JPH09254930A - Opener for bag with fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a structure and accelerate treatment by interlocking opening a fastener of a bag and packaging into the bag. SOLUTION: A mouth of a bag 11 is held by a lip member 14 and a holding member 9, and a hopper 3 lowers in a held state. The hopper 3 comes into contact with the lip member 14 for rotating the lip member 14 in a farther direction. Fasteners 11a, 11b of the bag 11 are opened by rotating the lip member 14. The hopper 3 fills contents into the bag 11 with the fasteners 11a, 11b opened. Thus opening of the fasteners can be interlocked with filling of the contents.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening device for automatically opening a zipper bag having a zipper provided at the bag mouth such as a stand pack.

[0002]

2. Description of the Related Art A bag having a zipper at the bag mouth is hygienic because the zipper keeps the seal tight, so that tea leaves such as green tea, black tea, oolong tea, coffee powder, powdered seasoning, and It is often used as a packaging bag for food such as rice and wheat. This bag chuck firmly closes the bag mouth by fitting a pair of convex and concave chucks to each other. In order to fill the contents in such a bag with a chuck, it is necessary to separate the chuck in advance to bring it into an open state.

Japanese Utility Model Publication No. 63-33773 describes a conventional device for opening this bag with a zipper. This device moves two pairs (four) of suction cups that are adsorbed from the outside to the bag mouth portion of the bag body above the chuck and the opposing suction cups toward and away from each other, and moves each suction cup up and down. A rod member to be rotated, a pair of openable and closable opening claws that clamp the upper end of the bag opening opened by rotating the suction cup upward, and the bag opening is opened while the bag opening claw is moved up and down. And a drive mechanism for rotating in the direction.

In such a conventional device, the suction cup sucks the bag mouth of the bag body from the outside by the operation of the rod member, and the suction cup rotates upward in this suction state, so that the bag mouth of the portion above the chuck is rotated. open. Then, by the drive of the drive mechanism, the bag opening claw holds the upper end portion of the bag mouth. Then, the suction cup releases the suction from the bag mouth and separates from the bag body. After the suction cups have separated, the pair of bag opening claws move in the separating direction while holding the bag mouth, which causes the chuck to come out of the fitted state, so that the bag mouth is completely opened and the contents are filled. It will be possible.

[0005]

The above-mentioned conventional apparatus requires a dedicated member including a suction cup, a rod member, a bag opening claw, and a drive mechanism for opening the chuck. In addition to the original member for performing the packaging process for the bag, such as filling the contents, replacing the gas in the bag, and closing the bag mouth, it is necessary to incorporate a dedicated member for opening into the filling and packaging apparatus. For this reason, the structure of the filling and packaging apparatus becomes complicated, the control becomes difficult, and the size becomes large.

Further, these dedicated members including the suction cup, the rod member, the bag opening claw, and the drive mechanism are used only for opening the zipper of the bag body, and are used for filling the contents and gas inside the bag body. There is no involvement in packaging processing such as replacement and sealing of bag mouths. For this reason, the opening process of the chuck is independent of the packaging process, the operation associated with the packaging process cannot be performed, and the packaging process cannot be speeded up.

The present invention has been made in consideration of such conventional problems, and an original packaging process such as filling of contents into a bag is not required without a dedicated member for opening the chuck. The function of chuck opening can be added to the mechanism,
Accordingly, it is an object of the present invention to provide an opening device for a bag body with a chuck, which enables the packaging process for the bag body and the chuck opening to be linked with each other, and which can also simplify the structure of the filling and packaging device.

[0008]

An opening device for a bag body with a zipper according to the present invention which achieves the above object comprises a pair of lip members rotatable in a direction for opening and closing a bag mouth of the bag body, and a pair of the lip members. Between the holder and the lip member of the holder, which has a holding member that is spring-biased so as to hold the bag mouth of the bag body between the holder and the holder, and the bag is contacted with the lip member. It is characterized in that it is provided with a hopper that rotates the lip member in the direction in which the bag mouth of the body opens and that fills the inside of the bag with contents.

In the above structure, the spring-biased holding member presses against the lip member to hold the bag mouth of the bag body. In this holding state, the hopper enters between the lip members and comes into contact with the lip members, thereby rotating the lip members in the direction of opening the bag mouth. As a result, the zipper at the bag mouth part separates from each other and the closed state is released,
The bag mouth opens. Then, the hopper fills the bag with the contents.

In such a structure, the holder of the bag is held by the holder for holding the bag and the hopper for filling the bag with the contents, so that the chuck of the bag is opened. A dedicated member for this is unnecessary. Moreover, since the opening of the chuck can be linked to the packaging process for the bag body, these processes can be performed quickly.

According to the present invention, in addition to the holder and the hopper described above, a pressing member for sandwiching an appropriate portion of the bag body in the open state from both sides, and a portion below the portion sandwiched by the holding member that has entered the bag body in the open state. A gas nozzle for injecting gas into the bag body may be further provided.

The pressing member in this structure sandwiches the bag body, and in this sandwiched state, the gas nozzle injects gas into the bag body. The injected gas does not move above the pressing member, whereby the bag body is filled with the gas and the bag body is inflated. Therefore, the subsequent filling of the contents can be smoothly performed.

[0013]

1 to 7 show an embodiment of the present invention. As shown in FIGS. 1 to 4, this opening device includes a holder 10, a hopper 3, a pair of pressing members 35, and a gas nozzle 8. The holder 10 holds the zipper bag 11 (bag 11) in a suspended state. The hopper 3 opens the bag mouth of the bag body 11 suspended from the holder 10 to release the closed state of the chucks 11a and 11b provided at the bag mouth portion and fills the bag body with contents. The pair of pressing members 35 sandwich the bag 11 from both sides, and the gas nozzle 8 injects gas into the bag to inflate the bag 11.

The bag body 11 filled with the contents is formed of a gas barrier packaging material, and a pair of chucks 11a, 11 are fitted in the upper and lower portions of the bag body 11 so as to be fitted in a concave and convex shape.
b is attached. Further, a folding portion is formed on the lower surface of the bag body 11, and the bag body 11 is supplied to the opening device in a folded state and with the chucks 11a and 11b closed.

5 to 7 show a holder 10, a mounting frame 12 fixed to a supporting member such as a filling and packaging device by bolts, a supporting frame 13 extending from the mounting frame 12, and a bag body as will be described later. A pair of lip members 14 for holding 11 and a holding member 9 attached to the back side of each lip member 14 are provided. The lip members 14 face each other by being attached to a shaft frame 15 that is rotatably stretched around the support frame 13 in a parallel state. The lip member 14 is integrally rotated in the opening / closing direction of the bag body 11 by the rotation of the shaft frame 15. A spring 16 is stretched over the lip member 14 so that the lip member 14 is urged toward each other. Then, by pressing the lip member 14, the entire body rotates against the spring force of the spring 16 as shown by the chain line in FIG. 7, and this rotation causes the bag body to open, as will be described later. The fitting of the chucks 11a and 11b is released.

The sandwiching member 9 is attached to the back side of each lip member 14 so that the sandwiching member 9 and the lip member 14 form a bag body 11.
The bag mouth is sandwiched (see FIGS. 1 to 4). In order to perform this clamping, the clamping member 9 has a torsion spring 9a on its axis.
Is wound around and is urged by the torsion spring 9a in the contact direction with the lip member 14 to be pressed against the back surface of the lip member 14. A separating roll 9b for separating the holding member 9 from the pressure contact with the lip member 14 is attached to the upper portion of the holding member 9. By pressing the separating roll 9b, the lower portion of the sandwiching member 9 is separated from the contact with the lip member 14, and thereby the sandwiching of the bag body 11 is released. A releasing member 30 is arranged to press the separating roll 9b. The releasing member 30 is composed of a releasing rod 32 arranged at a position facing each separating roll 9b, and a releasing cylinder 31 for advancing and retracting the releasing rod 32 (see FIGS. 1 to 4).

A pair of pulling rods 1 is provided at a facing portion of the holder 10 which is orthogonal to a portion where the lip member 14 is disposed.
7 are arranged. This pull rod 17 is rotatably hung on the support frame 13, and the rod shaft 1
A torsion spring 19 is wound around 7a. As shown by the solid line in FIG. 6, the lower part of the pull rod 17 has entered the bag mouth of the bag body 11, and the spring force of the torsion spring 19 pulls the bag body 11 in a direction orthogonal to the lip member 14. Acts like. As a result, the bag mouth of the bag body 11 can be brought into a favorable tension state. In addition, the pull rod 1
A link rod 18 is connected to the rod shaft 17a of No. 7, and when the link rod 18 is rotated, the pulling rods 17 approach each other as shown by the chain line in FIG. Can enter the bag mouth of the body 11.

As shown in FIGS. 1 to 4, the hopper 3 is arranged above the lip member 14 of the holder 10. The hopper 3 is driven so as to enter and retract between the lip members 14. In order to perform this drive, the hopper 3 is the hopper cylinder 3
It is connected to 7 pistons. By driving the hopper cylinder 37, the hopper 3 enters into the lip member 14 and abuts against the lip member 14, whereby the lip member 14 is opened in the direction of opening the bag mouth of the bag body 11, as shown in FIG. Rotate.

The hopper 3 is originally a member for filling the bag body with contents, and therefore the hopper 3 is connected to a feeder (not shown). By supplying the contents from the feeder, the hopper 3 fills the bag with the contents.

The pair of pressing members 35 are chucks 11a,
The portion of the bag body 11 below 11b is sandwiched from both sides, and is arranged so as to be located on both sides of the bag body 11. Each pressing member 35 is attached to the tip end portion of the piston rod of the pressing cylinder 36, and the bag body 11 is sandwiched by the driving of the cylinder 36.

The gas nozzle 8 is connected to a gas source (not shown) of air, nitrogen gas or the like, and descends to enter the bag body 11 and eject gas such as air into the bag body 11. This injection is performed on a region below the pressing member 35 with the pressing member 35 sandwiching the bag body 11. Since the bag body 11 is sandwiched by the pressing member 35, the injected gas cannot escape upward, and the bag body 11 is filled and the bag body 11 is inflated by the gas. As a result, as shown in FIG. 3, even if the lower surface of the bag body is folded, the folding is eliminated and the bag body 11 can be easily filled with the contents.

The above opening device is used by being incorporated in a filling and packaging device for performing packaging processing such as filling the contents of the bag and sealing the bag mouth. 8 and 9 show an example of a filling and packaging apparatus in which the opening device is incorporated. This device is a vertical filling and packaging device that performs a packaging process while moving the bag body 11 in the vertical direction. The base 1 is formed in a vertical shape, and the bag body supply unit 2, the hopper 3, Holder 1
0, the transport unit 4 is arranged.

The bag supply unit 2 is arranged on the side surface of the base 1, and includes a bag stand 21 on which the bags 11 are stacked and a bag stand cylinder for moving the bag stand 21 up and down. 22
And a bag supply member 23 for taking out the bag body on the bag table 21 by suction. The bag supply member 23 is attached to a side portion of the base 1, and the pickup arm 24 that takes out the uppermost bag body 11 on the bag stand 21 by suction and the bag body taken out by the pickup arm 24 is transferred to the holder 10. And a supply arm 25 that operates.

FIG. 10 shows this bag body supply section 2, in which the supply arm 25 is arranged on the same axis and has first and second arms 25a and 25b which adsorb from both sides of the bag mouth of the bag body 11. are doing. In this case, the second arm 25b is connected to the supply member 26, and the operation of the member 26 advances and retreats with respect to the first arm 25a.

The supply member 26 includes a cam plate 26b having a cam groove 26a formed therein, and a rotation motor 26c for rotating the shaft end of the supply arm 25. Cam plate 2
A pin 25c extending from the second arm 25b is engaged with the cam groove 26a of 6b, and the pin 25c travels along the cam groove 26a, whereby the second arm 25
b moves in the separating direction from the close contact state with the first arm 25a, and the bag body 11 above the chucks 11a and 11b.
Open the bag mouth of. When the bag body 11 is supplied, the chucks 11a and 11b of the bag body 11 are in a fitted state, and the chucks 11a and 11b are not opened. The entire supply arm 25 rotates to the horizontal position as shown by the chain line in FIG. As a result, the supply arm 25 holds the bag body 11 with the bag mouth portion opened, in the holder 10
After that, the process is performed by operating vertically.

The holder 10 shown in FIGS. 5 to 7 is attached to the upper portion of the base 1. On both sides of this holder 10,
A release member 30 is arranged. As described above, the releasing member 30 includes the releasing rod 32 that faces each of the separating rolls 9b of the holder 10, and the releasing cylinder 32 attached to the base 1 to move the releasing rod 32 forward and backward. When the releasing cylinder 31 operates, the releasing rod 32 advances and presses the separating roll 9b, whereby the holding member 9 separates from the lip member 14, and the bag mouth is held by the lip member 14 and the holding member 9. Is released.

Further, a pair of pressing members 35 is arranged below the holder 10. The pressing member 35 is attached to a pressing cylinder 36 fixed to the base 1, and operates so as to sandwich a portion of the bag body 11 below the chucks 11a and 11b from both sides. By the operation of the pressing member 35, the upper portion of the bag body 11 is closed, and the gas injected into the bag body 11 is prevented from escaping.

The hopper 3 is provided above the holder 10. The hopper 3 is connected to a piston rod of a hopper cylinder 37 attached to the base 1, and is moved up and down by driving the hopper cylinder 37. As the hopper 3 moves downward, its lower end portion enters between the lip members 14 of the holder 10.
The lower end portion of the hopper 3 contacts the lip member 14,
The pair of lip members 14 are rotated in directions away from each other. As a result, the bag 11 is held in the holder 10 and the chucks 11a and 11b are disengaged from each other to open the bag mouth. Therefore, it becomes possible to fill the bag 11 with the contents.

A feeder 38 is connected to the hopper 3, and a measuring device 39 is provided on the feeder 38. The weighing device 39 weighs the content so that the content is a predetermined amount, and the feeder 38 supplies the weighed content to the hopper 3. Then, the hopper 3 guides the contents to the bag body 11 and fills the contents.

The gas nozzle 8 for injecting an inert gas or air into the bag 11 is arranged above the holder 10 so as to be vertically movable, like the hopper 3 described above. Then, the gas nozzle 8 descends to enter the bag body 11 and injects an inert gas, air or the like into the bag body 11.

The transfer section 4 is provided below the base 1. The carrying section 4 includes a vertically moving cylinder 41 which is erected on the bottom of the base 1, a bracket 42 which is attached to the vertically moving cylinder 41 and moves vertically, a pair of seal members 43 attached to the bracket 42, and a pair of seal members 43. Holding member 44
And The seal member 43 closes the bag mouth of the bag body 11 by heat sealing or ultrasonic sealing,
The holding member 44 holds the bag mouth of the bag body 11 from both sides. The holding of the bag body 11 by the holding member 44 is performed on the chucks 11a and 11b. Therefore, the chucks 11a and 11b of the bag body 11 are held by the holding member 44.
It is fitted with each other by sandwiching.

The seal member 43 and the holding member 44 move up and down together with the bracket 42, but a guide shaft 45 is provided upright on the base 1 in order to perform this up and down movement stably. The bracket 42 is provided with a guide block 46 into which the guide shaft 45 is inserted. A discharge chute 7 is arranged below the seal member 43 and the holding member 44.

Next, the operation of this embodiment will be described with reference to FIGS.
This will be described with reference to FIG. The bag body 11 is formed in a bag shape in which only the bag mouth is opened by a gas barrier packaging material, and is placed on the bag stand 21 in a folded state. or,
The chucks 11a and 11b of the bag body 11 are fitted and the bag mouth is closed.

As shown in FIG. 8, the bag base 21 of the bag body supply unit 2 on which the bag body 11 is placed is raised, and the uppermost bag body 11 on the bag base 21 is attracted by the pickup arm 24. Take it out. The first and second arms 25a, 2 of the supply arm 25
5b adsorbs the bag mouth of this bag from both sides, and rotates upward in this adsorbed state. During this movement, the first and second arms 25a, 25b separate from each other, which causes the chuck 11a,
The bag mouth portion above 11b is opened.

On the other hand, in the releasing member 30, the releasing rod 32 advances to press the separating roll 9b of the holder 10 to separate the holding member 9 and the lip member 14 from each other. Chuck 11
The bag body transferred by the supply arm 25 with the bag mouth portion above a and 11b opened is inserted between the holding member 9 and the lip member 14 at the bag mouth portion. When the release member 30 stops operating, the lip member 14 and the holding member 9 hold the bag mouth portion. By this, bag 1
1 is held by a holder 10 in a suspended state. After this clamping, the supply arm 25 pivots downward and retracts, and the next bag 11 is taken out.

FIG. 1 shows a state in which the bag body 11 is suspended by the holder 10, and in this state, the hopper cylinder 37 is used.
Will be shortened. As a result, the hopper 3 descends and enters between the lip members 14 of the holder 10. By this entry, the lower end portion of the hopper 3 comes into contact with the lip member 14.

FIG. 2 shows this state, in which the lip member 14 rotates in the separating direction against the urging force of the spring 16 by the contact of the lower end portion of the hopper 3. By this rotation in the separating direction, the chucks 11a and 11b of the bag body 11 are disengaged from each other and the bag mouth is opened. After the opening of the bag mouth, the hopper cylinder 37 is extended so that the hopper 3 moves up and retracts from the lip member 14.

Thereafter, as shown in FIG. 3, the gas nozzle 8
Moves down and enters the bag body 11, and in conjunction with this, the pressing member 35 sandwiches the bag body 11 from both sides. By this, bag 1
1 and the gas nozzle 8 are sandwiched and held by the pressing member 35. Then, the gas nozzle 8 injects an inert gas or air into the bag body 11. At this time, since the bag body 11 is sandwiched by the pressing member 35,
The injected gas cannot move above the pressing member 35. Therefore, the inside of the bag body 11 is filled with gas and the bag body 11 is inflated. As a result, the folded state is released, and the contents can fall freely into the bag body 11.

After the bag body 11 is inflated, the pressing member 35 is retracted from the sandwiched state of the bag body 11. Then, the cylinder 37 for the hopper is again shortened, whereby the hopper 3
Descends. This lowering causes the hopper 3 to move to the lip member 1
4 is rotated in the separating direction to open the bag mouth of the bag body 11 again.

FIG. 4 shows this state. In this state, a predetermined amount of the content A is dropped from the hopper 3 into the bag body 1 via the feeder 38, and filling is performed. At the time of this filling, since the bag body is inflated by the gas from the gas nozzle 40 as described above, and the folded state is released, the content A can be smoothly dropped into the bag body 11.

After filling the contents, the hopper 3 rises and the gas nozzle 40 rises. As a result, the processing on the upper side is completed, the vertical movement cylinder 41 is extended, and the seal member 43 and the holding member 44 are integrally lifted.

The raised holding member 44 sandwiches the chucks 11a and 11b of the bag body 11, and the sandwiching force causes the chucks 11a and 11b to be fitted to close the bag mouth. In this state, the release member 30 is driven again to separate the holding member 9 from the lip member 14. As a result, the holder 10 releases the holding of the bag mouth portion. Even in this release, since the holding member 44 sandwiches the bag body 11, the bag body 11 does not drop accidentally.

After that, the vertical movement cylinder 41 is shortened to lower the bag body 11. At this lowered position, the seal member 43 is driven to seal the bag mouth of the bag body 11. A package in which the bag mouth is closed is produced by this seal, and the seal member 43 and the holding member 44 simultaneously release their operations. As a result, the bag body 11 falls on the discharge chute 7 and is discharged. Immediately after the bag cylinder 11 is lowered by the vertical movement cylinder 41, the bag body supply unit 2 is operated to continue the process for the bag of the next stage, and thereafter, the same process is continuously performed.

In this embodiment, the hopper 3 for filling the bag 11 with the contents is lowered with respect to the holder 10 for holding the bag 11 in order to perform the packaging process on the bag 11 so that the chuck 11a is held. , 11b for opening,
There is no need for a dedicated member for opening the chuck. Therefore, the structure of the filling and packaging device can be simplified, and the size and control of the device can be simplified. Moreover, since the opening of the chuck can be associated with the packaging process for the bag body 11, the packaging process can be performed quickly and the amount of treatment can be dramatically increased.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, the mechanism for moving the hopper 3 toward the holder 10 may be a combination of a cam and a motor instead of a cylinder. Further, the gas nozzle 8 may inject compressed air, which allows the gas nozzle 8 to operate at a low cost. Further, when filling the contents, a vibration device may be provided to fill the contents while vibrating the bag body, which can prevent crosslinking during filling.

[0046]

The zipper bag opening device of the present invention comprises:
Since the chuck is opened by the holder that holds the bag and the hopper that fills the bag with the contents for packaging the bag, a dedicated member for opening the chuck is not required. Therefore, the structure of the filling and packaging device can be simplified, and the size and control of the device can be simplified. Further, since the opening of the chuck can be associated with the packaging process for the bag body, the packaging process can be performed quickly, and the amount of treatment can be dramatically increased.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a front view when a chuck is opened.

FIG. 3 is a front view showing a state where the bag body is inflated.

FIG. 4 is a front view when the bag body is filled with contents.

FIG. 5 is a plan view of a holder.

FIG. 6 is a side view of the holder.

FIG. 7 is a front view of a holder.

FIG. 8 is a front view of the vertical filling and packaging device.

FIG. 9 is a side view of the vertical filling and packaging device.

FIG. 10 is a front view of a bag body supply unit of the vertical filling and packaging apparatus.

[Explanation of symbols]

 3 Hopper 8 Gas Nozzle 9 Clamping Member 10 Holder 11 Bag Body 14 Lip Member 35 Holding Member

Claims (1)

[Claims] 1. A pair of lip members rotatable in a direction for opening and closing the bag mouth of the bag body, and a holding member which is spring-biased so as to hold the bag mouth of the bag body between the lip members. The holder is driven to move in and out between the holder and the lip member of the holder, and the lip member is rotated in the direction in which the bag mouth of the bag body is opened by the contact with the lip member, An opening device for a bag with a chuck, comprising: a hopper for filling contents.