WO2019184951A1

WO2019184951A1 - Lightweight vehicle door frame section

Info

Publication number: WO2019184951A1
Application number: PCT/CN2019/079872
Authority: WO
Inventors: 卢孝贵; 叶国强
Original assignee: 宁波敏实汽车零部件技术研发有限公司
Priority date: 2018-03-30
Filing date: 2019-03-27
Publication date: 2019-10-03

Abstract

Disclosed is a lightweight vehicle door frame section, the overall section being formed by extrusion molding of a light alloy material and comprising a pocket part (1) on a lower side and a column plate matching part (2) on an upper side, wherein a connecting transition part (3) is arranged between the pocket part (1) and the column plate matching part (2), a door stop caulking groove part (4) is provided on the right side of the connecting transition part (3), and the door stop caulking groove part (4) is formed by a protruding head (5) on a lower end face of a middle column matching part and an upwarp hook (6) on the right side of the connecting transition part (3). A downwards-inclined arc opening part (8) is provided between the pocket part (1) and the left side of the connecting transition part (3), and the left side of the downwards-inclined arc opening part (8) is lifted up to form a lower falling-off prevention part (9); and a smooth transition part (10) is provided on the left side of the connecting transition part (3), and the smooth transition part (10) extends rightwards in a bent mode to be directly connected to the column plate matching part (2).

Description

Lightweight automobile door frame cross section

[0001] The present invention relates to the technical field of automobile parts, and relates to an automobile door frame, and more particularly to a lightweight automobile door frame section.

Background technique

[0002] The automobile door frame is generally mainly formed by rolling a plurality of folded portions and having a complicated cross-sectional shape, and then installing a reinforcing center pillar plate in a lateral direction above the door frame section, and rolling out on one side of the door frame section. The first fitting portion is assembled for the lifting glass sealing strip, and the other side of the door frame section needs to be rolled out of the second fitting portion for the door weather strip to be assembled. The frame frame section of the structure is rolled by a stainless steel material. In this way, the cross-section of the automobile door frame is not only heavy, but also has a complicated process of rolling the cross-section. For example, the structure of the automobile door frame disclosed in the Chinese patent (publication number CN203937490), it can be seen that the entire door frame has to be rolled out at least on the left and right sides. The first fitting portion and the second fitting portion not only waste the entire door frame material, but also require a welding process after the roll forming, and the production process is cumbersome and complicated, and with the development of the lightweight technology, the overall vehicle is required to be lighter. , the quality is more reliable, and the use of light alloy materials to make the entire door frame section, it is necessary to break the existing car door frame Improvements.

Summary of invention

technical problem

Problem solution

Technical solution

[0003] The technical problem to be solved by the present invention is to provide a lightweight automobile door frame section with good overall strength, light weight, and low production cost in view of the current state of the art.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a lightweight automobile door frame section, characterized in that the overall section is extruded by a light alloy material, and the section includes a lower side pocket portion and an upper portion The upper column end portion of the column plate fitting portion extends straightly to the right, the upper end surface is an appearance matching surface, and the pocket portion and the column plate fitting portion have a connection transition portion, and the connection is a right side of the transition portion has a door stop groove portion, and the door stop groove portion is formed by a nose and a joint of the lower end surface of the center pillar fitting portion A rocker hook is formed on the right side of the transition portion, and a lower oblique arc portion is formed between the pocket portion and the left side of the connection transition portion, and the left side of the lower oblique arc portion is lifted upward to form a lower retaining portion, and the transition is connected. The left side of the portion has a smooth transition portion, and the smooth transition portion is bent to the right and directly connected to the column plate fitting portion.

[0005] The biggest innovation of the present invention is that the light-alloy material, such as aluminum alloy, can be used to form the entire section by an extrusion process. The biggest difference between the extrusion process and the rolling process is the self-section during extrusion. It has a certain thickness, not only the strength is good, but also the material is light. Here, in order to make the cross section of the entire automobile door frame lighter, the original groove that needs to be matched with the glass sealing strip is directly omitted, but the smooth transition part is directly used. It is connected with the column plate joint part. Here, it can be seen that the entire section structure only retains the structure of the lower oblique arc mouth portion, so that the upper left part of the entire section is directly omitted, which not only saves materials but also reduces production cost.

[0006] In the above-mentioned lightweight automobile door frame section, a roll-and-slide column plate is further mounted on the door frame section, and the roll-shaped middle column plate includes a main body, and the right end of the main body is bent and formed with a hook. The left side of the main body has a lower pressing rib portion and a locking hem portion, and the locking hem portion is attached to the left side surface of the connecting transition portion, the lower pressing rib portion, the locking hem portion, and The lower oblique arc portion constitutes a lifting recessed portion for assembling the glass sealing strip.

[0007] In the above-mentioned lightweight automobile door frame section, a glass sealing strip is installed in the lifting recess, and a locking member penetrates from the lifting recess to seal the glass sealing strip, the locking welt and the connection. Locking

[0008] Here, in order to install and fix the entire glass sealing strip, by changing the structure of the middle pillar plate, it can be seen that the left side of the cylindrical plate in the rolling bending has a lower pressing rib portion and a locking welt portion. Here, the main function of the lower pressing rib portion is to cooperate with the lower oblique arc portion, so that after the glass sealing strip is installed, the glass sealing strip can be blocked by the lower pressing rib portion and the lower oblique arc portion to prevent The entire glass sealing strip is dislodged, and in order to fix the cylindrical plate in the rolling, the locking gusset is attached to the connecting transition portion, and then the locking member is inserted from the lifting recess to seal the glass sealing strip, the locking hem and the connecting portion. The transition portion is locked, so that the glass sealing strip is pressed inwardly against the locking welt, and the lower pressing rib is pressed down against the glass sealing strip, so that material is saved even in the case where the upper left portion of the section is omitted. In the case of the same, the installation of the glass sealing strip and the center pillar plate can also be achieved, which reduces the production cost.

[0009] In the above-mentioned lightweight automobile door frame section, the door stop recessed portion is provided with an open weatherproof The opening weather strip is placed against the body sheet metal. Here, by opening the weather strip to match the body sheet metal and the door stop groove, the overall installation is ensured.

[0010] As an optimization, in the above-mentioned lightweight automobile door frame cross section, an upper retaining portion is integrally connected between the smooth transition portion and the column plate engaging portion, and the upper retaining portion is divided by the column The plate fitting portion extends straight to the left, and the upper end surface of the upper retaining portion and the upper end surface of the column plate fitting portion are on the same straight line, and the upper retaining portion and the lower retaining portion are formed for the lifting and sealing strip installation. Lift the recessed section.

[0011] In the above-mentioned lightweight automobile door frame section, a middle pillar plate is attached to the door frame section, and the pasting middle pillar plate is attached to the upper end surface of the upper retaining portion and the column plate fitting portion. The glass sealing strip is directly embedded in the lifting and embedding groove portion.

[0012] Here, the present invention can also adopt the left upper portion of the section without being omitted, and the upper left portion of the section is retained, and the extrusion is performed together. Here, the upper retaining portion and the lower retaining portion are used for preventing the peeling, and the center pillar plate is directly adhered. In the way of connection, here, since the upper end surface of the upper retaining portion and the upper end surface of the column plate fitting portion are on the same straight line, the position of the column plate in the whole installation is not bent, so that the middle column plate is directly used. The paste connection can also be used to complete the installation process of the entire car door frame section.

[0013] In the above-mentioned lightweight automobile door frame section, the door stop groove portion is provided with an open weather strip, and the open weather strip abuts against the body sheet metal. Here, by opening the weather strip to match the body sheet metal and the door stop groove, the overall installation is secure.

[0014] In the above-mentioned lightweight automobile door frame section, the door frame section further includes a door frame upper strip structure, the door frame upper strip structure includes a first component and a second component, and the first component and the second component respectively Extrusion molding separately, the first component and the second component are assembled with each other to form a main body of the entire door frame upper strip, the first component includes an integrally connected pocket portion and a connection assembly portion, and the connection assembly portion The second component includes an outer side end portion and a fitting assembly portion, and the fitting assembly portion is formed by extending downward from a middle portion of the outer side of the vehicle. The joint assembly and the fit assembly are combined such that the first member and the second member are combined into one unit.

[0015] In the above-mentioned lightweight automobile door frame cross section, the upper plane of the outer side end portion of the vehicle is an appearance surface, the appearance surface is anodized, and the left end of the lower plane of the outer side end portion of the vehicle protrudes downward. The protruding head is bent with a hook on the fitting assembly portion, and the space between the protruding head and the hook after the connecting assembly portion and the fitting assembly portion constitute a first fit for mounting the glass sealing strip groove. [0016] In the above-mentioned lightweight automobile door frame section, the right end portion of the lower plane of the vehicle outer end portion specifically has a bending protrusion, and the connection portion of the connection assembly portion and the pocket portion has The anti-de-bending arc groove, the space between the bending protrusion and the anti-de-bending arc groove constitutes a second matching groove for mounting the vehicle side sealing strip.

[0017] In the above-mentioned lightweight automobile door frame cross section, the connecting assembly portion and the bonding assembly portion have a locking member, and the connecting assembly portion and the bonding assembly portion pass the locking member. Combine into one.

[0018] In an above-described lightweight vehicle door frame cross section, the intermediate position of the lower plane of the vehicle outer end portion is convexly formed downwardly to form a lower stop portion, and the lower stop portion is fitted Between the assembly portions, there is an insertion space groove for assembling the connection assembly portion, and a snap member is mounted in the insertion space groove.

[0019] Compared with the prior art, the invention has the advantages that the light alloy material is extruded, and in the case of material saving, the glass sealing strip and the middle column plate can also be installed, and the installation is firm and reliable. The production cost is reduced; the original extrusion molding of the original door frame structure is changed into split extrusion molding, because the appearance surface is on the second component, so that only the second component is integrally placed in the anodizing bath. The oxidation can be performed so that the appearance surface on the second component can be required, and then the first component can be assembled after oxidation, thereby eliminating the oxidation of the prior first component, thereby saving oxidation cost and light weight. Easy to assemble and reduce production costs.

Advantageous effects of the invention

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of Embodiment 1 of a lightweight automobile door frame section;

2 is a schematic structural view of assembling other opponent parts of FIG. 1;

3 is a schematic structural view of Embodiment 2 of the lightweight door frame of the automobile;

[0023] FIG. 4 is a schematic structural view of FIG. 3 after assembling other opponent components;

[0024] FIG. 5 is a schematic structural view of Embodiment 3 of the lightweight car door frame upper strip structure;

6 is a schematic structural view of Embodiment 4 of the lightweight car door frame upper strip structure.

Invention embodiment

Embodiments of the invention

The following is a specific embodiment of the present invention and further describes the technical solution of the present invention with reference to the accompanying drawings. However, the invention is not limited to the embodiments.

[0027] In the figure, the pocket portion 1; the column plate fitting portion 2; the connection transition portion 3; the door stop groove portion 4; the boss 5; the hook 6; the weather strip 7 is opened; the lower oblique arc portion 8; Anti-dropping portion 9; smooth transition portion 10; rolling middle column plate 11; hook portion 12; lower pressing rib portion 13; locking hem portion 14; lifting groove portion 15; glass sealing strip 16; upper retaining portion 17; pasting the column plate 18; the first member 19; the second member 20; the pocket portion 21; the connecting assembly portion 2 2; the outer side end portion 23; the fitting assembly portion 24; the appearance surface 25; the protruding head 26; The hook 27; the first engaging groove 28; the bending protrusion 29; the anti-bending arc groove 30; the second engaging groove 31; the locking member 32; the lower stopper portion 33; the snap member 34;

Embodiment 1

[0029] As shown in FIG. 1 and FIG. 2, the lightweight cross-section of the door frame of the automobile is integrally formed by a light alloy material, and the cross section includes a lower pocket portion 1 and an upper column fitting portion 2, The upper end of the column plate fitting portion 2 extends straightly to the right, the upper end surface is an appearance matching surface, the pocket portion 1 and the column plate fitting portion 2 have a connection transition portion 3, and the right side of the connection transition portion 3 has a door stop groove portion 4 The door stop groove portion 4 is formed by the nose 5 of the lower end surface of the center pillar fitting portion and the rocking hook 6 connecting the right side of the transition portion 3, and the door stop groove portion 4 is provided with an open weather strip 7 to open the weatherproof The strip 7 abuts against the body sheet metal, here by opening the weather strip 7 to cooperate with the body sheet metal and the door stop groove portion 4 to ensure the integrity of the overall installation, between the pocket portion 1 and the left side of the connection transition portion 3 The lower oblique arc portion 8 is provided, and the left side of the lower oblique arc portion 8 is lifted upward to form a lower retaining portion 9, and the left side of the connecting transition portion 3 has a smooth transition portion 10, and the smooth transition portion 10 is bent to the right and directly extends The column plate mating part 2 is connected, here the biggest innovation of the invention Since the light alloy material, such as aluminum alloy, is used, the entire section can be formed by an extrusion process. The biggest difference between the extrusion process and the rolling process is that the section itself has a certain thickness during extrusion, and the strength is not only good. Moreover, the material is also light. Here, in order to make the cross section of the entire automobile door frame lighter, the original groove which needs to be matched with the glass sealing strip 16 is directly omitted, and the smooth transition portion 10 is directly connected to the column plate fitting portion 2, Here, it can be seen that the entire sectional structure retains only the structure of the lower oblique arc portion 8, so that the upper left portion of the entire section is directly omitted, which not only saves materials but also reduces production costs.

[0030] The rolling frame column 11 is further mounted on the cross section of the door frame. The rolling column plate 11 includes a main body, and the right end of the main body is bent and formed with a hook portion 12, and the left side of the main body has a lower pressing rib portion. 13 and the locking hem portion 14, the locking hem portion 14 is attached to the left side surface of the connection transition portion 3, the lower rib portion 13, the locking hem portion 14, and the lower slanting portion The arc mouth portion 8 constitutes a lifting and fitting groove portion 15 for assembling the glass sealing strip 16, and a glass sealing strip 16 is mounted in the lifting and embedding groove. A locking member 32 penetrates from the lifting and inserting groove to seal the glass sealing strip 16 and the locking edge portion. 14 and the connection transition portion 3 is locked, here, in order to install and fix the entire glass sealing strip 16, by changing the structure of the middle column plate, it can be seen that the left side of the column plate 11 in the rolling curve has a lower pressing rib. The portion 13 and a locking welt portion 14, wherein the main function of the lower pressing rib portion 13 is to cooperate with the lower oblique arc portion 8, so that after the glass sealing strip 16 is installed, it is just passed through the lower pressing rib portion 13 And the lower oblique arc portion 8 blocks the glass sealing strip 16 to prevent the entire glass sealing strip 16 from coming off, and in order to fix the rolling curved middle column 11, the locking welt portion 14 is attached to the connecting transition portion 3, and then passed. After the locking member 32 penetrates from the lifting recess, the glass sealing strip 16, the locking welt portion 14 and the connecting transition portion 3 are locked, so that the glass sealing strip 16 is pressed inwardly against the locking welt portion 14, and is pressed down. The rib portion 13 presses down the glass dense Article 16, so that even in a case where the upper left portion of the cross section is omitted, while saving material, also possible to seal the glass pillar and the mounting plate 16, reducing production costs.

Embodiment 2

[0032] As shown in FIG. 3 and FIG. 4, most of the structures of the present embodiment are similar to those of the first embodiment, except that the upper anti-detachment portion 17 is integrally connected between the smooth transition portion 10 and the column-plate fitting portion 2, The detaching portion 17 is formed by the column fitting portion 2 extending straight to the left, and the upper end surface of the upper retaining portion 17 and the upper end surface of the column fitting portion 2 are on the same straight line, the upper retaining portion 17 and the lower guard The detaching portion 9 forms a lifting and fitting groove portion 15 for mounting the lifting and lowering sealing strip, and a affixing middle column plate 18 is attached to the cross section of the door frame, and the affixing center pillar plate 18 is attached to the upper retaining portion 17 and the column plate engaging portion 2 On the end surface, a glass sealing strip 16 is directly embedded in the lifting and embedding portion 15, and an opening weather strip 7 is mounted on the door locking groove portion 4, and the weather strip 7 is opened to abut against the body sheet metal, where the weather is opened by opening The strip 7 cooperates with the body sheet metal and the door stop groove portion 4 to ensure the firmness of the overall installation. Here, the present invention can also adopt the left upper portion of the section without leaving the upper left portion of the section, and extrude together, here through The retaining portion 17 and the lower retaining portion 9 are prevented from coming off The center pillar plate is directly bonded, because the upper end surface of the upper retaining portion 17 and the upper end surface of the column fitting portion 2 are on the same straight line, so that the position of the column plate in the whole installation is not bent. Therefore, the pasting of the middle column plate 18 is directly used for the pasting connection, and the installation process of the entire automobile door frame section can also be realized.

Example 3

[0034] As shown in FIG. 5, the lightweight automobile door frame section further includes a car door frame upper strip structure, and the door frame upper strip The first member 19 and the second member 20 are separately extruded, and the first member 19 and the second member 20 are assembled to each other to form a main body of the entire door frame. A component 19 includes an integrally connected pocket portion 21 and a connecting assembly portion 22, the connecting assembly portion 22 is formed by an upwardly extending pocket portion 21, and the second member 20 includes a vehicle outer end portion 23 and a fitting assembly portion 24, The fitting assembly portion 24 is formed by extending downward from the middle of the vehicle outer end portion 23, and the connecting assembly portion 22 and the fitting assembly portion 24 are assembled such that the first member 19 and the second member 20 are combined into one body. The upper surface of the outer end portion 23 is the design surface 25, and the design surface 25 is anodized. The left end of the lower plane of the vehicle outer end portion 23 has a protruding head 26 protruding downward, and the bending is bent on the bonding assembly portion 24. The hook 27, after the connection assembly portion 22 and the fitting assembly portion 24 are assembled, the space between the protruding head 26 and the hook 27 constitutes a first fitting groove 28 for mounting the glass sealing strip, where the greatest innovation of the present invention is Mainly to change the overall extrusion of the original door frame structure into a sub-division Extrusion molding, where it can be seen that the first member 19 and the second member 20 are mutually extruded, where the first member 19 and the second member 20 are separated, and since the design surface 25 is at the second member 20 Therefore, it is only necessary to place the second component 20 as a whole in the anodizing bath for oxidation, so that the design surface 25 on the second component 20 meets the requirements, and then oxidizes and assembles with the first component 19, Before the previous first component 19 is oxidized, the oxidation cost is saved, the weight is light, the assembly is convenient, and the production cost is reduced. Further, the bonding assembly portion 24 can be matched with the connection assembly portion 22, and the protruding head 26 is attached. And the hook 27 can prevent the glass sealing strip from coming out after the glass sealing strip is installed into the first matching groove 28, thereby ensuring the stability of the installation.

[0035] The right end portion of the lower plane of the outer side end portion 23 of the vehicle has a bending protrusion 29, and the joint portion of the connecting portion 22 and the pocket portion 21 has an anti-bending arc groove 30, a bending protrusion 29 and an anti-bending portion The space between the arcing slots 30 constitutes a second mating slot 31 for the mounting of the vehicle side weather strip. Here, the bending protrusion 29 on the right side and the arcing prevention slot 30 can prevent the vehicle side sealing strip from coming out. The tightness of the cooperation with the body sheet metal has a locking member 32 between the connecting assembly portion 22 and the bonding assembly portion 24, and the connecting assembly portion 22 and the fitting assembly portion 24 are combined by the locking member 32 as a whole. The locking member 32 is directly locked, so that the assembly can be performed quickly and conveniently.

Embodiment 4

[0037] As shown in FIG. 6, most of the structure of this embodiment is similar to that of Embodiment 3, except that the first component 19 and the second component 20 are connected differently, and the lower plane of the vehicle outer end portion 23 is here. Intermediate position downward convex A lower stopper portion 33 is formed, and an insertion space groove 35 for attaching the connection assembly portion 22 is provided between the lower stopper portion 33 and the bonding assembly portion 24, and a snap member 34 is attached to the insertion space groove 35. Another method can be applied, in which the snapping is performed. Here, in order to ensure the position of the entire latching member 34, the formed lower retaining portion 33 and the insertion space groove 35 of the fitting assembly portion 24 are used to secure the latching member. The mounting position of the 34, and then the first component 19 is directly snapped into the latching member 34, i.e., the assembly of the first component 19 and the second component 20 is also achieved.

[0038] The specific embodiments described herein are merely illustrative of the spirit of the invention. A person skilled in the art can make various modifications or additions to the specific embodiments described, or in a similar manner, without departing from the scope of the invention.

Claims

Claim

[Claim 1] A lightweight automotive door frame section, characterized in that the overall section is extruded from a light alloy material, the section including a lower side pocket portion and an upper side column plate fitting portion, the column The upper end of the board engaging portion extends straightly to the right, the upper end surface is an appearance matching surface, the pocket portion and the column plate engaging portion have a connection transition portion, and the right side of the connecting transition portion has a door stop fitting portion. The door stop groove portion is formed by a protrusion of a lower end surface of the center pillar fitting portion and a rocker hook connecting the right side of the transition portion, and the pocket portion and the left side of the connection transition portion have a downward oblique arc portion. The left side of the lower oblique arc portion is lifted upward to form a lower retaining portion, and the left side of the connecting transition portion has a smooth transition portion, and the smooth transition portion is bent to the right and directly connected to the column plate engaging portion.

[Claim 2] A lightweight automobile door frame section according to claim 1, wherein a roll bending middle column is further mounted on the door frame section, and the rolling middle column plate includes a main body. The right end of the main body is bent and formed with a hook portion, and the left side of the main body has a lower pressing rib portion and a locking hem portion, and the locking hem portion is attached to the left side surface of the connecting transition portion, and is pressed down. The rib portion, the locking hem portion and the lower oblique arc portion constitute a lifting and fitting groove portion for assembling the glass sealing strip

[Claim 3] A lightweight automobile door frame section according to claim 2, wherein a glass sealing strip is installed in the lifting recess, and a locking member penetrates the lifting recess to form a glass dense The locking strip, the locking welt and the connecting transition are locked.

[Claim 4] A lightweight automobile door frame section according to claim 3, wherein the door stop groove portion is provided with an open weather strip, and the open weather strip abuts The body is on the sheet metal.

[Claim 5] A lightweight automobile door frame section according to claim 1, wherein the smooth transition portion and the column plate engaging portion are integrally connected with an upper retaining portion, and the upper guard The upper part of the upper part of the upper anti-off part and the upper end surface of the cooperating part of the column plate are on the same straight line, and the upper anti-off part and the lower anti-off part are formed for lifting The lifting recessed portion of the sealing strip.

[Claim 6] A lightweight automobile door frame section according to claim 5, wherein A middle pillar plate is also mounted on the cross section of the door frame, and the pasting middle pillar plate is attached to the upper end surface of the upper retaining portion and the column plate engaging portion, and the glass sealing strip is directly embedded in the lifting recessed groove portion

[Claim 7] A lightweight automobile door frame section according to claim 6, wherein the door stop groove portion is provided with an open weather strip, and the open weather strip abuts The body is on the sheet metal.

[Claim 8] A lightweight automobile door frame section according to claim 7, wherein the door frame section further includes a door frame upper strip structure, the door frame upper strip structure includes a first component and a second component, The first component and the second component are separately extruded separately, and the first component and the second component are assembled with each other to form a main body of the entire door frame upper strip, and the first component includes an integrally connected pocket portion and a connection assembly. The connecting portion is formed by extending a pocket portion, and the second member includes an outer side end portion and a fitting assembly portion, and the fitting assembly portion is intermediate between the outer side ends of the vehicle. Extending downwardly, the connecting assembly portion and the bonding assembly portion are combined such that the first component and the second component are combined into one body.

[Claim 9] A lightweight automobile door frame cross-section according to claim 8, wherein the upper surface of the outer side end portion of the vehicle is an appearance surface, and the outer surface of the vehicle is anodized, and the outer side portion of the vehicle is The left end of the lower plane protrudes downwardly with a protruding head, and a hook is bent on the fitting assembly portion, and the space between the protruding head and the hook is formed after the connecting assembly portion and the fitting assembly portion are assembled. A first mating slot for the glass seal to be installed.

[Claim 10] A lightweight automobile door frame section according to claim 9, wherein a right end portion of a lower plane of the vehicle outer side end portion has a bending protrusion, and the connection group The joint between the fitting portion and the pocket portion has an anti-de-bending arc groove, and the space between the bending protrusion and the anti-de-bending arc groove constitutes a second fitting groove for mounting the vehicle side sealing strip.

[Claim 11] A lightweight automobile door frame section according to claim 10, wherein the connecting assembly portion and the bonding assembly portion have a locking member, and the connecting assembly portion And the fitting assembly is integrated into a whole by a locking member.

[Claim 12] A lightweight automobile door frame section according to claim 11, wherein the intermediate position of the lower plane of the vehicle outer end portion is downwardly convexly formed with a lower stopper portion, Under An insertion space groove for fitting the connection assembly portion is disposed between the blocking portion and the bonding assembly portion, and a snap member is mounted in the insertion space groove.