JP3059817U - rivet - Google Patents

Abstract

(57) [Problem] To provide a rivet having a structure in which an object can be firmly fastened and can be easily separated, and a fastening method using the rivet. A rivet (10) includes a first stopper (12) formed of a thermoplastic synthetic resin and a second stopper (12) formed of a metal.
And a stopper 20. The first stopper 12 has a protrusion 1
2a and a groove 14 for a driver are formed. A male screw portion 24 and a groove 26 are formed in the second stopper 20. The convex portion 12a of the first stopper 12 and the male screw portion 24 of the second stopper 20 are pressed with the object to be fixed interposed therebetween, and ultrasonic waves are applied to the peripheral portion of the hole 13 of the first stopper 12. Softens as the temperature rises. Thereby, the male screw part 24 of the second stopper 20 enters the inside of the first stopper 12. Then, the first stopper 12 and the male screw portion 24 are integrated in a screwed state.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The invention relates to rivets, and more particularly to rivets used, for example, to secure bindings attached to the cover of a file.

[0002]

[Prior art]

 In a file or the like, a metal binding tool is attached to a cover formed of paper or the like, and a document is bound by the binding tool. Rivets are used to attach the bindings to the cover. The rivet 1 includes a wide head 2 and a shaft 3 extending from the head 2 as shown in FIG. As shown in FIG. 8, a hollow portion 4 is formed in the shaft portion 3 from the front end to the middle portion. A coating film 5 is formed on the head 2 by applying a paint.

When a file is formed using the rivet 1, through holes are formed in the cover and the binding device, and the shaft 3 of the rivet 1 is inserted into these holes and swaged to form a tip of the shaft 3. Is crushed. Thereby, the front end of the shaft portion 3 spreads, the cover and the binding device are tightened, and the binding device is fixed to the cover. At this time, by arranging the head 2 on which the coating film 5 is formed outside the cover, the appearance of the file can be beautiful.

[0004]

[Problems to be solved by the invention]

 In recent years, waste has been separated and disposed of due to environmental issues, and burning and non-burning waste are separated. Even for files that are no longer needed, it is required to separate burning parts such as the cover from non-burning parts such as bindings. However, with a file using rivets as in the past, the cover and the binding device could not be easily separated, and in many cases, the cover and the binding device were discarded with the cover and the binding device integrated.

[0005] Therefore, a main object of the present invention is to provide a rivet having a structure that can firmly tighten an object to be fixed and that can be easily separated.

[0006]

[Means for Solving the Problems]

 The invention provides a first stopper formed of a thermoplastic synthetic resin, a second stopper formed of metal including a wide portion and a male screw portion formed to project from the wide portion. A rivet consisting of a combination of In such a rivet, a groove for a driver can be formed in at least one of the wide portions of the first stopper and the second stopper.

[0007] With this rivet, the object is sandwiched between the first stopper and the second stopper from both sides of the object, and ultrasonic waves are applied while pressing the male screw portion of the second stopper against the first stopper. The contact causes an internal distortion of the first stopper and a collision phenomenon at a joint surface between the first stopper and the male screw portion vibrated by the ultrasonic wave, thereby generating heat and increasing the temperature. Due to this temperature rise, the first stopper formed of the thermoplastic synthetic resin is softened. Thereby, the male screw portion of the second stopper enters the inside of the first stopper, and the first stopper is screwed around the male screw portion to be integrated. Therefore, the adhered object is clamped between the first stopper and the second stopper. In this rivet, since the first stopper and the second stopper are integrated in a screwed state, by rotating the first stopper and the second stopper, the first stopper is rotated. The stop and the second stop can be easily separated. At this time, by forming a groove for the driver in the wide portion of the first stopper and the second stopper, it is possible to rotate the first stopper and the second stopper with the driver. it can. By forming the head with a synthetic resin, the appearance can be enhanced. If a file is formed using these rivets, the cover and the binding device can be easily separated by the driver, and the unnecessary files can be easily discarded.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention with reference to the drawings.

[0009]

[Embodiment of the invention]

 1 and 2 are perspective views showing an example of the rivet of the present invention. The rivet 10 includes a first stop 12. The first stopper 12 is formed of, for example, a thermoplastic synthetic resin such as polyacetal. In addition, thermoplastic synthetic resins such as polycarbonate, polyethylene terephthalate, and polypropylene can be used. The first stopper 12 is formed so that an upper surface thereof has an arc-shaped cross section, and a convex portion 12a is formed on a lower surface. A hole 13 is formed in the convex portion 12a so as to reach an intermediate portion of the first stopper 12. Further, a linear groove 14 is formed on the upper surface of the first stopper 12 so that a flathead screwdriver can be applied thereto.

The rivet 10 includes a second stopper 20. The second stopper 20 is formed of a metal such as aluminum, for example. The second stopper 20 includes a wide portion 22, and a male screw portion 24 is formed on one side of the wide portion 22. The external thread portion 24 is formed to have a diameter larger than the diameter of the hole 13 formed in the convex portion 12a of the first stopper 12. Further, a linear groove 26 is formed on the other side of the wide portion 24 so that a minus driver can be applied thereto.

In order to use the rivet 10, as shown in FIG. 3, a through hole is formed in the object 28, and the first stopper 12 and the second stopper 12 are passed through the through hole from both sides of the object 28. The stopper 20 is connected. At this time, the convex portion 12a of the first stopper 12 and the male screw portion 24 of the second stopper 20 are pressed. The male screw portion 24 of the second stopper 20 is pressed against the convex portion 12 a so as to close the opening of the hole 13 formed in the first stopper 12. Then, by applying ultrasonic waves while pressing them, the internal distortion of the first stopper 12 formed of synthetic resin and the ultrasonic wave on the joint surface between the first stopper 12 and the male screw portion 24 are generated. The vibration causes a collision phenomenon, which generates heat and raises the temperature. Due to this rise in temperature, the peripheral portion of the hole 13 of the first stopper 12 is softened, and the male screw portion 24 enters the inside of the first stopper 12, and the first stopper 12 and the second stopper The 20 male screw portions 24 are screwed and fixed. Therefore, the object 28 is fastened by the first stopper 12 and the wide portion 22 of the second stopper 20.

The rivet 10 is used for, for example, a file as shown in FIG. The file 30 includes a cover 32 formed of, for example, paper. The cover 32 is folded at two places, and a binding device 34 is attached inside the cover. In this case, through holes are formed in the cover 32 and the binding device 34, the convex portions 12 a of the first stoppers 12 are inserted into the through holes from the outside of the cover 32, and the second stoppers from the binding device 34 side. Twenty male threads 24 are inserted. Then, the convex portion 12a of the first stopper 12 and the male screw portion 24 of the second stopper 20 are pressed, and ultrasonic waves are applied. As a result, the male screw portion 24 fits into the first stopper 12, and the first stopper 12 and the male screw portion 24 of the second stopper 20 are fixedly screwed together. Then, the cover 32 and the binding device 34 are fastened and fixed by the first stopper 12 and the wide portion 22 of the second stopper 20.

In the file 30, the document is bound in the cover 32 by the binding device 34. Here, by forming the first stopper 12 of the rivet 10 with a synthetic resin, the appearance of the cover 32 can be made beautiful. When the file 30 is no longer needed and is discarded, a flathead screwdriver is applied to the groove 14 of the first stopper 12 and the groove 26 formed in the wide portion 22 of the second stopper 20, and the first stopper By rotating the stopper 12 and the second stopper 20, the first stopper 12 and the second stopper 20 can be easily separated from each other. Therefore, the cover 32 and the binding device 34 can be easily separated, and can be divided into burnable waste and non-burnable waste.

As shown in FIG. 5, a plurality of linear projections 50 may be formed radially on the side of the first stopper 12 where the projections 12 a are formed. These projections 50 are formed so as to have a sharp cross section as shown in FIG. If the file 30 is formed by using the rivet 10 having such a projection 50 formed thereon, when the first stopper 12 and the second stopper 20 are pressed, the projection 50 bites into the cover 32 and the rivet 10 is formed. When the head 10 is removed, the head 12 can be prevented from rotating. Therefore, the first stopper 12 and the second stopper 20 can be separated only by rotating the groove 26 formed in the wide portion 22 of the second stopper 20 with a screwdriver. The number of such protrusions 50 can be arbitrarily changed. For example, four protrusions 50 may be formed in a positional relationship of 90 ° with respect to the protrusion 12a. Further, the shape of the protrusion 50 is not limited to a linear shape, and may be a dot-like protrusion, and the shape can be arbitrarily changed.

The shape of the groove 14 formed in the first stopper 12 and the shape of the groove 26 formed in the wide portion 22 of the second stopper 20 are cross-shaped so that a Phillips screwdriver is used. You may. In addition, by forming the wide portion 22 of the first stopper 12 and the second stopper 20 into a polygonal shape such as a quadrangle, the wide portion 22 can be rotated by being pinched with pliers or the like. In this case, it is not always necessary to form a groove in the first stopper 12 and the second stopper 20. One of the first stopper 12 and the wide portion 22 of the second stopper 20 may have a polygonal shape, and the other may have a driver groove. In this case, one can be fixed with pliers or the like, and the other can be rotated with a driver.

The rivet 10 of the present invention can be used not only for a file but also for other machines and other uses. That is, by using the rivet 10 of the present invention, when fastening the object to be fixed, the first stopper 12 and the second stopper 20 are connected by using ultrasonic waves, and thus the same as the conventional rivet. Therefore, a strong tightening force can be obtained. Then, in order to separate them, the first stoppers 12 and the second stoppers 20 can be easily separated by rotating them.

As described above, with the rivet 10 of the present invention, a strong tightening force can be obtained, and the rivet 10 can be easily disassembled using a driver or the like. Therefore, when the rivet 10 is used for a file or the like, an unnecessary file can be easily disassembled and separated into burnable refuse and non-burnable refuse.

[0018]

[Effect of the invention]

 According to the present invention, it is possible to obtain a rivet which can obtain a strong tightening force and can be easily disassembled. Further, by forming a groove in the first stopper and the second stopper, the shaft can be easily rotated by a driver. Furthermore, with the file using the rivets of the present invention, the cover and the binding device can be easily separated when they are no longer needed, and it is easy to separate burnable and non-burnable waste.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a rivet of the present invention.

FIG. 2 is an exploded perspective view of the rivet shown in FIG. 1 from another angle.

FIG. 3 is a cross-sectional view showing a state where an object to be fixed is tightened using the rivets shown in FIGS. 1 and 2;

4 is a perspective view showing an example of a file using the rivets shown in FIG.

FIG. 5 is a plan view showing an example in which a projection is formed on the head of the rivet of the present invention.

FIG. 6 is a sectional view showing a projection of the rivet shown in FIG. 5;

FIG. 7 is a perspective view showing an example of a conventional rivet.

8 is a cross-sectional view of the conventional rivet shown in FIG.

[Explanation of symbols]

 Reference Signs List 10 rivet 12 first stopper 12a convex part 14 groove 20 second stopper 22 wide part 24 male screw part 26 groove 30 file 32 cover 34 binding tool 50 protrusion

Claims (2)

[Utility model registration claims] 1. A first stopper formed of a thermoplastic synthetic resin, and a second stopper formed of metal including a wide portion and a male screw portion formed to protrude from the wide portion. A rivet consisting of a combination of 2. The rivet according to claim 1, wherein a groove for a driver is formed in at least one of the wide portions of the first stopper and the second stopper.