JP3044618B2 - Bag opening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible mouth opening structure of a flexible bag used for a garbage bag, a bag for container interior, a portable toilet bowl, etc., without shape retention.

[0002]

2. Description of the Related Art Since a bag of this type is mainly made of a relatively thin sheet made of a flexible synthetic resin film, the rim of the bag has a weak rim with no bearing force. In addition, due to the formation of static electricity and the like, the opening of the bag and the maintenance of the bag at the time of loading and unloading of stored items are difficult and difficult to use.

[0003] In some simple toilets, a frame is integrally formed at the edge of the bag, but the frame is unfolded in use to hold the opening of the edge of the bag. The body itself is forced into a complicated foldable structure, which incurs high costs and combines the rim of the foldable bag with a wide impact-resistant frame that cuts open a flat plate. Because it is a configuration that folds, the frame is configured in a horizontal state orthogonal to the rim of the bag, and the wide frame expands flat on a plane when used, so it is hard to use and it can be used as a container There was a problem that it was difficult to put the contents in and out.

[0004]

SUMMARY OF THE INVENTION The present invention reduces the manufacturing cost by simplifying the folding and unfolding configuration of the opening portion of the bag as such a bag opening device.
Efficient opening operation of the rim of the bag during loading and unloading of the bag, as well as maintaining the open state, improving ease of use, and easily folding and closing the lip of the bag after loading and unloading. Is what you do.

[0005]

Means for Solving the Problems In order to achieve the above-mentioned object, a bag opening device of the present invention includes a rigid-rigidity-preserving strip made of any material such as synthetic resin, cardboard, corrugated paper, and the like. Provide a cross-shaped folding part at three places or four places so that it can be folded in the direction, and form a series of short cylinders,
Up and down along the waist so that its upper edge can be folded outward
A vertical folded portion is provided at the
A control folding part is provided in a crosswise shape, which is separated from the folded part to the upper edge, and is controlled to fold only inward at one or two opposing pieces between the transverse folding parts. And the entire periphery of the rim portion of the bag body formed of a flexible sheet-like membrane plate made of any material such as synthetic resin and paper is adhesively bonded to the lower edge of the opening guide portion. It is proposed to make the opening of the bag body easy and reliable.

[0006] The opening guide portion is easy to fit in the same vertical direction as the rising upper edge of the bag having a simple structure, and the connection structure by adhesion, welding, or the like can be firmly and reliably performed.

[0007] By expanding the left and right opposing folds, the transverse fold is expanded, and at the same time, the fold having the control fold between the folds is spread out in a straight-out state and outwardly. Is maintained by the action of the tension force and the bending force as a control mechanism that does not bend, the opening is kept open, such as triangular or square, and the opening edge of the bag is opened. By simply pressing the tatami part from the inside, the open state is easily released using the repulsive force of the tension force and the bending force and folded inward, and the opening lead part is folded flat on the belly and the bag body Close the lip of the mouth.

[0008] In the upper edge which is folded to the outside of the opening guide, two control folds having different directions due to folding are formed continuously in a foldable piece having a control fold. The function is strengthened so that the opening state of the opening guide portion is further ensured, and the folded upper edge makes it easier to hold the edge of the bag as a handle.

In an opening device in which one or two of the opening guides having four transverse folds are folded inward at the upper edges of the folds, the opposing folds are pushed open to form a square. By folding the control folding edge of the developed opening guide inward,
Separation of the control folding edge The control edges at both ends support the inner wall of the adjacent upright folding piece in a stretched state and maintain a rectangular opening to open and close the opening edge of the bag body. The sides are turned upright from the folded state and separated, and the both sides are removed from the adjacent folded pieces to release the square supporting force of the opening guide and fold flat on the belly to flatten the mouth of the bag. Close the edges.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The bag opening device according to the present invention uses a cross-folding portion provided in a series of short tubular opening guide portions made of a shape-retaining strip made of synthetic resin, cardboard, or the like, so that the opening guide device can be opened and unfolded. Part is formed to open in a triangle or square shape, and the upper edge
Longitudinal folding between the top and bottom along the waist so that it can be folded
Part is provided, and the transverse folding part is moved from the longitudinally folded part to the upper edge.
And a control fold that folds only inward on one or two of the folds between the folds is provided transversely,
The lower edge of the opening guide is joined to the edge of a flexible bag made of a material such as synthetic resin or paper. The opening of the bag body is secured by the tension and the bending force.

Another embodiment will be described. Similarly, a series of short tubular opening guides made of a shape-retaining strip of a material are formed so as to be opened in a rectangular shape by a transverse fold, and the opening is made at the time of opening. The guiding portion is configured to fold the upper edge inward by the vertically folding portion and the separating portion provided on one or two opposing folding pieces between the folding portions, and the lower edge of the opening guiding portion is formed. Characterized by connecting the lip of a flexible bag made of the same material such as synthetic resin to the inside of the bag. The sides are separated and the inner walls of the adjacent folded pieces that stand upright at both ends are supported to secure the square shape of the opening guide, and the bag is opened.

[0012]

An embodiment of a bag opening device according to the present invention will be described with reference to the drawings. 1 to 8 are views for explaining an embodiment of a bag opening device. In FIGS. 1 and 2, the cardboard-shaped rigid-retainable band-shaped band made of a synthetic resin material is folded inside at three places outside. Folds 3 and 3 formed of transverse cuts that can be formed, and one fold piece 2 between the folds 3 and 3 is outwardly folded so as to fold only from the center to the inside. A control fold 4 comprising transverse cuts parallel to 3 is provided to form a series of short cylinders in order to develop the whole into a triangle .
A longitudinal section inside the upper and lower parts along the longitudinal direction of the folding pieces 2 and 2
In addition to providing folding portions 5 and 5 made of cuts,
3 from the folded part 5 to the upper rim,
So that the upper edge is folded outward to become folded edges 2a, 2a
Thus, the opening guide 1 is obtained.

A sheet-like membrane plate made of a synthetic resin material such as vinyl chloride is formed in the bag 7, and the edge 7a of the bag 7 is attached to the inside of the lower edge 1a of the opening guide 1 with an adhesive or hot melt. It is joined by wearing to form a bag opening device.

In FIG. 3 to FIG. 5, the control folding part 4 in the opening guide part 1 pushes the folding pieces 2, 2 outward when the opening is opened. Due to the tension, the control folding part 4 of the folding piece 2 between the two folding pieces 2 and 2 is developed in a straight line, and the hinge part 4a of the notch-like controlling folding part 4 is abutted against each other. , 4b, the triangular opening is secured by maintaining the straightness of the folding piece 2 by the bending and warping force, thereby guiding the edge 7a of the bag body 7 to the opening.
The folding edges 2a, 2a are folded outward to protrude in a flange shape.
As a result, this is applied to the folding piece 2 provided with the control folding section 4.
The control folding section 4 provided on one folding piece 2
The folding part 4 is folded by the folding part 5 with the lower edge 1a.
Control action works in different directions, like falling edge 2a
The straight folding of the control folding part 4 at the lower edge 1a is
a of the folding piece 2 which is strongly locked by
When the opening of the bag is secured by holding the straight
In addition, the folded edges 2a, 2a serve as handles and
Makes input work easier. Also by pushing outwardly the control folding portion 4 from the inside, the hinge portion 4a and a control section 4b,
4b, the opening guide 1 is folded flat into a belly-like shape by using the reaction force, and the opening 7a of the bag 7 is closed.

The control folding section 4 can be folded only inward, and has a structure for controlling the folding piece 2 so that it does not bend outward more than the straight plate when unfolded. The folding piece 2 is formed so as to be cut and separated in the same plane from the central portion, and a hinge member such as a band that can be bent over both cut surfaces is attached to the inner surface in which both cut surfaces are brought into a straight plate state. It is also possible to form a control folding section 4 by being connected so as to be foldable.

In FIGS. 6 and 7, by providing uneven control portions 4b, 4b facing the abutting surface of the control folding portion 4, the tension of the expanded folding pieces 2, 2 can be reduced by the uneven fitting portion. The straight deployment and holding of the folding piece 2 having the control folding part 4 at the time of opening is further ensured.

FIG. 8 is a view showing the folding part 3 of the opening guide part 1.
The opening guide portion 1 is folded flat by a folding portion 3 formed of a cut provided on the outside to close the lip portion of the bag, and the folding portion 3 is closed as described later. Depending on the material, it can be folded inward by a press-shaped folding portion provided inside.

[0018]

The next embodiment of the present invention will be described with reference to FIGS. 9 to 11. Referring to FIGS. 9 to 11, a shape-retaining strip made of a synthetic resin material is also formed by a fold formed of four cutouts provided at four outer locations. In order to be folded inward by the fold portions 3 and 3, the entirety is formed in a short cylindrical shape so as to be expanded in a rectangular shape. In order to control the folding of the folding pieces 2 and 2 only from the center to the inside, control folding sections 4 and 4 comprising cuts having hinge sections 4a and control sections 4b and 4b for controlling the folding sections are provided. Folding portions 5 and 5 composed of longitudinal cuts are provided inside the upper and lower portions along the longitudinal direction of the pieces 2 and 2, and the folds 3 and 3 are separated from the folding portion 5 to the upper edge by cutting 3 a. 3a, each upper edge is folded outward to form folded edges 2a, 2a to form the opening guide 1.

The opening 7a of the bag is formed by bonding an edge 7a of a flexible bag 7 made of a synthetic resin sheet-like membrane plate to the inside of the lower edge of the opening guide 1 with an adhesive or heat welding. Configure the device.

As shown in FIGS. 10 and 11, when the opening guide portion 1 is opened, the folded edges 2a are folded outward and project in a flange shape, which is provided with the control folding portion 4. Tatami piece 2
In the above, the control folding section 4 is provided on one folding piece 2 while the folding section 5 controls the control folding section 4 so that the lower edge 1 a
Since the control action acts in different directions such as the folding edge 2a and the folding edge 2a, the straight development of the control folding portion 4 at the lower edge 1a is strongly locked by the folding edge 2a, and the control folding portion 4 In addition, the folded pieces 2 and 2 provided with the folds 2 and 2 are more reliably held to secure a rectangular opening of the bag, and the folding edges 2a and 2a serve as handles to put the articles into the bag. To facilitate.

[0021]

12 and 13 show another embodiment of the present invention.
If it explains using, the press-shaped folding part 3 which carved the shape-retaining strip made of corrugated paper across four inner places
3 to form a series of short cylinders so as to be folded inward and expand the whole into a square shape, and a longitudinal section is formed inside the two folded pieces 2 facing each other between the folded portions 3 Of the folding pieces 2 and 2 are formed by the press-shaped folding portions 6 and 6 and the separating portion 3a which cuts the folding portions 3 and 3 from the folding portion 6 to the upper edge. Is folded inward to form the control folding edge 2b to form the opening guide 1.

The opening portion of the bag is formed by connecting the edge of the flexible bag made of a synthetic resin material to the inside of the lower edge of the opening guide 1. The control folding edge 2 of the folding pieces 2, 2 provided with the longitudinally folding part 6 by pushing and expanding the opposing folding pieces 2, 2 outward and expanding them in a rectangular shape.
b, 2b are tilted inward, and the control sides 2c, 2c at both ends of the separation parts 3a, 3a push the inner walls of the adjacent upright foldable pieces 2, 2 in a protruding state to maintain a square shape. Open the lip of the bag.

To close, the folded control edges 2b, 2b of the opening guide 1 are turned upside down, and the control sides 2c, 2c at both ends are placed inside the adjacent folded pieces 2, 2 standing upright. By removing it from the wall, the supporting state is released and the square maintaining force is released, and the opening guide part 1 is folded flat on the opposite folding parts 3 and 3 as an axis, and the lip of the bag body is opened. Close the part.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bag 7 connected to an opening guide 1 comprising folding pieces 2 and 2 provided with a folding section 3 and a control folding section 4 according to the present invention will be described with reference to FIGS. To explain,
A bag 7 is formed by forming an airtight and flexible thin film made of any material such as polyethylene, vinyl chloride, polyvinyl alcohol, and paper so as to have fold-like gore portions 7b on both left and right sides. (See FIG. 14) or formed into a flat bag body 7 without a gore using a similar film body (see FIG. 15), and using a flexible thin film body made of the same material to form a cylindrical long bag. An opening / closing member 9 and a short pressure member 10 are formed.
The pressure member 10 is inserted into the opening and closing member 9 so that the lower edge 9a projects from the lower edge 10b of the pressure member 10.
The upper opening edge 10a is joined and sealed to the outer peripheral side of the opening / closing member 9, and the pressure member 10 is joined to the opening / closing member 9 in a skirt shape and formed into an abdominal fold in two to form the introduction control unit 8, The upper edge 8a of the control unit 8 is joined and attached to the inside of the vicinity of the edge 7a of the bag body 7 in series, and is attached between the upper edge 8a of the introduction control unit 8 and the inner wall surface of the bag body 7. It is formed by joining and closing 11a so that a passage does not occur.

The bag 7 made of paper material is formed of a film surface-treated with a synthetic resin film or the like in order to maintain airtightness.
The lip 7a of the bag 7 is opened in conjunction with the opening of the opening guide 1, whereby the upper lip 8a of the introduction control unit 8 is forcibly opened (see FIG. 16). When the bag body 7 is accommodated in the bag body 7 and the bag body 7 is closed, the opening guide 1 is folded flat so that the opening 7a of the bag body 7 and the introduction control unit 8
The upper edge 8a is closed in a flat belly state (FIG. 17).
reference).

Since a small amount of air simultaneously flows into the bag 7 containing the articles even in the case of a solid article, the air is supplied to the upper edge of the introduction control section 8 which is the entrance and exit of the bag 7 by the external pressure applied to the bags 7. 8a, the lower opening edge 9 of the opening / closing member 9 having a flexible inner pressure due to the inflow air.
b, it progresses in the direction of the upper edge 8a along the outer peripheral surface of the opening / closing member 9 and develops between the pressure member 10 and the inner pressure of the opening / closing member 9 by the pressure action of the pressure member 10 from outside. Since the edge 9a is strapped from the outer periphery, the upper edge 8a of the introduction control unit 8, that is, the edge 7a of the bag body 7 is sealed, and the bag body 7 is closed and sealed by utilizing the internal pressure of the container. This is effective in that it is easy and secure.

The pressure control member 10 in the introduction control unit 8 is formed thicker than the opening / closing member 9 to increase the force for restoring the bellows, thereby increasing the pressurizing action to restore the flatness to the closed state. The operation works smoothly.

The upper edge 8a of the introduction control unit 8 can be formed smaller than the size of the edge 7a of the bag body 7 according to the purpose of use of the bag, and the diameter of the opening / closing member 9 is also the same. The same function and effect can be obtained by making the inner diameter of the sealing member 10 equal to the inner diameter of the sealing member 10, and it is also possible to manufacture it. The mounting and connecting structure achieves airtightness by the joint seals 11a and 11b. .

In the above embodiment, the opening guide 1 using a strip made of synthetic resin or paper as a material has been described.
The opening guide portion 1 can be formed by using any other material, and the bag 7 is also a flexible sheet-like film made of any material such as synthetic resin, paper, and fiber, in addition to vinyl chloride. When the liquid is stored in the bag 7 made of paper or fiber, it is applied in a laminate shape using a synthetic resin material and surface-processed to form a watertight and airtight structure. .

The bag 7 can be implemented by using a three-dimensional bag (not shown) having gores on the side and bottom surfaces, and furthermore, a simple toilet bowl, a garbage bag, and an inner bag for containers. It is also possible to carry out the opening device of the present invention on various bags.

Opening guide 1 in the opening device of the present invention
As described above, a cardboard-shaped shape-retaining strip made of synthetic resin, paper, or the like is formed in a series of short cylinders, and the even-numbered folding sections 3 or the control folding sections 4 provided on the strip are formed. It is configured to be folded flat by bellows by even number of folding parts 3 including it, and to be developed and opened in a triangular or square shape.
By joining the opposing inner surfaces of the opening guide portion 1 with a double-sided adhesive tape (not shown) laid in advance, it is possible to prevent the opening from being sloppy.

[0032]

The opening device for a bag according to the present invention has the above-described configuration, and simply presses and expands the opposing fold pieces of the opening guide portion folded flat to control the folding portion and the folding portion . in <br/> the opening guide portions by folding倒縁expand maintained rail-like, inherently flexible, the rim of the bad bag of settlement can be kept open state, facilitates the loading and unloading of the contained object To

At the time of folding, the control folding edge is raised straight.
Then, by pushing the opposite fold portion and the control fold portion outward, the opening guide portion can be easily folded flat into a belly-like shape and the rim portion of the bag body can be closed.

In particular, the folded portion of the strip of the opening guide portion,
This opening device, which has a simple structure including a control folding unit and a folding unit, can easily maintain an opening of an intractable bag made of a thin film plate, so that manufacturing costs can be greatly reduced and cost can be reduced. It can be provided at a low price corresponding to a cheap bag.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a folded state of a bag provided with an opening device embodying the present invention.

FIG. 2 is a perspective view of a main part showing an opened state of the bag of FIG. 1;

FIG. 3 is a cross-sectional plan view of a main part showing a deployed state of a control folding section in an opening guide section of the opening apparatus.

FIG. 4 is a cross-sectional plan view of a main part illustrating a folding process of a control folding unit in FIG. 3;

FIG. 5 is a cross-sectional plan view of a main part showing a folded state of the control folding unit in FIG. 4;

FIG. 6 is a cross-sectional plan view of a main part of another embodiment of the control folding section in the opening guide section of the opening device in an expanded state.

FIG. 7 is a cross-sectional plan view of a main part showing a folded state of the control folding unit in FIG. 6;

FIG. 8 is a cross-sectional plan view of a main part showing a folded part in the opening guide part of the opening device.

FIG. 9 is a perspective view of a main part showing a folded state of a bag provided with another opening device for carrying out the present invention.

FIG. 10 is a perspective view showing an open state of an opening guide in the bag of FIG. 9;

11 is a vertical sectional side view of a main part showing a folded part in the opening guide part of FIG. 10;

FIG. 12 is a perspective view showing an open state of an opening guide in another opening device embodying the present invention.

FIG. 13 is a cross-sectional plan view showing a folded portion in the opening guide of FIG.

FIG. 14 is a front view showing an embodiment of a bag equipped with an opening device embodying the present invention.

FIG. 15 is a perspective view of a folded state showing another embodiment of a bag equipped with an opening device embodying the present invention.

16 is a vertical sectional side view of a main part showing an opened state of the bag in FIG. 14;

17 is a longitudinal sectional side view of a main part showing a closed state of the bag in FIG. 14;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening guide part 2 Folding piece 2a Folding edge 2b Control folding edge 3 Folding part 3a Separating part 4 Control folding part 5, 6 Vertical folding part 7 Bag body 7a Mouth edge 8 Introduction control part 8a Mouth 9 Opening / closing member 9a Lower rim 10 Pressure member 10a Upper rim 11 Joint mounting part 11a, 11b Joint sealing part

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65F 1/00 B65D 33/02

Claims (3)

(57) [Claims] 1. A a strip having a shape retaining property consist of any material, with a cross-shaped folds into a three Kesho or four Kesho order to fold inwardly disposed to form a series short cylindrical, upper Lip facing outward
A vertical folding part is set up and down along the waist so that it can be folded.
And place the transverse fold from the vertically folded part to the upper edge.
With disconnecting Te, and the opening guide portions provided folding unit for controlling so as to fold only inwardly to one or two opposite folding piece between transverse folds in transverse shape, opening guide An opening device for a bag formed by connecting a lip portion of a flexible bag body made of an arbitrary material to a portion. 2. A strip having a shape-retaining property made of an arbitrary material is formed in a series of short cylinders so as to be folded inward by cross-shaped folds provided at four places. At least one of the folded pieces is provided with a vertically folded portion between the upper and lower sides along the waist so that the upper edge is folded inward, and the transverse folded portion of the folded piece is longitudinally folded. An opening device for a bag, wherein the opening guide portion is cut off from the folded portion to the upper edge to form an opening guide, and the opening edge of a flexible bag body made of an arbitrary material is connected to the opening guide. 3. The bag body is formed of an airtight material, and has a tubular long opening / closing member and a short pressure member with a flexible film body formed of an arbitrary material inside the vicinity of an edge portion thereof. , An opening / closing member is nested in the packing member so that the lower edge protrudes, and the upper opening edge of the packing member is joined to the outside of the opening / closing member to be sealed and joined in a two-folded apposition form. 3. The bag opening device according to claim 1, wherein the upper edges of the portions are joined in series.