Tray rack

Abstract

A material tray rack comprises a rack base and a plurality of material tray storage racks, the rack base is provided with one of a sliding block and a sliding rail, the bottom of each material tray storage rack is provided with the other one of the sliding block and the sliding rail, and the sliding blocks are arranged on the sliding rails in a sliding mode so that the material tray storage racks can be independently arranged on the rack base in a sliding mode. Wherein a front baffle and a rear baffle are arranged on the two sides, perpendicular to the extending direction of the sliding rail, of the material disc storage frame correspondingly, the front baffle and the rear baffle are used for limiting the two end faces of the material disc in the axial direction correspondingly, and the rear baffle is higher than the front baffle. According to the material tray storage device, through sliding fit between the sliding blocks and the sliding rails, independent sliding-out of all the material tray storage racks is achieved, and a mechanical arm can conveniently take and place materials; meanwhile, the rear baffle and the front baffle adopt the design of long and short edges, the trays are discharged through the long edges (the rear baffle) during discharging, outward expansion deformation of the trays is effectively absorbed, more trays can be stored in a limited space, vertical conveying of the material belt is guaranteed, and the material belt is prevented from being scratched and pulled.

Description

Technical Field

[0001] The present application relates to the technical field of material tray storage, and in particular to a material tray rack. Background Art

[0002] The placement machine, also known as the placement machine, is an extremely core equipment in the SMT (Surface Mount Technology) industry production line. It is mainly used to place electronic components on circuit boards. Generally, the placement machine occupies more than 60% of the total investment of the SMT production line, and the production capacity of the production line is also mainly determined by the placement machine.

[0003] In order to ensure continuous feeding to the SMT machine, a tray rack is usually set on the SMT machine, and the tray wrapped with the carrier tape is placed on the tray rack to facilitate continuous feeding to the SMT machine. Most of the existing tray racks adopt a simple sheet metal rack design, and the space between the upper tray and the tray is small, making it difficult to realize the automatic material removal and placement of the robot arm. Manual replacement of the tray is inefficient, which is easy to affect the production efficiency of the production line, and the labor cost increases year by year, and the cost is high. In addition, manual operation is prone to errors, especially when the tray rack and the identification code are set separately. Manual scanning of the code and placing the material are prone to insufficient confirmation, mixed materials or wrong storage positions, which affects the production of the production line. The existing tray rack is also less versatile. Due to insufficient limit, the 7-inch tray needs to be placed at the front end of the tray rack and stuck. The 13-inch tray needs to be inserted into the mandrel before being placed on the rack. The operation is cumbersome and the mandrel is easy to lose.

[0004] Therefore, how to improve the technical defects existing in the prior art has always been a problem that ordinary technicians in this field need to solve urgently. Summary of the invention

[0005] The purpose of this application is to provide a material tray and material rack that can realize automatic material receiving and material replacement of a placement machine without stopping the SMT line, thereby greatly improving production efficiency.

[0006] The technical solution provided by the present invention is as follows:

[0007] A material tray and material rack, comprising:

[0008] A material rack base, wherein the material rack base is provided with one of a slide block and a slide rail;

[0009] A plurality of material tray storage racks, wherein the bottom of the material tray storage rack is provided with a slider or a slide rail, wherein the slider is slidably mounted on the slide rail, so that the plurality of material tray storage racks can be independently slidably mounted on the material rack base; and each of the material tray storage racks can store at most one material tray;

[0010] Among them, the material tray storage rack has a front baffle and a rear baffle on both sides perpendicular to the extension direction of the slide rail, and the front baffle and the rear baffle are respectively used to limit the two end surfaces of the material tray in the axial direction, and the height of the rear baffle is higher than the height of the front baffle.

[0011] In some embodiments, four supporting wheels are provided between the front baffle and the rear baffle, and the four supporting wheels are arranged in sequence along a preset circular arc curve, the circular arc curve has a first diameter, and the four supporting wheels are suitable for supporting circular material trays with a diameter of the first diameter; wherein the perpendicular bisectors of the two supporting wheels located on both sides are coaxial with the perpendicular bisectors of the two supporting wheels located in the middle, and the two supporting wheels located in the middle are suitable for supporting circular material trays with a diameter of the second diameter; wherein the size of the first diameter is greater than the size of the second diameter.

[0012] In some embodiments, the two middle supporting wheels are located at the circumference intersection of the circular arc curve with the first diameter and the circular arc curve with the second diameter.

[0013] In some embodiments, the front baffle and the rear baffle are both provided with avoidance holes, suitable for the robot arm to grab or place the tray;

[0014] Wherein, a projection of the avoidance hole of the front baffle on the rear baffle coincides with the avoidance hole on the rear baffle.

[0015] In some embodiments, the material rack base has a side outlet at one end in the extension direction of the slide rail, and the material tray storage rack is suitable for sliding out of or into the material rack base from the side outlet.

[0016] In some embodiments, the tray storage rack is provided with a hook on one side of the slide rail in the extension direction thereof, for driving the tray storage rack to slide along the extension direction of the slide rail.

[0017] In some embodiments, the top end surface of the front baffle is an inclined surface, and is tilted toward one side of the hook along the extension direction of the slide rail.

[0018] In some embodiments, an identification code is provided around the hook to identify information of the tray storage rack.

[0019] In some embodiments, the material rack base is provided with one of a positioning column and a positioning hole, and the bottom of the material tray storage rack is provided with the other of a positioning column and a positioning hole, and the positioning column is clamped in the positioning hole to limit the sliding of the material tray storage rack relative to the material rack base.

[0020] In some embodiments, the positioning column is provided on the material tray storage rack, and the number of the positioning column on each material tray storage rack is one; the positioning hole is provided on the material rack base, including a first positioning hole and a second positioning hole; when the positioning column is clamped in the first positioning hole, the material tray storage rack is restricted to a state of sliding out from the material rack base; when the positioning column is clamped in the second positioning hole, the material tray storage rack is restricted to a state of sliding into the material rack base;

[0021] and / or

[0022] One end of the positioning post that is suitable for passing through the positioning hole is in a conical or spherical structure.

[0023] The technical effects of this application are:

[0024] 1. In this application, the tray storage rack is installed on the rack base through the sliding cooperation between the slide rail and the slider. When the placement machine needs to change materials, the corresponding tray storage rack can be opened to replace or place the tray inside. In this way, the robot arm will not be limited by the space between two adjacent trays, and can realize automatic material loading and unloading, improve production capacity, avoid the phenomenon of mixed materials or wrong storage position that may occur due to manual material change, and reduce the error rate.

[0025] 2. In the present application, the material tray storage rack has a rear baffle and a front baffle, and adopts a long and short side design. When discharging materials, the robotic arm can grab the material tray and discharge the materials by the long side (rear baffle), thereby effectively absorbing the outward deformation of the material tray, which is conducive to storing more material trays in a limited space, and ensuring the vertical transportation of the material belt to prevent the material belt from being scratched and pulled.

[0026] 3. In the present application, four supporting wheels are provided on the tray storage rack, which can support trays of two diameters, thereby improving the versatility of the tray rack. At the same time, compared with the existing limiting method of trays of different sizes, the use of supporting wheels to support trays of different sizes is simpler to operate and has better stability, and is not easy to affect the transportation of the material belt.

[0027] 4. In the present application, the tray storage rack is provided with an identification code on the side around the hook for identifying the information of the tray storage rack, so that the information can be reconfirmed when the tray is automatically taken and replaced, effectively preventing material connection errors.

[0028] 5. In the present application, a positioning column is provided at the bottom of the material tray storage rack, and a first positioning hole and a second positioning hole are provided on the material rack base. When the material tray storage rack slides, the positioning column can be selectively clamped in the first positioning hole or the second positioning hole. When clamped in the first positioning hole, the material tray storage rack is restricted to a state of sliding out from the material rack base, which is convenient for the robot arm to take and replace without running; when clamped in the second positioning hole, the material tray storage rack is restricted to a state of sliding into the material rack base, which can achieve stable storage of the material trays. In addition, in the present application, the positioning column is suitable for being inserted into the positioning hole at one end and has a conical or spherical structure, which can achieve clamping without affecting the pulling and sliding of the material tray storage rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of a material tray and material rack provided in one embodiment of the present application;

[0031] Figure 2 is a schematic diagram of the three-dimensional structure of a material tray storage rack provided in one embodiment of the present application;

[0032] Figure 3 is a schematic diagram of the three-dimensional structure of a material rack base provided in one embodiment of the present application;

[0033] Figure 4 This is a schematic diagram of the structure of a material tray provided in one embodiment of the present application when discharging material against a rear baffle;

[0034] Figure 5 It is a side view of a 7-inch material tray provided in one embodiment of the present application placed on a material tray storage rack;

[0035] Figure 6 is a partial perspective view of a material tray storage rack provided in one embodiment of the present application;

[0036] Figure 7 This is a schematic diagram of the structure of a supporting wheel supporting a material storage tray 13 provided in one embodiment of the present application;

[0037] Figure 8 This is a schematic diagram of the structure of a supporting wheel supporting a material storage tray 7 provided in one embodiment of the present application;

[0038] Fig. 9 It is a comparison diagram of the supporting wheel supporting the material storage tray 13 and the material storage tray 7 provided in one embodiment of the present application;

[0039] Fig.10 This is a structural view of a material tray storage rack provided in one embodiment of the present application in a slid-out state;

[0040] Fig.11 This is a structural view of a material tray storage rack in a sliding state provided in one embodiment of the present application.

[0041] Description of Figure Numbers:

[0042] 100, material tray rack; 110, material rack base; 111, slide rail; 1111, front slide rail section; 1112, rear slide rail section; 112, side outlet; 113, first positioning hole; 114, second positioning hole; 120, material tray storage rack; 121, slider; 122, front baffle; 123, rear baffle; 124, support wheel; 125, draw hook; 126, identification code; 127, positioning column; 128, avoidance hole;

[0043] 200, material tray; 201, 7-inch material tray; 202, 13-inch material tray. DETAILED DESCRIPTION

[0044] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the specific implementation methods of the present application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other accompanying drawings and other implementation methods can be obtained based on these drawings without creative work.

[0046] In order to simplify the drawings, only the parts related to the present application are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0047] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0048] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front and back) used to explain the structure and movement of various components of the present application are not absolute but relative. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, the indications of these directions also change accordingly.

[0050] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0051] In order to solve the problem in the prior art that it is difficult to realize automatic material picking and placing by a robotic arm due to the small space between the material trays, the present application provides a material tray rack that can realize automatic material receiving and material replacement for the placement machine without stopping the SMT line, thereby greatly improving production efficiency and reducing the error rate.

[0052] In a specific embodiment, see Figures 1 to 3 A material tray rack 100 includes a material rack base 110 and a plurality of material tray storage racks 120, each material tray storage rack 120 storing at most one material tray 200. The material rack base 110 is provided with one of a slider 121 and a slide rail 111, and the bottom of the material tray storage rack 120 is provided with the other of a slider 121 and a slide rail 111, and the slider 121 is slidably arranged on the slide rail 111, so that the plurality of material tray storage racks 120 can be slid independently on the material rack base 110. In this way, when one of the material trays 200 needs to be replaced, the corresponding material tray storage rack 120 is pulled out, which can overcome the problem in the prior art that the mechanical arm is difficult to take and place materials due to the small space between the material trays 200, realize the automatic material receiving and changing of the placement machine, improve the production capacity, avoid the phenomenon of mixed material receiving or wrong storage position due to manual material changing, and reduce the error rate. In addition, the sliding fit between the tray storage rack 120 and the rack base 110 is also beneficial to the disassembly and assembly of the tray storage rack 120, thereby facilitating the cleaning of the inside of the tray 200 base and the tray storage rack 120, and is highly practical.

[0053] Specifically, the rack base 110 has a side outlet 112 at one end in the extension direction of the slide rail 111, and the plurality of tray storage racks 120 are suitable for sliding out of or into the rack base 110 from the side outlet 112. That is, the plurality of tray storage racks 120 are in and out from the same side, so that the robot arm can take and place the trays 200 in the tray rack 100 on the same side, which is convenient for operation.

[0054] For example, the slide rail 111 can be arranged on the rack base 110, and the slider 121 can be arranged on the tray storage rack 120. The slide rail 111 can adopt a whole continuous structure, extending all the way to both sides of the tray 200 base. In this case, the slider 121 can adopt a whole continuous structure or multiple discontinuous structures, and the sliding fit between the slider 121 and the slide rail 111 can be achieved.

[0055] In a specific embodiment, see Figure 3 The slide rail 111 adopts a discontinuous structure, that is, the slide rail 111 includes a front slide rail section 1111 and a rear slide rail section 1112 that are spaced apart from each other. The front slide rail section 1111 is arranged close to the side outlet 112, and there is a preset distance between the rear slide rail section 1112 and the side of the rack base 110 away from the front slide rail section 1111. The preset distance can be flexibly set according to actual conditions, and is not limited here, and is within the scope of protection of this application. At this time, the slide rail 111 adopts a whole section of continuous structure, which generally extends to both sides of the tray storage rack 120 to achieve stable sliding of the tray storage rack 120.

[0056] As a preference, see Figure 2 and Figure 3 A positioning column 127 and one of the positioning holes are provided on the rack base 110, and a positioning column 127 and the other of the positioning holes are provided at the bottom of the tray storage rack 120. The positioning column 127 is clamped in the positioning hole to limit the sliding of the tray storage rack 120 relative to the rack base 110 and prevent the tray storage rack 120 from moving.

[0057] Specifically, see Fig.10 and Fig.11 , taking the example that the positioning column 127 is provided on the tray storage rack 120 and the positioning hole is provided on the base of the tray 200, the number of the positioning column 127 on the tray storage rack 120 is one, and the number of the positioning holes on the rack base 110 is at least two, including the first positioning hole 113 and the second positioning hole 114, and each tray storage rack 120 may correspond to one first positioning hole 113 and one second positioning hole 114. When the positioning column 127 is stuck in the first positioning hole 113, the tray storage rack 120 is restricted to the state of sliding out from the rack base 110, which is convenient for the robot arm to take and replace without running; when the positioning column 127 is stuck in the second positioning hole 114, the tray storage rack 120 is restricted to the state of sliding into the rack base 110, which can achieve stable storage of the tray 200.

[0058] Preferably, see Figure 3 In this embodiment, the first positioning holes 113 corresponding to the plurality of material tray storage racks 120 can be integrated into a whole hole-shaped structure, and the second positioning holes 114 corresponding to the plurality of material tray storage racks 120 can also be integrated into a whole hole-shaped structure. That is, there are two positioning holes on the rack base 110, namely the first positioning hole 113 and the second positioning hole 114, and both the first positioning hole 113 and the second positioning hole 114 extend to both sides of the rack base 110 along a direction perpendicular to the extension direction of the slide rail 111.

[0059] In this embodiment, see Figure 2 and Figure 3 The slide rail 111 on the rack base 110 preferably adopts a discontinuous structure, that is, the slide rail 111 includes a front slide rail section 1111 and a rear slide rail section 1112 spaced apart from each other, and the first positioning hole 113 and the second positioning hole 114 can be provided on the side of the rear slide rail section 1112 away from the front slide rail section 1111. At this time, the preset distance between the rear slide rail section 1112 and the side of the rack base 110 away from the front slide rail section 1111 is adapted to the positional arrangement of the first positioning hole 113 and the second positioning hole 114, and the structural setting is more reasonable and has a high utilization rate.

[0060] Furthermore, the positioning post 127 is adapted to be inserted into the positioning hole at one end thereof and has a conical or spherical structure, which can play a certain guiding role, so that the positioning post 127 can be easily inserted into and out of the positioning hole without affecting the sliding of the material tray storage rack 120. For example, when the material tray storage rack 120 is pulled out, the positioning post 127 can be driven to disengage from the second positioning hole 114 by a certain force, thereby achieving the sliding of the material tray storage rack 120. Similarly, when the pulled-out material tray storage rack 120 needs to be put back, the positioning post 127 can be driven to disengage from the first positioning hole 113 by a certain force, thereby achieving the return of the material tray storage rack 120. In addition, the setting of the conical or spherical structure can also reduce the collision between the positioning post 127 and the material rack base 110, thereby reducing wear.

[0061] In actual production, the positioning column 127 is suitable for being inserted into one end face of the positioning hole, and a convex arc structure can also be set in the extension direction of the slide rail 111, which can also guide the positioning column 127 to enter and exit the positioning hole more easily, thereby achieving locking without affecting the pulling and sliding of the tray storage rack 120.

[0062] Furthermore, the first positioning hole 113 and the second positioning hole 114 have guide surfaces on both sides in the extension direction of the slide rail 111, which is more conducive to guiding the positioning column 127 to enter and exit the positioning hole and reduce the collision between the positioning column 127 and the rack base 110.

[0063] Specifically, see Figure 2 The tray storage rack 120 is provided with a hook 125 on one side of the slide rail 111, which is used to drive the tray storage rack 120 to slide along the extension direction of the slide rail 111. In actual production, the robot arm can drive the corresponding tray storage rack 120 to be pulled out and put back by clamping the hook 125, which is highly practical.

[0064] Among them, the material tray storage rack 120 is also provided with an identification code 126 around the hook 125, which is used for the camera on the robot arm to identify the information of the material tray storage rack 120, so that the information can be reconfirmed when the material tray 200 is automatically taken and replaced, effectively preventing material receiving errors.

[0065] In a preferred embodiment, see Figure 3 and Figure 4 The tray storage rack 120 has a front baffle 122 and a rear baffle 123 on both sides perpendicular to the extension direction of the slide rail 111, and the front baffle 122 and the rear baffle 123 are respectively used to limit the two end surfaces of the tray 200 in the axial direction. At the same time, the height of the rear baffle 123 is higher than the height of the front baffle 122.

[0066] In this embodiment, there is a height difference between the rear baffle 123 and the front baffle 122 of the tray storage rack 120, forming a long and short side design. In this way, when discharging materials, the robot arm can grab the tray 200 and discharge the materials by the long side (rear baffle 123), which is conducive to the rapid and accurate placement of the tray 200, and the operation is simple and time-saving. Moreover, when the tray 200 is discharged by the long side, the long side can effectively absorb the outward deformation of the tray 200, so that the width dimension of the tray storage rack 120 in the axial direction of the tray 200 can be set to fit the size of the tray 200 as much as possible, so as to store more trays 200 in a limited space, and ensure the vertical transportation of the material belt to prevent the material belt from being scratched and pulled. In addition, in this embodiment, the robot arm can pick up and place the tray 200 on the tray rack 100 at the side edge of the side outlet 112 of the tray rack 100, which is not easy to occupy the channel of the AGV trolley, and the space utilization rate is high.

[0067] As a preference, see Figure 1 and Figure 5 The material tray storage rack 120 provided in this embodiment is compatible with material trays of different diameters, for example, a circular material tray with a first diameter and a circular material tray with a second diameter.

[0068] Specifically, see Figures 6 to 9Four supporting wheels 124 are arranged between the front baffle 122 and the rear baffle 123. The four supporting wheels 124 are arranged in sequence along a preset arc curve, and the diameter of the arc curve is the first diameter, so that the four supporting wheels 124 can jointly support a circular material tray with a diameter of the first diameter. In addition, the perpendicular midline of the two supporting wheels 124 located on both sides is coaxial with the perpendicular midline of the two supporting wheels 124 located in the middle, and the two supporting wheels 124 located in the middle are suitable for supporting a circular material tray with a diameter of the second diameter. The first diameter is larger than the second diameter.

[0069] For example, the circular tray with the first diameter is a 13-inch tray 202, and the circular tray with the second diameter is a 7-inch tray 201. When supporting the 13-inch tray 202, the four tug wheels 124 are in contact with the circumferential surface of the 13-inch tray 202; when supporting the 7-inch tray 201, only the two middle support wheels 124 are in contact with the circumferential surface of the 7-inch tray 201. It can be understood that the two middle support wheels 124 are located at the intersection of the circumferential curve of the 13-inch tray 202 and the circumferential curve of the 7-inch tray 201, that is, the two middle support wheels 124 are located at the intersection of the arc curve with the first diameter and the arc curve with the second diameter. In this embodiment, the median perpendicular line of the two supporting wheels 124 on both sides is coaxial with the median perpendicular line of the two supporting wheels 124 in the middle, so that when the supporting wheels 124 support the 7-inch tray 201 and the 13-inch tray 202, the center of gravity (or direction of gravity) of the 7-inch tray 201 and the 13-inch tray 202 can be on the median perpendicular line, and the support is more stable. Compared with the prior art in which the 7-inch tray 201 needs to be placed at the front end of the rack and stuck, and the 13-inch tray 202 needs to be inserted into the mandrel before being placed on the rack, the supporting method of the supporting wheels 124 provided in this embodiment is obviously simpler to operate; moreover, the use of the supporting wheels 124 can achieve rolling contact between the tray 200 and the tray storage rack 120, so that the tray 200 rotates smoothly without swaying, and the feeding is stable.

[0070] In actual production, when designing the tray storage rack 120, the height of the front baffle 122 should not exceed the height of the 7-inch tray 201 when it is placed, and at the same time, the height of the rear baffle 123 should not be lower than the height of the 7-inch tray 201 when it is placed.

[0071] Specifically, see Figure 2 The front baffle 122 is provided with an avoidance hole 128, which is suitable for the robot arm to grab or place the material tray 200. In actual production, the setting of the avoidance hole 128 is also conducive to the camera on the robot arm to identify the information of the material tray 200, to prevent material picking errors, and in conjunction with the identification code 126 on the side of the hook 125, the information can be confirmed twice, greatly reducing the error rate.

[0072] In actual production, the rear baffle 123 may also be provided with an avoidance hole 128 to facilitate lightweight production. Preferably, the projection of the avoidance hole 128 on the front baffle 122 on the rear baffle 123 overlaps with the avoidance hole 128 on the rear baffle 123 .

[0073] Specifically, the top end face of the front baffle 122 is inclined, and is tilted along the extension direction of the slide rail 111 toward the side where the hook 125 is located, which is more conducive to the robot arm to take and place the material tray 200; relatively, the top end face of the rear baffle 123 is also inclined, and is arranged parallel to the inclined surface on the front baffle 122.

[0074] In an exemplary embodiment, the material tray rack 100 further includes a transport vehicle, which is located below the rack base 110 and is used to drive the material tray rack 100 to move.

[0075] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0076] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of this application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications should also be regarded as the protection scope of this application.

Claims

1. A tray rack, characterized in that: include: A material rack base, wherein the material rack base is provided with one of a slide block and a slide rail; A plurality of material tray storage racks, wherein the bottom of the material tray storage rack is provided with a slider or a slide rail, wherein the slider is slidably mounted on the slide rail, so that the plurality of material tray storage racks can be independently slidably mounted on the material rack base; and each of the material tray storage racks can store at most one material tray; Among them, the material tray storage rack has a front baffle and a rear baffle on both sides perpendicular to the extension direction of the slide rail, and the front baffle and the rear baffle are respectively used to limit the two end surfaces of the material tray in the axial direction, and the height of the rear baffle is higher than the height of the front baffle.

2. The tray rack according to claim 1, characterized in that: Four supporting wheels are arranged between the front baffle and the rear baffle, and the four supporting wheels are arranged in sequence along a preset circular arc curve, the circular arc curve has a first diameter, and the four supporting wheels are suitable for supporting circular material trays with a diameter of the first diameter; wherein the perpendicular bisectors of the two supporting wheels located on both sides are coaxial with the perpendicular bisectors of the two supporting wheels located in the middle, and the two supporting wheels located in the middle are suitable for supporting circular material trays with a diameter of the second diameter; wherein the size of the first diameter is greater than the size of the second diameter.

3. The tray rack according to claim 2, characterized in that: The two middle supporting wheels are located at the circumference intersection of the circular arc curve with the first diameter and the circular arc curve with the second diameter.

4. The tray rack according to claim 1, characterized in that: The front baffle and the rear baffle are both provided with avoidance holes, which are suitable for the robot arm to grab or place the tray; Wherein, a projection of the avoidance hole of the front baffle on the rear baffle coincides with the avoidance hole on the rear baffle.

5. The tray rack according to any one of claims 1 to 4, characterized in that: The material rack base has a side outlet at one end in the extending direction of the slide rail, and the material tray storage rack is suitable for sliding out of or into the material rack base from the side outlet.

6. The material tray rack according to claim 5, characterized in that: The tray storage rack is provided with a hook on one side of the slide rail in the extension direction, which is used to drive the tray storage rack to slide along the extension direction of the slide rail.

7. The material tray rack according to claim 6, characterized in that: The top end surface of the front baffle is an inclined surface, and is arranged obliquely toward one side of the draw hook along the extending direction of the slide rail.

8. The material tray rack according to claim 6, characterized in that: An identification code is arranged around the hook to identify the information of the tray storage rack.

9. The tray rack according to any one of claims 1 to 4, characterized in that: The material rack base is provided with one of a positioning column and a positioning hole, and the bottom of the material tray storage rack is provided with the other of a positioning column and a positioning hole. The positioning column is clamped in the positioning hole to limit the sliding of the material tray storage rack relative to the material rack base.

10. The material tray rack according to claim 9, characterized in that: The positioning column is arranged on the material tray storage rack, and the number of the positioning column on each material tray storage rack is one; the positioning hole is arranged on the material rack base, including a first positioning hole and a second positioning hole; when the positioning column is clamped in the first positioning hole, the material tray storage rack is restricted to a state of sliding out from the material rack base; when the positioning column is clamped in the second positioning hole, the material tray storage rack is restricted to a state of sliding into the material rack base; and / or One end of the positioning post that is suitable for passing through the positioning hole is in a conical or spherical structure.

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