JP5217503B2 - Sheet laminating apparatus and sheet laminating method - Google Patents

Description

  The present invention relates to a sheet laminating apparatus and a sheet laminating method for laminating sheet materials to form a laminated body.

  Lithium ion secondary batteries are made up of a stack of single cells with separators impregnated with electrolyte between the positive and negative electrodes. A device that stacks electrodes and separators is used in the manufacturing process. (For example, see Patent Document 1).

In the apparatus described in Patent Document 1, a separator is laminated on one side and a positive electrode and a negative electrode are laminated on the other side while rotating a lamination table for laminating electrodes and separators. Further, when laminating, the edges of the stacked workpieces are held by a clamper that moves up and down in the stacking direction.
JP-A-2005-50583

  However, in the apparatus described in Patent Document 1 described above, the positive electrode and the negative electrode are stacked at the same rotation position of the stacking table, and the supply paths of the positive electrode and the negative electrode are mixed, so that there is a possibility of foreign matter entering the battery. Will occur. In addition to the drive source for rotating the stacking table, an actuator for driving the clamper is required.

  Accordingly, an object of the present invention is to provide a sheet laminating apparatus and a sheet laminating method that suppress the possibility of foreign matter mixing into the battery as much as possible and do not require another power source for driving the clamper.

  The sheet laminating apparatus according to the present invention that achieves the above object is a laminating apparatus for laminating sheet materials to form a laminate. In the laminating apparatus, a pallet for laminating the sheet material is reciprocated between two laminating positions positioned in pairs in a direction intersecting the conveying direction, and the reciprocating movement of the pallet, A cam mechanism for converting the opening / closing operation of a clamper provided on the pallet to hold the sheet material on the pallet.

  The sheet laminating method according to the present invention that achieves the above object is a laminating method for laminating sheet materials to form a laminate. A pallet for laminating the sheet material is reciprocated between two laminating positions located in pairs in a direction crossing the conveying direction, and the reciprocating movement of the pallet is performed by a cam mechanism. The operation is converted into an opening / closing operation of a clamper provided on the pallet to be gripped by the pallet, and the clamper is opened / closed.

  The sheet laminating apparatus according to the present invention configured as described above is provided with a moving device that reciprocates between the laminating positions in the direction intersecting the conveying direction. Can be separated, and contamination with foreign matter in the laminate can be suppressed. Further, since a cam mechanism for converting the reciprocating movement of the pallet into the opening / closing operation of the clamper is provided, another power source for driving the clamper is not required.

  Since the sheet stacking method according to the present invention configured as described above is reciprocated in the direction intersecting the transport direction, the stacking position of the sheet material can be separated, and contamination with foreign matter in the stack can be suppressed. Further, since the reciprocating movement of the pallet is converted into the opening / closing operation of the clamper to open / close the clamper, no other power source for driving the clamper is required.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the dimension ratio of drawing is exaggerated on account of description, and may differ from an actual ratio.

  FIG. 1 is a schematic sectional view showing one embodiment of a battery element of a lithium ion secondary battery, FIG. 2 is a schematic plan view showing a sheet laminating apparatus according to this embodiment, and FIG. 3 shows a pallet of this embodiment. FIG. 4 is a perspective view showing the pallet, FIG. 5 is a perspective view showing a clamper used in the pallet, and FIG. 6 is a side view for explaining the operation of the clamper. FIG. 7 is a plan view showing the reciprocating device of the present embodiment, FIG. 8 is a side view showing the reciprocating device, and FIG. 9 is a partial perspective view showing only the upper part of the reciprocating device.

  As shown in FIG. 1, the stacked battery is, for example, a lithium ion secondary battery 1 and has a structure in which a battery element in which a charge / discharge reaction actually proceeds is enclosed in an aluminum laminate sheet 3 that is an exterior. Have. The battery element (laminated body) includes a positive electrode 4 in which a positive electrode active material layer containing a positive electrode active material is formed on the surface of the positive electrode current collector, an electrolyte layer 5 containing an electrolyte, and a negative electrode active material on the surface of the negative electrode current collector A unit cell in which a negative electrode 6 formed by forming a negative electrode active material layer containing is laminated in this order is included. The electrolyte layer 5 has a configuration in which the electrolytic solution is held by the separator 2 for holding the electrolytic solution. The positive electrode 4 is electrically connected to a positive electrode terminal 7 for extracting current to the outside, and the negative electrode 6 is electrically connected to a negative electrode terminal 8 for extracting current to the outside. Note that the number of single cells constituting the battery element is not particularly limited, and is appropriately determined in consideration of a desired battery capacity and battery output.

  As shown in FIG. 2, the sheet stacking apparatus 10 according to the present embodiment includes a separator supply unit 20, a positive electrode supply unit 30, a negative electrode supply unit 40, and an electrode stacking unit 50.

  The positive electrode supply unit 30 cuts the raw material of the positive electrode 4 (sheet material) from the positive electrode roll 31 into a predetermined size by the cutting device 32, and sequentially stacks the cut positive electrodes 4 on the positive electrode magazine 34 by the robot hand 33. The positive electrode magazine 34 on which the positive electrodes 4 are stacked is transferred to the vicinity of the electrode stacking unit 50.

  The negative electrode supply unit 40 cuts the negative electrode 6 (sheet material) from the negative electrode roll 41 into a predetermined size while drawing the raw material of the negative electrode 6 (sheet material), and sequentially stacks the cut negative electrode 6 on the negative electrode magazine 44 by the robot hand 43. The negative electrode magazine 44 on which the negative electrodes 6 are stacked is transferred to the vicinity of the electrode stacking unit 50.

  The separator supply unit 20 cuts the separator 2 (sheet material) from the separator roll 21 into a predetermined size while drawing the raw material of the separator 2 (sheet material), and sequentially supplies the cut separator 2.

  The electrode stacking unit 50 includes a transport device 70 that transports the pallet 60, a reciprocating device 80 that reciprocates the pallet 60 in a direction intersecting the transport direction of the pallet 60, a positive electrode stacking robot 51, and a negative electrode stacking robot 52. Have. The positive electrode stacking robot 51 and the negative electrode stacking robot 52 are disposed on both sides of the transfer device 70, and the positive electrode magazine 34 and the negative electrode magazine 44 are disposed in the vicinity of the positive electrode stacking robot 51 and the negative electrode stacking robot 52, respectively. The separator supply unit 20 is also disposed in the vicinity of the positive electrode stacking robot 51 and the negative electrode stacking robot 52.

  Two positive electrode stacking robots 51 are provided, and the positive electrode magazine 34 is disposed in the vicinity of each of the positive electrode stacking robots 51. One of the separator supply units 20 is disposed in the vicinity of the positive electrode stacking robot 51.

  Two negative electrode stacking robots 52 are provided, and a negative electrode magazine 44 is disposed in the vicinity of each negative electrode stacking robot 52. Another separator supply unit 20 is disposed in the vicinity of the negative electrode stacking robot 52.

  Each of the positive and negative laminated robots 51 and 52 includes a suction hand 53 that sucks and holds two works (separator 2, positive electrode 4 or negative electrode 6) simultaneously.

  Two reciprocating devices 80 are provided side by side in the transport direction, and can reciprocate individually. The number of installed reciprocating devices 80 corresponds to the number of installed positive and negative electrode stacking robots 51, 52, that is, the pallets 60 held on the reciprocating devices 80 are respectively associated with the corresponding positive and negative electrodes. The electrodes 4 and 6 are stacked in parallel by the stacking robots 51 and 52.

  As shown in FIGS. 3 and 4, each pallet 60 is provided with two first and second placement areas A1 and A2 (placement surfaces) in the conveying direction, and two stacked structures can be simultaneously attached. Stacking is possible. A plurality of positioning pins 61 for positioning the edge of the workpiece are provided around each of the first and second placement areas A1 and A2.

  Two positioning holes 62 for conveyance through which the conveyance pins 71 provided in the conveyance device 70 are inserted are formed at diagonal ends of the pallet 60. The pallet 60 is formed with two reciprocating positioning holes 63 through which reciprocating pins 83 provided in the reciprocating device 80 are inserted.

  Around the first and second placement areas A1 and A2, a clamper 64 is provided for gripping the work to be placed. The clamper 64 is provided between the first and second clampers 64A and 64B that grip one side of the workpiece in the first placement area A1, and the first and second placement areas A1 and A2. , Third and fourth clampers 64C and 64D for gripping one side of the workpiece in the second placement area A1 and A2, and fifth and fifth for gripping one side of the work in the second placement area A2. 6 clampers 64E and 64F.

  Each clamper 64 passes through a clamper hole 65 formed in the pallet 60. As shown in FIG. 5, the clamper 64 is slidably inserted through a clamp head 66 located on the surface side of the pallet 60 where the first and second placement areas A1 and A2 are provided, and a clamper hole 65. And a support pin 67. At the end portion of the support pin 67, a contact portion 67X is formed that contacts a linear cam 86 described later and functions as a contact. The support pin 67 penetrates the spring member S, and the clamp head 66 is biased to the pallet 60 by the spring member S applying a reaction force between the pallet 60 and the contact portion 67X.

  As shown in FIG. 6, a cam groove 68 that is a groove extending in the extending direction and the rotating direction of the pin is formed on the side surface of the support pin 67. The clamper hole 65 is formed with a convex portion 69 so as to fit into the cam groove 68. The convex portion 69 functions as a contact for the cam groove 68. The cam groove 68 and the convex portion 69 function as a rotating cam mechanism that rotates the clamper 64 when the clamper 64 moves back and forth (slids) up and down with respect to the pallet 60. The convex portion may be formed on the support pin 67 and the cam groove may be formed on the clamper hole 65.

  In the present embodiment, as shown in FIG. 6A, the clamper 64 rises without rotating until the interval X rises, and when it rises beyond the interval X, as shown in FIG. The clamper 64 rises while rotating according to the shape of the groove 68. By making the distance X larger than the maximum stack thickness of the workpieces, it is possible to prevent rubbing between the clamp head 66 and the stacked workpieces.

  As shown in FIGS. 7 and 8, the conveyance device 70 includes two rows of conveyance units 73 that move on the conveyance rail 74, and a holding surface 72 that holds the pallet 60 is formed in each conveyance unit 73. . The holding surface 72 is formed with a transfer pin 71 that is inserted and held through the transfer positioning hole 62 of the pallet 60. The holding surface 72 can be moved up and down, and the held pallet 60 can be transferred to the reciprocating device 80 or received from the pallet 60 from the reciprocating device 80.

  As shown in FIGS. 7 to 9, the reciprocating device 80 includes a fixedly provided main body portion 81 and a pallet holding portion 82 that is positioned above the main body portion 81 and holds the pallet 60. . The pallet holding part 82 is formed of a frame, and two reciprocating pins 83 that pass through the positioning hole 63 for reciprocating movement of the pallet 60 are formed at the diagonal. The pallet holding part 82 can be reciprocated perpendicularly to the transport direction by a uniaxial cylinder 84 provided in the main body part 81.

  On the upper surface of the main body portion 81, a cam surface 85 that contacts the contact portion 67X of the clamper 64 is formed. On the cam surface 85, first to sixth linear cams 86A to 86F are formed in the reciprocating direction of each contact portion 67X so as to contact the contact portions 67X of the first to sixth clampers 64A to 64F. The first to sixth linear cams 86 </ b> A to 86 </ b> F are formed so as to be inclined from the cam surface 85.

  The first, fourth, and fifth linear cams 86A, 86D, and 86E are contact portions 67X of the first, fourth, and fifth clampers 64A, 64D, and 64E when the pallet 60 moves to the stacking position on one side (for example, the positive electrode side). It is formed in the part which touches. The second, third, and sixth linear cams 86B, 86C, and 86F are the contact portions 67X of the second, third, and sixth clampers 64B, 64C, and 64F when the pallet 60 is moved to the stacking position on the other side (for example, the negative electrode side). It is formed in the part which touches.

  The first to sixth linear cams 86 </ b> A to 86 </ b> F can be moved back and forth in the reciprocating direction along the cam surface 85 by the actuator 87.

  The contact part 67X of the first to sixth clampers 64A to 64F and the first to sixth linear cams 86A to 86F move the clampers 64A to 64F up and down with respect to the pallet 60 as the contact part 67X reciprocates. Functions as a linear cam mechanism for sliding.

  Above each reciprocating device 80, a camera 88 is provided for confirming the stacking state of the workpieces during stacking.

  Next, the operation of the sheet stacking apparatus 10 according to the present embodiment will be described.

  10 is a front view showing when the pallet is installed in the reciprocating device, FIG. 11 is a side view corresponding to FIG. 10, and FIG. 12 is a front view showing when the pallet is moved to the positive electrode side by the reciprocating device. 13 is a side view corresponding to FIG. 12, FIG. 14 is a plan view showing when the separator 2 and the positive electrode are installed on the pallet, and FIG. 15 moves the linear cam with the pallet moved to the positive electrode side. FIG. 16 is a side view corresponding to FIG. 15, FIG. 17 is a plan view showing when the pallet is moved to the negative electrode side in a state where a work is installed on the pallet, and FIG. FIG. 19 is a side view corresponding to FIG. 18, FIG. 20 is a plan view showing a separator and a negative electrode installed on the pallet, and FIG. Move the pallet to the negative side In a state, a front view showing a when moving the linear cam, FIG. 22 is a side view corresponding to FIG. 21.

  In order to stack the electrodes 4 and 6, first, as shown in FIGS. 10 and 11, the pallet 60 is transported above the reciprocating device 80 by the transport device 70. Since two reciprocating devices 80 are provided, the pallet 60 is transported to each of the reciprocating devices 80. However, since the operation of each of the reciprocating devices 80 is the same, one reciprocating motion is performed thereafter. Only the device 80 will be described.

  After the pallet 60 is conveyed above the reciprocating device 80, the holding surface 72 of the conveying device 70 is lowered, and the pallet 60 is moved to the pallet holding unit 82 of the reciprocating device 80. As a result, the conveying pin 71 of the holding surface 72 is pulled out from the conveying positioning hole 62 of the pallet 60, the reciprocating pin 83 of the pallet holding part 82 is inserted into the reciprocating positioning hole 63, and the pallet 60 becomes the pallet. It is held by the holding unit 82. At this time, the contact portions 67X of the first to sixth clampers 64A to 64F are in contact with the cam surface 85, but are not in contact with the first to sixth linear cams 86A to 86F, and all the clampers 64 are closed. ing. Here, the closed state means a state in which the clamper 64 is lowered and grips the edges of the placement areas A1 and A2 (see FIG. 6A), and an open state means that the clamper 64 is rotated while being raised. This means a state separated from the edges of the placement areas A1 and A2 (see FIG. 6C).

  Thereafter, as shown in FIGS. 12 and 13, the uniaxial cylinder 84 is driven to reciprocate the pallet holding portion 82 and move to one side (for example, the positive electrode side). As a result, the contact portions 67X of the first, fourth, and fifth clampers 64A, 64D, and 64E come into contact with the first, fourth, and fifth linear cams 86A, 86D, and 86E, and the first, fourth, and fifth clampers 64A, 64D, and 64E. Is rotated while rising, and an opening operation (clamping operation) is performed to enter an open state.

  Thereafter, the suction hand 53 of the positive electrode stacking robot 51 is moved to the separator supply unit 20, the two separators 2 are simultaneously sucked and held by the suction hand 53, and the suction hand 53 is moved to the positive electrode magazine 34 (see FIG. 2). Since the separator 2 has air permeability, the positive electrode 4 can be further superposed and sucked and held by a suction hand 53 that sucks and holds the separator 2.

  Thereafter, as shown in FIG. 14, the suction hand 53 is moved to the pallet 60, and the two sets of the separator 2 and the positive electrode 4 held by the suction hand 53 are placed in the first and second placement regions with the positive electrode 4 facing downward. Place on A1 and A2. At this time, since the second, third, and sixth clampers 64B, 64C, and 64F are in the closed state, the positive electrode 4 is in contact with the second, third, and sixth clampers 64B, 64C, and 64F. Since 64A, 64D, and 64E are in the open state, the first, fourth, and fifth clampers 64A, 64D, and 64E are not in contact with the positive electrode 4.

  Next, as shown in FIGS. 15 and 16, the first, fourth, and fifth linear cams 86 </ b> A, 86 </ b> D, and 86 </ b> E are moved by the actuator 87. As a result, the first, fourth, and fifth linear cams 86A, 86D, and 86E are displaced from below the contact portion 67X of the first, fourth, and fifth clampers 64A, 64D, and 64E, and the first, fourth, and fifth clampers 64A, 64D, and 64E. Is lowered and a closing operation (unclamping operation) is performed to enter a closed state. As a result, the separator 2 and the positive electrode 4 placed in the first and second placement regions A1 and A2 are gripped by the diagonal edges. Since the positive electrode 4 is located under the separator 2, the first, fourth, and fifth clampers 64 </ b> A, 64 </ b> D, and 64 </ b> E are not in contact with the positive electrode 4 even when gripped.

  Next, as shown in FIG. 17, the pallet holding part 82 holding the separator 2 and the positive electrode 4 is reciprocated and moved to the negative electrode side. At this time, since the separator 2 and the positive electrode 4 are held at the diagonal edges by the first, fourth, and fifth clampers 64A, 64D, and 64E, they are held well.

  Thereafter, as shown in FIGS. 18 and 19, the pallet holding portion 82 moves to the other side (for example, the negative electrode side). As a result, the contact portions 67X of the second, third and sixth clampers 64B, 64C and 64F come into contact with the second and third and sixth linear cams 86B, 86C and 86F, and the second, third and sixth clampers 64B, 64C and 64F. Is rotated while rising, and an opening operation (clamping operation) is performed to enter an open state.

  Thereafter, the suction hand 53 of the negative electrode stacking robot 52 is moved to the separator supply unit 20, the two separators 2 are simultaneously sucked and held by the suction hand 53, and the suction hand 53 is moved to the negative electrode magazine 44 (see FIG. 2). Since the separator 2 has air permeability, the positive electrode 4 can be further superposed and sucked and held by a suction hand 53 that sucks and holds the separator 2.

  Thereafter, as shown in FIG. 20, the suction hand 53 is moved to the pallet 60, and the two sets of separators 2 and the negative electrode 6 held by the suction hand 53 are placed in the first and second placement regions with the negative electrode 6 facing downward. Place on A1 and A2. At this time, since the first, fourth, and fifth clampers 64A, 64D, and 64E are in the closed state, the negative electrode 6 is in contact with the first, fourth, and fifth clampers 64A, 64D, and 64E. Since 64B, 64C, and 64F are in the open state, the second, third, and sixth clampers 64B, 64C, and 64F do not contact the negative electrode 6.

  Next, as shown in FIGS. 21 and 22, the second, third, and sixth linear cams 86 </ b> B, 86 </ b> C, and 86 </ b> F are moved by the actuator 87. As a result, the second, third and sixth linear cams 86B, 86C and 86F are displaced from below the contact portion 67X of the second, third and sixth clampers 64B, 64C and 64F, and the second, third and sixth clampers 64B, 64C and 64F. Is lowered and a closing operation (unclamping operation) is performed to enter a closed state. As a result, the separator 2 and the negative electrode 6 placed on the first and second placement areas A1 and A2 are gripped by the diagonal edges. Since the negative electrode 6 is located below the separator 2, the second, third, and sixth clampers 64 </ b> B, 64 </ b> C, and 64 </ b> F do not contact the negative electrode 6 even when gripped.

  Thereafter, the pallet holding part 82 is moved back and forth again to move to the positive electrode side. At this time, since the separator 2 and the negative electrode 6 are held at the diagonal edges by the second, third, and sixth clampers 64B, 64C, and 64F, they are held well.

  Thereafter, a predetermined number of positive electrodes 4, negative electrodes 6, and separators 2 are stacked while repeating the above-described reciprocation to the positive electrode side and the negative electrode side, whereby a stacked battery structure is manufactured.

  According to the sheet stacking apparatus 10 according to the present embodiment, the first to sixth clampers 64A to 64F can be opened and closed by the cam mechanism using the reciprocating movement of the pallet 60 in the direction intersecting the transport direction. There is no need to provide a power source. Therefore, the cost of the device can be reduced, the weight can be reduced, and the durability can be improved.

  In addition, a plurality of (two in the present embodiment) structures can be stacked on the same pallet 60, and even in such a case, the clamper 64 can be opened and closed using the reciprocating movement of the pallet 60. Further cost reduction, weight reduction and durability improvement can be achieved.

  In addition, since the positive electrode 4 and the negative electrode 6 are laminated on both sides by reciprocating the pallet 60, the region where the positive electrode 4 and the negative electrode 6 are laminated can be divided, and the occurrence of contamination can be suppressed.

  In addition, by dividing the region where the positive electrode 4 and the negative electrode 6 are laminated, it is possible to suppress erroneous input of the positive electrode 4 and the negative electrode 6 during lamination.

  Further, since the pallet 60 is stacked while reciprocating in the direction intersecting the transport direction, the supply path of the positive electrode 4 and the negative electrode 6 at the time of stacking is on the opposite side across the transport path of the pallet 60, and the positive electrode 4 and the negative electrode The six transport paths are not mixed, and interference between the respective stacking steps can be prevented. Thereby, even if the speed of the stacking process is increased, interference between robots and workpieces can be suppressed.

  Further, since the pallet 60 reciprocates in a direction intersecting the conveyance direction, a work quality control camera 88 can be fixedly provided at a position that does not interfere with the stacking process, and the camera 88 is moved each time. There is no need to let them.

  In addition, since the first to sixth linear cams 86A to 86F can move back and forth in the reciprocating movement direction along the cam surface 85, the clamper 64 can be used even in the stopped state before the pallet 60 reciprocates. Can be closed. Although it is possible not to apply such a structure, in that case, the clamper 64 is not closed until the pallet 60 starts reciprocating movement, and an operation delay for gripping the workpiece occurs. It becomes.

  Further, by using the rotating cam mechanism, the clamper 64 can be moved in the vertical direction and the rotational direction, and compared with a clamper that only moves in the vertical direction, the interference between the workpiece and the clamper 64 can be reduced, and the problem can be solved. Generation can be reduced. In particular, in the present embodiment, since the clamper 64 starts to rotate at a position exceeding the maximum lamination thickness of the workpiece, no friction is generated between the clamper 64 and the workpiece, and the interference between the workpiece and the clamper 64 is further reduced. It is difficult for trouble to occur.

  Further, by changing the shape of the cam groove 68 of the rotating cam mechanism, the opening / closing timing of the clamper 64, the escape direction and the height of the clamper 64 can be arbitrarily set. Therefore, even if the shape or thickness of the workpiece changes, it can be easily handled.

  Further, the first, fourth, and fifth clampers 64A, 64D, and 64E that are in contact with the negative electrode 6 are not in contact with the positive electrode 4, and the second, third, and sixth clampers 64B, 64C, and 64F that are in contact with the positive electrode 4 are not in contact with the negative electrode 6. Foreign matter contamination can be reduced more reliably.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the claims. For example, the reciprocating device 80 is not limited to two, and may be one or three or more. Further, the number of structures stacked on one pallet 60 is not limited to two.

  FIG. 23 is a plan view showing another example of a pallet. A plurality of clampers 64 that perform the same operation are connected by connecting means 90 such as a belt or a chain as shown by broken lines. The clamper 64 can be opened and closed with only one linear cam. Thereby, the cost reduction of an apparatus, weight reduction, and the improvement of durability can be aimed at.

It is a schematic sectional drawing which shows one form of the battery element of a lithium ion secondary battery. It is a schematic plan view which shows the sheet | seat lamination apparatus which concerns on this embodiment. It is a top view which shows the pallet of this embodiment. It is a perspective view which shows the pallet. It is a perspective view which shows the clamper used for the pallet. It is a side view for demonstrating operation | movement of the clamper, (A) is before raising, (B) is raising, (C) shows after raising. It is a top view which shows the reciprocating device of this embodiment. It is a side view which shows the same reciprocating device. It is a fragmentary perspective view which shows only the upper part of the same reciprocating device. It is a front view which shows the time of installing a pallet in a reciprocating device. It is a side view corresponding to FIG. It is a front view which shows the time of moving a pallet to the positive electrode side with a reciprocating device. FIG. 13 is a side view corresponding to FIG. 12. It is a top view which shows the time of installing a separator and a positive electrode in a pallet. It is a front view which shows the time of moving a linear cam in the state which moved the pallet to the positive electrode side. FIG. 16 is a side view corresponding to FIG. 15. It is a top view which shows the time of moving a pallet to the negative electrode side in the state which installed the workpiece | work in the pallet. It is a front view which shows the time of moving a pallet to the negative electrode side with a reciprocating device. It is a side view corresponding to FIG. It is a top view which shows the time of installing the separator and the negative electrode on the pallet. It is a front view which shows the time of moving a linear cam in the state which moved the pallet to the negative electrode side. FIG. 22 is a side view corresponding to FIG. 21. It is a top view which shows the other example of a pallet.

Explanation of symbols

1 Lithium ion secondary battery (stacked battery),
2 separator,
4 Positive electrode (electrode),
6 negative electrode (electrode),
10 sheet laminating equipment,
60 palettes,
64 Clamper,
64A-64F 1st-6th clamper,
65 Clamper hole,
66 Clamp head,
67 support pins,
67X contact part,
68 Cam groove,
69 convex part,
70 conveying device,
80 reciprocating device,
86A-86F 1st-6th linear cam,
90 chain (connection means),
A1 first mounting area,
A2 Second mounting area,
X interval.

Claims (9)

A sheet laminating apparatus for laminating sheet materials to form a laminate,
A moving device for reciprocating a pallet for laminating the sheet material between two laminating positions located in pairs in a direction intersecting the conveying direction;
And a cam mechanism for converting the reciprocating movement of the pallet into an opening / closing operation of a clamper provided on the pallet for gripping the sheet material on the pallet. The cam mechanism includes a linear cam mechanism that linearly moves the clamper from a mounting surface on which the sheet material is stacked.
The sheet laminating apparatus according to claim 1, further comprising: a rotating cam mechanism that rotates the clamper along the placement surface.   The linear cam mechanism includes: a contact portion that is formed on the clamper and serves as a contact; and a linear cam that is positioned in a reciprocating movement direction of the pallet with respect to the contact portion. The sheet laminating apparatus described. The stacked sheet materials are a positive electrode, a negative electrode, and a separator of a battery, and different sheet materials are stacked on the pallet at the two stack positions.
4. The linear cam mechanism according to claim 2, wherein the linear cam mechanism opens and closes different clampers of the pallet at the two stacking positions to change the clampers according to the type of sheet material to be stacked. 5. Sheet laminating device.   The rotating cam mechanism has a convex portion provided in one of the clamper and a hole portion of a pallet through which the clamper penetrates to be a contact, and a cam groove provided in the other and into which the convex portion is fitted. The sheet laminating apparatus according to claim 2 or 3, wherein   6. The sheet lamination according to claim 5, wherein the rotating cam mechanism is formed so as to rotate when the clamp is separated from a maximum lamination thickness of the sheet material laminated on the placement surface. apparatus.   The sheet laminating apparatus according to claim 3, wherein the linear cam is provided to be movable along the reciprocating direction.   The sheet laminating apparatus according to any one of claims 1 to 7, wherein a plurality of the clampers are provided, and a connecting unit that connects at least two of the clampers so as to rotate synchronously. A laminating method for laminating sheet materials to form a laminate,
A pallet for laminating the sheet material is reciprocated between two laminating positions located in pairs in a direction crossing the conveying direction, and the reciprocating movement of the pallet is performed by a cam mechanism. A sheet laminating method, wherein the sheet is converted into an opening / closing operation of a clamper provided on the pallet to be gripped by the pallet, and the clamper is opened / closed.

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