Split shield and film stretching apparatus

Abstract

The application provides a split protective cover and a film stretching device. The split protective cover provided by the application is detachable from four directions, i.e., front, back, left and right, and the combination of the bottom plate and the transverse protective member and the combination of the bottom plate and the longitudinal protective member adopt a pulling type structure, so that the bottom plate and the split protective cover can be flexibly detached from the four directions, and the split protective cover with the split structure avoids the inconvenience of heavy equipment disassembly; further, by arranging a hanging structure, a pair of longitudinal protective members and a pair of transverse protective members can be temporarily hung on the top plate through the hanging structure, so that the convenience and safety of disassembly can be improved; in addition, after removing any target protective member, the remaining three protective members can constrain each other, preventing the split protective cover from deforming or falling after removing part of the protective members, so that the stability and safety of disassembly can be ensured.

Description

Technical Field

[0001] This application relates to the field of film stretching technology, and in particular to a split protective cover and film stretching equipment. Background Technology

[0002] In stretch film production lines used in the plastics processing industry, one of the many pieces of equipment is called a "film clamping device," which plays a crucial role in guiding the film to the recycling unit. During the operation of film stretching machines, a protective cover for the film clamping device needs to be designed to ensure safe production, but currently, a series of challenging problems exist. The most common method of installing the protective cover is to directly cover the working device (i.e., the film clamping device) from above. However, for working devices that are installed upside down on the factory roof using fasteners, this protective design reveals many shortcomings.

[0003] Currently, protective covers are generally divided into two main categories: integral protective covers and split protective covers. Integral protective covers, while relatively simple in structure, are quite heavy. When maintenance or replacement of the working device is required, large protective covers generally require hoisting equipment to lift and disassemble them as a whole from above the working device, making disassembly extremely difficult. This not only consumes a lot of manpower and resources but may also lead to prolonged equipment downtime, affecting production efficiency. Split protective covers are generally installed on a frame structure. Although the split design solves the problem of difficult disassembly of integral protective covers to some extent, it introduces new challenges. Determining the frame size is a critical step. If the frame is too small, it will directly hinder the daily use and maintenance of the membrane clamping device; if the frame is too large, it will not only significantly increase the overall size of the protective cover, making it unsuitable in scenarios with limited installation space, but also significantly increase the complexity of design and installation. Furthermore, limited installation space is also reflected in the fact that split protective covers can be obstructed by surrounding equipment, pipelines, and factory building structures, making disassembly in one or more directions inconvenient.

[0004] If a split-type protective cover lacks a supporting frame structure, the remaining portion will deform significantly when disassembling a section. For split-type protective covers installed by hoisting, this deformation will make reinstallation difficult. Furthermore, due to the lack of a supporting frame structure, the split-type protective cover may also be misaligned due to a lack of positioning, sometimes requiring multiple attempts to install it correctly. These problems with traditional protective cover designs become increasingly prominent, especially as the span of the membrane clamping device increases. Therefore, there is an urgent need for a split-type protective cover that is easy to disassemble and provides good stability during assembly and disassembly to meet the specific requirements of hoisting membrane clamping devices. Summary of the Invention

[0005] In view of this, this application provides a split-type protective cover and a film stretching device, which provides a protective cover that is easy to assemble and disassemble and has good stability during assembly and disassembly.

[0006] Specifically, this application is implemented through the following technical solution:

[0007] The first aspect of this application provides a split-type protective cover for mounting on an inverted membrane clamping device; the split-type protective cover includes a pair of longitudinal protective members, a pair of transverse protective members, a bottom plate, and a top plate; wherein...

[0008] The pair of longitudinal protective members are arranged opposite each other in a first direction extending along the clamping roller of the film clamping device; each of the longitudinal protective members includes a longitudinal plate and a first linear guide assembly disposed at the bottom end of the longitudinal plate;

[0009] The pair of transverse protective members are arranged opposite each other along a second direction perpendicular to the first direction and are disposed at both ends of the pair of longitudinal protective members; each of the transverse protective members includes a horizontal plate and a second linear guide assembly disposed at the bottom end of the horizontal plate.

[0010] A discharge port is formed on the base plate, which is arranged along the bottom surface surrounded by the pair of longitudinal protective members and the pair of transverse protective members. The base plate can be inserted into any one of the pair of first linear guide components and the pair of second linear guide components, and can move along the pair of target linear guide components to the installation position. It is fixed to the pair of longitudinal protective members by a first fixing component that matches the pair of first linear guide components, and fixed to the pair of transverse protective members by a second fixing component that matches the pair of second linear guide components, thereby together with the pair of longitudinal protective members and the pair of transverse protective members to surround the film clamping device.

[0011] A feed inlet is formed on the top plate; the top plate is also provided with a fixing structure and a hanging structure. The fixing structure is used to fix the pair of longitudinal protective members and the pair of transverse protective members to the top plate when in the working state, and the hanging structure is used to hang the pair of longitudinal protective members and the pair of transverse protective members to the top plate when in the loading and unloading state.

[0012] Among them, any one of the pair of longitudinal protective members and the pair of transverse protective members can be disassembled in a direction away from the base plate when the base plate is in the installation state, and after the target protective member is removed, the base plate and the remaining three protective members other than the target protective member can prevent the split protective cover from deforming or falling off through mutual restraint.

[0013] In a second aspect of the present application, a film stretching apparatus is provided, which comprises a film clamping device and the split protective cover according to any one of the first aspect of the present application; wherein,

[0014] a top plate of the split protective cover is mounted on a steel beam encasement below a cross beam of a plant; the steel beam encasement is a steel structure that surrounds at least two surfaces of the cross beam and is connected to the cross beam by anchoring;

[0015] the film clamping device is inversely mounted on the top plate, so that the film clamping device is covered by the split protective cover; wherein, the film clamping device is configured to guide a film, which penetrates into the film clamping device from above the cross beam through a gap on the cross beam and a feed inlet on the top plate, to a discharge outlet on a bottom plate of the split protective cover and penetrate out through the discharge outlet.

[0016] The split protective cover and the film stretching apparatus provided by the present application have the following advantages: First, since protective members in four directions of front, rear, left and right of the split protective cover are all designed to be detachable, and the combination of the bottom plate and a transverse protective member and the combination of the bottom plate and a longitudinal protective member adopt a drawing structure (that is, the bottom plate can be pulled out and inserted), the bottom plate and the split protective cover can be flexibly disassembled and assembled from four directions of front, rear, left and right; Second, by providing a hanging structure, a pair of longitudinal protective members and a pair of transverse protective members can be temporarily hung on the top plate through the hanging structure, which can improve the convenience and safety of disassembly and assembly; Third, after any target protective member is removed, the remaining three protective members can form a stable C-shaped structure, which enables mutual constraint between all components, effectively prevents the split protective cover from deforming or falling after part of the protective members are removed, and ensures the stability and safety of the overall structure; Fourth, the transverse protective member and the longitudinal protective member are composed of transverse plates and longitudinal plates, and the mass of each transverse plate and each longitudinal plate is designed to be less than 20kg, which is within the bearing capacity of manual disassembly, so there is no need to integrally disassemble the heavy protective cover, which facilitates manual disassembly; Fifth, the longitudinal plate is provided to be composed of longitudinal plate units, and the middle longitudinal plate units have the same size, can be interchanged during installation, have no special requirements for positions, which facilitates installation and also facilitates mass processing. Description of Drawings

[0017] Figure 1 is a schematic diagram of a split protective cover provided in Embodiment 1 of the present application;

[0018] Figure 2 is a partial schematic diagram of the split protective cover provided in Embodiment 1 of the present application;

[0019] Figure 3 is an exploded view of the split protective cover provided in Embodiment 1 of the present application;

[0020] Figure 4 This is a partial schematic diagram of the top plate provided in Embodiment 1 of this application;

[0021] Figure 5 This is a diagram showing the fit between the linear guide component and the fixing component provided in Embodiment 2 of this application;

[0022] Figure 6 A diagram showing the mating relationship between another linear guide component and a fixing component provided in Embodiment 2 of this application;

[0023] Figure 7 This is a diagram showing the fit between the linear guide assembly and the fixing assembly provided in Embodiment 3 of this application;

[0024] Figure 8 This is a partial schematic diagram of the split-type protective cover provided in Embodiment 4 of this application;

[0025] Figure 9 This is a schematic diagram of the split-type protective cover provided in Embodiment 5 of this application;

[0026] Figure 10 This is a schematic diagram of the split-type protective cover provided in Embodiment Six of this application;

[0027] Figure 11 This is a partial schematic diagram of a split-type protective cover provided in Embodiment 7 of this application;

[0028] Figure 12 This is a partial schematic diagram of another split-type protective cover provided in Embodiment 7 of this application;

[0029] Figure 13 This is a schematic diagram of the film stretching apparatus provided in Embodiment 8 of this application;

[0030] Explanation of reference numerals in the attached figures:

[0031] 1: Longitudinal protective components;

[0032] 2: Lateral protective components;

[0033] 3: Base plate;

[0034] 4: Top slab;

[0035] 5: Thin film clamping device;

[0036] 6: Hopper;

[0037] 7: Crossbeam;

[0038] 8: Steel-clad beams;

[0039] 11: Longitudinal plate;

[0040] 12: First linear guide assembly;

[0041] 13: Through-hole array;

[0042] 14: Sheath;

[0043] 15: Penetration part;

[0044] 121: Open terminal below;

[0045] 122: Open terminal at the top;

[0046] 21: Horizontal board;

[0047] 22: Second linear guide assembly;

[0048] 31: Discharge port;

[0049] 32: Depression;

[0050] 33: Convex part;

[0051] 34: Fixed components;

[0052] 41: Feed inlet;

[0053] 42: Hanging assembly;

[0054] 43: Support components;

[0055] 51: Pinch roller;

[0056] 421: Z-type hanging component;

[0057] 431: Support plate. Detailed Implementation

[0058] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0059] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used herein are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0060] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0061] The following specific embodiments are given to illustrate the technical solution of this application in detail.

[0062] Example 1:

[0063] Figure 1 This is a schematic diagram of the split-type protective cover provided in Embodiment 1 of this application. Figure 2 This is a partial schematic diagram of the split-type protective cover provided in Embodiment 1 of this application. Figure 3 This is an exploded view of the split-type protective shield provided in Embodiment 1 of this application. Please also refer to... Figures 1 to 3 The split-type protective cover provided in this embodiment is used to cover an inverted film clamping device; the split-type protective cover includes a pair of longitudinal protective members 1, a pair of transverse protective members 2, a bottom plate 3, and a top plate 4; wherein,

[0064] The pair of longitudinal protective members 1 are arranged opposite each other along a first direction (left-right direction) extending from the clamping roller 51 of the film clamping device 5; each of the longitudinal protective members 1 includes a longitudinal plate 11 and a first linear guide assembly 12 disposed at the bottom end of the longitudinal plate 11.

[0065] The pair of transverse protective members 2 are arranged opposite each other along a second direction (front-back direction) perpendicular to the first direction and are disposed at both ends of the pair of longitudinal protective members 1; each of the transverse protective members 2 includes a horizontal plate 21 and a second linear guide assembly 22 disposed at the bottom end of the horizontal plate;

[0066] The base plate 3 has a discharge port 31, and the base plate 3 is arranged along the bottom surface surrounded by the pair of longitudinal protective members 1 and the pair of transverse protective members 2; the base plate 3 can insert into any pair of target linear guide components 12 and 22, and move along the pair of target linear guide components to the installation position, and is fixed by a first fixing component that matches the pair of first linear guide components 12. Figures 1 to 3 (Not shown) is fixed to the pair of longitudinal guard members 1, and by a second fixing component (not shown) that matches the pair of second linear guide assemblies 22. Figures 1 to 3(Not shown) is fixed to the pair of transverse protective members 2, so that together with the pair of longitudinal protective members 1 and the pair of transverse protective members 2, it surrounds the film clamping device 5;

[0067] A feed inlet 41 is formed on the top plate 4; the top plate 4 is also provided with a fixing structure (not shown in the figure) and a hanging structure. The fixing structure is used to fix the pair of longitudinal protective members 1 and the pair of transverse protective members 2 to the top plate 3 when in the working state, and the hanging structure is used to hang the pair of longitudinal protective members 1 and the pair of transverse protective members 2 on the top plate 4 when in the loading and unloading state.

[0068] Among them, any one of the pair of longitudinal protective members 1 and the pair of transverse protective members 2 can be disassembled in the horizontal plane away from the base plate 3 when the base plate 3 is in the installation state, and after the target protective member is removed, the base plate 3 and the remaining three protective members other than the target protective member can prevent the split protective cover from deforming or falling off through mutual restraint.

[0069] Specifically, the film clamping device 5 is responsible for clamping the film and stably guiding it to the subsequent process or recycling device.

[0070] It should be noted that, in order to ensure the safe operation of the film clamping device 5, a split protective cover needs to be installed outside the film clamping device 5. This split protective cover needs to meet the following requirements:

[0071] 1. Requirements for disassembly direction: The entire split protective cover must be able to be disassembled and assembled from four directions: front, back, left, and right. If there is a hopper 6 obstructing the bottom, disassembly and assembly from the bottom is not allowed (if there is no hopper 6, disassembly and assembly from the bottom is also allowed).

[0072] 2. Requirements for disassembly method: Since the membrane clamping device 5 is large in size, the split protective cover needs to be large in size. At this time, due to its large span (the width and length of the split protective cover exceed 1.8m, and the wall thickness generally does not exceed 3mm), large weight (the weight of the split protective cover exceeds 90kg), obstruction from the surrounding structure, and lack of external lifting equipment, it is not convenient to disassemble it as a whole. Therefore, the split protective cover needs to be disassembled and assembled in parts.

[0073] 3. Requirements for split structure design: The front and rear protective components need to be divided into multiple sub-parts. If the dimensions of each sub-part are inconsistent, it is easy to cause processing errors, misassembly, etc. Too many sub-parts will result in a large workload for assembly and disassembly. Too few sub-parts with large sub-part structural dimensions will increase the labor intensity of assembly and disassembly. Therefore, it is necessary to reasonably set the size and number of sub-parts.

[0074] 4. Deformation Control Requirements: If the split-type protective cover undergoes significant deformation (e.g., deformation exceeding 5mm), it will affect installation. In such cases, the deformed area will need to be manually compressed before the cover is repositioned. Significant deformation of the split-type protective cover will complicate the hoisting and disassembly process. In other words, the split-type protective cover needs to be designed with a short length and certain plate thickness to ensure sufficient rigidity and prevent excessive deformation.

[0075] 5. Ease of disassembly and assembly, and safety requirements: Since the split protective cover is disassembled and assembled by hoisting, necessary auxiliary disassembly and assembly structures are required to reduce the labor intensity of disassembly and assembly, and improve the ease of disassembly and assembly and safety.

[0076] To clearly explain this application, a brief description of the film clamping device 5 will be given below. Specifically, the film clamping device 5 consists of two clamping rollers 51, one of which is a fixed clamping roller and the other is a movable clamping roller.

[0077] Furthermore, two parallel cylinders on both sides of the clamping roller 51 push the bearing seats on both sides of the moving roller to move synchronously, thereby clamping the film.

[0078] The following is a description of the split-type protective shield provided in this application:

[0079] For details, please continue to refer to... Figure 2 A pair of longitudinal protective members 1 are disposed on both sides of the film clamping device 5 and are arranged opposite each other along the first direction extending from the clamping roller 51 of the film clamping device 5.

[0080] Furthermore, each of the longitudinal protective components 1 includes a longitudinal plate 11 and a first linear guide assembly 12 disposed at the bottom end of the longitudinal plate 11. The longitudinal plate 11 is composed of multiple longitudinal plate units 11 spliced ​​together along a first direction. The longitudinal plate units can be further subdivided into a central longitudinal plate unit and two side longitudinal plate units. The longitudinal plate on the cylinder side has holes on its side longitudinal plate units that are larger than the outer contour dimension of the cylinder's cross-section to avoid the parallel cylinder. The longitudinal plate on the motor side has open side longitudinal plate units that are open to avoid the motor, facilitate wiring, aid in motor heat dissipation, or facilitate observation of the internal operation of the diaphragm clamping device, with the avoidance dimension being larger than the outer contour dimension of the motor's length direction.

[0081] Specifically, the exact number of longitudinal plate units is set according to actual needs, and this embodiment does not limit it. In practice, the number of longitudinal plate units can be set according to the length data of the film clamping device 5 in the first direction.

[0082] It is understandable that the dimensions of the longitudinal plate units on both sides are generally different, while the longitudinal plate units in the middle are generally set to the same size in order to achieve standardization and mass production.

[0083] Understandably, by setting different numbers of longitudinal plate units for different models of the film clamping device 5, the length of the longitudinal protective component 1 can be flexibly adjusted, allowing the split protective cover to better adapt to different application scenarios and improve overall adaptability and flexibility. At the same time, by splicing multiple longitudinal plate units to obtain the longitudinal plate, it is convenient to standardize and mass-produce the longitudinal plate units, thereby improving production efficiency and product quality.

[0084] Furthermore, the first linear guide assembly 12 provides a sliding track and support for the base plate 3. When it is necessary to disassemble or install the base plate 3, the base plate 3 can be moved in a specified direction through the first linear guide assembly 12.

[0085] In specific implementation, the first linear guide component 12 on the longitudinal plate 11 can move the base plate 3 along the first direction. It is understood that, firstly, the first linear guide component 12 provides support for the base plate 3, eliminating the need for additional support devices or manual assistance, thus simplifying the assembly and disassembly process and improving work efficiency; secondly, the first linear guide component 12 also provides guidance, allowing the base plate 3 to move in the first direction when sliding within it; thirdly, the first linear guide component 12 can also be used for base plate installation limiting. When the base plate 3 moves along the first direction, it encounters a "U"-shaped structure formed by a pair of first linear guide components and a second linear guide component, and is locked within the first and second linear guide components, ensuring that the base plate 3 can be accurately installed in the set position.

[0086] Specific embodiments will be given below to describe in detail the specific structure of the first linear guide component and the first fixing component that cooperates with it, which will not be repeated here.

[0087] For further details, please refer to [link / reference]. Figures 1 to 3 A pair of transverse protective members 2 are arranged opposite each other along a second direction perpendicular to the first direction. Each transverse protective member 2 includes a horizontal plate 21 and a second linear guide assembly 22 disposed at the bottom end of the horizontal plate 21.

[0088] Similarly, the second linear guide assembly 22 provides a sliding track and support for the base plate 3. When it is necessary to disassemble or install the base plate 3, the base plate 3 can be moved in the second direction through the second linear guide assembly 22. It should be noted that the second linear guide assembly 22 has the same function as the first linear guide assembly 12, which can provide support, guidance and installation limit for disassembling and installing the base plate 3.

[0089] Optional, please continue to refer to Figure 2 and Figure 3 In one possible implementation, each of the horizontal plates 21 is provided with an observation window.

[0090] Specifically, the observation window on the cross plate 21 allows an operator to directly observe the working conditions inside the split-type protective cover without opening the entire split-type protective cover.

[0091] Further, reinforcing ribs are provided on each of said cross plates and each of said longitudinal plates. In the hoisting split-type structure, since the split-type protective cover needs to bear a certain weight and stress, the addition of reinforcing ribs can effectively prevent the split-type protective cover from deforming or damaging due to being unable to withstand external forces, thereby ensuring the normal operation of the equipment and the safety of personnel.

[0092] It should be noted that the specific shape of the reinforcing ribs is set according to actual needs, which is not limited in this embodiment.

[0093] It can be understood that the observation window meets the operator's requirement of observing the internal conditions, and the reinforcing ribs fix the cross plates and longitudinal plates, ensuring the structural strength and stability of the transverse protective members and the longitudinal protective members.

[0094] It can be understood that a pair of longitudinal protective members 1 and a pair of transverse protective members 2 together form a four-sided fence-shaped protective cover, any one of the four sides can be disassembled independently. When any target protective member is removed, the remaining three protective members form a "匚"-shaped structure, and at this time, when the bottom plate 3 moves inside the structure, it can only translate toward the notch direction without other movements.

[0095] In addition, after any target protective member is removed, the remaining three protective members can form a stable "匚"-shaped structure, which enables mutual constraint between all components, effectively preventing the split-type protective cover from deforming or falling after partial protective members are removed, and ensuring the stability and safety of the overall structure.

[0096] Further, said bottom plate is arranged along the bottom surface enclosed by said pair of longitudinal protective members and said pair of transverse protective members; referring to the above description, said bottom plate can be inserted into any pair of target linear guide assemblies among the pair of first linear guide assemblies and the pair of second linear guide assemblies, move along said pair of target linear guide assemblies to the installation position, is fixed on said pair of longitudinal protective members by a first fixing assembly matching with said pair of first linear guide assemblies, and is fixed on said pair of transverse protective members by a second fixing assembly matching with said pair of second linear guide assemblies, so as to surround said film clamping device together with said pair of longitudinal protective members and said pair of transverse protective members.

[0097] In addition, a discharge opening 31 is provided on the bottom plate, the discharge opening 31 is located in the middle of the bottom plate 3, and is responsible for guiding the film processed by the nip rollers to be smoothly output to subsequent equipment.

[0098] Understandably, the discharge port 31 restricts the exit range of the film to prevent the film from being transported outside the equipment and affecting the factory environment; the discharge port 31 also determines the interface size of the inlet equipment of the next process step.

[0099] Furthermore, Figure 4 This is a partial schematic diagram of the top plate provided in Embodiment 1 of this application. Please refer to... Figure 4 The top plate is provided with a feed inlet, and the top plate is also provided with a fixing structure and a hanging structure. The fixing structure is used to fix the pair of longitudinal protective members and the pair of transverse protective members to the top plate when in the working state, and the hanging structure is used to hang the pair of longitudinal protective members and the pair of transverse protective members to the top plate when in the loading and unloading state.

[0100] Specifically, refer to Figure 3 and Figure 4 During installation, a pair of longitudinal protective members 1 and a pair of transverse protective members 2 can be temporarily suspended from the top plate 4 using a hanging structure. Then, a fixing structure (which can be screws or bolt holes) is used to secure the longitudinal and transverse protective members to the top plate. It is understood that the hanging assembly 42 supports the longitudinal protective member 1, and the support assembly 43 supports the transverse protective member 2. This eliminates the need for additional manual support of the longitudinal and transverse protective members 1 and 2 during subsequent fixing, improving installation convenience. Similarly, when disassembling the pair of longitudinal and transverse protective members, the fixing structure can be removed first. Due to the hanging structure, the pair of longitudinal and transverse plates remain suspended from the top plate, allowing workers to easily remove the parts that need to be disassembled from the top plate.

[0101] It should be noted that during disassembly and assembly, individual longitudinal plate units can be disassembled or installed one by one to complete the disassembly and assembly.

[0102] For further details, please refer to [link / reference]. Figure 3 and Figure 4 The suspension structure includes a suspension assembly 42 for suspending the pair of longitudinal protective members 1 and a support assembly 43 for suspending the pair of transverse protective members 2;

[0103] The hanging assembly 42 includes two rows of Z-shaped hanging members 421 arranged opposite to each other along the first direction. One row of Z-shaped hanging members 421 matches a set of through-hole arrays 13 provided on a longitudinal protective member 1. The row of Z-shaped hanging members 421 is suspended from the inside of the longitudinal protective member 1 on the set of through-hole arrays 13 on the longitudinal protective member 1.

[0104] The support assembly 43 includes two pairs of support plates 431 arranged opposite each other along the second direction. Each pair of support plates includes two support plates arranged opposite each other along the first direction. Each support plate forms a slot with the top plate 4. A transverse protective member 2 is inserted into a pair of slots formed by a pair of support plates and the top plate 4.

[0105] For details, please refer to Figure 3 and Figure 4 The top plate 4 is fixed with two rows of Z-shaped hanging members 421 arranged opposite each other along the first direction. In specific implementation, the number of Z-shaped hanging members 421 can be the same as or different from the number of longitudinal plate units included in the longitudinal protective member 1. For example, in one embodiment, the longitudinal protective member 1 on one side is composed of 5 longitudinal plate units, and the longitudinal protective member 1 on the opposite side is composed of 4 longitudinal plate units. Each Z-shaped hanging member 421 corresponds to one longitudinal plate unit, and the number of Z-shaped hanging members 421 is also 9.

[0106] Furthermore, each longitudinal plate unit has a through hole, and the number of through holes is the same as the number of longitudinal plate units. When the longitudinal plate units are combined to form a longitudinal plate, a through hole array 13 is formed on its longitudinal plate.

[0107] It should be noted that the positions of the through hole array 13 and the Z-type hanger 421 are corresponding. Each Z-type hanger 421 is aligned with a through hole in the second direction (aligned in the front and back direction). In other words, when the longitudinal plate moves along the second direction, the Z-type hanger 421 can pass through the through hole, thereby completing the temporary fixation of the longitudinal protective member 1 through the through hole.

[0108] Understandably, by using the through hole and the Z-shaped hanger 421, a suspension method is used to provide support when the longitudinal protective component 1 is not fixed. During the disassembly and assembly of the longitudinal protective component 1, after the fixing structure is removed, the longitudinal protective component 1 can still be held and hung on the top plate by hand. In this way, there is no need to manually lift the longitudinal protective component 1 to prevent it from falling. In addition, the Z-shaped hanger 421 can also facilitate the installation and positioning when reinstalling the longitudinal plate unit, ensuring the safety and convenience of subsequent disassembly and assembly of the longitudinal protective component 1.

[0109] For further details, please refer to [link / reference]. Figures 1 to 3 The elongated support component 43 includes two pairs of support plates 431. Specifically, a slot is formed between the support plate 431 and the top plate 4, the height of which is slightly greater than the thickness corresponding to the position of the transverse guard 2. When installing the transverse guard 2, the transverse edge at the top of the transverse guard 2 is inserted into the slot formed by the support plate and the top plate to temporarily fix the transverse guard 2.

[0110] Understandably, the horizontal protective component 2 is temporarily fixed by the slot formed by the support plate and the top plate. During the disassembly and assembly of the horizontal protective component 2, after removing the bolts used for fixing, the horizontal protective component 2 can still be hung on the top plate to prevent it from falling. There is no need for manual support of the horizontal protective component 2, which ensures the safety and convenience of subsequent disassembly and assembly of the horizontal protective component 2.

[0111] The split-type protective cover provided in this embodiment has two main advantages. First, because the protective components in the front, rear, left, and right directions of the split-type protective cover are all designed to be detachable, and the bottom plate is combined with the horizontal and vertical protective components in a pull-out structure (i.e., the bottom plate can be pulled out and inserted), the bottom plate and the split-type protective cover can be flexibly assembled and disassembled from the front, rear, left, and right directions, greatly improving the flexibility of assembly and disassembly. Second, when any target protective component is removed, the remaining three protective components can form a stable "U"-shaped structure. This structure allows the components to restrain each other. This effectively prevents the split protective cover from deforming or falling off after some protective components are removed, ensuring the stability and safety of the overall structure. Thirdly, the horizontal and vertical protective components are constructed using horizontal and vertical plates, with each horizontal and vertical plate designed to weigh less than 20kg, eliminating the need to disassemble the heavy protective cover as a whole. This is within the load-bearing capacity of manual disassembly, facilitating manual disassembly. Fourthly, by setting the vertical plates to be composed of vertical plate units, the middle vertical plate units, being of consistent size, can be interchanged during installation without special requirements on position, which is beneficial for installation and also for mass production.

[0112] Optionally, in one possible implementation, a gripping element is provided on the outer surface of the longitudinal plate, the transverse plate, and / or the bottom plate 3 away from the film clamping device.

[0113] Specifically, since a pair of longitudinal guards 1 has multiple longitudinal plate units, any number of longitudinal plate units in the longitudinal guards 1 can be disassembled individually.

[0114] It should be noted that the specific shape of the grip is set according to actual needs, and this embodiment does not limit it. For example, in one embodiment, the grip can be a handle. In another embodiment, the grip can be an exposed grip perpendicular to the horizontal and vertical plates. Yet another embodiment, the grip can be a concealed grip, etc.

[0115] Understandably, by installing grips on the longitudinal, transverse, and base plates, operators can more easily grasp and manipulate the protective cover during installation and disassembly, reducing the difficulty of operation and physical exertion.

[0116] The following two specific embodiments are provided to illustrate the detailed morphology of the linear guide component and the fixing component:

[0117] Example 2:

[0118] Optional, Figure 5 This is a diagram showing the fit between the linear guide component and the fixing component provided in Embodiment 2 of this application. Figure 6 This diagram illustrates the mating relationship between another linear guide component and a fixing component provided in Embodiment 2 of this application. Please also refer to... Figure 5 and Figure 6 Based on the embodiments, in one possible implementation, either the first linear guide component 12 or the second linear guide component 22 is any component of the guide rail slider mechanism, and the fixing component that matches the linear guide component is a mating part disposed on the base plate 3, which is another component of the guide rail slider mechanism.

[0119] It is understandable that the guide rail slider mechanism consists of a guide rail and a slider. Furthermore, the linear guide component can be a guide rail, in which case the fixed component that cooperates with the linear guide component is the slider. Alternatively, the linear guide component can also be a slider, in which case the fixed component that cooperates with the linear guide component is the guide rail.

[0120] In addition, the guide rail slider assembly can be as follows: Figure 5 The guide rail slider mechanism with a rectangular cross-section shown can also be as follows: Figure 6 The diagram shows a guide rail slider mechanism with a circular cross-section. It should be noted that this mechanism allows the slider to rotate relative to the guide rail to meet different mating angle requirements.

[0121] Furthermore, the guide rail and slider can be installed along a horizontal plane or a vertical plane; this embodiment does not limit this. When the guide rail and slider are installed along a vertical plane, a vertical guide rail mounting surface can be provided on the longitudinal plate, which is perpendicularly fixed to the base plate 3. Alternatively, a vertical guide rail mounting surface can be provided on the base plate 3, which is perpendicularly fixed to the longitudinal plate, so that the guide rail and slider mechanism is installed in a vertical plane.

[0122] For further details, please refer to [link / reference]. Figure 5 and Figure 6 The slider can be fixed on any two parallel edges of the base plate 3. When the slider slides along the guide rail, the base plate 3 also moves accordingly, completing the installation and disassembly. Alternatively, a slide rail can be fixed on any two parallel edges of the base plate 3, and the slider can be fixed on the horizontal or vertical plate. The slider can also be fixed on both the horizontal and vertical plates. When the slider slides along the guide rail, the base plate 3 also moves accordingly, completing the installation and disassembly.

[0123] In a specific implementation, for example, in one embodiment, three sliders can be installed on the side corresponding to the vertical plate and the bottom plate, corresponding to the position of each vertical plate unit; or, two sliders can be installed on the side corresponding to the horizontal plate and the horizontal plate unit.

[0124] It should be noted that the number and type of sliders are determined according to actual needs, and this embodiment does not impose any limitations on them. In specific implementation, for example, in one embodiment, 12 or 15 sliders can be installed on the long side of the base plate, and 2 sliders can be installed on the short side.

[0125] As described above, it can be understood that after the base plate 3 is installed, each of its edges is not closed and surrounded by the first linear guide assembly 12 and the second linear guide assembly 22. In other words, the base plate 3 is fixed by inserting a pair of first linear guide assemblies 12 and a pair of second linear guide assemblies 22.

[0126] The split protective cover provided in this embodiment has two aspects. First, by setting the linear guide component and the fixing component as a guide rail slider mechanism, the frictional resistance is small compared to other metal-to-metal sliding friction implementation schemes, and no metal debris is generated. Second, when the base plate is fixed in the linear guide component by the fixing component, the base plate achieves line or surface contact with the linear guide component through the fixing component. Compared to other point contact implementation schemes, the contact surface is larger. Therefore, the linear guide component has a better constraint effect on the base plate. The base plate and the linear guide components on the front, rear, left, and right sides together form a more stable overall structure, ensuring the overall stability and safety of the split protective cover.

[0127] Example 3:

[0128] Figure 7 This diagram illustrates the fit between the linear guide assembly and the fixing assembly provided in Embodiment 3 of this application. Please refer to... Figure 7 Based on Embodiment 1, either the first linear guide component 12 or the second linear guide component 22 is a groove with its opening facing the base plate, and the fixing component that matches the linear guide component is a bolt and nut assembly.

[0129] The slide groove is either a concave slide groove or a C-shaped slide groove; a through hole is provided on the lower open end of the slide groove away from the film clamping device; at least one nut in the bolt and nut assembly is disposed inside the slide groove and communicates with the through hole; the bolt in the bolt and nut assembly passes through the through hole from the outside of the slide groove and extends into the nut, thereby engaging with the nut to press the base plate against the upper open end of the slide groove near the film clamping device.

[0130] It should be noted that, based on Example 1, and referring to... Figure 7In this embodiment, the linear guide component is a slide groove, and the fixing component is a bolt and nut assembly.

[0131] Furthermore, when the base plate 3 slides in the groove, the combined action of the corresponding grooves on the left and right sides ensures that the base plate 3 will not derail (i.e., it is restricted in all four directions: up, down, left, and right).

[0132] Furthermore, when the fixing component is a bolt and nut assembly, the thickness of the base plate 3 should be set to be less than the width of the groove opening facing the clamping roller of the film clamping device, so that the base plate 3 can slide smoothly.

[0133] It is understood that the length of the groove is determined by the lengths of the longitudinal protective member 1 and the transverse protective member 2. In a specific implementation, for example, in one embodiment, the length of the groove on the transverse protective member can be equal to the length of the transverse protective member 2, and the length of the groove on the longitudinal protective member can be equal to the length of the longitudinal protective member 1.

[0134] Reference Figure 7 A through hole is provided on the open end 121 below the slide groove, through which the bolt passes. It should be noted that the shape and size of the through hole are determined according to actual needs, and are not limited in this embodiment. Specifically, for example, in one embodiment, the through hole can be configured as a threaded hole with internal threads.

[0135] Furthermore, refer to Figure 7 When the base plate 3 is fully inserted, if it is necessary to fix the base plate 3, a nut from the bolt and nut assembly can be placed above the through hole on the lower open end, so that the middle hole of the nut is connected to the through hole. At this time, the bolt in the bolt and nut assembly is rotated and tightened from bottom to top, and the base plate 3 is pushed against the upper open end of the slide groove through the bottom of the bolt, thus completing the fixing of the base plate 3.

[0136] It should be noted that the nut in the bolt and nut assembly can be a separate part or it can be directly welded to the slide to increase the firmness of the fixation. This also makes it possible to tighten the bolt with just one hand when tightening the bolt and nut assembly, which provides convenience for high-altitude operations above the factory.

[0137] Referring to the preceding description, after inserting a pair of first linear guide components 12 and a pair of second linear guide components 22 into the base plate 3, the base plate 3 can be fixed to the longitudinal guard 1 and the transverse guard 2 by bolts. Similarly, when disassembling the base plate 3, the bolts on the base plate 3 also need to be removed first.

[0138] It should be noted that, in one possible implementation, corner fasteners can be used instead of bolt and nut assemblies. Corner fasteners allow for quick fastening and disassembly, increasing the convenience and speed of loading and unloading.

[0139] The split protective cover provided in this embodiment has the following advantages: First, the linear guide assembly and the fixing assembly are configured as a sliding groove and bolt and nut assembly. Through the tightening process, the bolts firmly fix the base plate to the open end above the sliding groove. Multi-point bolt tightening ensures that the base plate fits tightly at the corresponding tightening positions, thereby achieving a firm constraint between the longitudinal plate, the transverse plate and the base plate, giving the split protective cover an integrated and stable structure similar to an integral protective cover. Second, bolt fixing can effectively disperse stress and avoid structural damage caused by local stress concentration. In other words, when subjected to external bolt clamping force, the stress will be transmitted to various parts through the bolts, thereby reducing the stress on individual components. Third, compared with permanent connection methods such as welding, bolt fixing has the characteristics of convenient assembly and disassembly. When maintenance or replacement of parts is required, the base plate can be removed simply by loosening the bolts.

[0140] Example 4:

[0141] Optional, Figure 8 This is a partial schematic diagram of the split-type protective cover provided in Embodiment 4 of this application. Please refer to... Figure 8 Based on Embodiment 3, a protective layer is provided at the end of the bolt.

[0142] Specifically, in this implementation, a protective layer is provided at the end of the bolt, so that the end of the bolt is not an exposed metal surface, but is covered by a layer of protective material.

[0143] Furthermore, the specific material of the protective layer is selected according to actual needs, and this embodiment does not limit it. In practice, the protective layer can be made of plastic, rubber, or other corrosion-resistant non-metallic materials.

[0144] It should be noted that by setting a protective layer at the end of the bolt, the amount of metal debris generated can be reduced, and the bolt end can be prevented from scratching or damaging the contact surface of the base plate 3 during use.

[0145] In addition, the protective layer can increase the friction between the bolt and the base plate 3, prevent relative slippage between the bolt and the base plate 3, and improve the stability of the fixation.

[0146] Example 5:

[0147] Furthermore, Figure 9 This is a schematic diagram of the split-type protective cover provided in Embodiment 5 of this application. Please refer to... Figure 9Based on Embodiment 3, the bolt has an extension portion 15 at its end, and the base plate 3 has a recess 32 that matches the extension portion. When the bolt presses the base plate 3 against the upper open end of the slide groove near the film clamping device, the extension portion 15 extends into the recess 32 to achieve the effect of limiting the movement by the profile and reducing or eliminating the movement caused by vibration.

[0148] Specifically, the extension portion 15 can be a protruding shape. For example, in one embodiment, the extension portion 15 can be a cylindrical, conical, or other geometric shape.

[0149] Furthermore, the base plate 3 is designed with a recess 32 that matches the shape and size of the bolt end protrusion. When the bolt is tightened and the base plate 3 is pressed against the upper open end of the slide, the protrusion 15 will extend into the recess 32, forming a tight fit.

[0150] The split-type protective cover provided in this embodiment, through the cooperation of the protruding part and the recessed part, forms a mechanical lock when the bolt is tightened, effectively preventing the base plate from shifting horizontally and ensuring the stability and reliability of the split-type protective cover. Furthermore, because the cooperation between the protruding part and the recessed part requires precise alignment of the bolts and the base plate during installation, it helps improve the installation accuracy of the split-type protective cover and ensures proper fit between the various components.

[0151] Example 6:

[0152] Optional, Figure 10 This is a schematic diagram of the split-type protective cover provided in Embodiment Six of this application. Please refer to... Figure 10 Based on Embodiment 3, the split protective cover provided in this embodiment has a protective sleeve 14 on the edge of the base plate 3, which protects the base plate 3 from the first linear guide component 12 and / or the second linear guide component 22 when the base plate 3 is in working state in contact with the upper open end, and reduces the friction between the base plate and the lower open end when the base plate 3 is in loading and unloading state in contact with the lower open end.

[0153] Specifically, the material of the sheath 14 is selected according to actual needs, and this embodiment does not limit it. In practice, the sheath 14 can be made of plastic or rubber.

[0154] Understandably, in the working state, the base plate 3 is in contact with the upper open end of the slide. At this time, by setting a protective sleeve, the base plate 3 can be protected when it is in the working state in contact with the upper open end, and the friction between the base plate 3 and the lower open end can be reduced when the base plate 3 is in the loading and unloading state in contact with the lower open end.

[0155] It should be noted that the sheath 14 is disposed around the base plate. The width of the sheath is set according to actual needs. For example, in one embodiment, the width of the sheath in its cross-section can be equal to the maximum width of the upper or lower open end of the chute that allows the base plate to move horizontally within the cross-section of the chute.

[0156] Furthermore, during the disassembly and assembly of the base plate 3, the base plate 3 falls down and contacts the lower open end of the slide groove. When removing the base plate, the base plate slides in the slide groove. By setting the protective sleeve 14, the protective sleeve directly contacts the lower open end of the slide groove, which can prevent the base plate 3 from being worn and generating metal shavings, thereby preventing contamination of the film product. At the same time, the sliding of the base plate 3 is completed by the contact between the protective sleeve 14 and the slide groove. Compared with the direct contact between the base plate 3 and the slide groove, the friction during sliding can be reduced, making the installation and disassembly of the base plate 3 more convenient.

[0157] Example 7:

[0158] Figure 11 This is a partial schematic diagram of a split-type protective cover provided in Embodiment 7 of this application. Figure 12 This is a partial schematic diagram of another split-type protective cover provided in Embodiment Seven of this application. Please refer to... Figure 11 and Figure 12 The split protective cover provided in this embodiment, based on embodiment three, has a convex member on the outer periphery of the lower surface of the base plate away from the film clamping device; the convex member is used to make the convex member of the base plate contact the lower open end when the base plate is in the loading and unloading state, so as to reduce the friction between the base plate and the lower open end during the loading of the base plate;

[0159] The convex member is a raised structure or a rolling device consisting of a mounting base and rolling elements; at least one surface of the raised structure is connected to the base plate.

[0160] For further details, please refer to Figure 12 The raised structure has at least one side connected to the base plate 3. This raised structure can be a hollow protrusion, a hollow inverted trapezoidal structure, a raised arc-shaped strip, or a side-mounted hook-like structure, etc., and is not limited to any particular type in this embodiment. Furthermore, the raised structure can also be located at the open end below the slide groove.

[0161] Please refer to Figure 11 The convex part 33 can be a rolling device consisting of a mounting base and a rolling element. The rolling element can be a sphere that can rotate freely in 360 degrees. The mounting base is used to support the rolling element and fix the convex part to the base plate. When the base plate 3 is inserted or pulled out, the rolling element contacts the lower open end of the slide groove, thereby realizing the movement of the base plate.

[0162] It is understandable that the loading and unloading process of the base plate 3 can be changed from sliding friction to rolling friction by using convex parts, which reduces the coefficient of friction and increases loading and unloading efficiency.

[0163] The split protective cover provided in this embodiment reduces the contact area by having a convex part contact the first linear guide assembly or the second direct guide assembly, which can effectively prevent the base plate from being worn and improve the convenience of installing and disassembling the base plate.

[0164] Corresponding to the aforementioned embodiment of a split protective cover, this application also provides an embodiment of a film stretching device.

[0165] Example 8:

[0166] Figure 13 This is a schematic diagram of the film stretching apparatus provided in Embodiment 8 of this application. Please refer to... Figure 13 The film stretching equipment includes a film clamping device 5 and a split protective cover as described in any of the first aspects of this application; wherein...

[0167] The top plate of the split protective cover is installed on the beam-encased steel 8 under the crossbeam 7 above the factory building; the beam-encased steel 8 is a steel structure that surrounds at least two sides of the crossbeam 7 and is anchored to the crossbeam 7.

[0168] The film clamping device 5 is inverted on the top plate so that it is covered by the split protective cover; wherein, the film clamping device 5 is used to guide the film that passes through the gap on the crossbeam 7 and the feed port on the top plate into the film clamping device 5, to the discharge port on the bottom plate of the split protective cover, and out through the discharge port.

[0169] Optional, please continue to refer to Figure 13 In one possible implementation, the film stretching device may further include a hopper 6, one end of which is supported on the base plate of the split protective cover.

[0170] Specifically, the film clamping device is used to guide the film to the recycling device. In practice, there is a gap in the middle of the crossbeam 7, and the film enters the film clamping device 5 through the gap in the crossbeam 7.

[0171] Furthermore, the separate protective cover outside the membrane clamping device 5 can prevent people from touching the moving parts, thus preventing accidents such as entanglement and pinching.

[0172] Furthermore, a beam-encased steel structure is a steel structure that surrounds at least two sides of a crossbeam and is anchored to the crossbeam.

[0173] Understandably, the top plate of the split protective cover is installed on the steel beam under the crossbeam, and the membrane clamping device is installed on the top plate.

[0174] The film stretching equipment provided in this embodiment effectively utilizes the vertical space of the factory building by inverting the film clamping device onto the steel beam under the crossbeam above the factory building, avoiding the occupation of valuable floor space and thus improving the space utilization rate of the entire production line. Meanwhile, one end of the hopper is connected to the film shredder, while the other end is supported on the base plate of the split protective cover, which enhances the stability of the hopper and makes the entire film stretching equipment more structurally integrated.

[0175] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A split-type protective cover, characterized in that, The split-type protective cover is used to cover the inverted membrane clamping device; the split-type protective cover includes a pair of longitudinal protective members, a pair of transverse protective members, a bottom plate, and a top plate; wherein... The pair of longitudinal protective members are arranged opposite each other in a first direction extending along the clamping roller of the film clamping device; each of the longitudinal protective members includes a longitudinal plate and a first linear guide assembly disposed at the bottom end of the longitudinal plate; The pair of transverse protective members are arranged opposite each other along a second direction perpendicular to the first direction and are disposed at both ends of the pair of longitudinal protective members; each of the transverse protective members includes a horizontal plate and a second linear guide assembly disposed at the bottom end of the horizontal plate. The base plate has a discharge port, and the base plate is arranged along the bottom surface surrounded by the pair of longitudinal protective members and the pair of transverse protective members; the base plate can insert either of the pair of first linear guide components and the pair of second linear guide components into a target linear guide component, and move along the pair of target linear guide components to the installation position, and be fixed to the pair of longitudinal protective members by a first fixing component that matches the pair of first linear guide components, and fixed to the pair of transverse protective members by a second fixing component that matches the pair of second linear guide components, thereby together with the pair of longitudinal protective members and the pair of transverse protective members to surround the film clamping device; A feed inlet is formed on the top plate; the top plate is also provided with a fixing structure and a hanging structure. The fixing structure is used to fix the pair of longitudinal protective members and the pair of transverse protective members to the top plate when in the working state, and the hanging structure is used to hang the pair of longitudinal protective members and the pair of transverse protective members to the top plate when in the loading and unloading state. Among them, any one of the pair of longitudinal protective members and the pair of transverse protective members can be disassembled in a direction away from the base plate when the base plate is in the installation state, and after the target protective member is removed, the base plate and the remaining three protective members other than the target protective member can prevent the split protective cover from deforming or falling off through mutual restraint.

2. The split-type protective cover according to claim 1, characterized in that, The suspension structure includes a suspension assembly for suspending the pair of longitudinal protective members and a support assembly for suspending the pair of transverse protective members; The hanging assembly includes two rows of Z-shaped hanging members arranged opposite each other along the first direction. Each longitudinal protective member is provided with a set of through holes that match a row of Z-shaped hanging members. A row of Z-shaped hanging members is suspended from the inside of a longitudinal protective member on a set of through holes on the longitudinal protective member. The support assembly includes two pairs of support plates arranged opposite each other along the second direction. Each pair of support plates includes two support plates arranged opposite each other along the first direction. Each support plate forms a slot with the top plate. A transverse protective member is inserted into a pair of slots formed by a pair of support plates and the top plate.

3. The split-type protective cover according to claim 1, characterized in that, Either the first linear guide component or the second linear guide component is any component of the guide rail slider mechanism, and the fixing component that matches the linear guide component is a mating part disposed on the base plate, which is another component of the guide rail slider mechanism.

4. The split-type protective cover according to claim 1, characterized in that, Either the first linear guide assembly or the second linear guide assembly is a groove with its opening facing the base plate, and the fixing assembly that matches the linear guide assembly is a bolt and nut assembly; The slide groove is either a concave slide groove or a C-shaped slide groove; a through hole is provided on the lower open end of the slide groove away from the film clamping device; at least one nut in the bolt and nut assembly is disposed inside the slide groove and communicates with the through hole; the bolt in the bolt and nut assembly passes through the through hole from the outside of the slide groove and extends into the nut, thereby engaging with the nut to press the base plate against the upper open end of the slide groove near the film clamping device.

5. The split-type protective cover according to claim 4, characterized in that, The edge of the base plate is provided with a protective sleeve to protect the base plate from the first linear guide assembly and / or the second linear guide assembly when the base plate is in the working state in contact with the upper open end, and to reduce the friction between the base plate and the lower open end when the base plate is in the loading and unloading state in contact with the lower open end.

6. The split-type protective cover according to claim 4, characterized in that, The base plate has a protruding part on its outer periphery away from the lower surface of the film clamping device; the protruding part is used to make the base plate contact the lower open end when the base plate is in the loading and unloading state, so as to reduce the friction between the base plate and the lower open end during the loading process. The convex member is a raised structure or a rolling device consisting of a mounting base and rolling elements; at least one surface of the raised structure is connected to the base plate.

7. The split-type protective cover according to claim 4, characterized in that, The bolt has a protective layer at its end; or, The bolt has an insertion portion at its end, and the base plate has a recessed portion that matches the insertion portion. When the bolt presses the base plate against the upper open end of the slide groove near the film clamping device, the insertion portion extends into the recessed portion to achieve the effect of limiting and preventing movement.

8. The split-type protective cover according to claim 1, characterized in that, Each of the aforementioned horizontal panels is provided with an observation window; And / or, Each of the horizontal plates and each of the vertical plates is provided with reinforcing ribs.

9. The split-type protective cover according to claim 1, characterized in that, The longitudinal plate, the transverse plate, and / or the bottom plate are provided with gripping elements on their outer surfaces away from the film clamping device; And / or, The longitudinal plate is composed of multiple longitudinal plate units spliced ​​and arranged along a first direction.

10. A film stretching apparatus, characterized in that, The film stretching equipment includes a film clamping device and a split protective cover as described in any one of claims 1-9; wherein... The top plate of the split protective cover is installed on the beam-encased steel structure under the crossbeam above the factory building; the beam-encased steel structure is a steel structure that surrounds at least two sides of the crossbeam and is anchored to the crossbeam. The film clamping device is inverted on the top plate so that it is covered by the split protective cover; wherein, the film clamping device is used to guide the film that enters the film clamping device from above the crossbeam through the gap on the crossbeam and the feed port on the top plate to the discharge port on the bottom plate of the split protective cover, and then exits through the discharge port.

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