CN111634756A

CN111634756A - Full-automatic disk feeding machine

Info

Publication number: CN111634756A
Application number: CN202010414487.3A
Authority: CN
Inventors: 朱庆德; 王玉敏; 石宗恒; 范秀增
Original assignee: Henan Xigong Mechanical & Electrical Equipment Co ltd
Current assignee: Henan Xigong Mechanical & Electrical Equipment Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-09-08
Anticipated expiration: 2040-05-15
Also published as: CN111634756B

Abstract

The invention provides a full-automatic tray supply machine which can continuously provide plastic trays with accurate positioning for an automatic layer winding machine. The plastic disc overturning device comprises a disc storage box for storing plastic discs, wherein an outlet of the disc storage box is connected with an overturning mechanism, and the plastic discs are overturned onto a spiral conveying shaft of a disc conveying mechanism by the overturning mechanism; set up plastic tray feed mechanism in the frame, automatic positioning mechanism fixes a position the epaxial plastic tray that is located the auger delivery, can pinpoint the spatial position that the plastic tray was put through locating lever and photoelectric sensor, and the positive and negative of automatic identification plastic tray guarantees that the plastic tray openly goes out the dish. The single automatic disk supply machine can automatically and continuously supply disks for a plurality of layer winding machines. The tray storage box can store about 60 plastic trays each time, the tray storage amount is large, tray loading can be achieved once, and long-time full-automatic operation can be achieved. And a diskless detection mechanism is arranged, so that automatic alarm prompt can be realized when no diskettes exist.

Description

Full-automatic disk feeding machine

Technical Field

The invention relates to the field of welding wire production, in particular to a full-automatic wire feeding machine.

Technical Field

The last step of welding wire production is a layer winding process, namely, finished welding wires are orderly and densely arranged on a winding reel (plastic disc). To improve productivity and reduce labor intensity, the process requires automatic layer winding operations, and equipment capable of continuously providing precisely positioned plastic trays for automatic layer winding machines is needed.

Disclosure of Invention

The invention provides a full-automatic tray supply machine which can continuously provide plastic trays with accurate positioning for an automatic layer winding machine.

The object of the invention is achieved in the following way:

a plastic disc feeding mechanism comprises a disc storage box for storing plastic discs, wherein an outlet of the disc storage box is connected with a turnover mechanism, and the turnover mechanism turns over the plastic discs to a spiral conveying shaft of a disc conveying mechanism; the plastic plate overturning device is characterized in that a guide inclined plate is arranged in the plate storage box, the tail end of the guide inclined plate is provided with an overturning mechanism A, the plastic plate is overturned by the overturning mechanism A and then is conveyed to an overturning mechanism B, and the plastic plate is overturned by the overturning mechanism B and then is conveyed to a spiral conveying shaft.

The two sides of the guide inclined plate are connected with the disc storage box, and the guide inclined plate is provided with an inclination angle along the rolling direction of the plastic disc; the front end and the rear end of the guide inclined plate are both bent, and the distance between the rear end of the guide inclined plate and the inner wall of the tray storage box is slightly larger than the diameter of the plastic tray.

The turnover mechanism A and the turnover mechanism B respectively comprise an actuating mechanism cylinder, a piston rod and a turnover plate; the lower end of the piston rod is connected with the upper end of the swing arm, the lower end of the swing arm is hinged with the rotating shaft, the turnover plate is fixed on the rotating shaft, and the two ends of the rotating shaft are connected into the disc storage box through bearings; and the turnover plate is an arc-shaped plate.

The spiral conveying shaft is provided with a spiral line protruding along the circumferential surface, the spiral line does not completely cover the spiral conveying shaft, and the length of an optical axis uncovered by the spiral line is slightly larger than the thickness of the plastic disc; and a positioning block is arranged at the shaft shoulder at one end of the two spiral conveying shafts with the optical shaft.

The disc feeding mechanism comprises a speed reducing motor, the speed reducing motor is connected with a driving belt pulley through a coupler and a fixed shaft, and the driving belt pulley is connected with two driven belt pulleys through an annular synchronous belt; the two driven belt pulleys are respectively arranged on the two spiral conveying shafts; the shaft necks at the two ends of the two spiral conveying shafts are fixed on the frame through the supporting bearings.

The invention also comprises a plastic-disk-free detection mechanism which detects the storage condition of the plastic disks in the disk storage box; the plastic-free disc detection mechanism comprises two fixed seats arranged on the rack, and a photoelectric switch B is arranged on each fixed seat; the left side and the right side of the tray storage box are provided with through holes, and light of one photoelectric switch B enters from one through hole, penetrates out from the other through hole and is received by the other photoelectric switch B.

The full-automatic tray supplying machine of any plastic tray feeding mechanism comprises a frame, wherein the plastic tray feeding mechanism is arranged on the frame, after plastic trays are conveyed to a spiral conveying shaft, the plastic trays positioned on the spiral conveying shaft are positioned by an automatic positioning mechanism, and after the plastic trays are positioned, the plastic trays are lifted by a lifting mechanism, so that the mechanical arm is convenient to grab.

The automatic positioning mechanism comprises a cylinder C, a piston rod of the cylinder C is fixedly connected with the support through an L-shaped rod, an extension part is further arranged on the side of the L-shaped rod, and a proximity switch is fixed on the L-shaped rod; a vertical rod is fixed at the foremost end of the support, the tail end of the vertical rod is hinged to the middle of the positioning rod through a rotating shaft, and the extending length of the front end part of the positioning rod is larger than that of the foremost end of the extending part; a return spring is arranged between the front end of the positioning rod and the L-shaped rod extension part, and the rear end of the positioning rod extends to the upper part of the proximity switch; when the positioning rod is pulled by the return spring and rotates around the rotating shaft, the rear end of the positioning rod and the position of the proximity switch are changed.

Two photoelectric switches A for judging the front and back of the plastic disc are arranged on the rack, and light rays emitted by one photoelectric switch A can pass through the single-side through hole on the front of the plastic disc and are received by the other photoelectric switch A.

The lifting mechanism comprises a lifting cylinder and a rotary cylinder, a piston rod on the lifting cylinder is connected with a base of the rotary cylinder, a lifting seat is fixed on the piston rod of the rotary cylinder, and a limit groove is formed in the lifting seat; the lifting mechanism further comprises a guide rail and a proximity switch sensor, wherein the guide rail is arranged on the rack, and the proximity switch sensor is arranged on the guide rail.

The invention has the beneficial effects that:

1. the space position of the plastic disc can be accurately positioned through the positioning rod and the photoelectric sensor, the front side and the back side of the plastic disc are automatically identified, and the plastic disc is guaranteed to be discharged from the front side.

2. The single automatic disk supply machine can automatically and continuously supply disks for a plurality of layer winding machines. The tray storage box can store about 60 plastic trays each time, the tray storage amount is large, tray loading can be achieved once, and long-time full-automatic operation can be achieved. And a diskless detection mechanism is arranged, so that automatic alarm prompt can be realized when no diskettes exist.

3. The equipment is small in size, convenient to install and small in occupied assembly line area.

4. The equipment is provided with an independent control system, and can be independently installed and debugged and operated online with subsequent layers of winding equipment, so that other equipment does not need to be shut down during installation and debugging.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a left side view of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is an enlarged partial view of the automatic positioning mechanism;

fig. 5 is a schematic view of a plastic tray.

Wherein: the device comprises a limiting block 01, a single-side through hole 02, a plastic disc side inner hole 03, a rack 1, a disc storage box 2, a guide inclined plate 3, a cylinder A4, a turnover mechanism A5, a cylinder B6, a turnover mechanism B7, a speed reduction motor 8, a driving belt pulley 9, a driven belt pulley 10, a spiral conveying shaft 11, a support bearing 12, a positioning block 13, a cylinder C14, a support 15, a positioning rod 16, a reset spring 17, a proximity switch 18, a photoelectric switch A, a lifting cylinder 20, a rotating cylinder 21, a lifting seat 22, a guide rail 23, a proximity switch sensor 24, a fixing seat 25, a photoelectric switch B26, an L-shaped rod 27, an extension part 28 and a vertical rod 29.

Detailed Description

As shown in fig. 1, a full-automatic tray supplying machine comprises a frame 1, wherein a tray storage box 2, a turnover mechanism, a tray feeding mechanism, an automatic positioning mechanism, a lifting mechanism and a plastic-free tray detection mechanism are arranged on the frame 1. Wherein, be equipped with the plastic tray in the storage tray case 2, the plastic tray storage condition of no plastic tray detection mechanism detection storage tray case the inside, tilting mechanism is connected in the exit of storage tray case, and tilting mechanism overturns the plastic tray to the auger delivery axle 11 that send a set mechanism on, later, automatic positioning mechanism fixes a position the plastic tray that is located auger delivery axle 11, after the location, by lifting the mechanism with the plastic tray height of holding in the palm, makes things convenient for the arm to snatch.

As shown in fig. 1, the plastic trays are manually placed in the tray storage box 2, and about 60 plastic trays can be stored in the tray storage box 2 each time; the plastic reel is a plastic wire coil, is a coil for loading or winding wires, and can be called as a cable reel, a spool, a rubber shaft, an I-shaped wheel, a wire winding disc, a packaging disc, a finished product disc, a wire winding disc and the like due to different regions and different purposes. In the tray storage box, after the plastic trays on the lower layer are taken away, the plastic trays on the upper layer automatically roll down along the guide inclined plate 3 to enter the original position of the plastic trays on the lower layer.

Firstly, the plastic trays are manually placed one by one on the guide inclined plate 3 in the tray storage box 2 and are sequentially arranged. The tail end of the guide inclined plate 3 is provided with a turnover mechanism A5, a turnover mechanism A5 turns over and faces a turnover mechanism B7, and a turnover mechanism B7 turns over and faces the spiral conveying shaft. When the turnover mechanism works, the plastic disc rolls along the guide inclined plate and falls onto the turnover mechanism A5 of the turnover mechanism, after the turnover mechanism A5 is full, the plastic disc is turned over onto the turnover mechanism B7, and then the plastic discs are sequentially placed on the guide inclined plate 3 until the guide inclined plate 3 is full. Thus, the plastic tray on the turnover mechanism A5 is a secondary bottom layer plastic tray, and the plastic tray on the turnover mechanism B7 is a bottom layer plastic tray; then, the tray-free detection mechanism detects that there is no plastic tray on the conveying screw, and the turnover mechanism B7 turns over all the plastic trays on the bottom layer onto the conveying screw. The plastic disc on the spiral conveying shaft is a positioning plastic disc.

The two sides of the inclined guide plate 3 are connected with the disc storage box 2, the inclined guide plate inclines for a certain angle along the rolling direction of the plastic disc, and the rear end part of the inclined guide plate is bent to strengthen the strength of the inclined guide plate 3. The guide sloping plate 3 is lower than the outer edge of the disc storage box 2, so that the upper edge of the disc storage box 2 can limit the plastic disc. The distance between the rear end part of the guide inclined plate 3 and the inner wall of the tray storage box 2 is slightly larger than the diameter of the plastic tray, the front end part is bent, the height of the edge is increased, and therefore the plastic tray can conveniently fall to a secondary bottom layer, and enough plastic trays can be placed on the guide inclined plate 3. After the secondary bottom plastic tray on the turnover mechanism A5 is taken away, the plastic tray on the upper layer automatically rolls down along the guide sloping plate 3 and enters the position of the secondary bottom plastic tray.

The turnover mechanisms A and B respectively comprise an actuating mechanism cylinder, a piston rod and a turnover plate. The actuating mechanism of tilting mechanism and lift mechanism in this patent application can be any one of pneumatic, hydraulic drive and electronic three kinds of forms. This embodiment is described in detail in a pneumatic manner.

In every tilting mechanism, the cylinder body of actuating mechanism cylinder is fixed on storage dish case 2 lateral walls, and there are gas circuit control valve and trachea on the cylinder, and swing arm upper end is connected to the piston rod lower extreme, and the lower extreme of swing arm is articulated with the rotating shaft, and the returning face plate is fixed on the rotating shaft, and the rotating shaft both ends are passed through the bearing and are connected in the storage dish incasement. When a piston rod of the air cylinder extends or contracts, the swing arm rotates around the rotating shaft to drive the turnover plate to rotate around the rotating shaft. The section of the turnover plate is an arc-shaped plate, and the arc surface is tangent to the outer edge of the plastic plate placed on the arc-shaped plate. Specifically, when the piston rod of the air cylinder A4 extends and contracts, the turnover plate A of the turnover mechanism A5 is driven to rotate, and when the piston rod of the air cylinder B6 extends and contracts, the turnover plate B of the turnover mechanism B7 is driven to move.

As shown in fig. 1, after the plastic tray is placed on the turnover plate a of the turnover mechanism a5, the piston rod of the cylinder a4 contracts to drive the turnover plate a to rotate clockwise by a specific angle, so as to separate the bottom layer plastic tray from the secondary bottom layer plastic tray. Spiral delivery epaxial be that location plastic tray snatchs the back by arm (not this patent application part), cylinder B6's piston rod shrink drives tilting mechanism B7's returning face plate B anticlockwise rotation certain angle, on the spiral delivery dish mechanism is all overturned to bottom plastic tray, then cylinder B6 piston rod stretches out, drives returning face plate B clockwise turning and resets. The piston rod of the air cylinder A4 extends out after the turnover plate B rotates to reset, the turnover plate A is driven to rotate anticlockwise to reset, and at the moment, the secondary bottom layer plastic disc enters the bottom layer. And the upper layer plastic plate falls onto the turnover plate A in sequence, and the steps are repeated.

As shown in fig. 2, the disc feeding mechanism includes a speed reducing motor 8, the speed reducing motor 8 is fixed on the frame 1, the speed reducing motor 8 is connected with a driving pulley 9 through a coupling and a fixing shaft, and the driving pulley 9 is connected with two driven pulleys 10 with the same size through an annular synchronous belt. Two driven pulleys 10 are mounted on two conveying screw shafts 11, respectively. Two ends of the two spiral conveying shafts 11 are fixed on the frame 1 through shaft journals 12. After the installation is finished, the distance between the inner sides of the two spiral conveying shafts 11 is smaller than the diameter of the side plate of the plastic disc, so that the plastic disc can be placed on the spiral conveying shafts 11. The spiral conveying shaft 11 is provided with a spiral line protruding along the circumferential surface, the spiral line does not completely cover the spiral conveying shaft 11, and the length of an optical axis uncovered by the spiral line is slightly larger than the thickness of the plastic disc. A positioning block 13 is arranged at the shaft shoulder of one end of the two spiral conveying shafts 11 with the optical shaft.

As shown in fig. 2, what was on the auger delivery axle is that the location plastic tray was snatched the back by arm (not this patent application part), cylinder B's piston rod shrink, drive tilting mechanism B7 anticlockwise rotation specific angle, with the plastic tray upset, fall on two auger delivery axles 11 of tray feeding mechanism, gear motor 8 drives two auger delivery axles 11 rotatoryly through the belt drive, the protruding spiral line in two auger delivery axle 11 surfaces pushes away the plastic tray to the one end of no spiral line optical axis, because locating piece 13 provides axial positioning for the plastic tray, the plastic tray continues to rotate at the optical axis department along with auger delivery axle 11.

As shown in fig. 3-4, the automatic positioning mechanism includes a cylinder C14, and the cylinder C14 is fixed on the frame 1. The piston rod of the cylinder C14 is connected with the support 15, and the piston rod of the cylinder moves to drive the support 15 to move linearly. Specifically, as shown in fig. 4, the end of the piston rod of the cylinder is fixedly connected to the support 15 through an L-shaped rod 27, an extension portion 28 is further disposed on the side of the L-shaped rod 27, and the proximity switch 18 is fixed on the L-shaped rod 27; the most front end of the support 15 is fixed with a vertical rod 29, the tail end of the vertical rod 29 is hinged in the middle of the positioning rod 16 through a rotating shaft, and the overhanging length of the front end part of the positioning rod 16 is greater than the most front end of the extension part 28. A return spring 17 is provided between the front end of the positioning rod 16 and the L-shaped rod extension 28, and the rear end of the positioning rod 16 extends above the proximity switch 18. When the positioning lever 16 is pulled by the return spring 17 and rotates around the rotation axis, the positions of the rear end of the positioning lever 16 and the proximity switch 18 change.

The piston rod of the cylinder C14 extends out, and the L-shaped rod 27 drives the support 15 to integrally move leftwards, so that the positioning rod 16 extends into a positioning plastic disc on the spiral conveying shaft. As shown in fig. 5, a limiting block 01 is arranged on the plastic disc, the limiting block 01 is located in a side inner hole 03 outside a rotating shaft of the plastic disc, the limiting block 01 is cylindrical, and an axis of the limiting block 01 is parallel to the rotating shaft of the positioning plastic disc. When the positioning plastic disc rotates along with the spiral conveying shaft 11, the positioning rod 16 touches the limiting block 01. Because the overhanging length of the front end part of the positioning rod 16 is greater than the foremost end of the extension part 28, the positioning rod 16 firstly touches the limit block 01, the positioning plastic disc rotates clockwise, the front end of the positioning rod 16 faces downwards, the return spring 17 is stretched, the rear end of the positioning rod 16 faces upwards and is far away from the proximity switch 18, and the proximity switch 18 sends a signal to indicate that the positioning plastic disc reaches the axial preset position. That is to say, locating lever 16 is driven by the piston rod and is inserted in rotating plastics dish side hole 03, as shown in fig. 4, because two auger delivery axle 11 are rotating in the syntropy always, the plastics dish that the propelling movement arrived the optical axis region can rotate at the optical axis part because inertia and frictional force effect, plastics dish rotates the in-process, locating lever 16 is close gradually and touch the stopper 01 on the plastics dish, reset spring is stretched this moment, locating lever 16 anticlockwise rotation, proximity switch sensor 18 response and signals this moment, judge that plastics dish rotates the assigned position promptly, gear motor 8 shuts down simultaneously.

Two photoelectric switches A19 are installed on the frame 1, one photoelectric switch A emits light, and the other photoelectric switch receives light for judging the front and back of the plastic disc. It should be noted that the front surface of the plastic tray is provided with a single-side through hole 02, and the back surface of the plastic tray is a complete plane. And during operation, the plastic disc is placed vertically, that is, the rotating shaft of the plastic disc is parallel to the spiral conveying shaft 11, so that a certain angle needs to be set when the two photoelectric switches A are installed, that is, the two photoelectric switches A are located at different heights, as shown in fig. 3, so that light emitted by one photoelectric switch can pass through the single-side through hole 02 and be received by the other photoelectric switch A. After the speed reducing motor 8 is stopped, if the two photoelectric switches 19 receive light rays passing through the single-side through holes at the front fixed positions of the plastic disc, the photoelectric switches are switched on, and the plastic disc is judged to be the front. And if the photoelectric switch is not switched on, judging that the plastic disc is the reverse side.

After the proximity switch sensor 18 and the photoelectric switch a19 both send out sensing signals, the automatic positioning mechanism can detect that the plastic tray is positioned on the optical axis parts of the two spiral conveying shafts 11, and can also detect the front side of the plastic tray, so that the system judges the position of the plastic tray.

After the position judgment is completed, the plastic disc is pushed out by the lifting mechanism, the piston rod of the air cylinder C14 is reset, the positioning rod 16 and the reset spring 17 are reset, and the position state of the positioning rod and the proximity switch sensor 18 returns to the initial position.

As shown in fig. 1, the lifting mechanism comprises a lifting cylinder 20, a rotating cylinder 21, a piston rod on the lifting cylinder 20 is connected with a base of the rotating cylinder 21, a lifting seat 22 is fixed on the piston rod of the rotating cylinder 21, a limiting groove is arranged on the lifting seat, the cross section of the limiting groove can be a V shape, an arc surface shape or a rectangle shape, etc., the plastic disc is limited to roll on the lifting seat 22, and the lifting seat 22 is slightly wider than the thickness of the plastic disc. The lifting mechanism further comprises a guide rail 23 and a proximity switch sensor 24, wherein the guide rail 23 is arranged on the rack 1, the proximity switch sensor 24 is arranged on the guide rail 23, the proximity switch sensor 24 is a Hall sensor, the width of the lifting seat 22 is larger than the diameter of a piston rod of the lifting cylinder, and when the piston rod of the lifting cylinder extends out of the position of the proximity switch sensor 24, the proximity switch sensor 24 sends a signal.

After the position of the plastic tray is judged, the piston rod on the lifting cylinder 20 extends out, and the lifting seat 22 fixed on the rotating cylinder moves linearly along the guide rail 23 until the plastic tray at the optical axis position on the two spiral conveying shafts 11 is lifted out of the spiral conveying shafts 11. At this time, according to the judgment result of the photoelectric switch A19, if the front and back of the plastic disk are wrong, the rotary cylinder 21 rotates 180 degrees, and the plastic disk is adjusted to the front position from the back.

The proximity switch sensor 24 detects that the plastic tray is lifted to a designated position, and sends a signal, and the mechanical arm (not part of this patent application) grabs the plastic tray. The piston rod of the lifting cylinder 20 contracts to drive the rotating cylinder 21 and the lifting seat 22 fixed on the rotating cylinder to reset. Then the speed reducing motor 8 is started to drive the driving wheel 9, the driving wheel is transmitted to the driven wheel 10 through the synchronous belt, the spiral conveying shaft 11 is driven to rotate, and the plastic disc is continuously pushed to the optical axis position of the spiral conveying shaft 11.

The above steps are repeated until the positioning plastic tray on the spiral conveying shaft 11 is used up.

The linear guide rail 23, the lifting seat 22 and the lifting cylinder 20 on the lifting mechanism must be vertically installed and are arranged on the center line of the two spiral conveying shafts 11. This ensures that the plastic tray does not roll when it is lifted.

The plastic-free disc detection mechanism comprises two fixed seats 25 arranged on a rack, and a photoelectric switch B26 is arranged on each fixed seat 25. As shown in fig. 3, through holes are formed at the designated positions of the left and right sides of the tray box 2 for light to pass through, and the fixing base 25 provided with the photoelectric switches B26 is installed at the designated position of the rack 1, so that the light of one photoelectric switch B enters from one through hole, passes through from the other through hole and is received by the other photoelectric switch B. As shown in fig. 3, light passes through the 2 nd plastic tray from last and the through hole on the tray storage box 2, and after the 2 nd plastic tray from last enters the position of the optical axis of the spiral conveying shaft 11, the photoelectric switch B26 is switched on to give an alarm, which prompts the addition of the plastic tray. The 2 nd last plastic tray refers to the 2 nd rightmost plastic tray as shown in fig. 3.

After receiving the alarm signal, the turnover mechanism completely turns the bottom plastic tray over the two spiral conveying shafts 11, and the steps are repeated until all the plastic trays in the tray storage box are used up.

In the present application, the cylinder a4, the cylinder B6, the reduction motor 8, the cylinder C14, the proximity switch 18, the photoelectric switch a19, the lift cylinder 20, the rotating cylinder 21, the proximity switch sensor 24, and the photoelectric switch B26 are all connected to a control system, and the control system controls the start and stop of the above components, which is well known to those skilled in the art.

Claims

1. The utility model provides a plastics dish feed mechanism which characterized in that: the plastic disc overturning device comprises a disc storage box (2) for storing plastic discs, wherein an outlet of the disc storage box is connected with an overturning mechanism, and the overturning mechanism overturns the plastic discs to a spiral conveying shaft (11) of a disc conveying mechanism; the plastic plate overturning device is characterized in that a guide inclined plate (3) is arranged in the plate storage box (2), the tail end of the guide inclined plate (3) is provided with an overturning mechanism A (5), the plastic plate is overturned by the overturning mechanism A (5) and then conveyed to an overturning mechanism B (7), and the plastic plate is overturned by the overturning mechanism B (7) and then conveyed to a spiral conveying shaft (11).

2. A plastic tray feeding mechanism according to claim 1, wherein: two sides of the inclined guide plate (3) are connected with the disc storage box (2), and an inclined angle is formed in the inclined guide plate (3) along the rolling direction of the plastic disc; the front end and the rear end of the guide inclined plate (3) are both bent, and the distance between the rear end of the guide inclined plate (3) and the inner wall of the tray storage box (2) is slightly larger than the diameter of the plastic tray.

3. A plastic tray feeding mechanism according to claim 1, wherein: the turnover mechanism A (5) and the turnover mechanism B (7) respectively comprise an actuating mechanism cylinder, a piston rod and a turnover plate; the lower end of the piston rod is connected with the upper end of the swing arm, the lower end of the swing arm is hinged with the rotating shaft, the turnover plate is fixed on the rotating shaft, and the two ends of the rotating shaft are connected into the disc storage box through bearings; and the turnover plate is an arc-shaped plate.

4. A plastic tray feeding mechanism according to claim 1, wherein: the spiral conveying shaft (11) is provided with a spiral line protruding along the circumferential surface, the spiral line does not completely cover the spiral conveying shaft (11), and the length of an optical axis uncovered by the spiral line is slightly larger than the thickness of the plastic disc; a positioning block (13) is arranged at the shaft shoulder of one end of the two spiral conveying shafts (11) with the optical shaft.

5. A plastic tray feeding mechanism according to claim 4, wherein: the disc feeding mechanism comprises a speed reducing motor (8), the speed reducing motor (8) is connected with a driving belt pulley (9) through a coupler and a fixed shaft, and the driving belt pulley (9) is connected with two driven belt pulleys (10) through an annular synchronous belt; the two driven belt pulleys (10) are respectively arranged on the two spiral conveying shafts (11); two ends of the screw conveying shafts (11) are fixed on the frame (1) through shaft necks of the support bearings (12).

6. A plastic tray feeding mechanism according to claim 1, wherein: the plastic disk storage box is characterized by also comprising a plastic disk-free detection mechanism, wherein the plastic disk-free detection mechanism is used for detecting the storage condition of the plastic disks in the disk storage box; the plastic-free disc detection mechanism comprises two fixed seats (25) arranged on the rack, and a photoelectric switch B (26) is arranged on each fixed seat; the left side and the right side of the disc storage box (2) are both provided with through holes, and light of one photoelectric switch B enters from one through hole, penetrates out from the other through hole and is received by the other photoelectric switch B.

7. A fully automatic tray feeder using the plastic tray feeding mechanism of any one of claims 1 to 6, characterized in that: including frame (1), set up plastics dish feed mechanism on frame (1), treat plastics dish conveying back on spiral delivery axle (11), automatic positioning mechanism fixes a position the plastics dish that is located spiral delivery axle (11), after the location, by lifting the mechanism with plastics dish height in the palm, make things convenient for the arm to snatch.

8. The full-automatic disk feeder according to claim 7, wherein: the automatic positioning mechanism comprises an air cylinder C (14), a piston rod of the air cylinder C (14) is fixedly connected with the support (15) through an L-shaped rod (27), an extension part (28) is further arranged on the side of the L-shaped rod (27), and a proximity switch (18) is fixed on the L-shaped rod (27); a vertical rod (29) is fixed at the foremost end of the support (15), the tail end of the vertical rod (29) is hinged to the middle of the positioning rod (16) through a rotating shaft, and the extending length of the front end part of the positioning rod (16) is greater than that of the foremost end of the extending part (28); a return spring (17) is arranged between the front end of the positioning rod (16) and the L-shaped rod extension part (28), and the rear end of the positioning rod (16) extends to the upper part of the proximity switch (18); when the positioning rod (16) is pulled by the return spring (17) and rotates around the rotating shaft, the positions of the rear end of the positioning rod (16) and the proximity switch (18) are changed.

9. The full-automatic disk feeder according to claim 7, wherein: two photoelectric switches A (19) used for judging the front and the back of the plastic disc are mounted on the frame (1), and light rays emitted by one photoelectric switch A can pass through a single-side through hole (02) in the front of the plastic disc and are received by the other photoelectric switch A.

10. The full-automatic disk feeder according to claim 7, wherein: the lifting mechanism comprises a lifting cylinder (20) and a rotary cylinder (21), a piston rod on the lifting cylinder (20) is connected with a base of the rotary cylinder (21), a lifting seat (22) is fixed on the piston rod of the rotary cylinder (21), and a limiting groove is formed in the lifting seat (22); the lifting mechanism further comprises a guide rail (23) and a proximity switch sensor (24), wherein the guide rail (23) is arranged on the rack (1), and the proximity switch sensor (24) is arranged on the guide rail (23).