Stretch wrap packaging machine

Abstract

The application discloses a kind of winding film packaging machines, and technical solution main points are including support conveying mechanism;Winding packaging mechanism, the winding packaging mechanism is used to carry out winding packaging to tire on support conveying mechanism;Film roll temporary storage mechanism, the film roll temporary storage mechanism stores multiple winding film rolls;And transfer mechanism, the transfer mechanism is used to carry out winding film roll transmission between film roll temporary storage mechanism and winding film packaging mechanism;The transfer mechanism includes clamping component, the clamping component can be clamped and relaxed to winding film;And transfer component, the transfer component drives clamping component to slide along vertical direction, parallel with tire transmission direction's horizontal direction and perpendicular to tire transmission direction's horizontal direction;The transmission of packaging film roll between film roll temporary storage mechanism and winding packaging mechanism is carried out by transfer component, without manual replacement of packaging film roll, both save manpower, also improve efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of tire packaging, and more specifically, to a stretch film packaging machine. Background Technology

[0002] Car tires are one of the most important components of a car. They come into direct contact with the road surface and work with the car's suspension to mitigate the impacts that the car experiences while driving. Whether it is a semi-steel tire, an all-steel tire, or a special tire, after the tire is manufactured, it needs to be packaged. During the packaging process, the packaging film is passed through the inner hole of the tire and then wrapped around the tire. The tire is packaged by wrapping it multiple times.

[0003] When packaging tires, most of the work is done using a stretch wrapping machine. The main structure of an existing stretch wrapping machine includes a machine base and a C-frame. When the tire is supported on the machine base, one side of the tire will enter the C-frame due to the opening of the C-frame. Then the C-frame rotates around its own axis, and the rotation of the C-frame drives the packaging film to be continuously wrapped around the tire.

[0004] When using existing stretch wrapping machines, once the wrapping film rolls on the C-frame are used up, they need to be manually replaced, which makes the operation cumbersome, inconvenient, and wastes manpower. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a stretch film packaging machine, which transfers the packaging film roll between the film roll storage mechanism and the stretch packaging mechanism through a transfer component, eliminating the need for manual replacement of the packaging film roll, thus saving manpower and improving efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a stretch film packaging machine, including a support conveying mechanism, wherein the support conveying mechanism is used to support and convey a tire; A wrapping mechanism for wrapping tires on a support conveyor mechanism; A film roll storage mechanism, wherein the film roll storage mechanism stores multiple wound film rolls; And a transfer mechanism, which is used to transfer the winding film roll between the film roll temporary storage mechanism and the winding film packaging mechanism; The transfer mechanism includes a clamping assembly capable of clamping and releasing the wrapping film; And a transfer component, which drives the clamping component to slide in the vertical direction, the horizontal direction parallel to the tire transmission direction, and the horizontal direction perpendicular to the tire transmission direction.

[0007] The present invention is further configured such that: the wrapping mechanism includes a C-shaped frame, the axis of the C-shaped frame is horizontal and arranged along the conveying direction of the tire, and the C-shaped frame rotates around its own axis; A film roll installation mechanism, which is mounted on a C-frame to wrap and package tires as the C-frame rotates; The film roll mounting mechanism includes a mounting column, the axis of which is parallel to the axis of the C-frame. One end of the mounting column is detachably connected to the C-frame. The mounting column has four clearance grooves evenly arranged around its axis. Two clearance grooves are arranged in a group, and the two clearance grooves in the same group are arranged opposite to each other. One group of clearance grooves is set as a positioning clearance groove, and the other group of clearance grooves is set as an installation clearance groove. The device includes two locking blocks, each located at one end of the two positioning clearance slots away from the C-frame. The locking blocks can slide along the radial direction of the mounting column. And elastic elements, each block corresponds to an elastic element, the elastic element can push the corresponding block to slide away from the axis of the mounting column.

[0008] The invention is further configured such that: two sliding grooves are provided at the ends of the two positioning clearance grooves away from the C-shaped frame, the sliding grooves are arranged along the radial direction of the mounting column, and two locking blocks are respectively arranged in the two sliding grooves. The locking blocks can be completely retracted into the sliding grooves by sliding. When the elastic element is in the normal state, the end of the locking block away from the axis of the mounting column extends out of the mounting column to limit the packaging film roll between the locking block and the C-shaped frame.

[0009] The present invention is further configured such that: the end of the card block away from the C-shaped frame is provided with an inclined surface, and the two inclined surfaces of the two card blocks are inclined towards the direction of approaching the C-shaped frame.

[0010] The present invention is further configured such that: the clamping assembly includes a rotating disk, the axis of the rotating disk is parallel to the axis of the mounting post, and the rotating disk is capable of rotating around its own axis; The device includes two mounting rods, which are fixedly connected to the rotating disk on the side near the C-frame. The length of the mounting rods is parallel to the axis of the rotating disk. The two mounting rods are symmetrically arranged with respect to the axis of the rotating disk. The two mounting rods can be inserted into the two clearance slots of the same group at the same time. When the two mounting rods are inserted into the two positioning clearance slots of the same group, they can push the two locking blocks to slide and retract completely into the sliding groove through the action of the inclined surface.

[0011] The invention is further configured such that: an elastic pad is fixedly connected to the side of the mounting rod away from the axis of the rotating disk, so that when the film roll is sleeved outside the two mounting rods, it squeezes the two elastic pads.

[0012] The present invention is further configured such that: the membrane roll temporary storage mechanism includes a telescopic column, the membrane roll is sleeved outside the telescopic column, and the axis of the telescopic column is parallel to the axis of the mounting column; The telescopic column is covered with an annular pad, which is an elastic annular pad. When the membrane roll is placed over the telescopic column, the annular pad is squeezed by the membrane roll. The wrapping mechanism also includes a fixed frame, the C-shaped frame is mounted on the fixed frame, and the telescopic column is also mounted on the fixed frame and located on one side of the C-shaped frame. The fixed frame has a receiving hole that can fully accommodate the telescopic column and the outer annular pad of the telescopic column. An elastic element is provided in the receiving hole. When the elastic element is in its normal state, the telescopic column extends out of the receiving hole. When the elastic element is squeezed, the telescopic column can slide along its own axis to be fully retracted into the receiving hole.

[0013] The present invention is further configured such that: the supporting conveying mechanism includes a plurality of conveying rollers arranged along the tire conveying direction, the axis of the conveying rollers is horizontal and perpendicular to the tire conveying direction, and the axis is vertical when the tire is on the conveying rollers; The discharge end of the supporting conveying mechanism is equipped with a discharge mechanism.

[0014] The present invention is further configured such that: the discharge mechanism includes a support plate, the support plate is horizontally arranged, the support plate is arranged below the discharge end of the support conveying mechanism, and the height difference between the top of the support plate and the top of the transmission roller is at least greater than the radius of the tire; A fixing plate is perpendicular to the sliding direction of the tire on the support conveying mechanism. The fixing plate is fixedly connected to the top of the support plate and located below the discharge end of the support conveying mechanism. A sliding plate, the sliding plate being perpendicular to the sliding direction of the tire on the support conveying mechanism, the sliding plate sliding on the top of the support plate along the transmission direction of the tire on the support conveying mechanism, the sliding plate being driven by a cylinder to slide; And a push plate, the sliding direction of which is horizontal and parallel to the axis of the transfer roller, the push plate being used to push the tire, which is erected on top of the support plate under the action of the sliding plate, to roll to one side of the support plate.

[0015] The present invention is further configured such that the side of the push plate that contacts the tire is arc-shaped and can fit against the side of the tire.

[0016] In summary, the present invention has the following advantages over the prior art: the present invention transfers the packaging film roll between the film roll storage mechanism and the wrapping mechanism through a transfer component, eliminating the need for manual replacement of the packaging film roll, which saves manpower and improves efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the embodiment; Figure 2 for Figure 1 Enlarged schematic diagram of part A; Figure 3 for Figure 2 Enlarged schematic diagram of part B; Figure 4 This is a cross-sectional view illustrating the receiving hole in an embodiment.

[0018] In the diagram: 1. Support conveying mechanism; 2. Winding and packaging mechanism; 21. C-shaped frame; 22. Fixed frame; 221. Receiving hole; 3. Film roll installation mechanism; 31. Mounting column; 311. Clearing groove; 312. Sliding groove; 32. Locking block; 4. Film roll temporary storage mechanism; 41. Telescopic column; 42. Annular pad; 5. Transfer mechanism; 51. Transfer assembly; 511. Sliding frame; 512. Sliding block; 513. Moving disk; 52. Clamping assembly; 521. Rotating disk; 522. Mounting rod; 523. Elastic pad; 6. Fixed rod; 61. Blocking rod; 7. Discharge mechanism; 71. Support plate; 72. Fixed plate; 73. Sliding plate; 74. Push plate. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0020] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0021] Example: A stretch wrapping machine, see attached document. Figure 1 -Appendix Figure 4 The system includes a support conveying mechanism 1, a wrapping and packaging mechanism 2, a film roll storage mechanism 4, and a transfer mechanism 5. The support conveying mechanism 1 is used to support and convey tires; the wrapping and packaging mechanism 2 is used to wrap and package tires on the support conveying mechanism 1; the film roll storage mechanism 4 stores multiple wrapping film rolls; the transfer mechanism 5 is used to transfer the wrapping film rolls between the film roll storage mechanism 4 and the wrapping and packaging mechanism; the transfer mechanism 5 includes a clamping component 52 and a transfer component 51. The clamping component 52 can clamp and release the wrapping film; the transfer component 51 drives the clamping component 52 to slide in the vertical direction, the horizontal direction parallel to the tire transmission direction, and the horizontal direction perpendicular to the tire transmission direction.

[0022] The packaging film roll is transferred between the film roll storage mechanism 4 and the wrapping mechanism 2 by the transfer component 51, eliminating the need for manual replacement of the packaging film roll, which saves manpower and improves efficiency.

[0023] The wrapping mechanism 2 includes a C-frame 21 and a film roll mounting mechanism 3. The C-frame 21 is horizontal and arranged along the tire conveying direction, and rotates around its own axis. The film roll mounting mechanism 3 is mounted on the C-frame 21 to wrap the tire when the C-frame 21 rotates. The film roll mounting mechanism 3 includes mounting posts 31, locking blocks 32, and elastic elements. The axis of the mounting posts 31 is parallel to the axis of the C-frame 21. One end of the mounting posts 31 is detachably connected to the C-frame 21, and four surrounding mounting posts 31 are provided on the outside of the mounting posts 31. 1. Evenly distributed clearance grooves 311 along the axis, two clearance grooves 311 per group, with the two clearance grooves 311 in the same group arranged opposite each other. One group of clearance grooves 311 is set as positioning clearance grooves 311, and the other group of clearance grooves 311 is set as installation clearance grooves 311. Two locking blocks 32 are provided, and the two locking blocks 32 are respectively set at the ends of the two positioning clearance grooves 311 away from the C-shaped frame 21. The locking blocks 32 can slide along the radial direction of the mounting column 31. Each locking block 32 corresponds to an elastic element, and the elastic element can push the corresponding locking block 32 to slide in a direction away from the axis of the mounting column 31. Two positioning clearance grooves 311 are provided with two sliding grooves 312 at the ends away from the C-shaped frame 21. The sliding grooves 312 are arranged along the radial direction of the mounting post 31. Two locking blocks 32 are respectively arranged in the two sliding grooves 312. The locking blocks 32 can be completely retracted into the sliding grooves 312 by sliding. When the elastic element is in the normal state, the end of the locking block 32 away from the axis of the mounting post 31 extends out of the mounting post 31 to limit the packaging film roll between the locking block 32 and the C-shaped frame 21. The end of the locking block 32 away from the C-shaped frame 21 is provided with an inclined surface. The two inclined surfaces of the two locking blocks 32 are inclined towards the direction closer to the C-shaped frame 21.

[0024] By using the elastic element, when installing the membrane roll, the end of the membrane roll away from the C-frame 21 is pushed onto the outside of the mounting post 31. When the membrane roll is just placed on the mounting post 31, it can contact the inclined surface of the locking block 32. Under the action of the inclined surface, the locking block 32 is completely retracted into the relief groove 311 and the sliding groove 312, so that the membrane roll can be placed on the outside of the mounting post 31. When the end of the membrane roll away from the C-frame 21 is aligned with the side of the locking block 32 near the C-frame 21, under the action of the elastic element, the locking block 32 slides in a direction away from the axis of the mounting post 31, and the locking block 32 prevents the membrane roll from detaching from the mounting post 31.

[0025] Specifically, the elastic element is set as a spring.

[0026] Specifically, the clamping assembly 52 includes a rotating disk 521 and mounting rods 522. The axis of the rotating disk 521 is parallel to the axis of the mounting column 31, and the rotating disk 521 can rotate around its own axis. There are two mounting rods 522, which are fixedly connected to the side of the rotating disk 521 near the C-shaped frame 21. The length direction of the mounting rods 522 is parallel to the axis of the rotating disk 521. The two mounting rods 522 are symmetrically arranged with respect to the axis of the rotating disk 521. The two mounting rods 522 can be inserted into the two relief slots 311 of the same group at the same time. When the two mounting rods 522 are inserted into the two positioning relief slots 311 of the same group, they can push the two locking blocks 32 to slide and completely retract into the sliding grooves 312 through the action of the inclined plane.

[0027] During membrane roll installation, two mounting rods 522 grasp the membrane roll from the membrane roll storage mechanism 4. At this time, the membrane roll is sleeved on the two mounting rods 522. Through the sliding and rotation of the rotating disk 521, the two mounting rods 522 are aligned with the two installation clearance slots 311 respectively. Then, the rotating disk 521 slides towards the C-shaped frame 21, so that the two mounting rods 522 are inserted into the two installation clearance slots 311 respectively. During this process, the end of the membrane roll near the C-shaped frame 21 pushes the locking block 32 to retract into the clearance slot 311 and the sliding groove 312 by the action of the inclined surface on the locking block 32, until the end of the membrane roll away from the C-shaped frame 21 is aligned with the locking block 32. At this time, the locking block 32 slides away from the axis of the mounting column 31, preventing the membrane roll from detaching from the mounting column 31. Then, the rotating disk 521 slides away from the C-shaped frame 21, so that the mounting rods 522 are detached from the installation clearance slots 311, thus realizing the installation of the membrane roll.

[0028] Specifically, an elastic pad 523 is fixedly connected to the side of the mounting rod 522 away from the axis of the rotating disk 521. When the film roll is sleeved outside the two mounting rods 522, it squeezes the two elastic pads 523.

[0029] Since most film rolls consist of a cylinder and a packaging film wrapped around the cylinder, after the packaging film on the mounting post 31 is used up, only the cylinder remains on the mounting post 31. At this time, by sliding and rotating the rotating disk 521, the two mounting rods 522 are aligned with the two positioning relief slots 311 respectively. Then, the rotating disk 521 slides towards the C-shaped frame 21, so that the two mounting rods 522 are inserted into the two positioning relief slots 311 respectively. During the process of the mounting rods 522 being inserted into the positioning relief slots 311, the mounting rods 522 and the inclined surface on the locking block 32 can push the locking block 32 to fully retract into the sliding groove 312. After the mounting rods 522 are inserted into the positioning relief slots 311, the rotating disk 521 slides away from the C-shaped frame 21. Due to the loss of the blocking of the locking block 32 and the friction between the elastic pad 523 and the cylinder, the cylinder follows the mounting rods 522 and detaches from the mounting post 31.

[0030] Specifically, the wrapping mechanism 2 also includes a fixed frame 22, on which the C-shaped frame 21 is mounted. The C-shaped frame 21 and the rotating disk 521 are both located on the same side of the fixed frame 22. A fixed rod 6 with its length direction parallel to the axis of the C-shaped frame 21 is fixedly connected to the side of the fixed frame 22 where the rotating disk 521 is mounted. A horizontally positioned blocking rod 61 with its length direction perpendicular to the length direction of the fixed rod 6 is fixedly connected to the side of the fixed rod 6 away from the C-shaped frame 21. In order to detach the cylinder from the two mounting rods 522, the rotating disk 521 slides, causing the cylinder to move to the side where the blocking rod 61 is close to the fixed frame 22. Then, the rotating disk 521 slides away from the fixed frame 22, and the blocking rod 61 blocks the cylinder, causing the cylinder to detach from the two mounting rods 522. After detachment, the cylinder falls under its own weight.

[0031] Specifically, the membrane roll temporary storage mechanism 4 includes a telescopic column 41, on which the membrane roll is sleeved. The axis of the telescopic column 41 is parallel to the axis of the mounting column 31. An annular pad 42 is sleeved on the telescopic column 41. The annular pad 42 is an elastic annular pad. When the membrane roll is sleeved on the telescopic column 41, the annular pad 42 is compressed by the membrane roll. The telescopic column 41 is also mounted on the fixing frame 22 and located on one side of the C-shaped frame 21. The fixing frame 22 has a receiving hole 221 that can completely accommodate the telescopic column 41 and the annular pad 42 outside the telescopic column 41. An elastic element is provided in the receiving hole 221. When the elastic element is in its normal state, the telescopic column 41 extends out of the receiving hole 221. When the elastic element is compressed, the telescopic column 41 can slide along its own axis to be completely stored in the receiving hole 221.

[0032] Specifically, the transfer assembly 51 includes a sliding frame 511 and a sliding block 512. The sliding frame 511 is disposed on the top of the fixed frame 22 and slides horizontally on the top of the fixed frame 22 in a direction perpendicular to the axis of the C-shaped frame 21. The sliding block 512 slides on the sliding frame 511 in a direction parallel to the axis of the C-shaped frame 21. The sliding of the sliding frame 511 on the fixed frame 22 and the sliding of the sliding block 512 on the sliding frame 511 are both achieved by the cooperation of a lead screw and a lead nut. A cylinder is fixedly connected to the bottom of the sliding block 512. The axis of the piston rod of the cylinder is vertical. A movable disk 513 is fixedly connected to the bottom of the piston rod of the cylinder. A rotating disk 521 is rotatably connected to the movable disk 513. A motor that drives the rotating disk 521 to rotate is fixedly connected to the movable disk 513.

[0033] Specifically, the support conveying mechanism 1 includes multiple conveying rollers arranged along the tire conveying direction. The axis of the conveying rollers is horizontal and perpendicular to the tire conveying direction, and the axis is vertical when the tire is on the conveying rollers. The discharge end of the support conveying mechanism 1 is provided with a discharge mechanism 7.

[0034] The discharge mechanism 7 includes a support plate 71, a fixed plate 72, a sliding plate 73, and a pusher plate 74. The support plate 71 is horizontally arranged and positioned below the discharge end of the support conveying mechanism 1. The height difference between the top of the support plate 71 and the top of the transmission roller is at least greater than the radius of the tire. The fixed plate 72 is perpendicular to the sliding direction of the tire on the support conveying mechanism 1 and is fixedly connected to the top of the support plate 71 and located below the discharge end of the support conveying mechanism 1. The sliding plate 73 is perpendicular to the sliding direction of the tire on the support conveying mechanism 1 and slides on the top of the support plate 71 along the transmission direction of the tire on the support conveying mechanism 1. The sliding plate 73 is driven by a cylinder to slide. The sliding direction of the pusher plate 74 is horizontal and parallel to the axial direction of the transmission roller. The pusher plate 74 is used to push the tire, which is upright on the top of the support plate 71 under the action of the sliding plate 73, to roll to one side of the support plate 71.

[0035] A transfer cart for receiving vertical tires is provided on the side of the support plate 71 away from the push plate 74. The axis of the vertical tire is horizontal. When the tire is sent out from the discharge end of the support conveyor 1, the front side of the tire falls down first and is supported on the top of the support plate 71. When the tire is completely detached from the support conveyor 1, the rear side of the tire rests on the fixed plate 72, making the tire tilted. At this time, the sliding plate 73 slides towards the fixed plate 72. Through the action of the sliding plate 73, the tire is straightened from the tilted state, so that the tire is kept vertical. Then the push plate 74 pushes the tire to roll towards the transfer cart and onto the transfer cart.

[0036] Specifically, the side of the push plate 74 that contacts the tire is set to be arc-shaped and can fit against the side of the tire.

[0037] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A stretch wrapping machine, characterized in that: Includes a support conveying mechanism (1) for supporting and conveying the tire; A wrapping mechanism (2) is used to wrap tires on a support conveying mechanism (1); A film roll storage mechanism (4) stores multiple wound film rolls; and a transfer mechanism (5) for transferring the wound film roll between the film roll storage mechanism (4) and the winding and packaging mechanism; The transfer mechanism (5) includes a clamping assembly (52) capable of clamping and releasing the wrapping film; And a transfer assembly (51), which drives the clamping assembly (52) to slide in the vertical direction, in the horizontal direction parallel to the tire transmission direction, and in the horizontal direction perpendicular to the tire transmission direction; The wrapping mechanism (2) includes a C-frame (21), the axis of which is horizontal and arranged along the conveying direction of the tire, and the C-frame (21) rotates around its own axis. A film roll installation mechanism (3) is provided on a C-frame (21) to wrap and package the tire when the C-frame (21) rotates; The film roll mounting mechanism (3) includes a mounting column (31), the axis of which is parallel to the axis of the C-frame (21). One end of the mounting column (31) is detachably connected to the C-frame (21). The mounting column (31) has four clearance grooves (311) evenly arranged around the axis of the mounting column (31). Two clearance grooves (311) are grouped together, and the two clearance grooves (311) in the same group are arranged opposite to each other. One group of clearance grooves (311) is set as a positioning clearance groove (311), and the other group of clearance grooves (311) is set as an installation clearance groove (311). Two locking blocks (32) are provided, and the two locking blocks (32) are respectively located at the ends of the two positioning relief grooves (311) away from the C-shaped frame (21). The locking blocks (32) can slide along the radial direction of the mounting column (31). And elastic elements, each locking block (32) corresponds to an elastic element, and the elastic element can push the corresponding locking block (32) to slide away from the axis of the mounting post (31); Two positioning clearance grooves (311) are provided with two sliding grooves (312) at the end away from the C-shaped frame (21). The sliding grooves (312) are arranged along the radial direction of the mounting post (31). Two locking blocks (32) are respectively arranged in the two sliding grooves (312). The locking blocks (32) can be completely retracted into the sliding grooves (312) by sliding. When the elastic element is in the normal state, the end of the locking block (32) away from the axis of the mounting post (31) extends out of the mounting post (31) to limit the packaging film roll between the locking block (32) and the C-shaped frame (21). The end of the card block (32) away from the C-shaped frame (21) is provided with an inclined surface, and the two inclined surfaces of the two card blocks (32) are inclined towards the C-shaped frame (21) on the side that is far away from each other; The clamping assembly (52) includes a rotating disk (521) whose axis is parallel to the axis of the mounting post (31), and the rotating disk (521) is capable of rotating around its own axis. And mounting rods (522), there are two mounting rods (522), the two mounting rods (522) are fixedly connected to the side of the rotating disk (521) near the C-shaped frame (21), the length direction of the mounting rods (522) is parallel to the axis of the rotating disk (521), the two mounting rods (522) are symmetrically arranged with respect to the axis of the rotating disk (521), the two mounting rods (522) can be inserted into the two relief grooves (311) of the same group at the same time. When the two mounting rods (522) are inserted into the two positioning relief grooves (311) of the same group, the two locking blocks (32) can be pushed to slide and completely retract into the sliding groove (312) by the action of the inclined surface; An elastic pad (523) is fixedly connected to the side of the mounting rod (522) away from the axis of the rotating disk (521). When the film roll is sleeved outside the two mounting rods (522), it will squeeze the two elastic pads (523). The membrane roll temporary storage mechanism (4) includes a telescopic column (41), the membrane roll is sleeved on the telescopic column (41), and the axis of the telescopic column (41) is parallel to the axis of the mounting column (31); The telescopic column (41) is covered with an annular pad (42), which is configured as an elastic annular pad (42). When the membrane roll is sleeved on the telescopic column (41), the annular pad (42) is squeezed by the membrane roll. The wrapping mechanism (2) also includes a fixed frame (22), the C-shaped frame (21) is set on the fixed frame (22), the telescopic column (41) is also set on the fixed frame (22) and located on one side of the C-shaped frame (21), the fixed frame (22) is provided with a receiving hole (221) that can fully accommodate the telescopic column (41) and the outer annular pad (42) of the telescopic column (41), and an elastic element is provided in the receiving hole (221). When the elastic element is in the normal state, the telescopic column (41) extends out of the receiving hole (221). When the elastic element is squeezed, the telescopic column (41) can slide along its own axis to be fully retracted into the receiving hole (221).

2. The stretch wrapping machine according to claim 1, characterized in that: The support conveying mechanism (1) includes multiple conveying rollers arranged along the tire conveying direction. The axis of the conveying rollers is horizontal and perpendicular to the tire conveying direction, and the axis is vertical when the tire is on the conveying rollers. The discharge end of the supporting conveying mechanism (1) is provided with a discharge mechanism (7).

3. The stretch wrapping machine according to claim 2, characterized in that: The discharge mechanism (7) includes a support plate (71), which is horizontally arranged and located below the discharge end of the support conveying mechanism (1). The height difference between the top of the support plate (71) and the top of the transmission roller is at least greater than the radius of the tire. A fixing plate (72) is perpendicular to the sliding direction of the tire on the support conveying mechanism (1). The fixing plate (72) is fixedly connected to the top of the support plate (71) and located below the discharge end of the support conveying mechanism (1). A sliding plate (73) is perpendicular to the sliding direction of the tire on the support conveying mechanism (1). The sliding plate (73) slides on the top of the support plate (71) along the transmission direction of the tire on the support conveying mechanism (1). The sliding plate (73) is driven by a cylinder to slide. And a push plate (74), the sliding direction of which is horizontal and parallel to the axis of the transfer roller, the push plate (74) is used to push the tire that is erected on the top of the support plate (71) under the action of the sliding plate (73) to roll to one side of the support plate (71).

4. The stretch wrapping machine according to claim 3, characterized in that: The push plate (74) is curved on the side that contacts the tire and can fit against the tire sidewall.

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