JPH0329579B2 - - Google Patents

Description

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

(B) Prior art Japanese Patent Application Laid-Open No. 59-148664 (B32B35/00) discloses a transparent plate having curved corners, and a transparent plate having an area smaller than the opposing surfaces of the transparent plate and A substantially transparent heat-reflecting film with adhesive layers on opposite sides and an appropriate number of inward notches formed at both ends opposite the corners of the transparent plate is prepared, and one side of the transparent plate is soaked in water. After wetting the transparent plate with water, a heat ray reflective film is placed on top of the film so that the peripheral end face of this surface is exposed, and a stretching operation is performed from above this film to remove water between the transparent plate and the film, and at the same time, A method of adhering a film to a transparent plate is disclosed, which comprises adhering an adhesive layer to the transparent plate.

(C) Problems to be Solved by the Invention According to the above-mentioned conventional technology, while it is possible to effectively drain water from both edges of the film facing the corner of the transparent plate by making cuts, Not only is it time consuming and troublesome to remove water from the curved surface of the film from the slit formed by the slit, but there is also the problem that the periphery of the slit of the film may peel off if the adhesive strength of the film becomes weak.

(d) Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a transparent plate 7 having a curved corner 7A, an area smaller than the opposing surfaces of this transparent plate, and a transparent plate 7 having a curved corner 7A. A substantially transparent heat ray reflective film 11 having an adhesive layer 11D on the surface facing the transparent plate is prepared, and after one side of the transparent plate is soaked with water, a heat ray is applied so as to expose the peripheral end surface of the transparent plate. The reflective film 11 is superimposed, a slit 14 is formed in the longitudinal direction of the film opposite the corner, and the film is divided into two parts.The film is then stretched from above to form the transparent plate 7 and the film 11. At the same time, after the glue layer 11D is attached to the transparent plate 7, a drying operation is performed, and then the peripheral edge of the film and the exposed surface of the transparent plate 7,
Apply adhesive 1 across the slit and the edge of the film.
To provide a method for attaching a film to a transparent plate 7 provided with 5.

(E) Function In addition to making the area of the film 11 smaller than the area of the back surface of the transparent plate 7, the film 11 is divided into two to form the slit 14, so that the upper wall 7B
Not only can draining of flat portions such as the front wall 7C be effectively performed by using the exposed surface that is the peripheral edge of the transparent plate 7, but also the upper wall portion 11-1 and the front wall portion of the film 11 which is divided into two parts can be effectively drained. Water can be drained well from the slit 14 between 11-2, and during the draining operation, the slit-side edge of the upper wall portion 11-1 of the film 11 moves toward the front wall portion 11-2, and also from the front wall 11-2. Even if the slit side edges of 2 slightly extend in the direction of the upper wall portion 11-1, the slit 14
As a result, the edges of both sides do not overlap, and as a result, the draining operation on the curved surface of the film 11 facing the corner 7A of the transparent plate 7 is extremely efficient. Furthermore, by performing a drying operation after draining the water, residual moisture at the interface between the transparent plate 7 and the film 11 can be removed and the adhesion effect of the film 11 by the adhesive layer 11D can be improved. the peripheral edge of the film 11,
Since the film 11 is provided in a band shape spanning the exposed surface of the transparent plate 7 including the slits 14, the adhesive strength of the film 11 to the transparent plate 7 is increased.

(f) Examples Examples of the present invention will be described below based on the drawings.

Reference numeral 1 shown in Fig. 6 is a low-temperature case whose main body is composed of an insulating box 2, with a top wall 3 on the rear half of the top surface and a door storage section below it, and a pair of left and right rails 4 on the front half of the top surface on both ends. A transparent door 5 whose edges are supported and which slides in the front-rear direction to freely open and close openings for storing and taking out products is provided, and an interior 6 (not shown) is provided.
Equipped with the necessary cooling equipment to cool the

As shown in FIG. 7, the transparent door is mainly composed of a transparent plate 7 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 toward the front. , both left and right frames 9A, 9B equipped with a pair of front and rear rollers 8A, 8B guided by the rails, left and right sides, and a handle 1 for opening and closing.
A front frame 10 having a diameter of 0A is fitted along the front edge, and a heat ray reflective film 11 is attached to the back surface of the transparent plate 7 as shown in FIG. As shown in Figures 1 to 3, this film has a base layer 11A made of a transparent polyester sheet, etc., and is vapor-deposited on the inside side of this base layer, transmitting most of visible light and blocking heat rays (infrared rays). A reflective layer 11B mainly composed of silver or titanium oxide that reflects most of the ultraviolet rays and blocks most of the ultraviolet rays; a transparent protective layer 11C that protects this reflective layer from moisture in the refrigerator interior 6; It has a selective transmission/reflection function, consisting of a glue layer 11D such as transparent acrylic glue formed on the outer side of the refrigerator, and reflects most of the heat rays that try to pass through the transparent plate 7 toward the outside of the refrigerator. It is used for the purpose of preventing an increase in the refrigerating load on the inner 6 and maintaining the surface temperature of the transparent plate 7 at a temperature higher than the dew point to prevent dew condensation on the surface.

12A and 12B shown in FIG.
1, an appropriate number of tongue pieces 13A, 13B are formed in accordance with the incisions. The number and length of these cuts vary depending on the degree of curvature of the corner 7A, and in the case of one cut, that is, in the case of a V cut, no tongue piece is formed. Further, 14 is a slit located between both notches 13A and 13B and formed by dividing the film 11 into two with a cutter or the like along the central longitudinal direction of the corner 7A. The back surface is wetted with water, and the film 11 is layered on top of this, and the film 11 is divided into an upper wall portion 11-1 and a front wall portion 11-2 with the corner 7A as a boundary. The width of the slit 14 is preferably set to several mm, for example, about 2 mm, taking into consideration the extensibility of the film 11 and drainage. 15 is a nearly transparent urethane adhesive;
As shown in the figure, the coating is applied in a band extending over the peripheral edge of the film 11 and the exposed surface of the transparent plate 7. Of course, this adhesive 15 is applied to the slit 14 and the upper wall portion 11- of the film 11 adjacent to this slit.
1. It is also provided at the edge of the front wall portion 11-2.

Next, the method for attaching the heat ray reflective film 11 to the transparent plate 7 will be explained. First, water is sprayed onto the back surface of the transparent plate 7 by an appropriate means such as a spray method to make the back surface wet. A heat ray reflective film 11 having an area slightly smaller than the area of the back surface is overlaid on the back surface of the transparent plate 7 so that the peripheral end surface of the back surface is exposed, and then a slit 14 is formed along the longitudinal direction of the corner 7A. After dividing the film into two parts, an upper wall part 11-1 and a front wall part 11-2,
A spatula whose pressing portion is made of an elastic member with some elasticity such as rubber is pressed from above the film on the upper wall portion 11-1 and the front wall portion 11.
-2 is moved in each direction shown by the arrows in FIG. 5 to stretch the film and push out the water between the film 11 and the transparent plate 7 to the exposed surface of the transparent plate,
Water is also pushed out and removed from the slit 14, and the glue layer 11D is adhered to the transparent plate 7. After that, a drying operation is performed to remove the residual moisture between the transparent plate 7 and the film 11, and then the film 11 is removed. The transparent plate 7 with the film 11 is obtained by applying the adhesive 15 across the peripheral edge of the transparent plate 7 and the exposed surface of the transparent plate 7 including the slits 14.

In such a pasting method, in addition to making the area of the film 11 smaller than the area of the back surface of the transparent plate 7,
Since the film 11 is divided into two to form the slits 14, the flat parts such as the upper wall 7B and the front wall 7C can be drained effectively using the exposed surface that is the peripheral edge of the transparent plate 7. The upper wall portion 11-1 and the front wall portion 11- of the film 11 are divided into two parts.
The water can be drained well from the slit 14 between the film 11 and the film 11 during the draining operation.
Even if the slit side edge of the upper wall portion 11-1 slightly extends in the direction of the front wall portion 11-2, and the slit side edge of the front wall portion 11-2 slightly extends in the upper wall portion 11-1 direction, Because the slit 14 is formed, the edges of both sides do not overlap, and as a result,
Film 11 facing corner 7A of transparent plate 7
Draining work on curved surfaces is much better,
Wrinkling of the film 11 can be avoided. Further, after the draining operation, a drying operation is performed, and in addition to removing residual moisture at the interface between the transparent plate 7 and the film 11 and improving the adhesion effect of the film 11 by the adhesive layer 11D, the adhesive 15 to film 11
Since the film 11 is provided in a band shape spanning the peripheral edge of the transparent plate 7 and the exposed surface of the transparent plate 7 including the slit 14, the film 11
The adhesive force to the transparent plate 7 is increased, and peeling of the peripheral edge of the transparent plate 7 can be avoided.

(g) Effects of the invention The present invention described above has the following effects.

B. In addition to making the area of the film smaller than the area of the back surface of the transparent plate, the film is divided into two to form slits, so that the flat parts such as the top wall and front wall can be drained from the peripheral edge of the transparent plate. Not only can water be drained well by using the exposed surface at the edge, but also the slit between the top and front wall parts of the film, which is divided into two parts, can be used to drain water well. Even if the slit-side edge of the section slightly extends toward the front wall section, and the slit-side edge of the front wall section extends slightly toward the top wall section, because the slit is formed, both edges do not overlap, and as a result, the draining process on the curved surface of the film facing the corner of the transparent plate is extremely good.
Wrinkling of the film can be avoided.

B After draining the water, drying will be carried out.
In addition to removing residual moisture at the interface between the transparent plate and film and improving the adhesion effect of the film by the adhesive layer, adhesive is applied to the peripheral edge of the film and the exposed surface of the transparent plate including the slits. Since the film is provided in a band-like shape, the adhesive strength of the film to the transparent plate is increased, and peeling of the peripheral edge of the film can be avoided.

[Brief explanation of drawings]

The drawings all show an embodiment of the method of attaching a film to a transparent plate according to the present invention, in which Fig. 1 is a perspective view of the entire front of the transparent plate, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Fig.
The figure is a perspective view of the entire back side of the transparent plate before adhesive is applied, Figure 4 is an enlarged view of Figure 3B, Figure 5 is a perspective view of the entire back side of the transparent plate showing the draining direction with an arrow, and Figure 6 is a perspective view of the entire back side of the transparent plate before adhesive is applied.
The figure is an overall front perspective view of a low-temperature show case equipped with a transparent plate as a transparent door, and FIG. 7 is an overall front perspective view of the transparent door. 7... Transparent plate, 7A... Corner, 11... Heat ray reflective film, 11D... Glue layer, 14... Slit, 15... Adhesive.

Claims (1)

[Claims] 1. Prepare a transparent plate having a curved corner and a substantially transparent heat-reflecting film having an area smaller than the opposing surface of the transparent plate and having an adhesive layer on the opposing surface of the transparent plate, After one side of the transparent plate is leaked with water, a heat ray reflective film is overlapped so that the peripheral end face of this side is exposed, and a slit is formed in the longitudinal direction of the part of the film facing the corner, and the film is heated. After dividing into two parts, the film is stretched from above to remove water between the transparent plate and the film, and a glue layer is attached to the transparent plate, and then a drying process is performed, Thereafter, an adhesive is provided spanning the peripheral edge of the film, the exposed surface of the transparent plate, the slit, and the edge of the film.