Bottle clamping and positioning device of cap screwing machine and cap screwing system

Abstract

The utility model relates to the technical field of filling equipment, and discloses a bottle clamping and positioning device of a cap screwing machine and a cap screwing system. The bottle clamping and positioning device of the cap screwing machine comprises a bottle feeding star wheel, a bottle clamping assembly and a protection plate assembly. An elastic clamp of the bottle clamping assembly comprises two clamping arms, the middle sections of the two clamping arms are connected through an elastic piece, one end of each clamping arm is rotationally connected with a rotating star wheel of the bottle clamping assembly, and a clamping space is formed by a gap between the other ends of the two clamping arms. A groove is formed in the periphery of the bottle feeding star wheel and used for containing a bottle body, and the bottle feeding star wheel can rotate and stir one clamping arm to rotate relative to the rotating star wheel so that the bottle body can be located in the clamping space. The protection plate assembly is arranged on the periphery of the bottle clamping assembly in a surrounding mode and comprises a first protection plate and a second protection plate, and the first protection plate is used for guiding the moving direction of the bottle body when the elastic piece rotates to the first position so that the bottle body in the groove can enter the clamping space; and the second protection plate is used for pressing the bottle body in the clamping space when the elastic piece rotates to the second position.

Description

TECHNICAL FIELD

[0001] The utility model relates to filling equipment technical field especially relates to a kind of bottle clamping positioning device and cap screwing system of cap screwing machine. BACKGROUND

[0002] Cap screwing machine is used to tighten bottle cap on bottle body or screw bottle cap from bottle body, and cap screwing machine needs to ensure that bottle does not rotate when screwing cap. For the case that the bottle cap covers the bottle mouth support ring of special-shaped bottle, the positioning mechanism cannot be positioned through the bottle mouth, and can only be positioned by bottle body. However, due to the irregular shape of special-shaped bottle, the positioning mechanism is easy to scratch the bottle body, affecting production.

[0003] Therefore, a cap screwing machine bottle clamping positioning device and cap screwing system are needed to solve the above problems. INVENTION CONTENTS

[0004] One purpose of the utility model is to provide a cap screwing machine bottle clamping positioning device, which can solve the problem of positioning special-shaped bottle body, avoid scratching the bottle body during positioning process, and ensure production efficiency.

[0005] According to the above idea, the technical scheme adopted by the utility model is as follows:

[0006] A cap screwing machine bottle clamping positioning device is provided, which comprises:

[0007] A bottle clamping assembly comprises a rotating star wheel and an elastic clamp. The elastic clamp comprises two oppositely arranged clamp arms, the middle segments of the two clamp arms are connected by an elastic member, one end of the clamp arm is rotationally connected with the rotating star wheel, the other end of the clamp arm is used for abutting against the bottle body, and the spacing between the other ends of the two clamp arms forms a clamping space.

[0008] A bottle feeding star wheel is provided outside the periphery of the bottle feeding star wheel. The recess is used to accommodate the bottle body. The bottle feeding star wheel can rotate and move one of the clamp arms relative to the rotating star wheel to enable the bottle body to be located in the clamping space.

[0009] A guard plate assembly is provided around the periphery of the bottle clamping assembly. The guard plate assembly comprises a first guard plate and a second guard plate. The first guard plate is used to guide the movement direction of the bottle body when the elastic member rotates to the first position, so that the bottle body in the recess can enter the clamping space. The second guard plate is used to press the bottle body in the clamping space when the elastic member rotates to the second position.

[0010] Optionally, the elastic clamp further comprises two connecting plates and two fasteners. The two connecting plates are respectively connected to the two ends of the elastic member. The connecting plate is provided with a strip-shaped hole. One of the fasteners is arranged in one of the strip-shaped holes and connected with the clamp arm.

[0011] Optionally, the clamping arm is provided with a mounting groove, and the connecting plate is slidably arranged in the mounting groove.

[0012] Optionally, the elastic clamp further comprises a positioning pin arranged between the two clamping arms, and the positioning pin is used for abutting against one end of the clamping arm to limit the rotation angle of the clamping arm.

[0013] Optionally, the elastic clamp comprises a mounting plate, and the two clamping arms are rotationally connected with the mounting plate, and the mounting plate is adjustably arranged on the rotating star wheel.

[0014] Optionally, the rotating star wheel comprises a star wheel body, a column and a connecting piece, the connecting piece is in an annular structure, the connecting piece is coaxially arranged with the star wheel body through the column, the mounting plate is arranged on the connecting piece, and the star wheel body can rotate around its own axis.

[0015] Optionally, the guard plate assembly further comprises a support, the support is in an annular structure with a notch, the first guard plate has two, the two first guard plates are oppositely arranged on the support along the radial direction of the support and are located at the notch, and the bottle body enters or exits the clamping space through the notch.

[0016] Optionally, the support is provided with a first fixing hole, the first guard plate is provided with a first through hole, a first fixing member of the guard plate assembly passes through the first through hole and is fixed in the first fixing hole, and the position of the first fixing member in the first through hole is adjustable.

[0017] Optionally, the support is provided with a second fixing hole, the second guard plate is provided with a second through hole, a second fixing member of the guard plate assembly passes through the second through hole and is fixed in the second fixing hole, and the position of the second fixing member in the second through hole is adjustable.

[0018] Another purpose of the utility model is to provide a cap screwing system, which can solve the problem of positioning of special-shaped bottles, avoid scratching the bottles during positioning, and ensure production efficiency.

[0019] According to the above idea, the technical scheme adopted by the utility model is as follows:

[0020] The utility model provides a cap screwing system, which comprises a cap screwing machine and the cap screwing machine bottle clamping and positioning device, the cap screwing machine is located above the cap screwing machine bottle clamping and positioning device, and the cap screwing machine is used for screwing a cap on a bottle body or unscrewing the cap from the bottle body when the bottle body is fixed in a clamping space.

[0021] The utility model has the advantages of:

[0022] The utility model discloses a cap screwing machine bottle clamping positioning device, including bottle star wheel, bottle clamping subassembly and baffle subassembly. The outer periphery of bottle star wheel is provided with recess, and the recess is used for accommodating bottle body, and bottle star wheel can rotate around its own axial, thereby driving bottle body in recess to move. Bottle clamping subassembly includes rotary star wheel and elastic clamp, and the elastic clamp includes two clamping arms oppositely arranged, and the middle section of two clamping arms is connected through elastic element, and one end of clamping arm is rotatably connected with rotary star wheel, and the other end of clamping arm is used for abutting against bottle body, and the interval between the other end of two clamping arms forms clamping space. Baffle subassembly is peripherally arranged at bottle clamping subassembly, and baffle subassembly includes first baffle and second baffle, and rotary star wheel can rotate around its own axial, when rotary star wheel drives elastic clamp to rotate to first position, bottle star wheel will abut with one clamping arm of elastic element, and because two clamping arms are connected through elastic element, with the continuous rotation of bottle star wheel, one clamping arm will be pushed to rotate to the direction of far away from another clamping arm, to make the clamping space between two clamping arms larger. When elastic clamp rotates to first position, elastic element will also be located at the guide surface of first baffle, and bottle body abuts with the guide surface of first baffle, and offsets to the side of elastic element along the guide surface of first baffle, to further enter larger clamping space under the drive of rotary star wheel. When rotary star wheel drives the elastic clamp to continuously leave first position, the pressing of bottle star wheel to the elastic element is released, and bottle body has completely entered clamping space under the continuous guide of first baffle, and is clamped between two clamping arms limited by the connection of elastic element to two clamping arms. With the continuous rotation of rotary star wheel, when rotary star wheel drives the elastic element to rotate to second position, the elastic element is at second baffle, and second baffle and two clamping arms of elastic clamp jointly act to fix bottle body in clamping space. At this time, the position of bottle body is fixed, and the cap screwing machine can be driven to screw the bottle cap on bottle body or unscrew the bottle cap from bottle body, and the cooperation of elastic clamp and baffle subassembly can avoid scratching bottle body during positioning, and ensure production efficiency.

[0023] The utility model discloses a cap screwing system, including cap screwing machine and above-mentioned cap screwing machine bottle clamping positioning device, and cap screwing machine is set up in the top of cap screwing machine bottle clamping positioning device, and cap screwing machine is used for when bottle body is fixed in clamping space, screw the bottle cap on bottle body or unscrew the bottle cap from bottle body, and the cooperation of elastic clamp and baffle subassembly can avoid scratching bottle body during positioning, and ensure production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure schematic diagram of cap screwing machine bottle clamping positioning device and bottle body provided by the utility model embodiment;

[0025] Figure 2 It is the partial section view of cap screwing machine bottle clamping positioning device and bottle body provided by the utility model embodiment;

[0026] Figure 3is a structural schematic view of the bottle body provided by the embodiment of the utility model;

[0027] Figure 4 is a structural schematic view of the elastic member and the bottle body provided by the embodiment of the utility model;

[0028] Figure 5 is a partial sectional view of the elastic member provided by the embodiment of the utility model.

[0029] In the drawing,

[0030] 1, bottle entering star wheel; 11, groove;

[0031] 2, bottle clamping assembly; 20, clamping space; 21, rotating star wheel; 211, star wheel main body; 212, stand; 213, connecting piece; 22, elastic clamp; 221, clamping arm; 2211, mounting groove; 222, elastic member; 223, connecting plate; 224, positioning pin; 225, mounting plate;

[0032] 3, guard plate assembly; 31, supporting piece; 32, first guard plate; 33, second guard plate;

[0033] 100, bottle body. DETAILED DESCRIPTION

[0034] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model is further illustrated below by specific implementation manners in combination with the drawings. It can be understood that the specific embodiments described here are only used for explaining the utility model, and not limited to the utility model. In addition, it needs to be explained that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings, not all.

[0035] In the description of the utility model, unless another explicit specification and limitation, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] In the utility model, unless another definite provision and limitation, first feature is "on" or "under" second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them. Moreover, first feature "on", "above" and "upper surface of" second feature includes that first feature is directly above and obliquely above second feature, or only indicates that horizontal height of first feature is higher than second feature. First feature "under", "below" and "under surface of" second feature includes that first feature is directly below and obliquely below second feature, or only indicates that horizontal height of first feature is less than second feature.

[0037] In the description of the present embodiment, the terms "upper", "lower", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0038] The technical scheme of the utility model will be further illustrated below by specific embodiments in combination with the drawings.

[0039] As Figures 1 to 5As shown, the embodiment provides a bottle positioning device for cap screwing machine, which comprises a bottle feeding star wheel 1, a bottle clamping assembly 2 and a guard plate assembly 3. The outer periphery of the bottle feeding star wheel 1 is provided with a groove 11 for accommodating a bottle body 100, and the bottle feeding star wheel 1 can rotate around its own axis to move the bottle body 100 in the groove 11. The bottle clamping assembly 2 comprises a rotating star wheel 21 and an elastic clamp 22, the elastic clamp 22 comprises two clamping arms 221 oppositely arranged, the middle segments of the two clamping arms 221 are connected by an elastic member 222, one end of the clamping arm 221 is rotationally connected with the rotating star wheel 21, the other end of the clamping arm 221 is used for abutting against the bottle body 100, and the interval between the other ends of the two clamping arms 221 forms a clamping space 20. The guard plate assembly 3 is arranged around the outer periphery of the bottle clamping assembly 2, and the guard plate assembly 3 comprises a first guard plate 32 and a second guard plate 33. The rotating star wheel 21 can rotate around its own axis, when the rotating star wheel 21 drives the elastic clamp 22 to rotate to a first position, the bottle feeding star wheel 1 will abut against one clamping arm 221 of the elastic member 222, since the two clamping arms 221 are connected by the elastic member 222, with the continuous rotation of the bottle feeding star wheel 1, one clamping arm 221 will be pushed to rotate away from the other clamping arm 221, so that the clamping space 20 between the two clamping arms 221 becomes larger. When the elastic clamp 22 rotates to the first position, the elastic member 222 is also located at the guide surface of the first guard plate 32, the bottle body 100 abuts against the guide surface of the first guard plate 32 and deviates to the side of the elastic member 222 along the guide surface of the first guard plate 32, so as to further enter the larger clamping space 20 under the driving of the rotating star wheel 21. When the rotating star wheel 21 drives the elastic clamp 22 to continuously move away from the first position, the abutting pressure of the bottle feeding star wheel 1 on the elastic member 222 is released, and the bottle body 100 has completely entered the clamping space 20 under the continuous guidance of the first guard plate 32, and the bottle body 100 will be clamped between the two clamping arms 221 due to the connection of the elastic member 222 to the two clamping arms 221. With the continuous rotation of the rotating star wheel 21, when the rotating star wheel 21 drives the elastic member 222 to rotate to a second position, the elastic member 222 is at the second guard plate 33, and the second guard plate 33 and the two clamping arms 221 of the elastic clamp 22 jointly fix the bottle body 100 in the clamping space 20. At this time, the position of the bottle body 100 is fixed, and the cap screwing machine can be driven to screw the cap on the bottle body 100 or unscrew the cap from the bottle body 100, and the arrangement of the elastic clamp 22 can avoid scratching the bottle body 100 during positioning, thereby ensuring the production efficiency.

[0040] In this embodiment, N grooves 11 are arranged on the outer periphery of the bottle feeding star wheel 1, and N elastic clamps 22 are arranged on the circumferential direction of the rotating star wheel 21, and each elastic clamp 22 is opened by the bottle feeding star wheel 1 when rotating to the first position, so that the bottle body 100 enters the clamping space 20 between the two clamp arms 221, and when the elastic clamp 22 continues to rotate to the second position, the force of the bottle feeding star wheel 1 on the clamp arms 221 disappears, and the force of the elastic member 222 on the two clamp arms 221 to make them close to each other will make the bottle body 100 clamped by the clamp arms 221, and at the same time, the bottle body 100 is fixed by the three-direction force limited by the pressing of the second guard plate 33 in the radial direction of the rotating star wheel 21.

[0041] Optionally, as shown in Figure 3 The guard plate assembly 3 further includes a support member 31, which is an annular structure with a notch, and two first guard plates 32 are arranged on the support member 31 in the radial direction of the support member 31 and are located at the notch, i.e. one first guard plate 32 is located at the bottle feeding position of the bottle clamping assembly 2, and the other first guard plate 32 is located at the bottle discharging position of the bottle clamping assembly 2. The second guard plate 33 is arranged between the two first guard plates 32, and the second guard plate 33 and the first guard plate 32 both have an abutting surface on the side facing the rotating star wheel 21, which abuts with the bottle body 100 in the radial direction of the rotating star wheel 21. The abutting surfaces of the first guard plate 32 and the second guard plate 33 are both arc surfaces and are located on the outer periphery of the same fitting circle.

[0042] Optionally, to adapt to different sizes of bottle bodies 100, the installation positions of the first guard plate 32 and the second guard plate 33 on the support member 31 are adjustable. The support member 31 is provided with a first fixing hole, the first guard plate 32 is provided with a first through hole, and the guard plate assembly 3 further includes a first fixing member which passes through the first through hole and is fixed in the first fixing hole. In this embodiment, the first fixing hole is a threaded hole, and the outer periphery of the first fixing member has external threads. The first fixing member passes through the first through hole and is screwed into the first fixing hole. The first through hole is a light hole with an inner diameter larger than the outer diameter of the first fixing member. If the size of the bottle body 100 is larger, the first guard plate 32 can be moved in the radial direction of the rotating star wheel 21 away from the center of the rotating star wheel 21, so that the fixed position of the first guard plate 32 is away from the elastic member 222 in the radial direction of the rotating star wheel 21. In other embodiments, the first through hole can also be a strip-shaped hole, and the same can be achieved when the first fixing member passes through the first through hole at different positions. The first fixing member can be fixed in the first fixing hole to ensure that the first guard plate 32 is connected with the support member 31, and the connection position of the two can be adjusted.

[0043] Optionally, the support 31 is provided with a second fixing hole, the second guard plate 33 is provided with a second through hole, and the guard plate assembly 3 further comprises a second fixing member which passes through the second through hole and is fixed in the second fixing hole. In the embodiment, the second fixing hole is a threaded hole, and the second fixing member has external threads on the outer periphery. The second fixing member passes through the second through hole and is screwed into the second fixing hole. The second through hole is a light hole with an inner diameter greater than the outer diameter of the second fixing member. If the size of the bottle body 100 is large, the second guard plate 33 can be moved away from the center of the rotating star wheel 21 along the radial direction of the rotating star wheel 21, so that the fixed position of the second guard plate 33 is away from the elastic member 222 in the radial direction of the rotating star wheel 21. In other embodiments, the second through hole can also be a strip-shaped hole. When the second fixing member passes through different positions in the second through hole, the second fixing member can be fixed in the second fixing hole to ensure that the second guard plate 33 is connected to the support 31, and the connection position of the two can be adjusted.

[0044] Further, as shown in Figure 4 and Figure 5 , the elastic member 222 further comprises two connecting plates 223 and two fasteners. The two connecting plates 223 are respectively connected to the two ends of the elastic member 222, the connecting plate 223 is provided with a strip-shaped hole, and one fastener passes through one strip-shaped hole and is connected with the clamping arm 221. That is, the two ends of the elastic member 222 are respectively connected to the corresponding clamping arm 221 through one connecting plate 223, and the connecting plate 223 and the clamping arm 221 are connected through the strip-shaped hole. That is, when the fastener passes through different positions in the strip-shaped hole, it can be fixed to the same fixed point on the clamping arm 221. In this way, the stretching degree of the elastic member 222 can be different due to the change of the distance between the two ends of the elastic member 222, so as to adapt to bottle bodies 100 of different sizes.

[0045] Optionally, the clamping arm 221 is provided with a mounting groove 2211, and the connecting plate 223 is slidably arranged in the mounting groove 2211. The mounting groove 2211 is used to limit the mounting position of the connecting plate 223. In specific implementation, the mounting groove 2211 is used to limit the movement direction of the connecting plate 223. Before the two ends of the elastic member 222 are fixed, the connecting plate 223 can be moved along the extension direction of the mounting groove 2211, so as to change the stretching degree of the elastic member 222. The provision of the mounting groove 2211 can ensure that the stress direction of the two clamping arms 221 does not change when the clamping force of the elastic clamp 22 is changed.

[0046] Further, the elastic clip 22 further comprises a positioning pin 224, which is arranged between the two clip arms 221 and used to abut against one end of the clip arms 221 to limit the rotation angle of the clip arms 221. In practice, the other end of the two clip arms 221, i.e. the clamping end, has a tendency to move close to each other under the action of the elastic member 222, while the clamping ends of the two clip arms 221 move away from each other when the bottle star wheel 1 abuts against one clip arm 221 to make it rotate. At this time, the one end of the two clip arms 221, i.e. the connecting end, moves close to each other until it abuts against the positioning pin 224, which can limit the two connecting ends before they interfere with each other, and also avoid the clip arms 221 from being stretched too much and unable to return to the original clamping state.

[0047] In the embodiment, the elastic clip 22 further comprises a mounting plate 225, and the two clip arms 221 are rotationally connected with the mounting plate 225, which is arranged on the rotating star wheel 21 in a position-adjustable manner. In practice, the positioning pin 224 is also arranged on the mounting plate 225. In addition, the rotating star wheel 21 is provided with a third fixed hole, and the mounting plate 225 is provided with a third through hole. The elastic clip 22 further comprises a third fixing member, which passes through the third through hole and is fixed in the third fixed hole. In the embodiment, the third fixing member is a threaded hole, and the outer periphery of the third fixing member has external threads. The third fixing member passes through the third through hole and is screw-connected in the third fixed hole. The third through hole is a light hole with an inner diameter larger than the outer diameter of the third fixing member. If the size of the bottle body 100 is large, the elastic clip 22 can be moved along the radial direction of the rotating star wheel 21 towards the side close to the center of the rotating star wheel 21, so that the fixed position of the elastic clip 22 is away from the guard plate assembly 3 in the radial direction of the rotating star wheel 21. In other embodiments, the third through hole can also be a strip-shaped hole, which can also ensure that the third fixing member can be fixed in the third fixed hole at multiple different positions when passing through the third through hole, so as to realize the position-adjustable connection between the elastic clip 22 and the rotating star wheel 21.

[0048] Alternatively, as shown in Figure 2 the rotating star wheel 21 comprises a star wheel body 211, a column 212 and a connecting member 213. The connecting member 213 is in the form of a ring structure, and is coaxially arranged with the star wheel body 211 through the column 212. The mounting plate 225 is arranged on the connecting member 213, and the star wheel body 211 can rotate around its own axis. In practice, the star wheel body 211 is connected with a driving member, and the driving member drives the star wheel body 211 to rotate around its own axis, so that the connecting member 213 rotates coaxially with the star wheel body 211 to drive the clamped bottle body 100 to move. In addition, the height of the column 212 can be determined according to the height of the bottle body 100, so that the connecting member 213 located above the star wheel body 211 can cooperate with the elastic clip 22 to clamp the bottle body 100 at a predetermined position.

[0049] The embodiment also provides a capping system, which comprises the capping machine and the bottle clamping and positioning device, the capping machine is arranged above the bottle clamping and positioning device, and the capping machine is used for screwing or unscrewing the bottle cap on the bottle body 100 when the bottle body 100 is fixed in the clamping space 20, and the elastic clamps 22 cooperated with the guard plate assembly 3 can avoid scratching the bottle body 100 in the positioning process, and ensure the production efficiency.

[0050] The above embodiments only illustrate the basic principles and characteristics of the present application, and the present application is not limited to the above embodiments. Without departing from the spirit and scope of the present application, various changes and modifications can be made to the present application, and these changes and modifications all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A bottle clamping and positioning device for a capping machine, characterized in that, include: The bottle clamping assembly (2) includes a rotating star wheel (21) and an elastic clamp (22). The elastic clamp (22) includes two clamping arms (221) arranged opposite to each other. The middle sections of the two clamping arms (221) are connected by an elastic element (222). One end of the clamping arm (221) is rotatably connected to the rotating star wheel (21). The other end of the clamping arm (221) is used to abut against the bottle body (100). The gap between the other ends of the two clamping arms (221) forms a clamping space (20). Bottle inlet star wheel (1), the outer periphery of the bottle inlet star wheel (1) is provided with groove (11), the groove (11) is used to accommodate bottle body (100), the bottle inlet star wheel (1) can rotate and push one of the clamping arms (221) to rotate relative to the rotating star wheel (21), so that the bottle body (100) can be located in the clamping space (20); A protective plate assembly (3) is disposed around the outer periphery of the bottle clamping assembly (2). The protective plate assembly (3) includes a first protective plate (32) and a second protective plate (33). The first protective plate (32) is used to guide the movement direction of the bottle (100) when the elastic member (222) rotates to the first position, so that the bottle (100) in the groove (11) can enter the clamping space (20). The second protective plate (33) is used to press the bottle (100) against the clamping space (20) when the elastic member (222) rotates to the second position.

2. The bottle clamping and positioning device for a capping machine according to claim 1, characterized in that, The elastic clamp (22) also includes two connecting plates (223) and two fasteners. The two connecting plates (223) are respectively connected to the two ends of the elastic member (222). The connecting plates (223) are provided with strip holes. One of the fasteners passes through one of the strip holes and is connected to the clamp arm (221).

3. The bottle clamping and positioning device for a capping machine according to claim 2, characterized in that, The clamping arm (221) is provided with a mounting groove (2211), and the connecting plate (223) can be slidably disposed in the mounting groove (2211). The mounting groove (2211) is used to limit the installation position of the connecting plate (223).

4. The bottle clamping and positioning device for a capping machine according to claim 1, characterized in that, The elastic clamp (22) also includes a positioning pin (224), which is disposed between the two clamping arms (221). The positioning pin (224) is used to abut one end of the clamping arm (221) to limit the rotation angle of the clamping arm (221).

5. The bottle clamping and positioning device for a capping machine according to claim 1, characterized in that, The elastic clamp (22) includes a mounting plate (225), and the two clamping arms (221) are rotatably connected to the mounting plate (225). The mounting plate (225) is adjustablely positioned on the rotating star wheel (21).

6. The bottle clamping and positioning device for a capping machine according to claim 5, characterized in that, The rotating star wheel (21) includes a connected star wheel body (211), a column (212), and a connector (213). The connector (213) has a ring structure and is coaxially arranged with the star wheel body (211) through the column (212). The mounting plate (225) is disposed on the connector (213). The star wheel body (211) can rotate around its own axis.

7. The bottle clamping and positioning device for a capping machine according to claim 1, characterized in that, The protective plate assembly (3) further includes a support member (31), which is an annular structure with a notch. There are two first protective plates (32), which are arranged opposite to each other on the support member (31) along the radial direction and are both located at the notch. The bottle (100) enters or leaves the clamping space (20) through the notch.

8. The bottle clamping and positioning device for a capping machine according to claim 7, characterized in that, The support member (31) is provided with a first fixing hole, the first guard plate (32) is provided with a first through hole, the first fixing member of the guard plate assembly (3) passes through the first through hole and is fixed in the first fixing hole, and the position of the first fixing member in the first through hole is adjustable.

9. The bottle clamping and positioning device for a capping machine according to claim 7, characterized in that, The support member (31) is provided with a second fixing hole, and the second guard plate (33) is provided with a second through hole. The second fixing member of the guard plate assembly (3) passes through the second through hole and is fixed in the second fixing hole. The position of the second fixing member in the second through hole is adjustable.

10. A capping system, characterized in that, The device includes a capping machine and a capping machine bottle clamping and positioning device as described in any one of claims 1 to 9. The capping machine is located above the capping machine bottle clamping and positioning device. The capping machine is used to tighten the cap onto the bottle body (100) or unscrew the cap off the bottle body (100) when the bottle body (100) is fixed in the clamping space (20).

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