JPS635602B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method for accurately and reliably fixing a sanderch panel when the body floor of an automobile or the like is constructed of the sanderch panel. .

(Prior art) Engine vibrations and noise from the exhaust system mainly act on the floor of the vehicle from below, and these vibrations are transmitted into the passenger compartment, or low-frequency noise enters the passenger compartment as so-called muffled noise. , tend to cause discomfort to the driver and passengers.

Therefore, vibration damping performance and sound insulation performance of the vehicle body floor are required, and such demands have become particularly important in recent years.

In order to meet the above requirements, methods have recently begun to be adopted in which the vehicle body floor is constructed in the form of a so-called sandwich panel.

As shown in Fig. 1, the Sanderch panel is a conventional floor lower panel 1 in which so-called Melsheet 2, which is mainly made of a resin material such as thermoplastic rubber with a large specific gravity, is placed on top of which a steel plate is further placed. By placing the floor upper panel 3 manufactured by Manufacturer Co., Ltd., and heating and fusing the Mel sheet 2,
The Melsheet 2 is integrated with a floor lower panel 1 and a floor upper panel 3.

The sand beach panel S can dramatically improve vibration damping performance and sound insulation performance in cooperation with the felt 4 and carpet 5 having high sound absorption performance disposed thereon.

However, during heat curing work, the Melsheet 2 first expands by a predetermined amount due to heating, and then shrinks due to fusion. In addition, there were cases in which gaps were formed, especially near the edges, and the above-mentioned sanderch panel S could not exhibit its intended performance.

In order to solve this problem, conventionally, as shown in Fig. 2, the end Sa of the sandwich panel S was fixed with screws 6.
However, it is difficult to securely fasten the floor lower panel 1, Mel sheet 2, and floor upper panel 3 that make up the Sanderch panel S with this method alone. There is a large possibility that gaps etc. will occur when the Melsheet 2 contracts. Moreover, since the holes are made outwardly in the floor panel 1, this is disadvantageous in terms of waterproofing and rustproofing, and additional waterproofing and rustproofing processes are required.

(Purpose of the Invention) The present invention was created in view of such conventional problems, and an object of the present invention is to provide a method for accurately fixing sanderch panels without causing problems in terms of waterproofing and rust prevention. shall be.

(Structure of the Invention) In order to achieve the above object, the present invention provides a sandwich panel consisting of a floor lower panel, a Mel sheet on the panel, and a floor upper panel on the Mel sheet, and an end portion of the floor upper panel. It consists of a substantially L-shaped retainer attached to the vehicle body so as to be able to be pressed and fixed, and the Mel sheet is laid on the floor upper panel,
The above floor upper panel is placed on the Mel sheet, one side of the retainer is brought into contact with the floor upper panel, the other side of the retainer is fixed to the side of the vehicle body at this position, and then the Mel sheet is heat fused. It is characterized by being made to do.

(Effects of the Invention) In the present invention having the above configuration, one side of the substantially L-shaped retainer is brought into contact with the floor upper panel of the sandwich panel, and at this position, the other side of the retainer is brought into contact with the side part of the vehicle body. I decided to fix it, so
Even if Melsheet expands or contracts, the sanderch panel is returned to its original position by the elastic force of the retainer, and as a result, the edge of the sanderch panel is constantly under downward pressure due to the elastic force of the retainer, causing Melsheet to Can be reliably fused.
Furthermore, it is possible to cope with changes in the gap between the upper panel and the floor panel due to the melt sheet fitting in during the heating process.

Therefore, even if the Melsheet expands or contracts at the time of heat-sealing the Melsheet, since it is always pressurized with a predetermined pressure from the above retainer, it can be sufficiently followed, and when the Melsheet hardens, it can be used as a sandwich panel. The integrity of the structure is firmly ensured, and the desired vibration damping and sound insulation performance can be achieved.

Furthermore, since there is no need to drill holes in the floor panel, there are no problems with waterproofing or rust prevention as in the conventional method.

Further, by forming the above-mentioned protrusions on the floor upper panel, various useful effects can be achieved, such as further improving the rigidity of the end portion of the sandwich panel.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Note that the same elements as those in the above conventional example are indicated by the same reference numerals.

FIG. 3 is an embodiment showing the configuration of the end portion of the sandwich panel after being fixed by the fixing method according to the present invention, and S in the figure indicates the floor lower panel 1,
Sanderch panel consisting of Mel sheet 2 and floor upper panel 3, 4 is felt, 5 is carpet, 7 is retainer, 8 is sill member, 9, 10
are an inner sill and an outer sill that constitute the sill 8.

The retainer 7 is made of a steel plate and has a substantially L-shaped cross section, and its horizontal side 7a is formed continuously at the end of the floor upper panel 3 in the longitudinal direction (direction perpendicular to the plane of the paper in the figure). It abuts under pressure against an upwardly protruding portion 31 serving as a reinforcing means, as will be described later, and the upright side 7b is fixed to the inner sill 9 with screws 11.

Next, a fixing method according to this embodiment will be explained.

First, as shown in Fig. 4, the floor lower panel 1
A Mel sheet 2 is laid on top, and a floor upper panel 3 made of a steel plate is placed on top of it for positioning.

After that, the horizontal side 7a of the retainer 7 is brought into contact with the floor upper panel 3 as shown in FIG. It will stick.

Due to the expansion of the Mel sheet, the floor upper panel 3 displaces the horizontal side 7a of the retainer 7 upward with a predetermined urging force R, and a corresponding reaction force R' is constantly applied to the floor upper panel 3 from the retainer 7 side. I will be joining.

Note that the reaction force R' from the retainer 7 is input from the protrusion 31 of the floor upper panel 3, and since the protrusion 31 is provided continuously in the longitudinal direction, the retainer 7 is Even if the projections 31 are provided intermittently at predetermined intervals,
As a result, the rigidity of the floor upper panel 3 is increased, and a uniform reaction force is applied in the longitudinal direction.

Therefore, in this state, if the Melsheet 2 of the sandwich panel S is heated and fused using a predetermined heating means, the Melsheet 2 will be attached to the lower floor lower panel 1.
It is firmly integrated with the upper floor panel 3 and the upper floor panel 3 without creating a gap or the like, making it possible to exhibit predetermined vibration damping performance and sound insulation performance.

Note that if the horizontal side 7a of the retainer 7 is formed into a tapered shape having an angle of 90 degrees or more with respect to the upright side 7b, when fastening the screw 11 and the upright side 7b to the inner sill 9, the floor upper panel The projection 31 of No. 3 can be pressed down even more strongly by the effect of the tapered shape.

In addition, in the above embodiment, the floor upper panel 3
Although an example is shown in which a bead-shaped protrusion 31 is provided as a reinforcing means, other suitable means such as erecting a flange at the end may be adopted as a reinforcing means to increase the rigidity. Moreover, the reinforcing means is not limited to being provided continuously in the longitudinal direction, but may be formed intermittently, or may be omitted depending on the conditions.

In addition to the example in which the retainer 7 is disposed intermittently at predetermined intervals, various modifications may be made without departing from the gist of the present invention, such as the retainer 7 may be disposed continuously in the longitudinal direction if necessary. , change is possible.

Moreover, even if the retainer 7 is removed after heat-sealing the Melsheet, each panel and the Melsheet are integrated, so the desired performance can be obtained.

Therefore, the retainer 7 can be removed if necessary.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main part showing the structure of the sanderch panel on the car body floor, Fig. 2 is a sectional view of the main part showing the conventional method of fixing the sanderch panel, and Figs. An embodiment is shown, and FIG. 3 is a sectional view of a main part showing the configuration of the end portion of the sanderch panel after the fixing work is completed, and FIGS. 4 to 6 are explanatory diagrams showing the procedure for fixing the sanderch panel. S...Sand Germany panel, 1...Floor lower panel, 2...Mel seat, 3...Floor upper panel, 31...Reinforcement means (projection), 4...
felt, 5... carpet, 8... sill member,
9... Inner sill, 11... Screw.

Claims (1)

[Claims] 1. A sandwich panel consisting of a floor lower panel, a Mel sheet on the panel, and a floor upper panel on the Mel sheet, and an approximately L panel attached to the vehicle body so as to be able to press and fix the ends of the floor upper panel. The Mel sheet is laid down on the floor lower panel, the floor upper panel is placed on the Mel sheet, and one side of the retainer is brought into contact with the floor upper panel. A method for fixing a sanderch panel on a car body floor, characterized in that the other side of the retainer is fixed to the side of the car body at a certain position, and then the Melsheet is heat-sealed.