CN214733165U - Paper rewinding machine with adjustable length - Google Patents

Abstract

The utility model relates to a rewinding machine field discloses a length adjustable paper rewinding machine, the on-line screen storage device comprises a base, the rectangle slide opening has been seted up to one side of base, slidable mounting has two rectangle slides, two in the rectangle slide opening one side of keeping away from each other of rectangle slide all extends to outside the rectangle slide opening, two the thread groove has all been seted up to one side that the rectangle slide is close to each other, two equal threaded mounting has the screw thread post, two in the thread groove the screw thread of screw thread post is revolved to opposite setting, two the one end that the screw thread post is close to each other extends to corresponding respectively outside the thread groove. The utility model has the advantages of it is following and effect: according to the width of paper, be convenient for adjust the length of rewinding roller, be convenient for utilize the rewinding roller to carry out rewinding work to the paper of different width, excellent in use effect, the simple operation does not need the staff to change the rewinding roller, reduces staff's the amount of labour, labour saving and time saving.

Description

Paper rewinding machine with adjustable length

Technical Field

The utility model relates to a rewinding machine technical field, in particular to paper rewinding machine of adjustable length.

Background

The rewinding machine is a special device for paper, mica tapes and films, and is used for sequentially rewinding paper produced by a paper machine, and the paper is rewound to form finished paper and leaves a factory.

Among the prior art, paper rewinding machine commonly used is when using, and the length of the rewinding roller of installation on the paper rewinding machine is fixed unchangeable, can not adjust the length of rewinding roller as required, when carrying out the rewinding to the paper of different width, needs the staff to dismantle and change the rewinding roller, leads to staff's the increase of the amount of labour, and the operation process is wasted time and energy.

Therefore, there is a need to design a paper rewinding machine which can conveniently adjust the length of the rewinding roller according to the width of the paper without replacing the rewinding roller.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a length adjustable paper rewinding machine has and is convenient for adjust the length of rewinding roller, is convenient for utilize the rewinding roller to carry out rewinding work to the paper of different width, excellent in use effect, the simple operation does not need the staff to change the rewinding roller, reduces staff's the amount of labour, labour saving and time saving's effect.

The above technical purpose of the present invention can be achieved by the following technical solutions: a paper rewinding machine with adjustable length comprises a base, wherein a rectangular sliding hole is formed in one side of the base, two rectangular sliding plates are slidably mounted in the rectangular sliding hole, the sides, far away from each other, of the two rectangular sliding plates extend out of the rectangular sliding hole, thread grooves are formed in the sides, close to each other, of the two rectangular sliding plates, thread columns are mounted in the thread grooves in a threaded mode, the thread directions of the two thread columns are opposite, the ends, close to each other, of the two thread columns extend out of the corresponding thread grooves, two positioning plates are fixedly mounted in the rectangular sliding hole and located between the two rectangular sliding plates, positioning holes are formed in the sides, close to each other, of the two positioning plates, the ends, close to each other, of the two thread columns penetrate through the corresponding positioning holes respectively, and the end, close to each other, of the two thread columns is fixedly mounted with the same connecting shaft, the connecting shaft is fixedly sleeved with a driven bevel gear, the top of the base is fixedly provided with a first motor, the top inner wall of the rectangular sliding hole is provided with a round hole, a vertical shaft is installed in the round hole in a rotating mode, the bottom end of the vertical shaft extends to the outside of the round hole and is fixedly provided with a driving bevel gear, the driving bevel gear is meshed with the driven bevel gear, the output shaft end of the first motor extends into the round hole and is fixedly connected with the top end of the vertical shaft, the tops of the two rectangular sliding plates are both fixedly provided with vertical plates positioned outside the rectangular sliding hole, one sides of the two vertical plates close to each other are both provided with mounting holes, two mounting holes are both rotatably provided with rotating shafts, the two ends of each rotating shaft extend to the outside of the mounting holes, one side of one vertical plate of the two vertical plates is fixedly provided with a second motor, and one end of one rotating shaft of the two rotating shafts is fixedly connected with the output shaft end of the second motor, one end of each of the two rotating shafts, which is close to each other, is fixedly provided with the same rewinding roller, and one side of each of the two vertical plates, which is close to each other, is fixedly provided with the same guide roller.

By adopting the technical scheme, the two threaded columns and the connecting shaft can be controlled to rotate simultaneously by utilizing the meshing transmission action of the driving bevel gear and the driven bevel gear, the distance between the two rectangular sliding plates can be adjusted under the action of opposite thread turning directions of the two threaded columns, the rewinding roller is driven to rotate by utilizing the second motor, the rewinding work can be carried out on the produced paper, and the guiding effect is played in the rewinding process of the paper by utilizing the guide roller.

The utility model discloses a further set up to: the rewinding roller comprises a first rewinding branch roller, a sliding roller and a second rewinding branch roller, one end, far away from each other, of the first rewinding branch roller and one end, far away from each other, of the second rewinding branch roller are fixedly connected with one end, corresponding to the rotating shaft, of the corresponding rotating shaft respectively, one end of the sliding roller is fixedly connected with one end of the first rewinding branch roller, a mounting groove is formed in one end, close to the first rewinding branch roller, of the second rewinding branch roller, and one end, far away from the first rewinding branch roller, of the sliding roller is slidably mounted in the mounting groove.

By adopting the technical scheme, the distance between the first rewinding branch roller and the second rewinding branch roller can be adjusted by utilizing the sliding fit of the sliding roller in the mounting groove, so that the length of the rewinding roller can be adjusted.

The utility model discloses a further set up to: guide grooves are formed in the inner wall of the top of the mounting groove and the inner wall of the bottom of the mounting groove, guide columns are fixedly mounted at the top and the bottom of the sliding roller respectively, and the guide columns are slidably mounted in the corresponding guide grooves respectively.

Through adopting above-mentioned technical scheme, utilize the sliding fit of guide post in the guide way, play the effect of leading to the slip direction of sliding roller to can control first rewinding branch roller, sliding roller and second rewinding branch roller and carry out synchronous rotation.

The utility model discloses a further set up to: the guide roll includes first direction journal roll, second direction journal roll and third direction journal roll, first direction journal roll with the one end that third direction journal roll was kept away from each other respectively with corresponding one side fixed connection of riser, the one end of second direction journal roll with the one end fixed connection of first direction journal roll, third direction journal roll is close to the spout has been seted up to the one end of first direction journal roll, the one end slidable mounting that first direction journal roll was kept away from to second direction journal roll is in the spout.

Through adopting above-mentioned technical scheme, utilize the sliding fit of second direction branch roller in the spout, can adjust the interval between first direction branch roller and the third direction branch roller to can realize adjusting the length of guide roll.

The utility model discloses a further set up to: two the equal fixed mounting in bottom of rectangle slide has a plurality of gyro wheels, and is a plurality of the gyro wheel is equidistant arranging.

Through adopting above-mentioned technical scheme, utilize a plurality of gyro wheels, play the effect of effectively supporting the rectangle slide to the rectangle slide is at the slip in-process, and the rectangle slide can drive a plurality of gyro wheels and roll subaerial, makes the rectangle slide more smooth and easy.

The utility model discloses a further set up to: two limiting grooves are formed in the inner wall of the top of the rectangular sliding hole and the inner wall of the bottom of the rectangular sliding hole, limiting rods are fixedly mounted at the top and the bottom of the rectangular sliding plate, and the four limiting rods are slidably mounted in the corresponding limiting grooves respectively.

Through adopting above-mentioned technical scheme, utilize four gag lever posts to slide respectively in corresponding spacing groove, play and carry out spacing effect to the slip stroke of two rectangle slides.

The utility model discloses a further set up to: two all fixed cover is equipped with first bearing, two on the screw thread post the outer lane of first bearing respectively with corresponding the inner wall fixed connection of locating hole, fixed cover is equipped with the second bearing on the vertical axis, the outer lane of second bearing with the inner wall fixed connection of round hole, two all fixed cover is equipped with the third bearing in the pivot, two the outer lane of third bearing respectively with corresponding the inner wall fixed connection of mounting hole.

Through adopting above-mentioned technical scheme, set up two first bearings, play the effect that the mounted position to two screw thread posts supported and was fixed a position, make two screw thread posts and connecting axle can steadily rotate, set up the second bearing, play the effect that supports and fix a position the mounted position of vertical axis, make the vertical axis can smoothly rotate in the round hole, set up two third bearings, play the effect that supports and fix a position the mounted position of two pivots, make two pivots can smoothly rotate in corresponding mounting hole.

The utility model has the advantages that:

1. the utility model discloses a pass the top of guide roll to the paper, again around rolling up on the rewinding roller the paper, start the second motor, steerable two pivots and rewinding roller rotate, can carry out the rewinding work to the paper, utilize the guide roll, play the effect of leading to paper rewinding in-process.

2. The utility model discloses a start first motor corotation, under the meshing transmission effect of initiative bevel gear and driven bevel gear, steerable connecting axle and two screw thread post rotate in step, make two rectangle slides remove to the direction of keeping away from each other, two rectangle slides drive corresponding riser and corresponding pivot and remove, interval between two risers is crescent, two risers drive first direction journal roller and third direction journal roller respectively and remove, the outside direction of second direction journal roller slides to the spout, two pivots drive first rewinding journal roller and second rewinding journal roller respectively and remove, make the outside direction of slide roll to the mounting groove slide, thereby the length crescent of steerable rewinding roller and guide roll, thereby utilize rewinding roller and guide roll can carry out the rewinding work to the paper of broad.

3. The utility model discloses a start first motor reversal, steerable connecting axle and two screw thread post rotate in step, make two rectangle slides to the direction that is close to each other and remove, make the interval between two risers reduce gradually, make the direction of second direction journal roller in to the spout slide, make the slide roll slide to the direction in the mounting groove, thereby the length of steerable rewinding roller and guide roll reduces gradually, thereby utilize rewinding roller and guide roll can carry out rewinding work to narrower paper, thereby be convenient for adjust the length of rewinding roller, be convenient for utilize the paper of different width to carry out rewinding work to the roller, excellent in use effect, the simple operation, do not need the staff to change the roller, reduce staff's the amount of labour, time saving and labor saving.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

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

Fig. 2 is a front sectional structural view of the present embodiment.

Fig. 3 is an enlarged schematic view of a portion a of fig. 2.

Fig. 4 is an enlarged schematic structural view of a portion B in fig. 2.

Fig. 5 is a front sectional structural view of the guide roller.

In the figure, 1, a base; 2. a rectangular slide hole; 3. a rectangular slide plate; 4. a thread groove; 5. a threaded post; 6. positioning a plate; 7. a connecting shaft; 8. a driven bevel gear; 9. a first motor; 10. a vertical axis; 11. a driving bevel gear; 12. a vertical plate; 13. a rotating shaft; 14. a second motor; 15. rewinding rollers; 16. a guide roller; 17. a first rewinding roller; 18. a slide roller; 19. a second rewinding branch roller; 20. mounting grooves; 21. a first guide backup roller; 22. a second guide backup roller; 23. a third guide backup roller; 24. a chute; 25. and a roller.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the specific embodiments. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the utility model provides a paper rewinding machine with adjustable length, including: the base comprises a base 1, wherein one side of the base 1 is provided with a rectangular sliding hole 2, two rectangular sliding plates 3 are slidably mounted in the rectangular sliding hole 2, the sides, far away from each other, of the two rectangular sliding plates 3 extend out of the rectangular sliding hole 2, the sides, near to each other, of the two rectangular sliding plates 3 are provided with thread grooves 4, thread columns 5 are threadedly mounted in the thread grooves 4, the thread directions of the thread columns 5 are oppositely arranged, the ends, near to each other, of the two thread columns 5 extend out of the corresponding thread grooves 4, two positioning plates 6 are fixedly mounted in the rectangular sliding hole 2, the two positioning plates 6 are positioned between the two rectangular sliding plates 3, the sides, near to each other, of the two positioning plates 6 are provided with positioning holes, the ends, near to each other, of the two thread columns 5 penetrate through the corresponding positioning holes respectively, and the end, near to each other, of the two thread columns 5 is fixedly mounted with a same connecting shaft 7, a driven bevel gear 8 is fixedly sleeved on the connecting shaft 7, a first motor 9 is fixedly installed at the top of the base 1, a round hole is formed in the inner wall of the top of the rectangular sliding hole 2, a vertical shaft 10 is rotatably installed in the round hole, the bottom end of the vertical shaft 10 extends out of the round hole and is fixedly installed with a driving bevel gear 11, the driving bevel gear 11 is meshed with the driven bevel gear 8, the output shaft end of the first motor 9 extends into the round hole and is fixedly connected with the top end of the vertical shaft 10, vertical plates 12 positioned out of the rectangular sliding hole 2 are fixedly installed at the tops of the two rectangular sliding plates 3, mounting holes are formed in the sides, close to each other, of the two vertical plates 12, rotating shafts 13 are rotatably installed in the two mounting holes, the two ends of the rotating shafts 13 extend out of the mounting holes, a second motor 14 is fixedly installed at one side of one vertical plate 12 of the two vertical plates 12, and one end of one rotating shaft 13 of the two rotating shafts 13 is fixedly connected with the output shaft of the second motor 14, the same rewinding roller 15 is fixedly mounted at the end, close to each other, of each of the two rotating shafts 13, and the same guide roller 16 is fixedly mounted at the side, close to each other, of each of the two vertical plates 12.

Referring to fig. 2 and 4, specifically, the rewinding roller 15 includes a first rewinding branch roller 17, a sliding roller 18 and a second rewinding branch roller 19, ends of the first rewinding branch roller 17 and the second rewinding branch roller 19, which are far away from each other, are respectively and fixedly connected with one end of the corresponding rotating shaft 13, one end of the sliding roller 18 is fixedly connected with one end of the first rewinding branch roller 17, one end of the second rewinding branch roller 19, which is close to the first rewinding branch roller 17, is provided with a mounting groove 20, and one end of the sliding roller 18, which is far away from the first rewinding branch roller 17, is slidably mounted in the mounting groove 20.

Specifically, the guide grooves are formed in the inner wall of the top of the mounting groove 20 and the inner wall of the bottom of the mounting groove, the guide columns are fixedly mounted at the top and the bottom of the sliding roller 18, and the two guide columns are slidably mounted in the corresponding guide grooves respectively.

Referring to fig. 2 and 5, specifically, the guide roller 16 includes a first guide support roller 21, a second guide support roller 22 and a third guide support roller 23, ends of the first guide support roller 21 and the third guide support roller 23, which are away from each other, are respectively and fixedly connected to one side of the corresponding vertical plate 12, one end of the second guide support roller 22 is fixedly connected to one end of the first guide support roller 21, a sliding groove 24 is formed at one end of the third guide support roller 23, which is close to the first guide support roller 21, and one end of the second guide support roller 22, which is away from the first guide support roller 21, is slidably mounted in the sliding groove 24.

Specifically, the bottom of two rectangle slides 3 all fixed mounting have a plurality of gyro wheels 25, and a plurality of gyro wheels 25 are equidistant arranging.

Specifically, two limiting grooves are formed in the inner wall of the top of the rectangular sliding hole 2 and the inner wall of the bottom of the rectangular sliding hole, limiting rods are fixedly mounted at the tops and the bottoms of the two rectangular sliding plates 3, and the four limiting rods are slidably mounted in the corresponding limiting grooves respectively.

Specifically, all fixed cover is equipped with first bearing on two screw thread posts 5, the outer lane of two first bearings respectively with the inner wall fixed connection of corresponding locating hole, fixed cover is equipped with the second bearing on the vertical axis 10, the outer lane of second bearing and the inner wall fixed connection of round hole, all fixed cover is equipped with the third bearing on two pivots 13, the outer lane of two third bearings respectively with the inner wall fixed connection of corresponding mounting hole.

Specifically, a control switch and an external power line are installed on the base 1, the first motor 9, the second motor 14, the control switch and the external power line are sequentially connected through a wire in an electric mode to form a loop, the first motor 9 is a motor capable of rotating forward and backward, the second motor 14 is a low-speed motor, the control switch can control starting and stopping and resetting of the first motor 9, and the control switch can also control starting and stopping of the second motor 14.

The working principle is as follows: the produced paper passes through the upper part of the guide roller 16, then the paper is wound on the rewinding roller 15, then the second motor 14 is started, the second motor 14 drives the two rotating shafts 13 and the rewinding roller 15 to rotate, the paper can be rewound, the guide roller 16 is utilized to play a role in guiding the paper in the rewinding process, after the paper rewinding work is completed, the second motor 14 stops working, the first motor 9 is started to rotate positively, the first motor 9 drives the vertical shaft 10 and the driving bevel gear 11 to rotate, under the meshing transmission action of the driving bevel gear 11 and the driven bevel gear 8, the connecting shaft 7 and the two threaded columns 5 synchronously rotate, because the two threaded columns 5 are respectively in threaded connection and match with the corresponding threaded grooves 4, the two rectangular sliding plates 3 move towards the directions far away from each other, the two rectangular sliding plates 3 drive the corresponding rollers 25 to roll on the ground, the two rectangular sliding plates 3 drive the corresponding limiting rods to slide in the corresponding limiting grooves, the two rectangular sliding plates 3 drive the corresponding vertical plates 12 and the corresponding rotating shafts 13 to move, so that the distance between the two vertical plates 12 is gradually increased, the two vertical plates 12 respectively drive the first guide support roller 21 and the third guide support roller 23 to move, the second guide support roller 22 slides towards the direction outside the sliding groove 24, the two rotating shafts 13 respectively drive the first rewinding support roller 17 and the second rewinding support roller 19 to move, so that the sliding roller 18 slides towards the direction outside the mounting groove 20, the sliding roller 18 drives the two guide posts to respectively slide in the corresponding guide grooves, so that the lengths of the rewinding roller 15 and the guide roller 16 are gradually increased, when the rewinding roller 15 and the guide roller 16 are adjusted to the proper lengths according to the width of paper, the first motor 9 stops working, so that the rewinding roller 15 and the guide roller 16 can rewind wider paper, by starting the first motor 9 to rotate reversely, the first motor 9 drives the vertical shaft 10 and the driving bevel gear 11 to rotate in opposite directions, under the meshing transmission action of the driving bevel gear 11 and the driven bevel gear 8, the connecting shaft 7 and the two threaded columns 5 synchronously rotate, so that the two rectangular sliding plates 3 move towards directions close to each other, the two rectangular sliding plates 3 drive the corresponding rollers 25 to roll on the ground, the two rectangular sliding plates 3 drive the corresponding vertical plates 12 and the corresponding rotating shafts 13 to move, so that the distance between the two vertical plates 12 is gradually reduced, the two vertical plates 12 respectively drive the first guide support roller 21 and the third guide support roller 23 to move, the second guide support roller 22 slides towards the direction in the sliding groove 24, the two rotating shafts 13 respectively drive the first rewinding support roller 17 and the second rewinding support roller 19 to move, so that the sliding roller 18 slides towards the direction in the mounting groove 20, thereby make rewinding roller 15 and guide roll 16's length reduce gradually, when rewinding roller 15 and guide roll 16's length adjustment is suitable, stop first motor 9 work, thereby utilize rewinding roller 15 and guide roll 16 can carry out the rewinding work to narrower paper, thereby be convenient for adjust rewinding roller 15's length, be convenient for utilize rewinding roller 15 to carry out the rewinding work to the paper of different width, excellent in use effect, the simple operation, do not need staff to change rewinding roller 15, reduce staff's the amount of labour, time saving and labor saving.

It is right above the utility model provides a length-adjustable's paper rewinding machine has introduced in detail. The principles and embodiments of the present invention have been explained herein using specific embodiments, which are merely used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (7)

1. The paper rewinding machine with the adjustable length is characterized by comprising a base (1), wherein one side of the base (1) is provided with a rectangular sliding hole (2), two rectangular sliding plates (3) are arranged in the rectangular sliding hole (2) in a sliding manner, one sides, far away from each other, of the two rectangular sliding plates (3) extend out of the rectangular sliding hole (2), one sides, close to each other, of the two rectangular sliding plates (3) are provided with thread grooves (4), thread columns (5) are arranged in the two thread grooves (4) in a threaded manner, the thread rotating directions of the two thread columns (5) are opposite, one ends, close to each other, of the two thread columns (5) extend out of the corresponding thread grooves (4), two positioning plates (6) are fixedly arranged in the rectangular sliding hole (2), and the two positioning plates (6) are positioned between the two rectangular sliding plates (3), two one side that locating plate (6) are close to each other has all been seted up the locating hole, two the one end that threaded post (5) are close to each other runs through correspondingly respectively the locating hole, two one end fixed mounting that threaded post (5) are close to each other has same connecting axle (7), fixed cover is equipped with driven bevel gear (8) on connecting axle (7), the top fixed mounting of base (1) has first motor (9), the round hole has been seted up on the top inner wall of rectangle slide opening (2), vertical axis (10) are installed to the round hole internal rotation, the bottom of vertical axis (10) extends to outside the round hole and fixed mounting have initiative bevel gear (11), initiative bevel gear (11) with driven bevel gear (8) mesh mutually, the output shaft end of first motor (9) extend to in the round hole and with the top fixed connection of vertical axis (10), two the equal fixed mounting in top of rectangle slide (3) is located riser (12) outside rectangle slide (2), two the mounting hole has all been seted up to one side that riser (12) are close to each other, two all rotate in the mounting hole and install pivot (13), the both ends of pivot (13) all extend to outside the mounting hole, two one side fixed mounting of a riser (12) in riser (12) has second motor (14), two the one end of a pivot (13) in pivot (13) with the output shaft fixed connection of second motor (14), two the one end fixed mounting that pivot (13) are close to each other has same rewinding roller (15), two one side fixed mounting that riser (12) are close to each other has same direction roller (16).

2. The adjustable-length paper rewinding machine as claimed in claim 1, characterized in that: the rewinding roller (15) comprises a first rewinding branch roller (17), a sliding roller (18) and a second rewinding branch roller (19), one end, far away from each other, of each of the first rewinding branch roller (17) and the second rewinding branch roller (19) is fixedly connected with one end, corresponding to the rotating shaft (13), of each of the first rewinding branch roller (17) and the second rewinding branch roller (19), one end of each of the sliding rollers (18) is fixedly connected with one end of each of the first rewinding branch rollers (17), one end, close to the first rewinding branch roller (17), of each of the second rewinding branch rollers (19) is provided with a mounting groove (20), and one end, far away from the first rewinding branch roller (17), of each of the sliding rollers (18) is slidably mounted in the mounting groove (20).

3. The adjustable-length paper rewinding machine as claimed in claim 2, characterized in that: guide grooves are formed in the inner wall of the top of the mounting groove (20) and the inner wall of the bottom of the mounting groove, guide columns are fixedly mounted at the top and the bottom of the sliding roller (18), and the two guide columns are slidably mounted in the corresponding guide grooves respectively.

4. The adjustable-length paper rewinding machine as claimed in claim 1, characterized in that: guide roll (16) include first direction branch roller (21), second direction branch roller (22) and third direction branch roller (23), first direction branch roller (21) with the one end that third direction branch roller (23) kept away from each other respectively with corresponding one side fixed connection of riser (12), the one end of second direction branch roller (22) with the one end fixed connection of first direction branch roller (21), third direction branch roller (23) are close to spout (24) have been seted up to the one end of first direction branch roller (21), the one end slidable mounting that first direction branch roller (21) was kept away from to second direction branch roller (22) is in spout (24).

5. The adjustable-length paper rewinding machine as claimed in claim 1, characterized in that: the bottom of two rectangle slide (3) all fixed mounting have a plurality of gyro wheels (25), and is a plurality of gyro wheel (25) are equidistant arranging.

6. The adjustable-length paper rewinding machine as claimed in claim 1, characterized in that: two limiting grooves are formed in the inner wall of the top of the rectangular sliding hole (2) and the inner wall of the bottom of the rectangular sliding hole, limiting rods are fixedly mounted at the top and the bottom of the rectangular sliding plate (3), and the four limiting rods are slidably mounted in the corresponding limiting grooves respectively.

7. The adjustable-length paper rewinding machine as claimed in claim 1, characterized in that: two all fixed cover is equipped with first bearing, two on screw thread post (5) the outer lane of first bearing respectively with corresponding the inner wall fixed connection of locating hole, fixed cover is equipped with the second bearing on vertical axis (10), the outer lane of second bearing with the inner wall fixed connection of round hole, two all fixed cover is equipped with the third bearing on pivot (13), two the outer lane of third bearing respectively with corresponding the inner wall fixed connection of mounting hole.

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