JP6767908B2 - Member joining device and member joining method - Google Patents

Description

The present invention relates to a member joining device and a member joining method.

A metal with low specific gravity and high strength called high tension steel is used to reduce the weight and improve safety of automobiles. High-tension steel is effective in reducing weight and improving safety, but is heavier than further low-density materials such as aluminum alloys. Further, when high tension steel is used, problems such as a decrease in formability, an increase in a forming load, and a decrease in dimensional accuracy occur due to the high strength. In order to solve these problems, extruded aluminum alloys, cast products, and press-formed products, which have a lower specific gravity than steel, have been used for vehicle parts in recent years. Since this aluminum alloy has a low specific gravity, it is effective for weight reduction, but has low strength. For this reason, multi-materials are being used in combination with steel parts such as high-tension steel and aluminum alloy parts.

The problem with multi-materialization is the joining of dissimilar metals such as steel parts and aluminum alloy parts. For example, Patent Document 1 discloses a member joining method that enables joining of dissimilar metals in multi-materialization by using an elastic body. Specifically, in the member joining method of Patent Document 1, an aluminum pipe is inserted into a hole of a steel part, a rubber member (elastic body) is inserted inside the aluminum pipe, and the rubber member is deformed by applying pressure. As a result, the aluminum pipe is expanded and deformed, and the steel parts and the aluminum pipe are caulked and joined.

JP-A-2016-147309

In the joining method of Patent Document 1, a detailed study has not been made on accurately caulking and joining a plurality of locations at the same time. If the joining method of Patent Document 1 is used to caulk and join a plurality of locations at the same time, the positions of the rubber members arranged at the plurality of locations may shift, and caulking and joining may not be possible at the correct positions.

An object of the present invention is to provide a member joining device and a member joining method capable of accurately caulking and joining a pipe body and a wall portion at a plurality of locations at the same time.

The member joining device of the present invention includes a fixed tubular assembly having a first central axis, and a first receiving portion and a second receiving portion whose positions in the first central axis direction are fixed with respect to the tubular assembly. With respect to a tubular unit including a portion, a axial assembly having a second central axis movably inserted into the tubular assembly and extending in the same direction as the first central axis, and the axial assembly. A shaft-shaped unit including a first push portion and a second push portion whose positions in the second central axial direction are fixed, and the first push portion and the second push portion are the said members of the tubular assembly. Located outside the radial direction of the first central axis, the first push portion faces the first receiving portion in the first and second central axis directions, and the second push portion is the second receiving portion. And the axial unit facing the first and second central axial directions, and between the first push portion and the first receiving portion in the first and second central axial directions, the cylinder. Between the first elastic member arranged radially outside the first central axis of the shape assembly and the second push portion and the second receiving portion in the first and second central axis directions. A second elastic member arranged radially outside the first central axis of the tubular assembly and a movement for moving the axial unit in the first and second central axial directions with respect to the tubular unit. It has a mechanism.

According to this configuration, the pipe body and the wall portion can be accurately caulked and joined at a plurality of locations at the same time according to the following usage method. First, the pipe body is inserted into the holes of the plurality of wall portions. Next, the member joining device is inserted into the pipe body. At this time, the first and second central axes (hereinafter, simply referred to as central axes) between the first elastic member and the second elastic member (hereinafter, may be simply referred to as elastic members) and the holes of each wall portion may be used. ) Align the position in the direction. Then, the axial unit is moved in the central axial direction with respect to the tubular unit by the moving mechanism. In the above configuration, the first receiving portion and the second receiving portion (hereinafter, may be simply referred to as a receiving portion) are immobile in the central axis direction, and the first pushing portion and the second pushing portion (hereinafter, simply referred to as a pushing portion) are used. Is movable in the direction of the central axis. That is, by moving the shaft-shaped unit, the push portion can be brought closer to the receiving portion, whereby the elastic member can be compressed in the central axial direction. The elastic members are each expanded in the radial direction of the central axis with this compression, whereby the pipe body is expanded and the pipe body is caulked and joined to the hole portion of the wall portion. Here, the radial direction of the central axis means the radial direction of the cylinder when the cylinder having the central axis is considered.

In particular, in the above configuration, the first elastic member arranged between the first push portion and the first receiving portion and the second elastic member arranged between the second pushing portion and the second receiving portion are used. , The pipe body and the wall part can be caulked and joined at multiple points. It should be noted that the number of joints is not limited to two, and may be three or more.

Further, according to this configuration, since the positions of the first push portion and the second push portion in the central axial direction are fixed with respect to the axial assembly, they move in synchronization with each other. Therefore, caulking joints at a plurality of locations can be performed at the same time.

Further, according to this configuration, since the elastic member is supported by the receiving portion, the position of the elastic member in the central axial direction does not change even at the time of caulking joint. Therefore, each of the plurality of elastic members can be deformed at an accurate position, and each part of the tubular body can be expanded at an accurate position. Therefore, it is possible to accurately expand only the necessary part of the tubular body without expanding the unnecessary part, so that the caulking joint can be performed accurately.

The tubular assembly is provided with a slit extending in the direction of the first central axis, and at least one of the first push portion and the second push portion penetrates the tubular assembly through the slit. The tubular assembly may protrude outward in the radial direction of the first central axis and may be arranged so as to be linearly movable in the slit.

According to this configuration, by providing a slit in the tubular assembly, at least one of the first push portion and the second push portion can be projected outward in the radial direction of the central axis from the tubular assembly. Further, since the slit extends in the central axial direction and at least one of the first push portion and the second push portion is arranged so as to be linearly movable in the slit, the axial assembly is centered inside the tubular assembly. A configuration that can move linearly in the axial direction can be realized. That is, it is possible to easily realize the configuration including the first receiving portion and the second receiving portion which are immovable in the central axis direction and the first pushing portion and the second pushing portion which are movable in the central axis direction as described above.

The member joining device is arranged between the first push portion and the first elastic member in the first and second central axial directions and outside the radial direction of the first central axis of the tubular assembly. Between the first annular member and the second push portion and the second elastic member in the first and second central axial directions, and radially outside the first central axis of the tubular assembly. At least one of the second annular members arranged in the above may be further provided.

According to this configuration, the first elastic member can press the first elastic member and / or the second annular member can equally press the second elastic member. If the first annular member and the second annular member (hereinafter, may be simply referred to as an annular member) are not provided, the push portion directly presses the elastic member, but depending on the shape of the push portion, it is elastic. There is a risk of causing unintended deformation of each member. For example, when the push portion has a shape in which only a few points on the surface of the elastic member are pressed unevenly, only a few points of the elastic member pressed unevenly are deformed unevenly, and the tubular body is expanded evenly. Can not. However, when the elastic member is pressed through the annular member as in the above configuration, a force can be evenly applied to the elastic member in the circumferential direction of the central axis, so that the elastic member is prevented from being unintentionally deformed and becomes stable. Can be caulked and joined.

In the cross section perpendicular to the first and second central axes, at least one of the first push and the second push may be formed point-symmetrically about the first and second central axes. Good.

According to this configuration, since the push portion is formed point-symmetrically as described above, it is easy to apply a force evenly to the elastic member. That is, the possibility of causing unintended deformation of the elastic member as described above can be reduced. The shape of the push portion may be, for example, a cross shape or other radial shape in the above cross section.

The moving mechanism may include a cam mechanism that converts a force acting in a direction other than the first and second central axial directions into a force acting in the first and second central axial directions.

According to this configuration, since the direction of action of the force can be changed by the cam mechanism, the arrangement of the pipe bodies to be caulked can be arbitrarily selected. For example, a processing machine such as a press machine that normally applies a compressive force applies a compressive force in the vertical direction. The cam mechanism can convert the vertical force applied by a processing machine such as this ordinary press machine into, for example, a horizontal force. Therefore, it is possible to arrange the pipes to be caulked and joined in the horizontal direction while using a processing machine such as a normal press machine. Furthermore, when the pipe body is a long member, it may be caulked and joined to a plurality of wall portions, so that it is particularly effective to be able to accurately caulk and join at a plurality of locations at the same time. However, when the pipe body is a long member like this, the limit stroke is specified in equipment such as a normal press that applies a compressive force in the vertical direction, so there is a risk that caulking may not be possible due to dimensional restrictions. is there. However, in the above configuration, since the direction of action of the force can be changed by the cam mechanism, it is possible to select and caulk any arrangement that is not affected by the limit stroke without being limited by the dimensions.

The moving mechanism may be a pressing mechanism that presses the shaft-shaped unit.

According to this configuration, the shaft-shaped unit is pressed by the pressing mechanism and moved in the central axial direction with respect to the tubular unit, and the pipe body and the wall portion can be accurately caulked and joined at a plurality of locations at the same time.

The moving mechanism may be a tension mechanism that pulls the shaft-shaped unit.

According to this configuration, the axial unit is pulled by the tension mechanism and moved in the central axial direction with respect to the tubular unit, and the tubular body and the wall portion can be accurately caulked and joined at a plurality of locations at the same time. In particular, when the shaft-shaped unit is pulled and caulked, it is often possible to suppress unintended movement of the pipe body and the wall portion as compared with the case where the shaft-shaped unit is pressed and caulked, so that stable caulking can be performed.

In the member joining method of the present invention, a tubular body, at least two wall portions provided with holes, and the member joining device according to any one of claims 1 to 6 are prepared, and at least the above-mentioned member joining device is prepared. The tubular body is inserted into the holes of the two wall portions, the member joining device is inserted into the tubular body, and the first elastic member and the second elastic member are connected by the member joining device. It involves compressing in the central axis direction and expanding it outward in the radial direction, thereby expanding and deforming at least two points of the tubular body and caulking and joining the holes of the at least two wall portions.

According to this method, as described above, since the position of the elastic member does not shift during caulking, the pipe body and the wall portion can be accurately caulked at a plurality of locations at the same time.

According to the present invention, in the member joining device and the member joining method, the pipe body and the wall portion can be accurately caulked and joined at a plurality of places at the same time.

The perspective view which shows the tube body, the wall part, and a rubber member. The perspective view of the member joining apparatus which concerns on 1st Embodiment of this invention. A cross-sectional view showing a pipe body and a wall portion after joining. The perspective view which shows the tube body, the wall part, and a rubber member. The exploded perspective view of the member joining apparatus which concerns on 2nd Embodiment. The partial cross-sectional view before caulking joining of the member joining apparatus which concerns on 2nd Embodiment. FIG. 3 is a partial cross-sectional view of the member joining device according to the second embodiment after caulking joining. Side view of the moving mechanism before pressing. Side view of the moving mechanism after pressing. FIG. 3 is a partial cross-sectional view before caulking of the first modification of the member joining device according to the second embodiment. FIG. 3 is a partial cross-sectional view after caulking of the first modification of the member joining apparatus according to the second embodiment. FIG. 3 is a partial cross-sectional view before caulking of a second modification of the member joining device according to the second embodiment. The partial cross-sectional view after caulking joining of the 2nd modification of the member joining apparatus which concerns on 2nd Embodiment. FIG. 3 is a partial cross-sectional view of the member joining device according to the third embodiment before caulking joining. FIG. 3 is a partial cross-sectional view of the member joining device according to the third embodiment after caulking joining. Side view of the moving mechanism before tension. Side view of the moving mechanism after tension. FIG. 3 is a partial cross-sectional view before caulking of a modified example of the member joining device according to the third embodiment. FIG. 3 is a partial cross-sectional view after caulking joining of a modified example of the member joining device according to the third embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In each of the following embodiments, the materials of the pipe body 100 and the wall portion 200 are not particularly limited and may be different materials or the same materials.

(First Embodiment)
As shown in FIG. 1, in the present embodiment, one pipe body 100 and four wall portions 200 are caulked and joined using four rubber members (elastic members) 10. This embodiment is a conceptual example for facilitating the understanding of the present invention. Therefore, a specific detailed configuration will be described in the second and subsequent embodiments.

As shown in FIG. 1, the tube body 100 has a circular tubular shape, and may be, for example, an aluminum pipe. The wall portion 200 is a plate-like body in which a circular hole portion 201 through which the pipe body 100 can be inserted is formed, and may be a part of a part made of high tension steel, for example. In the present embodiment, one tube 100 is inserted through the holes 201 of four wall portions 200 having the same shape. The tube body 100 is expanded by the rubber member 10 at four points, and is caulked and joined to the wall portion 200 at four points.

As shown in FIG. 2, the member joining device 1 of the present embodiment includes a tubular unit 20, a shaft-shaped unit 30, four rubber members 10, and a moving mechanism M conceptually shown. In FIG. 2, the member joining device 1 is shown in a state in which the rubber members 10 are separated for the sake of clarity, but in reality, the members are combined as described later (see the alternate long and short dash arrow in FIG. 2). ) Is used.

The tubular unit 20 of the present embodiment includes a tubular assembly 21 composed of a single tubular member 22, and four flange portions (receiving portions) 22a. The tubular member 22 is a substantially cylindrical member extending in the direction of the first central axis L1. Four flange portions (receiving portions) 22a are formed on the outer peripheral surface of the tubular member 22. In other words, the positions of the four flange portions 22a in the direction of the first central axis L1 are fixed with respect to the tubular assembly 21. One of the four flange portions 22a is formed on the end face of the tubular member 22. The outer shape of the four flange portions 22a is circular when viewed from the direction of the first central axis L1, and is large enough to allow the tubular member 22 to be inserted into the tubular body 100. The flange portion 22a has a receiving surface 22c which is a flat surface perpendicular to the first central axis L1. Further, the tubular member 22 is provided with four slits 22b extending in the direction of the first central axis L1.

The shaft-shaped unit 30 of the present embodiment includes a shaft-shaped assembly 31 composed of a single shaft-shaped member 32 and four projecting portions (pushing portions) 32b. The shaft-shaped member 32 has a substantially columnar shaft portion 32a extending in the direction of the second central shaft L2, and the shaft portion 32a has a protruding portion (pushing portion) 32b protruding outward in the radial direction of the second central shaft L2. It is formed. In other words, the position of the protruding portion 32b in the direction of the second central axis L2 is fixed with respect to the axial assembly 31. As shown in FIG. 2, when the shaft-shaped unit 30 and the tubular unit 20 are combined, the first central shaft L1 direction and the second central shaft L2 direction coincide with each other. Therefore, thereafter, in the state where the shaft-shaped unit 30 and the tubular unit 20 are combined, the first central shaft L1 and the second central shaft L2 may be collectively referred to as the central shaft L. Each protruding portion 32b protrudes from the shaft portion 32a in two directions, and in detail, is formed in an I shape when viewed from the second central axis L2 direction. The shaft portion 32a of the shaft-shaped member 32 is smaller than the inner diameter of the tubular member 22 in the radial direction, and the protruding portion 32b is larger than the outer diameter of the tubular member 22. The shaft-shaped member 32 can be inserted into the tubular member 22, and in the inserted state, the protruding portion 32b penetrates the tubular member 22 through the slit 22b of the tubular member 22 in the radial direction of the tubular member 22. It protrudes outward. Therefore, the shaft-shaped member 32 can partially move linearly in and out of the tubular member 22 in the central axis L direction. Further, the protruding portion 32b has a pushing surface 32c which is a flat surface perpendicular to the second central axis L2. The push surface 32c faces the receiving surface 22c of the flange portion 22a in the central axis L direction. Therefore, the distance between the pushing surface 32c and the receiving surface 22c changes due to the above-mentioned linear motion.

The four rubber members 10 have a cylindrical shape with both end faces flat, and are all the same. The material of the rubber member 10 is preferably, for example, urethane rubber, chloroprene rubber, CNR rubber (chloroprene rubber + nitrile rubber), or silicon rubber. Further, the hardness of the rubber member 10 is preferably 30 or more on the shore A.

In the member joining device 1, the tubular unit 20 is inserted into the shaft-shaped unit 30, and the rubber member 10 is radially outside the tubular member 22 and is arranged between the flange portion 22a and the protruding portion 32b, respectively. It is composed of things.

At the time of caulking, first, as shown in FIG. 1, the pipe body 100 is inserted into the holes 201 of the four wall portions 200. Next, the member joining device 1 shown in FIG. 2 is inserted into the pipe body 100 in a combined state. At this time, the positions of the rubber members 10 and the holes 201 of the wall portions 200 in the central axis L direction are aligned, and the tubular unit 20 is fixed. After that, the axial unit 30 is moved with respect to the tubular unit 20 in the central axis L direction by the moving mechanism M (see the arrow in FIG. 2). As a result, the space between the receiving surface 22c of the flange portion 22a and the pressing surface 32c of the protruding portion 32b is narrowed, and the rubber member 10 is compressed in the central axis L direction by the pressing surface 32c and the receiving surface 22c, respectively. Along with this compression, the rubber members 10 are each expanded toward the radial outer side of the central axis L, and as shown in FIG. 3, each part of the pipe body 100 is expanded by the rubber member 10, and the pipe body 100 is the wall portion 200. It is caulked and joined to the hole 201. The present invention is a conceptual example as described above, and practically, the area of the pressing surface 32c is increased, or a member such as the annular indenter 40 (see FIG. 5 and the like) of the second and subsequent embodiments is used. It is preferable to caulk and join them.

According to this embodiment, the pipe body 100 and the wall portion 200 can be accurately caulked and joined at four points at the same time.

In the configuration of the present embodiment, the pipe body 100 and the wall portion 200 can be caulked and joined at four points by the four rubber members 10 arranged between the flange portion 22a and the protruding portion 32b.

Further, according to the present embodiment, since the positions of the protruding portions 32b in the central axis L direction are fixed with respect to the axial assembly 31, they move in synchronization with each other. Therefore, caulking joints at these four locations can be performed at the same time.

Further, according to the present embodiment, since the rubber member 10 is supported by the flange portion 22a in the central axis L direction, the position of the rubber member 10 in the central axis L direction does not change even during caulking joining. Therefore, each of the rubber members 10 can be deformed at an accurate position, and each part of the tubular body 100 can be expanded at an accurate position. Therefore, it is possible to accurately expand only the necessary portion of the tubular body 100 without expanding the unnecessary portion, so that the caulking joint can be performed accurately.

Further, according to the present embodiment, by providing the slit 22b in the tubular member 22, the protruding portion 32b can be projected outward from the tubular member 22 in the radial direction of the central axis L. Further, since the slit 22b extends in the central axis L direction and the protruding portion 32b is arranged so as to be linearly movable in the slit 22b, the shaft-shaped member 32 is arranged inside the tubular member 22 in the central axis L direction. A configuration that can move directly can be realized. That is, it is possible to easily realize the configuration including the flange portion 22a that is immovable in the central axis L direction and the protruding portion 32b that is movable in the central axis L direction as described above.

(Second Embodiment)
With reference to FIGS. 4 to 7B, the member joining device 1 of the present embodiment is substantially the same as that of the first embodiment except for a detailed configuration. Therefore, the same parts as those shown in the first embodiment may be designated by the same reference numerals and the description thereof may be omitted.

As shown in FIG. 4, in the present embodiment, one pipe body 100 and two wall portions 200 are caulked and joined using two rubber members 10. In particular, the tubular body 100 is preferably arranged so as to extend in the horizontal direction from the viewpoint of ease of handling.

As shown in FIG. 5, the member joining device 1 of the present embodiment includes a tubular unit 20, a shaft-shaped unit 30, a rubber member 10, and an annular indenter (annular member) 40.

The tubular unit 20 of the present embodiment is a part of a tubular assembly 21 composed of a first tubular member 23 and a second tubular member 24, a flange portion 24a (receiving portion), and a fixing base 50. It is provided with a base portion 51 (receiving portion). The first tubular member 23 is a substantially cylindrical member extending in the direction of the first central axis L1. Four slits 23a are formed at one end of the first tubular member 23. The four slits 23a are formed at equal intervals in the circumferential direction of the first tubular member 23, and extend in the direction of the first central axis L1. The second tubular member 24 is also a substantially cylindrical member extending in the direction of the first central axis L1. A flange portion 24a is formed at one end of the second tubular member 24. In other words, the flange portion 24a is fixed at a position in the first central axis L1 direction with respect to the tubular assembly 21. The outer diameter of the flange portion 24a is circular when viewed from the direction of the first central axis L1. The flange portion 24a has a receiving surface 24b which is a flat surface perpendicular to the first central axis L1 direction. Further, a counterbore hole 24c (see FIGS. 6A and 6B) having a concave shape in the direction of the first central axis L1 is provided on one end surface of the second tubular member 24. The counterbore hole 24c (see FIGS. 6A and 6B) has a circular shape when viewed from the direction of the first central axis L1 and has a size in which one end of the first tubular member 23 can be partially inserted.

The shaft-shaped unit 30 of the present embodiment includes a shaft-shaped assembly 31 composed of a single shaft-shaped member 33, a protrusion (push portion) 33b, and a pusher (push portion) 60. The shaft-shaped member 33 has a columnar shaft portion 33a extending in the direction of the second central shaft L2 and a protruding portion 33b protruding outward in the radial direction of the second central shaft L2 in four directions. In other words, the position of the protruding portion 33b in the direction of the second central axis L1 is fixed with respect to the axial assembly 31. The protruding portions 33b are formed at equal intervals in the circumferential direction of the shaft portion 33a, that is, are formed in a cross shape when viewed from the second central axis L2 direction. The shaft portion 33a has a shape that can be inserted into the second tubular member 24, and the protruding portion 33b has a shape that can be inserted into the slit 23a of the first tubular member 23. Therefore, the shaft-shaped member 33 can partially move linearly in and out of the first tubular member 23 in the central axis L direction. Further, the protruding portion 33b has a pushing surface 33c which is a flat surface perpendicular to the second central axis L2. The push surface 33c faces the receiving surface 52a of the standing hole portion 52 of the fixing base 50 in the central axis L direction. Therefore, the distance between the pushing surface 33c and the receiving surface 52a changes due to the above-mentioned linear motion.

The two rubber members 10 of the present embodiment are substantially the same as those of the first embodiment, and both are cylindrical.

The annular indenter 40 of the present embodiment is a cylindrical member whose both end surfaces are flat surfaces. The annular indenter 40 has a shape that can be arranged around the first tubular member 23, that is, the first tubular member 23 can be inserted through the annular indenter 40. The material of the annular indenter 40 is not particularly limited, but is preferably a material that is not deformed by the pressing force generated during caulking, and may be made of steel, for example.

The fixing base 50 includes a cylindrical base portion 51 and a bottomed cylindrical vertical hole portion 52 that rises from the center of the base portion 51 in the direction of the second central axis L2. The base 51 is bolted to a fixing surface such as a floor surface or a wall surface (not shown). The vertical hole portion 52 has a size that allows the first tubular member 23 to be partially inserted, and has a receiving surface 52a that is a flat surface perpendicular to the second central axis L2.

The pusher 60 has a bottomed cylindrical shape. The pusher 60 has a pusher surface 60a which is a flat surface perpendicular to the central axis L. The push surface 60a faces the receiving surface 24b of the flange portion 24a in the central axis L direction.

As shown in FIG. 6A, when assembling these components, the first tubular member 23 is inserted into the fixing base 50 with the fixing base 50 fixed, and the rubber member 10 is placed around the first tubular member 23. The annular indenter 40 is subsequently arranged around the first tubular member 23. Then, the protruding portion 33b of the shaft-shaped member 33 is inserted into the slit 23a of the first tubular member 23, the second tubular member 24 is arranged around the shaft-shaped member 33, and around the second tubular member 24. The rubber member 10 is arranged. In this state, the end portion of the shaft-shaped member 33 protrudes from the second tubular member 24 and the rubber member 10. Then, the pusher 60 is arranged on the shaft-shaped member 33 so as to cover the protruding shaft-shaped member 33. In the assembled member joining device 1, the axial member 33 is arranged inside in the radial direction of the central axis L, the first tubular member 23 and the second tubular member 24 are arranged in the middle, and the annular indenter 40 is arranged on the outside. , And the rubber member 10. That is, the member joining device 1 has a three-layer structure. Further, the tubular unit 20 is immovable in the central axis L direction, particularly in the direction toward the fixed base 50, and the axial unit 30, the annular indenter 40, and the pusher 60 are movable.

At the time of caulking, first, the pipe body 100 is inserted into the hole 201 of the wall portion 200. Next, the member joining device 1 is inserted into the pipe body 100. At this time, the positions of the rubber members 10 and the holes 201 of the wall portions 200 in the central axis L direction are aligned, and the fixing base 50 is fixed, that is, the tubular unit 20 is fixed.

As shown in FIG. 6B, when the pusher 60 is moved toward the fixed base 50 in the central axis L direction by the moving mechanism M conceptually shown after the positioning, the shaft-shaped member 33 is pressed by the pusher 60. The annular indenter 40 is pressed by the shaft-shaped member 33 to move. Therefore, the space between the pressing surface 60a of the pusher 60 and the receiving surface 24b of the flange portion 24a of the second tubular member 24 is narrowed, and the rubber member 10 is compressed in the central axis L direction. At the same time, the space between the end surface of the annular indenter 40 and the receiving surface 52a of the standing hole portion 52 of the fixing base 50 is narrowed, and the rubber member 10 is compressed in the central axis L direction. Along with this compression, the rubber members 10 are each expanded toward the radial outer side of the central axis L, whereby the tubular body 100 is expanded and the tubular body 100 is caulked and joined to the hole 201 of the wall portion 200.

According to this embodiment, the pipe body 100 and the wall portion 200 can be accurately caulked and joined at two places at the same time.

In the configuration of the present embodiment, the rubber member 10 arranged between the pusher 60 and the flange portion 24a of the second tubular member 24 is arranged between the annular indenter 40 and the base portion 51 of the fixing base 50. The pipe body 100 and the wall portion 200 can be caulked and joined at two points by the rubber member 10.

Further, according to the present embodiment, since the positions of the pusher 60 and the protruding portion 33b in the central axis L direction are fixed with respect to the axial assembly 31, they move in synchronization with each other. Therefore, caulking joints at these two locations can be performed at the same time.

Further, according to the present embodiment, the rubber member 10 is supported by the receiving surface 52a of the fixing base 50, and the rubber member 10 is supported by the receiving surface 24b of the flange portion 24a of the second tubular member 24. The positions of the two rubber members 10 in the L direction of the central axis do not change even during caulking. Therefore, each of the two rubber members 10 can be deformed at an accurate position, and each part of the tubular body 100 can be expanded at an accurate position. Therefore, it is possible to accurately expand only the necessary portion of the tubular body 100 without expanding the unnecessary portion, so that the caulking joint can be performed accurately.

Further, according to the present embodiment, by providing the slit 23a in the first tubular member 23, the protruding portion 33b can be projected outward from the first tubular member 23 in the radial direction of the central axis L. Further, since the slit 23a extends in the central axis L direction and the protruding portion 33b is arranged so as to be linearly movable in the slit 23a, the shaft-shaped member 33 is arranged inside the tubular assembly 21 in the central axis L direction. A configuration that can move directly can be realized. That is, it is possible to easily realize the configuration including the flange portion 24a and the fixing base 50 that are immovable in the central axis L direction, and the protruding portion 33b and the pusher 60 that are movable in the central axis L direction.

Further, according to the present embodiment, the rubber member 10 can be pressed evenly by the pusher 60, and the rubber member 10 can be pressed evenly by the annular indenter 40. If the annular indenter 40 is not provided, the protruding portion 33b directly presses the rubber member 10, but since the protruding portion 33b has a cross shape, there is a risk of causing unintended deformation of the rubber member 10. There is. Specifically, since the protruding portion 33b has a shape that presses only a few points on the surface of the rubber member 10 unevenly, only a few points of the rubber member 10 that are pressed unevenly are deformed unevenly. There is a risk that the tubular body 100 cannot be expanded evenly. However, as in the configuration of the present embodiment, when the rubber member 10 is pressed through the annular indenter 40, a force can be evenly applied to the rubber member 10 in the circumferential direction of the central axis L, so that the intention of the rubber member 10 is Prevents deformation and enables stable caulking.

Further, according to the present embodiment, the protruding portion 33b is formed point-symmetrically with respect to the central axis L in the cross section perpendicular to the central axis L in the axial member 33, and more specifically, it is formed in a cross shape. ing. Since the rubber member 10 is formed point-symmetrically in this way, it is easy to apply a force evenly to the rubber member 10. That is, the possibility of causing unintended deformation of the rubber member 10 as described above can be reduced.

7A and 7B show a pressing mechanism 70 which is an example of the moving mechanism M (see FIGS. 6A and 6B). The pressing mechanism 70 includes a cam driver 71, a cam slider 72, a standing wall portion 73, and a columnar extrusion table 74. The cam driver 71 is arranged adjacent to a vertically standing wall portion 73 fixed to the floor surface, and can move in the vertical direction along the standing wall portion 73. The cam driver 71 has an inclined surface 71a at its lower portion for transmitting force to the cam slider 72. For the cam driver 71, for example, a press machine or the like that is often used for press working may be used. The cam slider 72 has a rail mechanism (not shown) on the lower surface and can move in the horizontal direction. However, in addition to the rail mechanism, any mechanism such as a wheel that reduces the frictional force with the ground during movement may be adopted. Further, the cam slider 72 has an inclined surface 72a above the inclined surface 72a for receiving a force from the cam driver 71. Therefore, the inclined surface 71a of the cam driver 71 and the inclined surface 72a of the cam slider 72 are formed so as to correspond to each other. The extrusion table 74 extends in the horizontal direction and has a flat pressing surface 74a for pressing the pusher 60. The extrusion table 74 is attached to the cam slider 72 and moves horizontally together with the cam slider 72.

When a force in the vertical direction (downward in the drawing) is applied to the cam driver 71, the force is transmitted from the cam driver 71 to the cam slider 72 via the inclined surfaces 71a and 72a. As a result, the cam driver 71 moves in the vertical direction (downward in the figure), and the cam slider 72 moves in the horizontal direction (leftward in the figure). When the cam slider 72 moves, the extrusion table 74 also moves and presses the pusher 60. The cam driver 71 and the cam slider 72 are examples of the cam mechanism.

The vertical wall portion 73 and the cam slider 72 are elastically connected by a coil spring 75. Therefore, the cam slider 72 is urged toward the vertical wall portion 73.

According to the pressing mechanism 70, the direction of action of the force can be changed by the cam mechanism, so that the arrangement of the pipe bodies 100 to be caulked can be arbitrarily selected. For example, a processing machine such as a press machine that normally applies a compressive force applies a compressive force in the vertical direction. The cam mechanism can convert the vertical force applied by a processing machine such as this ordinary press machine into, for example, a horizontal force. Therefore, the pipe body 100 to be caulked and joined can be arranged in the horizontal direction while using a processing machine such as a normal press machine. Furthermore, when the pipe body 100 is a long member, it may be caulked and joined to a plurality of wall portions 200, so that it is particularly effective to be able to accurately caulk and join at a plurality of locations at the same time. However, when the pipe body 100 is a long member, since the limit stroke is specified in equipment such as a normal press that applies a compressive force in the vertical direction, there is a possibility that caulking joint cannot be performed due to dimensional restrictions. However, in the above configuration, since the direction of action of the force can be changed by the cam mechanism, it is possible to select and caulk any arrangement that is not affected by the limit stroke without being limited by the dimensions.

As shown in FIGS. 8A and 8B, as a first modification of the present embodiment, a third tubular member 25 in which the first tubular member 23 and the fixing base 50 shown in FIGS. 6A and 6B are integrated is used. You may. Specifically, the third tubular member 25 includes a flange portion 25a having a receiving surface 25c corresponding to the receiving surface 52a of the fixing base 50, and a slit 25b corresponding to the slit 23a of the first tubular member 23. ..

According to this modification, caulking can be performed without providing the fixing base 50 (see FIGS. 6A and 6B). Therefore, the number of parts can be reduced and the cost can be reduced. In the case of this modification, the position of the third tubular member 25 is fixed instead of the fixing base 50 (see FIGS. 6A and 6B).

As shown in FIGS. 9A and 9B, as a second modification of the present embodiment, the number of joints may be three or more. In addition to the configuration of the first modification described above, the number of joints is increased by connecting the assembly including the shaft-shaped member 33, the third tubular member 25, the annular indenter 40, and the rubber member 10. Can be done. At this time, it is preferable that the third tubular member 25 is provided with a counterbore (not shown) for connection similar to the counterbore 24c of the second tubular member 24.

According to this modification, the number of points that can be joined at one time can be three or more. That is, by increasing the continuous configuration of the above-mentioned assembly, the number of points that can be joined at one time can be arbitrarily increased.

(Third Embodiment)
With reference to FIGS. 10A to 11B, the member joining device 1 of the present embodiment is substantially the same as the second modification of the second embodiment except for a detailed configuration. Therefore, the same parts as those shown in the second modification of the second embodiment may be designated by the same reference numerals and the description thereof may be omitted.

As shown in FIG. 10A, the member joining device 1 of the present embodiment includes a tubular unit 20, a shaft-shaped unit 30, a rubber member 10, an annular indenter 40, and a fixing plate 55 having a flat surface.

As shown in FIG. 10A, when assembling these components, the end surface of the flange portion 25a of the third tubular member 25 is brought into contact with the fixing plate 55 in a state where the fixing plate 55 is fixed perpendicularly to the central axis L. The rubber member 10 is arranged around the third tubular member 25, and subsequently the annular indenter 40 is arranged around the third tubular member 25. Then, the shaft portion 33a of the shaft-shaped member 33 is inserted into the third tubular member 25, and the protruding portion 33b is inserted into the slit 25b of the third tubular member 25. Next, the end surface of the flange portion 25a of another third tubular member 25 is brought into contact with the third tubular member 25, and the rubber member 10 is arranged around the third tubular member 25, followed by an annular indenter. 40 is arranged around the third tubular member 25. Then, the shaft portion 33a of the shaft-shaped member 33 is inserted into the third tubular member 25, and the protruding portion 33b is inserted into the slit 25b of the third tubular member 25. At this time, the two shaft-shaped members 33 are connected by an arbitrary method such as screw fastening, and move integrally in the central axis L direction. In the assembled member joining device 1, the axial member 33 is arranged inside in the radial direction of the central axis L, the third tubular member 25 is arranged in the middle, and the annular indenter 40 and the rubber member 10 are arranged outside. Has been done. That is, the member joining device 1 has a three-layer structure. Further, the tubular unit 20 is immovable, and the axial unit 30 and the annular indenter 40 are movable in the central axis L direction, particularly in the direction toward the fixed base 50.

At the time of caulking, first, the pipe body 100 is inserted into the hole 201 of the wall portion 200. Next, the member joining device 1 is inserted into the pipe body 100. At this time, the positions of the rubber members 10 and the holes 201 of the wall portions 200 in the central axis L direction are aligned, and the tubular unit 20 is fixed.

As shown in FIG. 10B, when the axial member 33 is pulled toward the fixing plate 55 in the central axis L direction by the conceptually shown tension mechanism (moving mechanism) 80 after the above alignment (see the arrow in the figure), the annular member 33 is annular. The indenter 40 is pressed by the shaft-shaped member 33 and moves. Therefore, the space between the end surface of the annular indenter 40 and the receiving surface 25c of the flange portion 25a is narrowed, and the rubber member 10 is compressed in the central axis L direction. Along with this compression, the rubber members 10 are each expanded toward the radial outer side of the central axis L, whereby the tubular body 100 is expanded and the tubular body 100 is caulked and joined to the hole 201 of the wall portion 200.

11A and 11B show a tension mechanism 80 which is an example of the moving mechanism M (see FIG. 9B). The tension mechanism 80 includes a cam driver 81, a cam slider 82, a standing wall portion 83, and a guide shaft member 84. The cam driver 81 is arranged adjacent to a vertically standing wall portion 83 fixed to the floor surface, and can move in the vertical direction along the standing wall portion 83. The cam driver 81 has an inclined surface 81a below it for transmitting force to the cam slider 82. For the cam driver 81, for example, a press machine or the like that is often used for press working may be used. The cam slider 82 has a rail mechanism (not shown) on the lower surface and is movable in the horizontal direction. However, in addition to the rail mechanism, any mechanism such as a wheel that reduces the frictional force with the ground during movement may be adopted. Further, the cam slider 82 has an inclined surface 82a above the inclined surface 82a for receiving a force from the cam driver 81. Therefore, the inclined surface 81a of the cam driver 81 and the inclined surface 82a of the cam slider 82 are formed so as to correspond to each other. The guide shaft member 84 extends horizontally through the cam slider 82 and the vertical wall portion 83. The cam slider 82 and the vertical wall portion 83 each have through holes 82b and 83a for inserting the guide shaft member 84, and the guide shaft member 84 can slide in the through holes 82b and 83a in the horizontal direction. .. One end of the guide shaft member 84 is mechanically connected to the shaft-shaped member 33 by a coupling mechanism 84a, and the other end is a bolt larger than the through hole 82b on the outside of the cam slider 82 (opposite to the vertical wall portion 83). It is connected to the locking member 84b such as.

The vertical wall portion 83 and the cam slider 82 are elastically connected by a coil spring 85. Therefore, the cam slider 82 is urged toward the vertical wall portion 83.

When a force in the vertical direction (downward in the drawing) is applied to the cam driver 81, the force is transmitted from the cam driver 81 to the cam slider 82 via the inclined surfaces 81a and 82a. As a result, the cam driver 81 moves in the vertical direction (downward in the figure), and the cam slider 82 moves in the horizontal direction (rightward in the figure). When the cam slider 82 moves, the guide shaft member 84 that receives the force via the locking member 84b also moves, and pulls the shaft-shaped member 33 via the coupling mechanism 84a. The cam driver 81 and the cam slider 82 are examples of the cam mechanism.

The vertical wall portion 83 and the cam slider 82 are elastically connected by a coil spring 85. Therefore, the cam slider 82 is urged toward the vertical wall portion 83.

According to this tension mechanism, the direction of action of the force can be changed by the cam mechanism as in the pressing mechanism 70 (see FIGS. 7A and 7B) in the second embodiment, so that the arrangement of the pipe body 100 to be caulked is arbitrarily selected. it can.

As shown in FIGS. 12A and 12B, as a modification of this embodiment, the number of joints may be three or more. In addition to the configuration of the present embodiment (FIGS. 10A and 10B), a joint portion is formed by connecting an assembly composed of a shaft-shaped member 33, a third tubular member 25, an annular indenter 40, and a rubber member 10. Can be increased.

According to this modification, the number of points that can be joined at one time can be three or more. That is, by increasing the continuous configuration of the above-mentioned assembly, the number of points that can be joined at one time can be arbitrarily increased.

Although specific embodiments of the present invention and variations thereof have been described above, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, an embodiment of the present invention may be obtained by appropriately combining the contents of the individual embodiments.

1 Member joining device 10 Rubber member (elastic member)
20 Cylindrical unit 21 Cylindrical assembly 22 Cylindrical member 22a Flange part (receiving part)
22b Slit 22c Receiving surface 23 1st tubular member 23a Slit 24 2nd tubular member 24a Flange part (receiving part)
24b Receiving surface 24c Counterbore hole 25 Third tubular member 25a Flange part (receiving part)
25b Slit 25c Receiving surface 30 Shaft unit 31 Shaft assembly 32 Shaft member 32a Shaft 32b Protruding part (push part)
32c Pushing surface 33 Shaft-shaped member 33a Shaft 33b Protruding part (pushing part)
33c push surface 40 annular indenter (annular member)
50 Fixed base 51 Base 51a Receiving surface 52 Standing hole (Receiving part)
52a Receiving surface 55 Fixing plate 60 Pusher (push part)
60a Pushing surface 70 Pushing mechanism (moving mechanism)
71 Cam driver 71a Inclined surface 72 Cam slider 72a Inclined surface 73 Standing wall 74 Extruder 74a Pressing surface 75 Coil spring 80 Tensile mechanism (moving mechanism)
81 Cam driver 81a Inclined surface 82 Cam slider 82a Inclined surface 82b Through hole 83 Standing wall part 83a Through hole 84 Guide shaft member 84a Coupling mechanism 84b Locking member 85 Coil spring 100 Tube body 200 Wall part 201 Hole

Claims (8)

A tubular unit including a fixed tubular assembly having a first central axis and a first receiving portion and a second receiving portion whose positions in the direction of the first central axis are fixed with respect to the tubular assembly. ,
An axial assembly having a second central axis that is linearly inserted into the tubular assembly and extends in the same direction as the first central axis, and a position in the second central axial direction with respect to the axial assembly. A shaft-shaped unit including a fixed first push portion and a second push portion, wherein the first push portion and the second push portion are radially outward of the first central shaft of the tubular assembly. The first push portion is located so as to face the first receiving portion in the direction of the first and second central axes, and the second push portion is the second receiving portion and the first and second central axes. Axial units facing in the direction and
A first elastic member arranged between the first push portion and the first receiving portion in the first and second central axis directions and radially outside the first central axis of the tubular assembly. When,
A second elastic member arranged between the second push portion and the second receiving portion in the first and second central axis directions and radially outside the first central axis of the tubular assembly. When,
A member joining device including a moving mechanism for moving the shaft-shaped unit in the first and second central axial directions with respect to the tubular unit. The tubular assembly is provided with a slit extending in the direction of the first central axis.
At least one of the first push portion and the second push portion penetrates the tubular assembly through the slit and projects radially outward of the first central axis of the tubular assembly, and the slit. The member joining device according to claim 1, which is arranged so as to be able to move directly inside. A first annular member arranged between the first push portion and the first elastic member in the first and second central axis directions and radially outside the first central axis of the tubular assembly. When,
A second annular member arranged between the second push portion and the second elastic member in the first and second central axis directions and radially outside the first central axis of the tubular assembly. The member joining device according to claim 1 or 2, further comprising at least one of the above. In the cross section perpendicular to the first and second central axes, at least one of the first push and the second push is formed point-symmetrically about the first and second central axes. The member joining device according to any one of claims 1 to 3. Any of claims 1 to 4, wherein the moving mechanism includes a cam mechanism that converts a force acting in a direction other than the first and second central axial directions into a force in the first and second central axial directions. The member joining device according to item 1. The member joining device according to any one of claims 1 to 5, wherein the moving mechanism is a pressing mechanism that presses the shaft-shaped unit. The member joining device according to any one of claims 1 to 5, wherein the moving mechanism is a tension mechanism that pulls the shaft-shaped unit into. A pipe body, at least two wall portions provided with holes, and a member joining device according to any one of claims 1 to 6 are prepared.
The tube is inserted into the holes of at least two walls,
The member joining device is inserted into the pipe body, and the member joining device is inserted.
The member joining device compresses the first elastic member and the second elastic member in the direction of the first central axis and expands them radially outward, thereby expanding and deforming at least two parts of the pipe body. A member joining method comprising caulking and joining the holes of at least two wall portions.

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