Sealing device

Abstract

When the sealing device is used, a bag body penetrates through a through hole in the middle of a base, the moving direction of a clamping mechanism serves as the transverse direction, under the action of the clamping mechanism, the bag body can be pressed tightly in the transverse direction, the direction of a connecting line of the corresponding positions of two opposite closing-up pieces serves as the longitudinal direction, under the action of a closing-up mechanism, a driving assembly can drive a closing-up assembly to close up the bag body; specifically, the two sets of oppositely-arranged folding pieces can rotate in the opposite directions so that the bag body can be transversely folded and clamped, then the sealing portion of the bag body can be folded into one bundle through the cooperation of the clamping mechanism, and due to the fact that the bag body is clamped by the clamping mechanism and the folding mechanism in the mode that the two parts move relatively to approach, the bag body can be folded into one bundle. Therefore, the final bundling position of the bag body is basically located in the center of the through hole, after the bag body is bundled, the sealing portion of the bag body is subjected to hot pressing sealing through the hot melting mechanism, and sealing of the bag body can be completed. In general, by using the sealing device, the sealing effect of the bag body can be better.

Description

Technical Field

[0001] The utility model relates to the technical field of bag sealing equipment, in particular to a sealing device. Background Art

[0002] With the continuous development of science and technology, people's living standards have been significantly improved. In daily life, we often see or use some products that contain the crystallization of science and technology, which has brought great convenience to our life and work. Take the bag sealing device as an example. Before the appearance of the sealing device, we needed to manually tie the bag or wrap it with ropes, which was not only time-consuming and laborious, but the odor in the bag would also affect the people who were sealing and packing. Therefore, the appearance of the sealing device has further improved our quality of life.

[0003] Existing bag sealing devices usually include a first rod body that is longitudinally arranged and can move laterally, and a second rod body that is transversely arranged and can move longitudinally. For example, the bag body is put on a trash can with a rectangular opening. Under the action of the first rod body and the second rod body, the bag body will eventually be gathered at a corner of the rectangular opening. Although it can also be gathered into a bundle, the deformation of various parts of the bag body is inconsistent, which can easily lead to leakage during sealing. Some bag sealing devices will first press the sealing part of the bag body into a thin sheet, and then use a hot press sealing machine to heat-melt and seal the thin sheet part. However, since the bag body at the hot press part is thin, the bag body is easily damaged during the hot press process. In general, the sealing effect of sealing the bag body by the above methods is not good enough. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In order to solve the above problems, the utility model provides a sealing device with better sealing effect.

[0006] (II) Technical solution

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A sealing device, used for sealing a bag, comprising:

[0009] A base, wherein a through hole is provided in the middle of the base so that the bag body can pass through the base;

[0010] A clamping mechanism, the clamping mechanism is arranged on the base and is used to clamp the bag body;

[0011] Closing mechanism, the closing mechanism includes a driving component and a closing component, the driving component is fixedly connected to the clamping mechanism, the closing component is composed of two sets of oppositely arranged closing members, each set of the closing members includes at least one of the closing members, the closing member is rotatably connected to the clamping mechanism and drivingly connected to the driving component, so that the driving component can drive the closing member to rotate around the clamping mechanism, the plane formed when the closing member rotates is parallel to the plane where the moving direction of the clamping mechanism is located, so that the angle formed by the two opposite closing members facing the bag body can gradually increase to accommodate the bag body, so that the angle formed by the two opposite closing members facing the bag body can gradually decrease to close the bag body;

[0012] Heat fusion mechanism, the heat fusion mechanism is arranged on the clamping surface of the clamping mechanism and is used for heat-fusing and sealing the bags gathered into a bundle.

[0013] Preferably, the through hole is vertically arranged and its cross-section is basically rectangular, and the clamping mechanism includes:

[0014] Guide member, the guide member is fixedly arranged on the base and corresponds to the through hole, and the extending direction of the guide member is parallel to the length direction of the through hole;

[0015] First clamping member, the first clamping member is slidably connected to the guide member;

[0016] Second clamping member, the second clamping member is slidably connected to the guide member, and the heat fusion mechanism is arranged on the side of the second clamping member close to the first clamping member;

[0017] Moving component, the moving component is drivingly connected to the first clamping member and the second clamping member, and can move the first clamping member and the second clamping member towards each other to clamp the bag body.

[0018] Preferably, a rack is arranged on the base, the extending direction of the rack is parallel to the extending direction of the guide member, and the moving component includes:

[0019] First motor, the first motor is arranged on the first clamping member, the first motor is drivingly connected to the first shaft, and a first gear meshing with the rack is fixedly connected to the first shaft;

[0020] Second motor, the second motor is arranged on the second clamping member, the second motor is drivingly connected to the second shaft, and a second gear meshing with the rack is fixedly connected to the second shaft;

[0021] Starting the first motor alone can cause the first clamping member to move alone along the extension direction of the guiding member; starting the second motor alone can cause the second clamping member to move alone along the extension direction of the guiding member; starting the first motor and the second motor simultaneously can cause the first clamping member and the second clamping member to move towards each other along the extension direction of the guiding member, so that the first clamping member and the second clamping member approach each other and clamp the bag body or move away from each other and loosen the bag body; starting the first motor and the second motor simultaneously can cause the first clamping member and the second clamping member to move in the same direction along the extension direction of the guiding member to adjust the position of the bag body and tear the bag body.

[0022] Preferably, the folding member is rotatably connected to the first clamping member, and the angle formed by two opposite folding members facing the bag body is the folding angle. The driving assembly includes:

[0023] Two groups of limiting blocks are oppositely arranged on the first clamping member, and the limiting blocks and the folding members are arranged in one-to-one correspondence. Two opposite limiting blocks are located outside two opposite folding members to limit the rotation range of the folding members, so that when the folding member abuts against the corresponding limiting block, the folding angle is the maximum value;

[0024] Two groups of wedge-shaped blocks are oppositely arranged on the second clamping member, and the wedge-shaped blocks and the folding members are arranged in one-to-one correspondence. There is a gap between two opposite wedge-shaped blocks and slopes are provided on the opposite surfaces. When the folding angle is the maximum value, the opening formed by the sides of two opposite slopes close to the bag body is larger than the opening formed by the sides away from the bag body and larger than the opening formed by the sides of two opposite folding members close to the bag body, so that the folding member can abut against the slope, and the folding angle gradually becomes smaller as the first clamping member and the second clamping member approach each other;

[0025] Two groups of torsion springs are arranged in one-to-one correspondence with the folding members. The torsion springs are arranged at the rotatable connection part of the folding members and the first clamping member, and the folding members abut against the corresponding limiting blocks under the action of the torsion springs, so that the folding angle is the maximum value in the natural state.

[0026] Preferably, the length of the rotation radius of the closing member is greater than the length of the wedge-shaped block in the moving direction, so that when the first clamping member abuts against the heat fusion mechanism, the closing member can pass through the opening formed on the side of the two opposite slopes away from the bag body; the opening formed on the side of the two opposite slopes away from the bag body is smaller than the distance between the rotation centers of the two opposite closing members, so that when the first clamping member abuts against the heat fusion mechanism, the value of the closing angle is negative; when the closing angle is equal to zero, there is a gap between the first clamping member and the heat fusion mechanism.

[0027] Preferably, each group of the closing members includes two closing members, and the two closing members in the same group are respectively rotatably connected to the top and bottom of the first clamping member, so as to increase the range of the part of the bag body to be closed.

[0028] Preferably, it further includes:

[0029] A first sensor, which is located on the base and corresponds to the first clamping member, and is used to detect whether the first clamping member moves to the limit position;

[0030] A second sensor, which is located on the base and corresponds to the second clamping member, and is used to detect whether the second clamping member moves to the limit position;

[0031] A third sensor, which is arranged at one end of one of the wedge-shaped blocks away from the bag body, and is used to detect whether the closing member clamps the bag body.

[0032] Preferably, it further includes an elastic component, and the elastic component is arranged between the two clamping surfaces of the clamping mechanism. The elastic component includes:

[0033] A plurality of elastic members, and the plurality of elastic members are all arranged on the side of the second clamping member close to the first clamping member. The deformation direction of the elastic member is parallel to the extension direction of the guiding member;

[0034] A pressing member, which is fixedly connected to the plurality of elastic members and is located between the first clamping member and the second clamping member. A through hole is provided in the middle of the pressing member and is sleeved outside the heat fusion mechanism. In the natural state, the distance between the pressing member and the first clamping member is greater than the distance between the heat fusion mechanism and the first clamping member, so that when the bag body is pressed in the extension direction of the guiding member, there is a gap between the bag body and the heat fusion mechanism.

[0035] (III) Beneficial effects

[0036] Compared with the prior art, the beneficial effects of the present utility model are:

[0037] During actual use, the bag body is passed through the through hole in the middle of the base. Taking the moving direction of the clamping mechanism as the transverse direction, under the action of the clamping mechanism, the bag body will be pressed tightly in the transverse direction. Taking the direction of the connection line of the corresponding positions of the two opposite closing members as the longitudinal direction, under the action of the closing mechanism, the driving assembly will drive the closing assembly to close the bag body. Specifically, the two sets of oppositely arranged closing members will rotate in opposite directions. For example, one set of closing members rotates clockwise and the other set rotates counterclockwise, so as to bundle and clamp the bag body in the transverse direction. Then, with the cooperation of the clamping mechanism, the sealing part of the bag body can be bundled into a bunch, thereby increasing the thickness of the sealing part of the bag body and preventing the bag body from being damaged during the hot pressing process. Since both the clamping mechanism and the closing mechanism clamp the bag body by the relative movement and approximation of two components, the finally bundled position of the bag body is basically located at the central part of the through hole, making the deformation of each part of the bag body basically the same and not easily leaking during sealing. After the bag body is bundled, the sealing part of the bag body is hot-pressed and sealed by the heat fusion mechanism, and the sealing of the bag body can be completed. Generally speaking, by using this sealing device, the sealing effect of the bag body can be better.

[0038] Furthermore, since a rack is provided on the base and the extending direction of the rack is parallel to the extending direction of the guiding member, the moving assembly includes a first motor and a second motor. The first motor is arranged on the first clamping member, and the first motor is drivingly connected to a first shaft. A first gear meshing with the rack is fixedly connected to the first shaft. The second motor is arranged on the second clamping member, and the second motor is drivingly connected to a second shaft. A second gear meshing with the rack is fixedly connected to the second shaft. Therefore, the first clamping member can be driven independently by the first motor, and the second clamping member can be driven independently by the second motor, so that the first clamping member and the second clamping member can move towards each other to clamp the bag body, or can move in the same direction to move the bag body. When used in cooperation with a garbage collection container, the placement position of the bag body after sealing can be adjusted to prevent accumulation and improve space utilization. In addition, when this sealing device is used in cooperation with a non-break garbage bag and the first clamping member and the second clamping member move in the same direction, it can also assist in tearing the garbage bag after sealing and stretching the garbage bag above downward. Description of the Drawings

[0039] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0040] Figure 1 A perspective view of the sealing device of the present invention before closing the bag body is shown;

[0041] Figure 2 Shows Figure 1 A perspective view of the sealing device from another angle in

[0042] Figure 3 shows Figure 1 a three-dimensional view of the base, rack, first sensor and second sensor in

[0043] Figure 4 shows Figure 1 a partial three-dimensional view of the sealing device in

[0044] Figure 5 shows Figure 4 a three-dimensional view from another angle;

[0045] Figure 6 shows Figure 4 a partial three-dimensional view of

[0046] Figure 7 shows Figure 6 an enlarged view of part A in

[0047] Figure 8 shows Figure 1 a three-dimensional view of the sealing device after closing the bag body in

[0048] Figure 9 shows Figure 8 a three-dimensional view from another angle.

[0049] In the figure: 1. Base; 2. Clamping mechanism; 21. Guide; 22. First clamping member; 23. Second clamping member; 24. Moving assembly; 241. First motor; 242. Second motor; 243. First shaft; 244. Second shaft; 245. First gear; 246. Second gear; 3. Closing mechanism; 31. Driving assembly; 311. Limit block; 312. Wedge block; 313. Slope; 32. Closing assembly; 321. Closing member; 4. Heat melting mechanism; 5. Through hole; 6. Rack; 7. First sensor; 8. Second sensor; 9. Third sensor; 10. Elastic assembly; 101. Pressing member; 102. Perforation; 11. Positioning hole; 12. Slide block. Specific embodiments

[0050] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0051] Refer to attached Figure 1 and attached Figure 2 and attached Figure 8, an embodiment of the present utility model discloses a sealing device for sealing a bag body, which includes a base 1, a clamping mechanism 2, a closing mechanism 3, and a heat fusion mechanism 4. A through hole 5 is provided in the middle of the base 1 so that the bag body can pass through the base 1; the clamping mechanism 2 is arranged on the base 1 and is used for clamping the bag body; the closing mechanism 3 includes a driving component 31 and a closing component 32. The driving component 31 is fixedly connected to the clamping mechanism 2. The closing component 32 is composed of two sets of oppositely arranged closing members 321. Each set of closing members 321 includes at least one closing member 321. The closing member 321 is rotatably connected to the clamping mechanism 2 and is drivingly connected to the driving component 31, so that the driving component 31 can drive the closing member 321 to rotate around the clamping mechanism 2. The plane formed when the closing member 321 rotates is parallel to the plane where the moving direction of the clamping mechanism 2 is located, so that the angle formed by the two opposite closing members 321 facing the bag body can gradually increase to accommodate the bag body, and the angle formed by the two opposite closing members 321 facing the bag body can gradually decrease to close the bag body; the heat fusion mechanism 4 is arranged on the clamping surface of the clamping mechanism 2 and is used for heat-sealing the bag body that is closed into a bundle.

[0052] During the actual use process, the bag body is passed through the through hole 5 in the middle of the base 1. Taking the moving direction of the clamping mechanism 2 as the horizontal direction, under the action of the clamping mechanism 2, the bag body will be pressed tightly in the horizontal direction. Taking the connection line direction of the corresponding positions of the two opposite closing members 321 as the vertical direction, under the action of the closing mechanism 2, the driving component 32 will drive the closing component 32 to close the bag body. Specifically, the two sets of oppositely arranged closing members 321 will rotate in opposite directions. For example, one set of closing members 321 rotates clockwise, and the other set of closing members 321 rotates counterclockwise, so as to close and clamp the bag body in the horizontal direction. With the cooperation of the clamping mechanism 2, the sealing part of the bag body can be closed into a bundle, thereby increasing the thickness of the sealing part of the bag body and preventing the bag body from being damaged during the hot pressing process. Since both the clamping mechanism 2 and the closing mechanism 3 clamp the bag body by the relative movement and approximation of two components, the finally closed position of the bag body is basically located at the center of the through hole 5, making the deformation of each part of the bag body basically the same and not easily leaking during sealing. After the bag body is closed, the heat fusion mechanism 4 is used to hot-press and seal the sealing part of the bag body, and the sealing of the bag body can be completed; generally speaking, by using this sealing device, the sealing effect of the bag body can be better.

[0053] It should be noted that the above-mentioned bag body and heat fusion mechanism 4 are both prior arts. The bag body can be a single bag body or a non-breakable garbage bag; the heat fusion mechanism 4 can be a hot-press sealing machine, which uses the technology of hot-press sealing to heat-seal the bag body; in addition, since the bag body in this application has not been structurally improved and belongs to the prior art, in order to highlight the structure of other components, the bag body is not shown in the drawings.

[0054] Refer to the attachedFigure 3 , appendage Figure 4 and appendage Figure 7 , there are various structures that can play a clamping role. To facilitate understanding of the specific structure of the sealing device in this application, one design method of the clamping mechanism 2 is introduced in this embodiment. Specifically, the through hole 5 is vertically arranged and its cross-section is basically rectangular. The clamping mechanism 2 includes a guiding member 21, a first clamping member 22, a second clamping member 23, and a moving component 24. The guiding member 21 is fixedly arranged on the base 1 and corresponds to the through hole 5. The extending direction of the guiding member 21 is parallel to the length direction of the through hole 5; the first clamping member 22 is slidably connected to the guiding member 21; the second clamping member 23 is slidably connected to the guiding member 21, and the heat melting mechanism 4 is arranged on the side of the second clamping member 23 close to the first clamping member 22; the moving component 24 is drivingly connected to the first clamping member 22 and the second clamping member 23, and can move the first clamping member 22 and the second clamping member 23 towards each other along the extending direction of the guiding member 21 to clamp the bag body.

[0055] It should be noted that in this application, the specific structures of the sliding connection between the first clamping member 22 and the guiding member 21, the specific structures of the sliding connection between the second clamping member 23 and the guiding member 21, the specific structure and quantity of the guiding member 21 itself, etc. are not limited, and can be flexibly selected according to actual needs; for example, the guiding member 21 can be set as a column, and guiding holes corresponding to the guiding member 21 are arranged on the first clamping member 22 and the second clamping member 23, so that the first clamping member 22 and the second clamping member 23 can be slidably connected to the guiding member 21 and can move along the extending direction of the guiding member 21; based on the above scheme, when the guiding member 21 is a cylinder, at least two guiding members 21 need to be arranged to prevent the first clamping member 22 and the second clamping member 23 from rotating around the guiding member 21; when the guiding column 21 is a prism, at least one guiding member 21 needs to be arranged. At this time, even if there is only one guiding member 21, the edges and corners of its own structure can prevent the first clamping member 22 and the second clamping member 23 from rotating around the guiding member 21.

[0056] Through the design of the above structure, place the bag body between the first clamping member 22 and the second clamping member 23 and make it pass through the through hole 5. Start the moving component 4, and the first clamping member 22 and the second clamping member 23 can move towards each other and approach until the bag body is pressed between the clamping surface of the first clamping member 22 and the melting surface of the heat melting mechanism 4, so as to press and heat-seal the bag body.

[0057] Refer to appendage Figure 5 , appendage Figure 6 and appendage Figure 9, Based on the above solution, there are various structures that can drive the movement of components. To facilitate the understanding of the working principle of the moving component 4 and enrich the functions of this sealing device, the moving component 4 is designed as follows in this embodiment. Specifically, a rack 6 is provided on the base 1, and the extending direction of the rack 6 is parallel to the extending direction of the guide member 21. The moving component 24 includes a first motor 241 and a second motor 242. The first motor 241 is arranged on the first clamping member 22, and the first motor 241 is drivingly connected to a first shaft 243. A first gear 245 that meshes with the rack 6 is fixedly connected to the first shaft 243. The second motor 242 is arranged on the second clamping member 23, and the second motor 242 is drivingly connected to a second shaft 244. A second gear 246 that meshes with the rack 6 is fixedly connected to the second shaft 244.

[0058] Through the design of the above structure, when the first motor 241 is started, the first shaft 243 will rotate accordingly and drive the first gear 245 to rotate. Since the first gear 245 meshes with the rack 6 and the rack 6 is fixedly connected to the base 1, therefore, while the first gear 245 is rotating, it will also move along the extending direction of the guide member 21. Similarly, when the second motor 242 is started, the second shaft 244 will rotate accordingly and drive the second gear 246 to rotate. Since the second gear 246 meshes with the rack 6 and the rack 6 is fixedly connected to the base 1, therefore, while the second gear 246 is rotating, it will also move along the extending direction of the guide member 21.

[0059] Based on the above solution, when the first motor 241 is started alone, the first clamping member 22 can move alone along the extending direction of the guide member 21. When the second motor 242 is started alone, the second clamping member 23 can move alone along the extending direction of the guide member 21. When the first motor 241 and the second motor 242 are started simultaneously, the first clamping member 22 and the second clamping member 23 can move towards each other along the extending direction of the guide member 21, so that the first clamping member 22 and the second clamping member 23 approach each other and clamp the bag body or move away from each other and loosen the bag body. When the first motor 241 and the second motor 242 are started simultaneously, the first clamping member 22 and the second clamping member 23 can move in the same direction along the extending direction of the guide member 21 to adjust the position of the bag body and tear the bag body.

[0060] Refer to the appendix Figure 4 、appendix Figure 5 、appendix Figure 8 and appendix Figure 9, there are various structures capable of driving the component to rotate. In this embodiment, one of them is introduced. Specifically, the closing member 321 is rotatably connected to the first clamping member 22. The included angle formed by two opposite closing members 321 facing the bag body is the closing angle. The driving assembly 31 includes two groups of limiting blocks 311, two groups of wedge-shaped blocks 312, and two groups of torsion springs. The two groups of limiting blocks 311 are oppositely arranged on the first clamping member 22. The limiting blocks 311 and the closing members 321 are arranged in one-to-one correspondence. Two opposite limiting blocks 311 are located outside two opposite closing members 321, and are used to limit the rotation range of the closing member 321, so that when the closing member 321 abuts against the corresponding limiting block 311, the closing angle is the maximum value; the two groups of wedge-shaped blocks 312 are oppositely arranged on the second clamping member 23. The wedge-shaped blocks 312 and the closing members 321 are arranged in one-to-one correspondence. There is a gap between two opposite wedge-shaped blocks 312 and slopes 313 are provided on the opposite surfaces. When the closing angle is the maximum value, the opening formed by the sides of two opposite slopes 313 close to the bag body is larger than the opening formed by the sides away from the bag body and larger than the opening formed by the sides of two opposite closing members 321 close to the bag body, so that the closing member 321 can abut against the slope 313, and the closing angle will gradually become smaller as the first clamping member 22 and the second clamping member 23 approach; the torsion springs and the closing members 321 are arranged in one-to-one correspondence. The torsion springs are arranged at the rotatable connection part of the closing member 321 and the first clamping member 22. The closing member 321 abuts against the corresponding limiting block 311 under the action of the torsion spring, so that the closing angle is the maximum value in the natural state.

[0061] Through the design of the above structure, when the first clamping member 22 and the second clamping member 23 are far apart, the closing member 321 will abut against the corresponding limiting block 311 under the action of the torsion spring. At this time, the closing angle is the maximum value; when the closing member 321 just abuts against the slope 313 on the corresponding wedge-shaped block 312, the closing angle is still the maximum value. Then, during the process of the first clamping member 22 and the second clamping member 23 approaching each other, the closing member 321 will rotate under the guiding action of the slope 313, making the closing angle gradually become smaller until the first clamping member 22 and the heat melting mechanism 4 press the bag body. At this time, the closing angle is the minimum value; then, when the first clamping member 22 and the second clamping member 23 move away from each other, the closing member 321 will automatically reset under the action of the torsion spring, making the closing angle gradually become larger.

[0062] Generally speaking, the wedge-shaped block 312 is passively driven to close two opposite closing members 321, that is, the closing angle is reduced, by the mutual approach of the first clamping member 22 and the second clamping member 23; the torsion spring stores energy through its own deformation and actively drives two opposite closing members 321 to expand, that is, the closing angle is increased, during the process of the first clamping member 22 and the second clamping member 23 moving away from each other.

[0063] It should be noted that the above "towards the bag body, close to the bag body, away from the bag body" refers to the situation when the bag body is located between the first clamping member 22 and the second clamping member 23 and passes through the through hole 5; in addition, since the torsion spring belongs to the prior art, its structure and working principle are common knowledge, and the torsion spring is arranged at the rotational connection part of the folding member 321 and the first clamping member 22, which is not easy to see, so it is not shown in the drawings.

[0064] It should be noted that taking the maximum value of the folding angle as a positive value, that is, when the folding member 321 abuts against the corresponding limiting block 311, the included angle formed by the two opposite folding members 321 towards the bag body; when the folding angle is a negative value, although the absolute value of the folding angle is larger than zero, the positive and negative factors need to be considered, that is, when the folding angle is a negative value, its angle is regarded as smaller than zero.

[0065] It should be noted that according to the content in the above technical solution, it can be directly and unambiguously determined that one end of the folding member 321 will obviously extend out of the clamping surface of the first clamping member 22 so that the folding member 321 can contact the bag body during rotation; the wedge block 312 and the folding member 321 are obviously located in the same plane, so that the folding member 321 can abut against the wedge block 312 and rotate along with the guiding action of the slope 313; in order to make the rotation angles of the two opposite folding members 321 basically the same, the extending direction of the symmetry axis of the two opposite wedge blocks 312 can be made parallel to the extending direction of the guiding member 21, and the symmetry axes of the two opposite folding members 321 and the symmetry axes of the two opposite abutting wedge blocks 312 are collinear.

[0066] Based on the above solution, when the opening formed on the side away from the bag body of the two opposite slopes 313 is larger than the distance between the rotation centers of the two opposite folding members 321, the minimum value of the folding angle is a positive value; when the opening formed on the side away from the bag body of the two opposite slopes 313 is equal to the distance between the rotation centers of the two opposite folding members 321, the minimum value of the folding angle is zero; when the opening formed on the side away from the bag body of the two opposite slopes 313 is smaller than the distance between the rotation centers of the two opposite folding members 321, the minimum value of the folding angle is a negative value.

[0067] Furthermore, a spring can be used instead of the torsion spring to enable the two opposite folding members 321 to expand actively. Specifically, when using a spring to drive the folding member 321 to expand actively, the spring should be arranged between the two opposite folding members 321. At this time, one spring can replace two torsion springs and can simultaneously drive the two opposite folding members 321 to rotate, and can play the same role as the torsion spring in expanding the two opposite folding members 321.

[0068] Refer to the attached Figure 8 and the attached Figure 9Furthermore, the following design is also carried out in this embodiment. Specifically, the length of the rotation radius of the gathering piece 321 is greater than the length of the wedge block 312 in the moving direction, so that when the first clamping piece 22 abuts against the hot melt mechanism 4, the gathering piece 321 can pass through the opening formed by the two opposite slopes 313 on the side away from the bag body; the opening formed by the two opposite slopes 313 on the side away from the bag body is smaller than the distance between the rotation points of the two opposite gathering pieces 321, so that when the first clamping piece 22 abuts against the hot melt mechanism 4, the value of the gathering angle is a negative value; when the gathering angle is equal to zero, there is a distance between the first clamping piece 22 and the hot melt mechanism 4 to ensure that the bag body is heat-pressed and sealed by the hot melt mechanism 4 before it is gathered to a certain extent.

[0069] Through the design of the above structure, the bag body can be folded more tightly and thicker, and can be heat-sealed by the hot-melt mechanism 4 only after being folded to a certain extent, so that the bag body is not easily damaged when being sealed.

[0070] It should be noted that the wedge block 312 moves with the movement of the second clamping member 23 , so the moving direction of the wedge block 312 , that is, the moving direction of the second clamping member 23 , is also the extending direction of the guide member 21 .

[0071] See attached Figure 1 , Attachment Figure 8 and attached Figure 9 Furthermore, the following design is also carried out in this embodiment. Specifically, each group of folding members 321 includes two folding members 321, and the two folding members 321 of the same group are rotatably connected to the top and bottom of the first clamping member 22 respectively.

[0072] Through the design of the above structure, the range of the folded part of the bag body can be increased.

[0073] See attached Figure 1 Furthermore, the following design is also carried out in this embodiment. Specifically, it also includes a first sensor 7, a second sensor 8, and a third sensor 9. The first sensor 7 is located on the base 1 and is arranged corresponding to the first clamping member 22, and is used to detect whether the first clamping member 22 moves to the extreme position; the second sensor 8 is located on the base 1 and is arranged corresponding to the second clamping member 23, and is used to detect whether the second clamping member 23 moves to the extreme position; the third sensor 9 is arranged at one end of one of the wedge blocks 312 away from the bag body, and is used to detect whether the gathering member 321 clamps the bag body.

[0074] It should be noted that the first sensor 7, the second sensor 8, and the third sensor 9 are all prior arts, so their working principles are not described in detail here.

[0075] See attached Figure 4 and attached Figure 5, Further, the following design is also carried out in this embodiment. Specifically, it further includes an elastic component 10. The elastic component 10 is arranged between the two clamping surfaces of the clamping mechanism 2. The elastic component 10 includes a plurality of elastic members and a pressing member 101. The plurality of elastic members are all arranged on the side of the second clamping member 23 close to the first clamping member 22. The deformation direction of the elastic members is parallel to the extending direction of the guiding member 21; the pressing member 101 is fixedly connected to the plurality of elastic members and is located between the first clamping member 22 and the second clamping member 23. A perforation 102 is provided in the middle of the pressing member 101 and is sleeved outside the heat fusion mechanism 4. In the natural state, the distance between the pressing member 101 and the first clamping member 22 is greater than the distance between the heat fusion mechanism 4 and the first clamping member 22, so that when the bag body is pressed in the extending direction of the guiding member 21, there is a gap between the bag body and the heat fusion mechanism 4.

[0076] Based on the above solution, taking the extending direction of the guiding member 21 as the transverse direction and the connecting line direction of the corresponding positions of the two opposite closing members 321 as the longitudinal direction, when the bag body is just pressed between the first clamping member 22 and the pressing member 101, the bag body is compressed to the limit in the transverse direction. At this time, there is still a gap between the bag body and the heat fusion mechanism 4; then continue to make the first clamping member 22 and the second clamping member 23 approach each other. The elastic members will be compressed, the pressing member 101 and the heat fusion mechanism 4 will move relatively, and the two opposite closing members 321 will gradually close, so that the bag body is gradually compressed in the longitudinal direction. When the bag body is pressed between the first clamping member 22 and the heat fusion mechanism 4, the bag body is compressed to the limit in the transverse direction in the longitudinal direction. At this time, the bag body is completely closed. That is, through the design of the above structure, the bag body can be completely closed before being heat-sealed by the heat fusion mechanism 4. The thickness of the sealed part of the bag body after closing is thicker, not easily damaged, and the sealing effect is better.

[0077] Refer to the appendix Figure 6 and the appendix Figure 7 , Further, in order to limit the deformation direction of the elastic members, a positioning hole 11 with an opening facing the first clamping member 22 can be provided on the second clamping member 23, a sliding block 12 corresponding to the positioning hole 11 can be provided on the pressing member 101, and the length of the elastic member is made less than the length of the positioning hole 11, and one end is connected to the end of the positioning hole 11 and the other end is connected to the sliding block 12. In this way, the deformation direction of the elastic member can be limited, so that the pressing member 101 can only move back and forth in one direction, effectively preventing misalignment.

[0078] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0079] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without further statement, these terms have no special meaning and therefore should not be construed as limiting the protection scope of the present application.

[0080] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing device for sealing a bag, characterized in that: include: A base, wherein a through hole is provided in the middle of the base so that the bag body can pass through the base; A clamping mechanism, the clamping mechanism is arranged on the base and is used to clamp the bag body; A folding mechanism, wherein the folding mechanism comprises a driving assembly and a folding assembly, wherein the driving assembly is fixedly connected to the clamping mechanism, and the folding assembly is composed of two groups of folding members arranged opposite to each other, and each group of folding members comprises at least one folding member, wherein the folding member is rotatably connected to the clamping mechanism and drivingly connected to the driving assembly, so that the driving assembly can drive the folding member to rotate around the clamping mechanism, and a plane formed when the folding member rotates is parallel to a plane where a moving direction of the clamping mechanism is located, so that an angle formed by two opposite folding members toward the bag body can gradually increase to accommodate the bag body, and an angle formed by two opposite folding members toward the bag body can gradually decrease to fold the bag body; A hot-melt mechanism is arranged on the clamping surface of the clamping mechanism and is used for hot-melting and sealing the bags gathered into a bundle.

2. A sealing device according to claim 1, characterized in that: The through hole is vertically arranged and has a substantially rectangular cross section, and the clamping mechanism comprises: A guide member, the guide member is fixed on the base and arranged corresponding to the through hole, and the extension direction of the guide member is parallel to the length direction of the through hole; a first clamping member, wherein the first clamping member is slidably connected to the guide member; A second clamping member, wherein the second clamping member is slidably connected to the guide member, and the hot melt mechanism is arranged on a side of the second clamping member close to the first clamping member; A moving component is driven to connect the first clamping member and the second clamping member, so that the first clamping member and the second clamping member can move toward each other to clamp the bag body.

3. A sealing device according to claim 2, characterized in that: The base is provided with a rack, the extension direction of the rack and the extension direction of the guide member are parallel to each other, and the moving assembly includes: A first motor, the first motor is disposed on the first clamping member, the first motor is drivingly connected to a first shaft, and a first gear meshing with the rack is fixedly connected to the first shaft; A second motor, the second motor is disposed on the second clamping member, the second motor is drivingly connected to a second shaft, and a second gear meshing with the rack is fixedly connected to the second shaft; Starting the first motor alone can make the first clamping member move alone along the extension direction of the guide member; starting the second motor alone can make the second clamping member move alone along the extension direction of the guide member; starting the first motor and the second motor at the same time can make the first clamping member and the second clamping member move toward each other along the extension direction of the guide member, so that the first clamping member and the second clamping member approach each other and clamp the bag body or move away from each other and release the bag body; starting the first motor and the second motor at the same time can make the first clamping member and the second clamping member move in the same direction along the extension direction of the guide member to adjust the position of the bag body and tear the bag body.

4. A sealing device according to claim 2, characterized in that: The folding member is rotatably connected to the first clamping member, and an angle formed by two opposite folding members toward the bag body is a folding angle. The driving assembly includes: Two groups of limit blocks, the two groups of limit blocks are relatively arranged on the first clamping member, the limit blocks and the folding members are arranged one-to-one, the two opposite limit blocks are located outside the two opposite folding members, and are used to limit the rotation range of the folding members, so that when the folding members abut against the corresponding limit blocks, the folding angle is at a maximum value; Two groups of wedge blocks, the two groups of wedge blocks are relatively arranged on the second clamping member, the wedge blocks and the gathering members are arranged one by one, there is a distance between the two opposite wedge blocks, and the opposite surfaces are provided with slopes, when the gathering angle is at a maximum value, the opening formed by the two opposite slopes on the side close to the bag body is larger than the opening formed by the side away from the bag body, and larger than the opening formed by the two opposite gathering members on the side close to the bag body, so that the gathering members can abut against the slopes, and the gathering angle will gradually decrease as the first clamping member and the second clamping member approach each other; Two groups of torsion springs are arranged in one-to-one correspondence with the folding member. The torsion springs are arranged at the rotation connection position between the folding member and the first clamping member. The folding member abuts against the corresponding limit block under the action of the torsion springs to make the folding angle in the natural state to be the maximum value.

5. A sealing device according to claim 4, characterized in that: The length of the rotation radius of the folding member is greater than the length of the wedge block in the moving direction, so that when the first clamping member abuts against the hot melting mechanism, the folding member can pass through the openings formed by the two opposite slopes away from the side of the bag body; The opening formed by the two opposite slopes on the side away from the bag body is smaller than the distance between the rotation points of the two opposite folding members, so that when the first clamping member abuts against the hot melt mechanism, the value of the folding angle is a negative value; when the folding angle is equal to zero, there is a distance between the first clamping member and the hot melt mechanism.

6. A sealing device according to claim 4, characterized in that: Each group of the folding members includes two folding members, and the two folding members in the same group are rotatably connected to the top and bottom of the first clamping member respectively, so as to increase the range of the folded part of the bag body.

7. A sealing device according to claim 4, characterized in that: Also includes: A first sensor, the first sensor is located on the base and is arranged corresponding to the first clamping member, and is used to detect whether the first clamping member moves to the limit position; A second sensor, the second sensor is located on the base and is arranged corresponding to the second clamping member, and is used to detect whether the second clamping member moves to the limit position; A third sensor is arranged at one end of one of the wedge-shaped blocks away from the bag body, and is used to detect whether the folding member clamps the bag body.

8. A sealing device according to claim 4, characterized in that: It also includes an elastic component, which is arranged between the two clamping surfaces of the clamping mechanism, and the elastic component includes: A plurality of elastic members, wherein the plurality of elastic members are arranged on a side of the second clamping member close to the first clamping member, and a deformation direction of the elastic members is parallel to an extension direction of the guide member; A pressing member, wherein the pressing member is fixedly connected to the plurality of elastic members and is located between the first clamping member and the second clamping member, a through hole is provided in the middle portion of the pressing member and the pressing member is sleeved on the outside of the hot melt mechanism, and in a natural state, a distance between the pressing member and the first clamping member is greater than a distance between the hot melt mechanism and the first clamping member, so that when the bag body is pressed in the extension direction of the guide member, there is a distance between the bag body and the hot melt mechanism.

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