JP2014226826A - Ultrasonic welding equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the operability of ultrasonic welding equipment in accordance with an object to be welded, and also, to increase versatility.SOLUTION: The ultrasonic welding equipment is provided with regulation means of regulating the opening allowable width L between a first grip 20 and a second grip 30. The regulation means, e.g., includes: a screw hole member 33 with a screw hole 39 formed at either the first grip 20 or the second grip 30; and a regulation screw 50 screwed with the screw hole 39. In the regulation screw 50, the first grip 20 and the second grip 30 are energized by a grip energization spring, and the opening allowable width L between a horn 26 and a deposition metal fitting 34 are regulated so as to be adjustable.

Description

  The present invention relates to an ultrasonic welder, and more particularly to a manual ultrasonic welder that is held and operated with one hand.

  As disclosed in Patent Document 1, generally, a manual ultrasonic welder is a structure in which base end portions of an upper grip and a lower grip are connected to each other by a shaft. An operator operates the ultrasonic welder by holding the lower grip on another finger so as to place the thumb on the upper grip, and pressing the upper grip with the thumb. A welding fitting is provided at the tip of one of the upper grip and the lower grip (usually the lower grip). In addition, an ultrasonic transducer is provided on the other of the upper grip and the lower grip (usually the upper grip). The ultrasonic vibrator has a horn that sandwiches an object to be welded with a welding fitting. Furthermore, between the upper grip and the lower grip, a spring that biases both grips in a direction in which the tip portions of both grips are separated from each other is interposed. Further, the switch of the ultrasonic transducer is connected by pushing the upper grip into the lower grip against the urging force of the spring.

  When the horn and the welding fitting sandwich the object to be welded and the switch is connected, ultrasonic vibration is generated between the horn and the welding fitting. This ultrasonic vibration induces heat generation in the welding object due to friction, and the welding object is joined.

JP 2004-66610 A

  By the way, it is not always easy to set the allowable opening width of the horn and the welding fitting when the upper grip and the lower grip are in a free state.

  From the viewpoint of workability, the opening allowable width is preferably as short as possible. This is because the stroke required for one operation is shortened and the fatigue of the operator is reduced. However, when the opening allowable width is short, a large-sized welded object cannot be sandwiched, and versatility becomes poor. Moreover, since there is a possibility that the horn and the welding fitting are involuntarily joined by slight vibration, it is necessary to set the biasing force of the spring considerably strong, which is not preferable because the load during operation increases.

  On the other hand, when the opening allowable width is set wide, versatility is enhanced. It is also possible to keep the biasing force of the spring low. However, when the permissible opening width is set wide, the stroke required for one operation becomes long regardless of the type of the object to be welded, and the operability for the operator is lowered. Therefore, even if the biasing force of the spring is set to be weak, the specification is difficult to use and easily fatigued.

  This invention is made | formed in view of the subject mentioned above, and provides the ultrasonic welder which can improve operativity according to the magnitude | size of to-be-welded object, and can improve versatility. Is an issue.

  In order to solve the above-described problems, the present invention provides a first grip, a second grip, a shaft that rotatably connects the first grip and the second grip, and a super grip provided on the first grip. A sound wave vibrator, a welded fitting provided on the second grip, a horn provided on the ultrasonic vibrator and sandwiching an object to be welded between the welded fitting, the first grip, and the second grip A grip biasing spring that biases the first grip and the second grip in a direction in which the weld metal and the horn are separated from each other; and an allowable opening width of the horn and the weld metal. A regulating means for regulating, wherein the regulating means is configured to be capable of adjusting the opening allowable width.

  In this aspect, the first grip and the second grip can be opened and closed relatively by the shaft. Further, the tip end portion of the first grip and the tip end portion of the second grip are biased in the direction away from each other (opening direction) by the biasing force of the grip biasing spring. Here, in this aspect, since a restriction means for restricting the opening allowable width of the horn and the welding metal fitting is provided, when opening a thin welded object, the opening allowable width should be set narrow. Can do. Therefore, the operator can easily perform the welding operation with a short stroke. On the other hand, for an object to be welded that requires a wide allowable opening width, the allowable opening width can be changed widely. Therefore, the versatility of the ultrasonic welder can be improved.

  In the ultrasonic welder according to a preferred aspect, the restricting means is provided on a proximal end side with respect to the shaft in either one of the first grip and the second grip, and the first grip and the second grip A screw hole member having a screw hole that opens to the other, and the other of the first grip and the second grip when the first grip and the second grip are opened by screwing into the screw hole. An adjustment screw is provided that regulates the permissible opening width by coming into contact with the base end side. In this aspect, the base end side of the other of the first grip and the second grip faces the adjustment screw on the opposite side of the horn and the welded metal with the shaft interposed therebetween. Therefore, when the horn and the welded metal fitting are opened with the shaft as the center of rotation, the base end side portion approaches toward the adjusting screw and finally comes into contact. By this contact, the allowable opening width of the horn and the welded metal is defined. Therefore, by adjusting the amount of protrusion when the adjustment screw is screwed into the screw hole and changing the position where the base end side portion and the adjustment screw abut, the adjustment screw, screw hole (or screw hole) The hole member) constitutes a main element of a restricting means that restricts the permissible opening width of the horn and the welding metal fitting. Thus, in this aspect, the regulating means can be configured with a simple configuration by the adjustment screw and the screw hole member having the screw hole.

  The ultrasonic welder according to a preferred aspect further includes an elastic member that applies a biasing force between the adjusting screw and the screw hole member. In this aspect, since the rotation of the adjustment screw is restricted by the urging force of the elastic member, the adjustment screw can be prevented from being loosened carelessly. Preferably, the ultrasonic welder further includes a knob integrated with the adjustment screw, and the knob faces the outside from an opening formed in one of the first grip and the second grip. . In this aspect, since the adjustment screw can be turned by operating the knob, the operability is improved.

  In the ultrasonic welder according to a preferred aspect, the opening is opened at a base end portion of one of the first grip and the second grip. In this aspect, when the first grip and the second grip are operated, the knob faces the outside at a position where it does not get in the way, so there is an advantage that there is no possibility that the knob is inadvertently operated. Further, when gripping the first grip and the second grip, the knob does not get in the way regardless of the dominant arm.

  In a preferred embodiment of the ultrasonic welder, the elastic member is a conical coil spring. In this aspect, when the elastic member is compressed by tightening the adjusting screw, the small diameter side is folded into the large diameter side and the spring height is lowered, which can contribute to the miniaturization of the ultrasonic welder. .

  As described above, according to the present invention, since the restricting means that regulates the allowable opening width of the horn and the welded fitting is provided, the object to be welded whose opening allowable width can be set narrow is processed. In this case, by setting the allowable opening width narrow, it is possible to easily perform the welding operation, while for the welding object that requires a wide allowable opening width, the allowable opening width is changed widely. Since it can cope with, the operability can be enhanced according to the size of the object to be welded, and the versatility can be enhanced.

It is the figure which showed the usage example of the ultrasonic welder which concerns on one Embodiment of this invention in the cross section. It is a perspective view of the ultrasonic welder of FIG. It is a principal part expanded sectional view of FIG. It is a perspective view which expands and shows the base end part of the ultrasonic welder of FIG. It is a perspective view which shows a state when the ultrasonic welder of FIG. 1 is mounted | worn with a main body.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

  With reference to FIG.1 and FIG.2 (A) (B), the ultrasonic welder 10 which concerns on this embodiment is provided with the upper grip 20 as a 1st grip, and the lower grip 30 as a 2nd grip. . These are structures constituting a handle that can be held with one hand. In the following description, one end side of the upper grip 20 and the lower grip 30 is temporarily referred to as a proximal end side, and the opposite side is temporarily referred to as a distal end side.

  The upper grip 20 includes a resin casing 21. The casing 21 contains an ultrasonic transducer 22 inside. The ultrasonic vibrator 22 is fixed inside the casing 21 via a mounting bracket 23 fixed inside the casing 21. The power supply cord 24 of the ultrasonic transducer 22 extends to the outside via a rubber attachment portion 25 fixed to the base end portion of the casing 21.

  The horn 26 of the ultrasonic transducer 22 is exposed downward (down grip side) from the tip portion through an opening 27 formed at the tip of the casing 21.

  Next, the lower grip 30 includes a resin casing 31. The casing 31 is formed in a cross-sectional dish shape having a wall portion 32 on the periphery. An unillustrated bearing is formed at the base end portion of the wall portion 32. A metal shaft 40 is fixed to the bearing. The shaft 40 is connected to a bearing (not shown) formed at the proximal end portion of the upper grip 20 so as to be relatively rotatable. Therefore, the upper grip 20 is rotatably connected to the lower grip 30 via the shaft 40.

  A metal plate 33 that covers the bottom of the casing 31 is screwed into the wall portion 32. At the front end of the metal plate 33, a welding metal fitting 34 is provided so as to sandwich an object to be welded with the horn 26. Of the metal plate 33, the base end side portion of the welding metal fitting 34 is covered with a resin decorative member 35.

  Two spring seats 36 </ b> A and 36 </ b> B are formed in the middle portion of the decorative member 35 in the front-rear direction (the direction in which the distal end side and the proximal end side face each other). Each of the spring seats 36 </ b> A and 36 </ b> B is a boss-like portion that is integrally formed when the decorative member 35 is molded. A switch operating spring 37 is mounted on the spring seat 36A on the distal end side. A grip biasing spring 38 is attached to the spring seat 36B on the base end side. Each of the springs 37 and 38 is embodied by a coil spring. Each spring seat 36A, 36B serves as a presser for pressing the corresponding coil spring (switch operating spring 37, grip biasing spring 38). The switch operating spring 37 faces the middle part of the upper grip 20. An opening 28 is formed in the casing 21 of the upper grip 20 at a portion facing the upper end of the switch operating spring 37. In the opening 28, a microswitch 29 of the ultrasonic transducer 22 is disposed. Therefore, when the upper grip 20 is pushed around the shaft 40, the microswitch 29 is pressed by the switch operating spring 37, and the ultrasonic transducer 22 is activated. The grip biasing spring 38 faces the lower surface of the casing 21 of the upper grip 20 on the proximal end side with respect to the switch operating spring 37. Accordingly, the casing 21 is first brought into contact with the grip urging spring 38 in the free state, and is maintained in an elastically open posture.

  A portion of the base end portion of the metal plate 33 is bent further on the base end side than the portion where the shaft 40 is fixed to form a step. The step forms a space with the bottom of the casing 31. A screw hole 39 is formed in a portion forming this space. The screw hole 39 is open on the base end side with respect to the shaft 40 so as to face the lower surface of the base end of the mounting bracket 23 of the upper grip 20. Thus, in this embodiment, the metal plate 33 is also an example of a screw hole member in which the screw hole 39 is formed.

  An adjustment screw 50 is screwed into the screw hole 39 from below. The upper end portion of the adjustment screw 50 faces the lower surface of the base end of the mounting bracket 23 of the upper grip 20. In a state where the grip bias spring 38 is biased, the bottom surface of the base end of the mounting bracket 23 abuts on the top surface of the adjustment screw 50. As a result, the adjustment screw 50 has an opening allowable width L (the upper limit when the upper grip 20 and the lower grip 30 are biased by the grip biasing spring 38 and the horn 26 and the welded fitting 34 are opened). Stipulate. When the adjustment screw 50 is rotated in the direction of retracting downward, the opening allowable width L (Lmax) becomes longer as shown by the solid line in FIG. On the other hand, when the adjustment screw 50 is rotated in the upward projecting direction, the allowable opening width L (Lmin) when the distal end portion of the upper grip 20 is rotated in the opening direction is shown by the phantom line in FIG. It becomes shorter.

  The adjusting screw 50 has a knob 51 integrally therewith. The knob 51 is a disk-shaped resin member, and a plurality of recesses 52 for operation with a finger are formed on the outer periphery.

  With reference to FIG. 3, an annular spring seat 53 is formed on the back surface of knob 51 (the side from which adjustment screw 50 protrudes). The spring seat 53 is embodied by a groove formed integrally when the knob 51 is molded. The spring seat 53 is provided with a coil spring 54 as an elastic member. The coil spring 54 is interposed between the metal plate 33 and the knob 51, and by applying a biasing force between the metal plate 33 and the knob 51, friction between the screw hole 39 and the screwed portion of the adjustment screw 50 is achieved. Increase power. As a result, the coil spring 54 functions as a loosening prevention for the adjusting screw 50, and also has a function of restricting the knob 51 from rotating carelessly. In the illustrated example, the coil spring 54 is a truncated cone-shaped conical coil spring having a small diameter on the upper end side. For this reason, when the adjustment spring 50 is tightened and the coil spring 54 is compressed, the small diameter side (the upper end side in the illustrated example) is folded into the large diameter side (the lower end side in the illustrated example), The height of the coil spring 54 is lowered. In the illustrated example, the large-diameter side of the adjusting screw 50 is seated on the spring seat 53 of the knob 51. Thereby, the spring seat 53 serves as a presser for pressing the coil spring 54.

  As shown in FIG. 4, an opening 55 is formed on the end surface in the longitudinal direction of the base end portion of the wall portion 32 of the lower grip 30. The knob 51 is partially exposed from the opening 55. Therefore, the operator can rotate the adjustment screw 50 by operating the knob 51 from the opening 55. Above the opening 55, a plurality of protrusions 56 functioning as indicators are provided. The protrusions 56 are arranged side by side. These protrusions 56 are changed in height from one to the other in order, corresponding to the opening allowable width L and the rotation direction of the knob 51. For example, in the direction in which the knob 51 rotates in the direction in which the adjustment screw 50 protrudes upward (in the example of FIG. 4, the direction from the right side to the left side), each projection 56 increases one by one from upstream to downstream. ing. Thus, the operator can adjust the allowable opening width L while looking at the protrusion 56 as the indicator.

  Next, referring to FIG. 5, the ultrasonic welder 10 as described above is used in combination with the main body 60 for control. The main body 60 has a casing 61. The casing 61 has a flat, substantially rectangular parallelepiped appearance. A control board that controls the ultrasonic transducer 22 of the ultrasonic welder 10 is built in the casing 61. The ultrasonic transducer 22 is connected to the control board via a power supply cord 24. A holder 62 is integrally formed on the upper portion of the casing 61. The holder 62 has a mounting portion 63 that receives the lower grip 30 of the ultrasonic welder 10 and a semicircular arc-shaped hood portion 64 that is formed at the end of the mounting portion. The operator inserts the tip portion of the ultrasonic welder 10 toward the hood portion 64, whereby the ultrasonic welder 10 is placed on the placement portion 63 as shown in FIG. At this time, the specifications of each part are set so that the microswitch 29 of the ultrasonic transducer 22 is maintained in a blocked state. Further, by holding the ultrasonic welder 10 placed on the holder 62 with one hand, the operator can easily remove the ultrasonic welder 10 from the holder 62 and perform the welding operation. In FIG. 5, 65 is a power switch, and 66 is a display LED.

  With reference to FIG. 1, in the above-described configuration, at the time of welding work, an operator holds the lower grip 30 on another finger so as to place the thumb on the upper grip 20, and pushes the upper grip 20 with the thumb. Thus, the ultrasonic welder 10 is operated.

  In the present embodiment, an adjustment screw 50 that constitutes a main element of the regulating means is provided. Therefore, as shown in FIG. 1, since the opening allowable width L can be adjusted between Lmin and Lmax, for example, it becomes possible to sandwich various objects to be welded having different thicknesses. Therefore, in this embodiment, when processing a thin welded object, the opening allowable width L can be set narrow. Therefore, the operator can easily perform the welding operation with a short stroke. On the other hand, for an object to be welded that requires a wide permissible opening width L, the permissible opening width L can be changed widely. Therefore, the versatility of the ultrasonic welder 10 can be improved.

  Further, the restricting means is screwed into the screw hole 39 and a metal plate 33 as a screw hole member provided on the lower grip 30 on the base end side with respect to the shaft 40 and having a screw hole 39 that opens to the upper grip 20. Thus, when the upper grip 20 and the lower grip 30 are opened when facing the mounting bracket 23 of the upper grip 20 on the base end side with respect to the shaft 40, the mounting bracket 23 of the upper grip 20 (specificity of the portion on the base end side) And an adjustment screw 50 that regulates the opening allowable width L by abutting with the example). For this reason, in this embodiment, the mounting bracket 23 of the upper grip 20 faces the adjustment screw 50 on the opposite side of the horn 26 and the welding bracket 34 with the shaft 40 interposed therebetween. Therefore, when the horn 26 and the welding bracket 34 are opened with the shaft 40 as the rotation center, the mounting bracket 23 approaches the adjusting screw 50 and finally comes into contact. Due to this contact, the allowable opening width L of the horn 26 and the welding fitting 34 is regulated. Therefore, by adjusting the protruding amount when the adjustment screw 50 is screwed into the screw hole 39 and changing the position where the mounting bracket 23 and the adjustment screw 50 abut, the adjustment screw 50 and the screw hole 39 ( The metal plate 33) constitutes a main element of a restricting means for restricting the allowable opening width L of the horn 26 and the welding fitting 34 so as to be adjustable. Thus, in this aspect, the regulating means can be configured with a simple configuration by the adjusting screw 50 and the metal plate 33 having the screw hole 39.

  Further, the present embodiment further includes a coil spring 54 as an elastic member for applying an urging force between the adjusting screw 50 and the metal plate 33 (screw hole member) in which the screw hole 39 is formed. For this reason, in this embodiment, since rotation of the adjusting screw 50 is restricted by the urging force of the elastic member, it is possible to prevent the adjusting screw 50 from being loosened carelessly.

  The present embodiment further includes a knob 51 integrated with the adjustment screw 50, and the knob 51 faces the outside from an opening 55 formed in the lower grip 30. For this reason, in this embodiment, since the knob 51 can be operated and the adjustment screw 50 can be rotated, operativity improves.

  In the present embodiment, the opening 55 is open at the base end of one of the upper grip 20 and the lower grip 30. For this reason, in this embodiment, when the upper grip 20 and the lower grip 30 are operated, the knob 51 faces outside at a position where it does not get in the way, so there is an advantage that the knob 51 may not be operated carelessly. Further, when gripping the upper grip 20 and the lower grip 30, the knob 51 does not get in the way regardless of the dominant arm.

  In the present embodiment, the coil spring 54 as an elastic member is a conical coil spring. For this reason, in this embodiment, when the adjustment screw 50 is tightened and the coil spring 54 is compressed, the small diameter side is folded into the large diameter side and the spring height is lowered, so the ultrasonic welder 10 can be downsized. Can contribute.

  As described above, according to the present embodiment, the upper grip 20 and the lower grip 30 are urged by the grip urging spring, and the adjustment screw 50 that can adjust the opening allowable width L is used as the base end of the lower grip 30. In the case where an object to be welded whose opening allowable width L can be set narrow is to be processed, the welding operation can be performed easily by setting the opening allowable width L narrow. Since it is possible to cope with a welded object requiring a wide allowable opening width L by changing the permissible opening width L widely, the operability can be improved according to the size of the welded object. And the remarkable effect that versatility can be improved is produced.

  The present invention is not limited to the embodiment described above.

  For example, the welding fitting 34 may be provided on the upper grip 20 and the ultrasonic transducer 22 may be provided on the lower grip 30. That is, the first grip may be the lower grip 30 and the second grip may be the upper grip 20. The grip biasing spring 38 is not limited to a compression coil spring, and may be a torsion spring, for example. The knob 51 is not limited to a disk type but may be a lever type. The opening 55 is not limited to the base end portion, and may be open to the side portion. Alternatively, the screw hole 39 may be formed in the upper grip 20 and the adjustment screw 50 may be screwed from the upper grip 20 side toward the lower grip 30. Further, the spring seats 36A, 36B, 53 may function as receiving seats for receiving the corresponding coil springs 37, 38, 54, that is, serve as pressers for pressing the corresponding coil springs 37, 38, 54. That's fine. Specifically, like the embodiment described above, it can be continuously molded with the same member as the decorative member 35 or the knob 51. It is not always necessary to provide a separate member.

  In addition, it goes without saying that various modifications can be made without departing from the scope of the present invention.

10 Ultrasonic welder 20 Upper grip (example of first grip)
22 Ultrasonic vibrator 26 Horn 30 Lower grip (example of second grip)
33 Metal plate (example of screw hole member)
34 welding bracket 38 grip biasing spring 39 screw hole 40 shaft 50 adjusting screw 51 knob 54 coil spring (an example of an elastic member)
55 Opening L Allowable opening

Claims (6)

A first grip;
A second grip;
A shaft for rotatably connecting the first grip and the second grip;
An ultrasonic vibrator provided in the first grip;
A welding fitting provided on the second grip;
A horn that is provided in the ultrasonic vibrator and sandwiches an object to be welded between the welding hardware,
A grip biasing spring that is interposed between the first grip and the second grip and biases the first grip and the second grip in a direction in which the welding fitting and the horn are separated from each other;
A regulation means for regulating the opening allowable width of the horn and the welding fitting,
The ultrasonic welding device, wherein the restricting means is configured to be capable of adjusting the opening allowable width. The ultrasonic welder according to claim 1,
The regulating means is
In any one of the first grip and the second grip, a screw hole member provided on a proximal end side with respect to the shaft, and having a screw hole opened on the other of the first grip and the second grip;
When the first grip and the second grip are opened by screwing into the screw hole, the allowable opening width is regulated by abutting with the other base side of the first grip or the second grip. An ultrasonic welder characterized by comprising: The ultrasonic welder according to claim 2,
An ultrasonic welder further comprising an elastic member that applies a biasing force between the adjustment screw and the screw hole member. The ultrasonic welder according to claim 2 or 3,
A knob integrated with the adjusting screw;
The ultrasonic welder, wherein the knob faces outside from an opening formed in one of the first grip and the second grip. The ultrasonic welder according to claim 4, wherein
The ultrasonic welder, wherein the opening is opened at a base end portion of one of the first grip and the second grip. In the ultrasonic welder according to any one of claims 3 to 5,
The ultrasonic welder, wherein the elastic member is a conical coil spring.

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