JPH11180147A - Front door structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with load input with a simple structure without leading to cost increase. SOLUTION: This front door structure includes a belt line reinforcement 3 which is joined with a door inner panel 2 in such a way that it extends in the longitudinal direction of the vehicle, and a door sash 4 in which a rail groove 40 for guiding the vertical movement of a door glass is formed and a lower end thereof is connected to the door inner panel 2 such that the door sash 4 extends in the vertical direction of the vehicle. Further, an extruded portion 41 is formed in the door sash 4 adjacent to the rail groove 40 in the vehicle width direction. The extruded portion has a closed cross section at least in a state where the door sash 4 is connected. Also, a stopper portion 6 is formed on a rear end portion 30 of the belt line reinforcement 3 so that it interferes with the extruded portion 41 when the belt line reinforcement 3 moves relative to the side of the door sash 4 due to input of load from frontal side of the vehicle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt line reinforcement which is joined to a door inner panel so as to extend in the front-rear direction of a vehicle body, and a lower end thereof is joined to the door inner panel so as to extend in a vertical direction. And a door sash that guides the vertical movement of the door glass,
The present invention relates to a front door structure of an automobile having the same.

[0002]

2. Description of the Related Art A conventional front door structure of an automobile, particularly a structure around a lower end portion of a door sash for guiding vertical movement of a rear end portion of a door glass, is as shown in FIGS. There is something. In this type of structure,
The outer shape of the front door is constituted by the door outer panel 1 and the door inner panel 2, and the door inner panel 2 has a shape of a vehicle body protruding toward the internal space formed by the panels 1 and 2. The belt line reinforcement 3 is joined so as to extend in the front-rear direction. In other words, this belt line lean force 3
This secures the strength of the door opening.

[0003] A surface (rear surface) 20 extending in the vehicle vertical direction and extending in the vehicle width direction at the rear end side of the door inner panel 2 guides the vertically movable door glass disposed in the door opening. The lower end of the door sash 4 is joined so as to extend in the vertical direction. The door sash 4 has a guide groove 40 into which the rear end of the door glass is fitted and which guides the vertical movement of the door glass, and a bulging portion 41 adjacent to the guide groove 40 in the vehicle width direction. The guide groove 40 and the bulging portion 41 are formed integrally with the door sash 4 by, for example, bending a metal plate.

[0004]

Normally, a portion around the lower end of the door sash 4 and the rear end 30 of the belt line reinforce 3 is provided with a door mechanism such as a crank mechanism interlocked with a door lock knob or the like. Are provided with members and mechanisms related to door locking. For this reason, if the strength around the portion where the crank mechanism is provided is not sufficient, for example, when a load is input from the front of the vehicle body, the members and mechanisms related to the door locking are locked in a state where the door is locked. It is feared that it will be damaged. In order to avoid such a situation, the thickness of the door inner panel 4 and the belt line reinforcement 3 is increased in order to secure sufficient strength around the portion where the crank mechanism is provided. Have to do
This leads to higher costs.

The present invention was conceived in view of the above circumstances, and it is an object of the present invention to provide a front door structure capable of responding to a load input with a simple configuration without increasing the cost. Make it an issue.

[0006]

DISCLOSURE OF THE INVENTION In order to solve the above problems, the present invention takes the following technical measures.

That is, according to the present invention, a belt line reinforcement which is joined to the door inner panel so as to extend in the front-rear direction of the vehicle body, and a rail groove is formed to guide the vertical movement of the door glass. A door sash having a lower end joined to the door inner panel so as to extend in the vertical direction of the vehicle body and having a bulging portion formed adjacent to the rail groove in the vehicle width direction. The bulging portion has a closed cross-sectional structure at least in a state where the door sash is joined, and a rear end of the belt line reinforcement is provided with a load from the front side of the vehicle body. When the belt line reinforce is relatively moved to the door sash side by inputting, a stopper portion which can interfere with the bulging portion is formed. And wherein the Rukoto, automobile front door structure is provided.

In the above configuration, when a load is input from the front side of the vehicle body and the door inner panel is deformed and the belt line reinforcement moves relatively to the door sash side, the belt line reinforcement is moved. The stop portion provided at the rear end portion interferes with the bulging portion.

By the way, the door sash is joined to the door inner panel. At least in this state, the bulging portion bulges forward in the interior space of the front door and has a cross section. It has a closed section structure. For this reason, the bulging portion has a relatively high rigidity, and has a structure that is not easily deformed by a load input from the front side of the vehicle body.

Therefore, according to the present invention, even if the belt line reinforce moves relatively rearward due to a load input from the front side and the stopper portion interferes with the bulging portion, the bulging portion is prevented from moving. Due to the relatively high rigidity, the relative rearward movement of the belt line reinforcement is limited by the bulging portion. At this time, the load input to the bulging portion is distributed to a portion around the bulging portion. For this reason, deformation of the door inner panel when a load is input from the front side of the vehicle body is suppressed to some extent, and damage to members and mechanisms related to door locking is avoided. As described above, according to the present invention, it is possible to respond to a load input from the front side of the vehicle body with a simple configuration without increasing the cost.

The stopper may be provided integrally with the belt line reinforcement by modifying the shape of the rear end of the belt line reinforcement, or the extension member formed separately may be provided with the above-mentioned extension member. The extension member may be connected to the rear end of the belt line reinforcement, and may be configured as a stopper.

The bulging portion of the door sash may have a closed cross-sectional structure only by the shape of the door sash, or may have a closed cross-sectional structure when it is joined to the door inner panel. Is also good.

Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is an overall front view showing an example of a front door employing the front door structure according to the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. FIG. 4 is a perspective view of a main part showing a state in which the inside of the front door is viewed from the outer panel side. Note that the same reference numerals are given to members and elements equivalent to those shown in the drawings referred to for describing the conventional example.

As shown in FIGS. 1 to 3, in the above-mentioned front door structure, an outer shape of a front door 1A is constituted by a door outer panel 1 and a door inner panel 2, and the door inner panel 2 includes a vehicle body. The belt line reinforcement 3 is joined to the door sash 4 so as to extend vertically and the lower end of the door sash 4 extends longitudinally.

As shown in FIGS. 1 to 3, the door sash 4 includes an open rail groove 40 and a rail groove 4.
0 and a bulging portion 41 having a closed cross-section structure are formed respectively. The rail groove 40 and the bulging portion 41 are integrated with the door sash 4 by, for example, bending a metal plate. Formed in the body. The lower end of the door sash 4 configured as described above is joined to the rear surface 20 of the door inner panel 2 extending in the up-down direction of the vehicle body and expanding in the vehicle width direction. In such a joint state, the rail groove 40 is open to the front of the vehicle body, and the bulging portion 41 is projected to the front of the vehicle body. As shown in FIG. 2, the bulging portion 41 has a relatively high rigidity due to the closed cross-sectional structure, and is not easily deformed by a load input applied thereto. It has a configuration.

On the other hand, the upper end of the door sash 4 is connected to a window frame 6, and a door opening 5 is formed by the door sash and the window frame 6. A door glass 50 is disposed in the door opening 5 so as to be able to move up and down by a known method. A rear end of the door glass 50 is inserted into the rail groove 40, whereby the door glass 50 is The vertical movement is guided by the rail groove 40 of the door sash 4.

As shown in FIG. 3, the belt line reinforcement 3 has flanges 31 at both ends in the width direction, and has a hat-shaped cross section. The belt line reinforcement 3 extends in the front-rear direction of the vehicle body so that each of the flange portions 31
Is joined to the door inner panel 2 and the door opening 5
The strength has been increased. An extension member 6 is attached to the belt line reinforcement 3 so as to cover the rear end 30 and extend rearward to form a stopper.

As best seen in FIGS. 2 and 3,
The front end 63 of the extension member 6 has a hat-shaped cross section corresponding to the shape of the belt line reinforcement 3, and the portion 63 covers the rear end 30 of the belt line reinforcement 3. Thus, the extension member 6 is joined to the belt line reinforcement 4. The rear end of the extension member 6 is an upright portion 61 that stands in the vehicle width direction. When the extension member 6 is joined, as shown in FIG.
Faces the bulging portion 41 of the door sash 4. A bead 62 is formed on the upper surface of the extension member 6 and extends from the upright portion 61. The bead 62 enhances the rigidity of the extension member 6 in the longitudinal direction of the vehicle body.

When the load is input from the front side of the vehicle body and the door inner panel 2 is deformed, the belt line reinforcement 3 moves relatively to the door sash 4 side. At this time, the upright portion 61 of the extension member 6 attached to the rear end portion 30 of the belt line reinforcement 3 faces the bulging portion 41 of the door sash 4. 6 (standing portion 61) interferes with the door sash 4 (bulging portion 41).

As described above, the bulging portion 41 bulges toward the front side of the vehicle body, and its cross section has a closed cross-sectional structure, so that relatively high rigidity is secured. That is, in the above-described embodiment, even if the belt line reinforcement 3 relatively moves rearward due to a load input from the front side and the upright portion 61 interferes with the bulging portion 41, the bulging portion Since the belt line 41 has relatively high rigidity, the relative backward movement of the belt line reinforcement 3 is restricted.

For this reason, the deformation of the door inner panel 2 when a load is input from the front side of the vehicle body is suppressed to some extent, which is related to the locking of the door provided around the rear end of the belt line reinforcement 3. Damage to members and mechanisms is avoided. As described above, in the present embodiment, it is possible to respond to a load input from the front side of the vehicle body with a simple configuration without increasing the cost.

In the above-described embodiment, the extension member 6 formed separately is attached to the rear end 30 of the belt line reinforcement 3 and serves as a stopper. 3 by devising the shape of the rear end 30
Needless to say, a stopper may be provided integrally with the rear end 30 of the belt line reinforcement 3.

The swelling portion 41 of the door sash 4
May have a closed cross-sectional structure only by the shape of the door sash 4 as in the present embodiment, or may have a closed cross-sectional structure by joining a bulged portion 41 having an open rearward shape to the door inner panel 2. The swelling portion 41 may be secured by appropriate means.

[Brief description of the drawings]

FIG. 1 is an overall front view illustrating an example of a rear door employing a front door structure according to the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

FIG. 3 is a main part perspective view showing a state in which the inside of the front door is viewed from an outer panel side.

FIG. 4 is a sectional view of a main part showing a front door structure according to a conventional example.

FIG. 5 is a main part perspective view showing a state in which the inside of the front door according to the conventional example is viewed from the outer panel side.

[Explanation of symbols]

 1A Front door 2 Door inner panel 3 Belt line reinforcement 4 Door sash 30 Rear end (of belt line reinforcement) 40 Rail groove (of door sash) 41 Swelling part (of door sash) 50 Door glass

Claims (1)

[Claims] 1. A belt line reinforcement that is joined to a door inner panel so as to extend in the front-rear direction of the vehicle body, and has a rail groove formed to guide the vertical movement of the door glass and extends in the vehicle up-down direction. A door sash having a lower end joined to the door inner panel as described above and a bulging portion formed adjacent to the rail groove in a vehicle width direction, The bulging portion has a closed cross-sectional structure at least in a state where the door sash is joined, and a load is input to the rear end of the belt line reinforcement from the front side of the vehicle body so that the belt swells. When the line reinforcement is relatively moved to the door sash side, a stopper portion which can interfere with the bulging portion is formed, Front door structure of.