JPH0737500A - Device for inserting explosion-proof band - Google Patents

Abstract

PURPOSE:To insert an explosion-proof band without damaging a picture tube by correcting the deflection of an explosion-proof band, which is heated by a heating coil, by means of a shaping guide, and fitting the explosion-proof band into the picture tube under the condition that an opening part of the explosion-proof band is enlarged. CONSTITUTION:An explosion-proof band 2 is set at a predetermined position by a clamp mechanism, and the high frequency current is applied to heat the band 2 for expansion with a heating coil 1. At this stage, a long side of the explosion band 2 is deflected inside by the heating. On the other hand, during the time of heating the band 2, an image tube 4 is positioned on a pad 3 by a carrying device. Under this condition, the image tube 4 is sucked to be supported on the pad 3 by the operation of an air supplying and discharging device. Next, with a rise of a clamp mechanism, the band 2 is moved upward. During the movement, the long side of the band 2 abuts on the guide surface 6a of a guide 6 for pressure-contact, and the band 2 is enlarged outside by the guide 6, and raised. The opening part of the band 2 is larger than the peripheral part of the image tube 4, and fitting along the peripheral part of the tube 4. Next, the band 2 is cooled by a cooler 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an explosion-proof band inserting device used when a loop-shaped explosion-proof band is attached to an outer peripheral portion of a picture tube.

[0002]

2. Description of the Related Art Generally, in a picture tube built into a television receiver or the like, the inside of the tube is in a vacuum state,
Large external pressure is always applied to the panel surface. Therefore, if the strength of the picture tube is insufficient, the picture tube that cannot bear the external pressure may cause a so-called implosion phenomenon, which may lead to a serious accident. Therefore, in order to avoid such an accident, it is necessary to secure sufficient strength of the picture tube.As a structural means for that, a structure in which a loop-shaped explosion-proof band is attached to the outer peripheral portion of the picture tube is known. The device is an explosion-proof band insertion device.

FIG. 3 is a schematic side view showing a conventional explosion-proof band inserting device. In the figure, reference numeral 1 is a heating coil for heating the explosion-proof band 2, and the heating coil 1 is arranged outside the explosion-proof band 2 supported by a clamp mechanism (not shown). On the other hand, reference numeral 3 in the drawing is a suction pad for supporting the picture tube 4, and the suction pad 3 is provided so as to be able to move up and down by a drive cylinder (not shown). Further, reference numeral 5 in the drawing denotes a cooler for cooling the explosion-proof band 2 fitted in the picture tube 4, and the cooler 5 is arranged so as to surround the outer peripheral portion of the picture tube 4 supported by the suction pad 3. .

Here, in the above conventional apparatus, the explosion-proof band is fastened to the picture tube by the following procedure. First, when the explosion-proof band 2 is set on a band chuck (not shown), the heating coil 1 heats the explosion-proof band 2 to thermally expand it. On the other hand, while the explosion-proof band 2 is being heated, the picture tube 4 is supplied onto the suction pad 3 by a carrier device (not shown), and the picture tube 4 is positioned on the suction pad 3 by a positioning mechanism (not shown). It In this state, the picture tube 4 is suction-supported by the suction pad 3. Subsequently, the explosion-proof band 2 moves upward together with a clamp mechanism (not shown) and is fitted into the outer peripheral portion of the picture tube 4 supported by the suction pad 3 as it is. Finally, in this state, the explosion-proof band 2 contracts while being cooled by the cooler 5, and the explosion-proof band 2 is fastened to the outer peripheral portion of the picture tube 4 by this contracting force.

[0005]

However, in the conventional device for inserting an explosion-proof band, when the explosion-proof band 2 is heated by the heating coil 1, the long side of the explosion-proof band 2 bends inward as shown by the broken line in FIG. As shown in FIG. 5, the explosion-proof band 2 of the explosion-proof band 2 has a long side.
There is a problem that it is inserted while rubbing the R surface of the picture tube 4, and the picture tube 4 is scratched by this. Furthermore, when the amount of flexure of the explosion-proof band 2 increases, the picture tube 4
There is also a problem that it becomes difficult to insert the explosion-proof band 2 into the device, or the explosion-proof band 2 cannot be inserted to a specified position.

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide an explosion-proof band insertion device capable of inserting the explosion-proof band without damaging the picture tube.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and comprises a heating coil for heating and expanding a loop-shaped explosion-proof band, and an explosion-proof band heated by the heating coil. An explosion-proof band insertion device comprising: a means for fitting the outer periphery of a picture tube; and a cooler for cooling the explosion-proof band fitted in the picture tube to fasten the explosion-proof band on the outer periphery of the picture tube. Of the long side and short side of the explosion-proof band heated by, has a pair of shaping guides that correct the deflection of at least the long side, and while fitting the explosion-proof band to the picture tube while correcting the deflection of the explosion-proof band with the shaping guide. It is complicated.

[0008]

In the device for inserting the explosion-proof band of the present invention, the bending of the explosion-proof band heated by the heating coil is corrected by the shaping guide so that the opening of the explosion-proof band is expanded more than the outer periphery of the picture tube. In this state, the explosion-proof band is fitted into the picture tube, so that the explosion-proof band can be inserted smoothly and the picture tube is not damaged by the insertion of the explosion-proof band.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a schematic side view showing an embodiment of an explosion-proof band inserting device according to the present invention. In this embodiment, the same components as those in the conventional example will be designated by the same reference numerals. In the illustrated explosion-proof band inserting device, the loop-shaped explosion-proof band 2 is supported by a clamp mechanism (not shown). The heating coil 1 is for heating the explosion-proof band 2 supported by the clamp mechanism, and is arranged so as to face the outer peripheral surface of the explosion-proof band 2. By the way, the heating coil 1 is adapted to perform a heating action by supplying a high frequency current.

On the other hand, the suction pad 3 is for supporting the picture tube 4 supplied by a carrying device (not shown),
The suction pad 3 sucks and supports the picture tube 4 by the operation of an air supply / exhaust device (not shown). Further, the cooler 5 includes the explosion-proof band 2 fitted on the outer peripheral portion of the picture tube 4.
The cooling device 5 is arranged so as to surround the outer peripheral portion of the picture tube 4 supported by the suction pad 3.

Further, in the present embodiment, a pair of shaping guides 6 for correcting the bending of at least the long side of the long side and the short side of the explosion-proof band 2 heated by the heating coil 1 are provided. These orthopedic guides 6 are provided with columns 7 respectively.
Is supported by the suction pad 3, and its upper end is arranged at a position slightly lower than the suction surface of the suction pad 3. Further, the guide surface 6a of each shaping guide 6 is arranged so as to project slightly outward from the outer peripheral portion of the picture tube 4 which is positioned and supported on the suction pad 3. Further, the upper and lower portions of the guide surface 6a are formed in a tapered shape so as to allow the explosion-proof band 2 to slip through smoothly.

In the present embodiment, the shaping guide 6 is arranged only on the long side of the explosion-proof band 2. The reason for this is that the explosion-proof band 2 is significantly bent on heating on the long side. However, depending on the loop diameter of the explosion-proof band 2 and the like, remarkable bending may occur on the short side as well. In that case, the shaping guides 6 may be arranged on both the long side and the short side.

Next, the operation of the device for inserting the explosion-proof band in this embodiment will be described with reference to FIG. First, when the explosion-proof band 2 is set at a predetermined position (lower position in the illustrated example) by a clamp mechanism (not shown), the heating coil 1 heats the explosion-proof band by the supply of high-frequency current to thermally expand it. At this time, the long side of the explosion-proof band 2 is bent inward by heating as shown in FIG. On the other hand, while the explosion-proof band 2 is being heated, the picture tube 4 is supplied onto the suction pad 3 by a carrier device (not shown), and the picture tube 4 is positioned on the suction pad 3 by a positioning mechanism (not shown). . In this state, the picture tube 4
Is sucked and supported by the suction pad 3 by the operation of an air supply / exhaust device (not shown).

Subsequently, the explosion-proof band 2 moves upward as the clamp mechanism (not shown) rises. During the movement, the long side of the explosion-proof band 2 comes into contact with the guide surface 6a of the shaping guide 6 and is pressed against the guide surface 6a as it is, so that the long side of the explosion-proof band 2 is guided by the shaping guide 6. It will move upward while being pushed outward. Thus, since the bending of the explosion-proof band 2 due to heating is corrected by the shaping guide 6,
The opening of the explosion-proof band 2 is wider than the outer peripheral portion of the picture tube 4, and the explosion-proof band 2 is fitted in the outer peripheral portion of the picture tube 4 by raising the clamp mechanism (not shown) in this state. Finally, the explosion-proof band 2 fitted into the picture tube 4 is cooled by the cooler 5 and contracts, and the contraction force causes the explosion-proof band 2 to be fastened to the outer peripheral portion of the picture tube 4.

As described above, in this embodiment, the bending of the explosion-proof band 2 due to heating is corrected by the shaping guide 6, so that the opening of the explosion-proof band 2 is widened more than the outer peripheral portion of the picture tube 4. In this state, the explosion-proof band 2 is attached to the picture tube 4
Since the explosion-proof band 2 is inserted smoothly, the picture-tube 4 is not scratched by the insertion of the explosion-proof band 2. Along with this, the glass cloth tape or the like wrapped around the outer peripheral portion of the picture tube 4 is not damaged.

In the present embodiment, the explosion-proof band 2 having a magnetic seal structure whose long side is wide has been described by way of example, but the present invention is not limited to this and has a loop shape. It is widely applicable to various explosion-proof bands.

[0017]

As described above, according to the present invention,
While the bending of the explosion-proof band heated by the heating coil is corrected by the shaping guide, the explosion-proof band is fitted into the picture tube with the opening of the explosion-proof band being wider than the outer circumference of the picture tube. You can insert an explosion-proof band without damaging it. Also, when the explosion-proof band is fitted into the picture tube, it can be inserted smoothly to the specified position without applying excessive force to the explosion-proof band, which reduces defective insertion of the explosion-proof band and stabilizes the quality. Be promoted.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of an insertion device for an explosion-proof band according to the present invention.

FIG. 2 is a diagram illustrating a procedure for inserting an explosion-proof band in the embodiment.

FIG. 3 is a schematic side view showing an insertion device for a conventional explosion-proof band.

FIG. 4 is a perspective view showing an explosion-proof band.

FIG. 5 is a diagram for explaining a conventional problem.

[Explanation of symbols]

1 Heating coil 2 Explosion-proof band 3 Adsorption pad 4 Picture tube 5 Cooler 6 Shaping guide

Claims (1)

[Claims] 1. A heating coil for heating and expanding a loop-shaped explosion-proof band, means for fitting the explosion-proof band heated by the heating coil onto the outer peripheral portion of the picture tube, and explosion-proof band fitted to the picture tube. In a device for inserting an explosion-proof band, comprising: a cooler for cooling the image-capture tube to fasten the explosion-proof band to the outer periphery of the picture tube, at least one of a long side and a short side of the explosion-proof band heated by the heating coil. An explosion-proof band inserting device, comprising: a pair of shaping guides for correcting the bending on the long side, and fitting the explosion-proof band in the picture tube while correcting the bending of the explosion-proof band by the shaping guide.