JP2001287884A - Handrail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a handrail longitudinally expansible and contractible and having a large opening force. SOLUTION: This handrail is formed of a substantially C-shaped cross sectional core 2 formed by laminating plural sheets of canvas 2a and a decorative rubber 3 superposed on the back surface thereof. The thickness of the lateral yarn 12 forming the canvas 2a is set equal to or more than the thickness of the longitudinal yarn 11 forming the canvas 2a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handrail, and more particularly to a handrail used as a handrail for escalators or auto line passengers.

[0002]

2. Description of the Related Art Generally, escalators and auto lines installed in buildings such as department stores, stations, and airports are provided with handrails called handrails to stably transport passengers. As shown in FIG. 4, the handrail 41 has a substantially C-shaped cross section.
The opening side 41a is circulated along the guide rail while being engaged with the top of a guide rail (not shown) having a substantially T-shaped cross section, for example.

[0003] A handrail 41 includes a plurality of canvases 42a.
Are laminated and adhered with an adhesive rubber or the like, and a decorative rubber 43 is adhered to the back surface of a core body 42, and an endless endless belt is formed by connecting both ends. A tensile member 44 such as a steel cord, a steel tape, or aramid fiber is provided along the length of the core 42 or the decorative rubber 43.

As shown in FIGS. 4 and 5, the warp yarn (lengthwise yarn) 51 and the weft yarn (widthwise yarn) 52 forming the canvas 42a are made of the same material (for example, cotton or synthetic fiber). The cloth 42a is obtained by cutting a woven fabric (not shown) woven using a warp yarn 51 thicker than the weft yarn 52 in the length direction.

[0005] The handrail 41 continuously travels on the escalator traveling path for a long time, and receives a mechanical load such as bending, in addition to compression and friction, in the drive unit. A guide rail for guiding the handrail 41 is provided on the front side of the escalator where the occupant places his / her hand and on the bent portion of the terminal, and the guide rail slides on the opening side 41a of the handrail 41. Therefore, the opening 41a of the handrail 41 is subject to abrasion, bending deformation, and the like.

On the return side inside the escalator, the handrail 41 is worn or bent by a tension roller, a pulley, a guide roller, a centering roller, and the like. Further, in the case of pulley drive, since the handrail 41 is put in tension,
Is further increased.

When the load is repeatedly received, the cross-sectional shape of the handrail 41 is deformed, and the opening 41c of the jaw 41b is opened.
, The handrail 41 may come off the guide rail, or even if the handrail 41 does not come off, the gap between the guide or the pulley and the handrail 41 may increase in the terminal portion.

For this reason, when the handrail 41 is repeatedly bent, the size of the opening 41c of the jaw 41b is increased, or the opening 41c is easily opened outward (left and right in FIG. 4) by an external force. In order to avoid this, a plurality of (usually 4 to 5) canvases 42a are laminated, and each canvas is strongly adhered with adhesive rubber to form the core 42.

[0009]

Conventionally, a canvas 42a formed by cutting a woven fabric in which the warp yarn 51 is woven using a yarn thicker than the weft yarn 52 in the longitudinal direction is used as the warp yarn 51.
Since the core 42 is formed by laminating a plurality of sheets so that the length is in the length direction of the handrail 41, the handrail 41 is hard to extend in the length direction and easily stretches in the width direction.

As described above, the handrail 41 is repeatedly bent in the forward and reverse directions on the escalator running path. However, the handrail 41 is most susceptible to the stress due to this bending and affects the deformation of the handrail 41. This is the jaw 41b. The behavior of the warp yarn 51 of the jaw 41b at the time of bending is compression in the forward bending in which the opening side 41a of the handrail 41 is inside, and the opening side 41
In the reverse bending in which a is outside, it becomes tensile.

That is, in the conventional handrail 41 using the canvas 42a, the handrail 41 is easily deformed in the width direction due to repeated bending in the normal and reverse directions on the escalator running path, and the opening 41 of the jaw 41b is formed.
There is a problem that c spreads and the adhesive strength between the canvases 42a in the core body 42 is reduced. Therefore, in order to sufficiently secure a force for widening the opening 41c of the jaw 41b of the handrail 41 by a predetermined width (hereinafter, referred to as opening force),
The number of layers of the canvas 42a constituting the core body 42 had to be 4 to 5 layers.

SUMMARY OF THE INVENTION An object of the present invention, which has been made in view of the above circumstances, is to provide a handrail which has good stretchability in the length direction and a large opening force.

[0013]

In order to achieve the above-mentioned object, a handrail according to the present invention comprises a decorative rubber laminated on a back surface of a core having a substantially C-shaped cross section formed by laminating a plurality of canvases. In the handrail, the width of the yarn in the width direction forming the canvas is equal to or larger than the thickness of the yarn in the length direction forming the canvas.

According to the above construction, the stretchability in the length direction of the canvas is improved, and the bending resistance in the width direction is improved.

[0015] The yarn in the width direction and the yarn in the length direction may be formed of nylon fibers.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

A handrail according to a preferred embodiment of the present invention has the same structure as the handrail 41 shown in FIG. 4 except for a core. That is, as shown in FIGS.
In a handrail 1 according to a preferred embodiment of the present invention, a cross section is formed in a substantially C-shape, and an opening side 1a of the handrail 1 is engaged with a top of a guide rail (not shown) having a substantially T-shaped cross section. While being circulated along the guide rail, the width direction yarn (weft yarn) 12 and the length direction yarn (warp yarn) 11 have the same thickness on the side that comes into contact with the guide rail. A core 2 is formed by laminating a plurality of canvases 2a obtained by cutting a woven fabric (or the weft yarn 12 is thicker than the warp yarn 11) in the length direction so that the warp yarn 11 is in the length direction of the handrail 1. 2 and a decorative rubber 3 so as to cover the outside of the core 2.
The tensile member 4 is disposed between the canvases 2a, 2a having the core 2 (in FIG. 1, between the second canvas 2a and the third canvas 2a from the opening side 1a).

The warp yarn 11 and the weft yarn 12 of the canvas 2a are made of nylon fibers. This canvas 2
a, preferably a plurality of canvases 2a each having been subjected to a liquid rubber baking treatment on the surface thereof, and
The core 2 is formed by laminating an interlayer rubber (not shown) such as a natural rubber or a synthetic rubber as an adhesive therebetween. The warp yarn 11 and the weft yarn 12 may be either a single wire or a stranded wire (cord).

The tensile member 4 is not particularly limited, and examples thereof include steel cord, steel tape, aramid fiber woven fabric, and aramid fiber cord. An interlayer rubber (not shown) such as natural rubber or synthetic rubber is used as an adhesive between the tension member 4 provided inside the core member 2 and each canvas 2a in contact with the tension member 4. It is laminated.

The cosmetic rubber 3 is not particularly limited as long as it is a rubber having good tactile sensation, stain resistance, repetitive elongation, bending properties, and coloring properties. For example, chlorosulfonated polyethylene (CSM) ), Styrene butadiene rubber (SBR), chloroprene rubber (CR) and the like.

In the handrail 1 according to a preferred embodiment of the present invention, the weft 12 and the warp 11 of the canvas 2a have the same thickness or the weft 12 is thicker than the warp 11, so that the escalator is used. Handrail 1 on running path
When repeatedly bending in the normal and reverse directions, the canvas 2a is easily expanded and contracted in the length direction and hardly bent in the width direction, and as a result, the handrail 1 is hardly deformed in the width direction. .

Since the handrail 1 is hardly deformed in the width direction, the opening 1c of the jaw 1b can be easily formed.
There is no danger of widening, and there is no danger of the adhesive strength between the canvases 2a in the core 2 being reduced.

Further, the weft 12 and the warp 1 of the canvas 2a
1 to the same thickness or the weft 12 to be thicker than the warp 11, so that the conventional handrail 41 shown in FIGS.
As compared with the case, the number of layers of the canvas 2a required for the handrail 1 to secure a predetermined opening force is reduced, and the cost of the handrail 1 can be reduced. Also,
By configuring each of the yarns 11 and 12 with a nylon fiber having a high tensile strength, the number of layers of the canvas 2a can be further reduced.

Further, by forming each of the yarns 11 and 12 of the canvas 2a from nylon fiber, each of the yarns 11 and 1 of the canvas 2a is formed.
The wear resistance of the core body 2 can be improved and the life of the handrail 1 can be extended as compared with the case where the core rail 2 is made of cotton fiber.

The handrail 1 according to a preferred embodiment of the present invention has been described in which the tension member 4 is disposed inside the core 2, but the tension member 4 is disposed inside the decorative rubber 3.
Needless to say, it may be arranged.

[0026]

(Example 1) A warp yarn composed of 840-denyl 6,6-nylon monofilament and a 1,260-denyl 6,6-nylon
After forming a nylon fabric with a weft yarn formed by twisting three nylon single fibers, the nylon fabric is cut at a predetermined width in a length direction to form a canvas. Next, after baking liquid rubber on the surface of each canvas, three canvases are laminated so that the warp yarns are in the length direction of the handrail to form a core having a substantially C-shaped cross section. At this time, as a tensile body, a steel cord made by baking liquid rubber on the surface,
Eighteen, while being sandwiched between the second canvas and the third canvas from the opening side, interlayer rubber is sandwiched between each canvas and between the tensile member and the canvas.

Next, after a cosmetic rubber made of chlorosulfonated polyethylene was provided on the back side of the core body,
Vulcanization was carried out at 60 ° C. and a surface pressure of about 1.96 MPa (20 kgf / cm ² ) for 20 minutes to obtain a handrail.

(Comparative Example 1) A cotton fabric is formed from a warp yarn formed by twisting nine 10th cotton single fibers and a weft yarn formed by twisting seven 10th cotton single fibers. Is cut at a predetermined width in the length direction to form a canvas. next,
After baking liquid rubber on the surface of each canvas, four canvases are laminated so that the warp yarns are in the length direction of the handrail to form a core having a substantially C-shaped cross section. At this time, 18 steel cords whose surfaces were baked with liquid rubber were sandwiched between the second canvas and the third canvas from the opening side as the tensile bodies, and between the canvases and the tensile strength. An interlayer rubber is sandwiched between the body and the canvas.

Next, after a cosmetic rubber made of chlorosulfonated polyethylene was provided on the back side of the core,
Vulcanization was performed for 20 minutes at 60 ° C. and a surface pressure of about 1.96 MPa (20 kgf / cm ² ) to obtain a handrail (conventional handrail).

For the handrails of Example 1 and Comparative Example 1, the opening force (N) of the jaw and the change in the opening width before and after the running test using a model tester were measured. Here, as the opening force, a force required to increase the opening width of the jaw of the handrail by 7 mm was measured.

As a result, the opening force of the handrail of Example 1 was 180 to 200 N, which was equivalent to that of the handrail of Comparative Example 1 (190 to 220 N). The change in the opening width before and after the running test in the handrail of Example 1 was 2 to 4 mm, and the change in the opening width before and after the running test in the handrail of Comparative Example 1 (2 to 3).
mm).

That is, in the handrail of the first embodiment, the number of layers of the canvas constituting the core is one less than that of the handrail of the first comparative example. It was confirmed that it had the same level of repetitive bending resistance.

As described above, the embodiment of the present invention is not limited to the above-described embodiment, and it goes without saying that various other embodiments can be envisaged.

[0034]

In summary, according to the present invention, by making the weft and warp yarns of the canvas the same thickness or making the weft yarn thicker than the warp yarn, the handrail can be moved forward or backward on the escalator travel path. This provides an excellent effect that deformation in the width direction is unlikely to occur even when bending is repeatedly performed in the direction.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a handrail according to a preferred embodiment of the present invention.

FIG. 2 is a perspective view of the handrail of FIG. 1 as viewed from an opening side.

FIG. 3 is a plan view of the canvas of the present invention.

FIG. 4 is a cross-sectional view showing one form of a conventional handrail.

FIG. 5 is a perspective view of the handrail of FIG. 4 as viewed from an opening side.

FIG. 6 is a plan view of a conventional canvas.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Handrail 2 Core 2a Canvas 3 Decorative rubber 11 Warp thread (lengthwise thread) 12 Weft thread (widthwise thread)

Continued on the front page (72) Inventor Kojiro Yuki 3-1-1, Sukekawa-cho, Hitachi-shi, Ibaraki Hitachi Cable Co., Ltd. (72) Inventor Shuichi Hashimoto 3-1-1, Sukekawa-cho, Hitachi-shi, Ibaraki Hitachi Inside the cable plant of Electric Wire Co., Ltd. (72) Koichi Saito 3-1-1, Sukekawacho, Hitachi City, Ibaraki Prefecture Inside the cable plant of Hitachi Cable Co., Ltd. (72) Tomohiro Koike 3-1-1, Sukegawacho, Hitachi City, Ibaraki Prefecture No. F-term in Hitachi Cable, Ltd. Wire Plant 3F321 AA10 CF02

Claims (2)

[Claims] 1. A cross section having a substantially cross section C formed by laminating a plurality of canvases.
In a handrail in which decorative rubber is superimposed on the back of a U-shaped core, the thickness of the yarn in the width direction forming the canvas is
A handrail having a thickness equal to or greater than a thickness of a yarn in a length direction forming the canvas. 2. The handrail according to claim 1, wherein the width direction yarn and the length direction yarn are formed of nylon fibers.