JP6539238B2 - Moving handrail flaw detector for passenger conveyor - Google Patents

Description

  The present invention relates to a moving handrail flaw detector for a passenger conveyor.

  As technical background of this technical field, there is JP-A-2014-152001 (patent document 1). According to this publication, in the moving handrail flaw detection apparatus for a passenger conveyor, the first and second moving handrail guides 10 and 11 (guide mechanisms) follow the shape change of the moving handrail 2 and the canvas surface Since the roller 12 (following mechanism) moving in a direction perpendicular to the back surface 2b (rear surface) is provided, even if the moving handrail degrades and deformation or swelling occurs, radiation transmission is performed at a constant position in the thickness direction of the moving handrail. I can get a map. "

JP, 2014-152001, A

  However, in the moving handrail flaw detector of the passenger conveyor described in Patent Document 1, even if a protrusion is present on part of the width direction on the back side of the moving handrail, the roller is pressed by the protrusion and the roller is lowered. Pushed down in the direction. For this reason, a gap is formed between the roller and the back surface of the canvas on both sides of the projection, and there is a risk that radiation leaks from this gap.

In order to solve the above problems, for example, the configuration described in the claims is adopted.
The present application includes a plurality of means for solving the above-mentioned problems, and an example thereof is a flaw detector for holding a moving handrail of a passenger conveyor to project radiation, and the aforementioned pinched in a predetermined state by the flaw detector. And a guide mechanism which is inserted to the back side of the moving handrail and attached to the flaw detector in a relatively movable state in the extending direction of the moving handrail, the guide mechanism being in a predetermined state of the flaw detector. In a moving handrail flaw detector for a passenger conveyor having a following mechanism that contacts the back surface of the moving handrail that is held and follows the uneven shape of the back surface, the following mechanism is held in a predetermined state by the flaw detector. It is divided into a plurality of pieces in the width direction of the moving handrail.

According to the moving handrail flaw detector for a passenger conveyor of the present invention, it is possible to carry out a flaw detection inspection of a moving handrail that has prevented radiation leakage regardless of the shape of the protrusion on the back surface side.
Problems, configurations, and effects other than those described above will be made clear by the description of the embodiments below.

It is a schematic perspective view of the escalator as a general passenger conveyor. It is sectional drawing which shows the moving handrail in a passenger conveyor, and its supporting structure. It is a schematic block diagram of the escalator as a general passenger conveyor. It is an external view of a moving handrail flaw detector for a passenger conveyor according to an embodiment of the present invention. It is a figure for demonstrating the use condition of the moving handrail flaw detection apparatus of the passenger conveyor which concerns on embodiment of this invention. It is a schematic top view of the lower main part of the movement handrail flaw detector concerning embodiment. It is a schematic side view (the 1) of a guide mechanism of a mobile handrail flaw detector, and is a figure explaining an example of inspection of a handrail for movement. It is a schematic side view (the 2) of a guide mechanism of a mobile handrail flaw detector, and is a figure explaining another example of inspection of a handrail for movement. It is a perspective view (the 1) of the following mechanism which constitutes the guide mechanism of a mobile handrail flaw detector. It is a perspective view (the 2) of a following mechanism which constitutes a guide mechanism of a mobile handrail flaw detector.

  Hereinafter, prior to describing the configuration of a moving handrail flaw detector for a passenger conveyor according to the embodiment, the structure of a passenger conveyor to be inspected by the moving handrail flaw detector will be described in detail based on the drawings.

«Composition of passenger conveyor»
FIG. 1 is a schematic perspective view of an escalator as a general passenger conveyor 100. The passenger conveyor 100 may be, for example, a moving sidewalk in addition to the escalator. Here, the passenger conveyor 100 will be described using the escalator as an example. The passenger conveyor 100 shown in this figure comprises a step 101, a deck 102, a balustrade 103, and a moving handrail 104.

  Step 101 is a part on which a passenger rides, and is arranged between the upper and lower floors of the building. The deck 102 is provided between the upper floor and the lower floor of the building on both sides of the step 101, and accommodates therein a driving device for driving the moving handrail 104 and the like. The balustrade 103 is provided standing from the deck 102 on both sides across the step 101. The moving handrail 104 is configured in an endless shape, is disposed along the periphery of the balustrade 103, and revolves in the same direction as the step 101 by a driving device accommodated in the deck 102.

  FIG. 2: is sectional drawing which shows the moving handrail in a passenger conveyor, and its supporting structure. As shown in this figure, the moving handrail 104 has a shape in which a portion directed to the inside of the endless tube-shaped side wall is cut open in the extending direction of the tube. Further, the moving handrail 104 has a plurality of wires 104a installed in the side wall portion facing the portion where the tube shape is cut open along the extending direction of the moving handrail 104. The wire 104 a is made of, for example, steel and may be a steel cord or a steel tape, and is used as a tension body of the moving handrail 104. Such a moving handrail 104 has a tube-shaped inner circumferential surface as a back surface, and the back surface is a canvas surface 104 b covered with a plurality of layers of canvas.

  On the other hand, a moving handrail guide 103 a covered with the moving handrail 104 is provided upright on the upper portion of the balustrade 103. The moving handrail guide 103 a has a shape in which an upper end erected above the balustrade 103 is protruded in a flange shape in both width directions. As a result, the canvas surface 104b side of the movable handrail 104 is engaged with and covered with the portion projecting like a flange, so that the movable handrail 104 is mounted in a stable state.

  FIG. 3 is a schematic diagram of an escalator as a general passenger conveyor. As shown in this figure, a passenger conveyor 100 as an escalator has a frame 106 embedded and bridged between the lower and upper floors of the building. Further, inside the frame 106, a driving sprocket 107 which is rotated by a driving device (not shown) provided below the floor of the upper floor and a driven sprocket 108 provided below the floor of the lower floor are accommodated. A chain (not shown) is wound around the drive sprocket 107 and the driven sprocket 108, and a plurality of steps 101 shown in FIG. 1 are endlessly attached to the chain.

  Further, inside the frame 106 is housed a pulley 109 around which the moving handrail 104 shown in FIG. 1 is wound. A chain 110 is wound around the pulley 109 and the drive sprocket 107. As a result, the moving handrail 104 rotates in synchronization with step 101. Further, inside the frame 106, a moving handrail support guide 111 is provided, whereby the tension of the moving handrail 104 is secured.

«Moving handrail flaw detector»
Next, the configuration of the moving handrail flaw detector for a passenger conveyor according to the embodiment will be described. The moving handrail flaw detector described here is for inspecting the state of the wire 104a in the moving handrail 104 in the passenger conveyor 100 described above by radiation projection. In the following, first, the appearance configuration of the moving handrail flaw detection apparatus will be described, and then, the main configuration of the moving handrail flaw detection apparatus will be described.

<Appearance configuration of moving handrail flaw detector>
FIG. 4 is an external view of a moving handrail flaw detector for a passenger conveyor according to an embodiment of the present invention. As shown in this figure, a moving handrail flaw detector (hereinafter simply referred to as a flaw detector 1) of a passenger conveyor includes a lower main body 11, an upper main body 12, radiation shielding members 13 and 14, an attachment member 15, and a roller 16. ing. These configurations are as follows.

[Lower main body 11 and upper main body 12]
The lower main body 11 and the upper main body 12 constitute a flaw detector which performs radiation projection by holding the moving handrail 104 therebetween. Such lower body 11 and upper body 12 each include a radiation irradiator including a radiation source in a housing. Further, the other includes a light receiving unit such as a fluorescent plate in a housing, and a semiconductor element or a camera for forming image data from a radiation image received by the light receiving unit. As a result, a radiation image by radiation transmitted from the radiation irradiation unit and transmitted through the moving handrail 104 is obtained. Here, as an example, the light receiving unit, the semiconductor element, the camera, and the like are housed in the housing of the lower main body 11, and the radiation irradiator is housed in the housing of the upper main body 12.

  The lower main body 11 and the upper main body 12 are connected at two places by the hinges 17 and can be freely attached to and detached from the two connected places. The lower main body 11 and the upper main body 12 are provided with connection fittings 18a and 18b on the side opposite to the two places connected by the hinge 17, and the fixed state of the lower main body 11 and the upper main body 12 from the fixed state It is free to open. The lower main body 11 and the upper main body 12 connected by such a hinge 17 and the connecting brackets 18a and 18b are between the lower main body 11 and the upper main body 12 and between the hinge 17 and the connecting brackets 18a and 18b. The moving handrail 104 is placed on the two sides and held.

  In the lower main body 11 and the upper main body 12 constituting the flaw detector using the radiation as described above, both ends of the moving handrail 104 sandwiched between the lower main body 11 and the upper main body 12 are derived from the upper main body 12 A pair of openings 12a. In the flaw detector, in a state in which a part of the moving handrail 104 is held between the lower main body 11 and the upper main body 12, the outer shape is formed by the case having the radiation shielding effect except for the opening 12a. The path will be covered. Although only one opening 12a is illustrated in FIG. 4, another opening is disposed at a position facing the illustrated opening 12a.

[Radiation shielding members 13, 14]
The radiation shielding members 13 and 14 are for preventing leakage of radiation from the flaw detector including the lower main body 11 and the upper main body 12 to the outside, and the radiation shielding members 13 and 14 have a pair of openings 12 a provided in the upper main body 12. It is provided in the state which covers each. Among them, the radiation shielding member 13 provided in the lower main body 11 has a shape that covers the space in the lower half of the movable handrail 104 in a state in which the movable handrail 104 is sandwiched between the lower main body 11 and the upper main body 12. It is erected on top. On the other hand, the radiation shielding member 14 provided on the upper main body 12 is formed of a plurality of divided rectangular shielding films, and is disposed so as to entirely cover the opening 12a.

  With such a configuration, even when the flaw detector composed of the lower main body 11 and the upper main body 12 sandwiching the moving handrail 104 is relatively moved in the extending direction of the moving handrail 104, the opening 12a is While the relative movement is made freely, the radiation shielding members 13 and 14 are kept closed. Therefore, the radiation shielding members 13 and 14 can effectively prevent the radiation from leaking to the outside of the flaw detector including the lower main body 11 and the upper main body 12.

[Mounting member 15]
The attachment member 15 is a member for attaching the flaw detector composed of the lower main body 11 and the upper main body 12 to the moving handrail guide 103 a at the upper part of the balustrade 103 of the passenger conveyor. The mounting member 15 is provided on the bottom surface of the lower main body 11, and supports the flange portion of the moving handrail guide 103a from both sides by screwing.

  FIG. 5 is a view for explaining the use state of the flaw detection apparatus 1. As shown to this figure, the flaw detection apparatus 1 is installed in the part which removed some moving handrails 104 from the moving handrail guide 103a on the balustrade 103 of the passenger conveyor 100. As shown in FIG. The flaw detection apparatus 1 in the state installed on the passenger conveyor 100 supports the moving handrail guide 103 a by the mounting member 15. Further, the flaw detection apparatus 1 sandwiches the moving handrail 104 between the lower main body 11 and the upper main body 12 in a predetermined state in which the canvas surface 104 b is directed to the lower main body 11 side.

[Roller 16]
Returning to FIG. 4, the roller 16 is placed on the moving handrail guide 103 a in a state where the moving handrail guide 103 a is supported by the mounting member 15, and is rotatable in the extending direction of the moving handrail guide 103 a And the mounting member 15 is supported. Further, the flaw detector constituted by the lower main body 11 and the upper main body 12 is configured to travel along the moving handrail guide 103 a by rotational driving of the roller 16.

[Other components]
As shown in FIG. 5, the flaw detection apparatus 1 may further include a control unit 1 a, a video capture 1 b, a distance measurement unit 1 c, and a data processing unit 1 d such as a personal computer as necessary. Among them, the control unit 1a controls the supply of power to the flaw detector composed of the lower main body 11 and the upper main body 12, and the transmission and detection of radiation in the flaw detector. The video capture 1 b captures image data obtained by the light receiving unit and the semiconductor element or the camera housed in the housing of the lower main body 11. The distance measuring unit 1c is an encoder or a mouse attached to the lower main body 11 or the upper main body 12, and measures the moving distance of the flaw detector (the lower main body 11 and the upper main body 12) with respect to the moving handrail 104. The data processing unit 1d pastes the image data according to the movement distance of the flaw detector based on the image data captured by the video capture 1b and the movement distance data of the flaw detector acquired by the distance measurement unit 1c. Form a panoramic reconstruction image.

<Element Configuration of Moving Handrail Inspection Device>
FIG. 6 is a schematic top view of the lower main body 11 in the flaw detection apparatus 1. As shown in this figure, on the upper surface 11a of the lower main body 11, that is, on the surface holding the moving handrail 104 between the upper main body described above, both ends in the extending direction of the moving handrail 104 to be held The radiation shielding member 13 described above is erected. Further, on the upper surface 11 a of the lower main body 11, in the vicinity of the center between the radiation shielding members 13, a radiation transmitting window 19 is provided as an irradiation path of radiation. Inside the lower main body 11, a light receiving unit for radiation is provided at a position overlapping the radiation transmitting window 19.

  The inner guide mechanism 2 a and the outer guide mechanism 2 b are provided on the upper surface 11 a of the lower main body 11 as described above. The inner guide mechanism 2 a and the outer guide mechanism 2 b both include the following mechanism 20. The outer guide mechanism 2 b further includes guide members 30 on both sides of the follow mechanism 20. Hereinafter, the configurations of the inner guide mechanism 2a and the outer guide mechanism 2b, the follow mechanism 20 constituting them, and the guide member 30 will be described in detail.

[Inner guide mechanism 2a and outer guide mechanism 2b]
FIG. 7 is a schematic side view of the guide mechanism of the flaw detection apparatus 1, and is a view of the outer guide mechanism 2b from the direction A in FIG. In FIG. 7, the inner guide mechanism 2 a has a configuration in which the guide member 30 is removed from the outer guide mechanism 2 b and only the following mechanism 20 is provided. As shown in FIG. 6, the inner guide mechanism 2 a and the outer guide mechanism 2 b are disposed between the pair of radiation shielding members 13 along the relative moving direction x of the moving handrail 104, and the upper surface of the lower main body 11 It is fixed to 11a. Of the inner guide mechanism 2a and the outer guide mechanism 2b as described above, the guide mechanisms disposed on the most upstream side and the most downstream side in the relative moving direction x of the moving handrail 104 are the outer guide mechanism 2b. The other is the inner guide mechanism 2a.

  Further, as shown in FIG. 7, when the moving handrail 104 is held between the lower main body 11 and the upper main body 12 in a predetermined state, the inner guide mechanism 2 a and the outer guide mechanism 2 b back surface of the moving handrail 104. It is inserted into the tube shape of the moving handrail 104 from the side, that is, the canvas surface 104 b side. Further, with the movable handrail 104 held in a predetermined state between the lower main body 11 and the upper main body 12 as described above, the inner guide mechanism 2 a and the outer guide mechanism 2 b together with the lower main body 11 and the upper main body 12 The movable handrail 104 is relatively movable in the extending direction.

  As shown in FIG. 6, the inner guide mechanism 2a and the outer guide mechanism 2b are disposed with a radiation transmission window 19 interposed therebetween as a radiation irradiation path. Thereby, the inner guide mechanism 2a and the outer guide mechanism 2b also serve as a shielding portion for preventing the leakage of radiation to the outside. Furthermore, by disposing the inner guide mechanism 2a and the outer guide mechanism 2b with the radiation transmitting window 19 interposed therebetween, the moving handrail 104 is suppressed with the fluctuation in the width direction of the moving handrail 104 suppressed on the upper surface 11a of the lower main body 11. It can be relatively moved in the extending direction. Therefore, a radiation image can be obtained at a stable position in the width direction of the moving handrail 104, and a panoramic reconstruction image with high accuracy can be formed.

[Following mechanism 20]
The follow-up mechanism 20 constitutes the inner guide mechanism 2a and the outer guide mechanism 2b and contacts the canvas surface 104b of the moving handrail 104 sandwiched between the lower main body 11 and the upper main body 12 and Follow up and down the uneven shape. Such a following mechanism 20 is divided in the width direction of the movable handrail 104 sandwiched between the lower main body 11 and the upper main body 12, that is, in a direction perpendicular to the relative movement direction x of the movable handrail. It is done. Although the number of divisions of the follow-up mechanism 20 is not limited, for example, it is preferable that the follow-up mechanisms 20a, 20b, and 20c be divided into three as illustrated. As a result, as shown in FIG. 8, when the canvas surface 104 b (rear surface) of the moving handrail 104 has a convex portion 104 c for driving the moving handrail 104 under a strong pressure at the central portion in the extending direction of the moving handrail 104. It is possible to cause the following mechanisms 20a, 20b and 20c to follow the respective portions of the convex shape.

  The divided following mechanisms 20a, 20b, and 20c are preferably provided at positions shifted in the relative moving direction x of the movable handrail 104. In the illustrated example, the center following mechanism 20b is provided at a position shifted in the moving direction x with respect to the following mechanisms 20a and 20c on both sides, but the invention is not limited thereto. Thus, by providing the divided following mechanisms 20a, 20b, 20c in the moving direction x, interference between the following mechanisms 20a, 20b, 20c is suppressed, and the following mechanisms divided into smaller widths are provided. It is possible to attach 20a, 20b, 20c. In addition, the rollers 21 of the following mechanisms 20a, 20b, and 20c, which will be described next with reference to FIGS. 9 and 10, can be arranged without gaps in the width direction of the moving handrail 104, so the divided following mechanisms 20a and 20b are divided. , 20c can be prevented from leaking out.

  Hereinafter, details of the configuration of each of the divided following mechanisms 20a, 20b, and 20c will be described by exemplifying the central following mechanism 20b.

  FIG. 9 is a perspective view (part 1) of a follow-up mechanism that constitutes a guide mechanism of the moving handrail flaw detector. Moreover, FIG. 10 is a perspective view (the 2) of the following mechanism which comprises the guide mechanism of a mobile handrail flaw detector. The following mechanism 20b shown in FIGS. 9 and 10 includes a roller 21, a support member 22, a fixing member 23, and an elastic member 24. These are configured as follows.

-Roller 21-
The roller 21 is disposed in contact with the canvas surface 104 b of the moving handrail 104 sandwiched in a predetermined state between the lower main body 11 and the upper main body 12. It is preferable that such a roller 21 has a diameter as large as possible as long as the rotation and vertical movement of the roller 21 are not impeded, and it is preferable that the height of the cylindrical shape (width between bottom surfaces) be large.

-Support member 22-
The support member 22 rotatably supports the roller 21. Such a supporting member 22 is constituted by a flat shielding portion 22a and a pair of roller supporting portions 22b vertically extending from both sides of the shielding portion 22a, and between the tips of the opposing roller supporting portions 22b The shaft portion 21φ of the roller 21 is supported at With the support member 22 supporting the roller 21 at the shaft portion 21φ, the shield 22a of the support member 22 is kept parallel to the rotation axis of the roller 21. It is preferable that the shielding part 22a has a wide area as long as the rotation of the roller 21 and the movement in the vertical direction are not hindered. On the other hand, the roller support portion 22b of the support member 22 may be integrally formed with the shielding portion 22a, and is formed by bending a flat plate member constituting the shielding portion 22a.

  Such a support member 22 has a proximal end side closer to the shield 22a with respect to the tip end portion supporting the roller 21, and the proximal end side shaft portion 22φ can be pivoted by a fixing member 23 described below It is supported. In addition, the shield 22a of the support member 23 is provided with a notch 22c for accommodating a screw 25 for fixing the fixing member 23 described below to the lower main body 11 as necessary. I assume.

-Fixing member 23-
The fixing member 23 fixes the support member 22 to the lower main body 11 so as to be able to swing. Such a fixing member 23 includes a flat fixing portion 23a fixed to the lower main body 11 by a screw 25 and a pair of support walls 23b erected from both sides of the fixing portion 23a. Further, the fixing member 23 supports the roller support portion 22b of the support member 22 at the shaft portion 22φ between the upper ends of the opposing support walls 23b. In a state in which the support member 22 is supported between the support walls 23b, the rotation axis of the roller 21 and the swing axis of the support member 22 are parallel. Such a fixing member 23 may be one in which the fixing portion 23a and the support wall 23b are integrally formed, and the support wall 23b is formed by bending a flat plate member constituting the fixing portion 23a.

  The fixing members 23 of the divided following mechanisms 20a, 20b, and 20c may be integrally formed, but may be separately formed.

-Elastic member 24-
The elastic member 24 applies an elastic force to the support member 22 in the direction in which the roller 21 contacts the canvas surface 104 b of the moving handrail 104 sandwiched in a predetermined state between the lower main body 11 and the upper main body 12. . Such an elastic member 24 is, for example, a tension spring, and is bridged between the lower end of the shielding portion 22a of the support member 22 and the fixing portion 23a of the fixing member 23 so as to lift the roller 21 upward. One or a plurality of such elastic members 24 may be provided for the follow-up mechanism 20b. Here, a configuration in which two elastic members 24 are provided for the central follow-up mechanism 20b is illustrated.

  As shown in FIG. 10, in the follow-up mechanism 20b configured by the above-described members, when a load F is applied to the roller 21 from above, the roller 21 is pushed down. Then, the support member 22 supporting the roller 21 swings, and the lower end side of the shielding portion 22 a of the support member 22 pulls a tension spring which is the elastic member 24. At the same time, the tensile stress of the elastic member 24 causes a force to return the roller 21 upward. Therefore, as shown in FIG. 9, when the load on the roller 21 is removed, the roller 21 returns to its original height position.

  In the above, the configuration of the follow mechanism 20b at the center of the divided follow mechanisms 20a, 20b, and 20c is described as an example. However, the tracking mechanisms 20a and 20c on both sides shown in FIGS. 6 and 7 may have the same shape as the central tracking mechanism 20b, or, as shown, the central tracking mechanism 20b along the moving direction x. The arrangement width may be reduced as a cut shape. In this case, the follow-up mechanisms 20a and 20c on both sides may be configured such that the support portions of the support member 22 and the fixing member 23 are cantilevered, and one elastic member 24 is provided.

  And the following mechanism 20a, 20b, 20c provided with the above-mentioned roller 21, the support member 22, the fixed member 23, and the elastic member 24 is with respect to the canvas surface 104b of the moving handrail 104 although it is a simple structure. The state in which the roller 21 is in contact can be maintained. Further, by providing the elastic member 24 as a tension spring, space saving of the follow-up mechanism 20 can be achieved.

[Guide member 30]
The guide member 30 shown in FIGS. 6 and 7 is provided in the outer guide mechanism 2 b and is for supporting the moving handrail 104 in the width direction from the side of the canvas surface 104 b of the moving handrail 104. The guide member 30 prevents the fluctuation of the position of the moving handrail 104 in the width direction with respect to the outer guide mechanism 2b. Such a guide member 30 is provided so as to sandwich the following mechanisms 20a, 20b and 20c in the outer guide mechanism 2b from both sides. In this case, it is assumed that a guide fixing portion 23c for fixing the guide member 30 to the following mechanism 20 is provided outside the following mechanisms 20a and 20c on both sides integrally with the fixing member 23, for example. Note that these guide fixing portions 23c do not have to be provided in the inner guide mechanism 2a.

  By providing such a guide member 30 with respect to the outer side guide mechanism 2b disposed on the most upstream side and the most downstream side in the relative moving direction x of the moving handrail 104, in the upper surface 11a of the lower main body 11, The moving handrail 104 can be relatively moved in the extending direction with the fluctuation in the width direction of the moving handrail 104 minimized. Since the gap between the edge of the moving handrail 104 in the width direction and the outer guide mechanism 2b can be filled with the guide member 30, radiation leakage from this gap can be suppressed.

«Effect of the embodiment»
As described above, the flaw detection apparatus 1 of the embodiment has a configuration in which the follow-up mechanism 20 of the guide mechanisms 2a and 2b to be in contact with the canvas surface 104b of the moving handrail 104 is divided into a plurality of parts in the width direction of the moving handrail 104. . Thus, it is possible to cause the rollers 21 of the divided following mechanisms 20a, 20b, and 20c to individually and vertically follow the uneven shape of the canvas surface 104b of the moving handrail 104. Therefore, as shown in FIG. 7, when the canvas surface 104b is flat, the rollers 21 of the divided following mechanisms 20a, 20b and 20c are maintained at substantially the same height position. On the other hand, as shown in FIG. 8, the moving handrail 104 ′ has a convex portion 104 c for driving the moving handrail 104 at a central portion in the extending direction of the moving handrail 104 on the canvas surface 104 b on the back side. Even if there is, it becomes possible to cause the following mechanisms 20a, 20b, 20c to follow the respective portions of the convex shape.

  Then, in any of the cases shown in FIGS. 7 and 8, the following mechanisms 20a, 20b, 20b, and 20b divided with respect to the unevenness formed on the canvas surface 104b due to the jumping out or breakage of the wire 104a of the moving handrail 104. It is possible to make the roller 21 of 20c follow.

  From the above, according to the flaw detection apparatus 1 of the embodiment, the gap between the roller 21 can be reduced without depending on the uneven shape of the canvas surface 104b, and radiation from the gap between the roller 21 and the canvas surface 104b can be reduced. It is possible to suppress the leakage of

  In the embodiment described above, the escalator is illustrated as the passenger conveyor 100. However, it is needless to say that the application of the present invention is not limited to the escalator, but can be applied to the general moving handrail flaw detector of a known passenger conveyor including a moving sidewalk.

  Further, the present invention is not limited to the above-described embodiment, and further includes various modifications. For example, the above-described embodiment has been described in detail in order to easily understand the present invention, It is not necessarily limited to what has all the configurations described. Further, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is possible to add, delete, and replace other configurations for part of the configurations of the respective embodiments.

1 ... flaw detector (moving handrail flaw detector for passenger conveyor)
2a: inner guide mechanism 2b: outer guide mechanism 11: lower main body (flaw detector)
12 ... Upper body (fault detector)
12a ... opening 13, 14 ... radiation shielding sheet 19 ... radiation transmission window (irradiation path of radiation)
DESCRIPTION OF SYMBOLS 20 ... Following mechanism 20a, 20b, 20c ... Divided following mechanism 21 ... Roller 22 ... Support member 23 ... Fixing member 24 ... Elastic member 30 ... Guide member 100 ... Passenger conveyor (escalator)
104: Moving handrail 104b: Canvas surface (rear surface)

Claims (7)

A flaw detector that holds a moving handrail of a passenger conveyor and projects radiation
And a guide mechanism attached to the flaw detector in a state of being relatively movable in the extending direction of the movable handrail, inserted on the back side of the movable handrail clamped in a predetermined state in the flaw detector.
A moving handrail flaw detector for a passenger conveyor, wherein the guide mechanism contacts a back surface of the moving handrail clamped in a predetermined state by the flaw detector, and has a following mechanism that follows up and down the uneven shape of the back surface.
A moving handrail flaw detector for a passenger conveyor, wherein the follow-up mechanism is divided into a plurality of parts in the width direction of the moving handrail sandwiched in a predetermined state by the flaw detector. The moving handrail flaw detector for a passenger conveyor according to claim 1, wherein the follow-up mechanism is provided by being divided into three in the width direction of the moving handrail. The moving handrail flaw detector for a passenger conveyor according to claim 1, wherein each of the plurality of divided tracking mechanisms is provided with a position shifted in the relative moving direction of the moving handrail. The moving handrail of the passenger conveyor according to claim 1, wherein at least one of the guide mechanisms is provided on the upstream side and the downstream side of the relative moving direction of the moving handrail across the irradiation path of the radiation in the flaw detector. Flaw detector. Among the guide mechanisms, the guide mechanisms disposed on the most upstream side and the most downstream side of the relative moving direction of the moving handrail are guides for supporting the moving handrail in the width direction from the back side of the moving handrail. The moving handrail flaw detector of the passenger conveyor according to claim 4 provided with a member. The following mechanism is
A roller disposed in contact with the back surface of the moving handrail pinched by the flaw detector;
A support member rotatably supporting the roller;
A fixing member that fixes the support member to the flaw detector in a swingable manner;
The moving handrail flaw detector for a passenger conveyor according to claim 1, further comprising: an elastic member that applies an elastic force to the supporting member in a direction in which the roller contacts the back surface of the moving handrail. The flaw detector has a pair of openings through which both ends of the moving handrail clamped in a predetermined state are derived,
The moving handrail flaw detector for a passenger conveyor according to claim 1, wherein the opening is covered with a radiation shielding member so that relative movement of the flaw detector with respect to the moving handrail can be freely performed.

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