JPS63227335A - Draining method of transparent board with film - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method of draining water from a transparent plate with a heat-reflecting film used for doors and windows of refrigerators, low-temperature showcases, and the like.

(b) Conventional technology (1) shown in Figure 1 is a low-temperature showcase whose main body is composed of an insulating box (2), and the rear half of the upper surface has a ceiling wall (3) with a door storage section below. , a transparent door (5) whose edges are supported by a pair of left and right rails (4) on the front half of the upper surface, and which slides in the front and back direction to freely open and close the opening for storing and taking out products.
), and is also provided with a cooling device (not shown) necessary to cool the inside of the refrigerator (6).

As shown in FIG. 2, the transparent door is a transparent plate made of glass or the like, which has a curved corner (7A) formed in a part thereof, an upper wall (7B), and a front wall (7C) that slopes downward. (7
), with left and right frames (9A) (9B) equipped with a pair of front and rear rollers (8A) (8B) guided by the rails, and left and right sides, and a handle for opening and closing (IG).
A) A front frame (10) fitted with the front frame (10) is provided along the front edge, and a substantially transparent heat ray reflective film (11) is provided on the back side of the transparent plate (7) as shown in Fig. 3. It's attached. As shown in Figure 4, this film has a base layer (IIA) made of a transparent polyester sheet, etc., and is vapor-deposited on the inside surface of this base layer, transmitting most of visible light and transmitting most of heat rays (external rays). A reflective layer (IIB) mainly composed of silver or titanium oxide, etc. that reflects some parts and blocks most of the ultraviolet rays, and a transparent protective layer <IIC) that protects this reflective layer from moisture in the refrigerator (6). , a glue layer (IID>) such as a transparent acrylic glue formed on the outside surface of the base layer, which has a selective transmission/reflection function, and most of the heat rays that are about to pass through the transparent plate (7). to prevent an increase in the refrigeration load inside the refrigerator (6) by reflecting it toward the outside of the refrigerator, and to maintain the surface temperature of the transparent plate (7) at a temperature higher than the dew point to prevent dew condensation on this surface. used for the purpose.

This heat ray reflective film is generally sold in a roll wrapped around a core material, and when pasting it on a flat transparent plate, the roll film is stretched to a predetermined width using an automatic stretching device. Although an automatic pasting method is used in which the sheets are cut into shapes and pasted on a transparent plate carried by a conveyor, it is also possible to use the above-mentioned pasting method on a transparent plate (7) having a curved corner (7A). However, this method not only caused wrinkles in the film, which deteriorated its heat ray reflection function, but also caused the fatal drawback of impairing the see-through effect.

Therefore, the inventor of the present application sprayed water on the back surface of the transparent plate (7) by a spray method to make the back surface wet, and then applied a heat ray reflective film (11
) on the back side so that the peripheral end surface (20) of the back side is exposed, and press a spatula whose pressing part is made of an elastic material such as rubber from the center of the film. While stretching the film by moving it in each direction shown by the arrows in Figure 3, water between the film (11) and the transparent plate (7) is removed, and the glue layer (IID) is attached to the transparent plate (7). I tried the pasting method.

In this attachment method, the area of the film (11) is made smaller than the area of the back surface of the transparent plate (7) in consideration of the stretching rate of the film (11), so when the film (11) is stretched, The edges of this film do not protrude outward beyond the edges of the transparent plate (7), making it possible to drain water from flat areas such as the top wall (7B) and front wall (7C), and facing the flat areas. Advantages such as no peeling of the peripheral edge of the film (11) and the ability to seal the exposed back surface and the peripheral edge of the film with an oil-based varnish such as Polyurex (trade name) after draining water were obtained. As shown in Figures 3 and 4, the wrinkles caused by the stretching process with a spatula often form peeling parts (12) at both ends of the film (11) facing the corner (7A), and at the same time the transparent plate ( 7) and the film (11), there is a drawback that an air gap (13) is also formed, and depending on the quality of the stretching work, the third
As shown by the chain line in the figure, the blister (14
) remained as a drawback.

(8) Object of the Invention The object of the present invention is to improve the commercial value of transparent plates by solving the problem of poor water drainage, which is a drawback of the prior art.

(d) Structure of the Invention After a heat ray reflective film is layered on a water-wet transparent plate, the water between the transparent plate and the heat ray reflective film is drained from a long and narrow drain portion formed on the transparent plate. How to drain water.

(*) Embodiment FIG. 5 shows an embodiment of the present invention, and the same reference numerals in FIG. 5 as in FIGS. 1 to 4 are the same.

(15A) (15B) are the corners (7A) of the transparent plate (7).
), an appropriate number of tongue pieces (16A) (16B) are formed in accordance with the incisions formed at both ends of the heat ray reflective film (11). This notch is
The number and length vary depending on the degree of curvature of the corner (7A), and if there is only one cut, no tongue piece is formed.
In addition, (17) is a suitable shape formed on the transparent plate (7) by cutting the film (11) so as to be located between both notches (15A) and (15B) and along the longitudinal direction of the corner (7A). There are several long slits for draining water.

This slit (17) acts as a water drain as described later, and the length between both notches (15A) and (15B), that is, the length between the corner (7A) and the film (11) is
It may be provided to separate.

The heat ray reflective film (11) is pasted on the transparent plate (7) using the pasting method shown in Figure 3, but during the stretching process using a spatula, the film (11) and transparent plate (
7〉 is pushed out to the end face of the transparent plate (7) to which the film (11) is not attached, and on the other hand, the water between the corners (7A
) The water near the center is pushed out through the slit (17), and the water at both ends of the corner (7A) is pushed out through the notches (15A) (15B).
), the notch (15A>(15B>) widens outward as shown in FIG. 6, and the tongue pieces (16A) and (16B) are stuck near both ends of the corner (7A). Ru.

Therefore, according to the water draining method, by superimposing the heat ray reflective film (11) on the transparent plate (7) wetted with water, the heat ray reflective film (11) is brought into close contact with the transparent plate (7) by the water. In addition, it is possible to check whether or not air bubbles are formed on the transparent plate (7), and in such a state, the heat ray reflective film (11) is stretched to form slits (17). ) by removing water from the transparent plate (7) without the heat ray reflective film (11).
) can remove air bubbles together with water from other than the peripheral end surface (20) of the transparent plate (7), and as a result of this stretching process, the heat ray reflective film 11) comes into direct contact with the transparent plate (7).
As a result, water can be removed well between the transparent plate (7) and the heat ray reflective film (11), and the transparent plate (7)
The adhesion of the heat ray reflective film (11) to the heat ray reflective film (11) is improved.

(f) Effects According to the present invention described above, by subjecting the heat ray reflective film to a stretching operation and removing water from the water draining portion, air bubbles can be removed together with water from areas other than the peripheral end surface of the transparent plate where the heat ray reflective film is not present. Moreover, as a result of this stretching process, the heat ray reflective film comes into direct contact with the transparent plate, and as a result, water can be removed between the transparent plate and the heat ray reflective film, and the transparent plate The adhesion of the heat ray reflective film to the heat ray reflective film is improved, and formation of water bubbles and air bubbles between the transparent plate and the heat ray reflective film can be avoided.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a low-temperature showcase equipped with a transparent plate with curved corners as a door, Fig. 2 is a perspective view of the door shown in Fig. 1, and Fig. 3 is a perspective view of a door used in the door shown in Fig. 2. FIG. 4 is an enlarged view of the main part of FIG. 3A viewed from the side, and FIG. , a perspective view opposite to FIG. 3, and FIG. 6 an enlarged view of FIG. 5B. (7)... Transparent plate, (11)... Heat ray reflective film, (17)... Slit (water draining part). Figure 4 Figure 2 Figure 3 Figure 4 Figure 186

Claims (1)

[Claims] 1. After layering a heat ray reflective film on a transparent plate wet with water,
A method for draining water from a transparent plate with a film, in which water between the transparent plate and the heat ray reflective film is drained from a long and narrow drain section formed on the transparent plate.