JP3223328B2 - Continuous bag feeding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous film in which a sealed portion and a cutting perforation adjacent to the sealed portion are provided at equal intervals in a cylindrical film, and is fed one by one with a pair of feeding rollers. The present invention relates to a method of forcibly opening an opening of a first bag after cutting a preceding bag at a perforation in a continuous bag feeding method.

[0002]

2. Description of the Related Art In FIG. 2, (1) is a continuous roll-shaped continuous bag made of, for example, polyethylene, which is used for services in supermarkets and the like. The portion (2) and the cutting perforation (3) adjacent to the portion (2) are provided at equal intervals.

[0003] That is, a continuous bag (1) is formed by connecting a number of bags (4) at a perforation (3), and each bag (4) is formed of a continuous bag (1) loaded in a delivery machine (not shown). It is cut out by hand at the perforation (3) in order from the bag (4) at the tip and used.

[0004]

However, one bag (4) cut off has an upper piece (4a) and a lower piece (4b) perforated (3).
In the past, the bag (4) was thin and soft and both pieces (4a) (4)
There is a problem that the opening is unexpectedly troublesome because it is difficult to pinch b) separately.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to forcibly open the opening of the earliest bag by devising a continuous bag feeding method.

[0006]

In order to achieve the above-mentioned object, the present invention relates to a continuous bag in which a sealed portion and a perforation for cutting which are adjacent to the tubular portion are provided at equal intervals in the longitudinal direction. In a continuous bag feeding method in which continuous bags are fed one by one by sandwiching the pair of feed rollers and rotating both feed rollers, the rotation start timings of the both feed rollers are slightly different from each other. .

[0007] When the rotation start timings of both the feed rollers are made different, it is preferable to rotate the feed roller that started to rotate later at a slightly higher peripheral speed than the feed roller that started to rotate earlier.

[0008]

The rotation start times of a pair of delivery rollers which feed a continuous bag are slightly different from each other, or the peripheral speeds of both delivery rollers are slightly different from each other at the beginning of the rotation start of both delivery rollers. Due to the friction between the bag and the delivery roller, both side pieces of the opening portion of the first bag in close contact with each other are shifted from each other in the longitudinal direction of the continuous bag, and the opening is forcibly opened.

[0009]

An embodiment of the present invention will be described below with reference to FIG. Note that the same components as those of the related art shown in FIG. 2 are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, reference numerals (5) and (6) denote first and second delivery rollers whose peripheral surfaces in the delivery device for the continuous bag (1) are made of rubber. Both delivery rollers (5) and (6) are of equal diameter and equal in size and slightly shorter in length than the individual bags (4).
The motor (7) and the second motor (8) rotate in the direction of the arrow.

In a first embodiment of the present invention, a continuous bag
When feeding (1), the first feed roller (5) is started to rotate slightly before the second feed roller (6), and the rotation speeds of both feed rollers (5) and (6) are made constant.

Therefore, the upper piece (4a) of the bag (4) is connected to the lower piece (4b).
It is sent earlier, and the attachment portions of the perforations (3) on both side pieces (4a) (4b) are peeled off.

At this time, due to the front and rear misalignment of both side pieces (4a) and (4b), a wrinkle (not shown) occurs on the lower side piece (4b) immediately after both feed rollers (5) and (6), and the bag (4) ), But slips and disappears when the band-shaped sealing portion (2) passes between both the feeding rollers (5) and (6).

In the second embodiment, as in the first embodiment,
First, the first delivery roller (5) is started to rotate, and when the bag (4) is delivered about one fifth, the second delivery roller (6) is about 1.25 times the first delivery roller (5). Start rotation at the speed of.

Therefore, as in the first embodiment, the adhering portions of the perforations (3) are peeled off from the side pieces (4a) and (4b), and the wrinkles generated on the lower piece (4b) are removed from the lower piece (4b). ) Advances at a higher speed than the upper piece (4a), so that the band-shaped sealing portion (2) is moved out of the both feed rollers (5).
It disappears before passing through (6).

In the third embodiment, both feed rollers are used.
(5) Start rotating (6) at the same time, and increase the rotation speed of the first delivery roller (5) to about 1.25 times that of the second delivery roller (6) until the bag (4) is delivered about 1/5. After that, the speed is constant.

Therefore, at the start of feeding, the upper piece (4a) is fed ahead of the lower piece (4b), and the adhered portion of the perforation (3) is peeled off, and wrinkles formed on the lower piece (4b). Disappears when the band-shaped sealing portion (2) passes between the two delivery rollers (5) and (6).

[0018]

According to the present invention, since individual bags cut from a continuous bag have both sides attached at the perforation already separated and opened, it is possible to immediately put a product or the like into the bag. It is extremely convenient.

Further, the method of the present invention can be carried out simply by slightly controlling the driving means such as a motor for rotating both of the feed rollers, and is practically high.

[Brief description of the drawings]

FIG. 1 is a perspective view of a continuous bag and both delivery rollers showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an example of a conventional roll-shaped continuous bag.

[Explanation of symbols]

(1) Continuous bag (1a) Cylindrical film (2) Sealed part (3) Perforation (4) Bag (4a) Upper piece (4b) Lower piece (5) First delivery roller (6) Second delivery Roller (7) 1st motor (8) 2nd motor

Claims (3)

(57) [Claims] 1. A continuous bag in which a sealing portion and a cutting perforation adjacent to the tubular film are provided at equal intervals in a longitudinal direction on a cylindrical film, and a pair of delivery rollers sandwiches the continuous bag, and both delivery rollers are rotated. In the method for feeding continuous bags one by one, the rotation start timings of the two sending rollers are slightly different from each other. 2. The continuous bag feeding method according to claim 1, wherein the feeding roller that has started to rotate late is rotated at a slightly higher peripheral speed than the feeding roller that has started to rotate early. 3. A continuous bag in which a sealing portion and a cutting perforation adjacent to the tubular film are provided at equal intervals in a longitudinal direction on a cylindrical film, and a pair of delivery rollers sandwiches the continuous bag, and both delivery rollers are rotated. In the method of feeding continuous bags one by one, the peripheral speeds of the two feed rollers are slightly different from each other at an initial stage of the start of rotation of the both feed rollers.