KR20210055605A - Sleeve for cables protection apparatus and cables protectoin apparatus comprising the same - Google Patents

Abstract

The present invention relates to a sleeve for a cable protection device and a cable protection device including the same. Specifically, the present invention relates to a sleeve for a cable protection device and a cable protection device including the same, wherein the sleeve for a cable protection device can prevent damage to cables by protecting and more stably supporting the cables used in moving objects such as machine tools, electronic devices, industrial robots, and transport machines which perform repetitive movements, and is suitable for a production process of ultra-precision and high-purity products such as semiconductor wafers since process errors caused by static electricity can be suppressed through antistatic treatment which maintains the effect for a long time.

Description

A sleeve for a cable protection device, and a cable protection device comprising the same.

The present invention relates to a sleeve for a cable protection device and a cable protection device including the same. Specifically, the present invention can prevent damage to the cables by protecting and stably supporting cables used in moving objects such as machine tools, electronic devices, industrial robots, and transport machines that perform repetitive movements. In addition, it is possible to suppress process errors caused by static electricity through antistatic treatment that is effective for a long time, so it is suitable for the production process of ultra-precision and high-purity products such as semiconductor wafers. About.

Flexible cables or hoses such as wire cables, fiber optic cables, fluid supply hoses, etc. (hereinafter referred to as'cables') used for moving objects such as machine tools, electronic devices, industrial robots, and transport machines are used to move the moving objects. Cable protection that can prevent damage to the cables used in the moving body by protecting and stably supporting the cables because the cables may be damaged by excessive twisting of the cables or the tensile force applied to the cables. The device is being used.

The conventional cable protection device includes a flexible sleeve including one or more pods into which a wire cable corresponding to cables, a fluid supply hose, etc. are inserted, and the sleeve is usually It can be made of a polymer material.

When the sleeve is made of a polymer material, particularly a fluorine-based polymer having strong characteristics to be charged, such as polytetrafluoroethylene, since it is easily charged by friction, the cable protection device used for the moving body during repeated movement of the moving body When a portion of the flexible sleeve constituting the component constantly rubs against another portion, the surface of the flexible sleeve may be charged and a process error may be caused due to static electricity generated on the surface of the charged sleeve.

Therefore, the sleeve needs antistatic treatment to prevent electrification. The antistatic treatment technology is largely divided into a method of using a grounding, a method of using an ionizer, and a method of treating the surface of the sleeve with an antistatic solution. The method of using the ground is a method of forming an electrical circuit capable of removing static electricity from the charged sleeve by connecting a charged sleeve with a ground terminal. It is difficult to be applied to a cable protection device used for a moving body with a lot of movement. there is a problem.

On the other hand, the method of using an ionizer is a method of neutralizing the charged sleeve by ionizing particles existing in the air with an ionizer with positive or negative ions, and requires additional and continuous maintenance of the ionizer. In addition, in the method of treating the sleeve surface with an antistatic solution, the antistatic solution is easily removed by friction on the sleeve surface, so that the antistatic effect can be maintained for a long time when applied to a sleeve for a cable protection device used for a moving object that moves repeatedly. There is a problem that cannot be done.

Accordingly, the present invention can prevent damage to the cables by protecting and stably supporting cables used in moving objects such as machine tools, electronic devices, industrial robots, and transport machines that perform repetitive movements. In addition, a sleeve for a cable protection device suitable for the production process of ultra-precision and high-purity products such as semiconductor wafers and a cable protection device including the same is desperately needed because process errors caused by static electricity can be suppressed through antistatic treatment that is effective for a long time. The situation is being demanded.

The present invention can prevent damage to the cables by protecting and stably supporting cables used in moving objects such as machine tools, electronic devices, industrial robots, and transport machines that perform repetitive movements, and for a long time. It is to provide a sleeve for a cable protection device suitable for the production process of ultra-precision and high-purity products such as semiconductor wafers, and a cable protection device including the same, because process errors caused by static electricity can be suppressed through the antistatic treatment that maintains the effect during operation. The purpose.

In order to solve the above problems, the present invention,

A sleeve for a cable protection device, wherein the sleeve is formed by partial bonding of an upper flexible member and a lower flexible member, and is formed by a non-joined portion between the bonding portions of the upper flexible member and the lower flexible member. And one or more pods formed, wherein the upper flexible member and the lower flexible member include an elastic layer made of a flexible resin and a wear-resistant layer stacked on at least one of the upper and lower surfaces of the elastic layer. Including, wherein the wear-resistant layer provides a sleeve for a cable protection device comprising a porous polymer resin and an antistatic material at least partially adsorbed to the porous polymer resin.

Here, the antistatic material provides a sleeve for a cable protection device, characterized in that at least partially adsorbed to the fiber strands forming the mesh structure of the porous polymer resin.

In addition, it provides a sleeve for a cable protection device, characterized in that the surface resistance of the wear-resistant layer is 10 ⁵ to 10 ^{10 Ω/square.}

Here, the antistatic material provides a sleeve for a cable protection device, characterized in that it is included from at least one of the upper and lower surfaces of the wear-resistant layer to a depth of 10% of the thickness of the wear-resistant layer. .

In addition, the antistatic material provides a sleeve for a cable protection device, characterized in that it is contained in a depth of 10 μm from the surface of the wear-resistant layer.

In addition, the antistatic material is characterized in that included in the upper surface of the wear-resistant layer of the upper flexible member and the lower surface of the wear-resistant layer of the lower flexible member to a depth of 10 μm, respectively, Provides a sleeve.

Here, the elastic layer has a thickness of 0.4 to 0.6 mm, and the wear-resistant layer has a thickness of 0.05 to 0.15 mm. A sleeve for a cable protection device is provided.

In addition, the antistatic material provides a sleeve for a cable protection device, characterized in that the melt viscosity is 0.7 to 3 cPs (@20° C.).

Here, the antistatic material has a freezing point of -120 to -100°C, a spontaneous ignition temperature of 300°C or more, and a specific gravity of 0.5 to 0.9, providing a sleeve for a cable protection device.

In addition, the antistatic material provides a sleeve for a cable protection device, characterized in that phosphorus (P) is added and comprises a conductive low molecular weight material having a molecular weight of less than 100.

On the other hand, it provides a sleeve for a cable protection device, characterized in that the pore size of the porous polymer resin is 0.03 to 0.15 ㎛.

Here, the porous polymer resin provides a sleeve for a cable protection device, characterized in that it contains expanded polytetrafluoroethylene (ePTFE).

In addition, the elastic layer provides a sleeve for a cable protection device, characterized in that it comprises a polyurethane resin.

On the other hand, the pod provides a sleeve for a cable protection device, characterized in that it has a circular, oval, rectangular or corrugated cross section.

And, it provides a sleeve for a cable protection device, characterized in that it comprises a plurality of pods arranged in the vertical and left and right directions.

On the other hand, the sleeve; A guide chain inserted into and received in one or more pods of the sleeve; And a clamp disposed at both ends of the sleeve to fix and seal both ends of the pod.

Sleeve for cable-current protection device according to the invention is maintained, despite the repeated friction to the surface through an iterative movement caused by being applied to the cables and protection device for protecting the cables and the like used in mobile and kinds of antistatic effect for a long time It shows an excellent effect that can be achieved.

1 schematically shows a cable protection device according to the present invention.
FIG. 2 schematically shows a state in which cables and a guide chain are inserted into a sleeve in the cable protection device shown in FIG. 1.
FIG. 3 schematically shows one embodiment of a cross section AA′ of the flexible sleeve in FIG. 1.
4 is an enlarged view of a portion divided by a broken line in FIG. 3.
5 is an electron micrograph showing the structure of an expanded polytetrafluoroethylene resin.
6 schematically shows an antistatic material adsorbed to the porous structure of the expanded polytetrafluoroethylene resin shown in FIG. 5.
7 schematically shows another embodiment of the cross section AA′ in FIG. 1.
8 is a graph showing the result of evaluating the amount of static electricity in the long-term reliability evaluation among Examples.
9 is a graph showing the results of surface resistance evaluation in the long-term reliability evaluation among Examples.

Hereinafter, preferred embodiments of the present invention will be described in detail. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content may be thorough and complete, and the spirit of the present invention may be sufficiently conveyed to those skilled in the art. The same reference numerals represent the same elements throughout the specification.

1 schematically shows a cable protection device according to the present invention, and FIG. 2 schematically shows a state in which cables and a guide chain are inserted into a sleeve in the cable protection device shown in FIG. 1.

1 and 2, the cable protection device according to the present invention includes at least one cable 200, a guide chain 100, a fluid supply hose (not shown), etc. that can be inserted and accommodated. A flexible sleeve 500 including a pod 510, one or more pods 510 of the flexible sleeve 500, preferably inserted into and received at one or more pods 510 disposed at the outermost side And a clamp 600 disposed at both ends of the flexible sleeve 500 to fix and seal both ends of the pod 510.

FIG. 3 schematically shows one embodiment of the cross section A-A′ of the flexible sleeve in FIG. 1.

As shown in FIG. 3, one or more pods 510 into which cables 200 and guide chains 100 are inserted and accommodated in the flexible sleeve 500 prevent damage to cables, etc. It is not particularly limited as long as it performs the function of suppressing and can accommodate cables or the like, and may have, for example, a circular, elliptical, rectangular, or wavy cross-section.

In addition, since the flexible sleeve 500 is made of a material having excellent flexibility, the bend radius of the bent portion is small, so it can be used in a narrow space, and continuous bending and linear motion are repeated. Even damage can be suppressed.

4 is an enlarged view of a portion divided by a broken line in FIG. 3.

As shown in FIG. 4, the flexible sleeve 500 is formed by partial bonding of an upper flexible member and a lower flexible member, and bonding between the bonding portions of the upper flexible member and the lower flexible member. One or more pods 510 are formed by a portion that is not, and each of the upper and lower flexible members is formed of an elastic layer 511 made of a flexible resin such as polyurethane, and at least one of the upper and lower surfaces thereof. One may be made of a material including a wear-resistant layer 512 in which a resin having excellent abrasion resistance and lubricity such as fluorine resin and a low friction coefficient is stacked. In particular, the wear-resistant layer 512 is the pod 510 It can be disposed on the inner and outer surfaces of the. Here, the thickness of the elastic layer 511 may be about 0.4 to 0.6 mm, and the thickness of the wear-resistant layer 512 may be 0.05 to 0.15 mm.

Since the wear-resistant layer 512 is excellent in wear resistance and lubricity and has a low coefficient of friction, when it is disposed on the inner surface of the pod 510, it is damaged by friction with cables that are inserted and accommodated in the pod 510. At the same time, it is possible to avoid or suppress the occurrence of dust while preventing or suppressing the occurrence of dust due to the friction, while avoiding or suppressing damage due to friction between the flexible sleeves 500 when disposed on the outer surface of the pod 510 At the same time, generation of dust due to the friction can be suppressed.

The resin forming the wear-resistant layer 512 may be selected from, for example, polytetrafluoroethylene (PTFE), fluoroethylene propylene (FEP), polyfluoroalkoxy (PFA), and the like, preferably poly It may be tetrafluoroethylene (PTFE), more preferably expanded polytetrafluoroethylene (ePTFE).

5 is an electron micrograph showing the structure of the expanded polytetrafluoroethylene resin, and FIG. 6 schematically shows a state in which an antistatic material is adsorbed to the porous structure of the expanded polytetrafluoroethylene resin shown in FIG. will be.

As shown in FIG. 5, the expanded polytetrafluoroethylene (ePTFE) is a polymer material made by chemically bonding small units in a chain or net form, and has a porous structure in which micropores are formed, for example, pores. ) It is composed of a porous structure with a size of 0.03 to 0.15 µm, has excellent heat resistance and chemical resistance, and has a very low coefficient of friction. In particular, it is chemically resistant to all chemicals, and its surface is smooth and its physical properties can be maintained over a wide temperature range.

However, since the expanded polytetrafluoroethylene (ePTFE) has a strong tendency to be charged with a negative charge, it is easy to generate static electricity, so dust in the air may adhere to the wear-resistant layer 512 and cause a process error, etc. And, when used, it may cause static electricity.

Accordingly, the wear-resistant layer 512, in particular, the wear-resistant layer 512 disposed on the outer surface of the pod 510 may be subjected to an antistatic treatment. The antistatic treatment may be performed in the form of immersing the material of the flexible sleeve 500 in an antistatic solution or spraying an antistatic solution on the surface of the flexible sleeve 500.

The antistatic solution is an antistatic material having a positive or negative charge, such as a conductive nano carbon or metal or a conductive polymer or ionomer, a conductive low molecular weight material having a molecular weight of less than 100, for example, a molecular weight of 20 to 70, and the antistatic material is dispersed. It may contain a volatile solvent, a surfactant that facilitates dispersion of the material, and the like.

Here, the conductive polymer or ionomer may be selected from polyacetylene, polypyrrole, polythiophene, polyphenylene, polyphenylene sulfide, polyfuran, polyaniline, and the like, and the conductive low molecular weight material is preferably phosphorus (P). It may be a conductive low molecular weight material having an added molecular weight of less than 100. In addition, the solvent may be a solvent such as an acrylic solvent such as acrylate or an alcoholic solvent such as isopropyl alcohol.

The antistatic solution is a solute having a high volatilization temperature in a volatile solvent, and the antistatic material is dissolved, and when this solution is sprayed onto the wear resistant layer 512 or the wear resistant layer 512 is immersed in the solution, The antistatic solution contains micropores of the wear-resistant layer 512, in particular, the surface of the wear-resistant layer 512, for example, the upper surface of the wear-resistant layer of the upper flexible member and the lower flexible member. From the lower surface of the wear-resistant layer to a depth of 10% of the thickness of the wear-resistant layer 512, for example, to a depth of about 100 nm, preferably to about 1 µm, more preferably to about 10 µm, The antistatic material may be at least partially adsorbed on the fiber strands forming the network structure of the porous polymer resin.

In this way, when the antistatic material is adsorbed to about 10 μm of the wear-resistant layer 512, the antistatic material is stably adsorbed to the sleeve for a cable protection device for a long time even if it is used for a moving body that performs repetitive movement. It can maintain the effect of suppressing process errors caused by static electricity.

In addition, the antistatic material penetrates into micropores such as expanded polytetrafluoroethylene (ePTFE) forming the wear-resistant layer through the volatile solvent, and when the volatile solvent is volatilized at a certain temperature and time, FIG. 6 As shown in Figure 2, only the antistatic material remains, and the expanded polytetrafluoroethylene (ePTFE) is remarkably charged by adsorbing to the fiber strands of the net forming the micropores with its own wetting property. It may be lowered, and the surface resistance of the wear-resistant layer 512 may be adjusted to 10 ^{5 to 10 10} Ω/square.

In particular, the antistatic material has a melt viscosity of 0.7 to 3 cPs (@20° C.), preferably 1 to 1.25 cPs to sufficiently adsorb to the fiber strands forming the mesh structure of the expanded polytetrafluoroethylene (ePTFE). It may be (@20℃).

Here, when the melt viscosity of the antistatic material is less than 0.7 cPs (@20°C), the micropores are not adsorbed to the fiber strands at room temperature and pass through the micropores of the network structure of the expanded polytetrafluoroethylene (ePTFE). Although it cannot remain inside or is adsorbed to the fiber strands, it is not firmly adsorbed and is removed upon friction of the surface of the wear-resistant layer 512, whereas when it exceeds 3 cPs (@20° C.), the expanded polytetrafluoroethylene ( ePTFE) has a problem in that the antistatic effect cannot be maintained for a long time because it remains on the surface of the wear-resistant layer 512 because it is difficult to penetrate the fine pores of the mesh structure of ePTFE.

Further, the antistatic material may have a freezing point of -120 to -100°C, a spontaneous ignition temperature of 300°C or more, and a specific gravity of 0.5 to 0.9.

As described above, the antistatic material having a positive or negative charge does not remain on the surface of the wear-resistant layer 512, but firmly adsorbs and remains on the fiber strands of the internal fine mesh structure even at room temperature. The antistatic function can be stably performed for a long time without being removed by friction between the wear resistant layers 512 and without deteriorating the physical properties of the wear resistant layer 512.

7 schematically shows another embodiment of the cross section A-A' in FIG. 1.

As shown in FIG. 7, the sleeve 500 for a cable protection device according to the present invention may have a multilayer structure in which a plurality of pods 510 are arranged in a vertical direction.

On the other hand, the guide chain 100 is inserted into one or more pods, preferably the outermost pods of the flexible sleeve, and supports a function to maintain each shape in a straight portion and a bent portion of the flexible sleeve. It can be carried out, and can be made of a material such as metal or plastic.

In addition, the clamp 600 can suppress the discharge of dust generated by friction between the inner surface of the pod 510 and the cables 200 inserted therein, thereby producing ultra-precision and high-purity products such as semiconductor wafers. It is suitable for use in the process.

[Example]

1. Manufacturing example

A sleeve specimen having a wear-resistant layer to which an antistatic treatment was applied to the resin shown in Table 1 below was prepared.

Example
(Antistatic product) Comparative example
(General product) Suzy ePTFE ePTFE Antistatic material Conductive low molecular weight material to which phosphorus (P) is added
(Viscosity: 1.17 cPs(@20℃); Molecular weight: 46.07) none

2. Triboelectricity test

Static electricity after rubbing the cotton cloth or blanket on the surface of the sleeve specimens of Examples and Comparative Examples at a rate of 400 r/min in an environment of 20±2℃ and 40±2% RH according to the standard KS K 0555 (2015, Method B). The amount of static electricity was measured using a measuring device (manufacturer: SIMCO; product name: FMX-004). Here, as for the amount of static electricity, the maximum value was selected from among the values measured by selecting any five of the surfaces of the sleeve specimen. The result of measuring the amount of static electricity is as shown in Table 2 below,

Example Comparative example Static electricity amount (V) Static electricity amount (V) Cotton cloth 10≥ 7,500 Blanket 10≥ 7,700 Mutual friction 10≥ 4,100

In addition, the A4 paper was rubbed against the sleeve specimen 5 times in an environment of 23°C and 16% RH, and then the amount of static electricity was measured. Here, as for the amount of static electricity, the maximum value was selected from among the values measured by selecting any five of the surfaces of the sleeve specimen. The result of measuring the amount of static electricity is as shown in Table 3 below.

Example Comparative example Before friction After rubbing Before friction After rubbing Static electricity (kV) 0.00 0.02 0.04 1.28

3. Long-term reliability evaluation

As shown in the figure below, an electrostatic meter (manufacturer: SIMCO; product name: FMX-004) after mutual friction of the sleeve specimen by fixing one end (fixed part) of the sleeve specimen of the embodiment and moving the other end (Moving part) linearly and reciprocating. ) And a surface resistance meter (manufacturer: SIMCO; product name: ST-4) measured the amount of static electricity and surface resistance according to the number of driving, and the result of measuring the amount of static electricity in the embodiment is as shown in FIG. 8, and the surface resistance measurement of the embodiment The results are as shown in FIG. 9.

As shown in Tables 1 to 3 and FIGS. 8 and 9, the sleeve specimen of the embodiment according to the present invention is excellent by adsorbing an antistatic material having a precisely controlled melt viscosity on the expanded polytetrafluoroethyl resin having a porous structure. It showed electrostatic dissipation, and it was confirmed that this characteristic is maintained for a long time.

Although the present specification has been described with reference to preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the claims described below. You can do Therefore, if the modified implementation basically includes the elements of the claims of the present invention, it should be seen that all are included in the technical scope of the present invention.

100: guide chain 200: cables
500: flexible sleeve 600: clamp

Claims (16)

As a sleeve for cable protection devices,
The sleeve is formed by partial bonding of the upper flexible member and the lower flexible member,
At least one pod formed by a non-bonded portion between the upper flexible member and the joint portions of the lower flexible member,
The upper flexible member and the lower flexible member include an elastic layer made of a flexible resin and a wear-resistant layer laminated on at least one of upper and lower surfaces of the elastic layer,
The wear-resistant layer includes a porous polymer resin and an antistatic material at least partially adsorbed to the porous polymer resin. The method of claim 1,
The antistatic material is characterized in that at least partially adsorbed to the fiber strands forming the net structure of the porous polymer resin, the sleeve for a cable protection device. The method of claim 2,
The wear-resistant layer has a surface resistance of 10 ⁵ to 10 ¹⁰ Ω/square. The method of claim 3,
The antistatic material is contained in at least one of the upper surface and the lower surface of the wear-resistant layer to a depth of 10% of the thickness of the wear-resistant layer. The method of claim 4,
The antistatic material is contained in a depth of 10 ㎛ from the surface of the wear-resistant layer, sleeve for a cable protection device. The method of claim 5,
The antistatic material is contained in the upper surface of the wear-resistant layer of the upper flexible member and the lower surface of the wear-resistant layer of the lower flexible member to a depth of 10 μm, respectively. . The method of claim 6,
The elastic layer has a thickness of 0.4 to 0.6 mm, and the wear-resistant layer has a thickness of 0.05 to 0.15 mm. The method according to any one of claims 1 to 7,
The antistatic material has a melt viscosity of 0.7 to 3 cPs (@20° C.), characterized in that, a sleeve for a cable protection device. The method of claim 8,
The antistatic material has a freezing point of -120 to -100°C, a spontaneous ignition temperature of 300°C or more, and a specific gravity of 0.5 to 0.9. The method of claim 9,
The antistatic material is a sleeve for a cable protection device, characterized in that the phosphorus (P) is added and comprises a conductive low molecular weight material having a molecular weight of less than 100. The method according to any one of claims 1 to 7,
A sleeve for a cable protection device, characterized in that the pore size of the porous polymer resin is 0.03 to 0.15 µm. The method of claim 11,
The porous polymer resin is characterized in that it contains expanded polytetrafluoroethylene (ePTFE), a sleeve for a cable protection device. The method according to any one of claims 1 to 7,
The elastic layer is a sleeve for a cable protection device, characterized in that comprising a polyurethane resin. The method according to any one of claims 1 to 7,
The pod is a sleeve for a cable protection device, characterized in that it has a circular, oval, rectangular or corrugated cross-section. The method according to any one of claims 1 to 7,
A sleeve for a cable protection device comprising a plurality of pods arranged in the vertical and horizontal directions. The sleeve of any one of claims 1 to 7;
A guide chain inserted into and received in one or more pods of the sleeve; And
A cable protection device comprising a clamp disposed at both ends of the sleeve to fix and seal both ends of the pod.

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