CN217321096U - Full-automatic packaging film labeling device with adjustable tensioning mechanism - Google Patents

Abstract

The application relates to a full-automatic packaging film labeling device with an adjustable tensioning mechanism, which comprises a device body, wherein the device body is provided with a discharging mechanism for placing a label paper roll and a first rotating roller group for winding the label paper roll, and the adjustable tensioning mechanism is arranged between the discharging mechanism and the first rotating roller group; the adjustable tensioning mechanism comprises a swinging arm, a supporting rod and a tensioning roller, wherein one side of the swinging arm is hinged to the device body, the supporting rod is fixed on the free side of the swinging arm, the tensioning roller is rotatably connected to one side of the supporting rod, which is far away from the swinging arm, and the label paper is wound on the first rotating roller group after bypassing the tensioning roller; and a tension spring is arranged between the swing arm and the device body and is used for enabling the swing arm to rotate towards the direction far away from the first rotating roller set. The full-automatic packaging film labeling device with the adjustable tensioning mechanism can enable the tensioning roller to be adjusted in position according to the thickness change of the label paper roll, so that the complex operation that an operator adjusts the position of the tensioning roller repeatedly is omitted, and the labor intensity of the operator is reduced.

Description

Full-automatic packaging film labeling device with adjustable tensioning mechanism

Technical Field

The application relates to a packaging film pastes mark equipment technical field, especially relates to a full-automatic packaging film pastes mark device with adjustable straining device.

Background

The packaging film labeling machine is equipment for labeling a packaging film, corresponding LOGO, quality marks or anti-counterfeiting marks are printed on the surface of the packaging film, and then the packaging film is packaged on the periphery of a product, so that a consumer can clearly know information of the product, and the consumer can purchase the product at ease.

When the existing packaging film labeling machine labels a packaging film, a packaging film roll and a label paper roll are required to be sequentially wound on a plurality of rotating rollers, so that the packaging film roll and the label paper roll can be smoothly conveyed forwards. The label paper roll and the adjacent rotating roll paper roll are provided with tensioning rollers for tensioning the label paper roll, the positions of the tensioning rollers on the equipment body are fixed, the continuous forward conveying of the label paper roll can cause the thickness of the whole roll of the label paper roll to be continuously reduced, the tensioning force between the label paper roll and the tensioning rollers is continuously increased at the moment, the condition that the label paper roll is broken in the forward conveying process can be caused, and an operator needs to repeatedly adjust the positions of the tensioning rollers according to the field condition to change the tensioning force between the label paper roll and the tensioning rollers; the adjustment in the operation process is complicated.

SUMMERY OF THE UTILITY MODEL

In order to reduce the operation that the operating personnel adjusted the tensioning roller position repeatedly, this application provides a full-automatic packaging film pastes mark device with adjustable straining device.

The application provides a pair of full-automatic packaging film pastes mark device with adjustable straining device adopts following technical scheme:

a full-automatic packaging film labeling device with an adjustable tensioning mechanism comprises a device body, wherein the device body is provided with a discharging mechanism for placing a label paper roll and a first rotating roll group for winding the label paper roll, and the adjustable tensioning mechanism is arranged between the discharging mechanism and the first rotating roll group; the adjustable tensioning mechanism comprises a swinging arm, a supporting rod and a tensioning roller, one side of the swinging arm is hinged to the device body, the supporting rod is fixed on the free side of the swinging arm, the tensioning roller is rotatably connected to one side of the supporting rod, which is far away from the swinging arm, and the label paper is wound on the first rotating roller group after bypassing the tensioning roller; and a tension spring is arranged between the swing arm and the device body and is used for enabling the swing arm to rotate towards the direction far away from the first rotating roller set.

Through adopting foretell technical scheme, the subsides mark device of this application need walk around the label scroll in first rotation roller set again after the tensioning roller with the use. When first rotation roller group operated, first rotation roller group can drive the label scroll when carrying forward, made the swing arm simultaneously around self and the articulated swing of department of installing the body for the tensioning roller can be to the direction removal near first rotation roller set, is in the lax state between tensioning roller and the label paper this moment, and the extension spring atress is elongated. When the first rotating roller set stops rotating, the elastic force of the tension spring can drive the swing arm to reset and swing, so that the tension roller can tension the label paper again.

In the process of pasting label paper on a packaging film, the tension roller can be intermittently abutted to the label paper under the action of the elastic force of the tension spring, and the tension roller can be adjusted in position according to the thickness change of the label paper roll, so that the tension force between the label paper roll and the tension roller can be automatically kept in a proper range, the tedious operation of repeatedly adjusting the position of the tension roller by an operator is omitted, and the labor intensity of the operator is reduced.

Optionally, the discharging mechanism is arranged above the first rotating roller set, and the rotating connection position of the swing arm and the device body is located between the discharging mechanism and the first rotating roller set; the connecting part of the tension spring and the swing arm is positioned on one side of the swing arm, which is far away from the feeding mechanism, and the vertical projection of the connecting part of the tension spring and the device body in the extending direction of the swing arm is positioned on one side of the swing arm, which is close to the feeding mechanism; an included angle is formed between the tension spring and the swing arm, and the included angle ranges from 40 degrees to 70 degrees.

By adopting the technical scheme, when the first rotating roller group stops rotating, the gravity of the adjustable tensioning mechanism and the tensioning force of the tensioning roller acting on the label paper can be balanced with the elastic force of the tension spring; through the arrangement of the connecting position and the included angle between the tension spring and the swing arm, the elastic force generated by the tension spring can be more efficiently applied to the swing arm; the elasticity transmission efficiency of the tension spring is high, and the swing arm can be quickly and smoothly reset upwards to rotate.

Optionally, the discharging mechanism comprises a discharging roller rotatably mounted on the device body and two baffles arranged on the discharging roller, and a placing area for placing the label paper roll is formed between the two baffles at intervals.

Through adopting foretell technical scheme, the region of placing that forms between two baffles can be used for placing the label scroll, and the label scroll is placed and can be followed the blowing roller and rotate behind the blowing roller for the tensioning roller can stimulate the label scroll and rotate when the elastic force effect of extension spring resets the butt label paper, makes the label paper carry forward gradually.

Optionally, the device body is provided with a fixed seat for rotatably mounting the discharging roller, the discharging roller penetrates through the fixed seat, and the baffle and the swing arm are arranged on the same side of the fixed seat; and an elastic limiting mechanism is arranged on the other side of the fixed seat and used for limiting the rotation angle of the swing arm.

Through adopting foretell technical scheme, when the label scroll used up the back and need change the book, elasticity stop gear's setting can restrict swing arm luffing angle for the operation personnel can conveniently bypass the tensioning roller after changing the label scroll, reduces the intensity of labour that the operation personnel changed the label scroll.

Optionally, an extension rod is fixed to one side of the swing arm away from the support rod, and the extension rod extends to one side of the fixing seat away from the baffle; the elastic limiting mechanism comprises a turntable, a belt and a return spring, the turntable is fixed on one side of the discharging roller, which is far away from the baffle, and the return spring is fixed on the device body; one end fixed connection of belt keeps away from one side of baffle in the extension rod, and other end fixed connection is in reset spring, the both ends of belt are located the both sides of carousel respectively, the middle part of belt is supported and is pasted in the carousel.

By adopting the technical scheme, when the swing arm swings upwards around the hinge joint of the swing arm and the fixed seat under the action of the elasticity of the tension spring, the extension rod fixed on the swing arm can swing downwards, so that one end of the belt is driven to move downwards; the reset spring of the belt other end can be stretched upwards this moment, and the reset spring deformation in-process produces the elastic force that acts on the extension rod gradually to offset each other with the elastic force of extension spring, make the tensioning roller can stop in the position that is close to first rotation roller set, make things convenient for the operation personnel to change the label scroll.

Optionally, the angle between the support rod and the swing arm is adjustable.

By adopting the technical scheme, the relative position between the tensioning roller and the first rotating roller group can be changed by adjusting the relative angle between the support rod and the swing arm; through letting the tensioning roller be located same horizontal position with first rotation roller set to let the tensioning roller be close to in first rotation roller set, be favorable to improving the stability that label paper carried forward when the tensioning roller removed, reduce the emergence of the card paper condition.

Optionally, an integrally formed mounting block is arranged on one side surface of the supporting rod, and the mounting block is a regular polygon; the free side of swing arm is equipped with the mounting groove with installation piece matching gomphosis, the installation piece is fixed through the fastener after installing in the mounting groove.

Through adopting foretell technical scheme, through setting up the installation piece into regular polygon, change the installation angle of installation piece and mounting groove and can play the effect of adjusting branch and the relative angle of swing arm, and then play the effect of adjusting the tensioning roller position.

Optionally, the periphery side of tensioning roller is fixed with two elasticity pad covers, two the interval sets up between the elasticity pad cover.

Through adopting foretell technical scheme, can form the location area that is used for fixed label paper after two elasticity cushion cover interval set up, can reduce the condition that the off tracking appears in the forward transportation process of label paper.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the adjustable tensioning mechanism, the tensioning roller can perform position adaptive adjustment according to the thickness change of the label paper roll in the process of sticking the label paper on the packaging film, so that the complicated operation of repeatedly adjusting the position of the tensioning roller by an operator is omitted, and the labor intensity of the operator is reduced;

2. through the arrangement of the connecting position and the included angle between the tension spring and the swing arm, the elastic force generated by the tension spring can be more efficiently applied to the swing arm, the transmission efficiency of the elastic force of the tension spring is high, and the swing arm can be quickly and smoothly reset upwards to rotate;

3. through setting up elasticity stop gear with restriction swing arm upward swinging's angle, can conveniently walk around the tensioning roller with label paper after the operation personnel change the label scroll, reduce the intensity of labour that the operation personnel changed the label scroll.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment 1;

fig. 2 is a sectional view of the entire structure of this embodiment 1, mainly showing a transport path of a wrapping film and a label paper;

FIG. 3 is an enlarged view at A in FIG. 1;

FIG. 4 is a schematic structural diagram of the adjustable tensioning mechanism of the present embodiment 1;

fig. 5 is an exploded view of the swing arm and the support rod in the embodiment 2.

Description of the reference numerals: 1. a device body; 11. a fixed seat; 12. a vertical rod; 2. an air-bulking roller; 3. a second rotating roller; 4. a wind-up roll; 5. a discharging mechanism; 51. a discharge roller; 52. a baffle plate; 53. a placement area; 6. an adjustable tensioning mechanism; 61. swinging arms; 611. an extension rod; 612. mounting grooves; 62. a strut; 621. mounting blocks; 63. a tension roller; 631. an elastic cushion cover; 64. a tension spring; 65. an elastic limiting mechanism; 651. a turntable; 652. a belt; 653. a return spring; 7. a first rotating roller; 8. a scrap roll; 81. a first motor; 9. a label sticking mechanism; 91. a fixed mount; 92. and (4) pressing the rolls.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

Example 1:

the embodiment of the application discloses full-automatic packaging film pastes mark device with adjustable straining device.

Referring to fig. 1, a full-automatic packaging film labeling device with an adjustable tensioning mechanism comprises a device body 1, wherein a packaging film transportation module and a label paper pasting module are mounted on the device body 1; the label paper pasting module is positioned above the packaging film transportation module.

Referring to fig. 1 and 2, the packaging film transportation module of this embodiment includes inflatable roller 2, second rotation roller set and wind-up roll 4 that set gradually along packaging film direction of delivery, and wherein inflatable roller 2 rotates to be connected in device body 1 for fixed packaging film rolls. The second rotating roller group comprises a plurality of second rotating rollers 3 which are arranged along the conveying direction of the packaging film and are used for winding the packaging film and driving the packaging film to convey forwards through the friction force between the packaging film and the second rotating rollers 3; each of the second rotating rollers 3 is rotatably connected to the apparatus body 1. Wind-up roll 4 rotates to be connected in device body 1, and the one end connection of wind-up roll 4 is used for ordering about wind-up roll 4 pivoted second motor, and the second motor is used for driving the packaging film and carries forward.

Referring to fig. 1 and 2, an integrally formed fixing seat 11 is fixed on the upper surface of the device body 1, and the label paper sticking module is arranged on the fixing seat 11; the label sticking module comprises a discharging mechanism 5, an adjustable tensioning mechanism 6, a first rotating roller set and a waste roller 8 which are sequentially arranged along the conveying direction of the label paper roll.

Referring to fig. 1 and 2, the discharging mechanism 5 includes a discharging roller 51 and two baffles 52, the discharging roller 51 penetrates through two sides of the fixing seat 11 and is rotatably connected with the fixing seat 11, so that the discharging roller 51 can rotate circumferentially around its central axis; the two baffles 52 are jointly sleeved on the discharging roller 51, and the two baffles 52 are both positioned on one side of the fixed seat 11 close to the packaging film transportation module; the two shutters 52 are spaced apart from each other and form a placement area 53 for placing a label roll. The baffle 52 close to the fixed seat 11 of the two baffles 52 is fixedly connected to the discharging roller 51, the baffle 52 far away from the fixed seat 11 is detachably connected with the discharging roller 51, and the used label paper roll can be conveniently replaced by detaching the baffle 52 on the outer side.

Referring to fig. 2 and 3, the first rotating roller group is disposed below the discharging roller 51. The first rotating roller group comprises a plurality of first rotating rollers 7 which are arranged along the conveying direction of the label paper and are used for winding the label paper and driving the label paper to be conveyed forwards through the friction force between the label paper and the first rotating rollers 7; each first rotating roller 7 is rotatably connected to the fixed seat 11, and each first rotating roller 7 is located above the second rotating roller 3. A label pasting mechanism 9 is arranged between one of the first rotating rollers 7 and the second rotating roller 3, the label pasting mechanism 9 comprises a fixing frame 91 fixedly connected to the device body 1 and a pressing roller 92 rotatably installed on the fixing frame 91, and the pressing roller 92 abuts against the upper side of the adjacent second rotating roller 3.

Referring to fig. 2 and 3, in use, after the label paper sequentially passes around the first rotating roller 7, the label paper passes through a space between the press roller 92 and the adjacent second rotating roller 3; the label paper then passes around the bottom of the holder 91 and is fixed to the waste roller 8 at the rear end. The label paper is continuously fed forward to the fixing frame 91, the label on the label paper can be pressed on the packaging film by the pressing roller 92, and the release paper on the label paper can be collected around the roll by the subsequent waste roller 8. The waste roller 8 is rotationally connected to the device body 1, one end of the waste roller 8 is connected with a first motor 81 for driving the waste roller 8 to rotate, and the first motor 81 is used for driving the label paper to be conveyed forwards; the first motor 81 of the present embodiment operates in an intermittent manner.

Referring to fig. 4, the adjustable tensioning mechanism 6 includes a swing arm 61, a support rod 62, a tensioning roller 63 and a tension spring 64, wherein one side of the swing arm 61 is rotatably connected to the fixed seat 11, and the rotary connection position of the swing arm 61 and the fixed seat 11 is located between the discharging roller 51 and the first rotating roller 7; the swing arm 61 and the baffle 52 are positioned on the same side of the fixed seat 11. Branch 62 fixed connection is in the free side of swing arm 61, and tensioning roller 63 rotates to be connected in branch 62 and keeps away from one side of swing arm 61 for tensioning roller 63 can do circumferential direction around the axis of self, is used for tensioning label paper in order to improve the stability that label paper carried. The periphery side of tensioning roller 63 is fixed with two elasticity pad covers 631, and the elasticity pad cover 631 of this embodiment adopts rubber materials to make, directly cup joints in tensioning roller 63 through filling up 631 with the elasticity to make two elasticity pad covers 631 between the interval set up, can form the location area that is used for the location label paper, prevents the off tracking of label paper.

Referring to fig. 4, a vertical rod 12 connected with a tension spring 64 is fixed on the outer side surface of the fixed seat 11, one end of the tension spring 64 is connected to one side of the vertical rod 12 far away from the fixed seat 11, and the other end of the tension spring 64 is connected to the swing arm 61; the tension spring 64 can always generate an elastic force acting on the swing arm 61 to rotate the swing arm 61 in a direction away from the first rotating roller 7. When the label paper roll is conveyed, the gravity of the adjustable tensioning mechanism 6 and the tensioning force of the tensioning roller 63 acting on the label paper can keep a relative balance state with the elastic force of the tension spring 64; when the label paper is conveyed forward, the tension roller 63 moves to a direction close to the first rotating roller 7, at this time, the elastic force of the tension spring 64 becomes large, and the tension spring 64 can pull the swing arm 61 to swing upward, so that the tension roller 63 can automatically reset and be tensioned on the tension roller 63.

Referring to fig. 3 and 4, in the embodiment, the connection point of the tension spring 64 and the swing arm 61 is disposed on one side of the swing arm 61 away from the fixing base 11, the vertical projection of the connection point of the tension spring 64 and the vertical rod 12 in the extending direction of the swing arm 61 is disposed on one side close to the fixing base 11, and an included angle in the range of 40 degrees to 70 degrees is formed between the tension spring 64 and the swing arm 61, so that the elastic force generated by the tension spring 64 can more efficiently act on the swing arm 61, and the swing arm 61 can be conveniently and smoothly rotated upwards.

Referring to fig. 1 and 4, an extension bar 611 is fixed on one side of the swing arm 61 away from the support rod 62, the extension bar 611 is L-shaped, and one side of the extension bar 611 away from the swing arm 61 extends to one side of the fixing base 11 away from the baffle 52. An elastic limiting mechanism 65 is arranged between the extension rod 611 and the device body 1, and the elastic limiting mechanism 65 is used for limiting the upward swinging angle of the swing arm 61, so that the label paper can be conveniently wound around the tensioning roller 63 when the label paper is replaced by an operator.

Referring to fig. 1 and 4, the elastic limiting mechanism 65 of the present embodiment includes a rotary disc 651, a belt 652 and a return spring 653, wherein the rotary disc 651 is fixedly connected to the discharging roller 51, so that the rotary disc 651 can rotate along with the discharging roller 51; the rotary table 651 and the shutter 52 are respectively located on both sides of the fixing base 11 in the thickness direction. The return spring 653 is welded to the apparatus body 1, and the return spring 653 and the extension bar 611 are respectively located on both sides of the fixing frame 91 in the width direction. One end of the belt 652 is fixedly connected to one side of the extension rod 611 far away from the swing arm 61, and the other end of the belt 652 is fixedly connected to the return spring 653; the middle portion of the belt 652 abuts the turntable 651 and is in tension.

When the operator detaches the used label paper roll, the tension spring 64 can pull the swing arm 61 and make the swing arm 61 swing upwards, at this time, the extension rod 611 rotates downwards along with the swing arm 61, and can pull the belt 652 to move around the turntable 651, so that the return spring 653 is driven by the belt 652 to stretch and extend; the elastic force generated after the extension of the return spring 653 can be offset from the elastic force of the tension spring 64, so that the tension roller 63 can be stopped at a position close to the first rotating roller 7, and the label paper can be conveniently replaced by an operator.

The implementation principle of the embodiment 1 of the application is as follows:

when first motor 81 moves and drives the label scroll and carry forward, label paper can stimulate swing arm 61 and make swing arm 61 swing around self and the articulated department of fixing base 11 for tensioning roller 63 can be to the direction removal of being close to first rotation roller set, is in the lax state between tensioning roller 63 and the label paper this moment, and extension spring 64 atress is elongated. When the first motor 81 stops rotating intermittently, the elastic force of the tension spring 64 can drive the swing arm 61 to swing upward again, so that the tension roller 63 can tension the label paper again. The tensioning roller 63 can be adjusted in position according to the thickness change of the label paper roll in the whole process, so that the tensioning force between the label paper roll and the tensioning roller 63 can be automatically kept in a proper range, the tedious operation that an operator repeatedly adjusts the position of the tensioning roller 63 is omitted, and the labor intensity of the operator is reduced.

Example 2:

the embodiment of the application discloses full-automatic packaging film pastes mark device with adjustable straining device.

Referring to fig. 5, the embodiment of the present application discloses a full-automatic packaging film labeling device with an adjustable tensioning mechanism, which is different from embodiment 1 in that:

the angle between the strut 62 and the swing arm 61 is set to be adjustable in this embodiment. The side of the support bar 62 is provided with an integrally formed mounting block 621, and the mounting block 621 is positioned on one side of the extension direction of the support bar 62; the mounting block 621 is provided in a regular polygonal shape. The free side of swing arm 61 is opened and is equipped with mounting groove 612, and the shape of mounting groove 612 and the shape phase-match of installation piece 621, and after the installation piece 621 of swing arm 61 was installed in mounting groove 612, use the fastener to be fixed in mounting groove 612 with installation piece 621, can make branch 62 and swing arm 61 be connected firmly.

When installation piece 621 installs, through the installation angle who changes installation piece 621 and mounting groove 612, can play the effect of adjusting branch 62 and the relative angle of swing arm 61, and then play the effect of adjusting tensioning roller 63 position, can make tensioning roller 63 stop in the position that is close to first turning roll 7, be favorable to improving the stability that label paper carried forward when tensioning roller 63 removed, reduce the emergence of the card paper condition.

The above is a preferred embodiment of the present application, and the scope of protection of the present application is not limited by the above, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a full-automatic packaging film pastes mark device with adjustable straining device, includes device body (1), its characterized in that: the device body (1) is provided with a discharging mechanism (5) for placing a label paper roll and a first rotating roll set for winding the label paper roll, and an adjustable tensioning mechanism (6) is arranged between the discharging mechanism (5) and the first rotating roll set;

the adjustable tensioning mechanism (6) comprises a swing arm (61) with one side hinged to the device body (1), a support rod (62) fixed to the free side of the swing arm (61) and a tensioning roller (63) rotatably connected to one side, far away from the swing arm (61), of the support rod (62), and the label paper winds around the first rotating roller set after winding around the tensioning roller (63); install extension spring (64) between swing arm (61) and device body (1), extension spring (64) are used for making swing arm (61) to the direction rotation of keeping away from first rotation roller set.

2. The full-automatic packaging film labeling device with the adjustable tensioning mechanism as claimed in claim 1, wherein: the discharging mechanism (5) is arranged above the first rotating roller set, and the rotating connection position of the swing arm (61) and the device body (1) is positioned between the discharging mechanism (5) and the first rotating roller set; the joint of the tension spring (64) and the swing arm (61) is positioned on one side of the swing arm (61) far away from the discharging mechanism (5), and the vertical projection of the joint of the tension spring (64) and the device body (1) in the extension direction of the swing arm (61) is positioned on one side of the swing arm (61) close to the discharging mechanism (5); an included angle is formed between the tension spring (64) and the swing arm (61), and the included angle ranges from 40 degrees to 70 degrees.

3. The full-automatic packaging film labeling device with the adjustable tensioning mechanism as claimed in claim 2, wherein: the discharging mechanism (5) comprises a discharging roller (51) rotatably mounted on the device body (1) and two baffle plates (52) arranged on the discharging roller (51), and a placing area (53) for placing label paper rolls is formed between the baffle plates (52) at intervals.

4. The full-automatic packaging film labeling device with the adjustable tensioning mechanism as claimed in claim 3, wherein: the device body (1) is provided with a fixed seat (11) for rotatably installing a discharging roller (51), the discharging roller (51) penetrates through the fixed seat (11), and the baffle plate (52) and the swing arm (61) are arranged on the same side of the fixed seat (11); the other side of fixing base (11) is equipped with elasticity stop gear (65), elasticity stop gear (65) are used for limiting the turned angle of swing arm (61).

5. The full-automatic packaging film labeling device with the adjustable tensioning mechanism as claimed in claim 4, wherein: an extension rod (611) is fixed on one side, away from the support rod (62), of the swing arm (61), and the extension rod (611) extends to one side, away from the baffle (52), of the fixed seat (11); the elastic limiting mechanism (65) comprises a rotary disc (651), a belt (652) and a return spring (653), the rotary disc (651) is fixed on one side, away from the baffle (52), of the discharging roller (51), and the return spring (653) is fixed on the device body (1); one end of the belt (652) is fixedly connected to one side of the extension rod (611) far away from the baffle (52), the other end of the belt is fixedly connected to the reset spring (653), two ends of the belt (652) are respectively located on two sides of the turntable (651), and the middle of the belt (652) abuts against the turntable (651).

6. The full-automatic packaging film labeling device with the adjustable tensioning mechanism as claimed in claim 1, wherein: the angle between the support rod (62) and the swing arm (61) is adjustable.

7. The full-automatic packaging film labeling device with the adjustable tensioning mechanism as claimed in claim 6, wherein: an integrally formed mounting block (621) is arranged on one side face of the support rod (62), and the mounting block (621) is arranged to be a regular polygon; the free side of swing arm (61) is equipped with mounting groove (612) with installation piece (621) matching gomphosis, installation piece (621) are installed and are fixed through the fastener behind mounting groove (612).

8. The full-automatic packaging film labeling device with the adjustable tensioning mechanism as claimed in claim 1, wherein: the periphery side of the tensioning roller (63) is fixed with two elastic cushion covers (631), and the two elastic cushion covers (631) are arranged at intervals.

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