JP4649576B2 - Ultrasonic welder - Google Patents

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 ends of the package, protrusions 1a and 2a are provided at one end of the upper support member 1 and the lower support member 2, and the protrusions 1a and 2a are rotated around the protrusions 1a and 2a. 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 1 and the lower support 2 are welded against each other against the spring 4, so that the force applied to the upper support 1 and the lower support 2 is applied. 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, and when the upper support member 1 and the lower support member 2 are strongly pressed, 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 horn 5 a of the anvil 6 and the ultrasonic transducer 5 is 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, an ultrasonic vibrator is built in, a case in which the tip of the horn of the ultrasonic vibrator protrudes to the end, and a sliding member is attached to the lower portion of the horn of the ultrasonic vibrator of the case, The anvil part protruding from the sliding member is attached to both sides of the anvil part attached so as to face the horn of the ultrasonic vibrator and the part of the case where the horn of the ultrasonic vibrator is attached. A pivot shaft, and a pivotal portion mounted on the pivot shaft so that the vicinity of the apex formed by the two sides of the triangle member sandwiches the case, and is integrally formed from the bottom of the two sides of the triangle member. A rotating member provided with a gripping part extending obliquely long below the case, a drive shaft fixed to an intermediate portion of the two sides of the triangular member of the rotating member, and sliding of the anvil part A support shaft fixed to the member, the drive shaft and the support Consists of a U-shaped spring which is mounted between, by moving the grip portion of the rotary member so as to approach to the case, the U-shaped with a drive shaft fixed to the triangular member of the rotary member By pressing the spring and pressing the support shaft fixed to the sliding member of the anvil part with the U-shaped spring, the contact part of the anvil part of the anvil part is brought into contact with the horn of the ultrasonic transducer, is intended to dissolve wear member is sandwiched between the contact portion of the anvil and the horn, and a built-in ultrasonic vibrator, a case in which the tip of the horn of the ultrasonic vibrator is projected on the end, the A sliding member attached to a lower part of the horn of the ultrasonic vibrator of the case, and an anvil part attached so that a contact part of the anvil protruding from the sliding member faces the horn of the ultrasonic vibrator; case the ultrasonic vibrator A rotating shaft mounted on both sides of the portion fitted with a horn, near the apex formed by the two sides of the triangle of the triangular member is mounted rotatably so as to sandwich the case the pivoting axis, wherein Rotating member provided with a gripping part extending obliquely and vertically below the case integrally from the bottom of the two sides of the triangular member, and fixed to an intermediate portion of the two sides of the triangular member of the rotating member a drive shaft and a support shaft fixed to the sliding member of the anvil portion consists of a coil spring mounted between said support shaft and said drive shaft, close to the gripping portion of the rotary member to the case by moving to pull the said coil spring with the drive shaft fixed to the triangular member of the rotary member by pulling the support shaft fixed to the sliding member of the anvil portion with said coil spring, said anvil Part of the anvil Wherein the contact portion in contact with the horn of the ultrasonic vibrator, a member which is held between the horn and the contact portion of the anvil is to dissolve wear.

The ultrasonic welder of the present invention mounts a U-shaped spring or a coil spring between a drive shaft mounted on a rotating member and a support shaft mounted on a sliding portion of an anvil portion, and rotates the rotating member. By pushing or pulling the U-shaped spring or coil spring with the drive shaft and moving the sliding member with the support shaft to drive the anvil, even if the force applied to the rotating member is uneven, Since the force that moves the anvil is constant by the U-shaped spring or coil spring , the anvil is always pressed against the end of the horn of the ultrasonic vibrator with a constant force, and the welded object 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 formed by two sides and an apex of a triangle, which is configured to come into contact with the end portion, with one end of the rotary member 12 projecting from the rotary shaft 11 mounted on both side surfaces of the case 8. elongation but is supported, also, obliquely from the pivot member 12 is triangular members 12a below the casing 8 Gripped portion 12b is formed on an end portion, further, the drive shaft 13 is fixed near the bottom of the triangular members 12a of the rotating member 12, also the support shaft 14 through the sliding member 10a of the anvil portion 10 is slidingly A U-shaped spring 15 is mounted between the drive shaft 13 and the support shaft 14 and is fixed to the moving member 10a.

  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 in the direction of the horn 9a, and the object to be welded interposed between the end of the anvil 10b and the tip of the horn 9a can be clamped and welded by frictional heat caused by ultrasonic vibration.

  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 is pulled on the support shaft 14, the sliding member 10 a of the anvil portion 10 moves in the right direction 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.

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 (2)

A case in which an ultrasonic vibrator is built in, a tip of the horn of the ultrasonic vibrator protrudes from an end, and a sliding member is attached to a lower portion of the horn of the ultrasonic vibrator in the case; An anvil portion mounted so that a contact portion of the anvil protruding from the horn of the ultrasonic transducer faces the horn of the ultrasonic transducer, and a rotating shaft mounted on both sides of the portion of the case where the horn of the ultrasonic transducer is mounted If, near the vertex formed by the two sides of the triangle of the triangular member to the pivoting shaft is mounted rotatably so as to sandwich the case, the case together from the bottom of the two sides of the triangular member A rotating member provided with a gripping portion extending obliquely long downward, a drive shaft fixed to an intermediate portion between the two sides of the triangular member of the rotating member, and a sliding member fixed to the anvil portion Mounted between the support shaft and the drive shaft and the support shaft Consists of a U-shaped springs, by moving the grip portion of the rotary member so as to approach to the case, press the U-shaped spring with the drive shaft fixed to the triangular member of the rotary member, By pressing the support shaft fixed to the sliding member of the anvil part with the U-shaped spring, the anvil contact part of the anvil part is brought into contact with the horn of the ultrasonic vibrator, and the horn and the ultrasonic welding device, characterized in that the solvent wearing member which is clamped between the contact portion of the anvil. A case in which an ultrasonic vibrator is built in, a tip of the horn of the ultrasonic vibrator protrudes from an end, and a sliding member is attached to a lower portion of the horn of the ultrasonic vibrator in the case; An anvil portion mounted so that a contact portion of the anvil protruding from the horn of the ultrasonic transducer faces the horn of the ultrasonic transducer, and a rotating shaft mounted on both sides of the portion of the case where the horn of the ultrasonic transducer is mounted If, near the vertex formed by the two sides of the triangle of the triangular member to the pivoting shaft is mounted rotatably so as to sandwich the case, the case together from the bottom of the two sides of the triangular member A rotating member provided with a gripping portion extending obliquely long downward, a drive shaft fixed to an intermediate portion between the two sides of the triangular member of the rotating member, and a sliding member fixed to the anvil portion Mounted between the support shaft and the drive shaft and the support shaft And consists of a coil spring, by moving the grip portion of the rotary member so as to approach to the case, the pull coil spring in the drive shaft fixed to the triangular member of the rotary member, with the coil spring By pulling the support shaft fixed to the sliding member of the anvil part, the contact part of the anvil part of the anvil part is brought into contact with the horn of the ultrasonic vibrator, and the contact part of the horn and the anvil is ultrasonic welding device, characterized in that the solvent wearing nipped member.

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