WO2022118596A1

WO2022118596A1 - Mask production method and production apparatus

Info

Publication number: WO2022118596A1
Application number: PCT/JP2021/040471
Authority: WO
Inventors: 正人廣安; 崇博島田
Original assignee: 株式会社瑞光
Priority date: 2020-12-04
Filing date: 2021-11-03
Publication date: 2022-06-09

Abstract

The present invention forms cuts such as perforations or slits for facilitating the separation of a pair of ear straps in a continuous ear strap body in which a plurality of parts slated to become pairs of ear straps are in a connected state, while preventing the misalignment of the cuts, even if the continuous ear strap body is being conveyed at a high speed.　A continuous ear strap body (55) in which a plurality of parts slated to become pairs of ear straps are in a connected state is conveyed along an anvil roller (12), an image of the continuous ear strap body (55) is captured at an imaging position (12a) preceding a cutting position (12b), and the error between a target position where the next cut is to be formed and a predicted position where the next cut is predicted to be formed if a cutter roller (14) continues to rotate at a constant speed is detected from the captured image. The rotational speed of the cutter roller (14) is controlled on the basis of the detected error so that the blade tip (14k) of the cutter (14c) of the cutter roller (14) reaches the cutting position (12b) when the target position reaches the cutting position (12b).

Description

Mask manufacturing method and manufacturing equipment

The present invention relates to a mask manufacturing method and a manufacturing apparatus, and more particularly to a technique for manufacturing a mask having a pair of ear hooks connected to each other.

Conventionally, a mask having a pair of ear hooks connected to each other has been proposed. For example, FIG. 6 is a plan view of such a mask 110, showing a state in which an unused mask 110 is viewed from the skin surface side. As shown in FIG. 6, in the mask 110, an ear hook sheet 130a forming a pair of ear hook portions 130 is joined to the mask main body 120.

The pair of ear hook portions 130 have a joint portion 131 and an annular portion 132, respectively. The joint portion 131 is joined to the end region 121 of the mask body 120 via a joint point 122 by fusion. The annular portions 132 of the pair of ear hook portions 130 are joined to each other at the joint portion 134. Ear hook holes 133 are formed inside the joint portion 131 and the annular portion 132. When using the mask 110, the pair of ear hooks 130 are separated at the joint 134 and the ears are inserted into the respective ear hook holes 133.

FIG. 7 is an explanatory diagram of the manufacturing process of the mask 110. As shown in FIG. 7, each mask main body 120 is conveyed in the direction of the arrow 140 while being held by the sheet holding surface 142 of the holding roll 141. At the same time, the sheet holding surface 124 of the die cutter 123 conveys the sheet continuum 121b forming the portion to be the ear hook sheet 130a in the direction indicated by the arrow 220. Then, the mask body 120 on the holding roll 141 and the portion of the sheet continuum 121b to be the ear hook portion 130 are overlapped and joined to each other and then cut to form individual pieces of the mask 110 (for example,). , Patent Document 1).

Japanese Patent No. 5762804

As described above, the mask 110 provided with the pair of ear hooks 130 joined to each other can be manufactured at a higher speed by improving the manufacturing method.

For example, the mask body continuum is continuously formed so that the parts to be the mask body are connected, and the ear hook continuum is continuously formed so that a pair of ear hook parts are to be connected. Form. Next, while transporting the two, they are superposed and joined to form a mask continuum in which the parts to be masks are connected, and then the mask continuum being transported is sequentially cut to form a mask. Form a piece of.

When manufacturing masks while transporting the continuous body in this way, the higher the transport speed of the mask continuous body, the more the number of masks manufactured per unit time can be increased.

However, when manufacturing a mask in which cuts such as perforations and slits are formed on the boundary line between a pair of ear hooks, if the transport speed is increased, the position shift of the cuts becomes large. That is, if the timing of forming a cut in the continuous body of the ear hook during transportation is shifted, the position of the cut is shifted. Even if the timing shift of forming the cut is small, the position shift of the cut becomes large as the transport speed of the ear hook continuum becomes high.

In view of such circumstances, the problem to be solved by the present invention is that even if a plurality of parts to be paired with ear hooks are transported at high speed, the ear hooks may be continuous. It is an object of the present invention to provide a mask manufacturing method and a manufacturing apparatus capable of forming cuts such as perforations and slits for facilitating separation of a pair of ear hooks while suppressing misalignment of the cuts. ..

The present invention provides a method for manufacturing a mask configured as follows in order to solve the above problems.

The method of manufacturing the mask is as follows: (i) a step of forming a mask body continuum, (ii) a step of forming an ear hook continuum, and (iii) a cutting position between the cutter roll and the anvil roll facing each other. The ear hook continuum is conveyed along the anvil roll so that the ear hook continuum passes through, and the cutter roll and the anvil roll rotate at a predetermined constant speed in synchronization with the phase. When the target position of the ear hook continuum, which is to be the boundary line between the pair of ear hooks, passes through the cutting position, it is fixed to the cutter roll at the same time. The step of forming a cut in the ear hook continuous body by passing the cutting edge of the cutter through the cutting position, and (iv) superimposing the mask body continuous body and the ear hook continuous body at a predetermined location. It is provided with a step of forming a mask continuum by joining the mask continuums to each other and (v) a step of cutting the mask continuum to form an individual piece of the mask. Then, (a) the region of the ear hook continuum including the target position where the next cut is to be formed is imaged by the camera, and (b) the control device is based on the data captured by the camera. When the cutter roll continues to rotate at the constant speed, the predicted position where a cut is predicted to be formed next, the target position, and the amount of misalignment of the predicted position with respect to the target position are detected. (C) The cutter so that the cutting edge of the cutter reaches the cutting position at the same time when the target position reaches the cutting position based on the detected misalignment amount. Control the rotation speed of the roll.

According to the above method, even if the ear hook continuum is conveyed at high speed, a cut can be formed in the ear hook continuum while suppressing the misalignment of the cut.

In a specific embodiment, the control device temporarily changes the rotation speed of the cutter roll to the constant speed until the target position reaches the cutting position based on the detected displacement amount. By decelerating or increasing the speed from the above and then returning to the constant speed, the phase of the cutter roll is shifted with respect to the phase of the anvil roll rotating at the constant speed, and the target position reaches the cutting position. At the same time, the rotation speed of the cutter roll is controlled so that the cutting edge of the cutter reaches the cutting position.

In this case, the transport speed of the ear hook continuum can be increased.

Preferably, the control device determines the rotational speed of the cutter roll between the time the cutting edge of the cutter passes the cutting position and the time the detection of the misalignment amount for the next cut is completed. By temporarily increasing or decelerating from the constant speed and then returning to the constant speed, the phase of the displaced cutter roll is matched with the phase of the anvil roll rotating at the constant speed, and the cutter is used. The roll and the anvil roll are returned to the standard state.

In this case, the transport speed of the ear hook continuum can be increased.

Further, the present invention provides a mask manufacturing apparatus configured as follows in order to solve the above problems.

The mask manufacturing apparatus has (a) a mask body continuum forming mechanism for forming a mask body continuum, (b) an ear hooking part continuum forming mechanism for forming an ear hooking part continuum, and (c) facing each other. The ear hook has a cutter roll, an anvil roll, and a cutter fixed to the cutter roll, and the ear hook so that the ear hook continuum passes through a cutting position between the cutter roll and the anvil roll. In a standard state in which the part continuum is conveyed along the anvil roll, the cutter roll and the anvil roll rotate at a predetermined constant speed while synchronizing, and the phases match, the pair of the ear hook continuums. When the target position to be the boundary line between the ear hooks of the ear passes through the cutting position, at the same time, the cutting edge of the cutter fixed to the cutter roll passes through the cutting position, whereby the ear A mask continuum is formed by superimposing the cut-forming mechanism for forming a cut in the hooking portion continuum and (d) the mask body continuum and the ear-hooking portion continuum and joining them to each other at predetermined positions. Next, an individual piece forming mechanism for cutting the mask continuum to form individual pieces of the mask is provided. The cut forming mechanism is based on (i) a camera that captures an image of a region of the ear hook continuum including a target position where a cut is to be formed next, and (ii) data captured by the camera. When the cutter roll continues to rotate at the constant speed, the predicted position where a cut is predicted to be formed next, the target position, and the amount of misalignment of the predicted position with respect to the target position are detected. Based on the detected misalignment amount, the rotation speed of the cutter roll is controlled so that when the target position reaches the cutting position, the cutting edge of the cutter reaches the cutting position at the same time. It also has a control device.

According to the above configuration, even if the ear hook continuum is conveyed at high speed, a cut can be formed in the ear hook continuum while suppressing the misalignment of the cut.

In this case, the transport speed of the ear hook continuum can be increased.

Preferably, the control device determines the rotational speed of the cutter roll between the time the cutting edge of the cutter passes the cutting position and the time the detection of the misalignment amount for the next cut is completed. By temporarily increasing or decelerating from the constant speed and then returning to the constant speed, the phase of the displaced cutter roll is matched with the phase of the anvil roll rotating at the constant speed, and the cutter roll is And the anvil roll are returned to the standard state.

In this case, the transport speed of the ear hook continuum can be increased.

According to the present invention, even if a plurality of parts to be a pair of ear hooks are transported at high speed, the pair of ear hooks can be separated from each other. Cuts such as perforations and slits for facilitation can be formed while suppressing the misalignment of the cuts.

FIG. 1 is a schematic diagram of a mask manufacturing process. (Example 1) FIG. 2 is a schematic diagram of the mask manufacturing process. (Example 1) FIG. 3 is an enlarged schematic view of a main part of the mask manufacturing apparatus. (Example 1) FIG. 4 is a time chart of the operation of the mask manufacturing apparatus. (Example 1) FIG. 5 is a schematic diagram of an image captured by the camera. (Example 1) FIG. 6 is a plan view of the mask. (Conventional example 1) FIG. 7 is an explanatory diagram of the mask manufacturing process. (Conventional example 1)

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Example 1> The mask manufacturing method and manufacturing apparatus of the first embodiment will be described with reference to FIGS. 1 to 5.

First, an outline of the mask manufacturing method of Example 1 will be described with reference to FIGS. 1 and 2. 1 and 2 are schematic views showing a mask manufacturing process.

As shown in FIG. 1 (a), the first and second ear

hook member continuums

54s and 54t in the stretched state are formed, and are conveyed in the longitudinal direction in parallel with each other at a predetermined interval. In the first and second ear

hook member continuums

54s and 54t, for example, an elastic member such as a rubber thread is sandwiched between the nonwoven fabric webs in a stretched state, and the elastic member and the nonwoven fabric web are separated by ultrasonic welding or heat sealing. It is formed by joining them together at predetermined intervals.

Next, as shown in FIG. 1 (b), the third ear hook member 56 is sequentially arranged on the first and second ear

hook member continuums

54s and 54t being transported with a predetermined interval. Then, by joining by ultrasonic welding, heat sealing, or the like, a pair of

ear hook portions

51a, 51b (see FIG. 2 (h)) are formed to form a continuous ear hook portion 55 in which a plurality of portions are connected. For example, the third ear hook member 56 is arranged on the first and second ear

hook member continuums

54s, 54t so as to straddle the first and second ear

hook member continuums

54s, 54t in the extended state. After that, the third ear hook member 56 and the first and second ear

hook member continuums

54s and 54t are joined to each other by ultrasonic welding, heat sealing, or the like to form a joint portion 55k.

When a notch 56x is formed in the center of one end 56a of the third ear hook member 56, the one end 56a side of the third ear hook member 56 is the first and second ear hook member continuum 54s, The third ear hook member 56 and the third ear hook member 56 so as to project outward from 54t and the both

side edges

56p, 56q of the third ear hook member 56 are orthogonal to the first and second ear

hook member continuums

54s, 54t. The first and second ear

hook member continuums

54s and 54t are joined to each other by ultrasonic welding, heat sealing or the like. The center line 72 of the third ear hook member 56 serves as a boundary line between the pair of

ear hook portions

51a and 51b (see FIG. 2H).

Next, as shown in FIG. 1 (c), the extension of the first and second ear

hook member continuums

54s and 54t of the ear hook continuous body 55 is relaxed or eliminated. As a result, the distance between the third ear hook members 56 adjacent to each other is narrowed.

Next, as shown in FIG. 1 (d), a cut 57 is formed in the center of the third ear hook member 56, that is, on the center line 72 (see FIG. 1 (c)). The cut 57 does not have to be formed in the first and second ear

hook member continuum

54s, 54t, but preferably, the thread of the first and second ear

hook member continuum

54s, 54t is formed by the cut 57. Make sure that the elastic member such as rubber and the non-woven fabric web are partially or completely cut.

Apart from the process shown in FIG. 1, as shown in FIG. 2 (e), the mask main body continuum 52x to which the portion 52a to be the mask main body 52 (see FIG. 2 (h)) is connected is continuously connected. Form and transport. For example, the mask main body continuum 52x is formed by folding the web so as to form a polygonal line (not shown) extending in the transport direction while transporting one or two or more non-woven fabrics or the like. .. Nose-fitting members (not shown) may be arranged on the mask main body continuum 52x at predetermined intervals.

Next, as shown in FIG. 2 (f), the mask main body continuum 52x is planned to become the mask main body while transporting the mask main body continuous body 52x and the ear hook continuous body 55 after the cut 57 is formed. 52a (see FIG. 2 (e)) and the portion 55a of the ear hook continuum 55 to be a pair of ear hooks 51a and 51b (see FIG. 2 (h)).

Next, as shown in FIG. 2 (g), the mask main body continuum 52x and the first and second ear

hook member continuums

54s and 54t of the ear hook part continuum 55 are subjected to ultrasonic welding, heat sealing, or the like. By joining each other at a predetermined position to form a joint portion 58, a mask continuum 50x is formed in which a portion 50a to be a mask 50 is connected.

Next, the mask continuum 50x is cut at the position indicated by the chain line 59 in FIG. 2 (g) to form individual pieces of the mask 50 as shown in FIG. 2 (h).

In the mask 50, both ends of the first and second

ear hook members

54a and 54b separated from the first and second ear

hook member continuums

54s and 54t of the ear hook continuous body 55 are separated from the joint portion 58. It is joined to the mask main body 52 by the joined

portions

58a and 58b. The third ear hook member 56 is arranged in the center of the mask 50 and is joined to the first and second

ear hook members

54a and 54b.

The first and second

ear hook members

54a and 54b and the third ear hook member 56 form a pair of

ear hook portions

51a and 51b for inserting ears. When the third ear hook member 56 and the first and second

ear hook members

54a and 54b are separated along the cut 57, the pair of

ear hook portions

51a and 51b can be separated.

Next, the mask manufacturing apparatus 10 of the first embodiment will be described with reference to FIG. FIG. 3 is a schematic diagram conceptually showing the configuration of the mask manufacturing apparatus 10 used for manufacturing the mask 50.

As shown in FIG. 3, the mask manufacturing apparatus 10 includes a mask main body continuum forming mechanism 10a for forming the mask main body continuous body 52x, an ear hooking portion continuous body forming mechanism 10b for forming the ear hooking portion continuous body 55, and the ear hooking portion continuous body forming mechanism 10b. A cut forming mechanism 10c and an individual piece forming mechanism 10d are provided.

The individual piece forming mechanism 10d forms the mask continuous body 50x (see FIG. 2 (g)) by superimposing the mask main body continuous body 52x and the ear hook continuous body 55 and joining them to each other at predetermined positions, and then forming the mask continuous body 50x (see FIG. 2 (g)). , The mask continuum 52x is cut to form individual pieces of the mask 50 (see FIG. 2 (h)).

The cut forming mechanism 10c executes a step of forming a cut 57 in the third ear hook member 56 shown in FIG. 1 (d). The cut forming mechanism 10c includes an anvil roll 12 and a cutter roll 14 arranged so as to face each other, a sensor 15, a camera 18, and a control device 11, and an ear hook continuum 55 is a cutter roll 14. It is configured to be conveyed along the outer peripheral surface of the anvil roll 12 in the directions indicated by the

arrows

55x and 55y so as to pass through the cutting position 12b between the anvil roll 12 and the anvil roll 12. The anvil roll 12 and the cutter roll 14 are rotationally driven by the

motors

12m and 14m in the directions indicated by the

arrows

12r and 14r.

Three cutters 14c are fixed to the cutter roll 14 at equal intervals in the circumferential direction, and the cutting edge 14k of the cutter 14c protrudes outward in the radial direction. The number of cutters 14c may be 1, 2, or 4 or more.

An appropriate number (for example, 3) of anvils 12k (see FIG. 5) are fixed to the anvil roll 12, and when the anvil roll 12 and the cutter roll 14 rotate in synchronization with each other, the anvil roll 12 and the cutter roll 14 are rotated. At the cutting position 12b facing each other, the anvil 12k and the cutting edge 14k of the cutter 14c fixed to the cutter roll 14 are configured to face each other. Therefore, when the cutting edge 14k of the cutter 14c of the cutter roll 14 reaches the cutting position 12b where the anvil roll 12 and the cutter roll 14 face each other, the ear hook continuous body is formed between the cutting edge 14k of the cutter 14c and the anvil 12k. By sandwiching the 55, a cut 57 is formed in the third ear hook member 56 of the ear hook continuum 55.

The cut 57 may penetrate between one main surface and the other main surface of the ear hook continuum 55, or may not penetrate between one main surface and the other main surface, and may have a depth halfway. The cut 57 may be formed at one place or at a plurality of places, and the length can be arbitrarily selected. As the cut 57, for example, a perforation in which cuts of the same length are arranged at equal intervals may be formed, or a relatively long slit at one place or a plurality of places may be formed. The cut 57 is typically formed linearly in a direction orthogonal to the transport direction of the ear hook continuum 55, but can also be formed in a curved shape or the like.

The dog 14d is fixed to the cutter roll 14 at a predetermined position for each cutter 14c. The cutter 14c and the dog 14d rotate integrally with the cutter roll 14.

The sensor 15 is fixed at a position adjacent to the cutter roll 14 and detects the passage of the dog 14d fixed to the cutter roll 14.

The camera 18 images the ear hook continuum 55 at the image pickup position 12a on the upstream side in the transport direction from the cutting position 12b. The imaging position 12a is preferably a position where the ear hook continuum 55 starts to follow the anvil roll 12 or its vicinity thereof.

Next to the camera 18,

lighting devices

19a and 19b that illuminate the imaging position 12a are arranged.

The

motors

12m and 14m, the sensor 15, and the camera 18 are connected to the control device 11. The control device 11 is composed of a motion controller, a driver for a motor, and the like, controls the entire control of the mask manufacturing device 10 according to a predetermined program, and is a third ear hook of the ear hook continuum 55 at the cutting position 12b. The

motors

12m and 14m are controlled so that the cut 57 is formed in the member 56.

FIG. 4 is a timing chart of the operation of the mask manufacturing apparatus 10 when the cut 57 is formed in the ear hook continuum 55. 4 (a) shows the detection signal 15x of the sensor 15, FIG. 4 (b) shows the timing chart 11x of the error detection process, and FIG. 4 (c) shows the control signal 12x for the motor 12 for driving the anvil roll 12. Reference numeral 4 (d) indicates a control signal 14x for the motor 14m for driving the cutter roll 14.

When the mask manufacturing device 10 is activated, the control device 11

outputs control signals

12q and 14q in which the

motors

12m and 14m rotate at a predetermined constant speed, as indicated by

reference numerals

12p and 14p. At this time, the control device 11 outputs the control signals 12q and 14q so that the phases of the

motors

12m and 14m match. As a result, the cutter roll 12 and the anvil roll 14 rotate at a predetermined constant speed in synchronization with each other to reach a standard state in which the phases match.

As shown by the reference numeral 15p, when the sensor 15 detects the dog 14d, the error detection process of the movement amount is executed for the third ear hook member 56 forming the cut 57 next in the period indicated by the reference numeral 11p. That is, when the sensor 15 detects the dog 14d, the

lighting devices

19a and 19b emit light, and at the same time, the camera 18 takes an image of the third ear hook member 56 moving in the image pickup position 12a, and the control device 11 from the camera 18. The image is sent to the camera, and the control device 11 analyzes the image to detect an error in the amount of movement of the third ear hook member 56.

FIG. 5 is a schematic diagram of an image captured by the camera 18. In FIG. 5, the direction of the arrow 55z is the transport direction of the ear hook continuum 55. For example, the control device 11 detects the position of the center line 72 of the third ear hook member 56 with reference to the notch 56x in the image near one end 56a of the third ear hook member 56 shown in FIG. , The error 80 between the position of the center line 72 and the position of the reference line 70 is detected.

The position of the reference line 70 is the center line of the anvil 12k (the center line extending parallel to the rotation center line of the anvil roll 12), and the ear hook continuum when the cutter roll 14 continues to rotate at a constant speed. It is a predicted position where a cut 57 is expected to be formed at 55. The position of the center line 72 of the third ear hook member 56 is the boundary line between the pair of

ear hook portions

51a and 51b of the ear hook portion continuum 55, and then the target position where the cut 57 is to be formed. Is. The error 80 between the position of the center line 72 and the position of the reference line 70 is the amount of misalignment of the predicted position with respect to the target position.

The target position, that is, the position of the center line 72 of the third ear hook member 56 may be detected by an appropriate method. The target position may be detected from a shape other than the notch 56x of one end 56a of the third ear hook member 56, for example, a curved shape. Further, the target position may be detected by a through hole, a mark, or the like formed in the third ear hook member 56, and both

side edges

56p, 56q of the third ear hook member 56 (see FIG. 1 (b)). The position of the above may be detected and the center position thereof may be set as the target position.

Next, the control device 11 controls the speed of the motor 14 m based on the detected error 80 so that the detected error 80 is eliminated by the time the third ear hook member 56 reaches the cutting position 12b. .. That is, the control device 11 sets the cutter roll 14 so that the cutting edge 14k of the cutter 14c of the cutter roll 14 reaches the cutting position 12b when the target position reaches the cutting position 12b based on the detected error 80. Control the rotation speed.

For example, when the position (predicted position) of the reference line 70 reaches the cutting position 12b before the position (target position) of the center line 72 of the third ear hook member 56, as indicated by reference numeral 14s, By temporarily decelerating the speed of the motor 14m and then returning it to the original speed, the phase of the motor 14m is delayed from the phase of the motor 12m rotating at a constant speed. As a result, the cutter roll 14 and the anvil roll 12 are no longer in the standard state.

After the cutting edge 14k of the cutter 14c of the cutter roll 14 reaches the cutting position 12b and a cut is formed in the third ear hook member 56, the sensor 15 detects the next dog 14d as indicated by the reference numeral 15q. In the period indicated by 11q, the same error detection process is executed for the next cut to be formed, and the phase shift of the motor 14m with respect to the phase of the motor 12m rotating at a constant speed before the period indicated by the reference numeral 11q elapses. Is resolved, and the cutter roll 14 and the anvil roll 12 are returned to the standard state.

For example, when the phase of the motor 14m is delayed as shown by the reference numeral 14s, the control device 11 temporarily increases the speed of the motor 14m and then returns it to the original speed as shown by the reference numeral 14t. The phase of the motor 14m is matched with the phase of the motor 12m rotating at a constant speed, and the cutter roll 14 and the anvil roll 12 are returned to the standard state.

Then, after the period indicated by reference numeral 11q elapses, the control device 11 temporarily increases the speed of the motor 14m and then returns it to the original speed based on the detected error, for example, as indicated by reference numeral 14u. , The phase of the motor 14m is advanced from the phase of the motor 12m rotating at a constant speed. As a result, the cutter roll 14 and the anvil roll 12 are no longer in the standard state.

When the sensor 15 detects the next dog 14d as indicated by reference numeral 15r after the next cut is formed, the same error detection process is executed for the next cut to be formed during the period indicated by reference numeral 11r. Before the period indicated by reference numeral 11r elapses, the phase shift of the motor 14m with respect to the phase of the motor 12m rotating at a constant speed is eliminated. For example, when the phase of the motor 14m is advanced as shown by the reference numeral 14u, the phase of the motor 14m is temporarily reduced and then returned to the original speed as shown by the reference numeral 14v. Is matched with the phase of the motor 12m rotating at a constant speed, and the cutter roll 14 and the anvil roll 12 are returned to the standard state.

Hereafter, the same operation is repeated.

By shifting the phase of the motor 14m with respect to the phase of the motor 12m rotating at a constant speed as described above, it is possible to deal with an error 80 in the range of ± 2 mm, for example.

As explained above, the mask manufacturing method is as follows.
(I) A step of forming the mask body continuum 52x (see FIG. 2E),
(Ii) The step of forming the ear hook continuum 55 (see FIG. 1 (c)),
(Iii) The ear hook continuum 55 is passed along the anvil roll 12 so that the ear hook continuum 55 passes through the cutting position 12b between the cutter roll 14 and the anvil roll 12 facing each other. The boundary line between the pair of ear hooks of the ear hook continuum 55 in a standard state in which the cutter roll and the anvil roll rotate at a predetermined constant speed and have the same phase while being conveyed. When the target position 72 scheduled to be The process of forming the cut 57 in the body 55 (see FIGS. 1 (c), (d), and 3).
(Iv) A step of forming a mask continuum 50x by superimposing the mask body continuous body 52x and the ear hook continuous body 55 and joining them at predetermined positions (that is, at the joint portion 58). 2 (g)),
(V) A step of cutting the mask continuum 50x to form individual pieces of the mask 50 (see FIG. 2 (h)).
Equipped with
(A) The area of the ear hook continuum 55 including the target position where the cut 57 is to be formed next is imaged by the camera 18.
(B) The predicted position 70 in which the cut 57 is predicted to be formed next when the cutter roll 14 continues to rotate at the constant speed based on the data captured by the camera 18. The target position 72 and the misalignment amount 80 of the predicted position 70 with respect to the target position 72 are detected (see FIG. 5).
(C) When the target position 72 reaches the cutting position 12b based on the detected misalignment amount 80, the cutting edge 14k of the cutter 14c simultaneously moves to the cutting position 12b. The rotation speed of the cutter roll 14 is controlled so as to reach it.

According to the above method, when the target position 72, which is to be the boundary line between the pair of ear hooks 51a and 51b of the ear hook continuum 55, passes through the cutting position 12b, the cutter is set at the target position 72. The cut 57 can be formed by the cutting edge 14k of the cutter 14c of the roll 14. Since the control device 11 controls the rotation speed of the cutter roll 14, even if the ear hook continuum 55 is conveyed at high speed, the cut 57 is provided in the ear hook continuum 55 while suppressing the misalignment of the cut 57. Can be formed.

Specifically, the control device 11 temporarily sets the rotation speed of the cutter roll 14 until the target position 72 reaches the cutting position 12b based on the detected misalignment amount 80. By decelerating or increasing the speed from the constant speed and then returning to the constant speed (see

reference numerals

14s and 14u in FIG. 4), the phase of the cutter roll is changed with respect to the phase of the anvil roll rotating at the constant speed. The rotation speed of the cutter roll 14 is controlled so that the cutting edge 14t of the cutter 14c reaches the cutting position 12b at the same time when the target position 72 reaches the cutting position 12b.

In this case, by temporarily changing the rotation speed of the cutter roll 14, the phase shift of the cutter roll 14 with respect to the predicted position 70 can be eliminated in a short time. Therefore, the transport speed of the ear hook continuum 55 can be increased.

Further, the control device 11 has the cutter roll from the time when the cutting edge 14k of the cutter 14c passes through the cutting position 12b until the detection of the misalignment amount 80 for the next cut 57 is completed. By temporarily increasing or decelerating the rotational speed of 14 from the constant speed and then returning to the constant speed (see

reference numerals

14t, 14v in FIG. 4), the phase of the cutter roll shifted is said to be constant. The cutter roll and the anvil roll are returned to the standard state in accordance with the phase of the anvil roll rotating at a speed.

In this case, when the rotation speed of the cutter roll 14 is controlled in order to eliminate the misalignment of the cut to be formed next, the phase of the cutter roll 14 coincides with the phase of the anvil roll, so that the misalignment is caused. The fluctuation range of the rotation speed of the cutter roll 14 for eliminating the problem can be reduced. Therefore, the transport speed of the ear hook continuum 55 can be made higher.

<Summary> As explained above, even if a pair of ear hooks that are planned to be a pair of ear hooks are transported at high speed, the pair of ear hooks will be attached to the pair of ear hooks. Cuts such as perforations and slits for facilitating the separation of the portions can be formed while suppressing the misalignment of the cuts.

The present invention is not limited to the above embodiment, and can be implemented with various modifications.

For example, the timing of capturing the image of the region including the target position where the next cut is to be formed in the ear hook continuum is preferably immediately after the cutting edge of the cutter passes the cutting position, but the cutting position is set to the cutter. It may be before the cutting edge passes or at the same time as the cutting edge of the cutter passes through the cutting position.

10 Mask manufacturing equipment 10a Mask body continuous body forming mechanism 10b Ear hook continuous body forming mechanism 10c Cut forming mechanism 10d Piece forming mechanism 11 Control device 12 Anvil roll 12b Cutting position 12k Anvil 14 Cutter roll 14c Cutter 14k Cutting edge 18 Camera 50 Mask 50a Part to be mask

50x Mask continuum

51a, 51b Ear hook 52 Mask body 52a Mask body 52x Mask body continuous 55 Ear hook continuum 55a Pair of ear hooks Part 57 Cut 70 Reference line (predicted position)
72 Center line (target position)
80 error (amount of misalignment)

Claims

The process of forming the mask body continuum and
The process of forming the ear hook continuum and
The ear hook continuum is conveyed along the anvil roll so that the ear hook continuum passes through the cutting position between the cutter roll and the anvil roll facing each other, and the cutter roll and the anvil roll are conveyed. In the standard state where the rolls rotate at a predetermined constant speed while synchronizing with the roll and the phases match, the target position to be the boundary line between the pair of ear hooks of the ear hook continuum is the cutting position. At the same time, the cutting edge of the cutter fixed to the cutter roll passes through the cutting position to form a cut in the ear hook continuum.
A step of forming a mask continuum by superimposing the mask body continuum and the ear hook continuum and joining them to each other at predetermined positions.
The step of cutting the mask continuum to form individual pieces of the mask,
Equipped with
The area of the ear hook continuum including the target position where the next cut is to be formed is imaged with a camera.
Based on the data captured by the camera, the control device predicts that the next cut will be formed when the cutter roll continues to rotate at the constant speed, the target position, and the target position. Detecting the amount of misalignment of the predicted position with respect to the target position,
Based on the amount of misalignment detected by the control device, the rotation of the cutter roll so that the cutting edge of the cutter reaches the cutting position at the same time when the target position reaches the cutting position. A method of manufacturing a mask that controls the speed.
The control device is based on the detected amount of misalignment.
By the time the target position reaches the cutting position, the rotation speed of the cutter roll is temporarily decelerated or increased from the constant speed and then returned to the constant speed to reduce the phase of the cutter roll. The cutter is displaced with respect to the phase of the anvil roll rotating at a constant speed so that when the target position reaches the cutting position, the cutting edge of the cutter reaches the cutting position at the same time. The method for manufacturing a mask according to claim 1, wherein the rotation speed of the roll is controlled.
The control device is
Between the time when the cutting edge of the cutter passes through the cutting position and the time when the detection of the amount of misalignment is completed for the next cut.
The anvil roll that rotates the phase of the cutter roll shifted at the constant speed by temporarily increasing or decelerating the rotation speed of the cutter roll from the constant speed and then returning to the constant speed. The method for manufacturing a mask according to claim 2, wherein the cutter roll and the anvil roll are returned to the standard state in accordance with the phase.
The mask body continuum formation mechanism that forms the mask body continuum,
The ear hook continuum formation mechanism that forms the ear hook continuum,
It has a cutter roll and anvil roll facing each other, and a cutter fixed to the cutter roll, so that the ear hook continuum passes through a cutting position between the cutter roll and the anvil roll. The ear hook continuum is conveyed along the anvil roll, and in a standard state in which the cutter roll and the anvil roll rotate at a predetermined constant speed while synchronizing with each other and the phases match, the ear hook continuum When the target position to be the boundary line between the pair of ear hooks passes through the cutting position, at the same time, the cutting edge of the cutter fixed to the cutter roll passes through the cutting position. , A cut forming mechanism that forms a cut in the ear hook continuum,
The mask body continuum and the ear hook continuum are superposed and joined to each other at predetermined positions to form a mask continuum, and then the mask continuum is cut to form individual pieces of the mask. The individual piece formation mechanism and
Equipped with
The cut forming mechanism is
A camera that captures the area of the ear hook continuum that includes the target position where the next cut will be formed.
Based on the data captured by the camera, the predicted position where the next cut is predicted to be formed when the cutter roll continues to rotate at the constant speed, the target position, and the target position with respect to the target position. Detects the amount of misalignment of the predicted position and
Control to control the rotation speed of the cutter roll so that the cutting edge of the cutter reaches the cutting position at the same time when the target position reaches the cutting position based on the detected misalignment amount. With the device,
Further has a mask manufacturing device.
The control device is based on the detected amount of misalignment.
By the time the target position reaches the cutting position, the rotation speed of the cutter roll is temporarily decelerated or increased from the constant speed and then returned to the constant speed to reduce the phase of the cutter roll. The cutter is displaced with respect to the phase of the anvil roll rotating at a constant speed so that when the target position reaches the cutting position, the cutting edge of the cutter reaches the cutting position at the same time. The mask manufacturing apparatus according to claim 4, which controls the rotation speed of the roll.
The control device is
Between the time when the cutting edge of the cutter passes through the cutting position and the time when the detection of the amount of misalignment is completed for the next cut.
The anvil roll that rotates the phase of the cutter roll shifted at a constant speed by temporarily increasing or decelerating the rotation speed of the cutter roll from the constant speed and then returning to the constant speed. The mask manufacturing apparatus according to claim 5, wherein the cutter roll and the anvil roll are returned to the standard state in phase with each other.