Marker installation jig

Abstract

To provide a marker installation tool that has high positional accuracy and good work efficiency when installing a marker for recognizing a position in real space on a display device that overlays virtual objects in an arrangement according to the position in real space. The device includes two marker holding plates (MJ1) that respectively hold two markers (M1), and a connecting member (MJ3) that adjusts the distance between the two marker holding plates (MJ1).

Description

[Technical field]

[0001] The present invention relates to a marker installation tool that installs markers to allow a display device that overlays virtual objects in an arrangement according to positions in the real space onto the field of view of a worker viewing a real space including an elevator landing and hoistway, or onto an image representing the real space, to recognize positions in the real space. [Background technology]

[0002] Conventionally, in construction work, a method has been proposed in which information required for the work is displayed superimposed on the real space on a display device such as smart glasses worn by a worker while the work is being performed. For example, Patent Document 1 discloses a projection device that scans the real space, recognizes the spatial shape, scales drawing data to fit the real space, and maps and displays it on the real space. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-163466 A Summary of the Invention [Problem to be solved by the invention]

[0004] During the construction stage of a building, there may be a situation where a door is not installed between the elevator shaft and the landing. In such a situation, it is expected that workers will wear smart glasses and perform position recognition work in the real world. In position recognition work, markers must be installed in the real world to recognize the position in the real world. Here, the installation position of the marker greatly affects the position accuracy of the overlay display, so high position accuracy is required. In addition, since the design specifications of the elevator shaft differ depending on the building, a jig that can accommodate this is required.

[0005] One aspect of the present invention aims to provide a marker installation tool that can be used for installing markers to recognize positions in real space on a display device that overlays virtual objects in an arrangement corresponding to positions in real space, and that can be used for installing markers ... that can be used [Means for solving the problem]

[0006] In order to solve the above problems, the marker installation jig of the present invention is a marker installation jig that installs markers so that a display device that overlays virtual objects in an arrangement according to the position in the real space, or in the field of view of a worker viewing a real space including an elevator shaft, or on an image representing the real space, can recognize a position in the real space, and is configured to include two marker holding members that hold two of the markers respectively, and a distance adjustment member that adjusts the distance between the two marker holding members. Effect of the Invention

[0007] According to the present invention, since the markers are provided in two places, the reference position of the overlay display is two places, and the overlay display position can be set more accurately. In addition, since the distance between the marker holding members can be adjusted, it is possible to arrange the two markers so that the distance between the markers is optimal according to the design specifications of the elevator hoistway and landing. [Brief description of the drawings]

[0008] [Figure 1] FIG. 11 is a diagram showing an example of a state in which a virtual object OB is displayed as an overlay. [Diagram 2] 1 is a block diagram showing an outline of the configuration of smart glasses 1 according to an embodiment of the present invention. [Diagram 3] FIG. 2 is a diagram showing a state in which the smart glasses 1 are attached to a work helmet 11. [Figure 4] 1 is a perspective view showing an outline of an elevator hall 200 and a hoistway 102 to which the elevator is to be constructed. [Diagram 5] 1 is a perspective view showing an outline of an opening 101 as viewed from inside a hoistway 102. FIG. [Figure 6] 1A is a plan view, a side view, and a cross-sectional view of a marker installation jig MJ. [Figure 7] 7 is a plan view showing a state in which the distance between a pair of marker holding plates MJ1 in the marker installation jig MJ shown in FIG. 6 is minimized. [Figure 8] 1A to 1C are a plan view, a side view, and a cross-sectional view of a marker installation jig MJ serving as a first modified example. [Figure 9] 9 is a plan view showing a state in which the distance between a pair of marker holding plates MJ1 in the marker installation jig MJ shown in FIG. 8 is minimized. [Figure 10] 13A and 13B are a plan view and a side view of a marker installation jig MJ serving as a modified example 2. [Figure 11] 12 is a side view showing the marker installation jig MJ shown in FIG. 11 in a folded state. [Figure 12] 2 is a flowchart showing a process flow of an elevator installation method according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, one embodiment of the present invention will be described in detail.

[0010] (Overview of smart glass application examples) 3 is a diagram showing a state in which smart glasses (display device) 1 according to this embodiment are attached to a safety helmet 11. In this embodiment, a situation is assumed in which a worker who is constructing an elevator during the construction of a building wears the smart glasses 1 together with the safety helmet 11.

[0011] The smart glasses 1 are optically transparent head-mounted displays. A wearer of the smart glasses 1 can view the external real space and can also view the projected image in the real space. That is, the smart glasses 1 overlay and display virtual objects as construction reference information for the elevator construction in a position corresponding to the position in the real space in the field of view of a worker who is viewing the real space including the elevator landing and hoistway.

[0012] FIG. 1 shows an example of a state in which a virtual object OB is overlaid and displayed in real space. As shown in the figure, a virtual object OB is displayed in a space separated by a predetermined distance from a wall surface 300 in real space. This allows a worker to confirm in real space the position in three-dimensional space where construction work should be performed. This eliminates the need to measure and confirm the position where construction work should be performed in real space with a tape measure, thereby improving workability.

[0013] In this embodiment, smart glasses 1, which are optically transparent head-mounted displays, are used as the display device, but the present invention is not limited to this. For example, a video-transparent head-mounted display that displays both an image of an external real space captured by a camera and an image of a virtual object may be used. In addition, instead of a head-mounted display, a portable information display terminal such as a tablet PC or a notebook PC, or a portable display and camera connected to an information processing device wirelessly or by wire may be used as the display device according to the present invention.

[0014] The virtual object as the construction reference information is displayed based on 3D CAD data or 2D CAD data generated based on the design specifications of the construction target. The CAD data may be generated based on information of a 3D model generated as BIM (Building Information Modeling). In BIM, various information such as the quantity, part number, dimensions, material, performance, and price of each part are included as object information in the 3D model, so at least one of these pieces of information may be displayed as the construction reference information.

[0015] (Details of smart glasses configuration) 2 is a block diagram showing an outline of the configuration of the smart glasses 1. As shown in the figure, the smart glasses 1 include a control unit 2, a projection unit 3, an imaging unit 4, a storage unit 5, a communication unit 6, and an audio input / output unit 7. The control unit 2 is a block that performs various information processing in the smart glasses 1, and includes a display control unit 21, a position recognition unit 22, an input control unit 23, and a warning control unit 24.

[0016] The display control unit 21 controls the projection unit 3 to overlay and display a virtual object as construction reference information related to the construction of the elevator. The projection unit 3 projects an image onto the half mirror, thereby allowing the worker, who is the wearer of the smart glasses 1, to view the projected image while viewing the external real space. The display control unit 21 makes the projected image for the right eye and the projected image for the left eye different from each other, thereby allowing the virtual object to be displayed as if it is three-dimensionally arranged at a predetermined position in the real space. This allows the worker to recognize the construction position as a three-dimensional position in the real space.

[0017] The display control unit 21 reads out the construction reference information including the three-dimensional CAD data or the two-dimensional CAD data stored in the storage unit 5 and controls the display of the virtual object. Here, the three-dimensional CAD data or the two-dimensional CAD data also includes information indicating the positional relationship with an object existing in the real space. In addition, the display control unit 21 controls the display position of the virtual object based on the position in the real space recognized by the position recognition unit 22.

[0018] The display control unit 21 may acquire the construction reference information from the outside via the communication unit 6. The communication unit 6 may communicate with a PC or a server in a local network via a wireless LAN, for example, or with an external server via the Internet. This makes it possible to update the data stored in the storage unit 5 and acquire new data.

[0019] The position recognition unit 22 recognizes the three-dimensional position of the smart glasses 1 in real space and the three-dimensional direction in which the smart glasses 1 are facing by recognizing an image of a marker M1 (details will be described later) placed at a predetermined position in real space captured by the imaging unit 4. In addition, the position recognition unit 22 is capable of position recognition with 6DoF (Degree of Freedom). As a result, once the worker has the position recognized by the position recognition unit 22 using the marker M1, the worker can view the virtual object while maintaining its relative positional relationship with the real space even if the worker subsequently changes or moves the viewing direction.

[0020] The input control unit 23 is a block that receives and processes various instruction inputs from the worker. For example, an instruction input is an input to an input interface as a virtual object. That is, an image as an input interface is displayed in real space as a virtual object by the display control unit 21, and an instruction input from the worker is received by image recognition of the worker's virtual touch with a finger or the like.

[0021] Also, for example, an instruction input from a worker may be accepted by voice input from the voice input / output unit 7. That is, the input control unit 23 recognizes the voice received by the voice input / output unit 7 and recognizes the content of the instruction from the worker by performing voice recognition, thereby accepting the instruction input from the worker.

[0022] Furthermore, an instruction input from a worker may be accepted by an external input device via the communication unit 6. For example, the communication unit 6 communicates with various input devices such as a Bluetooth (registered trademark) compatible input controller or a wireless keyboard, and an instruction input is accepted by an input by a worker to the input device.

[0023] The warning control unit 24 controls some kind of warning to be issued to the worker wearing the smart glasses 1. Examples of the warning method include projecting and displaying the warning content using an overlay display by the display control unit 21, outputting a warning sound or a voice indicating the warning content from the audio input / output unit 7, and the like.

[0024] The warning condition may be that the position recognition unit 22 recognizes that the worker is located within a predetermined area near the elevator shaft. This allows a warning to be issued at the timing when the possibility of the worker falling into the elevator shaft increases, thereby further improving the safety of the worker.

[0025] At least one of the functions of the display control unit 21, the position recognition unit 22, the input control unit 23, and the warning control unit 24 included in the control unit 2 may be realized in an external computer via communication.

[0026] (Example of real space where elevators are installed) Fig. 4 is a perspective view showing an outline of an elevator hall 200 and a hoistway 102, which are the targets of elevator construction. The figure shows a state in which the elevator doors have not yet been installed at a stage in the middle of building construction. In this state, an opening 101 exists between the hall 200 and the hoistway 102 as an entrance for the elevator. The hall 200 has a floor surface 201 and a wall surface 202.

[0027] A marker installation jig MJ is provided on the floor surface 201. The marker installation jig MJ will be described in detail later. Two markers M1 are provided on the marker installation jig MJ. As described above, the markers M1 are used by the position recognition unit 22 to recognize the position in real space by image-recognizing the markers M1 in the captured image. Each of the markers M1 is made of a rectangular planar member, and a predetermined pattern is formed on the surface. By arranging such markers M1 at predetermined positions near the opening 101 on the floor surface 201 of the hall 200, the position recognition unit 22 can accurately recognize the positions of the hall 200 and the elevator shaft 102 in three-dimensional space.

[0028] In this embodiment, two markers are provided for each platform, but the present invention is not limited to this, and one marker, or three or more markers may be provided. The more markers provided, the higher the accuracy of position recognition, but two markers are sufficient for position recognition.

[0029] In addition, in this embodiment, the markers M1 are provided on the floor surface 201, but this is not limiting, and the markers M1 may be provided on the wall surface 202. However, providing the markers M1 on the floor surface 201 is preferable for the following reasons.

[0030] For example, in the middle of the construction of a building in which an elevator is to be installed, various processing is added to the wall surface 202 of the hall 200 from time to time, and there is a high possibility that the shape will change significantly. For example, it is possible that at first, there are no walls, and only pillars are installed, and then at some point, walls are installed. In other words, if the marker is re-installed in response to a change in the environment, the position of the marker will change significantly, and the reference for the position of the overlay display will be changed significantly. In this case, it becomes necessary to significantly change the position of the marker with respect to the data for the overlay display, and depending on the situation, it may become necessary to change the definition of the positional relationship between the marker and the virtual object itself. In contrast, when the marker M1 is installed on the floor surface 201, since the shape of the floor surface 201 changes little during the middle of the construction of a building, even if the height is changed slightly due to beautification processing of the floor surface, for example, and the marker M1 is re-installed, the change in the position of the marker M1 will be relatively small. Therefore, it is possible to deal with this by fine-tuning the data for the overlay display. Details of the data adjustment process accompanying the change in position of the marker M1 will be described later.

[0031] In addition, in this embodiment, the marker M1 is provided at the landing 200, but the marker may be provided in the elevator 102. However, providing the marker M1 at the landing 200 is preferable for the following reasons.

[0032] When performing position recognition by the position recognition unit 22, the worker wears the smart glasses 1 and captures an image of the marker by the imaging unit 4, and the position recognition unit 22 performs position recognition processing. Here, if the marker is provided in the elevator shaft 102, the worker needs to approach the elevator shaft 102 to capture the image of the marker. Since the worker is wearing the smart glasses 1, the field of vision is somewhat limited, and it is assumed that the worker will not be able to check his / her feet sufficiently by concentrating on marker recognition. That is, there is a risk of falling into the elevator shaft 102. In contrast, if the marker M1 is provided at the landing 200, the marker recognition work can be performed in an area away from the opening 101 to the elevator shaft 102 at the landing 200, so that the worker can perform safe work with reduced risk of falling into the elevator shaft 102. In addition, after a door is provided at the opening 101, which is the entrance to the elevator, position recognition by reading the marker can be performed in the landing space in front of the door.

[0033] Also, in the middle of the construction of a building, a safety fence for preventing elevators from falling into the hoistway 102 may be placed in front of the opening 101 to the hoistway 102 at the landing 200. In this case, by providing the marker M1 on the floor surface 201 between the safety fence and the opening 101, the marker M1 is placed in an area where it is difficult for people to enter, and therefore it is possible to prevent the marker M1 from being moved inadvertently.

[0034] The marker M1 is placed at a predetermined position on the floor surface 201, which is specified as a marker installation position in the construction reference information including the three-dimensional CAD data or two-dimensional CAD data. Since the installation position of this marker M1 requires high accuracy in order to accurately match the position in real space with the display position of the virtual object, it is preferable to set the marker M1 based on a predetermined position reference object having a highly accurate placement position in real space. An example of the position reference object is a piano wire 103 provided in the elevator shaft 102.

[0035] FIG. 5 is a perspective view showing an outline of the opening 101 as seen from inside the elevator shaft 102. As shown in the figure, two piano wires 103·103 are hung from predetermined positions at the top of the elevator shaft 102 during the construction stage of a building. In other words, the piano wires 103·103 are placed in fixed positions without being affected by the construction status of each floor. Therefore, by using this piano wire as a position reference object (reference line), it is possible to maintain high accuracy in the installation position of the marker M1. Note that the present invention is not limited to piano wire, and any strong wire member with a sufficiently thin diameter may be used.

[0036] Also, for example, a laser beam may be used as a position reference object. That is, by irradiating the laser beam vertically downward from a predetermined position in the upper part of the elevator shaft 102, or by irradiating the laser beam vertically upward from a predetermined position in the lower part of the elevator shaft 102, the laser beam can be positioned at a fixed position similar to piano wire. However, in the case of laser beam, the thickness of the beam tends to increase as the distance from the light source increases, so there is a possibility that the influence of errors due to the thickness of the beam may occur depending on the height of the building. Also, a reference point (architectural markings) marked on the landing of each floor may be used as a position reference object.

[0037] In addition, multiple landings 200 will be provided for each floor for one elevator, and it is preferable to install the marker in the same location in each landing 200 with respect to the elevator entrance, i.e., in the same relative position with respect to the entrance.

[0038] In many cases, all halls 200 for the same elevator have the same structural arrangement. In this case, since the marker M1 can be installed at the same location for the elevator entrance at each hall 200, the marker installation work can be performed by the same work with the same criteria. Therefore, the marker installation work can be performed efficiently. In addition, the data for overlay display can have a common data structure for the multiple halls 200.

[0039] (Data adjustment process according to the change in the position of marker M1) As described above, the marker M1 is provided on the floor surface 201 at the landing 200. Here, when a building is in the middle of construction, the surface of the floor surface 201 is beautified, and it is considered that the marker M1 will be reinstalled before and after the beautification. The height of the marker M1 will be changed before and after this beautification. Here, the change in the height of the marker M1 before and after the beautification is often on the order of a few mm to a few cm. Also, it is possible to prevent the horizontal position of the marker M1 from changing before and after the beautification.

[0040] If the position of the marker is changed significantly, the positional relationship between the virtual object and the marker must be significantly changed in the data for overlay display. In contrast, even if the marker M1 is repositioned due to floor beautification processing as described above, the change in the marker position is limited to the height direction, and the amount of change is small, so it is relatively easy to correct the data.

[0041] Specifically, the input control unit 23 causes the display control unit 21 to display an interface for changing the height position of the marker M1 as a virtual object, and allows the worker to input. More specifically, an interface displaying input options is displayed, and the worker selects a virtual object of an option corresponding to changing the height of the marker M1 from among them. Then, the worker inputs an amount of height change corresponding to the actual construction work by inputting to a virtual object such as a numeric keypad, and the input control unit 23 corrects the data indicating the positional relationship between the virtual object and the marker in response to this. As described above, the input amount of height change may be received by the worker inputting to the input device by communicating between the communication unit 6 and various input devices such as a wireless keyboard.

[0042] (Details of the marker installation jig) Next, details of the marker installation jig MJ will be described. Fig. 6 shows the configuration of the marker installation jig MJ, where 601 is a plan view seen from a direction perpendicular to the surface of the marker M1, 602 is a side view seen from a direction parallel to the surface of the marker M1, and 603 is a cross-sectional view taken along the line A indicated by 601.

[0043] The marker installation jig MJ includes a pair of marker holding plates (marker holding members) MJ1, and a marker M1 is provided on the surface of each marker holding plate MJ1. That is, the marker holding plate MJ1 includes a mounting surface on which the marker M1 is placed so that the surface of the marker M1 is horizontal. Note that a plate on which the marker M1 is drawn may be attached to the mounting surface of the marker holding plate MJ1, or the marker M1 may be directly drawn on the mounting surface of the marker holding plate MJ1.

[0044] A position matching plate (position reference member) MJ2 is provided so as to extend from one side of the rectangular outline shape of the marker holding plate MJ1 in a direction perpendicular to that side. The position matching plate MJ2 has a horizontal plane perpendicular to a reference line serving as a position reference object, and a first position matching side (reference position presenting part) MJ21 and a second position matching side (reference position presenting part) MJ22 provided on the horizontal plane at positions facing the position where the reference line is expected to be placed at a predetermined distance from at least two directions.

[0045] The first position reference side MJ21 and the second position reference side MJ22 are perpendicular to each other, and a normal line from a mark (scribing line) provided at a predetermined position of the first position reference side MJ21 and a normal line from a mark (scribing line) provided at a predetermined position of the second position reference side MJ22 intersect at one point. This intersection becomes the reference point where the above-mentioned reference line should be placed. That is, the marker installation jig MJ has a reference point provided on each of the pair of marker holding plates MJ1. Then, by arranging the pair of marker holding plates MJ1 so that the pair of reference lines are respectively placed at the pair of reference points, the pair of markers M1 can be accurately placed at the predetermined marker installation positions. Here, by setting the distance between the first position reference side MJ21 and the reference point and the distance between the second position reference side MJ22 and the reference point to about 3 to 10 mm, sufficient placement position accuracy can be achieved.

[0046] 6, a rectangular position matching plate MJ2 is provided so as to extend upward from one upper side of the square outline of the marker holding plate MJ1. The position matching plate MJ2 is detachably connected to the marker holding plate MJ1 with a bolt.

[0047] Moreover, the position matching plate MJ2 is formed with a protruding portion that protrudes in a vertical direction from the outer side of the rectangular position matching plate MJ2 in the left-right direction, and a first position matching side MJ21 is provided on the upper side of the protruding portion. Moreover, a second position matching side MJ22 is provided on the outer side of the position matching plate MJ2 in the left-right direction above the protruding portion. That is, in Fig. 6, the first position matching side MJ21 is provided below the reference point, and the second position matching side MJ22 is provided inside the reference point in the left-right direction.

[0048] In addition, the shape of the position matching plate MJ2 for providing the first position matching side MJ21 and the second position matching side MJ22 is not limited to the shape shown in Fig. 6, and may be any shape in which a normal line from the mark of the first position matching side MJ21 and a normal line from the mark of the second position matching side MJ22 intersect at one reference point. For example, in the position matching plate MJ2 in Fig. 6, the upper end of the position matching plate MJ2 may be curved so that the first position matching side MJ21 is disposed above the reference point. Also, the second position matching side MJ22 may be provided at the tip of the part protruding from the position matching plate MJ2.

[0049] The shape of the position matching plate MJ2 is not limited to the shape shown in FIG. 6, and may be changed as appropriate depending on the relationship between the position where the marker M1 is to be placed and the position of the position reference object. Furthermore, the position matching plate MJ2 may be structured such that the relative positions of the first position matching side MJ21 and the second position matching side MJ22 and the marker M1 are changeable. Examples of structures that allow the relative positions to be changed include a structure in which the length of the position matching plate MJ2 is changeable, and a structure in which at least one of the connection position and connection direction between the position matching plate MJ2 and the marker holding plate MJ1 is changeable. In this case, a marker installation jig MJ that can be used at various sites can be provided.

[0050] The pair of marker holding plates MJ1 are connected to each other by a connecting member (distance adjustment member) MJ3, an intermediate member (distance adjustment member) MJ4, and an axis member MJ5. An intermediate member MJ4 is disposed between the pair of marker holding plates MJ1, and each is connected by a connecting member MJ3. The connecting member MJ3 is structured to be able to change the distance between the marker holding plate MJ1 and the intermediate member MJ4. That is, the connecting member MJ3 makes it possible to change the distance between the pair of marker holding plates MJ1 and the distance between the pair of position matching plates MJ2. This makes it possible to provide a marker installation jig MJ that can be used in various sites.

[0051] In the configuration shown in Fig. 6, since the marker holding plate MJ1 and the position matching plate MJ2 are fixed, the distance between the pair of marker holding plates MJ1 and the distance between the pair of position matching plates MJ2 are changed in conjunction with each other. In contrast, for example, as described above, if at least one of the connection position and connection direction between the position matching plate MJ2 and the marker holding plate MJ1 is changeable, it becomes possible to adjust the distance between the pair of marker holding plates MJ1 and the distance between the pair of position matching plates MJ2 individually. In this case, for example, it becomes possible to arrange the pair of position matching plates MJ2 according to the positions of the pair of piano wires as position reference objects, and to arrange the pair of marker holding plates MJ1 in the optimal position according to the design specifications of the elevator hoistway and landing.

[0052] In the example shown in Figure 6, the left-side marker retaining plate MJ1 is connected to the intermediate member MJ4 by two linearly extending connecting members MJ3, and the right-side marker retaining plate MJ1 is connected to the intermediate member MJ4 by two connecting members MJ3.

[0053] The intermediate member MJ4 has a vertically long shape and is provided with a hollow portion MJ6 that extends linearly in the vertical direction. Another hollow portion MJ6 that extends linearly in the vertical direction is also provided near the inner side surface of the marker holding plate MJ1.

[0054] Of the two connecting members MJ3, an end of one connecting member MJ3 on the marker retaining plate MJ1 side is rotatably held at a fixed position by the marker retaining plate MJ1, and an end on the intermediate member MJ4 side is held slidably along a hollow portion MJ6 provided in the intermediate member MJ4. Similarly, an end of the other connecting member MJ3 on the marker retaining plate MJ1 side is rotatably held at a fixed position by the intermediate member MJ4, and an end on the marker retaining plate MJ1 side is held slidably along the hollow portion MJ6 provided in the marker retaining plate MJ1.

[0055] The position where the end of one connecting member MJ3 on the marker retaining plate MJ1 side is held and the position where the end of the other connecting member MJ3 on the intermediate member MJ4 side is held are located on the same straight line in the direction in which the distance between the marker retaining plate MJ1 and the intermediate member MJ4 is changed (the left-right direction in FIG. 6). In addition, both ends of the hollow portion MJ6 provided in the intermediate member MJ4 and both ends of the hollow portion MJ6 provided in the marker retaining plate MJ1 are located on the same straight line in the direction in which the distance between the marker retaining plate MJ1 and the intermediate member MJ4 is changed (the left-right direction in FIG. 6), at corresponding ends. In other words, one connecting member MJ3 and the other connecting member MJ3 connect the marker retaining plate MJ1 and the intermediate member MJ4 in a crossed state.

[0056] This structure makes it possible to change the distance between the marker holding plate MJ1 and the intermediate member MJ4. Even if the distance between the marker holding plate MJ1 and the intermediate member MJ4 is changed, the in-plane orientation (orientation in the horizontal plane) of the pair of markers M1 can be kept constant.

[0057] In addition, the end of the connecting member MJ3 held in the hollow portion MJ6 can be fixed in position by bolts and nuts, etc., and by fixing the position, the distance between the marker holding plate MJ1 and the intermediate member MJ4 can be fixed.

[0058] The shaft member MJ5 is fixed to the intermediate member MJ4, and is disposed such that a cylindrical rod extends toward the pair of marker holding plates MJ1. As indicated by 602 and 603 in Fig. 6, the shaft member MJ5 is held at a position a predetermined distance below the lower surface of the intermediate member MJ4.

[0059] The marker holding plate MJ1 holds the shaft member MJ5 in a slidable state. That is, the marker holding plate MJ1 moves while being guided by the shaft member MJ5 according to the change in the distance between the marker holding plate MJ1 and the intermediate member MJ4. This makes it possible to keep the normal direction of the faces of the pair of markers M1 constant even if the distance between the marker holding plate MJ1 and the intermediate member MJ4 is changed. In other words, it is possible to keep the faces of the pair of markers M1 parallel to each other even if the distance between the marker holding plate MJ1 and the intermediate member MJ4 is changed.

[0060] Each marker holding plate MJ1 is provided with three bolts (height adjustment members) MJ7. The bolts MJ7 are provided so that their axial direction is perpendicular to the surface of the marker holding plate MJ1, and pass through the marker holding plate MJ1. By rotating the bolts MJ7, the amount of protrusion from the marker holding plate MJ1 toward the floor can be changed. In other words, by adjusting the amount of protrusion of the three bolts MJ7 toward the floor, it is possible to adjust the distance and inclination of the marker holding plate MJ1 relative to the floor.

[0061] As a result, even if the floor height is changed due to floor beautification processing as described above, the heightwise position of the marker M1 can be kept constant by adjusting the amount that the three bolts MJ7 protrude toward the floor. This makes it possible to maintain a high level of positional accuracy of the overlay display without the need to adjust the position of the overlay display. Also, because one marker holding plate MJ1 is supported on the floor by three bolts MJ7, the marker M1 can be placed without rattling due to the three-point support.

[0062] The bolt MJ7 may function as an anchor bolt (fixing member) for the floor surface. This allows the marker installation jig MJ to be fixed and placed at a predetermined location, preventing it from shifting due to some disturbance from the position where it is placed according to the reference line. As a fixing member for the marker installation jig MJ, an engagement member that engages with a predetermined member on the floor surface to fix the position may be provided on the marker installation jig MJ. An example of the predetermined member on the floor surface is a recessed portion in a threshold where an elevator door is provided. For simplicity, the marker installation jig MJ may be fixed by being attached to the floor surface with tape.

[0063] 7 shows the marker installation jig MJ shown in FIG. 6 in a state where the distance between the pair of marker holding plates MJ1 is minimized. In this state, the left marker holding plate MJ1 and the intermediate member MJ4 are in contact with each other, and the right marker holding plate MJ1 and the intermediate member MJ4 are also in contact with each other. In addition, the position matching plate MJ2 is attached to the marker holding plate MJ1 so as to be located inside the marker holding plate MJ1 when viewed from a direction perpendicular to the surface of the marker holding plate MJ1. As described above, the position matching plate MJ2 is connected to the marker holding plate MJ1 with bolts, and by removing the bolts and changing the mounting direction, it is possible to switch between a state in which the position matching plate MJ2 protrudes outward and a state in which it is stored inside.

[0064] In this way, the marker installation jig MJ has a structure that allows it to be folded up compactly, which reduces the storage space required when transporting it to the site or when storing it when not in use.

[0065] (Modification 1 of the marker installation jig) Fig. 8 shows modified example 1 of the marker installation jig MJ, where 801 is a plan view seen from a direction perpendicular to the surface of the marker M1, 802 is a side view seen from a direction parallel to the surface of the marker M1, and 803 is a cross-sectional view taken along the line B shown in 801. This modified example 1 differs from the configuration shown in Fig. 6 in the configuration for connecting a pair of marker holding plates MJ1, but the configurations of the marker holding plates MJ1 and the position matching plate MJ2 are the same.

[0066] In the first modification, the pair of marker holding plates MJ1 are connected to each other by two connecting shafts (distance adjustment members) MJ8. The pair of marker holding plates MJ1 can each move along the two connecting shafts MJ8, which makes it possible to change the distance between the pair of marker holding plates MJ1 and the distance between the pair of position matching plates MJ2. Therefore, it is possible to provide a marker installation jig MJ that can be used in a variety of work sites.

[0067] The connecting shaft MJ8 is a cylindrical rod arranged in a direction parallel to the moving direction of the marker holding plate MJ1. As shown by 802 and 803 in Fig. 8, the connecting shaft MJ8 is held at a position a predetermined distance above the upper surface of the marker holding plate MJ1.

[0068] In the marker holding plate MJ1, the connecting shaft MJ8 is held in a state in which the direction of the connecting shaft MJ8 is fixed and in a slidable state. That is, the marker holding plate MJ1 moves while being guided by the two connecting shafts MJ8 in response to a change in the distance between the pair of marker holding plates MJ1. This makes it possible to keep the normal direction of the faces of the pair of markers M1 constant even if the distance between the pair of marker holding plates MJ1 is changed. In other words, it is possible to keep the faces of the pair of markers M1 parallel to each other even if the distance between the marker holding plate MJ1 and the intermediate member MJ4 is changed. Also, the orientation within the plane of the pair of markers M1 (the orientation within the horizontal plane) can be kept constant.

[0069] The portion of the marker holding plate MJ1 that holds the connecting shaft MJ8 can be fixed in position by a structure that presses the connecting shaft MJ8 with a bolt. By fixing the position in this way, it becomes possible to fix the distance between the pair of marker holding plates MJ1.

[0070] Fig. 9 shows the marker installation jig MJ shown in Fig. 8 in a state where the distance between a pair of marker holding plates MJ1 is minimized. In this state, the left marker holding plate MJ1 and the right marker holding plate MJ1 are in contact with each other. In addition, the position matching plate MJ2 is attached to the marker holding plate MJ1 so as to be located inside the marker holding plate MJ1 when viewed from a direction perpendicular to the surface of the marker holding plate MJ1.

[0071] In this way, even in variant example 1, the marker installation jig MJ has a structure that allows it to be folded compactly, thereby reducing the storage space required when transporting it to the site or storing it when not in use.

[0072] (Modification 2 of the marker installation jig) Fig. 10 shows modified example 2 of the marker installation jig MJ, where 1001 is a plan view seen from a direction perpendicular to the surface of the marker M1, and 1002 is a side view seen from a direction parallel to the surface of the marker M1. This modified example 2 is different from the configuration shown in Fig. 6 in the configuration for connecting the pair of marker holding plates MJ1, but the configurations of the marker holding plates MJ1 and the position matching plate MJ2 are the same.

[0073] In the second modification, a pair of marker holding plates MJ1 are connected to each other via two connecting plates MJ9. The marker holding plates MJ1 are connected to the connecting plates MJ9 via a first hinge MJ10. The two connecting plates MJ9 are also connected to each other via a second hinge MJ11.

[0074] 1101 in Fig. 11 shows a side view of the marker holding plate MJ1 folded by the first hinge MJ10, as viewed in a direction parallel to the surface of the marker M1. As shown in the figure, the marker holding plate MJ1 is folded by the first hinge MJ10 so that the top surface of the marker holding plate MJ1 faces the top surface of the connecting plate MJ9. Also, 1102 in Fig. 11 shows a side view of the marker holding plate MJ1 further folded by the second hinge MJ11 from the state shown in 1101, as viewed in a direction parallel to the surface of the marker M1. As shown in the figure, the marker holding plate MJ1 is folded by the second hinge MJ11 so that the surfaces of the marker holding plate MJ1 from which the bolt MJ7 protrudes face each other.

[0075] Thus, in variant example 2, the marker installation jig MJ has a structure that allows it to be folded up very compactly, thereby reducing the storage space required when transporting it to the site or when storing it when not in use.

[0076] 10, the mounting position of the position matching plate MJ2 relative to the marker holding plate MJ1 may be changeable by, for example, a slide mechanism. In this case, the distance between a pair of position matching plates MJ2 can be changed. Also, a structure may be provided in which the distance between the markers M1 and the distance between the position matching plates MJ2 can be changed by connecting multiple connecting plates with hinges to form a bellows structure. In this structure, if each hinge can be fixed individually, it is also possible to fix the distance between the markers M1 and the distance between the position matching plates MJ2 in a fixed state.

[0077] (Elevator installation method process flow) Next, a process flow of the elevator installation method according to this embodiment will be described with reference to Fig. 12. When elevator installation is started, first in step 1 (hereinafter referred to as S1), a marker installation jig MJ having a marker M1 provided thereon is installed at a predetermined position in the landing 200. At this time, as described above, the marker installation jig MJ is installed with reference to a position reference object such as the piano wire 103.

[0078] Next, in S2, the worker wears the smart glasses 1, captures an image of the marker with the imaging unit 4, and causes the position recognition unit 22 to perform position recognition processing. After the position recognition is performed, in S3, the display control unit 21 performs an overlay display of the virtual object. Once the worker has caused the position recognition unit 22 to recognize the position with the marker M1, the worker can visually recognize the virtual object while maintaining its relative positional relationship with the real space even if the worker subsequently changes the viewing direction or moves. In this state, in S4, the worker performs construction work while checking the construction reference information overlaid and displayed by the display control unit 21. Note that the construction work includes not only the actual construction work but also the check work after the construction work is performed. Then, in S5, the end of the construction work is confirmed, and if No in S5, i.e., the construction work is continuing, the processing from S3 is repeated, and if Yes in S5, i.e., the construction work is completed, the processing is terminated.

[0079] The above construction method and smart glasses 1 enable safe and efficient construction of elevators. Such effects will also contribute to the achievement of Goal 11.c of the Sustainable Development Goals (SDGs) advocated by the United Nations, which states, for example, "Support the development of sustainable and resilient buildings using locally sourced materials in least developed countries, including through financial and technical assistance."

[0080] [Software implementation example] The functions of the smart glasses 1 (hereinafter referred to as the "device") can be realized by a program for causing a computer to function as the device, and a program for causing a computer to function as each control block of the device (particularly each part included in the control unit 2).

[0081] In this case, the device includes a computer having at least one control device (e.g., a processor) and at least one storage device (e.g., a memory) as hardware for executing the program. The control device and storage device execute the program to realize each function described in each of the above embodiments.

[0082] The program may be non-transitory and may be recorded in one or more computer-readable recording media. The recording media may or may not be included in the device. In the latter case, the program may be provided to the device via any wired or wireless transmission medium.

[0083] In addition, some or all of the functions of each of the control blocks can be realized by a logic circuit. For example, an integrated circuit in which a logic circuit that functions as each of the control blocks is formed is also included in the scope of the present invention. In addition, the functions of each of the control blocks can be realized by, for example, a quantum computer.

[0084] Furthermore, each process described in each of the above embodiments may be executed by AI (Artificial Intelligence). In this case, the AI ​​may be executed by the control device or another device (for example, an edge computer or a cloud server).

[0085] (summary) The marker installation jig of aspect 1 of the present invention is a marker installation jig that installs markers so that a display device that overlays virtual objects on an image representing a real space, including an elevator shaft, can recognize a position in the real space, and is configured to include two marker holding members that hold two of the markers respectively, and a distance adjustment member that adjusts the distance between the two marker holding members.

[0086] According to the above configuration, since the markers are provided in two places, the reference position of the overlay display is two places, and the overlay display position can be set more accurately. Also, since the distance between the marker holding members can be adjusted, the two markers can be arranged so that the distance between the markers is optimal according to the design specifications of the elevator hoistway and landing.

[0087] A marker installation jig according to a second aspect of the present invention may be configured in the above-mentioned first aspect such that the marker holding member includes a mounting surface on which the marker is mounted so that the surface of the marker is horizontal.

[0088] According to the above configuration, since the marker is placed on a horizontal placement surface, the marker can be placed on the floor surface of an elevator hall, for example. Here, for example, during the construction stage of a building in which an elevator is to be installed, various processing is added from time to time to the walls of the hall, and there is a high possibility that the shape will change significantly. In contrast, since the shape of the floor surface changes little during the construction stage of a building, even if the height is changed slightly due to floor beautification processing, for example, and the marker is re-installed, the change in the position of the marker will be relatively small. Therefore, the amount of various adjustments required for the change in the position of the marker can be reduced.

[0089] The marker installation jig of aspect 3 of the present invention may be configured in accordance with aspect 1 above, further comprising a position reference member that indicates to the worker the relative position with respect to a reference line that is provided vertically within the elevator shaft as a position reference.

[0090] According to the above configuration, the worker can easily install the marker in an appropriate position by adjusting the position of the marker installation jig while visually checking the relative position with respect to a reference line such as a piano wire or laser light. Therefore, it is possible to provide a marker installation jig that has high positional accuracy and good work efficiency.

[0091] A marker installation jig according to aspect 4 of the present invention may be configured in accordance with aspect 2 above, such that the marker holding member is provided with a height adjustment member for changing the height of the placement surface from the surface on which the marker holding member is placed.

[0092] According to the above configuration, even if the height of a building is changed during construction, for example, due to floor beautification, the height adjustment member can keep the height position of the marker constant before and after the change. Therefore, it is possible to maintain high positional accuracy of the overlay display without the need to adjust the position of the overlay display by the display device.

[0093] The marker installation jig according to a fifth aspect of the present invention may be configured in accordance with the first aspect above, further comprising a fixing member that fixes the placement position of the marker installation jig in the real space.

[0094] According to the above configuration, the marker installation jig is fixed and placed in a predetermined location, so that it is possible to prevent the marker installation jig from shifting from the position where it is placed in accordance with the reference line due to some kind of disturbance.

[0095] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0096] 1. Smart glasses (display device) 2. Control section 3 Projection section 4. Imaging unit 5 Storage section 6. Communications Department 7 Audio input / output section 11 Safety helmet 21 Display control unit 22 Position recognition part 23 Input control section 24 Warning control section 101 Opening 102 Hoistway 103, 103·103 Piano wire 200 platform 201 Floor 202, 300 Wall M1 Marker MJ marker installation jig MJ1 Marker holder MJ2 Position reference plate (position reference component) MJ21 1st position matching edge (reference position display part) MJ22 Second position reference edge (reference position presentation part) MJ3 Connection parts (distance adjustment parts) MJ4 Intermediate part (distance adjustment part) MJ5 shaft member MJ6 hollow part MJ7 Bolt MJ8 connecting shaft (distance adjustment part) MJ9 connection plate MJ10 1st hinge MJ11 2nd hinge

Claims

1. A marker installation tool for installing a marker on a display device that displays a virtual object in an overlay in a field of view of a worker viewing a real space including an elevator shaft or an image representing the real space in an arrangement according to a position in the real space, so that the marker can be used to recognize a position in the real space, Two marker holding members for holding the two markers, respectively; A marker installation jig comprising: a distance adjustment member that adjusts the distance between the two marker holding members.

2. The marker installation tool according to claim 1 , wherein the marker holding member includes a mounting surface on which the marker is mounted so that a surface of the marker is horizontal.

3. The marker installation jig according to claim 1 , further comprising a position reference member that indicates to the worker a relative position with respect to a reference line that is provided in the elevator shaft in a vertical direction as a position reference.

4. The marker installation tool according to claim 2 , wherein the marker holding member is provided with a height adjustment member for changing the height of the placement surface from a surface on which the marker holding member is placed.

5. The marker installation jig according to claim 1 , further comprising a fixing member that fixes a placement position of the marker installation jig in the real space.

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