JPS636136Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Technical Field of the Invention] This invention relates to a handrail (also referred to as a moving handrail) that is provided on the railing of an escalator and is driven to rotate in synchronization with the steps. [Technical background of the invention and its problems] Generally, as shown in Figure 2, an escalator has steps 1 arranged in an endless manner between the upper and lower floor entrances, and the outer periphery of the railings 2 on both the left and right sides. Passengers are transported by mutually synchronizing and rotating the endless handrails 3 arranged in the same direction. The handrail 3 of such an escalator is generally arranged between a plurality of drive rollers 4 provided on the return path of the handrail in the lower part of the balustrade 2 and a pressure roller 5 arranged to roll under each of the drive rollers 4. is passed through the rollers 4 and 5 as shown in FIG. 3, and is driven by the frictional force generated by the rotation of the drive roller 4. 3 is guided by a plurality of guide rollers 6 on the inner return side of the lower part of the balustrade 2, and is guided along the semicircular arc outer circumferential surface at the semicircular arc-shaped inverted part (newal part) 7 at the upper and lower floor side ends of the balustrade 2. It is guided by a large number of small-diameter rollers 8 arranged in a row, and is further guided by a guide rail 10 attached to a balustrade frame 9 at the upper part of the balustrade 2, so that it rotates endlessly. In addition,
The small-diameter roller 8 of the balustrade reversing section 7 rolls into contact with the center of the inner circumferential surface of the handrail 3 as shown in FIG. By having the recessed part 10a for mounting, the convex parts 10b on both sides,
10b is adapted to come into sliding contact with the inner circumferential surface of the handrail 3. As shown in FIG. 6, the handrail 3 itself has a substantially C-shaped cross section with both sides facing each other in the width direction, and the outer layer is made of decorative rubber 12 and the inner layer is made of a plurality of layers. Laminated cotton canvas 1
It consists of 3... By the way, the handrail 3 of the escalator described above is guided from the inner peripheral side by a large number of small diameter rollers 8 at the reversing part 7 of the handrail 2 and moves in reverse, but at this time, the unevenness according to the arrangement of each small diameter roller 8 is formed. There is a problem that the handrail 3 has a defect that appears on the outer circumferential surface and deteriorates the design, and the handrail 3 itself is bent in multiple directions, resulting in a shortened service life. Therefore, as a countermeasure, a guide rail similar to the guide rail 10 on the upper part of the balustrade is provided in place of the small diameter roller 8 in the balustrade reversing part 7, and the handrail 3 is continuously guided in sliding contact with the handrail 3. It has become possible to eliminate the occurrence of unevenness and polygonal bending. However, in such a case, the frictional resistance, that is, the running resistance of the handrail 3 at the balustrade inversion section 7 increases, and a large driving force is required to move the handrail 3.
There was a problem that the service life was shortened due to wear. In other words, the balustrade reversing section 7 using the conventional small diameter roller 8
The running resistance of the handrail 3 at
The coefficient of friction between the handrail 3 and The coefficient of friction between the handrail 3 and the guide rail 10 that slides on the inner peripheral side surface increases, and the friction further increases the running resistance of the handrail 3 exponentially. For example, if the wrapping angle of the handrail 3 at the balustrade inversion part 7 is 180 degrees (π radian) and the friction coefficient between them is μ = 0.3, then the running resistance is e〓〓＝e ^0.3× 〓＝ from Euler's formula. 2.5 times, the driving force of the handrail 3 increases accordingly, and there is a problem that the handrail 3 is severely worn and its life is shortened. [Purpose of the invention] This invention was created in view of the above circumstances, and in order to eliminate unevenness and multi-angled bending as in the past, even when guide rails are provided in place of small diameter rollers at the reversing part of the balustrade, There is almost no increase in frictional resistance at the reversing part, and the driving force due to the friction between the drive roller and the drive roller can be secured as before, and smooth rotational movement is now possible. The object of the present invention is to provide a highly practical escalator handrail that has increased driving force and a longer service life. [Summary of the invention] The escalator handrail of this invention is a handrail in which the outer layer is made of decorative rubber and the inner layer is made of canvas, and the center of the surface of the inner layer is in contact with the drive roller. The section is made of a canvas as it is, that is, a canvas with a large coefficient of friction, and the both sides, that is, the surface on which the guide rail slides, are made of a resin-treated canvas with a small coefficient of friction, which is obtained by impregnating the canvas with a phenolic resin. . [Embodiment of the invention] An embodiment of the invention will be described below with reference to FIG. 3A in the figure is a handrail of the present invention, which has a cross-sectional shape that is approximately the same as the conventional handrail 3 shown in FIG.
A decorative rubber 22 made of Hypalon rubber or the like similar to conventional rubber is used as the outer layer, and a plurality of cotton canvases 2 are used as the inner layer.
3, 24, 25, and 26 are laminated, each layer is adhered with rubber glue, and each layer is integrally pressurized and vulcanized.
More specifically, three sheets of cotton canvas 23, 24, 2 are laminated in order on the inner circumferential side of the decorative rubber 22 of the outer circumferential layer.
5 are wide ones and are polymerized on the inner periphery of the decorative rubber 22 over the entire width thereof, and the remaining cotton canvas 26 is narrow and covers the surface of the innermost layer of cotton canvas 25. They are overlapped at the center (range H where the drive roller 4 rolls). Here, the two cotton canvases 23 and 24 that are not exposed at all on the inner circumferential side and the narrow cotton canvas 26 arranged in the center of the inner circumferential layer surface are the same cotton canvases that have a large friction coefficient as before. ing. In addition, the cotton canvas 25 exposed on both sides of the inner layer surface excluding the central part is made of a conventional cotton canvas impregnated with a phenolic resin to create a resin-treated cotton canvas with a small coefficient of friction. ing. In other words, the impregnating phenolic resin is, for example,
It is abbreviated as RFL resin, and it is a resorcinol aqueous solution.

[Effect of idea]

Since this idea was made as described above, even if a guide rail is provided in place of a small diameter roller at the reversing part of the balustrade, there is almost no increase in frictional resistance at the reversing part, and moreover, the driving force due to the friction between it and the drive roller. This is an escalator handrail that can be secured in the same manner as before, can rotate smoothly, has an excellent design, has a small driving force, has a long life, and has great practicality.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a handrail showing an embodiment of this invention, Figure 2 is a schematic diagram of the upper floor side of a general escalator, and Figure 3 is a sectional view taken along the - line in Figure 2. , FIG. 4 is a sectional view taken along the - line in FIG. 2, FIG. 5 is a sectional view taken along the - line, and FIG. 6 is a sectional view of a conventional handrail. 1... Steps, 2... Balustrade, 3, 3A... Handrail, 4... Drive roller, 5... Pressure roller,
6... Anai roller, 7... Balustrade inversion part, 8...
Small diameter roller, 9... Balustrade frame, 10... Guide rail, 10a... Concave portion, 10b... Convex portion,
11... Mounting bolt, 12, 22... Decorative rubber,
13, 23, 24, 26...cotton canvas, 25...resin-treated cotton canvas.

Claims (1)

[Scope of utility model registration request] It has an endless strip shape that moves while being guided in sliding contact with the guide rail on the outer periphery of the escalator balustrade, driven by the rotational friction force of the drive roller on the way back to the handrail in the lower part of the balustrade, and the outer periphery side layer is made of decorative rubber and the inner periphery is In an escalator handrail whose side layer is made of canvas, the central part of the surface of the inner layer that contacts the drive roller is made of canvas with a high coefficient of friction, and both sides are made of resin with a small coefficient of friction impregnated with phenolic resin. An escalator handrail characterized by being constructed of treated canvas.