Sealing device

Abstract

The invention relates to the technical field of packaging, and discloses a sealing device which comprises a base, a sealing assembly and a sealing assembly. The rotating source is connected to the base; the cam is rotatably connected to the rotating source, and the rotating axis of the cam extends in the vertical direction; the first heat sealing piece and the second heat sealing piece are movably connected to the base, and a heating part of the first heat sealing piece and a heating part of the second heat sealing piece are oppositely arranged; and the transmission assembly is arranged on one side of the cam in the horizontal direction, the cam acts on the transmission assembly, and the transmission assembly is connected to the first heat sealing piece and / or the second heat sealing piece and can drive the first heat sealing piece and the second heat sealing piece to conduct opening and closing movement. According to the sealing device, the axis of the cam extends in the vertical direction, so that the cam is not prone to being influenced by self weight in the rotating process, the contact friction force between the cam and the transmission assembly can be reduced, and damage to the cam and the transmission assembly is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of packaging, and in particular to a sealing device. Background Art

[0002] Packaging bags have been widely used in the packaging field. For example, dust bags for air conditioner outdoor units and tea packaging are often packaged in plastic bags. The opening of the packaging bag needs to be heated by a mechanism to achieve closure.

[0003] In the related art, a partial sealing device includes a cam whose axis extends in a horizontal direction, a transmission assembly, a first heat-sealing part and a second heat-sealing part. The cam drives the first heat-sealing part and the second heat-sealing part to perform opening and closing movements through the transmission assembly, thereby sealing the packaging bag when the first heat-sealing part and the second heat-sealing part are closed. However, the sealing device configured in this way has the defect that the contact friction between the cam and the transmission assembly is large and is easily damaged. Summary of the invention

[0004] In view of this, the present invention provides a sealing device to solve the problem that the cam and the transmission assembly of the sealing device in the related art are easy to be damaged and the contact friction force is large.

[0005] The present invention provides a sealing device, comprising:

[0006] Pedestal;

[0007] A rotation source connected to the base;

[0008] A cam is rotatably connected to the rotation source, and a rotation axis of the cam extends in a vertical direction;

[0009] The first heat-sealing member and the second heat-sealing member are movably connected to the base, and the heating portion of the first heat-sealing member is arranged opposite to the heating portion of the second heat-sealing member;

[0010] The transmission assembly is arranged on one side of the cam in the horizontal direction. The cam acts on the transmission assembly. The transmission assembly is connected to the first heat sealing member and / or the second heat sealing member and can drive the first heat sealing member and the second heat sealing member to perform opening and closing movements.

[0011] Beneficial effect: During use of the sealing device of the embodiment of the present invention, the rotation source can drive the cam to rotate, and the transmission component can convert the rotational motion output by the cam into linear motion of the first heat-sealing member and / or the second heat-sealing member; when the first heat-sealing member and the second heat-sealing member are separated from each other, the plastic packaging bag can be placed between the first heat-sealing member and the second heat-sealing member; when the first heat-sealing member and the second heat-sealing member are closed to each other, the plastic packaging bag can be clamped, and the opening of the plastic packaging bag can be heated and melted by the heating part, thereby sealing the opening of the plastic packaging bag.

[0012] Therefore, the sealing device of the embodiment of the present invention can replace manual opening to seal plastic packaging bags, has high sealing efficiency, and can avoid defects such as poor sealing quality, easy air leakage and poor flatness caused by manual sealing, can reduce the labor intensity of the operator, and improve the sealing efficiency, aesthetics, flatness and sealing effect of the packaging bag. In addition, the sealing device of the embodiment of the present application can also meet the needs of sealing packaging bags of different sizes, has a wide range of applications, and is highly practical.

[0013] In addition, in the sealing device of the embodiment of the present application, the axis of the cam extends in the vertical direction. Therefore, the cam is not easily affected by its own weight during rotation, which can reduce the contact friction between the cam and the transmission assembly and avoid damage to the cam and the transmission assembly.

[0014] In an optional embodiment, the transmission assembly includes:

[0015] A hinged member, the middle portion of which is hinged to the base, and a first abutting portion is eccentrically provided on the hinged member;

[0016] a first connecting rod, a first end of which is hinged to the first end of the hinge member, and a second end of which is hinged to the first heat-sealing member;

[0017] A second connecting rod, a first end of which is hinged to the second end of the hinged member, and a second end of which is hinged to the second heat-sealing member;

[0018] The elastic member can drive the hinge to rotate in the direction of closing the first heat-sealing member and the second heat-sealing member. The cam is arranged on one side of the hinge and has a second abutting portion. The second abutting portion can drive the hinge to rotate in the direction of separating the first heat-sealing member and the second heat-sealing member when abutting against the first abutting portion.

[0019] Beneficial effect: Through such a configuration, the cam can rotate along the first rotation direction and make the second abutting portion abut against the first abutting portion, so that the hinge compresses the elastic member and rotates along the second rotation direction, the second rotation direction is opposite to the first rotation direction, and the two ends of the hinge can drive the first connecting rod and the second connecting rod to rotate in opposite directions, thereby making the first heat-sealing member and the second heat-sealing member slide and separate from each other, thereby allowing the opening of the plastic packaging bag to be placed between the first heat-sealing member and the second heat-sealing member.

[0020] When the cam rotates to separate the second abutting portion from the first abutting portion, the elastic member loses the force applied by the cam and can drive the hinge member to rotate along the first rotation direction through its own elastic restoring force, so that the first heat-sealing member and the second heat-sealing member are closed to each other under the drive of the first connecting rod and the second connecting rod, thereby heat-sealing the opening of the plastic packaging bag.

[0021] In addition, the transmission assembly of the embodiment of the present application can realize equal and opposite movements of the first heat-sealing member and the second heat-sealing member through a hinge and two connecting rods, and has a simple structure and high reliability.

[0022] In an optional embodiment, the cam includes a first sector-shaped portion, a connecting portion and a second sector-shaped portion, the radius of the first sector-shaped portion is greater than the radius of the second sector-shaped portion, the connecting portion is connected between the first sector-shaped portion and the second sector-shaped portion, and has an arc transition, when the first sector-shaped portion abuts against the first abutting portion, the first heat-sealing member and the second heat-sealing member are closed to each other, and when the second sector-shaped portion abuts against the first abutting portion, the first heat-sealing member and the second heat-sealing member are separated.

[0023] Beneficial effect: Through such arrangement, when the first sector portion abuts against the first abutting portion, the hinge can drive the first heat-sealing member and the second heat-sealing member to separate for a period of time through the transmission assembly, so as to put in or take out the packaging bag. As the cam continues to rotate under the action of the rotation source, the connecting section abuts against the first abutting portion, and the distance between the axis of the cam and the first abutting portion gradually decreases until the second sector portion abuts against the first abutting portion, and the first heat-sealing member fits against the second heat-sealing member for a period of time, thereby achieving the required heat shrinking time and completing a heat shrinking process.

[0024] In an optional embodiment, the elastic member includes:

[0025] The torsion spring is sleeved on the hinge, and the end portion is supported on the base.

[0026] In an optional embodiment, the base comprises:

[0027] The vertical plate, the first heat sealing component includes a first heat sealing part and a first sliding rod, the first sliding rod is slidably arranged on the vertical plate, the first heat sealing part is arranged on the first side of the vertical plate, and is connected to the first sliding rod; the second heat sealing component includes a second heat sealing part and a second sliding rod, the second sliding rod is slidably arranged on the vertical plate, the second heat sealing part is arranged on the first side of the vertical plate, and is connected to the second sliding rod, and the transmission assembly connects the first sliding rod and the second sliding rod on the second side of the vertical plate.

[0028] Beneficial effect: Through such an arrangement, the vertical plate can be used for the first slide rod and the second slide rod, the transmission assembly can drive the first slide rod and the second slide rod to move on the second side of the vertical plate, and the first heat sealing part and the second heat sealing part can be connected to the first slide rod and the second slide rod on the first side of the vertical plate, thereby avoiding interference between the movement of the transmission assembly and the first heat sealing part and the second heat sealing part.

[0029] In an optional embodiment, the first heat sealing member further includes a first connecting plate, the first sliding rods are arranged in pairs, the first connecting plate is connected between the two first sliding rods, and the transmission assembly is connected to the first connecting plate; and / or,

[0030] The second heat seal also includes:

[0031] The second connecting plate and the second sliding rod are arranged in pairs and are respectively arranged on both sides of the first heat sealing member, the second connecting plate is connected between the two second sliding rods, and the transmission assembly is connected to the second connecting plate;

[0032] The mounting plate is arranged on the first side of the vertical plate and connected between the two second sliding rods; the second heat sealing member is connected to the mounting plate.

[0033] Beneficial effect: By such arrangement, the stability of the first heat-sealing member and the second heat-sealing member during movement can be enhanced, and the first heat-sealing member and the second heat-sealing member can be prevented from deflecting during the expansion and contraction process.

[0034] In an optional embodiment, the sealing device further comprises:

[0035] The first substrate and the second substrate are arranged on the first side of the vertical plate and connected to the vertical plate. The first substrate and the second substrate are arranged at intervals in the vertical direction. The cam and the hinge are arranged between the first substrate and the second substrate, and the two ends of the rotating shaft of the cam and the hinge are respectively hinged to the first substrate and the second substrate.

[0036] Beneficial effects: The first substrate and the second substrate can support the rotating shaft of the hinge from the upper and lower sides respectively, and are used to resist the torsion spring, so that the rotation of the hinge can be more stable and will not interfere with the first heat sealing member and the second heat sealing member.

[0037] In an optional embodiment, the first substrate and / or the second substrate includes:

[0038] A plate body, wherein the plate body has a first end and a second end that are arranged opposite to each other, the first end is connected to the vertical plate, and a relief opening is arranged at one end of the plate body;

[0039] The first fixing plate is arranged in the avoidance opening and is detachably connected to the second end of the plate body. The rotating shaft of the hinged member is hinged to the first fixing plate.

[0040] Beneficial effect: Since the hinge needs to rotate continuously during operation, its shaft is easily worn. The first substrate and the second substrate of the present application are used to connect the first fixed plate cooperating with the hinge to the plate body detachably, so that the operator can replace parts easily.

[0041] In an optional embodiment, the base further includes:

[0042] The third substrate is arranged on the first side of the vertical plate and connected to the vertical plate. The rotation source is arranged on the third substrate and passes through the third substrate to connect the cam. The second end of the first substrate is detachably connected to the second fixed plate. One end of the cam's rotating shaft is connected to the rotation source, and the other end is hinged to the first substrate.

[0043] Beneficial effect: Since the rotating shaft of the cam needs to rotate continuously during use, it is prone to wear. The second fixing plate is detachably connected to the plate body, which makes it easy for the operator to replace the rotating shaft of the cam.

[0044] In an optional embodiment, a plurality of teeth protruding from the plate surface of the first heat-sealing portion are formed on the first heat-sealing portion, and a groove capable of meshing with the teeth is formed on the second heat-sealing portion.

[0045] Beneficial effect: The teeth and the grooves can cooperate with each other, thereby increasing the air tightness of the sealed packaging bag and avoiding the occurrence of undesirable phenomena such as wire drawing. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 A three-dimensional diagram of a sealing device according to an embodiment of the present invention;

[0048] Figure 2 A three-dimensional diagram of a sealing device according to an embodiment of the present invention at another angle;

[0049] Figure 3 A three-dimensional diagram of a sealing device according to an embodiment of the present invention at another angle;

[0050] Figure 4 A three-dimensional diagram of a sealing device according to an embodiment of the present invention at another angle;

[0051] Figure 5 A three-dimensional diagram of a sealing device according to an embodiment of the present invention at another angle;

[0052] Figure 6 A three-dimensional diagram of a connecting rod assembly and a second sliding rod of a sealing device according to an embodiment of the present invention;

[0053] Figure 7 A side view of a sealing device according to an embodiment of the present invention;

[0054] Figure 8 A top view of a sealing device according to an embodiment of the present invention;

[0055] Fig. 9 A rear view of a sealing device according to an embodiment of the present invention;

[0056] Fig.10A three-dimensional diagram of a first heat-sealing member and a second heat-sealing member of a sealing device according to an embodiment of the present invention;

[0057] Fig.11 A first substrate and a second substrate of a sealing device according to an embodiment of the present invention;

[0058] Fig.12 A side view of a rotation source, a third base and a cam of a sealing device according to an embodiment of the present invention;

[0059] Fig.13 It is a top view of a sealing device according to an embodiment of the present invention, in which the first sector portion of the cam abuts against the first abutting portion;

[0060] Fig.14 A top view of a sealing device according to an embodiment of the present invention, in which the cam is Fig.13 Based on the position in the middle, the first rotation direction is rotated by a certain angle;

[0061] Fig.15 It is a top view of a sealing device according to an embodiment of the present invention, in which the second sector-shaped portion of the cam abuts against the first abutting portion;

[0062] Fig.16 A top view of a sealing device according to an embodiment of the present invention, in which the cam is Fig.15 On the basis of the position in the middle, the first rotation direction is further rotated by a certain angle.

[0063] Description of reference numerals:

[0064] 1. base; 101. vertical plate; 102. first base plate; 1021. plate body; 1022. first fixing plate;

[0065] 1023, second fixing plate; 1024, avoidance opening; 103, second substrate; 104, third substrate;

[0066] 2. Cam;

[0067] 3. Rotation source;

[0068] 4. first heat sealing member; 401. first heat sealing portion; 4011. tooth portion; 4012. first heat conducting block; 4013. first mounting groove; 4014. first heating plate; 4021. first sliding rod; 4022. first connecting plate;

[0069] 5. second heat sealing member; 501. second heat sealing portion; 5011. groove portion; 5012. second heat conducting block; 5013. second mounting groove; 5014. second heating plate; 5021. second sliding rod; 5022. second connecting plate;

[0070] 5023, mounting plate;

[0071] 6. Transmission assembly; 601. hinge; 6011. first abutment portion; 602. first connecting rod; 603. second connecting rod; 604. elastic member. DETAILED DESCRIPTION

[0072] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0073] Combine the following Figures 1 to 16 , describing an embodiment of the present invention.

[0074] According to an embodiment of the present invention, a sealing device is provided, comprising a base 1, a cam 2, a rotation source 3, a first heat sealing member 4, a second heat sealing member 5 and a transmission assembly 6.

[0075] The rotation source 3 is connected to the base 1. The cam 2 is rotatably connected to the rotation source 3, and the rotation axis of the cam 2 extends in the vertical direction. The first heat seal 4 and the second heat seal 5 are movably connected to the base 1, and the heating part of the first heat seal 4 is arranged opposite to the heating part of the second heat seal 5. The transmission assembly 6 is arranged on one side of the cam 2 in the horizontal direction. The cam 2 acts on the transmission assembly 6, and the transmission assembly 6 is connected to the first heat seal 4 and / or the second heat seal 5, and can drive the first heat seal 4 and the second heat seal 5 to perform opening and closing movements.

[0076] During use of the sealing device of the embodiment of the present invention, the rotation source 3 can drive the cam 2 to rotate, and the transmission assembly 6 can convert the rotational motion output by the cam 2 into linear motion of the first heat-sealing member 4 and / or the second heat-sealing member 5. When the first heat-sealing member 4 and the second heat-sealing member 5 are separated from each other, the plastic packaging bag can be placed between the first heat-sealing member 4 and the second heat-sealing member 5. When the first heat-sealing member 4 and the second heat-sealing member 5 are closed to each other, the plastic packaging bag can be clamped, and the opening of the plastic packaging bag can be heated and melted by the heating part, thereby sealing the opening of the plastic packaging bag.

[0077] Therefore, the sealing device of the embodiment of the present invention can replace manual opening to seal plastic packaging bags, has high sealing efficiency, and can avoid defects such as poor sealing quality, easy air leakage and poor flatness caused by manual sealing, can reduce the labor intensity of the operator, and improve the sealing efficiency, aesthetics, flatness and sealing effect of the packaging bag. In addition, the sealing device of the embodiment of the present application can also meet the needs of sealing packaging bags of different sizes, has a wide range of applications, and is highly practical.

[0078] In addition, in the sealing device of the embodiment of the present application, the axis of the cam 2 extends in the vertical direction. Therefore, the cam 2 is not easily affected by its own weight during rotation, which can reduce the contact friction between the cam 2 and the transmission assembly 6 and avoid damage to the cam 2 and the transmission assembly 6.

[0079] In the prior art, the cam and the transmission assembly contact each other in the vertical direction. Therefore, in the process of the cam driving the transmission assembly, the cam's own gravity will also generate additional pressure on the contact position between the cam and the transmission assembly, resulting in a large contact friction between the cam and the transmission assembly in the prior art, which is more prone to damage.

[0080] In the embodiment of the present application, the cam 2 and the transmission assembly 6 are in contact with each other in the horizontal direction, thereby preventing the gravity of the cam located on the upper side in the height direction from acting on the transmission assembly located on the lower side, thereby avoiding friction and noise caused by gravity and helping to extend the service life of the cam 2 and the transmission assembly 6.

[0081] It should be noted that in the application embodiments, "vertical" is a concept representing the vertical direction, which refers to the direction perpendicular or nearly perpendicular to the horizontal plane, including the state where the angle formed by a straight line and the horizontal plane, or a plane and the horizontal plane is 80° to 100°.

[0082] In a preferred embodiment, the angle between the rotating shaft of the cam 2 and the horizontal plane is 90 degrees, which can minimize the contact friction between the cam 2 and the transmission assembly 6 and avoid damage to the cam 2 and the transmission assembly 6.

[0083] The rotation source 3 may be a device capable of outputting rotation, such as an electric motor, an engine, a hydraulic motor, or a combination of one of them and a reducer.

[0084] In one embodiment, Figure 1 , Figure 3 and Figure 4 As shown, the transmission assembly 6 includes a hinge 601 , a first connecting rod 602 , a second connecting rod 603 and an elastic member 604 .

[0085] The middle part of the hinge 601 is hinged to the base 1, and the hinge 601 is eccentrically provided with a first abutment portion 6011. The first end of the first connecting rod 602 is hinged to the first end of the hinge 601. The second end of the first connecting rod 602 is hinged to the first heat-sealing member 4. The first end of the second connecting rod 603 is hinged to the second end of the abutment portion, and the second end of the second connecting rod 603 is hinged to the second heat-sealing member 502. The elastic member 604 can drive the hinge 601 to rotate in the direction of closing the first heat-sealing member 4 and the second heat-sealing member 5. The cam 2 is provided at one side of the hinge 601 and has a second abutment portion. The second abutment portion can drive the hinge 601 to rotate in the direction of separating the first heat-sealing member 4 and the second heat-sealing member 5 when abutting against the first abutment portion 6011.

[0086] By setting it up like this, Fig.13 and Fig.14 As shown, the cam 2 can rotate along a first rotation direction and make the second abutting portion abut against the first abutting portion 6011, so that the hinge 601 compresses the elastic member 604 and rotates along a second rotation direction, and the second rotation direction is opposite to the first rotation direction. The two ends of the hinge 601 can drive the first connecting rod 602 and the second connecting rod 603 to rotate in opposite directions, thereby making the first heat-sealing member 4 and the second heat-sealing member 5 slide and separate from each other, thereby allowing the opening of the plastic packaging bag to be placed between the first heat-sealing member 4 and the second heat-sealing member 5.

[0087] like Fig.15 As shown, when the cam 2 rotates to separate the second abutment portion from the first abutment portion 6011, the elastic member 604 loses the force applied by the cam 2 and can drive the hinge 601 to rotate along the first rotation direction through its own elastic restoring force, so that the first heat-sealing member 4 and the second heat-sealing member 5 are closed to each other under the drive of the first connecting rod 602 and the second connecting rod 603, thereby heat-sealing the opening of the plastic packaging bag, and repeating this process.

[0088] In addition, the transmission assembly 6 of the embodiment of the present application can realize equal and opposite movements of the first heat-sealing member 4 and the second heat-sealing member 5 through a hinge 601 and two connecting rods, and has a simple structure and high reliability.

[0089] As a convertible implementation, in an embodiment not shown in the drawings, the transmission assembly 6 only includes a hinge 601 and a connecting rod, and the connecting rod is connected to the first heat-sealing member 4 or the second heat-sealing member 5.

[0090] In one embodiment, the cam 2 includes a first fan-shaped portion, a connecting portion and a second fan-shaped portion. The radius of the first fan-shaped portion is greater than the radius of the second fan-shaped portion. The connecting portion is connected between the first fan-shaped portion and the second fan-shaped portion and has an arc transition. When the first fan-shaped portion abuts against the first abutting portion 6011, the first heat sealing member 4 and the second heat sealing member 5 are closed to each other. When the second fan-shaped portion abuts against the first abutting portion 6011, the first heat sealing member 4 and the second heat sealing member 5 are separated.

[0091] By such arrangement, when the first sector portion abuts against the first abutting portion 6011, the hinge 601 can drive the first heat sealing member 4 and the second heat sealing member 5 to separate for a period of time through the transmission assembly 6, so as to put in or take out the packaging bag. As the cam 2 continues to rotate under the action of the rotation source 3, the connecting section abuts against the first abutting portion 6011, and the distance between the axis of the cam 2 and the first abutting portion 6011 gradually decreases until the second sector portion abuts against the first abutting portion 6011, and the first heat sealing member 4 fits against the second heat sealing member 5 for a period of time, thereby achieving the required heat shrinking time and completing a heat shrinking process.

[0092] As another alternative embodiment, in an embodiment not shown in the drawings, the elastic member 604 can apply a force to the hinge member 601 to rotate in the first rotation direction. At this time, the cam 2 can rotate in the second rotation direction and make the second abutting portion abut against the first abutting portion 6011, so that the hinge member 601 compresses the elastic member 604 and rotates in the first rotation direction, and the two ends of the hinge member 601 can drive the first connecting rod 602 and the second connecting rod 603 to rotate in opposite directions, thereby making the first heat sealing member 4 and the second heat sealing member 5 slide and close to each other, so as to heat-seal the opening of the plastic packaging bag.

[0093] When the cam 2 rotates to separate the second abutment portion from the first abutment portion 6011, the elastic member 604 loses the force applied by the cam 2 and can drive the hinge 601 to rotate along the second rotation direction through its own elastic restoring force, so that the first heat-sealing member 4 and the second heat-sealing member 5 are separated from each other under the drive of the first connecting rod 602 and the second connecting rod 603, thereby allowing the heat-sealed plastic packaging bag to be taken out from between the first heat-sealing member 4 and the second heat-sealing member 5, and so on.

[0094] The sealing device of the embodiment of the present application can be optionally used to seal packaging products such as plastic packaging bags and plastic films.

[0095] In one embodiment, the elastic member 604 comprises a torsion spring which is sleeved on the hinge member 601 and has an end supported on the base 1 .

[0096] In one embodiment, torsion springs are respectively sleeved on both ends of the rotating shaft of the hinge 601. Through such an arrangement, the rotation angle of the entire rotating shaft of the hinge 601 can be made consistent, and the operation is more stable.

[0097] As a convertible implementation, in an embodiment not shown in the drawings, the torsion spring may also be provided at only one end of the rotating shaft of the hinge 601 .

[0098] In one embodiment, the base 1 includes a vertical plate 101. Figure 8 and Fig.10 As shown, the first heat sealing member 4 includes a first heat sealing portion 401 and a first slide rod 4021. The first slide rod 4021 is slidably disposed on the vertical plate 101, the first heat sealing portion 401 is disposed on the first side of the vertical plate 101, and is connected to the first slide rod 4021; the second heat sealing member 5 includes a second heat sealing portion 501 and a second slide rod 5021, the second slide rod 5021 is slidably disposed on the vertical plate 101, the second heat sealing portion 501 is disposed on the first side of the vertical plate 101, and is connected to the second slide rod 5021, and the transmission assembly 6 is connected to the first slide rod 4021 and the second slide rod 5021 on the second side of the vertical plate 101.

[0099] Through such an arrangement, the vertical plate 101 can be used for the first slide rod 4021 and the second slide rod 5021, the transmission component 6 can drive the first slide rod 4021 and the second slide rod 5021 to move on the second side of the vertical plate 101, and the first heat sealing part 401 and the second heat sealing part 501 can be connected to the first slide rod 4021 and the second slide rod 5021 on the first side of the vertical plate 101, thereby avoiding interference between the movement of the transmission component 6 and the first heat sealing part 401 and the second heat sealing part 501.

[0100] In one embodiment, the first heat sealing member 402 further includes a first connecting plate 4022 , the first sliding rods 4021 are arranged in pairs, the first connecting plate 4022 is connected between two first sliding rods 4021 , and the transmission assembly 6 is connected to the first connecting plate 4022 .

[0101] like Figure 6 As shown, the second heat sealing member 502 further includes a second connecting plate 5022 and a mounting plate 5023. The second sliding rods 5021 are arranged in pairs and are respectively arranged on both sides of the first heat sealing member 4, the second connecting plate 5022 is connected between the two second sliding rods 5021, and the transmission assembly 6 is connected to the second connecting plate 5022. The mounting plate 5023 is arranged on the first side of the vertical plate 101 and connected between the two second sliding rods 5021, and the second heat sealing member 5 is connected to the mounting plate 5023.

[0102] By such arrangement, the stability of the first heat-sealing member 4 and the second heat-sealing member 5 during the movement can be enhanced, and the first heat-sealing member 4 and the second heat-sealing member 5 can be prevented from deflecting during the extension and retraction process.

[0103] In one embodiment, Fig.10 As shown, the first heat sealing part 401 includes a first heat conducting block 4012 , a first mounting groove 4013 and a first heating plate 4014 . The first mounting groove 4013 is formed on the first heat conducting block 4012 , and the first heating plate 4014 is disposed in the first mounting groove 4013 .

[0104] The second heat sealing part 501 includes a second heat conducting block 5012, a second mounting groove 5013 and a second heating plate 5014. The second mounting groove 5013 is formed on the second heat conducting block 5012, and the second heating plate 5014 is disposed in the second mounting groove 5013. The heat released by the first heating plate 4014 and the second heating plate 5014 can be transferred to the heat conducting block and the second heat conducting block 5012 respectively, so that the first heat conducting block 4012 and the second heat conducting block 5012 can heat and melt the opening of the plastic packaging bag when they are closed to each other, thereby sealing the opening of the plastic packaging bag.

[0105] As a convertible embodiment, in an embodiment not shown in the accompanying drawings, the elastic member 604 is not provided in the transmission assembly 6, and the cam 2 can drive the second connecting plate 5022 to move away from the vertical plate 101 when the second abutting portion abuts against the second connecting plate 5022, thereby prompting the first heat sealing member 4 and the second heat sealing member 5 to close.

[0106] In one embodiment, a first through hole and a second through hole are respectively provided at positions corresponding to the first sliding rod 4021 and the second sliding rod 5021 on the vertical plate 101, a first sleeve is provided in the first through hole, a second sleeve is provided in the second through hole, the first sliding rod 4021 is inserted into the first sleeve, and the second sliding rod 5021 is inserted into the second sleeve.

[0107] The first sleeve and the second sleeve can respectively reduce the friction generated by the first sliding rod 4021 and the second sliding rod 5021 during the movement, and constrain the movement directions of the first sliding rod 4021 and the second sliding rod 5021 .

[0108] In one embodiment, the rotation axis of the hinge 601 extends in the vertical direction, and the first connecting rod 602 and the second connecting rod 603 extend in the horizontal direction.

[0109] In one embodiment, Figure 8 As shown, the first substrate 102 and the second substrate 103 are arranged on the first side of the vertical plate 101 and connected to the vertical plate 101. The first substrate 102 and the second substrate 103 are arranged at intervals in the vertical direction, the cam 2 and the hinge 601 are arranged between the first substrate 102 and the second substrate 103, and the two ends of the rotating shaft of the cam 2 and the hinge 601 are hinged to the first substrate 102 and the second substrate 103 respectively.

[0110] The first substrate 102 and the second substrate 103 can support the rotating shaft of the hinge 601 from the upper and lower sides respectively, and are used to resist the torsion spring, so that the rotation of the hinge 601 can be more stable and will not interfere with the first heat sealing member 4 and the second heat sealing member 5.

[0111] In one embodiment, the planes where the first substrate 102 and the second substrate 103 are located are parallel to a horizontal plane.

[0112] In one embodiment, Fig.11 As shown, the first substrate 102 and / or the second substrate 103 includes a plate body 1021 and a first fixing plate 1022. The plate body 1021 has a first end and a second end that are arranged opposite to each other, the first end is connected to the vertical plate 101, and a clearance opening 1024 is provided at one end of the plate body 1021. The first fixing plate 1022 is arranged in the clearance opening 1024 and is detachably connected to the second end of the plate body 1021, and the rotating shaft of the hinge 601 is hinged to the first fixing plate 1022.

[0113] Since the hinge 601 needs to rotate continuously during operation, its shaft is easily worn. In the present application, the first substrate 102 and the second substrate 103 are used to connect the first fixed plate 1022 that cooperates with the hinge 601 to the plate body 1021 detachably, so that the operator can replace parts.

[0114] In one embodiment, a mounting hole is provided on the first fixing plate 1022, a bearing is provided in the mounting hole, the rotating shaft of the hinge 601 is passed through the bearing, and the first fixing plate 1022 is detachably connected to the plate body 1021, so that the operator can easily replace the rotating shaft.

[0115] As a convertible implementation, in an embodiment not shown in the drawings, the first substrate 102 and the second substrate 103 may also be an integrated structure.

[0116] In one embodiment, the base 1 further includes a third substrate 104. The third substrate 104 is disposed on a first side of the vertical plate 101 and connected to the vertical plate 101. The rotation source 3 is disposed on the third substrate 104 and is connected to the cam 2 through the third substrate. A second fixing plate 1023 is detachably connected to the second end of the first substrate 102. One end of the rotating shaft of the cam 2 is connected to the rotation source 3, and the other end is hinged to the first substrate 102.

[0117] Since the rotating shaft of the cam 2 needs to rotate continuously during use, it is prone to wear. The second fixing plate 1023 is detachably connected to the plate body 1021, which can facilitate the operator to replace the rotating shaft of the cam 2.

[0118] In one embodiment, a connecting plate is connected between the first substrate 102, the second substrate 103 and the third substrate 104, and the connecting plate can support the first substrate 102, the second substrate 103 and the third substrate 104, thereby helping to improve the structural strength of the base 1 and prevent any of the first substrate 102, the second substrate 103 and the third substrate 104 from tilting.

[0119] In one embodiment, a reinforcing rib is connected between the upper surface of the first substrate 102 and the vertical plate 101 , and the reinforcing rib can further enhance the structural strength of the base 1 .

[0120] In one embodiment, Fig.12 As shown, the sealing device also includes a coupling, the power output end of the rotation source 3 is connected to the coupling, and the coupling is connected to the cam 2.

[0121] In one embodiment, a plurality of teeth 4011 protruding from the plate surface of the first heat sealing portion 401 are formed on the first heat sealing portion 401 , and a groove 5011 capable of meshing with the teeth 4011 is formed on the second heat sealing portion 501 .

[0122] The tooth portion 4011 and the groove portion 5011 can cooperate with each other, thereby increasing the air tightness of the packaging bag after sealing and avoiding the occurrence of undesirable phenomena such as wire drawing.

[0123] For example, in one embodiment, the tooth portion 4011 is a rectangular tooth extending along the length direction of the first heat sealing portion 401, and there are multiple rectangular teeth, which are sequentially arranged along the width direction of the first heat sealing portion 401. The groove portion 5011 is a rectangular groove capable of correspondingly accommodating the rectangular teeth.

[0124] Next, the use process of the sealing device according to the embodiment of the present invention is described:

[0125] First, the first heating plate 4014 and the second heating plate 5014 adjust the temperature of the first heat conductive block 4012 and the second heat conductive block 5012 to the temperature at which the plastic melts, and the rotating source 3 is electrically rotated to drive the cam 2 to rotate along the first rotation direction. When the second fan-shaped portion of the cam 2 abuts against the first abutting portion 6011 of the hinge 601, the hinge 601 compresses the elastic member 604 and rotates along the second rotation direction, driving the first connecting rod 602 and the second connecting rod 603, so that the first heat sealing member 4 and the second heat sealing member 5 are separated from each other.

[0126] When the plastic bag is put into the gap between the first heat-sealing member 4 and the second heat-sealing member 5, the rotation source 3 continues to drive the cam 2 to rotate, so that the first sector portion of the cam 2 abuts against the second abutting portion of the hinge 601, and the elastic member 604 loses the force applied by the cam 2, and can drive the hinge 601 to rotate along the first rotation direction through its own elastic restoring force, so that the first heat-sealing member 4 and the second heat-sealing member 5 are closed to each other under the drive of the first connecting rod 602 and the second connecting rod 603, and continue for a period of time, thereby achieving the required heat shrinking time and completing a heat shrinking process.

[0127] In summary, the sealing device of the embodiment of the present application can overcome the defect in the related art that the cam 2 is not easily affected by its own weight during rotation, and can reduce the contact friction between the cam 2 and the transmission assembly 6 to avoid damage to the cam 2 and the transmission assembly 6.

[0128] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope of protection claimed in this application.

Claims

1. A sealing device, characterized in that: include: Base (1); A rotation source (3) connected to the base (1); A cam (2) rotatably connected to the rotation source (3), wherein the rotation axis of the cam (2) extends in a vertical direction; A first heat-sealing member (4) and a second heat-sealing member (5) are movably connected to the base (1), and a heating portion of the first heat-sealing member (4) and a heating portion of the second heat-sealing member (5) are arranged opposite to each other; A transmission assembly (6) is arranged on one side of the cam (2) in the horizontal direction, the cam (2) acts on the transmission assembly (6), and the transmission assembly (6) is connected to the first heat-sealing member (4) and / or the second heat-sealing member (5), and can drive the first heat-sealing member (4) and the second heat-sealing member (5) to perform opening and closing movements.

2. The sealing device according to claim 1, characterized in that: The transmission assembly (6) comprises: A hinged member (601), the middle portion of which is hinged to the base (1), and a first abutting portion (6011) is eccentrically provided on the hinged member (601); A first connecting rod (602), a first end of which is hinged to the first end of the hinged member (601), and a second end of which is hinged to the first heat-sealing member (4); A second connecting rod (603), a first end of which is hinged to the second end of the hinged member (601), and a second end of which is hinged to the second heat-sealing member (5); The elastic member (604) is capable of driving the hinge (601) to rotate in the direction of closing the first heat-sealing member (4) and the second heat-sealing member (5); the cam (2) is arranged on one side of the hinge (601) and has a second abutting portion. The second abutting portion is capable of driving the hinge (601) to rotate in the direction of separating the first heat-sealing member (4) and the second heat-sealing member (5) when abutting against the first abutting portion (6011).

3. The sealing device according to claim 2, characterized in that: The cam (2) includes a first fan-shaped portion, a connecting portion and a second fan-shaped portion. The radius of the first fan-shaped portion is greater than the radius of the second fan-shaped portion. The connecting portion is connected between the first fan-shaped portion and the second fan-shaped portion and has an arc transition. When the first fan-shaped portion abuts against the first abutting portion (6011), the first heat-sealing member (4) and the second heat-sealing member (5) are closed to each other. When the second fan-shaped portion abuts against the first abutting portion (6011), the first heat-sealing member (4) and the second heat-sealing member (5) are separated.

4. The sealing device according to claim 2, characterized in that: The elastic member (604) comprises: A torsion spring is sleeved on the hinge (601), and an end portion is supported on the base (1).

5. The sealing device according to any one of claims 2 to 4, characterized in that: The base (1) comprises: A vertical plate (101), the first heat sealing member (4) includes a first heat sealing portion (401) and a first sliding rod (4021), the first sliding rod (4021) is slidably arranged on the vertical plate (101), the first heat sealing portion (401) is arranged on the first side of the vertical plate (101), and is connected to the first sliding rod (4021); the second heat sealing member (5) includes a second heat sealing portion (501) and a second sliding rod (5021), the second sliding rod (5021) is slidably arranged on the vertical plate (101), the second heat sealing portion (501) is arranged on the first side of the vertical plate (101), and is connected to the second sliding rod (5021), and the transmission assembly (6) connects the first sliding rod (4021) and the second sliding rod (5021) on the second side of the vertical plate (101).

6. The sealing device according to claim 5, characterized in that: The first heat-sealing member (402) further comprises a first connecting plate (4022), the first sliding rods (4021) are arranged in pairs, the first connecting plate (4022) is connected between two of the first sliding rods (4021), and the transmission assembly (6) is connected to the first connecting plate (4022); and / or, The second heat seal member (502) further comprises: A second connecting plate (5022), the second sliding rods (5021) are arranged in pairs and are respectively arranged on both sides of the first heat sealing member (4), the second connecting plate (5022) is connected between the two second sliding rods (5021), and the transmission assembly (6) is connected to the second connecting plate (5022); The mounting plate (5023) is arranged on the first side of the vertical plate (101) and connected between the two second sliding rods (5021); the second heat sealing member (5) is connected to the mounting plate (5023).

7. The sealing device according to claim 5, characterized in that: Also includes: The first substrate (102) and the second substrate (103) are arranged on the first side of the vertical plate (101) and connected to the vertical plate (101); the first substrate (102) and the second substrate (103) are arranged at intervals in the vertical direction; the cam (2) and the hinge (601) are arranged between the first substrate (102) and the second substrate (103); and the two ends of the rotating shaft of the cam (2) and the hinge (601) are respectively hinged to the first substrate (102) and the second substrate (103).

8. The sealing device according to claim 7, characterized in that: The first substrate (102) and / or the second substrate (103) comprises: A plate body (1021), the plate body (1021) having a first end and a second end arranged opposite to each other, the first end being connected to the vertical plate (101), and a relief opening (1024) being provided at one end of the plate body (1021); The first fixed plate (1022) is disposed in the avoidance opening (1024) and is detachably connected to the second end of the plate body (1021); the rotating shaft of the hinge (601) is hinged to the first fixed plate (1022).

9. The sealing device according to claim 7, characterized in that: The base (1) further comprises: The third substrate (104) is arranged on the first side of the vertical plate (101) and is connected to the vertical plate (101); the rotation source (3) is arranged on the third substrate (104) and is connected to the cam (2) through the third substrate (104); a second fixing plate (1023) is detachably connected to the second end of the first substrate (102); one end of the rotating shaft of the cam (2) is connected to the rotation source (3), and the other end is hinged to the first substrate (102).

10. The sealing device according to claim 5, characterized in that: The first heat sealing portion (401) is formed with a plurality of teeth (4011) protruding from the plate surface of the first heat sealing portion (401), and the second heat sealing portion (501) is formed with a groove (5011) capable of meshing with the teeth (4011).

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