JP4553249B2 - Bonding device - Google Patents

Description

  This invention relates to the bonding apparatus which bonds a protective film on the surface of a resin sheet, and relates in detail to the bonding apparatus which bonds a protective film on the surface of the resin sheet shape | molded continuously and sent out.

Forming a resin material such as an acrylic resin into a continuous sheet by an extrusion molding method is widely performed. A protective film is attached to the resin sheet molded by such a method in order to prevent the surface from being scratched.
Conventionally, affixing of a protective film, that is, affixing of a protective film to the surface of a molded resin sheet is performed by pressing the protective film onto the upper surface and the lower surface of the resin sheet with a pair of bonding rolls, respectively. (For example, refer to paragraph [0011] of JP-A-2001-62916 (Patent Document 1)).

  By the way, in the pasting device, when it becomes necessary to interrupt the pasting of the protective film, for example, when the quality of the resin sheet becomes temporarily unstable, there is no commercial value. There is no need to paste. Therefore, after the protective film is cut once and the quality of the resin sheet is stabilized to a desired quality, it is necessary to set the protective film on the bonding roll so that the protective film is bonded again.

In the conventional bonding apparatus, processing such as cutting of the protective film and setting for rebonding has been performed manually by an operator. Or in order to avoid a complicated operation | work, the interruption | blocking of the bonding of a protective film may not be performed.
JP 2001-62916 A

As described above, in the conventional bonding apparatus, when the bonding of the protective film is temporarily interrupted, the worker has to work manually, so it is desired to automate such work. It was.
This invention was made based on such a background. In an apparatus for bonding a protective film to the surface of a resin sheet that is continuously molded, the temporary interruption of the protective film and re-bonding are performed. The main purpose is to provide a bonding apparatus capable of automatically performing processing.

  Moreover, this invention aims at enabling it to prevent useless use of a protective film in the bonding apparatus.

  Invention of Claim 1 is an apparatus which bonds a protective film to the surface of the resin sheet continuously shape | molded, Comprising: At least one of the upper side or the lower side of the path | route of the said resin sheet shape | molded and sent out A bonding roll for bonding a protective film to a resin sheet that is provided and delivered through the passage, and a cutter for cutting the protective film provided on the downstream side of the passage from the position of the bonding roll The bonding state in which the bonding roll is pressed against the resin sheet sent out from the apparatus and the passage and the protective film is bonded to the surface of the resin sheet, and the protective sheet is separated from the resin sheet and the bonding roll. Switching means for switching the operating state to an open state not bonded to the surface of the sheet, and means for driving the cutter device when the switching means is in the open state. Preparative a laminating apparatus according to claim.

According to a second aspect of the present invention, the cutter moves symmetrically in the width direction of the passage, and is inclined from the center of the passage toward the left and right sides by a predetermined angle with respect to the direction perpendicular to the passage toward the downstream side of the passage. The bonding apparatus according to claim 1, further comprising a cutting blade that moves to a position.
The invention according to claim 3 is characterized in that the bonding roll includes a pair of an upper bonding roll and a lower bonding roll that form a pair provided above and below the passage. It is a combined device.

According to a fourth aspect of the present invention, the switching means is provided on the upstream side of the passage from the position of the upper bonding roll and the position of the upper and lower bonding roll, and below the passage. The bonding apparatus according to claim 3, further comprising a push-up roll for lifting the resin sheet sent out through the passage.
According to a fifth aspect of the present invention, the cutter device is provided above the passage, and an upper cutter for cutting the upper protective film, and a lower cutter provided below the passage and for cutting the lower protective film. It is a bonding apparatus of Claim 3 or 4 characterized by including a cutter.

  According to the first aspect of the present invention, the operation of the apparatus is switched between the bonding state in which the protective film is bonded to the surface of the resin sheet and the open state in which the protective film is not bonded to the surface of the resin sheet. The state can be switched. And in an open state, a cutter apparatus is driven by a drive means, and a protective film is cut | disconnected. In other words, when it is no longer necessary to bond a protective film to the surface of the resin sheet, or when temporarily stopping the bonding of the protective film to the surface of the resin sheet, the switching means opens the state of the device. Switch to. In an open state, since the resin sheet and the bonding roll are separated from each other, the protective film bonded by the bonding roll is not bonded and is lifted from the surface of the resin sheet. In this state, the cutter device is driven and the protective film is cut.

Therefore, the protective film is not unnecessarily bonded to the resin sheet portion that does not need to be bonded to the surface.
Since the cutter device is located on the downstream side of the passage with respect to the bonding roll, the cut edge (tip edge) of the protective film cut by the cutter device extends from the bonding roll to the downstream side of the passage.

And when resuming bonding, a bonding roll is pressed on the resin sheet surface. At that time, between the surface of the resin sheet and the bonding roll, since there is a protective film extending from the bonding roll to the downstream side of the passage, the bonding roll is pressed against the resin sheet surface, Bonding of the protective film to the resin sheet surface is resumed.
As described above, the present invention includes the switching unit, the cutter device, and the driving unit thereof, so that the protective film is bonded to the surface of the resin sheet, the bonding is interrupted, and the protective film is cut. The resumption of bonding can be performed automatically.

According to invention of Claim 2, when the width | variety of the resin sheet shape | molded and sent out is wide, the width | variety of a protective film also becomes large according to it, but a cutter is left-right symmetric toward the left-right direction from the center of a channel | path. Since it moves and cut | disconnects a protective film, the cutting | disconnection time can be about a half time compared with moving and cutting from one end to the other in the width direction.
Moreover, since the cutting direction is inclined forward by a predetermined angle with respect to the width direction (perpendicular to the passage), the cut edge of the protective film after being cut is straight in the width direction (perpendicular to the passage). it can. Therefore, when resuming bonding, the rate at which waste is generated at the tip of the protective film can be reduced.

According to invention of Claim 3, a protective film can be bonded with respect to the upper and lower surfaces of the resin sheet sent out a channel | path, respectively, and the interruption | blocking can be performed when bonding is unnecessary.
According to invention of Claim 4, a switching means can be implement | achieved by a simple structure with the means to displace an upper bonding roll up and down, and a raising roll.
More specifically, the switching means displaces the upper laminating roll with respect to the resin sheet sent out from the passage in a state of rotating and contacting the upper surface of the sheet with a predetermined pressure, for example, by its own weight. Switch to the state of not touching the upper surface of the sheet. In a state where the upper bonding roll does not contact the upper surface of the resin sheet, the upper protective film that is supplied to the upper bonding roll and exists between the upper bonding roll and the upper surface of the resin sheet is the upper surface of the resin sheet. It will be in the state where it floated from the upper surface of the resin sheet.

  In a state where the upper bonding roll is displaced upward, the switching means further displaces the push-up roll upward. The push-up roll is located on the upstream side of the passage and below the passage from the position of the upper and lower laminating rolls. Supports the resin sheet. When this push-up roll is displaced upward, the resin sheet is lifted by the push-up roll. As a result, the resin sheet sent out through the passage rises from the lower bonding roll. Therefore, in this state, the lower protective film cannot be bonded by the lower bonding roll.

The lower laminating roll is configured to receive the weight of the upper laminating roll. In this invention, the lower laminating roll is a fixed roll, and supports the resin sheet sent out from the passage from below. It is supposed to be a roll.
If it is going to make the structure which can displace the lower bonding roll which concerns concerned up and down, a structure will become a big thing. Therefore, as in this invention, only the upper laminating roll can be displaced up and down, and in order to release the resin sheet from the lower laminating roll, the entire laminating apparatus is realized by a relatively small roll called a push-up roll. The enlargement of the configuration can be suppressed.

But the structure of the switching means of Claim 4 specifies the more preferable form, The switching means of this invention displaces an upper bonding roll up and down, and displaces a lower bonding roll up and down. It may be a configuration.
In the above description, the upper bonding roll is described as holding the resin sheet by its own weight. However, the upper and lower pair of bonding rolls sandwich the resin sheet with a predetermined pressure by an elastic member such as compressed air or a spring. It may be configured to nip.

According to the invention of claim 5, since the cutter device includes the upper cutter for cutting the upper protective film and the lower cutter for cutting the lower protective film, the upper protective film and the lower protective film are individually provided. Can be cut into pieces.
Moreover, the position of an upper cutter and the position of a lower cutter should just be the downstream of a channel | path rather than the position of an up-and-down bonding roll, and do not necessarily need to be provided in the up-down direction. Therefore, the upper cutter and the lower cutter can be respectively arranged at positions optimal for cutting the upper protective film and the lower protective film.

  As described above, according to the present invention, the protective film is bonded to the surface of the resin sheet, the bonding is temporarily suspended, and when the bonding is resumed, those operations can be automatically performed. It can be set as the bonding apparatus which can eliminate the waste of a protective film.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1: is the top view which looked at the resin sheet delivery channel | path provided with the bonding apparatus 1 which concerns on one Embodiment of this invention from upper direction, FIG. 2 is the longitudinal cross-sectional view. Further, FIG. 3 is a front view showing the cutter device.
Referring to FIGS. 1, 2, and 3, bonding apparatus 1 is inserted between upstream side passage 2 and downstream side passage 3. The upstream passage 2 and the downstream passage 3 are each constituted by a roll conveyor having a plurality of rolls 4 and 5. Each of the rolls 4 and 5 is disposed such that its axis extends in a direction perpendicular to the longitudinal direction of the passage and extends horizontally. And from the upstream side of the upstream channel | path 2, the resin sheet continuously shape | molded by the extrusion method is sent out. A continuous resin sheet passes the bonding apparatus 1 from the upstream channel | path 2, and, thereby, a protective film is bonded by the upper surface and the lower surface. Then, it is sent to the next processing section through the downstream passage 3.

  In the laminating apparatus 1, the upper laminating roll 7 and the lower laminating roll 8 provided on the upper and lower sides of the passage 6 of the resin sheet to be sent, and the upstream side of the passage 6 relative to the upper and lower laminating rolls 7 and 8 A push-up roll 17 that is to be moved, and a cutter device 25 that is located downstream of the passage 6 are provided. The upper and lower laminating rolls 7 and 8 both extend in the horizontal direction in the direction in which the rotation axis is orthogonal to the passage 6. And a roll pair is comprised by the upper bonding roll 7 and the lower bonding roll 8, nips the resin sheet which passes the channel | path 6, and sends it downstream.

  Both ends of the upper bonding roll 7 and the lower bonding roll 8 are rotatably supported by support frames 9 and 10 provided on both sides of the passage 6. And in this embodiment, the lower bonding roll 8 is supported as a fixed roll, and the upper bonding roll 7 is supported as a roll which can be displaced up and down. When the force to displace upward is removed, the upper bonding roll 7 is lowered onto the lower bonding roll 8 and is bonded to the resin sheet passing through the passage 6 by the weight of the upper bonding roll 7. A constant nip pressure can be applied together with the combined roll 8. The mechanism for driving the upper bonding roll 7 upward is realized by, for example, an air cylinder or a hydraulic cylinder. The upper bonding roll 7 can be displaced upward with respect to the support frames 7 and 8 by the cylinder.

An upper protective film 10 is supplied between the upper bonding roll 7 and the passage 6. The upper protective film 10 is guided by the guide rolls 11 and 12, wraps clockwise in FIG. 2 with respect to the upper bonding roll 7, and moves from the lower peripheral surface of the upper bonding roll 7 to the downstream of the passage 6. To be sent.
A lower protective film 13 is supplied between the lower bonding roll 8 and the passage 6. The lower protective film 13 is guided by the guide rolls 14, 15, 16, wraps counterclockwise in FIG. 2 with respect to the lower bonding roll 8, and flows from the upper peripheral surface of the lower bonding roll 8 to the downstream of the passage 6. Sent to move.

Therefore, when the upper bonding roll 7 is displaced downward and the upper bonding roll 7 and the lower bonding roll 8 are in the nip state, the resin sheet sent out along the passage 6 between the upper and lower bonding rolls 7 and 8. The upper protective film 10 and the lower protective film 13 are pressure-bonded and attached to the upper surface and the lower surface, respectively.
The pasting device 1 is usually in the pasting state as described above, and the protective films are pasted on the upper and lower surfaces of the resin sheet sent out through the passage 6, respectively. Of the resin sheet to be sent out, during the period unsuitable for providing as a product, the resin sheet is only sent out, and the protective film is stuck on the upper and lower surfaces of the sent resin sheet. Is done. Such a situation can be exemplified by a portion in the middle of a change from the previous grade to the later grade when the grade of the resin sheet is switched. For example, when switching the thickness of the resin sheet, when switching the color of the resin sheet, and the like, even when the grade of the resin sheet is being switched, the resin sheet continuously formed by extrusion molding is interrupted. Instead, it is sent from the upstream passage 2 to the downstream passage 3.

Therefore, while the resin sheet unsuitable as a product passes through the passage 6, the upper protective film 10 and the lower protective film 13 are not bonded as described below.
First, the upper bonding roll 7 is displaced upward. Since this has the support structure which the upper bonding roll 7 can displace up and down, it performs using the support structure. When the upper bonding roll 7 is displaced upward indicated by 7 a in FIG. 2, the nip between the upper bonding roll 7 and the lower bonding roll 8 is released, and the path from the upper bonding roll 7 to the passage 6. The supplied upper protective film 10 is in a state of being lifted from the passage 6 on the downstream side of the upper bonding roll 7.

  Further, the upper bonding roll 7 is displaced upward, and the push-up roll 17 is displaced upward. As described above, the push-up roll 7 is provided on the upstream side of the passage 6 relative to the positions of the upper and lower bonding rolls 7 and 8 and on the lower side of the passage 6. The push-up roll 17 functions as a support roll that supports the lower surface of the resin sheet sent out through the passage 6 in a state where the push-up roll 17 is not displaced upward.

  When the push-up roll 17 is displaced upward, the resin sheet that is being sent out is pushed upward from the passage 6 (for example, pushed upward by about 30 to 75 mm). As a result, a part of the resin sheet being sent out is lifted from the passage 6 by the action of the push-up roll 17, and as a result, the contact with the lower bonding roll 8 is released. When the contact with the lower bonding roll 8 is released, the lower protective film 13 supplied by the lower bonding roll 8 is separated from the lower surface of the resin sheet. In this state, the resin sheet continues to be sent out.

The displacement of the push-up roll 17 is performed by an air cylinder or a hydraulic cylinder.
On the other hand, after the upper protective film 10 and the lower protective film 13 were lifted from the upper surface and the lower surface of the resin sheet (after leaving), they were provided downstream of the passage 6 from the position of the upper and lower laminating rolls 7 and 8. The upper protective film 10 and the lower protective film 13 are cut by the cutter device 25, that is, the upper cutter 18 and the lower cutter 19, respectively.

  As shown in FIGS. 1 and 3, the upper cutter 18 includes a pair of traveling cylinders 20 extending horizontally from the center in the width direction of the passage to the left and right sides. Each traveling cylinder 20 includes a slide base 21 that slides in the length direction of the travel cylinder 20 (the width direction of the passage), a lift cylinder 22 that is fixed to the slide base 21, and a lift cylinder 22. And a cutting blade 23 disposed at the lower end of the. The lifting cylinder 22 can move the cutting blade 23 up and down, and displaces the cutting blade 23 to the lowered cutting position and the raised non-cutting position. Then, with the cutting blade 23 lowered to the cutting position by the lifting cylinder 22, the sliding base 21 is moved symmetrically from the center in the width direction of the passage to the left and right by the traveling cylinder 20. The protective film 10 is cut from the center in the width direction toward both left and right sides.

  In this case, since the front-end | tip part of the upper protective film 10 is bonded by the resin sheet sent out, the upper protective film 10 is moving to the channel | path downstream side also during cutting | disconnection. Therefore, as shown in FIG. 1, if the traveling cylinder 20 is disposed so as to be inclined at a predetermined angle from the center in the width direction of the passage toward the side of the passage, the cutting blade 23 extends laterally from the center of the passage. The upper protective film 10 also moves while moving toward the front, and the cut end edge of the film 10 is in a direction orthogonal to the width direction of the passage.

The configuration of the lower cutter 19 is also the same as the configuration of the upper cutter 18, except that the configuration is symmetrical in the vertical direction as compared with the upper cutter 18.
In this embodiment, the cutter device 25 has the upper cutter 18 and the lower cutter 19 and each has a symmetrical mechanism that moves from the center of the passage toward the left and right sides.

However, the cutter device 25 is not limited to such a configuration. For example, the cutter device 25 may have a cutting edge that moves from one end in the width direction of the passage to the other end. Or it can also comprise by what is called a rotary cutter which has a helical blade in the surrounding surface of the cylindrical body long in the width direction of the channel | path.
Moreover, in the above-mentioned embodiment, the apparatus which can paste a protective film (upper protective film and lower protective film) simultaneously on the upper surface and lower surface of the resin sheet was demonstrated. However, this invention can also be comprised as an apparatus which can paste a protective film only on the upper surface of a resin sheet, or only on the lower surface.

  In addition, the present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the claims.

It is the top view which looked at the sending way of the resin sheet which has pasting device 1 concerning one embodiment of this invention from the upper part. It is a longitudinal cross-sectional view of the structure of FIG. 3 is a front view of the cutter device 25. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bonding device 6 Passage 7 Upper bonding roll 8 Lower bonding roll 10 Upper protective film 13 Lower protective film 17 Push-up roll 18 Upper cutter 19 Lower cutter 20 Traveling cylinder 21 Slide base 22 Lifting cylinder 23 Cutting blade 25 Cutter apparatus

Claims (5)

An apparatus for bonding a protective film to the surface of a continuously molded resin sheet,
A bonding roll that is provided on at least one of the upper side or the lower side of the passage of the resin sheet that is molded and sent, and for bonding a protective film to the resin sheet that is sent through the passage;
A cutter device for cutting a protective film provided on the downstream side of the passage from the position of the bonding roll;
The bonding state in which the bonding roll is pressed against the resin sheet fed out of the passage and the protective film is bonded to the surface of the resin sheet, and the protective film is the surface of the resin sheet after the resin sheet and the bonding roll are separated. Switching means for switching the operating state to an open state that is not bonded to,
Means for driving the cutter device when the switching means is in an open state;
The bonding apparatus characterized by including.   The cutter includes a cutting blade that moves symmetrically in the width direction of the passage and moves in a direction inclined toward the downstream side of the passage by a predetermined angle with respect to a direction orthogonal to the passage from the center of the passage toward both left and right sides. The bonding apparatus according to claim 1, wherein:   The said bonding roll contains the upper bonding roll and the lower bonding roll which make the pair provided in the upper and lower sides of the said channel | path, The bonding apparatus of Claim 1 or 2 characterized by the above-mentioned. The switching means is
Means for displacing the upper laminating roll up and down;
4. A push roll for lifting a resin sheet that is provided on the upstream side of the passage from the position of the upper and lower laminating rolls and below the passage and that is fed through the passage. The bonding apparatus as described. The cutter device is provided on a passage, and an upper cutter for cutting the upper protective film;
The bonding apparatus according to claim 3 or 4, further comprising a lower cutter provided under the passage and for cutting the lower protective film.

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