JP5077851B2 - Spacer jig and iron core manufacturing method using the same - Google Patents

Description

  The present invention relates to a spacer jig used in the manufacturing process of electromagnetic equipment cores used for transformers, reactors, etc., and in particular, a spacer used in the manufacturing process of iron cores manufactured by laminating a plurality of magnetic steel plates. The present invention relates to a jig and a method for manufacturing an iron core using the spacer jig.

Patent Document 1 discloses a conventional electromagnetic device core that discloses an electromagnetic device core that avoids the cause of vibration and noise by a joining method in which a defect portion does not exist in the butt joint portion of the iron core. The electromagnetic equipment iron core described in Patent Document 1 is assembled by butt-joining cut portions of a directional silicon steel strip cut in an oblique direction so as to form a rectangular window. The joint of one or a plurality of laminated units is formed at an inclination angle of about 45 ° with respect to the longitudinal direction of the directional silicon steel strip starting from each corner position of the rectangular window. The electromagnetic device core is configured by sequentially laminating the laminated units so that the inclined angles of the joint portions of the upper and lower laminated units adjacent in the laminating direction are different from each other. This stacking is generally done by placing a pair of opposing stacking units, block-stacked to a height of several hundred millimeters, around the coil first, and the remaining opposing iron core (steel strip) as one unit (one or several sheets). The steel strip) is inserted by the operator.
JP 2002-343646 A

  As described above, as a method of manufacturing the iron core, first, a method of joining the magnetic steel plates constituting one laminated unit and the magnetic steel plates constituting the other laminated unit sequentially and alternately is considered. . Further, a method is conceivable in which one laminated unit is produced first, and then a magnetic steel plate constituting the other laminated unit is inserted between the magnetic steel plates of the laminated unit. In this case, when the protruding portion of the magnetic steel sheet to be inserted becomes long, sagging occurs due to the weight of the protruding portion. The amount of sagging varies, and there is also a warp in the overhanging portion. Therefore, the pitch in the stacking direction of the overhang portions tends to be non-uniform. Therefore, it is impossible to insert laminated units composed of many magnetic steel plates at a time, and it is necessary to stack magnetic steel plates one by one or two or three at a time. It took a long time.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a spacer jig that improves the workability at the time of manufacture and a method of manufacturing an iron core using the same.

  The spacer jig according to the present invention is used when an iron core is assembled by combining one steel plate lamination unit and another steel plate lamination unit. In each steel sheet lamination unit constituting the iron core, the first and second magnetic steel sheets are repeatedly laminated so that the second magnetic steel sheet protrudes from the end face of the first magnetic steel sheet to form an overhanging portion serving as a joint. Is formed. The iron core is assembled by sandwiching and joining the overhanging portion of the one steel plate lamination unit and the overhanging portion of the other steel plate lamination unit formed by such lamination.

  A spacer jig according to the present invention includes a first plate-like material having a spacer portion, and a second plate-like material laminated on the first plate-like material in a region other than the spacer portion. The spacer portion is inserted into the gap so as to secure a gap between the second magnetic steel plates stacked adjacent to each other with the first magnetic steel plate interposed therebetween in the one steel plate lamination unit. . Further, the spacer jig of the present invention has a corner portion that becomes an insertion start point in the gap during the insertion.

  The second plate-like material is arranged corresponding to the position where the second magnetic steel plate is laminated in the one steel plate lamination unit. The first plate-shaped material is laminated so as to overlap the first plate-shaped material in a region outside the spacer portion so that the spacer portion of the first plate-shaped material continuously protrudes from the corner portion.

  According to the present invention, by using a spacer jig, it is possible to join and join in block-shaped steel plate lamination unit units by securing a gap to be combined with each other at the joint portion of the steel plate lamination unit. Workability at the time of manufacture is improved.

  Hereinafter, a spacer jig according to an embodiment of the present invention and an iron core manufacturing method using the same will be described with reference to the drawings.

Iron Core to which the Spacer Jig of the Present Invention is Applied First, as a premise for explaining an embodiment of the spacer jig, an iron core assembled by applying the spacer jig will be described with reference to FIGS. FIG. 1 is a diagram illustrating a core structure of a transformer. As shown in FIG. 1, the transformer 10 includes two iron cores 15 and a coil 21. The iron core 15 has an annular shape that forms a closed magnetic circuit. The iron core 15 has a substantially rectangular frame shape. The coil 21 is wound around the two iron cores 15.

  The iron core 15 includes a pair of yoke iron cores 11 and 12 constituting the first steel plate lamination unit of the present invention and a pair of leg iron cores 13 and 14 constituting the second steel plate lamination unit. The yoke iron core 11 and the yoke iron core 12 are arranged in parallel with a space therebetween. The leg iron core 13 and the leg iron core 14 are arranged in parallel with a space therebetween. The yoke iron core 11 is joined to the adjacent leg iron cores 13 and 14, and the yoke iron core 12 is joined to the adjacent leg iron cores 13 and 14, respectively. The yoke iron cores 11 and 12 and the leg iron cores 13 and 14 have a shape extending in a belt shape in the circumferential direction of the iron core 15 having an annular shape.

  The two iron cores 15 are arranged so that the leg iron cores 14 of each iron core are adjacent to each other. A coil 21 is wound around the leg iron cores 14 arranged adjacent to each other. Although not shown, the coil 21 includes a high voltage winding and a low voltage winding.

  If an example is given about the magnitude | size of the iron core 15, the length of the leg iron cores 13 and 14 will be 1000 mm or more and 6000 mm or less, and the width | variety will be 200 mm or more and 400 mm or less. The length of the yoke cores 11 and 12 is 700 mm or more and 1500 mm or less, and the width is 200 mm or more and 400 mm or less. The heights of the leg iron cores 13 and 14 and the yoke iron cores 11 and 12 are 1000 mm or more and 2000 mm or less.

  The transformer is not limited to the type shown in FIG. 1, and may be a type in which a high-voltage winding and a low-voltage winding are wound around a pair of leg iron cores included in the iron core, for example. Further, a type in which a plurality of iron cores exceeding two are arranged and coils are wound around leg iron cores of adjacent iron cores may be used. In general, the leg iron core is an iron core portion around which a coil is wound, and the yoke iron core is an iron core portion that connects the leg iron cores. The leg iron core has a relatively large length with respect to the yoke iron core.

  FIG. 2 is a diagram showing a half of the iron core in FIG. Only the portion shown in the figure will be described below, but the remaining half has the same shape. As shown in FIG. 2, the yoke core 11 includes a plurality of silicon steel plates 41. Each of the leg iron cores 13 and 14 includes a plurality of silicon steel plates 43. The silicon steel plates 41 and 43 are laminated in the vertical direction so that the surfaces thereof extend in the horizontal direction. The silicon steel plates 41 and 43 are thin plates having a thickness of, for example, 0.2 mm or more and 0.5 mm or less, and are ferromagnetic materials having flexibility such that the surface thereof is bent by its own weight.

  FIG. 3 is an enlarged view of a position surrounded by a two-dot chain line III in FIG. 3A is a perspective view, and FIG. 3B is a side view as seen from the direction indicated by the arrow B in FIG. 3A. As shown in FIG. 3, the yoke iron core 11 and the leg iron core 13 are joined to each other by sandwiching the silicon steel plates 41 and 43 constituting each iron core. The structure shown in FIG. 3 will be described in detail. A plurality of silicon steel plates 41 constituting each iron core includes a silicon steel plate 41p as a first magnetic steel plate and a silicon steel plate 41q as a second magnetic steel plate. The silicon steel plate 43 includes a silicon steel plate 43p as a first magnetic steel plate and a silicon steel plate 43q as a second magnetic steel plate. The silicon steel plates 41p and the silicon steel plates 41q are alternately stacked one by one. The silicon steel plates 43p and the silicon steel plates 43q are alternately stacked one by one. At the joining position of the yoke iron core 11 and the leg iron core 13, the end of the silicon steel plate 41q protrudes from the tip of the silicon steel plate 41p, and the end of the silicon steel plate 43q protrudes from the tip of the silicon steel plate 43p. A gap is formed between the silicon steel plates 41q adjacent in the stacking direction. A gap is formed between the silicon steel plates 43q adjacent in the stacking direction. In the yoke iron core 11 and the leg iron core 13, the silicon steel plate 43q is inserted into a gap formed between the silicon steel plates 41q. The iron core is not limited to the form shown in the figure, and a plurality of silicon steel plates 41p, 43p and a plurality of silicon steel plates 41q, 43q may be alternately stacked.

  FIG. 4 is a side view of a laminated unit in which a plurality of silicon steel plates are laminated. As shown in FIG. 4, when the length of the projecting portion of the silicon steel plate 41q protruding from the end portion of the silicon steel plate 41p is increased, the deflection and warpage of the projecting portion due to the weight of the silicon steel plate are likely to occur. Therefore, the gaps formed between the adjacent silicon steel plates 41q are non-uniform because they can be as wide as CL1 and as narrow as CL2.

  FIG. 5 is a diagram showing the shape of a silicon steel plate constituting a general iron core. As shown in FIG. 5, the joint part of the 1st steel plate lamination | stacking unit 12 and the 2nd steel plate lamination | stacking units 13 and 14 which comprise an iron core has a 45 degree inclination angle. In this state, when the steel plate lamination units are inserted and joined to each other, they must be simultaneously inserted on the insertion line 19. When the gap formed between the adjacent silicon steel plates 41q and 43q is non-uniform anywhere on the insertion line 19, the joints of the steel plate lamination units are inserted with interference with each other. I can't.

  FIG. 6 is a view showing the shape of a silicon steel plate constituting an iron core for solving the above-mentioned problems. As shown in FIG. 6, the joint portions of the first steel plate lamination unit 12 and the second steel plate lamination units 13 and 14 each have an inclination angle of a shift angle α around 45 °. For example, α is set to 5 °. By doing in this way, when the steel sheet lamination unit is moved and inserted, the insertion is started from the insertion start point 16. Therefore, if the gaps formed between the silicon steel plates 41q and 43q adjacent in the stacking direction are made uniform at the insertion start point 16, the steel plate stacking units can be inserted into each other. Once the insertion is started, the iron cores can be combined by inserting until the joining portions of the first steel plate lamination unit 12 and the second steel plate lamination units 13 and 14 coincide.

Embodiment 1 of spacer jig
Hereinafter, a spacer jig according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 7 is a side view of the spacer jig according to the embodiment of the present invention, and FIG. 8 is a top view thereof. As shown in FIGS. 7 and 8, the spacer jig 100 of the present embodiment includes a bottom plate 130 at the bottom, and a first plate material 110 and a second plate material 120 are repeatedly stacked on the top. . The order and cycle of stacking are determined in accordance with the order and cycle of stacking in which an overhanging portion to be a joint is formed in the iron core assembled using the spacer jig 100. Although the figure shows a case where the overhanging portion is formed on the bottom plate 130, the overhanging portion is not formed on the bottom plate 130 when the overhanging portion is formed on the lowermost magnetic steel plate of the iron core to be assembled. The bottom plate 130 has a U-shaped portion 131 that is partially U-shaped. A top plate 150 is provided above the first plate material 110 or the second plate material 120 as the uppermost layer. The top plate 150 is provided with a tap, and is provided with a presser screw 160 that presses the first plate material 110 and the second plate material 120 between the bottom plate 130 and the top plate 150. Furthermore, the top plate 150 is provided with a handle 170 at the top thereof. As shown in FIG. 7, the corners in the thickness direction of the end portions of the first plate-like material 110 protruding from the end portions of the second plate-like material 120 may be tapered. If it does in this way, when inserting a spacer jig in the steel plate lamination unit which laminated a plurality of magnetic steel plates, it can insert without the spacer jig getting caught in the corner of the end of a magnetic steel plate.

  9 is a cross-sectional view of the spacer jig along the line IX-IX in FIG. 7, FIG. 10A is a top view of the first plate-like material, and FIG. 9B is a second plate-like material. (C) shows a top view of a state in which the first plate material and the second plate material are laminated. As shown in FIG. 9, the top plate 150, the first plate material 110, the second plate material 120, and the reference block 140 are placed in a U-shaped portion 131 of the bottom plate 130. The top plate 150 and the bottom plate 130 are connected by bolts and nuts that penetrate horizontally from the side surface of the U-shaped portion 131.

  As shown in FIG. 10, the first plate material 110 has a rectangular cutout 113 formed on the lower right side. Further, on the left side, a corner portion 111 and another corner portion 112 are formed above the corner portion 111 in the figure. The second plate material 120 has a rectangular cutout 123 formed in the lower right. Further, a protruding portion 121 and a root portion 122 are formed on the left side. The notch 113 and the notch 123 have the same shape. The cutout portions 113 and 123 serve as a reference for a stacking position when the first plate-like material 110 and the second plate-like material 120 are stacked by inserting the reference block 140 therein.

  The first plate material 110 has a spacer portion 114. The first plate-like material 110 and the second plate-like material 120 are stacked so as to overlap in a region other than the spacer portion 114. The spacer portion 114 is formed such that the length L1 is the shortest in the section between the corner portion 111 of the first plate material 110 and the protruding portion 121 of the second plate material 120. On the other hand, in the section between another corner portion 112 of the first plate material 110 and the root portion 122 of the second plate material 120, the length L2 is formed to be the longest. When the spacer jig 100 is rotated and inserted into the steel plate lamination unit, the corner 111 becomes an insertion start point at which the spacer jig 100 starts to be inserted into the steel plate lamination unit. Another corner portion 112 is located on the maximum turning radius in the turning trajectory, and becomes a tip portion when the spacer jig is inserted at the deepest position from the opening end of the steel plate lamination unit.

Embodiment 2 of spacer jig
FIG. 11 is a top view showing the structure of the spacer jig according to the embodiment of the present invention. The spacer jig 200 has the same configuration as that of the spacer jig 100, but the configuration is the same. As shown in FIG. 11, the first plate material 210 has a spacer portion 214. The spacer part 214 has a corner part 211. Further, when the spacer jig 200 is rotated at the center of the handle 270, the spacer jig 200 protrudes to the left from the corner portion 211 so as to correspond to the shape of the steel sheet lamination unit on the region overlapping the rotation locus. It is formed continuously.

Embodiment 1 of iron core assembly
Hereinafter, in the embodiment of the present invention, a method of using the spacer jig 100 will be described based on the shape of the silicon steel plate shown in FIG. 6, but the shape of the silicon steel plate is not limited to this.

  FIG. 12 is a view showing a method of inserting the spacer jig into the second steel plate lamination unit. As shown in FIG. 12A, first, the corner portion 111 of the spacer portion of the spacer jig 100 a that becomes the left hand of the spacer jig 100 is inserted into the second steel plate lamination unit 13. Since the corner portion 111 inserted at this time is formed to be a slight protrusion, the insertion portion has high rigidity and can be inserted without bending. Next, as shown to (B)-(E), the spacer jig | tool 100a is rotated with respect to the 2nd steel plate lamination | stacking unit 13, and is moved to the vicinity of the insertion start point 16. FIG. Then, the tip of the spacer 114 is disposed in the vicinity of the insertion start point 16, and a gap between the silicon steel plates 43 q adjacent in the vicinity of the insertion start point 16 can be secured. In general, when the iron cores are combined, there are other parts 30 around the iron cores. Therefore, in the embodiment of the present invention, the inner peripheral side cutting portion 17 is not the outer peripheral side cutting portion 18 in the figure. The example which inserts the spacer jig | tool 100a from the vicinity was shown.

  FIG. 13 is a view showing a method of inserting the spacer jig into the first steel plate lamination unit. As shown in FIG. 13A, first, the corner portion 211 of the spacer portion of the spacer jig 200 a that becomes the left hand of the spacer jig 200 is inserted into the first steel plate lamination unit 12. Since the corner portion 211 to be inserted at this time is formed to be a slight protruding portion, the corner portion 211 has high rigidity and can be inserted without bending during insertion. Next, as shown in FIG. 13B, the spacer jig 200 a is rotated with respect to the first steel plate lamination unit 12. Then, the tip of the spacer 214 is disposed in the vicinity of the insertion start point 16, and a gap between the silicon steel plates 41 q adjacent in the vicinity of the insertion start point 16 can be secured. In the embodiment of the present invention, the spacer jig is rotated and inserted into the steel sheet stacking unit. However, the spacer jig may be inserted by relatively moving without rotating.

  FIG. 14 is a view showing the arrangement of the spacer jig when the first steel plate lamination unit and the second steel plate lamination unit start to be inserted into each other. As shown in FIG. 14, spacer jigs 200 a and 200 b are inserted into the first steel plate lamination unit 12. A spacer jig 100a is inserted into the second steel plate lamination unit 13, and a spacer jig 100b is inserted into the second steel plate lamination unit 14. The spacer jigs 100a and 100b and the spacer jigs 200a and 200b are symmetrical with each other. The spacer jigs 100a, 100b and the spacer jigs 200a, 200b do not have the same shape because the applied steel plate lamination units and arrangement are different. In the vicinity of the insertion start point 16, spacer jigs 100a and 100b and 200a and 200b are arranged. By arranging in this way, in the steel plate lamination unit in the vicinity of the insertion start point 16, the gaps formed between the adjacent silicon steel plates 41q and 43q can be made uniform. Thereby, the steel plate lamination units can be inserted into each other.

  FIG. 15 is a view showing a method of inserting and assembling steel plate lamination units into which spacer jigs are inserted. As shown in FIG. 15 (A), first, the first steel plate lamination unit 12 and the second steel plate lamination unit 13 are relatively moved to bring the insertion start points 16 closer to each other. Next, as shown in FIG. 15 (B), the protruding portions of the first steel plate lamination unit 12 and the second steel plate lamination unit 13 in the vicinity of the insertion start point 16 are combined so as to sandwich each other. At this time, the 1st steel plate lamination unit 12 and the 2nd steel plate lamination unit 13 are combined until the spacer jig | tool 100a and the spacer jig | tool 200a contact | connect. Next, as shown in FIG. 15C, the spacer jig 200a is removed from the first steel plate lamination unit 12, and the spacer jig 100a is removed from the second steel plate lamination unit 13, respectively. Then, the 1st steel plate lamination unit 12 and the 2nd steel plate lamination unit 13 are further combined, and as shown in FIG.15 (D), it combines so that a junction part may correspond.

  As described above, by combining and joining the block-shaped steel plate lamination units using a spacer jig, workability can be improved, and an iron core can be manufactured in a short time. . In the above-described embodiment, the case where both the spacer jig 100 and the spacer jig 200 are used has been shown. However, as a modification of the embodiment of the present invention, only one of the spacer jig 100 or 200 is used. It is possible that In this case, in the steel sheet laminating unit using a spacer jig, a gap is ensured in the gap formed between the adjacent overhang portions, so one or two or three magnetic steel plates can be easily inserted into the gap. It becomes possible to do.

Embodiment 3 of spacer jig
16 and 17 are top views showing the spacer jig and the usage method according to the embodiment of the present invention. The spacer jigs 300 and 400 have the same configuration as the above-described spacer jigs 100 and 200, although the shapes of the components are different. As shown in FIG. 16, the spacer jig 300 has a spacer portion 314. The spacer portion 314 has a corner portion 311. The corner portion 311 is formed outside the region located on the side where the spacer portion 314 is formed and sandwiched between the extension lines on both side surfaces at the end portion of the second plate-like material. A spacer portion 314 formed so as to continuously protrude from the corner portion 311 is formed so as to extend in the extension line direction. As shown in FIG. 17, the spacer jig 400 has a spacer portion 414. The spacer part 414 has a corner part 411. The corner portion 411 is formed outside the region sandwiched between the extension lines on both side surfaces at the end portion of the second plate-like material located on the side where the spacer portion 414 is formed. A spacer portion 414 formed so as to continuously protrude from the corner portion 411 is formed so as to extend in the extension line direction.

Embodiment 2 of iron core assembly
As shown in FIG. 16, first, the corner 311 of the spacer jig 300 is inserted into the first steel plate lamination unit. Next, the spacer jig 300 is rotated and moved along the cutting portion of the first steel plate lamination unit while the spacer portion 314 is inserted into the first steel plate lamination unit. In the outer peripheral side cut portion of the first steel plate lamination unit, the longitudinal direction of the spacer portion 314 of the spacer jig 300 is arranged to be perpendicular to the longitudinal direction of the first steel plate lamination unit. As for the second steel plate lamination unit, as shown in FIG. 17, first, the corner portion 411 of the spacer jig 400 is inserted into the second steel plate lamination unit. Next, the spacer jig 400 is rotated to insert the spacer portion 414 into the second steel plate lamination unit. In the outer peripheral side cut portion of the second steel plate lamination unit, the longitudinal direction of the spacer portion 414 of the spacer jig 400 is arranged to be horizontal with respect to the longitudinal direction of the second steel plate lamination unit.

  FIG. 18 is a diagram illustrating a method of inserting and assembling steel plate lamination units into which spacer jigs are inserted. As shown in FIG. 18A, the longitudinal direction of the second steel plate lamination unit 14 in which the spacer jig 400 is inserted is perpendicular to the longitudinal direction of the first steel plate lamination unit 12 in which the spacer jig 300 is inserted. Move relatively so as to approach each other. Before the first steel plate lamination unit 12 and the second steel plate lamination unit 14 come into contact with each other at the insertion start point 16, the spacer jigs 300 and 400 first come into contact with each other. At this time, the corner 311 of the spacer jig 300 first contacts the spacer jig 400. Since the corner portion 311 is formed to be a slight protrusion, the corner portion 311 has high rigidity during insertion and can be inserted without bending. As shown in FIG. 18B, when the first steel plate lamination unit 12 and the second steel plate lamination unit 14 start to contact at the insertion start point 16, the spacer jigs 300 and 400 are hatched regions in the figure. , The spacer portions are combined so that they are sandwiched. Further, when the first steel plate lamination unit 12 and the second steel plate lamination unit 14 are brought closer to each other, as shown in FIG. 18C, the overhanging portion of the first steel plate lamination unit and the overhanging portion of the second steel plate lamination unit are sandwiched with each other. To be combined. Next, the spacer jig 300 is removed from the first steel plate lamination unit 12, and the spacer jig 400 is removed from the second steel plate lamination unit 14. Thereafter, as shown in FIG. 18D, the first steel plate stacking unit 12 and the second steel plate stacking unit 14 are further combined and combined so that the joints coincide. As described above, by using the spacer jigs 300 and 400, the stacked units on the blocks stacked to a certain height can be easily combined.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which shows the iron core structure of a transformer. FIG. 2 is a diagram illustrating a half of the iron core in FIG. 1 when viewed in plan. It is a figure which expands and shows the position enclosed with the dashed-two dotted line III in FIG. It is a side view of the lamination | stacking unit which laminated | stacked the several silicon steel plate and. It is the figure which showed the shape of the silicon steel plate which comprises a general iron core. It is the figure which showed the shape of the silicon steel plate which comprises an iron core. It is a side view of the spacer jig which concerns on embodiment of this invention. It is a top view of the spacer jig | tool which concerns on the same embodiment. It is sectional drawing of the spacer jig | tool along the IX-IX line in FIG. (A) is a top view of the first plate material, (B) is a top view of the second plate material, and (C) is a top view of a state in which the first plate material and the second plate material are laminated. It is a thing. It is a top view which shows the structure of the spacer jig | tool which concerns on embodiment of this invention. It is the figure which showed the method of inserting a spacer jig | tool in a 2nd steel plate lamination | stacking unit. It is the figure which showed the method of inserting a spacer jig | tool into a 1st steel plate lamination | stacking unit. It is the figure which showed arrangement | positioning of the spacer jig | tool at the time of starting insertion of a 1st steel plate lamination unit and a 2nd steel plate lamination unit mutually. It is a figure which shows the method of inserting and combining the steel plate lamination | stacking unit which inserted the spacer jig | tool mutually. It is the top view which showed the spacer jig and usage method based on embodiment of this invention. It is the top view which showed the spacer jig and usage method based on the embodiment. It is a figure which shows the method of inserting and combining the steel plate lamination | stacking unit which inserted the spacer jig | tool mutually.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Transformer, 11, 12 York iron core (1st steel plate lamination unit), 13, 14 Leg iron core (2nd steel plate lamination unit), 15 Iron core, 16 Insertion start point, 17 Inner peripheral side cutting part, 18 Outer peripheral side cutting part , 19 Insertion line, 21 Coil, 30 parts, 41, 41p, 41q, 43, 43p, 43q Silicon steel plate, 100, 100a, 100b, 200, 200a, 200b, 300, 400 Spacer jig, 110, 210 First plate Material, 111, 211, 311, 411 Corner, 112 Another corner, 113, 123 Notch, 114, 214, 314, 414 Spacer, 120 Second plate material, 121 Projection, 122 Root , 130 Bottom plate, 131,231 U-shaped part, 140, 240 Reference block, 150, 250 Top plate, 160, 260 Presser foot , 170, 270 handle.

Claims (6)

One steel plate lamination unit formed by repeatedly laminating the first and second magnetic steel plates so that the second magnetic steel plate protrudes from the end surface of the first magnetic steel plate to form an overhanging portion serving as a joint. Spacer jig used when assembling an iron core by sandwiching and joining the overhanging portion of the one steel plate lamination unit and the overhanging portion of the other steel plate lamination unit. Because
A first plate-like material having a spacer portion;
A second plate-like material laminated on the first plate-like material in a region other than the spacer portion;
The spacer portion is arranged in the gap so as to secure a gap between the second magnetic steel plates stacked adjacent to each other with the first magnetic steel plate interposed therebetween in the one steel plate lamination unit. And, at the time of insertion, has a corner that becomes an insertion start end into the gap,
The second plate-like material is disposed corresponding to the position where the second magnetic steel plate is laminated in the one steel plate lamination unit, and the spacer portion of the first plate-like material is continuous from the corner portion. And overlaid with the first plate material in a region other than the spacer portion ,
When inserting the spacer jig into the one steel sheet lamination unit, the spacer jig is rotated and inserted, and corresponds to the shape of the steel sheet lamination unit on the region overlapping the rotation locus. Thus , the spacer jig | tool in which the said spacer part of the said 1st plate-shaped material is continuously formed from the said corner | angular part . The have another corner to the maximum turning radius with a position of said spacer portion in rotation locus, the corners of said further is inserted into the deepest position from the open end of the gap, in claim 1 The spacer jig described. The corner is formed outside the region located on the side where the spacer portion is formed and sandwiched between the extension lines on both side surfaces at the end of the second plate-like material,
The spacer jig according to claim 2 , wherein the spacer portion is formed to extend in the extension line direction. A top plate placed above the laminated first plate material and the second plate material;
The first plate-shaped material and the second plate-shaped material are disposed below the first plate-shaped material and the second plate-shaped material, and a part of the first plate-shaped material is formed in a substantially U-shape. A plate material and a bottom plate on which the top plate is placed;
A screw connecting the top plate and the bottom plate;
Wherein provided on the top plate further comprises a pressing screw pressing said first sheet material and second sheet material to said bottom plate, the spacer jig according to any one of claims 1 to 3. The spacer jig according to claim 4 , wherein a handle is provided above the top plate. One steel plate lamination unit formed by repeatedly laminating the first and second magnetic steel plates so that the second magnetic steel plate protrudes from the end surface of the first magnetic steel plate to form an overhanging portion serving as a joint. Spacer jig used when assembling an iron core by sandwiching and joining the overhanging portion of the one steel plate lamination unit and the overhanging portion of the other steel plate lamination unit. A first plate-like material having a spacer portion and a second plate-like material laminated in an area other than the spacer portion so as to overlap the first plate-like material, In one steel plate lamination unit, the gap is formed in the gap so as to secure a gap formed between the second magnetic steel plates stacked adjacent to each other with the first magnetic steel plate interposed therebetween. Both have corners that become insertion start ends into the gap during the insertion, and the second plate-like material corresponds to the position where the second magnetic steel plate is laminated in the one steel plate lamination unit. And the first plate-like material is stacked and overlapped with the first plate-like material in a region other than the spacer portion so that the spacer portion of the first plate-like material continuously protrudes from the corner portion. using spacer jig, a first steel plate laminate unit corresponding to the previous SL single steel laminate unit, by joining the second steel plate stacked units to each other, a method of manufacturing a core,
Inserting the insertion start end of the spacer portion into the first steel plate lamination unit;
Moving the spacer jig relative to the first steel plate lamination unit, and inserting the spacer portion into the first steel plate lamination unit;
With the spacer jig inserted into the first steel plate stacking unit, the first steel plate stacking unit and the second steel plate stacking unit are moved relative to each other so that the ends of the projecting portions are mutually connected. A step of laminating;
Removing the spacer jig from the first steel plate lamination unit;
A step of relatively moving the first steel plate lamination unit and the second steel plate lamination unit and laminating so that regions corresponding to each other of the overhanging portions overlap each other ,
The method of manufacturing an iron core , wherein the spacer jig is rotated and inserted in the step of inserting the spacer portion into the first steel plate lamination unit .

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