CN115084971A - Electric wire processing device - Google Patents

Abstract

An electric wire processing device is provided, which can restrain the damage of the electric wire and the excessive feeding of the electric wire when the electric wire is conveyed. The wire processing device is provided with: a conveying device for conveying the electric wire along the length direction; a tensioner which is arranged on the upstream side of the conveying device in the electric wire conveying direction and applies tension to the electric wire conveyed by the conveying device; and a control device for controlling the conveying device. The control device is provided with a conveying control part for controlling the conveying device to repeat the conveying and stopping of the electric wire. The tensioner is provided with: a tension applying member provided on one side of the wire conveying path and contacting the wire; a pressing mechanism for applying a force to the tension applying member toward the other side of the wire conveying path and pressing the wire to the other side via the tension applying member; and a resistance applying mechanism provided on the other side of the wire feeding path toward the tension applying member. The resistance applying mechanism includes a first roller, a second roller, and an endless first belt. The first tape is wound around the first roller and the second roller, and contacts the electric wire at least when the tension applying member presses the electric wire.

Description

Electric wire processing device

Technical Field

The present invention relates to an electric wire processing apparatus.

Background

Conventionally, there is known a wire processing apparatus which performs a process of cutting a wire to a predetermined length, a process of peeling a coating material of an end portion of the wire, and a process of crimping a crimp terminal to the end portion of the wire from which the coating material is peeled. For example, patent document 1 discloses an electric wire processing apparatus including: the wire-cutting device includes a feeding device for feeding an electric wire, a length measuring mechanism for measuring a feeding distance of the electric wire, a jig for gripping the electric wire, a cutter unit for cutting the electric wire and peeling off a coating material, and a terminal crimping unit. In the electric wire processing apparatus disclosed in patent document 1, in order to continuously produce an electric wire cut to a predetermined length, the feeding device stops feeding the electric wire when the predetermined length is fed, and the cutter unit cuts the electric wire when the electric wire is stopped. The length measuring mechanism measures the conveying distance of the electric wire.

The electric wire processing device disclosed in patent document 1 includes a mechanism for preventing the electric wire from being excessively fed out by inertia even after the feeding distance of the electric wire reaches a predetermined distance and the feeding of the electric wire is stopped. The length measuring mechanism of the electric wire processing apparatus disclosed in patent document 1 includes a driven roller that does not rotate more than a predetermined angle. After the driven roller is stopped, the electric wire is conveyed while slipping with respect to the driven roller. According to patent document 1, the excessive feeding of the electric wire due to inertia can be prevented effectively in this way.

In a typical conventional electric wire processing apparatus, a tensioner for applying tension to an electric wire on the upstream side of a conveyor is used in order to suppress excessive feeding of the electric wire due to inertia. Fig. 5 is a schematic diagram showing a partial structure of a conventional electric wire processing apparatus. As shown in fig. 5, an example of the conventional wire processing apparatus includes a tension roller 150 disposed laterally to the wire 5. The tension roller 150 presses the electric wire 5 in a direction (C direction in fig. 5) intersecting the conveying direction (left-right direction in fig. 5) of the electric wire 5. The tension roller 150 presses the electric wire 5 in the C direction, thereby applying tension to the electric wire 5. Thereby, as shown by the two-dot chain line in fig. 5, the electric wire 5 is conveyed without slack. The tension roller 150 is configured to rotate in the wire feeding direction (direction D in fig. 5). However, in the wire processing apparatus shown in fig. 5, when the feeding device 20 stops the feeding of the wire 5, the wire 5 is excessively fed by the inertia of the tension roller 150 and the wire 5 itself as shown by the solid line in fig. 5, and tends to slacken at the downstream side of the tension roller 150. The driven roller of the electric wire processing apparatus disclosed in patent document 1 also prevents such loosening of the electric wire.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2008-4556

Disclosure of Invention

Technical problem to be solved

According to the electric wire processing apparatus disclosed in patent document 1, it is expected to prevent the electric wire from being excessively fed. However, the friction between the driven roller and the electric wire may damage the coating material of the electric wire. According to the tension roller rotating in the wire feeding direction in the typical conventional wire processing apparatus, although the possibility of damage to the coating material of the wire can be reduced, the effect of preventing the wire from being overfed is small.

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 suppressing damage to an electric wire and excessive feeding of the electric wire.

(II) technical scheme

The wire processing device of the present invention comprises: a conveying device for conveying the electric wire along the length direction of the electric wire; a tensioner that is provided upstream of the conveying device in a conveying direction of the electric wire and applies tension to the electric wire conveyed by the conveying device; and a control device that controls the conveying device. The control device includes a conveyance control unit that controls the conveyance device to repeat conveyance of the electric wire and stop conveyance. The tensioner is provided with: a tension applying member provided on one of side portions of a conveying path of the electric wire and contacting the electric wire; a pressing mechanism that presses the electric wire to the other side via the tension applying member by applying a force to the tension applying member toward the other side of the conveying path of the electric wire; and a resistance applying mechanism provided on the other side of the conveying path of the electric wire so as to face the tension applying member. The resistance applying mechanism includes a first roller, a second roller, and an endless first belt. The first tape is wound around the first roller and the second roller, and is brought into contact with the electric wire at least when the tension applying member presses the electric wire.

According to the above tensioner, the excessive feeding of the electric wire due to inertia can be suppressed by the friction between the first roller and the second roller and the first belt wound around them. The rotation of the first roller, the second roller, and the first belt is stopped by friction, so that the electric wire in contact with the first belt is quickly stopped. As a result, the excessive feeding of the electric wire is suppressed. Further, since the first tape can be operated in accordance with the operation of the electric wire when the electric wire is conveyed and when the conveyance is stopped, excessive friction is not generated between the electric wire and the first tape. Therefore, damage to the electric wire due to the first tape is suppressed. Therefore, according to the wire processing apparatus, it is possible to suppress damage to the wire and wire overfeeding.

According to a preferred embodiment of the present invention, the first roller and the second roller are arranged in parallel in a conveying direction of the electric wire. The tension applying member is disposed so as to face a portion of the first belt between the first roller and the second roller. When the tension imparting member presses the electric wire, the first tape is brought into contact with the electric wire at a portion opposite to the tension imparting member.

According to a preferred aspect of the present invention, the tension applying member includes a tension roller that rotates in a feeding direction of the electric wire and presses the electric wire.

According to a preferred aspect of the present invention, the tension applying member includes a holding member that holds the tension roller at the other end portion. The pressing mechanism includes a moving mechanism capable of moving the holding member so that the tension roller comes into contact with or separates from the electric wire.

According to a preferred aspect of the present invention, the pressing mechanism includes an elastic member provided between the holding member and the moving mechanism. The moving mechanism moves the holding member via the elastic member. The elastic member is configured to contract due to a reaction force of the electric wire when the tension roller presses the electric wire.

According to a preferred aspect of the present invention, the resistance applying mechanism includes a roller moving unit that is capable of changing a distance between the first roller and the second roller by moving at least one of the first roller and the second roller.

According to a preferred aspect of the present invention, the first roller and the second roller are rotated in a driven manner, because the electric wire is conveyed by the conveying device and the first belt is rotated by the conveyance of the electric wire.

According to a preferred aspect of the present invention, the tensioner is provided with neither a drive unit for rotating the first roller nor a drive unit for rotating the second roller.

According to a preferred embodiment of the present invention, the wire processing apparatus further includes a cutting device for cutting the wire. The conveyance control unit controls the conveyance device and sets the conveyance device to stop conveyance when the electric wire is conveyed a predetermined distance. The control device includes a cutting control unit that causes the cutting device to cut the electric wire each time the conveyance of the electric wire is stopped.

According to a preferred aspect of the present invention, the tension applying member includes a third roller, a fourth roller, and a second belt that is looped and wound around the third roller and the fourth roller. At least one of the third roller and the fourth roller is configured to press the electric wire through the second belt when the pressing mechanism applies a force to the tension applying member.

(III) advantageous effects

According to the electric wire processing apparatus of the present invention, damage to the electric wire being conveyed and excessive feeding of the electric wire can be suppressed.

Drawings

Fig. 1 is a schematic diagram showing a configuration of an electric wire processing apparatus according to an embodiment.

Fig. 2 is a side view of the tensioner and direction-changing roller.

Fig. 3 is a partial sectional view of the tensioner as viewed from below.

Fig. 4 is a side view schematically showing the structure of a tensioner of a modification.

Fig. 5 is a schematic diagram showing a partial structure of a conventional electric wire processing apparatus.

Description of the reference numerals

1-an electric wire processing device; 5-an electric wire; 9-a control device; 20-feeding means (conveying means); 40-a cutting device; 50-a tensioner; 50A-a tension imparting member; 50B-a pressing mechanism; 50C-resistance imparting mechanism; 51-a tension roller; 52-a holding member; 54-handle (moving mechanism); 55-linkage (moving mechanism); 56-ram (moving mechanism); 57-spring (elastic member); 58A-roller (first roller); 58B-roller (second roller); 59-band (first band); 60-roller moving means (roller moving section); 70-a direction-changing roller; 91-a transport control section; 92-a cutting control part.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. Fig. 1 is a schematic diagram showing a configuration of an electric wire processing apparatus 1 according to an embodiment of the present invention. In the following description, the right and left sides in fig. 1 are referred to as the front and rear sides, respectively. Reference numeral F, Rr in the drawings denotes a front and a rear, respectively. However, in the following description, each direction is only a direction defined for convenience of description, and does not limit the present invention at all. Fig. 1 is a schematic view, and therefore, directions other than the front-rear direction do not necessarily coincide among the components of the electric wire processing apparatus 1 in fig. 1.

[ Structure of electric wire processing apparatus ]

The wire processing device 1 includes: a feeding device 20 for feeding the electric wire 5 in the longitudinal direction (extending direction), electric wire clamping devices 30F and 30R, a cutting device 40 for cutting the electric wire 5, peeling devices 41 and 42 for peeling off the coating material of the electric wire 5, crimping machines 13F and 13R, a control device 9, a tray 8, a direction changing roller 70 for turning the feeding direction of the electric wire 5 halfway, and a tensioner 50 for applying tension to the electric wire 5. The electric wire 5 is a so-called covered electric wire including a core wire made of a conductor and a covering material made of an insulator covering the periphery of the core wire.

The feeding device 20 includes a pair of driving rollers 21a and driven rollers 21b driven by a motor, not shown, and a conveyor belt 22 wound around the driving rollers 21a and the driven rollers 21 b. The drive roller 21a drives the conveyor belt 22, and the electric wire 5 sandwiched between the pair of conveyor belts 22 is fed forward. The motor not shown is, for example, a servo motor that rotates while measuring a rotation angle. However, the feeder 20 may be any device as long as it can feed the electric wire 5, and its specific configuration is not limited. The electric wire processing apparatus 1 may be provided with another length measuring device in addition to the feeding device 20 for measuring the conveying distance of the electric wire 5. Hereinafter, the front side of the feeding direction of the electric wire 5 fed by the feeding device 20 is referred to as a downstream side, and the rear side is referred to as an upstream side.

The electric wire clamping devices 30F and 30R are devices capable of gripping the electric wire 5, moving the electric wire 5 in the longitudinal direction CL (see arrow a), and rotating the electric wire 5 about the rotation shafts 30cF and 30cR (see arrow B). The first wire clamping device 30F includes a first clamp 31F that grips the wire 5, and moves the first clamp 31F in the longitudinal direction CL (in the front-rear direction in the present embodiment) of the wire 5 and rotates the first clamp 31F about a rotation shaft 30 cF. The second wire clamping device 30R includes a second gripper 31R that grips the wire 5, and moves the second gripper 31R in the longitudinal direction CL of the wire 5 and rotates the second gripper 31R about the rotation shaft 30 cR.

The cutting device 40 is provided downstream of the feeding device 20 in the feeding direction of the electric wire 5. The cutting device 40 includes a pair of cutting blades 40A disposed on both sides (on the front side and the back side of the drawing sheet in fig. 1) of the side of the moving path of the electric wire 5. The cutting device 40 cuts the electric wire 5 by driving the pair of cutting blades 40A to approach each other.

The first stripping device 41 is provided upstream of the cutting device 40 in the conveying direction of the electric wire 5, and is provided rearward. The first stripping device 41 includes a pair of stripping blades 41A disposed on both sides of the movement path of the electric wire 5. The first stripping device 41 cuts the coating material of the electric wire 5 in the circumferential direction by bringing the pair of stripping blades 41A close to each other. The second stripping device 42 is provided downstream of the cutting device 40 in the feeding direction of the electric wire 5, and is provided forward of the cutting device. The second stripping device 42 includes a pair of stripping blades 42A disposed on both sides of the moving path of the electric wire 5. The second stripping device 42 cuts the coating material of the electric wire 5 in the circumferential direction by bringing the pair of stripping blades 42A close to each other. The crimpers 13F, 13R crimp the terminal 7 to the end of the electric wire 5. The tray 8 is a box for collecting the processed electric wire 5.

The tensioner 50 and the direction-changing roller 70 are provided upstream of the feeding device 20 in the feeding direction of the electric wire 5. Fig. 2 is a side view of the tensioner 50 and the direction-changing roller 70. Fig. 3 is a partial sectional view of the tensioner 50 as viewed from below. In fig. 2 and 3, U, D, L, R represents up, down, left, and right, respectively. As shown in fig. 2, the direction switching roller 70 is provided rearward of the feeding device 20. The tensioner 50 is provided upstream of the direction of conveyance of the electric wire 5 than the direction-changing roller 70. Here, the feeding direction of the electric wire 5 is switched to the vertical direction at a position upstream of the direction switching roller 70, and the tensioner 50 is provided downward of the direction switching roller 70. The electric wire 5 may be wound in a roll shape at a position on the upstream side of the tensioner 50. However, the state of the electric wire 5 is not limited to the position on the upstream side of the tensioner 50.

The tensioner 50 applies tension to the electric wire 5 conveyed by the feeding device 20. As shown in fig. 2, the tensioner 50 includes: a tension applying member 50A provided on one of the lateral sides of the conveying path of the electric wire 5 to be conveyed, and provided forward therefrom; a pressing mechanism 50B for pressing the wire 5 rearward via the tension applying member 50A; and a resistance applying mechanism 50C provided on the rear side of the conveyance path of the electric wire 5. The resistance applying mechanism 50C is disposed so as to face the tension applying member 50A. The tension applying member 50A, the pressing mechanism 50B, and the resistance applying mechanism 50C are provided on the right side surface of the mounting plate 50D, and are supported by the mounting plate 50D.

The tension applying member 50A includes: a tension roller 51 for pressing the electric wire 5, and a holding member 52 for holding the tension roller 51. The holding member 52 holds the tension roller 51 at the rear end portion. The tension roller 51 is configured to rotate in the wire feeding direction, and to rotate vertically. As shown in fig. 3, the holding member 52 has a rotation shaft 52c of the tension roller 51. The rotation shaft 52c extends in the left-right direction. The rotation shaft 52c is provided near the rear end of the holding member 52.

The holding member 52 is formed in a flat plate shape extending in the vertical direction and the front-rear direction. The holding member 52 is configured to be movable in the front-rear direction. As shown in fig. 2, the holding member 52 includes a pair of slide grooves 52a extending in the front-rear direction. The pair of slide grooves 52a penetrate the holding member 52 in the left-right direction. Two pin members PN are inserted into the pair of slide grooves 52a, respectively. As shown in fig. 3, a plurality of pin members PN are fixed to the mounting plate 50D. The holding member 52 is held by a plurality of pin members PN and is movable in the front-rear direction by a slide groove 52 a.

The pressing mechanism 50B and the holding member 52 are arranged in the front-rear direction. The pressing mechanism 50B is provided in front of the holding member 52. The pressing mechanism 50B is a mechanism that presses the electric wire 5 via the tension applying member 50A by applying a force toward the electric wire 5 side, here, a force toward the rear to the tension applying member 50A. The pressing mechanism 50B is configured to press the electric wire 5 backward via the tension applying member 50A.

The pressing mechanism 50B includes: a moving mechanism that moves the holding member 52 so that the tension roller 51 abuts against or separates from the electric wire 5; and a spring 57 provided between the holding member 52 and the moving mechanism. The moving mechanism is provided with: handle 54, connecting rod 55, ejector pin 56. The moving mechanism moves the holding member 52 via the spring 57. The moving mechanism is a mechanism that manually moves the holding member 52 in the front-rear direction. The lift pin 56 is a columnar member extending in the front-rear direction. The jack 56 is configured to be movable in the front-rear direction. As shown in fig. 3, the handle 54 is configured to be rotatable in the left-right direction with the rear end portion being the axial direction. A connecting rod 55 connects the handle 54 with a ram 56. The link 55 transmits the rotation of the handle 54 to the jack 56, thereby moving the jack 56 in the forward and backward directions. When the handle 54 is rotated so as to tilt in the left direction from the state of being opened in the right direction, the push rod 56 is moved in the rear direction (toward the electric wire 5) via the link 55.

A spring 57 is inserted into the rear end of the jack 56. The spring 57 is a coil spring having a space inside, and the rear end of the push rod 56 is inserted into the space inside the spring 57. The push rod 56 is configured to press the holding member 52 via a spring 57. When the handle 54 is tilted and the push rod 56 moves rearward, the spring 57 abuts against the receiving block 52b of the holding member 52. The receiving block 52b is disposed rearward of the spring 57. The receiving block 52b is pressed by the spring 57, and the holding member 52 moves rearward. As a result, the tension roller 51 abuts on the electric wire 5. When the tension roller 51 presses the electric wire 5, the spring 57 contracts due to the reaction of the electric wire 5. The force with which the tension roller 51 presses the electric wire 5 is generated by the restoring force of the spring 57. The member that generates the force with which the tension roller 51 presses the electric wire 5 is not limited to a spring, and may be, for example, an air cylinder.

The resistance applying mechanism 50C is provided on the rear side of the conveyance path of the electric wire 5, and faces the tension roller 51 in the front-rear direction. The resistance applying mechanism 50C includes: a pair of rollers 58A, 58B, and an endless belt 59 wound around the pair of rollers 58A, 58B. The type of the belt 59 is not particularly limited, and is, for example, a stepped mesh transmission belt. The material of the belt 59 is also not limited, and a softer material is preferable. The belt 59 is here formed of rubber. The pair of rollers 58A, 58B are arranged in the vertical direction in the feeding direction of the electric wire 5. A portion of the belt 59 which is located between the pair of rollers 58A, 58B and is located forward of the pair of rollers 58A, 58B (hereinafter also referred to as a front portion 59f) extends in the vertical direction so as to extend along the feeding path of the electric wire 5. The front portion 59f of the belt 59 is disposed in contact with the electric wire 5. However, the tape 59 may not always be in contact with the electric wire 5. The tape 59 may be in contact with the electric wire 5 at least when the tension applying member 50A presses the electric wire 5. The tension roller 51 of the tension applying member 50A is disposed so as to face the front portion 59f of the belt 59. When the tension roller 51 presses the electric wire 5, the tape 59 is in contact with the electric wire 5 at a front portion 59f opposite to the tension roller 51.

Here, the resistance applying mechanism 50C is provided with neither an actuator for rotating the roller 58A nor an actuator for rotating the roller 58B. Since the feeder 20 feeds the electric wire 5 and the belt 59 runs around the pair of rollers 58A, 58B due to the feeding of the electric wire 5, the pair of rollers 58A, 58B are rotated in a driven manner.

The resistance applying mechanism 50C includes a roller moving member 60, and the roller moving member 60 can move the roller 58A and the roller 58B closer to or away from each other. By bringing the rollers 58A and 58B close to each other by the roller moving member 60, the tape 59 can be wound around the pair of rollers 58A and 58B. Further, the roller 58A and the roller 58B are separated from each other by the roller moving member 60, whereby the belt 59 can be stretched. The roller moving member 60 supports one of the rollers 58A. The roller moving member 60 includes a pair of long holes 60a extending in the vertical direction. Bolts BT are inserted into the pair of long holes 60a, respectively. The bolt BT is fastened to the mounting plate 50D. By loosening the bolt BT, the roller moving member 60 can be moved in the vertical direction. By fastening the bolt BT, the roller moving member 60 can be fixed without moving in the up-down direction. The roller moving member 60 can be used not only to wind the belt 59 around the pair of rollers 58A, 58B, but also to adjust the tension strength of the belt 59. The roller moving means 60 may be configured to be able to change the distance between the rollers 58A and 58B by moving at least one of the rollers 58A and 58B, and is not limited to which roller is moved. The member for adjusting the tension strength of the belt 59 may be a third roller configured to be movable in the radial direction of the endless belt 59 and to be capable of contacting the belt 59. The force with which the third roller presses the belt 59 can be adjusted by adjusting the position of the third roller in the radial direction of the belt 59. This can adjust the tension strength of the belt 59.

As shown in fig. 1, the direction switching roller 70 is provided between the tensioner 50 and the feeding device 20 in the conveying path of the electric wire 5. The direction switching roller 70 is provided upstream of the feeding device 20 in the feeding direction of the electric wire 5. The tensioner 50 is further provided further toward the upstream side in the conveying direction of the electric wire 5 than the direction-changing roller 70. The direction-changing roller 70 is a roller that turns the conveying direction of the electric wire 5 by winding the electric wire 5. Here, the direction switching roller 70 turns the feeding direction of the electric wire 5 forward from above. As shown in fig. 2, the direction switching roller 70 includes a rotary shaft 71 extending in the left-right direction. The direction switching roller 70 rotates about a rotation shaft 71.

The mounting plate 50D is provided with a plurality of wire guides 72A, 72B, 72C. Through holes for passing the electric wires 5 are formed in the wire guides 72A, 72B, and 72C, respectively. Wire guide 72A is provided on the upstream side of tensioner 50. The wire guide 72B is provided on the downstream side of the tensioner 50 and on the upstream side of the direction-changing roller 70. The wire guide 72C is provided on the downstream side of the direction switching roller 70 and on the upstream side of the feeder 20. The electric wire 5 is inserted through the through holes of the plurality of wire guides 72A, 72B, and 72C, and is conveyed on a predetermined conveyance path.

The control device 9 is connected to the feeding device 20, the wire clamping devices 30F and 30R, the cutting device 40, the peeling devices 41 and 42, and the crimpers 13F and 13R, and controls the operations thereof. The control device 9 may be a dedicated computer used for the electric wire processing device 1, or may be a general-purpose computer such as a personal computer. The control device 9 may also be a computer on the cloud. As shown in fig. 1, the control device 9 includes: a conveyance control unit 91, a cutting control unit 92, a first peeling control unit 93, a second peeling control unit 94, a first clamping control unit 95, a second clamping control unit 96, a first pressure contact control unit 97, and a second pressure contact control unit 98. In the present embodiment, the control units 91 to 98 are realized by a computer executing a predetermined program.

The conveyance controller 91 controls the feeder 20 and sets the wire 5 to be intermittently conveyed. That is, the conveyance control unit 91 controls the feeding device 20 to repeat conveyance of the electric wire 5 and stopping of the conveyance. The conveyance control unit 91 controls the feeding device 20 to stop conveyance when the electric wire 5 is conveyed a predetermined distance. The predetermined distance is a cut length of the electric wire 5. The cutting control section 92 causes the cutting device 40 to cut the electric wire 5 each time the feeding of the electric wire 5 is stopped. This enables the electric wire 5 to be continuously manufactured in a predetermined length. The first and second peeling controllers 93 and 94 control the first and second peeling devices 41 and 42, respectively, to peel the coating material of the electric wire 5. The first clamp control unit 95 and the second clamp control unit 96 control the first electric wire clamping device 30F and the second electric wire clamping device 30R, respectively, to perform predetermined operations including gripping, moving, and rotating the electric wire 5. The first crimp control unit 97 and the second crimp control unit 98 control the first crimper 13F and the second crimper 13R, respectively, to crimp the terminal 7 to the end of the stripped electric wire 5.

[ treatment of electric wire ]

The following describes the processing of the electric wire 5 by the electric wire processing apparatus 1. In the processing of the electric wire 5 by the electric wire processing apparatus 1, first, the electric wire 5 is fed by a predetermined cut length by the feeding apparatus 20. Here, the conveying distance of the electric wire 5 is measured by the servo motor of the feeding device 20. When the distance measured by the servo motor reaches a prescribed distance, the feeding device 20 is stopped. The fed electric wire 5 is held by the first jig 31F and the second jig 31R. After the electric wire 5 is gripped by the first and second grippers 31F and 31R, the electric wire 5 is cut into the rear electric wire 5 and the front electric wire 5 by the cutting device 40.

The cut front-side electric wire 5 is held by the first clamp 31F. The cut rear-side electric wire 5 is held by the second jig 31R. The first stripping device 41 cuts the coating material of the front end portion of the electric wire 5 on the rear side in the circumferential direction. The second stripping device 42 cuts the coating material of the rear end portion of the electric wire 5 on the front side in the circumferential direction. Subsequently, the first jig 31F is moved backward, and the second jig 31R is moved forward. Thereby, the coating material of the front end portion of the rear electric wire 5 and the coating material of the rear end portion of the front electric wire 5 are peeled off by the peeling knives 41A and 42A, respectively. Thereafter, the wire clamping devices 30F and 30R are rotated to guide the front end portion of the wire 5 on the rear side and the rear end portion of the wire 5 on the front side to the first crimping machine 13F and the second crimping machine 13R, respectively. Then, the terminals 7 are crimped to the front end portion of the rear electric wire 5 and the rear end portion of the front electric wire 5 by the crimpers 13F and 13R.

Thereafter, the first electric wire clamp device 30F returns to the initial position (the position shown in fig. 1), and releases the grip of the electric wire 5. After the gripping of the front electric wire 5 is released, the second electric wire gripping device 30R returns to the initial position (the position shown in fig. 1). The front electric wire 5 drops after releasing the grip of the second electric wire clamp 30R, and is collected by the tray 8.

[ operation of tensioner ]

Before the processing of the electric wire 5 is performed, the handle 54 of the tensioner 50 is operated to abut the tension roller 51 against the electric wire 5. Thereby, the electric wire 5 is sandwiched by the tension roller 51 and the front portion 59f of the belt 59. The tension roller 51 is pressed rearward by a spring 57. Accordingly, the tension of the spring 57 is applied to the electric wire 5 via the tension roller 51. The band 59 is pressed backward by the electric wire 5 and brought into close contact with the electric wire 5.

When the feeding of the electric wire 5 by the feeding device 20 is started, the tension roller 51 is pulled by the electric wire 5 to rotate. The belt 59 is pulled by the electric wire 5 and runs around the pair of rollers 58A and 58B. Accordingly, the pair of rollers 58A, 58B also rotates in a driven manner. At this time, the electric wire 5 is fed without slack because it is under the tension of the tension roller 51. Further, since the tension roller 51 and the tape 59 rotate in accordance with the operation of the electric wire 5, excessive friction is not generated between the coating material of the electric wire 5 and the tension roller 51 and the tape 59. Therefore, damage to the electric wire 5 due to the tension roller 51 and the belt 59 contacting the electric wire 5 is suppressed.

When the feeding device 20 feeds the electric wire 5 by a predetermined distance and stops feeding the electric wire 5, the electric wire 5 advances in the feeding direction by inertia, and the tension roller 51 continues to rotate by inertia. In the present embodiment, the inertial motion of the electric wire 5 and the tension roller 51 is suppressed by the friction between the pair of rollers 58A, 58B and the tape 59 wound around them. The rotation of the pair of rollers 58A, 58B and the belt 59 is stopped by friction, and inertial movement of the electric wire 5 in contact with the belt 59 is prevented. Therefore, in the present embodiment, after the conveyance of the electric wire 5 is stopped, the electric wire 5 is promptly stopped. As a result, the slack of the electric wire 5 shown in fig. 5 is suppressed. In addition, the accuracy of the cut length of the electric wire 5 is reduced due to inertial movement of the electric wire 5. At this time, too, since excessive friction is not generated between the coating material of the electric wire 5 and the tension roller 51 and the tape 59, damage to the electric wire 5 by the tension roller 51 and the tape 59 is suppressed. In particular, the tensioner 50 of the present embodiment includes a tension roller 51 as a member of the tension applying member 50A that contacts the electric wire 5. Therefore, the electric wire 5 is not easily damaged. Further, since the tape 59 is made of rubber, the electric wire 5 is less likely to be damaged.

In the present embodiment, the direction-changing roller 70 that changes the conveying direction of the electric wire 5 is provided on the downstream side of the tensioner 50. Since the electric wire 5 is also fed forward in the conveying direction by the inertia of the direction-changing roller 70, when the function of the tensioner 50 to suppress the excessive feeding of the electric wire 5 is insufficient, the electric wire 5 is likely to be loosened on the downstream side of the direction-changing roller 70 as in the case shown in fig. 5. The tensioner 50 of the present embodiment is provided on the upstream side of the direction-changing roller 70, and also suppresses the slack of the electric wire 5 on the downstream side of the direction-changing roller 70.

In the present embodiment, the tension strength of the belt 59 can be adjusted by the roller moving member 60. If the belt 59 is strongly tensioned, the resistance when the electric wire 5 is conveyed becomes large, but the electric wire 5 can be quickly stopped. If the belt 59 is weakly tensioned, the distance the electric wire 5 moves before stopping becomes long, but the resistance when the electric wire 5 is conveyed becomes small. By using the roller moving member 60, the resistance when the electric wire 5 is fed and the distance the electric wire 5 moves before stopping can be adjusted.

In the present embodiment, the tension applying member 50A can be separated from the feeding path of the electric wire 5 by a moving mechanism including the handle 54, the link 55, and the push rod 56. This facilitates the operation of attaching the electric wire 5 to the electric wire processing device 1.

In the present embodiment, the force with which the tension roller 51 presses the electric wire 5 is generated by the spring 57, and therefore the force with which the tension roller 51 presses the electric wire 5 is stable. Therefore, the feeding and stopping operations of the electric wire 5 are stable.

The tensioner 50 is preferably arranged upstream of the feeding device 20 and the cutting device 40 in the conveying direction of the electric wire 5, and the electric wire processing device 1 of the present embodiment is configured as described above. The tensioner 50 mainly suppresses the overfeeding of the electric wire 5 on the downstream side of the tensioner 50. Therefore, the tensioner 50 is preferably disposed upstream of the feeding device 20 and the cutting device 40 in the conveying direction of the electric wire 5.

[ other embodiments ]

One embodiment of the present invention has been described above. However, the above embodiments are merely examples. In addition to this, the present invention can be implemented in other various ways. Examples of other embodiments will be briefly described below.

A variation of tensioner 50 is shown in fig. 4. In fig. 4, the same reference numerals as those of the above-described embodiment are used for members that achieve the same functions as those of the above-described embodiment. As shown in fig. 4, the tensioner 50 of this modification also includes a belt 61 on the tension applying member 50A. The tension applying member 50A includes: a pair of tension rollers 51A, 51B, and an endless belt 61 wound around the pair of tension rollers 51A, 51B. The pair of tension rollers 51A and 51B are configured to press the electric wire 5 via the belt 61 when a force is applied to the tension applying member 50A by the pressing mechanism 50B (see, for example, fig. 2). The pair of tension rollers 51A and 51B are also rollers that are driven to rotate as the electric wire 5 is fed by the feeding device 20 (see fig. 1). In this way, the tensioner 50 may include a pair of rollers and a belt wound around the pair of rollers on both sides of the side of the conveying path of the electric wire 5. Thereby, the frictional force for stopping the electric wire 5 becomes large. As a result, the electric wire 5 can be stopped at a shorter distance. The roller that presses the electric wire 5 via the belt 61 may be one of a pair of rollers. In this case, the roller that presses the electric wire 5 via the belt 61 is a tension roller, and the other roller is a roller for winding the belt around the tension roller. The tension applying member 50A may include three or more rollers.

Further, two or more rollers and a tape wound around these rollers and brought into contact with the electric wire 5 may be provided only in the tension applying member. That is, the resistance imparting mechanism may not be present in this case.

The pressing mechanism that applies a force in the direction toward the electric wire to the tension applying member is not limited to a structure that presses the tension applying member in the direction toward the electric wire. The pressing mechanism may be configured to pull the tension applying member in the direction of the electric wire, for example. The pressing mechanism may be configured to support the tension applying member movably in the vertical direction or swingably so that the tension applying member presses the electric wire by its own weight, for example.

The structure of the electric wire processing apparatus is not particularly limited. The wire processing device may be, for example, a winding machine or the like that conveys the wire over a long distance. The wire processing device is not limited as long as it is a device accompanied by the conveyance of the wire. However, since the electric wire is stopped more frequently in the electric wire processing apparatus in which the electric wire is repeatedly conveyed and stopped, the tensioner of the present invention is more effective in the electric wire processing apparatus in which the electric wire is repeatedly conveyed and stopped. Further, the tensioner may not be provided in the wire processing device.

Claims (10)

1. An electric wire processing device is provided with:

a conveying device for conveying the electric wire along the length direction of the electric wire;

a tensioner that is provided upstream of the conveying device in a conveying direction of the electric wire and applies tension to the electric wire conveyed by the conveying device; and

a control device for controlling the conveying device,

the control device includes a conveyance control unit that controls the conveyance device to repeat conveyance of the electric wire and stop conveyance,

the tensioner is provided with:

a tension applying member provided on one of side portions of a conveying path of the electric wire and contacting the electric wire;

a pressing mechanism that presses the wire to the other side via the tension applying member by applying a force to the tension applying member toward the other side of the conveying path of the wire; and

a resistance applying mechanism provided on the other side of the conveying path of the electric wire so as to face the tension applying member,

the resistance applying mechanism includes:

a first roller;

a second roller; and

and a first belt that is looped, is wound around the first roller and the second roller, and is brought into contact with the electric wire at least when the tension applying member presses the electric wire.

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

the first roller and the second roller are arranged in a direction in which the electric wire is conveyed,

the tension applying member is disposed so as to face a portion of the first belt between the first roller and the second roller,

when the tension imparting member presses the electric wire, the first tape is brought into contact with the electric wire at a portion opposite to the tension imparting member.

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

the tension applying member includes a tension roller that rotates in a direction of feeding the electric wire and presses the electric wire.

4. The electric wire processing apparatus according to claim 3,

the tension applying member includes a holding member that holds the tension roller at the other end portion,

the pressing mechanism includes a moving mechanism capable of moving the holding member so that the tension roller comes into contact with or separates from the electric wire.

5. The electric wire processing apparatus according to claim 4,

the pressing mechanism includes an elastic member provided between the holding member and the moving mechanism,

the moving mechanism moves the holding member via the elastic member,

the elastic member is configured to contract due to a reaction force of the electric wire when the tension roller presses the electric wire.

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

the resistance applying mechanism includes a roller moving unit that can change a distance between the first roller and the second roller by moving at least one of the first roller and the second roller.

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

since the electric wire is conveyed by the conveying device and the first belt revolves due to the conveyance of the electric wire, the first roller and the second roller are rotated in a driven manner.

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

the tensioner is provided with neither a drive unit for rotating the first roller nor a drive unit for rotating the second roller.

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

further comprises a cutting device for cutting the electric wire,

the feeding control unit controls the feeding device and sets the feeding device to stop feeding when the electric wire is fed a predetermined distance,

the control device includes a cutting control unit that causes the cutting device to cut the electric wire each time the conveyance of the electric wire is stopped.

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

the tension applying member includes:

a third roller;

a fourth roller; and

a second belt wound around the third roller and the fourth roller in an annular shape,

at least one of the third roller and the fourth roller is configured to press the electric wire through the second belt when the pressing mechanism applies a force to the tension applying member.

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