JP2017160035A - Ratchet gap inspection support jig of escalator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further facilitate measurement of a ratchet gap, which is a gap dimension between an apical surface of a tooth part of a ratchet wheel and a meshing surface of a claw part of a ratchet pole, which face each other, in an escalator.SOLUTION: A ratchet gap inspection support jig 68 of an escalator including a ratchet wheel 44 integrally rotating with a drive spindle of the escalator and having a plurality of tooth parts on an outer periphery thereof, and a ratchet pole 48 having a claw part 49 meshing with the tooth part 46 of the ratchet wheel 44 when a drive chain is disconnected includes a wheel side jig 70 and a pole side jig 80. The wheel side jig 70 has an attachment part 72 detachably attached to the ratchet wheel 44 by a magnetic force, and a measure abutment part 76 fixed to the attachment part 72 at a right angle and extending from a tip position of the tooth part 46 of the ratchet wheel 44 beyond a width dimension of the ratchet pole 48.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a ratchet gap inspection support jig for an escalator. In particular, the present invention relates to a ratchet clearance inspection support jig that supports inspection of a ratchet clearance between a ratchet wheel and a ratchet pole, which is a safety device for an emergency in which a drive chain is cut in an escalator.

  For example, Patent Document 1 describes that as an emergency braking device for an escalator, a claw portion at the tip of a ratchet pole is engaged with a ratchet wheel to stop the rotation of the drive main shaft. Here, a shoe provided at the tip of the shoe lever is placed on a drive chain that transmits the driving force of the drive motor to the main shaft, and a ratchet pole that is interlocked with the movement of the shoe lever is provided. When the drive chain is broken, the shoe moves downward due to its own weight, whereby the shaft on which the shoe lever is attached rotates and the ratchet pole also rotates. And the nail | claw part of the front-end | tip of a ratchet pole meshes with the tooth | gear of a ratchet wheel, and rotation of the drive main shaft integral with a ratchet wheel stops.

JP 2011-201611 A

  In a normal operation state of the escalator, a predetermined ratchet clearance is provided between the ratchet wheel and the ratchet pole. Since the ratchet wheel and the ratchet pole constitute a safety device for the escalator, it is measured with a ruler or the like whether or not the ratchet gap is in a normal range during maintenance inspection. The ratchet wheel and the ratchet pole are provided inside the machine room of the escalator and are arranged at a position close to the drive mechanism. The measurement of the ratchet gap is carried out by a maintenance worker entering the close proximity to the drive mechanism in a narrow work space, so it is difficult to see the scale of the ruler. Therefore, a ratchet gap inspection support jig that makes it easier to measure the ratchet gap is desired.

  A ratchet gap inspection support jig for an escalator according to the present invention is provided at an end portion of a drive main shaft of an escalator, rotates integrally with the drive main shaft, and has a tip surface of a tooth portion of a ratchet wheel having a plurality of tooth portions on the outer periphery, and , A support jig for assisting inspection of the ratchet gap, which is a gap size facing each other, between the meshing surfaces of the ratchet pawl claw portion having a claw portion meshing with the tooth portion of the ratchet wheel. A mounting part that is detachably attached to the mounting part, and a measure abutment that is fixed at a right angle to the mounting part and extends beyond the width of the ratchet pole from the tip position of the tooth part of the ratchet wheel along the thickness direction of the tooth part. A wheel side jig having a portion.

  When measuring the ratchet clearance, the maintenance worker places the side of the ruler along the side of the ratchet wheel, and abuts the tip of the ruler against the meshing surface of the pawl portion of the ratchet pole. Since this measurement is performed by a maintenance worker entering the ratchet wheel close to the drive mechanism in a narrow work space, it is difficult to see the scale of the ruler. According to the above configuration, the ruler abutment portion fixed at a right angle to the attachment portion that is detachably attached to the side surface of the ratchet wheel from the tip position of the tooth portion of the ratchet wheel in the thickness direction of the tooth portion Extend beyond the width of the ratchet pole along. Therefore, the maintenance worker can measure the ratchet gap from the ratchet pole side by abutting the front end surface of the ruler against the ruler abutment portion, and the ratchet gap can be measured more easily than in the prior art.

  In the ratchet clearance inspection support jig for the escalator according to the present invention, the wheel side jig is a string portion whose one end is connected to the ruler abutment portion and the other end is fixed to the fixing member, and the wheel side jig is When the ratchet wheel is rotated in the attached state, it has a string portion for forcibly removing the wheel side jig against the magnetic attractive force between the ratchet wheel and the wheel side jig.

  According to the above configuration, even if the maintenance worker has finished checking the ratchet gap and forgot to remove the wheel side jig from the ratchet wheel, the wheel side jig is not rotated when the ratchet wheel rotates. It is forcibly removed from the ratchet wheel. As a result, the wheel-side jig that has been forgotten to be removed is prevented from being caught in the drive mechanism.

  In the ratchet clearance inspection support jig of the escalator according to the present invention, the pole side mounting plate that is detachably attached to the meshing surface of the ratchet pole and extends parallel to the ruled abutment portion of the wheel side jig attached to the ratchet wheel And a pole-side jig having a pole-side mounting plate on which a measurement correction plate having the same thickness as that of the ruler abutting portion is overlapped on the ruler side pressing surface side perpendicular to the extending direction.

  According to the above configuration, the maintenance worker can measure the ratchet gap by aligning the side of the ruler with the side of the pole side mounting surface of the pole side mounting plate and abutting the tip of the ruler against the ruler abutment. Measurement becomes easy. In addition, the position of the surface of the ruler abutment part against which the tip surface of the ruler is abutted is closer to the claw part of the ratchet pole than the tip position of the tooth part of the ratchet wheel by the plate thickness of the ruler abutment part. A measurement correction plate having the same thickness as the abutting portion is provided so as to overlap the pole side mounting plate. Therefore, if the maintenance worker reads the position of the end of the measurement correction plate on the side away from the ratchet wheel side on the side of the pole side mounting plate of the pole side mounting plate with the scale of the ruler, it becomes the size of the ratchet gap as it is, Correction calculation related to the thickness of the ruled abutment is not required.

  According to the ratchet gap inspection support jig of the escalator according to the present invention, the measurement of the ratchet gap becomes easier.

It is a block diagram of the escalator in which the ratchet clearance inspection support jig | tool of the escalator in embodiment which concerns on this invention is used. It is a figure which shows the inside of the machine room in which the ratchet clearance check support jig | tool of the escalator in embodiment which concerns on this invention is used. 2A is a view of the (+ X) direction as viewed from the (−X) direction of FIG. 1, and FIG. 2 (b) is a side view from the (−Y) direction of FIG. (C) is a side view from the (+ Y) direction of FIG. 1 with respect to (a). It is a figure which shows the ratchet clearance check inspection jig | tool of the escalator in embodiment which concerns on this invention, the ratchet wheel to which this is attached, and a ratchet pole. It is a figure which shows the state by which the ratchet clearance check inspection jig | tool of the escalator was attached to the ratchet wheel and the ratchet pole from the state of FIG. It is a figure which shows the measuring method of the ratchet clearance gap in a prior art.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. The shapes, dimensions, number of teeth, angles, and the like described below are examples for explanation, and can be appropriately changed according to the specifications of the escalator. 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 illustrating a configuration of the escalator 10. The escalator 10 is an elevating and conveying device that carries a user on a plurality of steps 16 that move between an entrance 12 on the upper floor of the building and an entrance 14 on the lower floor. A balustrade 18 and a moving handrail 20 are arranged on the side on which the user rides, that is, on the moving passage side where the steps move by connecting the upper and lower floors, and on the back side of the moving passage, that is, on the inside of the building structure. 22 is provided.

  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 26. The right step chain and the left step chain are engaged with the left and right ends of the step shaft provided in each step 16, respectively. In FIG. 1, the step chain 26 is represented by the right step chain.

  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 the user on the step 16, is slidably held on the upper part of the balustrade 18, and moves in an endless loop in synchronization with the movement of the step 16 by the handrail driving chain 28.

  The truss 22 is a part of a building structure in which the moving mechanism of the steps 16 and the moving mechanism of 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 below the floor of the upper floor side of the truss 22 is a machine room 24, a drive motor 30, a drive sprocket 32, a drive chain 36 suspended between the output shaft 34 of the drive motor 30 and the drive sprocket 32, A ratchet pole shaft 50 is disposed. These constitute the escalator driving device 11.

  A driven sprocket 33 is disposed in the space on the lower layer side of the truss 22. The drive sprocket 32 and the driven sprocket 33 are rotatably supported on the left and right wall surfaces of the truss 22. A step chain 26 is suspended between the drive sprocket 32 and the driven sprocket 33. The step chain 26 and the handrail drive chain 28 are driven by a drive sprocket 32.

  FIG. 1 shows the X, Y, and Z directions orthogonal to each other. The X direction is the transport direction in the escalator 10, the Y direction is the width direction of the escalator 10, and the Z direction is the height direction of the building.

  The contents of each element arranged inside the machine room 24 will be described in detail with reference to FIG. FIG. 2A is a view of the machine room 24 as seen from the (−X) direction side to the (+ X) direction side. (B) is the side view seen from the (-Y) direction about (a), (c) is the side view seen from the (+ Y) direction. In each figure, the wall portion of the truss 22 is appropriately broken so that the internal configuration of the machine room 24 can be seen. The ceiling portion of the machine room 24 is a floor portion of the upper floor of the building, and a manhole cover plate 23 is disposed there. The manhole cover plate 23 can be removed. When the manhole cover plate 23 is removed, the ceiling portion of the truss 22 is opened, and a maintenance worker can enter the machine room 24 through the opening. FIG. 1B shows a state where a part of the manhole cover plate 23 is removed. In the machine room 24, the steps 16 arranged in an endless loop shape in the truss 22 are folded back. In each figure of FIG. 2, four steps 16 in a folded state are shown.

  The drive motor 30 is an electric motor serving as a drive source for the steps 16 and the moving handrail 20. The output shaft 34 is a rotating shaft from which the power of the drive motor 30 is output. The output shaft 34 is an output gear attached to the rotation shaft of the drive motor 30 and having a predetermined number of teeth. As the drive motor 30, for example, a 200V drive three-phase electric motor or the like can be used.

  The drive sprocket 32 is a drive gear attached to the drive main shaft 38. The drive chain 36 is an endless chain for power transmission that is stretched between the output shaft 34 of the drive motor 30 and the drive sprocket 32. The driving force of the driving motor 30 is transmitted to the driving sprocket 32 by the driving chain 36, and the driving main shaft 38 is driven to rotate.

  The drive main shaft 38 is a rotating shaft in which both axial end portions are rotatably supported on both side walls in the Y direction in the machine room 24. The drive main shaft 38 extends in the width direction of the machine room 24, and in addition to the drive sprocket 32, a right step sprocket 40, a left step sprocket 42, and a ratchet wheel 44 are attached. In the example of FIG. 2A, the drive sprocket 32, the right step sprocket 40, the left step sprocket 42, and the ratchet wheel 44 are attached in order from the (−Y) direction to the (+ Y) direction. Rotate with the rotation.

  The right step sprocket 40 is a drive gear that drives the right step chain, and the left step sprocket 42 is a drive gear that drives the left step chain.

  The ratchet pole shaft 50 is a shaft member that is rotatably supported by support portions 54 and 56 fixed to the ceiling portion of the truss 22 and is disposed in parallel to the drive main shaft 38 in the width direction of the truss 22. Both end portions are free ends with respect to the left and right walls of the truss 22. The support portions 54 and 56 are provided with support holes through which the ratchet pole shaft 50 passes.

  The shoe lever 60 is a member having a shoe 62 with a root portion fixed to an end portion in the (−Y) direction, which is one end portion of the ratchet pole shaft 50, and a tip portion placed on the outer peripheral surface of the drive chain 36. is there. The shoe 62 is made of resin or the like so as not to damage the drive chain 36 and is placed on the drive chain 36 by its own weight. The position in the X direction where the shoe 62 is placed on the drive chain 36 is separated from the position in the X direction of the ratchet pole shaft 50 at a predetermined interval in the (−X) direction. When the drive chain 36 is broken, the predetermined interval is rotated by a predetermined angle or more by the weight of the shoe 62 and the shoe lever 60, and the position of the shoe 62 in the X direction is the position of the ratchet pole shaft 50 in the X direction. It is set so that it can move to. The predetermined angle is an angle at which the claw portion 49 at the tip end of the ratchet pole 48 can engage with the tooth portion 46 of the ratchet wheel 44 to stop the rotation of the drive main shaft 38 and is about 30 degrees.

The ratchet wheel 44 is an iron ratchet gear provided with a plurality of teeth 46 on the outer periphery. The ratchet pole 48 is a member having a claw portion 49 that can be engaged with the tooth portion 46 of the ratchet wheel 44 at the tip portion. The ratchet pole 48 is attached integrally to the end of the (+ Y) direction which is the other end of the ratchet pole shaft 50. When the ratchet pole shaft 50 does not rotate, the ratchet pole 48 is self-weighted in the (−Z) direction. Hang down. In this state, the claw portion 49 at the tip of the ratchet pole 48 has a predetermined ratchet gap S (see FIG. 3) in the X direction so as not to mesh with the teeth 46 of the ratchet wheel 44. The predetermined ratchet clearance S is set so that the claw portion 49 at the tip of the ratchet pole 48 meshes with the tooth portion 46 of the ratchet wheel 44 only when the ratchet pole shaft 50 is rotated by a predetermined rotation angle. The width dimension W _P which is the length along the Y direction of the meshing surface 66 in the claw portion 49 of the ratchet pole 48 is larger than the thickness dimension W _W along the Y direction of the tooth portion 46 of the ratchet wheel 44. This dimensional difference ensures engagement.

  When the claw portion 49 at the tip of the ratchet pole 48 meshes with the tooth portion 46 of the ratchet wheel 44, the ratchet wheel 44 is prohibited from rotating in the rotational direction indicated by the broken line in FIG. Since the rotation of the ratchet wheel 44 is the same as the rotation of the drive main shaft 38, any of the drive sprocket 32, the right step sprocket 40, and the left step sprocket 42 attached to the drive main shaft 38 rotates in the rotation direction indicated by the broken line. Is prohibited. The rotation direction indicated by the broken line is the direction in which the step 16 descends. In this way, when the claw portion 49 at the tip of the ratchet pole 48 meshes with the tooth portion 46 of the ratchet wheel 44, the operation of the escalator 10 stops, so that a predetermined rotation angle is set to be considerably large in order to avoid malfunction. An example is about 30 degrees. At a rotation angle of several degrees, the claw portion 49 at the tip of the ratchet pole 48 does not mesh with the tooth portion 46 of the ratchet wheel 44, and the rotation of the drive main shaft 38 does not stop.

  The abnormality detection unit 52 detects and outputs that the ratchet pole shaft 50 rotates beyond a predetermined rotation angle and the claw portion 49 at the tip of the ratchet pole 48 meshes with the tooth portion 46 of the ratchet wheel 44. It is a signal output unit. The abnormality detection signal is transmitted to the operation control unit of the escalator 10 via an appropriate signal line (not shown), and the entire operation of the escalator 10 is stopped.

  Thus, the shoe lever 60, the shoe 62, the ratchet pole shaft 50, the ratchet pole 48, and the claw portion 49 at the tip thereof are shown in FIG. 2C with respect to the drive main shaft 38 when the drive chain 36 is cut. This is a mechanical emergency stop means for forcibly prohibiting rotation in the direction of the broken line.

  Since the ratchet wheel 44 and the ratchet pole 48 constitute a safety device of the escalator 10, it is measured whether or not the ratchet clearance S is in a normal range during maintenance inspection. The escalator ratchet clearance inspection support jig 68 for supporting the inspection of the ratchet clearance S will be described below with reference to FIG. Hereinafter, unless otherwise specified, the escalator ratchet gap inspection support jig is simply referred to as a gap inspection support jig.

  FIG. 3 is a perspective view showing the ratchet wheel 44 and the ratchet pole 48 in the machine room 24 together with the gap inspection support jig 68 before being attached to these. In order to check the ratchet clearance S, the driving main shaft 38 is appropriately rotated with the operation mode of the escalator 10 as the maintenance mode, the tip surface 64 of one tooth portion 46 of the ratchet wheel 44, and the claw portion 49 of the ratchet pole 48. The meshing surface 66 faces the substantially parallel surface. The interval between the tip surface 64 of the tooth portion 46 and the meshing surface 66 of the claw portion 49 is a ratchet gap S. An example of the size of the ratchet gap S is about 40 mm.

  The gap inspection support jig 68 includes a wheel side jig 70 and a pole side jig 80. The wheel side jig 70 is a jig that is detachably attached to the side surface 65 of the iron ratchet wheel 44 by a magnetic attractive force. The pole-side jig 80 is a jig that is detachably fixed to the claw portion 49 of the ratchet pole 48 by an attachment string portion.

  The wheel side jig 70 includes an L-shaped attachment portion 72 bent at a right angle, a magnet plate 74 fixed to the tip of the attachment portion 72, a rule abutment portion 76 fixed to the attachment portion 72, and a ruler. A string portion 71 having one end connected to the abutting portion 76 is included.

  The attachment portion 72 is a member formed by bending one long metal plate into an L shape that is perpendicular to each other. In FIG. 3, one side portion of the L shape that forms a right angle is arranged in parallel to the X direction, and the other side portion is arranged to be in the Y direction. Therefore, the portion on one side of the L-shaped bend in the mounting portion 72 is referred to as the X side portion, the portion on the other side of the L-shaped bend is referred to as the Y side portion, and the outer surface bent into the L shape is the outer surface. The inner surface is called the inner surface. In the attachment portion 72, the outer side surface of the X side portion is a surface to which the magnet plate 74 is fixed. The outer side surface of the Y side portion is a surface to which the other side surface 78 of the ruled abutment portion 76 is fixed. Nothing is attached to the L-shaped inner surface of the attachment portion 72.

  The magnet plate 74 is a magnetic attraction member used for detachably attaching the entire wheel side jig 70 to the side surface 65 of the iron ratchet wheel 44. The strength of magnetic attraction may be such that it does not move during the measurement of the ratchet gap S. As the magnet plate 74, a plastic magnet having a uniform thickness is used. An appropriate adhesive is used for fixing between the magnet plate 74 and the mounting portion 72.

  The ruler abutment portion 76 is a long metal plate having a uniform thickness t and having a predetermined length. One side surface of the ruler abutment portion 76 is an abutment surface against which the tip of the ruler 100 (see FIG. 4) is abutted. The side surface 78 on the other side opposite to the one side of the ruler abutment portion 76 is a fixed surface that is fixed to the outer surface of the Y side portion of the attachment portion 72. An appropriate adhesive is used for fixing between the rule abutment portion 76 and the Y side portion of the attachment portion 72. As a result, the X side portion of the mounting portion 72 and the ruled abutment portion 76 are integrated at a right angle.

At the time of bonding, alignment is performed so that the attraction surface opposite to the bonding surface of the magnet plate 74 and the other side surface of the ruler abutment portion 76 are perpendicular to each other. As a result, the rule abutment portion 76 that is fixed to the outer surface of the Y side portion of the attachment portion 72 extends in the Y direction. Adhesion is performed by arranging the Y-side portion of the attachment portion 72 in the middle portion of the ruler abutment portion 76 in the longitudinal direction. The ruled abutment portion 76 is divided along the Y direction into three parts: an adhesive part 73, a protruding part 75 in the (+ Y) direction with respect to the adhesive part 73, and an extended part 77 in the (−Y) direction with respect to the adhesive part 73. Then, the measure abutment portion 76 and the Y side portion of the attachment portion 72 are bonded to each other at the intermediate bonded portion 73. The protruding length of the protruding portion 75 along the Y direction is greater than (thickness of the magnet plate 74 + thickness of the adhesive layer for fixing the magnet plate 74 + thickness dimension W _W of the tooth portion 46 of the ratchet wheel 44). Set longer. The extension length along the Y direction of the extension portion 77 is set appropriately. In the example of FIG. 3, the extension length of the extension portion 77 is substantially the same as the length of the adhesion portion 73.

  The string portion 71 is a string member having a predetermined length of flexibility, one end of which is connected to an end portion in the (−Y) direction of the rule abutment portion 76. One end may be connected to the attachment portion 72. An attachment portion such as an attachment ring is provided at the other end of the string portion 71. Instead of an attachment ring or the like, a simple knot may be used as the attachment portion. The attachment portion at the other end is fixed to a fixing member outside the rotation range of the ratchet wheel 44. For example, the attachment portion at the other end of the string portion 71 is fixed to the pole side jig 80 which is another component of the gap inspection support jig 68. Thereby, the wheel side jig 70 and the pole side jig 80 are integrated by the string portion 71. When it is not necessary to use the pole side jig 80, the attachment portion at the other end of the string portion 71 is fixed to the truss 22. As the string portion 71, a cloth string whose length hardly changes when pulled is used. Instead, a rubber cord having a breaking strength larger than the attractive force due to the magnetic force between the magnet plate 74 and the ratchet wheel 44 may be used.

  The pole-side jig 80 includes a pole-side mounting plate 82, a mounting string portion 84 for mounting the pole-side mounting plate 82 to the ratchet pole 48, and a measurement correction plate provided so as to overlap the side surface 83 on one side of the pole-side mounting plate 82. 86.

  The pole-side mounting plate 82 is a rectangular metal plate that is detachably mounted so that one side surface 83 faces the meshing surface 66 of the claw portion 49 of the ratchet pole 48. In FIG. 3, the long side of the rectangular shape of the pole side mounting plate 82 is parallel to the Y direction and the short side direction is parallel to the Z direction so that the side surface 83 on one side is parallel to the meshing surface 66. Show.

The attachment string portion 84 is an elastic string that can be expanded and contracted, and for example, a rubber string is used. Both end portions of the attachment string portion 84 are spaced apart from the side surfaces 83 on one side of the pole-side attachment plate 82 at intervals wider than the width dimension W _P along the Y direction of the meshing surface 66 of the claw portion 49 of the ratchet pole 48. Fixed. When the attachment string portion 84 is extended, a gap can be formed between the pole side attachment plate 82 and the side surface 83 on one side, and the claw portion 49 of the ratchet pole 48 is inserted into this gap to return the extension to the original state. The pole side mounting plate 82 is attached to the claw portion 49 of the ratchet pole 48. The number of the attachment string portions 84 is preferably plural. In the example of FIG. 3, there are two attachment string portions 84. By using a plurality, the pole side jig 80 can be attached to the ratchet pole 48 in a stable manner.

  The pole-side attachment plate 82 has an extending portion 85 that extends further in the (−Y) direction than the end portion in the (−Y) direction of the attachment string portion 84. The length of the stretched portion 85 along the Y direction is longer than the length of the adhesive portion 73 of the ruler abutment portion 76 along the Y direction, {(length of the adhesive portion 73 along the Y direction) + (extension The extension length of the portion 77)} is set shorter.

  The measurement correction plate 86 is a rectangular plate having a thickness t, and is disposed so as to overlap the side surface 83 on one side of the pole-side mounting plate 82 and is fixed with an appropriate adhesive. The thickness t is the same as the thickness t of the rule abutment portion 76. The dimension along the Z direction of the measurement correction plate 86 is substantially the same as the dimension along the Z direction of the pole-side mounting plate 82, and the dimension along the Y direction of the measurement correction plate 86 is along the Y direction of the extended portion 85. It is set smaller than the dimension. The end face at the end in the (−Y) direction of the measurement correction plate 86 is aligned with the end face at the end in the (−Y) direction of the extended portion 85 of the pole-side mounting plate 82. Since the end faces aligned on the same plane are end faces at the (−Y) direction end of the pole-side jig 80, they are referred to as Y-side end faces 88.

  FIG. 4 is a view showing a state in which the ratchet gap inspection support jig 68 is attached to the ratchet wheel 44 and the ratchet pole 48. Regarding the attachment of the wheel side jig 70 to the ratchet wheel 44 and the attachment of the pole side jig 80 to the claw portion 49 of the ratchet pole 48, the relationship with FIG. 3 will be described below.

The wheel side jig 70 is attached to the ratchet wheel 44 by moving the object abutment portion 76 of the wheel side jig 70 in the state of FIG. 3 in the (+ Y) direction. That is, the magnet plate 74 is attracted to the side surface 65 of the ratchet wheel 44 so that the other side surface 78 of the protruding portion 75 of the ruler abutment portion 76 is pressed against and contacted with the tip surface 64 of the tooth portion 46 of the ratchet wheel 44. Let Accordingly, the ruler abutment portion 76 extends from the position along the X direction of the tip surface 64 of the tooth portion 46 of the ratchet wheel 44 along the Y direction that is the thickness direction of the tooth portion 46, and the claw portion 49 of the ratchet pole 48. It extends beyond the width dimension W _P along the Y direction. The stretching direction is the (−Y) direction. By using the part where the ruler abutment portion 76 extends in the (−Y) direction, the ratchet clearance S can be measured at a position away from the side surface 65 of the ratchet wheel 44 along the (−Y) direction. .

The pole-side jig 80 is attached to the claw portion 49 of the ratchet pole 48 by extending the attachment string portion 84 of the pole-side jig 80 in the state of FIG. 3 to form a gap with the pole-side mounting plate 82, This is performed by moving the pole side jig 80 in the (+ Z) direction. That is, the claw portion 49 of the ratchet pole 48 is inserted into the gap formed between the pole side attachment plate 82 by the extension of the attachment cord portion 84, and the extension of the attachment cord portion 84 is restored. As a result, the side surface 83 on one side of the pole side mounting plate 82 comes into close contact with the meshing surface 66 of the claw portion 49 of the ratchet pole 48, and the pole side jig 80 is fixed to the claw portion 49 of the ratchet pole 48. The pole side mounting plate 82 extends beyond the width dimension W _P along the Y direction of the meshing surface 66 of the claw portion 49 of the ratchet pole 48. The stretching direction is the (−Y) direction. The length of the stretched portion 85 along the Y direction is longer than the length of the adhesive portion 73 of the ruler abutment portion 76 along the Y direction, {(length of the adhesive portion 73 along the Y direction) + (extension The length of the portion 77 is shorter than the extension length)}. Accordingly, the rule abutment portion 76 extends further in the (−Y) direction than the Y side end surface 88 that is the end surface of the pole side jig 80 at the (−Y) direction end.

  Using this relationship, the front end surface of the ruler 100 in the longitudinal direction is pressed against the ruler abutment portion 76 of the wheel side jig 70 while pressing the side surface along the longitudinal direction of the ruler 100 against the Y side end surface 88 of the pole side jig 80. Butt against the side of one side. Here, the Y-side end surface 88 of the pole-side jig 80 serves as a ruler side pressing surface. The front end surface of the ruler 100 in the longitudinal direction is the origin position of the scale of the ruler 100. Therefore, the position of one side surface that is the side surface on the −X side of the measurement correction plate 86 on the Y side end surface 88 of the pole side jig 80 is read with the ruler 100.

  4, a position 79 in the X direction of the tip surface 64 of the tooth portion 46 of the ratchet wheel 44 and a position 89 in the X direction of the meshing surface 66 of the claw portion 49 of the ratchet pole 48 are shown. The ratchet gap S is S = {(position 79) − (position 89)}. The ruler 100 does not measure the positions 79 and 89. Instead of measuring the positions 79 and 89, the ruler 100 measures a position 90 in the X direction on one side surface of the ruler abutment portion 76 and a position 92 in the X direction on the one side surface of the measurement correction plate 86. To do. As shown in FIG. 4, the difference between the position 79 and the position 90 is the thickness t of the rule abutment portion 76, and the difference between the position 89 and the position 92 is the thickness t of the measurement correction plate 86. From this relationship, {(position 90) − (position 92)} = [{(position 79) −t} − {(position 89) −t}] = {(position 79) − (position 89)} = ratchet gap S, and the ratchet gap S is measured by the measuring method of FIG.

  According to the measurement method of FIG. 4, a maintenance worker who checks the ratchet clearance in the machine room 24 of the escalator 10 places the tip surface of the ruler 100 from the ratchet pole 48 side to the one side surface of the ruler abutment portion 76. The ratchet gap S can be measured by abutting.

For comparison with the measuring method of FIG. 4, a measuring method of the ratchet gap S in the prior art is shown in FIG. In the escalator 10, the width dimension W _P along the Y direction of the meshing surface 66 of the claw portion 49 of the ratchet pole 48 is larger than the thickness dimension W _W of the tooth portion 46 of the ratchet wheel. For this reason, the maintenance worker cannot take a measurement method in which the tip surface of the ruler 101 is brought into contact with the tip surface 64 of the tooth portion 46 of the ratchet wheel 44. Therefore, in the prior art, the maintenance worker places the side surface of the ruler 101 along the side surface 65 of the ratchet wheel 44 and abuts the front end surface of the ruler 101 against the meshing surface 66 of the claw portion 49 of the ratchet pole 48. Since the position 89 in the X direction of the meshing surface 66 of the claw portion 49 of the ratchet pole 48 is the origin position of the ruler 101, the position 79 in the X direction of the tip surface 64 of the tooth portion 46 of the ratchet wheel 44 is determined from the scale of the ruler 102. Read it. Then, {(position 79) − (position 89)} = ratchet gap S is measured.

  Compared with the measurement method of FIG. 4 using the gap inspection support jig 68, in the conventional measurement method of FIG. 5, a part of the ruler 101 is hidden behind the ratchet pole 48 and is difficult to see. Therefore, the maintenance worker gets into the ratchet wheel 44 close to the drive mechanism in the narrow working space of the machine room 24 and reads the scale of the ruler, and the workability of measuring the ratchet gap S is not good. On the other hand, in the method of FIG. 4, since the scale of the ruler 100 can be read from the ratchet pole 48 side, the measurement workability of the ratchet gap S is improved as compared with the prior art.

  Although illustration of the string part 71 is omitted in FIG. 4, the attachment part at the other end of the string part 71 is fixed to the pole-side jig 80. Since the pole side jig 80 is fixed to the claw portion 49 of the ratchet pole 48, it corresponds to a fixing member whose position is fixed with respect to the rotation of the ratchet wheel 44. If the maintenance worker finishes checking the ratchet gap S and forgets to remove the wheel side jig 70 from the ratchet wheel 44, the wheel side jig is restrained by the length of the string portion 71 when the ratchet wheel 44 rotates. 70 is detached from the ratchet wheel 44. This prevents the wheel-side jig 70 that has been forgotten to be removed from being caught in the drive mechanism. Thus, the string portion 71 serves as a forcible detachment string from the ratchet wheel 44 of the wheel side jig 70.

  In the above description, the pole-side jig 80 is used in order to correct an error in the measurement of the ratchet gap S due to the thickness t of the measure abutment portion 76 in the gap inspection support jig 68. Instead, a step corresponding to the thickness t is provided on the (+ X) direction side in the elongated portion 77 of the rule abutting portion 76. The pole side jig | tool 80 can be abbreviate | omitted by using the measure butting part 76 of this structure.

  10 escalators, 11 escalator drive units, 12, 14 boarding gates, 16 steps, 18 balustrades, 20 moving handrails, 22 trusses, 23 manhole cover plates, 24 machine rooms, 26 step chains, 28 handrail drive chains, 30 drive motors, 32 Drive sprocket, 33 Drive sprocket, 34 Output shaft, 36 Drive chain, 38 Drive main shaft, 40 Right step sprocket, 42 Left step sprocket, 44 Ratchet wheel, 46 Teeth, 48 Ratchet pole, 49 Claw, 50 Ratchet pole shaft , 52 Abnormality detection unit, 54, 56 Support unit, 60 Shoe lever, 62 Shoe, 64 Tip surface, 65 Side surface, 66 Mating surface, 68 (Escalator ratchet) Gap inspection support jig, 70 Wheel side jig, 71 String Part, 72 mounting part, 73 Wearing part, 74 Magnet plate, 75 Protruding part, 76 Ruler abutting part, 77 Extending part, 78 Side surface on the other side, 79, 89, 90, 92 position, 80 pole side jig, 82 Pole side mounting plate, 83 Side surface, 84 attachment string part, 85 stretched part, 86 measurement correction plate, 88 Y side end face, 100, 101 ruler.

Claims (3)

A tip surface of the tooth portion of the ratchet wheel which is provided at an end portion of the drive main shaft of the escalator and rotates integrally with the drive main shaft and has a plurality of tooth portions on the outer periphery, and a claw portion which meshes with the tooth portion of the ratchet wheel A support jig for assisting in the inspection of the ratchet gap, which is a gap dimension facing each other, between the meshing surfaces of the claw portions of the ratchet pole having
An attachment portion detachably attached to the side surface of the ratchet wheel by magnetic force;
A ruled abutment portion fixed at a right angle to the mounting portion and extending beyond the width dimension of the ratchet pole along the thickness direction of the tooth portion from the tip position of the tooth portion of the ratchet wheel;
An escalator ratchet clearance check jig including a wheel side jig having In the escalator ratchet gap inspection support jig according to claim 1,
The wheel side jig is a string part having one end connected to the ruler abutment part and the other end fixed to another fixing member, and the ratchet wheel is attached to the wheel side jig. An escalator ratchet gap inspection support jig having the string portion for forcibly removing the wheel side jig against the magnetic attractive force between the ratchet wheel and the wheel side jig when rotating. In the escalator ratchet gap inspection support jig according to claim 1,
A pole-side mounting plate that is detachably attached to the meshing surface of the ratchet pole and extends parallel to the ruled abutment portion of the wheel-side jig attached to the ratchet wheel, and is perpendicular to the extending direction. An escalator ratchet gap inspection support jig including a pole-side jig having the pole-side mounting plate provided with a measurement correction plate having the same thickness as that of the ruler abutting portion on the ruler side pressing surface side.

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