JPH09161559A - Device for sensing finish of feeding electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sense the end of an electric wire, when feeding it from a bundled wire or a packed wire, near the bundled wire and packed wire, simplify the structure and cut the cost. SOLUTION: Electric wires (a) are drawn out of a coil-bundled wire or a packed wire and fed to various processing stages, when the end of the electric wire is sensed by this device according to the invention. The location should be near the coil-packed wire, etc., and the wire end a'' is drawn out and inserted to the sensing part A, and an electric signal is issued when the end a'' has got out of the part A. The sensing part A is overlapped on the sensing surface to which the end a'' is applied and is composed of a sensor plate 12 capable of rising and falling and energized by a spring 14 in the overlapping direction and a switch 15 actuated when the plate 12 is overlapped on the sensing surface, and the actuation signal of this switch 15 is used as the electric signal mentioned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting the end of an electric wire when the electric wire is drawn from a coil-wound electric wire or a coil-wound electric wire and sent out to various electric wire treatment processes.

[0002]

2. Description of the Related Art For example, an electric wire a for a wire harness is
Broadly classified, a reel electric wire wound around a bobbin reel, a bundle electric wire C ₁ wound in a bundle as shown in FIG. 8 and fixed with a tape t, and a coil in a cardboard box B as shown in FIG. It is conveyed as a pack electric wire C _{2 which} is wound into a shape.

In the process of manufacturing a wire harness using these electric wires C ₁ and C ₂ , for example, when the electric wire a is cut and pressure-bonded, the electric wires C ₁ and C ₂ are close to the stand 1 as shown in FIG. Then, the electric wire a drawn from the pack electric wire C ₂ is guided to the scale cutting and crimping machine 6 through the wire drawing machine 4 and the pre-feeder section 5 through the guide roller 2 and the guide ring 3. First, the electric wire a is connected to the pre-feeder unit 5
The pre-feed roller 5a pulls out the pack electric wire C ₂ and straightens the habit with the wire drawing machine 4, and then the length measuring roller 6a of the length-cutting and crimping machine 6 guides the guide pipes 5b, 6b and the required length. The electric wire a ′ of the required length is guided to the cutting / crimping portion 6c through the feeder control lever 5c.
Along with being cut to size, terminals are crimped on both ends.

At this time, the electric wire a is first pulled out (pulled in) by the pre-feed roller 5a, because pulling only by the length measuring roller 6a causes a large load and the action becomes unstable. Further, both rollers 5a and 6a rotate in synchronization, and when the pre-feeder control lever 5c reaches a predetermined height as shown by the chain line in the figure, the pre-feed roller 5a rotates at a higher speed than the length-measuring roller 6a, and the pre-feeder 5a rotates. When the control lever 5c is lifted, the electric wire a is additionally fed, and when the pre-feeder control lever 5c reaches the normal height as indicated by the solid line, the speed returns to the normal speed. In this way,
The length-measuring roller 6a is adapted to send out a fixed length of the electric wire a without any trouble.

In this wire length cutting and crimping process, the end of the wire a is detected, and the detection device outputs the entire equipment such as the pre-feeder section 5 and the size cutting and crimping machine 6. The conventional detector S is provided in the front stage of the wire drawing machine 4 as shown by the chain line in FIG. 1, and includes a roller type S ₁ shown in FIG. 6 and a magnetic sensor type S ₂ shown in FIG. Has been done.

The former detector S ₁ includes upper and lower rollers 7a,
The electric wire a traveling by 7b is sandwiched, and the lower roller 7b is vertically movable so as to be pushed up by the actuator 7d of the limit switch 7c. The actuator 7d also moves upward, and the switch 7c is turned on. This signal causes the entire device to stop.

The latter detector S ₂ is one in which the electric wire a is passed through the magnetic sensor 8a, and when the end of the electric wire a passes, its magnetic change is controlled by the controller 8b via the sensor 8a.
Is detected and the entire device is stopped by the detection signal.

[0008]

In the former detector S ₁ , the electric wire a drawn from the pack electric wire C ₂ has a winding curl, and a spiral curl is left between the rollers 7a and 7b. If the habit is severe, the habit portion may come off the rollers 7a and 7b, and the detachment may be erroneously detected as the end detection, and the entire apparatus may be stopped.

When the apparatus is stopped, the electric wire a (product) which is being processed is removed from the inside of the length cutting and crimping machine 6, and the electric wire a which is disengaged from the rollers 7a and 7b of the detector S ₁ is transferred to the roller 7.
Work such as fitting between a and 7b is required, which is very troublesome. When the habit of the electric wire a is severe over the entire length, the malfunction frequently occurs, and the above work must be performed each time.

In the latter detector S ₂ , even if the electric wire a has a habit, the electric wire a does not come out from the sensor 8a, so that there is no problem as in the detector S ₁ . However, the sensitivity of the controller 8b must be adjusted according to the size of the wire a. Therefore, when the wire size changes frequently, the sensitivity must be adjusted each time, which is very troublesome. Further, the sensor 8a is expensive and the replacement cost when it is deteriorated is also increased.

In each of the detectors S ₁ and S ₂ , since the detector S (S ₁ and S ₂ ) is far from the position of the electric wire C ₂ , the guide roller 2 and the guide ring are detected at the end point detection. Since the electric wire a is disconnected from the wire 3, the electric wire a must be passed through the wires 2 and 3 when the electric wire a is reset, which is troublesome.

Incidentally, the bundled electric wire C ₁ and the pack electric wire C ₂ have a shorter history than the reel electric wire, and in the case of the reel electric wire, a plurality of reel electric wires are connected at the beginning end and the end end of the electric wire a to continuously connect the electric wire a. The electric wire a to be sent does not have a terminating end.
When the electric wire a is cut, the disconnection is detected. This disconnection detection is usually provided in the front stage of the wire drawing machine 4 in which the traveling of the electric wire a is stable, and therefore is provided in the front stage. Under such circumstances, the bundled electric wire C ₁ and the packed electric wire C
₂ has a long winding length of 5000 m to 6000 m,
The end of the electric wire a is detected without connecting the beginning and end of the electric wire a between the electric wires C ₁ and C ₂ . Conventionally, since the end detection is performed by the same idea (the same detector) as the detection of the breakage of the reel electric wire, the detectors S (S ₁ , S ₂ ) are provided in the preceding stage of the wire drawing machine 4.

Under the above circumstances, it is an object of the present invention to reliably detect the end of the electric wire a near the bundle or pack electric wires C ₁ and C ₂ and to reduce the cost.

[0014]

In order to solve the above problems, the invention according to claim 1 is installed in the vicinity of the above coil winding bundled wire or coil winding pack electric wire, and the bundled wire or pack electric wire is terminated. Is drawn out and inserted into the detection unit, and when the end of the electric wire comes out of the detection unit, an electric signal is emitted.

With this arrangement, the coil-wound electric wire C ₁
Alternatively, since the end of the electric wire is detected near the pack electric wire C _{2 and} the entire device stops (the electric wire stops traveling),
At the time of resetting the electric wire, the work of passing the electric wire through the guide roller 2 or the like is not necessary, and the work is easy. Further, since the end is detected depending on the presence or absence of the electric wire, the detection is reliable, the structure is simple, and the cost is low.

According to a second aspect of the present invention, in the first aspect of the present invention, the detection section is a concrete mode, wherein the detection section is superposed on a detection surface to which the wire end is applied. It consists of a undulating detection plate that is biased in the stacking direction by a spring and a switch that operates when the detection plate overlaps the detection surface, and the operation signal of the switch is the electrical signal.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS. 1 to 5. This embodiment relates to the step of measuring and crimping the electric wire a shown in FIG. Since the same reference numerals indicate the same things, their explanations are omitted. The wire end detector A according to the present invention is attached to the cardboard box B of the pack electric wire C ₂ in the process.

As shown in FIGS. 3 and 4, in the detector A, the upper surface of the prismatic main body 10 is used as a detection surface 11, and a detection plate 12 is undulated at the rear edge of the detection surface 11 via a hinge 13. The detection plate 12 is urged by a spring 14 in the direction in which it overlaps the detection surface 11 as shown in FIG. A limit switch 15 is provided on the front surface of the main body 10. As shown in FIG. 3, when the electric wire a is interposed, the detection plate 12 pushes the operating piece (button) 15a of the limit switch 15 or pushes it. In the case where the contact amount is small and the contacts do not come in contact with each other and the electric wire a does not intervene, the detection plate 12 pushes the operating piece 15a sufficiently so that the contacts come into contact with and separate from each other, and the limit switch 15 outputs an electric signal.

A clip-shaped fixture D is fixed to the detector body 10 with a mounting bolt 16. As shown in FIG. 5, this fixture D has a sandwiching surface 20 bent at a right angle, and is opened and closed by a spring 21 by a well-known structure. Since the holding surface of the fixture D is right,
As shown in FIG. 1 and FIG. 2, it fits snugly into the opening corner of the cardboard box B to securely maintain the open state of the lid b of the cardboard box B, and the detector A can be easily and surely attached.

This embodiment has the above-mentioned configuration and is shown in FIG.
Attach the detector A to the cardboard box B as shown in FIG.
As shown in FIG. 4, the detection plate 12 is lifted and the detection surface 11
Place (apply) the end a ”of wire C ₂ on top, and then
As shown in FIG. 3, the detection plate 12 is superposed on the detection surface 11 with the electric wire end a ″ interposed therebetween. The starting end of the electric wire C ₂ is on the inside and the ending end a ″ is on the outside. If it is reversed, the terminal side electric wire a
This is because the terminal crosses the radial direction of the electric wire C ₂ and the electric wire a cannot be paid out.

In this state, the electric wire a is paid out (pulled up) from the pack electric wire C _2, and when the electric wire C ₂ is finished,
The wire end a ″ comes out between the detection surface 11 and the detection plate 12. Then, the detection plate 12 approaches the detection surface 11 as much as the wire end a ″ disappears, and pushes the operating piece 15a of the limit switch 15 to switch the switch. The end detection signal is sent from 15 to the control panel of the device through the lead wire 15b, and the entire device stops.

In the above embodiment, the pack electric wire C ₂ is used, but the electric wire end a ″ is detected in the same manner for the bundled electric wire C _{1. In} this case, the detector A is placed on the stand 1 or the like. Install.

[0023]

As is apparent from the above description, the present invention detects an electric wire terminal that does not move at all times by sandwiching (inserting) the electric wire terminal, so that there is little risk of malfunction and the electric wire size has a high detection accuracy. Not affected. Further, the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram in which one embodiment is adopted in a wire length cutting and crimping process.

FIG. 2 is an enlarged perspective view of an essential part of FIG.

FIG. 3 is a perspective view for explaining the operation of the embodiment.

FIG. 4 is a perspective view for explaining the operation of the embodiment.

FIG. 5 is a perspective view of a fixture for the wire end detector.

FIG. 6 is a schematic perspective view of a conventional wire end detector.

FIG. 7 is a schematic perspective view of a conventional wire end detector.

FIG. 8 is a perspective view of a bundled wire.

[Explanation of symbols]

A, S, S ₁ , S ₂ Wire end detector B Cardboard box a Wire a ”Wire end b Cardboard box lid C ₁ Bundle wire C ₂ Pack wire D Wire end detector fixture 1 Stand 2 Guide roller 3 Guide ring 4 Wire drawing machine 5 Pre-feeder section 6 Scale cutting and crimping machine 10 Detector body 11 Detection surface 12 Detection plate 13 Hinge 14 Spring 15 Limit switch 15a Limit switch operating piece 16 Mounting bolt

Claims (2)

[Claims] 1. A device for detecting the end of the electric wire a when the electric wire a is drawn out from the coil winding bundled electric wire C ₁ or the coil winding pack electric wire C ₂ and sent out to various electric wire treatment processes, Bundled wire C ₁ or coil-wound pack wire C
Installed in the vicinity of ₂ , bundled wire C ₁ or packed wire C
_2. An electric wire end detection device, wherein the electric wire end a ″ of ₂ is pulled out and inserted into a detection portion, and an electric signal is emitted when the electric wire end a ″ comes out of the detection portion. 2. A detection plate (12) which is superposed on a detection surface (11) to which the electric wire end (a ") is applied and which is undulated by a spring (14) and urged in the superposing direction.
2. The electric wire end detection device according to claim 1, further comprising a switch 15 that operates when the detection plate 12 overlaps the detection surface 11, and an operation signal of the switch 15 is the electric signal.