JP6708579B2 - Member joining apparatus and member joining method - Google Patents

Description

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

In order to reduce the weight and improve the safety of automobiles, a metal with low specific gravity and high strength called high tension steel is used. High-tension steel is effective in reducing weight and improving safety, but is heavier than other low-density materials such as aluminum alloys. Further, when high tension steel is used, problems such as deterioration of formability, increase of molding load and deterioration of dimensional accuracy occur due to its high strength. In order to solve these problems, in recent years, aluminum alloy extruded materials, cast products, and press-formed products, which have a lower specific gravity than steel, have been used for vehicle parts. 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 which steel parts such as high tension steel and aluminum alloy parts are used together.

The problem with multi-materials 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 utilizing 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 (elastic body) is inserted inside the aluminum pipe, and the rubber is deformed by applying pressure to it. The aluminum pipe is expanded and deformed by caulking and joining the steel parts and the aluminum pipe.

JP, 2016-147309, A

In the joining method of Patent Document 1, precise caulking and joining at a plurality of locations at the same time have not been studied in detail. In particular, in the joining method of Patent Document 1, when caulking and joining a plurality of places at the same time, the positions of the rubbers arranged at the plurality of places are displaced, and there is a possibility that caulking and joining cannot be performed at 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 tubular body and a wall portion simultaneously at a plurality of locations.

A member joining device according to the present invention has a first central axis, and a cylindrical assembly that is linearly movable in the first central axis direction; and a position in the first central axis direction that is fixed with respect to the cylindrical assembly. A fixed shaft assembly having a tubular unit including a first pushing portion and a second pushing portion, and a second central axis inserted into the tubular assembly and extending in the same direction as the first central axis. And a first receiving part and a second receiving part whose position in the second central axis direction is fixed with respect to the axial assembly, the first receiving part and the second receiving part. The receiving portion is located radially outward of the first central axis of the tubular assembly, the first receiving portion faces the first pressing portion in the first and second central axis directions, and The second receiving portion is a shaft-shaped unit that faces the second pushing portion in the first and second central axis directions, the first pushing portion and the first receiving portion in the first and second central axis directions. And a first elastic member disposed radially outside the first central axis of the tubular assembly, the second pressing portion in the first and second central axis directions, and the second A second elastic member disposed between the receiving portion and radially outside the first central axis of the tubular assembly; and the tubular unit with respect to the first and second tubular members. And a moving mechanism for moving in the second central axis direction.

According to this configuration, the pipe body and the wall portion can be accurately and simultaneously caulked and joined at a plurality of points according to the following usage method. First, the tubular body is inserted into the holes of the plurality of walls. Next, the member joining device is inserted into the tubular body. At this time, the first elastic member and the second elastic member (hereinafter sometimes referred to simply as elastic members) and the first and second central axes (hereinafter, simply referred to as central axes) between the holes of each wall portion. ) Match the position in the direction. Then, the moving unit moves the tubular unit in the central axis direction with respect to the shaft unit. In the above configuration, the first receiving portion and the second receiving portion (hereinafter sometimes simply referred to as the receiving portion) are immovable in the central axis direction, and the first pressing portion and the second pressing portion (hereinafter simply referred to as the pressing portion). There is) is movable in the central axis direction. That is, by moving the tubular unit, the pushing portion can be brought closer to the receiving portion, and thereby the elastic member can be compressed in the central axis direction. Along with this compression, the elastic members are respectively expanded radially outward of the central axis, whereby the tube body is expanded, and the tube body is caulked and joined to the hole of the wall portion. Here, the radial direction of the center axis means the radial direction of the cylinder when the cylinder having the center axis is considered.

Particularly, in the above configuration, the first elastic member disposed between the first pressing portion and the first receiving portion and the second elastic member disposed between the second pressing portion and the second receiving portion are used. The pipe body and the wall portion can be caulked and joined at a plurality of 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 first pressing portion and the second pressing portion are fixed in the position in the central axis direction with respect to the tubular assembly, they move in synchronization with each other. Therefore, the caulking joining at the plurality of points can be simultaneously performed.

Further, according to this configuration, since the elastic member is supported by the receiving portion, the position of the elastic member in the central axis direction does not change even when caulking and joining. 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 the accurate position. Therefore, it is possible to accurately expand only the necessary portion of the tubular body without expanding the portion that does not need to be expanded, so that caulking and joining can be performed accurately.

The tubular assembly is provided with a slit extending in the first central axis direction, and at least one of the first receiving portion and the second receiving portion penetrates the tubular assembly at the slit. The cylindrical assembly may protrude outward in the radial direction of the first central axis.

According to this configuration, by providing the slit in the tubular assembly, at least one of the first receiving portion and the second receiving portion can be projected from the tubular assembly to the radial outside of the central axis. Further, since the slit extends in the central axis direction, it is possible to realize a configuration in which the tubular assembly can be moved linearly in the central axis direction outside the axial assembly. That is, it is possible to easily realize the configuration including the first receiving portion and the second receiving portion that are immovable in the central axis direction and the first pressing portion and the second pressing portion that are movable in the central axis direction as described above.

The member joining device is arranged between the first receiving 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. Between the first annular member and the second receiving portion and the second elastic member in the first and second central axis directions, and the radial outer side of the first central axis of the tubular assembly. The second annular member may be further provided.

With this configuration, the first annular member can evenly support the first elastic member, and the second annular member can evenly support the second elastic member. If the first annular member and the second annular member (hereinafter sometimes simply referred to as an annular member) are not provided, the receiving portion directly supports the elastic member, but depending on the shape of the receiving portion, the elastic portion may be elastic. Each may cause unintended deformation of the member. For example, if the receiving part has a shape that unevenly supports only a few points on the surface of the elastic member, only a few points of the elastic member that are unevenly supported are deformed unevenly and the tubular body is expanded evenly. Can not. However, if the elastic member is supported via the annular member as in the above-described configuration, a force can be uniformly 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 stable. Can be joined by caulking.

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

According to this structure, since the receiving portion is formed in point symmetry as described above, it is easy to uniformly apply a force to the elastic member. That is, it is possible to reduce the possibility of causing the above-mentioned unintentional deformation of the elastic member. The shape of the receiving portion may be, for example, a cross shape or another radial shape in the 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 axis directions into a force in the first and second central axis directions.

According to this configuration, since the acting direction of the force can be changed by the cam mechanism, the disposition of the pipe body to be caulked and joined 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 the processing machine such as the ordinary press machine into, for example, the horizontal force. Therefore, the pipe body to be caulked and joined can be arranged in the horizontal direction while using a processing machine such as an ordinary press machine. Furthermore, when the tubular 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 caulk and join accurately 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 cannot be performed due to dimensional restrictions. is there. However, in the above configuration, since the acting direction of the force can be changed by the cam mechanism, it is possible to perform caulking and joining by selecting an arbitrary arrangement that is not affected by the limit stroke without being restricted by the size.

The moving mechanism may be a pressing mechanism that presses the tubular unit.

According to this structure, the axial unit is pressed by the pressing mechanism to move in the central axis direction with respect to the tubular unit, and the tubular body and the wall portion can be accurately and simultaneously caulked and joined at a plurality of locations.

The moving mechanism may be a pulling mechanism that pulls the tubular unit.

According to this configuration, the axial unit is pulled by the pulling mechanism to move in the central axis 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 and joined, as compared with the case where the shaft-shaped unit is pressed and caulked and joined, unintentional movement of the tube body and the wall can be suppressed in many cases, so that the caulking and welding can be stably performed.

The member joining method of the present invention prepares 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, and The tubular body is inserted into the holes of the two walls, the member joining device is inserted into the tubular body, and the first elastic member and the second elastic member are moved to the first by the member joining device. Compressing in the direction of the central axis and expanding outward in the radial direction, thereby expanding and deforming at least two points of the tubular body and caulking and joining to the holes of the at least two walls.

According to this method, as described above, the position of the elastic member does not shift during caulking, so that the tubular body and the wall can be caulked and jointed accurately at a plurality of points at the same time.

ADVANTAGE OF THE INVENTION According to this invention, in a member joining apparatus and a member joining method, a pipe and a wall part can be accurately crimped and joined simultaneously in multiple places.

The perspective view which shows a tube, a wall part, and a rubber member. The perspective view of the member joining device concerning a 1st embodiment of the present invention. Sectional drawing which shows the pipe body and wall part after joining. The perspective view which shows a tube, a wall part, and a rubber member. The exploded perspective view of the member joining device concerning a 2nd embodiment. The partial cross section figure before caulking joining of the member joining device concerning a 2nd embodiment. The partial cross section figure after caulking joining of the member joining device concerning a 2nd embodiment. FIG. 6 is a partial cross-sectional view of the moving mechanism before pressing. FIG. 7 is a partial cross-sectional view of the moving mechanism after being pressed. The partial cross section figure before caulking joining of the modification of the member joining device concerning a 2nd embodiment. The partial cross section figure after caulking joining of the modification of the member joining device concerning a 2nd embodiment. The partial cross section figure before caulking joining of the member joining device concerning a 3rd embodiment. The partial cross section figure after caulking joining of the member joining device concerning a 3rd embodiment. The partial cross section figure before pulling of a moving mechanism. The partial cross-sectional view after the tension|pulling of a moving mechanism. The partial cross section figure before caulking joining of the 1st modification of the member joining device concerning a 3rd embodiment. The partial cross section figure after caulking joining of the 1st modification of the member joining device concerning a 3rd embodiment. The partial cross section figure before caulking joining of the 2nd modification of the member joining device concerning a 3rd embodiment. The partial cross section figure after caulking joining of the 2nd modification of the member joining device concerning a 3rd embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

(First 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 tubular body 100 and the wall portion 200 are not particularly limited, and may be different materials or the same material.

(First embodiment)
As shown in FIG. 1, in the present embodiment, one tubular body 100 and four wall portions 200 are caulked and joined using four rubber members (elastic members) 10. This embodiment is a conceptual illustration 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 tubular body 100 has a circular tubular shape, and may be, for example, an aluminum pipe. The wall portion 200 is a plate-shaped body in which a circular hole portion 201 through which the tubular body 100 can be inserted is formed, and may be, for example, a part of a high tension steel component. In the present embodiment, one tubular body 100 is inserted through the holes 201 of the four wall portions 200 having the same shape. The tube body 100 is expanded by the rubber member 10 at four locations, and thereby caulked and joined to the wall portion 200 at four locations.

As shown in FIG. 2, the member joining device 1 of the present embodiment includes a tubular unit 20, a shaft unit 30, four rubber members 10, and a moving mechanism M conceptually shown. The member joining device 1 is shown in FIG. 2 in a state where the rubber members 10 are separated for the sake of clarity. However, in actuality, the member joining device 1 is combined as described later (see the one-dot chain line arrow in FIG. 2 ). ) Used in.

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

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 (receiving portions) 32b. The shaft-shaped member 32 has a substantially columnar shaft portion 32a extending in the second central axis L2 direction, and the shaft portion 32a has a protruding portion (reception portion) 32b protruding outward in the radial direction of the second central axis L2. Has been formed. In other words, the protrusion 32b is fixed to the shaft-shaped assembly 31 at a position in the second central axis L2 direction. As shown in FIG. 2, when the axial unit 30 and the tubular unit 20 are combined, the first central axis L1 direction and the second central axis L2 direction coincide with each other. Therefore, hereinafter, in a state where the shaft-shaped unit 30 and the tubular unit 20 are combined, the first central axis L1 and the second central axis L2 may be collectively referred to as the central axis L. Each protruding portion 32b protrudes from the shaft portion 32a in two directions, and more specifically, 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 protrusion 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 22c of the tubular member 22 and the radial direction of the tubular member 22. It projects to the outside. Therefore, the shaft-shaped member 32 is partially movable inside and outside the tubular member 22 in the direction of the central axis L relative to the tubular member 22. Further, the protrusion 32b has a receiving surface 32c which is a flat surface perpendicular to the second central axis L2. The receiving surface 32c faces the pressing surface 22b of the flange portion 22a in the central axis L direction. Therefore, the above-described linear movement changes the distance between the receiving surface 32c and the pressing surface 22b.

The four rubber members 10 have a cylindrical shape with flat end surfaces, 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 in Shore A.

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

At the time of caulking and joining, as shown in FIG. 1, first, the tubular body 100 is inserted into the hole portions 201 of the four wall portions 200. Then, the member joining device 1 shown in FIG. 2 is inserted into the tubular body 100 in a combined state. At this time, the positions of the rubber members 10 and the hole portions 201 of the wall portions 200 in the central axis L direction are aligned, and the shaft-shaped unit 30 is fixed. Then, the tubular unit 20 is moved in the central axis L direction with respect to the shaft unit 30 by the moving mechanism M (see the arrow in FIG. 2 ). As a result, the gap between the pressing surface 22b of the flange portion 22a and the receiving 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 22b and the receiving surface 32c. Along with this compression, the rubber members 10 are respectively expanded outward in the radial direction of the central axis L, and as shown in FIG. 3, the rubber members 10 expand the respective parts of the tubular body 100, so that the tubular body 100 is covered with the wall portion 200. It is caulked and joined to the hole portion 201. The present invention is a conceptual example as described above, and in practice, the area of the receiving surface 32c is increased, or a member such as the annular indenter 40 (see FIG. 5, etc.) of the second and subsequent embodiments is used. It is preferable to perform caulking and joining.

According to the present embodiment, the pipe body 100 and the wall portion 200 can be accurately caulked and joined at four locations simultaneously.

In the configuration of this embodiment, the tubular 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 flange portions 22a are fixed in position in the central axis L direction with respect to the tubular assembly 21, they move in synchronization with each other. Therefore, the caulking joining at these four locations can be performed simultaneously.

Further, according to the present embodiment, since the rubber member 10 is supported by the protrusion 32b in the central axis L direction, the position of the rubber member 10 in the central axis L direction does not change even when caulking and joining. Therefore, the rubber member 10 can be deformed at each accurate position, and each part of the tubular body 100 can be expanded at each accurate position. Therefore, it is possible to accurately expand only the necessary part of the tubular body 100 without expanding the part that does not need to be expanded, so that the caulking can be performed accurately.

Further, according to the present embodiment, by providing the slit 22c in the tubular member 22, the projecting portion 32b can be projected from the tubular member 22 to the outside in the radial direction of the central axis L. Further, the slit 22c extends in the central axis L direction, and the protrusion 32b is arranged so as to be relatively movable in the slit 22c. Therefore, it is possible to realize a configuration in which the tubular member 22 can be linearly moved in the central axis L direction outside the shaft-shaped member 32. That is, it is possible to easily realize the above-described configuration including the protruding portion 32b that is immovable in the central axis L direction and the flange portion 22a that is movable in the central axis L direction.

(Second embodiment)
4 to 7B, the member joining device 1 of the present embodiment is substantially the same as the first embodiment except for the 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 tubular 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 easy handling.

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

The tubular unit 20 of the present embodiment includes a tubular assembly 21 composed of two first tubular members 23 and a flange portion 23a (pushing portion). The first tubular member 23 is a generally cylindrical member extending in the first central axis L1 direction. A flange portion 23a is formed at one end of the first tubular member 23. In other words, the flange portion 23a is fixed to the tubular assembly 21 at a position in the first central axis L1 direction. The outer diameter of the flange portion 23a is circular when viewed from the first central axis L1 direction. The flange portion 23a has a pressing surface 23b which is a flat surface perpendicular to the first central axis L1 direction. Further, four slits 23c are formed at the other end of the first tubular member 23. The four slits 23c are formed at equal intervals in the circumferential direction of the first tubular member 23 and extend in the first central axis L1 direction. Further, a counterbore hole 23d having a concave shape in the direction of the first central axis L1 is provided on one end surface of the first tubular member 23. The counterbore 23d has a circular shape when viewed from the direction of the first central axis L1 and has a size such that the other end of the other 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 two shaft-shaped members 33 and a protrusion (reception part) 33b. The shaft-shaped member 33 has a cylindrical shaft portion 33a extending in the second central axis L2 direction, and a protruding portion 33b protruding in four directions radially outward of the second central axis L2. In other words, the position of the protruding portion 33b in the second central axis L1 direction is fixed with respect to the shaft-shaped assembly 31. The protrusions 33b are formed at equal intervals in the circumferential direction of the shaft 33a, that is, 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 first tubular member 23, and the protrusion portion 33b has a shape that can be inserted into the slit 23c of the first tubular member 23. Therefore, when the tubular assembly 21 is linearly moved in the central axis L direction, the shaft-shaped member 33 is partially movable inside and outside the first tubular member 23 relatively in the central axis L direction. Further, the protruding portion 33b has a receiving surface 33c which is a flat surface perpendicular to the second central axis L2. The receiving surface 33c faces the pressing surface 23b in the central axis L direction. Therefore, the above-described linear movement changes the distance between the receiving surface 33c and the pressing surface 23b.

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

The two annular indenters 40 of the present embodiment are cylindrical members having the same shape and both end surfaces being flat surfaces. The annular indenter 40 has a shape that can be arranged around each first tubular member 23, that is, the first tubular member 23 can be inserted into 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 joining, and may be made of steel, for example.

As shown in FIG. 6A, when assembling these components, the rubber member 10 is arranged around the first cylindrical member 23, and subsequently the annular indenter 40 is arranged around the first cylindrical member 23. Then, the shaft portion 33a of the shaft-shaped member 33 is inserted into the first tubular member 23, and the protrusion 33b is inserted into the slit 23c of the first tubular member 23. Next, another first tubular member 23 is connected to the first tubular member 23. Then, the rubber member 10 is arranged around the first cylindrical member 23, and then the annular indenter 40 is arranged around the first cylindrical member 23. Then, the shaft portion 33a of the shaft-shaped member 33 is inserted into the first tubular member 23, and the protrusion 33b is inserted into the slit 23c of the first tubular member 23. Then, the shaft-shaped unit 30 is fixed so as to limit the movement in the central axis L direction. In the member joining device 1 assembled in this way, the shaft-shaped member 33 is arranged inside in the radial direction of the central axis L, the first cylindrical member 23 is arranged in the middle, and the annular indenter 40 and the rubber member are arranged outside. Ten are arranged. That is, the member joining device 1 has a three-layer structure. Further, in the direction of the central axis L, the shaft-shaped unit 30 and the annular indenter 40 are immovable, and the tubular unit 20 is movable.

When caulking and joining, first, the tubular body 100 is inserted into the hole portion 201 of the wall portion 200. Next, the member joining device 1 is inserted into the tubular body 100. At this time, the positions of the rubber members 10 and the hole portions 201 of the wall portions 200 in the central axis L direction are aligned and the shaft-shaped unit 30 is fixed.

As shown in FIG. 6B, after the above-described alignment, the cylindrical unit 20 is moved in the direction of the central axis L (see the arrow in the drawing) by the conceptually moving mechanism M. Along with this movement, the distance between the pressing surface 23b of the flange portion 23a and the receiving surface 33c (or the end surface of the annular indenter 40) of the protruding portion 33b of the shaft-shaped member 33 is narrowed, and the rubber member 10 is compressed in the central axis L direction. To be done. Along with this compression, the rubber members 10 are respectively expanded outward in the radial direction 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 tubular body 100 and the wall portion 200 can be accurately caulked and joined at two locations at the same time.

In the configuration of the present embodiment, the tubular body 100 and the wall portion 200 can be caulked and joined at two points by the two rubber members 10 respectively arranged between the protruding portion 33b and the flange portion 23a.

Further, according to the present embodiment, the flange portion 23a is fixed in position in the central axis L direction with respect to the tubular assembly 21, and thus moves in synchronization with each other. Therefore, the caulking joining at these two locations can be performed simultaneously.

Further, according to the present embodiment, since the rubber member 10 is supported by the receiving surface 33c of the protruding portion 33b of the shaft-shaped member 33, the two rubber members 10 in the direction of the central axis L in the caulking connection are also supported. The position does not change. 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 part of the tubular body 100 without expanding the part that does not need to be expanded, so that the caulking can be performed accurately.

Further, according to the present embodiment, by providing the slit 23c 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 23c extends in the direction of the central axis L and the protruding portion 33b is arranged so as to be relatively linearly movable within the slit 23c, the cylindrical assembly 21 is located outside the axial member 33 at the central axis L. It is possible to realize a structure that can move linearly in any direction. That is, it is possible to easily realize the above-described configuration including the protruding portion 33b that is immovable in the central axis L direction and the flange portion 23a that is movable in the central axis L direction.

Further, according to the present embodiment, the rubber members 10 can be evenly supported by the annular indenter 40. If the annular indenter 40 is not provided, the protruding portion 33b directly supports the rubber member 10. However, since the protruding portion 33b has a cruciform shape, the rubber member 10 may be unintentionally deformed. There is. Specifically, since the protruding portion 33b has a shape that unevenly supports only several points on the surface of the rubber member 10, only several unevenly supported points of the rubber member 10 are deformed unevenly, There is a possibility that the tubular body 100 cannot be expanded evenly. However, when the rubber member 10 is supported via the annular indenter 40 as in the configuration of the present embodiment, a force can be uniformly applied to the rubber member 10 in the circumferential direction of the central axis L. Prevents deformation and stabilizes caulking.

Further, according to the present embodiment, the projecting 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 shaft-shaped member 33, and more specifically, formed in a cross shape. ing. By being formed point-symmetrically in this way, it is easy to evenly apply a force to the rubber member 10. That is, it is possible to reduce the possibility of causing the unintentional deformation of the rubber member 10 as described above.

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 push-out base 74. The cam driver 71 is arranged adjacent to a vertically standing standing wall portion 73 fixed to the floor surface, and is movable in the vertical direction along the standing wall portion 73. The cam driver 71 has an inclined surface 71a for transmitting a force to the cam slider 72 at its lower portion. As the cam driver 71, for example, a press machine or the like which is often used for press working may be used. The cam slider 72 has a rail mechanism (not shown) on its lower surface and is movable in the horizontal direction. However, other than the rail mechanism, a mechanism such as a wheel that reduces the frictional force with the ground during movement may be used. Further, the cam slider 72 has an inclined surface 72a for receiving a force from the cam driver 71 at its upper portion. Therefore, the inclined surface 71a of the cam driver 71 and the inclined surface 72a of the cam slider 72 are formed to have inclinations corresponding to each other. The extrusion table 74 extends in the horizontal direction and has a flat pressing surface 74a for pressing the first tubular member 23. Further, the extrusion table 74 has a through hole 74b extending in the horizontal direction and having a circular cross section. The through hole 74b has a size that allows the shaft portion 33a of the shaft-shaped member 33 to be inserted therethrough. The extrusion table 74 is attached to the cam slider 72, and moves in the horizontal direction together with the cam slider 72.

When a vertical force (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 vertically (downward in the figure) and the cam slider 72 moves horizontally (leftward in the figure). When the cam slider 72 moves, the push-out table 74 also moves and presses the first tubular member 23. At this time, since the shaft-shaped member 33 is inserted into the through hole 74b, no force is applied from the extrusion table 74. The cam driver 71 and the cam slider 72 are examples of a cam mechanism.

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

According to the pressing mechanism 70, since the acting direction of the force can be changed by the cam mechanism, the arrangement of the tubular body 100 to be caulked and joined 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 the processing machine such as the ordinary press machine into, for example, the horizontal force. Therefore, it is possible to dispose the tubular body 100 to be caulked and joined in the horizontal direction while using a processing machine such as an ordinary press machine. Further speaking, when the tubular body 100 is a long member, it may be caulked and jointed to the plurality of wall portions 200, so that it is particularly effective to be able to caulk and joint accurately at a plurality of locations at the same time. However, when the tubular body 100 is a long member, the limit stroke is specified in equipment such as an ordinary press that applies a compressive force in the vertical direction, and therefore caulking may not be possible due to the size limitation. However, in the above configuration, since the acting direction of the force can be changed by the cam mechanism, it is possible to perform caulking and joining by selecting an arbitrary arrangement that is not affected by the limit stroke without being restricted by the size.

As shown in FIGS. 8A and 8B, as a modified example of the present embodiment, the number of joints may be three or more. In addition to the configuration of the present embodiment, the number of joints can be increased by continuously connecting the assembly including the shaft-shaped member 33, the first tubular member 23, the annular indenter 40, and the rubber member 10.

According to this modification, the number of locations that can be joined at one time can be three or more. That is, by increasing the continuous structure of the above assembly, it is possible to arbitrarily increase the number of locations that can be joined at one time.

(Third Embodiment)
9A to 10B, the member joining device 1 of the present embodiment is substantially the same as the second embodiment except for the detailed configuration. Therefore, the same parts as those in the second embodiment may be designated by the same reference numerals and the description thereof may be omitted.

As shown in FIG. 9A, the member joining device 1 of the present embodiment includes a tubular unit 20, a shaft unit 30, a rubber member 10, and an annular indenter 40.

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 (reception part) 33b, and a support indenter (reception part) 50. The shaft-shaped member 33 is the same as that of the second embodiment. The support indenter 50 is a cylindrical member and has a receiving surface 50a that is a flat surface perpendicular to the second central axis L2. The support indenter 50 has a structure capable of being fixed to a fixed object such as a floor surface, and is fixed and used in an assembled state as described later.

As shown in FIG. 9A, when assembling these components, the rubber member 10 is arranged around the first cylindrical member 23, and subsequently the annular indenter 40 is arranged around the first cylindrical member 23. Then, the protruding portion 33b of the shaft-shaped member 33 is inserted into the slit 23c of the first tubular member 23. Next, another first tubular member 23 is connected to the first tubular member 23. This connection is a connection that enables the two first cylindrical members 23 to move integrally in the direction of the central axis L by an arbitrary method such as screw fastening. Then, the rubber member 10 is arranged around the first cylindrical member 23, and subsequently the supporting indenter 50 is arranged around the first cylindrical member 23. At this time, the shaft-shaped member 33 and the first tubular member 23 penetrate the support indenter 50. Then, the shaft-shaped unit 30 is fixed so as to limit the movement in the central axis L direction. In the assembled member joining device 1, the shaft-shaped member 33 is arranged inside in the radial direction of the central axis L, the first cylindrical member 23 is arranged in the middle, and the annular indenter 40 and the rubber member 10 are arranged outside. ing. That is, the member joining device 1 has a three-layer structure. Further, in the central axis L direction, the shaft-shaped unit 30, the annular indenter 40, and the support indenter 50 are immovable, and the tubular unit 20 is movable.

When caulking and joining, first, the tubular body 100 is inserted into the hole portion 201 of the wall portion 200. Next, the member joining device 1 is inserted into the tubular body 100. At this time, the positions of the rubber members 10 and the hole portions 201 of the wall portions 200 in the central axis L direction are aligned and the shaft-shaped unit 30 is fixed.

As shown in FIG. 9B, after the above-mentioned alignment, the tubular unit 20 is pulled in the direction of the central axis L (see the arrow in the figure) by the moving mechanism M conceptually shown. Then, the space between the end surface of the annular indenter 40 and the pressing surface 23b of the flange portion 23a is narrowed, and the rubber member 10 is compressed in the central axis L direction. Along with this compression, the rubber members 10 are respectively expanded outward in the radial direction 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.

10A and 10B show a pulling mechanism 80 which is an example of the moving mechanism M (see FIGS. 9A and 9B). The pulling mechanism 80 includes a cam driver 81, a cam slider 82, a standing wall portion 83, a guide shaft member 84, and a fixture 85. The cam driver 81 is arranged adjacent to a vertically standing standing wall portion 83 fixed to the floor surface, and is movable in the vertical direction along the standing wall portion 83. The cam driver 81 has an inclined surface 81a for transmitting a force to the cam slider 82 at its lower part. For the cam driver 81, for example, a press machine or the like which 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, other than the rail mechanism, a mechanism such as a wheel that reduces the frictional force with the ground during movement may be used. Further, the cam slider 82 has an inclined surface 82a for receiving a force from the cam driver 81 at its upper portion. Therefore, the inclined surface 81a of the cam driver 81 and the inclined surface 82a of the cam slider 82 are formed to correspond to each other. The guide shaft member 84 extends horizontally through the cam slider 82 and the standing wall portion 83. The cam slider 82 and the standing wall portion 83 respectively have through holes 82b and 83a for inserting the guide shaft member 84, and the guide shaft member 84 is slidable in the through holes 82b and 83a in the horizontal direction. .. One end of the guide shaft member 84 is mechanically connected to the first tubular member 23 by the coupling mechanism 84a, and the other end is outside the cam slider 82 (on the side opposite to the standing wall portion 83) than the through hole 82b. It is connected to a locking member 84b such as a large bolt. Moreover, the fixture 85 fixes the support indenter 50 to the floor surface.

The standing wall portion 83 and the cam slider 82 are elastically connected by a coil spring 86. Therefore, the cam slider 82 is urged toward the standing wall portion 83.

When a vertical force (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 vertically (downward in the figure) and the cam slider 82 moves horizontally (rightward in the figure). When the cam slider 82 moves, the guide shaft member 84 that receives a force via the locking member 84b also moves, and pulls the first tubular member 23 via the coupling mechanism 84a. The cam driver 81 and the cam slider 82 are an example of a cam mechanism.

The standing wall portion 83 and the cam slider 82 are elastically connected by a coil spring 86. Therefore, the cam slider 82 is urged toward the standing wall portion 83.

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

As shown in FIGS. 11A and 11B, as a first modification of this embodiment, the flange portion 23a may be separated from the first tubular member 23 shown in FIGS. 9A and 9B. That is, the first tubular member 23 may be separated into the second tubular member 24 and the pressing base 60.

The second tubular member 24 has a substantially cylindrical shape, and the same slit 24a as the first tubular member 23 is formed at one end thereof. The pressing base 60 has a substantially cylindrical shape, but includes a concave seat portion 60a into which the first tubular member 23 can be inserted and placed. Further, the pressing table 60 includes a pressing surface 60b which is perpendicular to the central axis L and faces the receiving surface 33c of the shaft-shaped member 33. Further, the second tubular member 24 and the pressing base 60 are connected by an arbitrary method such as screw fastening, and can be moved integrally in the central axis L direction.

According to this modification, since the first tubular member 23 is separated into the second tubular member 24 and the pressing base 60, the degree of freedom in assembling the member joining device 1 can be improved.

As shown in FIGS. 12A and 12B, as a modified example of the present embodiment, the number of joints may be three or more. In addition to the configuration of the present embodiment (FIGS. 10A and 10B), the assembly including the shaft-shaped member 33, the first tubular member 23, the annular indenter 40, and the rubber member 10 is made continuous to form a joint portion. Can be increased.

According to this modification, the number of locations that can be joined at one time can be three or more. That is, by increasing the continuous structure of the above assembly, it is possible to arbitrarily increase the number of locations that can be joined at one time.

Although specific embodiments of the present invention and modifications 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, a combination of the contents of the individual embodiments may be an embodiment of the present invention.

1 member joining device 10 rubber member (elastic member)
20 tubular unit 21 tubular assembly 22 tubular member 22a flange part (pushing part)
22b Pushing surface 22c Slit 23 First tubular member 23a Flange portion (pushing portion)
23b Pushing surface 23c Slit 23d Counterbore hole 24 Second tubular member 24a Slit 30 Shaft unit 31 Shaft assembly 32 Shaft member 32a Shaft portion 32b Projecting portion (receiving portion)
32c Receiving surface 33 Shaft member 33a Shaft portion 33b Projecting portion (reception portion)
33c Receiving surface 40 Annular indenter (annular member)
50 Support indenter (receiving part)
50a receiving surface 60 pressing base 60a seat 70 pressing mechanism (moving mechanism)
71 cam driver 71a inclined surface 72 cam slider 72a inclined surface 73 standing wall portion 74 extrusion table 74a pressing surface 74b through hole 75 coil spring 80 tension mechanism (moving mechanism)
81 cam driver 81a inclined surface 82 cam slider 82a inclined surface 82b through hole 83 standing wall portion 83a through hole 84 guide shaft member 84a coupling mechanism 84b locking member 85 fixing tool 86 coil spring 100 tube body 200 wall portion 201 hole portion

Claims (8)

A tubular assembly having a first central axis and capable of linearly moving in the first central axis direction; a first pushing portion and a first pressing portion whose position in the first central axis direction is fixed with respect to the tubular assembly; A tubular unit including two pushing parts,
A fixed axial assembly that is inserted into the tubular assembly and has a second central axis that extends in the same direction as the first central axis, and a position in the second central axis direction that is fixed with respect to the axial assembly. An axial unit including a first receiving portion and a second receiving portion, the first receiving portion and the second receiving portion being positioned radially outside of the first central axis of the tubular assembly. The first receiving portion faces the first pushing portion in the first and second central axis directions, and the second receiving portion has the second pushing portion and the first and second central axis directions. A shaft-shaped unit facing each other,
A first elastic member disposed between the first pushing 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 pressing 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,
And a moving mechanism for moving the tubular unit in the first and second central axis directions with respect to the shaft unit. The cylindrical assembly is provided with a slit extending in the first central axis direction,
At least one of the first receiving portion and the second receiving portion penetrates the tubular assembly at the slit and projects outward in the radial direction of the first central axis of the tubular assembly. The member joining apparatus according to item 1. A first annular member arranged between the first receiving 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 disposed between the second receiving 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 apparatus according to claim 1, further comprising: In a cross section perpendicular to the first and second central axis directions, at least one of the first receiving portion and the second receiving portion is formed point-symmetrically about the first and second central axes. The member joining device according to any one of claims 1 to 3. The moving mechanism includes a cam mechanism that converts a force acting in a direction other than the first and second central axis directions into a force in the first and second central axis directions. The member joining apparatus 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 tubular unit. The member joining device according to claim 1, wherein the moving mechanism is a pulling mechanism that pulls the tubular unit. Preparing 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,
Inserting the tubular body into the holes of the at least two walls,
Insert the member joining device inside the tube,
By the member joining device, the first elastic member and the second elastic member are compressed in the first central axis direction and expanded outward in the radial direction, thereby expanding and deforming at least two locations of the tubular body. A member joining method, comprising caulking and joining the holes of the at least two walls.

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