Buffer conveying device and control method thereof

Abstract

The invention relates to the technical field of industrial conveying, and particularly discloses a buffer conveying device and a control method thereof.The buffer conveying device comprises an input assembly, a buffer body and an output assembly, the buffer body comprises a buffer chamber and a protective door, the buffer chamber and the protective door are buckled to form a negative pressure cavity, and the buffer chamber is provided with a negative pressure opening and a distance sensor; the negative-pressure opening is communicated with the bottom of the negative-pressure cavity, the distance sensor is arranged in the negative-pressure cavity and located below the negative-pressure opening, the input assembly is used for conveying a paper tape into the negative-pressure cavity, and the output assembly is used for conveying the paper tape in the negative-pressure cavity out of the negative-pressure cavity. The distance sensor is arranged below the negative pressure opening, the distance between the paper tape and the distance sensor can be accurately measured under various conditions, the conveying speed of the paper tape can be adjusted in time, and the paper tape is prevented from being wrinkled or torn.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial conveying, and in particular to a buffer conveying device and a control method thereof. Background Art

[0002] The buffer is a key component for ensuring precise positioning and stable conveyance of the printed paper tape, particularly during high-speed operation. It reduces impact and prevents paper deviation or jamming. Under the negative pressure of the buffer, the paper tape partially enters the buffer. When the small box packaging machine experiences speed fluctuations or pressure changes in the buffer, this can easily lead to abnormal conveyance speed of the printed paper tape, causing an increase or decrease in the amount of paper tape entering the buffer. This ultimately causes unbalanced force on the paper tape, resulting in wrinkles due to excessive looseness or tears due to excessive tightness. Summary of the Invention

[0003] The object of the present invention is to provide a buffer conveying device and a control method thereof, so as to adjust the speed at which a paper tape enters the buffer and prevent the paper tape from wrinkling or tearing.

[0004] The present invention provides a buffer conveying device, comprising:

[0005] Input components;

[0006] A buffer body, the buffer body including a buffer chamber and a protective door, the buffer chamber and the protective door being buckled to form a negative pressure chamber, the buffer chamber being provided with a negative pressure port and a distance sensor, the negative pressure port being connected to the bottom of the negative pressure chamber, the negative pressure chamber being connected to the negative pressure machine through the negative pressure port, the distance sensor being arranged in the negative pressure chamber and located below the negative pressure port, the input assembly being installed at the entrance of the buffer body and being used to convey the paper tape into the negative pressure chamber;

[0007] An output component is installed at the outlet of the buffer body and is used to transport the paper tape in the negative pressure chamber out of the negative pressure chamber.

[0008] As an optimal technical solution for the buffer conveying device, the input component includes a positioning roller, an input roller, a pressure roller and a conveying motor. The positioning roller cooperates with the pressure roller, and the pressure roller cooperates with the input roller. The conveying motor is used to drive the input roller to rotate, and the paper tape passes through the positioning roller, the pressure roller and the input roller in sequence and then enters the negative pressure chamber.

[0009] As a preferred technical solution of the buffer conveying device, the pressure roller can move relative to the input roller to contact or separate from the input roller.

[0010] As a preferred technical solution of the buffer conveying device, the positioning roller is provided with a positioning groove of an annular structure, and the positioning groove is used to accommodate the paper tape and limit the axial sliding of the paper tape along the positioning roller.

[0011] As an optimal technical solution for the buffer conveying device, the protective door is hinged to the buffer chamber, a mounting seat is fixedly provided on the protective door, a positioning pin is installed on the mounting seat, and a positioning hole is correspondingly provided in the buffer chamber, and the positioning pin is used to cooperate with the positioning hole.

[0012] As a preferred technical solution of the buffer conveying device, a latch is connected to the protective door, and the latch can keep the protective door and the buffer chamber engaged.

[0013] As a preferred technical solution of the buffer conveying device, a sealing strip is provided between the protective door and the buffer chamber, and the sealing strip is used to seal the gap between the protective door and the buffer chamber.

[0014] As an optimal technical solution for the buffer conveying device, a plurality of negative pressure sensors are arranged in the negative pressure chamber, and the plurality of negative pressure sensors are arranged at intervals along the height direction of the negative pressure chamber. The negative pressure sensors are used to detect the negative pressure in the negative pressure chamber.

[0015] As a preferred technical solution of the buffer conveying device, the distance sensor is a laser sensor.

[0016] The present invention provides a control method for a buffer conveyor device, which is used to control the buffer conveyor device of any of the above solutions. The control method for the buffer conveyor device includes:

[0017] The protective door is buckled with the buffer chamber;

[0018] The input component transports the paper tape into the negative pressure chamber, and the output component transports the paper tape in the negative pressure chamber out of the negative pressure chamber;

[0019] If the distance between the paper tape and the distance sensor is greater than a preset value, the speed at which the input component conveys the paper tape into the negative pressure chamber is increased;

[0020] If the distance between the paper tape and the distance sensor is smaller than a preset value, the speed at which the input component conveys the paper tape into the negative pressure chamber is reduced.

[0021] The beneficial effects of the present invention are:

[0022] The present invention provides a buffer conveying device, which is provided with a negative pressure chamber. An input component conveys a paper tape into the negative pressure chamber, and an output component outputs the paper tape in the negative pressure chamber out of the negative pressure chamber. Under the action of negative pressure adsorption, a section of paper tape is always present in the negative pressure chamber for buffering, and the output paper tape has a certain tension. A distance sensor is provided below the negative pressure port, and the distance between the paper tape and the negative pressure port can be accurately measured under various circumstances, so as to timely adjust the conveying speed of the paper tape and avoid wrinkles or tears in the paper tape. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of the buffer conveying device in an embodiment of the present invention;

[0024] Figure 2 is a front view of a buffer chamber according to an embodiment of the present invention;

[0025] Figure 3 This is a front view of a protective door according to an embodiment of the present invention;

[0026] Figure 4 A side view of a protective door according to an embodiment of the present invention;

[0027] Figure 5 Schematic diagram of a paper tape in a negative pressure chamber when the conveying speed is moderate according to an embodiment of the present invention;

[0028] Figure 6 Schematic diagram of a paper tape in a negative pressure chamber when the conveying speed is slow in an embodiment of the present invention;

[0029] Figure 7 Schematic diagram of the paper tape in the negative pressure chamber when the conveying speed is relatively fast in an embodiment of the present invention.

[0030] In the picture:

[0031] 100, paper tape;

[0032] 1. Input assembly; 101. Positioning roller; 102. Input roller; 103. Pressing roller;

[0033] 2. Buffer body; 21. Buffer chamber; 211. Fixing seat; 212. Door closing sensor; 213. Negative pressure chamber; 214. Negative pressure sensor; 215. Negative pressure port; 216. Distance sensor; 217. Hinge; 218. Positioning hole; 22. Protective door; 221. Glass panel; 222. Sealing strip; 223. Mounting seat; 224. Positioning pin; 225. Latch; 226. Handle;

[0034] 3. Output assembly; 301. Output roller. DETAILED DESCRIPTION

[0035] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0038] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0039] like Figure 1-Figure 7As shown, the present invention provides a buffer conveying device, which includes an input component 1, a buffer body 2, and an output component 3. The buffer body 2 includes a buffer chamber 21 and a protective door 22. The buffer chamber 21 and the protective door 22 are fastened together to form a negative pressure chamber 213. The buffer chamber 21 is provided with a negative pressure port 215 and a distance sensor 216. The negative pressure port 215 is connected to the bottom of the negative pressure chamber 213. The negative pressure chamber 213 is connected to the negative pressure machine through the negative pressure port 215, so that the negative pressure machine can provide a negative pressure environment for the negative pressure chamber 213. The distance sensor 216 is arranged in the negative pressure chamber 213 and is located below the negative pressure port 215. The distance sensor 216 is used to measure the distance between the paper tape 100 in the negative pressure chamber 213 and the distance sensor 216, that is, to measure the position of the paper tape 100 in the negative pressure chamber 213. The input component 1 is installed at the entrance of the buffer body 2 and is used to convey the paper tape 100 into the negative pressure chamber 213. The output assembly 3 is installed at the outlet of the buffer body 2 and is used to transport the paper tape 100 in the negative pressure chamber 213 out of the negative pressure chamber 213. The upper end of the negative pressure chamber 213 of the buffer body 2 is connected to the outside world. When the paper tape 100 passes through the negative pressure chamber 213, under the negative pressure adsorption of the negative pressure chamber 213, part of the paper tape 100 is located in the negative pressure chamber 213, that is, there is always a section of paper tape 100 in the negative pressure chamber 213 for buffering, and the output paper tape 100 has a certain tension. A distance sensor 216 is provided below the negative pressure port 215, which can accurately measure the distance between the paper tape 100 and it in various situations, so as to timely adjust the conveying speed of the paper tape 100 and avoid wrinkles or tears in the paper tape 100.

[0040] For further information, please refer to Figure 1-Figure 2 As shown, the input component 1 includes a reel (not shown in the figure), a positioning roller 101, an input roller 102, a pressure roller 103 and a conveying motor (not shown in the figure). The paper tape 100 is installed on the reel, and the motor of the reel rotates and releases the paper tape 100. The output component 3 includes an output roller 301, which is installed at the outlet of the buffer body 2. The positioning roller 101 cooperates with the pressure roller 103, and the pressure roller 103 cooperates with the input roller 102. The conveying motor is used to drive the input roller 102 to rotate. The paper tape 100 released by the reel passes through the positioning roller 101, the pressure roller 103 and the input roller 102 in sequence and then enters the negative pressure chamber 213. The material of the input roller 102 is preferably rubber. During the process of conveying the paper tape 100, the unwinder rotates at a certain speed to release the paper tape 100. When the paper tape 100 passes through the input roller 102, the conveying motor drives the input roller 102 to rotate, and the input roller 102 provides additional friction to the paper tape 100, ensuring that the paper tape 100 can be conveyed forward smoothly and output through the output roller 301 after passing through the negative pressure chamber 213.

[0041] Specifically, the pinch roller 103 is capable of moving relative to the input roller 102 to contact or separate from the input roller 102. When the pinch roller 103 contacts the input roller 102, the paper tape 100 is pressed against the input roller 102 by the pinch roller 103. The input roller 102 provides additional friction to the paper tape 100, ensuring smooth conveyance of the paper tape 100. When an abnormality such as a breakage occurs in the paper tape 100, the pinch roller 103 is separated from the input roller 102, thereby facilitating replacement and rearrangement of the paper tape 100. After the paper tape 100 is rearranged, the pinch roller 103 is brought into contact with the input roller 102 to resume normal conveyance of the paper tape 100. The specific structure and implementation method for the pinch roller 103 to achieve movement relative to the input roller 102 are conventional in the art and will not be described in detail here.

[0042] Specifically, the positioning roller 101 is provided with an annular positioning groove for accommodating the paper tape 100 and limiting the axial sliding of the paper tape 100 along the positioning roller 101. By providing the positioning roller 101, the position of the paper tape 100 is limited, thereby preventing the paper tape 100 from deviating along its width direction during transportation.

[0043] Furthermore, if Figure 1-Figure 4 As shown, the protective door 22 is hinged to the buffer chamber 21, and both the protective door 22 and the buffer chamber 21 are equipped with hinges 217 to achieve hinged connection. A mounting seat 223 is fixedly provided on the protective door 22, and a positioning pin 224 is installed on the mounting seat 223. The buffer chamber 21 is correspondingly provided with a positioning hole 218, and the positioning pin 224 is used to position and cooperate with the positioning hole 218 to improve the accuracy of the protective door 22 and the buffer chamber 21 after being fastened. A latch 225 is connected to the protective door 22, and the latch 225 can keep the protective door 22 and the buffer chamber 21 fastened. The main structure of the protective door 22 or the part corresponding to the negative pressure chamber 213 is set as a glass panel 221, which can more intuitively observe the situation in the negative pressure chamber 213. A handle 226 is also installed on the protective door 22 to facilitate the door opening or closing operation. Correspondingly, a fixing base 211 is provided on the buffer chamber 21, to which a door closing sensor 212 is fixedly connected. When the protective door 22 is engaged with the buffer chamber 21, a latch 225 triggers the door closing sensor 212 to facilitate door closing status monitoring. The door closing sensor 212 can be an infrared sensor or a proximity switch. A sealing strip 222 is provided between the protective door 22 and the buffer chamber 21. The sealing strip 222 is used to seal the gap between the protective door 22 and the buffer chamber 21, preventing leakage in the negative pressure chamber 213 and frequent pressure changes in the negative pressure chamber 213.

[0044] Optionally, multiple negative pressure sensors 214 are provided in the negative pressure chamber 213, and are spaced apart along the height direction of the negative pressure chamber 213. The negative pressure sensors 214 are used to detect the negative pressure in the negative pressure chamber 213. By providing multiple negative pressure sensors 214, when a poor seal occurs between the protective door 22 and the buffer chamber 21, the negative pressure values ​​detected by adjacent negative pressure sensors 214 will change significantly, allowing operators to quickly locate the poor seal and perform repairs in a timely manner.

[0045] Alternatively, the distance sensor 216 may be an ultrasonic sensor or a laser sensor. In this embodiment, the distance sensor 216 is preferably a laser sensor. A corresponding controller is provided, and the door closing sensor 212, the negative pressure sensor 214, and the laser sensor are all communicatively connected to the controller. The controller may be a separate or integrated single-chip microcomputer, running a conventional control program to collect and process the corresponding sensor signals.

[0046] The present invention provides a printing machine, comprising a printing device, a machine body, and a buffer conveying device in this embodiment. The buffer conveying device is installed on the machine body, and the output component 3 conveys the paper tape 100 to the printing device, and the printing device prints the paper tape 100. When the rotation speed of the printing device matches the conveying speed of the paper tape 100, the position of the paper tape 100 in the negative pressure chamber 213 is as follows: Figure 5 As shown, at this time, the distance between the paper tape 100 and the distance sensor 216 is moderate; when the rotation speed of the printing device is higher than the conveying speed of the paper tape 100, that is, when the conveying speed of the paper tape 100 is slow, the position of the paper tape 100 in the negative pressure chamber 213 is as shown in FIG. Figure 6 As shown, at this time, the distance between the paper tape 100 and the distance sensor 216 is large, the tension of the paper tape 100 is high, and the risk of tearing increases; when the rotation speed of the printing device is lower than the conveying speed of the paper tape 100, that is, when the conveying speed of the paper tape 100 is fast, the position of the paper tape 100 in the negative pressure chamber 213 is as shown in FIG. Figure 7 As shown, the distance between the paper tape 100 and the distance sensor 216 is small, the tension of the paper tape 100 is low, and the risk of wrinkles increases. At this time, the conveying speed of the paper tape 100 is adjusted based on the distance between the paper tape 100 and the distance sensor 216, so that the tension of the paper tape 100 is at an appropriate level, ensuring the quality and accuracy of the printing.

[0047] The present invention provides a control method for a buffer conveyor device, which is used to control the buffer conveyor device in this embodiment. The control method for the buffer conveyor device includes:

[0048] The protective door 22 is buckled with the buffer chamber 21;

[0049] The input component 1 conveys the paper tape 100 into the negative pressure chamber 213 , and the output component 3 conveys the paper tape 100 in the negative pressure chamber 213 out of the negative pressure chamber 213 ;

[0050] Determine the distance between the paper tape 100 and the distance sensor 216. If the distance between the paper tape 100 and the distance sensor 216 is greater than a preset value, increase the speed of the input component 1 in conveying the paper tape 100 into the negative pressure chamber 213.

[0051] If the distance between the paper tape 100 and the distance sensor 216 is smaller than a preset value, the speed at which the input assembly 1 conveys the paper tape 100 into the negative pressure chamber 213 is reduced.

[0052] The preset value in this embodiment is determined based on actual engineering practice, and during the printing process, the rotational speed of the printing device of the printing machine fluctuates. Therefore, the preset value in this embodiment can correspond to a fluctuation range. When the distance between the paper tape 100 and the distance sensor 216 is within the fluctuation range of the preset value, the speed at which the input component 1 conveys the paper tape 100 into the negative pressure chamber 213 does not change, so as to avoid frequent adjustment of the conveying speed of the input component 1.

[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A buffer conveying device, characterized in that: include: Input component (1); A buffer body (2), the buffer body (2) comprising a buffer chamber (21) and a protective door (22), the buffer chamber (21) and the protective door (22) being fastened to form a negative pressure chamber (213), the buffer chamber (21) being provided with a negative pressure port (215) and a distance sensor (216), the negative pressure port (215) being connected to the bottom of the negative pressure chamber (213), the negative pressure chamber (213) being connected to a negative pressure machine via the negative pressure port (215), the distance sensor (216) being arranged in the negative pressure chamber (213) and located below the negative pressure port (215), the input assembly (1) being installed at the entrance of the buffer body (2) and being used for conveying a paper tape (100) into the negative pressure chamber (213); An output component (3) is installed at the outlet of the buffer body (2) and is used to transport the paper tape (100) in the negative pressure chamber (213) out of the negative pressure chamber (213).

2. The buffer conveying device according to claim 1, characterized in that: The input assembly (1) comprises a positioning roller (101), an input roller (102), a pressure roller (103) and a conveying motor. The positioning roller (101) cooperates with the pressure roller (103), and the pressure roller (103) cooperates with the input roller (102). The conveying motor is used to drive the input roller (102) to rotate. The paper tape (100) passes through the positioning roller (101), the pressure roller (103) and the input roller (102) in sequence and then enters the negative pressure chamber (213).

3. The buffer conveying device according to claim 2, characterized in that: The pressing roller (103) is movable relative to the input roller (102) to come into contact with or separate from the input roller (102).

4. The buffer conveying device according to claim 2, characterized in that: The positioning roller (101) is provided with a positioning groove of an annular structure, and the positioning groove is used to accommodate the paper tape (100) and limit the axial sliding of the paper tape (100) along the positioning roller (101).

5. The buffer conveying device according to claim 1, characterized in that: The protective door (22) is hinged to the buffer chamber (21); a mounting seat (223) is fixedly provided on the protective door (22); a positioning pin (224) is installed on the mounting seat (223); a positioning hole (218) is correspondingly provided in the buffer chamber (21); and the positioning pin (224) is used for positioning and cooperating with the positioning hole (218).

6. The buffer conveying device according to claim 1, characterized in that: A latch (225) is connected to the protective door (22), and the latch (225) can keep the protective door (22) and the buffer chamber (21) locked.

7. The buffer conveying device according to claim 5, characterized in that: A sealing strip (222) is provided between the protective door (22) and the buffer chamber (21), and the sealing strip (222) is used to seal the gap between the protective door (22) and the buffer chamber (21).

8. The buffer conveying device according to any one of claims 1 to 7, characterized in that: A plurality of negative pressure sensors (214) are provided in the negative pressure chamber (213), and the plurality of negative pressure sensors (214) are arranged at intervals along the height direction of the negative pressure chamber (213). The negative pressure sensors (214) are used to detect the negative pressure in the negative pressure chamber (213).

9. The buffer conveying device according to any one of claims 1 to 7, characterized in that: The distance sensor (216) is a laser sensor.

10. A control method for a buffer conveyor device, characterized in that: Used to control the buffer conveyor device according to any one of claims 1 to 9, the control method of the buffer conveyor device comprising: The protective door (22) is buckled with the buffer chamber (21); The input component (1) conveys the paper tape (100) into the negative pressure chamber (213), and the output component (3) conveys the paper tape (100) in the negative pressure chamber (213) out of the negative pressure chamber (213); If the distance between the paper tape (100) and the distance sensor (216) is greater than a preset value, increasing the speed of the input component (1) conveying the paper tape (100) into the negative pressure chamber (213); If the distance between the paper tape (100) and the distance sensor (216) is smaller than a preset value, the speed at which the input component (1) conveys the paper tape (100) into the negative pressure chamber (213) is reduced.

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