JP2995499B2 - Ultrasonic bonding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic bonding apparatus used for manufacturing a bag or the like by irradiating an ultrasonic wave to a superimposed packaging material to bond the packaging material.

[0002]

2. Description of the Related Art In forming a bag from a packaging material such as a sheet or a papermaking sheet in which synthetic resin yarns are knitted in a mesh shape, an ultrasonic wave is applied to the overlapping packaging material to cause intramolecular vibration. An ultrasonic bonding apparatus is used to generate heat and generate heat to melt and bond.

FIG. 6 is a plan view showing a conventional ultrasonic bonding apparatus disclosed in Japanese Patent Application Laid-Open No. 62-120040.
Parallel guide rails 42 are attached to the machine frame 41, and the rollers 44 roll on the guide rails 42 so that the ultrasonic oscillator 43 reciprocates in the direction of the arrow. A horn 45 that emits an ultrasonic wave is attached to the tip of the ultrasonic oscillator 43, and the tip of the horn 45 passes through the slide hole of the clamp plate 46 and faces the packaging material A clamped by the clamp plate 46. ing. Horn 45
A receiving table 4 for receiving ultrasonic waves from the horn 45
7 are provided. The receiving table 47 is formed in a cone shape that tapers toward the horn 45, and receives an ultrasonic wave at a tip end surface thereof. The receiving table 47 reciprocates in the direction of the arrow in synchronization with the reciprocating movement of the ultrasonic oscillator 43. Can be glued. The pedestal 47 is adjusted by an adjusting screw 48 so as to have a constant distance (0.1 to 0.2 mm) from the horn 45.

[0004]

However, in the conventional ultrasonic bonding apparatus, the gap between the horn 45 and the pedestal 47 is not properly adjusted, and the horn 45 and the pedestal 47 may come into contact with each other or may be repeatedly used. The horn 45 and the cradle 47 are worn. In this case, by forming the horn with a hard metal such as a titanium alloy, it is possible to prevent the horn from being worn to some extent. Needed replacement. In addition, the position of the cradle must be adjusted for each replacement, and the work of replacing the cradle has been troublesome.

The present invention has been made in view of such problems, and provides an ultrasonic bonding apparatus capable of improving the durability of a receiving table and reducing troublesome replacement work of the receiving table. It is intended to be.

[0006]

In order to achieve the above object, an ultrasonic bonding apparatus according to the present invention comprises a horn attached to a reciprocating ultrasonic oscillator, a ring-shaped ultrasonic wave receiving surface, and a rotary unit. A pedestal provided in a operable state in opposition to the horn and reciprocating in synchronization with the reciprocation of the ultrasonic oscillator; locking and unlocking the rotation of the pedestal; And a lock member that changes the wave receiving surface by rotating the.

[0007]

In the above construction, the rotation of the pedestal is locked by the lock member, and in this state, the pedestal and the ultrasonic oscillator are synchronously moved to perform ultrasonic bonding. When the receiving table is worn by the ultrasonic bonding, the rotation lock by the lock member is released, and the receiving table is rotated to change the wave receiving surface facing the horn. The only change is the rotation of the cradle,
Since there is no need to replace the cradle, troublesome replacement work is reduced. After this change, ultrasonic rotation is performed by locking the rotation of the pedestal. However, since the pedestal does not rotate, heat due to ultrasonic vibrations does not escape and reliable bonding can be performed.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an ultrasonic bonding apparatus according to the present invention.

FIG. 1 is a perspective view of one embodiment of the present invention, and FIG. 2 is a perspective view of a main part thereof. An ultrasonic oscillator 1 and a receiving table 2 are attached to respective distal ends of a coupler 3 branched into two branches. A vibrator (not shown) for performing ultrasonic vibration is mounted in the ultrasonic oscillator 1, and a horn 4 connected to the vibrator 1 protrudes from the tip of the ultrasonic oscillator 1.
The horn 4 expands the vibration from the vibrator and emits an ultrasonic wave from the emission surface 4a at the tip. On the other hand, cradle 2 is horn 4
Is attached to the connecting member 3 so as to be located on the opposite side of the packaging material A with respect to. The pedestal 2 is formed in a rotary-spin shape, and is supported by support brackets 5 and 6 which are attached to the connector 3 so as to be adjustable in the left-right and front-rear directions. The receiving table 2 receives ultrasonic waves from the horn 4, and a ring-shaped receiving surface 2a is provided on a side surface thereof.
At the emission surface 4a. The receiving table 2 is rotatable via a lock member 20, and the rotation forms a wave receiving surface 2a for receiving ultrasonic waves.
Changes in a direction orthogonal to the ultrasonic irradiation direction. Therefore, when the wave receiving surface of the receiving table 2 is partially worn, the receiving table 2 can be rotated by the lock member 20 and a new wave receiving surface can be opposed to the horn 4, whereby the ring-shaped wave receiving surface 2a can be formed. , The durability can be improved, and the troublesome replacement frequency can be reduced.

The distance between the receiving table 2 and the horn 4 is adjusted by moving the support brackets 5 and 6. For this reason, a long hole 9 extending in a direction perpendicular to the horn 4 direction is formed in the lower support bracket 5 attached to the connecting tool 3, and an adjusting screw 10 is attached to the long hole 9, thereby performing position adjustment in the left-right direction. . An upper support bracket 6 is attached to the lower support bracket 5, and an adjusting screw 7
, The upper support bracket 6 moves in the front-back direction, and the front-back position adjustment of the receiving table 2 is performed. The lock member 20 is attached to a tip portion of the upper support bracket 6, and the receiving base 2 is rotatably attached to a lower surface of the upper support bracket 6 while being connected to the lock member 20.

[0011] The connecting member 3 supporting the receiving table 2 and the ultrasonic oscillator 1 is connected to a rod 14 of a driving means 13 composed of a cylinder. Therefore, when the cylinder 13 is driven, the rod 14 expands and contracts, and the ultrasonic oscillator 1 and the receiving table 2 supported by the connecting tool 3 reciprocate integrally and synchronously. Accordingly, the receiving table 2 moves together with the horn 4 while always facing the horn 4, and receives the ultrasonic waves from the horn 4. In the figure, reference numeral 15 denotes a substrate, and horn 4
Are formed in the longitudinal direction to be slidably inserted. A clamp plate 17 is provided on a side surface of the substrate 15 on the receiving table 2 side so as to be able to advance and retreat.
The clamp plate 17 is attached to the rod end of the cylinder 18, and is pressed against the substrate 15 from above and below the slide hole 16 of the substrate 15 by operation of the cylinder 18, sandwiching the packaging material A between the substrate 15 and bonding. This prevents vibration of the packaging material A at the time.

The lock member 20 is, as shown in FIG.
Adjustment dial 2 connected to cradle 2 to rotate cradle 2
1, a lock piece 22 that contacts the adjustment dial 21 to lock the rotation of the dial 21, and a lock screw 23 that moves the lock piece 22 forward and backward in the direction of the adjustment dial 21.
And FIG. 3 shows a connection structure between the adjustment dial 21 of the lock member 20 and the receiving table 2.
1, a connecting shaft 24 penetrating the upper support bracket 6 extends downward. The connecting shaft 24 is inserted into the shaft hole 2 b of the pedestal 2, and the adjustment dial 21 and the pedestal are 2 are connected. Thus, when the adjustment dial 21 is rotated, the receiving table 2 is integrally rotated. FIG. 4 shows the structure of the adjustment dial 21 and the lock piece 22. As shown in FIG. 3, knurls for preventing slippage during the rotation operation are engraved on the outer peripheral surface of the adjustment dial 21, and lock holes 26 are formed on the outer peripheral surface at predetermined angles. . On the other hand, the lock piece 22 has an abutting surface 22a that is in contact with the outer peripheral surface of the adjustment dial 21 and is formed in an arc shape. The lock piece 22 includes a spring 27.
The click ball 28 urged in the protruding direction by the boss is attached. Click ball 28 is adjustment dial 2
The fitting dial 21 is engaged with the adjustment dial 21 by being fitted into the lock hole 26 on the outer peripheral surface. . Accordingly, the rotation of the receiving table 2 connected to the adjustment dial 21 is also locked. The lock screw 23 in FIG. 2 moves the lock piece 22 forward and backward,
A rotation lock of the adjustment dial 21 by the lock piece 22;
By turning the adjustment dial 21 in the unlocked state of the lock screw 23,
Receiving stand 2 rotates integrally and wave receiving surface 2a facing horn 4
Changes are made.

In such a configuration, the rotation of the receiving table 2 is locked by the lock member 20, and ultrasonic bonding is performed in this locked state. In the receiving table 2 in the rotation locked state, the wave receiving surface 2a does not move with respect to the emission surface 4a of the horn 4.
Because the heat from the ultrasonic vibration does not escape,
There is a merit that good and reliable bonding can be achieved. On the other hand, if the wave receiving surface of the receiving table 2 is partially worn by the ultrasonic bonding, the lock screw 23 is loosened, and the lock of the adjustment dial 21 by the lock piece 22 is released.
Then, the adjustment dial 21 is rotated until the next lock hole 26 of the adjustment dial 21 is engaged with the click ball 28. Since the receiving table 2 is integrally rotated by the rotation of the adjustment dial 21, a new wave receiving surface 2a faces the horn 4, and
Ultrasonic bonding using this wave receiving surface 2a can be performed. FIG. 5 shows how the wave receiving surface 2a is changed by adjusting the rotation of the receiving table 2. In the same figure, a dashed line B is a wave receiving surface receiving the ultrasonic wave from the horn 4, and when the wave receiving surface of this B portion is worn, the cradle 2 is rotated by the above-described operation, and is indicated by a chain line B1. A new wavefront faces horn 4. By sequentially rotating the receiving table 2 in this way, new receiving surfaces B1, B2, B3... Sequentially face the horn,
Substantially all around the wave receiving surface of the receiving stand 2 can be used.
Durability is improved. Therefore, since the frequency of replacing the receiving table 2 is greatly reduced, troublesome replacement can be reduced, and workability is improved. Moreover, the wave receiving surface can be changed only by the rotation of the receiving table 2, and the position adjustment of the receiving table 2 is not required at the time of this rotation, so that operation with little loss time can be secured.

Next, the operation of the ultrasonic bonding apparatus according to this embodiment will be described. The horn 4 of the present embodiment is formed of a hard metal such as a titanium alloy, and has wear resistance. Before the operation, the adjustment screws 11 and 12 adjust the distance between the pedestal 2 and the horn 4 to about 0.1 to 0.2 mm. After the adjustment is completed, when the switch is turned “ON”, the ultrasonic oscillator 1 is operated, and the packaging material A is lowered between the clamp plate 17 and the substrate 15 in a state of being overlapped. In this case, the packaging material A is supplied in a state where the edges on both sides are bonded in advance by passing through another ultrasonic bonding device having the same configuration. When the packaging material A is supplied to a predetermined length, the cylinder 18 operates to clamp the packaging material A between the clamp plate 17 and the substrate 15. In this state, the driving means 13 operates, the ultrasonic oscillator 1 and the receiving table 2 move integrally, and the ultrasonic wave from the horn 4 bonds the packaging material A. In this bonding operation, the horn 4 and the pedestal 2 operate integrally, and the horn 4 and the pedestal 2
Can be prevented from contacting with each other. Moreover, in the present embodiment, the receiving surface that receives the ultrasonic wave can be changed as appropriate by rotating the receiving table 2, so that even if the receiving table is easily worn, the durability is improved. In the bonding operation, an adhesive seal line and a cutting line are simultaneously formed by ultrasonic irradiation, and the overlapping packaging materials A are bonded to each other to form a bag, and separated into individual bags at the cutting line. Is done. When the ultrasonic oscillator 1 and the cradle 2 reach the end of movement, the cylinder 18 is operated to release the clamping of the packaging material A. As a result, the bag body falls downward, and then the packaging material A of the next stage is supplied to a predetermined length, and the clamp plate 17 and the substrate 1
5, the ultrasonic oscillator 1 and the pedestal 2 move together in the opposite direction. Then, at the time of the opposite movement, the bonding and the cutting are performed simultaneously, and thereafter, the bag is continuously manufactured by performing the same repeated operation.

The present invention is not limited to the above embodiment, but can be variously modified. For example, a ratchet mechanism may be used as a lock member that locks and releases the rotation of the receiving table 2, or may be performed by simply tightening a screw. In addition, the position of the horn 4 may be adjusted up and down, and the position of the emission surface 4a facing the receiving table 2 may be changed.
Thereby, the durability of the horn 4 can be improved.

[0016]

As described above, according to the present invention, the pedestal is rotated and locked in rotation with respect to the horn to change the wave receiving surface with respect to the horn, so that the durability of the pedestal can be increased. Have.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing one embodiment of the present invention.

FIG. 2 is a perspective view of a main part of one embodiment of the present invention.

FIG. 3 is an exploded perspective view showing a connection structure between a receiving table and a lock member.

FIG. 4 is a sectional view showing the structure of a lock member.

FIG. 5 is a plan view illustrating a change in a wave receiving surface due to rotation of a receiving table.

FIG. 6 is a plan view showing a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ultrasonic oscillator 2 Receiving stand 2a Receiving surface 4 Horn 20 Lock member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B29C 65/08 B65B 51/10 B31B 1/64-1/66

Claims (1)

(57) [Claims] 1. A horn attached to a reciprocating ultrasonic oscillator, and a wave receiving surface of the ultrasonic wave is formed in a ring shape, and is provided so as to face the horn in a rotatable state.
A receiving table that reciprocates in synchronization with the reciprocating movement of the ultrasonic oscillator, and a lock member that locks and unlocks the rotation of the receiving table and rotates the receiving table in the unlocked state to change the wave receiving surface. An ultrasonic bonding device, comprising: