JPH0734618B2 - Metal tube separator - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for separating a metal tube, and in particular, an ultrafine metal tube having an outer cover for covering a core of an electric wire, a cable or the like which is deteriorated in characteristics due to moisture absorption. The present invention relates to a metal tube separating device for stripping off.

[Problems to be Solved by Conventional Techniques and Inventions]

Generally, when a metal tape, for example, an aluminum tape is rolled into a cylindrical shape and its abutting portions are welded to manufacture an aluminum tube, it is possible to reduce the wall thickness and manufacture a small diameter and long one at low cost. The tube manufacturing method has a small diameter wire that may deteriorate in characteristics due to moisture absorption, etc.
It is useful as a skin for moisture-proofing and mechanically protecting a core of a cable or the like (hereinafter referred to as a cable core).

By the way, in the above aluminum tube, a pinhole may be generated in the welded portion due to a slight change in an external factor such as a minute fluctuation of the welding current or a minute vibration of the butted portion. If there is a pinhole that penetrates through the wall thickness of the pipe, moisture inevitably intrudes into the aluminum pipe, and the cable core built in the pipe cannot maintain desired characteristics.

In particular, the linear body containing the above cable core is several 100 m to several
It is 1000 m long, and when defects such as pinholes were found in the pressure resistance test after welding, in many cases, such long filaments had to be discarded. Also,
Japanese Patent Laid-Open Publication No. 12581/1975, Japanese Patent Publication No. 51-716 / 1975, and Japanese Laid-Open Patent Publication No.
-114582, JP-A-50-129898, and JP-A-51-56
The devices disclosed in Japanese Patent No. 983 were known, but in all of these devices, the separated sheath is deformed irregularly in the cross-sectional shape and is easy to cut, and the sheath is used in a winder or the like. And could not be wound compactly.

Therefore, an object of the present invention is to reliably separate (strip) an ultrafine metal tube that does not have watertightness without damaging the internal cable core, and to make the separated and removed metal tube compact. The point is that it can be wound and only the cable core can be taken out and reused.

[Means for Solving the Problems]

The metal pipe separating device according to the present invention has two holes which guide the filaments in which the metal pipes are covered in the linear built-in body in a running state, and are arranged in the same axis center at a small interval. Dies; four cutting blades forming four longitudinal cuts on the outer surface of the metal tube; and; at the small interval between the two dies, the center angle of the cross section is about 90 °. 4) a cutting depth adjusting mechanism for forming the cut lines by bringing the cutting blades closer to the outer surface of the metal pipe from the radial direction;
A metal for separating the metal pipe from the linear built-in body by dividing the metal pipe into two by dividing into a pair of cuts on the opposite side of about 180 ° to form a pair of substantially semicircular portions having an unseparated cut in the center. A pipe tearing mechanism; and the cutting depth adjusting mechanism contacts the linear guide means for roughly feeding the moving table equipped with the cutting blade and the cutting blade with the outer surface of the metal pipe. 4 pieces of locking means for fixing the movable table in the state, and fine cutting means for finely feeding the mounting member to which the cutting blade is directly fixed to the movable table in the fixed locked state. The cutting blades are independently movable; and the metal pipe tearing mechanism separates a pair of substantially semicircular parts separated from the linear built-in object into uncut cuts, respectively. A drive rod that expands and deforms in the center and pulls so as to form a flat two-peak waveform. The flat plastic working mechanism including from the pressing roller, and has.

[Work]

Since the linear body travels while being guided and guided in the holes of the two dies, the linear body (metal tube) is prevented from swinging at a small interval between the two dies. Further, at the small intervals, the four cutting edges approach the outer surface of the metal tube from the four radial directions with the center angle of the cross section of about 90 °, so the pressing force when cutting the cutting edges is uneven. Moreover, the linear body (metal tube) is not bent by the pressing force of the cutting blade. As a result, variations in the cutting depth due to the cutting edge are less likely to occur.

In addition, the cutting depth adjusting mechanism allows the cutting depths of the four cutting blades to be independently adjusted, and the cutting blades are roughly fed by the linear guide means to efficiently cut the cutting blades on the outer surface of the metal pipe. Can be brought into contact, and then the moving table can be locked with a locking hand, and the cutting blade fine movement means can finely adjust the cutting depth with respect to the wall thickness of the extremely thin metal tube. . This makes it possible to continuously form four longitudinal cuts at a center angle of the cross section of about 90 ° pitch while preventing the cutting edge from penetrating the peripheral wall of the metal tube.

In addition, the metal tube tearing mechanism allows the metal tube to
Degree of splitting into two by splitting at a pair of cuts on the opposite side, and a pair of substantially semicircular portions having an unseparated cut in the center thereof are separated and formed without damaging the linear inclusions.

The separated semi-circular portions are expanded and deformed centering on the unseparated cuts by the flat plastic working mechanism of the metal pipe tearing mechanism, and formed into a flat double-peaked waveform in the cross-sectional shape. As a result, the thickness of the flat double-peaked corrugation is reduced, and it can be wound compactly.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating examples.

FIG. 1 is an overall simplified diagram showing a separating device for an ultrafine metal tube. This separating device has a core (cable core) of an electric wire, a cable, etc. which deteriorates its characteristics due to moisture absorption as shown in FIG. 4 mm to 7 mm (outer diameter) for the linear built-in object 1
Filament body 3 covered with ultrafine metal tube 2 of aluminum or the like
Is a device capable of tearing and separating the metal tube 2 from the above. In FIG. 1, the device for separating a metal tube has a filament body 3 wound around it, and is extended. The mechanism 4, the main body 5 having a die and a cutting depth adjusting mechanism, which will be described later, and the metal pipe tearing mechanism 6-provided in the downstream thereof.
In FIG. 1, it is surrounded by a chain double-dashed line-, a waste material winding mechanism 8 that winds the separated metal pipe waste material 7, and a built-in material winding mechanism that winds the linear built-in material 1 for reuse. 9 and.

The linear body feeding mechanism 4 has a bobbin around which the linear body 3 is wound, and applies a constant back tension to the linear body 3.

The built-in object winding mechanism 9 includes a bobbin for winding the linear built-in object 1 and a bobbin (not shown) so that unnecessary pulling force is not applied to the linear built-in object 1 such as a small-diameter cable core, which is weak against pulling force. It has a drive unit.

Now, the main body 5 will be described with reference to FIGS.
As shown in the figure, two dies 11, 11 each having a hole 10 for guiding the linear member 3 in a straight running state are arranged on the same axis center with a small interval A. The two dies 11, 11 have the same shape, the outer peripheral surface 12 at the tip is formed in a tapered shape, the outer flange 13 is provided at the base end, and the hole 10 is gradually expanded in diameter toward the base end. Reference numeral 14 denotes a holding base having an oscillating portion 10a, which integrally includes a disk portion 14a and a cylindrical holding cylinder portion 14b protruding in the center thereof, and a base of the holding cylinder portion 14b. A die insertion portion 15 having a stepped portion 15a in which one die 11 is inserted from the end side and the outer collar portion 13 abuts and is provided, and a cap 16 with a hole is provided at the tip of the holding cylinder portion 14b. To fix the other die 11.

The holding cylinder portion 14b has four rectangular through holes 17 in the middle thereof.
Are provided, and the positions of the through holes 17 substantially correspond to the centers between the tips of the dies 11, 11 facing each other with the small interval A.

Further, this device includes four cutting blades 18 forming four cuts 54a, 54a, 54b, 54b in the longitudinal direction on the outer surface of the metal tube 2,
At a small distance A between the two dies 11, 11, the metal pipe 2 is brought to the outer surface from the four radial directions having a central angle of the cross section of about 90 °, and the cutting edges 18 are brought close to each other to form cuts 54a, 54a, 54b, 54b, and a cutting depth adjusting mechanism 19 ... That is, the cutting edge 18 is held via the cutting depth adjusting mechanism 19.

The cutting depth adjusting mechanism 19 brings the cutting guide 18 into contact with the outer surface of the metal tube 2 (of the linear body 3) and the linear guide means 21 for roughly feeding the moving base 20 having the cutting blade 18 mounted thereon. Mobile stand in the state
The lock means 22 for fixing the 20 and the fine cutting means 53 for finely feeding the mounting member 23 to which the cutting edge 18 is directly fixed to the movable table 20 in the fixed lock state are provided with the above four sheets. The cutting blades 18 are configured so that they can be independently moved.

More specifically, the disk portion 14a is formed with four sloped surfaces 24 so that the angle β in FIG. 3 is about 5 ° to 30 °, and each of the sloped surfaces 24 ... The linear way rail 25 and the angled bracket 26 are fixed to each other. And,
A carriage 27 is reciprocally attached to the rail 25, and the linear guide means 21 is constituted by the rail 25 and the carriage 27, and reciprocates as shown by arrows B and C to move the movable table 20. Rough feed. That is, the movable table 20 is fixed to the carriage 27 by the bolts 28 ...

The movable table 20 has a shape in which a circular hole 29 is provided in a substantially rectangular parallelepiped shape and has a screw hole 30 on the side surface (see FIG. 5).

The bracket 26 is provided with a long hole 31 and further has a handle portion.
A lock bolt that integrally includes 32, a large diameter portion 33, and a bolt portion 34.
35 is provided, and the bolt portion 34 of the lock bolt 35 is attached to the above long hole.
It is inserted into 31 and screwed into the above-mentioned screw hole 30 of the moving base 20 so as to be able to advance and retreat, and the moving base 20 is roughly fed in the direction of arrow B, and the tip of the cutting edge 18 is drawn as shown by the solid line in FIG. When the lock bolt 35 is screwed in after the contact with the outer surface of the metal tube 2,
The large-diameter portion 33 and the end surface are squeezed by the bracket 26 in the vicinity of the long hole 31, and the moving table 20 is fixed by a frictional force. In order to further secure this fixing, the loosening prevention nut material 36 is screwed into the bolt portion 34, and the end face of the large diameter portion 33 and this nut member 36 make the bracket 26 clasped. The case of holding and fixing is shown in the example of the figure.

In this way, the lock bolt 35, the screw hole 30, the bracket 26 with the elongated hole 31, the nut member 36, and the like constitute the locking means 22.

Then, the bush 38 with the inner flange 37 is inserted and fixed in the circular hole 29 of the moving table 20, and inside the bush 38,
A rotary shaft 40 having an extremely small bitch screw hole 39 is fitted, and the rotary shaft 40 has a large diameter portion having the screw hole 39.
41 and a small-diameter handle mounting shaft portion 42 projecting from this, the stepped portion approaches or abuts the inner flange 37 of the bush 38, and the outer peripheral groove 43 of the large-diameter portion 41, The tip of a stopper bolt 44 that prevents movement in the axial direction and allows free rotation around the axial center is projected. Further, a handle 46 having a scale 45 on the outer periphery is fixed to the handle mounting shaft portion 42 of the rotary shaft 40 by a key connection or the like, and a fixed pointer 47.
Is fixed to the moving table 20 in correspondence with the scale 45 of the handle 46.

Then, the mounting member 23, a male screw portion 48 that is screwed into the screw hole 39 of the rotating shaft 40 so as to advance and retract, and a large-diameter sliding portion 49 that is reciprocally fitted to the inner surface of the hole of the bush 38, Cutting edge mounting part 50
And a slide key 51 for stopping rotation is provided between the large-diameter sliding portion 49 and the bush 38.

The cutting edge 18 has a triangular tip, and a double-edged shape is desirable. The cutting blade 18 is fixed to the cutting blade mounting portion 50 by the bolts 52, etc., and always moves together with the sewing member 23.

The cutting blade 18 and the sewing member 23 are slightly fed in the direction of arrow E from the solid line to the two-dot chain line in FIG. 4 to the movable table 20 which is fixedly locked by the locking means 22. The fine cutting means 53 for forming a fine and highly precise cut depth of 50 to 90% -preferably 60 to 80% of the wall thickness of the running metal tube 2 is a mounting member. 23 and rotating shaft 40
It is composed of a stopper bolt 44, a handle 46, a fixed pointer 47 and the like.

Rail 25, axis of moving table 20, axis of rotation with respect to slope 24
Since the axes of 40 and the mounting member 23 are all parallel, the cutting edge 18
The front end of is directed to a direction inclined by the angle β toward the wake side (downward in FIG. 3) from a plane orthogonal to the filament body 3. It is desirable that this angle β be approximately 5 ° to 30 °,
By the approaching and pressing of the cutting edge 18 from such an angle, the metal tube 2 of the linear body 3 can be smoothly formed by the plastic deformation without escaping in the inner diameter direction, and the cutting acting on the cutting edge 18 can be achieved. The resistance is also reduced and the load on the cutting edge 18 can be reduced.

Next, referring to FIG. 1 and FIG. 2, the four cuts 54a, 54b ... Formed in the above-mentioned main body 5 are divided into two by alternately using the separation cuts 54a as the folding cuts 54b. . That is, the metal pipe tearing mechanism 6 pulls the substantially semi-circular cross-section portions 55, 55 in the opposite directions F, F of 180 ° to divide into two.

In addition, the metal pipe tearing mechanism 6 expands and deforms the pair of substantially semicircular portions 55, 55 separated from the linear built-in object 1 around the unseparated cuts 54b, 54b, respectively. It has flat plastic working mechanisms 57 and 57 which are composed of a driving roller 58 and a pressing roller 59 which are pulled so as to have a waveform 60, 60. Reference numerals 56 and 56 are guide rollers, and the substantially semicircular portions 55 and 55 that are divided into two are the unseparated cut lines before passing through the guide rollers 56 and 56 and reaching the vicinity of the flat plastic working mechanisms 57 and 57. 54b, 54b are expanded and deformed to form flattened double peaks 60, 60. Therefore, the semi-circular part 5
The 5,55 does not locally bend (buckle) and can effectively prevent cutting accidents. That is, since the thickness T of the flat double-peaked corrugation 60 is small, it is easy to bend, and local bending (buckling) does not occur. Therefore, about 100m to several tens
The metal tube 2 can be continuously peeled (without interruption) from the long linear body 3 of 00 m. Once interrupted, not only is it inefficient, but the cable core, which is the linear built-in object 1, is easily damaged due to cutting and cannot be reused. It is said that such a problem is solved satisfactorily by separating only two of the above-mentioned four cut lines 54a, 54b ... Which are 180 ° opposite to each other for separation and the rest for bending. I can say.

The present invention is not limited to the above-described illustrated embodiment, and the design can be freely changed. For example, the linear guide means 21 may be configured with a dovetail groove and a block-shaped carriage that slides along the dovetail groove, or It is also desirable that the fixed guide rods are composed of an appropriate number and a carriage having a sliding hole portion through which the fixed guide rods are inserted.

Further, the locking means 22 is free to have a grasping structure for fixing the movable table 20 at an arbitrary front retracted position or various structures.Furthermore, the cutting edge fine moving means 53 has a fine screw connection as shown in the figure. It is effective to use, but the mounting member 23 is provided with a screw hole,
Various design changes such as providing a male screw portion on the rotating shaft 40 can be freely made. Further, the cutting blade 18 may be a rotary blade. It should be noted that if the dies 11, 11 are replaceably attached as shown in FIG. 3, it is convenient because it is possible to easily deal with the linear body 3 having a large or small diameter.

〔The invention's effect〕

Since the present invention is configured as described above, it has the significant effects described below.

The linear inclusion 1 of the filament 3 can be taken out with high efficiency without damaging it. In particular, it is most suitable when the filament 3 is extremely thin (when the peripheral wall of the metal tube 2 is thin).

The cutting depth of the cutting blades 18 with respect to the metal tube 2 can be adjusted quickly and highly accurately.

When the substantially semicircular portions 55, 55 (formed by dividing the metal tube 2 into two) are separately formed, it is possible to effectively prevent the approximately semicircular portions 55, 55 from being cut in the middle.

The substantially semi-circular portions 55, 55 can be wound in a compact shape with flattened double peaks 60, 60. For this reason, the frequency of replacement of the wound rolls is reduced, and waste materials can be compactly collected and discarded.

[Brief description of drawings]

FIG. 1 is an overall simplified explanatory view of an embodiment of the present invention, FIG. 2 is an enlarged sectional action explanatory view, FIG. 3 is an enlarged sectional plan view of an essential part, FIG. 4 is an explanatory action diagram, and FIG. It is a rear view corresponding to FIG. 1 ... Linear built-in object, 2 ... Metal tube, 6 ... Metal tube tearing mechanism, 10 ... Hole, 11 ... Die, 18 ... Cutting edge, 19 ...
… Depth of cut adjustment mechanism, 20 …… Movable table, 21 …… Linear guide means, 22 …… Locking means, 53 …… Cutting edge fine moving means,
54a, 54b ... Cutting.

Continuation of front page (56) References JP-A-50-12581 (JP, A) JP-A-50-114582 (JP, A) JP-A-50-129898 (JP, A) JP-A-51-56983 (JP , A) JP-A-3-212108 (JP, A) JP-B-51-716 (JP, B1)

Claims (1)

[Claims] 1. A linear built-in body (1) having a hole (10) for guiding a linear body (3) coated with a metal tube (2) in a running state and having the same axis with a small interval (A). Two dies (11) (11) arranged on the core and four longitudinal cuts (54) on the outer surface of the metal tube (2).
a) (54a) (54b) (54b) 4 cutting edges (18)
... and the small gap (A) between the two dies (11) (11), the cut is made from the 4 radial direction with the central angle of the cross section of about 90 ° to the outer surface of the metal pipe (2). The cutting depth adjusting mechanism (19) that forms the cuts (54a) (54a) (54b) (54b) by bringing the blades (18) close to each other, and the metal pipe (2) are approximately 180 °. A pair of notches (5
4a) (54a) is divided into two, and the unseparated cut (54
b) A pair of substantially semicircular parts (55) (5
5) is separately formed, and a metal pipe tearing mechanism (6) for separating the metal pipe (2) from the linear inclusion (1) is provided, and the cutting depth adjusting mechanism (19) is In the state where the linear guide means (21) for roughly feeding the moving table (20) equipped with the cutting edge (18) and the cutting edge (18) are in contact with the outer surface of the metal tube (2). The locking means (22) for fixing the moving table (20) and the mounting member (23) to which the cutting edge (18) is directly fixed are finely fed to the moving table (20) in the fixed and locked state. With the finely moving cutting blade (53) for giving each of the four cutting blades (18) independently of each other, and the metal pipe tearing mechanism (6) has the linear built-in structure. A pair of substantially semicircular parts (55) (55) separated from the object (1)
From the driving roller (58) and the pressing roller (59), which are expanded and deformed around the unseparated cuts (54b) (54b) to form flattened double wavy (60) (60), respectively. A separation device for a metal pipe, comprising: a flat plastic working mechanism (57) (57).