JPH061460Y2 - Car door structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Use) The present invention relates to a vehicle door structure, and more particularly to a weather strip for sealing a gap between a door and a vehicle body.

(Prior Art) Generally, an automobile door including a door body and a door sash formed above the door body seals the door and the body to prevent unnecessary intrusion of water, outside air, or the like into the vehicle interior. A weather strip is provided to prevent this.

BACKGROUND ART Conventionally, a weather strip of an automobile is curved in an endless shape so as to match an outer shape of a door, the weather strip is fixed to a door body by a fastener or the like, and a side of a door sash is provided on an outer periphery of the door sash. A part of the weather strip is fitted and mounted in the mounting groove provided. Therefore, according to the above structure, since the weather strip on the door sash side is merely fitted in the mounting groove, the weather strip gradually shifts toward the rear of the vehicle due to sliding resistance due to opening and closing of the door. The weather strip is deflected at the rear part and sealing cannot be sufficiently performed, which is not preferable in terms of appearance. Further, when the flexible portion is sandwiched between the door and the vehicle body by opening and closing the door, the weather strip may be damaged.

As a solution to the above problem, a structure for preventing the movement of the weatherstrip has been devised by attaching a weatherstrip retaining member to the door sash and fitting the displacement retaining member into a portion of the weatherstrip held by the sash. (For example, Japanese Utility Model Laid-Open No. 60-85215).

However, in the structure as described above, the shift preventing member must be separately manufactured and attached to the sash, the number of assembling steps increases, and the cost becomes expensive. Further, at the time of assembling, there is a drawback that it is difficult and difficult to assemble because the shift preventing member is hard to see.

(Purpose of the Invention) The present invention has been made in view of the conventional problems as described above, and the door sash and the weather strip do not need to be separately processed to prevent slippage, and thus the production cost can be reduced. It is an object of the present invention to provide an automobile door structure that is inexpensive, can be assembled by a conventional method, and does not cause the weather strip to bend when the door is opened and closed.

(Structure of the Invention) The structure of the present invention for achieving the above object is characterized in that the moving force of the weather strip toward the rear side of the vehicle body due to the sliding resistance generated when the door is opened and closed is the opening and closing fulcrum side of the door. That is, in view of the fact that the first sash side is the largest and gradually decreases toward the rear, the lower part is connected to the upper part of the door body hinged to the vehicle body and the lower part is connected to the upper part of the door body on the hinge side. A first sash extending upward, a second sash extending rearward from an upper end of the first sash to form an upper end, and a third sash extending downward from a rear end of the second sash and connected to an upper portion of the door. A door sash consisting of a sash is provided, and an automatic weather strip is provided which is attached to the door body and the outer peripheral edge of each of the sashes to seal the vehicle body. In a car door, the tension of the weather strip of the portion mounted in the first sash in the extended state is applied to the weather strip of the portion mounted in the second sash in the extended state. That is, the tension is set to be larger than the tension when the strip is mounted on the second sash.

Furthermore, in setting the tension in the magnitude relation as described above, the elongation rate with respect to the natural length of the portion of the weatherstrip attached to the first sash in the state of being attached to the first sash is defined by the second extension. It is set to be larger than the elongation rate of the weather strip of the portion to be attached to the sash with respect to its natural length when attached to the second sash.

Further, in the same manner as described above, in setting the tension in the magnitude relation as described above, the cross-sectional area of the weather strip of the portion to be attached to the first sash in the direction orthogonal to the length direction is set to the second sash. It is set to be larger than the same cross-sectional area of the weather strip at the portion to be mounted.

In addition, the above-mentioned "tension" means the force that each weather strip tries to restore (shrink) to its natural length in a state where the weather strip of each of the above parts is attached to the corresponding sash portion. That is.

(Effect of the Invention) According to the vehicle door structure of the present invention, a return force in a direction opposite to the moving direction of the weather strip due to sliding resistance generated when the door is opened / closed is generated in the weather strip according to the moving force. Therefore, it is possible to prevent the weather strip from being bent, and it is possible to eliminate poor sealing, poor appearance, and damage to the weather strip. Further, it is not necessary to provide a slip prevention member as in the conventional case, and the assembling on the door sash side is only fitted into the mounting groove,
Easy to assemble. And the number of parts can be reduced,
The cost can be reduced.

(Embodiment) An embodiment according to the present invention will be described below with reference to the drawings.

1 to 4 show the door structure according to the present invention applied to a rear side door of an automobile.

The rear side door 1 is composed of a door body 2 and a door sash 3 and is pivotally attached to a vehicle body 5 via a hinge member 4 and a weather strip 6 is attached along a peripheral edge portion of the rear side door 1. . The weather strip 6 is formed by an elastic member so that the cross-sectional areas thereof in the direction orthogonal to the length direction thereof are substantially the same, and is curved so as to match the outer shape of the rear side door 1. Three
As shown in the figure, the side fixed by the fastener 7 and attached to the door sash 3 is attached by being fitted in the attachment groove 8 formed on the outer periphery of the door sash 3 in an extended state. As shown in FIG. 1, the sash portion 3 includes a first sash 3a which is connected to an upper portion of the door body 2 on the hinge side and extends upward, a second sash 3b which extends rearward from an upper end of the first sash 3a, and a second sash 3b. 2 sash 3
The third sash 3c extends from b to the upper edge of the door body 2. Then, as shown in FIG. 1, the sash is formed so that the respective dimensions of the sash are A for the first sash 3a, B for the second sash 3b, and C for the third sash 3c, and the sash is attached to each sash. The natural length of each side of the weather strip 6 is a for the side attached to the first sash 3a, b for the side attached to the second sash 3b, and c for the side attached to the third sash 3c. It is formed so that. Here, the extension rate of each side of the weather strip 6 attached to the sash portion 3 with respect to the natural length of each side of the corresponding weather strip 6 in the extended extension attachment state to the corresponding sash portion 3, (Aa) / a} × 100, {(Bb) / b} × 100, {(Cc) / c} × 100, and in this example, the relationship between the respective expansion rates is {(Aa) / a}. It is configured such that × 100> {(Bb) / b} × 100> {(Cc) / c} × 100.

That is, Hooke's law (eg, "Mechanics of Materials"
[Published by Nikkan Kogyo Shimbun on October 20, 1980] No. 1
According to (Page 2 to page 13 1.4, section on stress and elastic coefficient), since the vertical stress σ and the longitudinal strain ε are in a proportional relationship, when the longitudinal elastic coefficient is E, σ = E · ε is there. If the load that causes σ is W and the cross-sectional area of the plane orthogonal to this load direction is A, then σ = W / A, and the longitudinal strain ε
(Referred to in the present invention "elongation"), since a lambda (expansion amount from the natural length) / 1 ₀ (natural length), these sigma = W / A, the epsilon = lambda / 1 _0, sigma = E ・ ε
Substituting into, W = A · E · λ / 1 0 next, A time (cross-sectional area in the direction orthogonal to the longitudinal direction of the weather strip) is constant, W and lambda / 1 ₀ (in the present invention (tension) say "elongation" is proportional also, lambda / 1 ₀ when (referred to in the present invention "elongation") is constant, a the (cross-sectional area in the direction orthogonal to the longitudinal direction of the weather strip) W (tension ) Is a proportional relationship, and this proposal is constructed in view of the above.

With the above configuration, the cross-sectional area in the direction orthogonal to the length direction of the weather strip is substantially constant, but since the extension rate is set as described above, the weather strips attached to each sash The tension is set larger in the order of the first sash side, the second sash side, and the third sash side. As a result, the return force in the direction opposite to the moving direction of the weather strip due to the sliding resistance generated in the weather strip when the door is opened and closed is It can be generated in the weather strip according to the moving force, and the deviation of the weather strip toward the rear of the vehicle body can be prevented.

In the present embodiment, the first sash extending upward from the hinge-side upper portion of the door body, the second sash extending rearward from the upper end of the first sash, and the third sash extending from the second sash to the upper edge of the door body. The effect is obtained by changing the tension of each side of the weather strip attached to each of the above, but each side of the weather strip attached to each of the two sashes of the first sash and the second sash is simply obtained. The effect is fully exerted even by changing the relationship of the tension.

Further, in the above embodiment, the cross-sectional area in the direction orthogonal to the length direction of the weather strip is substantially constant, and the weather strip portion mounted on the second sash in an extended state,
The elongation rate with respect to the natural length of the weather strip in the mounted state is set to be larger than the elongation rate with respect to the natural length of the weather strip in the mounted state of the weather strip portion mounted in the third sash in the stretched state, The elongation rate of the weatherstrip part to be mounted on the 1 sash in the stretched state with respect to the natural length of the weatherstrip in the mounted state is calculated as follows.
The tension of the weather strip mounted in the extended state on the second sash is set to be larger than the extension ratio of the weather strip in the mounted state to the natural length of the weather strip. The tension of the weather strip that is attached to the first sash in the extended state is made larger than the tension of the weather strip that is attached to the second sash in the extended state. It may be configured to.

That is, as shown in FIG. 5 to FIG. 7, when the extension ratios are set to be substantially the same in each weatherstrip portion, they are orthogonal to the lengthwise direction of the weatherstrips that are attached to each side in an extended state. The weather strip 3 to be attached to the second sash in a stretched state by changing the cross-sectional area in the direction
The cross-sectional area of b'is made larger than the cross-sectional area of the weather strip 3c 'attached to the third sash in the extended state, and the cross-sectional area of the weather strip 3a' attached to the first sash in the extended state is set to the second. If it is made larger than the cross-sectional area of the weather strip 3b 'that is attached to the sash in an extended state, even if each weather strip portion is extended at substantially the same extension rate when attached to each sash, as described above, Since the cross-sectional area and the tension are in a proportional relationship, the same effect as in the above embodiment can be obtained.

Next, Table 1 below shows the test results on an actual vehicle door.

As a result of performing a door opening / closing test for 30,000 times on the above-mentioned actual vehicle door, the deviation of the corner portion between the weather strip of the portion to be mounted on the first sash and the weather strip of the portion to be mounted on the second sash is I was not able to admit. That is, the tension difference between the two is at least about 0.3.
With Kgf, it is possible to reliably prevent the weather strip from shifting.

[Brief description of drawings]

1 is a perspective view of a rear side door according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 1, and FIG. 4 is related to the present invention. Perspective view of car, 5th
IV-IV sectional view of FIG. 4 showing another embodiment of FIGS.
6 is a sectional view taken along line VI-V and a sectional view taken along line VV. FIG. 1 ... Rear side door, 2 ... door body, 3 ... sash part,
3a ... 1st sash, 3b ... 2nd sash, 3c ... 3rd
Sash, 4 ... Hinge member, 5 ... Car body, 6 ... Weather strip, 7 ... Fastener, 8 ... Mounting groove, 3a '... 1st
Weather strips attached to sash, 3b '... Weather strips attached to second sash, 3c' ...
A weather strip to be attached to the 3rd sash.

Claims (3)

[Scope of utility model registration request] 1. A door body which is hinged to a vehicle body so as to be openable and closable, and a first sash having a lower portion connected to a hinge-side upper portion of the door body and extending upward from the connecting portion above the door body. A door sash including a second sash extending rearward from an upper end of the first sash to form an upper end portion and a third sash extending downward from a rear end of the second sash and connected to an upper portion of the door. A door of an automobile provided with a weather strip that is mounted on the outer peripheral edge portions of the door body, the first sash, the second sash, and the third sash, and that seals with the vehicle body.
The tension of the portion of the weatherstrip attached to the sash in the extended state is attached to the second sash of the portion of the weatherstrip attached to the second sash in the extended state. A vehicle door structure characterized by being set to be larger than the tension in the state. 2. A weathering rate of a portion of the weatherstrip attached to the first sash to a natural length of the weatherstrip in a state of being attached to the first sash. A utility model registration claim characterized in that it is set to be larger than an extension ratio with respect to a natural length of the weather strip in a state where the strip is attached to the second sash.
The vehicle door structure described in the item. 3. The cross-sectional area of the weather strip of the portion to be mounted on the first sash in a direction orthogonal to the length direction thereof is set to be larger than the cross-sectional area of the weather strip of the portion to be mounted on the second sash. The vehicle door structure according to claim 1, wherein the utility model registration is made.