CN110661156B - Terminal crimping device, terminal crimped wire manufacturing device and manufacturing method - Google Patents

Abstract

The utility model provides a wire coating stripping device which can reliably drop firmly adhered coating broken chips. The wire coating stripping device (23, 33) comprises: 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 in the coating layer at the end of the electric wire (W) from two directions; and a clamp (211) for holding the base side part of the end part of the electric wire. The electric wire coating stripping device (23, 33) further comprises 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 layer part (WK) (FIG. 4 (D)) attached to the front side of the stripping blade (231, 233) and a position apart from the position.

Description

Terminal crimping device, terminal crimped wire manufacturing device and manufacturing method

Technical Field

The present invention relates to a device for peeling (stripping) a coating (skin) at an end of an electric wire, and a device for crimping a terminal after peeling the coating. In particular, it relates to a suitable diameter ratio that is relatively large (e.g., strand cross-sectional area 8sq (mm)²)～20sq(mm²) Coating layer stripping device, terminal crimping device, etc. for the electric wire.

Background

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

(1) About chip breaking of coating layer

In order to peel the coating of the thick electric wire to cut a cut in the coating, a coating peeling blade (cutter blade, japanese: り Write む blade) having a semicircular arc shape corresponding to the core wire combination diameter (strand diameter) of the electric wire is generally used. In addition, when peeling off the coating layer of the electric wire other than the thick electric wire, a diamond-shaped knife is generally used. This is because, in the case of a thick electric wire, when a diamond-shaped knife is used, the remaining portion of the covering layer where no notch is formed becomes large, and resistance when the electric wire is pulled back and the portion where no notch is cut is torn (see fig. 3C, paragraph 0034, and the like) increases, which is not preferable. Further, the shape of the torn portion is irregular, which causes a 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 and the tension generated by the winding of the reel. In this case, although the coating layer is cut with the above-described semicircular arc knife, chips of the coating layer after peeling may get caught on the blade portion. When the subsequent operation is continued in this state, quality deterioration 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 chips, there is Japanese patent laid-open No. 2009-55766 (patent document 1, manufactured by Kyowa Co., Ltd.). In the technique of patent document 1, the coating layer removing piece is moved in the center direction of the wire side in conjunction with the closing operation of the stripping blade by the swing operation method, and after the coating layer is stripped, the coating layer removing piece is held and the opening operation is performed with a delay from the opening operation of the stripping blade, thereby removing the coating layer chip from the stripping blade.

(2) Wire elongation at crimping

When the terminal is crimped to the thick wire, the core wire of the wire has a large diameter, and therefore, the core wire is considerably elongated when the terminal is crimped. If no measures are taken to absorb the elongation of the electric wire, the electric wire may be bent or the core wire may be buckled.

As a method for absorbing the elongation of the electric wire for the purpose of preventing the electric wire from being bent, japanese patent application laid-open No. 2015-211039 (patent document 2, KOMAX) is proposed. In the technique of patent document 2, the wire feeding holder is operated in the axial direction of the wire in accordance with the elongation of the wire core wire generated at the time of crimping, thereby preventing the 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.

Documents of the prior art

Patent document

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

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

Disclosure of Invention

Problems to be solved by the utility model

The utility model aims to provide a wire coating stripping device which can reliably drop firmly adhered coating chips. Alternatively, an object of the present invention is to provide a terminal crimping device including a wire elongation absorbing mechanism having a relatively simple structure, which can absorb core wire elongation occurring at the time of terminal crimping to prevent bending or buckling of an electric wire.

Means for solving the problems

In the "means for solving the problems" and the "claims" and a part of the specification, the parenthesized part indicates the reference numeral of the part of the drawing, but this is for reference only and does not limit the scope of the claims to the content of the drawing.

The utility model provides a device for stripping a coating of an electric wire, 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 in the coating layer at the end of the electric wire (W) from two directions; a stripping knife driving component (248) which opens and closes the plurality of stripping knives (231, 233); a clamp (211) for holding a base side portion of an end portion of the electric wire; and a clamp conveying section (21, 31) that drives the clamp to insert the end of the electric wire between the plurality of opened strippers (231, 233), and after a cut is cut by the strippers, pulls the base side portion to leave a coating portion (WK) in front of the cut on the front side of the strippers and peels off the coating portion (WK), wherein the electric wire coating-layer stripping apparatus (23, 33) further comprises a coating-chip-breaking-off member (241) that reciprocates between a position in contact with the coating portion (coating chip) (WK) in front of the strippers (231, 233) and a position away from the position.

The above-mentioned "a plurality of peeling blades in a pair for cutting a slit in two directions" does not exclude the peeling blades in three or more directions and three or more directions. The above "reciprocating" includes two or more reciprocating motions. The chip-breaking knock-out member includes a member (for example, reference numerals 241, 241A, and 241B in fig. 5) for knocking out the coating chip adhered to the blade portion, and a member (for example, reference numeral 241C in fig. 5) for catching and conveying the coating chip.

The actuator of the coating breaker knock-out means includes a structure using an electromagnetic solenoid or the like in addition to the cylinder. In addition, the shape of the removal plate can be deformed to incline the striking direction, so that the coating breaker can be easily peeled off and removed. Specifically, reference is made to fig. 5 and described later. Further, by simultaneously performing discharge air blowing, vacuum evacuation, and the like, the removal performance is improved, and the versatility of the device is increased so as to be applied to a thin electric wire (attached to a stripping blade by static electricity) and the like. It can be said that an air outlet (including a static elimination blow) and a vacuum extractor can be easily combined to the coating layer discharge guide path (discharge chute, piping) and the movable plate, and the vacuum extractor can be also additionally combined.

The stripping blade drive means (248) preferably uses a servo mechanism capable of adjusting the amount of cutting into the coating layer, such as the lowering position of the upper stripping blade, for each wire size. Further, the wire insertion mechanism for the gripping and conveying sections 21 and 31 preferably uses a servo mechanism. The specific contents will be described later in the description of the embodiments of the utility model.

The present invention provides a terminal crimping device (300), the terminal crimping device (300) comprising: terminal crimping machines (27, 37) for crimping the terminal (T) to the end of the wire (W) from which the coating layer has been peeled; and an electric wire clamping and conveying part (21, 31) which grips the electric wire and inserts an end of the electric wire into the terminal crimping machine, the terminal crimping device (300) is characterized in that the electric wire clamping and conveying part (21, 31) comprises: a clamp (211) for holding a base side portion of an end portion of the electric wire; a jig driving member (348) that drives the jig to insert the end of the electric wire into the crimpers (27, 37); and an elongation absorbing mechanism (320) for retracting the clamp (211) in accordance with the elongation of the wire when the terminal is crimped, the elongation absorbing mechanism (320) comprising: a telescopic biasing member (323) that biases the jig (211) in the direction of the crimping machine, and deforms by receiving a force equal to or greater than a predetermined value in the direction opposite to the insertion direction; and a biasing force adjusting member (327) that adjusts the force at the start of expansion and contraction of the expansion and contraction biasing member (323).

An insertion position limiting member (329) may be further provided, and the insertion position limiting member (329) may limit the insertion position of the clip (211) urged by the telescopic urging member (323). In the terminal pressing device of the present invention, the expansion/contraction urging member (323) may be a spring. The biasing force adjusting member (327) and the insertion position restricting member (329) may be a screw member such as a bolt.

By providing a structure using a mechanism such as a spring for expanding and contracting the biasing member 323, it is possible to absorb the expansion of the electric wire of different sizes in the terminal crimping of the electric wires of various sizes. In addition, no complicated sensors and complicated control are required.

The present invention provides another terminal crimping device (400), the terminal crimping device (400) including: a terminal crimping machine (27 ', 37') for crimping the terminal (T) to the end of the wire (W) from which the coating layer has been removed; and a wire clamping and conveying part (21 ', 31') which grips the wire and inserts an end of the wire into the terminal crimping machine, the terminal crimping device (400) being characterized in that the wire clamping and conveying part (21 ', 31') comprises: a clamp (411) for holding a base side portion of an end portion of the electric wire; a jig driving member (448) that drives the jig to insert the end of the electric wire into the crimper (27 ', 37'); and an elongation absorbing mechanism (420) for retracting the holder (411) in accordance with the elongation of the wire when the terminal is crimped, the elongation absorbing mechanism (420) comprising: an elongation start crimp height detection means that detects whether or not a crimp height at which a core wire of the electric wire starts to elongate due to terminal crimping has been reached; and a cylinder (423) that operates in synchronization with the stretch-start pressure-bonding height detection means and allows the clamp (411) to retreat.

The aforementioned pressure contact height detection means is, for example, a lowering position detector of a vertical drive mechanism of the pressure contact device (275, see fig. 9). Examples of the cylinder (423) include an air cylinder and a torque-controllable electric cylinder with a servo function. If a structure synchronized with the lowering stroke of the pressure bonding press or the like can be obtained, it is possible to cope with the inconstant elongation by using an air cylinder using an atmosphere opening direction control valve or the like, or an electric cylinder capable of torque control.

In particular, the cylinder (423) is preferably a pneumatic cylinder, and a valve (5-port middle-position exhaust type (atmosphere open type) directional control valve 463 or the like) for exhausting or reducing the pressure in the pneumatic cylinder in synchronization with the expansion/compression start height detecting means is attached to the cylinder (423). If a mechanism in which a 5-port directional control valve for mid-position exhaust is combined with a cylinder is used by synchronizing the mechanism in which the cylinder and the pressure control valve are combined with the pressure contact height, a higher-level elongation absorbing mechanism is obtained. The following operation flow is also possible: when reaching a pressure contact height at which the core wire starts to elongate due to pressure contact, the pressure contact is temporarily stopped, and at the same time, a signal is output to the direction control valve, and then the pressure contact is continued.

Further, the forward and backward movement of the wire clamping and conveying sections (21, 31) can be changed from the ball screw (347, 348) drive to the electric cylinder drive with the servo function, and the wire elongation can be absorbed by closing the servo excitation or reducing the torque in synchronization with the crimp height at which the elongation of the core wire starts to occur due to the crimping. In this case, the structure is simpler than the rack and pinion structure of patent document 2.

The utility model provides a manufacturing device (1) of a terminal crimping electric wire, comprising: a wire feeding unit (11) that feeds a wire (W1); a wire cutting unit (15) that cuts the supplied wire to an arbitrary length; wire coating stripping sections (23, 33) for stripping coatings from the ends of the wires (W2, W3); a terminal crimping part (27, 37) which crimps the terminal to the end of the wire from which the covering is peeled; and a grip conveying section (21, 31) that grips the electric wire and conveys the electric wire to each section, characterized in that the electric wire coating layer peeling section (23, 33) is the electric wire coating layer peeling device (23, 33), or the terminal crimping section (27, 37) and the grip conveying section (21, 31) constitute the terminal crimping device (300, 400).

The utility model provides a manufacturing method of an end-processed wire, which comprises the following steps: a step of feeding the wire; cutting the fed electric wire into an arbitrary length; a coating layer peeling step of peeling a coating layer at an end of the electric wire; and a terminal crimping step of crimping a terminal to the end portion of the electric wire from which the coating layer has been peeled off, the method for manufacturing the end-processed electric wire being characterized in that 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 apparent from the above description, in the electric wire coating layer stripping apparatus according to the present invention, the coating layer chips are reliably removed from the stripping blade, and the quality of the coating layer stripping pattern of the electric wire can be maintained and improved. Further, the chip breaker chute (251) has a channel structure and a structure surrounded by the clad chip breaker knock-out member (241), thereby constituting a chip breaker discharge guide path, and further having an effect of preventing the clad chip breaker from scattering.

In the terminal crimping device of the present invention, the wire elongation at the time of terminal crimping is absorbed by using the telescopic biasing member (323), the cylinder (423) and the like, and thus it is possible to absorb the wire elongation of different sizes of wires at the time of terminal crimping without performing complicated synchronization control and sensing. Thus, the quality of the terminal crimping wire product without bending or buckling of the wire can be improved.

Drawings

Fig. 1 is a plan view schematically showing the entire configuration of a terminal-crimped wire manufacturing apparatus according to an embodiment of the present invention.

Fig. 2 is a perspective view showing a schematic configuration of a wire coating stripping device (scrap knock-out mechanism) according to an embodiment of the present invention.

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

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

Fig. 5 is a perspective view schematically showing a modification of the chip knock-out mechanism of the wire coating stripping device.

Fig. 6 is a side view schematically showing the overall configuration of the terminal crimping machine and the wire gripping and conveying section according to the embodiment of the present invention.

Fig. 7 is a diagram showing a configuration of a main part of the electric wire stretch absorbing mechanism in the electric wire pinching and conveying section of fig. 6, where 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 part of the electric wire elongation absorbing mechanism of fig. 7.

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

Fig. 10 is a side view showing an outline of the overall configuration 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 device 400 of fig. 10.

Fig. 12 is a side view of the elongated absorbent mechanism 420 of fig. 11.

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

Fig. 14 is a diagram showing a configuration of a wire pullout length measuring apparatus including first length measuring members 1780, 1783, 1790 and second length measuring members 2120, 2125 for measuring the length of a wire W according to an embodiment of the present invention. 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 electric wire pullout length measuring apparatus 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 electric wire pullout length measuring apparatus 17 according to the embodiment of the present invention.

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

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

Fig. 19 is a side view of a crimper 2700 according to the embodiment of the present invention.

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

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

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

Description of the reference numerals

W, electric wires; WK, coating portion; w1, wire conveyed; w2, cutting the wire at the front end; w3, cutting the electric wire back and forth; t, T1, T2, terminal; 11. an electric wire feeding section; 15. an electric wire cutting part; 17. a wire drawing length measuring section; 20. a travel track; 21. a front clamping and conveying part; 23. a wire coating layer stripping device (a wire coating layer stripping part and a front coating layer stripping part); 25. a front inspection unit; 27. a terminal crimping machine (terminal crimping part, front terminal crimping part); 30. a travel track; 31. a rear clamping conveying part; 32. an electric wire rotating part; 33. a wire coating layer stripping device (a wire coating layer stripping part and a rear coating layer stripping part); 35. a post-inspection unit; 37. a terminal crimping machine (terminal crimping part, rear terminal crimping part); 41. a product receiving section; 211. a clamp; 213. a clamp base; 215. a jig opening and closing mechanism (cylinder); 217. a clamp opening and closing mechanism base; 218. a rack; 219. an up-and-down moving cylinder with a guide; 231. a stripping knife (upper knife); 233. a stripper knife (lower knife); 237. 238, a sliding member; 241. a coating layer chip-breaking knock-out member (plate); 241A, 241B, 241C, coating layer chip breaking and knocking-off components; 241x, a jaw member; 243. drive means (actuator, cylinder); 244. an air nozzle; 247. upper and lower guide rails (columns); 248. a peeling blade driving member (motor); 249. a ball screw with a linear motion guide for opening and closing the stripper blade; 251. a chip breaking chute; 275. a crimping device; 283. an anvil; 300. a terminal crimping device; 320. an elongation absorbing mechanism; 321. a rack; 321r, a bedplate; 321t, spring receiving holes; 321w, a rear end face; 321x, internal threads; 323. a telescopic urging member (coil spring); 327. a biasing adjustment member (adjustment bolt); 327b, front end portion; 327f, central portion; 328. locking the nut; 329. a stop bolt; 329b, external threads; 329f, a cylindrical portion; 329h, end face; 329j, hexagonal hole-containing portion (head); 331. a bolt implant plate; 331g, through holes; 331k, the rear side; 333. a 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 part); 351. a transverse sliding table; 400. a terminal crimping device; 411. a clamp; 419. an up-and-down moving cylinder with a guide; 420. an elongation absorbing mechanism; 421. a rack; 423. a cylinder; 423b, a rod; 429. a stopper bolt (positioning bolt); 430. implanting plate bolts into the plate; 431g, a through hole; 432. a block body; 433. a wire elongation absorbing slider; 435. a guide; 445. front and rear guides; 448. a motor (jig driving part); 451. a transverse sliding table; 463. a directional control valve; WL, wire reel; 10. a reel bracket; 1000. a wire feeding/drawing length measuring device; 1110. a straightening machine; 1111. 1113, 1115, 1117, roller; 1501. a knife; 1701. a clamp; 1705. pulling out the head; 1710. an overload release slide table; 1711. an overload release track; 1716. a retreat member (cylinder); 1716b, rod-side chamber; 1717. a piston rod; 1718. a piston; 1718c, rear side; 1719. a pressure regulating valve; 1720. an air pipe; 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 (synchronous belt); 1783. a drive pulley; 1784. a driven pulley; 1790. a movement motor; 1795. an encoder; 1798. a length difference calculation section; 2101. 2103, a clip; 2120. an auxiliary length measuring roller; 2123. a cylinder; 2125. revolution counter (encoder); 2130. a wire passage; 2141. a wire guide transverse roller; 2145. a wire guide longitudinal roller; 3101. a clip; WB, base of wire W3; 31. a rear clamping conveying part; 3101. conveying the clamp; 3102. a stage; 32. an electric wire rotating part; 3201. rotating the clamp; 3201b, 3201c, clips; 3201g, mountain parts; 3201j, valley; 3203. a clamp opening and closing mechanism; 3207. a rotating body; 3211. a frame; 3220. a rotating member of the opening and closing mechanism; 3221. a large belt pulley; 3223. a synchronous belt; 3225. a small belt pulley; 3227. a rotary motor; AP, an applicator; APE, end-feed applicator; APS, applicator for side feed; 2700. a terminal crimping machine; 2701. a pressure head; 2703. a ram bolt; 2707. a handle; 2711. a crimper (upper die); 2715. a terminal feeding mechanism; 2721. an anvil (lower die); 2724. an anvil retainer; 2727. an applicator base; 2731. a ram holder (upper link); 2731h, 2731m, left and right sides; 2734. tie rods (guide rods, struts); 2735. a bushing; 2739. a slide rail; 2739b, track groove; 2739c, applicator mounting table; 2739t, side; 2741. an applicator stage (lower die stage); 2741h, 2741m, and left and right side parts; 2741x, running position; 2742. 2743, base fixing claw; 2742b, 2743b, flour; 2745. a rod guide; 2750. a window; 2751. a driven pulley; 2754. a belt; 2757. a drive pulley; 2761. a bearing retainer; 2764. bearings (bearing housings); 2767. a nut holder (lower tie rod); 2767h, 2767m, left and right sides; 2771. a feed nut (nut box); 2781. a feed screw; 2791. a motor reducer; 2794. a motor; 2800. a terminal crimping machine; 2821. a track; 2823. a slide rail (side stand); 2823b, track grooves; 2823y, standby position; 2831. a rack; 2871. a slide rail; 2871b, track grooves; 2871t, rear end; 2871y, standby position.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the front-back direction is the axial direction of the electric wire W, the left-right direction (lateral direction) is the direction in which the electric wire W is held by the electric wire gripping and conveying section in the lateral direction, and the up-down direction is the direction in which the pressure welding tool and the coating stripping upper blade are moved up and down (not limited to the earth gravity direction).

First, the overall configuration of a thick crimped terminal wire manufacturing apparatus according to an embodiment of the present invention will be described with reference to fig. 1.

The terminal-crimped wire manufacturing apparatus 1 includes the following components.

The wire feeding unit 11 feeds the wire W1 in the longitudinal direction from a wire bundle (not shown) wound in a roll.

And a cutting unit 15 for cutting the fed electric wire W1 and determining the length of the front and rear cut electric wires W3.

And a wire drawing length measuring section 17 for drawing the wire having passed through the cutting section 15 forward. The position corresponding to the length of the terminal crimped wire to be a product is stopped, and the rear end of the wire is cut. The electric wire whose both ends are cut is referred to as a front-rear cut electric wire W3.

And a front clamp conveying section 21 that clamps an end of the electric wire (tip-cut electric wire) W2 and conveys the same in the lateral direction. The front clamp conveying part 21 conveys the electric wire W2 leftward from the electric wire conveying position L0 to the crimping position L-3, and then returns to L0.

The travel rail 20 is traveled by the front nip conveyor 21 on the travel rail 20.

And a front coating layer stripping part 23 for stripping the coating layer of the electric wire W2 with the cut front end part.

And a front inspection part 25 for inspecting the coating peeling state of the front end part of the electric wire.

And a front terminal crimping part 27 which crimps the terminal T1 to the front end of the electric wire W2.

And a rear clamp conveying section 31 for clamping the front and rear cut wires W3 and conveying the same in the lateral direction. The rear grip conveying section 31 receives the wire W3 at a position where the wire is drawn into the 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.

The travel rail 30 travels on the travel rail 30 by the rear nip conveyor 31.

And a wire rotating part 32 which rotates the rear end of the wire around the shaft center and aligns the crimping position (posture) of the rear end terminal around the shaft with a predetermined position.

And a rear coating layer stripping part 33 for stripping the coating layer of the electric wire W3 with the rear end part being cut.

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

And a rear terminal crimping part 37 crimping the terminal T2 to the rear end of the electric wire W3.

And a product receiving portion 41 for receiving the sent product wire with terminals pressed at both ends.

The coating layer peeling apparatuses 23 and 33 will be described with reference to fig. 2 to 4. The direction shown in fig. 2 is a direction toward the front clad peeling (peeling) portion 23. As shown in the figures, the coating peeling devices 23 and 33 have an upper blade 231 and a lower blade 233 for cutting a notch in the coating 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 vertical direction along the vertical guide rails (columns) 247 by a ball screw 249 with linear motion guides for opening and closing the stripper blades and a motor (a stripper blade driving member) 248 thereof. Here, the ball screw 249 has threads (left-handed thread and right-handed thread) of opposite spiral directions formed in the upper half portion and the lower half portion thereof, and the sliders 237 and 238 are driven in a direction of moving away from each other (knife open) or in a direction of moving closer to each other (knife closed) by the rotation of the ball screw 249.

A chip-breaking knock-out member (plate) 241 for knocking out the coated chip breaker and an up-and-down driving actuator (cylinder) 243 are mounted on a side surface (right side surface in fig. 2) of the upper slider 237. Their actions are described below. A chip breaking chute 251 for guiding the fallen chips 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 chip breaker is also provided.

The operation of the clad- layer peeling devices 23 and 33 will be described with reference to fig. 3 and 4. Fig. 3 and 4 are schematic diagrams, and the shapes and dimensions do not correspond to those in fig. 2.

Fig. 3 (a) shows the stripping blades 231 and 233 in the initial position after the blades are opened, and the end of the wire W is inserted between the blades. The breaker knock-out plate 241 is in a state of being lifted up.

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

Fig. 3C shows a state in which the stripping blades 231 and 233 are slightly opened from the state of fig. 3B, and the wire W is pulled in a direction away from the stripping blades 231 and 233 (pulled-back state). Pulling the wire W means that the gripping and conveying sections 21 and 31 (see fig. 1 and 6 (described later)) move in the axial direction of the wire W while gripping the wire W. Thus, the portion (coating chip WK) of the wire coating layer located forward (on the left side in the drawing) of the blades 231 and 233 is separated from the tip 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 pulled wire W.

In fig. 4 (D), after the coating chip WK is separated from the electric wire W, the stripping blades 231 and 233 are slightly opened from the state (C) of fig. 3, and the upper and lower blades 231 and 233 are half-opened. In this state, the coating layer chip WK is sandwiched between the upper and lower blades 231 and 233. Here, the chip-breaking striking plate 241 is moved up and down several times to strike off the coating-layer chips WK. The coating breaker WK falls into the chute 251. While the breaker knock-out plate 241 is operating, an air flow is blown from the air nozzle 244 to the coating breaker WK. The coating breaker WK is dropped in a state where the upper and lower knives 231 and 233 are half-opened in order to set the cylinder stroke position of the driving member (actuator, cylinder) 243 that drives the breaker knock-out plate 241 to 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 electric wire W after the coating layer is peeled off is conveyed to the subsequent step.

Fig. 5 is a perspective view schematically showing a modification of the chip knockout mechanism of the wire coating stripping device. The breaker striking-off member 241A shown in fig. 5 (a) is a member in which a rod-like or projection-like member is attached to the reduced breaker striking-off plate 241. The chip-breaking knock-out member 241A is driven vertically in the same manner as the chip-breaking knock-out plate 241, and breaks the coating chips. The advantage of this rod-shaped or protrusion-shaped striking member 241A is that the chip-breaking striking member 241A is attached to a position slightly offset from the center position of the coating layer, so that the coating layer is struck off from an oblique upper side, and the coating layer chips caught on the upper blade 231 or the lower blade 233 are easily dropped.

The chip-breaker knock-out member 241B in fig. 5 (B) is a tapered member, and the portion on the front side in contact with the coating chip breaker is thick. The chip-breaking knock-out member 241B is driven vertically in the same manner as the chip-breaking knock-out plate 241, and breaks the coating chips. The advantage of this tapered chip-breaker knock-out member 241B is that the coating-breaker chips come into contact with the adhering coating-breaker chips from the lateral portion, dropping the coating-breaker chips along an oblique angle, and knocking out the coating-breaker chips similarly easily.

The chip breaking and striking member 241C 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 same. The clad chip breaker is gripped by a chuck and peeled off from the peeling blade, and the clad chip breaker is conveyed to a chute or a suction portion, where the chuck 241x is opened to convey the clad chip breaker.

The stripping blade driving means (248) preferably controls the open/close position of the upper and lower stripping blades, particularly the cutting depth of the stripping blade with respect to the coating layer and the position control of the half-open state of fig. 3 (C), by a servo mechanism that can be adjusted for each wire size. Further, the wire insertion mechanism of the nip transporting unit 21, 31 (specifically, the front-rear slide motor 348 (fig. 6)) preferably uses a servo mechanism. This enables fine control of the peeling length adjustment, the coating layer peeling operation, and the pressure bonding position adjustment.

A terminal crimping machine and a wire-gripping lateral transfer device according to an embodiment of the present invention will be described with reference to fig. 6 to 9. Fig. 6 is a side view showing an outline of the overall configuration of the apparatus. Fig. 7 is a side sectional view showing the structure of the elongation absorbing mechanism of the electric wire gripping and conveying section 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 explaining a problem of the conventional technique.

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

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

The gripping and conveying sections 21 and 31 include a gripper 211 for gripping the electric wire W and a mechanism 215 for opening and closing the gripper. The jig base 213 on which the jig 211 is mounted on a jig opening/closing mechanism 215, 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 a vertical falling mechanism at the time of pressure contact. The jig opening and closing mechanism base 217 is fixed to the stage 218. The stand 218 is mounted on a stand 321 of the wire extension absorbing mechanism 320 via a vertical movement cylinder 219 with a guide.

The stand 321 of the wire stretch absorbing mechanism 320 is mounted on the wire stretch absorbing slider 333 and can slightly slide in the front-rear direction on the guide 335 and the front-rear sliding plate 341. The wire stretch absorbing mechanism 320 is one of the characteristic features of the present invention, and will be described in detail later with reference to fig. 7, 8, and 9.

The front-rear sliding 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 the ball screw 347 and the motor 348. The front and rear guides 345 are mounted on a lateral slide base 351 and are movable along rails 20 and 30 (see also fig. 1) extending in the lateral direction.

As shown in fig. 7, the wire elongation absorbing mechanism 320 includes a coil spring 323 and a main portion of an adjusting bolt 327 of the coil spring 323, in addition to the above-described stage 321 and slider 333.

The coil spring 323 is accommodated in a spring accommodating hole 321t cut into 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 face 321w of the platen 321 r.

The head (front end portion 327b) of the spring adjustment bolt 327 enters a portion near the rear end of the spring receiving 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 insertion plate 331. As shown in fig. 6, the bolt insertion plate 331 is fixed to the rear end portion of the front and rear sliding plates 341 in an upwardly standing manner. When the bolt 327 is advanced forward by screwing the bolt 327 into the female thread 331f, the coil spring 323 is compressed. The lock nut 328 is also screwed by the bolt 327, and the front-rear direction position of the bolt 327 can be fixed.

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

The intermediate cylindrical portion 329f of the stopper bolt 329 is inserted into the through hole 331g formed in the bolt insertion plate 331 in a non-contact state. 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 insertion plate 331. This is because the platen 321r is biased forward by the compression force applied to the coil spring 323, and this biasing force acts to pull the stopper bolt 329 fixed to the platen 321r forward. As a result, the advance limit of the platen 321r is determined by the stopper bolt 329. The advance limit of the platen 321r finally determines the insertion position at which the tip of the electric wire W is inserted into the terminal crimping portions 27, 37. When the clamp 211 is pressed against the extended wire to contract the coil spring 323 during the terminal crimping, the stopper bolt 329 is retracted by an amount corresponding to the contraction.

In the state of fig. 7, when the spring adjustment bolt 327 is screwed in (the spring adjustment bolt 327 is advanced), the coil spring (expansion/contraction urging member) 323 is compressed and the urging force (the set load at which expansion/contraction starts) is increased. On the other hand, when the spring adjustment bolt 327 is pulled out (the spring adjustment bolt 327 is retracted), the coil spring 323 expands, and the biasing force (the set load at which expansion and contraction start) becomes weak. As described below with reference to fig. 9, the clamp 211 for gripping the wire is pressed rearward by the wire expansion at the time of terminal crimping, and the pressing force is transmitted to the stand 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 retreat (the extension absorbing slider 333 slides rearward on the guide 335).

The operation of the wire stretch 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 explaining a problem of the conventional technique. In the conventional technique of fig. 9 (B), since the retreating mechanism of the jig 211 is not present, the wire W is bent in a V shape upward in the drawing under the influence of the wire elongation at the time of pressure bonding. On the other hand, in the embodiment of the present invention shown in fig. 9 (a), since the retreating mechanism of the clamp 211 is present, the clamp 211 is retreated 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 showing an outline of the overall configuration 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 device 400 of fig. 10. Fig. 12 is a side view of the elongated absorbent mechanism 420 of fig. 11.

The main apparatus 400 shown in fig. 10 is configured by the terminal crimping portions 27 ', 37' and the grip conveying portions 21 ', 31'. The terminal crimping portions 27 ', 37' of the main device 400 have the same configuration and function as those of the terminal crimping portions 27, 37 of fig. 6. In the grip conveying sections 21 'and 31' of the main apparatus 400, the portions indicated by reference numerals of fig. 6 added with 100 or 200 are portions having the same functions. The specific correspondence is as described in the description column of reference numerals.

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

In this embodiment, the cylinder 423 is a pneumatic cylinder 423. The cylinder 423 is connected to a pneumatic pressure regulator 461 and a 5-port middle-position exhaust type (atmosphere open type) directional control valve 463 through pneumatic piping (schematically shown by a one-dot chain line). The directional control valve 463 opens the atmosphere of two chambers, i.e., a chamber on the side of the pneumatic cylinder 423 closer to the rod 423b and a chamber on the opposite side of the rod, by a detection signal indicating the start of the extension/pressure contact height. Thereby, the cylinder 423 can move in the direction of the force applied to the rod 423 b.

That is, when a force accompanying the extension of the electric wire is applied in such a manner as to retract the holder 411, the rod 423b of the cylinder 423 contracts by an amount corresponding to Δ S shown in fig. 12. The block 432 and the jig 411 connected to the block 432 can be retracted by the amount corresponding to the contraction amount. In the present embodiment, the operation flow is as follows: when reaching the pressure contact height at which the elongation of the core wire due to the pressure contact starts, the pressure contact is temporarily stopped, and at the same time, a signal is output to the direction control valve 463, and the pressure contact is continued.

The stopper bolt (set 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 have the same structure and function as the through holes 331g of the bolt insertion plate 331 of fig. 7. Further, a hole 430f in the center of the plate 430 is a through hole through which the rod of the cylinder is freely movable. 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 driving of the ball screws 347 and 348 may be changed to the electric cylinder driving with a servo function using the pressure control for thrust adjustment, and the electric wire elongation may be absorbed by closing the servo excitation or reducing the torque in synchronization with the lower limit position of the pressure contact. In this case, the structure becomes simpler than the rack and pinion structure of patent document 2.

The wire pull-out length measurement of the terminal crimped wire manufacturing apparatus according to the present embodiment will be described. In the thick electric wire, it is difficult to sufficiently remove the curl (japanese: coil きクセ) of the electric wire and also difficult to perform length measurement of the cut length of the electric wire due to the following circumstances. That is, since the weight per unit length of the electric wire becomes heavy, in the conveying roller system as the conventional method, when the load becomes large, a slip occurs between the roller surface and the electric wire coating layer surface, and an error is likely to occur between the conveying amount on the roller side and the length of the electric wire actually conveyed. Further, since the friction coefficient and the weight change greatly due to characteristics such as the material of the coating layer of the electric wire and the conductor structure inside the electric wire, an error in the length of the electric wire is likely to occur as described above. Further, depending on the state of the wound-up wire, the outer diameter of the wire covering layer changes, and the gripping position of the roller changes, which tends to cause an error.

Therefore, in order to accurately draw out the electric wire by a desired length (to extend the electric wire along the long side), the following work is required. In addition, in recent years, electric vehicles and hybrid vehicles have become widespread, and power cables for automobile wiring have been made thicker, and the requirements for the length dimensional accuracy have become more stringent.

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

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

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

C) In the case where an excessive wire pullout force is applied, an apparatus abnormality is prevented, and a product abnormality is detected.

The wire pullout length measurement device of the present invention is a wire pullout length measurement device that pulls out a wire (W2) and measures the pullout length of the wire (W2), and is characterized by comprising: a pull-out head (1705) that pulls out the electric wire and has a gripper (1701) that grips the front portion (WT) of the electric wire (W2); a head moving member (1770) that moves the pull-out head in a pull-out direction; a first length measuring means (1780, 1783, 1790) that measures a moving length of the pullout head (1705); a second length measuring part (2120, 2125) that measures a length of the electric wire (W2) that is pulled out; and a length difference calculation means (1798) that calculates the difference between the length measurement values of the two length measurement means.

In the wire-drawn-out length measuring device of the present invention, the first length measuring member includes a travel motor (1790) of the head travel member (1770) and an encoder (1795) that detects the amount of rotation of the travel motor (1790), and the second length measuring member includes a length measuring roller (2120) that is pressed against the wire (W2) and rotates, and a revolution counter (2125) that detects the amount of rotation of the length measuring roller (2120).

When the wire W2 has a bend as assumed above, the length measurement value of the second length measurement member may be much longer or shorter than the length measurement value of the first length measurement member. At this time, the operator checks the abnormality and performs a process such as adjustment of the equipment. Further, it is also preferable that the display, the notification, the alarm and/or the device stop be performed when the difference between the length measurement values of the two length measurement means exceeds a reference.

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

Another wire end processing device of the present invention includes: a wire feeding unit (11) for feeding a wire (W1) and having a straightening machine (1110) for straightening a coil of the wire; a wire cutting unit (15) for cutting the supplied wire; a wire-drawn-length measuring unit (17) provided with a drawing head (1705), the drawing head (1705) having a jig (1701) for gripping a front portion (WT) of a wire (W2) whose front end has been cut, the wire-drawn-length measuring unit (17) being configured to draw out a desired length of the wire (W2); and an end processing unit (23, 25, 27) that processes an end of the cut wire, wherein the wire-drawing-length measuring unit (17) includes a head moving member (1770) that moves the drawing head (1705) in a drawing direction, and length measuring members (1780, 1783, 1790) that measure a moving length of the drawing head (1705), and the wire-end processing unit applies tension to the wire between the straightener (1110) and the drawing head (1705) when the wire is drawn.

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

Another wire pullout length measurement device of the present invention is characterized by including: a pull-out head (1705) for pulling out the electric wire (W2), and having a gripper (1701) for gripping a front portion (WT) of the electric wire (W2); a head moving member (1770) for moving the pull-out head in a pull-out direction; a length measuring means (1780, 1783, 1790) for measuring a moving length of the drawer head; and a retracting member (1716) that retracts the pullout head in a direction opposite to the pullout direction when the pullout force applied to the pullout head (1705) is equal to or greater than a predetermined value.

The retraction member may include a cylinder (1716) and a control valve (1719) for adjusting the pressure applied thereto. The cylinder applies a force to the pullout head in the pullout direction, and when the pullout force is greater than the force of the cylinder, the cylinder moves in a direction opposite to the pullout direction to make the pullout head retreat. Further, a means (1723) for detecting the operation of the retraction means (1716) may be provided.

When the wire is pulled out, the wire is pulled out against the resistance of a straightener or the like. When the wire pull-out resistance is too large, the pull-out head is retracted in a direction opposite to the pull-out direction due to, for example, excessive bending of the wire. Then, the operator confirms the electric wire and the device. Alternatively, the overload of the wire drawing is displayed and warned while the device is stopped. Then, a process such as an inspection of the wire correction unit, the wire reel feeding device, and the like is performed.

Another wire end processing device of the present invention is characterized by comprising: an electric wire feeding unit (11) for feeding an electric wire (W1); a wire cutting unit (15) for cutting the supplied 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 a front portion (WT) of a wire (W2) with a cut front end, and the drawing head (1705) draws out the wire (W2) by 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) that processes an end of the cut electric wire, wherein the grip conveying unit (21) has two pairs of clips (2101, 2103) arranged in the front-rear direction that grip a front end of the electric wire (W2), and the gripper (1701) of the pullout head (1705) grips a front portion (WT) of the electric wire (W2) between the two pairs of clips (2101, 2103) of the grip conveying unit (21).

When cutting off the space between the rear end part of the preceding electric wire and the front end part of the following electric wire, the electric wire is held by two pairs of clamping pieces which are arranged along the front and back direction and used for clamping the front end part of the electric wire (W2) of the clamping and conveying part (21). Thereafter, the gripper of the drawing head grips the top (WT) of the electric wire (W3) between the two pairs of jaws of the gripping and conveying section (21), and the jaws of the gripping and conveying section (21) release the electric wire. Thereafter, the pulling head pulls out the electric wire. The clamp of the drawing head grips and draws out the electric wire in a stable state of an unbent posture gripped by the two pairs of clamping pieces of the clamping and conveying part (21). Therefore, the gripping position of the gripper of the pullout head becomes a desired position, and therefore, the length accuracy of the electric wire can be maintained high.

In fig. 13 to 16, the reference numerals of the electric wires have the following meanings. The "wire W1" is a portion from the front end of the reel WL to the front nip conveyor 21. The "wire W2" is a portion whose leading end is cut off, and is a portion whose trailing end is subsequently cut off to become the next wire W3. The "wire W3" is a wire in a state in which both ends are cut. The term "wire W" refers to the electric wire including the above-described electric wire portions collectively.

The overall structure of the electric wire feeding/drawing length measuring device 1000 will be explained with reference to fig. 13. The wire W is wound around a reel (wire reel WL) and is set on the reel holder 10 on the base side of the apparatus. The spool holder 10 holds the core of the spool WL rotatably. A wire feeder 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 type, and includes a plurality of rollers 1111, 1113, 1115, 1117 for correcting a wire curl, which sandwich the wire W1 between the longitudinal direction and the lateral direction.

The front side of the leveler 1110 is provided with a front nip conveyor 21. The overall operation and structure of the front nip conveyor 21 will be described with reference to fig. 1, 6, and 10. In the front grip conveying section 21 of this embodiment, two clips 2103, 2101 are arranged at a predetermined interval in the front-rear direction. The clip grips the electric wire W2.

The wire cutting section 15 is disposed on the front side of the front grip conveying section 21. The wire cutting section 15 has a blade 1501 for cutting the wire. The wire cutting section 15 is lowered in a case other than the case of cutting the wire, so that the blade 1501 is prevented from making useless contact with the wire W2.

An electric wire drawing length measuring device 17 is provided above the front grip conveying section 21 and the electric wire cutting section 15. The electric wire pull-out length measuring device 17 includes: a drawing head 1705 for drawing out the electric wire, and having a gripper 1701 for gripping 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. 14C). The drawing head 1705 receives the front end portion of the electric wire W2 from the jaws 2103, 2101 of the front grip conveying unit 21, and draws the electric wire of a desired length to the front side. The details of which will be described later with reference to fig. 14.

A rear nip conveying section 31 is provided on the front side of the cutting section 15. The clip 3101 of the rear grip conveying section 31 grips the tip end side portions of the electric wires W2, W3. When the cutting section 15 cuts the electric wire W2, both the front clamp feeding section 21 and the rear clamp feeding section 31 hold the electric wire W2. The overall operation of the rear nip conveyor 31 will be described with reference to fig. 1.

Next, a wire pullout length measuring apparatus 1000 including first length measuring members 1780, 1783, and 1790 and second length measuring members 2120 and 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 pullout length measuring device 1000 is roughly composed of a front nip transporting section 21 and a wire pullout length measuring device 17. As shown in fig. 13, the wire pullout length measuring device 17 shown in fig. 14 (C) is disposed above and on the front side of the front nip conveyor 21 shown in fig. 14 (a).

The front nip 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 guide longitudinal roller 2145, an electric wire guide transverse roller 2141, an electric wire passage channel 2130, an auxiliary length measuring roller 2120, a pair of jaws 2103, 2101, and the like. The wire guide rollers 2145, 2141 and the wire passage 2130 serve to prevent the wire W2 from being misaligned during lateral conveyance in a crimping process 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 nip conveyor 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 can freely rotate around the upper and lower shafts. Above the rollers 2120 and 2120', a cylinder 2123 is provided which is driven in a direction to narrow the gap between the rollers and in a direction to widen the gap between the rollers. The rollers 2120 and 2120 'are pressed against the side surface of the wire W2 by the air cylinder 2123, and the rollers 2120 and 2120' rotate at the same speed by friction with the movement of the wire W2.

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

The wire pullout length measuring unit 17 includes a head travel rail 1771, a travel belt 1780, a travel motor 1790, a pullout head 1705 that grips and pulls out the wire W2, and the like. The pull-out head 1705 has a jig 1701 at its lower portion for gripping the front portion WT of the wire W2. The jig 1701 is driven by an opening and closing mechanism (such as an air cylinder, built in the pullout head 1705) provided thereon to open and close. The pullout head 1705 is supported on the movement rail 1771 via a release slide base 1710 (described later with reference to fig. 16) and a movement base 1731 so as to be slidable in the front-rear direction.

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

Next, the configuration of the measuring system of the electric wire pullout length measuring apparatus of fig. 14 will be described with reference to the block diagram of fig. 15. In the upper left of the figure, a movement motor 1790 of the pullout head and an encoder 1795 incorporating the motor are shown. A length measuring roller 2120 that is pressed against the drawn-out electric wire and rotates and an encoder 2125 that detects rotation of the length measuring roller 2120 are shown in the lower left of the figure. The rotation signals of the motor encoder 1795 and the roller encoder 2125 are sent to the electric wire length difference calculation means 1798 (constituted by a microcomputer or the like). The wire length difference calculating section 1798 converts the signals from the two encoders into two kinds of wire pullout lengths, and calculates the difference between the two.

When the wire W2 has a bend as assumed above, the rotational length of the length measuring roller 2120 (the length measurement value of the second length measuring member) may be longer than the travel length of the pullout head 1705 (the length measurement value of the first length measuring member). Alternatively, the length measurement value of the second length measurement member may be much shorter than the length measurement value of the first length measurement member. At this time, the operator checks the abnormality and performs a process such as adjustment of the equipment.

Further, when the difference between the length measurement values of the two length measurement members exceeds the reference value, it is also possible to display, notify, alarm, and/or stop the apparatus via the operation panel 1799.

Next, the two pairs of clips 2101 and 2103 of the front nip conveyor 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 conveyor 21 to the drawing head 1705, the gripper 1701 of the drawing head grips the top WT of the wire W2 between the two pairs of jaws, as shown in fig. 14.

The clip 2101 on the front side is configured to be able to descend downward to avoid interference with the advancing drawing jig 1701 when the electric wire is drawn out.

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 before) and the front end portion of the following electric wire (the portion where the front and rear ends are cut off next), the electric wires are held by the two pairs of jaws 2101 and 2103 of the grip conveying portion 21. After the electric wire is cut, the gripper 1701 of the pulling head 1705 grips the electric wire W2 between the two pairs of jaws of the gripping and conveying unit 21, and the jaws of the gripping and conveying unit 21 release the electric wire. After that, the pulling head 1705 pulls out the electric wire.

When the drawing head 1705 receives the wire W2 in this way, the wire W2 is gripped by the two pairs of grippers 2101 and 2103 of the grip conveying unit 21, and is in a stable posture without bending or the like. Therefore, the gripping position of the pull-out jig becomes a predetermined position as intended, and thus, also contributes to keeping the length accuracy of the electric wire high in this regard.

Next, a drawing head retracting member in the electric wire drawing length measuring apparatus according to the embodiment of the present invention will be described with reference to fig. 16. A pull-out head 1705 with a gripper 1701 is carried on an overload release slide 1710. The overload release slide base 1710 is mounted on the moving base 1731 so as to be movable in the front-rear direction along the overload release rail 1711.

The overload release slide base 1710 is biased forward relative to the moving base 1731 by the air cylinder 1716. That is, an air cylinder 1716 is fixed to the moving stage 1731, and a rod 1717 of the air cylinder is connected 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 a chamber 1716b on the rod side of the cylinder 1716 and a surface 1718c on the rear side of the piston 1718 in the cylinder.

In a normal state described below, as shown in fig. 16, the rod 1717 and the piston 1718 are in a state close to 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 an abnormality described below, the piston 1718 relatively moves to the rear side, and the sensor 1723 detects the movement.

The biasing force of the cylinder 1716 is higher than the maximum drawing force of the normal electric wire due to the resistance of the leveler 1110 (fig. 13) to the normal electric wire. That is, normally, the overload release slide 1710, the pull-out head 1705, and the jig 1701 operate in synchronization with the operation of the moving table 1731, and the electric wire can be pulled out.

On the other hand, when the bending of the electric wire is too strong and the resistance becomes too large, or when an abnormal situation such as a poor wire conveyance due to a failure of the reel holder (electric wire feeding device) 10 or the like occurs and the pull-out force applied to the pull-out head 1705 becomes a predetermined value or more, the rod 1717 is pulled out from the air cylinder 1716 and the overload release slide 1710 and the pull-out head 1705 are retracted (retreated) in a direction opposite to the pull-out side (rear) direction. At this time, the magnetic sensor 1723 detects this and notifies the operator of it by an alarm or the like to prompt confirmation. Then, the operator checks the electric wire and the device, and performs processing such as removing the cause of overload applied to the electric wire. This can prevent failures caused by device failure, wire abnormality, and the like.

The wire turning section between the two terminal crimping machines of the terminal crimped wire manufacturing apparatus of the present embodiment will be described.

In the case of a thick wire, since the wire itself has a low degree of freedom of twisting (torsion) 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 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 a power wire for an automobile harness has been increased, and the requirement for the accuracy of the angle of the terminal at both ends thereof has been becoming stricter.

As a document disclosing a turning member that turns a terminal-crimped wire around an axis line, there is japanese patent laid-open No. 2009-152104 (patent document 11, compatible electric device). In fig. 3 and 4 of the document and in paragraphs 0053 to 0057 of the specification, a wire end rotating portion 33 is disclosed. However, the wire end rotating portion 33 of the document 11 is used for adjusting an angle when the wire having terminals crimped at both ends is placed on the wire holding rod 10 as a wire storage tool, and is not used for twisting the entire wire at an intermediate stage of crimping the terminals at both ends of the wire. That is, it is not a technique that corresponds to the problem of adjusting (changing the angle) the angle between the terminals at both ends (the angle around the long axis of the electric wire) by twisting the electric wire.

As a document also disclosing a turning member that turns an electric wire in a terminal crimping electric wire around an axis, there is japanese patent laid-open No. 2008-10375 (patent document 12, JAPAN auto mate MACHINE co., LTD). Fig. 1, 2, 3 and paragraphs 0036 to 0042 of the patent document disclose a harness manufacturing apparatus including a wire rotating mechanism 80A that rotates an end of a wire after completion of crimping of a terminal and a wire rotating mechanism 80B that rotates an end of a wire without crimping of a terminal. However, in the wire turning mechanism of document 12, only the rear end portion of the wire to which the terminal T is crimped at the tip end is gripped, that is, the entire wire is not twisted in a state in which the tip end portion to which the terminal is crimped is turned but is not restrained. Therefore, both ends of the electric wire require an electric wire rotating mechanism, respectively.

Further, as a document disclosing a turning member that turns an electric wire in a terminal crimping electric wire around an axis, there is japanese patent No. 5048885 (patent document 13, JAPAN auto MACHINE co., LTD). Fig. 4 of this document discloses a member 10 for adjusting an angle of a terminal in a direction around an axis of an electric wire. However, the angle adjusting member 10 of this document 13 is used for adjusting the angle when inserting the electric wire having terminals crimped at both ends into the connector housing, and 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, it is not a technique that corresponds to the problem of adjusting (changing the angle) the angle between the terminals at both ends (the angle around the long axis of the electric wire) by twisting the electric wire.

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

Patent document 12: japanese laid-open patent publication 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 efficiency can be improved without causing any trouble to the process after the terminal is crimped.

B) The angle of the heavy thick wire can be accurately adjusted in a short time.

The electric wire both-end terminal crimping device of the present invention is characterized by comprising: an electric wire feeding unit (11) for feeding an electric wire (W1); a wire cutting unit (15) that cuts the supplied wire at an arbitrary length; a tip coating layer stripping section (23) for stripping the coating layer of the tip of the electric wire (W2, W3); a tip terminal crimping part (27) which crimps the terminal to the tip end part from which the coating layer is peeled; a rear end coating stripping part (33) which strips the coating at the end of the electric wires (W2, W3); a rear terminal crimping part (37) which crimps the terminal to the end of the wire from which the coating is peeled; and a grip conveying part (21, 31) that grips the electric wire and conveys the electric wire to each part, the electric wire both-end terminal crimping device further comprising an electric wire turning part (32) provided between the front end terminal crimping part (27) and the rear end terminal crimping part (37), the electric wire turning part (32) turning by gripping only a rear end part of the electric wire with the terminal T crimped at the front end, thereby turning the electric wire (W3) as a whole about an electric wire longitudinal direction axis by a desired angle in a state where the front end part with the terminal crimped is turned rotatably without being restrained.

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

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

Fig. 18 is a diagram showing a specific configuration of the wire turning portion 32 of fig. 17, in which fig. 18 (a) is a side view and fig. 18 (B) is a front view.

The wire turning unit 32 includes a gripper 3201 that grips the base WB of the wire W3, an opening and closing mechanism 3203 of the gripper 3201, and a turning motor 3227. In fig. 17 (a), a portion of the wire W3 near the base WB is gripped by a jig 3101 of the rear-end gripping and conveying unit 31. A terminal T1 is crimped to the front portion WT of the wire W3, and the tip of the terminal T1 is inclined to the right in the drawing. Also, the base WB of the wire W3 is inserted into the jig 3201 of the wire turning part 32 in the open state.

Fig. 17 (B) shows a state where the turning jig 3201 is closed to grip the wire base WB. Then, the conveyance jig 3101 is slightly opened thereafter. Here, the front portion WT of the wire W3 is laid on the table 3102 of the rear clamp conveyor 31 without being clamped, held, restrained, or rotated. Here, as shown in fig. 17 (C), the rotating jig 3201 is rotated counterclockwise by 90 ° to rotate the electric wire W3. At this time, the front end of the front terminal T1 of the electric wire W3 is raised upward. As described above, in the wire turning part 32 of the present embodiment, only the rear end portion of the wire is gripped, and the tip end portion to which the terminal is crimped is twisted in a turnable, non-restrained state.

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

A specific configuration of the electric wire turning part 32 according to the present embodiment will be described with reference to fig. 18. The rotating jig 3201 has jaws 3201b, 3201c opened up and down in fig. 18. As shown in fig. 18 (B), each clip has a shallow V-shaped peak 3201 g. As shown in fig. 18 (a), the peak portions 3201g are thin plate-shaped in a side view and are provided in a plurality of rows. The adjacent ridges 3201g form groove-like valleys 3201 j.

When the rotating jig 3201 is closed, the head portions (right and left triangular pointed portions when viewed from the front) of the peak portions 3201g enter the valley portions 3201 j. In this example, the mountain 3201g has 3 upper clips 3201b and 4 lower clips 3201 c. With such a configuration in which a plurality of valleys are provided, the electric wire W3 can be firmly gripped.

A jig opening and closing mechanism 3203 formed of an air cylinder or the like is provided on the base side of the jig 3201. A turning body 3207 is connected to the base side of the jig opening and closing mechanism 3203. The rotating body 3207 is rotatably held with respect to the frame 3211. A large pulley 3221 is attached to a base end of the rotating body 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 reducer-equipped rotation motor 3227. The rotary motor 3227 is a servo motor, and can be stationary at an accurate rotational position and angle. This makes it possible to rotate the thick electric wire while holding only the rear end portion, thereby accurately determining the angle.

A terminal crimping machine of the terminal-crimped wire manufacturing apparatus according to the present embodiment will be described. Thick wire for wire harness of automobile (for example, stranded wire having cross-sectional area of 8 sqmm)²～20sqmm²) The terminal crimping machine of (1) 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 requirements for the accuracy of the terminal crimping shape are becoming more and more strict. Therefore, in the case of the crimper frame which is a cantilever which is currently usual, there is a risk of insufficient rigidity.

Japanese patent application publication No. 2513288 (patent document 51) discloses a servo press in which an upper die 1 is supported by left and right supports (lifting frames 9). In the servo press of patent document 51, a ball screw shaft 6 and a screw joint 8 are arranged in an axial portion of a servo motor 4, and the servo press rotates the motor 4 and the screw joint 8 to move the ball screw shaft 6, a lifting frame 9, and an 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 the left and right supports (lifting frames 9), and the screw joint 8 that moves 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 is required. For example, when a motor having a shaft torque of about 300N · m is used, the outer diameter thereof is from φ 350mm to φ 450mm, and the dimension between the struts increases.

The disadvantages in the case where the size between the pillars becomes large are as follows.

(A) Depending on the size of the indenter holder (see reference numeral 2731 in fig. 19 and 20, also referred to as a "slider"), the accuracy such as parallelism between the indenter holder and the applicator stage (see reference numeral 2741 in fig. 19 and 20, also referred to as a "bed surface") is reduced accordingly.

(B) Depending on the position where the concentrated load is applied, flexure corresponding to the size and rigidity of the slider occurs, and the die (applicator) used is subjected to a process depending on the rigidity thereof, which may reduce the die life.

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

The present invention aims to solve at least one of the following problems relating to a servo press and a terminal crimping machine for a thick wire.

A) A standard and small motor can be used.

B) The combination of the motor and the reduction mechanism has many options.

C) The distance between the struts is not enlarged more than necessary, and the accuracy of parallelism between the slider and the bed surface and the deflection at the time of concentrated load loading correspond to the size and rigidity of the slider.

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, wherein the upper die (2711) is a movable tool, the lower die (2721) is a fixed tool facing the upper die, and the upper die driving member drives the upper die (2711), and the servo press is 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) that is a rotational drive source of the feed screw, the motor (2794) rotating about an axis offset from a rotational axis of the feed screw; and a rotation transmission mechanism (2757, 2754, 2751) that transmits the rotation of the motor to the feed screw (2781).

A terminal crimping machine (2700) of the present invention includes: a crimper (2711) which is a movable tool for crimping a terminal (T) to an end of a wire (W); an anvil (2721) that is a fixing tool opposing the crimper; and a crimper drive part driving the crimper (2711), the terminal crimper (2700) being characterized by comprising: a feed nut (2771) that linearly drives the crimper; a feed screw (2781) in threaded engagement with the feed nut; a motor (2794) that is a rotational drive source of the feed screw, the motor (2794) rotating about an axis offset from a rotational axis of the feed screw; and a rotation transmission mechanism (2757, 2754, 2751) that transmits the rotation of the motor to the feed screw (2781).

A specific embodiment of a servo press or a terminal press of the present invention includes: a ram (2701) that drives 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 (2731h, 2731m) of the indenter holder (2731) and the left and right side portions (2767h, 2767m) of the nut holder (2767), respectively; an applicator stage or die stage (2741) on which the anvil or lower die (2721) is mounted, the tie bars (guide rods, 2734) penetrating through both left and right side portions (2741h, 2741m) of the applicator stage or die stage (2741); and rod guide portions (2745L, 2745R) fixed to the left and right side portions (2741h, 2741m) of the stage.

A motor (2794) is disposed 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) does not need to be placed between the two struts (tie rods (2734)), and the strut spacing can be reduced. Therefore, the size and deflection of the indenter 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.

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

Hereinafter, a terminal crimping machine according to an embodiment of the present invention will be described with reference to the drawings. Fig. 19 is a side view and fig. 20 is a front view of a crimper 2700 according to the embodiment of the present invention. The crimping machine 2700 is a device for crimping the terminal T to the tip end of the electric wire W from which a part of the covering is peeled. The crimper 2700 includes 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. Holding member 2724 is placed on applicator mounting stage 2737 by applicator base 2727. Further, the anvil 2721, the crimper 2711, and the feeding mechanism 2715 of the terminal T are assembled as an applicator AP according to the kind and size of the terminal. When the kind and size of the terminal are changed, the terminal is replaced together with the applicator AP.

Shank 2707 to which crimper 2711 is secured. The shank 2707 is hung by engaging with the ram bolt 2703. The indenter bolt 2703 protrudes above the lower surface of the indenter 2701. The handle 2707 is part of the applicator AP and the ram bolt 2703 and ram 2701 are part of the body of the crimper (press).

The indenter 2701 is provided in a block shape so as to protrude downward from the center of the lower surface of an indenter holder (upper connecting rod) 2731. The indenter holder 2731 is a relatively thick band-shaped member extending right and left. Two pull rods 2734L and 2734R (support posts and guide rods) hanging downward are fixed to the left and right side portions 2731h and 2731m of the indenter holder 2731.

The tie bars 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 coupling bar) 2767, and fix the lower ends thereof. In the crimping machine 2700, upper and lower ram holders (upper connecting rods) 2731, nut holders (lower connecting rods) 2767, and left and right guide rods (tie rods) 2734L and 2734R form a rectangular frame. Then, the frame is driven up and down to move the ram 2701 and the pressure connector 2711 up and down.

An upper portion of the rod guide 2745 is fixed to the applicator stage 2741, and a 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) that rotatably supports a feed screw 2781 described later, and the bearing holder 2761 is a thick, belt-shaped member. The left and right rod guides 2745L and 2745R, the applicator stage 2741, and the bearing holder 2761 themselves are rigid structures and are rigidly fixed to a support stage, not shown.

A bushing 2735 that guides the guide bar 2734 to be slidable vertically is disposed in the guide portion 2745.

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

The feed screw 2781 is a ball screw shaft extending vertically. A driven pulley 2751 is fixed to an 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 box 2771 and the nut holder 2767 move up and down. The feed screw 2781 rotates only without moving up and down.

The belt 2754 is engaged 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. A servo motor 2794 is integrally provided below the motor reducer 2791. The motor reducer is firmly fixed to a support stand not shown.

In the crimping 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 side opposite to the applicator stage 2741 through left and right rod guide portions 2745L and 2745R. Windows 2750 are opened between the left and right rod guides 2745L, 2745R and the upper and lower applicator stages 2741, 2761. The driven pulley 2751 is disposed in the window 2750. With such a structure, the rod guide portion 2745 can be extended to suppress the falling of the rod 2734, and the height of the entire crimping machine can be reduced.

Another mode of the terminal crimping machine 2800 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 replacement function is improved, and fig. 22 is a top view. The front (front side), rear (base side) and left-right directions in fig. 22 correspond to the directions of the front terminal crimping part 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, see fig. 19 and 20) for crimping a terminal (T) to an end of a wire (W), an anvil (2721), and a terminal feeding mechanism (2715); a crimper driving part that drives the crimper (2711); and an applicator stage (2741) on which the Applicator (AP) is mounted, wherein a slide rail (2739) that guides the Applicator (AP) in a sliding manner between an operating position (2741x) and a standby position (2823y) of the applicator is provided on the upper surface of the applicator stage (2741).

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

The operating position (2741x) of the applicator is a position where the Applicator (AP) is located below the ram 2701 (see fig. 20) of the crimper main body and crimps the terminal T to the end of the electric wire W. The standby positions (2823y, 2871y) of the applicator are positions outside the crimping machine main body where the crimping operation is not obstructed, and are standby positions of the applicator which is next attached to (or removed from) the crimping machine.

In the terminal crimping machine (2800) of this embodiment, since slide rails (2739, 2871) for slidably guiding the Applicator (AP) are provided between the operating position (2741x) and the standby positions (2823y, 2871y) of the applicator, the applicator can be easily removed and attached. In addition, the applicator can be replaced in a short time.

In the crimper (2800) of the present invention, it is preferable to provide two types of slide rails (2739, 2871) for side feed (side feed) and end feed (end feed). And can correspond to any type of applicator. Further, "side feed" refers to a mode of feeding a strip-like terminal row in which a plurality of terminals are arranged from a lateral direction (a direction intersecting with a wire insertion direction) of the crimper main body, and "end feed" refers to a mode of feeding the terminal row from a longitudinal direction (a direction along the wire insertion direction). When the crimper main body is a two-leg type as shown in fig. 20, the slide rails (2739, 2871) may be extended in a direction obliquely intersecting with a line connecting the centers of the two legs.

In fig. 21, the side feeding applicator APS at the operating position 2741x is shown on the left side of the figure, and the side feeding applicator APS' at the standby position 2823y is shown on the right side of the figure. The applicator APS in the operating position 2741x is carried via its applicator base 2727 on a slide track 2739 on the applicator stand 2741. On the other hand, the applicator APS' at the standby position 2823y is placed on a slide rail (side stand) 2823 on the stand 2831 via its applicator base 2727.

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

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

The left fixed jaw 2742 is fixedly secured to the applicator stage 2741, slide rail 2739. When the base 2727 of the replaced applicator enters the operating position 2741x, the base 2727 hits the left fixed claw 2742 and stops. The right fixing claw 2743 is detachable. Alternatively, the fixing claws 2742 and 2743 can be fixed, released, and retracted by a known lever mechanism or actuator. When the applicator APS is moved in and out of the operating position 2741x, the right fixing claw 2743 is released from the fixing and retreats.

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

The rail grooves 2823b are formed on the upper surface of the side stage 2823 so as to extend in the left-right direction. The track groove 2823b of the stage 2823 and the track groove 2739b of the slide rail 2739 on the applicator stage 2741 have the same width and depth, and the two grooves 2823b and 2739b are linearly connected 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, front applicator APS2 is in a position contiguous with operative position 2741 x. The applicator APS2 is a device that has been pulled from the operating position 2741x or is to be set at the operating position 2741 x. The rear applicator APS1 is a device that retracts the stage 2823 by sliding it backward after being pulled out from the operating position 2741x, or a device that places the stage 2823 at the operating position 2741x after the stage 2823 is slid forward.

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

The rear side end 2871t of the end feeding slide 2871 extends to a position close to a side surface 2739t at an operating position 2741x at the right end of the side feeding slide 2739. In the operating position 2741x, an end portion feeding rail groove 2739c extending in the front-rear direction is formed so as to be orthogonal to the side portion feeding rail groove 2739 b. The rail groove 2739c and the rail groove 2871b for feeding the end portions of the two rails are formed to penetrate in a straight line. In addition, the two slide rails 2871, 2739 and the two rail grooves 2871b, 2739c have the same height.

With such a structure of the slide rails 2871, 2739, the end feeding applicator APE can slide between the operating position 2741x at the center portion of the crimper body and the standby position 2871y apart from the center portion. Thus, the applicator APE that is emitted from the operating position 2741x and slid to the standby position 2871y can be detached at the standby position 2871y with a crane or the like. In the case where the side feeding applicator APS is used next, the side feeding applicator APS can be quickly set at the operating position 2741x after the end feeding applicator APE is slid from the operating position 2741x, and the terminal crimping operation can be restarted.

Claims (8)

1. A terminal crimping device (300), the terminal crimping device (300) comprising:

terminal crimping machines (27, 37) for crimping the terminal (T) to the end of the wire (W) from which the coating layer has been peeled; and

a wire clamping and conveying part (21, 31) which grips the wire and inserts the end of the wire into the terminal crimping machine,

the terminal crimping device (300) is characterized in that,

the wire clamping and conveying section (21, 31) is provided with:

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 of the electric wire into the terminal crimping machine (27, 37); and

an elongation absorbing mechanism (320) which makes the clamp (211) move backwards corresponding to the elongation of the electric wire when the terminal is pressed,

the elongation absorbing mechanism (320) comprises:

a telescopic biasing member (323) that biases the jig (211) in the direction of the terminal crimping machine, and deforms by receiving a force equal to or greater than a predetermined value in the direction opposite to the insertion direction; and

and a biasing force adjusting member (327) that adjusts the force at the start of expansion and contraction of the expansion and contraction biasing member (323).

2. The terminal crimping device according to claim 1,

the terminal crimping device further has an insertion position defining member (329) that defines an insertion position of the clip (211) urged by the telescopic urging member (323).

3. The terminal crimping device according to claim 1 or 2,

the telescopic biasing member (323) is a spring.

4. A terminal crimping device (400), the terminal crimping device (400) comprising:

a terminal crimping machine (27 ', 37') for crimping the terminal (T) to the end of the wire (W) from which the coating layer has been removed; and

a wire clamping and conveying part (21 ', 31') which grips the wire and inserts the end of the wire into the terminal crimping machine,

the terminal crimping device (400) is characterized in that,

the wire clamping and conveying part (21 ', 31') comprises:

a clamp (411) for holding a base side portion of an end portion of the electric wire;

a jig driving member (448) which drives the jig to insert the end of the electric wire into the terminal crimping machine (27 ', 37'); and

an elongation absorbing mechanism (420) which makes the clamp (411) move back corresponding to the elongation of the electric wire when the terminal is pressed,

the elongation absorbing mechanism (420) comprises:

a start elongating crimp height detecting means that detects whether or not a crimp height at which a core wire of the electric wire starts to elongate due to terminal crimping has been reached; and

and a cylinder (423) which operates in synchronization with the stretch-start pressure-contact height detection means and allows the jig (411) to retreat.

5. A terminal crimping device as claimed in claim 4,

the cylinder (423) is a pneumatic cylinder, and a valve (463) for exhausting or reducing the pressure in the pneumatic cylinder in synchronization with the pressure-contact start height detection means is attached to the cylinder (423).

6. A terminal crimping device as claimed in claim 4,

the cylinder (423) is an electric cylinder with a servo function that can perform torque control.

7. A terminal crimped wire manufacturing apparatus comprising:

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

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

wire coating stripping sections (23, 33) for stripping coatings from the ends of the wires (W2, W3);

a terminal crimping machine (27, 37) which crimps the terminal to the end of the electric wire from which the covering is peeled; and

an electric wire holding and conveying section (21, 31) which holds the electric wire and conveys the electric wire to each section,

the terminal-crimped wire manufacturing apparatus is characterized in that,

the terminal crimping machine (27, 37) and the wire gripping conveying part (21, 31) constitute the terminal crimping device according to any one of claims 1 to 6.

8. A manufacturing method of an end-processed electric wire, comprising the steps of: a step of feeding the wire; cutting the fed electric wire into an arbitrary length; a coating layer peeling step of peeling a coating layer at an end of the electric wire; and a terminal crimping step of crimping a terminal to the end of the electric wire from which the coating layer has been peeled off, the method for manufacturing the end-processed electric wire being characterized in that,

the terminal crimping device according to any one of claims 1 to 6 is used in the terminal crimping step.

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