Lead wire insertion device

A lead wire insertion device includes a first chuck member and a second chuck member, each of which is separable, and connects a coil terminal of a cassette coil to a terminal of a connection terminal. The first chuck member is divided into the first chuck inner member and a first chuck outer member at a first division position that is inside both ends of a cross section of the coil terminal in a lateral direction, and that is offset from a center of the cross section in the lateral direction. The second chuck member is divided into the second chuck inner member and a second chuck outer member at a second division position that is inside the both ends of the cross section of the coil terminal in the lateral direction, and that is offset from a center of the cross section in the lateral direction.

INCORPORATION BY REFERENCE

The disclosure of Japanese Patent Application No. 2008-124658 filed on May 12, 2008 including the specification, drawings and abstract is incorporated herein by reference in its entirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a lead wire insertion device that includes a pair of a first chuck member and a second chuck member, wherein each of the first chuck member and the second chuck member is separable, and connects a coil terminal of a cassette coil to a terminal of a connection terminal, and a first chuck inner member is adjacent to a second chuck inner member.

2. Description of the Related Art

Japanese Patent Application Publication No. 2007-215356 (JP-A-2007-215356) describes a lead wire insertion device.FIG. 17shows the lead wire insertion device described in the publication No. 2007-215356. InFIG. 17, for example, a coil is used as a lead wire. A motor production device100, which is the lead wire insertion device, is used to fit a plurality of cassette coils69, in each of which a coil is wounded, to a connection terminal, and to insert coil terminals CA and CB of each cassette coil69into terminals TA and TB of the connection terminal, respectively. The motor production device100includes a first chuck member61and a second chuck member62, each of which is separable. The first chuck member61and the second chuck member62are used to guide the coil terminals CA and CB into the terminals TA and TB, respectively.FIGS. 16A and 16Bshow the first chuck member61, the second chuck member62, the terminals TA and TB, and the coil terminals CA and CB, which are extracted fromFIG. 17.FIG. 18Ais a front view showing the first chuck member61and the second chuck member62inFIG. 16A.FIG. 18Bis a front view showing the first chuck member61and the second chuck member62inFIG. 16B. Guide portions65and66, which are symmetric to each other, are formed in the first chuck member61. Guide portions65B and66B, which are symmetric to each other, are formed in the second chuck member62. Insertion holes68and70, which are symmetric to each other, are formed in the first chuck member61. Insertion holes68B and70B, which are symmetric to each other, are formed in the second chuck member62.

The first chuck member61and the second chuck member62are moved downward to the positions of the terminals TA and TB, while a first chuck inner member63and a first chuck outer member64are apart from each other, and a second chuck inner member63B and a second chuck outer member64B are apart from each other, as shown inFIGS. 16A and 18A. There is a predetermined distance between the first chuck inner member63and the first chuck outer member64, and between the second chuck inner member63B and the second chuck outer member64B. Therefore, the first chuck inner member63and the first chuck outer member64do not hit the terminal TA, and thus, do not deform the terminal TA. The second chuck inner member63B and the second chuck outer member64B do not hit the terminal TB, and thus, do not deform the terminal TB. Next, the terminal TA is sandwiched between the first chuck inner member63and the first chuck outer member64, and the terminal TB is sandwiched between the second chuck inner member63B and the second chuck outer member64B as shown inFIG. 16BandFIG. 18B, and the first chuck member61and the second chuck member62are stopped. Thus, both of the first chuck member61and the second chuck member62are positioned with respect to the terminals TA and TB, respectively. By moving the cassette coil69toward the terminals TA and TB, the coil terminal CA of the cassette coil69is guided by the guide portions65and66, and inserted into the terminal TA, and the coil terminal CB of the cassette coil69is guided by the guide portions65B and66B, and inserted into the terminal TB. After the coil terminals CA and CB are inserted into the terminals TA and TB, respectively, the first chuck inner member63and the first chuck outer member64of the first chuck member61are moved away from each other, and the second chuck inner member63B and the second chuck outer member64B of the second chuck member62are moved away from each other. That is, the terminals TA and TB are released from the first chuck member61and the second chuck member62, respectively. Then, the first chuck member61and the second chuck member62are moved upward. Thus, a series of the operations end.

Recently, the size of a motor has been reduced, and accordingly, the size of the cassette coil has been reduced, and the distance between the coil terminals CA and CB has been reduced. Therefore, in the lead wire insertion device in the related art, when the distance between the coil terminals CA and CB is short, a sufficient chuck stroke cannot be ensured, that is, each of the first chuck inner member63and the second chuck inner member63B cannot be sufficiently moved. Accordingly, there is a high possibility that the lead wires cannot be appropriately inserted into the terminals TA and TB. More specifically, if the distance between the coil terminals CA and CB of the cassette coil69is long as shown inFIGS. 15A and 15B, the first chuck inner member63and the second chuck inner member63B do not interfere with each other. Thus, a sufficient chuck stroke is ensured, that is, each of the first chuck inner member63and the second chuck inner member63B can be sufficiently moved. However, if the distance between the coil terminals CA and CB of the cassette coil69is short as shown inFIGS. 16A and 16B, or the distance between the coil terminals CA and CB is shorter than the distance shown inFIGS. 16A and 16B, the first chuck inner member63and the second chuck inner member63B interfere with each other, and a sufficient chuck stroke cannot be ensured, that is, each of the first chuck inner member63and the second chuck inner member63B cannot be sufficiently moved. Because the first chuck member61and the second chuck member62are symmetric, if the distance between the coil terminals CA and CB is short, the stroke of the first chuck inner member63and the stroke of the second chuck inner member63B are limited.

In a lead wire insertion device shown inFIGS. 14A and 14B, no recessed portion is formed in a first chuck inner member71of a first chuck member70, and a large recessed portion73is formed in a first chuck outer member71of the first chuck member70so that two coil wires of the coil terminal CA can be inserted into the recessed portion73. Because the second chuck member is symmetric to the first chuck member70, the description of the second chuck member is omitted. In the first chuck member70shown inFIGS. 14A and 14B, because no recessed portion is formed in the first chuck inner member71, when the terminal is released from the first chuck member70, the first chuck inner member71does not need to be moved. That is, the first chuck inner member71and a second chuck inner member71B do not need to be moved. Therefore, it is possible to make the first chuck inner member71and the second chuck inner member71B closer to each other.

However, a gap74may be formed when the first chuck inner member71is made close to the first chuck outer member72, in some cases. A pointed portion may be formed in the cut surface of the coil terminal CA when the coil terminal CA is cut. When the coil terminal CA is guided by the guide portion75, and inserted into the terminal TA, the pointed portion of the coil terminal CA may be guided into the gap74, and therefore, interference between the pointed portion and the terminal TA may occur. In this case, the coil terminal CA cannot be smoothly inserted into the terminal TA. When no recessed portion is formed in the first chuck inner member71, the first chuck inner member71may be made thin. However, in this case, the strength of the first chuck inner member71is made low. Therefore, the first chuck inner member71may be deformed due to some trouble. Even if the chuck member is deformed only slightly, the coil terminal CA cannot be appropriately guided.

SUMMARY OF THE INVENTION

The invention provides a lead wire insertion device which appropriately inserts coil terminals into terminals, and in which strokes of chuck members are not limited, even when a small motor, in which a distance between the coil terminals is short, is manufactured.

An aspect of the invention relates to a lead wire insertion device that includes a pair of a first chuck member and a second chuck member, each of which is separable, and connects a coil terminal of a cassette coil to a terminal of a connection terminal. The first chuck member is divided into a first chuck inner member and a first chuck outer member at a first division position, the first division position is inside both ends of a cross section of the coil terminal in a lateral direction of the first chuck member (i.e., the first division position is closer to the second chuck member than the outer end of the cross section is), and the first division position is offset from a center of the cross section of the coil terminal in the lateral direction of the first chuck member. The second chuck member is divided into a second chuck inner member and a second chuck outer member at a second division position, the second division position is inside the both ends of the cross section of the coil terminal in a lateral direction of the second chuck member (i.e., the second division position is closer to the first chuck member than the outer end of the cross section is), and the second division position is offset from a center of the cross section of the coil terminal in the lateral direction of the second chuck member. The first chuck inner member is adjacent to the second chuck inner member.

Each of the first chuck member and the second chuck member includes a pair of the inner member and the outer member. Thus, the four chuck members are arranged in a line. The first chuck inner member is closer to the second chuck member than the first chuck outer member is. The second chuck inner member is closer to the first chuck member than the second chuck outer member is.

In the lead wire insertion device according to the above-described aspect, an upper portion of the first chuck inner member may be separated from an upper portion of the first chuck outer member at a first upper division position, and the first upper division position may be outwardly offset from the center of the cross section (i.e., the first upper division position may be offset from the center of the cross section toward a side opposite to the second chuck member) in the lateral direction of the first chuck member. An upper portion of the second chuck inner member may be separated from an upper portion of the second chuck outer member at a second upper division position, and the second upper division position may be outwardly offset from the center of the cross section (i.e., the second upper division position may be offset from the center of the cross section toward a side opposite to the first chuck member) in the lateral direction of the second chuck member. The upper portion of the chuck inner member and the upper portion of the chuck outer member are closer to a root than the lower portion of the chuck inner member and the lower portion of the chuck outer member.

When each chuck member is opened, the chuck member is divided into the chuck inner member and the chuck outer member at the division position, the division position is inside both ends of the cross section of the coil terminal in the lateral direction of the chuck member, and the division position is offset from the center of the cross section of the coil terminal in the lateral direction of the chuck member. Therefore, even when the distance between the coil terminals is short, the stroke of the first chuck inner member of the first chuck member and the stroke of the second chuck inner member of the second chuck member are not limited, and thus, a sufficient chuck stroke is ensured. That is, the first chuck inner member and the second chuck inner member can be sufficiently moved. In other words, even when the distance between the coil terminals is short, it is possible to reduce the possibility that an adverse effect is caused due to the limitation of the stroke of the first chuck inner member and the stroke of the second chuck inner member. An elliptical insertion hole, in which the coil terminal can be inserted, is formed when the first chuck inner member and the first chuck outer member are close to each other. The edge of the lower portion of the insertion hole extends along the shape of the terminal. Therefore, a gap is not formed between the edge of the lower portion of the insertion hole and the edge of the terminal. This avoids the situation where the coil terminal is guided into a gap and interference between the coil terminal and the terminal occurs. Thus, when the coil terminal is inserted, interference between the coil terminal and the terminal does not occur. Accordingly, it is possible to smoothly insert the coil terminal into the terminal.

The upper portion of the first chuck inner member is separated from the upper portion of the first chuck outer member at the first upper division position, and the first upper division position is outwardly offset from the center of the cross section of the coil terminal in the lateral direction of the first chuck member. The upper portion of the second chuck inner member is separated from the upper portion of the second chuck outer member at the second upper division position, and the second upper division position is outwardly offset from the center of the cross section of the coil terminal in the lateral direction of the second chuck member. Therefore, each of the first chuck inner member and the second chuck inner member has sufficient strength, while a sufficient chuck stroke is ensured. This reduces the possibility that the coil terminal cannot be appropriately guided due to the deformation of the chuck inner member.

DETAILED DESCRIPTION OF EMBODIMENTS

Hereinafter, a method of producing a motor according to an embodiment of the invention will be described in detail with reference to the drawings.FIG. 12is a plane view showing an entire configuration where a connection terminal50is placed on an upper surface of a core51before cassette coils are fitted to the connection terminal50.FIG. 12also shows a position of one cassette coil to be fitted to the connection terminal50, in an automatic assembly machine. Twelve coil cores51aare provided in the core51. The coil cores51aare used to position the cassette coils30with respect to the connection terminal50, and to fit the cassette coils30to the connection terminal50. The cassette coil30shown inFIG. 12is trapezoidal. However, the trapezoidal cassette coils30and rectangular parallelepiped cassette coils (not shown) are alternatively disposed. The connection terminal50has a dodecagon shape, and includes edge portions54. Paired terminals TA and TB are provided at a center of each edge portion54to protrude upward. The distances W between centerlines of the terminals TA and TB at the twelve locations are the same. However, the terminals TA and TB at several locations are slightly offset from each other diametrically. Paired coil terminals CA and CB, which are end portions of coil wires of the cassette coil30, protrude. Each of the coil terminals CA and CB is constituted by two coil wires. Also, an enamel coating of each of the coil terminals CA and CB has been removed. Although each of the coil terminals CA and CB is constituted by the two coil wires in the embodiment, each of the coil terminals CA and CB may be constituted by one coil wire, or three or more coil wires.

A device that inserts the paired coil terminals CA and CB of the cassette coil30into the paired terminals TA and TB of the connection terminal50will be described.FIG. 7is a front view showing a chuck device with a guide, in which guide portions are positioned with respect to the terminals TA and TB, when chuck members are opened.FIG. 8is a plane view showing the chuck device when the chuck members are opened.FIG. 10is a front view showing the chuck device with the guide, in which the guide portions are positioned with respect to the terminals TA and TB.FIG. 11is a plane view showing the chuck device inFIG. 10.FIG. 9is a lateral view showing a left portion of the chuck device inFIG. 10. Each ofFIG. 9toFIG. 11shows the chuck device when the chuck members are closed. As shown inFIG. 10andFIG. 11, in the chuck device with the guide, a first chuck member1is symmetric to a second chuck member2. This is because a device that positions the coil terminal CA with respect to the terminal TA is symmetric to a device that positions the coil terminal CB with respect to the terminal TB. The chuck device is symmetric, and the right portion and the left portion of the chuck device have the same structure. Therefore, the first chuck member1, which is positioned on the left side of a centerline in each ofFIG. 10andFIG. 11, will be described, and the description of the second chuck member2, which is symmetric to the first chuck member1, and is positioned on the right side, will be omitted. In the figures, main constituent elements in the right portion of the chuck device are denoted by reference numerals assigned to constituent elements in the left side of the chuck device, and a reference character “B” following the reference numerals.

The first chuck member1and the second chuck member2are fitted to respective sliding members. Thus, the first chuck member1and the second chuck member2are slidably supported. The first chuck member1includes a first chuck inner member11and a first chuck outer member12. As shown inFIG. 7, a first sliding member16linearly slides on a first rail18fixed to a body of the chuck device. The first chuck inner member11is fixed to an end of a rod14of an air cylinder13using a screw15. As shown inFIG. 7, a second sliding member17linearly slides on a second rail19fixed to the body of the chuck device. A body of the air cylinder13is fixed to the first chuck outer member12.

The shape of the first chuck member1and the second chuck member2will be described with reference toFIG. 1andFIG. 2. Because the first chuck member1and the second chuck member2have the same configuration, and are symmetric to each other, reference numerals for the second chuck member2are omitted in each ofFIG. 1andFIG. 2. Also, because the first chuck member1and the second chuck member2have the same configuration, and are symmetric to each other, only the configuration of the first chuck member1will be described.FIG. 5is a plane view showing the first chuck member1and the second chuck member2inFIG. 1. To describe the first chuck inner member11, numbers in the 110s are assigned to constituent portions of the first chuck inner member11. To describe the first chuck outer member12, numbers in the 120s are assigned to constituent portions of the first chuck outer member12.FIG. 1shows the first chuck member1, the second chuck member2, the terminals TA and TB, and the coil terminals CA and CB. As shown inFIG. 1, a guide portion113is formed in the first chuck inner member11, and a guide portion123is formed in the first chuck outer member12. As shown inFIG. 5, the guide portion113constitutes a guide passage that extends from a large inlet opening portion to an insertion hole114. The cross section of the guide portion113gradually decreases from the inlet opening portion to the insertion hole114. The guide portion123constitutes a guide passage that extends from a large inlet opening portion to an insertion hole124. The cross section of the guide portion123gradually decreases from the inlet opening portion to the insertion hole124.FIG. 13is a perspective view showing the first chuck outer member12, the terminal TA, and the coil terminal CA. Note that, inFIG. 13, the inlet opening portion and the insertion hole124have right-angle corners, to show the three-dimensional structure of the guide portion123in an easy-to-understand manner. AlthoughFIG. 13shows only the configuration of the first chuck outer member12, the first chuck inner member11has the same configuration.

As shown inFIG. 1, when the first chuck inner member11and the second chuck inner member12are close to each other, the insertion holes114and124, through which the two coil wires of the coil terminal CA are inserted, are positioned at a center of an area formed by combining the guide portions113and123. The shape of the insertion holes114and124will be described with reference toFIG. 2. InFIG. 2, only the reference numerals required to describe the shapes of the insertion holes114and124are shown. A recessed portion is formed in an end portion of the first chuck inner member11. The recessed portion is the insertion hole114through which the coil wires of the coil terminal CA are inserted. The insertion hole114will be described. A length from a vertical line114d, which vertically extends from a most recessed portion114aof the insertion hole114, to a lower surface end portion114c(hereinafter, referred to as “length N”) is substantially equal to a half of the diameter of one coil wire of the coil terminal CA. A length from the vertical line114dto an upper end portion114b(hereinafter, referred to as “length O”) is substantially equal to a length obtained by summing the diameter of one coil wire of the coil terminal CA and a length shorter than a half of the diameter of one coil wire of the coil terminal CA. In this case, the length O is longer than the length N. Because the width of the first chuck inner member11is larger than the length O, the width of the first chuck inner member11is not extremely small. Therefore, sufficient strength of the first chuck inner member11is maintained. This reduces the possibility that the first chuck inner member11is deformed by some trouble, and the possibility that the coil wires of the coil terminal CA are not smoothly guided.

The insertion hole124will be described. A length from a vertical line124d, which vertically extends from a most recessed portion124aof the insertion hole124, to a lower surface end portion124c(hereinafter, referred to as “length M”) is substantially equal to a length obtained by summing the diameter of one coil wire of the coil terminal CA and a length shorter than a half of the diameter of one coil wire of the coil terminal CA. A length from the vertical line124to an upper end portion124b(hereinafter, referred to as “length L”) is substantially equal to two-thirds of the diameter of one coil wire of the coil terminal CA. In this case, the length M is longer than the length L. Because the width of the first chuck outer member12is larger than the length M, the width of the first chuck outer member12is not extremely small. Therefore, sufficient strength of the first chuck outer member12is maintained. This reduces the possibility that the first chuck outer member12is deformed by some trouble, and the possibility that the coil wires of the coil terminal CA are not smoothly guided. When the first chuck inner member11and the first chuck outer member12are close to each other, an elliptical insertion hole, in which the two coil wires of the coil terminal CA can be inserted, is formed by the insertion hole114and the insertion hole124. An edge of a lower portion of the insertion hole114and an edge of a lower portion of the insertion hole124extend along the shape of the terminal TA. Therefore, a gap, such as the gap74inFIG. 14B, is not formed between the edge of the lower portion of each of the insertion holes114and124and the edge of the terminal TA. This avoids the situation where the coil terminal CA is guided into a gap and interference between the coil terminal CA and the terminal TA occurs. Thus, when the coil terminal CA is inserted through the insertion hole114and the insertion hole124, interference between the coil terminal CA and the terminal TA does not occur. Accordingly, it is possible to smoothly insert the coil terminal CA into the terminal TA.

FIG. 3shows the chuck member1and the chuck member2that are opened. The first chuck inner member11and the second chuck inner member11B are close to each other. There is a distance P between the lower surface end portion114cof the insertion hole114of the first chuck inner member11, and the lower surface end portion124cof the insertion hole124of the first chuck outer member12. The distance P is substantially equal to the sum of the diameters of the two coil wires of the coil terminal CA.

As shown inFIG. 7, a stopper portion125is fitted to a left end portion of a fitting portion122. The stopper portion125determines the position of the first chuck outer member12when the first chuck member1is opened, by contacting a stopper screw21that is adjustably fitted to a stopper member20fixed to the body of the chuck device. Also, as shown inFIG. 8, a stopper screw24is adjustably fixed to a fitting portion112using a nut26. The stopper screw24determines the position of the first chuck inner member11when the first chuck member1is opened, by contacting a stopper25that is formed integrally with the fitting portion112.FIG. 9shows the relation between the heights of the chuck device and the cassette coil30. End portions of a coil35are bent at a right angle by right angle portions36, and protrude. Thus, the end portions of the coil35function as the paired coil terminals CA and CB.

Next, the advantageous effects of the chuck device with the guide, which has the above-described configuration, will be described. Because the second chuck member2is symmetric to the first chuck member1, only the advantageous effects of the first chuck member1will be described, and the description of the advantageous effects of the second chuck member2will be omitted. In a first station, the first chuck member1and the second chuck member2shown inFIG. 4are moved downward to positions corresponding to the terminals TA and TB as shown inFIG. 3, using means (not shown) for moving the first chuck member1and the second chuck member2upward and downward. When the first chuck member1and the second chuck member2are moved downward, no air is supplied to the air cylinder13shown inFIG. 7, and therefore, the stopper portion125of the first chuck outer member12is in contact with the stopper screw21due to a force of a returning spring provided in the air cylinder13, and the stopper screw24of the first chuck inner member11is in contact with the stopper25as shown inFIG. 8. Thus, the first chuck inner member11and the first chuck outer member12are constantly apart from each other by a predetermined distance, as shown inFIG. 6andFIG. 8.FIG. 6shows the first chuck member1and the second chuck member2that are opened, the terminals TA and TB, and the coil terminals CA and CB. When the chuck device with the guide is moved downward, the first chuck inner member11and the first chuck outer member12are apart from each other by the predetermined distance. Therefore, there is a sufficient gap between the first chuck inner member11and the terminal TA, and there is a sufficient gap between the first chuck outer member12and the terminal TA, as shown inFIG. 6. Accordingly, even if the position of the terminal TA varies, the first chuck inner member11and the first chuck outer member12do not hit the terminal TA, and thus, do not deform the terminal TA. Also, as shown inFIG. 6, the width of a portion of the first chuck inner member11, which is positioned on the side of the terminal TA, is small, and the width of a portion of the second chuck inner member11B, which is positioned on the side of the terminal TB, is small. Therefore, it is possible to make the first chuck member1and the second chuck member2close to each other. That is, even when the distance between the coil terminals CA and CB is short, it is possible to move the first chuck member1and the second chuck member2downward without deforming the terminals TA and TB.

Next, driving air for driving the air cylinder13is supplied to the air cylinder13, by operating an electromagnetic valve (not shown). As a result, the rod14shown inFIG. 10protrudes, and thus, the first chuck inner member11and the first chuck outer member12are simultaneously moved. Then, as shown inFIG. 5, one of the first chuck inner member11and the first chuck outer member12, which contacts the terminal TA earlier than the other, stops at a position at which the one of the first chuck inner member11and the first chuck outer member12contacts the terminal TA. The other of the first chuck inner member11and the first chuck outer member12further moves, and then, stops so that the terminal TA is sandwiched between the first chuck inner member11and the first chuck outer member12.FIG. 5shows the first chuck member1, the second chuck member2, the terminals TA and TB, and the coil terminals CA and CB, which are extracted fromFIG. 11. Thus, both of the first chuck inner member11and the first chuck outer member12are positioned with respect to the terminal TA. More specifically, the first chuck inner member11and the first chuck outer member12are fixed to the respective sliding members, and thus, the first chuck inner member11and the first chuck outer member12are able to move freely in a predetermined direction. Therefore, when the first chuck inner member11and the first chuck outer member12are close to each other, that is, the first chuck member1is closed, the first chuck inner member11and the first chuck outer member12are positioned with respect to the terminal TA. At this time, the pressure of the driving air supplied to the air cylinder13is set so that a chuck force is less than a value at which the terminal TA is not deformed. This reduces the possibility that the first chuck inner member11and the first chuck outer member12deform the terminal TA. Although only the left portion of the chuck device with the guide shown in each ofFIG. 7andFIG. 10has been described, the second chuck inner member11B and the second chuck outer member12B are positioned with respect to the terminal TB in the same manner.

Next, while the chuck device with the guide is positioned with respect to the paired terminals TA and TB, the following operations are performed. That is, the supplied trapezoidal cassette coil30is fixed to a cassette coil chuck mechanism (not shown), and fitted to the connection terminal50. The operations will be described in detail. The cassette coil30is moved toward the coil core51aby means (not shown) for moving the cassette coil30. Thus, the coil core51ais fitted into a hollow hole32of the cassette coil30. The coil terminal CA of the cassette coil30is guided into the insertion holes114and124by the guide portions113and123. The coil terminal CB is guided in the same manner. Accordingly, even when the position of the coil terminal CA varies in a vertical direction and/or in a lateral direction, the coil terminal CA is reliably guided and inserted into the insertion holes114and124by the guide portions113and123.

The position of the terminal TA varies, and the position of the coil terminal CA varies. Therefore, if the coil terminal CA tries to be simply inserted into the terminal TA, there is a high possibility that the coil terminal CA cannot be appropriately inserted into the terminal TA due to a synergistic adverse effect caused by the variation in the position of the terminal TA and the variation in the position of the coil terminal CA. However, in the chuck device with the guide according to the embodiment, the first chuck inner member11and the first chuck outer member12include the guide portions113and123that guide the coil terminal CA into the terminal TA, and the first chuck inner member11and the first chuck outer member12are positioned with respect to each terminal TA. Therefore, the guide portions113and123are positioned with respect to each terminal TA, although the position of the terminal TA varies. Thus, the synergistic adverse effect is not caused by the variation in the position of the terminal TA and the variation in the position of the coil terminal CA. Accordingly, by using the first chuck member1, it is possible to reduce the probability that the coil terminal CA cannot be appropriately inserted into the terminal TA. Similarly, by using the second chuck member2, it is possible to reduce the probability that the coil terminal CB cannot be appropriately inserted into the terminal TB. Also, when the first chuck inner member11is close to the first chuck outer member12, the elliptical insertion hole, in which the two coil wires of the coil terminal CA can be inserted, is formed by the insertion hole114and the insertion hole124. The edge of the lower portion of the insertion hole114and the edge of the lower portion of the insertion hole124extend along the shape of the terminal TA. Therefore, a gap, such as the gap74inFIG. 14B, is not formed between the edge of the lower portion of each of the insertion holes114and124and the edge of the terminal TA. This avoids the situation where the coil terminal CA is guided into a gap and interference between the coil terminal CA and the terminal TA occurs. Because interference between the coil terminal CA and the terminal TA does not occur when the coil terminal CA is inserted into the terminal TA, the coil terminal CA is smoothly inserted into the terminal TA.

Next, after the terminals TA and TB are released from the first chuck member1and the second chuck member2, respectively, the first chuck member1and the second chuck member2are moved upward. First, when the first chuck member1and the second chuck member2are in the state shown inFIG. 1, the driving air is supplied to the air cylinder13by operating the electromagnetic valve (not shown) so that the first chuck inner member11and the first chuck outer member12of the first chuck member1are moved away from each other, and the second chuck inner member11B and the second chuck outer member12B of the second chuck member2are moved away from each other. Thus, the terminals TA and TB are released from the first chuck member1and the second chuck member2, respectively, as shown inFIG. 3. At this time, the first chuck inner member11and the first chuck outer member12are moved away from each other so that there is the distance P between the first chuck inner member11and the first chuck outer member12. The second chuck inner member11B and the second chuck outer member12B are moved away from each other so that there is the distance P between the second chuck inner member11B and the second chuck outer member12B. The distance P is equal to the sum of the diameters of the two coil wires of each of the coil terminals CA and CB. When the first chuck member1and the second chuck member2are moved upward and taken out, it is necessary to avoid interference between the first chuck member1and the coil terminal CA, and interference between the second chuck member2and the coil terminal CB. Therefore, the first chuck inner member11and the first chuck outer member12need to be moved away from each other so that there is the distance P between the first chuck inner member11and the first chuck outer member12. The second chuck inner member11B and the second chuck outer member12B need to be moved away from each other so that there is the distance P between the second chuck inner member11B and the second chuck outer member12B. Each of the first chuck inner member11and the second chuck inner member11B needs to be moved a distance N shown inFIG. 2. The distance N is shorter than the diameter of one coil wire of each of the coil terminals CA and CB. Therefore, each of the first chuck inner member11and the second chuck inner member11B needs to be moved the short distance. Accordingly, even when the distance between the coil terminals CA and CB is short, a sufficient chuck stroke is ensured, that is, each of the first chuck inner member11and the second chuck inner member11B can be sufficiently moved. Thus, it is possible to make the first chuck member1and the second chuck member2close to each other.

Next, the first chuck member1and the second chuck member2, which are in the states shown inFIG. 3, are moved upward by means (not shown) for moving the first chuck member1and the second chuck member2upward and downward. Thus, the first chuck member1and the second chuck member2are brought to the states shown inFIG. 4. At this time, there is the distance P between the first chuck inner member11and the first chuck outer member12, and the distance P is equal to the sum of the diameters of the two coil wires of the coil terminal CA. Therefore, when the first chuck member1is moved upward, the insertion holes114and124do not contact the coil terminal CA. Accordingly, the first chuck member1does not deform the coil terminal CA. The second chuck member2, which is symmetric to the first chuck member1, has the same advantageous effects as the above-described advantageous effects of the first chuck member1.

Next, an index is rotated, and the coil core portion, to which the cassette coil30is fitted, is brought to a second station. In the second station, the terminals TA and TB are crimped by a crimping device (not shown) that includes upper and lower crimping dies. Thus, the terminals TA and TB are electrically connected to the coil terminals CA and CB. In the connection terminal50, first, the six trapezoidal cassette coils are fitted to every other coil core51a. Then, the six rectangular parallelepiped cassette coils are sequentially fitted to the coil cores51a. When the trapezoidal cassette coils are fitted, and when the rectangular parallelepiped cassette coils are fitted, the terminals TA and TB are positioned using the chuck device with the guide, and then, the coil terminals CA and CB are inserted into the terminals TA and TB, respectively, using the positioned guide portions.

As described above, (1) the lead wire insertion device according to the embodiment includes a pair of the first chuck member1and the second chuck member2, each of which is separable. The first chuck member1and the second chuck member2connect the coil terminals CA and CB of the cassette coil to the terminals TA and TB of the connection terminal50. The first chuck inner member11is adjacent to the second chuck inner member11B. The first chuck member1is divided into the first chuck inner member11and the first chuck outer member12at a division position, the division position is inside the both ends of the cross section of the coil terminal CA in the lateral direction of the first chuck member1, and the division position is offset from the center of the cross section of the coil terminal CA in the lateral direction of the first chuck member1. The second chuck member2is divided into the second chuck inner member11B and the second chuck outer member12B at a division position, the division position is inside the both ends of the cross section of the coil terminal CB in the lateral direction of the second chuck member2, and the division position is offset from the center of the cross section of the coil terminal CB in the lateral direction of the second chuck member2. Therefore, even when the distance between the coil terminals is short, the stroke of the first chuck inner member11of the first chuck member1and the stroke of the second chuck inner member11B of the second chuck member2are not limited, and thus, a sufficient chuck stroke is ensured. That is, the first chuck inner member11and the second chuck inner member11B can be sufficiently moved. In other words, even when the distance between the coil terminal CA and the coil terminal CB is short, it is possible to reduce the possibility that an adverse effect is caused due to the limitation of the stroke of the first chuck inner member11and the stroke of the second chuck inner member11B. Also, a gap is not formed between the edge of the lower portion of the insertion hole through which the coil terminal is inserted, and the edge of the terminal TA when the first chuck inner member11and the first chuck outer member12are close to each other. Therefore, it is possible to smoothly insert the coil terminals CA and CB into the terminals TA and TB, respectively.

(2) In the lead wire insertion device described in (1), the upper portion of the first chuck inner member11is separated from the upper portion of the first chuck outer member12at an upper division position, and the upper division position is outwardly offset from the center of the cross section of the coil terminal CA in the lateral direction of the first chuck member1. The upper portion of the second chuck inner member11B is separated from the upper portion of the second chuck outer member12B at an upper division position, and the upper division position is outwardly offset from the center of the cross section of the coil terminal CB in the lateral direction of the second chuck member2. Therefore, each of the first chuck inner member11and the second chuck inner member11B has sufficient strength, while a sufficient chuck stroke is ensured. This reduces the possibility that the coil terminal cannot be appropriately guided due to the deformation of the chuck inner member.

The invention is not limited to the above-described embodiment. Modifications may be appropriately made to a part of the configuration within the scope of the invention.