JPH0411470B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a curved escalator having an arcuate conveyance path in a horizontal projection plane, and more specifically,
The present invention relates to a safety device that detects abnormalities in side rollers that support the load toward the center of the circular arc of the step conveyance path.

[Conventional technology]

FIG. 4 shows an outline of a curved escalator, and in the figure, reference numeral 1 denotes the main frame of the curved escalator, which is arranged in an arcuate shape and inclined in a horizontal projection plane. Reference numeral 2 denotes a conveyance path configured in the main frame 1, with an outgoing path 2a on the upper surface side of the main frame 1, a reversing section 2b at the upper end of the main frame 1, an inverting section 2c at the lower end of the main frame 1, and a reversing section 2c at the lower end of the main frame 1. A return path 2d is formed on the bottom side of each of the holes 1 and 2d to form an endless structure. 3 has a fan-shaped plane and a large number of steps are arranged in succession on the conveyance path 2; 4 is an outer skirt guard provided outside the step 3; and 5 is provided inside the step 3. The inner skirt guard 6 is a drive device provided at the upper end of the main frame 1, and is composed of a drive device 6a and a chain gear 6b driven by the drive device 6a. The winding drive is performed at the reversing section 2b. Reference numeral 7 denotes a tension wheel device provided at the lower end of the main frame 1, which is capable of applying tension to the step chain at the reversing section 2c of the conveyance path 2.

Incidentally, in the curved escalator, the step chain wound around the chain gear 6b is arranged in an arc shape, so that when the escalator is driven, the tension is generated in the tangential direction of the arc, and its component force is also generated in the direction of the center of the arc. The centripetal force that acts on each step during running reaches approximately tens to hundreds of kilograms.

For this reason, for example, the specification and drawings of Japanese Patent Application No. 167831/1983, which was the applicant's earlier application (this application was published as Japanese Patent Application Laid-Open No. 60-61491 after this application, so it is now In the curved escalator described in the publication (Japanese Publication No. 2003-111000), a mounting bracket that is rotatably supported around the step shaft is attached to the inner or outer end of the step shaft provided in the width direction of the step 3. This mounting bracket is equipped with a guide roller (side roller) that rolls on the outer peripheral surface of the guide rail (arc-shaped rail), and by supporting the load in the direction of the center of the arc, the influence of the above component force is prevented. At the same time, a pair of drive rollers rotatably supported around an axis parallel to the step axis are arranged on both sides of the guide roller in the mounting bracket, and the posture of the mounting bracket is controlled by these drive rollers. By controlling the stairs, the movement on the stairs on the outward journey is stable and smooth, and the amount of wear on the guide rollers is also reduced.

[Problem that the invention seeks to solve]

As mentioned above, conventional curved escalators prevent the influence of component forces by using side rollers that support the load in the direction of the center of the arc. In this case, there is no means to detect abnormalities in the side rollers, and if the rubber part of the side rollers becomes ring-shaped and falls off or the surface rubber of the rollers is damaged, the above component force may cause There was a problem in that the step shaft moved toward the center of the arc, causing the step 3 to collide with the inner skirt guard 5 and the like, resulting in damage to the escalator.

In view of the above points, it is an object of the present invention to provide a safety device for a curved escalator that can detect damage to the side rollers and prevent accidents.

[Means for solving problems]

In order to achieve the above object, the structure of the safety device for a curved escalator according to the present invention includes a main frame that is arranged in an arc shape and inclined in a horizontal projection plane, and a main frame that is inclined vertically at a constant inclination angle. Upper and lower horizontal sections are provided on both sides of the intermediate inclined section through upper and lower curved sections, and the outgoing section and the return section are connected to the ends of these horizontal sections;
An endless conveyance path with a continuous lower inversion part and an arcuate horizontal projection surface, a large number of fan-shaped steps that circulate through this conveyance path, and a step connected to the step shafts of these steps. A driving inner and outer step chain that can be bent in three dimensions, a mounting bracket that is rotatably supported on the inner or outer end of the step shaft, and a mounting bracket that is perpendicular to the step shaft. A guide roller that is rotatably supported around an axis and receives a radial component of the tension of the step chain, and a pair of guide rollers located on both sides of the guide roller in the mounting bracket that is rotatable around an axis that is parallel to the step axis. For a curved escalator equipped with a drive roller pivotally supported on the main frame and a guide rail fixed to the main frame to support and guide each of the rollers, the step shaft is attached to the main frame side and the step shaft is Abnormality detection means for detecting movement of a predetermined distance C or more in the direction of the center of the arc is provided, and the abnormality detection means is composed of a movable member, a fixed member supporting the movable member, and a switch interlocked with the movable member. At the same time, the movable member is disposed such that, under normal conditions, its tip faces the end face of the inner end of the circular arc of each step shaft across a required length C, and the fixed member and the switch The movable member is disposed in a position that does not intersect with the biased trajectory along which the step shaft passes, which is displaced by a much larger distance C in the direction of the center of the arc when the rubber portion of When engaged with the side surface of the inner tip of the step shaft, it is coupled to the fixed member so that it can be driven to a position that deviates from the biased orbit.

[Effect]

In the present invention, since the abnormality detection means detects the deviation of the step shaft in the direction of the circular arc center when the side roller is abnormal, it is possible to immediately respond to the deviation and prevent accidents.

〔Example〕

Hereinafter, the present invention will be described with reference to an embodiment shown in FIGS. 1 to 3, in which the same parts as in FIG. 4 are denoted by the same reference numerals. In the figure, 8 is a step shaft provided in the width direction of the step 3, 9a, 9a is a pair of outer drive rollers pivotally supported at the outer end of the step shaft 8, and 9b is inside the arc of the step shaft 8. An inner drive roller 10a is pivotally supported at the end, and an outer drive rail (guide rail) 1 is arranged along the conveyance path 2 fixed to the main frame to guide and support the outer drive roller 9a.
0b is an inner drive rail (guide rail) that similarly guides and supports the inner drive roller 9b, 11b is an outer follow-up roller provided on the outer side of the arc at the edge near the bottom of the step 3, and 11b is the roller at the edge near the bottom of the step 3. Inner follow-up roller provided inside the arc,
12a is an outer following rail fixed to the main frame and arranged along the conveyance path 2 to guide the outer following roller 11a, and 12b is an inner following roller 11b.
13a is an outer step chain disposed along the conveyance path 2 and connects the outer end of the step shaft 8, and 13b is an inner step chain that similarly connects the inner end of the step shaft 8. A chain 14 is a step 3 attached to the arcuate outer end of the step shaft 8 via a bracket 14a at right angles to the outer drive roller 9a.
It is a side roller (guide roller) that supports the load in the direction of the circular arc center of the transport path 2, and is guided and supported by the circular arc outer surface of the outer drive rail 10a, that is, the circular arc outer peripheral surface of the outer drive rail.

Reference numeral 15 denotes an abnormality detection mechanism attached to the inner arcuate surface of the inner drive rail 10b, which includes an L-shaped bracket 17 whose one side is fixed to the inner drive rail 10b with a bolt 16, and the other parts of the bracket 17. A pin, that is, a support shaft 18 that penetrates and is pivotally attached to the side horizontal surface portion 17a and extends vertically, and this pin 1
8, the operating lever 19 is fixed to the upper end of the step shaft 8, and the tip thereof faces the arcuate inner end surface of the step shaft 8 when it is normal, with a slight gap C therebetween, and a V-shaped notch groove 20a in the peripheral edge.
an engaging portion 20 consisting of a disk fixed to the lower end of the pin 18; and an actuating portion 21a attached to the lower surface of the tip of the horizontal surface portion 17a of the bracket 17, which fits into the notch groove 20a of the disk 20. It is composed of a switch 21 that operates. Above operating lever 1
The gap C between the step shaft 8 and the step shaft 8 may be set freely as long as it is within the range of movement of the step shaft 8 that is assumed to occur in the event of an abnormality of the side roller 14, but it should be set to an extent that does not affect normal operation. There is a need.

In the safety device for a curved escalator of the present invention constructed as described above, when the side rollers 14 are in a normal state, when the drive device 6 is energized, the chain gear 6b rotates (see Fig. 4). ), step chain 13a,
Step 3 is driven via 13b. In the step 3, each drive roller 9a, 9b is connected to each drive rail 1.
0a, 10b, and each following roller 11a, 11
b are guided by the following rails 12a, 12a, and the side rollers 14 are guided and rolled by the arcuate outer peripheral surface of the drive rail 10a, and are circulated in the conveyance path 2. At this time, the load generated on the step 3 in the direction of the center of the circular arc of the conveyance path 2 is supported by the side rollers 14 and the drive rail 10a that guides them. A gap C is maintained between the operating lever 19 of the abnormality detection mechanism 15 and the step shaft 8, and the safety device does not operate.

However, if the surface rubber of the side rollers 14 is damaged, the step shaft 8 is displaced toward the center of the arc by an amount larger than the gap C due to the arc center component force of the step chain. If the rubber portion of the side roller 14 were to become ring-shaped and fall off, the step shaft 8 would be displaced toward the center of the arc by a much larger amount of movement than the gap length C. . In either case, when the stepped shaft 8 reaches the installation position of the abnormality detection mechanism 15, the inner end of the arc of the step shaft 8 engages with the operating lever 19.
is rotated around pin 18. This rotation of the operating lever 19 is simultaneously caused by the rotation of the disc 20 via the pin 18.
is rotated to operate the switch 21 whose actuating portion 21a is fitted into the cutout groove 20a of the disc 20. This may activate an external alarm device or may stop the curved escalator.
During this time, even if the step shaft makes the maximum positional movement toward the center of the arc (much larger positional movement than the predetermined distance C) due to the rubber part of the guide roller (side roller) falling off, etc., the bracket 17 The switch 21 is also far away from the step shaft deflection trajectory caused by the largest positional movement, so it may be collided with or destroyed by the side surface of the inner tip of the step shaft, thereby causing damage to the normal operation. There is no risk of signal generation, and it is completely safe both structurally and functionally.

In the above embodiment, the switch 21 is operated via the operating lever 19, etc., but a movable member other than the operating lever may be used instead of the operating lever 19, and the present invention Various changes can be made within the scope of the technical concept.

〔Effect of the invention〕

As described above, the safety device for a curved escalator according to the present invention has a main frame which is arranged in an arc shape and inclined in a horizontal projection plane, and an intermediate inclined section which is inclined vertically at a constant angle of inclination. Upper and lower horizontal sections are provided through the upper and lower curved portions where the inclination angle changes, and the outbound and return routes are connected to the ends of these horizontal sections,
An endless conveyance path with a continuous lower inversion part and an arcuate horizontal projection surface, a large number of fan-shaped steps that circulate through this conveyance path, and a step connected to the step shafts of these steps. A driving inner and outer step chain that can be bent in three dimensions, a mounting bracket that is rotatably supported on the inner or outer end of the step shaft, and a mounting bracket that is perpendicular to the step shaft. A guide roller that is rotatably supported around an axis and receives a radial component of the tension of the step chain, and a pair of guide rollers located on both sides of the guide roller in the mounting bracket that is rotatable around an axis that is parallel to the step axis. For a curved escalator equipped with a drive roller pivotally supported on the main frame and a guide rail fixed to the main frame to support and guide each of the rollers, the step shaft is attached to the main frame side and the step shaft is Abnormality detection means is provided to detect movement of a predetermined distance C or more in the direction of the center of the arc, and this abnormality detection means is composed of a movable member, a fixed member that supports the movable member, and a switch that is interlocked with the movable member. At the same time, the movable member is disposed such that, under normal conditions, its tip faces the end face of the inner end of the circular arc of each step shaft across a required length C, and the fixed member and the switch The movable member is disposed in a position that does not intersect with the biased trajectory along which the step shaft passes, which is displaced by a much larger distance C in the direction of the center of the arc when the rubber portion of Since it is constructed by being connected to the above-mentioned fixed member so that it can be driven to a position that deviates from the above-mentioned biased trajectory even when it engages with the side surface of the inner tip of the step shaft, it is approximately as follows. It can be effective.

Even if the amount of positional movement of the step shaft in the direction of the arc center is slightly larger than the gap C, or even if it is much larger, this can be detected safely and reliably. Furthermore, the danger limit due to damage to the guide rollers (side rollers) can be determined extremely accurately.

The fixing member and switch of the abnormality detection means are
When the rubber part of the guide roller falls off, it may be mowed down and destroyed by the side surface of the inner tip of the step shaft, which is displaced far more than the gap C in the direction of the center of the arc, and this may generate a false normal signal. There is no risk of damage, and it is completely safe both structurally and functionally.

As described above, various accidents of the curved escalator caused by failure of the guide rollers (side rollers) can be prevented in advance and reliably.

The structure of the abnormality detection means is simple and short, and therefore it can be easily installed even in a narrow space on the inner circumferential side of the arc of the inner drive rail (guide rail).

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the present invention, and FIG.
The figure is a sectional view taken along the - line in Fig. 1, Fig. 3 is an enlarged bottom view showing the main parts of the present invention as seen from the - line direction in Fig. 2, and Fig. 4 shows an outline of the curved escalator. It is a front view. 1...Main frame, 2...Transport path, 2a...Outward path, 2
b, 2c... Reversing part, 2d... Return path, 3... Step, 8... Step shaft, 9a... Outer drive roller, 9
b...Inner drive roller, 10a...Outer drive rail (guide rail), 10b...Inner drive rail (guide rail), 13a...Outer step chain, 13b
...Inner step chain, 14...Side roller (guide roller), 14a...Bracket (mounting metal fitting), 15
... Abnormality detection mechanism, 19 ... Actuation lever, 21 ...
...Switch. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A main frame having an arcuate shape and being inclined in a horizontal projection plane, and an intermediate inclined section which is inclined vertically at a constant angle of inclination, and upper and lower sections whose inclination angles change on both sides. Endless conveyance in which upper and lower horizontal sections are provided through a curved section, the outgoing section and the return section are connected to the ends of these horizontal sections, the upper and lower inverted sections are continuous, and the horizontal projection plane is arcuate. a large number of fan-shaped steps that circulate through this conveyance path, three-dimensionally bendable inner and outer step chains that are connected to the step shafts of these steps and drive the steps, and A mounting bracket is rotatably supported on the outer end of the step around the step axis, and a radial component of the tension of the step chain is supported on the mounting bracket so as to be rotatable around an axis perpendicular to the step axis. a guide roller that receives the guide roller; a drive roller that is rotatably supported around an axis parallel to the step axis in pairs on both sides of the guide roller in the mounting bracket; and a drive roller that is fixed to the main frame and that drives each of the rollers. a guide rail that supports and guides; and an abnormality detection means that is attached to the main frame side and detects that the step shaft has moved in the direction of the arc center by a predetermined distance C or more; , a fixed member that supports this movable member, and a switch that interlocks with the movable member, and in normal operation, the tip of the movable member is connected to the end surface of the inner end of the arc of each step shaft for a required distance. The fixing member and the switch are arranged so as to face each other via C, and the fixing member and the switch move a predetermined distance C in the direction of the center of the arc when the rubber portion of the guide roller falls off.
When the movable member is disposed at a position that does not intersect with the biased track through which the step shaft whose position is displaced to a much greater extent than that of for,
A safety device for a curved escalator, which is coupled to the fixed member so as to be able to follow the escalator to a position that deviates from the biased track.