JPS6347087B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of vertically applying a tape such as an aluminum tape, copper tape, or aluminum plastic laminate tape on a cable core and forming the tape into a cylindrical shape.

In the process of vertically attaching the tape around the cable core and forming a cylinder into a cylinder, in the method of using a conical and cylindrical die 4 as shown in FIG.
Hold the cable core 1 at the tape so that the weight of the cable core is not added to the tape, and make fine adjustments so that the linear object is inserted into the center of the die 4 so as not to hit the top surface of the die 4. Was.

However, if the compound is applied to the surface of the wire, such as when manufacturing a waterproof cable in which a waterproof compound is filled or applied between and on the insulated core wires, the receiving roller 3 and the presser roller 3' The compound is wiped off by the tape 2, which causes waterproofing failure, and the wiped compound falls onto the tape 2, causing an excessive amount of compound to be applied locally, causing the compound to overflow from the overlapping part of the tape 2, causing problems in the next process. The polyethylene sheath is defective.

Further, the height of the rollers 3, 3' can only be adjusted by running the cable core, which requires a long dummy core and causes a large cable loss.

In addition, the height adjustment needs to be aligned with the center of the molding die, and as it is a delicate adjustment, it takes a long time to adjust, and if the adjustment fails, the weight of the cable will be added to the tape, causing vertical wrinkles, etc. Vertical molding was defective.

Note that A, B, and C in FIG. 2 are cross-sectional views of respective portions of FIG. 1 directly above them.

The present invention provides a method for forming a longitudinally spliced tape into a cylindrical shape that eliminates the above-mentioned drawbacks. A receiving plate whose height is adjustable in the longitudinal direction along the tape surface is provided from just before the cable contacts the tape due to its own weight curve to just before the die, and the weight of the cable is continuously maintained while forming the cable into a cylinder.

The present invention will be explained below using FIG.

Conventional receiving roller and presser roller (3, in Fig. 1)
3'), a receiving plate 5 having sufficient rigidity to hold the weight of the cable core 1 is used.

The receiving plate 5 is equipped with a height adjusting device 6, so that the height can be adjusted along the lower surface of the tape during the longitudinal cylindrical forming process of the tape 2.

It is preferable to attach a low-friction material or the like to the upper surface of the receiving plate 5 in order to protect the tape 2.

The length of the receiving plate 5 extends from just before the cable core 1 hangs down due to its own weight and contacts the surface of the tape 2 to just before the entrance of the molding die 4, and may need to be about 1 m or more in length.

To use it, first, form the tape 2 vertically into a cylinder, and then use the height adjustment device 6 on the underside of the tape 2 to attach the receiving plate 5.
Align the cable core with the bottom surface of the tape 2, and then insert the cable core into the die 4.

Since the weight of the cable core 1 is held by the receiving plate 5 and is not directly applied to the molding die part 4,
Damage such as vertical wrinkles does not occur on the surface of the tape 2, and the cable core can be run on the receiving plate 5 due to its own weight, and there is no need to adjust the vertical height of the cable core itself.

In addition, Figure 4 A, B, C, and D are the 3rd row directly above them.
FIG. 3 is a cross-sectional view of each part of the figure.

Further, instead of the receiving plate 5, a group of rollers 7 as shown in FIG. 5 can be used instead.

The advantages of the present invention are as follows: (1) The cable core is held from the bottom surface of the tape, and there is no direct contact with the cable core, such as a roller, so it is easy to apply the compound to the surface of the wire when manufacturing the waterproof cable. Even if the tape is attached vertically to the outer circumference of the cable core, the compound will not be wiped off.
Not only does it have a large effect on improving waterproofness, but the amount of application is made uniform, and the compound does not overflow from the tape overlap area, allowing the next process of PE sheathing to be carried out stably.

(2) Adjustment work does not require passing the cable core through a die; it is only necessary to run the tape and adjust the catch plate or roller group up and down, and it can be done in a short time and easily, improving work efficiency. This greatly contributes to improvement and loss reduction.

(3) The catch plate or roller group is the outer diameter of the cable core,
There is no need to change the tape width, etc., and all sizes can be used in common, improving work efficiency.

etc.

[Brief explanation of drawings]

Fig. 1 is a side explanatory view of the conventional method of forming a vertically attached tape into a cylindrical shape, Fig. 2 A, B, and C are cross-sectional views of each part of Fig. 4A, B, C, and D are sectional views of respective parts of FIG. 3, and FIG. 5 is an explanatory view of the roller group. DESCRIPTION OF SYMBOLS 1... Cable core, 2... Tape, 3... Receiving roller, 3'... Presser roller, 4... Conical and cylindrical die, 5... Receiving plate, 6... Receiving plate height adjustment device, 7...
roller group.

Claims (1)

[Claims] 1. In the process of vertically attaching tape or the like around the cable core to form a cylinder, in a forming method that uses conical and cylindrical dies, the weight of the cable core is not directly applied to the die part through the tape. From just before the cable core contacts the tape due to its self-weight curve until just before it enters the die, a receiver with sufficient rigidity to support the weight of the longitudinally adjustable cable core is installed along the underside of the tape. A method for forming a vertically attached tape onto a cable core into a cylindrical shape, which comprises providing a plate or a group of rollers to form the cable into a cylinder while continuously holding the weight of the cable. 2. A vertically attached tape is formed into a cylindrical shape on a cable core according to claim 1, wherein the receiving plate provided along the lower surface of the tape is treated with a low-friction agent on the contact surface with the tape. how to.