JP3192948B2 - Winding core manufacturing method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for manufacturing a winding block composed of a plurality of strips which are overlapped with being slightly shifted in the circumferential direction of a winding shaft while aligning a front end portion and a rear end portion of the strip material block. The present invention relates to a wound iron core manufacturing method and apparatus for manufacturing a wound iron core by winding a plurality of wound iron cores.

[0002]

2. Description of the Related Art There are various types of wound iron cores used for electric equipment such as transformers, and a one-turn cut type wound iron core is widely known as one of them. As shown in FIG. 6 (a), this type of wound iron core has a strip material block 3 composed of a plurality of strip materials 2 that are superposed with a slight displacement in the circumferential direction of the winding shaft 1 and the leading end of the strip material block. It is manufactured by winding a plurality of them around the winding shaft while aligning the rear ends. The seams of the strip blocks 3 (the portions where the front end and the rear end face each other with a gap) are usually adjusted so as to be arranged in the radial direction. A clip member for bundling the respective band material blocks is attached to this portion. The winding core 4 after winding is completed
Extracted from The wound iron core 4 (FIG. 7A) is thereafter subjected to a shaping step (FIG. 7B) and a coil mounting step (FIG. 7B).
(C) and through FIG. 7 (d)), it is incorporated in a transformer or the like. In the coil mounting step, the wound strip is once loosened and the coil 5 having a predetermined shape is inserted. After installing the coil,
The wound core 4 is returned to the original shape while the loosened strips are overlapped.

FIG. 8 shows a part of a conventional wound iron core manufacturing apparatus viewed from above. Here, a part of the transport mechanism 20 for transporting the strip 3 and the winding mechanism 10 for winding the transported strip 3 around the winding shaft 1 will be described.

The winding mechanism 10 includes a winding shaft 1, rollers 11 and 12 disposed around the winding shaft 1, and a belt 1 running while winding the transported band material block 3 around the winding shaft 1.
3 and a pressing claw 14 arranged close to the roller 11 so as not to block the transport path of the strip material block 3. The winding shaft 1 is mounted on a guide rail (not shown) extending in the direction of arrow A, and can move along the guide rail.

The transport mechanism 20 projects from the two receiving plates 21 for receiving the band blocks 3 sent from the shifting and stacking mechanism (not shown) and the two receiving plates 21 of the received band blocks 3. A roller pair (rollers 22, 23) is provided which sandwiches the portion from both sides and moves so as to send the strip material block forward. The roller pair is driven by a clamp cylinder 24 and a pushing cylinder 25. The clamp cylinder 24 can move the support shaft 22a in the direction of arrow B. The roller 22 is supported by a support shaft 22a via a one-way clutch bearing that can rotate only to the left in the drawing. The pushing cylinder 25 can move the clamp cylinder 24 in the direction of arrow C. The roller 23 moves in the arrow C direction together with the roller 22. The roller 23 is
It is supported by a support shaft 23a via a normal bearing, and can rotate in both directions.

[0006] The belt 13 is stretched over a plurality of rollers including the rollers 11 and 12. The tension of the belt 13 is always kept constant by the belt tension unit 15. The servo motor 16 drives the roller 12 to rotate, and causes the belt 13 to run in the direction of arrow D. The head of the belt tension unit 15 moves to the left in the drawing with an increase in the winding amount of the band material block of the winding shaft 1 while keeping the tension of the running belt 13 constant.
Are kept away from the rollers 11 and 12. The rotation of the winding shaft 1 is detected by the encoder 17.

Next, the transport mechanism 20 and the winding mechanism 1
The operation of 0 will be described.

When the strip 3 is inserted between the two receiving plates 21, the clamp cylinder 24 clamps the strip 3. The pushing cylinder 25 moves the clamp cylinder 24 rightward in the drawing, and pushes the leading end of the band material block 3 into the winding opening of the belt 13. The strip material block having the leading end wound around the belt 13 advances while rotating the rollers 22 and 23, and the reel 1
It is wound up. The roller 22, which does not rotate when the strip block 3 is pushed in, rotates without difficulty at this time due to the action of the one-way clutch bearing. When the winding is completed, the next band block between the two receiving plates 21 prepared during this is clamped to the clamp cylinder 24.
, And this is pushed into the winding opening by the pushing cylinder 25.

By repeating the above operation, a wound core is completed.

[0010]

However, in this conventional example, in order to wind one strip material block 3 around the winding shaft 1, the winding shaft 1 must be rotated twice. Because
Even if the winding shaft 1 is rotated once, only the winding of the band material close to the winding shaft 1 is completed, and a part of the band material far from the winding shaft 1 is present on the pushing claw 14 without being wound. This is because (see FIG. 9). In other words, in order to wind the rear end of the band material block 3 on the holding claw 14, the winding shaft 1 needs to be further rotated once from the state shown in FIG. There is. After rotating the winding shaft 1 once,
In the method of immediately inserting the next band block (band block 3a), while repeating this, the joint becomes
It shifts in the circumferential direction (see FIG. 6B). If the seams are scattered in the circumferential direction, the mouth of the wound core cannot be opened, and the coil cannot be mounted.

On the other hand, when the winding shaft 1 is rotated twice, not only does the winding time of the strip material block 3 become longer, but also the joint between the leading end and the trailing end of the strip material block 3 Will be passed twice.

The strip 3 passed under the holding claw 14
Since the tip of the outer part loses the guiding force from the outside, it once advances in the tangential direction, and then bends in the circumferential direction at the winding port, but when bending in the circumferential direction, The force going backwards is inevitably applied. Since this force causes the seam of the band material block to slightly shift, it is better not to pass the seam through the winding opening as much as possible.

In view of the above problems, an object of the present invention is to provide a method and an apparatus for manufacturing a wound iron core having a short winding time and high winding accuracy.

[0014]

According to a first aspect of the present invention, there is provided a strip block comprising a plurality of strips which are superposed with a slight displacement in a circumferential direction of a winding shaft. In a winding core manufacturing apparatus for manufacturing a winding core by winding a plurality of windings around the winding shaft while aligning a front end portion and a rear end portion of a band material block, two rollers arranged around the winding shaft; A transport mechanism that transports the block, a belt that is run around the two rollers while traveling while winding the transported strip of material around the winding shaft, and the two belts that do not block the transport path of the strip of material. A holding claw that is arranged to be brought close to one of the rollers and presses a portion of the strip material block where the belt is not wrapped, and wherein the transport mechanism has a rear end of the strip material block wound around the winding shaft. Superposed state the leading end of the next strip block, wound core manufacturing apparatus characterized by conveying the next strip block is provided.

According to a second aspect of the present invention for achieving the above object, in the first aspect, the transport mechanism comprises:
A conveying guide member for superimposing the two end portions of the belt material block wound around the winding shaft so that the front end portion of the next material block does not contact the rear end portion of the material strip; A conveying roller rotated by
A winding core manufacturing apparatus is provided, wherein the conveying roller is provided with a pressing roller for pressing the two ends overlapping each other.

According to a third aspect of the present invention for achieving the above object, in the first or second aspect, the winding shaft is provided so as to be movable in a two-dimensional direction. Is provided.

According to a fourth aspect of the present invention to achieve the above object, in the first, second, or third aspect, the two rollers are formed so as to have different diameters from each other. The present invention provides an apparatus for manufacturing a wound iron core.

According to a fifth aspect of the present invention to achieve the above object, a strip material block composed of a plurality of strip materials which are overlapped with each other with a slight displacement in the circumferential direction of the winding shaft is provided at the front end of the strip material block. In the winding core manufacturing method of manufacturing a winding core by winding a plurality of windings on the winding shaft while aligning the rear end and
A method for manufacturing a core for winding a new band material block around the winding shaft in a state in which a front end portion of the new band material block is superimposed on a rear end portion of the band material block not wound around the winding shaft. Is provided.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a core manufacturing apparatus according to an embodiment of the present invention.

FIG. 1 shows a strip support 30, an NC roll feeder 40, and a shifting and overlapping mechanism 50, which are a part of the core manufacturing apparatus of the present embodiment. The strip support 30 supports a single strip-shaped silicon steel sheet 31 before cutting, wound around a mandrel. The silicon steel sheet of the present embodiment has a thickness of 0.3 mm and a width of 200 mm. N
The C-roll feeder 40 pulls in a silicon steel plate while rotating the mandrel by the motor 32, cuts the silicon steel plate into a predetermined length with the cutting blade 41, and cuts the silicon steel plate (hereinafter, referred to as a strip).
Are sequentially transmitted to the overlapping mechanism 50. The shifting and stacking mechanism 50 shifts the fed strips little by little and stacks them. When a certain amount of strips are stacked, the transport mechanism 60
This is transported in a predetermined direction as one strip material block. During the transport, the lying strip of material is turned vertically by the transport mechanism 60, and two receiving plates 61 to be described later are used.
Inserted between.

FIG. 2 shows a part of the transport mechanism 60 and the winding mechanism 10 not shown in FIG. 1 as viewed from above.

The winding mechanism 10 includes a winding shaft 1, two rollers 18, 12 disposed around the winding shaft 1, a belt 13 running while winding the transported band material block around the winding shaft 1, A pressing claw 19 is provided so as to be brought close to the roller 18 so as not to block the conveyance path of the strip material block. The winding shaft 1 has two windings depending on the winding amount of the strip.
It can move freely in the dimension direction. Although not particularly shown, the mechanism includes a guide rail extending in the X direction and a Y-axis.
A table supporting the winding shaft 1 is arranged on a structure in which guide rails extending in the direction are combined with each other. Of course, the winding shaft 1 may be guided in a two-dimensional direction by using other configurations. The diameter of the reel 1 is 200
mm.

The transport mechanism 60 includes two receiving plates 61 for receiving the band material blocks, two guide plates 65 and 66,
A conveying roller 63 that rotates by running the belt 13,
A pressing cylinder 64 capable of moving the pressing roller 62 in the direction of arrow B is provided. The guide plate 65 includes a spring 65a.
By this force, the leading end portions of the band material blocks inserted into the two receiving plates 61 can be slightly separated from the transport roller 63. The guide plate 66 serves to overlap the inserted band block so that the front end of the band block does not collide with the rear end of the already sent band block. The pressing roller 62 is supported by a support shaft 62a via a normal bearing.

The belt 13 is stretched over a plurality of rollers including the rollers 12 and 18, and the tension is kept constant by a belt tension unit 15.
The servo motor 16 drives the roller 12 to rotate, and causes the belt 13 to run in the direction of arrow D. The head of the belt tension unit 15 moves the winding shaft 1 with an increase in the winding amount.
Moves to the left in the figure while applying a constant tension to the running belt so that it can move away from the two rollers 12 and 18. The rotation angle and rotation speed of the winding shaft 1
, And the detection result is sent to a control device (not shown). The control device controls the operation of each device including the servomotor 16 and the pressing cylinder 64 based on the detection result. The rotation speed of the winding shaft 1 is approximately 30r
pm.

Next, the operation of the characteristic portion of this embodiment will be described with reference to FIGS. FIG. 2 shows a state before a rear end portion of a certain band material block 3 (hereinafter, referred to as a band material block A) is wound around the winding shaft 1. The next strip 3 (hereinafter referred to as strip B)
In this state, it is inserted between the two receiving plates 61 and transported to the position shown in FIG. At this time, the front end of the strip material block B is guided by the guide plates 65 and 66, and is arranged so as to overlap with the rear end of the strip material block A without colliding with the rear end portion (S101 in FIG. 3). . The pressing cylinder 64 presses this tip against the transport roller 63 (S102). After that, the servo motor 16
2 to rotate the belt 13 in the direction of arrow D.
Thereby, the strip material block A is wound around the winding shaft 1. On the other hand, the conveying roller 63 is rotated by the traveling of the belt 13, and advances the band block B pressed against itself by the pressing roller 62 at the same speed as the band block A. That is, the strip material block B is conveyed in a state where the front end part of the next strip material block B is superimposed on the rear end part of the strip material block A wound around the winding shaft 1. If the transport roller 63 is rotated by the belt 13 for winding the band block around the winding shaft 1, the band blocks A and B can be used without using an expensive device.
Can be carried out synchronously as described above.

When the encoder 17 detects that the winding shaft 1 has made one rotation (S104), the control device stops the servomotor 16 and stops the belt 13 (S105). At this time, the transport block B has moved to the position of the transport block A.

On the other hand, the control device activates a timer (not shown) at the same time as the running of the belt 13 (S201).
Perform time measurement. When the predetermined time has elapsed, the pressing cylinder 64 is driven to retract the pressing roller 62 (S202). Thereafter, the timer is reset (S20).
3). The predetermined time is set so that the pressing of the pressing roller 62 is continued at least until the belt material block being conveyed is caught in the running belt.

The above operation is repeated until a predetermined winding amount is reached (S106).

According to this embodiment, since the rear end of the band block and the front end of the next band block are wound up in an overlapping state, each of the band blocks after the completion of winding is obtained. Are aligned in the radial direction as shown in FIG. 6 (a).

The winding shaft 1 moves away from the two rollers 12 and 18 with the belt winding force applied as the winding amount of the belt material block increases, but according to the present embodiment. For example, since the winding shaft 1 is movable in the two-dimensional direction, the wound strip of material can be firmly pressed against the two rollers 12 and 18 as shown in FIG.

On the other hand, in the prior art, since the winding shaft 1 can move only in the direction of the arrow A, a gap is formed around one of the rollers, and the wound strip material is loosened (FIG. 4B). In FIG. 4A, the two rollers have the same diameter so that the difference from the related art is clear.

Further, when the diameter of the roller 18 is smaller than the diameter of the roller 12 as in the present embodiment, even when the width of the roller is narrowed, the strip can be easily inserted into the winding hole (FIG. 5 (a)). As the width of the roller is narrower, the belt spreads over the outer peripheral surface of the strip material block,
The winding force is improved. On the other hand, in the related art, when the band material block is to be inserted at the frontage, the band material block is largely warped, and an appropriate insertion angle cannot be obtained (see FIG. 5B).

The above is one embodiment of the present invention, but the specific numerical values shown here are merely examples, and the present invention is not limited to this.

[0034]

According to the present invention, when a single strip of material is wound around a winding shaft, only one rotation of the winding shaft is required. The winding time is halved. Further, since the number of times the seam of the strip material block passes through the winding opening is also reduced, a highly accurate winding operation in which the seam does not shift can be performed.

[0035]

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a mechanism for manufacturing a strip material block according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a winding mechanism of a strip material block according to an embodiment of the present invention.

FIG. 3 is a flowchart showing the operation of the winding mechanism shown in FIG. 2;

FIG. 4A is an explanatory view (part 1) of a winding operation of a strip material block according to an embodiment of the present invention. FIG. 4B is an explanatory view (part 1) of a conventional winding operation of a band material block.

FIG. 5A is an explanatory view (part 2) of a winding operation of a strip material block according to an embodiment of the present invention. FIG. 5 (b) is an explanatory view (part 2) of a conventional winding operation of a strip material block.

FIG. 6 is an explanatory view related to the structure of a wound iron core.

FIG. 7 is an explanatory diagram relating to an example of a process when the wound iron core is incorporated into an electric device or the like.

FIG. 8 is a configuration diagram showing a conventional strip block winding mechanism.

FIG. 9 is an explanatory view (part 3) of a conventional winding operation of a band material block.

[Explanation of symbols]

1: reel, 2: strip, 3: strip block, 4: iron core, 5: coil, 10: winding mechanism, 11, 1
2, 18, 22, 23: roller, 13: belt, 1
4, 19: presser claw, 15: belt tension unit, 16: servo motor, 17: encoder, 2
0, 60: transport mechanism, 21, 61: receiving plate, 24:
Clamp cylinder, 25: Push-in cylinder, 3
0: strip support, 31: steel plate, 32: motor, 4
0: NC roll feeder, 41: cutting blade, 50: offset stacking mechanism, 62: pressing roller, 63: transport roller, 64: pressing cylinder, 65, 66: guide plate

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Junichi Ishizuki 46-1 Tomioka, Nakajo-cho, Kitakanbara-gun, Niigata Industrial Machinery Division, Hitachi, Ltd. (72) Inventor Hiroshi Katano 46 Tomioka, Nakajo-cho, Kitakanbara-gun, Niigata Prefecture Address 1 Inside Nakajo Engineering Co., Ltd. (56) References JP-A-4-241408 (JP, A) JP-A-6-204062 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) H01F 41/02 H01F 27/24

Claims (5)

(57) [Claims] 1. A plurality of band blocks, each of which is composed of a plurality of band members and superposed with a slight displacement in the circumferential direction of the bobbin, are wound around the bobbin while aligning a front end portion and a rear end portion of the band block. In a winding core manufacturing apparatus for manufacturing a winding core, two rollers arranged around the winding shaft, a transfer mechanism for transferring the strip material block, and running while winding the transferred strip material block around the winding shaft A belt stretched over the two rollers, and the belt is disposed so as to be brought close to one of the two rollers without blocking a conveyance path of the band block, so that the belt of the band block does not wind around the belt. A presser claw for pressing a portion of the next strip, wherein the transport mechanism is configured to overlap a front end of the next strip with a rear end of the strip being wound around the reel. B Tsu wound core manufacturing apparatus characterized by conveying the click. 2. The apparatus according to claim 1, wherein the transport mechanism is configured to control the two end portions of the strip block wound around a winding shaft so that the front end portion of the next strip block does not contact the rear end portion of the strip block. A winding core, comprising: a conveyance guide member for superimposing ends, a conveyance roller rotated by running of the belt, and a pressing roller for pressing the two ends overlapped on the conveyance roller. manufacturing device. 3. The winding core manufacturing apparatus according to claim 1, wherein the winding shaft is provided so as to be movable in a two-dimensional direction. 4. The wound iron core manufacturing apparatus according to claim 1, wherein the two rollers are formed so as to have different diameters from each other. 5. A plurality of strips, each of which is composed of a plurality of strips which are superposed with a slight displacement in the circumferential direction of the reel, are wound around the reel while aligning the front end and the rear end of the strip. In the core manufacturing method for manufacturing a core, the new band material block is overlapped with a front end of the new material block on a rear end of the material block that is not wound around the winding shaft. And a method for manufacturing a wound iron core.