JP3464420B2 - Frame, side frame of body frame using this frame, and method of molding the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame in which a plurality of frame members each having a box-shaped cross section are adjacent to each other and integrally joined to each other, a side frame of a vehicle body frame using the frame, and a molding method thereof. It is about.

[0002]

2. Description of the Related Art A side frame which constitutes a front portion of a vehicle body frame of an automobile is usually constructed as follows.

That is, in a plan view of the vehicle body, the front frame forming the front part of the side frame extends linearly in the front-rear direction, and the rear frame forming the rear part of the side frame is rear of the front frame. The shape is formed so as to extend rearward from the end, and the extending end side is bent so as to be displaced inward in the width direction of the vehicle body.

Although the front frame and the rear frame have rectangular box-shaped cross sections, the front frame and the rear frame are different due to the difference in required strength due to the difference in vehicle component parts supported by each. The cross-sections have different shape dimensions.

Therefore, when molding the side frame, first, the front and rear frames are individually molded, and then the front end of the rear frame is welded to the rear end of the front frame. The binding is performed by.

[0006]

By the way, the welded joint portion of the front and rear frames is a portion where the strength tends to suddenly increase in the longitudinal direction thereof. Therefore, when the frame receives an external force, However, stress concentration may occur in the vicinity of the joint portion at the transition portion of the front and rear frames, which is not preferable in terms of frame strength.

The present invention has been made by paying attention to the above circumstances, and in addition to the case where the rear frame is bent with respect to the front frame in the longitudinal direction of the frame, or in addition to this. An object of the present invention is to prevent stress concentration from occurring in the transition portion of the front and rear frames when the cross-sectional shape dimensions of the front and rear frames are different from each other.

It is another object of the present invention to utilize the frame as a side frame in a vehicle body frame of an automobile so that the side frame can sufficiently counteract an external force such as an impact force at the time of collision of the automobile.

[0009]

[Means for Solving the Problems] The present invention for solving the above problems is as follows.

The invention of claim 1 is provided with a plurality of frame members 29, 30 which are parallel to each other in a certain direction and have a box shape as viewed from the longitudinal direction thereof and which are adjacent to each other. of 30, and a longitudinal direction of at least a portion 37 of the longitudinal portion 36 and the other of the frame members 30 of one of the frame members 29 it
Both plate members 33, 31 'that are configured to face each other are
The connecting plate members 39 are integrally connected to each other to form the connecting plate member 39.
Each frame is located between the inner spaces 41 and 42 of 0.
In the other longitudinal portions 48, 51 of the members 29, 30
A part of each of these frame members 29 and 30 the plate material constituting respectively 33, 31 ', and the coupling plate 39, which extends integrally along the longitudinal direction, each frame
In the other longitudinal portions 48, 51 of the frame members 29, 30.
Of the plate members 33, 31 ′ and the connecting plate member 39.
The frames have the same cross-sectional shape and dimension in the longitudinal direction .

According to a second aspect of the present invention, in addition to the first aspect of the invention, the longitudinal direction of each of the frame members 29 and 30 and the vehicle body 2 are the same.
The front and rear direction X of the frame member 2
It is a side frame of the vehicle body frame in which the direction in which 9, 30 are adjacent to each other and the width direction of the vehicle body 2 are aligned.

The invention of claim 3 is the method of molding a frame according to claim 1, wherein

Extrusion molding a frame material 56 extending linearly in a direction,

In this case, a plurality of frame member materials 29 ', which are formed by adjoining each other in the longitudinal direction of the frame material 56 in the shape of a box and are adjacent to each other and integrally connected to each other throughout the longitudinal direction thereof. Molding the frame material 56 to include 30 ',

In addition, the frame member material 29 ', 3
A connecting plate member 39 forming a connecting portion of the frame members 0'is located between the inner spaces 41, 42 of the adjacent frame member members 29 ', 30'. Plate members 33, which respectively constitute a part of 30 ' ,
The frame material 56 is molded so as to be shared by 31 ' ,

In addition, both the frame member materials 29 ', 3
0 ′ of one frame member material 29 ′ has a cross-sectional shape dimension that matches the cross-sectional shape dimension of the one frame member 29, and the other frame member material 30 ′ has a cross-sectional shape dimension of the other frame member material 30 ′. Molding the frame material 56 to match the geometry of the cross section of the member 30;

Next, each frame member material 29 ', 3 described above
The respective frame members 2 are cut by cutting out predetermined portions of 0 '.
This is a frame molding method for molding 9, 30.

In addition to the invention of claim 3, the invention of claim 4 extends in the longitudinal direction of the frame material 56, and in the direction in which the frame member materials 29 'and 30' are adjacent to each other. An imaginary plane 59 is set, and both frame member materials 29 ', 30' or both frame members 29, 3 are oriented so as to face in a direction intersecting with the imaginary plane 59.
This is a method of molding a frame in which 0 is integrally bent.

According to a fifth aspect of the present invention, in addition to the third or fourth aspect of the invention, the longitudinal direction of each frame member 29, 30 and the front-rear direction X of the vehicle body 2 are made to coincide with each other, and This is a method for forming a side frame of a vehicle body frame in which the direction of adjacency and the width direction of the vehicle body 2 are made to coincide.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 2 and 3, reference numeral 1 is an automobile, and an arrow Fr indicates the front thereof. The right and left described below means the width direction toward the front.

The vehicle body 2 of the automobile 1 is made of sheet metal, and the vehicle body frame 3 constituting the lower end thereof and the vehicle body 4 constituting the upper side of the vehicle body 2 and supported by the vehicle body frame 3
The interior of the vehicle body 4 is defined as a vehicle compartment 5. The vehicle body 4 is supported by an upper surface of the vehicle body frame 3 and forms a lower end surface of the vehicle compartment 5.
And a dash panel 7 extending upward from the front end of the floor panel 6 to form the front end surface of the vehicle compartment 5.

The vehicle body 2 is mounted on a traveling road surface 9 by a front wheel 8 supported by a front portion of the vehicle body frame 3 via a suspension and a rear wheel (not shown) supported by a rear portion of the vehicle body frame 3. Supported.

The vehicle body frame 3 constitutes left and right side portions of the vehicle body frame 3, and includes a pair of left and right aluminum metal side frames 11, 11 which are frames extending long in a front-rear direction X which is one direction. The plurality of cross members 12 and the side frames 1 extend in the orthogonal direction Y (the width direction of the vehicle body 2) that is orthogonal to the front-rear direction X in the horizontal direction before and after the side frames 11 are coupled to each other.
A pair of front and rear brackets 13, 13 attached to
And a sub-frame 14 that is supported by these brackets 13 and 13 and that supports the front wheel 8 via the suspension.
It has and.

The vehicle body frame 3 of the vehicle body 2 and the vehicle body frame 3 are defined with reference to an imaginary vehicle body center plane 15 which is orthogonal to the front-rear direction X and the orthogonal direction Y and passes through the center of the vehicle body 2 in the width direction and extends in the vertical direction Z. The main body 4 has a substantially left-right symmetrical shape.

Since the left and right side frames 11 and 11 have substantially the same structure, the right side frame 11 is
Will be explained.

In all the drawings, the side frame 11 is shown.
And the front side frame 17 that constitutes the front portion thereof and extends linearly in the front-rear direction X, and the front side frame 17
The intermediate portion side frame 18 extends rearward from the rear end side, and the rear side frame 19 extends rearward from the rear end side of the intermediate side frame 18. The floor panel 6 is supported on the upper surfaces of the rear portion of the rear portion 18 and the rear side frame 19.

The front side frame 17 has a rectangular box-shaped cross section when viewed in the longitudinal direction.

The intermediate side frame 18 has a front frame 21 and a reinforcing frame 22 which form the front portion thereof.
And a rear frame 23 forming a rear portion.
The front frame 21 and the reinforcing frame 22 each extend substantially linearly in the front-rear direction X, and the reinforcing frame 22 is welded to the upper surface of the front frame 21 to reinforce each other. The front end of the combination of the front frame 21 and the reinforcing frame 22 and the rear end of the front side frame 17 are joined by welding. Further, the rear end of the front frame 21 and the front end of the rear frame 23 are integrally coupled to each other, and the rear end of the rear frame 23 and the front end of the rear side frame 19 are mutually connected. They are combined together.

The rear frame 23 is bent so as to be displaced inward in the width direction of the vehicle body 2 with respect to the front frame 21, and is bent downward. Frame 21 to rear frame 2
The transition portion to 3 is a bent portion 25 having an arcuate convex shape facing upward. Further, the rear side frame 19 is bent upward with respect to the rear frame 23, and the transition portion from the rear frame 23 to the rear side frame 19 has an arcuate convex shape downward. The bent portion 26 is formed.

In FIGS. 1 and 4 to 7, the intermediate side frame 18 is provided with a plurality of (two) frame members 29 and 30 extending parallel to each other in a certain direction (corresponding to the front-rear direction X). ing. Each of these frame members 2
9 and 30 are four long plate materials (31 to 34 , 3 respectively).
1'-34 ' ) are integrally combined to form a rectangular box shape as viewed in the longitudinal direction (front-back direction X).

Of the above-mentioned frame members 29 and 30, one portion 36 (the outer side of the vehicle body 2) which is the rear portion in the longitudinal direction of the frame member 29 and the other (the inner side of the vehicle body 2).
The frame member 30 is adjacent to at least the front portion 37 in the longitudinal direction of the frame member 30 in the orthogonal direction Y (corresponding to the width direction of the vehicle body 2) and is integrally coupled to each other. The two portions 36 and 37 are the bent portions 2 of the transition portion from the front frame 21 to the rear frame 23.
5 has a shape in which the rear portion side of both the portions 36, 37 is bent so as to be displaced inward of the vehicle body 2 in the orthogonal direction Y and is bent downward. Has been done.

When the frame members 29, 30 are viewed from the longitudinal direction thereof, the frame members 2
The height dimensions of 9 and 30 are the same in the vertical direction Z, and they are located at the same position in the vertical direction Z. On the other hand, the width dimension of each of the frame members 29 and 30 in the orthogonal direction Y is larger in the other frame member 30 and the shape dimensions are different from each other.

[0034] its at least a portion 37 of the portion 36 and the other frame members 30 of one of the frame members 29 which are then integrally joined are arranged adjacent to the
Both plate members 33, 31 ', which are respectively configured and face each other, are
The seam is integrally connected to form the connecting plate 39.
There is. The internal spaces 4 of the one frame member 29 and the other frame member 30 as seen from the line of sight in the longitudinal direction.
Between the frame members 29, 30
A plate member 33 that constitutes a part of each of the frame members 29 and 30 in the other longitudinal portions 48 and 51 ,
31 'and the connecting plate member 39 extend integrally along the longitudinal direction, and each of the frame members 29, 3
0 in the other longitudinal portions 48, 51 of the plate member 3
3, 31 ', and the longitudinal direction of each of the connecting plate members 39
The cross-sectional shape and dimension of each part in the same direction are the same.

The reinforcing frame 22 is formed by an integral combination of three long plate members (44 to 46) so as to have an inverted U shape when viewed in the longitudinal direction (front-back direction X). Has been done. The width dimension of the reinforcing frame 22 in the orthogonal direction Y is substantially the same as that of the one frame member 29 and is located at the same position in the orthogonal direction Y. The reinforcing frame 22 is welded to the upper surface of the frame member 29 by welding. Are combined.

1, 2, 4 to 7, a portion 36 of the one frame member 29 and the reinforcing frame 22 are shown.
The rear end portion has a shape in which the width dimension in the orthogonal direction Y gradually decreases as it goes away from the other portion 48 of the frame member 29 in the front-rear direction X toward the rear. A cover plate 50 is provided that integrally closes the openings that open rearwardly in the inner space 41 of the one frame member 29 and the inner space 49 of the reinforcing frame 22, respectively.
The one frame member 29 and the reinforcing frame 22 are joined to the opening edges of the openings at the rear ends of the reinforcing frame 22 by welding.

A portion 37 of the other frame member 30
From the other part 51 of the frame member 30 in the front-back direction X
The width dimension in the orthogonal direction Y gradually decreases as the distance from the front side increases. The cover plate 5 that closes the opening in which the internal space 42 of the frame member 30 opens toward the front.
2 is provided, and the cover plate 52 is joined to the opening edge of the opening at the front end of the other frame member 30 by welding.

Due to the cover plates 50 and 52, each of the portions 36 and 37 of the frame members 29 and 30 has a rectangular box-shaped cross-section in the longitudinal direction, so that the strength is improved and a predetermined strength is achieved. Is secured.

1, 4 to 8, a method of molding the intermediate side frame 18 of the side frame 11 will be described.

As indicated by the alternate long and short dash line in FIGS. 1 and 4, first,
A frame material 56 that extends linearly in a direction (preferably a horizontal direction) is extruded.

At this time, four plate members 31 to 34 ,
A plurality of frames in which the cross-sections of the frame material 56 in the longitudinal direction are formed in a rectangular box shape so as to be adjacent to each other by an integral combination of 31 ' to 34' , and are integrally coupled to each other throughout the entire longitudinal direction. The frame material 56 is molded to include the member materials 29 'and 30'.

In addition, the frame member materials 29 ', 3
A connecting plate member 39 forming a connecting portion of the frame members 0'is located between the inner spaces 41, 42 of the adjacent frame member members 29 ', 30'. Plate members 33, which respectively constitute a part of 30 ' ,
The frame material 56 is molded so as to be shared by 31 ' .

In addition, both frame member materials 29 ', 3
0 ′ of one frame member material 29 ′ has a cross-sectional shape dimension that matches the cross-sectional shape dimension of the one frame member 29, and the other frame member material 30 ′ has a cross-sectional shape dimension of the other frame member material 30 ′. The frame material 56 is shaped to match the cross sectional geometry of the member 30.

Next, while extending along the longitudinal direction of the frame material 56, each of the frame member materials 29 ',
An imaginary plane 59 extending in the direction in which 30 'adjoins is set, and both frame member materials 29', 30 'are integrally bent so as to face in a direction intersecting with the imaginary plane 59 (see an arrow in FIG. 4). A), the bent portion 25 is molded, while
The bent portion 26 is formed by bending between the frame member 30 and the rear side frame 19.

Next, each of the frame member materials 29 ', 3
The respective frame members 2 are cut by cutting out predetermined portions of 0 '.
Mold 9,30. In particular, in FIG. 1, the predetermined portion is a portion 29 ′ a of one frame member material 29 ′ facing the portion 36 of the one frame member 29 in the orthogonal direction Y and the other of the one frame member 29. Part 4
The portion 3 of the other frame member material 30 'facing 8
0'a, a portion 30'b of the other frame member material 30 'facing the portion 37 of the other frame member 30,
And a portion 29'b of one frame member material 29 'facing the other portion 51 of the other frame member 30.

The cut surface after the above cutting is shown in a satin pattern in FIGS. 4 to 8 for convenience of explanation.

Thus, the intermediate side frame 1 including the front frame 21 and the rear frame 23 extending rearward and downward from the rear end of the front frame 21.
8 is molded.

Both frame members 29 and 30 of the intermediate side frame 18 may be entirely linear, and in this case, both frame member materials 29 'and 30' are linear. The predetermined portion may be cut off as described above with the original shape. Also, if necessary,
Similarly to the above, both the frame members 29 and 30 may be integrally bent so as to face the direction intersecting the virtual plane 59.

Next, the reinforcing frame 22 is joined to the front frame 21 and each frame member 29, 30 is connected.
The cover plates 50 and 52 are coupled to the respective portions 36 and 37 of the.

According to the above structure, the intermediate side frame 18 of the side frame 11 extends in parallel in a certain direction and is formed into a box shape as seen from the longitudinal direction of the frame member and is adjacent to each other. 29, 30
The provided, of these frame members 29 and 30, its a longitudinal at least a portion 37 of the longitudinal portion 36 and the other of the frame members 30 of one of the frame members 29
Both plate members 33, 31 ', which are respectively configured and face each other, are
And a connecting plate 39 is formed by being integrally connected to the shell,
The two frame members 2 which are adjacent to each other as seen from the above line of sight.
Located between the two inner spaces 41 and 42 9,30 each off
On the other longitudinal portions 48, 51 of the ram members 29, 30
Definitive These and plate 33, 31 'a portion of each frame member 29 and 30 to constitute respectively, and the coupling plate 39, which extends integrally along the longitudinal direction, the
Other longitudinal portions 48, 5 of the frame members 29, 30
1. The plate members 33, 31 'in 1 and the connecting plate member
The shape dimensions of the respective cross sections of 39 in the longitudinal direction are the same.

Therefore, when molding the intermediate side frame 18 of the side frame 11, one of the frame member materials 29 'is formed so as to match the cross-sectional shape and size of the front frame 21 constituting the front side thereof. And the other frame member material 30 'integrally formed adjacent to the one frame member material 29' so as to match the cross-sectional shape and dimension of the rear frame 23 constituting the rear side. A frame material 56 having a cross-sectional shape and dimensions in which the frame member materials 29 'and 30' are integrated is extruded, and then a predetermined portion of the frame material 56 is cut so that the frame members 29 and 30 are molded. For example, the intermediate side frame 18 of the side frame 11 is obtained.

Therefore, even if the rear frame 23 of the middle side frame 18 of the side frame 11 with respect to the front frame 21 is bent in a predetermined direction and the cross-sectional shapes are different from each other, the extrusion-molded frame material is used. By cutting out a predetermined portion of 56, the front frame 21 and the rear frame 23 are integrated with each other. Therefore, in obtaining the intermediate side frame 18 of the side frame 11, the front frame is obtained. Since it is not necessary to weld 21 and the rear frame 23 to each other by welding, the front and rear frames 21 and 23 are applied by the external force applied to the side frame 11.
It is prevented that stress concentration occurs at the transition part of
This is preferable in terms of strength of the side frame 11.

Further, as described above, each frame member 2
The longitudinal direction of 9, 30 and the front-rear direction X of the vehicle body 2 are aligned with each other, and the direction in which the frame members 29, 30 are adjacent to each other and the width direction of the vehicle body 2 are aligned with each other. Side frame 1 in the middle of frame 11
8 is molded.

Therefore, since the intermediate side frame 18 of the side frame 11 has a structure in which stress concentration is unlikely to occur, it is possible to sufficiently counter the impact force applied to the vehicle body 2 when the vehicle 1 collides.

As described above, the side frame 1
When the front wheel 8 of No. 1 is molded, the frame material 56 linearly extending in a certain direction is extruded and molded,

In this case, a plurality of frame member materials 29 ', which are formed by box-shaped cross-sections of the frame material 56 adjacent to each other and integrally coupled to each other over the entire longitudinal direction thereof. Molding the frame material 56 to include 30 ',

In addition, the frame member materials 29 ', 3
A connecting plate member 39 forming a connecting portion of the frame members 0'is located between the inner spaces 41, 42 of the adjacent frame member members 29 ', 30'. Plate members 33, which respectively constitute a part of 30 ' ,
The frame material 56 is molded so as to be shared by 31 ' ,

In addition, both frame member materials 29 ', 3
0 ′ of one frame member material 29 ′ has a cross-sectional shape dimension that matches the cross-sectional shape dimension of the one frame member 29, and the other frame member material 30 ′ has a cross-sectional shape dimension of the other frame member material 30 ′. Molding the frame material 56 to match the geometry of the cross section of the member 30;

Next, the above-mentioned frame member materials 29 ', 3
The frame members 29 and 30 are formed by cutting out predetermined portions of 0 '. According to this forming method, the front frame 21 and the front frame 21 constituting the intermediate side frame 18 of the side frame 11 are formed. The side frame 11 can be easily formed as compared with the forming method in which the rear frame 23 and the rear frame 23 are individually formed and then the two and 23 are welded to each other.

Particularly, when the material of the side frame 11 is made of aluminum metal, the extrusion molding is extremely easy, and the side frame 11 can be molded more easily by that much.

Further, as described above, when the front wheel 8 of the side frame 11 is molded, it extends along the longitudinal direction of the frame material 56 and the frame member materials 29 'and 30' are adjacent to each other. An imaginary plane 59 extending along the direction is set, and both frame member materials 29 ', 30' are oriented so as to face in a direction intersecting the imaginary plane 59.
Alternatively, both frame members 29 and 30 are integrally bent.

Therefore, the frame member material 29 ',
Wrinkles are less likely to occur in the bent portion 25, as compared with bending the 30 'or the frame members 29, 30 in the direction along the virtual plane 59.

Therefore, stress concentration at the bent portion 25 between the front frame 21 and the rear frame 23 can be prevented more reliably.

The intermediate side frame 18 of the side frame 11 includes a front frame 21 and a rear frame 2.
Since the bending portion 25 is provided between the bending portion 25 and the vehicle body 3, stress concentration tends to occur in the bending portion 25 due to the impact force applied to the vehicle body 2 when the automobile 1 collides. However, as described above, since the bent portion 25 is prevented from being wrinkled due to bending, stress concentration is prevented from being generated in the bent portion 25, and the impact force can be sufficiently counteracted.

It should be noted that, although the above is based on the example shown in the drawings, with respect to the straight portion of one frame member 29, the reinforcing frame 2
Alternatively, the reinforcing frame 22 and the frame members 29 and 30 may be integrally extruded.

[0066]

The effects of the present invention are as follows.

The invention according to claim 1 is provided with a plurality of frame members which are parallel to each other in a certain direction and which are box-shaped as seen from the line of sight in the longitudinal direction thereof and are adjacent to each other. The two plate members facing each other and forming a part in the longitudinal direction of the frame member and at least a part in the longitudinal direction of the other frame member are
A connecting plate member is integrally formed to form a connecting plate member, and the connecting plate member is located between the inner spaces of the adjacent frame members when viewed from the above-mentioned line of sight, and is formed at another portion in the longitudinal direction of each frame member.
The plate member that constitutes a part of each of the frame members and the connecting plate member integrally extend along the longitudinal direction, and the other plate member in the longitudinal direction of the frame member.
Each of the above-mentioned plate material in the part and the above-mentioned connecting plate material
The shape dimensions of the cross-sections of the respective parts in the longitudinal direction are the same.

Therefore, at the time of molding the above-mentioned frame, one of the frame member materials is determined so as to match the shape dimension of the cross section of the front frame constituting the front side thereof, and the one of the rear frame constituting the rear side is determined. Determine the other frame member material integrally formed adjacent to the one frame member material so as to match the cross-sectional shape dimension, and extrude the frame material having the cross-sectional shape dimension in which both the frame member materials are integrated. Then, the frame is obtained by cutting a predetermined portion of the frame material so that the frame members are molded.

Therefore, even if the rear frame with respect to the front frame of the frame bends in a predetermined direction, and in addition to this, even if the cross-sectional shape dimensions are different from each other, a predetermined portion of the extrusion-molded frame material is obtained. The front frame and the rear frame are integrated with each other by cutting off the respective parts, and therefore, in obtaining the frame, it is not possible to join the front frame and the rear frame by welding. Since it is unnecessary, it is possible to prevent stress concentration from occurring in the transition portion of the front and rear frames due to the external force applied to the frame, which is preferable in terms of strength of the frame.

According to a second aspect of the present invention, the longitudinal direction of each frame member is aligned with the front-rear direction of the vehicle body, and the direction in which the frame members are adjacent to each other is aligned with the width direction of the vehicle body. Thus, the side frame of the vehicle body is molded.

For this reason, since the frame in which stress concentration is hard to occur is applied to the side frame of the vehicle body, it is possible to sufficiently counter the impact force applied to the vehicle body at the time of collision of the vehicle. Further, since the side frame opposes the impact force, the impact force is transmitted to each of the other parts of the vehicle body via the side frame, and the energy based on the impact force is effectively absorbed.

According to a third aspect of the present invention, there is provided the method of forming a side frame, comprising extruding a frame material that linearly extends in a certain direction,

At this time, the cross-sections of the respective parts of the frame material in the longitudinal direction are formed into a box shape and are adjacent to each other, and
Shaping the frame material to include a plurality of frame member materials that are integrally joined together over their entire length;

Further, the joint plate material forming the joint portion of the frame member materials is located between the inner spaces of the adjacent frame member materials, and a part of each of the frame member materials is respectively disposed. Mold the above frame material so that it can be shared by the constituent plate materials,

Of the two frame member materials, the shape and size of the cross section of one of the frame member materials matches the shape and size of the cross section of the one frame member, and the shape and size of the cross section of the other frame member material is the above. Form the frame material to match the geometrical shape of the cross section of the other frame member,

Next, a predetermined portion of each frame member material is cut off to mold each frame member. According to this molding method, a front frame and a rear frame that form the frame are formed. Individually molded,
Further, the frame can be easily formed as compared with the forming method in which these are welded to each other.

Particularly, when the material of the frame is made of aluminum metal, the extrusion molding is extremely easy, and accordingly, the molding of the frame becomes easier.

According to a fourth aspect of the present invention, when a bent frame is formed, a virtual plane extending along the longitudinal direction of the frame material and extending along the direction in which the frame member materials are adjacent to each other. Is set, and both frame member materials or both frame members are integrally bent so as to face in the direction intersecting the virtual plane.

Therefore, as compared with bending the frame member material or the frame member in the direction along the virtual plane, the bent portion is less likely to be wrinkled.

Therefore, stress concentration is more reliably prevented from occurring at the bent portion between the front frame and the rear frame.

According to the fifth aspect of the present invention, the longitudinal direction of each frame member is aligned with the front-rear direction of the vehicle body, and the direction in which the frame members are adjacent to each other is aligned with the width direction of the vehicle body.

Therefore, the above-mentioned frame was used for molding the side frame of the vehicle body. In this case, since there is a bent portion between the front frame and the rear frame constituting the side frame, the automobile is At the time of collision, stress concentration tends to occur at the bent portion due to the impact force applied to the vehicle body. However, as described above, since wrinkles due to bending are prevented from being generated in the bent portion, stress concentration is prevented from being generated in the bent portion, and the impact force can be sufficiently counteracted.

[Brief description of drawings]

FIG. 1 is a partially enlarged view of FIG.

FIG. 2 is a simplified side view of the front of the vehicle.

FIG. 3 is a simplified plan view of the front of the vehicle.

FIG. 4 is a partially enlarged partial expanded view of FIG.

5 is a sectional view taken along line 5-5 of FIG.

6 is a sectional view taken along the line 6-6 of FIG.

7 is a sectional view taken along the line 7-7 of FIG.

FIG. 8 is a sectional view taken along the line 8-8 of FIG.

[Explanation of symbols]

1 car 2 car body 3 body frame 11 Side frame (frame) 18 Middle side frame 21 front frame 23 Rear frame 25 Folding part 29,30 frame members 29 ', 30' frame material 31, 32, 33, 34 Plate material 36,37 part 39 Bonding plate material 41,42 Internal space 48,51 other parts 56 frame material 57 parts 59 virtual plane X front-back direction Y orthogonal direction Z vertical direction

Continuation of the front page (56) Reference JP-A-10-152067 (JP, A) JP-A-10-316042 (JP, A) JP-A-5-58338 (JP, A) JP-A-6-7874 (JP , A) Tokuheihei 8-507018 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B62D 21/02 B62D 25/20

Claims (5)

(57) [Claims] 1. A plurality of frame members (29, 30) , which are parallel to each other in a certain direction and are box-shaped as seen from the line of sight in the longitudinal direction thereof and are adjacent to each other, the frame members (29, 30). One of the frame members
A longitudinal portion (36) of (29) and at least a longitudinal portion (37) of the other frame member (30 );
Both plate members (33, 3
1 ') are integrally connected to each other to form a connecting plate (3
9) is formed , and both internal spaces (41, 4 ) of the adjacent frame members (29, 30 ) are formed when viewed from the above-mentioned line of sight.
2) located between the above frame members (29, 30)
A plate member that constitutes a part of each of the frame members (29, 30) in the other portion (48, 51) in the longitudinal direction.
(33, 31 ') and the connecting plate (39) extend integrally along the longitudinal direction, and at the same time , each of the flakes.
Other parts (48, 5) in the longitudinal direction of the frame members (29, 30)
The plate material (33, 31 ') in 1) and the connection
A frame in which the cross-sectional shapes of the plywood members (39) in the longitudinal direction are the same. 2. Each frame member (2 ) according to claim 1.
9, 30) are aligned with the longitudinal direction (X ) of the vehicle body (2) , and the direction in which the frame members (29, 30) are adjacent to each other is aligned with the width direction of the vehicle body (2). Side frame of the car body frame. 3. A method of molding a frame according to claim 1, extend linearly toward a certain direction frame material (56)
A plurality of frame members in which the cross-sections of the frame material (56) in the longitudinal direction are box-shaped and adjacent to each other, and are integrally joined to each other over the entire longitudinal direction. material (29 ', 30') and molding the frame material (56) so equipped with and the frame member material (29 ', 30') is bonded sheet material to form a mutual coupling portion (39), the both frame member material (29 ', 30') which are arranged adjacent to configure each frame member material (29 ', 30') located between the two inner spaces (41, 42) of a portion each plate
The above frame material so that it can be shared by (33, 31 ')
(56) shaping the, and the both frame members material (29 ', 30') of the geometry of the cross section of one of the frame member material (29 ') is of a cross-section of one of the frame members above (29) Shape the frame material (56) so that it conforms to the geometry and the cross-sectional geometry of the other frame member material (30 ') matches the geometry of the cross-section of the other frame member (30) ; A predetermined part of each frame member material (29 ', 30') is cut off to obtain each frame member (29, 30).
A method of molding a frame so as to mold. 4. The frame member material (2 ) as well as extending along the longitudinal direction of the frame material (56).
9 ', 30') are imaginary planes extending in adjacent directions
(59) is set, and both frame member materials (29 ', 30') are directed so as to face in the direction intersecting with the virtual plane 59.
Alternatively, the frame molding method according to claim 3, wherein both frame members (29, 30) are integrally bent. 5. The longitudinal direction of each frame member (29, 30) and the longitudinal direction of the vehicle body (2) according to claim 3 or 4.
(X) and the frame members (29, 3
The molding method of the side frame of the vehicle body frame in which the direction in which ( 0) is adjacent and the width direction of the vehicle body (2) are matched.