Empty bag detection device

Abstract

The invention discloses an empty bag detection device which comprises a trough mounting plate, a blocking mechanism, a pressing air cylinder mounting frame, a controller and a plurality of pressing detection mechanisms, and a plurality of guide troughs are sequentially formed in the front side of the trough mounting plate from left to right; the blocking mechanism comprises a blocking cylinder mounting frame, a blocking cylinder, a blocking frame mounting plate and a plurality of blocking frames; an optical fiber sensor is arranged on the front side of each blocking frame; the plurality of pressing detection mechanisms are sequentially arranged on the pressing air cylinder mounting frame from left to right; each pressing detection mechanism comprises a pressing air cylinder, a transition connecting frame, a mask pressing block, two pressing block guiding mechanisms and two thickness detection sensors. The blocking air cylinders, the optical fiber sensors, the pressing air cylinders and the thickness detection sensors communicate with the controller. According to the empty bag detection device, whether light-proof packaging bag products and aluminum foil packaging bag products are empty or not can be detected, the structure is simple and compact, the detection efficiency can be greatly improved, and the defective rate of the products is reduced.

Description

Technical Field

[0001] The present invention relates to an empty bag detection device. Background Art

[0002] After the freeze-drying process of the membrane cloth, it will go through the processes of folding → extrusion molding → palletizing → assembling the BFS water box → bagging → sealing. Before the sealing process, due to various reasons, the folding is not neat, the product fails to be removed from the pallet, and the membrane cloth, BFS water box, and pallet cannot be normally pushed into the packaging bag, resulting in missing the mask, pallet, and BFS water box in the packaging bag. If the missing-packaged bags cannot be automatically detected, it will pose a serious quality risk when flowing to the subsequent production line after sealing. Currently, the detection is completed by manual palpation or weighing. However, palpation is greatly interfered by human factors and there is a high risk of missing abnormal products. Weighing is affected by the filling volume of the BFS water and the light weight of the membrane cloth, making it more difficult to detect missing membrane cloth and increasing the risk of missing abnormal products. Especially for products in opaque packaging bags that cannot be visually detected, and aluminum foil packaging bags that cannot be detected by visual inspection or invisible light rays, electromagnetic waves, etc., the accuracy of manual detection of whether the bag is empty is low.

[0003] BFS is a continuous aseptic filling production technology that integrates three process steps of blow molding, filling, and sealing of hot-melt plastic preforms on the production line on the same device, and is also called the three-in-one technology. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide an empty bag detection device that can detect whether opaque packaging bag products (which cannot be visually detected) and aluminum foil packaging bag products (which cannot be detected by visual inspection or invisible light rays, electromagnetic waves, etc.) are empty. The structure is simple and compact. Compared with the existing manual detection, it can greatly improve the detection efficiency and reduce the defective rate of products.

[0005] The technical solution to achieve the above purpose is: an empty bag detection device, including a trough mounting plate, a blocking mechanism, a pressing cylinder mounting frame, a controller, and a plurality of pressing detection mechanisms, wherein:

[0006] A plurality of guiding troughs are sequentially arranged from left to right on the front side of the trough mounting plate, and a guiding roller is arranged at the entrance of each guiding trough;

[0007] The blocking mechanism includes a blocking cylinder mounting bracket, a blocking cylinder, a blocking frame mounting plate, and a plurality of blocking frames. The blocking cylinder mounting bracket is arranged on the front side of the guiding chute and below the guiding roller. The blocking frame mounting plate is located behind the blocking cylinder mounting bracket. The blocking cylinder is mounted in the middle of the blocking cylinder mounting bracket, and the output end of the blocking cylinder is connected to the blocking frame mounting plate. Blocking frame guiding mechanisms are respectively arranged on the left and right between the blocking cylinder mounting bracket and the blocking frame mounting plate. The plurality of blocking frames are arranged in sequence from left to right at the bottom end of the blocking frame mounting plate, and the plurality of blocking frames are respectively located at the outlets of the plurality of guiding chutes in a one-to-one correspondence. A fiber optic sensor is arranged on the front side of each blocking frame, and the fiber optic sensor is arranged on the blocking cylinder mounting bracket.

[0008] The pressing cylinder mounting bracket is located below the chute mounting plate, and the middle part of the rear side of each guiding chute is connected to the pressing cylinder mounting bracket.

[0009] The plurality of pressing detection mechanisms are arranged in sequence from left to right on the pressing cylinder mounting bracket, and the plurality of pressing detection mechanisms are respectively located in the middle parts of the plurality of guiding chutes in a one-to-one correspondence.

[0010] Each pressing detection mechanism includes a pressing cylinder, a transition connecting frame, a mask pressing block, two pressing block guiding mechanisms, and two thickness detection sensors. The pressing cylinder is arranged on the pressing cylinder mounting bracket through the transition connecting frame. The output end of the pressing cylinder is connected to the mask pressing block, and the mask pressing block is located in front of the pressing cylinder. The two pressing block guiding mechanisms are arranged one above the other on the transition connecting frame, and the front end of each pressing block guiding mechanism is connected to the mask pressing block. The two thickness detection sensors are respectively arranged on the left and right sides of the pressing cylinder.

[0011] The blocking cylinder, the fiber optic sensor, the pressing cylinder, and the thickness detection sensor are respectively in communication with the controller.

[0012] In the above-mentioned empty bag detection device, the top end of the blocking cylinder mounting bracket has a fixing bracket, and each guiding chute is connected to the fixing bracket through a chute mounting bracket group.

[0013] In the above-mentioned empty bag detection device, each blocking frame guiding mechanism includes a blocking frame guiding rail and a blocking frame guiding bearing. The blocking frame guiding bearing is mounted on the cylinder mounting bracket. The rear end of the blocking frame guiding rail is connected to the blocking frame mounting plate, and the front end passes through the blocking frame guiding bearing.

[0014] In the above-mentioned empty bag detection device, the two thickness detection sensors are respectively fixed on the transition connecting frame through sensor mounting brackets.

[0015] The above-mentioned empty bag detection device, wherein the two pressing block guiding mechanisms are located on the same side of the pressing cylinder.

[0016] The above-mentioned empty bag detection device, wherein each pressing block guiding mechanism includes a pressing block guiding rail and a pressing block guiding bearing. The pressing block guiding bearing is arranged on the transition connecting frame through a bearing mounting frame. One end of the pressing block guiding rail is connected to the mask pressing block, and the other end passes through the pressing block guiding bearing.

[0017] The above-mentioned empty bag detection device, wherein a compression spring is sleeved on the pressing block guiding rail, and the compression spring is located between the mask pressing block and the pressing block guiding bearing.

[0018] The above-mentioned empty bag detection device, wherein the bagged product falls along the guiding roller into the corresponding guiding chute. When the fiber optic sensor detects the bagged product, it sends a in-place signal to the controller. The controller controls the blocking cylinder to work, and the blocking cylinder drives the blocking frame to extend backward to block the bagged product;

[0019] The controller controls the pressing cylinder to work. When the pressing cylinder extends forward, it drives the mask pressing block and the thickness detection sensor to press against the bagged product in the guiding chute. The mask pressing block presses the bagged product tightly. The thickness detection sensor detects and obtains the thickness information of the corresponding position of the bagged product, and sends the thickness information to the controller. The controller has standard thickness data built-in. The controller compares the received thickness information with the standard thickness data. If the thickness information does not match the standard thickness data, it is determined to be an empty bag; if the thickness information matches the standard thickness data, it is determined to be a qualified product;

[0020] After the detection is completed, the controller controls the blocking cylinder and the pressing cylinder to return to their original positions.

[0021] The above-mentioned empty bag detection device, wherein the controller feeds back the determination result to the subsequent heat sealing mechanism.

[0022] The above-mentioned empty bag detection device, wherein among the two thickness detection sensors, one thickness detection sensor is used to detect the thickness information of the bagged facial mask product containing the BFS water box; the other thickness detection sensor is used to detect the thickness information of the bagged facial mask product containing the freeze-dried mask cloth, the mask cloth carrying tray or the wrinkled irregular mask cloth.

[0023] The empty bag detection device of the present invention measures the thickness dimension of the bagged product through the cooperation of the thickness detection sensor with the blocking mechanism and the pressing detection mechanism. The controller determines whether the opaque packaging bag product (which cannot be detected visually) and the aluminum foil packaging bag product (which cannot be detected visually or by invisible light rays, electromagnetic waves, etc.) are empty bags according to the thickness dimension information of the bagged item at different positions. The current use environment of the present invention is the detection of freeze-dried mask cloth, mask cloth carrying tray, BFS water box and wrinkled irregular mask cloth in freeze-dried masks. Bagged products that do not meet the requirements can be fed back to the subsequent heat sealing mechanism without sealing, and can be removed in cooperation with the subsequent rejection mechanism, so as to ensure product quality and reduce the cost of manual detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional structure diagram (front view direction) of the empty bag detection device of the present invention;

[0025] Figure 2 is a three-dimensional structure diagram (rear view direction) of the empty bag detection device of the present invention;

[0026] Figure 3 is a three-dimensional structure diagram (bottom view direction) of the empty bag detection device of the present invention;

[0027] Figure 4 is a front view of the empty bag detection device of the present invention;

[0028] Figure 5 is a side view of the empty bag detection device of the present invention;

[0029] Figure 6 is the electrical schematic diagram of the empty bag detection device of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] In order to enable those skilled in the art of the present technology to better understand the technical solutions of the present invention, the following will describe its specific embodiments in detail with reference to the accompanying drawings.

[0031] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , an embodiment of the present invention, an empty bag detection device, includes a trough mounting plate 2, a blocking mechanism, a pressing cylinder mounting frame 3, a controller 25 and a plurality of pressing detection mechanisms. In this embodiment, the number of pressing detection mechanisms is three. In actual use, the number can be set according to needs.

[0032] Three guiding troughs 1 are sequentially arranged on the front side of the trough mounting plate 2 from left to right, and a guiding roller 11 is arranged at the entrance of each guiding trough 1.

[0033] The blocking mechanism includes a blocking cylinder mounting bracket 22, a blocking cylinder 12, a blocking bracket mounting plate 21, and three blocking brackets 10. The blocking cylinder mounting bracket 22 is arranged on the front side of the guiding chute 1 and below the guiding roller 11; the top end of the blocking cylinder mounting bracket 22 has a fixing bracket 16, and each guiding chute 1 is connected to the fixing bracket 16 through a chute mounting bracket group 14.

[0034] The blocking bracket mounting plate 21 is located behind the blocking cylinder mounting bracket 22; the blocking cylinder 12 is installed in the middle of the blocking cylinder mounting bracket 22, and the output end of the blocking cylinder 12 is connected to the blocking bracket mounting plate 21; blocking bracket guiding mechanisms are respectively arranged on the left and right between the blocking cylinder mounting bracket 22 and the blocking bracket mounting plate 21. Specifically, each blocking bracket guiding mechanism includes a blocking bracket guiding rail 8 and a blocking bracket guiding bearing 9. The blocking bracket guiding bearing 9 is installed on the cylinder mounting bracket 22. The rear end of the blocking bracket guiding rail 8 is connected to the blocking bracket mounting plate 21, and the front end passes through the blocking bracket guiding bearing 9; the blocking bracket guiding bearing 9 adopts a ball linear bearing.

[0035] The three blocking brackets 10 are arranged in sequence from left to right at the bottom end of the blocking bracket mounting plate 22, and the three blocking brackets 10 are correspondingly located at the outlets of the three guiding chutes 1; a fiber optic sensor 15 is arranged on the front side of each blocking bracket 10, and the fiber optic sensor 15 is installed on the blocking cylinder mounting bracket 22. The blocking cylinder 12 drives the three blocking brackets 10 to expand and contract synchronously by driving the blocking bracket mounting plate 21 to expand and contract. The blocking bracket guiding mechanism can ensure that each blocking bracket 10 extends or retracts smoothly. The fiber optic sensor 15 is used to detect whether there is a bagged product passing through the corresponding guiding chute 1.

[0036] The pressing cylinder mounting bracket 3 is located below the chute mounting plate 2, and the middle part of the rear side of each guiding chute 1 is connected to the pressing cylinder mounting bracket 3.

[0037] Three pressing and detecting mechanisms are sequentially arranged on the pressing cylinder mounting bracket 3 from left to right, and the three pressing and detecting mechanisms are respectively located in the middle of the three guiding chutes 1; each pressing and detecting mechanism includes a pressing cylinder 4, a transition connecting bracket 23, a facial mask pressing block 13, two pressing block guiding mechanisms and two thickness detecting sensors. The two thickness detecting sensors are respectively a thickness detecting sensor 5 and a thickness detecting sensor 17. The pressing cylinder 4 is arranged on the pressing cylinder mounting bracket 3 through the transition connecting bracket 23. The output end of the pressing cylinder 4 is connected to the facial mask pressing block 13, and the facial mask pressing block 13 is located on the front side of the pressing cylinder 4; the two pressing block guiding mechanisms are arranged on the transition connecting bracket 23 one above the other, and the front end of each pressing block guiding mechanism is connected to the facial mask pressing block 13; specifically, the two pressing block guiding mechanisms are located on the same side of the pressing cylinder 4. Each pressing block guiding mechanism includes a pressing block guiding rail 7 and a pressing block guiding bearing 6. The pressing block guiding bearing 6 is arranged on the transition connecting bracket 23 through a bearing mounting bracket 19. One end of the pressing block guiding rail 7 is connected to the facial mask pressing block 13, and the other end passes through the pressing block guiding bearing 6. The pressing block guiding bearing 6 adopts a ball linear bearing. The pressing block guiding mechanism can enable the facial mask pressing block 13 to compact the part of the facial mask and the film cloth bearing tray when pressing on the bagged facial mask product, so as to ensure the accurate size detected by the thickness detecting sensor.

[0038] A compression spring 18 is sleeved on the pressing block guiding rail 6, and the compression spring 18 is located between the facial mask pressing block 13 and the pressing block guiding bearing 6. The compression spring 18 can ensure the compression and rebound of the facial mask pressing block 13 and ensure that the bagged facial mask product is not damaged.

[0039] The thickness detecting sensor 5 and the thickness detecting sensor 17 are respectively fixed on the transition connecting bracket 23 through sensor mounting brackets 20, and the thickness detecting sensor 5 and the thickness detecting sensor 17 are respectively arranged on the left and right sides of the pressing cylinder 4.

[0040] The blocking cylinder 12, the fiber optic sensor 15, the pressing cylinder 4 and the thickness detecting sensor are respectively in communication with the controller 25 (see Figure 6 ). Among the two thickness detecting sensors, the thickness detecting sensor 5 is used to detect the thickness information of the bagged facial mask product with a BFS water box; the thickness detecting sensor 17 is used to detect the thickness information of the bagged facial mask product with a freeze-dried film cloth, a film cloth bearing tray or a wrinkled and irregular film cloth.

[0041] When the empty bag detecting device of the present invention is in use, the bagged product formed after the materials (freeze-dried film cloth, film cloth bearing tray, BFS water) are bagged falls along the guiding roller 11 into the corresponding guiding chute 1. When the fiber optic sensor 15 detects the bagged product, it sends a in-place signal to the controller 25, and the controller 25 controls the blocking cylinder 12 to work. The blocking cylinder 12 drives the blocking bracket 10 to extend backward to block the bagged product and prevent the bagged product from continuing to fall.

[0042] Meanwhile, the controller 25 controls the pressing cylinder 4 to work. When the pressing cylinder 4 extends forward, it drives the mask pressing block 13, the thickness detection sensor 5, and the thickness detection sensor 17 to press against the bagged product in the guiding chute 1. The mask pressing block 13 presses the bagged product. Each thickness detection sensor detects and obtains the thickness information of the corresponding position of the bagged product, and sends the thickness information to the controller 25. The controller 25 has the standard thickness data of different positions of the bagged product built-in. The controller 25 compares the received thickness information with the standard thickness data. If the thickness information does not match the standard thickness data, it is determined to be an empty bag; if the thickness information matches the standard thickness data, it is determined to be a qualified product;

[0043] After the detection is completed, the controller 25 controls the blocking cylinder 12 and the pressing cylinder 4 to return to their original positions, and the bagged product continues to move to the subsequent workstations. The controller 25 feeds back the determination result to the subsequent heat-sealing mechanism. If it is an empty bag, the corresponding heat-sealing mechanism does not act, and it is removed by the subsequent rejection mechanism; the rejected material can be manually put back into the cartoning machine for secondary utilization.

[0044] In the empty bag detection device of the present invention, the number of the pressing detection mechanism, the guiding chute 1, and the blocking frame 10 is the same and can be set as required. In this embodiment, the number is three, and the detection of three bagged facial mask products can be realized simultaneously. It can also be used for other opaque packaging bag products or aluminum foil packaging bag products.

[0045] In summary, the empty bag detection device of the present invention can detect whether opaque packaging bag products (which cannot be detected visually) and aluminum foil packaging bag products (which cannot be detected visually or by invisible light rays, electromagnetic waves, etc.) are empty bags. The structure is simple and compact. Compared with the existing manual detection, the detection efficiency can be greatly improved, and the defective rate of products can be reduced.

[0046] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. As long as within the scope of the essential spirit of the present invention, changes and modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. An empty bag detection device, characterized in that, It includes a trough mounting plate, a blocking mechanism, a pressing cylinder mounting bracket, a controller, and several pressing detection mechanisms, where: On the front side of the trough mounting plate, several guiding troughs are arranged in sequence from left to right, and a guiding roller is arranged at the entrance of each guiding trough; The blocking mechanism includes a blocking cylinder mounting bracket, a blocking cylinder, a blocking bracket mounting plate, and several blocking brackets. The blocking cylinder mounting bracket is arranged on the front side of the guiding trough and below the guiding roller; the blocking bracket mounting plate is located behind the blocking cylinder mounting bracket; the blocking cylinder is mounted in the middle of the blocking cylinder mounting bracket, and the output end of the blocking cylinder is connected to the blocking bracket mounting plate; blocking bracket guiding mechanisms are respectively arranged on the left and right between the blocking cylinder mounting bracket and the blocking bracket mounting plate; the several blocking brackets are arranged in sequence from left to right at the bottom of the blocking bracket mounting plate, and the several blocking brackets are respectively located at the exits of the several guiding troughs in a one-to-one correspondence; a fiber optic sensor is arranged on the front side of each blocking bracket, and the fiber optic sensor is arranged on the blocking cylinder mounting bracket; The pressing cylinder mounting bracket is located below the trough mounting plate, and the middle part of the rear side of each guiding trough is connected to the pressing cylinder mounting bracket; The several pressing detection mechanisms are arranged in sequence from left to right on the pressing cylinder mounting bracket, and the several pressing detection mechanisms are respectively located in the middle of the several guiding troughs in a one-to-one correspondence; Each pressing detection mechanism includes a pressing cylinder, a transition connecting bracket, a mask pressing block, two pressing block guiding mechanisms, and two thickness detection sensors. The pressing cylinder is arranged on the pressing cylinder mounting bracket through the transition connecting bracket. The output end of the pressing cylinder is connected to the mask pressing block, and the mask pressing block is located in front of the pressing cylinder; the two pressing block guiding mechanisms are arranged one above the other on the transition connecting bracket, and the front end of each pressing block guiding mechanism is connected to the mask pressing block; the two thickness detection sensors are respectively arranged on the left and right sides of the pressing cylinder; The blocking cylinder, the fiber optic sensor, the pressing cylinder, and the thickness detection sensor are respectively in communication with the controller.

2. The empty bag detection device according to claim 1, characterized in that, The top end of the blocking cylinder mounting bracket has a fixing bracket, and each guiding trough is connected to the fixing bracket through a trough mounting bracket group.

3. The empty bag detection device according to claim 1, characterized in that, Each blocking bracket guiding mechanism includes a blocking bracket guiding rail and a blocking bracket guiding bearing. The blocking bracket guiding bearing is mounted on the cylinder mounting bracket. The rear end of the blocking bracket guiding rail is connected to the blocking bracket mounting plate, and the front end passes through the blocking bracket guiding bearing.

4. The empty bag detection device according to claim 1, wherein The two thickness detection sensors are respectively fixed on the transition connecting bracket through sensor mounting brackets.

5. The empty bag detection device according to claim 1, characterized in that, The two pressing block guiding mechanisms are located on the same side of the pressing cylinder.

6. An empty bag detection device according to claim 1 or 5, characterized in that, Each pressing block guiding mechanism includes a pressing block guiding rail and a pressing block guiding bearing. The pressing block guiding bearing is arranged on the transition connecting bracket through a bearing mounting bracket. One end of the pressing block guiding rail is connected to the mask pressing block, and the other end passes through the pressing block guiding bearing.

7. An empty bag detection device according to claim 6, characterized in that A compression spring is sleeved on the briquette guide rail, and the compression spring is located between the facial mask briquette and the briquette guide bearing.

8. The empty bag detection device according to claim 1, characterized in that, The bagged products fall along the guide roller into the corresponding guide chute. When the fiber optic sensor detects the bagged products, it sends a signal indicating that they are in place to the controller. The controller controls the blocking cylinder to operate, and the blocking cylinder drives the blocking frame to extend backward to block the bagged products. The controller controls the pressing cylinder to operate. When the pressing cylinder extends forward, it drives the facial mask briquette and the thickness detection sensor to press against the bagged products in the guide chute. The facial mask briquette presses the bagged products tightly. The thickness detection sensor detects and obtains the thickness information of the corresponding position of the bagged products, and sends the thickness information to the controller. The controller has standard thickness data built-in. The controller compares the received thickness information with the standard thickness data. If the thickness information does not match the standard thickness data, it is determined that the bag is empty; if the thickness information matches the standard thickness data, it is determined that the product is qualified. After the detection is completed, the controller controls the blocking cylinder and the pressing cylinder to return to their original positions.

9. The empty bag detection device according to claim 8, characterized in that, The controller feeds back the determination result to the subsequent heat-sealing mechanism.

10. A kind of empty bag detection device according to claim 1, characterized in that, Among the two thickness detection sensors, one thickness detection sensor is used to detect the thickness information of the bagged facial mask products containing the BFS water box; the other thickness detection sensor is used to detect the thickness information of the bagged facial mask products containing the freeze-dried fabric, the fabric carrier tray or the wrinkled and irregular fabric.

Images