Laminated sheet packaging outlet opening / closing device

Abstract

The present invention provides an opening and closing device for a laminated sheet packaging body, which allows sheets to be removed one at a time from the opening of the bag, and which is attached around the opening and has a lid for opening and closing the opening. [Solution] The bag body 2 is attached by joining the first frame body 6 and the second frame body 7 with their first opening 8 and second opening 11 facing the dispensing opening 4 from the inside and outside, and locking the two frames together, sandwiching the surrounding area 4a of the dispensing opening. A lid seal packing 20 is attached to the outer circumference of an annular protrusion 14 erected on the second frame body 7, and the packing is configured to seal the upper space of the second opening 11 when the lid is closed. A gap seal packing 22 is inserted into an annular groove 14a that opens downward and is formed in the annular protrusion 14, and the packing is configured to create an airtight seal between the surrounding area 4a and the second frame body 7. This makes it easy to attach the bag to the dispensing opening of the laminated sheet packaging, and also maintains the airtightness of the bag.

Description

Technical Field

[0001] The present invention relates to an opening / closing device that opens and closes an outlet of a laminated sheet package configured to be able to take out the laminated sheets one by one from the outlet of a bag body containing the laminated sheets, the opening / closing device being mounted on a peripheral portion of the bag material of the bag body that surrounds the outlet.

Background Art

[0002] There are commercially available laminated sheet packages in which sheets such as wet tissues are laminated and housed in a bag body. At this time, the bag body is provided with an outlet, and it is possible to take out the sheets one by one.

[0003] Generally, in a laminated sheet package, a sheet-like lid material that can be freely opened and closed is adhered to the outlet. Therefore, the outlet can be opened by peeling off the lid material, and the outlet can be closed by adhering the lid material again.

[0004] However, peeling off and re-adhering the sheet-like lid material is a complicated operation, and there is a problem that a complicated operation is required every time the sheet is taken out.

[0005] Therefore, there is provided an opening / closing device that can be attached to the outlet of a laminated sheet package by retrofitting and is configured to be able to open and close the lid with one touch.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0007] Conventional opening and closing devices are configured to be attached to a laminated sheet packaging body by having a first frame with a first opening facing the dispensing opening from inside the bag body, and a second frame with a second opening facing the dispensing opening from outside the bag body. The two frames are locked and fixed together, and the device is attached by the two frames clamping the surrounding portion of the bag material of the bag body that surrounds the dispensing opening from above and below.

[0008] Furthermore, a lid that can be opened and closed is provided on the second frame located on the outside of the bag, and this is configured to open and close the second opening. That is, when the lid is opened, the dispensing opening and the first opening open together with the second opening, so the sheet can be grasped with the fingertips and pulled out. After that, when the lid is closed, the dispensing opening and the first opening close together with the second opening, so the operation can be performed with a single touch.

[0009] However, conventional opening and closing devices do not take into account the airtightness of the packaging, so in the case of packaging containing wet wipes in particular, there is a problem that moisture inside the bag leaks out, causing the wet wipes to dry out.

[0010] According to the inventor's knowledge, an airtight seal can be achieved by providing a gasket that seals when the lid is closed between the second frame located outside the bag and the lid. However, the idea of ​​providing a sealing means between the periphery of the bag's opening and the second frame is not known. Therefore, internal moisture does not leak out through the lid from the opening, but it does leak out through the narrow gap between the periphery and the second frame from the opening.

[0011] In this regard, Patent Document 3 discloses a configuration in which upward-facing ribs are provided on a first frame positioned inside the bag, and an annular groove is formed on a second frame positioned outside the bag, with the ribs inserted into the annular groove, sandwiching the peripheral portion of the bag material. This technical configuration aims to integrate the first frame, the peripheral portion, and the second frame in a sandwich-like manner. As a result, the gap between the peripheral portion of the opening and the second frame is formed into a labyrinthine structure by the bending of the peripheral portion, which has the effect of preventing moisture leakage to some extent, but it cannot prevent moisture from leaking through the labyrinth.

[0012] Furthermore, when attaching the opening and closing device to the packaging, it is necessary to push up the area around the opening from below with ribs while pushing it into the annular groove, which requires physical strength and is difficult for women and girls. Moreover, if the device is forced into the annular groove with too much force, there is a risk of cracks or pinholes forming in the bag material, which can lead to moisture leakage.

[0013] The objective of this invention is to provide an opening and closing device for the dispensing outlet of a laminated sheet packaging body that solves the above-mentioned problems. [Means for solving the problem]

[0014] Therefore, the means configured in this invention is an opening and closing device for a laminated sheet packaging body in which laminated sheets can be taken out one sheet at a time from the opening of the bag body containing the laminated sheets, the opening and closing device is attached to the surrounding part of the bag material of the bag body that surrounds the opening, and the opening and closing device is composed of a first frame body facing the opening from inside the bag body and a second frame body facing the opening from outside the bag body, the first frame body has a first opening facing the opening and a first annular part that is superimposed on the lower surface of the surrounding part, and a locking means is provided near the edge of the opening, the second frame body has a second opening facing the opening and a second annular part that is superimposed on the upper surface of the surrounding part, and a locking means is provided that can be detachably locked to the locking means of the first frame body, and a lid that can be opened and closed closes the second opening and is pivotally connected to the second annular part, the locking means and the locking means are locked to each other When the lid is closed, the first clamping portion formed on the upper surface of the first annular portion and the second clamping portion formed on the lower surface of the second annular portion are positioned close to each other and are configured to clamp the periphery of the bag material. The second frame is configured such that an annular ridge is erected on the second annular portion surrounding the second opening, and a lid sealing packing is attached to the outer circumference of the annular ridge, so that when the lid is closed, the annular sealing portion formed on the lid is brought into close contact with the lid sealing packing, thereby sealing the second opening. The annular ridge forms an annular groove that opens downward, and a gap sealing packing is inserted into the annular groove, and the gap sealing packing has a projecting portion that protrudes below the second clamping portion. When the locking means is locked to the locked means, the projecting portion is pressed against the periphery of the bag material from above the first clamping portion of the first frame, and the space between the periphery and the second annular portion is airtightly sealed.

[0015] In a preferred embodiment of the present invention, the gap sealing packing is integrally molded with an insertion portion that is inserted into the annular groove and a lateral wall formed by bending inward from the insertion portion, and the lateral wall constitutes the impact portion. [Effects of the Invention]

[0016] The opening and closing device of the present invention is easy to operate for attachment to the outlet of the laminated sheet package, and can maintain the airtightness of the bag body.

Brief Description of the Drawings

[0017] [Figure 1] It is a perspective view showing the state before attaching the opening and closing device to the outlet of the laminated sheet package according to an embodiment of the present invention. [Figure 2] It shows the state where the opening and closing device is attached. (A) is a perspective view of the state where the lid is opened, and (B) is a perspective view of the state where the lid is closed. [Figure 3] It shows the state where the first frame body and the second frame body are separated. (A) is a perspective view, (B) is a cross-sectional view taken along line A-A, and (C) is a cross-sectional view taken along line B-B. [Figure 4] It shows a cross-section corresponding to the cross-section along line A-A regarding the attachment method of the opening and closing device. (A) is a cross-sectional view showing the state where the first frame body is arranged inside the bag body and the second frame body faces from above, (B) is a cross-sectional view showing the attached state where the second frame body is coupled to the first frame body, and (C) is an enlarged cross-sectional view showing the main part in the attached state. [Figure 5] It shows a cross-section corresponding to the cross-section along line B-B regarding the attachment method of the opening and closing device. (A) is a cross-sectional view showing the state before attachment where the first frame body is arranged inside the bag body and the second frame body faces from above, (B) is a cross-sectional view showing the attached state where the second frame body is coupled to the first frame body, and (C) is an enlarged cross-sectional view showing the main part in the attached state. [Figure 6] It shows a comparative example for the present invention. (A) is a cross-sectional view showing the state before attachment, (B) is a cross-sectional view showing the attached state, (C) is an enlarged cross-sectional view showing the main part during attachment, and (D) is an enlarged cross-sectional view showing the main part in the attached state.

Embodiments for Carrying Out the Invention

[0018] The preferred embodiments of the present invention will be described in detail below based on the drawings.

[0019] The laminated sheet package 1 is a known commercially available product, which contains a sheet laminate 3 in which sheets such as wet tissues are laminated inside a bag body 2, and it is possible to take out the sheets one by one from a substantially oval-shaped outlet 4 provided in the bag body 2.

[0020] Therefore, the opening and closing device 5 of the present invention is attached to the peripheral portion 4a surrounding the outlet 4 among the bag materials of the bag body 2 and is used to open and close the outlet 4.

[0021] The opening and closing device 5 is composed of a first frame body 6 facing the outlet 4 from the inside of the bag body 2 and a second frame body 7 facing the outlet 4 from the outside of the bag body 2, and is attached in a state of sandwiching the peripheral portion 4a.

[0022] (First frame body) The first frame body 6 has a first opening 8 substantially the same shape as the outlet 4 and is provided with a first annular portion 9 to be overlapped on the lower surface of the peripheral portion 4a, and forms a locking means 10 that stands upward through the outlet 4 from the edge of the opening 8.

[0023] In the case of the illustrated embodiment, the locking means 10 is arranged at the opposite edges of the opening 8 and is provided with locking claws 10a protruding outward at the upper end portion.

[0024] The first annular portion 9 is formed by a plate with a predetermined thickness provided with a flat first clamping portion 9a on the upper surface, and is provided with downward reinforcing ribs 9b on the outer peripheral edge.

[0025] (Second frame body) The second frame body 7 has a second opening 11 substantially the same shape as the outlet 4 and is provided with a second annular portion 12 to be overlapped on the upper surface of the peripheral portion 4a, and forms a locked means 13 for detachably locking the locking claws 10a of the locking means 10.

[0026] The second annular portion 12 has a flat second clamping portion 12a formed on its lower surface by a plate of a predetermined thickness from which the second opening 11 is made, and an annular raised portion 14 is erected surrounding the second clamping portion 12a. Furthermore, an outer frame portion 15 is formed surrounding the annular raised portion 14, and the lid 16 is pivotally connected to the outer frame portion 15.

[0027] The lid 16 is pivotally supported on the outer frame 15 so as to be rotatable around a pivot (not shown), and rotates between the open position shown in Figure 2(A) and the closed position shown in Figure 2(B) to open and close the second opening 11. At this time, the lid 16 is provided with an elastic hinge 17 made of an elastic plate, which is always biased in the direction of the open position.

[0028] When the lid 16 is closed by elastically deforming the elastic hinge 17, the lid 16 and the outer frame 15 are provided with engaging and disengaging means 18a and 18b, which consist of projections and recesses that engage and disengage with each other, and are configured to maintain the closed position. In this case, as shown in Figure 1, the engaging and disengaging means 18a of the outer frame 15 constitutes a flexible, swingable push button 19. Therefore, when changing from the open position to the closed position, the push button 19 swings, causing the engaging and disengaging means 18a and 18b to automatically engage. When opening the lid 16 from the closed position, the engagement is released by pressing the push button 19, and the elastic hinge 17 biases the lid 16, allowing it to be opened automatically.

[0029] The annular protrusion 14 has a lid seal packing 20 attached to its outer circumference, and is configured to form a sealed space above the second opening 11 when the lid 16 is in the closed position. For this reason, an annular sealing portion 21 consisting of ribs that are in close contact with the lid seal packing 20 when the lid is closed is provided on the inside of the lid 16. As a result, when the lid is closed, the internal space surrounded by the lid seal packing 20 and the annular sealing portion 21 above the second opening 11 is sealed and isolated from the outside air.

[0030] (Seal structure between the second frame and the bag) The annular protrusion 14 forms an annular groove 14a that opens downward, and a gap sealing packing 22 is inserted into the annular groove 14a. The gap sealing packing 22 forms an impact portion 22a that protrudes below the second clamping portion 12a.

[0031] In a preferred embodiment, as shown in Figures 4(C) and 5(C), the gap sealing packing 22 is formed in an L-shaped ring form from an elastomer such as silicone rubber, and includes an annular insertion portion 22b that is inserted into the annular groove 14a, and the impact portion 22a is formed by integrally molding a lateral wall that is bent inward along the second clamping portion 12a from the insertion portion 22b.

[0032] When attaching the opening / closing device 5 to the dispensing opening 4 of the bag body 2 in the laminated sheet packaging body 1, first, as shown in Figures 4(A) and 5(A), the first frame body 6 is positioned inside the bag body 2 with the first opening 8 facing the dispensing opening 4 and the first clamping portion 9a facing the inner surface of the surrounding portion 4a. Then, the second frame body 7 is positioned outside the bag body 2 with the second opening 11 facing the dispensing opening 4 and the second clamping portion 12a and the gap sealing packing 22 facing the outer surface of the surrounding portion 4a.

[0033] From this state, as shown in Figures 4(B) and 5(B), when the first frame 6 and the second frame 7 are brought together so as to sandwich the peripheral portion 4a of the bag body 2, the flexible locking means 10 swings, causing the locking claw 10a to engage with the locked means 13, and the two frames 6 and 7 are connected and fixed. The positional relationship between the locking claw 10a of the locking means 10 and the locked means 13 is configured such that the first clamping portion 9a and the second clamping portion 12a are close together with the peripheral portion 4a in between, and when the impact portion 22a of the gap sealing packing 22 is compressed, the locking claw 10a engages with the locked means 13.

[0034] Therefore, the peripheral portion 4a is pressed down by the gap-sealing packing 22 and comes into close contact with the upper surface of the first clamping portion 9a, and the impact portion 22a is compressed by elastic deformation and pressed against the peripheral portion 4a, and in this state the first annular portion 9, the peripheral portion 4a and the second annular portion 12 are joined and integrated in a sandwich-like manner. As a result, the space between the peripheral portion 4a and the second annular portion 12 is airtightly sealed, so that moisture inside the bag 2 does not leak out to the outside air by traveling along the outer surface of the peripheral portion 4a from the outlet 4.

[0035] In this invention, by utilizing the annular protrusion 14 provided on the second frame 7 and attaching a lid sealing packing 20 to the outside of the annular protrusion 14, it is possible to create an airtight seal of the second opening 11 when the lid is closed. At the same time, by inserting a gap sealing packing 22 into the annular groove 14a on the inside of the annular protrusion 14, it is possible to create an airtight seal between the surrounding area 4a of the outlet 4 and the second annular part 12 at all times, regardless of whether the lid is open or closed. Thus, the annular protrusion 14 has a dual effect.

[0036] (Comparative example) Figure 6 shows a comparative example of the present invention. In the comparative example, instead of the configuration of the gap sealing packing 22 described above for the present invention, the annular groove 14a of the annular protrusion 14 is opened, and the push-in rib 23 erected on the first annular portion 9 of the first frame 6 is inserted into the annular groove 14a.

[0037] In the comparative example, when attaching the opening / closing device 5 to the dispensing opening 4 of the bag body 2 in the laminated sheet packaging 1, first, as shown in Figure 6(A), the first frame body 6 is positioned inside the bag body 2 facing the dispensing opening 4, and the second frame body 7 is positioned outside the bag body 2 facing the dispensing opening 4. From this state, as shown in Figure 6(B), when the first frame body 6 and the second frame body 7 are brought together so as to sandwich the peripheral portion 4a of the bag body 2, the locking means 10 and the locking means 13 lock together, and the two frame bodies 6 and 7 are connected and fixed. At this time, the push-in rib 23 is bent and pushed into the annular groove 14a while pushing up the peripheral portion 4a, thereby connecting the first frame body 6, the peripheral portion 4a, and the second frame body 7 in a sandwich-like manner.

[0038] The gap between the peripheral portion 4a of the outlet 4 and the second frame 7 forms a labyrinthine structure because the peripheral portion 4a is bent inside the annular groove 14a. However, as shown in the figure, it does not come into close contact with the inner wall surface of the annular groove 14a around its entire circumference, so it is not possible to prevent moisture from passing through and leaking to the outside.

[0039] In the comparative example, when attaching the opening / closing device 5 to the packaging 1, it is necessary to push up the surrounding area 4a of the dispensing opening 4 from below with the rib 23 and push it into the annular groove 14a. Therefore, the attachment work requires physical strength, and if the device is forced into the annular groove 14a with strong force, there is a risk of cracks or pinholes forming in the bag material, which may cause moisture to leak out and the inside of the bag to dry out prematurely. [Explanation of symbols]

[0040] 1. Laminated sheet packaging 2 bags 3-sheet laminate 4 Outlet 4a Peripheral area 5. Opening and closing device 6. Frame 1 7. Second Frame 8. First opening 9. First Ring Section 9a First clamping part 9b Reinforcement rib 10 Locking means 10a Locking claw 11. Second opening 12 Second Ring Section 12a Second clamping part 13 Locked means 14 Ring-shaped raised area 14a Ring groove 15 Outer frame 16 Lid 17 Elastic hinge 18a, 18b Engagement / disengagement means 19 Push buttons 20. Sealing gasket for lid 21 Annular seal section 22 Gap sealing packing 22a Impact area 22b Insertion section 23. Indented rib (comparative example)

Claims

1. A laminated sheet packaging body is configured such that one sheet at a time can be removed from the opening of the bag body containing the laminated sheets, and the opening / closing device is attached to the surrounding portion (4a) of the bag material of the bag body (2) that surrounds the opening (4) and opens and closes the opening. The opening and closing device is composed of a first frame (6) facing the outlet (4) from inside the bag and a second frame (7) facing the outlet (4) from outside the bag. The first frame (6) has a first opening (8) facing the outlet and a first annular portion (9) that overlaps the lower surface of the peripheral portion (4a), and a locking means (10) is provided near the edge of the opening (8). The second frame (7) has a second opening (11) facing the outlet and a second annular portion (12) that overlaps the upper surface of the peripheral portion (4a), and is provided with a locking means (13) that can be detachably locked to the locking means of the first frame, and is provided with a lid (16) that can be opened and closed to close the second opening (11), When the locking means (10) and the locked means (13) are locked together, the first clamping portion (9a) formed on the upper surface of the first annular portion and the second clamping portion (12a) formed on the lower surface of the second annular portion are positioned close to each other to clamp the peripheral portion (4a) of the bag material. The second frame (7) is configured such that when the lid (16) is closed, the annular seal portion (21) formed on the lid comes into close contact with the lid seal packing (20), thereby sealing the upper space of the second opening (11). The annular protrusion (14) has an annular groove (14a) that opens downward, and a gap sealing packing (22) is inserted into the annular groove, and the gap sealing packing has an impact portion (22a) that protrudes below the second clamping portion (12a). An opening and closing device for the dispensing port of a laminated sheet packaging, characterized in that when the locking means (10) is locked to the locked means (13), the impact portion (22a) is pressed against the peripheral portion (4a) of the bag material from above the first clamping portion (9a) of the first frame, and the space between the peripheral portion (4a) and the second annular portion (12) is airtightly sealed.

2. The gap sealing packing (22) is characterized in that it is integrally molded with an insertion portion (22b) that is inserted into the annular groove (14a) and a lateral wall that is bent inward along the second clamping portion (12a), and the lateral wall constitutes the impact portion (22a), as described in claim 1, for the opening and closing device of the dispenser of a laminated sheet packaging.

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