JP2007160366A - Caulking tool and caulking method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a caulking member with a plurality of members joined, to have a functional hole capable of supporting a shaft, bearing, etc. <P>SOLUTION: As a caulking tool, a lower die S1 for holding a head 12 of the caulking member 10 and an upper die U1 provided with a pushing surface P for pushing in the axial direction by abutting on the tip end part of the shaft part 14, are used. In the caulking member 10, a through-hole 16 is beforehand formed. The upper die U1 is provided with a projective shaft V extended from the pushing surface P and the tip end part of the shaft part 14 in the caulking member is crushed with the pushing surface P in a state in which the projective shaft V is inserted into the through-hole 16. The through-hole 16 inserted with the projecting shaft V can maintain the same shape without deforming the hole shape. In this way, in a state in which the plate materials 40, 44 are joined with the caulking member 10, this through-hole 16 can be used as the functional hole capable of smoothly supporting the shaft F of the other functional member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a crimping tool and a crimping method for penetrating a plurality of members and fastening the members together.

  Conventionally, as shown in FIG. 5, there is a caulking structure that penetrates a plurality of members and fastens the members together. That is, as shown in FIG. 5A, a simple solid pin-shaped caulking member 50 having a solid round bar-shaped shaft portion 54 following the head 52 is used, for example, to form two plate members 40, 44. The shaft portion 54 is inserted into the provided fastening hole, and the crimping member 50 is sandwiched between the upper mold U and the lower mold S and compressed in the axial direction, as shown in FIG. Thereby, the front-end | tip of the axial part 54 protruded on the opposite side with respect to the head 52 is crushed and diameter-expanded, and both board | plate materials 40 and 44 are fastened.

By the way, as mentioned above, the plate members 40 and 44 fastened to each other are rarely intended to be fastened, and there are many examples of forming a structural wall that supports other shafts and bearings in the vicinity of the fastening portion. .
Therefore, separate members such as a housing that directly supports the shaft and bearings are set and assembled to the plate material. However, when these separate members increase, the management of the components becomes complicated and many assembly processes are required. Requires jigs and molds. Further, the arrangement may interfere with the caulking member, or when the assembly of the separate member is welding, the separate member itself may be distorted by the heat and the dimensional accuracy may be reduced.

Therefore, if a caulking member with a plurality of members fastened has a support function such as a shaft or a bearing, there is no need to separately set a housing for supporting the other member, and there is a risk of interference or a decrease in accuracy. The number of points can be reduced, and a simple configuration is realized.
For this reason, it is conceivable to form a through hole in advance in the axial direction in order to support a shaft, a bearing, etc., and to make the caulking member a hollow cylindrical shape, but even if such a caulking member is used, When compressed by the mold U and the lower mold S, the hollow cylindrical shape is also crushed, resulting in a failure to perform a support function such as a shaft or a bearing.

  Therefore, an object of the present invention is to provide a caulking tool and a caulking method capable of providing a caulking member in a state in which a plurality of members are fastened with a functional hole capable of supporting a shaft or a bearing.

  Therefore, in the present invention, the shaft portion of the caulking member composed of the head and the shaft portion following the head is inserted into a fastening hole that penetrates the plurality of members, and the tip of the shaft portion is crushed to fasten the plurality of members. In the caulking fastening, the first die and the shaft portion for holding the head of the caulking tool used for caulking fastening are provided in order to provide a functional hole that opens to at least one end side in the axial direction of the caulking member in the fastened state and can support the functional member. An end of the first mold and the second mold, in which the hole to be used as the function hole of the caulking member is opened. The mold on the side is provided with a protrusion having a diameter that matches the hole to be a functional hole and inserted through the hole.

  When crushing the tip of the shaft portion of the caulking member with the pressing surface of the second mold, it is performed in a state where the protruding portion is inserted into the hole, so that the hole shape is collapsed in the hole section where the protruding portion is inserted The shape can be maintained without being deformed. Thereby, the said hole can be used as a functional hole which can support the axis | shaft etc. of another functional member smoothly.

Next, embodiments of the present invention will be described in detail with reference to examples.
FIG. 1 shows a first embodiment.
In this embodiment, as shown in FIG. 1 (a), a caulking comprising a disc-shaped head 12 and a shaft portion 14 following the head 12, and having a through hole 16 extending from the head 12 to the entire length of the shaft portion 14. The member 10 is used. The through hole 16 has a constant diameter over the entire length as a hole to be a functional hole.
(A) of a figure has shown the state which inserted the axial part 14 of the crimping member 10 in the fastening holes 42 and 46 provided in the two board | plate materials 40 and 44 as a some member which should be fastened mutually.

As shown in FIG. 1B, the caulking tool includes an upper mold U1 and a lower mold S1.
The upper die U <b> 1 includes a pressing surface P that contacts the tip end of the shaft portion 14 of the crimping member 10, and a protruding shaft V that extends from the pressing surface P in alignment with the through hole 16 of the crimping member 10. The protruding shaft V is inserted into the entire length of the through hole 16 at a position where the pressing surface P of the upper mold U1 comes into contact with the tip (upper end) of the shaft portion 14 and begins to crush the shaft portion 14. The length L1 is set.
The lower mold S <b> 1 has a concave bearing housing portion m <b> 1 that is aligned with the outer shape of the head 12, has a concave shape that has the same diameter as the through-hole 16, with the projecting shaft V and the center axis aligned.

As shown in FIG. 1 (b), the plate members 40 and 44 and the caulking member 10 in the state shown in (a) are placed on the lower mold S1. The depth of the recess for accommodating the head 12 of the lower mold S1 is the same as the thickness of the head 12, and the plate member 40 is seated on the upper surface surrounding the recess.
Then, as shown in FIG. 1C, the shaft portion 14 is crushed by the pressing surface P in a state where the protruding shaft V of the upper mold U <b> 1 is inserted into the through hole 16 of the caulking member 10. The end portion becomes the enlarged diameter portion 18, and the two plate members 40 and 44 are fastened.

The projecting bearing compartment m1 of the lower mold S1 receives the tip (lower end) of the projecting shaft V of the upper mold U1 that strokes to the lower limit position while crushing the shaft section 14.
The lower mold S1 has a concave cross section that matches the outer shape of the head 12. However, in order to improve workability when the caulking member 10 is placed or removed, there is a slight gap between the lower mold S1 and each facing surface with the head 12. It is preferable to set a small gap. In addition, it is preferable to set a slight gap between the opposing surfaces for smooth reception between the protruding bearing insertion portion m1 and the protruding shaft V. The same applies to the following embodiments.

Since the protruding shaft V of the upper die U1 is inserted into the through hole 16 of the shaft portion 14 while the upper die U1 crushes the tip of the shaft portion 14, the through hole 16 does not reduce the diameter due to crushing. Keeps a constant diameter.
In this embodiment, the lower mold S1 corresponds to the first mold in the invention, and the upper mold U1 corresponds to the second mold. The projecting shaft V constitutes a projecting portion, and the projecting bearing insertion portion m1 corresponds to the escape portion.

The present embodiment is configured as described above, and in the fastening of the plate material using the caulking member 10 provided with the through hole 16 from the head 12 to the shaft portion 14, the pressing surface P on which the upper mold U <b> 1 presses the tip of the shaft portion 14. Provided with a projecting shaft V extending in alignment with the through hole 16 of the caulking member 10, and the shaft portion 14 is pressed with the projecting shaft V inserted into the through hole 16. The shape of the shaft 16 can be maintained without being deformed as the shaft portion 14 is crushed.
Therefore, as shown in FIG. 1 (d), the caulking member 10 can support the end portion of the shaft F of another functional member so as to be smoothly slidable in a long range using the through hole 16 as a functional hole.

  Further, the lower mold S1 is aligned with the outer shape of the head 12, and has a projecting bearing insertion portion m1 corresponding to the through hole coaxially with the through hole 16 of the caulking member 10, and the upper mold U1 has the shaft portion 14. Since the tip (lower end) of the projecting shaft V of the upper mold U1 is received while the stroke is crushed to the lower limit position, the projecting shaft V can be extended over the entire length of the through hole 16, and the caulking member 10 has a hollow cylindrical shape. Crushing can be reliably prevented over the entire length.

FIG. 2 shows a second embodiment.
Here, the same caulking member 10 as in the first embodiment is used. 2A is the same as FIG. 1A. The caulking tool includes an upper mold U2 and a lower mold S2.
As shown in FIG. 2B, the lower mold S <b> 2 includes a protruding shaft T that matches the outer shape of the head 12 of the caulking member 10 and matches the through hole 16 of the caulking member 10.
The protruding shaft T of the lower mold S2 is inserted over the entire length of the through hole 16 at a position where the pressing surface of the upper mold U2 comes into contact with the tip of the shaft portion 14 and starts to crush the shaft portion 14. The length L2 is set.
The upper mold U <b> 2 has a concave-shaped protruding bearing insertion portion m <b> 2 having the same diameter as the through hole 16 with the protruding axis T and the central axis coinciding with each other on the pressing surface.

As shown in FIG. 2 (b), the plate members 40 and 44 and the crimping member 10 in the state shown in (a) are placed on the lower mold S2.
Then, as shown in FIG. 2C, in a state where the protruding shaft T of the lower mold S2 is inserted into the through hole 16 of the caulking member 10, the shaft portion 14 is crushed by the pressing surface P of the upper mold U2. The end portion of the shaft portion 14 becomes the enlarged diameter portion 18, and the two plate members 40 and 44 are fastened.

The projecting bearing holder m2 of the upper mold U2 receives the tip (upper end) of the projecting shaft T of the lower mold S2 while the pressing surface P strokes the shaft section 14 to the lower limit position.
Since the projecting shaft T of the lower mold S2 is inserted into the through hole 16 of the shaft part 14 while the upper mold U2 crushes the tip of the shaft part 14, the through hole 16 is not reduced in diameter due to crushing. Keeps a constant diameter.
In this embodiment, the lower mold S2 corresponds to the first mold in the invention, and the upper mold U2 corresponds to the second mold. The projecting shaft T constitutes a projecting portion, and the projecting bearing insertion portion m2 corresponds to an escape portion.

In the present embodiment, the lower mold S2 is aligned with the through hole 16 of the caulking member 10 in the fastening of the plate material using the caulking member 10 provided with the through hole 16 from the head 12 to the shaft portion 14 as described above. Since the upper mold U <b> 2 presses the shaft portion 14 with the projecting shaft T extending and the projecting shaft T inserted into the through-hole 16, the through-hole 16 of the caulking member 10 is collapsed along with the collapse of the shaft portion 14. The shape can be maintained without deformation.
Therefore, as shown in FIG. 2D, the caulking member 10 can support the end portion of the shaft F of another functional member so as to be smoothly slidable in a long range with the through hole 16 as a functional hole.

FIG. 3 shows a third embodiment. This is obtained by shortening the lower mold protrusion relative to the second embodiment.
As shown in FIG. 3A, the plate members 40 and 44 and the caulking member 10 are placed on the lower mold S3.
The length L3 of the projecting shaft T ′ of the lower mold S3 is shorter than the entire length of the caulking member 10, and when the plate members 40, 44 and the caulking member 10 are placed on the lower mold S3, they are inserted into the through holes 16 of the caulking member. The upper end of the protruding shaft T ′ is lower than the tip of the shaft portion 14 of the caulking member 10.

The upper die U3 includes a flat pressing surface P that abuts on the tip of the shaft portion 14 of the caulking member 10, but does not have a protruding bearing insertion portion m2.
As shown in FIG. 3B, by crushing the tip of the shaft portion 14 protruding from the plate material 44 with the pressing surface P of the upper mold U3, the end portion of the shaft portion 14 becomes the enlarged diameter portion 18, and the two sheets The plate members 40 and 44 are fastened.
At the same time, the shaft portion 14 also collapses in the inner diameter direction above the upper end of the projecting shaft T ′, and a reduced diameter portion 19 having a reduced inner diameter is generated. Of the through hole 16 of the caulking member 10, a section in which the projecting axis T ′ of the lower mold S <b> 3 is inserted has a constant diameter.
In this embodiment, the lower mold S3 corresponds to the first mold in the invention, and the upper mold U3 corresponds to the second mold. The projecting shaft T ′ constitutes a projecting portion.

  The present embodiment is configured as described above, and the lower mold S3 matches the outer shape of the head 12 of the caulking member 10 when fastening the plate material using the caulking member 10 provided with the through holes 16 from the head 12 to the shaft portion 14. In addition, a protruding shaft T ′ that is aligned with the through hole 16 of the caulking member 10 and shorter than the entire length thereof is provided, and the tip of the shaft portion 14 is pressed flat with the protruding shaft T ′ inserted into the through hole 16. Since it presses with the upper mold | type U3 provided with the surface P, the area in which the protrusion axis | shaft T 'was inserted among the through-holes 16 of the crimping member 10 hold | maintains the shape, without deform | transforming with the crushing of the axial part 14. On the other hand, the end portion of the shaft portion 14 is crushed inward and outward in the radial direction.

  Accordingly, as shown in FIG. 3C, the caulking member 10 receives and supports the end portion of the shaft FB of the other functional member from the opening on the head 12 side, with the constant diameter portion of the through hole 16 as a functional hole. can do. Further, the reduced diameter portion 19 can restrict the axial movement of the shaft FB beyond a predetermined level.

FIG. 4 shows a fourth embodiment.
Here, as shown in FIG. 4A, a simple solid pin-shaped caulking member 50 having a solid round bar-shaped shaft portion 54 following a head 52 similar to the conventional head 52 is used. In addition, the planar shape seen from the axial direction of the head 52 is preferably a polygonal shape rather than a circular shape.
(A) of a figure has shown the state which inserted the axial part 54 of the crimping member 50 in the fastening holes 42 and 46 provided in the two board | plate materials 40 and 44 as several members which should be fastened mutually.

The caulking tool is composed of an upper mold U4 and a lower mold S4.
FIG. 4B shows a state in which the plate members 40 and 44 and the caulking member 50 in the state of FIG. 4A are placed on the lower mold S4.
The upper mold U4 includes a pressing surface P that contacts the tip of the shaft portion 54 of the caulking member 50, and a drill shaft W that extends integrally from the pressing surface at the center of the pressing surface P. The length L4 of the drill shaft W is set to a length sufficient to cut the through hole over the entire length of the caulking member 50.
The lower mold S4 has a recessed drill receiving portion n that is aligned with the outer shape of the head 52 and whose center axis coincides with the drill axis W of the upper mold U4.

In fastening the plate members 40 and 44, the upper die U4 is lowered toward the caulking member 50 on the lower die S4 while rotating.
As a result, first, the drill shaft W of the upper mold U4 starts from the upper end of the shaft portion 54 of the caulking member 50 and cuts to the head 52 to form a through hole 56 as a hole to be a functional hole.
After the through hole 56 is completely formed or immediately before, the pressing surface P of the upper mold U4 starts to press the tip of the shaft portion 54.
Thus, when the upper die U4 is stroked to a predetermined lower limit position, as shown in FIG. 4C, the end of the shaft portion 54 is crushed to become the enlarged diameter portion 18, and the two plate members 40, 44 are formed. It is concluded.

If the planar shape of the head 52 is a polygonal shape, the caulking member 50 is reliably prevented from rotating together with the upper mold U4 during the fastening operation.
In this embodiment, the lower mold S4 corresponds to the first mold in the invention, and the upper mold U4 corresponds to the second mold. The drill shaft W constitutes a protruding portion, and the drill receiving portion n corresponds to the escape portion. The through hole 56 formed by the drill shaft W is a hole that should be a functional hole.

The present embodiment is configured as described above, and the upper die U4 having the drill shaft W extended from the pressing surface P that presses the shaft portion 54 of the caulking member 50 using the conventional caulking member 50 having a simple solid pin shape. The through hole 56 is formed by lowering toward the caulking member 50 on the lower mold S4 while rotating, and the upper end of the shaft portion 54 is crushed by the pressing surface P with the drill shaft W inserted into the through hole. Therefore, crimping is performed without deforming the hole shape of the through hole 56.
Accordingly, as shown in FIG. 4D, the caulking member 50 receives the end of the shaft FC of the other functional member with the through hole 56 as a functional hole, and is the same as in the first and second embodiments. It can be slidably supported over a long range.

In addition, in each Example, although the example which fastens the two comparatively thin board | plate materials 40 and 44 by the caulking member 10 or 50 as a some member was demonstrated, a some member is not restricted to a thin plate material, Moreover, the number of sheets is also sufficient. The number is not limited to two.
Further, the diameters of the through holes 16 and 56 as the functional holes are merely examples, and can be arbitrarily set according to the characteristics of the shaft and the bearing to be supported.

  Furthermore, in each embodiment, the holes that should be functional holes are formed as through holes, but when the required functional holes are not required to penetrate as in the third embodiment, the caulking member A hole extending from one side in the axial direction to the middle may be formed, and a projecting portion (a projecting shaft, a drill shaft, etc.) having a length corresponding to the hole may be provided in the mold on the opening end side of the hole.

In the third embodiment, the drill shaft W is integrated with the pressing surface, and the entire upper die U3 is rotated for through-hole cutting by the drill shaft W. However, in the first and second embodiments as well, When crushing the shaft portion 14 of the caulking member, the top end of the shaft portion may be pressed while rotating the upper molds U1 and U2 themselves.
In the third embodiment, the drill shaft W may be made independent of the pressing surface P and only the drill shaft W may be rotated.

It is a figure which shows a 1st Example. It is a figure which shows a 2nd Example. It is a figure which shows the 3rd Example. It is a figure which shows the 4th Example. It is a figure which shows a prior art example.

Explanation of symbols

10, 50 Caulking member 12, 52 Head 14, 54 Shaft portion 16, 56 Through hole 18 Expanded portion 19 Reduced portion 40, 44 Plate material 42, 46 Fastening hole F, FB, FC Shaft m1, m2 Projection bearing insertion portion ( Escape part)
n Drill receiving part (relief part)
P Press surface S1, S2, S3, S4 Lower mold (first mold)
T, T ', V Projection shaft (projection)
U1, U2, U3, U4 Upper mold (second mold)
W Drill shaft (protruding part)

Claims (8)

In a state where the shaft portion of the caulking member composed of the head and the shaft portion following the head is inserted into a fastening hole penetrating the plurality of members, the tip of the shaft portion is crushed and the plurality of members are fastened. A caulking tool used for caulking fastening in which the caulking member in the fastening state is provided with a functional hole that opens to at least one end side in the axial direction and can support the functional member,
A first mold that holds the head and a second mold that includes a pressing surface that is in contact with the tip of the shaft and presses in the axial direction;
Of the first die and the second die, the die on the end side where the hole to be the functional hole of the caulking member opens has a diameter that matches the hole to be the functional hole, and is inserted into the hole. A caulking tool characterized by comprising a protruding portion. The caulking member has a through hole that penetrates in the axial direction in advance,
The protruding portion has a length that penetrates the through hole when the tip of the shaft portion is crushed,
The caulking tool according to claim 1, wherein the through hole is the functional hole. The caulking member has a through hole that penetrates in the axial direction in advance,
The protrusion is provided in the first mold, is set shorter than the axial length of the caulking member, and is inserted into the through hole.
The caulking tool according to claim 1, wherein when the tip of the shaft portion is crushed, the through hole whose diameter on the tip side is reduced is used as the functional hole opened to the head side. The projecting portion is a drill shaft provided in the second mold,
The caulking tool according to claim 1, wherein the hole formed by the drill shaft is the functional hole opened to at least the shaft portion side.   The caulking tool according to claim 4, wherein the drill shaft is set longer than a caulking member when the tip of the shaft portion is crushed, and the functional hole penetrates the caulking member.   The caulking tool according to claim 2 or 5, wherein an escape portion for receiving a tip of the projecting portion penetrating the caulking member is provided in the other die with respect to the die provided with the projecting portion. . With the shaft portion of the caulking member composed of the head and the shaft portion following the head being inserted into a fastening hole that penetrates the plurality of members, the head is held by the first mold, and the pressing surface of the second mold is used. In the caulking method of crushing the tip of the shaft portion and fastening the plurality of members,
Using the caulking member provided with a hole that opens to at least one end side in the axial direction,
Of the first mold and the second mold, the mold on the end side where the hole of the caulking member opens has a protruding portion having a diameter that matches the hole,
By crushing the tip of the shaft portion with the pressing surface of the second mold in a state where the protruding portion is inserted into the hole,
A caulking method comprising: a caulking member in a fastened state, wherein the hole is provided as a functional hole capable of supporting the functional member. With the shaft portion of the caulking member composed of the head and the shaft portion following the head being inserted into a fastening hole that penetrates the plurality of members, the head is held by the first mold, and the pressing surface of the second mold is used. In the caulking method of crushing the tip of the shaft portion and fastening the plurality of members,
A drill shaft extending from the pressing surface is provided in the second mold,
A hole is formed in the caulking member from the shaft side with the drill shaft,
By crushing the tip of the shaft portion with the pressing surface of the second mold in a state where the drill shaft is inserted through the hole,
A caulking method comprising: a caulking member in a fastened state, wherein the hole is provided as a functional hole capable of supporting the functional member.

Images