JPH08190978A - Method for crimping plug terminal against round type two core power supply cord and device thereof - Google Patents

Abstract

PURPOSE: To let a plug terminal be automatically pressed in contact with the terminal end of a round type power supply cord by a series of operations. CONSTITUTION: Let the terminal end of a cord run straight. In the half of the running, notching 1e is made in the circumferential direction inwardly from the end of the cord 1, its sheath end 1d' is shifted to the end side of the cord 1, and both of cores 1c and 1c are thereby exposed. The roll of the cord 1 in the circumferential direction allows both the exposed cores 1c to be lined up along the running line, both the cores 1c are held by holding pieces thereafter, the holding pieces are drawn to the end side of the cord 1 while the cores 1c are being rolled between the hold pieces, thereby the cores 1c are untwisted, the sheath end 1d' is furthermore shifted to the end side of the cord, and the sheath end is thereby removed out of the cores 1c. Continuously, the cores 1c are furthermore straightened for putting their tip ends in order, insulating material 1b is peeled out of both the cores 1c thereafter, and a plug terminal 2 is then pressed into contact with the exposed electric conductor 1a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for crimping a plug terminal to a round two-core power cord.

[0002]

TECHNICAL BACKGROUND In a high-current electric device and an electric device having a function of automatically winding a power cord, such as a vacuum cleaner, a round two-core power cord is used. As shown in FIG. 15, the round-shaped two-core power cord 1 has a conductor 1a covered with an insulator 1b to form a core 1c, and a pair of cores 1c and 1c is covered with a sheath 1d while being loosely twisted. .

Therefore, in order to attach the plug terminal 2 to the power cord 1, the sheath 1d of the cord end is peeled off, the exposed core 1c is untwisted, and the insulator 1b is peeled off.
Each step of crimping the plug terminal 2 onto the exposed wire conductor 1a is required (see FIG. 13). That is, at least two steps of peeling the sheath 1d and untwisting the core 1c are necessary for the flat power cord.

[0004]

In the conventional automation of the crimping of the plug terminal 2 to the round two-core power cord 1, the automatic crimping of the plug terminal to the flat power cord is used together. The automatic crimping machine runs a trimming machine, a stripping machine, a crimping machine and a power cord terminal, cuts and chops the cord terminal by the trimming machine, and strips the insulator of the cord terminal by the stripping machine to remove the wire conductor. It exposes and crimps the plug terminal to the exposed electric wire conductor by a crimping machine. That is, there is no step of peeling the sheath 1d and untwisting the core 1c.

Therefore, the sheath 1d is peeled off and the core 1 is removed.
The untwisting of c is performed manually beforehand separately, and after both the work is completed, that is, after making the same shape as the flat power cord with the core 1c of the pair exposed, the power cord 1 is used as a conveyance grip of the automatic crimping machine. I am holding it.

However, performing the peeling of the sheath 1d and the untwisting of the core separately are troublesome and contribute to a reduction in the efficiency of the work of crimping the plug terminals to the round twin-core power cord 1. For this reason, even in the case of the round two-core power cord 1,
It is desired to continuously crimp the plug terminal 2 including the peeling of the sheath 1d and the untwisting of the core 1c.

Under the above circumstances, it is an object of the present invention to automate each step from the sheath peeling to the crimping of the plug terminal in mounting the plug terminal to the round two-core power cord terminal.

[0008]

In order to solve the above problems, in a first invention relating to a crimping method, the end of a round two-core power cord is formed into a straight line at a right angle to the straight line direction. The core is exposed by peeling a sheath of a required length from the end of the power cord during running, and the core is exposed by rotating the power cord in its circumferential direction so that the exposed base ends of both cores are connected to the running line. After lining up along
The two cores were untwisted, the insulators of both cores were peeled off, and then the plug terminals were crimped onto the exposed wire conductors to be attached.

Further, in the second invention relating to the crimping method, similarly, the terminal of the round-shaped two-core power supply cord is linearly made to run at a right angle to its right angle direction, and the power supply is in the middle of this running. By making a notch in the circumferential direction in the sheath portion of the required length from the cord end and shifting the sheath end to the cord end side by the required length to expose both cores, by rotating the power cord in the circumferential direction, After arranging both exposed cores along the running line, untwist both cores and shift the sheath end further toward the cord end to remove it from the core, and then peel off the insulators of both cores. After that, a structure was adopted in which the plug terminal was crimped and attached to the exposed wire conductor.

In the first and second aspects of the present invention, the untwisting of the core is performed by sandwiching the core between the sandwiching / untwisting pieces and rolling the core between the sandwiching / untwisting pieces. It may be configured to be performed by pulling to the cord end side.

In the invention relating to the crimping device, there is provided means for holding the terminal of the round-shaped two-core power cord and making it travel laterally in a straight line. Along the running line, the power cord terminal of the required length is provided. Sheath stripping means, means for arranging both cores exposed by the sheath stripping along the running line, means for untwisting both cores, means for stripping the core insulator, and wire conductors exposed by stripping the insulator The structure is provided with means for crimping the plug terminals.

[0012]

According to the present invention thus constructed, as the power cord terminal runs, the sheath of the terminal is stripped, the pair of cores are arranged in parallel, the core is untwisted, the core insulator is stripped, and the plug terminal to the wire conductor is removed. Each crimping operation is continuously performed. In this action, the parallelization of the pair of cores is to have the same grip as the flat power cord.

[0013]

1 and 2 are schematic views of one embodiment, FIG. 1 is a plan view and FIG. 2 is a front view. In this embodiment, front and rear two rails 10 are provided over substantially the entire length of the front side of the upper surface of the housing H. Along the rails 10, from the middle stage to the rear stage, similar to a crimping device in a conventional flat power cord. A trimming machine A, a stripping machine B, a crimping machine C, and a transfer robot D are provided. On the other hand, from the front stage to the middle stage along the rail 10, a feeder E for feeding a cord carrying plate 11, a feeder F for the power cord 1, a semi-peeling machine G for the sheath 1d, a parallel machine I for the core 1c, and a twisting machine for the core 1c are provided. The returning machine J and the flat machine K of the core 1c are provided. Further, robots L1 and L2 for feeding in or taking out the transport plate 11 are provided in front of the delivery machine E and between the crimping machine C and the transport robot D.

First, the power cord 1 is linear (rail 10
The transport means for transporting (traveling) to the upper side will be described. The transport plate 11 shown in FIGS. 4 to 6 is movably placed in a row on the rail 10, and the grip 40 is provided on the transport plate 11. Has been. The number of grips 40 is arbitrary. The grip 40, as shown in FIG.
1, standing pieces 41 are provided on the upper surface at equal intervals, and a stop piece 42 and a pressing piece 43 are provided corresponding to each standing piece 41.
The stop piece 42 is screwed to the carrier plate 11 on both sides thereof, and the pressing piece 43 is positioned in the front recessed portion with the spring 44 interposed therebetween. The insertion support groove 45 is formed.

The power cord 1 is inserted into the groove 45 in a state where the pressing piece 43 is pushed into the recess of the stop piece 42. The power cord 1 is pressed by the pressing force of the spring 44.
Is pressed against and supported by the standing piece 41 (receiving piece) (see FIG. 5). A pin 46 projects from the lower surface of the pressing piece 43, and the pin 46 penetrates the elongated hole 12 of the transport plate 11. Therefore, as shown by the chain line arrow in FIG. 6, when the pin 46 is pushed by the opening pin 38 of the grip releasing mechanism which will be described later, the pressing piece 43 enters the recess 42 a of the stop piece 42 and enters the groove 4.
5 is open. When the open pin 38 is disengaged from the pin 46, the pressing piece 43 is returned by the spring 44 to support the power cord 1.

Next, the one-way clutch 20 and the disengagement mechanism 30 required to disengage the grip 40 will be described. As shown in FIGS. 1 and 2, the one-way clutch 20 is provided on the rail 10. The one-way clutch 20 is appropriately provided at a position where the reverse movement of the transport plate 11 causes a problem, and is always provided at a stage before a grip releasing mechanism 30 described later.

As shown in FIGS. 4 and 5, the one-way clutch 20 is provided with a base 21 between the rails 10, and a groove 22 having a triangular shape in plan view is formed on an inner surface of the base 21 facing each other.
Is formed, and the roller 23 is put in the groove 22. The roller 23 is moved by the spring 24 via the pushing piece 25 into the groove 2
When the carrier plate 11 is urged toward the narrow side of 2, and the carrier plate 11 tries to move in the direction of the arrow in FIG. 4 in the base 21, the roller 23 moves to the narrow side of the groove 22 and the carrier plate 11 moves. Are blocked (see FIG. 7B). Since the roller 23 is constantly pushed toward the narrow side of the groove 22 by the spring 24, if the transport plate 11 tries to move in the direction of the arrow in FIG. 4, it is instantly bitten and blocks its movement. With respect to the movement in the direction of the reverse arrow, the roller 23 moves in the direction in which the groove 22 spreads, so that there is no hindrance to the movement of the transport plate 11 (see FIG. 7A). Therefore, the transport plate 11 moves the rail 10 only in the direction of the arrow in FIG. The roller 23 is prevented from falling out of the groove 22 by a cover 26 on the upper surface of the base 21 and a stopper 27 on the lower portion of the inner surface.

A grip opening mechanism 30 is provided below the feeder F of the power cord 1 and the core parallel machine I. In this grip releasing mechanism 30, as shown in FIGS. 3 and 8, the moving frame 31 is driven by the pulse motor 32 to form the screw shaft 3.
The vertical moving plate 34 is attached to the frame 31 so as to be vertically movable by a cylinder 35. A cylinder 36 is provided on the up-and-down moving plate 34, and a piston rod 37 of the cylinder 36 is connected to an open pin 38. In the figure, 39 is a guide shaft.

Therefore, as shown in FIG. 3 (a), when the continuous transport plates 11 are stopped, as shown in FIG. 3 (b), the vertical moving plate 34 is lifted to open the open pins 38 to the transport plates. 11 Insert into the groove 13 on the back of the pin 4 of the grip 40
6 and the pin 46 is moved by the cylinder 36 via the opening pin 38 as shown by the chain line arrow in FIG. 6A, the pressing piece 43 moves and the groove 45 is opened. This operation is performed for each grip 40. During this operation, the one-way clutch 20 prevents the transfer plate 11 from moving in the pressing direction against the pressing force of the opening pin 38.

The robots L1 and L2 for feeding in or taking out the carrier plates 11 at the start and rear ends of the rail 10 are rails 1
There is a rail 10 'corresponding to 0, and this rail 10' is set at the same level as the rail 10 to transfer or receive the carrier plate 11. That is, in the robot L1 on the starting end side, the transport plate 11 whose traveling is stopped by the air cylinder 53 in the state where the rail 10 'is lowered is the rail 1'.
When it moves to 0 ', it rises and moves the carrier plate 11 to the rail 10
Same level as.

On the other hand, the robot L2 on the terminal side has rails 1
When 0'is raised and is at the same level as the rail 10, when the carrier plate 11 reaches the rail 10 ', it is lowered to move the rail 10' to the roller conveyor 52 between the robots L1 and L2.
Then, the conveying plate 11 is pushed out onto the roller conveyor 52 by an appropriate means such as a cylinder. Conveyor plate 11
Moves on the conveyor 52 due to the pushing force and the inclination of the conveyor 52, is stopped by the air cylinders 53, 53 ', and waits for the delivery to the start end side robot L1. There are two air cylinders 53, 53 'because the air cylinder 53 on the start end side feeds the transport plate 11, and the air cylinder 53' on the rear end side stops the subsequent transport plate 11. is there.

In the carrier E, the arm 60 is capable of moving the sliding rod 61. The rotation of the pulse motor 62 causes the screw shaft 63 to move the arm 60 at a high precision required pitch. Stops at the required position with high accuracy. For this reason, as shown in FIG. 3A, in the delivery machine E, the screw shaft 63 is rotated by the motor 62 in a state where the arm 60 is in contact with the rear end surface of the transport plate 11 on the rail 10 start end side. Conveyor plate 1 at the pitch of each grip 40
1 is intermittently fed with high accuracy.

Above, the power cord 1 is linear (rail 10
It was the explanation of the means to run above, but next,
Various machines for processing the power cord (crimping, etc.) and their functions will be described.

In the power cord feeder F, the end of the power cord 1 pulled out from the take-up reel is inserted into the grip 40 on the carrier plate 11 from the rear side of the housing H,
After projecting the required length to the front side, the power cord 1 is disconnected. At this time, the grip 40 is opened by the above-mentioned action, and is closed after the power cord 1 is inserted. The power cord 1 can be fed or cut by hand.
The power cord 1 supported by the grip 40 is sent to the semi-peeling machine G of the sheath 1d after the support is confirmed by the detector S1.

As shown in FIG. 9, the semi-peeling machine G is provided with cutting blades 70 and 71 which are vertically movable above and below the carrying level, and the cutting edges 70a and 70a thereof are the core 1c.
It is an arc that does not damage the. Therefore, as shown by the chain line in the figure, when the double-edged blades 70, 71 abut, the sheath 1 at a position where the required length is inserted from the end of the cord 1 end.
The cutting edges 70a and 71a bite into the required depth around the entire circumference of d (the cut 1e enters), and in that state, the blade is retracted toward the terminal side by about 2 to 3 mm. Then, the sheath 1d is cut at the biting portion and is displaced toward the terminal side, and a part of the cores 1c and 1c is exposed as shown in FIG. 13 (a). The power cord 1 with the exposed core 1c is sent to the next core parallel machine I.

The core parallel machine I, as shown in FIG. 10, has cord holding and rotating rollers 80a, 81a on the front and rear of the rail 10.
81a, 80b, 81b, 81b and core 1c, 1c color and position detectors 82a, 82b. The upper rollers 81a and 81b can move up and down, and when the power cord 1 reaches a predetermined position, it descends and holds the cord 1 together with the lower rollers 80a and 80b. In this holding state, the grip of the cord 1 is released by the grip releasing mechanism 30, and the lower rollers 80a and 80b rotate left and right in synchronization.

Simultaneously with this rotation, the color position detectors 82a, 82b in the tilting direction detect the colors and positions of the exposed cores 1c, 1c, and when the cores 1c, 1c line up along the line, the roller 80a. , 80b is stopped and the grip opening mechanism 30 releases the grip opening and grips the power cord 1. That is, the insulators 1b and 1b of the two cores 1c and 1c are usually color-coded into two colors such as red, white, and black, and each detector 82
The color detection light rays of a and 82b pass through the position where the cores 1c and 1c are lined up (see FIG. 13B). Therefore, when the power cord 1 is rotated in the circumferential direction and the cores 1c and 1c of a desired color are lined up along the line as shown in FIG. 13B, for example, the red core 1c is in front. Side (left side of FIG. 13B),
When the white cores 1c are lined up on the front side, it is detected by the detector 8
2a and 82b detect and stop the rollers 80a and 80b, and give a grip signal to the clip opening mechanism 30. The power cord 1 in which the cores 1c and 1c of the required color are arranged in order is sent to the next untwisting machine J.

As shown in FIG. 11, the untwisting machine J includes holding pieces 90a and 90b of the power cord 1 and untwisting pieces 91a and 9b.
1b and. The lower holding piece 90a is fixed, and the upper holding piece 90b is vertically movable. When the power cords 1 of the cores 1c arranged in parallel are in the working position, the holding piece 9
0b descends and holds the power cord 1. Untwisting piece 91
Both a and 91b are vertically movable and can be moved left and right, front and back, and when the power cord 1 is held and fixed by the holding pieces 90a and 90b, the double twisting back pieces 91a and 91b move up or down. The sheath piece 1d ′ that has been cut off is pinched, and while moving left and right as indicated by the solid arrow, it moves backward as indicated by the dashed arrow. By this movement, the two cores 1c, 1c are untwisted and returned, and the sheath piece 1d 'is removed (see FIG. 13 (c)). By pulling out the sheath piece 1d ', the core 1c is untwisted and straightened to some extent. The power cord 1 that has been untwisted by removing the sheath piece 1d ′ is sent to the flat machine K.

As shown in FIG. 12, the flat machine K includes the holding pieces 95a and 95b of the power cord 1 and the flat roller 9 as shown in FIG.
6a and 96b. The action of the holding pieces 95a, 95b is the same as the holding pieces 90a, 90b of the untwisting machine J. Both the flat rollers 96a and 96b are vertically movable and can be moved back and forth, and when the power cord 1 is held and fixed by the holding pieces 95a and 95b, the flat rollers 96a and 96b are fixed.
a and 96b are cores 1c exposed by rising or falling,
The base portion of 1c is clamped, and in this state, the cores 1c and 1c are straightened as much as possible by moving backward as shown by a chain line (see FIG. 13 (d)).

The power cord 1 in which the cores 1c and 1c are straightened is thereafter sent to the same crimping process of the tip of the flat power cord, the stripping of the insulator 1b and the plug terminal 2.

That is, the core 1 is cut by the trimming machine A.
After the tips c, 1c are cut and aligned (FIG. 13E), the stripping machine B is passed through the detector S2 for the presence or absence of the cut and alignment.
Thereby, the insulator 1b is peeled off to expose the electric wire conductor 1a (FIG. 13 (f)). The exposed power cord 1 of the wire conductor 1a is used as a peeling edge detector S3 and a peeling tip detector S4.
And sent to the crimping machine C.

The crimping machine C is fed with a terminal strip S connecting the plug terminals 2 from the terminal reel R.
13 (g), the exposed wire conductor 1a is applied to the crimping pieces 2b, 2b of the pair of plug terminals 2 and, as shown in FIG.
A'is cut and the plug terminal 2 is crimped to the electric wire conductor 1a with the crimping piece 2b.

The above-mentioned cutting blades 70 and 71 and the roller 8
1a, 81b, holding pieces 90b, 95b, untwisting piece 91
For the vertical movement, forward-backward movement, and left-right movement of a, 91b and the flat pieces 96a, 96b, well-known ones such as cylinders and screw drives are adopted.

Structure of each mechanism (A to L2) of this embodiment,
The operation is as described above. The feeder F feeds the carrier plate 11 at the pitches of the grips 40, and when the feeding is stopped, the power cord 1 is located at the work position of each of the machines A to K. The power supply cord 1 is inserted and supported in each grip 40 by operating the grip releasing mechanism 30, and thereafter, the sheath semi-peeling, the core parallel, the core untwisting, the core flat, the core trimming, the insulator strip, the plug terminal crimping, and the connecting cut. Then, the power cord 1 with the plug terminal 2 shown in FIG. 15B is obtained. The power cord 1 is sent to a resin molding machine (not shown) by the transfer robot D, the synthetic resin 3 is mold-coated on the crimping portion, and the power cord 1 with the plug terminal 2 shown in FIG. Become. On the other hand, the power cord 1 is removed and the rail 10
The transport plate 11 reaching the end is sent to the roller conveyor 52 by the robot L2 and returns to the start end of the rail 10.

In the above-described embodiment, the power supply cord 1 is transported by the transport plate 11, but as shown in FIG. 14, the present invention can be applied to the transport by the chain T, which is the same as the conventional one. At this time, the grip 40 is the chain T
Is stopped by the grip opening mechanism 30 described above. The drag force at this time depends on the stopping force of the sprocket 5.
The drag force may be obtained by inserting a pin into the chain T.

In the above embodiment, the core 1c was untwisted from above the sheath piece 1d '(invention of claim 2), but the sheath semi-peeling machine G removed the sheath piece 1d'.
The core 1c may be directly held to untwist (claim 1).

[0037]

Since the present invention is configured as described above, the plug terminal can be automatically crimped onto the round two-core power cord, and the cost of the work can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view of one embodiment.

FIG. 2 is a front view of the same embodiment.

FIG. 3 is an explanatory view of the main operation of the same embodiment.

FIG. 4 is a perspective view showing the operation of main parts of the embodiment.

FIG. 5 is a perspective view showing the operation of the main part of the embodiment.

FIG. 6 is an exploded perspective view of essential parts of the embodiment.

FIG. 7 is an operation explanatory view of the one-way clutch of the same embodiment.

FIG. 8 is a perspective view of an essential part of the embodiment.

FIG. 9 is an explanatory view of the sheath semi-peeling action of the same embodiment.

FIG. 10 is an explanatory view of the core parallel operation of the same embodiment.

FIG. 11 is an explanatory view of the untwisting action of the same embodiment.

FIG. 12 is an explanatory view of a core flat action of the same embodiment.

13 (a) to (i) are explanatory views of the operation.

FIG. 14 is an enlarged view of a main part of another embodiment.

FIG. 15 is a perspective view of a round two-core power cord with a plug terminal.

[Explanation of symbols]

A trimming machine B stripping machine (core insulation peeling machine) C crimping machine D carrier robot E carrier plate feeder F power cord feeder G sheath semi-peeler H housing I core parallel machine J core untwister K Core flat machine L1 Conveyor plate feeding robot L2 Conveyor plate take-out robot T chain 1 Power cord 1a Electric wire conductor 1b Insulator 1c Core 1d Sheath 1e Cut 10, 10 'Rail 11 Conveyor plate 12 Long hole 20 One-way clutch 21 One-way clutch base 22 Groove 23 Roller 24 Spring 25 Push piece 26 Cover 27 Stop piece 30 Grip release mechanism 31 Moving frame 32 Pulse motor 33 Screw shaft 34 Vertical moving plate 35, 36 Cylinder 37 Piston rod 38 Open pin 40 Grip 41 Standing piece 42 Stopper 43 43 Presser foot Piece 4 Spring 45 Grip Groove 46 Pin 50 Rail Start End Side Feeding Robot 51 Rail End Side Taking Out Robot 52 Roller Conveyor 53 Air Cylinder 60 Conveyor Plate Feeder Arm 61 Sliding Rod 62 Pulse Motor 63 Screw Shaft 70, 71 Cutting Blade 70a, 71a Blade edge 80a, 80b, 81a, 81b Cord holding rotary roller 90a, 90b, 95a, 95b Holding piece 91a, 91b Untwisting piece 96a, 96b Flat piece

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[Procedure amendment]

[Submission date] May 1, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Fig. 13

[Correction method] Change

[Correction content]

FIG. 13 is an explanatory view of the plug terminal crimping action of the embodiment.

Claims (4)

[Claims] 1. The core of a round two-core power cord 1 is made to run linearly at right angles to the linear direction, and during this running, a sheath 1d of a required length is peeled from the end of the power cord 1 to form a core. 1c and 1c are exposed, and the power supply cord 1 is rotated in the circumferential direction so that the exposed base ends of both cores 1c are aligned along the running line, and then both cores 1c are untwisted. Then, after the insulator 1b of both cores 1c is peeled off, the plug terminal 2 is crimped and attached to the exposed electric wire conductor 1a. 2. A round-shaped two-core power supply cord 1 is made to travel linearly at a right angle to the right angle direction, and in the middle of this travel, a sheath portion of a required length is extended from the end of the power supply cord 1 in the circumferential direction thereof. By inserting the cut line 1e and shifting the sheath end 1d toward the cord end side by a required length to expose both cores 1c and 1c, and rotating the power cord 1 in the circumferential direction, the exposed cores 1c are run. After arranging along the line, both cores 1c are untwisted, and the sheath end 1d 'is further displaced to the cord end side to remove it from the core 1c, and then the insulator 1b of both cores 1c is peeled off. After that, the plug terminal 2 is crimped and attached to the exposed electric wire conductor 1a, and the plug terminal is crimped to the round-shaped two-core power cord. 3. The method for crimping a plug terminal to a round two-core power cord according to claim 1, wherein the core 1c is provided.
By twisting the core 1c between the holding / untwisting pieces 91a, 91b and rolling the core between the holding / untwisting pieces 91a, 91b, pull the holding / untwisting piece toward the cord end side. What is characterized by doing. 4. A means for holding the end of the round two-core power cord 1 and running it in a laterally straight line is provided, and a sheath stripping means G having a required length of the power cord 1 end is provided along this running line. A means I for arranging both cores 1c exposed by the sheath peeling along the running line,
Means J for untwisting both cores 1c, means B for peeling the insulator 1b of the core 1c, and means C for crimping the plug terminal 2 to the electric wire conductor 1a exposed by the peeling of the insulator 1b.
A crimping device for a plug terminal to a round-shaped two-core power cord, which is characterized in that