JP2001035281A - Wire-feeding mechanism and pressure-welding machine for manufacture of wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize a wire feeding action and its braking action without having to expand the occupied space of a wire feeding part and increasing its weight. SOLUTION: A wire 30 is connected to an operating end 55b of a drive lever 55 of a pressing roller 52, and an air cylinder to operate the wire 30 is provided away from the connecting location of the wire 30 and the drive lever 55. When the air cylinder is replaced with one having large capacity for stabilizing a feeding action of an electric wire (a) by increasing pressing force of the pressing roller 52, since there is no air cylinder in a wire-feeding mechanism, replacement can be achieved without having to enlarge the wire- feeding mechanism and increasing its weight. Since significantly finer wires 30 than a normal cylinder diameter are lined up in the wire feeding mechanism, its basic size itself becomes more compact than the conventional ones.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire feed mechanism used for measuring and laying electric wires in the manufacture of wire harnesses.

[0002]

2. Description of the Related Art Electrical components in an automobile are electrically connected by a wire harness. As shown in FIG. 11, the wire harness is configured by arranging insulated wires a on a plane and connecting the connector C at an appropriate position in the length direction.
Each of the electric wires a is press-contacted, and the connector C is covered with a lid C ′ and fixed integrally.

[0003] In the manufacture of such a wire harness W, the electric wire a is supplied from its supply stand to the processing zone, where the wire is connected to a measuring rule, a wiring and a connector C (pressing to a terminal in the connector C; Although various processes such as crimping are performed, the wire a is conventionally fed by the following wire feeding mechanism while going through those steps. FIGS. 12 and 13 show a conventional example of the wire feeding mechanism.

[0004] As shown in the figure, this mechanism has a measuring roller 51 and a pressing roller 52 which comes into contact with and separates from the measuring roller 51.
The measuring roller 51 is rotated by being driven by a motor 53 shown in FIG. 13, and the pressing roller 52 is a lever rotatably attached to a fixed shaft 54 provided on the opposite side of the electric wire a of the measuring roller 51. It is attached to the drive lever 55 of the specification. The operating end (point of lever force) 55b of the drive lever 55
Is biased by a spring 57 in the direction of a rod 56a of an air cylinder 56 disposed immediately beside it, and the operating end 55b is pushed and pulled by the advancing and retreating of the rod 56a and the spring force, so that the drive lever 55 Performs leverage.

The operating end 59 of the drive lever 55 is bifurcated, and the pressing roller 52 is attached to one end 55a of the bifurcation and the other end 55c.
Is a holding piece 55c that presses the electric wire and stops the feeding. That is, the sending out of the electric wire a and the braking action are shared by the pressing roller 52 and the pressing piece 55c.
As compared with the one that also functions as a brake, the pressing piece 55c does not rotate like a roller, and a reliable braking action without slip can be obtained. When the brake is applied during the wire feeding while the pressing roller 52 is pressing the wire a, the rod 56a of the air cylinder 56 is advanced and the operating end 55b of the drive lever 55 is pressed, so that the drive lever Immediately before the pressing roller 52 separates from the electric wire, the pressing piece 55c presses the electric wire a to apply a brake immediately before the pressing roller 52 separates from the electric wire.

The pressing roller 52 and the pressing piece 55c
Are fulcrums (fixed shafts) 5 of the drive lever 55, respectively.
4 are located upstream and downstream in the direction in which the electric wire a is sent (downward as indicated by the arrow in the figure).
The pressing roller 52 and the pressing piece 55c alternately press the electric wire a by the lever motion of the electric wire a. In accordance with the sending direction, the wire a can be smoothly sent out, and also on the holding piece 55c side, the direction of the component force in the sending direction of the wire a of the force pressing the wire a is opposite to the sending direction of the wire a. Therefore, the braking action works efficiently.

The electric wire a is sandwiched between the measuring roller 51 and the pressing roller 52 as described above, and is driven by a motor (motor 5).
The pressing roller 52 is attached to the measuring roller 51 rotating in 3).
When the pressing force of the pressing roller 52 via the drive lever 55 is increased by adjusting the air supply amount of the air cylinder 56, the wire a is stable without slipping. The correct amount of feeding can be done.

Such an electric wire feeding mechanism includes, for example, a pressure welding machine (see FIG. 1) as shown in an embodiment to be described later, and FIG.
The head unit 20 of the pressure welding / wiring robot 200 as shown in FIG.
1 and so on. This pressure welding / wiring robot 20
At 0, the electric wire a wound around the electric wire reel 211 of the electric wire supply stand 210 is pulled out from the electric wire reel 211 by the electric wire feeding mechanism in the head portion 201, and further moved inside the head portion 201 to be cut and measured. The head unit 201 is three-dimensionally moved by the operation of the robot arms b ₁ and b ₂ , and the electric wire a is pressed against the terminal of the connector by a pressure contact unit provided in the same head unit 201.

[0009]

The above is the outline of the conventional electric wire feeding mechanism, but this mechanism has the following problems.

In order to feed the electric wire a more accurately without slipping, as described above, the pressing roller 52
However, for this purpose, the air cylinder 56 for pressing the drive lever 55 must be replaced with a cylinder having a larger capacity.

In this case, in the mechanism shown in FIGS. 12 and 13, the measuring roller 5 is attached to each of the plurality of parallel wires a.
1, the pressing roller 52, its driving lever 55, and the air cylinder 56 for pressing the pressing roller 52 are arranged close to each other. Therefore, even if the air cylinder 56 is replaced with a cylinder having a larger diameter, the air cylinder 56 interferes. Cannot be replaced. Therefore, the above-mentioned stabilization of the feeding action of the electric wire a cannot be achieved, so that accurate measuring and wiring operations cannot be performed.

Therefore, in order to replace the air cylinder 56 'with a larger cylinder diameter, the adjacent air cylinders 56' are arranged in a staggered manner as shown by a dashed line in FIG.
Regarding the drive lever 55 corresponding to the air cylinder 56 ′ moved from the original position, if the length of the arm is lengthened to cope with the problem, the range of the cylinder diameter as shown in FIG. It can be replaced with a larger air cylinder 56 'within a range in which the adjacent air cylinder 56' does not interfere.

However, if so, the space occupied by that part is widened, and the entire mechanism becomes large, and replacing the air cylinder 56 with a large one in the first place increases the weight accordingly.

Therefore, there is a problem that such a conventional feed mechanism for the electric wire a cannot be provided in a part where reduction in size and weight is particularly desired. For example, FIG.
In the case where the air cylinder 56 is replaced with a larger one, the head part 201 becomes large and its weight increases. There is a possibility that the robots 200 may not operate smoothly because a heavy load is applied to the arms b ₁ and b ₂ supporting the robot 201.

Further, if it becomes necessary to replace the cylinder 56 'indicated by a dashed line in FIGS. 12 and 13 with an air cylinder having a larger diameter, the "staggered arrangement" is further enlarged. (Increase staggered rows)
And the space occupied by the wire feeder and the weight only increase. There are limits to how this can be done.

Accordingly, an object of the present invention is to solve such a problem and to increase the pressing force of the pressing roller of the feed mechanism without increasing the occupied space and weight around the wire feed mechanism. Another object of the present invention is to stabilize the wire feeding action.

[0017]

According to the present invention, a wire is connected to an operating end of the drive lever, and the wire is operated to give a lever movement to the drive lever. At the same time, the operating mechanism of the wire is provided away from the connection position of the wire and the drive lever.

[0018] With this configuration, only the wire connected to the operating end of each drive lever is present around the operating end of each drive lever. Therefore, the size of the wire operating mechanism provided away from the operating end, that is, In the example, even if the diameter of the air cylinder is changed, the size of the occupied space around the drive lever does not change. Moreover, since the wire is usually much thinner than the diameter of the cylinder, the basic configuration itself is smaller than before.

Therefore, a wire operating mechanism having a large driving force, that is, an air cylinder having a large cylinder diameter can be adopted without expanding the space occupied around the driving lever, and the wire feeding and the braking action can be stabilized. ,
Still, a smaller and lighter wire feed mechanism than before can be obtained.

Here, in the above description, “the operating mechanism of the wire is provided“ away ”from the connection position of the wire and the drive lever”. The meaning (degree) of “away” is as follows.
For example, even if the diameter of the operating mechanism is changed to the above-described air cylinder, the space occupied by the components around the drive lever does not change at all (does not increase) even if the diameter is replaced with a larger one.

For example, there is no point in arranging the air cylinder immediately beside the drive lever as in the conventional case, and in such a case, the angle is smaller than the cylinder diameter.
In addition, this is because, if the drive lever is operated with a wire whose thickness does not change even when the capacity of the cylinder is changed, an attempt to suppress the expansion of the occupied space around the drive lever is offset.

In the above configuration, it is preferable that the pressing roller, the driving lever, and the wire for operating the driving lever are configured to correspond one-to-one with each electric wire. Since the pressing force of the roller is changed every time, and each wire can be sent out at an arbitrary length, a single feed mechanism can be used to manufacture wire harnesses of various specifications.

The drive lever has a bifurcated working end, the holding roller is provided on one arm and the holding piece is provided on the other arm, and each of the holding roller and the holding piece is separated by a fulcrum of the drive lever. If the pressing roller and the pressing piece alternately press the electric wire by leverage of the driving lever, and the electric wire is sent upstream and downstream in the direction in which the electric wire is sent, the feeding of the electric wire and the braking action are performed. Compared to the case where the pressing roller and the pressing piece are shared, and the pressing roller also serves as a brake, the pressing piece does not rotate like a roller, so reliable braking action without slipping In the feeding action of the holding roller, the direction of the component force in the feeding direction of the wire of the pressing force of the holding roller matches the sending direction of the wire. Wires can be smoothly sent out, and the other, also in the braking action of the pressing piece,
Since the direction of the component force in the feeding direction of the wire of the force pressing the wire is opposite to the direction of sending the wire, the braking action works efficiently.

In this case, a brake wire may be used as the wire. In this case, the brake wire is a flexible outer tube in which an inner wire is incorporated, and the brake wire has a wiring path for the brake wire. Regardless of the shape, the drive lever on the other end side can be operated by the operation mechanism on one end side of the brake wire, and there is great flexibility in the installation location of the operation mechanism.

However, when a simple wire is used, the operation mechanism of the wire is the same as that of the wire except that the operation line of the operation mechanism extends along the extension of the operation direction of the drive lever. It is necessary to form a wire operation path by interposing a direction changing roller in the middle of the wiring path, which leads to an increase in the size of the apparatus.

The electric wire feed mechanism having the above-mentioned structure is integrated with an electric wire feed mechanism, a cutting mechanism for cutting the electric wire sent by the feed mechanism, and a press contact mechanism for press-connecting the cut electric wire to the connector terminal. If you prepare for the wire feed mechanism of the crimping machine manufactured by wire harness manufacturing,
It is possible to obtain a press-welding machine having a stable electric wire feeding and brake action.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. The crimping machine 100 of this embodiment shown in FIGS. 1 to 10 includes a wire a that is guided into the crimping machine 100 from an external wire supply zone (not shown).
Wire moving mechanism 101 for moving the inside of the pressure welding machine 100;
The feed mechanism 101 includes a cutting mechanism that cuts the electric wire a that has reached a predetermined cutting position, and a press contact mechanism 102 that presses the electric wire a cut to a required length to a terminal in the connector C.

In this press welding machine 100, as shown in FIG. 1, a stand S is erected on a base frame 103.
In that the stand S, elevating plate 1 is attached via a linear guide L ₁ arranged in the vertical direction. The elevating plate 1 is connected to a ball screw B ₁ provided on the stand S, and is moved up and down by rotation of the ball screw B ₁ driven by a servo motor M ₁ provided on the base frame 103.

A horizontal guide plate 2 having a vertical plate surface and a long horizontal direction is fixed above the elevating plate 1. The horizontal guide plate 2 has a horizontal linear guide L.
_A horizontal slide plate 3 is attached via ₂ . The horizontal slide plate 3 is connected to the ball screw B ₂ disposed on the horizontal guide plate 2, moves in the horizontal direction by the rotation of the ball screw B ₂ by the driving of the servo motor M _2.

The pressing mechanism 102 is attached to the horizontal slide plate 3 as described above, and the pressing mechanism 102 moves horizontally by the horizontal movement of the horizontal slide plate 3. The horizontal movement of the press contact mechanism 102 is an operation that is performed when the electric wire a is laid together with the electric wire feeding mechanism 101 described later. Further, the horizontal slide plate 3 itself is moved up and down by the raising and lowering operation of the horizontal guide plate 2 to which the horizontal slide plate 3 is attached, and eventually, with this configuration, the press-contact mechanism 102 allows the press-contact blade to be described later to move up and down. Separately, the press-contact mechanism 102 itself moves up and down, but this elevating operation is performed for evacuation from the press-contact operation position in a step where the press-contact operation is not performed, such as in the wiring operation.

The press-contact mechanism 102 comprises a press-contact unit 10 having a press-contact blade 11, and a turning mechanism 20 for turning the press-contact unit 10 by 180 ° about a vertical axis. As shown in FIG. 2, the press contact unit 10 is turned 180 ° about the vertical axis because the pair of connectors C ₁ and C _{2 at} both ends of the wire harness are disposed adjacent to the pallet P before the wire press contact. First, as shown in (a),
After pressure contact with the connector C ₁ to one end of the wire harness W (pressed against the press-connecting terminal T), (b), the while the wires a tone and length, if you press again the one connector C ₂ This is because it is necessary to rotate the press contact blade 11 by 180 °. The turning mechanism 20 is as follows.

As shown in FIG. 3, the horizontal slide plate 3
Is provided with a bracket 4 of the press-contact mechanism 102 in a horizontal direction, and the bracket 4 has a vertical through hole 4a.
Is empty. A thrust bearing 5 is mounted inside the through-hole 4a, and a cylindrical body 21 having an open top is rotatably fitted into the bearing 5. A servo motor 22 is installed on the bottom surface inside the cylindrical body 21 with its main shaft 22a concentric with the axis of the cylindrical shaft of the cylindrical body 21. The main shaft 22a is provided at the bottom of the cylindrical body 21. Hole 21a
And project below the cylindrical body 21. The cylinder 21 is
With the servomotor 22 installed, the lid 23
Is covered, and a sprocket 24 is
The rotation axis is concentric with the cylinder axis of the cylinder 21 (shown by a dashed line).
It is attached to.

On the other hand, the horizontal slide plate 3 has a bracket 6 on the side opposite to the side where the sprocket 24 exists.
Are projected horizontally, and a rotary actuator 25 is attached to the lower surface of the bracket 6. The rotation axis of the rotary actuator 25 projects through the through hole 6a of the bracket 6 toward the upper surface of the bracket 6,
The sprocket 2 on the servo motor 22 side is attached to the rotation shaft.
4 and a pair of sprockets 26 are attached.
The timing belt 27 is looped around a.
The cylindrical body 21 is turned by the belt transmission of the timing belt 27 driven by the rotary actuator 25, and the pressing unit 10 attached below the cylindrical body 21 is rotated.
Turns.

The upper surface of the lid 23 of the cylindrical body 21
A stand 28 having an inlet 28a for introducing an electric wire a guided from an electric wire supply stand (not shown) outside the pressure welding machine into an electric wire feeding mechanism 101 described later is provided.
The above is the turning mechanism 20 around the vertical axis of the pressing unit 10, and the pressing unit 10 is attached to the lower surface of the sprocket 24 of the turning mechanism 20 on the servo motor 22 side. Hereinafter, this pressure welding unit 10 will be described with reference to FIGS.
This will be described with reference to FIG.

As shown in FIG. 3, the pressure welding unit 10
A press-contact blade holder 12 having a plurality of press-contact blades 11 moves up and down along a guide plate 13 attached to the lower surface of the sprocket 24. A bracket 14 for attaching the pressure welding unit 10 is fixed to a lower surface of the sprocket 24, and the guide plate 13 is hung on the lower surface of the bracket 14.

The press-contact blade holder 12 has a plurality of press-contact blades 11 disposed inside a box shape, and has a nut N of a ball screw B ₃ connected to the servomotor 22 on an upper surface of the box shape. Is fixed, and the servo motor 2
By second drive to lift by the rotation of the ball screw B _3. During the lifting, moving up and down along the linear guide L ₃ is guided by the guide plate 13 provided between the guide plate 13.

As shown in FIG. 5, the press contact blade 11 is provided with the servo motor 22 inside the box shape of the press contact blade holder 12.
As the main shaft 22a (or the ball screw shaft of the screw B ₃₎ symmetry axis coaxial vertical axis, it is arranged in two rows symmetrically on a plane parallel to the horizontal slide plate 3. In the upper part of the band-shaped main body, each of the press-contact blades 11 has a horizontal protruding portion in the right column in the figure and a horizontal protruding portion in the left column in the left direction, and the protruding portion has a box-shaped side surface. A spring 12b hanging from the outer frame of the press-contact blade holder 12 is hooked on the tip of the protrusion, and the press-contact blade 11 is constantly urged upward. Further, the pin cylinders 15 are disposed on the protruding portions in a one-to-one correspondence.
The rod 15a of the pin cylinder 15 pushes down the protruding portion against the spring force, thereby defining the vertical position of the press-contact blade 11. In one of the two rows, not only the lower end of each press contact blade 11 has a blade shape 11p for press contact, but also the lower end of the outer side has a cutting blade 11f for cutting the electric wire a. Has become. As shown in FIG. 6, connectors C ₁ and C _{2 at} both ends of the wire harness W are provided with the cutting blade 11 f for cutting the electric wire.
When press the electric wire a, as shown in (a), after pressed against the connector C ₁ end, when pressed against the connector C ₂ at the other end by performing wiring operation, after finishing the welding, separately However, if the cutting is performed by a cutting mechanism provided separately, a very large loss is caused in the apparatus configuration and in the manufacturing process.
As shown in (b), the wire harness W is manufactured efficiently by simultaneously performing the pressure welding and the cutting as shown in FIG. In the figure, reference numeral 19 denotes a press-contact blade guide. FIG. 2 (c)
In order to efficiently manufacture a wire harness W having a cross wiring specification as shown in FIG.

First, as shown in FIG. 5, each of the press contact blades 11 has two selection holes 11a at predetermined intervals in the vertical direction.
(Upper) and 11b (lower) are open.

On the other hand, an air cylinder 16 is horizontally fixed to one outer surface of the box shape of the press contact blade holder 12 which faces the press contact blade 11 in the overlapping direction (thickness direction). Pressure contact blade 1 on the rod 16a
Two selection bars 17 oriented in one overlapping direction are attached. The selection bar 17 is provided with the plurality of press contact blades 1.
The horizontal protruding portion of the desired pressure contact blade 11 is pushed down by the rod 15a of the pin cylinder 15, and the remaining pressure contact blade 11
After selecting from the lower end of the
It is for inserting into 1a and 11b to fix the state.

To fix a desired press contact blade 11 so as to protrude from the lower end of the remaining press contact blade 11, the selection holes 11a, 1
1b, the press-contact blade 11 is moved to the pin cylinder 1 until the center of the upper hole 11a coincides with the axis of the selection bar 17.
5, the air cylinder 16 is operated in this state, and the selection bar 17 is inserted into the upper selection hole 11a.
In this manner, the desired press contact blade 11 is replaced with the remaining press contact blades 11.
Blade 12 protruding from the lower end of the blade and fixed
Is lowered by the rotation of the ball screw B ₃ , only the protruding press contact blade 11 is inserted into the groove of the press contact terminal, so that only the wire a supplied to the position of the press contact blade 11 is pressed. Become.

As described above, the selection of the press contact blade 11 by the selection mechanism is performed by the wire harness W of the cross wiring specification.
It is intended to efficiently manufacture the same, but for details of its operation, refer to Japanese Patent Application No. 8-256418.

It should be noted that the press contact blade holder 12 has
As shown in FIG. 1, a dog 18 protruding in both the left and right directions is provided for confirming the bottom dead center. When the press contact blade holder 12 reaches the bottom dead center, the dog 18 comes into contact with the dog 18. A dial gauge 18g is provided at the position of the bottom dead center.

The pressing mechanism 102 of the press machine 100 of this embodiment has been described above. The cutting mechanism for measuring and wiring exists as an independent mechanism in the press machine 100 as described above. Instead, the cutting edge 11 is provided on the side end of one set of the pressure contact blades 11 of the two rows of symmetrical pressure contact blades 11.
f is provided so that pressing and cutting can be performed simultaneously. Finally, a description will be given of the electric wire feeding mechanism, which is the main feature of the present invention.

As shown in FIG. 1, the electric wire feeding mechanism 101 of this embodiment is attached to the side of the press-contact mechanism 102, and the electric wire feeding mechanism 101 shown in FIGS. It is only taken out. Wire a
Before the operation of the apparatus, the pressure welding unit 1 shown in FIG.
0 electric wire introduction stand 28 (introduction port 28)
a) through the wire feed mechanism 101.

As shown in the drawing, the electric wire feeding mechanism 101 has a driving lever 55 having a measuring roller 51 corresponding to each electric wire a one-to-one and a pressing roller 52 which comes in contact with and separates from the measuring roller 51. 55 is similar to the conventional example in that the working end 59 has two branches, one of which is provided with the pressing roller 52, and the other is a pressing piece 55c which performs a braking action. What is different from the above is the configuration related to the operation mechanism for operating the operation end 55b of the drive lever 55. Hereinafter, this configuration will be described. In the configuration around it, the same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

As described above, in the present invention, the wire 30 is interposed between the drive lever 55 and the cylinder, and the wire 30 is pulled by the cylinder, instead of directly operating the drive lever 55 by pushing and pulling it with the cylinder. The air cylinders (4
0,...) Are provided on one side surface of the horizontal guide plate 2 distant from the drive lever 55 as shown in FIGS.

As shown in FIG. 10, the group of air cylinders 40 includes a lower top plate 4 of a rectangular frame 41 having two upper and lower stages.
1a are arranged in a staggered shape in plan view, and the top plate 4
1b, a jig 42 for adjusting the amount of pushing and pulling the brake wire, which will be described below, is disposed at a position directly above each of the cylinders 40.

The push-pull amount adjusting jig 42 is a trimming bolt 43 having a stepped through hole 43a along the central axis.
And a nut 44, and a portion of the cut bolt 43 is screwed to the top plate 41a of the rectangular frame in a thickness direction thereof, and the nut 44 is screwed to a portion protruding above the top plate 41b. . By rotating the nut 44, the portion of the cut bolt 43 can be moved along the thickness direction of the top plate 41b.

In this embodiment, the brake wire 30 used in the brake mechanism of the bicycle is used as the operation wire 30 of the drive lever 55. The brake wire 30 is obtained by inserting the inner wire 32 into a flexible outer tube 31. If the positions of both ends of the outer tube 31 are determined, the wire 30
Regardless of the curved shape of the wiring path of the operation end 55,
By pushing and pulling b, the operating end 59 connected to the drive lever 55 can be operated to drive the drive lever 55. Therefore, compared to the case where a simple wire is used, the wire 30
The air cylinder group (40,...) That operates the operation end without interposing a direction change mechanism such as a pulley in the middle of the wiring path of
..) Can be arranged at an arbitrary position, and the degree of freedom for integrating the device into a small one is greatly increased.

In this embodiment, the brake wire 3
0 is connected to the operating end 55b of the drive lever 55, and the other end is connected to the rod 40a of each cylinder 40 via the push-pull amount adjusting jig 42 via the connecting member 45. The brake wire 30 is inserted into the stepped through hole 4
The stepped portion of the outer tube 31 is fixed to the stepped portion 3 so as to be engaged therewith. Therefore, by rotating the nut 44 screwed to the trimming bolt 43, the trimming bolt 43 moves in a direction perpendicular to the surface of the top plate 41b into which it is screwed, and The distance between the drive lever 30 and the drive lever 55 side end (operation end 55b) is adjusted,
Therefore, the amount of pushing and pulling of the wire 30 is adjusted.

With such a configuration, the operation of the drive lever 55 is controlled by the cylinder 40 provided at a position distant therefrom.
The rods 40a are moved forward and backward, whereby each pressing roller 52 presses the electric wire a toward the measuring roller 51, and when the brake is applied, the pressing roller 52
Instead, the pressing piece 55c presses the electric wire a.

Thus, the wire feed mechanism 1 of this embodiment
In the case of 01, even if the cylinder 40 is replaced with a cylinder having a larger capacity in order to increase the pressing force of the pressing roller 52 and the pressing piece 55c, it is a change at a place far from the drive lever 55. Since the wire 30 is always present around the drive lever 55 in the feed mechanism 101 and does not change, the size and weight of the space occupied by the wire 30 do not increase before and after the air cylinder 40 is replaced. Since the basic size of the space occupied by that portion is such that the wires 30 that are much thinner than the diameter of a normal air cylinder are arranged, the adjacent drive lever 55 has a structure as shown in FIGS. The interval can be reduced, and the base frame 58 and the electric wire guide 101a are significantly smaller than those of the conventional example, as shown by the lead line, arrow and dashed line. Of course, the weight is also lighter than that of the air cylinder.

As described above, the wire feed mechanism 10 of the present invention
Taking advantage of the first aspect, as another embodiment, for example, when the feed mechanism 101 is provided in the head section 201 of the pressure welding / wiring robot 200 shown in FIG. As shown by a dashed line in FIG. 12, the air cylinder 40 that is the driving source of the drive unit 30 is located outside the region of the head unit 201 such as the base unit of the robot (ie
(Outside the area of the feed mechanism 101), and at a position far away from the head unit 201, as described above, even if the air cylinder 40 is replaced with a large-capacity air cylinder, the space occupied by the head unit 201 is reduced. Weight is air cylinder 4
There is no change before and after replacing 0. In the first place, there is no heavy air cylinder in the head part 201, and the diameter of the wire 3 is smaller than the air cylinder and takes less space.
Since 0 is the structure of only aligned, without burdening the arm portion b _1, b ₂ for supporting the head portion 201, to increase the pressing force of the pressing roller 52 and the pressing piece 55c, stable extrusion action of wires a And a more reliable braking action can be realized.

[0054]

As described above, according to the present invention, a wire is connected to an operating end of a drive lever of a pressing roller which presses and sends an electric wire to a measuring roller driven by a motor,
Since the operation mechanism of the wire is provided away from the connection position of the wire and the drive lever, the remodeling of the operation mechanism for increasing the pressing force of the pressing roller and stabilizing the wire feeding operation is performed by the wire feeding mechanism section. It can be realized without increasing the size and weight of the device. In addition, the basic size of the wire feeding mechanism itself is smaller than before.

At this time, if the pressing roller, the driving lever, and the wire for operating the driving lever are made to correspond one-to-one for each wire, the pressing force of the roller is changed for each wire, and Since each wire can be sent out or braked at any length, a single feed mechanism can be used to produce wire harnesses of various specifications.

Further, the working end of the drive lever is forked, and the pressing roller is provided on one arm and a pressing piece is provided on the other arm, and each of the pressing roller and the pressing piece is separated by a fulcrum of the driving lever. And the pressing roller and the pressing piece alternately press the wire, so that the wire feeding and the braking action are performed on the feeding roller and the pressing piece, respectively. If shared, it is possible to obtain a more reliable braking action without slip compared to the one in which the feed roller also serves as a brake.
The direction of the component force in the feed direction of the wire of the pressing force of the holding roller matches the direction in which the wire is sent, and even in the braking action of the holding piece, the direction of the component force in the feed direction of the wire to push the wire is Is opposite to the direction in which
The feeding action and the braking action work efficiently.

If a brake wire is used as the wire in each of the above configurations, the brake wire is one in which an inner wire is incorporated in a flexible outer tube. Regardless of the curved wire path of the wire, if the operating end is pushed and pulled, the operating end connected to the drive lever can be operated to drive the drive lever, so unlike the case where a simple wire is used, There is no need to provide a mechanism for changing the direction of the route in the middle of the wiring route of the wire, and the operating mechanism of the wire can be installed at an arbitrary place, and the degree of freedom for miniaturizing the device is increased. There is an advantage.

[0058] The above-described press-connecting machine for wire harness manufacturing, in which an electric wire feed mechanism, a cutting mechanism for cutting the electric wire sent by the feed mechanism, and a press-contact mechanism for press-connecting the cut electric wire to the connector terminal are integrated. If the electric wire feed mechanism is equipped with the electric wire feed mechanism of the present invention, especially for the electric wire feed portion, a crimping machine which is disadvantageous in its occupied space and weight, for example, a head of a measuring and wiring robot In the case of such a part, it is possible to stabilize the feeding of the electric wire and the braking action without causing such inconvenience, and it is possible to perform a highly accurate measuring and wiring operation.

[Brief description of the drawings]

FIG. 1A is a front view of a pressure welding machine according to an embodiment,
(B) is a side view.

FIGS. 2 (a) and 2 (b) show a press contact blade 180 degrees around a vertical axis.
FIG. 6 is a schematic view showing the reason for turning and press-contacting, and FIG. 6C schematically shows a wire harness of cross wiring.

FIG. 3 is a side sectional view of the pressing mechanism according to the embodiment.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a perspective view showing a selection mechanism of a press contact blade.

6 (a) and 6 (b) show the states of press-contact and cutting at one end and the other end of a wire harness by a press-contact blade having both a blade shape for press-contact and a blade shape for cutting, respectively. It is the figure which showed typically.

7A is a front view and FIG. 7B is a side view including a partial cross section of the embodiment.

8A is a plan view, and FIG. 8B is a rear view of the embodiment.

FIG. 9A is a plan view of a pressure welding machine according to an embodiment, and FIG.
FIG. 2 is an enlarged view of a main part of the pressure welding machine.

10A is a front view and FIG. 10B is a plan view of the embodiment.

FIG. 11 is a perspective view showing an example of a wire harness.

FIG. 12 is a side view of a conventional wire feed mechanism including a partial cross section.

13A is a plan view of FIG. 12, and FIG. 13B is a front view.

FIG. 14 is a schematic diagram showing a pressure welding / wiring robot as an example of use of an electric wire feeding mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elevating plate 2 Horizontal guide plate 3 Horizontal slide plate 10 Pressure contact unit 11 Pressure contact blade 12 Pressure contact blade holder 20 Rotating mechanism 30 Brake wire 40, 56 Air cylinder 51 Measuring roller 52 Pressing roller 54 Fixed shaft (supporting point of drive lever) 55 Drive Lever 55b Operation end 55c Pressing piece 59 Working end 100 Pressure welding machine 101 Wire feed mechanism 102 Pressure welding mechanism a Wire C Connector W Wire harness

Claims (5)

[Claims] 1. A scale roller which is used when measuring and arranging an electric wire in the manufacture of a wire harness and which is driven by a motor, and which has a press roller which comes into contact with and separates from the scale roller. Is attached to the working end of a drive lever of a lever specification, and by operating the operation end of the drive lever, the drive lever performs lever motion and comes into contact with and separates from the measuring roller. An electric wire interposed between the measuring roller and the pressing roller, operating the drive lever, and rotating both rollers in a pressure-contact state, so that the electric wire sending mechanism that sends out the electric wire, A wire is connected to the operation end of the drive lever, and the wire is operated to give a lever movement to the drive lever, and the operation mechanism of the wire is connected to the connection position between the wire and the drive lever. Wire feed mechanism in the manufacture of a wire harness, characterized in that away be provided. 2. The electric wire according to claim 1, wherein the pressing roller, the driving lever, and the wire for operating the driving lever are associated one-to-one with each electric wire. Feed mechanism. 3. The operating end of the drive lever is forked, and the pressing roller is provided on one arm and a pressing piece is provided on the other arm, and each of the pressing roller and the pressing piece is separated by a fulcrum of the driving lever. The pressing roller and the pressing piece alternately press the electric wire by lever movement of the drive lever, so that the electric wire is positioned on the upstream side and the downstream side of the direction in which the electric wire is sent. Or an electric wire feed mechanism in the production of the wire harness according to 2. 4. The wire feeding mechanism according to claim 1, wherein a brake wire is used as the wire. 5. A crimping machine in the manufacture of a wire harness in which an electric wire feed mechanism, a cutting mechanism for cutting the electric wire sent by the feed mechanism, and a press contact mechanism for press-connecting the cut electric wire to a connector terminal are integrated. A crimping machine for manufacturing a wire harness, wherein the wire feed mechanism according to any one of claims 1 to 4 is provided as the wire feed mechanism.