JP6954064B2 - Seat manufacturing equipment, seat manufacturing method and balancing equipment - Google Patents

Description

The present invention relates to a sheet manufacturing apparatus, a sheet manufacturing method, and a balancing apparatus for holding a feeding terminal.

When performing melt extrusion molding of a thermoplastic resin sheet, a smooth and thin resin film can be produced by pressing a pair of rolls having smooth surfaces against the molten thermoplastic resin, or rolls having a fine structure formed on the surface. The fine structure is transferred to the surface of the thermoplastic resin sheet using the above, and various functions are imparted to the surface of the sheet molded product.

In the production of a thermoplastic resin sheet having a fine structure formed, a main roll having a fine structure formed on the surface and a secondary roll for crimping are opposed to a molten thermoplastic resin sheet flowing out from the lip portion of a T die or a coated hanger die. A thermoplastic resin sheet in which the microstructure is formed is manufactured by applying pressure to the surface and transferring the microstructure to the surface.

In general, by controlling the temperature of the roll that the molten thermoplastic resin sheet comes into contact with and keeping the temperature of the molten thermoplastic resin sheet high, the ease of molding the thermoplastic sheet and the microstructure to the thermoplastic resin sheet can be obtained. The transferability of the resin is improved.

Patent Document 1 (Patent No. 5111800) heats the heat insulating layer provided inside the outermost layer and the outermost layer of the main roll in order to keep the temperature of the molten thermoplastic resin sheet in contact with the main roll high. A sheet molding apparatus provided with a heating unit is disclosed. Further, in Patent Document 2 (International Publication No. 2015/133170), a nozzle for extruding a heated resin sheet, a main roll having a surface portion on which a fine structure is formed, and a main roll separated from the main roll are arranged. A sheet manufacturing apparatus comprising a slave roll to be formed, pressing the sheet between the main roll and the slave roll to transfer the fine structure to the sheet, and a conductive portion of the surface portion. A sheet manufacturing apparatus is disclosed, which comprises a feeding mechanism for supplying heat to the conductive portion from both ends of the main roll in order to generate heat of the conductive portion. The sheet manufacturing apparatus described in Patent Document 2 maintains the surface portion of the main roll at an appropriate temperature in order to transfer the fine structure of the main roll to the sheet without complicating the outermost layer structure of the main roll.

Patent No. 5111800 International Publication No. 2015/133170

It is provided with a pair of rolls arranged apart from each other and a conductive portion provided on the side surface (hereinafter, also referred to as “circumferential surface”) of at least one roll of the pair of rolls and generating heat when an electric current flows. When melt extrusion molding of a thermoplastic resin sheet is performed using a sheet manufacturing apparatus, a high current (for example, tens to hundreds of amperes) is stably applied to the conductive portion in order to generate stable heat of the conductive portion. It is required to flow to. Here, "current stability" means a significant fluctuation in the current value flowing between the terminals in contact with the conductive portion of the roll while the roll is rotating (as a result of the fluctuation in the current value, the manufacture of a thermoplastic resin sheet). It means that there is no change to the extent that it has an unfavorable effect.

At the time of melt extrusion molding of the thermoplastic resin sheet, the pair of rolls is rotating, and if the contact between the conductive portion and the terminal (sliding contact) for passing an electric current through the conductive portion is not stable, the said. There is a problem that the current flowing through the conductive portion is also unstable.

As schematically shown in FIG. 6, conventionally, a pair of substantially semi-cylindrical terminals (brushes) covering about half the circumference of the roll are used, and a force is applied from the terminal holding portion holding the terminals toward the terminals. Then, a configuration was used in which the terminal was brought into contact with the roll. In this configuration, there is a problem that the pressure applied to the contact surface between the terminal and the roll has a relatively large unevenness, and the contact is not stable especially in the portion away from the terminal holding portion (the end portion of the terminal). Further, there is a problem that the wear of the terminal becomes uneven due to the unstable contact. Since the contact of the terminals becomes unstable due to uneven wear, there is a problem that the replacement cycle of the terminals is accelerated.

Therefore, the present invention includes a conductive portion provided on the circumferential surface of at least one of the pair of rolls and generating heat when a current flows, and a terminal (feeding terminal) for passing a current through the conductive portion. It is an object of the present invention to provide a sheet manufacturing apparatus further provided with a terminal unit for stabilizing contact with the conductive portion. Another object of the present invention is to provide a sheet manufacturing method using the sheet manufacturing apparatus and an equilibrium apparatus for holding terminals.

Embodiments of the present invention include the following configurations.
[1]
A sheet manufacturing apparatus comprising a pair of rolls arranged apart from each other and pressing a heated thermoplastic resin sheet between the pair of rolls.
A conductive portion that generates heat when an electric current flows is provided on the circumferential surface of at least one of the pair of rolls.
The sheet manufacturing apparatus includes a pair of terminal units for supplying power to the conductive portion.
The pair of terminal units each include a first and second terminal and an equilibrium device that holds the first and second terminals and brings the first and second terminals into contact with the conductive portion. The sheet manufacturing apparatus.
[2]
The balancing device includes a first holding piece that holds the first terminal at one end, a second holding piece that holds the second terminal at one end, and the first and second holding pieces, respectively. Equipped with a drive unit connected to the other end
The first and second holding pieces are supported by a shaft portion and are supported by a shaft portion.
The sheet manufacturing according to [1], wherein the drive unit rotates and displaces the first and second terminals around the shaft portion and makes contact with the conductive portion by adjusting the distance between the other ends. Device.
[3]
Each of the contact surfaces of the first and second terminals in contact with the conductive portion has the same radius of curvature as the circumferential surface of the at least one roll, and the circumference of the at least one roll in the circumferential direction. The sheet manufacturing apparatus according to any one of [1] and [2], which has a length of 1/8 to 1/3.
[4]
On a plane parallel to the bottom surface of the roll, a straight line connecting the center of the at least one roll and the one end of the first holding piece is a straight line connecting the shaft portion and the one end of the first holding piece. The sheet manufacturing apparatus according to [2], wherein the length of the contact surface between the first terminal and the conductive portion in the circumferential direction is divided into two.
[5]
The sheet manufacturing apparatus according to any one of [1] to [4], wherein the first and second terminals are carbon brushes.
[6]
A microstructure provided on the circumferential surface of at least one roll of the pair of rolls is further provided, and the melted thermoplastic resin sheet is pressed between the pair of rolls to transfer the microstructure to the thermoplastic resin sheet. The sheet manufacturing equipment to be used
The sheet manufacturing apparatus according to any one of [1] to [5], wherein the conductive portion is fed to generate heat before the fine structure is transferred to the thermoplastic resin sheet.
[7]
A method for manufacturing a thermoplastic resin sheet using the sheet manufacturing apparatus according to any one of [1] to [6].
The step of bringing the first and second terminals into contact with the conductive portion,
A step of supplying power to the conductive portion and generating heat of the conductive portion,
A step of bringing the thermoplastic resin sheet into contact with the heat-generating conductive portion and heating the thermoplastic resin sheet,
The manufacturing method comprising a step of pressing the heated thermoplastic resin sheet between the pair of rolls.
[8]
An equilibrium device used in a sheet manufacturing device that presses a thermoplastic resin sheet heated between a pair of rolls arranged apart from each other.
A first holding piece that holds at one end a first terminal for supplying power to a conductive portion provided on the circumferential surface of at least one of the pair of rolls.
A second holding piece that holds a second terminal for supplying power to the conductive portion at one end, and a second holding piece.
A drive unit connected to the other end of each of the first and second holding pieces is provided.
The first and second holding pieces are supported by a shaft portion and are supported by a shaft portion.
The drive unit rotates and displaces the first and second terminals around the shaft portion by adjusting the distance between the other ends, and brings the first and second terminals into contact with the conductive portion.

The sheet manufacturing apparatus according to the embodiment of the present invention stabilizes the contact between the terminal for passing a current through the conductive portion of the roll and the conductive portion, and stabilizes the current flowing through the conductive portion.

It is a front conceptual diagram of the sheet manufacturing apparatus which concerns on one Embodiment. It is a conceptual diagram of the sheet manufacturing apparatus which concerns on one Embodiment. It is explanatory drawing of the terminal unit which concerns on one Embodiment. It is explanatory drawing of the terminal unit which concerns on one Embodiment. It is explanatory drawing of the terminal unit which concerns on one Embodiment. It is a conceptual diagram of the sheet manufacturing apparatus which concerns on the prior art.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments, and various numerical values, dimensions, materials, shapes, and the like are examples. Further, similar elements are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

FIG. 1 is a front conceptual view of the sheet manufacturing apparatus 1 according to the embodiment of the present invention. The sheet manufacturing apparatus 1 is for passing an electric current through a pair of rolls 20 (20A, 20B) (see FIG. 2) arranged apart from each other and a conductive portion 22 of at least one of the pair of rolls 20. It includes a pair of terminal units 10 (10A, 10B). The sheet manufacturing apparatus 1 may optionally include a die (not shown) for extruding the molten thermoplastic resin.

In the present embodiment, the configuration in which the pair of terminal units 10 are arranged with respect to the roll 20A will be described, but the configuration may be such that the pair of terminal units 10 are arranged with respect to the roll 20B instead of the roll 20A, or the pair of terminal units 10 may be arranged with respect to the roll 20A. It may be arranged with respect to both rolls 20A and 20B, and the molten thermoplastic resin sheet may be heated from both sides.

The rolls 20A and 20B have a columnar roll main body 21 made of metal or resin (resin having heat resistance or the like), and a conductive portion 22 provided on the circumferential surface of the roll main body 21. In the case where the pair of terminal units 10 are not arranged with respect to the roll 20B, it is not necessary to provide the conductive portion 22 on the roll 20B. Each of the rolls 20A and 20B is configured to rotate around the central axis of each roll main body 21 by a driving force from a driving mechanism (not shown).

The metal constituting the roll main body 21 is not limited, but is a metal having a thermal conductivity of 30 W / m · K to 120 W / m · K, preferably 40 W / m · K ~ 100 W / m · K at room temperature. .. For example, the metal constituting the roll main body 21 is carbon steel, chrome steel, chrome molybdenum steel, cast iron, tungsten steel, aluminum, or a combination thereof, and preferably chrome molybdenum steel SCM440 or carbon which is a structural alloy steel material. The contained carbon steel S45C. The outer diameter of the roll main body 21 is not limited, but may be 100 mm to 1000 mm.

A heat medium flow path (not shown) may be provided inside the roll main body 21 to control the heat on the circumferential surface of the roll main body 21. That is, when the molten thermoplastic resin sheet comes into contact with the circumferential surface of the roll 20 during melt extrusion molding of the thermoplastic resin sheet, the temperature of the contact surface rises and the portion from the contact surface to the heat medium flow path A temperature gradient occurs. The degree of temperature rise of the contact surface depends on the distance from the contact surface to the heat medium flow path. When this distance is short, the temperature control efficiency by the heat medium flowing through the heat medium flow path is high, and the thermoplastic resin sheet is cooled relatively quickly, but when the distance is long, the temperature control efficiency by the heat medium is low. The thermoplastic resin sheet cools relatively slowly.

The conductive portion 22 is provided on the circumferential surface of the roll main body portion 21 and generates heat when a current flows, for example, copper, iron, zinc, chromium, nickel, nickel-iron alloy, nickel-copper alloy, nickel-. Consists of one or more metals selected from the group consisting of chromium alloys, nickel-chromium-iron alloys, nickel-molybdenum alloys, nichrome (III, V) chromel B, nichrome I chromel C, and cantal (A, D). Will be done. Preferably, the conductive portion 22 is made of the metal plating formed by a plating method such as an electroless plating method or an electrolytic plating method, and is preferably made of a nickel-phosphorus alloy plating. When forming a fine structure in the conductive portion 22, the conductive portion 22 is composed of a relatively hard metal, for example, chromium or an alloy of chromium and another metal.

The conductive portion 22 may be provided in a layered manner over the entire circumference of the roll 20 (roll main body portion 21), or may be provided on a part of the circumference of the roll 20 (1/4 to 2/3 of the circumference, etc.). It may be provided. In order to increase the resistance value of the conductive portion 22 and reduce the current value flowing through the conductive portion 22, it is preferable to form the conductive portion 22 as thin as possible (for example, 10 μm or less). Further, in order to prevent the current of the conductive portion 22 from flowing out to the roll main body portion 21, an insulating layer (not shown) is provided between the conductive portion 22 and the roll main body portion 21 to improve the heat generation efficiency of the conductive portion 22. You may try to improve it. The insulating layer is composed of, for example, an insulator (preferably a phosphate film) obtained by directly treating the surface of the roll body 21.

At the time of melt extrusion molding of the thermoplastic resin sheet, pressure is applied to the thermoplastic resin sheet in which the pair of rolls 20A and 20B are melted, and at this time, the heat generated by the conductive portion 22 is transferred to the thermoplastic resin sheet. When a fine structure is formed on the surface of the conductive portion 22, the fine structure is also transferred to the thermoplastic resin sheet. The microstructure may be, for example, a matte pattern, a prism pattern, a microlens array pattern, or a decorative pattern for use in an exterior material or the like. The matte pattern can be formed by a method such as sandblasting, electric discharge machining, or chemical etching, and the prism pattern or the microlens array pattern can be formed by cutting with a diamond bite or the like.

The configuration of the terminal unit 10A will be described with reference to FIG. Since the terminal unit 10B has the same configuration as the terminal unit 10A, the description thereof will be omitted.

FIG. 2 is a conceptual diagram of the terminal unit 10A seen from the X direction (bottom surface of the roll 20) shown in FIG. The terminal unit 10A is an equilibrium device that holds the first and second terminals 11 and 12 and the first and second terminals 11 and 12 and brings the first and second terminals 11 and 12 into contact with the conductive portion 22. 13 and. The balancing device 13 applies a force applied to the first terminal 11 when the first terminal 11 is brought into contact with the conductive portion 22 and a force applied to the second terminal 12 when the second terminal 12 is brought into contact with the conductive portion 22. It is configured to equalize the force to be obtained (including substantially equality; the same shall apply hereinafter). Therefore, the average pressing on the contact surface between the first terminal 11 and the conductive portion 22 and the average pressing on the contact surface between the second terminal 12 and the conductive portion 22 are equal to each other. The pair of terminal units 10 may include a power supply 40 or the like that supplies power to the terminals through which a current flows through the conductive portion 22.

The first and second terminals 11 and 12 are terminals that function as sliding contacts for passing an electric current through the conductive portion 22, and are preferably carbon brushes. Each of the first and second terminals 11 and 12 in a wear-free state is configured so that the contact surface with the conductive portion 22 has the same radius of curvature as the circumferential surface (conductive portion 22) of the roll 20A. , Can make surface contact with the conductive portion 22.

The length of the contact surface between the first terminal 11 and the conductive portion 22 (also referred to as “first contact surface”) in the circumferential direction and the contact surface between the second terminal 11 and the conductive portion 22. (Also referred to as "second contact surface"), the length in the circumferential direction is preferably the same, but may be different. The sum of the length of the first contact surface (r1) and the length of the second contact surface (r2) is 1/8 to 3/4, preferably 1/4 to 2 of the circumference of the roll 20A. / 3, more preferably about 1/2.

The balancing device 13 has a first holding piece 14 that holds the first terminal 11 at one end 14a via the fixture 11a, and a second holding piece 14 that holds the second terminal 12 at one end 15a via the fixture 12a. A holding piece 15 and a driving unit 16 having a driving shaft 16a connected to the other end 14b of the first holding piece 14 and the other end 15b of the second holding piece 15 are provided. The first holding piece 14 and the second holding piece 15 are rotatably supported by the shaft portion 17. Preferably, the first and second holding pieces 14 and 15 have the same dimensions and shapes, and are supported by the shaft portion 17 at the same positions.

In the present embodiment, the terminals that come into contact with the conductive portion are the first terminal 11 and the second terminal 12, and the first and second terminals 11 are compared with the conventional semi-cylindrical terminals shown in FIG. Since the length of the roll 12 in the circumferential direction is relatively short, the pressure unevenness on each of the first contact surface and the second contact surface can be reduced, and the first and second terminals 11 and 12, respectively. The difference in wear due to the use of the contact surface in the above can also be reduced. Further, since the balancing device 13 is configured to apply a force evenly to the first and second terminals 11 and 12, the pressure unevenness between the first contact surface and the second contact surface is reduced. , The difference in wear due to use between the first and second terminals 11 and 12 can also be reduced.

The drive unit 16 includes a drive source 16b that expands and contracts the drive shaft 16a by receiving electrical energy, and is, for example, an electric linear actuator. As the drive shaft 16a expands and contracts, the other ends 14b and 15b of the first and second holding pieces 14 and 15 connected to both ends of the drive shaft 16a move in the direction of the drive shaft 16a in accordance with the movement of the drive shaft 16a. Displace along. The action of the displacement of the other ends 14b, 15b of the first and second holding pieces 14, 15 causes the one ends 14a, 15a of the first and second holding pieces to be rotationally displaced around the shaft portion 17 (FIG. 3 (FIG. 3). a)).

For example, when the other ends 14b and 15b of the first and second holding pieces 14 and 15 are displaced in the opening direction (so as to increase the distance between them) due to the action of the drive unit 16 (extending the drive shaft 16a). , One ends 14a, 15a of the first and second holding pieces 14, 15 are also rotationally displaced in the direction of opening around the shaft portion 17, and conversely, due to the action of the drive portion 16 (the drive shaft 16a contracts), the first When the other ends 14b and 15b of the first and second holding pieces 14 and 15 are displaced in the closing direction (so as to reduce the distance between them), the ends 14a and 15a of the first and second holding pieces 14 and 15 are also displaced. Rotationally displaces around the shaft 17 in the closing direction (scissors-like mechanism).

A ring plier-like mechanism opposite to the scissors-like mechanism may be used (FIG. 4). That is, when the other ends 14b and 15b of the first and second holding pieces 14 and 15 are displaced in the opening direction (so as to increase the distance between them) by the action of the drive unit 16 (the drive shaft 16a is extended). , One ends 14a, 15a of the first and second holding pieces 14, 15 are rotationally displaced around the shaft portion 17 in the closing direction, and conversely, due to the action of the drive portion 16 (the drive shaft 16a contracts), the first When the other ends 14b and 15b of the first and second holding pieces 14 and 15 are displaced in the closing direction (so as to reduce the distance between them), the ends 14a and 15a of the first and second holding pieces 14 and 15 are moved. It may be rotationally displaced in the opening direction around the shaft portion 17.

As described above, the first terminal 11 is rotationally displaced around the shaft portion 17. As shown in FIG. 5, when the first terminal 11 comes into contact with the conductive portion 22 of the roll 20A, the central axis C of the roll 20A and the first holding are preferably held in a plane parallel to the bottom surface of the roll 20A. The straight line connecting one end 14a of the piece 14 is orthogonal to the straight line connecting the shaft portion 17 and the one end 14a of the first holding piece 14 (90 degrees) or substantially orthogonal (90 degrees ± 10%), and the first It is advisable to design each part so that the length r1 of the contact surface between the terminal 11 and the conductive part 22 in the circumferential direction is halved or approximately halved (1/2 ± 10%). The same applies to the second terminal 12 and the second holding piece 15.

The shaft portion 17 supports the first and second holding pieces 14 and 15, even if the shaft portion 17 is fixed to a fixing member (not shown) so that the position relative to the roll 20 does not change. It may be (rigid mount), or may be configured to float (passively move) according to the movement of the first and second holding pieces 14 and 15 as shown in FIG. 3 (a). Further, the shaft portion 17 may be configured to be movable by a moving device (not shown). For example, when no current is passed through the conductive portion 22, the shaft portion 17 is lifted upward by the moving device so that the first and second terminals 11 and 12 do not come into contact with the roll 20A, and a current is passed through the conductive portion 22. Occasionally, the moving device may cause the shaft portion 17 to move downward (FIG. 3 (b)). Further, the shaft portion 17 may be a common shaft portion for the first and second terminal units 10A and 10B, or may be a separate shaft portion for the first and second terminal units 10A and 10B, respectively. May be good.

When a current is passed through the conductive portion 22 of the roll 20A during the manufacture of the thermoplastic resin sheet, the drive portion 16 operates (the drive shaft 16a is shortened), so that the first and second terminals 11 and 12 are connected to the conductive portion 22. Contact. At this time, since the first and second holding pieces 14 and 15 are rotatably supported via a common fulcrum (shaft portion 17), the action according to the operation of the drive shaft 16a is evenly first. And it is transmitted to the second terminals 11 and 12. In this way, even pressure is applied to the contact surface between the first and second terminals 11 and 12 and the conductive portion 22, so that between the first and second terminals 11 and 12 and the conductive portion 22. Contact is stable.

As described above, by using the sheet manufacturing apparatus 1, pressure is evenly applied to each of the contact surfaces between the conductive portion 22 of the roll 20 and the terminals 11 and 12, the contact of the terminals is stabilized, and the conductive portion 22 is subjected to the pressure. It is possible to stabilize the flowing current. Further, as the use is continued, the terminals 11 and 12 will be worn, but since the pressure is evenly applied to the contact surface between the terminals 11 and 12 and the conductive portion 22, the wear varies. None (or reduced), the replacement cycles of terminals 11 and 12 are reduced.

A method for manufacturing a thermoplastic resin sheet using the sheet manufacturing apparatus 1 according to the present embodiment will be described.

The sheet manufacturing apparatus 1 conducts the first and second terminals 11 and 12 so that the contact surface between the first and second terminals 11 and 12 and the conductive portion 22 of the roll 20A is evenly pressured. It is brought into contact with the portion 22. The thermoplastic resin sheet 30 extruded from the die (not shown) and melted is sent out between the rolls 20A and 20B. Before the predetermined portion of the conductive portion 22 of the roll 20A comes into contact with the molten thermoplastic resin sheet 30, the sheet manufacturing apparatus 1 applies an electric current to the predetermined portion to generate heat. The sheet manufacturing apparatus 1 heats the thermoplastic resin sheet by bringing the predetermined portion into contact with the thermoplastic resin sheet 30. The sheet manufacturing apparatus 1 applies pressure (crimping) between the rolls 20A and 20B to the heated thermoplastic resin sheet 30. At this time, if a fine structure is formed on the circumferential surface (or the conductive portion 22) of the roll 20A and / or the roll 20B, the fine structure is transferred to the thermoplastic resin sheet 30. In this way, the molded thermoplastic resin sheet is manufactured.

The thermoplastic resin is, for example, one or more resins selected from the group consisting of polycarbonate resins, acrylic resins, polystyrene resins, thermoplastic polyester resins, cyclic polyolefin resins, polymethyl-1-pentene resins, and combinations thereof. .. The molded thermoplastic resin sheet to which the fine structure is transferred is, for example, a light diffusion sheet on which a matte pattern is formed, a brightness improving sheet on which a prism pattern is formed, or the like.

(Other embodiments)
In the description of the above embodiment, the configuration in which the terminal units 10A and 10B each have two terminals of the first and second terminals 11 and 12 has been described, but each of the terminal units 10A and 10B has an even number of 4 or more. It may be provided with a terminal of. By further shortening the length of each of the four or more even-numbered terminals in the roll circumferential direction, the pressure unevenness on each contact surface between each terminal and the conductive portion can be further reduced, and an even-numbered number of four or more terminals can be further reduced. The difference in wear due to the use of the contact surface at each of the terminals can be further reduced. Further, a scissors-like mechanism or a ring plier that rotates the first and second holding pieces around the shaft portion 17, which uses each holding piece that holds each terminal and a drive unit that drives each holding piece. By configuring the mechanism so that an even force acts on each of the four or more even-numbered terminals in each terminal unit, the contact between the terminals and the conductive part is stabilized, and as a result, the current is applied to the conductive part. Allows stable flow.

1 Sheet manufacturing equipment 10, 10A, 10B Terminal unit 11 First terminal 11a, 12a Fixture 12 Second terminal 13 Balance device 14 First holding piece 15 Second holding piece 16 Drive unit 16a Drive shaft 16b Drive source 17 Shafts 20, 20A, 20B Roll 21 Roll body 22 Conductive 30 Thermoplastic resin sheet 40 Power supply

Claims (8)

A sheet manufacturing apparatus comprising a pair of rolls arranged apart from each other and pressing a heated thermoplastic resin sheet between the pair of rolls.
A conductive portion that generates heat when an electric current flows is provided on the circumferential surface of at least one of the pair of rolls.
The sheet manufacturing apparatus includes a pair of terminal units for supplying power to the conductive portion.
The pair of terminal units each include a first and second terminal and an equilibrium device that holds the first and second terminals and brings the first and second terminals into contact with the conductive portion. The sheet manufacturing apparatus. The balancing device includes a first holding piece that holds the first terminal at one end, a second holding piece that holds the second terminal at one end, and the first and second holding pieces, respectively. Equipped with a drive unit connected to the other end
The first and second holding pieces are supported by a shaft portion and are supported by a shaft portion.
The sheet manufacturing according to claim 1, wherein the drive unit rotates and displaces the first and second terminals around the shaft portion by adjusting the distance between the other ends and brings them into contact with the conductive portion. Device. Each of the contact surfaces of the first and second terminals in contact with the conductive portion has the same radius of curvature as the circumferential surface of the at least one roll, and is the circumference of the at least one roll in the circumferential direction. The sheet manufacturing apparatus according to claim 1 or 2, which has a length of 1/8 to 1/3. On a plane parallel to the bottom surface of the roll, a straight line connecting the center of the at least one roll and the one end of the first holding piece is a straight line connecting the shaft portion and the one end of the first holding piece. The sheet manufacturing apparatus according to claim 2, wherein the length of the contact surface between the first terminal and the conductive portion in the circumferential direction is divided into two. The sheet manufacturing apparatus according to any one of claims 1 to 4, wherein the first and second terminals are carbon brushes. A microstructure provided on the circumferential surface of at least one roll of the pair of rolls is further provided, and the thermoplastic resin sheet melted between the pair of rolls is pressed to transfer the microstructure to the thermoplastic resin sheet. The sheet manufacturing apparatus to be used.
The sheet manufacturing apparatus according to any one of claims 1 to 5, wherein a power is supplied to the conductive portion to generate heat before the fine structure is transferred to the thermoplastic resin sheet. A method for manufacturing a thermoplastic resin sheet using the sheet manufacturing apparatus according to any one of claims 1 to 6.
The step of bringing the first and second terminals into contact with the conductive portion,
The step of supplying power to the conductive portion and generating heat of the conductive portion,
A step of bringing the thermoplastic resin sheet into contact with the heat-generating conductive portion to heat the thermoplastic resin sheet, and
The manufacturing method comprising a step of pressing the heated thermoplastic resin sheet between the pair of rolls. An equilibrium device used in a sheet manufacturing device that presses a thermoplastic resin sheet heated between a pair of rolls arranged apart from each other.
A first holding piece that holds at one end a first terminal for supplying power to a conductive portion provided on the circumferential surface of at least one of the pair of rolls.
A second holding piece that holds a second terminal for supplying power to the conductive portion at one end, and a second holding piece.
A drive unit connected to the other end of each of the first and second holding pieces is provided.
The first and second holding pieces are supported by a shaft portion and are supported by a shaft portion.
The equilibrium device, wherein the drive unit rotates and displaces the first and second terminals around the shaft portion by adjusting the distance between the other ends, and brings the first and second terminals into contact with the conductive portion.

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