JP2573579Y2 - Non-laminated part detector for laminated tape - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting a non-laminate portion which is a defect of a laminate tape fed from a laminate tape supply device in a manufacturing process of a laminate sheath cable.

[0002]

2. Description of the Related Art As shown in FIG. 5, a laminated sheath cable is formed by vertically attaching a cable core 21 to a tubular shape with a laminate tape 22 and further covering the outer periphery with a jacket 23.

[0003] Such a laminated sheath cable is manufactured by the following procedure. In FIG. 6, an aluminum core 22a is formed by running the cable core 21 on a cable core 21 in which an insulated core wire is star-twisted or pair-twisted, which is collectively twisted, and a tape is wound thereon.
The laminated tape 22 of the polyethylene layer 22b is formed into a cylindrical shape with the polyethylene layer 22b facing outward, and the both edge overlapping portions 24 of the laminated tape 22 are pressed and adhered, and further thereon an extruder is used. A polyethylene jacket (not shown) is extrusion-coated, and the polyethylene layer 22b of the laminate tape 22 and the inner surface of the jacket are fused by heat at the time of molding.

[0004] As shown in FIG. 7, the lamination tape 22 is supplied to the cable core 21 so that the lamination tape 22 is alternately fed from two lamination tape stands 25. In other words, the end of the fed laminated tape and the leading end of the next laminated tape are connected to be continuously fed. Therefore, a connection device 26 and an accumulation box 27 are provided, and these constitute a laminate tape supply device.

Prior to the connection of the laminate tape, it is necessary to detect the end mark of the laminated tape 22 that is being fed. Therefore, a non-laminated portion, that is, a portion of only the aluminum tape is provided about 7 m before the end of the laminated tape 22, and a device 28 for detecting the non-laminated portion is provided on the line of the laminated tape supply device. When the non-laminating unit detecting device normally provided between the laminate tape stand 25 and the connecting device 26 detects the end of the laminating tape, the connecting device 26
At the end and connected by welding to the tip of the subsequent laminating tape. During this connection operation, the laminate tape stored in the accumulation box 27 is paid out.

FIG. 8 shows a known non-laminated portion detecting device 28. As shown in FIG. A ring-shaped electrode 42 is provided on a shaft 41 supported by a frame (not shown) via a bearing 40 via an insulating material 43, and a well-known slip ring / brush 44 (rings 44a and 44b) is provided on the electrode 42, not shown. The detection lead wire is connected, and as shown in the figure, the electrode 42 comes into contact with the resin layer of the laminated tape 22 fed out, and when the non-laminated portion arrives, both electrodes 42 are interposed via aluminum of the metal sheet. It becomes a conductive state and emits a signal.

[0007]

The detection device 28 cannot detect a defective portion of the laminated tape, that is, a non-laminated portion of the laminated tape during the production of the laminated sheath cable, unless it is in contact with the ring-shaped electrode 42. There is. Particularly, a minute non-laminate portion cannot be detected even more. Therefore, when the non-laminated portion passes without being detected, the cable core is vertically attached with a laminating tape to form a tubular shape, and the overlapping portion at both ends of the laminating tape is heated by a heating means,
Even when pressed with a roller, if the polyethylene portion is missing, there is a problem that the laminated tapes may not be adhered to each other or may be insufficiently adhered.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to detect a non-laminated portion of a laminated tape on almost the entire surface. An object of the present invention is to provide a device for detecting a non-laminated portion of a laminated tape which can be easily adjusted in response to a change in width.

[0009]

In order to achieve the above-mentioned object, a non-lamination detecting device of the present invention is a non-laminating detecting device provided in a supply device for feeding out a laminate tape having a resin layer on the surface of a metal tape. A first electrode for the metal tape, a second electrode for the resin layer, and a continuity detector between the first and second electrodes.
The electrode is characterized in that the conductive fibers are implanted in rows and formed of brushes with variable row width. The brush tip is preferably formed in at least one mountain shape.

[0010]

When the resin layer of the laminate tape has a defect such as partial omission, the brush of the second electrode comes into contact with the metal tape, conduction occurs with the first electrode of the metal tape, and the defect is detected. Further, since the row width of the brush of the second electrode is variable, the width is adjusted with respect to the change in the width of the laminating tape, and the non-laminated portion is detected over the entire width of the laminating tape. If the brush tip has a mountain shape, the conductive fibers can easily enter the non-laminated portion.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the non-laminated portion detecting device of the present invention.

In FIG. 1, a non-laminated portion detecting device 1 is provided so as to be capable of contacting a metal sheet 22a of a laminating tape 22 with a first electrode 2 and a resin layer 22b. Second electrode 3 and first electrode 2
And a conduction detector 4 connected to the second electrode 3. The detection device 1 is provided between the laminate tape stand 25 and the connection device 26 in the supply device of FIG.

The second electrode 3 has a center brush 5, a right brush 6, and a left brush 7, which are attached to both sides of a plate 8a so as to overlap in the traveling direction of the laminate tape 22. The center brush 5 is fixed to the plate 8a, while the left and right brushes 6, 7 are elongated holes 6a, 7
a allows the laminate tape 22 to slide in the width direction. The brushes 2, 5, 6, and 7 in which the first electrode 2 has a single brush fixed to the plate 8a have the same structure, and a large number of conductive fibers 10 such as carbon fibers are provided on the substrate 9. It was planted in rows.

The conduction detector 4 has conductors 11 and 12 to which a low voltage is applied, and can not only detect conduction between the conductors 11 and 12 but also measure a current value during conduction. Conductor 11
Is connected to the brush of the first electrode 2, and the conducting wire 12 is connected to each of the center brush 5, the right brush 6, and the left brush 7. Therefore, if the laminate tape 22 has a non-laminated portion, a current flows through the conductive wire 12 → the second electrode 3 → the metal sheet 22a → the first electrode 2 → the conductive wire 11, and the presence of the non-laminated portion can be detected. The current value is large at the terminal portion where the non-laminated portion is the entire surface of the metal sheet, but the current value is small at the small non-laminated portion having a pinhole shape.
The continuity detector 4 has alarm means for a buzzer 4a and a patrol light 4b. The continuity detector 4 distinguishes a terminal or a defect and informs an operator. In this case, remove the part and connect it.

When the diameter of the cable core changes, the width W1 of the laminate tape 22 necessarily changes.
In order to detect the non-laminated portion over the entire width of the laminating tape 22, the conductive fibers 10 of the brushes 6 and 7 of the second electrode 3 need to be moved to the end as much as possible. There is fear. Therefore, the second
The width W2 of the electrode 3 is variable. The bolts between the substrate 9 and the plate 8a are loosened, and the positions of the brushes 6 and 7 are adjusted so that the conductive fibers 10 are moved to the end so that they do not protrude from the laminate tape 22.

FIG. 2 shows another second embodiment in which the width can be easily adjusted.
It is a top view of an electrode. The right brush 6 and the left brush 7 are screwed together with a rotating shaft 13 having a right screw 13a and a left screw 13b. The right brush 6 is restricted in axial movement by a left screw 13b, and the left brush 7 is a right screw 13a. Is restricted to axial movement. Note that the center brush 5 is fixed. When the handle 13c of the rotating shaft 13 is rotated, the left and right brushes 6 and 7 approach or separate from each other, and the entire width W2 thereof is variable while maintaining the center line. Therefore, if the running center of the laminate tape 22 is determined, separate adjustment of the left and right brushes 6 and 7 is unnecessary, and the entire width W2 corresponding to the width of the laminate tape 22 can be easily set.

FIG. 3 is a perspective view of still another second electrode.
FIG. 1A is an overall view, and FIG. 1B is XX of FIG.
It is a figure which shows a stopper in sectional drawing. In FIG. 1A, a single brush 16 is erected on a table 15 rotatable about a shaft 14 so as to cross the shaft 14. Concave portions 15a are provided on the outer periphery of the table 15 at equal intervals of the central angle θ, and a stopper 17 for the concave portion 15a is fixed to an appropriate frame. FIG.
As shown in FIG.
7a is urged in the projecting direction by a spring 17b. When a rotational force is applied to the table 15, the spring 1
The projection 17a retracts by overcoming the urging force of 7b, and the table 15 rotates to be stabilized in the next concave portion. For example, when the brush 16 having the full length L is rotated by an angle θ from a position where the brush 16 is disposed at a right angle to the laminating tape 22, the width of the brush is reduced to (L × COSθ). Thus, the brush width corresponding to the width of the laminate tape 22 can be easily set only by the operation of rotating the table 15.

FIG. 4 is a perspective view of a brush for forming the second electrode. Normally, a large number of conductive fibers are cut into a rectangular cross section at the tip of the brush. However, some non-laminated parts to be detected are pinhole-shaped, and all the conductive fibers at the tip of the rectangular cross section are bent at the same time. May not be detected. Therefore, as shown in FIG. 4, the tips of the conductive fibers 10 constituting the brush are trimmed, the cross section is formed in a mountain shape, and two ridges 18 and 19 are further provided. At the tips of the hills 18 and 19, the conductive fiber 10 is partially bent easily, and the conductive fiber 10 is easily inserted into the pinhole-shaped non-laminated portion. When the number of peaks is increased as in the peaks 18 and 19, there is a possibility that a pinhole-shaped non-laminated portion that cannot be detected in one peak is detected in another peak.

[0019]

[Effect of the Invention] The non-laminated portion detection device of the present invention
The second electrode has conductive fibers implanted in a row and is formed by a brush having a variable row width. If the resin layer of the laminate tape has a defect such as a partial omission, the brush of the second electrode is damaged. When the metal tape is touched, conduction occurs with the first electrode of the metal tape, and a defect is detected. Therefore, a minute non-laminated portion can be detected over the entire width of the laminated tape. In this case, the trouble that the laminated tapes are not adhered to each other or the adhesion becomes insufficient can be prevented beforehand. Also, the second
Since the width of the electrode brush is variable, the width of the electrode brush can be easily adjusted in response to a change in the width of the laminating tape. Further, when the brush tip is formed in a mountain shape, the conductive fiber easily enters the non-laminated portion, and accurate detection can be performed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a non-laminated portion detection device of the present invention.

FIG. 2 is a top view of another second electrode.

FIG. 3 is a view showing still another second electrode.

FIG. 4 is a perspective view of a brush tip forming a second electrode.

FIG. 5 is a sectional view of a laminated sheath cable.

FIG. 6 is a view showing a manufacturing process of the laminated sheath cable.

FIG. 7 is an overall configuration diagram of a laminate tape supply device.

FIG. 8 is a cross-sectional view of a main part of a conventional non-lamination portion detection device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Non-lamination part detection apparatus 2 1st electrode 3 2nd electrode 4 Continuity detector 6a, 7a Elongated hole (variable width structure) 10 Conductive fiber 18, 19 Mountain

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A-49-30087 (JP, A) JP-A 3-57660 (JP, U) JP-A 56-59657 (JP, U) JP-A 60-60 7063 (JP, U) Jiko 29-992 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01N 27/00-27/10 G01N 27/14-27/24 G01N 27/92

Claims (2)

(57) [Scope of request for utility model registration] 1. A non-lamination detection device provided in a supply device for feeding out a laminate tape having a resin layer on the surface of a metal tape, comprising: a first electrode for the metal tape; a second electrode for the resin layer; A non-laminating portion of a laminating tape, wherein the second electrode is formed by a brush in which conductive fibers are implanted in rows and the row width is variable. Detection device. 2. A non-laminated portion of a laminate tape according to claim 1, wherein the brush has the conductive fibers planted in a row, and the tip of the brush is formed in at least one mountain shape. Detection device.