JPS6347322B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an iron core manufacturing apparatus for manufacturing iron cores for reactors, transformers, etc.

Generally, as shown in Figure 1, the core of a three-phase internal iron type transformer is such that one end of each leg iron 1, 2, and 3 is connected by each yoke 4, 5, and each leg iron 1 to 3 is connected to one end of each leg iron 1, 2, and 3. After the coils 6, 7, and 8 are arranged, the other ends of the leg irons 1 to 3 are connected with the respective yokes 9, 10.

Each leg iron 1 to 3, each yoke 4, 5, 9, 10 is the second
As shown in Figures and Figure 3, 45 strip-shaped iron core members are
It is made up of pieces cut at an angle of . That is, the leg irons 1 and 3 have holes 11a, 12a, 13a, 1
Each core piece 11, 12, 13, 14 with 4a
The leg iron 2 has each iron core piece 15, 16 with holes 15a, 16a, and the yoke 4, 5 has holes 17a, 18a,
Each core piece 17, 18, 1 with 19a, 20a
9 and 20, and the yokes 9 and 10 are each iron core pieces 21 and 2.
2, 23, and 24 are laminated as shown in FIGS. 4 to 6, respectively. In addition, each leg iron 1 to 3
As shown in FIG. 7, the cross section of the iron core piece is formed by stacking iron core pieces of different widths to form a substantially circular shape.

When stacking as described above, leg irons 1 to 3 are cut in the shapes shown in Figures 2 and 3 in advance.
Iron core piece for yoke 4, 5 and yoke 9,
After sorting into 10 core pieces, they are transported to a surface plate for assembly, and multiple people work on stacking them.

Another method is to replace the iron core pieces for leg irons 1 to 3 with the 4th
As shown in the figure, the iron cores are arranged at predetermined intervals, and sent by chute into the assembly jig of the surface plate for lamination in the next step, where they are brought to a natural stop by the frictional resistance between the cores. As shown in FIG. 1, the final positioning of each core piece and the stacking of yokes 4 and 5 were performed manually. In this case, in order to stack the stacks as shown in Figure 7, the positioning jig for the next core piece must be set each time the stacking work for each layer is completed, which is a cumbersome work. Ta.

As described above, the conventional laminating method has the drawback that most of the work is done manually, which requires a lot of time. In addition, there was a drawback that each core piece was distorted when handled, leading to an increase in iron loss.

This invention was made to solve the above-mentioned drawbacks, and the core pieces for leg irons are laminated on the stacking table from one end side of the stacking table by a first conveyor, and a second conveyor passes over the top of the stacking table. To provide an iron core manufacturing apparatus which can easily assemble iron core pieces for a yoke by conveying the iron core pieces for the yoke to a workbench arranged on the other end side of the stacking table.

The figures will be explained below. In FIGS. 8 to 10, reference numeral 25 denotes a horizontally arranged stacking cart for stacking iron cores, which has wheels 25a for running. 26
27 is a jack that moves the support rod 26 up and down; 28 is a drive mechanism for the jack 27; 29 is a rail for running the stacked cart 25; and 30 is a jack that moves the stacked cart 25 to the left in the figure. A stopper 31 for preventing movement is a gate-shaped support cart arranged to straddle the stacked cart 25, and has wheels 31a for running. 32 is a running rail for the frame body 31, and 33 and 34 are adjustment tables arranged on the upper surface of the laminated truck 25, which are configured to be movable in the left and right directions with respect to the traveling direction of the laminated truck 25. 35a, 3
5b is an adjustment rod screwed together with the adjustment tables 33 and 34;
Each adjustment table 33 is driven by a drive device (not shown),
34 in the direction of approaching or moving away.
The upper ends of the pins 36a and 36b are constructed as shown in FIG. 11, and are pins fitted into the laminated cart 25 and the adjustment tables 33 and 34, into which the holes of the core pieces 11 to 16 can be fitted. Reference numeral 37 denotes a transport carriage mounted on the support carriage 31 and movable in the left and right directions with respect to the traveling direction of the support carriage 31, and is driven by a drive device (not shown). Reference numeral 38 denotes a suspension trolley that is suspended from the carrier 37 via wheels 39 and is movable in the left and right directions with respect to the traveling direction of the support carrier 31; 40 is a frame fixed to the carrier 37; 41 is the carrier 37; The distance between the suspension truck 38 and the frame 40 can be adjusted by rotating an adjustment rod screwed onto the suspension truck 38.

42 is a first conveyor mounted on the suspension cart 38, and 43 is a second conveyor mounted on the frame 40. Note that both conveyors 42 and 43 are
As shown in FIGS. 2 to 14, it is constituted by 45 to 50, which will be described later. 44 is a bearing fixed to the suspension truck 38 and the frame 40; 45 is the bearing 4;
4, which is driven by a drive (not shown). 46 is a belt suspended on the pulley 44; 47 and 48 are a pair of permanent magnets each having an N pole and an S pole facing the belt 46;
Numeral 49 is a magnetic force adjusting plate having magnetism attracted to permanent magnets 47 and 48, and 50 is a holding plate that presses the belt 46 downward so that the belt 46 can slide. 51 is a connecting rod connecting two pairs of permanent magnets 47, 48, and 52 is a lifting link connected to connecting rod 51, which is driven by a drive device (not shown) to lift and lower the permanent magnets 47, 48. A first sensor 53 is fixed to the suspension cart 38 and the frame 40 and detects when the core pieces have fallen from both conveyors 42 and 43. The sensor 53 is composed of a beam switch and the like that detects the distance by reflecting light. There is. A second sensor 54 is composed of a beam switch or the like fixed to the suspension truck 38 and the frame 40, and detects the distance to the core pieces stacked on the stacked truck 25.
A third sensor 55 is fixed to the suspension truck 38 and the frame 40 and is composed of a beam switch or the like, and detects the front end of the iron core piece conveyed by both conveyors 42 and 43. Reference numeral 56 denotes a movable table provided on the suspension cart 38 and the frame 40 and movable in the horizontal direction shown in FIG. A feed screw 59 screwed onto the moving table 56 is a handle fixed to the feed screw 58, and is rotatably supported by the suspension cart 38 or the frame 40. Reference numerals 60 and 61 indicate a fourth sensor and a fifth sensor, which are fixed to the movable table 56 and constituted by a beam switch, etc., and detect holes in the iron core piece. 62 is a third conveyor that conveys the core pieces 11 to 16 for leg irons 1 to 3; 63 is both conveyors 42;
43 and a guide arranged between the third conveyor 62,
64 is a fourth conveyor that conveys the core pieces 17 to 20 for the yokes 4 and 5; 65 is a flapper that sends each core piece to the third conveyor 62 or the fourth conveyor 64; and 66 is the upper part of the support cart 31. A fifth conveyor 67 provided between the fourth conveyor 64 and the fifth conveyor 66 is a sixth conveyor provided between the fourth conveyor 64 and the fifth conveyor 66, and conveys the iron core piece while holding it with a permanent magnet 67a. 68 is a fixed frame with four supporting columns 69
It is supported by Reference numerals 70 and 71 refer to first and second parts supported by the fixed frame 68 so as to be movable in the vertical direction.
The table has grooves in the longitudinal direction, as shown in FIG. 15, and is arranged in upper and lower stages so that the holes in the core can be easily detected. 72 is both tables 7
A lifting cylinder that drives 0.71 in the vertical direction.
It is provided on the fixed frame 68. 73 is a shooter that transfers the core piece to the lower right, 74 is both tables 7
This is a pinch roller provided between the shutter 73 and the shutter 73, and is driven by a variable speed motor (not shown). 75 is a sixth sensor composed of a beam switch and the like arranged opposite to the shooter 73;
The rear end of the iron core passing through the shooter 73 is detected. A workbench 76 is supported by a support column 69 and driven in the vertical direction by a drive device (not shown). 7
Reference numerals 7 and 78 are robots that take out iron core pieces from the respective tables 70 and 71, carry them to predetermined positions on the stacking cart 25, and stack them.The main parts are 79 to 86 as shown in FIGS. 16a and 16b. It is arranged in correspondence with each lower leg iron. In FIGS. 16a and 16b, rotary arms 79 and 80 are rotatably connected, and a holding arm 81 is rotatably connected to the tip of rotary arm 80. The holding arm 81 is provided with a vacuum pad 82 that attracts the iron core piece. A first
As shown in Figure 6, the 7th to 7th stages detect holes in the iron core.
Ten sensors 83-86 are provided. In addition,
The robots 77, 78 are controlled by a computer and servo motors (not shown), and each rotating arm 79, 80
and the holding arm 81 are configured to rotate by a predetermined angle. Reference numerals 87 and 88 designate positioning devices provided on the workbench 76, which in detail are comprised of 89 to 91 as shown in FIG. 17a, and are arranged in pairs with the respective robots 77 and 78. In Figure 17a, 89
90 is an alignment member fixed to the tip of the operating arm 89, and has a horizontal surface portion 90a that receives the iron core piece, and a horizontal surface portion 90a that receives the iron core piece, Vertical portion 90b that comes into contact with the end face of the laminated core pieces
and has. A proximity switch 91 detects the end of the core piece, and is fixed to the alignment member 90.

As shown in FIG. 21, which will be described later, the iron core pieces for the leg irons 1 and 3 are attached to the horizontal surface portion 9 of each positioning device 87 and 88.
If the horizontal surface portion 90 slides on the upper surface of 0a and then falls after being positioned by the conveyors 42 and 43, that is, in the state shown in FIG.
If there is no a, the state shown in FIGS. 17b and 17c will change to the state shown in FIGS. 17d and 17e, and the already laminated yoke core pieces will be pushed out, or Alternatively, a problem arises in that the leg iron core pieces are stacked with their tips bent. In other words, for complete automation, the horizontal surface section 90a
plays an important role.

Next, the operation will be explained. An example of assembling the E-shaped core shown in FIG. 1 using the core pieces shown in FIGS. 2 and 3 will be described. Figures 8 to 16 a, b and 1
In FIG. 7a, the core piece 11 processed in the cutting and drilling line in the previous process is sent to the flapper 65.

At this time, the flapper 65 is operating downward,
The iron core piece 11 is fed on the upper surface of the third conveyor 62 and delivered to the lower surface of the first conveyor 42. In this case, both conveyors 42, 62 are operated at the same speed, and the first conveyor 42 is operated at the speed shown in FIG.
_V1 . Then, the front end of the iron core piece 11 is connected to the third
When passing the sensor 55, the first conveyor 42
The servo motor driving the motor enters the stopping process at a predetermined deceleration. At this time, the core piece 11 is similarly decelerated and stopped at a predetermined position as shown in FIG. 19. The iron core piece 11 is connected to the permanent magnet 4 via the belt 46.
7 and 48, and is adjusted to an appropriate strength so that it will not slip between the belt 46 and the iron core piece 11 even when decelerated. If the attractive force of this permanent magnet is too strong, the energy for driving the belt 46 will increase. Furthermore, when raising the permanent magnet and dropping the iron core piece, there is a drawback that a large upward stroke must be taken.

To this end, the attractive force of the permanent magnets is first strongly magnetized, and as shown in FIG. be. By changing the thickness of this steel strip, the magnetic force generated at the lower ends of the permanent magnets 47, 48 can be adjusted. Now, fast
The iron core fed at V ₁ is decelerated at point E and stopped at point F after T ₁ seconds, as shown in Fig. 18. This stopped state is shown in Fig. 19, and at this time, the stopping position due to high-speed feeding, that is, the tip of the iron core piece and the first
The distance L from the right end of the conveyor 42 to the right end of the conveyor 42 is made as small as possible to shorten the distance for feeding at medium speed _V2 shown in FIG. This will reduce the overall lamination time. For this purpose, as shown in FIG.
For L ₁ , if high speed is V ₁ , deceleration is α, and the maximum width of the iron core piece is H, each cut plane is 45 degrees and detection is performed at the center in the width direction, so L ₁ = 2/1H + V ₁ ² /2α. Or, if the time until stopping is T ₁ , L ₁ =
1/2×(H+V ₁ ×T ₁ ).

When the first conveyor 42 stops, the carrier 37 moves by a distance 1 in the direction of the arrow as shown in FIG. 20, and the second conveyor 43 is moved to the center position. This movement is performed under NC control, so that no impact is applied during acceleration or deceleration. This dimension 1 is determined by each leg iron 1 as shown in FIGS. 1 and 6.
Equal to the distance between ~3. While the carriage 37 is moving from the position shown in FIG. 19 to the position shown in FIG. 20 in T ₂ seconds, the second conveyor 43 starts moving and reaches a speed of V ₁ . When the movement of the transport vehicle 37 is completed, the operating arm 89 of the positioning device 87
Move forward in the direction of 5. Subsequently, the iron core piece 11
It is sent forward at a medium speed V ₂ as shown in Figure 8. At this time,
Since the tip of the iron core piece 11 is removed from the position facing the permanent magnets 47, 48, the tip hangs down due to its own weight and can slide on the upper surface of the horizontal surface portion 90a of the positioning device 87, as shown in FIG. If the hole 11a of the iron core piece 11 passes the fourth sensor 60 during this process, it operates at a deceleration α similar to the deceleration at the high speed V ₁ and the low speed V ₃ as shown in FIG. become.

Further, the hole 11a moves forward at a speed of V ₃ and the hole 11a becomes the fifth hole.
When detected by the sensor 61, the first conveyor 4
2 stops. At this time, the time T ₃ at the speed V ₃ is set to the shortest time during which various different iron core pieces are conveyed and there is no variation in stopping accuracy. That is, the distance _L2 between the fourth sensor ⁶⁰ and ^the fifth sensor 61 is _L2 =1/2α×( _V12 − _V22 )+ _V3 × _T3 .

In addition, in order to shorten the conveyance time by the conveyors 42 and 43, it is desired to position the iron core at a high speed of speed V ₁ compared to speed V ₂ , but since the conveyors 42 and 43 do not have guides in the width direction of the iron core, It may shift slightly laterally during transportation. Therefore, in cases where the fourth sensor 60 does not detect holes, etc.
If the sensor malfunctions or holes are not drilled in the cutting and drilling line in the previous process, the core piece will fly out of the conveyor at a high speed of _V1 . This means that the iron core piece is 0.3mm or 0.35mm.
Because it is extremely thin (mm thick), the blade appears to be sticking out.

If a worker acts on behalf of the robot 77 to stack the yokes faster than the robot 77,
Very dangerous. For this reason, the speed _V2 is such that the tip of the core piece moves downward under its own weight and naturally falls in front of the worker.

On the other hand, since the stop from V ₁ in the conveyors 42 and 43 is detected by the end face of the iron core piece, it will not fly out at high speed unless the third sensor 55 fails.

If the third sensor 55 fails to detect a malfunction, a safety measure is taken so that the next fourth sensor 60 issues an emergency stop command and automatically stops.

When the iron core piece 11 stops at a predetermined position as shown in FIG. 22, the four sets of permanent magnets 4 of the conveyor 42
7 and 48 rise at the same time. Then, the iron core piece 11
Since the adhesion force between the permanent magnets 47 and 48 is lost, the core piece 11 falls off one after another from the tip, and the hole 11a of the core piece 11 connects to the two pins 36b.
and stacked in place. In this case, the positions of the hole 11a and the pin 36b are adjusted by turning the handle 59. In order to maintain this falling distance at about 80 mm, the height of the stack is detected by the second sensor 54. If this second sensor 54 turns ON,
The jack 27 that raises the stacked truck 25 is driven, and the jack 27 is lowered until the second sensor 54 turns OFF, and then stopped. Further, confirmation that the core piece 11 has fallen is performed by the first sensor 53, and when it is turned off, the transport carriage 37 can be moved.

As shown in FIG.
At the time when the lateral movement is completed in step 7, the loading of the core piece 15 for the leg iron 2 in the center begins. First, the iron core piece 1 is carried into the second conveyor 43 at high speed.
5 is stopped inside the second conveyor 43 as shown in FIG. As soon as the stop is complete, at medium speed _V2 ,
The iron core piece 15 is fed again by a predetermined amount until it becomes as shown in FIG. 23, and then the iron core piece 15 falls. Sunahachi, leg iron 2
In the case of the core piece 15 used for this purpose, all other operations are the same as the core piece 11 except that there is no lateral movement.

The iron core piece 15 falls and the first conveyor 53
When turned OFF, the second conveyor 43 starts rotating at a high speed, and when it reaches a speed of _V1 , the leg iron 1 is turned off.
The iron core piece 12 for use is allowed to enter. During this time, the core piece 21 for the upper yoke 9 is automatically taken out at the rear of the cutting line, which is the previous process. Subsequently, the flapper 65 moves to the upper position, and the cut and drilled core piece 17 for the lower yoke 4 passes through the fourth conveyor 64, the sixth conveyor 67, and the fifth conveyor 66. The sheet slides through the shutter 73, enters between the rotating pinch rollers 74, and is sent to the upper surface of the first table 70 at the lower stage for taking out the yoke. At this time, the sixth sensor 75 detects the rear end of the iron core piece 17, applies a predetermined deceleration to the pinch roller 74, controls the protrusion of the iron core piece 17, and pinches the first table 70 as much as possible. Pinch roller 74 so that it stops on the side closer to roller 74
The final velocity of is adjusted. When the core piece 17 is placed on the first table 70, the first table 70 is lowered and stopped at a position where the robot 77 or the operator can easily take it out. When the robot 77 stops, it starts performing basic actions that have been memorized in advance.
While moving in the direction of arrow D in Fig. 16a,
Look for hole 17a at No.7. And four sensors 83
~ When all 86 are in the OFF state, the rotating arm 7
9, 80 and the holding arm 81 are lowered, and when the vacuum pad 82 comes into contact with the core piece 17, vacuuming is started and the core piece 17 is attracted. Next, the rotating arm 79,
80 and holding arm 81 are raised by a predetermined amount, and the first
It moves as shown by arrow E in Figure 6a and comes to the pre-memorized position. At this time, the hole 17a of the iron core piece 17 comes to the center position of the pin 36a shown in FIG. Next, only the holding arm 81 is rotated in the direction of arrow F, so that the side surface of the iron core piece 17 is aligned with the positioning device 87.
When the proximity switch 91 is activated, the holding arm 81
The rotation of the iron core piece 17 is stopped, air is introduced into the vacuum pad 82, and the iron core piece 17 is dropped. At this time, iron core piece 17
When it is attracted to the vacuum pad 82, both ends are hanging down, so a gap is created at the joint with the core pieces 11 and 15 for the leg irons 1 and 2, and the core piece 17 stretches at the same time as it falls. This makes it easy to match the seams. However, in order to align the laminated end faces, the position of the proximity switch 91 must be placed slightly to the rear so that the core pieces are stacked slightly protruding, and then when the core pieces for the next yoke are stacked, the positioning device It is more effective to align them on the side surface of the vertical portion 90b of 87.

Further, as shown in FIG. 16a, the operation of the robot 77 from taking out each core piece from the first table 70 to stacking the core pieces is such that the robot 77 only needs to horizontally rotate each core piece by 90 degrees. . In other words, it is a feature of the present device that the material is fed to the flapper 65 in the cutting order as shown in FIGS. 2 and 3.

Now, by the time the iron core pieces 17 for the yoke 4 have been stacked, the iron core pieces 12 for the leg iron 3 will be placed in the positions shown in FIGS. 24 to 25.
After passing through the state shown in the figure, the state shown in FIG. 26 is reached. At this time,
Like the core piece 21, the iron core piece 22 for the upper yoke 10 is automatically taken out at the cutting line in the previous process. Subsequently, the core piece 18 for the lower yoke 5 rides on the second table 71 via each conveyor 64, 67, 66. Incidentally, when the first table 70 is lowered, the second table 71 lowers a little to receive the iron core piece passing through the pinch roller 74. In other words, the second table 71 descends once more and is delivered to the robot 78, so it performs a two-stage operation when descending.

In this way, by the time the other robot 78 takes out the core piece 18, the core piece 16 for the next layer, the central leg iron 2, has been brought in, as shown in FIG. As shown in FIG. 27, they are dropped to a predetermined position and stacked. Iron core piece 18 with robot 78
By the time the iron core pieces 13 for the next leg iron 1 are laminated,
is stopped within the first conveyor 42 as shown in FIG. 27, and this state is the same as in FIG. 19.
Next, as shown in FIG. 20, and then as shown in FIG. 28, the core pieces 13 are dropped to a predetermined position and stacked. During this time, the iron core pieces 14 for the leg irons 3 are carried in, and the carriage 37 moves laterally. At that time, the lower leg iron 4
The core pieces 19 are laminated by a robot 77. This state is similar to that of the core piece 17 shown in FIG. Thereafter, the first layer, that is, the second layer is also laminated in the same way as the laminated state shown in FIG. 4, and thereafter the state of the first layer and the second layer are repeated and laminated. In other words, during one reciprocation of the transport vehicle 37, the iron cores are stacked one layer at a time in numerical order. Then, when the desired height is reached, the core width is changed and more layers are layered.
Lamination is completed in the final state shown in FIG.

When the lamination work is completed, the support cart 31 moves to the left in the figure, as shown in FIG.
Open the top and take out the pins 36a and 36b. When the pins 36a and 36b are removed, the workbench 76 is raised, and the stacking cart 25 moves by itself to the right in the figure, and goes to the core framing station for the next process, where it is framed.

In addition, at about 20mm of the straight part that serves as a guide for the iron core hole,
After the core stacking is completed, the laminated truck 25 is moved to the running rail 29.
When you step on top of the pins 36a and 36b, the straight parts at the tips of the pins 36a and 36b will come out of the holes in the iron core.
It is now easier to pull out 6b upwards. In other words, if there is a straight part in contact with the core hole over the entire height of the stack, it will be extremely difficult to pull out due to frictional force.

For example, if a failure occurs in the equipment during lamination work, or if a plate with irregularities called an oil duct is inserted between each lamination when large width core pieces are laminated, or if the iron core When checking the laminated state of the pieces, that is, whether the dimensions of the E-shape are accurate or whether the iron core has fallen, etc., at each stack, the support cart 31 is moved to the 29th position.
Perform the work by moving it as shown in the diagram.

According to this invention, the core pieces for the leg irons are stacked on the stacking table from one end side of the stacking table by the first conveyor, and the iron core pieces for the yoke carried into the one end side of the stacking table are stacked on the first conveyor.
The stacking work can be carried out quickly by conveying the workpieces to the work station located at the other end of the stacking table using a second conveyor that passes above the conveyor.

[Brief explanation of drawings]

Figure 1 is a plan view showing the completed lamination of the E-shaped core, Figures 2 and 3 are plan views showing the cut shape of the core piece, Figure 4 is a plan view of the first layer, and Figure 5 is a plan view of the 2nd layer.
A plan view of the layers, FIG. 6 is a plan view showing the laminated state of the first and second layers, FIG. 7 is a sectional view taken along the - line in FIG. 1, and FIG. 8 shows an embodiment of the present invention. 9 is a partially broken front view of FIG. 7, FIG. 10 is a sectional view taken along the - line in FIG. 9, and FIG. 12
The figure is a front view of the conveyor, Figure 13 is a side view of Figure 12, Figure 14 is a sectional view taken along the - line in Figure 12, Figure 15 is a sectional view taken along the - line in Figure 16, and Figure 16 a. is a plan view of the robot, Figure 16b
is a plan view showing the main part of FIG. 16a, FIG. 17a is a front view of the positioning devices 87 and 88, and FIG. FIG. 17c is a front view of FIG. 17b, and FIG. 17d is a plan view showing a state in which the leg iron core pieces have been laminated without the positioning devices 87 and 88. e is a front view of FIG. 17d, FIG. 18 is an explanatory diagram showing the conveyance speed of the conveyor, FIG. 21 is an explanatory diagram showing the operating status of the positioning device, FIG. 22 is a diagram showing the stopping position of the iron core piece, FIGS. 19, 20, and 23 to 28 are explanatory diagrams showing the operating status of the conveyor, and FIG. 29 is an explanatory diagram showing the state after the stacking operation is completed. In the figure, 1 to 3 are leg irons, 4 and 5 are yoke, 11 to 16 are iron core pieces for yoke, 17 to 20 are iron core pieces for yoke,
25 is a stacking truck, 31 is a support truck, 37 is a transport truck, 42 is a first conveyor, 43 is a second conveyor, 76 is a workbench, 77 and 78 are robots, 8
7 and 88 are positioning devices. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims (1)

[Claims] 1 The first and second core pieces for the leg iron are carried into one end of the stacking table and placed in positions facing each other, and the third core piece for the center leg iron is placed in the center of both core pieces. A pair of first conveyors are arranged at intervals where the first and second iron core pieces and the third iron core piece are arranged, and the iron core piece is carried to one end side of the stacking table. transporting the first core piece to a predetermined position on one side of the first conveyor in the lateral direction;
The third core piece is further transferred forward and stacked at a first stacking position, and the third core piece carried into one end of the stacking table is transferred forward on the other side of the first conveyor and stacked at a second stacking position. The second core piece, which has been stacked at the stacking position and further carried to one end side of the stacking table, is placed on the opposite side of the first core piece by sandwiching the third core piece on the other side of the first conveyor. A fourth core piece for a yoke to be combined with each of the above-mentioned core pieces is transferred to a predetermined position in the lateral direction, and then transferred forward to be stacked at a third stacking position. A second conveyor that passes over the first conveyor from one end of the table.
An iron core manufacturing apparatus characterized in that the iron core manufacturing apparatus is configured to be transported by a conveyor to a work table disposed at the other end of the stacking table.