CN113443333A

CN113443333A - Unpowered roller line

Info

Publication number: CN113443333A
Application number: CN202111023493.7A
Authority: CN
Inventors: 杨杰; 陈东亮; 关玉金; 刘连荣
Original assignee: Jiangsu Ivanol Intelligent Technology Co Ltd
Current assignee: Jiangsu Ivanol Intelligent Technology Co Ltd
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2021-09-28
Anticipated expiration: 2041-09-02
Also published as: CN113443333B

Abstract

The invention discloses an unpowered roller line, and relates to the technical field of logistics conveying. The rack comprises two first rack plates which are arranged in parallel, wherein one end of each first rack plate is provided with a second rack plate, and one end of each second rack plate, which is far away from the first rack plate, is provided with a third rack plate; a plurality of rollers are respectively and rotatably connected between the inner sides of the two first frame plates along the length direction of the first frame plates, between the inner sides of the two second frame plates along the length direction of the second frame plates and between the inner sides of the two third frame plates along the length direction of the third frame plates; the second frame plate is formed by sequentially splicing a straight line section I, an arc section II and a straight line section II; the arc section I is tangent to the straight line section I, the arc section II is tangent to the straight line section II, and the arc section I is also tangent to the arc section II; the top and the bottom of the straight line section I are respectively flush with the top and the bottom of the first frame plate.

Description

Unpowered roller line

Technical Field

The invention relates to the technical field of logistics conveying, in particular to an unpowered roller line.

Background

The unpowered roller line is a conveying device applied to an automatic assembly production line. The mechanical part mainly comprises a cylinder body, an inner shaft, a bearing and the like. It is usually located between two mechanisms, the front mechanism being used to deliver the article onto an unpowered roller line through which the article output can be transferred to the next mechanism.

The axes of the rollers on the existing unpowered roller line are usually in the same plane, and when the initial speed of outputting articles is high in the conveying process, the articles are inconvenient to decelerate and transit, so that the articles are easy to fall off from the roller line; when the initial speed of the output article is low, the roller can generate resistance in the conveying process, so that the transportation of the article is blocked, and the accumulation of the article is easily caused.

Disclosure of Invention

The invention aims to provide an unpowered roller line, which is used for reducing blockage and falling off during article conveying and facilitating conveying and transferring of articles.

In order to solve the technical problems, the invention provides the following technical scheme: an unpowered roller line comprises two first frame plates which are arranged in parallel, wherein one end of each first frame plate is provided with a second frame plate, and one end of each second frame plate, which is far away from the first frame plate, is provided with a third frame plate; a plurality of rollers are respectively and rotatably connected between the inner sides of the two first frame plates along the length direction of the first frame plates, between the inner sides of the two second frame plates along the length direction of the second frame plates and between the inner sides of the two third frame plates along the length direction of the third frame plates; the second frame plate is formed by sequentially splicing a straight line section I, an arc section II and a straight line section II; the arc section I is tangent to the straight line section I, the arc section II is tangent to the straight line section II, and the arc section I is also tangent to the arc section II; the top and the bottom of the straight line section I are respectively flush with the top and the bottom of the first frame plate, and the top and the bottom of the straight line section II are respectively flush with the top and the bottom of the third frame plate; a first connecting plate is connected between the two second frame plates, and a second connecting plate is arranged between the two third frame plates; the first connecting plate and the second connecting plate are arranged between two adjacent rollers between the second frame plate and the third frame plate; a rotating shaft is rotatably connected to the second frame plate, and one end, far away from the second frame plate, of the rotating shaft is fixedly connected with the first connecting plate; each second frame plate is connected with a first splicing mechanism between the adjacent first frame plate, and each second frame plate is connected with a second splicing mechanism between the adjacent third frame plate; a supporting plate is arranged below the two first frame plates together, and a lifting mechanism is arranged between the supporting plate and the two first frame plates; a plurality of first supporting legs are uniformly distributed at the top of the supporting plate; each the bottom of third frame plate is equipped with the second landing leg respectively.

Furthermore, the outside of each first frame plate, each second frame plate and each third frame plate is equipped with U type groove along length direction respectively.

Further, the first splicing mechanism comprises a first linear guide rail, and the first linear guide rail is arranged in a U-shaped groove on the outer side of the first frame plate; a first limiting block is arranged on the first linear guide rail, and a first limiting hole is formed in the first limiting block; a first mounting hole is formed in the second frame plate and penetrates through the U-shaped groove in the outer side of the second frame plate; a first fastening screw is connected between the second frame plate and a first limiting block on one side of the second frame plate, the first fastening screw penetrates through the first mounting hole and the first limiting hole, and a first fastening nut matched with the first fastening screw is sleeved outside the first fastening screw; the top of the first fastening nut is in contact with the bottom of the second frame plate.

Further, the second splicing mechanism comprises a second linear guide rail, and the second linear guide rail is arranged in a U-shaped groove on the outer side of the straight line section II; a second limiting block is arranged on the second linear guide rail, and a second limiting hole is formed in the second limiting block; a second mounting hole is formed in the third frame plate and penetrates through the U-shaped groove in the outer side of the first frame plate; a second fastening screw is connected between the third frame plate and a second limiting block on one side of the third frame plate, the second fastening screw penetrates through the second mounting hole and the second limiting hole, and a second fastening nut matched with the second fastening screw is sleeved outside the second fastening screw; the top of the second fastening nut is in contact with the bottom of the third frame plate.

Furthermore, the lifting mechanism comprises support blocks arranged in U-shaped grooves on the outer sides of the two first frame plates, a third mounting hole is formed in each support block, a support stud penetrates through each third mounting hole, and the bottom end of each support stud is fixed on the support plate; and a pair of third fastening nuts are respectively sleeved outside each support stud, and one side, opposite to each pair of third fastening nuts, is respectively contacted with the top and the bottom of the corresponding support block.

Further, the distances from the top and the bottom of the straight line section II to the axis of the rotating shaft are equal.

Further, the distance from the top surface of the support plate to the axis of the rotating shaft is equal to the distance from the top surface of the straight line section I to the axis of the rotating shaft.

Furthermore, a first fixing plate is vertically arranged on the first supporting leg, a first adjusting stud is connected in the first fixing plate in a matched mode through threads, and a first supporting seat used for being in contact with the ground is arranged at the bottom end of the first adjusting stud.

Furthermore, a second fixing plate is vertically arranged on the second supporting leg, a second adjusting stud is connected in the second fixing plate in a matched mode through threads, and a second supporting seat used for being in contact with the ground is arranged at the bottom end of the second adjusting stud.

Compared with the prior art, the invention has the following beneficial effects.

1. Through the setting of second frame plate and upper roller, when carrying article from the roller on first frame plate to the third frame plate, be convenient for form the transition, can realize certain acceleration to article, help reducing card among the article transportation process and pause, pile up.

2. The novel article conveying device is provided with a first splicing mechanism, a second splicing mechanism, a lifting mechanism and the like, is used for adjusting the positions of the first frame plate and the angle of the second frame plate, is convenient for forming another transition, can realize the speed reduction effect on articles, and is beneficial to reducing falling and flying off of the articles caused by overlarge output speed.

3. Because first frame plate and second frame plate are separable, consequently the during operation can use the part that second frame plate and third frame plate correspond, realizes the reduction of the whole length of drum line, is convenient for satisfy the demand that different distances were carried.

4. Through being equipped with first regulation double-screw bolt, first supporting seat, second regulation double-screw bolt and second supporting seat etc. this unpowered roller line of being convenient for is fixed subaerial after removing firmly.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

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

Fig. 2 is an installation schematic diagram of the first splicing mechanism and the second splicing mechanism of the invention.

Fig. 3 is an enlarged view of the structure of the area a in fig. 2 according to the present invention.

FIG. 4 is an enlarged view of the structure of the area B in FIG. 2 according to the present invention.

Fig. 5 is a schematic view of the installation of the first and second connection plates of the present invention.

Fig. 6 is a schematic view of a second deck structure of the present invention.

Fig. 7 is a schematic structural diagram of the lifting mechanism of the present invention.

Fig. 8 is a schematic view of the second stopper of the present invention.

Fig. 9 is a first leg mounting schematic of the present invention.

Fig. 10 is a schematic view of the second frame plate of the present invention after rotation adjustment.

Fig. 11 is an enlarged view of the structure of the region C in fig. 10 according to the present invention.

In the figure: 1. a first frame plate; 2. a second frame plate; 21. a straight line segment I; 22. an arc section I; 23. a circular arc section II; 24. a straight line segment II; 25. a first mounting hole; 26. a first connecting plate; 3. a third frame plate; 31. a second leg; 311. a second fixing plate; 3111. a second adjusting stud; 3112. a second support seat; 32. a second mounting hole; 33. a second connecting plate; 4. a first splicing mechanism; 41. a first linear guide rail; 42. a first stopper; 421. a first limit hole; 43. a first fastening screw; 44. a first fastening nut; 5. a second splicing mechanism; 51. a second linear guide; 52. a second limiting block; 521. a second limiting hole; 53. a second fastening screw; 54. a second fastening nut; 6. a lifting mechanism; 61. a support block; 611. a third mounting hole; 62. a support stud; 63. a third fastening nut; 7. a support plate; 71. a first leg; 711. a first fixing plate; 7111. a first adjusting stud; 7112. a first support base; 8. a drum; 9. a U-shaped groove; 10. a rotating shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 11, the present invention provides a technical solution: an unpowered roller line comprises two first frame plates 1 which are arranged in parallel, wherein one end of each first frame plate 1 is provided with a second frame plate 2, and one end of each second frame plate 2, which is far away from the first frame plate 1, is provided with a third frame plate 3; a plurality of rollers 8 are respectively and rotatably connected between the inner sides of the two first frame plates 1 along the length direction of the first frame plates 1, between the inner sides of the two second frame plates 2 along the length direction of the second frame plates 2 and between the inner sides of the two third frame plates 3 along the length direction of the third frame plates 3; the outside of each first frame plate 1, each second frame plate 2 and each third frame plate 3 is equipped with U type groove 9 respectively along length direction.

The second frame plate 2 is formed by sequentially splicing a straight line section I21, an arc section I22, an arc section II 23 and a straight line section II 24; the arc section I22 and the arc section II 23 are identical in structure and opposite in direction; the arc section I22 is tangent to the straight line section I21, the arc section II 23 is tangent to the straight line section II 24, and the arc section I22 is tangent to the arc section II 23; the top and the bottom of the straight line section I21 are respectively flush with the top and the bottom of the first frame plate 1, and the top and the bottom of the straight line section II 24 are respectively flush with the top and the bottom of the third frame plate 3; the straight line section I21 and the straight line section II 24 are not flush, and arc transition is formed by arranging the arc section I22 and the arc section II 23, so that articles can be conveyed conveniently. Under initial condition, straightway I21's height is higher than straightway II 24's height, uses this cylinder line to carry out certain acceleration effect to article from first frame plate 1 to third frame plate 3 when transporting article this moment, through the transition effect of second frame plate 2, realizes carrying out certain acceleration effect to article, is applicable to article and exports the condition that initial velocity is slow when cylinder 8 between the first frame plate 1, and the card of reducible transportation in-process article is piled up.

A first connecting plate 26 is connected between the two second frame plates 2, and a second connecting plate 33 is arranged between the two third frame plates 3; the first connecting plate 26 and the second connecting plate 33 are arranged between two adjacent rollers 8 between the second frame plate 2 and the third frame plate 3; a rotating shaft 10 is rotatably connected to the second frame plate 2, and one end of the rotating shaft 10 far away from the second frame plate 2 is fixedly connected with a first connecting plate 26; each second frame plate 2 is connected with first splicing mechanism 4 rather than between the adjacent first frame plate 1, and each second frame plate 2 is connected with second splicing mechanism 5 rather than between the adjacent third frame plate 3, and first splicing mechanism 4 is used for splicing first frame plate 1 and second frame plate 2, and the second concatenation is used for splicing second frame plate 2 and third frame plate 3. A supporting plate 7 is arranged below the two first frame plates 1 together, a lifting mechanism 6 is arranged between the supporting plate 7 and the two first frame plates 1, and the lifting mechanism 6 is used for adjusting the heights of the two first frame plates 1; a plurality of first supporting legs 71 are uniformly distributed at the top of the supporting plate 7; the bottom of each third shelf board 3 is equipped with second landing leg 31 respectively, and the quantity of the second landing leg 31 of each third shelf board 3 bottom is 2-3, and the universal wheel is installed to the bottom of each first landing leg 71 and each second landing leg 31, and the bottommost of each universal wheel is located the coplanar.

The lifting mechanism 6 comprises supporting blocks 61 arranged in U-shaped grooves 9 on the outer sides of the two first frame plates 1, each supporting block 61 is internally provided with a third mounting hole 611, each third mounting hole 611 is internally provided with a supporting stud 62 in a penetrating manner, and the bottom end of each supporting stud 62 is fixed on the supporting plate 7; a pair of third fastening nuts 63 is respectively sleeved outside each support stud 62, one side of each pair of third fastening nuts 63 is respectively contacted with the top and the bottom of the corresponding support block 61, and the positions of the support blocks 61 are respectively fixed through a plurality of pairs of third fastening nuts 63, so that the height of the two first frame plates 1 is adjusted and fixed.

The first splicing mechanism 4 comprises a first linear guide rail 41, and the first linear guide rail 41 is fixed in a U-shaped groove 9 on the outer side of the first frame plate 1; a first limiting block 42 is arranged on the first linear guide rail 41, and a first limiting hole 421 is formed in the first limiting block 42; a first mounting hole 25 is formed in the straight line section I21 of the second frame plate 2, and the first mounting hole 25 penetrates through the U-shaped groove 9 on the outer side of the second frame plate 2; a first fastening screw 43 is connected between the second frame plate 2 and the first limiting block 42 on one side of the second frame plate, the first fastening screw 43 passes through the first mounting hole 25 and the first limiting hole 421, and a first fastening nut 44 matched with the first fastening screw 43 is sleeved outside the first fastening screw 43; the top of the first fastening nut 44 contacts the bottom of the second frame plate 2; first splicing mechanism 4 is used for the concatenation and the separation of first frame plate 1 and second frame plate 2, when inserting first fastening screw 43 and first fastening nut 44 cooperation, fix two second frame plates 2 spacing, when unscrewing two first fastening nut 44, shift out two first fastening screw 43, owing to be provided with first straight line guide rail 41, first stopper 42 can move to the U type groove 9 in first frame plate 1 outside along first straight line guide rail 41 in, shift out in the U type groove 9 in first stopper 42 follow straightway I21 outside, can realize the complete separation of first frame plate 1 and second frame plate 2.

The second splicing mechanism 5 comprises a second linear guide rail 51, and the second linear guide rail 51 is arranged in the U-shaped groove 9 on the outer side of the straight line section II 24; a second limiting block 52 is arranged on the second linear guide rail 51, the second limiting block 52 can completely move into the U-shaped groove 9 on the outer side of the straight-line section II 24 along the second linear guide rail 51, and a second limiting hole 521 is formed in the second limiting block 52; a second mounting hole 32 is formed in the third frame plate 3, and the second mounting hole 32 penetrates through the U-shaped groove 9 in the outer side of the first frame plate 1; a second fastening screw 53 is connected between the third frame plate 3 and the second limiting block 52 on one side of the third frame plate, the second fastening screw 53 passes through the second mounting hole 32 and the second limiting hole 521, and a second fastening nut 54 matched with the second fastening screw 53 is sleeved outside the second fastening screw 53; the top of the second fastening nut 54 contacts the bottom of the third shelf plate 3; the second splicing mechanism 5 is used for fixing and limiting the positions of the two second frame plates 2, when the second fastening nut 54 is screwed out and the second fastening screw 53 is moved out, the second limiting block 52 is moved again, so that the second limiting block 52 is moved into the U-shaped groove 9 on the outer side of the straight-line section II 24, and the whole formed by the two second frame plates 2, the first connecting plate 26 and the roller 8 between the two second frame plates 2 can rotate due to the arrangement of the rotating shaft 10.

After the first fastening screws 43 and the first fastening nuts 44 are taken down and the first frame plates 1 and the second frame plates 2 are completely separated, the whole composed of the two second frame plates 2, the first connecting plate 26 and the roller 8 between the two second frame plates 2 is rotated by 180 degrees, the two second limiting blocks 52 are moved to be placed in the U-shaped grooves 9 in the two third frame plates 3 again, the second limiting holes 521 on the two second limiting blocks 52 correspond to the second mounting holes 32 on the two third frame plates 3, the two second fastening screws 53 are inserted again and the two second fastening nuts 54 are screwed, so that the position fixing of the two rotated second frame plates 2 can be completed, at the moment, the height of the straight line section I21 is lower than that of the straight line section II 24, then one upper part of each pair of the third fastening nuts 63 is screwed out, at the moment, the two first frame plates 1 can be moved out from the supporting studs 62 and moved out of the two first frame plates 1, the remaining third fastening nuts 63 are unscrewed, and finally the two first frame plates 1 are again placed between the support studs 62, and the support plate 7 is brought into supporting contact with the bottom of the first frame plate 1, since the distances from the top and bottom of the straight line section II 24 to the axis of the rotary shaft 10 are equal and the distance from the top surface of the support plate 7 to the axis of the rotary shaft 10 is equal to the distance from the top surface of the straight line section I21 to the axis of the rotary shaft 10, when the bottom of the first frame plate 1 contacts with the support plate 7, the end of the second frame plate 2 which is rotated by 180 degrees and is far away from the third frame plate 3 is just aligned with the end of the first frame plate 1, the first limiting block 42 is moved into the U-shaped groove 9 on the outer side of the straight line section i 21, so that the first limiting hole 421 corresponds to the first mounting hole 25, and finally, the first fastening screw 43 is inserted and the first fastening nut 44 is screwed, so that the first frame plate 1 and the second frame plate 2 are spliced and fixed again (the state after adjustment and fixation is shown in fig. 8). When the articles are conveyed from the first shelf board 1 to the third shelf board 3 and pass through the rollers 8 on the second shelf board 2, the articles can be decelerated, so that the article conveying device is suitable for the condition that the articles are discharged onto the rollers 8 between the two first shelf boards 1 at a higher speed, and the falling off of the articles in the conveying process caused by the excessively high article conveying speed can be reduced.

A first fixing plate 711 is vertically arranged on the first supporting leg 71, a first adjusting stud 7111 is connected in the first fixing plate 711 in a threaded fit manner, a first supporting seat 7112 used for being in contact with the ground is arranged at the bottom end of the first adjusting stud 7111, a second fixing plate 311 is vertically arranged on the second supporting leg 31, a second adjusting stud 3111 is connected in the second fixing plate 311 in a threaded fit manner, and a second supporting seat 3112 used for being in contact with the ground is arranged at the bottom end of the second adjusting stud 3111; by adjusting the first adjusting stud 7111 and the second adjusting stud 3111, the universal wheels at the bottom of each of the first leg 71 and the second leg 31 can be contacted with the ground or separated from the ground, so that the whole device can be moved and fixed.

The working principle is as follows: according to the unpowered roller line, the position adjustment of the first frame plate 1 and the second frame plate 2 is adopted, so that the acceleration and the deceleration of conveyed articles are convenient to realize, the acceleration is convenient to reduce the accumulation and blockage caused by slow article output speed, the deceleration is convenient to reduce the falling and other conditions caused by too fast article output speed, different conveying requirements can be met, the adjustment can be realized only by operating the first splicing mechanism 4, the second splicing mechanism 5 and the lifting mechanism 6, and the second frame plate 2 and a roller 8 thereon are rotated by 180 degrees and then fixed in position, so that the change from the acceleration effect to the deceleration effect can be realized; through first splicing mechanism 4, can separate first frame plate 1 and second frame plate 2 completely, consequently the during operation can only use the part that second frame plate 2 and third frame plate 3 correspond, realizes the reduction of the whole length of drum line, is convenient for satisfy the demand that different distances were carried.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

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

Claims

1. An unpowered roller line which is characterized in that: the rack comprises two first frame plates (1) which are arranged in parallel, wherein one end of each first frame plate (1) is provided with a second frame plate (2), and one end of each second frame plate (2) far away from the first frame plate (1) is provided with a third frame plate (3); a plurality of rollers (8) are respectively and rotatably connected between the inner sides of the two first frame plates (1) along the length direction of the first frame plates (1), between the inner sides of the two second frame plates (2) along the length direction of the second frame plates (2) and between the inner sides of the two third frame plates (3) along the length direction of the third frame plates (3); the second frame plate (2) is formed by sequentially splicing a straight line section I (21), an arc section I (22), an arc section II (23) and a straight line section II (24); the arc section I (22) is tangent to the straight line section I (21), the arc section II (23) is tangent to the straight line section II (24), and the arc section I (22) is also tangent to the arc section II (23); the top and the bottom of the straight line section I (21) are respectively flush with the top and the bottom of the first frame plate (1), and the top and the bottom of the straight line section II (24) are respectively flush with the top and the bottom of the third frame plate (3); a first connecting plate (26) is connected between the two second frame plates (2), and a second connecting plate (33) is arranged between the two third frame plates (3); the first connecting plate (26) and the second connecting plate (33) are arranged between two adjacent rollers (8) between the second frame plate (2) and the third frame plate (3); a rotating shaft (10) is rotatably connected to the second frame plate (2), and one end, far away from the second frame plate (2), of the rotating shaft (10) is fixedly connected with a first connecting plate (26); a first splicing mechanism (4) is connected between each second frame plate (2) and the adjacent first frame plate (1), and a second splicing mechanism (5) is connected between each second frame plate (2) and the adjacent third frame plate (3); a supporting plate (7) is arranged below the two first frame plates (1) together, and a lifting mechanism (6) is arranged between the supporting plate (7) and the two first frame plates (1); a plurality of first supporting legs (71) are uniformly distributed at the top of the supporting plate (7); and the bottom of each third frame plate (3) is provided with a second supporting leg (31) respectively.

2. An unpowered roller line according to claim 1, wherein: the outer side of each first frame plate (1), each second frame plate (2) and each third frame plate (3) is provided with a U-shaped groove (9) along the length direction.

3. An unpowered roller line according to claim 2, wherein: the first splicing mechanism (4) comprises a first linear guide rail (41), and the first linear guide rail (41) is arranged in a U-shaped groove (9) on the outer side of the first frame plate (1); a first limiting block (42) is arranged on the first linear guide rail (41), and a first limiting hole (421) is formed in the first limiting block (42); a first mounting hole (25) is formed in the second frame plate (2), and the first mounting hole (25) penetrates through a U-shaped groove (9) in the outer side of the second frame plate (2); a first fastening screw (43) is connected between the second frame plate (2) and the first limiting block (42) on one side of the second frame plate, the first fastening screw (43) penetrates through the first mounting hole (25) and the first limiting hole (421), and a first fastening nut (44) matched with the first fastening screw (43) is sleeved outside the first fastening screw (43); the top of the first fastening nut (44) is contacted with the bottom of the second frame plate (2).

4. An unpowered roller line according to claim 2, wherein: the second splicing mechanism (5) comprises a second linear guide rail (51), and the second linear guide rail (51) is arranged in a U-shaped groove (9) on the outer side of the straight line section II (24); a second limiting block (52) is arranged on the second linear guide rail (51), and a second limiting hole (521) is formed in the second limiting block (52); a second mounting hole (32) is formed in the third frame plate (3), and the second mounting hole (32) penetrates through the U-shaped groove (9) in the outer side of the first frame plate (1); a second fastening screw (53) is connected between the third frame plate (3) and a second limiting block (52) on one side of the third frame plate, the second fastening screw (53) penetrates through the second mounting hole (32) and the second limiting hole (521), and a second fastening nut (54) matched with the second fastening screw (53) is sleeved outside the second fastening screw (53); the top of the second fastening nut (54) is in contact with the bottom of the third frame plate (3).

5. An unpowered roller line according to claim 1, wherein: the lifting mechanism (6) comprises supporting blocks (61) arranged in U-shaped grooves (9) on the outer sides of the two first frame plates (1), each supporting block (61) is internally provided with a third mounting hole (611), each third mounting hole (611) is internally provided with a supporting stud (62) in a penetrating mode, and the bottom end of each supporting stud (62) is fixed on the corresponding supporting plate (7); a pair of third fastening nuts (63) is sleeved outside each support stud (62), and one side, opposite to each pair of third fastening nuts (63), is in contact with the top and the bottom of the corresponding support block (61) respectively.

6. An unpowered roller line according to claim 1, wherein: the distances from the top and the bottom of the straight line section II (24) to the axis of the rotating shaft (10) are equal.

7. An unpowered roller line according to claim 1, wherein: the distance from the top surface of the support plate (7) to the axis of the rotating shaft (10) is equal to the distance from the top surface of the straight line section I (21) to the axis of the rotating shaft (10).

8. An unpowered roller line according to claim 1, wherein: first fixed plate (711) are equipped with perpendicularly on first landing leg (71), be connected with first regulation double-screw bolt (7111) through screw-thread fit in first fixed plate (711), the bottom of first regulation double-screw bolt (7111) is equipped with first supporting seat (7112) that is used for with ground contact.

9. An unpowered roller line according to claim 1, wherein: perpendicular second fixed plate (311) that is equipped with on second landing leg (31), be connected with second regulation double-screw bolt (3111) through screw-thread fit in second fixed plate (311), the bottom of second regulation double-screw bolt (3111) is equipped with second supporting seat (3112) that are used for with ground contact.