Back-and-forth flow multi-directional discharging vibrating material tray, vibrating tray and feeding device thereof

Abstract

A reciprocating backflow multi-directional discharge vibrating material tray, a vibrating tray and a feeding device thereof, wherein the material tray is provided with independent first to Nth spiral tracks that spirally rise along the inner wall of the material tray, wherein N is an integer greater than or equal to 2, and the outlet section of each spiral track is tangent to the upper circle of the material tray, and is used to dock with the inlet of the reciprocating linear feeding track of the corresponding reciprocating linear feeder; a section of the spiral track that intersects with the return port of the reciprocating linear feeding track and is higher than the return port is cut off, and a bridge rail is set at the cutoff, a transition spiral track is provided on the upper surface of the bridge rail, and the transition spiral track connects the cut spiral track, and a return portion connected to the return port is provided below the bridge rail, and the gap between the upper surface of the return portion and the lower surface of the bridge rail is set to be greater than the thickness of a device. The present invention has the advantage of being able to dock with a reciprocating linear feeder.

Description

Technical Field

[0001] The invention relates to a reciprocating and returning flow multi-directional discharging vibrating material tray, a vibrating tray and a feeding device thereof. Background Art

[0002] Most of the existing vibrating discharging devices are single-track discharging devices. Since this type of vibrating discharging device is single-track, it has disadvantages such as limited discharging efficiency. The single-track discharging device can no longer meet the customers' needs for mass production. Generally, in order to increase the discharging rate, the only way is to increase the number of vibrating discharging devices. However, this will not only increase the cost of the machine, but also require a larger area to accommodate the machine, and also require more manpower to operate the machine, which increases the overall production cost.

[0003] Chinese patent document CN 107777255 A discloses a method for feeding materials using a multi-discharge piezoelectric conveying device and a multi-discharge piezoelectric conveying device, wherein the multi-discharge piezoelectric conveying device includes a bottom plate, a circular vibration source arranged on the bottom plate, a material tray driven by the circular vibration source and arranged on the circular vibration source, and at least two mutually independent spiral tracks are arranged in the material tray, and the outlet of each spiral track is connected to a reciprocating linear feeding track, and each of the reciprocating linear feeding tracks is driven by a corresponding straight vibration source. Although this multi-discharge piezoelectric conveying device has the advantages of higher feeding efficiency, higher utilization rate of the material tray, and lower cost, this multi-discharge piezoelectric conveying device is only suitable for use with a reciprocating linear feeding track with one-way discharge, and is not very suitable for a reciprocating linear feeder. This is because it is difficult to achieve docking with the return track of the reciprocating linear feeder when the external diameter of the existing circular vibration material tray remains unchanged. Summary of the invention

[0004] In order to overcome the above problems, the invention provides the society with a reciprocating return flow multi-directional discharging vibrating material tray that can be docked with a reciprocating linear conveyor.

[0005] Another object of the present invention is to provide the society with a vibrating plate that can be docked with a reciprocating linear conveyor.

[0006] The third object of the present invention is to provide the society with a feeding device that can be docked with a reciprocating linear conveyor.

[0007] The technical solution of the present invention is: to provide a reciprocating backflow multi-directional discharging vibrating material tray, in which the first to Nth spiral tracks that are independent of each other and spirally ascend along the inner wall of the material tray are provided, wherein N is an integer greater than or equal to 2, and the outlet section of each of the spiral tracks is tangent to the upper circle of the material tray, and is used to dock with the inlet of the reciprocating linear feeding track of the corresponding reciprocating linear feeder; a section of the spiral track that intersects with the return port of the reciprocating linear feeding track and is higher than the return port is cut off, and a bridge rail is set at the cutoff point, and a transition spiral track is provided on the upper surface of the bridge rail, and the transition spiral track is connected to the cut spiral track, and a return portion connected to the return port is provided below the bridge rail, and the gap between the upper surface of the return portion and the lower surface of the bridge rail is set to be larger than the thickness of a device.

[0008] As an improvement to the present invention, a plurality of device-guiding reflow grooves are provided on the upper surface of the reflow groove.

[0009] As an improvement to the present invention, the direction of the device leading to the reflow groove is set in the same direction as the disc feeding direction F as much as possible.

[0010] As an improvement to the present invention, the width of the transition spiral track is 1-1.2 times the thickness of a device.

[0011] As an improvement to the present invention, a through groove passing through the return portion is provided on the bridge rail, and an edge is formed between the through groove and the transition spiral track, and the height of the edge is less than the thickness of the device.

[0012] As an improvement to the present invention, a through groove passing through the return portion is provided on the bridge rail, and an edge is provided between the through groove and the transition spiral track, and the height of the edge is less than the thickness of the device.

[0013] As an improvement to the present invention, a static electricity removal device is provided on the bottom of the material tray.

[0014] As an improvement to the present invention, the static electricity removal device includes a base plate, and an upward protrusion is provided on the upper bottom surface of the base plate, and the circumference of the protrusion is transitionally connected with the circumference of the base plate through an arc surface to form a gyroscope with a high middle and a low edge; an annular groove that can be connected to an external ion wind source is provided on the lower bottom surface of the base plate, and a plurality of air outlet holes obliquely arranged in the same direction are provided on the circumferential side surface of the base plate, and the inner ends of the air outlet holes are connected with the annular groove.

[0015] As an improvement to the present invention, the plurality of air outlet holes obliquely arranged in the same direction are distributed tangentially to the circumference of the base circle D.

[0016] As an improvement to the present invention, the air outlet holes are distributed clockwise or counterclockwise.

[0017] As an improvement to the present invention, the diameter of the base circle D is greater than or equal to 80% of the outer ring size of the annular groove and less than or equal to 50% of the outer ring size of the annular groove.

[0018] As an improvement to the present invention, a step is provided on the outer circle of one side of the lower bottom surface of the bottom plate.

[0019] As an improvement to the present invention, a cavity portion is provided on one side of the lower bottom surface of the bottom plate directly facing the protrusion.

[0020] The present invention also provides a reciprocating flow type multi-directional material discharging vibration tray, comprising a vibration source and a material tray located on the vibration source, wherein the material tray is the reciprocating flow type multi-directional material discharging vibration tray mentioned above.

[0021] The present invention also provides a material feeding device, which includes the above-mentioned reciprocating and return-flow type multi-directional material discharging vibration plate.

[0022] The present invention cuts off a section of spiral track that intersects with the return port of the reciprocating linear feeding track and is higher than the return port, and sets a bridge track at the cutoff point. A transition spiral track is set on the upper surface of the bridge track, and the transition spiral track connects the cut spiral track. A return part connected to the return port is set below the bridge track, and the gap between the upper surface of the return part and the lower surface of the bridge track is set to be greater than the thickness of a device. In this way, it can not only achieve docking with the reciprocating linear feeder, but also achieve the return of the refluxed device to the tray without obstruction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the feeding device of the present invention.

[0024] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0025] Figure 3 yes Figure 1 Schematic diagram of the material tray breakdown structure.

[0026] Figure 4 yes Figure 3 Schematic diagram of the combined three-dimensional structure.

[0027] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure at B in FIG.

[0028] Figure 6 yes Figure 4 Schematic diagram of the enlarged structure at C in FIG.

[0029] Figure 7 yes Figure 3 Schematic diagram of the plan structure.

[0030] Figure 8 yes Figure 7 Enlarged structural diagram at point D in the middle.

[0031] Fig. 9 It is a schematic diagram of the main structure of the static electricity elimination device in the invention.

[0032] Fig.10 yes Fig. 9 Schematic diagram of the left view structure.

[0033] Fig.11 yes Fig.10 Schematic diagram of the AA cross-section structure.

[0034] Fig.12 yes Fig.11 Enlarged structural diagram at E.

[0035] Fig.13 yes Fig. 9 Schematic diagram of the BB cross-section structure.

[0036] Fig.14 yes Fig. 9 Schematic diagram of the front three-dimensional structure.

[0037] Fig.15 yes Fig. 9 Schematic diagram of the back three-dimensional structure. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the invention more clearly understood, the invention is described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the invention and are not used to limit the invention.

[0039] See also Figure 1 and Figure 2 , Figure 1 and Figure 2Disclosed is a feeding device, including a reciprocating multi-directional discharge vibration plate 100 (in this embodiment, only a two-way discharge vibration plate is used as an example for illustration. In fact, the content of the present invention is also applicable to a three-way discharge or four-way discharge, or a vibration plate with more than one direction of discharge, which will not be described in detail here). The reciprocating multi-directional discharge vibration plate 100 includes a vibration source 10 and a material plate 20 located on the vibration source 10, and the vibration source 10 is a circular vibration source; a reciprocating linear feeder 4, and the reciprocating linear feeder 4 includes a first reciprocating linear feeder 30 and a second reciprocating linear feeder 40. ; The first reciprocating linear feeder 30 includes a first straight vibration source 32 and a first reciprocating linear feeding track 31 located on the first straight vibration source 32; the second reciprocating linear feeder 40, the second reciprocating linear feeder 40 includes a second straight vibration source 42 and a second reciprocating linear feeding track 41 located on the second straight vibration source 42; the first reciprocating linear feeder 30 and the second reciprocating linear feeder 40 have the same structure, and the specific structure can be found in the content disclosed in Chinese Patent ZL201611071587.0, which will not be repeated here; the material tray 20 has the following structural features.

[0040] In this embodiment, the return flow multi-directional discharge vibration plate 100 is in a counterclockwise direction, so Figure 1 The overall structure is counterclockwise. Of course, the return flow multi-directional discharge vibration plate 100 can also be designed as a clockwise structure.

[0041] exist Figure 2 In the embodiment, a return track splash plate 92 is provided on the outer side of the return track 91 of the reciprocating linear feeder 4. The purpose of providing the return track 91 is to facilitate the return of the rejected devices on the feeding track to the return portion 52 of the material tray 20 after selection. The purpose of providing the return track splash plate 92 is to prevent the rejected devices from being blown out of the reciprocating linear feeder 4 by air.

[0042] exist Figure 2 and Figure 5 In the embodiment, the first end face 911 and the second end face 912 of the return track 91 and the end face 922 of the return track splash plate 92 exceed the boss face 6121 of the return portion 52, so that the device on the return track 91 can slide directly from the first end face 911 into the return portion 52. There is a predetermined gap between the second notch face 6112 of the notch 611 at the return of the return flow multi-directional discharge vibration plate 100 and the bottom surface (not shown) of the return track 91, a predetermined gap between the third notch face 6113 and the surface 921 of the return track splash plate 92, and a predetermined gap between the first notch face 6111 and the second end face 912 of the return track 91. All gaps are smaller than the minimum size of the device appearance. If they contact each other, both parties will not be able to work and make abnormal noises.

[0043] See also Figures 1 to 8 , Figures 1 to 8 The invention discloses a reciprocating multi-directional discharge vibrating material tray, wherein the material tray 20 is provided with a first spiral track 21 and a second spiral track 22 which are independent of each other and spirally ascend along the inner wall of the material tray 20. (In this embodiment, the invention is only described by taking the two-way discharge vibrating material tray as an example. In fact, the contents described in the invention are also applicable to the three-way discharge or four-way discharge, or the vibrating material tray with more than one direction of discharge, which will not be described in detail here. When the spiral track is the Nth spiral track, its number should be 2N, which is not shown in the figure.) The outlet section 3 of each of the spiral tracks 21, 22 is connected to the material tray 20. The upper circle is tangent to the inlet 411 of the reciprocating linear feeding track of the corresponding reciprocating linear feeder 4; a section of the spiral track that intersects with the return port 412 of the reciprocating linear feeding track and is higher than the return port 412 is cut off, and a bridge rail 5 is set at the cutoff point, and a transition spiral track 51 is provided on the upper surface of the bridge rail 5, and the transition spiral track 51 connects the cut spiral track, and a return portion 52 connected to the return port 412 is provided below the bridge rail 5, and the gap between the upper surface of the return portion 52 and the lower surface of the bridge rail 5 is set to be greater than the thickness of a device. Of course, it is best that the gap is set to be greater than the thickness of a device and less than the sum of the thicknesses of five devices.

[0044] Preferably, a plurality of device guiding reflux grooves 521 are provided on the upper surface of the reflux groove 52 .

[0045] Preferably, the direction of the device-guiding reflow groove 521 is arranged in the same direction as the disc feeding direction F as much as possible.

[0046] Preferably, the width of the transition spiral track 51 is 1-1.2 times the thickness of a device.

[0047] Preferably, a through groove 53 passing through the return portion 52 is provided on the bridge rail 5 , and an edge 531 is formed between the through groove 53 and the transition spiral track 51 , and the height of the edge 531 is less than the thickness of the device.

[0048] Specifically, the present invention is provided with a first spiral track 21 and a second spiral track 22 at the bottom of the material tray 20, the first spiral track 21 is composed of the first section LA1 of the first spiral track, the second section LA2 of the first spiral track, the third section LA3 of the first spiral track and the fourth section LA4 of the first spiral track, the first spiral track 21 has a first spiral track starting section 613 and a first spiral track outlet section 615 (the first spiral track outlet section 615 is one of the outlet sections 3); the second spiral track 22 is composed of the second spiral track first section LB1, the second spiral track second section LB2, the third section LB3 of the second spiral track fourth section LB4, the second spiral track 22 includes a second spiral track starting section 614 and a second spiral track outlet section 616 (the second spiral track outlet section 616 is another of the outlet sections 3), the first spiral track 21 and the second spiral track 22 have the same structure, and the first spiral track 21 and the second spiral track 22 are staggered up and down.

[0049] Due to the influence of the first spiral track 21 and the second spiral track 22, the present invention will deepen the depth of the material tray 20 when the diameter of the material tray 20 remains basically unchanged, so as to ensure that there is enough space for the second spiral track 22. In this way, relative to the first spiral track 21, the position of the return portion 52 connected to the return port 412 is lower than the position of the third section LA3 of the first spiral track, and relative to the second spiral track 22, the position of the return portion 52 connected to the return port 412 is lower than the position of the third section LB3 of the second spiral track. Therefore, the present invention cuts off the third section LA3 of the first spiral track at the return portion 2 and the third section LB3 of the second spiral track, that is, Figure 6 The area between the first section 6123 and the second section 6127 shown in the figure is provided with a suspended bridge rail 5, and a plurality of reflux grooves 521 close to the feeding direction F of the tray are provided on the upper bottom surface of the reflux portion 52. The refluxed devices flow out from the reflux grooves 521 through the gap below the bridge rail 5. At the outlet section 6124, some devices fall on the track surface 6125 of the second section LB2 of the second spiral track, and move toward the outlet section of the tray 20 along the second spiral track 22 again; some devices fall directly back to the inner bottom surface of the tray 20. The width of the track surface 6125 here is 1-1.3 times the width of a device, so that the excess refluxed devices can slide into the tray 20. The side end surface 6123 and the reflux groove 521 of the outlet section 6124 are arranged close to the feeding direction F of the tray. The closer to the feeding direction F of the tray, the smoother the reflux of the device. Figure 8 The side surface 6126 is a side wall surface of the track surface 6125 , and the side surface 6126 forms an angle of 90° with the track surface 6125 .

[0050] exist Figure 6 and Figure 8In the embodiment, a through groove 53 passing through the return portion 52 is provided on the bridge rail 5, and an edge 531 is provided between the through groove 53 and the transition spiral track 51, and the height of the edge 531 is less than the thickness of the device; it is convenient for another device overlapping on the device to fall from the through groove 53 into the return portion 52, or when many devices flow from the paths LA3 and LB3, the redundant devices are turned back into the return portion 52 from the edge 531. The track surface 6221 of the transition spiral track 51 and the track side surface 6222 of the transition spiral track 51 form an angle of 90°.

[0051] See also Figures 9 to 15 A static electricity removal device 7 is provided on the bottom of the material tray 20 . Figures 9 to 15 The present invention further illustrates the static electricity elimination device 7. As can be seen from the figure, the static electricity elimination device 7 comprises a base plate 1, on the upper bottom surface of the base plate 1 is provided with an upward protrusion 11, the circumference of the protrusion 11 is transitionally connected with the circumference of the base plate 1 through an arc surface 12 to form a gyroscope; on the lower bottom surface 13 of the base plate 1 is provided an annular groove 14 which can be connected to an external ion wind source (not shown), generally an ion fan, and on the circumferential side surface of the base plate 1 are provided a plurality of air outlet holes 15 obliquely arranged in the same direction, and the inner ends of the air outlet holes 15 are communicated with the annular groove 14. The ion wind coming out of the ion blower first enters the annular groove 14. Of course, when installing the static electricity elimination device 7, the static electricity elimination device 7 must first be fixed to the circular inner bottom surface of the vibration disk through the screw hole 101 and the screw rod, so that the annular groove 14 and the circular inner bottom of the vibration disk form a sealed and complete annular groove 14, and then, the ion wind is sent out through the air outlet 15 through the annular groove 14, so as to achieve the purpose of removing static electricity from the device and the feeding tray at a close distance.

[0052] Preferably, the plurality of air outlet holes 15 arranged obliquely in the same direction are distributed tangentially to the circumference of the base circle D. Fig.13 In the static electricity elimination device 7, the air outlet holes 15 can be distributed in a clockwise direction or a counterclockwise direction, depending on the feeding rotation direction of the vibration plate. The air outlet direction of the static electricity elimination device 7 must be consistent with the feeding rotation direction of the vibration plate.

[0053] The base circle D in the static electricity elimination device 7 is a preset base circle, and the diameter of the base circle D is greater than or equal to 80% of the outer circle size of the annular groove 14 and less than or equal to 50% of the outer circle size of the annular groove 14 .

[0054] Preferably, a step 2 is provided on the outer ring of one side of the lower bottom surface 13 of the bottom plate 1, and the step 2 is used to cooperate with the material tray 20 to achieve a dustproof effect.

[0055] Preferably, a cavity portion 3 is provided on one side of the lower bottom surface 13 of the base plate 1 opposite to the protrusion 11. The purpose of providing the cavity portion 3 is, on the one hand, to reduce the contact area with the bottom surface of the circular vibration plate for installation, and on the other hand, to reduce the weight of the static elimination device 7.

[0056] Preferably, the device is an integrated structure, that is, the base plate 1 and the gyroscopic structure are integrally formed. The embodiment of the static elimination device 7 is shown in this way. Of course, the base plate 1 and the gyroscopic structure can also be designed as separate structures, and the two are connected together by fasteners.

[0057] Preferably, the device is made of plastic steel or aluminum alloy material.

[0058] A circular groove is arranged on the inner bottom surface 5105 of the reflux disc body 5, the side wall of the circular groove is positioned and matched with the step circumferential surface 4 of the static elimination device 7, the step end surface 2 is flatly fitted with the inner bottom surface 5105 of the reflux disc body 5, and then connected with the reflux disc body 5 by screws through the screw through hole 101 on the gyro of the static elimination device 7. That is, the circumferential surface 6 of the static elimination device 7 and the gyro are in a state of protruding from the inner bottom surface 5105 of the reflux disc body 5. In order to ensure the air pressure tightness between the reflux disc body 5 and the static elimination device 7, a sealing device is generally an O-ring at the bottom of the circular groove on the inner bottom surface of the reflux disc body 5, corresponding to the position of the adjacent bottom surface 30 of the step circumferential surface 4 of the static elimination device 7. Of course, the sealing structure can also adopt other structures, as long as the annular groove 14 can be guaranteed to be airtight.

[0059] An annular groove 14 is provided on the lower bottom surface 13 of the static elimination device 7, and the annular groove 14 is connected to the ion wind generated by the external high-voltage ion wind nozzle. A plurality of air outlets 15 are evenly distributed on the circumferential surface 20 of the static elimination device 7, and the air outlets 15 pass through the annular groove 14. The devices in the reflux disc body 5 will eventually pass through the circumferential surface 20. The gyroscopic body of the static elimination device 7 can make it easy for the devices on the gyroscopic body to slide down to the circumferential surface 20 of the static elimination device 7 when vibrating, and the ion wind blown out from the air outlets 15 evenly distributed on the circumferential surface 20 blows to the moving devices at zero distance. Because the devices in the disc are in a spiral motion mode and the ion wind is in a long blowing state, the devices that have not entered the feeding track will circulate on the circumferential surface 20 and be covered by the ion wind blown out by the air outlets 15, so the static electricity between the devices can be effectively removed.

[0060] exist Fig.13In the embodiment, the air outlet holes 15 are distributed along the circumference tangentially, and the axes 151 of the air outlet holes 15 are all tangent to the predetermined base circle D. The smaller the value of the base circle D, the more the axis 151 of the air outlet hole 15 is perpendicular to the circumferential surface 20, and the larger the value of the base circle D, the more the axis 151 of the air outlet hole 15 is tangent to the circumferential surface 20. Since the air outlet holes 15 are connected with the annular groove 14, the size of the base circle D cannot be greater than or equal to the outer circle size F of the annular groove 14, otherwise the air outlet holes 15 cannot pass through the annular groove 14. In the anti-static device 7, the value of the base circle D is set to: F*80%<D<F / 2.

[0061] In the static elimination device 7, the air outlets 15 are distributed tangentially along the circumference in a clockwise direction, which depends on the rotation direction of the reflux disc body 5. When the rotation direction of the reflux disc body 5 is counterclockwise, the air outlets 15 are distributed tangentially along the circumference in a counterclockwise direction. The structure of the air outlets 15 can also be designed to be arranged on the lower bottom surface 13 of the static elimination device 7. The lower bottom surface 13 of the static elimination device 7 is closed with the inner bottom surface of the reflux disc body 5 to form uniformly distributed air outlets. The appearance size of the static elimination device 7 is not limited.

[0062] The present invention further provides a reciprocating flow type multi-directional discharge vibration tray 100, comprising a vibration source 10 and a tray 20 located on the vibration source 10, wherein the tray 20 is the reciprocating flow type multi-directional discharge vibration tray mentioned above.

[0063] Without departing from the concept of the invention, all equivalent changes made by applying the contents of the invention description and drawings are considered to be included in the scope of the claims of the invention.

Claims

1. A feeding device, comprising a reciprocating multi-directional discharge vibration plate (100) and a reciprocating linear feeder (4), wherein the reciprocating multi-directional discharge vibration plate (100) comprises a vibration source (10) and a material plate (20) located on the vibration source (10), wherein the material plate (20) is provided with first to Nth spiral tracks that are independent of each other and spirally ascend along the inner wall of the material plate (20), wherein: N is an integer greater than or equal to 2, and the outlet section (3) of each spiral track is tangent to the upper circle of the material tray (20) and is used to dock with the inlet (411) of the reciprocating linear feeding track of the corresponding reciprocating linear feeder (4); it is characterized in that: a section of the spiral track that intersects with the return port (412) of the reciprocating linear feeding track and is higher than the return port (412) is cut off, and a bridge rail (5) is set at the cutoff point, and a transition spiral track (51) is provided on the upper surface of the bridge rail (5), and the transition spiral track (51) connects the cut spiral track, and a return portion (52) connected to the return port (412) is provided below the bridge rail (5), and the gap between the upper surface of the return portion (52) and the lower surface of the bridge rail (5) is set to be greater than the thickness of a device; in the reciprocating linear feeder (4 ) is provided with a return track splash plate (92) on the outside of the return track (91); the first end face (911) and the second end face (912) of the return track (91) and the end face (922) of the return track splash plate (92) extend beyond the boss face (6121) of the return portion (52), so that the device on the return track (91) can slide directly from the first end face (911) into the return portion (52); a predetermined gap is provided between the second notch face (6112) of the notch (611) at the return portion of the return-flow type multi-directional discharge vibration plate (100) and the bottom face of the return track (91); a predetermined gap is provided between the third notch face (6113) and the face (921) of the return track splash plate (92); and a predetermined gap is provided between the first notch face (6111) and the second end face (912) of the return track (91); and all the gaps are smaller than the minimum size of the device appearance.

2. The feeding device according to claim 1, characterized in that: A plurality of device-guiding reflux grooves (521) are provided on the upper surface of the reflux portion (52).

3. The feeding device according to claim 2, characterized in that: The direction of the device guiding the reflow groove (521) is arranged to be in the same direction as the disc feeding direction (F) as much as possible.

4. The feeding device according to claim 1, 2 or 3, characterized in that: The width of the transition spiral track (51) is 1-1.2 times the thickness of a device.

5. The feeding device according to claim 4, characterized in that: A through groove (53) passing through the return portion (52) is provided on the bridge rail (5), and an edge (531) is formed between the through groove (53) and the transition spiral track (51), and the height of the edge (531) is less than the thickness of the device.

6. The feeding device according to claim 1, 2 or 3, characterized in that: A through groove (53) passing through the return portion (52) is provided on the bridge rail (5), and an edge (531) is provided between the through groove (53) and the transition spiral track (51), wherein the height of the edge (531) is less than the thickness of the device.

7. The feeding device according to claim 1, 2 or 3, characterized in that: A static electricity removal device (7) is provided on the bottom of the material tray (20).

8. The feeding device according to claim 7, characterized in that: The static electricity removal device (7) comprises a base plate (1), on the upper bottom surface of the base plate (1) is provided with an upward protrusion (11), the circumference of the protrusion (11) is transitionally connected with the circumference of the base plate (1) through an arc surface (12) to form a gyroscope with a high middle and a low edge; on the lower bottom surface (13) of the base plate (1) is provided an annular groove (14) that can be connected to an external ion wind source, and on the circumferential side surface of the base plate (1) are provided a plurality of air outlet holes (15) obliquely arranged in the same direction, and the inner ends of the air outlet holes (15) are connected to the annular groove (14).

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