CN108780685B

CN108780685B - Electric wire processing device

Info

Publication number: CN108780685B
Application number: CN201680074044.6A
Authority: CN
Inventors: 藤田征一郎
Original assignee: Shinmaywa Industries Ltd
Current assignee: Shinmaywa Industries Ltd
Priority date: 2016-01-07
Filing date: 2016-10-25
Publication date: 2020-10-09
Anticipated expiration: 2036-10-25
Also published as: CN108780685A; JP6725537B2; JPWO2017119175A1; WO2017119175A1

Abstract

The invention provides an electric wire processing device, which can judge whether an electric wire is a defective product before twisting the electric wire, can stop twisting, can easily distinguish a processed electric wire and the defective electric wire, and can prolong the service life of the electric wire twisting device. The wire processing device is provided with: a front conveying jig (80F) and a rear conveying jig (80R) that hold the first electric wire (C1) and the second electric wire (C2) and move toward the front gripping jig section (90F) and the rear gripping jig section (90R); a front holding clamp part (90F) and a rear holding clamp part (90R) which are configured in a twisting and rotating manner; and a sensor (106) which is provided on the conveyance path of the electric wires (C1, C2) from the start of conveyance of the front conveyance jig (80F) and the rear conveyance jig (80R) to the front gripping jig section (90F) and the rear gripping jig section (90R) and detects the presence or absence of the electric wires (C1, C2).

Description

Electric wire processing device

Technical Field

The present invention relates to an electric wire processing apparatus that performs processing of an end portion of an electric wire and processing of twisting a plurality of electric wires subjected to the processing of the end portion.

Background

Conventionally, there is known an electric wire processing apparatus that executes: an end portion processing of cutting a long electric wire and peeling off a coating film at an end portion of the cut electric wire, and a processing of twisting a plurality of electric wires subjected to the end portion processing. According to such a wire processing apparatus, a stranded wire obtained by stranding a plurality of wires subjected to the end processing can be automatically and continuously manufactured.

Patent documents 1 and 2 describe a wire processing device including a wire end processing device and a wire twisting device, wherein the wire end processing device includes: the wire twisting device is provided with a cutting blade for cutting a long wire to produce a first wire having a predetermined length, a peeling blade for peeling off a coating at an end of the first wire, a cutting blade for cutting a long wire to produce a second wire having a predetermined length, and a peeling blade for peeling off a coating at an end of the second wire, and twists the first and second wires having their coatings peeled off at the ends. The first and second electric wires whose end portions have been processed by the electric wire end processing device are transferred to the electric wire twisting device in a state of being held by a conveying jig configured to be movable. The wire twisting device includes a pair of rotating jigs for holding both ends of the first wire and the second wire.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2014-235908

Patent document 2: japanese patent laid-open publication No. Hei 10-340644

Disclosure of Invention

Technical problem to be solved

However, in the case where the electric wire handed over to the electric wire twisting device cannot be normally held by the conveying jig due to some trouble, if the twisting process is directly performed, a defective processed electric wire is generated and counted erroneously as a normal processing number. Furthermore, there is a risk of damage to the peripheral components. Therefore, there is a risk that the life of the wire stranding device is shortened and the above-described defective processed wire is mixed into the acceptable processed wire.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electric wire processing apparatus capable of determining whether an electric wire is defective before twisting the electric wire, stopping twisting, easily distinguishing between a processed electric wire and a defective electric wire, and extending the life of the electric wire twisting apparatus.

(II) technical scheme

The wire processing device of the present invention comprises: a first conveying jig configured to receive one end of the end-processed electric wires and to be movable in a direction intersecting a longitudinal direction of the electric wires while holding the electric wires; a second conveying jig configured to receive the other end portions of the plurality of electric wires and to be movable in a direction intersecting with a longitudinal direction of the electric wires while holding the plurality of electric wires; a first holding jig section for holding one end of the plurality of electric wires transferred from the first conveying jig; and a second holding jig part that holds the other end parts of the plurality of electric wires transferred from the second conveying jig. At least one of the first and second gripping jig parts is configured to be rotatable to twist the plurality of electric wires. The electric wire processing apparatus further includes a detector provided on a conveying path of the plurality of electric wires from the start of conveying the plurality of electric wires by the first conveying jig and the second conveying jig to the transfer of the plurality of electric wires to the first gripping jig part and the second gripping jig part, and detecting presence/absence of the plurality of electric wires.

According to the electric wire processing apparatus of the present invention, the detector for detecting the presence or absence of the plurality of electric wires is provided on the conveying path of the plurality of electric wires conveyed by the first conveying jig and the second conveying jig. This makes it possible to detect whether the number of electric wires delivered to the first gripping jig part and the second gripping jig part is insufficient. Therefore, before the electric wire is twisted, it is possible to determine whether or not the electric wire after the twisting is a defective product. Thus, the processed electric wire and the defective electric wire can be easily distinguished, and the possibility of the defective electric wire being mixed into the defective processed electric wire is reduced. In addition, the twisting process may be stopped according to the above determination. This prevents a load from being applied to the gripping jig, and thus the life of the electric wire twisting device can be extended.

According to a preferred aspect of the present invention, the detector is configured to detect the presence or absence of the plurality of wires based on the number of times the plurality of wires pass through the detector.

A plurality of wires each traverse the detector during transport. According to the above aspect, the detector detects the presence or absence of the plurality of wires based on the number of times the plurality of wires pass through the detector. In this case, if the total value of the number of passes is smaller than the preset number of passes, it can be determined that the electric wire is not normally conveyed. For example, when two wires are conveyed, if the total number of passes is less than two, it can be determined that the wires are not conveyed normally.

According to another preferred embodiment of the present invention, the detector is configured to detect the presence or absence of the plurality of wires based on a passage time of the plurality of wires with respect to the detector.

When a plurality of electric wires are conveyed, the plurality of electric wires may be conveyed as an integral body in appearance without a space between the electric wires. According to the above aspect, the detector detects the presence or absence of the plurality of wires based on the passage time of the plurality of wires with respect to the detector. Therefore, even if it is difficult to determine the number of passes because the wires do not have a space therebetween, the feeding state of the plurality of wires can be appropriately grasped. Specifically, in the case where the detector is configured by a non-contact sensor such as a photosensor (japanese: フォトマイクロセンサ), the time for receiving the reflected light from the plurality of wires in contact with each other is longer than the time for receiving the reflected light from one of the plurality of wires that are not in contact with each other. In the case where the detector is formed of a touch sensor, the time during which the touch sensor is in contact with the plurality of electric wires in a state of being in contact with each other is longer than the time during which the touch sensor is in contact with one of the plurality of electric wires that are not in contact with each other. The presence or absence of the plurality of electric wires can be detected by using such a principle.

According to another preferred embodiment of the present invention, the detector is configured to detect the presence or absence of the plurality of electric wires handed over to the first gripping jig part and the second gripping jig part.

According to the above aspect, the detector detects the presence or absence of the plurality of electric wires at the final position of the conveyance path. Therefore, it is possible to more accurately detect whether the number of electric wires to be transferred to the first gripping jig part and the second gripping jig part is insufficient.

According to another preferred mode of the invention, the detector is a non-contact sensor.

According to the mode, the plurality of electric wires are not damaged during detection.

According to a preferred aspect of the present invention, the electric wire twisting device further includes a control unit configured to stop twisting operation by the first gripping jig unit and the second gripping jig unit when at least one of the plurality of electric wires is not detected by the detector.

According to the above aspect, it is possible to detect that the electric wire is not normally conveyed before the twisting process is performed, and prevent the occurrence of a twisting failure. This facilitates post-processing of the wire detected as abnormal. Further, it is possible to prevent a load from being applied to the first gripping jig part and the second gripping jig part.

According to another preferred aspect of the present invention, the electric wires subjected to the end portion processing each have a core wire and a coating covering the periphery of the core wire, and the electric wire processing apparatus includes a cutting mechanism that cuts the coating and the core wire of the detected electric wire when at least one of the plurality of electric wires is detected by the detector and at least another one of the plurality of electric wires is not detected.

According to the above aspect, the electric wire that is not a twisting target can be cut by the cutting mechanism, and the electric wire can be easily separated as a defective product from the discharged non-defective processed electric wire.

(III) advantageous effects

According to the present invention, it is possible to provide an electric wire processing apparatus capable of determining whether or not an electric wire is defective before twisting the electric wire, stopping the twisting process, easily distinguishing a processed electric wire and a defective electric wire, and extending the life of the electric wire twisting apparatus.

Drawings

Fig. 1 is a plan view schematically showing the structure of the electric wire processing apparatus.

Fig. 2 is a view schematically showing the structure of the holding jig.

Fig. 3 is a perspective view schematically showing the structure of the alignment jig.

Fig. 4 is a front view schematically showing the structure of the alignment jig.

Fig. 5 is a view schematically showing the structure of the front conveyance jig.

Fig. 6 is a diagram schematically showing a configuration in which the first wire and the second wire conveyed by the front conveyance jig traverse the sensor.

Fig. 7 is a block diagram showing a control system of the electric wire processing apparatus.

Fig. 8 is a view schematically showing the structure of the front grip clamp portion, in which (a) shows a state where the grip arm is opened and (b) shows a state where the grip arm is closed.

Fig. 9 is a diagram schematically showing a stranded wire.

Fig. 10 (a) is a diagram showing a structure of the cutting mechanism, (b) is a diagram showing a state where a cutter of the cutting mechanism is lowered, and (c) is a partially enlarged view of the cutting mechanism of (a).

Fig. 11 (a) and (b) are explanatory views showing another embodiment in which the first electric wire and the second electric wire are detected by the sensor.

Detailed Description

Fig. 1 is a plan view showing a configuration of an electric wire processing apparatus 1 according to an embodiment of the present invention. In the following description, unless otherwise specified, the lower, upper, left, and right in fig. 1 will be referred to as front, rear, left, and right, respectively. Therefore, the lower side and the upper side in fig. 1 are the front side and the rear side, respectively. The wire processing apparatus 1 is an apparatus for automatically and continuously manufacturing a twisted wire in which two wires having a predetermined length are twisted from two long wires. The wire processing device 1 includes: a wire end processing device 2 for processing the end of the wire, and a wire twisting device 3 for twisting the two wires processed by the wire end processing device 2.

The wire end processing apparatus 2 performs a cutting process, a stripping process, and a terminal crimping process on the first wire C1 and the second wire C2. The wire end processing device 2 includes: the wire feeder includes a first pre-feeder 11 having a wire feeder 13 for feeding the first long wire C1 forward, and a second pre-feeder 21 having a wire feeder 23 for feeding the second long wire C2 forward. The wire end processing device 2 includes: a first front clamp 14 holding a first wire C1, and a second front clamp 24 holding a second wire C2. The first front jig 14 and the second front jig 24 are configured to be movable forward and backward, and are appropriately moved forward and backward during the peeling process and the terminal crimping process. The first front jig 14 and the second front jig 24 are attached to the front jig support 30. The wire end processing device 2 includes: a rail 31 on which the front jig holder 30 is engaged, and an actuator 32 such as a motor for moving the front jig holder 30 on the rail 31. The rail 31 extends in the left-right direction, and the front jig holder 30 is configured to be movable in the left and right directions. The wire end processing device 2 further includes: a cutting blade 33 for cutting the first wire C1 and the second wire C2, and a front peeling blade 34 and a rear peeling blade 35 for peeling off the coating of the first wire C1 and the coating of the second wire C2. The wire feeder 5 is provided behind the cutting blade 33, and feeds the first wire C1 held by the first front gripper 14 or the second wire C2 held by the second front gripper 24 forward or backward.

The wire end processing device 2 further includes a rear jig 36 for holding one of the first wire C1 and the second wire C2. The rear jig 36 is configured to be movable forward and backward, and is moved forward and backward as appropriate during the cutting process and the peeling process. The rear jig 36 is mounted to the rear jig holder 37. The wire end processing device 2 includes: a rail 38 on which the rear clip holder 37 is engaged, and an actuator 39 such as a motor that moves the rear clip holder 37 on the rail 38. The rails 38 extend in the left-right direction, and the rear jig holder 37 is configured to be movable in the left and right directions. The wire end processing device 2 further includes: a front terminal crimping unit 40 and a rear terminal crimping unit 41. The terminal T is crimped to the first electric wire C1 held by the first front clamp 14 by the front terminal crimping unit 40. In addition, the terminal T is crimped to the second electric wire C2 held by the second front clamp 24 by the front terminal crimping unit 40.

As shown in fig. 1, the wire end processing device 2 includes a discharge jig 42, and the discharge jig 42 discharges the first wire C1 and the second wire C2 subjected to the cutting process and the like from the wire end processing device 2. The discharge jig 42 is configured to be movable along a rail 43. The wire processing apparatus 1 further includes an intermediate jig 50, and the intermediate jig 50 sends the first wire C1 and the second wire C2 from the wire end processing apparatus 2 to the wire stranding apparatus 3. The intermediate jig 50 is configured to be movable along a rail 51.

The wire stranding apparatus 3 performs a process of aligning the first wire C1 and the second wire C2 and a process of stranding the first wire C1 and the second wire C2. The wire stranding device 3 includes a holding jig 60 that simultaneously holds the first wire C1 and the second wire C2. The holding jig 60 is configured to be able to simultaneously hold the rear end portions of the first wire C1 and the second wire C2. As shown in fig. 2, the holding jig 60 includes: the jig includes a jig main body 63, a first clamping plate 61 slidably provided to the jig main body 63, and a second clamping plate 62 slidably provided to the jig main body 63. The jig main body 63 has: a bottom wall 63a, a first side wall 63b extending upward from the bottom wall 63a, a second side wall 63c, and a middle wall 63 d.

The first holding plate 61 is fixed to a first rod 66, and the first rod 66 is slidably inserted into the first side wall 63 b. The second holding plate 62 is fixed to a second rod 67, and the second rod 67 is slidably inserted into the second side wall 63 c. The first holding plate 61 and the second holding plate 62 are configured to be slidable so as to be able to approach and separate from the intermediate wall 63 d. The holding jig 60 has: a cylinder 64 connected to the first rod 66, and a cylinder 65 connected to the second rod 67. The first clamp plate 61 and the first rod 66 are slidably driven by the cylinder 64, and the second clamp plate 62 and the second rod 67 are slidably driven by the cylinder 65. The first electric wire C1 is clamped by the first clamping plate 61 and the intermediate wall 63d, thereby holding the first electric wire C1 to the holding jig 60. The second electric wire C2 is clamped by the second clamping plate 62 and the intermediate wall 63d, thereby holding the second electric wire C2 to the holding jig 60. The jig main body 63 can move up and down. The jig main body 63 is supported on the base 120 so as to be able to be lifted and lowered. The base 120 is provided with an operating cylinder 121 for raising and lowering the jig main body 63. The holding jig 60 is configured to be movable forward and backward. The holding jig 60 receives the first wire C1 and the second wire C2 from the intermediate jig 50 and moves forward.

The wire twisting device 3 includes an alignment jig 70, and the alignment jig 70 aligns the first wire C1 and the second wire C2 held by the holding jig 60 in parallel. The alignment jig 70 can move forward and backward along rails 71 extending in the forward and backward direction. As shown in fig. 3 and 4, the alignment jig 70 includes: a slider 72 slidably supported by the rail 71, a jig main body 73 supported by the slider 72, and an inclined table 74 disposed on the rear side of the jig main body 73. The inclined table 74 has an inclined surface 74a formed by a curved surface inclined rearward and obliquely downward. A partition plate 75 is fixed to a front end portion of the upper surface 73a of the jig main body 73. A first alignment arm 76 and a second alignment arm 77 are disposed on the front surface 73b of the jig main body 73. The first alignment arm 76 and the second alignment arm 77 are supported by the jig main body 73 via a rotation shaft 78, and are configured to be rotatable about the rotation shaft 78. A first registration roller 76a is attached to a distal end portion of the first registration arm 76, and a second registration roller 77a is attached to a distal end portion of the second registration arm 77. The first alignment arm 76 and the second alignment arm 77 rotate, and thereby the first alignment roller 76a and the second alignment roller 77a move in a direction approaching and separating from the partition plate 75. As shown in fig. 4, the jig main body 73 is provided with an operating cylinder 79 connected to the first alignment arm 76 and the second alignment arm 77. The cylinder 79 rotates the first alignment arm 76 and the second alignment arm 77. The slider 72 is connected to the motor 69 via a driving mechanism not shown. The motor 69 drives the slider 72 along the rail 71. By the first registration roller 76a approaching the partition plate 75, the first registration roller 76a and the partition plate 75 sandwich the first electric wire C1 and hold the first electric wire C1. By the second registration roller 77a approaching the partition plate 75, the second registration roller 77a and the partition plate 75 sandwich the second wire C2 and hold the second wire C2. The alignment jig 70 holds the first wire C1 and the second wire C2 when positioned at the rear end 71a (see fig. 1) of the rail 71, and moves forward while holding the first wire C1 and the second wire C2. Thereby, the first wire C1 and the second wire C2 are arranged in parallel.

As shown in fig. 1, the electric wire twisting device 3 includes: a front conveyance jig 80F capable of simultaneously holding the front end portions of the first wire C1 and the second wire C2, and a rear conveyance jig 80R capable of simultaneously holding the rear end portions of the first wire C1 and the second wire C2. The front conveyance jig 80F is engaged with a rail 81F extending in the left-right direction, and is configured to be movable in the left-right direction. The rear conveyance jig 80R is engaged with a rail 81R extending in the left-right direction, and is configured to be movable in the left-right direction. The details of the front conveyance jig 80F and the rear conveyance jig 80R will be described later.

Here, the electric wire processing apparatus 1 includes the sensor 106, and the sensor 106 detects the presence or absence of the first electric wire C1 and the second electric wire C2. Although described in detail later, the first wire C1 and the second wire C2 are conveyed to a front gripping jig 90F and a rear gripping jig 90R, which will be described later, by the front conveying jig 80F and the rear conveying jig 80R. The sensor 106 is provided in the middle of the conveyance path of the first wire C1 and the second wire C2. The sensor 106 is fixed by an instrument not shown. As the sensor 106, a non-contact sensor that detects the presence or absence of the electric wires C1 and C2 without contacting the first electric wire C1 and the second electric wire C2, or a contact sensor that detects the presence or absence of the electric wires C1 and C2 by contacting the first electric wire C1 and the second electric wire C2 may be used. In the present embodiment, a noncontact sensor is used as the sensor 106. Specifically, as the sensor 106, for example, an optical micro sensor, a photoelectric sensor, a laser sensor, an ultrasonic sensor, an imaging sensor, a line sensor, a proximity sensor, or the like can be used. From the viewpoint of being relatively economical and occupying less space for installation, an optical micro sensor (e.g., a reflection type) may be suitably used. In the case where the optical micro sensor is used as the sensor 106, the presence or absence of the first wire C1 and the second wire C2 can be detected by detecting the amount of light reflected by the first wire C1 and the second wire C2. When the sensor 106 detects the light irradiated to and reflected from the first electric wire C1 by the sensor 106, the output signal of the sensor 106 is ON (ON). On the other hand, when the sensor 106 does not detect the reflected light, the output signal of the sensor 106 is OFF (OFF). For example, in the case where only the first electric wire C1 is conveyed due to some failure, the number of times of the ON signal output by the sensor 106 is one. When both the first wire C1 and the second wire C2 are appropriately fed, the number of times of the ON (ON) signal output by the sensor 106 is two. In this way, the presence or absence of the first wire C1 and the second wire C2 can be detected based on the number of times the first wire C1 and the second wire C2 pass the sensor 106. The passage of the first wire C1 and the second wire C2 with respect to the sensor 106 means: the first wire C1 and the second wire C2 pass within the detection zone of the sensor 106. In the case of using, for example, an optical micro-sensor as the sensor 106, the above-mentioned passage means: passes in the range of light emitted from the light micro sensor. In order to detect the presence or absence of the first wire C1 and the second wire C2 based on the number of passes, the first wire C1 and the second wire C2 may be conveyed with a gap between them by the front conveyance jig 80F and the rear conveyance jig 80R. Further, the sensor 106 is not limited to the use of an optical micro sensor.

As shown in fig. 1, the sensor 106 is provided between the rail 71 and a rail 102 described later in a plan view. The sensor 106 is disposed between the

rails

81F and 81R in a plan view. The sensor 106 is provided between the front conveying jig 80F and the rear conveying jig 80R in a plan view. The sensor 106 is located further rearward than the front conveying jig 80F. In a plan view, the sensor 106 is provided between the front conveying

jig

80F and 1/4 which is the distance between the front conveying jig 80F and the rear conveying jig 80R. As shown in fig. 9, the stranded wire CT has one end CT1 closest to the front grip clamp portion 90F in a portion where the first wire C1 contacts the second wire C2. The sensor 106 may be disposed at a position closer to the front grip clamp portion 90F than the one end CT 1. This is due to: if the center portions of the first wire C1 and the second wire C2 contact each other during conveyance, there may be a case where no space is generated between the first wire C1 and the second wire C2 in the center portions. By disposing the sensor 106 at a position closer to the front grip clamp portion 90F than the one end CT1, the sensor 106 can be disposed in a region where the above-described interval can be secured. As shown in fig. 1, the sensor 106 is provided at a position closer to the front grip portion 90F and the rear grip portion 90R than the middle of the conveyance path through which the first wire C1 and the second wire C2 are conveyed by the front conveyance jig 80F and the rear conveyance jig 80R. As shown in fig. 6, the sensor 106 is disposed at a position higher than the first wire C1 and the second wire C2 conveyed by the front conveying jig 80F. The sensor 106 is disposed at a position higher than a pair of first and second

gripping arms

85a and 85b of the front conveyance jig 80F, which will be described later.

As shown in fig. 5, the front conveyance jig 80F includes: a slider 82 engaging with the rail 81F, a jig main body 83 supported by the slider 82 so as to be able to move up and down, a clamp arm 85 supported by the jig main body 83 so as to be able to rotate via a rotation shaft 84, and an intermediate wall 83 a. The clamp arm 85 is composed of a first clamp arm 85a and a second clamp arm 85b provided on a side of the first clamp arm 85 a. The front conveyance jig 80F has an operating cylinder 86 connected to the clamp arm 85. The

clamp arms

85a and 85b are rotated about the rotation shaft 84 by the driving force of the cylinder 86. The intermediate wall 83a is disposed between the first gripper arm 85a and the second gripper arm 85 b. The height of the lower end of the intermediate wall 83a, the height of the lower end of the first clamp arm 85a, and the height of the lower end of the second clamp arm 85b are substantially the same. The first electric wire C1 is held by the first holding arm 85a and the intermediate wall 83a by the first holding arm 85a being rotated toward the intermediate wall 83a (counterclockwise in fig. 5). Similarly, the second electric wire C2 is held between the second holding arm 85b and the intermediate wall 83a by the second holding arm 85b being rotated toward the intermediate wall 83a (clockwise in fig. 5). In this way, by providing the intermediate wall 83a between the first and second

gripping arms

85a and 85b, the first and second electric wires C1 and C2 are in a state of not contacting each other when the first and second electric wires C1 and C2 are held, respectively. This can generate a space between the first wire C1 and the second wire C2. The first wire C1 and the second wire C2 are simultaneously held by the front conveying jig 80F. The front conveyance jig 80F has an operating cylinder 87 connected to the jig main body 83. The jig main body 83 is lifted and lowered by the driving force of the cylinder 87. The slider 82 is coupled to the operating cylinder 88 by a drive mechanism, not shown, and is configured to be movable along the rail 81F. The operating cylinder 88 drives the slider 82 along the rail 81F. The rear conveying jig 80R has the same configuration as the front conveying jig 80F, and therefore, detailed description thereof is omitted. However, the slider 82 of the rear conveyance jig 80R engages with the rail 81R (see fig. 1), and moves along the rail 81R by receiving the driving force of the cylinder 88.

As shown in fig. 6, the front conveyance jig 80F moves in the direction of arrow D2 along the rail 81F while holding the first wire C1 and the second wire C2. Thereby, the first wire C1 and the second wire C2 are fed in the direction D1 perpendicular to the longitudinal direction of the first wire C1 and the second wire C2, respectively. As described above, the sensor 106 is disposed at the position behind the front conveyance jig 80F and at the position higher than the first wire C1 and the second wire C2 during conveyance, and therefore does not hinder the movement of the front conveyance jig 80F. The presence or absence of the first wire C1 and the second wire C2 is detected by the sensor 106 in a state where they are spaced apart from each other.

As shown in fig. 1, the electric wire processing apparatus 1 includes a control device 200. The configuration of the control device 200 is not particularly limited, and may be a computer provided with a CPU, a RAM, a ROM, and the like, for example. When at least one of the first wire C1 and the second wire C2 is not detected by the sensor 106, the control device 200 stops the twisting operation by the front grip 90F and the rear grip 90R. In this case, as shown in fig. 7, the control device 200 stops the operation of the actuator 98 and the operation of the motor 99 based on the detection result of the sensor 106. This can avoid twisting only one electric wire.

Here, as shown in (a) and (b) of fig. 10, the electric wire processing apparatus 1 includes a cutting mechanism 130. Fig. 10 (a) and (b) are diagrams showing the structure of the cutting mechanism 130 when viewed from the front and the rear. When one of the first wire C1 and the second wire C2 is not detected by the sensor 106 (see fig. 6), the cutting mechanism 130 cuts the detected one of the wires as an unqualified wire. The cutting mechanism 130 is provided at a position P2 above an end point P1 (see fig. 6) of a conveyance path of the first wire C1 and the second wire C2, which will be described later. Thus, the one of the first electric wire C1 and the second electric wire C2 that is detected is cut by the cutting mechanism 130 while being gripped by the front grip clamp 90F and the rear grip clamp 90R. Such a cutting mechanism 130 includes: the cutter 131, a cutter cover 132 provided near the cutter 131, a support 133 connected to the cutter 131 and the cutter cover 132, and a pneumatic cylinder 134 for raising and lowering the support 133. Instead of the pneumatic cylinder 134, another driving source such as a hydraulic cylinder may be used. The cutter 131 is configured to be lifted and lowered, and cuts a portion of the electric wire where the coating 152 (see fig. 9) is provided. That is, the coating 152 and the core wire 151 of the electric wire are cut. The position of the blade 131 in the front-rear direction is not particularly limited as long as it is disposed above the portion of the wire where the coating 152 is provided. By raising and lowering the support 133 by the air cylinder 134, the cutter 131 and the cutter cover 132 are raised and lowered simultaneously. Fig. 10 (c) is an enlarged view of the region K in fig. 10 (a). As shown in fig. 10 (c), the cutter 131 has a pair of

blades

131a and 131b configured to be movable in the left-right direction. The blade 131b is disposed to the right of the blade 131 a. The blade 131a is supported by a tool support table 135a provided above the blade 131 a. The blade 131b is supported by a tool support base 135b provided above the blade 131 b. The

tool support bases

135a and 135b are coupled to an air chuck 136, and the air chuck 136 is coupled to the support 133. The air chuck 136 moves the tool support tables 135a and 135b in directions to approach and separate from each other. When the

blades

131a and 131b move in the direction of approaching each other, the electric wire is sandwiched between the

blades

131a and 131b and cut.

The tool cover 132 is formed in a thin plate shape, for example. The cutter cover 132 is disposed rearward of the cutter 131. The tool cover 132 has a notch portion 132a including a semicircular portion. The height position of the notch portion 132a is substantially the same as the height position of the cutter 131. In such a configuration, in a state where the detected electric wire is held by the front grip part 90F and the rear grip part 90R, as shown in fig. 10 (b), the cutter 131 and the cutter cover 132 are lowered by the support part 133 by the air cylinder 134. At this time, the electric wire is received in the notch portion 132a of the cutter cover 132. Thereby, the electric wire is positioned. In the state where the electric wire is positioned in this manner, the

blades

131a and 131b are moved in the direction of approaching each other by the air chuck 136. Thereby, the electric wire can be cut. Since the electric wire is received in the notch portion 132a, the electric wire is not largely moved to the left and right when cut by the

blades

131a and 131b and is kept stable. Therefore, the electric wire is easily cut. After the cutting process, when the cut electric wire is released from the front grip clamp portion 90F and the rear grip clamp portion 90R, the electric wire falls and is collected in the tray 110 (see fig. 1).

The wire twisting device 3 includes: a front grip 90F that rotates while simultaneously holding the front ends of the first wire C1 and the second wire C2, and a rear grip 90R that rotates while simultaneously holding the rear ends of the first wire C1 and the second wire C2. Since the front grip clamp portion 90F and the rear grip clamp portion 90R have the same configuration, only the configuration of the front grip clamp portion 90F will be described here. As shown in fig. 8 (a) and (b), the front gripping jig section 90F includes: the jig includes a jig main body 91, a shaft 92 slidable forward and backward (left and right in fig. 8 (a)) with respect to the jig main body 91, and a pair of clamp arms 93 attached to the shaft 92. The clamp arm 93 has: a first link 94 rotatably supported by the shaft 92 through a rotation shaft 94a, a second link 95 rotatably supported by the first link 94 through a rotation shaft 95a, and a third link 96 rotatably supported by the second link 95 through a rotation shaft 96 a. A holding portion 97 for holding the first wire C1 and the second wire C2 is provided at the tip of the third link 96. As shown in fig. 8 (a), the front gripping jig section 90F is configured to: when the shaft 92 moves rearward (rightward in fig. 8 (a)), the holding arm 93 opens to release the holding of the first wire C1 and the second wire C2. On the other hand, as shown in fig. 8 (b), the front gripping jig section 90F is configured to: when the shaft 92 moves forward (leftward in fig. 8 (b)), the clamp arm 93 closes to hold the first wire C1 and the second wire C2. An actuator 98 for sliding the shaft 92 is coupled to the shaft 92. A motor 99 is connected to the front grip clamp portion 90F, and the motor 99 rotates the front grip clamp portion 90F around the rotation center axis 90 c. The front grip clamp portion 90F simultaneously holds the front end portions of the first and second electric wires C1 and C2 and rotates about the rotation center axis 90C, and the rear grip clamp portion 90R simultaneously holds the rear end portions of the first and second electric wires C1 and C2 and rotates about the rotation center axis 90C, thereby twisting the first and second electric wires C1 and C2.

As shown in fig. 1, a slider 101 is fixed to the front grip clamp portion 90F. The slider 101 is engaged with a rail 102 extending in the front-rear direction, and is configured to be able to travel on the rail 102. A motor 103 is coupled to the slider 101, and the motor 103 drives the slider 101 to travel on the rail 102. When the slider 101 moves forward, the front gripping jig 90F moves forward, and when the slider 101 moves backward, the front gripping jig 90F moves backward. A tray 110 for collecting the stranded electric wires (i.e., the electric wires stranded by the first electric wire C1 and the second electric wire C2) is disposed below the front grip part 90F and the rear grip part 90R. When the front grip clamp portion 90F and the rear grip clamp portion 90R release the stranded wires, the stranded wires fall down and are collected in the tray 110.

As shown in fig. 9, the electric wire processing apparatus 1 manufactures a stranded electric wire CT in which a first electric wire C1 and a second electric wire C2 to which terminals T are crimped at both ends are stranded. The first wire C1 and the second wire C2 have: a core wire 151, and a coating 152 covering the periphery of the core wire 151. The core wire 151 is made of a conductor such as a metal, and the coating 152 is made of an insulating material such as a polyethylene resin. The front-rear positions of the front feed jig 80F and the front grip jig 90F are adjusted according to the lengths of the first wire C1 and the second wire C2. Specifically, when the first wire C1 and the second wire C2 are twisted, the apparent length of the twisted wires CT is shorter than the original length of the first wire C1 and the second wire C2. Therefore, the front gripping jig 90F moves backward (i.e., in a direction approaching the rear gripping jig 90R) while rotating.

As described above, according to the electric wire processing apparatus 1 of the present embodiment, the sensor 106 for detecting the presence or absence of the electric wires C1 and C2 is provided in the conveyance path from the start of conveyance of the first electric wire C1 and the second electric wire C2 by the front conveyance gripper 80F and the rear conveyance gripper 80R to the transfer of the first electric wire C1 and the second electric wire C2 to the front gripping gripper 90F and the rear gripping gripper 90R. This makes it possible to detect whether the number of electric wires delivered to the front grip portion 90F and the rear grip portion 90R is insufficient. Therefore, before the twisting process is performed on the first wire C1 and the second wire C2, it can be determined whether or not the wires are defective. This makes it possible to easily distinguish the qualified electric wire from the defective electric wire, and to reduce the possibility of the defective electric wire being mixed into the qualified electric wire. In addition, the twisting process may be stopped according to the above determination. This can prevent the

gripping jig parts

90F and 90R from being subjected to a load more than necessary, and thus can extend the life of the electric wire twisting device 3.

In the wire processing device 1 according to the present embodiment, when the sensor 106 is provided in the middle of the conveyance path of the first wire C1 and the second wire C2, the wires C1 and C2 respectively cross the sensor 106 during conveyance. Thus, the sensor 106 can detect the presence or absence of the wires C1 and C2 based on the number of times the wires C1 and C2 pass through the sensor 106.

In addition, according to the electric wire processing apparatus 1 of the present embodiment, since the non-contact sensor is used as the sensor 106, the first electric wire C1 and the second electric wire C2 are not damaged at the time of detection.

In addition, according to the electric wire processing apparatus 1 of the present embodiment, when at least one of the first electric wire C1 and the second electric wire C2 is not detected by the sensor 106, the twisting operation by the front grip clamp 90F and the rear grip clamp 90R is stopped by the control device 200. Thus, it is possible to detect that the electric wire is not normally conveyed before the twisting process is performed, and prevent the occurrence of twisting failure. This facilitates post-processing of the wire detected as the abnormality. Further, it is possible to prevent a load from being applied to the front grip portion 90F and the rear grip portion 90R.

In addition, according to the electric wire processing apparatus 1 of the present embodiment, when at least one of the first electric wire C1 and the second electric wire C2 is not detected by the sensor 106, the cutting mechanism 130 cuts the portion of the detected electric wire where the coating 152 is present. Thus, the electric wire that is not to be twisted can be easily distinguished as a defective product from the discharged non-defective processed electric wire.

While one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and can be implemented in various other embodiments.

In the above embodiment, the configuration is such that: the presence or absence of the first wire C1 and the second wire C2 is detected based on the number of times the first wire C1 and the second wire C2 pass the sensor 106, but is not limited thereto. It can also be: the presence or absence of the first wire C1 and the second wire C2 is detected based on the passage time of the first wire C1 and the second wire C2 with respect to the sensor 106. When the first wire C1 and the second wire C2 are fed, the following may occur: the first wire C1 is in contact with the second wire C2, and is conveyed as an integral piece in appearance without a space between the two wires C1 and C2. In such a case, it may be difficult to detect the presence or absence of the first wire C1 and the second wire C2 based on the number of passes. However, if the presence or absence of the first wire C1 and the second wire C2 is detected based on the passage time, even when it is difficult to determine based on the number of passages because no space is left between the first wire C1 and the second wire C2, the detection can be performed satisfactorily.

Instead of detecting the presence or absence of the electric wires C1 and C2 based on the number of passes or the passage time of the first electric wire C1 and the second electric wire C2 with respect to the sensor 106, the electric wires transferred to the front grip 90F and the rear grip 90R, that is, the electric wires in the stopped state may be detected by the sensor 106. In this case, as shown in fig. 6, the sensor 106 may be provided at a position P2 above the end point P1 of the conveyance path of the first wire C1 and the second wire C2. With this configuration, the presence or absence of the first wire C1 and the second wire C2 can be detected after the conveyance is completed.

In the above embodiment, the sensor 106 is provided between the front conveying

jig

80F and 1/4, which is the distance between the front conveying jig 80F and the rear conveying jig 80R in a plan view, but the present invention is not limited thereto. For example, the sensor 106 may be provided between the rear conveying

jig

80R and 1/4 of the distance described above.

In the above-described embodiment, the optical micro sensor, the photoelectric sensor, the laser sensor, the ultrasonic sensor, the proximity sensor, and the like are exemplified as the sensor 106, but other sensors different from these sensors may be used.

In the above embodiment, one sensor 106 is provided, but two or more sensors 106 may be provided.

In the above embodiment, the following configuration may be provided: when the presence of one of the first wire C1 and the second wire C2 is not detected by the sensor 106, the wire is collected as a defective product in a tray different from the tray 110.

In the above embodiment, the jig main body 83 is provided with the intermediate wall 83a, but the present invention is not limited thereto. When the first wire C1 and the second wire C2 can be conveyed by the front conveyance jig 80F and the rear conveyance jig 80R in a state where the first wire C1 and the second wire C2 are spaced apart from each other, the intermediate wall 83a is not an essential element. As shown in fig. 11 (a), even when the first wire C1 and the second wire C2 are conveyed in a state of being partially overlapped in the vertical direction (that is, when there is no gap between the first wire C1 and the second wire C2 in the horizontal direction), the intermediate wall 83a is not an essential element when the presence or absence of the first wire C1 and the second wire C2 can be detected by the sensor 106. Further, as shown in fig. 11 (b), when the sensor 106 is configured by an optical micro sensor or the like in the case where the first wire C1 and the second wire C2 are conveyed in a state where they are all overlapped in the vertical direction, it is difficult to detect the presence or absence of the first wire C1 and the second wire C2. Therefore, a sensor 107, which is a proximity sensor, for example, may be provided in addition to the sensor 106. In this case, the sensor 107 is provided, for example, on the downstream side of the conveyance of the first wire C1 and the second wire C2.

In the above embodiment, two electric wires, i.e., the first electric wire C1 and the second electric wire C2, are held at the same time, and the presence or absence of the electric wire is detected by the sensor 106 while being conveyed to the front grip 90F and the rear grip 90R.

In the above embodiment, the present invention includes: a front grip part 90F which rotates while simultaneously holding the front end parts of the first wire C1 and the second wire C2, and a rear grip part 90R which rotates while simultaneously holding the rear end parts of the first wire C1 and the second wire C2. However, the first wire C1 and the second wire C2 may be held by separate jigs on at least one of the jigs and driven to rotate and revolve.

Description of the reference numerals

1-an electric wire processing device; 3-a wire stranding device; 80F-front transport gripper (first transport gripper); 80R-rear conveying jig (second conveying jig); 90F-front holding clamp part (first holding clamp part); 90R-rear grip clamp portion (second grip clamp portion); 106-sensor (detector); 200-control means (control section); c1 — first wire; c2-second wire.

Claims

1. An electric wire processing device is provided with:

a first conveying jig configured to receive one end of the end-processed electric wires and to be movable in a direction intersecting a longitudinal direction of the electric wires while holding the electric wires;

a second conveying jig configured to receive the other end portions of the plurality of electric wires and to be movable in a direction intersecting with a longitudinal direction of the electric wires while holding the plurality of electric wires;

a first holding jig section for holding one end of the plurality of electric wires transferred from the first conveying jig; and

a second holding jig part for holding the other end parts of the plurality of electric wires transferred from the second conveying jig,

the plurality of electric wires each have a core wire and a coating film covering the periphery of the core wire,

at least one of the first and second gripping jig parts is configured to be rotatable to twist the plurality of electric wires,

the wire processing apparatus further includes a detector provided on a conveying path of the plurality of wires from the start of conveying the plurality of wires by the first conveying jig and the second conveying jig to the transfer of the plurality of wires to the first gripping jig part and the second gripping jig part, and configured to detect the presence or absence of the plurality of wires before the plurality of wires are twisted.

2. The electric wire processing apparatus according to claim 1, wherein the detector is configured to detect the presence or absence of the plurality of electric wires based on the number of times the plurality of electric wires pass through the detector.

3. The electric wire processing apparatus according to claim 1, wherein the detector is configured to detect the presence or absence of the plurality of electric wires based on a passage time of the plurality of electric wires with respect to the detector.

4. The electric wire processing apparatus according to claim 1, wherein the detector is configured to detect presence or absence of the plurality of electric wires handed over to the first gripping jig part and the second gripping jig part.

5. The wire processing apparatus of claim 1 wherein the detector is a non-contact sensor.

6. The electric wire processing device according to claim 1, further comprising a control unit that stops the twisting operation by the first gripping jig unit and the second gripping jig unit when at least one of the plurality of electric wires is not detected by the detector.

7. The electric wire processing apparatus according to claim 1,

the wire processing apparatus includes a cutting mechanism that cuts the coating and the core wire of the detected wire when at least one of the plurality of wires is detected and at least another one of the plurality of wires is not detected by the detector.