JPS6321484B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a hook and loop fastener in which hooks and loops are erected on a base fabric.

A male side fastener with a large number of hooks having engaging parts erected on a base fabric, or a female side fastener with a large number of engaged elements (loops) with an engaged part erected on a base fabric. In the invention, the engaging element and the engaged element are generally manufactured by first weaving a monofilament as a warp when weaving a base fabric, and forming an engaged element using the monofilament to form a long and wide piece. Then, as shown in FIG. 1, in the case of female side fasteners, the areas where square, triangular, animal-shaped surface fasteners are used, etc. of the long and wide surface fastener band 1, The engaging element was formed by cutting out the cutout parts 2 and 3 in an arbitrary shape range depending on the usage condition, or in the case of a male side fastener, by cutting one leg of the engaged element of the surface fastener material 1. Thereafter, the surface fastener band 1 is manufactured by cutting out a cutout portion having an arbitrary shape, similarly to the female side fastener.

However, in conventional hook-and-loop fasteners manufactured in this way, the engaging elements are present over the entire surface of the base fabric, making it difficult to sew the hook-and-loop fastener to the adherend. When sewn onto an article, the engaging element is bent down by the sewing thread and protrudes from the edge of the hook-and-loop fastener, resulting in an unsightly appearance. Therefore, as shown in Utility Model No. 54-54404, the entanglement needles that are planted on the entire surface of one side of the base fabric are removed, leaving only some areas, and the entanglement needles in those areas are removed using a high-frequency welder, etc. It is known to be formed as a smooth part that is pressed onto a base fabric by heating and pressurizing and welded. However, with this method, the base fabric is cut in the first step, and in the next step, a part of the entangled needles is pressed onto the base fabric using heat and pressure to form a welded smooth part, so for example, the periphery of the base fabric When welding parts, there are two steps: cutting and welding using heat and pressure.
The work time increases and the work becomes complicated. In addition, when the base fabric has a complicated shape, cutting and welding by heating and pressurizing it is very troublesome, and there is a problem that the workability is poor.

SUMMARY OF THE INVENTION An object of the present invention is to provide a manufacturing method that can easily produce a hook-and-loop fastener in which the engaging elements do not protrude from the peripheral edge when sewn onto an object.

According to the present invention, when cutting out a predetermined shape range from a long and wide surface fastener band to make a surface fastener, a laser beam is focused at a focal position by a convex lens, and a laser beam is focused at a focal position by a convex lens, and a laser beam is focused at a position deviating from this focal position. By arranging the hook-and-loop fastener strip, irradiating it with a laser beam at an angle, and cutting it, the peripheral edge of the base fabric can be made into a border where no engaging elements are present.

The present invention will be described below based on embodiments shown in the drawings.

In FIG. 2, reference numeral 10 denotes a male side fastener in which the other engaging element 12 is erected on one side of the base fabric 11;
Reference numeral 13 indicates a large number of engaged elements 15 on one surface of the base fabric 14.
This is a female side fastener with an upright structure. The peripheral edge portions of the double-sided fasteners 10 and 13 are flat edged portions 16 and 17 in which the engaging element 12 and the engaged element 15 are not present. In the illustrated example, each engaging element 11 is erected one by one, whereas a plurality of engaged elements 15 are erected in groups.

These hook-and-loop fasteners 10 and 13
Since there are no engaging elements in 6 and 17, the border 1
6, 17, it can be sewn to the adherend;
The sewing work becomes easier, and the engaging element does not protrude from the edge of the hook-and-loop fastener, giving it a good appearance.

Such surface fasteners 10 and 13 are made of a long and wide surface with a large number of engaged members 15 erected on one surface of a base fabric 14, as shown in FIG. When cutting a product with a predetermined shape from the fastener strip 1 to make a surface fastener, the laser beam 20 is focused on a focal point 22 by a convex lens 21, and the surface fastener strip 1 is cut with the engaged element 15 on the lower side. , the surface fastener strip 1 and the laser beam source side are relatively moved and cut while being positioned below the focus position 22, so that the laser beam is irradiated at an angle;
It is possible to produce hook-and-loop fasteners with edges 16, 17 in which there are no cutting and engagement elements. Further, as shown in FIG. 4, the hook-and-loop fastener strip 1 and the laser beam source side are relatively moved with the engaged element 15 facing upward and positioned above the focal point 22 of the convex lens 21. It can also be manufactured by cutting.

Of the surface fasteners cut out from the surface fastener strip 1 as shown in FIGS. 3 and 4, the male side fastener 10 is located at the portion irradiated with the laser beam, as shown in FIGS. 5 and 6. The engaging element evaporates and disappears, and although a part 18 of the engaging element near the area irradiated with the laser beam remains, most of it melts and solidifies together with the base fabric 11, leaving a flat edged portion 16 on the periphery where no engaging element exists. It is formed in the part.
Similarly, in the case of the female side fastener 13, as shown in FIGS. 7 and 8, the engaged elements in the part irradiated with the laser beam evaporate and disappear, and the engaged elements in the vicinity of the part irradiated with the laser beam evaporate and disappear. Although a portion 19 of the interlocking element remains, most of it is melted and solidified together with the base fabric 14, so that a flat bordered portion 17 in which no engaged elements are present is formed on the periphery.

If a predetermined area of the hook-and-loop fastener strip 1 is cut out as shown in FIGS. 3 and 4, the cutting operation and the edging portion 1 where no engaging element is present on the periphery are completed.
6 and 17 can be performed at the same time, and a surface fastener having the edge portions 16 and 17 on the periphery can be easily manufactured.

As described above, since the surface fastener of the present invention has a peripheral portion that is a bordered portion where no engaging element is present,
It is easy to sew to the object, and the engaging element does not protrude from the edge even when it is sewn to the object, giving it a good appearance.

Further, according to the manufacturing method of the present invention, when cutting a predetermined shape range from a surface fastener band to produce a surface fastener, the laser beam is focused at a focal position by a convex lens, and a surface Since the fastener strip is placed and cut by irradiating it with a laser beam at an angle, the cutting operation and the operation of forming a border where no engaging element is present on the peripheral edge can be performed at the same time, that is, in one step. Therefore, it is possible to easily manufacture a hook-and-loop fastener having the edge portion on the peripheral edge.

Furthermore, there is an effect that even when obtaining a surface fastener with a complicated shape, it can be easily handled.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a state in which a hook-and-loop fastener is cut from a hook-and-loop fastener strip, FIG. 2 is a perspective view showing an embodiment of the hook-and-loop fastener according to the present invention, and FIG. 3 is an implementation of the manufacturing method according to the present invention. FIG. 4 is an explanatory diagram of an embodiment of another manufacturing method, FIG. 5 is a front view showing a part of the male side fastener manufactured by the manufacturing method of the present invention, and FIG. 7 is a front view showing a part of the female side fastener manufactured by the manufacturing method of the present invention, and FIG.
The figure is a plan view of FIG. 7. 10: Male side fastener, 11, 14: Base fabric,
12: Engagement element, 13: Female side fastener, 15:
Engaged element, 16, 17: border portion, 20: laser beam, 21: convex lens, 22: focal position.

Claims (1)

[Claims] 1. A method for producing a surface fastener in which a predetermined shape range is cut out from a continuous surface fastener band formed by erecting a large number of engaging elements on a base fabric, in which a laser beam is focused at a focal position using a convex lens. 1. A method for producing a surface fastener, comprising: arranging the surface fastener strip at a position away from the focused position, and cutting out a predetermined range of the surface fastener strip by irradiating a laser beam at an angle.