JP5814020B2 - Abnormality detection device for passenger conveyor - Google Patents

Description

  The present embodiment relates to a passenger conveyor abnormality detection device.

  Passenger conveyors such as moving walkways and escalators are provided with a plurality of steps on which passengers ride and an endless step chain to which these steps are connected. The step chain is spanned between a drive sprocket and a driven sprocket provided at the folded portion, and the drive chain is transmitted to the drive sprocket from the drive device, so that the step chain is connected to one entrance / exit and the other. Cycle between the gates. A guide rail is provided between the pair of entrances and exits along the path of the step that circulates with the step chain, and the rollers provided on the step engage with the guide rail and roll. Thus, the step is guided by the guide rail and moves between one of the entrances and the other entrance.

  If the connection of the step to the step chain is insufficient, or if the bolt that connects the step to the step chain is removed for some reason, such as life or external factors, the chain will be Since there is a possibility of dropping off, conventionally, an abnormality detecting device that detects the dropping of a step has been proposed (for example, see Patent Documents 1 and 2 below).

JP-A-8-91755 JP 2008-222354 A

  However, the abnormality detection device as described above can detect the drop of a step when the step is forgotten to be fixed to the step chain or when the step is removed from the guide rail, but before the step is completely removed from the step chain. There is a problem that an abnormality cannot be detected when the connection of the step to the step chain is loose.

  The present invention has been made in consideration of the above-described problems, and an object of the present invention is to provide a passenger conveyor abnormality detection device capable of early detection of a step connection abnormality to a step chain.

An embodiment of the present invention includes an endless step chain that is circulated between a pair of sprockets, a plurality of rollers provided at predetermined intervals provided in the step chain, and a step chain. In an abnormality detection device for a passenger conveyor, comprising a plurality of connected steps and a guide rail arranged along a circulation movement direction of the step chain and guiding each roller, the step chain is stretched over the step chain A detection piece including a circular arc portion provided at a distance in a radially outward direction from the outer peripheral portion of the sprocket and along the outer periphery of the sprocket, and a protrusion protruding toward the sprocket from the inner surface side of the circular arc portion When the said roller is disengaged from the sprocket, the rollers this off is brought into contact with the projection, in a direction away from the outer periphery of the sprocket When the piece is moved, a switch for detecting the detection piece, said switch passenger conveyor, characterized in that it comprises, an abnormality detecting device for stopping the operation of the passenger conveyor when detecting the detection piece An anomaly detection device.

It is a side view of a passenger conveyor to which an abnormality detection device according to an embodiment of the present invention is applied. It is a principal part enlarged view of the drive sprocket vicinity of the passenger conveyor shown in FIG. It is AA sectional drawing of FIG. It is a principal part enlarged view of the drive sprocket vicinity of the passenger conveyor shown in FIG. 1, Comprising: It is a figure which shows the state in which the step dropped from the step chain.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  A passenger conveyor 1 illustrated in FIG. 1 is an inclined moving sidewalk to which a passenger conveyor abnormality detection device (hereinafter referred to as an abnormality detection device) 30 according to an embodiment of the present invention is applied. In a moving sidewalk, it is common for multiple steps to move horizontally or gently in an inclined direction. Therefore, the steps may be specifically referred to as “treads” or “pallets”. In the case of a moving sidewalk, the following notation is unified as “step”. Moreover, in this embodiment, the step 2 moves from one (for example, the lower floor side) entrance / exit 7 to the other (for example, the upper floor side) entrance 8 and the passenger steps from the lower floor side entrance 7. The case of changing to the tread 2a of 2 and getting off at the entrance 8 on the upper floor side will be described.

  The passenger conveyor 1 includes a plurality of steps 2. An endless step chain 3 is attached to both sides of these steps 2 and arranged in the truss 4.

  The illustrated step chain 3 is an example of a conveyor chain in which the rollers 5 constituting the step chain 3 in combination with a link plate also serve as step rollers provided before and after each step 2.

  On both sides of the step 2, guide rails 6 are disposed along the traveling direction of the step 2, and are fixed to the truss 4 with bolts or the like. The guide rail 6 includes a rolling surface on which the roller 5 provided on the step 2 rolls, and guides the roller 5 along the guide rail 6.

  The guide rail 6 includes an outward guide rail 6a for guiding a roller 5 provided on the step 2 that moves from a lower floor entrance 7 corresponding to the entrance to an upper entrance 8 corresponding to the exit. And return-side guide rails 6b and 6c for guiding the roller 5 provided on the step 2 that moves from the upper floor entrance 8 to the lower floor entrance 7.

  A drive sprocket 9 and a drive device (not shown) that transmits a rotational force to the drive sprocket 9 are disposed on the upper floor side of the truss 4. A driven sprocket 10 is disposed on the lower floor side of the truss 4.

  The step chain 3 is bridged between the drive sprocket 9 and the driven sprocket 10 so that the roller 5 of the step chain 3 meshes with the teeth 9a and 10a provided on the outer peripheral surfaces of both sprockets 9 and 10. Yes.

  Then, when the roller 5 is engaged with the teeth 9a, 10a of the drive sprocket 9 and the driven sprocket 10, the drive sprocket 9 receiving the rotational force from the drive device rotates, so that the roller 5 moves the forward guide rail 6a. It slides from the lower floor side to the upper floor side, engages with the tooth portion 9a of the drive sprocket 9, moves around the outer periphery of the drive sprocket 9, and is transferred to the return path guide rails 6b, 6c. Is slid from the upper floor side to the lower floor side, meshes with the tooth portion 10a of the driven sprocket 10, moves around the outer periphery of the driven sprocket 10, and circulates so as to return to the outward guide rail 6a again. As a result, the step 2 connected to the step chain 3 circulates between the entrance 7 and the entrance 8.

  In the passenger conveyor 1 having such a configuration, an abnormality detection device 30 that detects a step 2 that is loosely connected to the step chain 3 or disconnected from the step chain 3 in the vicinity of the drive sprocket 9 and the driven sprocket 10. Each is provided.

  Since the abnormality detection device 30 provided in the vicinity of the drive sprocket 9 and the driven sprocket 10 has the same structure, the abnormality detection device 30 provided in the vicinity of the drive sprocket 9 will be described below. Description of the abnormality detection device 30 provided in the vicinity of 10 is omitted.

  The abnormality detection devices 30 are provided on the left and right drive sprockets 9 and the left and right driven sprockets 10, respectively, and four are provided for each passenger conveyor 1, but all have the same structure. Hereinafter, the abnormality detection device 30 provided in the vicinity of one drive sprocket 9 will be described, and the description of the other abnormality detection device 30 will be omitted.

  As shown in FIGS. 2 and 3, the abnormality detection device 30 includes a detection piece 32 provided outside the drive sprocket 9 and a switch 34 that detects the movement of the detection piece 32.

  The detection piece 32 includes an arc portion 35 provided in an arc shape along the outer periphery of the drive sprocket 9 with a distance C in the radial direction from the step 2 moving on the outer periphery of the drive sprocket 9, and upward from the arc portion 35. And an extending attachment portion 37.

  The arc portion 35 is provided along a section from the position where the tread surface 2a of the step 2 is perpendicular to the horizontal plane to the position where the step 2 reaches above the return-side guide rails 6b and 6c in the drive sprocket 9. Yes.

  A protrusion 40 that protrudes toward the drive sprocket 9 is provided on the inner surface side of the arc portion 35, that is, the surface facing the outer peripheral surface of the drive sprocket 9, and moves around the protrusion 40 and the outer periphery of the drive sprocket 9. The distance D from the step 2 is smaller than the distance C from the arc portion 35 to the step 2 that moves on the outer periphery of the drive sprocket 9. In the present embodiment, the protrusion 40 is a member formed separately from the detection piece 32 and is fixed to the arc portion 35 of the detection piece 32 with a screw or the like.

  A lower end portion of the arc portion 35 is fixed to the truss 4 via a lower support member 36. The lower support member 36 supports the detection piece 32 in a state where the detection piece 32 is movable in the horizontal direction and in the direction H1 away from the drive sprocket 9.

  The arc portion 35 is provided with an extending portion 35a that extends downward from a position supported by the lower support member 36, and an escape portion 35b that is bent downward at the tip of the extending portion 35a.

  An upper end portion of the attachment portion 37 is fixed to the truss 4 via an upper support member 38. The upper support member 38 is movable in a horizontal direction H1 away from the drive sprocket 9 and is driven in a state where the detection piece 32 is urged in a direction H2 opposite to the horizontal direction H1 by a spring 39. The detection piece 32 is supported at a position that maintains a predetermined distance C with respect to the step 2 that moves on the outer periphery of the sprocket 9.

  The switch 34 is a limit switch that detects the operation of the actuator 34 a that contacts the detection piece 32, and is one direction in the horizontal direction in which the detection piece 32 is separated from the drive sprocket 9 from a position where the detection piece 32 maintains a predetermined distance C with respect to the step 2. It detects that it moved to H1.

  2 to 4, reference numeral 50 denotes an auxiliary rail that has an inclined surface along the movement locus of the step 2 that moves on the outer periphery of the drive sprocket 9 and supports the step 2 that has fallen off the step chain 3.

  As shown in FIG. 4, the step 2 that is disconnected from the step chain 3 falls downward about an axis centering on the roller 5 forward in the movement direction of the step 2, but the step 2 of the dropped step 2 The roller 5 is transferred to the return-side guide rail 6b by supporting the surface 2a with the auxiliary rail 50. As shown in FIG. 3, the auxiliary rail 50 is disposed inside the return side guide rails 6 b and 6 c while being shifted in the width direction of the passenger conveyor 1, and is fixed to the truss 4 via the attachment member 51. ing.

  In the abnormality detection device 30 of the present embodiment, when the step 2 that is loosely connected to the step chain 3 or is disconnected from the step chain 3 moves on the outer periphery of the drive sprocket 9, the tread surface 2a of the step 2 becomes horizontal. Between the toothed portion 9a of the drive sprocket 9 and the roller 5 by gravity acting on the step 2 in a section from the position perpendicular to the position to the position where the step 2 reaches above the return side guide rails 6b and 6c. Is separated from the outer peripheral surface of the drive sprocket 9.

  The step 2 away from the outer peripheral surface of the drive sprocket 9 abuts on the arc portion 35 of the detection piece 32 or the protrusion 40 protruding from the arc portion 35 and moves the detection piece 32 in one horizontal direction H1 away from the drive sprocket 9. The actuator 34a of the switch 34 is operated by pressing. As a result, the abnormality detection device 30 detects the step 2 in the vicinity of the drive sprocket 9 and the driven sprocket 10 that is loosely connected to the step chain 3 or disconnected from the step chain 3, and operates the passenger conveyor 1. To stop.

  As described above, in the abnormality detection device 30 of the present embodiment, the projecting portion 40 that protrudes toward the drive sprocket 9 is provided on the arc portion 35 of the detection piece 32, and the step 2 that moves around the protrusion 40 and the outer periphery of the drive sprocket 9. Is smaller than the distance C from the arc portion 35 to the step 2 that moves on the outer periphery of the drive sprocket 9.

  Therefore, a state in which the connection of the step 2 to the step chain 3 has started to loosen while improving the mounting workability of the arc portion 35 by providing a certain distance C to the step 2 moving around the outer periphery of the drive sprocket 9 in the arc portion 35. Even when the distance from the outer peripheral surface of the drive sprocket 9 is small, as in the case where the length of the tread surface 2a along the moving direction of the step 2 is smaller than the diameter of the drive sprocket 9, the protrusion At step 40, the step 2 is brought into contact and an abnormality of the step 2 can be detected, and an abnormal connection of the step to the step chain can be detected at an early stage.

  Moreover, in the abnormality detection apparatus 30 of this embodiment, since the detection piece 32 is provided with the extension part 35a extended below from the lower support member 36 which supports the lower end part, downward force which acts on the step 2 by gravity. Therefore, the detection piece 32 can be arranged at a position where the step 2 is easy to drop off, and the detection piece 32 can be arranged over a wide range of the outer peripheral surface of the drive sprocket 9.

  Further, since the escape portion 35b that bends downward is provided at the tip of the extension portion 35a, the roller 5 is moved to the detection piece 32 when the roller 5 of the step 2 moves from the drive sprocket 9 to the return-side guide rail 6c. Inadvertent contact can be suppressed.

  In addition, although this embodiment demonstrated the case of the sidewalk which moves as a passenger conveyor to which the abnormality detection apparatus 30 is applied, the abnormality detection apparatus 30 can also be applied to an escalator.

  As mentioned above, although embodiment of this invention was described, this embodiment is shown as an example and is not intending limiting the range of invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. This embodiment and its modifications are included in the scope of the present invention and the gist thereof, and are also included in the invention described in the claims and the equivalent scope thereof.

DESCRIPTION OF SYMBOLS 1 ... Passenger conveyor 2 ... Step 2a ... Treading surface 3 ... Step chain 4 ... Truss 5 ... Roller 6 ... Guide rail 6a ... Outward side guide rail 6b, 6c ... Return way side guide rail 7 ... Entrance / exit 8 ... Entrance / exit 9 ... Drive Sprocket 30 ... Abnormality detection device 32 ... Detection piece 34 ... Switch 34a ... Actuator 35 ... Arc portion 35a ... Extension portion 35b ... Escape portion 36 ... Lower support member 37 ... Mounting portion 38 ... Upper support member 39 ... Spring 40 ... Projection 50 ... Auxiliary rail 51 ... Mounting member

Claims (5)

An endless step chain that is looped between a pair of sprockets and circulates; a plurality of rollers disposed at predetermined intervals provided in the step chain; and a plurality of steps connected to the step chain; In the anomaly detection device for a passenger conveyer, provided with guide rails arranged along the circulation movement direction of the step chain and guiding the rollers,
A detection piece including a circular arc portion provided along the outer periphery of the sprocket , spaced from the outer peripheral portion of the sprocket over which the step chain is spanned in a radially outward direction ;
A protrusion protruding from the inner surface side of the arc portion toward the sprocket ;
A switch that detects the detection piece when the roller is removed from the sprocket, and the detection piece moves in a direction away from the outer periphery of the sprocket when the removed roller comes into contact with the protrusion, and
An abnormality detection device for stopping operation of a passenger conveyor when the switch detects the detection piece;
An abnormality detection device for a passenger conveyor, comprising: The pair of sprockets includes a driving sprocket that is rotationally driven by a driving device, and a driven sprocket,
The detection piece is provided along the drive sprocket;
The apparatus for detecting an abnormality of a passenger conveyor according to claim 1. The detection piece is provided along the drive sprocket and the driven sprocket.
The apparatus for detecting an abnormality of a passenger conveyor according to claim 2. A support member for supporting a lower end portion of the arc portion of the detection piece;
The detection piece includes an extending portion that extends downward from the support member.
The apparatus for detecting an abnormality of a passenger conveyor according to claim 1. The guide rail includes an outward guide rail that guides the roller of the step that moves from the entrance to the exit, and a return side guide rail that guides the roller of the step that moves from the exit to the entrance. ,
An auxiliary rail that supports the step dropped from the step chain is provided from below the extension portion to below the return side guide rail.
The abnormality detection device for a passenger conveyor according to claim 4.

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