JPH0880016A - Wire material reshaping apparatus - Google Patents

Abstract

PURPOSE: To reshape a wire material to a target shape over a wide range of wire materials. CONSTITUTION: A V-groove 21 having a V-shaped cross section normal to Z direction is provided, two surfaces constituting this V-groove 21 is equipped with a V type holding block 20 and an opposite holding block 30 formed with a flat pushing surface 31 in X direction and Y direction. A wire material 10 is arranged between a pair of blocks 20 and 30 so that the wire material 10 faces in the Z direction, one of the blocks is placed near the other block, and the wire material 10 is pinched by a pair of blocks 20 and 30. Then, the wire material is pulled in Z direction while pinching the wire material 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rod straightening device for straightening bends of various wire rods such as bends of terminal portions of winding start and winding ends after a winding is attached to a stator core.

[0002]

2. Description of the Related Art For example, when a wire is wound to form a coil, the end of the wire is straightened so that the end of the wire can be easily connected to a terminal of an electric device. are doing.

Conventionally, as an apparatus for correcting such a wire rod, there is, for example, a device for sandwiching the wire rod between a pair of holding bodies in which a plurality of irregularities are arranged in a straight line to correct the bending of the wire rod. In this device, the wire rod is sandwiched so that one convex portion of the pair of clamping bodies is located in the other concave portion. However, with such a wire rod holding device,
If the wire rod is simply held, the bent wire rod may not be straightened sufficiently and, on the contrary, the waveform may correspond to the irregular intervals of the holding body. Therefore, as disclosed in Japanese Patent Application Laid-Open No. 62-220233, there is a method in which a pair of holding bodies is held by the pair of holding bodies and the pair of holding bodies is moved in the longitudinal direction of the wire.

Now, the procedure for correcting a wire rod by this apparatus will be specifically described with reference to FIG. FIG.
First, the wire 10 is held by the pair of holding bodies 1 and 5, as shown in FIG. At this time, the distance C between the pair of holding bodies 1 and 5 is smaller than the diameter D of the wire rod 10 so that the correction effect by the holding can be obtained. That is, D> C. Therefore, the wire rod 10 has the corners 4a of the first protrusions 2a of the one holding body 1 and the first protrusions 6a of the other holding body 5.
Is bent in a certain direction between the corner 8a and the corner 8a of the second projection 2b of the one holding body 1 and the corner 8b of the first projection 6a of the other holding body 5, and Can be bent in the opposite direction. Therefore, as described above, the wire rod 10 becomes corrugated. Therefore, as shown in FIGS. 2B and 2C, while holding the wire rod 10 between the pair of holding bodies 1 and 5, the pair of holding bodies 1 and 5 are moved in the longitudinal direction of the wire rod 10. In this way, by relatively moving the pair of holding bodies 1 and 5 with respect to the wire rod 10 in the longitudinal direction, the correction effect of the wire rod 10 is enhanced, and the wire rod 10 is prevented from becoming corrugated to some extent. There is.

[0005]

However, in such a conventional technique, the tip of the wire is bent backward, and the root of the wire protruding from the coil cannot be corrected. There is a problem in that post-processing of the end portion is hindered. Specifically, in the conventional wire rod straightening device, as shown in FIG. 18 (a), the positions of the convex portions 2 of the one holding body 1 and the convex portions 6 of the other holding body 5 are shifted to hold one of the holding bodies. Since the bending force is applied to the wire rod 10 between the corner 4 of the protrusion 2 of the body 1 and the corner 8 of the protrusion 6 of the other holding body 5, the first protrusion of the one holding body 1 (wire 2a on the root side of the
And the first recess of the other holding body 5 (recess on the root side of the wire)
The area between the wire 7a and the wire 7a is a useless portion, and the correction force cannot be applied to the wire 10 during this time, and the root portion of the wire 10 cannot be straightened. Also, a pair of holding bodies 1, 5
In the process of moving the wire rod 10 relative to the wire rod 10, as shown in FIG. 2C, the corner 4b of the second protrusion 2b of the one holding body 1 and the first protrusion 6a of the other holding body 5 are held. When the most distal end of the wire 10 is disengaged from the corner 8b of the
4a of the first convex portion 2a of the first and the first convex portion 6 of the other holding body 5
Since the force to bend the wire rod 10 in the opposite direction to the force to bend the wire rod 10 between the corners 8a of a disappears, the tip of the wire rod 10 bends.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a wire rod straightening device capable of surely straightening a wire rod into a desired shape in a wide range as much as possible. And

[0007]

A wire rod straightening device for achieving the above object has a groove having a V-shaped cross section perpendicular to a specific direction (hereinafter referred to as V groove). The two surfaces forming the V groove are flat in the specific direction when the wire rod is straightened, and when the wire rod is bent with the constant curvature, the constant curvature is increased as the wire rod advances in the specific direction. And a pressing surface facing the two surfaces forming the V groove and contacting the outer peripheral surface of the wire when the wire is placed in the V groove. However, the pressing surface is flat in the specific direction when straightening the wire rod, and when the wire rod is bent with the constant curvature, the pressing surface has the constant curvature as the wire rod advances in the specific direction. Bending opposing holding block, said V groove of said V-shaped holding block and said opposing holding block A block moving mechanism that supports both blocks so that the pressing surfaces of the blocks face each other, and moves at least one of the blocks in the perspective direction with respect to the other block, and holds a part of the wire rod. A wire rod gripping mechanism and, when straightening the wire rod, bends in the specific direction, and when bending the wire rod in the constant curvature, gradually bends in the constant curvature as the wire rod advances in the specific direction. The wire rod holding mechanism holding the wire rod in the direction
And a wire rod moving mechanism that moves the die holding block and the opposing holding block relative to each other.

Here, in the wire rod holding device, the block moving mechanism includes a drive source having an operation end that operates in the perspective direction, and the operation end of the drive source includes at least one of the two blocks. It is preferable to include an elastic member that elastically deforms in the perspective direction when a force that opposes the operation of the operation end is applied in the process of moving the block toward the other block.

Further, in the wire rod holding device, the block moving mechanism supports one of the two blocks so as to be swingable about an axis perpendicular to the specific direction and the perspective direction. Means are preferably provided.

Further, in the wire rod straightening device, when the wire rod is straightened in the specific direction, the wire rod moving mechanism includes the wire rod holding mechanism holding the wire rod, the wire rod holding mechanism, and the V-shaped member. A wire rod linearly moving mechanism that linearly moves in the specific direction relative to the holding block and the opposite holding block, the wire rod holding mechanism holding the wire rod, the V-shaped holding block, and the opposite holding pin together with the wire rod. A wire rod rotating mechanism that rotates relative to the block around an axis parallel to the specific direction may be provided.

[0011]

The operation of the wire rod straightening device of the present invention will be described below. In the following, the wire rod will be moved in a specific direction (hereinafter, Z
Direction. ) Will be described as an example. Therefore, here, the two surfaces forming the V groove and the pressing surface are formed flat in the Z direction.

First, a part of one wire is gripped by the wire gripping mechanism so that the wire faces the Z direction and is located between both blocks. Subsequently, the block moving mechanism is driven to reduce the mutual distance between the two blocks, and the two wires are sandwiched between the two blocks. In the process in which the wire rod is clamped by both blocks, for example, if the wire rod at a specific position in the Z direction comes into contact with the pressing surface of the opposing holding block first, the wire rod at this position is pushed by this pressing surface and finally In addition, it also comes into contact with the two surfaces forming the V groove of the V-shaped holding block. As a result, the wire rod at the specific position in the Z direction is
The position in the plane perpendicular to the Z direction is determined. As described above, each part of the wire in the Z direction receives a force from the three surfaces (= the pressing surface + the two surfaces forming the V groove), and the position of each part in the plane perpendicular to the Z direction. Is determined. Z of wire
The positions in the plane perpendicular to the Z direction with respect to the respective parts in the direction are set to the positions aligned in the Z direction because the two surfaces forming the V groove are also formed so that the pressing surfaces are flat in the Z direction. Therefore, the wire is straightened almost straight in the Z direction.

Next, while holding the wire rod between the pair of blocks, the wire rod moving mechanism is driven to move the wire rod in the Z direction relative to the pair of blocks. As a result, the portions of the wire rod held between both blocks are surely straight in the Z direction, following the three flat surfaces in the Z direction.

By the way, both the V-groove forming surface and the pressing surface are formed flat in the Z direction, and the V-groove forming surface and the pressing surface are opposed to each other.
Of the wire set so as to face the Z direction, all the portions having the two surfaces forming the V groove and the pressing surface in the Z direction must be in contact with the two surfaces forming the V groove and the pressing surface. become. Therefore, with respect to the portion where the block exists, the wire can be straightened without waste.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of a wire rod straightening device according to the present invention will be described below with reference to the drawings.

First, a wire rod straightening device according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 4 and 5, the wire rod straightening device of this embodiment is one in which the wire rod 10 is wound to form a coil, and then the terminal portion 11 of the wire rod 10 is straightened. In this wire rod straightening device, a coil clamp 60 that holds the coil body 12 and supports the coil body 12 and a coil clamp 60 in a direction that straightens the wire rod end portion 11 extending from the coil body 12 (hereinafter, referred to as Z direction). A cylinder 61 for moving 60 and a pair of holding blocks for holding the wire rod end portion 11 (hereinafter,
Of the pair of holding blocks, one holding block is a V-shaped holding block 20, and the other holding block is an opposite holding block 30. ), A V block moving mechanism 40 that supports the V-shaped holding block 20 and moves in a direction (hereinafter, referred to as Y direction) perpendicular to a direction in which the wire rod end portion 11 is straightened, and an opposite holding block 30. A counter block moving mechanism 50 that supports the coil and moves in the Y direction, and a cylinder 6 that moves the coil clamp 60.
1. A device moving mechanism (not shown) for moving the V block moving mechanism 40 and the opposing block moving mechanism 50 to adjust their mutual positional relationship.

The V block moving mechanism 40 includes a rail 41 extending in the Y direction, a linear guide 42 engaged with the rail 41 so as to be movable in the Y direction, and a V type holding block 2.
A block support base 43 that is fixed to the linear guide 42 while supporting 0, and a cylinder 44 that moves the block support base 43 in the Y direction together with the V-shaped holding block 20 are provided.

The opposing block moving mechanism 50 includes a rail 51 extending in the Y direction and a rail 51 movably in the Y direction.
A linear guide 52 that is engaged with the block support base 53 that swingably supports the opposite holding block 30,
One end is attached to the block support base 53 and Y
A coil spring 54 that can expand and contract in the direction, and a connecting plate 55 to which the other end of the coil spring 54 is attached and which is fixed to the linear guide 52.
Guide plates 56, 56 for guiding the movement of the opposite holding block 30 and the block support base 53 with respect to the connecting plate 55 in the Y direction, and the operating end thereof are the connecting plate 5.
5, a cylinder 57 attached to the counter holding block 30 for moving the linear guide 52, the block support base 53 and the like in the Y direction.

As shown in FIGS. 1 to 3, the block support base 53 includes a swing pin 53a extending in an X direction perpendicular to the Z direction and the Y direction, and a pin support plate for supporting the swing pin 53a. 53b and 53b, and a block support base body 53 that supports the pin support plates 53b and 53b.
c and guide pins 53d, 53d projecting in the Z direction from the block support base body 53c. The opposite holding block 30 is attached to the swing pin 53a so as to swing around the swing pin 53a of the block support base 53. A guide pin 53d projecting in the Z direction from the block supporting base body can be inserted into the guide plate 56, and a guide hole 56a that is long in the Y direction.
Are formed. The guide pin 5 is inserted into the guide hole 56a.
By fitting 3d, relative movement in the Y direction of the block support base 53 and the opposing holding block 30 with respect to the connecting plate 55 due to the expansion and contraction of the coil spring 54 is stabilized.

The opposed holding block 30 has a rectangular plate shape, and the two surfaces 31 and 32 facing in the Y direction are both formed flat. Of the two flat surfaces, one surface forms a pressing surface 31 that comes into contact with the wire 10, and the other surface forms a back surface 32 to which the block support base is attached. As shown in FIGS. 1 to 3, the V-shaped holding block 20 is formed so that a cross section perpendicular to the Z direction forms a V shape. The V groove 21 formed by two flat surfaces intersecting each other at a constant angle (90 °) is dented in the (−) Y direction.
The length of the V-shaped holding block 20 in the Z direction (20 mm) is somewhat longer than the length of the opposite holding block 30 in the Z direction (16 mm). Both end portions of a portion corresponding to the V arm of the V-shaped holding block 20 are notched. This notch 2
2, 22, the length in the Z direction is the opposite holding block 30.
Is slightly longer than the length in the Z direction, and the depth in the (-) Y direction when the wire rod 10 having a predetermined diameter is placed in the V groove 21 is pressed against the outer peripheral surface of the wire rod 10 by the opposing holding block 30. The surface 31 is formed to a depth at which it can contact. V
At both ends in the Z direction of the mold holding block 20, both end portions of a portion corresponding to the V arm of the V holding block 20 are not cut out, and the V-shaped arm ends 23, 23, ... , While guiding the opposite holding block 30 into the notches 22 and 22,
It plays a role of guiding the wire 10 to the bottom of the V groove 21.

Next, the operation of the wire rod straightening device of this embodiment will be described. Before the operation, the wire rod straightening device of this embodiment is in a standby state as shown in FIGS. 4 and 5. That is, with the cylinder 61 contracted, the mutual spacing in the Y direction between the V block moving mechanism 40 and the opposing block moving mechanism 50 is such that the coil body 12 interferes with the mechanisms 40, 50 even if the coil body 12 enters between them. The intervals do not match. Further, the cylinder 44 of the V block moving mechanism is also in a contracted state, and the linear guide 42, the block support base 43, and the V-shaped holding block 20 retreat toward the most (-) Y direction side with respect to the cylinder 44 and the rail 41. It is in the state of having done. In addition, the opposing block moving mechanism 5
The cylinder 57 of 0 is also in a contracted state.
7 and the rail 51, the linear guide 52, the block support base 53, and the opposite holding block 30 are the most (+).
It is in a state of retreating to the Y direction side. However, the block support base 53 and the opposing holding block 30 are in a state where they can be retracted in the (+) Y direction side when the coil spring 54 contracts, and the most (-) Y with respect to the connecting plate 56 and the guide plate 56. It is in the state of advancing toward the direction side. In addition,
As shown in FIGS. 4 and 5, the V-shaped holding block 20 and the opposed holding block 30 are arranged in the X direction and the Z direction, respectively.
Located in the same position. Further, the wire rod end portion 11 extending from the coil body 12 is located at substantially the same position as the V-shaped holding block 20 and the opposite holding block 30 in the X and Z directions.

Next, the cylinder 61 is driven to move the coil clamp 60 in the (-) Z direction for each coil body 12 held by the coil clamp 60. At this time,
As shown in FIG. 6, the coil body until the portion of the wire rod end portion 11 on the side of the coil body 12 (hereinafter referred to as the root portion) is located between the V-shaped holding block 20 and the opposite holding block 30. 12 is moved in the (-) Z direction. Subsequently, a device moving mechanism (not shown) is driven to V
The V-shaped holding block 20 and the V-block moving mechanism 40 are moved in the (+) Y direction to the position immediately before the wire rod terminal portion 11 can be held by the model holding block 20 and the opposite holding block 30, and the opposite holding block 30 The opposing block moving mechanism 50 is moved in the (-) Y direction.

Next, the cylinder 44 of the V block moving mechanism 40 is driven. When the cylinder 44 is driven, the linear guide 42 moves in the (+) Y direction along the rail 41 extending in the Y direction. As a result, the linear guide 42
The block support base 43 fixed to the support base 43 and the V-shaped holding block 20 fixed to the support base also move in the (+) Y direction. At this time, the cylinder 44 is driven until the wire rod end portion 11 contacts the V groove 21 of the V-shaped holding block 20.

The wire end portion 11 does not always protrude from the same position of the coil body 12 in the same direction, and normally, the position and direction with respect to the coil body 12 are slightly deviated during the coil manufacturing process. Among these deviations, the deviation in the Z direction is adjusted by the driving amount of the cylinder 61, and the deviation in the Y direction is adjusted by the driving amount of the cylinder 44 of the V block moving mechanism 40. In addition, the displacement in the X direction is caused by the V-shaped holding block 2
It is absorbed by the V groove 21 of 0. Even if the wire rod end portion 11 is slightly displaced in the X direction with respect to the V-shaped holding block 20, the wire rod end portion 11 is relatively moved in the Y direction while being in contact with the V-shaped arm end portions 23, 23, .... This is because, in the process, the guide is guided to one of the two surfaces forming the V groove 21, and is gradually guided to the intersection of the two surfaces forming the V groove 21, that is, the bottom of the V groove 21.

Next, the cylinder 57 of the opposing block moving mechanism 50 is driven. When the cylinder 57 is driven, the connecting plate 55 and the linear guide 52 move in the (−) Y direction. At this time, the linear guide 52 moves along the rail 51 extending in the Y direction. As a result, the guide plates 56, 5 fixed to the connecting plate 55
6. The block support base 53 attached to the connection plate 55 via the coil spring 54, and the opposing holding block 30 attached to the block support base 53 also move in the (−) Y direction. The opposing holding block 30 has its pressing surface 31 in contact with the wire 10 in the V groove 21 in the process of moving in the (−) Y direction. When the opposite holding block 30 moves in the (−) Y direction even after contact with the wire rod 10, the wire rod 10 causes the V groove 21 to move as described above.
Is guided to one of the two surfaces forming the V groove 21, and is gradually guided to the intersection of the two surfaces forming the V groove 21, that is, the bottom of the V groove 21, and finally, as shown in FIG. In addition to the pressing surface 31 of the opposing holding block 30, the two surfaces forming the V groove 21 come into contact with each other. After that, the cylinder 57 is driven so that the opposing holding block 30 moves in the (-) Y direction. At this time, since the wire rod 10 cannot move further in the (-) Y direction, the opposing holding block 30
However, it cannot move further in the (-) Y direction. Therefore, as shown in FIGS. 2 and 3, 6 and 7, the cylinder 57 is driven to move the connecting plate 55 in the (−) Y direction, whereby the connecting plate 55 and the opposing holding block 30 are moved.
The coil spring 54 between and contracts, and a force corresponding to the contracted amount is applied to the wire 10. The wire 10 is straightened by this force.

As described above, by utilizing the elastic force of the coil spring 54, the magnitude of the holding force can be easily adjusted as compared with the case where the cylinder 54 is simply driven to move the opposing holding block 30. This is because when the cylinder 54 is simply driven without moving the coil spring 54 to move the opposing holding block 30, the holding force becomes a magnitude corresponding to the deformation amount of the wire rod 10. It is not possible to estimate the gripping force because it depends on the initial bending state of. On the other hand, when the coil spring 54 is used, the holding force corresponds to the contraction amount of the coil spring 54, and this can be easily estimated. However, when the force applied by the cylinder 57 is provided with a detector, the holding force can be managed, and therefore the counter holding block 30 may be provided directly on the cylinder 57. Further, in the present embodiment, the counter block moving mechanism 50 is provided with the spring 54. However, even if the spring 54 is provided in the V block moving mechanism 40, if the cylinder 57 of the counter block moving mechanism 50 is driven,
Since the spring 54 contracts and the holding force can be estimated from the contraction amount, the spring 54 may be provided in the V block moving mechanism 40.

By the way, in this embodiment, the opposite holding block 30 can swing about the swing shaft 53a extending in the X direction. Therefore, as shown in FIG.
Even if the wire rod 10 in the groove 21 is bent, the opposing holding block 30 oscillates depending on the shape of the wire rod 10 so as to contact the wire rod 10 in the largest possible area. Therefore, for example, it is possible to prevent the corners of the opposing holding block 30 from coming into contact with the wire 10 and damaging the local part of the wire 10.

Next, as described above, the opposite holding block 3
While holding the wire rod 10 between 0 and the V-shaped holding block, the cylinder 61 is driven to move the coil clamp 60 together with the coil body 12 in the (+) Z direction. Therefore, the portion of the wire rod 10 held between the opposing holding block 30 and the V-shaped holding block moves from the root portion to the tip end side. In this way, the wire rod 10 and V
By moving the wire rod 10 in the Z direction relative to the die holding block, the portions of the wire rod 10 held by the blocks 20 and 30 are all three flat surfaces in the Z direction (V groove 2).
Following the two surfaces forming 1 and the pressing surface 31), it becomes surely straight in the Z direction.

By the way, since the two surfaces forming the V groove 21 and the pressing surface 30 are formed flat in the Z direction, the two surfaces forming the V groove in the Z direction among the portions in the Z direction of the wire. With respect to the portion where the and the pressing surface exist, all of them are in contact with the two surfaces forming the V groove and the pressing surface. For this reason, the wire rod can be corrected almost without waste in the portion where the block exists. Therefore, the root part of the wire 10 can also be corrected. As a result of actually correcting the wire rod 10 having a diameter of 1.2 mm and a curvature of 0.0125 using the wire rod straightening device of the present embodiment, when a holding force of 5.0 kg was applied, the curvature of the wire rod 10 was initially 20. It doubled to 0.000625, and became substantially straight.

In this embodiment, both blocks 20, 3 are
Although both 0 are moved in the Y direction, it is sufficient that the other block moves in the Y direction relative to one block, so one of the blocks 20 and 30 is fixed and the other block is fixed. The block moving mechanism may be provided only in the block. In addition, in the present embodiment, the wire rod 10 is moved in the Z direction. However, in this case as well, it is sufficient if the wire rod 10 can move in the Z direction relative to both blocks 20 and 30, so the wire rod 10 is fixed. Alternatively, both blocks 20 and 30 may be moved in the Z direction. Further, in order to further enhance the correction effect, a rotation mechanism that rotates the cylinder 61 around the Z axis may be provided and rotated around the Z axis so that the wire rod can be pulled in the Z direction.

Next, a second embodiment according to the present invention will be described with reference to FIGS. As shown in FIG. 9, the wire rod straightening device of this embodiment straightens two wire rods at the same time.

The wire rod straightening device of this embodiment is the same as that of the first embodiment except that the shape of the V-shaped holding block is slightly different from that of the first embodiment. As shown in FIGS. 9 and 10, the V-shaped holding block 20a of the present embodiment has a V groove 2 when the two wire rods 10a and 10b are inserted in the V groove 21.
One of the two surfaces forming 1 is in contact with one wire 10a, the other is in contact with the other wire 10b, and the two wires 10a, 10b are both in contact with the pressing surface 31 of the opposite holding block 30. The notch 2 so that the opposing holding block 30 can be inserted into the notch 22a up to the position where
The depth of 2a in the (−) Y direction is set. That is, the depth of the notch 22a in the (-) Y direction is shallower than that in the first embodiment. Even if the V-shaped holding block 20 of the first embodiment is used, when the two wire rods 10a and 10b are put into the V-groove 21, the V-groove 21 is formed.
One of the surfaces is in contact with one wire 10a, the other is in contact with the other wire 10b, and the two wires 10a, 10
Since the opposite holding block 30 can be put into the notch 22 to a position where b can come into contact with the pressing surface 31 of the opposite holding block 30, the V-shaped holding block 20 of the first embodiment is left as it is. It doesn't matter which one you use.

In the following, the wire rod straightening device of the present embodiment is used.
The principle of simultaneous correction of the wires of the book will be described with reference to FIG. In the figure, (B) on the right side represents the wire rods 10a and 10b viewed from the Y direction, and (A) on the left side,
The respective cross sections at the positions I to VI in (B) are shown. Further, in the figure, the diameter of the wire rods 10a and 10b is D1, the mutual distance in the X direction between the center axis of the wire rod 10a and the center axis of the wire rod 10b is d, and the center axis of the wire rod 10a and the wire rod 1 are
Let h be the mutual distance in the Y direction from the central axis of 0b.

In the state of FIG. 1 (I), the wire rods 10a and 10b are
The mutual distance d in the X direction is D1 (= wires 10a, 10
In b), the mutual distance h in the Y direction is 0. At this time, the force F from the pressing surface 31 of the opposing holding block 30
Is the component force Fa on the wire rods 10a and 10b, respectively.
And a component force Fb. These component forces Fa and Fb
Is the resultant force of the reaction forces fa and fb acting on the wire rods 10a and 10b from the surface forming the V groove 21 and the drag forces fc and fc acting on the other wire rods at the contact points of the wire rods 10a and 10b. Balance with. In this state, each of the reaction forces fa, fb, fc acts as a compression force from the outer circumference of the wire rod 10a, 10b toward the central axis direction.

In the state of FIG. 2 (II), the wire rods 10a, 10b are
The mutual distance d in the X direction is larger than D1 and the mutual distance h in the Y direction is 0. At this time, the force F from the pressing surface 31 of the opposing holding block 30 is divided into the component force Fa and the component force Fb on the wire rods 10a and 10b, respectively, as in the state (I). Each wire rod 10a, 10b
In addition to component forces Fa and Fb, respectively, drag forces fa and fb act from the surface forming the V groove 21. These component forces F
The resultant forces fd and fd of the a and Fb and the drags fa and fb act to reduce the mutual distance d in the X direction between the wire rods 10a and 10b, and at the same time push down the wire rods 10a and 10b to (-) Y. To do. As a result, the wire rods 10a and 10b change to the state of FIG.

In the state of FIG. 3 (III), the wire rods 10a, 10
The mutual distance d in the X direction of b is larger than D1, and the mutual distance h in the Y direction is larger than 0. At this time, F from the pressing surface 31 of the opposing holding block 30 is the wire rod 1
Add all to 0a. That is, the component force Fa applied to the wire 10a becomes F. A drag fa also acts on the wire 10a from the surface forming the V groove 21. These forces Fa (= F)
The resultant force Fd of the drag force fa and the drag force fa acts to move the wire rod 10a in the (+) X direction as well as in the (-) Y direction. Therefore, the wire rods 10a and 10b change to the state shown in FIG. 1I after the state shown in FIG.

In the state shown in FIG. 4 (IV), the wire rods 10a, 10
b, the mutual distance d in the X direction is smaller than D1, the mutual distance h in the Y direction is larger than 0, and one wire 10a is V
The pressing surface 3 which is in contact with one surface forming the groove 21
1, the other wire 10b is in contact with the other surface forming the V groove 21, and the wire 10a, 10b are in contact with each other. At this time, F from the pressing surface 31 of the opposing holding block 30 is all added to the wire rod 10a. That is, the component force Fa applied to the wire 10a becomes F. This component force Fa (= F) is applied from the surface forming the V groove 21 to the wire rod 10a.
Drag acting on the wire 10a and the drag force acting on the wire 10a from the wire 10b at the contact point between the wires 10a and 10b.
Balance with the resultant force with c. Further, the V-groove 2 is provided on the wire 10b.
1 from the surface forming 1 and the wire rods 10a and 10b
The drag force fc from the wire 10a acts at the mutual contact points. The resultant force fd of the drag force fb and the drag force fc acts to move the wire rod 10b in the (+) X direction and the (+) Y direction. That is, the resultant force fd is
It works as a force to lift the wire rod 10b obliquely upward. Therefore, the wire rods 10a and 10b change to the state of FIG.

In the state of FIG. 5 (V), the wires 10a and 10b are
The mutual distance d in the X direction is smaller than D1 and the mutual distance h in the Y direction is larger than 0, and one wire 10a is in contact with one surface forming the V groove 21 and the pressing surface 31
, The other wire 10b is in contact with the two surfaces forming the V groove 21, and the wire 10a, 10b are in contact with each other. That is, the two wire rods 10 a and 10 b are in contact with each other and are aligned along one surface forming the V groove 21. At this time, the opposite holding block 3
F from the pressing surface 31 of 0 is all added to the wire rod 10a. The component force Fa (= F) applied to the wire 10a is the V groove 21.
Force fa acting on the wire 10a from one surface forming
And the wire rod 10a, 10b at the point of mutual contact of the wire rod 10
It is balanced with the resultant force with the drag force fc acting on the wire 10a from b. Further, the drag force fb from the other surface forming the V groove 21a and the drag force fc from the wire rod 10a act on the wire rod 10b at the contact point between the wire rods 10a and 10b. The drag forces fb and fc are in balance. Therefore, if the above force relationship is maintained, the wire rods 10a and 10b do not move. However, at the position slightly displaced in the Z direction from the position in this state, the state shown in FIG. 11 (IV) should be obtained, so the movement at this position causes the wire rod 1 to move further.
This state collapses due to the influence of the slippage of the circumferential surfaces of 0a and 10b, and the wire rods 10a and 10b change to the state of (I) in the figure after passing the state of (IV) in the figure.

The state of FIG. 6 (VI) is the wire rods 10a, 10
The mutual distance d in the X direction of b is 0 and the mutual distance h in the Y direction is D1, that is, the wire rods 10a and 10b are in contact with each other and aligned in the Y direction. At this time, F from the pressing surface 31 of the opposing holding block 30
Are all added to the wire rod 10a. The component force Fa (= F) applied to the wire rod 10a is balanced with the drag force fc acting on the wire rod 10a from the wire rod 10b at the contact point between the wire rods 10a and 10b. Further, at the contact point between the wire rods 10a and 10b, the drag force fc acting on the wire rod 10b from the wire rod 10a is V
It balances with the resultant force of the drags fa and fb from the two surfaces forming the groove 21. Therefore, if the above force relationship is maintained, the wire rods 10a and 10b do not move, as in the state of FIG. However, at the position slightly shifted in the Z direction from the position in this state, it should be in the state of (V) or (IV) in the same figure, so the movement at this position causes Further, this state is collapsed due to the influence of the slippage of the circumferential surfaces of the wire rods 10a and 10b, and the wire rods 10a and 10b change to the state shown in FIG. To go.

As described above, regardless of the positional relationship between the wire rods 10a and 10b, the applied force F is finally evenly divided among the wire rods 10a and 10b, and A stable state in which various forces acting on the wire rods 10a and 10b are balanced with each other, that is, a state shown in FIG. By the way, the states of (II) to (VI) in the figure are nothing but the states in which the wire rods 10a and 10b are bent when viewed from the state of (I) in the figure. Therefore, the same figure (II) ~
When the state of (VI) finally becomes the state of (I) in the figure, it means that the bending is corrected.

Although the movement of the wires 10a and 10b in the Z direction has not been described above, this embodiment also applies the force F to the wires 10a and 10b while also applying the force F to the wires 10a and 10b. Is moved in the Z direction.
When simultaneously correcting two wire rods 10a and 10b as in the present embodiment, it is necessary to move the wire rods 10a and 10b in the Z direction from the state of FIGS. 11 (II) to (VI) in FIG. )
Because it has the effect of smoothing the transition to the state of 1
The significance is greater than when the wire 10 of the book is straightened.

Next, a wire rod straightening device according to a third embodiment of the present invention will be described with reference to FIGS. 12 and 13.
In this embodiment, the angle formed by the two surfaces forming the V groove 21b of the V-shaped holding block 20b is set to 60 °, and other configurations are basically the same as those of the above embodiments. In addition, V
The depth of the notch 22b of the V-shaped holding block 20b is different from that of the above embodiment because the angle formed by the two surfaces forming the groove 21b is 60 °. Thus, even if the angle formed by the two surfaces forming the V groove 21b is 60 °, basically,
It is possible to obtain the same effect as that of the above embodiment.

By the way, the groove is V-shaped in combination with the opposite holding block 30 in the plane (XY plane) perpendicular to the direction in which the wire 10 extends (Z direction). This is because the position of the wire rod 10 in the XY plane is regulated by applying a force to the wire rod 10 from three or more independent directions. Therefore, the angle X formed by the two surfaces forming the V groove may be 0 ° <X <180 °. However, in reality, the V groove is formed in order to apply a force to the wire rod 10 from a direction in which it is dispersed evenly in the XY plane.
The angle X formed by the surface should be within the range of 30 ° <X <150 °.

Next, a wire rod straightening device according to a fourth embodiment of the present invention will be described with reference to FIGS. 14 and 15.
In the wire rod straightening device of this embodiment, the shape of the opposite holding block is changed from that of the above embodiment, and other configurations are basically the same as those of the above embodiments. In addition, because the shape of the opposing holding block 30c is changed, the V-shaped holding block 2
The shape of the notch 22c of 0c is also different from that of the above embodiment.

The opposed holding block 30c of this embodiment is formed by two flat surfaces 33, 33 whose pressing surfaces 31c intersect at a constant angle. Due to the flat two surfaces 33, 33, the opposing holding block 30c of this embodiment is
A V groove is formed which is recessed in the (+) Y direction. As described above, the pressing surface of the opposing holding block may be bent or may be bent with a certain curvature in the XY plane. That is, when the wire rod 10 is formed to be straight in the Z direction, the pressing surface may have any shape as long as it is flat in the Z direction.

Next, a wire rod holding device according to a fifth embodiment of the present invention will be described with reference to FIGS.
The wire rod holding device of this embodiment is for bending the wire rods 10a and 10b with a constant curvature.

The two surfaces forming the V groove 21d of the V-shaped holding block 20d of this embodiment are both linear in the XY plane as in the above embodiments and have a constant curvature in the YZ plane. bent. Further, the pressing surface 31d of the counter-holding block 30d of this embodiment is also linear in the XY plane as in the above embodiments except the fourth embodiment, and has a constant curvature in the YZ plane. bent. In addition, in this embodiment, the Z-direction cylinder 61 that moves the coil clamp 60 of the first embodiment in the Z-direction.
A Y-direction cylinder (not shown) for moving the cylinder 61 in the Y-direction is provided in the rear ((+) Z-direction).

In this embodiment, after the wire rods 10a and 10b are held by the opposing holding block 30d and the V-shaped holding block 20d, the Z-direction cylinder 61 and the Y-direction cylinder are driven to have a constant curvature as they progress in the Z direction. The wire rods 10a and 10b are pulled in a direction in which the wire gradually bends.
As described above, the opposing holding block 30d in which the pressing surface 31d is bent with a constant curvature in the YZ plane, and the V groove 2
The wire rods 10a, 10 are composed of a V-shaped holding block 20d whose two surfaces forming 1d are bent with a constant curvature in the YZ plane.
It is possible to bend the wire rods 10a and 10b with a constant curvature by gripping b and pulling the wire rods 10a and 10b in a direction in which the wire rods 10a and 10b gradually bend with a constant curvature as proceeding in the Z direction.

[0049]

According to the present invention, the pair of sandwiching blocks have their respective surfaces in line contact with the wire, and the entire length of the wire in the longitudinal direction is in line contact with the wire. The holding block has almost no wasted portion in the longitudinal direction of the wire. For this reason, the wire rod in the portion held by the pair of holding blocks can surely come into contact with each surface of the pair of holding blocks and be corrected into a desired shape. Therefore, the wire can be straightened over a wide range of the wire including the root part of the wire.

Further, in the present invention, the wire rod is moved relative to the pair of holding blocks while the wire rod is held by the pair of holding blocks. Therefore, during the movement process, the wire rod holds the pair of holding blocks. It is possible to reliably correct the wire rod into a desired shape by following the shapes of the respective surfaces. In addition, the part held by the pair of holding blocks during the movement of the wire rod,
Since all are straightened, the wire rod can be straightened over a wide range of the wire rod by one treatment, and the efficiency of the straightening treatment can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a pair of holding blocks according to a first embodiment of the present invention.

FIG. 2 is a front view of a pair of holding blocks according to the first embodiment of the present invention.

FIG. 3 is a side view of a pair of holding blocks according to the first embodiment of the present invention.

FIG. 4 is a side view (standby state) of the wire rod holding device according to the first embodiment of the present invention.

FIG. 5 is a view on arrow V in FIG.

FIG. 6 is a side view (holding state) of the wire rod holding device according to the first embodiment of the present invention.

FIG. 7 is a view on arrow VII in FIG.

FIG. 8 is a side view (correction process) of a pair of holding blocks according to the first embodiment of the present invention.

FIG. 9 is a front view of a pair of holding blocks according to a second embodiment of the present invention.

FIG. 10 is a side view of a pair of holding blocks according to a second embodiment of the present invention.

FIG. 11 is an explanatory view showing the principle of simultaneous correction of two wire rods by a pair of holding blocks according to the second embodiment of the present invention.

FIG. 12 is a front view of a pair of holding blocks according to a third embodiment of the present invention.

FIG. 13 is a side view of a pair of holding blocks according to a third embodiment of the present invention.

FIG. 14 is a front view of a pair of holding blocks according to a fourth embodiment of the present invention.

FIG. 15 is a side view of a pair of holding blocks according to a fourth embodiment of the present invention.

FIG. 16 is a front view of a pair of holding blocks according to a fifth embodiment of the present invention.

FIG. 17 is a side view of a pair of holding blocks according to a fifth embodiment of the present invention.

FIG. 18 is an explanatory view showing a procedure for holding a wire rod by a conventional wire rod holding device.

[Explanation of symbols]

10 ... Wire rod, 20, 20a to 20d ... V-shaped holding block 21, 21, 21b, 21c, 21d ... V groove, 22, 22
a, 22b, 22c ... Notches, 30, 30c, 30d ...
Opposed holding and holding block, 31, 31c, 31d ... Pressing surface, 40 ... V block moving mechanism, 50 ... Opposing block moving mechanism, 53 ... Block support base, 53a ... Swing pin, 54 ... Coil spring, 60 ... Coil clamp,
61 ... Cylinder.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koki Taneda, 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Ltd.

Claims (4)

[Claims] 1. A wire rod straightening device for straightening a wire rod so that the wire rod is straightened or bent at a constant curvature, wherein a groove having a V-shaped cross section perpendicular to a specific direction (hereinafter referred to as V groove). And the two surfaces forming the V-groove are
A V-shaped holding block that is flat in the specific direction when straightening the wire, and bends with the constant curvature as it advances in the specific direction when bending the wire with the constant curvature. A pressing surface facing the two surfaces forming the V groove and contacting an outer peripheral surface of the wire material when the wire material is placed in the V-shaped groove, and the pressing surface is the wire material. In the case of straightening the flat wire in the specific direction, in the case of bending the wire rod with the constant curvature, an opposing holding block that bends with the constant curvature as it advances in the specific direction, A block that supports both blocks so that the V groove of the V-shaped holding block and the pressing surface of the opposed holding block face each other, and moves at least one of the blocks in a perspective direction with respect to the other block. Click movement mechanism and the wire gripping mechanism for gripping a portion of the wire, in the specific direction in the case of straightening the wire,
When the wire rod is bent with the constant curvature, the wire rod gripping mechanism that holds the wire rod in the direction in which the wire rod is gradually bent with the constant curvature as the wire rod advances in the specific direction A wire rod holding device comprising: a V-shaped holding block; and a wire rod moving mechanism that moves the V-shaped holding block relative to the opposing holding block. 2. The block moving mechanism includes a drive source having an operation end that operates in the perspective direction, and the operation end of the drive source in a direction in which at least one of the blocks approaches the other block. The wire rod clamp according to claim 1, further comprising: an elastic member that elastically deforms in the perspective direction when a force that opposes the operation of the operation end is applied in the process of moving the wire. apparatus. 3. The block moving mechanism comprises block supporting means for supporting one of the two blocks so as to be swingable around an axis perpendicular to the specific direction and the perspective direction. The wire rod straightening device according to claim 1 or 2. 4. The wire rod moving mechanism linearly moves the wire rod holding mechanism holding the wire rod relative to the V-shaped holding block and the opposing holding block together with the wire rod in the specific direction. A wire rod straight-moving mechanism, and a wire rod that holds the wire rod gripping mechanism holding the wire rod around the axis parallel to the specific direction relative to the V-shaped holding block and the opposite holding block together with the wire rod. The wire rod straightening device according to claim 1, 2 or 3, further comprising a rotating mechanism.