Opening and closing structure of bag mouth plastic packaging machine

Abstract

The utility model discloses an opening and closing structure of a bag mouth plastic packaging machine, which belongs to the technical field of bag mouth plastic packaging machines, and comprises an upper shell, a lower shell and an opening and closing device, the opening and closing device comprises a movable seat, a telescopic bag and a base, the movable seat and the base are respectively matched and connected with the upper shell and the lower shell, and the upper end and the lower end of the telescopic bag are respectively fixedly connected with the movable seat and the base. A telescopic cavity is formed between the telescopic bag and the movable seat and / or the base, a first bent part, a second bent part and a third bent part are arranged on the side portion of the telescopic bag, and the first bent part, the second bent part and the third bent part are connected with one another and are matched with one another in a folding mode when the telescopic bag stretches out and draws back. The side portion of the telescopic bag is folded only through the first bending portion, the second bending portion and the third bending portion when the telescopic bag stretches out and draws back, the number of the folding positions of the telescopic bag can be reduced, the folding damage risk of the telescopic bag is reduced, the service life of the telescopic bag is prolonged, normal stretching out and drawing back of the telescopic bag are guaranteed, opening and closing between the upper shell and the lower shell are more stable, and reliability and practicability are high.

Description

Technical Field

[0001] The utility model relates to the technical field of bag laminators, in particular to an opening and closing structure of a bag laminator. Background Art

[0002] The utility model patent with Chinese patent number CN202020761452.2 discloses a negative pressure buckle device and a vacuum laminating machine. After the upper side of the telescopic bag is assembled, the upper end face of the sealing plate convex ring abuts the first folded edge, the outer periphery of the sealing plate convex ring abuts the inner wall of the telescopic bag, and the inner periphery of the sealing plate convex ring abuts the second folded edge. After the lower side of the telescopic bag is assembled, the third folded edge elastically abuts the folded edge positioning boss, and the fourth folded edge is pressed into the folded edge clamping groove. At the same time, the middle area between the upper and lower sides of the telescopic bag is soft, so when the telescopic bag is telescopic, its middle area will have at least three different positions of folding. However, at least three folding positions will increase the risk of damage to the telescopic bag after long-term repeated use, thereby causing air leakage in the first cavity, resulting in the telescopic bag being unable to expand and contract normally, affecting the opening and closing stability of the laminating machine. Therefore, further improvement is necessary. Utility Model Content

[0003] The utility model aims to provide an opening and closing structure of a bag laminating machine to overcome the deficiencies in the prior art.

[0004] An opening and closing structure of a bag laminator designed for this purpose includes an upper shell, a lower shell, and an opening and closing device. The opening and closing device includes a movable seat, a telescopic bag, and a base. The movable seat and the base are respectively connected to the upper shell and the lower shell, and the upper and lower ends of the telescopic bag are fixedly connected to the movable seat and the base respectively. A telescopic cavity is formed between the telescopic bag and the movable seat and / or the base. The side of the telescopic bag is provided with a first bending portion, a second bending portion, and a third bending portion. The first bending portion, the second bending portion, and the third bending portion are connected to each other and fold and cooperate with each other when the telescopic bag is expanded and contracted.

[0005] The first bending portion, the second bending portion, and the third bending portion are folded together in an arc or angle shape toward the inner side of the telescopic cavity.

[0006] The telescopic bag is annular, and the first bending portion, the second bending portion, and the third bending portion are sequentially arranged on a side of the telescopic bag from top to bottom.

[0007] The upper end of the telescopic bag is closed and is provided with an upper sealing top. The first bent portion is bent toward the base at the periphery of the upper sealing top. The telescopic bag is connected to the movable seat through the upper sealing top. The lower end of the telescopic bag is open and a lower connecting port is formed through the third bent portion at the periphery. The telescopic bag is connected to the base through the lower connecting port, and the telescopic cavity is formed between the two.

[0008] A fixing plate is provided at the upper end of the telescopic bag, and the fixing plate is pressed on the upper sealing top and fixed to the movable seat by fixing parts, buckles, adhesion, or any combination thereof.

[0009] A movable seat limiting edge extends from the bottom surface of the movable seat, and the movable seat limiting edge is spaced apart and matched with the periphery of the fixed plate to form a limiting groove, and the first bending portion is limited in the limiting groove.

[0010] A positioning ring is provided on the telescopic bag, and a lower connecting flange extends from the periphery of the third bending portion. The positioning ring is pressed on the lower connecting flange and is fixed to the base by fixing parts, snaps, adhesion, or any combination of the above.

[0011] A positioning ring groove is provided on the base, and the lower connecting flange is positioned on the positioning ring groove by pressing the positioning ring.

[0012] The fixing plate is provided with a guide portion, and the base is provided with a guide matching portion. The guide portion and the guide matching portion correspond to each other, and an elastic member is provided between the two. The elastic member is elastically connected to the fixing plate and the base respectively.

[0013] The top surface of the movable seat and the upper shell are fixed to each other by fixing parts, snaps, pasting, or any combination of the above. The bottom surface of the movable seat extends a limiting protrusion toward the base. When the movable seat moves, the limiting protrusion acts on the base.

[0014] The bottom surface of the base and the lower shell are fixed to each other by fixing parts, snaps, adhesion, or any combination thereof.

[0015] The upper shell is further provided with an upper vacuum groove and an upper heating component located on one side of the upper vacuum groove. An upper sealing rubber ring is provided on the periphery of the upper vacuum groove.

[0016] The lower shell is further provided with a lower vacuum groove and a lower heating component located on one side of the lower vacuum groove. A lower sealing rubber ring is provided on the periphery of the lower vacuum groove.

[0017] The base is provided with a suction portion, which is communicated with the telescopic cavity and is connected with a suction device. The suction device is provided on the upper shell or the lower shell and is communicated with the lower vacuum groove or the upper vacuum groove.

[0018] The present invention improves upon the above-mentioned structure and utilizes the mutual connection between the first bending portion, the second bending portion, and the third bending portion, so that when the telescopic bag is extended or retracted, its side portions are folded only by relying on the first, second, and third bending portions, thereby effectively reducing the number of folding positions of the telescopic bag and lowering the risk of folding and damage to the telescopic bag. This not only increases the service life of the telescopic bag and ensures its normal extension and retraction, but also makes the opening and closing between the upper shell and the lower shell more stable, reliable, and highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the assembly structure of an embodiment of the present utility model.

[0020] Figure 2 This is a schematic diagram of the exploded structure of an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the exploded structure of an embodiment of the present invention from another perspective.

[0022] Figure 4 Schematic diagram of the exploded structure of the opening and closing device.

[0023] Figure 5 This is a schematic diagram of the decomposed structure of the opening and closing device from another perspective.

[0024] Figure 6 It is a schematic diagram of the assembly cross-sectional structure of the opening and closing device. DETAILED DESCRIPTION

[0025] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] See also Figures 1-6The opening and closing structure of the bag-mouth laminator includes an upper shell 1, a lower shell 2, and an opening and closing device. The opening and closing device includes a movable seat 3, a telescopic bag 4, and a base 5. The movable seat 3 and the base 5 are respectively connected to the upper shell 1 and the lower shell 2. The upper and lower ends of the telescopic bag 4 are respectively fixedly connected to the movable seat 3 and the base 5. A telescopic cavity 4.3 is formed between the telescopic bag 4 and the movable seat 3 and / or the base 5. A first bending portion 4.7, a second bending portion 4.8, and a third bending portion 4.9 are provided on the side of the telescopic bag 4. The first bending portion 4.7, the second bending portion 4.8, and the third bending portion 4.9 are connected to each other and fold together when the telescopic bag 4 is expanded and contracted.

[0028] This embodiment utilizes the interconnection between the first bend portion 4.7, the second bend portion 4.8, and the third bend portion 4.9, so that when the telescopic bladder 4 is extended or retracted, its side portions are folded only by relying on the first, second, and third bend portions, thereby effectively reducing the number of folding positions of the telescopic bladder 4 and reducing the risk of folding and damage of the telescopic bladder 4. This not only increases the service life of the telescopic bladder 4 and ensures its normal extension and retraction, but also makes the opening and closing between the upper shell 1 and the lower shell 2 more stable, reliable, and practical.

[0029] The first bending portion 4.7, the second bending portion 4.8 and the third bending portion 4.9 are folded together in an arc or angle shape toward the inside of the telescopic cavity 4.3.

[0030] In this embodiment, the first bending portion 4.7, the second bending portion 4.8 and the third bending portion 4.9 are in an arc-shaped transition with each other, thereby enabling the first, second and third bending portions to achieve arc-shaped fit when folded, thereby improving the stability of the folding fit.

[0031] The bellows 4 is annular, and the first bending portion 4.7, the second bending portion 4.8, and the third bending portion 4.9 are arranged on the side of the bellows 4 in sequence from top to bottom.

[0032] In this embodiment, the bellows 4 is integrally formed of a soft material, and its side portions are sequentially provided with a first bend 4.7, a second bend 4.8, and a third bend 4.9 from bottom to bottom. That is, when the bellows 4 is folded, it forms only two folding positions, thereby preventing the bellows 4 from being damaged at positions with a high risk of damage due to multiple folding positions.

[0033] The upper end of the telescopic bladder 4 is closed and provided with an upper sealing top 4.1. A first bent portion 4.7 is bent toward the base 5 and is located on the periphery of the upper sealing top 4.1. The telescopic bladder 4 is connected to the movable seat 3 via the upper sealing top 4.1. The lower end of the telescopic bladder 4 is open and formed with a lower connecting port 4.2 via a third bent portion 4.9 on the periphery. The telescopic bladder 4 is connected to the base 5 via the lower connecting port 4.2, forming a telescopic cavity 4.3 therebetween.

[0034] In this embodiment, since the upper end of the telescopic bladder 4 is integrally sealed with an upper sealing top 4.1, when the telescopic bladder 4 is assembled, the upper sealing top 4.1 at its upper end can form an effective sealing connection with the movable seat 3, thereby effectively reducing the gap between the telescopic bladder 4 and the movable seat 3 to prevent air from entering and exiting the telescopic cavity 4.3 at will, ensuring that the telescopic cavity 4.3 can work normally and improving the opening and closing stability between the upper shell 1 and the lower shell 2.

[0035] A fixing plate 7 is provided at the upper end of the telescopic bag 4. The fixing plate 7 is pressed on the upper sealing top 4.1 and fixed to the movable seat 3 by fixing parts, buckles, adhesion, or any combination of the above.

[0036] In this embodiment, the movable seat 3 is provided with a plurality of movable holes 3.1, the upper sealing top 4.1 is provided with a plurality of sealing through holes 4.3, and the fixed plate 7 is provided with a plurality of fixed through holes 7.1. The movable holes 3.1, the sealing through holes 4.3, and the fixed through holes 7.1 correspond to each other and are fixed to each other by fixing parts.

[0037] Several movable holes 3.1, several sealing through holes 4.3, and several fixed through holes 7.1 are arranged at intervals, and a common fixing member is used to fix the movable holes 3.1, the sealing through holes 4.3, and the fixed through holes 7.1, thereby achieving mutual fixation between the movable seat 3, the telescopic bag 4, and the fixed plate 7.

[0038] Specifically, the fixed plate 7 is located inside the telescopic bag 4, and its top surface is mutually dependent on the bottom surface of the upper sealing top 4.1, and the top surface of the upper sealing top 4.1 is mutually dependent on the bottom surface of the movable seat 3. In this way, effective sealing is achieved between the movable seat 3, the telescopic bag 4, and the fixed plate 7, preventing air from entering and exiting the telescopic cavity 4.3 through the position between the movable seat 3, the telescopic bag 4, and the fixed plate 7.

[0039] A movable seat limiting edge 3.2 is extended from the bottom surface of the movable seat 3. The movable seat limiting edge 3.2 is spaced apart and matched with the outer periphery of the fixed plate 7 to form a limiting groove. The first bent portion 4.7 is limited in the limiting groove. At the same time, the outer end surface of the first bent portion 4.7 and the movable seat limiting edge 3.2 rely on each other, and the inner end surface of the first bent portion 4.7 and the outer periphery of the fixed plate 7 rely on each other, which not only ensures the assembly stability between the movable seat 3, the telescopic bag 4, and the fixed plate 7, but also further improves the sealing between the movable seat 3, the telescopic bag 4, and the fixed plate 7.

[0040] A positioning ring 8 is provided on the telescopic bag 4, and a lower connecting flange 4.4 extends outside the third bending part 4.9. The positioning ring 8 is pressed on the lower connecting flange 4.4 and fixed to the base 5 by fixing parts, buckles, adhesion, or any combination of the above.

[0041] This embodiment uses a positioning ring 8 to press the lower connecting flange 4.4, and then uses fixing parts, buckles, adhesives, or any combination of the above to achieve the fixation between the telescopic bag 4 and the base 5. Not only is the structure simple and reasonable, but the assembly is also convenient and stable.

[0042] A positioning ring groove 5.2 is provided on the base 5, and the lower connecting flange 4.4 is positioned on the positioning ring groove 5.2 by pressing the positioning ring 8.

[0043] In this embodiment, the provision of the positioning ring groove 5.2 can effectively position the lower connecting flange 4.4, so as to avoid the problem of difficulty in assembling the telescopic bag 4 due to the inability to position the lower connecting flange 4.4 during assembly, thereby improving the convenience of assembling the telescopic bag 4. At the same time, after the lower connecting flange 4.4 is positioned on the positioning ring groove 5.2 by the positioning ring 8, an effective seal can be formed between the telescopic bag 4 and the base 5 at this time, preventing air from entering and exiting the telescopic cavity 4.3 through the position between the expansion positioning ring 8, the contraction bag 4, and the base 5.

[0044] Specifically, the positioning ring 8 is located on the periphery of the telescopic bag 4 and is provided with a plurality of positioning holes 8.1 and a positioning buckle part 8.2. The lower connecting flange 4.4 is provided with a plurality of flange through-holes 4.5 and a flange buckle part 4.6. The positioning ring groove 5.2 is provided with a plurality of ring groove through-holes 5.3. The base 5 is provided with a plurality of first base buckles 5.4. The positioning holes 8.1, the flange through-holes 4.5, and the ring groove through-holes 5.3 correspond to each other and are fixed to each other by fixing parts. The first base buckle 5.4 is buckled on the flange buckle part 4.6 and the positioning buckle part 8.2.

[0045] In this embodiment, a plurality of positioning holes 8.1, a plurality of positioning buckling portions 8.2, a plurality of flange through-holes 4.5, a plurality of flange buckling portions 4.6, a plurality of annular groove through-holes 5.3, and a plurality of first base buckles 5.4 are arranged at intervals, and a common fixing member is used to fix the positioning holes 8.1, the flange through-holes 4.5, and the annular groove through-holes 5.3. The first base buckle 5.4 is then buckled on the flange buckling portion 4.6 and the positioning buckling portion 8.2 at the same time, thereby effectively achieving mutual fixation between the positioning ring 8, the shrinkage capsule 4, and the base 5.

[0046] The fixing plate 7 is provided with a guide portion 7.2, and the base 5 is provided with a guide matching portion 5.5. The guide portion 7.2 and the guide matching portion 5.5 correspond to each other, and an elastic member 9 is provided therebetween. The elastic member 9 is elastically connected to the fixing plate 7 and the base 5 respectively.

[0047] In this embodiment, the movable seat 3 and the base 5 can achieve guiding cooperation through the guide part 7.2 and the guide cooperation part 5.5 when opening and closing. At the same time, the setting of the elastic member 9 can enable the movable seat 3 and the base 5 to move away from each other without the action of external force.

[0048] The guide portion 7.2 is provided on the bottom surface of the fixed plate 7 and protrudes toward the base 5. The top surface of the base 5 is provided with a base recessed hole 5.6. The guide mating portion 5.5 is provided on the base recessed hole 5.6 and protrudes toward the fixed plate 7. The elastic member 9 is a compression spring and is positioned and sleeved on the guide portion 7.2 and the guide mating portion 5.5.

[0049] In this embodiment, the elastic member 9 is positioned and sleeved on the guide portion 7.2 and the guide matching portion 5.5, and one end of the elastic member is also positioned on one of the fixed through holes 7.1, and the other end is also positioned on the base recessed hole 5.6, thereby ensuring that the elastic member 9 can be effectively assembled.

[0050] The top surface of the movable seat 3 and the upper shell 1 are fixed to each other by fixing parts, snaps, adhesion, or any combination of the above. The bottom surface of the movable seat 3 extends toward the base 5 with a limiting protrusion 3.4. When the movable seat 3 moves, the limiting protrusion 3.4 acts on the base 5 to limit the closing distance between the movable seat 3 and the base 5.

[0051] The bottom surface of the base 5 and the lower shell 2 are fixed to each other by fixing parts, snaps, adhesion, or any combination of the above.

[0052] Specifically, a movable seat buckle 3.3 is provided on the top surface of the movable seat 3, a second base buckle 5.7 is provided on the bottom surface of the base 5, an upper shell buckle portion 1.1 is provided on the upper shell 1, and a lower shell buckle buckle portion 2.1 is provided on the lower shell 2. The movable seat buckle 3.3 is buckled on the upper shell buckle portion 1.1, and the second base buckle 5.7 is buckled on the lower shell buckle buckle portion 2.1, thereby realizing the assembly between the movable seat 3 and the upper shell 1, and between the base 5 and the lower shell 2.

[0053] The upper shell 1 is further provided with an upper vacuum groove 1.2, an upper heating component 1.3 located on one side of the upper vacuum groove 1.2, and an upper sealing rubber ring 1.4 is provided on the periphery of the upper vacuum groove 1.2.

[0054] The lower shell 2 is further provided with a lower vacuum groove 2.2 and a lower heating component 2.3 located on one side of the lower vacuum groove 2.2. A lower sealing rubber ring 2.4 is provided on the periphery of the lower vacuum groove 2.2.

[0055] The base 5 is provided with a suction portion 5.1, which is connected to the telescopic chamber 4.3 and is connected to a suction device 6. The suction device 6 is provided on the upper shell 1 or the lower shell 2 and is connected to the lower vacuum groove 2.2 or the upper vacuum groove 1.2.

[0056] In this embodiment, the suction device 6 is provided on the lower shell 2 and is in communication with the suction portion 5.1 and the lower vacuum groove 2.2 to suck air from the telescopic cavity 4.3.

[0057] The above is a preferred embodiment of the present invention, which illustrates and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention, which is defined by the appended claims and their equivalents.

Claims

1. An opening and closing structure of a bag laminator, comprising an upper shell (1), a lower shell (2), and an opening and closing device, characterized in that: The opening and closing device comprises a movable seat (3), a telescopic bag (4), and a base (5), wherein the movable seat (3) and the base (5) are respectively connected to the upper shell (1) and the lower shell (2); the upper and lower ends of the telescopic bag (4) are respectively fixedly connected to the movable seat (3) and the base (5); a telescopic cavity (4.3) is formed between the telescopic bag (4) and the movable seat (3) and / or the base (5); a first bending portion (4.7), a second bending portion (4.8), and a third bending portion (4.9) are provided on the side of the telescopic bag (4); the first bending portion (4.7), the second bending portion (4.8), and the third bending portion (4.9) are connected to each other and fold and cooperate with each other when the telescopic bag (4) is extended or retracted.

2. The opening and closing structure of the bag laminator according to claim 1, characterized in that: The first bending portion (4.7), the second bending portion (4.8), and the third bending portion (4.9) are folded together in an arc or angled manner toward the inside of the telescopic cavity (4.3).

3. The opening and closing structure of the bag laminator according to claim 1, characterized in that: The telescopic bag (4) is annular, and the first bending portion (4.7), the second bending portion (4.8), and the third bending portion (4.9) are arranged in sequence from top to bottom on the side of the telescopic bag (4).

4. The opening and closing structure of the bag laminator according to claim 3, characterized in that: The upper end of the telescopic bag (4) is closed and provided with an upper sealing top (4.1); the first bent portion (4.7) is bent toward the base (5) at the periphery of the upper sealing top (4.1); the telescopic bag (4) is connected to the movable seat (3) through the upper sealing top (4.1); the lower end of the telescopic bag (4) is open and forms a lower connecting port (4.2) through the outer third bent portion (4.9); the telescopic bag (4) is connected to the base (5) through the lower connecting port (4.2), and the telescopic cavity (4.3) is formed between the two.

5. The opening and closing structure of the bag laminator according to claim 4, characterized in that: A fixing plate (7) is provided at the upper end of the telescopic bag (4), and the fixing plate (7) is pressed onto the upper sealing top (4.1) and fixed to the movable seat (3) by means of fixing parts, snaps, adhesive bonding, or any combination thereof.

6. The opening and closing structure of the bag laminator according to claim 5, characterized in that: A movable seat limiting edge (3.2) extends from the bottom surface of the movable seat (3), and the movable seat limiting edge (3.2) is spaced apart from the periphery of the fixed plate (7) to form a limiting groove, and the first bent portion (4.7) is limited in the limiting groove.

7. The opening and closing structure of the bag laminator according to claim 4, characterized in that: A positioning ring (8) is provided on the telescopic bag (4), a lower connecting flange (4.4) is extended from the periphery of the third bent portion (4.9), the positioning ring (8) is pressed onto the lower connecting flange (4.4), and is fixed to the base (5) by means of a fixing piece, a buckle, an adhesive, or any combination thereof.

8. The opening and closing structure of the bag laminator according to claim 7, characterized in that: A positioning ring groove (5.2) is provided on the base (5), and the lower connecting flange (4.4) is positioned on the positioning ring groove (5.2) by pressing the positioning ring (8).

9. The opening and closing structure of the bag laminator according to claim 5, characterized in that: A guide portion (7.2) is provided on the fixed plate (7), and a guide matching portion (5.5) is provided on the base (5); the guide portion (7.2) and the guide matching portion (5.5) correspond to each other, and an elastic member (9) is provided between the two; the elastic member (9) is elastically connected to the fixed plate (7) and the base (5), respectively.

10. The opening and closing structure of the bag laminator according to claim 1, characterized in that: The top surface of the movable seat (3) and the upper shell (1) are fixed to each other by means of fixing parts, snaps, adhesive bonding, or any combination thereof; the bottom surface of the movable seat (3) is provided with a limiting convex column (3.4) extending in the direction of the base (5); when the movable seat (3) is moving, the limiting convex column (3.4) acts on the base (5); The bottom surface of the base (5) and the lower shell (2) are fixed to each other by means of fixing parts, snaps, adhesive bonding, or any combination thereof; The upper shell (1) is further provided with an upper vacuum groove (1.2) and an upper heating component (1.3) located on one side of the upper vacuum groove (1.2); an upper sealing rubber ring (1.4) is provided on the periphery of the upper vacuum groove (1.2); The lower shell (2) is further provided with a lower vacuum groove (2.2) and a lower heating component (2.3) located on one side of the lower vacuum groove (2.2); a lower sealing rubber ring (2.4) is provided on the periphery of the lower vacuum groove (2.2); A suction portion (5.1) is provided on the base (5), the suction portion (5.1) is in communication with the telescopic cavity (4.3), and a suction device (6) is connected thereto, the suction device (6) is provided on the upper shell (1) or the lower shell (2), and is in communication with the lower vacuum groove (2.2) or the upper vacuum groove (1.2).

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