JPH07111103A - Sheet of adhesive synthetic resin and translucent lighting unit using the same - Google Patents

Abstract

PURPOSE:To make improvements in design and fabrication when fabricating a lighting acrylic cover, so that a transparent acrylic is engaged with a light diffusion acrylic for use as a back plate. CONSTITUTION:A sheet of adhesive synthetic resin is embossed on the overall surfaces of its front and back sides with inversely arched recesses 13b. The sheet of adhesive synthetic resin embossed with the inversely arched recesses is used in gluing acrylic plates of a lighting acrylic cover together, thereby preventing bubbles from remaining and allowing a low-cost acrylic cover of great adhesion strength and good appearance to be manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet-shaped adhesive synthetic resin, an illuminating translucent unit using the same, and a method for manufacturing the same.

[0002]

2. Description of the Related Art FIG.
FIG. 17 is a cross-sectional view showing a conventional lighting device having an acrylic cover for an elevator shown in Japanese Patent Publication No. JP-A-2003-242, in FIG. 16, 1 is a wall, 2 is a ceiling plate, 3 is a lighting fixture, 4 is a mounting fixture for the lighting fixture, 5, 5 is a lighting plate having a plurality of through holes formed therein, 6 is an acrylic cover, 7 in FIG. 17, 7 is an adhesive for bonding the transparent acrylic 12 and the back plate light diffusion acrylic plate 11, 9 in FIG. In FIG. 19, 8
20 is a tack that engages the transparent acrylic 12 and the light diffusion acrylic plate 11 for the back plate, and in FIG. 20, 10 is a bubble generated in the adhesive 7.

Next, the operation will be described. The light emitted from the lighting device 3 which is the light source enters the light diffusion acrylic plate 11 for the back plate of the acrylic cover 6 which is engaged with the through hole of the illumination plate 5, and uniformly in the light diffusion acrylic plate 11 for the back plate. After being diffused, it passes through the transparent acrylic 12 into the car room to illuminate the room.

[0004]

However, the above-mentioned conventional techniques have the following problems. (1) When it is attempted to actually carry out the bonding, it is inevitable that air bubbles enter as described in FIG. 2 of JP-A-58-71506 and FIG. 20 of this specification, which is very design-wise. It became unsightly. (2) If it is necessary to take measures such as adhering one product at a time so that air bubbles do not occur, the price will be high. (3) To avoid the inclusion of air bubbles, if you use more adhesive than the usual required amount, the adhesive may stick out,
The dimensions were incorrect, and the design surface was affected. (4) Theoretically, a large plate may be adhered to be used in small portions, but in reality, the larger the size, the more difficult it is to remove bubbles, and the substance is adhered to each item. (5) Adhesion of each product was a problem in terms of dimensional accuracy such as positioning. (6) Generally, acrylic adhesive is melted like a solvent and adhered. For example, when trying to adhere a milky white light diffusion acrylic plate for a back plate and a colorless transparent acrylic, the melted parts are mixed. It was a problem to fit. (7) Since the strength of the bonded portion is unstable and there is concern about the strength of the bonding, there is a structural limitation. (8) In the pre-bonding step, even if the groove portions are processed and bonded one by one as shown in FIG. 18, they are eventually bonded one by one, which is very high. (9) With structures other than adhesion, striking a tack as shown in FIG. 19 requires a great deal of manpower, and none of them is practical. (10) Currently, the most common cases are, for example, a milky white light-diffusing acrylic plate for a back plate and a colorless transparent transparent acrylic that are engaged with each other with screws. As a result, a contact portion that looks like a spot is generated, and when the usage time exceeds a certain time, dust in the atmosphere gets into the gap due to electrostatic charge and becomes very unsightly. (11) Generally, in the acrylic cover having the structure disclosed in Japanese Patent Laid-Open No. 56-47872, the longer the flange portion of the transparent acrylic formed in a convex shape, the more visible the structure and the mounting structure on the back surface of the illumination plate. Since it becomes easier, I want to make the flange part as short as possible. However, it has been difficult to process the flange portion of the transparent acrylic resin before the bonding due to the limitation in processing. (12) Although it is possible to perform a sand shot on a required portion of transparent acrylic without using the light diffusion acrylic plate for the back plate, there are problems such as adhesion of dirt and scratches, and visible mounting structure.

The present invention has been made in order to solve the above-mentioned problems, and improves the design quality as compared with the prior art, eliminates structural restrictions, and is a low-cost acrylic translucent unit for illumination. It is intended to obtain a cover, and further to provide a manufacturing method suitable for a translucent unit for illumination.

[0006]

The sheet-shaped adhesive synthetic resin according to the present invention has a recess formed on at least one of the front and back surfaces.

Further, a light diffusing member for diffusing the light for illumination and a transparent member for transmitting the diffused light are polymerized to each other, and in the light transmitting unit for illumination provided in the lighting device, the light diffusing member is transparent A member is polymerized and bonded with the above-mentioned sheet-shaped bonding synthetic resin.

Further, a lighting fixture, a lighting plate surrounding the lighting fixture and having a plurality of through holes formed therein, a transparent acrylic plate engaged with the through holes of the lighting plate, and a light diffusion acrylic for the back plate. In a lighting device composed of a translucent unit formed by superimposing a plate in a horizontal parallel manner, the translucent unit is provided between the transparent acrylic plate and the light diffusing acrylic plate for the back plate, and the reverse arch-shaped recess emboss is formed on the entire front and back surfaces. It is formed by polymerizing a sheet-shaped synthetic resin for adhesion, which has been subjected to vacuuming, vacuuming, and then curing by pressure and heating.

Further, a lighting fixture, a lighting plate having a plurality of through holes attached to the lighting fixture and formed therein, a transparent acrylic plate engaged with the through holes of the lighting plate, and a light diffusion acrylic for the back plate. In a lighting device in which a flange portion of the translucent unit formed by transposing a plate in a horizontal parallel manner covers the illuminating plate from the side of the luminaire, the translucent unit is the transparent acrylic plate. And a light-diffusing acrylic plate for the back plate, the sheet-shaped adhesive synthetic resin with reverse arch-shaped recess embossed on the entire front and back is polymerized, vacuum-exposed, and then cured by pressing and heating. The flange portion is formed by processing the transparent acrylic plate.

[0010]

The synthetic resin for sheet-like adhesion in this invention is
It is a thermosetting adhesive sheet with reverse arched concave embossing on the entire front and back sides, polymerized between the transparent member and the light diffusion member for the back plate, vacuum sucked, and then cured by pressing and heating. Since the residual air is smoothly discharged to the outside through the embossed concave portion, mixing of bubbles, mixing of boundary surfaces, and instability of adhesive strength are eliminated.

Further, a transparent acrylic and a light diffusing acrylic plate for the back plate are polymerized with a sheet-shaped adhesive synthetic resin with embossed front and back surfaces between them, and cured by heating and pressurization Since such processing is performed, it is possible to manufacture a product in which protrusions and spots do not occur when the position is accurate, the flange portion is very thin, and the dimensional accuracy is high.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1. 1 is a sectional view taken along the line AA 'of the sheet-shaped adhesive synthetic resin shown in FIG. 2 in Example 1 of the present invention. In FIG. 1, 13 is a sheet-shaped adhesive synthetic resin having reverse arch-shaped recess embossed on the entire front and back surfaces, 13a is a flat portion for initial bonding, 13b is a reverse arch-shaped airway recess for allowing air to escape smoothly, and FIG. It is a top view of the synthetic resin for sheet-like adhesion. FIG. 3 is a diagram showing a method of manufacturing the sheet-shaped adhesive synthetic resin 13 in which the reverse arch-shaped concave portions are embossed on the entire front and back surfaces. In FIG. 3, 13c is a press roller having male and female embossing for embossing the sheet-shaped adhesive synthetic resin 13d, which is smooth on the entire front and back surfaces before embossing, and 13d, the entire front and back surfaces before embossing. Is a smooth sheet-like adhesive synthetic resin, and 13e is a release sheet. 4, 5, 6 and 7 are sectional views of an acrylic cover, which is a translucent unit for illumination, in various cases. In the figure, 11 is a light diffusion acrylic plate for a back plate made of an opaque transparent material, 12 is an acrylic plate made of a transparent transparent material, and 13g in FIGS. 6 and 7 are bubbles.

As shown in FIG. 1, the sheet-shaped adhesive synthetic resin 13 according to the present invention has, for example, polyvinyl butyral as a base composition, and has an arch-shaped airway recessed portion 13b for air release as a sheet-shaped adhesive. Synthetic resin 1
The entire front and back surfaces of No. 3 are embossed, and as shown in FIG. 2, an example of a functional dimensional shape that is effective in terms of effect is determined from experimental values. As shown in FIG. 4, for example, a light diffusion acrylic plate 11 for a back plate made of an opaque translucent material and an acrylic plate 12 made of a transparent translucent material are attached to a sheet-shaped synthetic resin 13 for adhesion.
After attaching by vacuum suction, 100 after vacuum suction
By heating and pressurizing at a temperature of ℃ to 180 ℃, as shown in FIG.

The acrylic cover, which is a translucent unit produced in this manner, is different from the conventional one in that it contains a mixture of bubbles due to a fusible adhesive, a mixture of boundary surfaces, and a stain that occurs when they are stacked without being adhered. Occurrence and instability of adhesive strength, which is an uncertain factor of general adhesion, are eliminated. Further, since there is no gap between the constituent parts, there is no intrusion of dust due to electrostatic charging. In the case of a thermosetting adhesive sheet whose entire front and back surfaces are smooth, unspecified positions come into close contact with each other as shown in FIGS. 6 and 7, and therefore heating and pressurization are performed without air escape, leaving air and leaving bubbles 13g. Become. When the sheet-shaped adhesive synthetic resin 13 with embossed front and back surfaces is used, air is smoothly released through the airway recess, that is, the arch-shaped airway recess 13b plays a role of an appropriate spacer. This allows air to be discharged smoothly when applied. As a result, when heated under pressure, the embossed modified polymer adhesive sheet 13 between the light diffusion acrylic plate 11 for the back plate and the transparent acrylic resin 12 is completely adhered as shown in FIG. It can be cured in the state.

In this embodiment, polyvinyl butyral is used as the synthetic resin 13, but other materials such as polyvinyl alcohol, polyvinyl ether, polyvinyl acetal and vinyl acetate have the same effect. Further, although the concave portion for the airway is formed in an arch shape, it may be any shape as long as it constitutes an airway for discharging air.

Example 2. FIG. 8 shows a bonding device for an acrylic cover as a translucent unit for illumination according to the first embodiment.
FIG. 9 is a cross-sectional view showing a state of the airway of the acrylic cover according to the manufacturing method of the second embodiment. In FIG. 8, 20 is heating pressure, 21 is vacuum suction, 32 is a hydraulic jack, 33 is a closed cover, 34 is a press, 35 is a heater, and 13f in FIG. 9 is a flow of air.

As shown in FIG. 8, the method for manufacturing an acrylic cover according to the present invention is a synthetic resin for sheet bonding, in which the entire front and back surfaces are embossed between the light diffusion acrylic plate 11 for the back plate and the transparent acrylic resin 12. Insert 13. The sealing cover 33 is lowered by the hydraulic jack 32, and after vacuum sealing, vacuum suction 2
When 1 is applied, as shown in FIG. 9, an arch for smoothly releasing air between the light diffusion acrylic plate 11 for the back plate, the transparent acrylic resin 12, and the sheet-shaped bonding synthetic resin 13 with embossed entire front and back surfaces. Remaining air escapes like a flow of air from the shaped airway recess 13b. After the air venting is completed, the pressing force of the press machine 34 and the heater 3
A heating pressure of 20 is applied according to 5. The sheet-shaped adhesive synthetic resin 13 with embossed entire front and back surfaces is a light-diffusing acrylic for the back plate because the entire front and back surfaces are embossed as compared with 13d where the entire front and back surfaces are smooth before embossing. Air bubbles smoothly escape between the plate 11 and the transparent acrylic resin 12. Light diffusion acrylic plate for back plate 1
The sheet-shaped adhesive synthetic resin 13 between 1 and the transparent acrylic resin 12 is completely adhered as shown in FIG. 5, and can be cured without bubbles.

Example 3. 10 and 14 are sectional views of an acrylic cover for lighting according to a third embodiment of the present invention. FIG. 11 is a perspective view of an elevator car room using the acrylic cover for lighting. FIG. 12 is a sectional view taken along line CC ′ of FIG. FIG. 13 is a cross-sectional view of an acrylic cover for lighting showing a cutting region according to the third embodiment. FIG. 15 is an enlarged sectional view of a B part in FIG.

Next, as shown in FIG. 12, so that the flange of the transparent acrylic plate 12 covers the through hole of the illuminating plate 16 from the luminaire 17 side, as shown in FIG.
1 and the transparent acrylic resin 12, the embossed sheet-shaped adhesive synthetic resin 13 is completely adhered to the entire front and back surfaces, and is cured without air bubbles mixed therein. Then, as shown in FIG. Then, the cutting area 22 of the transparent acrylic plate 12 is cut while leaving the light diffusion acrylic plate 11 for the back plate.
When the processing is completed, the shape becomes as shown in FIG. Figure 1
FIG. 5 is an enlarged partial cross-sectional view of a translucent unit of an acrylic cover for lighting showing an example of the configuration of this embodiment in which a flange portion of an actually completed product is measured. With this manufacturing method, the flange portion of the transparent acrylic plate 12 can be made extremely thin. In addition, the sheet-like adhesive synthetic resin 13 between the light-diffusing acrylic plate 11 for the back plate and the transparent acrylic resin 12 is a large plate, is completely adhered, and is cured in a state where no air bubbles are mixed, and then used in small portions. It is also suitable for use and is industrially useful.

[0021]

As described above, according to the present invention, since the airway concave portion for smoothly releasing the air during the bonding work is embossed on the entire front and back surfaces of the sheet-shaped bonding synthetic resin, it will be described below. It has such an excellent effect. (1) Problems such as inclusion of air bubbles when adhering the translucent unit for illumination, admixture of the boundary surface of the adhering part, entry of dust from the gap after adhering, generation of stains, unstable strength, etc. are solved. It (2) Since the corresponding portion of the transparent acrylic plate is processed to form the flange portion of the translucent unit after bonding the translucent unit for lighting with the thermosetting adhesive sheet with embossing on the entire front and back sides, Precision and productivity have improved, and it has become possible to realize a transparent acrylic flange with a very thin thickness.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a sheet-shaped adhesive synthetic resin according to a first embodiment of the present invention.

FIG. 2 is a plan view of a sheet-shaped adhesive synthetic resin according to Example 1 of the present invention.

FIG. 3 is a cross-sectional view showing a method for producing a sheet-shaped adhesive synthetic resin according to Example 1 of the present invention.

FIG. 4 is a sectional view of an acrylic cover according to the first embodiment of the present invention.

FIG. 5 is a sectional view of an acrylic cover according to the first embodiment of the present invention.

FIG. 6 is a sectional view of an acrylic cover according to a first embodiment of the present invention.

FIG. 7 is a sectional view of an acrylic cover according to a first embodiment of the present invention.

FIG. 8 is a diagram showing an acrylic cover bonding apparatus according to Embodiment 1 of the present invention.

FIG. 9 is a sectional view showing a state of an airway of an acrylic cover according to a second embodiment of the present invention.

FIG. 10 is a sectional view of an acrylic cover according to a third embodiment of the present invention.

FIG. 11 is a perspective view of an elevator cab using an acrylic cover according to a third embodiment of the present invention.

FIG. 12 is a sectional view taken along the line CC ′ of FIG.

FIG. 13 is a sectional view of an acrylic cover showing a cutting region according to a third embodiment of the present invention.

FIG. 14 is a sectional view of an acrylic cover according to a third embodiment of the present invention.

15 is an enlarged cross-sectional view of a B part in FIG.

FIG. 16 is a cross-sectional view showing a conventional lighting device for an elevator.

17 is a cross-sectional view showing an acrylic cover of the lighting device of FIG.

FIG. 18 is a cross-sectional view illustrating another example of a conventional acrylic cover for elevators.

FIG. 19 is a cross-sectional view illustrating still another example of a conventional acrylic cover for elevators.

FIG. 20 is a cross-sectional view showing bubbles generated in a conventional acrylic cover for elevators.

[Explanation of symbols]

1 Wall 2 Ceiling Plate 3 Lighting Fixture 4 Lighting Fixture 5 Lighting Plate 6 Acrylic Cover 7 Adhesive 8 Tack 9 Grooves 10 Grooves 10 Bubbles 11 Light-Diffusing Acrylic for Back Plate 12 Transparent Acrylic 13 Embossed synthetic resin for sheet bonding 13a Flat part for initial bonding 13b Arch-shaped airway recess 13c Press roller 13d Synthetic resin for sheet bonding with smooth front and back surfaces 13e Release sheet 13f Air flow 13g Bubbles 14 Screws 15 Nut 16 Lighting plate 17 Light source 18 Elevator cab 19 Ceiling lighting device 20 Heating pressure 21 Vacuum 22 Cutting area 23 Landing unit door 24 Doorway unit entrance / exit pillar 25 Landing unit curtain plate 26 Building wall 27 Face plate 28 Lighting Box 29 Light source 32 Hydraulic jack 3 Sealed cover 34 press 35 heater

Claims (4)

[Claims] 1. A synthetic resin for sheet-like bonding, characterized in that a plurality of recesses are formed on at least one of the front and back surfaces. 2. A light-transmitting unit for illumination provided in a lighting device, wherein a light-diffusing member for diffusing illumination light and a transparent member for transmitting diffused light are polymerized to be transparent to the light-diffusing member. A translucent unit for illumination, comprising a member and a sheet-shaped synthetic resin according to claim 1, which are polymer-bonded to each other. 3. A lighting fixture, a lighting plate having a plurality of through-holes surrounding the lighting fixture and formed therein, a transparent acrylic plate engaged with the through-holes of the lighting plate, and a light diffusion acrylic for the back plate. In a lighting device composed of a translucent unit formed by superimposing a plate in a horizontal parallel manner, the translucent unit is provided between the transparent acrylic plate and the light diffusing acrylic plate for the back plate, and the reverse arch-shaped recess emboss is formed on the entire front and back surfaces. A method for producing a translucent unit for lighting, comprising: forming a sheet-shaped adhesive synthetic resin by subjecting the sheet-shaped adhesive resin to polymerization, vacuuming, and then curing by pressure and heating. 4. A lighting fixture, a lighting plate having a plurality of through-holes surrounding the lighting fixture and formed therein, a transparent acrylic plate engaged with the through-holes of the lighting plate, and a light diffusion acrylic for the back plate. In a lighting device in which a flange portion of the translucent unit formed by transposing a plate in a horizontal parallel manner covers the illuminating plate from the side of the luminaire, the translucent unit is the transparent acrylic plate. And a light-diffusing acrylic plate for the back plate, the sheet-shaped adhesive synthetic resin with reverse arch-shaped recess embossed on the entire front and back is polymerized, vacuum-exposed, and then cured by pressing and heating. A method for manufacturing a translucent unit for illumination, characterized in that the flange portion of is formed by processing the transparent acrylic plate.