JPH04367407A - Method and machine for automatic packaging of article-to-be-packaged by film - Google Patents

Abstract

PURPOSE:To improve the handling property and workability, and make the device drastically smaller by a method wherein feeding of a plastic film to package a product is done by one film roll. CONSTITUTION:The pull out end of a film 4 which is pulled out to the bottom of an entrance for a work station 3 through the top of the entrance from one film roll 4a is chucked, and a square shaped article-to-be-packaged 1 is pushed in the work station 3 while the front surface is in contact with the film 4, and the film 4 is placed along three surfaces, the front surface and top and bottom surfaces, of the article-to-be-packaged 1. Then, the film 4 is placed along the back surface of the article-to-be-packaged 1 also by pressing down the extended part of the film 4 from the top of the back surface of the article- to-be-packaged 1, and after the pressed down part is sealed to the pull out end side, and cut, free ends of the film 4 which project from both sides of the article-to-be-packaged 1 are placed along both side surfaces of the article-to- be-packaged 1, and sealed.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention enables the supply of plastic film for packaging products using a single film roll, which provides excellent handling and workability, and also allows for significant downsizing of the device. The present invention relates to an automatic packaging method and an automatic packaging machine for packaged products using a film that can be used for packaging products.

0002

[Prior Art] For example, in a factory that produces styrofoam products for packaging electrical products, etc., a plurality of styrofoam products are lined up, the whole package is wrapped in a plastic film such as polyethylene, and the product is shipped. At this time, automatic packaging is performed in which the items to be packaged brought into the workstation are sequentially wrapped using film that is continuously supplied from a film roll.

However, in this type of conventional automatic packaging, the plastic film is continuously supplied from two film rolls placed one above the other, so it is necessary to perform the work of installing the film rolls twice. This method is time-consuming and requires work to attach the film roll at a dangerous location such as at a height or under the floor, resulting in poor workability. In addition, since the film is supplied from above and below, it is necessary to transport the packaged items horizontally, which increases the size of the equipment and requires more installation space.The width of the film used also increases, making it difficult to handle. In addition, there was a problem in that it also led to an increase in cost.

0004

[Problems to be Solved by the Invention] The present invention solves the above-mentioned conventional problems, and supplies a plastic film for packaging products using a single film roll. The mounting work can be done in one go in a safe place, which provides excellent workability.In addition, the product to be packaged can be carried in vertically, and the film roll used is small in width and inexpensive. It was completed with the aim of providing an automatic packaging method and automatic packaging machine for packaged products using film, which can be easily handled, and can also significantly downsize the device. It is something.

[0005]

[Means for Solving the Problems] The present invention, which has been made to solve the above problems, chucks the drawn end of a film drawn out from a single film roll through the upper part of the inlet of a workstation to the lower part of the inlet, and then Push the rectangular packaged item into the workstation while applying the front side to the film, apply the film to the front and top and bottom sides of the packaged item, and then insert the extension of the film from above the back of the packaged item. Press down and apply the film to the back of the packaged item, seal the pressed down part to the pull-out end side and cut it, then apply the free end of the film that extends from both sides of the packaged item to both sides of the packaged item. The first invention is an automatic packaging method for packaged items using a film that is characterized by sealing along the surface, and a single film roll that supplies film to square-shaped packaged items carried into a work station. a film gripping member that chucks the edge of the film supplied from the upper part of the entrance of the workstation below the entrance; and a film to be packaged in the workstation together with the film whose edge is chucked by the film gripping member. A pushing cylinder that presses the film to apply the film to the front and upper and lower surfaces of the packaged product; and a pushing cylinder that pushes down the extension of the film from above the back of the packaged product pushed into the workstation toward the film gripping member. and a seal bar that can be moved up and down to apply the film to the back of the packaged product with the film attached on three sides, and when the sealed film is cut between the lowered seal bar and the film gripping member. A movable clamper temporarily clamps the edge of the film by pressing the part slightly above the cut part toward the seal bar, and a clamper that temporarily clamps the edge of the film along the four sides of the packaged product. A second invention provides an automatic packaging machine for packaged products using a film, characterized in that it is equipped with a side sealing mechanism that seals along both sides of the packaged product.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained in detail based on the illustrated embodiments. The drawing shows an automatic packaging machine that covers and wraps a plurality of styrofoam products lined up to be packaged with a plastic film such as polyethylene film. Item 1
4 is a film for wrapping the packaged product 1, 5 is a finished product covered and packaged with the film 4, and 6 is a conveyor for carrying the finished product 5 to the next process. This is an unloading conveyor.

For example, the film 4 is fed from a single film roll 4a disposed on the side of the apparatus, the direction of which is switched by a guide bar 7, and is continuously supplied from the upper part toward the lower part of the entrance of the work station 3. Further, immediately in front of the work station 3, a tension bar 8a connected to a tension cylinder 8 is configured to apply an appropriate tensile force to the film so as not to wrinkle the film. Further, a film gripping member 9 for chucking the edge of the film 4 is provided at the lower part of the entrance of the workstation 3, and a film 4 is guided toward the film gripping member 9 at the upper part of the workstation 3. A seal bar 10 that can be raised and lowered is provided. The seal bar 10 is attached to the workstation 3
The device guides the film from above toward the film gripping member 9 so that the film is attached to the back surface of the packaged product 1, which is wrapped with film on both the upper and lower surfaces and the front surface, and cuts the film 4. A clamper 11 is provided which temporarily clamps the end at times. Further, the film gripping member 9 is provided with a heater 9a for heating and welding the film 4 when the seal bar 10 descends to sandwich the film 4 between them, and also for cutting the film 4. A cutter (not shown) is provided for cutting.

[0008] With this structure, the packaging work is performed continuously in the following order. Figure 2 shows the initial state before the packaged items are carried into the workstation, where one film roll 4a
The film 4 is fed from the top to the bottom at the front of the workstation 3, and
The lower end portion is held by a film gripping member 9. At this time, the tension cylinder 8 located at the front stage of the workstation 3 prevents the film 4 from wrinkling by applying an appropriate tensile force to the tension bar 8a, and the seal bar 10 opens the clamper 11. It is waiting on the top of workstation 3 in a state where it is in a state of waiting.

Next, as shown in FIG. 3, the packaged product 1 is carried into the workstation 3 by the operation of the product pushing cylinder 12 and the bottom plate pushing cylinder 13, and both upper and lower surfaces of the packaged product 1 are Then, the film 4 is wrapped around the three front surfaces. In this case, the film guide cylinder 14 and the tension cylinder 8 are operated at the upper end of the packaged product 1 to prevent the film from wrinkling. At this time, the film roll 4a, which is the supply source of the film 4, is locked by the lock cylinder 15.

Next, the product pushing cylinder 12,
Cylinder 13 for pushing the bottom plate, film guiding cylinder 14
When the film 4 is returned to its original position, the seal bar 10 descends from above the workstation 3, guiding the film 4, as shown in FIG. The film 4 will be coated. Next, as shown in FIG. 5, when the seal bar 10 descends until it comes into contact with the film gripping member 9, and all four sides of the top and bottom and front and rear surfaces of the packaged product 1 are covered with the film 4,
The joining portions of the film 4 are heat-welded by the heater 9a. At the same time, the clamper 11 of the seal bar 10 operates to clamp the end of the film 4, and in this state the film 4 is cut by the cutter. During this period, the tension cylinder 8 and the lock cylinder 15 are controlled to operate under certain conditions so as not to wrinkle the film 4.

Next, as shown in FIG. 6, the packaged product 1, which has a film 4 wrapped around both the top and bottom surfaces and the front and back surfaces, has free ends protruding from both sides, as shown in FIG. The left and right sides are sealed by another side sealing mechanism 16 for free end sealing to form a finished product, which is then transported to the carry-out conveyor 6. On the other hand, the seal bar 10 rises slightly while still clamping the end of the film 4, and at the same time, the film gripping member 9 opens. Thereafter, as shown in FIG. 7, the seal bar 10 is lowered again and the film ironing rod 10a provided at the bottom of the seal bar 10 is
When the end of the film 4 is brought into close contact with the film gripping member 9 by the operation, the film gripping member 9 is closed again to chuck the end of the film 4, as shown in FIG. Thereafter, the clamper 11 of the seal bar 10 opens and rises to the upper part of the workstation 3, resulting in the initial state shown in FIG. 2, and the next packaged item 1 is then carried in and the packaging process is performed in the same manner. becomes.

As described above, the present invention makes it possible to supply the film using only one film roll by providing the film gripping member and the seal bar, and the mounting of the film roll is This can be done, for example, on the side of the device, making it extremely easy and safe to attach the film roll. In addition, since the products to be packaged are wrapped using only one film roll, there is no height restriction on the product as in the conventional case of two film rolls, and the product can be transported into the workstation in a vertically long state. This made it possible to reduce the width of the film used, making it possible to downsize the device.

[0013]

Effects of the Invention As is clear from the above description, the present invention supplies a plastic film for packaging products using a single film roll, thereby allowing the work of installing the film roll to be carried out in a safe place. It can be carried out in one go, exhibiting excellent workability, and allows the goods to be packaged to be carried in a vertically long position.The film roll used is small in width, inexpensive, and has excellent handling properties. Furthermore, it is possible to significantly downsize the device. Therefore, the present invention greatly contributes to the development of industry as an automatic packaging method and automatic packaging machine for packaged products using film, which eliminates the problems of the conventional methods.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view showing an embodiment of an automatic packaging machine according to the present invention.

FIG. 2 is a schematic diagram showing the operating steps of the main parts of the embodiment.

FIG. 3 is a schematic diagram showing the operating steps of the main parts of the embodiment.

FIG. 4 is a schematic diagram showing the operation process of the main part of the embodiment.

FIG. 5 is a schematic diagram showing the operating steps of the main parts of the embodiment.

FIG. 6 is a schematic diagram showing the operating steps of the main parts of the embodiment.

FIG. 7 is a schematic diagram showing the operation process of the main part of the embodiment.

FIG. 8 is a schematic diagram showing the operation process of the main part of the embodiment.

[Explanation of symbols]

3 Workstation 4a Film roll 8 Tension cylinder 9 Film gripping member 10 Seal bar 11 Clamper 16 Side seal mechanism

Claims (3)

[Claims] Claim 1: Chuck the drawn-out end of a film pulled out from a single film roll through the upper part of the entrance of the workstation to the lower part of the entrance, and then push the rectangular packaged product into the workstation while applying the front side to this film. Apply the film to the front and top and bottom surfaces of the packaged product, then push down the extended part of the film from above the back of the packaged product, apply the film to the back of the packaged product, and then press down the extended part of the film from above the back of the packaged product. The product to be packaged using a film is characterized in that the drawn-out end side is sealed and then cut, and then the free ends of the film extending from both sides of the product to be packaged are sealed along both sides of the product to be packaged. Automatic packaging method. 2. A film roll (4a) that supplies film to the rectangular packaged product carried into the workstation (3), and a roll of film that is supplied from the upper part of the entrance of the workstation (3). Film gripping member (9) that chucks the edge below the entrance
and a pushing device for pushing the packaged product into the workstation (3) together with the film whose edges are chucked into the film gripping member (9) to apply the film to the front and top and bottom surfaces of the packaged product. Cylinder (12
), and the extended part of the film is pushed down from above the back side of the packaged product pushed into the workstation (3) toward the film gripping member (9) to remove the packaged product with the film attached to three sides. A seal bar (10) that can be moved up and down to attach the film to the back side, and when the film sealed between the lowered seal bar (10) and the film gripping member (9) is cut, the cut part is a little higher than the cut part. A movable clamper (11) that temporarily clamps the film edge by pressing the upper part toward the seal bar (10).
and a side sealing mechanism (16) for sealing the free ends extending from both sides of the film along the four sides of the packaged product along both sides of the packaged product. An automatic packaging machine for wrapped products using film. [Claim 3] The film roll (12) is placed in a position before the workstation (3).
3) The automatic packaging machine for wrapping products using a film according to claim 1, further comprising: a tension cylinder (8) for applying a tensile force to the film supplied to the machine.