JPH0211499A - Thermal blanket - Google Patents

Abstract

PURPOSE:To simplify the manufacture and to reduce charged amount by providing stitches energizing metal deposition films mutually, and providing mesh-like stitches on a metal deposition film of uppermost layer so as to energize another metal film of metal deposition film. CONSTITUTION:A thermal blanket set on an artificial satellite is composed of stacked metal deposition films 1 with a specified interval mutually. Each film 1 has at one side of each of its sheet-like film 6 a conductive metal film 2. In this case, the peripheral part of each film 1 is bent back and first stitches 4 comprising a conductive metal thread is disposed along each bent-back part. In this way the films 1 are connected and energized mutually. At the whole of the film 1 in the uppermost layer, second stitches 7 made of conductive metal thread are arranged in a mesh form. The second stitches 7 energizes the film 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thermal blanket for use in an artificial satellite, in which each layer of a metallized film is electrically conductive during the sewing stage.

[Conventional technology]

FIG. 6 is a longitudinal cross-sectional view showing a part of a conventional thermal blanket for mounting on an artificial satellite.

Conventionally, the method of grounding each layer in a thermal blanket for use in a satellite is to attach a ground terminal of a metal vapor-deposited layer to the end of one blanket using an aluminum sheet 10 and rivets 9, as shown in Fig. 6. was.

This work was carried out after the blanket was sewn using polymer material (non-conductive) thread such as polyethylene terephthalate.

Furthermore, when the outermost layer film is required to be electrically conductive (antistatic), a film material coated with electrically conductive coating has been used.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, the ground terminal is concentrated at one end of the blanket, and a difference in the charged potential distribution within the blanket surface tends to appear (the charged potential tends to increase in a portion far from the ground terminal).

Therefore, work to attach the ground terminal must be carried out after the sewing process.

In addition, in response to the demand for further lowering the charging potential, a method of using a film material with a conductive coating on the outermost layer was considered, but the coating film was weak in strength (easily peeled off). There was a problem.

[Failure to solve the problem]

Means provided by the present invention to solve the above problems are as follows:
A first stitch that provides electrical continuity between each of the metallized films in a themed plancket in which a plurality of metallized films in which a conductive metal film is deposited on one side of a sheet-like film are stacked at predetermined distances apart. is provided along the peripheral edge, a second stitch is provided in a mesh shape on the uppermost metallized film, and the second stitch is electrically connected to the metal film of another metallized film, The first and second stitches are electrically conductive.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a sectional view showing the peripheral edge of a thermal blanket according to an embodiment of the present invention, FIG. 2 is a perspective view showing the entire thermal blanket provided with stitches, and FIG. 3 is a sectional view of the thermal blanket.

In the figure, 1 is a metal vapor deposited film, 2 is a metal film 3 that is folded,
4 is a first stitch made of conductive metal, 5 is a metal foil, 6 is a film, and 7 is a second stitch.

The thermal blanket of this embodiment is formed by laminating a plurality of metal-deposited films 1 separated by a predetermined distance.

The metal film coated film 1 is formed by providing a conductive metal film 2 on one side of a sheet-like film 6.

As shown in FIG. 1, the periphery of each metal film N film 1 is folded back and a first stitch 4 is provided along the periphery using a conductive gold thread. Through this first stitch 4, the metal vapor deposited films 1 are integrally bonded, and the metal vapor deposited films 1 are electrically connected to each other.

As shown in FIGS. 2 and 3, the entire metallized film 1 is provided with second stitches 7 made of a conductive metal in the form of a mesh. This second stitch 7 is electrically connected to the gold thread 2 on the back side of the metallized film 1.

The peripheral edge of each metal-deposited film 1 is folded back, and a first stitch 4 made of a conductive metal is provided along the folded-back part, so that electrical continuity is established between each metal-deposited film 1, so sewing is not possible. There is no need to perform ground construction separately from the above process.

The entire metallized film 1 is provided with second stitches 7 made of conductive metal in a mesh pattern, and four of the second stitches 4 pass through the metal M2, so that a conductive path is formed on the surface of the blanket. It acts to lower the potential of the band.

FIG. 4 is a sectional view showing the peripheral edge of a thermal blanket according to another embodiment of the present invention.

In the embodiment shown in FIG. 1, the case was described in which the peripheral edge of each metallized film 1 was folded back, but instead of this,
A metal foil 5 is sandwiched around the peripheral edge of each metallized film 1 and connected to the first stitch 4.
The same effect as in the embodiment shown in FIG. 1 can be obtained even if conduction is established between the two.

FIG. 5 shows an application example of the present invention, and is a sectional view showing a part of a thermal louver in which a first stitch is provided through a metal foil 5. As shown in FIG.

The entire surface of the thermal louver shown in FIG. 2 is provided with a second stitch 7 made of conductive metal in a mesh pattern.
Even if the stitch 4 is provided through the metal foil 5 as shown in the applied example in the figure, the same effect as in the embodiment shown in FIG. 2 can be obtained. Alternatively, a metal conductive tape may be sewn onto the metal foil 50 instead.

In the above-mentioned embodiments, a case was described in which metal threads made only of conductive metal materials were used for stitches 4 and 7, but instead of this, synthetic threads such as borietele/terephthalate or vinylon or metal threads such as By using a metal material made by twisting the threads together for the stitches 4 and 7, elasticity and elongation of the thread can be obtained, and sewing with a sewing machine becomes easy.

〔Effect of the invention〕

As explained above, according to the thermal blanket of the present invention, there is no need to perform grounding work separately from the sewing process, and since the blanket has a conductive path on the surface, it is possible to easily reduce the amount of charge in space. can.

It is a longitudinal cross-sectional view showing a part. .

1...Metalized film, 2,8...
Metal film, 3...Folding, 4...First stitch made of conductive metal, 5...Metal foil, 6...Film, 7 ...Second stitch, 9...Rivet, 10...Aluminum sheet.

Agent Patent Attorney Shinsuke Honsho

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the peripheral edge of a thermal blanket according to the seventh example of the present invention, FIG. 2 is a perspective view showing the entire thermal blanket provided with stitches, and FIG. 3 is a sectional view of the thermal blanket. FIG. 4 is a sectional view showing the peripheral part of a thermal blanket according to another embodiment of the present invention;
The figure shows an application example of the present invention, and is a sectional view showing a part of a thermal louver in which stitching is provided through a metal foil.
The figure shows the first example of a conventional thermal blanket for use on a satellite.
Figure 4 Figure 3 Figure 6

Claims (1)

[Claims] In a thermal blanket in which a plurality of metal-deposited films, each of which is formed by depositing a conductive metal film on one side of a sheet-like film, are laminated and separated by a predetermined interval, the first stitch that provides electrical continuity between the metal-deposited films is located at the periphery. A second stitch is provided along the top layer of the metallized film in a mesh pattern, the second stitch is electrically connected to the metal film of another metallized film, and the second stitch is connected to the metal film of another metallized film. A thermal blanket characterized in that the first and second stitches are electrically conductive.