JPS5821043B2 - reflective road sign - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a road surface that enables wide-angle reflection by using a recursive reflective sheet, that is, a reflective sheet with a structure in which the directions of reflected light and incident light match, in a spherical shape. The invention relates to reflective labels for use.

As shown enlarged in FIG. 1, the retroreflective sheet a is
A large number of hexagonal small chambers 4 are adjacently partitioned by spacers 3 between the plastic reflective film 1 and the transparent plastic film 2, and each small chamber 4 is provided with one stage of small ball lenses 5 made of plastic or glass. That is, they are regularly arranged and filled without being superimposed vertically, and a pressure-sensitive and heat-sensitive adhesive layer 6 is provided on the lower surface of the plastic reflective film 1.

b is a plastic plate that forms the supporting spherical body;
It is cut to a required size and placed on a perforated base plate 7 of a known vacuum heat and pressure bonding machine C, and a regressive reflective sheet a having the above structure is polymerized thereon, and both are covered with a rubber sheet 8, and then vacuum As a result, the regressive reflective sheet a is heated at approximately 180° C. by the heating light 9 while being pressed against the plastic plate for about 5 minutes, thereby causing the regressive reflective sheet a to become pressure-sensitive on its lower surface. By the action of the heat-sensitive adhesive layer 60, it is firmly adhered to the cyplastics board to obtain a composite board d (composite step).

Next, this composite plate d is placed on a molding base plate 10 of a known vacuum heat molding machine e with the recurrent reflective sheet a facing downward.
It is placed on the top so as to cover the circular hole 11 in the center, and
An annular presser frame 12 whose size matches the outer circumference of the circular hole 11
The composite plate d is held down by the upper electric heater 13 and heated at approximately 120°C to 130°C until the composite plate d becomes soft.
is sucked into the circular hole 11 (molding process).

As a result, the composite plate d is formed into a spherical shape as a whole with an arcuate cross section, and the same spherical reinforcing/supporting frame g is attached to the back side of the spherical body f obtained by cutting and shaping the periphery of the composite plate d. Fit into place.

As described above, the sign of the present invention is a spherical body formed by bonding a retroreflective sheet and a plastic plate into a spherical shape, and a reinforcing and support support frame of the same spherical shape is fitted on the back side of the spherical body. Even if the arrangement interval of the small ball lenses may change due to the stretching of the recursive reflective sheet during spherical molding, the arrangement of all the small ball lenses will change uniformly, so the recursiveness will be uneven. In addition, the recursive reflective sheet will not wrinkle and lose its recursive properties at the wrinkled part, and the same spherical reinforcing and support support frame is fitted on the back side of the spherical body. It prevents damage, is strong, durable, and economical.

Moreover, by using the regressive reflective sheet, which could conventionally only be used in a flat state, by making it into a spherical surface, it has the remarkable effect of enabling wide-angle reflection and wide-angle visibility.

[Brief explanation of the drawing]

Figure 1 is an enlarged perspective view of a part of an example of a regressive reflective sheet and a plastic plate constituting the marker of the present invention, Figure 2 is an explanatory diagram of the composite process, and Figure 3 is a composite diagram obtained by the composite process. FIG. 4 is a partially enlarged sectional view of the plate, FIG. 4 is an explanatory diagram of the molding process, and FIG. 5 is a sectional view of the marker of the present invention. a... Recurrence reflective sheet, b... Plastic board, d... Composite board, g... Reinforcement/post mounting frame, f... ...Spherical body.

Claims (1)

[Claims] 1 A composite board made by bonding a plastic plate and a retroreflective sheet in which small ball lenses are arranged in a large number of adjacent chambers separated by spacers between a plastics reflective film and a transparent plastics film is heated and softened to produce a retroreflective film. This reflective road sign body is characterized by having a spherical body molded without damaging the spherical body, and a frame for reinforcing and supporting a support column having the same spherical shape fitted onto the back side.