Film clamping mechanism of gypsum board wrapping film packaging machine

Abstract

The invention belongs to the technical field of plasterboard processing, and discloses a film clamping mechanism of a plasterboard wrapping film packaging machine, which comprises cylindrical clamping blocks arranged below a conveying chain plate, and clamping intervals are arranged between the adjacent cylindrical clamping blocks; a plurality of top film plates are arranged below the cylindrical clamping block; the lifting power device is arranged below the film jacking plates and is connected with each film jacking plate; the lifting power device drives the film ejecting plate to ascend, and the film ejecting plate ejects the winding film into the corresponding clamping space; according to the winding film feeding device, the film jacking plates are driven by the lifting power device to synchronously ascend, the winding film is actively pushed and forcibly fed into the corresponding clamping intervals, the winding film is fed into the film jacking plates, and the film jacking plates are driven by the reset assemblies to be away from each other in the horizontal direction to be reset. No matter the winding film is in a horizontal attaching state or a single-side inclined state initially, the winding film can enter the clamping distance regularly under the rigid guiding and pushing action of the film ejecting plate.

Description

Technical Field

[0001] This invention relates to the field of gypsum board processing technology, and more specifically to a film clamping mechanism for a gypsum board stretch wrapping machine. Background Technology

[0002] The general process of gypsum board wrapping is as follows: the conveyor belt slowly moves the stack of gypsum boards through the packaging station, and the packaging machine drives the roll of wrapping film to rotate circumferentially to wrap the gypsum boards. Before wrapping, the free end of the roll of wrapping film is usually clamped and fixed by a film clamping device to prevent the free end from rotating with the packaging machine.

[0003] Existing conventional film clamping devices are generally multi-clamping block series structure with a pre-reserved gap between adjacent clamping blocks. Initially, the operator pulls the free end of the film on one side of the conveyor chain plate and controls the packaging machine to drive the film roll to the bottom of the clamping block, so that the released film adheres to the bottom surface of the clamping block. Then, the adjacent clamping blocks are controlled to move horizontally closer together, clamping and fixing the film between the gaps of the adjacent clamping blocks.

[0004] If the wrapping film is not parallel to the bottom surface of the clamping block, but is tilted downwards on one side, when the clamping blocks move closer together, the film on the tilted side cannot be clamped between adjacent clamping blocks because it is far away from the working surface of the clamping block, resulting in the free end being easy to loosen and the clamping not being tight. Summary of the Invention

[0005] To address this issue, the present invention provides a film clamping mechanism for a gypsum board stretch film packaging machine, thereby solving the technical problem in the prior art where the stretch film is not parallel to the bottom surface of the clamping block and the side away from the clamping block cannot be clamped.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0007] A film clamping mechanism for a gypsum board stretch film packaging machine, comprising:

[0008] A plurality of cylindrical clamping blocks are arranged side by side below the conveyor chain plate along the gypsum board conveying direction. A clamping gap is provided between adjacent cylindrical clamping blocks. Each cylindrical clamping block can move closer to each other in the horizontal direction to clamp the wrapping film at its bottom.

[0009] Multiple top film plates are arranged below the cylindrical clamping block along the gypsum board conveying direction, and the top film plates are arranged in a one-to-one correspondence with the clamping spacing. Each top film plate can move closer to or further away from each other under the push of a horizontal external force.

[0010] A lifting power device is disposed below the top membrane panel and connected to each of the top membrane panels. The lifting power device is used to drive each of the top membrane panels to perform synchronous lifting and lowering movements.

[0011] When the lifting power device drives each of the top membrane plates to rise synchronously, each top membrane plate pushes the winding film at the bottom of the cylindrical clamping block into the corresponding clamping distance. Then, the cylindrical clamping blocks move closer to each other to clamp the winding film. At the same time, the top membrane plates are pushed closer to each other by the horizontal force of the cylindrical clamping blocks and are clamped in the corresponding clamping distance.

[0012] A reset assembly is connected between each of the adjacent top membrane plates. After the lifting power device drives each top membrane plate to move down synchronously and exit the clamping distance, the reset assembly drives each top membrane plate to move away from each other in the horizontal direction and reset.

[0013] Furthermore, a horizontal mounting groove is provided below the cylindrical clamping block, with the opening of the horizontal mounting groove pointing vertically upwards;

[0014] Multiple slide seats are movably arranged along the length of the horizontal mounting groove. Each slide seat corresponds to a top membrane plate, and each top membrane plate is installed on top of the corresponding slide seat.

[0015] Each of the aforementioned skateboard seats is able to move closer to or further away from each other following the top membrane plate on its top.

[0016] Furthermore, a channel is formed on both inner walls of the horizontal mounting groove along its length.

[0017] A pulley is provided laterally on both sides of each of the skateboard seats, and the periphery of each pulley is at least partially embedded in the groove on the corresponding side, and each pulley is rotatable;

[0018] When the top membrane plates approach each other, the pulley rolls along the length of the channel following the corresponding top membrane plate;

[0019] When the top membrane plates move away from each other, the pulleys follow the corresponding top membrane plates and roll in the opposite direction along the length of the channel.

[0020] Furthermore, the reset assembly includes a first reset spring;

[0021] A first return spring is connected between each adjacent sliding plate seat;

[0022] When the top membrane plates approach each other, the slide plate seat follows the corresponding top membrane plates to approach each other, and the first return spring is compressed and stores elastic potential energy;

[0023] After the top membrane plate exits the clamping distance, the first reset spring releases its elastic potential energy and pushes the slide plate seat connected to it away from each other, and the slide plate seat drives the corresponding top membrane plate away from each other.

[0024] Furthermore, the bottom of each of the said skateboard seats is located away from the inner bottom of the horizontal mounting slot.

[0025] Furthermore, a limiting spring is horizontally connected to the outer side of each of the two sides of the sliding plate seat, and the other end of each limiting spring is connected to the inner sidewall of each end of the horizontal mounting groove.

[0026] Furthermore, two connecting plates are provided on the upper and lower sides of each of the skateboard seats, and the pulley is disposed between the two connecting plates;

[0027] A through hole is provided in the center of the pulley, and a central shaft is vertically installed through the through hole. The two ends of the central shaft are respectively connected to the inner sidewalls of the upper and lower connecting plates.

[0028] Furthermore, the lifting power device includes a drive cylinder, the drive end of which is connected to the bottom of the horizontal mounting slot.

[0029] Furthermore, multiple mounting rods are arranged in a rectangular row below the conveyor chain plate, with each mounting rod positioned along the gypsum board conveying direction;

[0030] Each of the cylindrical clamping blocks is provided with multiple mounting holes.

[0031] The mounting holes are provided one-to-one with the mounting rods, and each cylindrical clamping block is mounted side by side on the mounting rod through the mounting holes.

[0032] Furthermore, a pair of centering clamping mechanisms are provided below the conveyor chain plate, which are used to clamp the cylindrical clamping blocks close to each other;

[0033] Multiple second return springs are horizontally connected between adjacent cylindrical clamping blocks. After the centering clamping mechanism releases the cylindrical clamping blocks, the second return springs drive each cylindrical clamping block to reset.

[0034] Compared with the prior art, the present invention has the following advantages:

[0035] This invention involves placing a top film plate below the clamping distance between adjacent cylindrical clamping blocks. A lifting power device drives the top film plate to rise synchronously, actively pushing and forcibly feeding the wrapping film into the corresponding clamping distance. Regardless of whether the wrapping film is initially in a horizontally attached state or a unilaterally tilted state, it can be neatly inserted into the clamping distance under the rigid guidance and pushing action of the top film plate. Subsequently, the cylindrical clamping blocks approach each other and clamp the wrapping film. Then, the lifting power device drives the top film plate to descend and reset, so that the free end of the wrapping film is uniformly clamped between adjacent cylindrical clamping blocks along its width direction, ensuring the clamping tightness. Attached Figure Description

[0036] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0037] Figure 1 This is a front view schematic diagram of the film clamping mechanism of a gypsum board stretch film packaging machine provided in an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the overall internal structure of the horizontal mounting groove in an embodiment of the present invention;

[0039] Figure 3 This is a sectional view of the side structure inside the horizontal mounting groove in an embodiment of the present invention;

[0040] Figure 4 for Figure 3 A magnified structural diagram of A in the middle.

[0041] The labels in the diagram represent the following:

[0042] 1. Cylindrical clamping block; 2. Conveyor chain plate; 3. Clamping spacing; 4. Top membrane plate; 5. Horizontal mounting groove; 6. Slide plate seat; 7. Channel; 8. Pulley; 9. First return spring; 10. Limiting spring; 11. Connecting plate; 12. Central shaft; 13. Drive cylinder; 14. Mounting rod; 15. Centering clamping mechanism; 16. Second return spring; 17. Support plate;

[0043] 151. Threaded shaft; 152. Fixed shaft; 153. Clamping arm; 154. Drive motor. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] like Figure 1 , Figure 2 As shown, the present invention provides a film clamping mechanism for a gypsum board stretch film packaging machine, comprising:

[0046] A cylindrical clamping block 1 is arranged in parallel below the conveyor chain plate 2 along the gypsum board conveying direction. A clamping gap 3 is provided between adjacent cylindrical clamping blocks 1. Each cylindrical clamping block 1 can move closer to each other in the horizontal direction to clamp the wrapping film at its bottom.

[0047] Multiple top film plates 4 are arranged below the cylindrical clamping block 1 along the gypsum board conveying direction, and the top film plates 4 are arranged in a one-to-one correspondence with the clamping spacing 3. Each top film plate 4 can move closer or further away from each other under the push of a horizontal external force.

[0048] A lifting power device is located below the top membrane panel 4 and connected to each top membrane panel 4. The lifting power device is used to drive each top membrane panel 4 to perform synchronous lifting and lowering movements.

[0049] When the lifting power device drives each top membrane plate 4 to rise synchronously, each top membrane plate 4 pushes the wrapping film at the bottom of the cylindrical clamping block 1 into the corresponding clamping distance 3. Then the cylindrical clamping blocks 1 move closer to each other to clamp the wrapping film. At the same time, the top membrane plates 4 are pushed closer to each other by the horizontal force of the cylindrical clamping blocks 1 and are clamped in the corresponding clamping distance 3.

[0050] A reset assembly is connected between each adjacent top membrane plate 4. After the lifting power device drives each top membrane plate 4 to move down synchronously and exit the clamping gap 3, the reset assembly drives each top membrane plate 4 to move away from each other in the horizontal direction and reset.

[0051] This invention provides a top film plate 4 positioned below the clamping distance 3 between adjacent cylindrical clamping blocks 1. A lifting power device drives the top film plate 4 to rise synchronously, actively pushing and forcibly inserting the wrapping film into the corresponding clamping distance 3. Regardless of whether the wrapping film is initially in a horizontally aligned state or tilted on one side, it can be neatly inserted into the clamping distance 3 under the rigid guidance and pushing action of the top film plate 4. Subsequently, the cylindrical clamping blocks 1 move closer together and clamp the wrapping film. Then, the lifting power device drives the top film plate 4 to descend and reset, ensuring that the free end of the wrapping film is uniformly clamped between adjacent cylindrical clamping blocks 1 along its width direction, guaranteeing a tight clamping.

[0052] This invention provides a film clamping mechanism for a gypsum board wrapping machine, which mainly addresses the problems of film falling off and loosening at the free end during the gypsum board wrapping process. By optimizing the clamping structure design, the free end of the wrapping film is stably locked.

[0053] Specifically, the packaging machine drives the film roll to the bottom of the cylindrical clamping block 1. The released wrapping film is located below the cylindrical clamping block 1 and is tilted to one side. The lifting power device is activated, and the lifting power device synchronously drives the top film plate 4 to move upward. Each top film plate 4 rises smoothly, and its top gradually contacts and presses against the wrapping film. As the top film plate 4 continues to rise, the top film plate 4 actively pushes and forces the wrapping film into the corresponding clamping gap 3. The lifting power device stops running and then controls each cylindrical clamping block 1 to move closer to each other and clamp the wrapping film. At the same time, the top film plate 4 is also clamped between adjacent cylindrical clamping blocks 1. The lifting power device is activated again, and the lifting power device drives the top film plate 4 to move downward synchronously. The top film plate 4 is disengaged from the clamping gap 3 between adjacent cylindrical clamping blocks 1. The circumferential rotation mechanism of the packaging machine continues to drive the rolled wrapping film to rotate circumferentially, wrapping the outer periphery of the stack of gypsum boards on the conveyor chain plate 2.

[0054] When adjacent cylindrical clamping blocks 1 move toward each other and gradually approach the top membrane plate 4, their sidewalls will apply horizontal squeezing force to the top membrane plate 4 located within the clamping gap 3, pushing each top membrane plate 4 to approach each other in the horizontal direction until the top membrane plate 4 is tightly clamped between adjacent cylindrical clamping blocks 1.

[0055] After the top membrane plate 4 moves down with the lifting power device and exits the clamping distance 3, the reset component can automatically drive each top membrane plate 4 to move away from each other in the horizontal direction and return to the initial working position, in preparation for the next top membrane and clamping action.

[0056] To prevent the clamped wrapping film from being pulled out along with the top film plate 4 during the process of exiting from the clamping gap 3, the top film plate 4 is made of a material with a friction coefficient lower than that of the cylindrical clamping block 1. By reducing the frictional contact resistance between the top film plate 4 and the wrapping film, the stable clamping state of the wrapping film is ensured.

[0057] Since the cylindrical clamping block 1 has a circular structure, in order to better adapt to its shape and improve the pushing effect of the membrane, the top membrane plate 4 is set as an arc plate that adapts to the cylindrical clamping block 1. The inner arc surface of the arc plate fits the outer circumferential surface contour of the cylindrical clamping block 1, which can further optimize the positioning accuracy and clamping reliability of the top membrane.

[0058] like Figure 2 As shown, in order to facilitate the installation of multiple top membrane panels 4, a horizontal mounting groove 5 is also provided below the cylindrical clamping block 1, and the opening of the horizontal mounting groove 5 is set vertically upward.

[0059] Multiple slide seats 6 are movably arranged along the length of the horizontal mounting groove 5. Each slide seat 6 corresponds to a top membrane plate 4, and each top membrane plate 4 is installed on top of the corresponding slide seat 6.

[0060] Each skateboard seat 6 can move closer to or further away from each other, following the top membrane plate 4 on its top.

[0061] The horizontal mounting groove 5 provides an installation platform for the top membrane panel 4, integrating multiple top membrane panels 4 into one unit, which facilitates the synchronous lifting and lowering of the lifting drive device. The horizontal mounting groove 5 also provides a guide track for the horizontal movement (moving closer to / away from each other) of the top membrane panels 4, and by constraining the movement trajectory of the sliding plate seat 6, the top membrane panel 4 can only move in the horizontal direction.

[0062] like Figure 3 , Figure 4 As shown, a channel 7 is opened on both inner walls of the horizontal mounting groove 5 along its length.

[0063] A pulley 8 is provided laterally on both sides of each skateboard seat 6. The periphery of each pulley 8 is at least partially embedded in the groove 7 on the corresponding side, and each pulley 8 is rotatable.

[0064] When the top membrane plates 4 approach each other, the pulley 8 rolls along the length of the channel 7 following the corresponding top membrane plate 4.

[0065] When the top membrane plates 4 move away from each other, the pulley 8 follows the corresponding top membrane plate 4 and rolls in the opposite direction along the length of the channel 7.

[0066] By engaging the pulleys 8 on both sides of each skateboard seat 6 with the groove 7, the left and right movement of the skateboard seat 6 and the top membrane plate 4 is restricted. At the same time, the static friction between the skateboard seat 6 and the horizontal mounting groove 5 is transformed into rolling friction between the pulleys 8 and the groove 7, which effectively reduces the friction generated when the skateboard seat 6 moves, and ensures the smooth horizontal movement of the top membrane plate 4.

[0067] Furthermore, when the top membrane plate 4 pushes the wrapping film into the clamping gap 3, it will be subject to the vertical downward resistance of the wrapping film. When the lifting power device drives the top membrane plate 4 to exit between the two cylindrical clamping blocks 1, the top membrane plate 4 will be subject to the vertical upward pulling force of the cylindrical clamping blocks 1. Through the design of the horizontal engagement structure between the pulley 8 and the channel 7, the lifting and lowering movement of the top membrane plate 4 caused by the above-mentioned resistance and pulling force is effectively restricted.

[0068] The reset assembly is used to move the top membrane plate 4 away from each other and reset it. The reset assembly includes a first reset spring 9.

[0069] A first return spring 9 is connected between each adjacent slide seat 6;

[0070] When the top membrane plates 4 approach each other, the slide seat 6 follows the corresponding top membrane plates 4 to approach each other, and the first return spring 9 is compressed and stores elastic potential energy.

[0071] After the top membrane plate 4 exits the clamping gap 3, the first reset spring 9 releases its elastic potential energy and pushes the slide seat 6 connected to it away from each other, and the slide seat 6 drives the corresponding top membrane plate 4 away from each other.

[0072] The first reset spring 9 drives the adjacent top membrane plates 4 to move away from each other to reset. In order to further reduce the resistance when the top membrane plates 4 are reset, the bottom of each slide seat 6 is far away from the inner bottom of the horizontal mounting groove 5.

[0073] At this time, each skateboard seat 6 is only connected to the horizontal mounting groove 5 through the pulleys 8 on both sides, which minimizes the contact area between the skateboard seat 6 and the horizontal mounting groove 5, effectively reducing the frictional resistance between the two, so that the elastic potential energy released by the first return spring 9 can be more efficiently converted into the return power of the top membrane plate 4, reducing power loss, and ensuring that each top membrane plate 4 is directly below the original corresponding clamping distance 3 after being reset.

[0074] like Figure 2 As shown, multiple top membrane plates 4 and corresponding slide seats 6 are interconnected by a first reset spring 9 to form an integral structure that can move horizontally within the horizontal mounting groove 5. Since this integral structure can move freely along the horizontal mounting groove 5, if its two ends are not limited, it is easy to deviate to either end of the horizontal mounting groove 5 during horizontal movement. In order to limit the integral structure, a limiting spring 10 is horizontally connected to the outer side of the slide seats 6 on both sides. The other end of each limiting spring 10 is connected to the inner sidewall of both ends of the horizontal mounting groove 5. Through the constraint of the limiting spring 10, the risk of integral structure displacement is effectively avoided.

[0075] like Figure 4 As shown, in order to enable the pulley 8 to rotate on the skateboard seat 6, two connecting plates 11 are provided on the upper and lower sides of each skateboard seat 6, and the pulley 8 is located between the two connecting plates 11.

[0076] A through hole is provided in the center of the pulley 8, and a central shaft 12 is vertically installed in the through hole. The two ends of the central shaft 12 are respectively connected to the inner side walls of the upper and lower connecting plates 11.

[0077] In order to synchronously drive the lifting of each top membrane panel 4, the lifting power device includes a drive cylinder 13, the drive end of which is connected to the bottom of the horizontal mounting groove 5.

[0078] The drive cylinder 13 drives the lifting and lowering of each top membrane plate 4 in sync with the lifting and lowering of the horizontal mounting slot 5.

[0079] like Figure 1 As shown, in order to install multiple cylindrical clamping blocks 1, multiple mounting rods 14 are arranged in a rectangular row below the conveyor chain plate 2, and each mounting rod 14 is set along the gypsum board conveying direction.

[0080] Multiple mounting holes are provided through each cylindrical clamping block 1;

[0081] The mounting holes are set one-to-one with the mounting rods 14, and each cylindrical clamping block 1 is mounted side by side on the mounting rods 14 through the mounting holes.

[0082] By matching the mounting holes with the mounting rods 14 one by one, each cylindrical clamping block 1 is fitted onto the mounting rod 14, and each cylindrical clamping block 1 moves closer to each other along the length of the mounting rod 14 to clamp the wrapping film.

[0083] In order to drive each cylindrical clamping block 1 to move closer to each other, a pair of centering clamping mechanisms 15 are also provided below the conveyor chain plate 2. The centering clamping mechanisms 15 are used to clamp the cylindrical clamping blocks 1 to move closer to each other.

[0084] The centering clamping mechanism 15 includes:

[0085] A threaded shaft 151 is located below the conveyor chain plate 2. The threaded shaft 151 is arranged along the conveying direction of the gypsum board. The outer wall of the threaded shaft 151 is provided with two sections of threads with opposite directions.

[0086] A fixed shaft 152 is fixedly disposed below the threaded shaft 151, and the fixed shaft 152 is disposed along the length direction of the threaded shaft 151;

[0087] Clamping arms 153 are threadedly installed on the two shaft sections of the threaded shaft 151 with opposite directions of rotation. Each clamping arm 153 is also provided with a limit hole. The two clamping arms 153 are respectively installed on the fixed shaft 152 through the two limit holes. The bottoms of the two clamping arms 153 are located on the outside of the cylindrical clamping blocks 1 on both sides.

[0088] A drive motor 154 is located below the conveyor chain plate 2 and is used to drive the threaded shaft 151 to rotate. The drive end of the drive motor 154 is connected to one end of the threaded shaft 151.

[0089] The drive motor 154 drives the threaded shaft 151 to rotate, and the threaded shaft 151 synchronously drives the two clamping arms 153 to move towards each other, so as to clamp the cylindrical clamping blocks 1 from the outer walls of the cylindrical clamping blocks 1 on both sides towards the middle.

[0090] The drive motor 154 drives the threaded shaft 151 to rotate in the opposite direction. The threaded shaft 151 synchronously drives the two clamping arms 153 to move in opposite directions to release the cylindrical clamping block 1.

[0091] The fixed shaft 152 cooperates with the threaded shaft 151 to restrict the two clamping arms 153 from rotating around the threaded shaft 151.

[0092] In order to fix the centering clamping mechanism 15 below the conveyor chain plate 2, a support plate 17 is fixedly installed at the bottom of the frame on which the conveyor chain plate 2 is mounted. The two ends of the threaded shaft 151 are respectively rotatably connected to the inner walls of the two ends of the support plate 17. The two ends of the fixed shaft 152 are respectively fixedly connected to the inner walls of the two ends of the support plate 17. The drive motor 154 is fixedly connected to the outer wall of one end of the support plate 17, and its drive end passes through the support plate 17 and is connected to one end of the threaded shaft 151.

[0093] The bottom of the frame is lower than the bottom of the conveyor chain plate 2, so it will not affect the rotation of the conveyor chain plate 2.

[0094] After the cylindrical clamping block 1 is released, each cylindrical clamping block 1 needs to move away from each other and reset, on the one hand to release the free end of the winding film, and on the other hand to prepare for the next clamping. In order to drive each cylindrical clamping block 1 to move away from each other and reset, multiple second reset springs 16 are horizontally connected between adjacent cylindrical clamping blocks 1. After the centering clamping mechanism 15 releases the clamping of the cylindrical clamping block 1, the second reset springs 16 drive each cylindrical clamping block 1 to reset.

[0095] When this device is in use, the conveyor chain plate 2 drives the whole stack of gypsum board slowly through the packaging station. The operator pulls the free end of the wrapping film on one side of the conveyor chain plate 2 and operates the packaging machine to drive the film roll to the bottom of the cylindrical clamping block 1. The released wrapping film is located at the bottom of the cylindrical clamping block 1 and is in a state of tilting to one side.

[0096] Start the drive cylinder 13, which drives the horizontal mounting groove 5 to move upward as a whole, thereby synchronously driving each top film plate 4 in the groove to rise. The top of each top film plate 4 gradually contacts and presses against the wrapping film. As the top film plate 4 continues to rise, the top film plate 4 actively pushes and forces the wrapping film into the corresponding clamping gap 3.

[0097] Start the drive motor 154, drive the threaded shaft 151 to rotate, the threaded shaft 151 drives the two clamping arms 153 to move towards each other, the two clamping arms 153 squeeze from the outside of the cylindrical clamping blocks 1 on both sides towards the middle, push all the cylindrical clamping blocks 1 to come together and clamp the winding film within the clamping gap 3. As the cylindrical clamping blocks 1 come closer to each other, their side walls will apply horizontal squeezing force to the top film plate 4 within the clamping gap 3, pushing each top film plate 4 from both sides towards the middle;

[0098] Start the drive cylinder 13, and the horizontal mounting slot 5 of the drive cylinder 13 moves downward as a whole, thereby synchronously driving all the slide seats 6 and the top membrane plate 4 to descend in the vertical direction, and the top membrane plate 4 disengages from the clamping gap 3 between the two cylindrical clamping blocks 1.

[0099] The circumferential rotation mechanism of the packaging machine continues to drive the roll of wrapping film to rotate in a circumferential direction, performing normal wrapping work around the entire stack of gypsum board. At the same time, the first reset spring 9 pushes the top film plate 4 connected to it to move away from each other and reset.

[0100] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A film clamping mechanism for a gypsum board stretch film packaging machine, characterized in that, have: A cylindrical clamping block (1) is arranged in parallel below the conveyor chain plate (2) along the gypsum board conveying direction. A clamping gap (3) is provided between adjacent cylindrical clamping blocks (1). Each cylindrical clamping block (1) can move closer to each other in the horizontal direction to clamp the wrapping film at its bottom. Multiple top film plates (4) are arranged below the cylindrical clamping block (1) along the gypsum board conveying direction, and the top film plates (4) are arranged in a one-to-one correspondence with the clamping spacing (3). Each top film plate (4) can move closer or further away from each other under the push of a horizontal external force. A lifting power device is located below the top membrane plate (4) and connected to each of the top membrane plates (4). The lifting power device is used to drive each of the top membrane plates (4) to perform synchronous lifting movements. When the lifting power device drives each of the top membrane plates (4) to rise synchronously, each of the top membrane plates (4) pushes the winding film at the bottom of the cylindrical clamping block (1) into the corresponding clamping distance (3). The cylindrical clamping blocks (1) move closer to each other and clamp the winding film. At the same time, the top membrane plates (4) are pushed closer to each other by the horizontal force of the cylindrical clamping blocks (1) and are clamped in the corresponding clamping distance (3). A reset assembly is connected between each of the adjacent top membrane plates (4). After the lifting power device drives each top membrane plate (4) to move down synchronously and exit the clamping distance (3), the reset assembly drives each top membrane plate (4) to move away from each other in the horizontal direction and reset.

2. The film clamping mechanism of a gypsum board stretch film packaging machine according to claim 1, characterized in that, A horizontal mounting groove (5) is also provided below the cylindrical clamping block (1), and the opening of the horizontal mounting groove (5) is set vertically upward; Multiple slide seats (6) are movably arranged in the horizontal mounting groove (5) along its length direction. The slide seats (6) are arranged in a one-to-one correspondence with the top membrane plate (4), and each top membrane plate (4) is installed on the top of the corresponding slide seat (6). Each of the said skateboard seats (6) is able to move closer to or further away from each other following the top membrane plate (4) on top of it.

3. The film clamping mechanism of a gypsum board stretch film packaging machine according to claim 2, characterized in that, A channel (7) is provided on both inner walls along the length of the horizontal mounting groove (5); A pulley (8) is provided laterally on both sides of each of the skateboard seats (6). The periphery of each pulley (8) is at least partially embedded in the groove (7) on the corresponding side, and each pulley (8) is rotatable. When the top membrane plates (4) approach each other, the pulley (8) follows the corresponding top membrane plate (4) and rolls along the length direction of the channel (7); When the top membrane plates (4) move away from each other, the pulley (8) follows the corresponding top membrane plate (4) and rolls in the opposite direction along the length of the channel (7).

4. The film clamping mechanism of a gypsum board stretch film packaging machine according to claim 2, characterized in that, The reset assembly includes a first reset spring (9); A first return spring (9) is connected between each adjacent slide seat (6); When the top membrane plates (4) approach each other, the slide plate seat (6) follows the corresponding top membrane plates (4) to approach each other, and the first return spring (9) is compressed and stores elastic potential energy; After the top membrane plate (4) exits the clamping distance (3), the first reset spring (9) releases its elastic potential energy and pushes the slide plate seat (6) connected to it away from each other, and the slide plate seat (6) drives the corresponding top membrane plate (4) away from each other.

5. The film clamping mechanism of a gypsum board stretch film packaging machine according to claim 2, characterized in that, The bottom of each of the said skateboard seats (6) is away from the inner bottom of the horizontal mounting slot (5).

6. The film clamping mechanism of a gypsum board stretch film packaging machine according to claim 2, characterized in that, A limiting spring (10) is horizontally connected to the outer side of each of the two sides of the sliding plate seat (6), and the other end of each limiting spring (10) is connected to the inner sidewall of both ends of the horizontal mounting groove (5).

7. The film clamping mechanism of a gypsum board stretch film packaging machine according to claim 3, characterized in that, Two connecting plates (11) are provided on the upper and lower sides of each of the skateboard seats (6), and the pulley (8) is located between the two connecting plates (11); A through hole is provided in the center of the pulley (8), and a central shaft (12) is vertically installed in the through hole. The two ends of the central shaft (12) are respectively connected to the inner sidewalls of the upper and lower connecting plates (11).

8. The film clamping mechanism of a gypsum board stretch film packaging machine according to claim 2, characterized in that, The lifting power device includes a drive cylinder (13), the drive end of which is connected to the bottom of the horizontal mounting slot (5).

9. The film clamping mechanism of a gypsum board stretch film packaging machine according to claim 1, characterized in that, Multiple mounting rods (14) are arranged in a rectangular row below the conveyor chain plate (2), and each mounting rod (14) is set along the gypsum board conveying direction; Each of the cylindrical clamping blocks (1) is provided with multiple mounting holes; The mounting holes are provided one-to-one with the mounting rods (14), and each cylindrical clamping block (1) is mounted side by side on the mounting rods (14) through the mounting holes.

10. The film clamping mechanism of a gypsum board stretch film packaging machine according to claim 1, characterized in that, Below the conveyor chain plate (2), a pair of centering clamping mechanisms (15) are also provided. The centering clamping mechanisms (15) are used to clamp the cylindrical clamping blocks (1) close to each other. Multiple second return springs (16) are horizontally connected between adjacent cylindrical clamping blocks (1). After the centering clamping mechanism (15) releases the clamping of the cylindrical clamping block (1), the second return springs (16) drive each cylindrical clamping block (1) to reset.

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