JP2006264444A - Steering support beam and manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steering support beam capable of coupling/fixing a large diameter support beam and a small diameter support beam with sufficient strength. <P>SOLUTION: The steering support beam comprises a cylindrical first support beam 1, a second support beam 2 having a diameter larger than the first beam, and a coupling member 3 equipped with a first cylindrical portion 4 capable of fitting the first beam and a second cylindrical portion 5 capable of fitting the second beam. Accepting recessed portions are formed on inner peripheral surfaces of the first and second cylindrical portions. An end portion of the first beam 1 is inserted and fitted in the first cylindrical portion 4 of the coupling member 3. A diameter expanding portion 11B formed by expanding a diameter of a part of the first beam end portion enter the accepting recessed portion on the inner peripheral surface of the first cylindrical portion 4 to be locked. An end portion of the second beam 2 is inserted and fitted in the second cylindrical portion 5 of the coupling member 3. A diameter expanding portion 11A formed by expanding a diameter of a part of the second beam end portion enter the accepting recessed portion on the inner peripheral surface of the second cylindrical portion 5 to be locked. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a steering support beam installed between the left and right sides of a vehicle body such as an automobile and a method for manufacturing the same.

  In this specification, the term “aluminum” is used to include aluminum and its alloys.

  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 against an impact caused by a collision from the side surface and the like are ensured. A plurality of mounting brackets are welded and fixed to the steering support beam, and various on-vehicle components are fixedly mounted on the mounting brackets.

  The steering support beam needs to have a relatively large strength on the driver's seat side, but does not require that much strength on the passenger seat side. Used a thick support beam with a large diameter, a thin support beam with a small diameter on the passenger side, and a structure in which both support beams were connected by a connecting tool.

  For example, in Patent Document 1, a support beam having a large diameter on the driver's seat side and a support beam having a small diameter on the passenger's seat side are connected by a connector, and these are fixed using mechanical means such as bolts and nuts. It has been proposed to use a steering support beam of construction.

Further, in Patent Document 2, the end portion of the large support beam on the driver's seat side and the end portion of the small support beam on the passenger seat side are butted against the left and right side surfaces of the connecting member and fixed by welding. It has been proposed to use a steering support beam.
JP 2001-253368 A JP 7-315249 A

  However, in the configuration in which the bolt is fastened and fixed as described in Patent Document 1, the bolt is loosened due to the influence of heat in the use environment of the vehicle such as an automobile, that is, due to thermal expansion, and there is a possibility that sufficient coupling strength cannot be maintained. is there. Further, in the case of bolt fastening, there may be a portion where the bolt tightening torque is not sufficient. Furthermore, a plurality of brackets for fixing the steering column, audio, instrument panel, airbag unit, etc. are usually fixed to the steering support beam by a method such as welding. There is also a problem that the production efficiency is low because it is performed in a separate process from the fastening process using the bolt.

  Moreover, in the structure fixed to the connection member by welding as described in Patent Document 2, a sufficient joint strength can be obtained, but a plurality of brackets for fixing a steering column, an audio, an instrument panel, an airbag unit, and the like. Since fixing is performed in a process separate from the welding process to the connecting member, there is a problem that the production efficiency is low.

  The present invention has been made in view of such a technical background, and provides a steering support beam capable of connecting and fixing a large-diameter support beam and a small-diameter support beam with sufficient strength and a method for manufacturing the same. The first purpose. The second object of the present invention is to provide a steering support beam having excellent productivity and a method for manufacturing the same.

  In order to achieve the above object, the present invention provides the following means.

[1] A cylindrical first support beam;
A second support beam having a diameter larger than that of the first support beam;
A first cylindrical portion that can be fitted with the first support beam and a connecting member that has a second cylindrical portion that can be fitted with the second support beam;
A receiving recess is formed on the inner peripheral surface of the first cylindrical portion, and a receiving recess is formed on the inner peripheral surface of the second cylindrical portion,
An end portion of the first support beam is inserted and fitted into the first tubular portion of the connecting member, and a part of the inserted and fitted first support beam end portion is expanded in diameter. The diameter portion enters into the receiving recess on the inner peripheral surface of the first cylindrical portion and is locked,
An end portion of the second support beam is inserted and fitted into the second cylindrical portion of the connecting member, and a part of the inserted and fitted second support beam end portion is expanded in diameter. The first support beam and the second support beam are connected and fixed via a connecting member by the diameter portion entering and engaging with the receiving recess on the inner peripheral surface of the second cylindrical portion. A steering support beam characterized by

  [2] The above-mentioned item 1, wherein a diameter-enlarged portion is formed by expanding the diameters of both sides of the attachment position of the connecting member in the both support beams, and the connecting member is sandwiched and fixed by these expanded-diameter portions. Steering support beam.

  [3] One or a plurality of mounting bracket fitting portions are externally fitted to at least one of the two support beams, and peripheral portions on both sides of the bracket fitting portion mounting position in the support beam are expanded. The mounting bracket is fixed to the support beam by the diameter-enlarged portion being formed by the diameter, and the fitting portion of the mounting bracket being sandwiched by the expanded-diameter portions around the both sides thereof. 3. The steering support beam according to 1 or 2 above.

  [4] The connection member is formed by connecting the first cylindrical portion and the second cylindrical portion with a connection plate portion, and the connection plate portion is formed with a communication hole. The steering support beam according to any one of claims.

  [5] The receiving recess according to any one of items 1 to 4, wherein the receiving recess is formed along a circumferential direction of an inner peripheral surface of the first cylindrical portion and / or an inner peripheral surface of the second cylindrical portion. Steering support beam.

  [6] The steering support beam according to any one of [1] to [5], wherein the connecting member includes a fixing protruding piece for fixing to the bottom of the vehicle body.

  [7] The first cylindrical portion of the connecting member having the first cylindrical portion having the receiving concave portion formed on the inner peripheral surface and the second cylindrical portion having the receiving concave portion formed on the inner peripheral surface is provided with the cylindrical first portion. One end portion of the support beam is inserted and fitted, and one end portion of the cylindrical second support beam is inserted and fitted into the second cylindrical portion of the connecting member, and the outer peripheral surfaces of both the support beams are pressed by a pressing tool. And sealing the other end of the first support beam and the other end of the second support beam and enclosing a fluid inside the both support beams and applying a predetermined pressure to the fluid. The support beam end portions inserted and fitted into the connecting member are expanded in diameter to form an expanded diameter portion, and the expanded diameter portion is received in the receiving recesses on the inner peripheral surfaces of the cylindrical portions. A method for manufacturing a steering support beam, wherein the steering support beam is inserted and locked.

  [8] The first cylindrical portion of the connecting member including the first cylindrical portion having the receiving concave portion formed on the inner peripheral surface and the second cylindrical portion having the receiving concave portion formed on the inner peripheral surface is provided with the cylindrical first portion. One end of the support beam is inserted and fitted, and one end of the cylindrical second support beam is inserted and fitted into the second cylindrical portion of the connecting member, and the connecting member is attached to the outer peripheral surface of the both support beams. In the state where the remaining portions except for the peripheral portions on both sides of the position are pressed with a pressing tool and the other end portion of the first support beam and the other end portion of the second support beam are sealed, the fluid is introduced into the inside of the both support beams. By enclosing and applying a predetermined pressure to the fluid, a part of both support beam ends inserted and fitted in the connecting member is expanded to form an expanded diameter part, and the expanded diameter part Is inserted into the receiving recesses on the inner peripheral surfaces of the cylindrical portions and locked. A method of manufacturing a steering support beam, characterized in that said fixing sandwiching the connecting member by the enlarged diameter portion of both sides brought diameter on both sides periphery of the mounting position of the coupling member in both support beams.

  [9] The first cylindrical portion of the connecting member having the first cylindrical portion having the receiving concave portion formed on the inner peripheral surface and the second cylindrical portion having the receiving concave portion formed on the inner peripheral surface is provided with the cylindrical first portion. One end portion of one support beam is inserted and fitted, and one end portion of a cylindrical second support beam is inserted and fitted to the second cylindrical portion of the connecting member, and the first support beam and / or the second support beam are inserted. The fitting part of one or more mounting brackets is externally fitted, and the remaining parts excluding the peripheral parts on both sides of the connection member and the peripheral parts on both sides of the mounting bracket fitting part on the outer peripheral surface of the both support beams are pressed. In a state where the other end portion of the first support beam and the other end portion of the second support beam are sealed, a fluid is sealed inside the both support beams, and a predetermined pressure is applied to the fluid. By inserting it into the connecting member. A part of both the support beam ends fitted to each other is enlarged to form an enlarged diameter part, and the enlarged diameter part is inserted into the receiving recesses on the inner peripheral surfaces of the two cylindrical parts and locked. The diameters of the peripheral portions on both sides of the attachment positions of the connection members in the both support beams are expanded and the connection members are sandwiched and fixed by the enlarged diameter portions on both sides, and the attachment positions of the attachment bracket fitting portions in the both support beams are fixed. A method for manufacturing a steering support beam, characterized by enlarging the diameters on both sides and sandwiching and fixing the mounting bracket fitting part by the enlarged parts on both sides.

  [10] The connection member is formed by connecting the first cylindrical portion and the second cylindrical portion with a connection plate portion, and a communication hole is formed in the connection plate portion. The manufacturing method of the steering support beam of any one of these.

  [11] The items 7 to 7 above, in which a cylindrical elastic member is arranged along the inner peripheral surfaces of the both support beams, a fluid is sealed inside the both support beams, and a predetermined pressure is applied to the fluid. 11. A method for manufacturing a steering support beam according to any one of 10 above.

  [12] The first cylindrical portion of the connecting member having the first cylindrical portion having the receiving concave portion formed on the inner peripheral surface and the second cylindrical portion having the receiving concave portion formed on the inner peripheral surface is formed in the first cylindrical portion of the connecting member. One end portion of the support beam is inserted and fitted, and one end portion of the cylindrical second support beam is inserted and fitted into the second cylindrical portion of the connecting member, and the outer peripheral surfaces of both the support beams are pressed by a pressing tool. In addition, with the other end portion of the first support beam and the other end portion of the second support beam sealed, an elastic member is sealed inside the both support beams and a predetermined pressure is applied to the elastic member. Accordingly, a part of both support beam end portions inserted and fitted in the connecting member is expanded to form a diameter-expanded portion, and the expanded-diameter portion is a receiving recess on the inner peripheral surfaces of the two cylindrical portions. Steering support beam made of intrusion and locking Method.

  [13] The first cylindrical portion of the connecting member having the first cylindrical portion having the receiving concave portion formed on the inner peripheral surface and the second cylindrical portion having the receiving concave portion formed on the inner peripheral surface is provided with the cylindrical first portion. One end of the support beam is inserted and fitted, and one end of the cylindrical second support beam is inserted and fitted into the second cylindrical portion of the connecting member, and the connecting member is attached to the outer peripheral surface of the both support beams. An elastic member is provided inside the support beams in a state where the remaining portions except for the peripheral portions on both sides of the position are pressed with a pressing tool and the other end portion of the first support beam and the other end portion of the second support beam are sealed. And a predetermined pressure is applied to the elastic member to expand a part of both support beam end portions inserted and fitted in the connecting member to form an enlarged diameter portion. The diameter portion is allowed to enter the receiving recess on the inner peripheral surface of both cylindrical portions. While stopping method of steering support beam, characterized in that said fixing sandwiching the connecting member by the enlarged diameter portion of both sides brought diameter on both sides periphery of the mounting position of the coupling member in both support beams.

  [14] The first cylindrical portion of the connecting member having the first cylindrical portion having the receiving concave portion formed on the inner peripheral surface and the second cylindrical portion having the receiving concave portion formed on the inner peripheral surface is provided with the first cylindrical portion. One end portion of one support beam is inserted and fitted, and one end portion of a cylindrical second support beam is inserted and fitted to the second cylindrical portion of the connecting member, and the first support beam and / or the second support beam are inserted. The fitting part of one or more mounting brackets is externally fitted, and the remaining parts excluding the peripheral parts on both sides of the connection member and the peripheral parts on both sides of the mounting bracket fitting part on the outer peripheral surface of the both support beams are pressed. In a state where the other end portion of the first support beam and the other end portion of the second support beam are sealed while being pressed by a tool, an elastic member is sealed inside the both support beams, and a predetermined amount is applied to the elastic member. By applying pressure, the connection A part of both support beam ends inserted and fitted in the material is expanded to form an expanded diameter part, and the expanded diameter part is allowed to enter the receiving recesses on the inner peripheral surfaces of the cylindrical parts. The mounting member fitting portion of the both support beams is fixed by sandwiching and fixing the connecting members by expanding the diameters of both sides of the mounting positions of the connecting members in the both support beams. A method for manufacturing a steering support beam, comprising: enlarging the peripheral portions on both sides of the mounting position and sandwiching and fixing the mounting bracket fitting portions by the enlarged portions on both sides.

  [15] The method for manufacturing a steering support beam according to any one of items 12 to 14, wherein hard rubber is used as the elastic member.

  [16] The first cylindrical portion of the connecting member having the first cylindrical portion having the receiving concave portion formed on the inner peripheral surface and the second cylindrical portion having the receiving concave portion formed on the inner peripheral surface is provided with the cylindrical first portion. One end of the support beam is inserted and fitted, and one end of the cylindrical second support beam is inserted and fitted into the second cylindrical portion of the connecting member, and the outer peripheral surfaces of the both support beams are pressed by a pressing tool. In this state, by placing an electromagnetic forming coil inside the both support beams and energizing the coils, a part of both support beam end portions inserted and fitted in the connecting member is expanded. A method for manufacturing a steering support beam, comprising: forming an enlarged diameter portion, and inserting the enlarged diameter portion into a receiving recess on an inner peripheral surface of both the cylindrical portions.

  [17] The first cylindrical portion of the connecting member having the first cylindrical portion having the receiving concave portion formed on the inner peripheral surface and the second cylindrical portion having the receiving concave portion formed on the inner peripheral surface is provided with the first cylindrical portion. One end of the support beam is inserted and fitted, and one end of the cylindrical second support beam is inserted and fitted into the second cylindrical portion of the connecting member, and the connecting member is attached to the outer peripheral surface of the both support beams. Insert and fit into the connecting member by placing an electromagnetic forming coil inside the both support beams and energizing the coil with the rest of the position excluding the peripheral parts on both sides held by the pressing tool. A part of both the support beam ends is enlarged to form a diameter-enlarged part, the diameter-increased part is intruded into the receiving recesses on the inner peripheral surfaces of the cylindrical parts, and Increase the diameter of the periphery of both sides of the mounting position of the connecting member in both support beams. Method of manufacturing a steering support beam, characterized in that securing sandwiching the connecting member by the enlarged diameter portion of both sides Te fit.

  [18] The first cylindrical portion of the connecting member having the first cylindrical portion having the receiving concave portion formed on the inner peripheral surface and the second cylindrical portion having the receiving concave portion formed on the inner peripheral surface is provided with the cylindrical first portion. One end portion of one support beam is inserted and fitted, and one end portion of a cylindrical second support beam is inserted and fitted to the second cylindrical portion of the connecting member, and the first support beam and / or the second support beam are inserted. The fitting part of one or more mounting brackets is externally fitted, and the remaining parts excluding the peripheral parts on both sides of the connection member and the peripheral parts on both sides of the mounting bracket fitting part on the outer peripheral surface of the both support beams are pressed. By holding the electromagnetic forming coil inside the both support beams and energizing the coils while being held by the tool, a part of the end portions of the support beams inserted and fitted into the connecting member is expanded. Forming an enlarged diameter portion and Part is inserted into the receiving recess on the inner peripheral surface of both cylindrical parts and locked, and the peripheral parts on both sides of the mounting position of the connecting member in the both support beams are enlarged, and the enlarged parts on both sides are used. The connecting member is sandwiched and fixed, and the peripheral portions on both sides of the mounting position of the mounting bracket fitting portion on both the support beams are enlarged, and the mounting bracket fitting portion is sandwiched and fixed by the enlarged portions on both sides. A method of manufacturing a steering support beam characterized by the above.

  [19] The method for manufacturing a steering support beam according to any one of [16] to [18], wherein the electromagnetic forming coil is disposed at a position adjacent to an inner peripheral surface of the support beam in an inner space of the both support beams.

  [20] A steering support beam manufactured by the manufacturing method according to any one of items 7 to 19.

  In the invention of [1], the enlarged diameter portion formed by enlarging the diameter of a part of the support beam end portion inserted and fitted into the cylindrical portion of the connecting member is the receiving recess on the inner peripheral surface of the cylindrical portion. Since the first support beam and the second support beam are connected and fixed via the connecting member by intruding into and locking in, the large diameter support beam and the small diameter support beam are sufficient. Strong and stable connection. Since it is not connected and fixed using a bolt etc. like the prior art, there is no fear of a decrease in connection strength due to loosening of the bolt or the like. Further, since welding is not required for connection, the strength of the support beam is not reduced by the influence of heat. Furthermore, since welding is not required, there is also an advantage that different materials can be combined as a support beam and a connecting member.

  In the invention of [2], since the connecting member is sandwiched and fixed by the enlarged diameter portions formed on both sides of the attachment position of the connecting member in the support beam, the connection strength can be further improved.

  In the invention of [3], since the bracket fitting portion is sandwiched and fixed by the enlarged diameter portions formed on both sides of the bracket fitting portion attachment position in the support beam, the mounting bracket is also sufficient with respect to the support beam. It is fixed in a stable state with a sufficient strength. Furthermore, since welding is not required, there is also an advantage that different materials can be combined as a support beam, a connecting member, and a mounting bracket.

  In the invention of [4], since the communication hole is formed in the connection plate portion of the connection member, when the fluid is enclosed in the support beam and the pressure is applied to the fluid to expand the diameter, Just by sealing the fluid from one end of the support beam, the fluid can be sealed inside both the support beams through the communication hole, and only a predetermined pressure is applied to the fluid from one end of either support beam. This has the advantage that productivity can be improved.

  In the invention of [5], the enlarged diameter portion of the end portion of the support beam is formed in the receiving concave portion formed along the circumferential direction of the inner peripheral surface of the first cylindrical portion and / or the inner peripheral surface of the second cylindrical portion. Since it enters and is locked, and the locking structure is formed along the circumferential direction of the inner peripheral surface of the cylindrical portion of the connecting member in this way, the connection strength can be further improved.

  In the invention of [6], it can be fixed in a stable state with sufficient strength with respect to the bottom of the vehicle body.

  In the inventions of [7], [8] and [9], the ends of the support beams inserted and fitted into the connecting member by enclosing the fluids in the support beams and applying a predetermined pressure to the fluids. A part of the part is enlarged to form an enlarged part, and the enlarged part is intruded into the receiving recesses on the inner peripheral surfaces of both cylindrical parts and locked. And can be connected in a stable state with sufficient strength. Further, since welding is not required for connection, the strength of the support beam is not reduced by the influence of heat.

  Further, in the inventions of [8] and [9], the peripheral portions on both sides of the attachment positions of the connection members in both support beams are expanded by the fluid pressure, and the connection members are sandwiched and fixed by the expanded portions on both sides. The connection strength of the beam can be further improved.

  In addition, in the invention of [9], the peripheral portion on both sides of the mounting position of the mounting bracket fitting portion in both support beams is expanded by the fluid pressure, and the mounting bracket fitting portion is sandwiched by the enlarged portions on both sides. Since it is fixed, the mounting bracket can be fixed to the support beam with sufficient strength and in a stable state. As described above, in the invention [9], since it is a manufacturing method capable of simultaneously connecting both support beams through the connecting member and mounting and fixing one or more mounting brackets to the support beam, the manufacturing efficiency is improved. It can be improved significantly. Furthermore, since welding is not required, there is also an advantage that different materials can be combined as a support beam, a connecting member, and a mounting bracket.

  In the invention of [10], since the communication hole is formed in the connection plate portion of the connection member, the fluid is sealed from one end side of any one of the support beams, and the inside of both support beams through the communication holes. The fluid can be enclosed, and the diameter can be expanded simply by applying a predetermined pressure to the fluid from one end side of any one of the support beams, thereby further improving the production efficiency.

  In the invention of [11], a cylindrical elastic member is arranged in a manner along the inner peripheral surfaces of both support beams, a fluid is sealed inside the both support beams, and a predetermined pressure is applied to the fluid. Therefore, the diameter can be sufficiently expanded.

  [12] In the inventions of [13] and [14], both supports inserted and fitted into the connecting member by enclosing the elastic members inside the both support beams and applying a predetermined pressure to the elastic members. A part of the beam end portion is enlarged to form an enlarged diameter portion, and the enlarged diameter portion is intruded into the receiving recesses on the inner peripheral surfaces of the two cylindrical portions, so that both support beams are connected to each other. It is possible to connect to a stable state with sufficient strength. Further, since welding is not required for connection, the strength of the support beam is not reduced by the influence of heat.

  Furthermore, in the inventions of [13] and [14], the elastic members are elastically deformed by pressurizing to expand the diameters of the peripheral portions on both sides of the mounting positions of the connecting members in both support beams, and the connecting members are sandwiched by the expanded portions on both sides. Since it is fixed, the connection strength of both support beams can be further improved.

  In addition, in the invention of [14], the peripheral portions on both sides of the mounting position of the mounting bracket fitting portions in both support beams are expanded by elastic deformation due to the pressure of the elastic member, and the mounting portions are mounted by the expanded diameter portions on both sides. Since the bracket fitting portion is sandwiched and fixed, the mounting bracket can be fixed to the support beam with sufficient strength and in a stable state. As described above, in the invention [14], since it is a manufacturing method in which both the support beams can be connected via the connecting member and one or more mounting brackets can be fixedly attached to the support beam at the same time, the manufacturing efficiency can be improved. It can be improved significantly. Furthermore, since welding is not required, there is also an advantage that different materials can be combined as a support beam, a connecting member, and a mounting bracket.

  In the invention [15], since hard rubber is used as the elastic member, the diameter can be sufficiently expanded.

  [16] In the inventions of [17] and [18], an electromagnetic forming coil is disposed inside both support beams and the coils are energized, whereby one end of both support beams inserted into the connecting member is fitted. The diameter of the portion is expanded to form an enlarged diameter portion, and the enlarged diameter portion is intruded into the receiving recesses on the inner peripheral surfaces of the two cylindrical portions to be locked. It is strong and can be connected in a stable state. Further, since welding is not required for connection, the strength of the support beam is not reduced by the influence of heat.

  Furthermore, in the inventions of [17] and [18], both sides of the mounting position of the connecting member in both support beams are expanded by the electromagnetic forming method, and the connecting member is sandwiched and fixed by the expanded portions on both sides. The connection strength of the support beam can be further improved.

  In addition, in the invention of [18], the mounting bracket fitting portion is formed by expanding the diameters of both sides of the mounting position of the mounting bracket fitting portion in both support beams by the electromagnetic forming method, and expanding the diameters on both sides. Since it is clamped and fixed, the mounting bracket can be fixed to the support beam with sufficient strength and in a stable state. Thus, in the invention of [18], since it is a manufacturing method capable of simultaneously connecting and fixing both the support beams through the connecting member and mounting and fixing one or more mounting brackets to the support beam, the manufacturing efficiency is improved. It can be improved significantly. Furthermore, since welding is not required, there is also an advantage that different materials can be combined as a support beam, a connecting member, and a mounting bracket.

  According to the invention [19], the diameter can be sufficiently expanded.

  In the invention of [20], a steering support beam is provided in which a support beam having a large diameter and a support beam having a small diameter are connected in a stable state with sufficient strength.

  One embodiment of a steering support beam (10) according to the present invention is shown in FIGS. The steering support beam (10) of the present embodiment is an automotive steering support beam that is disposed between the left and right front pillars of a vehicle body and is connected and fixed to the front pillars. 1 and 2, (1) is a first support beam, (2) is a second support beam, (3) is a connecting member (node), (21) (24) (27) (30) (33) ( 36) is a mounting bracket.

  The first support beam (1) and the second support beam (2) are both made of a cylindrical extruded material having an elliptical cross section. The second support beam (2) is formed larger in diameter than the first support beam (1) and is disposed on the driver's seat side. On the other hand, the first support beam (1) having a small diameter is disposed on the passenger seat side.

  The connecting member (3) has an elliptical cross section capable of fitting the first support beam (1) and an elliptical cross section capable of fitting the second support beam (2). The second cylindrical part (5) is provided, and the cylindrical parts (4) and (5) are connected by the connecting plate part (6). That is, the first cylindrical portion (4) is extended on one side surface (right side of the drawing) of the connecting plate portion (6) and on the other side surface (left side of the drawing) of the connecting plate portion (6). A second tubular part (5) is extended. A single receiving recess (8) extending in the circumferential direction is formed on the inner peripheral surface of the first cylindrical portion (4), and the inner peripheral surface of the first cylindrical portion (5) is circumferentially formed. A receiving recess (9) extending along the line is formed. In addition, a communication hole (7) is provided in the central portion of the connection plate part (6), and the internal space of the first support beam (1) and the second support beam are connected via the communication hole (7). The internal space of (2) is communicated. Further, a long center stay (fixing protruding piece) (19) is integrally extended from the lower part of the connecting member (3). The connecting member (3) connected to the center stay (19) is formed of an injection molding material.

  As shown in FIGS. 1 and 2, the front pillar mounting side bracket (21) includes a fitting portion (22) having an elliptical cross section that can be fitted onto the second support beam (2), and the fitting portion ( 22) and an attachment portion (23) extending outward. As shown in FIGS. 1 and 2, the other front pillar mounting side bracket (24) has an elliptical cross-section fitting portion (25) that can be externally fitted to the first support beam (1). It consists of an attachment part (26) extended outward from this fitting part (25).

  As shown in FIGS. 1 and 2, the column mounting bracket (27) includes a fitting portion (28) having an elliptical cross section that can be fitted onto the second support beam (2), and the fitting portion (28). And an attachment portion (29) projecting outward from the outer peripheral surface of the.

  As shown in FIGS. 1 and 2, the airbag unit mounting bracket (30) includes a fitting portion (31) having an elliptical cross section that can be fitted onto the first support beam (1), and the fitting portion ( 31) and an attachment portion (32) projecting outward from the outer peripheral surface.

  As shown in FIGS. 1 and 2, the audio mounting bracket (33) includes a fitting portion (34) having an elliptical cross section that can be fitted onto the first support beam (1), and the fitting portion (34). And an attachment portion (35) extended outward.

  As shown in FIGS. 1 and 2, the glove box mounting bracket (36) includes a fitting portion (37) having an elliptical cross section that can be fitted onto the first support beam (1), and the fitting portion (37 ) And an attachment portion (38) extending outward.

  The mounting brackets (21) (24) (27) (30) (33) (36) are all made of extruded material.

  Thus, the end portion of the first support beam (1) is inserted and fitted into the first cylindrical portion (4) of the connecting member (3), and the first support beam (1) fitted and fitted is inserted. The enlarged diameter portion (11B) protruding outward by partly expanding the diameter of the end portion enters the receiving recess (8) on the inner peripheral surface of the first tubular portion (4) and engages. It has been stopped. Further, the end of the second support beam (2) is inserted and fitted into the second cylindrical portion (5) of the connecting member (3), and the end of the second support beam (2) thus fitted and fitted. The diameter-enlarged portion (11A) that protrudes outward by partly expanding the diameter of the portion enters the receiving recess (9) on the inner peripheral surface of the second cylindrical portion (5) and is locked. Has been. Due to such a locking structure with respect to the connecting member (3), the first support beam (1) and the second support beam (2) are firmly connected and fixed via the connecting member (3).

  In addition, the peripheral portion (right peripheral portion) of the attachment position of the connecting member (3) in the first support beam (1) is expanded in diameter to form the expanded diameter portion (12B) extending in the circumferential direction, The peripheral part (left peripheral part) of the attachment position of the connecting member (3) in the second support beam (2) is enlarged in diameter to form an enlarged diameter part (12A) extending in the circumferential direction, and these enlarged diameter parts (12A) ) (12B), the connecting member (3) is sandwiched and fixed.

  Further, the fitting portion (25) of the front pillar mounting side bracket (24) is fitted on the outer peripheral surface of the right end portion (end portion on the non-connection side) of the first support beam (1), In the first support beam (1), the peripheral portions on both sides of the fitting portion (25) mounting position are enlarged to form the enlarged diameter portions (14A) and (14B) extending in the circumferential direction. These enlarged diameter portions (14A) ) (14B), the fitting portion (25) of the side bracket (24) is sandwiched and fixed so that the side bracket (24) is in a stable state with respect to the first support beam (1). It is firmly fixed.

  Further, the fitting portion (22) of the front pillar mounting side bracket (21) is externally fitted to the outer peripheral surface of the left end portion (non-connecting end portion) of the second support beam (2), In the second support beam (2), the peripheral portions on both sides of the fitting portion (22) mounting position are enlarged to form the enlarged diameter portions (13A) and (13B) extending in the circumferential direction. These enlarged diameter portions (13A) ) (13B), the fitting portion (22) of the side bracket (21) is sandwiched and fixed so that the side bracket (21) is in a stable state with respect to the second support beam (2). It is firmly fixed.

  Further, the fitting portion (28) of the column mounting bracket (27) is fitted on the outer peripheral surface of the center portion of the second support beam (2), and the fitting in the second support beam (2) is performed. The diameter-enlarged portions (15A) and (15B) extending in the circumferential direction are formed by enlarging the diameters on both sides of the portion (28) mounting position, and the column-attaching portions are formed between these enlarged-diameter portions (15A) and (15B). By fitting and fixing the fitting portion (28) of the bracket (27), the column mounting bracket (27) is stably and firmly fixed to the second support beam (2).

  The fitting portion (31) of the airbag unit mounting bracket (30) is fitted on the outer peripheral surface of the substantially central portion of the first support beam (1), and the first support beam (1). The diameter-enlarged portions (16A) and (16B) extending in the circumferential direction are formed by expanding the diameters at both sides of the fitting portion (31) attachment position in the above-described manner, and the above-mentioned diameter-enlarged portions (16A) and (16B) By fitting and fixing the fitting portion (31) of the airbag unit mounting bracket (30), the airbag unit mounting bracket (30) is in a stable state with respect to the first support beam (1). It is firmly fixed.

  Further, the fitting portion (34) of the audio mounting bracket (33) is fitted on the outer peripheral surface of the substantially central portion of the first support beam (1), and the fitting in the first support beam (1) is performed. The diameter-enlarged portions (17A) and (17B) extending in the circumferential direction are formed by enlarging the diameters on both sides of the joint portion (34) mounting position, and the audio mounting portion is formed between these expanded-diameter portions (17A) and (17B). By fitting and fixing the fitting portion (34) of the bracket (33), the audio mounting bracket (33) is stably and firmly fixed to the first support beam (1). .

  Further, a fitting portion (37) of a glove box mounting bracket (36) is externally fitted on the outer peripheral surface of the substantially central portion of the first support beam (1), and the first support beam (1) The diameter-enlarged portions (18A) (18B) extending in the circumferential direction are formed by expanding the diameters on both sides of the fitting portion (37) mounting position, and the globe is interposed between the expanded-diameter portions (18A) (18B). By fitting and fixing the fitting portion (37) of the box mounting bracket (36), the glove box mounting bracket (36) is stably and firmly fixed to the first support beam (1). Has been.

  In this manner, the mounting brackets (21), (24), (27), (30), (33), and (36) are all securely fixed to the support beam in a stable state.

  The center stay (elongated fixing projection piece) (19) extended from the connecting member (3) has its lower end fixed to the bottom of the passenger compartment. The front pillar mounting side bracket (21) is fixed to the front pillar on the driver seat side of the vehicle body, while the front pillar mounting side bracket (24) is fixed to the front pillar on the passenger seat side of the vehicle body, Thus, the steering support beam (10) is fixed in a stable state and firmly to the vehicle body.

  The connecting member (3) and the center stay member (20) may be configured separately. That is, for example, as shown in FIG. 9, the fixing protrusion piece (40) of the connecting member (3) and the center stay member (20) are connected and fixed by fixing means such as bolts, and the center stay member (20). You may make it fix the lower end part of this to the fixing member (91) protrudingly provided from the floor (90) using fixing means, such as a volt | bolt.

  The steering support beam (10) according to the above configuration is manufactured as follows, for example. The 1st manufacturing method using a fluid pressure is demonstrated referring FIGS. 3-5 and FIG.

  First, a first cylindrical part (4) having an elliptical cross section capable of fitting the first support beam (1) and a second cylindrical part having an elliptical cross section capable of fitting the second support beam (2) ( 5) and a connecting plate portion (6) connecting these cylindrical portions (4) and (5), and extended along the circumferential direction on the inner peripheral surface of the first cylindrical portion (4). A single receiving recess (8) is formed, and a single receiving recess (9) extending along the circumferential direction is formed on the inner peripheral surface of the second cylindrical portion (5), and the connecting plate portion ( A connecting member (3) having a configuration in which a communication hole (7) is provided at the center of 6) is prepared (see FIG. 3).

  One end portion of the first support beam (1) having an elliptical cross section is inserted and fitted into the first cylindrical portion (4) of the connection member (3), and the second cylindrical portion of the connection member (3). (5) Insert and fit one end of the second support beam (2) having an elliptical cross section (see FIG. 3). In FIG. 3, reference numerals (68) and (69) denote O-rings arranged to realize a sufficiently liquid-tight state.

  The fitting portion (34) of the audio mounting bracket (33) and the fitting portion (37) of the glove box mounting bracket (36) are fitted on the outer peripheral surface of the substantially central portion of the first support beam (1). To do. Further, the fitting portion (31) of the airbag unit mounting bracket (30) is externally fitted on the outer peripheral surface of the first support beam (1) at a position close to the right end side from the substantially central portion. Further, the fitting portion (25) of the front pillar mounting side bracket (24) is externally fitted to the outer peripheral surface of the right end portion (non-connecting end portion) of the first support beam (1).

  Further, the fitting portion (28) of the column mounting bracket (27) is externally fitted to the outer peripheral surface of the central portion of the second support beam (2), and the left end portion of the second support beam (2) The fitting portion (22) of the front pillar mounting side bracket (21) is externally fitted on the outer peripheral surface of the (non-connected end portion). As described above, the mounting brackets (21) (24) (27) (30) (33) (36) are arranged at predetermined positions with respect to both the support beams (1) (2) (see FIG. 3).

  Next, as shown in FIG. 4, the peripheral portions on both sides of the connecting member (3) and the mounting bracket fitting portions (22) and (25) on the outer peripheral surfaces of the first and second support beams (1) and (2). (28) (31) (34) (37) The remaining parts excluding the peripheral parts on both sides are pressed by a split mold that can be divided vertically (51) (53) (55) (56) (57) (59 ) And hold it in a pressed state. Further, the outer side of the column mounting bracket (27) is held in a state where it is sandwiched and held by a pressing tool (52) made of a split mold that can be divided vertically, and the outer side of the connecting member (3) is separated from the split mold that can be divided vertically. Is held by being pressed by the pressing tool (54), and the outer side of the airbag unit mounting bracket (30) is held by being pressed by the pressing tool (58) made of a split mold that can be divided vertically. (See FIG. 4). In addition, arrangement | positioning of the pressing tools (52) (54) (58) which hold | suppress the said bracket (27) (30) and a connection member (3) is not essential. For example, when the brackets (27) (30) and the connecting member (3) have sufficient strength and rigidity against the internal pressure generated by applying a predetermined pressure to the fluid, the pressing tool (52) (54) The arrangement of (58) is not necessary. In addition, when the diameter of the first support beam (1) and the diameter of the second support beam (2) are extremely different, the required internal pressure (internal pressure necessary for expanding the diameter) is different. Further, the diameter may be expanded in a state where a restricting means for preventing excessive diameter expansion is arranged around the position to be expanded.

  Moreover, as shown in FIG. 4, the right end part (end part on a non-connecting side) of the first support beam (1) is sealed in a liquid-tight state by a sealing tool (61). The sealing tool (61) has a substantially disk shape, and an elastic seal member (61A) is integrated on one surface thereof, and the elastic seal member (61A) is connected to the right end of the first support beam (1). The right end of the first support beam (1) is sealed in a liquid-tight state by applying an axial force from the outside to the inside of the sealing tool (61) while being in contact with the opening surface of the first support beam (61). Stop.

  Furthermore, as shown in FIG. 4, the left end portion (end portion on the non-connection side) of the second support beam (2) is sealed in a liquid-tight state by a sealing tool (62). The sealing tool (62) has a substantially disc shape, and an elastic seal member (62A) is integrated on one surface thereof, and the elastic seal member (62A) is connected to the left end of the second support beam (2). The left end of the second support beam (2) is sealed in a liquid-tight state by applying an axial force from the outside to the inside of the sealing tool (62) while being in contact with the opening surface of the second support beam (2). Stop. The sealing tool (62) is formed with through holes (63) (63) penetrating in the thickness direction (see FIG. 4).

  Thereafter, when a fluid such as water or oil is sealed in the second support beam (2) through the through holes (63) and (63) of the sealing tool (62), the fluid is connected to the connecting member (3). It passes through the communication hole (7) and is also enclosed in the first support beam (1). Next, a predetermined pressure is applied to the fluid. Although a pressure is not specifically limited, Usually, it is the range of 5-70 MPa.

  When a predetermined pressure is applied to the fluid, that is, while the pressure from the outside to the inside is applied to the sealing devices (61) and (62), the pressing devices (51) (52) (53) (54) ), (55), (56), (57), (58), and (59), when a predetermined pressure is applied to the fluid while being restrained by applying an inward pressure from the outside, as shown in FIG. Further, a part of the ends of both support beams (1) and (2) inserted and fitted into the connecting member (3) is expanded to form expanded diameter portions (11A) and (11B). The portion (11A) enters and locks into the receiving recess (9) on the inner peripheral surface of the second cylindrical portion (5), and the enlarged diameter portion (11B) is the first cylindrical portion (4). ) Enters and locks into the receiving recess (8) on the inner peripheral surface of the inner peripheral surface of both sides of the mounting position of the connecting member (3) in the both support beams (1) and (2). The diameter of the portion expands to form the enlarged diameter portions (12A) and (12B), and the connecting member (3) is sandwiched and fixed by the enlarged diameter portions (12A) and (12B) on both sides, and the support beams (1 ) (2) In the mounting bracket fitting portion (22) (25) (28) (31) (34) (37), the peripheral portions on both sides of the mounting position are expanded in diameter, and the expanded diameter portion (13A) (13B). (14A), (14B), (15A), (15B), (16A), (16B), (17A), (17B), (18A), and (18B) are formed, and the mounting bracket fitting portions are sandwiched by the enlarged diameter portions on both sides. It will be fixed.

  Next, when the presser (51) (52) (53) (54) (55) (56) (57) (58) (59) and the sealing tool (61) (62) are removed, as shown in FIG. A steering support beam (10) can be obtained.

  Next, a modification of the first manufacturing method will be described with reference to FIG. In this manufacturing method, as shown in FIG. 6, in the state where the elastic tube material (cylindrical elastic member) (80) is disposed in the inside of both support beams (1) and (2) along the inner peripheral surface. Except that the fluid is sealed in both the support beams (1) and (2) and a predetermined pressure is applied to the fluid, the operation is performed in the same manner as in the first manufacturing method to expand the diameter. To do. In this manufacturing method, since a predetermined pressure is applied to the elastic tube member (80) via a fluid, the diameter can be sufficiently expanded. Although it does not specifically limit as said elastic tube material (80), Hard rubber is suitable.

  In the first production method, the fluid is not particularly limited, and examples thereof include water and oil.

  Next, a second manufacturing method using an elastic member will be described with reference to FIG. In this second manufacturing method, an elastic member (which can be elastically deformed by pressurization, instead of performing an operation of enclosing a fluid inside both the support beams (1) and (2) and applying a predetermined pressure to the fluid) 66) and a predetermined pressure is applied to the elastic member (66), and the first support beam (instead of disposing the sealing members (61) and (62) at both ends). 1) Same as the first manufacturing method, except that the pressing tool (64) is inserted in the right end portion and the pressing tool (65) is inserted in the left end portion of the second support beam (2). Therefore, the same parts are denoted by the same reference numerals and the description thereof is omitted.

  In this second manufacturing method, as shown in FIG. 7 (a), an elastic member (66) that can be elastically deformed by pressurization is sealed inside both support beams (1) and (2), and the elastic member (66 ), A predetermined pressure is applied from the outside through the pressing tools (64) and (65). Then, as shown in FIG. 7B, a part of the end portions of both support beams (1) and (2) inserted and fitted into the connecting member (3) expands to increase the diameter (11A). (11B) is formed, the enlarged diameter portion (11A) enters and locks into the receiving recess (9) on the inner peripheral surface of the second cylindrical portion (5), and the enlarged diameter portion (11B) ) Enters and locks into the receiving recess (8) on the inner peripheral surface of the first cylindrical portion (4), and the attachment position of the connecting member (3) in the both support beams (1) and (2) The peripheral portions of both sides are enlarged in diameter to form enlarged diameter portions (12A) and (12B), and the connecting members (3) are sandwiched and fixed by the enlarged diameter portions (12A) and (12B) on both sides, and the both supports Mounting position of mounting bracket fitting portion (22) (25) (28) (31) (34) (37) in beam (1) (2) The diameters on both sides are enlarged to form enlarged diameter portions (13A) (13B) (14A) (14B) (15A) (15B) (16A) (16B) (17A) (17B) (18A) (18B). The mounting bracket fitting portions can be sandwiched and fixed by the enlarged diameter portions on both sides. That is, it is pressed by the pressing tools (51) (52) (53) (54) (55) (56) (57) (58) (59) of both support beams (1) and (2) in FIG. The part which is not present can be expanded. Thus, the steering support beam (10) of the present invention can be manufactured.

  Next, a third manufacturing method using electromagnetic forming will be described with reference to FIG. In this third manufacturing method, instead of performing an operation of enclosing a fluid inside the both support beams (1) and (2) and applying a predetermined pressure to the fluid, both the support beams (1) and (2) Except that the electromagnetic forming coil (70) is placed inside and the coil (70) is energized, and the sealing tools (61) (62) at both ends are not arranged. Since it is the same as that of the 1st manufacturing method, about the same part, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the third manufacturing method, as shown in FIG. 8 (a), the electromagnetic forming coil (70) is disposed inside both the support beams (1) and (2). Preferably, the electromagnetic forming coil (70) is disposed in the vicinity of the inner peripheral surface of the support beams (1) and (2) in the internal space of the both support beams (1) and (2) (see FIG. 8A). ). Thus, for example, when a large current is suddenly applied to the coil (70), an induced current called an eddy current flows through both support beams (1) and (2), and both support beams (1) and (2) are heated by Joule heat. In addition, since the electromagnetic force acts in the direction of pressing (pressing) both support beams (1) and (2) outward, that is, pressing outward while heating, as shown in FIG. A part of the ends of the support beams (1) and (2) inserted and fitted into the connecting member (3) is expanded in diameter to form expanded diameter portions (11A) and (11B). 11A) enters and locks into the receiving recess (9) on the inner peripheral surface of the second cylindrical portion (5), and the enlarged diameter portion (11B) of the first cylindrical portion (4). It enters and locks into the receiving recess (8) on the inner peripheral surface, and is a connecting portion in both the support beams (1) and (2). The peripheral portions on both sides of the mounting position of (3) are expanded to form expanded diameter portions (12A) and (12B), and the connecting member (3) is sandwiched and fixed by the expanded diameter portions (12A) and (12B) on both sides. In addition, the peripheral portions on both sides of the mounting positions of the mounting bracket fitting portions (22) (25) (28) (31) (34) (37) in both the support beams (1) and (2) are enlarged. The enlarged diameter portions (13A), (13B), (14A), (14B), (15A), (15B), (16A), (16B), (17A), (17B), (18A), and (18B) are formed. The mounting bracket fitting portion can be sandwiched and fixed. In other words, the support beams (1) and (2) shown in FIG. 8 (a) are pressed by the pressing members (51) (52) (53) (54) (55) (56) (57) (58) (59). The part which is not present can be expanded. Thus, the steering support beam (10) of the present invention can be manufactured.

  In the embodiment shown in FIG. 8, the electromagnetic forming coil (70) is disposed along the entire inner surface of the support beams (1) and (2) in the internal space of the both support beams (1) and (2). However, for example, the electromagnetic forming coil (70) may be selectively disposed at a position where the diameter is desired to be expanded.

  In this invention, although the width (W) of the said enlarged diameter part (11-18) is not specifically limited, It is preferable to set to 5-30 mm. Moreover, it is preferable that the widths of these enlarged diameter portions are all set to the same width. Moreover, although the deformation amount (expansion amount) (h) of the said enlarged diameter part (11-18) is not specifically limited, It is preferable to set to 0.5-3 mm.

  The outer diameters of the first support beam (1) and the second support beam (2) are preferably set to 60 to 100 mm (especially in the case where the support beam is made of an aluminum material). Is good). The thickness of the first support beam (1) and the second support beam (2) is preferably set to 1.5 to 5 mm (especially when the support beam is made of an aluminum material). Set to a range).

  In the above embodiment, the support beams (1) and (2) have an elliptical cross section. However, the support beams (1) and (2) are not particularly limited to such a shape. For example, the cross section is a quadrangle, pentagon, or hexagon. Further, it may be formed in a polygonal shape such as an octagon or other irregular cross-sectional shapes. Among them, the support beams (1) and (2) are preferably formed to have an elliptical or polygonal cross section. In this case, the connecting member (3) and the fitting portion of the mounting bracket are fixed. There is an advantage that these can be reliably prevented from rotating in the circumferential direction of the support beams (1) and (2) at times. For example, when the support beams (1) and (2) have a polygonal cross section, the fitting portion of the mounting bracket and the first and second cylindrical portions (4) and (5) of the connecting member (3). ) May be configured in a polygonal shape that can be externally fitted to the support beams (1) and (2) having a polygonal cross section. The same applies when the support beams (1) and (2) are formed in other irregular cross-sectional shapes. In addition, when adopting a polygonal cross section as the support beams (1) and (2), it is preferable to make the corners into a substantially arcuate shape (with roundness) without making the corners square. This can sufficiently prevent the occurrence of cracks during diameter expansion.

  The means for preventing the connecting member (3) and the mounting bracket fitting portion from rotating in the circumferential direction of the support beams (1) and (2) when the fitting portion is fixed is described above. In addition to the configuration, for example, a concave groove extending in the axial direction is formed on the inner peripheral surface of the connecting member (3) or the mounting bracket fitting portion (22) (25) (28) (31) (34) (37). By applying a predetermined pressure to the fluid (others such as electromagnetic forming), the positions corresponding to the concave grooves in the first support beam (1) and the second support beam (2) are expanded. Examples include a configuration in which an enlarged diameter portion is formed and the enlarged diameter portion is inserted into the concave groove of the connecting member or the mounting bracket fitting portion (see Japanese Patent Application Laid-Open No. 7-116751).

  Moreover, in the said embodiment, although the structure which consists of an injection molding material of resin (FRP is also included) is employ | adopted for the connection member (3), it is not specifically limited to such a structure, For example, extrusion material , Casting (Mg casting, etc.), forging, sheet metal press (iron sheet metal, etc.), casting (cast iron, etc.), extrusion + cutting.

  In the above embodiment, the first support beam (1), the second support beam (2), and the mounting brackets (21) (24) (27) (30) (33) (36) are all extruded materials. Although the structure which consists of is employ | adopted, it is not limited to such a structure in particular. For example, the first support beam (1), the second support beam (2), and the mounting brackets (21), (24), (27), (30), (33), and (36) are made by injection molding of resin (including FRP). It may be formed of a material. Moreover, the 1st support beam (1) and the 2nd support beam (2) may be formed with iron or copper, or may be comprised with the electric-welded tube of aluminum or iron. Mounting brackets (21) (24) (27) (30) (33) (36) are cast (Mg casting, etc.), forging, sheet metal press (iron sheet metal, etc.), casting (cast iron, etc.), extrusion + cutting May be formed.

  The extruded material is preferably an extruded material made of a light metal or an alloy thereof. Among them, the extruded material is particularly preferably an aluminum extruded material, and in this case, excellent productivity can be secured while maintaining excellent lightness. Examples of the aluminum extruded material include 5000 series, 6000 series, and 7000 series.

  Alternatively, the extruded material is preferably a synthetic resin extruded material, and in this case, excellent productivity can be secured while maintaining excellent lightness.

  Further, for example, the mounting brackets (21) (24) (27) (30) (33) (36) are made of iron sheet metal, and the first support beam (1) and the second support beam (2). May be made of an extruded aluminum material. In this case, it is necessary to design a caulking allowance by sufficiently considering a decrease in caulking strength due to a difference in thermal expansion coefficient between materials.

  The fitting portions (22) (25) (28) (31) (34) (37) of the mounting brackets (21) (24) (27) (30) (33) (36) are spaces inside thereof. The shape is not particularly limited as long as the support beam is inserted into the support beam and can be fitted onto the support beam. That is, the fitting portions (22), (25), (28), (31), (34), and (37) of the mounting bracket do not separate (do not come off) outward in the state of being fitted on the support beam. If it is a shape, it will not specifically limit. For example, the fitting portions (22), (25), (28), (31), (34), and (37) of the mounting bracket may be formed in a cylindrical shape having an elliptical cross section as in the above embodiment. Or the opening part may be provided in a part of circumferential direction of the fitting part (22) (25) (28) (31) (34) (37) of a bracket.

  Note that the fitting portions (22), (25), (28), (31) of the mounting brackets (21), (24), (27), (30), (33), and (36) are attached to the support beams (1) and (2). ) (34) When the (37) is externally fitted, the clearance (gap between the support beam and the fitting portion) should be small, and the clearance is designed to be 0.2 to 0.3 mm. However, it is not particularly limited to such a range.

  The steering support beam according to the present invention is used by being laid between the left and right sides of a vehicle body such as an automobile.

It is a perspective view which shows the steering support beam which concerns on one Embodiment of this invention. It is an end view of the XX line in FIG. It is sectional drawing which shows the bracket arrangement | positioning process in the 1st manufacturing method using the fluid pressure which concerns on this invention. It is sectional drawing which shows the pressing element arrangement | positioning process in the 1st manufacturing method using the fluid pressure which concerns on this invention. It is sectional drawing which shows the fluid pressure load process (state which added fluid pressure) in the 1st manufacturing method using the fluid pressure which concerns on this invention. It is explanatory drawing which shows the other example of the 1st manufacturing method using the fluid pressure concerning this invention, (a) shows the state before pressurization, (b) shows the state at the time of pressurization, respectively. It is explanatory drawing which shows an example of the 2nd manufacturing method using the elastic member which concerns on this invention, (a) shows the state before pressurization, (b) shows the state at the time of pressurization, respectively. It is explanatory drawing which shows an example of the 3rd manufacturing method using the electromagnetic shaping | molding based on this invention, (a) shows the state before pressurization, (b) shows the state at the time of pressurization, respectively. It is a figure which shows the modification of the attachment aspect to the vehicle floor surface of the steering support beam of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... 1st support beam 2 ... 2nd support beam 3 ... Connection member 4 ... 1st cylindrical part 5 ... 2nd cylindrical part 6 ... Connection plate part 7 ... Communication hole 8 ... Receiving recessed part 9 ... Receiving recessed part 10 ... Steering Support beam 11 ... expanded diameter part 12-18 ... expanded diameter part 19 ... center stay (elongated fixed protruding piece)
21 ... Mounting side bracket 22 ... Fitting part 24 ... Mounting side bracket 25 ... Fitting part 27 ... Column mounting bracket 28 ... Fitting part 30 ... Airbag unit mounting bracket 31 ... Fitting part 33 ... Audio mounting Bracket 34 ... Fitting portion 36 ... Glove box mounting bracket 37 ... Fitting portion 40 ... Fixing protrusion 51-59 ... Presser 66 ... Elastic member 70 ... Coil 80 ... Elastic tube material (cylindrical elastic member)

Claims (20)

A cylindrical first support beam;
A second support beam having a diameter larger than that of the first support beam;
A first cylindrical portion that can be fitted with the first support beam and a connecting member that has a second cylindrical portion that can be fitted with the second support beam;
A receiving recess is formed on the inner peripheral surface of the first cylindrical portion, and a receiving recess is formed on the inner peripheral surface of the second cylindrical portion,
An end portion of the first support beam is inserted and fitted into the first tubular portion of the connecting member, and a part of the inserted and fitted first support beam end portion is expanded in diameter. The diameter portion enters into the receiving recess on the inner peripheral surface of the first cylindrical portion and is locked,
An end portion of the second support beam is inserted and fitted into the second cylindrical portion of the connecting member, and a part of the inserted and fitted second support beam end portion is expanded in diameter. The first support beam and the second support beam are connected and fixed via a connecting member by the diameter portion entering and engaging with the receiving recess on the inner peripheral surface of the second cylindrical portion. A steering support beam characterized by   2. The steering support according to claim 1, wherein a diameter-enlarged portion is formed by expanding the diameters of both sides of the attachment position of the connecting member in the both support beams, and the connecting member is sandwiched and fixed by the enlarged-diameter portion. beam.   One or a plurality of mounting bracket fitting portions are externally fitted to at least one of the support beams, and the diameters of the peripheral portions on both sides of the bracket fitting portion mounting position in the support beam are expanded. In this way, an enlarged diameter portion is formed, and the fitting bracket is fixed to the support beam by the fitting portion of the mounting bracket being sandwiched by the enlarged diameter portions in the peripheral portions on both sides thereof. Item 3. The steering support beam according to Item 1 or 2.   4. The connection member according to claim 1, wherein the connection member is formed by connecting the first tubular portion and the second tubular portion with a connection plate portion, and a communication hole is formed in the connection plate portion. The steering support beam according to item 1.   The steering according to any one of claims 1 to 4, wherein the receiving recess is formed along a circumferential direction of an inner peripheral surface of the first cylindrical portion and / or an inner peripheral surface of the second cylindrical portion. Support beam.   The steering support beam according to any one of claims 1 to 5, wherein the connecting member includes a fixing protruding piece for fixing to a vehicle body bottom portion or the like.   A cylindrical first support beam is formed on the first cylindrical portion of the connecting member having a first cylindrical portion having a receiving concave portion formed on the inner peripheral surface and a second cylindrical portion having a receiving concave portion formed on the inner peripheral surface. And inserting one end of the cylindrical second support beam into the second cylindrical portion of the connecting member, and further pressing the outer peripheral surfaces of the two support beams with a pressing tool and In a state where the other end portion of the first support beam and the other end portion of the second support beam are sealed, a fluid is sealed inside the both support beams and a predetermined pressure is applied to the fluid, thereby the connection. A part of both support beam ends inserted and fitted in the member is expanded in diameter to form an expanded diameter part, and the expanded diameter part is allowed to enter the receiving recesses on the inner peripheral surfaces of the cylindrical parts. A method for manufacturing a steering support beam, wherein the steering support beam is locked.   A cylindrical first support beam is formed on the first cylindrical portion of the connecting member having a first cylindrical portion having a receiving concave portion formed on the inner peripheral surface and a second cylindrical portion having a receiving concave portion formed on the inner peripheral surface. And inserting and fitting one end portion of the cylindrical second support beam into the second cylindrical portion of the connecting member, and further attaching both ends of the connecting member on the outer peripheral surface of the both support beams. While holding the remaining part except the peripheral part with a pressing tool and sealing the other end part of the first support beam and the other end part of the second support beam, a fluid is sealed inside the both support beams. By applying a predetermined pressure to the fluid, a part of both support beam ends inserted and fitted in the connecting member is expanded to form an expanded diameter part, and the expanded diameter part is Intruding into the receiving recess on the inner peripheral surface of the cylindrical part and locking it, Serial manufacturing method for steering support beam, characterized in that securing sandwiching the connecting member by the enlarged diameter portion of both sides brought diameter on both sides periphery of the mounting position of the coupling member in both support beams.   A cylindrical first support beam is formed on the first cylindrical portion of the connecting member having a first cylindrical portion having a receiving concave portion formed on the inner peripheral surface and a second cylindrical portion having a receiving concave portion formed on the inner peripheral surface. And inserting one end of a cylindrical second support beam into the second cylindrical portion of the connecting member, and one or more of the first support beam and / or the second support beam. The fitting parts of the mounting brackets are externally fitted, and further, the remaining parts of the outer peripheral surfaces of the support beams except the peripheral parts on both sides of the connecting member and the peripheral parts on both sides of the mounting bracket fitting part are pressed with a pressing tool. And sealing the other end of the first support beam and the other end of the second support beam and enclosing a fluid inside the both support beams and applying a predetermined pressure to the fluid. , Inserted into the connecting member A portion of both support beam ends is enlarged to form a diameter-expanded portion, the diameter-increased portion is inserted into the receiving recesses on the inner peripheral surfaces of the cylindrical portions and locked; The support member mounting positions on both support beams are enlarged on both sides, and the connecting member is sandwiched and fixed by the enlarged parts on both sides, and the support bracket fitting parts on both support beams are mounted on both sides of the mounting position. A method for manufacturing a steering support beam, characterized in that the mounting bracket fitting portion is sandwiched and fixed by expanding the diameter of the portion and the expanded diameter portions on both sides.   The said connection member consists of what connected the said 1st cylindrical part and the said 2nd cylindrical part by the connection plate part, The communication hole is formed in this connection plate part. 2. A method for manufacturing a steering support beam according to item 1.   The cylindrical elastic member is arranged so as to be along the inner peripheral surfaces of the both support beams, a fluid is sealed inside the both support beams, and a predetermined pressure is applied to the fluid. The manufacturing method of the steering support beam of any one of Claims.   A cylindrical first support beam is formed on the first cylindrical portion of the connecting member having a first cylindrical portion having a receiving concave portion formed on the inner peripheral surface and a second cylindrical portion having a receiving concave portion formed on the inner peripheral surface. And inserting one end of the cylindrical second support beam into the second cylindrical portion of the connecting member, and further pressing the outer peripheral surfaces of the two support beams with a pressing tool and In a state where the other end portion of the first support beam and the other end portion of the second support beam are sealed, an elastic member is sealed inside the both support beams and a predetermined pressure is applied to the elastic member, A part of both support beam ends inserted and fitted in the connecting member is enlarged to form an enlarged diameter part, and the enlarged diameter part enters the receiving recess on the inner peripheral surface of the cylindrical parts. A method of manufacturing a steering support beam, wherein the steering support beam is locked.   A cylindrical first support beam is formed on the first cylindrical portion of the connecting member having a first cylindrical portion having a receiving concave portion formed on the inner peripheral surface and a second cylindrical portion having a receiving concave portion formed on the inner peripheral surface. And inserting and fitting one end portion of the cylindrical second support beam into the second cylindrical portion of the connecting member, and further attaching both ends of the connecting member on the outer peripheral surface of the both support beams. An elastic member is sealed inside the both support beams in a state where the remaining portions except the peripheral portion are pressed by a pressing member and the other end portion of the first support beam and the other end portion of the second support beam are sealed. By applying a predetermined pressure to the elastic member, a part of both end portions of the support beam inserted and fitted into the connecting member is expanded to form an expanded diameter portion. Entry into the receiving recess on the inner peripheral surface of both the cylindrical parts and locking Both manufacturing method of steering support beam, characterized in that said fixing sandwiching the connecting member by the enlarged diameter portion of both sides brought diameter on both sides periphery of the mounting position of the coupling member in both support beams.   A cylindrical first support beam is formed on the first cylindrical portion of the connecting member having a first cylindrical portion having a receiving concave portion formed on the inner peripheral surface and a second cylindrical portion having a receiving concave portion formed on the inner peripheral surface. And inserting one end of a cylindrical second support beam into the second cylindrical portion of the connecting member, and one or more of the first support beam and / or the second support beam. The fitting parts of the mounting brackets are externally fitted, and further, the remaining parts of the outer peripheral surfaces of the support beams except the peripheral parts on both sides of the connecting member and the peripheral parts on both sides of the mounting bracket fitting part are pressed with a pressing tool. In addition, with the other end portion of the first support beam and the other end portion of the second support beam sealed, an elastic member is sealed inside the both support beams and a predetermined pressure is applied to the elastic member. In the connecting member A part of both support beam ends fitted into and fitted to each other is enlarged to form an enlarged diameter part, and the enlarged diameter part is inserted into the receiving recesses on the inner peripheral surfaces of the cylindrical parts and locked. In addition, the peripheral portions on both sides of the attachment positions of the connecting members in the both support beams are enlarged, and the connecting members are sandwiched and fixed by the enlarged portions on both sides, and the attachment positions of the mounting bracket fitting portions in the both support beams A method for manufacturing a steering support beam, comprising expanding the diameters of the peripheral portions on both sides and sandwiching and fixing the mounting bracket fitting portions by the expanded diameter portions on both sides.   The method for manufacturing a steering support beam according to claim 12, wherein hard rubber is used as the elastic member.   A cylindrical first support beam is formed on the first cylindrical portion of the connecting member having a first cylindrical portion having a receiving concave portion formed on the inner peripheral surface and a second cylindrical portion having a receiving concave portion formed on the inner peripheral surface. And inserting and fitting one end of the second support beam into the second tubular portion of the connecting member, and further pressing the outer peripheral surfaces of the two support beams with a presser. By arranging an electromagnetic forming coil inside the both support beams and energizing the coil, a part of both support beam end portions inserted and fitted in the connecting member is expanded to expand the diameter expanding portion. And manufacturing the steering support beam, wherein the enlarged diameter portion is inserted into the receiving recesses on the inner peripheral surfaces of the cylindrical portions.   A cylindrical first support beam is formed on the first cylindrical portion of the connecting member having a first cylindrical portion having a receiving concave portion formed on the inner peripheral surface and a second cylindrical portion having a receiving concave portion formed on the inner peripheral surface. And inserting and fitting one end portion of the cylindrical second support beam into the second cylindrical portion of the connecting member, and further attaching both ends of the connecting member on the outer peripheral surface of the both support beams. In a state where the remaining portion excluding the peripheral portion is pressed by a pressing tool, an electromagnetic forming coil is arranged inside the both support beams and the coil is energized, whereby both the insertion members fitted into the connecting member are fitted. A part of the support beam end portion is enlarged to form an enlarged diameter portion, and the enlarged diameter portion is intruded into the receiving recesses on the inner peripheral surfaces of the cylindrical portions, and the both support beams are locked. Enlarge the diameter of the surrounding area on both sides of the mounting position of the connecting member. Method of manufacturing a steering support beam, characterized in that securing sandwiching the connecting member by the enlarged diameter portion of the Luo sides.   A cylindrical first support beam is formed on the first cylindrical portion of the connecting member having a first cylindrical portion having a receiving concave portion formed on the inner peripheral surface and a second cylindrical portion having a receiving concave portion formed on the inner peripheral surface. And inserting one end of a cylindrical second support beam into the second cylindrical portion of the connecting member, and one or more of the first support beam and / or the second support beam. The fitting parts of the mounting brackets are externally fitted, and the remaining parts excluding the peripheral parts on both sides of the connecting member and the peripheral parts on both sides of the mounting bracket fitting part on the outer peripheral surfaces of the support beams are pressed with a pressing tool. In this state, by placing an electromagnetic forming coil inside the both support beams and energizing the coils, a part of both support beam end portions inserted and fitted in the connecting member is expanded. Form an enlarged diameter part, and forward the enlarged diameter part The connecting members are inserted into and locked into the receiving recesses on the inner peripheral surfaces of both cylindrical portions, and the peripheral portions on both sides of the mounting positions of the connecting members in the both support beams are expanded to increase the connecting members by the expanded portions on both sides. The mounting bracket fitting portion is sandwiched and fixed by the enlarged portions on both sides of the both support beams so that the peripheral portions on both sides of the mounting position of the mounting bracket fitting portion are enlarged. To manufacture a steering support beam.   The method for manufacturing a steering support beam according to any one of claims 16 to 18, wherein the electromagnetic forming coil is disposed in a position adjacent to an inner peripheral surface of the support beam in an internal space of the both support beams.   A steering support beam manufactured by the manufacturing method according to claim 7.

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