JPH069888B2 - How to make a bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention mainly relates to a method for producing a paper bag with a handle such as a square bottom bag having a gusset.

(Prior Art) A step of horizontally cutting a pair of four notches symmetrically on both wings of a sheet of a predetermined width which is continuously fed in a stretched state, and a pair of reverse U Attaching the lower part of the letter-shaped handle so that the same parts are located under each of the above four cuts, and cutting the remaining part of the above four cuts To cut the paper into a length equivalent to one bag by cutting it with a blade that cuts four points so that it will not be cut, and a step of making the cut paper into a gusseted square bottom bag. A method for producing a bag which is carried out in the order listed is disclosed in JP-A-57-9544.
It is known from Japanese Patent Publication No. 4 and the like.

(Problems to be Solved by the Invention) However, in this method, the reverse U
After attaching a letter-shaped handle and cutting the paper into lengths equivalent to one bag, folding and gusset forming work etc. are carried out laterally for each piece of this cutting paper, so it is continuous. There is a problem in that it is inefficient as well as a complicated device is required as compared with the method of performing such work in series on the fed-out strip-shaped paper before cutting, and in the same method, it is in a stretched state. The number of cuts to be made in the sheet fed out in 2 is 4 in total, and these must be provided symmetrically on both sides of the sheet. Precise and troublesome work such as accurately aligning the four places with the bottom of each cut is required, and when cutting the above paper into a length equivalent to one bag, attach it to this. I cut off four points so that I could not cut the attached handle There is a problem, such as must be used cutting device Koto structure.

(Means for Solving Problems) The present invention relates to a step of attaching a pair of lower U-shaped handle lower sides to a predetermined portion of a sheet of a predetermined width which is continuously fed in an extended state, and a sheet of paper. In the process of making a short cut across the same part on the lower side of the paper moving path at a position corresponding to the left and right sides of only one of the handles in the same way, And a cutting device comprising a cutter roll arranged on the upper side of the moving path of the tubular part and a blade receiving part provided on the lower side of the cutter roll with side recesses of both front and rear handles. The step of obtaining a cut line which is integrated with the above short cut portion to cut a tubular portion into a body to obtain a structure for one bag, and a step of providing a bottom on the structure are performed in the listed order. We also try to solve these problems by providing a bag manufacturing method. Of.

(Embodiment) In the embodiment shown in the drawings, a sheet 1 having a predetermined width is continuously fed out from a feeding portion, and in this sheet 1, the front plate forming portion 2 and the rear plate forming portion 3 are preliminarily formed at a portion which becomes an opening edge when completed. A pair of front and rear U-shaped handles 5, 5 ′ each having a separately-configured mounting piece 4 are attached in a non-folded state, and a movement path of the extension portion 8 of the sheet 1 before it becomes a tube shape. A pair of actuating arms 9 which swing up their ends at a lower side in a constant cycle,
9'is provided so as to correspond to the left and right side portions 10, 10 'of the rear handle 5', and narrow knurling blades 11, 11 'are formed at the tips of the respective operating arms 9, 9'. Installation,
When the notched serrated blades 11 and 11 'are swung up by the operating arms 9 and 9', the sheet 1 is strongly struck at the portions corresponding to the base ends of the left and right side portions 10 and 10 'of the rear handle 5'. By the contact force and the tension force of the paper 1 by pulling, the notched serrated blades 11 and 11 'are provided with the notches 12 and 12' at the contact points, and further the left and right V-gusset formation parts are formed. 6, 6'and the glue allowance 7 are folded by a folding guide device, and the edges of the front plate forming portion 2 and the glue allowance 7 are stuck together by a glue applying device (not shown) to form the sheet 1 into a tube. In addition, a cutter roll 15 having a notched blade 14 for cutting the tubular portion 13 is provided above the moving path of the tubular portion 13, and a cutter roll 15 having a notched blade for cutting is also provided below the tubular roller 13. Cutter roll 15, receiving blade, etc. Lumpur 16 is implemented as a state tunes the cutting 12 to the blade receiving portion 17 of the receiving blades roll 16,
12 'are aligned so that the tubular portion 13 is placed, and the blade receiving portion 17 has a cutting function by means of a notching blade 14 for cutting at positions where the left and right sides 10, 10' of the front and rear handles 5, 5'are placed. The left and right side portions 10 and 10 'are provided with relief portions 18 and 18', and the tubular portion 13 is cut when the jagged blade 14 for cutting comes into contact with the blade receiving portion 17.
The structure 19 for one bag is cut off by cutting along the ring cutting line continuous with both ends of 2, 12 '.
9, a bottom forming portion (not shown) is continuously provided in front of the moving path of 9, and the bottom portion of the structural body 19 is formed by the bottom forming portion 20.
As a result, the finished product 21 is obtained.

In addition, the feeding section of the above-mentioned sheet 1, the sticking section of the handles 5, 5 ',
Since the folding guide device, the gluing device of the glue margin portion 7, and the corner bottom forming portion are common, their detailed description is omitted.

(Operations and Effects of the Invention) Since the present invention is as described above, it goes without saying that a handbag with a handle such as a square bottom with a gusset can be continuously and efficiently manufactured, but particularly in the present invention. Prior to the step of cutting the continuously extended sheet of paper into the length of one bag, that is, all the other bag-making steps except the bottom processing while the sheet is in the form of a series of strips. So 1 bag of paper
Unlike the above-mentioned known method in which the paper is cut into pieces of length and the bag-making work is performed for each cut sheet, an efficient hand bag with a handle can be manufactured without requiring a particularly complicated device. Also, only one notch is required to be made on the extended sheet of paper, and since this notch is opened by the serrated blade that rises periodically below the path of movement of the sheet of paper, this blade preliminarily cuts the sheet of paper. Even if it hits both the left and right sides of the attached sticker, there is no danger of cutting the sticker simply by flipping it up, and so there is no need for precision to avoid such a situation. In the present invention, there is no need for any special mechanism or work, and in the present invention, the relief of the cutter roll arranged on the upper side of the moving path of the tubular portion and the side portions on both sides of the front and rear lanterns arranged on the lower side thereof. With a cutting device consisting of a blade receiving part with an insert part In order to avoid cutting the handle as in the above-mentioned known ones, the blade of the cutter roll is cut to form a cut line that is integrated with the short cut portion and the tubular portion is cut into a cylinder. For this reason, there is an advantage that the general-purpose cutter roll can be used for this cutter roll without the need for a special one such as a cutting edge corresponding to The invention has the effect of being able to sufficiently solve the above problems.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing a manufacturing method of a bag of the present invention, FIG. 2 is a side view showing a notched notch blade portion in an apparatus for carrying out the invention, and FIG. 3 is a perspective view of the same. 4 and 5 are side views showing a portion of a notched blade for shredding, FIG. 5 is a perspective view showing the same, FIG. 6 is a perspective view showing a finished product, and FIG. 7 is an explanatory view showing a conventional manufacturing method. . 1 ... Paper, 2 ... Front plate formation, 3 ... Rear plate formation, 4 ...
Mounting pieces 5, 5 '... Brackets, 6, 6' ... Left and right V-gum formation,
7 ... Adhesive allowance, 8 ... Extension part, 9, 9 '... Actuating arm, 1
0, 10 '... both right and left sides, 11, 11' ... notched serrated blades, 12, 12 '... notches, 13 ... tubular portion,
14 ... Jagged blade for shredding, 15 ... Cutter roll, 16
... Receiving blade roll, 17 ... Blade receiving portion, 18, 18 '... Relief portion,
19 ... Construct, 20 ... Corner bottom, 21 ... Finished product.

Claims (1)

[Claims] 1. A step of attaching a pair of lower U-shaped handle lower sides to a predetermined position of a sheet of a predetermined width which is continuously drawn out in a stretched state, and left and right of only one of the sheets of the sheet. A step of cutting a short cut across the same part with a notch that rises periodically at the lower side of the paper moving path at a location corresponding to both sides, a step of making the paper into a tube shape, and a tube shape The cutting roll described above by means of a cutter roll arranged on the upper side of the moving path of the section and a cutting device consisting of a blade receiving section provided on both sides of the front and rear handles of the front and rear pens arranged below the cutting roll. A process for producing a bag, comprising: performing a step of obtaining an integral cut line to cut a tubular portion into a body to obtain a structure for one bag; and a step of providing a bottom on the structure in the listed order.