JP2531054Y2 - Packaging bag with a closed string - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag with a closing cord.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 8 , a flat bag body (51) made of a thermoplastic synthetic resin film has its upper edge turned up and its front end is opposed to a pair of front and rear sides of the bag body (51). The wall (52) is thermally fused to the bag body (51) in the width direction of the bag body (51), and a pair of front and rear closing cord mounting tubular portions (53) and (53) are provided along the opening edge. A packaging bag with a closing string is known in which a closing string (54) (54) capable of closing the opening edge in a bundled state is inserted into the mounting tubular portion (53) (53) (Japanese Patent Publication No. 1-32170). And Japanese Utility Model Publication No. 50-8087). Such a conventional packaging bag with a closing string includes a pair of closing strings (54).
By draw bow to limit (54) in opposite directions, Fig. 8
It is possible to close the opening edge of the bag in a focused state as shown in FIG.

[0003] However, in order to hang the bag for packaging or to tie the closing straps (54) and (54) together, the force for pulling the closing straps (54) and (54) is reduced, and the closing strap (54 ) is reduced. ) (54) is lifted upward, and the closing string (5)
4) The focusing force due to (54) is weakened, and the elastic repulsive force of the synthetic resin film may loosen the closing of the opening edge and slightly open the bag mouth.

[0004] This invention has been made in view of the above-mentioned problems, and once the closing cords 54) and 54) are squeezed to close the opening edges of the bag into a bundled state, the closing cords are closed.
(54) Even if the force for pulling down (54) is weakened, the desired closed and closed state of the opening edge is maintained, and the packaged product can be packaged in a sanitary manner, and is also suitable for machine production. It is intended to provide a bag for use.

[0005]

According to the present invention, in order to achieve the above object, a number of concave portions are provided on the upper end of the bag body, that is, on the outer surface of the closing string attaching portion, and the opening edge is focused. Under the condition, the concave portions frictionally and interfere with each other to suppress the elastic repulsion of the film, thereby maintaining the focused state of the opening edge.

That is, the packaging bag with a closing string according to the present invention is a flat tubular closing string mounting portion along the upper opening edge of a flat cylindrical bag body made of a thermoplastic synthetic resin film or sheet such as polyethylene. Is provided, wherein a closing string capable of closing the opening edge in a converged state by inserting one end portion into the closing string attaching section as an operation section is inserted. The present invention adopts a configuration in which a large number of concave portions are provided on the outer surface of the contact surface in the above-mentioned converging state so as to provide a frictional resistance to the contact surface.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings.

[0008] (1) is a flat cylindrical bag body having an open upper end, made of a thermoplastic synthetic resin film or sheet such as polyethylene, and a pair of opposing walls (2) and (2) at both left and right ends. They are thermally fused together. (4) is the fused portion.

(5) (5) are a pair of front and rear closing string mounting portions provided on the inner surface of the upper end of the front and rear walls (2) and (2) of the bag body (1), and the front and rear walls (2) and (2). The folded pieces (7) and (7) extended from the upper edge of the inner wall of the front and rear walls (2) and (2) to be described later are arranged in upper, middle, and lower three stages at the upper ends of the front and rear walls (2) and (2) The bottoms of the concave strips (9) (9) are cut into each other, and the folded pieces (7) (7) are joined to the corresponding front and rear walls (2) (2) to form a flat tubular shape. ing. Accordingly, each of the mounting portions (5) (5) is substantially divided into two upper and lower chambers by the middle concave ridges (9) (9). When the packaging bag is not used, the mounting portions (5) and (5) are heat-sealed at both left and right ends, and are substantially sealed. The concave ridges (9) (9) are formed parallel to each other at a predetermined interval and have an extremely fine width orthogonal to the length direction of the mounting portions (5) (5). It is engraved and heats the knurling process
By doing so, the folded piece (7) as shown in FIG.
(7) and the bottoms of the concave strips (9) and (9) are heat-sealed.
You.

[0010] (10) and (11) are inserted into the pair of front and rear closing strap attaching parts (5) and (5), and the ends of the opening are drawn by pulling in opposite directions by using one end part on the opposite side as an operating part. A pair of closing cords that can be closed in a bundled state, each of the closing cords (10) and (11) being a pair of front and rear tape-shaped closing cord constituent members (10a) (10a) (11) made of a thermoplastic synthetic resin.
a) (11a). The pair of closing cord constituent members (10a) (10a) (11a) (11)
a) is unitarily fused and integrated with the mounting portions (5) and (5) at both left and right end portions thereof. (12) is the fused portion. Further, at the opposite ends, breakable connecting portions (13) and (13) are provided around the fused portions (12) and (12), which can be broken by pulling. By breaking, the fused portion (12)
Can be used as an operation unit to draw down the closing strings (10) and (11).

The production of the packaging bag with a closed string according to the above embodiment is performed, for example, as follows.

First, a thermoplastic synthetic resin film (F) having a predetermined width is folded in two in the width direction, and the edge on the free end side is folded inward.
(1) A laterally U-shaped breaking connection portion (1
3) (13) is provided. This breaking connection part (13)
(13) ... is S-shaped which is continuous over the left lower end portion of the bag body (1) adjacent to the upper right end portion of the bag body (1) as shown by the chain line in FIG. 7 (a) It can be provided rationally by adopting the state of the shape. Next, a tape-shaped closing cord member (10) is provided between the inner folded pieces (7) and (7) and the corresponding front and rear walls (2) and (2) of the bag body (1).
a) the (11a) (10a) (11a) at predetermined intervals into the parallel form, the end of the closed string components in the bag body (1) (10a) (11a), in FIG. 7 (b) As shown in the figure, the folded pieces (7) and (7) and the front and rear walls (2) and (2) are provided in a region extending from the region surrounded by the breaking connection portion (13) to the side end of the adjacent bag body (1). And heat fusion together. Thereafter, the front wall (2) and a rear wall (2) upper outer surface or closed strap mounting portion (5) outer surface B of (5) - Let processed subjected to Figure 7 a large number of, as shown in (c) Closing the concave streaks (9) (9) .... String member (10a)
It is provided above and below (11a), that is, in a three-stage arrangement. Finally, the front and rear walls (2) and (2) are thermally fused and blown along the imaginary line shown in FIG. 7 , thereby completing the production of the closed-string-wrapped bag (A) of this embodiment.

In use, the bag for closure with the closing cord of the above embodiment is gripped by using the fusion parts (12) and (12) at one end of the closing cord (10) and (11) as an operation part and broken. Closing cord (10) while breaking the connecting parts (13) and (13)
(11) are drawn in opposite directions to close the opening edge of the bag body (1) in a focused state.

[0014] In this converging state, the closing strap is attached.
The parts (5) and (5) are pleated and overlap. This
Under the condition of, the foldable contact surface as shown in FIG.
In addition, the concave portions (9) (9).
As a result, a large frictional resistance is applied to the contact surface. Also many
The number of concave parts (9), (9)...
(5) Since the so-called waist is lost in (5), the original
A state in which the elastic restoring force that tries to return to the state has been greatly suppressed
It has become. Moreover, in the closing strap mounting part (5) (5)
Closed straps (10) and (11) inserted and each closed strap mounting part
(5) A frictional force is also generated between the inner surface and (5). However
Thus, the closed state of the opening edge of the bag mouth is reliably maintained.

In this embodiment, a pair of upper and lower closing cords are used, but the number of closing cords may be one, or a thermoplastic synthetic resin in which the constituent members of the closing string can be thermally fused to each other. If it is made of tape, it is not limited to a tape shape.
In addition, concave portions (9) (9)
When forming ... knurling is performed while heating
But just knurl it without heating
It's fine.

[0016]

[Effect of the invention] The packaging bag with the closing string according to the invention is:
With the above configuration, the contact surfaces of the mounting portions friction and interfere with each other under the converging state of the opening edge to suppress the elastic repulsion of the synthetic resin film or sheet, and the closing cord is provided. Can be held in a focused and closed state of the opening edge realized by pulling down, and it becomes possible to store the articles to be packaged in a sanitary manner.

Also, since a large number of concave portions can be easily provided at the time of bag making, the packaging bag with a closed string according to the present invention is suitable for machine production and manufactured at the same cost as a conventional packaging bag with a closed string. It has the advantage that it can be done.

[Brief description of the drawings]

FIG. 1 is a perspective view of a packaging bag with a closing string according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG . 1 ;

FIG. 4 is an enlarged sectional view of a part A in FIG . 3 ;

FIG. 5 shows a bundled state of the packaging bag with the closing string according to the present invention .
It is a perspective view in.

FIG. 6 is a sectional view taken along line IV-IV of FIG . 5 ;

FIG. 7 is a plan view showing a part of the manufacturing process .

FIG. 8 is a partially enlarged perspective view of a conventional packaging bag with a closed string.
is there.

FIG. 9 is a perspective view showing a state in which the opening edge is focused and closed;
You.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Bag main body 2 ... Opposite wall 5 ... Closing string mounting part 9 ... Concave stripe part 10, 11 ... Closing string 13 ... Breaking connection part

Claims (1)

(57) [Scope of request for utility model registration] 1. A flat tubular closing strap mounting section is provided along an upper end opening edge of a flat tubular bag body made of a thermoplastic synthetic resin film or sheet such as polyethylene, and one end is provided in the closing strap mounting section. In a packaging bag with a closing string in which a closing string capable of closing the opening edge in a focused state by pulling down the part as an operating part is inserted, the outer surface of the closing string attaching part is contacted in the focused state. A packaging bag with a closing string, wherein a plurality of concave portions capable of imparting frictional resistance are provided on a surface.