JPH0356546Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement in a wound body formed by winding a series of electronic components, in which a large number of electronic components are held on a band-shaped holder, around a reel or the like.

BACKGROUND TECHNOLOGY As shown in FIG. 6, an electronic component chain stores and holds electronic components 11 such as a multilayer capacitor chip or a resistor chip in each recess 14 of a band-shaped holder 13 with a feed hole 12, or As shown in the figure,
By fixing and holding the lead wires 15 of the electronic components 11 to the band-shaped holder 13 with an adhesive tape 16 or the like, approximately 1,000 to 5,000 electronic components 11 are connected in series. Usually, as shown in FIGS. 8 and 9, the core 21 of the reel 2
is wound directly on the When the electronic component 11 is taken out from the electronic component series 1 and mounted on a printed circuit board, for example, as shown in FIG.
Using a feeding means such as a sprocket 3 that meshes with the feeding hole 12 of the band-shaped holder, the electronic component string 1 is unwound from the reel 2 and intermittently fed to the automatic mounting machine 4 to mount the electronic component 11. There is.

However, in the case of a wound body in which the electronic component string 1 is directly wound around the winding core 21 of the reel 2 as described above, there are the following problems.

Problems to be Solved by the Invention That is, the diameter of the flanges 22 on both sides of the reel 2 around which the electronic component chain 1 is wound is set to approximately 180 mm due to various constraints in the case of the electronic component chain 1 shown in FIG. 6, for example. In addition, the number of electronic components 11 in electronic component series 1 per reel is said to be approximately 4,000 at maximum in the case of multilayer capacitor chips and 5,000 in the case of resistor chips. If the diameter of the core 21 is set too large, it may not be possible to wind the electronic component chain 1 all the way to the end.To prevent this, the diameter of the core 21 should be set to approximately 50 to 65 mm.
It is necessary to set it to .

However, if the diameter of the winding core 21 is small in this way, the curvature of the part near the winding start of the electronic component string 1 becomes large, resulting in a strong curl, and when the winding is rewound, the part near the winding start ends will curl significantly. become. Therefore, when the electronic component chain 1 is unwound by the sprocket 3 and fed intermittently to the automatic mounting machine 4 as described above, the curled part near the beginning of the winding may rise as shown by the dashed line in Fig. 10. It no longer meshes with the sprocket 3, resulting in poor feeding.

The problem of poor feeding due to such winding problems is especially when winding a short electronic component chain with a small number of electronic components, as shown in FIG. This is important because at the end of the winding, the diameter of the winding becomes smaller as a whole, which may cause curling problems in the entire series of electronic parts.

This invention was made in view of the above circumstances,
The purpose of this invention is to prevent the curling of a winding body of a series of electronic components, particularly a series of electronic components having a small number of electronic components and a short length, and to solve the problem of poor feeding due to the curl.

Means for Solving the Problems Therefore, the gist of the present invention is to provide an attachment having a predetermined thickness around the outer periphery of the winding core of a wound body in which a series of electronic components as described above are wound. It is.

Hereinafter, the present invention will be described in detail with reference to Examples.

Embodiment FIG. 1 is a side view showing an embodiment of the wound body according to the present invention, and FIG. 2 is a cross-sectional view taken along the line -
Here, 1 indicates an electronic component series, 2 indicates a reel, and 5 indicates an attachment.

The reel 2 on which the electronic component series 1 is wound has a winding core 21
and flanges 22 on both sides, and this winding core 2
1 and flange 22 are set to about 50 to 65 mm and about 180 mm for the reasons mentioned above in the case of an electronic component series holding chip-like parts, and the outer peripheral surface of the winding core 21 is originally Parts series 1
A plurality of insertion grooves 23 into which the winding start end is inserted are formed at equal angular intervals. An attachment 5, which is a feature of the present invention, is attached to the outer periphery of the winding core 21 of the reel 2, and the electronic component series 1 is wound around the attachment 5.

The attachment 5 in this embodiment is the third
It consists of a pair of semicircular bodies 51, 51 made of paper or synthetic resin as shown in the figure, and these semicircular bodies 5
The inner radius r of the winding core 21 is set to be approximately equal to the radius of the winding core 21, and an electronic component series 1 is provided on the outer peripheral surface.
A suitable number of insertion grooves 52 are formed into which the winding start end of the winding is inserted. However, these semicircular bodies 51,
51 is fitted onto the winding core 21, and both abutting end surfaces 52
By joining them together with adhesive or the like as necessary, they are irremovably attached to the winding core 21.

In this case, as shown in FIG. 4, mushroom-shaped protrusions 54 are provided on each abutting end surface 53 of one semi-annular body 51, and mushroom-like protrusions 54 are provided on each abutting end surface 53 of the other semi-annular body 51. 54 receiving groove 55
, and further on the inner peripheral surfaces of both semi-annular bodies 51',
The protrusion 5 inserted into the insertion groove 23 of the winding core 21
6, the mushroom-shaped protrusion 54
Both semicircular bodies 5 can be removed by simply inserting them into the receiving grooves 55.
1 and 51 can be joined, the attachment work to the winding core 21 is extremely simple, and since the protrusion 56 on the inner circumferential surface is inserted into the insertion groove 23 of the winding core 21, there is an advantage that the attachment 5 can be prevented from spinning idle.

As for the attachment, in addition to the split type attachment as illustrated in FIGS. 3 and 4, a non-divided type attachment as illustrated in FIG. 5 can also be employed. That is, this attachment 5' is made of deformable synthetic rubber,
An insertion groove 5 at the starting end of the electronic component series 1 is formed on the outer circumferential surface of the open annular body 51' made of a material such as soft synthetic resin.
2', a mushroom-shaped projection 54' is formed on one end surface, and a receiving groove 5 for the projection 54' is formed on the other end surface.
These attachments 5' can be easily assembled by elastically expanding the open annular body 51', fitting it onto the winding core 21, and then inserting the protrusion 54' into the receiving groove 55'. It has the advantage of being wearable. Note that the protrusion 56 in the embodiment shown in FIG. 4 is shown in FIG.
It goes without saying that it may be provided in the embodiment shown in FIG.

Thickness t of attachments 5, 5' as above
Regarding the length of the electronic component series 1 to be wound, the number of electronic components, etc., the maximum thickness dimension is determined within the range where the end of the winding of the electronic component series 1 does not protrude beyond the flanges 22 on both sides of the reel 2. However, the number of electronic parts should be divided into those with approximately 1,000, 2,000, 3,000, and 4,000 electronic components in advance, and then set the appropriate thickness for each. It is desirable to prepare several types of attachments and select and use the attachment with the optimum thickness depending on the number of electronic components in the series of electronic components 1 to be wound.

Incidentally, the electronic component series 1 is as shown in FIGS. 6 and 7, and since this has already been described in the prior art section, the explanation will be omitted.

Function and Effect As described above, the attachment 5,
5' and wind the electronic component chain 1 thereon, the winding diameter at the start end of the electronic component chain 1 is smaller than the thickness t of the attachment, compared to the case where the electronic component chain 1 is wound directly on the winding core 21. Since the curvature of the portion near the beginning of the winding is reduced, this portion is less prone to curling and hardly curls when rewound. Therefore, in the wound body of the present invention, as shown in FIG.
As a result, when the electronic component series 1 is unwound and intermittently fed to the automatic mounting machine 4, it is possible to minimize lifting of the part near the start of the winding due to the winding curl, as shown by the dashed line, and the proket 3 and Since they mesh and are regularly fed intermittently, reliability is greatly improved.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the wound body of the present invention, Fig. 2 is a sectional view taken along the line - - of Fig. 1, Fig. 3,
4 and 5 are front views showing attachments in different embodiments, FIGS. 6 and 7 are perspective views showing electronic component series in different embodiments, and FIG.
The figure is a side view of a conventional example, FIG. 9 is a cross-sectional view taken along the line -- in FIG. 8, and FIG.
FIG. 11 is a sectional view of a conventional example in which a short series of electronic components is wound. 1...Electronic parts series, 11...Electronic parts, 13...
... Holding body, 2 ... Reel, 21 ... Winding core, 5 ...
attachment.

Claims (1)

[Scope of utility model registration request] An electronic component series, characterized in that an attachment having a predetermined thickness is attached to the outer periphery of the winding core in a wound body in which an electronic component series holding a large number of electronic components is wound around a band-shaped holding body. Rolled body.