JPH07136562A - Adhesive tape applying device - Google Patents

Abstract

PURPOSE:To produce an adhesive tape of consistent quality by measuring the distance between a movable roll and a fixed roll a range finder and immediately correcting the measured value if it differs from a prescribed distance. CONSTITUTION:A connecting piece 7 is inserted between a frame 6 for supporting a rotating shaft of a movable roll 4 and a frame 5 for supporting a rotating shaft of a fixed roll 3. A surface 61 of the frame 6 is inclined. A surface 72 of the connecting piece 7 abutted on the surface 61 is similarly inclined. Data measured by a range finder 8 and data stored in a memory part of a controller are subjected to comparison arithmetic treatment in an arithmetic treatment part. It the distance between the movable roll 4 and the fixed roll 3 differs from a specified, one, the arithmetic treatment part issues a command to a movable device 9 to the connecting piece 7 along the inclined surface, allowing the difference to be corrected. Thus, the distance is kept at the specified one.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive tape automatic coating device.

[0002]

2. Description of the Related Art Conventionally, a pressure-sensitive adhesive tape has been manufactured by coating a coating liquid such as a pressure-sensitive adhesive, an undercoating agent and a release agent on the surface of a base material such as kraft paper, cellophane and vinyl chloride resin film.
The adhesive tape coating device used at this time is for coating the base material with the coating liquid that has passed through the gap between the fixed roll and the movable roll or the bird doctor (hereinafter referred to as the movable roll).

Therefore, in such an adhesive tape coating device,
Since the coating amount of the coating liquid is determined by the distance between the fixed roll and the movable roll, conventionally, a thickness gauge was inserted to measure the distance between the fixed roll and the movable roll. If you discover what you are doing,
The movable roll was moved to adjust the distance between the fixed roll and the movable roll. As a device for controlling the coating amount of the coating liquid, there is known a device for changing the gap of the passage for supplying the coating liquid, as described in JP-A-63-69561.

[0004]

In the method of controlling the coating liquid by adjusting the gap between the fixed roll and the movable roll with a thickness gauge, even if the gap is adjusted first, the gap between the fixed roll and the movable roll is adjusted during the coating. Since the distance between the movable roll and the movable roll may change gradually, the distance between the fixed roll and the movable roll was sometimes measured and adjusted with a thickness gauge. However, since it is impossible to constantly insert and measure the thickness gauge, there is a problem that the quality is not constant, and the operation of frequently inserting the thickness gauge to measure the distance and move and adjust the movable roll is troublesome.
Further, this adjustment has a problem that many parts are caused by a person's can, and therefore an error is easily caused by a person.

Further, the coating amount varies depending on the type of the adhesive tape, that is, the application, the type of the base material, the thickness of the adhesive, the viscosity of the adhesive, etc. Therefore, depending on the type of the adhesive tape, a fixed roll and a movable roll are used. It is necessary to change the distance of. Therefore, it is necessary to adjust this distance each time the type of the adhesive tape is different, but this adjustment of the distance is a fine adjustment, which is troublesome.

Since the apparatus described in the above publication adjusts the coating amount by changing the gap of the passage for supplying the coating liquid, the distance between the bird doctor and the fixed roll does not change. Therefore, accurate control is difficult. Further, in this publication, the passage gap is changed between the push bolt and the pull bolt, but it is extremely difficult to rotate the push bolt and the pull bolt by hand to adjust the subtle passage distance. Since it is complicated and there are many types of adhesive tapes, and the coating amount for applying the coating liquid is different for each type, the device described in this publication differs for all types of adhesive tapes of different types. It is difficult to quickly adjust the coating amount. Then, the objective of this invention is to provide the adhesive tape automatic coating device which can adjust a coating amount easily and correctly and can adjust a coating amount quickly according to the kind of adhesive tape.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and includes a fixed roll, a movable roll provided in parallel with a predetermined distance from the fixed roll, and a fixed roll. From a rangefinder that measures the distance between the roll and the movable roll, a movable device that changes the distance between the movable roll and the fixed roll, and a control device that controls the distance between the fixed roll and the movable roll. In the adhesive tape coating apparatus, a mount supporting the rotary shaft of the movable roll and a mount supporting the rotary shaft of the fixed roll are provided opposite to each other, and a connecting piece is connected between the mounts. The two surfaces of the piece are inserted so that they can abut and slide on the opposite surfaces of both mounts, respectively, and at least one of the fixed roll mount and the movable roll mount is inclined, and of The surface of the connecting piece that is in contact with the slope is inclined in the same direction and the same angle as the inclined surface of the gantry, the control unit includes a storage unit and a calculation processing unit, and is fixed to a movable roll that is predetermined according to the type of adhesive tape. Data relating to a predetermined distance from the roll is stored in the storage unit, and the calculation processing unit performs comparison calculation processing on the data measured by the distance meter and the data stored in the storage unit, and moves based on the result. The movable device moves the connecting piece along the inclined surface of the gantry so as to maintain the distance between the fixed roll and the movable roll at a predetermined distance by issuing a control signal to the device.

The range finder used in the present invention may be a contact type range finder or a non-contact type range finder, but it is preferable that the measured data can be directly input to a computer. As a non-contact distance meter, electromagnetic waves or ultrasonic waves are transmitted from one roll side and received by the other roll side, or electromagnetic waves or ultrasonic waves reflected by the other roll side are received. Then, the distance between one roll and the other roll is measured. Further, as a contact type distance meter, the distance meter is attached to one of the rotating shaft or the pedestal of the movable roll or the fixed roll, and the tip of the distance meter is in contact with the other, and the distance is measured by moving the tip. Is. As a contact type distance meter, a linear gauge is preferable because it has high accuracy and the measured value can be directly input to the computer.

[0009]

In the pressure-sensitive adhesive tape coating apparatus of the present invention, the mount supporting the rotary shaft of the movable roll and the mount supporting the rotary shaft of the fixed roll are provided so as to face each other, and the connecting piece is provided between the both bases. Are inserted so that they can be brought into contact with the opposite surfaces of both mounts and can slide. Moreover,
At least one of the surfaces of the movable roll base and the fixed roll base facing each other is inclined, and the surface of the connecting piece that abuts the inclined surface of the base is inclined in the same direction and at the same angle as the inclined surface of the base. When this connecting piece is moved along the inclined surface, the mount of the movable roll moves, and as a result, the distance between the movable roll and the fixed roll changes.

For example, when the connecting piece is moved in the direction in which the connecting piece is thinned by the inclined surface, the portion of the connecting piece thicker than the width before the movement is located between the movable roll base and the fixed roll base. Since it is to be inserted into, the distance between the movable roll and the fixed roll increases and the two are separated. On the contrary, when the connecting piece is moved in the thicker direction, the distance between the movable roll and the fixed roll becomes smaller.

In the present invention, data relating to a predetermined distance between the movable roll and the fixed roll, which is predetermined according to the type of the adhesive tape, is stored in the storage section, and the distance between the movable roll and the fixed roll is stored. Continuously measuring with a meter, the measured data and the data stored in the storage unit are compared and calculated by the calculation processing unit, and when the distance between the movable roll and the fixed roll is a predetermined distance, it is as it is. When the adhesive tape coating device is movable and the distance between the movable roll and the fixed roll is different from the predetermined distance, in order to perform control so as to return to the predetermined distance, arithmetic processing is performed,
The command based on this result causes the movable device to move the connecting piece along the inclined surface of the pedestal to maintain the distance between the fixed roll and the movable roll at a predetermined distance. Therefore, the distance between the movable roll and the fixed roll can be easily and accurately maintained, and as a result, an adhesive tape of a constant quality in which the coating liquid is applied to a predetermined thickness can be manufactured.

There are many types of adhesive tapes, and the distance between the movable roll and the fixed roll differs depending on the type of the adhesive tape. In the present invention, however, the movable roll and the fixed roll that are predetermined according to the type of the adhesive tape are used. Data relating to a predetermined distance from the roll is stored in the storage unit, and the stored data and the data measured by the range finder are subjected to comparison calculation processing by the calculation processing unit, and based on this result, the fixed roll and Since the distance to the movable roll is maintained at a predetermined distance,
Even if the product is different, the coating amount can be adjusted easily and quickly.

[0013]

EXAMPLES Next, examples of the present invention will be described. 1 to 3 show an embodiment of an adhesive tape coating apparatus of the present invention, FIG. 1 is an explanatory view of an adhesive tape manufacturing apparatus, and FIG. 2 shows a mounting state of a fixed roll and a movable roll as an axis of the fixed roll. FIG. 3 is an explanatory view seen from above the bisector, which is connected to the axis of the movable roll, and FIG. 3 is an explanatory view showing a state in which the movable roll moves. FIG. 4 shows another embodiment of the adhesive tape coating device of the present invention, and is an explanatory view of the adhesive tape manufacturing device.

1 to 3, A is an adhesive tape manufacturing apparatus, and this adhesive tape manufacturing apparatus A comprises a base material unwinding device 1, an adhesive applying device 2, an adhesive drying device 11, and
It comprises a winding device 12. The pressure sensitive adhesive application device 2 includes a fixed roll 3, a movable roll 4, and a pressure sensitive adhesive liquid reservoir 13. As shown in FIG. 2, the movable roll 4 and the fixed roll 3 are provided substantially in parallel at a predetermined distance. Reference numeral 15 is a base material made of a vinyl chloride resin film.

Numeral 5 is a mount for supporting the rotary shaft 31 of the fixed roll 3, which is provided on both sides of the fixed roll 3. 6
Is a pedestal that supports the rotating shaft 41 of the movable roll 4, and is provided on both sides of the movable roll 4. The pedestal 5 of the fixed roll 3 and the pedestal 6 of the movable roll 4 are provided so as to face each other, and the opposing surfaces 61 of the pedestal 6 of the movable roll 4 are substantially parallel to the axial direction of the movable roll 4 and It is inclined at a right angle to. Reference numeral 7 denotes a connecting piece, and the connecting piece 7 is provided between the pedestal 5 of the fixed roll 3 and the pedestal 6 of the movable roll 4, and the connecting piece 7 has two surfaces 71 and 72 of the connecting piece 7.
And abutting surfaces 51 and 61 of the pedestal 6 facing each other,
It is inserted so that it can slide. A surface 72 of the movable roll 4 that contacts the inclined surface 61 of the pedestal 6 is inclined in the same direction and at the same angle as the inclined surface 61. Further, a screw hole is provided on the end face thickened by the inclined surface 72. 8 is a range finder (model DG-327) made of Ono Sokki Co., Ltd. This range finder 8 is attached to a pedestal 5 provided on both sides of the fixed roll 3 and is a range finder. The tip of 8 is in contact with the mount of the movable roll 4. The accuracy of the distance meter 8 is 1 μm, and the measurable range is 5 mm.

Reference numeral 9 denotes a movable device which moves the connecting piece 7 and, as a result, the movable roll 4 moves to adjust the distance between the movable roll and the fixed roll. The movable device 9 includes a drive motor 91 and The sprocket 92 attached to the drive motor 91 and the shaft 9 attached to the connecting piece 7.
5, the sprocket 94 attached to the shaft 95, the sprocket 94 and the sprocket 92
And a drive chain 93 that is bridged between and. A screw is provided on the outer peripheral surface of the shaft 95, and the tip of the shaft 95 is screwed into the screw hole of the connecting piece 7. When the drive motor 91 rotates, the shaft 95 rotates via the sprocket 92, the drive chain 93, and the sprocket 94. When the shaft 95 rotates, the shaft 95 is screwed into or out of the screw hole of the connecting piece 7. Since the drive motor 91 and the shaft 95 are fixed so as not to move, when the shaft 95 is screwed in or out, the connecting piece 7 is pulled or pushed out to the inclined surface 72. It is designed to move along.

Next, a method of using this adhesive tape manufacturing apparatus will be described. The base material 15 unwound from the base material unwinding device 1 enters the adhesive applying device 2. In this pressure-sensitive adhesive application device 2, the base material 15 is brought into close contact with the surface of the fixed roll 3 and enters the pressure-sensitive adhesive solution reservoir 13, where the pressure-sensitive adhesive solution consisting of the pressure-sensitive adhesive and the solvent is adhered to the surface of the base material 15. Then, it passes between the fixed roll 3 and the movable roll 4. Then, since the distance between the fixed roll 3 and the movable roll 4 is maintained at a predetermined distance as described below, the adhesive is applied to the surface of the base material 15 to a predetermined thickness. A state in which the distance between the fixed roll 3 and the movable roll 4 is maintained at a predetermined distance will be described.

The tip of the range finder 8 attached to the pedestal 5 is in contact with the opposite pedestal 6. Therefore, the distance between the fixed roll 3 and the movable roll 4 is constantly measured by this rangefinder. This measured value is input to the arithmetic processing unit in the control device. On the other hand, the storage unit of the control device stores data regarding a predetermined distance between the movable roll and the fixed roll, which is predetermined according to the type of the adhesive tape. Then, data regarding a predetermined distance between the movable roll and the fixed roll, which are determined in advance, is retrieved from this storage unit. Then, the arithmetic processing unit compares the data drawn from the storage unit with the data measured by the distance meter, and when the difference is equal to or more than a certain value, based on a preset relational expression stored in the storage unit. The drive amount of the movable device is calculated, and the number of rotations of the shaft 95 of the connecting piece 7 necessary to move the movable roll 4 to a predetermined distance is obtained. Then, the rotational speed of the shaft 95 is instructed to the movable device 9.

Then, the drive roll 91 rotates, and the shaft 95 rotates through the sprocket 92, the drive chain 93, and the sprocket 94 by the instructed rotation speed. Then, the connecting piece 7 to which the shaft 95 is attached moves along the inclined surface 61, and the distance between the movable roll 4 and the fixed roll 3 is returned to and maintained at a predetermined distance. The base material 15 thus coated with the pressure-sensitive adhesive solution to a predetermined thickness
Enters the drying device 11, is heated, the solvent is evaporated, and the base material 15 is coated with an adhesive having a predetermined thickness. The base material 15 to which the adhesive is applied in a predetermined thickness in this way is wound into a roll in the winding section and then cut into a predetermined width at another place to form an adhesive tape. The pressure-sensitive adhesive tape manufactured in this manner is a good product having a constant quality by applying the pressure-sensitive adhesive to a predetermined thickness.

When the adhesive tape is manufactured in this manner, the base material 15 is lost. Then, the roll 17 is automatically changed to the next pre-mounted roll 17, and the substrate 15 is supplied from the next roll. When the type of adhesive tape changes,
The operator inputs the type of adhesive tape into the arithmetic processing unit. Then, the arithmetic processing unit issues a command to the movable device 9 to move the movable roll to a predetermined distance of the adhesive tape which is set in advance, and changes the distance between the fixed roll 3 and the movable roll 4 to the predetermined distance. Let That is, the storage unit of the control device stores data relating to a predetermined distance determined in advance according to the type of adhesive tape, and the data measured by the distance meter 8 and the data stored in this storage unit are stored. A comparison calculation process is performed, and a command is issued to the movable device 9 so as to correct the distance between the fixed roll 3 and the movable roll 4 to a predetermined distance determined by this adhesive tape. Then, the movable device 9 operates and maintains the distance between the fixed roll 3 and the movable roll 4 at a predetermined distance. Therefore, the distance between the fixed roll and the movable roll is maintained at a predetermined distance regardless of the type of the adhesive tape. Actually, when an adhesive tape was manufactured by this apparatus, the difference between the thickness of the adhesive solution, which is a mixture of the adhesive and the solvent, and the predetermined thickness was within ± 5 μm. This difference did not affect the quality of the adhesive tape.

Next, the embodiment shown in FIG. 4 will be described. In the embodiment shown in FIG. 4, the pressure-sensitive adhesive that adheres to the surface of the fixed roll 3a passes between the fixed roll 3a and the movable roll 4a and has a predetermined thickness.
Substrate 15a pressed against fixed roll 3a by 9
It is designed to adhere to. Therefore, depending on the distance between the fixed roll 3a and the movable roll 4a, the base material 15a
The thickness of the adhesive that adheres to is determined. This fixed roll 3a
The method for setting the distance between the movable roll 4a and the movable roll 4a to a predetermined distance and other details are the same as those in the embodiment shown in FIGS.

[0022]

In the adhesive tape coating apparatus of the present invention, as can be seen from the above description, the distance between the movable roll and the fixed roll is constantly measured by the distance meter, and the measured data is stored in the arithmetic processing unit of the control device. When the input is made and this distance is different from the predetermined distance stored in the storage unit, the computer instructs the movable device to adjust and maintain the predetermined distance. Therefore, it is necessary to make a troublesome adjustment. Therefore, the distance between the fixed roll and the movable roll can be easily and accurately maintained at a predetermined distance. Therefore, since the coating liquid of a predetermined thickness passes from between the fixed roll and the movable roll maintained at this predetermined distance, by drying the base material coated with this coating liquid, the pressure-sensitive adhesive with a constant thickness can be obtained. It is safe because tapes can be manufactured.

Data relating to a predetermined distance between the movable roll and the fixed roll, which is predetermined according to the type of the adhesive tape, is stored in the storage unit of the control device, and the data stored in this storage unit and the distance meter are stored in the storage unit. Since the connecting piece is moved based on the measured data, it is convenient because different types of adhesive tape can be handled easily and quickly.

[Brief description of drawings]

FIG. 1 shows an embodiment of an adhesive tape coating device of the present invention, and is an explanatory view of an adhesive tape manufacturing device.

FIG. 2 is an explanatory view of the mounting states of the fixed roll and the movable roll of the adhesive tape manufacturing apparatus of FIG. 1 as viewed from the bisector of the fixed roll and the movable roll by connecting the fixed roll and the movable roll.

FIG. 3 is an explanatory diagram showing a state in which a movable roll moves.

FIG. 4 shows another embodiment of the present invention and is an explanatory view of an adhesive tape manufacturing apparatus.

[Explanation of symbols]

 A Adhesive tape manufacturing device 1 Base material unwinding device 11 Adhesive drying device 12 Winding device 13 Adhesive liquid reservoir 15, 15a Base material 2 Adhesive applying device 3, 3a Fixed roll 4, 4a Movable roll 5 Fixed roll stand 6 Movable roll mount 61 Inclined surface 7 Connecting piece 72 Inclined surface 8 Distance meter 9 Mobile device

Claims (1)

[Claims] 1. A fixed roll, a movable roll provided in parallel with a predetermined distance from the fixed roll, and a range finder for measuring a distance between the fixed roll and the movable roll.
A moving device for varying the distance between the movable roll and the fixed roll, and an adhesive tape coating device comprising a control device for controlling the distance between the fixed roll and the movable roll, wherein the rotating shaft of the movable roll is A supporting base and a supporting base that supports the rotation shaft of the fixed roll are provided so as to face each other, and a connecting piece is provided between the two bases, and two surfaces of the connecting piece contact the opposite surfaces of both the bases. It is inserted so that it can be slid, and at least one of the fixed roll base and the movable roll base is inclined, and the surface of the connecting piece that abuts the inclined surface of the base is the inclined surface of the base. Same direction
The control device is tilted at the same angle, and the control device includes a storage unit and an arithmetic processing unit, and the storage unit stores data regarding a predetermined distance between the movable roll and the fixed roll, which is predetermined according to the type of the adhesive tape. , The data measured by the range finder and the data stored in the storage unit are compared and calculated by the calculation processing unit, and based on the result, a control signal for the movable device is issued, and the movable device connects the connecting piece to the inclined surface of the gantry. A pressure-sensitive adhesive tape coating device, characterized in that the pressure-sensitive adhesive tape coating device is configured to be moved along with to maintain the distance between the fixed roll and the movable roll at a predetermined distance.