CN117485835A

CN117485835A - Circulation conveying device and workpiece tray conveying method

Info

Publication number: CN117485835A
Application number: CN202311530456.4A
Authority: CN
Inventors: 吕建坤; 林江海
Original assignee: Guangzhou Zaide Automation Intelligent Technology Co ltd
Current assignee: Guangzhou Zaide Automation Intelligent Technology Co ltd
Priority date: 2023-11-16
Filing date: 2023-11-16
Publication date: 2024-02-02

Abstract

The invention discloses a circulating conveying device and a workpiece tray conveying method, wherein the circulating conveying device comprises two conveying line assemblies and two lifting devices, the conveying line assemblies are used for conveying trays, the conveying line assemblies are U-shaped, the conveying line assemblies are provided with a feeding end and a discharging end, the two conveying lines are correspondingly arranged at intervals from top to bottom, and the two lifting devices are respectively arranged at the feeding end and the discharging end; the conveying line assembly comprises a plurality of conveying modules, the conveying modules are connected in the straight line direction, the conveying modules comprise two sets of roller sets which are oppositely arranged, a plurality of first rollers are arranged in each set of roller sets, the first rollers are fixedly connected with multi-wedge belt wheels, and a driving belt is wound between every two adjacent multi-wedge belt wheels. The automatic and instant alarm of the whole transportation line is realized, and the accuracy in the transportation process is improved.

Description

Circulation conveying device and workpiece tray conveying method

Technical Field

The invention relates to the field of conveying equipment in processing production, in particular to a circulating conveying device and a workpiece tray conveying method.

Background

The existing conveying line is generally characterized in that a workpiece tray is directly placed on a conveying medium (comprising a V-shaped belt, a synchronous belt, a flat belt, a round belt and a chain) and synchronously moves with the conveying medium, and the conveying medium is responsible for conveying the workpiece tray and also responsible for transmission of system power. The conveying medium of the conveying system in direct contact with the workpiece tray is easier to damage, the service life is shortened, and the maintenance cost is higher.

In the prior art, the invention patent with the application number of CN202210599164.5 discloses a material circulation conveying line, wherein feeding and discharging split flow is realized through at least one feeding conveying line and at least one discharging conveying line, and then the material circulation conveying line is transported among the feeding conveying line, the processing equipment and the discharging conveying line through a first clamping mechanism and a second clamping mechanism, so that the processing efficiency is improved, and the material stock pressure is reduced; comprises at least one feeding conveying line and at least one discharging conveying line; stop mechanisms for stopping materials are arranged on the feeding conveying line at intervals; a first transfer mechanism for transferring the materials from the feeding conveying line to the processing equipment and from the processing equipment to the discharging conveying line is arranged beside the stopping mechanism; and a second transfer mechanism for transferring the material from the stopping mechanism to the first transfer mechanism and transporting the material from the stopping mechanism to the downstream of the stopping mechanism is arranged beside the stopping mechanism. In the technology, a loading and transporting line and a discharging and transporting line are arranged side by side to realize loading, processing and discharging, wherein when a tray is used for transporting materials, the tray and the materials are discharged at the same time, and the tray is required to be continuously placed manually, so that the efficiency is low; in addition, on the whole conveying path, if the processing procedures are too many, the whole material circulation and transportation are easy to be overlong, and a large amount of workshop space is consumed; in addition, the condition that the work piece was lost appears easily on the whole transportation line, leads to appearing the problem and needs to carry out analysis reprocessing, influences conveying efficiency.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the circulating conveying device which can adapt to the requirements of a production line and realize the rapid and stable operation of the workpiece tray.

According to a first aspect of the invention, the circulating conveying device comprises two conveying line assemblies and two lifting devices, wherein the conveying line assemblies are used for conveying trays, the conveying line assemblies are U-shaped, each conveying line assembly is provided with a feeding end and a discharging end, two conveying lines are correspondingly arranged at intervals from top to bottom, the two lifting devices are respectively arranged at the feeding end and the discharging end, one lifting device is used for conveying the trays from the conveying line assembly positioned below to the conveying line assembly positioned above, and the other lifting device is used for conveying the trays from the conveying line assembly positioned above to the conveying line assembly positioned below; the conveying line assembly comprises a plurality of conveying modules, the conveying modules are connected in a straight line direction, the conveying modules comprise two groups of roller groups which are oppositely arranged, a plurality of first rollers are arranged in each group of roller groups side by side and at intervals, the first rollers are fixedly connected with multi-wedge belt wheels, a driving belt is wound between two adjacent multi-wedge belt wheels, and a driving motor for driving the first rollers to rotate is arranged in each conveying module; the conveying line assembly comprises a straight line section and a curve section, one end of each curve section is fixedly connected, the other end of each curve section is fixedly connected with the straight line section, the conveying line assembly is U-shaped, a detection device is arranged at the outer side edge of the conveying line assembly and used for detecting whether a workpiece is placed on a tray or not, the detection device is provided with a controller with an infrared receiving function, the controller is electrically connected with a plurality of driving motors, and the tray is provided with an infrared emitter which can be electrically connected with the controller.

The circulating conveying device provided by the embodiment of the invention has at least the following beneficial effects:

the lifting device is utilized to respectively send and recycle the trays before and after use, so that the conveying efficiency of the whole circulating conveying device is improved;

two lifting devices for counter-direction transportation are matched, one of the two conveying line assemblies is used for being matched with processing equipment to process workpieces on the tray, and the other conveying line assembly is used for temporarily storing the tray, so that the length of the whole circulating conveying device is shortened, the space is reasonably utilized, and the occupied area is reduced;

the whole transmission belt of the traditional belt transmission conveying system is replaced by the transmission belt for linkage between two adjacent first rollers, so that the radial distance between the multi-wedge belt wheels is reduced, the length of a single transmission belt is reduced, and the deviation of the transmission belt in the transmission process can be reduced;

whether the processed tray still has the work piece is detected in real time by utilizing the detection device, so that the processed work piece is prevented from remaining in processing equipment, and meanwhile, whether the recovered tray still has the unremoved work piece is detected in real time by utilizing the detection device, so that the processed work piece is prevented from being left.

According to some embodiments of the invention, in the single conveying module, a linkage rod is connected between two first rollers in two sets of rollers, and any one of the first rollers is connected with a driving motor.

According to some embodiments of the invention, the transportation line assembly comprises a straight line section and a curve section, wherein one end of each of the two curve sections is fixedly connected, and the other end of each of the two curve sections is fixedly connected with the straight line section, so that the transportation line assembly is U-shaped.

According to some embodiments of the invention, the conveyor line assembly is provided with a processing station, and the processing station is provided with a lifting mechanism for driving the tray to lift.

According to some embodiments of the present invention, a second roller for driving the tray to translate is provided on the lifting mechanism, a steering mechanism for driving the tray to turn 180 ° is provided on one side of the processing station, a third roller for driving the tray to translate is provided on the steering mechanism, the rolling directions of the second roller and the third roller are consistent, wherein the lifting mechanism can drive the tray to lift and enable the tray to be located at a first position, a second position and a third position, the first position, the second position and the third position are sequentially arranged from bottom to top, and when the tray is located at the first position, the tray contacts with the first roller; when the tray is in the second position, the uppermost end of the lifting mechanism is flush with the uppermost end of the steering mechanism.

According to some embodiments of the invention, the lifting mechanism comprises a mounting plate and a lifting cylinder, the second roller is rotatably mounted on the mounting plate, and the lifting cylinder is connected with the bottom of the mounting plate and is used for driving the mounting plate to lift.

According to some embodiments of the invention, the steering mechanism comprises a rotating table and a rotating motor for driving the rotating table to rotate, the third roller is rotatably arranged on the rotating table, and the rotating motor is fixedly connected with the bottom of the rotating table.

According to some embodiments of the invention, an electric limiter and a photoelectric sensing assembly are arranged on the rotating table, and the photoelectric sensing assembly is electrically connected with the electric limiter so as to drive the electric limiter to restrict the position of the tray.

According to some embodiments of the present invention, the lifting device includes two sets of oppositely disposed lifting assemblies, the lifting assemblies include two rotating shafts, a synchronous belt and a supporting plate, the two rotating shafts are arranged at intervals along a vertical direction, the synchronous belt is wound on the two rotating shafts so as to enable the two rotating shafts and the synchronous belt to be in transmission fit, the supporting plate is fixedly mounted on a surface of the synchronous belt along a horizontal direction, and a plurality of fourth rollers disposed at intervals are disposed on the supporting plate along a length direction of the supporting plate, wherein the supporting plates in the two lifting assemblies are in one-to-one correspondence to form a bearing space between the corresponding two supporting plates.

According to some embodiments of the invention, both ends of the pallet are provided with guiding surfaces inclined outwards.

According to a second aspect of the present invention, a workpiece pallet conveying method for controlling a circulating conveying apparatus according to the first aspect of the present invention, the two conveying line assemblies including an upper conveying line assembly and a lower conveying line assembly, the two lifting devices including a first lifting device for continuously lifting a pallet upward and a second lifting device for continuously conveying a pallet downward, the detecting device including an upper detecting device and a lower detecting device, the upper detecting device being located outside the upper conveying line assembly and electrically connected to the upper conveying line assembly, the lower detecting device being located outside the lower conveying line assembly and electrically connected to the lower conveying line assembly, the workpiece pallet conveying method comprising the steps of:

s100: the user continuously puts the workpiece into the tray in the first lifting device;

s200: the tray is transported from bottom to top in the first lifting device, and moves to the feeding end of the upper transport line assembly from the discharging end of the lower transport line assembly;

s300: the tray moves on the upper conveying line assembly;

s400: the pallet moves to corresponding processing equipment, transportation is stopped, and the processing equipment is utilized to process the workpieces on the pallet;

s500: the tray is transported on the upper transport line assembly and passes through the upper detection device, the upper detection device detects whether the tray is provided with a workpiece, and if the tray is not provided with the workpiece, the step S510 is performed; if the tray has a workpiece, go to step S520;

s510: the controller of the upper detection device is used for controlling the upper conveying line assembly to stop, and the workpiece is taken out of the processing equipment and put back into the tray, and then the step S600 is continued;

s520: the controller of the upper detection device is used for controlling the upper transport line assembly to continue to work, and the step S600 is continued;

s600: the second lifting device (20B) conveys the tray from the discharge end of the upper conveying line assembly to the feed end of the lower conveying line assembly, and the workpiece is taken down;

s700: the tray is transported on the lower transportation line assembly, and passes through the lower detection device, the lower detection device detects whether the tray is provided with a workpiece, and if the tray is provided with the workpiece, the step S710 is performed; if the tray does not have the workpiece, go to step S720;

s710: the controller of the lower detection device is used for controlling the upper conveying line assembly to stop, and the step S800 is continued after the workpiece is taken out from the tray;

s720: the controller of the lower detection device is utilized to control the upper transportation line assembly to continue to work, and the step S800 is continued;

s800: the pallet is transported to the first lifting device by the lower transport line assembly;

s900: the above steps S100 to S800 are repeated.

the lifting device is utilized to respectively send and recycle the trays before and after use, so that the conveying efficiency of the whole circulating conveying device is improved; and cooperate detection device, utilize detection device to come the tray after the real-time detection processing still to have the work piece, avoid the work piece after the processing to remain in processing equipment, simultaneously, utilize detection device to come the real-time detection to retrieve whether still remain the not work piece of taking off on the tray, avoid the work piece that has processed to be left over to realize the automation and the instant alarm of whole transportation line, improve the accuracy in the transportation.

According to some embodiments of the present invention, the circulating conveying apparatus further includes a lifting mechanism and a steering mechanism, the lifting mechanism is located in the transportation line assembly, the steering mechanism is located at one side of the transportation line assembly and is disposed corresponding to the lifting mechanism, the lifting mechanism can drive the tray to lift and enable the tray to be located at a first position and a second position, the first position and the second position are sequentially arranged from bottom to top, and when the tray is located at the first position, the tray contacts the first roller; when the tray is positioned at the second position, the uppermost end of the lifting mechanism is flush with the uppermost end of the steering mechanism;

the workpiece tray conveying method comprises the following steps of:

s300: the tray moves on the upper conveying line assembly, and if the workpiece needs to be turned, step S310 is performed; if the workpiece does not need to be turned, performing step S400;

s310: the tray enters the lifting mechanism along with the upper conveying line assembly and is lifted to a second position by the lifting mechanism, and step S320 is performed;

s320: step S330 is performed by enabling the tray to enter the steering mechanism by matching the lifting mechanism with the steering mechanism;

s330: the steering mechanism rotates the tray by 180 degrees to turn the workpiece by 180 degrees, and step S340 is performed;

s340: the steering mechanism is matched with the lifting mechanism, so that the pallet after steering enters the lifting mechanism, and the step S350 is performed;

s350: the lifting mechanism descends to a first position, so that the tray is contacted with the first roller, and step S400 is performed;

s900: the above steps S100 to S800 are repeated.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic view of a circulating conveying apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view of the flow path of a tray in the endless conveyor according to an embodiment of the invention;

FIG. 3 is a schematic view of a conveyor line assembly of the endless conveyor device according to an embodiment of the invention;

fig. 4 is an enlarged view of a portion B of fig. 3;

fig. 5 is an enlarged view of a portion a of fig. 1;

FIG. 6 is a schematic view of the installation of the lifting mechanism (without the mounting plate and the second roller) of the endless conveyor according to the embodiment of the invention;

FIG. 7 is a schematic view of a steering mechanism of the endless conveyor according to an embodiment of the invention;

FIG. 8 is a schematic view of a lifting device of the circulating conveying device according to an embodiment of the present invention;

FIG. 9 is a schematic view of a lift assembly of the endless conveyor according to an embodiment of the invention;

fig. 10 is a flow chart of a workpiece tray conveying method of the circulating conveying device according to the first embodiment of the invention;

fig. 11 is a flow chart of a workpiece tray conveying method of the circulating conveying device in the second embodiment of the invention.

Legend description:

1. a tray; 10. a conveyor line assembly; 10A, an upper conveying line assembly; 10B, a lower conveying line assembly; 11. a processing station; 100. a transmission module; 110. a roller set; 111. a first roller; 112. a V-ribbed pulley; 113. a transmission belt; 114. a linkage rod; 115. a driving motor; 120. a straight line segment; 130. a curve section; 200. a lifting mechanism; 210. a mounting plate; 220. lifting the cylinder; 230. a second roller; 300. a steering mechanism; 310. a rotating table; 311. an electric limiter; 312. a photoelectric sensing assembly; 320. a rotating motor; 330. a third roller; 20. a lifting device; 20A, a first lifting device; 20B, a second lifting device; 21. a lifting assembly; 211. a rotating shaft; 212. a synchronous belt; 213. a supporting plate; 2131. a fourth roller; 2132. a guide surface; 2133. a bearing space;

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

It will be understood by those skilled in the art that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element/component is referred to as being "connected" to another element/component, it can be directly connected to the other element/component or intervening elements/components may also be present. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.

Referring to fig. 1 to 9, the circulation conveyor of the embodiment of the present invention includes two conveyor line assemblies 10 and two lifting devices 20, the conveyor line assemblies 10 are used for conveying the trays 1, the conveyor line assemblies 10 are U-shaped, the conveyor line assemblies 10 are provided with a feeding end and a discharging end, the two conveyor lines are correspondingly spaced from top to bottom, the two lifting devices 20 are respectively provided at the feeding end and the discharging end, one lifting device 20 is used for transferring the trays 1 from the conveyor line assembly 10 located below to the conveyor line assembly 10 located above, and the other lifting device is used for transferring the trays 1 from the conveyor line assembly 10 located above to the conveyor line assembly 10 located below; the conveying line assembly 10 comprises a plurality of conveying modules 100, wherein the conveying modules 100 are connected in a straight line direction, the conveying modules 100 comprise two sets of roller sets 110 which are oppositely arranged, a plurality of first rollers 111 are arranged in each set of roller sets 110 side by side at intervals, the first rollers 111 are fixedly connected with multi-wedge belt wheels 112, a driving belt 113 is wound between two adjacent multi-wedge belt wheels 112, and a driving motor for driving the first rollers to rotate is arranged in a single conveying module; the conveying line assembly comprises a straight line section and a curve section, one end of each curve section is fixedly connected, the other end of each curve section is fixedly connected with the straight line section, the conveying line assembly is U-shaped, a detection device (not shown in the figure) is arranged at the outer side edge of the conveying line assembly and used for detecting whether a workpiece is placed on a tray or not, the detection device is provided with a controller with an infrared receiving function, the controller is electrically connected with a plurality of driving motors, and the tray is provided with an infrared emitter which can be electrically connected with the controller.

The transporting line assembly 10 is divided into an upper transporting line assembly 10A and a lower transporting line assembly 10B, the feeding end of the upper transporting line assembly 10A and the discharging end of the lower transporting line assembly 10B are correspondingly disposed, the discharging end of the upper transporting line assembly 10A and the feeding end of the lower transporting line assembly 10B are correspondingly disposed, and the two lifting devices 20 are divided into a first lifting device 20A for continuously lifting the tray 1 upwards and a second lifting device 20B for continuously transporting the tray 1 downwards, wherein, referring to fig. 1 and 2, as an embodiment of the circulating conveying device of the present invention, referring to fig. 10, the working flow of the circulating conveying device of the embodiment is as follows:

s100: the user continuously puts the work pieces into the tray 1 in the first elevating device 20A;

s200: the pallet 1 is transported in the first lifting device 20A from bottom to top, and is moved to the feeding end of the upper transport line assembly 10A from the discharging end of the lower transport line assembly 10B;

s300: the pallet 1 moves on the upper conveyor line assembly 10A;

s400: the pallet 1 is moved to corresponding processing equipment, transportation is stopped, and the processing equipment is utilized to process the workpieces on the pallet 1;

s500: the pallet 1 is transported on the upper transportation line assembly 10A, and passes through the upper detection device, the upper detection device detects whether the pallet 1 has a workpiece, if the pallet 1 has no workpiece, the step S510 is performed; if the tray 1 has a workpiece, go to step S520;

s510: the controller of the upper detection device is used for controlling the upper conveying line assembly 10A to stop, and the workpiece is taken out of the processing equipment and put back into the tray 1, and then the step S600 is continued;

s520: the controller of the upper detection device is used for controlling the upper transportation line assembly 10A to continue to work, and the step S600 is continued;

s600: the second lifting device 20B conveys the tray 1 from the discharge end of the upper conveying line assembly 10A to the feed end of the lower conveying line assembly 10B, and removes the workpiece;

s700: the pallet 1 is transported on the lower transportation line assembly 10B, and passes through the lower detection device, the lower detection device detects whether the pallet 1 has a workpiece, if the pallet 1 has a workpiece, step S710 is performed; if the tray 1 does not have a workpiece, go to step S720;

s710: the controller of the lower detection device is used for controlling the upper conveying line assembly 10A to stop, and the step S800 is continued after the workpieces are taken out of the tray 1;

s720: the controller of the lower detection device is utilized to control the upper transportation line assembly 10A to continue to work, and the step S800 is continued;

s800: the pallet 1 is transported into the first elevating device 20A by the lower transport line assembly 10B;

s900: the above steps S100 to S800 are repeated.

It should be noted that, in the above-mentioned working procedure, when the pallet 1 moves on the transporting line assembly 10, the transporting modules 100 are fixedly connected to form a U-shaped transporting line, specifically, the transporting line assembly 10 includes a straight line segment 120 and a curved line segment 130, one end of the two curved line segments 130 is fixedly connected, the other end is fixedly connected to the straight line segment 120, so that the transporting line assembly 10 is U-shaped, in addition, the straight line segment 120 may be connected between the two curved line segments 130 to cooperate with a plurality of processing devices, the transporting distance of the pallet 1 is prolonged, and the plurality of transporting modules 100 move relatively independently, when moving to one of the transporting modules 100 corresponding to the processing device, the transporting modules 100 may be stopped, so as to position the pallet 1, and is processed by processing equipment, and during conveying (along arrow direction of fig. 3), referring to fig. 3 and 4, two sets of roller sets 110 in a single conveying module 100 can both provide friction force through direct contact with a tray 1, during the rotation of a first roller 111, the tray 1 is driven by friction force, and the first roller 111 is driven and matched by a driving belt 113 between multi-wedge rollers 112, so that a plurality of first rollers 111 in the roller sets 110 on one side can synchronously rotate, wherein in the straight line section 120, the driving belt 113 is in a belt shape, and in the curve section 130, in order to match with twistable characteristics, the driving belt 113 is in a round bar shape, and the circulating conveying device of the embodiment of the invention has at least the following functions:

(1) the lifting device 20 is utilized to respectively send and recycle the trays 1 before and after use, so that the conveying efficiency of the whole circulating conveying device is improved;

(2) two lifting devices 20 for transporting in opposite directions are matched, one of the two conveying line assemblies 10 is used for being matched with processing equipment to process workpieces on the tray 1, and the other is used for temporarily storing the tray 1, so that the length of the whole circulating conveying device is shortened, the space is reasonably utilized, and the occupied area is reduced;

(3) the whole driving belt 113 of the traditional belt driving conveying system is replaced by the driving belt 113 for linkage between two adjacent first rollers 111, so that the radial distance between the multi-wedge belt wheels 112 and the multi-wedge belt wheels 112 is reduced, the length of a single driving belt 113 is reduced, and the deviation of the driving belt 113 in the driving process can be reduced;

(4) whether the processed tray 1 still has the work piece is detected in real time by utilizing the detection device, so that the processed work piece is prevented from remaining in processing equipment, and meanwhile, whether the recovered tray 1 still has the unremoved work piece is detected in real time by utilizing the detection device, so that the processed work piece is prevented from being left.

It should be noted that, in order to make the rotation amplitudes of the first rollers 111 in the single transfer module 100 tend to be uniform, in the single transfer module 100, a linkage rod 114 is connected between two first rollers 111 in the two sets of roller sets 110, and a driving motor 115 is connected to any one first roller 111.

Specifically, in the above step S300, the processing station 11 is provided on the transportation line assembly 10, and the lifting mechanism 200 for driving the tray 1 to lift is provided on the processing station 11. Referring to fig. 5 and 6, when the pallet 1 is transported to the processing station 11, the transfer module 100 located at the processing station 11 stops the transportation, and lifts the pallet 1 by using the lifting mechanism 200, so that the workpieces in the pallet 1 can enter the processing equipment for processing, or be conveniently removed by a manipulator, and replaced by the pallet 1 after processing, the pallet 1 is lowered by using the lifting mechanism 200, so that the pallet 1 is attached to the first roller 111 again, and can continue to move along the transport line assembly 10.

In some embodiments, as a second embodiment of the circulating conveying apparatus of the present invention, the circulating conveying apparatus is further provided with a lifting mechanism and a steering mechanism, referring to fig. 1, 5 and 6, the lifting mechanism 200 is provided with a second roller 230 for driving the tray 1 to translate, one side of the processing station 11 is provided with a steering mechanism 300 for driving the tray 1 to turn 180 °, the steering mechanism 300 is provided with a third roller 330 for driving the tray 1 to translate, the rolling directions of the second roller 230 and the third roller 330 are consistent, wherein the lifting mechanism 200 can drive the tray 1 to lift and enable the tray 1 to be located at a first position and a second position, the first position and the second position are sequentially arranged from bottom to top, and when the tray 1 is located at the first position, the tray 1 is in contact with the first roller 111; when the tray 1 is in the second position, the uppermost end of the elevating mechanism 200 is flush with the uppermost end of the steering mechanism 300.

In this embodiment, the lifting mechanism 200 and the steering mechanism 300 are used to steer the workpiece to adapt to the required processing position of the next process, specifically, in actual use, when the workpiece on the tray 1 enters the processing station 11, the workpiece is lifted to the second station by the lifting mechanism 200, the tray 1 is moved to the steering mechanism 300 by the second roller 230, the tray 1 is turned 180 ° by the steering mechanism 300, after the steering is completed, the tray 1 is moved to the lifting mechanism 200 by the driving of the third roller 330, the lifting mechanism 200 is lowered to the first position, the tray 1 is contacted with the first roller 111, and the tray 1 is transported by the first roller 111.

Preferably, referring to fig. 7 and 8, the elevating mechanism 200 includes a mounting plate 210 and an elevating cylinder 220, the second roller 230 is rotatably mounted on the mounting plate 210, the elevating cylinder 220 is connected to the bottom of the mounting plate 210 and is used to drive the mounting plate 210 to elevate, and the steering mechanism 300 includes a rotating table 310 and a rotating motor 320 for driving the rotating table 310 to rotate, the third roller 330 is rotatably mounted on the rotating table 310, and the rotating motor 320 is fixedly connected to the bottom of the rotating table 310. The tray 1 is placed on the mounting plate 210, the mounting plate 210 is driven to ascend or descend by the lifting cylinder 220 to switch the tray 1 among the first position, the second position and the third position, the rotating motor 320 of the steering mechanism 300 is used for directly driving the rotating table 310 to rotate, and the tray 1 is accurately rotated 180 ° by torque, so that the third roller 330 can transport the tray 1 back into the lifting mechanism 200.

In addition, in order to prevent the tray 1 from being separated when moving to the steering mechanism 300, the rotating table 310 is provided with an electric limiter 311 and a photoelectric sensing assembly 312, and the photoelectric sensing assembly 312 is electrically connected with the electric limiter 311 to drive the electric limiter 311 to restrict the position of the tray 1. When the tray 1 is transported to the sensing range of the photoelectric sensing assembly 312 (transported along the arrow direction in fig. 7), the electric limiter 311 is controlled to be started and protrude from the surface of the rotating table 310, so as to restrict the movement of the tray 1, and after the position of the tray 1 is fixed, the rotating table 310 is rotated again, so as to turn the tray 1.

Specifically, referring to fig. 11, the work pallet 1 conveying method of the circulation conveying apparatus of the second embodiment includes the steps of:

s300: the pallet 1 moves on the upper conveying line assembly 10A, and if the workpiece needs to be turned, the step S310 is performed; if the workpiece does not need to be turned, performing step S400;

s310: the tray 1 enters the lifting mechanism 200 along with the upper conveying line assembly 10A, and is lifted to a second position by the lifting mechanism 200, and step S320 is performed;

s320: step S330 is performed by the lifting mechanism 200 cooperating with the steering mechanism 300 to enable the pallet 1 to enter the steering mechanism 300;

s330: the steering mechanism 300 turns the tray 1 by 180 degrees to turn the workpiece by 180 degrees, and the step S340 is performed;

s340: the steering mechanism 300 is matched with the lifting mechanism 200, so that the steered tray 1 enters the lifting mechanism 200 to carry out step S350;

s350: the lifting mechanism 200 descends to the first position, brings the tray 1 into contact with the first roller 111, and proceeds to step S400;

s900: the above steps S100 to S800 are repeated.

In some embodiments, referring to fig. 8 and 9, the lifting device 20 includes two sets of oppositely disposed lifting assemblies 21, the lifting assemblies 21 include two rotating shafts 211, a synchronous belt 212 and a supporting plate 213, the two rotating shafts 211 are arranged at intervals along a vertical direction, the synchronous belt 212 is wound on the two rotating shafts 211 so as to make the two rotating shafts 211 and the synchronous belt 212 in transmission fit, the supporting plate 213 is fixedly mounted on a surface of the synchronous belt 212 along a horizontal direction, and a plurality of fourth rollers 2131 are disposed on the supporting plate 213 at intervals along a length direction of the supporting plate 213, wherein the supporting plates 213 in the two lifting assemblies 21 are in one-to-one correspondence to form a supporting space 2133 (refer to a dotted line range in fig. 8) between the corresponding two supporting plates 213.

During the rotation of the rotation shaft 211, the synchronous belt 212 rolls circularly on the rotation shaft 211, so that the supporting plate 213 fixed on the synchronous belt 212 can also move circularly, when the supporting plate 213 moves to be level with the upper conveying line assembly 10A or the lower conveying line assembly 10B, the tray 1 can be conveyed into the supporting plate 213 of the synchronous belt 212 by the conveying line assembly 10, or the tray 1 can be conveyed into the conveying line assembly 10 (by manual pushing), specifically, the tray 1 is input into the bearing space 2133, or the tray 1 is conveyed into the conveying line assembly 10 from the bearing space 2133, and the fourth roller 2131 can be arranged to actively convey the tray 1 into the conveying line assembly 10.

Further, in order to facilitate the entry and exit of the tray 1, both ends of the pallet 213 are provided with guide surfaces 2132 inclined to the outside.

The foregoing is only a partial embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. The circulating conveying device is characterized by comprising two conveying line assemblies (10) and two lifting devices (20), wherein the conveying line assemblies (10) are used for conveying pallets (1), the conveying line assemblies (10) are U-shaped, the conveying line assemblies (10) are provided with a feeding end and a discharging end, two conveying lines are correspondingly arranged at intervals from top to bottom, the two lifting devices (20) are respectively arranged at the feeding end and the discharging end, one lifting device (20) is used for conveying pallets (1) from the conveying line assemblies (10) located below to the conveying line assemblies (10) located above, and the other lifting device is used for conveying pallets (1) from the conveying line assemblies (10) located above to the conveying line assemblies (10) located below;

the conveying line assembly (10) comprises a plurality of conveying modules (100), the conveying modules (100) are connected in the straight line direction, the conveying modules (100) comprise two groups of roller groups (110) which are oppositely arranged, a plurality of first rollers (111) are arranged in each group of roller groups (110) side by side and at intervals, the first rollers (111) are fixedly connected with multi-wedge belt wheels (112), a transmission belt (113) is arranged between two adjacent multi-wedge belt wheels (112) in a winding mode, and a driving motor (115) for driving the first rollers (111) to rotate is arranged in each conveying module (100);

wherein, transportation line assembly (10) include straightway (120) and bend section (130), two bend section (130) wherein one end fixed connection, the other end with straightway (120) fixed connection makes transportation line assembly (10) are the U-shaped the outside edge of transportation line assembly (10) is provided with detection device, detection device is used for detecting whether to place the work piece on tray (1), wherein, detection device is provided with the controller that has infrared receiving function, controller and a plurality of driving motor (115) electric connection, tray (1) are provided with infrared transmitter, infrared transmitter can with the controller electricity is connected.

2. The endless conveyor according to claim 1, characterized in that in a single transfer module (100), a linkage rod (114) is connected between two first rollers (111) of two sets of rollers (110), and that any one of the first rollers (111) is connected with the drive motor (115).

3. The circulating conveying device according to claim 1, characterized in that a processing station (11) is arranged on the conveying line assembly (10), and a lifting mechanism (200) for driving the tray (1) to lift is arranged on the processing station (11).

4. A circulation conveying device according to claim 3, characterized in that the lifting mechanism (200) is provided with a second roller (230) for driving the tray (1) to translate, one side of the processing station (11) is provided with a steering mechanism (300) for driving the tray (1) to turn 180 degrees, the steering mechanism (300) is provided with a third roller (330) for driving the tray (1) to translate, the rolling directions of the second roller (230) and the third roller (330) are consistent, wherein the lifting mechanism (200) can drive the tray (1) to lift and enable the tray (1) to be located at a first position and a second position, the first position and the second position are sequentially arranged from bottom to top, and when the tray (1) is located at the first position, the tray (1) is contacted with the first roller (111); when the tray (1) is in the second position, the uppermost end of the lifting mechanism (200) is flush with the uppermost end of the steering mechanism (300).

5. The endless conveyor according to claim 4, characterized in that the lifting mechanism (200) comprises a mounting plate (210) and a lifting cylinder (220), the second roller (230) being rotatably mounted on the mounting plate (210), the lifting cylinder (220) being connected to the bottom of the mounting plate (210) and being adapted to drive the mounting plate (210) to lift.

6. The endless conveyor according to claim 4, characterized in that the steering mechanism (300) comprises a rotating table (310) and a rotating motor (320) for driving the rotating table (310) to rotate, the third roller (330) is rotatably mounted on the rotating table (310), and the rotating motor (320) is fixedly connected with the bottom of the rotating table (310).

7. The circulating conveying apparatus according to claim 6, wherein an electric limiter (311) and a photoelectric sensing assembly (312) are disposed on the rotating table (310), and the photoelectric sensing assembly (312) and the electric limiter (311) are electrically connected to drive the electric limiter (311) to restrict the position of the tray (1).

8. The circulation conveying device according to claim 1, wherein the lifting device (20) comprises two sets of oppositely arranged lifting assemblies (21), the lifting assemblies (21) comprise two rotating shafts (211), synchronous belts (212) and supporting plates (213), the two rotating shafts (211) are arranged at intervals in the vertical direction, the synchronous belts (212) are wound on the two rotating shafts (211) so that the two rotating shafts (211) and the synchronous belts (212) are in transmission fit, the supporting plates (213) are fixedly mounted on the surface of the synchronous belts (212) in the horizontal direction, a plurality of fourth rollers (2131) are arranged on the supporting plates (213) at intervals in the length direction of the supporting plates (213), and the supporting plates (213) in the two lifting assemblies (21) are in one-to-one correspondence so as to form a space (2133) between the corresponding two supporting plates (213).

9. Work pallet conveying method for controlling a circulation conveyor according to any one of claims 1 to 8, two of said conveyor line assemblies (10) comprising an upper conveyor line assembly (10A) and a lower conveyor line assembly (10B), two of said lifting devices (20) comprising a first lifting device (20A) and a second lifting device (20B), said first lifting device (20A) being adapted to continuously lift the pallet (1) upwards, said second lifting device (20B) being adapted to continuously transport the pallet (1) downwards, said detection means comprising an upper detection means and a lower detection means, said upper detection means being located outside said upper conveyor line assembly (10A) and being electrically connected to said upper conveyor line assembly (10A), said lower detection means being located outside said lower conveyor line assembly (10B) and being electrically connected to said lower conveyor line assembly (10B), characterized in that it comprises the steps of:

s100: the user continuously puts the workpiece into the tray (1) in the first lifting device (20A);

s200: the tray (1) is transported from bottom to top in the first lifting device (20A), and is moved to the feeding end of the upper transport line assembly (10A) from the discharging end of the lower transport line assembly (10B);

s300: the tray (1) moves on the upper conveying line assembly (10A);

s400: the tray (1) moves into corresponding processing equipment, transportation is stopped, and workpieces on the tray (1) are processed by the processing equipment;

s500: the tray (1) is transported on the upper transport line assembly (10A), and passes through the upper detection device, the upper detection device detects whether the tray (1) has a workpiece or not, and if the tray (1) has no workpiece, the step S510 is performed; if the tray (1) has a workpiece, performing step S520;

s510: the controller of the upper detection device is used for controlling the upper conveying line assembly (10A) to stop, and the step S600 is continued after the workpieces are taken out of the processing equipment and put back into the tray (1);

s520: the controller of the upper detection device is used for controlling the upper conveying line assembly (10A) to continue to work, and the step S600 is continued;

s600: the second lifting device (20B) conveys the tray (1) from the discharge end of the upper conveying line assembly (10A) to the feed end of the lower conveying line assembly (10B) and takes down the workpiece;

s700: the tray (1) is transported on the lower transportation line assembly (10B), and passes through the lower detection device, the lower detection device detects whether the tray (1) is provided with a workpiece, and if the tray (1) is provided with the workpiece, the step S710 is performed; if the tray (1) does not have the workpiece, proceeding to step S720;

s710: the controller of the lower detection device is used for controlling the upper conveying line assembly (10A) to stop, and the step S800 is continued after the workpieces are taken out of the tray (1);

s720: the controller of the lower detection device is used for controlling the upper conveying line assembly (10A) to continue to work, and the step S800 is continued;

s800: the tray (1) is transported to the first lifting device (20A) by the lower transport line assembly (10B);

s900: the above steps S100 to S800 are repeated.

10. The workpiece pallet conveying method according to claim 9, wherein the circulating conveying device further comprises a lifting mechanism (200) and a steering mechanism (300), the lifting mechanism (200) is located in the conveying line assembly (10), the steering mechanism (300) is located on one side of the conveying line assembly (10) and is arranged corresponding to the lifting mechanism (200), the lifting mechanism (200) can drive the pallet (1) to lift and enable the pallet (1) to be located at a first position and a second position, the first position and the second position are sequentially arranged from bottom to top, and when the pallet (1) is located at the first position, the pallet (1) is contacted with the first roller (111); when the tray (1) is positioned at the second position, the uppermost end of the lifting mechanism (200) is flush with the uppermost end of the steering mechanism (300);

the workpiece tray conveying method comprises the following steps of:

s300: the tray (1) moves on the upper conveying line assembly (10A), and if the workpiece needs to be turned, the step S310 is performed; if the workpiece does not need to be turned, performing step S400;

s310: the tray (1) enters the lifting mechanism (200) along with the upper conveying line assembly (10A) and is lifted to a second position by the lifting mechanism (200), and step S320 is performed;

s320: step S330 is performed by the lifting mechanism (200) being matched with the steering mechanism (300) to enable the tray (1) to enter the steering mechanism (300);

s330: the steering mechanism (300) rotates the tray (1) by 180 degrees to turn the workpiece by 180 degrees, and the step S340 is performed;

s340: the steering mechanism (300) is matched with the lifting mechanism (200) to enable the steered tray (1) to enter the lifting mechanism (200), and step S350 is carried out;

s350: the lifting mechanism (200) descends to a first position, so that the tray (1) is contacted with the first roller (111), and the step S400 is performed;

s900: the above steps S100 to S800 are repeated.