JP2005193821A - Reinforcing member mounting structure on instrument panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcing member mounting structure on an instrument panel capable of obtaining a design surface of the instrument panel having less remarkable recess and excellent appearance design property. <P>SOLUTION: In the reinforcing member mounting structure, a reinforcing member 2 having a flange part 21 is fixed to an instrument panel 1 of a vehicle. The instrument panel 1 has a projecting rib part 3 and a boss part 4 for screw setting on a back side surface 12 thereof. The flange part 21 of the reinforcing member 2 has a screw hole to pass a screw to be screwed to the boss part 4 and a rib hole to pass the rib part 3. The reinforcing member 2 is fixed to the instrument panel 1 by the rib engagement to pass the rib part 3 through the rib hole and the screw setting to screw the screw passed through the screw hole to the boss part 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a reinforcing member mounting structure to an instrument panel, in which a reinforcing member having a flange portion is fixed to an instrument panel of a vehicle.

Conventionally, as shown in FIGS. 8 and 9, as a structure for fixing a member to the back surface of an instrument panel 91 of a vehicle, for example, there is a duct mounting structure in which an air conditioning duct 92 having a flange portion 921 is fixed (patent) Reference 1).
The duct mounting structure to the conventional instrument panel is formed by fixing the air conditioning duct 92 to the instrument panel 91 by screwing at the flange portion 921.
Therefore, a large number of boss portions 94 for screwing the screws 95 are formed on the rear side surface 912 of the instrument panel 91 so as to project.

  However, as shown in FIG. 9, when a large number of the boss portions 94 are formed so as to protrude from the back side surface 912 of the instrument panel 91, there is a problem that a large number of sink marks 96 are generated on the design surface 911. . The sink 96 is a factor that impairs the appearance of the instrument panel 91 depending on the generation amount and generation position.

  To solve this problem, as shown in FIG. 10, means for forming a meat stealing portion 913 that partially reduces the thickness of the instrument panel 91 around the root of the boss portion 94 on the back side surface 912 of the instrument panel 91. Can be considered. Thereby, the occurrence of sink marks 96 on the design surface 911 at the position where the boss portion 94 is disposed can be suppressed to some extent.

  However, in order to prevent the occurrence of sink 96 and maintain the appearance of the design surface 911 of the instrument panel 91, it is necessary to finely adjust the size and shape of the meat stealing portion 913. Therefore, it is necessary to tune the molding die, which increases the manufacturing cost. In particular, if the number of the boss portions 94 is large, tuning becomes difficult and the manufacturing cost increases accordingly.

Also, when the instrument panel 91 is mass-produced after tuning, the sink 96 may recur due to changes in various other conditions.
Such a problem is not limited to the air conditioning duct, and may occur when various members such as a reinforcing member are attached to the instrument panel.

Japanese Utility Model Publication No. 06-042134

  The present invention has been made in view of such conventional problems, and provides a reinforcing member mounting structure to an instrument panel that can provide a design surface of an instrument panel that is not prominent and has excellent appearance design. It is something to try.

The present invention is a reinforcing member mounting structure in which a reinforcing member having a flange portion is fixed to an instrument panel of a vehicle.
The instrument panel has a rib portion and a boss portion for screwing formed to protrude on the back side surface thereof,
The flange portion of the reinforcing member has a screw hole through which a screw fastened to the boss portion is inserted, and a rib hole through which the rib portion is inserted,
The reinforcing member is fixed to the instrument panel by rib engagement by passing the rib portion through the rib hole and screw fastening by screwing the screw passed through the screw hole into the boss portion. It is in the reinforcement member attachment structure to the instrument panel characterized by the above-mentioned (Claim 1).

Next, the effects of the present invention will be described.
In the reinforcing member mounting structure, the reinforcing member is fixed to the instrument panel by both the rib engagement and the screw fastening, and a boss portion and a rib portion are formed to protrude from the instrument panel. It is.

  The boss portion needs to have a relatively large cross-sectional area in order to screw the screw, but the rib portion does not need to screw the screw, so that the cross-sectional area can be made relatively small. Therefore, about the said rib part, generation | occurrence | production of the sink on the design surface of an instrument panel can be suppressed by making a cross-sectional area small.

  As described above, in the reinforcing member mounting structure, since both the rib engagement and the screw fastening are used, the number of boss portions formed on the instrument panel can be reduced. That is, it is possible to reduce the number of boss portions that are likely to cause sink marks.

For example, the design surface of the instrument panel where the sink marks are not conspicuous can be obtained by selecting the rear side surface of the relatively inconspicuous portion of the instrument panel and arranging the boss portion.
Further, for example, sinking can be suppressed by forming a meat stealing portion that partially reduces the thickness of the instrument panel around the base of the boss portion. In this case, since the number of the boss portions is small, tuning for forming the meat stealing portion is relatively easy.

  In addition, since the rib engagement and screw fastening are used together, for example, by attaching the above screws to the portion of the reinforcing member that requires a particularly large fixing force, the reinforcing member is attached to a high-strength instrument panel. A structure can be obtained.

  As described above, according to the present invention, it is possible to provide a reinforcing member mounting structure on an instrument panel that can obtain a design surface of an instrument panel that is not conspicuous and has excellent appearance design.

In the present invention (Claim 1), it is preferable that the rib portion is disposed on a back surface of a portion having a relatively high rigidity or a conspicuous portion in the instrument panel. On the other hand, it is preferable that the boss portion is disposed on the back side surface of a portion having relatively low rigidity or a portion that is hardly noticeable in the instrument panel.
Thereby, while obtaining the design surface of the instrument panel excellent in the external appearance design property, the reinforcement member attachment structure to an instrument panel with high intensity | strength can be provided.

Moreover, it is preferable that the number of the boss portions to be arranged is the minimum necessary for ensuring the strength of the reinforcing member mounting structure.
The reinforcing member is a member for reinforcing the instrument panel. Moreover, this reinforcement member shall comprise a part of air conditioning duct, for example.

Moreover, it is preferable that the said rib part and the boss | hub part incline with respect to the said instrument panel (Claim 2).
In this case, the rib engagement can increase the strength against a load in a direction perpendicular to the instrument panel.

  Moreover, it is preferable that the rib part and the boss part are all formed in parallel with each other. In this case, the demolding operation at the time of molding becomes easy, and the instrument panel can be molded relatively easily. Moreover, the attachment operation | work of the reinforcement member to the said instrument panel can be performed comparatively easily.

  Moreover, it is preferable that the angle with respect to the said instrument panel of the said rib part and a boss | hub part shall be 7-45 degrees. In this case, it is possible to sufficiently ensure the strength against the load in the direction perpendicular to the instrument panel while sufficiently suppressing the occurrence of sink marks. When the said angle is less than 7 degrees, the connection surface of the said rib part or boss | hub part and the said instrument panel may become large, and there exists a possibility that suppression of sinking may become difficult. On the other hand, when the angle exceeds 45 °, it is difficult to obtain sufficient rib engagement strength, and it may be difficult to ensure sufficient strength against the load.

The rib portion preferably has a substantially cross-shaped cross section.
In this case, a high-strength rib portion can be formed while reducing the cross-sectional area.
Moreover, as a cross-sectional shape of the said rib part, it can also be set as a substantially T shape, a substantially I shape, etc., for example.

(Example 1)
A reinforcing member mounting structure to an instrument panel according to an embodiment of the present invention will be described with reference to FIGS.
The said reinforcement member attachment structure fixes the reinforcement member 2 which has the flange part 21 to the instrument panel 1 of a vehicle as shown in FIGS. 1-3.

The instrument panel 1 includes a rib portion 3 and a boss portion 4 for screwing, which are formed to protrude from the back side surface 12 of the instrument panel 1.
The flange portion 21 of the reinforcing member 2 has a screw hole 22 through which the screw 5 fastened to the boss portion 4 is inserted, and a rib hole 23 through which the rib portion 3 is inserted.
Then, rib engagement by passing the rib portion 3 through the rib hole 23 (FIG. 2), and screw fastening by screwing the screw 5 passed through the screw hole 22 into the boss portion 4 (FIG. 3). ) To fix the reinforcing member 2 to the instrument panel 1.

The reinforcing member 2 reinforces the instrument panel 1 by being fixed to the instrument panel 1.
The reinforcing member 2 constitutes a part of the air conditioning duct.
As shown in FIGS. 2 and 3, the rib portion 3 and the boss portion 4 are inclined with respect to the instrument panel 1.
The angle with respect to the said instrument panel 1 of the said rib part 3 and the boss | hub part 4 is 7-45 degrees.
Further, the rib portion 3 and the boss portion 4 are all formed in parallel with each other.

As shown in FIG. 5, the rib portion 3 has a substantially cross-shaped cross section, and as shown in FIG. 6, the rib hole 23 has a round hole shape that approximates a circumscribed circle of the cross-sectional shape of the rib portion 3. Have. And the said rib part 3 penetrates the said rib hole 23, and comprises the said rib engagement.
Further, as shown in FIG. 4, the rib portion 3 is provided with a chamfered portion 311 at a corner portion at the tip portion 31 to facilitate insertion of the rib portion 3 into the rib hole 23.

  As shown in FIG. 1, the rib portion 3 is disposed on the back side of a relatively high rigidity portion or a conspicuous portion of the instrument panel 1. On the other hand, the boss 4 is disposed on the back side of the instrument panel 1 where the rigidity is relatively low or where it is difficult to stand out.

  That is, as shown in FIG. 1, the boss 4 is basically formed in the vicinity of the periphery of the instrument panel 1 and in the vicinity of the corner of the reinforcing member. In the vicinity of the center portion of the instrument panel 1, the rib portion 3 is mainly formed.

  Further, as shown in FIG. 3, a meat stealing portion 13 for partially reducing the thickness of the instrument panel 1 is formed around the base of the boss portion 4. About the depth of this meat stealing part 13, in order to prevent generation | occurrence | production of sink effectively, the optimal depth is set by performing die tuning.

  The boss 4 has a cylindrical shape with an outer diameter of about 8 mm and an inner diameter of about 4.1 mm. The rib portion 3 has a substantially cross-shaped cross section in which plate-like bodies having a thickness of about 1.2 mm and a width of about 8 mm are orthogonal to each other. The instrument panel 1 has a thickness of about 3.5 mm. Further, the flange portion 21 of the reinforcing member 2 is configured by overlapping two plate-like bodies having a thickness of about 0.8 mm.

Next, the function and effect of this example will be described.
In the reinforcing member mounting structure, the reinforcing member 2 is fixed to the instrument panel 1 by both the rib engagement (FIG. 2) and the screw fastening (FIG. 3). Has a boss 4 and a rib 3 protruding.

  The boss portion 4 needs to have a somewhat large cross-sectional area in order to screw the screw 5, but the rib portion 3 does not need to screw the screw 5, so the cross-sectional area is relatively small. be able to. Therefore, about the said rib part 3, generation | occurrence | production of the sink in the design surface 11 of the instrument panel 1 can be suppressed by making a cross-sectional area small.

  As described above, in the reinforcing member mounting structure, since both the rib engagement and the screw fastening are used, the number of the boss portions 4 formed on the instrument panel 1 can be reduced. That is, it is possible to reduce the number of boss portions 4 that are likely to cause sink marks.

And as shown in FIG. 1, the design surface 11 of the instrument panel 1 which is not conspicuous by selecting the back side surface 12 of the comparatively inconspicuous part in the said instrument panel 1, and arrange | positioning the said boss | hub part 4. As shown in FIG. Can be obtained.
Further, as shown in FIG. 3, sinking can be suppressed by forming the meat stealing portion 13 around the base of the boss portion 4. In this case, since the number of the boss portions 4 is small, tuning for forming the meat stealing portion 13 is relatively easy.

  Further, since the rib engagement and the screw fastening are used together, the above-mentioned screw fastening is performed on a portion requiring a large fixing force, such as the vicinity of the peripheral portion of the reinforcing member 2, thereby providing a high strength instrument panel. A reinforcing member mounting structure can be obtained.

Moreover, since the said rib part 3 and the boss | hub part 4 incline with respect to the said instrument panel 1, the intensity | strength with respect to the load of the direction perpendicular | vertical to the instrument panel 1 can be made high by the said rib engagement. .
Further, since the rib portion 3 and the boss portion 4 are all formed in parallel with each other, it is easy to remove the mold at the time of molding, and the instrument panel 1 can be molded relatively easily. Moreover, the attachment operation | work of the reinforcement member 2 to the said instrument panel 1 can be performed comparatively easily.

Moreover, since the angle with respect to the said instrument panel 1 of the said rib part 3 and the boss | hub part 4 is 7-45 degrees, intensity | strength with respect to the load of the direction perpendicular | vertical to the instrument panel 1 is fully suppressed, generating | generating a sink. Can be secured sufficiently.
Further, as shown in FIG. 5, since the rib portion 3 has a substantially cross-shaped cross section, the rib portion 3 having high strength can be formed while reducing the cross-sectional area.

  As described above, according to this example, it is possible to provide a reinforcing member mounting structure on an instrument panel that can provide a design surface of an instrument panel that is not conspicuous and has excellent appearance design.

The perspective view of the reinforcement member attachment structure to the instrument panel in an Example. Sectional drawing of the reinforcement member attachment structure to the instrument panel of a rib part periphery in an Example. Sectional drawing of the reinforcement member attachment structure to the instrument panel around a boss | hub part in an Example. The perspective view of the rib part in an Example. The cross-sectional perspective view of the rib part in an Example. The perspective view of the rib hole in an Example. Explanatory drawing of the rib engagement seen from the front-end | tip part side of the rib part in an Example. The perspective view of the instrument panel in which the boss | hub part was formed in a prior art example. Sectional drawing of the duct attachment structure to the instrument panel around a boss | hub part in a prior art example. Sectional drawing of the instrument panel around the boss | hub part which provided the meat stealing part in a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Instrument panel 11 Design surface 12 Back side surface 2 Reinforcement member 21 Flange part 22 Screw hole 23 Rib hole 3 Rib part 4 Boss part 5 Screw

Claims (3)

In the reinforcing member mounting structure in which the reinforcing member having the flange portion is fixed to the instrument panel of the vehicle,
The instrument panel has a rib portion and a boss portion for screwing formed to protrude on the back side surface thereof,
The flange portion of the reinforcing member has a screw hole through which a screw fastened to the boss portion is inserted, and a rib hole through which the rib portion is inserted,
The reinforcing member is fixed to the instrument panel by rib engagement by passing the rib portion through the rib hole and screw fastening by screwing the screw passed through the screw hole into the boss portion. A structure for attaching a reinforcing member to an instrument panel.   2. The reinforcing member mounting structure for an instrument panel according to claim 1, wherein the rib portion and the boss portion are inclined with respect to the instrument panel.   3. The reinforcing member mounting structure for an instrument panel according to claim 1, wherein the rib portion has a substantially cross-shaped cross section.

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