JPH1045369A - Handrail for moving passage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handrail for moving passage, which can effectively prevent electrostatic charges caused by friction with a guide rail and which ensures good sliding performance in the running operation. SOLUTION: A handrail for a moving passage is structured so that facial canvases 5 formed from conductive wires as warps or wafts arranged at certain intervals and a plurality of polyeter canvases 6 are laminated while a reinforcing member 7 is interposed in between. The structure is solidified by pressure attachment using adhesive rubber and a core body 4 is formed in a C-section and thereupon a decorative rubber layer 11 is provided. The conductive wire used may be a conductive thread 10 formed by winding a carbon fiber 9 on a polyester thread 8 or a conductive cord formed from a conductive polyamide resin with which carbon power is mixed and which is shaped into a cord form.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handrail for a moving passage, and more particularly to a handrail for a moving passage in which electrification due to friction with a guide rail is prevented.

[0002]

2. Description of the Related Art Conventionally, a handrail (handrail) used for a moving passage such as an escalator or a moving sidewalk (automatic line) has a built-in strength member 1 such as a wire cord as shown in FIG. A core 2 is formed by laminating a plurality of canvases with an adhesive rubber or the like so as to have a substantially C-shaped cross section, and a decorative rubber layer 3 provided on the outer surface thereof.

[0003] By the way, in use, the handrail constructed as described above is fitted on the outer circumference of a fixed guide rail, travels along this rail and goes around endlessly. The contact surface of
Instead of metals such as iron, stainless steel, and aluminum, those formed of synthetic resins such as polyethylene, polyester, polyamide, and polyacetal are used.

Conventionally, cotton canvas has been used as a handrail canvas. However, in recent years, handrail strength has been improved, water resistance has been improved when used indoors, frictional resistance with guide rails has been reduced, and abrasion resistance has been reduced. For the purpose of improvement, etc., use only the innermost surface canvas in contact with the guide rail, or all canvases including this surface canvas, using synthetic fibers such as polyvinyl alcohol-based, polyester-based, polyolefin-based, polyamide-based, and acrylic-based fabrics. The canvas is often woven with a aligned or twisted yarn (vinylon yarn, polyester yarn, polyethylene yarn, polypropylene yarn, nylon yarn, acrylic yarn).

[0005]

However, the handrail using such a canvas has a problem in that, when running, static electricity is generated due to friction with the synthetic resin guide rail and the entire handrail is charged. there were.

That is, cotton fibers have a relatively low electric resistance, and the electric charges generated by friction move and dissipate in a short time. Therefore, in the case of a handrail using a cotton canvas, there is almost no possibility that the entire handrail will be charged. Since the fiber has extremely high electrical insulation, the electric charge generated by the friction between the synthetic fiber canvas and the guide rail hardly moves and disappears, and the entire handrail, especially the surface of the decorative rubber layer, is charged. In some cases, it could reach a thousand volts.

When a passenger touches the surface of the handrail thus charged, an electric current flows instantaneously in the body, so that an unpleasant electric shock is felt. Even dust on the surface of the cosmetic rubber layer,
There is a problem in that dust or the like adheres and the appearance is impaired.

In order to solve such a problem, a handrail has been proposed in which an adhesive rubber layer for laminating and integrating a canvas is made of conductive rubber to prevent electrification (Japanese Patent Application Laid-Open (JP-A) no. No. 63-173174).

However, in this handrail, in order to prevent an increase in friction with the guide rail and a decrease in slipperiness (slidability) due thereto, a conductive rubber layer is formed on the innermost surface of the weaving yarn of the surface canvas. It is provided so that it does not seep out from between,
The conductive layer is not exposed. For this reason, there is a problem that it is difficult to take ground and the antistatic property is not sufficient.

SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and an object of the present invention is to provide a handrail for a moving passage which has a high effect of preventing electrification due to friction with a guide rail and has a good running sliding property. And

[0011]

SUMMARY OF THE INVENTION A handrail for a moving passage according to the present invention has a built-in strength member and a plurality of canvases each having a cross section of approximately C.
In a handrail for a moving passage provided with a decorative rubber layer on a core body laminated and formed to form a letter shape, at least the innermost canvas among the canvases has a conductive yarn as a woven yarn. Features.

Further, a handrail for a moving passage according to a second invention of the present invention is characterized in that a decorative rubber layer is formed on a core body which has a built-in strength member and is formed by laminating a plurality of canvases so as to have a substantially C-shaped cross section. In the handrail for a moving passage provided with a conductive cloth, a conductive string is woven into at least the innermost one of the canvases.

In the present invention, the strength member may be a wire cord formed by twisting steel wires, a stranded wire formed by twisting high tensile strength synthetic fibers such as polyamide fiber or aramid fiber, or a steel strip, stainless steel strip, or synthetic resin strip. A bendable band having such a high tensile strength is used.

In the present invention, the canvas which is stacked on the upper and lower sides of such a strength member and laminated and integrated via an adhesive rubber or the like is located at the innermost side of the handrail and is in sliding contact with the outer peripheral surface of the guide rail. Surface canvas, and two to five layers of inner canvas which are laminated on the outside and are not exposed to the surface.
In the first invention, at least the surface canvas of the plurality of canvases is a canvas woven with conductive yarns, and in the second invention, at least the surface canvas has a conductive fabric. In any of the inventions, in addition to having good running slipperiness, charging due to friction with the guide rail is effectively prevented.

In the first aspect of the present invention, the conductive yarn includes not only a yarn obtained by aligning or twisting conductive fibers, but also, for example, a conductive fiber formed on the outer periphery of a synthetic yarn obtained by aligning or twisting synthetic fibers. For example, a yarn in which conductive fibers and synthetic fibers are composited, such as a yarn wound spirally, can be used. Here, as the conductive fiber, in addition to the carbon fiber, a fiber obtained by plating a thin metal on the outer peripheral surface of the synthetic fiber (for example, Metax manufactured by Takase Dyeing Co., Ltd.), or a conductive metal compound and the synthetic fiber are chemically synthesized. A bonded fiber (for example, Sandaron manufactured by Japan Silkworm Dyeing Co., Ltd.), a fiber in which carbon particles are wrapped with a synthetic fiber (for example, Bertron manufactured by Kanebo Co., Ltd.), and the like can be used.

Among such conductive yarns, in particular, in a yarn in which conductive fibers are spirally wound around the outer periphery, the conductive fibers are exposed and arranged at regular intervals in the longitudinal direction. If the portion is grounded (for example, in contact with a grounded conductor), the charged charges can be immediately discharged over the entire length of the yarn. Therefore, when a canvas woven with such conductive yarns is used, an increase in material cost due to the use of conductive fibers can be minimized, and a sufficient antistatic effect can be achieved.

Further, in the first aspect of the present invention, as described above, the conductive yarn has a volume resistivity of 1 × so that the electric charges can be quickly released over the entire length at one ground. It is desirable to use one with 10 ⁶ Ω · cm or less.

Furthermore, in a canvas having such conductive yarns, not all the yarns need to be conductive yarns. For example, all the warp yarns arranged in parallel to the longitudinal direction (progression direction) of the handrail are used. By using conductive yarns at intervals of 2 to 20 mm, electric charges generated by friction with the guide rails can be quickly dispersed and moved in the longitudinal direction of the handrail and removed by grounding or the like. .

In the second aspect of the present invention, the conductive string may be a thin metal foil cut into a thin strip, or a conductive string containing a conductive material such as metal powder or carbon powder. A resin material formed into a string shape having a round or flat cross section or the like can be used. Note that it is desirable to use one having a volume resistivity of 1 × 10 ⁶ Ω · cm or less so that charges can be quickly released over the entire length by one ground.

Further, in a canvas in which such a conductive string is woven, a sufficient effect can be obtained by weaving the conductive string in a vertical direction at an appropriate interval. Can be raised. In particular, as warp yarns arranged in parallel to the longitudinal direction (progression direction) of the handrail,
When the conductive cords are woven at intervals of mm, electric charges generated by friction with the guide rails can be quickly dispersed in the longitudinal direction of the handrail and removed by grounding or the like.

Further, in the first and second aspects of the present invention, the adhesive rubber layer for laminating the canvas containing the conductive yarn or the conductive string as described above may be chloroprene rubber, nitrile rubber, butyl rubber, ethylene-propylene. A layer made of conductive rubber in which a polar or non-polar rubber such as rubber is mixed with a metal powder such as carbon black, aluminum, nickel, and silver, and a conductive filler such as carbon short fiber and stainless steel short fiber. The antistatic effect over the entire length of the handrail can be maintained semipermanently for a longer period of time.

That is, when the conductive yarn or the conductive string is cut by friction with the guide rails as the handrail travels, conduction (movement of electric charge) is interrupted and the effect of releasing the electric charge is lost. By providing a conductive rubber layer on the back surface of the canvas including the conductive yarn or the string-like body, even if the conductive yarn or the like exposed on the inner surface of the handrail is cut, the entire length of the handrail through the conductive rubber layer is cut off. Is maintained, and the effect of releasing electric charges is continuously exhibited. Furthermore, when a canvas is used in which a part of the warp is made of a conductive yarn or a conductive string at a certain interval, the entire width of the handrail is charged through such a conductive rubber layer. Since the electric charge can be released instantaneously, it is extremely easy to ground the conductive thread or the string and remove the electric charge.

As the conductive rubber having such an effect, it is desirable to use a conductive rubber having a volume resistivity of 1 × 10 ³ to 1 × 10 ⁷ Ω · cm. If the volume resistivity of the conductive rubber exceeds 1 × 10 ⁷ Ωcm, the conductivity will be insufficient, and the effect of complementing the charge removal by the conductive thread or string will be sufficiently exhibited. Can not do it. Also,
If the volume resistivity is less than 10 ³ Ω · cm, it is not preferable because mechanical properties such as viscosity and elongation are deteriorated by a conductive filler added in a large amount to reduce the resistivity.

[0024]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view showing one embodiment of a handrail for a moving passage according to the present invention.

In the drawing, reference numeral 4 denotes a core body, which is composed of one surface canvas 5 and a plurality of polyester canvases 6 plain-woven with polyester yarn, and a plurality of strength members 7 such as wire cords. It is formed by sandwiching and laminating, pressing and integrating with an adhesive rubber (not shown), and molding into a C-shaped cross section. As shown in the enlarged view of FIG. 2, the surface canvas 5 located on the innermost side and in contact with the guide rail is made of ordinary polyester yarn 8 as the whole weft yarn and most of the warp yarn, and carbon fiber around the outer periphery of the polyester yarn 8. Conductive yarns 10 spirally wound around 9 are arranged as warp yarns every 2 to 20 mm, and are plain-woven. Further, a decorative rubber layer 11 is integrally provided on the core 4 formed by laminating the surface canvas 5 and the polyester canvas 6.

In the handrail for a moving passage of the embodiment constructed as described above, the surface canvas 5 includes the conductive yarns 10 in which the carbon fibers 9 are wound around the outer periphery of the polyester yarns 8 at regular intervals as warp yarns. As a result, the generation of electric charge due to friction between the surface canvas 5 and the guide rail made of synthetic resin is suppressed, and the generated electric charge is quickly dispersed and moved in the longitudinal direction of the handrail via the conductive thread 9. Run away. Therefore, the charged charge is removed below the human body's perception limit over the entire length of the handrail.

The handrail of this embodiment was actually set on a revolving handrail belt tester and subjected to a continuous driving test for 1000 hours.
It was 1000V or less, and no electric shock was felt even when touched. On the other hand, with a handrail using only ordinary polyester canvas, a continuous driving test was performed under the same conditions.
Reached 3000V and felt a strong electric shock when touched.

Next, another embodiment of the present invention will be described.

In this embodiment, a decorative rubber layer is integrally provided on a core formed by laminating a plurality of canvases with a plurality of strength members interposed therebetween, pressing and integrating them with adhesive rubber, and forming a C-shaped cross section. In the handrail for the moving passage, the innermost surface fabric which is in contact with the guide rail is made of ordinary polyester yarn 8 as the entire warp yarn and most of the weft yarn as shown in FIG. It has a plain weave structure in which conductive cords 12 obtained by forming the compounded conductive polyamide resin into a cord having a circular cross section with a diameter of 0.5 mm are woven as wefts at intervals of 10 to 20 mm.

In the handrail for a moving passage of the embodiment constructed as described above, the conductive cords 12 are woven at regular intervals as wefts of the surface canvas, so that the surface canvas and the synthetic resin guide rail are connected to each other. The generation of charge due to friction is suppressed, and the generated charge quickly moves in the width direction of the handrail via the conductive cord 12 woven into the surface canvas, and escapes to the grounding strip on the guide rail side. Therefore, the charged charges are not accumulated in the handrail, and are removed below the limit of human body detection.

Further, in the handrail for the moving passage of this embodiment, the process of spinning or twisting the conductive fiber can be omitted as compared with the production of the conductive yarn 10 in which the carbon fiber 9 is wound around the polyester yarn 8. Because it is possible, conductive string 12
Is easy to form, and the manufacturing cost of the handrail can be reduced. Furthermore, since the conductive string 12 has better durability than the conductive thread 10 and does not break even after long-term use, the antistatic effect of the handrail is continuously maintained.

The handrail of this embodiment was also actually put on a circulating handrail belt tester and subjected to a continuous driving test for 1000 hours.
It was as follows, and no electric shock was felt even when touched.

In the above first and second embodiments, only the surface canvas 5 is a canvas woven by mixing the conductive yarns 10 or the conductive cords 12 at regular intervals in the vertical or horizontal direction. However, the entire canvas may be a canvas having such a structure. As the rubber for laminating and integrating a plurality of canvases including the surface canvas 5, a conductive rubber obtained by adding a conductive filler to a polar or non-polar adhesive rubber can be used. The antistatic effect of the yarn 10 or the conductive cord 12 can be reinforced, and the antistatic property over the entire length of the handrail can be maintained semipermanently.

[0035]

As described above, in the handrail for a moving passage of the present invention, at least the innermost surface canvas is a canvas in which conductive yarns or cords are woven. Charging due to friction with the rails is prevented, passengers who touch the handrail do not feel uncomfortable electric shock, and the decorative rubber layer is not contaminated by adhesion of dust and dirt. Furthermore, the running slip property is good, and stable running can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of a handrail for a moving passage of the present invention.

FIG. 2 is an enlarged plan view showing a surface canvas used in the embodiment.

FIG. 3 is an enlarged plan view showing a surface canvas used in another embodiment of the handrail for a moving passage according to the present invention.

FIG. 4 is a cross-sectional view showing the structure of a conventional handrail for a moving passage.

[Description of Signs] 5 Surface canvas 6 Polyester canvas 6 7 Strength member 8 Polyester thread 9 Carbon fiber 10 Conductive thread 11 Cosmetic rubber layer 12 ... conductive string

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Junichiro Mori 2-1-1, Oda Sakae, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Inside Showa Electric Wire & Cable Co., Ltd. (72) Isao Yatomi 2 Ei Oda, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture 1-1-1, Showa Electric Wire & Cable Co., Ltd. (72) Inventor Toshio Kida 2-1-1, Sakae Oda, Kawasaki-ku, Kawasaki-city, Kanagawa Prefecture In-Showa Electric Wire & Cable Co., Ltd. (72) Kunio Yasuda Toshiba, Fuchu-shi, Tokyo No. 1, Toshiba Corporation Fuchu Plant (72) Inventor Ichiro Imai 1000, Hamada, Aboshi-ku, Himeji-shi, Hyogo Prefecture Toshiba Elevator Products Co., Ltd.

Claims (5)

[Claims] 1. A handrail for a moving passage provided with a decorative rubber layer on a core body in which a strength member is built in and a plurality of canvases are laminated and formed so as to have a substantially C-shaped cross section. A handrail for a moving passage, wherein at least the innermost fabric has a conductive yarn as a woven yarn. 2. The handrail for a moving passage according to claim 1, wherein the conductive yarn is disposed at a predetermined interval as a warp yarn in at least the innermost canvas. 3. The handrail for a moving passage according to claim 1, wherein the conductive yarn is formed by spirally winding conductive fibers around a cotton yarn or a synthetic fiber yarn. 4. A handrail for a moving passage provided with a decorative rubber layer on a core body in which a strength member is built in and a plurality of canvases are laminated and formed so as to have a substantially C-shaped cross section. A handrail for a moving passage, wherein a conductive string is woven into at least the innermost canvas. 5. The handrail for a moving passage according to claim 1, wherein a canvas in which a conductive thread or a conductive string is woven is laminated via a conductive rubber layer. .