JP2008222347A - Conveying device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To propose a technology for forming a conveying path for conveying a continuously delivering sheet-like object in approximately L-shape by combining an approximately vertical direction and an approximately horizontal direction by utilizing a technology for conveying the sheet-like object (foil object) in a state of being vacuum-sucked to a conveyor belt. <P>SOLUTION: This conveying device is provided with a drive roller 32, a driven roller 31, the endless conveyor belt 33 wound between these rollers and formed with a plurality of suction holes 33a, and a pressure-reduced case 36 sucking the sheet-like object to be conveyed (an electrode base material 9) together with the conveyor belt 33 through the suction holes 33a from the inner peripheral side of the conveyor belt 33, wherein at least a feed side path out of the suction surface of the pressure-reduced case 36 to which the conveyor belt 33 is sucked, is formed in approximately L-shape with the approximately vertical surface and the approximately horizontal surface smoothly joined together, and pressure rollers 35 are provided for pressing the edge parts of the conveyor belt 47 so as to come in pressure contact with the suction surface of the pressure-reduced case 36. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technique for transporting a continuously fed sheet-like body (foil-like body). In particular, the present invention relates to a transport technique suitable for transporting a sheet-shaped (foil-shaped) electrode substrate in a coating apparatus used for manufacturing an electrode foil used for a battery electrode.

Conventionally, an electrode foil in which an active material layer is formed on the surface of a metal foil is used as a battery electrode. For example, in a lithium ion battery, an active material layer containing graphite (carbon) is formed on a copper foil using an electrode foil formed by forming an active material layer containing lithium cobalt oxide (LiCoO ₂ ) on an aluminum foil as a positive electrode. This electrode foil is used as a negative electrode, and these electrode foils are stacked in a plurality of layers.

  The electrode foil is formed by forming an active material layer on a sheet-like (foil-like) electrode base material. In order to form an active material layer on the electrode base material, while the electrode base material (mainly metal foil) wound up in a roll shape is sequentially pulled out and conveyed, a coating material containing an active material, a binder, and a solvent is used. Apply and dry the coating. After that, the active material layer formed on the electrode substrate is pressed to increase the density to obtain an electrode foil.

FIG. 6 is a diagram showing an overall configuration of a conventional coating apparatus. As shown in the figure, the coating apparatus 10 is formed with a transport path R that continuously feeds and transports the electrode base material 9 from the electrode base material 9 wound in a roll shape. In order to form the transport path R, the supply roller 18 that supports the roll of the electrode base material 9, the coating backup roller 11 that receives the coating pressure from the die coater 13, and the electrode base material 9 are sandwiched in order from the transport downstream side. Tension control rollers 16 and 16 and a take-up roller 20 for winding the electrode base material 9 are arranged, and guide rollers 19, 19... Are arranged at appropriate positions between these rollers.
A coating material 12 containing an electrode active material, a binder, and a solvent is applied to the electrode base material 9 conveyed on the coating backup roller 11 by a die coater 13. A conveying path R between the coating backup roller 11 and the tension control rollers 16 and 16 is formed in the drying furnace 15 and applied to the electrode substrate 9 while being conveyed in the drying furnace 15. The coated material 12 is dried.

  In the coating apparatus 10 having the above-described configuration, the electrode base material 9 immediately after the coating material 12 is applied by the die coater 13 cannot be brought into contact with the roller because the coating material 12 is dry. For this reason, the tension control rollers 16 and 16 that determine the conveyance speed and tension of the electrode base material 9 in the conveyance path R are disposed on the conveyance upstream side of the drying furnace 15. Since the drying furnace 15 has a length of several tens of meters, the electrode base material 9 on the coating backup roller 11 disposed downstream of the drying furnace 15 is given sufficient tension for transportation. However, it is difficult to adjust the conveyance speed and tension with high accuracy.

  Moreover, in the coating apparatus 10 having the above-described configuration, the electrode substrate 9 immediately after the coating material 12 is applied by the die coater 13 must be transported with the coating surface of the coating material 12 facing upward, and The roller cannot be brought into contact with the application surface. Accordingly, the degree of freedom of the shape of the transport path R of the electrode base material 9 is low. For example, the trajectory of the transport path R of the electrode base material 9 immediately after the coating material 12 is applied is made substantially L-shaped in a substantially vertical direction. After being lowered, it cannot be introduced into the drying furnace 15 as a substantially parallel direction. For this reason, the highest point of the height of the conveyance path R through the drying furnace 15 is necessarily the same position as the coating backup roller 11 or slightly lower than the coating backup roller 11, and the coating apparatus 10 and the coating apparatus. The building to accommodate 10 was tall.

By the way, conventionally, a technique in which a sheet-like material is vacuum-adsorbed on a conveyance belt and conveyed is known. For example, the technique described in Patent Document 1 prevents the thin plate substrate from being lifted or deformed during application by applying a liquid resist to the thin plate substrate while the thin plate substrate is conveyed while being vacuum-adsorbed on the conveyance belt. However, the liquid resist is stably applied to the thin plate substrate.
JP 2000-151074 A

  In view of the above, in the present invention, a sheet-like body that is continuously drawn out using a technique in which a sheet-like material (foil-like body) is vacuum-adsorbed and conveyed by a conveyance belt is divided into a substantially vertical direction and a substantially horizontal direction. We propose a technique for transporting in a substantially L shape by combining the two.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to the first aspect of the present invention, the driving roller, the driven roller, the endlessly wound conveyance belt formed between the rollers, and the suction belt from the inner peripheral side of the conveyance belt. A decompression case for sucking a sheet-like object to be conveyed together with the conveying belt through a hole, and the depressurization for adsorbing the conveying belt in a conveying device that conveys the object to be conveyed while adsorbed to the conveying belt At least the feeding-side path of the suction surface of the case is formed in a substantially L shape that smoothly connects a substantially vertical surface and a substantially horizontal surface, and the edge of the conveyor belt is pressed to attract the suction surface of the decompression case A pressing roller is provided to be brought into pressure contact therewith.

  According to a second aspect of the present invention, the suction surface of the feeding-side path of the decompression case is composed of a plurality of backup rollers arranged in parallel in a substantially L shape with corners having arc shapes along the transport direction of the transport belt. Is.

  According to a third aspect of the present invention, there is provided a driving roller, a driven roller, an endless conveyor belt that is wound between these rollers, and a plurality of suction holes, and an inner peripheral side of the conveyor belt through the suction holes. At least two sets of conveyance units each having a decompression case that sucks the sheet-like object to be conveyed together with the conveyance belt are provided, and one of the conveyance units conveys the object to be conveyed substantially vertically downward. A vertical conveyance unit is used, and the other conveyance unit is a horizontal conveyance unit that conveys an object to be conveyed in a substantially horizontal direction. The vertical conveyance unit and the horizontal conveyance unit face each other in a substantially parallel manner. Thus, they are arranged adjacent to each other.

  In Claim 4, the displacement detection means which detects the displacement of the surface direction of the to-be-conveyed object conveyed between the said vertical conveyance unit and the said horizontal conveyance unit, and rotation of the drive roller with which the said vertical conveyance unit is equipped. A driving means; a rotation driving means for a driving roller provided in the lateral conveyance unit; and a slack control means for controlling the operation of the two rotation driving means in response to a detection signal from the displacement detection means, If the displacement detected by the displacement detection unit exceeds a predetermined threshold, the control unit determines that the displacement in the surface direction of the object to be conveyed conveyed between the vertical conveyance unit and the horizontal conveyance unit is predetermined. Thus, control is performed to change the rotational speed of one or both of the two rotational drive means so as to fall within the range.

  In Claim 5, it is provided with the base installed in a floor, the board | substrate with which the said horizontal conveyance unit was fixed provided in the substantially horizontal direction with respect to the said base, and the said base with respect to the said base. Substrate driving means for displacing the substrate, displacement detection means for detecting the shake of the object to be conveyed on the upstream side of the conveyance path of the lateral conveyance unit, and controlling the operation of the substrate driving means in response to a detection signal from the displacement detection means Meander control means, and the meander control means has a predetermined swing of the object to be transported by the lateral transport unit if the displacement detected by the displacement detection means exceeds a predetermined threshold. Control for operating the substrate driving means is performed so as to fall within the range.

  As effects of the present invention, the following effects can be obtained.

According to the present invention, a continuously fed sheet-like body can be conveyed in a substantially L shape by combining a substantially vertical direction and a substantially horizontal direction.
In particular, according to the present invention, since one surface of the sheet-like body can be conveyed in a non-contact state with another object, in the coating apparatus used for manufacturing the electrode foil to be the electrode of the battery, the electrode substrate conveyance path It is preferable to use for forming. In this case, the degree of freedom of the shape of the electrode substrate conveyance path is included in the electrode substrate conveyance path by including a conveyance path that continuously conveys a substantially L shape by combining a substantially vertical direction and a substantially horizontal direction. The height of the coating apparatus (drying furnace) can be kept low.

Next, embodiments of the invention will be described.
FIG. 1 is a diagram showing an overall configuration of a coating apparatus provided with an L-shaped conveying device according to the present invention.
FIG. 2 is a side sectional view of the L-shaped transport device according to the first embodiment of the present invention, and FIG. 3 is a rear view of the L-shaped transport device according to the first embodiment of the present invention.
FIG. 4 is a side sectional view of an L-shaped conveying apparatus according to the second embodiment of the present invention, and FIG. 5 is a rear view of the L-shaped conveying apparatus according to the second embodiment of the present invention.
FIG. 6 is a diagram showing an overall configuration of a conventional coating apparatus.

As an example of the present invention, in a coating apparatus used for manufacturing an electrode foil to be an electrode of a battery, an electrode base material that is a sheet-like body (foil-like body) is combined with a substantially vertical direction and a substantially horizontal direction. A technique for transporting in a substantially L shape will be described.
However, the present invention is not limited to the electrode base material, and in a technique for conveying a continuously fed sheet-like body, the sheet-like body is conveyed in a substantially L shape by combining a substantially vertical direction and a substantially horizontal direction. Can be applied to

  FIG. 1 is a schematic diagram of a coating apparatus 10 for forming an active material layer on an electrode substrate 9. As shown in the figure, the coating apparatus 10 is formed with a transport path R that continuously feeds and transports the electrode base material 9 from the electrode base material 9 wound in a roll shape. The transport path R includes a transport path for transporting the electrode base material 9 in a substantially L shape by combining a substantially vertical direction and a substantially horizontal direction.

  In order to form the transport path R, in order from the transport downstream side, a supply roller 18 that supports the roll of the electrode substrate 9, a coating backup roller 11 that receives coating pressure from the die coater 13, an L-shaped transport device 30, Tension control rollers 16 and 16 that sandwich and feed the electrode base material 9 and a winding roller 20 that winds up the electrode base material 9 are disposed, and guide rollers 19, 19... Are disposed at appropriate positions between the rollers. Is done.

  A coating material 12 containing an electrode active material, a binder, and a solvent is applied to the electrode base material 9 conveyed on the coating backup roller 11 by a die coater 13. A conveying path R between the coating backup roller 11 and the tension control rollers 16 and 16 is formed in the drying furnace 15 and applied to the electrode substrate 9 while being conveyed in the drying furnace 15. The coated material 12 is dried.

The L-shaped transport device 30 is for forming a transport path for transporting the electrode base material 9 in a substantially L-shape combining a substantially vertical direction and a substantially horizontal direction. The L-shaped transport device 30 is disposed on the transport upstream side of the transport path R with respect to the die coater 13 and on the transport downstream side of the transport path R with respect to the drying furnace 15.
In the L-shaped conveying device 30, the conveying direction of the electrode substrate 9 immediately after the coating material 12 is applied by the die coater 13 is changed to a substantially vertical downward direction, and subsequently changed to a substantially horizontal direction. Then, the electrode base material 9 whose conveying direction is set to be substantially horizontal by the L-shaped conveying device 30 is carried into the drying furnace 15.

As described above, in the coating apparatus 10 used for manufacturing the electrode foil to be the electrode of the battery, the L-shaped conveying device 30 is provided to form the conveying path R of the electrode base material 9, so that the conveying path R The conveyance path | route which conveys the electrode base material 9 in a substantially L shape combining the substantially vertical direction and a substantially horizontal direction can be included.
Thereby, the freedom degree of the shape of the conveyance path | route R of the electrode base material 9 increases, for example, the side view which combined the substantially vertical direction and the substantially horizontal direction about the conveyance path | route of the electrode base material 9 immediately after apply | coating the coating material 12. The entrance of the electrode base material 9 to the drying furnace 15 can be set to a position sufficiently lower than the coating backup roller 11 in a substantially L shape.
Therefore, the coating apparatus (drying furnace) and the coating apparatus, which have conventionally been a tall building because it is difficult to reduce the conveying height of the electrode base material 9 immediately after the coating material 12 is applied, The height of the house to be accommodated can be suppressed, which can contribute to a reduction in installation space and installation cost of the coating apparatus.

  Next, a detailed configuration of the L-shaped transport device 30 will be described in the following first and second embodiments.

First, Example 1 of the present invention will be described.
As shown in FIGS. 2 and 3, the L-shaped conveying device 30 according to the first embodiment includes a driving roller 32, a driven roller 31, and a plurality of endless suction holes 33 a wound between these rollers. A sheet-like object to be conveyed together with the conveying belt 33 from the inner peripheral side of the conveying belt 33 through the suction holes 33a, 33a,. A decompression case 36 for sucking the electrode substrate 9) is provided at least. In the L-shaped transport device 30, the electrode base material 9 that is a transported object is transported while being attracted to the transport belt 33.

  The endless transport belt 33 has a width larger than the width of the electrode base 9, and the suction holes 33 a, 33 a... Are provided along the transport portion of the transport base 33 of the electrode base 9. It is done. Therefore, the suction holes 33a, 33a,... Are blocked by the electrode base material 9 transported by the transport belt 33. The hole diameters of the suction holes 33a, 33a,... Are adjusted to such a size that the surface of the electrode base material 9 conveyed by the conveyor belt 33 is not deformed.

  The decompression case 36 is disposed between the driving roller 32 and the driven roller 31, and the decompression case 36 is disposed on the inner peripheral side of the feeding side (upper side) path and the return side (lower side) path of the conveyor belt 33. Back-up rollers 34, 34,.. Each of the backup rollers 34, 34,... Is arranged in a posture substantially orthogonal to the conveying direction of the conveying belt 33 (the moving direction of the conveying belt 33), and a plurality of backup rollers 34, 34.

The decompression case 36 is formed between the feed-side and return-side backup rollers 34, 34, and a decompression chamber is formed in the decompression case 36. A suction pipe 37 is connected to the decompression case 26, and the decompression chamber is sucked by the suction blower through the suction pipe 37, so that the gap between the adjacent backup rollers 34 and 34 is set to a negative pressure, The conveyor belt 33 is adsorbed to the decompression case 36.
In this decompression case 36, a partition plate 36a is provided on the return side of the transport belt 33 in the decompression chamber in order to prevent air from being sucked from the return side of the transport belt 33 and reducing the adsorption force of the electrode base material 9. Provided.

Of the suction surface of the decompression case 36 to which the conveyor belt 33 is suctioned, at least the feed-side path is formed in a substantially L shape with a corner portion having an arc shape by smoothly connecting a substantially vertical surface and a substantially horizontal surface. Is done.
In this embodiment, a plurality of backup rollers 34, 34... Arranged in a substantially L-shaped arc along the conveying direction of the conveying belt 33 in the feeding side path of the conveying belt 33. A substantially L-shaped suction surface is formed by smoothly joining the substantially vertical surface and the substantially horizontal surface.

  Further, the edge of the conveyor belt 33 is pressed above the suction surface of the feeding path of the decompression case 36, that is, above the backup rollers 34, 34,. Pressing rollers 35, 35... That are brought into pressure contact with the suction surface of the decompression case 36 are provided. By means of the pressing rollers 35, 35..., The conveyor belt 33 is separated, slackened, or bent along a substantially L shape in which the corners formed by the backup rollers 34, 34. It will move around without turning.

  Therefore, in the feeding side path of the conveyor belt 33, a portion that moves in a substantially vertical direction, a portion that moves in a substantially horizontal direction, and a movement in a substantially arc shape between these portions, the movement direction is changed from a substantially vertical direction. A portion that smoothly transitions in a substantially horizontal direction is included, and the conveyance belt 33 forms a substantially L-shaped conveyance path that combines a substantially vertical direction and a substantially horizontal direction.

As described above, since the gap between the adjacent backup rollers 34 and 34 becomes negative pressure, the conveying belt 33 is sucked into the decompression case 36 by vacuum (decompression), so the suction holes 33a provided in the conveying belt 33 are sucked. ... The electrode base material 9 transported by the transport belt 33 is also sucked into the decompression case 36 through 33a. Thereby, the electrode base material 9 is conveyed in the state of being vacuum-adsorbed (reduced-pressure adsorption) to the conveyor belt 33.
As described above, the electrode base material 9 is attracted to and transported by the transport belt 33, thereby forming a substantially L-shaped transport path that combines a substantially vertical direction and a substantially horizontal direction formed by the transport belt 33. It is conveyed along.

  The electrode base material 9 transported by the L-shaped transport device 30 having the above-described configuration can be transported in a state where the surfaces other than the transport surface attracted to the transport belt 33 are not in contact with other objects. That is, the electrode base material 9 immediately after the coating material 12 is applied by the die coater 13 is transported in a state in which the surface on which the coating material 12 is applied is directed upward without being in contact with other objects. Can do.

  In addition, since the electrode base material 9 moves along with the transport belt 33 that is vacuum-adsorbed, the transport path R moves to the electrode base material 9 by the circumferential movement of the transport belt 33 by the rotational drive of the drive roller 32. Tension is applied. Therefore, the conveyance speed of the electrode base material 9 can be adjusted by adjusting the circumferential speed of the conveyance belt 33 (the rotation speed of the driving roller 32). As described above, the tension of the electrode base material 9 can be adjusted at a position closer to the die coater 13 than the tension control rollers 16 and 16, so that the conveying speed when the coating material 12 is applied to the electrode base material 9 can be adjusted. It becomes possible to adjust with higher accuracy.

Next, a second embodiment of the present invention will be described.
As shown in FIGS. 4 and 5, the L-shaped conveying device 30 according to the second embodiment includes a driving roller 42, a driven roller 43, and a plurality of endless suction holes 47 a wound between these rollers. A sheet-like object to be conveyed together with the conveying belt 47 from the inner peripheral side of the conveying belt 47 through the suction holes 47a, 47a, ... (in this embodiment, At least two sets of transport units including a decompression case 46 for sucking the electrode base material 9) are provided.
Of the at least two sets of transport units, one transport unit is a vertical transport unit 40 that transports the electrode substrate 9 that is a transported object in a substantially vertical downward direction, and the other transport unit is an electrode base. A lateral transport unit 41 that transports the material 9 in a substantially horizontal direction is used. The vertical conveyance unit 40 and the horizontal conveyance unit 41 are arranged adjacent to each other so that the respective driving rollers 42 and 42 face each other substantially in parallel. In this way, in the L-shaped transport device 30, a transport path for transporting the continuously drawn electrode base material 9 in a substantially L shape by combining a substantially vertical direction and a substantially horizontal direction is formed.

In the decompression case 46, backup rollers 44, 44,... Are rotatably supported along both the transporting path on the feeding side and the return side of the transporting belt 47.
The decompression case 46 is formed between the feed-side and return-side backup rollers 44, 44, and a decompression chamber is formed in the decompression case 46. A suction pipe 45 is connected to the decompression case 46, and the decompression chamber is sucked by the suction blower through the suction pipe 45, whereby the gap between the adjacent backup rollers 44 and 44 is set to a negative pressure. The conveyor belt 47 is adsorbed to the decompression case 46.
In this decompression case 46, a partition plate 46a is provided on the return side of the transport belt 47 in the decompression chamber in order to prevent air from being sucked from the return side of the transport belt 47 and reducing the adsorption force of the electrode base material 9. Provided.

  As described above, a negative pressure is generated between the backup rollers 44, 44, so that the transport belt 47 is vacuum-sucked by the backup rollers 44, 44,. Further, the electrode base material 9 transported by the transport belt 47 is sucked into the decompression chamber through the suction holes 47a provided in the transport belt 47, whereby the electrode base material 9 is transported by the transport belt 47. It is conveyed in a state of being vacuum-adsorbed (vacuum-adsorbed).

  Of the two sets of transport units, the lateral transport unit 41 is provided with a meandering correction mechanism 60 in addition to the above configuration. The meandering correction mechanism section 60 is for adjusting the meandering direction of the lateral transport unit 41 to correct the meandering of the electrode base material 9 transported by the lateral transport unit 41.

  The meandering correction mechanism 60 includes a base 64 installed on the floor, a substrate 62 that is provided so as to be relatively displaceable in a substantially horizontal direction with respect to the base 64, and to which the lateral transport unit 41 is fixed. Substrate driving means for displacing the substrate 62 with respect to the base 64, meander detection means 70 as displacement detection means for detecting deflection of the electrode base material 9 on the upstream side of the conveyance path of the lateral conveyance unit 41, and the meandering A meandering control means 69 for receiving the detection signal of the detection means 70 and controlling the operation of the substrate driving means is provided.

  In the present embodiment, the base plate 64 mounted on the floor can turn the substrate 62 that supports the lateral conveyance unit 41 via the support columns 61, 61. It is supported by. Then, the substrate 62 rotates relative to the base 64 about the pivot shaft 63, so that the substrate 62 is relatively displaced with respect to the base 64 in a substantially horizontal direction.

  The substrate driving means includes a ball screw 66 installed on pivot frames 65 and 65 fixed on the upper surface of the base 64, and a slider fixedly installed on the lower surface of the substrate 62 by screwing the ball screw 66. 67 and rotation driving means 68 of the ball screw 66 such as an electric motor. The rotation driving means 68 is connected to a meandering control means 69.

  The meandering detection means 70 is a displacement detection means for detecting the deflection of the electrode base material 9 on the upstream side of the conveyance path of the lateral conveyance unit 41, and is connected to the meandering control means 69. The meandering detection means 70 detects that the electrode substrate 9 to be conveyed is meandering while being shifted in a direction substantially perpendicular to the intended conveying direction. The meander detection means 70 can be, for example, a non-contact type displacement sensor such as a laser type displacement sensor, or a contact type displacement sensor that detects a displacement in contact with the side surface of the electrode base 9.

In the meandering control means 69, if the displacement detected by the meandering detection means 70 exceeds a predetermined threshold, the rotation driving means 68 is operated to cause the substrate 62 to be displaced relative to the base 64. Thus, control is performed to adjust the deflection of the electrode base material 9 conveyed by the lateral conveyance unit 41 to be within a predetermined range.
That is, in the meandering control means 69, if the displacement detected by the meandering detection means 70 exceeds a preset threshold value, the ball screw 66 is moved by a predetermined amount that is related to the displacement amount. Control for operating the rotation driving means 68 so as to rotate forward or backward is performed. As a result, the substrate 62 that supports the lateral conveyance unit 41 rotates in a small amount around the pivot shaft 63 in the direction in which the meandering of the electrode base material 9 is corrected.

  The vertical conveyance unit 40 and the horizontal conveyance unit 41 are arranged so that the respective drive rollers 42 and 42 are substantially parallel and face each other. That is, in the vertical conveyance unit 40, the drive roller 42 is disposed on the upstream side in the conveyance direction, and in the horizontal conveyance unit 41, the drive roller 42 is disposed on the downstream side in the conveyance direction. Between these drive rollers 42 and 42, the conveyance direction of the electrode base material 9 is changed from a substantially vertical direction to a substantially horizontal direction. In the conveyance path R between the vertical conveyance unit 40 and the horizontal conveyance unit 41, the electrode is caused by a slight relative error between the conveyance speed of the conveyance belt 47 of the vertical conveyance unit 40 and the conveyance speed of the conveyance belt 47 of the horizontal conveyance unit 41. There is a possibility that the substrate 9 may be loosened or pulled back.

In view of this, the L-shaped transport device 30 includes a slack adjustment mechanism 50 for adjusting slack of the electrode base material 9 that moves between the vertical transport unit 40 and the horizontal transport unit 41.
The slack adjusting mechanism 50 includes a slack detecting means 51 which is a displacement detecting means for detecting a displacement (slack) in the surface direction of the electrode substrate 9 moving between the vertical transport unit 40 and the horizontal transport unit 41. Is provided. The slack detection means 51 is a non-contact displacement sensor such as a laser displacement sensor.

The slack detection means 51 is connected to a slack control means 49. The slack control means 49 is connected to a rotation drive means 48 for rotating the drive roller 42 of the vertical conveyance unit 40 and a rotation drive means 48 for rotating the drive roller 42 of the horizontal conveyance unit 41.
In the slack control means 49, if the displacement detected by the slack detection means 51 exceeds a predetermined threshold value, the electrode base material 9 transported between the vertical transport unit 40 and the horizontal transport unit 41. Control is performed to change the rotational speed of either one or both of the two rotation driving means 48 and 48 so that the displacement in the surface direction is within a predetermined range. Thereby, the electrode base material 9 conveyed between the vertical conveyance unit 40 and the horizontal conveyance unit 41 is adjusted so that excessive slack or tension is eliminated and always becomes a predetermined slack.

  In the L-shaped conveyance device 30 having the above-described configuration, the vertical conveyance unit 40 and the horizontal conveyance unit 41 form a substantially L-shaped conveyance path that is a combination of a substantially vertical direction and a substantially horizontal direction, and the electrode substrate 9 is vertically In the state where the belts 47 and 47 of the transport unit 40 and the lateral transport unit 41 are attracted by vacuum (decompression), they are transported along the substantially L-shaped transport path.

  Furthermore, the electrode base material 9 transported by the L-shaped transport device 30 can be transported in a state where the surfaces other than the transport surface attracted by the transport belts 47 and 47 are not in contact with other objects. That is, the electrode base material 9 immediately after the coating material 12 is applied by the die coater 13 is transported in a state in which the surface on which the coating material 12 is applied is directed upward without being in contact with other objects. Can do.

  Further, since the electrode base material 9 moves in association with the transport belts 47 and 47 that are vacuum-adsorbed, the electrode base material 9 is moved by the circular movement of the transport belts 47 and 47 by the rotational driving of the drive rollers 42 and 42. A tension for moving the transport path R is applied. Therefore, the conveyance speed of the electrode base material 9 can be adjusted by adjusting the circumferential speed of the conveyance belts 47 and 47 (the rotation speed of the drive rollers 42 and 42). As described above, the tension of the electrode base material 9 can be adjusted at a position closer to the die coater 13 than the tension control rollers 16 and 16, so that the conveying speed when the coating material 12 is applied to the electrode base material 9 can be adjusted. It becomes possible to adjust with higher accuracy.

Further, the L-shaped transport device 30 is provided with the slack adjusting mechanism 50 so that the electrode base 9 between the vertical transport unit 40 and the horizontal transport unit 41 always has a predetermined slack. No excessive slack or tension occurs between the two conveyor belts 47.
The L-shaped transport device 30 is provided with a meandering correction mechanism 60 for correcting the meandering of the electrode base material 9 transported by the L-shaped transport device 30, so that a later process (here, The approach position / posture to the drying furnace 15) can be automatically and satisfactorily adjusted.

The figure which showed the whole structure of the coating device provided with the L-shaped conveying apparatus which concerns on this invention. Side surface sectional drawing of the L-shaped conveying apparatus which concerns on Example 1 of this invention. The rear view of the L-shaped conveying apparatus which concerns on Example 1 of this invention. Side surface sectional drawing of the L-shaped conveying apparatus which concerns on Example 2 of this invention. The rear view of the L-shaped conveying apparatus which concerns on Example 2 of this invention. The figure which showed the whole structure of the conventional coating apparatus.

Explanation of symbols

R conveying path 10 coating device 11 coating backup roller 13 die coater 15 drying furnace 30 L-shaped conveying device 31 driven roller 32 driving roller 33 conveying belt 34 backup roller 35 pressing roller 36 decompression case 40 vertical conveying unit 41 horizontal conveying unit 42 Drive roller 43 Followed roller 50 Slack adjustment mechanism 60 Meander correction mechanism

Claims (5)

A driving roller, a driven roller, an endless conveyor belt wound between these rollers, and a sheet-like sheet together with the conveyor belt from the inner peripheral side of the conveyor belt through the suction hole A depressurizing case that sucks the object to be conveyed, and a conveying device that conveys the object to be conveyed while adsorbed to the conveying belt,
At least the feeding side path of the suction surface of the decompression case to which the transport belt is sucked is formed in a substantially L shape that smoothly connects a substantially vertical surface and a substantially horizontal plane, and an edge of the transport belt is formed. Providing a pressing roller that presses and contacts the suction surface of the decompression case;
Characteristic transport device. The suction surface of the feeding-side path of the decompression case is composed of a plurality of backup rollers arranged in parallel in a substantially L shape with corners having arc shapes along the transport direction of the transport belt.
The transport apparatus according to claim 1. A driving roller, a driven roller, an endless conveyor belt wound between these rollers, and a sheet-like sheet together with the conveyor belt from the inner peripheral side of the conveyor belt through the suction hole Including at least two pairs of transport units each including a decompression case for sucking the object to be transported,
Among the transport units, one transport unit is a vertical transport unit that transports a transported object in a substantially vertical downward direction, and the other transport unit is a horizontal transport unit that transports a transported object in a substantially horizontal direction. ,
The vertical conveyance unit and the horizontal conveyance unit are arranged adjacent to each other so that the respective driving rollers face each other substantially in parallel.
Characteristic transport device. A displacement detecting means for detecting a displacement in a surface direction of an object to be conveyed conveyed between the vertical conveying unit and the horizontal conveying unit;
A rotation driving means of a driving roller provided in the vertical conveyance unit;
Rotation driving means of a driving roller provided in the lateral conveyance unit;
A slack control means for receiving the detection signal of the displacement detection means and controlling the operation of the two rotation driving means,
If the displacement detected by the displacement detection means exceeds a predetermined threshold, the slack control means is a displacement in the surface direction of the object to be conveyed that is conveyed between the vertical conveyance unit and the horizontal conveyance unit. Control is performed to change the rotational speed of either one or both of the two rotational drive means so that is within a predetermined range,
The transport apparatus according to claim 3. A base installed on the floor;
A substrate provided so as to be relatively displaceable in a substantially horizontal direction with respect to the base, and a substrate on which the lateral transfer unit is fixed;
Substrate driving means for displacing the substrate with respect to the base;
A displacement detecting means for detecting a shake of the object to be conveyed on the upstream side of the conveyance path of the horizontal conveyance unit;
Meandering control means for receiving the detection signal of the displacement detection means and controlling the operation of the substrate driving means,
If the displacement detected by the displacement detection unit exceeds a predetermined threshold, the meandering control unit is configured so that the shake of the object conveyed by the lateral conveyance unit falls within a predetermined range. Control is performed to operate the substrate driving means,
The conveying apparatus of Claim 3 or Claim 4.

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