Passenger conveyor

Abstract

Provided is a passenger conveyor that can prevent a passenger from falling into the machine room. 【Solution means】The passenger conveyor of the present invention includes a step that moves in the front-rear direction along a truss, a motor that moves the step, a control device that controls the motor to perform a normal operation of transporting passengers, a landing plate arranged at the boarding and alighting opening of the truss, a fixing portion 120 that fixes the landing plate to the truss, and a detection portion 70 that detects that the landing plate is fixed to the truss by the fixing portion 120. The control device enables the execution of the normal operation when it detects that the landing plate is fixed to the truss by the fixing portion 120, and prohibits the execution of the normal operation when it does not detect that the landing plate is fixed to the truss.

Description

Technical Field

[0001] Embodiments of the present invention relate to a passenger conveyor.

Background Art

[0002] In passenger conveyors such as escalators and moving walkways, a boarding and alighting plate is provided at the boarding and alighting opening of the truss, and users pass over the boarding and alighting plate when getting on and off the passenger conveyor. Below the boarding and alighting plate, a machine room for housing the driving device of the passenger conveyor and the like is provided, and the boarding and alighting plate is removed from the truss during maintenance and inspection of the passenger conveyor.

[0003] Conventionally, for the safety of passengers and maintenance personnel, a passenger conveyor provided with a detection device for detecting whether or not the boarding and alighting plate is installed on the ceiling surface of the machine room has been proposed. In such a passenger conveyor, when the detection device detects that the boarding and alighting plate is installed on the ceiling surface of the machine room, a normal operation mode for transporting the boarded passengers is executed, and when the detection device does not detect that the boarding and alighting plate is installed on the ceiling surface of the machine room, the execution of the normal operation mode is prohibited and the maintenance operation mode can be executed.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, even if the boarding and alighting plate is installed on the ceiling surface of the machine room, if the boarding and alighting plate is not properly fixed to the truss, there is a risk that the boarding and alighting plate will come off the truss and passengers will fall into the machine room. Therefore, in view of the above circumstances, an object of the present invention is to provide a passenger conveyor capable of preventing passengers from falling into the machine room.

Means for Solving the Problems

[0006] The passenger conveyor according to the embodiment includes a truss extending in the front-rear direction, a step moving in the front-rear direction along the truss, a motor for moving the step, a control device for controlling the motor to perform a normal operation of conveying passengers, a landing plate disposed at the boarding and alighting openings of the truss, a landing plate support portion for supporting the landing plate from below, It is inserted into an insertion hole provided in a placement portion configured to have a space between the boarding and alighting plate and the boarding and alighting plate support portion. a fixing portion that is screwed into a female screw portion provided in the landing plate support portion to fix the landing plate to the truss, and a detection portion that detects that the fixing portion is screwed into the female screw portion and when the tip end portion of the fixing portion protrudes downward from the landing plate support portion, an operating portion is pressed downward and the landing plate is fixed to the truss by the fixing portion. The fixing portion is inserted into the insertion hole provided in the placement portion, and is screwed into the female screw portion provided in the boarding and alighting plate support portion at a position away from the boarding and alighting plate downward. When the control device detects that the landing plate is fixed to the truss by the fixing portion, the control device enables the execution of the normal operation, and prohibits the execution of the normal operation when it does not detect that the landing plate is fixed to the truss.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0008] Hereinafter, a passenger conveyor according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5. In the present embodiment, an escalator 10 that conveys passengers between the upper floor and the lower floor of a building 1 will be described as the passenger conveyor.

[0009] In the following description, the longitudinal direction of the truss 12 may be referred to as the front-rear direction, and the width direction may be referred to as the left-right direction. Also, the front-rear direction and the left-right direction indicate the directions when looking from the upper floor to the lower floor, assuming that the lower floor side is the front side and the upper floor side is the rear side.

[0010] (1) Escalator 10 The overall structure of the escalator 10 will be described with reference to FIG. 1. FIG. 1 is an explanatory view of the escalator 10 seen from the left side. However, in order to make the internal structure of the escalator 10 easier to understand, the illustration of the members on one side (left side) of the escalator 10 is omitted.

[0011] The truss 12, which is the framework of the escalator 10, straddles the upper and lower floors of the building 1 and is supported in the front-rear direction using support angles 2 and 3.

[0012] Inside the upper floor side machine room 14 at the upper end of the truss 12, a drive device 18 for running the steps 30 and a pair of left and right step sprockets 24, 24 are provided. This drive device 18 has a motor 20, a speed reducer 21, a drive small sprocket 19 attached to the output shaft of this speed reducer 21, and a disk-type electromagnetic brake 23 that stops the rotation of the motor 20 and holds the stopped state. A drive large sprocket 17 is coaxially attached to the pair of left and right step sprockets 24, 24, and an endless drive chain 22 is bridged between the drive small sprocket 19 and the drive large sprocket 17. Also, inside the upper floor side machine room 14, a control device 50 for controlling the motor 20, the electromagnetic brake 23, etc. is provided.

[0013] Inside the lower floor mechanical room 16 at the lower end of the truss 12, a pair of left and right driven sprockets 26, 26 are provided. Between the pair of left and right tread sprockets 24, 24 on the upper floor side and the pair of left and right driven sprockets 26, 26 on the lower floor side, a pair of endless tread chains 28, 28 are spanned. Between the pair of left and right tread chains 28, 28, a pair of first wheels 301, 301 of a plurality of treads 30 are connected at regular intervals. When the motor 20 rotates, the first wheel 301 of the tread 30 travels on a dedicated guide rail for the first wheel (not shown) fixed to the truss 12, and the second wheel 302 of the tread 30 travels on the dedicated guide rail 25 for the second wheel fixed to the truss 12.

[0014] On the upper left and right sides of the truss 12, a pair of left and right handrails 36, 36 are erected. On the upper part of this handrail 36, a handrail rail 39 is provided, and an endless handrail belt 38 moves along this handrail rail 39.

[0015] On the lower front part of the upper floor side of the pair of left and right handrails 36, an upper floor front skirt guard 40 is provided, and on the lower front part of the lower floor side, a lower floor front skirt guard 42 is provided. Inlets 46, 48, which are the entrances and exits of the handrail belt 38, protrude from the front skirt guards 40, 42 respectively. On the lower side parts of the sides of the pair of left and right handrails 36, skirt guards (inner deck) 44 are provided respectively, and the tread 30 travels between the pair of left and right skirt guards 44, 44.

[0016] The handrail belt 38 moves in synchronization with the tread 30 when a belt sprocket (not shown) rotates together with the tread sprocket 24.

[0017] On the ceiling surface partitioning the upper side of the upper floor mechanical room 14, a boarding and alighting plate 32 is provided horizontally. The upper floor boarding and alighting plate 32 is fixed to the truss 12 by a fixing part 120, and forms a boarding and alighting opening between the pair of left and right skirt guards 44, 44 on the upper floor side.

[0018] On the ceiling surface that partitions the upper side of the lower-level machine room 16, a boarding and alighting plate 34 is horizontally provided. The lower-level boarding and alighting plate 34 is fixed to the truss 12 by a fixing portion 120, and a boarding and alighting opening is formed between a pair of left and right skirt guards 44, 44 on the lower level. At the tip of the upper-level boarding and alighting plate 32, a comb-shaped rubber 60 is provided, and the step 30 enters or is pulled out from this rubber 60. Also, a comb-shaped rubber 62 is provided at the tip of the lower-level boarding and alighting plate 34.

[0019] Below the boarding and alighting plates 32, 34, detection portions 70 for detecting that the boarding and alighting plates 32, 34 are fixed to the truss 12 by the fixing portion 120 are respectively provided. This detection portion 70 will be described in detail later.

[0020] On both the left and right sides of the truss 12, a pair of left and right railings 36, 36 are erected. A handrail belt 38 moves on the upper part of this railing 36. A front skirt guard 40 that covers the lower front part on the upper level side of the railing 36 is provided, and on the lower front part on the lower level side, a lower-level front skirt guard 42 is provided. From the front of the front skirt guards 40, 42, inlets 46, 48 which are the entrances and exits of the handrail belt 38 protrude. A skirt guard 44 is provided at the lower side part of the side surface of the railing 36.

[0021] (2) The upper-level machine room 14 and the boarding and alighting plate 32 Next, the upper-level machine room 14 and the boarding and alighting plate 32 will be described with reference to FIGS. 2 and 3. Note that since the upper-level machine room 14 and the boarding and alighting plate 32 have the same structure as the lower-level machine room 16 and the boarding and alighting plate 34, the upper-level machine room 14 and the boarding and alighting plate 32 will be described, and the description of the lower-level machine room 16 and the boarding and alighting plate 34 will be omitted.

[0022] As shown in FIG. 2, the upper-level boarding and alighting plate 32 is composed of three divided first boarding and alighting plates 32A, second boarding and alighting plates 32B, and third boarding and alighting plates 32C.

[0023] The first boarding and alighting plate 32A is a metal plate with a T-shaped planar shape that extends from between a pair of left and right railings 36, 36 to the entrance side of the boarding and alighting opening. A rubber 60 is provided at the front end of the first boarding and alighting plate 32A. The second boarding and alighting plate 32B is a rectangular metal plate arranged adjacent to the rear side of the first boarding and alighting plate 32A. The third boarding and alighting plate 32C is a rectangular metal plate arranged adjacent to the rear side of the second boarding and alighting plate 32B.

[0024] As shown in FIGS. 3 and 4, mounting portions 96 that protrude downward are provided along the front-rear direction on both the left and right sides of these three first boarding and alighting plates 32A, second boarding and alighting plates 32B, and third boarding and alighting plates 32C.

[0025] The mounting portion 96 is formed by bending a metal plate into a U-shaped cross-section that opens outward in the width direction, and includes an upper horizontal portion 96a provided along the lower surfaces of the three boarding and alighting plates 32A, 32B, and 32C, an inner portion 96b that protrudes downward from the inner end in the width direction of the upper horizontal portion 96a, and a mounting piece 96c that protrudes horizontally from the lower end of the inner portion 96b toward the outside in the width direction.

[0026] The truss 12 that constitutes the upper-floor machine room 14 is assembled such that an upper left member 74, an upper right member 76, a lower left member 78, and a lower right member 80, which are made of metal frame materials, can form a space inside. That is, the upper left member 74 extending in the front-rear direction is arranged horizontally, the upper right member 76 extending in the front-rear direction at the same height as the upper left member 74 is arranged horizontally, the lower left member 78 extending in the front-rear direction below the upper left member 74 is arranged horizontally, and the lower right member 80 extending in the front-rear direction below the upper right member 76 is arranged horizontally. And between the rear end portions of the upper left member 74 and the upper right member 76, a left member 82 is provided in the vertical direction, and between the rear end portions of the upper right member 76 and the lower right member 80, a right member 84 is provided in the vertical direction. Also, between the rear end portions of the upper left member 74 and the upper right member 76, an upper horizontal member 86 is provided in the horizontal direction, and between the rear end portions of the lower left member 78 and the lower right member 80, a lower horizontal member 87 is provided in the horizontal direction. And the machine room 14 is surrounded by the upper left member 74, the upper right member 76, the lower left member 78, the lower right member 80, the left member 82, the right member 84, the upper horizontal member 86, and the lower horizontal member 87. On the rear surface of this machine room 14, a control device 50 is attached via an attachment plate 51.

[0027] On the upper left member 74 at the upper part of the machine room 14, a metal boarding plate support portion 88 that protrudes horizontally toward the inner side (right side) in the width direction is provided along the front-rear direction. Also, on the upper right member 76, a metal boarding plate support portion 90 that protrudes horizontally toward the inner side (left side) in the width direction is provided along the front-rear direction.

[0028] On each of these boarding plate support portions 88, 90, edge metals 91, 92 that protrude upward are provided. The boarding plate support portions 88, 90 support the left and right end portions of the three boarding plates 32A, 32B, 32C from below, with the mounting pieces 96c of the mounting portions 96 provided on the three boarding plates 32A, 32B, 32C placed between the edge metals 91, 92.

[0029] The boarding and alighting plates 32A, 32B, and 32C, and the upper horizontal portion 96a and the mounting piece 96c of the mounting portion 96 are provided with insertion holes through which a fixing portion 120 such as a screw is inserted, and female screw portions 93, 93 are provided on the boarding and alighting plate support portions 88, 90. The fixing portion 120 is inserted into the insertion holes provided in the upper horizontal portion 96a and the mounting piece 96c of the mounting portion 96 and screwed into the female screw portions 93, 93 of the boarding and alighting plate support portions 88, 90, so that the boarding and alighting plates 32A, 32B, and 32C are connected and fixed to the boarding and alighting plate support portions 88, 90. As illustrated in FIG. 2, the fixing portion 120 is provided one by one at the left and right end portions of the three boarding and alighting plates 32A, 32B, and 32C, respectively.

[0030] (3) Detection unit 70 Next, the detection unit 70 will be described with reference to FIGS. 3 and 4.

[0031] The detection unit 70 is provided for each fixing portion 120 provided on the first boarding and alighting plate 32A, the second boarding and alighting plate 32B, and the third boarding and alighting plate 32C. Since they all have the same configuration, in this description, the detection unit 70 that detects the fixing portion 120 provided at the right end portion of the third boarding and alighting plate 32C will be described.

[0032] The detection unit 70 includes, for example, a push plunger type limit switch. When the fixing portion 120 is screwed into the female screw portion 93 of the boarding and alighting plate support portion 88 and the tip end portion of the fixing portion 120 protrudes downward from the boarding and alighting plate support portion 88, the plunger (operating portion) 71 of the detection unit 70 is pressed downward by the tip end portion of the fixing portion 120, and the detection unit 70 is turned on to detect that the boarding and alighting plate 104 is fixed to the truss 12 by the fixing portion 120.

[0033] Also, when the tip end portion of the fixing portion 120 does not protrude downward from the boarding and alighting plate support portion 88 and the plunger 71 of the detection unit 70 is not pressed downward by the tip end portion of the fixing portion 120, the plunger 71 protrudes and the detection unit 70 is turned off, detecting that the boarding and alighting plate 104 is not properly fixed to the truss 12 by the fixing portion 120 (that is, not fixed to the truss 12 or the fixing to the truss 12 is insufficient).

[0034] (4) Electrical Configuration of Escalator 10 Next, the electrical configuration of the escalator 10 will be described with reference to FIG. 5.

[0035] A control device 50 provided in the upper floor machine room 14 is connected to an inverter circuit 52, a power regeneration unit 53, a reactor 54, and a noise filter 55. The three-phase AC power supply supplied from a three-phase AC power supply (not shown) reaches the power regeneration unit 53 through the noise filter 55 and the reactor 54 provided as a countermeasure against high frequency. The power regeneration unit 53 regenerates the energy generated when the escalator 10 is operating in the downward direction into the three-phase AC power supply. The inverter circuit 52 and the electromagnetic brake 23 connected to the power regeneration unit 53 control the driving and stopping of the motor 20 based on a control signal from the control device 50, and change the operating speed and the upward or downward direction.

[0036] In addition, a detection unit 70 provided for each fixing unit 120 that fixes the respective landing plates 32A, 32B, 32C is connected to the control device 50.

[0037] (5) Operations of Detection Unit 70 and Control Device 50 Next, the operations of the detection unit 70 and the control device 50 will be described.

[0038] First, when the maintenance staff is not performing maintenance work on the escalator 10, the upper surfaces of the machine rooms 14 and 16 are blocked by the landing plates 32 and 34, and each of the landing plates 32A, 32B, 32C that constitute the landing plates 32 and 34 is fixed to the truss 12 by the fixing unit 120. In this state, as shown in FIG. 4, the plungers 71 of all the detection units 70 are pressed downward by the tip of the fixing unit 120, and the detection unit 70 detects that all of the upper floor landing plate 32 and the lower floor landing plate 34 are fixed to the truss 12 by the fixing unit 120.

[0039] When the control device 50 detects that all the detection units 70 are in the on state and the upper and lower landing plates 32 and 34 are fixed to the truss 12 by the fixing unit 120, it controls the motor 20 to move the steps 30 between the upper and lower landing openings to transport passengers, and determines that normal operation can be executed.

[0040] When the control device 50 determines that normal operation of the escalator 10 can be executed, if it receives an instruction to start operation from a start switch (not shown) while the steps 30 are stopped, it starts normal operation. Also, during the execution of normal operation, the control device 50 continues to detect the fixing unit 120 by the detection unit 70, and when all the detection units 70 detect the on state, it executes normal operation.

[0041] On the other hand, when a maintenance worker removes the fixing unit 120 that connects and fixes the upper landing plate 32 or the lower landing plate 34 to the truss 12 for maintenance work, at least one of the detection units 70 becomes off, and it detects that at least a part of the upper and lower landing plates 32 and 34 is not fixed to the truss 12 by the fixing unit 120.

[0042] When the control device 50 detects that at least a part of the landing plates 32 and 34 is not fixed to the truss 12 by the fixing unit 120, even if it receives an instruction to start operation from the start switch, it does not start operation and prohibits the execution of normal operation. Also, if the fixing unit 120 comes off for some reason during the normal operation of the escalator 10, it stops the normal operation and stops the escalator 10.

[0043] (6) Effect According to the present embodiment, since the control device 50 prohibits the execution of normal operation when it does not detect that the landing plates 32 and 34 are fixed to the truss 12 by the fixing unit 120, it is possible to detect the danger of the escalator 10 before reaching a dangerous state where the landing plates 32 and 34 fall into the machine rooms 14 and 16.

[0044] (7) Modification example In the above-described embodiment, a push plunger type limit switch is provided as the detection unit 70. However, the present invention is not limited to this, and other types of limit switches may be used. Further, as the detection unit 70, a proximity sensor such as an infrared proximity sensor, an inductive proximity sensor, or a capacitance proximity sensor may be provided to detect the presence or absence of the tip of the fixing portion 120 that protrudes downward from the boarding and alighting plate support portions 88 and 90.

[0045] In the above-described embodiment, the escalator 10 is described as the passenger conveyor. However, instead of this, it may be applied to a moving walkway.

[0046] In the above, one embodiment of the present invention has been described. However, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and its equivalent scope.

Explanation of Reference Numerals

[0047] 1... building, 10... escalator, 12... truss, 14... machine room, 16... machine room, 18... drive device, 20... motor, 30... step, 32... boarding and alighting plate, 32A... first boarding and alighting plate, 32B... second boarding and alighting plate, 32C... third boarding and alighting plate, 34... boarding and alighting plate, 36... railing, 50... control device, 70... detection unit, 74... upper left member, 76... upper right member, 78... lower left member, 80... lower right member, 82... left member, 84... right member, 86... upper horizontal member, 87... lower horizontal member, 88... boarding and alighting plate support portion, 90... boarding and alighting plate support portion, 96... placement portion, 96c... placement piece, 120... fixing portion

Claims

[Claim 1] A truss extending in the front-rear direction; A step that moves in a front-rear direction along the truss; A motor for moving the steps; A control device that controls the motor to perform a normal operation for transporting passengers; A boarding and alighting plate arranged at the boarding and alighting entrance of the truss; A boarding / disembarking plate support portion that supports the boarding / disembarking plate from below; a fixing portion that is inserted into an insertion hole provided in a mounting portion that has a space between the board and the board support portion and that is screwed into a female screw portion provided in the board support portion to fix the board to the truss; a detection unit that detects that the boarding and alighting plate is fixed to the truss by the fixing unit when the fixing unit is screwed into the female threaded portion and a tip end of the fixing unit protrudes downward from the boarding and alighting plate support unit, and an operating unit is pressed downward; Equipped with the fixing portion is inserted into the insertion hole provided in the placement portion and is screwed into the female screw portion provided in the board support portion at a position spaced downward from the board, The control device enables the normal operation when the fixing unit detects that the boarding and alighting board is fixed to the truss, and prohibits the normal operation from being executed when the fixing unit does not detect that the boarding and alighting board is fixed to the truss.

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