JP2970349B2 - Harness manufacturing apparatus and harness manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a harness manufacturing apparatus and a harness manufacturing method capable of performing an end treatment of an electric wire, and in particular, a skinning treatment of an intermediate region.

[0002]

2. Description of the Related Art FIGS. 17 and 18 are schematic side views showing the structure of a conventional harness manufacturing apparatus. The harness manufacturing apparatus is an apparatus for sequentially manufacturing a harness of a predetermined size in which terminals 10a are crimped at both ends by performing various processes described below on the electric wires 1 intermittently fed by the electric wire feeding device 2. In addition, an electric wire feeding device 2, a draw roller 6, a front clamp 7, a cutter group 8, and a rear clamp 9 are provided.

The wire feeder 2 is provided with a length measuring roller 3 and a feed roller 4 rotatably, and these two rollers 3, 4 are synchronized with each other in the same direction via a power transmission mechanism (not shown). And the same amount of rotation.

In the vicinity of the rollers 3 and 4, an electric wire 1 is provided.
Pressing device 5 for pressing the roller against each of the rollers 3 and 4 respectively.
The wire 1 is pressed against the circumference of the length measuring roller 3 and the feed roller 4 by the pressing roller 5b urged by the spring 5a, so that slippage or the like does not occur, and no error occurs in the feed amount of the wire. I have.

In FIGS. 17 and 18, the length measuring roller 3, the feed roller 4, the draw roller 6, the clamp 7,
A drive device for individually driving the cutter group 9 and the cutter group 8 and the like and a control device therefor are not shown.

[0006] The operation of the harness manufacturing apparatus thus configured will be described below. First, the electric wire 1 is pulled out from a stock reel (not shown), inserted between the length measuring roller 3 and the pressing roller 5b, further wrapped around a feed roller 4 and wound in an S-shape as a whole, and then a draw roller. 6, between the front-side clamps 7, between the cutter groups 8, and between the rear-side clamps 9.

In this state, the electric wire 1 is gripped by the clamps 7 and 9 and the cutter group 8 is closed synchronously. As a result, the electric wire 1 is cut by the cutting cutter 8a at the center of the cutter group 8, and the outer peripheral coating portion of the electric wire 1 is cut by the cutting cutters 8b on both sides thereof. Further, in the cut state, the electric wire 1 on the remaining side (hereinafter referred to as “residual electric wire 1”) is moved by the movement of the front side clamp 7.
Is moved in the direction of arrow Q to strip off the coating at the end of the residual electric wire 1, and the rear side clamp 9 is moved in the direction of arrow P to An end portion of the gripped electric wire 1 (hereinafter referred to as “cut electric wire 1”) is peeled off.

Subsequently, the residual electric wire 1 moves together with the front side clamp 7 in a direction perpendicular to the paper surface of FIG. 17, and a terminal 10a is crimped to the stripped end of the residual electric wire 1 by a terminal crimping machine (not shown). The side clamp 7 returns to the original position (see FIG. 18).

On the other hand, the rear-side clamp 9
Of the cut electric wire 1 by a terminal crimping machine (not shown).
After that, the cut electric wire 1 is discharged to a predetermined discharge position, and returns to the original position.

Then, as shown in FIG. 18, both clamps 7 and 9 are opened, the length measuring roller 3 and the feeding roller 4 are driven to rotate, and the electric wire 1 is fed to the draw roller 6 side. At the same time, the delivery of the wire and the delay
The wire 6 is driven to rotate, and the electric wire 1 is sent to the rear clamp 9 as shown in FIG.

Thereafter, the above-mentioned cutting and crimping operations are repeated, and cut wires (harnesses) having the terminals 10a crimped at both ends are sequentially manufactured.

Thus, one cycle is completed, and by repeating this cycle, harnesses are sequentially manufactured.

[0013]

In the above-described harness manufacturing apparatus, the length of the length measuring roller 3 is rotated by a predetermined amount and the wire 1 is fed to determine the wire size. In order to maintain the electric wire 1, it is necessary to press the electric wire 1 against the length measuring roller 3 with the pressing roller 5b of the pressing device 5 so as to prevent the electric wire 1 from slipping on the length measuring roller 3.

However, the electric wire 1 supplied to the harness manufacturing apparatus is exposed to a portion where the core is exposed by removing the covering portion at a predetermined location by another intermediate stripping device or manually (hereinafter referred to as "intermediate stripping portion"). "), A step is formed in the electric wire 1 wound around the length measuring roller 3, and as shown in FIG. 19, the pressing roller 5a strongly presses the exposed core wire 1a at the intermediate stripped portion. Resulting in damage. In particular, a high degree of safety is required for a harness used for an electrical component such as an automobile, and it is not desirable that the core wire 1a be slightly damaged.

The present invention solves the above-mentioned problems,
An object of the present invention is to provide a harness manufacturing apparatus and a harness manufacturing method capable of manufacturing a harness having an intermediate peeled portion with stable quality with a simple configuration.

[0016]

To achieve the above object, a harness manufacturing apparatus according to claim 1 for manufacturing a harness in which a covering portion is peeled off at a predetermined location in an intermediate region of a cutting electrode. An electric wire feeding mechanism for intermittently feeding an electric wire by a predetermined amount along a longitudinal direction thereof, and an electric wire feeding mechanism disposed upstream of an electric wire feeding direction of the electric wire feeding mechanism, and an intermediate region of the electric wire. An intermediate peeling mechanism for peeling off a covering portion at a predetermined position, and an electric wire arranged downstream of the electric wire feeding mechanism with respect to the electric wire feeding direction, for cutting and processing the electric wire sent from the electric wire feeding mechanism. An end processing mechanism, wherein the wire supply mechanism has a length measuring roller, and at least two pressing rollers for pressing the covering portion of the electric wire around the length measuring roller; To the surveying roller The amount of movement is restricted to the extent that the outer periphery of the pressing roller does not contact the core wire coating portion stripped portion of the wire.

According to a second aspect of the present invention, in the harness manufacturing apparatus, the pressing roller according to the first aspect includes a sensor for measuring an amount of movement of the pressing roller in the direction of the length measuring roller, and the pressing roller is determined by a measured value of the sensor. The radius of curvature of the center of the core of the electric wire wound around the length measuring roller is determined based on the diameter of the electric wire and the diameter of the length measuring roller, and the radius of curvature and the number of rotations of the length measuring roller are determined. The feed amount of the electric wire is controlled.

According to a third aspect of the present invention, there is provided a harness manufacturing apparatus.
The distance between the electric wire pressing portions of the pressing roller is different from the distance between predetermined portions where the covering portion is peeled off.

According to a fourth aspect of the present invention, there is provided a harness manufacturing method comprising: a first step of intermittently feeding a predetermined amount of a wire along a longitudinal direction thereof by a wire feeding mechanism having a length measuring roller; In the feeding stop period of the process, the intermediate peeling mechanism arranged on the upstream side of the wire feeding mechanism with respect to the wire feeding direction peels off a coating portion at a predetermined portion of the intermediate region.
And during the feed stop period of the first step, the wire is sent out from the wire feeding mechanism by a wire end processing mechanism arranged downstream with respect to the wire feeding direction of the wire feeding mechanism. And a third step of cutting the cut wire.
By performing the second and / or the third step each time the electric wire is intermittently fed by a predetermined amount in the first step, the covering portion at a predetermined position in the intermediate region is provided. Wherein the wire feeding mechanism further comprises at least two pressing rollers, and the amount of movement of each pressing roller in the direction of the length measuring roller is determined by the pressing roller. The pressing roller presses the wire against the circumference of the length measuring roller while regulating the outer periphery of the wire so as not to contact the core wire of the stripped predetermined portion of the wire.

[0020]

According to the first and fourth aspects of the present invention, the electric wire from which the covering portion of the intermediate area is peeled off by the intermediate peeling mechanism is intermittently moved by a predetermined amount by the electric wire feeding mechanism. It is sent to the processing mechanism and cut and processed. The electric wire feeding mechanism has a length measuring roller and at least two pressing rollers for pressing a covering portion of the electric wire around the measuring roller, and a moving amount of each pressing roller to the measuring roller. Is regulated to such an extent that the covering portion does not come into contact with the exposed core wire, so that the core wire is not damaged. Also,
Since there are two or more pressing rollers, even if an intermediate peeling part comes to the pressing part of a certain pressing roller, the other pressing roller can press the covering part of the electric wire, thereby reducing the slip between the electric wire and the measuring roller. The wire is reliably fed by a desired amount by following the rotation of the length measuring roller.

According to the second aspect of the present invention, the amount of movement of the pressing roller is measured by a sensor, thereby obtaining the wire diameter of the electric wire, and the wire is wound around the length measuring roller based on the wire diameter and the diameter of the length measuring roller. The radius of curvature of the center of the core portion of the wrapped electric wire is determined. Since the wire feed amount is defined by the radius of curvature and the number of rotations of the length measuring roller, it is possible to accurately control the wire feed amount.

According to the third aspect of the present invention, even if there are a plurality of intermediate stripped portions in a short section of the electric wire, the mutual interval between the electric wire pressing portions of the pressing roller is determined by peeling the covering portion. Is set differently from the predetermined location, so that the pressing portions of the plurality of pressing rollers are not located at the same time in the core portion where the skin is peeled off, and any of the pressing rollers surely covers the electric wire. By pressing the section, the feed rate of the electric wire can be accurately controlled.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings, but this does not limit the technical scope of the present invention.

<Configuration of Harness Manufacturing Apparatus> First, the overall configuration of the harness manufacturing apparatus according to the present invention will be described. FIG. 1 is a schematic plan view of a harness manufacturing apparatus according to an embodiment of the present invention, FIG. 2 is a schematic side view of the harness manufacturing apparatus, and FIG. 3 is a harness 10 manufactured by the harness manufacturing apparatus. It is a figure showing the example of.

As shown in FIG. 1 and FIG. 2, the harness manufacturing apparatus according to the present invention is arranged along an electric wire arrangement line X (FIG. 1).
Straightener 11, intermediate peeling mechanism 12, wire path length adjusting mechanism 13, wire feeding mechanism 14, wire guide mechanism 15,
A draw roller 16, a front clamp 17, a cutter mechanism 18, and a rear clamp 19 are arranged in this order, and terminal crimping mechanisms 20, 21 are arranged on both sides of the cutter mechanism 18. Is controlled by a control device (not shown).

The electric wire 1 is subjected to various treatments by the harness manufacturing apparatus arranged as described above, and finally the electric wire 1 shown in FIG.
As shown in FIG. 6, the terminals 10a are crimped to both ends, and the outer peripheral covering portion of the intermediate stripping portion 10b is peeled off, so that the harness 10 in which the core wire 1a is exposed to the outside is sequentially manufactured.

Hereinafter, the configuration of each part of the harness manufacturing apparatus will be described. The straightener 11 is connected to the electric wire arrangement line X
A plurality of rollers 111 are arranged vertically above and below, and the electric wire 1 drawn from a stock reel (not shown) passes between the plurality of rollers 111 to correct the curl. It has become.

The intermediate peeling mechanism 12 is driven by a driving means such as a cylinder 122a to hold and release the electric wire 1 on the electric wire arranging line X, and a pair of clamps 122 for cutting the outer peripheral coating portion of the electric wire 1. And a cutter 121. This cutter 121 has a cylinder 121a.
It is configured to be driven to open and close by driving means including the above, and to be movable along the electric wire arrangement line X.

The wire path length adjusting mechanism 13 is provided for adjusting the wire path length from the intermediate peeling mechanism 12 to a cutter mechanism 18 described later, and is formed by dividing a substantially circular reel into two vertically. The electric wire 1 is hung on a number of small bearings (not shown) provided along the outer periphery of each of the upper reel 131 and the lower reel 132 so as to be smoothly fed. I have.

The upper reel 131 can be moved up and down by a driving device (not shown), and the distance between the upper reel 131 and the lower reel 132 is variable.
The wire path length from the intermediate peeling mechanism 12 to the cutter mechanism 18 described later can be set to an appropriate length.

In addition, at the intersection 133 where the electric wire 1 introduced into the electric wire path length adjusting mechanism 13 and the electric wire 1 derived from the electric wire path length adjusting mechanism 13 intersect, the lower reel is connected so that the electric wires 1 do not contact each other. Introductory reel 1 out of 132
32a has a slightly smaller radius than the lead-out reel 132b, and its wire introduction surface has a lead-out reel 132b.
The wire 1 is set to be slightly closer to the paper surface than the lead-out surface of the wire in b, and the wires 1 are configured to three-dimensionally intersect at the intersection 133.

The lower reel 13 of the upper reel 131
The distance from the wire harness 10 is L1 (see FIG. 3), and the dimension from the wire end of the harness 10 to one end of the intermediate peeling area of the harness 10 (hereinafter referred to as “intermediate L2) and an electric wire arranging line X from a cutting position M by the intermediate peeling cutter 121 to a cutting position E by the cutting cutter 181.
When the distance along the line (the wire disposition distance) is L3 (see FIG. 1), L3 = nL1 + L2 (n = 0, 1, 2, 3,...)
..) Are determined so that the upper reel 131 is positioned. In FIG. 4, the relationship between the cutting position E and the cutting position M when n = 5 is shown as an example, and the intermediate peeling portion is shown as being covered for convenience. For easy understanding, the cutting position E and the cutting position M are numbered in order from the one closest to the cutter mechanism 18, and E1 to E6.
Indicates the planned cutting position of the cutter 181, and M1 to M6 indicate the cutting positions of the cutter 121 in the intermediate peeling mechanism 12 in order.

Thus, when the cut position En of the electric wire 1 is arranged corresponding to the tip of the cutting cutter 181, one end of the intermediate stripping region of the electric wire 1 (the cutting position M (n
+5)) is disposed corresponding to the tip of the intermediate peeling cutter 121, so that the cutting operation and the intermediate peeling operation can be performed at the same time, and it is necessary to provide an electric wire feeding step therebetween. Since there is no harness, the efficiency of harness production can be improved.

The electric wire feeding mechanism 14 is provided with a rotatable length measuring roller 141 and a feed roller 142, respectively.
In a state of being bridged in a character shape, by driving means (not shown),
When the rollers 141 and 142 are rotationally driven, the electric wire 1 is fed in a direction indicated by an arrow P (hereinafter referred to as an “electric wire feeding direction P”) along the longitudinal direction (the electric wire arrangement line X in FIG. 1). It has become.

At this time, the circumference of the length measuring roller 141 and the electric wire 1
A pressure contact device 143 is provided so that no slippage occurs between them. FIG. 5 is a plan view showing a specific configuration of the press-contact device 143, FIG. 6 is a cross-sectional view taken along line II in FIG.
FIG. 7 is a sectional view taken along line II-II in FIG. The two holding rollers 143a and 143b are used to hold the holding member 143c.
And is rotatably held by the holding member 143c.
Is a groove 143e formed in the base plate 143d (FIG. 6).
And is slidably fitted to the measuring roller 141 so as to be restricted and movable only in the direction of the center T of the length measuring roller 141.

An air cylinder 143g is attached to the L bracket 143f fixed to the base plate 143d, and urges the holding member 143c in the center T direction of the length measuring roller 141 with a constant force via the bracket 143h. It is configured as follows. The pressing rollers 143a and 143b are mounted symmetrically with respect to the moving direction of the holding member 143c (the direction of the center T of the length measuring roller 141), and the rotation center T
1 and T2 are disposed so as to be equidistant from the center T of the length measuring roller 141 (see FIG. 8).

According to such a configuration, even if the intermediate stripped portion 1b of the electric wire 1 comes to the position of the pressing portion of one of the pressing rollers (the pressing roller 143b in FIG. 8) as shown in FIG. One holding roller (143a) abuts on the covering portion of the electric wire 1 and the moving direction of the holding member 143 is restricted only in the direction of the center T of the length measuring roller 141, so that the length measuring roller 141 of the holding roller 143b. The movement in the direction is also restricted and does not contact the core wire 1a.

In this manner, the other pressing roller 143a
(142b), the other pressing roller 143b
Since the movement amount of (143a) is restricted to such a degree as not to contact the core wire 1a, the core wire 1a is prevented from being damaged by the urging force of the pressing roller.

However, there are a plurality of intermediate stripping portions 1b in a short section, and the interval between the adjacent intermediate stripping portions 1b is substantially equal to the interval between the contact portions between the pressing rollers 143a, 143b and the length measuring roller 141. In the same case, presser roller 1
43a, 143b may simultaneously press the intermediate peeling portion 1b. In this case, the regulation does not work, and the pressing rollers 143a, 143b simultaneously urge the core wire 1a to be damaged. In this case, the pressing roller 143
a, 143b and the electric wire 1 between the abutting portions A (in FIG. 9, the length of the arc connecting the pressing contacts B, C of the pressing rollers 143a, 143b), and sandwiched between two adjacent intermediate peeling portions 1b. The length L of the covering portion needs to be set differently, and it is more preferable that L ≧ A + α (α> 0).

However, when three or more pressing rollers are provided, it is rare that three intermediate peeling portions are usually provided within a short section of one harness. In this case, as described above, It is considered that there is no need to particularly restrict the distance between the pressing roller and the contact portion with the length measuring roller.

Further, regulating means are provided for holding the pressing rollers 143a and 143b on independent holding members and for restricting the amount of movement of each holding member so as not to contact the core wire 1a of the intermediate peeling portion 1b. You may put it.

In FIG. 6, reference numeral 141a denotes a drive shaft of the length measuring roller 141, and the length measuring roller 141 is rotationally driven by a drive motor (not shown).

The wire feed amount Lr by the length measuring roller 141
Is obtained by the following equation (1), where r is the radius of curvature of the core portion of the electric wire 1 wound around the length measuring roller 141 (see FIG. 8), and x is the number of rotations of the length measuring roller 141.

Lr = 2πr × x (1) When the radius of the length measuring roller 141 is R and the wire diameter of the electric wire 1 is D, the curvature radius r is usually r = R + D / 2.
It is represented by By substituting this equation into the above equation (1), the number of rotations x for the desired wire feed amount Lr can be obtained, whereby the wire feed amount is controlled.

However, actually, the pressing rollers 143a, 143a, 1
Deformation of the covering part due to the bias of 43b, feeding speed, electric wire 1
Diameter D during feeding depending on various conditions such as the type of
Slightly changes, and the feed amount Lr changes accordingly. In order to realize high-precision electric wire feeding, it is conceivable to measure the value of the changed wire diameter D and input it to the control device each time by an operator.
The electric wire 1 being fed is complicatedly deformed, and it is difficult to measure it manually. Therefore, in the present embodiment, the pressing device 143
Provided with a sensor for detecting the amount of displacement of the holding member 143c,
Thereby, the diameter D of the electric wire 1 is measured to control the feed amount.

That is, the eddy current type displacement sensor 143 is provided on the back surface of the base plate 143d via the sensor holding plate 143i.
j (FIG. 6), and a metal detection object 143m is attached to the holding member 143c so as to face the sensor head 143k. In FIG. 7, only the position of the sensor head 143k is indicated by a broken line for convenience.

With the movement of the holding member 143c in the direction of the length measuring roller 141, the object to be detected 143m approaches and separates from the sensor head 143k.
j, the length measuring roller 40 of the pressing rollers 143a and 143b.
A signal corresponding to the amount of separation to 2 is output to a control device (not shown).

The output of the sensor 143j is adjusted by first adjusting the output so that the separation amount becomes zero in a state where the pressing rollers 143a and 143b are in contact with the length measuring roller 141, and then moving the holding member 143c. This is done by measuring the movement amount with a gauge and adjusting the output of the sensor 143j at that time to be equal to the measured value of the gauge. Now, as shown in FIG.
When pressed by the press roller 143a in a state of being wrapped around 41, the output of the sensor 143j is D ', and the press contact B (or press contact C) at that time and the length measuring roller 141
Assuming that an angle between a straight line connecting the centers T of the holding members 143c and the center line of the holding member 143c is θ, as can be inferred from the partially enlarged view of FIG. Almost D
= COSθ · D ′. Of course the θ
May vary in a minute range depending on the diameter of the electric wire 1, but the change is almost negligible because the diameter of the length measuring roller 141 is larger than the diameter of the electric wire 1. Can be considered almost constant. Therefore, the wire diameter D of the electric wire 1 can be easily obtained by detecting only the movement amount D 'of the pressing rollers 143a and 143b.

Therefore, when the feeding of the wire 1 is stopped, the wire diameter determined by the measurement value of the sensor 143j is set to Ds, and then the wire is determined during the preliminary operation to feed the wire 1 by a predetermined amount. Assuming that the diameter is Dm, there is generally a relationship of Dm> Ds. From these values, the radius of curvature r of the center of the core portion of the electric wire 1 is obtained based on the following empirical formula (2).

R = R + Ds− (Dm / 2) + k (2)

K is a constant obtained from the experimental data, and the radius of curvature r obtained based on this experimental formula (2)
Is a value very similar to the radius of curvature of the electric wire 1 at the time of actual feeding, and based on the value of the radius of curvature r, the above (1)
By determining the number of revolutions x of the length measuring roller 141 by the formula, the feeding accuracy of the electric wire 1 can be improved.

According to the configuration of the electric wire feeding mechanism 14, the diameter of the electric wire 1 to be fed is automatically measured,
Since optimal feed control can be performed, manual adjustment is not required even when processing electric wires 1 having different wire diameters and types, and work efficiency can be improved.

In order to measure the diameter of the electric wire 1,
As described above, the pressing roller 143 is controlled by the sensor 143j.
a, a method of measuring the amount of movement of the 143b, a method of providing another displacement detector around the length measuring roller 141, directly contacting the contact with the electric wire 1, and detecting a wire diameter based on the amount of displacement. Although it is conceivable, there is an advantage that the configuration becomes easy by measuring the displacement amount of the press roller as described above.

The pressing rollers 143a. 143b is
Since the air cylinder 143g is urged toward the length measuring roller 141 side, a constant pressing force can be secured all the time regardless of the wire diameter, and the pressing rollers 143a and 143b can be secured.
The pressing force adjustment operation can be omitted, and the preparation operation when changing the electric wire is further facilitated.

The pressing device 144 of the feed roller 142 has the same structure as the pressing device 143. However, when the feeding force of the length measuring roller 141 is sufficient,
Since the function of the feed roller can also be used by itself, the pressing device 144 and the feed roller 142 can be omitted, and are not necessarily essential in the present invention.

Returning to FIG. 2, the electric wire guide mechanism 15 is provided with two guide rollers 1 at an interval above the main body 153 thereof.
51 and 152 are rotatably mounted. Then, the electric wire 1 sent from the electric wire feeding mechanism 14 is slackened between the two guide rollers 151 and 152.
Is made to wait until it is fed by a draw roller 16 described later.

The pair of draw rollers 16 are configured to be able to be driven toward and away from each other so as to be able to hold the electric wire 1 on the electric wire arranging line X (FIG. 1). The electric wire 1 is configured to be sent out in the electric wire feeding direction P by being rotationally driven in opposite directions by a driving means that does not.

The front clamp 17 is configured to be able to grip and release the electric wire 1 on the electric wire arrangement line X and to be able to move freely in a horizontal plane including the electric wire arrangement line X by a driving means (not shown). It is configured.

The cutter mechanism 18 has an electric wire arranging line X
A pair of cutting cutters 181 for cutting the upper electric wire 1
And a pair of cutting cutters 182 and 182 that are respectively arranged on both front and rear sides of the cutting cutter 181 and cut the covering portion of the outer periphery of the electric wire 1. Further, the cutter mechanism 18 is configured such that the respective cutters 181 and 182 are opened and closed in synchronization with each other by a driving unit (not shown).

The rear clamp 19 is configured to be able to grip and release the electric wire 1 on the electric wire arrangement line X, and is freely moved in a horizontal plane including the electric wire arrangement line X by a driving means (not shown). It is configured to be able to.

The front end clamp 17, the cutter mechanism 18, the rear side clamp 19, and the terminal crimping mechanisms 20, 21 (FIG. 1) disposed on the left and right of the above constitute a wire end processing mechanism. .

<Operation of Harness Manufacturing Apparatus> Next, the operation of the above-described harness manufacturing apparatus will be described with reference to the timing chart of FIG.

(1) First, the electric wire 1 before starting the operation
Is set in a state where the electric wire 1 is pulled out from a stock reel (not shown) and a plurality of rollers 111 of the straightener 11 are pulled out.
After passing through, a pair of cutters 12 of the intermediate peeling mechanism 12
1 and between the clamps 122. Furthermore, after winding around the upper and lower reels 131 and 132 of the electric wire path length adjusting mechanism 13, it is wound around the length measuring roller 141 and the feed roller 142 in an S shape. Further, it passes over the two guide rollers 151 and 152 of the electric wire guide mechanism 15 and passes between the pair of draw rollers 16 and the front side clamp 17, and finally, the cutters 18 of the cutter mechanism 18.
1 and 182 and between the rear clamps 19. At this time, the clamp 122 of the intermediate peeling mechanism 12 and the clamps 17 and 19 of the electric wire end processing mechanism are in a state where the gripping of the electric wire 1 is released, respectively, and the pair of draw rollers 16 are separated from each other. As shown by the imaginary line, the electric wire 1 is released from being pinched.

Also, as described above, the wire path length adjusting mechanism 1
3 is a cutting position M6 of the intermediate peeling cutter 121.
When the distance along the electric wire arrangement line X (the electric wire arrangement distance) at the cutting position E1 by the cutting cutter 181 is L3 (see FIG. 1), L3 = nL1 + L2 (n = 0, 1,
(2, 3,...) (See FIG. 3)
The position of the upper reel 131 is set.

(2) In this state, when an operation start command is given to a control device (not shown), time t0 to t0 in FIG.
As shown at t1, after the electric wire 1 is gripped by the front clamp 17 and the rear clamp 19, respectively, the cutting cutter 181 and the cutting cutter 182 are closed in synchronization as shown in FIG. The cutting is performed by the cutting cutter 181 at the scheduled cutting position, and the covering portions on the outer periphery of the electric wire 1 are cut by the cutting cutter 182 on both sides of the cutting position. Further, in this cut state, as shown in FIG. 12, the front side clamp 17 moves in the direction Q opposite to the electric wire feeding direction P, and the electric wire 1 gripped by the clamp 17 (hereinafter referred to as “residual electric wire 1”). The covering portion at the end on the downstream side in the wire feeding direction P in FIG. Further, in parallel with this operation, the rear clamp 19 moves in the direction of arrow P, and the electric wire 1 (hereinafter referred to as “cut electric wire 1”) gripped by the clamp 19 is located on the upstream side with respect to the electric wire feeding direction P. The coating on the end is peeled off (cutting and peeling off the end).

(3) Next, at time t 1, as shown in FIG. 13, the electric wire 1 by the length measuring roller 141 and the feed roller 142
Is started, and the terminal crimping process is performed at times t1 to t2 in parallel with the feeding. That is, the front side clamp 17 holding the residual electric wire 1
Moves toward the terminal crimping mechanism 20 to the right as shown by the arrow R in FIG. 1, and the terminal 10 a is crimped to the stripped end of the residual electric wire 1 by the terminal crimping mechanism 20. Thereafter, the front-side clamp 17 moves toward the left direction S, and the residual electric wire 1 is again arranged on the electric wire arrangement line X. In parallel with this operation, the rear clamp 19 moves in the leftward direction S toward the terminal crimping mechanism 21, and the terminal 1 is placed on the stripped end of the cut electric wire 1.
0a is crimped. Thereafter, the rear clamp 19 releases the grip on the cut electric wire 1 and discharges it to a predetermined discharge location, and returns to the original position on the electric wire arrangement line X. During this terminal crimping process, the electric wire 1 sent out by the electric wire feeding mechanism 14 forms a slack between the guide rollers 151 and 152 of the electric wire guide mechanism 15, and the residual electric wire 1
Is allowed to move in the left-right direction.

(4) At time t2 when the terminal crimping / discharging processing is completed, the gripping of the electric wire 1 by the front side clamp 17 is released as shown in FIG. It is pinched and driven to rotate, whereby the supply of the residual electric wire 1 by the draw roller 16 is started.

Subsequently, at time t3, time t1 to time t1
By feeding the electric wire 1 by the electric wire feeding mechanism 14 during t3,
When the wire 1 is fed by an amount corresponding to the cutting dimension L1,
The feeding of the electric wire 1 by the electric wire feeding mechanism 14 is stopped. In this way, the wire 1 is fed by the wire feed mechanism 14 by the cutting dimension, so that the cutter 1
One end of the next intermediate stripping area of the electric wire 1 is arranged corresponding to the tip end of the electric wire 21.

(5) Also, from time t3 immediately after the completion of the wire feeding to time t4, the intermediate peeling mechanism 12 waits for operation preparation (standby time tw), and the intermediate peeling process starts at time t4. Is done. That is, as shown in FIG. 15, after the electric wire 1 is gripped by the clamp 122 of the intermediate peeling mechanism 12, the cutter 121 is closed, and the outer periphery of the covering portion on one end side of the intermediate peeling region is cut by the cutter 121.

Then, in the cut state, as shown in FIG. 16, the cutter 121 moves in the direction of arrow Q toward the other end of the intermediate peeling area, whereby the covering portion of the intermediate peeling area is moved to one end. The side is cut off from the rest of the covering and compressed to the other end, and the covering in the intermediate skinning area is peeled off. Thus, the intermediate peeling process is completed (time t5).

(6) At time t6, time t2 to t
When the wire 1 is fed by an amount corresponding to the cutting dimension L1 by the feeding of the wire 1 by the draw rollers 16 between the six rollers 6, the pair of draw rollers 16 stop rotating and are separated from each other. 1 is completed (see FIG. 2).
Thereby, the slack of the electric wire 1 formed between the two guide rollers 151 and 152 of the electric wire guide mechanism 15 disappears. In this way, the electric wire 1 is fed from the front side clamp 17 toward the rear side clamp 19 by the cutting dimension, whereby the cutting cutter 181 of the cutter mechanism 18 is cut.
The next scheduled cutting position of the electric wire 1 will be arranged correspondingly at the tip position of.

Thus, one cycle of the operation is completed, and thereafter, the above operation is repeatedly performed, and the terminal 1 is connected to both ends.
The harnesses 10a are crimped, and the harnesses 10 in which the covering portion of the intermediate region 10b is peeled off are sequentially manufactured.

According to such a harness manufacturing apparatus, an electric wire path length adjusting mechanism 13 which can freely set an electric wire path length between the electric wire feeding mechanism 14 and the intermediate peeling mechanism 12 is provided.
Is arranged, and the intermediate peeling cutter 121 is moved from the cutting position of the cutting cutter 181 by the electric wire path length adjusting mechanism 13.
Since the wire path length is set so that the arrangement distance L3 of the electric wire 1 to the cutting position of the electric wire 1 is equal to the sum of the integral multiple of the cutting dimension L1 of the electric wire 1 and the intermediate peeling position L2, one cycle The wire 1 is fed by the wire feeding mechanism 14 (and the draw roller 16) once in accordance with the cutting dimension (L1), and the wire 1 is positioned on the cutting cutter 181 and used for intermediate peeling. Positioning with respect to the cutter 121 can be set at the same time. For this reason, the number of times of feeding and stopping of the wire feeding mechanism 14 only needs to be one in one cycle, so that the number of man-hours is reduced, and the time from when the wire feeding mechanism 14 is stopped until the next processing is started is reduced. The standby time tw can be reduced to one, so that the time required for one cycle can be reduced and the harness 10 can be manufactured efficiently.

Further, in the electric wire feeding mechanism 14, two pressing rollers 143 are arranged in the center direction of the length measuring roll 141.
a, 143b are urged in parallel, and when one pressing roller comes into contact with the covering portion of the electric wire 1, the other pressing roller does not move further in the direction of the length measuring roll 141. Therefore, the core wire in the intermediate peeling portion is not damaged by the bias of the pressing roller.

Further, since a series of these operations are automatically performed, the quality is stabilized, and the wire transport operation between the intermediate delamination process and the end process is not required, and the number of processes can be reduced.

In the above-described embodiment, in the intermediate stripping process, the cutter 121 is cut into the front part (cutting position M) of the covering portion in the intermediate stripping region of the electric wire 1, and the cutter 121 is moved in the Q direction. The cutter 121 is provided at the rear of the covering portion in the intermediate peeling area.
May be cut and moved in the P direction to perform an intermediate peeling process.

Further, a cut is made along the direction of the electric wire 1 in a covering portion of the electric wire 1 in the intermediate peeling region, and the covering portion of the electric wire 1 is cut into a circle at both ends of the cut by a cutter to completely cover the covering. May be removed.

Further, the wire path length adjusting mechanism 13 does not necessarily need to be disposed between the intermediate stripping mechanism 12 and the wire feeding mechanism 14, and the intermediate stripping mechanism 12 and the cutter mechanism 18 are not required.
(Electric wire end processing mechanism), and may be omitted by frequently performing the feeding operation of the electric wire 1.

When a plurality of intermediate stripping portions are formed for one harness, a plurality of intermediate stripping mechanisms are arranged along the wire arrangement line X, and a plurality of wire path length adjusting mechanisms are provided. By arranging them between the intermediate peeling mechanisms, the wire is fed once by the feed roller during one cycle, and the positioning of the cutter mechanism to the cutting cutter and the positioning of each intermediate peeling mechanism to the cutter are possible. Can be done simultaneously.

Further, a marking mechanism may be provided along the electric wire arrangement line X to provide an identification mark on the outer surface of the electric wire 1.

[0081]

As described above, according to the first aspect of the present invention, the wire feeding mechanism for intermittently feeding the wire by a predetermined amount comprises the length measuring roller and at least two wires for pressing the wire against the length measuring roller. And a plurality of rollers, each of which is regulated such that an amount of movement in the direction of the surveying roller does not contact an outer periphery of the pressing roller with a core wire at a predetermined location where the covering portion of the electric wire is peeled off. Therefore, there is no possibility of damage due to contact with the core wire in the peeling area formed by the intermediate peeling mechanism. In addition, since there are two or more pressing rollers, even if an intermediate peeling portion comes to the pressing portion of a certain pressing roller, another pressing roller can press the covering portion of the electric wire, and thereby, the distance between the electric wire and the length measuring roller can be increased. It is possible to reliably feed a desired amount of the wire by preventing the slip and following the rotation of the length measuring roller by preventing the slip. Thereby, the dimensional accuracy of the manufactured harness can be maintained without damaging the core wire of the peeled portion.

According to the second aspect of the present invention, the amount of movement of the press roller is measured by the sensor, thereby obtaining the wire diameter of the electric wire, and the wire is wound around the length measuring roller based on the wire diameter and the diameter of the length measuring roller. The radius of curvature of the center of the core portion of the wrapped electric wire is determined. Since the wire feed amount is controlled by controlling the rotation speed of the length measuring roller based on the radius of curvature, slippage between the length measuring roller and the wire wound therearound is prevented, and the feeding process is performed. High-precision electric wire feeding regardless of wire diameter and type.

According to the third aspect of the present invention, even if there are a plurality of intermediate stripped portions in a short section of the electric wire, the interval between the wire pressing portions of the pressing roller is different from the interval between the adjacent intermediate stripped portions. Therefore, one of the pressing rollers always presses the covering part of the electric wire, and all the pressing rollers are simultaneously located in the stripped area of the electric wire, causing a slippage between the length measuring roller and the electric wire, There will be no error in feeding.

According to the fourth aspect of the present invention, the length of the length measuring roller and the moving amount in the direction of the measuring roller do not come into contact with the core wire at a predetermined position where the outer periphery of the pressing roller is stripped of the covering portion of the electric wire. While being regulated to a degree, the wire is intermittently moved by a predetermined amount along the longitudinal direction of the wire by a wire feeding mechanism having at least two pressing rollers for pressing the covering portion of the wire around the length measuring roller. To produce the harness, the same effect as the first aspect of the invention can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan layout view schematically illustrating a harness manufacturing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic side view of the harness manufacturing apparatus of FIG.

FIG. 3 is a diagram showing a harness manufactured by the harness manufacturing apparatus of FIG.

FIG. 4 is a conceptual diagram for explaining a method of setting a wire path length in the harness manufacturing apparatus of FIG.

FIG. 5 is a plan view showing a configuration of a pressure contact device in a length measuring roller.

FIG. 6 is a vertical sectional view taken along line II of the pressure welding device of FIG. 5;

FIG. 7 is a longitudinal sectional view taken along line II-II in the pressure welding device of FIG.

FIG. 8 is a diagram illustrating a state in which the amount of movement of a pressing roller is regulated by the pressing device of FIG. 5;

FIG. 9 is an enlarged view for explaining a relationship between a movement amount of a pressing roller and a wire diameter of an electric wire.

FIG. 10 is a time chart for explaining an operation of the harness manufacturing apparatus of FIG. 1;

FIG. 11 is a diagram illustrating an electric wire cutting process in the harness manufacturing apparatus of FIG.

FIG. 12 is a diagram illustrating an electric wire cutting process in the harness manufacturing apparatus of FIG.

FIG. 13 is a side view for explaining the operation of the harness manufacturing apparatus of FIG.

FIG. 14 is a side view for explaining the operation of the harness manufacturing apparatus of FIG.

FIG. 15 is a view for explaining an operation of an intermediate peeling process in the harness manufacturing apparatus of FIG. 1;

FIG. 16 is a view for explaining an operation of an intermediate peeling process in the harness manufacturing apparatus of FIG. 1;

FIG. 17 is a schematic side view showing the configuration and operation of a conventional harness manufacturing apparatus.

FIG. 18 is a schematic side view for explaining the operation of the harness manufacturing device of FIG.

19 is a schematic diagram showing a relationship between a length measuring roller and a pressing roller in the harness manufacturing apparatus of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric wire 10 Harness 12 Intermediate peeling mechanism 13 Electric wire path length adjusting mechanism 14 Electric wire feeding mechanism 16 Front side clamp 18 Cutter mechanism 19 Rear side clamp 141 Length measuring roller 143, 144 Pressure contact device 143a, 143b Pressing roller P Electric wire feeding direction

Claims (4)

(57) [Claims] 1. A harness manufacturing apparatus for manufacturing a harness in which a covering portion is stripped at a predetermined location in an intermediate region of a cutting electrode, wherein the wire is intermittently fed by a predetermined amount along a longitudinal direction thereof. An electric wire feeding mechanism, an intermediate peeling mechanism that is disposed upstream with respect to the electric wire feeding direction of the electric wire feeding mechanism, and peels off a covering portion of a predetermined portion of an intermediate region of the electric wire; An electric wire end processing mechanism that is disposed downstream with respect to the electric wire feeding direction and that cuts and processes the electric wire sent from the electric wire feeding mechanism, the electric wire feeding mechanism includes a length measuring roller, At least two pressing rollers for pressing the electric wire around the length measuring roller, wherein the amount of movement of the pressing roller in the direction of the measuring roller is such that the outer periphery of the pressing roller peels off the covering portion of the electric wire. To the core of the part Harness manufacturing apparatus characterized by being regulated so as not to touch. 2. A sensor for measuring an amount of movement of the pressing roller in the direction of the length measuring roller, wherein a wire diameter of the electric wire determined by a measured value of the sensor and a diameter of the length measuring roller are provided. A radius of curvature at the center of the core of the electric wire wound around the length measuring roller is obtained based on the radius of curvature and the number of rotations of the length measuring roller to control the feed amount of the electric wire. The harness manufacturing apparatus according to claim 1, wherein 3. The harness manufacturing apparatus according to claim 1, wherein an interval between the electric wire pressing portions by the pressing roller is different from an interval between predetermined portions where the covering portion is peeled off. 4. A first step of intermittently feeding an electric wire by a predetermined amount along a longitudinal direction thereof by an electric wire feeding mechanism having a length measuring roller, and in a feed stop period of the first step. A second step of peeling off a covering portion at a predetermined position in the intermediate region by an intermediate peeling mechanism arranged on an upstream side in a wire feeding direction of the wire feeding mechanism; and a feeding in the first step. And during the suspension period, a third step of cutting the electric wire sent from the electric wire feeding mechanism by an electric wire end processing mechanism arranged on the downstream side in the electric wire feeding direction of the electric wire feeding mechanism. By intermittently feeding the electric wire by a predetermined amount in the first step and performing the second and / or the third step each time the electric wire is fed, a predetermined portion of the intermediate area is Method of manufacturing harness with stripped coating The electric wire feeding mechanism further includes at least two pressing rollers, and the amount of movement of each pressing roller in the direction of the length measuring roller is determined by the outer circumference of the pressing roller peeling off the covering portion of the electric wire. A method for manufacturing a harness, wherein the wire is pressed against the circumference of the length measuring roller by the pressing roller while restricting the core wire so as not to come into contact with the taken core wire at a predetermined location.