JPS6231364Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a bag making, filling and packaging device that wraps a packaging film around a cylindrical bag making body, adheres both edges of the packaging film to form a bag body, and wraps the packaging film inside the bag body. The present invention relates to a device for preventing the occurrence of wrinkles that occur when the bag opening is melted or cut and bonded in a bag making, filling and packaging apparatus that fills the bag with items and fuses or cuts and bonds the bag opening.

Conventionally, when using the above-mentioned packaging device to package a large amount of items or to package relatively large individual items, the opening edge of the bag body is flattened in order to be melted or cut and glued. If the seal is closed, wrinkles will appear at the closed joint edge, and if the seal is adhered as is, the sealing performance will be poor and the seal will be unsuitable for long-term storage. For example, when packaging cut rice cakes, an oxygen absorber is included to prevent mold from forming. However, if the seal is poor due to wrinkles, the oxygen absorber loses its effectiveness in a very short period of time due to air leaking, and mold can grow. There was a problem that occurred.

The present invention was developed in view of the conventional circumstances, and its purpose is to securely remove wrinkles from the bag by grasping both ends of the opening of the bag and stretching out the wrinkles that occur when the bag is closed. At the same time, the purpose is to stabilize the quality of the bonded portion by accurately gripping the bag during fusing, cutting, and bonding.

The wrinkle removing device of the present invention is provided with a jig for clamping the opening of the bag body of the above-mentioned bag making, filling and packaging device so as to be able to open and close facing each other with the bag body in between. The present invention is characterized in that actuation fingers are provided to grip both ends of the opening portion clamped to the jig, and a mechanism for opening and closing the bag in the width direction of the bag is connected to the actuation fingers.

The protruding part of the above-mentioned clamping jig can be provided on both sides of the clamping jig, or only on either side, but when the opposing surfaces of the clamping jig are brought together, an appropriate gap should be left on both sides of the protruding part. This formation is effective in reducing wrinkles during degassing.

The first embodiment of the present invention will be described with reference to the drawings.
The figure is a vertical sectional front view of the wrinkle removing device of the present invention installed in a bag making, filling and packaging device, and FIG. 2 is a right sectional view thereof. In the figure, 1 is a cylindrical body for bag making, and a packaging film 6 is wrapped around the cylindrical body 1 for bag making, its both edges are glued and suspended from the cylindrical body, and the lower part is fused and bonded to form a bag body 8. be done. The bag body 8 is filled with the object to be packaged a, and degassing pipes 2, 2 facing the inside of the bag body 8 are provided through the bag-making cylinder 1, respectively. At the front and back of the opening of the bag 8 are clamping plates 3, 3.
are provided facing each other, and the clamping plates 3, 3 clamp the tips of the degassing pipes 2, 2 together with the opening of the bag body 8 so as to be openable and closable. At the bottom of the clamping plates 3, 3, sealing devices 4, 4 each having a built-in cutter 5 are provided facing each other with the opening of the bag body 8 between them. It is connected to a pressure cylinder, etc., and opens and closes the opening.

Clamping jig 7, 7 of the wrinkle removing device according to the embodiment of the present invention
is formed into a plate shape with protrusions 10, 10 in the center, and the protrusions 10, 10 are made to face each other in the front and back,
The sealing devices 4, 4 are provided under the sealing devices 4, 4, respectively, and are connected via support arms 9, 9 so as to interlock with the clamping plates 3, 3, respectively. The actuating fingers 6, 6, . At the same time, it is connected to a pneumatic cylinder or the like (not shown) so that the bag body 8 can be stretched in the width direction.

To explain the operation of the above embodiment, the packaging film b is wrapped around the bag-making cylinder 1, its both edges are glued and hangs down in a cylindrical shape, and its lower end is melted and glued to form the bag body 8. Ru. And cylindrical body 1 for bag making
As the article to be packaged a is filled through the bag, the clamping plates 3, 3 and clamping jigs 7, 7 interlock to clamp the opening of the bag 8, and the actuating fingers 6, 6 clamp the opening of the bag 8. Grasp both ends of the opening. Then, the inside of the bag body 8 is evacuated through the deaeration pipe 2.

The above degassing step may not be necessary depending on the type of packaged item, in which case the above degassing step can be omitted.
The opening is closed using a wrinkle removing device and a sealing device and then melted or cut and bonded. Further, the same applies when the present invention is used in a bag making, filling and packaging apparatus that does not have a deaeration device.

As shown in FIG. 7, when the center of the opening of the bag body 8 is clamped by both protrusions 10, 10 of the clamping jigs 7, 7, the overlapping films at the opening can be held in the correct positional relationship. At the same time, the thickness l at both ends of the opening is reduced to l', thereby allowing the operating fingers 6, 6 to grip both ends of the opening easily and accurately.

Upon completion of the degassing process, the operating fingers 6, 6, while gripping both ends of the opening of the bag 8, pull the bag 8 in the width direction by driving a connected pneumatic cylinder (not shown). Smooth out wrinkles. The above-mentioned grasped state does not only mean a state in which the opening of the bag body 8 is immovably grasped by the operating fingers 6, 6;
This includes a state in which the gripping portion is gripped so that the film slips due to tension in the width direction. Then, the gripping force is adjusted depending on the type of film, the shape and weight of the packaged item, and the gripping force is adjusted so that the gripping portion of the film can slip when a tensile force higher than the set value is applied to the film to eliminate wrinkles. It is effective in stabilizing the Next, as shown in FIG. 6, the sealing devices 4 seal the opening of the bag 8, and the cutter 5 cuts the bag 8 from the cylindrical body of the packaging film b. Then, the clamping plates 3, 3, the operating fingers 6, 6, . . . and the clamping jigs 7, 7 are opened in the front-rear direction and returned to their initial positions.

Since the present invention is configured as described above, the actuating fingers 6, 6 can remove the wrinkles that occur when the clamping jigs 7, 7 clamp the opening of the bag 8. It can be removed by grasping and pulling.

Further, the protruding parts 10, 10 of the clamping jigs 7, 7 clamp the center of the opening of the bag 8, and press the overlapping films at the opening in the correct positional relationship.
The thickness of both ends of the opening is suppressed so that the actuating fingers 6, 6 can accurately and easily grip both ends of the opening, thereby preventing the film from forming when clamping and pulling the opening in the width direction. Accurate sealing can be achieved without shifting or causing the opening to become diagonal due to being pulled to the left or right. As described above, the present invention not only provides wrinkle-free adhesion with excellent sealing properties, but also stabilizes the quality of the bag by accurately gripping it.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the wrinkle removing device of the present invention, FIG. 2 is a right sectional view thereof, FIG. 3 is a right sectional view showing the embodiment in a gripping state, and FIG. A top view of the figure, FIG. 5 is a top view showing the state of wrinkle removal,
FIG. 6 is a top view showing the sealing operation, and FIG. 7 is a top view showing a state in which the opening is held between the protruding parts of the jig. In the figure, 1 is a cylindrical body for bag making, 2 is a deaeration pipe, and 3
is a clamping plate, 5 is a cutter, 4 is a sealing device incorporating the cutter 5, 6 is a gripping jig, 7 is a clamping jig,
8 is a bag body, 10 is a protrusion, a is a packaged object, and b is a packaging film.

Claims (1)

[Scope of utility model registration request] A packaging film is wrapped around a cylindrical body for bag making, and both edges of the packaging film are adhered to form a cylindrical body, and the ends are melted or cut and bonded to form a bag body, and an item to be packaged is placed inside the bag body. In a bag making, filling and packaging device that performs packaging by filling and fusing or cutting and gluing the opening of the bag, a jig for clamping the opening of the bag is provided with a jig that can be opened and closed facing each other with the bag in between. ,
The jig has a protrusion in the center, and is provided with actuation fingers for gripping both ends of the opening clamped on the jig, and the actuation fingers have an opening/closing operation in the width direction of the bag body. A wrinkle removing device for a bag making, filling and packaging machine that connects a mechanism to remove wrinkles.