Safety support system
The safety support system addresses unnecessary warnings by using signal transmitting and receiving means to automatically activate alarms when entering obstacle areas, ensuring safe operation and reducing human error for construction machinery.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- KAJIMA ROAD
- Filing Date
- 2022-08-01
- Publication Date
- 2026-06-23
AI Technical Summary
Conventional safety support systems frequently issue unnecessary warnings, increasing the risk of human error and accidents by not distinguishing between areas requiring height restrictions and those that do not, especially for construction machinery like hydraulic excavators, which can freely rotate and pose a high risk of contacting overhead structures.
A safety support system that uses signal transmitting and receiving means to automatically activate an alarm when a mobile body enters an area with obstacles, such as overhead lines, and deactivate it when leaving, ensuring operators are notified of potential hazards and can work safely without constant manual checks.
The system enhances safety by reducing unnecessary warnings, minimizing human error, and allowing operators to work efficiently by automatically detecting entry and exit from obstacle areas, thereby preventing accidents and improving work efficiency.
Smart Images
Figure 0007878961000001 
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Abstract
Description
Technical Field
[0001] The present invention relates to a safety support system. In particular, when a moving body enters a specific area such as a construction site where there are obstacles such as overhead lines, it alerts an operator on the moving body side so as not to contact the obstacles, and relates to a safety support system for ensuring the safety of the moving body and the like.
Background Art
[0002] In civil engineering and construction sites (hereinafter collectively referred to as "construction sites, etc."), contact accidents within the working range of construction machinery have been incessant, and reliable measures for on-site safety management are required. In particular, for overhead installations such as electric wires, pipes, signals, overbridges, and culvert ceilings, it is difficult for crane operators to perceive the presence in the height direction. The attention in the height direction depends on the skill and attentiveness of the operator, and there are differences and limitations, and currently, contact accidents often occur.
[0003] As current countermeasures, there are those that mechanically limit the telescopic movement height of the crane working device, and systems that use light, radio waves, or angle sensors to issue an alarm to alert the operator when the working device reaches a preset height. However, currently, not all cranes are equipped with them.
[0004] In addition, not all areas within construction sites, etc. require height restrictions in the air. Although free work can be done in most areas, the alarm devices and the like often operate frequently, which is also troublesome for the operator. Therefore, there are also many cases where work is continued with the alarm device deliberately stopped, and accidents such as contacting overhead installations or surrounding obstacles occur without noticing when entering a work area where special attention must be paid, especially in areas where height restrictions are required.
Summary of the Invention
Problems to be Solved by the Invention
[0005] As mentioned above, conventional safety support systems have the problem of frequently issuing unnecessary warnings, even when working in areas where height restrictions are not required or where there are no obstacles. Furthermore, this greatly increases the risk of human error, such as operators intentionally stopping the warning system or forgetting to restart it in areas where it is needed. In particular, hydraulic excavators used on construction sites are the most frequently used construction machines, and because the self-propelled vehicle body (lower running body) and the articulated driven members (upper slewing body, boom, and arm, etc.) that are rotatably attached to the vehicle body can rotate freely, there is a very high possibility that the joints of the driven members will come into contact with overhead structures or surrounding obstacles such as power lines, pipes, signals, bridges, and culvert ceilings.
[0006] Therefore, a technical challenge arises in order to ensure safety by issuing an alarm when a moving object enters an area where obstacles such as overhead lines exist and surveillance is required. The present invention aims to solve this problem. [Means for solving the problem]
[0007] The present invention was proposed to achieve the above objective, and the invention described in claim 1 is a safety support system that provides a warning to a mobile body that has entered a watch area where obstacles such as overhead lines are present, thereby supporting the safety of the mobile body, comprising: a signal transmitting means that emits a signal wave to construct the watch area; a signal receiving means that is attached to the mobile body and moves with the mobile body, and receives the signal wave when it enters the watch area constructed by the signal transmitting means; a warning means that issues the warning; and a standby state in which the warning means is turned on and the warning can be issued when the signal receiving means enters the watch area together with the mobile body. year If the person leaves the aforementioned observation area, the alarm means will activate. From ON Off It switches and issues automatically. The aforementioned alarm Stop it. We provide a control device and a safety support system.
[0008] This configuration involves installing signal transmitting means in specific locations where there is a high possibility of contact with obstacles such as overhead structures and surrounding objects, including power lines, pipes, signals, bridges, and culvert ceilings, and where a lookout is required to perform work, thereby creating a lookout area. A signal receiving means is also installed on the mobile unit performing work within the lookout area to receive signal waves from the signal transmitting means. When the mobile unit enters the lookout area, the control device automatically switches the alarm means from off to on, and a pilot lamp on the alarm means illuminates. This notifies the operator that the mobile unit has entered the lookout area, supporting them in performing work safely while paying attention to obstacles such as overhead lines. When the mobile unit leaves the lookout area, the control device automatically switches the alarm means from on to off and the pilot lamp turns off. This allows the operator to know that the mobile unit has left the lookout area. This enables the operator to recognize that they are working outside the lookout area and to perform their work freely.
[0009] The invention described in claim 2 is a general-purpose construction machine in the configuration described in claim 1, wherein the mobile body comprises a self-propelled lower traveling body, an upper rotating body that rotates horizontally relative to the lower traveling body, a multi-joint driven member that can swing vertically relative to the upper rotating body, and an actuator for driving the driven member, wherein the signal receiving means is installed at least at the rear of the upper rotating body and on both the left and right sides of the driven member, and the alarm means issues an alarm when the driven member reaches a predetermined height, thereby providing a safety support system.
[0010] In this configuration, when the rear of the upper rotating body of the mobile unit rotates horizontally, or when the driven member swings upward beyond a predetermined height, and the rear of the upper rotating body or the driven member enters the lookout area, the control device automatically switches the alarm means from off to on, and a pilot lamp, for example, provided on the alarm means illuminates. This notifies the operator that they are working in a lookout area where careful work is required, and helps them to work safely while paying attention to their surroundings.
[0011] The invention described in claim 3 provides a safety support system in which, in the configuration described in claim 2, the signal receiving means is provided on both the left and right sides of the driven member.
[0012] With this configuration, the signal receiving means provided on both the left and right sides of the driven member can more reliably receive the signal wave from the signal transmitting means, thereby improving detection accuracy.
[0013] The invention described in claim 4 provides a safety support system in which, in the configuration described in claim 2 or 3, the signal receiving means is further provided at the rear end of the upper rotating body.
[0014] With this configuration, the signal receiving means located at the rear of the upper rotating body can more reliably receive the signal wave from the signal transmitting means, even when the moving body moves backward into the observation area, or when the leading end of the moving body exits the observation area first while the rear end remains, thereby improving detection accuracy.
[0015] The invention described in claim 5 provides a safety support system in which, in the configuration described in claim 1, the signal transmitting means or the signal receiving means can be detachably attached to the moving body via a magnet.
[0016] With this configuration, for mobile devices that do not have pre-installed signal transmitting or receiving means, the signal receiving means can be detachably attached via a magnet and used.
[0017] The invention described in claim 6 provides a safety support system in which, in the configuration described in claim 1, the signal transmitting means is portable and configured to reconstruct the lookout area at the location after movement.
[0018] With this configuration, the signal transmitting means can be freely moved according to the construction site, etc., and the observation area can be reconstructed and used in an appropriate position after the move. [Effects of the Invention]
[0019] According to the present invention, when a mobile object enters a watch area, the control device automatically switches the alarm means from off to on, for example, by lighting up a pilot lamp. This notifies the operator that the mobile object has entered a watch area requiring special attention and that the upcoming work will require particular attention to the surroundings, thereby supporting safety. Conversely, when the mobile object leaves the watch area, the control device automatically switches the alarm device from on to off-on, notifying the operator that the work area is free of obstacles. As a result, after leaving the area, the operator can proceed with work quickly without having to worry too much about the surroundings, which is expected to improve work efficiency. Furthermore, since entry and exit from the observation area are automatically detected, operators are no longer required to perform cumbersome checks. In addition, to eliminate inconvenience, operators may intentionally disable the alarm system while working, and continue working without noticing they have entered the observation area, thus preventing accidents such as contact with obstacles like overhead lines. [Brief explanation of the drawing]
[0020] [Figure 1] This is a schematic block diagram of a safety support system shown as one embodiment of the present invention. [Figure 2] The hydraulic excavator shown is an example of a mobile body to which the above safety support system is applied, with (A) being its plan view and (B) being its side view. [Figure 3]This shows an example of a surveillance area constructed by the above safety support system. (A) is a plan view thereof, and (B) is a side view thereof. [Figure 4] This is a diagram for explaining the support operation when the hydraulic excavator advances in one direction in the above safety support system. (A) is a plan view immediately after the bucket enters first, (a) is a side view of (A), (B) is a plan view when the highest part of the arm joint enters, (b) is a side view of (B), (C) is a plan view when the highest part of the arm joint passes below the overhead line height setting, and (c) is a side view of (C). [Figure 5] This is a diagram for explaining the support operation when the hydraulic excavator advances in one direction in the above safety support system. (A) is a plan view immediately after the driven member exits first, (a) is a side view of (A), (B) is a plan view immediately after the lower traveling body of the hydraulic excavator exits, (b) is a side view of (B), (C) is a plan view of the state where the upper slewing body makes a horizontal turn and the driven member enters the surveillance area again immediately after the lower traveling body of the hydraulic excavator exits, and (c) is a side view of (C).
Mode for Carrying Out the Invention
[0021] In order to achieve the object of ensuring the safety of a moving body by issuing an alarm when the moving body enters an area where obstacles such as overhead lines exist and surveillance is required, the present invention provides a safety support system that issues an alarm to notify the moving body of approaching the obstacle and supports the safety of the moving body when the moving body enters a surveillance area where obstacles such as overhead lines exist. The safety support system is realized by providing a signal transmission means for transmitting a signal wave to construct the surveillance area, a signal reception means attached to the moving body and moving together with the moving body, which receives the signal wave when entering the surveillance area constructed by the signal transmission means, an alarm means for issuing the alarm, and a control device that automatically switches the alarm means on when the signal reception means enters the surveillance area together with the moving body and off when exiting the surveillance area.
Example
[0022] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following embodiments, when referring to the number, numerical values, quantities, ranges, etc., of the components, unless specifically indicated or clearly limited in principle to a particular number, the number is not limited to that particular number, and may be greater than or less than that number.
[0023] Furthermore, when referring to the shape, positional relationship, etc. of constituent elements, unless otherwise explicitly stated or it is clearly considered not to be so in principle, this includes things that are substantially similar or alike to those shapes, etc.
[0024] Furthermore, drawings may exaggerate features by enlarging characteristic parts to make them easier to understand, and the dimensional ratios of components may not be the same as in reality. Also, in cross-sectional views, hatching of some components may be omitted to make the cross-sectional structure of the components easier to understand.
[0025] Furthermore, in the following description, expressions indicating directions such as up and down or left and right are not absolute. They are appropriate when describing the orientation of each part of the safety support system of the present invention, but should be interpreted differently if the orientation changes. Also, the same reference numerals are used for the same elements throughout the description of the embodiments.
[0026] Figures 1 to 3 show one embodiment of the safety support system 10 according to the present invention. In this embodiment, a hydraulic excavator 100 is described as an example of a working machine that is a mobile unit used at construction sites, etc., but it is of course applicable to general-purpose construction machinery other than the hydraulic excavator 100, such as cranes and wheel loaders. Here, the case in which the hydraulic excavator 100 shown in Figure 2 is used as the mobile unit will be described as an example.
[0027] First, the main components of the safety support system 10 will be explained using Figures 1 to 3. Figure 1 shows a block diagram illustrating the schematic configuration of the safety support system 10, Figure 2 shows the configuration of the hydraulic excavator 100 which is a mobile unit, and Figure 3 shows an example of the observation area 11.
[0028] The hydraulic excavator 100 is assumed to be a typical hydraulic excavator. As shown in detail in Figure 2, the hydraulic excavator 100 comprises a self-propelled lower traveling body 101 that constitutes the vehicle body, an upper rotating body 102 that rotates horizontally relative to the lower traveling body 101, a multi-jointed driven member 103 which is made up of a boom 103A, an arm 103B, and a bucket 103C mounted on the upper rotating body 102 and each rotating in the vertical direction, and an actuator 104 that drives the driven member 103 in the vertical direction. The operator riding in the hydraulic excavator 100 operates the hydraulic excavator 100 using an operating device (not shown) provided in the control room 102A located in the upper rotating body 102.
[0029] The safety support system 10 includes a lookout area construction unit 12 for constructing a lookout area 11 for the hydraulic excavator 100, a mobile body mounting unit 13, a control device 14, an alarm means 15, a radio receiver 16, and the like. In this embodiment, the mobile body mounting unit 13 is provided in the control room 102A and driven member 103 of the upper slewing body 102.
[0030] Furthermore, the control device 14 is composed of a microcomputer (commonly known as a "microcontroller") and controls the entire safety support system 10 according to a predetermined procedure using a program embedded in the microcomputer. It comprises a control device 14A located on the side of the observation area construction section 12 and a control device 14B located on the side of the hydraulic excavator 100.
[0031] The surveillance area construction unit 12 comprises a control device 14A, an infrared illuminator 17, and a setting unit 18A. The surveillance area construction unit 12 is modular and portable, and can be moved and installed in any location according to the construction site, etc.
[0032] The infrared irradiator 17 is a signal transmitting means, and as shown in Figure 3, it emits infrared rays as signal waves to set the range of the lookout area 11. The range of the lookout area 11 can be freely set by using the setting unit 18A and changing the vertical and horizontal ranges of the infrared rays emitted by the infrared irradiator 17 via the control device 14A. The infrared irradiator 17 is portable and can be moved to reconstruct the range of the lookout area 11 at the new location. The lookout area 11 here is the area including overhead wires 50 that are stretched in the air by concrete poles, steel towers, etc. at the construction site. The vertical range includes the range in which the highest point 105 of the arm joint, which is the base of the arm 103B that is articulated with the upper end of the boom 103A of the hydraulic excavator 100, can come into contact with the overhead wires 50, and the horizontal range includes the range in which the upper part of the hydraulic excavator 100 can come into contact with the driven member 103 when the arm rotates. However, it is natural that these ranges will change depending on the surrounding circumstances.
[0033] The control device 14A controls the entire lookout area construction unit 12, while the setting unit 18A is used to adjust the range of the lookout area 11 set by the infrared illuminator 17, etc.
[0034] The mobile body mounting unit 13 installed on the hydraulic excavator 100 includes a controller 22 having a control device 14B, a setting unit 18, and an alarm means 15, a radio wave receiver 16, an infrared receiver 19, and an angle sensor 20.
[0035] The control device 14B controls the entire mobile body mounting unit 13, and the setting unit 18B is used to adjust various settings in the mobile body mounting unit 13.
[0036] The alarm means 15 supports safety by issuing warnings to workers, etc., using a buzzer, whistle, and / or light. In this embodiment, the alarm means 15 includes an alarm device 15A that sounds an alarm 30 to warn, and a pilot lamp 15B that can be turned on and off, etc., which are installed in the control room 102A. The pilot lamp 15B is, for example, a red LED bulb.
[0037] The radio receiver 16 is built into the control device 14B. The alarm device 15A and the pilot lamp 15B of the alarm means 15 are connected to the control device 14B.
[0038] The infrared receiver 19, when it enters the observation area 11 set by the infrared irradiator 17 together with the hydraulic excavator 100, receives infrared light emitted by the infrared irradiator 17 and inputs the received signal to the control device 14B. The infrared receiver 19 has a built-in wireless transmitter 21, and when the infrared receiver 19 receives infrared light from the infrared irradiator 17, it sends the signal to the control device 14B via the wireless transmitter 21 and radio wave receiver 16. When the infrared receiver 19 receives infrared light, the control device 14B switches the power of the angle sensor 20 from off to on, and also switches the power of the alarm device 15A and pilot lamp 15B in the alarm means 15 from off to on, illuminating the pilot lamp 15B. When infrared light is no longer received, the power of the alarm device 15A and pilot lamp 15B is switched from on to off, and the pilot lamp 15B is turned off.
[0039] In this embodiment, as shown in Figure 2, the infrared receiver 19 consists of infrared receivers 19R and 19L attached to the left and right sides of the base of the arm 103B, which is articulated to the upper part of the boom 103A of the hydraulic excavator 100, and also an infrared receiver 19B attached to the rear end of the upper slewing body 102 of the hydraulic excavator 100, as shown in Figure 2. These infrared receivers 19R, 19L, and 19B can be detachably attached to the required positions on the hydraulic excavator 100, for example, by magnets. Furthermore, each unitized mobile mounting section 13 can be moved to another hydraulic excavator 100 or other general-purpose construction machine and reattached to the required position for use. In addition, the infrared receiver 19 can be used in any number, in addition to infrared receivers 19R, 19L, and 19B, as needed.
[0040] The angle sensor 20 is a sensor that detects the vertical angle (elevation angle) of the boom 103A of the hydraulic excavator 100. The information on the elevation angle of the boom 103A detected by the angle sensor 20 is sent to the control device 14B. The control device 14B then determines that the height h of the highest point 105 of the arm joint of the arm 103B, as shown in Figure 3(B), is the alarm threshold by subtracting a safe clearance from the height H of the overhead wire 50. Therefore, when the control device 14B determines from the angle of the boom 103A detected by the angle sensor 20 that the height h of the highest point 105 of the arm joint is within the alarm threshold, it instructs the alarm device 15A to sound the alarm 30. As a result, the alarm device 15A sounds the alarm 30. Furthermore, when the height h of the highest point 105 of the arm joint is within the alarm threshold, the alarm device 15A stops emitting the alarm 30.
[0041] Next, the operation of the safety support system 10 configured in this way will be explained with reference to the operation diagrams in Figures 4 and 5. Figure 4 is a diagram showing an example of a general support operation in the safety support system 10 when the hydraulic excavator 100 moves in one direction across the lookout area 11 (in this embodiment, moving from right to left). Figure 5 is a diagram showing an example of a support operation in the safety support system 10 when the lower traveling body of the hydraulic excavator 100 exits the lookout area 11, and immediately afterwards the upper rotating body 102 rotates horizontally, and the driven member 103 re-enters the lookout area 11.
[0042] First, when implementing the safety support system 10, the system takes into account obstacles in the surrounding area where work is performed at a construction site, etc., and sets up a watch area 11 by placing the infrared irradiator 17 of the watch area construction unit 12 at the construction site, etc. In Figures 3, 4, and 5 of this embodiment, the overhead wires 50 present at the construction site, etc. are identified as obstacles, and the range in which the infrared irradiator 17 illuminates, i.e., the watch area 11, is set according to the height of the overhead wires 50. Note that Figures 3, 4, and 5 show the state in which the watch area 11 has already been set. In this watch area 11, it is assumed that when the hydraulic excavator 100 moves the driven member 103 upward beyond a height h, the driven member 103 will hit the overhead wire 50, which is at a height H from the ground, and there is a risk of accident, which falls within the alarm generation threshold. Furthermore, the monitoring area 11 can be configured, for example, by switching the setting unit 18A, to allow for a two-stage switching mechanism, so that the long range is approximately 15 meters and the short range is approximately 10 meters.
[0043] Therefore, in this safety support system 10, as shown in Figures 4(A) and (a), when the infrared receiver 19 of the hydraulic excavator 100 is not inside the watch area 11, the pilot lamp 15B, which constitutes part of the alarm means, remains off, and the warning sound from the alarm device 15A, which also constitutes part of the alarm means, is also stopped.
[0044] However, as shown in Figures 4(B) and 4(b), when the hydraulic excavator 100 moves toward the lookout area 11 and the infrared receivers 19L and 19R attached to the driven member 103 enter the lookout area 11, both or one of the infrared receivers 19L and 19R attached to the hydraulic excavator 100 receive infrared radiation from the infrared irradiator 17, which is then input to the control device 14B. The control device 14B then switches the power of the angle sensor 20 from off to on, and also switches the power of the alarm device 15A and pilot lamp 15B in the alarm means 15 from off to on, illuminating the pilot lamp 15B to inform the operator of the hydraulic excavator 100 that the hydraulic excavator 100 has entered the lookout area 11. The control device 14B then encourages the operator of the hydraulic excavator 100 to work carefully because they are working within the lookout area 11, thereby supporting work safety.
[0045] Furthermore, in the control device 14B, when working within the observation area 11, if the height h of the highest point 105 of the arm joint exceeds the alarm threshold based on the signal from the angle sensor 20 which detects the angle of the boom 103A, the control device 14B sounds an alarm 30 via the alarm device 15A. Upon hearing this alarm 30, the operator of the hydraulic excavator 100 proceeds with the work while ensuring that the driven member 103 does not touch the overhead wire 50, as shown in Figures 4(C) and (c). The alarm 30 from the alarm device 15A is sounded only during the period in which the alarm threshold is exceeded, or for a predetermined time, to provide support.
[0046] Furthermore, the support state continues until the infrared receiver 19 of the hydraulic excavator 100 completely leaves the observation area 11, as shown in Figures 5(A), (a), 5(B), and (b). Then, when all infrared receivers 19 (19L, 19R, 19B) of the hydraulic excavator 100 leave the watch area 11, the control device 14B switches the power of the angle sensor 20 from on to off, and switches the alarm device 15A and pilot lamp 15B of the alarm means 15 from on to off, and turns off the pilot lamp 15B. If the hydraulic excavator 100 leaves the watch area 11 while the alarm device 15A is emitting the alarm sound 30, the alarm sound 30 is set to continue sounding for about 5 seconds after the hydraulic excavator 100 has left the watch area 11. In addition, the turning off of the pilot lamp 15B allows the operator to recognize that the hydraulic excavator 100 has left the watch area 11.
[0047] Furthermore, when the hydraulic excavator 100 leaves the watch area 11, and then, for example as shown in Figures 5(C) and (c), rotates the upper rotating body 102 horizontally by approximately 180 degrees so that the infrared receivers 19L and 19R of the hydraulic excavator 100 are back inside the watch area 11, the control device 14B switches the power of the angle sensor 20 from off to on again, and also switches the power of the alarm device 15A and pilot lamp 15B in the alarm means 15 from off to on, illuminating the pilot lamp 15B. This makes the operator aware that the hydraulic excavator 100 has re-entered the watch area 11. In addition, when the height h of the highest point 105 of the arm joint exceeds the alarm threshold, the control device 14B sounds an alarm 30 via the alarm device 15A.
[0048] Furthermore, when all infrared receivers 19 (19L, 19R, 19B) of the hydraulic excavator 100 leave the watch area 11 again, the control device 14B switches the power of the angle sensor 20 from on to off, and also switches the power of the alarm device 15A and pilot lamp 15B in the alarm means from on to off, turning off the pilot lamp 15B. This allows the operator to recognize that the hydraulic excavator 100 has left the watch area 11.
[0049] Therefore, according to the safety support system 10 of this embodiment, an infrared irradiator 17 as a signal transmitting means is installed in specific locations where there is a high possibility of contact with obstacles such as overhead lines 50 and surrounding objects such as power lines, pipes, signals, overpasses, and culvert ceilings, and where it is necessary to have a lookout to perform work, thereby constructing a lookout area 11. An infrared receiver 19 as a signal receiving means is attached to a hydraulic excavator 100, which is a mobile unit that performs work in and around the lookout area 11, so that it can receive signal waves from the signal transmitting means in and near the lookout area 11. When the hydraulic excavator 100 enters the lookout area 11, the control device 14 operates to automatically switch the pilot lamp 15B and the alarm device 15A, which are alarm means 15, from off to on, so that the pilot lamp 15B lights up and the alarm device 15A sounds an alarm 30, etc. As a result, when the hydraulic excavator 100 enters the observation area 11, the system notifies the operator that the hydraulic excavator 100 has entered the observation area 11, and supports them in performing their work safely while paying attention to their surroundings. Furthermore, when the hydraulic excavator 100 leaves the observation area 11, the control device 14 automatically switches the pilot lamp 15B and the alarm 15A from on to off, turning off the pilot lamp 15B and stopping the alarm sound 30 of the alarm 15A, so that the operator knows that the hydraulic excavator 100 has left the observation area 11. As a result, the operator can recognize that they are working outside the observation area 11 and proceed with their work freely and quickly.
[0050] In the above embodiment, the observation area 11 was described as being constructed using an infrared irradiator 17 and an infrared receiver 19. However, it is not limited to the infrared irradiator 17 and infrared receiver 19; it is also possible to use general radio signals, and the signal transmitting means and signal receiving means in this invention encompass these as well. However, when using infrared rays, there is the advantage that infrared rays are not affected by rain, wind, or heavy machinery such as hydraulic excavators 100, and their operation is stable.
[0051] Furthermore, the infrared irradiator 17 may be installed, for example, by attaching it to the tip of a road cone commonly used at construction sites, or it may be attached to a tripod, pipe support, barricade, etc.
[0052] Furthermore, the present invention can be modified in various ways as long as it does not depart from the spirit of the invention, and it goes without saying that the present invention extends to such modified forms. [Explanation of symbols]
[0053] 10: Safety support system 11: Watch Area 12: Watchtower Area Construction Department 13: Mobile unit mounting section 14, 14A, 14B: Control devices 15: Alarm means 15A:Alarm 15B: Pilot lamp 16: Radio receiver 17: Infrared irradiator (signal transmission means) 19, 19B, 19L, 19R: Infrared receiver (signal receiving means) 22: Controller 30: Alarm sound 50: Overhead line 100: Hydraulic excavator (mobile type) 101: Lower running body 102: Upper rotating body 103: Driven member 103A: Boom 103B: Arm 103C: Bucket 104: Actuator 105: Highest point of the arm joint H: Height of overhead lines h: Height of the highest point of the arm joint
Claims
1. A safety support system that provides a warning to a mobile body that has entered a monitoring area where obstacles such as overhead lines are present, thereby assisting the safety of the mobile body by issuing a warning to alert it of its approach to the obstacles, A signal transmitting means that emits a signal wave to construct the aforementioned surveillance area, A signal receiving means that is attached to the mobile body and moves together with the mobile body, and receives the signal wave when it enters the lookout area constructed by the signal transmitting means, The alarm means that issues the aforementioned alarm, A safety support system characterized by comprising a control device that, when the signal receiving means enters the watch area together with the moving body, turns on the alarm means to enable the alarm to be issued, and when it leaves the watch area, automatically switches the alarm means from on to off to stop the issued alarm.
2. The aforementioned mobile body is a general-purpose construction machine comprising a self-propelled lower traveling body, an upper rotating body that rotates horizontally relative to the lower traveling body, a multi-jointed driven member that can swing vertically relative to the upper rotating body, and an actuator for driving the driven member. At least the signal receiving means is installed on the driven member, The alarm means issues an alarm when the driven member reaches a predetermined height. The safety support system according to feature 1.
3. The safety support system according to claim 2, characterized in that the signal receiving means is provided on both the left and right sides of the driven member.
4. The safety support system according to claim 2 or 3, characterized in that the signal receiving means is further provided at the rear end of the upper rotating body.
5. The safety support system according to claim 1, characterized in that the signal receiving means can be detachably attached to the moving body via a magnet.
6. The safety support system according to claim 1, characterized in that the signal transmitting means is portable and configured to reconstruct the lookout area at the location after movement.