JPH0211316A - Apparatus for lamination - Google Patents

Abstract

PURPOSE:To prepare a laminate workpiece having good finish by providing a scraper stripping an adhesive for lamination squeezed out from the adhesion face of a transparent film when it is heated and processed. CONSTITUTION:An adhesive for lamination squeezed out from the adhesion face of a transparent film when it is heated and pressed by means of rollers 1 and 2 is adhered on the outer face of an endless belt 4 and moved with the endless belt 4. When the part where the adhesive is adhered comes to a contacting position where a scraper 6 is brought into contact with the endless belt 4, a friction force works between a slidably contacting plate 21 and this adhesive to strip the adhesive. In this instance, a bent part 26 of a rod spring 25 pushes a point of the center of the inner face of the slidably contacting plate 21 by its apex, but as a rib 24 is extendedly placed in parallel to the long side on the inner face of the slidably contacting plate 21, this abrasively contacting plate 21 does not warp and a uniform pressing force can be applied on the whole contacting face with the endless belt 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a laminating device for welding a transparent film to the surface of cards such as identification cards and driver's licenses.

[Conventional technology]

Conventionally, as a laminating device for welding a thin layer of transparent film to the surface of cards, for example, the Japanese Patent Laid-Open No. 60
- As shown in Publication No. 58817, an endless belt is wound between the upper and lower rollers of two sets of front and rear rollers, and a heating device is provided inside each endless belt, while a constant pressure is applied to the adhesive surface. Cards to be laminated are sandwiched between two transparent films coated with a laminating adhesive that melts at temperature, and the rollers and
This transparent film is heated and crimped using an endless belt? It is known for things that it can be worn with.

[Problem to be solved by the invention]

However, with such conventional laminating equipment,
The laminating adhesive that is melted and crushed when the laminated product is heated and pressurized and protrudes from the transparent film adheres to the surface of the endless belt and moves in circular motion as the endless heald moves. Therefore, when processing the next laminated product using the part of the endless belt where the laminating adhesive has adhered, the laminating adhesive will adhere to the surface of the transparent film, staining the surface and causing a poor finish. There was a drawback that it became .

In addition, if there is a large amount of laminating adhesive that has protruded, the laminating adhesive that has adhered to the endless belt will solidify as it moves away from the heating area, so the adhesive force between the upper and lower endless belts will increase. There is also the disadvantage that jamming of the laminating machine is likely to occur, as this may put a strain on the roller drive device, or the laminated product may become glued to the endless belt and become caught in the machine. Ta.

This invention was made in consideration of these points, and the purpose of this invention is to prevent the surface of laminated products from becoming dirty due to adhesion of laminating adhesive that protrudes from the transparent film during heating and pressurization. The object of the present invention is to provide a laminating device that can prevent such problems and thereby produce laminated products with a good finish.Furthermore, the purpose is to prevent jamming by avoiding adhesion between endless belts or between endless belts and laminated products. The purpose of the present invention is to provide a laminating device that is difficult to cause damage.

[Means to solve the problem]

In this invention, two sets of endless belts are supported in parallel between a roller on the entrance side and a roller on the exit side, and are arranged so that the upper and lower endless belts come into contact with each other on the outward path. In addition, in the laminating apparatus, a heating device for heating the endless belt is provided, and the laminating device heats and pressurizes the laminated product at the contact moving part of the endless belt, and a scraper for stripping the laminating adhesive is placed on the outer surface of the endless belt. This problem has been solved by configuring a laminating device that is in sliding contact with the laminate.

Also, a sliding contact plate that slides in contact with the endless belt, ears on the sliding contact plate that are erected at both ends of the endless belt in the width direction, elongated holes opened in the ears that are long in the direction away from the endless belt, and long holes at both ends. is engaged with the machine frame, and its inside is penetrated through the long holes of both ears, and is further bent at the center, and this bent part presses the inside of the sliding contact plate toward the endless belt side. The scraper may be configured by a spring and a plurality of ribs extending on the inner surface of the sliding contact plate in the width direction of the endless belt and standing on both sides of the rod-shaped spring in the width direction.

Further, it is preferable that the scraper is placed at a position where the endless belt is sandwiched between the scraper and the roller.

[Effect]

The outer surface of the scraper's sliding contact plate contacts the outer surface of the endless belt and a frictional force is generated between the two, so during the heating and pressurizing stages of the laminated product, the scraper protrudes from the transparent film and adheres to the surface of the endless belt. The laminating adhesive that is used is peeled off by this frictional force. In other words, since the endless belt is wound around the front and rear rows and moves in a circular motion, the adhesive is wiped off by the scraper during this circular movement, and the surface of the upper and lower endless belts that transport the laminated product is Always kept in a clean condition.

Further, when the scraper has the above structure, the following effects occur. In other words, the reference point is the point on the machine frame where both ends of the rod-shaped spring bent at the center are engaged.
This bent portion comes into contact with the inner surface of the sliding contact plate, and further presses the outer surface of the sliding contact plate in the direction of the endless belt. On the inner surface of the sliding contact plate,
Since the ribs extend in the width direction of the endless belt, the strength of the sliding contact plate in the direction perpendicular to the plate surface is increased and warping is prevented. Therefore, although the pressing force from the bent part of the bar spring is applied to one point, it is transmitted to the sliding contact plate across the width of the endless belt without warping, and the entire outer surface is uniformly applied to the endless belt outer surface. be forced to.

Furthermore, if the scraper is placed in a position where the endless belt is sandwiched between the scraper and the rollers, the pressing force from the scraper is supported by the rollers, so the tension on the endless belt does not increase. A strong pressing force can be applied to the

〔Example〕

FIG. 1 is an explanatory diagram showing the structure of an embodiment.

First, the overall configuration of the laminating apparatus will be explained.

Inside the casing 8 of the laminating device, there are a pair of upper and lower inlet rollers 1, an outlet roller 2, and a pair of delivery rollers 3.
so that they are parallel to each other, and the upper and lower rollers are φ(
Both ends of these are engaged with and pivotally supported by the machine frame 7 so as to be in contact with each other. Each of the rollers 1, 2.3 is hollow inside to reduce the weight of the device. An endless belt 4 coated with Teflon is stretched between the upper and lower rollers of the population side roller 1 and the exit side roller 2, respectively. That is, from the above structure, a contact moving part 5 is formed between the entrance roller 1 and the exit roller 2, in which the upper and lower endless belts 4 move in opposing contact with each other over a certain section.

The casing 8 has an insertion port 11 for inserting the laminated product in front of the inlet roller l, and a delivery port 1 immediately after the delivery roller 3 for delivering the laminated product from the device.
2 have been established. An endless belt 4 is placed in front of the insertion port 11.
A table 13 is provided so as to be at the same height as the contact moving part 5.

Further, in the casing 8 below the table 13, there is an inlet roller l and a drive device 1 for rotating the delivery roller 3.
0 is arranged, and the rotational force of this drive device 10 is transmitted to the inlet 4Q+T using a known power transmission mechanism such as a transmission belt mechanism.
70-ra 1 and is transmitted to the delivery roller 3. Furthermore, heating devices 90 for heating the upper and lower entrance rollers 1 are placed in the inner space of the endless belt 4.

Entrance side roller 1. A scraper 6 is brought into sliding contact with each of the exit-side rollers 2 by applying a constant pressure across the endless belt 4.

FIG. 2 is an explanatory diagram showing the structure of the scraper 6. The structure of the scraper 6 will be explained below.

The scraper 6 has a sliding contact plate 21. Ear part 22. and a rod-shaped spring 25.

The sliding contact plate 21 has a rectangular shape, and its long side is connected to the endless belt 4.
It has a dimension that is the same as or longer than the width of.

At both ends of the sliding contact plate 21 in the long side direction, ears 22 are provided vertically to the sliding contact plate 21, and in these ears 22, long holes 23 are formed which are long in the direction away from the sliding contact plate 21. ing. Inside the sliding contact plate 21, two elongated plates processed into a U-shaped cross section are fixed, and four ribs 24 are extended. Rib 24
are erected on the inner surface of the sliding contact plate 21 so as to be parallel to the long sides thereof, and among the ribs 24, the two central ribs connect the bent portions 26 of the rod-shaped springs 25 to the central portion of the sliding contact plate 21 in the width direction. , with a predetermined interval between them. In this embodiment, a side plate 28 is further fixed between the sides of the ears 22 at both ends along the long side of the sliding contact plate 21, and the entire scraper 6 is shaped into a box shape to increase its strength. , it is not always necessary to provide this side plate 28.

Both ends of a rod-shaped spring 25, which is a rod-shaped body bent at the center, pass through the elongated hole 23. Rod-shaped spring 25
Two grooves 25a are provided along the circumference of the rod-shaped body at positions penetrating the elongated hole 23 at both ends of the rod-shaped body, and each groove 25a is formed on both sides of the ear portion 22. Adjust so that it comes out. Then, a long hole 2 is provided in this first groove 25a.
An E-ring 27 having an outer diameter larger than the width of No. 3 is fitted.

That is, although the rod-shaped spring 25 can move up and down along the elongated hole 23, it cannot be removed from the elongated hole 23 because the E-ring 27 is caught. Further, both ends of the rod-shaped spring 25 are passed through holes formed in the machine frame 7. Further than the first groove 25a, two second grooves 25b are provided at both ends of the tip, and the rod-shaped spring 25 is engaged with the machine frame 7 using the E-ring 27 by the method described above. There is.

The bent portion 26 of the rod-shaped spring 25 has its tip slidably connected to the plate 2.
It is brought into contact with the inner surface of 1. The bending angle of the bending portion 26 is adjusted so that the bending portion 26 presses the sliding contact plate 21 and applies a constant pressure to the side surfaces of the rollers 1 and 2, respectively. In this case, the bent portion 26 presses the widthwise center of the sliding contact plate 21 toward the center of the side circle of the rollers 1 and 2, so the sliding contact 'ui21 overlaps on the tangent line of this circle and stops.

Next, the operation of this embodiment will be explained.

The drive device 10 is rotated by turning on a switch (not shown). The rotation of the drive device 1o is transmitted to the upper and lower inlet rollers 1 and the delivery roller 3 by the power transmission mechanism described above, and drives the endless belt 4 wound around the rollers to start this circular movement. Drive device 10
When you turn on the switch, the heating bag is linked to this? ! !
9 is also turned on, activating the heating device 9. The surface of the entrance roller 1 is heated by the heating device 9, and the heat is further conducted to the endless belt 4 wrapped around the upper and lower sides.

Furthermore, if a rotation sensor is attached to the rotating shaft of the inlet roller 1 and a control circuit is provided to turn off the heating device 9 when the sensor stops rotating, the switch can be prevented from being turned off due to an accident such as a workpiece getting caught in the device. Even if the rotation is stopped while the heating device 90 is in the on state, the heating to the inlet side roller 1 is stopped, thereby avoiding scorching of the roller surface and preventing a burnout accident of the roller. In addition, the drive device 10
If a control device is provided between the wires to rotate the inlet roller 1 in the opposite direction for a predetermined period of time until the inlet roller 1 is sufficiently warmed, the workpiece can be inserted while the inlet roller 1 is still at a low temperature.
It is possible to prevent the accident of producing a defective processed product in which the transparent film is not sufficiently welded. Furthermore, if a temperature sensor is attached to the outer surface of the endless belt 4 to detect the temperature, control at the time of starting can be performed more appropriately.

Further, by providing flanges at both ends of each roller 1.2, it is possible to prevent the endless belt 4 from meandering and to circulate it stably. If such a flange is provided,
In order to prevent flanges from interfering with each other and to ensure the bonding between the outer surfaces of the upper and lower endless belts 4, the height of the flanges should be less than the thickness of the endless belt 4, or the flanges should be provided only on one of the upper and lower rollers. , and the width of the roller without flanges must be less than or equal to the width of the roller with flanges minus the thickness of the flange.

After the device is turned on and the entrance roller 1 is sufficiently warmed up, the laminated product is placed on the table 13 and inserted into the device through the insertion port 11.

The laminated product that has entered the inside of the device is caught in the contact area between the upper and lower entrance rollers 1, and is further conveyed toward the exit roller 2 by being sandwiched between the upper and lower endless belts 4 that are wrapped around these. Ru. The surface of the transparent film of the laminated product is heated and pressurized at the same time between the upper and lower entrance rollers 1 via the endless belt 4, so that the adhesive applied to the adhesive surface of the transparent film is bonded. It melts and a transparent film is welded to the cards.

This laminated product is finally pressurized by the exit roller 2 and after the welding is sufficiently performed, the laminated product is transferred to the delivery roller 3.
It is then conveyed out of the apparatus through the outlet 12. In addition,
If a guide is provided on the table 13 by marking a line indicating the center of the rollers 1 and 2, the laminated product can be heated or pressurized at the optimal position of the rollers 1 and 2. You can expect a good finish regardless of your level of skill in handling it.

The laminating adhesive that protrudes from the adhesive surface of the transparent film when heated and pressurized by rollers 1 and 2,
It adheres to the outer surface of the endless belt 4 and moves together with the endless belt 4. When the part to which this adhesive is adhered comes to the contact position of the scraper 6 with the endless belt 4, a frictional force acts between the sliding contact plate 21 and this adhesive, thereby peeling off the adhesive. In particular, the endless belt 4 of this embodiment is coated with Teflon, and the adhesive can be easily peeled off by the sliding plate 21 without requiring much force. At this time, the bent portion 26 of the rod-shaped spring 25 presses a point at the center of the inner surface of the sliding contact plate 21 with its tip, but since the rib 24 is made to extend parallel to the long side on the inner surface of the sliding contact plate 21, This sliding contact plate 21 does not warp, so that a uniform pressing force can be applied to the entire contact surface with the endless belt 4. In addition, the bending part 2
Even if a pressing force is applied to the spring 6, the rod-shaped spring 25 will not shift left or right due to the guards of the two ribs 24 provided upright on both sides, thereby preventing the pressing force from escaping. Furthermore, for the above-mentioned structural reason, the scraper 6 is stabilized when its sliding contact plate 21 overlaps with the tangent line of the side circle of the roller 1.2, so that the sliding contact plate 21 is stable when it overlaps with the tangent line of the side circle of the roller 1.2. Even if it is pulled in the direction of movement due to friction and deviates, there is a restoring force that always tries to return to the tangential line.
A stable pressing force can be continuously applied to the surface of the endless belt 4.

Note that since the pressing force exerted by the sliding contact plate 21 is supported by the rollers 1.2, the force can be applied only in the thickness direction of the endless belt 4, and an effective effect can be expected. At the same time, since no force is applied in the direction of increasing the tension of the endless belt 4, no unnecessary burden is placed on the endless belt 4.

Furthermore, in this embodiment, for each of the upper and lower endless belts 4, two scrapers 6 are attached to both the entrance roller 1 and the exit roller 2, so the adhesive is removed in two stages. By doing so, more reliable effects can be obtained.

〔Effect of the invention〕

As explained above, according to the laminating apparatus described in the first claim, by providing a scraper for peeling off the laminating adhesive that protrudes from the adhesive surface of the transparent film during heating and processing, it is possible to scrape off the laminating adhesive on the surface of the laminated product. It is possible to prevent this adhesive from adhering, thereby producing a laminated product with a good finish.

Further, according to the scraper described in the second claim, the sliding contact plate of the scraper can be brought into sliding contact with the endless belt with a uniform and stable pressing force, and the adhesive can be effectively peeled off. .

Furthermore, according to the arrangement of the scraper described in the third claim, it is possible to reliably apply a pressing force in the thickness direction of the endless belt, and since no tension is applied to the endless belt, no unnecessary burden is placed on the endless belt. This eliminates the need for overheating, thereby reducing equipment failure.

[Brief explanation of the drawing]

Figure 1 is a front sectional view of the laminating device, Figure 2 (al is a perspective view of the scraper, in Figure 2) is a front sectional view of the scraper, and Figure 2 (C) is the scraper taken along line A-A in Okayama). FIG. ■...Publication side roller, 2...Exit side roller, 4...
・Endless belt 5... Contact moving part, 6... Scraper, 7... Machine frame, 9... Heating device 21... Sliding contact plate, 22... Ledge part, 23... Length hole,
24... Rib, 25... Rod-shaped spring, 26...
・Refraction section patent applicant Meiko Shokai Co., Ltd.

Claims (3)

[Claims] (1) Two sets of endless belts are arranged between rollers on the entrance side and rollers on the exit side so that the endless belts move in contact with each other in opposition on the outward path, and the endless belts are A heating device is installed to heat the
A laminating apparatus in which a laminated product is heated and pressurized by a contact moving part of the endless belt, characterized in that a scraper for peeling off a laminating adhesive is brought into sliding contact with the outer surface of the endless belt. (2) a sliding contact plate that slides in contact with the endless belt; ears on the sliding contact plate that are respectively erected at both ends in the width direction of the endless belt; and long holes that are opened in the ears and are long in the direction away from the endless belt; Both ends are engaged with the machine frame, and the insides thereof are penetrated through the long holes of both ear parts, and are further bent at the center, and this bent part presses the inside of the sliding contact plate toward the endless belt side. The first scraper is characterized in that the scraper is constituted by a rod-shaped spring and a plurality of ribs that extend in the width direction of the endless belt on the inner surface of the sliding contact plate and are erected on both sides of the rod-shaped spring in the width direction. A laminating apparatus according to the claims. (3) The laminating apparatus according to claim 1 or 2, characterized in that the scraper is disposed at a position where the endless belt is sandwiched between the scraper and the roller.