JPH03212107A - Separator of metal tube - Google Patents

Abstract

PURPOSE:To separate and remove a metal tube without damaging an inside cable core by treating a part or the whole of a plurality of longitudinal slits formed in the metal tube of a traveling cable body by means of a cutting edge. CONSTITUTION:By means of four slits 54a, 54b... formed in the main body part 5 thereof, a metal tube-treating mechanism 6 bisects a metal tube by pulling almost semicircular section parts 55, 55 in 180 deg. opposite directions F, F. Until the half-split semicircular section parts 55 reach the vicinity of a pull roller 57, the section parts change the shape into flat two-angle waveforms 60 by spreading round a bending slit 54b so that an accident, that the section part is bent and cut partially, can be prevented effectively. That is, the thickness dimension T of the flat two-angle waveform 60 is small so that the section part is flexible and causes no partial bending. Therefore, metal tubes 2 can be peeled continuously (without stop) from a long cable body 3 of about one hundred to several thousand meters.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a metal tube separation device, and in particular to an ultrafine metal tube with an outer sheath that covers the core of electric wires, cables, etc. whose characteristics deteriorate due to moisture absorption. This invention relates to a metal pipe separation device for stripping metal pipes.

Problems to be solved by conventional techniques and inventions] In general,
If an aluminum tube is manufactured by rolling a metal tape, for example, an aluminum tape into a circular tube shape and welding the abutting portions, the wall can be made thinner and long lengths with small diameters can be manufactured at low cost. It is particularly useful as an outer skin for moisture-proofing and mechanically protecting cores of small-diameter electric wires, cables, etc. (hereinafter referred to as cable cores) whose internal properties are subject to deterioration due to moisture absorption, etc.

By the way, in the above-mentioned aluminum tube, pinholes may occur in the welded portion due to slight changes in external factors such as minute fluctuations in the welding current or minute vibrations of the abutted portion.

If there is a pinhole that penetrates the wall thickness of the tube, moisture will inevitably enter the aluminum tube, making it impossible to maintain the desired characteristics of the cable core built into the tube.

In particular, there are hundreds of strands with built-in cable cores.
Conventionally, such long filament bodies had to be discarded in their entirety if defects such as pinholes were found in a pressure test after welding.

Therefore, the purpose of the present invention is to separate and remove (strip) such ultra-thin metal tubes that do not have watertightness without damaging the internal cable core, and take out the cable core for reuse. The point is to make it possible.

[Means to solve the problem]

A metal tube separation device according to the present invention includes: a die having a hole for guiding a filament whose built-in object such as a cable core is coated with a metal tube in a running state; an open end of the hole of the die; a cutting depth adjustment mechanism that holds a cutting blade so as to be accessible to the outer surface of the metal tube in the vicinity; a metal tube tearing mechanism that tears part or all of the cut in the book and separates it from the built-in material; and the cutting depth adjustment mechanism roughly feeds the movable table equipped with the cutting blade a linear guide means for fixing the moving table with the cutting blade in contact with the outer surface of the metal tube; and a locking means for fixing the moving table with the cutting blade in contact with the outer surface of the metal tube, and a locking means for fixing the mounting member to which the cutting blade is directly fixed in a fixed and locked state. The movable table is configured to include a cutting blade fine movement means for giving minute feed to the moving table.

[For production]

The metal tube runs through the hole of the die while being guided by induction, preventing runout, and when the cutting blade is pressed close to the opening end of the hole, the variation in the depth of cut due to the cutting blade is reduced. Hard to occur.

The depth of cut adjustment mechanism and the cutting blade continuously form longitudinal cuts in the ultra-fine metal tube, and the metal tube tearing mechanism tears some or all of these cuts, damaging internal components. It can be taken out continuously.

Furthermore, the depth of cut adjustment mechanism can efficiently bring the cutting blade into contact with the outer surface of the metal tube by roughly feeding the cutting blade using the linear guide means, and then lock the moving table using the locking means. In addition, by using the cutting blade fine adjustment means, it is possible to finely adjust the depth of cut for the wall thickness of an extremely thin metal tube.

〔Example〕

Hereinafter, the present invention will be explained in detail based on drawings showing examples.

Figure 1 is an overall simplified diagram showing a separation device for ultra-fine metal tubes.As shown in Figure 2, this separation device is designed to handle the cores of electric wires, cables, etc. whose characteristics deteriorate due to moisture absorption, as shown in Figure 2. This device is capable of tearing and separating a metal tube 2 from a filament body 3 in which an ultra-fine metal tube 2 made of aluminum or the like (with an outer diameter of 4 ttm to 1 waC) is coated on a built-in body 1, and is shown in FIG. In this case, this metal tube separation device is
A filament extractor II4 in which the filament 3 is wound and fed out, a main body portion 5 having a die and a cutting depth adjustment mechanism to be described later, and a metal tube tearing mechanism 6 provided downstream thereof. Surrounded by two-dot chain lines in the figure, a waste material winding mechanism 8 that winds up the separated metal pipe waste material 7, and a built-in material winding mechanism 9 that winds up the built-in material 1 for reuse are shown as
We are prepared.

The filament feeding mechanism 4 has a bobbin around which the filament 3 is wound, and applies a certain back tension run to the filament 3.

The built-in object winding mechanism 9 has a bobbin for winding up the built-in object 1 and a drive device (not shown) so that unnecessary tensile force is not applied to the built-in object 1, which is weak in tensile force such as a small diameter cable core. are doing.

Therefore, to explain the main body part 5, FIGS.
As shown in the figure, two dies 11.1.1 having holes 10 for guiding the filament 3 in a straight running state are placed at a small distance A.
and are arranged on the same axis. 2 dice 11.1
1 has the same shape, the distal outer peripheral surface 12 is formed in a tapered shape, the proximal end has an outer flange 13, and the hole 1
0 has a swinging portion 10a whose diameter gradually increases toward the base end.

Reference numeral 14 denotes a holding base, which has a rod-like shape and includes a disk portion 14a and a cylindrical holding tube portion 14b protruding from the center thereof, and one die 11 is inserted from the base end side of the holding tube portion 14b. stepped portion 15 that is positioned by inserting the outer flange portion 13 into position.
A die insertion hole 15 having a diameter of 15 mm is provided, and a cap 16 with a hole is screwed onto the tip of the holding cylinder portion 14b to fix the other die 11 therein.

Four rectangular through holes 17 are provided in the middle of the holding cylinder portion 14b, and the positions of the through holes 17 are located at the tips of both dies 11 and 11 facing each other with the small distance A. Approximately corresponds to the center between.

A cutting blade 18 is inserted into and out of the through-hole 17 . The cutting blade 18 is held via a cutting depth adjustment mechanism 19 .

The cutting depth adjustment mechanism 19 includes a movable table 20 on which the cutting blade 18 is mounted, and a linear guide means 2 for roughly feeding the same.
1, a locking means 22 for fixing the movable table 20 in a state where the cutting blade 18 is in contact with the outer surface of the metal tube 2 (of the filamentary body 3) as shown by the solid line in FIG. 4, and the cutting blade 18 A cutting blade fine movement means 53 is provided which gives a slight feed to the mounting member 23 directly fixed to the movable table 20 in the fixed and locked state to advance it to the state shown by the two-dot chain line in FIG.

More specifically, the disc portion 14a has four sloped surfaces 2 such that the angle β in FIG. 3 is about 5° to 30°.
4... are formed, and a linear way rail 25 and an angle bracket 26 are fixed to each of the sloped surfaces 24.... A carriage 27 is attached to the rail 25 so as to be reciprocally movable, and the linear guide means 21 is constituted by the rail 25, the carriage 27, etc., and reciprocates as shown by arrows B and C to move around the moving platform. Roughly feed 20. In other words, the moving table 20 is this carriage 27
It is fixed to with bolts 28, etc.

The moving table 20 has a substantially rectangular parallelepiped shape with a circular hole 29 extending therethrough, and has a screw hole 30 on the side surface (see FIG. 5).

The bracket 26 is provided with an elongated hole 31, and is further provided with a lock bolt 35 that integrally includes a handle portion 32, a large diameter portion 33, and a bolt portion 34, and the bolt portion 34 of the lock bolt 35 is inserted through the elongated hole 31. At the same time, the movable base 20 is screwed into the screw hole 30 of the movable base 20 so as to be freely forward and retractable, and the movable base 20 is roughly fed in the direction of arrow B, so that the cutting blade 18 is inserted as shown by the solid line in FIG.
When the lock bolt 35 is screwed in after the tip of the large diameter portion 33 is in contact with the outer surface of the metal tube 2, the end surface of the large diameter portion 33 is compressed against the bracket 26 near the elongated hole 31, and due to frictional force, The moving table 20 is fixed.

In order to further ensure this fixation, a locking nut member 36 is screwed onto the bolt portion 34, and the large diameter portion 3
3 and this nut member 36, the bracket 26 is held and fixed in a pinched manner.

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

Thus, the bushing 38 with the inner flange 37 is inserted into and fixed to the circular hole 29 of the moving table 20, and a rotating shaft 40 having threaded holes 39 with an extremely small pitch is fitted inside the bushing 38. Moreover, the rotary shaft 40 includes a large-diameter portion 41 having the screw hole 39 and a small-diameter handle attachment shaft portion 42 protruding from the large-diameter portion 41, the stepped portion of which is close to the inner flange 37 of the bushing 38. Also, 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 axis is inserted into the outer circumferential groove 43 . Further, a handle 46 having scales 45 on the outer periphery is fixed to the handle mounting shaft 42 of the rotating shaft 40 by key coupling or the like, and a fixed pointer 47 is attached to the handle 46 in correspondence with the scales 45. Mobile platform 2
Fixed at 0.

The mounting member 23 includes a male threaded portion 48 that is screwed into the screw hole 39 of the rotating shaft 40 so as to be freely reciprocated, and a large-diameter sliding portion 49 that is reciprocatably fitted into the inner surface of the hole of the bushing 38. , and a cutting blade attachment portion 50, and a rotation-stopping sliding key 51 is provided between the large-diameter sliding portion 49 and the bushing 38.

The cutting blade 18 has a triangular tip and is preferably double-edged.
0 and always moves together with the mounting member 23.

The cutting blade 18 and the mounting member 23 are attached to the fourth
In the figure, a minute feed is given from the solid line in the direction of arrow E as shown by the two-dot chain line, and the running metal tube 2 is fed by 50 to 90% of its wall thickness.
Preferably, the cutting blade fine movement means 53 for forming a cut with a delicate and highly accurate cutting depth of 60 to 80% is composed of the mounting member 23, the rotating shaft 40, the stomper port 44, the handle 46, the fixed pointer 47, etc. be done.

With respect to the slope surface 24, the axis of the rail 25 and the moving platform 20,
Since the axes of the rotating shaft 40 and the mounting member 23 are all parallel, the tip of the cutting edge is positioned downstream by the angle β from the plane orthogonal to the filament 3 (see FIG. 3). facing downward). This angle β is preferably about 5° to 30°, and by approaching and pressing the cutting blade 18 from such an angle, the metal tube 2 of the filament 3 is mostly plastically deformed. The cut can be formed smoothly without escaping in the inner diameter direction, the cutting resistance acting on the cutting edge 18 is also reduced, and the cutting edge 1
It can reduce the burden of 8.

Next, in FIGS. 1 and 2, the four cuts 54a, 54b, . be done. That is, the metal tube tearing mechanism 6 pulls the substantially semicircular cross section 55.55 in 180° opposite directions F and F to divide it into two.

56, 56 are guide rollers, 57.57 are drive rollers 5
8 and a pressure roller 59. By the time it reaches the vicinity of this tension roller 57, the semicircular cross section 55 divided into two has a flat double-crested waveform 60 with the bending cut 54b as the center. Because it expands and deforms, accidents such as local bending (buckling) and cutting can be effectively prevented. That is,
Since the thickness dimension T of the flat double peak waveform 60 is small, it is easy to bend and does not cause local bending (buckling). 2 can be stripped continuously (without interruption), but once interrupted, it is not only inefficient, but also the cable core, which is the built-in part 1, is easily damaged by cutting (and becomes unusable). .This kind of problem can be solved by using the four cuts 5 mentioned above.
By separating only the two opposite 180 of 4a, 54b, etc. for separation, and using the rest for bending, it can be said that the solution is resolved in a brotherly manner.

It should be noted that the present invention is not limited to the illustrated embodiment described above, and is of course free to change the design, and it is also possible to use a single die 11, or to increase the number of cuts 54a, 54b, etc. In addition, all the cuts 54a... can be torn off for separation. Furthermore, the linear guide means 21 may include a dovetail groove and a block-shaped carriage that slides along the dovetail groove, or may include a carriage having an appropriate number of fixed guide rods and a sliding hole through which the rods are inserted. Configuring is also desirable.

Further, the locking means 22 may have a gripping structure for fixing the movable table 20 at any forward or backward position or any other various structures. Furthermore, although it is effective to use a fine screw connection for the cutting blade fine movement means 53, such as rotation, various designs such as providing a threaded hole in the mounting member 23 and providing a male threaded part in the rotating shaft 40 are possible. Changes can be made freely.

Further, the cutting blade 18 may be a rotating blade. In addition, if the dies 11, 11 are attached replaceably as shown in FIG. 3, it is convenient because it can easily be adapted to the diameter of the filament 3.

〔Effect of the invention〕

Since the present invention has the above-described configuration, it has the following significant effects.

■ Built-in items 1 such as cable cores can be taken out and reused with high efficiency without being damaged, contributing to resource saving.

■ The depth of cut can be controlled with high precision, so there is no need to cut too deep and damage the built-in components.
It will no longer be difficult to separate.

■ Rough setting can be done quickly by the linear guide means 21 that allows rough feeding. Thereafter, fine adjustment of the depth of cut can be made with high precision by the cutting blade fine movement means 53 after the movable table 20 is fixed by the locking means 22.

[Brief explanation of drawings]

Fig. 1 is an overall simplified explanatory diagram of an embodiment of the present invention, Fig. 2 is an enlarged cross-sectional view for explaining the operation, Fig. 3 is an enlarged cross-sectional plan view of the main part, Fig. 4 is an explanatory view for the operation, and Fig. 5 is an explanatory view of the operation. FIG. 3 is a rear view corresponding to FIG. 3; l... Built-in contents, 2... Metal tube, 6... Metal tube tearing mechanism, lO... Hole, 11... Dice, 18...
... Cutting blade, 19... Cutting depth adjustment mechanism, 20... Moving table, 21... Linear guide means, 22... Locking means, 53... Cutting blade fine movement means, 54a, 54b・・・
・Cut. Patent applicant Mitsubishi Cable Industries, Ltd. Figure 4

Claims (1)

[Scope of Claims] 1. A die having a hole for guiding a filament whose built-in material such as a cable core is coated with a metal tube in a running state; and a die near the open end of the hole of the die. a cutting depth adjustment mechanism that holds a cutting blade so as to be accessible to the outer surface of the metal tube; and a plurality of longitudinal cuts formed by the cutting blade in the metal tube of the linear body while it is traveling. a metal tube tearing mechanism for tearing part or all of the inside of the metal pipe to separate it from the built-in material; a linear guide means, a locking means for fixing the moving table with the cutting blade in contact with the outer surface of the metal tube, and a locking means for fixing the mounting member to which the cutting blade is directly fixed, and the moving table in a locked state. A separating device for metal tubes, comprising: a cutting blade fine movement means for giving a minute feed to a metal tube.