JP2014007043A - Wire stripping method and device, and terminal wire crimping method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire stripping method, and the like, capable of substantially equalizing the strip length and the length of a core wire exposed by stripping, when peeling a coat from the tip of a wire where the outer periphery of the core wire, formed by stranding a plurality of single wires, is coated with resin.SOLUTION: In a stripping device 400, the tip of a wire clamped by a one side wire clamp device 100 is cut, at first, at a cut position P1a. Since a portion where the core wire exists is cut after the core wire shrinks, the core wire and the cut surface of the coat are arranged. Subsequently, the coat is peeled off from the tip of the one side wire at a strip position P1b. Since strip work is performed while arranging the cut surface substantially, the strip length is substantially equal to the length of the core wire exposed by stripping.

Description

  The present invention relates to a method and an apparatus for stripping a coating after cutting an electric wire having a core wire and an outer periphery coating to a certain length, and further to a method and an apparatus for crimping a terminal to an electric wire from which the coating has been stripped.

A general electric wire used for electric products and automobile wiring has a structure in which a core wire is covered with a resin such as vinyl. As a core wire, what twisted the some strand (for example, copper wire) is generally used. In such an electric wire, when the strand of the wire is large, if the electric wire is cut before terminal crimping or the like, the central core wire is separated from the surrounding coating on the cut surface (retracted back). May occur. In addition, depending on the material of the strand, only a part of the strand may shrink. Or depending on the kind of coating | cover, a coating | cover may shrink | contract from a core wire in a cut surface. This seems to be due to the following reasons. That is, before terminal crimping or the like, usually, the electric wire is unwound from the bundle of electric wires wound in a coil shape, cut into a predetermined dimension, and the coating at the tip is peeled off. At the time of cutting, the electric wire is opened with a predetermined width and held by a clamp, and the vicinity of the center is cut, but the tension applied to the electric wire at the time of cutting is lost. At this time, depending on the strands of the strands and the covering material, the core wire or the covering is drawn in the direction of the electric wire bundle, and seems to be retracted (shrinks) from the cut surface in the electric wire longitudinal direction. Generally, the length of the coating to be peeled off (strip length) is the length of the core wire exposed by the strip. This length is determined according to the terminal to be crimped. However, if the coating is peeled off with a predetermined strip length while the core wire (or coating) is contracted from the cut surface, the strip length may be different from the length of the exposed core wire, and the assumed crimped state may not be achieved.
Note that the core wire (or coating) has the largest amount of retraction at the time of cutting, but there is also a tendency to gradually retreat a small amount as time passes. In addition, the end portion (top side) of the wire remaining on the wire bundle side tends to have a larger amount of retraction than the end portion (tail side) of the cut wire.

  The present invention has been made in view of the above points, and provides an electric wire peeling method, a terminal crimping method, and the like that can be stripped as expected in an electric wire whose outer periphery of a core wire is covered with a resin. For the purpose.

  A first peeling method of the present invention is a method in which an electric wire having a core wire and an outer periphery coating is cut to a certain length, and then the coating is peeled off. Cutting for setting the length of the electric wire (length determining cut) After that, the length-cut end portion is cut again by a small amount (end alignment cut), and then the coating is peeled off.

When the core wire has a structure in which a plurality of strands (for example, copper wires) are twisted, when the wire wound in a coil shape is rewound and cut into a predetermined dimension, the core wire (or coating) is cut away from the cut surface at the cut surface. There may be a phenomenon of retraction. Therefore, in the present invention, the end portion cut by the cutting device is cut off again by a small amount (for example, 3 to 6 mm) (end alignment cut), the core wire and the cut surface of the coating are aligned, and then the coating is peeled off. Thereby, the length of the coating to be peeled off and the length of the exposed core wire are almost the same, and the terminal crimping operation as expected can be performed.
Note that the core wire may be cut again (end alignment cut) after the coating is peeled off. However, from the viewpoint of preventing the scattering of the strands during cutting and shortening the strip time (the strip length increases because the strip length is cut in anticipation of the length of the end alignment cut) Peeling is preferable.

  A first terminal crimping method of the present invention is a method of cutting an electric wire having a core wire and an outer periphery coating to a certain length, then stripping the coating, and thereafter crimping the terminal, for setting the length of the electric wire. Between cutting (length-decision cut) and terminal crimping, the length-cut end is cut again by a small amount (end alignment cut).

  The second peeling method of the present invention is a method in which an electric wire having a core wire and an outer periphery coating is cut to a certain length, and then the coating is peeled off. During the temporary stop for changing the length of the electric wire, The outer surface of the electric wire nearest to the cutting position is held with a clamp.

  The temporary stop, for example, takes about 5 to 10 minutes, for example, by changing the type of the crimp terminal or replacing the terminal crimping device. In the meantime, if the clamp is opened, the core wire (or coating) will be gradually retracted. Therefore, by retracting the temporarily stopped electric wire, the core wire (or covering) can be prevented from being retracted. In addition, when clamped for a long time, the coating may have an unacceptable indentation. In that case, it is preferable to cut off the portion with the indentation.

  The second terminal crimping method of the present invention is a method of cutting an electric wire having a core wire and an outer periphery coating to a certain length, then stripping the coating, and then crimping the terminal, and the wire length resizing and terminal It is characterized by holding the outer surface of the wire nearest to the cutting position with a clamp during the primary stop for changing the type.

  A first peeling apparatus of the present invention is an apparatus for stripping a coating after cutting an electric wire having a core wire and an outer periphery coating to a certain length, and cutting for setting the length of the electric wire (length determination cut) And a cutter that cuts the end portion of which the length has been cut and cut again (end alignment cut) by a small amount.

  In the present invention, a cutter for stripping (striping) the coating can also be provided.

  Although an edge aligning cutter and a strip cutter can be used in combination, considering the durability of the blade and the like, it is preferable to use separate cutters.

A first terminal crimping apparatus of the present invention is an apparatus for cutting an electric wire having a core wire and an outer periphery coating to a certain length, then stripping the coating, and thereafter crimping the terminal, for setting the length of the electric wire. A cutting device that cuts (length-decision cut), a cutting device that cuts the tip of the wire after the length-decision cut by a small amount again (end-aligned cut), a strip device that strips the coating on the tip of the wire, and strips the coating A device for crimping a terminal to the tip of the wire,
It is characterized by providing.

  The second peeling apparatus of the present invention is an apparatus for stripping a coating after cutting an electric wire having a core wire and an outer periphery coating to a certain length, and cutting for setting the length of the electric wire (length determining cut) Cutting device that cuts the length of the wire after cutting the length, cuts the end of the wire again (end-aligned cut), a strip device that strips the coating on the tip of the wire, and a temporary change of wire length, etc. And a clamping device that clamps the outer surface of the electric wire nearest to the cutting position during the stop.

  A second terminal crimping device of the present invention is a device for cutting an electric wire having a core wire and an outer periphery coating to a certain length, then stripping the coating, and thereafter crimping the terminal, for setting the length of the electric wire. A cutting device that cuts (length-decision cut), a cutting device that cuts the tip of the wire after the length-decision cut by a small amount again (end-aligned cut), a strip device that strips the coating on the tip of the wire, and strips the coating A device that crimps a terminal to the tip of the wire, and a clamp device that clamps the outer surface of the wire closest to the cutting position during the primary stop for changing the length of the wire or changing the terminal type, etc. To do.

  As apparent from the above description, according to the present invention, the end portion cut by the cutting device is peeled off again after being cut off again by a small amount (for example, 3 to 6 mm) (end alignment cut). The lengths of the core wires exposed by peeling off the coating can be made substantially the same. Therefore, the terminal crimping operation as expected can be performed.

It is a top view which shows typically the terminal crimping electric wire manufacturing apparatus containing the peeling apparatus and terminal crimping apparatus which concern on embodiment of this invention. It is a side view which shows the structure of the clamp apparatus of the terminal crimping electric wire manufacturing apparatus of FIG. It is a front view which shows the structure of the clamp part of the clamp apparatus of FIG. 2, FIG. 3 (A) shows a clamp closed state and FIG. 3 (B) shows a clamp open state. It is a front view which shows the structure of the cutting device of the terminal crimping electric wire manufacturing apparatus of FIG. It is a front view which shows the structure of the peeling apparatus of the terminal crimping electric wire manufacturing apparatus of FIG. It is a front view which shows the state which each blade of the peeling apparatus of FIG. 5 opened. FIG. 7A is a diagram for explaining a peeling process in the peeling apparatus of FIG. 5, FIG. 7A is a length determination cut, FIG. 7B is a length determination cut, and FIG. FIG. 7D schematically shows the state of the end of the wire during stripping. It is a flowchart which shows an example of the terminal crimping electric wire manufacturing process using the terminal crimping electric wire manufacturing apparatus of FIG. It is a flowchart explaining the peeling method which concerns on other embodiment of this invention.

Good form for carrying out the invention

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, with reference to FIG. 1, the terminal crimping electric wire manufacturing apparatus containing the peeling apparatus and terminal crimping apparatus of this invention is demonstrated.
Terminal crimped wire manufacturing apparatus 1 is a wire feeding device 10 that feeds (feeds) wires from a bundle of wires wound in a coil, and a clamp that clamps the tip (top) of the fed wires (referred to as one-side wires) Apparatus 100, apparatus 200 for cutting an electric wire into a predetermined length, clamping apparatus 300 for clamping a rear end portion (tail) of the cut electric wire (referred to as a two-side electric wire), and a skin for stripping the coating on the end portion of the one-side electric wire Peeling device 400 A terminal crimping device 500 that crimps a terminal to the end of the one-side wire, a peeling device 600 that strips the coating on the end of the two-side wire, and a terminal crimping device 700 that crimps the terminal to the end of the two-side wire And a wire dispensing device 800 having terminals crimped at both ends. These are installed on the machine base 3.
An electric wire shall be an electric wire which has the core wire which twisted the some strand, and outer periphery coating | cover. A copper wire can be used as the element wire, and a vinyl resin can be used as the covering.
In the following description, the left-right direction indicates the left-right direction of the figure, and the up-down direction indicates the up-down direction of the figure.

  The electric wire feeder 10 and the 1 side electric wire clamp apparatus 100 are located in series in the direction (electric wire feeding direction) in which the electric wire drawn out from the electric wire bundle is sent. The two-side electric wire clamping device 300 is also arranged in the electric wire feeding direction and is opposed to the one-side electric wire clamping device 100 with a predetermined interval. The position where the wire feeding device 10 and the one-side and two-side wire clamping devices 100, 300 are arranged in series in the wire feeding direction is referred to as a wire feeding position P0 (also referred to as an origin), and the height is referred to as a wire feeding height. In the wire feeding direction, the direction on the wire bundle side is referred to as the rear direction, and the direction on the opposite wire bundle side is referred to as the front direction or the front direction.

  The 1-side electric wire clamping device 100 can be turned from the electric wire feeding position P0 to one side (in this example, the right direction in the figure) at an angle of about 70 ° with respect to the electric wire feeding direction. On the other hand, the two-side electric wire clamping device 300 can move on a straight line from the electric wire feeding position P0 to one of the directions orthogonal to the electric wire feeding direction (in this example, the left direction in the figure).

The cutting device 200 is disposed between the first-side electric wire clamp device 100 and the second-side electric wire clamp device 300 at the electric wire feeding position P0.
The 1-side electric wire peeling device 400 and the terminal crimping device 500 are sequentially arranged at positions P1 and P2 that are separated from the electric wire feeding position P0 by a predetermined angle in the turning direction of the 1-side electric wire clamping device 100.
The two-side electric wire peeling device 600, the terminal crimping device 700, and the payout device 800 are positioned at a predetermined distance from the electric wire feeding position P0 in the moving direction of the two-side electric wire clamping device 300, P3, P4, and Arranged sequentially in P5.

First, the wire feeder 10 will be described.
The electric wire feeder 10 sends out the electric wire drawn out from the electric wire bundle along the electric wire feeding direction, and various configurations can be used. For example, a plurality of roller pairs composed of left and right rollers can be arranged in the wire feeding direction. This electric wire feeder 10 only feeds an electric wire between rollers, and does not have a function of gripping (clamping) the electric wire.
A correction device 20 is provided upstream of the electric wire feeder 10 in the electric wire feeding direction to correct the bending and habit of the electric wire fed out from the electric wire bundle. As the straightening device 20, a configuration in which a plurality of rollers are arranged along the electric wire feeding direction on both the left and right sides or the upper and lower sides in the electric wire feeding direction can be used.

The clamp device for the one-side electric wire will be described with reference to FIGS. FIG. 2 is a side view showing the structure of the clamping device. FIG. 3A shows the clamp closed state, and FIG. 3B shows the clamp open state.
The 1 side electric wire clamp apparatus 100 clamps the front-end | tip of the electric wire (1 side electric wire) supplied from the electric wire feeder 10. As shown in FIG. 2, the apparatus 100 mainly includes a clamp unit 110 and a clamp bracket 150 that is supported so that the clamp unit 110 can move up and down. The 1-side clamping device 100 can be moved in the wire feeding direction by the moving mechanism 160, and can be turned by a predetermined angle from the wire feeding position P0 by the turning mechanism 170 (see FIG. 1).

  The clamp unit 110 mainly includes a clamp part 120 and a housing 140 to which the clamp part 120 is attached. The clamp part 120 is attached to the front surface of the housing 140 in the wire feeding direction.

As shown in FIG. 3, the clamp unit 120 includes left and right claws 121 and 122 that grip an electric wire from a direction (left and right direction) orthogonal to the wire feeding direction, and left and right levers 123 and 124 that hold the claws, Links 125 and 126 connected to each of the left and right levers 123 and 124, and a cylinder 128 to which both links 125 and 126 are connected are provided.
As shown in FIG. 3B, grooves 121a and 122a having a triangular front cross section extending in the wire feeding direction are formed on the opposing surfaces of the left and right claws 121 and 122, respectively. At the time of electric wire clamping, the electric wire is held between the bottoms of both grooves 121a and 122a. Further, on the opposing surfaces of the left and right claws 121, 122, protrusions are formed that protrude alternately in a direction orthogonal to the wire feeding direction. When the clamp is completely closed as shown in FIG. Overlapping surfaces close to each other.

The left and right levers 123 and 124 are rotatably connected to a fixing pin 131 fixed to the housing 140 near the center. The left and right claws 121 and 122 are fixed to the tips of the left and right levers 123 and 124 with screws so that the grooves 121a and 122a face each other. The base ends of the left and right levers 123 and 124 are rotatably connected to the distal ends of the left and right links 125 and 126, respectively. The base ends of the left and right links 125 and 126 are rotatably connected to the distal end of an extension member 129 attached to the distal end of the rod 128a of the cylinder 128.
As shown in FIG. 2, the cylinder 128 is attached to the lower portion of the housing 140 by a bracket 131.

In the fully closed state of the clamp shown in FIG. 3A, the rod 128a of the cylinder 128 extends to open the links 125 and 126, the left lever 123 rotates clockwise around the fixing pin 131, and the right lever 124 It rotates counterclockwise about the fixing pin 131, and the opposing surfaces of the left and right claws 121 and 122 are in contact with each other.
In order to release the clamp, the rod 128a of the cylinder 128 is contracted. Then, as shown in FIG. 3B, the links 125 and 126 are rotated so as to be closed, and the left and right levers 123 and 124 are rotated around the fixing pin 131 in the opposite direction to the left and right. The opposing surfaces of the claws 121 and 122 are opened, and the clamp is released.

  Again, a description will be given with reference to FIG. A downwardly extending block 143 is attached to the housing 140. At the lower end of the block 143, a dog 144 extending in a direction orthogonal to the wire feeding direction is provided. On the upper surface of the dog 144, a roller of a sinking mechanism of the terminal crimping device 500 described later contacts. The sinking mechanism lowers the clamp unit 110 at a predetermined speed along with the crimping so that the electric wire does not bend or bend to a middle height when the terminal is crimped.

  Further, a guide pipe 145 for guiding the electric wire is attached to the upper surface of the housing 140. The guide pipe 145 is attached upstream of the clamp unit 120 in the electric wire feeding direction, and guides the electric wire sent from the electric wire feeder 10 to the clamp unit 120.

  The housing 140 of the clamp unit 110 is supported by the clamp bracket 150 so as to be movable up and down. A slider 147 extending in the vertical direction is attached to the surface of the housing 140 opposite to the surface to which the clamp portion 120 is attached. On the other hand, a linear way 153 extending in the vertical direction is fixed to the clamp bracket 150 so that the slider 147 is slidably engaged. With this mechanism, the clamp unit 110 is guided in the vertical direction along the linear way 153.

  The clamp unit 110 is supported by being biased upward from the clamp bracket 150 by a spring 155. The upper end of the spring 155 is held on the lower surface of the housing 140 of the clamp unit 110, and the lower end is supported by a stay 156 fixed to the surface of the clamp bracket 150 on the clamp unit side. The height of the clamp unit 110 biased upward by the spring 155 is determined by the sinking mechanism of the terminal crimping device that abuts on the dog 144 of the block 143.

  The moving mechanism 160 rotates the linear way 161 extending in the wire feeding direction, the slider 163 slidably engaged with the linear way 161, the ball screw 165 extending in the wire feeding direction parallel to the linear way 161, and the ball screw 165. And a servo motor (not shown). The clamp bracket 150 of the one-side electric wire clamp device 100 is attached to the slider 163 and is engaged with the ball screw 165 via the bearing 166. When the ball screw 165 is rotated by the servo motor, the clamp bracket 150 moves in both directions of the wire feeding direction along the linear way 161 via the slider 163. Therefore, the 1 side electric wire clamp apparatus 100 is movable to both directions of an electric wire feeding direction.

  The turning mechanism 170 (see FIG. 1) includes a servo motor (not shown) having an output shaft extending upward. The output shaft of the motor is attached to a bracket at the base end of the linear way 161 via a speed reducer. The rotation of the servo motor causes the linear way 161 to pivot to positions P1 and P2 that are separated from the wire feed position P0 by a predetermined angle around the output shaft, whereby the one-side wire clamp device 100 pivots from the wire feed position P0. It becomes possible.

Next, the cutting device will be described with reference to FIG.
As described above, the cutting device 200 is disposed in the middle of the opposing one-side and two-side clamping devices 100 and 300 at the wire feeding position P0, and cuts the electric wires clamped by both the clamping devices 100 and 300. Is.

  The cutting device 200 includes a cutting unit 210 and a driving unit 220 that drives the cutting unit 210 to perform a cutting operation. The cutting unit 210 includes upper and lower blades 211 and 212 and upper and lower holders 213 and 214 that hold the upper and lower blades 211 and 212, respectively. V-shaped, tapered blade portions 211 a and 212 a are formed on the lower edge of the upper blade 211 and the upper edge of the lower blade 212, respectively. The upper and lower blades 211 and 212 are attached to the upper and lower holders 213 and 214, respectively, so that the vertical position can be adjusted and removed.

  The drive unit 220 includes a linear way 221 that extends in the vertical direction, upper and lower sliders 223 and 224 that are slidably engaged with the linear way 221, and upper and lower air cylinders 225 and 226 that drive the upper and lower sliders 223 and 224, Is provided. These are supported by a vertically long housing 230. The upper holder 213 is attached to the upper slider 223, and the lower holder 214 is attached to the lower slider 224. The upper slider 223 is attached to the tip of the rod of the upper cylinder 225 via the rod end 227, and the lower slider 224 is attached to the tip of the rod of the lower cylinder 226 via the rod end 228. By extending the rods of both cylinders 225 and 226, the upper and lower holders 213 and 214 approach and the electric wires are cut by the upper and lower blades 211 and 212. On the contrary, when the rods of both cylinders 225 and 226 are contracted, the upper and lower holders 213 and 214 are separated.

  In addition, the cutting device 200 can be provided with a center shifting mechanism that brings the rear end portion of the two-side electric wire clamped by the two-side electric wire clamping device 300 to the electric wire feeding position P0.

Next, the peeling apparatus 400 is demonstrated with reference to FIG. 5, FIG.
The peeling apparatus 400 includes a cutting / strip unit 410 and a driving unit 420 that drives the cutting / strip unit 410 to perform a cutting / strip operation. The cutting / strip unit 410 holds upper and lower blades 411 and 412 for cutting, upper and lower blades 413 and 414 for strip, an upper holder 417 for holding upper blades 411 and 413, and a lower blade 412 and 414. The lower holder 418 is provided.

  As shown in FIG. 6, V-shaped, tapered blade portions 411 a, respectively, are provided on the lower edges of the upper blades 411 and 413 and the upper edges of the lower blades 412 and 414 in the cutting / strip portion 410. 413a, 412a, 414a are formed. The upper and lower blades 411 and 412 for cutting and the upper and lower blades 413 and 414 for strip are arranged in this order in the turning direction of the one-side electric wire clamp device, and the upper blades 411 and 413 are respectively placed on the upper holder 417, the lower blade 412, 414 is attached to the lower holder 418. The positions of the cutting upper and lower blades 411 and 412 in the turning direction are defined as a cutting position P1a, and the positions of the strip upper and lower blades 413 and 414 are defined as a strip position P1b. Each blade is fixed to the holder with a positioning pin. As shown in FIGS. 5 and 6, the positions (heights) of the upper blade 411 for cutting and the upper blade 413 for strip are the same in the vertical direction, and the lower blade 412 for cutting and the lower blade for strip are the same. The position (height) of 414 is the same.

  The drive unit 420 includes upper and lower linear ways 421 and 422 extending in the vertical direction, upper and lower sliders 423 and 424 slidably engaged with the upper and lower linear ways 421 and 422, and the upper and lower linear ways 421 and 422. A ball screw 426 that extends and a motor 427 that drives the ball screw 426 are provided. These are housed in a vertically long housing 429. The upper and lower linear ways 421 and 422 are fixed to the housing 429 so as to be separated in the vertical direction. The upper and lower sliders 423 and 424 are slidably engaged with the linear ways 421 and 422, respectively, and are engaged with a ball screw 426 via bearings (not shown). In the ball screw 426, the direction of the screw formed at the upper part engaged with the upper slider 423 is opposite to the direction of the screw formed at the lower part engaged with the lower slider 424. With such a configuration, when the ball screw 426 is rotated by the motor 427, the upper and lower sliders 423 and 424 move in the opposite direction of the vertical direction along the upper and lower linear ways 421 and 422, respectively. Therefore, the upper and lower holders 417 and 418 move by the same distance in the direction approaching and separating from each other.

  The upper and lower holders 417 and 418 are driven by a drive unit 420 between a fully open position where a space between the upper and lower blades is sufficiently opened, a cutting position where the upper and lower blades completely overlap, and a strip position where the upper and lower blades partially overlap. Driven to take three positions. At the cutting position, the electric wire is cut by the upper and lower blades, and at the strip position, a cut is formed in the covering of the electric wire by the upper and lower blades.

  As the terminal crimping device 500, a commonly used one can be used (for example, Japanese Patent No. 4230534). This device is a device for crimping terminals supplied as a series of strips one by one to the end of an electric wire from which the coating has been stripped. The terminal crimping device 500 is provided with a sinking device that lifts and lowers the clamp unit 110 of the clamp device 100 described above. The sinking device is for lowering the clamp unit 110 in synchronization with the cutting of the band. As a result, the crimping operation is performed while the electric wire remains in a substantially straight state, so that the electric wire is not bent at the middle or high at the base of the terminal and the tip is not bent downward.

Next, each device on the two-side electric wire side will be described.
The two-side wire clamp device 300 has substantially the same configuration as the one-side wire clamp device 200, but the guide unit 145 is not provided in the clamp unit 110. Moreover, although it can move to an electric wire feeding direction by the moving mechanism similar to the electric wire feeding direction moving mechanism of a 1 side electric wire clamp apparatus, the 2 side electric wire clamp apparatus 300 does not rotate, but one side of the direction orthogonal to an electric wire feeding direction ( In this example, it can move on a straight line in the left direction in the figure.

The same structure as the 1 side electric wire peeling apparatus 400 can be used for the 2 side electric wire peeling apparatus 600. FIG.
The 2 side electric wire terminal crimping | compression-bonding apparatus 700 can use the thing of the same structure as the 1 side electric wire terminal crimping | compression-bonding apparatus 500. FIG.

  The payout device 800 is for receiving the electric wire from the clamp device 300 after the terminal is crimped to the rear end portion of the two-side electric wire by the terminal crimping device 700 and transporting the electric wire from the terminal crimping position P4 to the payout position P5. is there. The device 800 can include, for example, a clamp unit that receives an electric wire from the clamp device and a pivot mechanism of the clamp unit.

Next, with reference to FIG. 7, the cutting and stripping operation in the peeling apparatus in the terminal crimped electric wire manufacturing apparatus of the present invention will be described. Fig. 7 (A) shows the state of the end of the wire when the length is cut, Fig. 7 (B) shows the state after the length is cut, Fig. 7 (C) shows the end-aligned cut, and Fig. 7 (D) shows the state of the end of the wire. Is shown schematically. In this example, the 1-side electric wire will be described, but the same applies to the 2-side electric wire.
First, the length of the electric wire is cut by the cutting device 200 at the electric wire feeding position P0. As shown in FIG. 7A, the length-decision cut is performed by using the upper and lower blades 211 and 212 of the cutting device 200 at the center of both clamp portions of the electric wire W clamped by the one-side clamping device 100 and the two-side clamping device 300. Disconnect with. Then, as shown in FIG. 7B, the central core wire W1 is contracted by a distance L0 from the cut surface of the surrounding coating C. This is because, as described above, the tension applied to the electric wire is released and the core wire W1 contracts (retracts in the back direction (left direction in the figure)).

  Therefore, in the present invention, after that, the edge alignment is cut by the peeling device 400. That is, as shown in FIG. 7C, at the cutting position P1a, the one-side electric wire clamp device 100 is advanced by the cutting length L1 (> L0, for example, 2 to 3 mm). Then, the drive part 420 of the peeling apparatus 400 is driven, and the front-end | tip of the electric wire W is cut | disconnected by the cutting blades 411 and 412. FIG. At this time, since the portion where the core wire W1 exists is cut after the core wire W1 is contracted, the cut surfaces of the core wire W1 and the coating C are aligned. The cutting length L1 can be changed by adjusting the advancement amount of the clamping device 100.

  Thereafter, at the peeling position P1b, as shown in FIG. 7D, the one-side electric wire clamping device 100 is advanced by the strip length L2 (for example, 2 to 3 mm), and then the peeling device 400 is driven. Then, the coating C is cut with the strip blades 413 and 414. The strip length L1 is the length of the core wire W1 to be exposed, and is predetermined according to the type of electric wire to be manufactured. Then, the 1 side electric wire clamp apparatus 100 is retracted, and the coating | coated C is stripped off from the front-end | tip of a 1 side electric wire. Note that when the coating is peeled off at a predetermined strip length L2 in the state of FIG. 7B, the length of the exposed core wire W1 is different from the strip length L2 (in this example, it is shortened). Therefore, in the present invention, as shown in FIG. 7D, since the end alignment cut is performed after the core wire W1 is contracted, only a predetermined coating length L2 is obtained with the cut surfaces of the coating C and the core wire W1 aligned. The coating C will be peeled off. That is, as shown in FIG. 7E, the length of the exposed core wire W1 is the same as the strip length L2. The strip length L2 can be changed by adjusting the advancement amount of the clamping device 100.

  Note that the core wire W1 is also expected to be shrunk at the time of the end alignment cut (FIG. 8C). However, unlike the cutting of the electric wire by the cutting device 200, the cutting by the peeling device 400 applies tension to the electric wire. Disconnected when not in a cantilever state. For this reason, it seems that the length which the core wire W1 shrinks is quite small.

In general, the time from cutting (FIG. 7A) to edge alignment cut (FIG. 7C) is about 300 msec, and from edge alignment cut (FIG. 7C) to strip (FIG. 7D). ) Is about 20 msec, and the time from stripping to terminal crimping is about 300 msec. As described above, the core wire has the largest amount of retraction at the time of cutting, but after that, there is a tendency to gradually retreat a small amount as time passes. Since the time from cutting to edge alignment cut is relatively long, the edge alignment cut is performed after the core wire has shrunk to some extent. By adjusting the end alignment cut length L1 in anticipation of the contraction amount, the portion where the core wire W1 is contracted is not end aligned cut.
In addition, although the time from the end alignment cut to the terminal crimping is relatively long, the amount of shrinkage of the core wire is expected to be relatively small, so that the terminal can be crimped while the core wire does not shrink so as to hinder terminal crimping.

  Desirably, if the end alignment is cut as short as possible before the terminal crimping operation, the terminal can be crimped with the least amount of shrinkage of the core wire. For this purpose, it is preferable to first strip at the peeling position P1, and then cut the ends. However, in this case, the strip is stripped in consideration of the shrinkage of the core wire in advance, so that the strip length becomes long and the working time becomes long. In addition, since the exposed bundle of strands after the strip is cut, the strands may be scattered and the cut surface may be crushed, so that there is a possibility that the strands cannot be cut cleanly.

  Although the case where the core wire contracts from the cut surface of the coating has been described here, the same effect can be obtained when the coating contracts from the cut surface of the core wire.

  Further, in the apparatus of the present invention, the peeling device 400 includes separate upper and lower blades for cutting and strip, but a pair of upper and lower blades can be used for both cutting and stripping. That is, when cutting, the upper and lower blades are driven to a cutting position where they overlap completely, and when stripping, the upper and lower blades are driven to a partially overlapping position. However, considering the durability of the blade and the like, it is preferable that the blades are separated.

  In addition, the cutting device 200 can perform edge alignment cut. In this case, the cutting device 200 cuts the electric wire (decides the length), and then cuts the front end of the one-side electric wire after the predetermined time has elapsed.

Next, with reference to FIG.1 and FIG.8, the method of manufacturing a terminal crimping electric wire with this terminal crimping electric wire manufacturing apparatus is demonstrated. Here, the state where the tip of the one-side electric wire whose terminal is crimped to the tip is clamped to the one-side clamping device 100 is assumed as an initial state, and the description is started from this initial state.
In this initial state, the two-side electric wire clamping device 300 is in the clamp open state, and both the blades of the cutting device 200 are in the open state. First, in S1, the one-side electric wire clamping device 100 is opened, and the electric wire feeding device 10 sends an electric wire having a predetermined length (the length of the terminal crimped electric wire to be manufactured) from the electric wire bundle in the electric wire feeding direction. To pay. The tip of the electric wire passes through the cutting device 200 and the two-side electric wire clamping device 300 and is sent in the electric wire feeding direction.

Next, after clamping an electric wire with the 1 side clamp apparatus 100 and the 2 side clamp apparatus 300 in S2, the electric wire is cut | disconnected by the cutting device 200 in the center of both clamp parts in S3. Here, the tip of the one-side electric wire is clamped in the one-side electric wire clamping device 100, and the rear end of the two-side electric wire is clamped in the two-side electric wire clamping device 300.
First, a description will be given starting from the one-side electric wire. Next, the one-side electric wire clamp device 100 is turned to the peeling position P1 by the turning mechanism 170. At the peeling position P1, the one-side electric wire clamping device 100 first turns to the cutting position P1a and then turns to the strip position P1b.

  As described with reference to FIG. 7, the one-side electric wire is first further cut by a predetermined length (for example, 2 to 3 mm) from the tip at the cutting position P1a of the peeling device 400 (end-aligned cut). (S4) After that, the coating is peeled off at the peeling position P1b (S5).

  And the 1 side electric wire clamp apparatus 100 turns to the terminal crimping | compression-bonding position P2, the terminal crimping apparatus 500 is driven in S6, and a terminal is crimped | bonded to the front-end | tip of a 1 side electric wire. Although a detailed description of the crimping operation is omitted, as described above, when the crimper of the crimping device descends and the slide cutter is driven downward and the cutting blade cuts the strip, the clamp of the one-side wire clamping device 100 is clamped. The unit 110 is lowered in synchronism with the slide cutter by the sinking device 550, and crimps the electric wire in a substantially straight state. For this reason, an electric wire does not bend in the middle and high at the base of a terminal, and a front end does not bend below. After crimping, the one-side electric wire clamp device 100 turns to the electric wire feeding position P0.

Next, the 2-side electric wire will be described.
After cutting with the cutting device 200, the terminal on the two-side electric wire is crimped to the tip, and the rear end is clamped on the two-side electric wire clamping device 300. And the 2 side electric wire moves to the position P3 of a peeling apparatus by the 2 side electric wire clamp apparatus moving mechanism similarly to the 1 side electric wire. At the peeling position P3, the two-side electric wire clamping device 300 first moves to the cutting position P3a and the tip is cut (end alignment cut) (S7), and moves to the strip position P3b and strips the coating (S8). ).
Note that the length of the end alignment cut by the peeling device 200 (L1 in FIG. 8C) may be the same as that of the one-side electric wire (top side), but as described above, the two-side electric wire (tail The side) tends to shrink less, so it may be shorter than the case of the one-side electric wire.

  And the 2 side electric wire clamp apparatus 300 moves to the terminal crimping | compression-bonding position P4, the terminal crimping apparatus 700 is driven in S9, and a terminal is crimped | bonded to the rear end of a 2 side electric wire. In S <b> 10, the electric wire having terminals crimped at both ends is delivered from the two-side electric wire clamp device 300 to the dispensing device 800. Then, the payout device 800 pays out on the payout tray at the payout position P5.

  In addition, when manufacturing the terminal crimping electric wire by which waterproof rubber was inserted in the base of a terminal, a waterproof rubber insertion unit is installed between the electric wire feeding position P0 and the peeling positions P1 and P3. At this time, the waterproof rubber insertion operation is usually performed before the strip. For this reason, since the waterproof rubber insertion operation time further elapses after cutting, the amount of shrinkage of the core wire increases. Therefore, it is more preferable to cut the edges before the strip as in the present invention.

  Moreover, the terminal crimping electric wire using the electric wire only of a general copper wire can also be manufactured with the terminal crimping electric wire manufacturing apparatus of this invention. In this case, the stripping device 400 does not perform edge alignment cut, but only strips.

Next, with reference to FIG. 9, another example of a method for manufacturing a terminal crimped electric wire with this terminal crimped electric wire manufacturing apparatus will be described.
Similar to the method described with reference to FIG. 7, the electric wire is cut by the cutting device at T <b> 1. Thereafter, at T2, it is determined whether the electric wire is clamped and held. The situation where the electric wire is clamped and held, for example, when the type of the crimping terminal is changed in the terminal crimping device, when the terminal crimping device itself is replaced, or when the wire length is changed, etc. It is a situation (also referred to as step change), and is usually about 5 minutes to 10 minutes. If it is determined that the electric wire is not clamped and held, the process proceeds to T3, ends alignment cut, proceeds to T4, strips, and proceeds to T5 to perform terminal crimping, as described above.

  On the other hand, when it is determined that the electric wire is being clamped at T2, the process proceeds to S6, and the state where the tip of the one-side electric wire is clamped by the one-side electric wire clamping device 100 is maintained. In addition, after a cutting | disconnection, since the electric wire is the state clamped with the 1 side and 2 side electric wire clamp apparatuses 100 and 300, the state will be maintained. During the temporary stop, the clamp of the clamp device is generally released to prevent the impression of the clamp from remaining on the coating. In the present invention, however, the core wire or the coating is prevented from shrinking as described above. Therefore, the tip of the 1-side electric wire is continuously clamped by the 1-side electric wire clamp device 100 even during the temporary stop.

At T7, it is determined whether or not a predetermined time has elapsed since clamping. When the predetermined time has elapsed, the process proceeds to T8, and a predetermined length from the tip (the minimum cutting length that can be clamped by the one-side clamping device and the two-side clamping device, that is, the clamping position of the two-side wire clamping device 100, and the cutting device The electric wire is fed by the electric wire feeder 10 for a distance between the position of the upper and lower claws 200 and a predetermined length), and is cut out by the above-described dispensing device 800. That is, if a predetermined time elapses in the clamped state, the impression of the clamp remains on the coating, which may hinder the subsequent strip operation. Therefore, when a predetermined time elapses, the portion from the tip to the portion where the indentation remains (clamped portion) is cut and discharged as a defective product.
If the predetermined time has not elapsed at T7, the process returns to T2. Further, at T7, regardless of the elapsed time, all of the electric wires once clamped by the clamping device may be cut out after the indented portion is cut off.

  Thereby, shrinkage | contraction of the core wire (or coating | cover) in the front-end | tip of the 1 side electric wire during a pause can be suppressed.

DESCRIPTION OF SYMBOLS 1 Terminal crimping electric wire manufacturing apparatus 3 Machine stand 10 Electric wire feeding apparatus 20 Straightening apparatus 100 1 side electric wire clamp apparatus 110 Clamp unit 120 Clamp part 140 Housing 150 Clamp bracket 160 Moving mechanism 170 Turning mechanism 200 Cutting apparatus 210 Cutting part 220 Driving part 300 Two-side electric wire clamping device 400 Peeling device 410 Cutting / strip unit 420 Drive unit 500 Terminal crimping device 600 Peeling device 700 Terminal crimping device 800 Dispensing device

Claims (9)

A method of stripping a coating after cutting an electric wire having a core wire and a peripheral coating into a certain length,
A method for peeling an electric wire, characterized in that, after cutting (length determining cut) for setting the length of the electric wire, the end of the length determined cut is cut again by a small amount (end-aligned cut), and then the coating is peeled off. A method of cutting an electric wire having a core wire and a peripheral coating to a certain length, then stripping the coating, and then crimping a terminal,
A terminal crimping method characterized by cutting a small amount of the end of the length-determined cut (end-aligned cut) between the cutting (length-decision cut) for setting the wire length and the terminal crimping. . A method of stripping a coating after cutting an electric wire having a core wire and a peripheral coating into a certain length,
A method for peeling an electric wire, characterized by holding a wire outer surface nearest to a cutting position with a clamp during a temporary stop for changing the length of the electric wire. A method of cutting an electric wire having a core wire and a peripheral coating to a certain length, then stripping the coating, and then crimping a terminal,
A wire crimping method characterized by holding the outer surface of the wire nearest to the cutting position with a clamp during primary stop for changing the length of the wire or changing the terminal type. An apparatus for stripping a coating after cutting an electric wire having a core wire and a peripheral coating into a certain length,
A cutter for cutting (length determining cut) for setting the wire length;
A cutter that cuts the cut end part by a small amount again (end alignment cut),
An electric wire peeling apparatus comprising:   Furthermore, the electric wire peeling apparatus of Claim 5 provided with the cutter which peels off the said coating | coated (stripping). An apparatus for cutting an electric wire having a core wire and an outer periphery coating to a certain length, then stripping the coating, and then crimping a terminal.
A cutting device for cutting (length determining cut) for setting the wire length;
A cutting device that cuts the end of the wire after the length has been cut by a small amount again (end cut),
A strip device for stripping the coating on the tip of the wire;
A device for crimping a terminal to the tip of the wire from which the coating has been removed;
A terminal crimping apparatus comprising: A device for stripping a coating after cutting an electric wire having a core wire and a peripheral coating into a certain length,
A cutting device for cutting (length determining cut) for setting the wire length;
A cutting device that cuts the end of the wire after the length has been cut by a small amount again (end cut),
A strip device for stripping the coating on the tip of the wire;
A clamp device that clamps the outer surface of the electric wire nearest to the cutting position during a temporary stop for changing the length of the electric wire,
An electric wire peeling apparatus comprising: An apparatus for cutting an electric wire having a core wire and an outer periphery coating to a certain length, then stripping the coating, and then crimping a terminal.
A cutting device for cutting (length determining cut) for setting the wire length;
A cutting device that cuts the end of the wire after the length has been cut by a small amount again (end cut),
A strip device for stripping the coating on the tip of the wire;
A device for crimping a terminal to the tip of the wire from which the coating has been removed;
A clamp device that clamps the outer surface of the wire closest to the cutting position during the primary stop for changing the length of the wire or changing the terminal type, etc.
A terminal crimping apparatus comprising:

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