JP2858734B2 - Laminator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a laminator for applying laminating to an article.

[0002]

2. Description of the Related Art A laminator is a laminating film coated with a hot-melt adhesive layer in order to protect a sheet-like article such as a backing on which a commuter pass, a photograph, a pressed flower and the like are placed from dirt and scratches. This is an apparatus for sandwiching the front and back surfaces of the sheet-like article or superimposing the sheet-like article on one side, applying heat and pressure to press the sheet-like article and the film, and securely integrating them.

In this laminating treatment, heating conditions differ depending on the thickness or material of the sheet-like article.
The heating time was adjusted by changing the rotation speed of the laser. That is, when laminating a thick sheet, the roller speed is slowed to increase the heating time, and when the sheet is thin, the roller speed is increased to shorten the heating time. The adjustment of the rotational speed of the roller has conventionally been performed by changing the motor voltage, which is the driving source of the motor.

However, in the case of this thick sheet, the voltage was lowered to reduce the roller speed. However, when the voltage was lowered, the force for feeding the sheet-like articles of the roller also decreased, and the sheet could not be operated. Etc. often occurred. For this reason, when handling a thick object with a conventional laminator, it is necessary to use a large motor having a large output capable of compensating for a voltage drop, and there is a disadvantage that the apparatus body becomes large and heavy.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to eliminate such a drawback, that is, to provide a thick laminated material which places a large load on a motor, at the slowest setting range. It is an object of the present invention to provide a laminator capable of running at the maximum output of the motor even when the vehicle travels while increasing the heating time at the rotation speed. As a result,
An object of the present invention is to provide a laminator in which a small motor can be used instead of a large motor even under the above-mentioned conditions, and the apparatus body is small and lightweight, and can be installed on a desktop.

[0006]

According to the present invention, a laminator is provided by applying a sheet-like article and a hot-melt adhesive between at least one pair of counter-rotating rollers.
Overheating by passing laminated
In a laminator that is pressurized and pressed integrally,
The heater is installed in the roller, and the roller is driven in the housing.
Motor and speed sensor connected to it, operated by the user
Setting means that can set the target speed by
Control means for connecting to the server and the setting means, wherein the control means
Set the roller speed detected by the speed sensor as the target
Speed and compare the difference to the motor current.
Adjust to zero and set the roller rotation speed to the target
The configuration is such that it matches the rotation speed .

[0007] The roller of the present invention, heat and pressure is provided only one pair, it may be to perform all the sheet feed discharge, but two pairs are provided, the heater is provided a pair on the inlet side <br / The sheet-like article may be heated and pressurized by <1>, and another pair may be provided on the outlet side to compress and discharge the sheet-like article.
As the heater, various heating lamps, a tube heater using a nichrome wire, a rubber heater, or the like can be used. Further, in the present invention, a laminate film may be sandwiched between two front and back sheets and pressure-bonded, or one laminate film may be pressure-bonded to one surface.

Further, the control means in the present invention includes a converter for converting at least a signal sent from the detection means into a voltage, and a comparator for comparing a voltage from the converter with a voltage sent from the setting means. And a current control circuit for adjusting the current of the driving means so as to make the difference compared by the comparator coincide.

[0009]

In order to operate the laminator of the present invention, when the power is first turned on, the heating means and the driving means are energized, and the pair of rollers rotate in opposite directions to each other. Heated. When a sheet-like article and a laminating film are overlapped and inserted between the rollers rotating while being heated, the roll heats and compresses the sheet and the film to melt the adhesive, thereby forming an integrated body. And is discharged in the direction opposite to the insertion port.

Here, when laminating the thick sheet, if the user adjusts the target rotation speed of the setting means to an appropriate speed, the set target rotation speed is sent to the control means, and the control means is controlled. Is compared with the current rotation speed sent from the detection means, and adjusts the current of the drive means so as to make the difference between the rotation speeds coincide with each other, thereby reducing the rotation speed of the roll. As a result, the heating time is increased and sufficient heat is given to the thick sheet, but at the same time, the sheet can run at the maximum output of the motor even when the rotation speed is slow.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited to these embodiments.

In FIG. 1, the laminator 1 is provided with an inlet 4 having a bottom surface formed by an inlet guide table 3 on the front side of a housing 2 and an outlet portion 6 having a bottom surface formed by an outlet guide table 5 on the back side. Are provided so that the surfaces of the guide tables 3 and 5 are in the same horizontal plane. Inside the entrance guide table 3, a pair of rollers 6 and 6 for heating and pressurizing which are in contact with each other and rotate in the opposite direction are provided, and the exit guide table 5 is provided.
A pair of rollers 7, 7 for pressing and discharging in contact with each other and rotating in the opposite direction are provided on the inner surfaces of the guide tables 3, 5, and the tangential lines of the rollers 6, 6, and 7, 7 are provided on the surfaces of the guide tables 3, 5. They are almost the same.

Far infrared ray tube heaters 8, 8 which are heating means of variable temperature are provided in the center of the rollers 6 and 6 for heating and pressing to heat the surfaces of the rollers 6 and 6. I have to do it. Further, a thermistor 9 as a temperature sensor is brought into contact with the surface of the lower roller 6, and the surface temperature of the roller 6 is detected by the thermistor 9, and the detected temperature is converted to the surface temperature. Temperature controller (not shown) converted to proportional analog voltage
And can always be adjusted to the appropriate temperature.

Protective covers 10 and 10 are provided outside the rollers 6 and 6 for heat and pressure bonding to protect the heat of the rollers 6 and 6 from the outside air and to the rollers 7 and 7. Cooling of the running sheet-like article 11 is also prevented. The protective cover 10 also serves as a movement assisting guide so that the sheet-like article 11 can be reliably fed between the rollers 7, 7 even if the sheet-like article 11 warps after passing through the rollers 6, 6. Has become.

Further, the housing 2 is provided with a servo motor 12 as a driving means, a controller 13 as a control means, a setting means 14 and a power switch 15, and the setting means 14 is provided with a volume. There is a scale on which the target rotation speed can be freely set, and the user can operate while checking the scale. On the back side of the servo motor 12, a speed sensor 16 as a detecting means for detecting a rotation speed is connected.

The controller 13 as a control means comprises a converter 17, a comparator 18, and a current control circuit 19 as shown in FIG. The converter 17 converts the pulse signal of the detection speed sent from the speed sensor 16 into a detection signal of an analog voltage,
18 takes in the detection signal sent from the converter 17 and the speed setting signal sent from the setting means 14, compares the difference and outputs a digital voltage control signal so as to make them coincide with each other. Controls the current supplied to the servomotor 12 to adjust the rotation speed.

In order to operate the laminator of this embodiment, first, the power switch 15 is turned on to heat the far-infrared ray tube heater 8, and the servo motor 12 is driven. Then, Roller 6,
The roller 7 rotates at a constant speed while contacting each other clockwise on the upper side and counterclockwise on the lower side, and the surface of the roller 6 is heated. Next, when the volume of the setting means 14 is adjusted to the scale of the target rotation speed, an analog voltage V ₀ proportional to the set speed is sent to the comparator 18 as a detection signal. At the same time,
The pulse signal sent from the speed sensor 16 connected to the converter 12 is converted into the analog voltage V by the converter 17 and
Sent to 18.

In the comparator 18, when the analog voltage is V
If <V ₀ , a control signal C for increasing the speed is output, and in response to this, the current control circuit 19 adjusts the current of the servo motor 12 so as to increase the current. Make the rotation faster. If the analog voltage is V> V ₀ on the contrary, outputs a control signal C to slow down the speed, the current control circuit 19 Gasa receiving it - Vomo - adjusted to be less current motor 12, b -Slow down the rotation of la 6 and 7; Therefore, the feed speed is settled at the arbitrarily set target speed.

Here, even when the set speed is the slowest in the settable range, the servo motor 12 can use its maximum output. In this embodiment, the controller
Although the comparator 18 is used as the comparator 13, the invention is not limited to this. For example, an electronic circuit of a microcomputer or a function generator may be used. Further, an analog voltage may be directly sent from the speed sensor 16 to the comparator 18 without passing through the converter 17.

Between the rollers 6 and 6 having the proper feeding speed and heating conditions, the laminating films 20 and 20 are placed on the front and back.
When the sheets 11 sandwiched and sandwiched between are inserted while being placed on the entrance table 3, the hot-melt adhesive applied to the laminating film 20 is heated and melted and pressurized.
The rollers 7, 7 are also pressurized to be integrally formed by pressure and discharged from the outlet table 5.

[0021]

According to the present invention, even if a thick laminating object which places a large load on the motor is run at the slowest rotational speed in the set range and the heating time is increased, the present invention can be applied to the motor. As a result, the motor can be run at the maximum output of the motor, and a large motor with a large output as in the prior art is not required, and the motor can be downsized. Therefore, the size and weight of the apparatus main body can be easily reduced, and the apparatus can be easily transported and installed. In addition, since the speed can be kept constant, the finish of the laminate is uniform and the quality is improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the present invention.

FIG. 2 is a block diagram showing a control system of the embodiment.

[Explanation of symbols]

 2 Housing 6 Roller for heating and pressing 7 Roller for discharging and pressing 8 Heater (heating means) 11 Sheet-like article 12 Motor (driving means) 13 Controller (control means) 14 Setting means 16 Speed sensor (detection means) 17 Converter 18 Comparator 19 Current control circuit 20 Laminate film

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B32B 35/00 B29C 63/02 B32B 31/20

Claims (3)

(57) [Claims] At least one pair of counter-rotating rollers
Laminate coated with sheet-like article and hot-melt adhesive
Heat film and pressurize
In a laminator that is crimped into a body,
A motor that drives the rollers in the housing.
Speed sensor connected to it, target speed operated by user
Setting means that can set the degree, speed sensor and setting
Control means coupled to the means, wherein the control means is a speed sensor
-Compare the roller speed detected by the
Adjust the motor current using the difference
And set the roller rotation speed to the target rotation speed.
A laminator that matches . 2. A roller comprising two pairs of rollers, one pair being provided on the inlet side for heating and pressurizing the sheet-like article by heating with a heater , and the other pair being provided on the outlet side for pressing and discharging the sheet-like article. The laminator according to claim 1, wherein 3. The apparatus according to claim 2, wherein said control means includes at least said speed sensor.
A converter that converts the signal sent from the
Voltage from the heat exchanger and sent from the target speed setting means.
A comparator for comparing the voltage with the output of the comparator.
Current to adjust the motor current to match the difference
3. The laminator according to claim 1, comprising a control circuit .