JPH0678365U - Winding core for top cover tape - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] The present invention provides winding cores for top cover tapes with high dimensional accuracy as well as preventing winding collapse and deformation during transportation and storage, and paper dust generation and scattering. . [Structure] The top cover tape winding core 2 is made of a thermoplastic material subjected to antistatic treatment.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a core for a top cover tape for sealing an opening of a carrier tape used for storing and storing a large number of parts such as various electronic parts and precision equipment parts. .

[0002]

[Prior art]

 Conventionally, for example, a carrier tape a for an electronic component has a tape-like structure in which a large number of concave containers c for individually storing electronic components b are continuously arranged in the flow direction as shown in FIG. After the component b is stored in the concave container c, its upper surface is covered and adhered with a flexible top cover tape d, which is wound around a dedicated winding core e in a roll shape for transportation and storage. I am offering. For the core (not shown) of the top cover tape d, a paper tube made of cardboard cut to the width of the tape has been used exclusively. However, the paper tube cannot be expected to have good dimensional accuracy due to its material, and it is easily affected by temperature and humidity. When the paper tube shrinks due to weather conditions, the top cover tape retains the winding shape only by its own winding tension. There was a sparse part between the layers, causing the roll to collapse during transportation and storage, and the mounting failure on the taping machine due to the deformation of the paper tube. Also, since the buckling strength is weak, increasing the winding tension increases the internal stress, causing the phenomenon of inward bending of the paper tube. Moreover, recently, as the length of the carrier tape becomes longer, the length of the top cover tape tends to become longer, and the insufficient strength of the winding core has become a problem. Furthermore, during winding or taping, when rotated on the axis where the top cover tape of the device is mounted, the surface of the paper tube may rub and fine paper dust may be generated and scattered to adhere or contaminate electronic components. there were.

[0003]

[Problems to be solved by the device]

 Therefore, an object of the present invention is to provide a winding core for a top cover tape which has high dimensional accuracy while preventing collapse and deformation of the roll during transportation and storage and generation and scattering of paper dust.

[0004]

[Means for Solving the Problems]

 The core for a top cover tape according to the present invention is characterized in that a thermoplastic is subjected to an antistatic treatment.

Hereinafter, details of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a first embodiment of a core for a top cover tape of the present invention (hereinafter, abbreviated as a core) in a state in which the top cover tape is wound into a roll. The top cover tape 1 slit to a predetermined width is wound around the winding core 2 having the same width with the surface 11 having the adhesive layer inside by a winding tension high enough to prevent collapse of the winding. It is transported, stored. Further, in this state, the tape is mounted on a taping machine (not shown) and used for taping on the carrier tape. 2 is a front view (a) and a vertical side view (b) of a second embodiment of the winding core of the present invention, in which 22 is an annular winding core similar to the above, and 23 is a peripheral side portion thereof. Marks and letters that represent the company name and product name, etc. are provided on the surface, and the surface is delustered so that it can be easily written with a pencil if necessary.

FIG. 3 is a front view (a), a vertical side view (b) and a rear view (c) of a third embodiment of the winding core of the present invention, in which 32 is a winding core and 33 is Marks and characters similar to those described above are provided on the peripheral side portion, and 34 is a recessed portion provided with a constant surface thickness during molding. If necessary, a desiccant may be directly charged into the recessed portion 34, and the opening end thereof may be covered with a moisture-proof film fixed with an adhesive for easy opening, or the desiccant may be wrapped in a moisture-proof film or moisture-proof. After charging the bag or container made of a film, it is appropriately fixed in the recess 34. FIG. 4 is an exploded explanatory view showing a fourth embodiment of the winding core of the present invention, in which 42 is a winding core, 44 is a concave portion provided with a constant surface thickness during molding, and 45 is a different diameter. A jig serving also as a shaft, 46 is a protrusion which can be attached to and detached from the recess 44. By changing the inner diameter of the different diameter shaft / combined jig 45 and fitting the projection 46 into the recess 44 of the winding core 42 to integrate them, shafts of different diameters can be accommodated.

Examples of the material of the thermoplastic used for molding the winding core of the present invention include resins such as polyester, polystyrene, polycarbonate, vinyl chloride and ABS. The winding core is molded by various methods, but injection molding is preferable from the viewpoint of dimensional accuracy. Also, in order to prevent the components contained in the carrier tape from being charged with static electricity by the winding core from being destroyed by static electricity or being contaminated by the adhesion of dust or the like, a conductivity-imparting agent is added to these thermoplastics. Antistatic treatment is applied by a method such as kneading and molding, or applying an antistatic agent to the surface of the core obtained by molding the thermoplastic plastic as it is.

As the conductivity-imparting agent kneaded into the thermoplastic, carbon black such as channel black, Ketjen black, oil furnace black, acetylene black, and thermal black; PAN-based or pitch-based carbon fiber; natural Or artificial graphite; metal powder of Cu, Ag, Ni or their alloys; ZnO, SiO ₂ , SiO ₂ -TiO ₂ -based metal oxides; metal flakes of Al, brass, etc .; Al, Ni, stainless steel, etc. Metal fibers; further, glass beads coated with metal, carbon plated with metal, and the like can be mentioned, and these can be used alone or in combination of two or more. The amount used is preferably 5 to 30 parts by weight, more preferably 20 to 25 parts by weight, based on 100 parts by weight of the thermoplastic. On the other hand, as the antistatic agent applied to the surface of the wound core after molding, various cationic, anionic, nonionic or amphoteric surfactants are used. Specific examples include alkyl amine salts, alkyl quaternary ammonium salts, alkyl imidazoline derivatives, fatty acid amine salts, alkyl phosphate ester salts, alkyl sulfate ester salts, polyoxyethylene alkyl ethers, fatty acid glycerin esters, etc. These are used alone or in combination of two or more. The amount used 0.05 to 1 mg / cm ^2, particularly preferably 0.1~ 0.2mg / cm ^2. In addition to the above conductivity-imparting agents, thermoplastics may also contain stabilizers, plasticizers, fillers, colorants, lubricants, processing aids, antioxidants, UV inhibitors, flame retardants, etc. A fixed amount can be compounded.

[0009]

[Action]

 Since the winding core of the present invention is made of a thermoplastic material, its shape hardly changes due to weather conditions such as temperature and humidity, and it has sufficient strength against the inward stress caused by winding the top cover tape. It is possible to prevent the occurrence of products that cannot be mounted on the taping machine due to the collapse of the winding or the deformation of the winding core during transportation and storage without being bent inward. Further, in the case where the winding core has a recessed portion, the strength of the winding core is improved and the weight is reduced. Further, it can be molded with better dimensional accuracy than a paper tube, and paper dust is not generated or scattered due to surface friction. Furthermore, by applying an antistatic agent or kneading a conductivity-imparting agent with the material resin, it is possible to prevent parts from being destroyed by static electricity. By molding letters or marks on the surface, it is possible to obtain the effect of making it easier to identify the product type.

[0010]

【Example】

 Hereinafter, specific embodiments of the present invention will be described with reference to examples. Example 1 A ring-shaped winding having an inner diameter of 76 mm, an outer diameter of 92 mm and a width of 5.3 mm was prepared using a mixture prepared by kneading 20 parts by weight of oil furnace black as a conductivity-imparting agent with 100 parts by weight of ABS resin. The core was molded by injection molding. Similar to the one shown in Fig. 2, this winding core has a recess with a width of 4.5 mm, a length of 50 mm and a depth of 0.7 mm on one side, and the manufacturer's name is embossed on it. there were. A top cover tape with a width of 53 mm and a thickness of 0.05 mm was wrapped around this core for 200 m under a tension of 100 gf and left in a constant temperature bath at a temperature of 50 ° C and a humidity of 95% for 3 months, but no deformation or collapse occurred. .

Example 2 Using a mixture prepared by kneading 100 parts by weight of ABS resin with 0.5 part by weight of phthalocyanine blue, which is a cyan pigment, as a colorant, an inner diameter: 76 mm, an outer diameter: 92 mm, and a width of 13.5 mm The ring-shaped winding core was molded by injection molding, and the surface thereof was coated with a tetracyanoquinodimethane complex as an antistatic agent at a rate of 0.1 mg / cm ² . Similar to the one shown in FIG. 3, this winding core has the same manufacturer's name as that of Example 1 on one side, and the thickness of the side is left 1.5 mm, and the width of the opposite side is 4 mm. The grooves were provided with 1.2 mm-thick columnar portions at approximately equal intervals of 11 mm. A top cover tape was wound around this winding core in the same manner as in Example 1 and left to stand, but no deformation or winding collapse occurred. The cores obtained in the above two examples have better dimensional accuracy than the commonly used paper tubes, and the buckling strength against the stress to the inside of the circle was measured using a push gauge. , A value 4 to 6 times that of the paper tube was obtained. Further, when the electric resistance value of the surface was measured, the value was 10 ¹⁰ to 10 ¹² Ω, and the antistatic effect was confirmed.

[0012]

[Effect of device]

 The winding core of the present invention has good dimensional accuracy, and does not cause winding collapse or damage to the winding core during transportation or storage, and does not contaminate stored items in the carrier tape. There is an effect that it is possible and the kind of product can be easily identified.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a winding core according to the present invention.

2A and 2B show a second embodiment of the winding core according to the present invention, wherein FIG. 2A is a front view and FIG. 2B is AA of FIG. 2A.
It is a vertical side view in a line.

3 shows a third embodiment of the winding core according to the present invention, wherein FIG. 3 (a) is a front view and FIG. 3 (b) is BB of FIG. 3 (a).
A vertical side view taken along a line, and FIG. 7C is a rear view.

FIG. 4 is a development explanatory view showing a fourth embodiment of the winding core according to the present invention.

FIG. 5 is a perspective view showing how the top cover tape used in the present invention is used as a carrier tape.

[Explanation of symbols]

1 ... Top cover tape, 2, 22, 32, 42 ... winding core.

Claims (1)

[Scope of utility model registration request] 1. A core for a top cover tape, which is characterized in that an antistatic treatment is applied to a thermoplastic.