| JP2000218716 | BAG MAKING DEVICE |
| JP2003137313 | RESIN-MADE SHOPPING BAG |
| JP06305059 | FORM |
[CLAIMS]
[Claim l]
A method for collapsibly stacking continuously formed plastic bags, which are supplied in a state where each piece of the plastic bags has a bonded portion (101) formed on a side thereof, the method comprising the steps of: repeatedly pushing the continuously formed plastic bags at a position directly in front of a cutter part, which forms a cut portion on each plastic bag, in a fixed timing period using rollers; supporting a half of the length of the front part of the plastic bag pushed out by the rollers using a supporter; gradually lowering the supporter from an initially ascended height of the supporter, as much as a thickness of each collapsed plastic bag; sucking and fixing a central portion of the supplied plastic bag just near to the rollers of the supporter using a suction tube; pushing the plastic bag using the rollers in a state where the central portion of the plastic bag is fixed by the suction tube to thereby collapse the fixed portion; and fixing a central portion of the next plastic bag again using the suction tube while completely collapsing the collapsed plastic bag by pressing the plastic bag using a pressing plate, and continuously repeating the above steps. [Claim 2]
An apparatus for collapsibly stacking continuously formed plastic bags comprising: a conveyer part (10) having a plurality of belts (14), an upper roller (11) and a lower roller (12) for intermittently supplying the plastic bags (100) by a length of each piece of the plastic bags (100) in a fixed timing period by a servo motor (15); a cutter part (20) located at a position where the continuously formed plastic bag (100) is supplied by the conveyer part (10), the cutter part (20) having a supporter
(21) and a blade (22) ascending and descending above the supporter (21) for forming a cut portion (102) at a position just near to the bonded portion (101) of the plastic bag
(100) by cutting the plastic bag (100) while leaving only a portion of the plastic bag (100) ; and a stacking unit part (30) located just near to the cutter part (20) , the stacking unit part (30) including: a supporter (31) located at the lower portion thereof for supporting the collapsed plastic bags (100), the supporter (31) gradually lowering from an initially ascended height thereof by a well-known mechanically lifting means
(32) whenever the plastic bags (100) are stacked one by one; a pressing plate (34) located above the supporter (31) for pressing the collapsed plastic bags (100) while repeating ascending and descending motions by the lifting means in the same timing period as the blade (22); and a suction tube (35) mounted between the cutter part (20) and the stacking unit part (30) and having suction holes (36) .
[Claim 3] The apparatus for collapsibly stacking continuously formed plastic bags according to claim 2, further comprising a conveyer belt (40) mounted next to the stacking unit part (30) for conveying and discharging the completely collapsed plastic bags (100) of a predetermined quantity. |
[DESCRIPTION]
[invention Title]
Method and apparatus for collapsibly stacking continuously formed plastic bags [Technical Field]
The present invention relates to method and apparatus for collapsibly stacking continuously formed plastic bags to dispense continuously formed plastic bags from a packing box one by one like tissues dispensed one by one. [Background Art]
Recently, disposable plastic bags are universally used. A configuration for generally packing and using such disposable plastic bags is as follows. Many plastic bags are collapsed by each piece and inserted into a paper box or other container, and so, a user pulls out the plastic bags from the paper box or the container one by one whenever he or she wants to use them. Alternatively, plastic bags are continuously formed in a roll type, and so the user tears the plastic bags one by one to use while unrolling the continuously formed roll-type plastic bags.
Recently, an attempt has been made to use plastic bags in such a way as to pull out the plastic bags from a box one by one like tissues after continuously forming the plastic bags long and inserting the continuously formed plastic bags into the box (Korean Utility Model Registration No. 392,799). However, in order to insert the continuously formed plastic bags into the box in such a way that the container can dispense the continuously formed plastic bags one by one, a worker must orderly stack the continuously formed plastic bags while collapsing them. If the plastic bags are collapsed manually, since working efficiency is degraded,
such a conventional method has several problems in that productivity is deteriorated and manufacturing costs are increased, and in that a quality drop is caused, for instance, the plastic bags are not pulled out one by one in regular sequence since it is difficult to collapse the continuously formed plastic bags uniformly to the end. [Disclosure] [Technical Problem]
Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior arts, and it is an object of the present invention to provide an apparatus for collapsibly stacking continuously formed plastic bags, which can automatically collapse continuously formed plastic bags uniformly and quickly in an orderly fashion, thereby providing convenience in use of the plastic bags and reducing a price of packed plastic bags.
A method of collapsibly stacking the continuously formed plastic bags will be described.
While the continuously formed plastic bags are supplied from a side of the collapsibly stacking apparatus, rollers repeatedly push the continuously formed plastic bags at a position in front of a cutter part, which forms a cut portion on each piece of the continuously formed plastic bags to allow a user to easily separate each plastic bag and complete an entrance of each plastic bag, in a fixed timing period.
A supporter supports a half of the length of the front part of the plastic bag pushed out by the roller. The supporter, which has been first lifted, lowers as much as a thickness of the collapsed plastic bags, and a suction tube located just near to supply rollers of the supporter sucks and fixes a central portion of the supplied plastic bag.
The rollers push the plastic bag in a state where the central portion of the plastic bag is fixed by the suction tube to thereby collapse the fixed portion by the suction tube. In the above state, a pressing plate presses the collapsed plastic bag to completely collapse the plastic bag, and then, the central portion of the plastic bag is held again by the suction tube.
The continuously formed plastic bags are collapsed and stacked in orderly fashion by sequentially performing the above actions.
[Description of Drawings]
FIG. 1 is a perspective view showing a state where plastic bags are collapsibly stacked.
FIG. 2 is a configurative view of an apparatus for collapsibly stacking continuously formed plastic bags according to the present invention.
FIG. 3 is a view showing an operation state of essential parts of the apparatus for collapsibly stacking continuously formed plastic bags according to the present invention. FIG. 4 is an enlarged view of a suction tube part according to the present invention.
FIG. 5 is a detailed view of a conveyer part according to the present invention.
<Explanation ob essential reference numerals in drawings>
1: collapsibly stacking apparatus 10: conveyer part 11: upper roller 12: lower roller 13: auxiliary roller 14: belt 15: servo motor 20: cutter part 21: supporter 22: blade
30: stacking unit part 31: supporter
32: lifting means 34: pressing plate
35: suction tube 36: suction hole 40: conveyer belt 100: plastic bag 101: bonded portion 102: cut portion
[Mode for Invention]
Reference will be now made in detail to the preferred embodiment of the present invention with reference to the attached drawings .
A collapsibly stacking apparatus 1 according to the present invention includes a bonding unit part 2 receiving a plastic tube, which has a flat section and is wound in a roll type, from a side, the bonding unit part forming a bonded portion 101 on the plastic tube in such a way as to form and divide each plastic bag 100 and seal one side of each plastic bag 100 before the plastic tube enter the collapsibly stacking apparatus 1. The collapsibly stacking apparatus 1 according to the present invention includes a conveyer part 10 for repeatedly pushing each of the continuously formed plastic bags 100. The conveyer part 10 includes an upper roller 11 and a lower roller 12 for biting and conveying the plastic bag 100 therebetween, auxiliary rollers 13 located besides the upper roller 11 and the lower roller 12, and a plurality of belts 14 rotated in a state where each belt surrounds the upper roller 11 and the auxiliary roller 13 or the lower roller 12 and the auxiliary roller 13. As shown in the drawings, the rotation of the upper roller 11 and the lower roller 12 is set to repeat an intermittent supply work for supplying the plastic bags 100 by a length of one piece of the plastic bags 100 in a fixed
timing period using a well-known means such as a servo motor 15.
The collapsibly stacking apparatus 1 according to the present invention includes a cutter part 20 located at a position where the continuously formed plastic bags 100 are supplied by the conveyer part 10 for dividing and cutting the continuously formed plastic bags 100 into each piece in such a way that only a portion just near to the bonded portion 101 of the plastic bags 100 is cut. The cutter part 20 includes a supporter 21, and a blade 22 ascending and descending above the supporter 21, so that a cut portion 102 is formed on the plastic bag 100 by the blade 22 when the blade 22 is descended.
The collapsibly stacking apparatus 1 according to the present invention includes a stacking unit part 30 located just near to the cutter part 20. The stacking unit part 30 includes a supporter 31 located at the lower portion thereof for supporting the collapsed plastic bags 100, and a mechanically lifting means 32, which is well known, connected to the supporter 31, the supporter gradually lowering from an initial ascended height whenever the plastic bags 100 are collapsed and stacked one by one.
For the lifting means 32, generally mechanical elements and components may be used, for instance, a spiral shaft is formed below the supporter 31 and a spiral tube rotating by driving power of a motor is coupled to the spiral shaft, whereby the supporter 31 is ascended and descended.
In addition, a pressing plate 34 is provided to press the collapsed plastic bags 100 while repeating an ascending and descending motion by a well-known lifting means, such as a cylinder or a cam, in the same timing period as the blade 22 of the cutter part 20.
A suction tube 35 is located between the cutter part 20
and the stacking unit part 30, namely, just near to the initial height of the stacking unit part 30, and has a plurality of suction holes 36 formed on an area of the suction tube 35, where the plastic bag 100 is in contact, for fixing a collapsed portion of the plastic bag when a central portion of the plastic bag located above the suction tube 35 is collapsed and for sucking and holding the central portion of the plastic bag 100 located in front of the suction holes 36 when the pressing plate 34 presses the plastic bag 100. The collapsibly stacking apparatus 1 according to the present invention includes a conveyer belt 40 located next to the stacking unit part 30 for discharging the completely collapsed plastic bags 100 of a fixed quantity.
An operation of the collapsibly stacking apparatus 1, which can automatically and quickly collapsing a great deal of continuously formed plastic bags, will be described in detail as follows.
The continuously formed plastic bags 100 enter the collapsibly stacking apparatus 1 in a state where the bonded portion 101 is formed on each continuously formed plastic bag 100, and in this instance, is supplied to the collapsibly stacking apparatus 1 by a length of each piece of the plastic bags 100 through the conveyer part 10 and the cutter part 20 in the fixed timing period in a state where the bonded portion 101 and the cut portion 102 are formed thereon.
That is, the upper roller 11 and the lower roller 12 push the plastic bags 100 in a direction of the stacking unit part 30 while engaging with each other by the belts 14, and the portion to be cut just near to the bonded portion 101 of the plastic bags 100 is located on the cutter part 20 at the time of stopping the upper roller 11 and the lower roller 12.
At the same time with the supply of the plastic bags 100, the plastic bags 100 are collapsed by the actions of the
stacking unit part 30 and the suction tube 35. In this instance, since the central portion of one plastic bag 100 is located in front of the suction holes 36 of the suction tube 35, the plastic bag 100 is fixed by the suction tube 35, and in this state, when the conveyer part 10 pushes the plastic bag 100, while the central portion of the plastic bag 100 with the length of each piece, namely, the portion fixed by the suction tube 35, is collapsed, the cut portion 102 of the plastic bag 100 is advanced to the foremost position, and then, collapsed in the opposite direction to the central portion collapsed by the suction tube 25.
The plastic bag 100 can be smoothly collapsed since it is in the state where most of the cut portion 102 is cut and only a portion remains. In the above state, the pressing plate 34 lowers and presses the collapsed plastic bag 100, and so, the fixed portion fixed by the suction pipe 35 just before being pressed is pushed downwardly and lowers. The downwardly pushed portion is stacked on the supporter 31, and then, the central portion of the next plastic bag 100 is fixed by the suction tube 35.
At the same time with the drop of the pressing plate 34, the blade 22 drops to cut a portion of the plastic bag 100 to form the cut portion 102 on the next plastic bag 100. By continuously repeating the above actions, the plastic bags 100 are repeatedly collapsed in such a way that the central portion of each plastic bag 100 is collapsed on the supporter 31 and the cut portion 102is collapsed at the end of one side thereof in the opposite direction. While the plastic bags 100 are continuously collapsed, the supporter 31 of the stacking unit part 30 gradually lowers by the operation of the lifting means 32 to cope with a change of a height of continuously collapsed plastic bags 100. When the
plastic bags 100 as many as a predetermined quantity of the plastic bags 100 are completely collapsed, the operation of the stacking unit part 30, and then, the conveyer belt 40 is operated to convey and discharge the a bundle of the stacked plastic bags 100.
The bundle of the collapsed plastic bags is put into a box in such a way as to be dispensed one by one like tissues.
[industrial Applicability] As described above, according to the present invention, the continuously formed plastic bags, which are hard to handle and difficult to collapse in an aspect of a material property, can be quickly and exactly collapsed, thereby allowing users to easily pull out the continuously formed plastic bags, which are put in the box, like tissues, providing the plastic bags of a uniform quality with an inexpensive price, and providing convenience in home life.
Next Patent: CONVERTING IMAGE FORMAT