JPS6347530B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a twisting machine for twisting a plurality of filaments such as bare wires and intervening wires to form, for example, a control plastic cable.

For example, a control plastic cable is made by twisting together multiple strands of conductor covered with plastic, and twisting the strands together with an intervening material such as a jute to give the outer shape a circular shape. It is constructed by covering it with tape and forming an insulating layer around its outer periphery, but when manufacturing such plastic cables, the work of wrapping the tape is usually a work of twisting the strands and the intervening wire. It is done at the same time,
Conventionally, a twisting machine constructed as shown in FIG. 1 has been known as a device for performing such work. That is, the filament bodies 1, 1, etc., such as the wires to be twisted and the intervening wires, are pulled out from the bobbins 2, 2, and wound around the guide rollers 3, 3, and at the same time, It is inserted into a through hole and further focused using a cap 5. Further, the bundled filament 1 is passed through a tape winding device 6 disposed in front of the cap 5 along its center of rotation, and is sequentially wound around a pre-twister 7 and a double twisting device 8, and these are rotated. As a result, the filament 1 is twisted together and further wound up by a winding device 9 provided in the twice-twisting device 8. Here, the tape winding device 6 has a tape head 10 through which the bundled filament 1 is inserted, and by rotating this tape head 10 with an appropriate drive device, it is fed out from a tape pad 11 attached thereto. The tape 12 is wound around the filament 1. In addition, the pre-twister 7
A frame 13 is arranged along the running direction of the filament body 1 and rotatably supported, and a plurality of pulleys 1 are rotatably attached to the frame 13.
4, 14, and the focused filament 1 is sequentially wound around each pulley 14, 14, and in this state, each pulley 14, 14 is placed on the same axis as the axis of the tape head 10 together with the frame 13. It is configured so that the bundled filament bodies 1 are twisted by rotation. Further, the double twisting device 8
is constructed between a pair of hollow support shafts 15 and 15' that are rotatable on the same axis as the rotational center line of the frame 13 and spaced apart from each other, and that is constructed between these support shafts 15 and 15'. and a bow-shaped flyer 1 having a plurality of guide rollers 16, 16...
7, and a floating frame 18 attached via bearings between the tips of the support shafts 15, 15', and the winding device 9 is disposed on the floating frame 18, and the winding device 9 is disposed on the floating frame 18. The filament 1 sent out from the pre-twister 7 is inserted into one of the support shafts 15 and pulled out from the opening in its outer wall, and passes through the guide rollers 19 provided here to the guide rollers 16, 16 provided in the flyer 17. . . . and is further guided into the support shaft 15' through a guide roller 19' provided in the outer wall opening of the other support shaft 15', and each guide roller 20, 20 constituting the winding device 9. ……
..., and finally it is wound up on a winding drum 21, and while winding up the filament 1 on the winding drum 21, each support shaft 15, 15' and the flyer 1
By rotating the pre-twister 7 with a predetermined drive device (not shown), the filament 1 can be twisted at two locations, one with the pre-twister 7 and the other with the winding device 9. Note that when the rotational speed of each support shaft 15, 15' of the twice-twisting device 8 and the flyer 17 is Nrpm, the pre-twister 7 is rotationally driven in the same direction at 2Nrpm, and therefore the filament 1 is rotated at 2Nrpm. After being twisted in the pre-twister 7 to form a twist, the material is once untwisted between the pre-twister 7 and the double-twisting device 8, and then twisted again with the winding device 9. This is designed to prevent loosening between the strands and the concomitant drop in the strands between the strands.

However, the conventional twisting machine described above has a configuration in which the tape 12 is wound around the filament body 1 by rotating the tape head 10 in the tape winding device 6 to rotate the feeding position of the tape 12 around the filament body 1. Therefore, the tape 12 is only wrapped around the striatum 1 by its own tension,
Since there is no means for fixing the tape 12, the tape 12 becomes loose when it is untwisted between the pre-twister 7 and the double-twisting device 8, and as a result, the tape 12 itself has no rigidity. Problems such as wrinkles forming or the winding pitch being misaligned may result in gaps. In the conventional twisting machine, when winding the tape 12 around the filament 1, the tape head 10
Since the structure is such that the feeding device for the tape 12 is rotated by rotating the tape 12, when the rotation speed of the tape head 10 is increased in order to increase the rotation speed for twisting the filament 1, the speed of the tape 12 becomes faster. The abrasion force between the tape 12 and the guide member provided on the tape head 10 to guide the tape 12 from the tape pad 11 toward the filament 1 increases, and at the same time the centrifugal force acting on the tape 12 increases. The tension in the tape 12 may become excessive, which limits the number of rotations of the tape head 10, making it difficult to increase the number of rotations for twisting the filament 1 above a certain level. Furthermore, if a tape pad 11 with a long overall length of the tape 12, that is, a tape pad 11 with a large outer diameter is used, the rotation radius of the tape 12 feeding position increases, and the speed of the tape 12 feeding position increases accordingly. For the same reason as when the number of revolutions is increased, a problem arises in which the tension in the tape 12 becomes excessively high.Therefore, in conventional twisting machines, the outer diameter of the tape pat 11 is limited to a certain level or less. A tape pad 11 having a long overall length of the tape 12 cannot be used, and therefore the entire twisting machine has to be stopped frequently in order to replace the tape pad 11 with a new one, resulting in a problem of poor work efficiency.

The object of the present invention is to provide a wire twisting machine that can effectively solve the above-mentioned problems.

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3. In the embodiment described below, the same members as those shown in FIG. 1 are denoted by the same reference numerals, and the explanation thereof will be omitted.

Reference numeral 22 in FIG. 2 is a tape former disposed between the base 5 and the pre-twister 7, and as shown in FIG. Alternatively, the slit 22a has a cylindrical shape with a slightly larger diameter and extends along the axial direction.
is formed, and is arranged and fixed so that its central axis coincides with the filament 1. Further, a tape head 23 serving as a tape feeding device is disposed at a position radially outward and rearward of the tape former 22.
A tape 25 is fed out from a tape pad 24 attached to the tape former 22. Note that a thread 26 is wound onto the tape 25 by a thread winding device 27 if necessary. This bobbin winding device 27 has a center portion that is connected to the tape 2.
It has a rotary plate 28 through which the filament 1 coated with 5 passes through and is rotated by a predetermined drive device (not shown). A plurality of bobbins 29, 29 that rotate around an axis parallel to the axis are attached, and the rotating plate 28
By rotating the bobbins 29, 29 to revolve around the filament body 1, the unwound yarn 26 unwound from the bobbins 29, 29 is wound around the outer periphery of the filament body 1 covered with the tape 25. The tape 25 is fixed thereon.

Therefore, if the pre-twister 7 and the flyer 17 of the double-twisting device 8 are rotated while winding the filament 1 in the winding device 9, the filament 1 travels while being twisted. By inserting the tip of the tape 25 into the slit 22a of the tape former 22 and fixing or locking it to the filament 1, the tape 25 runs while the filament 1 is twisted, that is, rotated. From there, it is wrapped around the outer periphery of the filamentous body 1, and as a result, the filamentous body 1 is covered. In this case, the feeding speed of the tape 25, that is, the circumferential speed of the tape pad 24 is approximately equal to the sum of the running speed and the rotational speed of the filament 1, but the tape pad 24 having a large radius, that is, the tape pad 24 having a long overall length, When used, the rotational speed becomes rather slow, which makes it possible to use a long tape pad 24 without increasing the tension of the tape 25 excessively, thereby reducing the likelihood of replacing the tape pad 24. be able to.
Furthermore, since the outer diameter of the filament body 1 is significantly smaller than the outer diameter of the tape pad 24, even if the rotation speed for twisting the filament body 1 is increased, the rotation speed of the tape pad 24 will not increase that much. Therefore, the twisting rotation speed of the filament 1 can be increased as required. Furthermore, since it is not necessary to insert the filament 1 into the tape pad 24, the above-mentioned twisting machine can be stopped when replacing the tape pat 24, or the filament 1 can be inserted into a new tape pat 2.
There is no need to perform work such as re-inserting the tube into the tube.

The filament 1 coated with the tape 25 as described above is then rotated by the pre-twister 7 by rotating the pre-twister 7 at 2Nrpm and driving the flyer 17 of the twice-twisting device 8 at Nrpm. After the twist is applied, it is once untwisted between the pre-twister 7 and the double-twisting device 8,
Thereafter, the fibers are twisted again between the twice-twisting device 8 and the winding device 9.

In addition, in the above embodiment, an example in which the present invention is applied to a so-called buncher-type twisting machine has been described, but the present invention is not limited to the above-mentioned embodiment, but can also be applied to a winding rotation type twisting machine (drum twister). can.

As explained above, according to the present invention, the filament that has been focused by the cap is inserted into the tape former, and the tape is fed out from the tape feeding device disposed at a position radially outward of the filament, and the tape is fed into the tape former. Since the tape is fed in and wrapped around the filament body by its rotational action (twisting action), the position at which the tape is fed can be fixed. Therefore, according to the present invention, it is possible not only to speed up the twisting of the filament bodies and to reduce the frequency of replacing tape parts by using tape parts having a long tape length, but also to reduce wrinkles and irregularities in the pitch of the tape. It is possible to wrap the tape without causing problems such as the like, and as a result, it is possible to obtain effects such as being able to significantly improve work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing a conventional twisting machine, FIG. 2 is a schematic side view showing an embodiment of the present invention, and FIG. 3 is a perspective view showing the tape former. 1...Striatal body, 4...Segmentation plate, 5...Cap, 7
...Pre-twister, 8...2-degree twisting device, 9...
... Winding device, 22 ... Tape former, 23 ... Tape head, 24 ... Tape pad, 25 ... Tape, 26 ... Unwound yarn, 27 ... Thread winding device.

Claims (1)

[Claims] 1. A plurality of filaments such as strands and intervening wires are bundled through a separating plate and a cap, and the bundled filaments are subjected to primary twisting in a primary twisting device and a stage subsequent to the primary twisting device. Rotation speed is lower than the device 2
In a twisting machine configured to perform twisting using a secondary twisting device, between the spinneret and the primary twisting device,
A tape former having a slit formed on the outer periphery through which the twisted filament is inserted and a tape to be wound around the filament is inserted is disposed, and a tape feeding device for feeding out the tape toward the tape former is attached to the filament body. A wire twisting machine characterized by being arranged separately from the wire.