JP7399201B2 - Terminal crimping machine, servo press, terminal crimped wire manufacturing device, and terminal crimped wire manufacturing method - Google Patents

Description

The present invention relates to a device for peeling off the coating (skin) from the end of an electric wire, and a device for crimping a terminal after stripping the coating. In particular, the present invention relates to a coating stripping device, a terminal crimping device, etc. suitable for electric wires having a relatively large diameter (for example, a stranded wire cross-sectional area of 8 sq (mm ² ) to 20 sq).

In order to automatically crimp terminals on thick electric wires or aluminum electric wires with low core wire strength, there are two issues: (1) coating waste (peeling waste) and (2) problems during terminal crimping. It is necessary to address the problem of bending due to wire stretching.

(1) Concerning coating waste To make incisions in the coating of thick electric wires to strip the coating, a semicircular arc-shaped coating stripping blade (cutting blade) that matches the wire core combination diameter (twisting diameter) is generally used. has been adopted. Note that a diamond-shaped blade is usually used to peel off the coating from wires other than thick wires. The reason for this is that when a diamond-shaped blade is used for thick wires, the remaining part of the coating that does not make the cut becomes large, and the wire is pulled back and the remaining part of the cut is torn off (see Figure 3 (C), paragraph 0034, etc.) This is because the resistance increases, which is undesirable. In addition, the shape of the torn portion becomes disordered, causing trouble and quality deterioration during terminal crimping.

In a reel-wound thick electric wire, the core wires, which are twisted together in a circular arc during manufacture, may be deformed into an elliptical shape due to the weight of the wire itself and the tension associated with reeling. In that case, although the above-mentioned semi-circular blade makes an incision in the coating, the peeled coating debris may get stuck to the blade shape. If subsequent work is continued in this state, quality deterioration such as defective cut shape of the coating may occur, so it is necessary to reliably remove adhered coating debris.

As a technical proposal for removing this coating waste, there is JP-A No. 2009-55766 (Patent Document 1, Zouken). In the technique of Patent Document 1, the stripping blade closing operation and the coating removal piece are moved toward the center of the wire side in conjunction with the swinging operation method, and after the coating is stripped, the coating removal piece is held, and the coating removal piece is held more than the stripping blade opening operation. The delayed opening operation removes coating debris from the peeling blade.

(2) Electric wire elongation during crimping When a terminal is crimped onto a thick electric wire, since the diameter of the wire core wire is relatively large, a phenomenon occurs in which the core wire stretches to a considerable extent when the terminal is crimped. Unless measures are taken to absorb this elongation of the wire, bending of the wire or buckling of the core wire may occur.

Japanese Patent Laid-Open No. 2015-211039 (Patent Document 2, KOMAX) proposes a method of absorbing the elongation of electric wires for the purpose of preventing electric wire bending. In the technique disclosed in Patent Document 2, a wire conveying gripper moves in the axial direction of the wire in response to elongation of the wire core wire that occurs during crimping, thereby preventing bending or buckling of the wire. The technique disclosed in Patent Document 2 requires sensing of the elongation state (elongation force and elongation dimension) of the wire core wire and complex synchronous control of the actuator that drives the wire conveying gripper.

Japanese Patent Application Publication No. 2009-55766 Japanese Patent Application Publication No. 2015-211039

SUMMARY OF THE INVENTION An object of the present invention is to provide a wire coating stripping device that can reliably remove firmly attached coating debris. Another object of the present invention is to provide a terminal crimping device that is equipped with a wire elongation absorbing mechanism with a relatively simple configuration that can absorb the elongation of the core wire that occurs during terminal crimping and prevent bending and buckling of the wire.
Furthermore, the present invention aims to solve one or more of the following problems regarding servo presses and terminal crimping machines for thick electric wires.
a) Standard and small motors can be used.
b) There are many options for combinations of motors and reduction mechanisms.
C) The distance between the posts will not be unnecessarily wide, and the accuracy of the parallelism between the slide and the bed surface, etc., and the deflection when applying a concentrated load will be in accordance with the size and rigidity of the slide.
e) The applicator is easy to replace and install.

In this "Means for Solving the Problems", "Claims", and a part of the specification, reference numerals of each part of the attached drawings are shown in parentheses, but this is only for reference. However, there is no intention to limit the scope of rights to those shown in the attached drawings.

The terminal crimping machine (2800) of the present invention includes: a crimper (2711) that is a movable tool that crimps a terminal (T) to the end of an electric wire (W); and an anvil (2721) that is a fixed tool that faces the crimper. A terminal crimping machine (2700) comprising: a crimper driving means for driving the crimper (2711), a feed nut (2771) for linearly driving the crimper, and a screw between the feed nut and the screw. a feed screw (2781) that is matched with the feed screw; a motor (2794) that is a rotational drive source for the feed screw and rotates around an axis that is offset from the rotational axis of the feed screw; (2781), a ram (2701) that drives the crimper (2711), a ram holder (2731) that holds the ram, and the feed nut (2781); a nut holder (2767) that holds the ram holder (2771), each of the left and right sides (2731h・m) of the ram holder (2731), and each of the left and right sides (2767h・m) of the nut holder (2767). The applicator mount (guide rod, 2734) is equipped with two tie rods (guide rod, 2734L/R) and the anvil (2721), and the tie rod (guide rod, 2734) passes through the left and right sides (2741h/m) of the anvil (2721). 2741), and rod guide parts (2745L/R) fixed to the left and right sides (2741h/m) of the mount, and the rotation transmission mechanism is rotationally driven by the motor (2794). A driving pulley (2757), a driven pulley (2751) that rotationally drives the feed screw (2781), and a belt (2754) that connects both pulleys, sandwiching the rod guide part (2745L/R). , a bearing (2764) that rotatably holds the feed screw (2781) and a bearing holder (2761) are provided on the opposite side of the applicator frame (2741), and a bearing holder (2761) is provided on the opposite side of the applicator mount (2741), and R), a window (2750) is open between the applicator stand (2741) and the bearing holder (2761), the driven pulley (2751) is arranged in the window, and the terminal ( A crimper (2711) and an anvil (272 1) for crimping T) to the end of the electric wire (W), and an applicator (AP) equipped with a terminal feeding mechanism (2715), the applicator stand (2741) The apparatus is characterized in that slide rails (2739 and 2823) are provided for slidingly guiding the applicator (AP) between the operating position (2741x) and the standby position (2823y) of the applicator.
The wire coating stripping device of the present invention includes a plurality of pair of stripping blades (231, 233) that cut into the coating at the end of the wire (W) from two directions; a stripping blade driving means (248) that opens and closes between the stripping blades (248), a clamp (211) that grips the base portion of the end of the electric wire, and driving the clamp to open and close the plurality of stripping blades (231, 233). ), insert the end of the electric wire between the two, and after making the cut of the stripping blade, pull the base part and move the covered part (WK) at the tip of the cut to the tip side of the stripping blade. a clamp conveying part (21, 31) that removes the peeling blade while leaving the peeling blade; It is characterized by comprising a coating dust removal member (241) that is driven reciprocally between positions.

The above-mentioned "a plurality of pairs of peeling blades that make incisions from two directions" does not exclude peeling blades in three or more directions or three or more pieces. The above "round trip" includes two or more round trips. The dust removal members include those that knock off the coating dust attached to the blade mold (for example, reference numerals 241, 241A, and 241B in FIG. 5) and those that grasp and carry it (for example, reference numeral 241C in FIG. 5).

The actuator of the coating dust removal unit includes a structure using an electromagnetic solenoid or the like in addition to an air cylinder. In addition, by changing the shape of the removal plate, it is possible to strike in an oblique direction, making it easier to strip off the covering debris. Specifically, this will be described later with reference to FIG. In addition, by using static neutralizing air blow, vacuum suction, etc. in combination, the removal performance is improved and the versatility is increased, such as expanding the application to thin electrical wires (which adhere to the stripping blade due to static electricity). An additional feature is that it is possible to easily combine an air outlet (including static electricity removal blow) and a vacuum suction device with the coating discharge guide path (discharge chute, piping) and movable removal plate.

The above-mentioned stripping blade driving means (248) preferably utilizes a servo mechanism that can adjust the amount of cut into the coating, such as the lowered position of the upper stripping blade, for each wire size. Further, it is preferable that the electric wire insertion mechanism of the clamp conveying sections 21 and 31 also utilizes a servo mechanism. Specifically, this will be described later in the description of the embodiments of the invention.

A terminal crimping device (300) of the present invention includes: a terminal crimping machine (27/37) that crimps a terminal (T) to the end of an electric wire (W) from which the sheath has been peeled; and a terminal crimping machine that grips the electric wire and A terminal crimping device comprising: a wire clamp transport section (21, 31) for inserting the end of the wire into the wire clamp transport section (21, 31), wherein the wire clamp transport section (21, 31) inserts the end of the wire into the base part of the end of the wire; a clamp (211) for gripping the terminal; a clamp driving means (348) for driving the clamp to insert the end of the wire into the crimping machine (27, 37); and an elongation absorption mechanism (320) for retracting the clamp (211), the elongation absorption mechanism (320) urging the clamp (211) in the direction of the crimping machine and in the anti-insertion direction. It is characterized by having a telescopic biasing member (323) that deforms when receiving a force exceeding a set value, and a biasing force adjustment member (327) that adjusts the force when the telescopic biasing member (323) starts to expand or contract. do.

Furthermore, it may include an insertion position defining member (329) that defines the insertion position of the clamp (211) biased by the telescopic biasing member (323). In the terminal crimping device of the present invention, the telescopic biasing member (323) may be a spring. The biasing force adjusting member (327) and the insertion position defining member (329) may be threaded members such as bolts.

By adding a mechanism using an elastic biasing member (323) such as a spring, it becomes possible to absorb the elongation of wires of different sizes when crimping terminals of wires of various sizes. Additionally, no complicated sensors or controls are required.

Another terminal crimping device (400) of the present invention includes a terminal crimping machine (27', 37') that crimps a terminal (T) to the end of an electric wire (W) from which the sheath has been peeled off, and a terminal crimping machine (27', 37') that grips the electric wire. A terminal crimping device (400) comprising: a wire clamp transport section (21', 31') that inserts the end of the electric wire into the terminal crimping machine, the wire clamp transport section (21', 31') However, a clamp (411) that grips the base portion of the end of the electric wire, and a clamp driving means (448) that drives the clamp and inserts the end of the electric wire into the crimping machine (27', 37'). ), and an elongation absorption mechanism (420) that retracts the clamp (411) in response to the elongation of the electric wire during terminal crimping, and the elongation absorption mechanism (420) It has the following: an elongation start crimp height detection means for detecting that the elongation start crimp height has been reached; and a cylinder (423) that operates in synchronization with the means and allows the clamp (411) to retreat. It is characterized by

The elongation start crimp height detecting means is, for example, a lowering position detector of a vertical drive mechanism of a crimper (275, see FIG. 9). Examples of the cylinder (423) include a pneumatic cylinder and an electric cylinder with a servo function that can control torque. If the structure allows synchronization of the downward stroke of the crimping press, etc., it is possible to cope with non-constant elongation by using an air cinder using an atmospheric release directional control valve or the like, or an electric cylinder capable of torque control.

Particularly preferable as the cylinder (423) is a pneumatic cylinder, and a valve (5-port exhaust center type (atmospheric (release type) directional control valve 463, etc.) is attached. By synchronizing the combination of an air cylinder and a pressure control valve with the crimp height, a combination of an air cylinder and a 5-port directional control valve at the exhaust center will result in a more advanced elongation absorption mechanism. When the crimping height reaches the point where the core wire begins to elongate due to crimping, the crimping can be temporarily stopped, a signal is output to the directional control valve at the same time, and the crimping can then be continued.

Furthermore, the forward and backward movement of the transport clamps (21, 31) is changed from the ball screw drive (347, 348) to an electric cylinder with a servo function, synchronized with the crimp height at which the core wire begins to elongate due to crimping, and the servo excitation is turned off or By lowering the torque, it is possible to absorb the wire elongation. In this case, the structure is simpler than the rack and pinion structure of Patent Document 2.

The terminal crimped electric wire manufacturing apparatus (1) of the present invention includes a wire feeding section (11) that feeds the electric wire (W1), and a wire cutting section (15) that cuts the fed electric wire to an arbitrary length. , a wire sheath stripping section (23/33) for stripping the coating from the end of the wire (W2/W3), and a terminal crimping section (27/37) for crimping a terminal to the end of the wire from which the coating has been stripped. , a terminal crimped electric wire manufacturing device comprising a clamp conveying section (21/31) that clamps the electric wire and conveys it to each section, wherein the electric wire sheathing stripping section (23/33) is connected to the electric wire sheathing stripping device (23). -33), or the terminal crimping section (27, 37) and the clamp transport section (21, 31) constitute the terminal crimping device (300, 400).

The method for manufacturing an end-treated electric wire of the present invention includes: a step of feeding an electric wire; a step of cutting the fed electric wire to a desired length; a coating stripping step of peeling off the coating on the end of the electric wire; A method for producing an end-treated electric wire, comprising: a terminal crimping step of crimping a terminal to the end of the wire from which the sheath has been peeled; The present invention is characterized in that the terminal crimping device described above is used in the crimping process.

As is clear from the above description, the wire coating stripping apparatus of the present invention can maintain and improve the quality related to the wire coating stripping pattern by reliably removing coating waste from the stripping blade. Furthermore, the debris chute (251) is surrounded by a tunnel structure and the coating debris removal member (241), forming a guide path for debris discharge, which also has the effect of preventing the coating debris from scattering.

The present invention can solve one or more of the following problems regarding a terminal crimping machine for thick electric wires.
a) Standard and small motors can be used.
b) There are many options for combinations of motors and reduction mechanisms.
C) The distance between the posts will not be unnecessarily wide, and the accuracy of the parallelism between the slide and the bed surface, etc., and the deflection when applying a concentrated load will be in accordance with the size and rigidity of the slide.
e) The applicator is easy to replace and install.
The terminal crimping device of the present invention uses an elastic biasing member (323), a cylinder (423), etc. to absorb the elongation of the wire during terminal crimping. It becomes possible to absorb wire elongation of different dimensions during terminal crimping. Thereby, it is possible to improve the quality of the terminal crimped electric wire product without bending or buckling the electric wire.

1 is a plan view schematically showing the overall configuration of a terminal crimped wire manufacturing apparatus according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a general configuration of a wire sheath stripping device (equipped with a scrap removal 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. 3 is a schematic side view showing the operation of the wire coating stripping device of FIG. 2; FIG. 7 is a perspective view schematically showing a modification of the dregs knocking-off mechanism of the wire coating stripping device. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing an overview of the overall configuration of a terminal crimping machine/wire clamp lateral conveyance according to an embodiment of the present invention. 7 is a diagram showing the configuration of the main part of the wire elongation absorption mechanism in the wire clamp lateral conveyance section of FIG. 6, in which (A) is a side cross-sectional view around the coil spring 323, and (B) is a side cross-sectional view around the stop bolt 329. It is. FIG. 8 is a perspective view of a main part of the wire elongation absorption mechanism in FIG. 7; FIG. 3 is a side view for explaining the action of the electric wire elongation absorption mechanism. (A) is a diagram of an embodiment of the present invention, and (B) is a diagram illustrating problems in the conventional technology. FIG. 4 is a side view showing an overview of the overall configuration of a terminal crimping device 400 according to another embodiment. 11 is an exploded perspective view showing the configuration of an elongation absorption mechanism 420 of the terminal crimping device 400 of FIG. 10. FIG. 12 is a side view of the elongation absorption mechanism 420 of FIG. 11. FIG. FIG. 2 is a side view schematically showing the arrangement of the wire feeding section 11, the clamp conveyance sections 21 and 31, the wire cutting section 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. be. A diagram showing the configuration of an electric wire draw-out length measuring device including first length measuring means 1780, 1783, 1790 for measuring the length of electric wire W and second length measuring means 2120, 2125 according to an embodiment of the present invention. It is. (A) is a side view of the clamp transport section 21, (B) is a front view of the second length measuring means 2120, 2125, and (C) is a side view of the wire drawing length measuring device 17. FIG. 15 is a block diagram of a measurement system of the wire drawer length measuring device shown in FIG. 14; FIG. 3 is a side view schematically showing the configuration of a pull-out head retracting means (air cylinder 1716, etc.) in the wire pull-out length measuring device 17 according to the embodiment of the present invention. FIG. 2 is a perspective view showing a general configuration and operation of a wire rotating section 32 of a wire both-end terminal crimping device according to an embodiment of the present invention. (A) shows the state in which the base part WB of the wire W3 is inserted into the clamp 3201 of the wire rotation part 32, (B) shows the state in which the rotation clamp 3201 is closed and the wire base part WB is gripped, and (C) ) is a state in which the electric wire W3 has been rotated 90° counterclockwise, and (D) is a state in which the rotating clamp 3201 is opened and the electric wire W3 is deposited on the rear clamp conveyance section 31. 18A and 18B are diagrams showing a specific structure of the electric wire rotating section 32 in FIG. 17, in which (A) is a side view and (B) is a front view. It is a side view of a crimping machine 2700 according to an embodiment of the present invention, 20 is a front view of the crimping machine 2700 of FIG. 19. FIG. FIG. 3 is a side view of a terminal crimping machine 2800 with an improved applicator exchange function. 22 is a plan view of the terminal crimping machine 2800 of FIG. 21. FIG.

W: Electric wire, WK: Covered part, W1: Electric wire to be fed, W2: Electric wire with tip cut, W3; Electric wire with tip cut T, T1, T2; Terminal
11; Electric wire feeding section, 15; Electric wire cutting section, 17; Electric wire lead-in length measuring section, 20; Running rail,
21; tip clamp conveyance section; 23; wire coating stripping device (wire coating stripping section, tip coating stripping section);
25; Tip inspection section, 27; Terminal crimping machine (terminal crimping section, tip crimping section), 30; Traveling rail,
31; Rear clamp conveyance section, 32; Wire rotation section,
33; Wire sheathing stripping device (wire sheathing stripping section, post-coating stripping section), 35; Post-inspection section
37; Terminal crimping machine (terminal crimping section, rear terminal crimping section), 41; Product receiving section
211; Clamp, 213; Clamp base, 215; Clamp opening/closing mechanism (air cylinder)
217; Clamp opening/closing mechanism base, 218; Mounting frame, 219; Vertical movement air cylinder with guide
231; Peeling blade (upper blade), 233; Peeling blade (lower blade), 237/238; Slider,
241; Covered waste removal member (plate), 241A/241B/241C; Covered waste removal member,
241x; claw member,
243; Drive means (actuator, air cylinder), 244; Air nozzle,
247; Vertical guide rail (column), 248; Peeling blade drive means (motor),
249; Ball screw with linear guide for opening and closing the peeling blade, 251; Waste chute
275; crimper, 283; anvil
300; Terminal crimping device
320; Elongation absorption mechanism, 321; Frame, 321r; Base plate, 321t; Spring accommodation hole,
321w; rear end surface, 321x; female thread
323; Expandable biasing member (coil spring)
327; Biasing force adjustment member (adjustment bolt), 327b; Front end, 327f; Center part
328; lock nut,
329; Stop bolt, 329b; Male thread, 329f; Cylindrical part, 329h; End face,
329j; Hexagonal hole part (head),
331; Bolt implant board, 331g; Through hole, 331k; Back side
333; Electric wire elongation absorption slider, 335; Guide, 341; Front and rear slide plate, 343; Slider
345; Front and rear guide, 347; Ball screw, 348; Motor (clamp drive means),
351; Horizontal slide table
400; Terminal crimping device, 411; Clamp, 419; Vertical movement air cylinder with guide
420; Elongation absorption mechanism, 421; Frame, 423; Cylinder, 423b; Rod
429; Stop bolt (positioning bolt),
430; Plate bolt planting board, 431g; Through hole, 432; Block,
433; Wire elongation absorption slider, 435; Guide,
445; Front and rear guide, 448; Motor (clamp drive means), 451; Lateral slide table
463;Directional control valve
WL; Electric wire reel, 10; Reel support
1000; Wire feeding/drawing length measuring device,
1110; Straightener, 1111/1113/1115/1117; Roller, 1501; Blade
1701; Clamp, 1705; Drawer head,
1710; Overload relief slide platform, 1711; Overload relief rail
1716; Evacuation means (air cylinder), 1716b; Rod side chamber; 1717; Cylinder rod,
1718; piston, 1718c; rear surface, 1719; pressure regulating valve, 1720; air piping,
1723; Operation detection means (magnetic sensor), 1731; Moving table
1770; head moving means; 1771; head moving rail;
1780; Moving belt (timing belt), 1783; Drive pulley, 1784; Driven pulley
1790; Moving motor, 1795; Encoder, 1798; Length difference calculation means
2101・2103; Clamp piece,
2120; Auxiliary length measuring roller, 2123; Air cylinder, 2125; Tachometer (encoder),
2130; Electric cable tunnel
2141; Wire guide horizontal roller, 2145; Wire guide vertical roller,
3101; Clamp piece
WB; Base of wire W3
31; Rear clamp transport section, 3101; Transport clamp, 3102; Stand
32; Wire rotating part, 3201; Rotating clamp, 3201b/c; Clamp piece,
3201g; mountain, 3201j; valley;
3203; Clamp opening/closing mechanism, 3207; Rotating barrel, 3211; Frame, 3220; Rotating means of opening/closing mechanism, 3221; Large pulley, 3223; Timing belt, 3225; Small pulley, 3227; Rotating motor
AP; applicator, APE; end feed applicator,
APS; side feed applicator
2700; Terminal crimping machine, 2701; Ram, 2703; Ram bolt, 2707; Shank
2711; Crimper (upper mold), 2715; Terminal feeding mechanism
2721; Anvil (lower mold), 2724; Anvil holder, 2727; Applicator base
2731; Ram holder (upper tie bar), 2731h・m; Both left and right sides
2734; Tie rod (guide rod, post), 2735; Bush,
2739; Slide rail, 2739b; Rail groove, 2739c; Enapplicator mounting stand
2739t; side
2741; Applicator stand (lower mold stand), 2741h・m; Left and right sides, 2741x; Operating position
2742/2743; Base fixing claw, 2742b/2743b; Surface
2745; Rod guide part, 2750; Window,
2751; Driven pulley, 2754; Belt, 2757; Drive pulley
2761; Bearing holder, 2764; Bearing (bearing box),
2767; Nut holder (lower tie bar), 2767h・m; Both left and right sides
2771; Feed nut (nut box), 2781; Feed screw,
2791; Motor reducer, 2794; Motor
2800; Terminal crimping machine, 2821; Rail
2823; Slide rail (side table), 2823b; Rail groove, 2823y; Standby position,
2831; trestle,
2871; Slide rail, 2871b; Rail groove, 2871t; Rear end, 2871y; Standby position

Preferred modes for carrying out the invention

Embodiments of the present invention will be described below with reference to the drawings. In each figure, the front-rear direction is the axial direction of the wire W, the left-right direction (lateral direction) is the direction in which the wire clamp conveyor section holds the wire W horizontally, and the up-down direction is the vertical direction of the crimper and coating stripping upper blade. (not limited to the direction of Earth's gravity).

First, with reference to FIG. 1, the overall configuration of a terminal crimping electric wire manufacturing apparatus for thick wires according to an embodiment of the present invention will be described.
The terminal crimped wire manufacturing apparatus 1 includes the following parts.
Wire feeding unit 11: Feeds the electric wire W1 in the vertical direction from a wire bundle (not shown) wound into a roll.
Cutting section 15: Cuts the electric wire W1 to be fed, and determines the length of the electric wire W3 to be cut before and after.
Electric wire lead-in length measuring section 17: Pulls the electric wire that has passed through the cutting section 15 in the forward direction. Stop at a position corresponding to the length of the terminal crimped wire that will become the product, and cut the rear end of the wire. The wire with both ends cut is called the front-end cut wire W3.

End clamp transport unit 21: Clamps the end of the electric wire (end-cut electric wire) W2 and transports it laterally. The electric wire W2 is conveyed to the left from the electric wire feeding position L0 to the crimping position L-3, and then returned to L0.
Traveling rail 20: Clamp transport section 21 runs.
Tip coating removal section 23: Strips off the coating of the electric wire W2 whose tip end portion has been cut.
Preliminary inspection section 25: Inspects the state of peeling of the coating at the tip of the electric wire.
Tip crimping part 27: Crimp the terminal T1 to the tip of the electric wire W2.

Rear clamp transport section 31: Clamps the front and rear cut electric wire W3 and transports it laterally. The electric wire W3 is received at the position of the electric wire lead-in part 17 (wire feeding position L0), conveyed to the right to the crimping position L4, the electric wire W3 is passed to the product receiving part 41, and then returned to L0.
Running rail 30: A rear clamp conveyance section 31 runs.

Electric wire rotation unit 32: Rotates the rear end of the electric wire around the shaft center, and adjusts the crimping position (posture) of the rear end terminal around the shaft to a specified position.
Rear coating removal section 33: Peels off the coating of the electric wire W3 whose rear end has been cut.
Post-inspection section 35: Inspects the state of peeling of the coating at the rear end of the electric wire.
Rear terminal crimping part 37: Crimp terminal T2 to the rear end of electric wire W3.
Product receiving part 41: Receives product wires with terminals crimped on both ends.

The coating stripping devices 23 and 33 will be explained with reference to FIGS. 2 to 4. Note that the direction shown in FIG. 2 is for the pre-coating peeling (peeling) part 23. As shown in each figure, the coating stripping devices 23 and 33 have an upper blade 231 and a lower blade 233 that cut into the coating of the electric wire. In this embodiment, both the lower blade 233 and the upper blade 231 are vertically movable. Specifically, the upper blade 231 is attached to the side of the upper slider 237, and the lower blade 233 is attached to the side of the lower slider 238. Both sliders 237 and 238 are driven vertically along a vertical guide rail (column) 247 by a ball screw 249 with a linear motion guide for opening and closing the peeling blade and its motor (peeling blade driving means) 248. Here, the upper and lower halves of the ball screw 249 are threaded in opposite directions (left-hand thread and right-hand thread), and the rotation of the ball screw 249 causes the sliders 237 and 238 to move away from each other. (blade open) or in the direction of approaching each other (blade closed).

A scrap removal member (plate) 241 for knocking off coating debris and an actuator (air cylinder) 243 for vertically driving the dust removal member (plate) 241 are attached to the side surface of the upper slider 237 (the right side surface in FIG. 2). These operations will be described below. A debris chute 251 is provided below the debris removal plate 241 for guiding fallen debris. Although not shown in FIG. 2, an air nozzle is also provided that applies an air flow to the coating waste.

The operation of the coating stripping devices 23 and 33 will be explained with reference to FIGS. 3 and 4. Note that FIGS. 3 and 4 are schematic diagrams, and are not consistent in shape and size with FIG. 2.
In FIG. 3(A), the peeling blades 231 and 233 are in an initial position where the blades are open, and the end of the electric wire W is inserted between the two blades. The dust removal plate 241 is in an upwardly raised state.

FIG. 3(B) shows a state in which the stripping blades 231 and 233 are closed and sandwiching the electric wire W. The cutting edge of the double-edged blade is cut into the sheathing of the electric wire W. The closed positions of the stripping blades 231 and 233 are selected and positioned according to the thickness of the electric wire W and the thickness of the coating by servo control of a motor (peeling blade driving means) 248. In addition, in the case of a thick electric wire W, the shape of the cutting blade differs depending on the type of electric wire W.

FIG. 3C shows a state in which the stripping blades 231 and 233 are slightly opened from the state shown in FIG. 3B, and the electric wire W is pulled in a direction away from the blades 231 and 233 (pullback state). To pull the electric wire W, the clamp transport sections 21 and 31 (see FIGS. 1 and 6 (described later)) move in the axial direction of the electric wire W while clamping the electric wire W. As a result, the portion of the wire coating (covering waste WK) beyond the blades 231 and 233 (left side in the figure) comes off from the tip of the wire W and remains on the left side of the blade. The core wire WC is exposed at the tip of the drawn electric wire W.

In Fig. 4(D), after the coating waste WK is separated from the electric wire W, the stripping blades 231 and 233 are slightly opened from the state shown in Fig. 3(C), and the upper and lower blades 231 and 233 are in a half-open state. . In this state, the coating waste WK is caught between the upper and lower blades 231 and 233. At this point, the dust removal plate 241 is moved up and down several times to knock off the coating dust WK. Covering waste WK falls into chute 251. Simultaneously with the operation of the dust removal plate 241, an air flow is applied from the air nozzle 244 to the coating dust WK. In addition, the reason why the coating waste WK is dropped with the upper and lower blades 231 and 233 in a half-open state is to take into consideration the air cylinder stroke position of the drive means (actuator, air cylinder) 243 that drives the waste removal plate 241. It is.

Thereafter, as shown in (E), the upper blade 231 and the lower blade 233 are opened to the initial position, and the wire W after the coating has been peeled is conveyed toward the subsequent process.

FIG. 5 is a perspective view schematically showing a modification of the dregs knocking off mechanism of the wire coating stripping device.
The dust removal member 241A shown in FIG. 5(A) is made up of a small dust removal plate 241 with a rod shape or protrusion shape attached thereto. The operation is similar to the above-mentioned dust removal plate 241, which is driven up and down to strip off coating dust. The advantage of this rod-shaped or protrusion-shaped scrap removal member 241A is that by installing the scrap removal member 241A at a position slightly shifted from the coating center position, the coating is knocked off diagonally from above, and the upper blade 231 or lower It becomes easier to remove coating debris stuck to the blade 233.

The scrap removal member 241B shown in FIG. 5(B) is a tapered member, and the portion at the tip that contacts the coating debris is thick. The operation is similar to the above-mentioned dust removal plate 241, which is driven up and down to strip off coating dust. The advantage of this tapered dust removal member 241B is that it starts hitting the bitten coating dust from the lateral portion and drops it along the taper angle, making it easy to remove the coating dust as well.

The scrap removal member 241C in FIG. 5(C) is of a chuck type and includes a pair of claw members 241x that open and close, and a mechanism that moves the claw members 241x. The coating waste is grasped with a chuck and peeled off from the peeling blade, and the coating waste is conveyed to a chute or suction section, where the chuck 241x is opened and the coating waste is carried away.

The above-mentioned stripping blade drive means (248) can control the opening and closing positions of the upper and lower stripping blades, especially the amount of cut of the stripping blade into the coating, and the position control of the half-open state shown in FIG. 3(C), which can be adjusted for each wire size. Preferably, it utilizes a possible servo mechanism. Further, it is preferable that the electric wire insertion mechanism (specifically, the front and rear slide motor 348 (FIG. 6)) of the clamp conveyance units 21 and 31 also utilizes a servo mechanism. This allows precise control of strip length adjustment, coating peeling operation, and crimping position adjustment.

A terminal crimping machine/wire clamp lateral conveying device according to an embodiment of the present invention will be described with reference to FIGS. 6 to 9. FIG. 6 is a side view showing an overview of the overall configuration of the device. FIG. 7 is a side sectional view showing the configuration of the elongation absorption mechanism for horizontal conveyance of the wire clamp in FIG. 6. FIG. 8 is a perspective view of the elongation absorption mechanism of FIG. 7. FIG. 9 is a schematic side view for explaining the action of the elongation absorption mechanism of FIG. 7. FIG. 9(A) is a diagram of an embodiment of the present invention, and FIG. 9(B) is a diagram illustrating problems of the conventional technology.

This apparatus, whose overall configuration is shown in FIG. 6, is composed of terminal crimping sections 27 and 37 and clamp conveying sections 21 and 31.
As shown in FIG. 9, the terminal crimping sections 27 and 37 crimp the terminal T onto the end of the wire W from which the coating has been peeled off. The terminal crimping parts 27 and 37 include a crimper 275 that is an upper crimping tool that moves up and down, an anvil 283 that is a fixed lower tool, and the like.

The clamp devices 21 and 31 include a clamp 211 for gripping the electric wire W and a mechanism 215 for opening and closing the clamp. A clamp base 213 on which the clamp 211 is mounted is mounted on a clamp opening/closing mechanism 215, and the clamp opening/closing mechanism 215 is attached to a clamp opening/closing mechanism base 217, which includes a mechanism for moving up and down during crimping. The clamp opening/closing mechanism base 217 is fixed to a pedestal 218. The pedestal 218 is mounted on a pedestal 321 of a wire stretch absorption mechanism 320 via a vertically movable air cylinder 219 with a guide.

The pedestal 321 of the wire elongation absorption mechanism 320 is mounted on the wire elongation absorption slider 333, and can be slightly slid in the front and rear directions on the guide 335 and the front and rear slide plate 341. The wire elongation absorption mechanism 320 is one of the characteristic parts of the present invention, and will be described in detail later with reference to FIGS. 7, 8, and 9.

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

As shown in FIG. 7, the wire elongation absorption mechanism 320 includes main parts such as a coil spring 323 and its adjustment bolt 327 in addition to the above-mentioned pedestal 321 and slider 333.
The coil spring 323 is housed in a spring housing hole 321t carved in the base plate 321r of the pedestal 321. The spring housing hole 321t extends in the front-rear direction, and its rear end opens to the rear end surface 321w of the base plate 321r.

The head (front end 327b) of the spring adjustment bolt 327 is inserted into the rear end portion of the spring housing hole 321t, and comes into contact with the rear end of the coil spring 323. A center portion 327f of the adjustment bolt 327 in the front-rear direction is screwed into a female thread 331f of the bolt planting plate 331. As shown in FIG. 6, the bolt planting plate 331 is fixed to the rear end of the front and rear slide plate 341 so as to rise upward. When the bolt 327 is screwed into the female thread 331f and the bolt 327 is advanced forward, the coil spring 323 is compressed. A lock nut 328 is also screwed into the bolt 327, so that the position of the bolt 327 in the longitudinal direction can be fixed.

As clearly shown in FIG. 8, two stop bolts 329 are provided on the left and right sides of the spring adjustment bolt 327. As shown in Fig. 7(B), the stop bolt 329 has a male thread 329b cut in the front part, a hexagonal socket part (head) 329j in the rear end part, and a cylindrical part 329f in the middle part. There is. The front male thread 329b of the stop bolt 329 is screwed into a female thread 321x formed at the rear end of the base plate 321r of the pedestal 321. Thereby, the bolt 329 is fixed so as to extend rearward from the end surface 321w of the base plate 321r.

The intermediate cylindrical portion 329f of the stop bolt 329 passes through the through hole 331g formed in the bolt planting plate 331 in a non-contact state. In the state of FIG. 7, the front end surface 329h of the head 329j of the stop bolt 329 is in contact with the rear surface 331k of the bolt planting plate 331. This is because the base plate 321r is biased forward by the compression force applied to the coil spring 323, and this biasing force has the effect of pulling the stop bolt 329 fixed to the base plate 321r forward. This is because they are doing so. After all, the stop bolt 329 determines the limit of advancement of the base plate 321r. The forward limit of this base plate 321r ultimately determines the insertion position of the front end of the electric wire W into the terminal crimping portions 27 and 37. Note that when the clamp 211 is pushed by the elongated electric wire and the coil spring 323 contracts when the terminal is crimped, the stop bolt 329 is moved back by the amount of the contraction.

When the spring adjustment bolt 327 is screwed in (advanced) in the state shown in FIG. 7, the coil spring (expandable biasing member) 323 is compressed and the biasing force (set load for starting the expansion/contraction) becomes stronger. On the other hand, when the spring adjustment bolt 327 is pulled out (moved backward), the coil spring 323 expands and the biasing force (set load for starting the expansion/contraction) becomes weaker. As will be described below with reference to FIG. 9, the clamp 211 that grips the wire is pushed rearward due to the elongation of the wire during terminal crimping, and the pushing force is transmitted to the pedestal 321. When the pushing force exceeds the set load of the coil spring 323, the spring 323 contracts, and the pedestal 321 and the clamp 211 move backward (the elongation absorbing slider 333 slides backward on the guide 335).

The operation of the electric wire elongation absorption mechanism will be explained with reference to FIG. (A) is a diagram of an embodiment of the present invention, and (B) is a diagram illustrating problems in the conventional technology. In the conventional technique shown in (B), there is no retraction mechanism for the clamp 211, so the electric wire W is bent upward in the figure in a V-shape due to the influence of the electric wire elongation during crimping. On the other hand, in the embodiment of the present invention shown in (A), since there is a retraction mechanism for the clamp 211, the clamp 211 is retracted by the amount of wire elongation during crimping, so that 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 FIGS. 10, 11, and 12. FIG. 10 is a side view showing an overview of the overall configuration of the terminal crimping device 400. FIG. 11 is an exploded perspective view showing the configuration of the elongation absorbing mechanism 420 of the terminal crimping device 400 of FIG. 10. FIG. 12 is a side view of the elongation absorption mechanism 420 of FIG. 11.

The present device 400, the overall configuration of which is shown in FIG. 10, includes terminal crimping sections 27' and 37' and clamp conveying sections 21' and 31'. The terminal crimping parts 27' and 37' of this device 400 have the same structure and function as the terminal crimping parts 27 and 37 in FIG. In the clamp conveying sections 21' and 31' of this device 400, parts indicated by numerals with 100 or 200 added to the numerals in FIG. 6 are parts having similar functions. The specific correspondence relationship is as described in the column of explanation of the symbols.

The electric wire elongation absorption mechanism 420, which is a characteristic part of this embodiment, includes an elongation start crimping height detecting means for detecting that the core wire of the electric wire has reached the crimping height at which elongation starts due to terminal crimping, and a wire elongation absorption mechanism 420 that is synchronized with the elongation start crimping height detecting means. and a cylinder 423 that allows the clamp 411 to retreat. The elongation start crimping height detecting means is a lowering position detector of the vertical drive mechanism of the crimper (275, see FIG. 9) of the crimping portions 27' and 37'. If the vertical drive mechanism is a servo press type, the lowering position of the crimper can be determined by the rotational position (encoder) of the drive motor. The crimp height at which elongation starts can be determined for each type and size of wire, and the value can be stored in the controller of the device.

Cylinder 423 is an air cylinder 423 in this embodiment. An air pressure regulator 461 and a 5-port exhaust center type (atmospheric release type) directional control valve 463 are connected to the air cylinder 423 via a pneumatic pipe (schematically shown by a dashed line). The direction control valve 463 opens both the chamber on the rod 423b side and the chamber on the opposite rod side in the pneumatic cylinder 423 to the atmosphere in response to the signal of the detection of the elongation start crimp height. This allows the air cylinder 423 to move in the direction of the force applied to the rod 423b.

That is, when a force due to the elongation of the electric wire is applied to move the clamp 411 backward, the rod 423b of the cylinder 423 contracts by ΔS shown in FIG. 12. Then, the block 432 and the clamp 411 connected thereto can be retracted by that amount. In addition, in this embodiment, when the crimping height is reached at which the core wire begins to elongate due to crimping, the crimping is temporarily stopped, a signal is output to the direction control valve 463 at the same time, and then the crimping is continued. It is.

A stop bolt (positioning bolt) 429 shown in FIG. 11 has the same structure and function as the stop bolt 229 shown in FIG. 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 planting plate 331 in FIG. Note that the hole 430f in the center of the plate 430 is a through hole in which the rod of the cylinder freely moves. Further, bolts and the like for attaching the block 432 and the cylinder rod 432b are not shown in FIG.

As a modification of the elongation absorption mechanism, the forward and backward movement of the transport clamps 21 and 31 is changed from ball screw drive 347/348 to an electric cylinder with servo function using pressure control for thrust adjustment, synchronized with the crimp lower limit position, and servo Wire elongation can also be absorbed by turning off the excitation or reducing the torque. In this case, the structure is simpler than the rack and pinion structure of Patent Document 2.

The wire drawing length measurement of the terminal crimped wire manufacturing apparatus according to the present embodiment will be explained.
In thick electric wires, due to the following circumstances, it is difficult to sufficiently remove the winding curl of the wire, and it is also difficult to measure the length of the wire to be cut. In other words, since the weight per unit length of the wire increases, in the conventional feed roller method, when the load increases, slip occurs between the roller surface and the wire coating surface, and the amount of feed on the roller side and the actual amount of feed are Errors are likely to occur in the length of the wires. Further, due to characteristics such as the material of the wire coating and the conductor structure inside the wire, the coefficient of friction and the weight change greatly, so as described above, errors in the length of the wire are likely to occur. Furthermore, depending on the reel-shaped packaging state of the electric wire, the outer diameter of the wire coating changes and the gripping position of the roller changes, which tends to cause errors.

Therefore, in order to accurately draw out (lengthwise extend) the electric wire by a desired length, some effort is required. In addition, in recent years, as electric vehicles and hybrid cars have become more popular, power wires for automobile wire harnesses have become thicker, and requirements for their length and dimensional accuracy have become increasingly strict.

The present invention aims to solve one or more of the following problems regarding thick electric wires.
a) Improved dimensional accuracy of wire length.
b) Automatically detects wire length abnormalities.
c) Prevent equipment abnormalities and detect product abnormalities when excessive wire pulling force is applied.

The electric wire draw-out length measuring device of the present invention is a device for pulling out an electric wire (W2) and measuring the length of the electric wire (W2), and includes a clamp (1701) that grips the tip portion (WT) of the electric wire (W2). , a drawing head (1705) for drawing out the electric wire, a head moving means (1770) for moving the head in the drawing direction, and a first length measuring means (1780, 1783) for measuring the moving length of the head (1705).・1790), a second length measuring means (2120/2125) that measures the drawn-out length of the electric wire (W2), and a length difference calculating means that calculates the difference between the length values of both length measuring means. (1798) and .

In the wire drawer length measuring device of the present invention, the first length measuring means includes a moving motor (1790) of the head moving means (1770) and an encoder (1795) that detects the amount of rotation thereof; The second length measuring means may include a length measuring roller (2120) that rotates while being pressed against the electric wire (W2), and a tachometer (2125) that detects the amount of rotation thereof.

If the electric wire W2 has more curvature than expected, the length measured by the second length measuring means may be considerably longer or shorter than the length measured by the first length measuring means. . At that time, the operator identifies it as an abnormality and takes measures such as adjusting the equipment. It is also preferable to display, notify, warn, and/or stop the device when the difference between the length measurement values of both length measurement means exceeds a standard.

One electric wire end processing device of the present invention includes: a wire feeding section (11) that feeds the electric wire (W1); a wire cutting section (15) that cuts the fed electric wire (W2); and the electric wire. A pull-out length measuring device, a clamp conveyance unit (21) that clamps the electric wire (W2) and conveys it horizontally in a direction intersecting the feeding direction of the electric wire, and an end treatment unit that processes the end of the cut electric wire. (23, 25, 27), and the second length measuring means is arranged in the clamp transport section (21).

Another wire end treatment device of the present invention includes a straightener (1110) for straightening the curl of the wire, a wire feeding section (11) for feeding the wire (W1), and a wire feeding section (11) for feeding the wire (W1); It is equipped with a wire cutting section (15) for cutting, and a pull-out head (1705) having a clamp (1701) for gripping the tip portion (WT) of the wire (W2) whose tip has been cut, and the wire (W2) can be cut as desired. The wire drawing length measuring part (17) includes a wire drawing length measuring part (17) for drawing out the length of the wire, and an end processing part (23, 25, 27) that processes the end of the cut wire, and the wire drawing length measuring part (17) A head moving means (1770) for moving the drawing head (1705) in the drawing direction, and a length measuring means (1780, 1783, 1790) for measuring the moving length of the head (1705), Sometimes, the wire between the straightener (1110) and the drawing head (1705) is tensioned.

In this wire end treatment device, tension can be applied to the wire between the straightener (1110) and the drawing head (1705), thereby suppressing slack such as bending of the wire. Therefore, there is almost no difference between the moving length of the drawing head (1705) and the length of the electric wire actually drawn out, and it is possible to draw out the electric wire of an accurate length.

Another electric wire drawing length measuring device of the present invention includes a clamp (1701) that grips the tip portion (WT) of the electric wire (W2), and a drawing head (1705) that pulls out the electric wire (W2); A head moving means (1770) for moving in the drawing direction, a length measuring means (1780, 1783, 1790) for measuring the moving length of the head, and a drawing force applied to the drawing head (1705) exceeding a predetermined value. and a retracting means (1716) for escaping the drawing head in a direction opposite to the drawing direction when the drawing head is pulled out.

The evacuation means may include an air cylinder (1716) and a regulating valve (1719) for the applied pressure. The air cylinder biases the head in the pull-out direction, and when the pull-out force becomes greater than the force of the air cylinder, the air cylinder moves in the opposite direction to release the head. Moreover, it is also possible to further include means (1723) for detecting the operation of the evacuation means (1716).

To pull out the wire, overcome the resistance of a straightener, etc. When the wire drawing resistance becomes excessive due to a reason such as the wire being too tightly wound, the head is released in the direction opposite to the drawing direction. The operator then checks the wires and equipment. Alternatively, if the wire is overloaded, the equipment will be stopped and a display or warning will be issued. Then, we will take measures such as inspecting the wire straightening section and the wire reel feeding device.

Another wire end processing device of the present invention includes: a wire feeding section (11) that feeds the wire (W1); a wire cutting section (15) that cuts the fed wire; and a wire with a cut end. a wire drawer length measuring unit (17) equipped with a pull-out head (1705) having a clamp (1701) that grips the tip portion (WT) of the wire (W2) and pulls out the wire (W2) to a desired length; A clamp conveyance unit (21) clamps the electric wire (W2) and conveys it horizontally in a direction intersecting the feeding direction of the electric wire, and an end treatment unit (23, 25, 27), and the clamp conveying section (21) has two pairs of clamp pieces (2101 and 2103) arranged in the front and back direction that grip the tip of the electric wire (W2), and the drawing head The clamp (1701) of (1705) grips the tip portion (WT) of the electric wire (W2) between the two pairs of clamp pieces (2101 and 2103) of the clamp conveying section (21). .

The two pairs of clamps arranged in the front-rear direction that grip the tip of the electric wire (W2) of the clamp conveyance unit (21) cut between the rear end of the leading electric wire and the tip of the trailing electric wire. In some cases, they are holding electrical wires. Thereafter, the clamp of the drawing head grips the top (WT) of the electric wire (W3) between the two pairs of clamps of the clamp conveyance section (21), and the clamp of the clamp conveyance section (21) releases the electric wire. After that, the drawing head pulls out the wire. The clamp of the pull-out head grasps and pulls out the electric wire in a stable state with no bends, which is held by the two pairs of clamps of the clamp conveyance section (21). Therefore, since the gripping position of the clamp of the drawing head is as planned, the length accuracy of the electric wire can be maintained at a high level.

In FIGS. 13 to 16, the meanings of the symbols of electric wires are as follows. The “electric wire W1” is a portion from the tip of the reel WL to the tip clamp conveyance section 21. “Electric wire W2” is a portion whose tip is cut off, and when its rear end is cut next, it becomes the next electric wire W3. “Electric wire W3” is an electric wire with both ends cut off. “Electric wire W” is a general term for the electric wire, including each part of the electric wire.

The overall configuration of the wire feeding/drawing length measuring device 1000 will be described with reference to FIG. 13. The electric wire W is set in the form of a wound reel (wire reel WL) on the reel support 10 on the original side of the device. Reel support 10 rotatably holds the core of reel WL. A wire feeding section 11 is provided at the end of the reel WL. The wire feeding section 11 includes a straightener 1110. The straightener 1110 is of a well-known type and has a plurality of rollers 1111, 1113, 1115, and 1117 that sandwich the electric wire W1 vertically and horizontally, and corrects curls in the electric wire.

A tip clamp conveying section 21 is provided on the tip side of the straightener 1110. For the overall operation and structure of the forward clamp conveying section 21, please refer to FIGS. 1, 6, and 10 and their explanations. Two clamp pieces 2103 and 2101 are arranged at a certain interval in the front-back direction in the front-clamp conveying section 21 of this embodiment. The clamp piece grips the electric wire W2.

A wire cutting section 15 is arranged on the front side of the tip clamp conveying section 21. The part 15 has a blade 1501 that cuts the electric wire. Note that the wire cutting section 15 is lowered except when cutting the wire, so as to avoid unnecessary contact between the blade 1501 and the wire W2.

A wire pullout length measuring device 17 is provided above the tip clamp conveying section 21 and the wire cutting section 15. The device 17 includes a pull-out head 1705 that has a clamp 1701 that grips the tip portion WT of the electric wire W2 and pulls out the electric wire, and a head moving means 1770 that moves the head in the pull-out direction (see FIG. 14(C)). The pull-out head 1705 receives the tip portion of the electric wire W2 from the clamp pieces 2103 and 2101 of the tip-clamp conveying section 21, and pulls out the electric wire to a desired length toward the tip side. The details will be described later with reference to FIG. 14.

A rear clamp transport section 31 is provided on the forward side of the cutting section 15. The clamp piece 3101 of the same portion 31 grips the front end portions of the electric wires W2 and W3. Note that when the cutting section 15 cuts the electric wire W2, both the front clamp conveyance section 21 and the rear clamp conveyance section 31 are in a state of holding the electric wire W2. For the overall operation of the rear clamp conveyor 31, please refer to FIG. 1 and its description.

Next, with reference to FIG. 14, a wire drawing length measuring device 1000 including first length measuring means 1780, 1783, 1790 for measuring the length of electric wire W and second length measuring means 2120, 2125 will be explained. . As shown in FIGS. 14(A) and 14(C), this device 1000 is mainly composed of a tip clamp conveying section 21 and a wire pullout length measuring device 17. In addition, as shown in FIG. 13, the electric wire draw-out length measuring device 17 of FIG. 14(C) is arranged above and on the front side of the tip clamp conveying section 21 of FIG. 14(A).

The end clamp conveyance section 21 includes a wire guide vertical roller 2145, a wire guide horizontal roller 2141, a wire passing tunnel 2130, an auxiliary length measuring roller 2120, and a pair of clamp pieces from the base side (upstream side) to the tip side (downstream side) of the wire. It has 2103, 2101, etc. The wire guide rollers 2145 and 2141 and the wire passing tunnel 2130 are used to prevent the wire W2 from shifting during horizontal conveyance during the crimping process, etc., and to clamp the wire W1 straight from the straightener 1110 (Fig. 13) in the front and back and up and down directions. It leads to the transport section 21.

The auxiliary length measuring roller 2120 consists of a pair (two sets) of opposing rollers 2120 and 2120', as shown in FIG. 14(B). Each roller is rotatable around a vertical axis. Above the rollers 2120 and 2120', an air cylinder 2123 is provided that is driven to narrow and widen the distance between the rollers. The rollers 2120 and 2120' are pressed against the side surface of the electric wire W2 by the air cylinder 2123, and rotate at the same speed due to friction as the electric wire W2 moves.

The shaft of one roller 2120 extends upward and is connected to an encoder 2125. These length measuring rollers 2120, 2120', encoder 2125, and the like constitute a second length measuring means that measures the length of the electric wire W2 drawn out. Note that the rotation of the encoder 2125 is in a semi-restricted state due to the wire gripping force of the clamps 2101 and 2103 and the pressing force of the cylinder 2123. Regarding length measurement, since the length is measured using the incremental function of the encoder, there is no problem even in a semi-restricted state.

The wire drawer length measuring section 17 includes a drawer head 1705 that grips and pulls out the wire W2, a head moving rail 1771, a moving belt 1780, a moving motor 1790, and the like. The drawing head 1705 has a clamp 1701 at its lower part that grips the tip portion WT of the electric wire W2. The clamp 1701 is driven to open and close by an opening/closing mechanism (such as an air cylinder, built in the head 1705) thereon. The drawing head 1705 is supported by a moving rail 1771 so as to be slidable in the front and rear directions via an escape slide 1710 (described later with reference to FIG. 16) and a moving table 1731.

The moving table 1731 is driven to run in the front-back direction by a timing belt 1780. A driving pulley 1783 and a driven pulley 1784 are engaged before and after the timing belt 1780. The drive pulley 1783 is rotationally driven by a head travel motor 1790. The motor 1790 is a servo motor with a built-in encoder. The encoder-equipped motor 1790 constitutes a first length measuring means for measuring the moving length of the head 1705.

Next, with reference to the block diagram of FIG. 15, the configuration of the measurement system of the wire pull-out length measuring device shown in FIG. 14 will be described. In the upper left of this figure, a movement motor 1790 of the drawing head and an encoder 1795 built into the motor are shown. At the bottom left of the figure, a length measuring roller 2120 that rotates while being pressed against the wire being pulled out, and an encoder 2125 that detects the rotation are shown. The rotation signals of the motor encoder 1795 and the roller encoder 2125 are sent to electric wire length difference calculation means 1798 (consisting of a device such as a microcomputer). The electric wire length difference calculation means 1798 converts the signals from both encoders into two types of electric wire draw-out lengths, and calculates the difference between the two.

If the electric wire W2 is curved more than expected, the rotational length of the length measuring roller 2120 (the length measured by the second length measuring means) is longer than the traveling length of the pull-out head 1705 (the length measured by the first length measuring means). (measured length) may be longer. Alternatively, the second length measuring means may be considerably shorter. At that time, the operator identifies it as an abnormality and takes measures such as adjusting the equipment.
Furthermore, if the difference between the length measurement values of both length measurement means exceeds a standard, display, notification, alarm, and/or device stoppage can be performed via the operation panel 1799.

Next, the two pairs of clamp pieces 2101 and 2103 of the front clamp transport section 21 shown in FIGS. 14 and 13 will be explained. The clamp pieces are provided at slight intervals in the front-rear direction of the electric wire. Then, when passing the electric wire W2 from the front clamp conveyance unit 21 to the drawing head 1705, as shown in FIG. 14, the clamp 1701 of the head grips the top WT of the electric wire W2 between the two pairs of clamps. .

The front clamp piece 2101 has a structure in which the clamp 2101 descends downward so as not to interfere with the forward-moving draw-out clamp 1701 when drawing out the electric wire.

When cutting the boundary between the rear end of the leading wire (the part whose front and rear ends are cut first) and the tip of the trailing wire (the part whose front and rear ends are cut next), the clamp conveyor 21 The two pairs of clamp pieces 2101 and 2103 grip the electric wire. After cutting the electric wire, the clamp 1701 of the drawing head 1705 grips the electric wire W2 between the two pairs of clamp pieces of the clamp conveyance section 21, and the clamp of the clamp conveyance section 21 releases the electric wire. After that, the drawing head 1705 draws out the electric wire.

In this way, when the pull-out head 1705 receives the electric wire W2, the electric wire W2 is held by the two pairs of clamp pieces 2101 and 2103 of the clamp conveyance section 21, and is in a stable posture without bending. . Therefore, the gripping position of the pull-out clamp becomes a predetermined position as planned, which also leads to maintaining high accuracy in the length of the electric wire.

Next, referring to FIG. 16, a drawing head retracting means in the wire drawing length measuring device according to the embodiment of the present invention will be described. A withdrawal head 1705 with a withdrawal clamp 1701 is mounted on an overload relief slide 1710. The slide stand 1710 is mounted on a moving table 1731 so as to be movable in the front and back direction along an overload relief rail 1711.

The escape slide table 1710 is urged forward with respect to the moving table 1731 by an air cylinder 1716. That is, air cylinder 1716 is fixed to moving table 1731, and rod 1717 of the cylinder is connected to slide base 1710. An air pipe 1720 is connected to the rod side portion of the air cylinder 1716. A pressure regulating valve 1719 is attached to the air piping 1720, and air at a pressure regulated by this valve 1719 is applied to the chamber 1716b on the rod side of the cylinder 1716 and the rear surface 1718c of the piston 1718 in the cylinder. ing.

In the normal state described below, the rod 1717 and the piston 1718 are in a state closer to the front side, as shown in FIG. A magnetic sensor 1723 is arranged on the front side of the outer surface of the cylinder 1718. This sensor 1723 determines the position of the piston 1718. In the event of an abnormality described below, the piston 1718 moves relatively to the rear side, and the sensor 1723 detects this.

The biasing force of the cylinder 1716 is higher than the maximum pulling force of the normal electric wire, which is caused by the resistance of the straightener 1110 (FIG. 13) and the resistance of the normal electric wire. That is, normally, the escape slide 1710, the pull-out head 1705, and the clamp 1701 move in synchronization with the movement of the moving table 1731, and the electric wire can be pulled out.

On the other hand, due to abnormal situations such as when the winding of the wire is too strong and the resistance becomes excessive, or when a wire transfer problem occurs such as a failure of the reel support (wire supply device) 10, the pulling force applied to the drawing head 1705 may be reduced to a predetermined level. When the value exceeds the value, the rod 1717 is pulled out from the air cylinder 1716, and the escape slide table 1710 and the pull-out head 1705 are evacuated (escaped) in the direction opposite to the pull-out side (backward). Then, the magnetic sensor 1723 described above detects this and notifies the operator with an alarm or the like to prompt confirmation. The operator then checks the wires and equipment and takes measures such as removing the cause of overload on the wires. This makes it possible to prevent defects from occurring due to device failure or abnormality in electric wires.

The electric wire rotating portion between the two terminal crimping machines of the terminal crimping electric wire manufacturing apparatus according to the present embodiment will be explained.
In thick electric wires, the degree of freedom in twisting (twisting) the wire itself is low, and the gravity per unit length of the wire is heavy, so after crimping the terminals to both ends of the wire, the mutual angle between the terminals at both ends (the longitudinal axis of the wire) The degree of freedom to adjust (change the angle) by twisting the wire (surroundings) may be low. BACKGROUND ART In recent years, with the spread of electric vehicles and hybrids, power wires for automobile wire harnesses have become thicker, and demands on the accuracy of the terminal angles at both ends have become increasingly strict.

As a document that discloses a means for rotating an electric wire around an axis in a terminal crimped electric wire, there is JP-A No. 2009-152104 (Patent Document 11, Sumitomo Wiring Systems). 3 and 4 and specification paragraphs 0053 to 57 of this document, the electric wire end rotating portion 33 is disclosed. However, the electric wire end rotation part 33 of this document 11 is for adjusting the angle when hanging the electric wire with terminals crimped on both ends on the electric wire holding bar 10 which is a wire storage jig, This is an intermediate stage of crimping and does not involve twisting the entire wire. In other words, it does not address the problem of adjusting (changing the angle) the angle between the terminals at both ends (around the longitudinal axis of the wire) by twisting the wire.

Similarly, as a document disclosing a means for rotating an electric wire around an axis in a terminal crimped electric wire, there is JP-A No. 2008-10375 (Patent Document 12, Japan Automatic Machine). Figures 1, 2, and 3 and paragraphs 0036 to 42 of the specification of this document show a wire rotation mechanism 80A that rotates the end of the wire with the terminal crimped, and a wire rotation mechanism 80A that rotates the end of the wire with the terminal not crimped. A wire harness manufacturing device having a rotation mechanism 80B is disclosed. However, the electric wire rotation mechanism of Document 12 grips only the rear end of the electric wire to which the terminal T is crimped; It doesn't twist the whole thing. Therefore, a wire rotation mechanism is required at each end of the wire.

Further, as a document disclosing a means for rotating an electric wire around an axis in a terminal crimped electric wire, there is Patent No. 5048885 (Patent Document 13, Japan Automatic Machine). FIG. 4 of this document discloses means 10 for adjusting the angle of the terminal around the wire axis direction. However, the angle adjustment means 10 of this document 13 is for adjusting the angle when inserting an electric wire with terminals crimped at both ends into a connector housing, and the angle adjustment means 10 is for adjusting the angle when inserting the electric wire with terminals already crimped at both ends into the connector housing. It is not meant to twist. In other words, it does not address the problem of adjusting (changing the angle) the angle between the terminals at both ends (around the longitudinal axis of the wire) by twisting the wire.

Patent Document 11; Japanese Patent Application Publication No. 2009-152104 Patent Document 12; Japanese Patent Application Publication No. 2008-10375 Patent Document 13; Japanese Patent No. 5048885

The present invention aims to solve one or more of the following problems regarding thick electric wires.
a) It improves work efficiency without interfering with the process after terminal crimping.
b) The angle of heavy and thick electric wires can be adjusted accurately in a short time.

The electric wire double-end terminal crimping device of the present invention includes: a wire feeding section (11) that feeds the electric wire (W1); a wire cutting section (15) that cuts the fed electric wire to an arbitrary length; and the electric wire. (W2/W3); a tip coating peeling part (23) that peels off the coating on the tip of the electric wire (W2/W3); a tip terminal crimping part (27) that crimps a terminal to the tip from which the coating has been stripped; and the electric wire (W2/W3). a rear end sheath stripping section (33) that strips the sheath from the end of the wire; a rear end terminal crimping section (37) that crimp a terminal to the end of the wire from which the sheath has been stripped; and a rear end terminal crimping section (37) that clamps the wire and transports it to each section. An electric wire having a terminal T crimped at its tip, comprising a clamp conveying section (21, 31), and further provided between the tip terminal crimping section (27) and the rear terminal crimping section (37). By grasping and rotating only the rear end, the entire electric wire (W3) can be rotated at a desired angle around the longitudinal axis of the electric wire, without restricting rotation of the tip with the terminal crimped. It is characterized by comprising an electric wire rotation part (32) that rotates the electric wire.

In the present invention, the electric wire axial rotation process is installed as a treatment process for the rear side (tail side) of the electric wire, and after performing the desired electric wire axial rotation on the front side (top side) of the electric wire, the rear side ( (tail side) terminal crimping can be performed. When assembling crimped wires in the next process after terminal crimping (inserting a housing, etc.), it is difficult to twist thick wires and the crimped terminals cannot be held in a free position. By rotating and crimping, work efficiency in the next process will be improved.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An electric wire both-end terminal crimping device according to an embodiment of the present invention will be described below with reference to the drawings.
FIG. 17 is a perspective view showing the general configuration and operation of the wire rotating section 32 of the wire both-end terminal crimping device according to the embodiment of the present invention. (A) shows the state in which the base part WB of the wire W3 is inserted into the clamp 3201 of the wire rotation part 32, (B) shows the state in which the rotation clamp 3201 is closed and the wire base part WB is gripped, and (C) ) is a state in which the electric wire W3 has been rotated 90° counterclockwise, and (D) is a state in which the rotating clamp 3201 is opened and the electric wire W3 is deposited on the rear clamp conveyance section 31.
FIG. 18 is a diagram showing a specific structure of the electric wire rotating section 32 of FIG. 17, in which (A) is a side view and (B) is a front view.

The electric wire rotation unit 32 includes a clamp 3201 that grips the base portion WB of the electric wire W3, an opening/closing mechanism 3203 thereof, and a rotation motor 3227. In FIG. 17(A), the portion of the electric wire W3 closer to the base WB is held by the clamp 3101 of the rear end clamp conveyance section 31. A terminal T1 is crimped to the tip WT of the electric wire W3, and the tip of the terminal T1 lies on the right side in the figure. The base portion WB of the electric wire W3 is inserted into the clamp 3201 of the electric wire rotating section 32 in an open state.

FIG. 17(B) shows a state in which the rotating clamp 3201 is closed and the wire base portion WB is gripped. Then, the transport clamp 3101 is slightly opened. Here, the tip WT of the electric wire W3 is lying on the stand 3102 of the rear clamp conveyance section 31, and there is nothing to clamp, hold, restrain, or rotate it. From here, as shown in FIG. 17(C), the rotating clamp 3201 is rotated 90 degrees counterclockwise to rotate the electric wire W3. At this time, the tip of the tip T1 of the electric wire W3 rises upward. In this manner, in the electric wire rotation unit 32 of this embodiment, only the rear end portion of the electric wire is held and the tip portion to which the terminal is crimped is twisted in a state where the rotation is not restricted.

Subsequently, as shown in (D), the transport clamp 3101 is closed and the rotation clamp 3201 is opened. Thereafter, the rear end clamp conveyance section 31 conveys the electric wire W3 to the rear coating stripping section 33 (see FIG. 1).

The specific structure of the wire rotating section 32 of this embodiment will be described with reference to FIG. 18. The rotating clamp 3201 has clamp pieces 3201b and 3201c that are open up and down in FIG. 18. Each clamp piece has a shallow V-shaped peak 3201g, as shown in FIG. 18(B). As shown in FIG. 18(A), the peaks 3201g have a thin plate shape when viewed from the side, and are provided in multiple rows. There is a groove-shaped valley 3201j between the adjacent mountains 3201g.

When the rotation clamp 3201 is closed, the heads of the peaks 3201g (pointed parts of the left and right triangles when viewed from the front) enter the valleys 3201j. In this example, three peaks 3201g are provided on the upper clamp piece 3201b, and four peaks are provided on the lower clamp piece 3201c. With such a structure including a plurality of peaks and valleys, it is possible to firmly grip the electric wire W3.

A clamp opening/closing mechanism 3203 consisting of an air cylinder or the like is provided on the base side of the clamp 3201. A rotating barrel 3207 is connected to the base side of the clamp opening/closing mechanism 3203. The rotating barrel 3207 is rotatably held relative to the frame 3211. A large pulley 3221 is attached to the base end of the rotating barrel 3207. A timing belt 3223 is wound around the outer circumference of the large pulley 3221.

This timing belt 3223 is wound around the outer periphery of a small pulley 3225 located below. This small pulley 3225 is attached to the shaft end of a rotary motor 3227 with a reduction gear. This rotation motor 3227 is a servo motor and can stand still at an accurate rotational position and angle. This allows the thick electric wire to be rotated and angled accurately by gripping only the rear end.

A terminal crimping machine of a terminal crimping electric wire manufacturing apparatus according to the present embodiment will be described. A terminal crimping machine for thick electric wires (for example, stranded wire cross-sectional area of 8 to 20 sqmm ² ) for automobile wiring harnesses is required to have a large crimping force of about 70 KN or more. In recent years, as electric vehicles and hybrid vehicles have become more popular, power cables for automobile wiring harnesses have become thicker. In addition, requirements regarding the precision of the terminal crimping shape are becoming increasingly strict. Therefore, the conventionally common cantilevered crimping machine frame may lack rigidity.

Utility Model Registration Publication No. 2513288 (Patent Document 51) discloses a servo press in which an upper mold 1 is supported by left and right posts (elevating frames 9). The servo press of Patent Document 51 has a ball screw shaft 6 and a threaded part 8 disposed at the core of a servo motor 4, and rotates the motor 4 and threaded part 8 to rotate the ball screw shaft 6 and the lifting frame. 9. This is for raising and lowering the upper mold 1. A direct drive servo motor with such a hollow structure is a custom-made product and is therefore extremely expensive.

Furthermore, in the servo press of Patent Document 51, the motor 4 is arranged between the left and right posts (elevating frame 9), and the threaded part 8 that moves the ball screw shaft 6 up and down is directly driven by the motor 4. . Therefore, a motor with high output torque commensurate with the required thrust is required. For example, if a motor with a shaft torque of about 300 N·m is used, its outer diameter will be φ350 to φ450 mm, resulting in a wide distance between the posts.

The disadvantages when the distance between posts becomes wider are as follows.
(a) Depending on the size of the ram holder (see numeral 2731 in Figures 19 and 20, also referred to as the "slide"), the applicator mount (see numeral 2741 in Figures 19 and 20, also referred to as the "bed surface") The accuracy of parallelism etc. with
(b) Depending on the location of the concentrated load, deflection will occur depending on the size and rigidity of the slide, making the process dependent on the rigidity of the mold (applicator) used, which may shorten the life of the mold.
In addition, in the servo press of Patent Document 51, since the motor is disposed at the lower part between the left and right posts, there is also a problem that maintainability is poor in the event of motor failure.

An object of the present invention is to solve one or more of the following problems regarding a servo press and a terminal crimping machine for thick electric wires.
a) Standard and small motors can be used.
b) There are many options for combinations of motors and reduction mechanisms.
C) The distance between the posts will not be unnecessarily wide, and the accuracy of the parallelism between the slide and the bed surface, etc., and the deflection when applying a concentrated load will be in accordance with the size and rigidity of the slide.
e) The applicator is easy to replace and install.

The servo press of the present invention includes: an upper mold (2711) that is a movable tool; a lower mold (2721) that is a fixed tool that faces the upper mold; and an upper mold drive means that drives the upper mold (2711). A press (2700) comprising: a feed nut (2771) for linearly driving the upper die; a feed screw (2781) threadedly engaged with the feed nut; and a rotation of the feed screw. A motor (2794) that is a drive source and rotates around an axis offset from the rotation 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). ).

The terminal crimping machine (2700) of the present invention includes a crimper (2711) which is a movable tool for crimping a terminal (T) to the end of an electric wire (W), and an anvil (2721) which is a fixed tool that faces the crimper. A terminal crimping machine (2700) comprising: a crimper driving means for driving the crimper (2711), a feed nut (2771) for linearly driving the crimper, and a screw between the feed nut and the screw. a feed screw (2781) that is matched with the feed screw; a motor (2794) that is a rotational drive source for the feed screw and rotates around an axis that is offset from the rotational axis of the feed screw; (2781) and a rotation transmission mechanism (2757, 2754, 2751).

A specific form of the servo press or terminal crimping machine of the present invention includes: a ram (2701) that drives the crimper or upper die (2711), a ram holder (2731) that holds the ram, and the feed nut (2771). A nut holder (2767) that holds the ram holder (2731), and each of the left and right sides (2731h/m) of the ram holder (2731), and each of the left and right sides (2767h/m) of the nut holder (2767) are connected to each other. An applicator pedestal or mold pedestal on which two tie rods (2734L/R) and the anvil or lower die (2721) are mounted, and the tie rods (guide rods, 2734) pass through the left and right sides (2741h/m) of the anvil or lower die (2721). (2741), and rod guide portions (2745L/R) fixed to the left and right sides (2741h/m) of the mount.

Place the motor (2794) next to the screw (2781) and transmit rotation to the screw using a rotation transmission mechanism such as a belt (2754). Therefore, there is no need to place the motor (2794) between the two posts (tie rods (2734)), and the distance between the posts can be narrowed. Therefore, the dimensions and deflection of the ram holder (2731, slide), the applicator stand or the mold stand (2741, bed surface) are reduced, and the shape accuracy of the crimp terminal is improved.

In addition, you can choose from a wide range of motors with common shapes and specifications (torque, rotation speed, reduction gear included). Furthermore, since the screw (2781) can be configured to rotate and not move up and down, the height of the device can be reduced.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A terminal crimping machine according to an embodiment of the present invention will be described below with reference to the drawings.
FIG. 19 is a side view of a crimping machine 2700 according to an embodiment of the present invention, and FIG. 20 is a front view thereof. This crimping machine 2700 is for crimping a terminal T onto the tip of an electric wire W whose coating has been partially peeled off. The crimping machine 2700 has a crimper 2711, which is a movable tool for crimping the terminal T, and an anvil 2721, which is a fixed tool that faces the crimper.

Anvil 2721 is placed on anvil holder 2724. The holder 2724 is placed on the applicator mounting base 2737 via the applicator base 2727. Note that the anvil 2721, the crimper 2711, and the terminal T feeding mechanism 2715 are assembled into an applicator AP for each type and size of the terminal. When changing the type or size of the terminal, replace the entire applicator AP.

Crimper 2711 is secured to shank 2707 above it. The shank 2707 is engaged with and suspended from the ram bolt 2703. Ram bolt 2703 projects from the underside of ram 2701 above it. The shank 2707 is part of the applicator AP, and the ram bolt 2703 and ram 2701 are part of the body of the crimping machine (press).

The ram 2701 is block-shaped and is provided at the center of the lower surface of the ram holder (upper tie bar) 2731 so as to protrude downward. The ram holder 2731 is a thick band-shaped member extending left and right. Two tie rods 2734L and 2734R (post, guide rod) hanging downward are fixed to the left and right sides 2731h and m of the ram holder 2731.

The tie rods 2734L/R extend downward from both outside sides of the applicator AP, pass through the guide part 2745, and extend further downward to reach the left and right sides 2767h/m of the nut holder (lower tie bar) 2767, and their lower ends Fixed. In this crimping machine 2700, an upper and lower ram holder (upper tie bar) 2731, a nut holder (lower tie bar) 2767, and left and right guide (tie) rods 2734L and R constitute a rectangular frame. This frame is then driven up and down, and the ram 2701 and crimper 2711 are moved up and down.

The rod guide portion 2745 has an upper portion fixed to the applicator frame 2741 and a lower portion fixed to the bearing holder 2761. The applicator stand 2741 is a stand on which the applicator AP is mounted. The bearing holder 2761 is a thick band-shaped member that supports a bearing box 2764 that includes a bearing (not shown) that rotatably supports a feed screw 2781, which will be described later. These left and right rod guide portions 2745LR, applicator pedestal 2741, and bearing holder 2761 are themselves strong structures, and are firmly fixed to a support pedestal (not shown).

A bush 2735 that guides the guide rod 2734 in a vertically slidable manner is disposed within the guide portion 2745.

The nut holder 2767 is a thick band-shaped member that supports a nut box 2771 that includes a feed nut (ball nut) that is screwed into a feed screw 2781, which will be described later.

The feed screw 2781 is a ball screw shaft that extends vertically. A driven pulley 2751 is fixed to the upper end of the feed screw 2781. The above-mentioned bearing box 2764 is arranged below the driven pulley 2751, and the bearing therein rotatably supports the feed screw 2781. The above-mentioned nut box 2771 is arranged below the bearing box 2764, and the ball nut therein is screwed into the feed screw 2781.

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

A belt 2754 is engaged with the outer periphery of the driven pulley 2751. A belt 2754 extends rearward in FIG. 19 and engages the outer periphery of drive pulley 2757. Drive pulley 2757 is fixed to the shaft of motor reducer 2791. An integrated servo motor 2794 is provided below the motor reducer 2791. This motor/reducer is firmly fixed to a support frame (not shown).

In the crimping machine 2700 of this embodiment, as shown in FIG. 20, a bearing box 2764 that rotatably holds the feed screw 2781 is located on the opposite side of the applicator frame 2741 with the left and right rod guide parts 2745L and 2745R in between. , and a bearing holder 2761 are provided. A window 2750 is opened between the left and right rod guide parts 2745L and 2745R, and between the upper and lower applicator stands 2741 and the bearing holder 2761. The above-mentioned driven pulley 2751 is arranged within this window 2750. With this structure, the height of the entire crimping machine is reduced while the rod guide portion 2745 is lengthened to prevent the rod 2734 from falling.

Another form of terminal crimping machine 2800 will be described with reference to FIGS. 21 and 22.
FIG. 21 is a side view of a terminal crimping machine 2800 with an improved applicator exchange function, and FIG. 22 is a plan view. The front (front) and back (original) directions and left and right directions in FIG. 22 correspond to the directions of the tip crimping portion 27 in FIG. 1.

This terminal crimping machine 2800 is an application equipped with a crimper (2711, see Figures 19 and 42), an anvil (2721), and a terminal feeding mechanism (2715) for crimping a terminal (T) onto the end of an electric wire (W). a crimper drive means for driving the crimper (2711), and an applicator stand (2741) on which the applicator (AP) is mounted, and on the upper surface of the applicator stand (2741). A slide rail (2739) is provided for slidingly guiding the applicator (APS) between the operating position (2741x) and the standby position (2823y) of the applicator.

Prepare the applicator to be used next on the slide rail (2739/2871) or table (2823), pull out the applicator you have used so far onto the same slide rail or table, and then insert the applicator to be used next. can be set on the crimping machine. Therefore, the time during which the crimping machine is stopped is shortened, and the operating rate of the crimping machine is increased.

The operating position (2741x) of the applicator is a position where the applicator (AP) is under the ram 2701 (see FIG. 20) of the crimping machine main body and crimps the terminal T to the end of the electric wire W. The applicator standby position (2823y/2871y) is a position outside the crimping machine that does not interfere with crimping work, and is where the applicator that will be installed next in the crimping machine (or taken out from the crimping machine) will wait. This is the position where

This type of terminal crimping machine (2800) has a slide rail (2739/2871) that slides and guides the applicator (AP) between the operating position (2741x) and the standby position (2823y/2871y) of the applicator. The applicator is easy to take out and install. Further, the applicator replacement work can be done in a short time.

In the crimping machine (2800) of the present invention, it is preferable to provide two types of slide rails (2739 and 2871), one for side feed and one for end feed. Compatible with any type of applicator. "Side feed" is a method in which a strip-shaped terminal row with many terminals lined up is fed from the side of the crimping machine body (in a direction that intersects the wire insertion direction), and "end feed" is a method in which a strip-shaped terminal row in which many terminals are lined up is fed from the side of the crimping machine body (in a direction that intersects the wire insertion direction). This is a method of feeding from the vertical direction (direction along the wire insertion direction). When the crimping machine main body is a two-post type shown in FIG. 20, the slide rails (2739 and 2871) may extend in a direction diagonally intersecting a line connecting the centers of the two posts.

In FIG. 21, the side feed applicator APS is shown in the operating position 2741x on the left side of the figure, and the side feed applicator APS' in the standby position 2823y is shown on the right side of the figure. Applicator APS in working position 2741x rests via its applicator base 2727 on slide rail 2739 on applicator pedestal 2741. On the other hand, the applicator APS' at the standby position 2823y is placed on a slide rail (side table) 2823 on a pedestal 2831 via its applicator base 2727.

Rail grooves 2739b and 2823b are carved into the upper surfaces of the slide rail 2739 on the operating position 2741x side and the slide rail (side table) 2823 on the standby position 2823y side so as to extend in the left-right direction. The applicator APS can be slid along these rail grooves 2739b and 2823b (slide by pushing it by hand).

As shown in FIG. 21, the applicator base 2727 in the operating position 2741x is fixed at its left and right ends by base fixing claws 2742 and 2743. The surfaces 2742b and 2743b of each of the fixed claws 2742 and 2743 on the side of the applicator base 2727 are sloped surfaces that move inward toward the top. Thereby, both fixed claws 2742 and 2743 form a dovetail groove between them. Note that the left and right end surfaces of the applicator base 2727 are sloped surfaces that fit into the dovetail grooves.

The fixing claw 2742 on the left side is firmly fixed to the applicator frame 2741 and the slide rail 2739. When the base 2727 of the replaced applicator enters the operating position 2741x, the base 2727 hits the left fixing claw 2742 and stops. The fixing claw 2743 on the right side is removable and attachable. Alternatively, it can be fixed, released from fixation, and retreated using a known lever mechanism or actuator. When moving the applicator APS into and out of the operating position 2741x, the right fixing claw 2743 is released and retracted.

The slide rail 2823 at the standby position 2823y is provided as a wide table 2823, as shown in FIG. The table 2823 is slidable in the front-back direction on a rail 2821 drawn on the pedestal 2831 in the front-back direction. A plurality of applicators APS1 and APS2 can be set on the same table 2823.

A rail groove 2823b is formed on the top surface of the side table 2823 so as to extend in the left-right direction. The rail groove 2823b of the table 2823 has the same width and depth as the rail groove 2739b of the slide rail 2739 on the applicator stand 2741, and both grooves 2823b and 2739b are connected in a straight line at the same longitudinal position. It is. In this state, the applicator APS can slide along both grooves 2823b and 2739b.

In the state of FIG. 22, the front applicator APS2 is in a position continuous with the operating position 2741x. This applicator APS2 has been pulled out from the operating position 2741x, or is set to the operating position 2741x from now on. The rear applicator AP1 is either the one that was pulled out from the operating position 2741x and then released by sliding the table 2823 to the rear, or the one that is about to be set in the operating position 2741x after sliding the table 2823 to the front. It is.

Next, we will explain how to replace the end feed applicator APE.
The end feed applicator APE in the standby position 2871y is shown in the upper right part of FIG. 22. The applicator APE at the standby position 2871y is placed on a slide rail 2871 extending in the front-rear direction. A rail groove 2871b is carved into the upper surface of the slide rail 2771 so as to extend in the front-rear direction. The applicator APE can be slid along this rail groove 2871b (by pushing and sliding by hand).

The rear end 2871t of the end feed slide rail 2871 extends to a position close to the side surface 2739t of the operating position 2741x at the right end of the side feed slide rail 2739. At the operating position 2741x, an end feed rail groove 2739c extending in the front-rear direction is formed orthogonally to the side feed rail groove 2739b. The end feed rail grooves 2739c of both rails and the aforementioned rail groove 2871b are formed to pass in a straight line. Moreover, the heights of both slide rails 2871 and 2739 and rail grooves 2871b and 2739c are the same.

With such a structure of the slide rails 2871 and 2739, the end feed applicator APE can slide between the operating position 2741x in the center of the crimping machine body and the standby position 2871y away from the same part. Therefore, the applicator APE that has been taken out from the operating position 2741x and slid to the standby position 2871y can be removed using a crane or the like at the standby position 2871y. If the side feed applicator APS is to be used next, slide the end feed applicator APE from the operating position 2741x, then immediately set the side feed applicator APS to the operating position 2741x. You can then resume terminal crimping work.

Claims (5)

A crimper (2711), which is a movable tool that crimps the terminal (T) to the end of the wire (W),
an anvil (2721) that is a fixed tool facing the crimper;
Crimper driving means for driving the crimper (2711);
A terminal crimping machine (2700) comprising:
The crimper driving means,
a feed nut (2771) that linearly drives the crimper;
a feed screw (2781) screwed into the feed nut;
a motor (2794) that is a rotational drive source for the feed screw and rotates around an axis that is offset from the rotational axis of the feed screw;
a rotation transmission mechanism (2757, 2754, 2751) that transmits the rotation of the motor to the feed screw (2781);
a ram (2701) that drives the crimper (2711);
a ram holder (2731) that holds the ram;
a nut holder (2767) that holds the feed nut (2771);
Two tie rods (guide rods, 2734L/ R) and
an applicator pedestal (2741) on which the anvil (2721) is mounted, and the tie rod (guide rod, 2734) passes through both left and right sides (2741h m) of the anvil (2721);
a rod guide part (2745L/R) fixed to the left and right sides (2741h/m) of the mount;
Equipped with
The rotation transmission mechanism is
a drive pulley (2757) rotationally driven by the motor (2794);
a driven pulley (2751) that rotationally drives the feed screw (2781);
A belt (2754) connecting both pulleys,
Equipped with
A bearing (2764) that rotatably holds the feed screw (2781) and a bearing holder (2761) are provided on the opposite side of the applicator frame (2741) across the rod guide portion (2745L/R). It is provided,
A window (2750) is open between the rod guide part (2745L/R), the applicator stand (2741), and the bearing holder (2761),
The driven pulley (2751) is arranged in the window,
Furthermore, it is equipped with a crimper (2711) and an anvil (2721) for crimping the terminal (T) to the end of the electric wire (W), and an applicator (AP) equipped with a terminal feeding mechanism (2715),
The applicator stand (2741) is provided with slide rails (2739 and 2823) that slide and guide the applicator (AP) between the operating position (2741x) and the standby position (2823y) of the applicator. A terminal crimping machine (2800) characterized by: The terminal according to claim 1 , wherein the standby position (2823y) is provided on a slideable side table (2823), and a plurality of applicators (AP) can be set on the table. Crimping machine (2800). There are two types of slide rails (2739 and 2871), one for side feed and one for end feed.
3. The slide rail (2739, 2871) extends in a direction diagonally intersecting a line connecting the centers of the two posts (2734L, R ) . Terminal crimping machine (2800). a wire feeding section (11) that feeds the wire (W1);
a wire cutting section (15) that cuts the fed wire to an arbitrary length;
Wire coating stripping parts (23, 33) for stripping the coating on the ends of the electric wires (W2, W3);
a terminal crimping part (27, 37) for crimping a terminal to the end of the wire from which the coating has been stripped;
A terminal crimping electric wire manufacturing device comprising: a clamp conveyance section (21, 31) that clamps an electric wire and conveys it to each section,
A terminal crimping electric wire manufacturing apparatus, wherein the terminal crimping section (27, 37) is a terminal crimping machine according to claim 1, 2, or 3 . a step of feeding the electric wire; a step of cutting the fed electric wire to a desired length; a sheathing stripping step of peeling off the coating at the end of the electric wire; and a terminal at the end of the electric wire from which the sheathing has been peeled off. A terminal crimping electric wire manufacturing method comprising: a terminal crimping step of crimping a terminal crimping electric wire; and a terminal crimping electric wire manufacturing method using the terminal crimping electric wire manufacturing apparatus according to claim 4 .

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