JPH0574928U - Door side beam structure - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a door side beam structure which can use a single part and can perform desired tuning only by a small amount of quenching work. [Structure] The door side beam 5 has a circular cross section and is made of a hardenable metal pipe such as iron, and has a hardened region 6 at the center thereof as shown by hatching, and Non-quenched regions 7 and 7 which are not quenched are provided adjacent to both sides of the quenched region 6 in the longitudinal direction. Therefore, when a load is input to the hardened region 6 having high rigidity at the time of a side collision of the vehicle, the stress of this load is outside the hardened region 6 having high rigidity and near the boundary with the non-hardened regions 7, 7 having low rigidity. The door side beam 5 bends near this boundary.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a door side beam that is installed inside a vehicle door.

[0002]

[Prior Art]

 Conventionally, as a door side beam horizontally installed inside the door of an automobile, the one shown in FIG. 9 has been proposed (see Japanese Utility Model Laid-Open No. 64-40720). That is, the door side beam 30 is composed of a long steel plate 41 and three metal pipes 33, 34, 35. The steel plate 41 is provided with parallel ridges 31, 32 along the longitudinal direction, and the metal pipes 33, 34, 35 are spaced between the ridges 31, 32 by welding. It is fixed. As a result, the bent portions 36, 37 are provided between the metal pipes 33, 34, 35 so as to have a lower rigidity than the other portions.

On the other hand, as shown in FIG. 10, the side door 38 is formed by a hemming connection between a door outer panel 39 on the outside O of the vehicle interior and a door inner panel 40 on the inside R of the vehicle interior. A space 42 is formed between 40. The door side beam 30 is horizontally installed in the space 42 so as to extend in the width direction of the side door 38, and both ends thereof are fixed to the door inner panel 40.

In such a structure, when a load F from the outside O of the passenger compartment toward the inside R of the passenger compartment is input in the case of a side collision of the vehicle, the outer door panel 39 is transformed into the inside R of the passenger compartment by this, The load F is pressed against the door side beam 30, and the load F is input to the door side beam 30 via the door outer panel 39. Then, the door side beam 30 is bent and deformed at the bent portions 36 and 37 which are set to have lower rigidity than other portions. That is, when the load F generated in a side collision is input, the door side beam 30 is tuned so that it bends at the bent portions 36, 37 between the metal pipes 33, 34, 35. The deformation of the door side beam 30 is standardized to suppress the reduction of the vehicle interior volume as much as possible.

[0005]

[Problems to be solved by the device]

 However, in such a conventional door side beam 30, three metal pipes 33, 34, and 35 are welded to the steel plate 41 on which the ridges 31 and 32 are formed, and the space between the pipes 33, 34, and 35 is increased. Tuning is performed by setting the bent portions 36 and 37 in the. Therefore, since the number of parts is large and the overall structure is complicated, and moreover, the press work for forming the ridges 31, 32, the cutting work for the pipes 33, 34, 35, the welding work, etc. are required, the manufacturing man-hour is also increased. There will be many. Therefore, the cost is high due to the large number of parts and man-hours required, and in order to surely bend the bent portions 36 and 37 when the load F is input, the relative cost is increased. Since it is necessary to increase the rigidity of the metal pipes 33, 34, and 35, it is necessary to quench all the metal pipes 33, 34, and 35, and the quenching work becomes long.

The present invention has been made in view of such conventional problems, and provides a door-side beam structure that can perform desired tuning by using a single part and with only a small amount of hardening work. The purpose is.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a door side beam horizontally installed in a space provided between a door outer panel located outside the vehicle interior and a door inner panel located inside the vehicle interior. The door side beam is a long metal pipe, and has a hardened region that has been hardened and a non-hardened region that has not been hardened in a longitudinally adjacent pattern.

[0008]

[Action]

 In the above configuration, when a load from the outside of the vehicle compartment toward the inside of the vehicle compartment is input in the case of a side collision of the vehicle, the door outer panel deforms toward the inside of the vehicle compartment and presses against the door side beam, and the load is applied to the door. It is input to the door side beam through the outer panel. At this time, since the hardened area and the non-hardened area are provided adjacent to each other in the longitudinal direction in a predetermined pattern on the door side beam, the hardened area and the non-hardened area corresponding to the hardened area are formed. Corresponding areas of low rigidity are adjacent in the longitudinal direction. Therefore, the stress of the load applied to the hardened area with high rigidity is concentrated outside the hardened area and near the boundary with the non-hardened area with low rigidity, and the doorside beam is outside this hardened area and in the non-hardened area. Bend near the boundary with. Therefore, by setting the hardened area and the non-hardened area in a predetermined pattern for tuning, the door side beam is bent and deformed in a form corresponding to the pattern.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. That is, as shown in FIGS. 2 and 3, the side door 1 disposed on the side of the vehicle body has a door outer panel 2 on the outside O of the vehicle interior and a door inner panel 3 on the inside R of the vehicle interior hemmed at the peripheral edge. A space 4 is formed between the panels 2 and 3 by being connected. In the space 4, a long door side beam 5 extending in the width direction of the side door 1 is laterally provided.

As shown in FIG. 1, the door side beam 5 is made of a hardenable metal pipe such as iron having a circular cross section, and has a hardened region in the central portion, which is hardened as shown by diagonal lines. 6 is provided. Further, on both sides of the hardened area 6, non-hardened areas 7, 7 which are not hardened are provided adjacent to the door side beam 5 in the longitudinal direction.

Both ends of the door side beam 5 are fixed to a recess 9 formed at one end of the bracket 8, and a flange 10 is formed at the other end of the bracket 8. As shown in FIG. 3, the flange 10 is fixed to a step portion 11 formed on the door inner panel 3 and facing the outside O of the vehicle compartment, whereby both ends of the door side beam 5 are fixed to each other. It is supported horizontally in the space 4.

In the present embodiment having the above-described configuration, when the vehicle collides sideways, as shown in FIG. 4, a load F from the vehicle exterior side O to the vehicle interior side R is input to the door outer panel 2. It As a result, the door outer panel 2 is deformed to the vehicle interior side R and is pressed against the door side beam 5, and the load F is input to the door side beam 5 via the door outer panel 2. At this time, since the door side beam 5 is provided with the hardened region 6 and the non-hardened regions 7, 7 adjacent to each other in the longitudinal direction, the region having high rigidity corresponding to the hardened region 6 and the non-hardened region. 7 and 7, which have low rigidity and are adjacent to each other in the longitudinal direction.

Therefore, the stress of the load F input to the hardened region 6 having high rigidity is concentrated outside the hardened region 6 having high rigidity and near the boundaries P and P with the non-hardened regions 7, 7 having low rigidity. However, the door side beam 5 bends at P and P near this boundary. Therefore, by setting the hardened area 6 and the non-hardened areas 7 and 7 in a predetermined pattern and performing tuning, the door side beam 5 can be bent and deformed in a form corresponding to the pattern.

Moreover, since the door side beam 5 is composed of a single member consisting of only a metal pipe, the number of parts is single and the structure is extremely simple, and the metal pipe is cut into a predetermined length. Since only the quenching region 6 needs to be quenched, the number of manufacturing steps is extremely small, the cost can be reduced, and the quenching work can be shortened. In particular, when quenching the quenching region 6 by induction hardening, the metal pipe is passed through the coil at a constant speed while the non-quenching regions 7, 7 pass through the coil. If the power supply to the coil is stopped and power is supplied to the coil only when the quenching region 6 passes, quenching can be easily performed only on the quenching region 6. Therefore, the door side beam 5 in which the quenching region 6 and the non-quenching region 7 are longitudinally adjacent to each other can be manufactured in an arbitrary pattern by a simple device that turns on / off the power supply of the coil at a predetermined time.

FIG. 5 shows a second embodiment of the present invention, in which the door side beam 5 is provided with side quenching regions 12, 12 at both ends and a central quenching region 13 is provided in the center. In addition, the non-hardened areas 7, 7 are provided between the side hardened areas 12, 12 and the central hardened area 13 over the areas shorter than the hardened areas 12, 12, 13.

In the second embodiment having such a pattern, when the load F at the time of a side collision of the vehicle is input, the stress of the load F input to the side hardenings 12, 12 having high rigidity and the central hardening The stress of the load F input to the region 13 is concentrated on the non-quenched regions 7 and 7 having low rigidity. Therefore, when a side collision occurs and the load F is input, the door side beam 5 surely bends in the non-quenched areas 7 and 7, and the tuning can be set more accurately.

FIG. 6 shows a third embodiment of the present invention, in which the door outer panel 2 is formed in a curved cross-section that bulges toward the vehicle interior side R. On the other hand, the quenching pattern of the door side beam 5 is similar to that of the first embodiment described above, and the quenching region 6 is provided in the central portion of the doorside beam 5 and the non-quenching region is adjacent to both sides of the quenching region 6. Areas 7 and 7 are provided. However, in this third embodiment, the bent portions 14 and 14 are further provided near the boundary between the hardened area 6 and the non-hardened areas 7 and 7, thereby avoiding the interference between the door side beam 5 and the door outer panel 2. Is configured to

That is, when the door outer panel 2 is bulged toward the vehicle interior side R in the vehicle body shaping as in this embodiment, the bent portion 14 is formed in the door side beam 5 in order to avoid interference with the door outer panel 2. , 14 must be formed. At this time, since the non-quenched regions 7 and 7 have much lower rigidity than the quenched region 6, providing the bent portions 14 and 14 in the non-quenched region 7 facilitates bending of the metal pipe. Therefore, the door side beam 5 can be processed into a shape corresponding to the door outer panel 2. Further, when the load F is input to the quenching region 6, stress concentrates on the bent portion 14, so that the door side beam 5 can be surely bent and deformed at the bent portion 14. ..

FIG. 7 shows a fourth embodiment of the present invention. Inside the door side beam 5, a small diameter pipe 15 made of metal and having the same size as the length of the quenching region 6 is inserted. Has been done. According to the fourth embodiment, by quenching the small diameter pipe 15 or not quenching it, the rigidity of the quenching region 6 can be tuned as well, thereby increasing the degree of freedom of tuning. You can

As shown in FIG. 8, the door side beam 5 is not hardened at all, and a small diameter pipe 15 with or without hardening is inserted into the door side beam 5. It is also possible to tune by increasing the rigidity only in the area where the small diameter portion 15 is inserted.

[0021]

[Effect of the device]

 As described above, in the door side beam structure according to the present invention, the metal pipe is provided with the quenching region and the non-quenching region adjacent to each other in the longitudinal direction. By performing the tuning by setting the above in a predetermined pattern, the door side beam can be bent and deformed in a form corresponding to the pattern. Moreover, since the door side beam is composed of a single member consisting of only a metal pipe, it has a simple number of parts and has a very simple structure. Since it is sufficient to quench the steel, the number of manufacturing steps is extremely small, the cost can be reduced, and the quenching work is short and short. As a result, it is possible to obtain a doorside beam with the desired tuning set at low cost, the number of single parts, and a short hardening work.

Further, since it is easy to bend the door side beam in the non-hardened region having low rigidity, the door side beam can be appropriately bent to avoid interference with the door outer panel. This makes it possible to easily form a door side beam having a shape corresponding to the door outer panel.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a front view of a side door provided with a door side beam according to the embodiment.

FIG. 3 is a sectional view taken along the line aa of FIG. 2 in the embodiment.

FIG. 4 is a cross-sectional view taken along line aa of FIG. 2 in a state in which a load F is input in the same example.

FIG. 5 is a perspective view showing a second embodiment of the present invention.

FIG. 6 is a sectional view taken along line aa of FIG. 2 showing a third embodiment of the present invention.

FIG. 7 is a perspective view showing a fourth embodiment of the present invention.

FIG. 8 is a perspective view showing another example of a tunable door side beam.

FIG. 9 is a front view showing a conventional door side beam.

FIG. 10 is a sectional view taken along line bb of FIG. 9 in a state in which the door side beam is arranged inside a side door.

[Explanation of symbols]

 1 Side Door 2 Door Outer Panel 3 Door Inner Panel 4 Space 5 Door Side Beam 6 Hardened Area 7 Non-Hardened Area 12 Side Hardened Area 13 Central Hardened Area

Claims (1)

[Scope of utility model registration request] 1. A door side beam horizontally installed in a space provided between a door outer panel located outside the vehicle interior and a door inner panel located inside the vehicle interior, wherein the door side beam is elongated. The door side beam structure, wherein the quenched and hardened regions and the non-quenched regions are provided adjacent to each other in the longitudinal direction in a predetermined pattern.