A case opening device and a control method thereof

Abstract

The application discloses a box opening device and a control method thereof. The box opening device comprises a suction disc group, a positive pressure pipeline, a negative pressure pipeline, a positive and negative pressure switch valve group, a vacuum breaking valve group and a control unit. The suction disc group is in communication with the positive pressure pipeline and the negative pressure pipeline respectively. The positive and negative pressure switch valve group is arranged on the connecting air path of the suction disc group and the positive pressure pipeline and on the connecting air path of the suction disc group and the negative pressure pipeline. The vacuum breaking valve group is arranged on the positive pressure pipeline. The control unit is in communication connection with the positive and negative pressure switch valve group and the vacuum breaking valve group respectively. The technical scheme of the application sets the suction disc group, the positive pressure pipeline, the negative pressure pipeline, the positive and negative pressure switch valve group, the vacuum breaking valve group and the control unit, and through the cooperative working mechanism, it can ensure that the suction disc group can accurately and stably suck the to-be-opened box body in the box opening process and complete the box opening forming action. Meanwhile, the design of the valve group on the pipeline improves the stability of the air pressure of the box opening device and improves the box opening efficiency.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment technology, and in particular to an unpacking device and its control method. Background Technology

[0002] The YP13 carton sealing machine, a side-opening type, plays a crucial role in cigarette packaging production lines. It primarily uses a cam-linkage mechanism in conjunction with a pneumatic system to suck up and open the carton. However, the existing pneumatic control method is poorly designed, leading to unstable system pressure and severely impacting the overall operating efficiency and stability of the equipment. Furthermore, the machine experiences prolonged vacuum breaking time during operation, resulting in significant energy waste. Summary of the Invention

[0003] This invention provides a box-opening device and its control method to solve the problems of unstable air pressure, long vacuum breaking time, and low efficiency of existing box-opening devices.

[0004] According to a first aspect of the present invention, an unpacking device is provided, comprising: a suction cup assembly, a positive pressure pipeline, a negative pressure pipeline, a positive and negative pressure switching valve assembly, a vacuum breaking valve assembly, and a control unit;

[0005] The suction cup assembly is connected to both the positive pressure pipeline and the negative pressure pipeline; the positive and negative pressure switch valve assembly is located on the connecting air line between the suction cup assembly and the positive pressure pipeline, and also on the connecting air line between the suction cup assembly and the negative pressure pipeline; the vacuum breaking valve assembly is located on the positive pressure pipeline;

[0006] The control unit is communicatively connected to the positive and negative pressure switching valve group and the vacuum breaking valve group, respectively. It is used to control the positive and negative pressure switching valve group to conduct the suction cup group and the negative pressure pipeline, so that the suction cup group generates negative pressure to adsorb the box to be opened. The control unit is also used to control the positive and negative pressure switching valve group to conduct the suction cup group and the positive pressure pipeline after the box to be opened is opened, and at the same time control the vacuum breaking valve group to open, so that the suction cup group generates positive pressure to stop adsorbing the box to be opened.

[0007] Optionally, the suction cup assembly includes a bottom suction cup, a front suction cup, and a rear suction cup;

[0008] The positive and negative pressure switching valve assembly includes a first positive and negative pressure switching valve, a second positive and negative pressure switching valve, and a third positive and negative pressure switching valve; the vacuum breaking valve assembly includes a first vacuum breaking valve, a second vacuum breaking valve, and a third vacuum breaking valve;

[0009] The first positive and negative pressure switching valve is located on the connecting air line between the bottom suction cup and the positive pressure pipeline, and also on the connecting air line between the bottom suction cup and the negative pressure pipeline; the first vacuum breaking valve is located on the positive pressure pipeline;

[0010] The second positive and negative pressure switching valve is located on the connecting air line between the front suction cup and the positive pressure line, and also on the connecting air line between the front suction cup and the negative pressure line; the second vacuum breaking valve is located on the positive pressure line;

[0011] The third positive and negative pressure switch valve is located on the connecting air line between the rear suction cup and the positive pressure line, and also on the connecting air line between the rear suction cup and the negative pressure line; the third vacuum breaking valve is located on the positive pressure line;

[0012] The control unit is used to control the first positive and negative pressure switch valve to open the bottom suction cup and the negative pressure pipeline so that the bottom suction cup can adhere to the bottom surface of the box to be opened; it is also used to control the front suction cup and the negative pressure pipeline and the rear suction cup and the negative pressure pipeline to open the box to be opened when the box to be opened moves to a specific position so that the front suction cup and the rear suction cup can adhere to the side of the box to be opened, thereby opening the box to be opened; it is also used to control the third positive and negative pressure switch valve to open the rear suction cup and the positive pressure pipeline after the box to be opened is opened, and at the same time control the first vacuum breaking valve to open within a first preset time.

[0013] Optionally, the control unit is also connected in communication with the packing device and is also used to control the second positive and negative pressure switch valve to open the front suction cup and the positive pressure pipeline when the packing device first transports the packing material into the box to be opened, and at the same time control the second vacuum breaking valve to open within a second preset time; it is also used to control the first positive and negative pressure switch valve to open the bottom suction cup and the positive pressure pipeline after the packing device has finished packing, and at the same time control the first vacuum breaking valve to open within a third preset time.

[0014] Optionally, the first vacuum breaking valve, the second vacuum breaking valve, and the third vacuum breaking valve are all two-position two-way solenoid valves;

[0015] The first end of the first vacuum breaking valve is connected to the bottom suction cup, and the second end is connected to the compressed air source of the positive pressure pipeline.

[0016] The first end of the second vacuum breaking valve is connected to the front suction cup, and the second end is connected to the compressed air source of the positive pressure pipeline.

[0017] The first end of the third vacuum breaking valve is connected to the rear suction cup, and the second end is connected to the compressed air source of the positive pressure pipeline.

[0018] Optionally, the first positive and negative pressure switching valve, the second positive and negative pressure switching valve, and the third positive and negative pressure switching valve are all two-position five-way solenoid valves;

[0019] The first end of the first positive and negative pressure switching valve is connected to the bottom suction cup, the second end is connected to the positive pressure pipeline, and the third end is connected to the negative pressure pipeline.

[0020] The first end of the second positive and negative pressure switch valve is connected to the front suction cup, the second end is connected to the positive pressure pipeline, and the third end is connected to the negative pressure pipeline.

[0021] The first end of the third positive and negative pressure switch valve is connected to the rear suction cup, the second end is connected to the positive pressure pipeline, and the third end is connected to the negative pressure pipeline.

[0022] Optionally, a linkage mechanism may also be included;

[0023] The suction cup assembly is fixedly connected to the linkage mechanism; the control unit is communicatively connected to the linkage mechanism to control the movement of the linkage mechanism, thereby driving the suction cup assembly to move to a preset position.

[0024] According to a second aspect of the present invention, a control method for an unpacking device is provided, which is applied in the unpacking device; the control method includes:

[0025] The positive and negative pressure switch valve group controls the suction cup group and the negative pressure pipeline to generate negative pressure in the suction cup group to adsorb the box to be opened;

[0026] After the box to be opened is opened, the positive and negative pressure switch valve group is controlled to connect the suction cup group and the positive pressure pipeline, and at the same time the vacuum breaking valve group is controlled to open, so that the suction cup group generates positive pressure to stop adsorbing the box to be opened.

[0027] Optionally, the suction cup assembly includes a bottom suction cup, a front suction cup, and a rear suction cup; the positive and negative pressure switching valve assembly includes a first positive and negative pressure switching valve, a second positive and negative pressure switching valve, and a third positive and negative pressure switching valve; the vacuum breaking valve assembly includes a first vacuum breaking valve, a second vacuum breaking valve, and a third vacuum breaking valve.

[0028] Controlling the positive and negative pressure switching valve assembly to connect the suction cup assembly and the negative pressure pipeline includes:

[0029] Control the first positive and negative pressure switch valve to connect the bottom suction cup and the negative pressure pipeline so that the bottom suction cup can adhere to the bottom surface of the box to be opened;

[0030] When the box to be opened moves to a specific position, the control connects the front suction cup and the negative pressure pipeline, as well as the rear suction cup and the negative pressure pipeline, so that the front suction cup and the rear suction cup can adhere to the side of the box to be opened, thereby opening the box to be opened.

[0031] After the box to be opened is opened, the positive and negative pressure switch valve group is activated to connect the suction cup group and the positive pressure pipeline, and the vacuum breaking valve group is activated simultaneously, including:

[0032] After the box to be opened is opened, the third positive and negative pressure switch valve is controlled to connect the rear suction cup and the positive pressure pipeline, and at the same time the first vacuum breaking valve is controlled to open within the first preset time.

[0033] Optionally, the control unit is also in communication with the packing device;

[0034] After the box to be opened is opened, the third positive and negative pressure switch valve is controlled to connect the rear suction cup and the positive pressure pipeline. At the same time, the first vacuum breaking valve is controlled to open within a first preset time. This also includes:

[0035] When the packing device first transports the packing material into the box to be opened, the second positive and negative pressure switch valve is controlled to open the rear suction cup and the positive pressure pipeline, and the second vacuum breaking valve is controlled to open within a second preset time.

[0036] After the packing device completes the packing, the first positive and negative pressure switch valve is controlled to connect the rear suction cup and the positive pressure pipeline, and the first vacuum breaking valve is controlled to open within a third preset time.

[0037] Optionally, the unpacking device may also include a linkage mechanism;

[0038] The control of the positive and negative pressure switching valve group to connect the suction cup group and the negative pressure pipeline, so that the suction cup group generates negative pressure to adsorb the box to be opened, also includes:

[0039] Control the linkage mechanism to move the suction cup assembly to a preset position.

[0040] The technical solution of this invention, by setting up a suction cup assembly, a positive pressure pipeline, a negative pressure pipeline, a positive and negative pressure switching valve assembly, a vacuum breaking valve assembly, and a control unit, allows the positive and negative pressure switching valve assembly to conduct the suction cup assembly and the negative pressure pipeline, thereby enabling the suction cup assembly to adsorb and unfold the box to be opened. After the box to be opened is opened, the positive and negative pressure switching valve assembly and the vacuum breaking valve assembly are controlled to conduct the suction cup assembly and the positive pressure pipeline, releasing the box to be opened. Through this collaborative working mechanism, it can be ensured that during the box opening process, the suction cup assembly can accurately and stably pick up the box to be opened and complete the box opening and forming action; at the same time, the design of the valve assembly on the pipeline improves the stability of the air pressure of the box opening device and improves the box opening efficiency.

[0041] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the operation of an unpacking device according to an embodiment of the present invention;

[0044] Figure 2 This is a schematic diagram of the air circuit connection of an unpacking device according to an embodiment of the present invention;

[0045] Figure 3 This is a schematic diagram of the communication connection of an unpacking device according to an embodiment of the present invention;

[0046] Figure 4 This is a schematic diagram of a control method for a first type of unpacking device provided according to an embodiment of the present invention;

[0047] Figure 5 This is a schematic diagram of a control method for a second type of unpacking device provided according to an embodiment of the present invention;

[0048] Figure 6 This is a schematic diagram of a control method for a third type of unpacking device provided according to an embodiment of the present invention;

[0049] Figure 7 This is a schematic diagram of a control method for a fourth type of unpacking device provided according to an embodiment of the present invention. Detailed Implementation

[0050] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0051] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0052] Figure 1 This is a schematic diagram of the operation of an unpacking device according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the air circuit connection of an unpacking device according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the communication connection of an unpacking device according to an embodiment of the present invention. Figure 1 , Figure 2 and Figure 3 As shown, the unpacking device includes: suction cup assembly 1, positive pressure pipeline 2, negative pressure pipeline 3, positive and negative pressure switch valve assembly 4, vacuum breaking valve assembly 5, and control unit 6;

[0053] The suction cup assembly 1 is connected to the positive pressure pipeline 2 and the negative pressure pipeline 3 respectively; the positive and negative pressure switch valve assembly 4 is set on the connecting air line between the suction cup assembly 1 and the positive pressure pipeline 2 and on the connecting air line between the suction cup assembly 1 and the negative pressure pipeline 3; the vacuum breaking valve assembly 5 is set on the positive pressure pipeline 2;

[0054] The control unit 6 is communicatively connected to the positive and negative pressure switch valve group 4 and the vacuum breaking valve group 5, respectively. It is used to control the positive and negative pressure switch valve group 4 to conduct the suction cup group 1 and the negative pressure pipeline 3, so that the suction cup group 1 generates negative pressure to adsorb the box 7 to be opened. The control unit 6 is also used to control the positive and negative pressure switch valve group 4 to conduct the suction cup group 1 and the positive pressure pipeline 2 after the box 7 to be opened is opened, and at the same time control the vacuum breaking valve group 5 to open, so that the suction cup group 1 generates positive pressure to stop adsorbing the box 7 to be opened.

[0055] Among them, the suction cup assembly 1 can be used to adsorb the box 7 to be opened. It can pull the box 7 to be opened into shape by adsorption force on different surfaces of the box 7, thereby completing the box opening and shaping action of the box 7 to be opened.

[0056] The suction cup assembly 1 is connected to the positive pressure pipeline 2 and the negative pressure pipeline 3 respectively. The positive pressure pipeline 2 can be used to supply compressed air to the suction cup assembly 1, so that positive pressure is generated in the suction cup assembly 1 to release the box 7 to be opened. The negative pressure pipeline 3 can be used to provide negative pressure to the suction cup assembly 1 to adsorb the box 7 to be opened.

[0057] The positive and negative pressure switch valve group 4 is set on the connecting air line between the suction cup group 1 and the positive pressure pipeline 2, and also on the connecting air line between the suction cup group 1 and the negative pressure pipeline 3. The control unit 6 is communicatively connected to the positive and negative pressure switch valve group 4. The control unit 6 can switch the suction cup group 1 to be connected to the positive pressure pipeline 2 and the suction cup group 1 to be connected to the negative pressure pipeline 3 by controlling the positive and negative pressure switch valve group 4, thereby completing the adsorption control of the suction cup group 1 on the box 7 to be opened.

[0058] Among them, the vacuum breaking valve group 5 is installed on the positive pressure pipeline 2. When the control unit 6 controls the positive and negative pressure switch valve group 4 to make the suction cup group 1 and the positive pressure pipeline 2 connected, it simultaneously controls the vacuum breaking valve group 5 to be connected, thereby allowing the air pressure source to enter the suction cup group 1, causing the suction cup group 1 to release the box 7 to be opened.

[0059] Specifically, firstly, the control unit 6 controls the suction cup assembly 1 to move to the box 7 to be opened and controls the positive and negative pressure switch valve assembly 4 to open the suction cup assembly 1 and the negative pressure pipeline 3, so that a negative pressure is generated in the suction cup assembly 1, which adsorbs the box 7 to be opened. By applying suction force to different surfaces of different boxes 7, the suction cup assembly 1 pulls the box 7 open and shapes it. After the box 7 is opened, the positive and negative pressure switch valve assembly 4 is controlled to open the suction cup assembly 1 and the positive pressure pipeline 2, and at the same time, the vacuum breaking valve assembly 5 is controlled to open, and the compressed air source enters the suction cup assembly 1, generating positive pressure in the suction cup assembly 1, releasing the box 7 to be opened, thus completing the opening action.

[0060] It is understandable that, in addition to the negative pressure pipeline 3 adsorbing the box 7 to be opened, a positive pressure pipeline 2 is also provided. The box 7 to be opened is released through the positive pressure pipeline 2, avoiding the problem that the suction cup assembly 1 cannot detach from the box 7 for a short time due to the residual vacuum caused by only closing the negative pressure pipeline 3. By setting up the positive pressure pipeline 2, the suction cup assembly 1 can become positive pressure at the same time as the negative pressure pipeline 3 is closed, so that the suction cup assembly 1 can immediately release the box 7 to be opened, shortening the vacuum breaking time of the suction cup assembly 1 and improving the opening efficiency. At the same time, in this embodiment of the invention, the positive pressure pipeline 2 and the negative pressure pipeline 3 are two independent pipelines. The switching between the positive pressure pipeline 2-suction cup assembly 1 and the negative pressure pipeline 3-suction cup assembly 1 is realized by setting a positive and negative pressure switching valve assembly 4, ensuring that during the opening process, the suction cup assembly 1 can accurately and stably pick up the box 7 to be opened and complete the opening and forming action. In addition, the vacuum breaking valve assembly 5 is installed on the positive pressure pipeline 2, which isolates the positive and negative pressure switch valve assembly 4 from the compressed air source. This avoids the problem that the system pressure will drop due to the large amount of positive pressure released instantaneously during vacuum breaking, which in turn causes unstable air pressure and affects the working performance.

[0061] The technical solution of this invention, through the arrangement of a suction cup assembly, a positive pressure pipeline, a negative pressure pipeline, a positive and negative pressure switching valve assembly, a vacuum breaking valve assembly, and a control unit, allows the positive and negative pressure switching valve assembly to connect the suction cup assembly and the negative pressure pipeline, thereby enabling the suction cup assembly to adsorb and unfold the box to be opened. After the box is opened, the positive and negative pressure switching valve assembly and the vacuum breaking valve assembly are controlled to connect the suction cup assembly and the positive pressure pipeline, releasing the box to be opened. Through this collaborative mechanism, it can be ensured that during the opening process, the suction cup assembly can accurately and stably pick up the box to be opened and complete the opening and shaping action. At the same time, the design of the valve assembly on the pipeline improves the stability of the air pressure of the opening device and improves the opening efficiency.

[0062] Optional, continue to refer to Figure 1 , Figure 2 and Figure 3 As shown, the suction cup assembly 1 includes a bottom suction cup 11, a front suction cup 12, and a rear suction cup 13;

[0063] The positive and negative pressure switching valve assembly 4 includes a first positive and negative pressure switching valve 41, a second positive and negative pressure switching valve 42, and a third positive and negative pressure switching valve 43; the vacuum breaking valve assembly 5 includes a first vacuum breaking valve 51, a second vacuum breaking valve 52, and a third vacuum breaking valve 53;

[0064] The first positive and negative pressure switching valve 41 is installed on the connecting air line between the bottom suction cup 11 and the positive pressure line 2, and also on the connecting air line between the bottom suction cup 11 and the negative pressure line 3; the first vacuum breaking valve 51 is installed on the positive pressure line 2;

[0065] The second positive and negative pressure switching valve 42 is installed on the connecting air line between the front suction cup 12 and the positive pressure line 2, and also on the connecting air line between the front suction cup 12 and the negative pressure line 3; the second vacuum breaking valve 52 is installed on the positive pressure line 2;

[0066] The third positive and negative pressure switch valve 43 is installed on the connecting air line between the rear suction cup 13 and the positive pressure line 2, and is also installed on the connecting air line between the rear suction cup 13 and the negative pressure line 3; the third vacuum breaking valve 53 is installed on the positive pressure line 2.

[0067] The control unit 6 is used to control the first positive and negative pressure switch valve 41 to connect the bottom suction cup 11 and the negative pressure pipeline 3 so that the bottom suction cup 11 can adsorb the bottom surface of the box 7 to be opened; it is also used to control the connection of the front suction cup 12 and the negative pressure pipeline 3 and the rear suction cup 13 and the negative pressure pipeline 3 when the box 7 to be opened moves to a specific position so that the front suction cup 12 and the rear suction cup 13 can adsorb the side of the box 7 to be opened, thereby opening the box 7 to be opened; it is also used to control the third positive and negative pressure switch valve 43 to connect the rear suction cup 13 and the positive pressure pipeline 2 after the box 7 to be opened is opened, and at the same time control the first vacuum breaking valve 51 to open within a first preset time.

[0068] The bottom suction cup 11, the front suction cup 12, and the rear suction cup 13 can be used to adsorb different positions of the box 7 to be opened. The bottom suction cup 11 can be used to adsorb the bottom surface of the box 7 to be opened, the front suction cup 12 can be used to adsorb the first position of the side of the box 7 to be opened, and the rear suction cup 13 can be used to adsorb the second position of the side of the box 7 to be opened. By using different adsorption positions, when the suction cup group 1 acts on the box 7 to be opened at the same time, the box 7 to be opened can be pulled open and formed.

[0069] Specifically, the first positive and negative pressure switching valve 41, the second positive and negative pressure switching valve 42, and the third positive and negative pressure switching valve 43 correspond to the switching valves of the positive pressure pipeline 2 and negative pressure pipeline 3 of the bottom suction cup 11, the front suction cup 12, and the rear suction cup 13, respectively. The first vacuum breaking valve 51, the second vacuum breaking valve 52, and the third vacuum breaking valve 53 correspond to the conducting valves of the positive pressure pipeline 2 of the bottom suction cup 11, the front suction cup 12, and the rear suction cup 13, respectively. The first positive and negative pressure switch valve 41 is located on the connecting air line between the bottom suction cup 11 and the positive pressure line 2, and also on the connecting air line between the bottom suction cup 11 and the negative pressure line 3. By controlling the first positive and negative pressure switch valve 41, the connection between the bottom suction cup 11 and the positive pressure line 2 or the negative pressure line 3 can be controlled. The second positive and negative pressure switch valve 42 is located on the connecting air line between the front suction cup 12 and the positive pressure line 2, and also on the connecting air line between the front suction cup 12 and the negative pressure line 3. By controlling the second positive and negative pressure switch valve 42, the connection between the front suction cup 12 and the positive pressure line 2 or the negative pressure line 3 can be controlled. The third positive and negative pressure switch valve 43 is located on the connecting air line between the rear suction cup 13 and the positive pressure line 2, and also on the connecting air line between the rear suction cup 13 and the negative pressure line 3. By controlling the third positive and negative pressure switch valve 43, the connection between the rear suction cup 13 and the positive pressure line 2 or the negative pressure line 3 can be controlled. By controlling the first vacuum breaking valve 51, the second vacuum breaking valve 52 and the third vacuum breaking valve 53, the compressed air source on the positive pressure pipeline 2 can be connected to the corresponding suction cup, thereby completing the release of the box to be opened 7.

[0070] For example, the compressed air source includes one unit, which is connected to the corresponding bottom suction cup 11, front suction cup 12, and rear suction cup 13 via a distribution valve; the vacuuming side is also connected to the corresponding bottom suction cup 11, front suction cup 12, and rear suction cup 13 via a distribution valve. Positive pressure lines 2 are respectively provided between the compressed air source and the bottom suction cup 11, front suction cup 12, and rear suction cup 13, and negative pressure lines 3 are respectively provided between the vacuuming side and the bottom suction cup 11, front suction cup 12, and rear suction cup 13. A first positive and negative pressure switching valve 41 and a first vacuum breaking valve 51 are installed on the positive pressure pipeline 2 between the bottom suction cup 11 and the compressed air source; a first positive and negative pressure switching valve 41 is installed on the negative pressure pipeline 3 between the bottom suction cup 11 and the compressed air source; a second positive and negative pressure switching valve 42 and a second vacuum breaking valve 52 are installed on the positive pressure pipeline 2 between the front suction cup 12 and the compressed air source; a second positive and negative pressure switching valve 42 is installed on the negative pressure pipeline 3 between the front suction cup 12 and the compressed air source; a third positive and negative pressure switching valve 43 and a third vacuum breaking valve 53 are installed on the positive pressure pipeline 2 between the rear suction cup 13 and the compressed air source; a third positive and negative pressure switching valve 43 is installed on the negative pressure pipeline 3 between the rear suction cup 13 and the compressed air source.

[0071] When the control unit 6 performs control, it first controls the suction cup assembly 1 to move to the box 7 to be opened and controls the first positive and negative pressure switch valve 41 to open the bottom suction cup 11 and the negative pressure pipeline 3, so that the bottom suction cup 11 adsorbs the bottom surface of the box 7 to be opened. During this process, the bottom suction cup 11 can be moved to move the box 7 to a specific position, such as the packing position. When the box 7 to be opened moves to the specific position, the control unit controls the opening of the front suction cup 12 and the negative pressure pipeline 3, as well as the rear suction cup 13 and the negative pressure pipeline 3, so that the front suction cup 12 and the rear suction cup 13 adsorb the sides of the box 7 to be opened, so that both the bottom and the sides have suction force, thereby opening the box 7 to be opened. After the box 7 to be opened is opened, the control unit controls the third positive and negative pressure switch valve 43 to open the rear suction cup 13 and the positive pressure pipeline 2, and at the same time controls the first vacuum breaking valve 51 to open within a first preset time, so that the rear suction cup 13 releases the box 7 to be opened, and the subsequent packing steps are carried out.

[0072] Understandably, after the box 7 to be opened is opened, only the bottom suction cup 11 and the front suction cup 12 are needed to ensure that the box 7 can be opened for subsequent packing steps. The rear suction cup 13 does not need to continue to work, so the rear suction cup 13 can be closed. The first preset time can be the time set by the system to achieve the purpose of breaking the vacuum, ensuring that the rear suction cup 13 releases the box 7 to be opened.

[0073] The technical solution of this invention, by setting a bottom suction cup, a front suction cup, and a rear suction cup in the suction cup assembly, and correspondingly setting a first positive and negative pressure switching valve, a second positive and negative pressure switching valve, and a third positive and negative pressure switching valve, as well as a first vacuum breaking valve, a second vacuum breaking valve, and a third vacuum breaking valve, enables the suction cups to pick up carton skin more stably and accurately through coordinated control of the bottom suction cup, the front suction cup, and the rear suction cup, thereby improving the success rate of opening the carton; at the same time, by precisely controlling the switching of positive and negative pressure and the opening and closing of the positive pressure air path, the impact of air pressure fluctuations on equipment operation is reduced, and energy is saved, thereby improving packaging efficiency.

[0074] Optional, continue to refer to Figure 1 , Figure 2 and Figure 3 As shown, the control unit 6 is also connected in communication with the packing device 9, and is also used to control the second positive and negative pressure switch valve 42 to open the front suction cup 12 and the positive pressure pipeline 2 when the packing device 9 first transports the packing material into the box to be opened 7, and at the same time control the second vacuum breaking valve 52 to open within a second preset time; it is also used to control the first positive and negative pressure switch valve 41 to open the bottom suction cup 11 and the positive pressure pipeline 2 after the packing device 9 has finished packing, and at the same time control the first vacuum breaking valve 51 to open within a third preset time.

[0075] The packing device 9 can be a separate structure from the unpacking device. It can be used to load packing materials into the box 7 to complete the packaging. After the box 7 is opened, the packing process continues. The control unit 6 is also connected to the packing device 9. When the packing device 9 first loads the packing materials into the box 7, the packing materials provide some support to the box 7. Therefore, the suction cup 12 can be released to hold the box 7. The second positive and negative pressure switch valve 42 is controlled to open the front suction cup 12 and the positive pressure pipeline 2. At the same time, the second vacuum breaking valve 52 is controlled to open within a second preset time to break the vacuum of the front suction cup 12 for a second preset time. After the packing device 9 finishes packing, the first positive and negative pressure switch valve 41 is controlled to open the bottom suction cup 11 and the positive pressure pipeline 2. At the same time, the first vacuum breaking valve 51 is controlled to open within a third preset time to release the box from the bottom suction cup 11, thus completing the unpacking and packing process.

[0076] For example, S1, the control unit 6 controls the bottom suction cup 11 to move to the suction box position, and controls the first positive and negative pressure switch valve 41 to be energized to connect the negative pressure air circuit, and the bottom suction cup 11 adsorbs the bottom surface of the box to be opened 7 to complete the box retrieval action.

[0077] S2, the control unit 6 controls the bottom suction cup 11 to move, thereby driving the box 7 to be opened to continue moving downwards to a specific position. At the same time, after the front suction cup 12 and the rear suction cup 13 approach the side of the box 7 to be opened, the second positive and negative pressure switch valve 42 and the third positive and negative pressure switch valve 43 are simultaneously energized, and the negative pressure air circuit is connected. The front suction cup 12 and the rear suction cup 13 simultaneously adhere to the side of the box 7 to be opened. At this time, the bottom suction cup 11, the front suction cup 12 and the rear suction cup 13 can continue to move until they pull the box 7 to be opened open and form it.

[0078] S3. After the box 7 is successfully opened, the first positive and negative pressure switch valve 41 and the second positive and negative pressure switch valve 42 remain energized, the negative pressure air path is open, and the box is kept open while waiting for loading. The third positive and negative pressure switch valve 43 is de-energized and closes the negative pressure, the rear suction cup 13 breaks the vacuum, the third vacuum breaking valve 53 is energized and connects the positive pressure air path, and after a 50ms delay, the rear suction cup 13 breaks the vacuum and the third vacuum breaking valve 53 is de-energized and closes the positive pressure air blowing.

[0079] S4. When the packing device 9 pushes the specified amount of packing material into the box to be opened 7 for the first time, after the packing push action is completed, the second positive and negative pressure switch valve 42 is de-energized and closes the negative pressure air circuit. At the same time, the second vacuum breaking valve 52 is energized and connects the positive pressure air circuit. After a delay of 50ms, the second vacuum breaking valve 52 is de-energized and closes the positive pressure blowing.

[0080] S5. After the packing is completed, the first positive and negative pressure switch valve 41 loses power and closes the negative pressure air circuit. At the same time, the first vacuum breaking valve 51 is energized and connects the positive pressure air circuit. After a delay of 100ms, the first vacuum breaking valve 51 loses power and closes the positive pressure blowing, thus completing the entire unpacking and packing process.

[0081] It is understandable that the first, second, and third preset times can be the same or different, depending on the action of the corresponding suction cup and the effect of breaking the vacuum.

[0082] The technical solution of this invention involves a control unit that, based on the connection of the packing device, allows the unpacking device to cooperate with the packing device to pack the boxes to be opened, thus completing the unpacking and packing process. By precisely controlling the switching of positive and negative pressure and the opening and closing of the positive pressure air path, the impact of air pressure fluctuations on equipment operation is reduced, energy is saved, and packaging efficiency is improved.

[0083] Optional, continue to refer to Figure 1 , Figure 2 and Figure 3 As shown, the first vacuum breaking valve 51, the second vacuum breaking valve 52, and the third vacuum breaking valve 53 are all two-position two-way solenoid valves;

[0084] The first end of the first vacuum breaking valve 51 is connected to the bottom suction cup 11, and the second end is connected to the air source of the positive pressure pipeline 2.

[0085] The first end of the second vacuum breaking valve 52 is connected to the front suction cup 12, and the second end is connected to the air source of the positive pressure pipeline 2.

[0086] The first end of the third vacuum valve 53 is connected to the rear suction cup 13, and the second end is connected to the compressed air source of the positive pressure pipeline 2.

[0087] The two-position two-way solenoid valve has only two working states. In the closed state, the first and second ends are cut off, preventing gas from passing through; in the open state, the first and second ends are connected, allowing gas to pass through. The first vacuum breaking valve 51 has its first end connected to the bottom suction cup 11 and its second end connected to the compressed air source of the positive pressure pipeline 2. Controlling the opening and closing of the first vacuum breaking valve 51 controls the opening and closing of the compressed air source. The second vacuum breaking valve 52 has its first end connected to the front suction cup 12 and its second end connected to the compressed air source of the positive pressure pipeline 2. Controlling the opening and closing of the second vacuum breaking valve 52 controls the opening and closing of the compressed air source. The third vacuum breaking valve 53 has its first end connected to the rear suction cup 13 and its second end connected to the compressed air source of the positive pressure pipeline 2. Controlling the opening and closing of the third vacuum breaking valve 53 controls the opening and closing of the compressed air source.

[0088] The technical solution of this invention, by setting the first vacuum breaking valve, the second vacuum breaking valve and the third vacuum breaking valve as two-position two-way solenoid valves, achieves precise control of the compressed air source, ensures the isolation between the compressed air source and the positive and negative pressure switching valve group, and improves the air pressure stability.

[0089] Optional, continue to refer to Figure 1 , Figure 2 and Figure 3 As shown, the first positive and negative pressure switching valve 41, the second positive and negative pressure switching valve 42, and the third positive and negative pressure switching valve 43 are all two-position five-way solenoid valves;

[0090] The first end of the first positive and negative pressure switching valve 41 is connected to the bottom suction cup 11, the second end is connected to the positive pressure pipeline 2, and the third end is connected to the negative pressure pipeline 3.

[0091] The first end of the second positive and negative pressure switching valve 42 is connected to the front suction cup 12, the second end is connected to the positive pressure pipeline 2, and the third end is connected to the negative pressure pipeline 3.

[0092] The first end of the third positive and negative pressure switching valve 43 is connected to the rear suction cup 13, the second end is connected to the positive pressure pipeline 2, and the third end is connected to the negative pressure pipeline 3.

[0093] The 2-position 5-way solenoid valve can be a solenoid valve with two operating states and five ports. By controlling the opening of the 2-position 5-way solenoid valve, the first and second ports can be connected; by controlling the closing of the 2-position 5-way solenoid valve, the first and third ports can be connected.

[0094] Specifically, the first end of the first positive and negative pressure switching valve 41 is connected to the bottom suction cup 11, the second end is connected to the positive pressure pipeline 2, and the third end is connected to the negative pressure pipeline 3. When the first positive and negative pressure switching valve 41 is energized, the first end and the third end are connected, enabling the bottom suction cup 11 to connect with the negative pressure pipeline 3; when the first positive and negative pressure switching valve 41 is de-energized, the first end and the second end are connected, enabling the bottom suction cup 11 to connect with the positive pressure pipeline 2. The first end of the second positive and negative pressure switching valve 42 is connected to the front suction cup 12, the second end is connected to the positive pressure pipeline 2, and the third end is connected to the negative pressure pipeline 3. When the second positive and negative pressure switching valve 42 is energized, the first end and the third end are connected, enabling the front suction cup 12 to connect with the negative pressure pipeline 3; when the second positive and negative pressure switching valve 42 is de-energized, the first end and the second end are connected, enabling the front suction cup 12 to connect with the positive pressure pipeline 2. The first end of the third positive and negative pressure switch valve 43 is connected to the rear suction cup 13, the second end is connected to the positive pressure pipeline 2, and the third end is connected to the negative pressure pipeline 3. When the third positive and negative pressure switch valve 43 is energized, the first end and the third end are connected, so that the rear suction cup 13 is connected to the negative pressure pipeline 3. When the third positive and negative pressure switch valve 43 is de-energized, the first end and the second end are connected, so that the rear suction cup 13 is connected to the positive pressure pipeline 2.

[0095] In the technical solution of this invention embodiment, the first positive and negative pressure switching valve, the second positive and negative pressure switching valve, and the third positive and negative pressure switching valve are all two-position five-way solenoid valves, which realizes precise control of positive and negative pipelines, reduces the impact of air pressure fluctuations on equipment operation, and saves energy.

[0096] Optional, continue to refer to Figure 1 , Figure 2 and Figure 3 As shown, it also includes a linkage mechanism 8;

[0097] The suction cup assembly 1 is fixedly connected to the linkage mechanism 8; the control unit 6 is communicatively connected to the linkage mechanism 8 and is used to control the movement of the linkage mechanism 8 so as to drive the suction cup assembly 1 to move to a preset position.

[0098] The linkage mechanism 8 can be a structure that drives the suction cup to move. Specifically, it can include a cam linkage mechanism 8, and the control unit 6 can drive the mechanical cam linkage mechanism 8 through the main shaft to achieve coordinated movement of the suction cup. In some embodiments, the linkage mechanism 8 is also provided with a main shaft encoder, which realizes coordinated control with the positive and negative pressure switch valve group 4 and the vacuum breaking valve group 5 according to the angle change of the main shaft encoder.

[0099] The preset positions may include the suction position of the box to be opened 7, the packing position, etc.

[0100] In some embodiments, multiple sets of linkage mechanisms 8 may be included, each set of linkage mechanisms 8 being connected to a corresponding suction cup, thereby driving the suction cups to move respectively.

[0101] Specifically, the control unit 6 can control the linkage mechanism 8 to move the bottom suction cup 11 to the suction box position, and after suctioning the box 7 to be opened, control the linkage mechanism 8 to move the bottom suction cup 11 to the boxing position. After the suction cup assembly 1 has finished suctioning the box 7 to be opened, the bottom suction cup 11, the front suction cup 12 and the rear suction cup 13 can be moved by controlling the linkage mechanism 8 to pull the box 7 to be opened open and shape it, thus achieving the purpose of opening the box.

[0102] The technical solution of this invention, by setting up a linkage mechanism and controlling the cooperation between the linkage mechanism and the suction cup assembly, realizes the opening and movement of the box to be opened, thereby improving the packaging efficiency of the production line.

[0103] Based on the same inventive concept. Figure 4 This is a schematic diagram of a control method for a first type of unpacking device according to an embodiment of the present invention. The embodiment of the present invention provides a control method for an unpacking device, which is applied in the unpacking device; combined with... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the control methods include:

[0104] S10. Control the positive and negative pressure switch valve group to connect the suction cup group and the negative pressure pipeline so that the suction cup group generates negative pressure to adsorb the box to be opened.

[0105] S11. After the box to be opened is opened, control the positive and negative pressure switch valve group to connect the suction cup group and the positive pressure pipeline, and at the same time control the vacuum breaking valve group to open so that the suction cup group generates positive pressure to stop adsorbing the box to be opened.

[0106] Specifically, firstly, the control unit 6 controls the suction cup assembly 1 to move to the box 7 to be opened and controls the positive and negative pressure switch valve assembly 4 to open the suction cup assembly 1 and the negative pressure pipeline 3, so that a negative pressure is generated in the suction cup assembly 1, which adsorbs the box 7 to be opened. By applying suction force to different surfaces of different boxes 7, the suction cup assembly 1 pulls the box 7 open and shapes it. After the box 7 is opened, the positive and negative pressure switch valve assembly 4 is controlled to open the suction cup assembly 1 and the positive pressure pipeline 2, and at the same time, the vacuum breaking valve assembly 5 is controlled to open, and the compressed air source enters the suction cup assembly 1, generating positive pressure in the suction cup assembly 1, releasing the box 7 to be opened, thus completing the opening action.

[0107] The technical solution of this invention involves a control unit that controls a positive and negative pressure switch valve group to connect the suction cup group and the negative pressure pipeline, thereby enabling the suction cup group to adsorb and unfold the box to be opened. After the box is opened, the positive and negative pressure switch valve group and the vacuum breaking valve group are controlled to connect the suction cup group and the positive pressure pipeline, releasing the box to be opened. Through this collaborative mechanism, it can be ensured that the suction cup group can accurately and stably pick up the box to be opened during the opening process and complete the opening and forming action. At the same time, the design of the valve group on the pipeline improves the stability of the air pressure of the opening device and improves the opening efficiency.

[0108] Based on the above embodiments, Figure 5 This is a schematic diagram of a control method for a second type of unpacking device provided according to an embodiment of the present invention, combined with... Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, suction cup assembly 1 includes a bottom suction cup 11, a front suction cup 12, and a rear suction cup 13; positive and negative pressure switching valve assembly 4 includes a first positive and negative pressure switching valve 41, a second positive and negative pressure switching valve 42, and a third positive and negative pressure switching valve 43; vacuum breaking valve assembly 5 includes a first vacuum breaking valve 51, a second vacuum breaking valve 52, and a third vacuum breaking valve 53; the control method includes:

[0109] S20. Control the first positive and negative pressure switch valve to connect the bottom suction cup and the negative pressure pipeline so that the bottom suction cup can adhere to the bottom surface of the box to be opened.

[0110] S21. When the box to be opened moves to a specific position, control the connection of the front suction cup and the negative pressure pipeline, as well as the rear suction cup and the negative pressure pipeline, so that the front suction cup and the rear suction cup can adhere to the side of the box to be opened, thereby opening the box to be opened.

[0111] S22. After the box to be opened is opened, control the third positive and negative pressure switch valve to connect the rear suction cup and the positive pressure pipeline, and at the same time control the first vacuum breaking valve to open within the first preset time.

[0112] Specifically, when the control unit 6 performs control, it first controls the suction cup assembly 1 to move to the box 7 to be opened and controls the first positive and negative pressure switch valve 41 to open the bottom suction cup 11 and the negative pressure pipeline 3, so that the bottom suction cup 11 adsorbs the bottom surface of the box 7 to be opened. During this process, the bottom suction cup 11 can be moved to move the box 7 to a specific position, such as the packing position. When the box 7 to be opened moves to the specific position, the control unit controls the opening of the front suction cup 12 and the negative pressure pipeline 3, as well as the rear suction cup 13 and the negative pressure pipeline 3, so that the front suction cup 12 and the rear suction cup 13 adsorb the sides of the box 7 to be opened, so that both the bottom and the sides have suction force, thereby opening the box 7 to be opened. After the box 7 to be opened is opened, the control unit controls the third positive and negative pressure switch valve 43 to open the rear suction cup 13 and the positive pressure pipeline 2, and at the same time controls the first vacuum breaking valve 51 to open within a first preset time, so that the rear suction cup 13 releases the box 7 to be opened, and the subsequent packing steps are carried out.

[0113] The technical solution of this invention, through the coordinated control of the bottom suction cup, the front suction cup, and the rear suction cup, enables the suction cup to pick up the carton skin more stably and accurately, thereby improving the success rate of opening the carton; at the same time, by precisely controlling the switching of positive and negative pressure and the opening and closing of the positive pressure air path, the impact of air pressure fluctuations on equipment operation is reduced, and energy is saved, thus improving packaging efficiency.

[0114] Based on the above embodiments, Figure 6 This is a schematic diagram of the control method for the third type of unpacking device provided according to an embodiment of the present invention, combined with... Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the control unit 6 is also communicatively connected to the packing device 9; the control method includes:

[0115] S30. Control the first positive and negative pressure switch valve to connect the bottom suction cup and the negative pressure pipeline so that the bottom suction cup can adhere to the bottom surface of the box to be opened.

[0116] S31. When the box to be opened moves to a specific position, control the connection of the front suction cup and the negative pressure pipeline, as well as the rear suction cup and the negative pressure pipeline, so that the front suction cup and the rear suction cup can adhere to the side of the box to be opened, thereby opening the box to be opened.

[0117] S32. After the box to be opened is opened, control the third positive and negative pressure switch valve to connect the rear suction cup and the positive pressure pipeline, and at the same time control the first vacuum breaking valve to open within the first preset time.

[0118] S33. When the packing device first transports the packing material into the box to be opened, control the second positive and negative pressure switch valve to open the rear suction cup and positive pressure pipeline, and at the same time control the second vacuum breaking valve to open within a second preset time.

[0119] S34. After the packing device completes the packing, control the first positive and negative pressure switch valve to connect the rear suction cup and the positive pressure pipeline, and at the same time control the first vacuum breaking valve to open within a third preset time.

[0120] For example, the control unit 6 controls the bottom suction cup 11 to move to the suction box position and controls the first positive and negative pressure switch valve 41 to be energized and the negative pressure air circuit to be connected. The bottom suction cup 11 adsorbs the bottom surface of the box to be opened 7 to complete the box retrieval action. The control unit 6 controls the bottom suction cup 11 to move, thereby driving the box to be opened 7 to continue to move downward to a specific position. At the same time, after the front suction cup 12 and the rear suction cup 13 approach the side of the box to be opened 7, the control unit 6 controls the second positive and negative pressure switch valve 42 and the third positive and negative pressure switch valve 43 to be energized and the negative pressure air circuit to be connected. The front suction cup 12 and the rear suction cup 13 simultaneously adsorb the side of the box to be opened 7. At this time, the bottom suction cup 11, the front suction cup 12 and the rear suction cup 13 can continue to move until they move to pull the box to be opened 7 open and form it. After the box to be opened 7 is successfully opened, the first positive and negative pressure switch valve 41 and the second positive and negative pressure switch valve 42 are always energized, the negative pressure air circuit is open, and the box is kept open to wait for packing. When the third positive and negative pressure switch valve 43 is de-energized and closes the negative pressure, the rear suction cup 13 breaks the vacuum, and the third vacuum breaking valve 53 is energized and connects the positive pressure air path. After a 50ms delay, the rear suction cup 13 breaks the vacuum, the third vacuum breaking valve 53 is de-energized and closes the positive pressure blowing. When the packing device 9 pushes the specified amount of packing materials into the box to be opened 7 for the first time, after the packing pushing action is completed, the second positive and negative pressure switch valve 42 is de-energized and closes the negative pressure air path. At the same time, the second vacuum breaking valve 52 is energized and connects the positive pressure air path. After a 50ms delay, the second vacuum breaking valve 52 is de-energized and closes the positive pressure blowing. After the packing is completed, the first positive and negative pressure switch valve 41 is de-energized and closes the negative pressure air path. At the same time, the first vacuum breaking valve 51 is energized and connects the positive pressure air path. After a 100ms delay, the first vacuum breaking valve 51 is de-energized and closes the positive pressure blowing. This completes the entire unpacking and packing process.

[0121] The technical solution of this invention involves a control unit that, based on the connection of the packing device, allows the unpacking device to cooperate with the packing device to pack the boxes to be opened, thus completing the unpacking and packing process. By precisely controlling the switching of positive and negative pressure and the opening and closing of the positive pressure air path, the impact of air pressure fluctuations on equipment operation is reduced, energy is saved, and packaging efficiency is improved.

[0122] Based on the above embodiments, Figure 7 This is a schematic diagram of the control method for the fourth type of unpacking device provided in the embodiments of the present invention, combined with... Figure 1 , Figure 2 , Figure 3and Figure 7 As shown, the unpacking device also includes a linkage mechanism 8; the control method includes:

[0123] S40: Control the linkage mechanism to move the suction cup assembly to the preset position.

[0124] The linkage mechanism 8 can be a structure that drives the suction cup to move. Specifically, it can include a cam linkage mechanism 8, and the control unit 6 can drive the mechanical cam linkage mechanism 8 through the main shaft to achieve coordinated movement of the suction cup. In some embodiments, the linkage mechanism 8 is also provided with a main shaft encoder, which realizes coordinated control with the positive and negative pressure switch valve group 4 and the vacuum breaking valve group 5 according to the angle change of the main shaft encoder.

[0125] S41. Control the positive and negative pressure switch valve group to connect the suction cup group and the negative pressure pipeline so that the suction cup group generates negative pressure to adsorb the box to be opened.

[0126] S42. After the box to be opened is opened, control the positive and negative pressure switch valve group to connect the suction cup group and the positive pressure pipeline, and at the same time control the vacuum breaking valve group to open so that the suction cup group generates positive pressure to stop adsorbing the box to be opened.

[0127] Specifically, the control unit 6 can control the linkage mechanism 8 to move the bottom suction cup 11 to the suction box position, and after suctioning the box 7 to be opened, control the linkage mechanism 8 to move the bottom suction cup 11 to the boxing position. After the suction cup assembly 1 has finished suctioning the box 7 to be opened, the bottom suction cup 11, the front suction cup 12 and the rear suction cup 13 can be moved by controlling the linkage mechanism 8 to pull the box 7 to be opened open and shape it, thus achieving the purpose of opening the box.

[0128] The technical solution of this invention, by setting up a linkage mechanism and controlling the cooperation between the linkage mechanism and the suction cup assembly, realizes the opening and movement of the box to be opened, thereby improving the packaging efficiency of the production line.

[0129] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0130] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A control method for an unpacking device, characterized in that, This device is used in a case-opening device. The case-opening device includes: a suction cup assembly, a positive pressure pipeline, a negative pressure pipeline, a positive and negative pressure switching valve assembly, a vacuum breaking valve assembly, and a control unit. The suction cup assembly is connected to both the positive and negative pressure pipelines. The positive and negative pressure switching valve assembly is located on the connecting air path between the suction cup assembly and the positive pressure pipeline, and also on the connecting air path between the suction cup assembly and the negative pressure pipeline. The vacuum breaking valve assembly is located on the positive pressure pipeline. The control unit is communicatively connected to both the positive and negative pressure switching valve assembly and the vacuum breaking valve assembly. The suction cup assembly includes a bottom suction cup, a front suction cup, and a rear suction cup. The positive and negative pressure switching valve assembly includes a first positive and negative pressure switching valve, a second positive and negative pressure switching valve, and a third positive and negative pressure switching valve. The vacuum breaking valve assembly includes a first vacuum breaking valve, a second vacuum breaking valve, and a third vacuum breaking valve. The control unit is also communicatively connected to a case-packing device. The control method includes: Controlling the positive and negative pressure switch valve group to connect the suction cup group and the negative pressure pipeline, so that the suction cup group generates negative pressure to adsorb the box to be opened, specifically includes: controlling the first positive and negative pressure switch valve to connect the bottom suction cup and the negative pressure pipeline, so that the bottom suction cup adsorbs the bottom surface of the box to be opened; when the box to be opened moves to a specific position, controlling the connection of the front suction cup and the negative pressure pipeline, as well as the rear suction cup and the negative pressure pipeline, so that the front suction cup and the rear suction cup adsorb the sides of the box to be opened, thereby opening the box to be opened; After the box to be opened is opened, the third positive and negative pressure switch valve is controlled to connect the rear suction cup and the positive pressure pipeline, and the third vacuum breaking valve is controlled to open within a first preset time. When the packing device first transports the packing material into the box to be opened, the second positive and negative pressure switch valve is controlled to connect the front suction cup and the positive pressure pipeline, and the second vacuum breaking valve is controlled to open within a second preset time. After the packing device completes the packing, the first positive and negative pressure switch valve is controlled to connect the bottom suction cup and the positive pressure pipeline, and the first vacuum breaking valve is controlled to open within a third preset time.

2. The control method according to claim 1, characterized in that, The unpacking device also includes a linkage mechanism; The system further includes controlling the positive and negative pressure switching valve group to connect the suction cup group and the negative pressure pipeline, so that the suction cup group generates negative pressure to adsorb the box to be opened before: Control the movement of the linkage mechanism to move the suction cup assembly to a preset position.

Images