JP2606389Y2 - Synthetic resin bag with zipper - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin bag with a chuck.

[0002]

2. Description of the Related Art A synthetic resin bag made of a multilayer film including a uniaxially stretched film is disclosed in Japanese Utility Model Application Laid-Open No. 59-8987.
As in No. 8, a tear portion is provided on one surface in the stretching direction of the film,
What is to be opened has been proposed. A bag with a chuck having a chuck near the opening is also widely used by general consumers.

[0003]

[PROBLEMS TO BE SOLVED] To provide a zipper-equipped synthetic resin bag which has both smooth opening and ease of use.

[0004]

The gist of the first invention for achieving the above object is to provide a bag having a tear portion which is configured to tear open one side of the bag by two slit lines for opening. Side seals S are provided on both sides, and an upper end is closed by an upper closing portion U. The upper end has a chuck 3 which connects the two side seals S at a distance from the upper closing portion U. A tear portion 5 is provided between the tear portion 5 and the chuck 3, which is parallel to the chuck 3 and is adjacent to the upper closing portion U at an interval α, while the bag film between the tear portion 5 and the chuck 3 is relatively spaced. 3, characterized in that it is reinforced by a series of or separate embossed projections 4 from the base film 3 at a distance β from the tearing portion 5.

Another feature of the first invention is that the opening strip 5a at the tear portion 5 is reinforced by a strip projection 7.

[0006] In the second invention, an upper blocking portion U and a tearing portion 5 are provided.
And an opening-side embossed projection 8 is added at a distance γ from the tearing portion 5.

[0007]

[Operation of the First Invention] (a) When the tearing portion 5 is torn by the opening strip 5a (two slit lines for opening),
The end portion of the upper closing portion U which is close to the tear portion 5 and the lower embossed convex portion 4 resist the tearing force of the opening strip 5a, so that the tearing is performed smoothly. This is because the tearing force of the unsealing strip 5a is prevented from spreading upward and downward by the embossed convex portion 4 at the upper closing portion U to the upper side and concentrated to the main portion at the lower side.

(B) The distance α between the tearing portion 5 and the upper closing portion U
When the distance β between the torn portion 5 and the embossed convex portion 4 is close to each other, the tearing force can be evenly applied to the upper and lower portions of the torn portion of the torn portion 5, so that the torn can be performed more smoothly.

(C) When the unsealing strip 5a is reinforced by the strip projections 7, the tearing force is more likely to act upon unsealing, so that the tearing is further smoothed.

(D) Since the upper blocking portion U and the tearing portion 5 are close to each other, the bag film between the upper closing portion U and the tearing portion 5 is less likely to be lifted after opening, while the tearing portion 5 and the chuck 3 are not opened. Since the bag film in between is reinforced by the embossed projections 4, the bag film has a strong tendency to return to its original flat state by opening, and therefore, the bag film between the tear portion 5 and the chuck 3 from the bag surface. The body film is in a floating shape, making it easier to grasp.

[0011]

In the second invention, when there is a certain distance between the upper blocking portion U and the tearing portion 5, the distance γ between the upper blocking portion U and the tearing portion 5 and the tearing portion 5 are set. In addition, since the opening side embossing projection 8 is added, the opening side embossing projection 8 plays the same role as the embossing projection 4 in the operation of the first invention, so that opening is facilitated.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below.
1 to 3, reference numeral 1 denotes a synthetic resin bag body with a chuck according to the present invention, 2 denotes a hanging hole, 3 denotes a chuck, 4 denotes an embossed protrusion provided between the side seals S, S above the chuck 3,
Reference numeral 5 denotes a tear portion provided above the embossed convex portion 4, and the opening strip 5a is cut from the bag.

Although the base film of the chuck 3 and the embossed projections 4 are separately provided in FIG.
The embossed protrusions 4 may be provided as a series with the base film of the chuck 3, that is, in such a manner that the opening side of the base film is wide (not shown).

Reference numeral 6 denotes a defective portion of the side seal S for forming an end of the opening strip 5a, and U denotes an upper closing portion. Further, although the bag film in the examples is preferably formed of a multilayer film including a uniaxially stretched film,
The present invention can be applied to a multilayer film or a single-layer film that does not include a uniaxially stretched film. However, in such a case, a treatment such as making the above-mentioned film easy to tear or giving a direction to the tear is required.

The bag of the first invention has the following configuration. ▲ a
The tearing portion 5 provided between the upper closing portion U and the chuck 3 is provided in parallel with the chuck 3 and close to the upper closing portion U (interval α).

(B) On the other hand, the bag film between the tear portion 5 and the chuck 3 which are relatively spaced apart from each other is reinforced by a series of or separate embossed protrusions 4 from the base film of the chuck 3. That you are.

(C) The embossed convex portion 4 is close to the tear portion 5 (interval β), and the interval α and the interval β are desirably similar.

Next, a modification of the first invention shown in FIGS. 4 and 5 will be described. 4 to 5 are different from the first embodiment in that a strip protrusion 7 is provided on the inner surface of the tearing strip 5 of the tearing portion 5 to reinforce the tearing strip 5a.
The strip projection 7 serves to assist in tearing and unsealing by the unsealing strip 5a.

The strip projections 7 prevent the tear-off force from acting due to the opening or tearing of the opening strip 5a, and its thickness and material are taken into consideration to meet the purpose.

Next, the second device shown in FIG. 6 will be described. In the first embodiment, the main focus is on bringing the upper obstruction portion U and the tear portion 5 close to each other.
For the same purpose as the existence of the embossed projection 4 between the chuck 3 and the chuck 3, the above-mentioned object can be achieved by providing the opening-side embossed projection 8 also between the upper closing portion U and the tearing portion 5. is there. However, in the second invention, since the opening-side embossed projections 8 are added, an interval corresponding to the interval α in the first invention is the interval γ between the opening-side embossed projections 8 and the tear portion 5. 7 is an opening strip 5a as in the first invention.
It is a strip projection provided in.

FIG. 7 is a cross-sectional view of a bag body with a zipper according to a mere combination of the prior art, and shows a situation in which the gripping of the opening is complicated.

[0022]

(Effect of the invention) (First embodiment) (a) Since tearing by the opening strip 5a is guided by the upper closing portion U and the embossed convex portion 4 (α, β) close to the tearing portion 5, smoothness can be obtained. is there.

(B) The distance α between the tearing portion 5 and the upper closing portion U
When the distance β between the torn portion 5 and the embossed convex portion 4 is approximately approximated, the tearing becomes smoother.

(C) When the opening strip 5a at the tearing portion 5 is reinforced by the strip projection 7, the tearing becomes smoother and the opening strip 5a
It is possible to prevent the sticker from being easily opened due to stretching or tearing.

(D) After the tear-off portion 5 is opened by the tear-off strip 5a, the film between the upper closing portion U and the tear portion 5 floats little, while the bag film between the tear portion 5 and the chuck 3 floats. Therefore, the bag film can be easily gripped, that is, used as a bag with a chuck.

(E) Since the bag film serving as the opening is reinforced by the embossed protrusions 4, surface contact with the facing film can be prevented, and the opening also serves as a non-slip when the chuck is opened. Is easy. The facing film may be provided with an embossed projection for the purpose of preventing slippage.

(Second Embodiment) The tearing portion 5 can also be formed by providing the opening-side embossed convex portion 8 between the upper closing portion U and the tearing portion 5 at a distance γ from the tearing portion 5.
Can be smoothly torn.

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment of a bag according to the present invention;

FIG. 2 is a front view showing a state in which the tear portion 5 is torn by an opening strip 5a.

FIG. 3 is an enlarged cross-sectional view of f3-f3 in FIG. 2;

FIG. 4 is a front view of a bag according to a modification of the first invention;

FIG. 5 is an enlarged cross-sectional view of f5-f5 in FIG. 4;

FIG. 6 is a sectional view of a bag according to a second embodiment;

FIG. 7 is an explanatory view showing a state in which the grip of the opening of the bag body with a chuck is complicated.

[Explanation of symbols]

1: bag of the present invention, 2: hanging hole, 3: chuck, 4:
Embossed convex part, 5: tear part, 5a: opening strip,
6: missing part, 7: strip projection, 8: embossed part on the opening side, S: side seal, U: upper closed part.

Claims (4)

(57) [Scope of request for utility model registration] 1. A bag having a tear portion that is configured to tear open one side of the bag with two slit lines for opening, both sides are side-sealed S, and an upper end is closed by an upper closing portion U. It has a chuck 3 that connects both side seals S at a distance from the upper closing portion U, and is parallel to the chuck 3 between the chuck 3 and the upper closing portion U and at a distance α from the upper closing portion U. An adjacent tearing portion 5 is provided, and a bag film between the tearing portion 5 and the chuck 3 which are relatively spaced apart from each other is separated from the base film of the chuck 3 by a series or a separate embossed convex portion 4. A synthetic resin bag with a zipper characterized by being reinforced at intervals β and β. 2. A bag made of synthetic resin with a chuck according to claim 1, wherein an interval α between the tear portion 5 and the upper closing portion U and an interval β between the tear portion 5 and the embossed convex portion 4 are approximated. 3. Opening strip 5a at tear 5
The synthetic resin bag body with the chuck according to claim 1 or 2, wherein the bag is reinforced by a strip projection (7). 4. In a bag having a tear portion which is configured to tear open one side of the bag by two slit lines for opening, both sides are sealed with a side seal S, and an upper end is closed with an upper closing portion U. It has a chuck 3 that connects both side seals S at an interval from the upper blocking portion U, and a tear portion 5 is provided between the chuck 3 and the upper blocking portion U in parallel with the chuck 3. Tear the bag film between the closed portions U
The opening side embossed convex portion 8 and the bag film between the tear portion 5 and the chuck 3 are spaced apart from the base film of the chuck 3 by a series or a separate embossed convex portion 4 so as to form an interval β between the tear portion 5 and the opening portion. A synthetic resin bag with a zipper characterized by being reinforced in each case.