JPH0622891Y2 - Electric wire feeder - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention is to pull out from a stock roll to an electric wire processing unit that performs a predetermined processing on a plurality of electric wires while intermittently feeding a plurality of electric wires by a feeding roller. The present invention also relates to an electric wire feeding device for feeding the plurality of electric wires.

(Prior Art and Problems Thereof) A device for performing a predetermined treatment on an electric wire, for example, Japanese Patent Publication Sho 60
The continuous terminal crimping machine shown in No. 32314 (hereinafter referred to as "electric wire processing unit") measures the length of the electric wire (hereinafter referred to as "measurement amount") to be processed by the feeding roller. After the feeding to the processing means, the feeding of the electric wire by the feeding roller is stopped, and the predetermined processing is performed by the processing means.

Here, since the feeding roller operates intermittently as described above, the electric wire starts to move rapidly with the start of length measurement (the feeding roller changes from the stopped state to the driven state). At this time, if some restraining force is applied to the wire located upstream of the wire feeding direction, tension will act on the wire in the direction opposite to the wire feeding direction and the wire will expand. To do.

Therefore, conventionally, there has been proposed an electric wire feeding device for forming a slack portion on the electric wire located upstream with respect to the electric wire feeding direction so as not to apply unnecessary tension to the electric wire at the start of length measurement. There is.

FIG. 3 is a schematic configuration diagram of a conventional wire feeding device. This electric wire feeding device feeds the covered electric wire 2 wound around the stock roll 1 to the electric wire processing section A. As shown in the figure, this electric wire feeder comprises a guide roller 3, an extension roller group 4, a pre-feeder roller 5 and a limit switch 6. Then, the electric wire 2 wound around the stock roll 1 is fed via a guide roller 3 to an extension roller group 4 in which a large number of rollers are arranged in a zigzag manner, and the extension roller group 4 bends the electric wire 2 or the like. Is removed and then sent out to the electric wire processing section A via the pre-feeder roller 5 consisting of a set of two. In the electric wire processing unit A shown in FIG. 3, a feeding roller 7 for feeding the electric wire 2 for a length measurement amount to a processing means (not shown) while measuring the electric wire 2, and an electric wire guide 8 arranged before and after the feeding roller 7. , 9 are shown, and other configurations are omitted.

Next, the operation of the wire feeder will be described. First, before the length measurement by the feeding roller 7, as shown in FIG. 3, a slack portion Y is formed between the pre-feeder roller 5 and the feeding roller 7.

Then, in synchronization with the operation of the wire processing unit A, the pre-feeder roller 5 of the wire feeder also operates. At this time, the rotation speed of the pre-feeder roller 5 is the time required from the start of length measurement to the completion of the predetermined processing in the electric wire processing section A, that is, the electric wire fed from the feeding roller 7 to the processing means within one cycle operation time. The electric wire 2 is adjusted so as to be fed toward the electric wire processing section A in an amount, that is, an amount slightly smaller than the length measurement amount.

With the start of the operation of the electric wire processing section A, first, the feeding roller 7 is operated to measure the length. After that, when the length measurement is completed, the feeding roller 7 is stopped, the electric wire 2 is subjected to predetermined processing by the processing means, and the one-cycle operation of the electric wire processing unit A is completed. During this period, the amount of slack of the slack portion Y gradually decreases in the operation section of the feeding roller 7 and increases conversely in the stop section. This variation in the amount of slack of the slack portion Y is repeated in synchronization with the feeding / stopping operation of the feeding roller 7, but as described above, the length of the electric wire fed from the pre-feeder roller 5 to the electric wire processing portion A. Is set to be slightly smaller than the length measurement amount of the feed roller 7, so that the variation range of the slack amount of the slack portion Y gradually shifts in the direction of eliminating the slack portion Y as the above operation is repeated, and eventually the slack portion The electric wire 2 of Y pushes the limit switch 6, and it is detected that the electric wire 2 has reached the minimum limit slack amount.

When it is detected by the limit switch 6 that the minimum limit slack has been reached, the pre-feeder roller 5 is controlled so that the rotation speed of the pre-feeder roller 5 becomes higher than that of the feeding roller 7 for an appropriate time. Sagging part Y again
The amount of slack is increased. In this way, the electric wire is intermittently fed to the electric wire processing section A in the state where the slack portion Y is always formed, and the tension application to the electric wire 2 is prevented.

In the above, the case of feeding one electric wire 2 to the electric wire processing section A has been described, but here, consider the case of feeding a plurality of electric wires 2 in parallel to the electric wire processing section A by the above device. . In this case, it is necessary to provide the above device for each electric wire 2. The reason is that multiple electric wires 2
When a single pre-feeder roller 5 is simultaneously fed to the electric wire processing section A, different feed errors may occur for each electric wire 2, but one pre-feeder roller 5 eliminates all of these errors. This is because it cannot be done. For example, when two electric wires are fed to the electric wire processing section side by one pre-feeder roller and different feed errors E1 and E2 occur in those electric wires, the rotation speed of the pre-feeder roller is appropriately set. Even if the feed error E1 of one electric wire is eliminated by controlling, the feed error E2 of the other electric wire becomes (E2-E1),
The error still remains.

Therefore, it is necessary to provide as many pre-feeder rollers 5 as a drive system as the number of the electric wires 2 to be fed to the electric wire processing section A, which complicates the structure of the device and increases the manufacturing cost. .

(Object of the Invention) The present invention has been made in order to solve the above problems, and provides an electric wire feeding device capable of feeding a plurality of electric wires with a simple and inexpensive structure while having a required slack. With the goal.

(Means for Achieving the Purpose) The present invention is directed to a plurality of electric wires that are drawn from a stock roll in an electric wire processing unit that performs a predetermined process on the plurality of electric wires while intermittently feeding the plurality of electric wires by a feeding roller. An electric wire feeding device for feeding an electric wire, and in order to achieve the above object, a first guide roller group for guiding each of the electric wires in a feeding direction between the stock roll and the feeding roller. A second guide roller group for guiding the electric wires in the feeding direction between the first guide roller group and the feeding roller, and the first and second guide rollers corresponding to the electric wires A slack forming roller group disposed between the groups, a driving unit for driving the slack forming roller group in a direction substantially perpendicular to the feeding direction, and the plurality of feeding rollers. Stop feeding wires In this state, the slack forming roller group is driven by the driving means to form the slack of the plurality of electric wires in the same amount between the first and second guide roller groups. Is equipped with.

(Embodiment) FIG. 1 is a schematic perspective view showing an embodiment of an electric wire feeding device according to the present invention. The electric wire feeder has two electric wires 2
a, 2b is fed to a feeding roller (not shown) of an electric wire processing unit (not shown), and is a guide roller 3a, 3b.
b, 11a, 11b, slack forming rollers 10a, 10
b, extension roller groups 4a and 4b, and an air cylinder 12. That is, the covered electric wire 2a wound around the stock roll 1a is fed through the guide roller 3a, the slack forming roller 10a, and the guide roller 11a to the extending roller group 4a in which a large number of rollers are arranged in a zigzag pattern. The extension roller group 4a is configured to remove the curl or the like of the electric wire 2 and then send the electric wire 2 to the feeding roller of the electric wire processing unit. Further, the electric wire 2b wound around the stock roll 1b is also configured in the same manner as above. As shown in FIG. 1, the guide rollers 3a, 3
Both b are rotatably supported by the shaft 13 to form a first guide roller group, while the guide rollers 11a, 1b
Both 1b are rotatably supported by the shaft 14
A guide roller group is formed. In addition, the slack forming rollers 10a and 10b are both rotatably supported by the shaft 15, and the shaft 15 serves as the air cylinder 12.
Of the slack forming roller 10 connected to the tip of the piston portion 12a of the
The a and 10b are configured to be driven in synchronization in a direction substantially perpendicular to the feeding direction of the electric wires 2a and 2b.

Next, the operation of the above device will be described with reference to FIG. Since the configurations corresponding to the electric wires 2a and 2b are the same, both configurations are shown in the same drawing. And
The subscript a is attached to the configuration corresponding to the electric wire 2a, and the subscript b is attached to the configuration corresponding to the electric wire 2b.

First, the feeding roller 7 of the electric wire processing unit is in a stopped state, and the electric wires 2a and 2b are not measured (hereinafter referred to as "non-measuring state"), and are indicated by a chain line in FIG. As described above, in a state in which the electric wire 2a (2b) is stretched (hereinafter, referred to as "linear state"), the slack forming roller 10a (see FIG. 1) is slackened by the air cylinder 12 (FIG. 1) based on a command from a control unit (not shown). 10b) is pushed down by an amount corresponding to the length measurement amount. Looking at the restraining force on the electric wire 2a (2b) at this time, the electric wire 2a (2b) is held by the pair of rollers in the non-measuring state (stopped state) on the feeding roller 7 side. Stock roll 1 while held
Since the stock roll 1a (1b) is always rotatable on the side of a (1b), no holding force is applied to the electric wire 2a (2b). Therefore, the slack forming roller 10
The electric wire 2a (2b) wound around the stock roll 1a (1b) by pressing down the a (10b)
Are fed in the wire feeding direction. Here, the air cylinder 1
Since the vertical movement range of the second piston portion 12a is set to a value corresponding to the length measurement amount, the slack portion Y having the same amount of slack as the length measurement amount is connected to the electric wire as shown by the solid line in FIG. 2a and electric wire 2b, respectively.

Then, based on the command from the control unit, the air cylinder 12
The slack forming roller 10a (10b) shown in FIG.
Is returned to its original position, and the length can be measured.

Next, the feeding roller 7 is actuated, and after the electric wires 2a and 2b are fed to the processing unit while being measured, the feeding roller 7 is stopped and the electric wire 2a (2b) undergoes a predetermined process. Is applied. In this way, with the feeding operation of the feeding roller 7, the electric wire 2a (2b) corresponding to the length measured by the feeding roller 7 is measured.
Is fed in the electric wire feeding direction, and the electric wire 2a (2b) becomes a straight line again as shown by the alternate long and short dash line in FIG.

After that, the series of operations described above is repeated for the electric wire 2a (2b).

As described above, in the above device, the guide roller 3
The slack forming rollers 10a, 10b provided between a, 3b, 11a, 11b are driven by the air cylinder 12 in synchronism with each other in a direction substantially perpendicular to the wire feeding direction, and between the guide rollers 3a, 11a and the guides. Rollers 3b, 1
Since the slack portions Y having the same amount of slack are formed between the respective 1b, the drive system has the air cylinder 1
Only two are required, and the structure of the device can be simplified. Further, in the conventional example, when feeding two electric wires, two drive means (pre-feeder roller 5) were required as a drive system, but in the above embodiment, one air cylinder 12 is used as a drive system. Since the device can be configured only by being provided, the manufacturing cost can be reduced.

In the above embodiment, the slack forming roller 10a (10b) is pushed down by the air cylinder 12 to form the slack portion Y having the same slack amount as the length measuring amount. The slack portion Y having the above slack amount may be formed. For example, the slack forming roller 10a (10
When the slack portion Y having a slack amount n times the length measurement amount is formed by pushing down b), the slack forming roller 10 by the air cylinder 12 is subjected to the length measurement operation n times.
It may be set so that the pressing operation of a (10b) is performed once.

In the above embodiment, the slack forming roller 10a (10b) is provided between the guide roller 3a (3b) and the guide roller 11a (11b), and the slack forming roller 10 is provided.
The case where the a (10b) is driven in a direction substantially perpendicular to the feeding direction of the electric wires 2a, 2b has been described, but the guide roller 11a (11b) is not provided and the guide roller 3a is not provided.
A slack forming roller 10a (10b) may be provided between (3b) and the extension roller group 4a (4b) or between the extension roller group 4a (4b) and the feeding roller 7. Further, the slack forming roller 10a (10b) may be provided between the guide roller 3a (3b) and the feeding roller 7 without providing the extension roller group 4a (4b).

Further, in the above embodiment, the guide rollers 3a and 3b are arranged at the same height position and connected by the shaft 13, but the guide rollers 3a and 3b do not necessarily have to be connected. Further, the height position of the guide roller 3a may be different from the height position of the guide roller 3b. In this case,
The slack forming rollers 10a and 10b are arranged corresponding to the guide rollers 3a and 3b, respectively, and the slack forming rollers 10a and 10b are driven by the air cylinder 12 between the guide rollers 3a and 11a and between the guide rollers 3b and 11b.
The slack of the electric wires 2a and 2b may be formed between b by the same amount. In addition, the guide roller 1
The same applies to 1a and 11b as to the guide rollers 3a and 3b.

Further, in the above embodiment, the case where two electric wires 2a and 2b are fed has been described, but the present invention can be applied to the case where three or more electric wires are fed to the electric wire processing unit, and the number of feeding and feeding wires can be increased. Regardless, the device can be configured with only one air cylinder 12 as a drive system, and the same effect as described above can be obtained.

Further, although the case where the air cylinder 12 is used as the drive system has been described in the above embodiment, the present invention is not limited to this.

(Effect of the Invention) As described above, according to the electric wire feeding device of the present invention, in a state where the feeding of a plurality of electric wires by the feeding roller is stopped,
The first slack forming roller group is driven by the driving unit.
Since the slack of the plurality of electric wires is formed by the same amount between the second guide roller group and the second guide roller group,
Regardless of the number of electric wires, the slack of the electric wires can be formed only by the driving means, the structure of the apparatus can be simplified, and the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an embodiment of an electric wire feeding device according to the present invention, FIG. 2 is an explanatory view for explaining the operation of the device shown in FIG. 1, and FIG. 3 is a conventional electric wire feeding device. It is a schematic block diagram of an apparatus. 1, 1a, 1b ... Stock roller, 2, 2a, 2b ... Electric wire, 3, 3a, 3b, 11a, 11b ... Guide roller, 7 ... Feeding roller, 10a, 10b ... Slack forming roller, 12 ... Air cylinder, A ... Electric wire processing section

Claims (1)

[Scope of utility model registration request] 1. An electric wire feed for feeding the plurality of electric wires drawn from a stock roll to an electric wire processing section which performs a predetermined treatment on the plurality of electric wires while intermittently feeding the plurality of electric wires by a feeding roller. A device, comprising: a first guide roller group that guides each of the electric wires in a feeding direction between the stock roll and the feeding roller; and a first guide roller group and the feeding roller. Between,
A second guide roller group that guides each of the electric wires in the feeding direction; a slack forming roller group that is arranged between the first and second guide roller groups corresponding to each electric wire; Drive means for driving the roller group in synchronism with a direction substantially perpendicular to the feeding direction; and a state in which the feeding means stops the feeding of the plurality of electric wires by the feeding means. An electric wire feeding device comprising: a slack forming roller group which is driven to form a slack of the plurality of electric wires between the first and second guide roller groups by the same amount. .