JPS62203813A - Lighting window for vehicle - Google Patents

Abstract

PURPOSE:To keep off the influence of thermal deformation, by setting up a weather strip in a peripheral edge of an organic glass plate via a thermal deformation absorbing device, and constituting the organic glass plate to be shiftable to the frame, in case of a lighting window for a roof or the like. CONSTITUTION:When an organic glass plate 4 is subjected to thermal expansion by the sunlight, a space between a peripheral edge of the glass plate 4 and a frame 3 is not stuck to each other so that the cause movements relatively, absorbing the deformation of the organic glass plate 4, and the central part of the glass plate 4 is prevented from bulging. And, since a space S is formed between a weather strip 2 and the organic glass plate 4, thermal expansion of the glass plate 4 is absorbed, thus the glass plate 4 is prevented from being deformed. At this time, a sealant 7 keeps its sealability owing to stickiness and it is followable to movements of the glass plate 4. With this constitution, the thermals expansion of the glass plate is absorbed and, what is more, lighting capacity and appearance both are preventable from lowering.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a lighting window for a vehicle that is attached to the roof of a vehicle.

(Prior Art) As shown in FIG.
Some of them have a lighting window 52 attached to their roof 51.

As shown in FIGS. 6 and 7, the lighting window 52 uses an inorganic glass plate 57 with a gently curved surface that is convex upward, and this inorganic glass 57 has a frame-like frame. It is fixed to the upper surface of 53 via adhesive 54.

However, in recent years, as automobiles have become more lightweight, the lighting window 52 has also been reduced in weight. and,
An inorganic glass plate 57 is used as a means to reduce the weight of the lighting window 52.
One possibility is to change the material to an organic glass plate.

(Problem to be solved by the invention) However, when a daylight window using an organic glass plate is installed in a car, the organic glass plate receives direct sunlight and thermally expands, causing the central part of the organic glass plate to expand. There is a problem that it protrudes upward and becomes deformed.

Furthermore, when an organic glass plate is exposed to low temperatures, it contracts and its curved surface becomes flat.

The deformed organic glass plate makes the roof 51 of the automobile 50 look bad, and further degrades the quality of the automobile 50.

The reason why the organic glass plate protrudes or becomes flat is that the organic glass plate is fixed to the frame 53 and the adhesive 54 at the lower peripheral edge of the organic glass plate, and the coefficient of thermal expansion or contraction of the organic glass plate is higher than that of the inorganic glass plate 57. (For example, when an organic glass plate made of polymethyl methacrylate with a width of aoomm is heated from room temperature to 90'C, it will elongate by about 3 mm.On the contrary, when the width of the organic glass plate is increased from room temperature to Even at a low temperature of -30'C, it contracts by the same amount of change in length as above).

Therefore, the present inventors used an organic glass plate as a lighting part of a vehicle lighting window, and even if the organic glass plate thermally expands or contracts,
The present invention was completed as a result of various research aimed at developing a lighting window for vehicles with a structure in which the central portion of the organic glass plate does not protrude upward or flatten.

Structure of the Invention (Means for Solving the Problems) The present invention provides a structure in which the organic glass plate is formed into a frame by means of a weather strip disposed on the peripheral edge of the organic glass plate or a mounting member connected to the weather strip. Absorbing means is provided between the weather strip and the outer periphery of the end surface of the organic glass plate to absorb a change in length due to thermal deformation of the organic glass plate. This is an attempt to solve the above-mentioned problems by providing a lighting window for a vehicle.

(Function) A weather strip attached to the periphery of the organic glass plate.
Alternatively, the organic glass plate and the frame-like frame are sandwiched and connected so as to be movable relative to each other by a mounting member connected to the weather strip.

Further, the weather strip and the organic glass plate are slidably connected without being fixed with an adhesive, and there is a gap between the weather strip and the outer periphery of the end surface of the organic glass plate due to thermal deformation of the organic glass plate. Since an absorption means is provided to absorb the change in length, even if the organic glass plate thermally expands under sunlight or contracts at low temperatures, the peripheral edge of the organic glass plate will remain relative to the frame. The organic glass plate does not protrude upward or deform from a curved shape to a flat shape.

(Example) [First Example] A first example embodying the present invention will be described based on FIGS. 1 and 2.

As shown in FIG. 1, the vehicle lighting window 1 of this embodiment includes a frame 3 and a curved organic glass plate made of polymethyl methacrylate that is indirectly attached to the upper surface of the frame 3 via a weather strip 2. It is formed from 4. A clip 6 having a mouth-shaped cross section is built in as a core metal inside the weather strip 2, and the peripheral edge of the organic glass 4 and the frame 3 are attached to the inner circumferential side of the weather strip 2.
An upper clamping part 2b and a lower clamping part 2a, each having an opening-shaped cross section, are formed to clamp the outer peripheral edge of the holder.

In the frame 3, an outer peripheral edge thereof is bent upward to form an outer locking part 3a, and a central part thereof protrudes upward along the peripheral edge to form a central locking part 3b.
is formed.

A cushioning material 5 having a vertical cross section with a stepped portion 5a inside is placed between the two locking portions 3a and 3b, and the peripheral edge of the organic glass plate 4 is applied to the stepped portion 5a via a sealant 7. section is placed.

Note that a sealant 7 is also provided between the upper holding part 2b and the organic glass plate 4. Furthermore, an engaging protrusion 2X formed on the upper surface of the lower holding part 2a engages with a recess 3z on the back side of the central engaging part 3b of the frame 3.

A gap S is formed as an absorption means between the end face of the organic glass plate 4 and the buffer material 5, and when the organic glass plate 4 is deformed (expanded) and expanded due to heat, this gap S absorbs the elongation. It is meant to be absorbed. Note that the sealant 7 has appropriate adhesiveness.

The frame 3 and the organic glass plate 4 are only pressed by the weather strip 2 via the cushioning material 5, but are not directly fixed to each other. Note that a lip portion 2C is formed on the outer circumferential side (left side in FIG. 2) of the weather strip 2. The lip portion 2C comes into contact with the end surface of the roof of a vehicle (not shown).

The vehicle lighting window 1 of this embodiment configured as described above exhibits the following functions and effects.

When the vehicular lighting window 1 is installed in a car or the like, the interior of the car is illuminated through the organic glass plate 4.

The organic glass plate 4 exposed to sunlight expands thermally, but since the periphery of the organic glass plate 4 and the frame 3 are not fixed, the periphery causes a relative shift, and the center of the organic glass plate 4 It does not protrude upward. Furthermore, since a gap S is formed as an absorption means between the weather strip 2 and the end face of the organic glass plate 4, when the organic glass plate 4 thermally expands, the gap S is increased by the change in the length of the organic glass plate 4. S
becomes narrower. Note that at this time, the sealant 7 in the example is displaced, but since this sealant 7 maintains appropriate adhesiveness, even if the glass plate 4 moves and the sealant 7 portion is displaced, the organic glass The sealing performance between the plate 4 and the weather strip 2 is maintained sufficiently.

In this way, the vehicle daylighting window 1 of this embodiment differs from conventional daylighting windows in that the central part of the organic glass plate 4 does not deform even when subjected to temperature changes. There is no risk of damaging the appearance of the roof.

[Second example] A second embodiment will be explained based on FIG.

The vehicle lighting window 1 of this embodiment, as in the first embodiment, includes a frame 3 and a curved polymethyl methacrylate organic glass plate attached to the upper surface of the frame 3 through a part of the weather strip 2. It is formed from 4.

The frame 3 has an outer locking portion 3a as in the first embodiment.
and a central locking portion 3b are formed.

On the frame 3, a weather strip 2 is attached to the outer edge side of the central locking portion 3b so as to lock with the outer locking portion 3a, and a sealant is applied on the lower clamping portion 2a of the weatherstrip 2. An organic glass plate 4 is mounted via 7. Therefore, the peripheral edge of the organic glass plate 4 is attached to the frame 3 so as to be able to shift relative to the frame 3 by means of the weather strip 2 and the clip 6 as an attaching member.

A gap S is formed as an absorption means between the end face of the organic glass plate 4 and the weather strip 2, and when the organic glass plate 4 is deformed (expanded) due to heat, the change in length is absorbed and the weather strip is formed. This prevents you from pressing 2.

In this embodiment, a plurality of clips 6 as attachment members each having a substantially mouth-shaped cross section are attached at predetermined intervals along the periphery of the organic glass plate 40 to integrally connect the frame 3 and the organic glass plate 4. It is held in between.

The vehicle lighting window 1 of this embodiment configured as described above also exhibits the same functions and effects as the first embodiment.

[Third Example] A third embodiment will be described based on FIG. 4.

An engagement protrusion 2x is formed on the lower surface of the lower holding part 2a of the weather strip 2 in this embodiment, and the engagement protrusion 2x engages with an insertion hole 3y bored in the frame 3 to prevent it from being handled. It has become.

A gap S similar to that in the first embodiment is formed between the end surface of the organic glass plate 4 and the weather strip 2 in this embodiment.

By attaching the weather strip 2 to the peripheral edge of the organic glass plate 4 and then engaging the engagement protrusion 2X of the weather strip 2 with the insertion hole 3y of the frame 3, the vehicle lighting window 1 of this embodiment is assembled. is assembled.

The vehicle lighting window 1 of this embodiment configured as described above also exhibits the same functions and effects as the first embodiment.

The present invention is not limited to the above embodiments, but includes, for example:
It can be implemented in the following manner.

(1) The organic glass plate 4 is manufactured from a transparent synthetic resin such as polycarbonate, acrylonitrile-styrene copolymer, styrene-methyl methacrylate copolymer, etc. in addition to polymethyl methacrylate.

(2) In addition to the gap, a foam material such as a sponge or an air chamber may be provided to absorb the change in length due to expansion.

Further, the absorption means may be formed by combining the gap and the foam.

(3) The vehicle lighting window 1 according to the present invention can be installed in various vehicles, such as one-room cars and buses.

Effects of the Invention As detailed above, the present invention uses an organic glass plate as a lighting section of a vehicle lighting window, and also attaches the organic glass plate to a frame using a weather strip or a mounting member connected to the weather strip. Since the organic glass plate is connected so as to be movable and an absorbing means is provided between the edge of the organic glass plate and the weather strip to absorb changes in length due to thermal deformation, the organic glass plate does not elongate due to temperature changes. It exhibits an excellent effect in that the central portion does not protrude upward or flatten even if it shrinks or shrinks. Therefore, the appearance of the roof of a vehicle equipped with this vehicle lighting window is not impaired, and the dignity of the vehicle is maintained.

[Brief explanation of drawings]

1 to 4 are drawings according to the present invention, in which FIG. 1 is a partial perspective view of the first embodiment, FIG. 2 is a sectional view showing the structure of the attachment of the organic glass plate to the frame in the first embodiment, and FIG. 3 is a sectional view of the second embodiment, FIG. 4 is a sectional view of the third embodiment,
Figures 5 to 7 are drawings related to the prior art, in which Figure 5 is a perspective view of a vehicular daylighting window attached to an automobile, Figure 6 is a partial perspective view of the daylighting window, and Figure 7 is an organic glass plate for a frame. The mounting is a sectional view showing the structure. Weather strip 2, organic glass plate 4, frame 3, mounting member 6, absorption means S

Claims (1)

[Claims] 1. The organic glass plate (4) is attached to the organic glass plate (4) by a weather strip (2) disposed on the peripheral edge thereof or by a mounting member (6) connected to the weather strip (2). (4) is attached so as to be movable relative to the frame-like frame (3), and the organic glass plate is disposed between the weather strip (2) and the outer periphery of the end surface of the organic glass plate (4). (
4) Absorbing means (
A lighting window for a vehicle characterized by having S). 2. The lighting window for a vehicle according to claim 1, wherein the absorption means (S) is a gap.