Conveying mechanism of computer production assembly line
By designing a computer production assembly line conveyor mechanism for automatic detection, clamping and storage components, the problem of automatic detection and distinction of parts in the prior art is solved, efficient part detection and sorting is achieved, product pass rate is improved and labor costs are reduced.
Patent Information
- Application Number
- CN202411958842.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-03-18
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing computer production assembly line conveyor mechanism cannot automatically detect parts, resulting in poor inspection results and the inability to distinguish qualified parts from unqualified parts, resulting in a decrease in product pass rate.
A conveying mechanism for computer production assembly lines is designed, including a fixed bracket, a transmission roller, a conveying belt, a detection assembly, a clamp assembly and a storage assembly. The detection assembly includes a curved guide rod, a camera and a PLC controller for automatically detecting parts; the clamping assembly is used to clamp qualified parts; and the storage assembly is used to store unqualified parts.
Automatic inspection and sorting of parts is realized, product qualification rate is improved, manual inspection costs are reduced, and the operation convenience of the conveying mechanism is improved.
Smart Images

Figure CN119637490A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of automated production lines, and in particular to a conveying mechanism for a computer production assembly line. Background Art
[0002] An electronic computer (i.e., a computer) can perform numerical calculations and logical calculations, has storage and memory functions, can run according to a program, and automatically and quickly process massive amounts of data. It consists of a hardware system and a software system, and a computer without any software installed is called a bare metal. Computers are used as control systems for various industrial and consumer devices, including simple special-purpose equipment, industrial equipment, and general-purpose equipment. However, in the production process of computers, a conveying mechanism is often used to convey computer components to the production line for production. However, during the use of existing conveying mechanisms, only parts can be conveyed, and parts cannot be automatically detected during the conveying process. Most of them rely on manual identification, which has a poor detection effect, and parts cannot be distinguished after the detection is completed, which will lead to confusion between qualified parts and unqualified parts, thereby reducing the product qualification rate. It should be noted that the above introduction to the background technology is only for the convenience of a clear and complete description of the technical solution of the present application, and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are known to those skilled in the art simply because these solutions are described in the background technology section of the present application. Summary of the invention
[0003] The purpose of the present invention is to disclose a conveying mechanism for a computer production assembly line to solve the above-mentioned technical problems, and in particular to improve the operational convenience of the conveying mechanism and reduce labor costs.
[0004] To achieve the above object, the present invention provides a conveying mechanism for a computer production assembly line, comprising:
[0005] The fixing bracket has transmission rollers at both ends of the inner wall of the fixing bracket, and a conveying belt is arranged outside the transmission roller, supporting legs distributed at equal distances are welded on the outer walls on both sides of the bottom of the fixing bracket, and sliding grooves are opened on the outer walls on the opposite sides of the supporting legs, a sliding block is embedded in the inner wall of the sliding groove, and the sliding block is connected with a moving component, a detection component is installed at one end of the top of the fixing bracket, and the detection component includes an arc-shaped guide rod fixed on the fixing bracket, a support frame is welded on the top of the arc-shaped guide rod, and a camera is fixed on the outer wall of the bottom of the support frame, a first clamping component is installed on the outer wall of one side of the fixing bracket, and a second clamping component is installed on the outer wall of the other side of the fixing bracket, the first clamping component and the second clamping component both include a guide rail, and a threaded rod is arranged inside the guide rail, a driving motor is connected to the outer wall of one side of the threaded rod, and a guide block is screwed on the outer wall in the middle of the threaded rod.
[0006] As a further improvement of the present invention, a first clamping plate is welded to the guide block, and a second clamping plate is welded to the bottom of the guide rail, the bottom of the guide rail is fixed to the bottom of the rotating disk, and a rotating motor is connected to the center position of the bottom of the rotating disk, one side of the first clamping assembly and the second clamping assembly is provided with a storage assembly, and the storage assembly includes a fixed plate, an infrared sensor is installed on the outer wall of one side of the top of the fixed plate, and an electric telescopic rod is installed on the outer wall of the bottom of the fixed plate, and the bottom of the electric telescopic rod is fixed on the base.
[0007] As a further improvement of the present invention, a PLC controller is installed on the outer wall of one side of the fixed bracket, and the signal end of the PLC controller is connected to the driving motor, the rotating motor, the infrared sensor and the electric telescopic rod through a signal line.
[0008] As a further improvement of the present invention, the inner wall size of the sliding groove is matched with the size of the sliding block, and the sliding groove and the sliding block form a sliding fit, the inner wall of the sliding groove is a T-shaped structure, and the sliding block is a T-shaped structure.
[0009] As a further improvement of the present invention, the moving assembly includes a load-bearing rod, and a hydraulic rod is fixed to the center position of the bottom of the load-bearing rod by bolts, a mounting plate is fixed to the bottom of the hydraulic rod by bolts, and guide wheels are fixed to the four corners of the bottom of the mounting plate.
[0010] As a further improvement of the present invention, the storage assembly includes a storage box, and the inner walls on both sides of the storage box are fixed with fixed blocks distributed at equal distances, and two symmetrically distributed insertion rods are welded to the outer wall of the bottom of the storage box, and the insertion rods are inserted into a fixed plate with a slot on the top.
[0011] As a further improvement of the present invention, the camera is externally connected to a computer via a wire, and the PLC controller is connected to a switch via a wire, and the switch is connected to an external power supply.
[0012] As a further improvement of the present invention, a transparent glass cover is clamped on the outer wall of the top of the fixing bracket, and rectangular notches are provided on both sides of the transparent glass cover.
[0013] As a further improvement of the present invention, the storage component and the first clamping component are located in the same straight line, and the storage component and the first clamping component are both perpendicular to the fixed bracket, and the storage component and the second clamping component are located in the same straight line, and the storage component and the second clamping component are both perpendicular to the fixed bracket.
[0014] As a further improvement of the present invention, the first clamping plate is located above the second clamping plate, and the first clamping plate and the second clamping plate are located in the same vertical plane, anti-slip pads are bonded to the outer walls on the opposite sides of the first clamping plate and the second clamping plate, and a gap is provided between the bottom of the second clamping plate and the top of the conveyor belt.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] The conveying mechanism of the computer production assembly line disclosed in the present application has the technical effects of simple operation and low labor cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is an overall stereogram of the conveying mechanism of the computer production assembly line of the present invention;
[0018] Figure 2 A perspective view of the overall back side of the conveying mechanism of the computer production assembly line of the present invention;
[0019] Figure 3 It is an overall sectional stereoscopic view of the conveying mechanism of the computer production assembly line of the present invention;
[0020] Figure 4 It is an overall sectional stereoscopic view of the conveying mechanism of the computer production assembly line of the present invention;
[0021] Figure 5 It is an overall sectional stereoscopic view of the conveying mechanism of the computer production assembly line of the present invention;
[0022] Figure 6 A perspective view of a storage assembly of a conveyor mechanism of a computer production assembly line of the present invention;
[0023] Figure 7 A three-dimensional view of a clamping assembly of a conveying mechanism of a computer production assembly line according to the present invention.
[0024] The reference numerals in the aforementioned drawings are explained as follows:
[0025] 1-fixed bracket, 2-drive roller, 3-conveyor belt, 4-support leg, 5-sliding groove, 6-sliding block, 7-moving component, 701-load-bearing rod, 702-hydraulic rod, 703-guide wheel, 8-detection component, 801-arc guide rod, 802-support frame, 803-camera, 9-first clamping component, 901-second clamping component, 902-guide rail, 903-threaded rod, 904-drive motor, 905-guide block, 906-first clamping plate, 907-second clamping plate, 908-rotating disc, 909-rotating motor, 10-storage component, 1001-storage box, 1002-fixed block, 1003-insertion rod, 1004 slot, 1005-fixed plate, 1006-infrared sensor, 1007-electric telescopic rod, 1008-base, 11-PLC controller. DETAILED DESCRIPTION
[0026] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.
[0027] Qualified parts based on Figures 1 to 7 The disclosed computer production assembly line conveying mechanism (hereinafter referred to as "conveyance mechanism") is used for conveying, as shown below.
[0028] Specifically, the conveying mechanism includes: a fixed bracket 1, a transparent glass cover is clamped on the top outer wall of the fixed bracket 1, and rectangular notches are provided on both sides of the transparent glass cover, transmission rollers 2 are provided at both ends of the inner wall of the fixed bracket 1, and a conveying belt 3 is provided outside the transmission roller 2, and support legs 4 are welded to the outer walls of both sides of the bottom of the fixed bracket 1 at equal distances, and the outer walls of the opposite sides of the support legs 4 are provided with sliding grooves 5, the inner wall of the sliding groove 5 is embedded with a sliding block 6, and the sliding block 6 is connected to a moving component 7, the inner wall size of the sliding groove 5 is adapted to the size of the sliding block 6, and the sliding groove 5 and the sliding block 6 form a sliding fit, and the sliding The inner wall of the groove 5 is a T-shaped structure, and the sliding block 6 is a T-shaped structure. The moving component 7 includes a load-bearing rod 701, and a hydraulic rod 702 is fixed by bolts at the center position of the bottom of the load-bearing rod 701. A mounting plate is fixed by bolts at the bottom of the hydraulic rod 702, and guide wheels 703 are fixed at the four corners of the bottom of the mounting plate. A detection component 8 is installed at one end of the top of the fixed bracket 1, and the detection component 8 includes an arc-shaped guide rod 801 fixed on the fixed bracket 1. The camera 803 is externally connected to a computer through a wire, and the PLC controller 11 is connected to a switch through a wire, and the switch is connected to an external power supply.
[0029] A support frame 802 is welded to the top of the arc-shaped guide rod 801, and a camera 803 is fixed to the outer wall of the bottom of the support frame 802. A first clamping assembly 9 is installed on the outer wall of one side of the fixed bracket 1, and a second clamping assembly 901 is installed on the outer wall of the other side of the fixed bracket 1. The first clamping assembly 9 and the second clamping assembly 901 both include a guide rail 902, and a threaded rod 903 is provided inside the guide rail 902. A driving motor 904 is connected to the outer wall of one side of the threaded rod 903, and a guide block 905 is screwed to the outer wall of the middle part of the threaded rod 903. The guide block 905 is welded with a first clamping plate 906, and a second clamping plate 907 is welded to the bottom of the guide rail 902. The bottom of the guide rail 902 is fixed to the bottom of the rotating disk 908, and A rotating motor 909 is connected to the bottom center of the rotating disk 908, a storage component 10 is provided on one side of the first clamping component 9 and the second clamping component 901, and the storage component 10 includes a fixed plate 1005, the storage component 10 and the first clamping component 9 are located in the same straight line, and the storage component 10 and the first clamping component 9 are perpendicular to the fixed bracket 1, the first clamping plate 906 is located above the second clamping plate 907, and the first clamping plate 906 and the second clamping plate 907 are located in the same vertical plane, an anti-slip pad is bonded to the outer wall of the opposite side of the first clamping plate 906 and the second clamping plate 907, and a gap is provided between the bottom of the second clamping plate 907 and the top of the conveyor belt 3, and the gap distance is 0.5-1 cm.
[0030] The storage component 10 and the second clamping component 901 are located in the same straight line, and the storage component 10 and the second clamping component 901 are perpendicular to the fixed bracket 1, an infrared sensor 1006 is installed on the outer wall of one side of the top of the fixed plate 1005, and an electric telescopic rod 1007 is installed on the outer wall of the bottom of the fixed plate 1005, the storage component 10 includes a storage box 1001, and the inner walls on both sides of the storage box 1001 are fixed with fixed blocks 1002 distributed at equal distances, two symmetrically distributed plug rods 1003 are welded to the outer wall of the bottom of the storage box 1001, and the plug rods 1003 are plugged into the fixed plate 1005 with a slot 1004 on the top, the bottom of the electric telescopic rod 1007 is fixed on the base 1008, and a PLC controller 11 is installed on the outer wall of one side of the fixed bracket 1, and the signal end of the PLC controller 11 is connected to the drive motor 904, the rotating motor 909, the infrared sensor 1006 and the electric telescopic rod 1007 through a signal line.
[0031] When using the conveying mechanism, first connect the conveying mechanism to an external power source, and then place the parts to be conveyed above the conveyor belt 3. Due to the limiting effect of the arc guide rod 801, the parts will pass through the middle position in a concentrated manner, and then use the camera 803 to detect the parts to observe whether there are defects and whether they are qualified. When the parts are qualified, the PLC controller 11 will control the rotating motor 909 to drive the rotating disk 908 to rotate, and then the second clamping plate 907 will be inserted under the part, and then the PLC controller 11 will control the driving motor 904 to drive the first clamping plate 9026 to descend and clamp the parts. After clamping, the rotating motor 909 will rotate the parts to the front of the storage component 10, and when the infrared sensor 1006 detects that the parts are rotating, the PLC controller 11 will control the electric telescopic rod 1007 to descend, so that the parts can be successfully inserted into the fixed block 1002 for fixation.
[0032] For non-conforming parts based on Figures 1 to 7 The disclosed conveying mechanism performs conveying as follows.
[0033] The conveying mechanism of the computer production assembly line includes: a fixed bracket 1, a transparent glass cover is clamped on the top outer wall of the fixed bracket 1, and rectangular notches are arranged on both sides of the transparent glass cover, transmission rollers 2 are arranged on both ends of the inner wall of the fixed bracket 1, and a conveying belt 3 is arranged outside the transmission roller 2, supporting legs 4 distributed at equal distances are welded on the outer walls of both sides of the bottom of the fixed bracket 1, and sliding grooves 5 are opened on the outer walls of the opposite sides of the supporting legs 4, a sliding block 6 is embedded in the inner wall of the sliding groove 5, and the sliding block 6 is connected to a moving component 7, the inner wall size of the sliding groove 5 is adapted to the size of the sliding block 6, and the sliding groove 5 and the sliding block 6 form a sliding fit The inner wall of the sliding groove 5 is a T-shaped structure, and the sliding block 6 is a T-shaped structure. The moving component 7 includes a load-bearing rod 701, and a hydraulic rod 702 is fixed by bolts at the center position of the bottom of the load-bearing rod 701. A mounting plate is fixed by bolts at the bottom of the hydraulic rod 702, and guide wheels 703 are fixed at the four corners of the bottom of the mounting plate. A detection component 8 is installed at one end of the top of the fixed bracket 1, and the detection component 8 includes an arc guide rod 801 fixed on the fixed bracket 1. The camera 803 is externally connected to a computer through a wire, and the PLC controller 11 is connected to a switch through a wire, and the switch is connected to an external power supply.
[0034] A support frame 802 is welded to the top of the arc-shaped guide rod 801, and a camera 803 is fixed to the outer wall of the bottom of the support frame 802. A first clamping assembly 9 is installed on the outer wall of one side of the fixed bracket 1, and a second clamping assembly 901 is installed on the outer wall of the other side of the fixed bracket 1. The first clamping assembly 9 and the second clamping assembly 901 both include a guide rail 902, and a threaded rod 903 is provided inside the guide rail 902. A driving motor 904 is connected to the outer wall of one side of the threaded rod 903, and a guide block 905 is screwed to the outer wall of the middle part of the threaded rod 903. The guide block 905 is welded with a first clamping plate 906, and the guide A second clamping plate 907 is welded to the bottom of the guide rail 902, the bottom of the guide rail 902 is fixed to the bottom of the rotating disk 908, and a rotating motor 909 is connected to the center of the bottom of the rotating disk 908. A storage component 10 is provided on one side of the first clamping component 9 and the second clamping component 901, and the storage component 10 includes a fixed plate 1005. The storage component 10 and the first clamping component 9 are located in the same straight line, and the storage component 10 and the first clamping component 9 are perpendicular to the fixed bracket 1. The first clamping plate 906 is located above the second clamping plate 907, and the first clamping plate 906 and the second The clamping plates 907 are located in the same vertical plane, and an anti-skid pad is bonded to the outer wall on the opposite side of the first clamping plate 906 and the second clamping plate 907, and a gap is provided between the bottom of the second clamping plate 907 and the top of the conveyor belt 3, and the gap distance is 0.5-1 cm. The storage component 10 and the second clamping component 901 are located in the same straight line, and the storage component 10 and the second clamping component 901 are perpendicular to the fixed bracket 1. An infrared sensor 1006 is installed on the outer wall on one side of the top of the fixed plate 1005, and an electric telescopic rod 1007 is installed on the outer wall of the bottom of the fixed plate 1005. The storage component 10 includes a storage A storage box 1001 is provided, and the inner walls on both sides of the storage box 1001 are fixed with equidistantly distributed fixed blocks 1002, the bottom outer wall of the storage box 1001 is welded with two symmetrically distributed plug rods 1003, and the plug rods 1003 are plugged into a fixed plate 1005 with a slot 1004 on the top, the bottom of the electric telescopic rod 1007 is fixed on the base 1008, and a PLC controller 11 is installed on the outer wall of one side of the fixed bracket 1, and the signal end of the PLC controller 11 is connected to the drive motor 904, the rotating motor 909, the infrared sensor 1006 and the electric telescopic rod 1007 through a signal line.
[0035] When using the conveying mechanism, first connect the conveying mechanism to an external power source, then place the parts to be conveyed on the top of the conveying belt 3. Due to the limiting effect of the arc-shaped guide rod 801, the parts will pass through the middle position in a concentrated manner, and then use the camera 803 to detect the parts to see if there are any defects and whether they are qualified. When the parts are qualified, the parts will be clamped and taken out by the first clamping component 9, and the unqualified parts will continue to be transported, and when they are transported to the vicinity of the second clamping component 901, the PLC controller 11 will control the rotating motor 909 to drive The rotating disc 908 rotates, and then the second clamping plate 907 will be inserted under the part, and then the PLC controller 11 will control the driving motor 904 to drive the first clamping plate 9026 to descend and clamp the part. After clamping, the rotating motor 909 will rotate the part to the front of the storage component 10, and when the infrared sensor 1006 detects that the part is rotating, the PLC controller 11 will control the electric telescopic rod 1007 to descend, so that the part can be successfully inserted into the fixed block 1002 for fixation, thereby realizing the storage of unqualified parts.
[0036] In the conveying mechanism disclosed in the present application, by installing a detachable moving component on the supporting leg 4 at the bottom of the conveying mechanism, when the mechanism needs to be moved, it only needs to install the moving component, and then adjust the height of the hydraulic rod to lift the mechanism and complete the overall movement. The operation is simple and convenient, which can save a lot of physical strength and greatly improve the mobility of the mechanism. Secondly, by setting two groups of clamping components (i.e., the first clamping component 9 and the second clamping component 901) on both sides of the conveying mechanism, when the internal parts of the computer are transmitted to the belt, after passing the inspection of the inspection component, the first clamping component 9 can be used to clamp and remove the qualified parts in time, and the defective parts can be taken away by the second clamping component 901. In this way, the parts can be processed in batches, which can reduce the number of inspection personnel in the past, thereby reducing labor costs. Finally, after the clamping assembly has clamped the part, a rotating motor is used to rotate the part out of the conveyor belt, and the part is clamped inside the storage assembly 10, thereby clamping the part. During the clamping process, an infrared sensor 1006 is used to detect whether the part is conveyed again, and then the PLC controller is used to control the electric telescopic rod to continue to descend, so that the part can be completely inserted into the storage assembly 10.
[0037] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.
[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.
[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. The conveying mechanism of the computer production assembly line is characterized by: include: The fixing bracket has transmission rollers at both ends of the inner wall of the fixing bracket, and a conveying belt is arranged outside the transmission roller, supporting legs distributed at equal distances are welded on the outer walls on both sides of the bottom of the fixing bracket, and sliding grooves are opened on the outer walls on the opposite sides of the supporting legs, a sliding block is embedded in the inner wall of the sliding groove, and the sliding block is connected with a moving component, a detection component is installed at one end of the top of the fixing bracket, and the detection component includes an arc-shaped guide rod fixed on the fixing bracket, a support frame is welded on the top of the arc-shaped guide rod, and a camera is fixed on the outer wall of the bottom of the support frame, a first clamping component is installed on the outer wall of one side of the fixing bracket, and a second clamping component is installed on the outer wall of the other side of the fixing bracket, the first clamping component and the second clamping component both include a guide rail, and a threaded rod is arranged inside the guide rail, a driving motor is connected to the outer wall of one side of the threaded rod, and a guide block is screwed on the outer wall in the middle of the threaded rod.
2. The conveying mechanism according to claim 1, characterized in that: The guide block is welded with a first clamping plate, and the bottom of the guide rail is welded with a second clamping plate, the bottom of the guide rail is fixed to the bottom of the rotating disk, and a rotating motor is connected to the center of the bottom of the rotating disk, one side of the first clamping assembly and the second clamping assembly are both provided with a storage assembly, and the storage assembly includes a fixed plate, an infrared sensor is installed on the outer wall of one side of the top of the fixed plate, and an electric telescopic rod is installed on the outer wall of the bottom of the fixed plate, and the bottom of the electric telescopic rod is fixed on the base.
3. The conveying mechanism according to claim 2, characterized in that: A PLC controller is installed on the outer wall of one side of the fixed bracket, and a signal end of the PLC controller is connected with a driving motor, a rotating motor, an infrared sensor and an electric telescopic rod through a signal line.
4. The conveying mechanism according to claim 3, characterized in that: The inner wall size of the sliding groove is matched with the size of the sliding block, and the sliding groove and the sliding block form a sliding fit. The inner wall of the sliding groove is a T-shaped structure, and the sliding block is a T-shaped structure.
5. The conveying mechanism according to claim 3, characterized in that: The moving assembly comprises a load-bearing rod, and a hydraulic rod is fixed at the center position of the bottom of the load-bearing rod by bolts, a mounting plate is fixed at the bottom of the hydraulic rod by bolts, and guide wheels are fixed at the four corners of the bottom of the mounting plate.
6. The conveying mechanism according to claim 3, characterized in that: The storage assembly comprises a storage box, and the inner walls on both sides of the storage box are fixed with fixed blocks distributed at equal distances, the outer wall at the bottom of the storage box is welded with two symmetrically distributed plug rods, and the plug rods are plugged into a fixed plate with a slot on the top.
7. The conveying mechanism according to claim 3, characterized in that: The camera is externally connected to a computer via a wire, and the PLC controller is connected to a switch via a wire, and the switch is connected to an external power source.
8. The conveying mechanism according to claim 3, characterized in that: A transparent glass cover is clamped on the outer wall of the top of the fixing bracket, and rectangular notches are arranged on both sides of the transparent glass cover.
9. The conveying mechanism according to claim 3, characterized in that: The storage component and the first clamping component are located in the same straight line, and the storage component and the first clamping component are perpendicular to the fixed bracket. The storage component and the second clamping component are located in the same straight line, and the storage component and the second clamping component are perpendicular to the fixed bracket.
10. The conveying mechanism according to claim 3, characterized in that: The first clamping plate is located above the second clamping plate, and the first clamping plate and the second clamping plate are located in the same vertical plane. Anti-slip pads are bonded to the outer walls on the opposite side of the first clamping plate and the second clamping plate, and a gap is provided between the bottom of the second clamping plate and the top of the conveyor belt.