JPH0528905U - Measuring tape made of synthetic resin - Google Patents

Abstract

(57) [Abstract] [Purpose] A film base material is formed into a melted shape, and thus has a straightening property in addition to an insulating property. [Structure] A polyphenylene sulfide-based film, or a laminated film structure of a polyphenylene sulfide-based film and a polyester-based film is provided with a graduation line 2 on the surface of a substrate 1, and a tape slit in a band shape is cross-sectionally formed by heat molding. A measuring tape in the shape of a saucer.

Description

[Detailed description of the device] [The purpose of the device]

1

[Industrial applications]

 This invention is used mainly for applications requiring insulation, which is one of the conventional length measuring tools called convex rule.

2

[Prior Art]

 Conventionally, a so-called convex rule has been generally used as a measuring tool of this type, in which scale marks are printed on a steel tape-like shape, but it cannot be used for measurements at locations where insulation is required. For this reason, a tape as disclosed in Japanese Utility Model Publication No. 57-9062 has been devised which has a straightening property obtained by impregnating and hardening a glass fiber base material with a thermosetting resin. However, the product produced by this method has a problem that the tape is easily broken.

[Device configuration]

1

[Means for solving problems]

 In order to prevent the tape from being broken by the thermosetting resin as described above, the scale is applied to the synthetic resin film itself, then slit into strips and heat-formed to make it straight. It is a shape.

2

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a processing step of the present invention. As a material, a polyphenylene sulfide-based film base material 1 is applied by printing a white undercoat, or the material itself is a white mat finish. After printing the graduation line 2 on this, it is slit to a predetermined length and a predetermined width, for example, 19 mm, 22 mm, 25 mm and the like used in the conventional convex. In this state, since the tape itself does not have straightness, a heating roller or a heating press is used to form a soup-like shape. Further, the cover film 3 may be laminated on the surface so that the printing on the surface is not damaged by abrasion.

As another method, the scale line 2 may not be printed on the material itself, but may be printed on the back surface of the cover film 3, and the printed surface and the polyphenylene sulfide film substrate 1 may be laminated. The above state is shown in cross section in FIG.

Next, the materials will be compared. Conventionally used polyester film has a second-order transition point of about 69 ° C that causes softening due to temperature, and if it exceeds 69 ° C after heat molding, it deforms to the state at that time and has a sag shape. Since it loses its straightness, it cannot withstand use at general environmental temperatures. On the other hand, the polyphenylene sulfide film has a high second-order transition point of 92 ° C., which is a temperature at which there is no practical problem.

In addition, when considering the cost of the material and measures against breakage due to impact, by using a laminated structure of polyphenylene sulfide-based and polyester-based film, cost reduction and advantages of each property are combined. Can be considered. For dimensional error due to heat shrinkage, it is sufficient to apply graduation intervals considering the shrinkage rate during graduation printing.

As an example, not only a tape measure that is retracted by using a spring, but also a tape as shown in FIG.

3

[Effect of the device]

 As described above, this invention uses the film itself as the base material and molds it into a saucer shape, so it has straightness and insulation properties, yet it is lightweight, and functionally superior to conventional convexes. It becomes a measuring tape that can compose an excellent product.

[Brief description of drawings]

FIG. 1 is a diagram showing a processing step of the present invention.

FIG. 2 is a sectional perspective view of the measuring tape of the present invention.

FIG. 3 shows another embodiment.

[Explanation of symbols]

 1 film base 2 scale lines 3 cover film

Claims (1)

[Scope of utility model registration request] 1. A polyphenylene sulfide film,
Alternatively, a tape having a band-like slit formed by applying a scale line 2 to the surface of a film substrate 1 having a laminated structure of a polyphenylene sulfide film and a polyester film,
A measuring tape whose cross-sectional shape is made into a bowl shape by heat molding.