JP2010208799A - Safety device for passenger conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety device for a passenger conveyor, capable of preventing a nipping accident of a passenger between a building structure and a moving handrail. <P>SOLUTION: This safety device includes a movable body 18 having a cross-sectional shape equal to a handrail rail 11 and displaceable by a specific quantity in the horizontal direction to the longitudinal direction of the handrail rail 11, an outer frame 17 fixed to a handrail 23 and containing the movable body 18, and an elastic body 22 for applying a specific pressing force in the longitudinal horizontal direction of the movable body 18. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a passenger conveyor such as an escalator, and in particular, an accident in which a passenger is caught between a building structure and a moving handrail near a so-called triangular portion where the ceiling of the building and the moving handrail of the passenger conveyor intersect. It is related with the safety device which prevents.

  First, the basic structure of a general escalator currently in widespread use will be described with reference to FIGS.

  FIG. 11 is an explanatory view of a basic outline structure of a conventional escalator as viewed from the side. As shown in the figure, a passenger conveyor such as an escalator (hereinafter referred to as an escalator) is wound around a sprocket 1. A pair of left and right (not shown on the left side) endlessly connected chain 2 is rotated by a drive unit 3 and a number of continuous steps 4 mounted on the entire circumference of the chain 2 are moved. It is configured to carry passengers.

  In addition, railings 5 are erected on the left and right sides of the steps 4 on which the passengers ride, along the direction of movement. Further, on the outer periphery of the railings 5, there are movable handrails 6 made of resin for gripping the passengers. Is provided. The moving handrail 6 is guided by a steel handrail rail 7 fixed to the outer periphery of the balustrade 5 and moves in the same direction at the same speed as the step 4.

  FIG. 12 is a cross-sectional view showing the structure of a one-side balustrade part of a conventional escalator, and a handrail rail 7 is fixed to the upper end of a balustrade 5 formed of a glass plate or a stainless steel panel along the outer periphery thereof. Has been. Further, a moving handrail 6 is fitted on the handrail rail 7. Outer decks 8 are installed above and below the balustrade 5. These outer decks 8 are provided between the balustrade 5 and the wall surface of the building, or form a cover of a lighting device provided on the upper portion of the balustrade 5 although not shown. On the other hand, a step 4 is attached to the inner deck 9 via a connector 10 at the lower part of the balustrade 5.

  FIG. 13 is a cross-sectional view showing the configuration of the handrail rail and the movable handrail of portion A in FIG. This handrail rail 7 is made of steel, and as shown in FIG. 13, its cross section is formed in a symmetrical “h” shape, and both ends are provided with brim portions 7A facing outward. On the other hand, the cross section of the movable handrail 6 made of resin has a “C” shape, and both edge portions thereof form a jaw portion 6A facing inward.

  The movable handrail 6 is configured to be able to travel and move without dropping on the handrail rail 7 by fitting the jaw portion 6A to the collar portion 7A of the handrail rail 7. In this case, since the handrail rail 7 is fixed to the balustrade 5 via the outer deck 8, the movable handrail 6 is not displaced in the lateral direction except for a gap with the handrail rail 7.

  In such a conventional escalator, generally, in a passage of an escalator installed in a building, there is a so-called triangular portion in which the ceiling of the building and the moving handrail 6 of the escalator or the lower surface of an adjacent escalator intersect. Exists. In recent years, accidents have occurred frequently in the triangular part.

  For this reason, the Building Standards Law requires the installation of a protective plate to prevent accidents caused by being caught in the triangular part. This protective plate is composed of, for example, a fixed protective plate fixed to the ceiling portion of the building, and a movable warning plate that is suspended in front of the fixed protective plate and warns of approach to the fixed protective plate. ing.

  Until now, various safety devices have been proposed to prevent accidents between the triangular portions. For example, as described above, a warning body or the like is provided in front of the protective plate to warn the passenger of the approach to the triangular portion, or a sensor or the like is built in the protective plate to prevent contact between the protective plate and the passenger. Something to detect is proposed.

  However, in the former case, these conventional techniques require work on the outer deck, that is, the design body or balustrade that protrudes from the balustrade to the outside, which is provided between the balustrade and the exterior plate or the wall of the building. Therefore, these design characteristics may be impaired.

  In the latter case, in order to secure a power source, it is necessary to provide wiring up to the protective plate, or to use a wireless device to receive the detection signal, and the configuration is complicated and the device is expensive. There was a problem of becoming.

  On the other hand, a technique is disclosed in which a detection body is provided inside the handrail rail, and it is detected that a passenger has boarded the railing by a load applied to the moving handrail (Patent Document 1). The design of the deck is not impaired and the structure is simple.

Japanese Utility Model Publication No. 1-121086

  However, in recent years, an accident has occurred in which a passenger's head is caught between a fixed protection plate installed in a building and a moving handrail.

  The accident disclosed between the fixed protection plate and the moving handrail cannot be prevented by the technique disclosed in [Patent Document 1].

  This is because the technique disclosed in [Patent Document 1] can detect when a load is received from the upper surface of the moving handrail, such as being sandwiched between the ceiling of the building and the moving handrail, Since it cannot be detected when receiving a load from the side surface of the moving handrail that is sandwiched between the moving handrail, the detection is not sufficient for pinching.

  Therefore, the object of the present invention can completely prevent not only a pinching accident that receives a load from the upper surface of the moving handrail, but also a pinching accident that receives a load from the side surface of the moving handrail. It is to provide a safety device for passenger conveyors.

  The safety device for a passenger conveyor according to the present invention includes a pair of endlessly connected chains, a number of continuous steps coupled to the chains, a balustrade erected along both sides of the steps, and the balustrade A passenger conveyor composed of a moving handrail that moves in the same direction at the same speed as the steps, and a handrail rail that guides the moving handrail, and has a cross-sectional shape equivalent to that of the handrail rail, A movable body capable of a certain amount of displacement in the lateral direction with respect to the longitudinal direction, a fixed body fixed to the balustrade and containing the movable body, and a constant pressing force in the longitudinal and lateral direction of the movable body And an elastic body that provides the above.

  In the passenger conveyor safety device according to the present invention, the operation of the passenger conveyor is urgently performed by detection means for detecting an abnormal displacement in the longitudinal and transverse directions of the movable body and a detection output that recognizes the abnormality from the detection means. The operation command means for stopping is provided.

  Furthermore, in the safety device for passenger conveyors of the present invention, in the internal longitudinal direction of the fixed body, rotating bodies supported by a support and having different heights are alternately arranged, and a moving handrail is installed on the upper surface thereof. It is characterized by.

  According to the present invention, when a passenger sandwiches a body part such as a head between a building structure and a moving handrail of an escalator such as a fixed protection plate of a triangular part or a wall surface of the building, the moving handrail is a step. Since it is displaced to the side, the impact is eased when pinched, and the space of the pinched part can be afforded, so the passenger himself can pull out the body part such as the pinched head, thus reducing the extent of the accident Can be reduced.

  Further, according to the present invention, since the safety device is configured as a part of a normal handrail rail, the design is not affected, the structure is simple, and the device can be realized at low cost.

  Furthermore, according to the present invention, when the body part such as the head is sandwiched between the building structure and the moving handrail of the escalator, the escalator can be automatically stopped emergencyly, Damage can be minimized, and it is judged whether it is pinched or simply malfunctioned according to the output time of the detection signal from the sensor, so it provides a safer safety device with less unnecessary operation can do.

  In addition, according to the present invention, the passengers who are moving on the handrail are given a sense of incongruity, such as a knack, to warn of the approach to the dangerous place and to let the passengers recognize the danger in advance. Can be greatly reduced.

It is a principal part side view of the escalator which applied the safety device of the passenger conveyor which concerns on embodiment of this invention. It is the perspective view which showed the structure of the joint part of the safety device and handrail rail of the dotted-line circle mark B part of FIG. 3 is an exploded top view showing the structure of the safety device of FIG. FIG. 4 is a cross-sectional view along the arrow CC in FIG. 3. It is a top view of the safety device concerning a 2nd embodiment of the present invention. FIG. 6 is a cross-sectional view taken along arrow DD in FIG. 5. It is a block diagram which shows the structure of the control circuit for performing operation control by the safety device shown in FIG. It is the flowchart which showed the procedure which performs operation control using the control circuit of FIG. It is the side view which showed the structure of the warning device which comprises some safety devices which concern on the 3rd Embodiment of this invention. FIG. 10 is a cross-sectional view taken along arrow EE in FIG. 9. It is a side view which shows the structure of the conventional escalator. It is sectional drawing which shows the structure of the one-side balustrade part of the conventional escalator shown in FIG. It is sectional drawing which expands and shows the structure of A part enclosed with the dotted line of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Embodiment 1]
A passenger conveyor safety device according to a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a side view of an essential part of an escalator to which a passenger conveyor safety device according to an embodiment of the present invention is applied. As shown in the figure, a safety device 15 which will be described later is provided in a part of the handrail rail 11 which is caught between the rails 11, that is, a section where the movable warning plate 12 and the fixed protection plate 13 are installed on the building ceiling 14. Is installed.

  FIG. 2 is a perspective view showing in detail the configuration of the dotted-line circle B portion in FIG. 1, and shows the joint portion between the safety device 15 and the handrail rail 11 provided with the collar portion 11A.

  The safety device 15 includes an outer frame 17 fixed to the outer deck 16 and a movable body 18 that is inserted into the outer frame 17 and has a collar portion 18A. However, it is being fixed so that it may become the same surface as the side surface of the handrail rail 11 which continues before and after that.

  A moving handrail 19 is attached to the collar portion 11 </ b> A of the handrail rail 11 and the collar portion 18 </ b> A of the movable body 18.

  FIG. 3 is an explanatory view of the outer frame and the movable body portion of the safety device 15 as viewed from above, and shows a state where the safety device 15 is installed on the escalator.

  In the figure, the bottom surface of the movable body 18 is provided with a plurality of elongated holes 18 </ b> B arranged in the longitudinal direction in the width direction along the longitudinal direction of the movable body 18. On the other hand, a plurality of studs 17A are provided on the bottom surface of the outer frame 17 in the inner direction.

  Then, the stud 17A is inserted into the long hole 18B of the movable body 18 described above, and a stopper 20 such as a nut is screwed and tightened to the stud 17A, whereby the movable body 18 is installed on the outer frame 17. In this case, the movable body 18 is installed so as to be movable in the width direction without completely tightening the stopper 20.

  A plurality of elastic bodies 22 such as springs are inserted in the gap 21 between the outer frame 17 and the movable body 18 along the longitudinal direction of the movable body 18.

  4 is a cross-sectional view showing the safety device 15 cut along the arrow CC in FIG. The safety device 15 includes an outer frame 17 having a “U” -shaped cross section, and a movable body 18 having a “H” -shaped cross section inserted into the outer frame 17. The movable body 18 is provided with a flange portion 18A on both edges thereof, and the flange portion 18A has a structure in which the length is different on the left and right sides (relative to the drawing).

  A moving handrail 19 is fitted on the upper surface of the movable body 18 so as to cover the collar portion 18A.

  When the movable body 18 is inserted and installed in the outer frame 17, the movable body 18 is installed at a position where the right side surface of the movable body 18 contacts the right side surface of the outer frame 17, that is, the inner surface of the side surface opposite to the step. Further, the flange portion 18A of the movable body 18 is installed so as to be continuous with the flange portion 11A (the above FIG. 2) of the handrail rail 11 (the above FIG. 2) following the front and rear thereof.

  The outer frame 17 is completely fixed to the balustrade 23 with the outer deck 16 in between, and a plurality of studs 17A are provided on the bottom surface thereof as shown in FIG. The movable body 18 is inserted into a long hole 18 </ b> B (FIG. 3) formed in the movable body 18, and the movable body 18 is installed so as to be movable within the outer frame 17 by a stopper 20.

  In addition, in the gap 21 between the left side surface of the movable body 18, that is, the side surface on the step side and the left side surface of the outer frame 17, the elastic body 22 such as a spring extends along the longitudinal direction of the movable body 18 as described above. Are inserted and installed.

  In such a configuration, for example, since the passenger has now moved out of the moving handrail 19 to look down the floor, a part of the body such as the head is sandwiched between the wall surface (not shown) of the building. To do. In this case, a load is applied to the moving handrail 19 so as to displace it to the left side in the width direction, that is, the step side. This weight is transmitted to the movable body 18 via the moving handrail 19 and is displaced to the step side.

  Therefore, the passenger can remove a part of the body such as the head sandwiched because the gap between the moving handrail 19 and the wall surface (not shown) of the building is expanded by the displacement of the moving handrail 19, Accidents can be prevented.

  Note that a part of the handrail rail where the safety device 15 (FIG. 1) is installed has a length sufficient for the movable handrail 19 to be displaced in the lateral direction, for example, a length of at least 1 m. And

  On the other hand, when the movable body 18 is unloaded, the movable body 18 is pressed against the opposite side surface of the outer frame 17 with a certain degree of elasticity by the elastic body 22 provided in the gap 21 between the outer frame 17 and the movable body 18. Kept in the same state.

  Therefore, the movable body 18 is not displaced in a normal use state such as when the passenger grabs the moving handrail 19.

  Further, the movable body 18 is configured to be displaced only when a load is applied from the opposite step side to the step side. For example, the movable body 18 can be installed in the installation section of the safety device 15 with the passenger leaning on the moving handrail 19. There is no displacement even when passing or hitting a load.

[Embodiment 2]
A second embodiment according to the present invention will be described with reference to FIGS.

  5 and 6, the same components as those in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description thereof is omitted. Hereinafter, the components different from those in FIGS. 1 to 4 are described. Only will be described mainly.

  FIG. 5 is a top view of the safety device 15 according to the second embodiment of the present invention. As shown in the figure, photoelectric sensors are installed in the handrail rails 11 at both ends of the safety device 15 (FIG. 1). This photoelectric sensor includes a projector 24A disposed at the left end of the safety device 15 and a light receiver 24B disposed at the right end. The light projector 24A and the light receiver 24B are connected to a control circuit (not shown) via a wiring 24C laid in the handrail rail 11.

  The light projector 24A and the light receiver 24B receive the signal light from the light projector 24A by the light receiver 24B when the movable body 18 is pressed against the opposite step side by the elastic body 22, that is, when there is no load. Is arranged to be.

  In addition, detection pieces 25 are fixed to both ends of the movable body 18 in the longitudinal direction. The detection piece 25 is disposed so as to sufficiently block the signal light from the projector 24A when the movable body 18 moves to the step side against the elastic body 22.

  FIG. 6 is a cross-sectional view of the safety device taken along the arrow DD in FIG. 5 and shows a state where the detection piece 25 is attached to the left end (FIG. 5) of the movable body 18 in the longitudinal direction. The movable body 18 is attached to the balustrade 23 via the outer deck 16 by a stud 17A inserted into the long hole 18B (FIG. 5) and a stopper 20 screwed into the stud 17A. The movable body 18 is movably installed along the long hole 18B. An elastic body 22 is disposed in a gap 21 between the left side surface of the movable body 18 and the right inner surface of the outer frame 17.

  In such a configuration, a load exceeding the normal state is applied to the moving handrail 19 due to the passenger getting on the body, and when the movable body 18 is displaced against the elastic body 22 on the step side, a signal from the projector 24A Light is blocked by the detection piece 25.

  When the signal light from the projector 24A is not received by the light receiver 24B, a sensor (not shown) outputs a detection signal, and the detection signal is taken into the control circuit by the wiring 24C.

  In the control circuit, a threshold is set for the output time of the detected detection signal, and it is judged whether an accident has occurred or a malfunction has occurred. If it is judged that an accident has occurred, the operation of the escalator is stopped urgently. Let

  FIG. 7 is a block diagram showing the configuration of a control circuit for performing operation control by such a safety device. A signal from the control switch SW31 is sent to the detection circuit 32, and whether or not there is an abnormality is detected by the detection circuit 32. Further, the detection signal is sent to the operation command circuit 33.

  In this operation command circuit 33, if the detection signal is a signal recognizing an abnormality, an operation stop signal is issued to urgently stop the escalator. On the other hand, if the detection signal is a signal not recognizing an abnormality, the operation is continued.

  FIG. 8 is a flowchart showing a procedure for performing operation control using the control circuit of FIG. 7. When starting the operation of the escalator (step S1), it is first determined whether or not the operation switch of the operation has been activated. (Step S2) When it is determined that the operation has been performed, the process proceeds to the next Step S3, where it is determined whether or not the output time of the detection signal output from the detection circuit 32 (FIG. 7) exceeds the set threshold A. (Step S3). As a result of the determination, if it is determined that the output time exceeds the threshold A, an emergency stop command is issued from the operation command circuit 33 (FIG. 7) (step S4), and the escalator is stopped (step S5).

  On the other hand, if the output time t of the detection signal does not exceed the set threshold A in step S3, the escalator continues to operate as it is.

[Embodiment 3]
A passenger conveyor safety device according to a third embodiment of the present invention will be described with reference to FIGS.

  In these drawings, the same components as those in FIGS. 1 to 4 are denoted by the same reference numerals, detailed description thereof will be omitted, and the components that are mainly different from those in FIGS. 1 to 4 will be described below. explain.

  FIG. 9 is a side view showing the structure of a warning device that constitutes a part of the safety device according to the third embodiment of the present invention. In the figure, the warning device 26 is fixedly installed in the longitudinal direction in the handrail rail 11 with a fixture 27 such as a nut, and includes a plurality of supports 28 and a plurality of rollers 29A attached to the supports 28. To 29E.

  The plurality of rollers 29 </ b> A to 29 </ b> E are arranged such that adjacent rollers have different heights.

  That is, in the present embodiment, the rollers 29A, 29C and 29E and the rollers 29B and 29D arranged between them have the same height on the upper surface, and rollers having different heights are alternately arranged. ing.

  Here, the rollers 29 </ b> A, 29 </ b> C, and 29 </ b> E are arranged at a height that is in contact with the moving handrail 19, and the rollers 29 </ b> B and 29 </ b> D are arranged at a low position that is not in contact with the moving handrail 19.

  FIG. 10 is a cross-sectional view of the warning device 26 taken along the arrow EE in FIG. 9, and a pair of rollers 29 having the same diameter are rotatably attached to the support 28 in the handrail rail 11. . The bottom of the support 28 is fixedly installed on the bottom surface of the handrail rail 11 with a stud 30 and a fixture 27 such as a nut.

  In addition, the roller 29 of the same figure has shown the state arrange | positioned in the height which contacted the moving handrail 19. FIG. Moreover, the support body 28 is installed in the front part in combination with the safety device 15 (FIG. 1) mentioned above.

  In such a configuration, when a passenger gets out of the body of the moving handrail 19 such as looking into the outside of the balustrade 23 and passes through a location where the warning device 26 is installed, the rollers 29A whose heights are arranged unevenly Since ~ 29E gives the passenger a sense of incongruity, such as a knack, the passenger can be caught in advance and can detect a dangerous area where an accident may occur.

  In the present embodiment, rollers having the same diameter are used, but the same effect can be obtained by alternately arranging large and small rollers having different outer diameters.

DESCRIPTION OF SYMBOLS 1 Sprocket 2 Chain 3 Drive machine 4 Step 5,23 Parapet 6,19 Moving handrail 6A Moving handrail jaw 7,11 Handrail rail 7A, 11A Handrail rail collar 8,16 Outer deck 9 Inner deck 10 Connecting tool 12 Movable Warning plate 13 Fixed protective plate 14 Building ceiling 15 Safety device 17 Outer frame 17A, 30 Stud 18 Movable body 18A Movable brim portion 18B Long hole 20 Stopper 21 Gap 22 Elastic body 24A Photoelectric sensor projector 24B Photoelectric sensor receiver 25 Detection piece 26 Warning device 27 Fixing tool 28 Support 29A to 29E Roller 31 Control switch 32 Detection circuit 33 Operation command circuit

Claims (4)

  A pair of endlessly connected chains, a number of continuous steps connected to the chain, a railing erected along both sides of the step, and the outer periphery of the railing at the same speed as the step A passenger conveyor composed of a moving handrail that moves in the same direction and a handrail rail that guides the moving handrail has a cross-sectional shape equivalent to that of the handrail rail, and is constant in the lateral direction with respect to the longitudinal direction of the handrail rail. A movable body capable of displacement, an outer frame fixed to the balustrade and enclosing the movable body, and an elastic body that gives a constant pressing force in the longitudinal and transverse directions of the movable body. A passenger conveyor safety device.   And a detection means for detecting an abnormal displacement in the longitudinal and transverse directions of the movable body, and an operation command means for urgently stopping the operation of the passenger conveyor by a detection output recognizing the abnormality from the detection means. The safety device for a passenger conveyor according to claim 1.   The detection means includes a light projector and a light receiver, and a detection piece is provided on the inner wall surface of the movable body so that the signal light from the light projector is received by the light receiver only when the movable body is in an unloaded state. The safety device for a passenger conveyor according to claim 2, wherein:   A plurality of rotating bodies that are supported by a support body and arranged so as to be alternately different in height are provided in the inner longitudinal direction of the outer frame, and the moving handrail is installed on the upper surface of these rotating bodies. The safety device for a passenger conveyor according to claim 1.

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