JP2006015354A - Ultrasonic welding apparatus, correcting member for ultrasonic welding, and ultrasonic welding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique which can simply and surely weld a plurality of conductors by the ultrasonic welding in the state that the conductors are arranged along the pressing direction. <P>SOLUTION: A first guide member 30 and a second guide member 35 are arranged around the space between a tip 20 and an anvil 25 for ultrasonic welding so as to face each other, and plate shape correcting members 40A, 40B are arranged. The plate shape correcting members 40A, 40B have tilting guide side portions 41A, 41B tilting so as to gradually separate from a first guide receiving surface 30a of the first guide member 30 upward. When the second guide member 35 is moved so as to approach to the first guide member 30 in the state that respective conductors 3 are slantingly arranged along the tilting guide side portions 41A, 41B, the respective conductors 3 are arranged in the vertical direction. The ultrasonic welding for the respective conductors 3 is carried out in this state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for ultrasonic welding of conductors of electric wires.

  Conventionally, ultrasonic welding between conductors of electric wires is performed as shown in FIG. 7, for example.

  That is, first, the plurality of conductors 110 are arranged so as to be brought between the tip 132 for ultrasonic welding and the anvil 134 by the pair of guide jigs 120. Thereafter, the tip 132 and the anvil 134 are moved in proximity to each other to apply pressure and ultrasonic vibration to each conductor 110. As a result, the surfaces of the conductors 110 are rubbed together, the surfaces are cleaned, and the conductors are joined together.

  In addition, as a prior art relevant to this invention, there exists a thing of patent document 1, for example.

JP 08-31469 A

  However, in the above conventional technology, the arrangement direction of the conductors 110 is free between the chip 132 and the anvil 134 and is not regulated at all.

  For this reason, as shown to Fig.8 (a), each conductor 110 may be joined by the form (henceforth a vertically arranged form) arranged along the pressurization direction, and it shows in FIG.8 (b). As described above, the conductors 110 may be joined in a form (hereinafter referred to as a side-by-side form) arranged along a direction substantially orthogonal to the pressing direction.

  And in the form shown to Fig.8 (a), since ultrasonic vibration can be provided in the state which pressed conductors 110 strongly, comparatively strong joint strength can be obtained.

  However, in the form shown in FIG. 8B, a force that strongly presses the conductors 110 cannot be applied, so that the bonding strength is relatively weak.

  Then, this invention is providing the technique which can carry out the state ultrasonic welding which arranged the some conductor along the pressurization direction simply and more reliably.

  1st aspect of this invention is an ultrasonic welding apparatus for ultrasonically welding the conductors of an electric wire, Comprising: It is provided so that a relative approach / separation movement is possible, and ultrasonically applies them while pressing each said conductor A pair of ultrasonic welding members for welding, and a first guide member provided around the pair of ultrasonic welding members and having a first guide receiving surface along a pressing direction of the pair of ultrasonic welding members And a second guide member having a second guide receiving surface that faces the first guide receiving surface in a substantially parallel posture and is relatively movable toward and away from the first guide receiving surface. A correction member having an inclined guide portion that is inclined so as to be gradually separated from the first guide receiving surface, and the conductors are arranged on the inclined guide portion between the first guide member and the second guide member. In the state of being disposed along the second guide Receiving surface by that to close toward the first guide receiving surface, the one in which the conductors are arranged along said pressing direction between the pair of ultrasonic welding member.

  In this case, the correction member has an inclined guide side portion that is inclined so as to be gradually separated from the first guide receiving surface, and is disposed so as to sandwich a space between the pair of ultrasonic welding members. It may be constituted by a pair of plate-like correction members.

  Further, the first guide receiving surface intersects with the welding surfaces of the pair of ultrasonic welding members, and the inclined guide portion or the inclined guide side portion includes the first guide receiving surface and the pair of ultrasonic welding. It may be formed in the shape which inclines so that it may gradually separate from the said 1st guide receiving surface from the part where the welding surface of a member crosses.

  Moreover, the 2nd aspect of this invention is the correction member for ultrasonic welding used for the ultrasonic welding apparatus which ultrasonically welds them while pressing the conductors of several electric wires between a pair of ultrasonic welding members. Then, an inclined guide portion that is inclined obliquely with respect to the pressing direction by the pair of ultrasonic welding members is provided.

  Furthermore, the third aspect of the present invention is an ultrasonic welding method in which conductors of electric wires are ultrasonically welded to each other, and (a) the pair of ultrasonic welding members is inclined with respect to the pressurizing direction by them. A step of arranging a plurality of electric conductors in the direction; and (b) after the step (a), bringing the conductors between a pair of ultrasonic welding members and arranging the conductors along the pressing direction. (C) After the step (b), a step of ultrasonically welding the conductors while pressing the conductors between the pair of ultrasonic welding members is provided.

  According to the first aspect of the present invention, it is provided with the correction member having the inclined guide portion that is inclined so as to be gradually separated from the first guide receiving surface, and each of the conductors includes the first guide member and the second guide. With the second guide receiving surface approaching the first guide receiving surface in a state of being disposed along the inclined guide portion between the members, the conductors are disposed between the pair of ultrasonic welding members. Since it arranges along the said pressurization direction, it can ultrasonically weld in the state which arranged the several conductor along the pressurization direction simply and more reliably. Further, since the inclined guide portion is inclined so as to be gradually separated from the first guide receiving surface, conductors having various diameters are arranged along the inclined guide portion between the first guide member and the second guide member. And can be ultrasonically welded.

  Further, the correction member has an inclined guide side part that is inclined so as to be gradually separated from the first guide receiving surface, and a pair of the correction members disposed so as to sandwich a space between the pair of ultrasonic welding members. When the plate-like straightening member is used, the conductors or the electric wires are supported on both sides of the pair of ultrasonic welding members, and the conductors can be arranged in a predetermined oblique direction.

  Further, the inclined guide portion or the inclined guide side portion is gradually separated from the first guide receiving surface starting from a portion where the first guide receiving surface and a welding surface of the pair of ultrasonic welding members intersect. If it is formed in a shape that inclines, the conductors can be arranged in a predetermined oblique direction even if they are relatively thin conductors, and it is possible to deal with conductors of various diameters.

  According to the second aspect of the present invention, since the inclined guide portion that is inclined obliquely with respect to the pressurizing direction by the pair of ultrasonic welding members is provided, each conductor is arranged along the inclined guide portion. By bringing the conductors between the pair of ultrasonic welding members, the conductors are arranged between the pair of ultrasonic welding members along the pressing direction. For this reason, the conductors can be ultrasonically welded in a state where a plurality of conductors are arranged along the pressurizing direction in a simple and more reliable manner.

  Moreover, since the inclination guide part inclines diagonally with respect to the pressurization direction, it can respond | correspond to the conductor with various diameters.

  According to the third aspect of the present invention, after arranging the conductors of the plurality of electric wires between the pair of ultrasonic welding members in the direction inclined with respect to the pressurizing direction by them, the conductors are connected to the pair of supersonic welding members. Arranged along the pressurizing direction between the sonic welding members, and then, ultrasonically welding them while pressing the conductors between the pair of ultrasonic welding members, more easily and more reliably, The conductors can be ultrasonically welded with a plurality of conductors arranged in the pressurizing direction.

  Hereinafter, an ultrasonic welding apparatus according to an embodiment of the present invention will be described.

  FIG. 1 is a perspective view showing an ultrasonic welding apparatus, and FIG. 2 is an explanatory view showing a main part of the ultrasonic welding apparatus.

  This ultrasonic welding apparatus 10 is an apparatus for ultrasonic welding the conductors 3 (see FIGS. 3 to 6) of a plurality of electric wires 2, and includes a tip 20 and an anvil 25 as a pair of ultrasonic welding members, A first guide member 30 and a second guide member 35 for disposing each conductor 3 between the chip 20 and the anvil 25, and plate-like correction members 40A and 40B for correcting the conductors 3 in a predetermined direction. And.

  The tip 20 and the anvil 25 are provided so as to be relatively close to and away from each other, and each conductor 3 is sandwiched between them to apply ultrasonic vibration while being pressed, thereby ultrasonicating the conductors 3 with each other. Join by welding.

  More specifically, the tip 20 is formed on a member having a predetermined welding surface 20a. The tip 20 is fixed to the upper end of one end of the apparatus housing 12 with the welding surface 20a facing upward.

  The chip 20 is connected to a horn 14 disposed in the apparatus housing 12. Then, ultrasonic vibration (for example, 20 kHz) generated by a predetermined ultrasonic vibrator is transmitted to the chip 20 via the horn 14.

  The anvil 25 is formed in a substantially rectangular parallelepiped shape having a predetermined welding surface 25a. The anvil 25 has a movable support bracket 13 attached to the upper end of one end of the apparatus housing 12 in a posture in which the welding surface 25a faces downward, that is, a posture in which the welding surface 25a faces the welding surface 20a. And disposed so as to be movable up and down above the chip 20.

  Further, the anvil 25 is configured to be driven close to and away from the chip 20 (up and down driving in this case) by a pressurizing mechanism 29 including an actuator 27 such as an air cylinder and a power transmission mechanism 28 thereof.

  In a state where the anvil 25 is separated from the chip 20 (a state in which the anvil 25 is disposed at the upper position, see FIG. 3), a space in which each conductor 3 can be easily disposed is formed between the chip 20 and the anvil 25. Is done. On the other hand, in a state where the anvil 25 is close to the chip 20 (a state where the anvil 25 is disposed in a lower position, see FIG. 5), each conductor 3 is sandwiched between the chip 20 and the anvil 25 under a predetermined pressure. It has become.

  In the present embodiment, the anvil 25 is slidably movable with respect to the first guide receiving surface 30a of the first guide member 30 described later by the movable support bracket 13 and is urged in the protruding direction. It is supported. And according to the movement of the 2nd guide member 35 mentioned later, the one end part of the anvil 25 contact | abuts to the 2nd guide receiving surface 35a, and it retracts. Thereby, the protrusion dimension of the anvil 25 from the 1st guide receiving surface 30a can be adjusted now according to the diameter etc. of each conductor 3 used as welding object.

  The 1st guide member 30 and the 2nd guide member 35 are arrange | positioned in the position which pinches | interposes the space formed between the said chip | tip 20 and the anvil 25 from both sides.

  The first guide member 30 has a first guide receiving surface 30a along a pressing direction A by the tip 20 and the anvil 25 (here, the pressing direction A by the anvil 25), and the second guide member 35. Has a second guide receiving surface 35a along the pressing direction A. The first guide receiving surface 30a and the second guide receiving surface 35a are arranged so as to be substantially parallel to each other and to face each other with the space between the tip 20 and the anvil 25 interposed therebetween. The second guide receiving surface 35a is configured to be movable toward and away from the first guide receiving surface 30a by the movement of the second guide member 35.

  More specifically, the 1st guide member 30 is formed in the substantially rectangular parallelepiped member by which the one side was made into the 1st guide receiving surface 30a. The first guide member 30 is positioned above the one side of the chip 20 via the movable support bracket 13 with the first guide receiving surface 30a facing the space between the chip 20 and the anvil 25. It is supported below 25 so as to be movable up and down. Further, the first guide member 30 is configured to move up and down together with the anvil 25 while the first guide receiving surface 30 a is slidably contacted with one side surface of the chip 20 by driving the pressurizing mechanism 29.

  The second guide member 35 is formed as a substantially rectangular parallelepiped member having one side surface serving as a second guide receiving surface 35a. The second guide member 35 is positioned at one end of the device housing 12 with the second guide receiving surface 35a facing the first guide receiving surface 30a with the space between the chip 20 and the anvil 25 interposed therebetween. It is supported on the side upper part so as to be movable toward and away from the first guide member 30.

  The second guide member 35 is horizontally driven by a horizontal drive mechanism 39 including an actuator 37 such as an air cylinder and its power transmission mechanism 38. In other words, the second guide member 35 is moved toward and away from the first guide member 30 while the lower surface of the second guide member 35 is in sliding contact with the upper surface (including the welding surface 20a) of the chip 20 by driving the horizontal drive mechanism 39. It is configured.

  Then, in a state where the second guide member 35 is separated from the first guide member 30 (a state where the second guide member 35 is disposed at a separation position, see FIG. 3), the first guide member 30 and the second guide member 35 are each While a space in which the conductor 3 can be easily disposed is formed, the first guide member 35 is close to the first guide member 30 side (a state in which the conductor 3 is disposed in the proximity position, see FIG. 4). A gap is formed between the guide receiving surface 30a and the second guide receiving surface 35a to such an extent that the conductor 3 can be disposed in a state where the conductors 3 are arranged along the pressing direction A. Note that the width of the gap is configured to be appropriately adjustable according to the diameter of the conductor 3.

  As described above, when the second guide member 35 moves close to the first guide member 30 side, the second guide receiving surface 35a contacts the anvil 25 and pushes it in the retracting direction. Therefore, the anvil 25 protrudes from the second guide receiving surface 30a by a gap formed between the first guide receiving surface 30a and the second guide receiving surface 35a.

  The plate-like correction members 40A and 40B have inclined guide side portions 41A and 41B that are inclined so as to be gradually separated from the first guide receiving surface 30a.

  Specifically, the pair of plate-like correction members 40A and 40B are arranged at positions where the space between the tip 20 and the anvil 25 is sandwiched from a direction different from that of the first and second guide members 30 and 35. It is fixed to the body 12.

  The plate-like correction member 40A is, for example, a member obtained by cutting out a part of a substantially square plate shape into a substantially triangular shape, and the inclined guide side portion 41A is formed with the oblique sides cut out in the triangular shape. Further, the plate-like correction member 40B is a member formed in a substantially triangular plate shape, for example, and the inclined guide side portion 41B is formed with the oblique side of the triangle shape. More specifically, the inclined guide side portions 41A and 41B are opposite to the pressing direction A (upward) when observed from a direction orthogonal to the pressing direction A and the moving direction B of the second guide member 35. The first guide receiving surface 30a is formed on a linear hypotenuse that gradually separates from the first guide receiving surface 30a.

  Further, when these inclined guide side portions 41A and 41B are observed from a direction orthogonal to the pressurizing direction A and the moving direction B, the first guide starts from a portion where the first guide receiving surface 30a and the welding surface 20a intersect. The shape is inclined so as to be gradually separated from the receiving surface 30a.

  Then, the second guide receiving surface 35a is arranged in a state where the conductors 3 are arranged along the inclined guide side portions 41A and 41B along the oblique direction between the first guide member 30 and the second guide member 35. When approaching toward the first guide receiving surface 30a, the conductors 3 are arranged along the pressing direction A between the first guide receiving surface 30a and the second guide receiving surface 35a.

  In addition, each plate-shaped correction member 40A, 40B is arrange | positioned in the position which left | separated from the chip | tip 20 and the anvil 25 to the side so that it might not become a hindrance of the ultrasonic welding by the chip | tip 20 and the anvil 25 (FIG. 2 to 6 are shown in a position close to the chip 20 for convenience of explanation).

  In the ultrasonic welding apparatus 10, the operation control of the pressurizing mechanism 29, the horizontal drive mechanism 39, and the like is performed according to the operation command of the control unit 45. The operation of the ultrasonic welding apparatus 10 will be described as follows.

  First, in the initial state, as shown in FIG. 2, the anvil 25 is disposed at an upper position, and the second guide member 35 is disposed at a position separated from the first guide member 30. In this state, spaces in which the respective conductors 3 can be disposed are formed between the chip 20 and the anvil 25 and between the first guide member 30 and the second guide member 35. Further, a gap through which each conductor 3 can be inserted is formed between one end of the anvil 25 and the second guide member 35.

  And the coating | coated part of the electric wire 2 is partially peeled, and the conductor 3 is exposed over predetermined length. In this way, a plurality (two in this case) of the electric wires 2 with the conductors 3 exposed are prepared. Then, as shown in FIG. 3, each conductor 3 is passed through the gap between the one end portion of the anvil 25 and the second guide member 35, and the chip 20, the anvil 25, the first guide member 30, and the second guide member. It is introduced into the space surrounded by 35. Then, each conductor 3 or a covering portion in the vicinity thereof is disposed on the inclined guide side portions 41A and 41B, and the conductors 3 are arranged along the extending direction of the inclined guide side portions 41A and 41B. Set up. In addition, the operation | work which sets each conductor 3 in the ultrasonic welding apparatus 10 in this way is performed by an operator's manual work or an automatic conveyance robot etc., for example.

  Then, after setting each conductor 3 as described above, for example, when the operator operates a switch (not shown) to input a predetermined activation signal, as shown in FIG. The second guide member 35 moves to the first guide member 30 side, that is, in a predetermined movement direction B. At this time, the conductors 3 are arranged on the inclined guide sides 41A and 41B so as to be displaced in the vertical direction substantially orthogonal to the moving direction B of the second guide member 35. For this reason, the conductors 3 are shifted between the first guide receiving surface 30a and the second guide receiving surface 35a while being displaced in the vertical direction, and are arranged in the vertical direction (pressing direction A).

  Thereafter, as shown in FIG. 5, the anvil 25 and the first guide member 30 are moved in a predetermined pressing direction A (downward) by driving the pressing mechanism 29. Then, each conductor 3 is pinched | interposed between the chip | tip 20 and the anvil 25, with being arranged along the up-down direction (pressurization direction A). Then, with this vertical arrangement, ultrasonic vibration is applied to each conductor 2 under a predetermined pressure, and both conductors 3 are joined by ultrasonic welding.

  Finally, the anvil 25 and the first guide member 30 are moved upward (in the −A direction) by driving the pressure mechanism 29, and the second guide member 35 is moved by the horizontal drive mechanism 39. When the electric wire 2 which is a workpiece in which the conductors 3 are ultrasonically welded is taken out from the wire 3 in a direction away from the wire (−B direction), the ultrasonic welding operation is completed.

  The ultrasonic welding apparatus 10 configured as described above includes plate-like correction members 40A and 40B having inclined guide side portions 41A and 41B that are inclined so as to be gradually separated from the first guide receiving surface 30a. The second guide receiving surface 35a is disposed between the first guide member 30 and the second guide member 35 in a state where the conductors 3 are arranged obliquely along the inclined guide side portions 41A and 41B. The conductors 3 are arranged along the pressing direction A between the chip 20 and the anvil 25 by being brought close to the receiving surface 30a.

  Therefore, in a state where a plurality of conductors 3 are arranged along the pressing direction A in a simple and more reliable manner, the conductors 3 can be ultrasonically welded with a relatively strong bonding strength.

  In other words, particularly when two conductors 3 are joined together, joining in the side-by-side configuration shown in FIG. 8 (b) is prevented, and joining is more reliably performed in the side-by-side configuration shown in FIG. 8 (a). It is possible to improve the reliability of the joint portion between the conductors 3. In addition, the conductors 3 can be arranged in a vertical arrangement in a simple and more reliable manner without depending on the degree of experience or proficiency of the operator.

  In addition, since the inclined guide side portions 41A and 41B are inclined so as to be gradually separated from the first guide receiving surface 30a, the inclined guide side portions 41A and 41B are not limited to the conductor 3 having a specific diameter, and the conductors 3 having various diameters are used. Further, there is an advantage that ultrasonic welding can be performed in a state of being arranged along the inclined guide side portions 41A and 41B and arranged along the pressing direction A.

  In addition, the inclined guide side portions 41A and 41B are formed in a shape that is inclined so as to be gradually separated from the first guide receiving surface 30a, starting from a portion where the first guide receiving surface 30a and the welding surface 20a intersect. Therefore, even if the conductors 3 are relatively thin, the conductors 3 can be arranged in a predetermined oblique direction, and can correspond to conductors 3 of various diameters (particularly, small diameters).

  In addition, since each conductor 3 is held in a predetermined oblique position by the pair of plate-like correction members 40A and 40B disposed so as to sandwich the space between the chip 20 and the anvil 25, the chip The conductor 3 or the electric wire 2 can be supported outside the both sides 20 and the anvil 25 so as to be arranged in a predetermined oblique direction. Thereby, it can prevent that installation of plate-shaped correction member 40A, 40B obstructs operation | movement of the chip | tip 20, the anvil 25, the 1st guide member 30, and the 2nd guide member 35. FIG.

  In addition, although this embodiment demonstrated the case where the two conductors 3 were ultrasonic-welded, it is applicable similarly also when three or more conductors 3 are ultrasonic-welded.

  Further, as the inclined guide portions for arranging the respective conductors 3 in a predetermined oblique direction, the inclined guide portions 41A and 41B are configured by the oblique sides of the plate-like member, as well as a three-dimensional inclined surface. It may also be configured by arranging linear or rod-like members obliquely.

  Further, in the present embodiment, the second guide member 35 is moved to the first guide member 30 side. However, on the contrary, the first guide member 30 is moved, or the first guide member 30 is moved. And the structure which both the 2nd guide members 35 move may be sufficient.

  Further, the positional relationship between the chip 20 and the anvil 25 may be upside down with respect to the above-described embodiment, and either or both of them may move.

1 is a perspective view showing an ultrasonic welding apparatus according to an embodiment of the present invention. It is explanatory drawing which shows the principal part of an ultrasonic welding apparatus same as the above. It is explanatory drawing which shows the process which set the conductor to the ultrasonic welding apparatus same as the above. It is explanatory drawing which shows the process which arranged each conductor in the vertical direction in the ultrasonic welding apparatus same as the above. It is explanatory drawing which shows the process of ultrasonically welding each conductor in an ultrasonic welding apparatus same as the above. It is explanatory drawing which shows the process after ultrasonic welding in an ultrasonic welding apparatus same as the above. It is explanatory drawing which shows the example of ultrasonic welding which concerns on a prior art example. FIG. 8A and FIG. 8B are explanatory diagrams showing conventional problems.

Explanation of symbols

2 Electric wire 3 Conductor 10 Ultrasonic welding apparatus 20 Tip 25 Anvil 30 First guide member 30a First guide receiving surface 35 Second guide member 35a Second guide receiving surface 40A, 40B Plate-shaped correction member 41A, 41B Inclined guide side A Pressure direction

Claims (5)

An ultrasonic welding device for ultrasonic welding of conductors of electric wires,
A pair of ultrasonic welding members that are relatively movable and can be moved away from each other, and ultrasonically weld them while pressurizing the conductors;
A first guide member provided around the pair of ultrasonic welding members and having a first guide receiving surface along a pressing direction of the pair of ultrasonic welding members;
A second guide member having a second guide receiving surface opposed to the first guide receiving surface in a substantially parallel posture and relatively movable toward and away from the first guide receiving surface;
A correction member having an inclined guide portion that is inclined so as to be gradually separated from the first guide receiving surface;
With
The second guide receiving surface is brought close to the first guide receiving surface in a state where the conductors are disposed along the inclined guide portion between the first guide member and the second guide member. The ultrasonic welding apparatus, wherein the conductors are arranged along the pressing direction between the pair of ultrasonic welding members. The ultrasonic welding apparatus according to claim 1,
The correction member has an inclined guide side portion that is inclined so as to be gradually separated from the first guide receiving surface, and a pair of plates disposed so as to sandwich a space between the pair of ultrasonic welding members Ultrasonic welding apparatus composed of a straightening member. The ultrasonic welding apparatus according to claim 1 or 2,
The first guide receiving surface intersects a welding surface of the pair of ultrasonic welding members, and the inclined guide portion or the inclined guide side portion is formed between the first guide receiving surface and the pair of ultrasonic welding members. An ultrasonic welding apparatus that is formed in a shape that is inclined so as to gradually separate from the first guide receiving surface, starting from a portion where the welding surfaces intersect. A straightening member for ultrasonic welding used in an ultrasonic welding apparatus for ultrasonically welding the conductors of a plurality of electric wires between a pair of ultrasonic welding members,
A correction member for ultrasonic welding, comprising an inclined guide portion inclined obliquely with respect to a pressing direction by the pair of ultrasonic welding members. An ultrasonic welding method for ultrasonically welding conductors of an electric wire,
(A) arranging a plurality of electric wire conductors in a direction inclined with respect to the pressurizing direction between the pair of ultrasonic welding members;
(B) after the step (a), the step of bringing the conductors between a pair of ultrasonic welding members and arranging the conductors along the pressing direction;
(C) After the step (b), the step of ultrasonically welding the conductors while pressing the conductors between the pair of ultrasonic welding members;
An ultrasonic welding method comprising:

Images