JP3443620B2 - Impact beam mounting structure for vehicle doors - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact beam mounting structure for suppressing deformation of a side door in a side collision of a vehicle. 2. Description of the Related Art Conventionally, as an impact beam mounting structure of this kind, a side door 1 is closed so that a door opening 6b formed on a side surface of a body 6a can be opened as shown in FIGS. The side door 1 has a door body 4 formed by joining peripheral edges of a door outer panel 2 and a substantially box-shaped door inner panel 3 having a rising portion 3a formed therearound.
A door glass 1c that moves up and down by lifting means 1a provided inside the door body 4, a hinge (not shown) for pivotally supporting the front end of the door body 4 to the front edge of the door opening 6b, and a rear end of the door body 4 And an impact beam 5 extending substantially horizontally inside the door body 4.
And those with The rising portion 3a of the door inner panel 3 has a main rising portion 3b and a main rising portion 3b.
b, a flange portion 3e joined by a hemming method to the periphery of the door outer panel 2 via an extension portion 3c for expanding the area of the door inner panel 3 and a small rising portion 3d facing the door outer panel 2; A flat space 4a is formed inside the door body 4 (FIG. 6). The lock device 9 is attached to the main rising portion 3b at the rear end of the door inner panel 3 so as to be located inside the door body 4, and the lock device 9 is detached from the rear edge of the door opening 6b facing the lock device 9. A striker 1d that locks as much as possible is attached (FIGS. 6 and 8). A front lower frame (not shown) and a rear lower frame 1b of elevating means are inserted into the door body 4 in a substantially vertical direction, and the door glass 1c is vertically movably held by these frames 1b. (FIG. 6). A part of the rear lower frame 1b is loosely inserted into a concave portion 9a formed at the front end of the lock device 9. The impact beam 5 is provided between the door outer panel 2 and the door glass 1 in the door body 4.
c, and is provided close to the door outer panel 2, and the rear end of the beam 5 has a main rising portion 3 b via a rear extension member 7 and a lock reinforcement 8.
And is fixed to the extension 3c via the rear extension member 7 (FIGS. 6 and 7). The rear end of the lock reinforcement 8 is interposed between the main rising portion 3b and the lock device 9, and the front end is bent forward toward the rear end of the impact beam 5 and the number of hit points in the center of the rear extension member 7 Y ₁ is fixed by 4 RBI spot welding (Figure 7). Lock Reinforcement 8
The rear end RBI number Y ₃ are fixed to each other with 3 RBI spot welded to the main rising portion 3b, the main rising portion 3b and the lock by being further secured by a locking device 9 three screws 9b to the door inner panel 3 It is interposed between the device 9 (FIG. 8). The rear end of the rear extension member 7 extends rearward from the locking device 9, RBI number Y ₂ is fixed by 5 RBI spot welded to the extended portion 3c (Fig. 7). In the impact beam mounting structure thus configured, when a load is applied to the center of the door body 4 from the side of the vehicle, the load is applied to the impact beam 5, the rear extension member 7, the lock reinforcement 8, the door inner panel. 3 is transmitted to the striker 1d through the rising portion 3a and the locking device 9, or through the impact beam 5, the rear extension member 7, the rising portion 3a of the door inner panel 3, and the locking device 9. The center and the rear end of the rear extension member 7 are the front end of the lock reinforcement 8 and the extended portion 3 of the rising portion 3a.
c is welded at 4 and 5 hit points, respectively, and the rear end of the lock reinforcement 8 is spot welded to the main rising portion 3b at 3 hit points, so that the mounting strength of the impact beam 5, that is, the deformation resistance of the door body 4 is improved. Can be maintained at or above a predetermined value. An impact bar having substantially the same structure as the above-mentioned conventional impact beam is disclosed in the related art of an impact bar mounting structure of an automobile door and a mounting method thereof (Japanese Patent Laid-Open No. 6-19127).
6). [0005] However, in the conventional impact beam mounting structure described above, a welding margin for spot welding the rear end of the rear extension member to the extended portion of the rising portion behind the locking device is required. And the distance M ₃ (FIG. 6) from the main rising portion to the small rising portion increases. As a result, the impact beam rear from the distance M ₁ to the rear end of the flange portion of the door inner panel becomes large, since the width of the door body increases, there is a problem that the manufacturing cost and weight are increased. If the welding margin is secured without increasing the width of the door body in order to solve this point, the width of the door glass, that is, the width of the door window is reduced by that much, and the degree of freedom in design is reduced or There is a problem that the visibility of the side of the vehicle from the door window is narrowed. An object of the present invention is to maintain the mounting strength of an impact beam, that is, the deformation resistance of a door body, at a predetermined value or more without increasing the size of the door in the width direction and reducing the width of the door glass. It is an object of the present invention to provide an impact beam mounting structure for a vehicle door. The structure of the present invention for achieving the above object will be described with reference to FIGS. 1, 2 and 5 corresponding to an embodiment. The present invention is formed by joining the peripheries of a door opening 10b formed in a body 10a and a substantially box-shaped door inner panel 13 having a door outer panel 12 and a main rising portion 13b formed therearound, and a front end thereof. Door body 1 pivotally supported by a front edge of door opening 10b via hinge 18 and closing door opening 10b in an openable manner.
4, a door glass 17 which is raised and lowered by lifting means 16 provided inside the door main body 14, and a door main body 14 at a main rising portion 13b of a door inner panel 13 at a rear end of the door main body 14.
A locking device 19 mounted so as to be located inside;
An impact beam 21 provided in the door main body 14 to extend substantially in the horizontal direction, and a rear end of the impact beam 21
Before being interposed between the rising portion 13b and the lock device 19
The end is bent toward the rear end of the impact beam 21
And a lock reinforcement 24, the impact beam rear end 21 of the improvement of the impact beam mounting structure of the vehicle door which is secured to the front end of the lock reinforcement 24 via a rear extension member 23. Its characteristic configuration is that a locking device 1 is provided in a recess 13f formed in the main rising portion 13b at the rear end of the door inner panel 13 so as to be recessed toward the rear end edge of the door opening 10b.
9, a wide portion 13h substantially perpendicular to the main rising portion 13b is formed integrally with the main rising portion above or below the concave portion 13f, and an upper or lower portion near the rear end or the rear end of the rear extension member 23 is formed. Rear extension
Of the mounting member 23 and the lock reinforcement 24.
It is fixed to the wide portion 13h above or below the attachment portion . [0008] Even if a load is applied to the center of the door body 14 from the side of the vehicle 10, the rear end of the rear extension member 23 or the vicinity of the rear end is the front end of the lock reinforcement 24,
Wide portion 13h formed integrally with main rising portion 13b
And impact beam 2
1 is maintained at a predetermined strength or more. Further, since the wide portion 13h to which the upper or lower portion near the rear end or the rear end of the rear extension member 23 is fixed is formed above or below the recess 13f, the rear end of the impact beam 21 and the rear end of the door body 14 To the door glass 17 without increasing the size of the door 11 in the width direction.
It is not necessary to reduce the width of the frame. Next, an embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 to 5, a door opening 10 b for an occupant to get on and off is formed on a side surface of the body 10 a of the automobile 10, and the door opening 10 b is releasably closed by a side door 11 which is a panel door. The side door 11 includes a door body 14 formed by joining peripheral edges of a door outer panel 12 and a door inner panel 13 to each other, a door glass 17 that is raised and lowered by lifting means 16 provided inside the door body 14, and a door body 14. Door opening 1 at front end
0b, a locking device 19 attached to the rear end of the door body 14, and an impact beam 21 extending substantially horizontally inside the door body 14.
And A door window 14a is formed in an upper part of the door body 14. The door inner panel 13 has a rising portion 13a around the door inner panel 13 which is bent toward the door outer panel 12.
(FIG. 1). The rising portion 13a includes a main rising portion 13b, an extending portion 13c connected to the end of the main rising portion 13b to extend the area of the door inner panel 13, and a small portion connected to the leading end of the extending portion 13c and facing the door outer panel 12. It has a rising portion 13d and a flange portion 13e which is provided at the tip of the small rising portion 13d and is joined to the periphery of the door outer panel 12 by a hemming method. The main rising portion 13b, the extending portion 13c, the small rising portion 13d, and the flange portion 13e are provided on the door inner panel 1.
3 are formed integrally by bending. A door window 14 formed on the upper part of the door body 14
a (FIG. 5), a door outer panel 12 and a door inner panel 13 joined to each other inside a door body 14.
This forms a flat space 14b (FIG. 1). A recess 13f is formed in the main rising portion 13b at the rear end of the door inner panel 13 toward the rear edge of the door opening 10b, and the lock device 19 is attached to the recess 13f so as to be located inside the door body 14. Can be Due to the formation of the concave portion 13f, the extended portion 13c has a narrow portion 13g having a narrow width behind the concave portion 13f and a relatively wide portion 13h having a relatively large width above and below the concave portion 13f (FIGS. 1, 2 and 4). A striker 22 for detachably locking the lock device 19 is attached to the rear edge of the door opening 10b facing the lock device 19 (FIGS. 1 to 3). A front lower frame (not shown) and a rear lower frame 16 which are components of the elevating means 16 are provided in the door body 14 below the door window 14a in a substantially vertical direction.
The frame 16a holds a door glass 17 for opening and closing the door window 14a (FIG. 1). The door glass 17 is moved up and down by an arm or motor (not shown) which is a component of the elevating means 16. It is supposed to. A part of the rear lower frame 16a is loosely inserted into a concave portion 19a formed at the front end of the lock device 19. In this example, the impact beam 21 is formed of a round pipe, and is provided between the door outer panel 12 and the door glass 17 in the door body 14 below the door window 14a and close to the door outer panel 12. The rear end of the beam 21 is fixed to a main rising portion 13b of the door inner panel 13 via a rear extension member 23 and a lock reinforcement 24. The front end of the beam 21 is fixed to a rising portion (not shown) at the front end of the door inner panel 13 via the front extension member 25 (FIG. 5). The front end of the rear extension member 23 is fixed to the rear end of the impact beam 21 by arc welding (FIG. 2). The rear end of the lock reinforcement 24 is the concave portion 13 of the main rising portion 13b of the door inner panel 13.
The front end is bent forward toward the rear end of the impact beam 21 and fixed to the rear end of the rear extension member 23 by spot welding (FIG. 1). The rear end of the lock reinforcement 24 is fixed to the recess 13f by spot welding and the locking device 19 is fixed to the door inner panel 13 by three screws 26, so that the locking device 19 is interposed between the recess 13f and the locking device 19. (FIGS. 1 and 3). The rear end of the rear extension member 23 is formed so as to be substantially the same as the rear end of the lock device 19, and is formed so as to extend vertically from the front end of the lock reinforcement 24 (FIGS. 1 and 2). Rear extension member 2 protruding above and below the front end of lock reinforcement 24
The upper and lower portions of the rear end of 3 are wide portions 13h of the expansion portion 13c.
Are fixed to each other by spot welding (FIGS. 2 and 4). In this example, the number of spots X ₁ for spot welding between the rear end of the rear extension member 23 and the front end of the lock reinforcement 24 is six, and the spot between the rear end of the rear extension member 23 and the wide portion 13h of the extension portion 13c is provided. In this example, the number of welding points X ₂ is three in the vertical direction (FIG. 2). Lock Reinforcement 24
The spot welding point number X ₃ of the recess 13f of the rear end and the main rising portion 13b in this example is 6 RBI (Figure 3). In the impact beam mounting structure for a vehicle door configured as described above, when a load is applied to the center of the door body 14 below the door window 14a from the side of the vehicle 10,
This load is applied via the impact beam 21, the rear extension member 23, the lock reinforcement 24, the main rising portion 13b of the rising portion 13a and the locking device 19, or the impact beam 21, the rear extension member 23, and the expanding portion 13c of the rising portion 13a. Of the striker 22 via the wide portion 13h and the lock device 19
Is transmitted to The rear end of the rear extension member 23 is pot welded to the front end of the lock reinforcement 24 at six points, and the rear end of the rear extension member 23 that projects above and below the front end of the lock reinforcement 24 is a door inner panel. The spot is welded to the wide portion 13h of the 13 extended portion 13c at three points.
Furthermore, since the rear end of the lock reinforcement 24 is spot-welded to the concave portion 13f of the main rising portion 13b at six points, the mounting strength of the impact beam 21, that is, the deformation resistance of the door body 14 can be maintained at a predetermined value or more. . Further, since the rear end of the rear extension member 23 is formed so as to be substantially the same as the rear end of the lock device 19, as shown in FIG. 1, from the concave portion 13f of the main rising portion 13b to the small rising portion 13d. distance L can reduce the distance L _3, thus from the rear end of the impact beam 21 to the rear end of the flange portion 13e of the door inner panel 13
₁ can be made smaller. As a result, the size of the side door 11 in the width direction does not need to be increased, and the width of the door glass 17 does not need to be reduced. It does not narrow your field of view. In the above embodiment, the narrow portion 13g of the extension portion 13c is provided in order to avoid interference due to poor accuracy of the rear end of the rear extension member 23. Without
The narrow portion 13g becomes unnecessary. In this case, the main rising portion 13b a distance L ₃ from the recess 13f to the small rising portion 13d of the becomes zero, the distance L ₁ from the rear end of the impact beam 21 to the rear end of the flange portion 13e of the door inner panel 13 further Can be smaller. Further, in the above embodiment, the upper and lower portions of the rear end of the rear extension member are projected upward and downward from the front end of the lock reinforcement, and the upper and lower portions of the rear end of the protruding rear extension member are respectively formed as wide portions of the extended portion. Although it is fixed, either the upper or lower part of the rear end of the rear extension member is projected above or below the front end of the lock reinforcement, and the upper or lower part of the rear end of the protruding rear extension member is formed as a wide portion of the extended portion. May be fixed. Further, in the above embodiments, the panel door is described as the side door, but a sash door or a sashless door may be used. Furthermore, the number of spot welding spots mentioned in the above embodiment is an example and is not limited to these. As described above, according to the present invention, a recess is formed in the main rising portion at the rear end of the door inner panel toward the rear edge of the door opening, and the recess is formed above the recess. Alternatively, a wide portion substantially perpendicular to the main rising portion is formed integrally with the main rising portion, and the upper or lower portion near the rear end or the rear end of the rear extension member is formed as a rear extension.
Above the fixing part of the member and the lock reinforcement
Or, even if a load is applied from the side of the vehicle to the center of the door body, the mounting strength of the impact beam, that is, the deformation resistance of the door body, is maintained at or above a predetermined value,
The deformation of the door body into the cabin is small. Further, with the above configuration, the distance from the rear end of the impact beam to the rear end of the door body can be reduced, so that the size of the door in the width direction is not increased and the width of the door glass is not reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view taken along the line AA of FIG. 2 showing an impact beam mounting structure for a vehicle door according to an embodiment of the present invention. FIG. 2 is a sectional view taken along line BB of FIG. 1; FIG. 3 is a sectional view taken along line CC of FIG. 1; FIG. 4 is a sectional view taken along line DD of FIG. 2; FIG. 5 is a side view of a main part of a vehicle including a door to which the impact beam is attached. FIG. 6 is a cross-sectional view showing a conventional example and corresponding to FIG. FIG. 7 is a sectional view taken along line EE of FIG. 6; FIG. 8 is a sectional view taken along line FF of FIG. 6; DESCRIPTION OF SYMBOLS 10 Automobile (vehicle) 10a Body 10b Door opening 11 Side door 12 Door outer panel 13 Door inner panel 13b Main rising portion 13f Recess 13h Wide portion 14 Door body 16 Lifting means 17 Door glass 18 Hinge 19 Lock device 21 Impact beam 23 Rear extension member 24 Lock reinforcement

Claims (1)

(57) [Claim 1] A door opening (10) formed in a body (10a).
b), the door outer panel (12) and the surrounding area (13)
b) is formed by joining peripheral edges of a substantially box-shaped door inner panel (13) formed with each other, and a front end is pivotally supported by a front end edge of the door opening (10b) via a hinge (18); A door body (14) for removably closing the door opening (10b), a door glass (17) which is moved up and down by elevating means (16) provided inside the door body (14), and the door body ( 14) The door body (1) is located at the main rising portion (13b) of the door inner panel (13) at the rear end.
4) Internally mounted locking device (19)
An impact beam (21) extending substantially horizontally inside the door body (14), and a rear end of the impact beam (21)
The main rising portion (13b) of the tunnel (13) and the locking device (19)
And the front end is the rear end of the impact beam (21)
Lock reinforcement bent towards (24)
With the door, in the impact beam mounting structure of anchored vehicle door at the front end of the rear end a rear extension member before Symbol lock reinforcement through (23) (24) of the impact beam (21), said door inner part Main rising part (13b) at the rear end of panel (13)
The lock device (19) is attached to a concave portion (13f) formed so as to be recessed toward a rear edge of the door opening (10b), and the main rising portion is located above or below the concave portion (13f). (13
b) wide portion which is substantially perpendicular (13h) is integrally formed with the main rise portion (13b) to the rear end or the vicinity of the rear end of the upper or lower said rear extension member of the rear extension member (23) ( twenty three)
And on the fixing part of the lock reinforcement (24).
The impact beam mounting structure for a vehicle door, wherein the impact beam mounting structure is fixed to the wide portion (13h) at one side or below .