JP2002173113A - Method and device for forming three-dimensional packaging - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a three-dimensional packaging bag by sealing upper and lower opening edges of the packaging bag cruciformly. SOLUTION: In a bagging machine, the packaging bag 20 is supported by both clamps 11, and fed together with a rotor 10 by one pitch, and a work to be packaged in the packaging bag 20 through a funnel-shaped hopper 21 at the stop position 1. At the stop position 2, a pair of seal bars 22 and 23 hold and seal the opening edges of the packaging bag 20, and when the packaging bag 20 is stopped in a proximal section, a pair of claw pieces 36 and 37 are lowered in the packaging bag 20, and separated from each other to tighten a mouth of the packaging bag, and the claw pieces 36 and 37 rotate the packaging bag by 90 deg. in an unchanged manner, and the clamps catch the opening edge of the packaging bag again, and carry the packaging bag to the position of the seal bars 22 and 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for sealing the upper opening edge of a wrapper filled with an article so that the wrapper becomes three-dimensional.

[0002]

While the belt-like film is transported while being tubed so as to surround the filling nozzle,
The transfer tube film is continuously filled with the articles by the nozzle, and the tube film is equally spaced by a seal bar on one side along the X axis and a seal bar on the other side along the Y axis. Since the package formed by separating and sealing is formed in a three-dimensional shape by crossing the upper and lower sealing edges, it is generally popularly called a tetrapot pack, and is used for packaging liquid such as milk. . However, when observing the above-mentioned packaging method, the tube film slides outside the nozzle and moves,
When packaging viscous or oily packages, there is a problem that these packages adhere to the inner surface of the film and hinder the complete welding of the sealed portion.

[0003]

A wrapping method for solving the above-mentioned problem, comprising: transferring a wrapper supported by sandwiching both side edges with one pair of clamps together with the two clamps; After filling the package into the wrapper opening at the stop position, the bagging machine is configured to heat seal the opening edge of the wrapper at the second stop position. Insert the nail pieces into the opening of the wrapper bag that is clamped by both clamps, and open the rim of the bag by separating the two nail pieces.
Tensioning along the Y-axis crossing the X-axis of the arrangement of the two clamps, and simultaneously releasing the zipper from the two clamps, and then rotating the zipper with the claws to a position along the X-axis; The bag mouth is re-catched by the two clamps which are waiting at an enlarged interval.

On the other hand, an apparatus for solving the above-mentioned problem is a one-to-one system.
A pair of clamps sandwiching and supporting both side edges by a pair of clamps is intermittently transported along the endless track and one pitch at a time together with the two clamps, and is covered in a wrapper opening at one stop position on the transport track. After filling the package, in the bagging machine such that the opening edge of the wrapper is heated and sealed at the two stop positions, the wrapper stops while the wrapper stops at an intermediate section between the two stop positions. A pair of claw pieces which project into the zipper from above at the same time when the two clamps reach the intermediate section, and a bag mouth of the zipper. The two clamps are separated from each other by means of separating both claws, which are tensioned along the Y-axis crossing the X-axis, and the tensioned bag mouth is integrated with both claws.
It comprises means for rotating to a position along the X-axis, means for pulling out both claws from the bag mouth after the rotation of the wrapper, and means for re-clamping the bag mouth with the two clamps immediately before the pulling action.

[0005] In this configuration, the pair of claws projecting into the zipper from above at the same time when the two clamps reach the intermediate section, and the bag mouth of the zipper is moved to the arrangement of the two clamps.
Since it is tensioned in the direction crossing the X axis and the tensioned bag mouth is rotated together with both claw pieces to a position along the X axis,
Eventually, the bottom seal direction of the wrapper and the seal direction of the mouth of the wrapper are crossed by the rotation, so that the shape of the package is three-dimensional. A bag filling machine, which is a basic configuration of a method and an apparatus for carrying out the present invention, fills a wrapper with an article to be wrapped through a nozzle inserted into a mouth of the wrapper or a bosh type hopper. While the belt-like film is conveyed while being formed into a tube so as to surround the nozzle, the adhesion of the object to be packaged particularly to the inside of the bag mouth is compared with the method of continuously filling the object to be conveyed into the above-mentioned transport tube film with the nozzle. The phenomenon improves.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A bag filling machine shown in FIG. 1 has eight sets of clamps 11 consisting of one pair on the periphery of a disk-shaped rotor 10.
Are supported via the arms 12 respectively. Each pair of arms 12 is supported by the disk 10 via a pivot pin 13, and the force of a spring 16 for urging the arms 12 in the approaching direction is such that the lever 14 presses the lever 14 against the circumferential cam 15. work. Therefore, when the rotor 10 is intermittently rotated one pitch at a time integrally with the main shaft 17 by the power transmitted from the motor, the circumferential cam 15 also rotates one pitch clockwise integrally with the rotor 10, and then the rotor 10 is stopped. In the meantime, the full circumference cam 15 reverses by one pitch and returns to the original position.
At this time, the peripheral curve of the full circumference cam 15 moves the sector gear 18 through the lever 14 to change the interval between the pair of clamps 11.

In the above-mentioned bagging machine, the wrapper 20 is connected to both clamps 11 in the region where the crank interval on both sides is the largest.
Since it is supplied in between, the pair of clamps 11 sandwich both side edges of the same package. Then, as the rotation of the rotor 10 advances one pitch at a time, the distance
The mouth of 0 is widened, and the article to be packaged is filled in the sachet 20 through the morning glory hopper 21 at the 1 stop position. Thereafter, the opening of the wrapper 20 is tightened by the increase in the interval between the two clamps, and the pair of seal bars 22 and 23 press and seal the opening edge of the sack at the second stop position.

In the intermediate section between the above-mentioned stop positions (1) and (2), the wrapper can be turned, and an embodiment of the direction changing mechanism 30 for performing this operation is as shown in FIGS. 2 and 3. That is, the gear 32 is rotatably supported in the middle of the horizontally long casing 31 in the mechanism, and the upper rack teeth 33 and the lower rack teeth 34 are arranged above and below the gears by being supported by groove-shaped guides 35, respectively. Further, a pair of claw pieces 36 and 37 hang down from the both rack teeth,
A slider 39 supported on a rod-shaped cylinder 38 provided between both side walls of the casing is connected to the lower rack teeth 34. An electromagnet piston 40 disposed in the cylinder 38 reciprocates in the cylinder due to a pressure difference formed on both sides thereof. A slider 39 which is attracted by the magnetic force of the piston 40 and is integrally displaced with the piston, has a piston 39 Is transmitted to the lower rack teeth 34, and the movement of the lower rack 34 is transmitted to the upper rack 33 via the gear 32, so that the pair of claw pieces 36 and 37 open and close in synchronization. This corresponds to the displacement between the claw pieces 36 and 37 shown in solid lines and the claw pieces 36a and 37a shown in phantom lines in FIG.

In FIG. 2, a pair of clamp arms 12
When the wrapping bag 20 supported by the frame stops at the intermediate section, the frame 40 integrally lowers the supporting casing 31 and inserts a pair of claw pieces 36 and 37 into the opening of the wrapping bag 20 (see step 3 in FIG. 11). ). A plan view of such a state is as shown in FIG. 5. In this case, the arrangement of the pair of claw pieces 36 and 37 is in the Y-axis direction crossing the X-axis in the arrangement direction of both clamps 11. The sequencer continues in Figure 6
The pair of claws 36 and 37 are separated from each other along the Y-axis to tighten the opening edge of the wrapper 20 (see step 5 in FIG. 11).
At the same time, open the pair of clamps 11 and release the wrapper 20
(See step 4 in FIG. 11). As shown in FIG. 8, a clamp 11 of a general bag filling machine clamps the wrapper 20 by the tension of a coil spring 42 installed in the arm 12, and presses the coil spring 42 by pressing a hammer 45 against an operation pin 44. Since the structure of compressing and releasing the wrapper is adopted, the rotation of the groove cam 46 swings the seesaw rod 47 up and down, and the power is transmitted to the hammer 45 via the rod 48, so that the wrapper from the clamp 11 is released. 20 release timing can be controlled.

As shown in FIG. 2, a lever 51 is fixed to a shaft 50 for supporting the casing 31 on the frame 40.
Since the casing 31 is rotatable with respect to the frame 40 by operating the lever 51, the casing 31 is rotated by 90 degrees with the lever 51 at a timely timing so that the tension opening 41 of the wrapper is closed by both clamps as shown in FIG. The direction is changed to the coaxial position with the arrangement axis X of 11 (see step 6 in FIG. 11), and at the same time, both edges of the wrapper 20 are re-catched by both clamps 11 (see step 7 in FIG. 11).

In FIG. 7, a pair of claw pieces 36 and 37 projecting in both directions support the weight of the packaged object inside by friction with the inner surface of the wrapper 20. As shown in FIG. 4, the gripper 55 is rotatably supported on each of the claw pieces 36 and 37 via the pin 54, and the pulling force of the spring 56 is applied to the gripper 5.
5 As a result, as shown in FIG. 9, the grippers 55 are normally pulled by the springs 56, and support the entire weight of the wrapper 20 sandwiched between the outer edges of the claw pieces 36, 37. Then, the cylinder 6 in FIGS.
When the bar 61 connected to the gripper 0 is moved down by the piston rod 62, the grippers 55 separate from the outer edge 57 of the claw piece against the pulling force of the spring 56.

As shown in FIGS. 4 and 9, both claw pieces 36,
37 is provided with a notch 65 on each of the outer edges, and the clamp is stolen by the two notches 65 so that the clamp is
0 is pinched. That is, the clamps 11 on both sides in FIG.
Is the wrapping bag 2 at the cutout portions of both nail pieces 36 and 37.
0, so that both nail plates 3
6 and 37 can be brought close to each other and pulled upward (see step 9 in FIG. 11), and can be directly conveyed to the sealing means to form a package in which the upper and lower seal portions 70 and 71 are crossed as shown in FIG. can do.

[Brief description of the drawings]

Fig. 1 Top view of bag filling machine

FIG. 2 is a front view of the direction changing mechanism with a front wall removed.

FIG. 3 is a sectional side view of the previous figure.

FIG. 4 is a front view of a direction changing mechanism.

FIG. 5 is an explanatory view showing a pair of claw pieces acting.

FIG. 6 is an explanatory view showing a pair of claw pieces acting.

FIG. 7 is an explanatory view showing a pair of claw pieces acting.

FIG. 8 is a side view of the clamp opening / closing means.

FIG. 9 is an explanatory view of a zipper support by a nail piece.

FIG. 10 is a perspective view of a three-dimensional package.

FIG. 11 is an explanatory diagram of the operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Rotor 11 ... Clamp 12 ... Clamp arm 20 ... Zipper 22, 23 ... Seal bar 30 ... Direction conversion mechanism 32 ... Gear 33, 34 ... Rack teeth 36, 37 ... Claw piece 38 ... Cylinder 39 ... Slider 42 ... Spring 45 ... Hammer 55 ... Grip 56 ... Spring 61 ... Bar 65 ... Notch

Claims (4)

[Claims] 1. A package to be packaged in a wrapping bag which is supported by a pair of clamps with both side edges sandwiched and supported by the clamps, and which is opened at one stop position on the transfer trajectory. In the bag filling machine, the opening edge of the wrapper is heated and sealed at the second stop position, and between the two stop positions, the opening portion of the wrapper holding the pair of claws by the two clamps. At the same time, the opening of the bag is tensioned along the Y-axis crossing the X-axis of the two clamps by separating the two claw pieces, and simultaneously the bag is released from the two clamps. A method of forming a three-dimensional package, comprising the steps of: rotating a wrapper to a position along the X-axis with the two claw pieces; 2. An intermittent transfer of a wrapper supported by sandwiching both side edges by a pair of one pair of clamps along an endless track and one pitch at a time integrally with the two clamps.
After filling the package into the wrapper opened at the stop position of the above, in the bagging machine which heat seals the opening edge of the wrapper at the second stop position, at the intermediate section between the two stop positions. A configuration comprising a direction changing mechanism for changing the direction of the zipper while the zipper is stopped, wherein the directional change mechanism comprises a pair of clamps that project into the zipper from above at the same time when the clamps reach the intermediate section. Claw pieces, a separating means for the two claw pieces for tensioning the bag mouth of the zipper bag along the Y-axis crossing the arrangement X-axis of the both clamps, and the tensioned bag mouth integrally with the two claw pieces. An apparatus comprising: means for rotating to a position along the X-axis; means for pulling out both claws from the bag mouth after the rotation of the wrapper; and means for re-clamping the bag mouth immediately before the pulling action. . 3. The apparatus according to claim 2, wherein each of the pair of claw pieces is provided with a gripper for holding the bag mouth between both outer surfaces of the claw pieces. 4. The apparatus according to claim 2, wherein a steal notch is formed on both outer side surfaces of each of the pair of claw pieces so as to enable the bag mouth to be clamped by both clamps.