CN112319927A - Store up membrane mechanism and send membrane machine - Google Patents

Abstract

The invention relates to a film storage mechanism and a film feeding machine. The device comprises a swinging rod and at least one fixed pulley, wherein the swinging rod is rotatably provided with the at least one swinging pulley, and the fixed pulley is rotatably arranged on a swinging plane of the swinging rod and is positioned on at least one side of the swinging rod; the swinging pulley and the fixed pulley are used for the film to pass around and convey; along with the swing of the swing rod, the distance between the swing pulley and the fixed pulley is increased or decreased, so that the length of the adhesive film between the swing pulley and the fixed pulley is increased or decreased, a certain amount of film can be stored at the swing rod before the adhesive film is adhered to an article, and the phenomena of adhesion and reverse rolling which easily occur in the process that the adhesive film is directly adhered to the article are prevented; meanwhile, the adhesive film has viscosity, so that the speed of separating the adhesive film from the film placing device is low, and the film storing device can store a part of the adhesive film in advance, thereby ensuring that the packaging process keeps certain efficiency.

Description

Store up membrane mechanism and send membrane machine

Technical Field

The invention relates to the field of packaging machinery, in particular to a film storage mechanism and a film feeding machine.

Background

In the field of packaging machines, the device for feeding the packaging film is an important device for determining the efficiency and packaging effectiveness of the packaging machine.

The packaging machines in the prior art are often heat shrink packaging machines, the films used in the heat shrink packaging machines being heat shrink films, which have a low requirement on the tightness of the wrapping. In the process of conveying the film, the film feeding device and a plurality of tension wheels are adopted to match and adjust the tension degree, so that the smooth film feeding process can be realized.

To eliminate the heat-shrinking process, an adhesive film may be used instead of the heat-shrinkable film for packaging. However, when an adhesive film is used, the requirement on the tightness of the package is higher than that when a heat shrinkable film is used, so that the requirement on the accuracy of the amount of the film during film pasting is greatly improved, if the film conveyed by a film roller is too much, the residual amount of the film still exists in the whole packaging machine after film pasting, the tightness of the film is easily reduced, and the adhesive film has viscosity, so that adhesion is easily generated during film conveying, once the adhesion is generated, the film cannot be normally conveyed, even is reversely wound, and the packaging machine needs to be stopped; if too little film is delivered from the film roll, packaging efficiency may be affected; and no device capable of accurately measuring the amount of the used film in real time exists in the prior art.

In addition, the adhesive film is less likely to separate from the film roll and the separation speed is slow compared to the heat shrinkable film, so that the film storage length is sufficient to increase the film release time. The thermal shrinkage film has no viscosity, adhesion cannot be generated in the film feeding process of the film feeding mechanism, and the adhesive films cannot be contacted with each other in the film feeding process; the existing packaging machine can not be suitable for packaging the adhesive film.

Disclosure of Invention

The invention aims to provide a film storage mechanism and a film feeding machine.

The technical scheme for solving the technical problems is as follows: a film storage mechanism comprises a swing rod and at least one fixed pulley, wherein the swing rod can swing on a swing plane of the swing rod; the swing rod is rotatably provided with at least one swing pulley, and the fixed pulley is rotatably arranged on the swing plane of the swing rod and positioned on at least one side of the swing rod; the swinging pulley and the fixed pulley are used for the film to pass around and convey; the distance between the swinging pulley and the fixed pulley is increased or decreased along with the swinging of the swinging rod.

The invention has the beneficial effects that: through the swing of the swing rod, the vertical distance between the swing pulley and the fixed pulley on the swing rod is changed, so that the length of the adhesive film between the swing pulley and the fixed pulley is increased or reduced, a certain film amount can be stored at the swing rod before the adhesive film is adhered to an article, the buffer of film conveying is formed between the film placing device and the article, the film conveying speed is not easy to accurately measure in the process of directly adhering the adhesive film to the article, the length of the required film cannot be timely and accurately conveyed through the film conveying device, and the phenomena of adhesion and reverse winding are easy to occur; meanwhile, the adhesive film has viscosity, so that the speed of separation of the adhesive film from the film placing device is low, the film storing device can store a part of the adhesive film in advance, the stored film is used for packaging the packaged objects in the packaging process of the packaged objects, the film is conveyed to the film storing device continuously to store the film in the packaging process, the film storing device is guaranteed to have enough film amount in the next packaging process, and the packaging process can be guaranteed to keep certain efficiency.

The invention also has the following further technical scheme:

the swing rod is fixed on the swing rod, and the other end of the swing rod is fixed on the fixing device; the film conveyed around the swinging pulley provides tension for the swinging rod, and the adjusting spring provides tension opposite to the tension for the swinging rod.

The beneficial effects of the further technical scheme are as follows: the oscillating lever can be oscillated by the control of the adhesive film and the adjusting spring.

Furthermore, a rotating shaft is arranged in the middle of the swinging rod; the number of the fixed pulleys is multiple, the fixed pulleys are divided into two groups, and the two groups of the fixed pulleys are arranged in a central symmetry mode around the rotating shaft; the swinging pulleys are arranged at intervals along the conveying direction of the swinging rod and are symmetrically arranged around the rotating shaft; at least one fixed pulley is arranged on the upper side or the lower side between two adjacent swing pulleys.

The beneficial effects of the further technical scheme are as follows: the positions of the swing pulleys and the fixed pulleys on the front side and the rear side of the rotating shaft of the swing rod are symmetrical, so that the increasing and reducing amounts of the adhesive films on the front side and the rear side are equal.

Further, the film placing device also comprises a film placing sensor, a film placing device and a controller; the film releasing sensor is parallel to the swinging plane of the swinging rod and senses the swinging of the swinging rod to generate an electric signal; the film releasing sensor and the film releasing device are respectively connected with the controller through circuits, and the controller can receive an electric signal sensed by the film releasing sensor to control the film on the film releasing device to be conveyed to the oscillating rod and the fixed pulley or stop conveying to the oscillating rod.

The beneficial effects of the further technical scheme are as follows: the swinging angle of the film sensor sensing swinging rod is arranged on the swinging rod, and the operation of the film releasing mechanism is controlled by the controller, so that the storage and releasing processes of the film are related, the continuous operation of the film conveying process is ensured, and the film sticking efficiency is improved.

Further, the film placing device comprises a film pulling mechanism, a film roller and a brake mechanism; the film drawing mechanism is provided with a driving motor, the film roller is provided with a brake mechanism, and the controller is in circuit connection with the driving motor and the brake mechanism.

The beneficial effect of adopting the further scheme is that: the brake mechanism can control the rotation and stop of the film roller; the adhesive film on the film roller is conveyed to a position between an upper film drawing mechanism and a lower film drawing mechanism of the film drawing mechanism, and the motor drives one of the film drawing mechanisms to rotate to drive the adhesive film to continue to be conveyed to a fixed pulley or a swinging pulley; meanwhile, the film pulling mechanism and the brake mechanism can further prevent the adhesive film from being rewound.

The film conveying machine comprises two film placing mechanisms and an article placing table, wherein the article placing table is located between the two film placing mechanisms, and films conveyed by the two film placing mechanisms are conveyed to the front part of the article placing table and are connected with each other.

The beneficial effect of adopting the further technical scheme is that: when the article is pasted, the article continues to move forwards to provide tension for the adhesive film, so that the adhesive film can pull the swing rod to swing.

Further, a pushing arm is arranged above the article placing table and stretches back and forth along the article placing table.

The beneficial effect of adopting the further technical scheme is that: the article is pushed to the film in the front of the article placing table by the pushing arm and moves forwards continuously until the film covers the upper and lower surfaces of the article.

The film covering the article and the film not covering the article can be cut off by the sealing and cutting device, and the upper film and the lower film not covering the article are connected at the same time.

The beneficial effect of adopting the further technical scheme is that: the sealing and cutting device can cut off the adhesive film, connect the upper adhesive film and the lower adhesive film and continue to carry out film pasting on the next article.

Further, one of the two film placing mechanisms is a film storing mechanism, and the other one is the auxiliary film placing device; the auxiliary film releasing device comprises an auxiliary film roller and at least one auxiliary roller, and films conveyed on the auxiliary film roller sequentially wind each auxiliary roller to convey the articles.

The film conveying device further comprises an auxiliary film pulling mechanism, and the film conveyed from the auxiliary film roller is conveyed to any one auxiliary roller through the film pulling mechanism.

Drawings

FIG. 1 is a cross-sectional view of a film storage mechanism and a film feeding machine of the present invention before packaging;

FIG. 2 is a cross-sectional view of the film storing mechanism and the film feeding machine during packaging.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a frame 11, an adjusting spring 12 and a belt conveyor; 13. article, 14, adhesive film;

2. a swing rod 21, a film releasing sensor 22, a swing pulley 23 and a rotating shaft;

3. the device comprises a fixed pulley, 4, a film pulling mechanism, 5, a film roller, 6, a brake mechanism, 7, a guide wheel, 8, an article placing table, 9 and a push arm;

10. the auxiliary film roller 101, the auxiliary film pulling mechanism 102, the auxiliary roller 103, the auxiliary brake mechanism 104 and the auxiliary roller swing rod.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.

In the present invention, "forward" refers to a film feeding direction.

As shown in fig. 1 and 2, a film storage mechanism comprises a swing rod 2 and at least one fixed pulley 3, wherein the swing rod 2 is rotatably provided with at least one swing pulley 22, and the fixed pulley 3 is rotatably arranged on a swing plane of the swing rod 2 and is positioned on at least one side of the swing rod 2; the distance between the swing pulley 22 and the fixed pulley 3 is increased or decreased with the swing of the swing lever 2, and the amount of the film to be wound around the fixed pulley 3 and the swing pulley 22 and conveyed is changed; thereby achieving storage of the adhesive film between the oscillating pulley 22 and the fixed pulley 3.

The film storage mechanism further comprises an adjusting spring 11, one end of the adjusting spring 11 is fixed on the swing rod 2, and the other end of the adjusting spring 11 is fixed on the fixing device; the film conveyed to the article by the swing rod 2 provides tension for the swing rod 2, and the adjusting spring 11 provides tension opposite to the tension for the swing rod 2; the oscillating lever is allowed to oscillate under the action of the adhesive film and the adjusting spring 11.

According to the film storage mechanism, the pulling force of the adhesive film on the swing rod 2 is generated by the motion of the article after the adhesive film is attached to the article; the position relation between the article and the swing rod 2 is that the article is positioned in the moving direction of the swing pulley 22 close to the fixed pulley 3; the article continues to move while being pasted with the film so that the adhesive film can pull the swing rod 2 to swing, at the moment, the adjusting spring 11 is stretched, the distance between the swing pulley 22 and the fixed pulley 3 is reduced, the film amount between the swing pulley 22 and the fixed pulley 3 is reduced, and the reduced film amount is the film amount pasted on the article; after the film pasting is finished, the pulling force of the conveyed adhesive film on the swing rod 2 disappears, the adjusting spring 11 rebounds to drive the front end of the swing rod 2 to rotate in the opposite direction, and the swing pulley 22 is far away from the fixed pulley 3, so that the film quantity between the swing pulley and the fixed pulley is increased; the film amount between the swing pulley 22 and the fixed pulley 3 is adjusted through the swing of the swing rod 2, the change value of the film amount of the film storage mechanism is equal to the film amount used for sticking the film on the article in the film coating process, and the problems of adhesion and the like caused by insufficient or excessive film amount when the adhesive film is directly coated are prevented.

The film storage mechanism can be suitable for packaging adhesive films, but the non-adhesive films can also be stored by the film storage mechanism when needed.

In one embodiment of the present invention, the swing lever 2 is provided with a rotation shaft 23 at the middle thereof; the number of the fixed pulleys 3 is multiple, and the fixed pulleys 3 are divided into two groups and are arranged in central symmetry around the rotating shaft 23; the swinging pulleys 22 are multiple, and the swinging pulleys 22 are arranged along the conveying direction of the swinging rod 2 at intervals and are symmetrically arranged about a vertical line where the rotating shaft 23 is positioned; at least one fixed pulley 3 is arranged on the upper side or the lower side between two adjacent swinging pulleys 22; the above preferred structure equalizes the increasing and decreasing lengths of the adhesive film on the front and rear sides of the swing lever 23, thereby making the amount of the adhesive film to be conveyed easier to control and adjust.

In the above embodiment, it is preferable that the rotating shaft 23 and the fixed pulley 3 are fixed to the side wall of the frame 1.

In the above embodiment, it is preferable that there are two adjusting springs 11, the connecting positions of the two adjusting springs 11 and the swing lever 2 are respectively located on both sides of the rotating shaft 23, and the tensioning directions of the two adjusting springs 11 are opposite; the swing of the swing lever 2 is made more stable.

The film storage mechanism of the invention also comprises a film placing sensor 21, a film placing device and a controller which are fixed on the frame 1; the film placing sensor 21 is parallel to the swing plane of the swing lever 2 and senses the swing of the swing lever 21; the film releasing sensor 21 and the film releasing device are respectively in circuit connection with the controller, and the controller can receive an electric signal of the swinging rod 2 sensed by the film releasing sensor 21 and control the film on the film releasing device to be conveyed to the swinging rod 2 according to the electric signal; the swinging of the swinging rod 2 is connected with the film releasing device through the electric connection of the film releasing sensor 21 and the controller to the film releasing device, so that the film releasing process can be controlled through the swinging of the swinging rod 2.

In the above embodiment, preferably, the vertical position of the film placing sensor 21 on the frame 1 can be adjusted according to different required film wrapping speeds; the closer the film releasing sensor 21 is located to the swing rod 2, the shorter the time for which the swing rod 2 is sensed to swing, so that the film releasing device starts to release the film in a shorter time, thereby improving the film releasing efficiency.

The film placing device comprises a film pulling mechanism 4, a film roller 5 and a brake mechanism 6; the film drawing mechanism 4 is provided with a driving motor, the film roller 5 is provided with a brake mechanism 6, and the controller is in circuit connection with the driving motor and the brake mechanism 6; the controller controls the film pulling mechanism 4 to pull the film through the driving motor, and simultaneously opens the film roller 5 through the brake mechanism 6 to rotate, so that the adhesive film on the film roller 5 can be controlled to be conveyed to the oscillating rod 2.

In one embodiment of the invention, the film releasing device is positioned at the rear side of the swinging rod 2; the brake mechanism 6 is sleeved on the shaft of the film roller 5 and is electrically connected with the controller; the film drawing mechanism 4 comprises two film drawing mechanisms which are arranged up and down, wherein a shaft of one film drawing mechanism is connected with a motor, and the motor is electrically connected with a controller; the brake mechanism 6 can control the rotation and stop of the film roller 5; the adhesive film on the film roller 5 is conveyed to a position between an upper film drawing mechanism and a lower film drawing mechanism of the film drawing mechanism 4, and the motor drives one of the film drawing rollers to rotate to drive the adhesive film to be continuously conveyed to a fixed pulley 3 or a swinging pulley 22.

In one embodiment of the invention, a fixed pulley 3 is respectively arranged outside the front end and the rear end of the oscillating rod 2, and the adhesive film is conveyed to the fixed pulley 3 by the film drawing mechanism 4 and then is conveyed to the oscillating pulley 22 on the end part of the oscillating rod 2 on the rear side around the outside of the fixed pulley 3; after being conveyed to the swinging pulley 22 on the end part of the front side of the swinging rod 2, the adhesive film is continuously conveyed to the other fixed pulley 3, bypasses the fixed pulley 3 and is conveyed to an article to be coated; two fixed pulleys 3 of this embodiment can be when the adhesive film is carried to swinging arms 2 and leaves swinging arms 2, play tensioning and fixed effect to the adhesive film, make swinging arms 2 at the swing in-process, the removal of adhesive film can be more stable to further prevent that adhesive film from appearing adhesion scheduling problem.

In the above embodiment, preferably, a tension wheel is further provided between the film pulling mechanism 4 and the fixed pulley 3 adjacent thereto, the adhesive film is conveyed around the tension wheel, and the tension wheel applies a certain tension to the adhesive film; the tension roller can further improve the stability of the adhesive film when the adhesive film is conveyed to the oscillating lever 2.

In the above embodiment, preferably, the upper part or the lower part of the fixed pulley 3, which is located outside the front end of the swing lever 2, is further provided with a guide wheel 7, and the adhesive film passes around the guide wheel 7 and then continues to be conveyed to the article; when the object is located below the swing lever 2, the guide wheel 7 is located below the fixed pulley 3, and when the object is located above the swing lever 2, the guide wheel 7 is located above the fixed pulley 3, so that the position of the adhesive film before being conveyed to the article can be adjusted by the guide wheel 7.

The film conveying machine comprises two film placing mechanisms and an article placing table 8, wherein the article placing table 8 is positioned between the two film placing mechanisms, films conveyed by the two film placing mechanisms are conveyed to the front part of the article placing table 8 and are connected with each other, and at least one film placing mechanism is the film storing mechanism; the article on the article placing table 8 can be attached with an adhesive film after moving to the front end thereof.

According to the film feeding machine, the upper side and the lower side of the article placing table 8 can be provided with the film storage mechanisms, and a certain amount of film storage quantity is arranged on the upper side and the lower side in the packaging process; in actual use, due to different shapes of the articles, the film consumption of the lower sides of some articles is less, so that the film storing mechanism is not needed to be used on the lower side; the auxiliary film placing device adopted at the lower side only has the conventional film conveying function.

In the above embodiment, preferably, the pushing arm 9 is arranged above the article placing table 8, and the belt conveyor 12 is arranged in front of the article placing table 8; the articles are pushed to the adhesive film in the front of the article placing table 8 by the pushing arm 9 and continue to move forward to the belt conveyor 12, so that the upper and lower surfaces of the articles can be covered by the film.

In the above embodiment, it is preferable that the adhesive tape dispenser further includes a sealing and cutting device, the sealing and cutting device is capable of cutting off the adhesive film covered on the article and the adhesive film not covered on the article, and simultaneously connecting the upper and lower adhesive films not covered on the article, and the connected upper and lower adhesive films continue to wait for the next article to be attached.

When the film feeding machine comprises a film storage mechanism and an auxiliary film releasing device, the controller is in circuit connection with the auxiliary film releasing device and controls film conveying on the auxiliary film releasing device according to an electric signal; the auxiliary film placing device comprises an auxiliary film roller 10 and an auxiliary film pulling mechanism 101; an auxiliary brake mechanism 103 is arranged on a shaft of the auxiliary film roller 10, and the auxiliary brake mechanism 103 is electrically connected with the controller; the controller can control the rotation and stop of the auxiliary film roller 10 through the auxiliary brake mechanism 103, thereby controlling the film feeding process and the film feeding amount.

The auxiliary film releasing device also comprises a plurality of auxiliary rollers 102, and the film conveyed on the auxiliary film releasing device is wound around each auxiliary roller 102 in sequence; a plurality of auxiliary rollers 102 are arranged along the film feeding direction and are rotatably mounted on the side wall of the frame 1, and each fixed guide roller 102 tensions the film conveyed around it; one auxiliary roller 102 is rotatably mounted on an auxiliary roller adjusting rod 104, the auxiliary roller adjusting rod 104 is detachably mounted on the side wall of the frame 1, and a plurality of adjusting holes are formed in the auxiliary roller adjusting rod 104, so that the distance between the auxiliary roller 102 mounted at the end of the auxiliary roller adjusting rod and other auxiliary rollers 102 can be changed, and adjustment is achieved.

Because the working process of the film feeding machine of the invention is similar when the film feeding machine comprises one or two film storing mechanisms, the working process is only explained by an embodiment comprising one film storing mechanism:

as shown in fig. 1, before the work is performed, the swing lever 2 is located at an initial position where the vertical distance between the swing pulley 22 and the fixed pulley on the same side as the rotation shaft 23 is the maximum distance. Meanwhile, the brake mechanism 6 locks the shaft of the film roll 5, and the auxiliary brake mechanism 103 locks the shaft of the auxiliary film roll 10, so that the two film rolls stop rotating. The conveying path of the adhesive film 14 is that the adhesive film is conveyed to the film drawing mechanism 4 by the film roller 5, is continuously conveyed to the fixed pulley 3 and the swing pulley 22, and is conveyed to the outside of the swing rod 2; is conveyed to the auxiliary film drawing mechanism 101 by the auxiliary film roll 10, continues to pass through the plurality of auxiliary rollers 102, and is connected with the adhesive film 14 conveyed out by the oscillating lever 2, the length of the adhesive film 14 being positioned at the front of the article placing table 8.

As shown in fig. 2, the film feeding machine is started, the pushing arm 9 pushes the article 13 on the article placing table 8 to move forward, and the article 13 continues to move forward after reaching the adhesive film 14 located in front of the article 13, so that the adhesive film 14 adheres to the front surface and the upper and lower surfaces of the article 13.

The pushing arm 9 continues to push the articles 13 to move forward to the belt conveyor 12, at this time, the adhesive film 14 is subjected to a pulling force to drive the swing rod 2 to swing, along with the swing of the swing rod 2, the vertical distance between the swing pulley 22 and the fixed pulley on the same side of the rotating shaft 23 continuously decreases, and the adhesive film 14 continues to output; the film releasing sensor 21 senses the swing of the swing rod 2 and transmits an electric signal to the controller, and after the controller receives a swing signal of the swing rod 2, the controller controls the driving motor to move and the brake mechanism 6 to release, so that the film roller 5 rotates, the film pulling mechanism 4 starts to pull the film, the adhesive film 14 is conveyed to the swing rod 2, and the supplement to the adhesive film 14 is realized.

In the working process, the controller controls the rotation of the auxiliary film roller 10 through the auxiliary brake mechanism 103; the adhesive film 14 is conveyed to the auxiliary film drawing mechanism 101 from the auxiliary film roller 10 and bypasses a plurality of fixed guide roller wheels 102 to the article 13, so as to realize auxiliary film coating; the distance between the auxiliary roller 102 on the auxiliary roller swing lever 104 and the other auxiliary rollers 102 is changed to serve as a storage function of the adhesive film 14.

After the application, the sealing and cutting device cuts off the adhesive film 14 covered on the article and the adhesive film 14 not covered on the article 13, simultaneously connects the upper and lower adhesive films 14 not covered on the article through high temperature, and the connected upper and lower adhesive films 14 continue to wait for the next article to be applied.

The film feeding machine can realize the storage of the adhesive film in the film sticking process, and the film is put in real time in the film sticking process through the matching of the sensor, the controller and other devices, so that the film sticking process is prevented from being influenced by excessive or insufficient film amount, and the film sticking efficiency is improved.

In the description of the present invention, it should be noted 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 those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific 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, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A film storage mechanism, characterized by comprising a swing lever (2) and at least one fixed pulley (3), wherein the swing lever (2) can swing on a swing plane thereof; at least one swinging pulley (22) is rotatably arranged on the swinging rod (2), and the fixed pulley (3) is rotatably arranged on the swinging plane of the swinging rod (2) and is positioned on at least one side of the swinging rod (2);

the swinging pulley (22) and the fixed pulley (3) are used for the film to pass around and convey;

the distance between the swing pulley (22) and the fixed pulley (3) is increased or decreased along with the swing of the swing rod (2).

2. The film storage mechanism according to claim 1, further comprising an adjusting spring (11), wherein one end of the adjusting spring (11) is fixed on the swing rod (2), and the other end is fixed on a fixing device;

the oscillating lever (2) is provided with a pulling force by a film conveyed around the oscillating pulley (22), and the adjusting spring (11) provides the oscillating lever (2) with a tensioning force opposite to the pulling force.

3. The film storage mechanism according to claim 1, wherein the swing rod (2) is provided with a rotating shaft (23) in the middle;

the number of the fixed pulleys (3) is multiple, the fixed pulleys (3) are divided into two groups, and the two groups of the fixed pulleys (3) are arranged in a central symmetry mode around the rotating shaft (23);

the swinging pulleys (22) are arranged in a plurality, and the swinging pulleys (22) are arranged at intervals along the conveying direction of the swinging rod (2) and are symmetrically arranged around the rotating shaft (23);

at least one fixed pulley (3) is arranged on the upper side or the lower side between two adjacent swing pulleys (22).

4. The film storage mechanism according to any one of claims 1 to 3, further comprising a film releasing sensor (21), a film releasing device and a controller;

the film releasing sensor (21) is parallel to the swinging plane of the swinging rod (2) and senses the swinging of the swinging rod (2) to generate an electric signal;

put membrane sensor (21) and put the membrane device respectively with controller circuit connection, the controller can receive put membrane sensor (21) sense sway the electric signal of swinging arms (2) and according to electric signal control put the membrane on the membrane device to swinging arms (2) with fixed pulley (3) go up to carry or stop carrying to on swinging arms (2).

5. The film storing mechanism according to claim 4, wherein the film placing device comprises a film pulling mechanism (4), a film roller (5) and a brake mechanism (6);

the film on the film roller (5) passes through the film pulling mechanism (4) and then is conveyed to the swinging rod (2) and the fixed pulley (3);

the film drawing mechanism (4) is provided with a driving motor, the shaft of the film roller (5) is provided with a brake mechanism (6), and the controller is connected with the driving motor and the brake mechanism (6) through a circuit.

6. A film feeding machine, comprising two film placing mechanisms and an article placing platform (8), wherein the article placing platform (8) is positioned between the two film placing mechanisms, and films conveyed by the two film placing mechanisms are conveyed to the front part of the article placing platform (8) and are connected with each other, and is characterized in that at least one of the film placing mechanisms is the film storing mechanism according to any one of claims 1-5.

7. The film feeding machine according to claim 6, wherein a pushing arm (9) is arranged on the article placing table (8), and the pushing arm (9) extends and retracts along the front-back direction of the article placing table (8).

8. The film feeder according to claim 6, characterized in that it further comprises a sealing and cutting device located in front of said article placing table (8) and capable of cutting off the film already covering the article and the film not covering the article while connecting the films not covering the article on both sides.

9. The film feeding machine as claimed in claim 6, wherein one of the two film releasing mechanisms is a film storing mechanism, and the other is the auxiliary film releasing device;

the auxiliary film releasing device comprises an auxiliary film roller (10) and at least one auxiliary roller (102), and the film conveyed on the auxiliary film roller (10) sequentially winds each auxiliary roller (102) to convey to an article.

10. The film feeding machine according to claim 9, characterized in that the auxiliary film releasing device further comprises an auxiliary film pulling mechanism (101), and the film conveyed by the auxiliary film roller (10) is conveyed to the auxiliary roller (102) through the film pulling mechanism (101).

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