Automatic sub-packaging and weighing apparatus

Abstract

This utility model discloses an automatic dispensing and weighing device, including a cup circulation device that can drive a cup to move back and forth. Sequentially arranged along the cup's movement direction are: a quantitative dispensing device for injecting a specified volume of medicine into the cup; a re-weighing device for weighing the cup containing the medicine; and a defective product return device that picks up cups that fail to meet the weight limit and pours the medicine back into the quantitative dispensing device. The beneficial effects of this utility model are: by re-weighing the cups containing medicine through the re-weighing device, if the re-weighing device detects a defective product, the defective product return device can pour the medicine back into the quantitative dispensing device. The overall dispensing efficiency of the equipment is high, improving the reliability and accuracy of dispensing while reducing medicine waste.

Description

Technical Field

[0001] This utility model relates to the technical field of small-dose drug weighing equipment, and in particular to an automatic dispensing and weighing device. Background Technology

[0002] In many industries, such as pharmaceuticals, food, chemicals, logistics, and agriculture, there is a need for rapid and accurate weighing of granular and powdered materials. Because the amount weighed in a single transaction is small (generally no more than 10g), manual weighing is prone to error, leading to the following problems with traditional weighing methods: 1. Inefficient: It is time-consuming and labor-intensive, making it difficult to meet the needs of large-scale production.

[0003] 2. Unstable accuracy: It is easily affected by human factors (such as fatigue and visual errors), which leads to fluctuations in weighing results.

[0004] 3. Data management difficulties: Manual recording is prone to errors and makes it difficult to achieve real-time data traceability and analysis.

[0005] 4. High costs: In the long run, labor and management costs continue to rise.

[0006] For example, the applicant's partner filed a patent application on March 25, 2025, with the application number "CN202510357154.4" and the title "A Quantitative Dispensing Mechanism with Adjustable Volume". Although it achieved quantitative dispensing of drugs, it did not set up a re-weighing mechanism, making it impossible to screen out unqualified products in a timely manner or dispose of unqualified products in a timely manner. Utility Model Content

[0007] The purpose of this invention is to provide an automatic dispensing and weighing device that enables quantitative dispensing of drugs, re-weighs the containers filled with drugs, and returns any substandard products after re-weighing, thereby improving the accuracy of dispensing and reducing drug waste.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: An automatic dispensing and weighing device includes a cup circulation device that can drive the cup to move back and forth, and the following are arranged sequentially in the direction of the cup's movement: A quantitative dispensing device that injects a specified volume of medicine into a feeding cup; A re-weighing device for weighing the container into which the medicine is injected; The unqualified material cup is picked up and the medicine inside is poured back into the quantitative dispensing device.

[0009] Preferably, the weighing device includes a weighing device located below the material cup's moving path, and the bottom of the weighing device is provided with a telescopic rod that drives it to move up and down.

[0010] Preferably, the defective product return device includes a return guide rail, a moving part that reciprocates along the return guide rail, and a first rotary motor that drives the return guide rail to rotate. The moving part is equipped with a second rotary motor, and the second rotary motor is connected to a gripper device that can grip / release the material cup.

[0011] Preferably, the second rotary motor is provided with a rotating part, and the gripper device is a gripper cylinder provided on the rotating part, the gripper cylinder having a first gripper and a second gripper arranged symmetrically.

[0012] Preferably, the rotating part is further provided with a bottom-supporting cylinder, and the telescopic end of the bottom-supporting cylinder is connected to a cup support plate for supporting the cup.

[0013] Preferably, an anti-loosening spring is also provided between the first gripper and the second gripper.

[0014] Preferably, the gripper device further includes a detection unit for detecting the position of the cup.

[0015] Preferably, the second rotary motor is provided with a buffer part that buffers the rotation process of the rotating part.

[0016] Preferably, the material cup circulation device includes a first conveying part and a second conveying part for conveying material cups, the first conveying part being connected to a first transverse pushing part for pushing the material cups thereon to move, and the second conveying part being connected to a second transverse pushing part for pushing the material cups thereon to move. The cup circulation device further includes a first vertical pusher section for conveying the cup from the end of the second conveyor section to the beginning of the first conveyor section, and a second vertical pusher section for conveying the cup from the end of the first conveyor section to the beginning of the second conveyor section.

[0017] Preferably, the material cup circulation device, the quantitative dispensing device, the reweighing device, and the defective product return device are all mounted on the overall frame, and the outer side of the overall frame is provided with a protective shell.

[0018] The beneficial effects of this utility model are as follows: 1. The re-weighing device re-weighs the cups containing the medicine. If the re-weighing device detects a defective product, the defective product return device can return the medicine in it to the quantitative dispensing device. The overall dispensing efficiency of the equipment is high, which improves the reliability and accuracy of dispensing and reduces the waste of medicine.

[0019] 2. The moving part in the non-conforming product return device can move up and down along the return guide rail, making it convenient to remove the material cup from the material cup circulation device or put it back into the material cup circulation device; the second rotary motor can drive the gripper device to rotate, making it convenient to tilt the material cup it is gripped and take out the material inside.

[0020] 3. A bottom-supporting cylinder is also provided on the rotating part, which can lift the material cup through the material cup support plate to prevent the material cup from falling accidentally; an anti-loosening spring is also provided between the two grippers to make the clamping process of the material cup stable and reliable.

[0021] 4. A detection unit is provided to detect the position of the material cup and ensure that the material cup is always in place; a buffer unit is provided on the second rotary motor to ensure smooth rotation and avoid accidental bumps.

[0022] 5. The material cup circulation device can drive the material cups to circulate back and forth. It can buffer multiple material cups, making it easy to remove the material from the qualified material cups and put the empty cups back, thus improving the dispensing efficiency of the equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the device; Figure 2 This is a schematic diagram of the structure of the device inside the protective casing; Figure 3 for Figure 2 The diagram shows the structure of the upper panel, the material cup circulation device, and the quantitative dispensing device. Figure 4 This is a schematic diagram of the quantitative drug dispensing device; Figure 5 This is a schematic diagram of the weighing device; Figure 6 This is a schematic diagram of the material cup circulation device. Figure 7 This is a schematic diagram of the non-conforming product return device (clamping cup); Figure 8 This is a schematic diagram of the non-conforming product return device (without clamping the material cup) from another angle. Figure 9 for Figure 8 A magnified view of a portion of the image.

[0024] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0025] The present invention will now be further described with reference to the accompanying drawings. Example

[0026] like Figure 2 and Figure 3As shown, the automatic dispensing and weighing device described in this embodiment includes a material cup circulation device 40 that can drive the material cup to move back and forth. The following components are sequentially arranged in the direction of material cup movement: A quantitative dispensing device 20 for injecting a specified volume of medicine into a feeding cup; A re-weighing device 50 for weighing the injection cup; The unqualified material cup is picked up and the medicine inside is poured back into the unqualified product return device 30 of the quantitative dispensing device 20.

[0027] like Figure 1 and Figure 2 As shown, the aforementioned cup circulation device 40, quantitative dispensing device 20, reweighing device 50 and non-conforming product return device 30 are all installed on the upper panel 11 of the overall frame 10, and a protective shell 60 is provided on the outside of the overall frame 10.

[0028] The protective shell 60 can be made of transparent acrylic sheet and has a protective door that can be opened / closed. A safety access control switch, magnetic door catch, or other similar structure can be installed at the protective door for easy operation. All of the above structures are existing conventional technologies and will not be described in detail in this embodiment.

[0029] like Figure 6 As shown, the cup circulation device 40 includes a first conveying section 46 and a second conveying section 47 for conveying cups 41. The arrow at the top of the figure indicates the conveying direction of the first conveying section 46, and the arrow at the bottom indicates the conveying direction of the second conveying section 47. The first conveying section 46 is connected to a first transverse pushing section 42 that pushes the cups 41 on it to move. The second conveying section 47 is connected to a second transverse pushing section 43 that pushes the cups 41 on it to move. Both the first transverse pushing section 42 and the second transverse pushing section 43 can use telescopic cylinders. When extended, the cups 41 placed on the first conveying section 46 / second conveying section 47 move forward one position as a whole. After that, the telescopic cylinder retracts to allow for the next push.

[0030] In this embodiment, the first conveying section 46 is provided with two rows of parallel material cups 41, 11 in each row, for a total of 22 cups; the second conveying section 47 is provided with a single row of parallel material cups 41, for a total of 11 cups, so that the material cup circulation device 40 can buffer 33 material cups. The quantitative dispensing device 20 and the defective product return device 30 are located above the second conveying section 47, and the reweighing device 50 is located below the second conveying section 47, and the positions of the quantitative dispensing device 20 and the reweighing device 50 correspond to each other (that is, the reweighing device 50 is located directly below the quantitative dispensing device 20).

[0031] The cup circulation device 40 also includes a first vertical pusher 44 that conveys the cup 41 from the end of the second conveyor 47 to the beginning of the first conveyor 46 and a second vertical pusher 45 that conveys the cup 41 from the end of the first conveyor 46 to the beginning of the second conveyor 47, thereby realizing the cyclic movement of the cup 41.

[0032] In this embodiment, the material cup 41 completes quantitative feeding and re-weighing on the second conveying section 47. The material cup 41 that fails the re-weighing is removed by the defective product return device 30, and the material in it is poured back into the quantitative dispensing device 20. Then, the defective product return device 30 continues to place the material cup 41 on the second conveying section 47 and is transported to the first conveying section 46. Material cups 41 loaded with material and empty material cups 41 (emptied due to defects) on the second conveyor section 47 are sequentially conveyed to the end. Then, the first vertical pusher section 44 operates, first conveying them to the first row on the first conveyor section 46, and then conveying the subsequent material cups 41 to the second row on the first conveyor section 46. Then, the first horizontal pusher section 42 operates, causing the first conveyor section 46 to send away the material cups 41. After the material cups 41 on the first conveyor section 46 are conveyed to the end, the second vertical pusher section 45 first conveys the material cups 41 in the second row to the second conveyor section 47, and then conveys the material cups 41 in the first row to the second conveyor section 47, thereby realizing the cyclical movement of the material cups 41.

[0033] The first vertical pushing section 44 and the second vertical pushing section 45 can also be configured as telescopic cylinders. During extension, the material cup 41 is transferred from the first conveying section 46 to the second conveying section 47, or vice versa. Afterward, the telescopic cylinder retracts to allow for the next extension and transfer. In this embodiment, two rows of material cups 41 are arranged on the first conveying section 46, while only one row is arranged on the second conveying section 47. This results in inconsistent extension distances between adjacent extensions of the first vertical pushing section 44 and the second vertical pushing section 45 (one is longer, the next shorter, and they alternate). To ensure precise operation, this embodiment installs detection devices on both the first vertical pushing section 44 and the second vertical pushing section 45 to ensure that the material cup 41 is moved to the designated position each time it extends. Alternatively, the movement distance can be controlled by a program to ensure compliance with requirements. The aforementioned detection devices or control programs are existing conventional technologies and will not be described in detail in this embodiment.

[0034] In this embodiment, a protective door is provided on the protective housing 60. When the equipment is running, the empty cups 41 are first placed on the cup circulation device 40, and then the protective door is closed and the equipment is started. After the equipment has been running for a period of time, when the cups 41 on the first conveyor section 46 are basically filled with the required weight of material (there may be a small number of empty cups, which may be due to being emptied because they are not qualified; or the door was opened too early and some cups are not yet full), the protective door is opened, and the workers take out the cups 41 and put in empty cups again. The opening interval of the protective door can be determined based on work experience; the cup circulation device 40 can buffer multiple cups, which can minimize the frequency of door opening and reduce the impact on the normal production process.

[0035] like Figure 4 As shown, the quantitative dispensing device 20 includes a feeding hopper 23, a first cylinder 21, and a second cylinder 22. A magnetic rod 24 is also provided in the feeding hopper 23. The other structures and working principles of the quantitative dispensing device 20 are completely consistent with the published patent "Application No. CN202510357154.4" of the applicant's cooperating unit, and will not be described in detail in this embodiment.

[0036] like Figure 5 As shown, the weighing device 50 includes a weighing frame 51 installed within the overall frame 10. A weighing device 55 is installed within the weighing frame 51, and the weighing device 55 is connected to a telescopic rod 53. During the extension and retraction of the telescopic rod 53, the weighing device 55 can move up and down. To ensure smooth movement of the weighing device 55, it is mounted on a load-bearing support plate 54. A weighing guide rail 52 is also installed within the weighing frame 51. The load-bearing support plate 54 and the weighing guide rail 52 cooperate to allow the weighing device 55 to move smoothly.

[0037] The weighing device 55 is located below the material cup movement path in the second conveyor section 47. After the material cup 41 moves to this position, the telescopic rod 53 extends, lifting the supporting plate 54 and the weighing device 55, causing the weighing device 55 to lift and weigh the material cup 41. Afterwards, a zeroing operation is performed; the telescopic rod 53 retracts, causing the weighing device 55 and the material cup 41 to return to their original positions. A measured amount of medicine is injected into the material cup 41 through the quantitative dispensing device 20. The weighing device 55 then lifts the material cup 41 again and weighs the total amount of material added. After verification with the system settings, the data is reported to the non-conforming product return device 30. If there is non-conforming material, the non-conforming product return device 30 will perform the corresponding action at the next workstation.

[0038] In this embodiment, to improve weighing efficiency, two weighing devices 55 are provided, and the distance between the two weighing devices 55 is the same as the distance between two adjacent material cups 41 in the second conveying section 47. Correspondingly, the quantitative dispensing device 20 can simultaneously add material into two material cups 41, and the re-weighing device 50 can also simultaneously weigh two material cups 41.

[0039] The material cup 41 continues to move within the second conveyor section 47. When it moves to the position corresponding to the non-conforming product return device 30, it is determined whether the non-conforming product return device 30 should be activated based on the re-weighing result.

[0040] like Figure 7 , Figure 8 and Figure 9 As shown, the defective product return device 30 includes a pad 31 mounted on the upper panel 11, a return guide rail 33 mounted on the pad 31, a first rotary motor 32 below the pad 31 that can drive the return guide rail 33 (and other components mounted on the return guide rail 33) to rotate, a moving part 34 that can move up and down along the return guide rail 33 is provided on the return guide rail 33, a second rotary motor 35 is provided on the moving part 34, and the second rotary motor 35 is connected to a gripper device that can grip / release the material cup 41.

[0041] When the weighing device 50 determines that the cup 41 is defective, it moves to the position corresponding to the defective product return device 30. The gripper device picks up the cup 41, and then the moving part 34 moves it upward along the return guide rail 33 until it is above the feed hopper 23 of the dispensing device 20. Then, the first rotary motor 32 drives the return guide rail 33 and the parts mounted on it to rotate as a whole, so that the gripper device and the cup 41 it picks up are above the feed hopper 23. The second rotary motor 35 then drives the gripper device and the cup 41 it picks up to rotate, so that the cup 41 flips over and pours the material inside onto the feed hopper 23. Then, the second rotary motor 35 reverses and resets, the first rotary motor 32 reverses and resets, and the moving part 34 moves downward and resets, placing the empty cup 41 onto the second conveyor 47.

[0042] The second rotary motor 35 is equipped with a rotating part 36, and the gripper device is a gripper cylinder 38 mounted on the rotating part 36. The gripper cylinder 38 has a first gripper 381 and a second gripper 382 arranged symmetrically. When the second rotary motor 35 rotates, it drives the gripper cylinder 38, the first gripper 381 and the second gripper 382 (and the material cup 41 gripped between them) to rotate synchronously through the rotating part 36. The gripper cylinder 38 can control the first gripper 381 and the second gripper 382 to move synchronously in opposite directions (releasing the material cup 41 or passing through the material cup 41 to grip) or move towards each other (gripping the material cup 41).

[0043] A bottom-supporting cylinder 37 is also provided on the rotating part 36. The telescopic end of the bottom-supporting cylinder 37 is connected to a cup support plate 371 for supporting the cup 41. When the gripper device does not grip the cup 41, the bottom-supporting cylinder 37 drives the cup support plate 371 to retract. After gripping the cup 41, the cup support plate 371 extends and supports the bottom of the cup 41 to prevent the cup 41 from falling accidentally.

[0044] An anti-loosening spring 383 is also provided between the first gripper 381 and the second gripper 382. The anti-loosening spring 383 can tighten the first gripper 381 and the second gripper 382. Even if the gripper cylinder 38 is accidentally cut off, the two grippers can still maintain the clamping state, so that the material cup 41 is stably clamped and prevented from falling accidentally.

[0045] The bottom support cylinder 37 is also equipped with a detection part 372 for detecting the position of the material cup 41. After the two grippers pick up the material cup, the material cup 41 can be identified by a photoelectric switch to ensure that it is always in position.

[0046] The second rotary motor 35 is provided with a buffer part 39 that buffers the rotation process of the rotating part 36. A hydraulic buffer damper 391 is installed on the buffer part 39. When the rotating part 36 rotates, the hydraulic buffer damper 391 can make the rotation process of the rotating part 36 smooth and avoid violent collisions with other components.

[0047] The dispensing and weighing equipment disclosed in this embodiment has high precision, fast weighing speed, and good quality consistency. After the quantitative dispensing device 20 dispenses the medicine, the material cup 41 containing the medicine is re-weighed by the re-weighing device 50. If the re-weighing device 50 weighs out a defective product, the defective product return device 30 can return the medicine in it to the quantitative dispensing device 20. The overall dispensing efficiency of the equipment is high, which improves the reliability and accuracy of dispensing and reduces the waste of medicine.

[0048] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

[0049] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0050] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An automatic dispensing and weighing device, comprising a material cup circulation device capable of driving the material cup to reciprocate, characterized in that, The following are arranged sequentially in the direction of the cup's movement: A quantitative dispensing device that injects a specified volume of medicine into a feeding cup; A re-weighing device for weighing the container into which the medicine is injected; The unqualified material cup is picked up and the medicine inside is poured back into the quantitative dispensing device.

2. The automatic dispensing and weighing device according to claim 1, characterized in that, The re-weighing device includes a weighing device located below the material cup's movement path, and the bottom of the weighing device is provided with a telescopic rod that drives it to move up and down.

3. The automatic dispensing and weighing device according to claim 1, characterized in that, The defective product return device includes a return guide rail, a moving part that reciprocates along the return guide rail, and a first rotary motor that drives the return guide rail to rotate. The moving part is equipped with a second rotary motor, and the second rotary motor is connected to a gripper device that can clamp / release the material cup.

4. An automatic dispensing and weighing device according to claim 3, characterized in that, The second rotary motor is provided with a rotating part, and the gripper device is a gripper cylinder provided on the rotating part. The gripper cylinder has a first gripper and a second gripper arranged symmetrically.

5. An automatic dispensing and weighing device according to claim 4, characterized in that, The rotating part is also equipped with a bottom-supporting cylinder, and the telescopic end of the bottom-supporting cylinder is connected to a cup support plate for supporting the cup.

6. An automatic dispensing and weighing device according to claim 4, characterized in that, An anti-loosening spring is also provided between the first gripper and the second gripper.

7. An automatic dispensing and weighing device according to claim 4, characterized in that, The gripper device also includes a detection unit for detecting the position of the cup.

8. An automatic dispensing and weighing device according to claim 4, characterized in that, The second rotary motor is provided with a buffer part that buffers the rotation process of the rotating part.

9. An automatic dispensing and weighing device according to claim 1, characterized in that, The material cup circulation device includes a first conveying part and a second conveying part for conveying material cups. The first conveying part is connected to a first transverse pushing part that pushes the material cups on it to move. The second conveying part is connected to a second transverse pushing part that pushes the material cups on it to move. The cup circulation device further includes a first vertical pusher section for conveying the cup from the end of the second conveyor section to the beginning of the first conveyor section, and a second vertical pusher section for conveying the cup from the end of the first conveyor section to the beginning of the second conveyor section.

10. An automatic dispensing and weighing device according to claim 1, characterized in that, The material cup circulation device, quantitative dispensing device, reweighing device, and non-conforming product return device are all installed on the overall frame, and a protective shell is provided on the outside of the overall frame.

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