CN220243785U

CN220243785U - Film collecting and drawing mechanism with variable draw ratio

Info

Publication number: CN220243785U
Application number: CN202321576964.1U
Authority: CN
Inventors: 贡学铖; 秦栋; 慕宗良
Original assignee: Wuxi Lima Chemical Machinery Co ltd
Current assignee: Wuxi Lima Chemical Machinery Co ltd
Priority date: 2023-06-20
Filing date: 2023-06-20
Publication date: 2023-12-26
Anticipated expiration: 2033-06-20

Abstract

The utility model relates to a film collecting and drawing mechanism with a variable draw ratio. The utility model includes a frame; two lifting frames which are connected with the frame in a vertical sliding way and are oppositely arranged: a longitudinal beam slidably connected to each of the lifters in a longitudinal direction; the longitudinal driving assembly is arranged between the longitudinal beam and the lifting frame and used for driving the longitudinal beam to longitudinally reciprocate along the lifting frame; a transverse frame, two of which are connected to the longitudinal beams in a transversely sliding manner; the transverse driving assembly is arranged on the longitudinal beam and is used for driving the two transverse frames to move along the longitudinal direction Liang Xiangxiang or oppositely; the membrane collecting assembly arranged on each transverse frame comprises a clamping cylinder, a membrane collecting wheel and a driven wheel, wherein the membrane collecting wheel is driven by the clamping cylinder and is connected with the transverse frames in a sliding mode, the driven wheel is arranged on one side of the membrane collecting wheel, and the driving directions of the clamping cylinders on the two transverse frames are arranged at an included angle. The utility model avoids the plastic deformation of the barrel film during pulling out, and reduces the cost.

Description

Film collecting and drawing mechanism with variable draw ratio

Technical Field

The utility model relates to the technical field of automatic film sleeving, in particular to a film collecting and pulling mechanism with a variable stretching ratio.

Background

At present, the condition that bagged goods are placed in open air in the feed, chemical industry and other material bag stacking industries is common, and the existing protective measures mainly adopt two modes: wrapping and covering. The project is deeply designed for an automatic film covering machine. The mantle adopts a cold stretching film, can provide 5-6 sides of packages which are soaked by rain and snow, ensures that goods are not affected by weather, and has the function of ultraviolet resistance. In addition, the cold-drawn film has very high puncture resistance, can provide stack protection for the material bag, and can prevent the material bag from being damaged accidentally. The key of the cold stretching film covering technology is that the film on the film frame is successfully conveyed, heat-sealed, cut, opened and film-collected to finally realize stretching stack.

The existing film sleeving machine adopts a film-collecting and film-pulling mechanism with fixed proportion and fixed angle to stretch, so that the cylindrical film is pulled out to deform plastically, the cylindrical film material gradually loses the original design function, potential safety hazards in the aspect of physical properties exist, or the production efficiency is greatly reduced by direct pulling, so that unnecessary economic loss is caused.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a variable stretching ratio film collecting and drawing mechanism which can adjust the stretching ratio of a cylindrical film when a film collecting wheel collects films.

According to the technical scheme of the utility model, the utility model provides a variable stretching ratio film collecting and drawing mechanism, which comprises the following components:

a frame;

two lifting frames which are connected with the frame in a vertical sliding way and are oppositely arranged:

a longitudinal beam slidably connected to each of the lifters in a longitudinal direction;

the longitudinal driving assembly is arranged between the longitudinal beam and the lifting frame and used for driving the longitudinal beam to longitudinally reciprocate along the lifting frame;

a transverse frame, two of which are connected to the longitudinal beams in a transversely sliding manner;

the transverse driving assembly is arranged on the longitudinal beam and is used for driving the two transverse frames to move along the longitudinal direction Liang Xiangxiang or oppositely;

the membrane collecting assembly arranged on each transverse frame comprises a clamping cylinder, a membrane collecting wheel and a driven wheel, wherein the membrane collecting wheel is driven by the clamping cylinder and is connected with the transverse frames in a sliding mode, the driven wheel is arranged on one side of the membrane collecting wheel, and the driving directions of the clamping cylinders on the two transverse frames are arranged at an included angle.

In one embodiment of the utility model, the longitudinal driving assembly comprises a first chain, a second chain, first chain wheels, a first motor, a first shaft connected with the output end of the first motor and a first bearing seat connected with the first shaft, wherein the two rows of chain wheels are respectively and rotatably connected at the transverse ends of the lifting frame, each row of chain wheels comprises a first wheel and a second wheel, the first motor is connected to the lifting frame, the first shaft is connected with one of the two rows of chain wheels, the first chain is respectively connected with the first wheels of the two rows of chain wheels, the two first chain wheels are connected to the longitudinal beam and are arranged at the two longitudinal sides of each row of chain wheels, and the second chain is respectively connected with the two first chain wheels and the second wheel of the two rows of chain wheels.

In one embodiment of the utility model, the first chain is connected with a first chain tightening shaft and a tightening hexagonal prism for adjusting the tightness of the first chain.

In one embodiment of the utility model, two ends of the second chain are respectively connected to two longitudinal ends of the longitudinal beam, and one end of the second chain is connected with a second chain tightening shaft.

In one embodiment of the utility model, the transverse driving assembly comprises a second motor, a second shaft connected with the output end of the second motor and a second shaft connected with the second shaft, wherein the two transverse ends of the longitudinal beam are respectively connected with second chain wheels in a rotating way, the second shaft is connected with one of the second chain wheels, a third chain is connected between the two second chain wheels, and the two transverse frames are respectively connected with the third chain.

In one embodiment of the utility model, the lifting frame is slidingly connected to the frame by a first guide wheel, and the frame is connected with a chain lifting mechanism connected with the lifting frame.

In one embodiment of the utility model, the transverse frame is slidingly connected to the longitudinal beam by a second guide wheel.

In one embodiment of the utility model, the transverse frame is connected with a limiting sheet metal for providing soft limit for the movement of the transverse frame and an anti-collision block for providing mechanical limit.

In one embodiment of the utility model, the membrane collecting assembly further comprises a motor mounting frame connected to the transverse frame in a sliding manner, and a membrane collecting motor connected with the motor mounting frame, wherein the membrane collecting wheel is mounted on the membrane collecting motor through an expansion sleeve, and the clamping cylinder is connected to the transverse frame and the driving end of the clamping cylinder is connected to the motor mounting frame.

In one embodiment of the utility model, the transverse frame is provided with a guide rail, and the motor mounting frame is connected with a sliding block which is in sliding fit with the guide rail.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

according to the film drawing mechanism with the variable draw ratio, the two longitudinal beams can move in opposite directions or opposite directions along the longitudinal direction, and the two transverse frames on each longitudinal beam can move in opposite directions or opposite directions along the transverse direction, so that the transverse and longitudinal lengths (draw ratio) of the cylindrical film can be adjusted when the film is collected by the film collecting wheel, the plastic deformation of the cylindrical film is avoided, the cost is reduced, and the film drawing mechanism has the advantages of being simple in structure, convenient to operate, high in efficiency and the like.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings.

FIG. 1 is a schematic diagram of a front view of a variable stretch ratio film collecting and opening mechanism of the present utility model.

Fig. 2 is a schematic top view of the variable stretch ratio film-collecting and film-opening mechanism of the present utility model.

FIG. 3 is a schematic view of the axial structure of the variable stretch ratio film-collecting and film-opening mechanism of the present utility model.

Fig. 4 is a schematic view of a first axial side structure of the membrane collecting assembly of the present utility model.

FIG. 5 is a schematic view of a second axial side structure of the membrane collecting assembly of the present utility model.

Description of the specification reference numerals:

71. a lifting frame; 711. a first guide wheel; 72. a longitudinal beam; 73. a longitudinal drive assembly; 731. a first chain; 7311. a first chain tensioning shaft; 7312. tensioning the hexagonal prism; 732. a second chain; 7321. a second chain tensioning shaft; 733. a first sprocket; 734. a first motor; 735. a first shaft; 736. a first bearing seat; 737. double row chain wheels; 74. a transverse frame; 741. a second guide wheel; 742. limiting metal plates; 743. an anti-collision block; 744. a guide rail; 75. a lateral drive assembly; 751. a second motor; 752. a second shaft; 753. a second bearing seat; 754. a second sprocket; 755. a third chain; 76. a membrane collecting assembly; 761. a clamping cylinder; 762. a film collecting wheel; 763. driven wheel; 764. a motor mounting rack; 765. a film collecting motor; 766. a sliding block.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.

In the present utility model, if directions (up, down, left, right, front and rear) are described, they are merely for convenience of description of the technical solution of the present utility model, and do not indicate or imply that the technical features must be in a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, "a plurality of" means one or more, and "a plurality of" means two or more, and "greater than", "less than", "exceeding", etc. are understood to not include the present number; "above", "below", "within" and the like are understood to include this number. In the description of the present utility model, the description of "first" and "second" if any is used solely for the purpose of distinguishing between technical features and not necessarily for the purpose of indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the present utility model, unless clearly defined otherwise, terms such as "disposed," "mounted," "connected," and the like should be construed broadly and may be connected directly or indirectly through an intermediate medium, for example; the connecting device can be fixedly connected, detachably connected and integrally formed; can be mechanically connected, electrically connected or capable of communicating with each other; may be a communication between two elements or an interaction between two elements. The specific meaning of the words in the utility model can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.

Referring to fig. 1 to 5, a variable stretch ratio film-collecting and film-pulling mechanism according to the present utility model includes:

a frame;

two lifters 71 which are vertically slidably connected to the frame and are disposed opposite to each other:

a longitudinal beam 72, the longitudinal beam 72 being longitudinally slidably connected to each of the lifters 71;

a longitudinal driving assembly 73 disposed between the longitudinal beam 72 and the lifting frame 71, for driving the longitudinal beam 72 to reciprocate longitudinally along the lifting frame 71;

a transverse frame 74, two of said transverse frames 74 being transversely slidably connected to said longitudinal beams 72;

a transverse driving assembly 75, provided on the longitudinal beam 72, for driving the two transverse frames 74 to move along the longitudinal beam 72 in opposite directions or in opposite directions;

the film collecting assembly 76 arranged on each transverse frame 74 comprises a clamping cylinder 761, a film collecting wheel 762 which is driven by the clamping cylinder 761 and is connected with the transverse frames 74 in a sliding manner, and a driven wheel 763 arranged on one side of the film collecting wheel 762, wherein the driving directions of the clamping cylinders 761 on the two transverse frames 74 are arranged at an included angle.

When the finished film is subjected to stretching stress, the finished film initially exhibits certain elastic characteristics and is in a stretched state, namely instant elastic deformation, and can completely recover the original shape when the stretching is released. The film is continuously stretched and stressed to enable the film to exceed the yield point, so that the film is subjected to plastic deformation after the stretching stress is relieved, the film material gradually loses the original design function until the film material is completely invalid, the safety requirement of the film-covered goods is difficult to ensure, and the potential safety hazard in the aspect of physical properties obviously exists. Therefore, after corresponding parameters of the corresponding film are obtained, the film is pulled more uniformly by setting the stretching ratio and driving the two driving components, the quality of the film is effectively improved, the whole material after film covering is more attractive, and the safe use of film covering goods can be ensured.

Through the arrangement, the two longitudinal beams 72 can move along the longitudinal direction in opposite directions or back to back, and the two transverse frames 74 on each longitudinal beam 72 can move along the transverse direction in opposite directions or back to back, so that the transverse and longitudinal lengths (stretching ratios) of the cylindrical film can be adjusted when the film collecting wheel 762 collects the film, the plastic deformation of the cylindrical film is avoided, the cost is reduced, and the device has the advantages of being simple in structure, convenient to operate, high in efficiency and the like.

Specifically, the longitudinal driving assembly 73 includes a first chain 731, a second chain 732, a first sprocket 733, a first motor 734, a first shaft 735 connected to an output end of the first motor 734, and a first bearing seat 736 connected to the first shaft 735, two rows of sprockets 737 are rotatably connected to two lateral ends of the lifting frame 71, each row of sprockets 737 includes a first wheel and a second wheel, the first motor 734 is connected to the lifting frame 71, the first shaft 735 is connected to one of the two rows of sprockets 737, the first chain 731 is connected to respective first wheels of the two rows of sprockets 737, the two first sprockets 733 are connected to the longitudinal beam 72 and are disposed on two longitudinal sides of each row of sprockets 737, and the second chain 732 is connected to respective second wheels of the two first sprockets 733 and the two rows of sprockets 737.

Specifically, the first chain 731 is connected to a first chain tensioning shaft 7311 and a tensioning hexagonal prism 7312 for adjusting the tension thereof.

Specifically, the two ends of the second chain 732 are respectively connected to the two longitudinal ends of the longitudinal beam 72, and one end thereof is connected to a second chain tightening shaft 7321. The inclination of the longitudinal beam 72 can be adjusted by the second chain tension shaft 7321.

Specifically, the transverse driving assembly 75 includes a second motor 751, a second shaft 752 connected to an output end of the second motor 751, and a second bearing housing 753 connected to the second shaft 752, the two transverse ends of the longitudinal beam 72 are respectively rotatably connected to second sprockets 754, the second shaft 752 is connected to one of the second sprockets 754, a third chain 755 is connected between two of the second sprockets 754, and two of the transverse frames 74 are respectively connected to the third chain 755.

Specifically, the lifting frame 71 is slidably connected to the frame through a first guide wheel 711, and a chain lifting mechanism connected to the lifting frame 71 is connected to the frame. The existing chain lifting mechanism can be adopted, and the chain wheel is driven to rotate through a driving device (usually a motor or a hydraulic power device), so that the chain is driven to lift.

In particular, the transversal frame 74 is slidingly connected to the longitudinal beam 72 by means of a second guiding wheel 741.

Specifically, the transverse frame 74 is connected with a limiting sheet metal 742 for providing a soft limit for the movement of the transverse frame 74 and an anti-collision block 743 for providing a mechanical limit, respectively.

Specifically, the membrane collecting assembly 76 further includes a motor mounting frame 764 slidably connected to the transverse frame 74, a membrane collecting motor 765 connected to the motor mounting frame 764, the membrane collecting wheel 762 is mounted on the membrane collecting motor 765 through an expansion sleeve, the clamping cylinder 761 is connected to the transverse frame 74, and the driving end of the clamping cylinder 761 is connected to the motor mounting frame 764. The driven wheel 763 is connected to the transverse frame 74, and the transverse frame 74 is also connected to a sensing frame, and the sensing frame is provided with a sensor for sensing the position of the material. In some embodiments, the transverse frame 74 is provided with a guide rail 744, and the motor mount 764 is coupled with a slider 766 that is in sliding engagement with the guide rail 744.

In this embodiment, the driving directions of the two clamping cylinders 761 on the transverse frames 74 are perpendicular to each other, forming an included angle of ninety degrees, and the four film collecting wheels 762 on the two transverse frames 74 are arranged in a cross shape. When film is collected, the edge of the cylindrical film is clamped between the film collecting wheel 762 and the driven wheel 763 by driving the clamping cylinder 761, then the film collecting motor 765 drives the film collecting wheel 762 to rotate to start film collection, meanwhile, the plastic film is collected from a cylinder shape and conveyed downwards along the material to be covered, and when the plastic film reaches the heat seal cutting device, the plastic film is thermally synthesized into small bags and is cut. At this time, the bottom of the bag will naturally drop down, the film collecting wheel 762 continues to collect the film, the film is stretched to be rectangular, then the film is properly stretched, the whole is lowered and sleeved on the material, and meanwhile, the film collecting wheel 762 runs reversely, the plastic bag is tightly attached to the material, and thus the process of sleeving the film once is completed.

Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same, and although the present utility model has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present utility model.

Claims

1. A variable draw ratio film collecting and drawing mechanism, comprising:

a frame;

two lifting frames (71) which are connected to the frame in an up-down sliding way and are arranged oppositely:

-a longitudinal beam (72), said longitudinal beam (72) being longitudinally slidably connected to each of said lifting frames (71);

a longitudinal driving assembly (73) arranged between the longitudinal beam (72) and the lifting frame (71) and used for driving the longitudinal beam (72) to longitudinally reciprocate along the lifting frame (71);

-a transversal frame (74), two of said transversal frames (74) being laterally slidingly connected to said longitudinal beam (72);

a transverse driving assembly (75) arranged on the longitudinal beam (72) and used for driving the two transverse frames (74) to move along the longitudinal beam (72) in opposite directions or opposite directions;

the film collecting assembly (76) is arranged on each transverse frame (74) and comprises clamping air cylinders (761), film collecting wheels (762) which are driven by the clamping air cylinders (761) and are connected with the transverse frames (74) in a sliding mode, driven wheels (763) arranged on one sides of the film collecting wheels (762), and the driving directions of the clamping air cylinders (761) on the two transverse frames (74) are arranged in an included angle mode.

2. The film drawing mechanism with variable stretching ratio according to claim 1, wherein the longitudinal driving assembly (73) comprises a first chain (731), a second chain (732), a first sprocket (733), a first motor (734), a first shaft (735) connected with an output end of the first motor (734), and first bearing seats (736) connected with the first shaft (735), two lateral ends of the lifting frame (71) are respectively connected with double-row sprockets (737) in a rotating manner, each double-row sprocket (737) comprises a first wheel and a second wheel, the first motor (734) is connected to the lifting frame (71), the first shaft (735) is connected with one of the double-row sprockets (737), the first chains (733) are respectively connected with respective first wheels of the two double-row sprockets (737), the two first sprockets (733) are connected to the longitudinal beam (72) and are arranged on two longitudinal sides of each double-row sprocket (737), and the second chain (732) is respectively connected with the two first sprocket (737) and the second sprocket (737).

3. The film drawing mechanism for film collection with variable draw ratio according to claim 2, wherein a first chain tightening shaft (7311) and a tightening hexagonal prism (7312) for adjusting the tightness of the first chain (731) are connected to the first chain.

4. The film drawing mechanism of claim 2, wherein two ends of the second chain (732) are respectively connected to two longitudinal ends of the longitudinal beam (72), and one end of the second chain is connected to a second chain tightening shaft (7321).

5. The film drawing mechanism with the variable stretching ratio according to claim 1, wherein the transverse driving assembly (75) comprises a second motor (751), a second shaft (752) connected with an output end of the second motor (751) and a second bearing seat (753) connected with the second shaft (752), the second sprockets (754) are respectively connected to the transverse two ends of the longitudinal beam (72) in a rotating mode, the second shaft (752) is connected with one of the second sprockets (754), a third chain (755) is connected between the two second sprockets (754), and the two transverse frames (74) are respectively connected with the third chain (755).

6. A variable draw ratio film pulling mechanism according to claim 1, characterized in that the lifting frame (71) is slidingly connected to the frame by means of a first guiding wheel (711), the frame being connected to a chain lifting mechanism connected to the lifting frame (71).

7. A variable draw ratio film pulling mechanism as defined in claim 1, wherein the transverse frame (74) is slidably connected to the longitudinal beam (72) by a second guide wheel (741).

8. The variable stretch ratio film drawing mechanism as claimed in claim 1, wherein the transverse frame (74) is connected with a limiting sheet metal (742) for providing soft limit for the movement of the transverse frame (74) and an anti-collision block (743) for providing mechanical limit, respectively.

9. The variable stretch ratio film drawing mechanism of claim 1, wherein the film drawing assembly (76) further comprises a motor mounting bracket (764) slidably connected to the transverse frame (74), a film drawing motor (765) connected to the motor mounting bracket (764), the film drawing wheel (762) is mounted to the film drawing motor (765) through an expansion sleeve, the clamping cylinder (761) is connected to the transverse frame (74) and the driving end thereof is connected to the motor mounting bracket (764).

10. The variable stretch ratio film drawing mechanism as claimed in claim 9, wherein the transverse frame (74) is provided with a guide rail (744), and the motor mounting frame (764) is connected with a slider (766) in sliding fit with the guide rail (744).