Aluminum film sucking and releasing mechanism of lunch box sealing machine

Abstract

An aluminum film suction and release mechanism of a meal box sealing machine comprises a rack, a suction head frame and a suction head frame position switching mechanism capable of switching the position of the suction head frame, and is characterized in that the suction head frame comprises a suction head mounting plate, at least one suction head set is arranged on the suction head mounting plate, and each suction head set comprises a plurality of suction heads; a plurality of first guide through holes in the vertical direction are formed in the suction head mounting plate; the suction head comprises a lifting guide column, a compression spring, an upper limiting part, a suction cup base and a suction cup, the lifting guide column is located in the corresponding first guide through hole, the suction cup base is installed at the lower end of the lifting guide column, the suction cup is installed on the suction cup base, the lifting guide column is sleeved with the compression spring, and the lower end of the compression spring can apply downward acting force to the suction cup base; the upper limiting component is mounted at the upper end of the lifting guide column and is in contact fit with the upper surface of the suction head mounting plate. According to the aluminum film transfer device, the aluminum film can be reliably adsorbed, and deformation of the aluminum film can be effectively reduced when the aluminum film is transferred.

Description

Technical Field

[0001] The utility model relates to a packaging machine, in particular to an aluminum film suction and release mechanism of a lunch box sealing machine. Background Art

[0002] Pre-prepared meals and dishes are now widely used due to their convenience, such as the meals provided to passengers on civil aircraft during the flight. Pre-prepared meals and dishes usually need to be heated before consumption, so their packaging should meet the actual need of being able to heat the food quickly.

[0003] At present, most lunch boxes are aluminum foil boxes. After putting the food in the lunch box, the opening on the top of the lunch box is wrapped with aluminum film, and it can be heated before eating. The aluminum foil box material and the aluminum film are both thin, and the thickness of the aluminum film is usually smaller than that of the aluminum foil box material. After the aluminum film wraps the opening on the top of the lunch box, a small gap is usually left between the aluminum film and the outer edge of the opening to allow heat to be dissipated during the heating process.

[0004] In the production process, it is necessary to wrap the opening at the top of the lunch box with aluminum film to achieve the packaging of the food. In the prior art, aluminum film is mostly wrapped manually, which is inefficient and difficult to ensure product quality and hygiene. To this end, the applicant has developed a lunch box sealing machine that can automatically wrap the top opening of the lunch box with aluminum film, wherein the aluminum film suction and release mechanism is used to take out the aluminum film from the film storage mechanism, and then transfer and place it on the top opening of the lunch box to be sealed.

[0005] The sealing film suction and release mechanism used in the existing packaging machine includes a frame, a suction head frame and a suction head frame position switching mechanism capable of switching the position of the suction head frame. The suction head frame position switching mechanism is installed on the frame. At least one suction head is provided on the suction head mounting plate. The suction head includes a suction cup seat and a suction cup. The suction cup seat is installed on the suction head frame, and the suction cup is installed on the suction cup seat. When working, one suction head corresponds to one sealing film, and the suction cup absorbs the central part of the sealing film.

[0006] However, the aluminum film used to wrap the opening at the top of the lunch box is large and thin. If the sealing film suction and release mechanism of the existing packaging machine is used to suck and transfer the aluminum film, the edge of the aluminum film is easy to sag during the transfer process, and the aluminum film will be greatly deformed, affecting the normal subsequent wrapping of the aluminum film. In addition, due to the large area of ​​the aluminum film, the various parts of the aluminum film in the film storage mechanism are often uneven, and it is difficult for the suction head to reliably absorb the aluminum film when sucking the aluminum film.

[0007] Therefore, how to ensure that the aluminum film is reliably adsorbed when sucking and transferring the aluminum film and reduce the deformation of the aluminum film when transferring the aluminum film are problems that must be solved. Utility Model Content

[0008] The technical problem to be solved by the utility model is to provide an aluminum film suction and release mechanism for a lunch box sealing machine, which can reliably adsorb the aluminum film and effectively reduce the deformation of the aluminum film when transferring the aluminum film. The technical solution adopted is as follows:

[0009] A kind of aluminum film suction and release mechanism of lunch box sealing machine comprises a frame, a suction head frame and a suction head frame position switching mechanism capable of switching the position of the suction head frame, the suction head frame position switching mechanism is installed on the frame, and its characteristics are as follows: the suction head frame comprises a suction head mounting plate, at least one suction head group is arranged on the suction head mounting plate, and a suction head group comprises a plurality of suction heads; a plurality of first guide through holes in up and down direction are arranged on the suction head mounting plate, and the first guide through holes are the same as the total number of suction heads and correspond one to one; the suction head comprises a lifting guide column, a compression spring, an upper limit component, a suction cup seat and a suction cup, the lifting guide column is in the corresponding first guide through hole, the suction cup seat is arranged at the lower end of the lifting guide column, the suction cup is arranged on the suction cup seat, the compression spring is sleeved on the lifting guide column, the lower end of the compression spring can exert a downward force on the suction cup seat, and the upper limit component is arranged at the upper end of the lifting guide column and contacts and cooperates with the upper surface of the suction head mounting plate.

[0010] According to the number of aluminum films that need to be sucked and released at the same time, the suction heads are divided into a corresponding number of suction head groups; when working, one suction head group corresponds to one aluminum film. When working, multiple suction heads in the same suction head group respectively adsorb different parts of the aluminum film, so that the forces on various parts of the aluminum film are more balanced, and the deformation of the aluminum film can be effectively reduced when the aluminum film is transferred. Moreover, in the above suction heads, the lower end of the compression spring applies a downward force to the suction cup seat, so that the suction cup seat has a tendency to move downward. In the initial state, due to the action of the compression spring, the upper limit component is in close contact with the upper surface of the suction head mounting plate to prevent the suction cup from moving further downward. The compression spring plays a buffering role. When the aluminum film is sucked from the film storage mechanism, if different parts of the aluminum film are at different heights, the suction cups and the bottom of the suction cup seats of some suction heads will first contact the higher parts of the aluminum film. After the suction head mounting plate continues to descend, the suction cups and the suction cup seats of these suction heads will no longer descend due to obstruction, causing the compression spring to shrink slightly. Therefore, it will not hinder the suction cups of other suction heads from descending and adsorbing the lower parts of the aluminum film, so that the suction cups of each suction head in the same suction head group can be adsorbed to the aluminum film, allowing the suction head group to reliably adsorb the aluminum film.

[0011] The number of suction heads in a suction head group and their arrangement can be set according to the shape and area of ​​the aluminum film. For example, when the aluminum film is rectangular, each suction head group includes four suction heads, and the four suction heads respectively adsorb positions on the aluminum film near its four corners; or, when the aluminum film is rectangular, each suction head group includes five suction heads, one of which adsorbs the middle part of the aluminum film, and the remaining four suction heads adsorb the four corners of the aluminum film respectively.

[0012] Usually, the outer side of the opening at the top of the lunch box has an outer flange. The lunch box is transported by a conveying device, and the film suction and release mechanism first covers the opening at the top of the lunch box with an aluminum film; when the lunch box covered with aluminum film reaches the aluminum film wrapping mechanism, a box supporting mechanism can lift the lunch box so that the outer flange of the lunch box is higher than the conveying device, and then the aluminum film wrapping mechanism wraps the aluminum film on the opening at the top of the lunch box.

[0013] Usually, the lower end and the upper end of the compression spring are in close contact with the top of the suction cup seat and the lower surface of the suction head mounting plate respectively; the suction cup is installed at the bottom of the suction cup seat.

[0014] In a preferred embodiment, a plurality of upper limit grooves with notches facing downwards are provided on the lower surface of the above-mentioned suction head mounting plate. The number of the upper limit grooves is the same as that of the first guide through holes and they correspond one to one. The upper limit grooves are located below the first guide through holes. The upper end of the compression spring is located in the upper limit groove and is in close contact with the bottom of the upper limit groove.

[0015] In a preferred embodiment, a lower limit groove with an upward notch is provided on the top of the suction cup seat, and the lower end of the compression spring is located in the lower limit groove and in close contact with the bottom of the lower limit groove.

[0016] In a preferred embodiment, the upper end of the lifting guide column has an external thread section, and the upper limit component is provided with a screw hole, and the upper limit component is installed on the external thread section through the screw hole. In this case, the position of the upper limit component on the external thread section can be fine-tuned as needed, thereby adjusting the initial height position of the suction cup.

[0017] In the preferred embodiment, the suction head rack further comprises a rack body and a suction head mounting plate lifting mechanism capable of driving the suction head mounting plate to rise and fall, and the suction head mounting plate lifting mechanism is mounted on the rack body. When the aluminum film is sucked and placed, the suction head rack position switching mechanism drives the suction head rack and each suction head to move together to the top of the film storage mechanism, and then the suction head mounting plate lifting mechanism drives the suction head mounting plate and each suction head to descend, so that the suction cup of each suction head contacts the upper surface of the aluminum film, the cavity of the suction cup is evacuated, the suction cup wall is deformed and close to the aluminum film, and the aluminum film is sucked; then the suction head mounting plate lifting mechanism drives the suction head mounting plate and each suction head to rise, and the aluminum film is taken out of the film storage mechanism; then the suction head rack position switching mechanism drives the suction head rack, each suction head and aluminum film to move together to the top of the lunch box; then the suction head mounting plate lifting mechanism drives the suction head mounting plate, each suction head and aluminum film to descend, and then releases the vacuum suction of the suction cup on the aluminum film, and the aluminum film is superimposed on the opening at the top of the lunch box, thereby completing a round of suction, transfer, and placement of the aluminum film.

[0018] In a more preferred embodiment, the suction head mounting plate lifting mechanism includes a suction head mounting plate lifting cylinder, which is mounted on the frame, and the piston rod of the suction head mounting plate lifting cylinder faces downward and is connected to the suction head mounting plate. There may be multiple or one suction head mounting plate lifting cylinder. The suction head mounting plate lifting mechanism may also use an electric motor as a power source, and drive the suction head mounting plate to rise and fall through a transmission mechanism (such as a cam mechanism, a connecting rod mechanism, or a screw / nut structure).

[0019] The suction head mounting plate may be a whole or may be composed of a plurality of suction head mounting plate units.

[0020] In a preferred embodiment, a first gas channel is provided in the lifting guide column, and a second gas channel is provided in the suction cup seat, and the second gas channel connects the cavity of the suction cup with the lower end of the first gas channel. The upper end of the first gas channel is used to connect with a vacuum pumping device, and the vacuum pumping device can vacuum the cavity of the suction cup through the first gas channel and the second gas channel.

[0021] In a specific scheme, the above-mentioned tip rack position switching mechanism includes a flip servo motor, a reducer, a flip shaft, a flip bracket, a tip rack support shaft, a driving pulley, a transmission belt and a driven pulley; the flip servo motor and the reducer are fixedly mounted on the frame, the flip shaft is rotatably mounted on the frame, the power output shaft of the flip servo motor is transmission-connected with the power input shaft of the reducer, the power output shaft of the reducer is transmission-connected with one end of the flip shaft, the flip bracket is fixedly mounted on the flip shaft, the tip rack support shaft is rotatably mounted on the flip bracket, the tip rack support shaft and the flip shaft are parallel to each other, the tip rack is mounted on the tip rack support shaft (in the case where the tip rack includes a frame body and a tip mounting plate lifting mechanism, the frame body of the tip rack is mounted on the tip rack support shaft), the driving pulley is fixedly mounted on the flip shaft, the driven pulley is fixedly mounted on the tip rack support shaft, the driving pulley is transmission-connected with the driven pulley through a transmission belt, and the transmission ratio of the driving pulley to the driven pulley is 1. When the flip servo motor is running, the flip shaft is driven to rotate through the reducer, and the flip bracket rotates around the flip shaft, switching the position of the suction head rack support shaft and the suction head rack; at the same time, the active pulley rotates with the flip shaft, and the driven pulley and the suction head rack support shaft are driven by the transmission belt to rotate relative to the flip bracket, so that the suction head rack and each suction head maintain their original posture (for example, the suction cup is always kept at the bottom).

[0022] In another specific solution, the above-mentioned tip rack position switching mechanism includes a lifting mechanism, a lifting seat, a translation mechanism and a translation seat, the lifting mechanism is installed on the frame and can drive the lifting seat to lift, the translation mechanism is installed on the lifting seat and can drive the translation seat to translate, and the tip rack is installed on the translation seat (in the case where the tip rack includes a frame body and a tip mounting plate lifting mechanism, the frame body of the tip rack is installed on the translation seat). Alternatively, the above-mentioned tip rack position switching mechanism includes a translation mechanism, a translation seat, a lifting mechanism and a lifting seat, the translation mechanism is installed on the frame and can drive the translation seat to translate, the lifting mechanism is installed on the translation seat and can drive the lifting seat to lift, and the tip rack is installed on the lifting seat (in the case where the tip rack includes a frame body and a tip mounting plate lifting mechanism, the frame body of the tip rack is installed on the lifting seat).

[0023] The above lifting mechanism and translation mechanism can adopt existing technology. For example:

[0024] The lifting mechanism may include a lifting drive motor and a lifting transmission mechanism, wherein the power output shaft of the lifting drive motor is connected to the power input end of the lifting transmission mechanism, and the power output end of the lifting transmission mechanism is connected to the lifting seat. The lifting transmission mechanism may adopt a screw / nut transmission mechanism (the screw can be rotatably mounted on the frame or the translation seat and is vertically arranged, the power output shaft of the lifting drive motor is connected to one end of the screw, the nut is mounted on the lifting seat, and the nut is screwed with the screw), or a chain transmission mechanism or a belt transmission mechanism. When the power output shaft of the lifting drive motor rotates, the lifting seat is driven to rise or fall a certain distance through the lifting transmission mechanism.

[0025] The lifting mechanism can also use a lifting cylinder, which is arranged in the vertical direction, the cylinder body of which is installed on the frame or the translation seat, and the piston rod of which is connected to the lifting seat. When the piston rod of the lifting cylinder is extended or retracted, it drives the lifting seat to rise or fall a certain distance.

[0026] The above-mentioned translation mechanism may include a translation drive motor, a translation transmission mechanism and a translation guide rail. The translation drive motor and the translation guide rail are installed on a frame or a lifting seat. The power output shaft of the translation drive motor is connected to the power input end of the translation transmission mechanism. The power output end of the translation transmission mechanism is connected to the translation seat. A translation slider capable of moving along the translation guide rail is installed on the translation guide rail, and the translation slider is connected to the translation seat. The translation transmission mechanism may adopt a screw / nut transmission mechanism (the power output shaft of the translation drive motor is connected to one end of the screw, the nut is installed on the translation seat, and the nut is screwed with the screw), or a chain transmission mechanism or a belt transmission mechanism. When the power output shaft of the translation motor rotates, the translation seat is driven to move a certain distance along the translation guide rail through the translation transmission mechanism.

[0027] The above-mentioned translation mechanism can also adopt a translation cylinder, which is arranged in the horizontal direction, and the cylinder body of the translation cylinder is installed on the frame or the lifting seat, and the piston rod of the translation cylinder is connected to the translation seat.

[0028] When the utility model is working, one suction head group corresponds to one aluminum film, and multiple suction heads in the same suction head group respectively adsorb different parts of the aluminum film, so that the forces on various parts of the aluminum film are more balanced, and when adsorbing the aluminum film, each suction head in the same suction head group can adsorb the aluminum film, so that the aluminum film can be reliably adsorbed, and the deformation of the aluminum film can be effectively reduced when transferring the aluminum film. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a preferred embodiment of the utility model;

[0030] Figure 2 yes Figure 1 A top view of the aluminum film suction and release mechanism shown;

[0031] Figure 3 yes Figure 1 Schematic diagram of the structure of the suction head in the aluminum film suction and release mechanism shown. DETAILED DESCRIPTION

[0032] like Figure 1-Figure 3 As shown, the aluminum film suction and release mechanism of the lunch box sealing machine includes a frame 1, a suction head frame 2 and a suction head frame position switching mechanism 4 capable of switching the position of the suction head frame 2, and the suction head frame position switching mechanism 4 is installed on the frame 1.

[0033] In this embodiment, the tip rack 2 includes a tip mounting plate 21, a frame 22, and a tip mounting plate lifting mechanism capable of driving the tip mounting plate 21 to rise and fall, and the tip mounting plate lifting mechanism is installed on the frame 22. The tip mounting plate lifting mechanism includes a tip mounting plate lifting cylinder 23, which is installed on the frame 22, and the piston rod of the tip mounting plate lifting cylinder 23 faces downward and is connected to the tip mounting plate 21. Figure 1 and Figure 2 In this embodiment, the suction head mounting plate 21 is composed of two suction head mounting plate units 211; four suction head mounting plate lifting cylinders 23 are provided, and every two suction head mounting plate lifting cylinders 23 correspond to one suction head mounting plate unit 211.

[0034] At least one (e.g., six) suction head groups 3 are provided on the suction head mounting plate 21, and one suction head group 3 includes a plurality of (e.g., four) suction heads 31. The number of suction heads in one suction head group and their arrangement can be set according to the shape and area of ​​the aluminum film. For example, when the aluminum film is rectangular, each suction head group includes four suction heads, and the four suction heads are respectively adsorbed on the positions near the four corners of the aluminum film.

[0035] The suction head mounting plate 21 is provided with a plurality of first guide holes 24 extending in an up-and-down direction, and the total number of the first guide holes 24 is the same as the total number of the suction heads 31 and they correspond one to one. Figure 3 The suction head 31 includes a lifting guide column 311, a compression spring 312, an upper limit component 313, a suction cup seat 314 and a suction cup 315. The lifting guide column 311 is located in the corresponding first guide hole 24. The suction cup seat 314 is installed at the lower end of the lifting guide column 311. The suction cup 315 is installed on the suction cup seat 314. The compression spring 312 is sleeved on the lifting guide column 311. The lower end of the compression spring 312 can apply a downward force to the suction cup seat 314. The upper limit component 313 is installed at the upper end of the lifting guide column 311 and contacts and cooperates with the upper surface of the suction head mounting plate 21.

[0036] The lower end and the upper end of the compression spring 312 are in close contact with the top of the suction cup seat 314 and the lower surface of the suction head mounting plate 21 respectively; the suction cup 315 is installed at the bottom of the suction cup seat 314. In this embodiment, a plurality of upper limit grooves 25 with notches facing downward are provided on the lower surface of the suction head mounting plate 21. The number of the upper limit grooves 25 is the same as that of the first guide through hole 24 and they correspond one to one. The upper limit grooves 25 are located below the first guide through hole 24. The upper end of the compression spring 312 is located in the upper limit groove 25 and in close contact with the bottom of the upper limit groove 25. The top of the suction cup seat 314 is provided with a lower limit groove 316 with notches facing upward. The lower end of the compression spring 312 is located in the lower limit groove 316 and in close contact with the bottom of the lower limit groove 316.

[0037] The upper end of the lifting guide column 311 has an external thread section 317, and a screw hole is provided in the upper limit component 313, and the upper limit component 313 is installed on the external thread section 317 through the screw hole. The position of the upper limit component 313 on the external thread section 317 can be fine-tuned as needed, thereby adjusting the initial height position of the suction cup 315.

[0038] A first gas channel 318 is provided in the lifting guide column 311, and a second gas channel 319 is provided in the suction cup seat 314. The second gas channel 319 connects the cavity of the suction cup 315 with the lower end of the first gas channel 318. The upper end of the first gas channel 318 is connected to the vacuum device through the gas pipe joint 3110. The vacuum device can vacuum the cavity of the suction cup 315 through the gas pipe joint 3110, the first gas channel 318, and the second gas channel 319.

[0039] In this embodiment, the suction head rack position switching mechanism 4 includes a flip servo motor 41, a reducer 42, a flip shaft 43, a flip bracket 44, a suction head rack support shaft 45, a driving pulley 46, a transmission belt 47 and a driven pulley 48; the flip servo motor 41 and the reducer 42 are fixedly mounted on the frame 1, the flip shaft 43 can be rotatably mounted on the frame 1, the power output shaft of the flip servo motor 41 is transmission-connected with the power input shaft of the reducer 42, the power output shaft of the reducer 42 is transmission-connected with one end of the flip shaft 43, the flip bracket 44 is fixedly mounted on the flip shaft 43, The head rack support shaft 45 is rotatably mounted on the flip bracket 44, the tip rack support shaft 45 and the flip shaft 43 are parallel to each other, the tip rack 2 is mounted on the tip rack support shaft 45 (when the tip rack 2 includes a frame body 22 and a tip mounting plate lifting mechanism, the frame body 22 of the tip rack is mounted on the tip rack support shaft 45), the driving pulley 46 is fixedly mounted on the flip shaft 43, and the driven pulley 48 is fixedly mounted on the tip rack support shaft 45. The driving pulley 46 is connected to the driven pulley 48 through a transmission belt 47, and the transmission ratio of the driving pulley 46 to the driven pulley 48 is 1. When the flip servo motor 41 is running, the flip shaft 43 is driven to rotate through the reducer 42, and the flip bracket 44 rotates around the flip shaft 43, switching the position of the suction head rack support shaft 45 and the suction head rack 2; at the same time, the active pulley 46 rotates with the flip shaft 43, and drives the driven pulley 48 and the suction head rack support shaft 45 to rotate relative to the flip bracket 44 through the transmission belt 47, so that the suction head rack 2 and each suction head 31 maintain the original posture (for example, always keep the suction cup 315 at the bottom).

[0040] The following is a brief description of the working principle of the aluminum film suction and release mechanism:

[0041] When the aluminum film is sucked and released, the suction head rack position switching mechanism drives the suction head rack 2 and each suction head 31 to move to the top of the film storage mechanism 5 (the film storage mechanism 5 has six film storage units, which correspond to the six suction head groups 3 one by one), and then the suction head mounting plate lifting cylinder 23 drives the suction head mounting plate 21 and each suction head 31 to descend, so that the suction cup 315 of each suction head 31 contacts the upper surface of the aluminum film, the cavity of the suction cup 315 is evacuated, the suction cup wall is deformed and close to the aluminum film, and the aluminum film is sucked; then the suction head mounting plate is driven by the suction head mounting plate lifting cylinder 23 to drive the suction head mounting plate 21 and each suction head 31 to descend, so that the suction cup 315 of each suction head 31 contacts the upper surface of the aluminum film, the cavity of the suction cup 315 is evacuated, the suction cup wall is deformed and close to the aluminum film, and the aluminum film is sucked; then The lifting cylinder 23 drives the suction head mounting plate 21 and each suction head 31 to rise, and the aluminum film is taken out from the film storage mechanism 5; then the suction head rack position switching mechanism 4 drives the suction head rack 2, each suction head 31 and the aluminum film to move together to just above the lunch box; then the suction head mounting plate lifting cylinder 23 drives the suction head mounting plate 21, each suction head 31 and the aluminum film to descend, and then the vacuum suction of the suction cup 315 on the aluminum film is released, and the aluminum film is superimposed on the opening at the top of the lunch box, thereby completing a round of suction, transfer, and placement of the aluminum film.

[0042] In the suction head 31, the lower end of the compression spring 312 exerts a downward force on the suction cup seat 314, so that the suction cup seat 314 has a tendency to move downward. In the initial state, due to the action of the compression spring 312, the upper limit component 313 is in close contact with the upper surface of the suction head mounting plate 21, preventing the suction cup 315 from moving further downward. The compression spring 312 plays a buffering role. When the aluminum film is sucked from the film storage mechanism 5, if the heights of different parts of the aluminum film are different, the suction cups 315 and the bottoms of the suction cup seats 314 of some suction heads 31 will first contact the higher parts of the aluminum film. After the suction head mounting plate 21 continues to descend, the suction cups 315 and the suction cup seats 314 of these suction heads 31 will no longer descend due to obstruction, causing the compression spring 312 to shrink slightly, thereby not hindering the suction cups 315 of other suction heads 31 from descending and adsorbing the lower parts of the aluminum film, so that the suction cups 315 of each suction head 31 in the same suction head group 3 can be adsorbed to the aluminum film, allowing the suction head group 3 to reliably adsorb the aluminum film.

[0043] In other embodiments, the tip rack position switching mechanism may also include a lifting mechanism, a lifting seat, a translation mechanism and a translation seat, the lifting mechanism is installed on the frame and can drive the lifting seat to lift, the translation mechanism is installed on the lifting seat and can drive the translation seat to translate, and the tip rack is installed on the translation seat (in the case where the tip rack includes a frame body and a tip mounting plate lifting mechanism, the frame body of the tip rack is installed on the translation seat). Alternatively, the tip rack position switching mechanism includes a translation mechanism, a translation seat, a lifting mechanism and a lifting seat, the translation mechanism is installed on the frame and can drive the translation seat to translate, the lifting mechanism is installed on the translation seat and can drive the lifting seat to lift, and the tip rack is installed on the lifting seat (in the case where the tip rack includes a frame body and a tip mounting plate lifting mechanism, the frame body of the tip rack is installed on the lifting seat).

Claims

1. An aluminum film suction and release mechanism of a lunch box sealing machine, comprising a frame, a suction head frame and a suction head frame position switching mechanism capable of switching the position of the suction head frame, wherein the suction head frame position switching mechanism is installed on the frame, and is characterized in that: The suction head rack includes a suction head mounting plate, at least one suction head group is arranged on the suction head mounting plate, and one suction head group includes multiple suction heads; the suction head mounting plate is provided with multiple first guide through holes running up and down, and the first guide through holes are the same as the total number of suction heads and correspond one to one; the suction head includes a lifting guide column, a compression spring, an upper limit component, a suction cup seat and a suction cup, the lifting guide column is located in the corresponding first guide through hole, the suction cup seat is installed at the lower end of the lifting guide column, the suction cup is installed on the suction cup seat, the compression spring is sleeved on the lifting guide column, the lower end of the compression spring can apply a downward force to the suction cup seat, and the upper limit component is installed at the upper end of the lifting guide column and contacts and cooperates with the upper surface of the suction head mounting plate.

2. The aluminum film suction and release mechanism of the lunch box sealing machine according to claim 1 is characterized in that: The lower end and the upper end of the compression spring are in close contact with the top of the suction cup seat and the lower surface of the suction head mounting plate respectively; the suction cup is mounted on the bottom of the suction cup seat.

3. The aluminum film suction and release mechanism of the lunch box sealing machine according to claim 2 is characterized in that: A plurality of upper limit grooves with notches facing downward are provided on the lower surface of the suction head mounting plate. The number of the upper limit grooves is the same as that of the first guide through holes and they correspond one to one. The upper limit grooves are located below the first guide through holes. The upper end of the compression spring is located in the upper limit groove and in close contact with the bottom of the upper limit groove.

4. The aluminum film suction and release mechanism of the lunch box sealing machine according to claim 2 is characterized in that: The top of the suction cup seat is provided with a lower limiting groove with a notch facing upwards, and the lower end of the compression spring is located in the lower limiting groove and in close contact with the groove bottom of the lower limiting groove.

5. The aluminum film suction and release mechanism of the lunch box sealing machine according to claim 1 is characterized in that: The upper end of the lifting guide column is provided with an external thread section, and the upper limit component is provided with a screw hole, and the upper limit component is installed on the external thread section through the screw hole.

6. The aluminum film suction and release mechanism of the lunch box sealing machine according to any one of claims 1 to 5, characterized in that: The suction head rack also includes a rack body and a suction head mounting plate lifting mechanism capable of driving the suction head mounting plate to lift and lower, and the suction head mounting plate lifting mechanism is installed on the rack body.

7. The aluminum film suction and release mechanism of the lunch box sealing machine according to claim 6 is characterized by: The suction head mounting plate lifting mechanism comprises a suction head mounting plate lifting cylinder, which is installed on the frame, and the piston rod of the suction head mounting plate lifting cylinder faces downward and is connected to the suction head mounting plate.

8. The aluminum film suction and release mechanism of the lunch box sealing machine according to any one of claims 1 to 5, characterized in that: The lifting guide column is provided with a first gas channel, and the suction cup seat is provided with a second gas channel, and the second gas channel connects the cavity of the suction cup with the lower end of the first gas channel.

9. The aluminum film suction and release mechanism of the lunch box sealing machine according to any one of claims 1 to 5, characterized in that: The position switching mechanism of the tip rack comprises a flip servo motor, a reducer, a flip shaft, a flip bracket, a tip rack support shaft, a driving pulley, a transmission belt and a driven pulley; the flip servo motor and the reducer are fixedly mounted on the frame, the flip shaft is rotatably mounted on the frame, the power output shaft of the flip servo motor is transmission-connected with the power input shaft of the reducer, the power output shaft of the reducer is transmission-connected with one end of the flip shaft, the flip bracket is fixedly mounted on the flip shaft, the tip rack support shaft is rotatably mounted on the flip bracket, the tip rack support shaft and the flip shaft are parallel to each other, the tip rack is mounted on the tip rack support shaft, the driving pulley is fixedly mounted on the flip shaft, the driven pulley is fixedly mounted on the tip rack support shaft, the driving pulley is transmission-connected with the driven pulley through a transmission belt, and the transmission ratio between the driving pulley and the driven pulley is 1.

10. The aluminum film suction and release mechanism of the lunch box sealing machine according to any one of claims 1 to 5, characterized in that: The suction head rack position switching mechanism includes a lifting mechanism, a lifting seat, a translation mechanism and a translation seat, the lifting mechanism is installed on the frame and can drive the lifting seat to lift, the translation mechanism is installed on the lifting seat and can drive the translation seat to translate, and the suction head rack is installed on the translation seat; Alternatively, the tip rack position switching mechanism includes a translation mechanism, a translation seat, a lifting mechanism and a lifting seat, the translation mechanism is installed on the frame and can drive the translation seat to translate, the lifting mechanism is installed on the translation seat and can drive the lifting seat to rise and fall, and the tip rack is installed on the lifting seat.

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