JPH0262246B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a low temperature show case equipped with a transparent door equipped with a heat ray reflective film.

(b) Prior art 1 shown in Fig. 1 is a low-temperature case whose main body is made up 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 panels on the front half of the top surface. A transparent door 5 is supported at both ends by rails 4, and slides in the front and back direction to freely open and close the opening for storing and taking out products.
Equipped with the necessary cooling equipment to cool the

As shown in FIG. 2, the transparent door is mainly composed of a transparent plate 7 made of glass or the like, which has a top wall 7B with a curved corner 7A formed in a part thereof, and a front wall 7C that slopes downward toward the front. Then, the left and right frames 9A, 9B equipped with a pair of front and rear rollers 8A, 8B guided by the rails are fitted along the left and right sides, and the front frame 10 equipped with an opening/closing handle 10A is fitted along the front edge. Furthermore, a substantially transparent heat ray reflective film 11 is attached to the back surface of the transparent plate 7 so as to span the corners as shown in FIG. This film is the 4th
As shown in the figure, there is a base layer 11A made of a transparent polyester sheet, etc., which is vapor-deposited on the inner side of the base layer, and transmits most of visible light, reflects most of heat rays (infrared rays), and reflects most of ultraviolet rays. Reflective layer 1 mainly composed of silver or titanium oxide, etc., which is blocked by
1B, a transparent protective layer 11C that protects this reflective layer from moisture inside the refrigerator 6, and a glue layer 11D such as a transparent acrylic glue formed on the outside surface of the base layer.
Therefore, it has a selective transmission and reflection function.
Most of the heat rays that are about to pass through the transparent plate 7 are reflected toward the outside of the refrigerator to prevent an increase in the refrigeration load inside the refrigerator 6, and the surface temperature of the transparent plate 7 is maintained at a temperature higher than the dew point. It is used for the purpose of preventing dew condensation.

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 using an automatic stretching device. An automatic pasting method is used in which the cut to a predetermined width is pasted on a transparent plate carried by a conveyor, but the above-mentioned curved corner 7A
The use of this method for attaching the transparent plate 7 to the transparent plate 7 not only causes wrinkles in the film, which deteriorates the heat ray reflection function, but also has the fatal disadvantage of impairing the see-through effect.

Therefore, the inventor of the present application sprayed water on the back surface of the transparent plate 7 using a spray method to make the back surface wet, and then applied a heat ray reflective film 11 having an area slightly smaller than the area of the back surface to the peripheral end surface of the back surface. A spatula whose pressing part is made of a slightly elastic material such as rubber is pressed from above the film and moved from the center of the film in each direction shown by the arrows in FIG. While stretching, remove the water between the film 11 and the transparent plate 7,
A method of attaching the glue layer 11D to the transparent plate 7 was tried.

In such a pasting 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 that when the film 11 is stretched, the edge of the film is does not protrude outward beyond the edges of the film 11, and can effectively drain water from flat portions such as the top wall 7B and front wall 7C, and does not cause peeling of the peripheral edge of the film 11 facing the flat portions. Also, after draining, the exposed part of the back side and the peripheral edge of the film can be sealed with an oil-based varnish such as Polyurex (trade name). As shown in FIG. 4, peeled portions 12 are often formed at both ends of the film 11 facing the corner 7A, and at the same time, air gaps 13, or air pockets (bubbles), are also formed between the transparent plate 7 and the film 11. In addition, depending on the quality of the stretching operation, there is also the drawback that blisters 14 remain along the corner 7A as shown by the chain line in FIG. 3, and as a result, convex surfaces are formed in some places on the film 11. Therefore, when used as a transparent door 5, the interior 6
Not only does the see-through effect deteriorate, but also the convex surface expands due to heat ray reflection, and the periphery of the convex surface peels off from the transparent plate 7, resulting in an increase in the area of the convex surface.

(c) Purpose of the invention The object of the present invention is to improve the commercial value by solving the drawback of the prior art, which is poor drainage, and by fully demonstrating the heat ray reflection function of a transparent door.

(d) Structure of the invention Consists of a transparent plate having an upper wall, a front wall, and a curved corner located between the two walls, and a heat ray reflective film attached to the back side of the transparent plate so as to span the corners, A low temperature show case comprising a transparent door having a slit along the surface of the corner facing the heat ray reflective film.

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

15A and 15B are an appropriate number of cuts formed on both ends of the heat ray reflective film 11 facing the corner 7A of the transparent plate 7, and an appropriate number of tongue pieces 16A and 16B are formed along with these cuts. The number and length of these cuts vary depending on the degree of curvature of the corner 7A, and if there is only one cut, no tongue piece is formed. Also, 17 is both notches 15A and 15B.
By cutting the film 11 along the longitudinal direction of the corner 7A, the transparent plate 7
There are a suitable number of draining slits formed on the top. This slit 17 has both cuts 15A and 15B.
It may be provided so as to divide the film 11 into two with the length extending between them, that is, the corner 7A as a border.

Such a heat ray reflective film 11 is attached to the transparent plate 7 by the attachment method shown in FIG. 3, but during the stretching process, water between the film 11 and the transparent plate 7 is Transparent plate 7 to which film 11 is not attached
On the other hand, the water near the center of the corner 7A is pushed out through the slit 17, and the water at both ends of the corner 7A is removed from the notches 15A and 15B, which are directed outward as shown in FIG. The tongue piece 16 becomes wider and becomes wider.
A and 16B are attached near both ends of the corner 7A.

Therefore, the transparent door 5 equipped with such a transparent plate 7 and the heat ray reflective film 11 is installed in the low-temperature show case 1.
When placed in the corner 7A, no water bubbles or bubbles are formed in the corner 7A, which improves the see-through effect inside the refrigerator, and the heat ray reflective film 11 directs most of the heat rays that are about to pass through the transparent plate 7 toward the outside of the refrigerator. It is possible to prevent an increase in the refrigeration load inside the refrigerator 6 due to the reflection, and to maintain the surface temperature of the transparent plate 7 at a temperature higher than the dew point to prevent dew condensation on the surface.

(f) Effects According to the present invention, water can be drained between the transparent plate and the heat ray reflective film through the slits formed along the corners of the transparent plate constituting the transparent door.
The adhesion of the heat ray reflective film facing the corners is improved, and as a result, it is possible to eliminate water bubbles and air bubbles at the corners, improving the see-through effect, reducing the refrigeration load inside the refrigerator, and preventing dew condensation on the surface of the transparent plate. We can provide transparent doors with high commercial value.

[Brief explanation of drawings]

Figure 1 is a perspective view of a low-temperature show case equipped with a transparent plate with curved corners as a door, Figure 2 is a perspective view of the door shown in Figure 1, and Figure 3 is a perspective view of the door used in Figure 2. A perspective view showing the back side of a transparent plate and showing a method of attaching a heat ray reflective film, FIG. 4 is an enlarged view of the main part of FIG. 3A seen from the side, and FIG. 5 shows an embodiment of the present invention. A perspective view opposite to FIG.
FIG. 6 is an enlarged view of FIG. 5B. 5...Transparent door, 7...Transparent plate, 7A...Corner, 1
1... Heat ray reflective film, 17... Slit.

Claims (1)

[Claims] 1 Consisting of a transparent plate having an upper wall, a front wall, and a curved corner located between these two walls, and a heat ray reflective film affixed to the back side of the transparent plate so as to span the corner, the heat ray reflecting film at the corner is A low-temperature show case equipped with a transparent door with slits along the reflective film side.