CN211165567U

CN211165567U - Sealing machine

Info

Publication number: CN211165567U
Application number: CN201921594800.5U
Authority: CN
Inventors: 江忠清; 江忠虎; 江翠萍
Original assignee: Nanjing Gaosheng Fire Fighting Agentia Co ltd
Current assignee: Nanjing Gaosheng Fire Fighting Agentia Co ltd
Priority date: 2019-09-24
Filing date: 2019-09-24
Publication date: 2020-08-04
Anticipated expiration: 2029-09-24

Abstract

The utility model discloses a sealing machine, which comprises a frame; the driving device is arranged on the lower rack unit; the lower sealing unit comprises a lower cross rod and a lower pressing rod, the lower cross rod is arranged on the upper surface of the lower rack unit, a lower heating part is arranged on the lower cross rod, the lower pressing rod is positioned right above the lower cross rod, and the lower pressing rod is driven by a driving device to move up and down relative to the left support frame and the right support frame and is used for pressing down a plastic film positioned on the lower heating part; and the upper sealing unit comprises an upper cross rod and an upper pressing rod, the two ends of the upper cross rod are respectively arranged on the left support frame and the right support frame, an upper heating part is arranged at the top of the lower cross rod, the upper pressing rod is positioned right above the upper cross rod, and the two support frames are driven by a driving device to move up and down relatively and left and right for pressing down the plastic film positioned on the upper heating part. The utility model discloses once can seal the operation to two plastic film, improve the efficiency of sealing.

Description

Sealing machine

Technical Field

The utility model relates to a sealing machine.

Background

The fire-fighting medicament is one of the indispensable materials in the current fire control field, and the storage of fire-fighting medicament is higher to the dryness factor requirement, and the plastic bag is used in the storage of current fire-fighting medicament, sheathes the snake belt again on the plastic bag overcoat, and the snake belt is more durable, is difficult for being destroyed, and inside plastic bag has fine dampproofing and waterproofing effect, if purchase the good plastic film of rolling, seal the preparation plastic bag of holding by oneself before the use, then can reduce more cost.

The plastic bag is manufactured by sealing the end part of the plastic film by the sealing machine, the current sealing machine can only manufacture one plastic bag by sealing once, the sealing efficiency is low, on the other hand, the plastic bag is low in manufacturing quality due to the fact that the plastic used for manufacturing the plastic bag is often deviated in the conveying process, the direction leading to the sealing is not perpendicular to the length direction of the plastic bag, the size of the plastic bag manufactured in the mode is correspondingly reduced, the plastic bag is used for containing fire-fighting agents, and the quality error is large.

Disclosure of Invention

The utility model aims at providing a capper when solving among the prior art by plastic film preparation plastic bag, seals the technical defect of inefficiency.

In order to solve the above problems, the utility model adopts the following technical proposal: the sealing machine comprises a rack, wherein the rack comprises a lower rack unit and an upper rack unit, the upper rack unit comprises two supporting frames, and the two supporting frames are respectively arranged at the left end and the right end of the lower rack unit; the driving device is arranged on the lower rack unit; the lower sealing unit comprises a lower cross rod and a lower pressing rod, the lower cross rod is arranged on the upper surface of the lower rack unit, a lower heating part is arranged on the lower cross rod, the lower pressing rod is positioned right above the lower cross rod, and the lower pressing rod is driven by a driving device to move up and down relative to the left support frame and the right support frame and is used for pressing down a plastic film positioned on the lower heating part; an upper sealing unit; the upper sealing unit is positioned above the lower sealing unit and comprises an upper cross rod and an upper pressure rod, the two ends of the upper cross rod are respectively arranged on the left support frame and the right support frame, an upper heating part is arranged at the top of the lower cross rod, the upper pressure rod is positioned right above the upper cross rod, and the upper support frame and the lower support frame are driven by a driving device to move up and down relatively and left, so that the plastic film positioned on the upper heating part is pressed downwards. The utility model discloses two seal the unit about setting up, can seal two plastic film simultaneously and handle, so once can make two plastic bags, great improvement make the efficiency of plastic bag by plastic film.

As the utility model discloses a further improvement still includes the pull rod of two vertical settings, and two pull rods pass respectively about two braced frame and lower frame unit are connected with drive arrangement to reciprocate by the drive arrangement drive, the both ends of depression bar and last depression bar are connected with two pull rods respectively down, and the depression bar reciprocates with last depression bar along with reciprocating of pull rod in step down. The utility model discloses set up the pull rod, go up and seal the unit down and can seal the processing by one set of drive arrangement drive to plastic film, simplify the utility model discloses a drive arrangement's quantity.

As a further improvement of the utility model, the utility model also comprises a lower buffer device and an upper buffer device; the lower buffer device comprises a left lower buffer unit, a right lower buffer unit and a lower pressing plate, the lower buffer unit comprises a lower sliding block and a lower spring, the lower sliding block is sleeved on the pull rod and can slide up and down on the pull rod, the lower pressing rod is connected with the lower sliding block, the lower pressing plate is arranged on the pull rod in a non-sliding manner, and two ends of the lower spring are respectively connected with the lower sliding block and the lower pressing plate; the upper buffer device comprises a left upper buffer unit and a right upper buffer unit and a lower pressing plate, the upper buffer unit comprises an upper sliding block and an upper spring, the lower sliding block is sleeved on the upper portion of the pull rod and can slide up and down relative to the pull rod, the upper pressing rod is connected with the upper sliding block, the upper pressing plate is arranged on the pull rod without sliding, and the upper end and the lower end of the upper spring are respectively connected with the upper sliding block and the upper pressing plate. The utility model discloses set up buffer down and go up buffer, delay plastic film by the time of pushing down, avoid plastic film atress suddenly and damage.

As a further improvement of the utility model, the utility model also comprises a lower guide rod and an upper guide rod; the lower guide rod penetrates through the lower sliding block and the lower pressing plate simultaneously, a first upper fixing piece is arranged at the top end of the lower guide rod and above the lower pressing plate, a first lower fixing piece is arranged at the bottom end of the lower guide rod and below the lower sliding block, the lower spring is sleeved on the lower guide rod, and the upper spring contracts or extends along with the downward or upward movement of the pull rod; the upper guide rod penetrates through the upper sliding port and the upper pressing plate simultaneously, a second upper fixing piece is arranged above the upper pressing plate at the top end of the upper guide rod, a second lower fixing piece is arranged below the upper sliding block at the bottom end of the upper guide rod, the upper spring is sleeved on the upper guide rod, and the upper spring contracts or extends along with the downward or upward movement of the pull rod. The utility model discloses set up down direction and last guide bar, prevent down spring and last spring at flexible in-process with the utility model discloses break away from mutually.

As a further improvement of the utility model, the pull rod is provided with a lower thread section and an upper thread section; the lower pressing plate is arranged on the lower threaded section, and the upper side and the lower side of the lower pressing plate are respectively provided with a lower fixing nut in threaded fit with the lower threaded section and used for installing the lower pressing plate on the pull rod; the upper pressure plate is arranged on the upper threaded section, and the upper side and the lower side of the upper pressure plate are respectively provided with an upper fixing nut in threaded fit with the upper threaded section and used for installing the upper pressure plate on the pull rod. The utility model discloses a nut and pull rod cooperate, and two nuts can be fixed bottom plate and top board respectively on lower screw thread section and top thread section.

As the utility model discloses a further improvement, drive arrangement is that two detachable install the cylinder at the lower frame unit left and right ends, and the piston rod of two cylinders is connected with the bottom of two pull rods respectively, and the piston rod of cylinder is flexible to be used for the drive pull rod to reciprocate. This reality reciprocates with novel flexible drive pull rod through cylinder piston rod to the simple to operate of cylinder.

As a further improvement of the utility model, the device also comprises two lower conveying rollers and two upper conveying rollers; two ends of the two lower conveying rollers are respectively and rotatably connected with the lower parts of the two supporting frames, and the two lower conveying rollers are respectively positioned at the front side and the rear side of the lower cross rod; two ends of the two upper conveying rollers are respectively rotatably connected with the upper parts of the two supporting frames, and the two upper conveying rollers are respectively positioned on the front side and the rear side of the upper cross rod. The utility model discloses set up down conveying roller and last conveying roller, the plastic film's of being convenient for transport.

As a further improvement, a supporting plate is fixedly arranged on each of the front side and the rear side of each supporting frame, and the upper conveying roller is rotatably connected with the supporting plate. The utility model discloses set up the backup pad, improve the height of last conveying roller, when need not seal, plastic film erects, can not contact with last heater block, avoids high temperature to cause the damage to other positions of plastic bag, improves the quality of the plastic bag of making.

As a further improvement, the lower conveying roller is provided with a lower limiting ring at each of the left and right ends, and the upper conveying roller is provided with an upper limiting ring at each of the left and right ends. The utility model discloses spacing ring and last spacing ring under the setting, what have the effect avoids plastic film to be partial to one side in transportation process.

To sum up, the beneficial effects of the utility model are that: the utility model discloses once can seal the operation to two plastic film, improved the efficiency of sealing, the utility model discloses still have simple structure's advantage.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is a schematic perspective view of another angle of the present invention.

Fig. 4 is a partially enlarged view at B in fig. 3.

Wherein: 1. a lower frame unit; 2. a support frame; 3. a drive device; 4. a lower cross bar; 5. a lower pressure lever; 6. an upper cross bar; 7. an upper pressure lever; 8. a pull rod; 9. a lower pressing plate; 10. a lower slider; 11. a lower spring; 12. an upper pressure plate; 13. an upper sliding block; 14. an upper spring; 15. a lower guide rod; 16. an upper guide rod; 17. a lower thread section; 18. an upper thread section; 19. a lower fixing nut; 20. an upper fixing nut; 21. a lower conveying roller; 22. an upper conveying roller; 23. a support plate; 24. a lower limit ring; 25. an upper confinement ring.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

The sealing machine shown in fig. 1 to 4 includes a frame, a driving device 3, a lower sealing unit, and an upper sealing unit.

The rack comprises a lower rack unit 1 and an upper rack unit, the upper rack unit comprises two supporting frames 2, and the two supporting frames 2 are respectively arranged at the left end and the right end of the lower rack unit 1; the supporting frame 2 is provided with a rectangular channel penetrating through the left side and the right side of the supporting frame, and the bottom of the supporting frame 2 is preferably detachably arranged at the top of the upper rack unit by adopting two bolts.

The utility model provides a drive arrangement 3 installs on lower frame unit 1, the utility model discloses preferred drive arrangement is two cylinders of installing both ends about lower frame unit 1, and the cylinder body of cylinder adopts bolt detachable to install on lower frame unit, and the piston rod of cylinder is vertical upwards and stretch out and draw back perpendicularly, the utility model provides a piston rod of two cylinders extends simultaneously or contracts simultaneously.

The lower sealing unit comprises a lower cross rod 4 and a lower pressing rod 5, the lower cross rod 4 is installed on the upper surface of the lower rack unit 1, a lower heating part (not shown in the figure) is arranged on the lower cross rod 4, the lower pressing rod 5 is located right above the lower cross rod 4, the driving device 3 drives the two supporting frames 2 to move up and down relatively and is used for pressing a plastic film on the lower heating part downwards, and when the plastic film sealing position is located on the lower heating part, the cylinder drives the lower pressing rod 4 to move downwards to press the plastic film on the lower heating part to realize the sealing treatment of the plastic film.

The upper sealing unit is positioned above the lower sealing unit and comprises an upper cross rod 6 and an upper pressure rod 7, two ends of the upper cross rod 6 are detachably mounted on the left supporting frame and the right supporting frame 2 respectively through bolts, an upper heating part (not shown in the figure) is arranged at the top of the lower cross rod 4, the upper pressure rod 7 is positioned right above the upper cross rod 6, the two supporting frames 2 are driven by the driving device 3 to move up and down relatively, the upper supporting frame and the lower supporting frame are used for pressing down plastic films positioned on the upper heating part, and the sealing mode is the same as that of the upper sealing unit.

The utility model discloses there are the pull rod 8 of two vertical settings, two support frame 2 and lower frame unit 1 are connected with drive arrangement 3 about two pull rods 8 pass respectively, specifically be open on support frame 2 and have the first installation through-hole that runs through its upper and lower surface, it has the second installation through-hole that runs through its top and bottom to open on lower frame unit 1, first installation through-hole equals and coaxial setting with the aperture of second installation through-hole, two position poles 8 reciprocate by two cylinder drives respectively, the both ends of depression bar 5 and last depression bar 7 are connected with two pull rods 8 respectively down, depression bar 5 and last depression bar 7 reciprocate along with reciprocating of pull rod 8 in step. The utility model discloses one set of drive arrangement 3 can drive and go up and press a 7 and push down 4 synchronous vertical migration of pole.

The utility model provides a buffer for pressing the plastic film downwards, and is provided with a lower buffer device and an upper buffer device; the lower buffer device comprises a left lower buffer unit, a right lower buffer unit and a lower pressing plate 9, the lower buffer unit comprises a lower sliding block 10 and a lower spring 11, a vertical through hole penetrating through the upper surface and the lower surface of the lower sliding block 10 is formed in the lower sliding block 10, the diameter of the vertical through hole is slightly larger than that of the pull rod 8, the lower sliding block 10 is sleeved on the pull rod 8 and can slide up and down on the pull rod 8, two ends of the lower pressing rod 5 are respectively detachably connected with the lower sliding blocks 10 of the two lower buffer devices, the lower pressing plate 9 is arranged on the pull rod 8 in a non-sliding manner, and two ends of the lower spring 11 are respectively connected with the lower sliding block 10 and the lower pressing; go up buffer and include two left and right sides and go up buffer unit and top board 12, go up buffer unit and include last sliding block 13 and last spring 14, go up sliding block 13 cover and establish on the upper portion of pull rod 8 and can slide from top to bottom relatively pull rod 8, go up the left and right sides both ends of depression bar 7 and be connected with the last sliding block 13 of the last buffer of both ends about respectively, top board 12 sets up on pull rod 8 without sliding, go up upper spring 14 upper and lower both ends and connect top board 13 and top board 12 respectively, set up the frame and move up without sliding in this application and do not have relative slip for two parts that are connected.

In order to further ensure that the lower spring 11 and the upper spring 14 are not separated due to stress when the springs extend and contract, the utility model is provided with a lower guide rod 15 and an upper guide rod 16; the lower guide rod 15 penetrates through the lower sliding block 10 and the lower pressing plate 9 simultaneously, a first upper fixing piece is arranged at the top end of the lower guide rod 15 and above the lower pressing plate 9, a first lower fixing piece is arranged at the bottom end of the lower guide rod 15 and below the lower sliding block 10, the lower spring 11 is sleeved on the lower guide rod 15, and the upper spring 14 contracts or extends along with the downward or upward movement of the pull rod 8; the lower sliding block 10 in the utility model is in an inverted T shape, the bottom of the lower sliding block extends to the left and right sides to form a first fixed part and a second fixed part, the first fixed part is positioned at one side close to another lower buffer device, a lower threaded hole is arranged on the first fixed part, lower threaded rods are respectively arranged at the two ends of the lower pressing rod 5, and the end part of each lower threaded rod extends into the corresponding lower threaded hole and is in threaded fit with the corresponding lower threaded hole; a first lower sliding through hole (not shown in the figure) penetrating through the upper surface and the lower surface of the second fixing part is formed in the second fixing part, a second lower sliding through hole (not shown in the figure) is formed in the lower pressing plate 9, and the upper end and the lower end of the lower guide rod 15 respectively penetrate through the second lower sliding through hole and the first lower sliding through hole; this last guide arm 16 runs through last sliding block 13 and top board 12 simultaneously, is located the top of top board 12 and is provided with the upper mounting of second on the top of last guide arm 16, and the bottom of going up guide arm 16 is located the below of last sliding block 13 and is provided with the lower mounting of second, goes up spring 14 cover and establishes on last guide arm 16, and upper spring 14 contracts or extends along with pull rod 8 downward or rebound, the utility model provides an upper guide arm 16's mounting means is the same with lower guide arm 15's mounting means.

The utility model discloses well pull rod 8 does not have sliding connection's particular mode with holding down plate 9 and top board 12 and is: a lower threaded section 17 and an upper threaded section 18 are arranged on the pull rod 8, a lower fixing through hole (not shown in the figure) is formed in the lower pressure plate 9, the lower threaded section 17 is arranged in the lower fixing through hole, and lower fixing nuts 19 in threaded fit with the lower threaded section 17 are respectively arranged on the upper side and the lower side of the lower pressure plate 9 and used for installing the lower pressure plate 9 on the pull rod 8; an upper fixing through hole (not shown) is formed in the upper pressure plate 12, an upper thread section 18 is arranged in the upper fixing through hole, and upper fixing nuts 20 which are in threaded fit with the upper thread section 18 are respectively arranged on the upper side and the lower side of the upper pressure plate 12 and used for installing the upper pressure plate 12 on the pull rod 8.

The utility model discloses the piston rod of well two cylinders is connected with two pull rod 8's bottom respectively, and the piston rod of cylinder is flexible to be used for driving pull rod 8 and reciprocates. The utility model discloses owing to be provided with two pull rods 8, the flexible drive holding down plate 9 of piston rod and the upper pressure plate 12 of two cylinders are synchronous upwards or move down.

In order to facilitate the conveying of the sealed plastic film, the utility model is provided with two lower conveying rollers 21 and two upper conveying rollers 22; two ends of the two lower conveying rollers 21 are respectively and rotatably connected with the lower parts of the two supporting frames 2 by adopting bearings (not shown in the figure), and the two lower conveying rollers 21 are respectively positioned at the front side and the rear side of the lower cross rod 4; two upper feed rollers 22 are rotatably connected at both ends thereof to upper portions of the two support frames 2 by bearings (not shown), respectively, and the two upper feed rollers 22 are positioned at front and rear sides of the upper cross bar 6, respectively. The utility model discloses the preferred backup pad 23 that respectively is provided with fixedly in both sides around every braced frame 2, goes up conveying roller 22 and adopts the bearing rotation to be connected with backup pad 23 to raise the height of last conveying roller 22.

In order to keep plastic film can not take place the slope left or right in transportation process, the utility model discloses both ends respectively are provided with a lower spacing ring 24 about lower conveying roller 21, and the distance between 24 and plastic film's width equals about every lower conveying roller 21 two lower spacing rings, and both ends respectively are provided with one and go up spacing ring 25 about going up conveying roller 22, and every is gone up the width that spacing ring 25 was gone up to two upper spacing rings 25 on going up on conveying roller 22 between two. The utility model provides a lower spacing ring 24 is last along radially opening radial screw hole (not shown in the figure), at radial threaded hole in be provided with rather than screw-thread fit's fixing bolt (not shown in the figure), screw up fixing bolt, its tip compresses tightly down conveying roller 21 and can realize the fixed of spacing ring 24 and lower conveying roller 21 down.

When the pull rod 8 is driven by the air cylinder to move downwards, the upper pressing plate 12 and the lower pressing plate 9 move downwards along with the air cylinder, the upper pressing plate 12 and the lower pressing plate 9 respectively compress the upper spring 14 and the lower spring 11, the upper pressing rod 7 and the lower pressing rod 5 also move downwards simultaneously, when the upper and lower

pressing rods

7 and 5 are brought into contact with the plastic films on the upper and lower heating members and press the plastic films against the upper and lower heating members, the upper pressing plate 12 and the lower pressing plate 9 continue to press the upper pressing rod 7 and the lower pressing rod 5 downwards through the upper spring 14 and the lower spring 11 until sealing is completed, the cylinder pushes the pull rod 8 to move upwards, the upper pressing plate 12 and the lower pressing plate 9 move upwards along with the upward movement, at the moment, the upper spring 14 and the lower spring 11 extend, the upper pressing rod 7 and the lower pressing rod 5 slowly leave the plastic film until the plastic film is completely separated, the plastic film is conveyed forwards, and sealing treatment is performed at the next sealing position of the plastic film.

Parts which are not specifically described in the above description are prior art or can be realized by the prior art. The specific embodiments of the present invention are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. That is, all equivalent changes and modifications made according to the content of the claims of the present invention should be regarded as the technical scope of the present invention.

Claims

1. The capper, its characterized in that: comprises that

The device comprises a rack, wherein the rack comprises a lower rack unit (1) and an upper rack unit, the upper rack unit comprises two supporting frames (2), and the two supporting frames (2) are respectively arranged at the left end and the right end of the lower rack unit (1);

the driving device (3), the driving device (3) is installed on the lower rack unit (1);

the lower sealing unit comprises a lower cross rod (4) and a lower pressing rod (5), the lower cross rod (4) is installed on the upper surface of the lower rack unit (1), a lower heating part is arranged on the lower cross rod (4), the lower pressing rod (5) is positioned right above the lower cross rod (4), and the lower sealing unit is driven by a driving device (3) to move up and down relative to the left and right supporting frames (2) and is used for pressing a plastic film on the lower heating part downwards;

an upper sealing unit; the upper sealing unit is positioned above the lower sealing unit and comprises an upper cross rod (6) and an upper pressure rod (7), two ends of the upper cross rod (6) are respectively installed on the left supporting frame and the right supporting frame (2), an upper heating component is arranged at the top of the lower cross rod (4), the upper pressure rod (7) is positioned right above the upper cross rod (6), and the upper supporting frame (2) is driven by a driving device (3) to move up and down relatively left and right so as to downwards press a plastic film positioned on the upper heating component.

2. The capper of claim 1 wherein: the device is characterized by further comprising two pull rods (8) which are vertically arranged, wherein the two pull rods (8) respectively penetrate through the left support frame (2), the right support frame (2) and the lower rack unit (1) to be connected with the driving device (3) and are driven by the driving device (3) to move up and down, two ends of the lower pressing rod (5) and two ends of the upper pressing rod (7) are respectively connected with the two pull rods (8), and the lower pressing rod (5) and the upper pressing rod (7) move up and down synchronously along with the up and down movement of the pull rods (8).

3. The capper of claim 2 wherein: the device also comprises a lower buffer device and an upper buffer device;

the lower buffer device comprises a left lower buffer unit, a right lower buffer unit and a lower pressing plate (9), the lower buffer unit comprises a lower sliding block (10) and a lower spring (11), the lower sliding block (10) is sleeved on the pull rod (8) and can slide up and down on the pull rod (8), the lower pressing rod (5) is connected with the lower sliding block (10), the lower pressing plate (9) is arranged on the pull rod (8) in a non-sliding manner, and two ends of the lower spring (11) are respectively connected with the lower sliding block (10) and the lower pressing plate (9);

go up buffer and upper press plate (12) including controlling two, go up buffer and include last sliding block (13) and go up spring (14), go up sliding block (13) cover and establish on the upper portion of pull rod (8) and can slide from top to bottom relatively pull rod (8), go up depression bar (7) and be connected with last sliding block (13), upper press plate (12) do not have to slide ground and set up on pull rod (8), upper slide (13) and upper press plate (12) are connected respectively to the upper and lower both ends of going up spring (14).

4. The capper of claim 3 wherein: the device also comprises a lower guide rod (15) and an upper guide rod (16);

the lower guide rod (15) penetrates through the lower sliding block (10) and the lower pressing plate (9) simultaneously, a first upper fixing piece is arranged at the top end of the lower guide rod (15) and above the lower pressing plate (9), a first lower fixing piece is arranged at the bottom end of the lower guide rod (15) and below the lower sliding block (10), the lower spring (11) is sleeved on the lower guide rod (15), and the upper spring (14) contracts or extends along with the downward or upward movement of the pull rod (8);

the upper guide rod (16) penetrates through the upper sliding block (13) and the upper pressing plate (12) simultaneously, a second upper fixing piece is arranged above the upper pressing plate (12) at the top end of the upper guide rod (16), a second lower fixing piece is arranged below the upper sliding block (13) at the bottom end of the upper guide rod (16), the upper guide rod (16) is sleeved with an upper spring (14), and the upper spring (14) contracts or extends along with the downward or upward movement of the pull rod (8).

5. The capper of claim 4 wherein: a lower threaded section (17) and an upper threaded section (18) are arranged on the pull rod (8);

the lower pressing plate (9) is arranged on the lower threaded section (17), and the upper side and the lower side of the lower pressing plate (9) are respectively provided with a lower fixing nut (19) in threaded fit with the lower threaded section (17) and used for installing the lower pressing plate (9) on the pull rod (8);

the upper pressure plate (12) is arranged on the upper threaded section (18), and the upper side and the lower side of the upper pressure plate (12) are respectively provided with an upper fixing nut (20) which is in threaded fit with the upper threaded section (18) and is used for installing the upper pressure plate (12) on the pull rod (8).

6. The capper of any of claims 1 to 5 wherein: the driving device (3) is two detachable cylinders which are arranged at the left end and the right end of the lower frame unit (1), piston rods of the two cylinders are respectively connected with the bottom ends of the two pull rods (8), and the piston rods of the cylinders are telescopic and used for driving the pull rods (8) to move up and down.

7. The capper of any of claims 1 to 5 wherein: the device also comprises two lower conveying rollers (21) and two upper conveying rollers (22);

two ends of the two lower conveying rollers (21) are respectively and rotatably connected with the lower parts of the two supporting frames (2), and the two lower conveying rollers (21) are respectively positioned at the front side and the rear side of the lower cross rod (4);

two ends of the two upper conveying rollers (22) are respectively connected with the upper parts of the two supporting frames (2) in a rotating way, and the two upper conveying rollers (22) are respectively positioned at the front side and the rear side of the upper cross rod (6).

8. The capper of claim 7 wherein: the front side and the rear side of each supporting frame (2) are respectively and fixedly provided with a supporting plate (23), and the upper conveying rollers (22) are rotatably connected with the supporting plates (23).

9. The capper of claim 7 wherein: the left and right ends of the lower conveying roller (21) are respectively provided with a lower limiting ring (24), and the left and right ends of the upper conveying roller (22) are respectively provided with an upper limiting ring (25).