JP3266033B2 - Ultrasonic stapler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ultrasonic stapler, and more particularly, to an ultrasonic stapler suitable for hand-held work.

[0002]

2. Description of the Related Art FIG. 11 shows a conventional example. In the conventional example (ultrasonic stapler 100) shown in FIG. 11 , an ultrasonic vibrator 101 for oscillating ultrasonic vibration, a horn 102 for amplifying the ultrasonic vibration, and these are integrally held at one end thereof. And a pressurizing surface 10 which rotatably engages with the other end of the upper frame 103 and faces the tip end side surface of the horn portion 102 at the pivotal end.
Lower frame 10 having chip 104 with 4A
5 is provided. Further, the conventional ultrasonic stapler 100 shown in FIG. 10 covers the upper frame 103 and the lower frame 105 individually from the outside and faces the upper frame 1 with the upper frame 103 and the lower frame 105 facing each other.
03 and two covers 106 and 107 having a U-shaped cross section, respectively, provided on the lower frame 105 and a switch 108 for switching between driving and stopping the ultrasonic transducer 101.
And a plurality of connection lines L for connecting the ultrasonic transducer 101 and the switch 108 to an external ultrasonic oscillator (not shown).

The above-described upper frame 103 and lower frame 105 are each formed in a U-shaped cross section, and both have parallel side walls facing each other from the bottom surface. The interval between the side walls is set wider in the upper frame 103, and the inner surface of each side wall of the upper frame 103 and the outer surface of each side wall of the lower frame 105 are uniformly contacted with each side wall in a state where they are in contact with each other. The connecting pin 109 is inserted into the through hole provided, and the upper frame 103 and the lower frame 105 are connected at the right end in FIG. 10 and are freely rotatable.

Here, the connecting pin 109 is a torsion coil spring 110 (not shown in FIG. 11) for rotating the lower frame 105 relative to the upper frame 103 in a direction in which the tip 104 is separated from the side surface of the tip of the horn portion 102. Is also held.

[0005] Reference numeral 111 denotes a cord bush, which has a tubular structure through which each connection line L is inserted uniformly, and an engagement groove 111 perpendicular to the cord insertion direction is formed on the outer peripheral surface thereof.
A is formed, and the cover 10 is
6 fixed.

The switch 108 is connected to the lower frame 105.
The lead switch mounted on the top
A, a main body 108B having an insertion hole into which the push button 108A can be inserted, one connection terminal 108C provided on the main body side facing surface of the push button 108A, and a corresponding one provided inside the main body 108B. Other connection terminal 10
8D and a return spring (not shown) for applying a return force to the push button 108A. And push button 108
The connection terminals 108C and 108D come into contact with each other by pressing A, and a current flows between the connection terminals 108C and 108D.

The ultrasonic stapler 100 has a processing surface 102A on a side surface near the tip of a horn portion 102, and a workpiece is sandwiched between the processing surface 102A and the pressing surface 104A by ultrasonic welding. I do. That is, the lower frame 105 is pulled toward the upper frame 103 side, and the workpiece is processed through the pressurized surface 104A.
And the lower frame 10
The switch 108 provided on the lower frame 105 side is pressed separately from the operation of pulling the ultrasonic transducer 5 to drive the ultrasonic transducer 2. Since the processing surface 102A is formed on the side surface of the horn portion 102 (that is, the direction along the vibration direction T of the ultrasonic vibration transmitted through the horn portion 102 ) , the workpiece is slid by vibration in the same direction. The welding is performed by heat melting by dynamic friction.

[0008]

However , the above-mentioned prior art has a disadvantage that the operation of pressing the switch 108 is required separately from the operation of pulling the lower frame 105 during the processing operation, which is complicated. I was In addition, since an independent pressing operation of the switch is required, the operator must hold the ultrasonic stapler in his hand while keeping the switch in a state where the switch can be pressed, and the operator is limited in how to hold the ultrasonic stapler. Was added, and the operability was reduced.

[0009]

THE INVENTION The object of the invention is to improve the disadvantages of the prior examples that written, in particular, to provide a good operability ultrasonic stapler, and an object.

[0010]

Means for Solving the Problems To achieve the above object,
According to the first aspect of the present invention, one and the other two rotating members opposing each other and rotatably connected at one end of each other, an ultrasonic vibrator that oscillates ultrasonic vibration, and a horn portion having a working surface on its distal end amplifies the ultrasonic vibration, as well as equipped integrally ultrasonic vibrator and horn section in the turning end portion of one of the rotating member, the other times the dynamic member, by the rotation of those the pivoting member on the turning end portion
A chip having a pressurized surface that comes into contact with the above-described processed surface is provided.

The other rotating member is provided near its rotating end so as to be retractable by a predetermined rotational force in a direction in which the above-mentioned processing surface and the pressing surface come into contact with each other. The receiving portion is provided with a chip . Then, behind the receiving portion, said switch for driving the ultrasonic vibrator to closed by retraction of the receiving portion is adopted a structure that is equipped.

[0012] In such a configuration, it urges the rotating force to the other of the rotary member by pulling the other rotating member to one of the rotating member side of the distal end portion of the horn unit a workpiece processed surface and pressing The workpiece is sandwiched between the pressing surface and the workpiece to be effectively brought into contact with the processing surface. Thereafter, the additional rotation power is applied to the other rotation.
When added to the moving member, the receiving part moves backward (the switch part
Forward) and the switch behind it is closed (pressed
). Thereby, the ultrasonic vibrator starts driving. Or
The ultrasonic vibrations are amplified in the horn and
Ultrasonic vibration is transmitted to the workpiece and melts into the workpiece
, Which results in welding.

According to the second aspect of the present invention, the receiving portion includes a chip holding member for holding the chip at one end, a tip holding member for holding the other end of the chip holding member, and a second end for the other end. And a leaf spring supported on the connecting portion side of the rotating member.
Therefore, according to the second aspect of the present invention, in addition to the function equivalent to the first aspect of the present invention, the pressing surface comes into contact with the processing surface on the horn portion side after the other rotating member rotates. Then, the chip holding member of the receiving portion bends downward, for example, in FIG. 1 against the spring force of the leaf spring , and retreats the chip holding member. As a result, the switch behind the switch is pressed to close the circuit. On the other hand, when there is no rotational power to the other rotating member, the other rotating member returns to its original position (for example, FIG. 1).
), The tip holding member is released from the spring force of the leaf spring, and the switch is opened.

With the above arrangement , the above-mentioned object is achieved.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIGS.

[0016] In the embodiment shown in FIGS. 1 through 10,
Facing each other, it is rotatably connected with each other at one end one
One and the other two rotating members 40 and 50, an ultrasonic vibrator 2 that oscillates ultrasonic vibration, and a horn portion 3 that amplifies the ultrasonic vibration and has a processing surface 31 at its tip.
Have. Also, the turning end portion of one of the rotating member 40, the ultrasonic transducer 2 and the horn unit 3 together with the equipped integrally to the other of the rotary member 50, those該回at its rotational end portion A tip 51 having a pressing surface 51A that comes into contact with the processing surface 31 by the rotation of the moving member 50 is provided . Furthermore, other
The turning member 50 is located near its turning end as shown in FIG.
At the side, the above-mentioned processing surface 31 and the pressing surface 51A come into contact with each other.
Equipped to be able to retreat freely by urging a predetermined rotational force in the direction.
The receiving portion 56 is provided. As described above,
Chip 51 is provided. And this receiving part 5
6 and closed by the retreat of the receiving portion 56
Switch 52 for driving the ultrasonic transducer
You.

Here, the rotating member 40 is mainly composed of the upper frame 4 and the upper cover 6 provided so as to cover the upper frame 4 from above. The rotating member 50 mainly includes the lower frame 5 and the lower cover 7 provided so as to cover the lower frame 5 from below.

Hereinafter, this will be described in more detail.

First, the ultrasonic transducer 2 and the horn 3 will be described. The ultrasonic vibrator 2 is of a small size that is integral with the horn 3 and is used in the vertical direction in FIG. And the overall length is short and miniaturized.

The ultrasonic vibrator 2 includes a ceramic ring 21 disposed in contact with an upper end of the horn 3 (an end opposite to the processing surface 31), and electrodes disposed sequentially above the ceramic ring 21. It comprises a plate 22, a ceramic ring 23, an electrode plate 24, a tail mass 25, and embedded bolts (not shown) for integrally fastening and fixing these together with the horn portion 3. Each configuration of these ultrasonic transducers 2 is uniformly set to have substantially the same outer diameter, and when integrally fixed, a cylindrical shape having a uniform outer diameter is formed.

The two electrode plates 22 of the ultrasonic vibrator 2
24 has connection terminals protruding along its radial direction, to which lead wires L1 and L2 are connected, respectively, and further outside the ultrasonic stapler 10 via each lead wire L1 and L2. It is connected to an ultrasonic oscillator T ( see FIG. 3). When a voltage having a predetermined oscillation frequency is applied from the ultrasonic oscillator T, ultrasonic vibration is generated from the ultrasonic transducer 2. This ultrasonic vibration is transmitted to the horn 3 and amplified, and the processed surface 31 vibrates in a direction perpendicular to the processed surface 31.

The horn 3 has a processing surface 31 formed in a flat shape at the lower end in FIG. 1, and a cylindrical portion 32 having a relatively small diameter and a cylindrical portion 34 having a relatively large diameter have a substantially conical shape. A flange 35 having a flange shape is provided between the large cylindrical portion 34 and the ceramic ring 21 of the ultrasonic vibrator 2 and is connected to each other through an intermediate portion 33 formed by the intermediate portion 33. The diameter of the large cylindrical portion 34 is set to a size equal to the outer diameter of the ultrasonic transducer 2 above.

The ultrasonic vibrator 2 and the horn 3 are of an integral type as described above, and the flange 35 is provided at a position substantially in the middle of the total length of the ultrasonic transducer 2 and the horn 3. Then, as shown in FIG. 2, the ultrasonic transducer 2 and the horn portion 3 upper frame 4 by the flange 35
Therefore, the ultrasonic vibrator 2 and the horn 3 are well-balanced up and down with the flange 35 as a boundary, so that the influence of vibration due to disturbance can be eliminated and ultrasonic welding can be performed well.

The horn portion 3 has a processing surface 31 formed perpendicular to the center axis direction thereof. When welding is performed, ultrasonic vibration is applied by the ultrasonic vibrator 2 in the center axis direction. The vibration is transmitted and vibrates the processing surface 31 in the vertical direction. In other words, the entire processing surface 31 transmits ultrasonic vibration to the workpiece by repeating continuous pressing,
As a result, the workpiece is melted and welded.

Furthermore, the horn unit 3, generally formed of aluminum (aluminum 7075 used), also smaller cylindrical portion 32 of the horn unit 3, including the working surface 31 from the distal end 4 of the [mm] 40 [μ] on the surface up to the position
m] hard anodized (for example, manufactured by Miyaki Group: using the trademark “KASHIMA COAT”).

For this reason, the weight of the entire horn 3 is reduced, and further, the hardness of the tip of the horn 3 is improved, and the corrosion resistance and the lubricity are improved. In particular, this horn part 3
Is difficult to replace because it is integrated with the ultrasonic vibrator 2, but the high hardness increases the wear resistance of the tip of the horn part 3 and extends the life, thereby complicating the replacement. Is eliminated. In addition , it is possible to prevent a shift in the oscillation frequency of the ultrasonic wave and a decrease in output due to wear of the tip. Furthermore, the horn 3
Prevents corrosion at the tip of the shaft, prolongs the service life, prevents the output from decreasing due to corrosion, etc., and improves the lubricity to effectively prevent the adhesion of the melted workpiece. It became possible .

Next, the upper frame 4 and the lower frame 5 will be described. Upper frame 4 described above
And the lower frame 5 both have a side wall 4 on one end side.
D, 4E and side walls 5D, 5E, and the cross section of each end is mainly formed from a metal plate which is bent into a substantially U-shape, with the U-shaped openings facing each other. At the end, the connecting pin 11 is rotatably connected with the connecting pin 11 as a turning fulcrum.

As shown in FIG. 2, the upper frame 4 is provided with a through hole 41 for holding the horn portion 3 which penetrates the plate surface in the vertical direction in the vicinity of the turning end.
The through hole 41 has an inner diameter that is set to be larger than the outer diameter of the large cylindrical portion 34 of the horn portion 3 and smaller than the outer diameter of the flange 35, and is a square rubber insertion member having an insertion hole in the center. The horn part 3 is inserted from the front end side via 43. Then, the fixing bracket 42 clamps the flange 35 from above, and the horn 3 and the ultrasonic vibrator 2
Is fixed such that the center axes of the ultrasonic transducer 2 and the horn 3 are perpendicular to the flat surface of the upper frame 4.

Here, as shown in FIG. 4, the fixing bracket 42 is provided with a circular hole 42A at the center of a square metal plate whose length of each side is substantially equal to the width of the upper frame 4. A cutout 42B is formed from a part of the circumference of the hole 42A toward the outside. Since the fixing bracket 42 fixes the ultrasonic oscillator 2 and the horn 3 to the upper frame 4 with the ultrasonic oscillator 2 inserted into the circular hole 42A from above, the electrode plate Notches 42B slightly wider than the connection terminals are provided so that the connection terminals 22 and 24 and the lead wires L1 and L2 connected thereto do not hinder insertion. Therefore, the mounting of the fixing bracket 42 is facilitated, and the productivity of the ultrasonic stapler 10 can be improved.

[0030] Also, notches for 42B is provided, fixing the diameter l ₃ of the circular hole 42A of the bracket diameter as the connection terminals of the electrode plates 22, 24 Total length of size l ₂
There is no need to make the electrode plate larger than (FIG. 4B), and the electrode plate can be set to a size between the outer diameters l ₁ and l ₂ (l
₁ > l ₃ > l ₂ ), and in particular, the diameter l _{3 of the} circular hole 42A is set to l ₁
By setting substantially equal to, the size of the circular hole 42A can be set smaller. Furthermore ,
Accordingly, the outer diameter of the flange 35 of the horn portion 3 can be made smaller (because the outer diameter of the flange 35 needs to be at least larger than the diameter of the circular hole 42A). The width can be further reduced, and the entire ultrasonic stapler 10 can be reduced in size.

Reference numerals 42C, 42D, 42C in FIG.
42E and 42F are screw holes provided at each corner of the square fixing bracket, and these are inserted through insertion holes provided at respective corresponding positions around the through hole 41 of the upper frame 4. Each screw is screwed to the set screw 42a. That is, the fixing bracket 42 is fixed to the upper frame 4 by screws from all sides.

At this time, since one side of the square shape of the fixing bracket 42 is divided by the notch 42B, the flange 35 of the horn portion 3 has three flanges corresponding to the remaining sides of the fixing bracket 42. The horn portion 3 is held between the points, and is held in a more stable state.

Each of the above-described lead wires L1 and L2 and a later-described one.
L3 and L4 connected to the limit switch 52 are supersonic
Outside the stapler 10
All of these are contained at once and up to the ultrasonic oscillator T
It is wired between.

[0034] In its, and each lead wire L1, L2, L
3 and L4 are connected to the ultrasonic oscillator T by a connector K provided at the end of the code line C on the ultrasonic oscillator T side.

Of these, the opposite end of the code line C is fixed by a holder 46 near the end of the upper frame 4 on the side of the pivot. The holding tool 46 is mounted on a surface (a lower surface in FIG. 1) of the upper frame 4 facing the lower frame 5 by screwing, and lead wires L3 and L4 are connected to the lower frame 5 from the end of the cord C. Are wired and connected to the limit switch 52 along the lower surface of the lower frame 5 through a rubber and annular cord bush 54 provided in a wiring through hole 53 provided therethrough .

The lead wires L1 and L2 are connected to the upper
Equipped in the wiring through hole 47 provided through the frame 4
Through the rubber and annular cord bush 48
Along the upper surface of the upper frame 4 to the ultrasonic transducer 2
Wired.

Next, the lower frame 5 will be described. The lower frame 5 includes a connecting portion 55 rotatably connected to the upper frame 4 and the connecting pin 11,
It mainly comprises a receiving portion 56 connected to the rotating end of the connecting portion 55.

The connecting portion 55 is formed in a substantially U-shaped cross section as described above, and has two side walls 5D (not shown in FIG. 1) and 5E facing each other in a parallel state. The lower surface of the connecting portion 55 is directed to the lower frame 5 provided on the lower cover 7 such that the lower frame 5 and the lower cover 7 are separated from each other at substantially uniform intervals over the entire longitudinal direction. Are connected by screws at the projections 7F and 7G. Such lower cover 7
Are in contact only at the pivot point of the lower frame 5, that is, at the connecting portion 55 side, and are not in contact at the pivot end side, that is, at the receiving portion 56 side. Therefore, the receiving portion 56 is provided with the lower cover 7.
In contrast, it is floating in the air at a certain distance.

The receiving portion 56 is provided with a chip holding member 56A for holding the chip 51 having the pressing surface 51A formed on the processing surface 31 of the horn portion 3 described above, and a connecting portion 55 for connecting the chip holding member 56A. Leaf spring 5 connected to
6B.

The leaf spring 56B normally supports the chip holding member 56A such that a gap of a predetermined distance is formed between the chip holding member 56A and the lower cover 7 described later. When the pressing surface 51A of the tip 51 comes into contact with the processing surface 31 of the horn portion 3 and further rotating power is applied to the rotating member 50, the rotating end portion is bent downward. , Chip holding member 56
A can be freely moved backward (moved to the lower cover 7 side).

The chip holding member 56A of the receiving portion 56 includes
The tip 51 is provided with a set screw 5C with the pressing surface 51A facing the upper frame 4 side. The tip 51 is disposed at a position where its pressing surface 51A comes into contact with the processing surface 31 of the horn part 3 by the rotation of the lower frame 5 toward the upper frame 4. It is formed so as to be substantially parallel to the processing surface 31 at the time of closest or contact with the surface 31.

FIG. 5 is a front view of the chip 51 (FIG. 5).
(A)), a left side view (FIG. 5B) and a plan view (FIG.
(C)). The chip 51 has a substantially rectangular parallelepiped overall shape, and the entire lower surface 51C in FIG. 5A is brought into contact with the upper frame 4 side facing surface (the upper surface in FIG. 1) of the chip holding member 56A. Screwed in state. Reference numeral 51D denotes a screw hole for this, and as shown in FIG. 5C, is provided substantially at the center of the upper frame 4 side facing surface of the entire chip 51. For this reason, the ultrasonic stapler 1 is held in a well-balanced and stable state with respect to the tip holding member 56A.
Even when the ultrasonic vibration is transmitted through the workpiece when using 0, the generation of the vibration sound due to the fluttering of the chip 51 is effectively prevented. Accordingly, ultrasonic vibration can be transmitted in a state where the contact state between the processing surface 31 and the workpiece is effectively maintained, and efficient ultrasonic welding can be performed.

On the upper surface of one end of the tip 51 (the tip 51 is mounted on the tip holding member 56A with the end facing the rotating end of the lower frame 5), the processed surface of the horn 3 is provided. The three protruding portions 51 in a state of protruding toward the
B is formed. Each of these convex portions 51B is shown in FIG.
5A is a rail shape along the longitudinal direction of the chip 51, and is arranged along the width direction of the chip 51 (perpendicular to the longitudinal direction). The upper end surface of each of the rail-shaped convex portions 51B has the above-described pressing surface 5B.
1A, and an inclined surface 51Ba is formed around the pressing surface 51A. That is, as shown in FIG. 5A, each of the convex portions 51B is formed in an equilateral trapezoidal shape with a cross section of the pressing surface 51A as an upper side.
Due to the inclined surface 51Ba, the workpiece and the chip 51 are easily separated from each other during the processing, and the workability is improved.

[0044] Note that the chip 51 is, similarly to the tip of the horn portion 3, a layer of hard alumite (e.g., Miyaki Group Ltd. trademark "Kashima Coat" used) is formed on the surface thereof. Therefore, the hardness of the pressing surface 51A, the corrosion resistance and the lubricity are improved.

FIG. 6 shows the upper cover 6 and the lower cover 7 when the ultrasonic stapler 10 is viewed from the right side in FIG.
FIG. 2 is a side view in which a portion near the connecting pin 11 is cut away. The code line C is not shown. As shown in the figure, the width of the upper frame 4 is set somewhat wider than that of the lower frame 5, and the side walls 4D and 4E of the upper frame 4 around the connecting pin 11 are connected to the side walls 5D of the lower frame 5. , 5E are connected to the lower frame 5.

The upper cover 6 and the lower cover 7 are also plastic molded products having a U-shaped cross section, and each of them is set wider than the upper frame 4. The upper cover 6 is screwed to the upper frame 4 so as to cover from above the upper frame 4, and the lower cover 7 is screwed to the lower frame 5 so as to cover from below the lower frame 5.

The connecting pin 11 is provided with engaging holes 4a, 5a formed in the side walls 4D, 4E of the upper frame 4 and the side walls 5D, 5E of the lower frame 5 overlapping each other.
(See FIG. 2), and its length is set equal to the width inside the lower cover 7. By setting to such a length, the side wall 7 of the lower cover 7
This has the effect of preventing deformation of D and 7E. That is, since the lower cover 7 is a plastic molded product as described above, if the height of each of the side walls 7D and 7E is equal to or more than a certain height, the tip of each of the side walls 7D and 7E is easily deformed inward after the formation. It has the property of. For this reason,
Due to such deformation, the side walls 7D and 7E of the lower cover 7 become
There was a possibility that the contact with the side walls 4D and 4E of the upper frame 4 would cause sliding and hinder the rotation of the lower frame 5 with respect to the upper frame 4, but by setting the connecting pin 11 to the above-described length, Side wall 7 of lower cover 7
D and 7E are supported from the inside to prevent deformation. Further, since the connecting pin 11 has such a length, the lower cover 7 is mounted on the lower frame 5 after connecting the frames 4 and 5, so that the connecting pin 11 is prevented from dropping in the insertion direction. It is supposed to be.

[0048] Further, the connecting pin 11 is the upper frame 4 and the lower frame 5 and is away from each other (working surface 31
And a pressing surface 51A (in a direction in which the torsion coil springs 12 are separated from each other). The torsion coil spring 12 extends both ends of a wire forming the coil spring, and both ends extending from the center axis direction of the coil spring form a V-shape. It comes into contact with the upper frame 4 and the lower frame 5 to urge the return force. The coupling pins 11 are inserted through the coil-shaped portions (coil spring portions) of the torsion coil springs 12 so that the torsion coil springs 12 are mounted on the frames 4 and 5.

[0049] Between the coiled portion and the connecting pin 11 of the torsion coil spring 12, the inner collar 13 is interposed. The inner diameter of the inner collar 13 is slightly smaller than the inner diameter of the coiled portion of the torsion coil spring 12, and the inner diameter is slightly larger than the outer diameter of the connecting pin 11.
This is a tubular member whose length is set to be slightly shorter than the width inside the lower frame 5. The inner collar 13 is inserted into the coiled portion of the torsion coil spring 12 in advance during the assembling process of the ultrasonic stapler 10, and both ends thereof are on both side walls 5 D, 5 E of the lower frame 5.
The connection pins 11 are mounted in such a state that the connection pins 11 are arranged corresponding to the respective engagement holes 5a, 5a for inserting the connection pins. By the inner collar 13, the torsion coil spring 12 can be held at a predetermined position in a stable state inside the lower frame 5, and productivity can be improved. At the same time, the inner collar 13 can prevent the wiring from being pinched by the torsion coil spring 12.

Here, in FIG. 6, a gap is shown between the inner collar 13 and both side walls 5D and 5E of the lower frame 5, but by setting the length to such a length that the gap does not occur, the torsion coil spring is formed. 12 can be held more effectively.

[0051] Also, reference numeral 5A of FIG. 6 and FIG. 1 is a rotation restricting projection, Reference numeral 4A is its receiving member.
That is, when the upper frame 4 and the lower frame 5 are opened at a certain angle or more, the rotation restricting projections 5A come into contact with the receiving member 4A to prevent further opening.
The rotation restricting projections 5A are appropriately set in advance with the restricting angles by the receiving member 4A and the torsion coil spring 12 described above, so that the working surface 31 and the pressing surface 51A are always kept at a constant distance from each other. Is possible,
The welding operation can be started immediately, and workability is improved.

Further , the upper cover 6 and the lower cover 7 will be described. First, as described above, the upper cover 6 is an exterior component having a U-shaped cross section and an opening at the lower side which covers the upper frame 4 so as to cover the upper frame 4 from above, and as shown in FIG. 4 is fixed. An enclosing space 6A is formed on the rotating end side (left side) of the upper cover 6 so as to enclose the ultrasonic vibrator 2 mounted on the upper frame 4, and the other end side (right side) has A cord bush 14 is provided for inserting and holding the above-described cord wire C inside.

FIG. 7A is a partial sectional view of the other end of the upper cover 6. FIG. 7B is a diagram of the other end of the upper cover 6 as viewed from the right side.
An inclined wall 6B is formed at the right end of the upper cover 6, and an inclined wall 6B is formed inside the upper cover 6.
A holding plate 6C is formed near B. The inclined wall 6B is provided with a semi-long hole-shaped notch 6D,
The cord bush 14 is mounted along the insertion direction U along the notch 6D.

The distance between the inclined wall 6B and the holding plate 6C becomes narrower toward the insertion direction U of the cord bush 14. Therefore, the inclined wall 6B and the holding plate 6
C are not parallel to each other, and are not parallel to the holding plate 6C.
B is inclined. The code 6E is the code bush 1.
4 is a notch for the passage of the code line C at the time of mounting, and the width thereof is set to be larger than the outer diameter of the code line C and smaller than the width of a vertical end surface 14A of the code bush 14 described later.

On the other hand, as shown in FIG. 8, the cord bush 14 is a tubular body made of an elastic material (rubber, synthetic resin, or the like) into which the code wire C is inserted. A vertical end face 14A perpendicular to the other end is formed on one end side (left end side). On the other end side (right end), the constriction 14 has a smaller outer diameter toward the end, and the outer diameter increases again at the end.
C is provided. For example, it is also possible to attach a band having a wall-hanging ring to the constriction 14C.

An inclined groove 14B is formed on the outer peripheral surface of the intermediate portion of the cord bush 14 along a surface inclined at a predetermined angle with respect to the vertical end surface 14A. ing. Here, the vertical end surface 14A
The angle formed between the inclined plate and the inclined surface along the inclined groove 14B is set to be equal to the angle formed between the holding plate 6C and the inclined wall 6B in the upper cover 6 described above. Also, the inclined groove 14
The groove width of B is set equal to the thickness of the wall surface of the inclined wall 6B.

As shown in FIG. 7C, the cord bush 14 is inserted in the insertion direction U by engaging the inclined groove 14B with the notch 6D of the upper cover 6. The inclined wall 6B of the upper cover 6 and the holding plate 6C are inclined with respect to each other so that the distance between them becomes smaller as it goes in the insertion direction . Therefore , as the cord bush 14 is inserted, the vertical end surface 14A comes into contact with the holding plate 6C, and the inner surface of the inclined groove 14B comes into contact with the inclined wall 6B. , code bushing 14 is held by those pressing force depending on the upper cover 6. Accordingly, when the cord bush 14 is attached to the upper cover 6, means such as a holding tool or a screw is not required, so that the number of parts can be reduced and productivity can be improved. The inclined wall 6B and the holding plate 6C
Is more desirably an angle that is slightly inclined than the state of being parallel to each other, more preferably 45 [°] or less, and more preferably 30 [°] or less.

The sectional shape of the cord bush 14 is not limited to a circle, but may be, for example, a polygon (square, hexagon, etc.). In this embodiment, the cord bush 14 is made of an elastic material. However, the cord bush 14 is made of a hard material, and the inclined wall surface 6B and the holding plate 6C of the upper cover 6 are made of an elastic material or a material having flexibility. May be formed.

Next, the lower cover 7 will be described.
As described above, the lower cover 7 is an exterior component having a U-shaped cross section and being open at the top, which covers the lower frame 5 so as to cover the lower frame 5 from below. As shown in FIG. Are connected to the connecting portion 55 of the lower frame 5 by screws via the protruding portions 7F and 7G provided on the lower frame 5.

On the other hand, near the turning end of the lower cover 7
An ultrasonic vibrating drive is provided on the surface facing the lower frame 5
Equipped with limit switch 52 as a movement switch
Have been.

[0061] Limit switches 52 this is arranged behind the chip 51 held by the receiving portion 56 of the lower frame 5 described above (opposite the surface facing the horn portion 3), the limit switch 52 The push button 52A protruding upward from the receiving portion 56 is pressed by the retreat of the receiving portion 56. The limit switch 52 is connected to the ultrasonic oscillator T via the lead wires L1 and L2, and closes the circuit when the push button 52A is pressed to drive the ultrasonic vibrator 2.

Next, the operation of the ultrasonic stapler 10 having the above configuration will be described.

The ultrasonic stapler 10 is connected to an ultrasonic oscillator T via a connector K of a code line C as shown in FIG. Then, as shown in FIG. 1, the workpiece W is placed between the processing surface 31 at the tip of the horn portion 3 and the pressing surface 51A of the chip 51, and the turning member 50 is pulled toward the turning member 40. The turning power is urged to the rotating member 50. At this time, since the pressing surface 51A of the tip 51 has not yet received the reaction force due to the contact from the processing surface 31 of the horn portion 3, the lower frame 5 and the lower cover 7 rotate simultaneously, and the tip of the receiving portion 56 The holding member 56A is supported by the leaf spring 56B and remains separated from the limit switch 52. Then, the workpiece W is sandwiched between the processing surface 31 and the pressing surface 51A, and the processing surface 31 and the workpiece W are effectively contacted.

In this state, when further turning power is urged to the rotating member 50, as shown in FIG.
Of the tip holding member 56A starts bending downward.
The back side contacts and presses the push button 52A of the limit switch 52. Therefore, the limit switch 52
Is closed, the voltage of the transmission frequency from the ultrasonic oscillator T is applied to the ultrasonic vibrator 2, and the ultrasonic vibrator 2 generates ultrasonic vibration. Then, the ultrasonic vibration is amplified in the horn section 3 and transmitted in the direction of the central axis of the horn section 3 to vibrate the processing surface 31 in the vertical direction. As a result, melting occurs in the workpiece, and the work surface 3
Welding is performed by pressure contact between the pressure member 1 and the pressing surface 51A. After the welding is completed, the biasing force of the rotating power to the rotating member 50 is loosened, and the chip is held by the returning force of the leaf spring 56B.
The member 56A is separated from the limit switch 52, and the driving of the ultrasonic vibrator 2 is promptly stopped.

In this embodiment, the processing surface 31 of the horn 3
Is formed so as to be perpendicular to the vibration direction of the ultrasonic vibration transmitted through the horn portion 3, so that the entire processing surface 31 transmits ultrasonic vibration to the workpiece by repeating continuous pressing. As a result, compared with the conventional case where the workpiece is melted by sliding, the ultrasonic vibration is efficiently transmitted to the workpiece, and the melting can be quickly and effectively performed. I have.

As a result, it is possible to use a small ultrasonic transducer having a small output, and it is not necessary to provide a means for increasing the pressing force of the pressing surface, and the ultrasonic stapler 10 can be reduced in size. It has become possible.

Further, the ultrasonic stapler 10 is provided with a tip holder.
The holding member 56A is supported by a leaf spring 56B, and
Power (to the extent that it can resist the elastic force of the leaf spring 56B)
The tip holding member 56A is capable of retreating freely.
Since the limit switch 52 is installed behind the
After the workpiece W has sufficiently contacted the processing surface 31, the ultrasonic vibration
Is transmitted.

[0068] For this reason, as compared with the case where the processing surface 31 has started the ultrasonic vibrations before contacting the workpiece, to transmit effectively ultrasonic vibration only in the contact area of the processing surface 31 In addition to this, there is no possibility that the workpiece W is unnecessarily damaged, and the welded surface can be smoothly finished without being disturbed.

Further, since the limit switch 52 is closed in accordance with the rotation of the rotating member 50, an independent operation for closing the limit switch 52 is not required in addition to the rotation operation, and the limit switch 52 is closed at the position where the switch is provided. Accordingly, there is no restriction on how to hold the ultrasonic stapler 10, so that the operability of the ultrasonic stapler 10 can be improved.

Further , since the leaf spring 56B is used to hold the chip holding member 56A, the leaf spring 56B is replaced with a spring having a different spring constant, thereby setting the rotational power for closing the limit switch 52. Can be easily changed. Therefore, it is also possible to provide a user of the ultrasonic stapler 10 with an ultrasonic stapler according to the grip strength.

In this embodiment, the receiving portion 56 and the limit switch 52 are provided on the lower frame 5 side.
The structure provided in the upper frame 4 may be sufficient. In such a case, the upper frame 4 is divided into a holding portion of the ultrasonic vibrator 2 and the horn portion 3 and a connecting portion of the lower frame 5, these are connected by a leaf spring, and an upper cover 6 is provided on the connecting portion side. Then, a limit switch is provided in a gap generated between the holding portion and the upper cover 6.

In this embodiment, the tip holding member 56
Although A is supported by a leaf spring, it is not particularly limited to this. For example, as shown in FIG.
The rid, between the chip holding member 56A and the lower cover 7, arranged elastic members 56C, 56C, such as a coil spring which gives a return force in a direction away the chip holding member 56A from the lower cover 7, lower cover The limit switch 52 may be provided at a position behind (below) the chip holding member 56A. This configuration also functions almost in the same manner as in the above embodiment.

[0073]

Since the present invention is constructed and functions as described above, according to this, it is possible to retreat freely near the turning end of one of the turning members by applying a constant turning force. Since the receiving part is provided and a switch for driving the ultrasonic vibrator is provided behind the receiving part, the ultrasonic vibrator starts driving after the processing surface and the pressurized surface sandwich the workpiece, and the workpiece is processed. After sufficient contact, ultrasonic vibrations are transmitted. For this reason, compared with the case where the ultrasonic vibration is started before the processing surface comes into contact with the workpiece, it is possible to effectively transmit the ultrasonic vibration only within the contact area of the processing surface. In addition, there is no possibility that the workpiece is unnecessarily damaged, and the welding surface can be smoothly finished without being disturbed.

[0074] Also, for closing the switch in accordance with rotation of the rotating member, along with other operations independently is closed the switch of the turn operation is not necessary, ultrasonic stapler in accordance with the position provided with the switch Since there is no restriction on how to grip, the operability of the ultrasonic stapler can be improved.

As a result, according to the present invention, it is possible to provide an excellent ultrasonic stapler which has not been achieved conventionally.

[Brief description of the drawings]

FIG. 1 is a sectional view of an ultrasonic stapler according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a part of the ultrasonic stapler disclosed in FIG.

FIG. 3 is a perspective view showing a state where the ultrasonic stapler and the ultrasonic oscillator disclosed in FIG . 1 are connected.

[4] an explanatory view showing the relationship between the dimensions of the fixing bracket and the electrode plate disclosed in FIG. 1, FIG. 4 (A) shows a plan view of the fixing bracket, FIG. 4 (B) of the electrode plate FIG .

5 shows the chip disclosed in FIG . 1 , wherein FIG. 5 (A) is a front view, FIG. 5 (B) is a left side view, and FIG. 5 (C) is a plan view.

FIG. 6 is a cross-sectional view of the ultrasonic stapler disclosed in FIG . 1 in the vicinity of the connection pin and in a direction along the connection pin.

[7] A portion of the upper cover shown to view the ultrasonic stapler pivot point near disclosed in FIG. 1, FIG. 7
7A is a partial cross-sectional view, and FIG. 7B is a view in FIG.
FIG. 7C is a right side view, and is an explanatory view showing a case where a cord bush is mounted.

8 shows the cord bush disclosed in FIG . 1 and FIG.
8A is a front view, and FIG. 8B is a plan view.

FIG. 9 is an operation explanatory view of the ultrasonic stapler disclosed in FIG. 1;

FIG. 10 is a partially enlarged explanatory view showing another example of the receiving portion of the ultrasonic stapler disclosed in FIG.

FIG. 11 is a partially cutaway front view showing a conventional example.

FIG. 12 is a cross-sectional view showing the structure of the switch of the conventional example.

[Explanation of symbols]

2 Ultrasonic Vibrator 3 Horn 31 Working Surface 40 One Rotating Member 50 The Other Rotating Member 51A Pressing Surface 52 Limit Switch (Switch for Ultrasonic Vibrator Driving) 56 Receiver 56A Chip Holding Member 56B Leaf Spring 10 , 10P ultrasonic stapler

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B29C 63/00-65/82 B23K 20/00-20/26

Claims (2)

(57) [Claims] 1. One and the other two rotating members opposing each other and rotatably connected at one end of each other, an ultrasonic vibrator for generating ultrasonic vibration, and amplifying the ultrasonic vibration. And a horn having a machined surface at the tip thereof, and the ultrasonic vibrator and the horn are integrally provided at a rotating end of the one rotating member, and the other rotating member is provided. is Oite ultrasonic stapler comprising comprises a chip having the processing surface abutting pressure surface by the rotation of the rotating member in the rotation end, the other rotating member, the rotating end In the vicinity of the portion, while having a receiving portion equipped so as to be retractable by the biasing of a predetermined rotational power in the direction in which the processing surface and the pressurizing surface are in contact with each other, the receiving portion is equipped with the chip, Behind this receiving part, before closing by closing the receiving part An ultrasonic stapler comprising a switch for driving the ultrasonic vibrator. 2. The receiving part includes a chip holding member that holds the chip at one end, and a tip holding member that holds the other end of the chip holding member and the other end of which is connected to the connecting part of the other rotating member. 2. The ultrasonic stapler according to claim 1, wherein the ultrasonic stapler comprises a supported leaf spring.