阅读说明：本技术 薄膜夹持机构及薄膜输送机构 (Film clamping mechanism and film conveying mechanism ) 是由 陈健 于 2020-05-12 设计创作，主要内容包括：本申请实施例公开了一种薄膜夹持机构及薄膜输送机构。该薄膜夹持机构包括第一安装座、第一导向轴、第二导向轴、第二安装座、复位弹性件和多个夹持组件。第一导向轴和第二导向轴均垂直设置在第一安装座上。第二安装座的一端可滑动地连接在第一导向轴上,第二安装座的另一端可滑动地连接在第二导向轴上。复位弹性件设置在第一安装座与第二安装座之间。夹持组件均包括电磁铁和磁性材料件；电磁铁和磁性材料件可分离地设置在第一安装座与第二安装座之间。该薄膜夹持机构无需气源,执行速度快,结构简洁,成本低廉,维护方便。该薄膜输送机构用性好、结构简洁、成本低廉,可适应不同宽度的薄膜的夹持及输送,提高了设备的适用性,降低了设备的成本。(The embodiment of the application discloses film fixture and film conveying mechanism. The film clamping mechanism comprises a first mounting seat, a first guide shaft, a second mounting seat, a reset elastic piece and a plurality of clamping assemblies. First guiding axle and second guiding axle all set up perpendicularly on first mount pad. One end of the second mounting seat is connected to the first guide shaft in a sliding mode, and the other end of the second mounting seat is connected to the second guide shaft in a sliding mode. The elastic reset piece is arranged between the first mounting seat and the second mounting seat. The clamping assemblies comprise electromagnets and magnetic material pieces; the electromagnet and the magnetic material piece are separably arranged between the first mounting seat and the second mounting seat. The film clamping mechanism does not need an air source, is high in execution speed, simple in structure, low in cost and convenient to maintain. The film conveying mechanism is good in usability, simple in structure and low in cost, can adapt to clamping and conveying of films with different widths, improves the applicability of equipment and reduces the cost of the equipment.)

1. Film fixture, its characterized in that, film fixture includes:

a first mount (100);

the first guide shaft (210) and the second guide shaft (220) are vertically arranged on the first mounting seat (100);

a second mounting seat (300), one end of the second mounting seat (300) is slidably connected to the first guide shaft (210), and the other end of the second mounting seat (300) is slidably connected to the second guide shaft (220);

a return spring (400), the return spring (400) being disposed between the first mounting seat (100) and the second mounting seat (300);

and

a plurality of clamping assemblies (500), each clamping assembly (500) comprising an electromagnet (510) and a piece of magnetic material (520);

the electromagnet (510) and the magnetic material piece (520) are detachably arranged between the first mounting seat (100) and the second mounting seat (300).

2. The film holding mechanism of claim 1, further comprising a first sliding connection structure (600) and a second sliding connection structure (700);

the first sliding connection structural part (600) is arranged at one end of the first mounting seat (100), and a sliding groove (610) is arranged on the first sliding connection structural part (600);

the second sliding connection structural part (700) is arranged at the other end of the first mounting seat (100), and a sliding hole (710) is formed in the second sliding connection structural part (700).

3. The film clamping mechanism of claim 1, wherein the electromagnet (510) in the clamping assembly is disposed on the second mounting base (300); the magnetic material piece (520) in the clamping assembly is arranged on the first mounting seat (100) at a position corresponding to the electromagnet (510).

4. The film clamping mechanism according to claim 3, wherein a magnetic material piece mounting structure is arranged on the first mounting seat (100), and comprises a mounting stepped hole (110) and a receiving groove (120);

the mounting stepped hole (110) is arranged at the upper part of the first mounting seat (100);

the accommodating groove (120) is formed in the lower portion of the first mounting seat (100) and communicated with the mounting stepped hole (110), so that the first mounting seat (100) is vertically penetrated.

5. The film clamping mechanism according to claim 4, wherein the magnetic material piece (520) comprises a clamping block (521) and a mounting protrusion (522) formed on the clamping block (521);

in the connected state, the clamping block (521) is positioned in the accommodating groove (120), and the mounting protrusion (522) is connected in the mounting stepped hole (110) through a connecting bolt;

and a gap is arranged between the magnetic material piece (520) and the magnetic material piece mounting structure, so that the magnetic material piece (520) is connected in the magnetic material piece mounting structure in a vertically floating manner.

6. The thin film clamping mechanism of claim 1, wherein the clamping assembly (500) comprises a permanent magnet (530) and a piece of magnetic material (520);

the permanent magnet (530) and the magnetic material piece (520) are detachably disposed between the first mount (100) and the second mount (300).

7. The film clamping mechanism of claim 1, wherein the clamping assembly (500) comprises a first clamping head (540) and a second clamping head (550);

the upper end of the first clamping head (540) is connected to the lower side of the first mounting seat (100), the lower end of the second clamping head (550) is connected to the upper side of the second mounting seat (300), and the lower end of the first clamping head (540) is separably connected with the upper end of the second clamping head (550) in a bonding or electrostatic adsorption mode.

8. The film conveying mechanism is characterized by comprising at least a first film clamping mechanism (10) and a second film clamping mechanism (20), wherein the first film clamping mechanism (10) and the second film clamping mechanism (20) are the film clamping mechanisms according to one of claims 1 to 7;

the film conveying mechanism further comprises a first sliding shaft (30), a second sliding shaft (40), an upper fork template (50), a lower fork template (60), a first film clamping mechanism driving device, a second film clamping mechanism driving device and a clamping driving device (90);

the first sliding shaft (30) and the second sliding shaft (40) are arranged in parallel at intervals; the two ends of the first film clamping mechanism (10) and the second film clamping mechanism (20) are respectively connected to the first sliding shaft (30) and the second sliding shaft (40) in a sliding manner;

the first film clamping mechanism driving device is in transmission connection with the first film clamping mechanism (10); the second film clamping mechanism driving device is in transmission connection with the second film clamping mechanism (20);

the lower fork template (60) is arranged above the first sliding shaft (30) and the second sliding shaft (40); the upper fork template (50) is arranged above the lower fork template (60) at intervals, so that a film guide gap is formed between the lower fork template (60) and the upper fork template (50);

the clamping driving device (90) is arranged below the front ends of the lower fork template (60) and the upper fork template (50).

9. The film conveying mechanism according to claim 8,

a plurality of first notches (51) are formed in one end, close to the film clamping mechanism, of the upper fork template (50); a second notch (61) is formed in one end, close to the film clamping mechanism, of the lower fork template (60); the first notch (51) and the second notch (61) are aligned up and down;

in the mounted state, the electromagnets (510) in the first film clamping mechanism (10) and the second film clamping mechanism (20) are positioned below the first notch (51) and the second notch (61) which are aligned with each other; the magnetic material pieces (520) in the first film clamping mechanism (10) and the second film clamping mechanism (20) are positioned above the first notch (51) and the second notch (61) which are aligned with each other.

10. The film feeding mechanism according to claim 8 or 9, wherein the clamping driving means (90) is a push plate (92) comprising a telescoping means (91) and disposed at a telescoping end of the telescoping means (91);

or the clamping driving device (90) is a push-pull electromagnet.

Technical Field

The invention relates to the technical field of packaging machines, in particular to a film clamping mechanism and a film conveying mechanism.

Background

The packaging machines of the same type, such as a preservative film packaging machine, a stretch film packaging machine and the like, are commonly used in various occasions, such as fresh food business surpassing, distribution centers and the like. However, the existing packaging machine has the defects of complex structure of the film clamping mechanism, poor applicability, high cost and the like.

Disclosure of Invention

In view of the deficiencies of the prior art, one aspect of the present invention provides a film clamping mechanism.

The film clamping mechanism can comprise a first mounting seat, a first guide shaft, a second mounting seat, a reset elastic piece and a plurality of clamping components.

The first guide shaft and the second guide shaft are both vertically arranged on the first mounting seat. One end of the second mounting seat is connected to the first guide shaft in a sliding mode, and the other end of the second mounting seat is connected to the second guide shaft in a sliding mode. The elastic reset piece is arranged between the first mounting seat and the second mounting seat. Each clamping assembly comprises an electromagnet and a magnetic material piece; the electromagnet and the magnetic material piece are separably arranged between the first mounting seat and the second mounting seat.

According to a preferred embodiment of the present invention, the film holding mechanism further comprises a first sliding connection structure and a second sliding connection structure.

The first sliding connection structural part is arranged at one end of the first mounting seat, and a sliding groove is formed in the first sliding connection structural part. The second sliding connection structural part is arranged at the other end of the first mounting seat, and a sliding hole is formed in the second sliding connection structural part.

According to a preferred embodiment of the present invention, the electromagnet in the clamping assembly is disposed on the second mount. The magnetic material piece in the clamping assembly is arranged on the first mounting seat at a position corresponding to the electromagnet.

According to a preferred embodiment of the present invention, a magnetic material piece mounting structure including a mounting stepped hole and a receiving groove is provided on the first mounting seat.

The mounting stepped hole is arranged at the upper part of the first mounting seat. The accommodating groove is formed in the lower portion of the first mounting seat and communicated with the mounting stepped hole, so that the first mounting seat is communicated up and down.

According to a preferred embodiment of the present invention, the magnetic material member includes a clamp block and a mounting projection formed on the clamp block. In a connected state, the clamping block is located in the accommodating groove, and the mounting protrusion is connected in the mounting stepped hole through a connecting bolt. And a gap is arranged between the magnetic material piece and the magnetic material piece mounting structure, so that the magnetic material piece is connected in the magnetic material piece mounting structure in a vertically floating manner.

According to a preferred embodiment of the invention, the clamping assembly comprises a permanent magnet and a piece of magnetic material; the permanent magnet and the magnetic material piece are separably arranged between the first mounting seat and the second mounting seat.

According to a preferred embodiment of the present invention, the gripping assembly comprises a first gripping head and a second gripping head; the upper end of the first clamping head is connected to the lower side of the first mounting seat, the lower end of the second clamping head is connected to the upper side of the second mounting seat, and the lower end of the first clamping head is separably connected with the upper end of the second clamping head in a bonding or electrostatic adsorption mode.

According to a preferred embodiment of the present invention, the return elastic member is a return spring or a return elastic piece.

According to a preferred embodiment of the invention, the piece of magnetic material is a piece of ferromagnetic material.

Another aspect of the present invention provides a film transport mechanism.

The film conveying mechanism at least comprises a first film clamping mechanism and a second film clamping mechanism, and the first film clamping mechanism and the second film clamping mechanism are the film clamping mechanisms. The film conveying mechanism further comprises a first sliding shaft, a second sliding shaft, an upper fork template, a lower fork template, a first film clamping mechanism driving device, a second film clamping mechanism driving device and a clamping driving device.

The first sliding shaft and the second sliding shaft are arranged in parallel at intervals. The two ends of the first film clamping mechanism and the second film clamping mechanism are connected to the first sliding shaft and the second sliding shaft in a sliding mode respectively. And the first film clamping mechanism driving device is in transmission connection with the first film clamping mechanism. And the second film clamping mechanism driving device is in transmission connection with the second film clamping mechanism. The lower fork template is arranged above the first sliding shaft and the second sliding shaft. The upper fork template is arranged above the lower fork template at intervals, so that a film guide gap is formed between the lower fork template and the upper fork template. The clamping driving device is arranged below the front ends of the lower fork template and the upper fork template.

According to a preferred embodiment of the present invention, a plurality of first notches are provided at an end of the upper fork template adjacent to the film holding mechanism. And a second notch is formed in one end, close to the film clamping mechanism, of the lower fork template. The first notch and the second notch are aligned up and down. In an installation state, the electromagnets in the first film clamping mechanism and the second film clamping mechanism are located below the first notch and the second notch which are aligned with each other. The magnetic material pieces in the first film clamping mechanism and the second film clamping mechanism are positioned above the first notch and the second notch which are aligned with each other.

According to a preferred embodiment of the present invention, the clamping driving device comprises a telescopic device and a push plate arranged at the telescopic end of the telescopic device; or the clamping driving device is a push-pull electromagnet.

Compared with the prior art, the film clamping mechanism and the film conveying mechanism provided by the embodiment of the invention have the following beneficial effects:

the film clamping mechanism provided by the embodiment of the invention has the advantages of no need of an air source, high execution speed, simple structure, low cost and convenience in maintenance.

The film conveying mechanism provided by the embodiment of the invention has the advantages of good usability, simple structure and low cost, can be simultaneously suitable for clamping and conveying films with different widths, improves the applicability of equipment, and reduces the cost of the equipment.

Additional features of the invention will be set forth in part in the description which follows. Additional features of some aspects of the invention will become apparent to those of ordinary skill in the art upon examination of the following description and accompanying drawings or may be learned by the manufacture or operation of the embodiments. The features of the present disclosure may be realized and attained by practice or use of various methods, instrumentalities and combinations of the specific embodiments described below.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention. Like reference symbols in the various drawings indicate like elements. Wherein the content of the first and second substances,

FIG. 1 is a schematic diagram of a film holding mechanism according to some embodiments of the present invention;

FIG. 2 is a front view of a film holding mechanism according to some embodiments of the present invention;

FIG. 3 is a top view of a film holding mechanism according to some embodiments of the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is an enlarged view at C of FIG. 4;

FIGS. 6 and 7 are schematic structural views illustrating the film feeding mechanism in an initial state according to some embodiments of the present invention;

FIG. 8 is a top view of a film delivery mechanism shown in an initial state according to some embodiments of the present invention;

FIG. 9 is an elevation view of a film delivery mechanism shown in an initial state according to some embodiments of the present invention;

FIG. 10 is a side view of a film delivery mechanism shown in an initial state according to some embodiments of the present invention;

FIGS. 11 and 12 are schematic views illustrating the film feeding mechanism according to some embodiments of the present invention in a state of being operated to a first position;

FIG. 13 is a top view of the film delivery mechanism shown in accordance with some embodiments of the present invention operating to a first position;

FIG. 14 is an elevation view of a film transport mechanism shown in accordance with some embodiments of the present invention operating to a first position;

FIGS. 15 and 16 are schematic views illustrating the film feeding mechanism according to some embodiments of the present invention in a state of being operated to a second position;

FIG. 17 is a top view of the film delivery mechanism shown in accordance with some embodiments of the present invention operating to a second position;

FIG. 18 is an elevation view of the film delivery mechanism shown in accordance with some embodiments of the present invention operating to a second position;

FIG. 19 is a schematic structural view of a clamping assembly according to some embodiments of the present invention;

FIG. 20 is a schematic diagram of a clamp assembly according to further embodiments of the present invention;

figure 21 is a schematic diagram of a clamp assembly according to further embodiments of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that if the terms "first", "second", etc. are used in the description and claims of the present invention and in the accompanying drawings, they are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein. Furthermore, if the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present invention, if the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. are referred to, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.

In addition, in the present invention, the terms "mounted," "disposed," "provided," "connected," "sleeved," and the like should be construed broadly if they are referred to. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

One aspect of an embodiment of the invention discloses a film clamping mechanism.

As shown in fig. 1, the film clamping mechanism may include a first mounting seat 100, a first guide shaft 210, a second guide shaft 220, a second mounting seat 300, a return elastic member 400, and a plurality of clamping assemblies 500.

The first mounting seat 100 may have an elongated structure. In one embodiment, as shown in fig. 1-4, the first mounting seat 100 may be a long strip.

The first guide shaft 210 and the second guide shaft 220 are vertically disposed on the first mount 100. For example, as shown in fig. 2 and 4, the first guide shaft 210 and the second guide shaft 220 may be pin shafts respectively disposed at lower portions of left and right ends of the first mounting seat 100, such that the first guide shaft 210 and the second guide shaft 220 are vertically disposed on the first mounting seat 100 in a downwardly protruding manner. In a specific embodiment, the first guide shaft 210 and the second guide shaft 220 may be directly inserted into pin holes of the first mounting seat 100 and fixed by interference fit of the pins with the pin holes. In another specific embodiment, the first guide shaft 210 and the second guide shaft 220 may also be inserted into pin holes of the first mounting seat 100 and fixed by screws or bolts.

The second mount 300 may have an elongated structure. In one embodiment, as shown in fig. 1-4, the second mounting base 300 may be a rectangular tube.

One end of the second mount 300 is slidably coupled to the first guide shaft 210, and the other end of the second mount 300 is slidably coupled to the second guide shaft 220. In a specific embodiment, two through holes are respectively formed at two ends of the second mounting base 300, and the first guide shaft 210 and the second guide shaft 220 are respectively inserted into the through holes at two ends of the second mounting base 300, so that the second mounting base 300 can slide up and down on the first guide shaft 210 and the second guide shaft 220 to be close to or far from the first mounting base 100, and the electromagnet 510 and the magnetic material member 520 can be attracted or separated. Further, a limit bolt may be connected to the lower ends of the first guide shaft 210 and the second guide shaft 220, respectively. The limit bolt may be radially inserted into the first guide shaft 210 and the second guide shaft 220. The limit bolt may also be axially coupled to the first guide shaft 210 and the second guide shaft 220, and the head of the limit bolt is larger than the diameter of the guide shaft, so that a protrusion is formed at the bottom of the guide shaft radially outward. So that the second mounting seat 300 can only slide between the first mounting seat 100 and the stopper bolt, and the second mounting seat 300 can be prevented from falling off the first guide shaft 210 and the second guide shaft 220.

The return spring 400 is disposed between the first and second mounting seats 100 and 300. For example, the return elastic member 400 may be a return spring or a return elastic sheet. In one specific embodiment, as shown in fig. 2 and 4, the return spring 400 is implemented by two springs. Wherein, a spring is sleeved on the first guide shaft 210, the upper end thereof is connected to the first mounting base 100, and the lower end thereof is connected to the second mounting base 300; the other spring is sleeved on the second guide shaft 220, the upper end of the other spring is connected to the first mounting base 100, and the lower end of the other spring is connected to the second mounting base 300. When the second mounting base 300 moves upward or downward from the initial position, the two springs are compressed or extended, thereby forming a restoring force for the second mounting base 300, so that the second mounting base 300 can be restored to the initial position after the external force is released. In addition, the two springs may also prevent the second mount 300 from falling.

In some embodiments, each clamping assembly may include an electromagnet 510 and a piece of magnetic material 520. The electromagnet 510 and the magnetic material 520 are detachably disposed between the first mount 100 and the second mount 300.

For example, as shown in fig. 2 and 4, the electromagnet 510 in the clamping assembly may be disposed on the second mounting base 300. The magnetic material 520 in the clamping assembly may be disposed on the first mount 100 at a position corresponding to the electromagnet 510. Specifically, as shown in fig. 5, a magnetic material member mounting structure including a mounting stepped hole 110 and a receiving groove 120 is provided on the first mounting seat 100. A mounting stepped hole 110 is provided at an upper portion of the first mounting seat 100. The receiving groove 120 is disposed at a lower portion of the first mounting seat 100 and communicates with the mounting stepped hole 110, so that the first mounting seat 100 is penetrated up and down. The magnetic material 520 includes a clamp block 521 and a mounting protrusion 522 formed on the clamp block 521. In the coupled state, the clamping block 521 is located in the receiving groove 120, and the mounting protrusion 522 is coupled in the mounting stepped hole 110 by a coupling bolt (not shown in the drawings). And a gap is provided between the magnetic material piece 520 and the magnetic material piece mounting structure, so that the magnetic material piece 520 is connected in the magnetic material piece mounting structure in a vertically floating manner. The electromagnet 510 may be fixed to the second mount 300 by a bolt or a connection pin. In the installed state, the electromagnet 510 is connected to the control system and power supply of the packaging machine. When the film clamp is used, a film (such as a preservative film) is positioned between the electromagnet 510 and the magnetic material piece 520, and the film is clamped between the electromagnet 510 and the magnetic material piece 520 through attraction of the electromagnet 510 and the magnetic material piece 520 in the clamping assembly. In a particular embodiment, a plurality of clamp assemblies 500 are disposed between the first guide shaft 210 and the second guide shaft 220.

Illustratively, the magnetic material 520 may be a ferromagnetic material. Such as iron, cobalt, nickel, gadolinium, and the like. In one specific embodiment, the magnetic material 520 is made of iron plate or iron block.

In other embodiments, the clamping assembly 500 includes a permanent magnet 530 and a piece of magnetic material 520. The permanent magnet 530 and the magnetic material piece 520 are detachably disposed between the first mount 100 and the second mount 300. That is, in this embodiment, the electromagnet 510 may be replaced by a permanent magnet 530, and the rest of the structure is the same as or similar to that of the above embodiment, as shown in fig. 19. In the using process, under the action of the clamping driving device 90 (such as a push-pull electromagnet), the permanent magnet 530 and the magnetic material piece 520 approach each other, and are finally attracted with each other under the action of magnetic force, so that the film is clamped. After one use, the permanent magnet 530 and the magnetic material 520 can be separated by an external force (e.g., a push-pull electromagnet) and then used next time.

In still other embodiments, the gripping assembly 500 may include a first gripping head 540 and a second gripping head 550. The upper end of the first clamping head 540 is connected to the lower side of the first mounting base 100, the lower end of the second clamping head 550 is connected to the upper side of the second mounting base 300, and the lower end of the first clamping head 540 is separably connected with the upper end of the second clamping head 550 in an adhesion or electrostatic adsorption manner.

For example, as shown in fig. 20, an adhesive layer 560 may be provided at an end of the first clamping head 540 and/or the second clamping head 550. When the film clamping device is used, under the action of the clamping driving device 90 (such as a push-pull type electromagnet), the first clamping head 540 and the second clamping head 550 are close to each other, so that the film is adhered to the first clamping head 540 and/or the second clamping head 550, and finally, the film is detachably connected with each other under the action of the adhesive layer 560, and the film is clamped. After one use, the first clamping head 540 and the second clamping head 550 can be separated by an external force (such as a push-pull electromagnet) and then used next time.

Illustratively, as shown in FIG. 21, the first gripper head 540 and/or the second gripper head 550 may employ an electrostatic chuck. When the film clamping device is used, under the action of the clamping driving device 90 (such as a push-pull type electromagnet), the first clamping head 540 and/or the second clamping head 550 are close to each other, the film is adsorbed on the first clamping head 540 and/or the second clamping head 550 under the electrostatic action, and finally the first clamping head 540 and the second clamping head 550 are adsorbed together, so that the film is clamped. After one use, the first clamping head 540 and the second clamping head 550 can be static-free or the first clamping head 540 and the second clamping head 550 can be separated under the action of external force (such as a push-pull type electromagnet), and then the next use is carried out.

In the clamping assembly 500 adopted in the embodiment of the present application, during the subsequent movement of the film clamping mechanism, the power mechanism (e.g., the clamping driving device 90) does not need to follow the movement to release the film at the designated node. This is a great difference from the traditional pneumatic/hydraulic/electric cylinder approach which requires a pneumatic/hydraulic/electric cylinder to maintain the clamping force to clamp the membrane, which must follow the movement of the subsequent membrane clamping mechanism to release the membrane.

The clamping assembly 500 adopted in the embodiment of the application can release the film at the designated node without following the movement of the power mechanism (such as the clamping driving device 90) because the film is clamped by the magnetic force or the adhesive force, so that the structure of the film clamping mechanism is more simplified, the weight is greatly reduced, the power loss of the film clamping mechanism during the movement is reduced, and the control precision of the film clamping mechanism is improved.

Further, the film holding mechanism further includes a first sliding connection structure 600 and a second sliding connection structure 700.

As shown in fig. 2 and 4, the first sliding connection structure 600 is disposed at one end of the first mounting seat 100, and a sliding groove 610 is disposed on the first sliding connection structure 600. The second sliding connection structure 700 is disposed at the other end of the first mounting seat 100, and a sliding hole 710 is disposed on the second sliding connection structure 700.

In the mounted state, one end of the first mount 100 may be coupled to a slide shaft through the slide groove 610 of the first slide coupling structure 600; one end of the first mounting base 100 can be connected to another sliding shaft through the sliding hole 710 of the second sliding connection structure 700. The film clamping mechanism can drive the film to move on the two sliding shafts through the drive of the film clamping mechanism driving device which is in transmission connection with the film clamping mechanism and is connected to the packaging machine control system and the power supply, so that the film with the required length can be pulled out.

The working process of the film clamping mechanism provided by the embodiment of the invention is as follows:

in a normal operation, the magnetic material 520 is located above, the electromagnet 510 is located below, and one end of the thin film is fed between the magnetic material 520 and the electromagnet 510. A gap is left between the magnetic material piece 520 and the first mounting seat, and the magnetic material piece 520 is always in a position far away from the first mounting seat under the action of gravity (the magnetic material piece 520 is in a natural suspension state). When the clamping driving device 90 in the packaging machine is started, the electromagnet is powered on, the clamping driving device 90 pushes the first mounting seat to drive the electromagnet to ascend and be attached to the magnetic material piece 520, and due to the fact that a gap is reserved between the magnetic material piece 520 and the first mounting seat, the clamping driving device can be used for a buffer space for jacking the magnetic material piece 520, and the attraction surface of the electromagnet is automatically attached to the end face of the magnetic material piece 520 in a flat mode. The electromagnet attracts the magnetic material 520 to clamp the film, and then pulls out the film for a required length, and then the electromagnet is powered off, and the magnetic material 520 and the electromagnet 510 are separated under the action of the reset elastic member 400 to release the film. When in actual packaging, the electromagnet and the magnetic material piece at any position can be released according to the requirement so as to achieve the optimal packaging effect.

The film clamping mechanism provided by the embodiment of the invention has the advantages of no need of an air source, high execution speed, simple structure, low cost and convenience in maintenance.

The existing packaging machines of the same type, such as a preservative film packaging machine, a stretch film packaging machine and the like, are commonly used in the occasions of various fresh food suppliers, distribution centers and the like, and have the problems of multiple packaging sizes, multiple packaging types and high equipment cost. Wherein, film fixture and film conveying mechanism are as the indispensable important component part of the same type equipment for packing, for unified solution these difficult problems, need a suitability good, and the structure is succinct, low cost's film centre gripping and conveying mechanism.

Another aspect of an embodiment of the present invention provides a film conveying mechanism.

As shown in fig. 6 and 7, the film feeding mechanism includes a plurality of film holding mechanisms as described in the above embodiments. For example, the film feeding mechanism may include one, two, three, four or more film holding mechanisms as described in the above embodiments.

Further, the film feeding mechanism may further include a first slide shaft 30, a second slide shaft 40, an upper fork template 50, a lower fork template 60, a first film holding mechanism driving device 70, a second film holding mechanism driving device 80, and a clamp driving device 90.

As shown in fig. 6 and 7, the first slide shaft 30 and the second slide shaft 40 are arranged in parallel at intervals.

In a specific embodiment, the film feeding mechanism may include two film holding mechanisms as described in the above embodiments, namely, the first film holding mechanism 10 and the second film holding mechanism 20.

Wherein, the two ends of the first film clamping mechanism 10 and the second film clamping mechanism 20 are respectively connected on the first sliding shaft 30 and the second sliding shaft 40 in a sliding way. Illustratively, the film gripping mechanism further comprises a first sliding connection structure 600 and a second sliding connection structure 700. As shown in fig. 2 and 4, the first sliding connection structure 600 is disposed at one end of the first mounting seat 100, and a sliding groove 610 is disposed on the first sliding connection structure 600. The second sliding connection structure 700 is disposed at the other end of the first mounting seat 100, and a sliding hole 710 is disposed on the second sliding connection structure 700. In the mounted state, one end of the first mount 100 may be coupled to the first slide shaft 30 through the slide groove 610 of the first slide coupling structure member 600; one end of the first mounting base 100 may be connected to the second sliding shaft 40 through the sliding hole 710 of the second sliding connection structure 700.

A first film clamping mechanism driving device (not shown) is in transmission connection with the first film clamping mechanism 10. The second film holding mechanism driving device (not shown in the figure) is in transmission connection with the second film holding mechanism 20. For example, the first film gripping mechanism driving device and the first film gripping mechanism 10 may be in transmission connection by means of gear transmission, belt transmission, chain transmission, or the like. The second film clamping mechanism driving device and the second film clamping mechanism 20 can be in transmission connection through gear transmission, belt transmission, chain transmission and the like. The first film clamping mechanism driving device and the second film clamping mechanism driving device can be stepping motors. Which may be secured to the mounting bracket 730.

The second sliding connection structure 700, the slide shaft, and the film holding mechanism driving means in the film holding mechanism may be formed as one linear motor means, thereby realizing the movement of the film holding mechanism on the slide shaft under the driving of the film holding mechanism driving means.

As shown in fig. 6 to 18, the lower fork template 60 is disposed above the first slide shaft 30 and the second slide shaft 40. The upper fork template 50 is spaced above the lower fork template 60 such that a film guide gap is formed between the lower fork template 60 and the upper fork template 50. Illustratively, a plurality of first notches 51 are provided in the upper fork template 50 at an end thereof adjacent to the film gripping mechanism. A second notch 61 is provided at an end of the lower fork template 60 near the film holding mechanism. The first notch 51 is aligned above and below the second notch 61. In the mounted state, the electromagnets 510 of the first film holding means 10 and the second film holding means 20 are located below the first notch 51 and the second notch 61 which are aligned with each other. The magnetic material 520 in the first film holding mechanism 10 and the second film holding mechanism 20 is located above the first notch 51 and the second notch 61 which are aligned with each other. When the film guide device is used, a film (such as a preservative film) can penetrate through the film guide gap and reach between the electromagnet and the magnetic material piece 520, and the electromagnet and the magnetic material piece 520 complete clamping.

The clamp driving device 90 is disposed below the front ends of the lower fork template 60 and the upper fork template 50. In one embodiment, there are two clamp actuators 90, as shown in FIG. 10.

Illustratively, in some embodiments, the clamp actuator 90 includes a retractor 91 and a push plate 92 disposed at the retracted end of the retractor 91, as shown in FIG. 10. The telescopic device 91 may be a telescopic cylinder, a hydraulic telescopic cylinder, or an electric telescopic cylinder. In one embodiment, the telescopic device 91 is a telescopic cylinder. In other embodiments, the clamp driving device 90 may also employ a push-pull electromagnet. The push-pull electromagnet pushes the electromagnet of the clamping mechanism upwards until the electromagnet is attracted with the magnetic material piece, and the power is cut off and automatically reset through a spring in the push-pull electromagnet. The push-pull type electromagnet serving as the clamping driving device can adopt the same power source as the electromagnet and the magnetic material piece in the clamping assembly, so that the clamping assembly has the advantages of no need of an air source, high execution speed, simple structure, low cost, convenience in maintenance and the like.

In addition, by adopting the film clamping mechanism of the embodiment, the film can be released at the appointed node without following the movement of the clamping driving device 90, so that the structure of the film clamping mechanism is more simplified, the weight is greatly reduced, the power loss of the film clamping mechanism during the movement is reduced, and the control precision of the film clamping mechanism is improved.

The working process of the film conveying mechanism provided by the embodiment of the invention is as follows:

in the initial state, the positions and states of the respective portions of the film feeding mechanism are as shown in fig. 6 to 10. During operation, a thin film 810 is fed in through a middle narrow slit (gap) of the upper fork diaphragm plate 50 and the lower fork diaphragm plate 60, the upper fork diaphragm plate 50 and the lower fork diaphragm plate 60 are fixed multi-fork thin plates (a plurality of notches 51 and 61 are formed), when the film cutting device is in an initial position, the two sets of film clamping mechanisms of the first film clamping mechanism 10 and the second film clamping mechanism 20 are positioned at fork plate ends (namely front ends) of the upper fork diaphragm plate 50 and the lower fork diaphragm plate 60, the electromagnet 510 and the magnetic material piece 520 are positioned between the fork plates (notches) of the upper fork diaphragm plate 510 and the lower fork diaphragm plate 520, the top surface of the electromagnet 510 has a sufficient safety distance from the thin film, the two sets of film clamping mechanisms are close together and are positioned at the inner side of the film cutting knife 820;

the positions and states of the respective portions of the film feeding mechanism in the clamped and expanded states are shown in fig. 11 to 14. The thin film 810 penetrates through the film guide gap to reach between the electromagnet 510 and the magnetic material piece 520, the clamping driving device 90 is started, the second mounting seat 300 in the second thin film clamping mechanism 20 is jacked up, the electromagnet 510 is attached to the magnetic material piece 520, the thin film 810 is located between the electromagnet 510 and the magnetic material piece 520, the electromagnet 510 in the second thin film clamping mechanism 20 is started and attracted together with the corresponding magnetic material piece 520, meanwhile, the thin film 810 is clamped, and the clamping driving device 90 is closed. The second film clamping mechanism 20 moves forward to drive the film 810 to be conveyed forward to a designated length, meanwhile, the first film clamping mechanism 10 moves forward to the outer side of the film cutting knife 820, then the clamping driving device 90 is started again to jack up the second mounting seat 300 in the first film clamping mechanism 10, so that the electromagnet 510 is attached to the magnetic material piece 520, the film 810 is located between the electromagnet 510 and the magnetic material piece 520, the electromagnet 510 in the first film clamping mechanism 10 is started to be attracted with the corresponding magnetic material piece 520, meanwhile, the film 810 is clamped, and the driving device 90 is clamped. The film cutter 820 cuts off the thin film 820;

the positions and states of the respective portions of the film conveying mechanism in the conveying state are shown in fig. 15 to 18. The second film clamping mechanism 20 and the first film clamping mechanism 10 drive the cut film to be conveyed to a designated position in a flat and non-stretching state, and the motion states of the front film clamping mechanism and the rear film clamping mechanism are controlled by the first film clamping mechanism driving device and the second film clamping mechanism driving device (such as a stepping motor) before reaching the designated position, so that the following states can be realized: 1. before reaching the designated position, the front section accelerates, or the rear section decelerates, or the two states are carried out simultaneously, so that the film can be stretched, and the stretching degree can be adjusted by controlling the stepping motor. 2. After reaching the designated position, the front section retracts backwards, or the rear section advances, or the two sections move towards the center, so that the purpose of reducing the tension of the film is realized, and the reduction degree of the tension can be adjusted by controlling the stepping motor.

The film conveying mechanism provided by the embodiment of the invention has the advantages of good usability, simple structure and low cost, can be simultaneously suitable for clamping and conveying films with different widths, improves the applicability of equipment, and reduces the cost of the equipment.

It should be noted that all of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.

In addition, the above-described embodiments are exemplary, and those skilled in the art, having benefit of this disclosure, will appreciate numerous solutions that are within the scope of the disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.