JP2001080541A - Frmae, side frame of body frame using same, and forming method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent stress concentration from being generated in a transition part of front and rear frames, when the rear frame is formed into a bent shape with respect to the front frame in a frame, or when respective cross-sectional shape dimensions of the front and rear frames are different each other, in addition thereto. SOLUTION: A side frame 11 is provided with plural frame members 29, 30 extended in parallel toward a direction, formed respectively into box shapes in its longitudinal-directional view, and arranged adjacently. One portion 36 of the one side frame member 29 is coupled intergally each other to at least one portion 37 of the other frame member 30. A coupling plate material 39 for forming a mutual coupling part for the both portions 36, 37, and plate materials 31, 33 positioned between both inner spaces 41, 42 of the both frame members 29, 30 in the view hereinbefore to constitute respective one-parts of the respective frame members 29, 30 are extended integrally along the longitudinal direction hereinbefore, and shape dimensions of respective cross-sections thereof are same each other.

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 having a box-shaped cross section are adjacent to each other and integrally connected, a side frame of a body frame using the frame, and a method of forming the same. It is about.

[0002]

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

That is, in a plan view of the vehicle body, a front frame constituting a front portion of the side frame extends linearly in the front-rear direction, and a rear frame constituting a rear portion of the side frame is provided behind the front frame. It has a shape that extends rearward from the end and is bent so that the extended end side is deflected inward in the width direction of the vehicle body.

The front frame and the rear frame each have a rectangular box-shaped cross section. However, the front and rear frames have different shapes due to differences in required strength due to differences in vehicle components supported by the respective frames. Are different from each other in shape and size.

[0005] Therefore, when the side frame is to be formed, first, the front and rear frames are individually formed, and then the front end of the rear frame is welded to the rear end of the front frame. Is performed.

[0006]

By the way, the joint portion formed by welding the front and rear frames is a portion where the strength tends to suddenly increase in the longitudinal direction. Therefore, when the frame is subjected to an external force, There is a possibility that stress concentration may occur in the transition portion of the front and rear frames in the vicinity of the coupling portion, which is not preferable in terms of the strength of the frame.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has been described in connection with a case where a rear frame is bent with respect to a front frame in a longitudinal direction of the frame. An object of the present invention is to prevent stress concentration at transition portions of the front and rear frames when the cross-sectional shapes of the front and rear frames are different from each other.

It is another object of the present invention to use the above-mentioned frame as a side frame in a vehicle body frame so that the side frame can sufficiently resist external force such as an impact force at the time of collision of the vehicle.

[0009]

The present invention for solving the above-mentioned problems is as follows.

According to the first aspect of the present invention, there are provided a plurality of frame members 29, 30 which extend in parallel in a certain direction, are box-shaped as viewed from the line of sight in the longitudinal direction, and are adjacent to each other. 30, a longitudinal portion 36 of one frame member 29 and at least a portion 37 in the longitudinal direction of the other frame member 30 are integrally joined to each other, and the two portions 36 and 37 thus joined are joined together. Bonding plate material 39 forming a bonding portion with each other
And the plate members 31 and 33 which are located between the inner spaces 41 and 42 of the frame members 29 and 30 adjacent to each other as viewed from the line of sight and constitute a part of the frame members 29 and 30 respectively. And a frame extending integrally along the longitudinal direction and having the same cross-sectional shape and dimensions.

According to a second aspect of the present invention, in addition to the first aspect, the longitudinal direction of each of the frame members 29 and 30 and the body 2
Of the frame member 2
This 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 matched.

According to a third aspect of the present invention, there is provided the frame forming method according to the first aspect,

Extruding a frame material 56 extending linearly in a certain direction,

At this time, a plurality of frame member materials 29 ', which are formed in a box shape in the longitudinal direction of the frame material 56 so as to be adjacent to each other and are integrally connected to each other over the entire length thereof. Molding said frame material 56 to comprise 30 ';

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

In addition, the two frame member materials 29 ', 3
0 ', the cross-sectional shape of one frame member material 29' matches the cross-sectional shape of one frame member 29, and the cross-sectional shape of the other frame member material 30 'matches the other frame member. The frame material 56 is molded so as to match the cross-sectional shape and size of the member 30,

Next, each of the frame member materials 29 ', 3
0 'is cut out from each of the frame members 2.
This is a method of forming a frame in which the frames 9 and 30 are formed.

According to a fourth aspect of the present invention, in addition to the third aspect of the present invention, the frame members 56 extend along the longitudinal direction of the frame material 56 and the frame member materials 29 'and 30' extend along the adjacent direction. A virtual plane 59 is set, and both frame member materials 29 ′, 30 ′ or both frame members 29, 3 are oriented in a direction intersecting the virtual plane 59.
This is a method of forming a frame in which 0 is bent integrally.

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

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

2 and 3, reference numeral 1 denotes an automobile, and an arrow Fr indicates the front thereof. The left and right described below refer to the width direction toward the front.

The vehicle body 2 of the automobile 1 is made of sheet metal and has a vehicle body frame 3 constituting a lower end thereof, and a vehicle body 4 constituting an upper side of the vehicle body 2 and supported by the vehicle body frame 3.
The interior of the vehicle body 4 is 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 and forming a front end surface of the vehicle compartment 5.

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

The vehicle body frame 3 comprises a pair of left and right aluminum metal side frames 11, 11 constituting left and right side portions of the body frame 3 and extending in the front-rear direction X which is one direction. A plurality of cross members 12 extend before and after the side frames 11 extend in the orthogonal direction Y (width direction of the vehicle body 2) that is orthogonal to the front-rear direction X in the horizontal direction and connect the side frames 11 to each other.
1 and a pair of front and rear brackets 13
And a sub-frame 14 supported by the brackets 13 and 13 to support the front wheels 8 via the suspension.
And

The vehicle body frame 3 and the vehicle body 2 of the vehicle body 2 are defined on the basis of a virtual vehicle center plane 15 extending in the vertical direction Z through the center in the width direction of the vehicle body 2 at right angles to the front-rear direction X and the orthogonal direction Y. The main body 4 is substantially symmetrical left and right.

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

In all figures, the side frame 11
A front side frame 17 which constitutes the front portion and extends linearly in the front-rear direction X;
A rear side frame 19 extending rearward from the rear end of the intermediate portion side frame 18; and a rear side frame 19 extending rearward from the rear end of the intermediate portion side frame 18. The floor panel 6 is supported on the upper surface 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 comprises a front frame 21 and a reinforcing frame 22 which constitute a front portion thereof.
And a rear frame 23 constituting a rear portion.
The front frame 21 and the reinforcing frame 22 extend substantially linearly in the front-rear direction X, and the reinforcing frame 22 is joined to the upper surface of the front frame 21 by welding and reinforced with each other. The front end of the combined body of the front frame 21 and the reinforcing frame 22 and the rear end of the front side frame 17 are joined by welding. In addition, the rear end of the front frame 21 and the front end of the rear frame 23 are integrally joined 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 joined together.

The rear frame 23 is bent so as to be deviated 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 arc-shaped convex shape facing upward. Further, the rear side frame 19 is bent upward with respect to the rear frame 23, and the transition from the rear frame 23 to the rear side frame 19 has a downwardly arcuate convex shape. The bent portion 26 is formed.

1, 4 to 7, the intermediate portion side frame 18 includes a plurality of (two) frame members 29, 30 extending in a certain direction (coinciding with the front-rear direction X) in parallel with each other. ing. Each of these frame members 2
9 and 30 are each formed by an integral combination of four long plate materials (31 to 34) so as to have a rectangular box shape when viewed in the longitudinal direction (X direction).

Of the frame members 29 and 30, one (the outer side of the vehicle body 2) is a portion 36 which is a rear portion in the longitudinal direction of the frame member 29 and the other (the inner side of the vehicle body 2).
A portion 37 that is at least a front portion of the frame member 30 in the longitudinal direction is made adjacent to the orthogonal direction Y (corresponding to the width direction of the vehicle body 2) and is integrally connected to each other. The two portions 36 and 37 are bent portions 2 at the transition from the front frame 21 to the rear frame 23.
5, the rear portions of the two portions 36 and 37 are bent so as to be deviated inward in the vehicle body 2 in the orthogonal direction Y with respect to the front portions, and are bent downward. Have been.

When each of the frame members 29 and 30 is viewed from the line of sight in the longitudinal direction thereof,
9 and 30 have the same height in the vertical direction Z and are located at the same position in the vertical direction Z. On the other hand, the width of each of the frame members 29, 30 in the orthogonal direction Y is made larger in the other frame member 29, so that their shape and dimensions are different from each other.

As described above, the connecting plate member 39 which forms the connecting portion between the above-described portion 36 of the one frame member 29 and at least a portion 37 of the other frame member 30 which are integrally connected to each other is provided. A plate member, which is located between the internal spaces 41 and 42 of the one frame member 29 and the other frame member 30 when viewed in the line of sight in the longitudinal direction, and configures a part of each of the frame members 29 and 30, respectively. 31 and 34 extend integrally along the longitudinal direction and have the same cross-sectional shape and size.

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 from the line of sight in the longitudinal direction (X direction). Have been. 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 positioned 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. Have been combined.

1, 2, 4-7, a portion 36 of the one frame member 29 and the reinforcing frame 22 are shown.
The rear end of the frame member 29 has a shape in which the width in the orthogonal direction Y gradually decreases as the distance from the other portion 48 of the frame member 29 toward the rear in the front-rear direction X increases. An inner space 41 of the one frame member 29 and an inner space 49 of the reinforcing frame 22 are each provided with a cover plate 50 that integrally closes an opening that opens rearward.
The rear ends of the one frame member 29 and the reinforcing frame 22 are joined to the opening edges of the openings by welding.

Part 37 of the other frame member 30
From the other portion 51 of the frame member 30 in the front-rear direction X
, The width in the orthogonal direction Y gradually decreases as the distance from the front increases. The cover plate 5 that closes the opening in which the internal space 42 of the frame member 30 opens forward.
The cover plate 52 is welded to the opening edge of the opening at the front end of the other frame member 30 by welding.

By means of the cover plates 50 and 52, the portions 36 and 37 of the frame members 29 and 30 have a rectangular box-shaped cross section in the longitudinal direction, thereby improving the strength and achieving a predetermined strength. Is secured.

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

As shown by the dashed line in FIGS.
Extrude a frame material 56 that extends linearly in one direction (preferably the horizontal direction).

At this time, the longitudinal section of the frame material 56 is formed into a rectangular box shape by means of an integral combination of the four plate members 31 to 34, and is made adjacent to each other. A plurality of frame member materials 29 ', 30' which are joined together
The frame material 56 is molded so as to have

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

The two frame member materials 29 ', 3
0 ', the cross-sectional shape of one frame member material 29' matches the cross-sectional shape of one frame member 29, and the cross-sectional shape of the other frame member material 30 'matches the other frame member. The frame material 56 is molded so as to conform to the cross-sectional shape and size 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 is set extending along the direction in which the imaginary planes 30 'are adjacent to each other. A), the bent portion 25 is formed,
The bent portion 26 is formed by bending the space between the frame member 30 and the rear side frame 19.

Next, each of the frame member materials 29 ', 3
0 'is cut out from each of the frame members 2.
9 and 30 are molded. 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 portion of the one frame member 29. Part 4
8 of the other frame member material 30 ′
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 resection is indicated by a satin pattern in FIGS. 4 to 8 for convenience of explanation.

Thus, the intermediate side frame 1 having 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.

The two frame members 29, 30 of the intermediate portion side frame 18 may be entirely linear. In this case, the two frame member materials 29 ', 30' are The predetermined portion may be cut off as described above while keeping the general shape. Also, if necessary,
As described above, the frame members 29 and 30 may be integrally bent so as to face in a direction intersecting the virtual plane 59.

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

According to the above structure, the intermediate side frame 18 of the side frame 11 has a plurality of frame members which extend in parallel in a certain direction and are box-shaped as viewed from the line of sight in the longitudinal direction, and are adjacent to each other. 29,30
And a longitudinal portion 36 of one frame member 29 and at least a portion 37 in the longitudinal direction of the other frame member 30 are integrally joined to each other, and these are joined. The connecting plate 39 forming the connecting portion of the two portions 36 and 37 and the internal spaces 41 and 42 of the adjacent frame members 29 and 30 viewed from the line of sight. The plate members 31 and 33 respectively constituting a part of the frame members 29 and 30 extend integrally along the longitudinal direction and have the same cross-sectional shape and dimensions.

Therefore, when forming the intermediate side frame 18 of the side frame 11, the one of the frame member material 29 'is formed so as to conform to the cross-sectional shape of the front frame 21 constituting the front side. The other frame member material 30 'integrally formed adjacent to the one frame member material 29' so as to conform to the cross-sectional shape and size of the rear frame 23 constituting the rear side is determined. 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 off so that the frame members 29 and 30 are formed. For example, an intermediate side frame 18 of the side frame 11 is obtained.

Therefore, even when the rear frame 23 of the intermediate 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 and dimensions are different from each other, the extruded frame material can be used. By cutting off a predetermined portion of 56, the front frame 21 and the rear frame 23 can be integrated with each other. Therefore, when obtaining the intermediate side frame 18 of the side frame 11, the front frame Since it is not necessary to join the rear frame 21 and the rear frame 23 by welding, the external force applied to the side frame 11 causes the front and rear frames 21, 23
The occurrence of stress concentration at the transition of
This is preferable in terms of the strength of the side frame 11.

As described above, each frame member 2
The longitudinal direction of the body 9 and 30 is aligned with the front-back direction X of the vehicle body 2, and the direction in which the frame members 29 and 30 are adjacent to each other is matched with the width direction of the vehicle body 2. Intermediate side frame 1 of frame 11
8 is formed.

For this reason, since the intermediate portion side frame 18 of the side frame 11 has a structure in which stress concentration is unlikely to occur, it is possible to sufficiently resist the impact force applied to the vehicle body 2 at the time of collision of the automobile 1 or the like.

As described above, the side frame 1
When the front wheel 8 is formed, a frame material 56 that extends linearly in a certain direction is extruded and formed.

At this time, the cross section of each of the frame members 56 in the longitudinal direction is box-shaped so that they are adjacent to each other, and a plurality of frame member materials 29 ', Molding said frame material 56 to comprise 30 ';

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

Further, both frame member materials 29 ', 3
0 ', the cross-sectional shape of one frame member material 29' matches the cross-sectional shape of one frame member 29, and the cross-sectional shape of the other frame member material 30 'matches the other frame member. The frame material 56 is molded so as to match the cross-sectional shape and size of the member 30,

Next, each of the frame member materials 29 ', 3
Each of the frame members 29 and 30 is molded by cutting off a predetermined portion of the frame frame 0 '. According to this molding method, the front frame 21 and the front frame 21 constituting the intermediate side frame 18 of the side frame 11 are formed. The molding of the side frame 11 can be facilitated as compared with a molding method in which the rear frame 23 and the rear frame 23 are individually molded, and furthermore, these 21 and 23 are welded to each other.

In particular, when the material of the side frame 11 is made of aluminum metal, the extrusion molding is extremely easy, and the molding of the side frame 11 is further facilitated.

As described above, when the front wheel 8 of the side frame 11 is formed, the front wheel 8 extends along the longitudinal direction of the frame material 56 and the frame member materials 29 'and 30' are adjacent to each other. A virtual plane 59 extending along the direction is set, and the two frame member materials 29 ′ and 30 ′ are oriented in a direction intersecting the virtual plane 59.
Alternatively, both frame members 29, 30 are bent integrally.

Therefore, the frame member material 29 ',
Compared to bending the frame member 30 ′ or the frame members 29, 30 in the direction along the virtual plane 59, the bent portion 25 is less likely to wrinkle.

Therefore, the occurrence of stress concentration in the bent portion 25 between the front frame 21 and the rear frame 23 is more reliably prevented.

The intermediate side frame 18 of the side frame 11 includes a front frame 21 and a rear frame 2.
Since the vehicle 1 has the bent portion 25, stress concentration tends to occur in the bent portion 25 due to the impact force applied to the vehicle body 2 at the time of collision of the vehicle 1. However, as described above, since wrinkles due to bending are prevented from being formed in the bent portion 25, stress concentration is prevented from being generated in the bent portion 25, and the impact force can be sufficiently counteracted.

Although the above description is based on the illustrated example, the reinforcing frame 2 is attached to the straight portion of one frame member 29.
2 may be integrally formed, and the reinforcing frame 22 and the two frame members 29 and 30 may be integrally formed by extrusion.

[0066]

The effects of the present invention are as follows.

According to the first aspect of the present invention, there are provided a plurality of frame members which extend in parallel in a certain direction, are box-shaped as viewed from the line of sight in the longitudinal direction, and are adjacent to each other. A joining plate member integrally joined to a part of the longitudinal direction of the frame member and at least a part of the longitudinal direction of the other frame member to form a joint between the joined two parts; As seen from above, a plate member which is located between both internal spaces of the adjacent frame members and constitutes a part of each of the frame members respectively extends integrally along the longitudinal direction and has a cross section of each part thereof. The shape and dimensions are the same as each other.

For this reason, when forming the frame, the material of one of the frame members is determined so as to conform to the cross-sectional shape and size of the front frame constituting the front portion, and the rear frame constituting the rear portion is formed. The other frame member material integrally molded adjacent to the one frame member material is determined so as to conform to the cross-sectional shape dimension, and the frame material having a cross-sectional shape dimension integrating the two frame member materials is extruded. Then, by cutting off a predetermined portion of the frame material so that each of the frame members is formed, the frame is obtained.

Therefore, even if the rear frame of the frame is bent in a predetermined direction with respect to the front frame, and in addition to this, even if the cross-sectional shapes and dimensions are different from each other, a predetermined portion of the extruded frame material is used. By cutting off each part of the above, it is possible to obtain the front frame and the rear frame integrated with each other, 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 the occurrence of stress concentration at the transition portion between the front and rear frames due to the external force applied to the frame, which is preferable in terms of the 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-back 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. Thereby, the side frame of the vehicle body is formed.

For this reason, since the frame in which stress concentration hardly occurs is applied to the side frame of the vehicle body, it is possible to sufficiently oppose the impact force applied to the vehicle body at the time of collision of the vehicle. Further, as 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, whereby the energy based on the impact force is effectively absorbed.

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

At this time, the cross section of each part in the longitudinal direction of the frame material is box-shaped and is adjacent to each other.
Molding the frame material to comprise a plurality of frame member materials integrally joined to each other throughout its length,

Further, a connecting plate member forming a connecting portion of the frame member materials is located between both internal spaces of the adjacent frame member materials and a part of each of the frame member materials is respectively provided. Molding the frame material so that it is shared by the constituent plate materials,

Further, of the two frame member materials, the cross-sectional shape of one frame member material matches the cross-sectional shape size of the one frame member material, and the cross-sectional shape size of the other frame member material is the same. Forming the frame material to match the cross-sectional shape and dimensions of the other frame member,

Next, a predetermined portion of each of the frame member materials is cut off to form each of the frame members. According to this molding method, the front frame and the rear frame constituting the frame are separated from each other. Are individually molded,
Furthermore, the frame can be formed more easily than a forming method of welding them together.

In particular, when the material of the frame is made of aluminum metal, the extrusion molding is extremely easy, and the molding of the frame is further facilitated.

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

For this reason, wrinkles are less likely to occur in the bent portion than when the frame member material or the frame member is bent in a direction along the virtual plane.

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

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

For this reason, the above-mentioned frame is used for forming the side frame of the vehicle body. In this case, since the bent portion is provided between the front frame and the rear frame constituting the side frame, the automobile is used. When a collision occurs, stress concentration tends to occur in the bent portion due to the impact force applied to the vehicle body. However, as described above, wrinkles due to bending are prevented from being generated in the bent portion, so that stress concentration is prevented from being generated in the bent portion, and the impact force can be sufficiently counteracted.

[Brief description of the drawings]

FIG. 1 is a partially enlarged view of FIG.

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

FIG. 3 is a simplified plan view of a front part of the automobile.

FIG. 4 is a partially enlarged partial development view of FIG. 2;

FIG. 5 is a sectional view taken along line 5-5 in FIG. 1;

FIG. 6 is a sectional view taken along line 6-6 of FIG. 1;

FIG. 7 is a sectional view taken along line 7-7 in FIG. 1;

FIG. 8 is a sectional view taken along line 8-8 in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automobile 2 Body 3 Body frame 11 Side frame (frame) 18 Intermediate side frame 21 Front frame 23 Rear frame 25 Bent part 29, 30 Frame member 29 ', 30' Frame member material 31, 32, 33, 34 Plate material 36, 37 Part 39 Binding plate 41, 42 Internal space 48, 51 Other part 56 Frame material 57 Part 59 Virtual plane X Front-back direction Y Orthogonal direction Z Vertical direction

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hisashi Takeuchi 4-3-1 Bingo-cho, Chuo-ku, Osaka-shi, Osaka F-term in Kobe Steel, Ltd. 3D003 AA01 BB01 CA09

Claims (5)

[Claims] 1. A plurality of frame members which extend in parallel in a certain direction, are formed in a box shape as viewed in a longitudinal direction thereof, and are adjacent to each other, and a longitudinal direction of one of these frame members is included. A part of the other frame member and at least a part of the other frame member in the longitudinal direction are integrally joined to each other, and a joining plate member forming a joining portion of the joined two portions is adjacent to each other as viewed in the line of sight. And a plate member that is located between the two internal spaces of the two frame members and forms a part of each of the frame members, extends integrally along the longitudinal direction, and has the same cross-sectional shape and dimensions. Frame. 2. A vehicle body frame in which the longitudinal direction of each frame member according to claim 1 and the front-back direction of the vehicle body are aligned, and the direction in which the frame members are adjacent to each other and the width direction of the vehicle body are aligned. Side frame. 3. The method of forming a frame according to claim 1, wherein a frame material extending linearly in a certain direction is extruded, and a cross section of each part of the frame material in a longitudinal direction has a box shape. Molding the frame material so as to include a plurality of frame member materials that are made adjacent to each other and that are integrally connected to each other over the entire length thereof, and that the frame member materials are connected to each other. Forming the frame material so that the connecting plate material is shared between the plate materials constituting a part of each of the frame member materials positioned between the two internal spaces of the adjacent frame member materials, and Of the two frame member materials, the cross-sectional shape of one frame member material matches the cross-sectional shape size of the one frame member, and the other frame member material has the same cross-sectional shape and size. The frame material is formed so that the cross-sectional shape of the frame member material matches the cross-sectional shape and size of the other frame member. Next, a predetermined portion of each of the frame member materials is cut off to form the frame member. A frame forming method for forming a member. 4. A virtual plane extending along the longitudinal direction of the frame material and extending along a direction in which the frame member materials are adjacent to each other, and the two frame members are oriented in a direction intersecting the virtual plane. The method of forming a frame according to claim 3, wherein the material or both frame members are bent integrally. 5. A vehicle body frame in which the longitudinal direction of each frame member according to claim 3 or 4 coincides with the front-back direction of the vehicle body, and the direction in which the frame members are adjacent to each other coincides with the width direction of the vehicle body. Side frame molding method.