JPH05293890A - Ultrasonic fusion-bonding device - Google Patents

Abstract

PURPOSE:To keep strength of a fusion bonded part constant by a ultrasonic fusion bonding by specific pressure by a method wherein thread-like synthetic resin like a nylon monofilament is in good workability fusion bonded to each other. CONSTITUTION:An elastic material 16 is fixed to a bottom surface part of a bearer 4 having a groove part 8 which is engaged with a nylon monofilament. When an ultrasonic fusion bonding horn 3 is pushed into the groove part 8 of the bearer 4 with the elastic material 16, positional shear of the nylon filament is dissolved, and always constant pressure is applied to each nylon monofilament engaged with the bearer 4. Deterioration in strength of the monofilament according to fluctuation in pressure can be prevented, and assured fusion bond operation will be able to be carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic fusing device for fusing a filamentous synthetic resin such as nylon monofilament by ultrasonic fusing, and more particularly to an ultrasonic fusing device suitable for making fishing gear.

[0002]

2. Description of the Related Art The fusion of synthetic resin by ultrasonic waves does not require an adhesive or a drying time, and the fusion time is short, so that the working efficiency thereof can be greatly improved. In addition, ultrasonic welding is used in various fields from industrial products to food packaging because the strength of the fused portion is high.

By the way, a thread-shaped synthetic resin such as nylon monofilament is used for a fishnet or a fishing line as an example of its application. As an apparatus for instantly fusing such a thread-like synthetic resin, the applicant of the present invention has previously proposed Japanese Patent Application No.
In the specification and drawings of No. 269177, a device is proposed in which a groove is formed in a part of a pedestal facing the ultrasonic vibrating portion, and a thread-like synthetic resin is engaged with the groove to perform ultrasonic welding. Then
Further, in the specification and drawings of Japanese Patent Application No. 2-217830, a device having a thread-like synthetic resin feeding mechanism and a cutting mechanism is proposed.

[0004]

However, when fusing nylon monofilaments to each other in each of the above-mentioned devices, it is desirable to press the horn against the nylon monofilament with a constant pressure, but the horn is manually moved to perform the pressing operation. In that case, the pressure is not constant but varies. This is because the pedestal is fixed and the pressure during the pressing operation is directly applied to the nylon monofilament. As a result, if the pressure is too weak, the fused surface becomes smaller and the strength becomes weaker. On the contrary, if the pressure is too strong, the fused portion is deformed.

Furthermore, since the diameters of nylon monofilaments and the like are not constant, the center position of each fused nylon monofilament may be displaced with respect to the moving direction of the horn, resulting in poor adhesion of the horn tip. As a result, there arises a problem that a good fusion state cannot be obtained.

In view of the above technical problems, the present invention provides an ultrasonic device having a structure capable of eliminating the positional deviation of the thread-shaped synthetic resin and further fusing at a predetermined pressure. With the goal.

[0007]

In order to achieve the above object, an ultrasonic fusing device according to the present invention comprises an ultrasonic fusing horn having a groove for engaging a thread-shaped synthetic resin at its tip, The sonic welding horn is movably attached to the base, and the pedestal is attached to the base and has a groove portion into which the tip of the ultrasonic welding horn is inserted. The pedestal is an elastic body. It is supported by.

[0008]

In the ultrasonic fusing device according to the present invention, the pedestal is urged in the moving direction of the horn by the elastic body, and when the ultrasonic fusing horn is pushed into the groove portion of the pedestal, it is elastic. The elasticity of the body is added to the thread-shaped synthetic resin engaged in the groove, and at the same time, the thread-shaped synthetic resin is not pressed beyond its elastic force. Therefore, even if the ultrasonic fusing horn is manually operated, the pressure of the horn is not directly applied to the filamentous synthetic resin, and the fusing work is performed at a constant pressure.

Further, since the pedestal is elastically deformed in the in-plane direction by the elastic body, the positional deviation of the fused nylon monofilaments with respect to the moving direction of the horn is eliminated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described with reference to the drawings.

[Schematic Structure of Entire Device] The ultrasonic welding device of the present invention is a device for ultrasonically welding a filamentous synthetic resin such as a nylon monofilament, and is particularly useful for tackling fishing tackle and making or repairing fishing nets. It is suitable for use.

As shown in FIG. 1, an ultrasonic welding apparatus 1 of this embodiment has a pedestal 4 as will be described later on a substantially plate-shaped base 2.
The ultrasonic fusing horn 3 is provided so as to face the pedestal 4. A groove 8 is provided in the anvil 12 of the pedestal 4, and the tip 9 of the ultrasonic welding horn 3 is inserted into the groove 8. The ultrasonic welding horn 3 is supported by a supporting arm 6, and the ultrasonic welding horn 3 is operated by operating a hand lever 13 to move the arm holding member 5.
It is also movable along the axis 20.

[Structure of Ultrasonic Fusing Horn] The ultrasonic fusing horn 3 is a means for generating ultrasonic vibration having a vibrator 7 built therein. The ultrasonic vibration of the ultrasonic fusing horn 3 is converted into a nylon monofilament. It is transmitted and ultrasonic fusion is performed.
A groove 9 is formed in the tapered tip portion 21. The groove 9 is provided along the longitudinal direction when the nylon monofilament is engaged, and further has a recess corresponding to the circumferential surface of the cylinder of the nylon monofilament. Since the groove 9 is provided, the nylon monofilament is fused while being surely engaged with the groove 9. The length of the groove 9 in the longitudinal direction of the nylon monofilament corresponds to the length to be fused. The ultrasonic welding horn 3 is supported by the support arm 6, and the mounting position of the ultrasonic welding horn 3 on the support arm 6 can be adjusted by a screw or the like (not shown). An electric cord 19 for giving a high frequency signal is connected to the vibrator 7. This electric cord 19
Is connected to an oscillator (not shown), and a high frequency signal generated by the oscillator is supplied to the vibrator 7 via the electric cord 19.

The support arm 6 is integrated with the arm holding member 5, and the arm holding member 5 is hollow and movable in the longitudinal direction of a round rod-shaped shaft 20 penetrating the hollow portion. Therefore, the ultrasonic welding horn 3 supported by the support arm 6 can also move in the longitudinal direction of the shaft 20. A coil spring 22 that winds around a part of the peripheral surface of the shaft 20 is provided around the shaft 20.
Of the coil spring 22 is attached to the inside of the arm holding member 5. The hand lever 13 has a rotation fulcrum at the end opposite to the grip side, and the hand lever 13 moves the arm holding member 5 in the longitudinal direction of the shaft 20 by using the principle of leverage. When the hand lever 13 is pushed down, the arm holding member 5 is also pushed down. At this time, the coil spring 22 contracts and its elastic force increases. By pushing down the arm holding member 5, the tip 21 of the ultrasonic fusion horn 3 is inserted into the groove 8 of the pedestal 4. When the hand lever 13 is opened, the elastic force of the coil spring 22 causes the arm holding member 5 to move to the shaft 20.
It will move along and return to its original position. The ultrasonic fusing horn 3 is set so as to oscillate for a certain period of time under the control of a timer when a predetermined pressure is applied to the tip 21, and a limit switch is provided on the arm holding member 5. It is provided and is set so that oscillation is stopped when too much pressure is applied to the tip portion 21.

[Structure of the pedestal] The pedestal 4 is mounted on the base 2 via the elastic body 16 made of a resin material or the like, and the elastic body 16 causes the pedestal 4 to receive the nylon monofilament. Is movable in the vertical direction (moving direction of the horn 3) and in the horizontal direction (in-plane direction orthogonal to the moving direction) with respect to the main surface of the base 2.

The pedestal 4 is composed mainly of a metal anvil 12 and a table 14 made of an acrylic plate or the like, and an elastic body 16 has a double-sided adhesive tape or the like on the bottom surface of the table 14. It is fixed by adhesion.
A bed 15 is adhesively fixed to the bottom surface of the elastic body 16. By fixing the bed 15 to the base 2 by a method such as screwing, the receiving base 4 can be attached to the base 2. Has been done.

As the elastic body 16, any elastic material such as polyurethane, foamed polyurethane and various rubbers can be used.

The anvil 12 is fixed to the upper surface of the table 14 elastically held by the elastic body 16.
Therefore, the anvil 12 is also indirectly elastically held by the elastic body 16. The position of the anvil 12 is a position facing the ultrasonic fusion horn 3. The side shape of the anvil 12 is convex, and the groove 8 corresponding to the tip 21 of the ultrasonic fusion horn 3 is formed. Groove 8
Is for engaging the nylon monofilament during ultrasonic fusion, and has a width approximately equal to the size of the distal end portion 21 in the longitudinal direction of the nylon monofilament. The depth of the groove portion 8 is such a depth that the tip portion 21 can be inserted during fusion bonding, and the shape of the bottom portion of the groove portion 8 is V-shaped. In this way, by making the shape of the bottom of the groove 8 V-shaped, ultrasonic fusion can be performed even for nylon monofilaments having different diameters.

At this time, the heights of the upper end portions 10 and 11 of the groove portion 8 may be different from each other in consideration of workability and the like. That is, the upper end portions 10 and 11 facing each other with the groove portion 8 interposed therebetween are
A step is formed in the groove portion 8, and among the upper end portions 10 and 11, the height of the upper end portion 11 on the front side from the operator is reduced and the height of the upper end portion 10 on the rear side is increased. By providing such a step, when the nylon monofilament is engaged during fusion bonding, the nylon monofilament can be easily inserted into the groove portion 8 by moving the nylon monofilament to the height of the step. Work efficiency is greatly improved.

[Ultrasonic Fusion Work] Next, the ultrasonic fusion work will be described with reference to FIGS. 2 to 4.

First, when the hand lever 13 shown in FIG. 1 is in the non-operated state, the ultrasonic fusing horn 3 is supported at a position apart from the pedestal 4, as shown in FIG. The elastic body 16 of the pedestal 4 pushes up the table 14, so that the anvil 12 is also held at a high position.

From the initial state, when the nylon monofilament 30 is ultrasonically fused, the nylon monofilament 30 is engaged with the groove 8 of the pedestal 4. That is, this engagement work starts with the nylon monofilament 3
It is performed by moving 0 along the upper end 11 on the lower side, and when the nylon monofilament 30 hits a step with the upper end 10 on the higher side, the nylon monofilament 30 is pulled downward. Then, the nylon monofilament 30 falls into the groove portion 8 and the nylon monofilament 30 can be easily inserted into the groove portion 8. In the same way, the other nylon monofilament 3
1 is also engaged in the groove 8 of the anvil 12.

A pair of nylon monofilaments 30, 3
After engaging 1 in the groove 8, the hand lever 13 is rotated. By the rotation operation of the hand lever 13, the arm holding member 5 is moved along the shaft 20 into the coil spring 2
The ultrasonic fusing horn 3 is also lowered toward the pedestal 4 by this lowering operation while being lowered against the elastic force of 2. Further, when the hand lever 13 is pushed in, the peripheral surface of the nylon monofilament 31 comes into contact with the groove 9 of the tip portion 21 of the horn, and the pressing causes the nylon monofilament 31 and the nylon monofilament 30 to come into contact with each other as shown in FIG. Become.

Further, when the hand lever 13 is rotated, the tip portion 21 of the horn further pushes the nylon monofilament 31 toward the bottom side, and the nylon monofilament 30 abuts on the V-shaped bottom portion of the groove portion 8. At this time,
Since the bottom of the groove 8 is V-shaped, the nylon monofilament 31 having a substantially circular cross section is pushed into the center of the groove 8, and at the same time, the groove 9 provided in the tip 21 of the horn also has the nylon monofilament 31. Push to the center position. As a result, on the descending line of the ultrasonic welding horn 3,
The axes of the nylon monofilaments 30 and 31 are aligned, and the fusion work can be efficiently performed.

In this state, when the tip portion 21 of the horn is further lowered, the nylon monofilament 30 has the groove portion 8
Push down on the bottom of the. At this time, since the nylon monofilaments 30 and 31 are thin and have variations in diameter, the arrangement of the nylon monofilaments 31 and 30 is in the moving direction of the horn, that is, the center position of the groove 8 of the pedestal 4 and the tip of the horn. The axial direction A defined by the center position of the groove 9 of 21 may be a direction B deviated from the axial direction A. For example, as shown in FIG. 4, nylon monofilament 3
0 and 31 are the nylon monofilaments 30 and 31
The axis connecting the centers of the two is positioned with a certain inclination θ with respect to the moving direction of the horn. At this time, since the pedestal 4 is elastically displaceable in the in-plane direction by the elastic body 16, the deviation is quickly eliminated, and the nylon monofilaments 30 and 31 are arranged in the axial direction A. When the tip portion 21 of the horn 3 is further pushed down in this state, a predetermined pressure is applied to the nylon monofilaments 30 and 31, but the force applied at this time is only the drag force of the anvil 12 at the bottom of the groove portion 8, and this drag force is Because of the elastic force of the elastic body 16, a constant pressure is applied to the nylon monofilaments 30 and 31 regardless of the amount of force applied to the hand lever 13.

When the nylon monofilaments 30 and 31 are pressurized with such a predetermined pressure, oscillation is automatically turned on, a high frequency signal is sent to the vibrator 7, ultrasonic vibration is generated, and ultrasonic fusion is performed. The vibration is transmitted from the horn 3 to each of the nylon monofilaments 30 and 31 for instant fusion. The ultrasonic welding time is, for example, about 0.5 seconds, which is excellent in workability and ensures reliable welding. The on / off control of the oscillator is controlled by the hand lever 13
It is also possible to automatically operate by interlocking with the rotation of the horn or the position of the horn 3 or the anvil 12.

By using the ultrasonic welding apparatus of this embodiment, even if the operator's operation of the hand lever 13 varies, the ultrasonic welding is performed under a constant pressure. As a result, reliable fusion work will be performed. Moreover, since the upper end portions 10 and 11 having steps are formed in the groove portion 8, the nylon monofilaments 30 and 3 can be easily formed.
1 can be engaged, and high-efficiency work can be performed together with instant fusion.

In the present embodiment, the nylon monofilament is engaged with the groove portion 8 by the operator, but it is possible to provide a mechanism portion for applying tension to the engaged nylon monofilament.

[0029]

As described above, in the ultrasonic fusing device of the present invention, the groove portion of the pedestal into which the tip portion of the ultrasonic fusing horn is inserted is movable. The elastic body on the bottom surface elastically deforms against the movable pressure. Therefore, at the time of ultrasonic fusion, the filamentous synthetic resin is pressed at a constant pressure by the drag force of the elastic body, and reliable fusion can be performed regardless of the force of the operator. Further, since the elastic body can be elastically deformed against the in-plane movement of the pedestal, the positional deviation of the fused nylon monofilaments with respect to the moving direction of the horn can be eliminated, and more reliable fusion work can be realized. To do.

[0030]

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of an ultrasonic welding device of the present invention.

FIG. 2 is a side view of a horn and a pedestal of an ultrasonic welding apparatus according to an embodiment of the present invention when a nylon monofilament is engaged.

FIG. 3 is a side view of a horn and a pedestal of an ultrasonic welding apparatus according to an embodiment of the present invention when the horn and a nylon monofilament are in contact with each other.

FIG. 4 is a side view of a main part when the horn of the ultrasonic welding apparatus according to the embodiment of the present invention and the horn of the pedestal press the nylon monofilament.

[Explanation of symbols]

 1 ・ ・ ・ Ultrasonic welding device 2 ・ ・ ・ Base 3 ・ ・ ・ ・ ・ Ultrasonic welding horn 4 ・ ・ ・ Receiving base 8 ・ ・ ・ ・ ・ Groove 9 ・ ・ ・・ Grooves 10, 11 ・ ・ ・ ・ ・ Upper end 12 ・ ・ ・ ・ ・ Anvil 13 ・ ・ ・ Hand lever 14 ・ ・ ・ ・ ・ Table 15 ・ ・ ・ ・ ・ Bed 16 ・ ・ ・ ・ ・ Elastic body 21・ ・ ・ Tip 22 ・ ・ ・ ・ ・ Coil spring 30, 31 ・ ・ ・ ・ ・ Nylon monofilament

Claims (1)

[Claims] 1. An ultrasonic fusing horn having a groove for engaging a thread-shaped synthetic resin at its tip, a base on which the ultrasonic fusing horn is movably mounted, and an ultrasonic wave mounted on the base. An ultrasonic fusing device comprising: a pedestal having a groove into which the tip of the fusion horn is inserted, the pedestal being supported by an elastic body.