JPH11301931A - Reel for winding carrier tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform smooth winding and drawing-out by greatly reducing the bending or curving of the side plate of a reel. SOLUTION: A reel 1 includes a plurality of ruled lines 4 provided in the outer surfaces of the side plates of thick paper made reels 3 and 3 so as to have depths of 1/20 to 1/3 of the thickness of the side plate and widths of 0.2 to 2.0 mm at intervals. Thus, the outward expansion of the side plates 3 and 3 becomes difficult during the winding/drawing-out of a carrier tape, and the bending or curving inside of the tape caused by moisture absorption or drying is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reel for winding a carrier tape used for transporting and storing electronic components.

[0002]

2. Description of the Related Art Carrier tapes are wound on reels, transported and stored, and electronic component manufacturers store electronic components in embossed portions of the carrier tape and cover them with carver tape. In this case, in order to increase the efficiency of the operation, the outer diameter of the reel side plate is increased to increase the winding amount of the carrier tape.

[0003] In Japan, the reels for winding the carrier tape are made of foamed plastic which is lightweight and has little warpage of the reel side plates, and is reused. Carrier tapes will be shipped to foreign countries, and when trying to use the above-mentioned foamed plastic reels overseas, the logistics costs will be high and they cannot be reused, and the problem of disposal of used reels locally must be considered. Must. For this reason, in recent years, there has been a tendency to use cardboard reels for shipping carrier tapes overseas.

[0004]

However, in the case of a reel made of cardboard, when the carrier tape is wound up or pulled out, the side plate easily spreads outward, and the cardboard is warped or bent under the influence of moisture absorption and drying. As a result, there is a problem that winding and drawing out of the carrier tape becomes difficult. SUMMARY OF THE INVENTION An object of the present invention is to provide a carrier tape take-up reel in which a side plate of the reel is significantly reduced in warp and bend, and can be smoothly taken up and pulled out.

[0005]

In the reel for winding a carrier tape (hereinafter abbreviated as "reel") of the present invention, the outer surface of the side plate of the cardboard reel has a thickness of 1/20 to 1/2 of the thickness of the side plate.
A plurality of ruled lines having a depth of 3 and a width of 0.2 to 2.0 mm are provided at intervals. In the present invention, in particular, the side plate and the core are made of cardboard such as chipboard and corrugated cardboard, the side plate has a thickness of 1 to 10 mm, an outer diameter of 300 to 750 mm, and the core has a predetermined width (9.5, 13.5, 17.5, 25.5mm
Etc.).

The ruled line provided on the outer surface of the side plate has a depth of less than 1/20 to 1/3 of the thickness of the side plate and a width of 0.2 to 2.
If it is smaller than 0 mm, the effect of preventing warping or bending due to moisture absorption and drying cannot be obtained. Conversely, if the depth of the ruled line is deeper than the above value of the thickness of the side plate, and if it is wide, the physical strength of the reel will be obtained. And the side plates are easily broken or bent.

The form of the ruled line provided on the outer surface of the side plate is as follows.
There is no particular limitation, and it may be formed linearly from the peripheral edge of the side plate to the opposite peripheral edge, or may be formed in a circle or an ellipse with the center interposed, or in a form in which they are combined, The form created on the side plate by the plurality of ruled lines is preferably symmetrical about the center line of the side plate. The ruled line can be easily formed by forming a die for punching a circular reel side plate into a structure in which a ruled line of a predetermined shape is formed simultaneously with the punching.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a reel according to the present invention will be described with reference to the accompanying drawings. FIG. 1A is a perspective view showing an example of the reel of the present invention, and FIG. 1B is a side view thereof. FIGS. 2A and 2B are front views showing another example of the reel of the present invention, and FIGS. 3A to 3C.
FIG. 2 is a side view of a central portion of the present invention and a conventional reel.

As shown in FIGS. 1 (a) and 1 (b), in a reel 1 of the present invention, corrugated cardboard side plates 3 and 3 are integrally bonded to both side surfaces of a corrugated cardboard core 2. In the configuration, four ruled lines 4 are provided on the outer surface of the side plates 3 and 3 in parallel at intervals above, below, right and left with respect to the center of the side plate. Each of the ruled lines 4 is formed to be shallower than 1/20 to 1/3 of the thickness of the side plate 3 and has a width of 0.2 to 2.0 mm, and is formed symmetrically with respect to the center line A of the side plate. Have been.

FIG. 2 shows another form of the ruled line 4 provided on the surface of the side plate 3 of the reel 1 of the present invention.
In the figure, three ruled lines passing through the center of the side plate are formed radially, and (b) is provided with a circular ruled line around the center,
Three ruled lines reaching the periphery from the ruled lines are formed orthogonal to each other. These ruled lines are formed symmetrically with respect to the center line B of the side plate.

[0011]

EXAMPLES [Example] Two reels of the present invention having a side plate provided with ruled lines in the form shown in FIGS. 2A and 2B were produced. Each reel has a corrugated paper side plate having a thickness of 6 mm and an outer diameter of 670 mm provided with a ruled line of 1 mm depth and a width of 1 mm on both sides of a core made of corrugated paper having a width of 17.5 mm and an outer diameter of 80 mm. And a hot-melt adhesive.

[Comparative Example] For comparison, two conventional reels having the same structure as the above embodiment and having no ruled line on the outer surface of the side plate of the reel were produced. Using the reels of the example and the comparative example, a comparative test of the amount of warpage was performed.

The reels of the above embodiment and the comparative example were heated at a temperature of 15 ° C.
After being left for 1 day in a room at a temperature of 85 ° C. and a humidity of 85%, it was further left for 1 day in a room at a temperature of 15 ° C. and a humidity of 20%, and the warpage and bending of each side plate were shown in FIGS. ). The two reels of the present invention used in the examples are:
As shown in FIG. 3 (a), the tip of the side plate tended to bend slightly outward, but there was no problem in winding and drawing out the carrier tape.

On the other hand, as shown in FIG. 3 (b), one of the reels of the comparative example has a state in which both side plates partially warp greatly in the same direction or warp inward each other. In the other reel, as shown in (c), both side plates are partially bent inward to each other or the end portions are expanded, and in either case, the carrier tape is wound and pulled out. Caused serious problems.

[0015]

According to the reel of the present invention, the side plate is less likely to expand outward when the carrier tape is wound or pulled out, and the moisture absorption, as compared with the conventional reel having no ruled line on the side plate of the reel. Does not warp or bend inward due to drying.

[Brief description of the drawings]

FIG. 1A is a perspective view showing an example of a reel according to the present invention, and FIG. 1B is a side view.

FIGS. 2A and 2B are front views showing examples of ruled lines provided on a side plate of a reel of the present invention.

FIGS. 3A, 3B, and 3C are side views of the present invention and a conventional reel, respectively.

[Explanation of symbols]

 1 Reel 2 Core 3 Reel side plate 4 Ruled line A, B Center line of side plate

Claims (1)

[Claims] An outer surface of a side plate of a cardboard reel has a depth of 1/20 to 1/3 of a thickness of the side plate and a width of 0.2 to 2.0 m.
A reel for winding a carrier tape, wherein a plurality of m ruled lines are provided at intervals.