CN218260199U

CN218260199U - Roller conveying device

Info

Publication number: CN218260199U
Application number: CN202222188109.5U
Authority: CN
Inventors: 张军; 唐超; 齐冲
Original assignee: Herolaser Intelligent Equipment Heyuan Co Ltd
Current assignee: Herolaser Intelligent Equipment Heyuan Co Ltd
Priority date: 2022-08-18
Filing date: 2022-08-18
Publication date: 2023-01-10
Anticipated expiration: 2032-08-18

Abstract

The utility model discloses a roller bearing conveyor, include: the device comprises a rack, a conveying mechanism and a first driving mechanism, wherein the rack comprises a base, a first supporting frame and a second supporting frame which are oppositely arranged on the base; the conveying mechanism comprises a plurality of rolling shafts arranged at intervals, each rolling shaft is positioned in the installation space, two ends of each rolling shaft respectively and rotatably penetrate through the first supporting frame and the second supporting frame, and a driven gear is sleeved at one end of each rolling shaft penetrating through the first supporting frame; the first driving mechanism comprises a rotary driving piece, a driving shaft and transmission gears, the driving shaft is installed on the first support frame, the transmission gears are correspondingly sleeved at positions, corresponding to the driven gears, of the driving shaft, the number of the transmission gears is consistent with that of the driven gears, the transmission gears are meshed in a one-to-one correspondence mode, and the rotary driving piece is installed on the first support frame. The utility model discloses a drive shaft guarantees that all roller bearings synchronous start or stop, and all roller bearings stop after arriving preset position, have improved roller bearing conveyor's positioning accuracy and transport load.

Description

Roller conveying device

Technical Field

The utility model relates to a workshop appliance technical field especially relates to a roller bearing conveyor.

Background

In workshop production process, carry the work piece to the assigned position through conveyor, other devices of rethread are taken away and are taken away for comparatively common design, and prior art's conveyor mainly realizes the transport of work piece through motor drive sprocket chain or belt pulley belt, has that the positioning accuracy is not high, carries the problem that the load is low.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a roller conveyor, which is not high in positioning accuracy and low in conveying load.

In order to achieve the above object, the utility model provides a roller bearing conveyor, include:

the device comprises a rack, a first supporting frame and a second supporting frame, wherein the rack comprises a base, and the first supporting frame and the second supporting frame are oppositely arranged on the base along a first direction, and a mounting space is defined by the first supporting frame and the second supporting frame;

the conveying mechanism comprises a plurality of rolling shafts which are arranged at intervals along a second direction, the second direction is perpendicular to the first direction, each rolling shaft is located in the installation space, two ends of each rolling shaft respectively penetrate through the first support frame and the second support frame in a rotatable mode, a driven gear is sleeved at one end, penetrating through the first support frame, of each rolling shaft, and the driven gear is located on one side, away from the installation space, of the first support frame;

the first driving mechanism comprises a rotary driving part, a driving shaft and a transmission gear, the driving shaft is installed on the first support frame, the driving shaft corresponds to the position of each driven gear and is correspondingly sleeved with the transmission gear, the number of the transmission gear is consistent with that of the driven gears, the transmission gear is meshed with the driven gears in a one-to-one correspondence mode, the rotary driving part is installed on the first support frame and is used for driving the driving shaft to rotate, and the roller is driven to rotate by the transmission gear and the driven gears.

Preferably, the rotary driving member is a driving motor, an output shaft of the driving motor is sleeved with a driving gear, and the driving gear is meshed with one of the transmission gears.

Preferably, the driven gear, the transmission gear and the driving gear are all helical gears.

Preferably, the roller conveying device further comprises a limiting mechanism, two ends of the roller conveying device along the first direction are a feeding end and a discharging end respectively, the limiting mechanism is located at the feeding end, the limiting mechanism comprises a second driving assembly and two mounting plates oppositely arranged along the first direction, and each mounting plate extends along the second direction;

the two mounting plates are respectively provided with two limiting assemblies, a limiting channel for a workpiece to pass through is defined between the two limiting assemblies, each limiting assembly comprises a plurality of limiting rods arranged at intervals along the second direction, a gap is formed between any two adjacent rolling shafts, the number of the gaps is consistent with that of the limiting rods, the limiting rods are arranged in a one-to-one correspondence manner, and the limiting rods penetrate through the corresponding gaps and extend upwards to be higher than the rolling shafts; two the mounting panel all with second drive assembly is connected, second drive assembly is used for driving two the mounting panel removes towards or back of the body mutually.

Preferably, be provided with the edge on the base the slide rail that first direction extends, the one end of mounting panel be provided with be used for with slide rail sliding contact complex slider, first support frame reaches be connected with the bracing piece between the second support frame, two the mounting panel is kept away from the one end of slide rail all is provided with the slide opening, the bracing piece passes two the slide opening and with slide opening sliding contact cooperation.

Preferably, the second driving assembly includes a second driving motor, a first synchronizing wheel, a second synchronizing wheel and a synchronous belt, the first synchronizing wheel and the second synchronizing wheel are arranged at intervals along a first direction, the synchronous belt is sleeved on the first synchronizing wheel and the second synchronizing wheel, the synchronous belt is divided into two transmission sections arranged at intervals along a vertical direction through the first synchronizing wheel and the second synchronizing wheel, the two mounting plates are respectively connected with the two transmission sections correspondingly, and the second driving motor is used for driving the first synchronizing wheel or the second synchronizing wheel to drive the two mounting plates to move in opposite directions or back to back through the two transmission sections.

Preferably, the base is provided with a first sensor and a second sensor at intervals along the first direction, a detection rod for triggering the first sensor and the second sensor extends from the bottom of one of the mounting plates, and the first sensor and the second sensor are both electrically connected with the second driving motor and are used for changing the steering direction of the second driving motor when being triggered.

Preferably, a tensioning plate is arranged between the two transmission sections, and the tensioning plate is mounted on the base.

Preferably, a lifting assembly is arranged on the base, the lifting assembly includes a lifting driving member and a supporting plate, the lifting driving member is used for driving the supporting plate to lift, two air pumping pipe groups are arranged on the supporting plate along the second direction at intervals, each air pumping pipe group includes a plurality of air pumping pipes arranged along the first direction at intervals, and the air pumping pipes and the gaps are correspondingly arranged and used for sucking air into the workpiece to fix the workpiece.

Preferably, a baffle is connected between the first support frame and the second support frame, and the baffle is located at the discharge end.

The technical scheme of the utility model, the roller bearing is installed between first support frame and second support frame, a plurality of roller bearing intervals set up, form defeated material passageway, when the rotary driving spare starts, it rotates to drive the drive shaft, because drive epaxial drive gear and the epaxial driven gear meshing of roller, the drive shaft rotates and can drive the pivot and rotate in order to transport the work piece, drive epaxial drive gear is unanimous with the epaxial driven gear number of roller, consequently, all roller bearings are all rotated in step and are stopped, when the assigned position was transported to the work piece, stop the rotary driving spare, all roller bearings stop in step, prevent that the work piece from continuing to remove, accomplish the work piece and carry. The design that the driving shaft enables the rolling shafts to be started and stopped synchronously enables the workpieces to stop immediately after moving to the preset position, the positioning precision of the rolling shaft conveying device is improved, meanwhile, the rolling shafts are made of hard materials, larger pressure can be borne, and the conveying load of the rolling shaft conveying device is improved.

Drawings

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

Fig. 1 is a schematic structural view of a roller conveying device according to an embodiment of the present invention at a viewing angle;

fig. 2 is a schematic structural view of a roller conveying device at another viewing angle according to an embodiment of the present invention;

fig. 3 is a schematic view of a part of a roller conveying apparatus according to an embodiment of the present invention;

fig. 4 is a schematic view of a partial structure of a roller conveying device according to an embodiment of the present invention.

The reference numbers illustrate:

the purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, back \8230;) in the present embodiment are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions in the present application as to "first," "second," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "secured" are to be construed broadly, and thus, for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The present invention is described in the directions such as "up", "down", "front", "back", "left", "right", etc. with reference to the direction shown in fig. 1, and is only used to explain the relative positional relationship between the components in the posture shown in fig. 1, and if the specific posture is changed, the directional indication is also changed accordingly.

Referring to fig. 1, the present invention provides a roller conveying device 1, including: the device comprises a rack 10, a conveying mechanism 20 and a first driving mechanism 30, wherein the rack 10 comprises a base 11, a first support frame 12 and a second support frame 13 which are oppositely arranged on the base 11 along a first direction, and an installation space 14 is enclosed by the first support frame 12 and the second support frame 13; the conveying mechanism 20 comprises a plurality of rollers 21 arranged at intervals along a second direction, the second direction is perpendicular to the first direction, each roller 21 is located in the installation space 14, two ends of each roller 21 respectively and rotatably penetrate through the first support frame 12 and the second support frame 13, one end, penetrating through the first support frame 12, of each roller 21 is sleeved with a driven gear 22, and the driven gear 22 is located on one side, departing from the installation space 14, of the first support frame 12; the first driving mechanism 30 includes a rotary driving member 31, a driving shaft 32 and transmission gears 33, the driving shaft 32 is installed on the first support frame 12, the transmission gears 33 are correspondingly sleeved at positions of the driving shaft 32 corresponding to the driven gears 22, the number of the transmission gears 33 is the same as that of the driven gears 22, and the transmission gears are meshed in one-to-one correspondence, the rotary driving member 31 is installed on the first support frame 12 and is used for driving the driving shaft 32 to rotate, so that the driving shaft 21 is driven to rotate through the transmission gears 33 and the driven gears 22.

It can be understood that the first direction is a front-back direction, the second direction is a left-right direction, the first direction is perpendicular to the second direction, the first support frame 12 and the second support frame 13 are mounted on the base 11 at intervals along the front-back direction, the rollers 21 extend along the front-back direction and are mounted between the first support frame 12 and the second support frame 13 at intervals along the left-right direction, the end portions of the rollers 21 penetrate through the first support frame 12 and the second support frame 13 and are in rolling contact with and matched with the first support frame 12 and the second support frame 13, the front ends of the rollers 21 extend out of the first support frame 12 and are sleeved with the driven gears 22, the driven gears 22 are located at the front side of the first support frame 12, and the driving shafts 32 are mounted at the front side of the first support frame 12 and extend along the left-right direction. It should be noted that the rotary driving member 31 may be located at one side of the driving shaft 32 and directly connected to the driving shaft 32 to directly rotate the driving shaft 32, or indirectly rotate the driving shaft 32 by engaging with the driving gear through a gear.

The technical scheme of the utility model, roller bearing 21 installs between first support frame 12 and second support frame 13, a plurality of roller bearing 21 intervals set up, form defeated material passageway, when rotary driving piece 31 starts, drive shaft 32 and rotate, because the driven gear 22 meshing on drive gear 33 on the drive shaft 32 and the roller bearing 21, drive shaft 32 rotates and can drive the pivot and rotate in order to transport the work piece, drive gear 33 on the drive shaft 32 is unanimous with the driven gear 22 quantity on the roller bearing 21, consequently, all roller bearings 21 are whole to be rotated in step and to be stopped, when the assigned position was transported to the work piece, stop rotary driving piece 31, all roller bearings 21 stop in step, prevent that the work piece from continuing to remove, accomplish the work piece and carry. The design that the driving shaft 32 synchronously starts and stops the rolling shaft 21 enables the workpiece to stop immediately after moving to the preset position, so that the positioning accuracy of the rolling shaft conveying device 1 is improved, meanwhile, the rolling shaft 21 is made of hard materials, so that the rolling shaft conveying device can bear larger pressure, and the conveying load of the rolling shaft conveying device 1 is improved.

Referring to fig. 1 and 4, in an embodiment, the rotary driving member 31 is a driving motor, an output shaft of the driving motor is sleeved with a driving gear 34, and the driving gear 34 is engaged with one of the transmission gears 33. The rotary driving part 31 is set as a driving motor, which can be a stepping motor or a servo motor, and is engaged with one of the transmission gears 33 through the driving gear 34 sleeved on the output shaft, so that the start and stop of the driving shaft 32 can be accurately controlled, the positioning precision of the roller conveying device 1 is improved, and meanwhile, the driving gear 34 is engaged with the driving gear through the driving gear sleeved on the output shaft, the first driving mechanism 30 can be arranged on the front side of the first support frame 12, the length of the roller conveying device 1 along the second direction is reduced, and the occupied volume of the roller conveying device is reduced.

In one embodiment, the driven gear 22, the transmission gear 33 and the driving gear 34 are all helical gears. The helical gear has good meshing performance, is suitable for the conditions of high rotating speed and high load, and can increase the bearing capacity of the gear and ensure more stable transmission because the overlap ratio of the helical gear is large and the contact area is large.

Referring to fig. 1, fig. 2 and fig. 3, in an embodiment, the roller conveying device 1 further includes a limiting mechanism 40, two ends of the roller conveying device 1 along a first direction are a feeding end and a discharging end, respectively, the limiting mechanism 40 is located at the feeding end, the limiting mechanism 40 includes a second driving assembly 41 and two mounting plates 42 oppositely disposed along the first direction, and each mounting plate 42 extends along a second direction; the two mounting plates 42 are respectively provided with two limiting assemblies 43, a limiting channel 46 for a workpiece to pass through is defined between the two limiting assemblies 43, each limiting assembly 43 comprises a plurality of limiting rods 44 arranged at intervals along the second direction, a gap 45 is formed between any two adjacent rollers 21, the number of the gaps 45 is consistent with that of the limiting rods 44, the limiting rods 44 are arranged in a one-to-one correspondence manner, and the limiting rods 44 penetrate through the corresponding gaps 45 and extend upwards to be higher than the rollers 21; both mounting plates 42 are connected to a second driving assembly 41, and the second driving assembly 41 is used for driving the two mounting plates 42 to move towards or away from each other.

The feed end is located the left side of first support frame 12 and second support frame 13, the discharge end is located the right side of first support frame 12 and second support frame 13, second drive assembly 41 is located the left side, mounting panel 42 extends along left right direction, and stretch into the bottom of roller 21, two rows of spacing subassemblies 43 are installed respectively to mounting panel 42, every row of spacing subassembly 43 all includes a plurality of gag lever posts 44 along left right direction interval setting, mounting panel 42 passes through the drive of second drive assembly 41, move along fore-and-aft direction in opposite directions or back of the body mutually. By arranging the limiting mechanism 40, after the workpiece is conveyed to the preset position on the roller 21, the workpiece is folded at the central part of the roller 21 through the back-and-forth movement of the limiting rod 44, so that the positioning accuracy of the workpiece is improved, the workpiece can be conveniently taken away in the subsequent process, and the working efficiency is improved.

Further, a sliding rail 47 extending along the first direction is arranged on the base 11, a sliding block 421 used for being in sliding contact with the sliding rail 47 is arranged at one end of the mounting plate 42, a supporting rod 15 is connected between the first supporting frame 12 and the second supporting frame 13, sliding holes 422 are arranged at one ends of the two mounting plates 42 far away from the sliding rail 47, and the supporting rod 15 penetrates through the two sliding holes 422 and is in sliding contact with the sliding holes 422. The left end of the mounting plate 42 is in sliding contact fit with the sliding rail 47 through the sliding block 421, the right end of the mounting plate is in sliding contact fit with the supporting rod 15 through the sliding hole 422, the mounting plate 42 is fixed with the supporting rod 15 through the sliding rail 47 and is suspended below the roller 21, and the mounting plate is driven by the second driving assembly 41 and slides in the front-back direction to achieve the purposes of collecting and positioning workpieces.

In an embodiment, the second driving assembly 41 includes a second driving motor 411 installed on the base 11, a first synchronous wheel 412, a second synchronous wheel 413 and a synchronous belt 414, the first synchronous wheel 412 and the second synchronous wheel 413 are disposed at intervals along a first direction, the synchronous belt 414 is sleeved on the first synchronous wheel 412 and the second synchronous wheel 413, the synchronous belt 414 is divided into two transmission sections 415 disposed at intervals along a vertical direction through the first synchronous wheel 412 and the second synchronous wheel 413, the two mounting plates 42 are respectively connected with the two transmission sections 415 correspondingly, and the second driving motor 411 is used for driving the first synchronous wheel 412 or the second synchronous wheel 413, so as to drive the two mounting plates 42 to move toward or away from each other through the two transmission sections 415. The first synchronizing wheel 412 and the second synchronizing wheel 413 are arranged on the left sides of the first support frame 12 and the second support frame 13 at intervals along the front-back direction, the two mounting plates 42 are respectively connected with the two transmission sections 415, and due to the characteristics of the synchronous belt 414, the moving directions of the two transmission sections 415 are opposite, so that when the second driving motor 411 is started, the two mounting plates 42 can be driven to be opened or closed in the front-back direction through the synchronous belt 414, and the positioning effect on the workpiece can be achieved. Through the design of synchronizing wheel and hold-in range 414 for only can accomplish the function that drives two mounting panels 42 simultaneously and move towards opposite direction through a second driving motor 411, simple structure, the function is stable.

In one embodiment, the base 11 is provided with a first sensor 16 and a second sensor 17 at an interval along the first direction, a detection rod 423 for triggering the first sensor 16 and the second sensor 17 extends from the bottom of one of the mounting plates 42, and both the first sensor 16 and the second sensor 17 are electrically connected to the second driving motor 411 and are used for changing the rotation direction of the second driving motor 411 when being triggered. Through setting up first sensor 16 and second sensor 17 along fore-and-aft direction interval on base 11, can make hold-in range 414 rotate to preset position after automatic upset to drive incessant automation of two mounting panels 42 and open and receive, accomplish the location to the work piece, improved conveying efficiency.

In one embodiment, a tension plate 18 is disposed between the two transmission sections 415, and the tension plate 18 is mounted on the base 11. The tensioning plate 18 keeps the synchronous belt 414 always tensioned between the first synchronous wheel 412 and the second synchronous wheel 413, so that the synchronous belt 414 can drive the mounting plate 42 to keep moving, and the stability of the structure is improved.

Referring to fig. 1 and 3, in an embodiment, a lifting assembly 50 is disposed on the base 11, the lifting assembly 50 includes a lifting driving member 51 and a supporting plate 52, the lifting driving member 51 is used for driving the supporting plate 52 to lift, the supporting plate 52 is provided with two air-extracting tube sets 53 at intervals along a second direction, the air-extracting tube sets 53 include a plurality of air-extracting tubes 54 at intervals along the first direction, and the air-extracting tubes 54 are disposed corresponding to the gaps 45 and used for sucking air into the workpiece to fix the workpiece. The lifting assembly 50 is located in the installation space 14 and below the roller 21, the lifting driving member 51 drives the supporting plate 52 to lift, when the mounting plate 42 moves away from the other, the supporting plate 52 descends, when the mounting plate 42 moves in opposite directions, the supporting plate 52 ascends, when the mounting plate 42 reaches the folding position, the workpiece is bundled and positioned, meanwhile, the supporting plate 52 ascends to the highest position, the suction pipe 54 corresponds to the gap to generate suction to the workpiece, the workpiece is further fixed, the workpiece is prevented from moving, and the positioning accuracy of the roller conveying device 1 is further improved.

In one embodiment, a baffle 60 is connected between the first support frame 12 and the second support frame 13, and the baffle 60 is located at the discharge end. The baffle 60 is arranged on the right sides of the first support frame 12 and the second support frame 13, so that workpieces are prevented from falling off the roller 21 due to inertia, and the safety of the roller conveying device 1 is improved.

The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A roller conveyor, comprising:

2. The roller conveying apparatus according to claim 1, wherein the rotary driving member is a driving motor, and an output shaft of the driving motor is sleeved with a driving gear, and the driving gear is engaged with one of the transmission gears.

3. The roller conveyor according to claim 2, wherein said driven gear, said drive gear, and said drive gear are helical gears.

4. Roller conveyor according to claim 1,

the roller conveying device further comprises a limiting mechanism, the two ends of the roller conveying device along the first direction are respectively a feeding end and a discharging end, the limiting mechanism is located at the feeding end, the limiting mechanism comprises a second driving assembly and two mounting plates oppositely arranged along the first direction, and each mounting plate extends along the second direction;

the two mounting plates are respectively provided with two limiting assemblies, a limiting channel for a workpiece to pass through is defined between the two limiting assemblies, each limiting assembly comprises a plurality of limiting rods arranged at intervals along the second direction, a gap is formed between any two adjacent rolling shafts, the number of the gaps is consistent with that of the limiting rods, the limiting rods are arranged in a one-to-one correspondence manner, and the limiting rods penetrate through the corresponding gaps and extend upwards to be higher than the rolling shafts; two the mounting panel all with second drive assembly is connected, second drive assembly is used for driving two the mounting panel moves towards or back on the back mutually.

5. The roller conveyor according to claim 4, wherein the base has a slide rail extending along the first direction, one end of the mounting plate has a slide block for slidably engaging the slide rail, a support rod is connected between the first support frame and the second support frame, and ends of the two mounting plates remote from the slide rail have slide holes, the support rod passes through the two slide holes and slidably engages the slide holes.

6. The roller conveying device according to claim 4, wherein the second driving assembly includes a second driving motor, a first synchronizing wheel, a second synchronizing wheel and a synchronous belt, the second driving motor, the first synchronizing wheel, the second synchronizing wheel and the synchronous belt are mounted on the base, the first synchronizing wheel and the second synchronizing wheel are spaced apart along the first direction, the synchronous belt is sleeved on the first synchronizing wheel and the second synchronizing wheel, the synchronous belt is divided into two transmission sections spaced apart along the vertical direction by the first synchronizing wheel and the second synchronizing wheel, the two mounting plates are correspondingly connected to the two transmission sections, respectively, and the second driving motor is configured to drive the first synchronizing wheel or the second synchronizing wheel so as to drive the two mounting plates to move toward or away from each other through the two transmission sections.

7. The roller conveyor according to claim 6, wherein the base is provided with a first sensor and a second sensor spaced apart along the first direction, and a detection rod extends from a bottom of one of the mounting plates for triggering the first sensor and the second sensor, and the first sensor and the second sensor are electrically connected to the second driving motor and are adapted to change a direction of rotation of the second driving motor when triggered.

8. The roller conveyor according to claim 6, wherein a tension plate is disposed between two of said drive segments, said tension plate being mounted to said base.

9. The roller conveying device according to claim 5, wherein the base is provided with a lifting assembly, the lifting assembly comprises a lifting driving member and a supporting plate, the lifting driving member is used for driving the supporting plate to lift, the supporting plate is provided with two air pumping pipe groups at intervals along the second direction, the air pumping pipe groups comprise a plurality of air pumping pipes at intervals along the first direction, and the air pumping pipes are correspondingly arranged with the gaps and used for sucking air into the workpiece to fix the workpiece.

10. The roller conveyor according to claim 4 wherein a dam is coupled between said first support frame and said second support frame, said dam being positioned at said discharge end.