CN217260845U

CN217260845U - Plastic bag packing machine head with enhanced tension

Info

Publication number: CN217260845U
Application number: CN202220408637.4U
Authority: CN
Inventors: 阎玉刚; 郑良泉; 徐红彦; 魏鹏; 王举庆
Original assignee: Zibo Jieda Mechanical Co ltd
Current assignee: Zibo Jieda Mechanical Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-08-23
Anticipated expiration: 2032-02-28

Abstract

A plastic bag packing machine head with enhanced tension belongs to the technical field of packing machines. Send band pulley (1) and take-up pulley (3) including the interval setting, be provided with idler (2) in the lower part between send band pulley (1) and take-up pulley (3), send band pulley (1) and idler (2) contact, its characterized in that: the device is characterized in that a corner protector (8) is arranged, the tensioning wheel (3) is arranged inside the corner protector (8), a rotating shaft is arranged below the corner protector (8), the corner protector (8) swings by taking the rotating shaft as an axis, a tensioning block (7) for pushing the corner protector (8) to swing is arranged on one side of the corner protector (8), and the tensioning wheel (3) is contacted with or separated from the idle wheel (2) along with the swing of the corner protector (8). In this tight reinforcing plastic bag baling press head that rises, through setting up the tight piece that rises, the tight piece that rises promotes take-up pulley and idler contact, has improved the frictional force between take-up pulley and the idler, avoids the emergence of the not tight condition of packing because of the frictional force is not enough and leads to, has improved the packing quality.

Description

Plastic bag packing machine head with enhanced tension

Technical Field

A plastic bag packing machine head with enhanced tension belongs to the technical field of packing machines.

Background

The packing machine head is a core component of a plastic belt packing machine and is used for completing the key functions of conveying, tensioning (tightening), head and tail bonding, cutting and the like of a packing belt. Whether the packed articles are fastened or not is not easy to loosen, and the tightness degree of the packing belt is mainly determined, so that the tighter articles are firmer within the bearing range of the packing belt. The belt-packing tightness depends on the tension force, so that the improvement of the packing tension force is a key index of the quality of the packing head.

When a traditional packer works, the packing head comprises the following processes:

(1) the tape feeding process is shown in fig. 4. When the tape needs to be fed, the tape feeding motor is started to drive the tape feeding wheel 1 to rotate anticlockwise, and at the moment, the packing tape 10 is dragged to move forwards through friction force formed between the tape feeding wheel 1 and the idler wheel 2. The packing belt 10 is fed around a gap between the idler pulley 2 and the tension pulley 3 and a gap between the tension pulley 3 and the corner bead 8.

(2) In the tensioning process, as shown in fig. 5, when the baling press needs to wind the strap, the strap feeding motor rotates reversely to drive the strap feeding wheel 1 to rotate clockwise, and the strap 10 is dragged to move reversely by the friction force formed between the strap feeding wheel 1 and the idler wheel 2. When the packing belt 10 moves reversely, the packing object is tensioned, and the packing belt 10 is tightened. Packing area 10 tightens up and exerts the power of dragging to take-up pulley 3, and the swing of pulling take-up pulley 3 makes take-

up pulley

3 and 2 contact back and applys positive pressure to idler 2, and the sensor signals this moment, and PLC sends the instruction and starts the tight motor that rises, and the tight motor drive take-up pulley 3 anticlockwise rotation utilizes the frictional force between take-up pulley 3 and the idler 2 to drag packing area 10 taut to accomplish the tight process that rises.

As can be seen from the above, the tightening force of the strapping band 10 during tensioning depends on the friction between the tensioning wheel 3 and the idler wheel 2. Whereas friction is related to the coefficient of friction and the positive pressure. When the materials and surface shapes of the idler pulley 2, the tension pulley 3 and the strapping band 10 are determined, the friction coefficient is a constant value, so that the tightening force of the strapping band 10 is considered to depend only on the friction between the tension pulley 3 and the idler pulley 2, namely the positive pressure of the tension pulley 3 on the idler pulley 2.

However, in practical use, it is found that, in the packing head of the conventional packing machine, after the positive pressure of the tension pulley 3 to the idler pulley 2 completely depends on the belt feeding pulley 1 to pull the packing belt 10, the packing belt 10 drags power to the tension pulley 3, when the pressure between the belt feeding pulley 1 and the idler pulley 2 slips due to insufficiency, the dragging power of the packing belt 10 to the tension pulley 3 is insufficient, so the positive pressure between the tension pulley 3 and the idler pulley 2 can also drop, so that the friction is easily insufficient, and finally the packing is not tight and loose, thereby affecting the packing quality.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: overcome prior art's not enough, provide one kind through setting up the tight piece that rises, the tight piece that rises promotes take-up pulley and idler contact, has improved the frictional force between take-up pulley and the idler, avoids the emergence of the tight condition of packing that leads to because of frictional force is insufficient, has improved the tight plastic bag baling press head of reinforcing that rises of packing quality.

The utility model provides a technical scheme that its technical problem adopted is: this plastic bag baling press head that rises and tightly strengthens, send band pulley and take-up pulley including the interval setting, the lower part between sending band pulley and take-up pulley is provided with the idler, send the band pulley and contact its characterized in that with the idler: the tension pulley is arranged in the corner protector, a rotating shaft is arranged below the corner protector, the corner protector swings by taking the rotating shaft as an axis, a tension block for pushing the corner protector to swing is arranged on one side of the corner protector, and the tension pulley is contacted with or separated from the idler pulley along with the swing of the corner protector.

Preferably, a side plate is erected on the side portion of the corner protector, the tensioning block moves up and down on the inner side of the side plate, and a tensioning cylinder for driving the tensioning block to ascend and descend is arranged on the outer side of the side plate.

Preferably, a through hole is vertically formed in the surface of the side plate, a driving rod is arranged at the piston shaft of the tensioning cylinder, and the driving rod penetrates through the vertical through hole of the side plate to be connected with the tensioning block.

Preferably, the tensioning block comprises a back plate and a tensioning inclined block fixed on the surface of the back plate, the side surface of the tensioning inclined block facing the corner protector is an inclined surface, a guide rail is arranged on the surface of the side plate, and the tensioning block slides along the guide rail.

Preferably, a group of guide strips are arranged on the inner side surface of the side plate side by side, a gap is formed between each guide strip on the two sides and the surface of the side plate at an interval, the two ends of the tensioning block are respectively clamped in the gaps on the two sides, and the gaps on the two sides are opposite to form the guide rail.

Preferably, the width of the tensioning inclined block is smaller than that of the back plate, and two ends of the back plate are clamped in gaps between the two guide strips and the side plates respectively.

Preferably, a first bearing and a second bearing are arranged in the corner protector, the first bearing is in contact with the tensioning wheel, and the second bearing is in contact with the tensioning block.

Compared with the prior art, the utility model discloses the beneficial effect who has is:

in this tight reinforcing plastic bag baling press head that rises, through setting up the tight piece that rises, the tight piece that rises promotes take-up pulley and idler contact, has improved the frictional force between take-up pulley and the idler, avoids the emergence of the not tight condition of packing because of the frictional force is not enough and leads to, has improved the packing quality.

Drawings

Fig. 1 is an isometric view of a tension enhanced plastic bag baler head.

Fig. 2 is a front view of the plastic bag packing machine head with enhanced tension.

Fig. 3 is a schematic view of the tension block structure of the plastic bag packaging machine head with enhanced tension.

Fig. 4 is a schematic view illustrating a head feed process of a related art plastic bag packing machine.

Fig. 5 is a schematic view showing a tensioning process of a plastic bag wrapping machine head in the prior art.

Wherein: 1. the device comprises a belt conveying wheel 2, an idler wheel 3, a tensioning wheel 4, a first bearing 5, a second bearing 6, a tensioning cylinder 7, a tensioning block 8, a corner guard 9, a side plate 10, a packing belt 11, a guide strip 12, a tensioning inclined block 13 and a back plate.

Detailed Description

Fig. 1 to 3 are preferred embodiments of the present invention, and the present invention will be further explained with reference to fig. 1 to 3.

As shown in fig. 1-2, a tension-enhanced plastic bag packing machine head comprises a main frame, wherein a side plate 9 is vertically arranged on one side of the main frame. A corner protector 8 is provided on the inner side of the side plate 9. A circular groove is formed in one side, back to the side plate 9, of the corner protector 8, and a tensioning wheel 3 is rotatably arranged in the circular groove; a bearing mounting groove is provided in a surface of the corner protector 8 facing the side plate 9, a second bearing 5 is provided in the bearing mounting groove, and an outer surface of the second bearing 5 protrudes from a side surface of the corner protector 8.

Another bearing installation groove is formed in the inner side of the second bearing 5, a first bearing 4 is arranged in the bearing installation groove, the outer surface of the first bearing 4 is positioned in the groove for installing the tension wheel 3, and the surface of the first bearing 4 is in contact with the outer surface of the tension wheel 3. The bottom of the angle bead 8 is provided with a rotating shaft, the angle bead 8 swings with the rotating shaft as the shaft, and when the angle bead 8 swings, the tensioning wheel 3, the first bearing 4 and the second bearing 5 are driven to swing synchronously.

The belt feeding wheel 1 is provided at an interval on one side of the tension wheel 3, the idle wheel 2 is provided at a lower portion between the tension wheel 3 and the belt feeding wheel 1, and a surface of the idle wheel 2 is in contact with a surface of the belt feeding wheel 1. The packing belt 10 passes through the surface of the rear edge idler wheel 2 from the space between the belt feeding wheel 1 and the idler wheel 2 to the inside of the corner protector 8, and after entering the inside of the corner protector 8, the packing belt 10 bypasses the surface of the tension wheel 3, passes through the space between the tension wheel 3 and the first bearing 4 and then is output from the top of the corner protector 8.

The outer side surface of the side plate 9 is provided with a tensioning cylinder 6, a piston rod of the tensioning cylinder 6 is provided with a shaft driving rod, the side plate 9 is provided with a vertical hole, and the driving rod horizontally extends to the inner side of the side plate 9 after penetrating through the vertical hole. The driving rod extends to the inner side of the side plate 9 and then is fixed with the tensioning block 7, and the piston rod of the tensioning cylinder 6 drives the tensioning block 7 to move up and down on the inner side of the side plate 9 through the driving rod when lifting.

Referring to fig. 3, the tensioning block 7 includes a back plate 13 and a tensioning inclined block 12 fixed on the surface of the back plate 13, the width of the tensioning inclined block 12 is smaller than that of the back plate 13, and the side of the tensioning inclined block 12 facing the corner protector 8 is an inclined surface. A group of guide strips 11 are arranged on the inner side surface of the side plate 9 side by side, a gap is formed between each of the guide strips 11 on the two sides and the surface of the side plate 9 at intervals, the gaps on the two sides are opposite to form a guide rail for the tensioning block 7 to move up and down, the two ends of the back plate 13 are respectively clamped in the gaps between the two guide strips 11 and the side plate 9, the tensioning inclined block 12 is exposed out of the gaps between the guide strips 11 on the two sides, the guide strips 11 on the two sides play a limiting and guiding role on the tensioning block 7, and therefore the tensioning inclined block 12 is guaranteed to move up and down on the inner side surface of the side plate 9.

The specific working process and working principle are as follows:

the tensioning-enhanced plastic bag packaging machine head comprises a belt feeding process and a tensioning process during working, wherein in the belt feeding process, a belt feeding motor (not shown in the figure) is started to drive a belt feeding wheel 1 to rotate anticlockwise, and a packaging belt 10 is dragged to advance through friction force formed between the belt feeding wheel 1 and an idler wheel 2. The packing belt 10 bypasses the idler wheel 2 and extends to the inside of the corner protector 8 along the surface of the idler wheel 2, and after entering the inside of the corner protector 8, the packing belt 10 bypasses the surface of the tension wheel 3 and then passes through between the tension wheel 3 and the first bearing 4 to be output from the top of the corner protector 8.

In the tensioning process, when the baling press needs to take up the belt, the belt feeding motor rotates reversely to drive the belt feeding wheel 1 to rotate clockwise, and the baling belt 10 is dragged to reversely advance through the friction force formed between the belt feeding wheel 1 and the idler wheel 2. When the packing belt 10 moves reversely, the packing object is tensioned, and the packing belt 10 is tightened. The packing belt 10 is tightened to apply dragging force to the tensioning wheel 3, the tensioning wheel 3 is pulled to swing, positive pressure is applied to the idler wheel 2 after the tensioning wheel 3 is contacted with the idler wheel 2, the sensor sends out a signal at the moment, the PLC controls the output of a piston rod of the tensioning cylinder 6, and the piston rod of the tensioning cylinder 6 drives the tensioning block 7 to move upwards through the driving rod after being output. After the tensioning inclined block 12 in the tensioning block 7 contacts the second bearing 5, the corner protector 8 is further pushed to swing, and the tensioning wheel 3 arranged in the corner protector 8 gradually approaches the idler wheel 2 and finally contacts the idler wheel 2.

Because the end face of the tensioning inclined block 12 facing the corner protector 8 is an inclined face, in the process that the inclined face is gradually contacted with the second bearing 5 from top to bottom, the pressure applied to the surface of the idle wheel 2 by the tensioning wheel 3 is gradually increased, so that the tensioning wheel 3 is more tightly pressed on the idle wheel, the pressure between the tensioning wheel 3 and the idle wheel 2 is greatly increased, and the friction force between the tensioning wheel 3 and the idle wheel 2 is increased. And finally, a tensioning motor (not shown in the figure) drives the tensioning wheel 3 to rotate anticlockwise, and the friction force between the tensioning wheel 3 and the idler wheel 2 is utilized to drag the packing belt 10 to be tensioned, so that the tensioning process is completed.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a plastic bag baling press head that rises and tightly strengthens, includes that band feed wheel (1) and take-up pulley (3) that the interval set up, lower part between band feed wheel (1) and take-up pulley (3) is provided with idler (2), band feed wheel (1) and idler (2) contact, its characterized in that: the device is characterized in that a corner protector (8) is arranged, the tensioning wheel (3) is arranged inside the corner protector (8), a rotating shaft is arranged below the corner protector (8), the corner protector (8) swings by taking the rotating shaft as an axis, a tensioning block (7) for pushing the corner protector (8) to swing is arranged on one side of the corner protector (8), and the tensioning wheel (3) is contacted with or separated from the idle wheel (2) along with the swing of the corner protector (8).

2. The tension-enhanced plastic bag baling head of claim 1, wherein: a side plate (9) is erected on the side part of the corner protector (8), the tension block (7) moves up and down on the inner side of the side plate (9), and a tension cylinder (6) for driving the tension block (7) to lift is arranged on the outer side of the side plate (9).

3. The tension-enhanced plastic bag packing machine head as claimed in claim 2, wherein: the surface of the side plate (9) is vertically provided with a through hole, a piston shaft of the tensioning cylinder (6) is provided with a driving rod, and the driving rod penetrates through the vertical through hole of the side plate (9) and is connected with the tensioning block (7).

4. The tension-enhanced plastic bag baling head of claim 2 or 3, wherein: the tensioning block (7) comprises a back plate (13) and a tensioning inclined block (12) fixed on the surface of the back plate (13), the side face, facing the corner protector (8), of the tensioning inclined block (12) is an inclined face, a guide rail is arranged on the surface of the side plate (9), and the tensioning block (7) slides along the guide rail.

5. The tension-enhanced plastic bag packing machine head as claimed in claim 4, wherein: a group of guide strips (11) are arranged on the inner side face of the side plate (9) side by side, a gap is formed between each of the guide strips (11) on the two sides and the surface of the side plate (9) at intervals, the two ends of the tensioning block (7) are clamped in the gaps on the two sides respectively, and the guide rails are formed by the gaps on the two sides oppositely.

6. The tension-enhanced plastic bag baling head of claim 4, wherein: the width of the tensioning inclined block (12) is smaller than that of the back plate (13), and two ends of the back plate (13) are respectively clamped in gaps between the two guide strips (11) and the side plates (9).

7. The tension-enhanced plastic bag baling head of claim 1, wherein: a first bearing (4) and a second bearing (5) are arranged in the corner protector (8), the first bearing (4) is in contact with the tensioning wheel (3), and the second bearing (5) is in contact with the tensioning block (7).