Core protection case, amorphous core molded transformer, and manufacturing method thereof

Abstract

To provide: an iron core protection case capable of protecting an amorphous iron core without causing deformation during lifting or without damaging the amorphous iron core; an amorphous iron core transformer; and a manufacturing method thereof.SOLUTION: A core protection case is intended for covering a wound core. The core protection case is composed of: a first portion having a tip portion covering one of both ends of lap portion of the wound core to be lap-jointed; a second portion having a tip portion covering the other of both ends of the lap portion; and a third portion connecting the first portion and the second portion. Therein: each tip portion of the first portion and the second portion opposite to the third portion is formed of a first surface which is an outer side surface of the core protection case and a second surface which extends at a predetermined angle with respect to the first surface; and a hole is provided in the second surface for attaching a hanging jig which is connected to the lap portion.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a core protection case, an amorphous core molded transformer, and a method for manufacturing the same. [Background technology]

[0002] Patent Document 1 discloses "an amorphous core molded transformer comprising a coil and an iron core made of amorphous material, the iron core being fitted with an iron core protective case, the iron core protective case having an upper piece with a hole formed therein." [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-75765 A Summary of the Invention [Problem to be solved by the invention]

[0004] The amorphous core material itself is thin, and the core made by laminating amorphous material does not have enough rigidity to stand on its own. For this reason, conventionally, amorphous core molded transformers are held in place by inserting the core from above a highly rigid coil molded with resin, and then hanging the core on the coil. However, with this assembly method, the wrap of the core is located below the coil, and it is necessary to lay the coil and core horizontally before closing the wrap. For this reason, the assembly process requires a device to flip the core with the coil inserted.

[0005] In Patent Document 1, a U-shaped core protection case that is also U-shaped in cross section is attached along the U-shaped amorphous wound core before wrapping, so that the amorphous wound core can stand on its own with the wrap part facing up, and a coil can be inserted from above and the wrap part closed at the top, eliminating the need to flip the core with the coil inserted.

[0006] However, while the upper piece of the U-shaped outer side of the core protection case in Patent Document 1 has a hanging hole for standing up and moving while in the upright state, if the upper pieces of the U-shaped outer side are lifted up by the hanging holes that are far apart, movement in the upright state is unstable, and there is a risk of the core protection case being deformed due to bending or twisting, etc.

[0007] An object of the present invention is to provide an iron core protection case that is capable of protecting an amorphous iron core without causing deformation when lifted and without damaging the amorphous iron core, an amorphous iron core transformer, and a manufacturing method thereof. [Means for solving the problem]

[0008] The core protection case of the present invention is an iron core protection case that is placed over a wound core, and is composed of a first portion having a tip portion covering one end of both ends of the lap portion of the wound core to be lap joined, a second portion having a tip portion covering the other end of both ends, and a third portion connecting the first portion and the second portion, and each tip portion of the first portion and the second portion opposite the third portion is formed by a first surface which is the outer side surface of the core protection case and a second surface extending at a predetermined angle to the first surface, and a hole is provided in the second surface for attaching a hanging jig that is connected to the lap portion. Effect of the Invention

[0009] According to the present invention, the amorphous core can be protected without being damaged and without deformation during lifting. Problems, configurations and effects other than those described above will become apparent from the following description of the preferred embodiment of the present invention. [Brief description of the drawings]

[0010] [Figure 1] Overall view of the core protection case in this embodiment [Diagram 2]FIG. 1 is an explanatory diagram of an amorphous core, a core protection case, and a wrap cover before installation in this embodiment. [Diagram 3] FIG. 1 is an explanatory diagram of the amorphous core and insulating plate after the core protection case and wrap portion cover are attached in this embodiment. [Figure 4] A diagram showing the inversion of the amorphous core after the core protection case and wrap cover are attached in this embodiment. [Diagram 5] An explanatory diagram of the amorphous core and the lap section dedicated hanging jig after the core protection case and lap section cover are attached in this embodiment. [Figure 6] A diagram of the amorphous core being lifted horizontally after the core protection case and wrap cover are attached in this embodiment. [Figure 7] The amorphous core stands on its own after the core protection case and wrap cover are attached in this embodiment, and the jig is attached to make the wrap stand upright when inserting the coil. [Figure 8] A diagram showing the process of inserting a coil into the amorphous core after the core protection case and wrap cover are attached in this embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the amorphous core molded transformer and its manufacturing method according to the present invention will be described with reference to the drawings.

[0012] Fig. 1 is a diagram showing the core protection case 3 before assembly in this embodiment. As shown in Fig. 1, the core protection case 3 is provided with a round hole 31 through which a bolt for attaching the lap portion dedicated hanging jig 7 is passed, a hanging hole 32 for hanging the third portion 3c side of the core protection case 3 in order to attach the lap portion dedicated hanging jig 7 and move it to a predetermined assembly position, an extension portion 33 that is a portion longer than the lower surface of the amorphous core 2 that is a wound core that is laid down when attached to the core protection case 3, and a reinforcing stay 34 for preventing the amorphous core 2 from opening outward together with the core protection case 3 due to its own weight in a vertical state in which the lap portion 21 to be lap-jointed is positioned above the third portion 3c.

[0013] The core protection case 3 is a case having a U-shape surrounded on three sides by a first portion 3a forming a first side, a second portion 3b forming a second side parallel to the first side, and a third portion 3c connecting an end of the first portion 3a and an end of the second portion 3b facing the first portion 3a. A tip E1, which is the end of the first portion 3a that is not connected to the third portion 3c, and a tip E2, which is the end of the second portion 3b that is not connected to the third portion 3c, are spaced apart from each other, forming an open region R in the U-shape.

[0014] The first portion 3a has a first surface 30a forming the outer side surface of the core protection case 3, an inner side surface 30b of the core protection case 3, and a second surface 30c connecting the first surface 30a and the inner side surface 30b, and is surrounded on three sides by these surfaces, forming a so-called U-shape in katakana. The second portion 3b and the third portion 3c are also formed in a U-shape similar to the first portion 3a. In other words, each of the first portion 3a, the second portion 3b, and the third portion 3c is formed by the first surface 30a and the inner side surface 30b parallel to the covering direction in which the amorphous core 2 is covered with the core protection case 3, and the second surface 30c perpendicular to the covering direction (horizontal in a sideways state described later). The U-shape is formed by the open side being below the covering direction, and the amorphous core 2 is covered and protected. In FIG. 1, the orientation of these surfaces is indicated by dotted lines.

[0015] The iron core protection case 3 has hanging holes 32 at both ends in the longitudinal direction of the third portion 3c. Specifically, the hanging holes 32 are provided in two places on the first surface 30a at both ends in the connecting direction connecting the first portion 3a and the second portion 3b in the third portion 3c, and are provided on a surface different from the second surface 30c in which the round hole 31 of the iron core protection case 3 is provided. As described later, the hanging holes 32 are configured as holes that are used both to hang up the third portion 3c side for attaching the lap portion dedicated hanging jig 7 and to hang up the iron core protection case 3 in a sideways state by the hanging holes 72 of the lap portion dedicated hanging jig 7. The hanging holes 32 allow the third portion 3c side of the iron core protection case 3 to be hung, and the iron core protection case 3 can be easily turned upside down in a vertical state with the hanging holes 32 facing upward.

[0016] The first portion 3a and the second portion 3b of the core protection case 3 have tip portions 23a, 23b (FIG. 2) formed by the first surface 30a and the second surface 30c at the tip portion opposite the third portion 3c side. The second surface 30c is a surface extending from the first surface 30a at a predetermined angle (90 degrees in this example). The tip portions 23a, 23b have notches 24a, 24b of a length according to the width of the lap portion 21 to be lap-joined. The notches 24a, 24b can be formed by making the length of the inner side surface 30b of the first portion 3a and the second portion 3b in the longitudinal direction (the direction perpendicular to the above-mentioned connecting direction) shorter than that of the first surface 30a and the second surface 30c. Both ends of the wrap portion 21 fit into the cutout portions 24a, 24b, so that the tip portions 23a, 23b can cover both ends of the wrap portion 21.

[0017] The round hole 31 for attaching the lap portion dedicated hanging jig 7 is provided on the tip side of the second surface 30c of the tip portions 23a, 23b, and at a position outside the center of the second surface 30c (for example, at the position that is the boundary with the first surface 30a). Because the round hole 31 is provided on the tip side of the second surface 30c and at a position outside the center, the lap portion 21 of the amorphous core 2 and the round hole 31 of the core protection case 3 do not overlap, and the lap portion dedicated hanging jig 7 can be easily attached to the core protection case 3.

[0018] As described above, the core protection case 3 in this embodiment is composed of a first portion 3a having a tip portion 23a covering one end of both ends of the wrap portion 21 of the amorphous core 2, a second portion 3b having a tip portion 23b covering the other end of both ends, and a third portion 3c connecting the first portion 3a and the second portion 3b. Each tip portion of the first portion 3a and the second portion 3b opposite the third portion 3c is formed by a first surface 30a, which is the outer side surface of the core protection case 3, and a second surface 30c extending from the first surface at a predetermined angle (90 degrees in this example), and a round hole 31 is provided in the second surface 30c for attaching a wrap portion-specific hanging jig 7 that is connected to the wrap portion 21.

[0019] FIG. 2 is an explanatory diagram of the amorphous core and the core protection case before assembly in this embodiment. The work of attaching the core protection case 3 to the amorphous core 2 in this embodiment will be described. First, as shown in FIG. 2, the heat-treated amorphous core 2 is placed on the splint 5 in a horizontal state. At this time, the splint 5 is placed to avoid the extension 33 of the core protection case 3. The extension 33 is a convex portion formed on the first portion 3a, the second portion 3b, and the third portion 3c of the core protection case 3, protruding in the above-mentioned covering direction. In other words, the core protection case 3 attached to the heat-treated amorphous core 2 in a horizontal state has a thickness that surrounds the underside of the amorphous core 2 in the above-mentioned covering direction in the portion where the splint 5 supporting the amorphous core 2 is placed. On the other hand, in the portion where the splint 5 is not placed, it has an additional thickness in the above-mentioned covering direction by a predetermined width considering the weight of the core underside of the portion where the splint 5 is placed.

[0020] Such a convex shape protects the entire amorphous core 2 including the portion where deflection occurs due to the amorphous core 2's own weight up to the underside in the covering direction, so that the amorphous core 2 can be placed in a stable position while being covered so as not to protrude from the core protection case 3 due to deflection due to its own weight. As shown in Fig. 2, the extensions 33 are formed on the first surface 30a and the inner side surface 30b of each of the first portion 3a, the second portion 3b, and the third portion 3c. The core protection case 3 is attached to the amorphous core 2 so that the tip E1 of the first portion 3a and the tip E2 of the second portion 3b are on the lap portion 21 side of the amorphous core 2.

[0021] For insulation and protection, the amorphous core 2 is wrapped in insulating paper up to the insulator wrapping boundary line 22, except for the wrap portion 21 of the amorphous core 2. The amorphous core 2 is placed on a splint 5, (1) first the wrap portion 21 is covered with the wrap portion cover 4, and then (2) the core protection case 3 is placed on the amorphous core 2. Then (3) the wrap portion 21 together with the wrap portion cover 4 is wrapped multiple times with tape or band having sufficient tensile strength to secure it.

[0022] Next, (4) as shown in Figure 3, an insulating plate 6 is inserted between the splints 5 into the extension 33 of the core protection case 3 from the lower side, which is the opposite direction to the above-mentioned covering direction, and placed on the lower side of the amorphous core 2 placed on the splint 5, not in contact with the splint 5. The number of insulating plates 6 varies depending on the dimensions of the amorphous core 2. Then, (5) the part of the amorphous core 2 with the insulating plate 6 placed on it is fixed together with the core protection case 3 by wrapping it several times with tape or band with sufficient tensile strength.

[0023] Furthermore, in order to attach the lap portion dedicated hanging jig 7, (6) as shown in Fig. 4, an inversion device (not shown) passes a wire through the hanging hole 32 of the core protection case 3 fixed by the procedure up to (5) above, hoists it up vertically at 90 degrees so that the hanging hole 32 side faces upward, and then rotates it horizontally 180 degrees with a lifting device such as a crane. Then, (7) the inversion device again suspends the rotated core protection case 3, returning it to the sideways position as shown in Fig. 5, with the front and back different from the state shown in Fig. 3.

[0024] 5, the lap portion dedicated hanging jig 7 is attached to the amorphous core 2 together with the lap portion cover 4 from the lap portion 21 side of the amorphous core 2. When attaching, the round holes 31 on the tip side of the tips 23a, 23b of the core protection case 3 are aligned with the bolt holes 71 of the lap portion dedicated hanging jig 7, and they are physically fixed in place with bolts and nuts, and the lap portion dedicated hanging jig 7 is attached to the core protection case 3.

[0025] (9) When moving the amorphous core 2 with the core protection case 3 attached to the specified assembly position, it is hung with wires at four locations in total: the two hanging holes 32 of the core protection case 3 and the two hanging holes 72 of the lap section dedicated hanging jig in a laid-down position, as shown in Fig. 6. In this way, the hanging holes 32 are also used for the hanging in the above (6) and (9), so the number of holes in the core protection case 3 can be reduced, making it possible to hang the core 2 while maintaining a certain level of strength.

[0026] As shown in Fig. 6, the lap portion dedicated hanging jig 7 attached to the lap portion 21 of the amorphous core 2 forms a fourth portion 3d parallel to the third portion 3c of the core protection case 3, and the open region R formed by the tip E1 of the first portion 3a and the tip E2 of the first portion 3b is closed, forming a new core protection case in a square shape. As a result, the hanging hole 32 and the hanging hole 72 of the lap portion dedicated hanging jig 7 are positioned on the diagonal of the new core protection case 3. In the new core protection case in a square shape, the lap portion dedicated hanging jig 7 is connected to the lap portion 21 by a bolt inserted into the round hole 31 aligned with the bolt hole 71, and the amorphous core 2 including the lap portion 21 can be covered.

[0027] The hanging holes 72 are holes provided for moving the new core protection case 3 to a predetermined assembly position and for lifting the lap portion 21 after it has been moved to the predetermined assembly position. The lap portion dedicated hanging jig 7 is physically fixed to the core protection case 3, thereby forming the above-mentioned square-shaped outer side surface 7a of the new core protection case. As a result, the hanging holes 32 are provided at positions facing the hanging holes 72 provided at both ends of the outer side surface 7a of the attached lap portion dedicated hanging jig 7 in the connecting direction. Therefore, a wire can be passed through the hanging hole 72 of the attached lap portion dedicated hanging jig 7 and the hanging hole 32 of the core protection case 3, and the core protection case 3 can be lifted horizontally in a well-balanced manner in a sideways position. The new core protection case 3 with the wrap portion-specific hanging jig 7 attached covers the outer side of the amorphous core 2, including the wrap portion 21, with the first surfaces 30a of the first portion 3a, the second portion 3b, and the third portion 3c, and the outer side surface 7a of the fourth portion 3d.

[0028] 6 shows the amorphous core 2 with the core protection case 3 attached in a horizontal position. In this example, due to the arrangement of the hanging holes 72 and 32 formed at the four diagonal corners of the new core protection case 3 to which the lap section dedicated hanging jig 7 is attached, when moving to the specified assembly position, the amorphous core 2 covered by the core protection case 3 can be lifted in a horizontal position by passing wires through the four hanging holes 32 and 72. As a result, the core protection case 3 can be moved more stably than when hung at two points in a vertical position, and without causing unnecessary bending or twisting.

[0029] Next, a manufacturing method of an amorphous core molded transformer will be described. (11) First, the wrap portion dedicated lifting jig 7 shown in Fig. 6 is lifted with a wire using only two lifting holes 72, and placed in a vertical position such that the wrap portion 21 is located above the third portion 3c. At this time, the reinforcing stay 34 prevents the amorphous core 2 from opening outward together with the core protection case 3 due to its own weight. The reinforcing stay 34 is formed with a curve that follows the R portion (bent portion) on the outer layer side of the amorphous core 2. The bent portions are both ends in the connecting direction of the bottom surface formed by the amorphous core 2 in the vertical position covered by the core protection case 3.

[0030] In this way, the reinforcing stay 34 is provided at the connecting portion between the first portion 3a and the third portion 3c and at the connecting portion between the second portion 3b and the third portion 3c, the reinforcing stay 34 being shaped to match the shape of the R portion formed on the outer layer side of the amorphous core 2. In FIG. 7, the reinforcing stay 34 is provided at the corner C formed by the first surface 30a of the first portion 3a and the second portion 3b and the first surface 30a of the third portion 3c. The reinforcing stay 34 can prevent the amorphous core 2 from falling into the corner C of the core protection case 3 due to its own weight. In addition, since the reinforcing stay 34 can prevent the amorphous core 2 from falling into the corner C due to its own weight, even if it becomes necessary to turn the amorphous core 2 vertically at 90 degrees so that the hanging hole 32 faces upward, the wire can be easily passed through the hanging hole 32 that is not blocked by the amorphous core 2. In addition, since the reinforcing stay 34 is curved to fit the bent portion, the amorphous core 2 is less likely to be folded, and damage to the amorphous core 2 can be prevented.

[0031] Then, (12) as shown in FIG. 7, the lap portion-specific hanging jig 7 connected to the lap portion 21 is removed from the new core protection case 3 described above to open the lap portion 21, and a jig 8 for holding the lap portion 21 upright is placed over the top of the tip side of the opened lap portion 21, and then the lap portion cover 4 is temporarily removed.

[0032] 8, (13) the molded coil 1 to be wound around the amorphous core 2 is inserted from above the wrap portion 21 covered with the jig 8. After that, (14) the wrap portion cover 4 is attached again, the jig 8 that holds the wrap portion 21 upright is removed, and the wrap portion 21 of the amorphous core 2 is closed.

[0033] In this way, the core protection case 3 is placed over the amorphous core 2 except for the lap portion 21, the lap portion dedicated hanging jig 7 is placed over the lap portion 21, and the round hole 31 is aligned with the bolt hole 71 of the lap portion dedicated hanging jig 7 to form a new core protection case 3 in which the lap portion dedicated hanging jig 7 is fixed. Then, the new protection case is lifted up by the hanging hole 72 provided in the lap portion dedicated hanging jig 7 to a vertical position in which the lap portion 21 is positioned above the third portion 3c.

[0034] Specifically, first, a wire is passed through the hanging holes 32 provided at both ends of the first surface 30a of the third portion 3c in the direction connecting the first portion 3a and the second portion 3b, and the iron core protection case 3 covering the amorphous iron core 2 is laid down on its side by being lifted up and lowered. Then, the lap portion dedicated hanging jig 7 is attached to the iron core protection case 3 with bolts inserted into round holes 31 aligned with bolt holes 71 provided at both ends of the lap portion dedicated hanging jig 7 in the connecting direction. Furthermore, a wire is attached to the hanging holes 72 provided at both ends of the outer side surface 7a of the attached lap portion dedicated hanging jig 7 in the connecting direction, and it is lifted up vertically with the lap portion 21 facing upward.

[0035] Then, the lap portion dedicated hanging jig 7 is removed to open the lap portion 21, and then the molded coil 1 to be wound is inserted from above, that is, the tip side of the opened lap portion 21, onto the amorphous core 2 with the opened lap portion 21, and the lap portion 21 is closed by the lap portion cover 4.

[0036] As described above, according to this embodiment, when manufacturing an amorphous core molded transformer, the core protective case allows the amorphous core to stand on its own with the wrap portion located at the top, making it possible to wrap the top. This eliminates the need for a large-scale reversing machine, and significantly reduces the number of steps required to manufacture an amorphous core molded transformer. In addition, even for delivery destinations where the transformer body cannot be delivered, it becomes easy to deliver the core and coil disassembled and assembled on-site.

[0037] Specifically, as described with reference to FIG. 1-4 and the like, in an iron core protection case (iron core protection case 3) that is placed on a wound iron core (amorphous iron core 2), the iron core protection case includes a first portion (first portion 3a) having a tip portion (tip portion 23a) that covers one end of both ends of a lap portion (lap portion 21) of the wound iron core that is lap-jointed, a second portion (second portion 3b) having a tip portion (tip portion 23b) that covers the other end of the both ends, and a third portion (second portion 3b) that connects the first portion and the second portion. The first and second parts of the iron core protection case 3 are formed of a first surface (first surface 30a) which is the outer side surface of the iron core protection case 3, and a second surface (second surface 30c) which extends from the first surface at a predetermined angle (for example, 90 degrees). The second surface is provided with a hole (round hole 31) for attaching a hoisting jig (hoisting jig 7 dedicated to the lap part) which is connected to the lap part. With this configuration, for example, deformation such as bending or twisting does not occur when lifting, and the amorphous core 2 can be protected without being damaged. In addition, since the round hole 31 is provided on the second surface 30c, the position of the hole can be confirmed when the iron core protection case 3 is placed over the amorphous core 2, and the hoisting jig 7 dedicated to the lap part can be easily attached.

[0038] Moreover, the holes are provided on the first surface side rather than the center of the second surface 30c of each of the tip portions. With this configuration, for example, there is no risk of the round hole 31 being blocked by the lap portion 21, and the lap portion dedicated hanging jig 7 can be easily attached to the core protection case 3.

[0039] The core protection case is attached to the hanging jig by bolts inserted into holes aligned with bolt holes (bolt holes 71) provided at both ends of the hanging jig in the connecting direction. With this configuration, for example, the lap portion dedicated hanging jig 7 is connected to the lap portion 21, and a new square-shaped core protection case 3 that covers the amorphous core 2 including the lap portion 21 can be formed.

[0040] Furthermore, the core protection case is provided with hanging holes (hanging holes 32) for hanging up the third portion side of the core protection case at both ends in the connecting direction of the first surface of the third portion. With this configuration, for example, the third portion 3c side of the core protection case 3 can be lifted, and it becomes easy to turn the core protection case upside down in a vertical state with the hanging holes 32 facing upward.

[0041] The hanging holes are provided at positions facing the hanging jig hanging holes for lifting the lap portion provided at both ends of the outer side surface of the hanging jig in the connecting direction. With this configuration, for example, a wire can be passed through the hanging hole 72 of the attached lap portion dedicated hanging jig 7 and the hanging hole 32 of the core protection case 3, and the core protection case 3 can be lifted horizontally in a well-balanced manner in a laid-down state.

[0042] The hanging hole is used for both hanging the third portion side for attaching the hanging jig and for hanging the core protection case in a sideways position using the hanging jig hanging hole. With this configuration, for example, the number of holes in the core protection case 3 can be reduced, making it possible to hang the core protection case 3 while maintaining a certain level of strength.

[0043] Furthermore, the core protection case is provided with reinforcing stays (reinforcing stays 34) for reinforcing the shape of the wound core at a corner (corner C) formed by the first surface of the first portion and the first surface of the third portion, and at a corner (corner C) formed by the first surface of the second portion and the first surface of the third portion. With this configuration, for example, it is possible to prevent the amorphous core 2 from falling into the corner C of the core protection case 3 due to its own weight, and it is also possible to easily pass a wire through the hanging hole 32.

[0044] The reinforcing stays are shaped to fit the bent portions (R portions) that are the outer layer portions of both ends of the bottom edge formed by the wound core covered by the core protection case with the third portion side lifted up. With this configuration, for example, creases are less likely to be formed at the bent portions (R portions), and damage to the amorphous core 2 can be prevented.

[0045] The present invention is not limited to the above-described embodiments as they are, and in the implementation stage, the components can be modified and embodied within the scope of the gist of the present invention, or multiple components disclosed in the above-described embodiments can be appropriately combined. [Explanation of symbols]

[0046] 1 Molded coil 2 Amorphous iron core 21 Amorphous core wrap 22 Insulation wrapping boundary 3 Core protection case 31 Round hole for passing the bolt to attach the special hanging jig 32 Hanging hole 33 Extension 34 Reinforcement stay 4 Wrap section cover 5 Splints 6. Insulating plate 7. Hanging fixture for lap section 71 Bolt holes for special hanging fixture 72 Dedicated hanging jig hanging hole 8. Jig for holding the wrap upright when inserting the coil

Claims

1. A core protection case that is placed over a wound core, The core protection case is a first portion having a tip portion covering one end of both ends of the lap portion of the wound core to be lap-jointed, a second portion having a tip portion covering the other end of the both ends, and a third portion connecting the first portion and the second portion, Each tip portion of the first portion and the second portion on the opposite side to the third portion is The core protection case is formed by a first surface which is an outer side surface of the core protection case, and a second surface which extends from the first surface at a predetermined angle, A hole is provided on the second surface for attaching a hanging jig connected to the lap portion. An iron core protection case comprising:

2. The hole is provided on the first surface side of the second surface of each of the tip portions.

2. The core protection case according to claim 1.

3. The core protection case is The hanging jig is attached to the hanging jig by a bolt inserted into the hole aligned with the bolt hole provided at both ends of the hanging jig in the connecting direction.

2. The core protection case according to claim 1.

4. The core protection case is a lifting hole for lifting the third portion side of the core protection case is provided at both ends of the first surface of the third portion in the connecting direction; 2. The core protection case according to claim 1.

5. The hanging hole is The suspending jig is provided at a position opposite to a suspending jig suspending hole for lifting the lap portion provided at both ends of the outer side surface of the suspending jig in the connecting direction.

5. The core protection case according to claim 4.

6. The hanging hole is The hole is used for both lifting the third portion side for attaching the lifting jig and lifting the core protection case in a sideways state using the lifting jig lifting hole.

5. The core protection case according to claim 4.

7. The core protection case is a reinforcing stay is provided at a corner formed by the first surface of the first portion and the first surface of the third portion, and at a corner formed by the first surface of the second portion and the first surface of the third portion, for reinforcing a shape of the wound core; 2. The core protection case according to claim 1.

8. The reinforcing stay is The third portion has a shape that conforms to bent portions that are outer layer sides of both ends of a bottom side formed by the wound core covered by the lifted core protection case.

8. The core protection case according to claim 7.

9. 2. An amorphous core molded transformer having a coil wound around the wound core covered with the core protection case according to claim 1.

10. A method for manufacturing the amorphous core molded transformer according to claim 9, a wire is passed through a hanging hole provided at both ends of the first surface of the third portion in the connecting direction to lift and lower the third portion, thereby placing the core protection case covering the wound core in a sideways state; The hoisting jig is attached to the core protection case by bolts inserted into the holes aligned with bolt holes provided at both ends of the hoisting jig in the connecting direction; A wire is attached to the hanging jig hanging holes provided at both ends of the outer side surface of the attached hanging jig in the connecting direction, and the hanging jig is lifted up in a vertical state with the lap portion facing upward, inserting a coil to be wound around the wound core from above, which is the tip side of the lap portion from which the hanging jig has been removed; closing the lap portion with a lap portion cover; A method for manufacturing an amorphous core molded transformer comprising the steps of:

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