JPH10181998A - Spiral winding method for carrier tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a winding method for a carrier tape whereby carrying efficiency of the spiral winding carrier tape to a winding reel is improved, and generation of winding failure such as corrugation, embossed collapse, etc. can be reduced. SOLUTION: In the case of repeatedly spiral winding between right/left side plates of a winding reel by a carrier tape 1, while the winding reel 3 is swing to the right/left relating to a winding direction in each one period, the carrier tape is wound, and a swing angle of this winding reel is set from a right angle in a range of ±tan<-1> (carrier tape width + winding clearance/length per one turn), the spiral winding is repeated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spiral winding of a carrier tape on a take-up reel, which is effective for storing, storing and transporting a large number of various electronic components and for smooth operation with a surface mounter. To a winding method for carrying out.

[0002]

2. Description of the Related Art In a conventional carrier tape winding method, the axis of the winding reel is always fixed at a right angle to the winding direction of the carrier tape. By changing the relative position in the horizontal direction, the carrier tape was spirally wound.

[0003]

However, in the above-mentioned conventional method, when the diameter of the wound portion of the reel (hereinafter, referred to as a core) is small, the carrier tape is strongly twisted and deformed due to distortion, so that the carrier tape cannot be used. Therefore, even if the winding amount is sacrificed, it is necessary to use a core having a certain large diameter.

Further, in this conventional method, all the carrier tapes wound around the core are double-triple, and as the winding progresses, the embossing continuously formed on the carrier tape is such that the bottom portion of the upper layer is lower than the lower layer. Stuck in the opening of
A step occurs in the winding. The resulting step is
Furthermore, since the winding torque applied to the emboss of the carrier tape wound thereon is concentrated on a part, undulation or emboss collapse may be caused.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of spirally winding a carrier tape which can improve the efficiency of transporting the spirally wound carrier tape and reduce the occurrence of poor winding such as undulation and embossing collapse. And

[0006]

Means for Solving the Problems The present inventor has made intensive studies to solve the above problems and completed the present invention. That is, in the present invention, when the winding between the left and right side plates of the take-up reel is repeatedly spirally wound with the carrier tape, the carrier tape is taken up while swinging the take-up reel left and right with respect to the winding direction every cycle, and By twisting the take-up reel within a range of ± tan ^-1 (width of carrier tape + winding clearance / length per rotation) from a right angle to the take-up direction, the twist added to the carrier tape SUMMARY OF THE INVENTION A gist of the present invention is to provide a method of spirally winding a carrier tape, which eliminates deformation due to distortion, and additionally reduces embossing intrusion, undulation and crushing of embossing.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a state in which a carrier tape is wound around a reel, and FIGS.
FIG. 3 is a front view showing a carrier tape winding step according to the winding method of the present invention. In the figure, 1 is a carrier tape, 2
Is a guide roll, 3 is a take-up reel, and 4 is a core.
The step of spirally winding a carrier tape according to the method of the present invention will be described with reference to FIGS. As shown in FIG. 1, the formed carrier tape 1 is wound around a core 4 of a take-up reel 3 (hereinafter, simply referred to as “reel”) with the fixed guide roll 2 as a relay point. The reel 3 always makes one rotation, and the width of the carrier tape 1 +
It is assumed that the reel moves laterally between the left and right plates of the reel by the winding clearance, and reciprocates with the reel width between the left and right plates as one cycle.

As shown in FIG. 2A, the swing angle θ of the reel 3 with respect to the winding direction (the arrow line) of the carrier tape 1 is initially perpendicular to the winding direction of the carrier tape 1; After the start, while the carrier tape 1 is wound around the core 4 of the take-up reel 3 by one rotation, the carrier tape 1 tilts to the left by θ degrees [tan ^-1 (width of the carrier tape + winding clearance / length per rotation)] [ FIG. 2 (b)]. This swing angle θ is held until one rotation before the end of the first cycle,
In the last round, the swing angle θ of the reel 3 becomes perpendicular to the winding direction of the carrier tape 1 again (FIG. 2C). In the second cycle, during the winding of one turn, the right side opposite to the first cycle is tilted by θ degrees [FIG. 2 (d)], and the swing angle θ
As in the first cycle, is held until one rotation before the end of the second cycle, and in the last round, it becomes perpendicular to the winding direction of the carrier tape again (FIG. 2 (e)). The above process is defined as one process, and the same process is repeated for each cycle. In the above description, the length per rotation in the first cycle (after the start of winding) indicates the outer periphery of the core, and the length per rotation in the second cycle is obtained by adding the emboss depth to the core diameter. Therefore, the length per rotation in the above equation becomes larger and longer by the emboss depth as the process proceeds.

According to the spiral winding method of the carrier tape of the present invention, the swing angle of the reel is accurately controlled in each cycle in the above-described steps, so that the deformation due to the twist and distortion applied to the carrier tape can be avoided. .
Therefore, the core diameter of the take-up reel can be made smaller than before, so that the take-up amount can be increased without changing the dimensions of the side plate of the reel, and the transport efficiency can be improved.
Furthermore, the core diameter can be 60 mm, depending on the type and shape of the carrier tape. In addition, since the embosses continuously formed on the carrier tape are accurately held at different angles in each cycle, it is possible to reduce defects such as emboss crushing, undulation, and the like caused by embossing inset. .

[0010]

EXAMPLES Hereinafter, specific embodiments of the present invention will be described with reference to examples, but the present invention is not limited thereto. [Example 1] 12 mm width, 8 mm pitch, sheet thickness 0.3 mm,
A carrier tape with a component storage emboss of 4 mm × 4 mm and 4 mm in depth is used.
Using a 0 mm reel, spiral winding was tried by the process of the present invention shown in FIGS. 2 (a) to 2 (e).

The swing angle θ of the reel 3 to the left with respect to the winding direction of the carrier tape in the first cycle shown in FIGS. 2A to 2C is tan ^-1 (the width of the carrier tape + the winding clearance / 1). Tan from the formula of length per rotation)
⁻¹ [(12 + 1) / 100 × π] = 2.4 °, and the swing angle θ to the right of the reel 3 in the second cycle shown in FIG.
tan ⁻¹ {(12 + 1) / [100+ (4 × 2)] × π} = 2.2 ° (−2.2 ° because the second cycle is inclined opposite to the first cycle).

With the above structure, the swing angle with respect to the winding direction of the carrier tape is controlled in each cycle, and spiral winding is performed up to a diameter of 400 mm. A conventional central core 220 mm reel conventionally used for spiral winding is used. It could be wound 1.3 times more than when used. In addition, as compared with the spiral winding by the conventional method, the winding step due to the embossing and the emboss crush and undulation caused by the winding step are improved, and the effect is also recognized in this respect.

[0013]

According to the present invention, the conventional problems in spiral winding of a carrier tape can be solved. That is, when spiral winding is performed, the take-up reel is swung left and right with respect to the winding direction in each cycle, so that deformation caused by twisting and distortion applied to the carrier tape is improved. Further, with this, spiral winding on a reel having a core having a smaller diameter than before becomes possible, and transport efficiency can be improved. In addition, there is an effect of reducing emboss crushing and undulation due to a winding step due to emboss engagement.

[Brief description of the drawings]

FIG. 1 is a side view showing a state where a carrier tape is wound on a reel.

FIGS. 2A to 2E are front views showing a step of winding a carrier tape by a spiral winding method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carrier tape 2 Guide roll 3 Reel for winding 4 Core

Claims (1)

[Claims] When repeatedly winding spirally between a left and a right side plate of a take-up reel with a carrier tape, the carrier tape is taken up while swinging the take-up reel left and right with respect to a take-up direction every cycle. Spiral winding of a carrier tape characterized by repeating the swing angle of the reel within a range of ± tan ^-1 (width of the carrier tape + winding clearance / length per rotation) from a right angle to the winding direction. Method.