Material box leveling mechanism and laminated sheet transfer device

Abstract

The utility model discloses a material box leveling mechanism and a laminated sheet transfer device.The material box leveling mechanism comprises a material box bearing table and a leveling assembly, the material box bearing table is used for bearing a material box loaded with laminated sheets, the material box comprises a bottom plate and a bearing part installed on the bottom plate, the bearing part is provided with an inclined face for bearing the laminated sheets, and the leveling assembly is arranged on the inclined face; the bearing part is provided with a limiting part for limiting the lamination on the inclined surface; the leveling assembly is arranged below the material box bearing table, and the leveling assembly is configured to turn over the material boxes located on the material box bearing table so as to drive the laminations in the material boxes to be turned over to the horizontal state. According to the material box leveling mechanism, the material box located on the material box bearing table is overturned, so that the laminated sheets in the material box are overturned to be in a horizontal state, the laminated sheet carrying mechanism can horizontally grab the laminated sheets in the material box, and damage to silicon wafers when the laminated sheet carrying mechanism obliquely grabs the laminated sheets is avoided; and meanwhile, the laminated sheet carrying mechanism can be conveniently controlled to grab the laminated sheets, so that the laminated sheet carrying mechanism can grab the laminated sheets conveniently.

Description

Technical Field

[0001] The present application belongs to the technical field of silicon wafer conveying equipment, and in particular relates to a material box leveling mechanism and a stacking transfer device. Background Art

[0002] After the silicon wafers are tested, they will be sent to the corresponding material box according to the different test results to realize the sorting of silicon wafers. The silicon wafers are stacked in the material box to form a stack. When the silicon wafers in the material box are full, the material box and the stack need to be sent to the next process. In order to prevent the silicon wafers from shifting in the material box, the stack is generally placed in the material box at an angle.

[0003] When the stack needs to be transported to the next process, the stack in the material box is generally grabbed by the stack handling mechanism and brought to the material use station. However, since the stack in the material box is tilted, the stack handling mechanism needs to grab the stack at an angle, which can easily damage the silicon wafer. Utility Model Content

[0004] The purpose of the present application is to provide a material box leveling mechanism to solve the problem in the prior art that the stack handling mechanism needs to be tilted to grab the stacks in the material box, which is easy to damage the silicon wafers; in addition, another purpose of the present application is to provide a stack transfer device including the above-mentioned material box leveling mechanism.

[0005] To achieve this goal, this application adopts the following technical solutions:

[0006] A material box leveling mechanism, comprising a material box bearing platform and a leveling component, wherein:

[0007] The material box bearing platform is used to bear the material box loaded with the stacked sheets, the material box comprises a bottom plate and a bearing member mounted on the bottom plate, the bearing member has an inclined surface for bearing the stacked sheets, and the bearing member is provided with a limiting member for limiting the stacked sheets on the inclined surface;

[0008] The leveling component is disposed below the material box supporting platform, and the leveling component is configured to flip the material box located on the material box supporting platform to drive the stacked sheets in the material box to flip to a horizontal state.

[0009] The leveling component of the material box leveling mechanism proposed in the present application flips the material box located on the material box support table so that the stack in the material box is flipped to a horizontal state, and the stack conveying mechanism can horizontally grasp the stack in the material box, thereby avoiding damage to the silicon wafer when the stack conveying mechanism grabs the stack at an angle; at the same time, because the stack conveying mechanism grabs the stack in the material box horizontally, it is also convenient to control the stack conveying mechanism grabbing the stack, which facilitates the stack conveying mechanism to grab the stack.

[0010] In some embodiments, the leveling assembly includes a first drive member and a mounting member, wherein:

[0011] The fixed end of the first driving member is mounted on the mounting member, the first end of the material box bearing platform is hinged on the mounting member, and the second end of the material box bearing platform is hinged on the driving end of the first driving member;

[0012] The first driving member is configured to drive the second end of the material box supporting platform to rotate around the first end of the material box supporting platform to drive the stacked sheets in the material box to flip to a horizontal state.

[0013] By hingedly connecting the first end of the material box support platform to the mounting member and hingedly connecting the second end of the material box support platform to the driving end of the first driving member, the material box support platform is driven to flip by the first driving member to drive the stacked sheets in the material box to flip to a horizontal state; a leveling component with a simple structure and easy implementation is provided.

[0014] In some embodiments, the leveling assembly further includes a second driving member and a base plate, wherein a fixed end of the second driving member is mounted on the base plate, and a driving end of the second driving member is connected to the mounting member.

[0015] The second driving member is configured to drive the mounting member to move alternately to the first position or the second position along the horizontal direction;

[0016] After the second driving member drives the mounting member to move from the first position to the second position, the stack conveying mechanism moves to the second position and grabs the stack in the leveled material box;

[0017] After the stack handling mechanism grabs the stack, the second driving member drives the mounting member to retreat from the second position to the first position;

[0018] or,

[0019] After the stack conveying mechanism grabs the stack in the leveled material box, the second driving member drives the mounting member to move from the first position to the second position. After the stack conveying mechanism takes away the stack, the second driving member drives the mounting member to return from the second position to the first position.

[0020] By setting up a second driving member, horizontal movement of the mounting member is achieved, so as to drive the material box supporting platform to move horizontally, thereby preventing the stacking mechanism from rubbing against the limiting member of the material box when grabbing the stacking in the material box, thereby protecting the stacking; at the same time, two different application scenarios are provided to meet different application requirements and have good compatibility.

[0021] In some embodiments, the leveling assembly further includes a detection member, which is configured to detect whether there is a material box above the material box supporting platform.

[0022] Through the detection part, automatic detection of whether there is a material box above the material box bearing platform is achieved, so as to control the operation of the leveling component.

[0023] In some embodiments, a support member is disposed on the mounting member, and the first driving member is configured to drive the second end of the material box supporting platform to flip to a low position or a high position;

[0024] When the second end of the material box bearing platform is in a low position, the support member is configured to support the second end of the material box bearing platform;

[0025] When the second end of the material box supporting platform is in a high position, the stacked sheets in the material box are in a horizontal state.

[0026] By setting up the support member, the second end of the material box support platform is supported when the second end of the material box support platform is in a low position, so as to improve the stability and reliability of the support of the material box support platform; at the same time, it can also avoid long-term stress on the driving end of the first driving member, which is beneficial to extending the service life of the first driving member.

[0027] In some embodiments, a positioning assembly is provided between the material box supporting platform and the bottom plate of the material box, and the positioning assembly is configured to position the material box on the material box supporting platform so that the material box cannot slide relative to the material box supporting platform.

[0028] By setting up the positioning component, the material box is fixed relative to the material box supporting platform, which prevents the material box from sliding horizontally relative to the material box supporting platform when the second driving member drives the material box supporting platform to move horizontally, thereby ensuring the position accuracy of the material box on the material box supporting platform and facilitating the stacking mechanism to grab the stacks in the material box.

[0029] In some embodiments, the positioning assembly includes at least one positioning pin and at least one positioning sleeve, each positioning pin corresponds to a positioning sleeve, the positioning pin is vertically fixed on the material box bearing platform, and the positioning sleeve is fixed on the bottom plate;

[0030] The positioning pin is inserted into the corresponding positioning sleeve to position the material box on the material box bearing platform.

[0031] By inserting the positioning pin into the corresponding positioning sleeve, the material box is positioned on the material box bearing table, thereby providing a positioning component with a simple structure and low cost.

[0032] The present application also provides a stack transfer device, which includes a material box conveying line and the above-mentioned material box leveling mechanism, wherein:

[0033] A loading station is arranged on the conveying path of the material box conveying line, and the material box conveying line is configured to convey the material box with the stacked sheets to the loading station, and the material box leveling mechanism is arranged at the loading station;

[0034] The material box leveling mechanism also includes a third driving member, which is used to drive the material box supporting platform and the leveling assembly to rise and fall in the vertical direction.

[0035] Through the material box conveyor line, the material box containing the stacked sheets is automatically conveyed to the loading station, and through the material box leveling mechanism, the stacked sheets in the material box at the loading station are automatically adjusted to a horizontal state to avoid damage to the silicon wafers when the stack handling mechanism is tilted to grab the stacked sheets, and it also makes it easier for the stack handling mechanism to grab the stacked sheets, which is beneficial to improving the transportation efficiency of the stacked sheets; through the third driving member, the material box support platform and the leveling assembly are driven to rise and fall, so that the material box containing the stacked sheets can be leveled after it is lifted above the conveying surface of the material box conveyor line, which is convenient for leveling the stacked sheets in the material box at the loading station.

[0036] In some embodiments, the material box conveyor line includes a conveyor frame and two conveyor belts, which are arranged in parallel and rotatably mounted on the conveyor frame. The two conveyor belts are configured to carry and convey material boxes containing stacked sheets. The material box carrying platform and the leveling assembly are arranged below the loading station and between the two conveyor belts.

[0037] By setting up a material box conveyor line and arranging the material box support platform and the leveling assembly below the loading station and between two conveyor belts, the space of the material box conveyor line can be reasonably utilized, providing a material box conveyor line with a compact structure and small space occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the three-dimensional structure of the material box leveling mechanism provided in an embodiment of the present application;

[0039] Figure 2 It is a schematic diagram of the three-dimensional structure of the stacking transfer device provided in an embodiment of the present application.

[0040] Figure 1 to Figure 2 The following reference numerals are included:

[0041] The material box leveling mechanism 10 includes a material box carrying platform 11, a leveling assembly 12, a first driving member 120, a mounting member 121, a second driving member 122, a base plate 123, a detection member 124, a support member 125, and a third driving member 126;

[0042] Lamination 20;

[0043] Material box 30: bottom plate 300, limiting member 301, connecting member 302;

[0044] Articulated joint 40;

[0045] Positioning assembly 50: positioning pin 51, positioning sleeve 52;

[0046] Material box conveying line 60: conveying frame 61, conveying belt 62. DETAILED DESCRIPTION

[0047] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0048] After the silicon wafers are tested, they will be sent to the corresponding material box according to the different test results to realize the sorting of silicon wafers. The silicon wafers are stacked in the material box to form a stack. When the silicon wafers in the material box are full, the material box and the stack need to be sent to the next process. In order to prevent the silicon wafers from shifting in the material box, the stack is generally placed in the material box at an angle.

[0049] When the stack needs to be transported to the next process, the stack in the material box is generally grabbed by the stack handling mechanism and brought to the material use station. However, since the stack in the material box is tilted, the stack handling mechanism needs to grab the stack at an angle, which can easily damage the silicon wafer.

[0050] Therefore, this application provides a material box leveling mechanism, please refer to Figure 1 and Figure 2 As shown, the material box leveling mechanism 10 provided in the embodiment of the present application includes a material box supporting platform 11 and a leveling component 12, wherein: the material box supporting platform 11 is used to support a material box 30 loaded with stacking sheets 20, the material box 30 includes a base plate 300 and a supporting member (illustrated in the figure) installed on the base plate 300, the supporting member has an inclined surface for supporting the stacking sheets 20, and the supporting member is provided with a limiting member 301 for limiting the stacking sheets 20 on the inclined surface; the leveling component 12 is arranged below the material box supporting platform 11, and the leveling component 12 is configured to flip the material box 30 located on the material box supporting platform 11 to drive the stacking sheets 20 in the material box 30 to flip to a horizontal state.

[0051] Specifically, the bearing member is a flat plate inclined at a preset angle to form an inclined surface for bearing the stack 20 ; a connecting member 302 is installed on the bottom plate 300 , the bottom end of the connecting member 302 is fixed on the bottom plate 300 , and the bearing member is installed on the top end of the connecting member 302 .

[0052] It can be seen that the leveling component 12 of the material box leveling mechanism 10 proposed in the present application flips the material box 30 located on the material box support platform 11, so that the stack 20 in the material box 30 is flipped to a horizontal state, and the stack conveying mechanism can horizontally grasp the stack 20 in the material box 30, thereby avoiding damage to the silicon wafer when the stack conveying mechanism grasps the stack 20 at an angle; at the same time, because the stack conveying mechanism adopts the horizontal grasping of the stack in the material box, it is also convenient to control the stack conveying mechanism to grasp the stack, which facilitates the stack conveying mechanism to grasp the stack.

[0053] See also Figure 1As shown, as an embodiment, the leveling assembly 12 includes a first driving member 120 and a mounting member 121, wherein: the fixed end of the first driving member 120 is mounted on the mounting member 121, the first end of the material box support platform 11 is hinged on the mounting member 121, and the second end of the material box support platform 11 is hinged on the driving end of the first driving member 120; the first driving member 120 is configured to drive the second end of the material box support platform 11 to rotate around the first end of the material box support platform 11, so as to drive the stack 20 in the material box 30 to flip to a horizontal state.

[0054] Specifically, the first driving member 120 adopts a cylinder, the mounting member 121 is a horizontally mounted plate structure, the first end of the material box supporting platform 11 is hinged to the mounting member 121 through an articulated pair 40 composed of an articulated seat and an articulated shaft, and the second end of the material box supporting platform 11 is hinged to the driving end of the first driving member 120 through an articulated pair 40 composed of an articulated seat and an articulated shaft.

[0055] It can be seen that by hingedly connecting the first end of the material box support platform 11 to the mounting member 121 and hingedly connecting the second end of the material box support platform 11 to the driving end of the first driving member 120, the material box support platform 11 is driven to flip by the first driving member 120, so as to drive the stack 20 in the material box 30 to flip to a horizontal state; a leveling component 12 with a simple structure and easy implementation is provided.

[0056] As an embodiment, the leveling assembly 12 further includes a second driving member 122 and a base plate 123, the fixed end of the second driving member 122 is mounted on the base plate 123, the driving end of the second driving member 122 is connected to the mounting member 121, and the second driving member 122 is configured to drive the mounting member 121 to move alternately to the first position or the second position in the horizontal direction; after the second driving member 122 drives the mounting member 121 to move from the first position to the second position, the stack conveying mechanism moves to the second position and grabs the stack 20 in the material box 30 after leveling; after the stack conveying mechanism grabs the stack 20, the second driving member 122 drives the mounting member 121 to retreat from the second position to the first position;

[0057] Alternatively, after the stack handling mechanism grabs the stack 20 in the leveled material box 30, the second driving member 122 drives the mounting member 121 to move from the first position to the second position. After the stack handling mechanism takes away the stack, the second driving member 122 drives the mounting member 121 from the second position back to the first position.

[0058] Specifically, the second driving member 122 is a horizontally installed cylinder.

[0059] It can be seen that by setting the second driving member 122, the horizontal movement of the mounting member 121 is realized, so as to drive the material box supporting platform 11 to move horizontally, thereby preventing the stacking sheet 20 from rubbing against the limiting member 301 of the material box 30 when the stacking sheet transporting mechanism grabs the stacking sheet 20 in the material box 30, thereby protecting the stacking sheet 20; at the same time, two different application scenarios are provided to meet different application requirements and have good compatibility.

[0060] As an embodiment, the leveling assembly 12 further includes a detection member 124 , and the detection member 124 is configured to detect whether there is a material box 30 above the material box supporting platform 11 .

[0061] It can be seen that the detection member 124 can automatically detect whether there is a material box 30 above the material box support platform 11 , and when it is detected that there is a material box 30 above the material box support platform 11 , a command is issued to control the leveling component 12 to work.

[0062] As an embodiment, a support member 125 is provided on the mounting member 121, and the first driving member 120 is configured to drive the second end of the material box supporting platform 11 to flip to a low position or a high position; when the second end of the material box supporting platform 11 is in a low position, the support member 125 is configured to support the second end of the material box supporting platform 11; when the second end of the material box supporting platform 11 is in a high position, the stack 20 in the material box 30 is in a horizontal state.

[0063] It can be seen that by setting the support member 125, the second end of the material box support platform 11 is supported when the second end of the material box support platform 11 is in a low position, so as to improve the stability and reliability of the support of the material box support platform 11; at the same time, it can also avoid the driving end of the first driving member 120 from being subjected to long-term force, which is beneficial to extending the service life of the first driving member 120.

[0064] As an embodiment, a positioning assembly 50 is provided between the material box supporting platform 11 and the bottom plate of the material box 30 , and the positioning assembly 50 is configured to position the material box 30 on the material box supporting platform 11 so that the material box 30 cannot slide relative to the material box supporting platform 11 .

[0065] It can be seen that by setting the positioning component 50, the material box 30 is fixed relative to the material box support platform 11, which prevents the material box 30 from sliding horizontally relative to the material box support platform 11 when the second driving member 122 drives the material box support platform 11 to move horizontally, thereby ensuring the position accuracy of the material box 30 on the material box support platform 11, and facilitating the stacking mechanism to grab the stacks in the material box.

[0066] As an embodiment, the positioning assembly 50 includes at least one positioning pin 51 and at least one positioning sleeve 52, each positioning pin 51 corresponds to a positioning sleeve 52, the positioning pin 51 is vertically fixed on the material box support platform 11, and the positioning sleeve 52 is fixed on the bottom plate 300; the positioning pin 51 is inserted into the corresponding positioning sleeve 52 to position the material box 30 on the material box support platform 11.

[0067] It can be seen that by inserting the positioning pin 51 into the corresponding positioning sleeve 52, the material box 30 is positioned on the material box bearing platform 11. A positioning assembly 50 with a simple structure and low cost is provided.

[0068] The present application provides a material box leveling mechanism with the following advantages:

[0069] 1) By flipping the material box, the stacked sheets in the material box are flipped to a horizontal state, so that the stacked sheet handling mechanism can horizontally grab the stacked sheets in the material box, thereby avoiding damage to the silicon wafers when the stacked sheet handling mechanism tilts to grab the stacked sheets;

[0070] 2) When the stacking conveying mechanism grabs the stacking sheets, it can avoid the stacking sheets in the horizontal direction to prevent the stacking sheets from rubbing against the limiting parts of the material box, thereby protecting the stacking sheets;

[0071] 3) The positioning assembly is used to fix the material box relative to the material box bearing platform, thereby preventing the material box from sliding horizontally relative to the material box bearing platform when the second driving member drives the material box bearing platform to move horizontally, thereby ensuring the position accuracy of the material box on the material box bearing platform;

[0072] 4) The overall structure is simple, the cost is low and the space occupied is small.

[0073] Please refer again Figure 1 and Figure 2 As shown, the present application also provides a stack transfer device, which includes a material box conveyor line 60 and the above-mentioned material box leveling mechanism 10, wherein: a loading station is arranged on the conveying path of the material box conveyor line 60, the material box conveyor line 60 is configured to convey the material box 30 containing the stack 20 to the loading station, and the material box leveling mechanism 10 is arranged at the loading station; the material box leveling mechanism 10 also includes a third driving member 126, and the third driving member 126 is used to drive the material box support platform 11 and the leveling assembly 12 to rise and fall in the vertical direction.

[0074] Specifically, the third driving member 126 is a cylinder, and the base plate 123 is installed on the driving end of the third driving member 126 .

[0075] It can be seen that, through the material box conveyor line 60, the material box 30 containing the stacking sheets 20 is automatically conveyed to the loading station, and the material box leveling mechanism 10 is used to automatically adjust the stacking sheets 20 in the material box 30 at the loading station to a horizontal state, so as to avoid damage to the silicon wafer when the stacking sheet handling mechanism is tilted to grab the stacking sheets 20, and at the same time, it is convenient for the stacking sheet handling mechanism to grab the stacking sheets 20, which is beneficial to improve the transportation efficiency of the stacking sheets; through the third driving member 126, it is realized to drive the material box supporting platform 11 and the leveling component 12 to rise and fall, so that the material box 30 containing the stacking sheets 20 is leveled after it rises to above the conveying surface of the material box conveyor line 30, which is convenient for leveling the stacking sheets 20 in the material box 30 at the loading station; at the same time, the third driving member 126 drives the material box supporting platform 11 and the leveling component 12 to rise, so that the positioning pin 51 on the material box supporting platform 11 is inserted into the corresponding positioning sleeve 52, so as to position the material box 30 on the material box supporting platform 11.

[0076] As an embodiment, the material box conveyor line 60 includes a conveyor frame 61 and two conveyor belts 62. The two conveyor belts 62 are arranged in parallel and rotatably installed on the conveyor frame 61. The two conveyor belts 62 are configured to carry and convey the material box 30 containing the stack 20. The material box support platform 11 and the leveling assembly 12 are arranged below the loading station and between the two conveyor belts 62.

[0077] It can be seen that by setting up the material box conveyor line 60 and setting the material box support platform 11 and the leveling assembly 12 below the loading station and between the two conveyor belts 62, the space of the material box conveyor line 60 can be reasonably utilized, providing a material box conveyor line 60 with a compact structure and small space occupation.

[0078] The above embodiments are only to illustrate the basic principles and characteristics of the present application. The present application is not limited by the above examples. Without departing from the spirit and scope of the present application, the present application may be subject to various changes and modifications, which are within the scope of the present application to be protected. The scope of protection claimed in the present application is defined by the attached claims and their equivalents.

Claims

1. A material box leveling mechanism, characterized in that: The material box leveling mechanism comprises a material box bearing platform and a leveling component, wherein: The material box carrying platform is used to carry the material box loaded with stacked sheets, the material box comprises a bottom plate and a carrying member mounted on the bottom plate, the carrying member has an inclined surface for carrying the stacked sheets, and the carrying member is provided with a limiting member for limiting the stacked sheets on the inclined surface; The leveling assembly is disposed below the material box supporting platform, and is configured to flip the material box located on the material box supporting platform to drive the stacked sheets in the material box to flip to a horizontal state.

2. The material box leveling mechanism according to claim 1, characterized in that: The leveling assembly comprises a first driving member and a mounting member, wherein: The fixed end of the first driving member is mounted on the mounting member, the first end of the material box bearing platform is hinged on the mounting member, and the second end of the material box bearing platform is hinged on the driving end of the first driving member; The first driving member is configured to drive the second end of the material box supporting platform to rotate around the first end of the material box supporting platform to drive the stacked sheets in the material box to flip to a horizontal state.

3. The material box leveling mechanism according to claim 2, characterized in that: The leveling assembly further includes a second driving member and a base plate, wherein a fixed end of the second driving member is mounted on the base plate, and a driving end of the second driving member is connected to the mounting member. The second driving member is configured to drive the mounting member to move alternately to the first position or the second position along the horizontal direction; After the second driving member drives the mounting member to move from the first position to the second position, the stack conveying mechanism moves to the second position and grabs the stack in the material box after leveling; After the stack handling mechanism grabs the stack, the second driving member drives the mounting member to retreat from the second position to the first position; or, After the stack conveying mechanism grabs the stack in the material box after leveling, the second driving member drives the mounting member to move from the first position to the second position. After the stack conveying mechanism takes away the stack, the second driving member drives the mounting member to return from the second position to the first position.

4. The material box leveling mechanism according to claim 3, characterized in that: The leveling assembly further includes a detection member, which is configured to detect whether there is a material box above the material box carrying platform.

5. The material box leveling mechanism according to claim 2, characterized in that: A support member is provided on the mounting member, and the first driving member is configured to drive the second end of the material box bearing platform to flip to a low position or a high position; When the second end of the material box carrying platform is at the low position, the support member is configured to support the second end of the material box carrying platform; When the second end of the material box supporting platform is at the high position, the stacked sheets in the material box are in a horizontal state.

6. The material box leveling mechanism according to claim 3, characterized in that: A positioning component is provided between the material box supporting platform and the bottom plate of the material box, and the positioning component is configured to position the material box on the material box supporting platform so that the material box cannot slide relative to the material box supporting platform.

7. The material box leveling mechanism according to claim 6, characterized in that: The positioning assembly includes at least one positioning pin and at least one positioning sleeve, each positioning pin corresponds to one positioning sleeve, the positioning pin is vertically fixed on the material box bearing platform, and the positioning sleeve is fixed on the bottom plate; The positioning pin is inserted into the corresponding positioning sleeve to position the material box on the material box supporting platform.

8. A stacking transfer device, characterized in that: The stack transfer device comprises a material box conveying line and a material box leveling mechanism as claimed in any one of claims 1 to 7, wherein: A loading station is provided on the conveying path of the material box conveying line, and the material box conveying line is configured to convey the material box with the stacked sheets to the loading station, and the material box leveling mechanism is provided at the loading station; The material box leveling mechanism further includes a third driving member, and the third driving member is used to drive the material box supporting platform and the leveling assembly to rise and fall in the vertical direction.

9. The stack transfer device according to claim 8, characterized in that: The material box conveyor line includes a conveyor frame and two conveyor belts, wherein the two conveyor belts are arranged in parallel and rotatably mounted on the conveyor frame, and the two conveyor belts are configured to carry and convey the material box with stacked sheets, and the material box carrying platform and leveling assembly are arranged below the loading station and between the two conveyor belts.

Images