JPH0586607B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a reversal twisting device for a cable with alternatingly reversingly twisted strands, and more specifically, to a reversing twisting device for a cable with alternately reversingly twisted strands. This invention relates to a reversal twisting device that can easily change the left and right twisting angle.

[Prior Art] For example, communication cables that connect telephone stations require branching in the middle of the connection line or insertion of a relay amplifier. When performing such work, considerable tension is applied to the communication cable when taking out the wire pairs and ends at the above-mentioned branching and insertion points, so the internal core wires and If there is no slack in the group of wires in the cut, the above-mentioned work will be extremely difficult.

Therefore, in the above-mentioned communication cables, so-called slack cables are used in order to provide slack to the core wire group and to allow the twisted strands to become slack and be taken out when the cable sheath is cut open. It is used.

In addition, for electrical shielding, there is a so-called cable with a shield wire, which has a wrapping layer of metal wire such as copper wire or aluminum wire on the outside, or a cable with a wrapping iron wire on the outside for mechanical protection. In so-called armored iron wire cables, etc., the winding direction is reversed at arbitrary intervals to prevent bending of the metal wire winding layer when the cable is bent.

Further, in such a cable with alternately reversely twisted wire members, the number of turns of each reversely twisted portion cannot be set uniformly depending on the diameter and number of wire rods.

Therefore, it is desirable to freely change the number of windings of each of the reversely twisted portions. In order to meet this requirement, conventionally, a detection plate formed by being connected to a reversing head for twisting the filament and two sensors for detecting the rotation of this detection plate are provided. The sensor is installed on a locus on an outer circle that has the same center point as the detection plate.

The angular position of the detection plate, which rotates in conjunction with the rotation of the reversing head, is detected by the two sensors described above, and the forward and reverse rotation of the reversing head, etc., is controlled based on the detection results.

[Problems to be Solved by the Invention] In such a conventional reversal twisting device for cables with alternately reverse twisted wire bodies, the starting point of the reversing head for twisting the filament, that is, the winding around the cable surface, The winding layer of iron wire and copper wire etc. is not calculated as the forward/reverse angle from the center point of the trajectory on the outer circle that has the same center point as the two sensors mentioned above, but simply The angle between the sensors is used as the twisting angle during work.

However, in reality, it is difficult to accurately stop the reversing head at the desired positions of the two sensors described above, and the actual reversing angle tends to exceed the sensor position due to the delay in the stopping operation of the reversing head.

Furthermore, slippage of the reversing clutch or unbalance of the reversing head may cause misalignment of the shaped waveform (approximately sine curve) of the filament with respect to the cable center line.

However, with conventional reversal twisting devices for cables with alternating reversal twisted wire bodies, the actual deviation of the waveform with respect to the cable centerline is not detected, and numerical estimation cannot be ascertained. There is a problem in that it takes a lot of time to repair the cable.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the problems of the prior art and to provide a reversal twisting device for cables with alternately reverse twisted wire bodies that can easily detect and control each forward and reverse angle. It is.

[Means and effects for solving the problems] In order to achieve the above-mentioned object, the present invention provides a reversal twisting device that winds a large number of filamentary bodies alternately in the S and Z directions on the outer periphery of a central cable. A reversing clutch that rotates the reversing head forward and backward for reversing the twisting of the filament, and a rotation information detector that detects the rotation direction and rotation angle corresponding to the rotation of the reversing head in correspondence with the number of pulse signals. an origin detector for detecting the center of a waveform generated when the filament is wound around the outer periphery of the central cable; and a control means for controlling the reversing clutch based on the output of the rotation information detector. The present invention is characterized in that it is configured to have the following features.

[Example] Fig. 1 is a perspective view showing an example of a reversal twisting device for a cable with alternately inverted twisted wire bodies, and Fig. 2 is a configuration diagram showing an example of a control section used in the device. be.

In FIG. 1, a cable 1 sent out from a not-shown sending out machine passes through the centers of a collecting batten 3, a guide tube 4, and a reversing head 5 in sequence, and from the upstream side, an alternately reversing stranded wire is formed as a finished product. A cable with a strip is arranged to be sent out. Each of the plurality of shield wires 2 forming the cable 1 is connected to each eye hole 3 of the collective eye board 3.
a, and when exiting from the circumferential surface of the guide tube 4 to the eye hole 5a of the reversing head 5, it is twisted back onto the cable surface alternately in clockwise and counterclockwise directions. Next, to prevent the untwisted cables from returning to their original state, the twisting device 7 feeds the untwisted cables to the opening of the taping device 8, and the taping device 8 alternately tapes the untwisted cables onto the surface of the cable by appropriate means. , finally as a finished product, code 1'
A cable with alternately reversely twisted strands as shown in is obtained.

In the reversing drive unit 6, as shown in FIG. 2, the rotation of the power source is first transmitted to the line shaft 9, and the rotation of the line shaft 9 is transmitted to the reversing clutch 11 by appropriate means. . Via this reversing clutch 11, the above-mentioned reversing head 5 is rotated. A brake 10 is provided on the reversing head 5 either directly or through an appropriate means, so that quick stop control can be performed. A pulse plate 12 for detecting the rotation angle is connected to a member synchronized with the rotation of the reversing head 5. This pulse plate 12 has a plurality of slits equally divided around its circumference, and two slits are formed around the pulse plate 12 to detect the presence or absence of the slits.
Two sensors 13 and 14 are arranged with an output phase difference of, for example, 90 degrees. This sensor 13,
14, each connected to a rotation information detector 15,
The rotation information detector 15 uses the rotation direction information and rotation angle information of the pulse plate 12 (pulse plate 12
The pulse signal S1 is generated only when the pulse plate 12 rotates in the normal direction and the shield wire is twisted in the normal direction around the cable. The pulse signal S2 is generated only when the shield wire is twisted in the reverse direction with respect to the cable. The pulse signals S1 and S2 output from the rotation information detector 15 are sent to the AND gate 2 in the forward twist setting device 16 and the reverse twist setting device 17, respectively.
0 and 21, respectively.

Further, at the origin position of the reversing head 5, that is, the origin position of the pulse plate 12, an origin detection plate 1 is placed in advance.
8 is fixed so as to coincide with the center position of the twisted wave shape of the cable. The passing position of this origin detection plate 18 is also detected by a sensor 19.

The output of this sensor 19 is input to a flip-flop 22, and each time the sensor 19 detects the position of the origin detection plate 18, signals S5 and S6 are input.
A latch signal is generated for each. The output of this flip-flop 22 is the signal S
5 and S6 are connected to the above-mentioned AND gates 20 and 21, respectively.

The above-mentioned normal twist setting device 16 has an AND gate 2
0, which receives the pulse signal S1 through the AND gate 20, counts the number of pulses of the signal S3 that has passed through the AND gate 20, and displays the rotation angle corresponding to the rotation angle of the above-mentioned reversing head 5, and also receives the control signal described later. S8 and a control signal S10 are generated.

Further, the above-mentioned reverse twist setting device 17 receives the pulse signal S2 via the AND gate 21, counts the number of pulses of the signal S4 that has passed through the AND gate 21, and adjusts the rotation angle of the above-mentioned reverse twist head 5. It displays the corresponding rotation angle and also generates a control signal S7 and a control signal S9, which will be described later.

Each of the forward twist setting device 16 and the reverse twist setting device 17 has a counter for clearing a count display on the opposite side when the rotation angle of the reversing head 5, which is rotated forward or reversed, reaches a predetermined value. It is designed to send out control signals. That is, when the forward twist setting device 16 becomes a predetermined value, a control signal S8 is sent to the reverse twist setting device 17 side, and conversely, when the reverse twist setting device 17 becomes a predetermined value, the control signal S8 is sent to the reverse twist setting device 17 side. A control signal S7 is sent to the 16 side.

In addition, a control signal S9 from the normal twist setting device 16
The control signal S10 from the reverse twist setting device 17 is
The input signal is input to a non-contact type controller 23, and the output of the non-contact type controller 23 is supplied to the inverting clutch 11.

Therefore, when the pulse plate 12 is rotated in the normal direction as the reversing head 5 is rotated in the normal direction, a pulse is generated in the signal S1 output from the rotation information detector 15. At this time, since the signal S6 output from the flip-flop 22 is latched at the L level and the signal S5 is latched at the H level, the AND gate 21 is open and the AND gate 20 is closed. The input of the signal S1 to the device 16 is blocked.

Further, as the reversing head 5 rotates, the pulse plate 12 rotates, and when the position of the origin detection plate 18 is detected by the sensor 19, the signal S
5, the states of S6 are inverted, and the signal S5 becomes L level and the signal S6 becomes H level. Then, by opening the AND gate 20, the pulse signal S1 is inputted to the normal twist setting device 16 as the signal S3.

From this point on, the pulses of the signal S3 are counted by the forward twist setting device 16, and the rotation angle of the reversing head 5 is sequentially displayed based on this result. Then, when the rotation of the reversing head 5 reaches the first set value,
The non-contact type controller 23 is turned off by the control signal S10 from the normal rotation twist setting device 16, and the clutch which is being driven by the reversing clutch 11 is disengaged.

At the same time, the display on the reverse twist setter 17 is reset by the control signal S8 from the forward twist setter 16.

Thereafter, when the second set value is reached, the non-contact controller 23 is turned on by the control signal S10, and the brake 10 is operated by an appropriate means to apply the brake. After such braking, the non-contact controller 23 is turned off and the brake 10 is released. At the same time, the non-contact controller 23 is turned on by the control signal S9 from the reverse twist setting device 17, and the reverse clutch 11, which had been driven until just before, is switched to the reverse side. , and the reverse operation starts.

At the beginning of this reversal operation, a pulse signal S2 is generated as the output of the rotation information detector 15, but since the signal S5 of the output of the flip-flop 22 is latched at the L level and the signal S6 is latched at the H level, the AND gate 20 is ANDGATE 21 in an open state
is in the closed state, so the reverse twist setting device 1
7, the input of the signal S2 is blocked.

Further, as the reversing head 5 rotates, the pulse plate 12 rotates, and when the position of the origin detection plate 18 is detected by the sensor 19, the signal S
5, the states of S6 are inverted, and the signal S5 becomes H level and the signal S6 becomes L level. Then, by opening the AND gate 21, the pulse signal S2 is inputted to the reverse twist setting device 17 as a signal S4.

From this point on, the pulses of the signal S4 are counted by the reverse twist setting device 17, and the rotation angle of the reverse twist head 5 is sequentially displayed based on this result. Then, when the rotation of the reversing head 5 reaches the first set value,
The non-contact type controller 23 is turned off by the control signal S9 from the reverse twist setting device 17, and the reverse twist clutch 1 is turned off.
Disengage the driving clutch in step 1.

At the same time, the display on the forward twist setting device 16 is reset by the control signal S7 from the reverse twist setting device 17.

Thereafter, when the second set value is reached, the non-contact type controller 23 is turned on by the control signal S9, and the brake 10 is operated by an appropriate means to apply the brake. After such braking, the non-contact controller 23 is turned off and the brake 10 is released. At the same time, the non-contact type controller 23 is turned on by the control signal S10 from the normal rotation twist setting device 16, and the inversion clutch 11, which had been driven until just before, is turned on. The rotation side is switched to the forward rotation side, and normal rotation operation starts again.

By repeating these operations, a cable with alternatingly reverse twisted strands is produced.

Here, if the wave shape of each of the reverse twists in the cable with alternately reverse twisted wire bodies is no longer the desired one due to slipping of the reverse clutch 11 or imbalance of the reverse head 5, the normal twist setting is performed. By simply changing the respective setting values of the forward twist setting device 16 and the reverse twist setting device 17, the generation timings of various control signals sent from the forward twist setting device 16 and the reverse twist setting device 17 can be changed. The substantial length of the reverse twist of the cable with alternate reverse twist strands can be varied. That is, if a large number of settings are set in the forward twist setting device 16 and the reverse twist setting device 17, the pulse signal S1 and the pulse signal S2
The pulse plate 12 is rotated until the number of pulses increases, and the above-mentioned reversing head 5 can be rotated accordingly.

On the other hand, contrary to the above, if the setting values of the forward twist setting device 16 and the reverse twist setting device 17 are set to a small value,
In the same manner as described above, it is possible to shorten the length of each of the reverse twists of the cable with alternately reverse twist wire bodies.

Furthermore, by adjusting the set values of the forward twist setting device 16 and the reverse twist setting device 17 separately, it is possible to set the left and right imbalance of the waveform.

[Effects of the Invention] As described above, according to the present invention, since the origin position detector is provided and the origin position of the waveform of the cable is constantly detected, it is possible to detect problems caused by slippage of the clutch, imbalance of the reversing head, etc. This has the effect that there is no misalignment of the shaped waveform of the filament with respect to the center of the cable.

In addition, if for some reason there is a deviation in the wave shape of the filament with respect to the center of the cable, the forward and reverse rotation angles can be numerically determined, making it extremely easy to correct the problem. There is also.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a reverse twisting device for a cable with alternately reverse twisted wire bodies according to the present invention;
FIG. 2 is a schematic diagram showing an example of the control means of the reversal twisting device for the cable with alternately reversible twisted wire bodies shown in FIG. 1. DESCRIPTION OF SYMBOLS 1... Cable, 2... Shield wire (striate body), 5... Reversing head, 11... Reversing clutch,
15... Rotation information detector, 16... Forward twist setter, 17... Reverse twist setter, 18... Origin detection plate (origin detector), 19... Sensor (origin detector).

Claims (1)

[Claims] 1. A large number of filament bodies are arranged on the outer periphery of the central cable.
A reversing twisting device that alternately winds the filament in the Z direction includes a reversing clutch that rotates the reversing head in the forward and reverse directions for reversely twisting the filament, and a rotation direction and rotation angle corresponding to the rotation of the reversing head that are generated as pulses. A pulse plate, two sensors arranged with a desired 90 degree phase difference in the slits of this pulse plate, and pulse signals from these sensors are input to a rotation information detector to obtain the above information. a rotation information detector that detects the direction and angle of rotation corresponding to the rotation of the reversing head; and an origin detection plate and sensor that detects the center of a waveform that is generated when the filament is wound around the outer circumference of the central cable. An apparatus for reversing a cable with alternately reversing twisted wire bodies, comprising: an origin detector comprising: a control means for controlling the reversing clutch based on the output of the rotation information detector;