CN117963254A - Winding film clamping device and automatic packaging machine - Google Patents

Abstract

The invention relates to the field of gypsum boards, in particular to a film winding and clamping device and an automatic packaging machine, wherein the film winding and clamping device comprises at least two first film rollers and at least two second film rollers, the roller shafts of the first film rollers are parallel to each other, a winding film can sequentially bypass each first film roller, and the rotating speeds of the first film rollers are sequentially increased along the conveying direction of the winding film and are used for conveying and stretching the winding film; at least one of the second film rolls is capable of moving from a first position to a second position through the plane of the roll shafts of the two adjacent first film rolls; when the second film roller is located the second position, the roller of second film roller is parallel with the roller of first film roller, and second film roller and first film roller interval cross arrangement, winding film can follow the first film roller of interval cross arrangement, the roll face that the relative of second film roller deviates from and winds in proper order, and the device trades membrane fast and safety, can keep invariable tension when making winding film winding goods, has improved winding packaging quality.

Description

Winding film clamping device and automatic packaging machine

Technical Field

The invention relates to the technical field of gypsum board production and packaging, in particular to a winding film clamping device and an automatic packaging machine.

Background

In industrial production, the automatic packaging machine is used for packaging goods instead of manual packaging, so that the direction of social development is changed. The stretching winding film is a packaging mode which is used for tightly wrapping cargoes and is convenient to transport and store by utilizing deformation stress generated by forcibly stretching the film by a mechanical stretching device or manually at normal temperature. The adhesive has the characteristics of good tensile property, tear resistance, strong penetration resistance, high transparency, good self-adhesion, high retraction rate, tight package, no loosening and the like.

The winding film is also applied to the field of gypsum board production, and the winding film is wrapped on the outer surface of the produced gypsum board, so that the gypsum board can be prevented from being damaged in the process of carrying, and the effects of dust prevention, moisture prevention and cleaning are achieved.

The wrapping film is stretched to package goods when in use, and the stretching mode is direct stretching and pre-stretching. The prestretching is to pull out one end of the coiled winding film and wind the winding film on each film roller, and generally, manual winding film is mainly adopted, so that the problem that the winding film is inconvenient to penetrate between each film roller can exist. The smoothness of the wound film can also greatly influence the winding packaging effect, and the film winding unevenness easily causes film winding and film breakage.

Disclosure of Invention

The invention provides a winding film clamping device and an automatic packaging machine, which are used for solving the problems that film winding, film breaking and film inserting are easy to occur when winding films in the prior art.

In one aspect, the present invention provides a wound film clamping device comprising:

The first film rollers are at least two, the roller shafts of the first film rollers are parallel to each other, the winding film can sequentially bypass each first film roller, and the rotating speeds of the first film rollers are sequentially increased along the conveying direction of the winding film and are used for conveying and stretching the winding film;

The second film roll is provided with a first position and a second position, and the roll shafts of the second film roll can pass through the planes of the roll shafts of the two adjacent first film rolls to move from the first position to the second position;

when the second film roller is located at the second position, the roller shaft of the second film roller is parallel to the roller shaft of the first film roller, the second film roller and the first film roller are alternately arranged in a crossing mode, and the winding film can sequentially bypass the roller surfaces of the first film roller and the second film roller which are alternately arranged and are opposite and deviating from each other.

In some embodiments, the wound film clamping device further comprises:

the first film rolls are rotatably arranged on the first supporting seat, and the roll shafts of the first film rolls are positioned on the same plane;

And each second film roller is rotatably arranged on the second supporting seat, the roller shafts of the second film rollers are positioned on the same plane, and the second supporting seat can rotate or linearly move relative to the first supporting seat so as to enable the second film rollers to be switched between the first position and the second position.

In some of the embodiments of the present invention,

One side of the second supporting seat is rotationally connected with the first supporting seat, and the second supporting seat can rotate relative to the first supporting seat, so that the second film roller can be switched between a first position and a second position.

In some embodiments, the second support base includes:

One side of the movable plate is rotationally connected with the first supporting seat;

the connecting arms are respectively arranged on two opposite sides of the movable plate and are perpendicular to the movable plate, and each second film roller is respectively and correspondingly arranged between the two connecting arms which are oppositely arranged.

In some embodiments, the wound film clamping device further comprises a limiting mechanism, the limiting mechanism comprising:

the first locking part is arranged on the other opposite side of the second supporting seat;

The second locking part is arranged on the first supporting seat and can be matched with the first locking part after the second film roller reaches the second position, so that the second supporting seat and the first supporting seat are prevented from rotating relatively.

In some embodiments, the wound film clamping device further comprises a tensioning mechanism comprising:

The tensioning roller and the tensioning assembly can be used for winding the wound film which is wound out of the first film roller or the second film roller at the end of conveying, and when the tensioning roller receives the lateral pressure of the stretched wound film which is wound out of the first film roller or the second film roller at the end of conveying, the tensioning roller can overcome the elasticity of the tensioning assembly and move along the preset direction;

The displacement sensor is connected with the driving mechanism of the first film rollers, and can send out signals to the driving mechanism when the tensioning roller moves to a preset position along a preset direction, so that each first film roller synchronously rotates.

In some embodiments, the wound film clamping device further comprises:

the guide roller can sequentially bypass the roller surfaces of the tensioning roller and the guide roller by winding films which are wound out from the first film roller or the second film roller positioned at the tail conveying position;

the preset direction is perpendicular to the plane where the roll shaft of the guide roll and the roll shaft of the first film roll or the second film roll positioned at the tail conveying position are positioned;

When the tensioning roller reaches a preset position, a winding film between the first film roller or the second film roller at the last conveying position and the guide roller is in a plane.

In some embodiments, the tensioning assembly comprises:

the guide part is arranged on the first supporting seat and provided with a guide groove, and the body length direction of the guide groove is consistent with the preset direction;

The moving part is in sliding fit with the inner wall of the guide groove, and the rotating shaft of the tensioning roller is rotationally connected with the moving part;

And one end of the tensioning spring is connected with the moving part, the other end of the tensioning spring is connected with the inner wall of the guide groove opposite to the moving part, and the tensioning spring has compression elasticity which can resist the lateral pressure of the winding film to the tensioning roller.

In some embodiments, the roll surface of each first film roll is coated with a damping layer.

On the other hand, the invention also provides an automatic packaging machine, which comprises the winding film clamping device provided by any specific embodiment.

The beneficial effects of the invention are as follows:

1. According to the winding film clamping device, the first film roller and the second film roller are arranged, and the second film roller can pass through the planes of the roller shafts of the two adjacent first film rollers to move from the first position to the second position; when the second film roller is positioned at the first position, a larger gap is formed between the first film roller and the second film roller, so that the winding film can pass through the gap between the first film roller and the second film roller along a straight line manually; when the second film roller is positioned at the second position, the roller shafts of the second film roller are parallel to the roller shafts of the two adjacent first film rollers, and the second film roller and the first film roller are alternately arranged in a crossing way; in the process that the second film roller reaches the second position from the first position, the winding film originally positioned between the first film roller and the second film roller sequentially bypasses the opposite and deviating roller surfaces of the first film roller and the second film roller which are alternately arranged, so that the winding film is smoothly and uniformly wound on the first film roller and the second film roller, and the wound winding film has high surface evenness, so that the times of film winding and film breakage can be reduced, and the appearance quality of winding package is improved. And in the film winding process of the winding film, the winding film is not required to be manually pulled to repeatedly penetrate in a narrow gap between film rollers, the hidden danger of clamping in the original penetrating film mode is eliminated, the whole film winding process is completed at a very high speed, and each film changing operation can be more convenient and quicker, so that the film changing operation time is effectively saved, and the packaging production efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a wound film clamping apparatus according to an embodiment of the present invention;

FIG. 2 is another schematic view of a wound film clamping apparatus according to an embodiment of the present invention;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a top view of FIG. 2;

FIG. 5 is another top view of FIG. 2;

FIG. 6 is a schematic structural view of a tensioning assembly;

FIG. 7 is a schematic diagram of a limiting mechanism.

Reference numerals:

100-first film roll, 200-second film roll, 300-first supporting seat, 400-second supporting seat, 410-movable plate, 420-connecting arm, 500-stop mechanism, 510-first locking part, 520-second locking part, 600-tensioning mechanism, 610-tensioning roll, 620-tensioning assembly, 621-guiding part, 6211-guiding groove, 622-moving part, 623-tensioning spring, 630-displacement sensor, 700-guiding roll, 800-winding film.

Detailed Description

The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

When the wrapping film is used, goods can be packed by stretching, before pre-stretching, one end of the coiled wrapping film is pulled out and wound on each film roller manually, and the film rollers are started to rotate for pre-stretching. Wherein the manual work is around the membrane in-process, and the winding membrane alternates very inconvenient between the membrane roller repeatedly on the one hand, and on the other hand adopts the manual work to wind the membrane, can not guarantee the roughness of winding membrane on the membrane roller, consequently can appear local pine when the membrane is wound, local tight, winding membrane surface unevenness's phenomenon, after the membrane roller begins to rotate, the winding membrane just appears breaking membrane more easily in the relatively tighter position, and the winding membrane just leads to the membrane roll more easily of relatively looser position, can cause very big influence to winding packaging effect.

In order to improve the above-mentioned problems, as shown in fig. 1-7, the present embodiment provides a film winding device for a wound film 800, which includes at least two first film rollers 100 and second film rollers 200, wherein the rollers of the first film rollers 100 are parallel to each other, the wound film 800 can sequentially bypass each first film roller 100, and the rotation speed of the first film rollers 100 sequentially increases along the conveying direction of the wound film 800, so as to convey and stretch the wound film 800. At least one second film roll 200, the second film roll 200 has a first position and a second position, and the roll shafts of the second film roll 200 can pass through the planes of the roll shafts of the adjacent two first film rolls 100 to move from the first position to the second position. When the second film roll 200 is located at the second position, the roll axis of the second film roll 200 is parallel to the roll axis of the first film roll 100, and the second film roll 200 and the first film roll 100 are alternately arranged at intervals, and the wound film 800 can sequentially bypass the opposite and deviating roll surfaces of the first film roll 100 and the second film roll 200 which are alternately arranged.

By adopting the technical solution in the above embodiment, by providing the first film roll 100 and the second film roll 200, the second film roll 200 has the first position and the second position, as shown in fig. 1 and 3, when the second film roll 200 is located at the first position, a larger gap exists between the second film roll 200 and the first film roll 100, and at this time, the end of the wound film 800 can be pulled to directly pass through the gap between the first film roll 100 and the second film roll 200 along a straight line; as shown in fig. 2 and 4, when the second film roll 200 is located at the second position, the roll shafts of the second film roll 200 are parallel to the roll shafts of the adjacent two first film rolls 100, and the second film roll 200 is arranged alternately and crosswise with the first film rolls 100; in the process of the second film roll 200 from the first position to the second position, the second film roll 200 can pass through the planes of the roll shafts of the adjacent two first film rolls 100, and meanwhile, the winding film 800 positioned in the gap between the first film roll 100 and the second film roll 200 is automatically wound on the first film roll 100 and the second film roll 200 and sequentially wound on the opposite and deviating roll surfaces of the first film roll 100 and the second film roll 200 which are alternately arranged in a crossing manner; in the film winding process, the winding film 800 does not need to be manually pulled to repeatedly penetrate in a narrow gap between film rollers, so that the hidden trouble of clamping in the original film penetrating mode is eliminated. Meanwhile, in the film winding process, the winding film 800 is wound on the first film roller 100 and the second film roller 200 from contacting the first film roller 100 and the second film roller 200 to being completely stretched, only a few seconds are needed, the film winding time is very short, and each film changing operation can be more convenient and quicker, so that the film changing operation time is effectively saved, and the packaging production efficiency is improved. Because the whole film winding time is short, and the winding films 800 at all positions almost simultaneously contact or press the roller surfaces of the first film roller 100 or the second film roller 200, the winding films 800 at all positions can be well and evenly wound on the roller surfaces of the first film roller 100 and the second film roller 200, and the number of times of film winding and film breaking in the packaging process can be reduced due to high surface evenness of the wound winding films 800, so that the appearance quality of winding packages is improved.

It should be noted that, the position shown in fig. 1 only shows one of the first positions of the second film roll 200, and in other embodiments, the first position of the second film roll 200 may be other positions, for example, when in the second position, the second film roll 200 is parallel or perpendicular to the first film roll 100, so long as it is ensured that when the second film roll 200 is in the first position, a large gap is provided between the first film roll 100 and the second film roll 200, the wound film 800 may be allowed to pass through the gap along a straight line, and it is ensured that the second film roll 200 can smoothly reach the second position from the first position.

It should be noted that, each first film roll 100 is connected to a rotary driver through a transmission mechanism, the rotary driver can drive each first film roll 100 to rotate, the rotary driver can use a servo motor or a stepping motor, etc., the transmission mechanism can use a gear-rack engaged transmission or a belt pulley transmission, and the rotation speed difference between different first film rolls 100 can be realized by adjusting the engaged transmission ratio of gears or belt pulleys. After the adjustment, the rotational speed of each first film roll 100 is sequentially increased along the conveying direction of the wound film 800, and the rotational speed of the first film roll 100 in the front conveying position is made to be greater than the rotational speed of the first film roll 100 in the rear conveying position, so that the wound film 800 between the two first film rolls 100 is stretched during the conveying process.

Specifically, the number of the first film rolls 100 may be at least two, but may be three, four, or the like in other embodiments, and preferably two in this embodiment. At least one second film roll 200, and in other embodiments, two, three, etc. second film rolls 200 are also possible, and in this embodiment, three second film rolls 200 are preferable, and as shown in fig. 3, the three second film rolls 100 are alternately arranged in a crossing manner. When the second film rolls 200 are located at the first position, the wound film 800 may pass straight from right to left in the gaps between the three second film rolls 200 and the two first film rolls 100. As shown in fig. 4, when the second film roll 200 reaches the second position, the three second film rolls 200 are alternately arranged with the two first film rolls 100 at intervals, and the wound film 800 is wound around the upper roll surfaces of the second film rolls 200 and the lower roll surfaces of the first film rolls 100 from right to left, respectively.

As shown in fig. 1 and 2, in the technical solution of this embodiment, the film winding device 800 further includes a first support base 300 and a second support base 400, where each first film roll 100 is rotatably installed on the first support base 300, and the roll shafts of the first film rolls 100 are located on the same plane. Each second film roll 200 is rotatably mounted on the second supporting seat 400, the roll shafts of the second film rolls 200 are located on the same plane, and the second supporting seat 400 can rotate or linearly move relative to the first supporting seat 300 to enable the second film roll 200 to switch between the first position and the second position. Specifically, the first support base 300 includes an upper support base and a lower support base that are oppositely disposed, the first film roll 100 is disposed between the upper support base and the lower support base and is perpendicular to the upper support base and the lower support base, the upper end of the roll shaft of the first film roll 100 is rotationally connected with the upper support base through a bearing, the lower end of the roll shaft of the first film roll 100 is rotationally connected with the upper end surface of the lower support base through a bearing, the radius of each first film roll 100 is equal, and the roll shafts of the first film rolls 100 are located on the same plane, so that the first film rolls 100 are arranged along a straight line. Similarly, two ends of the roller shafts of the second film rollers 200 are rotatably mounted on the second supporting seat 400 through bearings, the radius of each second film roller 200 is equal, the roller shafts of each second film roller 200 are located on the same plane, so that each second film roller 200 is arranged along a straight line, the second film rollers 200 are alternately arranged with the first film rollers 100 at intervals, the second supporting seat 400 can rotate or linearly move relative to the first supporting seat 300, and the second film rollers 200 pass through the planes of the roller shafts of the two adjacent first film rollers 100, so that the second film rollers 200 can be switched between the first positions and the second positions.

As shown in fig. 1 and 3, in the technical solution of the present embodiment, one side of the second support base 400 is rotatably connected with the first support base 300, and the second support base 400 can rotate relative to the first support base 300, and thus the second film roll 200 is switched between the first position and the second position. Specifically, one side of the second support base 400 is rotatably connected to the first support base 300 through a rotation shaft, and the second film roll 200 on the second support base 400 can be driven to switch between the first position and the second position by rotating the second support base 400 relative to the first support base 300. The second film roll 200 is switched between the first position and the second position by enabling the second support base 400 and the first support base 300 to rotate, the force required by rotation is small, the operation is labor-saving, the moving track of the second film roll 200 can be accurately controlled, and meanwhile, after the second support base 400 and the first support base 300 are integrally assembled, the equipment is small in size and high in integration level.

As shown in fig. 1 and 2, in the technical solution of the present embodiment, the second support base 400 includes a movable plate 410 and a connecting arm 420, where one side of the movable plate 410 is rotationally connected with the first support base 300 through a rotating shaft, at least two connecting arms 420 are respectively disposed on two opposite sides of the movable plate 410 and perpendicular to the movable plate 410, and each second film roll 200 is correspondingly rotationally installed between the two connecting arms 420 disposed oppositely through bearings.

It should be noted that, the length of the connecting arm 420 is greater than the vertical distance from the roller shafts of the first film roller 100 to the movable plate 410, the second film roller 200 is mounted at one end of the connecting arm 420 close to the first film roller 100, where the roller shafts of the second film rollers 200 are located, parallel to the movable plate 410, so as to ensure that when the second film roller 200 is located from the first position to the second position, the roller shafts of the second film roller 200 can pass through the planes of the roller shafts of the adjacent two first film rollers 100 to reach the side of the first film roller 100 far away from the movable plate 410, so as to ensure that the wrapping film 800 has a larger wrap angle on the first film roller 100 and the second film roller 200, thereby increasing the contact area between the wrapping film 800 and the first film roller 100 and the second film roller 200, fully increasing the friction force between the wrapping film 800 and the first film roller 100 and the second film roller 200, and improving the stretching effect of the wrapping film 800.

As a preferred embodiment, the second film roll 200 has a smaller diameter than the first film roll 100, which is advantageous in that: when the distance between two adjacent first film rolls 100 is kept narrow (the second film roll 200 can be allowed to pass through), after the roll shaft of the second film roll 200 passes through the plane where the roll shafts of the two adjacent first film rolls 100 are located and reaches the side, far away from the movable plate 410, of the first film roll 100, the wrapping film 800 can have a large enough wrapping area on the first film roll 100 and the second film roll 200, so that the contact area between the wrapping film 800 and the first film roll 100 and the contact area between the wrapping film 800 and the second film roll 200 are increased, the friction force between the wrapping film 800 and the first film roll 100 and the second film roll 200 are increased sufficiently, and the stretching effect of the wrapping film 800 is improved.

As shown in fig. 7, the film winding device 800 further includes a limiting mechanism 500, where the limiting mechanism 500 includes a first locking portion 510 and a second locking portion 520, where the first locking portion 510 is disposed on the opposite side of the second support base 400, and the second locking portion 520 is disposed on the first support base 300, and can cooperate with the first locking portion 510 after the second film roll 200 reaches the second position, so as to prevent the second support base 400 and the first support base 300 from rotating relatively. The first locking portion 510 and the second locking portion 520 may have a pin hole structure, a slider chute structure, or the like, as long as the locking function is achieved. Preferably, the first locking portion 510 is a limiting sliding block, the second locking portion 520 is a limiting sliding groove formed in the second supporting seat 400, the first supporting seat 300 is provided with a limiting hole, when the second film roll 200 reaches the second position, the limiting hole and the limiting sliding groove vertically correspond, and at this time, the limiting sliding block can pass through the limiting hole to reach the limiting groove, thereby preventing the second supporting seat 400 and the first supporting seat 300 from rotating relatively.

As shown in fig. 3 and 4, in the solution of the present embodiment, the film winding device 800 further includes a tensioning mechanism 600, where the tensioning mechanism 600 includes a tensioning roller 610, a tensioning assembly 620, and a displacement sensor 630, the wound film 800 wound from the first film roller 100 or the second film roller 200 located at the end of conveyance can be wound from the tensioning roller 610, and when the tensioning roller 610 receives the lateral pressure of the stretched wound film 800 wound from the first film roller 100 or the second film roller 200 located at the end of conveyance, the tension roller 610 can overcome the elastic force of the tensioning assembly 620 and move in a preset direction. The displacement sensor 630 is connected to the driving mechanism of the first film roll 100, and the displacement sensor 630 can send a signal to the driving mechanism when the tension roller 610 moves to a preset position along a preset direction, so that each first film roll 100 rotates synchronously.

As shown in fig. 3 and 4, specifically, in the present embodiment, the second film roll 200 at the far left in the drawing is located at the last position of conveyance, the tension roll 610 is located at the output direction of the second film roll 200 at the far left, the stretched wound film 800 wound from the second film roll 200 at the far left can be wound from the tension roll 610, and when the tension roll 610 receives the lateral pressure of the wound film 800, the tension roll 610 can overcome the elastic force of the tension assembly 620 and move in the preset direction. When the wrapping film 800 is loose, the lateral pressure of the tensioning roller 610 from the wrapping film 800 is smaller than the elastic force of the tensioning assembly 620, and the tensioning roller 610 does not move; when the wrapping film 800 is gradually tightened as the cargo is wrapped, the lateral pressure of the tension roller 610 from the wrapping film 800 is gradually increased and gradually greater than the elastic force of the tension assembly 620, and at this time, the tension roller 610 overcomes the elastic force of the tension assembly 620 and moves in a preset direction. Until the tension roller 610 moves to the preset position, the displacement sensor 630 senses that the tension roller 610 reaches the preset position and sends a signal to the driving mechanism, so that each first film roller 100 rotates synchronously, and each first film roller 100 continues to convey and stretch the wrapping film 800. Thereby can guarantee that wrapping film 800 receives abundant stretching when packing winding goods, and make the goods winding more compact, guarantee the better effect of wrapping the membrane.

Specifically, in the present embodiment, the displacement sensors 630 are two and are respectively disposed on the upper support base and the lower support base. Each first film roll 100 can be connected with the same driving mechanism through a gear engagement mechanism or a belt pulley engagement mechanism respectively so as to ensure that each first film roll 100 is started and stopped synchronously. The driving mechanism may be a stepping motor or a servo motor. The output end of the displacement sensor is connected with the controller, the output end of the controller is connected with the driving mechanism, whether the tensioning roller 610 moves to a preset position is judged through the displacement sensor 630, if the tensioning roller 610 does not move to the preset position, the displacement sensor 630 does not send out a command, if the tensioning roller 610 moves to the preset position, the displacement sensor 630 sends out a signal to the controller, after receiving the signal of the displacement sensor 630, the controller sends out a command to the driving mechanism, so that each first film roller 100 synchronously rotates, and each first film roller 100 immediately stretches and conveys the winding film 800.

As shown in fig. 3 and 4, the film winding device 800 further includes a guide roller 700, and the wound film 800 wound from the first film roller 100 or the second film roller 200 at the end of the conveyance can be sequentially wound from the roller surface of the tension roller 610 and the guide roller 700; the preset direction is perpendicular to the plane where the roller shaft of the guide roller 700 and the roller shaft of the first film roller 100 or the second film roller 200 located at the last position of conveyance are located; when the tension roller 610 reaches the preset position, the wound film 800 between the first film roller 100 or the second film roller 200 positioned at the last position of conveyance and the guide roller 700 is in a plane.

When the moving direction of the tension roller 610 is not preset, the moving path of the tension roller 610 is actually an irregular curve when the wound film 800 is gradually tightened, and it is difficult to control at the time of design. Therefore, the preferred preset direction in this embodiment is the extending direction of the broken line in fig. 5, that is, the plane perpendicular to the plane where the roll axis of the guide roll 700 and the roll axis of the leftmost second film roll 200 are located, and since the straight line between the two points is shortest, in the process of gradually tightening the wound film 800, the wound film 800 will gradually tend to be straight from the original broken line, and the moving direction in this moving process is substantially consistent with the extending direction of the broken line in fig. 5. When the tensioning roller 610 reaches the preset position, the winding film 800 between the second film roller 200 and the guide roller 700 at the leftmost position of the conveying end is in a plane, the winding film 800 is fully stretched, and has larger tension, so that the winding film 800 can be tightly wound when the wound goods are packaged, and the better winding film effect is ensured.

As shown in fig. 3 and 4, in the technical solution of the present embodiment, the tensioning assembly 620 includes a guiding portion 621, a moving portion 622 and a tensioning spring 623, where the guiding portion 621 is disposed on the first supporting seat 300, the guiding portion 621 is provided with a guiding groove 6211, and a body length direction of the guiding groove 6211 is consistent with a preset direction; the moving part 622 is in sliding fit with the inner wall of the guide groove 6211, and the rotating shaft of the tensioning roller 610 is rotationally connected with the moving part 622; the tension spring 623 has one end connected to the moving portion 622 and the other end connected to an inner wall of the guide groove 6211 opposite to the moving portion 622, and the tension spring 623 has a compression elastic force capable of opposing a side pressure of the wrapping film 800 against the tension roller 610.

Specifically, the guiding groove 6211 is a rectangular elongated groove, two opposite sides of the moving part 622 are slidably connected with the inner wall of the guiding groove 6211, the moving part 622 can move in the guiding groove 6211, a bearing seat is arranged on the moving part 622, the rotating shaft of the tensioning roller 610 is rotatably mounted on the bearing seat, when the tensioning roller 610 receives the pressure measurement of the winding film 800, the moving part 622 is driven to move in the guiding groove 6211, and when the moving part 622 slides from one end to the other end of the guiding groove 6211, the tensioning roller 610 reaches a preset position.

In the technical solution of this embodiment, the roller surface of each first film roller 100 is coated with a damping layer, so that the friction between the first film roller 100 and the wound film 800 can be increased, which is beneficial to conveying the wound film 800.

In another aspect, the present invention further provides an automatic packaging machine, which includes the film clamping device of the winding film 800 provided in any of the specific embodiments above. This automatic packaging machine can realize quick trade membrane to winding membrane 800 is in the packaging process, and tension stable output can not appear one section pine, one section tight phenomenon, reduces the phenomenon of broken membrane, membrane book, and the goods winding packaging is effectual, can avoid goods sharp-pointed portion to puncture winding membrane 800.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (10)

1. A wound film clamping device, comprising:

The first film rolls are parallel to each other, the winding film can sequentially bypass each first film roll, and the rotating speeds of the first film rolls are sequentially increased along the conveying direction of the winding film and are used for conveying and stretching the winding film;

The second film roll is provided with a first position and a second position, and the roll shafts of the second film roll can pass through the planes of the roll shafts of two adjacent first film rolls to move from the first position to the second position;

When the second film roller is located at the second position, the roller shaft of the second film roller is parallel to the roller shaft of the first film roller, the second film roller is alternately arranged with the first film roller at intervals, and the winding film can sequentially bypass the roller surfaces of the first film roller and the second film roller which are alternately arranged and oppositely deviate from each other.

2. The wound film sandwiching apparatus of claim 1, further comprising:

the first film rolls are rotatably arranged on the first supporting seat, and the roll shafts of the first film rolls are positioned on the same plane;

The second film rolls are rotatably arranged on the second supporting seats, the roll shafts of the second film rolls are located on the same plane, and the second supporting seats can rotate or linearly move relative to the first supporting seats so that the second film rolls can be switched between a first position and a second position.

3. The wound film clamping device of claim 2, wherein:

one side of the second supporting seat is rotationally connected with the first supporting seat, and the second supporting seat can rotate relative to the first supporting seat, so that the second film roller can be switched between a first position and a second position.

4. A wound film clamping device according to claim 3, wherein the second support base comprises:

The movable plate, one side of the said movable plate is connected with said first supporting seat rotatably;

the two connecting arms are respectively arranged on two opposite sides of the movable plate and are perpendicular to the movable plate, and each second film roller is correspondingly and rotatably arranged between the two connecting arms which are oppositely arranged.

5. A wound film clamping device as claimed in claim 3, further comprising a limiting mechanism comprising:

the first locking part is arranged on the other opposite side of the second supporting seat;

the second locking part is arranged on the first supporting seat, and can be mutually matched with the first locking part after the second film roller reaches a second position, so that the second supporting seat and the first supporting seat are prevented from rotating relatively.

6. The wound film clamping device of any of claims 1-5, further comprising a tensioning mechanism comprising:

the tensioning roller and the tensioning assembly are used for enabling the wound film which is wound out of the first film roller or the second film roller at the tail conveying position to be wound around the tensioning roller, and when the tensioning roller receives side pressure of the stretched wound film which is wound out of the first film roller or the second film roller at the tail conveying position, the tensioning roller can overcome the elasticity of the tensioning assembly and move in a preset direction;

The displacement sensor is connected with the driving mechanism of the first film roller, and the displacement sensor can send a signal to the driving mechanism when the tensioning roller moves to a preset position along a preset direction, so that each first film roller synchronously rotates.

7. The wound film clamping device of claim 6, further comprising:

the guide roller can sequentially bypass the tensioning roller and the roller surface of the guide roller from the winding film wound out of the first film roller or the second film roller positioned at the tail conveying position;

The preset direction is perpendicular to the plane where the roll shaft of the guide roll and the roll shaft of the first film roll or the second film roll positioned at the tail conveying position are positioned;

When the tensioning roller reaches the preset position, the winding film between the first film roller or the second film roller at the last conveying position and the guide roller is in a plane.

8. The wound film clamping device of claim 6, wherein the tensioning assembly comprises:

The guide part is arranged on the first supporting seat and provided with a guide groove, and the body length direction of the guide groove is consistent with the preset direction;

the moving part is in sliding fit with the inner wall of the guide groove, and the rotating shaft of the tensioning roller is rotationally connected with the moving part;

And one end of the tensioning spring is connected with the moving part, the other end of the tensioning spring is connected with the inner wall of the guide groove opposite to the moving part, and the tensioning spring has compression elastic force capable of opposing to the lateral pressure of the winding film to the tensioning roller.

9. The wound film clamping device of claim 1, wherein: and damping layers are coated on the roller surfaces of the first film rollers.

10. An automatic packaging machine comprising the wound film sandwiching device of any one of claims 1 to 9.