JP2018079481A - Caulking structure and caulking method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a caulking structure and caulking method capable of improving holding power of a pin to a caulking object member.SOLUTION: A pin 600 comprises an insertion part 620 inserted into a through-hole 510, a flange part 610 formed in a larger diameter than the through-hole 510 in one end part of the insertion part 620 and abutting on one side surface of a caulking object member 500 and a head part 640 formed in the larger diameter than the through-hole 510 by plastically deforming the other end part of the insertion part 620 and abutting on the other side surface of the caulking object member 500, and the through-hole 510 comprises a first taper part 510a formed so as to diametrically expand toward the other side from one side, and the insertion part 620 comprises a second taper part 620a formed along the first taper part 510a.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a caulking structure formed by fixing a pin to a caulking member and a technique of a caulking method for fixing the pin to the caulking member.

  Conventionally, the technique of the caulking method which fixes a pin to a caulking member is publicly known. For example, as described in Patent Document 1.

  Patent Document 1 describes a caulking tool that fastens a plurality of plate members with a caulking member having a head and a shaft portion connected to the head. In the technique described in Patent Document 1, a plurality of members are fastened by pressing and crushing the tips of the shaft portions with a caulking tool in a state where the shaft portions of the caulking members are inserted into fastening holes of a plurality of plate members. Yes. The caulking member has a through hole (functional hole) penetrating in the axial direction. The caulking tool has a protruding shaft extending from the pressing surface, and presses the tip of the caulking member with the pressing surface of the caulking tool in a state where the protruding shaft is inserted into the through hole of the caulking member. Thereby, the through hole of the caulking member can be prevented from being crushed, and the shape of the through hole can be maintained.

  Incidentally, it is always desired to improve the holding force of the caulking member with respect to the plate material (caulking member). However, in the technique described in Patent Document 1, as described above, the purpose is to fasten a plurality of members while maintaining the shape of the through hole of the caulking member, and the purpose is to improve the holding force of the caulking member with respect to the plate material. It is not something to do.

JP 2007-160366 A

  The present invention has been made in view of the above situation, and a problem to be solved is to provide a caulking structure and a caulking method capable of improving the holding force of a pin against a caulking member.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, a caulking member having a through hole penetrating from one side to the other side, and a pin fixed to the caulking member in a state of being inserted into the through hole, the pin An insertion portion inserted into the through-hole, a flange formed at one end of the insertion portion with a diameter larger than that of the through-hole, and abutting against one surface of the caulking member, and the insertion portion The other end of the cover member is formed to have a diameter larger than that of the through hole by plastic deformation, and includes a head that contacts the other side surface of the caulking member, and the through hole extends from the one side. The first tapered portion is formed so as to increase in diameter toward the other side, and the insertion portion has a second tapered portion formed along the first tapered portion.

  According to a second aspect of the present invention, there is provided a caulking method for fixing the pin to the caulking member by pressing and plastically deforming the pin inserted into the through hole of the caulking member, wherein a hole is formed in the pressed surface. A first step of supporting the pin in a state of being inserted into the through hole of the caulking member, and pressing the side surface of the hole of the pin radially outward while pressing the pressed surface of the pin Thus, the second step of plastically deforming the pin is provided.

  According to a third aspect of the present invention, in the second step, the rotating member inserted into the hole of the pin precesses, thereby pressing the side surface of the hole of the pin radially outward.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect, the holding force of the pin with respect to the caulking member can be improved.

  According to the second aspect, the holding force of the pin with respect to the caulking member can be improved.

  According to the third aspect, the holding force of the pin with respect to the caulking member can be improved.

The front view which showed the crimping apparatus which concerns on one Embodiment of this invention. The flowchart of the caulking method which concerns on one Embodiment of this invention. The front view which showed the state in which the head and the rod are rotating. The front view which showed the state in which the projection part of the rod was inserted in the pin hole. The front view which showed the state which the pressing surface of a rod is pressing the to-be-pressed surface of a pin. The front view which showed the state which the tip of the pin deformed plastically. The front view which showed the state in which the pin was fixed to the caulking member. The front view which showed the crimping structure which concerns on one Embodiment of this invention. The front view which showed the other example of the crimping structure which concerns on one Embodiment of this invention.

  In the following description, the directions indicated by arrows U and D in the figure are defined as an upward direction and a downward direction, respectively.

  The caulking method according to an embodiment of the present invention is a method of fixing the pin 200 to the caulking member 300 by the caulking device 100. First, the pin 200 and the caulking member 300 before being fixed by the caulking device 100 will be described with reference to FIG.

  The pin 200 is fixed to the caulking member 300 by the caulking device 100. The pin 200 is formed in a substantially cylindrical shape. The pin 200 is arranged with the axial direction facing the vertical direction. The pin 200 includes a flange portion 210, an insertion portion 220, and a pin hole 230.

  The flange portion 210 is a portion that protrudes radially outward at a midway portion in the axial direction of the pin 200. The collar portion 210 is formed in a circular plate shape in plan view.

  The insertion portion 220 is a portion that is inserted into a through hole 310 of the caulking member 300 described later. The insertion part 220 is formed in a cylindrical shape extending upward from the collar part 210. A pressed surface 220 a that is pressed by the caulking device 100 is formed at the upper end portion of the insertion portion 220.

  The pin hole 230 is a hole formed at the center of the pressed surface 220a. The pin hole 230 is formed in a circular shape in plan view. The pin hole 230 is formed so as to extend along the axial direction (vertical direction) of the pin 200.

  The caulking member 300 is a plate material to which the pin 200 is fixed by the caulking device 100. A through hole 310 is formed in the caulking member 300.

  The through hole 310 is a hole for fixing the pin 200. The through hole 310 is formed so as to penetrate the caulking member 300 in the plate thickness direction. The diameter of the through hole 310 is formed so as to be slightly larger than the outer diameter of the insertion portion 220 of the pin 200 and smaller than the outer diameter of the flange portion 210 of the pin 200.

  The caulking member 300 configured as described above is placed on the flange portion 210 of the pin 200 and is fixed by the caulking device 100 in a state where the insertion portion 220 of the pin 200 is inserted into the through hole 310.

  Next, a caulking device 100 according to an embodiment of the present invention will be described with reference to FIG.

  The caulking device 100 fixes the pin 200 to the caulking member 300. The caulking device 100 includes a jig 110, a head 130, and a rod 140.

  The jig 110 supports the pin 200. The jig 110 is formed in an appropriate shape that can support the pin 200.

  The head 130 is configured to be rotatable and liftable. The head 130 is provided above the jig 110. The head 130 is provided so as to be rotatable about a rotation axis S extending in the vertical direction by a motor (not shown). Further, the head 130 is provided so as to be movable up and down (movable in the vertical direction) by a cylinder (not shown).

  The rod 140 presses the pin 200. The rod 140 is fixed to the lower part of the head 130. As a result, the rod 140 can rotate integrally with the head 130 around the rotation axis S. The rod 140 includes a main body 141 and a protrusion 142.

  The main body 141 forms the main structure of the rod 140. The main body 141 is formed in a cylindrical shape. The main body 141 is provided such that the axial direction is inclined with respect to the rotation axis S of the head 130. Specifically, the main body 141 is provided such that the horizontal distance between the axis of the main body 141 and the rotation axis S increases as it goes upward. A pressing surface 141 a that presses the pin 200 is formed on the lower surface of the main body 141.

  The protruding portion 142 is a portion protruding from the pressing surface 141a. The protrusion 142 has a smaller diameter than the main body 141 and is formed in a columnar shape having substantially the same diameter as the pin hole 230. The protruding portion 142 is formed so that the axial direction coincides with the main body portion 141. That is, the protrusion 142 is provided such that the axial direction is inclined with respect to the rotation axis S of the head 130. The protrusion 142 is formed to have a diameter that decreases toward the lower side in the axial direction. The lower part of the protrusion 142 is formed in a curved surface (spherical shape). The protrusion 142 is formed so that the center of the circle at the lower end is located on the rotation axis S.

  Next, a caulking method according to an embodiment of the present invention will be described with reference to FIGS.

  The caulking method according to an embodiment of the present invention is a method of fixing (caulking) the pin 200 to the caulking member 300 using the caulking device 100. As shown in FIG. 2, the caulking method according to an embodiment of the present invention is performed by a first step and a second step.

  First, the first process is performed (step S101). In the first step, as shown in FIG. 3, the pin 200 is disposed on the jig 110. At this time, a lower portion of the pin 200 (a portion below the flange portion 210) is accommodated inside the jig 110 (hollow portion), and the flange portion 210 of the pin 200 is placed on the upper surface of the jig 110. Further, the pin 200 is disposed so that the axial direction of the pin hole 230 coincides with the rotation axis S of the head 130.

  Next, the caulking member 300 is disposed. The caulking member 300 is placed on the flange portion 210 of the pin 200 such that the insertion portion 220 of the pin 200 is inserted into the through hole 310.

  Next, a second process is performed (step S102). In the second step, as shown in FIG. 3, the head 130 is rotated around the rotation axis S by driving a motor (not shown). Thereby, the rod 140 performs precession movement (swing movement). Specifically, the rod 140 rotates so that the upper end portion draws a horizontal circle while the axial direction maintains a constant inclination.

  Next, as shown in FIG. 4, the head 130 is lowered by driving a cylinder (not shown). At this time, the protrusion 142 of the rod 140 is inserted into the pin hole 230 in a state where the axial direction is oblique to the axial direction of the pin hole 230.

  As shown in FIG. 5, the head 130 is further lowered. The protrusion 142 rotates (precession) around the rotation axis S while pressing the side surface of the pin hole 230, thereby pushing the pin hole 230 outward in the radial direction. As a result, the meat at the distal end portion of the insertion portion 220 of the pin 200 moves so as to spread outward in the radial direction.

  As shown in FIG. 6, the head 130 is further lowered to insert the protrusion 142 into the pin hole 230. The protrusion 142 inserted to the back of the pin hole 230 rotates (precession) around the rotation axis S, so that a portion further below the insertion portion 220 (a portion facing the inner peripheral surface of the through hole 310) Move so that it spreads radially outward to the meat. As a result, the insertion part 220 is pressed against the through hole 310 of the caulking member 300.

  In this way, while pressing the side surface of the pin hole 230 outward in the radial direction by the protrusion 142, the pressed surface 220a of the pin 200 is pressed downward by the pressing surface 141a of the rod 140. At this time, since the rod 140 is inclined with respect to the rotation axis S, a part of the pressing surface 141a is in contact with the pressed surface 220a. When the rod 140 rotates around the rotation axis S with a part of the pressing surface 141a pressing the pressed surface 220a, the tip of the pin 200 is crushed downward with a relatively strong pressure. At this time, since the protrusion 142 is inserted into the pin hole 230, the meat at the tip of the pin 200 crushed downward moves radially outward.

  In this manner, the distal end portion of the insertion portion 220 of the pin 200 is plastically deformed so as to spread radially outward.

  Thereafter, as shown in FIG. 7, the head 130 is raised, and the steps of the caulking method according to the embodiment of the present invention are completed. In this way, the pin 200 can be fixed to the caulking member 300.

  Next, a caulking structure 1 according to an embodiment of the present invention will be described with reference to FIG.

  The caulking structure 1 is formed by fixing (caulking) the pin 200 shown in FIG. 1 or the like to the caulking member 300. Hereinafter, in order to clarify the difference before and after caulking, the caulking member 300 after caulking is referred to as caulking member 500, and the pin 200 after caulking is referred to as pin 600. The description of the same configuration as the caulking member 300 and the pin 200 in the caulking member 500 and the pin 600 will be omitted as appropriate.

  The caulking member 500 corresponds to the caulking member 300 described above. A through hole 510 is formed in the caulking member 500.

  The through hole 510 corresponds to the above-described through hole 310. The through hole 510 is formed so as to penetrate the caulking member 500 in the plate thickness direction. A first tapered portion 510 a is formed in the through hole 510.

  The first tapered portion 510a is a portion that is inclined so as to increase in diameter as it goes upward. The first tapered portion 510 a is formed at the upper end portion of the through hole 510.

  The pin 600 corresponds to the pin 200 described above. The pin 600 includes a flange portion 610, an insertion portion 620, a pin hole 630, and a head portion 640.

  The collar part 610 corresponds to the collar part 210 described above. The flange portion 610 is formed to have a larger diameter than the through hole 510 at the lower end portion of the insertion portion 620 described later. The flange portion 610 is formed so that the upper surface is in contact with the lower surface of the caulking member 500.

  The insertion part 620 corresponds to the insertion part 220 described above. The insertion portion 620 is formed in a substantially cylindrical shape that extends upward from the flange portion 210. The insertion portion 620 is inserted into the through hole 510 of the caulking member 500. The insertion portion 620 is formed with a second tapered portion 620a.

  The 2nd taper part 620a is a part formed so that a diameter may be expanded as it goes upwards. The second tapered portion 620a is formed on the upper portion of the insertion portion 620 along the first tapered portion 510a (so as to come into contact).

  The pin hole 630 corresponds to the pin hole 230 described above. The pin hole 630 is formed so as to increase in diameter as it goes upward.

  The head portion 640 is a portion formed by plastic deformation of the upper end portion of the insertion portion 620. The head 640 is formed with a larger diameter than the insertion portion 620. The head 640 is formed with a larger diameter than the upper end of the through-hole 510 (first tapered portion 510a). The head 640 is formed so as to contact the upper surface of the caulking member 500.

  As described above, in the second tapered portion 620a, the pin hole 230 (pin hole 630) is pushed outward in the radial direction so that the tip portion of the insertion portion 220 (insertion portion 620) spreads radially outward. It is formed by moving to. And the 1st taper part 510a is formed when the 2nd taper part 620a is pressed on the side surface of the through-hole 310 (through-hole 510). Further, the head 640 is formed so as to spread radially outward by crushing the upper end of the insertion portion 220 (insertion portion 620).

  In the caulking structure 1 configured as described above, the pin 600 is prevented from being removed from the through hole 510 of the caulking member 500 by the flange portion 610 and the head portion 640. Further, the pin 600 includes a frictional force between the flange portion 610 and the lower surface of the caulking member 500, a frictional force between the insertion portion 620 and the side surface of the through hole 510, and an upper surface of the head portion 640 and the caulking member 500. The caulking member 500 is fixed (held) by the frictional force between the two.

  According to the caulking method according to this embodiment, the pressed surface 220a of the pin 200 is pressed by the pressing surface 141a in a state where the protrusion 142 of the rod 140 is inserted into the pin hole 230 of the pin 200. It can suppress that a front-end | tip part escapes to radial inside (pin hole 230 side). Therefore, the tip of the pin 200 is likely to spread outward in the radial direction.

  Furthermore, according to the caulking method according to the present embodiment, the rod 140 applies a downward force to the pin 200 by the pressing surface 141a, and pushes the pin hole 230 outward in the radial direction by the protrusion 142. The tip end portion of 200 is more likely to spread radially outward.

  Therefore, the contact area between the upper surface of the caulking member 300 and the tip portion (crushed portion) of the pin 200 increases, so that the frictional force between the pin 200 and the caulking member 300 increases. For this reason, the holding force (caulking strength) of the pin 200 with respect to the caulking member 300 can be improved. Therefore, even if the pressing force to the pressed surface 220a of the pin 200 by the pressing surface 141a of the rod 140 is smaller than that of the conventional one, the same caulking strength as that of the conventional one can be secured.

  Further, the protrusion 142 of the rod 140 is inserted deeper than the portion of the pin 200 protruding from the caulking member 300 (to the lower side than the upper surface of the caulking member 300), and the side surface of the pin hole 230 of the pin 200 has a diameter. Press outward in the direction. Therefore, the portion of the pin 200 inserted into the through hole 310 of the caulking member 300 (the portion facing the inner peripheral surface of the through hole 310) is pushed outward in the radial direction. Therefore, the portion of the pin 200 that is pushed outward in the radial direction is pressed against the through hole 310 of the caulking member 300. For this reason, the frictional force between the inner peripheral surface of the through-hole 310 of the caulking member 300 and the outer peripheral surface of the pin 200 can be improved. Accordingly, the caulking strength can be improved.

  Further, according to the caulking structure 1 according to the present embodiment, the first taper portion 510a and the second taper portion 620a are formed, so that even if a part of the head 640 is broken, the pin 600 is moved downward. It can be difficult to escape. Therefore, the pin 600 can be easily held with respect to the caulking member 500. Further, since the first taper portion 510a and the second taper portion 620a are formed, the pin 600 is caulked even if a sag or dimensional tolerance occurs when the through hole 310 (through hole 510) is molded by a press. Therefore, sagging and dimensional tolerance can be allowed.

As described above, the caulking structure 1 according to the present embodiment is fixed to the caulking member 500 with the caulking member 500 having the through hole 510 penetrating from one side to the other side and being inserted into the through hole 510. The pin 600 is formed with an insertion portion 620 inserted into the through hole 510 and a diameter larger than that of the through hole 510 at one end of the insertion portion 620. A flange portion 610 that contacts one surface of the caulking member 500 and the other end portion of the insertion portion 620 are formed to have a larger diameter than the through hole 510 by plastic deformation, and the other side of the caulking member 500 And the through hole 510 has a first taper portion 510a formed so as to increase in diameter from the one side toward the other side, and the insertion 620 is one which has a second taper portion 620a formed along the first tapered portion 510a.
By comprising in this way, the retention strength of the pin 200 with respect to the caulking member 300 can be improved.

The caulking method according to the present embodiment is a caulking method for fixing the pin 200 to the caulking member 300 by pressing and plastically deforming the pin 200 inserted into the through hole 310 of the caulking member 300. A first step of supporting the pin 200 having the pin hole 230 formed in the pressed surface 220a in a state of being inserted into the through hole 310 of the caulking member 300; and the pressed surface 220a of the pin 200. A second step of plastically deforming the pin 200 by pressing the side surface of the pin hole 230 of the pin 200 radially outward while pressing.
By comprising in this way, the retention strength of the pin 200 with respect to the caulking member 300 can be improved.

In the second step, the rod 140 (rotating member) inserted into the pin hole 230 of the pin 200 precesses, thereby pressing the side surface of the pin hole 230 of the pin 200 outward in the radial direction. To do.
By comprising in this way, the retention strength of the pin 200 with respect to the caulking member 300 can be improved.

The jig 110 is an embodiment of the support portion.
Further, the rod 140 is an embodiment of the pressing portion and the rotating member.
The pin hole 230 is a form of a pin hole.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said structure, A various change is possible within the range of the invention described in the claim.

  For example, in this embodiment, the pin 200 is fixed to one member (the caulking member 300). However, the pin 200 is fixed to a plurality of members, and the plurality of members are fastened to each other. May be.

  In the present embodiment, the entire rod 140 is formed so as to extend obliquely with respect to the rotation axis S direction. However, the present invention is not limited to this, and the protrusion 142 is provided in the rotation axis S direction. It suffices if it is formed so as to protrude in an oblique direction.

  Further, in the caulking structure 1 of the present embodiment, the first tapered portion 510a and the second tapered portion 620a are formed in part of the through hole 510 and the insertion portion 620, respectively, but the present invention is not limited thereto. Instead, it may be entirely formed in the through hole 510 and the insertion portion 620 as shown in FIG.

  In the present embodiment, the taper shape (first taper portion 510a) is not formed in the through hole 310 of the caulking member 300 before caulking, but the taper shape is formed before caulking. Also good.

1 Caulking Structure 200 Pin 220a Pressed Surface 230 Pin Hole 300 Caulking Member 310 Through Hole 500 Caulking Member 510 Through Hole 510a First Tapered Portion 600 Pin 610 Gutter 620 Insertion Portion 620a Second Taper Portion 640 Head

Claims (3)

A caulking member having a through hole penetrating from one side to the other side;
A pin fixed to the caulking member in a state of being inserted into the through hole;
Comprising
The pin is
An insertion portion to be inserted into the through hole;
A flange that is formed at one end of the insertion portion with a diameter larger than that of the through hole, and abuts against a surface on one side of the caulking member;
The other end of the insertion portion is plastically deformed to form a larger diameter than the through hole, and a head that contacts the other side surface of the caulking member;
Comprising
The through hole is
Having a first tapered portion formed so as to increase in diameter from the one side toward the other side;
The insertion part is
Having a second tapered portion formed along the first tapered portion;
Caulking structure. A caulking method for fixing the pin to the caulking member by pressing and plastically deforming the pin inserted into the through hole of the caulking member,
A first step of supporting a pin having a hole formed in the pressed surface in a state of being inserted into the through hole of the caulking member;
A second step of plastically deforming the pin by pressing the side surface of the hole of the pin radially outward while pressing the pressed surface of the pin;
Comprising
Caulking method. In the second step,
When the rotating member inserted into the hole of the pin precesses, the side surface of the hole of the pin is pressed radially outward.
The caulking method according to claim 2.

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