CN219669121U - Crossing type lengthening roller way mechanism - Google Patents

Abstract

The utility model relates to the technical field of steel rail processing, in particular to a crossing type lengthening roller way mechanism. The utility model provides a crossing type lengthening roller way mechanism which comprises a first bracket, a second bracket, a plurality of guide rollers and a guide structure, wherein the second bracket is positioned at one side of the first bracket; at least one guide roller is respectively arranged on the first bracket and the second bracket; the guide structure is at least provided with one, and is arranged on the first bracket and/or the second bracket, the first bracket comprises a top frame, and a plurality of supporting legs are arranged on the lower surface of the top frame; the plurality of legs are divided into one or two columns along the length direction of the first bracket. The long rail piece can also cross the upsetter without moving the upsetter, and drilling and sawing of the long rail piece are completed, so that a large amount of time is saved, and the labor burden of workers is reduced.

Description

Crossing type lengthening roller way mechanism

Technical Field

The utility model relates to the technical field of steel rail processing, in particular to a crossing type lengthening roller way mechanism.

Background

The existing rail processing plant is characterized in that the space between the steel rail upsetter and the combined saw drilling machine is generally set according to the length of the short rail, the processing of the short rail is applicable, the long rail cannot be placed between the steel rail upsetter and the combined saw drilling machine, the long rail cannot be processed under the condition that existing equipment is not moved, the space between the steel rail upsetter and the combined saw drilling machine is adjusted, a great deal of time and effort are spent, and after a batch of long rail is processed, the steel rail upsetter and the combined saw drilling machine are required to be restored to the original position so as to adapt to the processing of the short rail.

Disclosure of Invention

The utility model solves the problems that: because the equipment field is limited, the distance between the steel rail upsetter and the combined saw drilling machine is small, the long rail part cannot be placed between the steel rail upsetter and the combined saw drilling machine, and the long rail part cannot be processed under the condition that the existing equipment is not moved.

(II) technical scheme

The spanned lengthening roller way mechanism comprises a first bracket, a second bracket, a plurality of guide rollers and a guide structure, wherein the second bracket is positioned at one side of the first bracket;

at least one guide roller is respectively arranged on the first bracket and the second bracket;

the guide structure is provided with at least one, and is mounted on the first bracket and/or the second bracket.

According to one embodiment of the utility model, the first bracket comprises a top frame, and a plurality of supporting legs are arranged on the lower surface of the top frame;

the support legs are divided into one row or two rows along the length direction of the first support, and each support leg is provided with a clamping opening structure.

According to one embodiment of the utility model, the nip structure comprises a first rail secured to a lower surface of the leg;

or, install adjusting structure on the first horizontal pole, through adjusting structure adjusts the landing leg with height between the first horizontal pole.

According to one embodiment of the utility model, the clamping structure further comprises a second cross rod, two first bolt rods and two fixing nuts, wherein the second cross rod is located right below the first cross rod, and the first cross rod and the second cross rod are connected through the first bolt rods and the fixing nuts.

According to one embodiment of the utility model, the adjusting structure comprises a first screw rod, a first nut and a second nut, wherein the first screw rod is vertically connected to the upper surface of the first cross rod, a first transverse plate is connected to the side surface of each supporting leg, the first screw rod penetrates through the first transverse plate, the first nut and the second nut are both in threaded connection with the first screw rod, and the first nut and the second nut are located on two sides of the first transverse plate.

According to one embodiment of the utility model, two ends of the first cross rod and the second cross rod are respectively provided with round holes for the first bolt rods to pass through, the two first bolt rods sequentially pass through the first cross rod and the second cross rod from top to bottom, and the two fixing nuts are respectively screwed to the lower ends of the first bolt rods.

According to one embodiment of the utility model, the guide roller comprises two fixed seats, a roller body is rotatably arranged between the two fixed seats, two limiting sheets are connected to the roller body, and the two limiting sheets are arranged at intervals.

According to one embodiment of the utility model, two first square steels are connected to the top frame, and the first square steels are installed along the length direction of the top frame;

the second support comprises two support frames, and two second square steels are arranged between the two support frames.

According to one embodiment of the utility model, the guide structure comprises a bottom plate, two mounting seats and two mounting structures, wherein the two mounting seats are fixed on the upper surface of the bottom plate and are arranged at intervals along the width direction of the bottom plate, and at least one guide wheel is rotatably mounted in each of the two mounting seats;

the two mounting structures are connected to the lower surface of the bottom plate, the two mounting structures are arranged at intervals along the width direction of the bottom plate, each mounting structure comprises a limiting plate and two second screws, the two second screws are fixed on the lower surface of the bottom plate, two through holes for the second screws to pass through are formed in the bottom plate, and nuts are screwed at the lower ends of the second screws.

According to one embodiment of the utility model, the two supporting frames comprise two vertical rods, a plurality of connecting rods are connected between the two vertical rods, the lower end of each vertical rod is fixedly connected with a second transverse plate, and the second transverse plates are arranged vertically to the vertical rods;

every all insert the third screw rod on the second diaphragm, the lower extreme of third screw rod all is connected with the backing plate, the spiro union has third nut and fourth nut on the third screw rod respectively, and the fourth nut is located the below of second diaphragm, the third nut is located the top of second diaphragm.

The utility model has the beneficial effects that:

the utility model provides a crossing type lengthening roller way mechanism, which comprises the following components: the device comprises a first bracket, a second bracket, a plurality of guide rollers and a guide structure, wherein the second bracket is positioned at one side of the first bracket; at least one guide roller is respectively arranged on the first bracket and the second bracket; the guide structure is provided with at least one, and the guide structure is installed on the first support and/or on the second support. When the long rail piece is processed, the long rail piece is placed on the first bracket and the second bracket, the long rail piece is simultaneously lapped on the guide roller and the guide structure on the first bracket and the guide roller and the guide structure on the second bracket, and then the long rail piece is pushed towards the combined sawing and drilling direction, and one end of the long rail piece moves towards the combined sawing and drilling direction and spans the upsetter.

Therefore, the upsetter does not need to be moved, the long rail piece can also cross the upsetter, drilling and sawing of the long rail piece are completed, a large amount of time is saved, and the labor burden of workers is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a side view of a first bracket provided in an embodiment of the present utility model;

FIG. 2 is a block diagram of a nip structure and an adjustment structure provided by an embodiment of the present utility model;

FIG. 3 is a side view of a guide structure provided in an embodiment of the present utility model;

FIG. 4 is a side view of a second bracket provided in an embodiment of the present utility model;

FIG. 5 is a block diagram of a guide roller according to an embodiment of the present utility model;

fig. 6 is an enlarged view of a portion a of fig. 4 according to an embodiment of the present utility model.

Icon: 1-a first bracket; 101-supporting legs; 102-first square steel; 103-a first cross plate; 2-guiding rollers; 202-fixing base; 203-an inner roller; 204-an outer tube; 205-limiting sheets; 3-a clamping structure; 301-a first cross bar; 302-a second rail; 303-a first bolt shank; 304-fixing the nut; 4-a first screw; 401-a first nut; 402-a second nut; 5-a bottom plate; 501-a fixed plate; 502-mounting seats; 503-guiding wheels; 504-limiting plates; 505-a second screw; 6-a second bracket; 601-a second cross plate; 602-second square steel; 7-backing plate; 701-a third screw; 702-a third nut; 703-fourth nut.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The existing rail piece processing factory has the defects that the distance between a steel rail upsetter and a combined sawing and drilling machine is too small due to limited equipment field, and long rail pieces cannot be processed under the condition that existing equipment is not moved.

As shown in fig. 1-6, an embodiment of the present utility model discloses a spanned lengthening roller mechanism, which comprises a first bracket 1, a second bracket 6, a plurality of guide rollers 2 and a guide structure, wherein the first bracket 1 is installed on an upsetting machine, the second bracket 6 is positioned on the right side of the first bracket 1, a steel rail upsetting machine and a combined saw drilling machine are positioned on the left side of the first bracket 1, the combined saw drilling machine, the steel rail upsetting machine, the first bracket 1 and the second bracket 6 are sequentially arranged from left to right, and the upper surface of the first bracket 1 and the upper surface of the second bracket 6 are positioned on the same horizontal plane.

At least one guide roller 2 is respectively arranged on the first bracket 1 and the second bracket 6, a rail piece is arranged on the guide roller 2, rolling friction is arranged between the rail piece and the guide roller 2, and the rail piece is convenient to push.

In this embodiment, two guide rollers 2 are installed on the first bracket 1, the two guide rollers 2 are located at the left and right ends of the first bracket 1, two guide rollers 2 are also installed on the second bracket 6, the two guide rollers 2 are distributed at the left and right ends of the second bracket 6, two guide structures are provided, one guide structure is installed on each of the first bracket 1 and the second bracket 6, the guide structure on the first bracket 1 is located between the two guide rollers 2, the guide structure on the second bracket 6 is located at the rightmost end of the second bracket 6, and when the rail member is lapped on the guide rollers 2, the rail member is also located in the guide structure to prevent the rail member from shifting in the moving process. The number of the guide rollers 2 and the guide structures is not particularly limited, and appropriate adjustment is required according to the actual lengths of the first bracket 1 and the second bracket 6.

As a specific embodiment, as shown in fig. 1, the first bracket 1 includes a top frame, the top frame is a square frame, two first square steels 102 are connected to the top frame, the first square steels 102 are installed along the length direction of the top frame, the guide rollers 2 are installed on the first square steels 102, four supporting legs 101 are installed on the lower surface of the top frame, each supporting leg 101 is installed at the corner of the top frame, namely, divided into two columns, each column includes two supporting legs 101, one clamping opening structure 3 is installed on each supporting leg 101, 4 clamping opening structures 3 are altogether, the first bracket 1 is installed on the upsetting machine through the clamping opening structures 3, wherein two clamping opening structures 3 on the left side are installed on one beam of the upsetting machine, and two clamping opening structures 3 on the right side are installed on the other beam of the upsetting machine, so that the first bracket 1 can be stably installed on the upsetting machine.

As an alternative embodiment, unlike the above embodiment, two legs 101 are installed on the lower surface of the top frame, the two legs 101 belong to one row and are located at the middle position of the side surface of the top frame, one clamping structure 3 is installed on each leg 101, and two clamping structures 3 are totally installed, at this time, the first bracket 1 is installed on only one beam of the upsetter, so that the installation time is shortened.

As a specific example, as shown in fig. 1 and 2, the clip structure 3 includes a first cross bar 301, and an adjustment structure is mounted on the first cross bar 301, by which the height between the leg 101 and the first cross bar 301 is adjusted.

The clamping structure 3 further comprises a second cross rod 302, two first bolt rods 303 and two fixing nuts 304, the second cross rod 302 is located under the first cross rod 301, round holes for the first bolt rods 303 to penetrate through are formed in two ends of the first cross rod 301 and the second cross rod 302 respectively, the fixing nuts 304 are matched with the first bolt rods 303, the length of a hexagon head of the first bolt rods 303 is larger than the diameter of the round holes, and the hexagon head can be blocked by the round holes in the first cross rod 301;

specifically, when the clamping structure 3 is fixed to the cross beam on the upsetter, the first cross beam 301 is placed above the cross beam, the second cross beam 302 is placed below the cross beam, the two first bolt rods 303 are inserted into the round holes of the first cross beam 301 from top to bottom, then the lower ends of the first bolt rods 303 penetrate into the round holes of the second cross beam 302, the hexagon heads of the first bolt rods 303 are blocked by the round holes of the first cross beam 301 and cannot move downwards continuously, at this time, the two fixing nuts 304 are respectively screwed to the lower ends of the two first bolt rods 303, and the second cross beam 302 is pushed to be clung to the lower surface of the cross beam of the upsetter along with the upward movement of the fixing nuts 304.

Preferably, because the cross beam of the upsetter is a cylinder, arc grooves are formed in the lower surface of the first cross rod 301 and the upper surface of the second cross rod 302, the arc grooves are matched with the cross beam, and therefore the cross beam can be embedded into the two arc grooves, slipping is not easy, and stability is better.

As a specific embodiment, as shown in fig. 1 and 2, the adjusting structure includes a first screw 4, a first nut 401 and a second nut 402, a cylindrical seat is welded on the upper surface of the first cross rod 301, a deep hole is formed in the central position of the cylindrical seat, an internal thread is formed in the deep hole, the internal thread is matched with the first screw 4, the first screw 4 is vertically screwed into the deep hole of the cylindrical seat, a first transverse plate 103 is welded on the bottom side surface of each supporting leg 101, the first transverse plate 103 is vertically arranged with the supporting leg 101, a through hole through which the first screw 4 passes is formed in the first transverse plate 103, the first screw 4 passes through the through hole in the first transverse plate 103, the second nut 402 is located below the first transverse plate 103 and is tightly attached to the first transverse plate 103, and the first nut 401 is located above the first transverse plate 103 and is tightly attached to the first transverse plate 103, so that the first transverse plate 103 cannot slide on the first screw 4. The height of the first bracket 1 can be adjusted through the adjusting structure, and then the second bracket 6 with different heights can be adapted;

in this embodiment, when the height of the first bracket 1 is raised, the first nut 401 may be simultaneously screwed, the first nut 401 is moved up to a desired height, then the first bracket 1 is lifted up until the first transverse plate 103 abuts against the lower surface of the first nut 401, then the height of the first bracket 1 is kept unchanged, then the second nut 402 is screwed, and the second nut 402 is moved up until the second nut 402 abuts against the lower surface of the first transverse plate 103, and then the screwing of the second nut 402 is stopped.

As an alternative embodiment, the first cross bar 301 of the clip structure 3 is welded to the lower surface of the leg 101, and the height of the first bracket 1 cannot be adjusted, and the height of the second bracket 6 needs to be the same as the height of the first bracket 1.

As a specific embodiment, as shown in fig. 4, the second bracket 6 includes two supporting frames, two second square steels 602 are installed between the two supporting frames, the two supporting frames include two vertical rods, two connecting rods are connected between the two vertical rods, one connecting rod is welded between the tops of the two vertical rods, the other connecting rod is welded between the bottoms of the two vertical rods, a second transverse plate 601 is fixedly connected to the lower end of each vertical rod, and the second transverse plate 601 is vertically arranged with the vertical rod;

every second diaphragm 601 is last all to insert third screw rod 701, and the lower extreme of third screw rod 701 all is connected with backing plate 7, has third nut 702 and fourth nut 703 on the third screw rod 701 spiro union respectively, and fourth nut 703 is located the below of second diaphragm 601, and third nut 702 is located the top of second diaphragm 601, and the area of backing plate 7 is greater than the area of montant lower surface, can increase the area of contact with the ground, improves supporting stability.

It should be noted that, the upper surface welding at backing plate 7 has the cylinder seat, has seted up the deep hole in the central point of cylinder seat, is equipped with the internal thread in the deep hole, and the internal thread looks adaptation with third screw rod 701, and the vertical spiro union of third screw rod 701 is in the deep hole of cylinder seat, conveniently dismantles third screw rod 701, be convenient for later maintenance and change.

In this embodiment, when the height of the second bracket 6 is raised, the third nut 702 may be simultaneously screwed, the third nut 702 is moved up to a desired height, then the second bracket 6 is lifted up until the second cross plate 601 abuts against the lower surface of the third nut 702, then the height of the second bracket 6 is kept unchanged, then the fourth nut 703 is screwed, and the fourth nut 703 is moved up until the fourth nut 703 abuts against the lower surface of the second cross plate 601. The height of the second support 6 can be flexibly adjusted, upsetting machines with different heights and the first supports 1 with different heights can be conveniently adapted, and the practicability is improved.

As an alternative embodiment, the third screw 701 may be welded to the cylindrical seat, and when the third screw 701 is severely worn, the entire pad 7 may be directly replaced.

As an alternative embodiment, in this embodiment, the second transverse plate 601 is not mounted on the vertical rod, the third screw 701 and the cylinder seat are not mounted on the backing plate 7, and the backing plate 7 is welded directly to the lower surface of the vertical rod, and the height of the second bracket 6 is kept fixed, and it should be noted that the height of the first bracket 1 needs to be kept the same as the height of the second bracket 6.

As a specific embodiment, as shown in fig. 5, the guide roller 2 includes two fixing seats 202, a roller body is rotatably installed between the two fixing seats 202, the roller body includes an inner roller 203 and an outer tube 204, the inner roller 203 is rotatably installed between the two fixing seats 202, the outer tube 204 is sleeved on the inner roller 203 and is integrally formed with the inner roller 203, two limiting pieces 205 are welded on the outer tube 204, the distance between the two limiting pieces 205 is greater than the width of the rail piece, and when the rail piece is lapped on the outer tube 204, the rail piece is also located between the two limiting pieces 205, so that the limiting pieces 205 play a limiting role, and the rail piece is prevented from being separated from the outer tube 204.

As shown in fig. 1, two guide rollers 2 on the first bracket 1 are installed on the first square steel 102, specifically, the distance between the two first square steels 102 is equal to the distance between the two fixing seats 202, and when the guide rollers are installed, only the two fixing seats 202 need to be welded to the two first square steels 102, or the guide rollers are fixed by screws.

As shown in fig. 4, the two guide rolls 2 on the second bracket 6 are mounted on two second square steels 602, and the distance between the second square steels 602 is equal to the distance between the two fixing bases 202.

As a specific embodiment, as shown in fig. 3, the guiding structure includes a bottom plate 5, two mounting seats 502 and two mounting structures, the two mounting seats 502 are fixed on the upper surface of the bottom plate 5, the two mounting seats 502 are arranged at intervals along the width direction of the bottom plate 5, the mounting seats 502 are welded on a fixed plate 501, and the fixed plate 501 and the bottom plate 5 are fixed by bolts, so that the positions of the mounting seats 502 can be adjusted, and the distance between the mounting seats 502 can be adjusted according to rail members with different widths;

the mount pad 502 is the back frame, the leading wheel 503 is provided with one, and the leading wheel 503 rotates and installs in the back frame, the leading wheel 503 is horizontal setting, the width of rail spare is slightly less than the distance between the leading wheel 503, when the rail spare is taken on guide roll 2, the rail spare also is located between two leading wheels 503 simultaneously, the tread of leading wheel 503 contacts with the side of rail spare, also can drive two leading wheels 503 rotatory when promoting the rail spare, two leading wheels 503 play the effect of spacing rail spare, because the distance between spacing piece 205 is greater than the width of rail spare, consequently, rely on guide roll 2 unable restriction rail spare, the rail spare is shifted easily, and be limited to between two leading wheels 503 through the guide structure, the rail spare also can not take place the skew when moving about like this, can reach appointed saw and bore the position.

In the present embodiment, two mounting structures are attached to the lower surface of the bottom plate 5, the two mounting structures being disposed at intervals along the width direction of the bottom plate 5, by which the guide structure can be mounted to the first square steel 102 or the second square steel 602;

specifically, the mounting structure includes a limiting plate 504 and two second screws 505, the two second screws 505 are fixed on the lower surface of the bottom plate 5, two through holes for the second screws 505 to pass through are formed in the bottom plate 5, and a nut is screwed at the lower end of each second screw 505.

As shown in fig. 1, when the guide structure is mounted on the first bracket 1, the limiting plate 504 and the nut are first removed, then the guide structure is placed on two first square steels 102 on the first bracket 1, specifically, each first square steel 102 is located between two second screws 505 on two sides of the bottom plate 5, the distance between the two second screws 505 is slightly larger than the width of the first square steel 102, the length of each second screw 505 is also larger than the height of each first square steel 102, then the limiting plate 504 is inserted into each second screw 505, finally, the nut is screwed on the lower end of each second screw 505, the nut moves upwards and pushes the limiting plate 504 upwards until the limiting plate 504 abuts against the corresponding first square steel 102, and the guide structure is simply and rapidly mounted and removed. The addition of the guide structure to the second bracket 6 is consistent with the principle described above, and thus a description thereof will not be repeated.

When the long rail piece is processed, the long rail piece is placed on the first bracket 1 and the second bracket 6, the long rail piece is put on the guide roller 2 and the guide structure on the first bracket 1, meanwhile, the long rail piece is put on the guide roller 2 and the guide structure on the second bracket 6, then the long rail piece is pushed towards the combined sawing and drilling direction, and one end of the long rail piece moves towards the combined sawing and drilling direction and spans the upsetter. It should be noted that the device can be also suitable for processing other long workpieces, so as to solve the problem that the distance between two devices is small and the long workpieces cannot be processed.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct or indirect through an intermediate medium, or may be internal to two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims (10)

1. The spanned lengthening roller way mechanism is characterized by comprising a first bracket (1), a second bracket (6), a plurality of guide rollers (2) and a guide structure, wherein the second bracket (6) is positioned at one side of the first bracket (1);

at least one guide roller (2) is respectively arranged on the first bracket (1) and the second bracket (6);

the guide structure is provided with at least one, and is mounted on the first bracket (1) and/or on the second bracket (6).

2. A spanned elongate roller mechanism according to claim 1 wherein the first bracket (1) comprises a top frame, the lower surface of which is provided with a plurality of legs (101);

the plurality of the supporting legs (101) are divided into one row or two rows along the length direction of the first bracket (1), and each supporting leg (101) is provided with a clamping opening structure (3).

3. A spanned elongate roller mechanism according to claim 2 wherein the jaw structure (3) comprises a first cross bar (301), the first cross bar (301) being fixed to the lower surface of the leg (101);

or, an adjusting structure is mounted on the first cross rod (301), and the height between the supporting leg (101) and the first cross rod (301) is adjusted through the adjusting structure.

4. A spanned lengthening roller mechanism according to claim 3, characterized in that the clamping structure (3) further comprises a second cross bar (302), two first bolt bars (303) and two fixing nuts (304), the second cross bar (302) is located right below the first cross bar (301), and the first cross bar (301) and the second cross bar (302) are connected by the first bolt bars (303) and the fixing nuts (304).

5. A spanned lengthening roller mechanism according to claim 3, characterized in that the adjusting structure comprises a first screw (4), a first nut (401) and a second nut (402), the first screw (4) is vertically connected to the upper surface of the first cross bar (301), the side of each leg (101) is connected with a first cross bar (103), the first screw (4) passes through the first cross bar (103), the first nut (401) and the second nut (402) are both screwed on the first screw (4), and the first nut (401) and the second nut (402) are located on two sides of the first cross bar (103).

6. The spanned lengthening roller mechanism according to claim 4, wherein two ends of a first cross rod (301) and a second cross rod (302) are respectively provided with round holes for the first bolt rods (303) to pass through, the two first bolt rods (303) sequentially pass through the first cross rod (301) and the second cross rod (302) from top to bottom, and two fixing nuts (304) are respectively screwed to the lower ends of the first bolt rods (303).

7. The spanned lengthening roller mechanism according to claim 1, wherein the guide roller (2) comprises two fixing seats (202), a roller body is rotatably arranged between the two fixing seats (202), two limiting sheets (205) are connected to the roller body, and the two limiting sheets (205) are arranged at intervals.

8. A spanned elongate roller mechanism according to claim 2 wherein two first square steels (102) are connected to the top frame, the first square steels (102) being mounted along the length of the top frame;

the second support (6) comprises two support frames, and two second square steels (602) are arranged between the two support frames.

9. The spanned lengthening roller mechanism according to claim 8, wherein the guiding structure comprises a bottom plate (5), two mounting seats (502) and two mounting structures, wherein the two mounting seats (502) are fixed on the upper surface of the bottom plate (5), the two mounting seats (502) are arranged at intervals along the width direction of the bottom plate (5), and at least one guiding wheel (503) is rotatably mounted in each of the two mounting seats (502);

two mounting structure connects the lower surface of bottom plate (5), two mounting structure is followed the width direction interval setting of bottom plate (5), mounting structure includes limiting plate (504) and two second screw rods (505), two second screw rods (505) are fixed in the lower surface of bottom plate (5), two confession have been seted up on bottom plate (5) second screw rod (505) pass the through-hole, every second screw rod (505) lower extreme spiro union has the nut.

10. The spanned lengthening roller mechanism of claim 8, wherein both supporting frames comprise two vertical rods, a plurality of connecting rods are connected between the two vertical rods, the lower end of each vertical rod is fixedly connected with a second transverse plate (601), and the second transverse plates (601) are arranged vertically to the vertical rods;

every all insert third screw rod (701) on second diaphragm (601), the lower extreme of third screw rod (701) all is connected with backing plate (7), on third screw rod (701) spiro union respectively have third nut (702) and fourth nut (703), fourth nut (703) are located the below of second diaphragm (601), third nut (702) are located the top of second diaphragm (601).