JP2003061713A - Cutting device for filament loop member for hook-and-loop fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for cutting a filament loop member for a hook-and-loop fastener, which can increase the reciprocating frequency of a movable blade to improve the processing speed, reduce noise and extend the life. . The cutting device includes a filament loop member (2).
6, a vibrator 4 having the blade 3 at its free end 4b, and an electromagnetic drive unit 5. Electromagnetic drive 5
Applies a magnetic force to the vibrator 4 to cause the vibrator 4 to vibrate, thereby causing the blade portion 3 to reciprocate and cut the filament loop member 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting device for cutting a filament loop member to make a hook-shaped engaging element for a surface fastener.

[0002]

2. Description of the Related Art A hook surface fastener having a large number of hook-shaped engaging elements on a base cloth is a loop surface fastener having a loop-shaped engaging element that engages with the hook-shaped engaging elements, or a long-haired fiber. It is widely used as a surface fastener that engages with non-woven fabrics. As an apparatus for efficiently manufacturing a hook surface fastener having such a complicated structure, a part of the side threads of a large number of filament loops woven on a base cloth is used as two movable blades and two movable blades. A hook-shaped engaging element that is cut off with a fixed blade installed in between is disclosed in Japanese Patent Publication No. 42-13511 and Japanese Patent Laid-Open No. 62-1.
It is disclosed in Japanese Patent No. 37003. In these manufacturing devices, as a drive device for linearly reciprocating the movable blade, a device that converts the rotational force of a motor into a linear reciprocating motion by a conversion mechanism using a crank or an offset shaft is used. .

[0003]

However, in the case of using such a conversion mechanism, the frequency of reciprocating motion is limited, it is difficult to give motion of high frequency to the movable blade, and the cutting efficiency is high. It does not rise enough. Also, since multiple movable blades are connected to one drive unit, the size of the entire unit becomes large and the weight becomes excessive, which causes problems of noise and vibration, and also requires a lot of labor for maintenance of the unit. Also has points.

The present invention has been made in view of the above circumstances, and the filament for a surface fastener is capable of increasing the reciprocating frequency of the movable blade to improve the processing speed, and reducing noise and extending the life. An object is to provide a cutting device for loop members.

[0005]

In order to achieve the above object, a filament loop member cutting device for a surface fastener according to the present invention has a blade portion for cutting the filament loop member, and the blade portion at a free end. The vibrator includes an oscillator and an electromagnetic driver that causes the blade to reciprocate by applying a magnetic force to the oscillator to vibrate the filament loop member.

According to the above cutting device, a magnetic force is applied to an oscillator by an electromagnetic drive unit to cause the oscillator to vibrate, and a blade portion provided at a free end of the oscillator reciprocates to cut the filament loop member. Since the driving force conversion mechanism is not required, the reciprocating frequency of the blade can be increased, the cutting processing speed can be improved, and the entire device can be downsized to reduce noise and the device. The life of can be extended.

In a preferred embodiment of the present invention,
A stroke limiting portion is provided between the free end and the fixed end of the vibrator to add resistance to the vibration of the vibrator to limit the stroke of the reciprocating motion of the blade. Thus, by limiting the stroke of the reciprocating motion of the blade portion by the stroke limiting portion, it is possible to regulate the movement of the blade portion such that the blade portion contacts the adjacent filament loop member that should not be cut, Can be cut easily.

In a preferred embodiment of the present invention,
It is provided with a frequency converter that converts the power supply power to a predetermined frequency and supplies the power to the electromagnetic drive unit. With this configuration, the frequency of the reciprocating motion of the blade can be easily changed, and the cutting process mode can be freely selected.

In a preferred embodiment of the present invention, the blade portion has upper and lower two movable blades and one fixed blade installed between the two movable blades, and The fixed blade enters into and the filament loop member is partially cut off by the vibration of the movable blade. With this configuration, the filament loop member can be partially cut off to reliably form the hook-shaped engaging element.

In a preferred embodiment of the present invention, the blade portion is provided with one movable blade and one movable blade in contact with the movable blade.
It has a fixed blade of one sheet, and the fixed blade enters into the filament loop member, and is configured to cut the filament loop member by the vibration of the movable blade. With such a configuration, by cutting at one location of the filament loop member, the filament loop member is displaced at the cutting location, and the loop-shaped shape can be made into a hook-shaped engaging element.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view showing a schematic configuration of a device for cutting a filament loop member for a surface fastener, which is an embodiment of the present invention. This cutting device
A plurality of sets of cutting units 2 are installed side by side on a base 1 at predetermined intervals. FIG. 2 shows a front view of one of the cutting units 2. This cutting unit 2
Blade part 3 for cutting the filament loop member, and vibrator 4
And an electromagnetic drive unit 5.

As shown in the exploded perspective view of FIG. 3, the blade portion 3 has two movable blades 6A and 6B arranged horizontally, which are arranged horizontally.
It has one fixed blade 7 installed horizontally between these movable blades 6A and 6B. At one end of each of the movable blades 6A and 6B in FIG. A plurality of cutting edges 11 are also formed in a comb-like shape along the lateral direction 31 at one end of the fixed blade 7. The side-by-side pitch of these blade edges 10 and 11 is set according to the size and arrangement interval of the filament loop member to be cut. The fixed blade 7 is supported by the frame 9 via the support member 8 shown in FIG. The frame 9 is attached to the base 1.

The vibrator 4 shown in FIG. 2 is made of iron piece, ferrite, or various magnetic alloys, and its fixed end 4a is fixed to the lower portion of the frame 9. Further, the upper end, which is the free end 4b of the vibrator 4, has movable blades 6A,
It is inserted into the notches 12 and 12 provided in 6B and fixed to the movable blades 6A and 6B.

The electromagnetic drive unit 5 is composed of an electromagnet, and by applying a magnetic force to the vibrator 4 to vibrate it, the movable blades 6A and 6B of the blade unit 3 are reciprocated in the lateral direction 31 to form a filament loop member. To disconnect. A frequency converter 19 is connected to the electromagnetic drive unit 5. Frequency converter 19
Is a means for converting DC power supplied from a DC power supply (not shown) via the lead wire 21 into AC power having a desired frequency and energizing the electromagnetic drive unit 5. Electromagnetic drive unit 5
Repeats the generation and extinction of an electromagnetic field according to the supplied AC power, thereby repeatedly applying an attractive force to the vibrator 4. The electromagnetic drive unit 5 is installed in the upper half portion of the frame 9 at a position closer to the left than the middle portion of the vibrator 4.
The movable blades 6A, 6B are arranged in the direction in which the electromagnetic drive unit 5 and the vibrator 4 are arranged
Are aligned in the slide direction 31.

The free end 4b and the fixed end 4a of the vibrator 4 are also provided.
And more specifically, at a position closer to the fixed end 4a than the position where the vibrator 4 faces the electromagnetic drive unit 5, resistance is added to the vibration of the vibrator 4 to reciprocate the movable blades 6A and 6B. A stroke limiter 22 for limiting the stroke is provided. In this embodiment, the stroke limiting unit 22 is
The first compression coil spring 23A interposed between the left frame portion 9a of the frame 9 and the vibrator 4, and the right frame portion 9b of the frame 9
And second compression coil spring 23 interposed between the oscillator 4 and
It is composed of B and. As a result, when the oscillator 4 swings in either the left or right direction, a reaction force that suppresses the swing acts on the coil springs 23A and 23B, and the oscillator 4 swings, that is, the movable blades 6A and 6B reciprocate. Is regulated within a predetermined range. Here, the coil springs 23A and 23B also serve as members for returning the vibrator 4 released from the attraction force of the electromagnetic drive unit 5 to the original position.

The stroke limiting portion 22 is not limited to the coil springs 23A and 23B, but may be constituted by other well-known means, and the vibrator 4 may be a spring such as a rigid leaf spring. Large constant (large elastic restoring force)
If formed of a member, it can be omitted.

Next, the operation of the cutting device having the above construction will be described. Frequency converter 1 from DC power supply via lead wire 21
The DC power supplied to 9 is converted into AC power of a predetermined frequency by the frequency converter 19 and supplied to the electromagnetic drive unit 5. As a result, the electromagnetic driving unit 5 causes the vibrator 4 to operate at the frequency
In order to repeatedly suck, the free end 4b of the vibrator 4 with the movable blades 6A and 6B fixed oscillates left and right with the fixed end 4a as a fulcrum. The fixed end 4a of the vibrator 4
Since the swing range of the free end 4b is extremely small (0.7 to 1.0 mm) as compared with the length from the end to the free end 4b, this swing causes the movable blades 6A and 6B to substantially linearly reciprocate. .

When the fixed blade 7 of the blade portion 3 is inserted into the filament loop member 26 on the base cloth 25 as shown in FIG. 4A, the movable blades 6A and 6B are operated as described above. As shown in FIG. 4B, the upper and lower movable blades 6A,
By the reciprocating movement of 6B, a part of the side yarn 26a of the filament loop member 26 is cut off, and the filament loop member 2
As shown in FIG. 4C, 6 is a hook engaging element 27 having a hook-shaped tip.

In the above embodiment, the blade portion 3 is composed of the fixed blade 7 and the upper and lower movable blades 6A and 6B. However, the present invention is not limited to this, and the fixed blade 7 and one movable blade (for example, the upper movable blade). Blade 6A)
You may comprise. In this case, as shown in FIG. 5 (A), when the movable blade 6A is operated as described above in a state where the fixed blade 7 is inserted into the filament loop member 26,
As shown in (B), the side thread 26a of the filament loop member 26 is cut by the movable blade 6A. As a result, in the state where the cut portion of the side thread 26a is displaced as shown in FIG. 5 (C),
The filament loop member 26 becomes a hook engaging element 27A having a hook-shaped tip.

Further, when two movable blades are provided on the blade portion, the fixed blade can be omitted. In that case, the side thread of the filament loop member is cut by the relative reciprocal movement of the upper and lower movable blades in the lateral direction, and a hook with a hook-shaped tip similar to that shown in FIG. Engaging element 2
7A is obtained.

Thus, in this cutting device, the movable blades 6A, 6 of the blade portion 3 for cutting the filament loop member 26 are cut.
The movable blade 6 is moved by vibrating the vibrator 4 having B at its free end by applying a magnetic force from the electromagnetic drive unit 5.
A and 6B are reciprocated to move the filament loop member 2
Since 6 is cut, the conversion mechanism of the driving force is unnecessary, so that the reciprocating frequency of the movable blades 6A and 6B can be increased, the cutting processing speed can be improved, and the entire device can be improved. Can be downsized, noise can be reduced, and device life can be extended.

Further, in this embodiment, a stroke is added between the free end 4b and the fixed end 4a of the vibrator 3 to add resistance to the vibration of the vibrator 4 to limit the stroke of the reciprocating motion of the movable blades 6A and 6B. Since the restriction portion 22 is provided, the movable blade 6A,
It is possible to regulate the movement of the movable parts 6A and 6B such that the 6B comes into contact with each other, and an accurate cutting process can be performed.

Further, in this embodiment, since the frequency converter 19 for converting the power source power into a predetermined frequency and supplying it to the electromagnetic drive unit 5 is provided, the frequency of the reciprocating motion of the movable blades 6A and 6B can be easily adjusted. Can be changed to, and the cutting mode can be freely selected. In addition, since the number of moving members in each part of the device is small and the weight can be reduced, it is easy to increase the frequency.

[0024]

As described above, according to the filament loop member cutting device for a surface fastener of the present invention, the blade portion for cutting the filament loop member, the vibrator having the blade portion at its free end, and the vibration Since it is provided with an electromagnetic drive section that reciprocates the blade section by applying a magnetic force to the child to vibrate and cuts the filament loop member, the reciprocating frequency of the blade section can be increased, The cutting processing speed can be improved, the entire device can be downsized, noise can be reduced, and the life of the device can be extended.

[Brief description of drawings]

FIG. 1 is a plan view showing a schematic configuration of a filament loop member cutting device for a surface fastener according to an embodiment of the present invention.

FIG. 2 is a front view of one cutting unit constituting the cutting device.

FIG. 3 is an exploded perspective view of a blade portion of the cutting device.

FIG. 4 is a front view showing a cutting operation of the cutting device.

FIG. 5 is a front view showing a cutting operation when the number of movable blades in the blade portion is one.

[Explanation of symbols]

2 ... Cutting unit, 3 ... Blade part, 4 ... Oscillator, 4a ... Fixed end (base end), 4b ... Free end, 5 ... Electromagnetic drive part, 6A, 6
B ... Movable blade, 7 ... Fixed blade, 19 ... Frequency converter, 22 ...
Stroke limiting part, 26 ... Filament loop member

Claims (5)

[Claims] 1. A blade portion for cutting a filament loop member, a vibrator having the blade portion at a free end, and a reciprocating motion of the blade portion by vibrating by applying a magnetic force to the vibrator. A filament loop member cutting device for a surface fastener, comprising: an electromagnetic drive unit for cutting the filament loop member. 2. The stroke limiting section according to claim 1, further comprising a resistance between vibration of the vibrator and a stroke limiter for limiting the reciprocating stroke of the blade between the free end and the fixed end of the vibrator. A device for cutting a filament loop member for hook-and-loop fasteners provided. 3. The device for cutting a filament loop member for a surface fastener according to claim 1, further comprising a frequency converter that converts power supply power into a predetermined frequency and supplies the power to the electromagnetic drive unit. 4. The blade portion according to claim 1, wherein the blade portion has two movable blades, an upper and a lower movable blade, and a fixed blade, which is installed between the two movable blades. A device for cutting a filament loop member for a surface fastener, wherein the fixed blade enters the filament loop member, and the filament loop member is partially cut off by vibration of the movable blade. 5. The filament loop member according to claim 1, wherein the blade portion has one movable blade and one fixed blade provided in contact with the movable blade. A cutting device for a filament loop member for a surface fastener, wherein the fixed blade enters into the inside and the filament loop member is cut by vibration of the movable blade.