A bottle cap stack conveying line and a bottle cap packaging machine

Abstract

The utility model discloses a kind of bottle cap stack conveying line and bottle cap packaging machine, bottle cap stack conveying line includes conveying belt, first driving device, second driving device and several fixtures;Fixtures are spaced apart on conveying belt and can be driven to forward transport under conveying belt;Fixture includes support seat, first clamping component and second clamping component, support seat is installed on conveying belt, first clamping component and second clamping component are respectively movably arranged in the left and right sides of support seat, support seat, first clamping component and second clamping component are enclosed into the clamping space with upper end open;By using first driving device to drive movably arranged clamping component, clamping component can be self-adaptingly adjusted clamping force and spacing according to bottle cap stack actual length, without reserving too large excess amount, it can be realized to be closely positioned, both avoid extrusion damage caused by improper spacing of fixed stroke air cylinder, also avoid the problem of inclination caused by excess amount reservation, ensure that bottle cap stack always keeps neat posture in conveying process.

Description

Technical Field

[0001] This utility model relates to the field of packaging equipment, and in particular to a bottle cap stacking conveyor line and a bottle cap packaging machine. Background Technology

[0002] In the bottle cap packaging production process, the stacked bottle caps need to be transported to the wrapping and heat shrinking processes for further processing, as described in Chinese Patent 2024118285377 (A Packaging Production Line for Bottle Caps). In the prior art, the positioning during the transport process is mostly achieved by directly squeezing the two sides of the bottle cap stack with cylinders. However, due to the fixed stroke of the cylinders, there are significant drawbacks: if the distance between the two cylinders is adjusted to perfectly match the length of the bottle cap stack, excessive squeezing can easily occur due to positioning accuracy deviations or slight fluctuations in the size of the bottle cap stack, resulting in deformation and damage to the bottle cap stack; if a gap margin is reserved to avoid squeezing damage, the stability of the bottle cap stack during the transport process cannot be guaranteed, and it is very easy for it to tilt or shift, which in turn affects the flatness of the subsequent wrapping and the processing quality of the heat shrinking process. In severe cases, it can even lead to production line shutdown for adjustment, reducing production efficiency and increasing product loss.

[0003] Therefore, there is an urgent need for a conveyor structure that is compatible with existing bottle cap stacks and takes into account both positioning stability and damage prevention requirements, so as to connect the wrapping and heat shrinking processes and ensure the smooth operation of the packaging production line. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a bottle cap stacking conveyor line and a bottle cap packaging machine.

[0005] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: a bottle cap stack conveyor line, including a conveyor belt, a first driving device, a second driving device, and several fixtures; The fixtures are spaced on the conveyor belt and can be conveyed forward under the drive of the conveyor belt; The fixture includes a support base, a first clamping assembly, and a second clamping assembly. The support base is mounted on the conveyor belt, and the first clamping assembly and the second clamping assembly are respectively movably arranged on the left and right sides of the support base. The support base, the first clamping assembly, and the second clamping assembly enclose a clamping space with an open top. The first driving device is located at the beginning of the conveyor belt and is used to drive the first clamping component and the second clamping component to move away from each other or move closer to each other. The horizontally placed bottle cap stack can be placed into the clamping space when the first clamping component and the second clamping component move away from each other. When the first clamping component and the second clamping component move closer to each other, they can push the two sides of the bottle cap stack respectively so that the bottle cap stack is confined within the clamping space. The second drive unit is located at the end of the conveyor belt and is used to drive the first clamping assembly and the second clamping assembly to move away from each other so that the bottle cap stack is removed from the clamping space.

[0006] As one of the preferred embodiments of this utility model, the support base includes a first base, a second base, a first support rod, and a second support rod; The first base and the second base are arranged on the left and right sides of the conveyor belt, respectively. The first clamping assembly is movably mounted on the first base, and the second clamping assembly is movably mounted on the second base. The first and second support rods are connected between the first and second bases and are spaced apart in the front-to-back direction. The lower end of the bottle cap stack is supported on the first and second support rods.

[0007] As one of the preferred embodiments of this utility model, the first clamping assembly and / or the second clamping assembly include a connecting rod, a pressure plate, a pull plate, and an elastic element; The connecting rod passes through the left side of the support. The pressure plate is located at one end of the connecting rod; The pull plate is located at the other end of the connecting rod; The elastic element abuts between the pressure plate and the support seat to provide an inward driving force for the pressure plate.

[0008] In one of the preferred embodiments of this utility model, the elastic element is configured as a helical spring.

[0009] As one of the preferred embodiments of this utility model, the first driving device includes a first cylinder, a second cylinder, a first pull sleeve, and a second pull sleeve; The first cylinder is located on the left side of the support, and the second cylinder is located on the right side of the support. The first pull sleeve is connected to the output end of the first cylinder and has a first pull groove that runs through the front and rear. The second pull sleeve is connected to the output end of the second cylinder and has a second pull groove that runs through the front and rear. When a portion of the first clamping component enters the first groove and a portion of the second clamping component enters the second groove, the first cylinder and the second cylinder can drive the first clamping component and the second clamping component to move away from each other or closer to each other.

[0010] In one of the preferred embodiments of this utility model, the first cylinder is connected to the conveyor belt through the first adjusting component and is used to adjust the distance between the first cylinder and the support seat; the second cylinder is connected to the conveyor belt through the second adjusting component and is used to adjust the distance between the second cylinder and the support seat.

[0011] As one of the preferred embodiments of this utility model, the first adjustment component and / or the second adjustment component include a fixed base, a sliding base, and a locking wrench; The fixed seat is installed on the conveyor belt; The sliding seat is slidably mounted on the fixed seat, and the first cylinder or the second cylinder is mounted on the sliding seat; The locking wrench is connected between the fixed seat and the sliding seat to limit the relative sliding between the fixed seat and the sliding seat.

[0012] As one of the preferred embodiments of this utility model, the second driving device includes a first guide rail and a second guide rail; The first guide rail is located on the left side of the conveyor belt, and at least a portion of the first clamping assembly can enter into the first guide rail; The second guide rail is located on the right side of the conveyor belt, and at least a portion of the second clamping assembly can enter into the second guide rail; The distance between the first guide rail and the second guide rail gradually increases along the conveying direction of the conveyor belt, so that the first clamping assembly and the second clamping assembly are far apart from each other.

[0013] As one of the preferred embodiments of this utility model, the first driving device is configured as two sets and arranged at intervals along the conveying direction of the conveyor belt.

[0014] A bottle cap packaging machine includes the aforementioned bottle cap stack conveyor line.

[0015] The beneficial effects of this utility model are as follows: A bottle cap stack conveyor line and a bottle cap packaging machine are provided. The bottle cap stack conveyor line includes a conveyor belt, a first driving device, a second driving device, and several fixtures. The fixtures are spaced apart on the conveyor belt and can be conveyed forward under the drive of the conveyor belt. Each fixture includes a support seat, a first clamping assembly, and a second clamping assembly. The support seat is mounted on the conveyor belt, and the first and second clamping assemblies are movably arranged on the left and right sides of the support seat, respectively. The support seat, the first clamping assembly, and the second clamping assembly enclose a clamping space with an open upper end. By using the first driving device to drive the movably arranged clamping assemblies, the rigid extrusion of the traditional fixed-stroke cylinder is replaced. The clamping assemblies can adaptively adjust the clamping force and spacing according to the actual length of the bottle cap stack. Tight positioning can be achieved without leaving too much margin. This avoids the extrusion damage caused by improper spacing of the fixed-stroke cylinder and the tilting problem caused by the margin, ensuring that the bottle cap stack always maintains a neat posture during the conveying process. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 A schematic diagram of the first structure of a bottle cap stack conveyor line; Figure 2 This is a schematic diagram of the second structure of a bottle cap stack conveyor line; Figure 3 for Figure 1 A magnified view of a portion of region A in the middle; Figure 4 for Figure 2 A magnified view of a portion of region B in the middle; Figure 5 This is a schematic diagram of the fixture structure; Figure 6 This is a schematic diagram of the second drive device. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] Reference Figures 1-6 This utility model provides a bottle cap stacking conveyor line, including a conveyor belt 100, a first driving device 200, a second driving device 300, and a plurality of fixtures 400. The fixtures 400 are spaced apart on the conveyor belt 100 and can be conveyed forward under the drive of the conveyor belt 100; The fixture 400 includes a support base 410, a first clamping assembly 420a, and a second clamping assembly 420b. The support base 410 is mounted on the conveyor belt 100. The first clamping assembly 420a and the second clamping assembly 420b are respectively movably disposed on the left and right sides of the support base 410. The support base 410, the first clamping assembly 420a, and the second clamping assembly 420b enclose a clamping space 430 with an open upper end. The first driving device 200 is located at the beginning of the conveyor belt 100 and is used to drive the first clamping component 420a and the second clamping component 420b to move away from each other or move closer to each other. The horizontally placed bottle cap stack 500 can be placed into the clamping space 430 when the first clamping component 420a and the second clamping component 420b move away from each other. When the first clamping component 420a and the second clamping component 420b move closer to each other, they can push the two sides of the bottle cap stack 500 respectively so that the bottle cap stack 500 is confined within the clamping space 430. The second drive device 300 is disposed at the end of the conveyor belt 100 and is used to drive the first clamping assembly 420a and the second clamping assembly 420b to move away from each other so that the bottle cap stack 500 is moved out of the clamping space 430.

[0022] The bottle cap stack conveyor line disclosed in this utility model can connect horizontally placed bottle cap stacks, achieving stable conveying of them to the coating and heat shrinking processes. The following description, in conjunction with the attached figures... Figure 1-6 It provides a detailed explanation of its specific structure, working principle, and operation process.

[0023] I. Overall Structure Description This bottle cap stack conveyor line mainly consists of a conveyor belt 100, a first drive device 200, a second drive device 300, and several fixtures 400. The middle section of the conveyor belt 100 is also connected to a wrapping device (not separately labeled) and a heat shrinking device 700, forming a complete connection process of "stacking bottle cap stacks → conveying and positioning → wrapping → heat shrinking".

[0024] Conveyor belt 100: It adopts a continuous circulating conveying structure to provide stable forward conveying power for fixture 400. Its conveying speed can be adaptively adjusted according to the processing rhythm of subsequent wrapping and heat shrinking processes to ensure smooth process connection.

[0025] Fixtures 400 are evenly spaced along the length of the conveyor belt 100. Each fixture 400 corresponds to carrying a stack of bottle caps 500. Each fixture 400 includes a support base 410, a first clamping assembly 420a, and a second clamping assembly 420b, which together form a clamping space 430 with an open upper end, used to accommodate and limit the stack of bottle caps 500. The support base 410 includes a first base 411, a second base 412, a first support rod 413, and a second support rod 414. The first base 411 and the second base 412 are located on the left and right sides of the conveyor belt 100, respectively. The first clamping component 420a is movably disposed on the first base 411, and the second clamping component 420b is movably disposed on the second base 412. The first support rod 413 and the second support rod 414 are connected between the first base 411 and the second base 412 and are arranged at intervals in the front-back direction. The lower end of the bottle cap stack 500 is supported on the first support rod 413 and the second support rod 414. The first support rod 413 and the second support rod 414 are arranged at intervals in the front-back direction to form the bottom support surface of the bottle cap stack 500, which not only ensures the stability of the support, but also reserves space for the bottom film to wrap in the subsequent film wrapping process.

[0026] Reference Figures 1-5 Furthermore, the first clamping assembly 420a and / or the second clamping assembly 420b include a connecting rod 421, a pressure plate 422, a pull plate 423, and an elastic element; the connecting rod 421 passes through the left side of the support seat 410; the pressure plate 422 is disposed at one end of the connecting rod 421; the pull plate 423 is disposed at the other end of the connecting rod 421; the elastic element abuts between the pressure plate 422 and the support seat 410, and is used to provide an inward driving force for the pressure plate 422; the first clamping assembly 420a and the second clamping assembly 420b have the same structure, and the helical spring abuts between the pressure plate 422 and the support seat 410, and normally provides an inward preload force for the pressure plate 422, so that the pressure plate 422 has an adaptive clamping capability.

[0027] The first driving device 200 is configured as two sets and arranged at intervals at the beginning along the conveying direction of the conveyor belt 100. Each set of the first driving device 200 includes a first cylinder 210, a second cylinder 220, a first pull sleeve 230, and a second pull sleeve 240. The first cylinder 210 is located on the left side of the support 410, and the second cylinder 220 is located on the right side of the support 410. The first pull sleeve 230 is connected to the output end of the first cylinder 210 and has a first pull groove 250 that runs through it. The second pull sleeve 240 is connected to the output end of the second cylinder 220 and has a second pull groove 260 that runs through it. When a part of the first clamping component 420a enters the first pull groove 250 and a part of the second clamping component 420b enters the second pull groove 260, the first cylinder 210 and the second cylinder 220 can drive the first clamping component 420a and the second clamping component 420b to move away from each other or move closer to each other.

[0028] Furthermore, the first cylinder 210 and the second cylinder 220 are respectively mounted on both sides of the conveyor belt 100 via the first adjusting assembly 600a and the second adjusting assembly 600b, which can adjust the distance between the first cylinder 210 and the support seat 410 and the distance between the second cylinder 220 and the support seat 410. Preferably, the adjusting assembly consists of a fixed seat 610, a sliding seat 620 and a locking wrench 630. The fixed seat 610 is disposed on the conveyor belt 100; the sliding seat 620 is slidably disposed on the fixed seat 610. The first cylinder 210 or the second cylinder 220... The cylinder is mounted on the sliding seat 620; the locking wrench 630 is connected between the fixed seat 610 and the sliding seat 620 to limit the relative sliding between the fixed seat 610 and the sliding seat 620; the distance between the cylinder and the support seat 410 can be adjusted by sliding the sliding seat 620 on the fixed seat 610 to adapt to the initial positioning requirements of bottle cap stacks 500 of different specifications; the first pull sleeve 230 and the second pull sleeve 240 are respectively connected to the output end of the cylinder, and the first pull groove 250 and the second pull groove 260 opened on them can cooperate with the pull plate 423 of the clamping component to realize the opening and closing drive of the clamping component.

[0029] Furthermore, the first pull groove 250 includes a first limiting groove 251 and a first clearance groove 252 communicating with the first limiting groove 251. The first pull groove 260 includes a second limiting groove 261 and a second clearance groove 262 communicating with the second limiting groove 261. When the fixture 400 moves to be opposite to the first driving device 200, the first connecting rod 421 on the first clamping assembly 420a enters the first clearance groove 252 and the first pull plate 423 enters the first limiting groove 251. The second connecting rod 421 on the second clamping assembly 420b enters the second clearance groove 262 and the second pull plate 423 enters the second limiting groove 261. This allows the first cylinder 210 and the second cylinder 220 to move the first pull plate 423 inward or outward synchronously when they are actuated, ultimately causing the distance between the first pressure plate 422 and the second pressure plate 422 to expand or shrink.

[0030] The second driving device 300 is located at the end of the conveyor belt 100 and includes a first guide rail 310 and a second guide rail 320. The first guide rail 310 is located on the left side of the conveyor belt 100, and at least a portion of the first clamping component 420a can enter the first guide rail 310. The second guide rail 320 is located on the right side of the conveyor belt 100, and at least a portion of the second clamping component 420b can enter the second guide rail 320. The distance between the first guide rail 310 and the second guide rail 320 gradually increases along the conveying direction of the conveyor belt 100, so that the first clamping component 420a and the second clamping component 420b move away from each other. The distance between the two guide rails gradually increases along the conveying direction, forming a "trumpet mouth" structure, which is used to drive the clamping components to open automatically and release the bottle cap stack 500.

[0031] II. Working Principle This conveyor line employs a three-stage working logic: "initial drive clamping → mid-section stable conveying → end-stage automatic release." Combined with the elastic adaptive structure of the clamping components, it replaces the rigid compression positioning of traditional fixed-stroke cylinders. The first drive device 200 uses a cylinder to drive the pull sleeve to open and close the clamping components, achieving the insertion and initial positioning of the bottle cap stack 500. The helical spring of the clamping components provides flexible clamping force to the pressure plate 422, and the spacing can be adaptively adjusted according to the actual length of the bottle cap stack 500, avoiding rigid compression or excessive gaps. The second drive device 300, through the gradually varying spacing structure of the guide rail, forces the clamping components to open under the conveying force of the conveyor belt 100, completing the non-destructive release of the bottle cap stack 500. The entire process requires no manual intervention, achieving automated continuous conveying.

[0032] III. Detailed Action Process Initial preparation stage: Based on the length of the stacked bottle caps (500), adjust the first adjustment component 600a and the second adjustment component 600b: loosen the locking wrench 630, push the sliding seat 620 to move the cylinder, so that the first pull sleeve 230 and the second pull sleeve 240 are aligned with the pull plate 423 of the fixture 400. After adjustment, tighten the locking wrench 630 to fix the sliding seat 620, ensuring the matching accuracy between the first drive device 200 and the fixture 400.

[0033] Bottle cap stack placement and clamping positioning stage: When the fixture 400 moves with the conveyor belt 100 to the position of the first group of first drive devices 200, the conveyor belt 100 briefly pauses. At this time, the first cylinder 210 and the second cylinder 220 are in the extended state. The first pull plate 423 on the first clamping assembly 420a enters the first pull groove 250 on the first pull sleeve 230, and the second pull plate 423 on the second clamping assembly 420b enters the second pull groove 260 on the second pull sleeve 240. Then the first cylinder is restarted. 210 and the second cylinder 220 retract synchronously, respectively driving the first pull sleeve 230 and the second pull sleeve 240 to move outward, thereby causing the pressure plates 422 of the first clamping assembly 420a and the second clamping assembly 420b to move away from each other, and the clamping space 430 to be in the maximum open state. The helical spring is compressed and stores elastic potential energy. Then, the stacked bottle caps 500 is placed horizontally into the clamping space 430 of the fixture 400 through the material transfer mechanism. The lower end of the bottle cap stack 500 is supported on the first support rod 413 and the second support rod 414.

[0034] Subsequently, the first cylinder 210 and the second cylinder 220 extend synchronously, the lateral pulling force of the first pull sleeve 230 and the second pull sleeve 240 on the first pull plate 423 and the second pull plate 423 disappears, the first clamping component 420a and the second clamping component 420b move inward under the elastic restoring force of the helical spring, and the first pressure plate 422 and the second pressure plate 422 gradually fit against the two side surfaces of the bottle cap stack 500; due to the flexible driving force of the helical spring, the first pressure plate 422 and the second pressure plate 422 will automatically stop moving according to the actual length of the bottle cap stack 500, forming a tight clamping state without excessive compression. Even if there are dimensional fluctuations in the bottle cap stack 500, it can be adaptively compensated by the spring deformation to avoid compression damage or gap tilting; it should be noted that the purpose of setting two sets of first driving devices 200 is to match two sets of material transfer mechanisms, which multiplies the packaging efficiency. It is only necessary to set their respective start and stop according to the distance between the two sets of first driving devices 200 to avoid the subsequent first driving device 200 from performing secondary clamping on the already clamped bottle cap screw 500.

[0035] Mid-section conveying and subsequent processing stage: After clamping and positioning, the conveyor belt 100 resumes operation, driving the fixture 400 and the bottle cap stack 500 to move towards the mid-section. During the conveying process, the spiral spring continuously provides pre-tension to the pressure plate 422. When the conveyor belt 100 starts, stops, or vibrates, the pressure plate 422 can absorb the impact force through slight displacement, preventing the bottle cap stack 500 from shifting laterally or tilting longitudinally. It should be noted that a wrapping device is provided around the first drive device 200. First, the wrapping device lays the packaging film in the support seat 410, then the bottle cap stack 500 is placed in the clamping space 430 and pressed on the packaging film. Finally, the wrapping device seals and cuts the packaging film. This is existing technology and will not be described in detail here, nor should it be considered a limitation of this utility model. Subsequently, the fixture 400 continues to move into the heat shrinking device 700. The heat shrinking device 700 shrinks and shapes the heat shrink film by heating, completing the packaging process.

[0036] End-release stage: When the fixture 400, carrying the heat-shrinked bottle cap stack 500, moves to the position of the second drive device 300, the first pull plate 423 of the first clamping assembly 420a first enters the first guide rail 310. As the conveyor belt 100 continues to convey forward, under the guidance of the first guide rail 310, the pull plate 423 drives the connecting rod 421 and the pressure plate 422 to move outward, and the helical spring is compressed; at the same time, the second pull plate 423 of the second clamping assembly 420b enters the second guide rail 320. Inside, under the action of the guide rail with gradually varying spacing, they move synchronously outward, causing the first clamping component 420a and the second clamping component 420b to gradually move away from each other, and the clamping space 430 opens; when the fixture 400 is completely disengaged from the second drive device 300, the pressure plate 422 is completely separated from the bottle cap stack 500, and the bottle cap stack 500 is moved out of the fixture 400 under the traction of gravity and the subsequent conveying mechanism, and enters the next process; while the fixture 400 continues to cycle with the conveyor belt 100 to the beginning, ready for the next clamping and conveying.

[0037] This utility model also provides a bottle cap packaging machine, including the aforementioned bottle cap stack conveyor line. A film wrapping device is provided at the beginning of the conveyor belt 100 for heat-shrinking film wrapping of the bottle cap stack 500 on the fixture 400. Furthermore, a heat-shrinking device 700 is provided in the middle section of the conveyor belt 100. The heat-shrinking device 700 is connected to the output end of the packaging device for heat-shrinking the bottle cap stack 500 covered with heat-shrinking film on the fixture 400.

[0038] The advantages of this utility model are as follows: by using a first driving device to drive the movable clamping component, the rigid extrusion of the traditional fixed stroke cylinder is replaced. The clamping component can adaptively adjust the clamping force and spacing according to the actual length of the bottle cap stack. It can achieve tight positioning without leaving too much margin. This avoids the squeezing damage caused by improper spacing of the fixed stroke cylinder, and also avoids the tilting problem caused by the margin. It ensures that the bottle cap stack always maintains a neat posture during the conveying process.

[0039] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A bottle cap stack conveyor line, characterized in that: It includes a conveyor belt (100), a first drive unit (200), a second drive unit (300), and several jigs (400); The fixture (400) is spaced apart on the conveyor belt (100) and can be conveyed forward under the drive of the conveyor belt (100); The fixture (400) includes a support base (410), a first clamping assembly (420a), and a second clamping assembly (420b). The support base (410) is mounted on the conveyor belt (100). The first clamping assembly (420a) and the second clamping assembly (420b) are respectively movably disposed on the left and right sides of the support base (410). The support base (410), the first clamping assembly (420a), and the second clamping assembly (420b) enclose a clamping space (430) with an open upper end. The first driving device (200) is disposed at the beginning of the conveyor belt (100) and is used to drive the first clamping assembly (420a) and the second clamping assembly (420b) to move away from each other or move closer to each other. The horizontally placed bottle cap stack (500) can be placed in the clamping space (430) when the first clamping assembly (420a) and the second clamping assembly (420b) move away from each other. When the first clamping assembly (420a) and the second clamping assembly (420b) move closer to each other, they can push the two sides of the bottle cap stack (500) respectively, so that the bottle cap stack (500) is confined within the clamping space (430). The second drive device (300) is disposed at the end of the conveyor belt (100) for driving the first clamping assembly (420a) and the second clamping assembly (420b) to move away from each other so that the bottle cap stack (500) is removed from the clamping space (430).

2. The bottle cap stacking conveyor line according to claim 1, characterized in that: The support base (410) includes a first base (411), a second base (412), a first support rod (413), and a second support rod (414). The first base (411) and the second base (412) are respectively arranged on the left and right sides of the conveyor belt (100), the first clamping assembly (420a) is movably disposed on the first base (411), and the second clamping assembly (420b) is movably disposed on the second base (412); The first support rod (413) and the second support rod (414) are connected between the first base (411) and the second base (412) and are spaced apart in the front-back direction. The lower end of the bottle cap stack (500) is supported on the first support rod (413) and the second support rod (414).

3. The bottle cap stacking conveyor line according to claim 1, characterized in that: The first clamping assembly (420a) and / or the second clamping assembly (420b) include a connecting rod (421), a pressure plate (422), a pull plate (423), and an elastic element; The connecting rod (421) passes through the left side of the support (410); The pressure plate (422) is disposed at one end of the connecting rod (421); The pull plate (423) is disposed at the other end of the connecting rod (421); The elastic element abuts between the pressure plate (422) and the support seat (410) to provide an inward driving force for the pressure plate (422).

4. A bottle cap stacking conveyor line according to claim 3, characterized in that: The elastic element is configured as a helical spring.

5. A bottle cap stack conveyor line according to claim 1, characterized in that: The first drive device (200) includes a first cylinder (210), a second cylinder (220), a first pull sleeve (230), and a second pull sleeve (240); The first cylinder (210) is located on the left side of the support (410), and the second cylinder (220) is located on the right side of the support (410). The first pull sleeve (230) is connected to the output end of the first cylinder (210) and is provided with a first pull groove (250) that runs through the front and back. The second pull sleeve (240) is connected to the output end of the second cylinder (220) and is provided with a second pull groove (260) that runs through the front and rear. When a portion of the first clamping assembly (420a) enters the first slot (250) and a portion of the second clamping assembly (420b) enters the second slot (260), the first cylinder (210) and the second cylinder (220) can drive the first clamping assembly (420a) and the second clamping assembly (420b) to move away from or towards each other.

6. A bottle cap stack conveyor line according to claim 5, characterized in that: The first cylinder (210) is connected to the conveyor belt (100) via a first adjusting component (600a) for adjusting the distance between the first cylinder (210) and the support seat (410); the second cylinder (220) is connected to the conveyor belt (100) via a second adjusting component (600b) for adjusting the distance between the second cylinder (220) and the support seat (410).

7. A bottle cap stacking conveyor line according to claim 6, characterized in that: The first adjustment assembly (600a) and / or the second adjustment assembly (600b) include a fixed base (610), a sliding base (620), and a locking lever (630). The fixed seat (610) is disposed on the conveyor belt (100); The sliding seat (620) is slidably disposed on the fixed seat (610), and the first cylinder (210) or the second cylinder (220) is disposed on the sliding seat (620); The locking wrench (630) is connected between the fixed seat (610) and the sliding seat (620) to limit the relative sliding between the fixed seat (610) and the sliding seat (620).

8. A bottle cap stack conveyor line according to claim 1, characterized in that: The second drive device (300) includes a first guide rail (310) and a second guide rail (320); The first guide rail (310) is disposed on the left side of the conveyor belt (100), and at least a portion of the first clamping assembly (420a) can enter into the first guide rail (310); The second guide rail (320) is disposed on the right side of the conveyor belt (100), and at least a portion of the second clamping assembly (420b) can enter into the second guide rail (320); The distance between the first guide rail (310) and the second guide rail (320) gradually increases along the conveying direction of the conveyor belt (100) so that the first clamping assembly (420a) and the second clamping assembly (420b) move away from each other.

9. A bottle cap stacking conveyor line according to claim 1, characterized in that: The first drive device (200) is configured as two sets and arranged at intervals along the conveying direction of the conveyor belt (100).

10. A bottle cap packaging machine, characterized in that: Includes the bottle cap stack conveyor line as described in any one of claims 1-9.

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