JPH0745390Y2 - Vehicle damping material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a damping material for vehicles.

(Prior Art) It is common to mount a damping material on a vehicle body panel in order to reduce vibration and noise. For example, the actual exploitation Sho 63-17125
Japanese Unexamined Patent Publication (Kokai) No. 6 discloses a technique for mounting an interior material composed of a laminate of a sound absorbing material layer made of urethane foam, an asphalt-urethane integrated foam layer, and a surface sound insulation layer on a vehicle body panel.

Also, when mounting the damping material on the vehicle body panel, it is possible to simply place the damping material on the vehicle body panel or temporarily fix it, and use the fact that the damping material is heated in the drying process after painting the vehicle body. A technique of heat-sealing this damping material to a vehicle body panel is also generally known.

(Problems to be solved by the invention) By the way, when the damping material is mounted on the vehicle body panel by the above-mentioned heat fusion, as shown in FIG. If there is an air pocket c between a and the vibration damping material b, the vibration damping material b may partially hang down or break. That is, when the air expands due to heat, a partial bulge portion d is formed on the damping material b softened by heat as shown in FIG. 6, and the bulge portion d is caused by its own weight. It becomes a hanging portion e as shown in FIG. 7, and is torn off.

That is, an object of the present invention is to provide a damping material that can be mounted on the vertical surface of a vehicle body panel without causing the above-mentioned sagging and breaking.

(Means for Solving the Problems) In order to solve the above problems, the present invention reliably cuts air by making diagonal cuts in the parts of the damping material to be mounted on the vertical surface of the vehicle body panel. It enables you to.

That is, the specific means is a damping material that is mounted on the vehicle body panel by heat fusion, and a large number of parts that are inclined with respect to the horizontal are mounted on the portion that is mounted on the vertical surface that spreads up and down on the vehicle body panel. A damping material for a vehicle, characterized in that a cut is formed.

(Operation) In the above damping material, when heated for heat fusion to the vehicle body panel, the air between the damping material and the vertical surface of the vehicle body panel is located at the break. To get out directly from this break. Also, even if there is an air pocket at a place where there is no break, since the cut is inclined, the air pool expands and reaches a near break and escapes from there, and a large bulge part is placed on the damping material. It never forms.

That is, the fact that the above-mentioned cut is inclined with respect to the horizontal is
For the following reasons.

In the case of a horizontal cut, the lower edge portion of the cut softens and slips down during heat fusion, or is easily flipped downward. On the other hand, in the case of a break in the vertical direction, there is no such problem, but if a position shift occurs between the break and the air reservoir, the air cannot be released. In other words, air pockets are likely to occur in specific places where there are irregularities on the vehicle body panel, but installing the damping material on the body panel so that the cuts match the positions where air pockets occur will complicate the work. difficult. In the case of a break in the vertical direction, if the positional deviation occurs, the break does not reach the break even if the air reservoir expands downward due to the softening of the damping material on the vertical surface, and therefore does not contribute to air bleeding.

On the other hand, in the case of the break of the damping material according to the present invention,
Since it is inclined, there is a width on the left and right, and even if there is a positional deviation between the air reservoir and the air reservoir, the air reservoir expands downward and reaches a break, and since it is inclined,
It is also difficult for the bottom edge of the cut to slip or turn over. In addition, ribs (protrusions or grooves) are formed on the vertical surface of the vehicle body panel in the up-down direction and the left-right direction in order to increase its strength, and this riff easily causes the air pool. In the case of an inclined cut, it is easy to cross the ribs in the vertical and horizontal directions, which is effective for the generation of air pockets due to such ribs.

(Effects of the Invention) Therefore, according to the vibration damping material of the present invention, since a large number of cuts inclined to the horizontal are formed in the portion to be mounted on the vertical surface of the vehicle body panel, the bottom edge of the cut is turned off or turned up. It is possible to reliably perform air bleeding while preventing the above, and it is possible to heat-bond the damping material to the vertical surface without causing the damping material to partially hang down or tear.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In the vehicle (automobile) 1 shown in FIG. 1, 2 is a floor panel (iron plate) of the vehicle body, and 3 is a raised tunnel portion extending in the front-rear direction at the center of the floor panel 2. In this embodiment, as shown in FIG. 2, an asphalt-type damping material for tunnels 5 is installed from the tunnel portion 3 to the floor portions 4 and 4 on both sides thereof, and the floor portions 4 and 4 are also made of the asphalt-based damping material. The floor damping material 6, 6 is installed.

The tunnel damping material 5 is mounted on the top surface mounting portion 5a to be mounted on the top surface portion 3a of the tunnel portion 3, and on the vertical surfaces 3b and 3b extending vertically from both ends of the top surface 3a to the floor portions 4 and 4 on both sides. The vertical mounting portions 5b, 5b and the floor mounting portions 5c, 5c at both ends mounted on the floor portions 4, 4 are integrally connected. Further, the floor damping material 6 is mounted such that its end portion is superposed on the floor mounting portions 5c, 5c of the tunnel damping material 5.

As shown in FIG. 3, a large number of cuts (slits) 7 are formed in the vertical surface mounting portion 5b of the tunnel damping material 5 at predetermined intervals. That is, as shown in FIG. 4, the cut 7 is formed in a V shape by connecting the lower ends of two cuts 7a, 7a inclined with respect to the horizontal. The angle α of “V” at the break 7 is preferably in the range of 60 to 90 degrees.

When mounting the damping material 5 and 6 on the floor panel 2, first, mount the damping material 5 for the tunnel on the tunnel portion 3,
Next, the floor damping material 6 is placed on the floor portion 4. Then, in this state, the vibration damping materials 5 and 6 are heated by putting the vehicle body in a drying oven or the like for painting.

As a result, the damping materials 5 and 6 are softened and the tunnel portion 3
And it will be heat-sealed to the floor portion 4. In the process of heat fusion, the vertical surface mounting portion 5b of the tunnel damping material 5 is
If there is air between the vertical surface 3b of the tunnel portion 3 and the air, the air expands under the influence of the heating, but the air located at the cut 7 directly escapes from the cut 7. Further, even if an air pool is formed at a place where there is no break 7, the air pool expands and reaches a nearby break 7 and escapes from there. That is, since the cut 7 is V-shaped and has a width on the left and right, even if a positional deviation occurs with the air reservoir, the air reservoir expands downward and reaches the cut 7, and Goes smoothly through this break 7. And
Since the lower edge of the cut 7 is inclined, it does not slip down due to softening and does not turn downward, and in the end, the tunnel damping material 5 adheres to the tunnel portion 3 without sagging or breaking. Will be done.

In addition, in the case of the break 7, there is a width in the vertical and horizontal directions,
Air removal over the entire vertical surface 3b can be performed with a relatively small number.

Therefore, it is preferable to set the angle α of “V” at the break 7 to be in the range of 60 to 90 degrees.
This is because the width of the gap is narrow and there is not much difference from the break in the up and down direction, and when the angle exceeds 90 degrees, the lower edge of the break 7 is likely to slip or turn over.

Further, in the case of the above-mentioned embodiment, since the floor damping portions 5c and 5c are provided on the tunnel damping material 5 and the floor damping portions 6 are laid on the floor mounting portions 4 and 4, the floor damping material 6 is placed thereon. It becomes easier for the damping material 5 for the tunnel to follow the vertical surface 3b of the tunnel part 3,
Combined with the cut 7, the adhesion of the damping material 5 for the cono tunnel to the tunnel portion 3 is improved.

Although the break 7 is V-shaped in the above embodiment, it may be inclined in a straight line with respect to the horizontal.

Further, it is needless to say that the present invention can be applied not only to the tunnel portion 3 but also to other vehicle body panels having a vertical surface such as a dash panel 8 for partitioning the engine room and the vehicle compartment.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention, FIG. 1 is a perspective view showing a vehicle with a part cut away, FIG. 2 is a sectional view of a vehicle body panel equipped with a damping material, and FIG. Is a perspective view showing a part of the vibration damping material, FIG. 4 is a front view of a cut, and FIG. 5 is a cross-sectional view showing the longitudinal surface of the vehicle body panel and the vibration damping material in a state where air is trapped. FIG. 7 is a view similar to FIG. 5 showing a state in which the vibration damping material swells, and FIG. 7 is a view similar to FIG. 5 showing a state in which the vibration damping material hangs down. 1 …… Vehicle 2 …… Floor panel 3 …… Tunnel part 3b …… Vertical surface 5 …… Tuning damping material 5b …… Vertical surface mounting part 7 …… Discontinuity

Claims (1)

[Scope of utility model registration request] 1. A vibration damping material mounted on a vehicle body panel by heat fusion, wherein a large number of cuts inclined with respect to the horizontal are formed in a portion mounted on a vertical surface extending vertically of the vehicle body panel. Damping material for vehicles characterized by