JPH0427645B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an interlock armor manufacturing apparatus particularly suitable for flat cables having a flat cross section.

[Conventional technology]

An example of a conventional interlock armor manufacturing apparatus will be described with reference to FIGS. 4 and 5. The cable 1 runs along the center axis of a hollow rotating main shaft 106 while its running position is regulated by a die 105. And the rotating plate 10 at the tip of the rotating main shaft 106
By rotating a head 108 which is attached via a screw shaft 109 so that the angle of inclination can be adjusted at 7, an interlock armor 3 formed of a metal tape 2 is wrapped around the outer periphery of the cable 1. A pair of forming rolls 104A, 1 for forming the metal tape 2 by folding it in steps so as to form the interlock armor 3.
04B is rotationally driven by a forming roll rotation shaft 112 through a gear train of a sun gear 110 provided on the outer periphery of the rotation main shaft 106 and a planetary gear 111 having a shaft perpendicular to and passing through the rotation plate 107. Note that the winding tension of the metal tape 2 is adjusted by the brake device 113.

The above-mentioned interlock armor 3 has a metal tape 2 having a rectangular cross section, as shown in FIG.
, by the pair of forming rolls 104A and 104B of the interlock armor manufacturing device, so that the ridge side portion 21 and the valley side portion 22 extend in parallel in the longitudinal direction, as shown in FIG. It is formed by step-folding the central part and wrapping it around the outer periphery of the cable 1 running near the die 105. At this time, the metal tape 2 is folded in steps.
The peak side part 21 is the valley side part 2 of the already wrapped metal tape 2 that has been wrapped one turn before the outer circumference of the cable 1.
Ideally, as shown in FIG. 6, the cables are wrapped in a lap so as to rest on top of the cables 1, and are aligned in the longitudinal direction of the cables 1 with a constant helical outer diameter as shown in FIG. It is attached to the

[Problem to be solved by the invention]

When a conventional interlock armor manufacturing apparatus is used, when the cable 1 is a round cable with a relatively small diameter and a circular cross section, or a flat cable with a flat cross section, the cable 1 is manufactured as shown in FIG. As the wrapping of the metal tape 2, which has been folded in stages, progresses, the wrapped metal tape 2 separates radially outward from the outer periphery of the cable 1, and the interlock armor 3 rises from the outer periphery of the cable 1. The inconvenience of gaining weight arises.

The reason for this will be explained with reference to FIG. 8. Since the metal tape 2 is formed by folding in steps at approximately the center in the width direction, when it is wrapped around the outer periphery of the case 1 as the interlock armor 3,
The peak side portion 21 and the valley side portion 22 are shifted in position in the radial direction by approximately the thickness of the metal tape 2, and as a result, the outer diameter D of the peak side portion 21 is the outer diameter d of the valley side portion 22.
It is approximately 2 tons larger than the previous year. Therefore, it is impossible for the metal tape 2 of the same length to make one complete turn at circumferential positions with different outer diameters. It is clear that there is a lack of quality.

Therefore, when actually winding the metal tape 2, as shown in FIG. The winding is performed by going around the circumferential position having an average diameter Dm of the outer diameter D of the mountain side part and the outer diameter Dm of the valley side part. The next turn of the metal tape 2 rests on this raised valley side 22 and is wrapped in the same slanted position, so that the metal tape 2 becomes more and more of the cable as shown in FIG. The interlock armor 3 as a whole cannot come into close contact with the outer periphery of the cable 1 and floats up, gradually becoming thicker.

This floating phenomenon of the interlock armor 3 tends to be more pronounced as the cable 1 has a smaller diameter. This is because the degree of difference between the outer diameter D of the mountain side and the outer diameter d of the valley side, which causes the lifting, is (D−
This is because the value of d)/d=2t/d increases as the valley side outer diameter d becomes smaller. For this reason, it goes without saying that in the case of a small cable 1 with a diameter d=(=2r) shown in FIG. 10a, the radius of curvature r of the side edge 10A is generally round as shown in FIG. 10b. In the case of a flat cable 10 having a flat cross section which is smaller than that of the cable, the tendency of the interlock armor to rise is even stronger.

[Means to solve the problem]

This invention relates to a manufacturing device for interlock armor for flat cables, which was developed to solve the above-mentioned problems. a step-folding device that folds the cable into steps at substantially the center in its width direction so as to extend parallel to each other; a rolling device that rolls the mountain side portion in its longitudinal direction; and a rolling device that wraps the metal tape around the outer periphery of the cable. A winding device having a winding head for attaching the metal tape is arranged sequentially in the direction of flow of the metal tape, and a sliding clutch device is provided between the step folding device and a driving side for rotationally driving the folding device. It is the composition.

[Effect]

The reason for the lifting of the interlock armor is that the peak side of the metal tape formed in steps by the step folding device is π(D-d) per turn with respect to the valley side during wrapping by the winding device. This is because the length is insufficient by the length of the valley side, so the length of the valley side is reduced by rolling the mountain side using a rolling machine.
If it is doubled, the lengths of the mountain side and the valley side will be πD and πd for each turn, and the cable can be wrapped around the outer circumference without too much or too little at the radial position of the mountain side and the valley side, respectively. This makes it possible to prevent the interlock armor from lifting up. In particular, in the case of a flat cable with a flat cross section, the amount of metal tape taken off periodically fluctuates greatly during the winding rotation of the winding head. Absorbs and forms good interlock armor.

〔Example〕

An embodiment of the invention will be described with reference to FIGS. 1 and 2. FIG.

FIG. 1 conceptually depicts each device arranged along the flow of processing the metal tape 2.
Step-folding device 4 that folds the metal tape 2 in steps
is first set up.

This step-folding device 4 is composed of a pair of step-folding rolls 4A and 4B, and is driven by a drive shaft 7 which is rotated by a suitable prime mover 9 such as a motor via a power transmission member 9A such as a timing belt or chain.
is driven in rotation via a sliding clutch device 8, such as a powder clutch.

This step-folding device 4 is not particularly different from the step-folding rolls 104A and 104B of the conventional device shown in FIG. It is folded and formed into the step-fold shape shown in .

The rolling device 5 consists of a pair of rolling rolls 5A and 5B, and the rolling device 5 consists of a pair of rolling rolls 5A and 5B.
1 is rolled in the longitudinal direction, and its length is increased by the already explained magnification compared to that of the valley side portion.

The rolling rolls 5A and 5B of this rolling device are not driven to rotate themselves, but rotate as the metal tape 2 is taken up from the winding device.

Metal tape 2 subjected to predetermined processing by the above-mentioned step folding device 4 and rolling device 5
is wrapped around the flat cable 10 by a wrapping device including a wrapping head 6. The structure of the winding device is also not particularly different from that of the prior art described with reference to FIGS. 4 and 5.

Now, the significance of the slip clutch device 8 will be explained below with reference to FIG.

Figure a shows flat cable 1 from metal tape 2.
This diagram schematically depicts the state in which the winding head 6 is wound on the winding head 6, and points P, Q, and S are points on the locus circle of the winding head 6. From this figure, when the winding head 6 rotates 1/4 turn from point P to point Q, the metal tape 2
While the winding length of is a short part of the arc along the outer circumference of the flat cable 10,
The winding head 6 moves from point Q to point S to the next same 1/
It can be seen that during four rotations, only the long periphery including the straight side edges of the flat cable is wrapped. In the next 1/4 turn of the winding head 6, the metal tape 2 returns to its original length, and in the next 1/4 turn, it becomes longer again. The amount fluctuates greatly periodically. In the case of the illustrated flat cable 10, if a trial calculation is made assuming d=1, this amount will be a large fluctuation of about five times.

On the other hand, as shown in FIG.
When the cable to be wound is a round cable 1 with a circular cross section, the winding head 6 only needs to rotate coaxially with the cable 1, and the amount of metal tape 2 to be wound is always equal to that of the winding head 6. It is proportional to the rotation angle, and the amount of take-up does not fluctuate as in the case of the flat cable 10.

The sliding clutch device 8 therefore serves precisely to absorb periodic fluctuations in the amount of metal tape 2 taken up, which occur in the case of this flat cable 10.

In other words, the drive speed of the prime mover 9 is the same as that of the metal tape 2.
The setting is such that the metal tape can be folded into stages slightly faster than the maximum take-up speed at which the metal tape 2 can be taken up, and even when the winding head 6 moves between points QS in Fig. 3 and the running speed of the metal tape 2 reaches its maximum, it will not slip. The clutch device 8 is balanced by slightly slipping and transmitting the driving force. Of course, when the winding head 6 moves between points PQ and the running speed of the metal tape 2 decreases, the amount of slippage of the slip clutch device 8 also increases accordingly.

In addition, it is preferable to set the torque for feeding out the metal tape 2 to a small value so as to give back tension to the metal tape 2 during winding in a downstream winding device.

The sliding clutch device 8 thus plays a special role in forming the interlock armor on the flat cable 10.

In addition, as already seen, prevention of the lifting phenomenon of the interlock armor is achieved by
The metal tape 2 is formed into a step fold at approximately the center in the width direction so that the metal tapes extend parallel to each other in the longitudinal direction.
This is sufficiently achieved by rolling only the mountain side portions 21 of 2 to a length D/d times the length of the valley side portions 22 using the rolling device 5.

〔effect〕

According to the present invention, the crest side portions and the trough side portions of the step-folded metal tape have circumferential lengths that correspond to the radial positions of the outer circumferential portions of the respective cables to be wound by rolling the crest side portions. Therefore, it is possible to form an interlock armor that is closely attached to the outer circumference of the cable and does not lift up.
And in particular, it provides good interlock armor for flat cables, since the presence of the sliding clutch device effectively absorbs periodic fluctuations in the take-up speed of the metal tape that are found when wrapping flat cables. Can be worn.

[Brief explanation of drawings]

Fig. 1 is a conceptually simplified side view showing one embodiment of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Figs. 3 a and b are a flat cable with a flat cross section and a cross section. Simplified front view illustrating how the metal tape is wrapped around the circular cable, No. 4
The figure is a side sectional view showing an example of a conventional interlock armor machine, FIG. 5 is a front view of the same, FIG. Figures a and b are cross-sectional views showing the metal tape before and after forming, Figure 8 is an enlarged side sectional view to explain the cause of the lifting phenomenon of the interlock armor, and Figure 9 shows the lifting state of the interlock armor. The side sectional views and FIGS. 10a and 10b are cross-sectional views showing an example of a cable provided with an interlock armor. 2...Metal tape, 4...Step folding device, 5
... Rolling device, 6 ... Winding head, 8 ... Slip clutch device, 10 ... Flat cable, 21
...Mountain side part, 22...Valley side part.

Claims (1)

[Claims] 1 A stepped folding device 4 that is rotationally driven and forms a metal tape 2 for armor into steps at approximately the center in the width direction so that the peak side portions 21 and the valley side portions 22 extend in parallel in the longitudinal direction. A rolling device 5 is disposed downstream of the step folding device 4 and rolls the mountain side portion 21 in its longitudinal direction, and a rolling device 5 is disposed downstream of the rolling device 5 and It consists of a winding device having a winding head 6 for winding the tape 2 around the outer periphery of the flat cable 10, and a slipping clutch device 8 located between the stepped folding device 4 and the driving side that rotationally drives it. A manufacturing device for interlock armor for flat cables, which is characterized by: