KR20100125360A - Pusher in packing device - Google Patents

Abstract

The present invention relates to a pusher of a packaging device that can prevent deformation of the package. An air supply port 53 is formed in the front face 46 of the head portion 36 of the pusher 1 used in the packaging device, and an air suction port 52 is formed in the side portion 43. The air supply port 53 can ventilate the inside and the outside of the bag 2b when the front end of the pusher 1 is inside the bag 2b. The air suction port 52 sucks air from the bag 2b when the front end of the pusher 1 moves in the retracted direction from the inside of the bag 2b so that a gore 57 is formed at the opening end. Works.

Description

PUSHER IN PACKING DEVICE}

The present invention relates to a pusher for use in a packaging device for pushing a package from an open end of a bag to obtain a package.

An apparatus for obtaining a package by using a pusher to push the package into a bag whose one end is in the closed state and the opposite end thereof in the open state, and then closing the end in the open state to obtain the package is known in the art. will be. For example, in the high speed packaging machine described in JP-A 61-160002 (Patent Document 1), the closed end and the opposite end that are heat-sealed by using a plurality of transverse sealers and cutting devices for a cylindrical plastic film Make a pocket with a denial opening end. The bag is pushed into the bag using a predetermined number of packages, and then the end of the opening is heat sealed to obtain a package. In this packaging machine, air suction ports are formed on both sides of the pusher, and when the pusher entering the bag while pressing the packaged body is ejected from the bag, the air inside the bag is discharged from the air suction port. It is also known in the art to draw a gore at the opening end of the bag and to heat seal the opening end to the closed state.

Japanese Utility Model No. 61-160002

In this prior art, the inside of the bag tends to be in a depressurized state when the pusher is withdrawn from the bag. On the other hand, if the package is flexible, such as a disposable diaper or sanitary napkin, and the bag is also formed of a flexible sheet material such as a plastic film or paper, the package is deformed as the bag under reduced pressure is deformed. There is a case. As a result, the package may have a deterioration in function or a deterioration in appearance at the time of use. Moreover, when a package becomes an uneven form, it may become difficult to pile up at the store etc. squarely.

Moreover, in this prior art, it is preferable that the pusher front part enlarges the area so that a to-be-packed body can be pushed to the largest possible area. In this way, if the same pressing force is applied to a large area of the package, the use of the pusher is less likely to damage the package. However, as the area of the front portion of the pusher becomes larger, the inner surface of the bag becomes more tightly adhered to the pusher, so that the bag is hardly deformed to conform to the groove of the pusher even if it sucks air therein. In such a state, it is also difficult to speed up the shape of Gore in the pocket.

Then, this invention makes it a subject to improve on the pusher used by a packaging apparatus so that this problem in a to-be-packaged body or a packaged body can be eliminated.

1st invention and 2nd invention are contained in this invention for solving the said subject. The object of the first invention is to close the opening end while forming a gore on both sides of the opening end after pushing the package from the opening end into a bag having the closing end and the opening end opposite thereto. It is a pusher for pushing the package to be used in the packaging device to obtain a package from the bag and the package.

In such a pusher, the first invention is characterized as follows. The pusher is a reciprocating motion in a direction opposite to the direction in which the package is pushed, and includes a front end that enters the bag while being pressed against the package, a rear end that is the opposite end, and the front end and And a head portion having both sides extending in parallel with each other in a direction for pushing the packaged body between the rear ends. The front end portion has an air supply port through which the inside and the outside of the bag can be vented through the pusher when the front end portion is inside the bag. The both sides have air suction openings that enable the gore to be formed at the opening end of the bag when the front end portion inside the bag moves in the opposite direction.

In one of the embodiments of the first invention, the air supply port at the front end of the head portion is held between any one of the rear end and the rear end between the front end and the rear end. Open to

In another one of embodiment of 1st invention, pressurized air can be supplied in the inside of the said bag from the said air supply port in the said front end part of the said head part.

In the other of embodiment of 1st invention, each of the said both side parts of the said head part has the V-shaped groove extended from the front-end part toward the said rear end, The bottom of the said V-shaped groove has the said air suction opening Is formed.

The object of the second invention in the present invention is to provide a gore on both sides of the opening end after pushing the package from the opening end into the bag having the opening end being the closed end and the opposite end. A pusher for pushing the package to be used in a packaging device which closes the opening end to obtain a package from the bag and the package.

In this pusher, this second invention is characterized as follows. The pusher is a reciprocating motion of the forward movement in the direction of pushing the package and the retraction movement in the opposite direction, wherein the pusher has a front portion that enters into the bag while pressing the package And a head portion having a width direction orthogonal to the reciprocating direction, and a thickness direction orthogonal to the reciprocating direction and the width direction. The head portion is in any one of a state divided into two divided into a first plate and a second plate overlapping in the thickness direction and a state divided into three divided into a first plate and a second plate and a third plate sandwiching it. And a groove having a V-shaped cross section extending in the reciprocating direction and used to form the gore on both sides of the width direction of the first plate, wherein the groove has a vacuum suction source. Openings are formed. In the forward movement of the pusher, the second plate and the third plate push the packaged body together with the first plate to enter the bag, and in the retracting motion of the pusher, the pusher of the packaged body When the loading is finished and the first plate is in the stopped state, the second plate and the third plate retreat and are discharged from the bag, after which the first plate is inserted into the bag from the vacuum suction source. The head portion is formed to be retracted while applying pneumatic pressure. The front part of any one of the said 1st, 2nd, 3rd plate is an air supply which can ventilate the inside and the outer side of the said bag via the said 1st plate, when the said front part is inside the said bag. Have a sphere.

In one of the embodiments of the second invention, the second plate and the third plate are integrated at the rear of the head portion.

In another one of embodiment of 2nd invention, pressurized air can be supplied to the inside of the said bag from the said air supply port.

Since the pusher according to the first aspect of the present invention has an air supply port at the front end portion of the head portion, and an air suction port at both sides, the head portion finishes pushing the package and exits from the bag. When the air inside the opening end is sucked in from the air suction port so as to form a gore at the opening end of the bag, the central portion of the bag into which the package is pushed is unlikely to be in a depressurized state due to the formation of the gore. The deformation of the package can be prevented.

The pusher according to the second aspect of the present invention has a first plate and a second plate, or a first plate and a second plate and a third plate sandwiching the head parts thereof overlapping each other, and the pusher of the package At the end of the loading, the second plate or the second plate and the third plate are withdrawn from the bag, and only the first plate is used to form a gore in the bag. Therefore, even when the bag is in close contact with the head portion when the package is pushed in, the bag at the time of forming the gore is not in close contact with the head portion, so even if the groove for forming the gore in the first plate is deep. The pouch can easily be deformed to enter the groove and conform to the shape of the groove, and can quickly obtain a well-prepared gore.

1 is a perspective view of a bag and a package.
2 is a side view of a packaging apparatus using a pusher.
Fig. 3 is a diagram illustrating the bag filling step in detail by (a) to (e).
4 is a view seen from the direction of the arrow IV-IV in FIG.
It is a figure which shows an example of the use aspect of a pusher.
6 is a perspective view of a bag and a package.
7 is a side view of a packaging apparatus using a pusher.
8 is a perspective view of the pusher.
It is a figure which shows the IX-IX cut line of FIG.
It is a figure which shows the bag filling process in detail by (a)-(f).
It is a figure which shows an example of the use aspect of a pusher.
FIG. 12 is a view similar to FIG. 9 showing an example of a head portion. FIG.
It is a perspective view of the package obtained using the head part of FIG.

Referring to the accompanying drawings, the pusher in the present invention used in the packaging apparatus will be described in detail.

1 is a bag 2 to be used as a pusher 1 (see FIGS. 2 and 3) in the present invention, and a package to be packaged in the bag 2, that is, a plurality of sanitary napkin individual packages ( It is a figure which shows the aggregate 15 which 3) forms. The bag 2 is formed of, for example, a flexible and non-breathable plastic film, and has a closed end 4 on which a heat seal 2d is formed and an open end 5 opposite to the closed end 4. Has Between the closed end 4 and the opening end 5, there is a pair of side part 7 in which the gore 6 is formed. The individual package 3 is a sanitary napkin (not shown) enclosed in an individual bag 3a formed of a flexible sheet material such as a plastic film or a nonwoven fabric, and a predetermined number of things to be packed in the bag 2 are provided. It is arranged in a square direction in the machine direction A (see also FIG. 2) and the crossing direction B orthogonal thereto to form the aggregate 15.

2 is a side view of the packaging apparatus 10 in which the pusher 1 according to the present invention is used. The packaging device 10 includes a first supply step 11 for intermittently supplying the bag 2, and a second supply step for intermittently supplying the aggregate 15 formed by the individual packages 3. 12) and a bag filling step 13 for obtaining a package 14 (see also FIG. 3) composed of the bag 2 and the aggregate 15.

In the 1st supply process 11 of FIG. 2, the bag 2 in which the gore 6 is formed is intermittently supplied from the left side of the figure with the opening edge part 5 forward. In the bag 2, the upper and lower surfaces 8, 9 (see FIG. 1) of the bag 2 are attracted to a pair of upper and lower suction plates 16 for opening and closing so that the opening end 5 is enlarged and opened as shown in FIG. 1. It becomes a state. The suction plate 16 moves to the position shown away from the opening end 5 after covering the opening end 5 which is horizontally moved in the direction of arrow C and is enlarged and opened to the bucket 21a of the plurality of buckets 21. To return. The bucket 21 keeps the opening edge part 5 open, and in the figure, the bag 2 covered by the bucket 21a among the buckets 21 is shown as the bag 2a of an imaginary line. . The bucket 21 is also attached to the disk 22 which rotates intermittently in a clockwise or counterclockwise direction, and the bag 2a covered by the bucket 21a is rotated 180 degrees with the disk 22, It moves from the upper side to the lower side of the figure. In Fig. 2, the bag 2a thus moved is shown as a bag 2b of a virtual line, and the bucket 21a is shown as a bucket 21b.

In the 2nd supply process 12 of FIG. 2, the aggregate 15 is placed in the conveyer 17, it moves to the arrow D direction, and is moved to the lifter 18 contained in the conveyer 17. As shown in FIG. The lifter 18 is to move up and down, and the assembly 15 placed thereon can be moved upwardly as shown by the arrow E. FIG. In the figure, the aggregate 15 thus moved is shown as the aggregate 15a. Moreover, in the conveyer 17, the some pin 17b is attached to the endless belt 17a which moves intermittently in the arrow D direction at fixed intervals, and it slides on the support stand (not shown) of the conveyer 17. In addition, in FIG. The pin 15b is urged from the right side of the drawing, that is, the arrow D direction, to move the assembly 15 in the arrow D direction.

The bag filling step 13 of FIG. 2 includes a pusher 1, a pair of upper and lower push plates 31, a pair of upper and lower seal plates 32, and an endless belt 33. The pusher 1 has a head portion 36 on the left side of the machine direction A, has a rod portion 37 on the right side, and the rod portion 37 moves the pusher 1 to the machine direction A. Is connected to a drive mechanism (not shown) for reciprocating forward retreat at, wherein the illustrated pusher 1 is in a retracted position. In the bag filling step 13, the bag 2b, the bucket 21b on which the bag 2b is covered, the aggregate 15a moved upwards, and the pusher 1 are aligned in the machine direction A. Is in a state of being. The pusher 1 advances toward the left side of the machine direction A, and the head portion 36 presses against the aggregate 15a to push the aggregate 15a into the inside of the bucket 21b. The head portion 36 further advances, pushes the aggregate 15a into the pocket 2b, and then pushes the pocket 2b to the left through the aggregate 15a and peels it off the bucket 21b, thereby providing an endless belt ( 33). Thereafter, the head portion 36 is retracted toward the right side of the machine direction A so as to exit from the bag 2b. At this time, the pair of push plates 31 move to approach in the vertical direction, thereby preventing the bag 2b from moving to the right. When the head portion 36 is withdrawn from the bag 2b, a pair of heated seal plates 32 approach in the up and down direction, with the heat seal 2e across the opening end 5 of the bag 2b. (See FIG. 3). After that, when the pair of seal plates 32 are returned to the illustrated state, the package 14 including the aggregate 15 can be obtained. The package 14 is conveyed to the left side by the endless belt 33.

FIG. 3 shows the bag filling process 13 in detail, but illustration of the lifter 18 and the disc 22 is omitted. In FIG. 3A, the bucket 21b on which the bag 2b is covered, the aggregate 15a, and the pusher 1 are in a state aligned in the machine direction A. In FIG. The head portion 36 of the pusher 1 has a front end 41 and a rear end 42 opposite to the front end 41, and a pair of side portions 43 between the front end 41 and the rear end 42. ) And a pair of upper and lower surface portions 44 and 45 are formed. In addition, the front part 41 is provided with the front surface 46 (refer FIG. 4) which makes contact with the assembly 15a, and the rear end 42 has the back surface 47 which can connect the rod part 37 to it. Is formed. The side surface portion 43 is formed with a V-shaped groove 51 extending from the front end portion 41 toward the rear end portion 42, and an air suction port 52 is formed at the bottom of the V-shaped groove 51. It is. The air suction port 52 is connected to an air suction source (not shown) such as a vacuum pump, and can suck air in the bag 2b at a predetermined time in the bag filling step 13. Moreover, the air supply port 53 (refer FIG. 4) is formed in the front surface 46. As shown in FIG. The air supply port 53 is open to the atmosphere through a pipe (not shown) extending inwardly of the head portion 36 or is connected to a pressurized air source (not shown) such as a compressor. . The pipe in the case of opening to the atmosphere is opened at any one of the rear end portion 42 and the rear end portion 42 between the front end portion 41 and the rear end portion 42 of the head portion 36. Have stage.

In FIG. 3B, the head portion 36 is advanced to push the aggregate 15a into the inside of the tunnel-type bucket 21b, and then to the bag 2b, whereby the bag 2b is a bucket. It is peeled off from (21b).

In FIG. 3C, the head portion 36 in FIG. 3B starts to retreat from the bag 2b while the pair of push plates 31 are approaching. Further, in the head portion 36, suction at the air suction port 52 starts, and the side portion 7 of the bag 2b is in accordance with the shape of the V-shaped groove 51 in the vicinity of the opening end 5. By being deformed so that the gore 57 (refer to FIG. 3E) is beginning to form. The head portion 36 when the front end portion 41 is inside the bag 2b has the air supply port 53 always open to the atmosphere or when the head portion 36 retreats. Since pressurized air can be supplied to the inside of the bag 2b, and the inside and the outside of the bag 2b can be vented, the bag (b) can be retracted by the retraction operation or the vacuum suction action of the head portion 36. The center part of 2b) can be prevented from becoming a decompression state. The aggregate 15 is pushed in the center part. In addition, if the sanitary napkin contained in the individual package 3 has elastic compressive recovery force, the aggregate 15 is in a compressed state when the pusher 1 is pressed forward and pressed, and the volume is reduced, and the pusher is When (1) retreats, it is released from the compressed state and the volume becomes large, and the bag 2b may be in a reduced pressure state, but the pusher 1 has such an air supply port 53, so that it becomes in such a reduced pressure state. It can prevent.

In FIG. 3D, the pair of heated seal plates 32 approach each other with respect to the bag 2b after the head portion 36 has been removed, and the heat seal 2e (Fig. 3 (e) reference] is formed.

FIG. 3E shows the package 14 obtained in the bag filling process 13. The heat seal 2e is formed in the package 14 in addition to the heat seal 2d. In the side surface part 7 of the bag 2 in the package 14, the gore 56 and 57 are formed in the vicinity of each of the heat seals 2d and 2e.

FIG. 4 is a view in the direction of the arrow IV-IV in the head portion 36 shown in FIG. 4 shows a portion of the front face 46 at the head portion 36 of the pusher 1 and the V-shaped groove 51 of the side portion 43. The air supply port 53 is formed in the front surface 46. The V-shaped groove 51 draws a V shape in the horizontal direction and has an air suction port 52 at the bottom. The bag 2b shown in phantom along the V-shaped groove 51 is deformed by the vacuum pressure acting through the air suction port 52, and is in a state of starting to form the gore 57. However, in the pusher 1 which concerns on this invention, even if the vacuum suction operation | movement for forming the gore 57 in the bag 2 starts, the center part of the bag 2 will supply the air from the head part 36. FIG. By being in the state which is open to the air | atmosphere through the sphere 53, or in the state which pressurized air is supplied, it does not become a pressure reduction state. Therefore, the individual package 3 forming the aggregate 15 is not called "when pressed by the bag in a depressed state and the shape is distorted". In addition, since the package 14 itself is not distorted, it is easy to stack the plurality of packages 14 when they are packed or displayed. In the pusher 1, the timing of the start and end of the air suction through the air suction port 52 and the timing of the start and end of the pressurized air supply through the air supply port 53 are controlled for these timings. It is possible by installing a mechanism (not shown) in the packaging apparatus 10. Moreover, in the pusher 1, it is possible to replace the V-shaped groove 51 of an example of illustration with a U-shaped groove and other recessed grooves.

FIG. 5 is a view similar to FIG. 3A showing an example of a use mode of the pusher 1 according to the present invention. In the bag 2b of FIG. 5, the opening end 5 is covered by the bucket 21b, while the closed end 4 enters the inside of the bucket 21b from the left side in the machine direction A. As shown in FIG. The closed end 4 is in a state where the inner surface is exposed and faces the aggregate 15a. When the aggregate 15a is pushed by the pusher 1 and enters the bucket 21b, it contacts the inner surface of the closed end 4 of the bag 2b. As the pusher 1 moves forward, the aggregate 15a enters the inside of the bag 2b, and then comes to the state of FIG. 3 (b). In order to make the bag 2b into the state of FIG. 5, after covering the opening edge part 5 to the bucket 21b, pressurized air is blown toward the bag 2b from the outer side of the closed end 4, and the closed end ( It is sufficient to enter 4) into the bucket 21b from the left side of the figure.

In the aspect of FIG. 5, when the aggregate 15a is pushed into the bag 2b using the pusher 1, air is not confined in the bag 2b in front of the aggregate 15a. One package 14 can be obtained.

The pusher 1 and the packaging apparatus 10 including the same shown so far are suitable for packaging flexible and easily deformable articles such as sanitary napkins and disposable diapers, but can be used for articles that are difficult to deform. to be.

6 is a bag 2 which is an object of use of the pusher 101 (see FIGS. 7 and 8), which is an example of the pusher according to the present invention, and an individual package for a sanitary napkin that is a packaged body packaged in the bag 2. It is a figure which shows the aggregate 15 of (3), and the package 14 in which the aggregate 15 is packaged and the bag 2 is closed. The bag 2 is formed of, for example, a flexible and non-breathable plastic film, and has a closed end 4 on which a heat seal 2d is formed and an open end 5 opposite to the closed end 4. Has Between the closed end 4 and the opening end 5, there is a pair of side part 7 in which the gore 6 is formed. The individual package 3 is a sanitary napkin (not shown) enclosed in an individual bag 3a formed of a flexible sheet material such as a plastic film or a nonwoven fabric, and a predetermined number of things to be packed in the bag 2 are provided. The aggregate 15 is arranged in a square direction in the machine direction A (see also FIG. 7) and in the crossing direction B orthogonal thereto.

7 is a side view of the packaging apparatus 110 in which the pusher 101 according to the present invention is used. The packaging device 110 includes a first supply step 11 for intermittently supplying the bag 2 and a second supply step for intermittently supplying the aggregate 15 formed by the individual packages 3. 12) and a bag filling step 13 for obtaining a package 14 (see also FIG. 6) consisting of the bag 2 and the aggregate 15.

In the 1st supply process 11 of FIG. 7, the bag 2 in which the gore 6 is formed is intermittently supplied from the left side of the figure with the opening edge part 5 forward. In the bag 2, the upper and lower surfaces 8, 9 (see FIG. 6) of the bag 2 are attracted to the pair of enlarged and open suction plates 16 up and down, and the opening end 5 is enlarged and opened as shown in FIG. 6. It becomes a state. The suction plate 16 moves away from the open end 5 after covering the open end 5 of the plurality of buckets 21 with the opening end 5 which is moved horizontally in the direction of the arrow C and becomes an enlarged open state. Return to The bucket 21 keeps the open end 5 in the enlarged open state. In the figure, the bag 2 covered by the bucket 21a among the buckets 21 is shown as the bag 2a of the virtual line. The bucket 21 is also attached to the disk 22 which rotates intermittently in a clockwise or counterclockwise direction, and the bag 2a covered by the bucket 21a is rotated 180 degrees with the disk 22, It moves from the upper side to the lower side of the figure. In FIG. 7, the bag 2a thus moved is shown as the bag 2b of the virtual line, and the bucket 21a is shown as the bucket 21b.

In the 2nd supply process 12 of FIG. 7, the assembly 15 is placed in the conveyer 17, it moves to the arrow D direction, and is moved to the lifter 18 contained in the conveyer 17. As shown in FIG. The lifter 18 is to move up and down, and the assembly 15 placed thereon can be moved upwardly as shown by the arrow E. FIG. In the figure, the aggregate 15 thus moved is shown as the aggregate 15a. Moreover, in the conveyer 17, the some pin 17b is attached to the endless belt 17a which moves intermittently in the arrow D direction at fixed intervals, and it slides on the support stand (not shown) of the conveyer 17. In addition, in FIG. The pin 15b is pushed from the right side to the left side of the figure, that is, in the direction of the arrow D, to move the aggregate 15 toward the lifter 18.

The bag filling step 13 of FIG. 7 includes a pusher 101, a pair of upper and lower push plates 31, a pair of upper and lower seal plates 32, and an endless belt 33. The pusher 101 has a head portion 136 on the left side of the machine direction A, a rod portion 137 on the right side, and the rod portion 137 moves the pusher 101 to the machine direction A. Is connected to a drive mechanism (not shown) that allows the reciprocating motion of the forward motion and the backward motion, and the illustrated pusher 101 is in the retracted position. In the bag filling step 13, the bag 2b, the bucket 21b on which the bag 2b is covered, the aggregate 15a moved upward, and the pusher 101 are aligned in the machine direction A. Is in a state of being. The pusher 101 advances toward the left side of the machine direction A, and the head portion 136 presses against the aggregate 15a to push the aggregate 15a into the inside of the bucket 21b. The head portion 136 is further advanced to push the assembly 15a into the pocket 2b, and to push the pocket 2b to the left through the assembly 15a to the left to remove it from the bucket 21b. ) On the top. Since the head part 136 which has finished pushing in the aggregate 15a has entered into the bag 2b with the aggregate 15a, the head part 136 is discharged | emitted from the bag 2b. Retract toward the right side of the machine direction (A). At this time, the pair of push plates 31 move to approach in the vertical direction, thereby preventing the bag 2b from moving to the right. When the head portion 136 is completely withdrawn from the bag 2b, a pair of heated seal plates 32 approach in the up and down direction, with the heat seal 2e across the opening end 5 of the bag 2b. ) (See Figure 8). After that, when the pair of seal plates 32 are returned to the illustrated state, the package 14 in a state where the bag 2b and the assembly 15a are in close contact with each other can be obtained. The package 14 is conveyed to the left side by the endless belt 33.

FIG. 8 is a perspective view of the pusher 101 shown in the drawing, and FIG. 9 is a sectional view taken along the line IX-IX of FIG. 8. In addition, in FIG. 9, the bag 2b, the upper subplate 152, and the lower subplate 153 when the pusher 101 is in the entered state are removed and the gore 61 is placed in the bag 2b. The pocket 2b 'in which (see FIG. 10) is beginning to form is shown in phantom. In FIG. 8, the head portion 136 of the pusher 101 has a width coinciding with a horizontal reciprocating motion direction coinciding with the machine direction A and an intersecting direction B orthogonal to the machine direction A. FIG. Direction and the height direction T orthogonal to these reciprocating direction and the width direction. In the height direction T, the head part 136 is the main plate 151 which is a 1st plate, and the upper subplate 152 which is a 2nd, 3rd plate which sandwiches the main plate 151 in a sandwich form. The lower subplate 153 is divided into three sections. The main plate 151, the upper subplate 152, and the lower subplate 153 can independently reciprocate in the machine direction A, respectively, and the rear end surface 151b of the main plate 151 has a The main rod 137 is attached to enable the reciprocating motion. The sub rod 138 is attached to the side plate 152b of the upper sub plate 152, and the side plate 153b of the lower sub plate 153 is provided to enable the reciprocating motion. The sub rod 139 is attached. The main rod 137 and each of these sub rods 138 and 139 are connected to a drive source (not shown) such as a piston.

The main plate 151 and each of the subplates 152 and 153 are integrally formed with the main front part 151a and the sub front part 152a which form a front part 141 of the pusher 101. Each of 153a). These main front parts 151a and the sub front parts 152a and 153a are the parts which press-contact the assembly 15 in cooperation with the pusher 101 when it moves forward, and the pressure at that time concentrates on the local part of the assembly 15. FIG. The shape of the front part 141 of the pusher 101 which these front parts 151a, 152a, and 153a are integrally formed so that it may not become a site | part of the aggregate 15 which faces the front part 141 is formed. It is formed to be substantially the same as or slightly smaller than the shape of (19). That is, the largest dimension in the crossing direction B and the height direction T of the front part 141 is the largest dimension in the crossing direction B and the height direction T of the site | part 19 of the assembly 15. FIG. It is almost equal to or slightly smaller than.

The pusher 101 also has a side portion 142 which is formed symmetrically in the cross direction B. As shown in FIG. The side portion 142 includes a main side portion 151c in the main plate 151 and sub side portions 152c and 153c in the subplates 152 and 153, and a front portion 151a in the main side portion 151c. A groove 156 having a V-shaped cross section extending in the machine direction A is formed, and a suction port 157 is formed in the groove 156. The suction port 157 is connected to an air suction source (not shown) such as a vacuum pump. The sub side surface parts 152c and 153c are formed smoothly. An air supply port 158 is formed in the main front part 151a of the front part 141 illustrated in FIG. 9. The air supply port 158 is connected to the air inlet 159 formed in the main rear part 151b of the main plate 151 and is in an open state to the atmosphere.

FIG. 10 shows the bag filling process 13 in detail, but illustration of the lifter 18 and the disc 22 is omitted. In FIG. 10A, the bucket 21b on which the bag 2b is covered, the aggregate 15a, and the pusher 101 are in alignment with each other in the machine direction A, and the portion of the aggregate 15a is formed. 19 and the front part 141 of the pusher 101 face each other.

In FIG. 10 (b), the head portion 136 is advanced to press the entire portion 19 of the assembly 15a and press the assembly 15a to the inside of the tunnel-type bucket 21b. The bag 2b is peeled off from the bucket 21b. When the assembly 15a is pushed into the bag 2b, a part of the head portion 136 enters the bag 2b.

In FIG. 10C, while the main plate 151 is in a stopped state, the upper subplate 152 and the lower subplate 153 are moved by the subrod 138 and the subrod 139. It retracts and exits from the opening edge part 5 of the bag 2b. When the upper subplate 152 and the lower subplate 153 start to retreat, the pair of push plates 31 approach and hold the bag 2b so as not to move the bag 2b.

In FIG. 10 (d), the main plate 151 in FIG. 10 (c) starts to retreat so as to be withdrawn from the bag 2 b, while the pair of push plates 31 are further placed in the bag 2 b. Approaching Further, in the main plate 151, suction at the suction port 157 to the internal air of the bag 2b starts, and the side portion 7 of the bag 2b is provided with a groove (in the vicinity of the opening end 5). By being deformed to conform to the shape of 156, the gore 61 (refer FIG. 10 (f)) is starting to form. The main plate 151 when the front portion 151a of the main plate 151 is inside the bag 2b has a bag (a state where the air supply port 158 (see FIG. 9) is open to the atmosphere). Since the inside and the outside of 2b) can be ventilated, it is possible to carry out the bag by the retraction operation of the main plate 151, the subplates 152, 153, or the suction action of the suction port 157 of the main plate 151. The center part of (2b) can be prevented from going into a reduced pressure state. As a result, it is possible to prevent the aggregate 15 pushed into the central portion thereof from being deformed by suction. In addition, if the sanitary napkin contained in the individual package 3 has elastic compression recovery force, the aggregate 15 will be reduced in volume in the compressed state when the advanced pusher 101 is press-contacted, and the pusher will be When 101 is retracted, it is released from the compressed state to increase the volume, and the bag 2b may be in a reduced pressure state. However, when the pusher 101 has the air supply port 158, it becomes such a reduced pressure state. It can prevent.

In FIG. 10E, the pair of heated seal plates 32 approach each other with respect to the bag 2b after the main plate 151 is removed, and the heat seal 2e [ 10 (f)] is formed. Although not shown, the retracted main plate 151, the upper subplate 152, and the lower plate 153 are automatically adjusted in their positions so that the front portions 151a, 152a, and 153a are shown in FIG. 8. Will be in the same state as

FIG. 10F shows the package 14 obtained in the bag filling step 13. In the package 14, a heat seal 2e is formed in addition to the heat seal 2d of FIG. 6. The heat seal 2e is formed almost in the center of the end face part 62 of the package body 14 in the up-down direction of the figure. In the side surface part 7 of the bag 2 in the package 14, the gore 6 and 61 are formed in the vicinity of each of the heat seals 2d and 2e.

In addition, the state when the gore 61 is formed in the vicinity of the opening edge part 5 in FIG.10 (d) is also shown by FIG. A suction port 157 is formed in the V-shaped groove 156 of the main plate 151 in the head portion 136, and the bag 2b shown in phantom lines acts through the suction port 157. The gore 61 is formed by the vacuum pressure. However, the gore 61 is formed in FIG. 10 after the upper subplate 152 and the lower subplate 153 shown in FIG. 10 are removed from the bag 2b. In the groove 156 at that time, when the vacuum pressure acts and the bag 2b is deformed to conform to the groove 156, it is in contact with the upper subplate 152 and the lower subplate 153 until then by a tension state. The portion at the end is in a relaxed state so that such deformation of the pocket 2b is facilitated. Therefore, in the pusher 101, even if the bag 2b was in close contact with the head part 136 when the assembly 15 was pushed in, the gore 61 can be obtained easily.

Thus, according to this head part 136, the operation | work which makes the gore 61 easily by deforming the bag 2 like an imaginary line along the groove | channel 156, without damaging the aggregate 15a is easy. It is possible to obtain the effect. This head portion 136 makes the opening angle α of the groove 156 in the main plate 151 particularly small, in the cross direction B of the gore 61 formed by the main plate 151. When you want to deepen the depth of the best, you can achieve an excellent effect.

Moreover, in the pusher 101 which concerns on this invention, even if the suction operation | movement for forming the gore 61 in the bag 2 is started, the center part of the bag 2 will be the air supply port of the head part 136 ( Since it is in the state open | released to air | atmosphere through 158, it does not say that it will become a decompression state. Therefore, the individual package 3 forming the aggregate 15 is not called "when pressed by the bag in a depressed state and the shape is distorted". In addition, since the package 14 itself is not distorted, it is easy to stack the plurality of packages 14 when they are packed or displayed. As illustrated in FIG. 8, the air inlet 159 for the air supply port 158 functioning as described above is provided at the rear part 151b of the main plate 151 and the main front part 151a. It may be provided between the main rear part 151b or further rearward than the main rear part 151b. The air inlet 159 may be connected to a pressurized air supply source such as a compressor, and may be used to supply pressurized air to the bag 2b. In the pusher 101, the timing of the start and end of the air suction through the suction port 157 and the start and end of the pressurized air supply through the air supply port 158 are controlled by these control mechanisms. It is possible by providing the packaging apparatus 110 (not shown). In addition, in the pusher 101, it is also possible to replace the groove | channel 156 of an illustration with a U-shaped groove | channel or other concave groove | channel.

In the pusher 101, an air supply port for the bag 2b is also provided in the upper subplate 152 and the lower subplate 153, so that when the subplates 152 and 153 retreat, the bag 2b is provided. Can be prevented from being in a reduced pressure state. The air supply port does not have to be provided in the main plate 151 as shown in the illustrated example, and the main plate 151 and the upper subplate in consideration of the size of the bag 2b and the aggregate 15 or the head portion 136. 152 and the lower subplate 153 can be provided.

In the present invention, it is preferable that the head portion 136 of the pusher 101 is divided into three as shown in the example and has three plates 51, 152 and 153 in the height direction T. As shown in FIG. However, the upper subplate 152 and the lower subplate 153 are integrally connected to each other at the rear of the head portion 136 instead of being a separate member as shown in the example, and thus both subplates 152. 153 may also be able to advance and retreat at the same time. In addition, in the present invention, two main plates 151 and one subplate 152 or 153 are divided into two thicknesses without using either the upper subplate 152 or the lower subplate 153. It is also possible to replace it with the head portion 136.

FIG. 11 is a view similar to FIG. 10A showing an example of a use mode of the pusher 101 according to the present invention. In the bag 2b of FIG. 11, the opening end 5 is covered by the bucket 21b, while the closed end 4 enters the inside of the bucket 21b from the left side in the machine direction A. As shown in FIG. The closed end 4 is in a state where the inner surface is exposed and faces the aggregate 15a. When the aggregate 15a is pushed by the pusher 101 to enter the bucket 21b, it contacts the inner surface of the closed end 4 of the bag 2b. As the pusher 101 advances, the aggregate 15a enters the inside of the bag 2b, and finally comes to the state of FIG. 10 (b). In order to make the bag 2b into the state of FIG. 11, after covering the opening edge part 5 to the bucket 21b, pressurized air is sprayed toward the bag 2b from the outer side of the closed end 4, and the closed end ( It is sufficient to enter 4) into the bucket 21b from the left side of the figure.

In the aspect of FIG. 11, when pushing the aggregate 15a into the bag 2b using the pusher 101, air is not confined in the bag 2b in front of the aggregate 15a, and it is compact. One package 14 can be obtained.

FIG. 12 is a partial sectional view similar to FIG. 9 showing an example of the head portion 136 in the pusher 101 according to the present invention, and FIG. 13 is a view of the package 14 obtained using the head portion 136. Perspective view. The head part 136 of FIG. 12 is divided into two parts, the main plate 151 which is a 1st plate, and the upper subplate 152 which is a 2nd plate. Also in this head portion 136, after the upper subplate 152 is removed from the bag 2b, the gore 61 is used in the bag 2b by using the groove 156 formed in the main plate 151. Is formed. The bag 2b shown by the virtual line in FIG. 12 shows the state when the upper subplate 152 enters the bag 2b, and the bag 2b 'shown by the virtual line is the upper sub. The state in which the plate 152 is withdrawn and the formation of the gore 61 is started is shown. In the package 14 obtained using this head part 136, as shown in FIG. 13, the heat seal 2e formed in the end surface part 62 of the bag 2 in the up-down direction of FIG. It is not in the center of this end surface part 62, but in the position biased downward. Such end surface portion 62 may be used when printing a large pattern or character that is not preferably divided into two minutes by the heat seal 2e.

The pusher 101 and the packaging device 110 including the same illustrated in FIGS. 6 to 13 are also suitable for packaging flexible and easily deformable articles, such as sanitary napkins and disposable diapers, but with respect to articles that are difficult to deform. Of course it can be used.

1: pusher
2, 2a, 2b: pocket
4: closed end
5: opening end
10: packing device
14: Package
15, 15a: package
36: head part
41: shear
42: rear end
43: side
51: V-shaped groove
52: air intake
53: air inlet
57: gore
101: pusher
110: packaging device
136: head portion
141: front
151: first plate (main plate)
152: second plate (upper subplate)
153: third plate (lower subplate)
156: home
157: opening (suction port)
158: air inlet
A: Reciprocating direction (machine direction)
B: Width direction (cross direction)
T: height direction

Claims (7)

After pushing the packaged body from the opening end into the bag having the closed end and the opening end opposite the end, the opening end is closed while forming a gore on both sides of the opening end to close the bag and the packaged end. A pusher for pushing said package to be used in a packaging device for obtaining a package from a sieve,
The pusher is a reciprocating motion in a direction opposite to the pushing direction of the package, and the front end and the rear end of the opposite end, the front end and the A head portion having both sides extending in parallel with each other in a direction for pushing the packaged body between rear ends thereof,
The front end portion has an air supply port through which the inner side and the outer side of the bag can be vented through the pusher when the front end portion is inside the bag, and both side portions are the front end inside the bag. A pusher, characterized in that it has an air suction port that allows the gore to be formed at the opening end of the bag when the portion moves in the opposite direction. The air supply port at the front end of the head portion is open to the atmosphere at any one of the rear end and the rear end of the head portion from the rear end and the rear end. Pusher. The pusher according to claim 1, wherein pressurized air can be supplied into the bag from the air supply port at the front end of the head portion. The said side part of each said head part has a V-shaped groove extended from the front-end part toward the said rear-end part, The bottom of the said V-shaped groove has an air suction in any one of Claims 1-3. A pusher whose population is formed. After the package is pushed from the opening end into a bag having a closed end and an opening end opposite to the end, the opening end is closed while the gore is formed on both sides of the opening end to wrap from the bag and the package. A pusher for pushing the packaged body used in a packaging device for obtaining a sieve,
The pusher is a reciprocating motion of the forward movement in the direction to push the package and the retraction movement in the opposite direction, wherein the pusher is a front portion that enters into the bag while being pressed against the package And a head portion having a width direction orthogonal to the reciprocating direction, a thickness direction orthogonal to the reciprocating direction and the width direction, and
The head portion is in any one of a state divided into two divided into a first plate and a second plate overlapping in the thickness direction and a third divided into a first plate and a second plate and a third plate sandwiching it, On both sides of the width direction of the first plate, grooves of a V-shaped cross section extending in the reciprocating direction and used to form the gore are formed, and the grooves are connected to a vacuum suction source. An opening is formed,
In the forward movement of the pusher, the second plate and the third plate push the packaged body together with the first plate to enter the bag, and in the retracting motion of the pusher, the pusher of the packaged body When the loading is finished and the first plate is in the stopped state, the second plate and the third plate retreat and are discharged from the bag, after which the first plate is inserted into the bag from the vacuum suction source. The head portion is formed to retreat while applying pneumatic pressure,
The front portion of any one of the first, second, and third plates has an air supply port through which the inside and the outside of the bag can be vented when the front part is inside the bag. Pusher. The pusher according to claim 5, wherein the second plate and the third plate are integrated at the rear of the head portion. The pusher according to claim 5 or 6, wherein pressurized air can be supplied into the bag from the air supply port.

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