JP2010012985A - Fixing structure of sound insulation material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide technology for reducing man-hours for process of a sound insulation material, and reducing man-hours for attachment work of the sound insulation material. <P>SOLUTION: The right and left edges of the sound insulation material 10 attached along a dashboard lower 20 are fixed by fixing around a hole 11 for fixing the left with a clip 21 and fixing around a hole 12 for fixing the right with a clip 21. The center, however, hangs down if only the right and left edges are fixed with the clips, therefore, a level difference part 13 formed at a lower part of the roughly center in a width direction of the sound insulation material 10 is deftly used to support the level difference part 13 with a vehicle body member, preventing the center from hanging down. Windows or notches are not required for the sound insulation material 10, therefore, man-hours of the process does not occur. Moreover, attachment work of the sound insulation material 10 is facilitated, thus reducing the man-hours of the attachment work. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technique for fixing a sound insulating material along a dashboard lower.

The dashboard lower is one member that partitions the vehicle compartment and the engine compartment. Such a dashboard lower is provided with a sound insulating material in order to prevent engine sound from entering the passenger compartment. Various fixing structures for the sound insulating material have been proposed (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 6-44242 (FIG. 2)

Patent document 1 is demonstrated based on the following figure.
FIG. 11 is a view for explaining the basic structure of the prior art. A bracket 102 formed by press-bending a metal plate is fixed to a dashboard lower 101 by welding. The bracket 102 includes flanges 103 and 103 that are brought into contact with the dashboard lower 101, wall portions 104 and 104 raised from the flanges 103 and 103, and a ceiling portion 105 that connects the ends of the wall portions 104 and 104 to each other. And presser flanges 106, 106 formed by cutting and raising in the middle of the wall portions 104, 104.

  On the other hand, a rectangular window 111 having a size corresponding to the ceiling portion 105 is opened in the sound insulating material 110, and cuts 112 are made at four corners of the rectangular window 111. A portion sandwiched between the pair of cuts 112 and 112 becomes flexible pieces 113 and 113 that are flexible.

  FIG. 12 is a diagram for explaining the procedure for attaching the sound insulating material described in FIG. 11. In FIG. 12A, the flexible pieces 113 and 113 indicated by solid lines are bent as indicated by arrows (1) and (1). Then, the flexible piece 113 indicated by an imaginary line is inserted between the flange 103 and the presser flange 106 as indicated by an arrow (2). Then, as shown in (b), the sound insulating material 110 can be fixed to the dashboard lower 101 via the bracket 102.

However, as shown in FIG. 11, since it is necessary to open the rectangular window 111 in the sound insulating material 110 and to make the cuts 112 at the four corners, the processing man-hours in the preparation stage before mounting increase.
In addition, depending on the shape of the dashboard lower, there are places where the bracket 102 cannot be attached, and the mounting location of the bracket 102 is restricted.
Even if the bracket 102 can be attached, as shown in FIG. 12A, it is necessary to bend the flexible piece 113 and insert it between the flanges 103 and 106, which is complicated. For this reason, the number of man-hours for mounting the sound insulating material increases.

  Therefore, a technique is required that can reduce the processing man-hours for the sound insulating material and reduce the man-hours for mounting the sound insulating material.

  This invention makes it a subject to provide the technique which can reduce the processing man-hour in a sound insulation material and can reduce the attachment man-hour of a sound insulation material.

The invention according to claim 1 is a sound insulating material fixing structure for fixing a sound insulating material along a dashboard lower to the dashboard lower,
The sound insulating material is a substantially rectangular body extending in the vehicle width direction, and has a left fixing hole on the left side of the substantially rectangular body, a right fixing hole on the right side, and the lower part in the center of the width direction. It has a stepped portion extending in the vehicle front and rear consisting of an upright portion raised in a direction away from the dashboard lower and a shelf extending in parallel to the dashboard lower from the upper end of the upright portion,
The left and right fixing holes are used to fix the dashboard lower, and the corner formed by the shelf and the upright part is applied to the vehicle body member to prevent the sound insulating material from shifting downward. It is characterized by.

  The invention according to claim 2 is the steering hanger bracket in which the vehicle body member is passed vertically between the center of the steering hanger beam extending in the vehicle width direction and the dashboard lower to support the steering column. It is characterized by that.

  The invention according to claim 3 is characterized in that the vehicle body member is an accessory fitting provided with a receiving surface attached to the steering hanger bracket to receive a corner of the sound insulating material.

  The invention according to claim 4 is characterized in that the accessory fitting also serves as a wire bracket that supports the foot parking wire.

  In the invention according to claim 5, the sound insulating material is a two-layer structure including a soft material that contacts the dashboard lower and a hard material that covers the soft material and faces the indoor side.

In the invention according to claim 1, the left and right sides of the rectangular sound insulating material are fixed to the dashboard lower using a clip or the like. Then, the center of the sound insulating material hangs down. Therefore, the lower center part of the sound insulating material is received by the vehicle body member. This can prevent the sound insulating material from drooping.
Since it is not necessary to provide windows or cuts in the sound insulation material, processing man-hours do not occur. Since only the sound insulating material is applied to the vehicle body member, the mounting operation of the sound insulating material becomes easy, and the number of mounting steps can be reduced.

  In the invention according to claim 2, the sound insulating material is received by the steering hanger bracket. The steering hanger bracket is one of the vehicle body components. That is, since the existing parts are also used, the procurement cost of the vehicle body member can be reduced or reduced.

  In the invention according to claim 3, the sound insulating material is received by the accessory fitting attached to the steering hanger bracket. The shape of the attached metal can be set freely. By protruding the attached metal from the steering hanger bracket, the position of the receiving surface of the attached metal can be arbitrarily set, and the sound insulating material can be supported at a more preferable position.

  In the invention according to claim 4, the attached metal fitting also serves as a wire bracket that supports the foot parking wire. The attached metal has two roles of supporting the sound insulating material and supporting the foot parking wire. As a result, the added value of the attached metal can be increased and the number of parts can be reduced.

  In the invention according to claim 5, the sound insulating material is a two-layer structure made of a soft material and a hard material. Note that the soft material has sound absorbing properties, and the hard material has sound insulating properties. The hard material is rich in rigidity, and if such a hard material is received by the vehicle body part, the sagging material can be more reliably prevented from sagging.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a front view of a sound insulating material according to the present invention, and the sound insulating material 10 is a horizontally long, substantially rectangular body having a left fixing hole 11 on the left side and a right fixing hole 12 on the right side, A step portion 13 is provided at the lower portion of the center in the width direction. The step 13 extends vertically in the vehicle front-rear direction.

  FIG. 2 is a cross-sectional view taken along line 2-2 of FIG. 1, and the sound insulating material 10 is a two-layer structure including a soft material 14 having a high sound absorbing property and a hard material 15 covering the indoor side surface of the soft material 14. It is. The hard material 15 is poor in sound absorption but rich in rigidity. That is, since the soft material 14 has a sound absorption property and the soft material 15 has a sound insulation property, the sound insulation material 10 having a two-layer structure exhibits two performances of sound absorption performance and sound insulation performance.

  And the step part 13 consists of the standing part 16 and the shelf part 17 extended in parallel to the general surface of the sound-insulating material 10 from the upper end of this standing part 16. The intersection of the shelf 17 and the upright part 16 becomes a corner 18, and the origin of the upright part 16, that is, the intersection of the general surface of the hard material 15 and the upright part 16 also becomes a corner 19. For convenience, the corner 18 may be referred to as the upper corner of the standing portion 16 and the corner 19 may be referred to as the lower corner of the standing portion 16.

  FIG. 3 is a view showing a form in which the sound insulating material is attached to the dashboard lower, and the sound insulating material 10 along the dashboard lower 20 is fixed around the left fixing hole 11 with a clip 21 and is used for right fixing. The left and right sides are fixed by fixing the periphery of the hole 12 with the clip 21. The clip 21 may be of any type as long as it is a well-known fixing tool such as a cap nut-shaped component that is fitted and fixed to the tip of the pin, a split pin-shaped component that is inserted into the groove of the grooved pin, and a hook clip.

Since the center hangs only by fixing the left and right pieces with clips, in the present invention, the step portion 13 formed at the lower portion of the substantially central portion in the width direction of the sound insulating material 10 is skillfully used, and the step portion 13 is supported by the vehicle body member. So I tried to prevent the drooping in the center.
That is, since it is not necessary to provide a window or a cut in the sound insulating material 10, the number of processing steps does not occur. In addition, the mounting work of the sound insulating material 10 becomes easy, and the number of mounting steps can be reduced.

  FIG. 4 is a perspective view of the front part of the passenger compartment. In the front part of the passenger compartment, the steering hanger beam 23 is passed in the vehicle width direction. The steering hanger beam 23 is a member that supports the steering column (FIG. 10, reference numeral 42), and is easily bent in the center (vehicle width center). Therefore, a structure in which the steering hanger beam 23 is reinforced by extending the steering hanger bracket 24 vertically and connecting it to the dashboard lower 20 is employed.

  Since the steering hanger bracket 24 is arranged at the center of the vehicle width, in the present invention, this member is used as a “body member”. The steering hanger bracket 24 is one of the vehicle body components. That is, since the existing parts are also used, the procurement cost of the vehicle body member can be reduced or reduced.

  FIG. 5 is a perspective view of the lower part of the steering hanger bracket. The columnar steering hanger bracket 24 is fixed to the dashboard lower 20 using an L-shaped bracket 25. The L-shaped bracket 25 includes a horizontal flange 26 and a vertical flange 27, and the vertical flange 27 extends in the longitudinal direction of the vehicle body. The accessory fitting 30 is welded and fixed to such a longitudinal flange 27 at a position indicated by an imaginary line. Note that the L-shaped metal fitting 25 can be formed integrally with the steering hanger bracket 24 and therefore included in the steering hanger bracket 24.

  FIG. 6 is a right side view of the lower portion of the steering hanger bracket. When viewed from the right side of the vehicle, the attachment fitting 30 is fixed in the middle of the longitudinal flange 27 in the height direction. The accessory 30 is a press-formed product, and includes a vertical piece 31 applied to the vertical flange 27, a horizontal piece 32 formed by bending from the vertical piece 31, and a bolt 33 fixed upward to the horizontal piece 32. And a receiving surface 34 formed by bending at the front part of the horizontal piece 32 (the part facing the front part of the vehicle body).

  FIG. 7 is an enlarged view of the main part of FIG. 3, wherein the longitudinal flange 27 of the L-shaped bracket 25 extends in the longitudinal direction of the vehicle body, and the accessory bracket 30 attached to the longitudinal flange 27 also extends in the longitudinal direction of the vehicle body. In addition, a receiving surface 34 formed at the front portion of the accessory metal fitting 30 extends in the vehicle width direction, and the receiving surface 34 contacts the step portion 13 of the sound insulating material 10.

FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 7, and the sound insulating material 10 that is in contact with the inclined surface 37 from the vertical surface 36 of the dashboard lower 20 is supported by the receiving surface 34. This prevents the sound insulating material 10 from dripping.
The sound insulating material 10 is a two-layer structure composed of a soft material 14 and a hard material 15, wherein the soft material has sound absorbing properties and the hard material has sound insulating properties. The hard material 15 disposed on the indoor side is directly supported by the receiving surface 34. Since the hard material 15 is rich in rigidity, the sound insulating material 10 does not have to worry about buckling and is securely fixed.

  9 is a cross-sectional view taken along line 9-9 in FIG. 7, and the upright portion 16 and a part of the shelf portion 17 constituting the step portion 13 are supported by the receiving surface 34. In particular, the shape of the corners 18 and 19 of the step portion 13 increases the rigidity and is supported by the receiving surface 34.

  FIG. 10 is a view of the front part of the vehicle compartment of the completed vehicle. The stepped portion 13 of the sound insulating material 10 is supported by the receiving surface 34 provided on the dashboard lower 20 side. The accessory fitting 30 having the receiving surface 34 also serves as a bracket that supports the foot parking wire 38. In other words, the foot parking wire 38 can be fixed by placing the clamp fitting 39 wound around the foot parking wire 38 on the horizontal piece 32 while aligning with the bolt 33 and tightening the nut 41 on the bolt 33.

  In addition, the joint cover 44 surrounding the universal joint 43 connected to the steering column 42 penetrates the sound insulating material 10. However, since the stepped portion 13 is supported by the receiving surface 34, there is a concern that the sound insulating material 10 may hang down and hit the joint cover 44. There is no. 45 is a brake pedal and 46 is an accelerator pedal.

  Note that the shape of the accessory 30 can be freely determined. For example, when the stepped portion 13 is on the right side of the position shown in the figure, an attached bracket having a shape protruding to the right may be employed. Further, when the stepped portion 13 is on the left side of the figure, it can be dealt with by attaching the attached metal 30 to the left side of the longitudinal flange 27 in the figure. Thus, if the attachment metal fitting 30 is employ | adopted, the suitable position of the sound-insulating material 10 can be supported, and the freedom degree of design increases.

  Further, the L-shaped bracket 25 constituting the lower part of the steering hanger bracket is used as a member for supporting the vehicle body part or the accessory bracket 30. However, when the steering hanger bracket and the step portion 13 are separated from each other, the body part is separately attached to the dashboard. It may be provided in the lower 20.

That is, in the first to fourth aspects, the sound insulating material is preferably a two-layer structure including a soft material and a hard material, but may be a single-layer structure including only a hard material.
Further, the vehicle body member in claim 1 is preferably a steering hanger bracket or an accessory fitting attached to the steering hanger bracket, but may be a member different from the steering hanger bracket.

  The present invention is suitable for a technique for fixing a sound insulating material along a dashboard lower of a passenger car.

It is a front view of the sound insulating material which concerns on this invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. It is a figure which shows the form with which the sound insulating material was attached to the dashboard lower. It is a perspective view of a vehicle compartment front part. It is a perspective view of the lower part of a steering hanger bracket. It is a right view of the lower part of a steering hanger bracket. It is a principal part enlarged view of FIG. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 7. FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 7. It is the figure which looked at the compartment front part of the completed vehicle. It is a figure explaining the basic structure of the prior art. It is a figure explaining the attachment procedure of the sound insulating material demonstrated in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Sound insulation material, 11 ... Left fixing hole, 12 ... Right fixing hole, 13 ... Step part, 14 ... Soft material, 15 ... Hard material, 16 ... Standing part, 17 ... Shelf part, 18, 19 ... Horn, DESCRIPTION OF SYMBOLS 20 ... Dashboard lower, 21 ... Clip, 24 ... Steering hanger bracket as a vehicle body member, 30 ... Accessory metal fitting as a vehicle body member, 34 ... Receiving surface provided in attached metal.

Claims (5)

A sound insulating material fixing structure for fixing the sound insulating material along the dashboard lower to the dashboard lower,
The sound insulating material is a substantially rectangular body extending in the vehicle width direction, and has a left fixing hole on the left side of the substantially rectangular body, a right fixing hole on the right side, and the lower part in the center of the width direction. It has a stepped portion extending in the vehicle front and rear consisting of an upright portion raised in a direction away from the dashboard lower and a shelf extending in parallel to the dashboard lower from the upper end of the upright portion,
The left and right fixing holes are used to fix the dashboard lower, and the corner formed by the shelf and the upright part is applied to the vehicle body member to prevent the sound insulating material from shifting downward. Sound insulation material fixing structure characterized by   The vehicle body member is a steering hanger bracket vertically extending between a center of a steering hanger beam extending in a vehicle width direction and a dashboard lower for supporting a steering column. 1. A sound insulating material fixing structure according to 1.   2. The sound insulating material fixing structure according to claim 1, wherein the vehicle body member is an attachment fitting attached to a steering hanger bracket and having a receiving surface for receiving a corner of the sound insulating material.   4. The sound insulating material fixing structure according to claim 3, wherein the attachment metal fitting also serves as a wire bracket that supports the foot parking wire.   The sound insulation material is a two-layer structure including a soft material that contacts the dashboard lower and a hard material that covers the soft material and faces the indoor side. Sound insulation material fixing structure as described in the item.

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