JP4374589B2 - Pipe joint connection structure for integrally joining pipes and pipe joints of dissimilar metal members constituting a bicycle frame, and manufacturing method thereof - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a pipe joint connecting structure for integrally joining pipes and pipe joints of dissimilar metal members constituting a bicycle frame, and a method for manufacturing the same.
[0002]
[Prior art]
Conventionally, pipe joints of dissimilar metal members have different linear expansion coefficients depending on the metal, and therefore, in particular, a structure is not manufactured by joining dissimilar metal members having greatly different linear expansion coefficients.
[0003]
[Problems to be solved by the invention]
However, products are required to satisfy customers in the best fashion. For example, bicycles are required to be lighter, more beautiful, longer lasting, and newer than conventional technology, compared to conventional bicycles.
[0004]
In view of this, the present invention devises a structure of a dissimilar metal member and a method of manufacturing the dissimilar metal member by enabling joining of dissimilar metal members, and intends to realize the demand imposed on the manufacturer.
[0005]
[Means for Solving the Problems]
A pipe joint provided with a cylindrical press-fit insertion part projecting from the pipe joint body and a pipe whose end is press-fitted into the cylindrical press-fit insertion part are made of different metal members, and the outside of the cylindrical press-fit insertion part. It is formed in a shape pressed ridges pressed against the inner circumferential surface of the pipe by a predetermined distance around the axis on the circumferential surface at one another extend in the longitudinal direction of the tubular press-insertion portion, the said pressed ridge In a pipe joint connection structure for integrally joining pipes and pipe joints of dissimilar metal members constituting a bicycle frame in which an adhesive interposition gap for interposing an adhesive is interposed between an inner peripheral surface of the pipe, the proximally outside peripheral surface of the Jo press-insertion portion, across the gap adhesive interposed in the circumferential direction to form a press-fit ring portion of the outer peripheral surface of the same height of the press-fitting protrusion, the press-fitting protrusion required width recessed set to adhesive interposed for press-fitting protrusion of the distal end side of the intermediate from the press-fit ring portion in Forming between, a said tubular press-insertion portion, one plant adhesive interposed for clearance between the press-fitting protrusion and press-fit protrusion of the distal side of the press-fit ring portion to avoid the maximum site stress load is applied , there pipes and pipe fittings of dissimilar metal members constituting the bicycle frame obtained by forming an inflation adjustment slit which opens out into the pipe joint connecting structure for joining together in the insertion direction of the pipe at the required width.
[0006]
A pipe joint provided with a cylindrical press-fit insertion part projecting from the pipe joint body and a pipe whose end is press-fitted into the cylindrical press-fit insertion part are made of different metal members, and the outside of the cylindrical press-fit insertion part. It is formed in a shape pressed ridges pressed against the inner circumferential surface of the pipe by a predetermined distance around the axis on the circumferential surface at one another extend in the longitudinal direction of the tubular press-insertion portion, the said pressed ridge In a method for manufacturing a pipe joint connection structure in which pipes and pipe joints of dissimilar metal members constituting a bicycle frame in which an adhesive intervening gap is interposed between an inner peripheral surface of a pipe and a pipe joint are integrally formed , to the tubular proximally outside peripheral surface of the press-fit insert, across the gap adhesive interposed in the circumferential direction to form a press-fit ring portion of the outer peripheral surface of the same height of the press-fitting protrusion, the adhesive interposed intermediate the press-fit ring portion from the front end side of the press-fitting projections required width concave and set The press-fit protrusion gap formed, a said tubular press-insertion portion, the adhesive interposed for clearance between the press-fitting protrusion and press-fit protrusion of the distal side of the press-fit ring portion to avoid the maximum site stress load is applied in one place, and to form an inflation adjustment slit which opens out in the direction of insertion of the pipe at the required width, after an adhesive is applied to the outer peripheral surface and inner peripheral surface of an end portion of the pipe of the tubular press-insertion portion and press fit both, the production method of heat treatment by a pipe joint for joining pipes and pipe fittings of dissimilar metal members constituting the bicycle frame Do that cures to bond the adhesive to integral connection structure is there.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
F head is bicycle, molded by aluminum, the bicycle f head includes an upper tubular press-insertion portion which projects from the upper back of the head body, in the upper tubular press-insertion portion, stainless steel ( SUS 304) end of the pipe after having produced is inserted, before Symbol upper portion cylindrical press-insertion portion of the outer peripheral surface, a predetermined interval around the axis mutually placed, and the upper tubular press-insertion portion forming a press-fit protrusion shape extending in the longitudinal direction, it forms the shape of the adhesive intervening for clearance of interposing an adhesive between the inner circumferential surface of the upper pipe and between each other the press-fitting protrusion, the upper cylinder the proximal outer circumferential surface of Jo press-insertion portion, preventing the upper fitted on the inner peripheral surface of the open end of the pipe axis cross section to prevent leakage of the adhesive is abutting the concave curvature arcuate surface leakage part is formed, crevice adhesive interposed from leakage preventing portion of its slightly apart proximally to the distal end side And a press-fitting ring portion having the same height as the circumferential surface of the press-fitting ridge is formed, and a middle of the press-fitting ring portion in the press-fitting ridge is provided with a required width recess to form an adhesive. forming an intervening for press-fitting protrusion gap, before Symbol a outer circumferential surface of the upper tubular press-insertion portion, the press-fit ring portion leading end side of the press-fitting protrusion and press-fit protrusion than that avoids up site stress load is applied integral pipe and pipe fittings of dissimilar metal members constituting the bicycle frame obtained by forming an inflation adjustment slit which opens out in the direction of insertion of the upper pipe with a required width on one place of an adhesive intervening for the gap between the Pipe joint connection structure to be joined to .
[0008]
【Example】
Hereinafter, the pipe joint connecting structure and a manufacturing method thereof for joining pipes and pipe fittings of dissimilar metal members constituting the bicycle frame of the present invention together, as an example, as shown in FIGS. 1-7, the tube bicycle head 1 a joint, the joint body of the head main body 1a, a top tube 2 and the lower pipe 3 the pipe will be described them as pipe joint connection structure 4, 5 joined together.
[0009]
First, FIG. 2, explaining the pipe joint connecting structure 4 above the pipe 2 in FIG. 4 and FIG. 5, the bicycle f head 1, as an example of dissimilar metal members, molded by aluminum, the head main body 1a Is provided with an upper cylindrical press-fit insertion portion 6 protruding from the upper back surface, and an end portion of the upper pipe 2 made of stainless steel (SUS 304) as an example of a dissimilar metal member is provided in the upper cylindrical press-fit insertion portion 6. Inserted.
[0010]
Press-fit protrusion 61 to be pressed against the inner peripheral surface of the upper pipe 2 on the axis outside circumferential surface at a predetermined mutual spacing of the upper tubular press-insertion portion 6 of the upper tubular press-insertion portion 6 It is formed in a shape extending in the longitudinal direction, and constitutes an adhesive interposing gap 8 between which the adhesive 7 is interposed between the press-fitting protrusion 61 and the inner peripheral surface of the upper pipe 2.
[0011]
Wherein the proximal outer circumferential surface of the upper tubular press-insertion portion 6, axis cross-section concave curvature arc to prevent leakage of the on the adhesive 7 fitted to the inner peripheral surface of the opening end of the pipe 2 An abutment leakage prevention portion 9 is formed on the surface , the adhesive intervening gap 8 is traversed in the circumferential direction near the proximal end a little away from the abutment leakage prevention portion 9 , and the press-fitting protrusion 61 of forming the outer peripheral surface and the press-fitting ring 63 of the same height.
[0012]
In the press-fitting ridge 61, a middle of the front end side from the press-fitting ring portion 63 is recessed with a required width to form a press-fitting ridge gap 62 for interposing an adhesive.
[0013]
A outer circumferential surface of the upper tubular press-insertion portion 6, adhesive interposed between the press-fit protrusion 61 and press-fitting protrusion 61 of the tip than the press-fit ring 63 to avoid the maximum portion where the stress load imposed side An expansion adjusting slit 10 is formed at one portion of the gap 8 so as to open inward and outward in the insertion direction of the upper pipe with a required width . For the location of the open mouth, the upper tubular press-insertion portion 6 of the bicycle f head 1 of the real施例, maximum stress, since according to the top surface A of the upper circumferential surface pointing in the arrow, the 180-degree opposite Is opened at a position moved about 45 degrees from the lowermost surface B of the lower peripheral surface to one side. An example of processing for cutting is shown in the opening of the expansion adjusting slit 10. Inflation adjusting slit 11 shown in FIG. 5, Ru shape der in case of simultaneously forming during manufacture. Also, for the width of the expansion adjustment slit 10 and expansion adjusting slit 11, is selected in the 0.1mm of about 5mm wide. In addition, in the expansion adjustment slit 10 and the expansion adjustment slit 11, a member including a metal member may be appropriately interposed.
[0014]
Then 3, described pipe joint connecting structure 5 below the pipe 3 in FIGS. The head main body 1a of the bicycle f head 1, comprises a lower tubular press-insertion portion 12 projecting from the lower back, on the lower tubular press-insertion portion 12, as an example of a dissimilar metal member, similar to the upper pipe 2 The end of the lower pipe 3 made of stainless steel (SUS 304) is inserted into
[0015]
On the outer peripheral surface of the lower tubular press-insertion portion 12, similarly to the upper tubular press-insertion portion 6, the press-fitting protrusion 121 in pressure contact with the inner circumferential surface of the lower pipe 3 is formed, the press-fitting protrusion 121 An adhesive intervening gap 13 for interposing the adhesive 7 between each other and the inner peripheral surface of the lower pipe 3 is formed.
[0016]
Wherein the proximal outer circumferential surface of the lower tubular press-insertion portion 12, about the axis cross section concave curvature arc to prevent the leakage of adhesive 7 fitted to the inner peripheral surface of the open end of the lower pipe 3 A surface abutment leakage preventing portion 14 is formed , the adhesive intervening gap 13 is traversed in the circumferential direction near the proximal end slightly away from the abutment leakage preventing portion 14 , and the press-fitting ridge 121. of which the press-fit ring portion 123 of the outer peripheral surface of the same height formed similarly.
[0017]
In the press-fitting ridge 121, similarly to the press-fitting ridge 61, a middle of the front end side from the press-fitting ring portion 123 is recessed with a required width to form an adhesive-mediated press-fitting ridge gap 122.
[0018]
A outer circumferential surface of the lower tubular press-insertion portion 12, the adhesive between the press-fit protrusions 1 21 and press-fit crash Article 1 21 of the tip than the press-fit ring portion 123 avoiding the maximum portion where the stress load imposed side in one place intervening for gaps 13 that form a inflation adjustment slit 15 which opens out in the direction of insertion of the lower pipe 3 in a required width. The position where the open mouth, the lower tubular press-insertion portion 12 of the bicycle f head 1 of the real施例, maximum stress, since according to the lowermost surface C of the lower surface circumference pointed by the arrow, the opposite of the 180 degrees An opening is made at a position moved around the axis 45 degrees from the uppermost surface D of the upper peripheral surface to one side. The opening of the expansion adjusting slit 15 shows an example of machining in the same manner as the expansion adjusting slit 10. Inflation adjustment slit 16 shown in FIG. 7, similarly to the inflation adjustment slit 11, Ru shape der in case of simultaneously forming during manufacture. The width of the Rise Zhang adjusting slit 15 and expansion adjusting slit 16, to be selected in the 0.1mm of about 5mm width, the adjusting slit 15 and expansion in adjusting slit 16, an appropriate metal member It is the same as the expansion adjustment slit 10 and the expansion adjustment slit 11 that a member including the same may be interposed.
[0019]
Since the pipe joint connection structure for integrally joining pipes and pipe joints of dissimilar metal members constituting the bicycle frame of the present invention and the manufacturing method thereof are configured as described above, the bicycle with the adhesive 7 interposed therebetween is provided. The upper pipe 2 and the lower pipe 3 are press-fitted into the upper cylindrical press-fitting insertion part 6 and the lower cylindrical press-fitting insertion part 12 of the head main body 1a of the head 1, and then the adhesive 7 is heated and cured to be the upper cylindrical press-fitting. The upper pipe 2 and the lower pipe 3 are joined to the insertion portion 6 and the lower cylindrical press-fit insertion portion 12. In this heating process, the upper cylindrical press-fitting insertion part 6 and the lower cylindrical press-fitting insertion part 12 of the head body 1a of the bicycle head 1 and the upper pipe 2 and the lower pipe 3 are made of different metals having different linear expansion rates. The joint surfaces of the upper pipe 2 and the lower pipe 3 are formed by forming, for example, the adjustment slit 10 and the adjustment slit 15 in the upper cylindrical press-fit insertion portion 6 and the lower cylindrical press-fit insertion portion 12. The surface can be expanded and contracted minutely following the mating surface, and the heat treatment can be performed without adversely affecting the cured adhesive because the minute expansion and contraction stops within the elastic region of the cured adhesive. . Moreover, even if it is exposed to the upper and lower temperatures in the usage environment, it can follow in the same manner, and the adhesive force can be maintained over a long period of time.
[0020]
Figure 8 shows an embodiment example in which the bicycle frame 17 by bonding the top tube 2 and the lower pipe 3 by using a bicycle f head 1 described above described.
[0021]
【The invention's effect】
According to the present invention, it is possible to provide a high-performance product excellent in design power such as a bicycle having the lightest weight, the highest aesthetic appearance, and the long-term durability by joining different kinds of members including different kinds of metal members.
[Brief description of the drawings]
FIG. 1 shows an example in which a pipe joint connecting structure for integrally joining pipes and pipe joints of dissimilar metal members constituting a bicycle frame or the like according to the present invention and a method for manufacturing the same to a head with a cylindrical press-fit insertion portion for a bicycle. FIG.
2 is a partially enlarged side view of a pipe joint connection structure for an upper pipe that is also formed on the upper part of the bicycle head of the embodiment of FIG. 1; FIG.
3 is a partially enlarged side view of a pipe joint connection structure for a lower pipe constructed in the lower part of the bicycle head of the embodiment of FIG. 1; FIG.
4 is an end view of the pipe joint connection structure of the upper pipe shown in FIG. 2 as viewed from the front end side. FIG.
FIG. 5 is also an end view showing an embodiment in which the slit has a different shape in the pipe joint connection structure of the upper pipe shown in FIG. 2;
FIG. 6 is also an end view of the pipe joint connection structure of the lower pipe shown in FIG. 3 as viewed from the front end side.
FIG. 7 is also an end view showing an embodiment in which the slit has a different shape in the pipe joint connection structure of the lower pipe shown in FIG. 3;
FIG. 8 shows a pipe joint connection structure for integrally joining pipes and pipe joints of dissimilar metal members constituting a bicycle frame of the present invention, and a method for manufacturing the same, and an embodiment in which a bicycle frame is constructed using a bicycle head. FIG.
FIG. 9 is a graph showing the temperature dependence of the linear expansion coefficient of stainless steel (SUS 304) and a typical metal.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bicycle head 1a Head main body 2 Upper pipe 3 Lower pipe 4 Joint connection structure 5 Joint connection structure 6 Upper cylindrical press-fit insertion part 61 Press-in protrusion 62 Press-in protrusion gap for adhesive interposition 63 Press-in ring 7 Adhesive 8 Adhesive intervening gap 9 Collision leak prevention part 10 Expansion adjustment slit 11 Expansion adjustment slit 12 Lower cylindrical press-fit insertion part 121 Press-in ridge 122 Adhesive intervening press-in ridge gap 123 Press-in ring part 13 Adhesion Gap for agent interposition 14 Abutment leak prevention part 15 Slit for expansion adjustment 16 Slit for expansion adjustment 17 Bicycle frame A Top surface B Bottom surface C Bottom surface D Top surface

Claims (2)

A pipe joint provided with a cylindrical press-fit insertion part projecting from the pipe joint body and a pipe whose end is press-fitted into the cylindrical press-fit insertion part are made of different metal members, and the outside of the cylindrical press-fit insertion part. It is formed in a shape pressed ridges pressed against the inner circumferential surface of the pipe by a predetermined distance around the axis on the circumferential surface at one another extend in the longitudinal direction of the tubular press-insertion portion, the said pressed ridge In a pipe joint connection structure for integrally joining pipes and pipe joints of dissimilar metal members constituting a bicycle frame in which an adhesive interposition gap for interposing an adhesive is interposed between an inner peripheral surface of the pipe, the proximally outside peripheral surface of the Jo press-insertion portion, across the gap adhesive interposed in the circumferential direction to form a press-fit ring portion of the outer peripheral surface of the same height of the press-fitting protrusion, the press-fitting protrusion required width recessed set to adhesive interposed for press-fitting protrusion of the distal end side of the intermediate from the press-fit ring portion in Forming between, a said tubular press-insertion portion, one plant adhesive interposed for clearance between the press-fitting protrusion and press-fit protrusion of the distal side of the press-fit ring portion to avoid the maximum site stress load is applied a pipe joint for joining pipes and pipe fittings of dissimilar metal members constituting the required width in the bicycle frame obtained by forming an inflation adjustment slit which opens out in the direction of insertion of the pipe integrally connecting structure. A pipe joint provided with a cylindrical press-fit insertion part protruding from the pipe joint body and a pipe whose end is press-fitted into the cylindrical press-fit insertion part are made of different metal members, and the outer periphery of the cylindrical press-fit insertion part A press-fitting ridge that presses against the inner peripheral surface of the pipe at a predetermined interval around the axis on the surface is formed in a shape extending in the longitudinal direction of the cylindrical press-fitting insertion portion, and the press-fitting ridge and the pipe In the method of manufacturing a pipe joint connection structure in which pipes and pipe joints of dissimilar metal members constituting a bicycle frame in which an adhesive intervening gap for interposing an adhesive is interposed between the pipe and the pipe joint are integrally formed. On the outer peripheral surface near the base end of the cylindrical press-fitting insertion portion, a press-fitting ring portion having the same height as the outer peripheral surface of the press-fitting ridge is formed across the adhesive intervening gap in the circumferential direction. the intermediate of the press-fit ring portion by Risaki end required width recessed and set in the adhesive interposed Adhesive-mediated gap between the press-fitting ridge and the press-fitting ridge on the tip side from the press-fitting ring portion, which forms the press-fitting ridge gap and avoids the maximum portion where the stress load is applied in the cylindrical press-fitting insertion portion After forming an expansion adjustment slit that opens inward and outward in the insertion direction of the pipe with a required width at one place, and after applying an adhesive to the outer peripheral surface of the cylindrical press-fit insertion portion and the inner peripheral surface of the end portion of the pipe The manufacturing method of the pipe joint connection structure which joins the pipe | tube and pipe joint of the dissimilar metal member which comprise the bicycle frame formed by press-fitting both and hardening | curing an adhesive agent by heat processing, and joining.

Images