JP2018177491A - Detection system and detection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique that makes it possible to check, without relying on visual check by an operator or the like, whether a service platform has extended beyond a regulation line or not.SOLUTION: A detection system according to one aspect of the present invention is a detection system for detecting whether a service platform provided so as to be vertically and horizontally movable in a vehicle for work at a high position has extended beyond a regulation line on a road surface or not, and comprises: an optical sensor mounted on the service platform so as to be able to emit light toward the road surface below the floor of the service platform and receive the light reflected from the road surface; a reflection member configured to reflect, at a reflection coefficient different from that of the road surface, light emitted from the optical sensor, the reflection member being disposed along the regulation line on the road surface; and an alarm mounted on the service platform, the alarm being configured to alarm using, as a trigger, the reception of the light, reflected by the reflection member, by the optical sensor.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a detection system and a detection method.

  When working at a high place such as inspection or repair of lining concrete of a tunnel, a high-level work vehicle exemplified in Patent Document 1 may be used. A control panel is provided on the work platform of the high-altitude work vehicle, and a worker present on the work platform can move the work platform vertically and horizontally by operating the control panel.

  When using a work vehicle such as this (especially when working at a high place on a road where the vehicle passes), if the work table is freely moved, there is an accident such as the work table touching the passing vehicle It may occur. Therefore, a control line that defines the work range may be provided on the road surface, and the work table may be moved to perform desired height work while confirming that the work table does not extend the control line. Heretofore, it has been confirmed by the method shown in FIG. 1 whether or not the work bench is sticking out of the control line.

  FIG. 1 schematically exemplifies a conventional example of a method of checking whether the work bench 101 of the high-height work vehicle 100 is out of the regulation line. As shown in FIG. 1, in the conventional method, the laser pointer 103 is attached to the bottom of the work floor 102 of the work bench 101, and laser light is emitted from the attached laser pointer 103 toward the road surface. Then, points of laser light are formed on the road surface.

  The position of the laser light point formed on the road surface corresponds to the position of the work bench 101. Conventionally, it has been confirmed whether or not the work bench 101 is out of the regulation line depending on whether the point of the laser light exceeds the regulation line. That is, a worker on the work bench 101 visually checks whether the position of the laser light point exceeds the regulation line, and moves the work bench 101 so as not to exceed the regulation line. I was going.

Japanese Patent Application Laid-Open No. 10-067493

  In the tunnel peeling countermeasure construction, a curing enclosure is performed to cover the work area and the work table 101 with a sheet, a plate, or the like so that the adhesive, the paint, and the like do not scatter from the work area and the work floor 102 of the work vehicle 100. Then, the worker enters the curing enclosure and can not visually confirm the position of the laser light point formed on the road surface. As a result, the worker may not notice that the work bench 101 is sticking out of the regulation line.

  In this case, a traffic instructor outside the cure enclosure confirms the point position of the laser light, and when the point crosses the regulation line, it is communicated by radio or the like to the worker inside the cure enclosure. , Ensure the safety of work. However, the traffic instructors who are under traffic control are mainly directing traffic outside the control area so as to prevent vehicles from entering the control area. Therefore, it is difficult for a traffic guider performing traffic guidance to confirm the point position of the laser light formed in the regulation area.

  On the other hand, it may be considered to allocate dedicated personnel other than the traffic guide in order to confirm the position of the work bench 101. However, the work bench 101 is not always moving. Therefore, it is useless to arrange dedicated personnel who check the position of the work bench 101, and the operation cost becomes high.

  In addition, although the laser beam is emitted directly downward from the laser pointer 103 attached to the bottom surface of the work floor 102, if this laser beam is reflected to some member, the worker, the driver of the passing vehicle, etc. There is a possibility that laser light may enter the eyes of the people present in the surroundings. Therefore, in order to avoid such a danger, care must be taken in handling the laser light.

  The present invention, in one aspect, has been made in consideration of such a point, and the purpose thereof is to make it possible to confirm whether the work bench is over the regulation line or not by visual inspection by workers etc. Provide the technology to

  The present invention adopts the following configuration in order to solve the problems described above.

  That is, a detection system according to one aspect of the present invention is a work vehicle provided with a work platform provided to be movable in the vertical direction and the horizontal direction, which is located below the floor of the work bench, in an elevated work vehicle for working at high places. A detection system for detecting whether or not a restriction line of a road surface located in the road surface is projected, and light is emitted toward the road surface below the floor of the work bench and reflected on the road surface An optical sensor mounted on the work bench so as to be capable of receiving reflected light, and a reflecting member configured to reflect light emitted from the optical sensor with a reflectance different from that of the road surface, the road surface And an alarm attached to the work table, the alarm being triggered by the optical sensor receiving the reflected light reflected by the reflection member. Structure And a alarm that is.

  In the above configuration, the optical sensor that emits light to the road surface is disposed on the work bench, and the reflecting member that reflects the light from the optical sensor with a reflectance different from that of the road surface is disposed on the road surface. For example, the reflective member is configured to reflect the light from the optical sensor with a higher reflectivity than the road surface. Thereby, the optical sensor can distinguish between the reflected light from the road surface and the reflected light from the reflecting member. And the alarm machine arrange | positioned at a workbench is comprised so that an alarm may be triggered by having received with the optical sensor the reflected light reflected by the reflection member. That is, when the workbench is moved, when the portion where the optical sensor of the workbench is disposed is positioned on the reflection member disposed along the restriction line, the reflected light from the reflection member is The optical sensor will receive light, which will cause the alarm to emit an alarm. Therefore, according to the said structure, the worker can know that the work bench exceeded the control line by the alarm which an alarm emits. Therefore, it becomes possible to confirm whether the workbench has exceeded the regulation line without visual inspection by a worker or the like.

  Further, in the detection system according to the one aspect, the light irradiated by the optical sensor may be infrared light. According to this configuration, it is possible to provide a detection system that is less susceptible to the influence of visible light around it.

  In the detection system according to the one aspect, a plurality of the optical sensors may be attached to the workbench. According to the configuration, by appropriately arranging the plurality of optical sensors on the workbench, it is possible to reduce the dependence of the direction of the workbench on the detection of whether or not the workbench is sticking out of the restriction line.

  Further, in the detection system according to the one aspect described above, the floor of the work bench may be formed in a rectangular shape, and two optical sensors among the plurality of optical sensors are disposed at both ends of one side of the rectangular shape. You may According to the said structure, it can be detected reliably whether the work bench has protruded the control line in the one side which arrange | positioned a pair of optical sensor in the both ends. Therefore, even when the control line is positioned on the front, rear, left or right of the workbench, it can be accurately checked whether the workbench exceeds the control line.

  Further, in the detection system according to the one aspect described above, a curing enclosure may be provided so as to cover the work table and a work place where a worker on the work table performs work. If a curing enclosure is provided so as to cover the workbench and the work area, scattering and falling of materials used for work can be prevented, while workers on the workbench will get into the curing enclosure and the external situation It will be difficult to check. Even in such a case, the worker can check whether the workbench is out of the regulation line based on the operation of the alarm. That is, the detection system according to the present invention exerts an excellent effect in the case where a curing enclosure is provided so as to cover the workbench and the work area.

  Further, in the detection system according to the one aspect described above, the reflective member includes a flexible band disposed on the road surface, and a reflective tape attached onto the flexible band. Good. According to the configuration, it is possible to suppress the waving of the reflecting member due to the unevenness of the road surface, and thereby it is possible to reduce the reflection failure of the light irradiated from the optical sensor by the waving of the reflecting member. Moreover, according to the said structure, it can suppress that the said reflecting member is blown off by the wind pressure of the passing vehicle which passes the vicinity which arrange | positions a reflecting member.

  Further, according to the detection method according to one aspect of the present invention, in an elevated work vehicle for performing work at a high place, a work bench provided movably in the vertical direction and in the horizontal direction is lower than the floor of the work bench. A detection method for detecting whether or not the restriction line of the road surface located in the road surface is extended, and light is emitted toward the road surface below the floor of the work table by the optical sensor attached to the work table The step of irradiating the light, the step of receiving the reflected light reflected by the road surface by the optical sensor, and the reflection configured to reflect the light emitted from the optical sensor with a reflectance different from that of the road surface. It is a member, The step which determines whether the said optical sensor light-received the reflected light reflected by the reflection member arrange | positioned along the regulation line of the said road surface, The reflection reflected by the said reflection member When the said optical sensor receives, and a step of issuing an alarm by alarm attached to the worktable.

  According to the present invention, it is possible to provide a technology capable of confirming whether the work bench exceeds the regulation line without visual inspection by a worker or the like.

FIG. 1 exemplarily illustrates a conventional example of a method of checking whether a workbench is sticking out of a regulation line. FIG. 2 schematically illustrates a scene in which the detection system according to the embodiment is applied to an aerial work vehicle. FIG. 3 schematically illustrates the arrangement of the optical sensor according to the embodiment. FIG. 4 schematically illustrates a use scene of the detection system according to the embodiment. FIG. 5 schematically illustrates a use scene of the detection system according to the embodiment. FIG. 6 schematically illustrates an example of the configuration of a detection system according to a modification.

  Hereinafter, an embodiment according to one aspect of the present invention (hereinafter, also referred to as “the present embodiment”) will be described based on the drawings. However, the embodiment described below is merely an illustration of the present invention in all respects. Various modifications or variations may be made without departing from the scope of the present invention. That is, in the implementation of the present invention, a specific configuration according to the embodiment may be appropriately adopted.

Section 1 Configuration Example First, the configuration of the detection system 1 according to the present embodiment will be described with reference to FIG. FIG. 2 schematically illustrates a scene in which the detection system 1 according to the present embodiment is applied to the work vehicle 10. The lift truck 10 illustrated in FIG. 2 includes a boom 11 extending from a vehicle body, and a work bench 12 provided so as to be vertically and horizontally movable by driving the boom 11. The work bench 12 has a work floor 13 on which workers can ride. This work floor 13 corresponds to the "work bench floor" of the present invention. A publicly known aerial work vehicle can be used for such a aerial work vehicle 10. In addition, the “high-altitude work vehicle” includes a work device and a travel device. The work device is fixed to the travel device, the work floor is attached to the tip of the movable part of the work device, and a worker gets on the work floor. Refers to a vehicle that

  The detection system 1 detects whether or not the work bench 12 protrudes the restriction line 5 of the road surface located below the work floor 13 in the work vehicle 10 for working at such a high place. Detection system, and includes an optical sensor 2, a reflecting member 3, and an alarm 4. Each component will be described below.

(Optical sensor)
First, the optical sensor 2 will be described with further reference to FIG. FIG. 3 schematically illustrates an arrangement example of the optical sensor 2. The optical sensor 2 emits light toward the road surface below the work floor 13 and is mounted on the work bench 12 so as to be able to receive the reflected light reflected by the road surface. Specifically, the optical sensor 2 is attached to the bottom surface of the work floor 13, the fence of the work bench, and the like downward. In the example of FIG. 3, the work floor 13 is formed in a rectangular shape, and the optical sensor 2 is attached to one of the four corners of the bottom surface of the work floor 13. In addition, this "rectangular shape" includes a rectangular shape with rounded corners, in addition to so-called rectangular and square with sharp corners.

  As such an optical sensor 2, a known regressive reflection type photoelectric sensor provided with a light emitting element for emitting light, a light receiving element for receiving reflected light, and a control circuit for controlling each element can be used. Moreover, the zone | band of the light which the optical sensor 2 irradiates may be suitably selected according to embodiment. For example, the light emitted by the optical sensor 2 may be infrared light. When infrared light is used, for example, a known infrared sensor such as an infrared sensor (model number: PR-11BE) manufactured by Takenaka Engineering Co., Ltd. can be used as the optical sensor 2. This makes it possible to provide the detection system 1 that is less susceptible to the influence of visible light around it.

(Reflecting member)
Next, the reflecting member 3 will be described. The reflecting member 3 is configured to reflect the light emitted from the optical sensor 2 with a reflectance different from that of the road surface. When the road surface is relatively easy to reflect the light emitted from the optical sensor 2, the reflecting member 3 is configured to reflect the light emitted from the optical sensor 2 at a lower reflectance than the road surface. May be done. When the road surface is relatively difficult to reflect the light emitted from the optical sensor 2, the reflecting member 3 reflects the light emitted from the optical sensor 2 at a higher reflectance than the road surface. May be configured. The reflectance of the reflecting member 3 can be appropriately set depending on the material, processing of the reflecting surface, and the like.

  In the present embodiment, a rubber plate 31 disposed on a road surface and a reflective tape 32 stuck on the rubber plate 31 are provided. The rubber plate 31 corresponds to the "flexible band" of the present invention. For example, as the rubber plate 31, a commercially available rubber plate having a thickness of 10 mm can be used. In addition, the kind of flexible band material may not be restricted to such a rubber plate, and may be appropriately selected according to the embodiment. For example, ethylene / vinyl acetate copolymer resin may be used for the flexible band material.

  For the reflective tape 32, a known tape material may be used. When the reflectance of light is increased more than the road surface, for example, a known reflex tape such as a reflex tape manufactured by Cat Eye Co., Ltd. (model number: RR1C_2295) can be used. When the light emitted from the optical sensor 2 is visible light or infrared light and the light reflectance is lower than that of the road surface, for example, a black tape can be used as the reflective tape 32. Thereby, the light quantity of the reflected light reflected by the road surface and the light quantity of the reflected light reflected by the reflection member 3 (reflection tape 32) can be made different.

  The reflection member 3 is disposed along the restriction line 5. The control line 5 defines a working range and restricts the ingress of persons other than the working person and vehicles inside along the outer edge thereof while restricting the intrusion of the working person and the vehicle and equipment used for the work. It is a fictitious or real line that divides the area so that it does not go beyond it. The restriction line 5 may be provided separately from the reflecting member 3 or may be provided integrally with the reflecting member 3. Further, the restriction line 5 may be defined by the reflecting member 3. In other words, “arranged along the restriction line” means that the road surface or the surface of the road is colored or colored cone (registered) when the restriction line 5 is provided separately or integrally with the reflecting member 3. It refers to being disposed in the vicinity of or on the control line 5 defined by a trade mark), a cone bar, or the like. Moreover, when the control line 5 is determined by the reflective member 3, “disposed along the control line” indicates that the reflective member 3 is disposed as the control line.

(Alarm)
The alarm device 4 is configured to emit an alarm when triggered by the optical sensor 2 receiving the light reflected by the reflection member 3.

  As described above, the light amount of the reflected light reflected by the road surface is different from the light amount of the reflected light reflected by the reflection member 3 (reflection tape 32). Therefore, based on the amount of light received by the optical sensor 2, it is determined whether or not the optical sensor 2 receives the reflected light reflected by the reflecting member 3, ie, the place where the light irradiated by the optical sensor 2 is reflected. be able to. This determination may be performed by the optical sensor 2, may be performed by the alarm 4, or may be connected to a device other than the optical sensor 2 and the alarm 4, for example, the optical sensor 2 (not shown) ) May be performed.

  When the reflection member 3 is configured to have a reflectance lower than that of the road surface, the optical sensor 2 may not be able to detect the reflected light from the reflection member 3. When "the optical sensor receives the reflected light reflected by the reflecting member", when the reflecting member is configured to have a lower reflectance than such a road surface, the light from the optical sensor is reflected. Includes a state in which the optical sensor can not detect the reflected light.

  A known alarm can be used for the alarm 4. For example, as the alarm device 4, an LED flash multi siren (model number: LFS-12R) manufactured by Takenaka Engineering Co., Ltd. can be used. The type of alarm may be appropriately selected according to the embodiment. In the case of providing a rotating light, a display or the like, the alarm 4 may perform an alarm through sight. Moreover, when the alarm 4 is equipped with a speaker, you may warn through hearing. Also, the alarm 4 may issue an alarm through both sight and hearing.

  The alarm 4 is attached to the work table 12. The alarm 4 is preferably arranged on the workbench 12 at a position where a worker on the workbench 12, in particular, a worker who moves the workbench 12 can confirm the warning. For example, the alarm 4 is disposed near a control panel (not shown) provided on the work bench 12.

Section 2 Use Example Next, a method of using the detection system 1 will be described with reference to FIGS. 4 and 5. FIG.4 and FIG.5 illustrates the use scene of the detection system 1 which concerns on this embodiment typically. 4 and 5 illustrate a scene in which the detection system 1 is used to prevent the tunnel 6 from peeling off. However, the usage target of the detection system 1 may not be limited to such an example, and may be appropriately selected according to the embodiment. Also, the method of use described below corresponds to the "detection method" of the present invention. However, the usage of the detection system 1 described below is only an example, and each process may be changed as much as possible. About the usage method of the detection system 1 demonstrated below, according to embodiment, the omission, substitution, and addition of a process are suitably possible.

  First, as preparation for the detection system 1, light is emitted toward the road surface, and the optical sensor 2 is attached to the work bench 12 of the work vehicle 10 so as to be able to receive the reflected light reflected on the road surface. For example, the optical sensor 2 is attached to the bottom surface of the work floor 13, the fence of the work table 12, or the like in a downward direction. Further, the reflecting member 3 is disposed along the restriction line 5 on the road surface. For example, the rubber plate 31 is disposed on the restriction wire 5, and the reflective tape 32 is attached on the rubber plate 31. Further, the alarm 4 is attached to the work table 12. For example, the alarm 4 is disposed in the vicinity of a control panel (not shown) on the work table 12.

  Further, as a preparation for the work of the tunnel 6 against peeling off, a work environment 12 and a work environment where a worker 8 on the work environment 12 performs work are provided to cover a work area. The curing enclosure 7 may be formed of a sheet, a plate or the like by a known method. By providing the curing enclosure 7, it is possible to prevent the adhesive, the paint, and the like from scattering from the work bench 12 and the work area.

  Next, the work of the countermeasure for peeling off of the tunnel 6 is started, and the irradiation of light toward the road surface below the work floor 13 by the optical sensor 2 attached to the work table 12 is started. The light irradiation by the optical sensor 2 may be performed continuously, periodically or irregularly. When light is emitted toward the road surface, the optical sensor 2 receives the reflected light reflected by the road surface.

  The reflecting member 3 disposed on the road surface is configured to reflect the light emitted from the optical sensor 2 with a reflectance different from that of the road surface. Therefore, the light amount of the reflected light reflected by the road surface is different from the light amount of the reflected light reflected by the reflecting member 3. Therefore, by determining the amount of light received by the optical sensor 2 as a threshold value, it is determined whether the optical sensor 2 receives the reflected light reflected by the reflecting member 3 or not.

  When it is judged that the optical sensor 2 does not receive the reflected light reflected by the reflecting member 3, that is, the optical sensor 2 receives the reflected light reflected by the road surface, as shown in FIG. 4. As a matter of fact, the work bench 12 does not extend beyond the control line 5 and is within the working range defined by the control line 5. Therefore, in this case, the detection system 1 does not perform the alarm by the alarm 4 and continues monitoring the position of the work bench 12.

  On the other hand, when it is determined that the optical sensor 2 receives the reflected light reflected by the reflecting member 3, the work table 12 is moved, whereby the portion attached with the optical sensor 2 of the work table 12 is restricted. It is going to pass on the reflecting member 3 arranged along the line 5. That is, as shown in FIG. 5, the portion attached with the optical sensor 2 of the work table 12 is disposed at least on the control line 5 and is moving from the inside to the outside of the working range defined by the control line 5 become. Therefore, in this case, the detection system 1 issues an alarm by the alarm 4 on the assumption that the work bench 12 protrudes the restriction line 5.

[Operation / effect]
By the operation as described above, the detection system 1 according to the present embodiment can accurately detect whether the workbench 12 has protruded the restriction wire 5, and that the workbench 12 has protruded the restriction wire 5. When it is detected, the alarm 4 can issue an alarm. Therefore, the worker 8 on the workbench 12 can know that the workbench 12 has exceeded the regulation line 5 by the alarm issued by the alarm 4. Therefore, according to the detection system 1 according to the present embodiment, whether or not the work bench 12 exceeds the restriction line 5 can be confirmed without visual inspection of the worker 8 or the like on the work bench 12 Become.

  In particular, in the present embodiment, a curing enclosure 7 is provided to cover the work bench 12 and the work area. By providing the curing enclosure 7, it is possible to prevent the material used for work from being scattered and falling, but on the other hand, the worker 8 on the work table 12 checks the external condition because it is inside the curing enclosure 7. It is in a difficult situation to do. Even in such a case, the worker 8 can check whether the work bench 12 is sticking out of the restriction wire 5 based on the operation of the alarm 4. Therefore, according to the detection system 1 according to the present embodiment, it is possible to ensure the safety of the work without arranging dedicated personnel for checking the position of the work bench 12.

  In addition, the optical sensor 2 used in the present embodiment may not emit strong light such as the laser pointer 103 used conventionally. Therefore, according to the detection system 1 according to the present embodiment, it can be safely confirmed whether the work bench 12 protrudes beyond the restriction line 5.

  Also, assuming that the reflective member is corrugated due to the unevenness of the road surface and the light from the optical sensor 2 strikes the corrugated part, the reflected light from the reflective member is not properly reflected toward the optical sensor 2 . In such a case, it can not be determined that the optical sensor 2 has received the light reflected by the reflection member, and there is a possibility that the work bench 12 can not detect that the control line 5 has been pulled out. is there.

  On the other hand, in the detection system 1 according to the present embodiment, the reflective tape 32 is disposed on the rubber plate 31. By interposing the rubber plate 31 in this manner, it is possible to suppress the waving of the reflection member 3 (reflection tape 32) due to the unevenness of the road surface. Therefore, it is possible to reduce the reflection failure of the light irradiated from the optical sensor 2 due to the waving of the reflection member 3, thereby causing a defect in the detection operation of whether the work table 12 protrudes the restriction line 5 or not. It can be suppressed.

  Furthermore, according to the present embodiment, by disposing the reflective tape 32 on the rubber plate 31, it is suppressed that the reflective member 3 is blown off by the wind pressure of a passing vehicle passing near the position where the reflective member 3 is disposed. Can.

3 3 Modifications Although the embodiments of the present invention have been described in detail, the above description is merely illustrative of the present invention in all respects. It goes without saying that various improvements and modifications can be made without departing from the scope of the present invention. For example, the following changes are possible. In the following, the same reference numerals are used for the same constituent elements as the above embodiment, and the description of the same parts as the above embodiment is appropriately omitted. The following modifications may be combined as appropriate.

<3.1>
In the above embodiment, one optical sensor 2 is attached to the corner of the rectangular work floor 13. However, the number and arrangement of the optical sensors 2 that can be attached to the work bench 12 may not be limited to such an example, and may be appropriately selected according to the embodiment. For example, a plurality of optical sensors 2 may be attached to the work bench 12. As a result, the optical sensor 2 can be disposed at various places on the work bench 12, so that the dependence of the orientation of the work bench 12 on the detection of whether or not the work bench 12 protrudes the restriction line 5 is reduced. Can.

  Further, in the case where the plurality of optical sensors 2 are attached to the work bench 12, at least two optical sensors 2 may be disposed at both ends of one side of the rectangular shape. FIG. 6 illustrates an example of the arrangement of the optical sensor 2 according to the present modification. In the example of FIG. 6, four optical sensors 2 are attached to four corners on the bottom of the rectangular work floor 13. Thereby, in this modification, a pair of optical sensors 2 are arranged at both ends of each side of the rectangular shape. The arrangement of the optical sensor 2 may not be limited to such an example, and the pair of optical sensors 2 may be arranged only at both ends of one side.

  According to this modification, when one of the two end portions of the pair of optical sensors 2 is disposed on the reflection member 3, it is possible to detect that the work bench 12 has protruded the restriction wire 5. Therefore, on one side where the pair of optical sensors 2 are disposed at both ends, it can be reliably detected whether the work bench 12 protrudes the restriction wire 5 or not. Therefore, even when the control line is positioned on the front, rear, left or right of the workbench, it can be accurately checked whether the workbench exceeds the control line.

<3.2>
In the above-described embodiment, the detection system 1 is used at the scene where the curing enclosure 7 is provided. However, the applicable scene of the detection system 1 may not be limited to such an example, and the detection system 1 may be used in the scene where the curing enclosure 7 is not provided. Even in this case, the worker 8 can save time and labor to visually check whether the work bench 12 protrudes the control line 5 or not.

<3.3>
In the above embodiment, the reflection member 3 is configured of the rubber plate 31 and the reflection tape 32. However, the configuration of the reflection member 3 may not be limited to such an example, and may be appropriately selected according to the embodiment. For example, the reflective member 3 may be configured only with the reflective tape 32.

1 ... detection system,
2 ... Optical sensor,
3 ... reflective member, 31 ... rubber plate (flexible band), 32 ... reflective tape,
4 ... Alarm,
5 ... regulatory line, 6 ... tunnel, 7 ... curing enclosure, 8 ... workers
10: aerial work vehicle, 11: boom, 12: work platform, 13: work floor

Claims (7)

In a high-level work vehicle for work at heights, whether or not a work table provided so as to be movable in the vertical direction and in the horizontal direction protrudes beyond the restriction line of the road surface located below the floor of the work table A detection system for detecting
An optical sensor mounted on the work bench such that light is emitted toward the road surface below the floor of the work bench and light reflected from the road surface can be received;
A reflecting member configured to reflect light emitted from the optical sensor with a reflectance different from that of the road surface, wherein the reflecting member is disposed along a restriction line of the road surface;
An alarm attached to the work table, the alarm being configured to emit an alarm when triggered by the optical sensor receiving the light reflected by the reflection member;
Equipped with
Detection system. The light emitted by the optical sensor is infrared light.
The detection system according to claim 1. A plurality of the optical sensors are attached to the workbench,
A detection system according to claim 1 or 2. The floor of the workbench is rectangular in shape;
Two optical sensors of the plurality of optical sensors are disposed at both ends of one side of the rectangular shape,
The detection system according to claim 3. A curing enclosure is provided to cover the work table and the work area on which the workers on the work table work.
The detection system according to any one of claims 1 to 4. The reflective member comprises a flexible band disposed on the road surface, and a reflective tape affixed onto the flexible band.
The detection system according to any one of claims 1 to 5. In a high-level work vehicle for work at heights, whether or not a work table provided so as to be movable in the vertical direction and in the horizontal direction protrudes beyond the restriction line of the road surface located below the floor of the work table Detection method for detecting
Irradiating light toward the road surface below the floor of the workbench by an optical sensor attached to the workbench;
Receiving the reflected light reflected on the road surface by the optical sensor;
A reflecting member configured to reflect light emitted from the optical sensor with a reflectance different from that of the road surface, wherein the reflected light is reflected by the reflecting member disposed along the restriction line of the road surface. Determining whether the optical sensor has received the light;
Issuing an alarm by an alarm attached to the work bench when the optical sensor receives the light reflected by the reflection member;
Equipped with
Detection method.