JP2010194579A - Joined structure of pipe and member to be joined - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joined structure of a pipe and a member to be joined which prevents the whole in a peripheral direction of the outer circumferential surface of the peripheral wall part of a pipe from parting in the axial direction in a state where the member to be joined is joined to the pipe. <P>SOLUTION: A first notched part 23 is formed extended in the axial direction of an outer fitting part 22 in a part in the peripheral direction of the part 22 for insertion of a member (bracket) 20 to be joined. A pipe (support beam body) 10 is inserted into the through hole 21 of the part 22 for insertion of the member 20 to be joined. By performing the expanding work of the pipe 10, the member 20 to be joined is joined and fixed to the pipe 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a joint structure and a joining method of a pipe and a member to be joined. This joining structure and joining method are suitably used for, for example, a steering support beam for a vehicle (eg, an automobile) and a manufacturing method thereof.

  A steering support beam is installed between the left and right front pillars of the vehicle body inside the instrument panel at the front of the automobile. By arranging such a steering support beam, sufficient rigidity and strength are ensured against an impact caused by a collision from the side surface of the vehicle body. In this steering support beam, a plurality of mounting brackets are welded and fixed to a support beam body having a hollow portion, and various on-vehicle components are fixedly mounted on the mounting brackets.

  Furthermore, the harness (wire harness) of vehicle-mounted components is generally hold | maintained along the axial direction by the support beam main body. As a method of holding the harness on the support beam body, a method of locking and holding the harness in a notch provided in a partition wall partitioning the hollow portion of the support beam body in a transverse manner, or extending the support beam body in the axial direction thereof. A method of accommodating and holding a harness in a space provided is known (see, for example, Patent Documents 1 and 2).

  Incidentally, Japanese Patent Application Laid-Open No. 2007-275932 (Patent Document 3) discloses a method of attaching a bracket to a support beam main body by a method called pipe expansion joining. In this method, the support beam body is expanded (expanded) in a state where the bracket is extrapolated to the support beam body, and thereby the bracket is joined and fixed to the support beam body.

  According to this pipe expansion joining method, there is an advantage that the bracket can be easily joined as compared with the method of joining the bracket to the support beam body by welding.

JP 2001-18841 A JP 2003-237633 A JP 2007-275932 A

  However, this pipe expansion joining method has the following drawbacks.

  The conventional bracket has an extrapolated portion that is extrapolated to the support beam main body. The extrapolated portion is formed in an annular shape that extends continuously over the entire circumference in the circumferential direction, and the inner side of the extrapolated portion. An insertion hole through which the support beam main body is inserted is formed. Therefore, when the support beam body is expanded in a state where the support beam body is inserted into the insertion hole, the entire circumferential direction of the outer peripheral surface of the peripheral wall portion of the support beam body is divided by the extrapolation portion in the axial direction. As a result, when the harness is held on the support beam main body along the axial direction, the harness interferes with the extrapolation portion, and there is a drawback that it is difficult to hold the harness on the support beam main body. Furthermore, since the harness has to be held on the support beam body across the extrapolation portion, there is a disadvantage that the length of the harness becomes long.

  The present invention has been made in view of the above-described technical background, and an object of the present invention is to easily join a member to be joined such as a bracket to a pipe such as a support beam main body, and the member to be joined to the pipe. A joined structure of a pipe and a member to be joined that can prevent the entire circumferential direction of the outer peripheral surface of the peripheral wall portion of the pipe from being cut in the axial direction in the joined state, and the joined structure An object of the present invention is to provide a method of joining a suitably used pipe and a member to be joined.

  The present invention provides the following means.

[1] A pipe having a hollow portion;
A first cutout portion that has an insertion portion provided with an insertion hole through which the pipe is inserted, and that communicates the front insertion hole and the outside of the insertion portion with a part of the outer insertion portion in the circumferential direction. A joined member formed extending in the axial direction of the extrapolated portion,
The pipe is inserted through the insertion hole of the member to be joined,
A pipe-to-join member joined structure, wherein the pipe is expanded and the joined member is joined and fixed to the pipe.

[2] A second cutout portion communicating with the hollow portion and the outside of the peripheral wall portion is formed in a part of the peripheral wall portion of the pipe in the circumferential direction so as to extend in the axial direction of the peripheral wall portion,
The preceding item 1 in which the pipe is inserted through the insertion hole of the member to be joined so that the hollow portion of the pipe communicates with the outside of the outer insertion portion through the second notch portion and the first notch portion. A joined structure of the described pipe and a member to be joined.

  [3] Both end portions of the second notch portion in the peripheral wall portion of the pipe are locked in the circumferential direction of the peripheral wall portion at both end portions of the first notch portion in the extrapolated portion of the member to be joined. 3. A joined structure of the pipe according to the preceding item 2 and a member to be joined.

  [4] The preceding item 2 or 3, wherein a closing member that closes the first notch is fitted to the first notch so as to communicate with the first notch and the second notch. Structure of a pipe and a member to be joined.

[5] A concave strip portion having an opening recessed toward the inside of the peripheral wall portion and opened toward the outside of the peripheral wall portion is formed in a part of the peripheral wall portion of the pipe in the axial direction of the peripheral wall portion. Formed to extend,
The preceding item 1 in which the pipe is inserted through the insertion hole of the member to be joined so that the inside of the concave portion of the pipe communicates with the outside of the outer insertion portion through the opening and the first cutout portion. A joined structure of the described pipe and a member to be joined.

  [6] The pipe according to item 5 above, in which a closing member that closes the first notch is fitted to the first notch in a state of being connected to the first notch and the opening. Bonding structure with members.

[7] A protruding portion that protrudes outward from the peripheral wall portion is formed in a part of the peripheral wall portion of the pipe so as to extend in the axial direction of the peripheral wall portion,
2. The pipe according to the preceding item 1, wherein the pipe is inserted into the insertion hole of the member to be joined so that the protruding portion of the pipe passes through the inside of the first notch of the member to be joined in the axial direction. Bonding structure with bonding member.

  [8] The joined structure of the pipe and the joined member according to item 7 above, wherein at least a base portion of the protruding portion of the pipe is fitted into the first notch portion of the joined member.

  [9] The pipe according to any one of the preceding items 1 to 8, wherein a partition wall partitioning the hollow part into a plurality of parts extends in the axial direction of the peripheral wall part and is integrally formed on the peripheral wall part of the pipe. Bonding structure with members.

[10] A pipe having a hollow portion;
A first cutout portion that has an insertion portion provided with an insertion hole through which the pipe is inserted, and that communicates the front insertion hole and the outside of the insertion portion with a part of the outer insertion portion in the circumferential direction. Preparing a joined member formed extending in the axial direction of the extrapolated portion,
Insert the pipe through the insertion hole of the member to be joined,
Thereafter, the pipe is expanded, and the member to be joined is joined and fixed to the pipe.

  [11] The pipe expansion process of the pipe is performed by dividing the pipe into a plurality of segments in the circumferential direction and pressing the peripheral wall part radially outward by a pipe expansion process die disposed in the hollow part. A method of joining the described pipe and a member to be joined.

[12] A second cutout portion that communicates the hollow portion and the outside of the peripheral wall portion is formed in a part of the peripheral wall portion of the pipe in a circumferential direction so as to extend in the axial direction of the peripheral wall portion,
The pipe is inserted through the insertion hole of the member to be joined so that the hollow part of the pipe communicates with the outside of the outer insertion part through the second notch part and the first notch part,
At the same time as pressing the peripheral wall portion radially outward by the die, both side end portions of the second notch portion in the peripheral wall portion are connected to the first notch portion in the extrapolated portion of the member to be joined. The pipe according to the preceding item 11 and joined to be bent in a radially outward direction of the peripheral wall portion by a bending convex portion provided in a segment of the die so as to be locked to both end portions in the circumferential direction of the peripheral wall portion. Joining method with member.

[13] A concave strip portion having an opening recessed toward the inside of the peripheral wall portion and opened toward the outside of the peripheral wall portion in a part of the peripheral wall portion of the pipe in the axial direction of the peripheral wall portion. Formed to extend,
The preceding item 10 or 11 wherein the pipe is inserted into the insertion hole of the member to be joined so that the inside of the concave portion of the pipe communicates with the outside of the outer insertion portion through the opening and the first notch. A method of joining the described pipe and a member to be joined.

[14] A protruding portion that protrudes outside the peripheral wall portion is provided on a part of the peripheral wall portion of the pipe in the circumferential direction.
The pipe according to the preceding item 10 or 11, wherein the pipe is inserted into the insertion hole of the member to be joined so that the protruding portion of the pipe passes through the inside of the first notch of the member to be joined in the axial direction. A joining method with a joining member.

  [15] At the same time as pressing the peripheral wall portion radially outward by the die, the inner portion of the first notch portion of the peripheral wall portion is fitted into the first notch portion so that the inner portion is fitted to the first notch portion. The joining method of the pipe and the to-be-joined member of the preceding clause 11 which presses outward in the radial direction of the said peripheral wall part with the convex part for bulging process provided in the segment of this, and makes it bulge.

  [16] The previous items 10 to 15 in which the peripheral wall portion is pressed radially outward in a state where the deformation amount to the outside of the extrapolated portion is regulated by the regulating member disposed outside the extrapolated portion of the member to be joined. A method for joining the pipe according to any one of the above and a member to be joined.

  The present invention has the following effects.

  In this specification, in the state where the member to be joined is joined to the pipe, the joining strength of the member to be welded against the circumferential load of the peripheral wall portion of the pipe is referred to as “torsional strength” of the member to be joined. The bonding strength of the member to be bonded to the axial load is referred to as “removal strength” of the member to be bonded.

  In the invention of [1], since the pipe is inserted into the insertion hole of the member to be joined and the pipe is expanded and the member to be joined is joined and fixed to the pipe, the member to be joined is joined to the pipe by welding. Compared with the method, the members to be joined can be easily joined.

  Furthermore, since the first notch portion is formed extending in the axial direction of the extrapolated portion in a part of the circumferential direction of the extrapolated portion of the joined member, the pipe in the state where the joined member is joined to the pipe. The entire circumferential direction of the outer peripheral surface of the peripheral wall portion is not completely divided in the axial direction, and a part of the peripheral direction of the outer peripheral surface of the peripheral wall portion is axially formed at the first notch portion of the extrapolation portion. It is continuous. Thereby, the inside of the 1st notch part in the surrounding wall part of a pipe can be used effectively. For example, a linear member or a rod-like member (hereinafter referred to as “linear member etc.”) passes through the inside of the first notch in the peripheral wall of the pipe in the axial direction of the peripheral wall. By disposing the linear member or the like, it is possible to prevent the linear member or the like from interfering with the extrapolated portion when the linear member or the like is held in the pipe along the axial direction. Thereby, a linear member etc. can be easily attached and hold | maintained to a pipe, and the length of a linear member etc. can be shortened.

  And since the 1st notch part is formed in the extrapolation part of a to-be-joined member, the weight reduction of a joining structure can be achieved.

  In the invention of [2], since the hollow portion of the pipe communicates with the outside of the extrapolated portion through the second notch portion and the first notch portion, the hollow portion of the pipe can also be used effectively. For example, the hollow portion can be used as an accommodation holding portion for a linear member or the like. Even in this case, the linear member or the like does not interfere with the extrapolated portion when the linear member or the like is accommodated and held from the outside of the extrapolated portion along the axial direction in the hollow portion of the pipe. For this reason, it is possible to easily perform the work of holding the linear member or the like.

  In the invention of [3], both end portions of the first notch portion in the peripheral wall portion of the pipe are locked in the circumferential direction of the peripheral wall portion to both end portions of the first notch portion in the extrapolated portion of the member to be joined. ing. Therefore, the torsional strength of the member to be joined can be improved.

  In the invention of [4], since the closing member that closes the first notch portion is fitted in the first notch portion so as to communicate with the first notch portion and the second notch portion, The rigidity of the member to be joined can be improved, and the torsional strength of the member to be joined can be improved. Furthermore, for example, when a linear member or the like is accommodated and held in the hollow portion of the pipe, it is possible to prevent the linear member or the like from accidentally dropping out of the outer insertion portion.

  In the invention of [5], since the inside of the concave portion of the pipe communicates with the outside of the extrapolated portion through the opening and the first notch portion, the inside of the concave portion of the pipe is also effectively used. For example, the inside of the concave strip portion can be used as an accommodation holding portion for a linear member or the like. Even in this case, the linear member or the like does not interfere with the extrapolated portion when the linear member or the like is accommodated and held in the concave portion of the pipe along the axial direction thereof. For this reason, it is possible to easily perform the work of holding the linear member or the like.

  In the invention of [6], since the closing member that closes the first notch portion is fitted in the first notch portion so as to communicate with the first notch portion and the opening portion, The rigidity of the member can be improved, and the torsional strength of the joined member can be improved. Furthermore, for example, when a linear member or the like is accommodated and held inside the concave portion of the pipe, it is possible to prevent the linear member or the like from accidentally dropping out of the outer insertion portion.

  In the invention of [7], since the protruding portion of the pipe passes through the inside of the first notch of the member to be joined in the axial direction, the torsional strength of the member to be joined can be improved, The protruding portion of the pipe can also be used effectively. For example, the protruding portion can be used as a holding member for a linear member or the like. Even in this case, the linear member or the like does not interfere with the extrapolated portion when the linear member or the like is held by the protruding portion of the pipe along the axial direction thereof. For this reason, it is possible to easily perform the work of holding the linear member or the like.

  In the invention of [8], at least the base portion of the protruding portion of the pipe is fitted into the first notch portion of the member to be joined, so that the torsional strength of the member to be joined can be further improved.

  In the invention of [9], since the partition wall portion for partitioning the hollow portion into a plurality of portions extends in the axial direction of the peripheral wall portion and is integrally formed on the peripheral wall portion of the pipe, the rigidity of the pipe can be improved.

  In the invention [10], the bonded structure according to the invention [1] can be reliably manufactured.

  In the invention of [11], pipe expansion processing can be reliably performed.

  In the invention [12], the joined structure according to the invention [3] can be reliably and easily manufactured.

  In the invention [13], the bonded structure according to the invention [5] can be reliably produced.

  In the invention [14], the bonded structure according to the invention [7] can be reliably manufactured.

  In the invention of [15], the inner wall portion of the first notch portion of the peripheral wall portion of the pipe is the peripheral wall at the convex portion for bulging processing of the die segment so that the inner portion is fitted to the first notch portion. Since the portion is pressed outward in the radial direction, the torsional strength of the member to be joined can be improved. Furthermore, it is possible to reliably and easily manufacture a bonded structure in which the to-be-bonded member has high torsional strength.

  In the invention of [16], the peripheral wall portion is pressed radially outward in a state in which the deformation amount to the outside of the extrapolated portion is regulated by the regulating member, so that the joining strength between the joined member and the pipe is reliably improved. be able to.

FIG. 1 is a perspective view of a steering support beam as a joint structure according to the first embodiment of the present invention. FIG. 2 is a perspective view of the steering support beam viewed from another direction. 3A is a cross-sectional view taken along line XX in FIG. 3B is a vertical cross-sectional view taken along line YY in FIG. FIG. 4 is a perspective view of the steering support beam before the tube is expanded. FIG. 5A is a cross-sectional view of the steering support beam before the tube is expanded. FIG. 5B is a longitudinal cross-sectional view of the steering support beam before the tube is expanded. FIG. 6A is a transverse cross-sectional view showing a state where the support beam body of the steering support beam is expanded. FIG. 6B is a longitudinal sectional view showing a state where the support beam body of the steering support beam is expanded. FIG. 7A is a transverse cross-sectional view showing a state before a support beam body of a steering support beam as a joint structure according to a second embodiment of the present invention is expanded using a regulating member. FIG. 7B is a transverse cross-sectional view showing a state in which the support beam body of the steering support beam is expanded using a regulating member. FIG. 8A is a cross-sectional view of the steering support beam as a joint structure according to the third embodiment of the present invention before the tube is expanded. FIG. 8B is a cross-sectional view showing a state where the support beam body of the steering support beam is expanded. FIG. 9A is a cross-sectional view of the steering support beam as a joint structure according to the fourth embodiment of the present invention in a state before the support beam body is expanded. FIG. 9B is a cross-sectional view showing a state where the support beam body of the steering support beam is expanded. FIG. 10 is a cross-sectional view of a steering support beam as a joint structure according to the fifth embodiment of the present invention. FIG. 11 is a cross-sectional view of a steering support beam as a joint structure according to a sixth embodiment of the present invention. FIG. 12 is a cross-sectional view of a steering support beam as a joint structure according to a seventh embodiment of the present invention. FIG. 13 is a cross-sectional view of a steering support beam as a joint structure according to an eighth embodiment of the present invention. FIG. 14 is a cross-sectional view of a steering support beam as a joint structure according to a ninth embodiment of the present invention. FIG. 15 is a cross-sectional view of a steering support beam as a joint structure according to a tenth embodiment of the present invention. FIG. 16 is a cross-sectional view of a steering support beam as a joint structure according to an eleventh embodiment of the present invention. FIG. 17 is a perspective view of a steering support beam as a joint structure according to a twelfth embodiment of the present invention. FIG. 18A is a transverse cross-sectional view showing a state before a support beam body of a steering support beam serving as a joint structure according to a thirteenth embodiment of the present invention is expanded. FIG. 18B is a cross-sectional view showing a state where the support beam body of the steering support beam is expanded. FIG. 19 is a perspective view of a steering support beam as a joint structure according to a fourteenth embodiment of the present invention. FIG. 20 is a perspective view of a steering support beam as a joint structure according to the fifteenth embodiment of the present invention. It is a transverse cross section of the state where pipe processing was carried out.

  Next, a plurality of embodiments of the present invention will be described below with reference to the drawings.

  1 to 6B are diagrams for explaining a joint structure between a pipe and a member to be joined and a method for joining the pipe and the member to be joined according to the first embodiment of the present invention.

  The joint structure of the first embodiment is a vehicle steering support beam 1A. The steering support beam 1A is disposed between the left and right front pillars of the vehicle body inside the instrument panel at the front of the automobile as a vehicle, and is connected and fixed to both front pillars.

  As shown in FIGS. 1 and 2, the steering support beam 1A includes a support beam main body 10 as a pipe having a hollow portion, and a plurality of mounting brackets 20 as a plurality of members to be joined. That is, in the first embodiment, the support beam main body 10 corresponds to a pipe, the bracket 20 corresponds to a member to be joined, and the steering support beam 1A corresponds to a joint structure.

  The support beam body 10 is formed of a tubular body having a hollow portion 11 having a circular cross section. A plurality of mounting brackets 20 are joined and fixed to the support beam body 10.

  Among these brackets 20, a pair of front pillar mounting brackets 20D and 20D are joined and fixed to both ends of the support beam body 10, and a steering mounting bracket 20C, a pair of mounting center brackets 20B and 20B, and a pair of air. The back unit mounting brackets 20 </ b> A and 20 </ b> A are joined and fixed to predetermined positions in the intermediate portion in the axial direction of the support beam main body 10.

  The support beam body 10 is made of a metal extruded material, and more specifically, is made of a light metal extruded material such as aluminum (including its alloy) or magnesium (including its alloy). The outer diameter of the support beam body 10 is, for example, 100 mm, the thickness is, for example, 4 mm, and the length is, for example, 1000 mm. However, in the present invention, each dimension of the support beam body 10 is not limited to the above values.

  Further, as shown in FIGS. 2 and 3A, the peripheral wall portion 12 of the support beam main body 10 is basically formed in an annular shape in cross section, and the hollow portion 11 is formed in a part of the circumferential direction of the peripheral wall portion 12. A strip-shaped notch 13 that communicates with the outside of the peripheral wall 12 is formed to extend straight in the axial direction of the peripheral wall 12 over the entire length region of the peripheral wall 12. The peripheral wall 12 is divided in the circumferential direction by the notch 13, and as a result, the cross-sectional shape of the peripheral wall 12 is formed in a C shape. The width of the notch 13 is set, for example, in a range of 10 to 50 mm, and specifically 20 mm.

  Hereinafter, the notch 13 is referred to as a “second notch 13” in order to match the description of the claims.

  As shown in FIGS. 3A and 3B, the hollow portion 11 of the support beam main body 10 is for housing and holding a harness (wire harness) 30 of an in-vehicle component, that is, used as a harness holding and holding portion. . In the first embodiment, the harness 30 corresponds to a linear member as a member to be held that is held by the support beam main body 10.

  Each bracket 20 is made of metal, and more specifically, is made of a light metal such as aluminum or magnesium or a light metal extruded material.

  The structure of these brackets 20 will be described below with the airbag unit mounting bracket 20 (20A) as a representative.

  The bracket 20 is made of a light metal extruded material, and has an extrapolated portion 22 that is extrapolated to the support beam main body 10 and a plate-like projecting portion 24 that projects outward from the outer peripheral surface of the extrapolated portion 22. . The outer insertion portion 22 is provided with an insertion hole 21 through which the support beam main body 10 is inserted so as to penetrate in the axial direction of the outer insertion portion 20. The inner diameter of the outer insertion portion 22 (that is, the diameter of the insertion hole 21) is set to be slightly larger than the diameter of the support beam main body 10 before tube expansion processing, for example, about 1 mm larger than the diameter of the support beam main body 10. Yes. The thickness of the extrapolation portion 22 is, for example, 10 mm, and the axial length of the extrapolation portion 22 is, for example, 40 mm. However, in this invention, each dimension of the extrapolation part 22 is not limited to said value.

  Furthermore, the outer insertion portion 22 of the bracket 20 is basically formed in an annular shape in cross section, and the insertion hole 21 and the outer side of the outer insertion portion 22 are formed in a part of the outer insertion portion 22 in the circumferential direction. The strip-shaped notch portion 23 that communicates is formed so as to extend straight in the axial direction of the outer insertion portion 22 over the entire length region of the outer insertion portion 22. The outer insertion portion 22 is divided in the circumferential direction by the cutout portion 23, and as a result, the cross-sectional shape of the outer insertion portion 22 is formed in a C shape. The width of the notch 23 is set to a range of 10 to 50 mm, for example, and specifically set to 20 mm. In the present invention, the width of the notch 23 may be smaller or larger than the width of the second notch 13, or may be the same.

  Hereinafter, the notch 23 is referred to as a “first notch 23” in order to match the description in the claims.

  Similar to the extrapolated portion 22 of the bracket 20, an extrapolated portion 22 of another bracket 20 is configured.

  According to the steering support beam 1A of the first embodiment, as shown in FIGS. 3A and 3B, the support beam main body 10 has a bracket 11 through which the hollow portion 11 passes through the second notch portion 13 and the first notch portion 23. 20 is inserted through the insertion hole 21 of the bracket 20 so as to communicate with the outside of the outer insertion portion 22. In this state, the insertion portion 12d into the insertion hole 21 of the peripheral wall portion 12 of the support beam main body 10 and the axially adjacent portions 12e and 12de are expanded (see expansion processing) (see FIG. 3B). Thus, the bracket 20 is bonded and fixed to the support beam main body 10. Moreover, the mutual position of the 2nd notch part 13 and the 1st notch part 23 in the circumferential direction of the surrounding wall part 12 of the support beam main body 10 corresponds (refer FIG. 3A).

  Note that a portion formed by the insertion portion 12d of the support beam main body 10 and the axially both side vicinity portions 12e and 12e is a “pipe expansion processing scheduled portion” of the peripheral wall portion 12 of the support beam main body 10.

  Thus, in a state where the bracket 20 is bonded and fixed to the support beam main body 10, the insertion portion 12d of the support beam main body 10 is locally plastically deformed so as to bulge outward by tube expansion processing. Further, the adjacent portions 12e and 12e are locally plastically deformed so as to bulge outward by tube expansion processing. Therefore, both the portions 12e and 12e are respectively in the circumferential direction of the peripheral wall portion 12. A continuous bulging portion B having a circular arc shape is formed locally. Both the bulging portions B and B are for preventing the joining position of the bracket 20 to the support beam main body 10 from being accidentally shifted in the axial direction of the peripheral wall portion 12 of the support beam main body 10. B and B improve the pull-out strength of the bracket 20.

  Furthermore, a harness 30 as an in-vehicle component is accommodated and held in the hollow portion 11 of the support beam main body 10 along the axial direction of the peripheral wall portion 12 of the support beam main body 10.

  Next, a method for manufacturing the steering support beam 1A according to the first embodiment (that is, a method for joining a pipe and a member to be joined) will be described below.

  As shown in FIG. 4, the support beam main body 10 and the brackets 20 are prepared.

  Further, as shown in FIGS. 4 to 5B, a tube expansion processing device 40 is prepared for expanding the peripheral wall portion 12 of the support beam main body 10 (specifically, each tube expansion scheduled portion 12d, 12e, 12e of the peripheral wall portion 12). . The pipe expansion processing device 40 is also referred to as an expansion processing device.

  The pipe expansion processing device 40 includes a die 41 and a mandrel 45 as shown in FIG. The die 41 is provided with a wedge hole 43 extending in the axial direction at the center thereof, and is divided into a plurality of segments 42 in the circumferential direction around the wedge hole 43. A pair of pressing projections 44, 44 that are spaced apart from each other in the axial direction are provided over the entire circumference in the circumferential direction at positions corresponding to the joining positions of the brackets 20 on the outer peripheral surface of the die 41. The pressing convex portion 44 locally forms a bulging portion B continuous in the circumferential direction at a predetermined portion 12e of the peripheral wall portion 12 of the support beam main body 10, and the cross-sectional shape thereof is an arc shape. A wedge 46 corresponding to the wedge hole 43 is formed at the tip of the mandrel 45 (see FIG. 5B). The wedge part 46 is tapered, and its cross-sectional shape is circular. In the present invention, the cross-sectional shape of the wedge portion 46 and the wedge hole portion 43 is not limited to a circular shape, but may be, for example, a polygonal shape.

  Next, as shown in FIG. 4, each of the support beam main bodies 10 is communicated to the outside of each extrapolation portion 22 through the second cutout portion 13 and the first cutout portions 23. It passes through the insertion hole 21 of the bracket 20.

  Thereafter, the tube expansion processing device 40 simultaneously expands the portions corresponding to the brackets of the support beam main body 10 (that is, the respective expansion expansion scheduled portions 12d, 12e, 12e) simultaneously. This pipe expansion process is performed as follows.

  The die 41 is inserted and arranged in the hollow portion 11 of the support beam body 10 in the axial direction. Then, as shown in FIGS. 5A and 5B, each segment 42 of the die 41 is forcedly inserted into the wedge hole portion 43 of the die 41 by forcibly inserting the wedge portion 46 of the mandrel 45 by a mandrel driving device (not shown). Move outward in the radius direction. As a result, as shown in FIGS. 6A and 6B, each segment 42 simultaneously presses each insertion portion 12d of the peripheral wall portion 12 of the support beam main body 10 and its adjacent portions 12e and 12e on both sides in the radial direction at the same time. Then, these portions 12d, 12e, and 12e are plastically deformed and expanded. As a result, the extrapolated portion 22 of each bracket 20 is pressed against the outer peripheral surface of the peripheral wall portion 12 of the support beam main body 10, and each bracket 20 is joined and fixed to the support beam main body 10.

  Next, the wedge portion 46 of the mandrel 45 is extracted from the wedge hole portion 43 of the die 41, and the die 41 is extracted from the hollow portion 11 of the support beam body 10.

  Thereafter, the harness 30 is accommodated and held in the hollow portion 11 of the support beam main body 10 along the axial direction through the first notch portion 23 and the second notch portion 13 from the outside of each outer insertion portion 22.

  Through the above steps, the steering support beam 1A shown in FIGS. 1 to 3B is obtained.

  The steering support beam A and the manufacturing method thereof according to the first embodiment have the following advantages.

  Since the support beam main body 10 is inserted into the insertion hole 21 of the outer insertion portion 22 of each bracket 20 and the support beam main body 10 is subjected to tube expansion processing, each bracket 20 is bonded and fixed to the support beam main body 10. Compared with the method of joining the bracket 20 to the support beam main body 10 by welding, the bracket 20 can be joined easily. Moreover, since each bracket 20 is joined to the support beam body 10 at a time, each bracket 20 can be joined more easily.

  Further, the hollow portion 11 of the support beam main body 10 is a member that accommodates and holds the harness 30 (that is, the harness accommodating and holding portion), and the hollow portion 11 of the support beam main body 10 is connected to the second notch portion 13 and each first cut. It communicates with the outside of each extrapolation portion 22 through the notch portion 23. Therefore, the harness 30 can be accommodated and held in the hollow portion 11 of the support beam main body 10 through the first notch portion 23 and the second notch portion 13 from the outside of each outer insertion portion 22. That is, when the harness 30 is accommodated and held in the hollow portion 11 of the support beam body 10, the harness 30 does not interfere with each extrapolated portion 22. Therefore, the holding work of the harness 30 can be easily performed, and the length of the harness 30 necessary for holding the harness 30 on the support beam main body 10 can be shortened.

  Moreover, since the harness 30 is accommodated and held in the hollow portion 11 of the support beam main body 10, the space for the steering support beam 1A can be saved.

  Furthermore, since the first notch portion 23 is formed in a part of the extrapolation portion 22 of the bracket 20, the weight of the steering support beam 1A can be reduced. In addition, since the second notch portion 13 is formed in a part of the peripheral wall portion 12 of the support beam main body 10, the steering support beam 1A can be further reduced in weight.

  Hereinafter, a plurality of embodiments (modifications) obtained by modifying the first embodiment will be described with reference to FIGS. In these drawings, the same reference numerals are given to the same elements as those of the steering support beam 1A and the tube expansion processing device 40 of the first embodiment. Each embodiment will be described below with a focus on differences from the first embodiment.

  7A and 7B are views for explaining a method of manufacturing the steering support beam 1B according to the second embodiment of the present invention.

  In the second embodiment, the tube expansion processing device 40 includes a die 41, a mandrel 45, and a regulating member 47. This restricting member 47 restricts the amount of deformation of the outer insertion portion 22 to the outside so that the outer insertion portion 22 of the bracket 20 does not plastically deform outward during tube expansion processing, and is divided into an upper member 47a and a lower member 47b. A through hole 48 in which the bracket 20 is disposed is formed between the upper and lower members 47a and 47b.

  In the manufacturing method of the steering support beam 1A of the second embodiment, the tube expansion processing of the support beam main body 10 is performed as follows.

  As shown in FIG. 7A, by arranging the bracket 20 in the through hole 48 of the regulating member 47, the regulating member 47 is arranged so as to surround the outer insertion portion 22 outside the outer insertion portion 22 of the bracket 20. Thereby, the deformation amount to the outside of the extrapolation part 22 is regulated by the regulating member 47. In this state, the peripheral wall portion 12 of the support beam body 10 is pressed radially outward by each segment 42 of the die 41. Then, in a state where the deformation amount to the outside of the extrapolated portion 22 is regulated by the regulating member 47, the peripheral wall portion 12 is expanded, and the bracket 20 is bonded and fixed to the support beam main body 10. Thereafter, the wedge portion 46 of the mandrel 45 is extracted from the wedge hole portion 43 of the die 41, the die 41 is extracted from the hollow portion 11 of the support beam main body 10, and the support beam main body 10 is further extracted from the through hole 48 of the restriction member 47. And the bracket 20 is taken out.

  In this bracket 20, since the outer insertion portion 22 is divided in the circumferential direction by the first notch portion 23, the outer insertion portion 22 is easily plastically deformed outward during tube expansion processing. If the extrapolated portion 22 is plastically deformed outward, there is a drawback in that the bonding strength between the bracket 20 and the support beam body 10 is reduced.

  On the other hand, in the second embodiment, the peripheral wall portion 12 of the support beam main body 10 is pressed outward in the radial direction in a state where the deformation amount to the outside of the extrapolated portion 22 of the bracket 20 is regulated by the regulating member 47. Therefore, even when the outer insertion portion 22 is divided in the circumferential direction by the first notch portion 23, plastic deformation of the outer insertion portion 22 is prevented. Thereby, the joining strength with the support beam main body 10 of the bracket 20 can be improved reliably.

  8A and 8B are views for explaining a steering support beam 1C and a method for manufacturing the same according to a third embodiment of the present invention.

  In the third embodiment, as shown in FIG. 8A, the width of the second cutout portion 13 of the peripheral wall portion 12 of the support beam body 10 is larger than the width of the first cutout portion 23 of the extrapolation portion 22 of the bracket 20. Also set a little smaller. The support beam body 10 is connected to the insertion hole 21 of the bracket 20 so that the hollow portion 11 of the support beam body 10 communicates with the outside of the outer insertion portion 22 through the second notch portion 13 and the first notch portion 23. It is inserted. In this state, both side end portions 12 a and 12 a of the second notch portion 13 in the peripheral wall portion 12 of the support beam main body 10 are opposite to both end portions 22 a and 22 a of the first notch portion 23 in the extrapolation portion 22 of the bracket 20. It protrudes to the inside of the first notch 23 with respect to the position. As shown in FIG. 8B, in this state, the peripheral wall portion 12 of the support beam main body 10 is expanded by the tube expansion processing device 40, and the bracket 20 is joined and fixed to the support beam main body 10. Further, the peripheral wall portion 12 The both side end portions 12a, 12a are bent outward in the radial direction of the peripheral wall portion 12, so that the both side end portions 12a, 12a become both side end portions 22a, 22a of the extrapolation portion 22 (more specifically, the side end portions 22a, 22a The end wall is locked in the circumferential direction of the peripheral wall portion 12.

  Of the plurality of (four in this embodiment) segments 42 of the die 41 of the pipe expansion processing device 40, the pressing surface of the segment 42 corresponding to the second notch 13 is bent in the axial direction of the die 41. A processing convex portion 42a is formed.

  In the manufacturing method of the steering support beam 1C of the third embodiment, the tube expansion processing of the support beam main body 10 is performed as follows.

  At the same time that the peripheral wall portion 12 of the support beam body 10 is pressed radially outward by each segment 42 of the die 41, both side end portions 12a, 12a of the second notch portion 13 in the peripheral wall portion 12 are peripheral walls by bending convex portions 42a. The both end portions 12a, 12a are pushed and bent outward in the radial direction of the portion 12, and the circumferential direction of the peripheral wall portion 12 is turned to both end portions 22a, 22a of the extrapolation portion 22 (more specifically, end surfaces of both end portions 22a, 22a). Lock to. That is, by performing the pipe expanding process on the peripheral wall part 12 of the support beam main body 10, the bending of the both side end portions 12 a and 12 a of the second notch part 13 in the peripheral wall part 12 is performed simultaneously with the pipe expanding process. Therefore, the steering support beam 1C can be reliably and easily manufactured.

  In the third embodiment, both end portions 12 a and 12 a of the peripheral wall portion 12 of the support beam main body 10 are locked to both end portions 22 a and 22 a of the outer insertion portion 22 of the bracket 20 in the circumferential direction of the peripheral wall portion 12. Yes. Therefore, the torsional strength of the bracket 20 can be improved.

  9A and 9B are views for explaining a steering support beam 1D and a manufacturing method thereof according to the fourth embodiment of the present invention.

  In the fourth embodiment, as in the third embodiment, as shown in FIG. 9A, both end portions 12 a and 12 a of the second notch portion 13 in the peripheral wall portion 12 of the support beam main body 10 are It protrudes to the inside of the first cutout portion 23 with respect to the positions of both end portions 22a, 22a of the first cutout portion 23 in the extrapolation portion 22. Then, as shown in FIG. 9B, the both side end portions 12a, 12a are bent outward in the radial direction of the peripheral wall portion 12, and the both side end portions 12a, 12a are both side end portions 22a, 22a of the extrapolation portion 22 (details). Then, it is latched in the circumferential direction of the peripheral wall portion 12 at the corner portions of the side end portions 22a and 22a).

  Of the plurality of (four in this embodiment) segments 42 of the die 41 of the tube expansion processing device 40, the pressing surface of the segment 42 corresponding to the first notch 23 is bent in the axial direction of the die 41. A processing convex portion 42a is formed. The protruding amount of the bending convex portion 42a is set smaller than the protruding amount of the bending convex portion 42a of the fourth embodiment.

  In the manufacturing method of the steering support beam 1D of the fourth embodiment, the tube expansion processing of the support beam main body 10 is performed in the same manner as in the third embodiment.

  In the fourth embodiment, both end portions 12 a and 12 a of the second notch portion 13 in the peripheral wall portion 12 of the support beam body 10 are engaged with both end portions 22 a and 22 a of the outer insertion portion 22 in the circumferential direction of the peripheral wall portion 12. It has been stopped. Therefore, the torsional strength of the bracket 20 can be improved.

  FIG. 10 is a diagram illustrating a steering support beam 1E according to the fifth embodiment of the present invention.

  In the fifth embodiment, similarly to the third embodiment, the width of the second cutout portion 13 of the peripheral wall portion 12 of the support beam main body 10 is the same as that of the first cutout portion 23 of the extrapolation portion 22 of the bracket 20. It is set a little smaller than the width. The support beam body 10 is connected to the insertion hole 21 of the bracket 20 so that the hollow portion 11 of the support beam body 10 communicates with the outside of the outer insertion portion 22 through the second notch portion 13 and the first notch portion 23. It is inserted. In this state, both side end portions 12a, 12a of the second notch portion 13 in the peripheral wall portion 12 of the support beam body 10 are connected to both side end portions 22a, 22a of the first notch portion 23 in the extrapolation portion 22 of the bracket 20. It protrudes to the inside of the first notch 23 with respect to the position. The peripheral wall 12 of the support beam main body 10 is expanded and the bracket 20 is bonded and fixed to the support beam main body 10. In addition, the both side edge parts 12a and 12a of the surrounding wall part 12 are not bent so that it may be latched by the both side edge parts 22a and 22a of the extrapolation part 22. FIG. Further, the harness 30 is accommodated and held in the hollow portion 11 of the support beam main body 10.

  FIG. 11 is a view for explaining 1F of the steering support beam according to the sixth embodiment of the present invention.

  In the sixth embodiment, the partition wall portion 14 that partitions the hollow portion 11 into two pieces is formed integrally with the peripheral wall portion 12 of the support beam main body 10 so as to extend in the axial direction of the peripheral wall portion 12. And the harness 30 is accommodated and hold | maintained at one side (2nd notch part 13 side) of the hollow part 11 divided into two. Other configurations of the steering support beam 1F are the same as those of the steering support beam 1E of the fifth embodiment.

  FIG. 12 is a diagram illustrating a steering support beam 1G according to the seventh embodiment of the present invention.

  In the seventh embodiment, a closing member 26 that closes the first cutout portion 23 is formed in the first cutout portion 23 of the extrapolation portion 22 of the bracket 20, and the peripheral wall of the first cutout portion 23 and the support beam main body 10. The second notch portion 13 of the portion 12 is press-fitted and fitted in a state communicating from the outside of the outer insertion portion 22. The closing member 26 is made of a metal extruded material, and more specifically, a light metal extruded material. The length of the blocking member 26 in the axial direction is substantially the same as the length of the outer insertion portion 22 in the axial direction. The cross-sectional shape of the closing member 26 is formed in a tapered shape, specifically, a substantially trapezoidal shape or a substantially triangular shape.

  In the manufacturing method of the steering support beam 1G of the seventh embodiment, the support beam main body 10 is expanded as in the first embodiment, and then the harness 30 is accommodated and held in the hollow portion 11 of the support beam main body 10. Next, the closing member 26 is communicated with the first notch portion 23 and the second notch portion 13 by using a press fitting tool such as a hammer from the outside of the outer insertion portion 22 to the first notch portion 23. Press fit into. Thereafter, in order to prevent the closing member 26 from being inadvertently pulled out from the first cutout portion 23, the closing member 26 is fixed to the outer insertion portion 22 by welding or the like as necessary.

  In the seventh embodiment, since the closing member 26 is fitted in the first cutout portion 23 in a state of communicating with the first cutout portion 23 and the second cutout portion 13, The rigidity of the bracket 20 can be improved, the torsional strength of the bracket 20 can be improved, and the harness 30 accommodated in the hollow portion 11 of the support beam body 10 is accidentally dropped to the outside of the extrapolation portion 22. Can be prevented.

  FIG. 13 is a view for explaining a steering support beam 1H according to the eighth embodiment of the present invention.

  In the eighth embodiment, a concave strip 16 having an opening 17 that is recessed toward the inside of the peripheral wall 12 and opened toward the outside of the peripheral wall 12 at a part of the peripheral wall 12 of the support beam body 10 in the circumferential direction. However, it is formed to extend straight in the axial direction of the peripheral wall portion 12 over the entire length region of the peripheral wall portion 12. The inside of the concave portion 16 is for accommodating and holding the harness 30, that is, used as a harness holding and holding portion.

  The configuration of the bracket 20 is the same as that of the first embodiment, that is, the first cutting that communicates the insertion hole 21 and the outside of the outer insertion portion 22 with a part of the outer insertion portion 22 of the bracket 20 in the circumferential direction. A notch portion 23 is formed.

  In the manufacturing method of the steering support beam 1H according to the eighth embodiment, the support beam main body 10 communicates with the outside of the extrapolation portion 22 through the opening 17 and the first cutout portion 23 in the recess 16. In this way, it is inserted through the insertion hole 21 of the bracket 20. Thereafter, the peripheral wall portion 12 of the support beam main body 10 is expanded by a tube expansion processing device (not shown), whereby the bracket 20 is joined and fixed to the support beam main body 10. Next, the harness 30 is accommodated and held in the concave portion 16 from the outside of the extrapolated portion 22 through the first cutout portion 23 and the opening portion 17.

  In the eighth embodiment, the support beam main body 10 is inserted into the insertion hole 21 of the bracket 20, and the support beam main body 10 is expanded and the bracket 20 is joined and fixed to the support beam main body 10. Compared to the method of joining the support beam body 10 by welding, the bracket 20 can be joined easily.

  Further, the inside of the recessed strip portion 16 of the support beam main body 10 is a portion in which the harness 30 is accommodated and held (that is, the harness accommodating / holding portion). Since it communicates with the outer side of the outer insertion part 22 through the first notch part 23, the harness 30 is recessed from the outer side of the outer insertion part 22 through the first notch part 23 and the opening part 17. 16 can be housed and held inside. In other words, the harness 30 does not interfere with the extrapolated portion 22 when the harness 30 is accommodated and held in the concave portion 16 of the support beam main body 10. Therefore, the holding work of the harness 30 can be easily performed.

  In addition, since the harness 30 is housed and held inside the recessed strip portion 16 of the support beam main body 10, space saving of the steering support beam 1H can be achieved.

  Furthermore, although not shown in the present invention, the steering support beam 1H of the eighth embodiment is similar to the seventh embodiment shown in FIG. A closing member (not shown) that closes the notch 23 may be communicated with and fitted to the first notch 23 and the opening 17. In this case, the rigidity of the support beam main body 10 and the bracket 20 can be improved, the torsional strength of the bracket 20 can be improved, and the support beam main body 10 is accommodated in the concave portion 16. It is possible to prevent the harness 30 from inadvertently dropping out of the outer insertion portion 22.

  Furthermore, although not shown in the present invention, the steering support beam 1H of the eighth embodiment is provided with the hollow portion 11 in the peripheral wall portion 12 of the support beam main body 10 in the same manner as the sixth embodiment shown in FIG. A plurality of partition walls (not shown) may be integrally formed extending in the axial direction of the peripheral wall 12. In this case, the rigidity of the support beam main body 10 can be improved.

  FIG. 14 is a view for explaining a steering support beam 1I according to the ninth embodiment of the present invention.

  In the ninth embodiment, a protrusion 18 having a substantially U-shaped cross section protruding outward from the peripheral wall 12 is formed on a part of the peripheral wall 12 of the support beam body 10 in the circumferential direction. The region extends integrally in the axial direction of the peripheral wall portion 12 over the region. Further, a harness holding portion 19 having a substantially L-shaped or substantially U-shaped cross section for holding the harness 30 extends over the entire length region of the protruding portion 18 at the leading end portion of the protruding portion 18 in the protruding direction. It is integrally formed.

  The configuration of the bracket 20 is the same as that of the first embodiment, that is, the first cutting that communicates the insertion hole 21 and the outside of the outer insertion portion 22 with a part of the outer insertion portion 22 of the bracket 20 in the circumferential direction. A notch portion 23 is formed.

  In the manufacturing method of the steering support beam 1I according to the ninth embodiment, the support beam main body 10 is formed so that the protruding portion 18 passes the inside of the first notch portion 23 of the bracket 20 in the axial direction and the protruding portion. 18 is inserted into the insertion hole 21 of the bracket 20 so that the harness holding portion 19 at the tip end portion protrudes to the outside of the outer insertion portion 22 through the first cutout portion 23. Thereafter, the peripheral wall portion 12 of the support beam main body 10 is expanded by a tube expansion processing device (not shown), whereby the bracket 20 is joined and fixed to the support beam main body 10. Next, the harness 30 is received and held by the harness holding portion 19.

  In the ninth embodiment, the support beam body 10 is inserted into the insertion hole 21 of the outer insertion portion 22 of the bracket 20, the support beam body 10 is expanded, and the bracket 20 is joined and fixed to the support beam body 10. Therefore, the bracket 20 can be easily joined as compared with the method of joining the bracket 20 to the support beam main body 10 by welding.

  Further, the ridge portion 18 of the support beam main body 10 has a harness holding portion 19, and the ridge portion 18 of the support beam main body 10 passes through the inside of the first notch portion 23 of the bracket 20 in the axial direction. Therefore, the harness 30 does not interfere with the extrapolation portion 22 when the harness 30 is held by the harness holding portion 19 of the support beam main body 10. Therefore, the harness 30 can be easily held by the harness holding portion 19 of the support beam main body 10, that is, the harness 30 can be easily held.

  FIG. 15 is a view for explaining a steering support beam 1J according to the tenth embodiment of the present invention.

  In the tenth embodiment, both end portions 22a, 22a of the first notch portion 23 in the extrapolation portion 22 of the bracket 20 sandwich the base portion 18a of the ridge portion 18 of the support beam body 10 from opposite sides. The base 18 a of the protrusion 18 of the support beam main body 10 is fitted into the first notch 23 of the bracket 20. Further, a wall portion 12 f constituting a part of the peripheral wall portion 12 is formed on the peripheral wall portion 12 side of the base portion 18 a of the protruding portion 18. Other configurations of the steering support beam 1J are the same as those of the steering support beam 1I of the ninth embodiment.

  In the tenth embodiment, since the base portion 18a of the ridge portion 18 of the support beam main body 10 is fitted into the first notch portion 23 of the bracket 20, the torsional strength of the bracket 20 can be further improved.

  FIG. 16 is a view for explaining the steering support beam 1K according to the eleventh embodiment of the present invention.

  In the eleventh embodiment, the peripheral wall portion 12 of the support beam main body 10 is basically formed in a polygonal annular shape in cross section, more specifically, in a quadrangular annular shape in cross section. A ridge portion 18 having a substantially U-shaped cross-section projecting outward from the peripheral wall portion 12 in a part of the direction is integrally formed extending straight in the axial direction of the peripheral wall portion 12 over the entire length region of the peripheral wall portion 12. ing. Further, a harness holding portion 19 is integrally formed over the entire length region of the ridge portion 18 at the distal end portion of the ridge portion 18 in the protruding direction.

  The extrapolation portion 22 of the bracket 20 is basically formed in a polygonal cross section in cross section, and more specifically, formed in a quadrangular cross section in cross section. A notch 23 is formed. The extrapolated portion 22 is divided in the circumferential direction by the second cutout portion 23, and as a result, the cross-sectional shape of the extrapolated portion 22 is formed in a C shape.

  The protrusions of the support beam main body 10 with both end portions 22a, 22a of the first notch 23 in the extrapolation portion 22 of the bracket 20 sandwiching the base portions 18a of the protrusions 18 of the support beam main body 10 from opposite sides. The base portion 18 a of the strip portion 18 is fitted into the first cutout portion 23 of the bracket 20.

  Other configurations of the steering support beam 1K are the same as those of the steering support beam 1I of the ninth embodiment.

  In the eleventh embodiment, the peripheral wall portion 12 of the support beam main body 10 is basically formed in a polygonal cross section in cross section, and the extrapolation portion 22 of the bracket 20 also corresponds to the peripheral wall portion 12 in a polygonal cross section. Is formed. Since the support beam main body 10 is inserted through the insertion hole 21 of the bracket 20, the torsional strength of the bracket 20 can be further improved.

  In the present invention, although not shown, the steering support beams 1H, 1J, and 1K according to the ninth to eleventh embodiments are not projected from the base portion 18a of the protrusion portion 18 of the support beam main body 10, but the protruding direction of the protrusion portion 18. May be fitted in the first cutout 23.

  In the ninth to eleventh embodiments, the harness holding portion 19 of the ridge portion 18 of the port beam body 10 receives and holds the harness 30 from below. In the present invention, the harness holding portion 19 is the same. It is not limited to, For example, you may latch and hold the harness 30, for example.

  FIG. 17 is a view for explaining a steering support beam 1L according to the twelfth embodiment of the present invention.

  In the twelfth embodiment, the steering support beam 1L is the same as the steering support beam 1A of the first embodiment, except that the cross-sectional shape of the protrusion 24 of the airbag unit mounting bracket 20A is substantially triangular. It is. Thus, in this invention, the shape of the protrusion part 24 of the bracket 20 is variously changed according to the vehicle-mounted components attached to the bracket 20. FIG.

  18A and 18B are views for explaining a steering support beam 1M and a manufacturing method thereof according to a thirteenth embodiment of the present invention.

  In the thirteenth embodiment, the peripheral wall portion 12 of the support beam main body 10 is not provided with the second notch portion. Therefore, as shown in FIG. 18A, the transverse cross-sectional shape of the peripheral wall portion 12 is the circumferential direction thereof. It is formed in an annular shape that is continuous over the entire circumference. 18B, the peripheral wall portion 12 of the support beam main body 10 is expanded by the tube expansion processing device 40, and the bracket 20 is joined and fixed to the support beam main body 10. Further, the first cutting in the peripheral wall portion 12 is performed. An inner portion 12 g of the notch 23 bulges outside the peripheral wall 12 so as to fit into the first notch 23.

  Of the plurality of segments 42 of the die 41 of the tube expansion processing device 40, a bulging convex portion 42 b extending in the axial direction of the die 41 is formed on the pressing surface of the segment 42 corresponding to the first notch 23. Has been.

  In the method of manufacturing the steering support beam 1M according to the thirteenth embodiment, the tube expansion of the support beam main body 10 is performed as follows.

  The peripheral wall portion 12 of the support beam main body 10 is pressed radially outward by the segments 42 of the die 41, and at the same time, the inner wall portion 12g of the first cutout portion 23 in the peripheral wall portion 12 is bulged by the convex portion 42b. Is pressed outward in the radial direction so as to bulge to the outside of the peripheral wall portion 12, whereby the inner portion 12 g is fitted into the first cutout portion 23. That is, by performing tube expansion processing of the peripheral wall portion 12 of the support beam main body 10, the bulging processing of the inner portion 12g of the first notch portion 23 in the peripheral wall portion 12 is performed simultaneously with the tube expansion processing. Therefore, the steering support beam 1M can be reliably and easily manufactured.

  Furthermore, since the inner portion 12g of the first cutout portion 23 in the peripheral wall portion 12 of the support beam body 10 is fitted into the first cutout portion 23, the torsional strength of the bracket 20 can be improved.

  In the first to thirteenth embodiments, the member to be held held by the support beam main body 10 is the harness 30. However, in the present invention, the member to be held is not limited to the harness 30 and may be other linear members. It may be a rod-shaped member. Further, in the present invention, the held member may be the support member 31 as in the thirteenth and fourteenth embodiments shown below, or may be another member.

  FIG. 19 is a view for explaining a steering support beam 1N according to the fourteenth embodiment of the present invention.

  In the fourteenth embodiment, the second notch portion is not provided in the peripheral wall portion 12 of the support beam main body 10, and therefore, the cross-sectional shape of the peripheral wall portion 12 is continuous over the entire circumference in the circumferential direction. It is formed in an annular shape.

  Further, in the state where the bracket 20 is joined to the support beam main body 10, the entire circumferential direction of the outer peripheral surface of the peripheral wall portion 12 of the support beam main body 10 is not completely divided in the axial direction. A part of the outer circumferential surface in the circumferential direction is continuous in the axial direction at the first notch portion 23 of the extrapolation portion 22.

  In this steering support beam 1N, both legs of the U-shaped support member 31 are formed on the inner portions 12g and 12g of the first notches 23 and 23 of the two brackets 20 and 20 on the peripheral wall portion 12 of the support beam main body 10. The part is fixedly held by a bolt. On-vehicle components are attached to and supported by the support member 31. The support member 31 is attached to the support beam main body 10 after the tube expansion processing of the support beam main body 10.

  According to the steering support beam 1N, the support member 31 does not interfere with the extrapolation portion 22 when the support member 31 is attached to the support beam main body 10. Therefore, the work of attaching and holding the support member 31 to the support beam main body 10 can be easily performed.

  FIG. 20 is a view for explaining a steering support beam 1P according to the fifteenth embodiment of the present invention.

  In the fifteenth embodiment, a protrusion 18 having a substantially U-shaped cross section protruding outward from the peripheral wall 12 is formed on a part of the peripheral wall 12 of the support beam body 10 in the circumferential direction. The region extends integrally in the axial direction of the peripheral wall portion 12 over the region. And this protrusion 18 has passed the inner side of the 1st notch part 23 of each bracket 20 to an axial direction, and also is the front-end | tip part from the base 18a of the protrusion 18 in the protrusion direction of the protrusion 18. The entire region up to is fitted in the first cutout portion 23.

  In this steering support beam 1P, both leg portions of the U-shaped frame-shaped support member 31 are fixedly held by bolts at the distal end portion (more specifically, the distal end surface) of the ridge portion 18 of the support beam main body 10. The support member 31 is attached to the support beam body 10 before or after the support beam body 10 is expanded.

  According to the steering support beam 1P, when the support member 31 is attached to the support beam body 10 after the tube expansion of the support beam body 10, the support member 31 is attached to the support beam body 10 at the time of attachment. The support member 31 does not interfere with the extrapolation portion 22. Therefore, the work of attaching and holding the support member 31 to the support beam main body 10 can be easily performed.

  Although a plurality of embodiments of the present invention have been described above, the present invention is not limited to what is shown in these embodiments. For example, the present invention may be a combination of a plurality of technical ideas from the technical ideas applied to these embodiments.

  In the present invention, the support beam main body 10 and the bracket 20 may be made of the same material or different materials.

  Further, in the present invention, as shown in these embodiments, a plurality of brackets 20 may be joined and fixed to the support beam body 10 at once, or the brackets 20 may be joined to the support beam body 10 one by one. good.

  Further, in the present invention, as shown in these embodiments, all of the plurality of brackets 20 may be ones in which the first notch portion 23 is formed in the outer insertion portion 22, or a plurality of brackets 20 may be formed. At least one of the brackets 20 may be one in which the first notch portion 23 is formed in the outer insertion portion 22.

  Moreover, although these embodiment showed as a suitable example the case where a pipe is the support beam main body 10, a to-be-joined member is the bracket 20, and a joining structure is the steering support beams 1A-1P, this invention is such a case. However, the present invention is not limited to this, and can be applied to various joint structures manufactured by joining a member to be joined to a pipe.

  Moreover, these embodiment showed the suitable example which utilizes effectively the inner side of the 1st notch part in the surrounding wall part of a pipe, and this invention is not necessarily limited to these suitable examples.

  INDUSTRIAL APPLICABILITY The present invention can be used for a joined structure and a joining method of a pipe and a member to be joined.

1A to 1L: Steering support beam (joint structure)
10: Support beam body (pipe)
11: Hollow part 12: Peripheral wall part 13: Second notch part 14: Partition part 16: Recess part 17: Opening part 18: Projection part 18a: Base part 19: Harness holding part 20: Mounting bracket (joined member) )
21: Insertion hole 22: Extrapolation part 23: 1st notch part 26: Closure member 30: Harness (linear member)
31: Support member 40: Tube expansion processing device 41: Die 42: Segment 42a: Bending convex portion 42b: Swelling convex portion 45: Mandrel 47: Restricting member

Claims (16)

A pipe having a hollow portion;
A first cutout portion that has an insertion portion provided with an insertion hole through which the pipe is inserted, and that communicates the front insertion hole and the outside of the insertion portion with a part of the outer insertion portion in the circumferential direction. A joined member formed extending in the axial direction of the extrapolated portion,
The pipe is inserted through the insertion hole of the member to be joined,
A pipe-to-join member joined structure, wherein the pipe is expanded and the joined member is joined and fixed to the pipe. A second cutout portion that communicates the hollow portion and the outside of the peripheral wall portion is formed in a part of the peripheral wall portion of the pipe in an axial direction, extending in the axial direction of the peripheral wall portion,
The pipe is inserted into the insertion hole of the member to be joined so that the hollow portion of the pipe communicates with the outside of the outer insertion portion through the second notch portion and the first notch portion. A joining structure of the pipe according to 1 and a member to be joined.   Both end portions of the second notch portion in the peripheral wall portion of the pipe are locked in the circumferential direction of the peripheral wall portion to both end portions of the first notch portion in the extrapolated portion of the member to be joined. A joining structure of the pipe according to claim 2 and a member to be joined.   The pipe according to claim 2 or 3, wherein a closing member that closes the first notch is fitted in the first notch so as to communicate with the first notch and the second notch. And a joined structure of a member to be joined. A concave portion having an opening recessed toward the inside of the peripheral wall portion and opening toward the outside of the peripheral wall portion is formed extending in the axial direction of the peripheral wall portion at a part of the peripheral wall portion of the pipe. Has been
The pipe is inserted into the insertion hole of the member to be joined so that the inside of the concave portion of the pipe communicates with the outside of the outer insertion portion through the opening and the first notch. A joining structure of the pipe according to 1 and a member to be joined.   The pipe and the member to be joined according to claim 5, wherein a closing member that closes the first notch is fitted to the first notch so as to communicate with the first notch and the opening. Bonding structure. On a part of the circumferential direction of the peripheral wall portion of the pipe, a ridge protruding outside the peripheral wall portion is formed extending in the axial direction of the peripheral wall portion,
2. The pipe according to claim 1, wherein the pipe is inserted into the insertion hole of the member to be joined so that the protruding portion of the pipe passes through the inside of the first notch of the member to be joined in the axial direction. A joined structure with a member to be joined.   The joint structure of a pipe and a member to be joined according to claim 7, wherein at least a base portion of the protruding portion of the pipe is fitted in a first notch portion of the member to be joined.   The pipe and the member to be joined according to any one of claims 1 to 8, wherein a partition wall partitioning the hollow part into a plurality of parts extends integrally in the axial direction of the peripheral wall part on the peripheral wall part of the pipe. Bonding structure. A pipe having a hollow portion;
A first cutout portion that has an insertion portion provided with an insertion hole through which the pipe is inserted, and that communicates the front insertion hole and the outside of the insertion portion with a part of the outer insertion portion in the circumferential direction. Preparing a joined member formed extending in the axial direction of the extrapolated portion,
Insert the pipe through the insertion hole of the member to be joined,
Thereafter, the pipe is expanded, and the member to be joined is joined and fixed to the pipe.   11. The pipe expansion process according to claim 10, wherein the pipe expansion process is performed by pressing the peripheral wall part radially outward with a pipe expansion die that is divided into a plurality of segments in the circumferential direction and disposed in the hollow part. A method of joining a pipe and a member to be joined. A second cutout portion that communicates the hollow portion and the outside of the peripheral wall portion is formed in a part of the peripheral wall portion of the pipe in an axial direction, extending in the axial direction of the peripheral wall portion,
The pipe is inserted into the insertion hole of the member to be joined so that the hollow portion of the pipe communicates with the outside of the outer insertion portion through the second notch portion and the first notch portion,
At the same time as pressing the peripheral wall portion radially outward by the die, both side end portions of the second notch portion in the peripheral wall portion are connected to the first notch portion in the extrapolated portion of the member to be joined. The pipe and the covering according to claim 11, wherein the pipe is bent and pushed outward in the radial direction of the peripheral wall portion by a bending convex portion provided in the segment of the die so as to be locked to both end portions in the circumferential direction of the peripheral wall portion. A joining method with a joining member. A concave portion having an opening recessed toward the inside of the peripheral wall portion and opening toward the outside of the peripheral wall portion is formed extending in the axial direction of the peripheral wall portion at a part of the peripheral wall portion of the pipe. Has been
The pipe is inserted into the insertion hole of the member to be joined so that the inside of the concave portion of the pipe communicates with the outside of the outer insertion portion through the opening and the first notch. The joining method of the pipe of 11 and a to-be-joined member. On a part of the circumferential wall portion of the pipe in a circumferential direction, a protruding portion protruding outside the circumferential wall portion is provided,
The pipe according to claim 10 or 11, wherein the pipe is inserted into the insertion hole of the member to be joined so that the protruding portion of the pipe passes through the inside of the first notch of the member to be joined in the axial direction. A joining method with a member to be joined.   At the same time as pressing the peripheral wall portion radially outward by the die, the inner portion of the first notch portion of the peripheral wall portion is formed on the segment of the die so that the inner portion fits into the first notch portion. The joining method of the pipe and to-be-joined member of Claim 11 which presses in the radial outward direction of the said surrounding wall part by the provided convex part for bulging process, and makes it bulge.   16. The device according to claim 10, wherein the peripheral wall portion is pressed radially outward in a state in which a deformation amount to the outside of the extrapolated portion is regulated by a regulating member disposed outside the extrapolated portion of the joined member. A method of joining the pipe according to claim 1 and a member to be joined.

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