Disposable Mask Manufacturing Device Equipped with a Nose Piece Detection Device

Abstract

The present invention relates to a disposable mask manufacturing device equipped with a nose piece detection device capable of accurately detecting positional errors and / or non-insertion errors of a nose piece inserted between fabrics during the manufacture of a disposable mask using a simple structure, thereby preventing the production of a large number of defective products. A disposable mask manufacturing device equipped with a nose piece detection device according to the present invention for solving the above problem comprises a bracket; a sensor bar; a detection roller; and a detection sensor, wherein when a nose piece is inserted into the fabric and passes through the detection roller, the detection roller is raised to a predetermined height by the nose piece, and as the detection roller is raised, the sensor bar is rotated at a predetermined angle around the hinge, and the upper end of the vertical bar of the sensor bar moves toward the detection sensor and is detected, or moves out of position from the detection area of ​​the detection sensor, thereby detecting the presence or absence of the nose piece.

Description

Technology Field

[0001] The present invention relates to a disposable mask manufacturing device equipped with a nose piece detection device, and more specifically, to a disposable mask manufacturing device equipped with a nose piece detection device that prevents manufacturing defects of a disposable mask by detecting the presence or absence and positional defects of a nose piece when a nose piece is inserted into a mask fabric during manufacturing. Background Technology

[0002] Generally, in a disposable mask manufacturing device, when the inner layer, outer layer, filter fabric, and nose clip strap are cut to a predetermined length and supplied, wrinkles are formed in the mask fabric with each fabric and nose clip laminated together, and then ultrasonically welded. Afterward, the welded mask fabric is cut to a predetermined size, and ear loops are supplied to both sides of the cut mask fabric and ultrasonically welded to the mask fabric, thereby manufacturing a disposable mask.

[0003] However, in conventional disposable mask manufacturing devices, defects frequently occur due to misposition of the nose piece or failure to insert the nose piece, as the position of the nose piece inserted between the inner layer, outer layer, and filter fabric moves arbitrarily before ultrasonic welding or the nose piece is not supplied between the fabrics in a timely manner.

[0004] A prior art for solving the above-mentioned problem is disclosed in the disposable mask manufacturing device of Korean Patent Publication No. 2022-0094364 (hereinafter referred to as the 'Patent Document').

[0005] The above patent document describes a disposable mask manufacturing device in which, when a plurality of fabrics are provided in a stacked manner from a fabric supply unit, a nose piece is inserted in a nose piece supply unit, ultrasonic welding and cutting into a mask shape occur in a primary welding and cutting unit, the back side of the mask is folded while passing through a folding unit, and welding and cutting are performed again in a secondary welding and cutting unit to form the shape of a mask, the front side of the mask is turned upward by an inversion unit, and then the mask with ear straps attached by an ear strap welding unit passes through an ear strap organizing unit and is discharged through a discharge unit; wherein the device comprises a fabric foreign object vision inspection unit interposed between the primary welding and cutting unit and the folding unit, the light irradiation unit that irradiates inspection light onto one surface of the mask fabric, and a vision camera that detects foreign objects by reading the inspection light passing through the other surface of the mask fabric. The device further comprises a nose piece inspection unit interposed between the secondary fusion cutting unit and the inversion unit, wherein the nose piece is pressed and rotated so as to synchronize the shape of the nose piece processed in intaglio with the position where the nose piece of the mask is inserted, and a displacement sensor for determining whether the nose piece is in the correct position by measuring the height of the pressure applied by the roller.

[0006] However, the aforementioned patent document is configured such that when the nose piece of the mask does not pass through the same position as the groove of the roller, the height of the roller is raised by the nose piece, and this is detected by a displacement sensor to detect whether the nose piece is defective; however, there is a technical limitation in that if the supply of the nose piece strap is interrupted, the change in the height of the roller cannot be detected, and thus the defect of not inserting the nose piece cannot be detected.

[0007] Therefore, there is a need to develop a disposable mask manufacturing device with an improved structure that is simple yet capable of accurately detecting nose piece misalignment and / or non-insertion defects. Prior art literature

[0008] KR 10-2022-0094364 A (2022. 07. 06.)KR 10-2537707 B1 (2023. 05. 24.)KR 10-2637975 B1 (2024. 02. 14.)KR 10-2500614 B1 (2023. 02.) 13.) The problem to be solved

[0009] The present invention has been devised to solve the problems of the conventional disposable mask manufacturing device described above. The objective of the present invention is to provide a disposable mask manufacturing device equipped with a nose piece detection device that can accurately detect positional errors and / or non-insertion errors of the nose piece inserted between the fabrics during disposable mask manufacturing using a simple structure, thereby preventing the production of a large number of defective products. means of solving the problem

[0010] A disposable mask manufacturing device equipped with a nose piece detection device according to the present invention for solving the above problem comprises: a bracket installed so that the nose piece detection device has a predetermined height vertically on one side of a fabric transfer roller; a sensor bar including a vertical bar having a predetermined length vertically and a horizontal bar having a predetermined length horizontally with one end connected to the lower end of the vertical bar, wherein the other end of the horizontal bar is rotatably connected to the bracket by a hinge; a detection roller of a predetermined diameter installed at one end of the horizontal bar and in close contact with the upper surface of the fabric supplied through the fabric transfer roller; and a coil spring installed on the hinge to apply elastic force to the sensor bar so that the detection roller is maintained in close contact with the upper surface of the fabric. The invention is characterized by including a sensing sensor installed on one side of the upper portion of the bracket and detecting the upper portion of the vertical bar, wherein when the fabric is inserted with a stitch piece and passes through the sensing roller, the sensing roller is raised to a predetermined height by the stitch piece, and as the sensing roller is raised, the sensor bar is rotated at a predetermined angle around the hinge, so that the upper portion of the vertical bar moves toward the sensing sensor and is detected, or moves out of position from the sensing area of ​​the sensing sensor, thereby detecting the presence or absence of the stitch piece.

[0011] In addition, the sensor bar of the present invention is composed of first and second sensor bars installed symmetrically to each other on the bracket, and the sensing roller comprises a first sensing roller installed on the first sensor bar to detect the position of the nose piece; and a second sensing roller of a predetermined diameter installed on the second sensor bar to detect the presence or absence of the nose piece, wherein a groove of a predetermined width is formed along the outer surface of the first sensing roller through which the nose piece is inserted and passes, and the sensing sensor is composed of first and second sensing sensors that each detect the upper end of the vertical bar of the first and second sensor bars.

[0012] In addition, another feature of the present invention is that the groove is formed to have a width of 1.2 to 1.5 times the width of the nose piece.

[0013] In addition, another feature of the present invention is that the sensor bar is configured to finely adjust whether the detection sensor detects changes in the height of the detection roller by adjusting the angle formed by the vertical bar and the horizontal bar. Effects of the invention

[0014] According to the present invention, when a nose piece of a predetermined length is inserted and transported between inner and outer fabrics that are laminated and supplied through a fabric transport roller of a disposable mask manufacturing device, the position of the nose piece and / or the presence or absence of the nose piece is detected by a change in the height of a detection roller, and the sensor bar is actuated in conjunction with this change in the height of the detection roller to move to or out of the detection area of ​​the detection sensor, thereby having the advantage of being able to quickly detect the presence or absence of the nose piece and whether the nose piece has deviated from its position. Brief explanation of the drawing

[0015] FIG. 1 is a drawing showing an example of a disposable mask manufacturing device equipped with a nose piece detection device according to the present invention. FIG. 2 is a perspective view showing an example of a nose piece detection device according to the present invention. Fig. 3 is a front view of Fig. 2. FIG. 4 is a drawing showing an example in which the vertical bar and the horizontal bar of the sensor bar according to the present invention are configured to be angle-adjustable. Fig. 5 is a plan view of Fig. 2. FIG. 6 is a diagram showing an example of a nose piece being detected through a nose piece detection device according to the present invention. FIG. 7 is a drawing showing another embodiment of a nose piece detection device according to the present invention. Fig. 8 is a front view of Fig. 7. Specific details for implementing the invention

[0016] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0017] The present invention aims to provide a disposable mask manufacturing device equipped with a nose piece detection device that can accurately detect positional defects and / or non-insertion defects of nose pieces inserted between fabrics during the manufacture of disposable masks using a simple structure, thereby preventing the production of a large number of defective products. To this end, the nose piece detection device (3) of the present invention includes a bracket (10), a sensor bar (20), a detection roller (30), a coil spring (40), and a detection sensor (50), as shown in FIGS. 1 and 2.

[0018] The bracket (10) is configured to mount a sensor bar (20) and a detection sensor (50) to be described later. As shown in FIGS. 2 and 3, the bracket (10) includes a support plate (11) of a predetermined size that has a predetermined width and length in the horizontal direction and supports the bottom surface of the fabric (1) supplied through the fabric transfer roller (100), and an installation plate (12) of a predetermined size on which the sensor bar (20) and the detection sensor (50) are installed, with one end connected to the support plate (11) and the other end installed to have a predetermined height in the vertical direction.

[0019] And on one side of the lower part of the mounting plate (12), a screw hole (not shown) of a predetermined diameter is formed for assembling the hinge (H) of the sensor bar (20), and on the upper part, a through hole (not shown) of a predetermined diameter is formed for mounting the detection sensor (50) through.

[0020] At this time, the through hole can be formed as an elongated hole having a predetermined length in the left and right directions, and through this, the position can be adjusted in the left and right directions to enable the installation of the detection sensor (50), and as a result, the position of the detection area for the rotational operation range of the sensor bar (20) can be adjusted as needed.

[0021] The sensor bar (20) is configured to rotate at a predetermined angle depending on whether the nose piece (2) is detected by the detection roller (30) described later.

[0022] As shown in FIG. 3, this sensor bar (20) includes a vertical bar (21) having a predetermined length vertically and a horizontal bar (22) having a predetermined length horizontally with one end connected to the bottom of the vertical bar (21).

[0023] And a through hole (not shown in the drawing) of a predetermined diameter is formed in one end portion of the horizontal bar (22) for installing a sensing roller (30), and a hinge joint hole (not shown in the drawing) of a predetermined diameter is formed in the other end portion of the horizontal bar (22) for rotatably connecting to a screw joint hole formed in the mounting plate (12) of the bracket (10) by a hinge (H).

[0024] Additionally, the hinge (H) may be formed in the shape of a pin having a predetermined diameter, with a relatively large diameter locking projection (not shown in the drawing) formed at one end and a screw thread formed along the length of the outer surface at the other end so as to be screw-coupled to the screw coupling hole of the mounting plate (12).

[0025] Meanwhile, instead of the vertical bar (21) and horizontal bar (22) of the sensor bar (20) being formed integrally in an "L" shape, the vertical bar (21) and horizontal bar (22) having a predetermined length as shown in FIG. 4 may be manufactured separately and then configured to be joined through an assembly bolt (B) and a fixing nut (N). At this time, the assembly bolt (B) may be formed to a predetermined length so as to penetrate the sensing roller (30).

[0026] And on the surface where the vertical bar (21) and the horizontal bar (22) are joined together, a plurality of angle adjustment protrusions (not shown) may be formed radially around a hole through which an assembly bolt (B) passes.

[0027] Through the above configuration, the user can finely adjust whether the upper part of the vertical bar (21) is detected by the detection sensor (50) according to the height change (lifting motion) of the detection roller (30) by appropriately adjusting the angle at which the vertical bar (21) and the horizontal bar (22) are assembled between 80 and 100° as needed.

[0028] Through the above configuration, even if the thickness of the fabric (1) changes or the diameter of the nose piece (2) changes, the nose piece detection device (3) can be used without the need to replace it, by appropriately adjusting the detection sensitivity for the presence or absence of the nose piece and / or abnormality in the position of the nose piece according to the lifting operation of the detection roller (30).

[0029] The sensing roller (30) is configured to detect the height of the fabric supplied through the fabric conveying roller (100) by being installed at one end of the horizontal bar (22) of the sensor bar (20). The sensing roller (30) is formed in a cylindrical shape having a predetermined diameter and may also be configured as a weight having a predetermined weight so that it can be rotated while in close contact with the upper surface of the fabric (1) due to its own weight.

[0030] Additionally, depending on the type of detection roller (30), it is possible to detect the presence or absence of the nose piece (2) or the displacement of the nose piece (2). In this case, when the detection roller (30) is installed to detect the presence or absence of the nose piece (2), it is composed of a plain roller without a separate groove formed on the outer surface, whereas when the detection roller (30) is installed to detect the displacement of the nose piece (2), a groove (31A) of a predetermined depth having a predetermined width corresponding to the width of the nose piece (2) is formed on the outer surface.

[0031] Additionally, the groove (31A) is formed to have a width of 1.2 to 1.5 times the width of the nose piece (2), thereby preventing the position of the nose piece (2) from being detected as defective even though it is within the error range.

[0032] The coil spring (40) is configured to apply elastic force so that the sensing roller (30) is maintained in close contact with the upper surface of the fabric (1), and the nose piece (2) inserted between the fabric (1) is accurately detected.

[0033] The sensing roller (30) according to the present invention is installed at one end of the horizontal bar (22) of the sensor bar (20), and a hinge (H) is connected to the other end of the horizontal bar (22) so as to be rotatably installed on the bracket (10). Due to this structure, weight is concentrated toward the sensing roller (30), so the sensing roller (30) naturally adheres to the upper surface of the fabric (1) by its own weight. However, to prevent the sensing roller (30) from being mis-detected by the sensing sensor (50) due to the height being arbitrarily changed by vibrations or other factors occurring during the conveying process of the fabric (1), a coil spring (40) is installed on the hinge (H) to maintain the one end of the horizontal bar (22) of the sensor bar (20) downward by elastic force, as shown in FIGS. 2 and FIGS. 5.

[0034] With the above configuration, the sensing roller (30) is maintained in a state of being more firmly attached to the upper surface of the fabric (1) by the weight of the sensing roller (30) and the elastic force of the coil spring (40), and the sensing roller (30) is accurately raised and lowered depending on the presence or absence of the nose piece (2).

[0035] The detection sensor (50) is configured to detect the upper end of the vertical bar (21) by being installed on one side of the upper part of the bracket (10). Depending on the position of the detection sensor (50), it may be configured to determine that the nose piece (2) is inserted when the vertical bar (21) is detected as shown in FIG. 6, or to determine that the nose piece (2) is inserted when the vertical bar (21) is not detected.

[0036] This detection sensor (50) can be appropriately selected and configured from among various types of sensors (e.g., infrared sensors, etc.) that are known and widely used for easy implementation by those skilled in the art, and therefore, a detailed description of the configuration of the detection sensor (50) is omitted.

[0037] As described above, in a disposable mask manufacturing device equipped with a nose piece detection device according to the present invention, when a fabric (1) and a nose piece strap are supplied through a fabric and nose piece strap supply unit (not shown), the fabric forming the inner and outer layers and the filter fabric are stacked and supplied along a plurality of fabric transfer rollers (100). Additionally, the nose piece strap is cut to a predetermined length through a nose piece cutter (not shown) and inserted between the fabrics (1) and supplied. In this process, the inner and outer layers are fused and integrated through an ultrasonic welding machine (not shown), and then the mask is cut to a predetermined size through a mask cutter (not shown). Then, ear loops are supplied to both sides of the cut mask fabric through an ear loop supply unit (not shown), and are ultrasonically welded to both ends of the mask fabric and then discharged.

[0038] While the mask is being manufactured as described above, the presence or absence of the nose piece (2) inserted and transported between the upper and lower stacked fabrics (1) or whether the nose piece (2) has deviated from its position is detected through the nose piece detection device (3). If it is detected that the nose piece (2) is missing or has deviated from its position, the operation of the servo motor (110) is stopped, and an emergency alarm is triggered to guide an operator to perform an inspection.

[0039] Meanwhile, although the above description only illustrates and explains that a groove (31A) is selectively formed in the sensing roller (30) to perform a detection operation such as detecting the presence or absence of the nose piece (2) or detecting the displacement of the nose piece (2), it can be modified to perform both detection of the presence or absence of the nose piece (2) and detection of the displacement of the nose piece (2) together.

[0040] To this end, the nose piece detection device (3) according to the present invention may be composed of first and second sensor bars (20A, 20B) installed symmetrically on the bracket (10) as shown in FIGS. 7 and 8.

[0041] And the detection roller (30) may be composed of a first detection roller (31) installed on the first sensor bar (20A) to detect the position of the nose piece (2) and a second detection roller (32) of a predetermined diameter installed on the second sensor bar (20B) to detect the presence or absence of the nose piece (2).

[0042] Additionally, the first sensing roller (31) may have a groove (31A) of a predetermined width formed along its outer surface through which a nose piece (2) is inserted and passes.

[0043] In addition, the detection sensor (50) may be composed of first and second detection sensors (50A, 50B) that each detect the upper part of the vertical bar (21) of the first and second sensor bars (20A, 20B).

[0044] Through the configuration of the nose piece detection device (3) as described above, while the mask is being manufactured, the presence or absence of the nose piece (2) inserted and transported between the upper and lower stacked fabrics (1) and the positional deviation of the nose piece (2) are simultaneously detected.

[0045] As described above, when a nose piece of a predetermined length is inserted and transported between inner and outer fabrics that are laminated and supplied through the fabric transport roller of a disposable mask manufacturing device, the position and presence or absence of the nose piece are detected by a change in the height of the detection roller. By causing the sensor bar to operate in conjunction with this change in the height of the detection roller, it moves to or moves out of the detection area of ​​the detection sensor, thereby enabling rapid detection of the presence or absence of the nose piece and whether the nose piece has deviated from its position.

[0046] For the convenience of explanation, drawings illustrating preferred embodiments and configurations shown in the drawings have been described above using reference numerals and names; however, as this is merely one embodiment according to the present invention, the scope of the rights should not be interpreted as being limited to the shapes shown in the drawings and the names assigned thereto. It is considered entirely obvious that modifications to various shapes predictable from the description of the invention and simple substitutions with configurations having the same function fall within the scope of modifications that a person skilled in the art can easily implement. Explanation of the symbols

[0047] 1: Fabric 2: Nose knit 3: Nose piece detector 10: Bracket 11: Support plate 12: Mounting plate 20: Sensor bar 20A: 1st sensor bar 20B: 2nd sensor bar 21: Vertical bar 22: Horizontal bar 30: Sensing roller 31: 1st sensing roller 31A: Groove 32: Second sensing roller 40: Coil spring 50: Detection sensor 50A: First detection sensor 50B: Second detection sensor 100: Fabric transfer roller 110: Servo motor B: Assembly bolt H: Hinge N: Fixing nut

Claims

Claim 1 In a disposable mask manufacturing device equipped with a nose piece detection device, the nose piece detection device comprises: a bracket (10) installed vertically on one side of a fabric transfer roller to have a predetermined height; a sensor bar (20) including a vertical bar (21) having a predetermined length vertically and a horizontal bar (22) having a predetermined length horizontally with one end connected to the lower end of the vertical bar (21), wherein the other end of the horizontal bar (22) is rotatably connected to the bracket (10) by a hinge (H); and a detection roller (30) of a predetermined diameter installed at one end of the horizontal bar (22) and in close contact with the upper surface of the fabric (1) supplied through the fabric transfer roller. A disposable mask manufacturing device equipped with a nose piece detection device, comprising: a detection sensor (50) installed on one side of the upper portion of the bracket (10) and detecting the upper portion of the vertical bar (21); wherein when the nose piece (2) is inserted into the fabric (1) and passes through the detection roller (30), the detection roller (30) is raised to a predetermined height by the nose piece (2), and due to the raising of the detection roller (30), the sensor bar (20) is rotated at a predetermined angle around the hinge (H), and the upper portion of the vertical bar (21) is moved toward the detection sensor (50) and detected, or is deviated from the detection area of ​​the detection sensor (50), thereby detecting the presence or absence of the nose piece (2). Claim 2 In claim 1, the sensor bar (20) is composed of first and second sensor bars (20A, 20B) installed symmetrically to each other on the bracket (10), and the sensing roller (30) is a first sensing roller (31) installed on the first sensor bar (20A) and detecting the position of the nose piece (2); A disposable mask manufacturing device equipped with a nose piece detection device, comprising: a second detection roller (32) of a predetermined diameter installed on the second sensor bar (20B) to detect the presence or absence of the nose piece (2); wherein the first detection roller (31) has a groove (31A) of a predetermined width formed along its outer surface through which the nose piece (2) is inserted and passes, and the detection sensor (50) is composed of first and second detection sensors (50A, 50B) that respectively detect the upper ends of the vertical bars (21) of the first and second sensor bars (20A, 20B). Claim 3 A disposable mask manufacturing device equipped with a nose piece detection device, wherein, in claim 2, the groove (31A) is formed to have a width of 1.2 to 1.5 times the width of the nose piece (2). Claim 4 A disposable mask manufacturing device equipped with a nose piece detection device, wherein, in any one of claims 1 to 3, the sensor bar (20) is configured such that the detection of the detection sensor (50) is finely adjusted according to the height change of the detection roller (30) by adjusting the angle formed by the vertical bar (21) and the horizontal bar (22).

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