JPS604406Y2 - band - Google Patents

Description

[Detailed description of the invention] This invention relates to the structure of bands such as watch bands and waist belts made of natural leather or synthetic leather.

As is well known, in the case of leather watch bands, in order to prevent the cut surface of the raw leather for the outer skin from being exposed on the edges of the product and spoiling the aesthetics, especially the sense of luxury, it is necessary to A piece of raw hide for the outer skin is cut out to a larger size, and the peripheral part of the cut out raw skin is folded back to the back side to form the outer skin part. The cut surface of the raw skin for the outer skin is concealed by pasting a backing skin on it.

The creator of this idea has already published Japanese Patent Application No. 55-42663 (Japanese Patent Publication No. 58-523) as a manufacturing method of a band using one hem-back method for concealing the cut surface of raw hide as mentioned above.
As shown in FIG. 1, a filler material 2 such as a non-woven fabric is filled in the folded peripheral part of the skin raw skin 1, that is, between the folded parts 1 and 1a, and then ground with a grinder or the like from the back side. to make the surfaces of the folded parts 1a, la' flush with the surface of the filler 2, and also to make the folded parts 1a, la'
A method is proposed in which the grain layer on the surface of the ' is removed and the epidermis 5 is then attached.

According to this method, the folded parts 1a, la' made of raw hide
Since the grain layer on the surface of the raw skin 1 is removed, the adhesive force when pasting the back skin 5 is increased, and the effect of preventing the back skin 5 from peeling off is obtained. la'
The surface of the filler material 2 is flush with the surface of the filler material 2, so there is no difference in level between the folded portions 1a, la' and the filler material 2 on the extremely thin backing 5, and the appearance is also good. Effects such as this can be obtained.

However, when we repeated experiments on the above-mentioned method, we found that depending on the material of the filler 2, even if the polishing process was performed as described above, the band of the final product would have the filler 2 and the folded part 1a as shown in Figure 2. , la', and it has been found that unevenness may occur on the lining 5 due to a difference in level.

That is, after performing the grinding process and attaching the backing 5 as described above, the band is inserted into a female die and the backing 5 is attached in order to strengthen the adhesive force and shape the entire band. Normally, pressing is performed with a male mold from the side of the filler 2, but depending on the material of the filler 2, the amount of elastic recovery of the filler 2 and the raw skin 1 (folded parts 1a, la') when the press pressure is removed may vary. As a result, there is a difference between the filler and the folded part 1 before pressing.
Even if 1a and 1a' are flush, a step may occur between them after pressing, resulting in unevenness on the surface of the backing 5, and the amount of swelling due to the adhesive used to bond the backing 4. A difference in the amount of shrinkage of the adhesive or a difference in the amount of shrinkage of the adhesive when drying occurs between the folded portions 1, 1a/ of the raw skin 1 and the filler 2, resulting in a level difference in the same manner as described above, and unevenness is created on the surface of the backing skin 5. It turns out that sometimes.

The purpose of this invention is to provide a band that effectively solves the above problems.

In other words, the band of this invention has a configuration in which both widthwise edges of the folded raw leather for the outer skin are butted together and flush on the back side of the band, thereby eliminating the need for a filler and solving the above-mentioned problem. This is to prevent this from occurring.

Hereinafter, an embodiment of this invention will be explained in detail with reference to FIG. 3 and subsequent figures. FIG. Natural leathers such as leather, ostrich leather, and cowhide, synthetic leathers, and layered materials made by laminating natural leather and synthetic leather, nonwoven fabrics, etc., are used.

The peripheral portions of the raw hide 1 on both sides in the width direction are folded back to the back side to form folded parts 1a and 1a', and the tips 1b and lb' of the folded parts 1a and 1a' on both sides are butted against each other and the surfaces are a skin portion 6 is formed;
Ru.

Here, the tips 1b and lb' are not butted together when folding the periphery of the raw hide 1, but as shown in the example of the manufacturing method described later, the tips of the periphery of the raw hide 1 are slightly shaped, and after folding so that they match, The overlapping portions are removed by grinding with a grinder, bell sander, etc. to make them flush, so that they are visually flush.

Note that the above-mentioned grinding is performed until the grain layer on the surface of the folded portions 1a and 1a' is slightly removed.

Furthermore, a thin back skin part 7 is formed on the back surface of the skin part 6.

This back skin portion 7 may be formed by pasting a thin synthetic resin film, thin natural leather, synthetic leather, etc. with an adhesive, for example.

When a thermoplastic film capable of high-frequency dielectric heating such as a synthetic resin film is used for the backing part 7, it is desirable that the peripheral edge of the film be thinned by die-cutting using high-frequency pressure cutting. Further, depending on the case, the peripheral edge may be removed with a knife or the like to make it thinner.

FIG. 4 shows step-by-step the manufacturing method for the tip side part of a wrist watch band to which the above-mentioned embodiment is applied. First, as shown in FIG. The raw hide 1 is cut out to a size larger than the size of the original skin 1, and a groove 9 is formed at a position that will serve as a reference for folding.

That is, a groove 9 is formed at a position a predetermined distance inside from the periphery of the raw skin 1, substantially following the contour of the band to be the product.

In Fig. 4, reference numeral 10 indicates a main body periphery which is to become a folded part of the band main body portion IA, 11 indicates a parallel peripheral portion at a position corresponding to a shaft hole described later, and 12 indicates a portion extending toward the main body to form a shaft hole described later. The periphery of the folded proximal end portion IB, 13, is the periphery of the tip arc-shaped portion, and the tip periphery 13 is marked with ■
A plurality of shaped cuts 14 are formed, and ■-shaped cuts 15 and 16 are also formed between the main body peripheral part 10 and the parallel peripheral part 11 and between the parallel peripheral part 11 and the proximal peripheral part 12, respectively. ing.

Reference numeral 17 denotes a thin plate made of metal or the like for reinforcing the arcuate portion of the tip and facilitating folding back of the peripheral portion of the tip.

As shown in FIG. 4B, the raw hide 1 cut out as described above is first folded back and glued with the proximal peripheral part 12 and the parallel peripheral part 11 to the back side, and then the parallel peripheral part 11 is glued as shown in FIG. 4C. The base end portion 1B is folded back toward the main body portion IA side with respect to the axis P at the central position of the portion 11 to form the shaft hole 18, and then, as shown in the fourth diagram, the main body peripheral portions 10 and the distal peripheral portions on both left and right sides are folded back. 13 and glue them together so that their tips are slightly shaped.

Then, it is ground from the back side using a grinder or belt sander.

This grinding is performed by removing the overlapped parts of the folded main body peripheral part 10 and tip peripheral part 13 of the raw hide 1, that is, the folded parts la and 1a' (see Fig. 3), so that they are flush with each other, and the surface Continue until the surface layer is removed to some extent.

As a result, a skin portion 6 as shown in FIG. 4E is formed.

Thereafter, a synthetic resin film, thin natural leather, synthetic leather, or the like is adhered with an adhesive to form the back skin part 7.

After this, the entire band is pressed using a mold press for the purpose of shaping the overall shape of the band or increasing the adhesive strength of the backing.

At this time, a filler made of a different material is not inserted between the folded parts 1a and la' on both sides, and the folded parts 1 made of the same material
, 1 a/ are butted against each other, so even when press pressure is removed, there will be no difference in the amount of elastic recovery and no steps will occur, and there will be no difference in the amount of swelling caused by the adhesive or when the adhesive dries There is no difference in level caused by the difference in the amount of contraction, and therefore no unevenness or streaks are formed on the surface of the backing 5.

In addition, as shown in the fourth diagram, the peripheral parts 10 of the main body on both the left and right sides
After the tip peripheral portion 13 is folded and glued so that the tips slightly match each other, when grinding the overlapping portion with a grinder etc., since the raw leather is highly flexible, the grinding pressure of the grinder etc. The upper raw skin is pushed into the space at the corner of the tip of the lower raw skin in the overlapping part, and as a result, not only are the surfaces flush, but the tips of the folded parts 1a and 1a' are tightly spaced without any gaps. They are in contact with each other.

In other words, since the raw skin for the epidermis is highly elastic, it is difficult to accurately determine the folding position.Therefore, by simply folding the raw skin for the epidermis, it is difficult to butt the ends closely together without any gaps. If it is simply folded back, a gap is likely to occur between the ends of the folded part, and if such a gap occurs, part of the lining will be damaged by the press pressure during press processing for shaping after forming the lining. It falls into the gap and creates a linear (stripe) recess on the surface of the lining, but in the case of this invention, as described above, the folded part 1a
, 1a' are in close contact with each other without any gaps, so that it is possible to effectively prevent the formation of linear recesses on the surface of the backing after press working.

Note that if a filler is not used as described above, it may be difficult to smooth the back surface of the epidermis 6 near the proximal end or distal end of the band, and therefore it may be difficult to make the back surface of the epidermis 6 smooth in the vicinity of the base end or the distal end of the band. Filling materials may be used.

For example, as shown in FIG.
A filler 19 made of non-woven fabric or the like may be filled in a position adjacent to the proximal end of '.

As is clear from the above explanation, in the band of this invention, the ends of the folded parts on both sides in the width direction of the raw skin for the skin are butted together, so no filler is used at least in the butted parts, and therefore no filler is used. There is no difference in the amount of elastic recovery when pressure is removed or differences in the amount of swelling or contraction caused by the adhesive, and there is no difference in level in that part, and the tips of the folded parts are butted together in close contact without any gaps. As a result, there is no risk of any unevenness or streaks occurring on the surface of the lining portion, which may impair the appearance.

[Brief explanation of the drawing]

FIG. 1 is a cutaway perspective view of a band according to the prior art, FIG. 2 is a partially enlarged sectional view of the band according to the prior art, FIG. 3 is a cutaway perspective view of a band according to an embodiment of the invention, and FIGS.
E is a perspective view showing step-by-step an example of a method for manufacturing a band of this invention, and FIG. 5 is a perspective view of another embodiment of a band of this invention with the lining removed. 1... Raw hide, la, la'... Turned part, lb. 1b'... Tip of folded part, 6... Outer skin part, 7... Back skin part.

Claims (1)

[Scope of utility model registration request] By folding the peripheral parts on both sides in the width direction of the original skin for the skin so that their tips slightly match each other, and sanding off the overlapping parts, the tips of the folded parts are butted flush with each other without any gaps. A band having a skin part formed thereon, and a thin back skin part formed on the back surface of the skin part so as to cover the abutting part.