Sealing machine for comprehensive thermal shrinkage of cigarette evidence preservation

Abstract

The invention discloses a sealing machine for comprehensive thermal shrinkage of cigarette evidence preservation, and relates to the technical field of sealing machines, the sealing machine comprises a sealing box, the two ends and the two sides of the sealing box are each provided with two sliding grooves, and a contact plate is jointly arranged in every two aligned sliding grooves in a sliding mode; a sealing structure is arranged between the contact plate and the sliding groove where the contact plate is located. The contact plate is made of a material which is good in thermal conductivity and does not deform after being heated; centering mechanisms are arranged on the outer wall of one side of the sealing box and the outer wall of one end of the sealing box, and the centering mechanisms enable the two contact plates at the same positions of the centering mechanisms to conduct centering movement; and a sliding resistor is fixed on the outer side of the sealing box. The device is provided with the detection assembly, the detection assembly converts the shrinkage amount of the protective film outside the carton into the current variable quantity capable of being monitored, and when the current variable quantity stays in a certain current range for an overlong time, the detection assembly enables the whole device to be powered off.

Description

Technical Field

[0001] The invention relates to the technical field of sealing machines, in particular to a sealing machine capable of fully heat shrinking cigarette evidence. Background Art

[0002] When sealing and sampling seized cigarette items involved in the case, the cigarettes are usually placed directly in cartons and sealed up and taken away. However, this method does not achieve full sealed preservation of cigarette evidence, and the carton container material is fragile and easily damaged, and the seals are easily replaced. This may result in cigarettes being lost, damaged, swapped, or replaced during storage or transportation, thus affecting the integrity and reliability of the evidence. Therefore, multiple layers of protective film are wrapped around the outside of the carton, which are then heat-shrunk to allow the protective film to fit tightly against the carton.

[0003] After searching, the Chinese patent document with the authorization announcement number CN215707602U discloses a heat shrinking machine, which involves the field of packaging equipment, including a casing, first and second sliding fixtures, first and second electric heating elements, and an isolation plate made of heat-insulating material; the casing is separated into first and second heat shrinking spaces by the isolation plate, the first and second electric heating elements are both installed on the inner top wall of the casing, and the first electric heating element is located in the first heat shrinking space, and the second electric heating element is located in the second heat shrinking space; the side of the casing is provided with first and second heat shrinking space operation ports; the first sliding fixture is slidably connected to the inner side wall of the casing in a manner that it can slide into or out of the first heat shrinking space from the first heat shrinking space operation port, and the second sliding fixture is slidably connected to the inner side wall of the casing in a manner that it can slide into or out of the second heat shrinking space from the second heat shrinking space operation port. This patent alleviates the technology in the prior art that the adjacent heating stations of the heat shrinking machine compensate for each other's temperature and interfere with each other, resulting in the melting of the packaged product or unreliable packaging.

[0004] The above-mentioned heat shrink machine can be used to heat shrink the protective film on the outside of the carton. Based on the above search and combined with the prior art, it is found that: since the carton is placed in a sealed environment, it is inconvenient for the operator to observe. If the heating time is too long, the protective film shrinks excessively, which will cause the protection to be damaged. If the heating time is too short, the protective film cannot fit the carton well. Summary of the invention

[0005] The object of the present invention is to provide a sealing machine for comprehensive heat shrinkage of cigarette evidence preservation, so as to solve the problems raised in the above-mentioned background technology.

[0006] The technical solution of the present invention is: a sealing machine for preserving full heat shrinkage of cigarette evidence, comprising a sealing box, two slide grooves are provided at both ends and both sides of the sealing box, and a contact plate is provided inside each of the two aligned slide grooves for sliding together;

[0007] A sealing structure is provided between the contact plate and the slide groove where the contact plate is located;

[0008] The contact plate is made of a material with good thermal conductivity and does not deform when heated.

[0009] On one outer wall and one end outer wall of the sealed box, centering mechanisms are provided, and the centering mechanisms enable the two contact plates at the same position to perform centering movements.

[0010] A sliding resistor is fixed on the outside of the sealed box, and a fixed plate is jointly fixed to one end of one contact plate and the sliding piece of the sliding resistor.

[0011] A control box is fixed on the outside of the sealed box. The control box is provided with a detection component. The detection component includes a DC power supply, an electromagnetic switch, a single-chip microcomputer, and a timer. The DC power supply, the electromagnetic switch, the single-chip microcomputer, and the timer are all fixed in the control box. The electromagnetic switch, the timer, and the current sensor are all electrically connected to the single-chip microcomputer. The electromagnetic switch, the DC power supply, the current sensor, and the sliding resistor are connected in series.

[0012] Preferably, a box cover is hingedly installed on one side of the box opening of the sealed box.

[0013] Preferably, hollow layers are provided inside both the sealed box and the box cover, and heat insulation layers are filled inside the hollow layers.

[0014] Preferably, heating sheets are fixed around and at the bottom of the sealed box, and the heating sheets are mica heating plates.

[0015] Preferably, a stirring electric fan is fixed on the side of the box cover facing the box opening of the sealed box.

[0016] Preferably, a hollow basket is provided inside the sealed box. At the four corners of the bottom of the hollow basket, columns integrally formed therewith are provided. The bottom ends of the columns are fixed to the bottom inside the sealed box. The hollow basket is made of a material with good thermal conductivity and does not deform when heated.

[0017] Preferably, a temperature sensor is provided inside the sealed box, and the temperature sensor is electrically connected to the single-chip microcomputer.

[0018] Preferably, the sealing structure includes a sealing plate. The sealing plate is fixed to the contact plate. Guide strips are provided on both the upper and lower sides of the sealing plate. The guide strips are fixed to the sealed box. Guide grooves are provided on the outer sides of the guide strips. The whole sealing plate is slidably arranged in the guide grooves.

[0019] Preferably, the centering mechanism includes a rotating rod, a concave frame, a coil spring, a gear, two toothed plates and two connecting plates. One end of the rotating rod is rotatably installed on the sealing box, the gear is coaxially fixed with the rotating rod, both ends of the concave frame are fixed on the sealing box, the other end of the rotating rod is rotatably installed on the concave frame, both ends of the coil spring are respectively fixed on the rotating rod and the concave frame, one ends of the two connecting plates are respectively fixed to the two toothed plates, both toothed plates are engaged with the gear and are centrosymmetric, and the other ends of the two connecting plates are respectively fixed to the contact plate.

[0020] The present invention provides a sealing machine for comprehensively heat-shrinking cigarette evidence preservation through improvement. Compared with the prior art, it has the following improvements and advantages:

[0021] First: The present invention is provided with a detection component. The detection component converts the shrinkage amount of the protective film outside the carton into a measurable current change amount. When the current change amount stays within a certain current range for too long, the detection component cuts off the power supply of the entire device.

[0022] Second: The centering mechanism of the detection component of the present invention can place the carton in the middle position of the hollow basket, thereby preventing the carton from being too close to a certain mica sheet and avoiding the situation where the protective film on the side of the carton close to the mica sheet shrinks rapidly, causing damage to the protective film. Description of the Drawings

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic diagram of the overall first perspective structure of the present invention;

[0025] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the sealing box of the present invention;

[0026] Figure 3 It is a schematic diagram of the overall second perspective structure of the present invention;

[0027] Figure 4 For Figure 3 the enlarged structure schematic diagram at A;

[0028] Figure 5 For Figure 3 the enlarged structure schematic diagram at B;

[0029] Figure 6Schematic diagram of the three-dimensional structure of the first perspective of the sealed box of the present invention;

[0030] Figure 7 Schematic diagram of the three-dimensional structure of the second perspective of the sealed box of the present invention;

[0031] Figure 8 Schematic diagram of the structure of the hollow basket of the present invention;

[0032] Figure 9 Detection circuit diagram of the present invention;

[0033] Figure 10 Single-chip microcomputer control diagram of the present invention.

[0034] Reference numerals:

[0035] 1. Sealed box; 2. Box cover; 3. Stirring fan; 4. Hollow layer; 5. Heat insulation layer; 6. Centering mechanism; 7. Contact plate; 8. Control box; 9. Hollow basket; 10. Guide strip; 11. Sealing plate; 12. Connecting plate; 13. Toothed plate; 14. Torsion spring; 15. Rotating rod; 16. Gear; 17. Slide resistor; 18. Fixed plate; 19. Heating sheet; 20. Chute; 21. Column; 22. Electromagnetic switch; 23. Current sensor; 24. DC power supply; 25. Temperature sensor; 26. Single-chip microcomputer; 27. Timer. Detailed implementation manners

[0036] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention are clearly and completely described. 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.

[0037] The present invention provides a sealing machine for comprehensively heat shrinking cigarette evidence preservation by improvement. The technical solution of the present invention is as follows:

[0038] As Figures 1 to 10 shown, an embodiment of the present invention provides a sealing machine for comprehensively heat shrinking cigarette evidence preservation, including a sealed box 1. Two chutes 20 are opened at both ends and on both sides of the sealed box 1. A contact plate 7 is slidably arranged inside every two aligned chutes 20 together;

[0039] A sealing structure is arranged between the contact plate 7 and the chute 20 where it is located;

[0040] The contact plate 7 is made of a material with good thermal conductivity and unchanged shape when heated;

[0041] On one outer wall and one end outer wall of the sealed box 1, centering mechanisms 6 are provided, and the centering mechanisms 6 cause the two contact plates 7 at the same position as them to perform centering movements;

[0042] A sliding resistor 17 is fixed outside the sealed box 1, and one end of a fixing plate 18 is fixedly connected to the sliding piece of the sliding resistor 17 and one of the contact plates 7;

[0043] A control box 8 is fixed outside the sealed box 1, and a detection component is provided. The detection component includes a DC power supply 24, an electromagnetic switch 22, a single-chip microcomputer 26, and a timer 27. The DC power supply 24, the electromagnetic switch 22, the single-chip microcomputer 26, and the timer 27 are all fixed in the control box 8. The electromagnetic switch 22, the timer 27, and the current sensor 23 are all electrically connected to the single-chip microcomputer. The electromagnetic switch 22, the DC power supply 24, the current sensor 23, and the sliding resistor 17 are connected in series;

[0044] From the above connection relationship, the technical solution of the present invention can be known: multiple range current gradients are set. When the protective film shrinks, the contact plate 7 moves in the chute 20 accordingly. One of the contact plates 7 drives the sliding piece of the sliding resistor 17 to move, and the circuit formed by the series connection of the electromagnetic switch 22, the DC power supply 24, the current sensor 23, and the sliding resistor 17 changes. The current sensor 23 transmits the detected current value to the single-chip microcomputer 26, and the timer 27 records the residence time of the current at a certain gradient. Assuming that the residence time of the current at a certain gradient is too long, the single-chip microcomputer 26 shuts down the entire device.

[0045] Specifically, in combination with Att Figure 1 、Att Figure 3 、Att Figure 6 And Att Figure 7 As shown, a box cover 2 is hingedly installed on one side of the box opening of the sealed box 1, and the box cover 2 is made of the same material as the sealed box 1.

[0046] Specifically, in combination with Att Figure 2 As shown, hollow layers 4 are provided inside both the sealed box 1 and the box cover 2, and heat insulation layers 5 are filled inside the hollow layers 4. The heat insulation layer 5 can be made of asbestos, and asbestos has good heat insulation properties.

[0047] Specifically, in combination with Att Figure 6 And Att Figure 7 As shown, heating sheets 19 are fixed around and at the bottom of the sealed box 1. The heating sheets 19 are mica heating plates. The mica heating plates are prior art, and their specific structures and working principles will not be elaborated in detail here.

[0048] Specifically, in combination with Att Figure 1 、Att Figure 6 And Att Figure 7As shown in the figure, a stirring fan 3 is fixed on the side of the box cover 2 facing the box opening of the sealed box 1. The stirring fan 3 makes the air flow in the sealed box 1 flow, and at the same time the air flow is heated by the heating sheet 19. The heated air flow can evenly contact the outer side of the cardboard box, and the protective film on the outer side of the cardboard box shrinks.

[0049] Specifically, in combination with the attached Figure 1 , attached Figure 3 and attached Figure 8 As shown in the figure, a hollow basket 9 is arranged inside the sealed box 1. Columns 21 integrally structured with it are arranged at the four corners of the bottom of the hollow basket 9. The bottom ends of the columns 21 are fixed to the bottom inside the sealed box 1. The hollow basket 9 is made of a material with good thermal conductivity and does not deform when heated. Here, the material can be selected as iron; the hollow basket 9 is used to provide a placement space to prevent the cardboard box from contacting the bottom heating sheet 19.

[0050] Specifically, in combination with the attached Figure 10 As shown in the figure, a temperature sensor 25 is arranged inside the sealed box 1. The temperature sensor 25 is electrically connected to the single-chip microcomputer 26. The temperature sensor 25 is used to detect the temperature. The temperature sensor 25 is a prior art, and its specific structure and working principle will not be elaborated in detail here.

[0051] Specifically, in combination with the attached Figure 1 , attached Figure 3 and attached Figure 4 As shown in the figure, the sealing structure includes a sealing plate 11. The sealing plate 11 is fixed to the contact plate 7. Guide strips 10 are arranged on both the upper and lower sides of the sealing plate 11. The guide strips 10 are fixed to the sealed box 1. Guide grooves are formed on the outer sides of the guide strips 10. The whole sealing plate 11 is slidably arranged in the guide grooves; when the contact plate 7 moves, the sealing plate 11 always moves in the guide grooves of the guide strips 10, so as to ensure that the sliding groove 20 is not exposed outside the sealed box 1.

[0052] Specifically, in combination with the attached Figure 4The centering mechanism 6 includes a rotating rod 15, a recessed frame, a coil spring 14, a gear 16, two toothed plates 13 and two connecting plates 12. One end of the rotating rod 15 is rotatably mounted on the sealing box 1. The gear 16 is coaxially fixed with the rotating rod 15. Both ends of the recessed frame are fixed on the sealing box 1. The other end of the rotating rod 15 is rotatably mounted on the recessed frame. Both ends of the coil spring 14 are respectively fixed on the rotating rod 15 and the recessed frame. One end of the two connecting plates 12 is respectively fixed to the two toothed plates 13. Both toothed plates 13 are meshed with the gear 16 and the two are centrally symmetrical. The other ends of the two connecting plates 12 are respectively fixed to the contact plates 7. Each contact plate 7 is opened, and the contact plate 7 moves along the slide groove 20 in which it is located. The contact plate 7 drives the toothed plate 13 to move through the connecting plate 12 fixed thereto. The two toothed plates 13 move away from each other synchronously with the gear 16 meshed therewith. At this time, the gear 16 drives the rotating rod 15 to rotate, and the rotating rod 15 causes the coil spring 14 to rewind, so that the rotating rod 15 has a tendency to rewind.

[0053] Working principle:

[0054] The first step is to place the cigarettes in a carton, and then wrap the entire carton with a protective film;

[0055] In the second step, the contact plates 7 are pushed apart, and the contact plates 7 move along the slide grooves 20 in which they are located. The contact plates 7 drive the toothed plates 13 to move through the connecting plates 12 fixed thereto, and the two toothed plates 13 move away from each other synchronously with the gears 16 meshing therewith. At this time, the gears 16 drive the rotating rod 15 to rotate, and the rotating rod 15 causes the coil spring 14 to rewind, so that the rotating rod 15 has a tendency to rewind.

[0056] Step 3: After the second step is completed, the wrapped carton is placed in the rectangular space surrounded by the contact plates 7, and the carton is placed in the hollow basket 9. Then, the contact plates 7 are released, the coil springs 14 are reset, and the four contact plates 7 are in contact with the outer walls of the carton respectively.

[0057] The fourth step is to close the box cover 2, start the heating plate 19 and the stirring fan 3, and stir the fan 3 to make the air flow in the sealed box 1 flow. At the same time, the air flow is heated by the heating plate 19, and the heated air flow can evenly contact the outside of the carton, and the protective film on the outside of the carton shrinks;

[0058] Multiple ranges of current gradients are set. When the protective film shrinks, the contact plate 7 moves in the slide groove 20. One of the contact plates 7 drives the slider of the sliding resistor 17 to move, and the circuit formed by the electromagnetic switch 22, the DC power supply 24, the current sensor 23 and the sliding resistor 17 connected in series changes. The current sensor 23 transmits the detected current value to the single-chip microcomputer 26, and the timer 27 records the time the current stays in a certain gradient. If the current stays in a certain gradient for too long, the single-chip microcomputer 26 shuts down the entire device.

[0059] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sealing machine for preserving cigarette evidence by heat shrinking the entire cigarette, comprising a sealing box (1), characterized in that: Two slide grooves (20) are provided at both ends and both sides of the sealing box (1), and a contact plate (7) is provided inside each of the two aligned slide grooves (20) for sliding together; A sealing structure is provided between the contact plate (7) and the slide groove (20) where it is located; The contact plate (7) is made of a material with good thermal conductivity and no deformation when heated; One side outer wall and one end outer wall of the sealing box (1) are both provided with a centering mechanism (6), and the centering mechanism (6) enables two contact plates (7) at the same position to perform centering movement; A sliding resistor (17) is fixed on the outside of the sealing box (1), and a sliding piece of the sliding resistor (17) and one end of one of the contact plates (7) are fixed together with a fixing plate (18); A control box (8) is fixed on the outside of the sealed box (1), and a detection component is arranged inside the control box. The detection component includes a DC power supply (24), an electromagnetic switch (22), a single-chip computer (26) and a timer (27). The DC power supply (24), the electromagnetic switch (22), the single-chip computer (26) and the timer (27) are all fixed in the control box. The electromagnetic switch (22), the timer (27) and the current sensor (23) are all electrically connected to the single-chip computer. The electromagnetic switch (22), the DC power supply (24), the current sensor (23) and the sliding resistor (17) are connected in series.

2. A sealing machine for full heat shrinkage of cigarette evidence preservation according to claim 1, characterized in that: A box cover (2) is hingedly mounted on one side of the box opening of the sealed box (1).

3. A sealing machine for full heat shrinkage of cigarette evidence preservation according to claim 2, characterized in that: The sealed box (1) and the box cover (2) are both provided with a hollow layer (4), and the interior of the hollow layer (4) is filled with a heat insulation layer (5).

4. A sealing machine for full heat shrinkage of cigarette evidence preservation according to claim 2, characterized in that: Heating plates (19) are fixed around the four sides and the bottom of the sealed box (1), and the heating plates (19) are mica heating plates.

5. A sealing machine for full heat shrinkage of cigarette evidence preservation according to claim 2, characterized in that: A stirring electric fan (3) is fixed on the side of the box cover (2) facing the box opening of the sealed box (1).

6. A sealing machine for full heat shrinkage of cigarette evidence preservation according to claim 1, characterized in that: A hollow basket (9) is arranged inside the sealed box (1), and upright posts (21) integrally formed with the hollow basket (9) are arranged at four corners of the bottom of the hollow basket (9), and the bottom ends of the upright posts (21) are fixed to the bottom of the sealed box (1). The hollow basket (9) is made of a material having good thermal conductivity and being non-deformed when heated.

7. A sealing machine for full heat shrinkage of cigarette evidence preservation according to claim 1, characterized in that: A temperature sensor (25) is arranged inside the sealed box (1), and the temperature sensor (25) is electrically connected to a single-chip computer (26).

8. The sealing machine for full heat shrinkage of cigarette evidence preservation according to claim 1, characterized in that: The sealing structure comprises a sealing plate (11), the sealing plate (11) being fixed to the contact plate (7), guide strips (10) being arranged on both upper and lower sides of the sealing plate (11), the guide strips (10) being fixed to the sealing box (1), guide grooves being arranged on the outer side of the guide strips (10), and the sealing plate (11) being integrally slidably arranged in the guide grooves.

9. A sealing machine for full heat shrinkage of cigarette evidence preservation according to claim 8, characterized in that: The centering mechanism (6) comprises a rotating rod (15), a recessed frame, a coil spring (14), a gear (16), two toothed plates (13) and two connecting plates (12); one end of the rotating rod (15) is rotatably mounted on the sealing box (1); the gear (16) is coaxially fixed to the rotating rod (15); both ends of the recessed frame are fixed to the sealing box (1); the other end of the rotating rod (15) is rotatably mounted on the recessed frame; both ends of the coil spring (14) are respectively fixed to the rotating rod (15) and the recessed frame; one end of the two connecting plates (12) is respectively fixed to the two toothed plates (13); both of the two toothed plates (13) are meshed with the gear (16) and are centrally symmetrical; and the other ends of the two connecting plates (12) are respectively fixed to the contact plates (7).

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