JP2007222885A - Method and device for connecting a plurality of members with rivet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the occurrence of deformation and stress in a part of members, which corresponds to a rivet, and to mutually connect a plurality of members with a rivet without requiring a guide pin. <P>SOLUTION: Through holes 21, 22 are previously formed in members 17, 18. A rivet 23, which is inserted into the through holes, is used to connect the members, and a tip section 27 of a rivet shank 25 is made hollow. The members are placed on a die 30 in a state that their through holes are aligned. A conical projection 31 is formed on the die, and a rivet head part 26 is pressed against the die by a punch 33 having such a strength that the projection of the die radially expands and deforms the tip section of the rivet shank. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method and apparatus for interconnecting a plurality of members such as panels using, for example, a rivet resembling the shape of a self-drilling rivet.

  A method and apparatus for connecting members such as a plurality of panels to each other using a self-piercing rivet are known. An example of a connecting device using a self-piercing rivet is described in Japanese Patent Publication No. 9-5061537 (Patent Document 1). 1 and 2 show a connecting device for a plurality of members using the self-piercing rivet described in Patent Document 1 and a self-piercing rivet fastened to the member. In FIG. 1, a member connecting apparatus 1 using a self-piercing rivet clamps two members 5 and 6 with a strong force (see arrow) by a die 2 and a nose 3, and a punch 7 forms a self-piercing rivet 9. Into the members 5 and 6. The self-piercing rivet 9 has a large-diameter head portion 10 and a hollow cylindrical shaft portion 11 depending from the head portion 10. Self-drilling rivets 9 are driven into the members 5 and 6 by punches 7 on the members 5 and 6 arranged on the die 2. As shown in FIG. 2, when the self-piercing rivet 9 is driven into the members 5 and 6, the shaft portion 11 penetrates the members 5 and 6, and the tip of the shaft portion 11 expands radially outward. Thus, the shaft tip 13 remains in the receiving member 6 adjacent to the die 2 without penetrating it. The members 5 and 6 are connected to each other by the distal end of the shaft portion 11 and the head portion 10 which are deformed and expanded in the member 6. Such a self-piercing rivet penetrates the punch-side member 5 but is driven so as to remain in the receiving-side member 6 adjacent to the die 2 without penetrating it. No rivet hole is formed on the surface of 6. Therefore, there is an advantage that the sealing performance to the member 6 on the receiving side is not impaired and the appearance is maintained as it is.

JP-T-9-506153 (corresponding to International Publication WO95 / 090307) Japanese Utility Model Publication No. 53-146866 JP-A-6-007879 JP 7-503663 A (corresponding to International Publication WO 93/10925) JP-T-10-501744 (corresponding to International Publication WO95 / 35174) Japanese Utility Model Publication No. 61-13146 (Japanese Utility Model Publication No. 57-11648)

  As described above, the self-piercing rivet of the member connecting device of Patent Document 1 penetrates the member and connects the members to each other when driven into the member. Similarly to the self-piercing rivet described in Patent Documents 2 and 3, the rivet itself penetrates the members by driving and connects a plurality of members to each other. Patent Document 4 describes a technique in which a hollow rivet is strongly pushed into two members to cause both members to protrude and deform outward in the axial direction and the radial direction of the rivet, thereby connecting both members. In Patent Document 5, a self-drilling rivet is used to connect two or three members, so a hole is formed in the member excluding the die side member in advance, and the rivet is driven into the die side member. Describes a technique for connecting two or three members together by penetrating them. Patent Document 6 discloses a hollow rivet caulking machine, and a device is devised for the guide pin of the caulking machine. In the member connecting method described in Patent Document 6, holes are formed in advance in the two members, and the two members are positioned and arranged on the anvil so that the guide pins extending from the anvil pass through the holes. The hollow rivet held by the jaw on the side is driven by the stem toward the guide pin protruding from the two members, and the tip of the guide pin accepts the hollow portion of the hollow rivet and the hole of the two members is left as it is The guide pin is pulled into the anvil while being guided to the rivet, the rivet is strongly pressed, and the tip of the rivet is expanded and deformed in the anvil. Sheet members are connected.

  As described in Patent Documents 1 to 5, a method of connecting a plurality of members using a self-drilling type rivet is based on a rivet shaft portion by driving a rivet into a member on a side contacting a receiving member such as a die. Since deformation or distortion appears on the outer surface of the portion corresponding to the tip, it is not desirable. In the hollow rivet caulking machine of Patent Document 6, since holes are formed in the member in advance, there is no deformation or distortion of the member due to rivet driving as in the member connecting method of Patent Documents 1 to 5, For connection, a movable guide pin is required on the anvil side.

  Therefore, an object of the present invention is to use a rivet that does not cause deformation or distortion in a member portion corresponding to the driven rivet even if a rivet is driven into a plurality of members to be connected, and does not require a guide pin. It is providing the connection method and apparatus of a some member.

  In order to achieve the above object, according to the method of connecting a plurality of members using rivets according to the present invention, a through hole for inserting a shaft portion of the rivet is formed in each of the plurality of members, and the head of the rivet is formed. The through hole of the abutting member is sized so that the shaft portion of the rivet penetrates but the head portion does not pass, and a plurality of members are overlapped with the through holes aligned so that the tip of the rivet shaft portion On the receiving member formed with a cone-shaped projection having a size that at least a part of the hollow portion of the side portion is formed, the through hole is aligned with the projection, and the rivet is formed in the through hole of the plurality of members. The shaft portion is inserted from the opposite side of the receiving member, and the hollow tip of the shaft portion is arranged to receive the top of the protrusion of the receiving member, and the portion on the tip side of the shaft portion is radially outward by the receiving member protrusion. The head of the rivet is strong enough to expand and deform It consists for pressing the only member, characterized by connecting a plurality of members to each other by the head and diameter deformed shaft portion.

  According to the above connecting method, since the shaft portion of the rivet passes through the through holes of the plurality of members, even if the rivet is driven, a force that causes deformation or distortion does not act on the members to be connected. Accordingly, no deformation or distortion appears in the portion of the member corresponding to the rivet. Further, the above connecting method does not require a movable guide pin for guiding the rivet when driving the rivet.

  In the above-described member connecting method, the head portion of the rivet is formed so that the top surface is flat, and the surface opposite to the top surface is formed to be continuous to the shaft portion while being curved. The top surface of the head can be pressed until it is flush with the surface of the member. Accordingly, the outer surface of the member on the rivet head side is preferable because the member and the rivet head are continuously flat.

  In order to achieve the above object, an apparatus for connecting a plurality of members using rivets according to the present invention includes a shaft portion inserted into a through-hole formed in each of the plurality of members and a plurality of members. A rivet comprising a head having a size that does not pass through a through-hole of at least one member and having a hollow portion at the tip end side of the shaft portion is used, and the apparatus further includes a plurality of members passing through them. A receiving member that is stacked and placed in a state in which the holes are aligned, and the receiving member is formed with a cone-shaped projection having a size that at least partly enters a hollow portion on a distal end side of the rivet shaft portion; The apparatus has the rivet head in a state where the rivet shaft is inserted into the through holes of the plurality of members from the side opposite to the receiving member and the hollow tip of the shaft receives the top of the protrusion of the receiving member. The tip of the shaft by the protrusion of the receiving member The hollow portion on the side is provided with a pressing means for pressing toward the receiving member with the strength of expanding and deforming radially outward, and the plurality of members are connected to each other by the head portion and the shaft portion that has been expanded and deformed. It is characterized by that.

  According to the above connecting device, since the shaft portion of the rivet passes through the through holes of the plurality of members, even if the rivet is driven, a force that causes deformation or distortion does not act on the members to be connected. Accordingly, no deformation or distortion appears in the portion of the member corresponding to the rivet. Further, the connecting device does not require a movable guide pin for guiding the rivet when driving the rivet.

  In the above-described member connecting apparatus, the head portion of the rivet is formed so that the top surface is flat, the surface opposite to the top surface is curved and is continuous with the shaft portion, and the pressing means is the rivet head. The top surface can be pressed until it is flush with the surface of the member. Accordingly, the outer surface on the rivet head side is preferable because the member and the rivet head are continuously flat.

  Further, the hollow portion on the tip side of the rivet shaft portion can be formed in a conical recess. Further, the shaft portion is formed in a bar shape except for the tip side portion, and the length of the shaft portion is the same as that of the shaft portion protruding slightly from the outer surface of the plurality of members when inserted into the plurality of members. Can be the length of the surface. The outer shape of the rivet shaft portion is formed in a right cylindrical shape. Further, the receiving member can be implemented by a die in which a conical protrusion is formed at the center and an annular concave groove is formed around the protrusion.

  Hereinafter, with reference to FIGS. 3-6, the connection apparatus of the several member using the rivet based on embodiment of this invention is demonstrated. In FIG. 3, a member connecting device 19 that connects a plurality of members 17 and 18 uses a rivet 23 that is inserted into through holes 21 and 22 formed in advance in each of the plurality of members 17 and 18. The rivet 23 includes a shaft portion 25 inserted into the through holes 21 and 22, and a head portion 26 having a size that does not pass through the through hole 21 of at least one member (the upper member 17) of the plurality of members 17 and 18. Consists of. A portion 27 on the tip side of the shaft portion 25 of the rivet 23 is formed hollow by a conical recess 29, for example. The member connecting device 19 includes a die 30 as a receiving member on which a plurality of members 17 and 18 are stacked and placed with their through holes 21 and 22 aligned. The die 30 is formed with a cone-shaped projection 31 (conical shape in the illustrated example) having a size that allows at least a portion to enter the concave portion 29 that is a hollow portion of the tip side portion 27 of the rivet shaft portion 25. Further, the member connecting device 19 is configured such that the shaft portion 25 of the rivet 23 is inserted into the through holes 21 and 22 of the plurality of members 17 and 18 from the side opposite to the die 30 so that the hollow tip side portion 27 of the shaft portion 25 is the die. The strength of the head 26 of the rivet 23 being expanded and deformed radially outward by the protrusion 31 of the die 30 in the state where the top of the protrusion 31 of 30 is received. Thus, a punch 33 is provided as pressing means for pressing toward the die 30.

  FIG. 4 is a sectional view showing the detailed shape of the rivet 23. The rivet 23 is generally made of steel. The rivet 23 can be made of aluminum depending on the material of the member 17 to be connected and the connection strength requirements of the members 17 and 18. Furthermore, the rivet 23 can be made of a resin material that can be plastically deformed. As shown in FIG. 4, the top surface 34 of the head portion 26 of the rivet 23 is formed flat. Thus, when the top surface 34 of the rivet head 26 is pressed with the punch 33 until it is flush with the surface of the upper member 17, the surface of the member 17 and the rivet head 26 are flush with each other, and the appearance after the rivet is fastened. Make it better. Further, the surface opposite to the top surface 34 (the lower surface in FIG. 4) is formed so as to be substantially semicircular (radius R) and continuous to the shaft portion 25. As a result, the head portion 26 smoothly continues to the shaft portion 25, and when the rivet 23 is pressed by the punch 33, the head portion 26 is smoothly pressed against the upper edge portion of the through hole 21 of the member 17. However, it is not necessary to chamfer the upper edge portion of the through hole 21. The shaft portion 25 is preferably formed in a solid (solid) bar shape except for the distal end portion 27 and can maintain a sufficient connection strength. The shaft portion 25 has a length in which the tip end of the shaft portion slightly protrudes from the outer surface of the member 18 on the lower side of the plurality of members (see FIG. 1) or is in the same plane when inserted into the plurality of members 17 and 18. it can. Thus, by shortening the protruding length of the tip of the shaft portion 25, the diameter-enlarged deformed shaft portion projecting from the member 18 is shortened, and the appearance of the outer surface of the member 18 can be maintained substantially flat. Furthermore, in addition to shortening the length of the tip end portion 27, the conical recess 29 can be formed slightly larger so that the tip end portion 27 is also thin. As a result, the fastening portion that deforms and expands the diameter of the distal end portion 27 of the rivet shaft portion 25 can be made to the minimum necessary size, and the portion protruding from the lower member 18 can be formed small. The conical recess 29 is preferably opened at the opening angle A, and the tip and the inside are smoothly continuous. As a result, the distal end portion 27 of the shaft portion 25 is smoothly expanded in diameter. Forming the outer shape of the shaft portion 25 in the shape of a right cylinder is simple in processing, and the operation of inserting the members 17 and 18 into the through holes 21 and 22 becomes easy. The hollow portion of the shaft portion 25 may extend not only to the distal end side portion 27 but also to the head portion 26 side.

  FIG. 5 is a partial sectional view showing the detailed shape of the die 30 as a receiving member. The die 30 has a conical protrusion 31 formed at the center in order to expand and deform the hollow distal end portion 27 of the shaft portion 25 of the rivet 23. The protrusion 31 can be formed with a low height, whereby the diameter-expanding deformation of the distal end side portion 27 can be formed as small as necessary. In the illustrated example, an annular concave groove 35 is formed around the protrusion 31. When the die 30 presses the rivet 23 with the punch 33, the tip portion 27 of the shaft portion 25 of the rivet 23 is expanded in diameter, and the members 17 and 18 are pressed against each other by pressing the punch 33. The protrusion 31 deforms and deforms the distal end portion 27 of the shaft portion 25 of the rivet 23 in an enlarged diameter, and the concave groove 35 shapes the outer surface of the distal end portion 27 that has been deformed and expanded. The concave groove 35 is not necessarily required depending on the material of the member 18 and the material of the rivet 23. The outer peripheral portion of the projection 31 may be formed flat, and the conical projection 31 continues as it is. You may form in a slope shape. As described above, when there is no concave groove 35, the outer surface of the distal end portion 27 of the rivet 23 whose diameter has been deformed can be made flat on the outer surface of the member 18. Furthermore, the shape of the protrusion 31 may be a shape that can expand and deform the distal end portion 27 of the shaft portion 25 when the rivet 23 is pressed. For example, it may be a part that enters the tip of a rivet shaft having a shape that allows the rivet shaft to be expanded in diameter.

  The punch 33 as a pressing means for the rivet 23 has a function of pressing the rivet 23 against the die 30, expanding and deforming the distal end portion 27 of the rivet shaft portion 25, and pressing the members 17 and 18 together. . In the example of FIG. 3, the pressing surface of the punch 33 is formed flat. The pressing surface of the punch 33 may be formed in another shape, for example, so as to position the rivet 23 by forming a recess that accommodates the rivet head 26. Further, the pressing means is not limited to the illustrated punch 33, and any pressing means can be used as long as it has a function of expanding and deforming the distal end portion 27 of the rivet shaft portion 25.

  A method of connecting a plurality of members 17 and 18 (two members in the illustrated example, but may be three or more members) using the member connecting device 19 having the above-described configuration. explain. As shown in FIG. 3, through holes 21 and 22 for inserting the shaft portion 25 of the rivet 23 are formed in each of the plurality of members 17 and 18 in advance. These through holes 21 and 22 are not chamfered. Further, the through hole 21 of the member 17 with which the head portion 26 of the rivet 23 abuts is formed to have a size that allows the shaft portion 25 of the rivet 23 to pass therethrough but not pass the head portion 26. Note that the relationship between the size of the through hole 21 and the size of the rivet head 26 is relative, and not only can the size of the through hole 21 be selected based on the rivet 23 as described above, The rivet 23 can also be selected based on the size.

  As shown in FIG. 3, the members 17 and 18 are placed on the die 30 with the through holes 21 and 22 being aligned with each other. This placement is placed so that the through holes 21 and 22 are aligned with the protrusions 31 of the die 30. Then, the shaft portion 25 of the rivet 23 is inserted into the through holes 21 and 22 of the plurality of members 17 and 18 from the side opposite to the die 30, and the hollow tip side portion 27 of the shaft portion 25 is the protrusion of the die 30. Position to receive 31 tops. In addition, after inserting the shaft portion 25 of the rivet 23 into the through holes 21 and 22 of the plurality of members 17 and 18, the plurality of members 17 and 18 into which the rivet 23 is inserted protrudes from the member 18. Alternatively, the tip portion 27 may be placed on the die 30 so that the tip end portion 27 is aligned with the top of the protrusion 31 of the die 30.

  As shown in FIG. 3, a punch 33 is disposed on the plurality of members 17 and 18 placed on the die 30 and presses the head 26 of the rivet 23. The punch 33 has a strength that the distal end portion 27 of the rivet shaft portion 25 expands radially outward on the outer surface of the member 18 by the protrusion 31 of the die 30, and presses the head 26 of the rivet 23 toward the die 30. To do. By this pressing, the distal end side portion 27 of the rivet shaft portion 25 is deformed while expanding radially outward along the outer shape of the protrusion 31 of the die 30. By continuing the pressing, the diameter expansion deformation of the distal end portion 27 proceeds along the outer surface of the member 18, and the distal end portion 27 expands and deforms so as to tighten the member 18, and the expanded distal end portion of FIG. 37. At this time, the curved surface 38 on the back surface of the head portion 26 acts to increase the diameter of the upper edge portion of the through hole 21 of the member 17, and the head portion 26 sinks into the member 17 while expanding the through hole 21. Include.

  FIG. 6 shows a state in which the members 17 and 18 are removed from the die 30 after the rivet 23 is pressed by the punch 33. As shown in FIG. 6, the rivet 23 is fastened to the plurality of members 17, 18, and the plurality of members 17, 18 are closely connected to each other. The flat top surface 34 of the head 26 is pressed flush with the surface of the member 17, and the entire outer surface becomes flat, providing a good appearance without irregularities. Further, the curved surface 38 on the back surface side of the head portion 26 acts so as to smoothly chamfer the upper edge portion of the through hole 21 of the member 17, and the fastening of the rivet 23 is also stable. Further, the distal end portion 37 whose diameter has been deformed is also deformed so as to smoothly chamfer the lower edge portion of the through hole 22 of the member 18, thereby improving the appearance and stabilizing the fastening of the rivet 23.

  As described above, by fastening the rivet 23 to the plurality of members 17 and 18, the plurality of members 17 and 18 are tightly coupled to each other without exhibiting deformation or distortion to the members. It is possible to maintain the appearance after the connection without chamfering the 18 through-holes 21 and 22, and the fastening portion of the rivet 23 to the members 17 and 18 remains flat or It can be formed almost flat and can have a good appearance.

It is sectional drawing which shows a mode before a several member is clamped between the punch and die | dye of a well-known coupling device using self-drilling type rivets, and a self-drilling type rivet is driven. FIG. 2 is a cross-sectional view after the self-piercing rivet of FIG. 1 has been driven into a member. It is sectional drawing which shows the principal part of the connection apparatus of the several member using a rivet based on one Embodiment of this invention. It is sectional drawing which shows the detail of the rivet of FIG. FIG. 4 is a partial cross-sectional view showing details of the die of FIG. 3. It is sectional drawing which shows the state after fastening a rivet to a member with the connection apparatus of FIG. 3, and removing the member from die | dye.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Well-known self-piercing type rivet fastening device 2 Die 3 Nose 5 Punch side member 6 Receiving side member 7 Punch 9 Self-drilling type rivet 10 Head 11 Shaft portion 13 Shaft portion tip 17 Punch side member 18 Die side member DESCRIPTION OF SYMBOLS 19 Member connection apparatus 21 and 22 Through-hole 23 Rivet 25 Rivet shaft part 26 Rivet head part 27 Front end side part 29 Shaft part 30 Die 31 Protrusion 33 Punch 34 Top face 35 of a rivet head Groove groove 37 Tip which diameter-transformed Side surface 38 Curved surface of head

Claims (9)

A method of connecting a plurality of members using rivets,
A through hole for inserting the shaft portion of the rivet is formed in each of the plurality of members, and the through hole of the member with which the head portion of the rivet abuts penetrates the shaft portion of the rivet but the head portion It is a size that does not pass,
A receiving member in which the plurality of members are overlapped in a state where the through holes are aligned, and a cone-shaped protrusion having a size that at least partly enters a hollow portion of a tip side portion of the rivet shaft portion is formed. On the protrusion, the protrusion is aligned with the through hole,
The rivet is arranged so that the hollow end of the shaft portion receives the top of the protrusion of the receiving member by inserting the shaft portion from the opposite side of the receiving member into the through holes of the plurality of members.
Pressing the head of the rivet toward the receiving member with such a strength that the tip side portion of the shaft portion expands radially outward by the protrusion of the receiving member;
A method of connecting a plurality of members, wherein the plurality of members are connected to each other by the head portion and the shaft portion that has undergone diameter expansion deformation.   2. The method according to claim 1, wherein the head of the rivet is formed so that a top surface thereof is flat and a surface opposite to the top surface is curved so as to continue to the shaft portion, and Pressing comprises pressing the top surface of the rivet head until it is flush with the surface of the member. A device for connecting a plurality of members using rivets,
The shaft portion is inserted into a through hole formed in each of the plurality of members, and a head having a size that does not pass through the through hole of at least one member of the plurality of members. A rivet with a hollow side portion;
A receiving member on which the plurality of members are stacked and placed in a state in which the through-holes are aligned, and a cone having a size that at least partially enters the hollow portion of the tip side portion of the rivet shaft portion. A receiving member formed with a shaped projection;
The rivet shaft is inserted in the through holes of the plurality of members from the side opposite to the receiving member, and the hollow tip of the shaft portion is disposed so as to receive the top of the protrusion of the receiving member. A pressing means for pressing the head portion toward the receiving member with the strength that the hollow portion on the distal end side of the shaft portion expands radially outward by the protrusion of the receiving member,
An apparatus for connecting a plurality of members, wherein the plurality of members are connected to each other by the head portion and the shaft portion that has undergone diameter expansion deformation.   The apparatus according to claim 3, wherein the head of the rivet is formed so that a top surface thereof is flat, and a surface opposite to the top surface is curved so as to continue to the shaft portion, The pressing means presses the top surface of the rivet head until it is flush with the surface of the member.   5. The apparatus according to claim 3, wherein a conical recess is formed in a hollow portion on a distal end side of the rivet shaft portion.   6. The apparatus according to claim 5, wherein the shaft portion is formed in a bar shape except for the tip side portion, and the length of the shaft portion is inserted into the plurality of members. The apparatus is characterized in that it protrudes slightly from the outer surface of the plurality of members or has the same length.   The apparatus according to claim 6, wherein an outer shape of the rivet shaft portion is formed in a right cylindrical shape.   The apparatus according to any one of claims 3 to 7, wherein the receiving member is a die in which the conical protrusion is formed in the center and an annular groove is formed around the protrusion. A device characterized by that.   9. The device according to claim 3, wherein the receiving member is formed with the conical protrusion in the center, and a surface radially outward from the protrusion is a flat surface or a conical shape of the protrusion. Is a die formed as an extending conical surface.

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