JP2009090364A - Ultrasonic sealing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultrasonic sealing device in which, when a tip of an anvil arranged in confrontation with an ultrasonic horn is damaged or worn, the relevant portion of the tip can be easily replaced, and the replacement work can be easily performed, so that workability can be improved and, accordingly, productivity can be raised, in spite of its simple and low-cost structure. <P>SOLUTION: A tip 7X of an anvil 7 is constructed so as to be easily detachable from the main body part of the anvil 7; for instance, the tip 7X is combined and fixed to a housing part 7B located at the front edge of the anvil 7 with a bolt 7C and the like. The anvil 7 is so constructed as to be capable of approaching and moving away (advancing and retreating) with respect to an ultrasonic horn 4 by fitting tightly a fitting pin 8I protruded at the underside of a rotational, approaching and moving away factor 8H into an oval shaped fitting hole 7E prepared in the anvil 7 and by rotating the rotational approaching and moving away factor 8H, that a front edge of the tip 7X can be replaced by simple work, in a short period of time and without incurring damage and the like on the side of the ultrasonic horn 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an ultrasonic sealing device that irradiates ultrasonic waves onto a sheet (packaging material) in a stacked state, generates heat, and seals it by heat welding.

  As this type of ultrasonic sealing device, for example, the one described in Patent Document 1 has been proposed by the applicant of the present application.

  As shown in FIG. 7, the ultrasonic sealing device described in Patent Document 1 is provided with an ultrasonic horn 4 connected to an ultrasonic oscillator 3 and an ultrasonic wave disposed so as to face the ultrasonic horn 4. A superposed sheet (packaging film) FX is disposed between the cradle (anvil) 7 and the ultrasonic oscillator 3 and the ultrasonic wave are irradiated with ultrasonic waves from the ultrasonic oscillator 3 in this state. The horn 4 and the cradle 7 are moved integrally (vertically moved) in the vertical direction (the width direction (lateral direction) of the sheet FX) in FIG. 7 so as to weld the sheet FX to form a seal line. Is configured to do.

And in the ultrasonic sealing apparatus of patent document 1, the shape of the front-end | tip part 7X of the receiving stand 7 which opposes the ultrasonic horn 4 is devised, and as shown to (a) of FIG. In addition to being formed in an arc shape, the tip 7X is tapered as shown in FIG. 8B, so that when the sheet is moved laterally, the cradle catches on the front edge of the sheet and damages the sheet. Even when the fear is avoided or the tip is worn or damaged, the tip is reworked against the disc-shaped cradle (anvil) as described in Patent Document 2. Is extremely easy and inexpensive.
JP 2002-45779 A Japanese Patent Publication No.62-33065

  However, user requirements and usage modes of the ultrasonic sealing device are diversified, and it is necessary to develop various types of ultrasonic sealing devices in order to meet such diversification.

  For example, the cradle 7 described in Patent Document 1 can be easily reworked when its tip is damaged or worn. For rework, the entire cradle 7 can be removed from the main body of the apparatus. Since it must be removed, there is a demand to improve workability in order to complicate the work when there is no work space.

  Furthermore, in the case of the cradle 7 described in Patent Document 1, if damage or wear occurs to such an extent that recovery cannot be achieved by reworking, it is necessary to replace the cradle 7 as a whole, which increases costs. Therefore, there is a demand for cost reduction.

  The present invention has been made in view of such circumstances, and is simply applicable when the tip of the cradle disposed opposite to the ultrasonic horn is damaged or worn while being simple and inexpensive. It is an object of the present invention to provide an ultrasonic sealing device that can replace parts and can easily perform replacement work and the like, thereby improving workability and extending productivity.

Therefore, the ultrasonic sealing device according to the present invention is
An ultrasonic horn connected to an ultrasonic oscillator;
A receiving portion disposed to face the tip of the ultrasonic horn;
With
An ultrasonic sealing device that forms a seal by relatively moving the ultrasonic horn and the receiving portion, and a sheet that is a target of seal formation,
The front end portion of the receiving portion has a substantially fan shape and is detachable from the receiving portion main body.

  Further, the present invention moves the ultrasonic horn or at least one of the receiving portion using an eccentric mechanism that converts the rotation into linear movement using the eccentricity, and moves the tip of the ultrasonic horn and the receiving portion. The tip can be configured so as to be able to contact and separate.

  According to the present invention, although the configuration is simple and inexpensive, the corresponding portion can be easily replaced when the tip of the cradle disposed facing the ultrasonic horn is damaged or worn. In addition, it is possible to provide an ultrasonic sealing device that can easily perform replacement work and the like, improve workability, and improve productivity.

  Hereinafter, an embodiment of an ultrasonic sealing device according to the present invention will be described with reference to the accompanying drawings. The present invention is not limited to the embodiments described below.

  In the ultrasonic sealing device according to the present embodiment, as shown in FIG. 1, guide rails 1A and 1B are attached to the frame base 1 substantially in parallel. Sliders 2A and 2B that slide along the guide rails 1A and 1B are slidably disposed on the guide rails 1A and 1B. An ultrasonic oscillator 3 that is reciprocated in the width direction (lateral direction) of the sheet FX is attached.

  An ultrasonic horn 4 for receiving and amplifying and conducting ultrasonic waves is attached to the tip side of the ultrasonic oscillator 3. The tip of the ultrasonic horn 4 passes through the slide hole 5A of the clamp plate 5 and faces a double-layered sheet (packaging material) FX clamped between the clamp plate 5 and the clamp substrate 6. It is arranged to be able to.

  A cradle 7 is disposed at a position facing the tip of the ultrasonic horn 4, and the tip 7 </ b> X faces the tip of the ultrasonic horn 4. Further, the cradle 7 is moved through the support 10 (see FIG. 2) so that it moves in synchronization with the movement of the ultrasonic horn 4 and the ultrasonic oscillator 3 in the vertical direction in FIG. The horn 4 and the ultrasonic oscillator 3 are attached substantially integrally.

  As shown in FIG. 2, the distal end portion 7 </ b> X of the cradle 7 passes through the slide hole 6 </ b> A opened in the clamp substrate 6 and passes through the slide hole 5 </ b> A opened in the clamp plate 5. The front end of the horn 4 faces with a predetermined gap, and the sheet FX is sandwiched between the predetermined gaps.

In this configuration, the two-layered sheet FX clamped between the clamp plate 5 and the clamp substrate 6 is sandwiched between the tip of the ultrasonic horn 4 and the tip of the tip portion 7X of the cradle 7, while The ultrasonic horn 4 and the pedestal 7 are moved in the vertical direction 2 (up and down direction in FIG. 1), and an adhesive line is formed on the sheet FX by the ultrasonic wave to be sealed.
In FIG. 1, reference numeral 6 </ b> Z is a reinforcing plate for the clamp substrate 6 having the slide holes 6 </ b> B.

  Here, as shown in FIG. 3, the tip portion 7X of the cradle 7 according to the present embodiment can be easily replaced with a damaged or worn portion when it is damaged or worn. It is easily removable (detachable) from the main body portion of the cradle 7. For example, the detachable tip portion 7X is fastened and fixed to a positioning housing portion 7B that is formed at the tip of the cradle 7 in a shape corresponding to a part of the tip portion 7X and that is housed while positioning using bolts 7C or the like. Can.

  As shown in FIGS. 3 and 4, the distal end portion 7 </ b> X has a fan shape, and the distal end side (outer peripheral side) is thin so that a good bond line can be formed when sealing with ultrasonic waves. Is formed. In addition, although not limited to a fan shape, when using a fan shape, for example, after manufacturing a disk-shaped member by a relatively low cost cutting process, for example, four (2 3 or 5 or more), the tip portion 7X can be obtained, which is advantageous in that it can contribute to cost reduction.

Further, if the tip portion 7X is fan-shaped, the tip portion 7X of the cradle 7 is caught on the front edge of the sheet FX when the ultrasonic horn 4 and the cradle 7 are moved laterally, and the sheet FX is damaged. Such fears can be avoided.
Note that the cradle 7 is fixed to the support base 10 via the fixing base 8 as shown in FIGS.

  As shown in FIGS. 5B and 5D, the cradle 7 has a circular outer periphery, and the circular outer periphery is as shown in FIG. The receiving hole 8A opened in the fixed base 8 is inserted. In addition, a bearing, a bush, etc. can be arrange | positioned in 8 A of accommodation holes, in order to make the movement of the receiving stand 7 smooth.

  Further, as shown in FIG. 5D, the region 7A of the circular outer peripheral portion of the cradle 7 has, for example, an outer peripheral shape having two sides that are cut off and intersect at approximately 90 degrees. Is formed. Then, when the region 7A of the cradle 7 is inserted into the anti-rotation member 9 (see FIG. 3 and the like) having an opening corresponding to the shape, the cradle 7 is shown in FIG. The rotation is restricted in the planes b) and (d).

  Further, as shown in FIG. 3, an opening 7D is provided on the rear end side of the cradle 7, and an elastic element 8B such as a coil spring is disposed in the opening 7D. The elastic element 8B is attached with a rod-shaped adjusting member 8C whose outer periphery is threaded through a nut 8D or the like. The elastic element 8B causes the cradle 7 to move to the tip side (the ultrasonic horn 4 side). It will be elastically biased. Thereby, the receiving base 7 is positioned with respect to the fixed base 8 by pressing an engaging hole 7E described later against an engaging pin 8I described later. The adjustment member 8C is fastened and fixed to a support plate 8E attached to the rear end of the cradle 7 via a fixing nut 8F or the like.

  Here, an oval engagement hole 7E that is long in the minor axis direction of the cradle 7 is provided in the upper portion of the cradle 7, and the engagement hole 7E is shown in FIG. As described above, the engaging pin 8I that protrudes below the rotating contact / separation element 8H that is screwed into the screw hole 8G provided in the fixed base 8 is engaged. As shown in FIG. 6, the engagement pin 8I is disposed with a predetermined offset with respect to the central axis of the rotation contact / separation element 8H and the screw hole 8G (ie, the rotation center of the rotation contact / separation element 8H). Has been.

In this configuration, since the cradle 7 (and hence the engagement hole 7E) is pressed and biased toward the distal end by the elastic force of the elastic element 8B, the engagement is engaged with the engagement hole 7E and offset. The pin 8I is moved in the direction of the distal end of the cradle 7. Accordingly, the rotation contact / separation element 8H is rotated counterclockwise in FIGS. 3A and 6B, and the rotation contact / separation element 8H is It stops at a position where it cannot rotate further counterclockwise.
As a result, the position of the cradle 7 is restricted to a position where it cannot approach the ultrasonic horn 4 any more. In such a state, a gap adjustment mechanism (not shown) adjusts the gap between the distal end of the distal end portion 7X and the distal end of the ultrasonic horn 4 facing this to be desired.

  On the other hand, for example, when the tip 7X of the cradle 7 is damaged, worn, or the like and needs to be replaced, the rotary contact / separation element 8H is connected to the timepiece in FIGS. 3A and 6B. Rotate in the direction. As a result, the engagement pin 8I is moved in the rear end direction of the cradle 7 and the engagement hole 7E engaged therewith is pushed to move the cradle 7 in the rear end direction. The ultrasonic horn 4 is separated (retracted) from the tip of the ultrasonic horn 4 by a predetermined amount.

  Therefore, while the seal forming process using ultrasonic waves can be performed as in the conventional case, when the tip portion 7X is exchanged, the tip of the tip portion 7X can be easily connected to the tip portion 7X by simply rotating the rotary contact / separation element 8H. Since the tip of the sonic horn 4 can be separated from the tip of the horn 4 by a predetermined distance, for example, the tip of the tip portion 7X comes into contact with the tip of the ultrasonic horn 4 during replacement work (detachment work) and is relatively expensive. The fear of damaging the ultrasonic horn 4 can be avoided, and the workability can be effectively improved.

  In this case, the rotation detachment element 8H, the engagement pin 8I, the engagement hole 7E, and the like are included, and the rotation is converted into a linear movement by using an eccentricity (offset), so that the ultrasonic horn 4 or the reception is received. A mechanism for moving at least one of the bases 7 and contacting / separating them corresponds to an example of an eccentric mechanism according to the present invention.

  Thus, in the present embodiment, the engagement pin 8I that protrudes below the rotation contact / separation element 8H and is offset from the rotation center of the rotation contact / separation element 8H, and the length provided on the cradle 7 are provided. By engaging the circular engagement hole 7E and rotating the rotary contact / separation element 8H, the cradle 7 is configured to be able to contact and separate (advance and retreat) with respect to the ultrasonic horn 4; Therefore, the replacement work (detachment work) can be performed in a short time and without damaging the ultrasonic horn 4 side, for example, and the workability can be effectively improved.

  As described above, according to the present embodiment, when the distal end portion 7X of the cradle 7 disposed to face the ultrasonic horn 4 is damaged or worn with a simple and inexpensive configuration. The tip portion 7X can be easily replaced, and replacement work can be easily performed. Therefore, according to the present embodiment, the workability can be improved, and the stop time can be shortened, so that the productivity can be improved.

  In addition, the ultrasonic sealing apparatus according to the present embodiment can be applied to an automatic packaging machine that performs vertical sealing or horizontal sealing on a packaging film and packages the contents, for example, packaging contents such as tea or green tea. The present invention can be applied to a pyramid pack packaging machine that wraps in a pyramid shape using a film.

  The embodiment described above is merely an example for explaining the present invention, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view partially including a cross section illustrating an example of an overall configuration of an ultrasonic seal mechanism according to an embodiment of the present invention. It is a side view including a cross section in part showing an example of the entire configuration of the ultrasonic sealing device according to the embodiment. (A) is a front view of an assembly diagram showing a configuration example in which the cradle according to the embodiment is incorporated in the fixed base, and (b) is a configuration example in which the cradle according to the embodiment is incorporated in the fixed base. FIG. (A) is a front view which shows the structural example of the front-end | tip part of the cradle which concerns on embodiment same as the above, (b) is a X arrow directional view of (a). (A) is a front view which shows the structural example of the cradle which concerns on embodiment same as the above, (b) is a B arrow directional view of (a), (c) includes the partial cross section of (a). It is a side view, (d) is AA sectional drawing of (c). (A) is a figure which shows the structural example of the rotation contact / separation element which concerns on embodiment same as the above, (b) is a side view of (a). It is a side view including a cross section in part showing an example of the overall configuration of a conventional ultrasonic seal mechanism. (A) is a front view which shows the structural example of the conventional cradle, (b) is a side view of (a).

Explanation of symbols

3 Ultrasonic Oscillator 4 Ultrasonic Horn 7 Receiving Base 7X Tip 7E Engaging Hole 8 Fixing Base 8H Rotating Contact / Separation Element 8I Engaging Pin FX Sheet (Packaging Material)

Claims (2)

An ultrasonic horn connected to an ultrasonic oscillator;
A receiving portion disposed to face the tip of the ultrasonic horn;
With
An ultrasonic sealing device that forms a seal by relatively moving the ultrasonic horn and the receiving portion, and a sheet that is a target of seal formation,
An ultrasonic seal device characterized in that a tip portion of the receiving portion has a substantially fan shape and is detachable from the receiving portion main body.   Using at least one of the ultrasonic horn and the receiving portion is moved by using an eccentric mechanism that converts the rotation into linear movement using eccentricity, and the tip of the ultrasonic horn and the tip of the receiving portion are contacted and separated. The ultrasonic sealing apparatus according to claim 1, wherein the ultrasonic sealing apparatus is configured to be possible.