JP2930282B2 - Electric wire feeder with joint detection mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire feeder provided with a joint detecting mechanism for use in manufacturing electric wires with terminals constituting a wire harness.

[0002]

2. Description of the Related Art In general, when manufacturing an electric wire with a terminal, the electric wire is pulled out from an electric wire drum, measured, cut into a predetermined length,
This is performed by stripping the insulating coatings at both ends and crimping the terminal to the exposed conductor. FIG. 12 shows a conventional wire feeder A. The apparatus A includes straightening roll units 1 and 2 for taking a bend or a habit of an insulated wire W, a pair of right and left feed rolls 3 for measuring and supplying the wire, and a guide nozzle 4 for holding the wire. . The guide nozzle 4 has a first nozzle 4a and a second nozzle 4b connected to each other across an electric wire clamping area 4c, and feed rolls 3, 3 are provided so as to be able to freely contact and separate the area 4c.

[0003]

Conventionally, when one electric wire drum becomes empty, it has been replaced with another electric wire drum and the electric wire has been set again in the feeder. However, it takes time to reset the drum every time the drum is replaced. During that time, the feeding of the electric wires or the production of the electric wires with terminals must be completely stopped, which is inefficient. The present invention has been made in view of such a problem, and by previously joining the wire end of one wire drum and the tip of the wire in the other wire drum, continuously without interrupting the wire feed. It is an object of the present invention to accurately detect a joint portion and to obtain information necessary for cutting the joint portion. Another object of the present invention is to provide a device that does not cause the electric wire to come off from the conduction detection roll or the straightening roll when the electric wire is supplied. Another object of the present invention is to provide an apparatus having a structure capable of detecting a joint portion of an electric wire and avoiding upsizing of the apparatus.

[0004]

According to a first aspect of the present invention, there is provided an electric wire feeder having a joint detecting mechanism, comprising: a straightening roll unit comprising a pair of roll rows; In a wire feeder including a pair of feed rolls, means for applying a voltage between at least a pair of straightening rolls selected from the pair of roll rows,
A means for detecting the presence or absence of energization when the insulated wire or the joint thereof passes between the pair of straightening rolls is provided. It is preferable that an annular guide groove is similarly provided on the intermediate peripheral wall of each straightening roll of the pair of roll rows (claim 2).

[0005]

According to the first aspect of the invention, when the insulated wire passes through the straightening roll unit composed of a pair of roll rows, that is, in a normal wire feeding state, a pair of straightening units provided with a means for applying a voltage is provided. No electricity is supplied between the rolls because they are insulated. When the core wire portion, which is a joint portion, passes, electricity is supplied between the straightening rolls, so that it is understood that the joint portion of the electric wire between the two electric wire drums has entered the electric wire feeding device. When this energization signal is output, for example, by cutting and removing only the electric wire including the joint portion by a predetermined length, it becomes possible to perform the manufacturing of the electric wire with terminal substantially without interruption.

Further, since the straightening roll itself is provided with the joint detecting mechanism, it is not necessary to separately provide a pair of energization detecting rolls, so that an increase in the size of the apparatus can be avoided.
In addition, by providing the annular guide groove portion in each straightening roll, there is no disconnection of the electric wire in the straightening roll unit, so that straightening and supply can be performed more reliably.

[0007]

FIG. 1 is a plan view for explaining the apparatus according to the present invention, FIG. 2 is a sectional view of a main part of a pair of energization detecting rolls, and FIG. 3 shows a joint detecting circuit of the apparatus shown in FIG. It should be noted that the same components as those in FIG. 12 showing the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted. 1 and 2,
Reference numeral 1 denotes a straightening roll unit in the electric wire feeder, which is provided with a pair of conduction detecting rolls 5 and 5 'in front of the unit. Conductive metal bearings can be used as the energization detecting rolls 5, 5 '. 6,6 '
Is a roll shaft, and 7 and 7 'are mounting substrates thereof. One mounting substrate 7' is provided with a spring 9 between a stopper 8 and a base (not shown) so that one energization detecting roll 5 'is always It is urged toward the other energizing roll 5. Reference numerals 10 and 10 'denote lead wires, one of which is connected to the power supply side and the other is connected to the ground side.

In FIG. 3, reference numeral 11 denotes an energization detecting roll 5,
Switch composed of 5 'and a joint of electric wire, 1
2 is a power supply, 13 is a resistor, and 14 is a detector. Detector 1
4, the alarm lamp is turned on by the output signal (when passing through the core portion), the feed roll (see FIG. 12) is temporarily stopped,
Alternatively, the required output can be obtained, such as cutting the electric wire including the joint portion, and further starting the joint work with the drum of the next electric wire, by measuring and supplying a predetermined length by rotating the roll. I have.

Next, the operation of the above device will be described.
FIG. 4 shows a normal wire feeding state. A pair of current detection rolls 5, 5 'from being insulated by an insulating coating W ₂ of the electric wire W, the rolls 5,5' between the not energized.

[0010] Figure 5 is detection state of the joint portion, i.e. the joint portion W ₁ is in a state of entering, sandwiched between energized sensing roll 5, 5 '. At this time, conduction is established between the mounting board 7 → the roll shaft 6 → the energizing detection roll 5 → the joint portion W ₁ → the energizing detecting roll 5 ′ → the roll shaft 6 ′ → the mounting board 7 ′, and the switch 11 in FIG. Since the state is established, the detection circuit operates and a required output can be obtained.

FIG. 6 shows an electric wire W between the conduction detecting rolls 5 and 5 '.
Indicates that there is no At this time as well, the switch 11 is turned on as in the case of FIG. 5, but by providing a sensor (not shown) for detecting the position of the stopper 8 of FIG. You should be able to do so.

FIG. 7 shows an improvement of the apparatus of FIG. In FIG. 2, the energization detecting roll 5 '(5) and the roll shaft 6'
Normal grease G exists between (6). For this reason, conduction between the two rolls 5 and 5 'is hindered, and a detection error may occur. Then, the brushes 16 and 16 'made of carbon or the like urged by the springs 15 and 15' are brought into contact with the energization detecting rolls 5 and 5 ', respectively.
6, 16 'are directly connected to the lead wires 10, 10'. In the case of this improved example, since the brush 16 → the conduction detecting roll 5 → the joint portion W ₁ → the conduction detecting roll 5 ′ → the brush 16 ′ conducts without the above-mentioned grease G, no detection error occurs.

FIG. 8 shows another improvement of the apparatus of FIG. That is, in the apparatus shown in FIG. 2, the current detecting roll 5 (5 ') and the mounting board 7 (7') are connected by a brush 17 (17 ') urged by a spring (not shown). Book break
In the case of good example, since the conduction state was併Align to FIGS. 2 and 7 obtained, the occurrence of detection error is further reduced.

When the electric wire W is supplied, the pair of energizing detecting rolls 5, 5 'shown in FIGS.
There is a possibility that the electric wire W may come off from 5 '. FIG. 9 shows an apparatus obtained by improving the apparatus shown in FIG. This device is formed as a two-stage upper and lower energization detection roll in which a pair of opposing energization detection rolls 5 and 5 'are overlapped by upper and lower two via washers 18 and 18', respectively. between rolls 5,5 a sufficiently small width of the annular guide groove S than the outer diameter of the core wire W ₁ of the electric wire W is provided in parallel with the feed direction of the wire W by the washer 18. According to an experiment, the groove width of the annular guide groove portion S is
It was found that a 1/3 to 2/3 of the outer diameter of ₁ is preferable. Reference numerals 19 and 19 'are bolt-shaped roll shafts.

According to this improved example, the electric wire W is sandwiched between the two-stage energization detecting rolls 5, 5 and 5 ', 5' on both sides, and the outer periphery of the electric wire W is formed into an annular guide groove at both ends in the diameter direction on the outer periphery. S, S
As a result, the state is sandwiched from both sides, so that there is no possibility that the rolls will come off the two-stage energization detection rolls 5, 5 and 5 ', 5'. Incidentally, since the detection mechanism joint portion W ₁ are the same as in FIGS. 1 to 6, the description thereof is omitted.

FIGS. 10A and 10B show an embodiment of the present invention, and FIG. 10A shows a straightening roll 2 comprising a pair of roll rows.
0 is a perspective view, and (B) is a front view thereof. That is, the straightening roll unit 20 includes a pair of left and right roller rows 20A and 20B.
On one roller row 20A, four sets of upper and lower two-stage correction rolls 21 and 21 are rotatably supported by a roll shaft 22, respectively, and are arranged at predetermined intervals on a mounting substrate 24. An annular guide groove S is formed between the straightening rolls 21 and 21 of the step by the interposition of the washer 23 as in FIG. Also, the other roller row 20B has a straightening roll 2 corresponding to the four sets of straightening rolls 21 and 21 described above.
1 ', 21' are arranged at predetermined intervals on a mounting substrate 24 'by a roll shaft 22', and upper and lower straightening rolls 21 ', 2
An annular guide groove S is formed between 1 'by a washer 23'.

Roller row 20A of straightening roll unit 20
And 20B are pressed against each other by urging means (not shown), and are arranged in a zigzag manner in which one two-stage straightening rolls 21, 21 and the other two-stage straightening rolls 21 ', 21' enter each other. . This arrangement is similar to the conventional example shown in FIG. 12, reference numeral 21 _1, 21 spring brush 25 between the straightening rolls and the mounting substrate 24 of the two-stage represented by ₁ is interposed bunk opposed Straightening roll 21 ₁ ′,
A spring brush 25 'is also interposed between 21 ₁ ' and its mounting board 24 '. Then, the mounting substrates 24, 2
4 'is connected to the power supply side and the ground side by lead wires 10 and 10', respectively.

According to the straightening roll unit 20 shown in FIG. 10, since each roll row is composed of two upper and lower straightening rolls 21, 21 or 21 ', 21' having an annular guide groove S, the electric wire W comes off. There is no fear, and the straightening rolls 21 ₁ , 21 ₁ and 21 ₁ ′, 21 ₁ ′ are used to provide an energization detection circuit as shown in FIG.
₁ can be detected.

FIG. 11 shows a modification of FIG. 10, in which spring washers 26, 26 'are used instead of washers 23, 23'.
The width of the annular guide groove S can be changed in accordance with the outer diameter of the electric wire W by tightening the bolt-shaped roll shafts 22 and 22 '. According to the embodiment shown in FIGS. 10 and 11, the joint detecting mechanism is provided by using the straightening roll unit in the electric wire feeder, so that there is no need to separately provide an energization detecting roll as in FIG. By modifying a part of the straightening roll unit, it is possible to avoid an increase in the size of the entire apparatus.

FIGS. 9 to 11 show the upper and lower two-stage energization detecting rolls 5 and 5, straightening rolls 21 and 21, and washers 18 and 2, respectively.
Although this is an example in which the annular guide groove S is formed by 3 or the spring washer 26, an annular guide groove having a groove width sufficiently smaller than the outer diameter of the core wire of the electric wire may be provided on the intermediate peripheral wall of one roll.

[0021]

As described above, the present invention relates to an electric wire feeder including a straightening roll unit composed of a pair of roll rows and a pair of feed rolls that rotate while sandwiching an electric wire. A means for applying a voltage between at least a pair of straightening rolls selected from a row, and a means for detecting the presence or absence of energization when an insulated wire or a joint thereof passes between the pair of straightening rolls. Therefore, it is possible to accurately detect the joint portion of the electric wire between the two electric wire drums and obtain information necessary for cutting the electric wire including the joint portion, thereby substantially manufacturing the terminal-equipped electric wire. This can be performed without interruption (claim 1).

Further, in addition to the above effects, since the joint detecting mechanism is formed on the straightening roll itself, it is not necessary to separately provide an energization detecting roll, and it is possible to avoid an increase in the size of the apparatus. Further, by providing the annular guide groove on the intermediate peripheral wall of each straightening roll of the roll row, the straightening of the straightening roll unit does not come off, and the straightening and supply of the wire are more reliably performed.

[Brief description of the drawings]

FIG. 1 is a reference plan view for explaining a device of the present invention.

FIG. 2 is a cross-sectional view of a main part of an energization detection roll portion of FIG.

FIG. 3 is a joint detection circuit of the apparatus of FIG. 1;

FIG. 4 is a plan view of the apparatus of FIG. 1 in an electric wire feeding state.

FIG. 5 is a plan view of the joint detection state.

FIG. 6 is a plan view showing a state in which an electric wire is missing.

FIG. 7 is a cross-sectional view of a main part of an energization detecting roll showing a second reference example for describing the present invention.

FIG. 8 is a sectional view of a main part of an energization detecting roll showing a third reference example for explaining the present invention.

FIG. 9 is a cross-sectional view of a main part of an energization detection roll showing a fourth reference example for explaining the present invention.

FIG. 10A is a perspective view of a straightening roll showing a first embodiment of the present invention, and FIG. 10B is a sectional view of a main part thereof.

FIG. 11 is a cross-sectional view of a main part of a straightening roll showing a second embodiment of the present invention.

FIG. 12 is an explanatory view of a conventional electric wire feeder.

[Description of Signs] W (Insulation-coated) electric wire W ₁ Joint section S Annular guide groove section 1, Straightening roll unit 3 Feed roll 5, 5 'Current detection roll 6, 6' Roll shaft 9 Spring 14 Detector 16, 17 Brush 18, 18 'washer 20 straightening roll unit 20A roll row 20B roll row 21, 21' straightening roll 23, 23 'washer 25, 25' spring brush 26, 26 'spring washer

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaaki Sawairi 206-1 Nunobikihara, Haibara-cho, Haibara-gun, Shizuoka Prefecture Inside Yazaki Parts Co., Ltd. ) Field surveyed (Int.Cl. ⁶ , DB name) H01B 13/00 B21F 23/00

Claims (2)

(57) [Claims] 1. An electric wire feeder comprising: a straightening roll unit composed of a pair of roll rows; and a pair of feed rolls that pinch and rotate an electric wire, wherein at least one pair of straightening rolls selected from the pair of roll rows. An electric wire having a joint detection mechanism, comprising: means for applying a voltage therebetween; and means for detecting the presence or absence of energization when the insulated wire or the joint thereof passes between the pair of straightening rolls. Feeder. 2. An annular guide groove having a width sufficiently smaller than an outer diameter of a core wire of an electric wire is provided in an intermediate peripheral wall of each straightening roll constituting the pair of roll rows in parallel with a supply direction of the electric wire. The electric wire feeder according to claim 1.