CN110683330A

CN110683330A - Circulating tray feeder

Info

Publication number: CN110683330A
Application number: CN201910851428.XA
Authority: CN
Inventors: 赵国栋; 陈坚周; 谭伟灿
Original assignee: Zhuhai Pingchuan Zhida Technology Co Ltd
Current assignee: Zhuhai Pingchuan Zhida Technology Co Ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-01-14

Abstract

The invention relates to the technical field of feeding, and discloses a circulating tray feeder which can achieve the effect of circulating feeding. The invention comprises the following steps: the material transfer device comprises a workbench, a plurality of material trays, a first transfer assembly, a second transfer assembly, a third transfer assembly and a fourth transfer assembly, wherein the workbench is provided with a first guide area and a second guide area in parallel along the vertical direction, the material trays are stacked in the first guide area and the second guide area respectively, the first transfer assembly is arranged at the upper end of the workbench, the second transfer assembly is arranged at the bottom of the workbench, the third transfer assembly is arranged on the first guide area, and the fourth transfer assembly is arranged on the second guide area. The invention takes the vacancy at the upper end of the second guide area as the unloading station and the vacancy at the upper end of the second guide area as the loading station respectively, and can lead the material tray to circularly move between the first guide area and the second guide area by matching the actions of the first transfer assembly, the second transfer assembly, the third transfer assembly and the fourth transfer assembly, thereby realizing the modes of circular feeding and automatic fixed-point feeding, and the work of the unloading station can not be influenced during material supplement, effectively reducing the labor intensity of working personnel and improving the production efficiency.

Description

Circulating tray feeder

Technical Field

The invention relates to the technical field of feeding, in particular to a circulating tray feeder.

Background

The current industrial manufacturing is gradually developed towards the direction of automatic manufacturing, but for the assembly of products, the materials are required to be manually transferred under many conditions, so the efficiency is low; and in the automatic processing process, the manipulator is main processingequipment, but the manipulator needs the fixed feed mode to cooperate and just can accomplish the higher work of required precision, if utilize the workman to carry out the feed then can lead to cost-push, inefficiency, and traditional automatic feed equipment is bulky, needs pause equipment work when the feed supplement.

Disclosure of Invention

The present invention is directed to solve at least one of the problems of the prior art, and to provide a circulating tray feeder capable of achieving the effect of circulating feeding.

According to a first aspect of the present invention, there is provided a circulating tray feeder comprising:

the workbench is provided with a first guide area and a second guide area in parallel along the vertical direction;

the material trays are respectively stacked in the first guide area and the second guide area;

the first transfer assembly is arranged at the upper end of the workbench and used for transferring the material tray from the first guide area to the second guide area;

the second transfer assembly is arranged at the bottom of the workbench and used for transferring the material tray from the second guide area to the first guide area;

the third transfer assembly is arranged on the first guide area and used for sequentially transferring the material trays on the first guide area to the upper end of the first guide area;

and the fourth transfer assembly is arranged on the second guide area and used for sequentially transferring the material trays on the second guide area to the bottom of the second guide area.

Material trays and materials (or expressed as products), not structures of the present invention; trays and materials, etc. are included in the claims to illustrate structure and/or function.

Further, first transfer subassembly includes first slip platform and is used for the drive the first transfer power spare that first slip platform slided, be provided with first splint on the first slip platform and be used for the drive first splint centre gripping the first centre gripping power spare of material tray.

Further, first transfer subassembly still include along the first slide rail that the horizontal direction set up and with first slide rail sliding connection's first slider, first sliding stand is fixed in the upper end of first slider.

Further, a first aligning notch used for aligning and buckling the material tray is formed in the first clamping plate.

Further, the second transfer assembly comprises a second sliding table and a second transfer power member for driving the second sliding table to slide.

Furthermore, be provided with the guide post in first guide area with the second guide area respectively, the both sides of material dish are equipped with the draw-in groove with guide post assorted, the material dish is at the transfer in-process, along the guide post slides.

Further, the third shifts the subassembly and includes the third slip platform and is used for the drive the third that the third slip platform slided shifts power spare, be provided with the third splint on the third slip platform and be used for the drive the centre gripping of third splint the third centre gripping power spare of material tray.

Furthermore, the third transfer assembly further comprises a third slide rail arranged in the vertical direction and a third slide block connected with the third slide rail in a sliding manner, and the third slide table is fixed at the front end of the third slide block.

Further, a third aligning notch used for aligning and buckling the material tray is formed in the third clamping plate.

Further, the fourth transfer assembly is identical in structure with the third transfer assembly.

Has the advantages that: the vacancy at the upper end of the second guide area is used as an unloading station, the vacancy at the upper end of the second guide area is used as a loading station, and the material tray can circularly move between the first guide area and the second guide area by matching with the actions of the first transfer assembly, the second transfer assembly, the third transfer assembly and the fourth transfer assembly, so that the circular feeding mode and the automatic fixed-point feeding mode are realized, the work of the unloading station cannot be influenced during material supplement, the labor intensity of workers is effectively reduced, and the production efficiency is improved;

in addition, the invention has simple structure and small volume.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of a preferred embodiment of the present invention showing the structure of an empty tray;

FIG. 2 is a state diagram of the first operating state of a preferred embodiment of the present invention;

FIG. 3 is a state diagram of the second operating state of a preferred embodiment of the present invention;

FIG. 4 is a state diagram of the third operating state of a preferred embodiment of the present invention;

FIG. 5 is a state diagram of the fourth operating state of a preferred embodiment of the present invention;

FIG. 6 is a schematic diagram of the structure of a material tray according to a preferred embodiment of the present invention;

FIG. 7 is a top view of FIG. 6;

FIG. 8 is a schematic view of another angle configuration of a preferred embodiment of the present invention;

FIG. 9 is a schematic structural view of a second transfer unit of a preferred embodiment of the present invention;

fig. 10 is a schematic structural view of a third transfer unit according to a preferred embodiment of the present invention.

Reference numerals: the first guide area 110, the second guide area 120, the guide post 130, the first transfer assembly 200, the first sliding table 210, the first transfer force member 220, the first clamping plate 230, the first clamping power member 240, the first slide rail 250, the first slider 260, the first connecting plate 270, the first alignment notch 231, the second transfer assembly 300, the second sliding table 310, the second transfer power member 320, the second slide rail 330, the second slider 340, the third transfer assembly 400, the third sliding table 410, the third transfer power member 420, the third clamping plate 430, the third clamping power member 440, the third slide rail 450, the third slider 460, the third alignment notch 431, the fourth transfer assembly 500, the material tray 600, the card slot 610, and the alignment bar 620.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If there is a description of the first, second, third and fourth only for the purpose of distinguishing between technical features, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 and 2, a preferred embodiment, a circulating tray feeder, comprises:

a work table 100 in which a first guide area 110 and a second guide area 120 are arranged in parallel in a vertical direction, wherein bottoms of the first guide area 110 and the second guide area 120 are communicated;

a plurality of material trays 600 are arranged according to the heights of the first guide area 110 and the second guide area 120, that is, the first guide area 110 and the second guide area 120 can respectively contain six material trays 600, and the material trays 600 are respectively arranged in the first guide area 110 and the second guide area 120 in a stacking manner;

a first transfer assembly 200 disposed at an upper end of the table 100, for transferring the material tray 600 from the first guide area 110 to the second guide area 120;

the second transfer assembly 300 is disposed at the bottom of the work table 100, and is configured to transfer the material tray 600 from the second guide area 120 to the first guide area 110;

the third transfer assembly 400 is arranged on the first guide area 110 and used for sequentially transferring the material trays 600 on the first guide area 110 to the upper end of the first guide area 110;

the fourth transfer assembly 500 is disposed on the second guide area 120, and is configured to sequentially transfer the material trays 600 on the second guide area 120 to the bottom of the second guide area 120. Material tray 600 and material (or stated as product), not structure of the invention; tray 600, materials, etc. are included in the claims to illustrate structure and/or function.

Referring to fig. 2, the third transfer assembly 400 clamps the material tray 600 at the bottom of the first guide area 110, and pushes up six material trays 600 in the first guide area 110 by the height of one material tray 600, at this time, the material tray 600 at the topmost end of the first guide area 110 can be unloaded, and the unloading can be completed by matching with an automatic manipulator; after the unloading is finished, the first transfer assembly 200 transfers the material tray 600 at the top end of the first guide area 110 to the top end of the second guide area 120, so that the transferred material tray 600 is stacked at the upper end of the material tray 600 at the top of the second guide area 120, and after the transfer is finished, the first transfer assembly 200 automatically returns to the upper end of the first guide area 110; referring to fig. 3, after the transfer, seven material trays 600 are arranged on the second guide area 120, the fourth transfer assembly 500 clamps the penultimate material tray 600 on the second guide area 120 and simultaneously holds the penultimate material tray 600, and since the material trays 600 are stacked layer by layer, the fourth transfer assembly 500 is equivalent to simultaneously hold six material trays 600, and at this time, the material tray 600 at the topmost end of the second guide area 120 can be loaded; referring to fig. 4, while feeding, the second transfer assembly 300 transfers the material tray 600 at the bottom of the second guide area 120 to the lower end of the first guide area 110, at this time, the third transfer assembly 400 releases the held material tray 600, because the material trays 600 of the first guide area 110 are stacked layer by layer, the five material trays 600 originally on the first guide area 110 are simultaneously stacked on the upper end of the material tray 600 which has just been transferred to the bottom of the first guide area 110, then the third transfer assembly 400 moves downward and holds the material tray 600 which has just been transferred to the bottom of the first guide area 110, and after holding is completed, the second transfer assembly 300 returns to the bottom end of the second guide area 120; referring to fig. 5, after the second transfer assembly 300 returns to the bottom of the second guide area 120, the fourth transfer assembly 500 moves the held material tray 600 downward, and the material tray 600 on the second guide area 120 moves downward integrally with the fourth transfer assembly 500, so that the material tray 600 at the bottom of the second guide area 120 is placed on the second transfer assembly 300; then, the fourth transfer assembly 500 releases the held material tray 600 and raises it until it returns to the position of the last material tray 600 in the second guide area 120; after returning, the fourth transfer assembly 500 will clamp the material tray 600 at the position; while the fourth transfer assembly 500 transfers, the third transfer assembly 400 raises the tray 600 on the first guide area 110 up to a height of the tray 600, that is, the state shown in fig. 5 and the state shown in fig. 2, except that the tray 600 at the top of the first guide area 110 in fig. 5 is the second tray 600 counted from top to bottom of the first guide area 110 in fig. 2, and at this time, the tray 600 at the top of the first guide area 110 in fig. 5 may be unloaded.

Therefore, by repeating the above-described operation, twelve trays 600 can be circularly transferred in the clockwise or counterclockwise direction on the first guide area 110 and the second guide area 120, respectively. Meanwhile, the position of the top end of the first guide area 110 can be used as an unloading station, the position of the top end of the second guide area 120 can be used as a loading station, the unloading and loading processes can be respectively completed, the simultaneous loading and unloading processes can be realized by adjusting the action time of the first transfer assembly 200, the second transfer assembly 300, the third transfer assembly 400 and the fifth transfer assembly 500, the material supplementing process is not required to be completed by stopping equipment, and the continuous supply of materials is realized. In addition, the automatic fixed-point material supply can be realized by matching the action of a mechanical arm on a production line, so that the labor intensity of workers can be effectively reduced, and the production efficiency can be improved.

Referring to fig. 1 to 5, the guide posts 130 are respectively disposed in the first guide area 110 and the second guide area 120, referring to fig. 6 and 7, the material tray 600 is provided with a clamping groove 610 matched with the guide posts 130 at both sides thereof, and the material tray 600 can slide along the guide posts 130 during the transfer process by using the clamping groove 610 and the guide posts 130, so that the material trays 600 respectively stacked in the first guide area 110 and the second guide area 120 maintain the stability of the whole body during the ascending or descending process, and the material trays 600 are prevented from sliding and falling off each other. Specifically, in this embodiment, eight guide posts 130 are provided, every four guide posts 130 are taken as a unit, and are distributed in the first guide area 110 and the second guide area 120 in a rectangular manner, two clamping grooves are respectively provided on two sides of the corresponding material tray 600, when the material tray 600 at the bottommost of the first guide area 110 is clamped and lifted by the third transfer assembly 400, the clamping grooves 610 of the material tray 600 are clamped with the corresponding guide posts 130 one by one, and then when the third transfer assembly 400 repeatedly lifts one material tray 600, the material tray 600 stacked in the first guide area 110 gradually slides along the guide posts 130 until being separated from the guide posts 130 and located at the upper end of the first guide area 110; the guide column 130 of the second guide area 120 has the same principle as the guide column 130 of the first guide area 110, except that the material tray 600 of the second guide area 120 is engaged with the guide column 130 from the upper end, and gradually moves downward in cooperation with the action of the fourth transfer unit 500 until being separated from the guide column 130 and located at the bottom of the second guide area 120.

Referring to fig. 1 to 5 and 8, the first transfer assembly 200 includes a first sliding table 210 and a first transfer force member 220 for driving the first sliding table 210 to slide, wherein the first transfer force member 220 is fixed on the working table 100, a driving end of the first transfer force member 220 is fixedly connected to the first sliding table 210 through a first connection plate 270, a first clamping plate 230 and a first clamping force member 240 for driving the first clamping plate 230 to clamp the material tray 600 are disposed on the first sliding table 210, the first clamping force member 240 is disposed at two ends and fixed to an upper end of the first sliding table 210, each first clamping force member 240 drives one first clamping plate 230, driving directions of the two first clamping force members 240 are opposite, when the two first clamping plates 230 move inward toward each other at the same time, both ends of the material tray 600 are clamped, when the two first clamping plates 230 move outward away from each other at the same time, material tray 600 may be released.

The first rotating power member 220 and the first clamping power member 240 may be an air cylinder, or a hydraulic cylinder, or a screw-nut pair and a motor structure, or a belt and a motor mechanism, in this embodiment, the air cylinder or the hydraulic cylinder is used for the first clamping power member 240 and the first clamping power member 240, and an appropriate type of the air cylinder or the hydraulic cylinder may be selected according to a driving type. When the first transfer force member 220 is selected, an air cylinder or a hydraulic cylinder with a proper stroke is selected according to the position distance between the upper end of the first guide area 110 and the upper end of the second guide area 120, so that the material tray 600 can be accurately butted with the material tray 600 on the second guide area 120 in the transfer process.

The first transfer assembly 200 further comprises a first slide rail 250 arranged along the horizontal direction and a first slide block 260 slidably connected with the first slide rail 250, the first slide table 210 is fixed at the upper end of the first slide block 260, the first slide rail 250 is arranged on the workbench 100 along the horizontal direction, and the bottom end of the first slide table 210 is fixedly connected with the upper end of the first slide block 260. In this embodiment, the first sliding blocks 260 are two, the two first sliding blocks 260 are respectively connected with the same first sliding rail 250 in a sliding manner and distributed on two sides of a portion of the first sliding table, and when the first rotating force member 220 works, the first sliding table is driven to slide along the horizontal direction through the first connecting plate 270, so that the material tray 600 clamped by the first clamping plate 230 can be driven to move towards the top end of the second guiding area 120. By arranging the first slide rail 250 and the first slider 260, the stability of the material tray 600 in the transfer process can be improved.

The first clamping plate 230 is provided with a first alignment notch 231 for aligning and fastening the material tray 600. The first aligning gap 231 is used for aligning and fastening the material tray 600, and an aligning strip 620 or a reinforcing rib plate matched with the first aligning gap 231 is arranged on the periphery of the material tray 600. The first aligning notch 231 is arranged, so that the stability and reliability of the material tray 600 can be improved, and the material tray 600 is prevented from sliding off the first clamping plate 230 in the transferring process.

Referring to fig. 8 and 9, the second transfer assembly 300 includes a second slide table 310 and a second transfer power member 320 for driving the second slide table 310 to slide. Similarly, the second power transfer member 320 may be a pneumatic cylinder, a hydraulic cylinder, a screw-nut pair and motor structure, or a belt and motor mechanism. In this embodiment, the second transferring power member 320 is an air cylinder or a hydraulic cylinder, and a suitable type of the air cylinder or the hydraulic cylinder is selected according to a driving type, the second transferring power member 320 is disposed at the bottom of the worktable 100, the second sliding table 310 is fixedly connected to a driving end of the second transferring power member 320, the second sliding table 310 is used for supporting the material tray 600, when the second transfer power member 320 works, the second sliding table 310 is driven to slide, so as to drive the material tray 600 placed on the second sliding table 310 to transfer, when the type of the second transfer power member 320 is selected, the type is selected by combining the position distance between the bottom of the first guide area 110 and the bottom of the second guide area 120, and an air cylinder or a hydraulic cylinder with a proper stroke is selected, so that the second transfer assembly 300 can transfer the material tray 600, the transferred material tray 600 can be accurately butted against the material tray 600 on the first guide area 110.

The second transfer assembly 300 further includes a second slide rail 330 disposed along the horizontal direction and a second slide block 340 slidably connected to the second slide rail 330, and the second slide table 310 is fixed to an upper end of the second slide block 340. In this embodiment, the second slide rails 330 are two and distributed on two sides of the second transfer power component 320, and each second slide rail 330 is connected with a second slide block 340 in a sliding manner, and the top end of the second slide block 340 is fixedly connected with the bottom end of the second slide table, so that when the second transfer power component 320 drives the second slide table, the second slide table slides along the second slide rails 330, and the material tray 600 on the second slide table can be kept stable in the transfer process.

Referring to fig. 1, 8 and 10, the third transfer assembly 400 includes a third sliding table 410 and a third transfer power member 420 for driving the third sliding table 410 to slide, where the third transfer power member 420 may be an air cylinder, a hydraulic cylinder, a screw-nut pair and a motor structure, or a belt and a motor mechanism, in this embodiment, since the third transfer power member 420 needs to lift six full-load material trays 600 at least at the same time, the driving force of the third transfer power member 420 needs to be larger, the third transfer power member 420 of this embodiment is an air cylinder or a hydraulic cylinder, and an appropriate type of the air cylinder or the hydraulic cylinder is selected according to the driving requirement, and the third sliding table 410 is disposed behind the first guide area 110. The third transfer power member 420 drives the third sliding table 410 to move up and down in the vertical direction.

The third slide table 410 is provided with a third clamping plate 430 and a third clamping power member 440 for driving the third clamping plate 430 to clamp the material tray 600. The third clamping power members 440 are provided with two and fixed at the front end of the third sliding table 410, each third clamping power member 440 drives one third clamping plate 430, the driving directions of the two third clamping power members 440 are opposite, when the two third clamping plates 430 move inward and close to each other at the same time, both ends of the material tray 600 can be clamped, and when the two third clamping plates 430 move outward and away from each other at the same time, the material tray 600 can be released. The third clamping power member 440 may be an air cylinder, or a hydraulic cylinder, or a screw nut pair and motor structure, or a belt and motor mechanism, in this embodiment, the third clamping plate 430 needs to simultaneously support six full-load material trays 600 when clamping one material tray 600, so that the driving force of the third clamping power member 440 needs to be larger, and in this embodiment, the third clamping power member 440 is an air cylinder or a hydraulic cylinder, and a suitable type of the air cylinder or the hydraulic cylinder is selected according to the driving type.

After the third transfer assembly 400 clamps the material tray 600 at the bottom of the first guide area 110, six material trays 600 sequentially stacked on the first guide area 110 need to be lifted at the same time, so that the driving force of the third clamping power member 440 and the third transfer power member 420 needs to be larger, and in order to maintain the stability of the six material trays 600 when the six material trays are lifted upwards, the third transfer assembly 400 further includes a third slide rail 450 arranged in the vertical direction and a third slide block 460 slidably connected to the third slide rail 450, and the third slide block 410 is fixed to the front end of the third slide block 460. In this embodiment, two third slide rails 450 are disposed and distributed on two sides of the third power transfer component 420, each third slide rail 450 is slidably connected to one third slide block 460, and the front end of the third slide block 460 is slidably connected to the back of the third sliding table. When the third power transfer unit 420 drives the third slide rail, the third slide rail moves up and down along the third slide rail 450.

A third aligning gap 431 for aligning and fastening the material tray 600 is arranged on the third clamping plate 430. The periphery of the material tray 600 is provided with an alignment strip 620 or a reinforcing rib plate matched with the first alignment notch 231. The first aligning notch 231 is arranged, so that the stability and reliability of the material holding tray 600 can be improved, and the material holding tray 600 is prevented from sliding off the third clamping plate 430 in the ascending and transferring process.

In this embodiment, the fourth transfer unit 500 has the same structure as the third transfer unit 400. That is, the fourth transferring assembly 500 is respectively provided with a fourth transferring power member (not shown), a fourth sliding table (not shown), a fourth clamping plate (not shown), a fourth clamping power member (not shown), a fourth sliding rail (not shown) and a fourth sliding rail (not shown), and the fourth transferring assembly 500 is different from the third transferring assembly 400 in that the fourth transferring assembly 500 is arranged on the second guiding area 120, and the fourth transferring assembly 500 is used for clamping a penultimate material tray 600 positioned on the second guiding area 120 and simultaneously descending the material trays 600 above the penultimate material tray 600 downwards until the material tray 600 on the second guiding area 120 is positioned on the second transferring assembly 300.

Products, materials, etc., are not structures of the present invention; the introduction of products, materials, etc. into the claims is intended to be illustrative of structure and/or function.

The motor, the cylinder, the hydraulic cylinder, the belt, the screw nut pair and other objects may not be available in actual sale, namely, not sold together, and need to be purchased and assembled by a buyer; such components are those known to those skilled in the art to be required to perform the corresponding function.

The above is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments, and the present invention shall fall within the protection scope of the present invention as long as the technical effects of the present invention are achieved by any of the same or similar means.

Claims

1. A circulating tray feeder, comprising:

2. The circulating tray feeder of claim 1, wherein: first transfer subassembly includes first slip platform and is used for the drive the first commentaries on classics that first slip platform slided moves power spare, be provided with first splint on the first slip platform and be used for the drive first splint centre gripping the first centre gripping power spare of material dish.

3. The circulating tray feeder of claim 2, wherein: the first transfer assembly further comprises a first sliding rail arranged in the horizontal direction and a first sliding block connected with the first sliding rail in a sliding mode, and the first sliding table is fixed at the upper end of the first sliding block.

4. The circulating tray feeder of claim 2 or 3, wherein: and a first aligning notch for aligning and buckling the material tray is arranged on the first clamping plate.

5. The circulating tray feeder of claim 1, wherein: the second transfer assembly comprises a second sliding table and a second transfer power part for driving the second sliding table to slide.

6. The circulating tray feeder of claim 1, wherein: the material tray is characterized in that guide posts are respectively arranged in the first guide area and the second guide area, clamping grooves matched with the guide posts are formed in two sides of the material tray, and the material tray slides along the guide posts in the transfer process.

7. The circulating tray feeder of claim 1, wherein: the third shifts the subassembly and includes the third sliding stand and is used for the drive the third that the third sliding stand slided shifts power spare, be provided with the third splint on the third sliding stand and be used for the drive the third splint centre gripping of material dish third centre gripping power spare.

8. The circulating tray feeder of claim 6, wherein: the third transfer assembly further comprises a third slide rail arranged in the vertical direction and a third slide block connected with the third slide rail in a sliding mode, and the third slide table is fixed to the front end of the third slide block.

9. The circulating tray feeder of claim 7 or 8, wherein: and a third aligning notch for aligning and fastening the material tray is arranged on the third clamping plate.

10. The circulating tray feeder of claim 9, wherein: the fourth transfer assembly is identical in structure with the third transfer assembly.