JP2019142664A - Chain oil supply device for passenger conveyor - Google Patents

Abstract

To supply oil to an appropriate point in an appropriate oil supply period in a chain oil supply device for a passenger conveyor.SOLUTION: A chain oil supply device 60 for an escalator comprises: an oil tank 62 storing lubricant oil supplied to a chain in which a plurality of link members are endlessly coupled by a plurality of coupling parts; and a pump 64 that pumps the lubricant oil in the oil tank 62. The device also comprises an oil supply control unit 66 that pumps the lubricant oil from the pump 64 during a pumping period. The device further comprises: an oil supply pipe 70 that guides the lubricant oil from the pump 64 to a position directly above the chain; and a sensor unit that detects that each coupling part of the chain has moved directly below a discharge opening, and outputs a detection signal. Furthermore, the device comprises an electromagnetic valve provided at a certain point in an oil supply path for the oil supply pipe 70, receives the detection signal from the sensor unit to open the oil supply path, and discharges the lubricant oil from the discharge opening in a discharging period.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a chain fueling device for passenger conveyors.

  Passenger conveyors, such as escalators and moving walkways, are user transport devices that transport a user on a plurality of steps that move along a moving path provided between one boarding gate and the other boarding gate. A handrail that moves in synchronization with the movement of the steps is provided on the railings provided on both sides of the movement path, that is, on both sides of the plurality of steps. The passenger conveyor is provided with a step drive chain that is driven to move in an endless loop along the movement path for the movement of the step, a handrail drive chain that is driven to move in an endless loop for the movement of the moving handrail, etc. It is done.

  In Patent Document 1, as an oil supply device that supplies oil to an escalator chain, an oil tank that contains lubricating oil, a pump that pumps up the lubricating oil in the oil tank, a motor that drives the pump, and a lubricant that is discharged from the pump An oil supply pipe that guides oil to the top of the chain is described.

  Patent Document 2 discloses that a high-performance oil is used as an automatic oil supply device for an escalator chain, and the conventional oil supply to the chain is approximately 480 hours for about 3 minutes with a period of 48 hours (2 days). A controller that extends to about 3 minutes of refueling with a period of

JP 2016-113256 A JP 2006-131351 A

  In the prior art, lubrication to the various chains of the passenger conveyor is, for example, with a predetermined discharge period of several days, etc., and during a predetermined discharge period of several minutes, the lubricating oil is supplied from the pump to the various chains. Discharged. Since the lubricating oil is continuously discharged during the discharge period, in some cases, excessive oil supply occurs, and the oil flows out to the outside, and the truss or the like on which the chain is disposed may be soiled. In the chain, the outer link and the inner link are alternately connected along the longitudinal direction, and the bush and pin portions at the connecting portion are appropriate as the discharge destination of the lubricating oil. Other than the bush and pin portions Even if lubricating oil is discharged, proper lubrication is not possible. If lubrication is not performed at an appropriate location, the chain will be worn. If the lubrication is uneven, problems such as uneven chain elongation may occur, and in some cases, the chain may be broken. Therefore, there is a demand for a chain lubrication device for a passenger conveyor that enables lubrication to an appropriate location in an appropriate discharge period.

  A chain oil supply device for a passenger conveyor according to the present disclosure is a chain oil supply device for a passenger conveyor that supplies lubricating oil to a chain in which a plurality of link members are connected endlessly at a plurality of connecting portions. Oil tank to be stored, pump for pumping up lubricating oil in the oil tank, oil supply control unit for pumping up lubricating oil from the pump only for a predetermined pumping period repeated at a predetermined pumping cycle, and lubricating oil pumped up from the pump An oil supply pipe having a discharge port at the tip, a sensor section for detecting that the chain has moved in the longitudinal direction and the connecting portion has moved directly below the discharge port, and a detection signal is output; The oil supply path is opened in the predetermined discharge period when the detection signal is received from the sensor unit within the pumping period. Comprising a solenoid valve for discharging the lubricating oil from the outlet, a.

  According to the above configuration, the solenoid valve is provided in the middle of the oil supply pipe, and the oil supply path is opened in a predetermined discharge period when the chain moves in the longitudinal direction within the pumping period and the connecting portion moves directly below the discharge port. . Thereby, it is possible to supply oil to the connecting portion in a discharge period shorter than the pumping period, to supply oil to an appropriate part in an appropriate discharge period, and to prevent the oil from flowing out to the outside due to excessive oil supply.

  In the chain lubrication device for a passenger conveyor according to the present disclosure, the chain includes an inner link in which both ends of a pair of front and rear bushes on which rollers are extrapolated are coupled to a pair of left and right inner plates, and a front and rear passage through the bush. Outer links in which both ends of a pair of pins are coupled to a pair of left and right outer plates are alternately connected in the longitudinal direction of the chain to form a pair of front and rear connecting portions, and the discharge port is an inner link in the connecting portion It is preferable that the region where the bush is exposed in the gap between the outer link and the outer link is the lubricating oil discharge target region, and is arranged directly above the movement locus of the discharge target region when the chain moves.

  According to the above configuration, the discharge port of the oil supply pipe is arranged on the movement locus of the discharge target area where the bush is exposed in the gap between the inner link and the outer link. Since the lubricating oil permeates into the gap between the inner link and the outer link and the gap between the bush and the pin by the capillary action, it is possible to appropriately supply the entire connecting portion of the chain with a small amount of oil supply.

  In the chain oil supply device for a passenger conveyor according to the present disclosure, the arrangement pitch along the longitudinal direction of the pair of front and rear rollers is a chain pitch, the mesh is engaged between the pair of front and rear rollers, and the circumferential pitch corresponds to the chain pitch. A sprocket body including a sprocket body having a plurality of teeth arranged in the circumferential direction and a sprocket rotating shaft that rotatably supports the sprocket body, and the sensor part includes two adjacent tooth parts of the sprocket body It is a meshing detection sensor that detects meshing with one connecting portion of the chain and outputs a meshing detection signal, and the solenoid valve lubricates in the discharge period when receiving the meshing detection signal output from the meshing detection sensor It is preferable to open the path.

  According to the above configuration, two adjacent tooth portions of the sprocket body are one of the chains as a sensor portion that detects that the chain has moved in the longitudinal direction and the connecting portion has moved directly below the discharge port and outputs a detection signal. A meshing detection sensor for detecting meshing with the two connecting portions is used. As a result, the mesh detection signal for opening the solenoid valve is output for each chain pitch corresponding to the circumferential pitch of the sprocket body, or for each integer multiple of the chain pitch, and appropriate lubrication is performed for each connecting portion of the chain. Can do.

  In the chain oil supply device for a passenger conveyor according to the present disclosure, the solenoid valve is preferably fixed to the sprocket rotation shaft.

  According to the above configuration, since the electromagnetic valve is fixed to the sprocket rotating shaft around which the sprocket body rotates, the sprocket portion and the electromagnetic valve can be integrated to achieve a small configuration.

  In the chain oil supply device for a passenger conveyor according to the present disclosure, the oil supply pipe is composed of a plurality of branch pipes spaced apart from each other at a chain pitch along the longitudinal direction of the chain, and the electromagnetic valve is a plurality of branch pipes It is preferable that each is provided.

  Depending on the specifications of the passenger conveyor, the moving speed of the chain may be high and the opening / closing cycle of the solenoid valve may be too short. According to the above configuration, for example, if eight branch pipes are configured, electromagnetic valves are provided in the respective branch pipes, and these solenoid valves are opened based on one meshing detection signal, eight electromagnetic valves are provided. The valves can be opened simultaneously, and oil can be supplied to the eight connecting parts of the chain at the same time. Thus, the next eight solenoid valves are opened after the chain has moved by the length of the eight connecting portions. In this way, the opening / closing cycle of the solenoid valve can be extended.

  According to the chain oil supply device for a passenger conveyor having the above-described configuration, it is possible to supply oil to an appropriate location in an appropriate discharge period.

It is a figure which shows the structure of the chain oil supply apparatus of the passenger conveyor in embodiment. It is an enlarged view of a chain. Fig.2 (a) is a top view and shows sectional drawing of a connection part in B part. (B) is the enlarged view of the B section of Drawing 2 (a). It is an enlarged view of the III section of FIG. FIG. 4 is a side view of FIG. 3. It is a figure which shows the relationship between the pumping up period by the pump of lubricating oil, and the discharge period from a discharge outlet. It is a figure which shows the modification which isolate | separated and separated the solenoid valve from the sprocket part with respect to FIG. As an application example of FIG. 6, the oil supply pipe is separated in the longitudinal direction of the chain and has a plurality of branch pipe discharge ports, and a plurality of electromagnetic valves are arranged corresponding thereto.

  Embodiments according to the present disclosure will be described below in detail with reference to the drawings. In the following, an escalator will be described as a passenger conveyor, but this is an illustrative example, and it is used for a plurality of steps that move along a moving path provided between one boarding gate and the other boarding gate. What is necessary is just a user conveyance apparatus which carries a person on board. For example, it may be a moving sidewalk. The shape, dimensions, material, the location of the discharge port of the oil supply pipe, the number of teeth of the sprocket body, etc. described below are examples for explanation, and may be changed appropriately according to the specifications of the escalator chain oil supply device. Is possible. Below, the same code | symbol is attached | subjected to the same element in all the drawings, and the overlapping description is abbreviate | omitted.

  FIG. 1 is a diagram showing a structure of an escalator 10 provided with an escalator chain oil supply device 60. Hereinafter, unless otherwise specified, the escalator chain oil supply device 60 is referred to as a chain oil supply device 60.

  The escalator 10 is a passenger conveyor that carries a user on a plurality of steps 16 that move between the entrance 12 on the upper floor of the building and the entrance 14 on the lower floor. A balustrade 18 and a moving handrail 20 are arranged on the side where the user rides in the building, that is, on the side of the moving passage connecting the upper floor and the lower floor, and the railing 18 and the moving handrail 20 are arranged. Is provided with a truss 22.

  FIG. 1 shows three directions orthogonal to the escalator 10. The vertical direction is the vertical direction of the building, the upper side is the direction of the upper floor, and the lower side is the direction of the lower floor. The longitudinal direction is a direction parallel to the direction in which the movement path of the escalator 10 extends and is parallel to the traveling direction of the escalator 10. The width direction is a direction parallel to the width direction of the movement path of the escalator 10. When distinguishing both sides in the width direction, the right direction is the right side and the left direction is the left side as viewed from the lower floor side to the upper floor side. The same applies to the following drawings. 1 corresponds to a cross-sectional view seen from the right side in the width direction.

  The step 16 is also called a step, and is a moving stage for carrying a user that is attached to a plurality of endless loop-like step chains 40. The balustrade 18 is a fixed panel that is provided on both sides of the moving path of the escalator 10, that is, on both sides of the plurality of steps 16, and has a function of holding the moving handrail 20 movably while ensuring the safety of the user. The moving handrail 20 is a handrail gripped by a user on the step 16, is slidably held on the upper part of the balustrade 18, and moves as the step 16 moves. The truss 22 is a part of the structure of the building on the back side of the moving passage, and a moving mechanism for the steps 16 and a moving mechanism for the moving handrail 20 are arranged. The truss 22 is composed of an upper floor side horizontal portion, a lower floor side horizontal portion, and an inclined portion that connects between them.

  The space on the upper floor side horizontal portion of the truss 22 is called a machine room 24, and a drive motor 26 is installed as an escalator drive device. The drive motor 26 is an electric motor whose operation is controlled by an escalator control device (not shown). As the drive motor 26, a 200V drive three-phase motor is used. Instead of this, a DC motor may be used. As a power transmission mechanism for transmitting the power output from the drive motor 26 to the various drive units of the escalator 10, a combination of a chain and a sprocket unit meshing with the chain is used. Details of the structure of the chain and sprocket will be described later. Since the various chain and various sprocket units and the chain oil supply device 60 for supplying oil to the various chains are all arranged in the truss 22, the arrangement relationship will be described below.

  In the machine chamber 24, a motor-side sprocket portion 28 is attached to the output shaft of the drive motor 26. A drive sprocket portion 30 is disposed in the space on the upper floor side horizontal portion of the truss 22, and a driven sprocket portion 31 is disposed in the space on the lower floor side of the truss 22. The drive sprocket part 30 and the driven sprocket part 31 are supported rotatably with respect to the left and right wall surfaces of the truss 22. The drive sprocket portion 30 is a three-stage coaxial sprocket portion in which a large-diameter drive sprocket body 32, a medium-diameter drive sprocket body 34, and a small-diameter drive sprocket body 36 are arranged coaxially. Both ends of the support shaft of the drive sprocket unit 30 are rotatably fixed to the left and right wall surfaces of the truss 22, and the three coaxial sprocket bodies are fixed to the support shaft and rotate simultaneously. An endless drive chain 38 is stretched between the sprocket body of the motor-side sprocket portion 28 of the drive motor 26 and the large-diameter drive sprocket body 32. An endless step chain 40 for moving and driving the step 16 is suspended between the medium-diameter drive sprocket body 34 and the sprocket body of the driven sprocket portion 31.

  A handrail movement drive unit 42 for moving and driving the moving handrail 20 in synchronization with the movement drive of the step 16 is disposed on the inclined portion of the truss 22. The handrail movement drive unit 42 includes a plurality of handrail drive sprocket units 44 for directly moving and driving the movable handrail 20 and an intermediate sprocket unit 46 that receives the power of the drive motor 26. The intermediate sprocket portion 46 is a two-stage coaxial sprocket in which a large-diameter intermediate sprocket body 48 and a small-diameter intermediate sprocket body 50 are arranged coaxially. An endless handrail main chain 52 is suspended between the large-diameter intermediate sprocket body 48 and the small-diameter drive sprocket body 36 of the drive sprocket portion 30. An endless handrail drive chain 54 is spanned between the small-diameter intermediate sprocket body 50 and the sprocket bodies of the plurality of handrail drive sprocket portions 44. The first idler sprocket portion 56 and the second idler sprocket portion 57 are provided for adjusting the tension of the handrail main chain 52, and the third idler sprocket portion 58 is provided for adjusting the tension of the handrail drive chain 54. .

  In FIG. 1, the black arrow attached to each chain indicates the moving direction of each chain when the step 16 is driven to move from the lower floor side to the upper floor side.

  The chain oil supply device 60 includes an oil tank 62 that contains lubricating oil for various chains, a pump 64 that pumps up the lubricating oil in the oil tank 62, an oil supply control unit 66 that controls the pumping operation of the pump 64, and a solenoid valve 90 ( 3).

  The oil supply control unit 66 pumps the lubricating oil from the pump 64 only during a predetermined pumping period t0 at every predetermined pumping cycle T0 (see FIG. 5). The pumping cycle T0 and the pumping period t0 can be determined in advance by the model of the escalator 10, the performance of the lubricating oil, the specifications of the chain oil supply device 60, and the like. As an example, the pumping cycle T0 is about every 6 hours as measured by the cumulative operation time of the escalator 10, and the pumping period t0 is about 2-3 minutes. In the case of the escalator 10 that is continuously operated for 24 hours, the control is performed to pump up the lubricating oil four times every six hours a day for about 2-3 minutes each time. This is an illustrative example, and other pumping cycles T0 and pumping periods t0 may be used.

  The distributor 68 is a container that distributes the lubricating oil pumped up by the pump 64 so as to evenly flow to the plurality of oil supply pipes 70. One end of each of the plurality of oil supply pipes 70 is connected to the distributor 68, and the other end is a pipe disposed right above a different chain. The other end is provided with a discharge port 78 (see FIG. 3) for discharging lubricating oil toward the chain. In the example of FIG. 1, as the plurality of oil supply pipes 70, an oil supply pipe toward the step chain 40, an oil supply pipe toward the handrail main chain 52, and an oil supply pipe toward the handrail drive chain 54 are shown. This is an exemplification, and an oil supply pipe 70 directed to another chain may be provided.

  The solenoid valve 90 is a valve that is provided in the middle of the oil supply path from the distributor 68 to the discharge port 78 for the plurality of oil supply pipes 70 and opens and closes the oil supply path within the pumping period t0. Lubricating oil is discharged from the discharge port 78 toward the chain only during the discharge period t2 when the electromagnetic valve 90 is opened. The relationship between the pumping period t0 of the pump 64 and the discharge period t2 will be described later.

  The step chain 40, the handrail main chain 52, and the handrail drive chain 54 in FIG. 1 all have the same configuration as the chain, and a plurality of link members are connected endlessly at a plurality of connecting portions. Therefore, the handrail main chain 52 will be described below. FIG. 2 is a configuration diagram of a part of the endless handrail main chain 52. Fig.2 (a) is a top view of the handrail main chain 52, and shows sectional drawing about the connection part 100 connected to B part endlessly. FIG.2 (b) is an enlarged view of the B section of (a).

  In order to form the handrail main chain 52, the outer link and the inner link, which are link members, are connected by the connecting portion 100, and this is repeated to form an endless chain.

  The outer link is formed by connecting two outer plates 102 and 103 with two pins 106. As a coupling method, both ends of the pin 106 and the outer plates 102 and 103 are caulked using an appropriate caulking jig.

  The inner link is formed by connecting two inner plates 104 and 105 with two bushes 108. Two annular rollers 110 are extrapolated to the two bushes 108 in advance. The inner diameter hole of the annular roller 110 is larger than the outer diameter of the bush 108, and the annular roller 110 can rotate around the bush 108. The outer diameter of the annular roller 110 is set smaller than the width dimension of the inner plates 104 and 105. The axial length of the annular roller 110 is set to be shorter than the interval between the two inner plates 104 and 105 facing each other at the inner link formed by connecting the two inner plates 104 and 105 with the two bushes 108. Is done. As a method of connecting the two inner plates 104 and 105 to the two bushes 108, press-fitting or caulking can be used.

  As shown in part B, the connecting part 100 that connects the inner link and the outer link is assembled with the bush 108 and the pin 106 coaxially and connected endlessly along the longitudinal direction of the outer link and the inner link. Part. The inner diameter of the bush 108 is larger than the outer diameter of the pin 106, and the bush 108 can rotate around the pin 106. The interval between the connecting portions 100 adjacent to each other in the longitudinal direction of the handrail main chain 52 connected endlessly is a chain pitch P. When viewed from the outside, the connecting portion 100 is a portion of the roller 110, so that the arrangement pitch along the longitudinal direction of the pair of front and rear rollers 110 of the handrail main chain 52 is the chain pitch P.

  When the handrail main chain 52 is driven, the bush 108 and the pin 106 that are assembled coaxially can come into contact with each other. Therefore, in order to reduce contact resistance and suppress wear due to contact, the bush 108 and the pin 106 Between them, lubricating oil must be supplied. The place where lubrication oil needs to be supplied is between the inner peripheral surface of the bush 108 and the outer peripheral surface of the pin 106 where the bush 108 and the pin 106 can come into contact with each other. The locations where the inner peripheral surface of the bush 108 and the outer peripheral surface of the pin 106 are exposed in the handrail main chain 52 are a region 112 sandwiched between the outer plate 102 and the inner plate 104, and a region sandwiched between the outer plate 103 and the inner plate 105. There are two places 113. If the lubricating oil is dripped onto the region 112 or the region 113, the lubricating oil spreads between the inner peripheral surface of the bush 108 and the outer peripheral surface of the pin 106 by capillary action, and is necessary for suppressing wear due to contact. Refueling can be performed. Therefore, the lubricating oil discharge target area is the area 112 or the area 113. The discharge port 78 at the tip of the oil supply pipe 70 is not located at the center position in the width direction of the handrail main chain 52 but directly above the movement locus of the discharge target area when the handrail main chain 52 moves at the end in the width direction. Placed in. Hereinafter, as illustrated in FIG. 4, the discharge port 78 is assumed to be disposed immediately above the region 112.

  The relationship between the oil supply pipe 70, the discharge port 78, and the electromagnetic valve 90 on the downstream side from the distributor 68 is the same in all of the plurality of oil supply pipes 70. The oil supply pipe 70 extending upward will be described. As shown in FIG. 1, the oil supply pipe 70 extends to the first idler sprocket portion 56. FIGS. 3 and 4 are diagrams illustrating a configuration in which lubricating oil is supplied to the region 112 of the handrail main chain 52 in the first idler sprocket portion 56. 3 is an enlarged view of a portion III in FIG. 1, and FIG. 4 is a side view corresponding to FIG.

The first idler sprocket portion 56 includes a sprocket body 80 and a sprocket rotating shaft 82 that rotatably supports the sprocket body 80. The sprocket body 80 has a plurality of tooth portions 84 arranged on the outer peripheral side at a circumferential pitch θ _P along the circumferential direction, and a substantially arc-shaped root portion 85 between adjacent tooth portions 84. It is a board. Furthermore, the sprocket body 80 has a small-diameter boss portion 86 having a through hole at the center. A sprocket rotating shaft 82 is fitted into the through hole of the small diameter boss portion 86 through a bearing 87. One end side of the sprocket rotating shaft 82 is fixed to the truss 22, and the sprocket body 80 is rotatably supported on the other end side.

In the example of FIG. 3, the total number of the tooth portions 84 of the sprocket body 80 is eight, and the circumferential pitch θ _P is 45 degrees with the expected angle seen from the sprocket rotating shaft 82. The tip shape of the tooth portion 84 is set to a size that can enter the space between the adjacent rollers 110 in the handrail main chain 52, and the substantially arcuate shape of the root portion 85 is outside the connecting portion 100 of the handrail main chain 52. It is set to a size that sandwiches the outer diameter of the roller 110 that is the diameter. When the handrail main chain 52 moves in the direction of the arrow shown as “movement direction”, two adjacent tooth portions 84 of the sprocket body 80 mesh with one connecting portion 100 of the handrail main chain 52. Then, the sprocket body 80 rotates around the sprocket rotation shaft 82 in the direction indicated by the circular arc arrow in FIG. Each time the handrail main chain 52 moves along the longitudinal direction by the chain pitch P, the sprocket body 80 rotates around the sprocket rotation shaft 82 by a circumferential pitch θ _P = 45 degrees. In other words, eight tooth portions 84 are arranged along the circumferential direction of the sprocket body 80 at a circumferential pitch θ _P corresponding to the chain pitch P.

  The magnetic small piece 88 attached to the sprocket body 80 is used to detect the rotational position of the sprocket body 80. In the example of FIG. 3, corresponding to each of the plurality of substantially arc-shaped root portions 85 in the sprocket body 80, the eight small pieces 88 of the magnetic body are circumferentially oriented at every 45 degrees at an expected angle viewed from the sprocket rotation shaft 82. Affixed along. As the magnetic small piece 88, a circular iron plate is used.

The mesh detection sensor 92 is a non-contact sensor unit that detects the rotational position of the sprocket body 80 with respect to the sprocket rotation shaft 82. As the non-contact sensor, a magnetic sensor that detects the presence or absence of a magnetic material is used. The mesh detection sensor 92 is attached to a mounting portion 94 extending from the sprocket rotation shaft 82 and is disposed at a position directly below the axial center position of the sprocket rotation shaft 82 along the vertical direction. The mesh detection sensor 92 detects the presence or absence of a small magnetic piece 88 attached to the sprocket body 80. The small pieces 88 of magnetic material are stuck along the circumferential direction of the sprocket body 80 every 45 degrees at an estimated angle viewed from the sprocket rotating shaft 82, so that the meshing detection sensor 92 rotates around the rotational position of the sprocket body 80. Direction pitch θ _P = detected in units of 45 degrees.

  As the non-contact type sensor unit, an optical sensor that detects the presence or absence of a reflecting plate may be used instead of the magnetic sensor. Or the sensor of the system which detects the electrostatic capacitance according to the magnitude | size of a space | gap can also be used.

  The non-contact type sensor unit that detects the rotational position of the sprocket body 80 is referred to as a mesh detection sensor 92. The main part 52 of the handrail moves in the longitudinal direction and the connecting part 100 has two adjacent teeth of the sprocket body 80. This is because the engagement with the portion 84 is detected. That is, the position along the longitudinal direction of the connecting portion 100 when the connecting portion 100 meshes with two adjacent tooth portions 84 along the circumferential direction of the sprocket body 80 is the two adjacent tooth portions 84 of the sprocket body 80. In the middle position of the sprocket rotary shaft 82. A small piece 88 of magnetic material is disposed at a position intermediate between the two tooth portions 84 of the sprocket body 80. Therefore, when the connecting portion 100 meshes with two adjacent tooth portions 84 along the circumferential direction of the sprocket body 80, the magnetic small piece 88 is directly below the center of the sprocket rotation shaft 82 along with the rotation of the sprocket body 80. Has come to the position. Therefore, a non-contact sensor unit for detecting the magnetic small piece 88 is disposed at a position directly below the axis of the sprocket rotating shaft 82. As a result, the non-contact sensor unit detects that the connecting unit 100 is engaged with two teeth 84 adjacent to each other along the circumferential direction of the sprocket body 80, and outputs a mesh detection signal. Therefore, the non-contact type sensor unit can be referred to as a mesh detection sensor 92.

  The mesh detection signal output by the mesh detection sensor 92 is a signal indicating that the connecting portion 100 is meshed with two teeth 84 adjacent to each other along the circumferential direction of the sprocket body 80, and is therefore used as the oil supply pipe 70. It can be used as a control signal for discharging lubricating oil from the discharge port 78 at the tip of the nozzle. This will be described below with reference to FIG.

  In FIG. 3, the oil supply pipe 70 extends from the distributor 68 along the handrail main chain 52, changes its direction directly above the first idler sprocket portion 56, and extends directly below. Specifically, it extends downward along the vertical direction passing through the center of the sprocket rotating shaft 82. As a result, the discharge port 78 at the tip of the oil supply pipe 70 and the engagement detection sensor 92 are arranged coaxially along the vertical direction. Since the discharge port 78 is disposed on the movement trajectory of the region 112 that is the discharge target region of the connecting portion 100, the mesh detection sensor 92 causes the handrail main chain 52 to move in the longitudinal direction and the region 112 of the connecting portion 100. Detects that it has moved directly below the discharge port 78 and outputs a detection signal. The mesh detection signal detected by the mesh detection sensor 92 is a pulse signal having a pulse width t1. The meshing detection signal is transmitted to an electromagnetic valve 90 provided at a position in the middle of the oil supply path of the oil supply pipe 70 via an appropriate signal line 93. The solenoid valve 90 has an open / close control circuit inside, and is normally closed. When the mesh detection signal is received within the range of the pumping period t0, the solenoid valve 90 is used as a discharge control signal, opens the oil supply path, and is predetermined. The lubricating oil is discharged from the discharge port 78 during the discharge period t2.

  3 and 4, the electromagnetic valve 90 is provided at the position of the shaft end surface of the sprocket rotation shaft 82 in the oil supply pipe 70 and is fixed to the end surface of the sprocket rotation shaft 82. As the fixing method, screwing or the like can be used. Thereby, the 1st idler sprocket part 56 and the solenoid valve 90 become united, and it can be made a small structure.

As described above, the mesh detection sensor 92 is used as a sensor unit that detects that the handrail main chain 52 has moved in the longitudinal direction and the region 112 that is the discharge target region of the connecting unit 100 has moved directly below the discharge port 78. Use. The mesh detection sensor 92 detects that two adjacent tooth portions 84 of the sprocket body 80 mesh with one connecting portion 100 of the handrail main chain 52 and outputs a mesh detection signal. As a result, the mesh detection signal for opening the electromagnetic valve 90 is a chain pitch P corresponding to the circumferential pitch θ _P of the sprocket body 80 in accordance with the number of magnetic pieces 88 to be affixed to the sprocket body 80. Or every integer multiple of the chain pitch P. In this way, it is possible to appropriately supply oil to each connecting portion 100 of the handrail main chain 52.

  FIG. 5 shows the pumping cycle T0 and pumping period t0 controlled by the oil supply control unit 66 for the pump 64, the pulse width t1 of the mesh detection signal output from the mesh detection sensor 92, and the time when the solenoid valve 90 is open. It is a figure which shows the relationship of the discharge period t2 of the lubricating oil which is. In each time chart shown in FIG. 5, the horizontal axis is time.

  FIG. 5A is a diagram showing a pumping cycle T0 and a pumping period t0 in 24 hours a day. Here, an example is shown in which the pumping period t0, which is the pulse width of the pumping signal output from the oil supply control unit 66, is 2 min, and the pumping cycle T0, which is the pumping signal output period, is 6 h.

  FIG. 5 (b) is a diagram showing the pumping period t0 of one pumping signal in FIG. 5 (a) by enlarging the scale of the time axis, and FIG. 5 (c) shows the time axis with FIG. 5 (b). It is a figure which shows the meshing detection signal which the meshing detection sensor 92 outputs on the same scale. The moving speed of the handrail main chain 52 is about 10 cm / s to about 100 cm / s. When the chain pitch P is about 2 cm, the main rail 52 moves at a speed of the chain pitch (5 to 50) per second. Since the number of teeth of the first idler sprocket portion 56 is 8, and the mesh detection sensor 92 outputs once every 8 chain pitches, the mesh detection signal output interval is about (0.16 to 1.6). s, which is considerably shorter than the pumping period t0 = 2 min. The mesh detection signal continues to be output at this output interval while the escalator 10 is in operation, regardless of the pumping period t0.

FIG. 5D is a diagram showing the meshing detection signal sequence in FIG. 5C by enlarging the scale of the time axis as compared with FIGS. 5B and 5C. The mesh detection signal is a pulse signal that is output every pitch time t _P required for the handrail main chain 52 to move by the chain pitch P and has a pulse width t1. The pulse width t1 is determined by the size of the magnetic small piece 88, the detection width of the engagement detection sensor 92, and the like.

  FIG. 5 (e) expands the scale of the time axis more than FIG. 5 (d), and the pulse width t1 of the mesh detection signal in FIG. 5 (d) and the time for the electromagnetic valve 90 in the open state are for lubrication. It is a figure which shows the relationship with the discharge period t2 of oil. The reason why t2 is determined in the time range of t1 depends on the function of the open / close control circuit of the electromagnetic valve 90. In the connecting portion 100 of the handrail main chain 52, the positioning of the region 112, which is the discharge target region, and the discharge port 78 at the tip of the oil supply pipe 70 needs to have a certain width, so if the discharge period t2 is too short, the region 112 And the lubricating oil is dripped. Therefore, the inner diameter of the discharge port 78 is reduced to a size that can secure a sufficient amount of oil for the lubricating oil to reach the required location by capillary action in the connecting portion 100, and the discharge period t2 is appropriately increased. It is preferable to secure a positioning width.

  In the prior art, since the solenoid valve 90 is not provided corresponding to each discharge port 78, the pumping period t0 becomes the discharge period t2 as it is. On the other hand, in the said structure, the discharge period t2 becomes a period much shorter than the pumping period t0, and it can suppress that supply of the lubricating oil with respect to a chain becomes excessive.

  In the example of FIGS. 3 and 4, the solenoid valve 90 is fixed to and integrated with the sprocket rotating shaft 82 of the first idler sprocket portion 56. Instead of this, the electromagnetic valve 90 may be disposed at a position separated from the first idler sprocket portion 56. FIG. 6 shows an example in which the solenoid valve 90 separated from the first idler sprocket portion 56 and separated from the first idler sprocket portion 56 is fixed to the truss 22 or the like with the oil supply pipe 70 arranged in the same manner as FIG. A signal line 95 from the mesh detection sensor 92 is supported by the truss 22 and the like and disposed up to the electromagnetic valve 90 at a position where the rotation of the first idler sprocket portion 56 is not hindered.

  In the example of FIGS. 3 and 4, the discharge port 78 and the electromagnetic valve 90 at the tip of the oil supply pipe 70 are arranged coaxially with the mesh detection sensor 92 along the vertical direction passing through the center of the sprocket rotation shaft 82. Yes. Depending on the various sprockets provided in the escalator 10, it is difficult to arrange the discharge port 78 at the tip of the oil supply pipe 70 coaxially with the mesh detection sensor 92 along the vertical direction passing through the center of the sprocket rotation shaft 82. There is. For example, the drive sprocket unit 30 has a three-stage coaxial sprocket body, and various sensors related to the overall drive of the escalator 10 are arranged, so even if the non-contact mesh detection sensor 92 can be arranged, The arrangement of the discharge port 78 of the oil supply pipe 70 is difficult. In such a case, the arrangement position of the discharge port 78 at the tip of the oil supply pipe 70 may be shifted by the chain pitch P or an integral multiple of the chain pitch P along the longitudinal direction of the chain. In the example of FIG. 1, the solenoid valve and the discharge port 120 for the step chain 40 suspended on the medium-diameter drive sprocket body 34 of the drive sprocket portion 30 are chained from the medium-diameter drive sprocket body 34 along the longitudinal direction of the step chain 40. They are spaced apart by an integer multiple of the pitch P.

In the example of FIGS. 3 and 4, as described with reference to FIG. 5, the mesh detection signal is output every one pitch time t _P, so that depending on the specifications of the escalator 10 and the chain oiling device 60, the electromagnetic valve 90 It may be necessary to speed up the response characteristics of. One method for avoiding this is to reduce the operation speed of the escalator 10 in the time zone near the pumping period t0 within the operation period of the escalator 10. In the example of FIG. 5, the operating speed of the escalator 10 is slowed down for chain refueling only for a period longer than the pumping period every 6 hours four times within a day.

  Another method is to provide a plurality of discharge ports 78 for the first idler sprocket portion 56, and shift the position of each discharge port 78 by the chain pitch P of the handrail main chain 52 to feed different connecting portions 100. It is.

  FIG. 7 shows that the oil supply pipe 70 is divided into eight branch pipes 70-1, 70-2, 70-3, 70-4, 70-5 corresponding to the number of teeth 84 of the first idler sprocket part 56 = 8. , 70-6, 70-7, and 70-8. Discharge ports 78-1, 78-2, 78-3, 78-4, 78-5, 78-6, 78-7, and 78-8 are respectively provided at the tips of the eight branch pipes 70-1. . The eight discharge ports 78-1 and the like are connected to the connecting portions 100-1, 100-2, 100-3, 100-4, 100-5, 100 which are shifted by a chain pitch P along the moving direction in the handrail main chain 52. It faces -6, 100-7, 100-8. Further, in the eight branch pipes 70-1, etc., the solenoid valves 90-1, 90-2, 90-3, 90-4, 90-5, 90-6 are respectively provided in front of the discharge ports 78-1, etc. , 90-7, 90-8. The first idler sprocket unit 56 is provided with only one engagement detection sensor 92, and the engagement detection signal of the engagement detection sensor 92 is transmitted to eight electromagnetic valves 90-1 via eight signal lines (not shown). Etc. at the same time.

According to the configuration of FIG. 7, each time the first idler sprocket portion 56 makes one rotation, a meshing detection signal is output, and in response to this, the lubricating oil is supplied from the eight discharge ports 78-1 to the eight connecting portions 100. -1 etc. 3 and 6, the discharge period of the discharge period t2 is 1 pitch time t _P , but in the case of FIG. 7, the discharge period of the discharge period t2 extends to 8 t _P which is 8 pitch times. As a result, the solenoid valve 90-1 and the like can be used with products having a low response speed, and the number of magnetic small pieces 88 can be reduced. Note that the number of branch pipes and the like is set to 8 is an example for explanation, and the number of branch pipes and the like may be other than this.

  In the above description, the first idler sprocket portion 56 and the handrail main chain 52 are described. However, this is an example for explanation, and the present invention can be similarly applied to various other chains and various sprockets. For example, the present invention can also be applied to the step chain 40, and can also be applied to a combination of the handrail drive chain 54 and the third idler sprocket portion 58. Furthermore, by applying it to the intermediate sprocket portion 46 that is a two-stage coaxial sprocket, it becomes possible to supply lubricating oil to both the handrail main chain 52 and the handrail drive chain 54 simultaneously.

  According to the chain oil supply device 60 of the escalator having the above configuration, the electromagnetic valve 90 is provided in the middle of the oil supply pipe 70, and the lubricating oil pumped up from the pump 64 in the predetermined pumping period t0 is within the pumping period t0. The oil supply path is opened when the mesh detection signal is received. By setting the lubricating oil discharge port 78 at the tip of the oil supply pipe 70 at an appropriate location in the chain, it is possible to always supply oil to an appropriate location according to the movement of the chain. And can be prevented from flowing out.

  10 escalator, 12, 14 boarding gate, 16 steps, 18 balustrade, 20 moving handrail, 22 truss, 24 machine room, 26 drive motor, 28 motor side sprocket part, 30 drive sprocket part, 31 driven sprocket part, 32 large diameter drive Sprocket body, 34 Medium diameter drive sprocket body, 36 Small diameter drive sprocket body, 38 Drive chain, 40 Step chain, 42 Handrail movement drive section, 44 Handrail drive sprocket section, 46 Intermediate sprocket section, 48 Large diameter intermediate sprocket body, 50 Small diameter Intermediate sprocket body, 52 handrail main chain, 54 handrail drive chain, 56 first idler sprocket part, 57 second idler sprocket part, 58 third idler sprocket part, 60 (escalator) chain oil supply device ( Chain oil supply system for customer conveyor), 62 oil tank, 64 pump, 66 oil supply control unit, 68 distributor, 70 oil supply pipe, 70-1, 70-2, 70-3, 70-4, 70-5, 70- 6, 70-7, 70-8 Branch pipe, 78, 78-1, 78-2, 78-3, 78-4, 78-5, 78-6, 78-7, 78-8 Discharge port, 80 sprocket Body, 82 sprocket shaft, 84 teeth, 85 root, 86 small diameter boss, 87 bearing, 88 small piece of magnetic material, 90 solenoid valve, 92 meshing detection sensor (sensor), 93, 95 signal line, 94 mounting Part, 100 connecting part, 102, 103 outer plate (link member), 104, 105 inner plate (link member), 106 pin, 108 bush, 110 roller, 112, 113 (discharge target) area, 120 Solenoid valve and outlet (for step chain).

Claims (5)

A chain oil supply device for a passenger conveyor that supplies lubricating oil to a chain in which a plurality of link members are connected endlessly at a plurality of connecting portions,
An oil tank containing the lubricating oil;
A pump for pumping up the lubricating oil in the oil tank;
An oil supply control unit for pumping the lubricating oil from the pump only during a predetermined pumping period repeated at a predetermined pumping cycle;
An oil supply pipe that guides the lubricating oil pumped up from the pump to a position directly above the chain and has a discharge port at a tip;
A sensor unit that detects that the chain has moved in the longitudinal direction and the connecting unit has moved directly below the discharge port, and outputs a detection signal;
The oil supply pipe is provided in the middle of the oil supply path, is normally closed, and opens the oil supply path when the detection signal is received from the sensor unit within the pumping period, and the discharge is performed in a predetermined discharge period. An electromagnetic valve for discharging the lubricating oil from an outlet;
A chain fueling device for a passenger conveyor. The chain is
Both ends of a pair of front and rear bushes extrapolating a roller are coupled to a pair of left and right inner plates, and both ends of a pair of front and rear pins penetrating into the bushes are coupled to a pair of left and right outer plates. The outer links being alternately connected in the longitudinal direction of the chain to form a pair of front and rear connecting portions,
The discharge port is
The movement trajectory of the discharge target area when the chain moves, with the area where the bush is exposed in the gap between the inner link and the outer link in the connecting portion as the discharge target area of the lubricating oil The chain fueling device for a passenger conveyor according to claim 1, wherein the chain fueling device is disposed directly above the vehicle. A plurality of teeth arranged in the circumferential direction at a circumferential pitch corresponding to the chain pitch, with the arrangement pitch along the longitudinal direction of the pair of front and rear rollers as a chain pitch and being engaged between the pair of front and rear rollers A sprocket body having a portion;
A sprocket rotating shaft that rotatably supports the sprocket body;
Including a sprocket part including
The sensor unit is
A meshing detection sensor that detects that two adjacent tooth portions of the sprocket body mesh with one of the coupling portions of the chain and outputs a meshing detection signal;
The chain oil supply device for a passenger conveyor according to claim 2, wherein the solenoid valve opens the oil supply path during the discharge period when the mesh detection signal output from the mesh detection sensor is received. The solenoid valve is fixed to the sprocket rotating shaft,
The chain oil supply device for a passenger conveyor according to claim 3. The oil supply pipe is
It is composed of a plurality of branch pipes spaced apart from each other at the chain pitch along the longitudinal direction of the chain,
The chain oil supply device for a passenger conveyor according to claim 3, wherein the electromagnetic valve is provided in each of the plurality of branch pipes.

Images