
The mandrel 6 and the mandrel 6 are made of metal, and in particular, the tubular body 3 is preferably made of deformable soft metal such as aluminum. A small-diameter portion 7 is formed in a portion of the mandrel 6 hidden in the tubular body 3 and is a portion that breaks when the mandrel 6 is strongly pulled. In order to fasten the blind rivet 1 to the panel, first, the mandrel head 5 is inserted into the tubular body 3 until the flange 2 comes into contact with the mounting hole of the panel. In this state, the exposed portion of the mandrel 6 is gripped by the fastening tool, and the mandrel 6 is pulled so strongly that it breaks at the small diameter portion 7. As a result, the mandrel head 5 deforms a part of the tubular body 3 so as to expand the diameter outward in the radial direction, and is fixed to a mounting member such as a panel by the deformed expanded diameter part and the flange 2. Since such blind rivets themselves are well known,
Further detailed description will be omitted.

As shown by the arrow in FIG. 1, a cap 9 is attached to the tubular body 3. The cap 9 includes the tubular body 3,
A cylindrical main body portion 10 that covers from the end portion (lower end portion in the figure) opposite to the flange 2 to the flange 2, and a position on the outer surface of the main body portion 10 that is separated from the end portion adjacent to the flange 2 by a predetermined length. And a flange 11 serving as a projecting portion that projects radially outward. In this embodiment, in addition to the flange 11, a second flange 13 having a larger diameter than the flange 2 is formed at the end portion (upper end portion in the drawing) of the blind rivet 1 adjacent to the flange 2. Then, the main body 10 and the first
The flange 11 and the second flange 13 are integrally formed of plastic. It should be noted that it is preferably made of a soft plastic so that it can be easily deformed, which further enhances the sealing effect. Further, as shown in the figure, it is preferable that the main body portion 10 is formed as a tubular member closed at an end portion opposite to the flange 2, that is, a lower end portion so as to completely block the cap 9 from above and below. Furthermore, the first as the overhang part
The lengths of the flange 11 and the second flange 13 can be arbitrarily determined according to the purpose of use. For example, when the main body portion between the first flange 11 and the second flange 13 is used as a support shaft for something, it is determined according to the member to be supported.

A case in which the blind rivet 1 having the cap 9 attached thereto is attached to the panel 14 as an attaching member will be described with reference to FIG. In the blind rivet 1 with the cap 9 attached,
The cylindrical body 3 and the cap body 10 are inserted into the mounting holes of the panel 14 with the mandrel head 5 side as the leading end of the cap 9.
The flange 11 is inserted until it comes into contact. Next, the exposed portion of the mandrel 6 is gripped by a fastening tool (not shown) and pulled so strongly that the mandrel 6 breaks at the small diameter portion 7. As a result, the expanded head 5 of the mandrel 6
A position (15) on the end side of the tubular body from the first flange 11 (overhanging portion) of the cap 9, that is, on the lower end side of the tubular body 3.
Are deformed so as to expand radially outward, and by this deformation, the corresponding portion (17) of the cap body 10 is also deformed so as to expand. The blind rivet 1 with a cap is fixed to the panel 14 by these deformed expanded diameter portions 15 and 17 and the flange 2. In this fixing, not only the expanded diameter portion 15 of the tubular body 3 but also the expanded diameter portion 17 of the cap body 10 is fitted into the mounting hole of the panel 14 to seal the mounting hole. When the cap body 10 is made of soft plastic, the degree of close contact with the mounting hole is high, and even if the mounting hole is slightly deformed, it can be accommodated and the sealing effect is further enhanced. Further, since the main body portion 10 is closed at the lower end portion, the upper surface and the lower surface of the panel are shielded from each other, so that the airtightness and the watertightness can be maintained high and the sound insulation effect can also be maintained high. In addition, the fastening force does not impair the fastening force of the conventional blind rivet, and since the enlarged diameter portion 17 of the cap body 10 is added, the diameter of the enlarged diameter portion becomes larger than that of the conventional blind rivet, and the fastening Power increases.

4 and 5 show a blind rivet 1 having a cap 18 different from the cap of the first embodiment.
Is shown. In this example, the body portion 19 of the cap 18
Has a large diameter portion 21 formed to have a larger diameter than the main body portion of the first embodiment over a predetermined length from the end portion (upper end portion) adjacent to the flange 2. In the illustrated example, the large diameter portion 21 is integrally formed with the main body portion. The lower end side portion of the large diameter portion 21 serves as the projecting portion of the cap main body portion of the present invention. Further, the cap large-diameter portion 21 is formed with a flange 22 having a larger diameter than the large-diameter portion 21 at an end portion (upper end portion) adjacent to the flange 2 of the blind rivet 1. FIG. 5 shows the cap 1
The blind rivet 1 to which 8 is attached is shown attached to the panel 14. This attachment is performed by the procedure described above. Also in this case, the expanded diameter portion 15 of the tubular body 3
Not only that, the enlarged diameter portion 17 of the cap body portion 19 closely fits into the mounting hole of the panel 14 to seal the mounting hole. Therefore, the degree of close contact with the mounting hole is increased, and even if the mounting hole is slightly deformed, the sealing effect is high, the airtightness, the watertightness, the sound insulation effect can be maintained high, and the fastening force is increased.

FIG. 6 shows a state in which the blind rivet 1 having a cap 23 having a shape slightly different from those of FIGS. 4 and 5 is attached to a panel 25 which serves as an attachment member. The cap 23 is different in that, as shown in FIG. 7, the large-diameter portion 26 is formed so as to have a rectangular cross section instead of a circular cross section, and the other parts are different from those of FIGS. 4 and 5. It is the same as the cap 18. A rectangular concave portion 27 is formed in the panel 25 in accordance with the large diameter portion 26 having the rectangular cross section. Therefore, the lower end of the large-diameter portion 26 enters the recess 27 and is prevented from rotating, and the mounting direction is determined. Also in the cap 23, the sealing effect is high, the airtightness, the watertightness, the sound insulation effect can be maintained high, and the fastening force is high.

8 and 9 show an embodiment in which a blind nut 29 is used as the fastener, rather than a blind rivet. The cap 30 is shown in FIGS.
Since it is basically the same as the cap 18 shown in FIG. The blind nut 29 has a flange 31.
The blind rivet 1 does not have a mandrel unlike the blind rivet 1. Inside the tubular body 33, a female screw 34 is provided near the end opposite to the flange 31.
Are formed. In the blind nut, instead of the mandrel of the blind rivet, a rod-shaped member 37 having a male screw 35 is used as shown in FIG. The rod-shaped member 37 is rotated by a fastening tool or by hand as shown by an arrow, and the male screw 35 is rotated to the cylindrical body 33.
It is screwed into the female screw 34 of No. 3, and by continuing the rotation, the tubular body portion formed with the female screw 34 is strongly pulled to the flange side. By this attraction, as shown in FIG. 9,
The tubular body 33 is above the female screw 34, but the cap 30
Position (38) below the lower end (overhang) of the large diameter portion 21 of
At, it is deformed so as to expand radially outward. By this deformation, the corresponding portion (39) of the cap body 19 is also deformed so as to expand its diameter. The blind nut 30 with a cap is fixed to the panel 14 by the deformed enlarged diameter portions 38 and 39 and the large diameter portion 21. Also in this case, not only the expanded diameter portion 38 of the tubular body 19 but also the expanded diameter portion 39 of the cap body 19 seals the mounting hole of the panel 14 and has a high degree of close contact with the mounting hole. Even if it is slightly deformed, it can be dealt with, the sealing effect is high, the airtightness, watertightness and sound insulation effect can be maintained high, and the fastening force is increased. The cap attached to the blind nut is not limited to this example, and may be the cap 9 of FIG.

FIG. 10 shows an example of a different cap. The cap 41 is similar to the cap 18 of FIG. 4, but the main body portion 42 and the large diameter portion 43 are formed separately. The large diameter portion 43 is formed over a predetermined length from the upper end portion of the main body portion 42. A portion of the large diameter portion 43 on the lower end side serves as a projecting portion of the cap main body portion of the present invention. A flange 45 having a larger diameter than the large diameter portion 43 is formed at the upper end of the large diameter portion 43. The main body 42 is made of soft plastic,
The large diameter portion 43 is formed of hard plastic or metal. As a result, it is possible to easily deform the main body 42 in the radial direction, and to increase the rigidity of the large diameter portion 43 to obtain a high fastening force and a high supporting force at the large diameter portion. In addition,
In order to fix the large diameter portion 43 to the main body portion 42, an enlarged diameter portion 46 is provided at the upper end of the main body portion 42, and a concave portion 47 for fitting the enlarged diameter portion 46 into the large diameter portion 43 is formed. This cap 41
Is blind rivet 1 or blind nut 29
It has a high sealing effect, can maintain high airtightness, watertightness, and sound insulation, and can function as a fastener with increased fastening force.

[0016]

According to the present invention, a fastener having a cap body having a plastic main body covering the fastener tubular body from the end portion to the flange and a projecting portion at a predetermined distance from the tubular body flange is provided. Since the fastener tubular body can be deformed so as to expand its diameter at a position closer to the end portion side of the tubular body than the projecting portion of the cap, this expanded diameter portion expands the main body portion of the cap, Not only the expanded diameter part of the cylindrical body, but also the expanded diameter part of the cap body fits perfectly into the mounting hole of the mounting member,
Seal the mounting holes. Therefore, the degree of close contact with the mounting hole is increased, and even if the mounting hole is slightly deformed, it can be coped with, the sealing effect is high, and the fastening force is also increased.

[Brief description of drawings]

FIG. 1 is a view showing a blind rivet as a fastener with a cap according to a first embodiment of the present invention, showing a state before mounting the cap.

FIG. 2 is a view showing a state in which a cap is attached to the blind rivet in FIG.

FIG. 3 is a view showing a state in which the blind rivet of FIG. 1 is attached to a panel.

FIG. 4 is a view showing a blind rivet as a fastener with a cap according to a second embodiment of the present invention.

5 is a view showing a state in which the blind rivet of FIG. 4 is attached to a panel.

FIG. 6 is a cap different from the cap shown in FIG.
It is a figure which shows the state which attached the blind rivet to the panel.

FIG. 7 is a sectional view taken along line AA of FIG. 6;

FIG. 8 is a view showing a blind nut as a fastener with a cap according to the present invention, which is in a state before being attached to a panel.

9 is a diagram showing a state in which the blind nut of FIG. 8 is attached to a panel.

FIG. 10 is a sectional view showing still another modification of the cap.

[Explanation of symbols]

 1 Blind Rivet 2 Flange 3 Cylindrical Body 5 Mandrel Head 6 Mandrel 7 Small Diameter Part for Breaking 9 Cap 10 Main Body 11 First Flange (Overhanging Part) 13 Second Flange 14 Panel 15 Expanding Part of Cylindrical Body 17 Cap Expanded part of main body 18 Cap 19 Main body 21 Large diameter part 23 Cap 26 Large diameter part 29 Blind nut 30 Cap 33 Cylindrical body 34 Female screw 35 Male screw 37 Rod member 41 Cap 42 Main body 43 Large diameter part

Claims (18)

[Claims] 1. A hollow cylindrical body having a flange formed therein, wherein a part of the cylindrical body can be deformed so as to expand radially outward, and the expanded diameter portion by this deformation and the flange. In a fastener fixed to a mounting member such as a panel by a cap, a cap is attached to the tubular body, and the cap covers the tubular body from an end opposite to the flange to a flange. And a tubular main body portion, and an overhanging portion projecting outward in the radial direction on the outer surface of the main body portion at a position separated from the end portion adjacent to the flange by a predetermined length. A fastener characterized by being made of plastic. 2. The fastener according to claim 1, wherein the protruding portion of the cap is formed as a flange having a diameter larger than that of the main body portion. 3. The fastener according to claim 2, wherein a second flange having a diameter larger than that of the fastener flange is formed at an end portion of the main body of the cap adjacent to the fastener flange. A fastener characterized by: 4. The fastener according to claim 1, wherein the protruding portion of the cap is formed by a large-diameter portion formed to have a larger diameter than the main body portion over the predetermined length. Fastener. 5. The fastener according to claim 4, wherein the large diameter portion of the cap is formed with a flange having a larger diameter than the large diameter portion at an end portion adjacent to the flange of the fastener. A fastener characterized by: 6. The fastener according to claim 4 or 5, wherein the large diameter portion is integrally formed with the main body portion. 7. The fastener according to claim 4 or 5, wherein the large-diameter portion is formed separately from the main body portion, and the large-diameter portion is made of hard plastic or metal. Ingredient 8. The fastener according to claim 1, wherein the main body portion is formed of a soft plastic and is closed at an end opposite to the fastener flange. A fastener characterized by comprising: 9. The fastener according to any one of claims 1 to 8, wherein the fastener is a blind rivet. 10. The fastener according to any one of claims 1 to 8, wherein the fastener is a blind nut. 11. A cap for use in a fastener that includes a tubular body having a flange formed therein and is deformed so that a part of the tubular body expands radially outward. A tubular main body that covers the tubular body from the end opposite to the flange to the flange, and a position on the outer surface of the main body that is separated from the end adjacent to the tubular body by a predetermined length. In the radial direction, the main body of the cap is made of plastic. 12. The cap according to claim 11, wherein the protruding portion of the cap is formed as a flange having a diameter larger than that of the main body portion. 13. The cap according to claim 12, wherein the cap body has a second flange having a diameter larger than that of the fastener flange formed at an end portion adjacent to the fastener flange. Cap to do. 14. The cap according to claim 11, wherein the protruding portion of the cap is formed by a large-diameter portion formed to have a larger diameter than the main body portion over the predetermined length. . 15. The cap according to claim 14, wherein the large diameter portion of the cap is formed with a flange having a larger diameter than the large diameter portion at an end portion adjacent to the flange of the fastener. Characteristic cap. 16. The cap according to claim 14 or 15, wherein the large diameter portion is integrally formed with the main body portion. 17. The cap according to claim 14, wherein the large diameter portion is formed separately from the main body portion, and the large diameter portion is made of hard plastic or metal. 18. The cap according to any one of claims 11 to 17, wherein the main body is a tubular member formed of soft plastic and closed at an end opposite to the fastener flange. A cap that is characterized by.