CN109219910B

CN109219910B - Multiple sleeve for cable protection device and cable protection device comprising same

Info

Publication number: CN109219910B
Application number: CN201780031917.XA
Authority: CN
Inventors: 李商溢; 金昌石; 裵相俊; 张光东
Original assignee: LS Cable Ltd
Current assignee: LS Cable and Systems Ltd
Priority date: 2016-05-26
Filing date: 2017-04-21
Publication date: 2020-05-19
Anticipated expiration: 2037-04-21
Also published as: KR101890986B1; JP2019519183A; CN109219910A; KR20170134155A; JP6640380B2

Abstract

The present invention relates to a multiple tube for a cable protection device and a cable protection device including the same. In particular, the present invention relates to a multi-layer sleeve of a cable protection device, which not only protects cables used in a moving body of a repeatedly moving work machine, an electronic apparatus, an industrial robot, a transportation machine, etc., and further stably supports to suppress breakage of the cables, but also has excellent durability so as not to be broken even by repeated bending movement, and thus has high reliability, and as a result, suppresses process errors and cable breakage due to dust, and thus is suitable for a manufacturing process of high precision and high purity products such as semiconductor wafers, and a cable protection device including the same.

Description

Multiple sleeve for cable protection device and cable protection device comprising same

Technical Field

The present invention relates to a multiple tube for a cable protection device and a cable protection device including the same. More particularly, the present invention relates to a multi-layer sleeve for a cable protection device, which not only protects cables used in a moving body of a repeatedly moving work machine, an electronic apparatus, an industrial robot, a transportation machine, etc., and further stably supports the cables to suppress damage of the cables, but also has excellent durability so as not to be damaged even by repeated bending movement, and thus has high reliability, and as a result, suppresses process errors and cable damage due to dust, and is thus suitable for a manufacturing process of high-precision and high-purity products such as semiconductor wafers, and a cable protection device including the same.

Background

In flexible cables or hoses (hereinafter, referred to as "cables") such as electric cables, optical fiber cables, and fluid supply hoses used in moving bodies such as working machines, electronic devices, industrial robots, and transportation machines, since the cables are damaged by warping, friction between the cables, or tensile force or bending force applied to the cables due to movement of the moving body, a cable protection device is used that protects and stably supports the cables to prevent damage to the cables used in the moving body.

The existing cable-type protection device includes a flexible multi-tube including one or more grooves (pod) into which electric wires and cables, fluid supply hoses, and the like corresponding to the type of cables are respectively inserted, and the multi-tube may be generally made of a polymer material to achieve flexibility, and upper and lower flexible members constituting the multi-tube may be partially joined to form the one or more grooves (pod).

However, when the flexible multi-layer bushing included in the conventional cable protection device is applied to a mobile body such as a working machine, an electronic device, an industrial robot, a transportation machine, etc., a joint portion of an upper flexible member and a lower flexible member constituting the flexible multi-layer bushing may be partially broken due to repeated bending movements, a gap may be formed between the upper flexible member and the lower flexible member of the broken joint portion, and dust or the like inside the groove (pod) may flow out through the gap to the outside, thereby causing a process error in a manufacturing process of a high-precision and high-purity product or adjacent cables may be broken due to mutual friction.

Therefore, there is a strong demand for a multi-layer sleeve for a cable protection device, which not only protects cables used in a moving body of a repeatedly moving work machine, an electronic apparatus, an industrial robot, a transportation machine, etc., and further stably supports the cables to suppress damage of the cables, but also has excellent durability so as not to be damaged even by repeated bending movement, and thus has high reliability, and as a result, suppresses process errors and damage of the cables due to dust, and thus is suitable for a manufacturing process of high-precision and high-purity products such as semiconductor wafers, and a cable protection device including the same.

Disclosure of Invention

Problems to be solved by the invention

An object of the present invention is to provide a multi-layer sleeve for a cable protection device for protecting cables used in a mobile body such as a working machine, an electronic device, an industrial robot, or a transportation device and stably supporting the cables to suppress damage to the cables, and a cable protection device including the same.

Another object of the present invention is to provide a multi-tube for a cable protection device and a cable protection device including the same, which have excellent durability so as not to be broken even by repeated bending movements and thus have high reliability, and as a result, suppress process errors and cable breakage due to dust, and thus are suitable for a manufacturing process of high-precision and high-purity products such as semiconductor wafers.

Technical scheme for solving problems

In order to solve the above problems, the present invention provides a multiple bushing in which,

the multi-layer sleeve for the cable protection device comprises more than one groove (pod) which can be inserted and accommodated by a cable, a fluid supply hose or a guide chain,

the multiple cannula is formed by partially joining an upper flexible member and a lower flexible member,

the slot is formed by an unbonded portion between the bonded portions of the upper and lower flexible members,

the upper flexible member includes: a stretchable layer made of flexible resin; abrasion resistant layers respectively arranged on the upper surface and the lower surface of the telescopic layer and made of resin with low friction coefficient; a bonding layer formed of an adhesive composition between the stretch layer and the wear layer for bonding the stretch layer and the wear layer to each other,

among the wear-resistant layers, the wear-resistant layer disposed on the lower surface of the telescopic layer and forming the inner surface of the groove includes a plurality of wear-resistant layer columns spaced apart at intervals of the same or different lengths, and among the plurality of wear-resistant layer columns, the left outermost wear-resistant layer column and the right outermost wear-resistant layer column are configured such that: the outer end of the outermost wear-resistant layer column on the left side and the outer end of the outermost wear-resistant layer column on the right side are spaced from the outer profiles of the left and right ends of the multiple sleeve at intervals of the same or different lengths, respectively,

the lower flexible member has a laminated structure symmetrical to the upper flexible member,

the adhesive composition flowing out through the spaces formed between the wear-resistant layer pillars and the ends of the upper flexible member and the spaces formed between the wear-resistant layer pillars and the ends of the lower flexible member are joined to each other to form the joint.

Wherein the wear-resistant layer forming the inner surface of the groove satisfies the following formula 1,

[ formula 1]

y＝ax+0.15[bd+1]±0.15

In the case of the above-mentioned formula 1,

d is the diameter (mm) of a circle having the same cross-sectional area as the maximum cross-sectional area of the cable species inserted in any slot,

x is the width (mm) of the wear layer column forming the groove,

y is the spacing between the wear layer post and another adjacent wear layer post or the spacing (mm) of the outermost wear layer post ends,

a is 0.08 to 0.12,

b is 0.09 to 0.10.

Further, a diameter (d) of a circle having the same cross-sectional area as the maximum cross-sectional area of the cable or the like inserted in the groove is 3.8mm to 10.0mm, a width (x) of the wear-resistant layer column forming the groove is 15mm to 23mm, and an interval between the wear-resistant layer column and another adjacent wear-resistant layer column or an interval (y) of an end of the outermost wear-resistant layer column is 1.5mm to 2.5 mm.

In addition, the thickness of the telescopic layer is 0.2mm to 0.4mm, the thickness of the wear-resistant layer is 0.05mm to 0.15mm, and the thickness of the bonding layer is 0.025mm to 0.075 mm.

And, the elastic layer includes polyurethane resin.

Further, the wear layer includes an expanded polytetrafluoroethylene (ePTFE) resin.

Further, the adhesive composition includes a hot melt.

And at least one of the abrasion resistant layers includes a porous resin formed with a plurality of micropores, at least a portion of which includes antistatic particles.

Wherein the antistatic particles comprise one or more positively or negatively charged particles selected from the group consisting of conductive nanocarbons, conductive nanometals, conductive polymers, and ionomers.

At least one of the wear-resistant layers includes a polymer resin formed into a fine mesh structure by chain or network bonding of small units, and antistatic particles are bonded to the fine mesh structure.

Further, in the joint portion, both the adhesive layer and the stretch layer are melted and joined.

In addition, a cable-like protection device is provided, wherein,

the method comprises the following steps:

the multiple sleeve;

a guide chain inserted into and received in one or more grooves of the multiple sleeve; and

and clamps disposed at both ends of the multiple sleeve, fixing and sealing both ends of the groove.

Effects of the invention

The multiple tube for a cable protection device according to the present invention is made of a flexible material, and is excellent in preventing damage to cables by stably inserting the cables into one or more grooves (pod) having a specific design shape to protect and further stably support the cables.

The multiple tube for cable protection device of the present invention has excellent durability due to one or more grooves (pod) having a specific design shape, and is not broken even by repeated bending movements, and thus has high reliability, and as a result, has an excellent effect of suppressing process errors and cable breakage due to dust.

Drawings

Fig. 1 schematically shows an embodiment of the cable-like protection device according to the invention.

Fig. 2 schematically shows an example of a state where a cable-like and a guide chain are inserted into a multi-tube in the cable-like protection device shown in fig. 1.

3 fig. 3 3 3 schematically 3 shows 3 the 3 structure 3 of 3 a 3 cross 3 section 3 taken 3 along 3 line 3 a 3- 3 a 3' 3 of 3 fig. 3 1 3. 3

Fig. 4 schematically shows the cross-sectional structure of the jig when the multiple tube of the present invention is multilayered.

Fig. 5 schematically shows a cross-sectional structure and a manufacturing method of one embodiment of a multiple bushing for a cable-like protection device of the present invention.

Fig. 6 is an enlarged view of a portion of fig. 5 sectioned by a double-dashed line.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail. However, the present invention is not limited to the scope of the embodiments described herein, and may be embodied in other forms. Rather, the embodiments described herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Like reference numerals denote like constituent elements throughout the specification.

3 fig. 3 1 3 schematically 3 shows 3 an 3 embodiment 3 of 3 a 3 cable 3 or 3 the 3 like 3 protection 3 device 3 of 3 the 3 present 3 invention 3, 3 fig. 3 2 3 schematically 3 shows 3 an 3 embodiment 3 of 3 a 3 state 3 where 3 a 3 cable 3 or 3 the 3 like 3 and 3 a 3 guide 3 chain 3 are 3 inserted 3 into 3 a 3 multi 3- 3 layer 3 sheath 3 in 3 the 3 cable 3 or 3 the 3 like 3 protection 3 device 3 shown 3 in 3 fig. 3 1 3, 3 fig. 3 3 3 schematically 3 shows 3 a 3 structure 3 of 3 a 3 section 3 taken 3 along 3 line 3 a 3- 3 a 3' 3 of 3 fig. 3 1 3, 3 and 3 fig. 3 4 3 schematically 3 shows 3 a 3 cross 3- 3 sectional 3 structure 3 of 3 a 3 jig 3 when 3 the 3 multi 3- 3 layer 3 sheath 3 according 3 to 3 the 3 present 3 invention 3 is 3 multi 3- 3 layered 3. 3

As shown in fig. 1 and 2, the cable-like protection device according to the present invention may include: a flexible multiple sleeve 500 including one or more grooves (pod)530, the one or more grooves (pod)530 receiving one or more cables 200, guide chains 100, fluid supply hoses (not shown), and the like inserted therein; a guide chain 100 inserted and received in one or more grooves 530 of the flexible multi-layer sleeve 500, preferably, in one or more grooves 530 disposed at the outermost layer; and a clamp 600 disposed at both ends of the flexible multi-well 500, fixing and sealing (sealing) both ends of the groove 530.

The guide chain 100, which is inserted into one or more grooves 530 of the flexible multi-layer bushing, preferably, the outermost groove 530, thereby performing a function of preventing sagging due to its own weight at the linear portion of the flexible multi-layer bushing and maintaining a constant radius of curvature in the curved portion, may be made of a material such as metal, plastic, or the like.

Also, the jig 600 can suppress the discharge of dust generated due to friction between the inner surface of the groove 530 and the cables 200 inserted therein to the outside, thereby being suitable for use in the manufacturing process of high-precision and high-purity products such as semiconductor wafers.

In addition, as shown in fig. 3, the clamp 600 may further include: an end cap 610 for connecting the guide chain 100 with the jig and sealing an end of the groove into which the guide chain 100 is inserted; and a slip-preventing pad 620 for preventing slipping of the multiple sleeve 500 to prevent the multiple sleeve 500 from falling out of the inside of the jig. Here, the non-slip pad 620 may be made of a soft rubber material to protect the cable or the like, and the bottom surface may be treated with knurling (knurling) to prevent sliding.

Further, as shown in fig. 4, the multiple sleeve according to the present invention may be used in a structure in which two or more multiple sleeves having the same or different number of grooves 530 are stacked in multiple layers, in which case the jig 600 applied to the end of the multiple sleeve of multiple layers may also be formed in multiple layers. The jig 600 applied to the multi-layered multi-sleeve may further include: an inner block 630 for filling an empty space of a side of the multi-tube having a relatively small number of slots 530; and a spacer 640 interposed between the lower jig and the upper jig to secure a space for inserting the multi-cannulae.

Fig. 5 schematically shows a cross-sectional structure and a manufacturing method of an embodiment of a multi-layer sleeve for a cable protection device according to the present invention, and fig. 6 partially shows an enlarged portion of fig. 5 divided by a double-dashed line.

As shown in fig. 5, the multiple cannula 500 according to the present invention may be formed by partially engaging the upper flexible member 510 and the lower flexible member 520, the groove 530 may be formed by an unbonded portion between the engaging portions of the upper flexible member 510 and the lower flexible member 520, here, the upper flexible member 510 is formed by bonding the abrasion resistant layers 512, 512' to the upper and lower surfaces of the telescopic layer 511 using the adhesive layer 513, the expansion layer 511 is made of flexible resin such as urethane and relieves stress applied when the multi-tube is repeatedly bent and moved, the wear-resistant layers 512 and 512' are made of a resin such as fluororesin having excellent wear resistance, lubricity and the like and a low friction coefficient, the adhesive layer 513 is formed of an adhesive composition such as a hot melt, and the lower flexible member 520 may be laminated in a symmetrical structure to the upper flexible member 510.

Further, among the abrasion

resistant layers

512, 512 ', 522' included in each of the

flexible members

510, 520, the abrasion resistant layer 512 ', 522' forming the inner surface of the groove (pod)530 may include a plurality of abrasion resistant layer columns spaced at intervals of the same or different lengths, and among the plurality of abrasion resistant layer columns 512 ', 522', the outer side end of the outermost abrasion resistant layer on the left side and the outer side end of the outermost abrasion resistant layer column on the right side are spaced at intervals of the same or different lengths from the outer profile of the left side end and the right side end of the multiple sleeve 500, respectively.

As shown in fig. 3 and 4, an adhesive composition of hot melt or the like is melted by a space formed between and at the end of the plurality of abrasion

resistant layers

512, 522' and is thermally fused or the like to be joined to each other, so that the upper flexible member 510 and the lower flexible member 520 are partially joined, and one or more grooves (pod)530 into which a cable or the like can be inserted can be formed by an unjoined portion between the plurality of joining portions.

Since the inner surfaces of the grooves 530 are formed of the abrasion resistant layers 512 ', 522' made of resin having excellent abrasion resistance, lubricity, etc. and a low friction coefficient, it is possible to prevent or minimize damage of cables, etc. inserted and received in the grooves 530 due to friction therebetween, and to protect the cables, etc. by easily inserting the cables into the grooves.

Specifically, when the upper and lower

flexible members

510 and 520, which are respectively laminated and formed, are locally joined by thermal fusion of an adhesive composition of a hot melt or the like of the

adhesive layers

513 and 523 included in the upper and lower

flexible members

510 and 520, the joined portion may thermally fuse the adhesive composition of the hot melt or the like at high temperature and high pressure, and preferably, the

stretchable layers

511 and 521 may also be melted and joined together with the

adhesive layers

513 and 523 formed of the adhesive composition in the joined portion, thereby further improving joining strength, and in the case where the

adhesive layers

513 and 523 and the

stretchable layers

511 and 521 are all made of the same polyurethane material, the joining force may be further improved.

The joined portion may be subjected to primary thermal fusion of the adhesive composition of the hot melt or the like through, for example, a pair of rollers heated to 120 to 190 ℃ and pressurized at 2 to 5MPa, and then to secondary thermal fusion of the adhesive composition of the hot melt or the like through a pair of rollers heated to 70 to 110 ℃ and pressurized at 2 to 5 MPa. Here, the secondary thermal fusion may be additionally performed in order to improve the bonding strength of the portions bonded by the primary thermal fusion and remove surface wrinkles generated at the time of the primary thermal fusion.

In particular, the abrasion resistant layers 512 ', 522' may satisfy the condition of the following formula 1.

[ formula 1]

y＝ax+0.15[bd+1]±0.15

In said formula 1

D is the diameter (mm) of a circle having the same cross section as the maximum cross section area of the cable type inserted into any slot (pod)530,

x is the width (mm) of the wear layer 512 ', 522' pillars forming the groove (pod),

a is 0.08 to 0.12,

b is 0.09 to 0.10.

For reference, [ bd +1] in said formula 1 is a gaussian function, which refers to an integer of prime numbers where bd +1 is discarded.

The present inventors found through experiments that in the case where the abrasion resistant layers 512 ', 522' are out of the condition of the formula 1, that is, in the case where the width x of one abrasion resistant layer 512 ', 522' column of the groove (pod) and/or the interval between the abrasion resistant layer column and another adjacent abrasion resistant layer column or the interval y of the outermost abrasion resistant layer column end, which are formed according to the cross-sectional area of the cable type inserted into any groove 530, are not up to the standard, since the durability of the multi-layered sleeve for a cable type protective apparatus according to the present invention is greatly reduced, especially the durability of the joint of the upper flexible member and the lower flexible member is greatly reduced, the joint may be partially broken upon repeated bending movements, and a gap may be formed between the upper flexible member and the lower flexible member in the broken joint, thereby completing the present invention, and through the gap, dust and the like inside the grooves 530 flow out to the outside, which may cause process errors in the manufacturing process of high-precision and high-purity products or damage of adjacent cables inserted into the grooves 530 by friction with each other.

In addition, in the multiple sleeve for the cable protection device according to the present invention, since each of the plurality of grooves 530 may be inserted with a cable having a different cross-sectional area, different x and/or y may be maintained according to the cross-sectional area of the cable inserted into each groove 530, that is, the width x of the columns of the abrasion resistant layers 512 ', 522' forming the groove (pod) and/or the interval between the columns of the abrasion resistant layers and the adjacent another column of the abrasion resistant layers or the interval y of the end of the column of the outermost abrasion resistant layers may be maintained, on the premise that the condition of formula 1 is satisfied.

For example, the diameter d of a circle having the same cross-sectional area as the maximum cross-sectional area of the cable-like member inserted into any of the grooves (pod)530 may be 3.8 to 10.0mm, the width x of the columns of the abrasion resistant layers 512 ', 522' forming the grooves (pod) may be 15 to 23mm, the interval between the columns of the abrasion resistant layers and another adjacent column of the abrasion resistant layers or the interval y of the end of the outermost column of the abrasion resistant layers may be 1.5 to 2.5mm, in addition, the thickness of the expansion layers 511, 521 may be 0.2 to 0.4mm, the thickness of the abrasion

resistant layers

512, 512 ', 522' may be 0.05 to 0.15mm, and the thickness of the

adhesive layers

513, 523 may be 0.025 to 0.075 mm.

Since the abrasion

resistant layers

512, 512 ', 522' have excellent abrasion resistance and lubricity and have a low friction coefficient, when the abrasion resistant layers are disposed on the inner surfaces of the grooves 530, damage due to friction between cables and the like inserted and received in the grooves 530 can be avoided or suppressed, and generation of dust due to the friction can be prevented, and when the abrasion resistant layers are disposed on the outer surfaces of the grooves 530, damage due to friction between the flexible multi-layer sleeves 500 can be avoided or suppressed, and generation of dust due to the friction can be prevented.

The resin forming the wear

resistant layer

512, 512 ', 522' may be selected from, for example, Polytetrafluoroethylene (PTFE), fluoroethylene propylene copolymer (FEP), meltable Polytetrafluoroethylene (PFA), etc., preferably Polytetrafluoroethylene (PTFE), more preferably expanded polytetrafluoroethylene (ePTFE).

The expanded polytetrafluoroethylene (ePTFE) is a polymer material formed by chemical bonding of chain-like or net-like small unit bodies, is formed into a porous structure having micropores, and has excellent heat resistance, chemical resistance, and an extremely low friction coefficient. In particular, it has chemical resistance against all chemicals, has a smooth surface and can maintain physical properties over a wide temperature range.

However, since the expanded polytetrafluoroethylene (ePTFE) has a strong negative charge tendency and thus static electricity is easily generated, dust in the air adheres to the abrasion

resistant layers

512 and 522 or the generated static electricity is discharged into the air, thereby causing a process error or the like or causing a signal or control error of a cable inserted into the groove 530.

Thus, the wear

resistant layers

512, 512 ', 522', particularly the wear

resistant layers

512, 522 disposed on the outer surfaces of the grooves 530, may be antistatic treated. The antistatic treatment may be performed by dipping the material of the flexible multi-sleeve 500 in an antistatic agent or spraying an antistatic agent on the surface of the flexible multi-sleeve 500.

The antistatic agent may include: antistatic particles having a positive charge or a negative charge, such as conductive nanocarbons or metals or conductive polymers or ionomers, a solvent in which the antistatic particles are dispersed, a surfactant that facilitates dispersion of the particles, and the like.

Here, the conductive polymer or ionomer may be selected from polyacetylene, polypyrrole, polythiophene, polyphenylene, phenylene sulfide, polyaniline, and the like, and is preferably a conductive polymer or ionomer which may include fluorinated particles. Further, the solvent may be an acrylic solvent such as acrylic acid, or may be a solvent such as an alcohol solvent such as isopropyl alcohol.

After the antistatic agent permeates the micropores of the abrasion resistant layer, the solvent in the antistatic agent is volatilized, and the positively or negatively charged antistatic particles remain in the micropores of the expanded polytetrafluoroethylene (ePTFE) constituting the abrasion resistant layer, so that the chargeability of the expanded polytetrafluoroethylene (ePTFE) can be significantly reduced.

Further, the positively or negatively charged particles are not left on the surface of the wear-

resistant layers

512, 512 ', 522' but deposited on the fine mesh-like structure inside, and thus are not removed by friction of the wear-

resistant layers

512, 512 ', 522', and the antistatic function can be stably performed without lowering the physical properties of the wear-

resistant layers

512, 512 ', 522'.

Among the hot melts contained in the

adhesive layers

513, 523, there is no particular limitation as long as it can be joined by hot fusion under the aforementioned conditions, and for example, hot melts of polyurethanes, thermoplastic polyurethanes, polyether sulfones, polyamides, vinyl acetate esters may be applied.

[ examples ]

After manufacturing a multi-tube having the specifications shown in table 1 below, one end thereof was sealed with a jig, and air was simultaneously injected into all the grooves through the other end, thereby measuring the air pressure at a point where the joint portion of the upper flexible member and the lower flexible member was partially ruptured due to unsustainability. The measurement results are shown in table 1 below.

[ Table 1]

As shown in table 1, in the multiple tube for a cable or the like protection device according to the present invention, it was confirmed that since the joint portion of the upper flexible member and the lower flexible member thereof has excellent durability so that the joint portion is not broken even under a high internal pressure, and thus, the joint portion is not broken even during repeated bending movements of 1000 ten thousand or more times, it is possible to prevent process errors from being caused in the manufacturing process of high-precision and high-purity products due to the dust inside the grooves flowing out to the outside through the gap generated by the breakage of the joint portion, or to prevent the cables or the like inserted into the plurality of grooves respectively and adjacent to each other from being broken due to friction with each other.

While the present invention has been described with reference to the preferred embodiments, those skilled in the art will be able to make various modifications and changes without departing from the scope of the invention as set forth in the appended claims. Therefore, it should be understood that if the modified embodiments substantially contain the elements constituting the scope of the claims of the present invention, all of them should be included in the technical scope of the present invention.

Claims

1. A multi-layer sleeve, wherein,

a multi-pipe for a cable protection device, comprising one or more grooves (pod) into which a cable, a fluid supply hose or a guide chain can be inserted and housed, both ends of the multi-pipe being fixed and sealed by a jig,

the multiple cannula is formed by partially engaging an upper flexible member and a lower flexible member,

the adhesive composition flowing out through the spaces formed between the wear-resistant layer pillars and the ends of the upper flexible member and the spaces formed between the wear-resistant layer pillars and the ends of the lower flexible member are joined to each other to form the joint,

the wear-resistant layer forming the inner surface of the groove satisfies the following formula 1,

[ formula 1]

y＝ax+0.15[bd+1]±0.15

In the case of the above-mentioned formula 1,

x is the width (mm) of the wear layer column forming the groove,

a is 0.08 to 0.12,

b is 0.09 to 0.10.

2. The multiple cannula of claim 1,

the diameter (d) of a circle having the same cross-sectional area as the maximum cross-sectional area of the cable-like member inserted into the groove is 3.8mm to 10.0mm, the width (x) of the wear-resistant layer column forming the groove is 15mm to 23mm, and the interval between the wear-resistant layer column and another adjacent wear-resistant layer column or the interval (y) of the end of the outermost wear-resistant layer column is 1.5mm to 2.5 mm.

3. The multiple cannula of claim 2,

the thickness of flexible layer is 0.2mm to 0.4mm, the thickness of wearing layer is 0.05mm to 0.15mm, the thickness of bond-coat is 0.025mm to 0.075 mm.

4. The multiple cannula of claim 1,

the stretchable layer includes a polyurethane resin.

5. The multiple cannula of claim 1,

the wear-resistant layer comprises expanded polytetrafluoroethylene resin.

6. The multiple cannula of claim 1,

the adhesive composition includes a hot melt.

7. The multiple cannula of claim 1,

at least one of the abrasion resistant layers includes a porous resin formed with a plurality of micropores, at least a portion of which includes antistatic particles.

8. The multiple cannula of claim 7,

the antistatic particles include one or more positively or negatively charged particles selected from the group consisting of conductive nanocarbons, conductive nanometals, conductive polymers, and ionomers.

9. The multiple cannula of claim 1,

at least one of the wear-resistant layers includes a polymer resin formed into a fine mesh shape by chain or net bonding of small units, and antistatic particles are bonded to the fine mesh structure.

10. The multiple cannula of claim 1,

in the joint portion, both the adhesive layer and the stretch layer are melted and joined.

11. A cable protection device is provided, in which,

the method comprises the following steps:

the multiple cannula of any one of claims 1-10;