Bottle body pressing anti-rotation device

Abstract

The utility model discloses a bottle body pressing anti-rotation device, and relates to sealing equipment in the packaging field. The cap screwing device is simple in structure, can adapt to bottles of different structures and different characteristics, can stably hold the bottles in the cap screwing / unscrewing process, and plays a role in rotation prevention. The bottle body pressing anti-rotation device is installed on a rotating shaft of the cap screwing machine, a star wheel is fixedly installed on the upper portion of the rotating shaft, a fixing frame is fixedly installed in the middle of the rotating shaft, a cam is fixedly installed on the lower portion of the rotating shaft, a plurality of notches used for containing bottles are formed in the star wheel, and limiting steps are arranged in the notches. The cam is annular, and the upper surface of the cam arches upwards at the cap screwing station; the bottle body pressing anti-rotation devices correspond to the notches in the star wheel in a one-to-one mode, and each bottle body pressing anti-rotation device comprises a bottle support, a fixing base, a compression spring, a guide column and a rolling wheel. According to the method, the problem that tinplate bottles, thin-wall bottles and printing flower bottles cannot effectively restrain rotation is solved, and the method for preventing rotation by greatly increasing friction resistance without damaging bottle bodies is provided.

Description

Technical Field

[0001] This invention relates to sealing equipment in the field of packaging, and more particularly to bottle / can screw cap / twist cap sealing equipment. Background Technology

[0002] Currently, in capping machines, to ensure that the cap can be smoothly screwed onto the threaded part of the bottle neck, it is necessary to ensure that the bottle and the cap rotating equipment remain relatively stationary after the bottle enters the capping station. This requires an anti-rotation mechanism to be installed on the capping machine. Traditional anti-rotation mechanisms typically have the following arrangements:

[0003] Firstly, as Figure 1 As shown, an anti-rotation knife is used, with a sharp blade tip inserted into the end face of the bottle mouth (usually PET) to prevent rotation; however, this method is only suitable for bottle mouth materials such as PET that can be pierced by a blade tip, and is not suitable for hard materials such as iron and aluminum; in addition, during the capping process, the capping head needs to apply sufficient downward pressure to the bottle mouth to prevent slippage, and a large downward pressure will increase the friction between the cap and the bottle mouth, affecting the stability of the capping torque.

[0004] Second, as Figure 2 As shown, a clamp is used to hold the bottle mouth, and spring force is used to clamp the bottle mouth radially; however, this method is only suitable for bottles with a clamping position on the bottle body, and the bottle body is prone to rotation if the clamping force is insufficient. Therefore, in order to maintain the clamping force, the spring force is required to be high, which leads to easy wear of the cam. It cannot be used for bottles without a clamping position or bottles that cannot withstand radial clamping force.

[0005] Thirdly, as Figure 3 As shown, a belt is used to tighten the bottle body, utilizing the friction of the belt to prevent the bottle from slipping. However, this method is only suitable for bottles that can withstand the tightening force of the belt, and is not suitable for bottles that cannot withstand the pressure of the belt. Furthermore, it is prone to slipping on smooth, round bottles, and poses a risk of damage to pre-printed bottles.

[0006] In summary, traditional anti-rotation mechanisms all rely on external devices to provide resistance / friction to prevent the bottle from rotating. These mechanisms have different requirements for bottle mouth materials, structures, and rigidity. Therefore, optimizing the anti-rotation mechanism to adapt to bottles with different structures and characteristics has become a technical solution that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] To address the above problems, this invention proposes a bottle-pressing anti-rotation device that can adapt to bottles with different structures and characteristics. It can stably hold the bottle during the capping / tightening process and play a role in preventing rotation.

[0008] The technical solution of the present invention is as follows: the bottle body pressing anti-rotation device is installed on the rotating shaft 10 of the capping machine. The rotating shaft 10 has a star wheel 2 fixedly installed on the upper part, a fixed frame fixedly installed in the middle part, and a cam 9 fixedly installed on the lower part. The star wheel 2 has a plurality of slots for accommodating bottles, and the slots are provided with limiting steps. The cam 9 is annular, and its upper surface arches upward at the capping station.

[0009] The bottle-body clamping anti-rotation device corresponds one-to-one with the slots on the star wheel 2, including a bottle holder 4, a fixed base 5, a compression spring 6, a guide post, and a roller 8. The fixed base 5 is fixedly installed on the fixed frame and is located below its corresponding slot. A mounting post is provided below the bottle holder 4 and is integrated with it. The mounting post is installed through the fixed base 5, and a vertical receiving groove is opened at the bottom of the mounting post. The top of the guide post extends into the vertical receiving groove, and the compression spring 6 abuts between the bottom of the vertical receiving groove and the top of the guide post. The bottom of the guide post is rotatably connected to the roller 8, and the roller 8 travels on the upper surface of the cam 9.

[0010] Furthermore, a limiting bolt is installed through the bottom of the vertical receiving groove, and the limiting bolt is threadedly connected to the top of the guide post.

[0011] Furthermore, a return spring 7 is also fitted outside the fixed base 5, and an annular boss is provided on the side wall of the guide post. The return spring 7 rests between the fixed frame and the annular boss.

[0012] Furthermore, a protective plate 3 is fixedly installed on the capping machine frame on the outside of the star wheel 2, and the protective plate 3 has notches at the bottle inlet and bottle outlet stations.

[0013] This invention provides a novel anti-rotation method for high-hardness materials such as tinplate, aluminum, glass, and ceramic bottles. It is particularly suitable for thin-walled bottles / cans that cannot withstand radial external pressure, and also applicable to other bottle bodies that can withstand axial pressure, preventing the bottle body from rotating during the sealing process. It solves the problem of ineffective rotation suppression for tinplate bottles, thin-walled bottles, and printed bottles, providing a method to significantly increase frictional resistance and prevent rotation without damaging the bottle body. Furthermore, and importantly, in this invention, the clamping force of the bottle body is provided by the bottle holder and the star wheel, independent of the cap screw, effectively ensuring the stability of the cap screwing torque. Attached Figure Description

[0014] Figure 1 This is a background technical illustration of the case. Figure 1 ,

[0015] Figure 2 This is a background technical illustration of the case. Figure 2 ,

[0016] Figure 3 This is a background technical illustration of the case. Figure 3 ,

[0017] Figure 4 This is a structural diagram of the case.

[0018] Figure 5 This is a partial detail diagram of the case.

[0019] Figure 6 This is a schematic diagram illustrating the implementation method of this case;

[0020] In the diagram, 1 is the bottle body; 2 is the star wheel; 3 is the protective plate; 4 is the bottle holder; 5 is the fixing base; 6 is the compression spring; 7 is the return spring; 8 is the roller; 9 is the cam; and 10 is the rotating shaft. Detailed Implementation

[0021] To clearly illustrate the technical features of this patent, the following detailed description is provided through specific embodiments and in conjunction with the accompanying drawings.

[0022] The design principle of this case is as follows: considering the frictional force f=μ*F, without increasing the frictional coefficient u, this case increases the axial force F by lifting the bottle support and pressing it from the top, thereby increasing the frictional force f and achieving a stable anti-rotation effect.

[0023] like Figure 4 As shown, the left side is the anti-rotation state after lifting and pressing, and the right side is the state before lifting for bottle loading and unloading;

[0024] The bottle body pressing anti-rotation device is installed on the rotating shaft 10 of the capping machine. The rotating shaft 10 has a star wheel 2 fixedly installed on the upper part, a fixed frame fixedly installed in the middle part, and a cam 9 fixedly installed on the lower part. The star wheel 2 has a number of slots for accommodating bottles, and the slots are provided with limiting steps. The cam 9 is annular, and its upper surface arches upward at the capping station.

[0025] The bottle-body clamping anti-rotation device corresponds one-to-one with the slots on the star wheel 2, including a bottle holder 4, a fixed base 5, a compression spring 6, a guide post, and a roller 8. The fixed base 5 is fixedly installed on the fixed frame and is located below its corresponding slot. A mounting post is provided below the bottle holder 4 and is integrated with it. The mounting post is installed through the fixed base 5, and a vertical receiving groove is opened at the bottom of the mounting post. The top of the guide post extends into the vertical receiving groove, and the compression spring 6 abuts between the bottom of the vertical receiving groove and the top of the guide post. The bottom of the guide post is rotatably connected to the roller 8, and the roller 8 travels on the upper surface of the cam 9.

[0026] In addition, a limiting bolt is installed through the bottom of the vertical receiving groove, and the limiting bolt is threaded to the top of the guide post. In this way, on the one hand, the relative displacement between the guide post and the connecting post is limited by the limiting bolt, and on the other hand, it can also provide a stable preload for the compression spring 6.

[0027] A return spring 7 is also fitted outside the fixed base 5, and an annular boss is provided on the side wall of the guide post. The return spring 7 rests between the fixed base and the annular boss. This allows the roller 8 to maintain a better contact with the cam 9.

[0028] A protective plate 3 is also provided on the outside of the star wheel 2 and fixedly installed on the capping machine frame. The protective plate 3 has notches at the bottle inlet and bottle outlet stations.

[0029] The specific operation process in this case is as follows: As the rotating shaft 10 rotates, the star wheel 2 drives the bottle body 1 to move in the circumferential direction. During the process, the cam 9 provides the lifting stroke for the roller 8. When the bottle body 1 enters the capping station, the roller 8 drives the bottle support 4 and the bottle body 1 it supports to rise. After the upper part of the bottle body 1 contacts the limiting step in the star wheel 2, the roller 8 will continue to rise, causing the compression spring 6 to be further compressed. After the roller 8 reaches its stroke, the rise stops and the capping begins. At this time, under the joint pressure of the limiting step and the bottle support 4, sufficient friction is generated to prevent the bottle body from rotating. After the capping is completed, under the joint action of the return spring 7 and the cam 9, the bottle body 1 descends, disengages from the limiting step, the anti-rotation state is released, and the bottle returns to the right-side entry and exit state.

[0030] What makes this case special is that a liftable bottle holder 4 is installed under the star wheel; the star wheel with a limiting step is designed according to the bottle shape structure to ensure that the bottle can enter and exit smoothly, while ensuring that the bottle holder has sufficient friction to prevent rotation after being raised.

[0031] There are many specific ways to implement this invention. The above description is only a preferred embodiment of this invention. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of this invention, and these improvements should also be considered within the scope of protection of this invention.

Claims

1. A bottle-body clamping anti-rotation device, characterized in that, The bottle body pressing anti-rotation device is installed on the rotating shaft (10) of the capping machine. The rotating shaft (10) has a star wheel (2) fixedly installed on the upper part, a fixed frame fixedly installed in the middle part, and a cam (9) fixedly installed on the lower part. The star wheel (2) has several slots for accommodating bottles. The slots are provided with limiting steps. The cam (9) is annular, and its upper surface arches upward at the capping station. The bottle body pressing anti-rotation device corresponds one-to-one with the slot on the star wheel (2), including a bottle holder (4), a fixed seat (5), a compression spring (6), a guide post, and a roller (8). The fixed seat (5) is fixedly installed on the fixed frame and is located below its corresponding slot. The bottle holder (4) is provided with an integrated mounting post. The mounting post is installed through the fixed seat (5), and a vertical receiving groove is opened at the bottom of the mounting post. The top of the guide post extends into the vertical receiving groove, and the compression spring (6) abuts between the bottom of the vertical receiving groove and the top of the guide post. The bottom of the guide post is rotatably connected to the roller (8), and the roller (8) travels on the upper surface of the cam (9).

2. The bottle body clamping anti-rotation device according to claim 1, characterized in that, The bottom of the vertical receiving groove is also fitted with a limiting bolt, which is threaded to the top of the guide post.

3. The bottle body clamping anti-rotation device according to claim 1, characterized in that, A return spring (7) is also fitted outside the fixed base (5), and an annular boss is provided on the side wall of the guide post. The return spring (7) rests between the fixed frame and the annular boss.

4. The bottle body clamping anti-rotation device according to claim 1, characterized in that, A protective plate (3) is also provided on the outside of the star wheel (2) and fixedly installed on the capping machine frame. The protective plate (3) has notches at the bottle inlet and bottle outlet stations.

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