JP2013112433A - Passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that when a braking component or the like of a passenger conveyor is maintained or inspected, a thin electric motor provided on a side face of a terminal gear makes it difficult to do maintenance and inspection from a machine room, and then a detachment operation for a step board, balustrade component, or the like is separately required upon maintenance or inspection.SOLUTION: A drive sprocket is driven by a hydraulic motor and a hydraulic pump, an electric motor for a pump, an oil tank, and a change-over control valve which are required for driving the hydraulic motor are housed in the machine room of a frame body. Above all, maintenance and inspection of the change-over control valve can be carried out in the machine room, thereby facilitating the maintenance and inspection thereof.

Description

  The present invention relates to an escalator device that connects each level of a building such as a railway station building or a department store, and a passenger conveyor represented by a movable road used in an airport, etc., and in particular, maintenance of a driving machine that drives a tread board, etc. It is related with the passenger conveyor which improved the property.

  Conventionally, in a passenger conveyor, for example, an escalator device, a driving machine such as an electric motor is installed in a machine room provided on the upper hierarchy side of a pair of hierarchies, and treads and handrails are driven by the driving force generated by the driving machine. It is configured to do. In the following, description will be made based on an example of an escalator device.

  In a generally known escalator device, a drive machine composed of an electric motor or the like is installed in a machine room, and the power from the electric motor is decelerated by a drive side reduction device such as a gear mechanism, and a driven side reduction device is connected via a chain. The terminal spur is further decelerated to obtain the desired drive torque for the drive sprocket.

  These drive-side speed reducers, driven-side speed reducers, and the chain connecting them required maintenance work (hereinafter referred to as maintenance / inspection work) such as ensuring lubricity and adjusting tension by lubrication. In some cases, post-treatment of the lubricating oil that occurs when the oil is added is also necessary.

  Therefore, for the purpose of reducing such maintenance / inspection work as much as possible, as shown in FIG. 4 of JP-T-2000-505406 (Patent Document 1), a terminal gear is directly attached to a terminal gear. A method of directly driving the motor with an electric motor has been proposed. As a result, operations such as ensuring lubricity and adjusting tension by lubrication are omitted.

  Further, as means for transmitting the driving force of the electric motor to the terminal gear, FIGS. 1 to 3 of Japanese Patent No. 4473359 (Patent Document 2) and FIGS. 1 to 3 of Japanese Patent Application Laid-Open No. 2009-274879 (Patent Document 3). As shown in FIG. 1, a method using a gear instead of a chain has been proposed.

Special Table 2000-505406 Japanese Patent No. 4473359 JP 2009-274879 A

  However, in the configuration proposed in Patent Document 1, a thin electric motor is provided on the side surface of the terminal gear, so that an operator can extend his arm from the machine room of the escalator device or go in and out for maintenance and inspection work. There is a problem that the work to be performed is extremely difficult.

  In particular, in this type of device, safety measures are important, and it is important to preferentially perform maintenance and inspection of braking parts that brake the drive sprocket. In Patent Document 1, in order to brake the electric motor, it is necessary to take measures such as fixing a brake disk to the rotating shaft of the electric motor and sandwiching the brake disk with a brake pad to perform braking.

  Therefore, when performing maintenance / inspection work of the escalator device, particularly braking parts, it is difficult to perform maintenance / inspection work from the machine room because the thin motor is provided on the side surface of the terminal gear as described above. For this reason, in the case of such maintenance / inspection work, work procedures such as removing treads and balustrade parts have been separately required.

  In addition, if the tread board and balustrade parts are removed during maintenance / inspection work, it is also necessary to check whether or not these parts are forgotten to be attached at the time of restoration.

  Further, in the proposals in Patent Document 2 and Patent Document 3, the drive machine is arranged in the machine room, but the power transmission between the drive machine and the terminal gear is performed by a gear, so lubrication and lubrication to the gear are performed. There is a problem that maintenance is necessary.

  The objective of this invention is providing the passenger conveyor provided with the novel drive machine which can perform the maintenance operation | work of a drive machine easily.

  A feature of the present invention is that a drive machine that applies a drive force to a drive sprocket, a fluid motor that drives the drive sprocket, a fluid pump that sends a working fluid to the fluid motor, a pump electric motor that drives the fluid pump, and a fluid motor are provided. A fluid tank that collects the actuated fluid, a fluid flow from the fluid pump to the fluid motor, and a switching control valve that controls the flow of the working fluid from the fluid motor to the fluid tank. The electric motor, the fluid tank, and the switching control valve are preferably housed in a space capable of maintenance work such as a machine room of the frame.

  According to the present invention, components that require frequent maintenance work, such as braking parts, can be maintained in the machine room, so that the work efficiency can be improved, the time required for maintenance work can be shortened, and recovery from failure can be achieved. Time can be shortened.

  In addition, since there is no need to remove the tread board and balustrade parts during maintenance work, it is possible to expect an effect that there is no risk of forgetting to attach during restoration.

It is the block diagram which showed the outline of the escalator apparatus as an example of the passenger conveyor which becomes one Example of this invention. FIG. 2 is a hydraulic circuit diagram illustrating an operation state of a hydraulic circuit during normal rotation operation of the drive machine illustrated in FIG. 1. FIG. 2 is a hydraulic circuit diagram illustrating an operation state of a hydraulic circuit during a reverse rotation operation of the drive machine illustrated in FIG. 1. FIG. 2 is a hydraulic circuit diagram illustrating an operation state of a hydraulic circuit when operation of the drive machine illustrated in FIG. 1 is stopped. It is a block diagram which shows the attachment state of the escalator apparatus by which this invention was employ | adopted. It is a block diagram which shows the structure of the conventional escalator apparatus with which this invention is applied.

  Hereinafter, the present invention will be described with reference to the drawings. First, the configuration of an escalator device which is an example of a conventional passenger conveyor targeted by the present invention will be described with reference to FIG. Here, since the present invention mainly relates to a drive machine for an escalator device, other device parts of the escalator device are not changed.

  In this embodiment, the present invention relates to an escalator device which is a kind of passenger conveyor, and its overall configuration is as shown in FIG.

  In this escalator device 1, a large number of footboards 2 are connected endlessly and circulated to transport passengers between an upper floor 3 and a lower floor 4.

  Further, the escalator device 1 is located on both sides in the width direction of the footboard 2, the frame body 5 installed in the building structure, the handrail 6 provided for the safety of passengers and moving in synchronization with the footboard 2. A balustrade 7 is provided which supports the handrail 6 and is erected along the longitudinal direction of the frame body 5 (along the moving direction of the tread plate 2).

  The boarding / exiting floors 8 and 9, the handrail 6, the balustrade 7 and the like are supported by the frame 5, and the building-side boarding gates (specifically, the upper floor boarding / exiting floors 8 and The lower floor getting on and off 9) is fixed. The frame body 5 of the escalator device 1 has an upper horizontal portion, a lower horizontal portion, and an inclined portion 10 that connects between them.

  An upper floor machine room 11 is formed at the end of the upper horizontal portion of the frame body 5 located below the upper floor boarding / exiting floor 8, and a drive machine 12 is installed in the upper floor machine room 11, which is conventionally known. In the escalator device 1, a terminal gear connected by a chain 18 drives a drive sprocket 13. Here, in the conventional escalator device 1, the drive sprocket 13 and the terminal gear are integrally configured, and therefore the drive force is transmitted from the drive machine 12 by driving the terminal gear by the chain 18. Yes.

  Here, the upper-floor machine room 11 is a space that is outside the movement locus of the footboard 2 in which the drive machine 12 is housed and conveys passengers and the like, and is a space in which workers can enter and exit during maintenance / inspection work.

  On the other hand, a driven sprocket 15 is installed in the lower floor machine room 14 in the lower horizontal portion provided on the lower side of the lower floor getting on and off floor 9, and an endless drive chain is provided between the upper and lower drive sprockets 13 and 14. 16 is wound and continuously driven.

  An axle 17 is connected to the drive chain 16 at equal intervals, and each tread plate (step) 2 is attached to the axle 17.

  In such a conventional escalator device 1, as described above, the drive-side speed reducer and the driven-side speed reducer of the drive machine 12 and the chain connecting them are maintained and inspected such as ensuring lubricity by lubricating and adjusting the tension. Work was necessary. In some cases, post-treatment of the lubricating oil that occurs when the oil is added is also necessary.

  And in order to perform this maintenance and inspection work easily, in patent document 1, the thin motor was provided in the side surface of the terminal gear, and work, such as lubrication, was abbreviate | omitted.

  However, in the configuration proposed in Patent Document 1, a thin motor is provided on the side surface of the terminal gear, so that a worker from the machine room 11 of the escalator device 1 can perform maintenance and inspection work such as braking parts of the motor. However, there is a problem that it is extremely difficult to work to extend and enter and exit the arm.

  In other words, in the case of performing maintenance / inspection work of the brake parts of the motor constituting the drive machine of the escalator device 1 in particular, as described above, since the thin motor is provided on the side surface of the terminal gear, maintenance / inspection from the machine room is performed. Inspection work is difficult. For this reason, in such maintenance / inspection work, there has been a problem that work procedures other than the maintenance / inspection work such as removing the tread plate 2 and the balustrade 7 parts are required.

  In order to solve such a problem, the present invention proposes a novel drive machine as described below, and specifically, the drive machine is constituted by a fluid pump and a fluid motor. More specifically, the fluid pump and the fluid motor are a hydraulic pump and a hydraulic motor. However, the present invention is not limited to hydraulic pumps and hydraulic motors that use oil as the working fluid, and fluid pumps and fluid motors that use other than oil as the working fluid may be used.

  In FIG. 1, the drive sprocket 13 is constructed integrally with its own rotating shaft 20, one end of the rotating shaft 20 is rotatably supported by a bearing 21, and the other end is connected to a rotating shaft 22 </ b> A of the hydraulic motor 22. Has been. Here, the rotary shaft 20 and the rotary shaft 22A of the hydraulic motor 22 may be integrated as a single rotary shaft, or the respective rotary shafts may be connected by gears.

  Further, the hydraulic motor 22 is firmly fixed to a part of the frame body 5 using a bolt or the like, so that the rotation of the hydraulic motor 22 can be transmitted to the rotary shaft 20.

  A radial piston motor or the like can be used as the hydraulic motor 22. For example, the pistons are arranged in five cylinders, and the pistons are connected to a rotating shaft configured in a crankshaft shape. Stable rotation can be obtained by feeding the oil. Other than this, a gear motor, a vane motor, or the like can be used.

  Further, a drive unit 23 is provided in the upper floor machine room 11 of the upper floor 3, and in this drive unit 23, as shown in FIG. 2, a hydraulic pump 26 and a pump electric motor 27 for driving the hydraulic pump, A switching control valve 28, an oil tank 29, and the like are incorporated.

  The drive unit 23 is configured as a housing, and a hydraulic pump 26, a pump electric motor 27 for driving the hydraulic pump, a switching control valve 28, an oil tank 29, and the like are collectively stored therein. As a result, the drive unit 23 can be handled as a module, so that it is easy to install and replace.

  The switching control valve 28 of the drive unit 23 and the hydraulic motor 22 are fluidly connected by a passage pipe 24, and the passage pipe 24 is used for oil supply to the hydraulic motor 22 and for return oil 2. A book is being prepared.

  Further, a shutoff valve 25 (25A, 25B) is provided in the middle of the passage pipe 24 so that fluid separation (cutoff of fluid communication) between the hydraulic motor 22 and the switching control valve 28 can be performed. ing. That is, the hydraulic motor 22 and the drive unit 23 can be separated. This shut-off valve 25 (25A, 25B) is also disposed in the upper floor machine room 11.

  Next, a specific configuration of the drive unit 23 will be described in detail with reference to FIG. In FIG. 2, the drive unit 23 is formed in a rectangular parallelepiped housing using an iron plate or the like, and has a hydraulic pump 26, a pump electric motor 27 for driving the hydraulic pump, and an oil path to the hydraulic motor 22. A switching control valve 28 for switching (controlling the flow of the working fluid), an oil tank 29 for storing oil as the working fluid, and the like are housed. The hydraulic pump 26 may have the same configuration as that of the hydraulic motor 22. In this embodiment, the same radial piston motor as that of the hydraulic motor 22 is used, but the present invention is not limited to this.

  Therefore, during maintenance / inspection work, a lid (not shown) constituting the housing of the drive unit 23 is opened, and this lid is opened to open the hydraulic pump 26, the pump motor 27, the switching control valve 28, and the oil tank 29. Perform maintenance / inspection work.

  Here, since the hydraulic motor 22 for driving the drive sprocket 13 is a radial piston motor or the like, the hydraulic motor 22 has a simple configuration, and since it has a relatively large track record of use, there is little need to consider serious failures. is there. Therefore, maintenance and inspection work can be omitted over a considerably long time.

  The switching control valve 28 is functionally provided with a forward passage portion 28A, a reverse passage portion 28B, and a passage blocking portion 28C. Since the switching control valve 28 is a so-called spool type control valve, its position is controlled by the operation mechanism 30 and any one of the forward passage portion 28A, the reverse passage portion 28B, and the passage blocking portion 28C is connected to the passage pipe 24. Can be switched.

  For example, when the operation mechanism 30 is a fluid type, the position of the spool can be changed by the acting force of the fluid, and when the operation mechanism 30 is an electrical proportional electromagnetic mechanism, the amount of electricity that flows to the electromagnetic mechanism, for example, The spool position can be changed by controlling the duty of the pulse current.

  Note that the switching control valve 28 is shown as an example, and other switching methods of the direction of flow of the working fluid in the passage pipe 24 or the control of the cutoff may be adopted. The reverse passage portion 28B and the passage blocking portion 28C may be functionally provided.

  Here, since the switching control valve 28 has a higher probability of failure due to foreign object biting or the like than other devices such as the hydraulic motor 22, the hydraulic pump 26, and the pump motor 27, the priority of maintenance / inspection work is inevitable. Tend to be higher. Therefore, the switching control valve 28 is housed in the drive unit 23 installed in the upper floor machine room 11 so that maintenance and inspection work can be facilitated.

  FIG. 2 shows a hydraulic circuit when the hydraulic motor 22 is operated in the forward direction, and the switching control valve 28 is controlled in a state in which the illustrated forward passage portion 28A is functioning.

  In this state, when the hydraulic pump 26 is rotated and actuated by the rotation of the pump motor 27, the hydraulic pump 26 sucks oil from the oil tank 29, and then switches the oil at a predetermined pressure via the passage pipe 31A. 28 is sent out. At this time, the switching control valve 28 connects the passage piping 31A and the passage piping 24A because the forward passage portion 28A functions.

  When the pressurized oil is sequentially supplied to the cylinder of the hydraulic motor 22 through the passage pipe 24A, the hydraulic motor 22 operates so that the piston disposed in the cylinder moves up and down to rotate the crankshaft. Here, the opening / closing timings of the crankshaft, the intake valve and the discharge valve of each cylinder are related with a predetermined rotation angle so as to obtain an appropriate rotational force. These relationships are well known in the field of hydraulic motor devices.

  The oil used in the hydraulic motor 22 is discharged through the passage pipe 24B. At this time, the forward rotation passage portion 28A of the switching control valve 28 functions. Accordingly, since the passage pipe 24B and the passage pipe 31B are connected, the oil is sent to the oil tank 29 through the passage pipe 24B and the passage pipe 31B and collected.

  By repeating this, the hydraulic motor 22 continues to rotate in the forward direction, and the drive sprocket 13 is driven to drive the drive chain 16.

  On the other hand, if the configuration shown in FIG. 2 is an upward escalator device, the downward escalator device may simply reverse the hydraulic motor 22, and the configuration is shown in FIG.

  FIG. 3 shows a hydraulic circuit in the case where the hydraulic motor 22 is operated in reverse rotation, and the switching control valve 28 is controlled so that the illustrated reverse-rotation passage portion 28B is functioning.

  In this state, when the hydraulic pump 26 is rotated and actuated by the rotation of the pump motor 27, the hydraulic pump 26 sucks oil from the oil tank 29, and then switches the oil at a predetermined pressure via the passage pipe 31A. 28 is sent out. At this time, the switching control valve 28 connects the passage piping 31A and the passage piping 24B because the reverse passage portion 28B functions.

  When the pressurized oil is sequentially supplied to the cylinder of the hydraulic motor 22 through the passage pipe 24B, the piston disposed in the cylinder moves up and down to rotate the crankshaft in the reverse direction to the case of FIG. The hydraulic motor 22 operates.

  The oil used in the hydraulic motor 22 is discharged through the passage piping 24A. At this time, the reverse control passage portion 28B of the switching control valve 28 functions. Accordingly, since the passage pipe 24A and the passage pipe 31B are connected, the oil is sent to the oil tank 29 through the passage pipe 24A and the passage pipe 31B and collected.

  By repeating this, the hydraulic motor 22 continues the reverse rotation in the reverse direction to that shown in FIG. 2, and the drive sprocket 13 is rotated to drive the drive chain 16.

  Next, a case where the escalator device is braked or stopped at night or due to an emergency measure will be described. At the time of such braking or stopping, the supply of power to the pump motor 27 is stopped, and the switching control valve 28 is switched to the passage blocking portion 28C to cut off the supply and recovery of hydraulic oil to the hydraulic motor 22. Thus, the rotation of the drive sprocket 13 is braked.

  FIG. 4 shows a hydraulic circuit when the hydraulic motor 22 is stopped, and the switching control valve 28 is controlled so that the illustrated passage blocker 28C is functioning. When the hydraulic pump 26 is rotated and operated by the rotation of the electric motor 27, the hydraulic pump 26 sucks oil from the oil tank 29, and then sends the oil to the switching control valve 28 through the passage pipe 31A at a predetermined pressure.

  However, when shifting to the braking or stopping operation, the pump motor 27 is stopped, and at this time, the switching control valve 28 is shut off from the passage piping 31A and the passage piping 24A because the passage blocking portion 28C functions. The passage piping 24B and the passage piping 31B are also shut off.

  For this reason, since the passage blocking portion 28C restricts the supply and recovery of oil, the hydraulic motor 22 is prevented from entering and exiting the oil, and the hydraulic motor 22 is forced to stop rotating and has a function as a braking mechanism. .

  Here, if braking and stopping are suddenly applied and a large load is applied to the mechanical system such as the hydraulic motor 22 and the drive sprocket 13 and there is a risk of damage, the required amount of oil is supplied from the return side passage pipe 31B. If the passage blocking portion 28C is configured so as to return to the tank 29 (oil from the hydraulic motor 22 is collected over a predetermined time), the hydraulic motor 22 can be rotated, thereby avoiding the possibility of damage to the mechanical system. become able to.

  In this case, since the stop state of the hydraulic motor 22 cannot be maintained unless the return-side passage pipe 31B is cut off, the passage cut-off is performed so that the return-side passage pipe 31B is completely cut off after a predetermined time has elapsed. The unit 28C is controlled.

  The braking control of the drive sprocket 13 during braking includes an inverter that drives the pump motor 27 in addition to a method of blocking the passage pipe 31A and the passage pipe 24A, and the passage pipe 24B and the passage pipe 31B by the switching control valve 28 described above. The speed of the hydraulic motor 22 can also be controlled by controlling the rotational speed of the hydraulic pump 26 by a device (not shown).

  In this case, after the rotation of the drive sprocket 13 stops, the switching control valve 28 cuts off the passage piping 31A and the passage piping 24A, and the passage piping 24B and the passage piping 31B, so that the hydraulic motor 22 is held in a stopped state. To do.

  As can be seen from the embodiments described above, in the configuration proposed in Patent Document 1, a thin motor is provided on the side surface of the terminal gear, so that a worker from the machine room of the escalator device can perform maintenance and inspection work. However, there is a problem that it is extremely difficult to work to extend and enter and exit the arm.

  However, according to this embodiment, the drive unit 23 includes the hydraulic motor 22 having a low priority for maintenance / inspection work, the switching control valve 28, the hydraulic pump 26, and the pump motor 27 having a high priority for maintenance / inspection work. Since the hydraulic motor 22 and the hydraulic pump 26 are fluidly connected to each other through the passage pipe 24, maintenance and inspection work can be substantially performed in the machine room 11.

  That is, in the case of performing maintenance / inspection work of the escalator device, particularly brake parts, etc., in Patent Document 1, since a thin motor is provided on the side surface of the terminal gear, maintenance / inspection work from the machine room is difficult. In such maintenance / inspection work, there has been a problem that work procedures other than maintenance work such as removing treads and balustrade parts are required.

  On the other hand, in this embodiment, the switching control valve 28, the hydraulic pump 26, and the pump motor 27, which have high priority in maintenance / inspection work, are housed in the drive unit 23 and separated from the hydraulic motor 22. The maintenance / inspection work can be substantially performed in the interior.

  FIG. 5 shows a schematic view of the layout configuration of the machine room of the escalator device. Generally, a space located above the frame body 5 and capable of maintenance work on the edge side of the frame body from the drive sprocket 13 is shown in the upper floor. A space located under the machine room 11 and the frame body 5 and capable of maintenance work on the frame end side of the driven sprocket 15 is defined as a lower floor machine room 14. The machine room can be provided in a space 32 capable of maintenance work provided in a building structure such as the lower side of the upper floor machine room 11 of the frame 5, for example, a space outside the 5.

  Therefore, the maintenance work in an arbitrary frame body such as the upper floor machine room 11 capable of performing these maintenance work, the lower floor machine room 14 capable of maintenance work, and the space 32 under the upper floor machine room 11 capable of maintenance work. The drive unit 23 can be disposed in a machine room or a space where maintenance work can be performed outside the frame, and in this case, the hydraulic motor 22 is fluidly connected to the passage pipe 24. Since the passage pipe 24 can be freely routed, unlike the conventional escalator device 1 as shown in FIG. 6, such a free layout is possible.

  By adopting such a configuration, the drive unit 23 can be provided in a machine room of a frame body at an arbitrary position where maintenance and inspection work is easy or a space outside the frame body, and the drive unit 23 can be provided in a space outside the frame body. If it arrange | positions to, the dimension LH of the upper floor machine room 11 of the frame 5 or the dimension LL of the lower floor machine room 14 can be shortened.

  In recent buildings, it is often required to reduce the dimension LH of the upper floor machine room 11, and by adopting such a configuration, the degree of freedom of layout in the building can be increased.

  In this embodiment, the hydraulic motor 22 drives the upper sprocket (drive sprocket 13), but drives the lower sprocket (the sprocket corresponding to the position of the driven sprocket 15 in FIG. 5). (In this case, the lower floor side is a driving sprocket and the upper floor side is a driven sprocket).

  Further, although oil is used as the working fluid, the present invention can be used even if other working fluids are used, but it is desirable to use oil in consideration of actual use and lubrication.

  The escalator apparatus employing the novel drive machine according to the present embodiment described above can be expected to have the following new effects.

  By providing the drive unit 23 in the machine room 11, maintenance / inspection work of the switching control valve 28 for controlling the hydraulic oil can be handled in the machine room 11, so that maintenance / inspection work is easy.

  Further, when a large-scale repair is required, the drive unit 23 and the hydraulic motor 22 can be easily separated from each other by the shutoff valve 25, so that quick recovery is possible. That is, since the drive unit 23 is disposed in the machine room 11, maintenance / inspection work of the drive unit 23 can be easily performed in the maintenance / inspection space of the machine room 11.

  During maintenance / inspection work, the work of removing the tread board 2, the balustrade 7 and the like becomes unnecessary.

  Since the drive unit 23 is housed in the machine room, the components of the drive unit 23 can be easily replaced, and quick replacement work for a failure accident or the like is possible.

  Further, since the chain 18 which is necessary for the conventional escalator device is omitted, it is not necessary to lubricate the chain 18 or adjust the tension.

  As described above, according to the present invention, components that require frequent maintenance / inspection work, such as braking parts, can be maintained / inspected in the machine room. It is possible to reduce the time required for inspection work and the recovery time in the event of a failure.

  In addition, since there is no need to remove the tread board and balustrade parts during maintenance / inspection work, it is possible to expect the effect that there is no risk of forgetting to attach during restoration.

  DESCRIPTION OF SYMBOLS 1 ... Escalator apparatus, 2 ... Footboard, 3 ... Upper floor, 4 ... Lower floor, 5 ... Frame, 6 ... Hand rail, 7 ... Railing, 8, 9 ... Boarding / exiting floor, 10 ... Inclined part, 11 ... Up Floor machine room, 12 ... Drive machine, 13 ... Drive sprocket, 14 ... Lower floor machine room, 15 ... Drive sprocket, 16 ... Drive chain, 17 ... Axle, 18 ... Chain, 20 ... Rotating shaft, 21 ... Bearing, 22 ... Hydraulic motor, 23 ... drive unit, 24, 24A, 24B ... passage piping, 25, 25A, 25B ... shut-off valve, 26 ... hydraulic pump, 27 ... electric motor for pump, 28 ... switching control valve, 28A ... forward passage section, 28B ... Reverse passage part, 28C ... Passage blocking part, 29 ... Oil tank, 30 ... Operation mechanism, 31A, 31B ... Passage piping.

Claims (8)

A frame installed in a building structure; drive sprockets and driven sprockets provided at both longitudinal ends of the frame; an endless drive chain that rotatably connects the driven sprockets by the drive sprockets; In a passenger conveyor provided with a tread plate that is driven and circulated by the drive chain, and a drive machine that applies drive force to the drive sprocket,
The drive machine includes a fluid motor that drives the drive sprocket, a fluid pump that sends a working fluid to the fluid motor, a pump motor that drives the fluid pump, and a fluid that collects fluid that has actuated the fluid motor. A tank, and a switching control valve that controls a flow of fluid from the fluid pump to the fluid motor and a flow of working fluid from the fluid motor to the fluid tank, the fluid pump, the pump motor, The fluid tank and the switching control valve are installed in a machine room capable of maintenance work on the frame body end side of the drive sprocket in the frame body or in a space capable of maintenance work provided in the building structure outside the frame body. Passenger conveyor characterized by storing. In the passenger conveyor according to claim 1,
The passenger conveyor, wherein the working fluid is oil, the fluid motor is a hydraulic motor, and the fluid pump is a hydraulic pump. In the passenger conveyor according to claim 2,
The hydraulic motor and the switching control valve are fluidly connected by a passage pipe for oil feeding that sends oil to the hydraulic motor and a passage pipe for return oil that collects oil from the hydraulic motor, and A passenger conveyor characterized in that an oil supply passage pipe and a return oil passage pipe are provided with shut-off valves for shutting off fluid communication between the hydraulic motor and the switching control valve. In the passenger conveyor according to claim 2 or 3,
The passenger conveyor, wherein the hydraulic motor is a radial piston motor, and the hydraulic pump is a radial piston pump. In the passenger conveyor in any one of Claim 2 to 4,
The frame body connects a lower floor and an upper floor of the building structure, the drive sprocket is provided on the frame body on the upper floor side, and an end portion of the frame body on the upper floor side A passenger conveyor characterized in that the hydraulic pump, the pump motor, the fluid tank, and the switching control valve are housed in the machine room formed in the above. In the passenger conveyor according to claim 5,
A passenger conveyor characterized in that a rotating shaft of the drive sprocket is integrally formed with a rotating shaft of the hydraulic motor. In the passenger conveyor according to claim 5 or 6,
The passenger conveyor, wherein the hydraulic pump, the pump motor, the fluid tank, and the switching control valve are collectively stored in a housing and disposed in a machine room in the frame. In the passenger conveyor according to claim 3,
When stopping the hydraulic motor, the switching control valve collects the oil from the hydraulic motor collected in the fluid tank from the return oil passage pipe over a predetermined time, and then sets the return oil passage pipe. Passenger conveyor characterized by blocking.

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