JP7214395B2 - Laminated core manufacturing method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a laminated core manufacturing method for manufacturing a laminated core by laminating plate-shaped pieces used for the laminated core.

2. Description of the Related Art Laminated cores in which magnetic steel sheets are laminated are known as cores constituting static induction devices such as transformers. Also known is an automatic core stacking device that manufactures a laminated core by automatically laminating plate-like pieces used in such a laminated core (see, for example, Patent Document 1).

JP-A-2001-167962

However, the conventional automatic core stacking apparatus manufactures laminated cores by transporting plate-shaped pieces (cores) by a belt conveyor and dropping the transported plate-shaped pieces at the stacking position. Therefore, for example, when manufacturing an E-shaped core lamination having a yoke and two side legs and a center leg joined to the yoke, the position of the yoke, each position of the two side legs, the center There was a problem that a system for transporting the plate-like piece to each of the leg positions had to be constructed, resulting in a large-scale apparatus.

SUMMARY OF THE INVENTION An object of the present invention is to provide a laminated core manufacturing method capable of efficiently manufacturing a laminated core on a smaller scale.

In order to achieve the above object, a method for manufacturing a laminated core according to the present invention includes a step of forming a plate-like piece block by stacking plate-like pieces used in a laminated core, and a step of transporting the plate-like piece block constructed by the step. and a step of manufacturing a laminated core by laminating.
With such a configuration, it is possible to manufacture a laminated core by first constructing a plate-like piece block and then transporting and stacking the plate-like piece block, which makes it possible to manufacture a smaller core than a conventional automatic core stacking device. Laminated cores can be manufactured on a scale. For example, even when manufacturing an E-shaped core laminate, there is no need to install a belt conveyor up to the lamination positions of the yokes, side legs, and center legs. Also, changes in the shape and size of the iron cores to be laminated can be handled by changing the moving destination, and work such as changing the arrangement position of the belt conveyor is not required. In addition, since the operation of forming the plate-shaped piece blocks and the operation of stacking the plate-shaped piece blocks can be performed in parallel, the work efficiency can be improved.

Further, in the method for manufacturing the laminated core according to the present invention, in the step of forming the plate-like piece block, the plate-like piece block may be formed by stacking the plate-like pieces while shifting them in the longitudinal direction.
With such a configuration, for example, a laminated core having step lap joints can be configured.

Further, in the laminated core manufacturing method according to the present invention, the laminated core includes the first and second yokes, the first and second side legs, and the center leg. It is a portion composed of a leg and a central leg, and the joining portion of the plate-like piece between both ends of the central leg and the central portions of the first and second yokes is a V cut on the first and second yoke sides. It may be a step-lap joint in which the plate-like pieces are sequentially displaced in the longitudinal direction of the central leg.
With such a configuration, the joints of the plate-like pieces between both ends of the central leg and the central portions of the first and second yokes can be step-lap jointed, for example, reduction of iron loss and noise reduction. benefits are obtained.

Further, in the method for manufacturing a laminated core according to the present invention, in the step of forming the plate-like piece block, the plate-like piece block is formed on the base, and in the base, the plurality of plate-like pieces extending in the width direction of the plate-like piece arranged on the base The recesses are arranged in parallel along the longitudinal direction of the plate-shaped piece, and the step of manufacturing the laminated core by transporting and stacking the plate-shaped piece blocks is such that they can be inserted into the plurality of recesses of the base. A step of lifting and conveying the plate-like piece block on the table by a fork portion having a plurality of teeth arranged parallel to the fork portion; may have
With such a configuration, the plate-like piece blocks can be picked up from the stand by the fork portion, and the plate-like piece blocks can be lowered and stacked at the stacking position.

Further, in the laminated core manufacturing method according to the present invention, in the step of stacking the plate-like piece blocks to be conveyed at the stacking position, when the plate-like piece blocks to be conveyed are at the stacking position, the plurality of teeth are arranged in the longitudinal direction. Plate-like piece blocks may be stacked by retracting a plurality of teeth on the fork base side that is held reciprocally.
With such a configuration, the plate-shaped piece blocks can be stacked by retracting the plurality of teeth at the stacking position, and the stacking of the plate-shaped piece blocks can be realized in a space-saving manner.

Further, in the laminated core manufacturing method according to the present invention, the plurality of teeth are divided into first and second groups, and the teeth of the first and second groups are independently movable forward and backward, and the plate-like piece to be conveyed In the process of stacking the blocks at the stacking position, the teeth of the first group are retracted toward the base of the fork, and the teeth of the first group are eliminated by the stack pressing mechanism that presses down the plate-shaped block to be stacked. position, the plate-like piece block is pressed downward, and in a state in which the plate-like piece block is pressed downward by the stacking pressing mechanism, the teeth of the second group are retracted toward the fork base side, and the plate-like piece is held by the stacking pressing mechanism. You may release the holding of the single block.
With such a configuration, it is possible to prevent displacement of the plate-shaped piece blocks to be stacked when stacking the plate-shaped piece blocks.

Further, in the laminated core manufacturing method according to the present invention, in the step of stacking the plate-like piece blocks to be conveyed at the stacking position, when the plurality of teeth are retracted, the plate-like piece blocks to be laminated are moved by the plate-like piece block stopper. movement in the backward direction may be prevented.
With such a configuration, the plate-like piece block stopper can prevent the plate-like piece block to be stacked from shifting in the backward direction.

Further, a laminated core manufacturing system according to the present invention includes a stacking device for forming a plate-shaped piece block by stacking plate-shaped pieces used for a laminated core while shifting them in the longitudinal direction, and a plate-shaped piece block constituted by the stacking device. A laminated core manufacturing system comprising: a conveying and laminating device that manufactures a laminated core by conveying and laminating the A conveying part that conveys the plate-like piece while holding the upper surface side and releases the holding of the plate-like piece above the stacking table, and a plate-like piece that positions the front end of the plate-like piece in the longitudinal direction on the stacking table a piece stopper, a plate piece stopper moving mechanism for moving the plate piece stopper to a position corresponding to the plate piece to be conveyed, and a front end of the plate piece released from the holding by the conveying section on the stacking table. By moving the holding part holding the plate-like piece and the holding part holding the front end of the plate-like piece over the plate-like piece stopper in the longitudinal direction of the plate-like piece, the plate-like piece stopper is placed on the stacking table. a holding part moving mechanism for arranging the plate-like piece at the positioned position, wherein the plurality of concave portions extending in the lateral direction of the plate-like piece arranged on the stacking table are arranged on the plate-like piece. The conveying and stacking device is arranged in parallel along the longitudinal direction, and includes a fork portion having a plurality of teeth arranged in parallel and insertable into a plurality of recesses of the stacking table, and a plate-like piece on the stacking table. a fork portion moving mechanism for moving the fork portion so that the fork portion lifts and conveys the blocks and stacks the blocks at the stacking position.
With such a configuration, a laminated core can be manufactured by constructing a plate-like piece block by a stacking device, and conveying and stacking the plate-like piece block by a conveying and laminating device, and a conventional automatic core stacking device. The laminated core can be manufactured on a smaller scale compared to the conventional method. For example, even when manufacturing an E-shaped core laminate, there is no need to install a belt conveyor up to the lamination positions of the yokes, side legs, and center legs. In addition, changes in the shape and size of the iron core to be stacked can be handled by changing the destination of the fork movement by the fork movement mechanism. will not be necessary.

Further, in the laminated core manufacturing system according to the present invention, the stacking device includes a pressing portion that presses the plate-like pieces stacked on the stacking table from above, and a pressing portion that presses the plate-like pieces on the stacking table. and a pressing release position that is a position apart from above the plate-shaped piece on the stacking table, and a plurality of stacking pressing mechanisms having a pressing portion moving mechanism that moves between the pressing position and the pressing release position. The stacking holding mechanisms are divided into first and second groups, and before a new plate-like piece is stacked on the stacking table, the stacking holding mechanism of the first group sets the holding portion to the holding position. As a result, the plate-shaped pieces stacked at that time are held down from above, and the stacking holding mechanism of the second group sets the holding portion to the hold-release position, and after the new plate-shaped pieces are stacked, The stacking pressing mechanisms of the second group hold down a plurality of plate-like pieces including a new plate-like piece from above by setting the pressing portion to the pressing position, and the stacking pressing mechanism of the first group presses the pressing portion. A plurality of plate-like pieces including a new plate-like piece may be pressed from above by returning to the pressing position after moving to the release position.
With such a configuration, in the stacking device, when stacking a new plate-like piece, it is possible to prevent the previously stacked plate-like pieces from shifting.

Moreover, in the laminated core manufacturing system according to the present invention, the stacking device may further include a guide section for positioning the plate-like pieces in the width direction on the stacking table.
With such a configuration, in the stacking device, it is possible to eliminate lateral displacement of the plate-like pieces to be stacked.

Further, in the laminated core manufacturing system according to the present invention, the fork portion includes a fork base that holds the plurality of teeth so that they can move back and forth in the longitudinal direction of the teeth, and a retraction mechanism that moves the plurality of teeth back and forth with respect to the fork base. Further, the fork portion moving mechanism has a plurality of teeth respectively inserted into a plurality of recesses of the stacking table and moves the fork portion upward to lift the plate-like piece block on the stacking table, and the advancing/retreating mechanism Alternatively, when the plate-like piece blocks to be conveyed reach the stacking position, the plurality of teeth may be retracted toward the fork base to stack the plate-like piece blocks.
With such a configuration, the plate-like piece blocks can be picked up from the stacking table by the forks, and the plate-like piece blocks can be lowered and stacked at the stacking position.

Further, in the laminated core manufacturing system according to the present invention, the plurality of teeth are divided into first and second groups, and the advancing/retreating mechanism includes the first advancing/retreating mechanism for advancing/retreating the teeth of the first group and the teeth of the second group. The fork section further has a stacking holding mechanism for holding down the plate-like piece block to be stacked at the position of the teeth of the first group, and the fork section conveys the block. When the plate-like piece blocks are stacked, the first advance/retreat mechanism retracts the teeth of the first group toward the fork base, and the stack holding mechanism moves the plate block at a position where the teeth of the first group no longer exist. The second advancing/retreating mechanism may retract the second group of teeth toward the fork base side, and the stack pressing mechanism may release the pressing of the plate-like piece block.
With such a configuration, when the teeth of the fork portion are retracted in order to stack a new plate block, the stacking holding mechanism removes the plate blocks to be stacked from the previously stacked plate blocks. Since it is pressed in the direction of , it is possible to prevent the positional deviation of both. As a result, more accurate stacking becomes possible.

Further, in the laminated core manufacturing system according to the present invention, the fork further includes a plate-like piece block stopper that prevents the plate-like piece block to be laminated from moving in the retreating direction when the plurality of teeth is retreated. may
With such a configuration, when the teeth of the fork portion are retracted in order to stack a new plate-like block, the plate-like block to be stacked is prevented from retracting together with the retracted teeth. can be done.

Further, the stacking device according to the present invention is a stacking device for forming a plate-like piece block by stacking plate-like pieces used for a laminated core while shifting them in the longitudinal direction, wherein the plate-like pieces are stacked. a table, a conveying unit that conveys the plate-like piece while holding the upper surface side of the plate-like piece and releases the holding of the plate-like piece above the stacking table, and a longitudinal direction of the plate-like piece on the stacking table a plate-like piece stopper for positioning the front end of the plate-like piece, a plate-like piece stopper moving mechanism for moving the plate-like piece stopper to a position corresponding to the plate-like piece to be conveyed, and a plate-like piece stopper moving mechanism for moving the plate-like piece stopper to a position corresponding to the plate-like piece to be conveyed. By moving the holding part holding the front end of the plate-shaped piece and the holding part holding the front end of the plate-shaped piece in the longitudinal direction of the plate-shaped piece beyond the plate-shaped piece stopper, and a holding portion moving mechanism for disposing the plate-like piece at the position positioned by the plate-like piece stopper.
With such a configuration, it is possible to automatically produce a plate-like piece block in which the plate-like pieces used for the laminated core are stacked while being shifted in the longitudinal direction. The block of platelets may be used, for example, to manufacture a step lap bonded laminated core.

Further, a transporting and stacking device according to the present invention is a transporting and stacking device for transporting and stacking plate-shaped piece blocks on a table on which plate-shaped pieces used for a laminated core are stacked, and wherein A plurality of recesses extending in the lateral direction of the plate-shaped piece are arranged in parallel along the longitudinal direction of the plate-shaped piece, and have a plurality of teeth arranged in parallel that can be inserted into the plurality of recesses of the base. It comprises a fork part, and a fork part moving mechanism for moving the fork part so that the fork part lifts and conveys the plate-like piece blocks on the platform and stacks them at the stacking position.
With such a configuration, the laminated core can be manufactured in a smaller scale than the conventional automatic core stacking apparatus. For example, even when manufacturing an E-shaped core laminate, there is no need to install a belt conveyor up to the lamination positions of the yokes, side legs, and center legs. In addition, changes in the shape and size of the iron core to be stacked can be handled by changing the destination of the fork movement by the fork movement mechanism. will not be necessary.

According to the method for manufacturing a laminated core according to the present invention, it is possible to manufacture a laminated core by constructing plate-like piece blocks, conveying and laminating the plate-like piece blocks, and for example, laminating in a smaller scale configuration. It becomes possible to manufacture iron cores.

1 is a top view showing the overall configuration of a laminated core manufacturing system according to an embodiment of the present invention; FIG. The figure which shows the structure of the transfer apparatus in the same embodiment. A front view showing the configuration of the stacking device in the same embodiment. A top view showing the configuration of the stacking device in the same embodiment. A diagram for explaining the operation of stacking in the same embodiment. A diagram for explaining the operation of stacking in the same embodiment. A diagram for explaining the operation of stacking in the same embodiment. The front view which shows the structure of the fork part moving mechanism in the same embodiment. The side view which shows the structure of the fork part moving mechanism in the same embodiment. FIG. 2 is a top external view showing the configuration of the fork portion in the same embodiment; FIG. 2 is a perspective top view showing the configuration of the fork portion according to the same embodiment; The front view which shows the structure of the fork part in the same embodiment. The figure which shows the contact part of the 1st and 2nd tooth|gear part in the same embodiment. A diagram for explaining the operation of the fork portion in the same embodiment. A diagram for explaining the operation of the fork portion in the same embodiment. A diagram for explaining the operation of the fork portion in the same embodiment. A diagram for explaining the operation of the fork portion in the same embodiment. A diagram for explaining the operation of the fork portion in the same embodiment. A diagram for explaining the operation of the fork portion in the same embodiment. FIG. 4 is a diagram for explaining the operation of the lamination pressing mechanism in the same embodiment; FIG. 4 is a diagram for explaining the operation of the lamination pressing mechanism in the same embodiment; FIG. 4 is a diagram for explaining a plate-like piece block stopper and a stopper moving mechanism in the same embodiment; FIG. 4 is a diagram for explaining a plate-like piece block stopper and a stopper moving mechanism in the same embodiment; A diagram showing an example of step lap joining of the laminated core in the same embodiment. The figure which shows the edge part of the plate-shaped piece block laminated|stacked in the same embodiment.

Hereinafter, a laminated core manufacturing system and a laminated core manufacturing method according to the present invention will be described using embodiments. It should be noted that in the following embodiments, components denoted by the same reference numerals are the same or correspond to each other, and repetitive description may be omitted. A laminated core manufacturing system according to the present embodiment includes a stacking device that stacks plate-shaped pieces used for a laminated core while shifting them in the longitudinal direction to form a plate-shaped piece block, and a plate-shaped piece that is configured by the stacking device. a conveying and laminating device for manufacturing a laminated core by conveying and laminating blocks.

FIG. 1 is a top view showing the overall configuration of a laminated core manufacturing system 1 according to this embodiment. FIG. 2 is a diagram showing the configuration of the transfer device 3. As shown in FIG. 3 is a front view showing the structure of the stacking device 5, and FIG. 4 is a top view showing the structure of the stacking device 5. As shown in FIG. 6 and 7 are diagrams showing the configuration of the fork portion moving mechanism 61 of the conveying and stacking device 6. FIG. 8 is a top external view showing the structure of the fork portion 62 of the transporting and stacking device 6, FIG. 9 is a top perspective view showing the structure of the fork portion 62 of the transporting and stacking device 6, and FIG. 62 is a front view showing the configuration of 62. FIG.

In FIG. 1 , a laminated core manufacturing system 1 according to the present embodiment includes a transfer device 3 , a transport conveyor 4 , a stacking device 5 , and a transport stacking device 6 . A plurality of plate-like pieces 10 respectively placed on a plurality of pallets 2 are transferred to a conveyor 4 by a transfer device 3 and conveyed to a stacking device 5 by the conveyor 4 . The plate-like pieces 10 conveyed to the stacking device 5 are piled up while being shifted in the longitudinal direction to form a plate-like piece block 10a.

Here, an example of the laminated core will be described. FIG. 15 is a diagram showing an example of a joining structure of a plurality of plate piece blocks used in a laminated core. In FIG. 15, plate-like piece block 101 of the first yoke, plate-like piece block 102 of the second yoke, plate-like piece block 103 of the first side leg, plate-like piece block 104 of the second side leg, A case is shown in which the plate-like piece block 105 of the central leg is joined by step lap joints (step lap joints) in which joints are sequentially shifted in the same direction. In the step lap joint shown in FIG. 15, the joint portion between the central leg and the yoke is shifted in the longitudinal direction of the central leg (that is, in the direction of the double-headed arrow in FIG. 15). there is In the step-lap welding, the plate-like pieces are joined so as to be sequentially shifted in the same direction for each step. The number of plate-like pieces included in one step (that is, one stage) (hereinafter referred to as "the number of steps") is predetermined. The number of steps may be, for example, one, two, or three or more. Generally, the smaller the number of plate-like pieces included in one step, the better the characteristics of the laminated core. On the other hand, the greater the number of steps, the higher the efficiency in stacking plate-like pieces. For example, the number of steps may be two so that both merits can be enjoyed. In step lap bonding, a single plate-like piece block is usually formed by laminating a predetermined number of steps in order, and a plurality of the plate-like piece blocks are laminated to form a yoke or a side. A leg, a center leg, etc. are comprised. The number of steps included in the plate-like piece block used in step lap bonding is usually 3 or more, and may be, for example, 5 or 6 or more. FIG. 16 is a cross-sectional view showing an end portion of a state in which plate-like piece blocks are stacked. In FIG. 16, one step includes two plate-like pieces, and one plate-like piece block includes five steps. Therefore, ten plate-like pieces are laminated in one plate-like piece block. In the case where the laminated core is constructed using the plate-like piece blocks shown in FIG. will be In FIG. 16, plate-like piece blocks to be joined to the illustrated plate-like piece blocks are omitted. Further, the direction of deviation of the steps in the plate-like piece blocks may be switched during lamination of the plurality of plate-like piece blocks. In addition, usually, the yoke, side legs, and central leg, which are formed by stacking a plurality of plate-shaped piece blocks, are often configured so that the cross section perpendicular to the longitudinal direction is substantially circular. It doesn't have to be. Also, the joint structure of the yoke, legs, etc. in the laminated core may be a butt-lap joint instead of a step-lap joint. Since butt-lap welding can be considered as step-lap welding in which the number of steps is two, a detailed description thereof will be omitted. In the case where the joint structure of the laminated core is butt-lap joint, in the stacking device 5, two steps (two stages) of plate-like piece blocks are formed.

The plate-like piece block formed by the stacking device 5 is picked up from the stacking table 51 of the stacking device 5 by moving the fork portion 62 of the fork portion moving mechanism 61 of the transporting and stacking device 6, and reaches the stacking position. Moved and stacked. The fork portion 62 has a plurality of comb-shaped teeth for lifting the plate-like piece block, and the plurality of teeth are slid in the backward direction when the plate-like piece block is stacked on the target position. By doing so, the plate-like piece blocks are laminated. In the present embodiment, a case will be described in which an E-shaped core laminate (E-shaped laminated core) 9 is manufactured by laminating plate piece blocks in this manner.

The configuration of each device included in the laminated core manufacturing system 1 will be described below. First, referring to FIG. 2, the transfer device 3 for transferring the plate-like piece 10 from the pallet 2 to the transfer conveyor 4 will be described. Plate-like pieces 10, which are cut electromagnetic steel sheets, are stacked on each of the plurality of pallets 2 for each shape. That is, plate-like pieces 10 of the first yoke, first and second side legs, and center leg are placed on each of the plurality of pallets 2 . On each pallet 2, the plate-like pieces 10 are stacked in order of use in the laminated core manufacturing system 1 from the top. Also, the pallet 2 is placed on a lifter 7 . Then, the height of the pallet 2 is adjusted by the lifter 7 so that the target plate-like pieces 10 to be transferred to the conveyor 4 by the transfer device 3 are always at the same height. The transfer device 3 includes a belt conveyor 31, a suction mechanism having a suction pad 32, magnets 33 and 34 provided inside the belt conveyor 31, and an elevating mechanism (not shown) for the magnet 34. . Note that the suction mechanism can move the suction pad 32 in the up-down direction (vertical direction). When sucking up the uppermost plate-like piece 10 stacked on the pallet 2, the sucking mechanism lowers the suction pad 32 to the position of the plate-like piece 10, and moves the plate-like piece 10 to the suction pad 32. Moves upward by being adsorbed by Then, the sucked-up plate-like piece 10 is attracted to the lower surface of the belt conveyor 31 by the magnet 33 as indicated by the dashed line in FIG. The plate-like piece 10 is moved above the conveyer 4 by driving the belt conveyor 31 with the plate-like piece 10 attached to the lower surface thereof. After that, the magnet 34 is lifted by the elevating mechanism so that the attraction force of the magnet 34 does not reach the plate-like piece 10 to be conveyed, and the plate-like piece 10 falls on the upper surface of the conveyer 4 . In this manner, the transfer of the plate-like piece 10 from the pallet 2 to the transfer conveyor 4 is performed. Note that the transfer device 3 is movable in the transport direction of the transport conveyor 4 . Therefore, the transfer device 3 can move the plate-like piece 10 from any pallet 2 to the transport conveyor 4 .

The plate-like piece 10 moved to the upper surface of the conveyer 4 is attracted to the upper surface of the conveyer 4 by the magnet 4a. By driving the conveyer 4 , the plate-like piece 10 attracted to its upper surface is conveyed to the stacking device 5 .

As shown in FIGS. 3 and 4, the stacking device 5 includes a stacking table 51, a conveying unit 52, a plate-like piece stopper 53, a plate-like piece stopper moving mechanism 54, a holding unit 55, and a holding unit. It includes a section moving mechanism 56 , a plurality of stacking holding mechanisms 57 , and a guide section 58 .

The conveyed plate-like pieces 10 are stacked on the stacking table 51 to form the plate-like piece block 10a. The plate-like piece block 10a is normally constructed using plate-like pieces 10 having the same width. The stacking table 51 has a plurality of recesses 51a extending in the lateral direction of the plate-like piece 10 arranged on the stacking table 51 . The plurality of concave portions 51 a are arranged in parallel along the longitudinal direction of the plate-like pieces 10 stacked on the stacking table 51 . The concave portion 51 a serves as a place into which a plurality of teeth of the fork portion 62 are inserted when the fork portion 62 picks up the plate-like piece block 10 a on the stacking table 51 . A convex portion 51b exists between adjacent concave portions 51a. The upper surfaces of the plurality of protrusions 51b form a plane extending in the horizontal direction, and the plate-like piece block 10a is formed by stacking the plate-like pieces 10 on the upper surface.

The conveying unit 52 conveys the plate-like piece 10 while holding the upper surface side of the plate-like piece 10, and releases the holding of the plate-like piece 10 above the stacking table 51. A belt conveyor 52a is provided. , a magnet 52b provided inside the belt conveyor 52a, and an elevating mechanism 52c for elevating the magnet 52b. The lower surface of the belt conveyor 52a is substantially at the same height as the upper surface of the conveyer 4, and the plate-like piece 10 conveyed on the upper surface of the conveyer 4 is attracted to the lower surface of the belt conveyor 52a by the magnets 52b. transferred by. Then, by driving the belt conveyor 52a, the plate-like piece 10 held on the upper surface side is moved to above the stacking table 51. As shown in FIG. At this time, the magnet 52b is positioned just inside the belt on the lower side of the belt conveyor 52a (the position shown in FIG. 3). When a sensor (not shown) of the conveying unit 52 detects that the entire plate-like piece 10 has moved above the stacking table 51, the lifting mechanism 52c moves the magnet 52b inside the conveyor 52a to the position of the magnet 52b. The plate-shaped piece 10 is raised to a position where the adsorption force does not reach the plate-shaped piece 10 . As a result, the holding of the plate-like piece 10 conveyed by the belt conveyor 52 a is released, and the plate-like piece 10 drops onto the stacking table 51 . The lifting mechanism 52 may be composed of, for example, an air cylinder, a solenoid, or the like. In addition, it is preferable that the distance of the drop is short. This is for suppressing horizontal displacement caused by the drop. Also, the plate-like piece 10 is preferably dropped onto the stacking table 51 at a position where the front end in the longitudinal direction thereof does not exceed the position of the plate-like piece stopper 53 . This is because the front end side of the plate-like piece 10 is positioned by the plate-like piece stopper 53 . The front end of the plate-like piece 10 in the longitudinal direction is the end on the front side in the moving direction (arrow direction in FIG. 4) of the plate-like piece 10 by the holding portion 55 which will be described later. In this embodiment, the case where the longitudinal direction of the plate-like pieces 10 stacked in the stacking device 5 is the same as the conveying direction of the plate-like pieces 10 will be mainly described.

The plate-like piece stopper 53 is a member that positions the longitudinal front end of the plate-like piece 10 on the stacking table 51 . The plate-like piece stopper 53 positions the front end of the plate-like piece 10 by coming into contact with the front end of the plate-like piece 10 and preventing the movement of the plate-like piece 10 in the longitudinal direction. Further, when the plate-like piece stopper 53 moves on the stacking table 51 , the lower surface of the plate-like piece stopper 53 is formed by stacking a plurality of plate-like pieces 10 on the stacking table 51 . It is preferable that it exists at a position above the top surface of the plate-like piece block 10a. This is to prevent the plate-like piece stopper 53 from coming into contact with the plate-like piece 10 on the stacking table 51 when the plate-like piece stopper 53 is moved. Since the plate-like piece 10 is stacked by dropping the plate-like piece 10 with its front end in contact with the plate-like piece stopper 53, the smaller the degree of the drop, the less positional deviation occurs due to the drop. Therefore, when positioning the front end of the plate-like piece 10 , the lower surface of the plate-like piece stopper 53 should be positioned as low as possible within a range where it does not hit the plate-like piece 10 on the stacking table 51 . is preferred. Note that if the plate-like piece stopper 53 is also movable in the vertical direction, when positioning the front end of the plate-like piece 10, the lower surface of the plate-like piece stopper 53 is aligned with the uppermost surface of the plate-like piece block 10a. may be in contact with Moreover, the shape of the plate-like piece stopper 53 is not limited. The plate-shaped piece stopper 53 may have, for example, a rectangular shape, a triangular shape, a polygonal shape, a circular shape, or the like when viewed from above. Since positioning is performed by contacting the front end of the plate-like piece 10 with the side surface of the plate-like piece stopper 53, it is preferable that the side surface with which the front end of the plate-like piece 10 contacts has a shape extending in the vertical direction. . Therefore, the plate-like piece stopper 53 may have, for example, a rectangular parallelepiped shape, a triangular prism shape, a polygonal prism shape, a cylindrical shape, or the like. Also, the number of plate-like piece stoppers 53 may be one, or two or more may be present.

The plate-like piece stopper moving mechanism 54 moves the plate-like piece stopper 53 to a position corresponding to the plate-like piece 10 to be conveyed, and includes a base portion 54a, a support portion 54b, an arm 54c, and moving means (Fig. not shown). The base portion 54a is provided so as to be movable relative to the upper surface of the support portion 54b in the left-right direction in FIGS. The movement is performed by movement means such as a ball screw or a rack and pinion that can perform highly accurate positioning. An arm 54c extends from the base portion 54a toward the conveyor 4, and the tip end of the arm 54c is bent to extend toward the stacking table 51. As shown in FIG. That is, the arm 54c is substantially L-shaped. A plate piece stopper 53 is attached to the tip of the arm 54c. In addition, in the plate-like piece blocks 10a configured by stacking, the amount of displacement in each step in the longitudinal direction is determined in advance. Therefore, the plate-like piece stopper moving mechanism 54 moves the plate-like piece stopper 53 so that the plate-like piece 10 whose front end in the longitudinal direction is positioned by the plate-like piece stopper 53 is stacked at a predetermined position. shall be repositioned. For example, when stacking is performed in a plurality of steps, the position of the plate-like piece stopper 53 is moved by the plate-like piece stopper moving mechanism 54 for each step. Therefore, when the plate-like piece stopper 53 exists at a position corresponding to the plate-like piece 10 to be conveyed, the plate-like piece to be conveyed placed on the stacking table 51 in contact with the plate-like piece stopper 53 10 are arranged at positions forming predetermined steps on the stacking table 51 . The plate-like piece stopper moving mechanism 54 does not move the position of the plate-like piece stopper 53 while the plate-like piece 10 is being positioned by the plate-like piece stopper 53 . Further, when the number of steps is plural, the plate-like piece stopper moving mechanism 54 changes the position of the plate-like piece stopper 53 each time a plurality of plate-like pieces 10 are stacked on the stacking table 51 . You may For example, when the number of steps is two, the plate-like piece stopper moving mechanism 54 holds the plate-like piece stopper 53 at the same position while two consecutive plate-like pieces 10 are positioned. good too. The plate-like piece stopper moving mechanism 54 may have means for moving the plate-like piece stopper 53 in the vertical direction.

The holding portion 55 holds the front end of the plate-like piece 10 released from the holding by the conveying portion 52 on the stacking table 51 . The holding part 55 is a plate-like member provided so that the surface direction is horizontal, and a magnet 55a is provided at least on the conveyer 4 side. The magnet 55 a can hold the front end of the plate-like piece 10 that has fallen from the conveying section 52 . In addition, in order to hold the front end of the dropped plate-like piece 10 by the holding portion 55, the holding of the plate-like piece 10 by the conveying portion 52 is released at a position where the front end of the plate-like piece 10 is at least above the magnet 55a. It is preferred that In addition, since the plate-like piece 10 is stacked by sliding down from the holding portion 55 with the front end abutting against the plate-like piece stopper 53, the smaller the degree of drop from the holding portion 55, the more the position corresponding to the drop. No deviation will occur. Therefore, it is preferable that the lower surface of the holding portion 55 is positioned as low as possible within the range where it does not come into contact with the plate-like piece 10 on the stacking table 51 .

The holding portion moving mechanism 56 moves the holding portion 55 holding the front end of the plate-like piece 10 over the plate-like piece stopper 53 in the longitudinal direction of the plate-like piece 10 , thereby moving the holding portion 55 onto the stacking table 51 . , the plate-like piece 10 is arranged at a position positioned by the plate-like piece stopper 53, and includes an air cylinder 56a, a mounting plate 56b, and an arm 56c. The main body of the air cylinder 56a is attached to a mounting plate 56b fixed to the base portion 54a of the plate-like piece stopper moving mechanism 54, and the piston rod of the air cylinder 56a is attached to the plate-like piece 10 stacked on the stacking table 51. is movable in the longitudinal direction. An arm 56c is attached to the tip of the piston rod. The arm 56c extends toward the conveyer 4 side, and the tip side thereof is bent to extend toward the stacking table 51. - 特許庁That is, the arm 56c is substantially L-shaped. A holding portion 55 is attached to the tip of the arm 56c. When the front end of the plate-like piece 10 held by the holding portion 55 contacts the plate-like piece stopper 53, the plate-like piece 10 is positioned in the longitudinal direction. Therefore, when the holding portion 55 is moved over the plate-like piece stopper 53 , the height of the holding portion 55 is such that the front end of the held plate-like piece 10 comes into contact with the plate-like piece stopper 53 . shall be Further, the holding portion moving mechanism 56 moves the holding portion 55 from a position not exceeding the plate-like piece stopper 53 to a position exceeding the plate-like piece stopper 53 in the movement direction of the plate-like piece 10 on the stacking table 51 . shall be moved. The movement direction of the plate-like piece 10 on the stacking table 51 is the direction in which the plate-like piece 10 is moved on the stacking table 51 by the holding portion 55 and the holding portion moving mechanism 56 (arrow direction in FIG. 4). It's about. The plate-like piece 10 held by the holding portion 55 is limited in movement in the moving direction by hitting the plate-like piece stopper 53, but the holding portion 55 continues to move in the moving direction. The plate-like piece 10 is not held by the holding portion 55 , and its front end is placed on the stacking table 51 positioned by the plate-like piece stopper 53 . Therefore, it is preferable that the holding portion moving mechanism 56 finally moves the holding portion 55 to a position where the holding portion 55 no longer exists under the plate-like piece 10 to be held. Note that the holding portion moving mechanism 56 may have means for moving the holding portion 55 in the vertical direction.

The stacking pressing mechanism 57 has a pressing portion 57a that presses down the plate-like pieces 10 stacked on the stacking table 51 from above, and a position where the pressing portion 57a presses the plate-like pieces 10 on the stacking table 51. A pressing portion moving mechanism 57 b is provided for moving between a pressing position and a pressing release position which is a position away from the upper side of the plate-like piece 10 on the stacking table 51 . It should be noted that the pressing portion 57 a at the pressing release position does not exist above the plate-like piece 10 on the stacking table 51 . The pressing portion 57a is a member that contacts the uppermost plate-like piece 10 when the stacking pressing mechanism 57 presses the stacked plate-like pieces 10 from above. The pressing portion moving mechanism 57b may have any configuration as long as it can move the pressing portion 57a to the pressing position or to the pressing release position. In this embodiment, a case where the stacking holding mechanism 57 is a rotary clamp cylinder will be mainly described. The rotary clamp cylinder is an air cylinder whose rod angle is rotated by 90° when the piston rod is moved, and a member corresponding to the pressing portion 57a is attached to the tip of the piston rod. A specific operation of the stacking holding mechanism 57 will be described later.

The guide portion 58 positions the plate-like piece 10 on the stacking table 51 in the lateral direction, and includes a guide member 58a, a rail 58f, a mounting plate 58g, and an air cylinder 58h. The guide member 58a positions the plate-like piece 10 in the width direction by coming into contact with the longitudinal side of the plate-like piece 10, and is stepped by an air cylinder 58h attached to the mounting plate 58g. It is movable in the lateral direction of the plate-like piece 10 on the stacking platform 51 . The mounting plate 58g is movable on the rail 58f in the lateral direction of the plate-like piece 10 on the stacking table 51, and is moved by a moving means (not shown). It is preferable that the moving means is, for example, a ball screw, a rack and pinion, or the like, which can perform highly accurate positioning. It is preferable that the guide member 58a is moved in the direction of sandwiching the plate-like piece 10 or in the direction away from the plate-like piece 10, as indicated by the dashed line in FIG. By operating the air cylinders 58h attached to the mounting plates 58g, the plurality of guide members 58a move in the direction of sandwiching the plate-like piece 10 on the stacking table 51 or away from the plate-like piece 10, respectively. It is preferably adapted to be moved in a direction. That is, the air cylinder 58h is used as a guide width expanding mechanism for expanding the guide width of the guide member 58a. The air cylinder 58h expands the width of the guide member 58a by extending the piston rod until the plate-like piece 10 is dropped from the conveying portion 52 onto the stacking table 51, and the holding portion 55 holds the plate-like piece. 10 (arrow direction in FIG. 4), the piston rod is housed in the cylinder tube so that the guide member 58a positions the plate-like piece 10 in the width direction (transverse direction). can be A mechanism other than the air cylinder 58h, such as a solenoid, may be used as the guide width expanding mechanism. 3 and 4, four mounting plates 58g move two by two on two rails 58f. Further, in this embodiment, a case where the stacking holding mechanism 57 is also attached to the mounting plate 58g will be described. Therefore, the stacking holding mechanism 57 is also moved in the lateral direction of the plate-like piece 10 on the stacking table 51 together with the guide member 58a. A specific operation of the guide portion 58 will be described later. Note that the stacking holding mechanism 57 and the guide member 58a may be moved separately. In that case, the guide portion 58 may not have the air cylinder 58h. This is because the position of the stacking holding mechanism 57 does not change even if the guide member 58a is moved to a wider position by the moving means of the mounting plate 58g.

The conveying and stacking device 6 manufactures a laminated core by conveying and stacking the plate-like piece blocks 10 a configured by the stacking device 5 , and includes a fork portion moving mechanism 61 and a fork portion 62 . The fork portion 62 has a plurality of teeth 81 a and 82 a that can be inserted into the plurality of recesses 51 a of the stacking base 51 . The fork portion moving mechanism 61 moves the fork portion 62 so that the plate-like piece block 10a on the stacking table 51 is lifted and transported, and stacked at the stacking position. As indicated by 7, it comprises a frame 61a, a horizontal support member 61b, a vertical support member 61c, and a pivot shaft 61d.

The frame body 61 a is provided in the movement area of the fork portion 62 . The frame 61a supports the horizontal support member 61b so as to be movable in the direction of the double arrow X in FIG. 6 (hereinafter sometimes referred to as the "X direction"). The horizontal support member 61b is a member extending in the direction of a double arrow Y in FIG. 7 (hereinafter sometimes referred to as "Y direction"). The horizontal support member 61b supports the vertical support member 61c so as to be movable in the Y direction and the direction of the double arrow Z in FIG. 6 (hereinafter sometimes referred to as the "Z direction"). . The vertical support member 61c is a member extending in the Z direction. By driving the ball screw 61e, the vertical support member 61c is moved in the Z direction. The vertical support member 61c also supports the fork portion 62 via a pivot shaft 61d extending in the Z direction. 6 and 7, motors for driving the horizontal support member 61b, the vertical support member 61c, and the turning shaft 61d are omitted. The fork portion moving mechanism 61 moves the fork portion 62 in the X-direction, the Y-direction, and the Z-direction, and rotates about the rotation shaft 61d. Therefore, movement of the fork portion 62 by the fork portion moving mechanism 61 includes movement and rotation in the three-dimensional space. For example, in FIG. 6, the fork portion moving mechanism 61 in which the horizontal support member 61b is moved in the X direction and the vertical support member 61c is moved in the Z direction is indicated by broken lines.

As shown in FIGS. 8 to 10, the fork portion 62 includes a tooth portion 71, a fork base portion 72, a first advance/retreat mechanism 73, a second advance/retreat mechanism 74, a lamination pressing mechanism 76, and a plate piece block. A stopper 77 and a stopper moving mechanism 78 are provided.

The tooth portion 71 has a plurality of teeth 81a, 82a arranged in parallel. In this embodiment, a case where the tooth portion 71 has a first tooth portion 81 and two second tooth portions 82 existing on both sides of the first tooth portion 81 will be described. The first and second tooth portions 81 and 82 are configured to be individually advanced and retracted with respect to the fork base portion 72 . The first tooth portion 81 has two teeth 81a and a base portion 81b to which the base end sides of the two teeth 81a are respectively fixed. Each of the two second tooth portions 82 has six teeth 82a and a base portion 82b to which the base end sides of the six teeth 82a are respectively fixed. The teeth 81a of the first tooth portion 81 are sometimes called first group teeth, and the teeth 82a of the second tooth portion 82 are sometimes called second group teeth. The teeth 81a, 82a of the first and second groups can be advanced and retreated independently by the first and second advance and retreat mechanisms 73, 74, respectively. Further, the number of teeth 81a included in the first tooth portion 81 may be other than two. For example, one may be used, or three or more may be used. Further, the number of teeth 82a included in the second tooth portion 82 may be other than six. The number may be any number from 1 to 5, or may be 7 or more.

The fork base 72 holds a plurality of teeth 81a, 82a so as to be movable back and forth in the longitudinal direction of the teeth 81a, 82a, and has rails 72a to 72d. These rails 72a to 72d are fixed to the structure of the fork base 72, respectively. It should be noted that many parts of the structure are omitted from the drawing. Further, the first tooth portion 81 has sliders 81c and 81d, which are slidably assembled to the rails 72c and 72d, respectively. The sliders 81c, 81d and the rails 72c, 72d hold the first tooth portion 81 so that it can advance and retreat in the longitudinal direction of the tooth 81a. The second tooth portion 82 has sliders 82c and 82d, which are slidably assembled to the rails 72a and 72b, respectively. The sliders 82c, 82d and the rails 72a, 72b hold the second tooth portion 82 so that it can advance and retreat in the longitudinal direction of the tooth 82a.

The first advancing/retreating mechanism 73 advances/retreats the first tooth portion 81 with respect to the fork base portion 72 . That is, the first advancing/retreating mechanism 73 advances/retreats a plurality of teeth 81a which are the first group of teeth. In this embodiment, the case where the first advance/retreat mechanism 73 is an air cylinder will be mainly described.

The second advance/retreat mechanism 74 advances/retreats the second tooth portion 82 with respect to the fork base portion 72 . That is, the second advancing/retreating mechanism 74 advances/retreats the plurality of teeth 82a that are the teeth of the second group. In this embodiment, the case where the second advance/retreat mechanism 74 is a ball screw will be mainly described. The nut 74a of the ball screw is fixed to the base portion 82b of the second tooth portion 82, and the screw shaft of the ball screw is rotated by rotating the pulley 74b by a motor (not shown). It advances and retreats with respect to the base portion 72 . It is preferable that the two second tooth portions 82 are advanced and retreated at the same speed (pace) by the two second advancing and retreating mechanisms 74, respectively.

In addition, as shown in FIG. 11, the base portion 81b of the first tooth portion 81 is provided with a projecting portion 81e projecting toward the second tooth portion 82 side. The base portion 82b of the second tooth portion 82 is provided with an L-shaped notch portion 82f on the first tooth portion 81 side. It is designed to abut on. It is assumed that the first tooth portion 81 and the second tooth portion 82 on the opposite side of the portion shown in FIG. 11 are also similar. Therefore, when the first and second teeth 81 and 82 are advanced from the fork base 72 side, the air cylinder of the first advance/retreat mechanism 73 pushes the first teeth 81 forward, thereby causing L The notch portion 82f and the protruding portion 81e abut against each other, and as a result, the position of the base portion 81b of the first tooth portion 81 is shifted to the base portion of the second tooth portion 82 accurately positioned by the second advancing/retreating mechanism 74. They are aligned at the position of 82b, and both are aligned on a straight line.

The lamination pressing mechanism 76 presses down the plate block 10a to be laminated during lamination, and includes an air cylinder 76a, a rail 76b, a mounting plate 76c, an air cylinder 76d, and a contact portion 76e. Prepare. In this embodiment, a case where the lamination pressing mechanism 76 presses the plate block 10a downward at the position of the teeth of the first group will be mainly described. The position of the first group of teeth strictly means the position that the first group of teeth existed before it was retracted. When stacking the plate-shaped block 10a to be transported on the uppermost part of the stack at the stacking position, the stacking pressing mechanism 76 holds the stacking object in a state in which the first tooth portion 81 is retracted toward the fork base portion 72 side. 2, the portion of the plate-like block 10a where the first tooth portion 81 was present is pressed in the direction of the laminated body (that is, downward) formed so far. By doing so, when the second tooth portion 82 is retracted, the position of the plate-like piece block 10a to be laminated is prevented from being shifted with respect to the existing laminated body. It is preferable that the position at which the lamination pressing mechanism 76 presses down the plate-like block 10a to be laminated is a position away from the position of the teeth of the second group that have not yet been retracted. In the present embodiment, since the teeth of the first group exist between the teeth of the second group, the stacking holding mechanism 76 is positioned between the two teeth 81a (strictly speaking, the teeth of the first group). , between the two teeth 81a that existed before being retracted), the case where the plate block 10a is pressed downward will be mainly described. The main body of the air cylinder 76a is fixed to the fork base 72, and the tip of the piston rod of the air cylinder 76a is fixed to the mounting plate 76c. The piston rod of the air cylinder 76a is movable in the longitudinal direction of the teeth 81a, and a rail 76b is provided parallel to the longitudinal direction of the piston rod. A mounting plate 76c is attached to the tip of the rail 76b. Further, the fork base portion 72 is attached with a slider that is slidably assembled to the rail 76b. By driving the air cylinder 76a, the mounting plate 76c advances and retreats in the longitudinal direction of the teeth 81a. An air cylinder 76d is attached to the mounting plate 76c, and a piston rod of the air cylinder 76d is vertically movable. At the tip of the piston rod of the air cylinder 76d, there is provided a contact portion 76e that contacts the uppermost plate piece 10 of the plate block 10a when preventing the plate block 10a from shifting. . Therefore, the air cylinder 76d and the contact portion 76e constitute a pressing portion that presses the plate-like piece blocks 10a to be stacked in the direction of the stack during stacking. , a moving mechanism is configured to move the pressing portion in the lateral direction of the plate block 10a to be conveyed. In addition, the moving mechanism moves the holding portion with respect to the fork base portion 72 . 13A and 13B are diagrams showing the operation of the lamination pressing mechanism 76 when preventing the plate block 10a from shifting. In order to prevent the plate block 10a from shifting during stacking, as shown in FIG. 13A, the mounting plate 76c is moved near the center of the plate block 10a in the width direction by the air cylinder 76a. At that time, the piston rod of the air cylinder 76d is accommodated in the cylinder tube. After that, when pressing the plate block 10a, the piston rod of the air cylinder 76d is extended as shown in FIG. The block 10a is pressed against the laminate that has been laminated so far, and the plate-like piece block 10a is prevented from slipping in the longitudinal direction or the like when the teeth 82a are retracted. At this time, it is preferable that the lower surface side of the plate block 10a in the vicinity of the contact portion 76e is in contact with the upper surface of the laminated body that has been laminated so far. 13A and 13B, illustration of the air cylinder 76a is omitted. Also, in the present embodiment, the case where the fork portion 62 has one stacking pressing mechanism 76 is mainly described, but the fork portion 62 may have two or more stacking pressing mechanisms 76 .

Further, the fork portion 62 may have a displacement prevention mechanism for preventing displacement of the plate block 10a during transportation. The displacement prevention mechanism may prevent displacement by, for example, pressing the plate block 10a toward a plurality of teeth 81a and 82a in the same manner as the lamination pressing mechanism 76, and the plate block 10a may be prevented from being displaced by a magnet. The displacement may be prevented by sucking the plate-like pieces 10, by sandwiching the plate-like piece block 10a in the thickness direction, or by other methods. good. Moreover, the number of the deviation prevention mechanisms does not matter.

The plate-like piece block stopper 77 is a stopper that prevents the plate-like piece block 10a to be stacked from moving in the retreating direction when the teeth 81a and 82a are retreated. When the teeth 81a, 82a are retracted, the plate block 10a resting on the teeth 81a, 82a is retracted together with the teeth 81a, 82a. Therefore, the plate-like piece block stopper 77 prevents the plate-like piece block 10a from retreating when the teeth 81a and 82a are retreated. The plate-like piece block stoppers 77 may be considered as stoppers for positioning the plate-like piece blocks 10a to be laminated in the lateral direction during lamination. The plate-like piece block stopper 77 is moved by a stopper moving mechanism 78 . Also, in this embodiment, the case where the number of the plate-like piece block stoppers 77 is two will be mainly described, but this need not be the case. The number of plate-like piece block stoppers 77 may be one or three or more as long as the plate-like piece block 10a can be prevented from moving when the plurality of teeth 81a and 82a are retracted. In order to prevent the plate block 10a from tilting when the teeth 81a and 82a are retracted, the number of the plate block stoppers 77 is preferably two or more.

The stopper moving mechanism 78 moves the plate-like piece block stopper 77 in the lateral direction of the plate-like piece block 10a to be stacked, and moves a ball screw 78a, a pair of guide members 78b, and a mounting plate 78c. Prepare. The ball screw 78a has a nut having substantially the same length as the screw shaft, and a mounting plate 78c is attached to the tip of the nut. Note that the screw shaft is rotatably fixed to the fork base 72 . A pulley 78e is attached to the screw shaft, and when the pulley 78e is rotated by a motor (not shown), the mounting plate 78c attached to the tip of the nut is moved in the longitudinal direction of the teeth 82a. Become. Since the mounting plate 78c is moved by the ball screw 78a, positioning of the mounting plate 78c can be achieved with higher accuracy than with an air cylinder. A pair of guide members 78b are provided symmetrically across the ball screw 78a. The guide member 78b has a cylindrical member fixed to the fork base 72 and a rod-shaped member having a circular cross section slidably inserted inside the cylindrical member. It is fixed to the plate 78c. As a result, the mounting plate 78c is moved in the longitudinal direction of the tooth 82a while maintaining the vertical direction of the surface direction. A plate piece block stopper 77 is attached to the mounting plate 78c. 14A and 14B are diagrams showing the operation of the stopper moving mechanism 78. FIG. As shown in FIG. 14A, the plate-like piece block stopper 77 is retracted until the plate-like piece block 10a to be conveyed is prevented from moving in the lateral direction when the plurality of teeth 81a and 82a are retracted. It will exist in the position where Next, in order to prevent the plate-like piece block 10a from moving, as shown in FIG. The mounting plate 78c is moved by the ball screw 78a. The position of the plate-like piece block stopper 77 may be determined in advance according to the shape and size of the plate-like piece 10 to be stacked. After that, even if the plurality of teeth 81a and the plurality of teeth 82a are retracted, the plate-like piece block 10a to be stacked is positioned by the plate-like piece block stopper 77 and does not retreat, thereby preventing deviation from the stacking position. . In this embodiment, a case where a stopper moving mechanism 78 is provided for each plate block stopper 77 will be mainly described. You may make it move by.

Next, the plate-like pieces 10 placed on the pallet 2 are conveyed and stacked to form a plate-like piece block 10a. The operation of each device when forming the shaped core laminate 9, that is, the method of manufacturing the laminated core will be described. The laminated core manufacturing method includes a step of forming a plate-like piece block 10a by stacking the plate-like pieces 10 used in the laminated core, and a step of conveying and laminating the plate-like piece block 10a formed by the step. and a step of manufacturing an iron core.

First, the process of forming the plate block 10a will be described. First, the transfer device 3 is moved to the position of the pallet 2 on which the plate-shaped piece 10 to be stacked is placed, and as shown in FIG. The shaped pieces 10 are transferred to the conveyer 4 one by one. The transferred plate-like piece 10 is conveyed to the stacking device 5 by the conveyer 4 and handed over to the conveying section 52 of the stacking device 5 . The conveying unit 52 attracts the plate-like piece 10 to the lower surface of the belt conveyor 52 a with the magnet 52 b and conveys the plate-like piece 10 above the stacking table 51 . FIG. 5A is a diagram showing the state of the stacking holding mechanism 57 and the guide member 58a in the stacking device 5 after one plate-like piece 10 is stacked. In FIG. 5A, the stacking holding mechanism 57 is divided into a first group stacking holding mechanism 57-1 and a second group stacking holding mechanism 57-2. As shown in FIG. 5A, after the plate-like pieces 10 are stacked on the stacking table 51, both the stacking holding mechanisms 57-1 and 57-2 of the first and second groups hold the plate-like pieces. 10 is in the pressing position. Further, the distance between the opposing surfaces of the guide member 58a on the side of the plate-like piece 10 is the same as the length of the plate-like piece 10 in the width direction, so that the plate-like piece 10 is positioned in the width direction. . Next, before a new plate-like piece 10 is stacked on the stacking table 51, the stacking holding mechanism 57-1 of the first group sets the holding portion 57a to the holding position so that at that time point The stacking holding mechanism 57-2 of the second group holds the holding portion 57a at the holding release position. Further, each guide member 58a is moved to a wider position by an air cylinder 58h. That is, each guide member 58a is positioned away from the plate-like piece 10. As shown in FIG. Thereafter, the holding portion moving mechanism 56 moves the holding portion 55 toward the rear end of the plate-like piece 10 by extending the piston rod of the air cylinder 56a. Next, the plate-like piece stopper moving mechanism 54 moves the plate-like piece stopper 53 and the holding portion 55 to a position corresponding to the plate-like piece 10 to be newly stacked.

After that, when the plate-like piece 10 to be conveyed reaches a predetermined position, the conveying unit 52 stops the belt conveyor 52a, raises the magnet 52b by the elevating mechanism 52c, and the attraction force of the magnet 52b is applied to the plate-like piece 10. The plate-like piece 10 is dropped onto the stacking table 51 by keeping it out of reach. The front end of the dropped plate-like piece 10 is held by the magnet 55 a of the holding portion 55 . Therefore, the dropped plate-like piece 10 is held by the holding portion 55 at the front end side and is floating from the plate-like piece 10 on the stacking table 51 , and the rear end side is attached to the plate-like piece 10 on the stacking table 51 . They are in contact with each other. At the position of the pressing portion 57a of the stacking pressing mechanism 57-1 of the first group, the dropped plate-like piece 10 is separated from the stacking table 51 by the thickness of the pressing portion 57a. will float.

Next, each guide member 58a is returned to its original position, i.e., the position in contact with the longitudinal side of the plate-like piece 10 on the stacking table 51 by the air cylinder 58h. As a result, the plate-like piece 10 is positioned in the lateral direction. FIG. 5B is a diagram showing the positional relationship among the plate-like piece 10, the plate-like piece stopper 53, and the holding portion 55 in that state. After that, the holding portion moving mechanism 56 moves the holding portion 55 holding the front end of the plate-like piece 10 in the direction of the front end of the plate-like piece 10 beyond the position of the plate-like piece stopper 53, that is, The air cylinder 56 a moves the holding portion 55 toward the front end of the plate-like piece 10 so that the new plate-like piece 10 is positioned on the stacking table 51 by the plate-like piece stopper 53 . to At that time, the guide member 58a prevents the plate-like piece 10 from shifting in the lateral direction. As a result, new plate-like pieces 10 are stacked on the stacking table 51 as shown in FIG. 5C. In this state, since the pressing portion 57a of the stacking pressing mechanism 57-2 of the second group is at the pressing release position, it does not exist between the existing plate-like piece 10 and the new plate-like piece 10. However, since the pressing portion 57a of the stacking pressing mechanism 57-1 of the first group is in the pressing position, it exists between the existing plate-like piece 10 and the new plate-like piece 10. FIG.

After the new plate-shaped piece 10 is stacked in this manner, the stacking holding mechanism 57-2 of the second group sets the holding portion 57a to the holding position, so that the new plate-shaped piece 10 (that is, A plurality of plate-like pieces 10 including the uppermost plate-like piece 10) are pressed from above. Also, the stacking holding mechanism 57-1 of the first group moves the holding portion 57a to the holding release position. After that, the stacking holding mechanism 57-1 of the first group presses the plurality of plate-like pieces 10 including the new plate-like piece 10 from above by returning the holding portion 57a to the holding position again. Since all the plate-like pieces 10 on the stacking table 51 are held down by the stacking holding mechanism 57-2 of the second group, the stacking holding mechanism 57-1 of the first group is operated in this way. The position of the plate-like piece 10 on the stacking table 51 is not displaced even if the plate-like piece 10 is moved. In this manner, the plate-like pieces 10 are stacked on the stacking table 51. As shown in FIG. This operation is repeated by the number of plate-like pieces 10 included in the plate-like piece block 10a. In the above description, one plate-like piece 10 has already been placed on the stacking table 51, and a new plate-like piece 10 is stacked thereon. When placing the first plate-shaped piece 10 on top, the same procedure may be performed.

Next, a description will be given of a process of manufacturing a laminated core by transporting and laminating the formed plate piece blocks. In this step, the fork portion 62 having a plurality of teeth 81a, 82a arranged in parallel so as to be inserted into the plurality of recesses of the stacking table 51 lifts the plate block 10a on the stacking table 51. and a step of stacking the plate-like piece blocks 10a to be transported on the stacking position by the fork portion 62 . First, the process of lifting and conveying the plate block 10a on the stacking table 51 will be described. When the plate-like pieces 10 are stacked on the stacking table 51 to form the plate-like piece block 10a, the fork portion moving mechanism 61 moves the fork portion 62 with all of the plurality of teeth 81a and 82a exposed. The plurality of teeth 81 a and 82 a are inserted into the plurality of concave portions 51 a of the stacking base 51 by moving. After that, the fork portion moving mechanism 61 lifts the plate block 10a on the stacking table 51 by moving the fork portion 62 upward, that is, by moving the vertical support member 61c upward. At this time, it is assumed that the guide member 58a is at the wide position, and the pressing portions 57a of the stacking pressing mechanism 57 are at the pressing release position.

As shown in FIG. 12A, the fork portion moving mechanism 61 moves the fork portion 62 with the plate block 10a placed on the plurality of teeth 81a and 82a to the position forming the E-shaped core laminate 9. move to

Next, the process of stacking the plate-like piece blocks 10a to be conveyed at the stacking position by the fork portion 62 will be described. When the fork portion 62 is moved to the stacking position, the fork portion moving mechanism 61 moves the fork portion 62 so that the plate-like piece block 10a to be transported is immediately above the stacking position of the plate-like piece block 10a. to move. In this case, it is preferable that the lower surfaces of the plurality of teeth 81a and 82a are close to the uppermost surface of the laminate, but not in contact with the uppermost surface of the laminate. Next, as shown in FIG. 12B, the two stopper moving mechanisms 78 each move the plate-like piece block stoppers 77 to the positions of the longitudinal sides of the plate-like piece block 10a. The position is usually predetermined according to the width of the plate block 10a. Specifically, by driving the ball screw 78a, the mounting plate 78c is moved to a predetermined position, and the plate-like piece block stopper 77 moves along the side of the plate-like piece block 10a on the fork base 72 side. position (FIG. 14B).

After that, when the plate-like piece blocks 10a conveyed by the fork portion 62 are stacked, as shown in FIG. Retreat to the 72 side. That is, the teeth of the first group are retracted toward the fork base 72 side. At this time, the movement of the plate block 10a in the backward direction is prevented by the plate block stopper 77. As shown in FIG. Next, as shown in FIG. 12D, the lamination pressing mechanism 76 moves the plate-like piece to be laminated at the position where the two teeth 81a of the first tooth portion 81, that is, the teeth of the first group no longer exist. The block 10a is pressed downward, that is, on the side of the already laminated core laminations. Specifically, by extending the piston rod of the air cylinder 76a of the lamination pressing mechanism 76, the air cylinder 76d is positioned substantially at the center in the width direction of the plate block 10a. is extended so that the contact portion 76e presses the plate block 10a downward. At this time, it is preferable that the lower surface of the plate piece block 10a is pressed against the upper surface of the core laminates that have been laminated so far with an appropriate force. The appropriate force is a force that can prevent the plate piece block 10a from being displaced with respect to the core laminate when the second tooth portion 82 is retracted. When the plate-like piece block 10a to be laminated is positioned at the bottom of the E-shaped core laminated body 9, the plate-like piece block 10a to be laminated is placed on the table on which the E-shaped core laminated body 9 is laminated. will be pressed down.

After the plate piece block 10a is pressed downward by the stack pressing mechanism 76, as shown in FIG. The two groups of teeth are retracted toward the fork base 72 side. Specifically, by driving the ball screw of the second retracting mechanism 74, the two second tooth portions 82 are retracted toward the fork base portion 72 at the same speed. At this time, the lamination holding mechanism 76 and the plate-like piece block stopper 77 prevent the plate-like piece blocks 10a to be laminated from shifting. Next, the lamination pressing mechanism 76 releases the pressing of the plate block 10a by housing the piston rod of the air cylinder 76d in the cylinder tube, and houses the mounting plate 76c on the fork base 72 side. Further, by driving the ball screws of the two stopper moving mechanisms 78, the two plate block block stoppers 77 are also housed on the fork base 72 side. In this way, the stacking of the plate-like piece blocks 10a at the stacking position is completed, as shown in FIG. 12F. After that, the fork portion moving mechanism 61 moves the fork portion 62 to the stacking device 5, and repeats the transportation and stacking of the stacked plate-like piece blocks 10a. In this way, the configuration of the plate-like piece blocks 10a in the stacking device 5 and the stacking of the plate-like piece blocks 10a by the conveying and stacking device 6 are repeated to finally manufacture the E-shaped laminated core. become. When forming the E-shaped core laminate 9, it is necessary to form a step lap joint or the like at each joint. Therefore, when stacking the respective plate-shaped piece blocks shown in FIG. Finally, by repeating the lamination of the second side legs 104, the E-shaped core laminate 9 is formed. Therefore, in the stacking device 5, for example, the plate-like piece blocks 10a may be configured in the order of the first side leg and the center leg. By stacking the plate-like piece blocks 10a in this way, it is not necessary to provide the plate-like piece 10 with holes for positioning. In the laminated core manufactured by laminating the plate-shaped pieces 10 without such holes, it is possible to prevent the deterioration of the characteristics of the transformer, etc., which may occur according to the reduction in the cross-sectional area. Generation of acetylene gas that may occur due to heat generation due to core short-circuiting can be avoided. In addition, since the time required for drilling during core processing is eliminated, the overall manufacturing time of the laminated core can be shortened.

As described above, according to the laminated core manufacturing system 1 according to the present embodiment, the plate-like piece block 10a is formed by the stacking device 5, and the plate-like piece block 10a is conveyed and laminated by the conveying and laminating device 6. Therefore, by manufacturing a laminated core, a smaller system can be achieved compared to the case where a belt conveyor is arranged up to the lamination position. Also, even when the shape and size of the laminated core are changed, the change can be easily accommodated by changing the transfer destination and the lamination position of the transfer and lamination device 6 . Furthermore, while the plate-like piece blocks 10a are being conveyed and stacked by the conveying/stacking device 6, the stacking device 5 can stack the next plate-like piece blocks 10a to be stacked in parallel. Therefore, the laminated core can be efficiently configured. A laminated core manufactured by the laminated core manufacturing system 1 can be used, for example, in static induction devices such as transformers and reactors. Moreover, the laminated core may be the laminated core itself used in a transformer or the like, or may constitute a part thereof. For example, the E-shaped laminated core described above is completed as a laminated core used in transformers and the like by assembling the remaining yokes, and therefore constitutes a part of the laminated core used in transformers and the like. It is.

In this embodiment, the case where the plate-like pieces 10 are conveyed in the longitudinal direction to the upper side of the stacking table 51 has been described, but this does not have to be the case. For example, the plate-like piece 10 may be conveyed in its lateral direction up to the conveying portion 52 of the stacking device 5, and the plate-like piece 10 may be conveyed in its lateral direction in the conveying portion 52 as well. good too. In either case, the position of the plate-like piece 10 when it is dropped onto the stacking table 51 from the conveying section 52 is preferably the same position as described above. be.

Moreover, in the present embodiment, the case where an air cylinder is used for moving various moving objects in the linear direction has been described, but this need not be the case. For example, a solenoid or other mechanism may be used for movement of the movable object.

Also, the magnets described in the present embodiment may be, for example, permanent magnets or electromagnets. When an electromagnet is used as the magnet, for example, when the attraction force of the electromagnet does not reach the plate-like piece 10 to be conveyed, the power of the electromagnet should be turned off. Therefore, for example, when an electromagnet is used as the magnet 52b of the conveying unit 52, the attracting force of the magnet 52b can be prevented from reaching the plate-like piece 10 to be conveyed without using the lifting mechanism 52c.

Further, in the present embodiment, the case where the holding portion 55 holds the front end of the plate-like piece 10 with the magnet 55a has been described, but this does not have to be the case. For example, the holding portion 55 may hold the front end of the plate-like piece 10 with a vacuum suction pad or the like. Even in this case, the force with which the holding portion 55 holds the front end of the plate-like piece 10 is such that the plate-like piece 10 falls from the holding portion 55 when the plate-like piece 10 contacts the plate-like piece stopper 53 . A moderately weak one is preferred.

Further, in the present embodiment, the case where the stacking device 5 includes the guide portion 58 for positioning the plate-like piece 10 on the stacking table 51 has been described, but this need not be the case. For example, when the plate-like piece 10 is appropriately positioned in the lateral direction using a guide portion in the conveying portion 52 or the like, the stacking device 5 has a guide portion 58 for positioning in the stacking table 51 . You don't have to. In such a case, the plate-like piece stopper 53 positions the front end of the plate-like piece 10 in the longitudinal direction on both sides of the holding portion 55 (the upper side and the lower side of the holding portion 55 in FIG. 4). It is preferred to do so. This is to prevent the plate-like piece 10 from rotating due to contact with one plate-like piece stopper 53 . Thus, the number of plate-like piece stoppers 53 that the stacking device 5 has may be two or more.

Further, in the present embodiment, the stacking pressing mechanism 57, which is a rotary clamp cylinder, presses the plate-like piece 10 on the stacking table 51, but the method of pressing the plate-like piece 10 does not matter. For example, the plate-like piece 10 on the stacking table 51 may be held down by a configuration similar to the stacking holding mechanism 76 or the like. Even in such a case, it is preferable that the holding portion or the like existing between the existing plate-like piece 10 on the stacking table 51 and the plate-like piece 10 to be newly stacked has a thin structure. is. Therefore, even if the stacking hold-down mechanism holds down the plate-shaped pieces 10 with the same configuration as the stacking hold-down mechanism 76 or the like, the stacking hold-down mechanism does not have an air cylinder attached to the mounting plate, for example. Alternatively, the plate-like piece 10 may be pressed from above by a pressing portion attached to the mounting plate by moving the base end side of the rail in the vertical direction. Also, the number of stacking holding mechanisms 57-1 and 57-2 belonging to the first and second groups does not matter. For example, the number of stacking holding mechanisms 57-1 belonging to the first group may be one, or two or more. Also, the number of stacking holding mechanisms 57-2 belonging to the second group may be one, or may be two or more.

Further, in the present embodiment, the case where the stacking device 5 has the stacking holding mechanism 57 has been described, but this need not be the case. For example, if the plate-like piece stopper 53 has a shape capable of forming a stepped shape at the front ends of the stacked plate-like pieces 10, it can be engaged with the edge of the plate-like piece block shown in FIG. When stacking any of the plate-like pieces 10 constituting the plate-like piece block 10a, the already stacked plate-like pieces 10 other than those to be stacked are also stacked. It is positioned by the plate-like piece stopper 53 . Therefore, at that time, even if the plate-like piece 10 to be stacked is moved to the front end side by the holding portion 55, the plate-like piece 10 that has been stacked up to that point will not be displaced. 5 may not have the stacking holding mechanism 57 . However, when using such a plate-like piece stopper 53, it is necessary to set the position of the plate-like piece stopper 53 with high accuracy including the height direction.

Also, in the present embodiment, the case where the laminated core manufacturing system 1 includes the transfer device 3 and the transport conveyor 4 has been described, but this does not have to be the case. The laminated core manufacturing system 1 does not need to include the transfer device 2 and the transport conveyor 4 as long as the plate-like pieces 10 to be stacked are transferred to the stacking device 5 by some means. For example, the plate-like piece 10 may be handed over to the conveying unit 52 of the stacking device 5, or the plate-like piece 10 may be handed over to the conveying unit 52 by another configuration.

Further, in the present embodiment, the tooth portion 71 is divided into the first and second tooth portions 81 and 82, and the first and second advance/retreat mechanisms 73 and 74 are used to advance and retreat the respective tooth portions 81 and 82. I explained it, but it doesn't have to be. The tooth portion 71 may not be divided into the first and second tooth portions 81 and 82, and a single forward/backward mechanism may be used to move the tooth portion 71 forward and backward. For example, when the plate-like piece blocks 10a to be transported reach the stacking position, the advancing/retracting mechanism stacks the plate-like piece blocks 10a by retracting a plurality of teeth toward the fork base portion 72 side. may Even in that case, it is preferable to use the plate-like piece block stopper 77 so that the plate-like piece blocks 10a to be stacked are not shifted when the plurality of teeth are retracted. In addition, when there is a portion with a large tooth interval, the lamination holding mechanism 76 is used to move the plate-like piece blocks 10a to be stacked downward at the portion with a large tooth interval when retracting the plurality of teeth. You may make it press to the side. Moreover, even when the tooth portion 71 is divided into a plurality of parts, the way of division may be different from that in the present embodiment.

Also, in the present embodiment, the case where the fork portion 62 has the plate-like piece block stopper 77 and the stopper moving mechanism 78 has been described, but this does not have to be the case. If the plate block 10a can be prevented from slipping when the plurality of teeth 81a and 82a are retracted by the lamination pressing mechanism 76 or other slip prevention mechanism, the fork portion 62 can be provided with the plate block stopper 77 or the stopper. It may not have the moving mechanism 78 .

Moreover, although the case where the fork part 62 has the lamination pressing mechanism 76 has been described in the present embodiment, this need not be the case. If the plate-like block stopper 77 can prevent the plate-like block 10a from being displaced when the teeth 81a and 82a are retracted, the fork portion 62 does not need to have the lamination pressing mechanism .

Further, in the present embodiment, the case where the fork portion 62 has an advancing/retreating mechanism (for example, the first and second advancing/retreating mechanisms 73 and 74) that advances and retreats a plurality of teeth has been described, but this need not be the case. For example, when the fork portion moving mechanism 61 of the transport stacking device 6 stacks the plate-like piece blocks 10a to be transported by retracting the fork portion 62 itself at the stacking position of the plate-like piece blocks 10a, the fork portion 62 may not have an advance/retreat mechanism. In that case, for example, when the entire fork portion 62 is retracted, the stopper moving mechanism 78 advances the plate block block stopper 77 according to the retraction of the entire fork portion 62, that is, the world coordinate system By controlling the positions of the plate-like piece block stoppers 77 in the (global coordinate system) not to change, the plate-like piece blocks 10a to be stacked may be prevented from shifting.

Further, in the present embodiment, the position of the first tooth portion 81 is shifted to the second position by the contact between the projecting portion 81e of the first tooth portion 81 and the L-shaped notch portion 82f of the second tooth portion 82. Although the case where it can be aligned with the position of the second tooth portion 82 has been described, the protruding portion 81e and the L-shaped notch portion 82f may not be provided. If they are not provided, for example, the first advance/retreat mechanism 73 also advances and retreats the first tooth 81 by means of a ball screw, thereby accurately aligning the positions of the first and second teeth 81 and 82. may be made possible.

In the present embodiment, the stacking can be performed appropriately even if the plate-like piece 10 is not provided with a hole for positioning, but the plate-like piece 10 may be provided with the hole. In that case, for example, at the stacking position, the plate-like piece 10 may be prevented from slipping by passing a guide pin through the hole. Specifically, the guide pin can extend upward from the bottom, and when a new plate block 10a is stacked, the tip of the guide pin extends from the top surface of the core laminate. preferably not. Further, after the plate-like piece blocks 10a are stacked, the guide pins may be extended upward. Further, when the plate-like pieces 10 are provided with holes, the holes may be used when binding the plate-like pieces 10 in order to prevent the plate-like pieces 10 from shifting in the laminated core.

Further, in the present embodiment, the case of manufacturing an E-shaped laminated core has been mainly described, but a laminated core including a second yoke may be manufactured. For example, in order to prevent the laminated core from slipping or collapsing during transportation, the laminated core including the second yoke is manufactured in such a manner and then transported. , the second yoke may be assembled again.
Moreover, in the present embodiment, the case of manufacturing a laminated core having one central leg has been described, but the laminated core to be manufactured may have two or more central legs. The laminated core to be manufactured according to the present embodiment may be, for example, a three-phase five-leg laminated core having three center legs. Also, a laminated core without a center leg may be manufactured. Thus, the laminated core manufactured by the laminated core manufacturing system 1 may have any configuration as long as it is manufactured by stacking a plurality of plate-like piece blocks 10a.

Moreover, in the present embodiment, the case where the plate-like piece blocks 10a are laminated by, for example, the step lap bonding shown in FIG. 15 has been described, but this need not be the case. The platelet blocks 10a may be laminated by step-lap joints other than that shown in FIG. 15, or may be laminated by other joints such as butt-lap joints.

Further, in the present embodiment, since the structure of the joint portion of the laminated core is step-lap joint or butt-lap joint, the case where the plate-like pieces 10 are stacked on the stacking table 51 in the stacking device 5 I explained it, but it doesn't have to be. When constructing a laminated core that does not have a stepped joint structure such as a step lap joint, in a stacking device having a platform similar to the stacking platform 51, the plate-shaped pieces are not displaced in the longitudinal direction. Blocks may be constructed. Then, a laminated core without a stepped joint structure may be manufactured by conveying and laminating such plate-like piece blocks by the conveying and laminating device 6 .

Further, in the present embodiment, the laminated core manufacturing system 1 has both the stacking device 5 and the conveying and laminating device 6, and the laminated core is automatically manufactured by using both of them. has been described, but it does not have to be. For example, the stacking may be performed manually, and the plate-like piece blocks 10a constructed by the hand may be automatically transported and stacked by the transporting and stacking device 6 . Further, for example, the stacking of the plate-like pieces 10 is automatically performed by the stacking device 5, and the plate-like piece blocks 10a configured by the stacking device 5 are manually conveyed and stacked to stack the blocks. An iron core may be manufactured.

Moreover, it goes without saying that the present invention is not limited to the above-described embodiments, and that various modifications are possible and are also included within the scope of the present invention.

As described above, according to the method for manufacturing a laminated core according to the present invention, for example, the effect of being able to automatically manufacture a laminated core is obtained, and it is useful as a method for manufacturing a laminated core.

1 Laminated Core Manufacturing System 5 Stacking Device 6 Transfer Stacking Device 10 Plate Piece 10a Plate Piece Block 51 Stacking Table 51a Recess 52 Transfer Section 53 Plate Piece Stopper 54 Plate Piece Stopper Moving Mechanism 55 Holding Part 56 Holding Part Movement Mechanisms 57, 57-1, 57-2 Stacking holding mechanism 57a Holding part 57b Holding part moving mechanism 58 Guide part 61 Fork part moving mechanism 62 Fork part 71 Tooth part 72 Fork base part 73 First advancing/retreating mechanism 74 Second advancing/retreating mechanism 76 Stacking holding mechanism 77 Plate block block stopper 78 Stopper moving mechanism 81 First tooth portion 81a Teeth (teeth of the first group)
82 second tooth 82a tooth (second group of teeth)

Claims (4)

forming a plate-like piece block on a table by stacking plate-like pieces used in a laminated core;
a step of manufacturing a laminated core by transporting and laminating plate-like piece blocks configured by the above step,
In the base, a plurality of concave portions extending in the lateral direction of the plate-like piece arranged on the base are arranged in parallel along the longitudinal direction of the plate-like piece,
The step of manufacturing a laminated core by transporting and laminating the plate-like piece blocks includes:
a fork portion having a plurality of teeth arranged in parallel so as to be insertable into a plurality of recesses of the table lifts and conveys a plate-like piece block on the table;
When the plate-like piece blocks to be conveyed are in the stacking position, the fork portion has the plurality of teeth on the fork base side with respect to the fork base portion that holds the plurality of teeth so as to be able to move back and forth in the longitudinal direction. stacking the plate-like piece blocks in a stacking position by retracting them ;
The plurality of teeth are divided into first and second groups, and the teeth of the first and second groups are independently advanceable and retractable,
In the step of stacking the plate-like piece blocks to be conveyed at the stacking position, the teeth of the first group are retracted to the fork base side, and a stack holding mechanism that presses down the plate-like piece blocks to be stacked is operated by the stacking holding mechanism. At a position where the teeth of the first group no longer exist, the plate-like piece block is pressed downward, and in a state in which the plate-like piece block is pressed downward by the stack pressing mechanism, the teeth of the second group to the fork base side to release the plate-like piece blocks from being held down by the lamination hold-down mechanism . 2. The method of manufacturing a laminated core according to claim 1, wherein in the step of forming the plate-like piece block, the plate-like piece block is formed by overlapping the plate-like pieces while shifting them in the longitudinal direction. The laminated core is a portion of a laminated core having first and second yokes, first and second side legs, and a center leg, and is composed of a first yoke, first and second side legs, and a center leg. and
The joints of the plate-like pieces between both ends of the central leg and the central portions of the first and second yokes are V-shaped with cuts on the sides of the first and second yokes. 3. The method of manufacturing a laminated core according to claim 1, wherein step lap joints are sequentially shifted in the longitudinal direction of the central leg. In the step of stacking the plate-like piece blocks to be conveyed at the stacking position, movement of the plate-like piece blocks to be stacked in the backward direction is prevented by the plate-like piece block stopper when the plurality of teeth are retracted. 4. The method for manufacturing a laminated core according to any one of claims 1 to 3 .

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