JPH05510U - Car door - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an automobile door that is strong against impact load at the time of a collision or the like and that can surely achieve protection of passengers. [Structure] A shock absorbing material 2 having a length between a pair of mounting seats 8 provided on a door constituent member 1 inside a door of an automobile and mainly composed of a tubular material having an arbitrary cross-section such as a square or circular shape. The impact absorbing material 2 has a double-tube structure in the range of the required length L at the central portion in the longitudinal direction, and mounting portions 6 and 6 are formed at both ends. It is characterized in that it is fixed to the mounting seats 8 of the component 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automobile door, and more particularly to an automobile door that absorbs impact force in the event of a collision to protect passengers.

[0002]

[Prior Art]

 In the case of front engine type vehicles, there is an engine room in the front of the car body, and there is a required clearance between the front edge of the car body and the driver. The impact of the vehicle's shock absorption is mitigated to some extent on the driver, but the side of the vehicle body usually has only one door. Is inwardly bent and the occupant is directly impacted, which is extremely dangerous.

The thickness of this door is restricted due to the securing of space in the passenger compartment, and at the same time, the door has a lock mechanism, a door glass lifting mechanism, a power window type vehicle drive motor, etc. Since there is little spare space, the large space cannot be used as a reinforcing material for the door due to the small space and increase in vehicle body weight, and it was generally believed that the door was vulnerable to external impact.

From the above, various structural materials having a small volume and capable of withstanding a large load have been conventionally developed and used as a reinforcing material for a door. For example, as shown in the perspective view of FIG. 8 and the schematic cross section of FIG. 9, another flanged channel material C is welded to a steel mold B having two channel portions A and A with a flange at the X mark portion of FIG. However, even if the cross section is flat, a material that is strong against the force from the direction of the arrow F is internally provided as a beam member in the door to withstand external impact.

[0005]

[Problems to be solved by the device]

 However, when the above materials were used, for example, when an experiment was performed using a steel material having the dimensions shown in Fig. 9, it was possible to withstand a predetermined load value (about 160 kg) with almost no deflection, but the standard deflection If it exceeds the value (6 mm), the bending will proceed rapidly, and it will be in a so-called half-folded state and project toward the occupant side, defeating the purpose of protecting the occupant.

The above is not limited to the side door of the vehicle body, but the same problem occurs in the rear door of the vehicle body of the 5-door type.

In view of this, the present invention is to provide an automobile door that is strong against an impact load and can surely achieve the purpose of protecting an occupant.

[0008]

[Means for Solving the Problems]

 SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides a tubular material having an arbitrary cross-sectional shape such as a square or circular shape having a length extending between a pair of mounting seats provided in a door constituent member inside an automobile door. The impact absorbing material is mainly composed of, and the impact absorbing material has a double pipe structure in the required length range in the longitudinal center portion and mounting portions are formed at both ends. It is characterized by being fixed to the mounting seat of the door constituent member.

[0009]

[Action]

 Due to the above door structure, when an impact force is applied to the door from the outside, the impact absorbing material mounted across the central portion, which is the weakest part of the door, receives the impact absorbing material. Since the required length range of the central part in the longitudinal direction is a double pipe structure, the inclination and deflection due to the bending moment of the shock absorber are reduced, and the shock absorber does not break like being folded in two at the center. Therefore, it is possible to prevent the impact absorbing material from being broken and protruding into the vehicle body and damaging an occupant.

[0010]

【Example】

 Hereinafter, the present invention will be described with reference to the embodiments shown in the drawings.

FIG. 1 is a schematic diagram showing the structure of an automobile door according to the present invention, in which a shock absorbing material 2 is attached to a door constituent member 1 forming a skeleton of the door.

Since the shock absorbing material 2 is mainly composed of a tubular material such as a square pipe or a round pipe, the range of the required length L at the central portion in the longitudinal direction has a double pipe structure. As shown in FIGS. 2 and 3, this double pipe structure portion has another pipe member 4 externally fitted to the main pipe member 3, and the end portion of the pipe member 4 is attached to the outer peripheral surface of the main pipe member 3 as illustrated in FIG. It is fixed by fillet welding 5. The pipe member 4 may be fixed by inserting it inside the main pipe member 3 as shown in FIG.

Both end portions of the main pipe member 3 are flatly pressed by processing the end portions thereof as shown in FIG. 4 in the case of a rectangular pipe member and in FIG. 5 in the case of a round pipe member. 6 are formed, and the mounting portions 6 and 6 are formed with elongated hole-shaped mounting holes 7 and 7 extending in the axial direction of the main pipe material 3, and the mounting holes 7 and 7 of the mounting portions 6 and 6, respectively. It is fixed by fastening bolts 9 and 9 to the mounting seats 8 and 8 formed on the frame portion of the door constituent member 1. Note that this fixing may be performed by welding to the mounting seats 8 of the door component 1, instead of using the bolts 9.

The main pipe material 3 and the pipe material 4 each have a wall thickness of about 2 mm when made of a steel pipe, and the double pipe structure portion has a thickness of about 4 mm.

FIG. 7 shows an example of a mounting structure of the shock absorbing material 2. The left door of FIG. 7 is a case where it is mounted in a beam shape in two steps, and the right door of FIG. 7 is mounted in a cross shape. That is the case.

Since the vehicle door according to the present invention has the above-described structure, the impact absorbing member 2 receives the impact force when another vehicle collides from the outer surface side of the door, and the impact absorbing member 2 receives the impact force. Since the central part in the longitudinal direction of the structure has a double pipe structure with the pipe material 4, bending stress acts on the whole, but it is not concentrated in the central part, and only a bend occurs in the shock absorbing material 2, and it is folded in the middle. It does not bend into a shape. Therefore, an accident in which the shock absorber 2 is broken and pierced by an occupant in the vehicle body is not caused. Looking at this in a stress-strain diagram, as shown in FIG. 10, the conventional shock absorbing material suddenly yields and breaks at the time of maximum stress, whereas according to the present invention, it gradually yields, bends and bends. Take the process of absorption. Further, in the present invention, since the shock absorbing material 2 is attached to the mounting seats 8, 8 of the door constituting member 1 at both end mounting portions 6, 6, the shock absorbing material 2 and the door constituting member 1 are integrated. Buffers the shock, thereby further absorbing the shock. The pipe material is not limited to a ready-made pipe, but may be a welded pipe.

[0017]

[Effect of the device]

 As described above, according to the vehicle door of the present invention, the shock absorbing material mainly composed of the pipe material is mounted between the pair of mounting seats provided in the door constituting member inside the door, and the impact absorbing material Since the required length range in the central part of the longitudinal direction is a double pipe structure, the impact force applied from the outer surface side of the door is 2 at the central part in the longitudinal direction when it is received by the shock absorber together with the door constituent members. It does not fold in a fold, but is absorbed by the bending due to the entire curvature, and the occupant's protection is ensured. In addition, since the shock absorbing material itself is mainly composed of tubing, it is light in weight, and the weight of the vehicle body does not increase so much, and since it is made of tubing, it is easy to manufacture and inexpensive. You can get cheap, strong and safe car doors.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment showing the internal structure of an automobile door according to the present invention.

FIG. 2 is a plan view of the shock absorber in FIG.

FIG. 3 is a side view of FIG.

FIG. 4 is a perspective view showing an example of an end shape of the shock absorber of FIG.

FIG. 5 is a diagram corresponding to FIG. 4 in the case of a round pipe material.

FIG. 6 is a cross-sectional view showing an example of fixing a main pipe member and a pipe member fitted onto the main pipe member.

FIG. 7 is an explanatory diagram showing an example of incorporating a shock absorbing material.

FIG. 8 is a partial perspective view showing a conventional technique.

FIG. 9 is an end view showing an example of dimensions in FIG.

FIG. 10 is a stress-strain diagram at the time of impact between the present invention and the prior art.

[Explanation of symbols]

 1 Door component 2 Shock absorber 3 Main pipe 4 Pipe 6 Mounting part 7 Mounting hole 8 Mounting seat

Claims (1)

[Claims for utility model registration] [Claim 1] Mainly made of a tubular material having an arbitrary cross-sectional shape such as a square or circular shape having a length extending between a pair of mounting seats provided in a door constituent member inside an automobile door. An impact absorbing material is provided, and the impact absorbing material has a double-tube structure in the required length range of the central portion in the longitudinal direction and mounting portions are formed at both ends. An automobile door characterized by being fixed to a seat.