JP5736791B2 - Side door structure - Google Patents

Description

  The present invention relates to a side door structure.

  A side door structure in which a belt line reinforcement is provided in order to reliably transmit a front collision load to the belt line is known (for example, see Patent Document 1).

JP 2005-41266 A

  In the structure as described above, since the side door body is reinforced with a steel plate or the like separate from the side door body, an increase in the mass of the door and an increase in the number of parts (assembly man-hours) are caused.

  An object of the present invention is to obtain a side door structure capable of transmitting a front collision load from a front pillar to a rear pillar with a simple configuration.

The side door structure according to the first aspect of the present invention includes: a side door main body that removably closes the opening between a pair of front and rear pillars that form front and rear edges in an opening for passenger getting on and off; and the side door main body. An interior member that covers from the passenger compartment side, and an upper portion of the interior member that is positioned along the belt line of the side door body, are provided along the belt line over the entire length in the front-rear direction of the upper portion, and has a dilatant characteristic. Having a sheet material.

  In the side door structure according to claim 1, the sheet material provided on the upper portion of the interior member is assembled to the side door body together with the interior member. When a rearward impact load is input from the front pillar to the side door body at the time of a frontal collision of the vehicle, the seat material is immediately cured by the dilatant characteristic and functions as a tension rod. Thereby, the sheet material contributes to transmitting the front collision load to the rear pillar along the belt line.

  As described above, in the side door structure according to the first aspect, the load of the front collision can be transmitted from the front pillar to the rear pillar with a simple configuration.

  The side door structure according to a second aspect of the present invention is the side door structure according to the first aspect, wherein at least a part of the interior member on the side of the passenger compartment is a skin material made of a flexible material. It is configured by covering from the passenger compartment side.

  In the side door structure according to the second aspect of the present invention, the upper part of the interior member (the vehicle compartment side part) that is usually formed by covering a flexible sheet material with a skin material can obtain a flexible texture (tactile sensation). On the other hand, at the time of a frontal collision of the vehicle, the seat material contributes to the transmission of the front collision load from the front pillar to the rear pillar as described above.

  The side door structure according to a third aspect of the present invention is the side door structure according to the first aspect, wherein the upper portion of the interior member is made of a hard material and the sheet material is placed on the back side of the hard layer exposed to the vehicle compartment side. It is arranged and configured.

  In the side door structure according to claim 3, the sheet material provided in the hard layer of the interior member is disposed on the back side with respect to the design surface formed by the hard layer. It contributes to the transmission of street front impact load from the front pillar to the rear pillar.

  As described above, the side door structure according to the present invention has an excellent effect that it is possible to transmit the load of the front collision from the front pillar to the rear pillar with a simple configuration.

It is a figure which shows the side door which concerns on the 1st Embodiment of this invention, Comprising: It is an expanded sectional view along the 1-1 line | wire of FIG. It is a figure which shows the side door which concerns on the 1st Embodiment of this invention, Comprising: It is an expanded sectional view along the 2-2 line of FIG. 1 is a side view showing a part of an automobile to which a side door according to a first embodiment of the present invention is applied. It is sectional drawing corresponding to FIG. 1 which shows the side door which concerns on the 2nd Embodiment of this invention. It is sectional drawing corresponding to FIG. 2 which shows the side door which concerns on a comparative example.

  The side door 10 to which the side door structure according to the first embodiment of the present invention is applied will be described with reference to FIGS. Note that an arrow FR appropriately shown in the drawing indicates a forward direction in the vehicle longitudinal direction, an arrow UP indicates an upward direction in the vehicle vertical direction, and an arrow OUT indicates an outside in the vehicle width direction.

  3 shows a side view of a part of the automobile A to which the side door 10 is applied as seen from the vehicle interior side. FIGS. 1 and 2 are taken along line 1-1 of FIG. An enlarged cross-sectional view and an enlarged cross-sectional view along line 2-2 are respectively shown.

  As shown in FIG. 3, the side door 10 opens and closes an occupant getting-on / off opening 12 formed in the automobile A. In this embodiment, the side door 10 is formed between the front pillar 14 and the center pillar 16. It is a front side door that opens and closes the opening 12 for the front seat. The opening 12 is formed by being surrounded by a front pillar 14, a center pillar 16, a rocker 18 that connects these lower ends, and a roof side rail (not shown).

  As shown in FIG. 2, the front pillar 14 includes a pillar inner 14 </ b> A, a pillar outer (cycle outer) 14 </ b> B, and a pillar reinforcement 14 </ b> C as a closed cross-section structure. Inside the front pillar 14, a load transmission member 14D for transmitting a load from the front wall of the closed section to the rear wall is disposed. The load transmission member 14 </ b> D may be a dedicated component or may have a configuration that also serves as a functional component such as a hinge bracket. The center pillar 16 includes a pillar inner 16A, a pillar outer (cycle outer) 16B, and a pillar reinforcement 16C as a closed cross-section structure. In FIG. 2, the weather strip 15 is interposed between the front pillar 14, the center pillar 16, and the side door 10.

  As shown in FIG. 1, the side door 10 includes a side door main body 20 and a door trim 22 as an interior member that covers the vehicle compartment side of the side door main body 20. The side door main body 20 is configured as a hollow structure by joining the door outer panel 24 and the door inner panel 26 made of steel plates together by hemming or the like at the peripheral edges of each other. In the space of the side door main body 20, a frame (not shown) for guiding the impact beam 28 and the window glass 30 to be movable up and down, a power window device (not shown) for raising and lowering the window glass 30, and the like are arranged.

  The door trim 22 includes a door trim main body 32 and a door trim upper 34 as an upper portion of the door trim provided on the upper portion of the door trim main body 32 along the belt line BL of the side door 10. Between the lower part of the door trim main body 32 and the side door main body 20 (door inner panel 26), an energy absorbing member (EA pad) 36 for absorbing impact of side collision is disposed. In this embodiment, the lower portion of the door trim main body 32 is configured by applying a texture or the like to the surface (surface on the passenger compartment side) of the base material 32A such as a relatively hard resin. The part except the lower part of the door trim main body 32 is configured by attaching a skin material 32B forming a design surface to the surface of the base material 32A.

  The door trim upper 34 is configured by covering the surface side of the base material 34A with a skin material 34B. The base material 34A is made of, for example, a hard resin material, and the skin material 34B is made of a soft material (for example, a synthetic resin sheet or a fabric). It is folded at the upper and lower edges of 34A to cover a part of the back surface (on the side opposite to the vehicle compartment) of the base material 34A.

  In the side door 10, the door trim upper 34 is provided with a sheet material 38 having a dilatant characteristic. The sheet material 38 is sandwiched between the base material 34A constituting the door trim upper 34 and the skin material 34B along the belt line BL and over substantially the entire length in the front-rear direction. In this embodiment, the upper and lower ends of the sheet material 38 are folded back at the upper and lower edges of the base material 34A and are wound around the back surface side of the base material 34A.

  The sheet material 38 is formed into a sheet shape by, for example, “d3o” (registered trademark) manufactured by d3olab in the UK, and has a dilatant characteristic as described above. Accordingly, the sheet material 38 maintains flexibility in a state in which no impact is applied or in a state in which a weak impact (change in load over time) is applied. For example, when a strong impact such as a collision is applied, the sheet material 38 is instantaneous (immediately). It is supposed to harden.

  As shown in FIG. 2, the door trim upper 34 is configured to be sandwiched between the front pillar 14 and the center pillar 16 via the weather strip 15 so that the side door 10 closes the opening 12 so that a load can be transmitted. ing.

  Next, the operation of this embodiment will be described.

  In the above-described side door 10, the sheet material 38 normally maintains flexibility, so that the touch feeling with respect to the door trim upper 34 is flexible. That is, a so-called soft type trim portion is formed.

  When the automobile A reaches a frontal collision, the load F is input to the side door 10 via the front pillar 14 as shown in FIG. The sheet material 38 of the door trim upper 34 that has received this front impact load is instantly cured by the dilatant characteristics. Then, as shown in FIG. 2, the front collision load F is applied to the first path (see arrow F <b> 1) passing through the door inner panel 26 constituting the side door main body 20, and the sheet material 38 provided in the door trim upper 34. It is transmitted to the center pillar 16 through a route including a second route (see arrow F2) that passes through.

  Here, in the side door 100 according to the comparative example shown in FIG. 5, the trim upper 102 is configured as a soft type trim portion by sandwiching a urethane foam or the like (not shown) between the base material and the skin agent. 38. For this reason, the trim upper 102 of the side door 100 does not constitute a load transmission path for transmitting the front collision load F from the front pillar 14 to the center pillar 16. Therefore, in the side door 100, the burden (sharing) of the front collision load by the side door main body 20 becomes large, and the addition of reinforcing members such as the inner reinforcement 104 is required. The addition of the inner reinforcement 104 brings about an increase in the number of steel parts constituting the side door body 20 (side door 100), an increase in assembly man-hours such as spot welding, and an increase in the mass of the side door 100 and hence the automobile A. In addition, the addition of the inner reinforcement 104 requires a countermeasure against a reduction in energy absorption space (stroke) with respect to a side collision.

  On the other hand, in the side door 10, the sheet material 38 provided on the door trim upper 34 forms the load transmission path indicated by the arrow F2 in FIG. Since the sheet material 38 functions as a tension rod for the front impact load, the load transmission burden (sharing) on the side door body 20 side is reduced. For this reason, in the side door 10, the transmission performance of a required front collision load is securable without providing the inner reinforcement 104 requested | required by the side door 100. FIG.

  Thereby, in the side door 10, the increase in the number of steel parts with respect to the side door main body 20 resulting from the addition of the inner reinforcement 104, an increase in assembly man-hours such as spot welding, and the increase in the mass of the side door 10 itself and the automobile A as a result. Is prevented. Moreover, in the side door 10, the energy absorption space (stroke) with respect to a side collision can be set large as much as the inner reinforcement 104 is not provided. For this reason, the countermeasure against a side collision is unnecessary or can be simplified compared with the side door 100.

  Further, in the side door 10, since the sheet material 38 has a dilatant characteristic, the above-described load transmission path is formed at the time of the front collision, and a soft tactile sensation can be given to the door trim upper 34 at the normal time. That is, both the flexibility of the door trim upper 34 (door trim 22) and the load transferability (impact resistance) at the time of a front collision can be achieved.

  As described above, in the side door 10 according to the first embodiment, the load of the front collision can be transmitted from the front pillar to the rear pillar with a simple configuration.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. Note that parts and portions that are basically the same as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted.

  4 shows a side door 50 according to a second embodiment of the present invention in a cross-sectional view corresponding to FIG. As shown in this figure, the side door 50 is different from the side door 10 according to the first embodiment in that the side door 50 includes a door trim 54 having a door trim upper 52 instead of the door trim upper 34.

  The door trim upper 52 constituting the door trim 54 has a base 52A made of a hard resin material as a hard layer and exposed to the passenger compartment to form a design surface. The design surface of the base material 52A is subjected to processing for improving the texture such as embossing. And in the side door 50, the sheet | seat material 38 is provided in the back surface of the door trim upper 52, ie, the surface at the side of a half vehicle compartment. Thereby, the sheet material 38 is provided in the door trim upper 52 so as not to impair the texture (aesthetics) of the so-called hard type door trim upper 52. Other configurations of the side door 50 are the same as the corresponding configurations of the side door 10 including portions not shown.

  Therefore, the side door 50 according to the second embodiment basically also includes the first embodiment except for the effect that the sheet material 38 achieves both the flexibility at the normal time and the load transmission at the time of the front collision. The same effect can be obtained by the same operation as the side door 10 according to the above.

  In each of the above embodiments, the side doors 10 and 50 are front side doors. However, the present invention is not limited to this example. For example, the side doors 10 and 50 may be rear side doors. . The side doors 10 and 50 are not limited to hinged doors, and the present invention can be applied to various side doors such as slide doors and gull-wing doors.

  Moreover, in each above-mentioned embodiment, although the side door main body 20 showed the example comprised by the door outer panel 24 and the door inner panel 26 which consist of steel plates, this invention is not limited to this, For example, resin-made You may apply this invention to a side door main body. Similarly, the present invention may be applied to a vehicle in which the skeleton on the vehicle body side, that is, the skeleton including the front pillar 14 and the center pillar 16 is made of resin.

  Furthermore, in the above-described first embodiment, the example in which the sheet material 38 is disposed between the base material 34A and the flexible skin material 34B has been shown, but the present invention is not limited to this, and for example, the base material 34A A sheet material 38 may be disposed between the cover and a hard skin material such as a wood grain panel. Moreover, it is good also as a structure which affixes hard skin materials, such as a wood grain panel, on the surface of 52 A of base materials in 2nd Embodiment.

  Furthermore, in each of the above-described embodiments, the example in which the “d3o” (registered trademark) is used as the sheet material 38 has been shown. However, the present invention is not limited to this, and various types may be used as long as they have dilatant characteristics. Sheet material can be used.

10 Side door (side door structure)
12 Opening 14 Front pillar 16 Center pillar 20 Side door body 22 Door trim (interior member)
34 Door trim upper (upper part of interior parts)
34A Base material 34B Skin material 38 Sheet material 50 Side door (side door structure)
52 Door trim upper (upper part of interior parts)
52A Base material 54 Door trim (interior member)
BL belt line

Claims (3)

Between a pair of front and rear pillars forming front and rear edges in an opening for occupant getting on and off, a side door body that closes the opening so as to be openable,
An interior member that covers the side door body from the passenger compartment side;
The upper part of the interior member positioned along the belt line of the side door main body is provided along the belt line over the entire length in the front-rear direction of the upper part, and has a dilatant characteristic,
Side door structure with   The side door structure according to claim 1, wherein at least a part of the interior side of the interior member is configured to cover the seat material from the interior side with a skin material made of a flexible material.   2. The side door structure according to claim 1, wherein an upper portion of the interior member is configured by arranging the sheet material on a back surface side of a hard layer made of a hard material and exposed to a passenger compartment.

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