Carrying system for processing upper shell of gas meter

Abstract

The utility model discloses a carrying system for gas meter upper shell processing, which comprises a conveying belt arranged along a processing station and a hanging frame used for placing a gas meter upper shell, the hanging frame can be hung on the conveying belt, the processing station at least comprises an automatic feeding station, and an automatic feeding mechanical arm is arranged corresponding to the automatic feeding station. The automatic feeding mechanical arm is used for placing the gas meter upper shells on the hanging frame in batches, and the hanging frame closing device is used for preventing the hanging frame from shaking in the automatic feeding process. By the adoption of the scheme, the hanging frame closing device is mainly arranged, meanwhile, the structure of the hanging frame is optimized, and therefore the stability of shell batch hanging, transporting and follow-up machining processes is improved, and the production efficiency and the product quality can be improved easily.

Description

Technical Field

[0001] The utility model belongs to the field of gas meter production equipment, and in particular relates to a carrying system for processing the upper shell of a gas meter. Background Art

[0002] Gas meters are widely used in daily life and manufacturing industries to accumulate natural gas usage. Their installation environments are different, requiring anti-corrosion treatment on the surface of the meter case. The most common treatment is plastic spraying. In this process, the meter case needs to be cleaned first, and then the paint is sprayed onto the surface of the workpiece under the action of an electric field to form a powdery coating, which is then subjected to high-temperature baking and other treatments to form a protective coating.

[0003] During the processing, special hangers are required to hang the meter cases and transfer them to different workstations through conveyor lines. In the prior art, such as the patent number "201920500655.3", named "A processing line for a gas meter case", and the patent number "201920477218.4", named "A hook for spraying plastic on the upper shell of a gas meter case", the applicant found in the research that in the actual production process, the hangers used still have poor stability and large shaking amplitude, especially when placing meter cases in batches, the shaking is greater, which can easily cause resonance and lead to decoupling, which is completely unsuitable for the automated operation of the robotic arm, seriously affecting production efficiency. Utility Model Content

[0004] In view of this, the utility model provides a transport system for gas meter upper shell processing to solve the problem in the prior art that the material loading in the gas meter upper shell processing is unstable, which affects the production and processing efficiency.

[0005] The technical solution is as follows:

[0006] A transport system for processing gas meter upper shells, comprising a conveyor belt arranged along a processing station, and a hanger for placing the gas meter upper shells, wherein the hanger can be suspended on the conveyor belt, and the key lies in that: the processing station at least comprises an automatic loading station, and an automatic loading robot arm and a hanger accommodating device are arranged corresponding to the automatic loading station, wherein the automatic loading robot arm is used to place the gas meter upper shells in batches on the hanger, and the hanger accommodating device is used to prevent the hanger from shaking during the automatic loading process.

[0007] The above scheme is mainly adopted, which mainly uses the hanger catering device in conjunction with the automatic feeding robot arm to avoid the shaking of the hanger during automatic batch feeding, ensure the stability and position accuracy of the watch case, ensure the reliability of the feeding process while ensuring the feeding speed, and is conducive to improving production efficiency.

[0008] Preferably, the rack accommodating device comprises a rack clamping mechanism, the rack clamping mechanism comprises two racks arranged opposite to each other, at least one of the racks is provided with a push-pull device, the push-pull device is used to push and pull the corresponding rack to approach or move away from the other rack, and the conveyor belt is located directly above the two racks;

[0009] The frame is provided with a synchronous belt and a servo motor for driving the synchronous belt to operate. The operating plane of the synchronous belt is parallel to the conveying direction of the conveyor belt. The synchronous belts on the two frames are arranged opposite to each other, and the opposite parts of the synchronous belts on the two frames are straight sections. With the above scheme, when the hanger is conveyed by the conveyor belt, the synchronous belt on the frame is used to flexibly clamp and convey the hanger. At this time, the automatic loading robot arm is used for automatic loading. On the one hand, it meets the demand for fast loading. Because it is clamped, there will be no significant shaking during the loading process. On the other hand, there is no need for the hanger to completely stop and wait, which is conducive to ensuring production efficiency.

[0010] As a preferred embodiment, the same frame has two synchronous belts arranged opposite to each other, and the synchronous belts on the same frame are driven by the same servo motor. By adopting the above solution, the contact points are increased, and the height and direction stability of the hanger can be fully improved.

[0011] Preferably, the rack engaging device further comprises a buffer mechanism located below the rack clamping mechanism, the buffer mechanism comprising a bottom plate, a guide seat slidably arranged on the bottom plate, and a buffer cylinder for driving the guide seat to slide horizontally;

[0012] The guide seat is provided with at least two movable roller mounting frames, and the roller mounting frames are provided with rollers mounted in a rotatable manner, and the rotation direction of the rollers is parallel to the running plane of the synchronous belt, and when the bracket clamping mechanism clamps the upper part of the bracket, the rollers fit with the lower part of the bracket. The above scheme is adopted, and the buffer mechanism is used to cooperate with the upper bracket clamping mechanism, and the buffer mechanism is located on the side opposite to the automatic feeding robot arm to offset the inertia force of the robot arm when feeding, so as to ensure the stability of the lower part of the bracket.

[0013] As a preferred embodiment, the bottom of the guide seat is slidably matched with the bottom plate, the roller mounting frame is supported on the guide seat by at least two guide rods, the guide rods are slidably matched with the guide seat, and a buffer spring is sleeved on the guide rod, and the buffer spring is located between the roller mounting frame and the guide seat. The above scheme is adopted to make the roller have a better degree of freedom of movement, avoid hard contact with the hanging frame, and improve the reliability of the catering mechanism.

[0014] Preferably, the rack-meeting device comprises a stand, the stand comprises a column and a suspension beam, an adjustment seat is slidably provided on the column, and the buffer mechanism is fixed on the adjustment seat;

[0015] The two racks are respectively arranged on the upper part of the column and the suspension beam, and the push-pull device is fixed on the column. The above scheme is adopted to facilitate the adjustment of the height of the buffer mechanism according to the needs and adapt to the hangers of different specifications.

[0016] Preferably, the rack comprises a plurality of horizontal hanging rods distributed in a vertical array, and at least two vertical connecting rods arranged vertically, and the vertical connecting rods are fixed to all the horizontal hanging rods at the same time;

[0017] The uppermost horizontal hanging rod is provided with two oblique connecting rods distributed in a triangle therewith, and the vertices of the two oblique connecting rods are connected with extension rods, and the top of the extension rods is provided with a suspension joint matching the conveyor belt;

[0018] The horizontal hanging rod has hook components evenly distributed along its length, and each group of the hook components includes at least two hooks arranged in parallel. The above scheme can meet the needs of batch shell mounting, and the overall structure has good stability, and is easy to cooperate with the bracket structure to improve the transportation stability.

[0019] Preferably, the hook is connected to the horizontal hanging rod through a support rod, the support rod is horizontally arranged and perpendicular to the horizontal hanging rod, and its extension direction is opposite to that of the hook;

[0020] The hook comprises an integrally formed downwardly inclined portion, a horizontal portion and an upwardly inclined portion, wherein the upper end of the downwardly inclined portion is connected to the end of the support rod, and the lower end thereof extends obliquely toward the side where the horizontal hanging rod is located, the horizontal portion and the horizontal hanging rod are perpendicular to each other, and the upwardly inclined portion extends obliquely upwardly from the end of the horizontal portion, and the angle between the upwardly inclined portion and the horizontal portion is 35°-45°;

[0021] In the same hook assembly, the horizontal portion of at least one hook has a bifurcated portion, the bifurcated portion is perpendicular to the horizontal portion and extends obliquely toward the space between the two hooks, and its apex is lower than the apex of the upward inclined portion;

[0022] In the same hook assembly, the vertical distance between the vertices of the upward inclined parts of the two hooks is adapted to the distance between the two vertices in the width direction of the upper shell of the gas meter. With the above solution, the fork part can greatly improve the stability of the support for the upper shell of the gas meter and reduce the shaking amplitude.

[0023] As a preferred embodiment, the apex of the bifurcation is located on the middle vertical plane of the two hooks in the same group, the horizontal vertical distance between the apex of the bifurcation and the apex of the upward inclined portion is 1 / 2 to 2 / 3 of the depth of the upper shell of the gas meter, and the apex of the upward inclined portion and the bifurcation are both cone-shaped. The above solution can ensure that the inclination angle of the upper shell is in a relatively appropriate position, further improving the stability of the transport and cleaning spraying process.

[0024] As a preferred embodiment, the processing station also includes a manual loading station and a replenishing station arranged along the conveyor belt, and the manual loading station and the replenishing station are respectively located upstream and downstream of the automatic loading station. The above scheme is adopted to avoid the situation where the robot arm fails to load the material, and meet the working conditions of full manual loading and replenishing the leaked material.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] The transport system for gas meter upper shell processing provided by the utility model mainly provides a hanger accommodating device and optimizes the hanger structure, thereby improving the stability of the shell batch mounting and transportation and subsequent processing processes, which is beneficial to improving production efficiency and processed product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the utility model;

[0028] Figure 2 It is a schematic diagram of the structure of the rack catering device;

[0029] Figure 3 for Figure 2 Side view;

[0030] Figure 4 It is a schematic diagram of the buffer mechanism structure;

[0031] Figure 5 Schematic diagram of the rack structure;

[0032] Figure 6 for Figure 5 The partial enlarged picture of point Ⅰ in the middle;

[0033] Figure 7 for Figure 5 Side view;

[0034] Figure 8 for Figure 7 The partial enlarged view of the middle II;

[0035] Fig. 9 A three-dimensional diagram of the hook assembly. DETAILED DESCRIPTION

[0036] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0037] refer to Figures 1 to 9The transport system shown for gas meter upper shell processing mainly includes a conveyor belt 100 arranged along the processing station and a hanger 200 for placing the gas meter upper shell. The hanger 200 can be suspended on the conveyor belt 100 and moved to subsequent different processing stations through the conveyor belt 100. In the present application, the processing station includes at least an automatic loading station A, and an automatic loading robot arm 300 and a hanger catering device 400 are arranged corresponding to the automatic loading station A. The automatic loading robot arm 300 is a multi-suction cup robot arm commonly used in industry, which is mainly used to place the gas meter upper shells in batches on the hanger 200, and the hanger catering device 400 is used to prevent the hanger 200 from shaking during the automatic loading process.

[0038] The processing stations also include a manual loading station B and a refilling station C arranged along the conveyor belt 100. The manual loading station B and the refilling station C are respectively located upstream and downstream of the automatic loading station A. When the automatic loading robot arm 300 stops, full manual loading operations can be performed at the manual loading station B. When material leakage occurs during the loading of the automatic loading robot arm 300, material refilling can be performed manually at the refilling station C.

[0039] In the present application, the rack accommodating device 400 mainly includes a rack clamping mechanism 410. As shown in the figure, the rack clamping mechanism 410 includes two racks 411 arranged opposite to each other, at least one of the racks 411 is equipped with a push-pull device 413, and the push-pull device 413 is used to push and pull the corresponding rack 411 to make it closer to or away from the other rack 411. The conveyor belt 100 is located directly above the two racks 411.

[0040] The frame 411 has a synchronous belt 412 arranged along its length direction, and a servo motor 414 for driving the synchronous belt 412 to operate. The operating plane of the synchronous belt 412 is parallel to the conveying direction of the conveyor belt 100. The synchronous belts 412 on the two frames 411 are arranged opposite to each other, and the opposite parts of the synchronous belts 412 on the two frames 411 are straight sections.

[0041] In specific implementation, the frame 411 is generally in the shape of an I, and the same frame 411 has two upper and lower synchronous belts 412 arranged opposite to each other, and the synchronous belts 412 on the same frame 411 are driven by the same servo motor 414, which can fully ensure the synchronization of the speed of the synchronous belts 412.

[0042] The rack accommodating device 400 includes a frame 430, and the frame 430 includes a column 431 and a suspension beam 432. Two frames 411 are respectively arranged on the upper part of the column 431 and the suspension beam 432. The push-pull device 413 is fixed on the column 431. As shown in the figure, an L-shaped mounting seat 433 is fixed on the upper part of the column 431, and a connecting seat 415 is provided on the side of the corresponding frame 411. The connecting seat 415 and the bottom of the L-shaped mounting seat 433 are slidably matched through a guide rail. The push-pull device 413 is a clamping cylinder, which is fixed on the L-shaped mounting seat 433, and the end of its piston rod is connected to the connecting seat 415.

[0043] In the present application, the rack engaging device 400 also includes a buffer mechanism 420 located below the rack clamping mechanism 410, the buffer mechanism 420 includes a base plate 421, a guide seat 422 slidably arranged on the base plate 421, and a buffer cylinder 423 for driving the guide seat 422 to slide horizontally, and the sliding direction of the guide seat 422 is consistent with the moving direction of the frame 411.

[0044] As shown in the figure, the base plate 421 and the guide seat 422 are both generally in a "T" shape. The guide seat 422 has at least two movably arranged roller mounting frames 424, and the roller mounting frames 424 have rollers 425 mounted in a rotatable manner. The rotation direction of the rollers 425 is parallel to the operating plane of the synchronous belt 412. When the bracket clamping mechanism 410 clamps the upper part of the bracket 200, the rollers 425 fit with the lower part of the bracket 200.

[0045] Specifically, the bottom of the guide seat 422 is slidably matched with the base plate 421, and the roller mounting frame 424 is supported on the guide seat 422 by at least two guide rods 426. The guide rod 426 is slidably matched with the guide seat 422, and is usually installed in conjunction with a guide bearing, and a buffer spring 427 is sleeved on the guide rod 426, and the buffer spring 427 is located between the roller mounting frame 424 and the guide seat 422.

[0046] In this embodiment, an adjustment seat 440 is slidably provided on the column 431, and the buffer mechanism 420 is fixed on the adjustment seat 440. The adjustment seat 440 is sleeved on the column 431 and can slide up and down along the column 431 to adjust the height position and is fixed by a locking screw. In addition, strip holes and bolts are used between the base plate 421 and the adjustment seat 440 to more flexibly adjust the height position of the buffer mechanism 420.

[0047] Key References Figures 5 to 9 The rack 200 in the present application can be suitable for batch mounting by manual and robotic arms, and includes a plurality of horizontal hanging rods 210 distributed in a vertical array, and at least two vertically arranged vertical connecting rods 220, and the vertical connecting rods 220 are fixed to all the horizontal hanging rods 210 at the same time.

[0048] The uppermost horizontal hanging rod 210 has two oblique connecting rods 230 distributed in a triangle therewith, and the vertices of the two oblique connecting rods 230 are connected to extension rods 240, and the tops of the extension rods 240 have hanging joints 241 matching the conveyor belt 100. In this embodiment, there are only two vertical connecting rods 220, and the two vertical connecting rods 220 are symmetrically arranged relative to the extension rods 240 and are respectively close to the ends of the horizontal hanging rod 210.

[0049] The cross-hanging rod 210 has hook components evenly distributed along its length, and each set of hook components includes at least two parallel hooks 250. As shown in the figure, the hook 250 is connected to the cross-hanging rod 210 through a support rod 260, and the support rod 260 is horizontally arranged and perpendicular to the cross-hanging rod 210, and its extension direction is opposite to the extension direction of the hook 250.

[0050] The hook 250 includes an integrally formed downwardly inclined portion 251, a horizontal portion 252 and an upwardly inclined portion 253, wherein the upper end of the downwardly inclined portion 251 is connected to the end of the support rod 260, and the lower end thereof extends obliquely toward the side where the cross-hanging rod 210 is located, and the angle α between the downwardly inclined portion 251 and the horizontal portion is approximately 45°-85°, and 80° is preferably selected in this embodiment. The horizontal portion 252 is perpendicular to the cross-hanging rod 210, and the upwardly inclined portion 253 extends obliquely upward from the end of the horizontal portion 252, and the angle β between it and the horizontal portion 252 is approximately 35°-45°, and 40° is preferably selected in this embodiment. In this way, the hook 250 has better supporting capacity and lateral anti-deformation capacity, which is beneficial to extending its service life.

[0051] In the same hook assembly, the horizontal portion 252 on at least one of the hooks 250 has a forked portion 254. As shown in the figure, the forked portion 254 is perpendicular to the horizontal portion 252 and extends obliquely toward the space between the two hooks 250. Its apex is lower than the apex of the inclined portion 253. In this way, when the upper shell of the gas meter is placed on the hook assembly, it is actually supported at three points and is in an inclined posture with the opening facing downward, which is conducive to cleaning and spraying operations.

[0052] In the same hook assembly, the vertical distance between the vertices of the inclined portions 253 of the two hooks 250 is adapted to the distance between the two vertices in the width direction of the gas meter upper shell. In this way, when supporting, the vertices of the inclined portions 253 are close to the top angle of the gas meter upper shell, which is beneficial to further improve the stability of the gas meter upper shell.

[0053] In a specific implementation, the apex of the forked portion 254 is located on the middle vertical plane of the two hooks 250 in the same group. Figure 8As shown, the horizontal vertical distance L between the apex of the fork portion 254 and the apex of the inclined portion 253 is 1 / 2 to 2 / 3 of the depth of the upper shell of the gas meter. This is close to the center of gravity of the upper shell of the gas meter and can achieve better supporting stability. In addition, the apex of the inclined portion 253 and the fork portion 254 are both conical.

[0054] refer to Figures 1 to 9 The carrier system for gas meter upper shell processing shown in the figure, after being installed according to the specifications of the bracket 200, the bracket clamping mechanism 410 is opposite to the position of the oblique connecting rod 230, that is, the height of the frame 411 is within the range of the oblique connecting rod 230, and the buffer mechanism 420 is opposite to the position of the lowest horizontal hanging rod 210, that is, when the buffer mechanism 420 is working, the roller 425 must be able to contact the lowest horizontal hanging rod 210 and be located directly below the clamping position of the two frames 411.

[0055] When the rack 200 follows the conveyor belt 100 to move into the automatic loading station A, the servo motor 414 starts, the running speed of the synchronous belt 412 is consistent with the speed of the conveyor belt 100, and the pusher 413 works to push the corresponding frame 411 to another frame, so that the synchronous belt 412 contacts the oblique connecting rod 230 to achieve flexible clamping. At the same time, the buffer cylinder 423 works to push the guide seat 422 out, and the roller 425 contacts the opposite horizontal hanging rod 210 to achieve flexible tightening. The automatic loading robot arm 300 places the upper shells of the gas meters on the rack 200 in batches according to the control in the follow-up state. Because the rack 200 has excellent stability, it can avoid shaking during batch placement to the greatest extent, fully ensure the posture stability and consistency of the upper shell, which is beneficial to improving production efficiency and product processing quality.

[0056] It should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the protection scope of the present invention.

Claims

1. A transport system for processing a gas meter upper shell, comprising a conveyor belt (100) arranged along a processing station, and a hanger (200) for placing the gas meter upper shell, wherein the hanger (200) can be suspended on the conveyor belt (100), characterized in that: The processing station at least comprises an automatic loading station (A), and an automatic loading robot arm (300) and a rack engaging device (400) are provided corresponding to the automatic loading station (A), wherein the automatic loading robot arm (300) is used to place the gas meter upper shells in batches on the rack (200), and the rack engaging device (400) is used to prevent the rack (200) from shaking during the automatic loading process.

2. The transport system for gas meter upper shell processing according to claim 1, characterized in that: The rack accommodating device (400) comprises a rack clamping mechanism (410), wherein the rack clamping mechanism (410) comprises two racks (411) arranged opposite to each other, wherein at least one rack (411) is provided with a pusher (413), wherein the pusher (413) is used to push or pull the corresponding rack (411) to move closer to or away from the other rack (411), and the conveyor belt (100) is located directly above between the two racks (411); The frame (411) is provided with a synchronous belt (412) and a servo motor (414) for driving the synchronous belt (412) to operate; the operating plane of the synchronous belt (412) is parallel to the conveying direction of the conveyor belt (100); the synchronous belts (412) on the two frames (411) are arranged opposite to each other; and the opposite parts of the synchronous belts (412) on the two frames (411) are straight sections.

3. The transport system for gas meter upper shell processing according to claim 2, characterized in that: The same frame (411) is provided with two synchronous belts (412) arranged opposite to each other in an upper and lower direction, and the synchronous belts (412) on the same frame (411) are driven by the same servo motor (414).

4. The transport system for gas meter upper shell processing according to claim 2 or 3, characterized in that: The rack accommodating device (400) further comprises a buffer mechanism (420) located below the rack clamping mechanism (410), the buffer mechanism (420) comprising a bottom plate (421), a guide seat (422) slidably disposed on the bottom plate (421), and a buffer cylinder (423) for driving the guide seat (422) to slide horizontally; The guide seat (422) is provided with at least two movably arranged roller mounting frames (424), and the roller mounting frames (424) are provided with rollers (425) mounted in a rotatable manner, and the rotation direction of the rollers (425) is parallel to the running plane of the synchronous belt (412), and when the hanger clamping mechanism (410) clamps the upper part of the hanger (200), the rollers (425) are in contact with the lower part of the hanger (200).

5. The transport system for gas meter upper shell processing according to claim 4, characterized in that: The bottom of the guide seat (422) is slidably matched with the bottom plate (421), and the roller mounting frame (424) is supported on the guide seat (422) through at least two guide rods (426). The guide rods (426) are slidably matched with the guide seat (422), and a buffer spring (427) is sleeved on the guide rod (426), and the buffer spring (427) is located between the roller mounting frame (424) and the guide seat (422).

6. The transport system for gas meter upper shell processing according to claim 4, characterized in that: The rack accommodating device (400) comprises a stand (430), the stand (430) comprises a column (431) and a suspension beam (432), an adjustment seat (440) is slidably arranged on the column (431), and the buffer mechanism (420) is fixedly arranged on the adjustment seat (440); The two frames (411) are respectively arranged on the upper part of the column (431) and the suspension beam (432), and the push-pull device (413) is fixed on the column (431).

7. The transport system for gas meter upper shell processing according to any one of claims 1 to 3, characterized in that: The hanger (200) comprises a plurality of horizontal hanging rods (210) distributed in a vertical array, and at least two vertical connecting rods (220) arranged vertically, wherein the vertical connecting rods (220) are fixed to all the horizontal hanging rods (210) at the same time; The uppermost horizontal hanging rod (210) is provided with two oblique connecting rods (230) distributed in a triangle therewith, the vertices of the two oblique connecting rods (230) are connected with extension rods (240), and the top of the extension rod (240) is provided with a suspension joint (241) matching the conveyor belt (100); The horizontal hanging rod (210) has hook components evenly distributed along its length direction, and each group of the hook components includes at least two hooks (250) arranged in parallel.

8. The transport system for gas meter upper shell processing according to claim 7, characterized in that: The hook (250) is connected to the cross-hanging rod (210) via a support rod (260); the support rod (260) is arranged horizontally and is perpendicular to the cross-hanging rod (210); and its extension direction is opposite to that of the hook (250); The hook (250) comprises an integrally formed downwardly inclined portion (251), a horizontal portion (252) and an upwardly inclined portion (253), wherein the upper end of the downwardly inclined portion (251) is connected to the end of the support rod (260), and the lower end thereof extends obliquely toward the side where the cross-hanging rod (210) is located, the horizontal portion (252) and the cross-hanging rod (210) are perpendicular to each other, and the upwardly inclined portion (253) extends obliquely upwardly from the end of the horizontal portion (252), and the angle between the upwardly inclined portion (253) and the horizontal portion (252) is 35°-45°; In the same hook assembly, the horizontal portion (252) on at least one of the hooks (250) has a bifurcated portion (254), the bifurcated portion (254) is perpendicular to the horizontal portion (252) and extends obliquely toward the space between the two hooks (250), and its apex is lower than the apex of the upward inclined portion (253); In the same hook assembly, the vertical distance between the vertices of the upwardly inclined parts (253) of the two hooks (250) is adapted to the distance between the two vertices in the width direction of the upper shell of the gas meter.

9. The transport system for gas meter upper shell processing according to claim 8, characterized in that: The apex of the bifurcated portion (254) is located on the middle vertical plane of the two hooks (250) in the same group, and the horizontal vertical distance between the apex of the bifurcated portion (254) and the apex of the upward inclined portion (253) is 1 / 2 to 2 / 3 of the depth of the upper shell of the gas meter. The apex of the upward inclined portion (253) and the bifurcated portion (254) are both cone-shaped.

10. The transport system for gas meter upper shell processing according to any one of claims 1 to 3, characterized in that: The processing station also includes a manual loading station (B) and a material replenishing station (C) arranged along the conveyor belt (100), and the manual loading station (B) and the material replenishing station (C) are respectively located upstream and downstream of the automatic loading station (A).

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