JP6173267B2 - Packaging bag - Google Patents

Description

  The present invention relates to a packaging bag.

  Conventionally, rectangular packaging bags having fasteners composed of male strips and female strips at the openings have been widely used (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 4-77935

  The conventional rectangular packaging bag has a right-angled corner, which may damage fingers and skin, and is insufficient in safety. In addition, there is a problem that it is caught on clothes, the inner fabric of the bag, etc., and safety and usability are poor.

  Accordingly, an object of the present invention is to provide an easy-to-use packaging bag that does not injure fingers and skin, is excellent in safety, and does not damage clothes and personal belongings.

In order to achieve the above object, a packaging bag of the present invention is provided on a male strip portion for fasteners provided on one bag wall portion of an opening portion of a bag body and on the other bag wall portion of the opening portion. and have a fastener comprising a female strip portion of the fastener, the separation protrusion for separating in the Ojo portion fitted state of the fastener and the female strip portion, the end of the fastener closed traveling side A packaging bag provided with a fastener opening / closing slider in the section, wherein the bag body is substantially rectangular in a front view, and all four corners in a front view are chamfered in an arc shape and In addition, a stopper portion for preventing the slider from sliding excessively toward the fastener-opening side is formed in a spot shape, and the spot-shaped stopper portion is the male strip portion of the fastener in the fitted state. And the female strip are welded to prevent separation of the fastener. The stopper portion is formed by a fastener welded portion, and a bag wall welded portion in which the one bag wall portion and the other bag wall portion are welded in close contact with each other inside the bag from the fastener welded portion. However, it is disposed on the fastener closing travel side by a predetermined small dimension from the upper inner edge of the one side edge on the fastener opening travel side, and the separating protrusion is excessively moved to the fastener opening travel side by the stopper portion. In addition, the slider is configured to prevent the slider from getting over the corner portion of the round shape chamfered in an arc shape .

  According to the present invention, there is no risk of injury to fingers and the like, and it can be used safely. There is no risk of getting caught in clothes or bags, and it can be easily removed, and the clothes and bags are not damaged, making it easy to use. The corners are rounded and the aesthetics are excellent.

It is a front view which shows one Embodiment of this invention. It is a principal part cross-sectional perspective view. It is a principal part side view of a bag. It is XX sectional drawing of FIG. It is a front view which shows an accommodation state. It is a side view which shows an accommodation state. FIG. 6 is a YY sectional view of FIG. 5. It is principal part sectional drawing. It is principal part sectional drawing for demonstrating an effect | action. It is principal part sectional drawing for demonstrating a comparative example. It is a front view which shows a reference example. It is a bottom view of a slider. It is AA sectional drawing of FIG. It is a half cut sectional view of the slider seen from the fastener opening travel side. It is a half-cut sectional view of the slider seen from the fastener closed travel side. It is sectional drawing of a constriction path. It is a principal part expanded sectional view for demonstrating the effect | action of a bulging part.

Hereinafter, the present invention will be described in detail based on illustrated embodiments.
As shown in FIGS. 1 and 2, the packaging bag according to the present invention includes a male strip portion Fa provided on the inner surface side of one bag wall portion 98 of the opening 9 a and an opening of the bag body 9. A female body portion Fb for fasteners provided on the inner surface side of the other bag wall portion 99 of the portion 9a, and a bag body 9 having a fastener F. The male strip portion Fa and the female strip in a fitted state are further provided. It has a separation projection 11 for separating the part Fb, and a fastener opening / closing slider 3 that is slidably attached to the bag body 9 in the fastener longitudinal direction N.

  The bag body 9 has a substantially rectangular shape in front view having an opening 9a provided with a fastener F, both side edges 9b and 9c closed by welding, and a bottom 9d closed by bending. Furthermore, all four corners 92, 92, 92, 92 are cut after welding to form a round shape R (may be rounded to a round shape R by fusing).

  When viewed from the front, both corners 92, 92 on the side of the opening 9a are formed in a rounded shape R that smoothly connects the opening edge 95 and the bag outer edges of the side edges 9b, 9c. That is, it does not have a protruding portion that protrudes outward (upward) from the opening edge 95 of the opening 9a.

As shown in FIGS. 3 and 4, the bottom portion 9d has an inverted V shape separated into two forks in a side view, and has a valley fold portion 82 between a pair of mountain fold portions 81 and 81 in a cross sectional view. It is the bottom collar part (gusset part) folded in the cross-section inverted V shape.
At the bottom portion (bag collar portion) 9d, the corner portion 92 (92a) of the bag body 9 formed in the mountain fold portion 81 on the one bag wall portion 98 side and the mountain fold portion 81 on the other bag wall portion 99 side are used. The corner portion 92 (92b) of the formed bag body 9 is a round shape R (same shape) in front view.

Further, both corners 92, 92 on the bottom 9d side connect the inner and outer edges of both side edges 9b, 9c and the ridge line of the folded back (mountain fold 81) of the bottom 9d in a smooth round shape when viewed from the front. The crescent-shaped welded portions 93 and 93 (see FIG. 1) are formed to enhance the rigidity and durability of the corner portion 92 on the bottom 9d side.
By the way, in the present invention, when the round shape R is defined, arcs having a radius of curvature of 3 mm to 10 mm at both corners 92 and 92 of the upper edge (left and right) provided with the opening 9a of the bag 9 are provided. On the other hand, the corners 92 and 92 of the bottom (lower end) 9d of the bag body 9 are arc shapes having a curvature radius of 8 mm to 30 mm.

  As shown in FIGS. 5 to 7, in the accommodated state in which the article Z is accommodated, the pair of mountain fold portions 81, 81 are expanded in an L shape in the bag width direction intermediate portion of the bottom portion (bottom collar portion) 9d. Opening, the valley fold 82 expands in a straight line, the bag thickness direction dimension E of the bottom 9d increases, and the bag internal volume increases. Further, the bag body 9 can be placed vertically on a flat surface such as a table or a floor surface.

  Next, as shown in FIGS. 1, 8, and 9, the bag body 9 is provided with a stopper portion 97 that prevents an excessive slide before the opening end portion 7 of the fastener F by a predetermined small dimension S. . In other words, the separation protrusion 11 of the slider 3 moves to the fastener closing travel side Nb, closer to the fastener closing travel side Na than the upper inner edge 91e of the upper end 91 of the side edge 9b on the fastener opening travel side Nb side. And a stopper portion 97 that prevents the slider 3 from sliding excessively toward the fastener opening travel side Nb.

The stopper portion 97 is formed by a welding portion in which one bag wall portion 98 and the fastener male strip portion Fa and the other bag wall portion 99 and fastener female strip portion Fb are closely integrated in a small oval spot shape. ing.
More specifically, a fastener welding site where the lower part of the fastener male strip Fa and the fastener female strip Fb (the bag interior 90 side) are welded, and a position below the fastener welding site (near the fastener F) Further, it is a bag wall portion welding portion where one bag wall portion 98 and the other bag wall portion 99 are welded on the bag interior 90 side with respect to the fastener F).
In addition, the upper position of the stopper portion 97 is not welded (when the stopper portion 97 is formed by welding, the upper portions of the fastener male strip portion Fa and the fastener female strip portion Fb are not welded. By setting the bag wall portions 98 and 99 on the outer side of the bag as non-welded), a small protrusion 26 described later can pass above the stopper portion 97.

  The stopper 97 prevents the fastener F from being separated by the separation protrusion 11 of the slider 3 (by holding the fastener fitting state by welding), or the separation protrusion 11 abuts against the stopper 97. Thus, the separation protrusion 11 of the slider 3 is prevented from moving to the fastener opening travel side Nb from the stopper 97.

  Further, in plan view, the separation protrusion 11 is formed by the stopper 97 before the opening traveling front end surface 3b of the slider 3 that travels open protrudes outward from the side edge 9b (outer edge of the bag). A stopper portion 97 is disposed so as to prevent the belt from moving to the fastener-open travel side Nb.

The predetermined small dimension S is substantially the same as the longitudinal dimension (slider total length) L of the slider 3, and more specifically, is 60% or more and 150% or less of the slider total length L.
Further, in a state where the fastener 3 travel movement of the slider 3 is blocked by the stopper portion 97 (see FIG. 9), the slider 3 is viewed in plan (viewed from above), the upper inner edge 91e of the bag body 9 and the slider 3 It is desirable from the standpoint of aesthetics to dispose the stopper portion 97 so that no gap is formed between the open traveling front end surface 3b.

If the stopper portion 97 is not provided as in the comparative example shown in FIG. 10, the open traveling front end surface 3b of the slider 3 gets over the upper end portion 91 of the one side edge portion 9b, and the one side edge portion 9b There is a possibility that an excessive slide (overrun) or detachment that protrudes outward from the outer edge) may occur.
Further, by providing the stopper portion 97, it is possible to freely (largely) set the length and radius of the arc shape R of the rounded shape R of the corner portion 92 without considering the possibility of the slider 3 being excessively slid or detached.

Next, the manufacturing method (process) of the bag body 9 includes a fastener member welding step in which the male strip portion Fa is provided on one side edge of the belt-shaped sheet material and the female strip portion Fb is provided on the other side edge, and the male strip portion Fa. And a bottom forming step of bending the strip-shaped sheet material so that the female strip Fb face each other (fitting), and the folded strip-shaped sheet material (after the bottom forming step) is fused with a predetermined interval dimension (bag width dimension). A side edge forming step for (welding / cutting), a rounding step for fusing (welding / cutting) a planned corner portion corresponding to the corner 92 of the bag body 9 to be formed into a round shape, and (bottom forming step) And a stopper part forming step of forming a stopper part 97 on the folded strip-shaped sheet material by welding. The side edge portion forming step, the rounding step and the stopper portion forming step may be performed simultaneously or separately. Moreover, it is good not only to cut | disconnect with a pressing blade after welding, but to cut (cut | disconnect while welding).
In the bottom forming step, the folded portion (the planned bottom portion of the bag body 9) is bent into a W-shaped cross section that forms a pair of mountain folded portions 81, 81 and a valley folded portion 82 therebetween. Fold in layers. When folding, a partition member is disposed in the valley fold 82 (between the mountain fold 81 and the mountain fold 81).
Further, in the side edge portion forming step and the rounding step, the mountain fold portion 81 and the mountain fold portion 81 are mutually connected by the partition member disposed in the valley fold portion 82 (between the mountain fold portion 81 and the mountain fold portion 81). The side edge portion and the corner portion of the bag body 9 can be melted (welded / cut) to form a bottom portion 9d that has an inverted V shape when viewed from the side.
Further, in the rounding process, an arc-shaped (crescent-shaped) welded portion 93 that connects the ridgelines of the side folds 81 of the side edge portions 9b, 9c and the bottom portion 9d into a rounded shape in a plan view on the bottom corner portion. , 93 to increase the rigidity and durability of the corner 92 of the bottom 9d.

  Note that, as in the reference example shown in FIG. 11, the stopper portion 97 can also be applied to a case where the corner portion 92 of the bag body 9 has a right angle (not a round shape R).

  Next, as shown in FIGS. 12 to 15, the slider 3 includes a first resin member 1 having a separation protrusion 11 on the fastener closing direction Na, a separated male strip Fa, and a female strip. A resin-made second member 2 having a narrow path 21 for fitting Fb on the fastener opening travel side Nb is fitted and integrated (assumed as an integrated assembly structure).

  In order to facilitate the description of the slider 3, the reference posture is a posture in which both the bag wall portions 98 and 99 of the bag body 9 are held in a vertical plane shape so that the opening 9a of the bag body 9 has an upper opening shape. In the reference posture, the vertical direction is referred to as the vertical direction T, the direction in which the male strip Fa and the female strip Fb are fitted and separated (the opening / closing direction of the opening 9a) is referred to as the horizontal direction W, and the fastener longitudinal direction. N is referred to as the front-rear direction N, the fastener closing travel side Na is referred to as the front side Na, and the fastener open travel side Nb is referred to as the rear side Nb. Therefore, the posture in use is not limited based on the direction.

  The first member 1 is connected to the first ceiling wall portion 19 disposed on the upper side (outer side of the bag) Ta of the opening 9 a and the ceiling wall portion 19 in a state of being attached to the bag body 9. A pair of left and right first side wall portions 18, 18 and a lower surface of the front portion of the ceiling wall portion 19 and a center position on the left and right sides projecting downward (to the bag interior 90 side) Tb and mating male strip Fa and female strip And a separation protrusion 11 for separating the portion Fb. The rear portions of the first side wall portions 18 and 18 have fitting claw portions 18a and 18a protruding inward in the left and right directions.

  The second member 2 has predetermined dimensions from the second ceiling wall portion 29 disposed on the upper side Ta of the opening 9a of the bag body 9 and the left and right side edges of the second ceiling wall portion 29 in the bag attachment state. A pair of left and right second side wall portions 28, 28 projecting downward from the second ceiling wall portion 29 at positions on the left and right inward sides, and a lower end of each of the second side wall portions 28, 28 are connected to each other. And a pair of left and right bottom wall portions 27 and 27 forming a slit 22 into which the nine opening portions 9a are inserted. Further, the second side wall portions 28, 28 of the second member 2 have step portions 28a, 28a for hooking that the fitting claws 18a, 18a of the first member 1 are fitted (engaged). .

Further, the second member 2 is formed by the lower surface of the second ceiling wall portion 29, the inner side surfaces of the second side wall portions 28, 28, and the upper surface 27a of the left and right inner edge portions of the bottom wall portions 27, 27. A narrowed path 21 is provided for fitting the male strip portion Fa and the female strip portion Fb which are separated (enclosed).
Moreover, it has the slit 22 of the front expansion shape which is formed in the right-and-left inner surface of both bottom wall parts 27 and 27, and a slit width expands toward the front.
Further, it is formed by the lower surfaces of the left and right side edge portions of the second ceiling wall portion 29, the left and right outer surfaces of the second side wall portions 28 and 28, and the upper surfaces 27b of the left and right outer edge portions of the bottom wall portions 27 and 27. A pair of left and right recess grooves 23 (along the front-rear direction N) that open to the left and right are provided.

When the first member 1 and the second member 2 approach each other in the front-rear direction N, the rear protruding piece portions of the first side walls 18 and 18 of the first member 1 are for fitting the second member 2. Are inserted into the concave grooves 23, 23, and the fitting claw portion 18a is fitted (engaged) and integrated with the step portion 28a to form a block-shaped slider 3 having a rectangular shape (rectangular shape) in plan view and side view. To do.
Such a structure allows the first member 1 and the second member 2 to be fastened to the fastener F even after both ends of the fastener F are welded and closed (upper end portions 91 of both side edges 9b and 9c). After attaching so that it may straddle, it can attach easily by approaching the front-back direction N mutually.

  The slider 3 includes an upper wall portion in which the first ceiling wall portion 19 and the second ceiling wall portion 29 are formed in close contact (connected) in a single plate shape (flat surface), and the first both side wall portions 18. , 18 and the second side wall portions 28, 28 are formed by fitting both side wall portions, a lower wall portion formed by both bottom wall portions 27, 27 of the second member 2, and a lower wall portion thereof. And a slit 22 through which one bag wall portion 98 and the other bag wall portion 99 are inserted. And the separation projection 11 in the front interior, the male strip insertion passage and the female strip insertion passage partitioned by the separation projection 11, the confluence formed in the front and rear intermediate interior, and the narrowing in the rear interior And a fastener passage having a Y-shape in plan view.

Further, the separation protrusion 11 of the first member 1 has a column portion 11a that protrudes from the lower surface of the first ceiling wall portion 19 to the lower side Tb and is interrupted between the male strip portion Fa and the female strip portion Fb. The lower portion of the column portion 11a has a bulging portion 11c that forms locking surfaces 11d and 11d on both the left and right sides.
The locking surfaces 11d and 11d are disposed on the lower side Tb (the bag interior 90 side) of the male strip Fa and the female strip Fb in the bag-attached state (see FIGS. 8 and 17). Further, it is disposed at the front portion in the slit 22.

Further, as shown in FIG. 14, when viewed from the fastener closing travel side Na, the left and right lower corners of the bulging portion 11 c are formed in rounded shapes, and the separation protrusion 11 is formed from the upper side Ta to the bag body 9. It is easy to insert into the opening 9a.
In addition, the planar view shape, the cross-sectional shape, and the planar view positional relationship of the column part 11a and the bulging part 11c are free. In other words, any shape may be used as long as a pair of left and right engaging surfaces (saddle-shaped portions) 11d and 11d are formed on the left and right sides at a position below the fastener F.

As shown in FIG. 15, the second member 2 is formed by forming a small protrusion 26 protruding downward Tb on the ceiling surface 21a of the constricted path 21 (the surface forming the constricted path 21 on the lower surface of the ceiling wall portion 29). Yes.
As shown in FIG. 16, the small protrusion 26 is between the opening edge 95 of the one bag wall portion 98 and the opening edge 95 of the other bag wall portion 99 (in the left and right inner sides of the bag) in the bag attachment state. Arranged.
The lower end surface 26a of the small protrusion 26 is lower than the opening end edge (opening upper end edge) 95, 95 of the opening 9a and the upper end of the fastener F (upper end of the female strip Fb) Fd in the bag attachment state. Are also provided on the upper side Ta. The upper end of the fastener F is the upper surface of the upper wall part which forms the ditch | groove of the female strip part Fb in the example of a figure.

  Also, as shown in FIG. 12, the side surface of the constriction path 21 is formed so as to incline to the left and right as it goes to the front side Na in plan view. In other words, the narrow path 21 is formed in a front enlarged shape in plan view so that the male strip portion Fa and the female strip portion Fb approach smoothly.

When the slider 3 is slid to the fastener opening travel side Nb, as shown in FIG. 9, the movement of the separation projection 11 is blocked by the stopper 97 near the one side edge 9b, and the stopper 97 The small protrusions 26 that have passed through the upper position come into contact with the upper end portion 91 (the upper inner edge 91e near the fastener and in the vicinity of the fastener) of the one side edge portion 9b to be prevented from moving.
The opening travel leading portion of the slider 3 greatly rides on the upper end portion 91 of the one side edge portion 9b of the bag body 9, or the opening travel leading end surface 3b of the slider 3 extends from the one side edge portion 9b to the outside of the bag. Prevents excessive slides (overruns) that protrude and overriding.

  When an excessive pulling force that lifts the slider 3 upward is applied when opening and closing the fastener F or gripping the bag body 9, as shown by a two-dot chain line in FIG. The left and right locking surfaces 11d and 11d are respectively hooked so as to prevent the male strip portion Fa and the female strip portion Fb from falling downward. That is, the slider 3 is prevented from being detached from the opening 9a (fastener F) of the bag body 9 to the upper side Ta.

In the present invention, the design can be changed, and although not shown, the first member 1 and the second member 2 may be fitted in the vertical direction T. The 1st member 1 and the 2nd member 2 are good also as a structure integrated by the fitting of a convex part and a crevice, or a projection part and a hole . The bulging out portion 11c and the small projections 26 may be omitted. The bottom portion 9d of the bag body 9 may be free of wrinkles bent into a V shape.

In addition, the bag body 9 to which the packaging bag according to the present invention is applied is formed by bending a sheet-like material and welding or fusing both side edges 9b and 9c, or two sheet-like materials. Alternatively, a part of the peripheral part may be welded or bonded and overlapped in a face-to-face manner, and the remaining part may be an opening. On the inner surface of the upper end portion of one bag wall 98, a male fastener member made of resin having a male strip portion Fa for fastening and a fixing strip plate portion is fixed integrally by welding, bonding or the like, and the other bag wall is fixed. Any resin fastener female member having a female strip Fb for fastener and a fixing band plate on the inner surface of the upper end portion of the portion 99 may be fixed integrally by welding or bonding.
In addition, the sheet-like material has a resin film layer on which the inner surface (layer) of the bag can weld the male and female members made of resin, and the material of the outer surface (layer) of the bag is Be free. For example, as the sheet material, in addition to the resin film material, a paper film laminated on the outer side surface of the resin film material or a metal foil laminated and integrated may be used.
Welding is a process of joining resins together without applying an adhesive by applying heat and pressing force, such as ultrasonic welding and heating welding, and includes thermocompression bonding, thermal welding, and thermal fusion. In other words.

  As described above, the packaging bag of the present invention is provided on the male strip Fa for the fastener provided on one bag wall 98 of the opening 9a of the bag body 9 and the other bag wall 99 of the opening 9a. In the packaging bag having the fastener F composed of the provided female strip Fb, the bag body 9 is substantially rectangular in a front view, and has four corners 92, 92, 92, Since all the 92 have the rounded shape R, there is no risk of injury of fingers or the like at the corners 92 of the bag body 9, and it can be used safely. There is no risk of getting caught in clothes or bags, and it can be easily removed, and the clothes and bags are not damaged, making it easy to use. The round shape is rounded at the corner 92 and the aesthetic appearance is excellent.

  In addition, a fastener opening / closing slider 3 having a separating projection 11 for separating the male strip Fa and the female strip Fb in a fitted state is provided, and a predetermined small dimension S before the open end portion 7 of the fastener F. Since the stopper portion 97 for preventing an excessive slide is attached to the arc shape, the arc length of the round shape R can be increased, and the beauty and safety can be improved. There is no possibility that the slider 3 slides excessively, and the usability is improved.

  In addition, the stopper portion 97 is formed by a welding portion in which one bag wall portion 98 and the fastener male strip portion Fa and the other bag wall portion 99 and fastener female strip portion Fb are closely integrated in a spot shape. The stopper portion 97 can be formed easily and quickly. For example, in the formation process of the bag body 9, it can carry out simultaneously with the welding process of the side edge parts 9b and 9c, and the bag body 9 can be manufactured rapidly and efficiency can also be improved.

3 Slider 7 Open end 9 Bag 9a Opening
9b one side edge
11 Separation protrusion
90 bags inside
91e upper inner edge
92 Corner
97 Stopper
98 One bag wall
99 Other bag wall F Fastener Fa Male strip Fb Female strip R Round shape S Predetermined small dimension
Na fastener closed travel side
Nb fastener open side

Claims (1)

A fastener male strip (Fa) provided on one bag wall (98) of the opening (9a) of the bag (9) and the other bag wall (99) of the opening (9a). female strip portion for provided fasteners have a fastener (F) consisting of the (Fb), in the Ojo portion in the fitting state of the fastener (F) (Fa) and the female strip portion (Fb) the separation protrusion for separating (11), a packaging bag having a slider (3) of the fastener opening with the ends of the fastener closed traveling side (Na),
The bag body (9) has a substantially rectangular shape when viewed from the front, and all four corners (92), (92), (92), and (92) when viewed from the front are rounded and rounded (R). As
A stopper portion (97) for preventing the slider (3) from sliding excessively toward the fastener opening travel side (Nb) is formed in a spot shape, and the spot-like stopper portion (97) is in the above-mentioned fitted state. A fastener welded portion in which the male strip portion (Fa) and the female strip portion (Fb) of the fastener (F) are welded to prevent separation of the fastener (F), and the fastener welded portion inside the bag ( 90) on the side, the one bag wall portion (98) and the other bag wall portion (99) are formed by a bag wall portion welded portion welded in close contact,
The stopper portion (97) is disposed on the fastener closing travel side (Na) by a predetermined small dimension (S) from the upper inner edge (91e) of one side edge (9b) of the fastener opening travel side (Nb). The stopper portion (97) prevents the separation protrusion (11) from excessively moving to the fastener-open travel side (Nb), and the slider (3) is rounded in a circular arc shape. A packaging bag characterized by being configured to prevent overcoming the corner (92) of (R) .

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