阅读说明：本技术 一种塑料膜张力调节装置及调节方法 (Plastic film tension adjusting device and adjusting method ) 是由 胡勇强 于 2021-07-13 设计创作，主要内容包括：本发明公开了一种塑料膜张力调节装置及调节方法,包括设置在两个输送辊之间的张紧机构,张紧机构包括第一张紧辊和第二张紧辊,塑料膜贴紧第一张紧辊上部及贴紧第二张紧辊的下部进行输送,第一张紧辊和底座之间构造有间隙调节机构,第一张紧辊上设置有高度调节机构,第二张紧辊上设置有微调节机构,数控控制单元分别与间隙调节机构、高度调节机构及微调节机构电连接,通过数控控制单元控制张紧机构对塑料膜张力的调节,多方位对塑料膜的张力进行调节,保证了塑料膜输送过程中的稳定性,张力调节效果好,能自动对塑料膜进行张紧,提高了输送效率,不影响塑料膜的输送和收卷及质量,本发明适应于塑料膜加工技术领域。(The invention discloses a plastic film tension adjusting device and an adjusting method, which comprises a tensioning mechanism arranged between two conveying rollers, wherein the tensioning mechanism comprises a first tensioning roller and a second tensioning roller, a plastic film is tightly attached to the upper part of the first tensioning roller and tightly attached to the lower part of the second tensioning roller for conveying, a gap adjusting mechanism is formed between the first tensioning roller and a base, a height adjusting mechanism is arranged on the first tensioning roller, a fine adjusting mechanism is arranged on the second tensioning roller, a numerical control unit is respectively and electrically connected with the gap adjusting mechanism, the height adjusting mechanism and the fine adjusting mechanism, the tensioning mechanism is controlled by the numerical control unit to adjust the tension of the plastic film, the tension of the plastic film is adjusted in multiple directions, the stability of the plastic film in the conveying process is ensured, the tension adjusting effect is good, the plastic film can be automatically tensioned, the conveying efficiency is improved, and the conveying, winding and quality of the plastic film are not influenced, the invention is suitable for the technical field of plastic film processing.)

1. A plastic film tension adjusting device is characterized in that: the device comprises a tensioning mechanism arranged between two conveying rollers, wherein the tensioning mechanism comprises a first tensioning roller and a second tensioning roller, the first tensioning roller is arranged on a base in parallel at two ends of a conveying direction of a plastic film, the second tensioning roller is arranged on the base and is positioned between the two first tensioning rollers, the axes of the first tensioning roller, the second tensioning roller and the conveying rollers are parallel, the two conveying rollers are symmetrically arranged about the axis of the second tensioning roller, a gap adjusting mechanism electrically connected with a numerical control unit is constructed between the first tensioning roller and the base, a height adjusting mechanism used for vertically adjusting the height of the first tensioning roller and electrically connected with the numerical control unit is arranged on the first tensioning roller, the numerical control unit is arranged on the base, and controls the gap adjusting mechanism to enable the two first tensioning rollers to be far away from or close to each other, with constituting to two the regulation in clearance between the first tensioning roller, numerical control unit control first tensioning roller is along vertical removal to constitute the regulation to first tensioning roller height, be provided with on the second tensioning roller be used for finely tune the tensioning and with the fine adjustment mechanism that the numerical control unit electricity is connected to the plastic film, the plastic film paste tightly in first tensioning roller upper portion and paste tightly in the second tensioning roller lower part is carried.

2. The plastic film tension adjusting apparatus as claimed in claim 1, wherein: the fine adjustment mechanism comprises four fixed seats fixedly connected on the base, every two fixed seats are arranged at the same side and are respectively arranged at two ends of the second tensioning roller, the upper ends of the fixed seats at the same side are respectively and rotatably connected with a rotating rod, a movable plate is arranged between the two rotating rods at the same side, two ends of the movable plate are respectively and rotatably connected with one ends of the two rotating rods far away from the fixed seats, a driving rod is arranged in the two fixed seats at one side of the two sides, one end of the driving rod is connected with a driving mechanism electrically connected with the numerical control unit, a fixed block is coaxially arranged on the driving rod, one side of the fixed block is rotatably connected with a connecting rod, the other end of the connecting rod is rotatably connected with one end of the movable plate, and the middle position of the two movable plates is rotatably connected with the second tensioning roller, be provided with pressure sensor between second tensioning roller and the movable plate, pressure sensor with the numerical control unit electricity is connected, numerical control unit control actuating mechanism, the actuating mechanism drive the actuating lever, the actuating lever drive the fixed block is followed the axial displacement of actuating lever, the fixed block drives the connecting rod reaches the movable plate removes, and the movable plate drives the pressure tensioning of second tensioning roller to the plastic film different degree.

3. The plastic film tension adjusting apparatus as claimed in claim 2, wherein: actuating mechanism includes the actuating cylinder that drives that links firmly with the actuating lever, drive actuating cylinder can dismantle connect in on the base, the actuating lever is worn through with one side two the fixing base, and can follow actuating lever endwise slip, link firmly on the actuating lever the fixed block, it drives actuating cylinder drive its axial displacement is followed to the actuating lever, in order to constitute the fixed block is followed the axial displacement of actuating lever.

4. The plastic film tension adjusting apparatus as claimed in claim 2, wherein: actuating mechanism includes the first servo motor who is connected with the actuating lever transmission, first servo motor can dismantle connect in on the base, the actuating lever wears to warp with one side two the fixing base, the actuating lever is the threaded rod, in just be located two on the threaded rod department threaded connection has between the fixing base the fixed block, first servo motor rotates and drives the threaded rod rotates, in order to constitute the fixed block is followed the axial displacement of actuating lever.

5. A plastic film tension adjusting apparatus as defined in claim 3, wherein: two can dismantle respectively on the movable plate and be connected with first rotation seat, first rotation seat includes the L template that the bisymmetry set up, two be equipped with between the L template and follow vertical gliding sliding seat, two can dismantle on the L template and be connected with and be used for fixing the mounting panel of sliding seat, install the bottom of mounting panel pressure sensor, the top of sliding seat with pressure sensor contacts, the both ends of second tensioning roller respectively with the sliding seat rotates to be connected.

6. The plastic film tension adjusting apparatus as claimed in claim 5, wherein: the clearance adjustment mechanism include two with the slide rail that the base linked firmly, each the axis of slide rail with the axis of actuating lever is parallel, the slide rail is close to the position department at its both ends and has the slider respectively sliding connection, and is same two sliders on the slide rail are worn through a rotation threaded rod, rotation threaded rod with slider threaded connection, the one end transmission of rotation threaded rod is connected with and is used for the drive rotate threaded rod pivoted second servo motor, second servo motor is connected with the numerical control unit electricity, each link firmly respectively on the slider height adjustment mechanism, height adjustment mechanism link firmly with the second rotation seat of first tensioning roller rotation connection, two on the same slide rail of second servo motor drive the slider is close to each other or keeps away from.

7. The plastic film tension adjusting apparatus as claimed in claim 6, wherein: the height adjusting mechanism comprises a driving hydraulic cylinder fixedly connected to the sliding block, the driving hydraulic cylinder is electrically connected with the numerical control unit, and the driving hydraulic cylinder comprises a hydraulic rod which is arranged in the hydraulic cylinder body in a telescopic mode and fixedly connected with the second rotating seat.

8. The plastic film tension adjusting apparatus as claimed in any one of claims 1 to 7, wherein: in just be located on the base the plastic film top links firmly the monitoring unit that is used for monitoring the damaged, torn condition of plastic film and carries out the monitoring, monitoring unit is including dismantling the extension board of connecting on the base and following vertical extension, the top of extension board is rotated and is connected with the fly leaf, the bottom of fly leaf has linked firmly a plurality of evenly distributed's infrared sensor, infrared sensor with the numerical control unit electricity is connected, fixed mounting has on the extension board and is used for adjusting the operating panel of numerical control unit's parameter and with the alarm that the numerical control unit electricity is connected, be provided with on the fly leaf and be used for keeping its spacing unit parallel with the horizontal plane.

9. The plastic film tension adjusting apparatus as claimed in claim 8, wherein: the limiting unit comprises a limiting plate which extends downwards along the vertical direction on the movable plate, the limiting plate is abutted against the extending plate in a laminating manner, and a handle which is used for facilitating overturning is fixedly connected to the side face of the movable plate.

10. The adjusting method of a plastic film tension adjusting apparatus as claimed in claim 9, characterized in that: the method specifically comprises the following steps:

s1, firstly, holding the handle by hand to turn the movable plate open, sequentially passing the plastic film through the first tensioning roller, the second tensioning roller and the other first tensioning roller from the conveying rollers, and conveying the plastic film out from the other conveying roller, wherein the plastic film is tightly attached to the lower parts of the conveying rollers, the upper parts of the first tensioning rollers and the lower parts of the second tensioning rollers for conveying;

s2, secondly, tensioning and adjusting the plastic film, controlling a hydraulic rod in a hydraulic cylinder body to adjust the height of a second rotating seat through the numerical control unit, and simultaneously driving two first tensioning rollers to adjust the height of the second rotating seat to rapidly and vertically tension the plastic film; the numerical control unit controls a second servo motor, the second servo motor drives a rotary threaded rod to rotate, and the rotary threaded rod drives two sliding blocks to approach or separate from each other, namely two first tensioning rollers are driven to approach or separate from each other, so that the plastic film is tensioned horizontally and rapidly;

s3, fine adjustment tensioning is conducted on the plastic film, in the process of tensioning the plastic film, when the plastic film is conveyed on the lower portion of a second tensioning roller, the plastic film is tightly attached to the second tensioning roller, the second tensioning roller drives a sliding seat to provide a pressure signal for a pressure sensor, if excessive tensioning or looseness occurs, the pressure sensor transmits the pressure signal to a numerical control unit, the numerical control unit controls a driving cylinder, the driving cylinder drives a driving rod, the driving rod drives a fixing block to move along the axial direction of the driving rod, the driving block drives a connecting rod and a moving plate to move, and the moving plate drives the second tensioning roller to tension the plastic film at small-amplitude pressure in different degrees, so that tensioning is achieved automatically;

s4, finally, the movable plate is placed to be parallel to the horizontal plane by holding the handle with hands, the limiting plate limits the movable plate to move downwards and keep parallel to the horizontal plane, the infrared sensor is arranged above the plastic film to monitor the damage, tearing and other conditions of the plastic film, when abnormality is found, the infrared sensor transmits the abnormal conditions to the numerical control unit, and the numerical control unit controls the alarm to give an alarm.

Technical Field

The invention belongs to the technical field of plastic film processing, and particularly relates to a plastic film tension adjusting device and a plastic film tension adjusting method.

Background

The plastic film is made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, is used for packaging and is used as a film coating layer, the share of plastic packaging and plastic packaging products on the market is getting larger, particularly composite plastic flexible packaging is widely applied to the fields of food, medicine, chemical industry and the like, wherein the proportion of the plastic packaging is the largest, such as beverage packaging, quick-frozen food packaging, steamed food packaging, fast food packaging and the like, the products bring great convenience to the life of people, the plastic film is often in different tightness in the conveying process, so that the plastic film is easy to be pulled out or folded, the quality of the plastic film is seriously influenced, the tension of the existing tensioning device is unstable, the conveying and rolling of the plastic film are easy to be influenced, the tension adjusting effect is poor, and the plastic film cannot be automatically tensioned, the manual regulation of tension is troublesome and not accurate, very big extravagant labour has reduced conveying efficiency.

Disclosure of Invention

The invention provides a plastic film tension adjusting device and a plastic film tension adjusting method, and solves the problems that in the prior art, a tension adjusting device is unstable in tension adjustment, manual adjustment is troublesome and inaccurate, and conveying efficiency is reduced.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the utility model provides a plastic film tension adjusting device, the key point lies in: the device comprises a tensioning mechanism arranged between two conveying rollers, wherein the tensioning mechanism comprises a first tensioning roller and a second tensioning roller, the first tensioning roller is arranged on a base in parallel at two ends of a conveying direction of a plastic film, the second tensioning roller is arranged on the base and is positioned between the two first tensioning rollers, the axes of the first tensioning roller, the second tensioning roller and the conveying rollers are parallel, the two conveying rollers are symmetrically arranged about the axis of the second tensioning roller, a gap adjusting mechanism electrically connected with a numerical control unit is constructed between the first tensioning roller and the base, a height adjusting mechanism used for vertically adjusting the height of the first tensioning roller and electrically connected with the numerical control unit is arranged on the first tensioning roller, the numerical control unit is arranged on the base, and controls the gap adjusting mechanism to enable the two first tensioning rollers to be far away from or close to each other, with constituting to two the regulation in clearance between the first tensioning roller, numerical control unit control first tensioning roller is along vertical removal to constitute the regulation to first tensioning roller height, be provided with on the second tensioning roller be used for carrying out the fine setting mechanism that finely tunes and be connected with the numerical control unit electricity to the plastic film, the plastic film paste tightly in first tensioning roller upper portion and paste tightly in the second tensioning roller lower part is carried.

Further, the fine adjustment mechanism comprises four fixed seats fixedly connected to the base, every two fixed seats are arranged at the same side and are respectively arranged at two ends of the second tensioning roller, the upper ends of the fixed seats at the same side are respectively and rotatably connected with a rotating rod, a moving plate is arranged between the two rotating rods at the same side, two ends of the moving plate are respectively and rotatably connected with one ends of the two rotating rods far away from the fixed seats, a driving rod is arranged in the two fixed seats at one side of the two sides, one end of the driving rod is connected with a driving mechanism electrically connected with the numerical control unit, the driving rod is coaxially provided with a fixed block, one side of the fixed block is rotatably connected with a connecting rod, the other end of the connecting rod is rotatably connected with one end of the moving plate, and the middle position of the two moving plates is rotatably connected with the second tensioning roller, be provided with pressure sensor between second tensioning roller and the movable plate, pressure sensor with the numerical control unit electricity is connected, numerical control unit control actuating mechanism, the actuating mechanism drive the actuating lever, the actuating lever drive the fixed block is followed the axial displacement of actuating lever, the actuating block drives the connecting rod reaches the movable plate removes, and the movable plate drives the pressure tensioning of second tensioning roller to the plastic film different degree.

Further, actuating mechanism includes the actuating cylinder that drives that links firmly with the actuating lever, drive actuating cylinder can dismantle connect in on the base, the actuating lever wears to warp with one side two the fixing base, and can follow actuating lever endwise slip, link firmly on the actuating lever the fixed block, drive actuating cylinder drive its endwise movement is followed to the actuating lever, in order to constitute the fixed block is followed the endwise movement of actuating lever.

Further, actuating mechanism includes the first servo motor who is connected with the actuating lever transmission, first servo motor can dismantle connect in on the base, the actuating lever is worn through with one side two the fixing base, the actuating lever is the threaded rod, in just be located two on the threaded rod department threaded connection has between the fixing base the fixed block, first servo motor rotates the drive the threaded rod rotates, in order to constitute the fixed block is followed the axial displacement of actuating lever.

Further, two can dismantle respectively on the movable plate and be connected with first rotation seat, first rotation seat includes the L template that the bisymmetry set up, two be equipped with between the L template and follow vertical gliding sliding seat, two can dismantle on the L template and be connected with and be used for fixing the mounting panel of sliding seat, install the bottom of mounting panel pressure sensor, the top of sliding seat with pressure sensor contacts, the both ends of second tensioning roller respectively with the sliding seat rotates to be connected.

Further, clearance adjustment mechanism include two with the slide rail that the base linked firmly, each the axis of slide rail with the axis of actuating lever is parallel, the slide rail is close to the position department at its both ends and sliding connection has the slider respectively, and is same two sliders on the slide rail wear to have a threaded rod of rotating, the threaded rod of rotating with slider threaded connection, the one end transmission of rotating the threaded rod is connected with and is used for the drive threaded rod pivoted second servo motor rotates, second servo motor is connected with the numerical control unit electricity, each link firmly respectively on the slider height adjustment mechanism, height adjustment mechanism link firmly with the second rotation seat that first tensioning roller rotated the connection, two on the same slide rail of second servo motor drive the slider is close to each other or keeps away from.

Furthermore, height adjustment mechanism including link firmly in the drive pneumatic cylinder on the slider, drive pneumatic cylinder with the numerical control unit electricity is connected, drive pneumatic cylinder include flexible in the hydraulic cylinder body with the hydraulic stem that the seat linked firmly is rotated to the second.

Further, in just be located on the base the plastic film top links firmly the monitoring unit that is used for monitoring the damaged, torn condition of plastic film and carries out the monitoring, monitoring unit is including dismantling the extension board of connecting on the base and following vertical extension, the top of extension board is rotated and is connected with the fly leaf, the bottom of fly leaf has linked firmly a plurality of evenly distributed's infrared sensor, infrared sensor with the numerical control unit electricity is connected, fixed mounting has on the extension board numerical control unit and with the alarm that the numerical control unit electricity is connected, be provided with on the fly leaf and be used for keeping its spacing unit parallel with the horizontal plane.

Further, limiting unit include in along vertical downwardly extending's limiting plate on the fly leaf, the limiting plate with the butt is laminated mutually to the extension, link firmly the handle that is used for making things convenient for the upset on the side of fly leaf.

The invention provides another technology, and an adjusting method of a plastic film tension adjusting device, which is characterized in that: the method specifically comprises the following steps:

s1, firstly, holding the handle by hand to turn the movable plate open, sequentially passing the plastic film through the first tensioning roller, the second tensioning roller and the other first tensioning roller from the conveying rollers, and conveying the plastic film out from the other conveying roller, wherein the plastic film is tightly attached to the lower parts of the conveying rollers, the upper parts of the first tensioning rollers and the lower parts of the second tensioning rollers for conveying;

s2, secondly, tensioning and adjusting the plastic film, controlling a hydraulic rod in a hydraulic cylinder body to adjust the height of a second rotating seat through the numerical control unit, and simultaneously driving two first tensioning rollers to adjust the height of the second rotating seat to rapidly and vertically tension the plastic film; the numerical control unit controls a second servo motor, the second servo motor drives a rotary threaded rod to rotate, and the rotary threaded rod drives two sliding blocks to approach or separate from each other, namely two first tensioning rollers are driven to approach or separate from each other, so that the plastic film is tensioned horizontally and rapidly;

s3, fine adjustment tensioning is conducted on the plastic film, in the process of tensioning the plastic film, when the plastic film is conveyed on the lower portion of a second tensioning roller, the plastic film is tightly attached to the second tensioning roller, the second tensioning roller drives a sliding seat to provide a pressure signal for a pressure sensor, if excessive tensioning or looseness occurs, the pressure sensor transmits the pressure signal to a numerical control unit, the numerical control unit controls a driving cylinder, the driving cylinder drives a driving rod, the driving rod drives a fixing block to move along the axial direction of the driving rod, the driving block drives a connecting rod and a moving plate to move, and the moving plate drives the second tensioning roller to tension the plastic film at small-amplitude pressure in different degrees, so that tensioning is achieved automatically;

s4, finally, the movable plate is placed to be parallel to the horizontal plane by holding the handle with hands, the limiting plate limits the movable plate to move downwards and keep parallel to the horizontal plane, the infrared sensor is arranged above the plastic film to monitor the damage, tearing and other conditions of the plastic film, when abnormality is found, the infrared sensor transmits the abnormal conditions to the numerical control unit, and the numerical control unit controls the alarm to give an alarm.

The technical scheme has the following advantages or beneficial effects:

the invention provides a plastic film tension adjusting device which is respectively and electrically connected with a gap adjusting mechanism, a height adjusting mechanism and a fine adjusting mechanism through a numerical control unit, wherein the numerical control unit controls the gap adjusting mechanism to enable two first tensioning rollers to be far away from or close to each other to finish the adjustment of the tension force of a plastic film, the numerical control unit controls the height adjusting mechanism to enable the first tensioning rollers to move along the vertical direction to finish the adjustment of the tension force of the plastic film, the numerical control unit controls the fine adjusting mechanism to enable a second tensioning roller to perform micro-amplitude tensioning adjustment on the plastic film, the tension is automatically adjusted in a small amplitude manner, the adjustment effect of the overall tension is improved, the numerical control unit controls the tensioning mechanism to adjust the tension force of the plastic film, the tension of the plastic film is adjusted in multiple directions, the stability of the plastic film in the conveying process is ensured, and the tension adjusting effect is good, the plastic film can be automatically tensioned, so that the conveying efficiency is improved, and the conveying, winding and quality of the plastic film are not influenced; the invention also provides an adjusting method of the plastic film tension adjusting device, wherein the plastic film is placed on the tension adjusting device, the numerical control unit controls the height adjusting mechanism to adjust the height of the first tensioning roller, the numerical control unit controls the gap adjusting mechanism to adjust the distance between the two first tensioning rollers, the plastic film is quickly tensioned, and when the plastic film is excessively tensioned or loosened in the tensioning process, the numerical control unit controls the micro-adjusting mechanism to enable the second tensioning roller to slightly tension the plastic film, so that the plastic film is automatically tensioned.

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 principles of the invention and not to limit the invention.

In the drawings:

FIG. 1 is a schematic structural view of example 1 of the present invention;

fig. 2 is a schematic structural view of a fine adjustment mechanism according to embodiment 1 of the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is an exploded view of an L-shaped plate, a second tension roller and a mounting plate in example 1 of the present invention;

fig. 5 is a schematic structural view of a backlash adjustment mechanism in embodiment 1 of the present invention;

FIG. 6 is a schematic structural view showing a plastic film conveying sequence in example 1 of the present invention;

fig. 7 is a schematic structural diagram of a monitoring unit in embodiment 1 of the present invention;

fig. 8 is a schematic structural view of a monitoring unit according to another angle in embodiment 1 of the present invention;

fig. 9 is a schematic structural view of a fine adjustment mechanism in embodiment 2 of the present invention.

Labeling components: 1-conveying roller, 2-first tensioning roller, 3-second tensioning roller, 4-base, 5-plastic film, 6-fixed base, 7-rotating rod, 8-moving plate, 9-driving rod, 10-fixed block, 11-connecting rod, 12-pressure sensor, 13-driving cylinder, 14-L-shaped plate, 15-sliding base, 16-mounting plate, 17-bulge, 18-chute, 19-sliding rail, 20-sliding block, 21-rotating threaded rod, 22-second servo motor, 23-second rotating base, 24-hydraulic cylinder body, 25-hydraulic rod, 26-extension plate, 27-moving plate, 28-infrared sensor, 29-operation panel, 30-alarm, 31-limiting plate, 32-handle, 33-first servomotor.

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present invention.

Embodiment 1 a plastic film tension adjusting apparatus

The embodiment discloses a plastic film tension adjusting device, as shown in fig. 1 and 6, comprising a tensioning mechanism, the tensioning mechanism is arranged between two conveying rollers 1, the tensioning mechanism comprises a first tensioning roller 2 and a second tensioning roller 3, the number of the first tensioning roller 2 is two, the two tensioning rollers are respectively arranged at two ends of a base 4 along the conveying direction of a plastic film 5, the second tensioning roller 3 is arranged on the base 4 and is positioned at a position between the two first tensioning rollers 2, the axes of the first tensioning roller 2, the second tensioning roller 3 and the conveying rollers 1 are parallel, the two conveying rollers 1 are symmetrically arranged about the axis of the second tensioning roller 3, a gap adjusting mechanism is constructed between the first tensioning roller 2 and the base 4, a height adjusting mechanism capable of adjusting the height of the first tensioning roller 2 along the vertical direction is arranged on the first tensioning roller 2, a fine adjusting mechanism for tensioning the plastic film 5 in a small range is arranged on the second tensioning roller 3, the base 4 is provided with a numerical control unit which is respectively and electrically connected with the gap adjusting mechanism, the height adjusting mechanism and the fine adjusting mechanism, the numerical control unit controls the gap adjusting mechanism to enable the two first tensioning rollers 2 to be far away from or close to each other to complete the adjustment of the tensioning force of the plastic film 5, the numerical control unit controls the height adjusting mechanism to enable the first tensioning rollers 2 to move along the vertical direction to complete the adjustment of the tensioning force of the plastic film 5, the numerical control unit controls the fine adjusting mechanism to enable the second tensioning roller 3 to perform the small-amplitude tensioning adjustment of the plastic film 5, the tension is automatically adjusted in a small-amplitude matching manner, the adjustment effect of the overall tension is improved, the numerical control unit controls the tensioning mechanism to adjust the tensioning force of the plastic film 5, the tension of the plastic film 5 is adjusted in multiple directions, and the stability of the plastic film 5 in the conveying process is ensured, the tension adjusting effect is good, the plastic film 5 can be automatically tensioned, the conveying efficiency is improved, and the conveying, winding and quality of the plastic film 5 are not affected; put into tension adjusting device with plastic film 5 on, numerical control unit control height adjustment mechanism adjusts first tensioning roller 2's height, numerical control unit control clearance adjustment mechanism adjusts the distance between two first tensioning rollers 2, accomplish the tensioning of plastic film 5 fast, when at the in-process of tensioning, when excessive tensioning or not hard up appear in plastic film 5, numerical control unit control fine adjustment mechanism makes second tensioning roller 3 carry out the small-amplitude tensioning to plastic film 5, realize the tensioning automatically, this embodiment has guaranteed the stable transport tensioning of plastic film 5 and has realized automaticly, the conveying efficiency and the quality of plastic film 5 have been improved.

As shown in fig. 2-4, the fine adjustment mechanism of this embodiment has a specific structure that the fine adjustment mechanism includes four fixing bases 6, the fixing bases 6 are fixedly connected to the base 4, every two fixing bases 6 are disposed on the same side and disposed at two ends of the second tensioning roller 3, the upper ends of the fixing bases 6 on the same side are rotatably connected to the rotating rods 7 respectively, a moving plate 8 is disposed between the two rotating rods 7 on the same side, two ends of the moving plate 8 are rotatably connected to one ends of the two rotating rods 7 away from the fixing bases 6 respectively, a driving rod 9 is disposed in the two fixing bases 6 on one of the two sides, one end of the driving rod 9 is connected to a driving mechanism, the driving mechanism is electrically connected to the numerical control unit, a fixing block 10 is coaxially disposed on the driving rod 9, a connecting rod 11 is rotatably connected to one side of the fixing block 10, and the other end of the connecting rod 11 is rotatably connected to one end of the moving plate 8, the middle positions of the two movable plates 8 are rotatably connected with a second tensioning roller 3, a pressure sensor 12 is arranged between the second tensioning roller 3 and the movable plates 8, the pressure sensor 12 is electrically connected with a numerical control unit, in the process of tensioning the plastic film 5, if the plastic film 5 is excessively tensioned or loosened, a pressure signal is transmitted to the numerical control unit by the pressure sensor 12, the numerical control unit controls a driving mechanism, the driving mechanism drives a driving rod 9, the driving rod 9 drives a fixed block 10 to move along the axial direction of the driving rod 9, the fixed block 10 drives a connecting rod 11 and the movable plates 8 to move, the movable plates 8 drive the second tensioning roller 3 to perform small-amplitude pressure tensioning on the plastic film 5, by the arrangement of the structure, the second tensioning roller 3 can be controlled to automatically adjust the tensioning degree of the plastic film 5 in the process of conveying the plastic film 5, if the excessive tensioning or loosening occurs, the stability of plastic film 5 transportation in-process has been guaranteed, and tension adjustment is effectual, can tension plastic film 5 automatically, has improved conveying efficiency, does not influence the transport and the rolling and the quality of plastic film 5.

As shown in fig. 2, the actuating mechanism in this embodiment includes driving actuating cylinder 13, it connects on base 4 to drive actuating cylinder 13 to dismantle, specifically be through the bolt fastening, drive actuating cylinder 13 and actuating lever 9 fixed connection, actuating lever 9 wears through two fixing bases 6 with one side, and can slide along the axis direction of actuating lever 9, fixedly connected with fixed block 10 on the actuating lever 9, it removes along the axis direction of actuating lever 9 to drive actuating cylinder 13 drive actuating lever 9, thereby can drive the removal of fixed block 10, fixed block 10 drives connecting rod 11 and movable plate 8 and removes, movable plate 8 drives second tensioning roller 3 and carries out the pressure tensioning of small-amplitude to plastic film 5.

As shown in fig. 2-4, in this embodiment, two moving plates are detachably connected with a first rotating seat respectively, the first rotating seat includes two L-shaped plates 14 that are symmetrically arranged, a sliding seat 15 that can slide along a vertical direction is assembled between the two L-shaped plates 14, specifically, a protrusion 17 with a T-shaped cross section is vertically formed on an inner side of the L-shaped plate 14, a sliding slot 18 that is matched with the protrusion 17 is formed on a side wall of the sliding seat 15, a mounting plate 16 is detachably connected to the two L-shaped plates 14, the mounting plate 16 is used for fixing the sliding seat 15 to move along the vertical direction, a pressure sensor 12 is installed at a bottom of the mounting plate 16, a top of the sliding seat 15 contacts with the pressure sensor 12, two ends of a second tensioning roller 3 are rotatably connected with the sliding seat 15 respectively, when a plastic film 5 is conveyed on a lower portion of the second roller 3, the plastic film 5 clings to the second tensioning roller 3, the second tensioning roller 3 drives the sliding seat 15 to provide a pressure signal to the pressure sensor 12, if the plastic film 5 is excessively tensioned or loosened, the pressure sensor 12 transmits a pressure signal to the numerical control unit, and the numerical control unit controls the driving cylinder 13 to adjust the second tensioning roller 3 so as to stably tension and convey the plastic film 5; this embodiment is through setting up two L templates 14, and sliding seat 15 slides between two L templates 14, and when the vulnerable part damage in second tensioning roller 3 need the maintenance change, can demolish mounting panel 16 fast to demolish sliding seat 15 and second tensioning roller 3 from L template 14, easy dismounting, labour saving and time saving.

As shown in fig. 5, the gap adjusting mechanism in this embodiment includes two slide rails 19, the slide rails 19 are fixedly connected with the base 4, the axis of each slide rail 19 is parallel to the axis of the driving rod 9, the slide rails 19 are respectively slidably connected with a slide block 20 near the two ends thereof, two slide blocks 20 are slidably arranged on one slide rail 19, wherein two slide blocks 20 on one slide rail 19 are penetrated by a rotating threaded rod 21, the rotating threaded rod 21 is in threaded connection with the slide blocks 20, one end of the rotating threaded rod 21 is in transmission connection with a second servo motor 22, the second servo motor 22 drives the rotating threaded rod 21 to rotate, the second servo motor 22 is electrically connected with a numerical control unit, each slide block 20 is respectively and fixedly connected with a height adjusting mechanism, the height adjusting mechanism is fixedly connected with a second rotating base 23, the second rotating base 23 is rotatably connected with the first tensioning roller 2, when the plastic film 5 is tensioned, control second servo motor 22 through numerical control unit and rotate, second servo motor 22 drives rotation threaded rod 21 and rotates, rotation threaded rod 21 drives two sliders 20 and is close to each other or keep away from to carry out quick tensioning to plastic film 5, what this embodiment was through setting up clearance adjustment mechanism, can carry out horizontal migration to first tensioning roller 2 automatically, and first tensioning roller 2 can carry out horizontal tensioning to plastic film 5 fast, in order to reach and carry out quick accurate tensioning to plastic film 5.

The concrete structure of high adjustment mechanism does in this embodiment, as shown in fig. 5, height adjustment mechanism includes drive hydraulic cylinder, drive hydraulic cylinder fixed connection is on slider 20, drive hydraulic cylinder and numerical control unit electricity are connected, drive hydraulic cylinder includes hydraulic cylinder body 24 and hydraulic stem 25, hydraulic stem 25 is flexible in pneumatic cylinder 24, hydraulic stem 25 and second rotate seat 23 fixed connection, control drive hydraulic cylinder through numerical control unit, make hydraulic stem 25 drive the second and rotate seat 23 and remove along vertical direction, thereby drive first tensioning roller 2 and reciprocate along vertical direction, consequently, can carry out vertical tensioning to plastic film 5 fast.

As shown in fig. 7 and 8, in the embodiment, a monitoring unit is fixedly connected to the base 4 and above the plastic film 5, the monitoring unit is used for monitoring the damage and tear of the plastic film 5, the monitoring unit includes an extension plate 26 detachably connected to the base 4, the extension plate 26 extends upward along a vertical direction, a movable plate 27 is rotatably connected to the top of the extension plate 26, a plurality of infrared sensors 28 are uniformly connected to the bottom of the movable plate 27, the infrared sensors 28 are electrically connected to the numerical control unit, an operation panel 29 for adjusting parameters of the numerical control unit is fixedly installed on the extension plate 26, an alarm 30 is further fixedly installed on the extension plate 26, the alarm 30 is electrically connected to the numerical control unit, when the plastic film 5 is damaged or torn, the infrared sensors 28 transmit signals to the numerical control unit after detecting, and the numerical control unit controls the alarm 30 to alarm, thereby reminding workers of the conveying condition of the plastic film 5 and being very convenient; be provided with spacing unit on the fly leaf 27, spacing unit is used for keeping fly leaf 27 parallel with the horizontal plane, and spacing unit specifically includes limiting plate 31, and limiting plate 31 forms along vertical direction downwardly extending on fly leaf 27, and limiting plate 31 and extension board 26 are laminated the butt mutually, and fixedly connected with is used for making things convenient for the staff to overturn the handle 32 of fly leaf on fly leaf 27's the side, with fly leaf 27 upset back, puts into plastic film 5 or shifts out this embodiment.

Embodiment 2 a plastic film tension adjusting device

This embodiment is based on embodiment 1, as shown in fig. 9, actuating mechanism includes first servo motor 33, first servo motor 33 and the transmission of actuating lever 9 are connected, connection can be dismantled on base 4 to first servo motor 33, actuating lever 9 wears to pass through two fixing bases 6 with one side, actuating lever 9 is the threaded rod, and on the threaded rod and lie in two threaded connection of department between the fixing base 6 and have fixed block 10, first servo motor 33 rotates and drives the threaded rod and rotate, drive fixed block 10 and remove along the axis direction of actuating lever 9, fixed block 10 drives connecting rod 11 and movable plate 8 and removes, movable plate 8 drives second tensioning roller 3 and carries out the pressure tensioning of small-amplitude to plastic film 5.

Embodiment 3 adjusting method of plastic film tension adjusting device

The present embodiment is based on embodiment 1, and as shown in fig. 1 to 9, provides an adjusting method of a plastic film tension adjusting device, which specifically includes the following steps:

s1, firstly, the handle 32 is held by hand to turn the movable plate 27 open, the plastic film 5 is conveyed out from the conveying roller 1 through one of the first tensioning roller 2, the second tensioning roller 3 and the other first tensioning roller 2 in sequence and the other conveying roller 1, and at the moment, the plastic film 5 is closely attached to the lower part of the conveying roller 1, the upper part of the first tensioning roller 2 and the lower part of the second tensioning roller 3 for conveying;

s2, secondly, tensioning and adjusting the plastic film 5, controlling a hydraulic rod 25 in a hydraulic cylinder body 24 to adjust the height of a second rotating seat 23 through a numerical control unit, and simultaneously driving two first tensioning rollers 2 to adjust the height of the second rotating seat 23 to rapidly tension the plastic film 5 in the vertical direction; the numerical control unit controls a second servo motor 22, the second servo motor 22 drives a rotary threaded rod 21 to rotate, and the rotary threaded rod 21 drives two sliding blocks 20 to approach or separate from each other, namely two first tensioning rollers 2 to approach or separate from each other, so as to rapidly tension the plastic film 5 in the horizontal direction;

s3, then, performing fine adjustment tensioning on the plastic film 5, wherein in the tensioning process of the plastic film 5, when the plastic film 5 is conveyed at the lower part of the second tensioning roller 3, the plastic film 5 is tightly attached to the second tensioning roller 3, the second tensioning roller 3 drives the sliding seat 15 to provide a pressure signal for the pressure sensor 12, if the plastic film 5 is excessively tensioned or loosened, the pressure sensor 12 transmits the pressure signal to the numerical control unit, the numerical control unit performs drive control on the driving cylinder 13, the driving cylinder 13 drives the driving rod 9, the driving rod 9 drives the fixed block 10 to move along the axial direction of the driving rod 9, the driving rod 9 drives the connecting rod 11 and the moving plate 8 to move, the moving plate 8 drives the second tensioning roller 3 to tension the plastic film 5 at different small-amplitude pressures, and the tensioning is automatically realized;

and S4, finally, the movable plate 27 is placed at a position parallel to the horizontal plane by holding the handle 32 with hands, the limit plate 31 limits the downward movement of the movable plate 27 and keeps the movable plate parallel to the horizontal plane, the infrared sensor 28 is arranged above the plastic film 5 to monitor the conditions of breakage, tearing and the like of the plastic film 5, when an abnormality is found, the infrared sensor 28 transmits a signal to the numerical control unit, and the numerical control unit controls the alarm 30 to give an alarm.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.