JP2834404B2 - Mouth attachment device for tubular film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for attaching a mouthpiece to a tubular film.

[0002]

2. Description of the Related Art As a flexible resin bag for containing a liquid or powder, a mouthpiece made of a soft or hard resin material is attached to the mouth of the bag. As described in JP-A-63-193813, etc., a tubular film is cut to a predetermined length, and at the same time, the cut portion is welded to form a bag bottom, and at the same time, the tubular film is moved toward the mouth side. It is manufactured by inserting a mouthpiece and fixing it around by welding or heat welding using electromagnetic waves or ultrasonic waves.

[0003] By the way, initially, the cylindrical film has a strip shape (sheet shape) in which the mouth is flattened and both ends are creased along the longitudinal direction. Therefore, it is necessary to open the mouth before inserting the mouthpiece into the mouth of the tubular film. Therefore, in the technique described in the above publication, a method is employed in which both outer surfaces near the mouth of the tubular film are sucked by suction cups, and the suction cups on both sides are separated from each other.

[0004]

When watertightness or the like is required between the fixing of the tubular film and the mouthpiece, the positioning and mounting posture of these two members must be made with high precision. Therefore, it is necessary to fix the cylindrical film to the mouthpiece as close to the opening edge as possible. In this case, at the stage of inserting the mouthpiece into the mouth of the tubular film, the suction cup for opening the mouth must adsorb a portion away from the mouth to the bag bottom side so as not to hinder the fixing work. I had to.

[0005] However, the tubular film is initially kept flat and strongly maintained because the inside is evacuated, moisture or oil remains, or molding habits remain. The opening may be difficult. Therefore, there is a problem that the opening of the opening of the tubular film becomes uncertain even if the parts separated from the opening are sucked and separated from each other as described above. As a result, frequent maintenance is required, and work must be interrupted, resulting in a decrease in work efficiency.

Conventionally, there is a two-stage configuration in which a work station for opening the mouth of a tubular film and inserting a tool and a work station for fixing the tubular film to the tool are separated. In this case, the above problem could be avoided. However, in this case, it goes without saying that the apparatus is inevitably enlarged and complicated, and the positioning accuracy of the tool is deteriorated. Becomes more and more complicated).

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and can easily and reliably attach a mouthpiece to a tubular film without increasing the size and complexity of the apparatus. It is an object of the present invention to provide a device for attaching a mouthpiece to a tubular film which can achieve high efficiency.

[0008]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, the device for attaching a mouthpiece for a tubular film according to the present invention includes a set portion for holding the tubular film, and a pair of suction devices capable of sucking both outer surfaces near the mouth of the tubular film held by the set portion. When,
Opening operation means for enabling these adsorbers to be separated from each other and close to each other; mouthpiece supply means for inserting a fastening portion of the mouthpiece into the mouth of the cylindrical film held by the set portion; and fastening of the mouthpiece A fixing device comprising a pair of combinations of abutment surfaces corresponding to the periphery of the margin, and fixing operation means for enabling these fixing devices to approach and separate from each other; The positions in contact with the film are both as close as possible to the opening edge of the mouth, and the fixing operation means enables the two fixing devices to approach each other only when the opening operation means separates the two adsorbers from each other. It is characterized by having

The opening operation means and the fixing operation means are connected by an interlocking mechanism so that the two adsorbers come close to each other in a manner similar to that of the two adsorbers moving away from or retreating from the set portion. It is possible.

[0010]

The opening of the cylindrical film can be reliably performed because the opening operation is performed by adsorbing as close to the opening edge as possible to the mouth of the cylindrical film. When the tubular film and the mouthpiece are fixed, the suction that previously held the mouth open is released, and the opening edge is left in the fixing margin of the mouthpiece, that is, the tubular film is fixed. There should be nothing around the mouth (no adsorber, etc.).

In this way, the fixing device is brought into contact with the opening as close as possible to the opening to fix the opening to the mouthpiece. When the adsorber moves away from the suction position with respect to the cylindrical film or retreats, an interlocking mechanism that makes the fixing device close to the cylindrical film by interlocking with these movements is adopted. Can be performed with high efficiency.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a mouthpiece mounting device 1 according to the present invention.
, An adsorber 3 provided at an upper portion and a lower portion of the set portion 2 facing each other, and an opening operation means 4 provided to cause the upper and lower adsorbers 3 to perform a predetermined operation. A fixing device 5 is provided in front of the adsorber 3 (to the left in FIG. 1), and is also provided at the upper part and the lower part of the set part 2 so as to face each other. And a tool supply means 7 provided in front of the setting section 2.

Reference numeral 10 denotes an upper frame, and 11 denotes a lower frame. A pair of parallel horizontal members 12 are connected by a front plate 14 and a rear plate 15 via a horizontal joint plate 13.
It is configured in a frame shape. The opening operation means 4 includes upper and lower components corresponding to the upper and lower adsorbers 3, respectively, and these components are separately provided in an upper frame 10 and a lower frame 11, respectively. However, since these two components have substantially the same configuration except that the vertical direction is reversed, a description will be given below mainly of the upper component. The same applies to the fixing operation means 6.

FIGS. 6A and 6B show an example of the bag 17 manufactured in the present invention.
Reference numeral 8 denotes a mouthpiece. The mouthpiece 18 has a straight cylindrical shape including a fixing margin 18a as shown in FIG. 6 (a), or is fixed as shown in FIG. 6 (b). There is a case in which a bag opening frame 19 is provided in the substitute portion 18a. The opening operation means 4 has a front and rear plate 14,
A movable base plate 23 provided via an upright base plate 22 provided between the movable base 15 and an inclined advance / retreat tool 25 provided on the movable base 23 via a bracket 24 so that the output end side is directed obliquely downward; A joint member 26 provided at the output end of the inclined advance / retreat tool 25, and a lifting / lowering tool 27 provided such that the output end side of the joint member 26 is directed downward.
And an adsorption base member 2 provided at an output end of the lifting / lowering device 27.
8 and a plurality (three in the illustrated example) of the adsorbers 3 provided downward with respect to the adsorption base member 28.

A fluid pressure cylinder, an electric driving device, or the like is used for the tilting / retracting tool 25 and the lifting / lowering tool 27. The adsorber 3 is connected to a vacuum device (not shown). When the inclination advance / retreat tool 25 advances the joint member 26 downward, and the elevating tool 27 lowers the suction base member 28 (FIG. 4).
(See (a))), each adsorber 3 comes into contact with or approaches the upper surface as close to the opening edge as possible with respect to the mouth of the cylindrical film W held on the set portion 2. I have.

The fixing operation means 6 includes a lifting / lowering device 30 provided so that an output end of the upper frame 10 faces directly below the front plate 14, and a connecting frame 3 provided at the output end of the lifting / lowering device 30.
1 and the fixing device 5 provided above. The fixing device 5 is formed by a pair of upper and lower parts, for example, as shown in FIG.
Has a contact surface 5a (in the illustrated example, concavely curved) corresponding to the periphery of the fixing margin 18a of the mouthpiece 18 shown in FIG. The contact surface 5a has a structure capable of performing welding or heat welding using electromagnetic waves or ultrasonic waves.

The opening operation means 4 and the fixing operation means 6
Are linked to each other by a link mechanism 35. This interlocking mechanism 35 is provided with a pair of upper and lower horizontal guide bars 37 with respect to the upright base plate 22 provided on the upper frame 10, and the movable base plate 23 of the opening operation means 4 is moved along these horizontal guide bars 37. It is held so that it can move back and forth. The upright base plate 22 is provided with an L-shaped lever 40 swingable about a pivot 38, and the downward end of the L-shaped lever 40 is connected to the movable base plate 23 by a link 41. Further, the upward end of the L-shaped lever 40 and the fixing operation means 6
Is connected to the connection frame 31 by a link 42.

For this reason, the fixing operation means 6 (elevator 30)
When the user intends to lower the fixing portion 5, the connecting frame 31
The L-shaped lever 40 swings via the link 42 and pushes the link 41 backward (to the right in FIG. 1). Accordingly, the movable base plate 23 of the opening operation means 4 also retreats, whereby the adsorber 3 and the like retreat backward from around the mouth of the tubular film W.

As described above, the opening operation means 4 and the fixing operation means 6 are configured to be paired up and down, including the interlocking mechanism 35, respectively.
The respective operating conditions of the lower component are synchronized with each other (operate upside down at the same timing). The mouthpiece supply means 7 has a mouthpiece holding portion 45 capable of holding the mouthpiece 18 by, for example, a chucking mechanism (not shown). The mouthpiece holding portion 45 is provided with respect to the mouth portion of the tubular film W held by the set portion 2.
The fore-and-aft movement is only possible so that the fixing allowance 18a of the held tool 18 can be inserted. Reference numeral 46 denotes a back and forth movement table, and 47 denotes a rail for guiding the back and forth movement.

Next, a method of attaching a mouthpiece according to the present invention will be described based on the operating conditions of the above-described mouthpiece attachment apparatus 1. The state shown in FIG. 1 is a setting state, in which the setting portion 2 holds the tubular film W with the mouth thereof facing forward (to the left in FIG. 1). The mouthpiece 18 is held by the part 45 with the fixing margin 18a facing rearward (to the right in FIG. 1).

When the completion of setting is detected by a sensor (not shown) or an operation start switch (not shown) is operated, first, as shown in FIG.
, The tilting and retreating tool 25 operates to move the suction device 3 upward and downward with respect to the mouth of the tubular film W. Next, the lifting / lowering tool 27 is operated to bring the adsorber 3 into contact with or close to the upper and lower surfaces of the opening of the tubular film W near the opening edge as much as possible.

After the suction device 3 starts suctioning by a vacuum device (not shown), the lifting / lowering device 27 performs a return operation to move the suction devices 3 in directions away from each other. Therefore, FIG.
As shown in (b), the cylindrical film W is in an open state. Next, the front-rear movement table 46 of the tool supply means 7 moves rearward (to the right in FIG. 1), and only the fixing margin 18a of the tool 18 is inserted into the mouth of the tubular film W.

In this state, the suction action of the adsorber 3 is released to release the mouth of the tubular film W (it is certain that the instantaneous backflow of air causes a vacuum break). Is placed in a state where it can be deposited in the fixing allowance 18a of the mouthpiece 18. Then, the tilt advance / retreat tool 25 performs a return operation.
Next, the elevating and lowering tool 30 of the fixing operation means 6 operates to press the fixing device 5 around the fixing margin 18a of the mouthpiece 18 from both outer sides of the tubular film W as shown in FIG. Then, fixing is performed by the fixing device 5. At this time, since the adsorber 3 and the like are retracted rearward by the interlocking mechanism 35, the adsorber 3 and the fixing device 5 do not interfere with each other.

Thereafter, the lifting / lowering tool 30 and the mouthpiece supply means 7
1 performs a return operation, and one cycle ends. By the way, in the present invention, the material of the tubular film W and the mouthpiece 18 is not limited at all, as long as it can be fixed to each other by welding by electromagnetic waves or ultrasonic waves, heat welding, or the like. For example, as the tubular film W, a simple substance or a composite of PVC, PA, PP, PE, or the like,
These can be laminated together. Further, as a technique for forming a cylindrical shape, a method obtained by an inflation molding method, a seal molding method, or the like can be used.

The shape of the mouthpiece 18 is as described above (FIG. 6).
In addition to these, there are various types, and accordingly, the number, arrangement, or shape of the adsorbers 3 (for example, a block having a plurality of suction holes is used, or small suction cups are arranged as a plurality of aggregates). Etc.) as appropriate, or the fixing device 5
The shape (flat shape, semi-elliptical shape, semi-circular shape, polygonal shape, etc.) and the number (such as a division method) of the contact surface 5a can be changed as appropriate.

The interlocking mechanism 35 includes the L-shaped lever 40 described above.
The structure is not limited to a link structure in which the traction members 55 are formed of a belt, a rope, a chain, or the like, as shown in FIGS. 7 and 8, for example. You can also. That is, the interlocking mechanism 35 includes the front plate 14 of the upper frame 10 and the movable base plate 23 of the opening operation means 4 (the upright base plate 22 in the same manner as described above).
(Which is held movably back and forth via a guide rail 37 provided at the front end) by a spring 56 in a tensioned state. A notch 57 is formed on the rear plate 15 of the upper frame 10 so as to open frontward and rearward and upward, and a hook-shaped extension 22a is provided on the upright base plate 22 so as to extend rearward of the notch 57. Then, the first pulley 58 is provided on the upright base plate 22 at the rear side of the cutout portion 57, the second pulley 59 is provided above the first pulley 58, and the third pulley 60 is provided at a position in front of the first pulley 58 and above the fixing device 5. Are rotatably provided. Then, the towing member 55 is stretched over the first to third pulleys 58 to 60, and both ends thereof are respectively connected to the moving base plate 23 of the opening operation means 4 and the connection frame 31 of the fixing operation means 6. To do.

In the interlocking mechanism 35 having such a configuration, when the fixing operation means 6 (elevator 30) lowers the fixing part 5, the moving base of the opening operation means 4 via the connecting frame 31 and the towing member 55. The plate 23 is pulled rearward, whereby the adsorber 3 and the like retreat backward from around the mouth of the tubular film W. When the fixing portion 5 is raised, the movable base plate 23 is moved forward and returned by the restoring force of the spring 56.

Needless to say, this interlocking mechanism 35
Are also provided as a pair with respect to the lower frame 11 so as to operate in synchronization with the above. As the interlocking mechanism 35, in addition to the two examples described above, a gear mechanism, a cam mechanism, a combination mechanism of a rack and a pinion, or the like may be used alone or in combination. Note that the opening operation means 4 and the fixing operation means 6 may be linked with each other by electrical control.

Various driving structures in the opening operation means 4 and the fixing operation means 6 are not limited at all.

[0030]

The apparatus according to the present invention is provided with the above-mentioned structure, and the opening operation is performed by sucking as close to the opening edge as possible to the mouth of the cylindrical film. In addition, the opening of the cylindrical film can be reliably performed. Therefore, it is possible to improve the efficiency of the operation and reduce the maintenance operation and the like.

When the tubular film is fixed to the mouthpiece, the suction which has been held with the mouth open is released, and the fixing device is brought into contact with the substantially same position to fix the mouthpiece. Therefore, high-precision and reliable fixing can be performed. This also eliminates the need for the work station to have a two-stage configuration, and does not increase the size and complexity of the device.

In the case where the mutual separation or retreat of the adsorber and the close proximity of the fixing device are performed via an interlocking mechanism, the efficiency of each movement can be improved, and the size of the apparatus can be further reduced. And simplification.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of the apparatus according to the embodiment of the present invention shown in FIG. 1 with a fastener supply means omitted;

FIG. 3 is a plan view showing the apparatus according to the embodiment of the present invention shown in FIG.

4A and 4B are explanatory diagrams of the operation of the opening operation means, in which FIG. 4A shows the state before the opening of the tubular film, and FIG. 4B shows the state after the opening.

FIG. 5 is an explanatory diagram of the operation of the fixing operation means.

FIG. 6 is a perspective view showing a bag manufactured in the present invention.

FIG. 7 is a side sectional view showing an embodiment of the present invention in which an interlocking mechanism has a different structure.

FIG. 8 is a front view of the apparatus according to the embodiment of the present invention shown in FIG. 7, with fastener supply means omitted;

[Description of Signs] 1 Slipper attachment device 2 Set part 3 Suction unit 4 Opening operation means 5 Fixing unit 6 Fixation operation means 7 Supple supply means 18 Supplements 18a Fixing allowance 35 Interlocking mechanism

──────────────────────────────────────────────────続 き Continuing on the front page (72) Kengo Shimaji, Inventor Kengo Shimaji 163, Morikawaramachi, Moriyama-shi, Shiga Prefecture Inside Shiga Laboratory Co., Ltd. (72) Akira Yamamoto 2-13-44 Fujinosato, Ibaraki-shi, Osaka Gunze SOZ Business Co., Ltd. In the headquarters (72) Inventor Kozo Hirai 2-13-44 Fujinosato, Ibaraki-shi, Osaka Gunze SOZ Business Headquarters (56) References JP-A-53-779 (JP, A) JP-A-5-131573 (JP) , A) (58) Field surveyed (Int. Cl. ⁶ , DB name) B31B 1/84 321 B31B 1/90 321

Claims (2)

(57) [Claims] A mouthpiece (1) is attached to the mouth of a cylindrical film (W).
8) In a device for mounting, a set portion (2) for holding a tubular film (W), and a pair of two outer surfaces near a mouth of the tubular film (W) held on the set portion (2). Of the tubular film (W) held by the set portion (2), the opening operation means (4) for enabling the suction devices (3) to move away from each other and to approach each other. A tool supply means (7) for inserting the fixing margin (18a) of the fitting (18) and a contact surface (5a) corresponding to the periphery of the fixing margin (18a) of the fitting (18) are paired. It comprises a fixing device (5) constituted by a combination and fixing operation means (6) for enabling these fixing devices (5) to approach and separate from each other, and the two adsorbers (3) and the two fixing devices (5) are provided. ) Are in contact with the tubular film (W) at the closest possible opening edges of the mouth. The cylinder is characterized in that the fixing operation means (6) enables the two fixing devices (5) to approach each other only when the opening operation means (4) separates the two adsorbers (3) from each other. Attaching device for film-shaped mouthpieces. 2. The opening operation means (4) and the fixing operation means (6) are connected by an interlocking mechanism (35), and both adsorbers (3) move away from each other or retreat from the set part (2). 2. The device according to claim 1, wherein the fixing devices are arranged so as to be close to each other.