JP2006068934A - Ultrasonic welder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultrasonic welder capable of always welding an object to be welded under constant pressure by moving an anvil with constant force. <P>SOLUTION: The end part of the horn 9a of an ultrasonic vibrator 9 is protruded from one end of a case 8, the anvil 10b is almost vertically formed from a slide member 10a and the end part of the anvil 10b is brought into contact with the end part of the horn 9a of the ultrasonic vibrator 9. The apex part of the triangle member 12a of a revolving member 12 is supported by the revolving shafts 11 mounted on both side surfaces of a case 8 and the revolving member 12 is constituted so that a grasping part 12b is formed from the triangle member 12a so as to be inclined under the case 8. A drive shaft 13 is fixed in the vicinity of the bottom part of the triangle member 12a of the revolving member 12 and a support shaft 14 pierces the slide member 10a of an anvil part 10 to be fixed to the slide member 10a while a U-shaped spring 15 is mounted between the drive shaft 13 and the support shaft 14. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ultrasonic welder that can move an anvil with a constant force and always weld an object to be welded with a constant pressure.

  Conventionally, as shown in FIG. 7, in order to weld the end portions of the package, projections 1a and 2a are provided at one end of the upper support member 1 and the lower support member 2, and the projecting portions 1a and 2a are turned around. A moving shaft 3 is mounted, a spring 4 is provided at a position away from the rotating shaft 3, and an ultrasonic transducer 5 is mounted so that the vibrating end 5 a protrudes from the other end of the upper support member 1. The anvil 6 is attached to the other end of the lower support member 2, the welded material 7 is inserted between the vibration end 5 a of the ultrasonic vibrator 5 and the anvil 6, and the vibration end 5 a and the anvil 6 are pressed against each other. An ultrasonic welder has been proposed in which ultrasonic vibration is generated and a protruding weld 7 inserted between the vibration end 5a and the anvil 6 is welded.

However, when welding the object 7 to be welded, the upper support portion 1 and the lower support portion 2 are pressed against each other against the spring 4 so that they are pressed against each other. Is not constant, and the welding state varies depending on how the operator's force is applied, so that there is a problem that processing is difficult. Also, if the upper support member 1 and the lower support member 2 are pressed strongly, the anvil 6 and the ultrasonic vibrator There is a problem that an excessive force is applied to the vibration end 5 a of 5 and the anvil 6 and the horn 5 a of the ultrasonic vibrator 5 are damaged, or the mounting fixing screw of the anvil 6 is broken.
Japanese Patent Application No. 2002-228253

  The problem to be solved is that the force applied to the upper support portion 1 and the lower support portion 2 is not constant, and the welding state varies depending on the force applied by the operator, so that the processing is difficult.

  In the present invention, the case is configured so that the tip of the horn of the ultrasonic vibrator protrudes at the end portion, the anvil portion has a sliding member attached to the lower portion of the case, and the anvil protrudes upward from the sliding member, The sliding member and the anvil are configured integrally, and the end of the anvil and the end of the horn of the ultrasonic transducer are in contact with each other. The rotating member is triangular on the rotating shafts mounted on both sides of the case. The vicinity of the apex of the member is rotatably mounted, a gripping portion is provided in a direction away from the case from the triangular member, the drive shaft is fixed near the bottom of the triangular member of the rotating member, and the support shaft is a sliding portion of the anvil portion The spring is mounted between the drive shaft and the support shaft, and the spring is pushed with the drive shaft fixed to the triangular member of the rotating member by pushing the gripping portion of the rotating shaft closer to the case, or Pull the anvil part by pushing or pulling the support shaft with a spring The end of the anvil in contact with the end portion of the horn of the ultrasonic vibrator, is to bond the members is sandwiched between the end portion and the end portion of the anvil of the horn.

  The ultrasonic welder of the present invention attaches a spring between the drive shaft attached to the rotation member and the support shaft attached to the sliding portion of the anvil part, and rotates the rotation member so that the drive shaft Since the anvil is driven by pushing or pulling the spring and moving the sliding member on the support shaft, the force to move the anvil is constant by the spring even if the force applied to the rotating member is uneven. Therefore, the anvil is always pressed against the end of the horn of the ultrasonic vibrator with a constant force, and the object to be welded is always welded with a constant force.

  1 is a side view of an ultrasonic welder according to an embodiment of the present invention, FIG. 2 is a side view in which a part of the ultrasonic welder in FIG. 1 is cut out, and FIG. 3 is a top view of the ultrasonic welder in FIG. 4 is a cross-sectional view of the drive shaft portion of FIG. 1, FIG. 5 is a cross-sectional view of the support shaft portion of FIG. 1, and the end portion of the horn 9a of the ultrasonic vibrator 9 projects from one end of the case 8. The sliding member 10a of the anvil part 10 is slidably mounted on the lower part of the case 8, and the anvil 10b is formed almost vertically from the sliding member 10a. The end of the anvil 10b is the horn 9a of the ultrasonic vibrator 9. The apex portion of the triangular member 12a of the rotating member 12 is supported by the rotating shafts 11 that are configured to come into contact with the end portions and are mounted on both side surfaces of the case 8, and the rotating member 12 extends from the triangular member 12a. A gripping portion 12b is formed obliquely below the case 8, and the triangular member 12 of the rotating member 12 is further formed. The drive shaft 13 is fixed in the vicinity of the bottom of the support member 14, and the support shaft 14 is fixed to the slide member 10 a through the sliding member 10 a of the anvil portion 10, and is U-shaped between the drive shaft 13 and the support shaft 14. The spring 15 is attached.

  In the ultrasonic welder of this example configured as described above, as shown in FIG. 1, the gripping portion 12 b of the rotating member 12 that is rotatably mounted on the side surface of the case 8 is pressed in the direction of the case 8. Then, the U-shaped spring 15 is pushed against the force of the spring by the drive shaft 13 fixed to the triangular member 12a of the rotating member 12, and the sliding member 10a of the anvil part 10 is returned by the return force of the spring 15. Since the support shaft 14 fixed to is pushed, the support shaft 14 is moved by the return force of the spring 15, and the end portion of the anvil 10 b integrated with the sliding member 10 a of the anvil portion 10 is the ultrasonic transducer 9. It moves to the direction of the horn 9a, and the to-be-welded object interposed between the edge part of the anvil 10b and the front-end | tip of the horn 9a can be welded.

  As described above, in the ultrasonic welder of this embodiment, the gripping portion 12b of the rotating member 12 is rotated, so that the spring 15 is pushed by the drive shaft 13 and the support shaft 14 is pushed by the return force of the spring 15. Since the support shaft 14 is always pushed by the return force of the spring 15 and the sliding member 10a of the anvil part 10 is pushed, the end of the anvil 10b can always be pressed against the horn 9a of the ultrasonic vibrator 9 with a constant force. it can.

  FIG. 6 is a side view in which a part of an ultrasonic welder according to another embodiment of the present invention is cut away. 8 is a case, 9 is an ultrasonic vibrator, 9a is a horn, 10 is an anvil portion, and 10a is sliding. The members, 10b are anvils, 11 is a rotating shaft, 12 is a rotating member, 12a is a gripping part, 13 is a driving shaft, and 14 is a supporting shaft. However, in this embodiment, the support shaft 14 is fixed to the sliding member 10a substantially below the anvil 10b, and the coil spring 16 is mounted between the support shaft 14 and the drive shaft 13 fixed to the rotating member 12. ing.

  In this embodiment configured as described above, when the grip portion 12a of the rotating member 12 is pressed in the direction of the case 8, the drive shaft 13 fixed to the rotating member 12 is moved, whereby the coil spring 16 is pulled. Accordingly, when the coil spring 16 pulls the support shaft 14, the sliding member 10 a of the anvil portion 10 moves to the right in the drawing, so that the end portion of the anvil 10 b integrated with the sliding member 10 a is obtained. And an object to be welded placed between the end of the horn 9a of the ultrasonic vibrator 9 is welded.

  In this embodiment, the drive shaft 13 fixed to the rotating member 12 is moved by the rotation of the grip portion 12 a of the rotating member 12 as described above, whereby the coil spring 16 is pulled, and the coil spring 16 The support shaft 14 moves, the sliding member 10a of the anvil part 10 moves together with the support shaft 14, and the object to be welded sandwiched between the anvil 10a and the horn 9a of the ultrasonic vibrator 9 is welded.

  1 and 2, the U-shaped spring 15 is used as the spring mounted between the drive shaft 13 and the support shaft 14. However, a coil spring or a leaf spring can be formed. It may be formed.

It is a side view of the ultrasonic welder of the Example of this invention. It is a partial cross section side view of the ultrasonic welder of FIG. FIG. 2 is a top view of the ultrasonic welder of FIG. 1. It is sectional drawing of the drive shaft part of the ultrasonic welder of FIG. It is sectional drawing of the support shaft part of the ultrasonic welder of FIG. FIG. 6 is a side view in which a part of an ultrasonic welder according to another embodiment of the present invention is cut away. It is a block diagram of the conventional ultrasonic welder.

Explanation of symbols

8 Case 9 Ultrasonic vibrator 10 Anvil 11 Rotating shaft 12 Rotating member 13 Drive shaft 14 Support shaft 15 U-shaped spring 16 Coil spring

Claims (4)

  An ultrasonic vibrator is built in, and a case in which the tip of the horn of the ultrasonic vibrator protrudes to the end, a sliding member attached to the lower part of the case, and a contact portion of the anvil protruding from the sliding member An anvil portion mounted to face the horn of the ultrasonic transducer, and a rotation shaft mounted on both sides of the case so as to be rotatable in the vicinity of the apex of the triangular member, and from the triangular member to the case A rotating member provided with a grip portion in a direction away from the driving member, a driving shaft fixed to the vicinity of the bottom of the triangular member of the rotating member, a supporting shaft fixed to the sliding member of the anvil portion, and the driving shaft A spring mounted between the support shafts, and by pressing the gripping portion of the rotating shaft so as to be close to the case, the spring is pushed by a drive shaft fixed to the triangular member of the rotating member, By pushing the support shaft with a spring, the Wherein the contact portion of the anvil Nbiru portion in contact with the horn of the ultrasonic transducer, ultrasonic welding device, characterized in that bonding the member which is held between the horn and the contact portion of the anvil.   The ultrasonic welder according to claim 1, wherein the spring mounted between the drive shaft and the sliding shaft is a U-shaped spring. The ultrasonic welder according to claim 1, wherein the spring mounted between the drive shaft and the sliding shaft is a coil spring.   An ultrasonic vibrator is built in, a case in which the tip of the horn of the ultrasonic vibrator protrudes to the end, a sliding member attached to the lower part of the case, and a contact portion of the anvil protruding from the sliding member An anvil portion mounted so as to face the horn of the ultrasonic transducer, and a rotation shaft mounted on both sides of the case so as to be rotatable in the vicinity of the apex of the triangular member, and from the triangular member to the case A rotating member provided with a grip portion in a direction away from the driving member, a drive shaft fixed to the vicinity of the bottom of the triangular member of the rotating member, and a support shaft fixed to the lower part of the anvil of the sliding member of the anvil part And a coil spring mounted between the drive shaft and the support shaft, and a drive shaft fixed to the triangular member of the rotating member by pushing the gripping portion of the rotating shaft closer to the case. Pull the coil spring to By pulling the support shaft with a spring, the contact portion of the anvil of the anvil portion is brought into contact with the horn of the ultrasonic vibrator, and the member sandwiched between the contact portion of the horn and the anvil is bonded. The characteristic ultrasonic welder.

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