JPS5956340A - Production method of explosion-proof picture tube - Google Patents

Abstract

PURPOSE:To fit an explosion-proof frame to a picture tube easily and precisely by pressing a rim band to a panel side wall through a cushioning tape stuck to the opposite face to the panel and tightening a tension bank on the rim band. CONSTITUTION:A cushioning tape 12 is previously stuck on the panel 2 side face of a rim band 13 with an adhesive agent 10. Next, when the rim band 13 is to be fit to a panel side wall section 2-1, the protective film 7 of an adhesive agent layer 8 is removed and the rim band is pressed to the panel and held temporarily. Then, a tension band 6 is fixed over the rim band 13 by welding. etc. At this time, an excess of the adhesive agent layer 8, 9 flows from the cushioning tape into a space surrounded by the rim band 13 and the panel side wall section 2-1 to be firmly filled, thus improving the explosion-proof feature. Thereby, an explosion-proof frame comprised of the cushioning tape, rim band and tension band can be fit easily and precisely.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a method for manufacturing an explosion-proof picture tube, and in particular to an explosion-proof method in which a metal band is pressed through a buffer tape.Technical background and problems of the invention The type of explosion-proof construction shown in Figure 1 is used. That is, the panel (2) of the picture tube envelope is made by joining the funnel (1) and the panel (2) with the enclosing glass (01).
) The explosion-proof frame is attached to the side wall (2-1). After applying the buffer tape to the panel side wall (2-1), press the metal rim band (5) and tension band (6) in that order, and then The tension pad (6) is then tightened to generate a pressing force. The buffer tape used in this case consists of a base tape (4) and an adhesive layer (3).

When manufacturing a picture tube having such an explosion-proof structure, a method is used in which an adhesive layer (3) is first attached to the side wall of the panel. However, the method of directly pasting the buffer tape onto the picture tube body is not only inefficient, but also requires a large-scale special equipment for pasting, resulting in poor work efficiency and poor pasting accuracy.

There is also the disadvantage that when putting the rim band over the rim band, the position of the buffer tape is reflected on the rim band and cannot be confirmed.

OBJECTS OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to improve the work efficiency of the explosion-proof frame and to manufacture a stable explosion-proof picture tube.

SUMMARY OF THE INVENTION The present invention is a manufacturing method for easily and accurately attaching an explosion-proof frame to a picture tube by pressing a rim band against a panel side wall via a buffer tape attached to the surface of the rim band facing the panel, and then tightening a tension band on the rim band. It's a method.

EXAMPLES OF THE INVENTION Examples of the manufacturing method of the present invention will be described below with reference to the drawings. First, the explosion-proof structure consisting of a buffer tape, a rim band, and a tension band is basically the same as that shown in FIG.

FIG. 2 shows an explosion-proof frame structure for explaining the present invention in detail, and a buffer tape α2 is pasted in advance on the surface of the rim band 03) on the side facing the panel. This buffer tape a2 consists of adhesive layers (8) and (10) impregnated with an adhesive from both sides of a base tape (9) such as glass fiber, and an adhesive layer (8) on the panel side. is a protective film (7
) is coated with Further, the width of the base tape (9) in the tube axis direction is formed to be sufficiently smaller than the width of the rim band (13) in the tube axis direction, and the adhesive impregnated into the base tape (9) has a sufficient thickness. Therefore, for example, the thickness of the entire buffer tape including the adhesive layer is formed to be more than twice the thickness of the base tape.

The explosion-proof frame having such a configuration is attached to the picture tube as follows. As shown in FIG. 3, first, a buffer tape (12) is adhered in advance to a predetermined position on the side surface of the panel (2) of the rim band 0 powder using an adhesive (10). Compared to the work of accurately pasting a buffer tape onto the picture tube body, which requires careful handling, this work requires a simple device and is highly efficient, and can be carried out easily.

Further, if a recess or a protrusion is provided in the portion of the rim band 0■ corresponding to the buffer tape, the tape attachment position can be easily controlled with high precision.

Next, attach the rim band (131) to the side wall of the picture tube panel (2-
1,), remove the protective film (force) of the adhesive layer (8) and temporarily fix the rim band against the panel.Then, attach the tension band (6) from above the rim band (13). Tighten the winding and fix the tension band (6) by welding or the like.At this time, due to the pressing force of the band, the excess adhesive layers (8) and (9) are removed from the buffer tape to the rim band (1 (G)) and the panel side wall C2. -1) Flow-filling into the space surrounded by will make the adhesive properties even stronger, improving the explosion-proof properties.If the adhesive is a heat-curing type,
This is effective because the viscosity of the adhesive decreases when heated, making it easier to flow. The width in the tube axis direction of the panel-side facing surface of the rim band and the width of the buffer tape in the tube axis direction can be appropriately selected depending on the amount of adhesive and the type of tube.

Further, the adhesive layer (8) and the OI may be formed only on the surface facing the rim band, in which case the protective film (7) is not particularly required.

Effects of the Invention As described above, according to the present invention, an explosion-proof frame consisting of a buffer tape, a rim band, and a tension band can be easily and accurately attached.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional view showing a conventional explosion-proof frame structure, FIG. 2 is a partial cross-sectional view showing the explosion-proof frame for explaining the present invention in detail, and FIG. 3 is a partial cross-sectional view for explaining the present invention in detail. FIG. 3 is a cross-sectional view showing the explosion-proof frame configuration. (1)... Funnel (2)... Panel (2
-1)...Panel side u (6)...Tension band (7)...Protective film (8), flg)
... Adhesive layer (9) ... Base tape (121
...Buffer tape 0...Rimband agent Patent attorney Nori Chika Kensuke (and 1 other person) Guo Hui

Claims (1)

[Scope of Claims] 1) A method for manufacturing an explosion-proof picture tube in which a rim band and a tension band are pressed onto a side wall of a panel of a picture tube via a buffer tape, wherein A method of manufacturing an explosion-proof picture tube, comprising: pressing the rim band against the side wall of the panel, and then tightening the tension band onto the rim band. 2) The loose tape is composed of a tape base material and an adhesive, and the adhesive is caused to protrude from the tape base material by the pressing force of the rim band or the tension band against the panel. 2. A method for manufacturing an explosion-proof picture tube according to item 1.