JP7180871B2 - Joint structure - Google Patents

Description

The present invention relates to joint structures.

Patent Literature 1 listed below discloses an invention relating to a chassis frame. In the present invention, when a plurality of pipes (pipes) are connected via a joint portion, and the fitting portion and the pipe are connected by a plurality of ribs provided in the fitting portion of the joint portion to the pipe. It is possible to suppress the occurrence of resistance in

JP 2011-213312 A

However, in the prior art described in Patent Document 1, the pipe and the joint are fixed with an adhesive, and it is necessary to wait for the adhesive to harden in order to complete the work of fixing the pipe and the joint. be.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a joint structure that simplifies the work of fixing a pipe member and a joint portion in consideration of the above facts.

A joint structure according to a first aspect includes an elastically deformable cylindrical pipe member, an object to be connected to the pipe member in a cylindrical or rod shape, and an end portion of the connection object that is provided at an end of the pipe member and the pipe member. a joint part capable of being connected to an object to be connected, wherein the tip part of the joint part can be inserted into the pipe material or the pipe material can be inserted, and when the pipe material and the joint part are connected, When the pipe member is relatively moved toward the joint portion, the pipe member can be pressed to displace a part of the pipe member so as to approach the axial center side of the pipe member when viewed from the longitudinal direction of the pipe member. and an entry permitting portion into which a portion that is displaced toward the joint portion due to the displacement of the tubular member can enter.

According to the joint structure according to the first aspect, the elastically deformable cylindrical pipe member and the cylindrical or rod-shaped connecting object of the pipe member are connected to the joint provided at the end of the connecting object. can be connected in parts.

The joint part has a tip part that can be inserted into the pipe material or that can be inserted into the pipe material, and has a projection part. When the pipe member and the joint portion are connected to each other, the projection portion presses the pipe member when the pipe member is relatively moved toward the joint portion, thereby causing a portion of the pipe member to be displaced when viewed from the longitudinal direction of the pipe member. can be displaced so as to approach the axial center side of the pipe member.

Therefore, in this aspect, the restoring force of the pipe member can be used to maintain the connected state between the pipe member and the joint portion.

By the way, when a part of the pipe material is displaced so as to approach the axial center side of the pipe material when viewed from the longitudinal direction of the pipe material, a portion is generated in the pipe material that is displaced toward the joint portion due to the displacement. It is conceivable that the elastic deformation of the pipe material is hindered by the deformation of the pipe being hindered by the joint portion.

Here, in this aspect, the joint portion is provided with an entry-permitting portion, and the portion of the pipe that is displaced toward the joint portion enters the entry-permitting portion, so that deformation of the pipe due to the protrusion is inhibited by the joint. can be suppressed. As a result, the joint portion and the pipe member can be connected only by relative movement of the pipe member toward the joint portion side.

A joint structure according to a second aspect is the joint structure according to the first aspect, wherein the connecting object can support an end face of the pipe on the joint portion side in a state where the pipe and the connecting object are connected. It has good support.

According to the joint structure according to the second aspect, the object to be connected has the support portion, and in the state where the pipe member and the object to be connected are connected, the end surface of the pipe member on the side of the joint portion is supported by the support portion. be. Therefore, the force acting on the pipe member in the longitudinal direction of the pipe member can be supported by the connecting object.

A joint structure according to a third aspect is the joint structure according to the first aspect or the second aspect, wherein the pipe member has a square tubular shape, and a tip end portion of the joint portion is connected to the pipe member of the joint portion. When viewed from the insertion direction of the pipe, the projection is rectangular to fit within the inner periphery of the pipe, and the protrusion is provided on one side of the joint in the first direction perpendicular to the insertion direction and the other side of the first direction. The entry permitting portion is provided adjacent to the projecting portion on one side in the first direction and the other side in the first direction in the joint portion. A first concave portion recessed toward the axial center side of the joint portion, and a second direction one side orthogonal to the insertion direction and the first direction in the joint portion and the axial center side provided on the second direction other side. and a second recess that is recessed into.

According to the joint structure according to the third aspect, the pipe member is in the shape of a square tube, and the distal end portion of the joint portion has a rectangular shape that fits within the inner circumference of the pipe member when viewed from the direction in which the joint portion is inserted into the pipe member. It is The projections are provided on one side and the other side of the joint in the first direction perpendicular to the insertion direction, and are capable of pressing the pipe member from the inner peripheral side of the pipe member. Therefore, when the pipe member is relatively moved toward the joint portion in a state in which the distal end portion of the joint portion is inserted into the pipe member, the projection portion presses the inner peripheral side of the pipe member, and the pipe member moves toward the first direction one side and the pipe member. It elastically deforms so as to be expanded in the other side of the first direction.

By the way, since the circumferential length of the pipe when viewed from the insertion direction does not change even if the pipe is elastically deformed, the portion of the pipe into which the joint is inserted is is partially displaced toward the axis of the joint. In addition, it is conceivable that, in the portion of the pipe member into which the joint portion is inserted, the peripheral portion of the corner portion of the pipe member is also displaced toward the axis.

Here, in this aspect, the entry permitting portion is configured to include the first recess and the second recess, and the first recess is formed on the joint portion on one side in the first direction and on the other side in the first direction. It is provided adjacently and recessed toward the shaft center of the joint portion. On the other hand, the second recessed portions are provided on one side in the second direction and the other side in the second direction in the joint portion, and are recessed toward the axial center side of the joint portion. Therefore, the portion of the pipe member that is displaced toward the axial center of the joint portion when the pipe member is pressed against the protrusion can be accommodated in the first concave portion and the second concave portion. As a result, it is possible to prevent the elastic deformation of the pipe member from being hindered by the joint portion when the joint portion is inserted into the pipe member.

A joint structure according to a fourth aspect is the joint structure according to the first aspect or the second aspect, wherein the pipe member is cylindrical, and a tip end portion of the joint portion is connected to the pipe member of the joint portion. It has a circular shape that fits within the inner periphery of the pipe material when viewed from the insertion direction, and the major diameter of the central portion of the joint portion on the center side of the insertion direction is longer than the diameter of the tip portion when viewed from the insertion direction. The projection has an elliptical shape with a long minor axis shorter than the diameter, and the protrusion includes a top part on one side in the major axis direction and the other side in the major axis direction in the central part, The tubular member can be pressed from the inner peripheral side, and the entry permitting portion includes a portion on the one side in the minor axis direction and a portion on the other side in the minor axis direction in the central portion.

According to the joint structure according to the fourth aspect, the pipe member is cylindrical, and the distal end portion of the joint portion has a circular shape that fits within the inner periphery of the pipe member when viewed from the direction in which the joint portion is inserted into the pipe member. It is Further, the central portion of the joint portion on the center side in the insertion direction has an elliptical shape in which the major axis length is longer than the diameter of the distal end portion of the joint portion and the minor axis length is shorter than the diameter when viewed from the insertion direction. It is possible to press the tubular member from the inner peripheral side of the tubular member by the top portions on the one side in the major diameter direction and the other side in the major diameter direction at the central portion.

Therefore, when the pipe member is relatively moved toward the joint portion in a state in which the tip portion of the joint portion is inserted into the pipe member, the inner peripheral side of the pipe member is pressed by the top portion of the joint portion, and the pipe member is moved to the one side in the longitudinal direction. And it will be elastically deformed so that it may expand to the other side of a long-diameter direction.

By the way, since the circumferential length of the pipe when viewed from the insertion direction does not change even if the pipe is elastically deformed, the portion of the pipe into which the joint is inserted is partially aligned with the axis of the joint in the direction of the minor diameter. It will be displaced to the heart side.

Here, in this aspect, the portion on the one side in the minor axis direction and the portion on the other side in the minor axis direction in the central portion of the joint portion are recessed toward the axial center side of the joint portion from the tip portion of the joint portion. For this reason, the portion of the pipe that is displaced toward the axial center of the joint when the pipe is pressed against the top of the joint is placed on one side in the minor diameter direction and the other side in the minor diameter direction of the central portion of the joint. can be done. As a result, it is possible to prevent the elastic deformation of the pipe member from being hindered by the joint portion when the joint portion is inserted into the pipe member.

A joint structure according to a fifth aspect is the joint structure according to the first aspect or the second aspect, wherein the joint portion has a cylindrical shape into which the pipe material can be inserted, and the projection portion is a portion of the joint portion. Provided on the inner peripheral surface on one side in the first direction orthogonal to the direction of insertion of the pipe into the joint portion and on the other side in the first direction, the pipe can be pressed from the outer peripheral side of the pipe. The entry permitting portion is provided at a portion on one side in a second direction orthogonal to the insertion direction and the first direction in the inner peripheral surface and a portion on the other side in the second direction, and is provided on the shaft of the joint portion. It is made into a concave portion that is recessed on the side opposite to the core.

According to the joint structure according to the fifth aspect, the joint portion has a tubular shape into which the pipe member can be inserted, and the inner peripheral surface of the joint portion is provided with the protrusion and the recess. The protrusions are provided on the inner peripheral surface of the joint part on one side in the first direction perpendicular to the direction in which the pipe member is inserted into the joint part and on the other side in the first direction. It is possible to press from the outer peripheral side.

Therefore, when the pipe is inserted into the joint, if the pipe is relatively moved toward the joint, the outer peripheral side of the pipe is pressed by the projecting portion, and the pipe is partially displaced along its axis in the first direction. It is displaced so as to approach the heart side. In other words, when the pipe member is inserted into the joint portion, the pipe member is elastically deformed toward the axial center side of the pipe member in the first direction and collapsed.

By the way, since the circumferential length of the pipe when viewed from the insertion direction does not change even if the pipe is elastically deformed, the portion of the pipe that is inserted into the joint portion is oriented in the second direction orthogonal to the insertion direction and the first direction. It will be elastically deformed so that it expands to the side and the second direction other side.

Here, in this aspect, the recesses are provided in the portion on the one side in the second direction and the portion on the other side in the second direction in the inner peripheral surface of the joint portion, and are recessed on the side opposite to the axial center of the joint portion. Therefore, the portion of the tubular member that is displaced in the second direction when the tubular member is pressed against the protrusion can be accommodated in the recess. As a result, it is possible to prevent the elastic deformation of the pipe member from being hindered by the joint portion when the pipe member is inserted into the joint portion.

INDUSTRIAL APPLICABILITY As described above, the joint structure according to the present invention has the excellent effect of simplifying the fixing work between the pipe member and the joint portion.

It is an exploded view showing composition of joint structure concerning a 1st embodiment. It is a perspective view which shows the structure of the joint part of the joint structure which concerns on 1st Embodiment. FIG. 2 is a cross-sectional view showing the configuration of the joint portion of the joint structure according to the first embodiment, (A) showing a state cut along line 3A-3A in FIG. 1, and (B) showing 3B in FIG. It shows a state cut along the -3B line, and (C) shows a state cut along the 3C-3C line in FIG. It is a fragmentary sectional view showing composition of joint structure concerning a 1st embodiment. FIG. 5 is a cross-sectional view showing the configuration of the joint structure according to the first embodiment (a cross-sectional view showing a state cut along line 5-5 in FIG. 4). BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the structure of the vehicle body to which the joint structure which concerns on 1st Embodiment was applied. It is a perspective view which shows the 1st modification of the joint part of the joint structure which concerns on 1st Embodiment. It is a perspective view which shows the 2nd modification of the joint part of the joint structure which concerns on 1st Embodiment. It is an exploded view showing composition of joint structure concerning a 2nd embodiment. FIG. 10 is a cross-sectional view showing the configuration of the joint portion of the joint structure according to the second embodiment, where (A) shows a state cut along line 10A-10A in FIG. 9, and (B) shows 10B in FIG. 9; 9 shows a state cut along the −10B line, and (C) shows a state cut along the 10C-10C line in FIG. FIG. 6 is a cross-sectional view (cross-sectional view corresponding to FIG. 5 ) showing the configuration of a joint structure according to a second embodiment; FIG. 11 is a cross-sectional view showing the configuration of a joint portion of a joint structure according to a third embodiment, where (A) shows a state cut along line 12A-12A in (B), and (B) shows (A). is cut along line 12B-12B of .

<First embodiment>
A schematic configuration of a vehicle body 10 to which a joint structure according to a first embodiment of the present invention is applied will be described below with reference to FIGS. 1 to 7. FIG. An arrow FR shown in each drawing indicates the front side of the vehicle body, an arrow UP indicates the upper side of the vehicle body, and an arrow RH indicates the right side in the width direction of the vehicle body.

As shown in FIG. 6, the vehicle body 10 has a bilaterally symmetrical structure, and thus the configuration of the vehicle body 10 will be described below while appropriately omitting similar components.

The vehicle body 10 includes a pair of front side members 12 , a pair of roof side rails 14 , a pair of lower side members 16 , a pair of front pillars 18 and a pair of center pillars 20 .

The front side member 12 constitutes a part of the front portion of the vehicle body 10 and extends in the front-rear direction of the vehicle body. The front end portions of the pair of front side members 12 are connected to each other by a bumper reinforcement (not shown) extending in the width direction of the vehicle body.

The roof side rail 14 constitutes a part of the upper portion of the vehicle body 10 and extends in the longitudinal direction of the vehicle body. A pair of roof side rails 14 are connected by a roof arch 22 extending in the width direction of the vehicle body.

The lower side member 16 constitutes a part of the lower portion of the vehicle body 10 and extends in the longitudinal direction of the vehicle body. The lower side members 16 are connected by a cross member 24 extending in the width direction of the vehicle body.

The front pillar 18 and the center pillar 20 each form part of the side portion of the vehicle body 10 and extend in the vertical direction of the vehicle body. A front pillar 18 connects a portion of the roof side rail 14 on the front side of the vehicle body and a portion of the lower side member 16 on the front side of the vehicle body. The center portion of the side member 16 in the longitudinal direction of the vehicle body is connected.

More specifically, the front pillar 18 comprises a front pillar upper 26 which constitutes the upper portion of the vehicle body and which extends downward from the roof side rail 14 toward the front of the vehicle body, and a front pillar upper portion 26 which constitutes the lower portion of the vehicle body and extends upwardly and downwardly of the vehicle body. and a front pillar lower 28 extending in the direction.

Here, the present embodiment is characterized in that the joint structure according to the present embodiment is applied to the connecting portions between the constituent elements of the vehicle body 10 described above. In the following, the joint structure according to the present embodiment will be described in detail, taking as an example the connecting portion between the front side member 12 and the lower side member 16 (the portion surrounded by the two-dot chain line in FIG. 6).

As shown in FIG. 1, the lower side member 16 is mainly composed of a square cylindrical "pipe member 30" made of an elastically deformable metal, such as an aluminum alloy. More specifically, the tubular member 30 has a square frame shape when viewed from its extending direction, and the distance between the opposing inner peripheral surfaces is set to H1 on the inner peripheral side.

On the other hand, the front side member 12 is formed by extruding an aluminum alloy. It has

As also shown in FIG. 2, the front side member-constituting portion 32 is configured in a rectangular tubular shape having a plate-like "end portion 32A", and the front side member-constituting portion 32 and the A joint portion 34 is integrally provided. Hereinafter, the longitudinal direction of the joint portion 34 will be referred to as the X direction, the first direction perpendicular to the X direction will be referred to as the Y direction, and the second direction perpendicular to the X and Y directions will be referred to as the Z direction. . In each figure, an arrow X indicates the X direction, an arrow Y indicates the Y direction, and an arrow Z indicates the Z direction.

The joint portion 34 is solid and has a substantially rectangular parallelepiped shape as a whole. part 34B".

The joint main body portion 34A has a truncated quadrangular pyramid whose width is reduced from the one side in the X direction toward the central side in the X direction of the joint main body portion 34A on the "tip end portion 34A1" side (one side in the X direction). , the portion on the base end portion 34A2 side (the other side in the X direction) has a truncated quadrangular pyramid shape whose width is reduced from the other side in the X direction toward the center side in the X direction of the joint main body portion 34A.

Also, as shown in FIG. 3C, the tip portion 34A1 of the joint main body portion 34A has a square shape when viewed from one side in the X direction. Both are set to H2. Note that the dimension H2 is set to a value smaller by 1 [mm] to 5 [mm] than the distance H1 described above, and the tip portion 34A1 of the joint main body portion 34A can be inserted into the inner peripheral side of the pipe member 30. ing.

On the other hand, the proximal end portion 34A2 of the joint main body portion 34A has a square shape when viewed from the other side in the X direction, as also shown in FIG. , are both set to H4. Note that the dimension H4 is set to a value equivalent to the dimension H2 described above or a value larger than the dimension H2 by 1 [mm] to 5 [mm].

Further, as shown in FIG. 3B, a side surface portion 34A3 on one side in the Y direction and a side surface portion 34A4 on the other side in the Y direction of the joint main body portion 34A extend toward the center side in the X direction of the joint main body portion 34A. It is said to be downward sloping. In other words, it can be considered that the side surfaces 34A3 and 34A4 of the joint main body 34A are provided with "first recesses 36" serving as entry-permitting portions recessed toward the axial center G of the joint 34, respectively.

On the other hand, a side portion 34A5 on one side in the Z direction and a side portion 34A6 on the other side in the Z direction of the joint main body portion 34A are also sloped downward toward the center side in the X direction of the joint main body portion 34A. In other words, it can be considered that the side surfaces 34A5 and 34A6 of the joint main body 34A are provided with the "second recesses 38" serving as entry-permitting portions recessed toward the axis G of the joint 34, respectively.

The projecting portion 34B is provided on each of the side portions 34A3 and 34A4 so as to protrude on the side opposite to the axis G. As shown in FIG. In other words, the protrusion 34B is provided adjacent to the first recess 36 . In addition, the surface portion 34B1 extending in the X direction and the Z direction when viewed from the Y direction of the projecting portion 34B has a peripheral edge portion on one side in the X direction that coincides with the peripheral edge portion of the tip portion 34A1 of the joint main body portion 34A. The peripheral edge portion on the other side in the X direction coincides with the peripheral edge portion of the base end portion 34A2 of the joint body portion 34A.

In addition, the surface portion 34B1 is inclined upward toward the center of the joint body portion 34A in the X direction, and the dimension of the joint portion 34 in the Y direction is It gradually increases toward the center in the X direction, and gradually decreases toward the base end portion 34A2 of the joint body 34A from the center in the X direction of the joint body 34A. The distance H3 between the tops of the protrusions 34B is set to a value that is 1 [mm] to 5 [mm] larger than the distance H1.

In this embodiment, the front side member 12 and the pipe member 30 are connected by inserting the joint portion 34 configured as described above into the pipe member 30 . The front side member 12 and the tubular member 30 are connected via a joint portion 34 and then joined at a joint portion (not shown) by welding or the like.

Moreover, as shown in FIG. 4, the projecting portion 34B is in the process of relatively moving the pipe member 30 in the X direction toward the joint portion 34 (the process of inserting the joint portion 34 into the pipe member 30 in the X direction). ), the tubular member 30 can be expanded in the Y direction by pressing the tubular member 30 from the inner peripheral side. Thus, when the joint portion 34 is connected to the pipe member 30 , the restoring force of the pipe member 30 in the Y direction acts on the axial center G side of the joint portion 34 .

As shown in FIG. 3A, the end portion 32A of the front side member forming portion 32 has a square shape when viewed from one side in the X direction. are both set to H5. In addition, the dimension H5 is set to a value larger than the distance H1 described above, and in a state in which the joint portion 34 is accommodated on the inner peripheral side of the pipe member 30, the end portion 32A is located on the joint portion 34 side of the pipe member 30. It functions as a support part capable of supporting the end face.

(Action and effect of the present embodiment)
Next, the operation and effects of this embodiment will be described.

In this embodiment, as shown in FIG. 1, an elastically deformable tubular member 30 and a cylindrical front side member forming portion 32 are provided at an end portion 32A of the front side member forming portion 32. can be connected at a joint portion 34 that is provided.

The joint portion 34 has a tip portion 34A1 that can be inserted into the pipe member 30, and has a projection portion 34B. As shown in FIG. 5, when the pipe member 30 and the joint portion 34 are connected to each other, the projection portion 34B presses the pipe member 30 and pushes the pipe member 30 when the pipe member 30 is relatively moved toward the joint portion 34 . A part of the tubular member 30 can be displaced so as to approach the axial center I side of the tubular member 30 when viewed from the longitudinal direction (X direction). Therefore, in this embodiment, the restoring force of the pipe member 30 can be used to maintain the connection state between the pipe member 30 and the joint portion 34 .

By the way, when a part of the pipe member 30 is displaced so as to approach the axial center I side of the pipe member 30 when viewed from the longitudinal direction of the pipe member 30, a portion of the pipe member 30 is displaced toward the joint portion 34 side due to the displacement. It is conceivable that elastic deformation of the pipe member 30 is prevented by the joint portion 34 inhibiting the deformation of the relevant portion.

Here, in the present embodiment, the joint portion 34 is provided with the first concave portion 36 and the second concave portion 38 , and the portion of the pipe member 30 that is displaced toward the joint portion 34 enters the first concave portion 36 and the second concave portion 38 . By doing so, it is possible to suppress the joint portion 34 from hindering the deformation of the pipe member 30 by the projection portion 34B. As a result, the joint portion 34 and the pipe member 30 can be connected only by relative movement of the pipe member 30 toward the joint portion 34 side. Therefore, in this embodiment, the work of fixing the pipe member 30 and the joint portion 34 can be simplified.

More specifically, in the present embodiment, the pipe member 30 is shaped like a square tube, and the distal end portion 34A1 of the joint portion 34 is aligned with the pipe member 30 when viewed from the direction in which the joint portion 34 is inserted into the pipe member 30 (the X direction). It has a rectangular shape that fits within the inner periphery. The projecting portions 34B are provided on one Y-direction side and the other Y-direction side of the joint portion 34, and are capable of pressing the pipe member 30 from the inner peripheral side of the pipe member 30. As shown in FIG. Therefore, when the pipe member 30 is relatively moved toward the joint portion 34 in a state where the distal end portion 34A1 of the joint portion 34 is inserted into the pipe member 30, the inner peripheral side of the pipe member 30 is pressed by the projection portion 34B, and the pipe member 30 is pushed. is elastically deformed so as to be expanded in one Y-direction side and the other Y-direction side.

By the way, since the circumferential length of the pipe member 30 as viewed in the X direction does not change even if the pipe member 30 is elastically deformed, the portion of the pipe member 30 into which the joint portion 34 is inserted is a part of the joint portion in the Z direction. 34 to the axis G side. In addition, it is conceivable that the periphery of the corner portion of the pipe member 30 is also displaced toward the axis G at the portion of the pipe member 30 into which the joint portion 34 is inserted.

Here, in the present embodiment, the first recesses 36 are provided adjacent to the projecting portion 34B on one Y-direction side and the other Y-direction side of the joint portion 34, and are recessed toward the axial center G side of the joint portion 34. . On the other hand, the second recesses 38 are provided on one Z-direction side and the other Z-direction side of the joint portion 34 and are recessed on the axis G side. Therefore, the portion of the tubular member 30 that is displaced toward the axis G when the tubular member 30 is pressed against the projecting portion 34B can be accommodated in the first concave portion 36 and the second concave portion 38 . As a result, it is possible to prevent elastic deformation of the pipe member 30 from being hindered by the joint portion 34 when the joint portion 34 is inserted into the pipe member 30 .

Further, in the present embodiment, the end surface of the pipe member 30 on the side of the joint portion 34 is supported by the end portion 32A of the front side member forming portion 32 when the pipe member 30 and the front side member forming portion 32 are connected. Therefore, the force acting on the tubular material 30 in the X direction can be supported by the front side member forming portion 32 .

<First Modification of First Embodiment>
In this embodiment, as shown in FIG. 7, the joint portion 34 may be tubular. With such a configuration, the joint portion 34 can be manufactured not only by extrusion molding but also by various molding methods.

<Second Modification of First Embodiment>
In the present embodiment, as shown in FIG. 8, the joint portion 34 may be configured by a plurality of plate members 40 and 42 that are separate members from the front side member-constituting portion 32 .

Specifically, the plate member 40 has a substantially V-shaped peripheral edge portion extending in the longitudinal direction that protrudes outward in the width direction. A plurality of sheets (two sheets as an example) are arranged in the direction.

On the other hand, the plate member 42 has a substantially V-shaped peripheral edge portion extending in the longitudinal direction that protrudes inward in the width direction. A sheet (two sheets as an example) is arranged. The plate member 40 and the plate member 42 are joined to each other at a joint portion (not shown) by welding or the like in a state where the slit portions (not shown) are fitted to form a lattice when viewed from the X direction. , are joined to the front side member forming portion 32 at a joining portion (not shown) by welding or the like.

According to such a configuration, the weight of the joint portion 34 can be reduced as compared with a configuration in which the joint portion 34 is solid.

<Second embodiment>
The configuration of the joint structure according to the second embodiment of the present invention will be described below with reference to FIGS. 9 to 11. FIG. In addition, the same numbers are attached to the same configuration parts as in the above-described first embodiment, and the description thereof is omitted.

Although the joint structure according to the present embodiment is also applied to the connecting portion between the front side member 12 and the lower side member 16 in the same manner as in the above-described first embodiment, the main portion of the lower side member 16 is a "pipe member". 50" is cylindrical, which is different from the first embodiment.

Specifically, as shown in FIG. 9, the pipe member 50 is made of an aluminum alloy and has a circular frame shape when viewed in its extending direction. is set.

On the other hand, the front side member 12 is formed by extruding an aluminum alloy. It has

The front side member-constituting portion 52 is configured in a cylindrical shape having a plate-shaped “end portion 52A” as a support portion, and the end portion 52A has a solid joint integrated with the front side member-constituting portion 52. A portion 54 is provided.

10, the cross-sectional shape of the joint portion 54 gradually changes in the X direction, and the cross-sectional shape of the portion on the "tip end portion 54A" side (one side in the X direction) is circular (perfectly circular). The cross-sectional shape of the “central portion 54B” on the center side in the X direction is elliptical, and the cross-sectional shape of the base end portion 54C side (the other side in the X direction) is circular (perfect circle). ing.

More specifically, as shown in FIG. 10C, the distal end portion 54A of the joint portion 54 has a cross-sectional diameter of D2 as viewed in the X direction. The diameter D2 is set to a value smaller by 1 [mm] to 5 [mm] than the diameter D1 described above, and the tip portion 54A of the joint portion 54 can be inserted into the inner peripheral side of the pipe member 50. there is

Further, as shown in FIG. 10B, the central portion 54B of the joint portion 54 has a major axis (dimension in the Y direction) set to D3 and a minor axis (dimension in the Z direction) in a cross section viewed from the X direction. ) is set to D4. The major axis D3 is set to a value 1 [mm] to 5 [mm] larger than the diameter D2, and the minor axis D4 is set to a value 1 [mm] to 5 [mm] smaller than the diameter D2. ing.

Further, as shown in FIG. 10A, the base end portion 54C of the joint portion 54 has a cross-sectional diameter of D5 as viewed in the X direction. The diameter D5 is set to a value equivalent to the diameter D2 described above or a value larger than the diameter D2 by 1 [mm] to 5 [mm].

In this embodiment, the front side member 12 and the pipe member 50 are connected by inserting the joint portion 54 configured as described above into the pipe member 50 . The front side member 12 and the tubular member 50 are connected via the joint portion 54 and then joined at a joint portion (not shown) by welding or the like.

Further, as shown in FIG. 11 , “top portions 54B1” on both sides in the Y direction (one side in the major diameter direction and the other side in the major diameter direction) of the center portion 54B of the joint portion 54 extend the pipe member 50 toward the joint portion 54 in the X direction. (the process of inserting the joint portion 54 into the pipe member 50 in the X direction), the pipe member 50 can be expanded in the Y direction by pressing the pipe member 50 from the inner peripheral side. That is, in the present embodiment, the top portion 54B1 functions as a protrusion that presses the pipe member 50. As shown in FIG. As a result, when the joint portion 54 is connected to the pipe member 50 , the restoring force of the pipe member 50 in the Y direction acts on the axial center H side of the joint portion 54 .

On the other hand, both sides of the central portion 54B in the Z direction (one side in the minor axis direction and the other side in the minor axis direction) are recessed toward the axis H side from the distal end portion 54A and the base end portion 54C, and function as an entry permitting portion. is doing.

Note that, as shown in FIG. 10A, the end portion 52A of the front side member forming portion 52 is circular (perfectly circular) when viewed from the X direction, and has a diameter of D6. In addition, the diameter D6 is set to a value larger than the diameter D1 described above, and in a state in which the joint portion 54 is accommodated on the inner peripheral side of the pipe member 50, the end portion 52A is located on the joint portion 54 side of the pipe member 50. The end face can be supported.

According to such a configuration, the tubular member 50 is cylindrical, and the distal end portion 54A of the joint portion 54 is circular so as to fit within the inner periphery of the tubular member 50 when viewed from the X direction. In addition, the center portion 54B on the center side in the X direction of the joint portion 54 is an ellipse in which the major axis D3 is longer than the diameter D2 of the tip portion 54A and the minor axis D4 is shorter than the diameter D2 when viewed from the X direction. The tube member 50 can be pressed from the inner peripheral side of the tube member 50 by the top portions 54B1 on both sides in the Y direction of the central portion 54B.

Therefore, when the tip portion 54A of the joint portion 54 is inserted into the pipe member 50 and the pipe member 50 is relatively moved toward the joint portion 54, the inner peripheral side of the pipe member 50 is pressed by the top portion 54B1 of the joint portion 54. , the tubular material 50 is elastically deformed so as to be expanded in one Y-direction side and the other Y-direction side.

By the way, since the circumferential length of the pipe member 50 viewed from the X direction does not change even if the pipe member 50 is elastically deformed, the portion of the pipe member 50 into which the joint portion 54 is inserted is is partially displaced toward the axial center H side of the joint portion 54 .

Here, in the present embodiment, the portions on both sides in the Z direction of the central portion 54B of the joint portion 54 are recessed toward the axial center H side of the joint portion 54 from the tip portion 54A of the joint portion 54 . Therefore, the portion of the pipe member 50 that is displaced toward the axis H when the pipe member 50 is pressed against the top portion 54B1 of the joint portion 54 can be accommodated on both sides of the central portion 54B in the Z direction. As a result, it is possible to prevent elastic deformation of the pipe member 50 from being hindered by the joint portion 54 when the joint portion 54 is inserted into the pipe member 50 .

<Third Embodiment>
The configuration of the joint structure according to the third embodiment of the present invention will be described below with reference to FIG. 12 . In addition, the same numbers are attached to the same configuration parts as in the above-described first embodiment, and the description thereof is omitted.

Although the joint structure according to the present embodiment is also applied to the connecting portion between the front side member 12 and the lower side member 16 in the same manner as in the above-described first embodiment, the body 10 is made of thermoplastic carbon fiber reinforced plastic that is elastically deformable. It is different from the first embodiment in that the "joint portion 60" is cylindrical.

Specifically, the joint portion 60 is provided integrally with the front side member forming portion 32 at the end portion 32A of the front side member forming portion 32, and has a substantially rectangular tubular shape into which the pipe member 30 can be inserted.

Further, as shown in FIG. 12(A), the inner peripheral surface of the joint portion 60 has a portion on the one side in the Y direction and a portion on the other side in the Y direction that protrude toward the axial center K side of the joint portion 60. A "protrusion 60A" having the same configuration as the protrusion 34B is also provided.

On the other hand, as shown in FIG. 12(B), on the inner peripheral surface of the joint portion 60, a part on one side in the Z direction and a part on the other side in the Z direction are provided as entry-permitting portions recessed on the side opposite to the axis K. is provided with a "recess 62".

In this embodiment, the front side member 12 and the pipe member 30 are connected by inserting the pipe member 30 into the joint portion 60 . Note that the front side member 12 and the pipe member 30 are connected via the joint portion 34 and then joined at a joint portion (not shown) using an adhesive or the like.

In addition, in the process of inserting the pipe member 30 into the joint portion 60, the projection portion 60A can press the pipe member 30 from the outer peripheral side to crush the pipe member 30 in the Y direction. As a result, the restoring force of the pipe member 30 in the Y direction acts on the joint portion 60 when the pipe member 30 is connected to the joint portion 60 .

According to such a configuration, when the pipe member 30 is inserted into the joint portion 60, when the pipe member 30 is relatively moved toward the joint portion 60, the outer peripheral side of the pipe member 30 is pressed by the projecting portion 60A, and the pipe member 30 is moved. , in the Y direction, a portion thereof is displaced so as to approach the axis J side. In other words, when the pipe member 30 is inserted into the joint portion 60, the pipe member 30 is elastically deformed toward the axial center J of the pipe member 30 in the Y direction and collapsed.

By the way, since the circumferential length of the pipe member 30 viewed from the X direction does not change even if the pipe member 30 is elastically deformed, the portion of the pipe member 30 inserted into the joint portion 60 expands in one Z direction side and the other Z direction side. It will be elastically deformed as shown.

Here, in the present embodiment, the recesses 62 are provided on the inner peripheral surface of the joint portion 60 on one side in the Z direction and on the other side in the Z direction, and are recessed on the side opposite to the axis K of the joint portion 60. there is Therefore, the portion of the tubular member 30 that is displaced in the Z direction when the tubular member 30 is pressed against the protrusion 60</b>A can be accommodated in the concave portion 62 . As a result, it is possible to prevent elastic deformation of the pipe member 30 from being hindered by the joint portion 60 when the pipe member 30 is inserted into the joint portion 60 .

<Supplementary explanation of the above embodiment>
(1) In the embodiment described above, an example in which the joint structure is applied to the vehicle body 10 has been described, but the structure to which the joint structure described above can be applied is not limited to this. For example, it is also possible to apply the joint structure described above to the skeleton of a unit building.

(2) Also, the joint structures according to the above-described embodiments can be used in combination. That is, it is possible to apply joint structures according to different embodiments to a plurality of locations in one structure according to the configuration of the structure.

(3) Furthermore, in the above-described third embodiment, the front side member 12 is configured to have a cylindrical shape, but the present invention is not limited to this. For example, the constituent elements of the vehicle body 10 provided with joint portions may be configured in a rod shape according to the configuration of the vehicle body 10 or the like.

30 Tubing material 32 Front side member constituent part (connection object)
32A end (support)
34 joint portion 34A1 tip portion 34B projection portion 36 first concave portion (entry permitting portion)
38 Second concave portion (entry permitting portion)
50 Tubing material 52 Front side member constituent part (connection object)
52A support portion 54 joint portion 54A tip portion 54B center portion 54B1 top portion (protrusion portion)
60 joint part 60A projection part 62 recessed part (entry allowance part)

Claims (3)

an elastically deformable tubular tube;
a tube-shaped or rod-shaped object to be connected to the tube;
a joint part provided at an end of the object to be connected and capable of connecting the pipe member and the object to be connected;
with
The joint portion
The distal end portion can be inserted into the pipe material or can be inserted into the pipe material, and presses the pipe material when the pipe material is relatively moved toward the joint part when the pipe material and the joint part are connected. a projecting portion capable of displacing a portion of the tubular member so as to approach the axial center side of the tubular member when viewed from the longitudinal direction of the tubular member;
an entry permitting portion into which a portion that is displaced toward the joint portion due to the displacement of the tubular material can enter;
is composed of
The tube member has a square tubular shape,
The distal end portion of the joint portion has a rectangular shape that fits within the inner periphery of the pipe member when viewed from the direction in which the joint portion is inserted into the pipe member, and
The projecting portion is provided on one side of the joint portion in a first direction orthogonal to the insertion direction and the other side of the first direction so as to be able to press the tubular member from the inner peripheral side,
The entry-permitting portion includes a first concave portion provided adjacent to the projecting portion on one side in the first direction and the other side in the first direction in the joint portion and recessed toward the axial center side of the joint portion; a second concave portion provided on one side of the joint portion in a second direction orthogonal to the insertion direction and the first direction and on the other side of the second direction and recessed toward the axial center side;
joint structure. an elastically deformable tubular tube;
a tube-shaped or rod-shaped object to be connected to the tube;
a joint part provided at an end of the object to be connected and capable of connecting the pipe member and the object to be connected;
with
The joint portion
The distal end portion can be inserted into the pipe material or can be inserted into the pipe material, and presses the pipe material when the pipe material is relatively moved toward the joint part when the pipe material and the joint part are connected. a projecting portion capable of displacing a portion of the tubular member so as to approach the axial center side of the tubular member when viewed from the longitudinal direction of the tubular member;
an entry permitting portion into which a portion that is displaced toward the joint portion due to the displacement of the tubular material can enter;
is composed of
The joint portion has a cylindrical shape into which the pipe member can be inserted,
The projecting portion is provided on the inner peripheral surface of the joint portion on one side in a first direction orthogonal to the direction in which the pipe member is inserted into the joint portion, and on the other side portion in the first direction. It is possible to press from the outer peripheral side of the pipe material,
The entry permitting portion is provided at a portion on one side in a second direction perpendicular to the insertion direction and the first direction and a portion on the other side in the second direction of the inner peripheral surface, and is opposite to the axial center of the joint portion. It is considered as a recess recessed on the side,
joint structure. The object to be connected includes a support portion capable of supporting an end surface of the pipe member on the side of the joint portion in a state where the pipe member and the object to be connected are connected.
The joint structure according to claim 1 or 2 .

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