JPH019157Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is particularly designed to transport spools for winding fine metal wire.
This invention relates to a spool case suitable for storage.

A wire bonder is used to connect a semiconductor element and an external lead with an ultrafine metal wire such as Au or Al, and the ultrafine metal wire is wound around a spool of a certain standard and supplied to the wire bonder. A spool case as shown in FIGS. 1A and 1B has conventionally been used as a spool case for a spool wound with such a thin metal wire. FIG. 1A is a plan view of the entire spool case, and FIG. 1B is a sectional view taken along the line X--X in FIG. 1A. The spool case shown in FIGS. 1A and B consists of a container 1 and a lid 2. Both the container 1 and the lid 2 are vacuum-formed soft thermoplastic sheets. A gently inclined truncated cone 1a that fits with the inner surface of the spool 3 has a continuous protuberance 1b formed on its outer periphery so that the lid 2 can be fitted, and the lid 2 has an outwardly sloping peripheral wall 2a and a central part with the other end of the spool 3. Spool 3 by mating with the inner surface
It has an inner convex portion 2b that can hold the inner convex portion 2b. Figure 1A
The main reason why half of the lid 2 is semicircular and the other half is rectangular is that one hand holds the outer periphery of the bottom plate of the container 1, the other hand hangs on the lid 2, and the lid 2 is placed in the container 1.
This is to make the work of removing it easier.

However, such a spool case inevitably has a certain degree of variation in shape and size due to manufacturing, and has the disadvantage that the fitting of the spool 3 and the fitting of the lid 2 and the container 1 are not constant. For example, if the spool is fitted too tightly into the truncated cone 1a, extra force will be required when removing the spool 3, and the fine wire may be touched, or the fine wire wound around the spool 3 may be pulled out of the container 1 by force when removing the lid 2. The thin wire could be damaged by contacting the protuberances 1b, and if it was too loose, the spool 3 would move within the spool case due to vibration during transportation, causing the thin wire winding layer to collapse. Fitting of the protrusion 1b and the lid 2,
Similar problems arise with regard to the fitting between the spool 3 and the convex portion 2b of the lid 2. Furthermore, even if this spool case were manufactured as designed, the truncated cone 1a basically only fixes one end of the spool 3, and when the spool 3 is removed from the truncated cone 1a, the spool 3 is It is also possible to pull it out at an angle from the central axis of the stand 1a, but there is a risk that the fine metal wire (not shown) wound around the outside of the spool will come into contact with the protuberance 1b and be damaged. Furthermore, since this spool case is made of a plastic sheet with a thickness of about 0.1 mm, it is easily deformed and has the disadvantage that it cannot withstand repeated use.

The present invention aims to eliminate the above-mentioned drawbacks of conventional spool cases all at once, and to provide a spool case that has stable dimensional accuracy, can withstand repeated use, and further secures the spool retention.

To achieve this purpose, the spool case of the present invention consists of a container with a U-shaped cross section and a removable lid. A protrusion approximately equal to the height of the spool is provided so as to be inscribed inside the spool, and the height of the peripheral wall of the container is approximately one-fourth or more of the height of the spool. The distance between the inner bottom surface of the container and the inner bottom surface of the lid is substantially equal to the spool height.

2A, B and C show an embodiment of the spool case of the present invention. Figure 2 A shows a container 1 with a U-shaped cross section.
FIG. 2B is a sectional view taken along the line Y--Y in FIG. 2A, and FIG. 2C is a sectional view of the tray-shaped lid 2 that fits into the container 1.

In FIGS. 2A and 2B, the container 1 has a circumferential wall 4 having a cylindrical shape, and three protrusions 5 are provided perpendicularly to the center of the inner bottom surface of the container 1 symmetrically. Protrusion 5
are provided at approximately equal intervals so as to be inscribed on the inner surface of the spool 3 and to hold the spool. The height of the protrusion 5 needs to be approximately equal to the height of the spool 3. The reason for this is that the position where the spool 3 is pulled out is set higher than the peripheral wall 4 of the container 1, and the spool 3
This is to eliminate the possibility that a fine metal wire (not shown) wound around the peripheral wall 4 comes into contact with the end of the peripheral wall 4. The shape of the protrusions 5 is not limited to the three bar-like shapes shown in FIG. Any shape is acceptable as long as it is inscribed in .

The height of the peripheral wall 4 of the container 1 needs to be at least about one-fourth of the height of the spool 3 to be stored, since it is necessary to minimize the chance of contact with the spool 3 when removing the lid 2. Preferably, the height should be approximately the same as the height of the spool 3. The distance between the inner bottom surface of the lid 2 and the inner bottom surface of the container 1 is made substantially equal to the height of the spool 3 to prevent the spool 3 inserted inside from moving when the lid 2 is applied to the container 1. The method of attaching the lid 2 to the container 1 is not limited to the fitting method shown in FIGS. 2B and 2C, but may be any of various known attachment methods as long as it can be attached and removed.

The container 1 may be made of any material as long as it has appropriate strength. Furthermore, since it is better for the material of the protrusion 5 to have appropriate elasticity, plastic is suitable. When the container 1 and the protrusion 5 are made of plastic, they can also be integrally formed of the same plastic.

When the container 1 is made of a hard material and the protrusion 5 is made of a soft material, it is preferable to make the container 1 as shown in FIGS. 3A and 3B, for example. That is, FIG. 3A is a plan view of such a container 1, and FIG. 3B is a sectional view taken along the line Z--Z in FIG. 3A. In this embodiment, a support rod 8 is erected integrally with the container 1 at the center of the inner bottom surface of the container 1, and arms 7 of the same length extend in all directions at right angles from one end of a cylindrical portion 6 that fits around the outer periphery of the support rod 8. A protrusion 5 is formed extending from the outer end of the arm 7 in parallel with the cylindrical part 6 and on the same side as the cylindrical part 6.
is in contact with the inner bottom surface of the container 1, and the cylindrical portion 6 is fitted and fixed to the outer periphery of the support rod 8. In this way, even if the material of the container 1 lacks elasticity, the spool 3 can be held sufficiently.

Since the material of the lid 2 does not directly affect the spool retention, any material may be used, and the material does not need to be particularly strong.

Although both FIGS. 2 and 3 show that the peripheral walls of the container 1 and the lid 2 are cylindrical, there is no need to limit the shape to a cylindrical shape. There is no problem even if it is a polygon or a polygon having partial arcs, as long as there is a gap between the peripheral wall 4 and the spool 3 to the extent that it does not hinder the extraction of the spool 3. .

The spool case of the present invention is manufactured using a molding method, and the finished dimensional accuracy is significantly improved compared to conventional spool cases made by vacuum forming. When the container is made of plastic, it can be easily manufactured by injection molding, and considering that it can be used repeatedly, it is even more advantageous in terms of cost.

According to the present invention, the spool is supported from the inner surface by the protrusions at multiple points spaced apart and symmetrically arranged, so even if the fit is made a little tighter, it can be easily inserted and removed. be. In addition, since the length of this support protrusion is approximately equal to the spool height, when inserting and removing the spool from the protrusion, the spool will not tilt with respect to the center line of the container, so the thin wire wound around the spool will not be tilted. This prevents the thin wire from coming into contact with the peripheral wall of the container and damaging the fine wire, and the spool can be held stationary within the spool case even during transportation.

[Brief explanation of the drawing]

Figure 1A is a front view of a conventional spool case for a spool wound with fine metal wire, and Figure 1B is a
The X-ray cross-sectional view and FIG. 2 show the first embodiment of the spool case for the spool wrapped with fine metal wire according to the present invention, where A is a plan view of the container, B is a cross-sectional view of A along Y-Y line, and C is a cross-sectional view of A along Y-Y line. 3 is a sectional view of the lid, FIG. 3 is a second embodiment of a spool case for a spool wrapped with fine metal wire according to the present invention, A is a plan view of the container, and B is a sectional view taken along the Z-Z line of A. be. 1... container, 1a... truncated cone, 1b... bump,
2...Lid, 2a...Protrusion, 3...Spool, 4...
...Peripheral wall, 5...Protrusion, 6...Cylinder part, 7...Arm, 8
...Support rod.

Claims (1)

[Claims for Utility Model Registration] (1) Consisting of a container with a U-shaped cross section and a removable lid, the container has a cylindrical spool with an interval at least two symmetrical locations in the center of the bottom of the container. A protrusion approximately equal to the height of the spool is provided so as to be placed and inscribed therein, and the height of the peripheral wall of the container is approximately one-fourth or more of the height of the spool,
A spool case for a spool wound with fine metal wire, which is formed so that the distance between the inner bottom surface of the container and the inner bottom surface of the lid is substantially equal to the spool height when the lid is attached to the container. (2) The spool case according to claim (1) of the utility model registration claim, wherein the container is made of a hard material and the protrusion is made of a soft material.