Buffer type bag sealing machine for cigarette carton distribution plastic bags

Abstract

The utility model provides a buffer type packing machine for carton cigarette distribution plastic package, which comprises a pushing device, a thermoplastic film releasing device, a packing device and a thermoplastic film temporary storage device, the thermoplastic film releasing device and the packing device are respectively arranged on two sides of the pushing device, an inlet of the packing device is opposite to the pushing device, and the thermoplastic film temporary storage device is arranged on the packing device. The thermoplastic film temporary storage device is arranged between the thermoplastic film releasing device and the packaging device and located above the pushing device, the thermoplastic film releasing device releases a thermoplastic film towards the packaging device, and the released thermoplastic film penetrates through the thermoplastic film temporary storage device to be cached, then extends towards the packaging device and is blocked at an inlet of the packaging device. The pushing device pushes cigarette packets to abut against the thermoplastic film at the inlet of the packaging device to enter the packaging device for packaging, the thermoplastic film buffering device is pulled to release the thermoplastic film in the process that the thermoplastic film enters the packaging device, the release speed of the thermoplastic film releasing device is buffered, and the packaging efficiency is improved. And the thermoplastic film is prevented from being pulled by the pushing device or the packaging device.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic packing for cigarette carton delivery, and in particular to a buffer-type packing machine for plastic packing for cigarette carton delivery. Background Art

[0002] In commercial tobacco distribution centers, cigarette distributors distribute cigarette cartons of different brands and quantities according to the order requirements of cigarette retailers. In order to facilitate distribution by distribution personnel, the distributed cigarette cartons need to be stacked and arranged, and then thermoplastically packaged using a heat shrink film packaging machine. Before thermoplasticization, the stacked cigarette cartons need to be wrapped with thermoplastic film by a thermoplastic film packaging machine for packaging. Since the number of cigarette cartons distributed in each cigarette carton package is different, some cigarette cartons with a large number of cigarette cartons occupy a larger volume, and the larger cigarette cartons also require a larger amount of thermoplastic film when wrapping the thermoplastic film. In the process of packaging larger cigarette cartons, the existing thermoplastic film packaging machine has the problem of the plastic film releasing device on the thermoplastic film packaging machine not releasing the thermoplastic film in time, resulting in insufficient supply of the thermoplastic film, causing the thermoplastic film packaging machine to pull the thermoplastic film hard, and in severe cases even tear the thermoplastic film or pull the plastic film roll to offset. Utility Model Content

[0003] In view of this, it is necessary to provide a buffer-type packaging machine for plastic packages of cigarette cartons, which can cache and release thermoplastic film to ensure sufficient supply of thermoplastic film and solve the problem of pulling the thermoplastic film during the packaging of larger cigarette cartons.

[0004] The invention relates to a buffer-type packaging machine for delivering plastic packages of cigarette strips, comprising a pushing device for pushing cigarette strip packages, a thermoplastic film releasing device, a packaging device and a thermoplastic film caching device, wherein the thermoplastic film releasing device and the packaging device are respectively arranged on both sides of the pushing device, and the entrance of the packaging device is opposite to the pushing device, and the thermoplastic film caching device is arranged between the thermoplastic film releasing device and the packaging device, and is located above the pushing device, and the thermoplastic film releasing device releases the thermoplastic film in the direction of the packaging device, and the released thermoplastic film passes through the thermoplastic film caching device, is cached by the thermoplastic film caching device, and then extends in the direction of the packaging device and is blocked at the entrance of the packaging device, and the pushing device pushes the cigarette strip package to be packaged to press against the thermoplastic film blocking the entrance of the packaging device and synchronously enter the packaging device for packaging, and the thermoplastic film can pull the thermoplastic film caching device to release it during the process of entering the packaging device, so as to buffer the release speed of the thermoplastic film releasing device and prevent the pushing device or the packaging device from causing hard pulling on the thermoplastic film.

[0005] Preferably, the pushing device includes a conveyor belt, a push plate and a pushing arm for conveying cigarette packs, the conveyor belts are arranged in parallel, the packing device is arranged on one side of the conveyor belt along its conveying direction, and the entrance of the packing device faces the conveyor belt and is flush with the conveying surface of the conveyor belt, the pushing arm is transversely arranged on the other side of the conveyor belt along its conveying direction, the telescopic end of the pushing arm faces the packing device, the push plate is arranged at the telescopic end of the pushing arm and faces the entrance of the packing device, the thermoplastic film releasing device is arranged on the same side of the conveyor belt as the pushing arm, the thermoplastic film buffer device is arranged above the conveyor belt, the thermoplastic film released by the thermoplastic film releasing device passes through the thermoplastic film buffer device and is blocked at the entrance of the packing device, the pushing arm drives the push plate to telescopically move toward the packing device to push the cigarette packs on the conveyor belt to move toward the entrance of the packing device, and the cigarette packs are synchronously entered into the packing device for packing by pressing against the thermoplastic film blocking the entrance of the packing device.

[0006] Preferably, the thermoplastic film releasing device comprises an upward film roll releasing rack and a downward film roll releasing rack carrying the thermoplastic film roll, the upward film roll releasing rack and the downward film roll releasing rack are respectively arranged above and below the pushing arm, and can respectively release the thermoplastic film in the direction of the packaging device, a channel for the thermoplastic film to pass through is arranged between the packaging device and the conveyor belt, and a guide rack is arranged in parallel directly above the channel, the thermoplastic film released by the upward film roll releasing rack passes through the thermoplastic film buffer device, is buffered by the thermoplastic film buffer device, and can be movably placed at the entrance of the packaging device after passing through the guide rack; the thermoplastic film released by the downward film roll releasing rack passes over the conveyor belt The lower rear edge of the belt enters the entrance of the packaging device along the channel. The packaging device can press down the thermoplastic film released by the upper film roll release rack to make it contact with the thermoplastic film released by the lower film roll release rack, and can weld the two to connect them together to block the entrance of the packaging device. The pushing arm drives the push plate to telescopically move toward the packaging device to push the cigarette packs on the conveyor belt to move toward the entrance of the packaging device, and the cigarette packs are pressed against the thermoplastic film blocking the entrance of the packaging device to synchronously enter the packaging device for packaging. In the process of entering the packaging device, the thermoplastic film can pull the thermoplastic film buffer device to release it.

[0007] Preferably, the thermoplastic film buffer device comprises a bracket, a first buffer rack, and a second buffer rack, the bracket is transversely arranged above the conveyor belt and located between the upward film roll release rack and the packaging device, the bracket is parallelly arranged with a first guide roller at one end close to the upward film roll release rack, the first buffer rack and the second buffer rack are movably arranged on the bracket and located between the first guide roller and the packaging device, and the second buffer rack is located above the guide rack, and the first buffer rack is located below the second buffer rack, the first buffer rack and the second buffer rack can approach or move away from each other, and the thermoplastic film released by the upward film roll release rack detours along the first guide roller. After bypassing the first guide roller, it descends along the first guide roller, bypasses the first cache rack, then ascends and bypasses the second cache rack, and then descends along the second cache rack through the guide rack and rests at the entrance of the packaging device. When the first cache rack and the second cache rack are away from each other, the length of the thermoplastic film released by the ascending film roll release rack between the first cache rack and the second cache rack can be increased to cache the thermoplastic film. When the cigarette pack enters the packaging device against the thermoplastic film, the first cache rack and the second cache rack can approach each other under the pulling force of the thermoplastic film entering the packaging device to release the cached thermoplastic film and prevent the pushing device from pulling the thermoplastic film.

[0008] Preferably, the first cache rack includes a first guide roller and a first swing arm, one end of the first swing arm is rotatably arranged on the bracket, and the other end of the first swing arm is a free end, the free end of the first swing arm extends in the direction of the packaging device and can swing freely up and down along the bracket, the first guide roller is parallelly installed at the free end of the first swing arm, and is parallel and aligned with the first guide roller, and the first guide roller presses down the first swing arm under the action of its own gravity, so that the first swing arm rotates downward along the bracket and hangs below the bracket; the second cache rack includes a second guide roller, a counterweight block and a second swing arm, the middle part of the second swing arm is rotatably arranged on the bracket, the two ends of the second swing arm are respectively facing the upward film roll release rack and the packaging device, and can rotate freely up and down along the bracket, the second guide roller is parallelly installed at one end of the second swing arm facing the packaging device, and is parallel and aligned with the first guide roller, the counterweight block is installed at one end of the second swing arm facing the upward film roll release rack, and the counterweight block is used to counterweight the second swing arm, so as to achieve The second guide roller of the second swing arm is pressed down by gravity, so that one end of the second swing arm provided with the second guide roller can rotate upward along the bracket and be suspended above the bracket, so that it is away from the first guide roller. The thermoplastic film released by the upward film roll releasing rack bypasses the first guide roller and then descends along the first guide roller, bypasses the first guide roller and then ascends and bypasses the second guide roller, and then descends along the second guide roller and passes through the guide rack to rest at the entrance of the packaging device. When the first buffer rack and the second buffer rack are away from each other, the length of the thermoplastic film released by the upward film roll releasing rack between the first buffer rack and the second buffer rack can be increased for caching the thermoplastic film. When the cigarette pack enters the packaging device against the thermoplastic film, the thermoplastic film entering the packaging device pulls the second guide roller downward, so that the second swing arm drives the second guide roller to rotate downward, and at the same time, the thermoplastic film pulls the first guide roller upward, so that the first swing arm drives the first guide roller to rotate upward, so that the second guide roller and the first guide roller are close to each other, so as to release the cached thermoplastic film.

[0009] Preferably, a downwardly extending limit rod is also provided at the lower end of the bracket, and the limit rod is located below the first swing arm. The first swing arm can be placed on the limit rod when it rotates downward along the bracket. The first swing arm is limited by the limit rod so that the position of the first guide roller hanging below the bracket is not lower than the guide frame.

[0010] Preferably, an auxiliary film releasing mechanism is further arranged between the upward film roll releasing frame and the first guide roller, and the auxiliary film releasing mechanism comprises an adjusting frame and a film pressing roller, and the adjusting frames are two, which are respectively arranged between the upward film roll releasing frame and the first guide roller and located on both sides of the upward film roll releasing frame, and slide grooves are respectively arranged vertically on the two adjusting frames, and the lower ends of the slide grooves are lower than the upward film roll releasing frame, and the film pressing roller is transversely arranged between the upward film roll releasing frame and the first guide roller, and the two ends of the film pressing roller are respectively movably arranged The film pressing roller is mounted on the slide grooves of the two adjustment frames and slides freely up and down along the slide grooves. The film pressing roller presses on the thermoplastic film released by the upward film roll releasing frame, and uses its own gravity to make the thermoplastic film droop between the upward film roll releasing frame and the first guide roller, thereby increasing the buffer length of the thermoplastic film. When the cigarette pack enters the packaging device against the thermoplastic film, the film pressing roller can move upward along the slide groove under the pulling force of the thermoplastic film entering the packaging device to release the thermoplastic film drooping between the upward film roll releasing frame and the first guide roller.

[0011] Preferably, the packaging device includes a film pressing platform and a fusing mechanism, the film pressing platform is arranged parallel to one side of the conveyor belt along its conveying direction and is flush with the conveying surface of the conveyor belt, the end of the film pressing platform facing the conveyor belt is the entrance of the above-mentioned packaging device, the fusing mechanism is arranged at the entrance, the channel is arranged between the film pressing platform and the conveyor belt, and the guide frame and the channel are respectively located on the side of the fusing mechanism facing the conveyor belt, the fusing mechanism can press down the thermoplastic film released by the upward film roll releasing frame and buffered by the thermoplastic film buffer device, so that it contacts with the thermoplastic film released by the downward film roll releasing frame, and can fuse the two to connect the two together to block the sealing package At the entrance of the film pressing platform, the pushing device can push the cigarette pack against the connected thermoplastic films along the entrance of the film pressing platform into the film pressing platform. An auxiliary film pressing mechanism is arranged directly above the film pressing platform, and the auxiliary film pressing mechanism includes a supporting frame, a film pressing plate and a telescopic arm. The supporting frame is arranged above the film pressing platform, and the telescopic arm is vertically arranged on the supporting frame, and the telescopic end of the telescopic arm faces the film pressing platform. The film pressing plate is arranged parallel to the telescopic end of the telescopic arm and is located directly above the film pressing platform. The telescopic arm can drive the film pressing plate to move downward, so that the film pressing plate will press the thermoplastic film located on the upper surface of the cigarette pack entering the film pressing platform onto the cigarette pack, so as to assist the fusing mechanism to seal the cigarette pack.

[0012] Preferably, the fusing mechanism comprises a connecting frame, a telescopic pressure rod, a lower pressure arm and a heat sealer, the heat sealer being transversely arranged on the upper end surface at the entrance of the film pressing platform, the connecting frame being across directly above the heat sealer, the telescopic pressure rod being vertically arranged on the upper end of the connecting frame, the telescopic end of the telescopic pressure rod being toward the heat sealer, slide rails being vertically arranged on the side walls on opposite sides of the connecting frame, the slide rails being respectively located on both sides of the entrance of the film pressing platform, the lower pressure arm being transversely arranged at the telescopic end of the telescopic pressure rod, the two ends of the lower pressure arm being respectively mounted on the slide rails, and the lower pressure arm being directly opposite to the heat sealer, the guide frame and the channel being respectively located on the side of the lower pressure arm and the heat sealer facing the conveyor belt, and the telescopic pressure rod being able to drive the lower pressure arm The pressing roller is moved up and down along the slide rail to press the thermoplastic film passing through the guide frame and the entrance of the film pressing platform through the channel toward the heat sealing machine through the lower pressing arm, so as to weld the two together through the heat sealing machine. In the process of pressing the thermoplastic film downward, the thermoplastic film passing through the guide frame forms a pulling force on the second guide roller and the first guide roller under the downward pressure of the lower pressing arm, so that the second guide roller and the first guide roller are close to each other to release the thermoplastic film buffered between the second guide roller and the first guide roller, and the thermoplastic film simultaneously forms a pulling force on the film pressing roller, so that the film pressing roller moves upward along the slide groove to release the thermoplastic film hanging between the upper film roll release frame and the first guide roller.

[0013] Preferably, lateral extrusion mechanisms are also provided on both sides of the film pressing platform, and the lateral extrusion mechanisms respectively include lateral support frames, extrusion arms and extrusion side plates. The lateral support frames are respectively relatively arranged on both sides of the upper end surface of the film pressing platform, and the extrusion arms are respectively relatively arranged on the two support frames and can move telescopically in opposite directions. The extrusion side plates are respectively relatively arranged at the telescopic ends of the extrusion arms, and a packaging channel is formed between the two extrusion side plates. After the pushing device pushes the cigarette pack against the connected thermoplastic film into the packaging channel, the two extrusion arms can synchronously push the two extrusion side plates to perform relative telescopic movements to clamp and fix the two sides of the cigarette pack entering the packaging channel.

[0014] The utility model adopts the above technical scheme, and its beneficial effects are: by arranging a thermoplastic film buffer device between the thermoplastic film releasing device and the packaging device, the thermoplastic film released by the thermoplastic film releasing device in the direction of the packaging device passes through the thermoplastic film buffer device, is buffered by the thermoplastic film buffer device, and then extends in the direction of the packaging device and is blocked at the entrance of the packaging device, and the pushing device pushes the cigarette pack to be packaged to press against the thermoplastic film blocking at the entrance of the packaging device and synchronously enters the packaging device for packaging, and in the process of the cigarette pack pressing against the thermoplastic film entering the packaging device, the thermoplastic film can pull the thermoplastic film buffer device to release the buffered thermoplastic film, and the thermoplastic film is buffered by the thermoplastic film buffer device, which can effectively buffer the release speed of the thermoplastic film releasing device, so that the thermoplastic film is sufficiently supplied to the packaging device, and can avoid the pushing device from pulling the thermoplastic film during the pushing process and the packaging device from pulling the thermoplastic film during the packaging process, and also avoid the phenomenon of tearing the thermoplastic film or pulling and deflecting the plastic film roll. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0016] Figure 2 This is a schematic structural diagram of the utility model from another angle.

[0017] Figure 3 It is a side structural schematic diagram of the utility model.

[0018] Figure 4 for Figure 3 Schematic diagram of the AA section structure along the middle.

[0019] In the figure: a pushing device 10, a conveyor belt 101, a pushing arm 102, a pushing plate 103, a thermoplastic film releasing device 20, an upward film roll releasing frame 201, a downward film roll releasing frame 202, a packaging device 30, a film pressing platform 301, a fuse mechanism 302, a connecting frame 3021, a telescopic pressing rod 3022, a lower pressing arm 3023, a heat sealing machine 3024, a slide rail 3025, an auxiliary film pressing mechanism 303, a supporting frame 3031, a film pressing plate 3032, a telescopic arm 3033, a lateral squeezing mechanism 304, a supporting frame 3041, and a squeezing arm 30 42, extrusion side plate 3043, thermoplastic film buffer device 40, bracket 401, first buffer rack 402, first guide roller 4021, first swing arm 4022, second buffer rack 403, second guide roller 4031, second swing arm 4032, counterweight 4033, first guide roller 404, limit rod 405, auxiliary film release mechanism 50, adjustment rack 501, film pressing roller 502, slide groove 503, channel 60, guide rack 70, third buffer rack 80, third guide roller 801, third swing arm 802, second guide roller 803. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Please see Figures 1 to 3 The embodiment of the utility model provides a buffer-type packaging machine for plastic packages of cigarette strips, including a pushing device 10 for pushing cigarette strip packages, a thermoplastic film releasing device 20, a packaging device 30 and a thermoplastic film buffer device 40, wherein the thermoplastic film releasing device 20 and the packaging device 30 are respectively arranged on both sides of the pushing device 10, and the entrance of the packaging device 30 is directly opposite to the pushing device 10, the thermoplastic film releasing device 20 is used to carry a rolled thermoplastic film roll and release the thermoplastic film toward the packaging device 30, the thermoplastic film buffer device 40 is arranged between the thermoplastic film releasing device 20 and the packaging device 30, and is located above the pushing device 10, the thermoplastic film released by the thermoplastic film releasing device 20 passes through the thermoplastic film buffer device 40, is cached by the thermoplastic film buffer device 40 and then is packaged. The pushing device 10 pushes the cigarette pack to be packed against the thermoplastic film blocking the entrance of the packing device 30 and synchronously enters the packing device 30 for packing operation. During the process of the cigarette pack entering the packing device 30, the thermoplastic film can pull the thermoplastic film buffer device 40 to release the buffered thermoplastic film. During the packing operation, the thermoplastic film releasing device 20 continuously releases the thermoplastic film to the thermoplastic film buffer device 40, and the thermoplastic film is pre-buffered by the thermoplastic film buffer device 40. The thermoplastic film buffer device 40 buffers the release speed of the thermoplastic film releasing device 20, so that the supply of thermoplastic film is sufficient, thereby avoiding the situation where the pushing device 10 or the packing device 30 causes hard pulling of the thermoplastic film during the packing process.

[0022] Specifically, the pushing device 10 includes a conveyor belt 101 for conveying cigarette packs, a push plate 103 and a push arm 102. The conveyor belt 101 is arranged in parallel. The packaging device 30 is arranged on one side of the conveyor belt 101 along its conveying direction, and the entrance of the packaging device 30 faces the conveyor belt 101 and is flush with the conveying surface of the conveyor belt 101. The pushing arm 102 is a cylinder or an electric push rod. The pushing arm 102 is horizontally arranged on the other side of the conveyor belt 101 along its conveying direction. The telescopic end of the pushing arm 102 faces the packaging device 30. The push plate 103 is a vertically arranged plate body, which is arranged at the telescopic end of the pushing arm 102. The thermoplastic film releasing device 20 is arranged on the same side of the conveyor belt 101 and the pushing arm 102, and the thermoplastic film buffer device 40 is arranged above the conveyor belt 101. The thermoplastic film released by the thermoplastic film releasing device 20 passes through the thermoplastic film buffer device 40 and is blocked at the entrance of the packing device 30. The pushing arm 102 drives the push plate 103 to move telescopically toward the packing device 30 to push the cigarette packs on the conveyor belt 101 to move toward the entrance of the packing device 30, and the cigarette packs are pressed against the thermoplastic film blocking the entrance of the packing device 30 to synchronously enter the packing device 30 for packing.

[0023] The thermoplastic film releasing device 20 comprises an upward film roll releasing rack 201 and a downward film roll releasing rack 202 which can carry rolled thermoplastic film rolls. The upward film roll releasing rack 201 and the downward film roll releasing rack 202 are respectively arranged above and below the pushing arm 102, and can respectively release the thermoplastic film in the direction of the packaging device 30. A channel 60 for the thermoplastic film to pass through is arranged between the packaging device 30 and the conveyor belt 101, and a guide rack 70 is arranged in parallel directly above the channel 60. The thermoplastic film released by the upward film roll releasing rack 201 passes through the thermoplastic film buffer device 40, is buffered by the thermoplastic film buffer device 40, and can be movably placed at the entrance of the packaging device 30 after passing through the guide rack 70. The thermoplastic film released by the downward film roll releasing rack 202 passes under the conveyor belt 101. After entering the entrance of the packaging device 30 along the channel 60, the packaging device 30 can press down the thermoplastic film released by the upward film roll release rack 201 to make it contact with the thermoplastic film released by the downward film roll release rack 202, and can weld the two to connect the two together to block the entrance of the packaging device 30. The pushing arm 102 drives the pushing plate 103 to telescopically move toward the packaging device 30 to push the cigarette packs on the conveyor belt 101 to move toward the entrance of the packaging device 30, and the cigarette packs are pushed against the thermoplastic film blocking the entrance of the packaging device 30 to synchronously enter the packaging device 30 for packaging. In the process of being pushed into the packaging device 30, the thermoplastic film can pull the thermoplastic film buffer device 40 to release the thermoplastic film cached by it.

[0024] Please continue to see Figure 2 and Figure 3 The thermoplastic film buffer device 40 includes a bracket 401, a first buffer rack 402, and a second buffer rack 403. The bracket 401 is transversely arranged above the conveyor belt 101 and is located between the upward film roll release rack 201 and the packaging device 30. The bracket 401 is parallelly arranged with a first guide roller 404 at one end close to the upward film roll release rack 201. The first guide roller 404 is directly opposite to the upward film roll release rack 201. The first buffer rack 402 and the second buffer rack 403 are respectively movably arranged on the bracket 401 and are located between the first guide roller 404 and the packaging device 30. , and the second cache rack 403 is located above the guide rack 70, and the first cache rack 402 is located below the second cache rack 403, the first cache rack 402 and the second cache rack 403 can be close to or away from each other, respectively, the thermoplastic film released by the upward film roll release rack 201 goes around the top of the first guide roller 404, goes down along the first guide roller 404 after bypassing the first guide roller 404, goes up and bypasses the second cache rack 403 after bypassing the first cache rack 402, and then goes down along the second cache rack 403 and passes through the guide rack 70 and is placed at the entrance of the packaging device 30, the first The buffer rack 402 and the second buffer rack 403 can move away from each other by their own gravity, increase the distance between each other, and increase the length of the thermoplastic film released by the upward film roll release rack 201 between the first buffer rack 402 and the second buffer rack 403, so as to cache the thermoplastic film. When the pushing device 10 pushes the cigarette pack against the thermoplastic film to enter the packaging device 30, the thermoplastic film entering one end of the packaging device 30 forms a pulling effect on the first buffer rack 402 and the second buffer rack 403. Under the pulling force, the first buffer rack 402 and the second buffer rack 403 can be brought closer to each other. The thermoplastic films cached between each other are released, so that the thermoplastic films are sufficiently supplied to the packaging device 30 and can smoothly enter the packaging device 30. When the pushing device 10 returns, the first cache rack 402 and the second cache rack 403 use their own gravity to pull the thermoplastic films released by the upward film roll releasing rack 201 away from each other again, and cache the thermoplastic films again. Such repeated work can buffer the release speed of the thermoplastic film releasing device 20, so that the thermoplastic film is sufficiently supplied to the packaging device 30, and the pushing device 10 can be prevented from pulling the thermoplastic film hard during the pushing process.

[0025] Specifically, the first buffer rack 402 includes a first guide roller 4021 and a first swing arm 4022. One end of the first swing arm 4022 is rotatably arranged on the bracket 401, and the other end of the first swing arm 4022 is a free end. The free end of the first swing arm 4022 extends toward the packaging device 30 and can freely swing up and down along the bracket 401. The first guide roller 4021 is parallelly installed at the free end of the first swing arm 4022, and is parallel and aligned with the first guide roller 404. The first guide roller 4021 presses down the first swing arm 4022 under its own gravity, so that the first swing arm 4022 rotates downward along the bracket 401 and hangs below the bracket 401.The second buffer rack 403 includes a second guide roller 4031, a counterweight 4033 and a second swing arm 4032. The middle part of the second swing arm 4032 is rotatably arranged on the bracket 401. The two ends of the second swing arm 4032 are respectively facing the upward film roll release rack 201 and the packaging device 30, and can rotate freely up and down along the bracket 401. The second guide roller 4031 is parallelly installed at one end of the second swing arm 4032 facing the packaging device 30, and is parallel and aligned with the first guide roller 4021. The counterweight 4033 is installed at one end of the second swing arm 4032 facing the upward film roll release rack 201 The weight of the counterweight block 4033 is a preset weight, which is used to counterweight the second swing arm 4032. The counterweight block 4033 is used to press down the second swing arm 4032, so that one end of the second guide roller 4031 set on the second swing arm 4032 can rotate upward along the bracket 401 and hang above the bracket 401, so that it is away from the first guide roller 4021, and the second guide roller 4031 is located above the guide frame 70. The thermoplastic film released by the upward film roll release frame 201 bypasses the first guide roller 404 and then goes down along the first guide roller 404, bypasses the first guide roller 4021, and then goes up and bypasses the second guide roller 4031. Then, the film is moved downward along the second guide roller 4031, passes through the guide frame 70, and rests at the entrance of the packaging device 30. The first guide roller 4021, under the action of its own gravity, presses down the thermoplastic film, so that the thermoplastic film hangs below the bracket 401. The second guide roller 4031, under the action of the counterweight 4033, turns to the top of the bracket 401, away from the first guide roller 4021 and the guide frame 70, and lifts the thermoplastic film above the bracket 401. After the first guide roller 4021 and the second guide roller 4031 move away from each other, the thermoplastic film released by the upward film roll release frame 201 can be increased between the first guide roller 4021 and the second guide roller 4031 is used to cache the thermoplastic film. When the push plate 103 pushes the cigarette pack against the thermoplastic film to enter the packaging device 30, the thermoplastic film entering the packaging device 30 forms a downward pulling force on the second guide roller 4031, so that the second swing arm 4032 drives the second guide roller 4031 to rotate downward and approach the guide frame 70. At the same time, the thermoplastic film can also form an upward pulling force on the first guide roller 4021, so that the first swing arm 4022 drives the first guide roller 4021 to rotate upward, so that the first guide roller 4021 and the second guide roller 4031 are close to each other, so as to release the cached thermoplastic film. ;

[0026] Please continue to see Figure 2 and Figure 3Furthermore, a downwardly extending limit rod 405 is also provided at the lower end of the bracket 401, and the limit rod 405 is located in the middle part below the first swing arm 4022. After the first swing arm 4022 rotates downward along the bracket 401, the middle part of the first swing arm 4022 can be placed on the limit rod 405. The limit rod 405 limits the downward rotation angle of the first swing arm 4022, so that the position of the first guide roller 4021 hanging below the bracket 401 is not lower than the guide frame 70.

[0027] Please see Figure 1 and Figure 3 Furthermore, an auxiliary film releasing mechanism 50 is provided between the upward film roll releasing frame 201 and the first guide roller 404, and the auxiliary film releasing mechanism 50 includes an adjusting frame 501 and a film pressing roller 502. The adjusting frames 501 are two, which are respectively arranged between the upward film roll releasing frame 201 and the first guide roller 404 and located on both sides of the upward film roll releasing frame 201. The two adjusting frames 501 are respectively vertically provided with slide grooves 503, and the lower ends of the slide grooves 503 are lower than the upward film roll releasing frame 201. The film pressing roller 502 is transversely arranged between the upward film roll releasing frame 201 and the first guide roller 404. The two ends of the film pressing roller 502 are respectively movably mounted on the slide grooves 503 of the two adjusting frames 501, and can slide freely up and down along the slide grooves 503. The laminating roller 502 is pressed on the thermoplastic film released by the upward film roll release rack 201. The laminating roller 502 uses its own gravity to make the thermoplastic film sag between the upward film roll release rack 201 and the first guide roller 404, thereby increasing the buffer length of the thermoplastic film and forming a second buffer area between the upward film roll release rack 201 and the first guide roller 404. When the push plate 103 pushes the cigarette pack against the thermoplastic film to enter the packaging device 30, the thermoplastic film entering the packaging device 30 forms a pulling force on the second guide roller 4031 and the first guide roller 4021, and can also form a pulling force on the laminating roller 502, so that the laminating roller 502 can move upward along the slide groove 503 under the pulling force of the thermoplastic film to release the thermoplastic film sag between the upward film roll release rack 201 and the first guide roller 404.

[0028] Please see Figure 3 and Figure 4Further, the packaging device 30 includes a film pressing platform 301 and a fuse mechanism 302. The film pressing platform 301 is arranged parallel to one side of the conveyor belt 101 along its conveying direction and is flush with the conveying surface of the conveyor belt 101. The end of the film pressing platform 301 facing the conveyor belt 101 is the entrance of the above-mentioned packaging device 30. The fuse mechanism 302 is arranged at the entrance. The channel 60 is arranged between the film pressing platform 301 and the conveyor belt 101, and the guide frame 70 and the channel 60 are respectively located on the side of the fuse mechanism 302 facing the conveyor belt 101. The fuse mechanism 302 can press down the thermoplastic film released by the upward film roll release frame 201 and buffered by the thermoplastic film buffer device 40 and the auxiliary film release mechanism 50, so that it contacts with the thermoplastic film released by the downward film roll release frame 202, and can weld the two so that the two are connected together to block the entrance of the packaging device 30. The pushing device 10 can push the cigarette pack against the connected thermoplastic films along the entrance of the film pressing platform 301 into the film pressing platform 301. An auxiliary film pressing mechanism 303 is arranged directly above the film pressing platform 301. The auxiliary film pressing mechanism 303 includes a carrier frame 3031, a film pressing plate 3032 and a telescopic arm 3033. The carrier frame 3031 is arranged above the film pressing platform 301, and the telescopic arm 3033 is vertically arranged on the carrier frame 3031. The telescopic end of the telescopic arm 3033 faces the film pressing platform 301. The film pressing plate 3032 is arranged parallel to the telescopic end of the telescopic arm 3033 and is located directly above the film pressing platform 301. The telescopic arm 3033 can drive the film pressing plate 3032 to move downward, so that the film pressing plate 3032 presses the thermoplastic film on the upper surface of the cigarette pack entering the film pressing platform 301 onto the cigarette pack, so as to assist the fusing mechanism 302 in sealing the cigarette pack.

[0029] Specifically, the fuse mechanism 302 includes a connecting frame 3021, a telescopic pressure rod 3022, a lower pressure arm 3023 and a heat sealer 3024. The heat sealer 3024 is a thermoplastic film welding machine, which is horizontally arranged on the upper end surface at the entrance of the film pressing platform 301. The connecting frame 3021 spans directly above the heat sealer 3024. The telescopic pressure rod 3022 is vertically arranged at the upper end of the connecting frame 3021. The telescopic pressure rod 3022 is a cylinder or an electric push rod. The telescopic end faces the heat sealer 3024, and slide rails 3025 are vertically arranged on the side walls on opposite sides of the connecting frame 3021. The slide rails 3025 are respectively located on both sides of the entrance of the film pressing platform 301. The lower pressure arm 3023 is horizontally arranged at the telescopic end of the telescopic pressure rod 3022. The two ends of the lower pressure arm 3023 are respectively installed on the slide rails 3025, and the lower pressure arm 3023 is directly opposite to the heat sealer 3024. The guide frame 70 and the channel 60 are respectively located at the lower pressure arm 3023 and the heat sealer. The telescopic pressing rod 3024 is directed toward the side of the conveyor belt 101, and the telescopic pressing rod 3022 can drive the lower pressing arm 3023 to move up and down along the slide rail 3025. When the lower pressing arm 3023 moves downward, the thermoplastic film released by the upper film roll releasing rack 201 and buffered by the thermoplastic film buffer device 40 and the auxiliary film releasing mechanism 50 can be pressed downward to make it contact with the thermoplastic film released by the lower film roll releasing rack 202, thereby wrapping the cigarette pack, and the two can be pressed toward the heat sealing machine 3024 to pass through the heat sealing machine 30 24 are used to weld the two together so as to complete the sealing of the cigarette packs entering the laminating platform 301. When welding the two, the heat sealing machine 3024 can disconnect the sealing of the cigarette packs from the thermoplastic film and keep the thermoplastic film released by the upward film roll releasing rack 201 and the thermoplastic film released by the downward film roll releasing rack 202 connected together, so that the pushing device 10 can push the subsequent cigarette packs to continue to press against the connected thermoplastic films into the laminating platform 301 for sealing.When the lower pressing arm 3023 is pressing the thermoplastic film downward, the thermoplastic film forms a pulling force on the second guide roller 4031 and the first guide roller 4021 under the downward pressing force of the lower pressing arm 3023, so that the second guide roller 4031 and the first guide roller 4021 are close to each other to release the thermoplastic film buffered between the second guide roller 4031 and the first guide roller 4021, and the thermoplastic film simultaneously forms a pulling force on the film pressing roller 502, so that the film pressing roller 502 moves upward along the slide groove 503 to release the thermoplastic film drooping between the upward film roll release frame 201 and the first film roll release frame 201. As the thermoplastic film between the first guide rollers 404 shrinks and returns upward, the second guide roller 4031 returns to the top of the bracket 401 under the action of the counterweight 4033, and the first guide roller 4021 and the film pressing roller 502 are pressed down again under the action of their own gravity to cache the thermoplastic film again. Such repeated work can buffer the release speed of the thermoplastic film releasing device 20, so that the thermoplastic film is sufficiently supplied to the packaging device 30, and the lower pressure arm 3023 can be prevented from pulling the thermoplastic film hard during the downward pressing process.

[0030] In the above embodiment, the above-mentioned thermoplastic film buffer device 40 is mainly used to buffer the thermoplastic film released by the upward film roll release rack 201. During the packaging process, the thermoplastic film released by the upward film roll release rack 201 needs to wrap the front end, upper end and rear end of the cigarette pack, and the required amount is relatively large. The thermoplastic film released by the upward film roll release rack 201 is buffered by the thermoplastic film buffer device 40, so that the thermoplastic film is sufficiently supplied to the packaging device 30, which can effectively avoid the phenomenon of hard pulling of the thermoplastic film by the pushing device 10 in the process of pushing the cigarette pack and the lower pressing arm 3023 in the process of pressing the thermoplastic film.

[0031] Please continue to see Figure 1 Furthermore, lateral extrusion mechanisms 304 are respectively provided on both sides of the film pressing platform 301, and the lateral extrusion mechanisms 304 respectively include lateral support frames 3041, extrusion arms 3042 and extrusion side plates 3043. The lateral support frames 3041 are respectively relatively arranged on both sides of the upper end surface of the film pressing platform 301, and the extrusion arms 3042 are cylinders or electric push rods, which are respectively relatively arranged on the two support frames 3041, and the telescopic ends of the extrusion arms 3042 can telescopically move in opposite directions. The extrusion side plates 3043 are respectively relatively arranged at the telescopic ends of the extrusion arms 3042, and a packaging channel is formed between the two extrusion side plates 3043. After the pushing device 10 pushes the cigarette pack against the connected thermoplastic film into the packaging channel, the two extrusion arms 3042 can synchronously push the two extrusion side plates 3043 to perform relative telescopic movements, so as to clamp and fix the two sides of the cigarette pack entering the packaging channel.

[0032] Please continue to see Figure 2 and Figure 3Furthermore, a third buffer rack 80 is provided below the conveyor belt 101, and the third buffer rack 80 is used to buffer the thermoplastic film released by the downstream film roll release rack 202. Specifically, the third buffer rack 80 includes a third guide roller 801 and a third swing arm 802. One end of the third swing arm 802 is rotatably provided below the conveyor belt 101, and the other end is a free end. The free end extends toward the packaging device 30 and freely rotates up and down along the rotatable end of the third swing arm 802. The third guide roller 801 is transversely installed at the free end of the third swing arm 802 and is directly opposite to the downstream film roll release rack 202. A second guide roller 803 is transversely provided at the rotatable end of the third swing arm 802. The second guide roller 803 and the third guide roller 801 are parallel and aligned with each other. The thermoplastic film released by the downstream film roll release rack 202 goes around the second guide roller 803 and rests on The third guide roller 801 passes through the channel 60 and enters the entrance of the film pressing platform 301. The third guide roller 801 uses its own gravity to press the thermoplastic film downward, so that the thermoplastic film released by the downward film roll release rack 202 hangs down under the conveyor belt 101, which is used to cache the thermoplastic film released by the downward film roll release rack 202. The thermoplastic film released by the upward film roll release rack 201 and the thermoplastic film released by the downward film roll release rack 202 are welded together by the fusing mechanism 302 at the entrance of the packaging device 30. When the push plate 103 pushes the cigarette pack against the connected thermoplastic films and enters the film pressing platform 301 at the same time, the connected thermoplastic films can simultaneously pull the thermoplastic film cache device 40, the auxiliary film release mechanism 50 and the third cache rack 80, so that the cached thermoplastic films of each are released.

[0033] When the packaging machine is used, the thermoplastic film released by the upward film roll releasing rack 201 and the downward film roll releasing rack 202 is released toward the film pressing platform 301. The thermoplastic film released by the upward film roll releasing rack 201 is buffered by the auxiliary film releasing mechanism 50 and the plastic film buffer device and then penetrates into the film pressing platform 301. The thermoplastic film released by the downward film roll releasing rack 202 passes through the channel 60 and penetrates into the film pressing platform 301 in parallel with the thermoplastic film released by the upward film roll releasing rack 201. The telescopic pressing rod 3022 is started to drive the lower pressing arm 3023 downward to The thermoplastic film released by the upward film roll release rack 201 is pressed downward to make it contact with the thermoplastic film released by the downward film roll, and the two are pressed on the heat sealer 3024 at the same time to be welded, so that the two are connected together, so that the thermoplastic film forms a vertical diaphragm wall at the entrance of the film pressing platform 301, and the telescopic pressure rod 3022 drives the lower pressure arm 3023 to return to the starting position upward, and then the push arm 102 is started to drive the push plate 103 to push the cigarette packs stacked on the conveyor belt 101 to move toward the film pressing platform 301, so that the cigarette packs press against the welded thermoplastic films and enter at the same time In the film pressing platform 301, the thermoplastic films connected together can simultaneously pull the thermoplastic film buffer device 40, the auxiliary film releasing mechanism 50 and the third buffer rack 80 during the process of entering the film pressing platform 301, so that the thermoplastic films buffered by the thermoplastic film buffer device 40, the auxiliary film releasing mechanism 50 and the third buffer rack 80 are released. After the pushing arm 102 pushes the cigarette pack into place, the auxiliary film pressing mechanism 303 is started to press down to fix the thermoplastic film and the cigarette pack. At this time, the pushing arm 102 returns to the starting position, and the telescopic pressing rod 3022 is started to drive the pressing mechanism 303 to press down. The arm 3023 is pressed down again, and the thermoplastic film released by the upward film roll release rack 201 is pressed toward the heat sealer 3024 again, so that the thermoplastic film wraps the rear end of the cigarette pack, makes it contact with the thermoplastic film released by the downward film roll, and the two are welded again by the heat sealer 3024 to seal the cigarette pack. In the process of pressing down the thermoplastic film, the lower pressing arm 3023 forms a pulling force on the thermoplastic film buffer device 40 and the auxiliary film release mechanism 50 again, so that the thermoplastic film buffer device 40 and the auxiliary film release mechanism 50 release the cached thermoplastic film again. When the heat sealer 3024 welds the two, it can disconnect the thermoplastic film entering the entrance of the film pressing platform 301 from the welding position and keep the thermoplastic film at the entrance of the film pressing platform 301 connected together, so that the pushing device 10 can push the subsequent cigarette packs to continue to press against the connected thermoplastic films into the film pressing platform 301 for sealing. The thermoplastic film released by the upward film roll release rack 201 and the downward film roll release rack 202 is continuously cached by the thermoplastic film buffer device 40, the auxiliary film release mechanism 50 and the third buffer rack 80, thereby preventing the lower pressure arm 3023 and the pushing device 10 from pulling the thermoplastic film hard during the pushing and packaging process, thereby preventing the thermoplastic film from being torn or the plastic film roll from being pulled and deflected, thereby improving the operating stability of the packaging machine.

[0034] The above disclosure is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

1. A buffer-type packing machine for plastic packing of cigarette cartons, characterized in that: The invention comprises a pushing device, a thermoplastic film releasing device, a packing device and a thermoplastic film caching device for pushing cigarette packs. The thermoplastic film releasing device and the packing device are respectively arranged on both sides of the pushing device, and the entrance of the packing device is opposite to the pushing device. The thermoplastic film caching device is arranged between the thermoplastic film releasing device and the packing device and is located above the pushing device. The thermoplastic film releasing device releases the thermoplastic film in the direction of the packing device. The released thermoplastic film passes through the thermoplastic film caching device, is cached by the thermoplastic film caching device, and then extends in the direction of the packing device and is blocked at the entrance of the packing device. The pushing device pushes the cigarette packs to be packed against the thermoplastic film blocking the entrance of the packing device and synchronously enters the packing device for packing. In the process of entering the packing device, the thermoplastic film can pull the thermoplastic film caching device to release it, so as to buffer the release speed of the thermoplastic film releasing device and prevent the pushing device or the packing device from pulling the thermoplastic film hard.

2. The buffer type packing machine for plastic packing of cigarette cartons as claimed in claim 1, characterized in that: The pushing device includes a conveyor belt, a push plate and a pushing arm for conveying cigarette packs. The conveyor belts are arranged in parallel, and the packing device is arranged on one side of the conveyor belt along its conveying direction, and the entrance of the packing device faces the conveyor belt and is flush with the conveying surface of the conveyor belt. The pushing arm is transversely arranged on the other side of the conveyor belt along its conveying direction, and the telescopic end of the pushing arm faces the packing device. The push plate is arranged at the telescopic end of the pushing arm and faces the entrance of the packing device. The thermoplastic film releasing device is arranged on the same side of the conveyor belt as the pushing arm, and the thermoplastic film buffer device is arranged above the conveyor belt. The thermoplastic film released by the thermoplastic film releasing device passes through the thermoplastic film buffer device and is blocked at the entrance of the packing device. The pushing arm drives the push plate to telescopically move toward the packing device to push the cigarette packs on the conveyor belt toward the entrance of the packing device, and the cigarette packs are synchronously entered into the packing device for packing by pressing against the thermoplastic film blocking the entrance of the packing device.

3. The buffer-type packing machine for plastic packing of cigarette cartons as claimed in claim 2, characterized in that: The thermoplastic film releasing device comprises an upward film roll releasing rack and a downward film roll releasing rack carrying the plastic film roll, the upward film roll releasing rack and the downward film roll releasing rack are respectively arranged above and below the pushing arm, and can respectively release the thermoplastic film in the direction of the packaging device, a passage for the thermoplastic film to pass through is arranged between the packaging device and the conveyor belt, and a guide rack is arranged in parallel just above the passage, the thermoplastic film released by the upward film roll releasing rack passes through the thermoplastic film buffer device, is buffered by the thermoplastic film buffer device, and can be movably placed at the entrance of the packaging device after passing through the guide rack; the thermoplastic film released by the downward film roll releasing rack passes over the lower edge of the conveyor belt The packing device then moves along the passage to the entrance of the packing device, and the packing device can press down the thermoplastic film released by the upward film roll releasing rack to make it contact with the thermoplastic film released by the downward film roll releasing rack, and can weld the two to connect the two together to block the entrance of the packing device. The pushing arm drives the push plate to telescopically move toward the packing device to push the cigarette packs on the conveyor belt to move toward the entrance of the packing device, and the cigarette packs are synchronously entered into the packing device for packing by pressing against the thermoplastic film blocking the entrance of the packing device. In the process of entering the packing device, the thermoplastic film can pull the thermoplastic film buffer device to release it.

4. The buffer-type packing machine for plastic packing of cigarette cartons as claimed in claim 3, characterized in that: The thermoplastic film caching device comprises a bracket, a first cache rack and a second cache rack. The bracket is transversely arranged above the conveyor belt and is located between the upward film roll releasing rack and the packaging device. The bracket is parallelly arranged with a first guide roller at one end of the bracket close to the upward film roll releasing rack. The first cache rack and the second cache rack are respectively movably arranged on the bracket and are located between the first guide roller and the packaging device. The second cache rack is located above the guide rack and the first cache rack is located below the second cache rack. The first cache rack and the second cache rack can respectively approach or move away from each other. The thermoplastic film released by the upward film roll releasing rack detours along the top of the first guide roller and bypasses the first film roll releasing rack. After the first guide roller, it moves downward along the first guide roller, bypasses the first buffer rack, then moves upward and bypasses the second buffer rack, and then moves downward along the second buffer rack, passes through the guide rack, and rests at the entrance of the packaging device. When the first buffer rack and the second buffer rack are away from each other, the length of the thermoplastic film released by the upward film roll release rack between the first buffer rack and the second buffer rack can be increased, which is used to cache the thermoplastic film. When the cigarette pack enters the packaging device against the thermoplastic film, the first buffer rack and the second buffer rack can approach each other under the pulling force of the thermoplastic film entering the packaging device, so as to release the cached thermoplastic film and prevent the pushing device from pulling the thermoplastic film.

5. The buffer-type packing machine for plastic packing of cigarette cartons as claimed in claim 4, characterized in that: The first cache rack includes a first guide roller and a first swing arm, one end of the first swing arm is rotatably arranged on the bracket, and the other end of the first swing arm is a free end, the free end of the first swing arm extends in the direction of the packaging device, and can swing freely up and down along the bracket, the first guide roller is parallelly installed at the free end of the first swing arm, and is parallel and aligned with the first guide roller, and the first guide roller presses down the first swing arm under the action of its own gravity, so that the first swing arm rotates downward along the bracket and hangs below the bracket; the second cache rack includes a second guide roller, a counterweight block and a second swing arm, the middle part of the second swing arm is rotatably arranged on the bracket, the two ends of the second swing arm are respectively facing the upward film roll release rack and the packaging device, and can rotate freely up and down along the bracket, the second guide roller is parallelly installed at one end of the second swing arm facing the packaging device, and is parallel and aligned with the first guide roller, the counterweight block is installed at one end of the second swing arm facing the upward film roll release rack, and the counterweight block is used to counterweight the second swing arm, using the weight The second guide roller is suspended above the bracket by the force applied to the second swing arm, so that the second swing arm is provided with one end of the second guide roller and rotates upward along the bracket and is suspended above the bracket, so that it moves away from the first guide roller. The thermoplastic film released by the upward film roll releasing rack bypasses the first guide roller and then descends along the first guide roller, bypasses the first guide roller and then ascends and bypasses the second guide roller, and then descends along the second guide roller and passes through the guide rack and rests at the entrance of the packaging device. When the first buffer rack and the second buffer rack are away from each other, the length of the thermoplastic film released by the upward film roll releasing rack between the first buffer rack and the second buffer rack can be increased for caching the thermoplastic film. When the cigarette pack enters the packaging device against the thermoplastic film, the thermoplastic film entering the packaging device pulls the second guide roller downward, so that the second swing arm drives the second guide roller to rotate downward, and at the same time, the thermoplastic film pulls the first guide roller upward, so that the first swing arm drives the first guide roller to rotate upward, so that the second guide roller and the first guide roller are close to each other, so as to release the cached thermoplastic film.

6. The buffer type packing machine for plastic packing of cigarette cartons as claimed in claim 5, characterized in that: A downwardly extending limit rod is also provided at the lower end of the bracket, and the limit rod is located below the first swing arm. The first swing arm can be placed on the limit rod when it rotates downward along the bracket. The first swing arm is limited by the limit rod so that the position of the first guide roller hanging below the bracket is not lower than the guide frame.

7. The buffer type packing machine for plastic packing of cigarette cartons as claimed in claim 6, characterized in that: The lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of the lifting of 8. The buffer-type packing machine for plastic packing of cigarette cartons as claimed in claim 7, characterized in that: The packaging device comprises a film pressing platform and a fusing mechanism, wherein the film pressing platform is arranged parallel to one side of the conveyor belt along its conveying direction and is flush with the conveying surface of the conveyor belt, the end of the film pressing platform facing the conveyor belt is the entrance of the above-mentioned packaging device, the fusing mechanism is arranged at the entrance, the channel is arranged between the film pressing platform and the conveyor belt, and the guide frame and the channel are respectively located on the side of the fusing mechanism facing the conveyor belt, the fusing mechanism can press down the thermoplastic film released by the upward film roll releasing frame and buffered by the thermoplastic film buffer device, so that it contacts with the thermoplastic film released by the downward film roll releasing frame, and can fuse the two to connect the two together to block the thermoplastic film released by the packaging device. At the entrance, the pushing device can push the cigarette pack against the connected thermoplastic films along the entrance of the film pressing platform into the film pressing platform. An auxiliary film pressing mechanism is arranged directly above the film pressing platform, and the auxiliary film pressing mechanism includes a supporting frame, a film pressing plate and a telescopic arm. The supporting frame is arranged above the film pressing platform, and the telescopic arm is vertically arranged on the supporting frame, and the telescopic end of the telescopic arm faces the film pressing platform. The film pressing plate is arranged parallel to the telescopic end of the telescopic arm and is located directly above the film pressing platform. The telescopic arm can drive the film pressing plate to move downward so that the film pressing plate will press the thermoplastic film located on the upper surface of the cigarette pack entering the film pressing platform onto the cigarette pack, so as to assist the fusing mechanism to seal the cigarette pack.

9. The buffer-type packing machine for plastic packing of cigarette cartons as claimed in claim 8, characterized in that: The fusing mechanism comprises a connecting frame, a telescopic pressure rod, a lower pressure arm and a heat sealing machine, the heat sealing machine is transversely arranged on the upper end surface at the entrance of the film pressing platform, the connecting frame spans directly above the heat sealing machine, the telescopic pressure rod is vertically arranged at the upper end of the connecting frame, the telescopic end of the telescopic pressure rod faces the heat sealing machine, and slide rails are vertically arranged on the side walls on opposite sides of the connecting frame, and the slide rails are respectively located on both sides of the entrance of the film pressing platform, the lower pressure arm is transversely arranged at the telescopic end of the telescopic pressure rod, the two ends of the lower pressure arm are respectively installed on the slide rails, and the lower pressure arm is opposite to the heat sealing machine, the guide frame and the channel are respectively located on the side of the lower pressure arm and the heat sealing machine facing the conveyor belt, and the telescopic pressure rod can drive the lower pressure arm to slide along the The rail moves up and down to press the thermoplastic film passing through the guide frame and the entrance of the film pressing platform through the channel toward the heat sealing machine through the lower pressing arm, so that the two are welded by the heat sealing machine and connected together. In the process of pressing the thermoplastic film downward, the thermoplastic film passing through the guide frame forms a pulling force on the second guide roller and the first guide roller under the downward pressure of the lower pressing arm, so that the second guide roller and the first guide roller are close to each other to release the thermoplastic film buffered between the second guide roller and the first guide roller, and the thermoplastic film simultaneously forms a pulling force on the film pressing roller, so that the film pressing roller moves upward along the slide groove to release the thermoplastic film hanging between the upper film roll release frame and the first guide roller.

10. The buffer-type packing machine for plastic packing of cigarette cartons as claimed in claim 8, characterized in that: Lateral extrusion mechanisms are also provided on both sides of the film pressing platform, and the lateral extrusion mechanisms respectively include lateral support frames, extrusion arms and extrusion side plates. The lateral support frames are relatively arranged on both sides of the upper end surface of the film pressing platform, and the extrusion arms are relatively arranged on the two support frames and can move telescopically in opposite directions. The extrusion side plates are relatively arranged at the telescopic ends of the extrusion arms, and a packaging channel is formed between the two extrusion side plates. After the pushing device pushes the cigarette pack against the connected thermoplastic film into the packaging channel, the two extrusion arms can synchronously push the two extrusion side plates to perform relative telescopic movements to clamp and fix the two sides of the cigarette pack entering the packaging channel.

Images