JP6131363B1 - Rivet fastener and rivet fastening method - Google Patents

Abstract

Provided is a rivet fastener capable of increasing the fastening force and improving the workability of fastening work. A rivet fastener includes a rivet (1) and a collar, and is inserted into through holes of a plurality of plate members to fasten the plate members. The rivet (1) includes a head (3) and the plate members. The shaft portion 4 is inserted into the through hole, and the shaft portion 4 is provided on the neck portion 21 side, the straight portion 5 is provided on the tip portion 24 side of the straight portion 5, and the circumferential grooves 7, 7, ... are provided in the concavo-convex portion 8 formed in the axial direction and between the straight portion 5 and the concavo-convex portion 8 or in the peak portion 8a on the neck 21 side of the concavo-convex portion 8, and the diameter increases toward the tip portion 24 side. It has a taper portion 6 that becomes smaller, and has longitudinal grooves 9, 9 provided along the axial direction so as to intersect the circumferential grooves 7, 7,... Of the concavo-convex portion 8. The rivet 1 is attached around the concavo-convex portion 8, and the inner diameter of the collar 2 is set to the tapered portion 6. Fit can be temporarily stopped the color 2 to rivet 1 by. [Selection] Figure 1

Description

The present invention includes a rivet fastener used for fastening a plurality of plate-like members, relates Brighter betting fastening method to use this rivet fastener.

Patent Document 1 includes a pin 11 and a collar 12. A plurality of circumferential deformation grooves 16 are formed in the pin 11 in the longitudinal direction of the pin 11. The pin 11 is a hole in which two plates are stacked. The collar 12 is fitted into the pin 11 from the opposite side, the collar 12 is caulked from the periphery and plastically deformed along the deformation groove 16, and the pin 11 and the collar 12 are integrated to fasten the two plates. Things are listed.
In the device described in Patent Document 1, since the deformation groove 16 is a circumferential groove, the pin 11 and the collar 12 may rotate relative to each other around the central axis, resulting in looseness. In addition, after the collar 12 is inserted into the pin 11 and before the collar 12 is caulked to the pin 11, the collar 12 or the pin 11 may drop by its own weight, and workability is poor.

JP-A-8-296620

An object of the present invention is to provide a rivet fastener that can increase the fastening force and improve the workability of the fastening work, and a rivet fastening method that uses this rivet fastener in view of the above-described circumstances.

In order to achieve the above object, a rivet fastener according to a first aspect of the present invention is a rivet fastener that includes a rivet and a collar, and is inserted into through holes of a plurality of plate members to fasten the plate members. The rivet has a head portion and a shaft portion that is inserted into the through hole of the plate-like member, and the shaft portion is provided on the neck side and on the tip portion side of the straight portion. An uneven portion having a plurality of axial grooves formed in the axial direction, and a taper portion that is provided between the straight portion and the uneven portion, or a peak portion on the neck side of the uneven portion, and the diameter decreases toward the tip end side. And having a longitudinal groove provided along the axial direction so as to intersect the circumferential groove of the concavo-convex portion, and the collar is attached by caulking around the concavo-convex portion of the rivet, inner diameter of the tapered portion of the rivet in a state before caulking Ka By greater than the minimum diameter of the smaller and tapered portion than the large diameter, is pushed toward the neck side is fitted to the collar on the shaft of the rivet, the inner periphery of said collar engaging the tapered portion of the rivet The collar can be temporarily fixed to the rivet.

  The rivet fastener according to the invention described in claim 2 is a saw blade having a tapered surface in which the diameter of the concave-convex portion of the rivet becomes smaller toward the neck side in addition to the configuration of the invention of claim 1. It is characterized by being.

  The rivet fastener according to the invention described in claim 3 is the rivet fastener according to the invention described in claim 1 or 2, wherein the taper portion of the rivet includes a peak portion between the straight portion and the concavo-convex portion and a neck portion of the concavo-convex portion. It is formed in both.

  The rivet fastener according to the invention described in claim 4 is characterized in that, in addition to the configuration of the invention described in claim 1, 2 or 3, the head of the rivet is formed in a dish shape.

A rivet fastening method according to a fifth aspect of the present invention is the method of fastening the plurality of plate-like members using the rivet fastener according to any one of the first to fourth aspects, wherein the shaft portion of the rivet is connected to the plurality of the rivet shafts. A step of inserting the through-hole of the plate-like member, a step of inserting the collar into the protruding shaft portion from the front end side, fitting the inner diameter of the collar into the tapered portion, and temporarily fixing the collar to the rivet; And a step of plastically deforming so as to enter a gap between the plurality of plate-like members to be fastened to the shaft portion of the rivet along the uneven portion of the shaft portion.

In the rivet fastener according to the first aspect of the present invention, when the collar is fitted to the concavo-convex portion of the shaft portion of the rivet and crimped from the periphery, the collar enters the circumferential groove of the concavo-convex portion, so that the axial direction of the rivet and the collar The movement of the collar is prevented, and the collar enters the longitudinal groove provided along the axial direction around the concavo-convex portion, thereby restricting the rotation of the rivet and the collar around the central axis, thereby increasing the fastening force. In addition, the collar has a taper part that decreases in diameter toward the tip part between the straight part of the rivet and the uneven part, or at the peak part on the neck side of the uneven part, and the collar has a maximum diameter of the tapered part of the rivet. Because it is smaller and larger than the minimum diameter of the tapered portion, if the collar is fitted to the shaft portion of the rivet and pushed toward the neck side , the collar can be temporarily fixed by locking the inner periphery of the collar to the tapered portion. The workability of the fastening work can be improved.

  In the rivet fastener according to the invention of claim 2, when the groove shape of the uneven portion of the rivet is a saw blade shape having a tapered surface whose diameter decreases toward the neck side, the collar is caulked and plastically deformed. Since a force for pressing the collar toward the neck side of the rivet acts on the rivet, the fastening force is further improved.

  The rivet fastener according to the invention described in claim 3 has a taper portion formed between both the straight portion and the concavo-convex portion of the rivet and the peak portion on the neck side of the concavo-convex portion. Even if the collar is thicker than usual, or a gap is formed between the plate members to be fastened, and the collar cannot be locked to the tapered portion between the straight portion and the uneven portion, the peak portion on the neck side of the uneven portion The collar can be temporarily fixed by engaging the collar with the tapered portion.

  In the rivet fastener according to the invention described in claim 4, since the head of the rivet is formed in a dish shape, the head is in close contact with the counterbore of the plate-like member to be fastened and is held immovably. Therefore, a stronger fastening structure is obtained.

In the rivet fastening method according to the fifth aspect of the present invention, the collar or rivet is not dropped off by temporarily fastening the collar to the shaft portion of the rivet before the collar is crimped, and the workability of the fastening work is good. In addition, the collar is plastically deformed so as to be along the concave and convex portions of the rivet shaft portion and into the through hole of the plate-like member to be fastened with the rivet shaft portion, thereby preventing looseness and rattling. Strong fastening can be performed.

(A) is a front view of the rivet of the rivet fastener according to the first embodiment of the present invention, (b) is a side view of the rivet, and (c) is a bottom view of the rivet. It is a longitudinal cross-sectional view which shows the use condition of the rivet fastener which concerns on 1st Embodiment, Comprising: The state before crimping a color | collar is shown. It is a longitudinal cross-sectional view which shows the use condition of the rivet fastener which concerns on 1st Embodiment, Comprising: The state after crimping a color | collar is shown. It is an A direction arrow directional view of FIG. It is a perspective view of the caulking tool used when caulking the collar of the rivet fastener of the present invention. It is a front view which shows the use condition of the same crimping tool, Comprising: The state before crimping a color | collar is shown. It is a front view which shows the use condition of the same crimping tool, Comprising: The state after crimping a color | collar is shown. (A) is a front view of the rivet of the rivet fastener according to the second embodiment of the present invention, (b) is a side view of the rivet, and (c) is a bottom view of the rivet. It is a longitudinal cross-sectional view which shows the use condition of the rivet fastener which concerns on 2nd Embodiment, Comprising: The state before crimping a color | collar is shown. It is a longitudinal cross-sectional view which shows the use condition of the rivet fastener which concerns on 2nd Embodiment, Comprising: The state after crimping a color | collar is shown. It is a longitudinal cross-sectional view which shows the use condition of the rivet fastener which concerns on 3rd Embodiment, Comprising: The state before crimping a color | collar is shown. It is a longitudinal cross-sectional view which shows the use condition of the rivet fastener which concerns on 3rd Embodiment, Comprising: The state after crimping a color | collar is shown.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1-4 show a first embodiment of the rivet fastener of the present invention. As shown in FIGS. 2 and 3, the present rivet fastener is used for fastening a plurality of plate-like members 12 a and 12 b, and includes a rivet 1 and a collar 2.

  The rivet 1 has a head 3 and a shaft 4 as shown in FIG. The head 3 is formed in a dish shape. The shaft portion 4 is provided at the tip of the straight portion 5 formed on the neck 21 side, the tip of the straight portion 5, and the diameter of the taper portion 6 decreases toward the tip portion 24 side, and the tip of the taper portion 6. The circumferential grooves 7, 7,... Have a concavo-convex portion 8 formed in the axial direction. The circumferential groove 7 of the concavo-convex portion 8 has a semicircular cross-sectional shape and is continuously formed in an annular shape around the shaft portion 4. Further, the concavo-convex portion 8 is formed with vertical grooves 9 and 9 provided along the axial direction so as to intersect the circumferential grooves 7, 7. The longitudinal grooves 9, 9 have a substantially triangular cross section, have substantially the same groove depth as the circumferential grooves 7, 7,..., And extend across the plurality of circumferential grooves 7, 7,. is there. Two vertical grooves 9, 9 are formed at positions facing the shaft portion.

The collar 2 is fitted to the concavo-convex portion 8 of the shaft portion 4 of the rivet 1 and caulked from the outer peripheral surface, and is formed in a cylindrical shape as shown in FIG. The inner diameter d of the collar 2 is smaller than the maximum diameter D of the tapered portion 6 of the rivet 1 and larger than the minimum diameter of the tapered portion 6.
The rivet 1 is made of a high-strength metal such as iron or stainless steel, and the collar 2 is made of a softer metal such as aluminum.

  5 to 7 show a caulking tool 13 used when caulking the collar 2. As shown in FIGS. 5 and 6, the caulking tool 13 includes a collar biting portion 15 that is widened by forming a plurality of slits 14 in the circumferential direction at the distal end portion of a metal cylinder 25. Reference numeral 25 denotes a cylindrical sleeve 16, and the end of the cylindrical body 25 is fixed to the case 17 a of the hydraulic cylinder 17 with a bolt 26. The sleeve 16 is provided with a connecting portion 27 protruding laterally, and a rod 17 b of the hydraulic cylinder 17 is connected to the connecting portion 27. As shown in FIG. 6, the caulking tool 13 inserts the collar 2 into the collar biting portion 15 and then projects the rod 17b of the hydraulic cylinder 17 as shown in FIG. Since the collar biting portion 15 is slid toward the biting portion 15 and the collar biting portion 15 is contracted accordingly, the outer peripheral surface of the collar 2 is pushed by the conical inclined surface 15 a inside the color biting portion 15. While being pressed against the plate-like member 12b to be fastened, it is caulked from the periphery and is plastically deformed.

Next, a procedure for fastening the two plate-like members 12a and 12b with the present rivet fastener will be described. The plate-like members 12a and 12b to be fastened are provided with a through hole 18 through which the shaft portion 4 of the rivet 1 is inserted in advance, and a counterbore 19 for receiving the head 3 of the rivet 1 is provided on one plate-like member 12a. deep.
First, the shaft portion 4 of the rivet 1 is inserted into the through-hole 18 of the plate-like members 12a and 12b, and the head 3 is accommodated in the counterbore 19 of the plate-like member 12a. At this time, as shown in FIG. 2, the tip 24 side of the tapered portion 6 of the shaft portion 4 of the rivet 1 protrudes from the through hole 18 of the second plate-like member 12b.
Next, the collar 2 is fitted to the shaft portion 4 of the rivet 1 protruding from the through hole 18. At this time, since the inner diameter d of the collar 2 is smaller than the maximum diameter D of the tapered portion 6 of the rivet 1 and larger than the minimum diameter of the tapered portion 6, when the collar 2 is pushed toward the neck 21 side of the rivet 1, The inner periphery of the collar 2 is locked to the tapered portion 6 so that the collar 2 can be temporarily fixed. As a result, the collar 2 or the rivet 1 does not fall out even if the hand is released. In this temporarily fixed state, a slight gap 22 is formed between the collar 2 and the member 12b.
Thereafter, as described above, the collar 2 is inserted into the collar biting portion 15 of the caulking tool 13 and the sleeve 16 is slid toward the collar biting portion 15 by the hydraulic cylinder 17 so that the collar 2 is moved to the plate. It crimps from an outer periphery, pressing against the member 12b.
Then, as shown in FIG. 3, the inner peripheral portion of the collar 2 is plastically deformed, and the inner peripheral portion of the collar 2 is inserted into the plurality of circumferential grooves 7, 7,... As shown in FIG. 4, the inner peripheral portion of the collar 2 enters the longitudinal grooves 9, 9 provided around the uneven portion 8 along the axial direction by plastic deformation, and the shaft portion 4 of the rivet 1 and the collar 2 is integrated. Further, the gap 22 between the collar 2 and the plate-like member 12b is eliminated, the collar 2 is pressure-bonded to the plate-like member 12b, and the upper end portion of the collar 2 penetrates the shaft portion 4 of the rivet 1 and the plate-like member 12b. It enters the gap with the hole 18 (the part denoted by reference numeral 23 in FIG. 3). The head 3 of the rivet 1 is fitted in the counterbore 19 of the member 12a and is held immovable. As a result, the plate-like members 12a and 12b are coupled to the rivet 1 and the collar 2 and fastened firmly.

As described above, when the collar 2 is fitted to the uneven portion 8 of the shaft portion 4 of the rivet 1 and caulked from the outer periphery, the collar 2 is inserted into the circumferential grooves 7, 7,. As a result, the movement of the rivet 1 and the collar 2 in the axial direction is prevented, and the collar 2 enters the longitudinal grooves 9 and 9 provided around the uneven portion 8 along the axial direction. Since the rotation around the central axis of the collar 2 is restricted, the fastening force can be increased. Furthermore, the collar 2 is pressure-bonded to the plate-like member 12b, and the collar 2 enters the gap between the shaft portion 4 of the rivet 1 and the through-hole 18 of the plate-like member 12b, thereby preventing rattling of the member 12b. In addition, since the dish-shaped head 3 of the rivet 1 is fitted into the counterbore 19 of the member 12a, rattling of the member 12a is prevented, so that the fastening force can be further increased.
Further, since the inner diameter d of the collar 2 is smaller than the maximum diameter D of the tapered portion 6 of the rivet 1 and larger than the minimum diameter of the tapered portion 6, when the collar 2 is fitted to the shaft portion 4 of the rivet 1, Since the collar 2 can be temporarily fixed by engaging the inner periphery of the taper portion 6 with the taper portion 6, the workability of the fastening operation can be improved. Normally, there are a plurality of fastening points for the plate-like members 12a and 12b. As a procedure of fastening work, first, the rivets 1 are inserted into all fastening parts, and then the collars 2 are sequentially fitted into the rivets 1. Finally, each color 2 is caulked sequentially. If the collar 2 or the rivet 1 has fallen off when trying to caulk the collar 2, the work must be interrupted and the efficiency is inferior, but this fastener is temporarily attached to the rivet 1 as described above. Since it can be stopped, work can be performed continuously and efficiently.
Since the head 3 of the rivet 1 is formed in a dish shape and the head 3 does not protrude from the plate-like members 12a and 12b to be fastened, the fastening portion is not conspicuous and the appearance is good.

  8-10 has shown 2nd Embodiment of the fastener of this invention. As shown in FIG. 8, the fastener of this embodiment has a tapered surface 10 in which the shape of the groove 7 in the circumferential direction of the concavo-convex portion 8 of the shaft portion 4 of the rivet 1 decreases in diameter toward the neck 21 side. It has a saw blade shape. Furthermore, the rivet 1 of the present embodiment has a tip portion on the first and second peak portions 8a from the neck 21 side of the concavo-convex portion 8 in addition to the tapered portion 6 formed continuously from the straight portion 5 on the shaft portion 4. A tapered portion 11 having a diameter that decreases toward the 24 side is formed.

FIG. 9 shows a state in which the collar 2 is temporarily fixed by being fitted to the shaft portion 4 of the rivet 1. The fastener of this embodiment can temporarily fix the collar 2 by locking the inner periphery of the collar 2 to a tapered portion 6 formed continuously from the straight portion 5 of the shaft portion 4 as shown in FIG. When the plate-like members 12a and 12b to be fastened are thick or a gap is formed between the plate-like members 12a and 12b to be fastened and the tapered portion 6 does not protrude from the second plate-like member 12b, The collar 2 can be temporarily fixed by locking the inner periphery of the collar 2 to the tapered portion 11 formed on the peak portion 8 a of the uneven portion 8.
FIG. 10 shows a state after the collar 2 is crimped. When the collar 2 is caulked, the shape of the groove 7 in the circumferential direction of the concavo-convex portion 8 of the rivet 1 is a saw blade shape having a tapered surface 10 whose diameter decreases toward the neck 21 side. As indicated by the arrow 20, the collar 2 is plastically deformed inward and a pressing force acts toward the neck 21 side of the rivet 1, so that the fastening force of the plate-like members 12a and 12b is further improved.

11 and 12 show a third embodiment of the fastener of the present invention. In the fastener of the present embodiment, as shown in FIG. 11, the shaft portion 4 of the rivet 1 is provided with an uneven portion 8 immediately before the straight portion 5, and 1, 2, 2 from the neck 21 side of the uneven portion 8. The third peak portion 8a is formed with a tapered portion 11 having a diameter that decreases toward the distal end portion 24, and the collar 2 is locked to the tapered portion 11 and can be temporarily fixed. The concavo-convex portion 8 penetrates into the through hole 18 of the plate-like member 12b to be fastened.
When the collar 2 is caulked, as shown in FIG. 11, the concave-convex portion 8 of the rivet 1 penetrates into the through hole 18 of the plate-like member 12b, so that the shaft portion 4 of the rivet 1 of the collar 2 and the plate-like shape Since the portion 23 entering the gap with the through hole 18 of the member 12b can be increased, the fastening force is improved.

  The present invention is not limited to the embodiments described above. The shape of the rivet head, the shape and number of grooves in the circumferential direction of the concavo-convex portion, the shape and number of longitudinal grooves, the length, and the like can be appropriately changed. The material of the rivet and the collar can be changed as appropriate. The use of the present rivet fastener is not particularly limited, and can be widely used as a fastener for fastening a plurality of plate-like members.

DESCRIPTION OF SYMBOLS 1 Rivet 2 Color | collar 3 Head part 4 Shaft part 5 Straight part 6 Tapered part 7 Circumferential groove 8 Uneven part 9 Vertical groove 10 Tapered surface 11 Tapered part 12a, 12b Plate-shaped member 13 Caulking tool 15 Color biting part 16 Sleeve

Claims (5)

A rivet fastener including a rivet and a collar, which is inserted into through holes of a plurality of plate members and fastens the plate members, wherein the rivet is a shaft portion which is inserted into the head and the through holes of the plate members. The shaft portion is formed on the neck side, the straight portion is provided on the tip side of the straight portion, and a plurality of circumferential grooves are formed in the axial direction, and the straight portion and the uneven portion A taper portion which is provided between the portions or on the peak portion on the neck side of the concavo-convex portion and decreases in diameter toward the tip end side, and extends along the axial direction so as to intersect the circumferential groove of the concavo-convex portion The collar is caulked around the concavo-convex portion of the rivet, and the inner diameter is smaller than the maximum diameter of the taper portion of the rivet before caulking and By being larger than the minimum diameter of the tapered portion, Pushed toward the neck side is fitted Rah the shaft portion of the rivet, rivet fastener, wherein the inner periphery of the collar can be temporarily fixed colors to rivet engages with the tapered portion of the rivet.   2. The rivet fastener according to claim 1, wherein the groove shape of the concavo-convex portion of the rivet is a saw blade shape having a tapered surface whose diameter decreases toward the neck side.   3. The rivet fastener according to claim 1, wherein the taper portion of the rivet is formed both between the straight portion and the concavo-convex portion and at a peak portion on a neck side of the concavo-convex portion.   4. A rivet fastener according to claim 1, wherein the rivet head is formed in a dish shape.   In the method of fastening the plurality of plate-like members using the rivet fastener according to any one of claims 1 to 4, the step of inserting the shaft portion of the rivet into the through holes of the plurality of plate-like members; Inserting the collar into the protruding shaft from the tip side, fitting the inner diameter of the collar to the taper and temporarily fixing the collar to the rivet, and aligning the collar along the concave and convex portions of the shaft of the rivet, A rivet fastening method comprising a step of plastically deforming so as to enter a gap between the shaft portion and the through holes of the plurality of plate-like members to be fastened.

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