CN113067230B - Wire coating layer stripping device, terminal crimping device, wire end processing device, terminal crimping wire manufacturing device and manufacturing method - Google Patents

Abstract

The invention provides an electric wire coating stripping device capable of reliably dropping firmly attached coating broken chips. The wire coating layer stripping devices (23, 33) are provided with: a plurality of stripping blades (231, 233), the plurality of stripping blades (231, 233) being provided in pairs, the plurality of stripping blades (231, 233) cutting cuts from two directions in a coating layer at an end of the electric wire (W); and a clamp (211) for holding a base side part of the end part of the electric wire. The wire coating stripping device (23, 33) further includes a coating chip breaking knock-out member (241), and the coating chip breaking knock-out member (241) is reciprocally driven between a position in contact with a coating portion (WK) (fig. 4 (D)) attached to the front side of the stripping blade (231, 233) and a position separated from the position.

Description

Wire coating layer stripping device, terminal crimping device, wire end processing device, terminal crimping wire manufacturing device and manufacturing method

The present application is a divisional application of a wire coating layer peeling device, a terminal crimping device, a wire end processing device, a terminal crimping wire manufacturing device, and a manufacturing method, having a filing date of 2019, 1, 30, and a filing number of 201910093327.0.

Technical Field

The present invention relates to a device for peeling (peeling) a coating layer (skin) of an end portion of an electric wire, and a device for crimping a terminal after peeling the coating layer. In particular, it relates to a method for producing a wire with a relatively large diameter (e.g. a strand cross-sectional area of 8sq (mm) ² )～20sq(mm ² ) A coating layer peeling device, a terminal crimping device, etc. used for the electric wire.

Background

In order to automatically crimp a terminal to a thick wire or an aluminum wire having a low core strength of the wire, as described below, it is required to cope with (1) a problem of coating breakage (peeling breakage) and (2) a problem of bending caused by wire elongation at the time of terminal crimping.

(1) Chip breaking for coating layer

A coating layer peeling knife (cutting knife, cutting む blade) having a semicircular arc shape corresponding to the combined diameter (strand diameter) of the core wire of the electric wire is generally used to peel the coating layer of the thick electric wire. In addition, when peeling off the coating layer of the electric wire other than the thick electric wire, a diamond-shaped blade is generally used. This is because, in the case of a thick wire, when a diamond-shaped blade is used, the remaining portion of the covering layer where no notch is formed becomes large, and resistance when pulling back the wire and tearing the portion where no notch is formed (see fig. 3 (C), paragraph 0034, etc.) increases, which is not preferable. In addition, the tear portion is irregular in shape, which leads to failure and deterioration in quality at the time of crimping the terminal.

In a thick electric wire wound around a reel, a core wire twisted in combination with an arc at the time of manufacturing may be deformed into an elliptical shape by the weight of the electric wire itself or tension generated by winding around the reel. In this case, although the coating layer is notched by the semicircular blade, the broken chips of the peeled coating layer may be caught by the blade portion. When the subsequent work is continued in this state, quality degradation such as a defective notch shape of the coating layer may occur, and it is necessary to reliably remove the adhered coating layer chip.

As a means for removing the coating layer chip, japanese patent application laid-open No. 2009-55766 (patent document 1, manufactured by the co-ltd) is available. In the technique of patent document 1, the coating layer removing sheet moves in the wire side center direction in conjunction with the closing operation of the stripping blade by the swinging operation, and after the coating layer is stripped, the coating layer removing sheet is held and the opening operation is performed with a delay from the opening operation of the stripping blade, whereby the coating layer broken chip is removed from the stripping blade.

(2) Wire elongation at crimping

When the terminal is crimped to a thick electric wire, the core wire of the electric wire has a relatively large diameter, and thus the core wire is considerably stretched during crimping of the terminal. If measures for absorbing the elongation of the wire are not taken, there is a possibility that the wire is bent and the core wire is buckled.

As a method for absorbing elongation of an electric wire in order to prevent the electric wire from bending, japanese patent application laid-open No. 2015-211039 (patent documents 2 and KOMAX) is available. In the technique of patent document 2, the wire feeding holder is operated in the wire axial direction in response to the wire core wire elongation generated during crimping, so as to prevent bending and buckling of the wire. The technique of patent document 2 requires sensing of the elongation state (elongation force, elongation dimension) of the wire core wire and complicated synchronous control of an actuator that drives the wire feeding holder.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2009-55766

Patent document 2: japanese patent application laid-open No. 2015-211039

Disclosure of Invention

Problems to be solved by the invention

The invention aims to provide an electric wire coating layer stripping device which can reliably lead firmly attached coating layer broken scraps to fall off. Alternatively, an object of the present invention is to provide a terminal crimping device having a wire elongation absorbing mechanism of a relatively simple structure, which can absorb a core wire elongation generated at the time of terminal crimping to prevent bending and buckling of a wire.

Solution for solving the problem

In this "means for solving the problem" and "claims" and in a part of the specification, bracketed parts represent reference numerals of the respective parts of the drawings, but this is for reference only and does not limit the scope of the claims to the content of the drawings.

The invention provides an electric wire coating layer stripping device, which is characterized by comprising: a plurality of stripping blades (231, 233), the plurality of stripping blades (231, 233) being provided in pairs, the plurality of stripping blades (231, 233) cutting cuts from two directions in a coating layer at an end of the electric wire (W); a peeling knife driving member (248) that opens and closes between the plurality of peeling knives (231, 233); a clamp (211) for holding a base side portion of an end portion of the electric wire; and a clamp conveying unit (21, 31) that drives the clamp to insert the end portion of the electric wire between the plurality of stripping blades (231, 233) after opening, pulls the base side portion after the stripping blade cuts the notch, leaves a coating portion (WK) in front of the notch on the front side of the stripping blade and strips the coating portion (WK), wherein the electric wire coating stripping device (23, 33) further includes a coating breaking and knocking-off member (241), and the coating breaking and knocking-off member (241) is reciprocally driven between a position contacting the coating portion (coating breaking) (WK) in front of the front side attached to the stripping blades (231, 233) and a position separated from the position.

The above-described "a plurality of paired peeling blades that cut out the slit from two directions" does not exclude three or more peeling blades from the meaning. The term "reciprocation" includes two or more reciprocations. The chip breaking and knocking-off member includes a member (for example, reference numerals 241, 241A, 241B in fig. 5) that knocks off the coating layer attached to the blade portion, and a member (for example, reference numeral 241C in fig. 5) that grips and conveys the coating layer broken chip.

The actuator of the coating layer chip breaking knock-out unit includes a structure using an electromagnetic solenoid or the like, in addition to the cylinder. In addition, the shape of the removal plate is deformed to tilt the striking direction, so that the coating layer chip can be easily peeled off. Specifically, reference is made to fig. 5 and described later. In addition, by simultaneously performing the charge-removing air blowing, the vacuum pumping, and the like, the removal performance is improved, and the versatility of the electric wire is increased to be applicable to a thin electric wire (attached to a stripping blade by electrostatic adhesion) and the like. It can be said that the air outlet (including the charge blowing) and the vacuum apparatus can be easily combined with the coating layer discharge guide path (discharge chute, piping), the removal movable plate, and the like.

The stripper blade driving member 248 preferably uses a servo mechanism capable of adjusting the cutting amount of the upper stripper blade into the coating layer for each wire size, such as the lowering position. The wire inserting mechanism of the clamp feeding units 21 and 31 is preferably a servo mechanism. The specific details will be described later in the description of the embodiments of the invention.

The present invention provides a terminal crimping device (300), the terminal crimping device (300) comprising: a terminal crimping machine (27, 37) which crimps a terminal (T) to the end of the wire (W) after the coating layer is stripped; and wire clamping and conveying parts (21, 31) which hold the wire and insert the end of the wire into the terminal crimping machine, wherein the terminal crimping device (300) is characterized in that the wire clamping and conveying parts (21, 31) comprise: a clamp (211) for holding a base side portion of an end portion of the electric wire; a jig driving member (348) for driving the jig to insert the end portion of the electric wire into the crimping machine (27, 37); and an elongation absorbing mechanism (320) for retracting the clamp (211) in accordance with the wire elongation at the time of terminal crimping, wherein the elongation absorbing mechanism (320) comprises: a telescopic urging member (323) that urges the jig (211) in the direction of the press-bonding machine, receives a force equal to or greater than a set value in a direction opposite to the insertion direction, and deforms the jig; and a biasing force adjustment member (327) that adjusts the force at the start of expansion and contraction of the expansion and contraction biasing member (323).

The jig may further comprise an insertion position regulating member (329), wherein the insertion position regulating member (329) regulates an insertion position of the jig (211) biased by the expansion and contraction biasing member (323). In the terminal crimping device of the present invention, the expansion and contraction urging member (323) can be a spring. The biasing force adjusting member 327 and the insertion position regulating member 329 may be screw members such as bolts.

By adopting a structure in which a mechanism using an expansion and contraction urging member (323) such as a spring is additionally used, it is possible to absorb the wire elongation of different sizes in terminal crimping of wires of various sizes. In addition, complicated sensors and complicated control are not required.

The present invention provides another terminal crimping device (400), the terminal crimping device (400) comprising: a terminal crimping machine (27 ', 37') for crimping a terminal (T) to the end of the wire (W) from which the coating layer is stripped; and wire clamping and conveying parts (21 ', 31') which hold the wire and insert the end of the wire into the terminal crimping machine, wherein the terminal crimping device (400) is characterized in that the wire clamping and conveying parts (21 ', 31') comprise: a clamp (411) for holding a base side portion of an end portion of the electric wire; a jig driving member (448) for driving the jig to insert the end portion of the electric wire into the crimping machine (27 ', 37'); and an elongation absorbing mechanism (420) for retracting the clamp (411) in accordance with the wire elongation at the time of terminal crimping, wherein the elongation absorbing mechanism (420) comprises: a start-extension crimp height detecting member that detects whether or not a crimp height at which a core wire of the electric wire starts to extend due to terminal crimping has been reached; and a cylinder (423) that operates in synchronization with the initial extension crimp height detection member and allows the clamp (411) to retract.

The initial extension crimp height detection means is, for example, a lowering position detector of an up-and-down driving mechanism of the crimper (275, refer to fig. 9). The cylinder 423 may be an air pressure cylinder or an electric cylinder with a servo function that can perform torque control. As long as a structure that can be synchronized with the descending stroke of the press-contact press or the like is obtained, a non-constant elongation can be handled by using a cylinder that uses an atmospheric opening direction control valve or the like, or an electric cylinder that can perform torque control.

In particular, as the cylinder (423), a pneumatic cylinder is preferable, and a valve (5-port neutral discharge type (atmosphere open type) directional control valve 463 or the like) for discharging or discharging the air in the pneumatic cylinder in synchronization with the start extension pressure contact height detecting means is attached to the cylinder (423). If the mechanism in which the 5-port directional control valve for neutral position exhaust is combined with the cylinder is provided by synchronizing the pressure-contact height with the mechanism in which the cylinder and the pressure control valve are combined, a higher-level expansion absorbing mechanism is provided. The following operation flow may be adopted: when the pressure-bonding height at which the core wire starts to extend due to the pressure bonding is reached, the pressure bonding is temporarily stopped, and at the same time, a signal is output to the directional control valve, and thereafter the pressure bonding is continued.

Further, the front-back operation of the wire clamping and conveying parts (21, 31) is changed from the driving of the ball screws (347, 348) to the driving of the electric cylinders with servo functions, and the servo excitation is turned off or the torque is reduced in synchronization with the pressure welding height at which the core wire starts to stretch due to the pressure welding, thereby absorbing the wire elongation. In this case, the structure becomes simpler than the rack-and-pinion structure of patent document 2.

The invention provides a terminal crimping wire manufacturing device (1), which comprises: a wire feeding unit (11) that feeds a wire (W1); an electric wire cutting unit (15) that cuts the supplied electric wire to an arbitrary length; wire coating layer peeling sections (23, 33) for peeling off the coating layers at the ends of the wires (W2, W3); terminal crimping parts (27, 37) for crimping the terminal to the end part of the electric wire with the coating layer stripped; and a clamping and conveying part (21, 31) which clamps the electric wire and conveys the electric wire to each part, wherein the electric wire coating stripping part (23, 33) is the electric wire coating stripping device (23, 33), or the terminal crimping part (27, 37) and the clamping and conveying part (21, 31) form the terminal crimping device (300, 400).

The invention provides a manufacturing method of an end treatment wire, which comprises the following steps: a step of feeding the electric wire; cutting the fed wire into an arbitrary length; a coating layer peeling step of peeling off the coating layer at the end of the electric wire; and a terminal crimping step of crimping a terminal to an end of the electric wire from which the coating layer is peeled, wherein the electric wire coating layer peeling device is used in the coating layer peeling step or the terminal crimping device is used in the terminal crimping step.

ADVANTAGEOUS EFFECTS OF INVENTION

As is clear from the above description, in the wire coating layer peeling device according to the present invention, the coating layer broken chip is reliably removed from the peeling blade, and thus the quality relating to the wire coating layer peeling mode can be maintained and improved. In addition, the chip breaking chute (251) has a channel structure and a structure surrounded by the coating layer chip breaking and knocking-off member (241), thereby forming a guide path for discharging the broken chips, and further having the effect of preventing the scattering of the coating layer broken chips.

In the terminal crimping device of the invention, the extension of the wire during terminal crimping is absorbed by using the telescopic force application member (323), the cylinder (423) and the like, and the wire extension of different sizes of wires in terminal crimping can be absorbed without complex synchronous control and sensing. This can improve the quality of a terminal-crimp electric wire product free from bending and buckling of the electric wire.

Drawings

Fig. 1 is a plan view schematically showing the overall structure of a terminal crimping wire manufacturing apparatus according to an embodiment of the present invention.

Fig. 2 is a perspective view schematically showing the configuration of an electric wire coating layer peeling device (chipping removing mechanism) according to an embodiment of the present invention.

Fig. 3 is a schematic side view showing the operation of the wire coating layer peeling device of fig. 2.

Fig. 4 is a schematic side view showing an operation of the wire coating layer peeling device of fig. 2.

Fig. 5 is a perspective view schematically showing a modification of the chip knocking-out mechanism of the wire coating layer peeling device.

Fig. 6 is a side view schematically showing the overall structure of a terminal crimping machine and a wire clamping and transverse feeding portion according to an embodiment of the present invention.

Fig. 7 is a diagram showing a configuration of a main portion of the wire elongation absorbing mechanism in the wire clamping and laterally conveying portion of fig. 6, fig. 7 (a) is a side sectional view of the periphery of the coil spring 323, and fig. 7 (B) is a side sectional view of the periphery of the stopper bolt 329.

Fig. 8 is a perspective view of a main portion of the wire elongation absorbing mechanism of fig. 7.

Fig. 9 is a side view for explaining the action of the wire elongation absorbing mechanism. Fig. 9 (a) is a diagram of an embodiment of the present invention, and fig. 9 (B) is a diagram illustrating a problem of the related art.

Fig. 10 is a side view schematically showing the overall structure of a terminal crimping device 400 according to another embodiment.

Fig. 11 is an exploded perspective view showing the structure of the elongation absorbing mechanism 420 of the terminal crimping apparatus 400 of fig. 10.

Fig. 12 is a side view of the elongation absorbing mechanism 420 of fig. 11.

Fig. 13 is a side view schematically showing the arrangement states of the wire feeding section 11, the grip conveying sections 21 and 31, the wire cutting section 15, and the wire pulling-out length measuring device 17 in the terminal crimping wire manufacturing apparatus according to the embodiment of the present invention.

Fig. 14 is a diagram showing a structure of a wire pull-out length measuring device according to an embodiment of the present invention, including first length measuring members 1780, 1783, 1790 and second length measuring members 2120, 2125 for measuring the length of the wire W. Fig. 14 (a) is a side view of the grip conveying section 21, fig. 14 (B) is a front view of the second length measuring members 2120, 2125, and fig. 14 (C) is a side view of the wire pullout length measuring device 17.

Fig. 15 is a block diagram of a measurement system of the wire pull-out length measurement device of fig. 14.

Fig. 16 is a side view schematically showing the structure of a pullout head retraction member (such as a cylinder 1716) in the wire pullout length measurement apparatus 17 according to the embodiment of the present invention.

Fig. 17 is a schematic configuration and a perspective view showing the operation of the wire rotating portion 32 of the wire both-end terminal crimping device according to the embodiment of the present invention. Fig. 17 (a) shows a state in which the base WB of the wire W3 is inserted into the clamp 3201 of the wire rotating unit 32, fig. 17 (B) shows a state in which the rotating clamp 3201 is closed and the wire base WB is gripped, fig. 17 (C) shows a state in which the wire W3 is rotated 90 ° in the counterclockwise direction, and fig. 17 (D) shows a state in which the rotating clamp 3201 is opened and the wire W3 is stored in the rear clamp conveying unit 31.

Fig. 18 is a diagram showing a specific structure of the wire rotating portion 32 of fig. 17, where fig. 18 (a) is a side view and fig. 18 (B) is a front view.

Fig. 19 is a side view of a crimping machine 2700 according to an embodiment of the present invention.

Fig. 20 is a front view of the crimping machine 2700 of fig. 19.

Fig. 21 is a side view of the terminal crimping machine 2800 after the applicator changing function is improved.

Fig. 22 is a plan view of the terminal crimping machine 2800 of fig. 21.

Description of the reference numerals

W, an electric wire; WK, cladding layer portion; w1, the wire conveyed; w2, cutting off the electric wire at the front end; w3, cutting off the electric wire back and forth; t, T1, T2, terminals; 11. a wire feeding section; 15. a wire cutting section; 17. a wire pull-in length measuring section; 20. a travel track; 21. a front clamping and conveying part; 23. wire coating layer peeling means (wire coating layer peeling section, front coating layer peeling section); 25. a front inspection section; 27. a terminal crimping machine (terminal crimping part, front terminal crimping part); 30. a travel track; 31. a rear clamping conveying part; 32. a wire rotating section; 33. wire coating layer peeling means (wire coating layer peeling section, rear coating layer peeling section); 35. a rear inspection section; 37. a terminal crimping machine (terminal crimping part, rear terminal crimping part); 41. a product receiving portion; 211. a clamp; 213. a clamp base; 215. a clamp opening and closing mechanism (cylinder); 217. a clamp opening and closing mechanism base; 218. a stand; 219. an up-and-down moving cylinder with a guide; 231. a peeling knife (upper knife); 233. stripping knife (lower knife); 237. 238, a slider; 241. coating broken chip knocking-off members (plates); 241A, 241B, 241C, coating chip breaking knockout member; 241x, jaw members; 243. a driving member (actuator, cylinder); 244. an air nozzle; 247. upper and lower guide rails (columns); 248. a peeling knife driving member (motor); 249. a ball screw with a linear motion guide for opening and closing the peeling knife; 251. chip breaking chute; 275. a crimping device; 283. an anvil; 300. a terminal crimping device; 320. an extension absorption mechanism; 321. a stand; 321r, platen; 321t, a spring accommodating hole; 321w, rear end face; 321x, internal threads; 323. a telescopic urging member (coil spring); 327. a force application adjustment member (adjustment bolt); 327b, a front end; 327f, a central portion; 328. a lock nut; 329. a stop bolt; 329b, external threads; 329f, a cylindrical portion; 329h, end face; 329j, hexagonal hole-carrying portion (head); 331. a bolt implantation plate; 331g, through holes; 331k, rear side; 333. an electric wire elongation absorbing slider; 335. a guide; 341. a front and rear sliding plate; 343. a slider; 345. front and rear guides; 347. a ball screw; 348. a motor (jig driving section); 351. a lateral sliding table; 400. a terminal crimping device; 411. a clamp; 419. an up-and-down moving cylinder with a guide; 420. an extension absorption mechanism; 421. a stand; 423. a cylinder; 423b, a rod; 429. stop bolts (positioning bolts); 430. implanting a plate bolt into the plate; 431g, through holes; 432. a block; 433. an electric wire elongation absorbing slider; 435. a guide; 445. front and rear guides; 448. a motor (jig driving section); 451. a lateral sliding table; 463. a directional control valve; WL, wire reel; 10. a reel bracket; 1000. wire feeding/pulling-out length measuring means; 1110. a straightener; 1111. 1113, 1115, 1117, rollers; 1501. a knife; 1701. a clamp; 1705. a pull head; 1710. an overload release slide; 1711. an overload release track; 1716. a retreat member (cylinder); 1716b, a rod-side chamber; 1717. a piston rod; 1718. a piston; 1718c, rear face; 1719. a pressure regulating valve; 1720. an air piping; 1723. a motion detection means (magnetic sensor); 1731. a mobile station; 1770. a head moving member; 1771. a head moving rail; 1780. a moving belt (timing belt); 1783. a driving belt wheel; 1784. a driven pulley; 1790. a moving motor; 1795. an encoder; 1798. a length difference calculating section; 2101. 2103, clips; 2120. an auxiliary length measuring roller; 2123. a cylinder; 2125. revolution counter (encoder); 2130. the wire passes through the channel; 2141. a wire guiding transverse roller; 2145. a wire guiding longitudinal roller; 3101. a clamping piece; WB, a base of the wire W3; 31. a rear clamping conveying part; 3101. a conveying clamp; 3102. a stage; 32. a wire rotating section; 3201. rotating the clamp; 3201b, 3201c, clips; 3201g, mountain portion; 3201j, valley; 3203. a clamp opening and closing mechanism; 3207. a rotating body; 3211. a frame; 3220. a rotating member of the opening/closing mechanism; 3221. a large belt wheel; 3223. a synchronous belt; 3225. a small belt wheel; 3227. a rotary motor; an AP, an applicator; APE, end feed applicator; APS, side feed applicators; 2700. a terminal crimping machine; 2701. a pressure head; 2703. a pressure head bolt; 2707. a handle; 2711. a crimp (upper die); 2715. a terminal feeding mechanism; 2721. anvil (lower die); 2724. an anvil holder; 2727. an applicator base; 2731. a ram holder (upper link lever); 2731h, 2731m, left and right sides; 2734. tie rods (guide rods, struts); 2735. a bushing; 2739. a slide rail; 2739b, track grooves; 2739c, applicator mount; 2739t, sides; 2741. an applicator stage (lower die stage); 2741h, 2741m, left and right sides; 2741x, operating position; 2742. 2743, base fixed jaw; 2742b, 2743b, faces; 2745. a lever guide; 2750. a window; 2751. a driven pulley; 2754. a belt; 2757. a driving belt wheel; 2761. a bearing holder; 2764. bearings (bearing housings); 2767. nut holders (lower tie bars); 2767h, 2767m, left and right sides; 2771. feed nuts (nut boxes); 2781. a feed screw; 2791. a motor reducer; 2794. a motor; 2800. a terminal crimping machine; 2821. a track; 2823. slide rail (side table); 2823b, track grooves; 2823y, standby position; 2831. a stand; 2871. a slide rail; 2871b, a track groove; 2871t, rear end; 2871y, stand-by position.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing, the front-rear direction is the axial direction of the wire W, the left-right direction (lateral direction) is the direction in which the wire gripping and conveying section laterally grips the wire W, and the up-down direction is the lifting direction of the crimp connector and the cover peeling upper blade (not limited to the direction of the earth gravity).

First, the overall structure of the terminal crimping wire manufacturing apparatus for rough-body according to the embodiment of the present invention will be described with reference to fig. 1.

The terminal crimping wire manufacturing apparatus 1 includes the following parts.

And an electric wire feeding section 11 for feeding the electric wire W1 in the longitudinal direction from a wire harness (not shown) wound in a roll shape.

And a cutting section 15 for cutting the fed electric wire W1 and determining the length of the cut electric wire W3.

And a wire-drawn length measuring unit 17 for drawing the wire having passed through the cutting unit 15 forward. The position corresponding to the length of the terminal crimping wire as a product is stopped, and the wire rear end is cut off. The electric wire with the two ends cut is referred to as a cut-back electric wire W3.

A front grip conveying section 21 that grips and conveys an end of the electric wire (front end cut electric wire) W2 in the lateral direction. The front grip conveying section 21 conveys the electric wire W2 from the electric wire conveying position L0 to the left to the crimping position L-3, and then returns to L0.

A travel rail 20, and a front grip conveying unit 21 travels on the travel rail 20.

And a front coating layer peeling section 23 for peeling the coating layer of the electric wire W2 having the front end portion cut.

And a front inspection unit 25 for inspecting the peeling state of the coating layer at the front end portion of the electric wire.

A front terminal crimping part 27 that crimps the terminal T1 to the front end of the electric wire W2.

And a rear clamping and conveying part 31 which clamps the cut-off wire W3 before and after and conveys it in the lateral direction. The rear grip conveying section 31 receives the wire W3 at the wire pull-in length measuring section 17 (wire conveying position L0), conveys the wire W3 rightward to the crimping position L4, delivers the wire W3 to the product receiving section 41, and then returns to L0.

A travel rail 30, and a rear grip conveying unit 31 travels on the travel rail 30.

And a wire rotating part 32 for rotating the rear end of the wire around the axis center to align the crimping position (posture) of the rear end terminal around the axis with a predetermined position.

And a rear coating layer peeling section 33 for peeling the coating layer of the electric wire W3 having the rear end portion cut.

And a rear inspection unit 35 for inspecting the peeling state of the coating layer at the rear end portion of the electric wire.

A rear terminal crimping portion 37 that crimps the terminal T2 to the rear end of the electric wire W3.

And a product receiving unit 41 for receiving the product wire sent out and having terminals crimped at both ends.

The coating layer peeling devices 23 and 33 will be described with reference to fig. 2 to 4. The direction shown in fig. 2 is a direction for the front cover peeling (peeling) portion 23. As shown in the drawings, the coating peeling devices 23 and 33 have an upper blade 231 and a lower blade 233 for cutting a notch in the coating layer of the electric wire. In this embodiment, both the lower blade 233 and the upper blade 231 can move up and down. Specifically, the upper blade 231 is mounted on the side of the upper slider 237, and the lower blade 233 is mounted on the side of the lower slider 238. The two sliders 237 and 238 are driven in the up-down direction along the up-down guide rail (column) 247 by a ball screw 249 with a linear motion guide for opening and closing the peeling blade and a motor (peeling blade driving member) 248 thereof. Here, threads (left-handed threads and right-handed threads) having opposite screw directions are formed in the upper half and the lower half of the ball screw 249, and the respective sliders 237, 238 are driven in a direction away from each other (knife open) or in a direction approaching each other (knife close) by the rotation of the ball screw 249.

A chip breaking knock-out member (plate) 241 for knocking out the coating layer chip and an up-down driving actuator (cylinder) 243 thereof are mounted on the side face (right face in fig. 2) of the upper slider 237. Their actions are described below. A chip breaking chute 251 that guides the broken chips that drop is provided below the chip breaking knock-out plate 241. Although not shown in fig. 2, an air nozzle for blowing an air flow to the coating layer chip is also provided.

The operation of the coating layer peeling devices 23 and 33 will be described with reference to fig. 3 and 4. Fig. 3 and 4 are schematic views, and there is no correspondence between the shape and size and fig. 2.

Fig. 3 (a) shows a state in which the stripping blades 231 and 233 are in the initial position after the blades are opened, and the end portion of the electric wire W is inserted between the two blades. The chip breaking knock-out plate 241 is in a lifted state.

Fig. 3 (B) shows a state in which the stripping blades 231 and 233 are closed to clamp the electric wire W. The tips of the two blades cut into the coating layer of the wire W. The closing positions of the stripping blades 231 and 233 are selected by servo control of a motor (stripping blade driving member) 248 and positioned at positions corresponding to the thickness of the wire W and the thickness of the coating layer. In addition, when the wire W is thick, the shape of the blade varies depending on the type of the wire W.

Fig. 3C shows a state (pulled-back state) in which the stripping blades 231 and 233 are slightly opened from the state (B) of fig. 3 and the electric wire W is pulled in a direction away from the blades 231 and 233. The pulling of the electric wire W means that the grip delivery portions 21, 31 (see fig. 1 and 6 (described later)) move in the axial direction of the electric wire W in a state where the electric wire W is gripped. Thus, the portion (coating broken chip WK) of the wire coating layer that is located forward (left side in the drawing) of the blades 231 and 233 is separated from the tip portion of the wire W and remains on the left side of the blades. The core wire WC is exposed at the tip end of the wire W after being pulled.

In fig. 4 (D), after the coating broken chip WK leaves the wire W, the stripping blades 231, 233 are slightly opened from the state (C) of fig. 3, and the upper and lower blades 231, 233 are half-opened. In this state, the coating chip breaking WK is sandwiched between the upper and lower blades 231 and 233. Here, the chip breaking knock-out plate 241 is moved up and down several times to knock out the coating layer chip breaking WK. The coating broken chip WK falls into the chute 251. The chip breaking knock-out plate 241 is operated, and an air flow is blown from the air nozzle 244 to the coating chip breaking WK. The cover chip breaking WK is dropped in a state where the upper and lower blades 231 and 233 are half-opened so that the cylinder stroke position of the driving member (actuator, cylinder) 243 that drives the chip breaking knock-out plate 241 is at a position that is considered.

Thereafter, as shown in fig. 4 (E), the upper blade 231 and the lower blade 233 are opened to the initial positions, and the wire W with the coating layer peeled off is transported to the subsequent steps.

Fig. 5 is a perspective view schematically showing a modification of the chip knocking-out mechanism of the wire coating layer peeling device. The chip-breaking knock-out member 241A of fig. 5 (a) is a member formed by attaching a bar-like or projection-like object to the reduced chip-breaking knock-out plate 241. The chip breaking knock-out member 241A is driven up and down in the same manner as the chip breaking knock-out plate 241, and the coating layer is broken and peeled off. The bar-shaped or projection-shaped knock-out member 241A has an advantage in that the coating layer is knocked out from obliquely above by attaching the chip-breaking knock-out member 241A at a position slightly offset from the center position of the coating layer, and the coating layer chip-breaking caught on the upper blade 231 or the lower blade 233 is easily dropped.

The chip breaking knock-out member 241B of fig. 5 (B) is a tapered member, and a portion of the front side in contact with the coating layer chip breaking is thicker. The chip breaking knock-out member 241B is driven up and down in the same manner as the chip breaking knock-out plate 241, and the coating layer is broken and peeled off. The advantage of the tapered chip-breaking knock-out member 241B is that it is in contact with the attached coating chip-breaking from the lateral portion, causing the coating chip-breaking to fall off along an oblique angle, and thus the coating chip-breaking is knocked out equally easily.

The chip breaking and knocking out member 241C shown in fig. 5 (C) is a chuck type, and includes a pair of openable and closable claw members 241x and a mechanism for moving the claw members. The coating broken chip is gripped by the chuck and peeled off from the peeling knife, and is conveyed to the chute or the suction unit, where the chuck 241x is opened to carry away the coating broken chip.

The above-mentioned stripper blade driving member (248) preferably uses a servo mechanism capable of adjusting the wire size for each wire to control the opening and closing positions of the upper and lower stripper blades, in particular, the cutting amount of the stripper blade with respect to the coating layer, and the position control in the half-open state of fig. 3 (C). The wire insertion mechanism (specifically, the forward/backward sliding motor 348 (fig. 6)) of the gripping and conveying units 21 and 31 is also preferably a servo mechanism. This enables fine control of the peeling length adjustment, the coating peeling operation, and the pressure bonding position adjustment.

Referring to fig. 6 to 9, a terminal crimping machine and a wire clamping and traversing device according to an embodiment of the present invention will be described. Fig. 6 is a side view schematically showing the overall structure of the device. Fig. 7 is a side sectional view showing the structure of the elongation absorbing mechanism of the wire clamping and transverse feeding portion of fig. 6. Fig. 8 is a perspective view of the elongated absorbing mechanism of fig. 7. Fig. 9 is a schematic side view for explaining the action of the elongation absorbing mechanism of fig. 7. Fig. 9 (a) is a diagram of an embodiment of the present invention, and fig. 9 (B) is a diagram illustrating a problem of the related art.

The main device shown in fig. 6 has an overall structure including terminal crimping portions 27 and 37 and clamp conveying portions 21 and 31.

As shown in fig. 9, the terminal crimping portions 27, 37 crimp the terminal T to the end of the electric wire W from which the coating layer is peeled off. The terminal crimping portions 27, 37 have a crimper 275 which is an upper pressing tool capable of being lifted and lowered, an anvil 283 which is a lower fixing tool, and the like.

The clamp conveying sections 21 and 31 include a clamp 211 for holding the wire W and a mechanism 215 for opening and closing the clamp. The jig base 213 on which the jig 211 is mounted on a jig opening/closing mechanism 215, and the jig opening/closing mechanism 215 is mounted on a jig opening/closing mechanism base 217, and the jig opening/closing mechanism base 217 includes an up-and-down mechanism at the time of press-contact. The clamp opening and closing mechanism base 217 is fixed to the stage 218. The stage 218 is mounted on a stage 321 of the wire extension absorbing mechanism 320 via a vertically moving cylinder 219 with a guide.

The stage 321 of the wire extension absorbing mechanism 320 is mounted on the wire extension absorbing slider 333, and is slightly slidable in the front-rear direction on the guide 335 and the front-rear sliding plate 341. The wire elongation absorbing mechanism 320 is one of the characteristic parts of the present invention, and is described in detail later with reference to fig. 7, 8, and 9.

The front-rear slide plate 341 is mounted on a slider 343 (see fig. 8) and is slidable along a front-rear guide 345 extending in the front-rear direction. The slider 343 is driven by a ball screw 347 and a motor 348. The front-rear guide 345 is mounted on the lateral slide table 351 and is movable along rails 20, 30 (see also fig. 1) extending in the lateral direction.

As shown in fig. 7, the wire extension absorbing mechanism 320 includes a coil spring 323, an adjustment bolt 327 of the coil spring 323, and other main parts in addition to the stand 321 and the slider 333.

The coil spring 323 is accommodated in a spring accommodating hole 321t engraved in the platen 321r of the stage 321. The spring receiving hole 321t extends in the front-rear direction, and a rear end of the spring receiving hole 321t opens at a rear end surface 321w of the platen 321 r.

The head portion (front end portion 327 b) of the spring adjustment bolt 327 enters a portion near the rear end of the spring accommodating hole 321t, and abuts against the rear end of the coil spring 323. The front-rear direction central portion 327f of the adjustment bolt 327 is screwed into the internal thread 331f of the bolt implantation plate 331. As shown in fig. 6, the bolt implantation plate 331 is fixed to the rear end portion of the front-rear sliding plate 341 in an upward standing manner. When the bolt 327 is screwed into the female screw 331f and the bolt 327 is advanced forward, the coil spring 323 is compressed. The lock nut 328 is also screwed by the bolt 327, and can fix the position of the bolt 327 in the front-rear direction.

As can be easily understood from fig. 8, two stopper bolts 329 are provided on the left and right sides of the spring adjuster bolt 327. As shown in fig. 7B, the stopper bolt 329 is formed with an external thread 329B at a front side portion, a rear end portion of the stopper bolt 329 is a portion (head portion) 329j with a hexagonal hole, and a middle portion of the stopper bolt 329 is a cylindrical portion 329f. The front external screw 329b of the stopper bolt 329 is screwed into the internal screw 321x formed at the rear end portion of the platen 321r of the stage 321. Thus, the bolts 329 are fixed so as to extend rearward from the end surface 321w of the table 321 r.

The intermediate cylindrical portion 329f of the stopper bolt 329 is penetrated in a non-contact state into a through hole 331g formed in the bolt implantation plate 331. In the state of fig. 7, the front end face 329h of the head 329j of the stopper bolt 329 abuts against the rear side face 331k of the bolt implantation plate 331. This is because the platen 321r is biased toward the front side by the compression force applied to the coil spring 323, and the biasing force acts to pull the stopper bolt 329 fixed to the platen 321r toward the front side. As a result, the forward limit of the platen 321r is determined by the stopper bolt 329. The limit of the forward movement of the platen 321r ultimately determines the insertion position of the tip of the wire W into the terminal crimping portions 27, 37. When the coil spring 323 is contracted by pressing the clamp 211 against the extended wire at the time of terminal crimping, the stopper bolt 329 is retracted by an amount corresponding to the contraction.

In the state of fig. 7, when the spring adjuster bolt 327 is screwed (the spring adjuster bolt 327 is advanced), the coil spring (expansion/contraction urging member) 323 is compressed and urged (the set load at which expansion/contraction starts) to be stronger. On the other hand, when the spring adjuster bolt 327 is pulled out (the spring adjuster bolt 327 is retracted), the coil spring 323 is extended, and the biasing force (the set load for starting extension and retraction) becomes weak. As described below with reference to fig. 9, when the wire is stretched during terminal crimping, the clamp 211 holding the wire is pressed rearward, and the pressing force is transmitted to the stage 321. When the pressing force exceeds the above-described set load of the coil spring 323, the spring 323 contracts, and the stage 321 and the jig 211 retract (the extension absorbing slider 333 slides rearward on the guide 335).

The operation of the wire elongation absorbing mechanism will be described with reference to fig. 9. Fig. 9 (a) is a diagram of an embodiment of the present invention, and fig. 9 (B) is a diagram illustrating a problem of the related art. In the conventional technique of fig. 9 (B), since the retracting mechanism of the clamp 211 is not present, the wire W is bent in a V-shape upward in the figure under the influence of the wire extension at the time of crimping. On the other hand, in the embodiment of the present invention of fig. 9 (a), since the retracting mechanism of the clamp 211 is present, the clamp 211 is retracted by an amount corresponding to the wire elongation at the time of crimping, and thus the wire W is not bent.

Next, a terminal crimping device 400 according to another embodiment of the present invention will be described with reference to fig. 10, 11, and 12. Fig. 10 is a side view schematically showing the overall structure of the terminal crimping device 400. Fig. 11 is an exploded perspective view showing the structure of the elongation absorbing mechanism 420 of the terminal crimping apparatus 400 of fig. 10. Fig. 12 is a side view of the elongation absorbing mechanism 420 of fig. 11.

The main device 400 shown in fig. 10 has an overall structure including the terminal crimping portions 27', 37' and the clamp conveying portions 21', 31'. The terminal crimping portions 27', 37' of the main device 400 have the same structure and function as the terminal crimping portions 27, 37 of fig. 6. In the clamp conveying portions 21', 31' of the master device 400, the reference numerals 100 or 200 are added to the reference numerals of fig. 6, and the portions have the same functions. Specific correspondence is as described in the description column of the reference numerals.

The wire elongation absorbing mechanism 420, which is a characteristic part of the present embodiment, includes: a start-extension crimp height detecting member that detects whether or not a crimp height at which a core wire of the electric wire starts to extend due to terminal crimping has been reached; and a cylinder 423 that operates in synchronization with the initial extension crimp height detection member and allows the clamp 411 to retract. The initial extension crimp height detecting means is a lowering position detector of the up-down driving mechanism of the crimper (275, see fig. 9) of the crimp parts 27', 37'. When the up-down driving mechanism is of a servo press type, the lowering position of the presser can be grasped by the rotational position (encoder) of the driving motor. The initial expansion crimping height can be grasped for each type and size of the electric wire, and the value of the initial expansion crimping height can be stored in the controller of the device.

In this embodiment, the cylinder 423 is an air cylinder 423. The cylinder 423 is connected to a gas pressure regulator 461 and a 5-port neutral discharge type (atmosphere open type) directional control valve 463 via a gas pressure pipe (schematically shown by a single-dot chain line). The direction control valve 463 opens the atmosphere of the two chambers of the chamber on the side of the rod 423b and the chamber on the side opposite to the side of the rod in the pneumatic cylinder 423 by the detection signal of the start extension pressure contact height. Thereby, the cylinder 423 can move in the direction of the force applied to the lever 423 b.

That is, when the force accompanying the wire extension is applied in such a manner that the clamp 411 is retracted, the rod 423b of the cylinder 423 contracts by an amount corresponding to Δs shown in fig. 12. The block 432 and the jig 411 connected to the block 432 can be retracted by an amount corresponding to the amount of shrinkage. In the present embodiment, the following operation flow is adopted: when the crimp height at which the core wire starts to be elongated by the crimping is reached, the crimping is temporarily stopped, and at the same time, a signal is output to the direction control valve 463, and then the crimping is continued.

The stopper bolt (positioning bolt) 429 shown in fig. 11 has the same structure and function as the stopper bolt 329 of fig. 7. The left and right through holes 431g of the plate 430 are the same in structure and function as the through holes 331g of the bolt implantation plate 331 of fig. 7. The hole 430f in the center of the plate 430 is a through hole through which the rod of the cylinder freely moves. In fig. 10, bolts or the like for attaching the block 432 and the piston rod 432b are not shown.

Further, as a modification of the elongation absorbing mechanism, the forward and backward operation of the clamp conveying units 21, 31 may be changed from the driving of the ball screws 347, 348 to the driving of the electric cylinder with a servo function using the pressure control for thrust adjustment, and the servo excitation may be turned off or the torque may be reduced in synchronization with the pressure contact lower limit to absorb the wire elongation. In this case, the structure becomes simpler than the rack-and-pinion structure of patent document 2.

The wire pulling-out length measurement of the terminal crimping wire manufacturing apparatus of the present embodiment will be described. In thick wires, it is difficult to sufficiently remove the curl of the wire (Japanese style), and it is also difficult to measure the length of the wire cut length, due to the following circumstances. That is, since the weight per unit length of the wire becomes heavy, in the conventional method of the conveying roller system, when the load becomes large, slip occurs between the roller surface and the wire coating layer, and an error is likely to occur between the conveying amount on the roller side and the length of the wire actually conveyed. Further, since the material of the coating layer of the electric wire and the conductor structure inside the electric wire have large variations in friction coefficient and weight, the electric wire length error is liable to occur in the same manner as described above. Further, depending on the state of the package of the wire in the form of a spool, the outer diameter of the wire coating layer changes, and the grip position of the roller changes, which is prone to error.

Therefore, in order to accurately pull out the electric wire to a desired length (extend it along the long side), a labor is required. In addition, in recent years, electric vehicles and hybrid vehicles have been spreading, and the thickness of power wires for wiring vehicles has been increased, and the requirements for the length and the dimensional accuracy have been more and more stringent.

The present invention aims to solve at least one of the following problems associated with thick wires.

A) The length and size precision of the electric wire is improved.

B) The detection of the abnormal length of the electric wire can be automatically performed.

C) In the case where an excessive wire pulling-out force is applied, abnormality of the apparatus is prevented, and abnormality of the product is detected.

The wire drawing length measuring device according to the present invention is a wire drawing length measuring device for drawing a wire (W2) and measuring a drawing length of the wire (W2), and is characterized by comprising: a pull head (1705) for pulling out the wire and having a clamp (1701) for holding a front portion (WT) of the wire (W2); a head moving member (1770) that moves the pull-out head in the pull-out direction; a first length measuring means (1780, 1783, 1790) for measuring the length of movement of the pull head (1705); second length measuring means (2120, 2125) for measuring a length of the wire (W2) pulled out; and a length difference calculation unit (1798) that calculates a difference between the length measurement values of the two length measurement units.

In the wire drawing length measuring device of the present invention, the first length measuring member includes a movement motor (1790) of the head moving member (1770) and an encoder (1795) for detecting the rotation amount of the movement motor (1790), and the second length measuring member includes a length measuring roller (2120) pressed against the wire (W2) and rotated, and a revolution counter (2125) for detecting the rotation amount of the length measuring roller (2120).

In the case where the wire W2 has the bending as assumed above, the length measurement value of the second length measurement member is sometimes much longer or much shorter than the length measurement value of the first length measurement member. At this time, as an abnormality, the operator confirms and performs processing such as adjustment of the equipment. It is also preferred that the display, notification, alarm and/or device stop is performed in case the difference of the length measurements of the two length measuring means exceeds a reference.

An electric wire end processing apparatus of the present invention includes: a wire feeding unit (11) that feeds a wire (W1); an electric wire cutting unit (15) that cuts the supplied electric wire (W2); the wire pull-out length measuring device; a clamping and conveying part (21) which clamps the electric wire (W2) and transversely conveys the electric wire (W2) along a direction crossing the feeding direction of the electric wire; and end processing units (23, 25, 27) for processing the end of the cut electric wire, wherein the second length measuring member is disposed in the grip conveying unit (21).

Another wire-end processing apparatus of the present invention includes: a wire feeding section (11) for feeding a wire (W1) and having a straightener (1110) for straightening the curl of the wire; an electric wire cutting unit (15) that cuts the supplied electric wire; a wire-drawing length measuring unit (17) provided with a drawing head (1705), wherein the drawing head (1705) is provided with a clamp (1701) for holding the front part (WT) of the wire (W2) with the front end cut off, and the wire-drawing length measuring unit (17) is used for drawing the wire (W2) to a desired length; and end processing units (23, 25, 27) for processing the end of the cut electric wire, wherein the electric wire pulling-out length measuring unit (17) is provided with a head moving member (1770) for moving the pulling-out head (1705) in the pulling-out direction and length measuring members (1780, 1783, 1790) for measuring the moving length of the pulling-out head (1705), and the electric wire end processing device applies tension to the electric wire between the straightener (1110) and the pulling-out head (1705) when pulling out the electric wire.

In the wire end processing device, tension is applied to the wire between the straightener (1110) and the drawing head (1705) to restrain the wire from loosening such as deflection. Thus, there is basically no difference between the moving length of the pull-out head (1705) and the length of the wire actually pulled out, and the wire of an accurate length can be pulled out.

Another wire-drawn length measuring device of the present invention is characterized in that the wire-drawn length measuring device includes: a pull head (1705) for pulling out the wire (W2) and having a jig (1701) for holding a front portion (WT) of the wire (W2); a head moving member (1770) for moving the pull-out head in the pull-out direction; length measuring means (1780, 1783, 1790) for measuring the length of movement of the pull head; and a retraction member (1716), wherein when the pulling force applied to the pull-out head (1705) is equal to or greater than a predetermined value, the retraction member (1716) retracts the pull-out head in a direction opposite to the pulling-out direction.

The retreat member may have a cylinder 1716 and an adjustment valve 1719 for adjusting the pressure applied thereto. When the pulling force is larger than the force of the air cylinder, the air cylinder moves in the direction opposite to the pulling direction so as to retract the pulling head. Further, a means (1723) for detecting the operation of the retraction means (1716) can be included.

When the wire is pulled out, the wire is pulled out against the resistance of the leveler or the like. When the wire drawing resistance is too high, the drawing head is allowed to retract in a direction opposite to the drawing direction due to the wire bending strength. The operator then confirms the wire, the device. Alternatively, as an overload of the wire pull-out, display and warning are performed while the apparatus is stopped. Then, a process such as checking the wire correction unit, the wire reel feeding device, and the like is performed.

Another wire-end processing apparatus of the present invention is characterized by comprising: a wire feeding unit (11) that feeds a wire (W1); an electric wire cutting unit (15) that cuts the supplied electric wire; a wire-pulling-out length measuring unit (17) provided with a pulling-out head (1705), wherein the pulling-out head (1705) is provided with a clamp (1701) for holding the front part (WT) of the wire (W2) with the front end cut off, and the pulling-out head (1705) pulls out the wire (W2) to a desired length; a clamping and conveying part (21) which clamps the cut electric wire (W2) and transversely conveys the electric wire (W2) along a direction crossing the feeding direction of the electric wire; and an end processing unit (23, 25, 27) for processing the end of the cut electric wire, wherein the clamp conveying unit (21) has two pairs of jaws (2101, 2103) arranged in the front-rear direction for gripping the front end of the electric wire (W2), and the clamp (1701) of the pull-out head (1705) grips the front part (WT) of the electric wire (W2) between the two pairs of jaws (2101, 2103) of the clamp conveying unit (21).

When cutting the space between the rear end of the preceding wire and the front end of the following wire, two pairs of clamping pieces arranged in the front-rear direction, which clamp the front end of the wire (W2) of the conveying part (21), clamp the wire. Then, the clamp of the pull-out head holds the top (WT) of the wire (W3) between the two pairs of clamping pieces of the clamping and conveying part (21), and the clamping pieces of the clamping and conveying part (21) release the wire. After that, the pull head pulls out the electric wire. The clamp of the pull head grips and pulls out the electric wire in a stable state in a posture such as unbent and the like gripped by the two pairs of clamping pieces of the clamping and conveying part (21). Accordingly, since the gripping position of the clamp of the pull head is a desired position, the length accuracy of the electric wire can be maintained high.

In fig. 13 to 16, the reference numerals of the electric wires are as follows. The "electric wire W1" is a portion from the front end of the reel WL to the front grip conveying portion 21. The "electric wire W2" is a portion of which the front end is cut, and is a portion of which the rear end is cut next to become the next electric wire W3. The "wire W3" is a wire in a state where both ends are cut. The term "electric wire W" refers to a meaning collectively called an electric wire including the above-described electric wire portions.

The overall structure of the wire feeding/discharging length measuring device 1000 will be described with reference to fig. 13. The electric wire W is provided in a reel form (wire reel WL) wound on the reel holder 10 on the base side of the device. The spool holder 10 holds the core of the spool WL rotatably. The wire feeding portion 11 is provided at the tip of the reel WL. The wire feeding section 11 includes a straightener 1110. The leveler 1110 is a known one having a plurality of rolls 1111, 1113, 1115, 1117 sandwiching the wire W1 from the longitudinal direction and the transverse direction, for leveling the bending of the wire.

A front grip conveying section 21 is provided on the front side of the leveler 1110. For the overall operation and structure of the front clamp conveying section 21, refer to fig. 1, 6, 10 and the description thereof. The front clamp conveying portion 21 of this embodiment has two clips 2103, 2101 arranged at a constant interval in the front-rear direction. The clip holds the electric wire W2.

The wire cutting section 15 is disposed on the front side of the front clamp conveying section 21. The wire cutting portion 15 has a blade 1501 for cutting the wire. The wire cutting portion 15 is lowered except when cutting the wire, and the blade 1501 is prevented from coming into contact with the wire W2.

A wire pull-out length measuring device 17 is provided above the front grip conveying section 21 and the wire cutting section 15. The wire pull-out length measuring device 17 includes: a pull head 1705 for pulling out the electric wire and having a clamp 1701 for holding a front portion WT of the electric wire W2; and a head moving member 1770 that moves the pullout head in the pullout direction (see fig. 14 (C)). The pull head 1705 receives the front end portion of the wire W2 from the jaws 2103, 2101 of the front grip delivery section 21, and pulls out the wire of a desired length to the front side. Details thereof will be described later with reference to fig. 14.

A rear pinching conveying section 31 is provided on the front side of the cutting section 15. The clip 3101 of the rear clamp delivery section 31 grips the front end side portions of the wires W2, W3. When the cutting section 15 cuts the electric wire W2, both the front grip delivery section 21 and the rear grip delivery section 31 hold the electric wire W2. For the combined action of the rear clamping and conveying section 31, refer to fig. 1 and the description thereof.

Next, the wire drawing length measuring device 1000 including the first length measuring members 1780, 1783, 1790 and the second length measuring members 2120, 2125 for measuring the length of the wire W will be described with reference to fig. 14. As shown in fig. 14 (a) and 14 (C), the wire drawing length measuring device 1000 is substantially composed of the front grip conveying section 21 and the wire drawing length measuring device 17. As shown in fig. 13, the wire-drawn length measuring device 17 of fig. 14 (C) is disposed above and in front of the front grip conveying section 21 of fig. 14 (a).

The front grip conveying section 21 has, in order from the base side (upstream side) toward the front side (downstream side) of the electric wire, an electric wire guiding longitudinal roller 2145, an electric wire guiding lateral roller 2141, an electric wire passing passage 2130, an auxiliary length measuring roller 2120, a pair of clips 2103, 2101, and the like. The wire guide rollers 2145 and 2141 and the wire passage 2130 serve to prevent the wire W2 from being deviated during the transverse feeding in the crimping step or the like and to guide the wire W1 coming out of the straightener 1110 (fig. 13) straight in the front-rear direction and the up-down direction to the front grip feeding portion 21.

As shown in fig. 14 (B), the auxiliary length measuring roller 2120 is formed of a pair (two sets) of opposing rollers 2120, 2120'. Each roller is rotatable about an up-and-down axis. A cylinder 2123 that drives the rollers 2120, 2120' in a direction to narrow the distance between the rollers and a direction to expand the distance between the rollers is provided above the rollers. By this cylinder 2123, the rollers 2120, 2120 'are pressed against the side surface of the wire W2, and the rollers 2120, 2120' rotate at the same speed by friction as the wire W2 moves.

One side roller 2120 extends axially upward and is connected to encoder 2125. These length measuring rollers 2120, 2120', encoder 2125, and the like constitute a second length measuring means for measuring the length of the wire W2 pulled out. Further, the encoder 2125 is in a semi-restrained state in rotation by the wire holding force of the clips 2101, 2103 and the pressing force of the cylinder 2123. For length measurement, since the incremental function of the encoder is used for length measurement, there is no problem even in a semi-constrained state.

The wire drawing length measuring section 17 has a head moving rail 1771, a moving belt 1780, a moving motor 1790, a drawing head 1705 that grips and draws the wire W2, and the like. The pull head 1705 has a clamp 1701 for holding the front portion WT of the wire W2 at its lower portion. The gripper 1701 is driven by an opening/closing mechanism (such as a cylinder) provided in the gripper 1701, and is opened and closed. The pull head 1705 is supported slidably in the front-rear direction on a movement rail 1771 via a release slide table 1710 (described later with reference to fig. 16) and a movement table 1731.

The mobile station 1731 is driven by the timing belt 1780 to travel in the front-rear direction. A drive pulley 1783 and a driven pulley 1784 are engaged with the front and rear sides of the timing belt 1780. The driving pulley 1783 is driven to rotate by the head travel motor 1790. The head travel motor 1790 is a servo motor with an encoder built in. The encoder-equipped head travel motor 1790 constitutes a first length measuring means for measuring the moving length of the pull head 1705.

Next, the structure of the measurement system of the wire-drawn length measurement device of fig. 14 will be described with reference to the block diagram of fig. 15. The upper left of the drawing shows a moving motor 1790 of the pull head and an encoder 1795 incorporating the motor. The length measuring roller 2120 that rotates while pressing the pulled-out wire, and the encoder 2125 that detects the rotation of the length measuring roller 2120 are shown at the bottom left of the figure. The rotation signals of the motor encoder 1795 and the roller encoder 2125 are sent to a wire length difference calculating section 1798 (constituted by a microcomputer or the like). The wire length difference calculation section 1798 converts the signals from the two encoders into two wire pull-out lengths, and calculates the difference between the two.

In the case where the wire W2 has the above-described bending, the rotational length of the long length measuring roller 2120 (the length measurement value of the second length measuring member) is longer than the traveling length of the pull-out head 1705 (the length measurement value of the first length measuring member). Alternatively, sometimes the length measurement of the second length measurement member is much shorter than the length measurement of the first length measurement member. At this time, as an abnormality, the operator confirms and performs processing such as adjustment of the equipment.

In addition, in the case where the difference in the length measurement values of the two length measurement members exceeds the reference, display, notification, alarm, and/or device stop can also be performed via the operation panel 1799.

Next, two pairs of clips 2101 and 2103 of the front clamp conveying unit 21 shown in fig. 14 and 13 will be described. The clips are disposed at a slight interval in the front-rear direction of the electric wire. When the wire W2 is transferred from the front grip transfer section 21 to the pull head 1705, as shown in fig. 14, the clamp 1701 of the pull head grips the top WT of the wire W2 between the two pairs of jaws.

The front clip 2101 is configured to be lowered downward to avoid interference with the advancing pullout jig 1701 when pulling out the electric wire.

When cutting the boundary between the rear end portion of the preceding electric wire (the portion where the front and rear ends are cut off) and the front end portion of the following electric wire (the portion where the front and rear ends are cut off next), the two pairs of clips 2101, 2103 that hold the electric wire in the feeding portion 21 hold the electric wire. After cutting the electric wire, the clamp 1701 of the pull-out head 1705 holds the electric wire W2 between the two pairs of jaws of the clamp-conveying portion 21, and the jaws of the clamp-conveying portion 21 release the electric wire. After that, the pull head 1705 pulls out the electric wire.

As described above, when the wire W2 is received by the pull head 1705, the wire W2 is held by the two pairs of clips 2101 and 2103 of the clamp-and-feed unit 21, and the posture is stable without bending or the like. Therefore, the holding position of the pull-out jig becomes a predetermined position as expected, and thus, also contributes to keeping the length accuracy of the electric wire high in this regard.

Next, a pullout head retraction member in an electric wire pullout length measurement apparatus according to an embodiment of the present invention will be described with reference to fig. 16. The pullout head 1705 having the jig 1701 is mounted on the overload release slide 1710. The overload release slide 1710 is mounted on the moving stage 1731 so as to be movable in the front-rear direction along the overload release rail 1711.

The overload release slide 1710 is biased forward by the air cylinder 1716 relative to the moving stage 1731. That is, a cylinder 1716 is secured to the mobile station 1731, the rod 1717 of which is coupled to the overload release slide 1710. An air pipe 1720 is connected to a rod-side portion of the cylinder 1716. A pressure regulating valve 1719 is attached to the air pipe 1720, and air whose pressure has been regulated by the pressure regulating valve 1719 acts on the rod-side chamber 1716b of the cylinder 1716 and the rear surface 1718c of the piston 1718 in the cylinder.

In the normal state described below, as shown in fig. 16, the rod 1717 and the piston 1718 are positioned near the front side. A magnetic sensor 1723 is disposed on the front side of the outer surface of the cylinder 1718. The position of the piston 1718 is grasped by the sensor 1723. In the following abnormality, the piston 1718 relatively moves to the rear, and the sensor 1723 detects this movement.

The biasing force of the cylinder 1716 is higher than the maximum pulling force of the normal wire due to the resistance of the leveler 1110 (fig. 13) to the normal wire or the like. That is, in general, the overload release slide 1710, the pullout head 1705, and the clamp 1701 operate in synchronization with the operation of the mobile station 1731, and the wire can be pulled out.

On the other hand, when the bending of the wire is too strong and the resistance becomes too large, or when the pulling force applied to the pullout head 1705 becomes equal to or greater than the predetermined value due to an abnormal situation such as a wire conveyance failure such as a failure of the spool holder (wire feeding device) 10, the rod 1717 is pulled out from the cylinder 1716, and the overload release slide 1710 and the pullout head 1705 are retracted (retracted) in a direction opposite to the pullout side (rear) direction. At this time, the magnetic sensor 1723 detects this, and notifies the operator of the detection by an alarm or the like to prompt confirmation. Then, the operator confirms the wire and the device, and performs a process of eliminating the cause of overload applied to the wire, and the like. This can prevent failures due to device failure, wire abnormality, and the like.

A wire rotating portion between two terminal crimping machines of the terminal crimping wire manufacturing apparatus of the present embodiment will be described.

In the case of a thick wire, since the degree of freedom of twisting (torsion) of the wire itself is low and the weight per unit length of the wire is heavy, there is a case where the degree of freedom of adjusting (changing the angle) the angle between the terminals at both ends (the angle around the long axis of the wire) by applying torsion to the wire after crimping the terminals to both ends of the wire is low. In recent years, electric vehicles, hybrid vehicles, and the like have been widely used, and the thickness of power wires for automobile harnesses has been increased, so that the accuracy of the terminal angles at both ends has been more and more critical.

As a document that discloses a rotating member that rotates an electric wire of a terminal crimping electric wire about an axis, japanese patent application laid-open No. 2009-152104 (patent document 11, electric home-wear). Fig. 3, 4 and paragraphs 0053 to 0057 of this document disclose the wire end rotating portion 33. However, the wire end rotating portion 33 of the document 11 is used for adjusting the angle when the wire with the terminals crimped at both ends is placed on the wire holder 10 as a wire storage tool, and is not used for twisting the whole wire at the intermediate stage of crimping the terminals at both ends of the wire. That is, there is no technology that addresses the problem of adjusting (changing the angle) the angle between the terminals at both ends (the angle around the long axis of the wire) by twisting the wire.

As a document similarly disclosing a rotating member for rotating an electric wire of a terminal crimping electric wire around an axis, japanese patent application laid-open No. 2008-10375 (patent documents 12, JAPAN AUTOMATIC MACHINE co., LTD) exists. Fig. 1, 2, 3 and paragraphs 0036 to 0042 of the document disclose a wire harness manufacturing apparatus including a wire rotating mechanism 80A for rotating an end of a wire after terminal crimping and a wire rotating mechanism 80B for rotating an end of a wire not crimped. However, in the wire rotating mechanism of the document 12, only the rear end portion of the wire having the terminal T crimped at the front end thereof, that is, the wire is not twisted as a whole in a state where the front end portion having the terminal crimped is rotatable but not constrained. Therefore, the wire rotating mechanism is required at both ends of the wire, respectively.

Further, as a document disclosing a rotating member for rotating an electric wire of a terminal crimping electric wire around an axis, japanese patent No. 5048885 (patent documents 13, JAPAN AUTOMATIC MACHINE co., LTD) is known. Fig. 4 of the document discloses a member 10 for adjusting the angle of the terminal in the wire axis direction. However, the angle adjusting member 10 of the document 13 is used for adjusting the angle when inserting the electric wire with the terminals crimped at both ends into the connector housing, but is not used for twisting the electric wire as a whole at an intermediate stage of crimping the terminals at both ends of the electric wire. That is, there is no technology that addresses the problem of adjusting (changing the angle) the angle between the terminals at both ends (the angle around the long axis of the wire) by twisting the wire.

Patent document 11: japanese patent laid-open No. 2009-152104

Patent document 12: japanese patent laid-open No. 2008-10375

Patent document 13: japanese patent No. 5048885

The present invention aims to solve at least one of the following problems associated with thick wires.

A) The working procedure after terminal crimping is not blocked, and the working efficiency can be improved.

B) The angle adjustment can be accurately performed in a short time even for a heavy thick wire.

The wire both-end terminal crimping device of the present invention is characterized by comprising: a wire feeding unit (11) that feeds a wire (W1); an electric wire cutting unit (15) that cuts the supplied electric wire to an arbitrary length; a tip coating layer peeling part (23) for peeling the coating layer of the tip parts of the electric wires (W2, W3); a tip terminal pressure-bonding section (27) that pressure-bonds a terminal to the tip section from which the coating layer is peeled off; a rear end coating layer peeling part (33) for peeling off the coating layers at the end parts of the electric wires (W2, W3); a rear-end terminal crimping part (37) which crimps a terminal to the wire end part of which the coating layer is peeled off; and a clamp conveying part (21, 31) which clamps the electric wire and conveys the electric wire to each part, wherein the electric wire two-end terminal crimping device further comprises an electric wire rotating part (32) arranged between the front end terminal crimping part (27) and the rear end terminal crimping part (37), and the electric wire rotating part (32) only holds and rotates the rear end part of the electric wire with the terminal T in a crimping way, so that the electric wire (W3) is integrally rotated by a desired angle around the axial line of the length direction of the electric wire in a rotatable and non-restrained state of the front end part with the terminal.

In the present invention, the wire axis direction rotation step may be a process step of setting the wire axis direction rotation step to the rear side (tail side) of the wire, and after performing the desired wire axis direction rotation with respect to the front side (top side) of the wire, performing terminal crimping on the rear side (tail side). When the crimp electric wire is assembled in the next step of terminal crimping (inserting into a housing or the like), the thick electric wire is not easily twisted, and the posture of the crimped terminal is not free, so that when the crimp is performed by rotating the wire in the axial direction corresponding to the assembly in the next step, the working efficiency in the next step can be improved.

The wire both-end terminal crimping device according to the embodiment of the present invention will be described below with reference to the drawings. Fig. 17 is a schematic configuration and a perspective view showing the operation of the wire rotating portion 32 of the wire both-end terminal crimping device according to the embodiment of the present invention. Fig. 17 (a) shows a state in which the base WB of the wire W3 is inserted into the clamp 3201 of the wire rotating unit 32, fig. 17 (B) shows a state in which the rotating clamp 3201 is closed to hold the wire base WB, fig. 17 (C) shows a state in which the wire W3 is rotated 90 ° in the counterclockwise direction, and fig. 17 (D) shows a state in which the rotating clamp 3201 is opened to store the wire W3 in the rear clamp conveying unit 31.

Fig. 18 is a diagram showing a specific structure of the wire rotating part 32 of fig. 17, where fig. 18 (a) is a side view and fig. 18 (B) is a front view.

The wire rotating portion 32 includes a clamp 3201 that holds the base WB of the wire W3, an opening and closing mechanism 3203 of the clamp 3201, and a rotation motor 3227. In fig. 17 (a), a portion of the wire W3 near the base WB is gripped by a clamp 3101 of the rear end gripping and conveying portion 31. A terminal T1 is crimped to the front portion WT of the wire W3, and the front end portion of the terminal T1 is inclined to the right in the drawing. Then, the base WB of the wire W3 is inserted into the clamp 3201 of the wire rotating section 32 in the open state.

Fig. 17 (B) is a state in which the turning jig 3201 is closed to hold the wire base WB. Then, the conveying jig 3101 is slightly opened. Here, the front portion WT of the wire W3 is laid across the table 3102 of the rear clamp conveying portion 31 without being clamped, held, restrained, rotated. Here, as shown in fig. 17 (C), the rotation jig 3201 is rotated 90 ° counterclockwise to rotate the electric wire W3. At this time, the front end portion of the front terminal T1 of the wire W3 is raised upward. As described above, in the wire rotating portion 32 of the present embodiment, only the rear end portion of the wire is gripped, and the distal end portion to which the terminal is crimped is twisted in a rotatable but non-constrained state.

Next, as shown in fig. 17 (D), the conveying jig 3101 is closed, and the turning jig 3201 is opened. Thereafter, the rear end gripping and conveying section 31 conveys the electric wire W3 to the rear coating layer peeling section 33 (see fig. 1).

The specific structure of the wire rotating portion 32 of the present embodiment will be described with reference to fig. 18. The turning jig 3201 has jaws 3201b, 3201c opened up and down in fig. 18. As shown in fig. 18 (B), each clip has a mountain 3201g in a shallow V shape. As shown in fig. 18 (a), the mountain 3201g is thin plate-like in side view and is provided with a plurality of rows. Trough portions 3201j are formed between adjacent mountain portions 3201g.

When the turning jig 3201 is closed, the head portion (tip portion of a triangle on the left and right in front view) of the mountain portion 3201g enters the valley portion 3201j. In this example, the mountain 3201g has 3 pieces in the upper clip 3201b and 4 pieces in the lower clip 3201c. With such a structure in which a plurality of valleys are provided, the electric wire W3 can be firmly held.

A jig opening and closing mechanism 3203 formed by an air cylinder or the like is provided on the base side of the jig 3201. A rotor 3207 is connected to the base side of the clamp opening and closing mechanism 3203. The rotator 3207 is rotatably held with respect to the frame 3211. A large pulley 3221 is mounted on a base-side end portion of the rotor 3207. A timing belt 3223 is wound around the outer periphery of the large pulley 3221.

The timing belt 3223 is wound around the outer periphery of the lower small pulley 3225. The small pulley 3225 is mounted to an axial end of a rotary motor 3227 with a speed reducer. The turning motor 3227 is a servo motor, and can be stationary at a precise rotational position and angle. This makes it possible to accurately determine the angle by rotating the thick wire while holding only the rear end portion.

A terminal crimping machine of the terminal-crimping wire manufacturing apparatus of the present embodiment will be described. Thick wire for wire harness of automobile (for example, stranded wire having a sectional area of 8sqmm ² ～20sqmm ² ) The terminal crimping machine of (2) requires a large crimping force of about 70KN or more. In recent years, electric vehicles, hybrid vehicles, and the like have been widely used, and the thickness of power wires for automobile harnesses has been increased. In addition, the precision requirements for the crimp shape of the terminal are also becoming more stringent. Therefore, in the case of the current general cantilever crimping machine frame, there is a risk of insufficient rigidity.

Japanese patent application laid-open publication No. 2513288 (patent document 51) discloses a servo press for supporting the upper die 1 with left and right struts (lifting frame 9). The servo press of patent document 51 is provided with a ball screw shaft 6 and a screw joint 8 at an axial portion of a servo motor 4, and rotates the motor 4 and the screw joint 8 to move the ball screw shaft 6, a lifting frame 9, and the upper die 1 up and down. Such a hollow direct drive servomotor is a special product, and therefore, the price becomes extremely high.

In the servo press of patent document 51, the motor 4 is disposed between left and right struts (lifting frames 9), and the screw joint 8 for moving the ball screw shaft 6 up and down is directly driven by the motor 4. Therefore, a motor of high output torque corresponding to the required thrust force is required. For example, when a motor having a shaft torque of about 300 N.m is used, the outer diameter thereof is from phi 350mm to phi 450mm, and the inter-strut dimension becomes large.

The disadvantage in the case of the inter-pillar size becoming large is as follows.

(A) The accuracy of parallelism and the like between the ram holder (see reference numeral 2731 of fig. 19 and 20, also referred to as "bed") and the applicator stage (see reference numeral 2741 of fig. 19 and 20, also referred to as "bed") is lowered according to the size of the ram holder.

(B) Depending on the position where the concentrated load is applied, deflection corresponding to the size and rigidity of the slider is generated, and the processing is performed depending on the rigidity of the mold (applicator) used, which may reduce the life of the mold.

Further, in the servo press of patent document 51, since the motor is disposed at a lower portion between the left and right struts, there is also a problem that maintenance performance is poor when the motor is failed.

The present invention aims to solve at least one of the following problems associated with a servo press and a terminal crimping machine of thick electric wires.

A) A standard and small motor can be used.

B) The combination of the motor and the reduction mechanism is more optional.

C) The distance between the struts is not enlarged to be more than required, and the accuracy of parallelism between the sliding piece and the bed surface and the like and deflection when concentrated load is loaded correspond to the size and rigidity of the sliding piece.

D) The applicator is easy to replace and install.

The servo press of the present invention is a press (2700) including an upper die (2711), a lower die (2721), and an upper die driving member, the upper die (2711) being a movable tool, the lower die (2721) being a fixed tool opposed to the upper die, the upper die driving member driving the upper die (2711), the servo press being characterized in that the upper die driving member includes: a feed nut (2771) that linearly drives the upper die; a feed screw (2781) in threaded engagement with the feed nut; a motor (2794) which is a rotation driving source of the feed screw, the motor (2794) rotating around an axis offset with respect to a rotation axis of the feed screw; and a rotation transmission mechanism (2757, 2754, 2751) that transmits rotation of the motor to the feed screw (2781).

The terminal crimping machine (2700) of the present invention includes: a crimp device (2711) which is a movable tool for crimping the terminal (T) to the end of the electric wire (W); an anvil (2721) that is a fixed tool opposite the crimper; and a crimper driving part that drives the crimper (2711), the terminal crimping machine (2700) being characterized in that the crimper driving part includes: a feed nut (2771) that linearly drives the crimper; a feed screw (2781) in threaded engagement with the feed nut; a motor (2794) which is a rotation driving source of the feed screw, the motor (2794) rotating around an axis offset with respect to a rotation axis of the feed screw; and a rotation transmission mechanism (2757, 2754, 2751) that transmits rotation of the motor to the feed screw (2781).

The servo press or the terminal crimping machine of the present invention has the specific modes: a ram (2701) driving the crimper or upper die (2711); a ram holder (2731) that holds the ram; a nut holder (2767) that holds the feed nut (2771); two tie rods (2734L, 2734R) that connect the left and right side portions (2731 h, 2731 m) of the press head holder (2731) and the left and right side portions (2767 h, 2767 m) of the nut holder (2767), respectively; an applicator stand or die stand (2741) on which the anvil or lower die (2721) is mounted, the tie rods (guide rods, 2734) penetrating through left and right side portions (2741 h, 2741 m) of the applicator stand or die stand (2741); and rod guide portions (2745L, 2745R) fixed to the left and right side portions (2741 h, 2741 m) of the stand.

A motor (2794) is placed beside the screw (2781), and rotation is transmitted to the screw by a rotation transmission mechanism such as a belt (2754). Therefore, the motor 2794 is not required to be placed between the two struts (tie rods 2734), and the strut interval can be reduced. Thus, the size and deflection of the ram holder (2731, slider), the applicator stage or the die stage (2741, bed surface) are reduced, and the shape accuracy of the crimp terminal is improved.

In addition, a motor having a general shape and standard (torque, rotation speed, and belt speed reducer) can be widely selected. Further, the screw (2781) can be rotated without moving up and down, so that the height of the device can be suppressed.

A terminal crimping machine according to an embodiment of the present invention will be described below with reference to the drawings. Fig. 19 is a side view of a press 2700 according to an embodiment of the present invention, and fig. 20 is a front view thereof. The crimping machine 2700 is a device for crimping the terminal T to the tip end portion of the electric wire W, the coating layer of which is partially stripped. The crimping machine 2700 has a crimper 2711 as a movable tool for crimping the terminal T and an anvil 2721 as a fixed tool opposed to the crimper.

The anvil 2721 is placed on the anvil holder 2724. The retainer 2724 is placed on the applicator mount 2737 by way of the applicator base 2727. Further, the anvil 2721, the crimper 2711, and the feeding mechanism 2715 of the terminal T are assembled as the applicator AP according to the kind and size of the terminal. When the type and size of the terminal are changed, the terminal is replaced together with the applicator AP.

Handle 2707 to which crimp 2711 is secured. The shank 2707 engages with the ram bolt 2703 to hang. The ram bolt 2703 protrudes from the lower surface of the ram 2701 above it. The shank 2707 is part of the applicator AP, and the ram bolt 2703 and ram 2701 are part of the body of the crimping machine (press).

The ram 2701 is formed in a block shape, and is provided at a lower surface center portion of the ram holder (upper link lever) 2731 so as to protrude downward. The ram holder 2731 is a thick band-shaped member extending from left to right. Two tie rods 2734L, 2734R (struts, guide rods) hanging downward are fixed to the left and right side portions 2731h, 2731m of the ram holder 2731.

The tie rods 2734L, 2734R extend downward on both outer sides of the applicator AP, penetrate the guide portion 2745, extend further downward, reach both left and right side portions 2767h, 2767m of the nut holder (lower connecting rod) 2767, and fix the lower ends thereof. In the press-bonding machine 2700, the upper and lower ram holders (upper connecting rods) 2731, the nut holders (lower connecting rods) 2767, and the left and right guide rods (tie rods) 2734L, 2734R form rectangular frames. The frame is driven up and down to raise and lower the ram 2701 and the crimper 2711.

The upper portion of the rod guide 2745 is fixed to the applicator stage 2741, and the lower portion of the rod guide 2745 is fixed to the bearing holder 2761. Applicator stage 2741 is a stage on which applicator AP is mounted. The bearing holder 2761 supports a bearing housing 2764, the bearing housing 2764 includes a bearing (not shown) for rotatably supporting a feed screw 2781, which will be described later, and the bearing holder 2761 is a thick belt-shaped member. The left and right lever guide portions 2745L, 2745R, the applicator stage 2741, and the bearing holder 2761 are themselves firm structures, and are firmly fixed to a support stage, not shown.

A bush 2735 that guides the guide rod 2734 to be slidable up and down is disposed in the guide portion 2745.

The nut holder 2767 supports a nut case 2771 including a feed nut (ball nut) screwed to a feed screw 2781 described later, and is a relatively thick belt-shaped member.

The feed screw 2781 is a ball screw shaft extending up and down. A driven pulley 2751 is fixed to the upper end of the feed screw 2781. The bearing housing 2764 is disposed below the driven pulley 2751, and a bearing in the bearing housing 2764 rotatably supports the feed screw 2781. The nut case 2771 is disposed below the bearing case 2764, and a ball nut in the nut case 2771 is screwed to the feed screw 2781.

When the feed screw 2781 is driven to rotate by the driven pulley 2751, the feed nut and nut case 2771 and the nut holder 2767 move up and down. The feed screw 2781 rotates only and does not move up and down.

The belt 2754 engages with the outer periphery of the driven pulley 2751. The belt 2754 extends rearward in fig. 19 and engages with the outer periphery of the drive pulley 2757. The drive pulley 2757 is fixed to the shaft of the motor reducer 2791. An integrated servomotor 2794 is provided below the motor reducer 2791. The motor reducer is firmly fixed to a support stand, not shown.

In the press-bonding machine 2700 of this embodiment, as shown in fig. 20, a bearing housing 2764 and a bearing holder 2761 for rotatably holding the feed screw 2781 are provided on the opposite side to the applicator stage 2741 with left and right rod guide portions 2745L and 2745R interposed therebetween. Further, windows 2750 are opened between the left and right rod guide portions 2745L, 2745R, the upper and lower applicator stages 2741, and the bearing holders 2761. The driven pulley 2751 is disposed in the window 2750. With such a structure, the rod guide 2745 can be lengthened to suppress tilting of the rod 2734, and the overall height of the crimping machine can be reduced.

A terminal crimping machine 2800 of another embodiment will be described with reference to fig. 21 and 22. Fig. 21 is a side view of the terminal crimping machine 2800 after the applicator changing function is improved, and fig. 22 is a plan view. The front (front side), rear (base side) and left-right directions in fig. 22 correspond to the directions of the front terminal crimping portions 27 in fig. 1.

The terminal crimping machine 2800 is characterized in that the terminal crimping machine 2800 includes: an Applicator (AP) having a crimper (2711) for crimping the terminal (T) to the end of the electric wire (W), see FIGS. 19, 20), an anvil (2721), and a terminal feeding mechanism (2715); a crimper driving part that drives the crimper (2711); and an applicator stand (2741) on which the Applicator (AP) is mounted, wherein a slide rail (2739) for guiding the Applicator (AP) in a sliding manner between an operating position (2741 x) and a standby position (2823 y) of the applicator is provided on the upper surface of the applicator stand (2741).

The applicators to be used next are prepared in advance on the slide rails (2739, 2871) and the table (2823), and after the applicators to be used are pulled out on the slide rails and the table, the applicators to be used next can be set in the crimping machine. Therefore, the time for stopping the press machine is shortened, and the operation rate of the press machine is improved.

The operation position (2741 x) of the applicator is a position where the Applicator (AP) is located below the ram 2701 (see fig. 20) of the crimping machine body and the terminal T is crimped to the end of the electric wire W. The standby positions (2823 y, 2871 y) of the applicators are positions outside the body of the crimping machine that do not interfere with the crimping operation, and are standby positions of the applicators that are subsequently attached to (or removed from) the crimping machine.

In the terminal crimping machine (2800) of this embodiment, since slide rails (2739, 2871) for guiding the Applicator (AP) in a sliding manner are provided between the operation position (2741 x) and the standby positions (2823 y, 2871 y) of the applicator, the removal and installation of the applicator are easy. In addition, the replacement operation of the applicator can be performed in a short time.

In the press-bonding machine (2800) of the present invention, two types of side feed (side feed) and end feed (end feed) are preferably provided as the slide rails (2739, 2871). But can also correspond to any form of applicator. The "side feed" refers to a mode in which a strip-shaped terminal row in which a plurality of terminals are arranged is fed from the lateral direction (the direction intersecting the wire insertion direction) of the crimping machine main body, and the "end feed" refers to a mode in which a terminal row is fed from the longitudinal direction (the direction along the wire insertion direction). In the case where the crimping machine main body is of two columns as shown in fig. 20, the slide rails (2739, 2871) may also be provided to extend in a direction diagonally intersecting with respect to a line connecting centers of the two columns.

In fig. 21, the side-feed applicator APS in the operating position 2741x is shown on the left side of the figure, and the side-feed applicator APS' in the standby position 2823y is shown on the right side of the figure. The applicator APS in the operative position 2741x is mounted via its applicator base 2727 to a slide rail 2739 on the applicator stand 2741. On the other hand, the applicator APS' in the standby position 2823y is mounted on a slide rail (side stand) 2823 on a stand 2831 via an applicator base 2727 thereof.

Rail grooves 2739b, 2823b are engraved in the upper surfaces of the rail 2739 on the operating position 2741x side and the rail (side stand) 2823 on the standby position 2823y side so as to extend in the left-right direction. The applicator APS can slide along the rail grooves 2739b, 2823b (by being pressed by hand to slide).

As shown in fig. 21, the left and right end portions of the applicator base 2727 at the operating position 2741x are pressed and fixed by the base fixing claws 2742, 2743. The surfaces 2742b, 2743b of the fixing claws 2742, 2743 on the applicator base 2727 side are inclined surfaces which are inclined inward as they go upward. Thus, the two fixed claws 2742, 2743 form a dovetail groove therebetween. The end surfaces of the applicator base 2727 on the left and right sides are inclined surfaces to fit into the dovetail grooves.

The left hand stationary jaw 2742 is fixedly secured to the applicator stage 2741, the slide rail 2739. When the base 2727 of the replaced applicator is brought to the operating position 2741x, the base 2727 comes to rest against the left fixed jaw 2742. The right fixed claw 2743 is detachable. Alternatively, the fixing claws 2742 and 2743 can be fixed, fixed released, and retracted freely by a known lever mechanism and actuator. When the applicator APS is moved to and from the operating position 2741x, the right fixing claw 2743 is released from the fixation and retracted.

As shown in fig. 22, the slide rail 2823 of the standby position 2823y is set to a wider stage 2823. The table 2823 is slidable in the front-rear direction on a rail 2821 provided in the rack 2831 in the front-rear direction. A plurality of applicators APS1 and APS2 can be provided on the table 2823.

The rail groove 2823b is formed on the upper surface of the side table 2823 so as to extend in the left-right direction. The rail groove 2823b of the table 2823 is identical in width and depth to the rail groove 2739b of the slide rail 2739 of the applicator table 2741, and the two grooves 2823b and 2739b are connected in a straight line at the same front-rear direction position. Also, in this state, the applicator APS can slide along the two slots 2823b, 2739 b.

In the state of fig. 22, the front-side applicator APS2 is in a position connected to the operating position 2741 x. The applicator APS2 is a device that has been pulled out from the operation position 2741x or a device that is to be set to the operation position 2741 x. The rear applicator APS1 is a device that slides the table 2823 rearward to retract after being pulled out from the operation position 2741x, or a device that is placed at the operation position 2741x after the table 2823 is slid forward.

Next, replacement of the end-feed applicator APE will be described. In the upper right of fig. 22, the end-feeding applicator APE in the standby position 2871y is shown. The applicator APE in the standby position 2871y is mounted to a slide rail 2871 extending in the front-rear direction. The rail groove 2871b is engraved into the upper surface of the slide rail 2771 in such a manner as to extend in the front-rear direction. The applicator APE can slide along the rail groove 2871b (by being pressed by a hand).

The rear end 2871t of the end-feed slide rail 2871 extends to a position close to the side 2739t of the operating position 2741x at the right end of the side-feed slide rail 2739. In the operating position 2741x, an end-feed rail groove 2739c extending in the front-rear direction is formed perpendicularly to the side-feed rail groove 2739 b. The rail groove 2739c for feeding the ends of the two rails and the rail groove 2871b are formed to penetrate along a straight line. In addition, the two slide rails 2871, 2739 and the two rail slots 2871b, 2739c are identical in height.

With such a structure of the slide rails 2871, 2739, the end-feeding applicator APE can slide between an operating position 2741x at the center portion of the press body and a standby position 2871y spaced from the center portion. Thus, the applicator APE which is sent out from the operation position 2741x and slid to the standby position 2871y can be detached at the standby position 2871y by a crane or the like. When the side feed applicator APS is used next, the end feed applicator APE is slid from the operation position 2741x, and then the side feed applicator APS is quickly set to the operation position 2741x, so that the terminal crimping operation can be restarted.

Claims (10)

1. An electric wire end processing apparatus, comprising:

a wire feeding unit (11) that feeds a wire (W1);

an electric wire cutting unit (15) that cuts the supplied electric wire (W2);

a wire-drawn length measuring device (17) that draws out the wire (W2) and measures the drawn-out length of the wire (W2);

a clamping and conveying part (21) which clamps the electric wire (W2) and transversely conveys the electric wire (W2) along a direction crossing the feeding direction of the electric wire; and

an end processing unit (23, 25, 27) for processing the end of the cut electric wire,

it is characterized in that the method comprises the steps of,

the wire pull-out length measuring device (17) includes:

a pull head (1705) which pulls out the electric wire and has a clamp (1701) for holding a front portion (WT) of the electric wire (W2);

a head moving member (1770) that moves the pull-out head in the pull-out direction;

a first length measuring means (1780, 1783, 1790) for measuring the length of movement of the pull head (1705);

second length measuring means (2120, 2125) for measuring the pulled-out length of the wire (W2); and

a length difference calculation section (1798) that calculates a difference in length measurement values of the two length measurement sections,

The second length measuring member has a length measuring roller (2120) pressed against the wire (W2) and rotated, and a revolution counter (2125) detecting the rotation amount of the length measuring roller (2120),

the second length measuring member is disposed on the grip conveying section (21),

a clip (2101) for gripping the tip end of the wire (W2) is arranged on the grip conveying section (21),

when the pull head (1705) receives the electric wire (W2) from the grip conveying section (21), a clamp (1701) of the pull head (1705) holds a front portion (WT) of the electric wire (W2) between the length measuring roller (2120) and the clip (2101).

2. The wire-end processing apparatus according to claim 1, wherein,

in the event that the difference in the length measurement values of the two length measurement components exceeds a reference, a display, notification, alarm and/or device stop is performed.

3. The wire-end processing apparatus according to claim 1 or 2, wherein,

the wire cutting section (15) is retracted to avoid contact with the wire (W2) except when cutting the wire.

4. A wire end processing device is characterized in that,

a wire feeding unit (11) having a straightener (1110) for straightening the curl of the wire, the wire feeding unit (11) being configured to feed the wire (W1);

An electric wire cutting unit (15) that cuts the supplied electric wire;

the wire pull-out length measuring device according to any one of claims 1 to 3; and

an end processing unit (23, 25, 27) for processing the end of the cut electric wire,

the wire end processing device applies tension to the wire between the straightener (1110) and the drawing head (1705) when the wire is drawn.

5. A wire-drawn length measuring device (17) which draws out a wire (W3) and measures the drawn-out length of the wire (W3), characterized in that,

the wire pull-out length measuring device includes:

a pull head (1705) which pulls out the wire (W2) and has a clamp (1701) for holding a front portion (WT) of the wire (W2);

a head moving member (1770) that moves the pull-out head in the pull-out direction;

length measuring means (1780, 1783, 1790) for measuring the length of movement of the pull head; and

and a retraction member (1716), wherein when the pulling force applied to the pull-out head (1705) is equal to or greater than a predetermined value, the retraction member (1716) retracts the pull-out head in a direction opposite to the pulling-out direction.

6. The wire-drawn length measuring device according to claim 5, wherein,

the retreat member has a cylinder and an adjustment valve (1719) for adjusting the pressure applied thereto.

7. The wire-drawn length measuring device according to claim 5 or 6, wherein,

the wire drawing length measuring device further includes a member (1723) for detecting the operation of the retreat member (1716).

8. A wire both-end terminal crimping device, the wire both-end terminal crimping device comprising:

a wire feeding unit (11) that corrects the wire;

an electric wire cutting unit (15) that cuts the supplied electric wire to an arbitrary length;

a distal end coating layer peeling part (23) for peeling the coating layer of the distal end part of the electric wire;

a tip terminal pressure-bonding section (27) that pressure-bonds a terminal (T1) to the tip section from which the coating layer has been peeled off;

a rear end coating layer peeling part (33) for peeling off the coating layer of the rear end part of the electric wire;

a rear terminal crimping part (37) which crimps the terminal (T2) to the rear end part of the wire after the coating layer is stripped; and

clamping and conveying parts (21, 31) which clamp and convey the electric wires to each part,

the wire both-end terminal crimping device is characterized in that,

The wire both-end terminal crimping device further comprises a wire rotating part (32) arranged between the front-end terminal crimping part (27) and the rear-end terminal crimping part (37), wherein the wire rotating part (32) only holds the rear end part of the wire (W3) and rotates the whole wire (W3) by a desired angle around the wire length direction axis under the state that the front end part of the wire (W3) with the terminal (T1) crimped at the front end is rotatable and not restrained.

9. A terminal-crimping electric wire manufacturing apparatus, comprising:

a wire feeding unit (11) that feeds a wire (W1);

an electric wire cutting unit (15) that cuts the supplied electric wire to an arbitrary length;

wire coating layer peeling sections (23, 33) for peeling off the coating layers at the ends of the wires (W2, W3);

terminal crimping parts (27, 37) for crimping the terminal to the end part of the electric wire with the coating layer stripped; and

clamping and conveying parts (21, 31) which clamp and convey the electric wires to each part,

the terminal crimping wire manufacturing device is characterized in that,

the terminal crimping wire manufacturing apparatus further includes the wire pull-out length measuring apparatus according to any one of claims 1 to 4, the wire pull-out length measuring apparatus according to any one of claims 5 to 7, or the wire both-end terminal crimping apparatus according to claim 8.

10. A method for manufacturing a terminal crimping electric wire includes the following steps: a step of feeding the electric wire; cutting the fed wire into an arbitrary length; a coating layer peeling step of peeling off the coating layer at the end of the electric wire; and a terminal crimping step of crimping a terminal to an end of the electric wire from which the coating layer is peeled, the terminal crimping electric wire manufacturing method being characterized in that,

the method for manufacturing a terminal crimping electric wire further includes an electric wire pulling-out length measuring step, an electric wire end processing step, or an electric wire rotating step using the terminal crimping electric wire manufacturing apparatus according to claim 9.

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