JP2005219838A - Passenger conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent riding quality from becoming worse due to mechanical multilateral movement of a footstep chain even when miniaturizing a truss and achieving high operation speed. <P>SOLUTION: This passenger conveyor is provided with a displacement limiting means composed of a stopper 21 for regulating displacement of a following device 9 supporting a following wheel 7 as a chain guide means provided in a folding-back part on the opposite side to a driving wheel so as to displace in the direction in which the following wheel 7 is separated from and approaches the driving wheel to predetermined amount. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to passenger conveyors such as escalators and moving walkways, and in particular, intends to propose a passenger conveyor that can improve the riding comfort of the user.

  FIG. 4 is a schematic diagram showing passenger conveyors such as escalators and moving walkways.

  The passenger conveyor 1 includes a plurality of steps 3 provided with step rollers 2. In FIG. 4, only one of the steps 3 is representatively shown. In these steps 3, step rollers 2 are connected at a predetermined pitch by an endless step chain 4, and the step chain 4 is driven by being wound around a driving wheel 6 to which power is transmitted from a driving device 5. A driven wheel 7 as a chain guide means for guiding the movement of the step chain 4 is provided at the turning portion of the step opposite to the drive wheel 6. The driven wheel 7 rotates following the driving wheel 6 and feeds the step chain 4 in cooperation with the driving wheel 6. Further, the step roller 2 is supported and guided by the guide rail 8 between the driving wheel 6 and the driven wheel 7 and circulates between the forward path and the backward path.

  The driven wheel 7 is supported by a driven device 9 configured to be displaceable in a direction away from or approaching the driving wheel 6. That is, the illustrated driven device 9 includes a bearing 10 that rotatably supports the driven wheel 7 and a carriage 11 that fixes the bearing 10, and the carriage 11 is movable on a rail (not shown). A chain tensioning device 12 is connected and fixed to the driven device 9. That is, the illustrated chain tensioning device 12 includes a rod 13 fixed to the carriage 11 and a tensioner spring 15 provided to receive tension by a vertical beam 14a of a truss 14 that supports the weight of the passenger conveyor 1 and the load of the passenger. The carriage 11 is pulled by the tensioner spring 15 via the rod 13, thereby applying an appropriate tension to the step chain 4.

When a passenger conveyor having such a configuration is operated, the steps wound around the sprockets of the driving wheel 6 and the driven wheel 7 as the driving wheel 6 and the driven wheel 7 to which power is transmitted from the driving device 5 are rotated. Due to the multilateral movement of the chain 4, the distance between the axes of the drive wheel 6 and the driven wheel 7 is changed from L ₁ (distance between A and A) shown in FIG. 4A to FIG. 4B. It changes periodically up to the indicated L ₂ (A-B distance).

  The periodic change in the distance between the axes due to the multi-dimensional movement of the step chain, and the back and forth movement of the follower generated by this change in the tension of the step chain due to the influence of its inertia. It becomes a periodic vibration and affects riding comfort.

  In recent years, it has been desired to save the space for installing the passenger conveyor. For this reason, attempts have been made to thin the truss of the passenger conveyor. In order to reduce the thickness of the truss as described above, it is necessary to use a sprocket having a smaller diameter than conventional ones for the driving wheel and the driven wheel housed in the truss. However, when a small-diameter drive sprocket is used for the chain drive mechanism, the variation in the inter-axis distance between the drive wheel and the driven wheel is further increased due to the mechanical polygonal movement of the step chain. The effect of increases.

  Conventionally, the driving speed of a general passenger conveyor was 30 m / min or less, but due to a revision of the Building Standards Act, escalators with a slope of 30 ° or less are 45 m / min or less, and moving walks with 8 ° or less are 50 m. It became possible to operate at high speed at / min or less. Along with this, when the operation speed of the passenger conveyor is increased, the speed of the back and forth movement of the driven device is also increased. Therefore, the influence of inertia due to the longitudinal movement of the driven device increases.

  As described above, when the influence of the inertia due to the longitudinal movement of the driven device increases, the driven device is displaced by the mechanical polygonal movement of the step chain due to the looseness of the step chain or the deflection of the step roller (X in FIG. 4). ) Over and over, causing a great adverse effect on the riding comfort on the steps. This problem also occurs when a substantially U-shaped movable rail is used as the chain guiding means instead of the driven wheel.

  With respect to an escalator that suppresses periodic vibrations accompanying the movement of the step and has a good riding comfort, Patent Document 1 discloses providing a damper device that suppresses horizontal movement of the driven wheel.

However, the technique disclosed in Patent Document 1 described above is intended to suppress the horizontal movement of the driven wheel itself, and the influence of inertia due to the longitudinal movement of the driven device, which is a problem in the present invention, is increased. In this case, the follower device is not restrained from moving back and forth beyond the amount of displacement due to the mechanical polygonal movement of the step chain. Therefore, when trying to reduce the thickness of the truss and increase the operating speed, a sufficient effect has not always been obtained.
JP-A-7-61755

  The present invention advantageously solves the above-mentioned problems, and restricts the longitudinal movement of the driven device so as not to exceed the displacement amount due to the mechanical polygonal motion, thereby providing a passenger comfort with good riding comfort. The purpose is to provide.

  The present invention includes a plurality of steps, a step chain that connects the steps endlessly, a drive wheel that wraps and drives the step chain, a drive device that transmits power to the drive wheel, and the step chain. Chain guide means for guiding the movement, a driven device that supports the chain guide means so as to be displaceable in the direction of separating from the driving wheel, and urging the chain guiding means in the direction of separating from the driving wheel to A passenger conveyor comprising: a chain tensioning device that applies tension to a step chain; and a displacement limiting unit that restricts the displacement of the driven device to a predetermined amount.

  Since the passenger conveyor according to the present invention is provided with the displacement limiting means for restricting the displacement of the driven device to a predetermined amount, even if the influence of the inertia due to the longitudinal movement of the driven device increases, the displacement amount of the driven device is The displacement due to the mechanical polygonal movement is not exceeded. Therefore, riding comfort on the step can be improved. Further, even if the truss is downsized and the driving speed is increased, the increase in vibration can be suppressed and the riding comfort is not adversely affected.

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

  FIG. 1 is a detailed view of the vicinity of a driven device of a passenger conveyor showing a first embodiment of the present invention. In FIG. 1, the same members as those of the passenger conveyor described above with reference to FIG.

  The passenger conveyor 1 includes a plurality of steps 3 provided with step rollers 2. In these steps 3, step rollers 2 are connected at a predetermined pitch by an endless step chain 4, and the step chain 4 is driven by being wound around a driving wheel 6 to which power is transmitted from a driving device 5. A driven wheel 7 as a chain guide means for guiding the movement of the step chain 4 is provided at the turning portion of the step opposite to the drive wheel 6. The driven wheel 7 rotates following the driving wheel 6 and feeds the step chain 4 in cooperation with the driving wheel 6. Further, the step roller 2 is supported and guided by the guide rail 8 between the driving wheel 6 and the driven wheel 7 and circulates between the forward path and the backward path.

  The driven wheel 7 is supported by a driven device 9 configured to be displaceable in a direction away from or approaching the driving wheel 6. That is, the illustrated driven device 9 includes a bearing 10 that rotatably supports the driven wheel 7 and a carriage 11 that fixes the bearing 10, and the carriage 11 is movable on a rail (not shown). A chain tensioning device 12 is connected and fixed to the driven device 9. That is, the illustrated chain tensioning device 12 includes a rod 13 fixed to the carriage 11 and a tensioner spring 15 provided to receive tension by a vertical beam 14a of a truss 14 that supports the weight of the passenger conveyor 1 and the load of the passenger. The carriage 11 is pulled by the tensioner spring 15 via the rod 13, thereby applying an appropriate tension to the step chain 4.

  In the first embodiment shown in FIG. 1, a displacement limiting means for restricting the displacement of the driven device 9 to a predetermined amount is provided.

  That is, the displacement limiting means in FIG. 1 is a stopper 21 provided at a predetermined interval with respect to the driven device 9. The stopper 21 is made of a rigid body (for example, a metal material), and is attached to the angle member 22 at the same height as the carriage 11 constituting the driven device 9 at a position on the drive wheel side as viewed from the driven wheel 7. Yes. The angle member 22 is fixedly attached to the truss 14. Further, the stopper 21 is attached to the angle member 22 so as to be movable in the left-right direction in the figure, and the position can be adjusted in the same direction by loosening the adjustment bolt 23.

The stopper 21 and the driven device 9 are separated according to the displacement amount of the distance between the driving wheel 6 and the driven wheel 7 in the chain driving mechanism constituted by the driving wheel 6, the driven wheel 7 and the step chain 4. The More specifically, in the chain drive mechanism, the position of the driven wheel 7 is changed as shown in FIG. 1A due to the mechanical multi-directional movement of the step chain 4 as the chain guides and moves in the drive wheel 6 or the driven wheel 7. The position fluctuates periodically from position A to position B shown in FIG. This displacement amount X is also a displacement amount (difference between L ₁ and L ₂ ) of the inter-axis distance between the driving wheel 6 and the driven wheel 7. Thus, in the first embodiment, the distance between the stopper 21 and the driven device 9 is set to the same amount as the above-described displacement amount X as shown in FIG. This is a limitation.

  The distance between the stopper 21 and the driven device 9 can be adjusted by an adjusting bolt 23 that attaches the stopper 21 to the angle member 22. By providing the adjusting bolt 23, the distance can be easily adjusted even when the step chain is elongated.

  When the passenger conveyor 1 according to the first embodiment having the above-described configuration is operated, a mechanical polygonal motion is periodically generated in the chain drive mechanism including the step chain 4, the drive wheel 6, and the driven wheel 7. The device 9 moves back and forth. The longitudinal movement of the driven device 9 is not displaced to the driven side from the position A because the step chain 4 is a rigid body, and is not displaced from the position B to the driving side by the stopper 21.

  Therefore, even if the sprocket diameters of the driving wheel and driven wheel are reduced or the driving speed is increased, the driven device does not move back and forth more than necessary, thereby improving the riding comfort on the step. Can be prevented.

  Next, a second embodiment will be described with reference to FIG.

  FIG. 2 is a detailed view of the vicinity of a driven device for a passenger conveyor showing a second embodiment of the present invention. In FIG. 2, the same members as those in FIGS. 1 and 4 are denoted by the same reference numerals, and the description of the same components is omitted.

  In the second embodiment, the displacement limiting means is an anti-vibration stopper 24. The anti-vibration stopper 24 includes a cylindrical stopper body 24a made of an elastic body (for example, a rubber material), and a washer 24b disposed at one end thereof. The anti-vibration stopper 24 is attached to a base material 25 attached and fixed to the truss 14 on the machine room side when viewed from the driven wheel 7. The anti-vibration stopper 24 extends through the rod 13 fixed to the carriage 11. A contact plate 26 is attached and fixed to the tip of the rod 13 that has passed through the vibration-proof stopper 24 by an adjustment nut 27 so that the position on the rod can be adjusted.

  The contact plate 26 and the vibration proof stopper 24 are used to adjust the displacement amount X of the distance between the driving wheel 6 and the driven wheel 7 in the chain driving mechanism constituted by the driving wheel 6, the driven wheel 7 and the step chain 4. Separated together. That is, as shown in FIG. 2A, the distance between the stopper abutting plate 26 and the vibration proof stopper 24 is set to be the same as or slightly smaller than the displacement amount X described above, so that the driven device 9 is excessively large. Limit displacement. In addition, the distance can be set not only to the same amount as the displacement amount X but also to a slightly smaller amount because the anti-vibration stopper 24 is an elastic body and is elastically deformed so that the displacement amount X and This is because the same amount of displacement can be obtained. The distance between the stopper abutment plate 26 and the vibration proof stopper 24 is set to be slightly smaller than the displacement amount X, and the elastic body is elastically deformed according to the displacement of the driven device, so that this elastic body also serves as a damper. be able to.

  When the passenger conveyor 1 of the second embodiment having the above-described configuration is operated, the longitudinal movement of the driven device 9 is not displaced to the driven side from the position A because the step chain 4 is a rigid body. As shown in FIG. 2B, the contact plate 26 is not displaced to the driving side from the position B because it abuts against the vibration proof stopper 24. Therefore, the same effect as the first embodiment can be obtained.

  In addition, in the second embodiment, the stopper can be easily attached and adjusted in the machine room by setting the stopper attachment position on the machine room side of the passenger conveyor. Furthermore, since there is a sufficient space for attaching the stopper, when selecting the stopper, it is possible to select and use various hardnesses, shapes, spring coefficients, and materials that meet the usage conditions. Therefore, it is possible to suppress a collision sound when the stopper and the contact plate come into contact with each other, and to absorb vibration due to the back and forth movement of the driven device.

  In addition, although not shown in FIG. 2, by configuring the anti-vibration stopper in an elastically deformed state in advance, the stopper can be made harder and the amount of elastic deformation can be adjusted. Needless to say, it is possible to adjust the hardness of the stopper, and these can provide further effects.

  Next, a third embodiment will be described with reference to FIG.

  FIG. 3 is a detailed view of the vicinity of the driven device for the passenger conveyor showing the third embodiment of the present invention. The same members as those in FIGS. 1, 2 and 4 are denoted by the same reference numerals, and the description of the same components is omitted.

  In the third embodiment, the chain guide means for guiding the movement of the step chain 4 is a movable rail 31 formed in a substantially U shape in place of the driven wheel, and between the drive wheel 6 and the movable rail 31. The step chain 4 is stretched over the door. In the movable rail 31, a portion around which the step chain 4 is stretched is a circular portion having substantially the same diameter as the drive wheel 6. Each step roller 2 connected by a step chain 4 is brought into contact with the outer periphery thereof to guide the movement of the step roller. Further, the movable rail 31 is supported by a driven device 9 configured to be displaceable or approached from the driving wheel 6, and a chain tensioning device 12 is connected and fixed to the driven device 9. Appropriate tension is applied to the step chain 4.

  A mountain-shaped bent portion 32 is provided in the vicinity of the circular portion on the moving path of the step roller in the movable rail. The bent portion 32 is for suppressing the unevenness of the speed of the step roller to suppress the vibration of the step. The uneven speed of the step roller is a process in which the step roller 2 connected by the step chain 4 and linearly moves along the guide rail 8 is switched to a circular motion following the drive wheel 6, the driven wheel 7 or the movable rail 31. In this case, the moving speed is uneven due to the influence of, for example, being caught in the sprocket of the drive wheel 6.

  In order to suppress the uneven speed of the step rollers, the crest-shaped or trough-shaped bent portion is placed in the vicinity of the circular portion of the movable rail 31 as shown in FIG. If provided, of the step rollers 2 connected by the step chain 4, a certain step roller 2 moves along the curved shape of the bent portion 32, and its height position changes, so that the step roller 2 precedes the step roller 2. As a result, the uneven speed is absorbed by the change in the height position, and the uneven speed is not transmitted to the succeeding step roller 2, and the moving speed of the succeeding step roller 2 is maintained at the average speed. The uneven speed of the step roller is suppressed, and the vibration of the step is suppressed. Such a technique is disclosed in, for example, Japanese Patent Application Laid-Open No. 2003-252560.

  In the third embodiment, the displacement limiting means is a pair of anti-vibration stoppers 24. The anti-vibration stopper 24 includes a cylindrical stopper body 24a made of an elastic body (for example, a rubber material), and a washer 24b disposed at one end thereof. These anti-vibration stoppers 24 are respectively attached to both surfaces of a base material 25 attached and fixed to the truss 14 on the machine room side when viewed from the driven wheel 7. The anti-vibration stopper 24 extends through the rod 13 fixed to the carriage 11. The two abutting plates 26 provided on the rod 13 penetrating the anti-vibration stoppers 24 are in contact with the base member 25 so as to sandwich the pair of anti-vibration stoppers 24 from both sides by the adjusting nut 27. The position on the rod is adjustable and fixed.

  Of these configurations, in particular, when the bending portion 32 is provided on the movable rail 31 as the chain guide means so as to have a theoretical shape that eliminates the speed unevenness of the step roller 2, the speed unevenness and the back-and-forth movement of the driven device 9 are theoretical. Should be gone.

  However, in order to realize a configuration that theoretically eliminates such back and forth motion, in order to make the movement trajectory of the step roller 2 as the theoretical value for the guide rail 8, the bent portion 32, the drive wheel 6, and the movable rail 31, It is required to form and install with high accuracy. If there is an error from the theoretical value when installed, the driven device will move back and forth, causing vibration on the step.

  In addition, even when dust or the like adheres to the guide rail 8 or a step or the like is generated at the connecting portion of the guide rail 8, the back-and-forth movement of the driven device occurs and vibration on the step occurs. .

  Therefore, in the third embodiment, even when the follower is moved back and forth due to the above-described reasons, the vibration isolating stopper 24 of the elastic body attenuates the displacement of the follower by the elastic deformation and the amount of the move back and forth. To regulate.

  Therefore, according to the third embodiment, the same effects as those of the first and second embodiments can be obtained, and the dimensions and the technology in the technology for improving the riding comfort of the step by providing a bent portion in the chain guide means. It is possible to reduce the influence of disturbance such as inadequate mounting accuracy and dust adhesion, and to further improve riding comfort.

  In the first to third embodiments described above, the stopper 21 and the vibration isolating stopper 24 are described using a metal material or a rubber material. However, the present invention does not limit the material of the stopper. Of course, for example, the same effect can be obtained by using a resin material or various dampers (air, hydraulic pressure, friction).

  Moreover, although the figure used for description has shown the sidewalk which moves as a passenger conveyor, this invention can acquire the same effect also in an escalator.

It is detail drawing of the passenger conveyor which shows 1st Embodiment of this invention. It is detail drawing of the passenger conveyor which shows 2nd Embodiment of this invention. It is detail drawing of the passenger conveyor which shows 3rd Embodiment of this invention. It is the schematic which shows a passenger conveyor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Passenger conveyor 2 Step roller 3 Step 4 Step chain 5 Drive device 6 Drive wheel 7 Driven wheel (chain guide means)
8 Guide rail 9 Follower 12 Chain tensioning device 21 Stopper

Claims (5)

Multiple steps,
A step chain for connecting the steps endlessly;
A drive wheel that winds and drives the step chain; and
A drive device for transmitting power to the drive wheels;
Chain guide means for guiding the movement of the step chain;
A driven device that supports the chain guide means so as to be displaceable in a direction approaching and separating from the driving wheel;
A chain tensioning device that applies tension to the step chain by urging the chain guide means away from the drive wheel; and
Displacement limiting means for restricting the displacement of the driven device to a predetermined amount, a passenger conveyor.   The passenger conveyor according to claim 1, wherein the displacement limiting means is a stopper provided apart from the driven device.   3. The passenger conveyor according to claim 2, wherein the stopper is provided so as to be separated from the driven device in accordance with a displacement amount of a distance between the driving wheel and the chain guide means.   The passenger conveyor according to claim 2 or 3, wherein the stopper is configured to be adjustable in position in the same direction as the displacement direction of the driven device.   A bent portion having a shape that suppresses unevenness of the speed of the step roller is provided on a moving path of the step roller in at least one of the chain guide means and the guide rail, and the displacement limiting means is an elastic deformation of the elastic body. The passenger conveyor according to claim 1, wherein the displacement of the driven device is restricted to a predetermined amount.

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