JPH0780611B2 - Method and apparatus for continuously attaching pad to adhesive film - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention generally relates to a method and apparatus for continuously applying a pad to an adhesive film.

More specifically, the present invention relates to a continuous pad sticking method and apparatus suitable for use in the process of manufacturing a first aid bandage.

[Prior Art] According to the pasting method and the pasting device of the pad in the conventional first-aid bandage manufacturing process, the long adhesive film is in a state where its adhesive surface is exposed on the surface by the intermittent feeding device having a suction function, It is intermittently fed out to a fixed attachment position according to the pad attachment interval.

On the other hand, the pad cut into a certain size is intermittently transferred by the intermittent transfer device to the vicinity of the pasting position, and is stuck to the adhesive film while being suction-held by a pickup piece having a suction nozzle at the tip.

At this time, the pickup piece operates intermittently in synchronism with the intermittent transfer of the adhesive film and the pad, and also operates to repeat suction and stop of suction of the pad in synchronization with the intermittent transfer.

[Problems to be Solved by the Invention] As described above, the main drawback of applying the pad to the adhesive film by the intermittent motion is that it is extremely difficult to increase the speed. When the application of the pad is performed by intermittent exercise, for example, the subsequent steps in the production line of the first-aid bandage must be mainly an intermittent exercise, so that the conventional first-aid bandage manufacturing apparatus and method of the first-aid bandage can be used. The maximum production capacity was only 250 to 300 sheets per minute.

Another drawback of the operation by the intermittent motion is that it is inevitable to use a cam mechanism that repeatedly repeats the operation and the stop in the intermittent driving part, and the mechanical noise due to the intermittent operation of the cam is extremely high. Wear is severe.

It is an object of the present invention to provide a continuous sticking method for a pad, which is much faster than the conventional method and apparatus and has less mechanical noise due to operation and wear of parts, and an apparatus therefor. is there.

“Means for Solving Problems” A method for continuously attaching a pad to an adhesive film according to the present invention is, in order to achieve the above-mentioned object, to sequentially transfer a long pad material in a suction state to a predetermined dimension. And a step of separating the pads adjacent to each other in the front and rear by sequentially increasing the transfer speed in a state in which the pads are sequentially sucked and held in a fixed posture and continuously transferred while being strongly pinched. , A step of bringing the pad closer to the adhesive surface of the long-length adhesive film being fed and being transferred while the adhesive surface is exposed on the surface while the pad is further transferred, in a state of being in agreement with the transfer direction of the adhesive film, And a step of sequentially releasing at the proximity position and adhering to the adhesive surface.

In the step of bringing the pad close to the adhesive surface of the long-length adhesive film being fed out in a state of being in agreement with the transfer direction of the adhesive film while transferring the pad, the transfer speed of the pad is the same as the transfer speed of the adhesive film. It is preferable to synchronize them.

The continuous sticking device for a pad according to the present invention is, in order to achieve the above-mentioned object, a film transfer device for continuously transferring a long adhesive film in a certain direction in a state where an adhesive surface appears on the surface,
A rotary die cutter that holds a long pad material by suction and transfers it to a predetermined delivery position at a lower speed than the film transfer device, and a transfer speed of the rotary die cutter at the delivery position that cuts into a pad of a predetermined size. A circular orbit in which the pads are sequentially received in synchronism with each other, and then the speed is sequentially increased to approach the transfer surface of the film transfer device in a state in which the transfer direction is matched, and after the proximity, the transfer speed is gradually decreased to return to the transfer position. And a pad holding part having a suction hole and a side part of the pad holding part, which faces the surface of the pad holding part. And a suction piece of the pad holding portion, and a suction piece of the pad holding portion is provided for moving the film transfer device from when the transfer piece reaches the delivery position. The suction piece of the pressing piece is connected to the vacuum suction means until it comes close to or near the surface, and after the suction hole of the pad holding portion of the transfer piece communicates with the vacuum suction means, the transfer piece moves at the transfer speed. Before being raised, it stands upright and is pressed against the surface of the pad holding portion, and the transfer piece increases its transfer speed and then falls apart until it comes close to the transfer surface of the film transfer device after being separated from an adjacent subsequent transfer piece. It is characterized in that it is separated from the surface of the pad holding portion.

[Operation] According to the continuous pad sticking method of the present invention, the pad material is cut into a pad having a predetermined size in the process of being continuously transferred. Each of the cut pads is continuously transferred, and the adjacent ones in the front and back are separated from each other.
Separately, it is continuously adhered to the adhesive surface of the adhesive film which is continuously transferred at regular intervals. Therefore, higher-speed continuous application becomes possible.

In this way, in the process of continuous transfer, the pad material is continuously cut to a certain size, and when the pad thus cut is continuously attached to the adhesive film, the number of incomplete cuts between adjacent pads is small. It becomes a problem.

That is, since the pad material is made of non-woven fabric, when it is cut while continuously transferring it, it is not uncommon for the fine fibers of the non-woven fabric to not be completely cut and to be partially connected to the adjacent pad. In that case, subsequent continuous processing becomes difficult, or defective products occur.

The continuous sticking method according to the present invention, each pad after cutting,
The above problem is solved by sequentially sucking and holding in a fixed posture and continuously transferring, and gradually increasing the transfer speed in a strongly pinched state to separate the adjacent pads in the front and rear.

For example, even if adjacent pads in the front and back are partially connected by the material fibers, the fibers that are in continuous connection are torn apart and completely separated by being pulled apart while being strongly sandwiched during the transfer. It enables high-speed continuous processing thereafter.

According to the continuous pad sticking apparatus of the present invention, the continuous sticking method of the present invention described above is smoothly carried out.

That is, each pad continuously cut to a predetermined size by the rotary die cutter is received by the pad holding portion at the delivery position by the suction hole in the pad holding portion of the transfer piece of the cyclic transfer device communicating with the vacuum suction means. , Is continuously transferred to a position close to the adhesive surface of the adhesive film.

In the process of this transfer, the pressing piece is erected and the pad is strongly sandwiched between the surface of the pad holding portion and the pressing piece, and then the transfer piece is sequentially increased in speed so that the pad and the succeeding pad are sequentially moved. Is put away from Pat.

Then, when the pressing piece falls down and separates from the surface of the pad holding part and the transfer piece approaches the transfer surface of the film transfer device, the suction hole of the pad holding part is cut off from the vacuum suction means, so that the pad sticks to the adhesive film. Attached to the surface.

"Example" FIG. 1 is a partial schematic view of an apparatus for producing a first-aid bandage using the application apparatus of this example.

The long adhesive film a wound on the reel 1a reaches the film transfer device 1 through several rollers, and the release paper a'on the adhesive surface side is continuously peeled off by the pinch roller 1 ', The adhesive surface is continuously transferred in the unwinding direction with the surface appearing.

Reference numeral 1b is a spare reel to be replaced when the adhesive film a on the reel 1a is used up.

In this embodiment, the adhesive film a used has an original width of 75 mm, and the transfer device 1 sets the transfer speed to 19 m / min.

The long pad material b'is stacked in the storage box 2a in a folded state, and is continuously received from the upper end through the roller group and the heating iron 2b to the rotary die cutter 2 having a continuous cutting function.

The pad material b'in this embodiment has an original width of 24 mm and the transfer speed of the rotary die cutter 2 is set to 12 m / min.

The heating iron 2b is in a roll shape, and the pad material b'is sandwiched between the pressure iron rolls 2c and 2d having other small diameters to be fed out, and the folds and wrinkles attached to the pad material b'are extended. These small-diameter rolls 2c, 2d are constructed so as to avoid the baking of the pad material b'by retracting laterally from the position of press contact with the iron 2b when the entire apparatus is stopped.

In the rotary die cutter 2 in this embodiment, the pad material b'is continuously cut to a fixed size (12 mm interval) at the contact position with the roll 21 rotating counterclockwise in FIG. Is continuously transferred to the delivery position B to the cyclic transfer device 3 described later.

That is, in the rotary die cutter 2, as shown in FIGS. 2 and 3, a cylindrical body that rotates clockwise in FIG.
Cutting blades 22 are continuously formed at a constant angular interval on the circumference of 20,
The body 20 and the roll 21 (the first contact) that rotate symmetrically and contact
(Fig.) Sandwiches a long pad material b ', and each time the cutting blade 22 of the body 20 contacts the peripheral surface of the roller 21 of Fig. 1, the pad material b'is cut into a fixed size pad b.

The body 20 has a thick-walled cylindrical shape, both inner ends of which are fixed to the rotating shaft 202 through the collar 201 as shown in FIG. 3, and one end surface of the body 20 is connected to a ring-shaped vacuum cylinder 24 fixed to a member (not shown). It is configured to rotate integrally with the rotary shaft 202 in a state of slidingly contacting with air through the rings 203, 203.

A proper number of suction holes 23 are formed between the cutting blades 22 of the body 20.
And the vacuum groove 241 of the vacuum cylinder 24, the ring 203, 2
The portions between 03 are communicated with each other via the vacuum passage 231.

Then, the pad b cut continuously as described above is
The cutting blades 22 are sequentially held by suction and transferred to the delivery position a, and the vacuum cylinder 24 is delivered at the delivery position a.
When the vacuum groove 241 reaches the end, suction to the pad b is sequentially stopped and the pad b is transferred to the transfer piece 30 of the cyclic transfer device 3 described later.

In this embodiment, the peripheral speed of the rotary die cutter 2 is set to 12 m / min, which is the same as the feeding speed of the pad material b ', and the intervals between the cutting blades 22 are set to 12 mm.

The patrol transfer device 3 of this embodiment includes a transfer piece 30 composed of a large number of rod-shaped cams that circulate on a predetermined orbit in a posture parallel to the rotation shaft 31 by the rotation of the rotation shaft 31.

These transfer pieces 30 are configured as follows, so that they rotate counterclockwise in FIG. 2 and sequentially pass through the transfer position B of the pad b to gradually increase the transfer speed while the pad b moves. At the sticking position (b), it is close to the transfer surface (the sticking position (b) of the pad) of the lower sticking film transfer device 1, and then gradually lowers the transfer speed from a certain position and returns to the upper transfer position (i) again. To do.

Plate-shaped cam guides 32, 32 are fixed to both ends of the rotary shaft 31 so as to rotate integrally, and each cam guide 32, 32 has the same number of guide slits as the transfer piece 30 at a constant angular interval.
321 are radially formed.

In the guide slit 321 of each cam guide 32, one transfer piece 30 is guided exclusively in a movable state only in the inner and outer peripheral directions (that is, in a state where it does not rotate).

A pair of cam bases 33, 33 fixed to the machine frame 11 are installed on the outer sides of the cam guides 32, 32. A cam groove 331 for forming a circular orbit of the transfer piece 30 is formed on the opposing surfaces of each cam base 33, and the cam grooves 331 of the cam bases 33, 33 have both end portions of each transfer piece 30 resistant to each other. It is slidably guided through a bush 311 made of a wear-resistant low-friction member.

Therefore, each transfer piece 30 circulates in the above-described circular orbit while changing the peripheral speed as the rotary shaft 31 rotates counterclockwise in FIG.

As shown in an enlarged view in FIG. 4, a pad holding portion 303 is fixed to each of the transfer pieces 30 by a tubular screw 304 in a state of slightly protruding in the outer peripheral direction at a central portion. Each suction hole 301 formed in this pad holding portion 303 communicates with the vacuum groove 332 at the bottom of the cam groove 331 in one cam base 33 via the vacuum passage 302 formed from one end of the transfer piece 30. There is. As shown in FIG. 2, the vacuum groove 332 is formed at the bottom of the cam groove 331 of one cam base 33 from the delivery position a to the pad attaching position b, and communicates with a vacuum suction means (not shown). There is.

Each transfer piece 30 is provided with a pair of hook-shaped pressing pieces 305 which can be erected up and down so as to be located on both sides of the pad holding portion 303.

As shown in FIG. 4, the pair of holding pieces 305 are provided with slide cams 307 controlled by ring-shaped cams 34 fixed to a machine frame (not shown) on both sides of the front side of each transfer piece 30.
Pad holding part by being raised and lowered by
It is strongly pressed against both sides of 303.

That is, the transfer pieces 3 are provided on both sides of the pad holder 303.
Guide cylinders 306, 306 are fixed along 0, and each guide cylinder
Each slide rod 307 that slides along the surface of the transfer piece 30 is held by 306. Each slide rod 307
Pins 308 are attached to the opposite ends of the
08 is guided to each holding piece 305 through a long hole 309 formed obliquely. Each slide rod 307 is urged laterally by a return spring 310 in the guide cylinder 306, and the outer ends thereof are ring-shaped cams 34 ( (Fig. 3). As shown in FIG. 3, the opposing cams 34 are formed with projecting portions 341 that project in opposite directions from the transfer position 30 of each transfer piece 30 to the pad attachment position b of the pad. Therefore, each pressing piece 305 is tilted as described above in the process in which the transfer piece 30 moves in the range.

In the apparatus of this embodiment, each transfer piece 30 has a body 20 of the rotary die cutter 2 near the delivery position B.
In the process of moving at the same peripheral speed as the peripheral speed, sucking the pad b from the die cutter 2 at the delivery position a, receiving it in the pad holding portion 303, and moving in the direction of the pad attachment position b, When the slide rods 307 are laterally pushed by the protruding portions 341 of the cams 34 facing each other, the holding pieces 305 stand up and hold the pad b firmly sandwiched between it and the pad holding portion 303.

When each transfer piece 30 further moves to the pad attaching position B,
The transfer piece 30 gradually slides along the cam groove 331 and the guide slit 321 in the outer peripheral direction to increase the moving speed, thereby gradually and forcibly separating the adjacent pads b before and after the transfer direction. The transfer piece 30 transfers the adhesive film a 1 while the transfer piece 30 moves to the pad attaching position b of the pad closest to the transfer surface of the adhesive film a transfer device 1.
Align with the transfer direction of.

When the pad material b'is cut by the cutting blade 22, the adjacent pads b are not completely separated from each other, and the adjacent pads b are connected by a part of the thin fibers of the non-woven fabric which is the material of the pad material b '. Even in this case, the adjacent transfer pieces 30 are completely separated by pulling the pad b away from each other as described above.

In this embodiment, while each transfer piece 30 moves to the sticking position (b) closest to the transfer surface of the transfer device 1 of the adhesive filter a, the transfer speed of the transfer film 1 becomes the same as the transfer speed of the adhesive film a. The distance between the pads b being held and transferred by the transfer pieces 30 adjacent to each other is
It is designed so as to match the attachment interval of the pad b to the.

The slide rod 307 reaches the end of the projecting portion 341 of the ring-shaped cam 34 by the time the transfer pieces 30 reach the sticking position b of the pad adjacent to the transfer surface of the film transfer device 1, and the return spring 310 is used. Simultaneously with the slide rod 307 retreating to the side, the pressing piece 305 falls to the side and the pinching of the pad b is released. At the attaching position (b), the pad holding portion 303
When the suction of the pad b is released by the suction hole 301, the pad b is attached to the adhesive surface of the adhesive film a running below with the fiber layer of the pad b exposed on the surface.

According to the above embodiment, length = 24 mm and width w as shown in FIG.
The 12 mm pad b could be continuously applied along the longitudinal center of the adhesive film a having a width of 75 mm at an interval of about 7 mm at a speed of 1000 sheets / minute.

The transfer device 1 for the adhesive film a in this embodiment has a cylindrical shape as shown in FIG. 2 and FIG.
Is fixed to the rotary shaft 12 via the second rotary shaft 12 together with the second rotary shaft 12.
Rotate clockwise.

Further, the transfer device 1 of this embodiment is in contact with a vacuum cylinder 14 fixed to the machine frame 11 on one side, and suction holes 15 formed at predetermined intervals in the outer peripheral direction of the vacuum cylinder 14 are provided. Since it is in air-tight communication with the vacuum groove 141, the adhesive film a is continuously transferred with the non-adhesive surface side being suction-held.

As shown in FIG. 5, the adhesive film a to which the pads b are attached at regular intervals is transferred continuously by the adhesive device 4 of the release sheet including the pinch rollers 41 and 42 while being continuously transferred.
The long release sheets c and d are adhered to the adhesive surface side while being partially overlapped on the pad b, and are sequentially formed on the composite film e.

To adhere release sheets c and d as described above, use roller 41
It is also possible to carry out by pressing the rear part of the sticking position B in the transfer device 1.

For example, in some cases, it may be preferable that the pad b is attached to a position deviated from the center of the adhesive film a depending on the attachment site on the skin of the body. In such a case, the die cutter 2 and the patrol device are used. The center of the transfer surface of the pad No. 3 is shifted from the center of the transfer surface of the transfer device 1 by a necessary amount.

In the above-described embodiment, the transfer speed of the pad b by the transfer piece 30 of the cyclic transfer device 3 is set until the transfer piece 30 reaches the sticking position b closest to the transfer surface of the transfer apparatus 1. Although the transfer speed of the transfer device 1 is faster than the transfer speed of the cyclic transfer device 3, the transfer speed of the pad 1 and the transfer speed of the devices 1 and 3 is greatly different. Without it, it is not necessary to perfectly synchronize the transfer rates of both.

In this case, the sticking interval of the pad b is increased only because the transfer speed of the patrol transfer device 3 is slow.

Further, the transfer device 1 is configured to suck and transfer the adhesive film a, but if the adhesive film a does not touch the left and right in the transfer direction during transfer, the transfer is always performed by suction. It does not need to be structured. For example,
In the case of a structure in which the peeling sheets c and d are adhered to the adhesive sheet a by the pinch rollers 41 and 42 as shown in the drawing and is pulled at a constant speed, the adhesive paper a ′ is peeled off from the adhesive film a. When the film a is sandwiched between the rolls 16 on the peripheral surface of the transfer device 1, a shallow groove (not shown) for guiding the adhesive film a is formed on the peripheral surface of the transfer device 1,
It can also be carried out by configuring the adhesive film to run in the groove.

[Advantages of the Invention] According to the pad continuous sticking method and the continuous sticking apparatus of the present invention, in the process of continuously transferring the adhesive film and the pad cut to a certain size, the pads are sequentially adhered to the adhesive film. Therefore, as compared with the pasting method and pasting device by intermittent operation, the speed can be significantly increased, and mechanical noise and wear of parts are extremely small.

Moreover, even if the fibers that are the materials for them are not completely separated and are partially connected, the adjacent pads that have been cut are forcibly separated before being attached to the adhesive film. Also in, the pads can be smoothly attached to the adhesive film one by one.

[Brief description of drawings]

FIG. 1 is a partial schematic view of a state where the sticking device according to the embodiment of the present invention is used in a continuous manufacturing apparatus for emergency bandages, FIG. 2 is an enlarged side sectional view in which a part of the sticking device is omitted, and FIG. Two
4 is an enlarged vertical sectional view in which a part of the apparatus of FIG. 4 is omitted, FIG. 4 is an enlarged sectional view of a transfer piece in a cyclic transfer apparatus, and FIG. FIG. Explanation of symbols in the figure a ... Adhesive film, a '... Release paper, b ... Pad,
b '... Pad material, c, d ... Release sheet, e ... Composite film, A ... Delivery position, B ... Pad attachment position 1 ... Adhesive film transfer device, 11 ... Machine frame 12 ... … Rotation axis, 13 …… Rotation axis 14 …… Vacuum cylinder, 15 …… Suction hole 2 …… Rotary die cutter, 21 …… Roll 20 …… Cylindrical body, 201 …… Color 202 …… Rotation axis, 203 ...... Ring 22 …… Cut blade, 23 …… Suction hole 24 …… Vacuum cylinder, 241 …… Vacuum groove 231 …… Vacuum path, 3 …… Circulating transfer device 30 …… Transfer piece, 301 …… Suction hole 302… … Vacuum path, 303 …… Pad holder 304 …… Tubular screw, 305 …… Pressing piece 306 …… Guide tube, 307 …… Slide rod 308 …… Pin, 309 …… Oval hole 310 …… Return spring, 31… … Rotary shaft 311 …… Bush, 32 …… Cam guide 321 …… Guide slit, 33 …… Cam base 331 …… Cam groove, 332 …… Vacuum groove 34 …… Cam, 341 …… Projection part 4 …… Peeling sheet adhesive device, 41,42 …… Pinch roller

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-61-162462 (JP, A) JP-A-62-93178 (JP, A) JP-A-62-31662 (JP, A) JP-B-35- 16646 (JP, B1)

Claims (5)

[Claims] 1. A step of sequentially cutting a long pad material into a pad having a predetermined size while continuously transferring it in a suction state, and sequentially sucking and holding each pad in a fixed posture and continuously transferring the pad material. By gradually increasing the transfer speed in a tightly sandwiched state, a step of separating the pads adjacent to each other in the front and rear, and a long adhesive film being fed out and transferred while the adhesive surface appears on the surface while further transferring the pad. A step of bringing the adhesive surface closer to the adhesive surface in the same direction as the transfer direction of the adhesive film, and a step of sequentially releasing the pad at the proximity position and attaching the pad to the adhesive surface. Continuous pad attachment method for the. 2. In the step of bringing the pad into close proximity to the adhesive surface of the long-length adhesive film which is being fed out and is being transferred, in the state of being coincident with the transfer direction of the adhesive film, the transfer speed of the pad is The method for continuously applying a pad to an adhesive film according to claim 1, which is synchronized with the transfer speed. 3. A film transport device for continuously transporting a long adhesive film in a certain direction with an adhesive surface exposed on the surface, and a long pad material sucked and held to a predetermined speed lower than the film transport device. A rotary die cutter that cuts into a pad of a predetermined size while transferring to the delivery position, and the film transfer device that sequentially receives the pads at the delivery position in synchronization with the transfer speed of the rotary die cutter, and then sequentially increases the speed. A transfer device comprising a plurality of independent transfer pieces that are close to the transfer surface in a state in which the transfer direction coincides with the transfer surface, and after the approach, sequentially reduce the transfer speed and return to the delivery position to make a circular orbit. The piece includes a pad holding portion having a suction hole, and a holding piece that is arranged on a side portion of the pad holding portion and that can be raised and lowered toward the surface of the pad holding portion. The suction hole of the pad holding portion is communicated with the vacuum suction means from when the transfer piece reaches the transfer position to when the transfer piece approaches the transfer surface of the film transfer device or when the transfer piece approaches the transfer surface. After the suction hole of the pad holding portion of the transfer piece communicates with the vacuum suction means, the pressing piece stands upright and is pressed against the surface of the pad holding portion before the transfer speed is increased, and the transfer piece is transferred. A continuous sticking of a pad to an adhesive film, which is characterized in that the pad is tilted and separated from the surface of the pad holding portion until it comes close to the transfer surface of the film transfer device after being separated from a subsequent transfer piece at an increased speed. apparatus. 4. A pair of rotating cam guides in which each transfer piece of the cyclic transfer device is constituted by a rod-shaped cam, and the cyclic transfer device has radially formed guide slits of the same number as the transfer pieces at a constant angular interval. And a cam base fixedly installed on the outer side of each cam guide and having a cam groove formed on a side surface facing the cam guide, the cam groove coinciding with the orbit of the transfer piece. Guiding the transfer pieces so as to be movable only in the circumferential direction, slidably inserting both ends of each transfer piece into the corresponding cam grooves of the cam base, and the cam guides in the transfer direction of the pad by the transfer pieces. The pad sticking device for the adhesive film according to claim 3, wherein the pad sticking device is rotated. 5. The bottom of the cam groove of one of the cam bases corresponds to the circular orbit of the transfer piece from the transfer position until the transfer piece is close to or near the transfer surface of the film transfer device. 5. The continuous sticking of the pad to the adhesive film according to claim 4, wherein a vacuum groove is formed, and each transfer piece has a vacuum path for communicating the vacuum groove with the suction hole of the pad holding portion. apparatus.