JPH0721977B2 - Electric wire terminal automatic processing method and apparatus - Google Patents

Description

The present invention relates to an electric wire terminal automatic processing method and apparatus.

(Prior Art) This type of method and apparatus has not been known so far. Each process such as stripping, twisting, crimping, etc. is required for crimping a bare round or pre-open type terminal and an electric wire. The strips are needed to strip the wires, the twists are not whiskers, and the crimps are necessary to secure the terminals and strands to the terminals. Conventionally, the above steps have been carried out individually, that is, only the strip, only the twist, or only the crimping have been carried out individually and in different devices. However, if each step is performed through separate preparation steps, it takes time and effort to set wires, terminals, discharge wires, etc., resulting in poor work efficiency and a heavy burden on the operator. The product quality was low due to variations in coating length.

(Problem of the invention) The present invention completes terminal crimping by one-touch (fully automatically crimping the terminal by inserting the electric wire) instead of individually performing the step of crimping the terminal of the electric wire. It is an object of the present invention to provide an electric wire terminal automatic processing method and apparatus for surely preventing an accident in which a new terminal is crimped to an electric wire even though the terminal remains at the crimping point.

(Means for Solving the Problem) According to the present invention, the above problem is solved by the configurations described in the first and second claims.

(Effects of the Invention) According to the present invention, automation of terminal crimping, improvement of work efficiency, improvement of crimping quality and simplification of operation are achieved, and further miniaturization and weight reduction of the apparatus itself are also achieved. The method and the device according to (1) can be advantageously used everywhere in electric installation work.

(Embodiment) The present invention will be explained based on FIG. 1, FIG. 2a to FIG. 2k, FIG. 3, FIG. 4 and FIG.

(Structure) The reduction motor 2 with a one-rotation clutch is mounted on the base 1. AC100V is used as the power supply. Motor shaft
2a has a pinion 3, and a gear 3 and a gear 4 that mesh with the pinion 3 are coaxially fixed to a main shaft 5. The main shaft 5 is rotatably supported by a bearing unit 6 fixed on the base 1 in the direction of arrow A (Fig. 2a). The main shaft 5 has groove cams 7b and 7i and external cams 7a, 7c, 7d, 7e, 7f and 7
g, 7h, 7j and 7k are fixed so that they cannot rotate. The following arrangement is apparent from FIGS. 1 and 2a to 2k.

According to FIG. 2a, the follower 11 having the roller 12 at one end rotates on the shaft fixed to the bracket (not shown) on the base 1 so that the wire clamp comes into contact with the wire clamp cam 7a on the main shaft 5. A follower 11 is rotatably supported and biased by a spring 13, and a pin 14 is provided at the other end of the follower 11. The wire clamp is mounted on a shaft 15 arranged in parallel with the main shaft 5 over the base 1, and a lever 17 fixed to a chuck slide 16 movably arranged in the direction of arrow B (Fig. 2b).
Engages with the forked portion 17a. Chuck slide 16 is base 1
It can also be guided by the upper bracket 1a.
Besides using the spring 13 for the contact between the cam 7a and the follower 11, two cams can be used in the form of positive cams to completely restrain the movement of the follower 11 of the wire clamp. .
A pinion 18 integral with the lever 17 is rotatably attached to the chuck slide 16, and another pinion 19 also attached to the chuck slide 16 is engaged with the pinion 18. Clamp jaws 20 and 21 are fixed to the pinions 18 and 19, respectively.
21 open and close. The clamp jaw 20 has a U-shaped guide groove edge 20a corresponding to the groove of the lower clamp jaw 21.
Is formed so as to project downward, and the guide groove 20a is engaged with a shallow concave groove formed along both edges of the guide groove of the lower clamp jaw 21, which is not shown in detail, when the clamp jaws 20 and 21 are closed. It is designed to catch the electric wire 9 and prevent the electric wire 9 from protruding, and is formed by connecting an indenter at the tip end, which projects radially from the outside of the upper clamp jaw 20 into the guide groove, through a compression spring. An adjusting screw 20b is attached, and the indenter presses the electric wire so that the clamp jaws 20 and 21 of a certain size can guide the electric wire having different diameters (for example, 0.75 to 2.0 mm ² ). (Fig. 2a). Upper clamp jaw
The edge 20a of the guide groove is made to project into the groove 20 so that the electric wire 9 can be reliably guided. The reason for this is that the terminal 10 and the electric wire 10 are clamped by the ejector mechanism described later.
This is due to the provision of a structure capable of discharging 0, 21 in the lateral direction. The support on the shaft 15 of the chuck slide 16 is a slide bearing mounted on the shaft support portion of the chuck slide 16.
It is done via 16a. Chuck slide 1 by it
The vertical reciprocating motion of 6 can be performed smoothly and durablely, and can be performed with reliable stroke accuracy and timing. The shaft 15 is formed as a ball spline.

According to FIG. 2b, the pin 22 fixed to the lower surface of the chuck slide 16 is engaged with the notch 23a at one end of the lever 23 axially fixed to a bracket (not shown) on the base 1. The end is engaged with the groove of the groove cam 7b via the roller 24.

According to FIG. 2c, strip blades 25, 26 are shown,
Roller 27 in lateral grooves 25a, 26a of strip blades 25, 26,
28 is engaged, and the rollers 27, 28 are rotatably fixed to the driven joints 29, 30, while the roller 27a is eccentrically fixed to the driven joint 29, whereby the strip blade 25
The upper and lower positions can be finely adjusted with respect to the reference position according to the thickness of the electric wire, and the rollers 31 and 32 at the other end of the follower are in contact with the cams 7c ₁ and 7c ₂ . _{1 for} cams 7c ₁ and 7c ₂
Form two cams. The followers 29 and 30 are fixed to a bracket (not shown) on the base 1. Both followers 29, 30 are always urged by a spring 33 so that the roller is pressed against the cam surface. It is also possible to perform the opening and closing movement of the strip blade in a motion-restricted manner by an integrated lever without using a spring. Strip blades 25 and 26 are arrows
It moves in the direction of c ₁ and c ₂ or in the opposite direction. A separator 91 is fixedly provided to a bracket on the base 1 immediately before the strip blades 25 and 26 when viewed from the inserting direction of the electric wire 9. The separator 91 is an undesired small portion of the terminal and the electric wire after the terminal is crimped. It is provided to prevent an accident such as a trip being caught on the strip plate.

The twist drive is shown in Fig. 2d, knurled surfaces 35a, 36a
The jaws 35, 36 with the strip plates 25, 26
It is slidably engaged in the lateral grooves 25b, 26b of the. The upper jaw 35 and the lower jaw 36 are pinned to a lever 39 via links 37, 38, the lever 39 is axially fixed to a bracket on the base 1, and the lever 39 has rollers 40, 41 at one end, roller
40 and 41 are in contact with the respective cams 7d ₁ and 7d ₂ . This allows
The jaws 35, 36 are moveable in the directions of arrows d ₁ , d ₂ and vice versa. Twist is strip blade 25, 26
Movably guided laterally in the transverse grooves 25b, 26b of the strip blades 25, 26 such that when the strip blades 26, 26 are closed, the knurled surfaces 35a, 36a of the jaws 35, 36 of the wire A so-called square motion is performed by abutting against the coating and performing a twisting movement, and when the strip blades 25 and 26 move in the releasing direction, a returning movement is performed while separating from the coating.
The twist of the coated portion of the electric wire 9 in which the strip blades 25 and 26 are cut is useful for preventing the loosening immediately after the stop and for maintaining the linearity.

According to FIG. 2e, the follower 45, which is axially fixed to the bracket on the base 1, is in contact with the cam 7e via the roller 46. The other end of the follower 45 has a groove 45a in a fork shape, a pin 47 on another lever 48 is engaged in the groove 45a, and the lever 48 is axially fixed to a bracket on the base 1. The other end 48b of 48 forms a wire stopper. The role of this stopper is clamp jaw
It is to regulate the insertion length of the electric wire 9 when inserting the electric wire 9 into the 20 and 21, so that the strip length of the terminal is accurate. This lever 48, which acts as a butt against the tip of the electric wire 9 when inserting the electric wire 9 into the clamp jaws 20 and 21, has a position corresponding to the position of the longitudinal axis of the electric wire 9 at its starting position (the 0 point position of the cam 7e). Is attached with a touch sensor 49, and the touch sensor 49 connects a lead wire to a control device (not shown). Touch sensor 49 is clamp jaw 2
When the wire 9 is inserted into the wires 0 and 21, the terminal of the wire 9 to which the terminal 10 is to be crimped is sensed, and an operation signal is input to the one-rotation clutch reduction motor 2 to start one rotation of the main shaft 5. Thereby, one rotation of the main shaft 5 is carried out. Lever 48
In addition to the touch sensor 49, another sensor (proximity switch) for sensing the remaining of the terminal 10 at the crimping position and interfering the activation of the spindle 5 can be provided. With this, when the terminal 10 remains at the crimping point, it is detected even if the terminal 10 is not in the position corresponding to the axis of the electric wire,
As a result, the rotation of the main shaft 5 is not started and the safety at the crimping point or the like is achieved.

According to FIG. 2f, a lever 55 that guides and presses the coating of the electric wire 9 is axially fixed to a bracket on the base 1, and has a roller 56 at one end of the lever 55 and a wire guide 57 at the other end. ing. When the lever 55 swings, the movement of the wire guide 57 in the direction of arrow F is applied. That is, the wire guide 57 presses or separates the electric wire 9 on the base 1. The wire guide 57 is provided with a dish-shaped portion 57a at a position corresponding to the longitudinal axis of the electric wire 9 in order to enable accurate alignment guide of the electric wire 9 when the electric wire 9 is abutted after the coating is removed. . This dish-shaped portion is required so that the twisted wire projecting rearward from the wire guide 57 can be centered and enter the barrel of the terminal 10.

According to FIG. 2g, a terminal crimping mechanism is shown. roller
The lever 71 provided with 72 is fixed to a lever-shaped tool 73 having a roller 74, and the crimping tool 73 is pivotally supported by a bracket (not shown) on the base 1. The cam 7g ₂ is for lifting the tool 73, and the cam 7g ₁ is for pressing down the tool 72, that is, for crimping the terminal 10 on the die 1g on the base 1.

FIG. 2h is for explaining magazine feeding. The lever 60 is in contact with the cam 7h via the roller 61, and the jaw 60a at the other end is engaged with the pin 62. The pin 62 is fixed to another shaft on the bracket on the base 1.

It is fixed to the magazine feeding claw 64 and the spring hooking pin 65 is fixed, and a spring 66 is hooked between the spring hooking pin 63 and the pin 65 on the lever 60. Another spring
68 has one end hooked on the base 1 and the other end hooked on a pin 67 on the lever 60. As a result, the magazine 100 is intermittently fed in the direction of the arrow H by the rotation of the cam 7h. The magazine 100 is rotatably supported on a shaft 101 which is supported by an arm 102 which is axially locked 103 by a bracket on an extension 1b of the base 1. The magazine 100 can be switched between a set position and a reset position by an arm. The spring 104 hung between the tip of the 101 and the bracket ensures that the magazine 100 is in the set position (FIG. 2h) on one side and the reset position on the other side with respect to the neutral position of the spring. There is. This allows the magazine 100 to be replaced smoothly.

According to FIG. 2i, the terminal pusher cam 7i formed as a grooved cam is recognized, into which the roller 50 engages, the roller 50
The lever 51 is axially fixed to the base 1 in the vicinity of, and the other end of the lever 51 is engaged with the groove 52a on the lower surface of the terminal pusher 52, and is guided to the bracket 1i of the base 1 by the swing of the lever 51. Terminal pusher
52 is reciprocated in the direction of arrow I.

According to FIG. 2j, the stop signal cam 7j is shown. The stop signal cam 7j controls the rotation of the main shaft 5 via a control device (not shown), that is, the operation of the cam 7i controls the motor 2 with a one-rotation clutch to always rotate exactly once and stop.

According to FIG. 2k, the eject mechanism is shown. 2c
According to the drawings and FIG. 2k, the ejector 80a is pivotally supported on the bracket on the base 1, and the ejector 80a is counterclockwise by the spring 81a in the direction of the arrow in FIG. 2k until it comes in contact with the stopper also attached to the bracket. Is urged in the direction. On the other hand, the ejector lever 82 is a bracket on the base 1.
A pin 84 passing through the groove 82b of the lever 82 is movably supported by the lever 83 in the direction of arrow K. The protrusion 82a pushes the lower end of the ejector 82a by the movement of the lever 82, whereby the ejector 80a moves clockwise in the arrow direction. It can be turned. An ejector rod 85 extending in the same direction as the main shaft 5 is fixed to one end of the ejector 80a. Similarly, the ejector rod 85 is in the arrow k direction of the lever 82,
During movement in the direction towards the main shaft 5, another ejector 80b, which is likewise pivoted on the bracket on the base 1 and spring-biased until it abuts the stopper by the spring 81b, resists the spring force in the direction of the arrow. Turn clockwise. Since the ejector mechanism is provided to eject the terminal 10 and the electric wire 9 laterally with respect to the axis of the electric wire 9, it is not necessary to open the clamp jaws 20 and 21 so much for ejecting the terminal and the electric wire. Clamp Joe 2 by it
It is no longer necessary to close the clamp jaws 20, 21 to stop the rotation of the main spindle 5 before inserting the electric wire 9 into the cord jaws 0, 21, whereby each step can be carried out fully automatically, and the clamp jaws 20, The edge 20a of the guide groove in 21 can be projected downward from the upper clamp jaw 20, and the terminal 10 and the electric wire 9 can be reliably excluded from the clamp jaws 20 and 21 every cycle.

FIG. 3 is an overall view of the magazine, and the magazine 100 is loaded with a large number of terminals 10. The magazine 100, which can be made of synthetic resin, is provided with a large number of concave portions 100a, and each of the concave portions 100a is loaded with one terminal 10 with its axis oriented in the axial direction of the magazine 100. The recess has a width of the connecting portion corresponding to the diameter of the tongue portion of the terminal 10, and a hole 100a corresponding to the diameter of the barrel portion of the terminal is penetrated therethrough. Due to the action of the terminal pusher 52 from the magazine 100, the terminal pusher 52 projects the terminal 10 from the magazine 100 in the direction parallel to the spindle 5 (direction of arrow I).

(Operation of the Invention) The operation of the present invention will be described with reference to FIGS. 1, 2a to 2k, 3 and 4.

Each time the spindle rotates once, each process of wire clamp, chuck slide, strip blade, twist drive, stopper drive, wire guide, terminal crimping, magazine feed, terminal pusher, eject, and rotation stop of the spindle 5 by the stop signal cam are sequentially performed. Is done according to.
Each of these steps is started via the sequence circuit by the detection of the wire end by the touch sensor.

First, in the range on the right side of FIG. 1, the magazine 100 with the terminals 10 loaded in the magazine 100 (FIG. 3) is used as the base 1
Arm 102 supported on bracket axis on extension 1b of
It is set on the shaft 101 fixed to. Then, in the area on the left side of FIG. 1, the electric wire is inserted into the check slide parallel to the main shaft. At this time, the electric wire may be inserted until it hits the stopper 48b.

The wire clamp is a touch sensor attached to the stopper 48.
It is started by the operation of 49 and continues to chuck the front line 9 for about 2/3 of one revolution of the spindle 5.

The chuck slide provided with the clamp jaws 25 and 26 retreats (moves leftward in FIG. 1) and then moves forward (moves rightward in FIG. 1). Upon retraction of the chuck slide, the wire coating is stripped at the strip and twist locations relative to the stop blade movement and twist movement. Next, the advance of the chuck slide is the feeding phase to the crimping point of the twisted wire of the electric wire. The stop blade closes at the beginning of the rotational phase of the spindle, thereby cutting the coating and removing it during the retracting movement of the chuck slide as described above. The setting position of the strip blade 25 (the zero point position of the cam 7c) can be adjusted by rotating the eccentric pin 27a by 180 ° and setting it. The stroke of the chuck slide 16 can be appropriately set according to the thickness of the electric wire.

The twist imparts a twist to the coating and strands by moving the upper and lower knurled jaws 35 and 36 in opposite directions by a mechanism similar to a strip (Fig. 2d) to facilitate removal of the coating and The wire guide 57 ensures the core wire is prevented from coming loose and the straightness is maintained (Fig. 2d).
Aligning is performed advantageously. That is, the twisted wire abutting against the trumpet-like portion 57a of the wire guide 57 is aligned. Twisting is performed in tandem with the operation of the strip, which causes the twisting motion to perform a square motion.

The drive of the wire stopper 48b is performed from the beginning of the rotation phase of the spindle 5 to 2/3 rotation of the spindle 5. Wire stopper 4
The drive of 8b is to open the path for sending the electric wire 9 to the crimping point, and the movement of the wire stopper 48b in the opposite direction causes the terminal 10 to be ejected.

The terminal crimping is performed in synchronization with the operation timing of the wire guide 57.

The magazine is made one tooth for each crimping of one terminal pusher. The step feed (intermittent feed) of the magazine sequentially positions the terminals in front of the terminal pushers.

The terminal pusher projects the terminal in the magazine to the left in FIG. 1 and sends the terminal to the crimping point.

The stop signal cam acts so as to stop the main shaft by exactly rotating once. The stop signal cam operates so that the main shaft rotates exactly once and stops every rotation. Ejectors 80a, 8
0b automatically discharges the wire whose terminals are crimped from the clamp jaws 20 and 21 together with the action of the wire stopper 48b. As a result, a series of steps from the insertion of the electric wire to the crimping of the terminal to the ejection of the electric wire can be carried out automatically. Such an operation can be performed by the block diagram shown in FIG. The voltage from the AC100V power supply activates the forward / reverse rotation motor 2 with speed reducer and the sequence circuit. This operation is displayed on the display circuit, and the touch sensor, the operation of the cam on the spindle, and the interlock switch are displayed via the sequence circuit And under these conditions a manual operation enables inching drive of the device, in particular the spindle. The crimping part, and hence the crimping tool, for reasons such as defective crimping
When the terminal 10 remains on the die 1g below 73, this is detected by a sensor provided in a range such as a crimping die, and rotation start of the spindle is blocked through a sequence circuit. The double-strike prevention is actuated via the sequence circuit so as to prevent the start of the next cycle within the timer setting time at the end of each cycle. This is provided in order to prevent so-called double hitting in the case where the electric wire 9 after being crimped is not removed and remains due to a defective ejector after crimping the terminal to the electric wire. This is done by a sensor to detect the remaining wire on the chuck slide. Further, the stop of one rotation of the main shaft acts via the sequence circuit so that the motor 2 is stopped every cycle by operating the limit switch by the stop signal cam 7j provided on the main shaft 5. Also serves as a start signal for the timer to prevent the start of the next cycle. In addition, an inching circuit for inching the main shaft 5 is provided so that the main shaft is rotated only while the operation button is pressed.

According to the present invention, the wire clamp, the chuck slide,
Strip blade, twist drive, stopper drive, wire guide, terminal crimp, magazine feed, terminal pusher,
The rotation of the main shaft is stopped by each step by the eject and the stop signal cam, and the touch sensor is activated by the insertion of the electric wire, and is automatically performed in one rotation by one rotation of the main shaft (for example, 2, 3).
(In seconds), the working time can be remarkably shortened as compared with the conventional one, and the terminal crimping with excellent crimping quality can be obtained. By providing the ejector mechanism, the accident of crimping the terminal to the newly inserted electric wire even though the terminal remains at the crimping point can be reliably avoided. The electric wire terminal automatic processing device according to the present invention has a substantially horizontal size.
It can be made 300mm, 400mm deep, and 200mm high, which makes the device smaller and lighter and can be conveniently used everywhere in electrical installation work sites.

[Brief description of drawings]

FIG. 1 is a plan view of an electric wire terminal automatic processing method and apparatus according to the present invention, and FIGS. 2a to 2k are wire clamps, chuck slides, strip blades, twist drives, stopper drives, wire guides, terminal crimps, magazine feeds. FIG. 4 is a diagram partially showing the mechanism for each step of the terminal pusher eject and the action by the stop signal cam, FIG. 3 is a magazine, and FIG. 4 is a time chart showing the operation timing of the device according to the present invention, and FIG. FIG. 4 is an operational block diagram of the device according to the present invention. Reference numeral 5 …… Spindle 7a to 7k …… Cam 9 …… Wire 10 …… Terminal 20, 21 …… Clamp jaw 49 …… Touch sensor 100 …… Magazine

Claims (5)

[Claims] 1. Fully automatic by inserting a terminal (10) into a disc-shaped magazine (100), inserting an electric wire (9) into a clamp jaw (20, 21) and activating a touch sensor (49). Purpose, the end of the electric wire (9) is clamped, the coating on the end of the electric wire (9) is removed while twisting, and then the electric wire (9) is clamped and sent to the crimping position, while the magazine (100)
To the crimping position, the terminal (10) is sequentially delivered to the crimping position, the crimping with the terminal (10) is performed under the clamp of the electric wire (9) at the crimping position, and the electric wire (9) crimped to the terminal (10) is discharged. An electric wire terminal automatic processing method characterized by: 2. Fully automatic by inserting the terminal (10) into the disc-shaped magazine (70), inserting the electric wire (9) into the clamp jaws (20, 21) and activating the touch sensor (49). Purpose, the end of the wire (9) is clamped, the coating on the end of the wire (9) is removed while twisting, and then the wire (9) is clamped and sent to the crimping position, while the magazine (100) is crimped sequentially. Deliver the terminal (10) to the position and crimp the terminal (10) under the clamp of the electric wire (9) at the crimping position.
Then, in an apparatus for carrying out an electric wire terminal automatic processing method for discharging an electric wire (9) crimped to a terminal (10), a wire clamp, a chuck slide, a strip blade, a twist drive, and a stopper are provided on one spindle (5). Cams (7a, 7b, 7c, 7d, 7e, 7f, 7g, 7h, 7i, 7j, 7k) for drive, wire guide, terminal crimping, magazine feed, terminal pusher, eject processes and for stop signals. By attaching a tool or member for acting the above-mentioned all processes to each cam via a follower so as to be able to transmit the motion, and by operating the touch center (49) for detecting the insertion of the electric wire (9). One rotation of the main shaft (5) makes it possible to carry out all of the above steps continuously, and at that time, the ejector mechanism surely removes the terminal (10) and the electric wire (9) from the terminal crimping portion every cycle. So Said apparatus characterized by the. 3. The edge (20a) of the U-shaped guide groove is directed downwards in the upper and lower clamp jaws (20) of the clamp jaws (20, 21) in correspondence with the groove of the lower clamp jaw (21). The device according to claim 2, which is formed so as to project. 4. A chuck slide (16), to which a clamp jaw (20, 21) is attached, is movably supported on a shaft (15) via a slide bearing. The apparatus according to item 3. 5. An interlock device is provided for sensing when the terminal (10) remains at the crimping point and preventing activation of the main shaft (5), according to claim 2.
The apparatus according to any one of items 4 to 4.