An automatic cutting and film covering device for shield segments with super-large diameter and a film covering method

Abstract

The present invention provides an automatic cutting and film covering device for shield segments with an ultra-large diameter and a film covering method, which relates to the technical field of automatic production lines for shield segments and solves the technical problems of manual cutting and film covering, such as poor accuracy, low efficiency, and high labor demand. The automatic cutting and film covering device includes a frame, a material storage component, a tensioning component, a film cutting component, a film pressing component, and a film holding component. The material storage component is movably arranged on the frame; the tensioning component is arranged between the material storage component and the film cutting component; the film cutting component is arranged on the frame; the film pressing component is arranged below the film cutting component; the film holding component is movably arranged on the frame and can move up and down relative to the frame. The present invention is used for the film conveying, cutting, and covering actions of shield segments with an ultra-large diameter, and has the advantages of convenient operation, high automatic cutting efficiency, high accuracy, and low labor demand.

Description

Technical Field

[0001] The present invention relates to the technical field of shield segment automatic production lines, and particularly to an automatic cutting and film covering device and a film covering method for extra-large diameter shield segments. Background Art

[0002] At present, most domestic shield segment productions adopt the method of fixed formwork tables, with relatively low production efficiency and relatively low utilization rate of the formwork. The use of shield segment automatic production lines can well solve the above problems. However, the use of automatic production lines has relatively high rigid requirements for formwork and equipment. Any problem in any link will lead to the stagnation of the entire production line, thus affecting production efficiency.

[0003] Plastic film refers to a film made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, which is used for packaging and as a film covering layer. The films used in the shield segment production industry are mostly cut manually and covered manually. For segments with large diameter and width, at least four people are required to complete the covering operation. In the prior art, workers use a ruler or tape measure to measure the length of the film and cut it manually. The manual labor demand is large, the production beat is slow, and it cannot meet the requirements of assembly line production. Moreover, the film needs to occupy the space outside the assembly line. The precision of the cut film is low, the cutting is inconvenient, which easily leads to uneven edges of the film, extremely easy to cause unqualified length, the film is stretched and deformed, affecting the use, and wasting a lot of materials, thus affecting the production quality of shield segments. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic cutting and film covering device and a film covering method for extra-large diameter shield segments, so as to solve the technical problems of poor precision, low efficiency and large manual labor demand existing in manual cutting and film covering in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An automatic cutting and film covering device for extra-large diameter shield segments provided by the present invention includes a frame, a material storage assembly, a tensioning assembly, a film cutting assembly, a film pressing assembly and a film holding assembly. The frame straddles the traveling track of the segment formwork vehicle. The material storage assembly is movably arranged on the frame for placing and providing the film to be cut. The tensioning assembly is arranged between the material storage assembly and the film cutting assembly and can guide and tension the film. The film cutting assembly is arranged on the frame and can cut the passing film. The film pressing assembly is arranged below the film cutting assembly to press the film to be cut. The film holding assembly is movably arranged on the frame and can move up and down relative to the frame to send the tail section of the cut film to the tail of the segment on the segment formwork vehicle for film covering.

[0007] As a further improvement of the present invention, the material storage assembly includes a material storage roller, a first motor, a first transmission assembly, and an open bearing seat. The material storage roller is rotatably arranged on the top of the frame through the open bearing seat, and the first motor is in transmission connection with the material storage roller through the first transmission assembly.

[0008] As a further improvement of the present invention, a plug block for limiting the positions of both ends of the film is also movably arranged on the material storage roller.

[0009] As a further improvement of the present invention, the material storage roller is a common roller or an air shaft.

[0010] As a further improvement of the present invention, the tensioning assembly includes a bearing seat and a guiding roller. The guiding roller is rotatably arranged on the frame through the bearing seat, and the guiding roller is flush with the material storage roller in the height direction or is located below the material storage roller.

[0011] As a further improvement of the present invention, the film cutting assembly includes a fixed frame, a second motor, a second transmission assembly, a tool holder, a tool, a first slider, a first slide rail, and a first travel switch. The fixed frame is of an L-shaped structure and is fixed on the frame. The first slide rail is fixed on the open side of the fixed frame facing the tensioning assembly and has a gap with the fixed frame. The second motor is fixed in the inner cavity of the fixed frame. The first slider is slidably arranged on the first slide rail and is fixedly connected with the second transmission assembly. The second motor is in transmission connection with the second transmission assembly. The tool is fixed to the bottom of the first slider through the tool holder and protrudes from the bottom opening of the fixed frame. The first travel switch is arranged at both ends of the fixed frame to limit the left and right sliding limit positions of the first slider.

[0012] As a further improvement of the present invention, the film pressing assembly includes a pressing upper plate and a pressing lower plate arranged one above the other. The pressing upper plate is fixed at the opening below the fixed frame, and a through slot is provided corresponding to the position of the tool for the tool to pass through. The pressing lower plate is movably arranged on the frame through the film holding assembly and can move up and down relative to the frame to press the film or release the film. A cutting groove is provided on the pressing lower plate corresponding to the position of the tool. When the pressing upper plate and the pressing lower plate are attached together to press the film, the end of the tool is located in the cutting groove, and there is a gap between the end of the tool and the bottom of the cutting groove.

[0013] As a further improvement of the present invention, the film holding assembly includes a third motor, a third transmission assembly, a second slider, a second slide rail, a second travel switch, a vacuum suction pump, and a film suction hole. The third motor is fixed on the frame, and both ends of the clamping lower plate are respectively fixedly connected to the second slider, one end of the second slider is connected to the third transmission assembly, and the other end is slidably penetrated on the second slide rail through a connecting rod. The second slide rail is tilted on the frame, and the third motor is transmission-connected to the third transmission assembly; the second travel switches are arranged on the frame one above and one below to limit the upper and lower sliding limit positions of the second slider; the interior of the clamping lower plate is a hollow structure with an air suction cavity, and the film suction hole array is arranged on the upper surface of the clamping lower plate, all of the film suction holes are connected to the air suction cavity, and the vacuum suction pump is connected to the air suction cavity through a pipeline to provide negative pressure suction to the air suction cavity.

[0014] As a further improvement of the present invention, the first motor is a variable frequency speed regulating motor; the second motor and the third motor are both forward and reverse motors.

[0015] As a further improvement of the present invention, the frame is a portal steel structure assembly, and the space below is convenient for the segment mold vehicle to pass through, providing an installation foundation for other equipment.

[0016] The present invention provides a coating method, which uses the automatic coating device to coat the super-large diameter shield segment, and specifically comprises the following steps:

[0017] Step 10, manually controlling the first motor in the material storage assembly to start, stretching the beginning of the film placed in the material storage assembly to a specified position, and controlling the first motor to shut down;

[0018] Step 20, manually control the third motor in the film holding assembly to start, so that the film holding assembly moves upward, and the pressing lower plate on the film holding assembly follows the upward movement and fits with the pressing upper plate in the film pressing assembly to achieve film pressing;

[0019] Step 30, when the second slider in the film holding assembly approaches or contacts the second travel switch located at the upper portion, the third motor in the film holding assembly stops, and the second motor in the film cutting assembly starts to perform the film cutting action;

[0020] Step 40, when the first slider in the film cutting assembly approaches or contacts the first travel switch at one end, the second motor in the film cutting assembly stops, and the vacuum suction pump in the film holding assembly starts to complete the film adsorption action;

[0021] Step 50, manually control the third motor in the film holding assembly to start, the film holding assembly moves downward, and drives the tail end of the cut film to move downward together;

[0022] Step 60: When the second slider in the film holding assembly approaches or contacts the second travel switch located at the lower part, the third motor in the film holding assembly stops, and the vacuum suction pump stops, completing the film covering operation; repeat the above steps.

[0023] The start and stop of the first motor in the material storage assembly and the start of the third motor in the film holding assembly are completed by the handheld control device.

[0024] The present invention has the following beneficial effects compared with the prior art:

[0025] The automatic film cutting and covering equipment for extra-large diameter shield segments provided by the present invention can complete film conveying, cutting, and covering operations, adopting an automatic (or semi-automatic) control method, which is easy to operate, has high automatic cutting efficiency, high precision, and requires few workers; the automatic film cutting and covering equipment of the present invention is arranged above the segment production line and is connected to the segment production line control system, and the equipment and the production line coordinate to further improve the production efficiency of the production line. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0027] Figure 1 is a three-dimensional structural schematic diagram of the automatic film cutting and covering equipment for extra-large diameter shield segments of the present invention as seen from the right front side;

[0028] Figure 2 is a three-dimensional structural schematic diagram of the automatic film cutting and covering equipment for extra-large diameter shield segments of the present invention as seen from the left rear side;

[0029] Figure 3 is a three-dimensional structural schematic diagram of the automatic film cutting and covering equipment for extra-large diameter shield segments of the present invention as seen from the right rear side;

[0030] Figure 4 is Figure 3 the partial enlarged view of A in

[0031] Figure 5 is a three-dimensional structural schematic diagram of the automatic film cutting and covering equipment for extra-large diameter shield segments of the present invention when the film cutting assembly removes a side plate from the fixed frame;

[0032] Figure 6 is Figure 5 the partial enlarged view of B in

[0033] Figure 7It is a schematic structural diagram when the first slider and the tool holder are together in the automatic cutting and film covering equipment for super-large diameter shield segment of the present invention;

[0034] Figure 8 It is a partial schematic diagram of the pressing lower plate in the automatic cutting and film covering equipment for super-large diameter shield segment of the present invention;

[0035] Figure 9 It is a partial schematic diagram of the pressing upper plate in the automatic cutting and film covering equipment for super-large diameter shield segment of the present invention.

[0036] In the figure, 1 is the frame; 2 is the material storage assembly, 21 is the material storage roller, 22 is the first motor, 23 is the first transmission assembly, 24 is the open bearing seat, 25 is the top plug block; 3 is the tensioning assembly, 31 is the bearing seat, 32 is the guiding roller; 4 is the film cutting assembly, 41 is the fixed frame, 42 is the second motor, 43 is the second transmission assembly, 44 is the tool holder, 45 is the cutting tool, 46 is the first slider, 47 is the first slide rail, 48 is the first travel switch; 5 is the film pressing assembly, 51 is the pressing upper plate, 511 is the slotted groove, 52 is the pressing lower plate, 521 is the cutting groove; 6 is the film holding assembly, 61 is the third motor, 62 is the third transmission assembly, 63 is the second slider, 64 is the second slide rail, 65 is the second travel switch, 66 is the vacuum suction pump, 67 is the film suction hole, 68 is the connecting rod member. Detailed implementation manners

[0037] To make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope protected by the present invention.

[0038] As Figure 1 shown, the present invention provides an automatic cutting and film covering equipment for super-large diameter shield segment, including a frame 1, a material storage assembly 2, a tensioning assembly 3, a film cutting assembly 4, a film pressing assembly 5 and a film holding assembly 6. The frame 1 straddles the traveling track of the segment mold car. The material storage assembly 2 is movably arranged on the frame 1 for placing and providing the film to be cut. The tensioning assembly 3 is arranged between the material storage assembly 2 and the film cutting assembly 4 to guide and tension the film. The film cutting assembly 4 is arranged on the frame 1 to cut the passing film. The film pressing assembly 5 is arranged below the film cutting assembly 4 to press the film to be cut. The film holding assembly 6 is movably arranged on the frame 1 and can move up and down relative to the frame 1 to send the tail section of the cut film to the tail of the segment on the segment mold car for film covering.

[0039] The control system of the pipe segment production line controls the pipe segment mold vehicle to stop at a specified position. The specified position must meet the following requirements: after the pipe segment vehicle stops, the head end of the pipe segment on it passes through the frame 1 and is located at the front side of the frame 1, and the tail end of the pipe segment is located inside the frame 1. The distance between the tail end of the pipe segment and the front end of the frame 1 must ensure that the film moves from the film cutting component 4 to the bottom of the frame 1 to cover the tail end of the pipe segment. That is, when the film holding component 6 moves down with the cut tail end of the film, the tail end of the film is just located at the tail end of the pipe segment after moving to the bottom, so that the pipe segment is fully and completely covered with film;

[0040] The automatic film cutting and covering equipment for super-large diameter shield segments provided by the present invention can complete the actions of film conveying, cutting and covering, and adopts automatic (or semi-automatic) control mode, which is easy to operate, has the characteristics of high automatic cutting efficiency, high precision and low labor requirements; the automatic film cutting and covering equipment of the present invention is arranged above the segment production line and is connected to the control system of the segment production line. The equipment and the assembly line coordinate actions to further improve the production efficiency of the assembly line.

[0041] like Figure 1 and Figure 2 As shown, as an optional embodiment of the present invention, the storage assembly 2 includes a storage roller 21, a first motor 22, a first transmission assembly 23, and an open bearing seat 24. The storage roller 21 is rotatably set on the top of the frame 1 through the open bearing seat 24. The open bearing seat 24 facilitates the installation and disassembly of the storage roller 21. The first motor 22 is connected to the storage roller 21 through the first transmission assembly 23.

[0042] Further, the first transmission assembly 23 includes a first pulley arranged on the output shaft of the first motor 22, a second pulley arranged on the storage roller 21, and a belt sleeved on the first pulley and the second pulley. The storage roller 21 can be an inflatable shaft, of course, it can also be a common roller.

[0043] The first motor 22 is a variable frequency adjustable speed motor, and the braking is achieved by an electromagnetic brake. The specific first motor 22 and the electromagnetic brake are both implemented by products in the prior art. The start of the first motor 22 can be controlled by a handheld operating device, and the electromagnetic brake can be controlled to complete the braking action of the first motor 22.

[0044] In order to further limit the positions of the two ends of the film and to be applicable to films of different widths, a top plug 25 for limiting the positions of the two ends of the film is movably provided on the storage roller 21 .

[0045] The top plug block 25 is a circular ring structure and is sleeved on the material storage roller 21 .

[0046] As an optional embodiment of the present invention, the tensioning assembly 3 includes a bearing seat 31 and a guide roller 32. The guide roller 32 is rotatably set on the frame 1 through the bearing seat 31. The guide roller 32 is flush with the storage roller 21 in the height direction or is located below the storage roller 21.

[0047] When in use, the storage roller 21 rotates clockwise driven by the first motor 22 , and the film extends from the bottom of the storage roller 21 , is then placed on the top of the guide roller 32 , and is then pulled into the position of the film pressing assembly 5 .

[0048] like Figure 3 , Figure 6 and Figure 7 As shown, as an optional embodiment of the present invention, the film cutting assembly 4 includes a fixed frame 41, a second motor 42, a second transmission assembly 43, a knife seat 44, a knife 45, a first slider 46, a first slide rail 47 and a first travel switch 48. The fixed frame 41 is an inverted U-shaped structure, with both ends fixed to the frame 1 and the opening facing downward; the first slide rail 47 is fixed to the side of the fixed frame 41 facing the tensioning assembly 3, and a gap is left between the fixed frame 41, and the gap is used to accommodate the first slider 46, so that the first slider 46 can move horizontally left and right in this space; the second The motor 42 is fixed in the inner cavity of the fixed frame 41, and the second transmission assembly 43 is also arranged in the inner cavity of the fixed frame 41. Specifically, the second transmission assembly 43 includes a first sprocket, a second sprocket, and a first chain; the first sprocket is arranged on the output shaft of the second motor 42, and the second sprocket is fixed in the fixed frame 41 through a bearing. The first chain is sleeved on the first sprocket and the second sprocket. The first slider 46 is slidably arranged on the first slide rail 47 and is reliably connected to the first chain in the second transmission assembly 43. Since the first slider 46 is fixedly connected to the first chain, When the second motor 42 is running, the first slider 46 can be driven to move together during the movement of the first chain, and the first slider 46 is slidably arranged on the first slider 47 by setting the first slide rail 47, which can not only ensure the movement stability of the first slider 46, avoid the flipping of the first slider 46 when moving, and ensure that the tool 45 located on the first slider 46 moves along a predetermined direction to complete the film cutting action, but also play a guiding and limiting role in the movement of the first slider 46; the second motor 42 is connected to the second transmission assembly 43 in transmission, and the tool 45 is fixed to the bottom of the first slider 46 through the tool holder 44 and protrudes from the bottom opening of the fixed frame 41; the first travel switch 48 is arranged at both ends of the fixed frame 41 to limit the left and right sliding limit positions of the first slider 46. Of course, in order to achieve sliding limit, the setting position of the first travel switch 48 needs to be determined according to the actual structure and specifications, as long as it can ensure that it can play a limiting role. Specifically, the type of the first travel switch 48 can be a proximity switch or a touch limit switch after contact, and the specific form is not specifically limited here.

[0049] The second motor 42 is a forward and reverse motor.

[0050] As Figure 4 and Figure 5 shown, as an alternative embodiment of the present invention, the film pressing assembly 5 includes a pressing upper plate 51 and a pressing lower plate 52 arranged one above the other. The pressing upper plate 51 is fixed at the opening below the fixed frame 41, and a through slot 511 is provided corresponding to the position of the cutter 45 for the cutter 45 to pass through. The pressing lower plate 52 is movably arranged on the frame 1 through the film holding assembly 6 and can move up and down relative to the frame 1 to press or release the film. A cutting groove 521 is provided on the pressing lower plate 52 corresponding to the position of the cutter 45. When the pressing upper plate 51 and the pressing lower plate 52 are attached together to press the film, the end of the cutter 45 is located in the cutting groove 521, and there is a gap between the end of the cutter 45 and the bottom of the cutting groove 521. By setting the cutting groove 521 with sufficient depth, it is ensured that there is no interference when the cutter 45 travels and works.

[0051] As Figure 8 and Figure 9 shown, further, the pressing upper plate 51 and the pressing lower plate 52 have the same specifications, and the slot 511 and the cutting groove 521 are arranged opposite to each other and are located at the rear side positions of the pressing upper plate 51 and the pressing lower plate 52, that is, on the side close to the tensioning assembly 3. With this structural arrangement, a large width can be left between the pressing upper plate 51 and the pressing lower plate 52 after the film is cut, ensuring stable film pressing.

[0052] As an alternative embodiment of the present invention, the film holding assembly 6 includes a third motor 61, a third transmission assembly 62, a second slider 63, a second slide rail 64, a second travel switch 65, a vacuum suction pump 66, and suction film holes 67. The third motor 61 is fixed on the frame 1. Both ends of the pressing lower plate 52 are fixedly connected to the second slider 63. One end of the second slider 63 is connected to the third transmission assembly 62, and the other end is slidably inserted through the second slide rail 64 via a connecting rod member 68. The second slide rail 64 is arranged along the height direction of the frame 1 and is inclined at an angle to the vertical direction on the frame 1. Further, upper and lower cross beams are provided on the frame 1. The second slide rail 64 is a rod-shaped structure, and both ends are connected to the upper and lower cross beams. The third motor 61 is in transmission connection with the third transmission assembly 62. Here, it should be noted that the third transmission assembly 62 includes a third sprocket, a fourth sprocket, and a second chain. The third sprocket is fixed on the output shaft of the third motor 61. The fourth sprocket is fixed on the lower cross beam of the frame 1 through a bearing. The second chain is adjusted on the third sprocket and the fourth sprocket. And the third transmission assemblies 62 are respectively located on both sides of the pressing lower plate 52. The two third sprockets are connected by a synchronous shaft to achieve synchronous movement on both sides. One of the third sprockets is connected to the third motor 61. The second slider 63 is sleeved on both ends of the pressing lower plate 52 and is fixedly connected to the second chain. One end of the connecting rod member 68 is connected to the second slider 63, and the other end has a collar and is sleeved on the outside of the second slide rail 64. The second travel switches 65 are arranged one above the other on the frame 1 to limit the upper and lower sliding limit positions of the second slider 63. It is not specifically limited here whether the second travel switch 65 specifically uses a proximity type or a contact type. Either type can be used, just to limit the lifting position of the pressing lower plate 52. The pressing lower plate 52 has a hollow structure inside and has a suction cavity. The suction film holes 67 are arranged in an array on the upper surface of the pressing lower plate 52. All the suction film holes 67 communicate with the suction cavity. The vacuum suction pump 66 is connected to the suction cavity through a pipeline. Air is extracted by the vacuum suction pump 66 to generate an atmospheric pressure difference, so as to provide a negative pressure suction force in the suction cavity, thereby ensuring that the film is firmly adsorbed on the surface of the pressing lower plate 52.

[0053] The third motor 61 is a forward and reverse motor.

[0054] Further, the frame 1 is a gantry steel structure assembly, and the space below is convenient for the segment mold vehicle to pass through, providing an installation foundation for other equipment.

[0055] A film covering method provided by the present invention uses an automatic cutting and film covering device to cover an extra-large diameter shield segment, and specifically includes the following steps:

[0056] Step 10: Manually control the first motor in the material storage component to start, stretch the starting end of the film placed in the material storage component to a specified position, and then control the first motor to stop. Specifically, the specified position here refers to the starting end position of the segment on the segment mold vehicle below the frame 1.

[0057] Step 20: Manually control the third motor in the film holding component to start, make the film holding component move upward, and the pressing lower plate on the film holding component follows upward and fits with the pressing upper plate in the film pressing component to achieve film pressing.

[0058] Step 30: When the second slider in the film holding component approaches or contacts the second travel switch located in the upper part, the third motor in the film holding component stops, and the second motor in the film cutting component starts to perform the film cutting action.

[0059] Step 40: When the first slider in the film cutting component approaches or contacts the first travel switch located at one end, the second motor in the film cutting component stops, and the vacuum suction pump in the film holding component starts to complete the film adsorption action.

[0060] Step 50: Manually control the third motor in the film holding component to start, the film holding component moves downward, and drives the tail end of the cut film to move downward together.

[0061] Step 60: When the second slider in the film holding component approaches or contacts the second travel switch located in the lower part, the third motor in the film holding component stops, and the vacuum suction pump stops to complete the film covering action. Repeat the above steps.

[0062] The start and stop of the first motor in the material storage component and the start of the third motor in the film holding component are completed by a handheld control device.

[0063] First of all, it should be noted here that "inward" is the direction towards the center of the accommodation space, and "outward" is the direction away from the center of the accommodation space.

[0064] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the Figure 1 orientation or positional relationship shown, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0065] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0066] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0068] In the description of this specification, descriptions with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0069] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

[0070] The depth of the groove of the pressing lower plate should meet the requirement that the working stroke of the tool does not interfere with it.

Claims

1. An automatic cutting and film laminating equipment for super-large diameter shield segments, characterized in that, It includes a frame, a material storage assembly, a tensioning assembly, a film cutting assembly, a film pressing assembly and a film holding assembly. The frame straddles the traveling track of the segment mold car. The material storage assembly is movably arranged on the frame for placing and providing the film to be cut. The tensioning assembly is arranged between the material storage assembly and the film cutting assembly and can guide and tension the film. The film cutting assembly is arranged on the frame and can cut the passing film. The film pressing assembly is arranged below the film cutting assembly to press the film to be cut. The film holding assembly is movably arranged on the frame and can move up and down relative to the frame to send the tail section of the cut film to the tail of the segment on the segment mold car for film covering. The film holding assembly includes a third motor, a third transmission assembly, a second slider, a second slide rail, a second travel switch, a vacuum suction pump and a film suction hole. The third motor is fixed on the frame. Both ends of the pressing lower plate are respectively fixedly connected with the second slider. One end of the second slider is connected with the third transmission assembly, and the other end is slidably penetrated through the second slide rail through a connecting rod. The second slide rail is obliquely arranged on the frame. The third motor is in transmission connection with the third transmission assembly. The second travel switch is arranged on the frame in an upper and a lower manner to limit the upper and lower sliding limit positions of the second slider. The inside of the pressing lower plate is a hollow structure with a suction cavity. The film suction holes are arranged in an array on the upper surface of the pressing lower plate. All the film suction holes are communicated with the suction cavity. The vacuum suction pump is connected with the suction cavity through a pipeline to provide negative pressure suction to the suction cavity.

2. The automatic cutting and film laminating equipment for super-large diameter shield segments according to claim 1, characterized in that, The material storage assembly includes a material storage roller, a first motor, a first transmission assembly and an open bearing seat. The material storage roller is rotatably arranged on the top of the frame through the open bearing seat. The first motor is in transmission connection with the material storage roller through the first transmission assembly.

3. The automatic cutting, covering and laminating equipment for extra-large diameter shield segments according to claim 2, wherein, A plug block for limiting the positions of both ends of the film is also movably arranged on the material storage roller.

4. The automatic cutting and film laminating equipment for super-large diameter shield segments according to claim 2, characterized in that, The material storage roller is a common roller or an air shaft.

5. The automatic cutting and film laminating equipment for super-large diameter shield segments according to claim 2, characterized in that, The tensioning assembly includes a bearing seat and a guide roller. The guide roller is rotatably arranged on the frame through the bearing seat. The guide roller is flush with the material storage roller in the height direction or is located below the material storage roller.

6. The automatic cutting and film covering equipment for super-large diameter shield segments according to claim 2, characterized in that, The film cutting assembly includes a fixed frame, a second motor, a second transmission assembly, a tool holder, a tool, a first slider, a first slide rail and a first travel switch. The fixed frame is of an inverted U-shaped structure and is fixed on the frame with the opening facing downwards. The first slide rail is fixed on the side of the fixed frame facing the tensioning assembly and there is a gap between the first slide rail and the fixed frame. The second motor is fixed in the inner cavity of the fixed frame. The first slider is slidably arranged on the first slide rail and is fixedly connected with the second transmission assembly. The second motor is in transmission connection with the second transmission assembly. The tool is fixed at the bottom of the first slider through the tool holder and protrudes from the bottom opening of the fixed frame. The first travel switch is arranged at both ends of the fixed frame to limit the left and right sliding limit positions of the first slider.

7. The automatic cutting and film covering equipment for super-large diameter shield segments according to claim 6, characterized in that, The film pressing assembly includes a pressing upper plate and a pressing lower plate which are arranged one above the other. The pressing upper plate is fixed at the opening below the fixed frame, and a through slot is provided corresponding to the position of the cutter for the cutter to pass through. The pressing lower plate is movably arranged on the frame through the film holding assembly and can move up and down relative to the frame to press or release the film. A cutting groove is provided on the pressing lower plate corresponding to the position of the cutter. When the pressing upper plate and the pressing lower plate are attached together to press the film, the end of the cutter is located in the cutting groove, and there is a gap between the end of the cutter and the bottom of the cutting groove.

8. The automatic cutting, laminating and film covering equipment for super-large diameter shield segments according to claim 7, characterized in that The first motor is a variable-frequency speed-regulating motor; the second motor and the third motor are both forward and reverse motors.

9. A film laminating method, characterized in that, Using the automatic film cutting and laminating equipment as described in any one of claims 2-8 to laminate the super-large diameter shield segment, specifically including the following steps: Step 10: Manually control the first motor in the material storage assembly to start, stretch the starting end of the film placed in the material storage assembly and stretch it to the specified position, and then control the first motor to stop. Step 20: Manually control the third motor in the film holding assembly to start, make the film holding assembly move upward, and the pressing lower plate on the film holding assembly follows and moves upward and fits with the pressing upper plate in the film pressing assembly to achieve film pressing. Step 30: When the second slider in the film holding assembly approaches or contacts the second travel switch located in the upper part, the third motor in the film holding assembly stops, and the second motor in the film cutting assembly starts to perform the film cutting action. Step 40: When the first slider in the film cutting assembly approaches or contacts the first travel switch located at one end, the second motor in the film cutting assembly stops, and the vacuum suction pump in the film holding assembly starts to complete the film adsorption action. Step 50: Manually control the third motor in the film holding assembly to start, the film holding assembly moves downward, and drives the trailing end of the cut film to move downward together. Step 60: When the second slider in the film holding assembly approaches or contacts the second travel switch located in the lower part, the third motor in the film holding assembly stops, and the vacuum suction pump stops to complete the film covering action; repeat the above steps. The start and stop of the first motor in the material storage assembly and the start of the third motor in the film holding assembly are completed by a handheld control device.

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