Safety barrier

Abstract

A safety barrier (10) is provided with: a barrier main body (11) disposed so as to stand up with respect to a floor surface (5a); a light-emitting device (12) which is attached to the gate body (11) and emits light; a sound output device (13) which is attached to the grill body (11) and outputs sound; a detection device (14) which is attached to the gate main body (11) and is capable of detecting a person; and a control device that, on the basis of a signal from the detection device (14), turns on the light-emitting device (12) when it is determined that a person is in a notification state in which the person is likely to enter an entry prevention region in which intrusion of the person is prevented by the gate main body (11), and that, when it is determined that the notification state continues for a predetermined time, causes the sound output device (13) to output a warning sound for warning.

Description

Technical Field

[0001] The present disclosure relates to a safety barrier for preventing people from intruding into an intrusion prevention area, and relates to a safety barrier preferably used in the maintenance and inspection of elevators and escalators. Background Art

[0002] During maintenance and inspection of elevators and escalators, a safety barrier is generally installed to prevent people from intruding into the vicinity of the landing door in the landing and the entrance and exit of the truss. In the past, as such a safety barrier, there is a safety barrier described in Patent Document 1. The safety barrier includes: a grid plate on which a paper or the like with a warning message such as "under maintenance" is pasted; a support column fixed to the grid plate; and a support plate having a fitting hole into which the lower end of the support column is pressed. The support plate supports the support column, whereby the safety barrier stands on the ground.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2008-174353 Summary of the invention

[0006] Problems to be solved by the invention

[0007] The safety barrier is configured such that a paper with words and phrases printed thereon is pasted on the barrier plate, so that the visually impaired cannot recognize the safety barrier. In addition, it is difficult for children and the elderly who are absorbed in the game to notice the safety barrier. Therefore, the purpose of the present disclosure is to provide a safety barrier that is easy to notice and can effectively prevent people from entering a dangerous area, and is easy to recognize even for the visually impaired, children, and the elderly.

[0008] Means for solving problems

[0009] In order to solve the above-mentioned problems, the safety gate of the present invention comprises: a gate body, which is configured to stand upright relative to a loading surface; a light-emitting device, which is installed on the gate body and emits light; a sound output device, which is installed on the gate body and outputs sound; a detection device, which is installed on the gate body and can detect people; and a control device, which, based on a signal from the detection device, lights up the light-emitting device when it is determined that a person may enter an entry prevention area where the gate body is used to prevent people from intruding, and when it is determined that the warning state continues for a specified time, causes the sound output device to output a warning sound for warning attention.

[0010] In addition, the above-mentioned notification state can be based on information of a signal from a detection device. In detail, the control device may also determine that the above-mentioned notification state is in effect when the detection device detects a person. Alternatively, the control device may also determine that the above-mentioned notification state is in effect when the intensity of a person detection signal detected by the detection device becomes above a prescribed intensity. Alternatively, the control device may also determine that the above-mentioned notification state is in effect when the distance between the detection device and the person becomes below a prescribed distance. Alternatively, the control device may also determine that the above-mentioned notification state is in effect when it is determined that a person has invaded a prescribed area based on a signal from the detection device.

[0011] According to the present disclosure, the control device turns on a light emitting device, such as a lamp, when it is determined that a person may enter the entry prevention area where the gate body prevents intrusion based on a signal from the detection device. Therefore, it is easy for a person to recognize that he or she is approaching the entry prevention area, and it is possible to effectively prevent a person from entering the entry prevention area.

[0012] Furthermore, when the control device determines that the notification state has continued for a predetermined time, the sound output device outputs a warning sound for warning attention. Thus, even people who easily miss the safety gate, such as visually impaired people, children who are absorbed in games, and the elderly, can easily recognize that they are approaching the entry-blocking area. Therefore, it is possible to more effectively prevent people from entering the entry-blocking area, and a highly secure safety gate can be realized.

[0013] Furthermore, when the alarm state is reached, the light emitting device is illuminated, and then, only when the situation that a person may enter the entry prevention area does not improve even after a predetermined time has passed, a warning sound is output. Therefore, it is possible to suppress the frequent output of the warning sound, and it is possible to suppress the discomfort of people around the safety barrier due to the frequent output of the warning sound.

[0014] In addition, the safety gate may have a plurality of light-emitting portions, which are installed on the gate body at intervals in the direction of the gate body along the setting surface, and the detection device can detect relative position information related to the relative existence position of a person relative to the gate body. When the control device becomes the notification state, the proximity light-emitting portion closest to the person among the plurality of light-emitting portions is lit according to the relative position information.

[0015] In addition, the control device may also light up one or more light emitting units other than the approaching light emitting unit according to the relative position information when the notification state is reached. In addition, as an example of a detection device capable of detecting relative position information related to the relative position of a person relative to the grid body, a detection device having a plurality of detection units installed on the grid body at intervals in a direction along the installation surface, each detection unit including an ultrasonic transmitting unit and an ultrasonic receiving unit, etc. may be considered.

[0016] According to this configuration, when the control device is in the notification state, the proximity light emitting unit closest to the person among the plurality of light emitting units is lit according to the relative position information. Therefore, the person can easily notice the lighting of the light emitting device and can easily and quickly eliminate the notification state.

[0017] In addition, it may be that the detection device is capable of detecting relative position information related to the relative existence position of a person relative to the gate body, the sound output device is capable of changing the maximum output direction of the warning sound at the maximum output, and the control device changes the maximum output direction according to the relative position information when the notification state continues for the specified time, so as to increase the volume of the warning sound at the relative existence position.

[0018] In addition, as examples of a sound output device capable of changing the above-mentioned maximum output direction, consider a sound output device having a plurality of speakers (preferably directional speakers) installed on a grille body at intervals in a direction along a setting surface, a sound output device having an actuator (such as a motor, etc.) capable of changing the orientation (direction) of the speakers, and the like.

[0019] According to this structure, when the notification state continues for a predetermined time, the control device changes the maximum output direction according to the relative position information to increase the volume of the warning sound at the relative existence position. Therefore, people are more likely to notice the warning sound, which can more effectively prevent people from entering the entry prevention area.

[0020] In addition, the safety gate has a speed detection unit, which can detect an approach-related speed related to the approach speed of a person approaching the gate body. When the control device determines that the approach-related speed is above a first specified speed, the control device performs at least one of shortening the specified time and increasing the volume of the warning sound as compared to a case where the approach-related speed is included in a specified speed area smaller than the first specified speed.

[0021] As an example of a speed detection unit capable of detecting the approach-related speed, a speed detection unit including an ultrasonic sensor capable of detecting the distance to a person as an example of a detection device and a timer capable of measuring an elapsed time is conceivable.

[0022] In this structure, when a person approaches the safety barrier at a speed higher than the specified speed, if a warning sound is output within a short time after the alarm state is set, the person can be effectively prevented from entering the entry prevention area before the warning sound is output. In addition, when a person approaches the safety barrier at a speed higher than the first specified speed, if the volume of the warning sound is increased, the person can also be effectively prevented from entering the entry prevention area.

[0023] In addition, the safety gate may also have a speed detection unit, which can detect an approach-related speed related to the approach speed of a person approaching the gate body, and when the control device determines that the approach-related speed is below a second prescribed speed, the control device increases the volume of the warning attention sound compared to a case where the approach-related speed is included in a prescribed speed area greater than the second prescribed speed.

[0024] Not only is it difficult for seniors to notice the safety barriers, but sometimes they also have trouble hearing them.

[0025] According to this configuration, when it is determined that the approach-related speed is below the second predetermined speed, the volume of the warning sound is increased. Therefore, the elderly who walk slowly are more likely to notice the warning sound, and thus, the elderly can be effectively prevented from entering the entry prevention area.

[0026] Furthermore, the detection device may be capable of detecting distance information related to the distance to a person, and as the distance becomes shorter, the control device may increase the volume of the warning sound in stages or continuously.

[0027] According to this configuration, as a person approaches the entry prevention area, the volume of the warning sound increases stepwise or continuously, and thus it is possible to effectively prevent a person from entering the entry prevention area.

[0028] Furthermore, the warning sound may be a voice of words or phrases having an effect of preventing a person from entering the entry prevention area.

[0029] Examples of phrases that have the effect of preventing people from entering the prohibited entry area include, for example, "It is dangerous to approach the safety barrier.", "Please move away from the safety barrier.", "There is a prohibited entry area ahead.", etc.

[0030] According to this configuration, a person can recognize that there is an entry-restricted area ahead by the content of the voice, thereby effectively preventing a person from entering the entry-restricted area.

[0031] Furthermore, the safety barrier may include: a cable for supplying power from a power source to the light emitting device, the sound output device, and the detection device; and a cable storage portion for storing the cable, wherein the length of the cable is greater than 2 m.

[0032] The height distance from the lowest floor to the pit of the hoistway in an elevator is mostly more than 2m. In addition, pit operations account for a large proportion of maintenance and inspection operations, and pit operations are mostly performed by setting the safety gate on the ground of the lowest floor. In addition, there is currently no safety gate with an extremely long cable of more than 2m for supplying power. In this context, when the power cable of the safety gate is made extremely long, more than 2m, the power of the electrical components of the safety gate can be supplied to the electrical components via the sockets set in the pit, and a significant effect can be obtained in terms of power supply. On the other hand, when an extremely long power cable of more than 2m is used, the ease of transportation and operability of the safety gate may deteriorate.

[0033] However, according to this structure, since there is a cable storage part for storing cables, even if an extremely long cable is used, the cable can be efficiently stored in a small space, and the transportability and operability of the safety barrier are hardly deteriorated. Therefore, good power supply performance and good transportability and operability of the safety barrier, which are mutually opposite effects, can be obtained at the same time, and a significant and special effect can be obtained.

[0034] In addition, as the cable storage part, a cable storage part having the same structure as a hose reel can be appropriately adopted, and the hose reel has a loading part, a reel body that can rotate freely relative to the loading part and around which the hose is wound, and a handle attached to the reel body that allows the reel body to rotate freely relative to the loading part. Alternatively, as the cable storage part, a cable storage part having the same structure as a cable storage structure using a coil spring in a vacuum cleaner can be appropriately adopted.

[0035] Effects of the Invention

[0036] According to the present disclosure, a safety barrier can be realized that is easily noticed by people and can effectively prevent people from entering a dangerous area. Even visually impaired people, children, and the elderly can easily identify the safety barrier and can effectively prevent people from entering an entry-blocking area. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a front view of a safety barrier according to an embodiment of the present disclosure, which prevents people from approaching an elevator shaft, when viewed from the outside in the depth direction of the shaft.

[0038] Figure 2 This is a top view of the safety barrier as viewed from above in the vertical direction.

[0039] Figure 3 It is a block diagram showing the main structure of the safety barrier.

[0040] Figure 4 This is a flowchart for explaining an example of control by a control device of a safety barrier for suppressing a person from intruding into an entry prevention area.

[0041] Figure 5 It is a schematic diagram illustrating the principle of triangulation. DETAILED DESCRIPTION

[0042] Below, the embodiments of the present disclosure are described in detail with reference to the accompanying drawings. In addition, below, in the case of including multiple embodiments, variations, etc., it is conceived from the beginning to construct a new embodiment by appropriately combining their characteristic parts. In addition, in the following embodiments, the same structure is marked with the same reference numerals in the drawings, and repeated descriptions are omitted. In addition, schematic diagrams are included in multiple drawings, and the dimension ratios of the vertical, horizontal, and height of each component may not be consistent between different drawings. In addition, the structural elements that are not recorded in the independent claims representing the highest-level concepts among the structural elements described below are arbitrary structural elements and are not essential structural elements. In addition, below, as the units of each physical quantity, it is assumed to adopt the MKS unit system.

[0043] Figure 1 This is a front view of a safety barrier 10 of one embodiment of the present disclosure for preventing a person from approaching the elevator shaft 1 when viewed from the outside in the depth direction of the shaft. Figure 2 This is a top view of the safety barrier 10 when viewed from the upper side in the vertical direction. Figure 1 As shown, the safety barrier 10 includes a barrier body 11 arranged to stand upright relative to the floor 2a of the landing station 2, a light emitting device 12 installed on the barrier body 11 and emitting light, a sound output device 13 installed on the barrier body 11 and outputting sound, a detection device 14 installed on the barrier body 11 and capable of detecting a person, and a timer 15 (see Figure 3 ) and the control device 40 (refer to Figure 3 ) The floor surface 2a of the landing 2 is an example of a placement surface.

[0044] When the ground 2a is substantially parallel to the horizontal plane, the gate body 11 may have a side whose normal is substantially parallel to the horizontal direction and can block the movement of people, and may have any structure. As the gate body 11, any structure used in various well-known safety gates may also be adopted. For example, the gate body 11 may have more than one wall portion, and when it has multiple wall portions, the relative position of other wall portions relative to one wall portion may be changed.

[0045] For example, Figure 1 As shown, the grid body 11 may also include a first wall portion 11a, a second wall portion 11b, and a third wall portion 11c. Each wall portion 11a, 11b, 11c may include a wooden or resin flat plate portion. Alternatively, each wall portion 11a, 11b, 11c may include a structure in which a sheet formed of cloth, resin, etc. is attached to a metal or resin frame, or the sheet may include a side surface that blocks the movement of a person.

[0046] In the present embodiment, each wall portion 11a, 11b, 11c includes a wooden or resin flat plate portion, and each wall portion 11a, 11b, 11c can be erected by the same structure as the structure in which the screen can be erected. In detail, each wall portion 11a, 11b, 11c has a sufficient area to maintain its own erected posture, and has a slender and substantially rectangular loading surface. In addition, each wall portion 11a, 11b, 11c has a column portion (pillar portion) 21a, 21b, 21c on both sides in the width direction in the erected posture. In the erected posture of the grid body 11, there is a second wall portion 11b on one side in the width direction of the first wall portion 11a, and there is a third wall portion 11c on the other side in the width direction of the first wall portion 11a.

[0047] For example, two adjacent pillars 21a, 21b, 21c are surrounded by the same annular belt or rope member (not shown) whose height position is restricted, and are constrained by the belt or rope member so that the relative position can be changed and cannot be separated. For example, this structure can be easily realized by providing a through hole for passing the belt or rope member at the same height portion around the end portion in the width direction of the adjacent wall portions 11a, 11b, 11c. The safety barrier 10 is transported in a state where the wall portions 11a, 11b, 11c are folded so that the wall portions 11a, 11b, 11c overlap in the thickness direction of the wall portion 11a.

[0048] like Figure 1 and Figure 2 As shown, the grid body 11 is erected on the floor 2a of the landing 2 in a manner that surrounds the lower side of the opening 4 created by the landing door 7 being opened. Figure 1 In the example shown, the first wall portion 11a is erected substantially parallel to the opening 4 in a manner opposed to the central portion in the width direction of the opening 4 in the depth direction of the hoistway 6. In addition, the second wall portion 11b is erected in a manner that blocks most of the gap between the end portion on one side in the width direction of the first wall portion 11a and the wall portion 9a on one side in the width direction of the opening 4 in the building 9. In addition, the third wall portion 11c is erected in a manner that blocks most of the gap between the end portion on the other side in the width direction of the first wall portion 11a and the wall portion 9b on the other side in the width direction of the opening 4 in the building 9.

[0049] The light emitting device 12 includes a first light emitting unit 12a, a second light emitting unit 12b, and a third light emitting unit 12c, and the sound output device 13 includes a first sound output unit 13a, a second sound output unit 13b, and a third sound output unit 13c. In addition, the detection device 14 includes a first detection unit 14a, a second detection unit 14b, and a third detection unit 14c. The first light emitting unit 12a, the first sound output unit 13a, and the first detection unit 14a are mounted on the outer surface of the first wall portion 11a on the side opposite to the entry prevention area side, and the second light emitting unit 12b, the second sound output unit 13b, and the second detection unit 14b are mounted on the outer surface of the second wall portion 11b on the side opposite to the entry prevention area side. In addition, the third light emitting unit 12c, the third sound output unit 13c, and the third detection unit 14c are mounted on the outer surface of the third wall portion 11c on the side opposite to the entry prevention area side.

[0050] It is preferred that the light emitting parts 12a, 12b, 12c, the sound output parts 13a, 13b, 13c and the detection parts 14a, 14b, 14c are provided in the central part in the width direction of the wall parts 11a, 11b, 11c to be installed. The light emitting surface of each light emitting part 12a, 12b, 12c is exposed to the outside of the above-mentioned outer surface of the wall parts 11a, 11b, 11c to be installed, and the speaker of the sound output part 13a, 13b, 13c is exposed to the outside of the above-mentioned outer surface of the wall parts 11a, 11b, 11c to be installed. In addition, the detection surface of the detection parts 14a, 14b, 14c is also exposed to the outside of the above-mentioned outer surface of the wall parts 11a, 11b, 11c to be installed.

[0051] Each light-emitting unit 12a, 12b, 12c has a light source including, for example, one or more LEDs (Light Emitting Diodes), one or more organic EL (Electro Luminescence) elements, one or more inorganic EL elements, one or more incandescent lamps, or one or more fluorescent lamps. In addition, each light-emitting unit 12a, 12b, 12c has a switch unit (not shown) composed of a transistor or the like, and the control device 40 performs on-off control of each switch unit. For example, in the case where the light source includes an LED, the light-emitting device 12 has a power conversion unit that converts AC power from a commercial power supply into DC power and steps down the voltage. When the control device 40 controls the switch unit to be turned on, DC power is supplied from the power conversion unit to the LED corresponding to the switch unit that is controlled to be turned on, and as a result, the corresponding LED emits light. The control device 40 and the power conversion unit are, for example, arranged inside the gate body 11.

[0052] Each sound output unit 13a, 13b, 13c includes a speech generator (not shown) that generates a synthesized sound under the control of the control device 40, and a speaker 23a, 23b, 23c that is electrically connected to the speech generator. The synthesized sound is synthesized by the speech generator according to a signal from the control device 40, and automatic speech based on the synthesized sound is output from the speakers 23a, 23b, 23c. The synthesized sound output by the speakers 23a, 23b, 23c will be described later.

[0053] Each detection unit 14a, 14b, 14c includes a human sensor, such as an ultrasonic sensor. The ultrasonic sensor transmits ultrasonic waves to a person through a transmitter and receives the reflected waves through a receiver, thereby detecting the presence of a person and the distance between the person. By calculating the relationship between the time required from the transmission to the reception of ultrasonic waves and the speed of sound, the distance from the ultrasonic sensor to the person can be calculated. In more detail, the ultrasonic sensor includes, for example, an ultrasonic AFE (analog front end) and ultrasonic transducers 24a, 24b, 24c, which are not shown.

[0054] The ultrasonic AFE receives a start trigger from the control device 40 and generates a pulse waveform. The ultrasonic transducers 24a, 24b, 24c convert electrical signals into ultrasonic waves, output transmission waves, and then receive reflected waves reflected by the human body. The ultrasonic transducers 24a, 24b, 24c generate electrical signals based on the received reflected waves and return them to the ultrasonic AFE. The ultrasonic AFE receives weak signals with high sensitivity. The ultrasonic AFE sends a stop trigger containing TOF (Time of flight) information to the control device 40. The control device 40 calculates the distance between the human body and the ultrasonic transducers 24a, 24b, 24c, for example, based on the time difference between the start trigger and the stop trigger.

[0055] As ultrasonic waves, for example, a frequency band of 30 kHz to 10 MHz can be used. The transmitting side and the receiving side of the detection units 14a, 14b, and 14c are grouped. When ultrasonic waves (voice pulses) are blocked by a person, they change from a normal state without obstacles to a state with rebound. The control device 40 performs human detection, etc. based on this change. In addition, TOF means time of flight, which is a method of measuring the time from when the emitted wave is reflected by an object and returns, and measuring the distance, etc.

[0056] The first detection unit 14a detects whether a person has entered a first area around an area overlapping with the first wall 11a in the normal direction of the outer surface of the first wall 11a, which is considered to be necessary to notify the person. In addition, the second detection unit 14b detects whether a person has entered a second area around an area overlapping with the second wall 11b in the normal direction of the outer surface of the second wall 11b, which is considered to be necessary to notify the person. In addition, the third detection unit 14c detects whether a person has entered a third area around an area overlapping with the third wall 11c in the normal direction of the outer surface of the third wall 11c, which is considered to be necessary to notify the person.

[0057] The first area and the second area may not overlap, or a part of the first area and a part of the second area may overlap. In addition, the first area and the third area may not overlap, or a part of the first area and a part of the third area may overlap. The control device 40 can narrow the relative area where the person exists with respect to the gate body 11 by determining the detection units 14a, 14b, and 14c that detect the person. In other words, the detection device 14 can detect relative position information related to the relative existence position of the person with respect to the gate body 11.

[0058] like Figure 2 As shown, the safety barrier 10 has a cable 30 for supplying power from a commercial power supply to the light emitting device 12, the sound output device 13, and the detection device 14; and a cable storage section 35 for storing the cable 30. The length of the cable 30 is set to be more than 2 meters. The cable storage section 35 has a loading section, a winding body 31 that can rotate freely relative to the loading section and on which the cable 30 is wound, and a handle 32 installed on the side of the winding body 31 and rotates the winding body 31 relative to the loading section. The cable storage section 35 has the same structure as a hose reel that winds a hose for water sprinkling purposes, etc. In addition, the cable storage section 35 can also have the same structure as the cable storage structure using a winding spring in a vacuum cleaner.

[0059] exist Figure 1 , the safety barrier 10 is shown to be installed at the lowermost landing 2 of the elevator 1. The cable 30 of the safety barrier 10 is extremely long, exceeding 2 m. The cable 30 extends from the barrier body 11 and passes through the opening 4, and then extends vertically downward in the hoistway 6 to the pit. In addition, the plug covering the terminal end of the cable 30 is connected to a socket installed in the pit. In this way, power is supplied to the electrical components 12, 13, and 14 via the socket installed in the pit.

[0060] The height distance from the lowest floor to the pit of the hoistway 6 in the elevator 1 is mostly 2m or more. In addition, pit work accounts for a large proportion of maintenance and inspection work, and pit work is mostly performed by installing the safety barrier 10 on the ground 2a of the lowest floor station 2. In such a background, in the present safety barrier 10, the cable 30 is extremely long in length of more than 2m, so that during pit work, the socket provided in the pit can be used to easily supply power to the electrical components 12, 13, and 14 of the safety barrier 10.

[0061] In addition, since the cable storage section 35 is provided for storing the cable 30, even if an extremely long cable 30 is used, the cable 30 can be stored efficiently in a small space, and the transportability and operability of the safety barrier 10 are hardly deteriorated. Therefore, a remarkable and special effect can be achieved that good power supply performance and good transportability and operability of the safety barrier 10, which are mutually contradictory effects, can be simultaneously obtained.

[0062] Figure 3 1 is a block diagram showing the main structure of the safety barrier 10. Figure 3 As shown, the control device 40 is appropriately configured by a computer, such as a microcomputer, and includes a control unit 41 and a storage unit 42. The control unit 41, that is, a processor, includes, for example, a CPU (Central Processing Unit). In addition, the storage unit 42 is composed of a hard disk drive (HDD), a solid state drive (SSD), etc., and may also include a non-volatile memory such as a ROM (Read Only Memory), a volatile memory such as a RAM (Random Access Memory). The storage unit 42 may be composed of only one storage medium, or may be composed of a plurality of different storage media. The CPU reads out and executes a program pre-stored in the storage unit 42, etc. In addition, the non-volatile memory pre-stores a control program, a specified threshold value, etc. In addition, the volatile memory temporarily stores the read program and processing data.

[0063] like Figure 3 As shown, the control device 40 receives a signal from the first detection unit 14a, a signal from the second detection unit 14b, and a signal from the third detection unit 14c. In addition, the control device 40 performs two-way communication with the timer 15. The timer 15 is, for example, provided in the gate body 11. The control device 40 controls at least one of the three light-emitting units 12a, 12b, 12c and the three sound output units 13a, 13b, 13c based on the signal received from at least one of the three detection units 14a, 14b, 14c and the timer 15.

[0064] Figure 41 is a flowchart for explaining an example of control of the control device 40 of the security gate 10 for suppressing the intrusion of a person into the blocking area. The first light emitting unit 12a, the first sound output unit 13a and the first detection unit 14a operate in association with each other, the second light emitting unit 12b, the second sound output unit 13b and the second detection unit 14b operate in association with each other, and the third light emitting unit 12c, the third sound output unit 13c and the third detection unit 14c operate in association with each other.

[0065] In addition, the first light emitting unit 12a, the first sound output unit 13a and the first detection unit 14a; the second light emitting unit 12b, the second sound output unit 13b and the second detection unit 14b; and the third light emitting unit 12c, the third sound output unit 13c and the third detection unit 14c operate independently of each other. Hereinafter, as an example, an operation for suppressing a person from intruding into the blocking area using the first light emitting unit 12a, the first sound output unit 13a and the first detection unit 14a will be described. The operation using the second light emitting unit 12b, the second sound output unit 13b and the second detection unit 14b and the operation using the third light emitting unit 12c, the third sound output unit 13c and the third detection unit 14c are the same as the operation using the first light emitting unit 12a, the first sound output unit 13a and the first detection unit 14a.

[0066] Reference Figure 4 The safety barrier 10 is appropriately installed at the landing 2. When the plug and the socket on the terminal side of the cable 30 are connected, the control starts. In step S1, the control device 40 determines whether a person is detected based on the signal from the first detection unit 14a. This step can be easily performed by determining whether the reflected wave contains a rebound component by the first detection unit 14a. The situation where the control device 40 determines that a person is detected based on the signal from the first detection unit 14a is consistent with the situation where the control device 40 determines that a person may enter the entry prevention area where the gate body 11 prevents the person from intruding. When it becomes a negative judgment in step S1, the control returns and the steps after step S1 are repeated.

[0067] On the other hand, when a positive determination is made in step S1, the process moves to step S2, and the control device 40 causes the first light emitting unit 12a to emit light. This step is performed by turning on the switch unit corresponding to the first light emitting unit 12a. In step S3 after step S2, the control device 40 determines whether the speed at which the person approaches the first detection unit 14a is greater than or equal to the first predetermined speed based on the signal from the first detection unit 14a and the signal from the timer 15.

[0068] The control device 40 determines the distance L1 [m] between the person and the first detection unit 14a at time T1, and the distance L2 [m] between the person and the first detection unit 14a at time T2 (a time after time T1) based on the signal from the first detection unit 14a. The control device 40 determines the elapsed time t [s] from time T1 to time T2 using the information from the timer 15. The control device 40 calculates the speed at which the person approaches the first detection unit 14a based on the following formula (1). When the control device 40 determines that the distance becomes L1, it outputs a signal indicating the start of timing to the timer 15, and when the control device 40 determines that the distance becomes L2, it outputs a signal indicating the end of timing and a signal to send information that can determine the elapsed time (elapsed time) to the timer 15. The control device 40 determines the elapsed time t based on the information that can determine the timing time sent from the timer 15 based on the output.

[0069] ((L1-L2) / t)[m / s]……(1)

[0070] When the determination is positive in step S3, in step S4, the control device 40 sets the volume level output by the first sound output unit 13a to the first volume level [dB (decibel)], and sets the prescribed time until the voice output to the first prescribed time [s]. The information of the first volume level and the information of the first prescribed time are pre-stored in the storage unit 42.

[0071] In step S5 after step S4, the control device 40 determines whether a person has been detected for a first predetermined time based on the signal from the first detection unit 14a and the signal from the timer 15. The control device 40 outputs a signal indicating the start of timing to the timer 15 when the person is first detected based on the signal from the first detection unit 14a. In addition, when the person is no longer detected based on the signal from the first detection unit 14a, the control device 40 outputs a signal indicating the end of timing and a signal to the timer 15 to send information that can determine the elapsed time (elapsed time). The control device 40 determines the time for which the person has been continuously detected based on the information that can determine the timing time sent based on the output. When a negative determination is made in step S5, the process moves to step S9, and the control device 40 turns off the first light-emitting unit 12a, and then the control returns to repeat the steps after step S1.

[0072] On the other hand, if the judgment is positive in step S5, the process moves to step S6, and under the control of the control device 40, the first sound output unit 13a outputs a voice warning of danger at the first volume level. The voice may be a voice with a word or phrase that has the effect of preventing people from intruding into the prohibited area. As the words or phrases of the voice, for example, "It is dangerous to approach the safety barrier.", "Please move to a position away from the safety barrier.", "There is an entry-prohibited area ahead.", etc. are considered.

[0073] The first volume level is set to be higher than the second volume level described later, and the first predetermined time is set to be shorter than the second predetermined time described later. Thus, for a person approaching the safety barrier 10 at a relatively fast speed, a warning voice can be output in a short time from the time when the first light emitting unit 12a emits light, and the warning voice can be output at a relatively high volume. Thus, it is possible to effectively prevent a person approaching the safety barrier 10 at a relatively fast speed from intruding into the blocking area.

[0074] In step S7 after step S6, the control device 40 determines whether a person is detected based on the signal from the first detection unit 14a. If it is determined to be positive in step S7, the steps after step S6 are repeated. On the other hand, if it is determined to be negative in step S7, the control device 40 transfers to step S8, turns off the first light-emitting unit 12a, and stops the voice output of the first sound output unit 13a, and then returns the control to repeat the steps after step S1.

[0075] Next, the case where a negative determination is made in step S3 is described. When a negative determination is made in step S3, the process moves to step S10, and the control device 40 determines whether the speed at which a person approaches the first detection unit 14a is less than or equal to the second predetermined speed based on the signal from the first detection unit 14a and the signal from the timer 15. The speed at which a person approaches the first detection unit 14a is calculated by the method described in step S3.

[0076] When a positive determination is made in step S10, the process proceeds to step S11, where the control device 40 sets the volume level output by the first sound output unit 13a to the first volume level [dB (decibel)], and sets the prescribed time until the voice output to the second prescribed time [s] (> the first prescribed time [s]). The information of the second prescribed time [s] is pre-stored in the storage unit 42.

[0077] In step S12 after step S11, the control device 40 determines whether a person has been detected for a second predetermined time based on the signal from the first detection unit 14a and the signal from the timer 15. The method for determining the time for which a person is continuously detected is the same as the method described in step S5. If a negative determination is made in step S12, the control from step S9 onwards is repeated, and on the other hand, if a positive determination is made in step S5, the control from step S6 onwards is repeated.

[0078] Elderly people are often those who walk slowly and have reduced hearing. In this embodiment, when a person approaches the first detection unit 14a slowly or approaches the intrusion prevention area slowly, the time until the sound is output is reduced. Therefore, it is possible to suppress the frequent output of voice, and it is possible to suppress the discomfort of people around the landing due to the voice output. In addition, the voice level of the voice output when a person walking slowly is detected for a second predetermined time is set to be larger than the second volume level described later, so even if the person walking slowly is an elderly person with reduced hearing, the warning voice can be reliably notified.

[0079] Finally, the control in the case of a negative determination in step S10 is described. When a negative determination is made in step S10, the process moves to step S13, and the control device 40 sets the volume level output by the first sound output unit 13a to the second volume level [dB] (< the first volume level [dB]), and sets the prescribed time until the voice output to the third prescribed time [s] (the second prescribed time > the third prescribed time > the first prescribed time). The information of the second volume level [dB] and the information of the third prescribed time [s] are pre-stored in the storage unit 42.

[0080] In step S14 after step S13, the control device 40 determines whether a person has been detected for a third predetermined time based on the signal from the first detection unit 14a and the signal from the timer 15. The method for determining the time for which a person is continuously detected is the same as the method described in step S5. If a negative determination is made in step S14, the control after step S9 is repeated.

[0081] On the other hand, if the determination is positive in step S14, the process proceeds to step S15. In step S15, under the control of the control device 40, the first sound output unit 13a outputs a voice warning of danger at the second volume level. The voice may be a voice having the effect of preventing a person from intruding into the blocking area. As the voice, the same words as those exemplified in step S6 can be used.

[0082] In this embodiment, the second volume level is lower than the first volume level. More specifically, the volume level of the voice is lower than that of the case where the speed of approaching the entry prevention area is fast and an emergency is required, or the speed of approaching the entry prevention area is slow and the possibility that the person approaching the entry prevention area is elderly is high. Therefore, the volume level is lower than that of the case where there is a special need, so it is possible to suppress the people around the landing from feeling uncomfortable due to the output of the voice.

[0083] In step S16 after step S15, the control device 40 determines whether a person is detected based on the signal from the first detection unit 14a. If it is determined to be positive in step S16, the steps after step S15 are repeated. On the other hand, if it is determined to be negative in step S16, the control device 40 goes to step S8, turns off the first light-emitting unit 12a, stops the voice output of the first sound output unit 13a, and then returns the control to repeat the steps after step S1. For example, when the plug is pulled out of the socket, Figure 4 The control ends.

[0084] As described above, the safety gate 10 comprises: a gate body 11, which is configured to stand upright relative to the ground (loading surface) 5a; a light-emitting device 12, which is installed on the gate body 11 and emits light; a sound output device 13, which is installed on the gate body 11 and outputs sound; a detection device 14, which is installed on the gate body 11 and can detect people; and a control device 40, which, based on a signal from the detection device 14, lights up the light-emitting device 12 when it is determined that a person may enter an entry-blocking area where the gate body 11 is used to block the intrusion of people, and when it is determined that the warning state continues for a specified time, causes the sound output device 13 to output a warning sound for warning attention.

[0085] According to the present disclosure, the control device 40 lights up the light emitting device 12 when it is determined that a person may enter the entry prevention area where intrusion is prevented by the gate body 11 based on the signal from the detection device 14. Therefore, it is easy for a person to recognize that he or she is approaching the entry prevention area, and it is possible to effectively prevent a person from entering the entry prevention area.

[0086] In addition, when the control device 40 determines that the notification state continues for a predetermined time, the sound output device 13 outputs a warning sound for warning attention. Thus, even people who easily miss the safety gate 10, such as visually impaired people, children who are absorbed in games, and the elderly, can easily recognize that they are approaching the entry prevention area, so that people can be more effectively prevented from entering the entry prevention area, and a safety gate with high safety can be realized.

[0087] Furthermore, when the alarm state is reached, the light emitting device 12 is made to emit light, and then, only when the situation that a person may enter the entry prevention area does not improve even after a predetermined time has passed, a warning sound is output. Therefore, it is possible to suppress the frequent output of the warning sound, and it is possible to suppress the discomfort of people around the safety barrier 10 due to the frequent output of the warning sound.

[0088] In addition, it is also possible to have a plurality of light emitting units 12a, 12b, 12c installed on the grid body 11 at intervals in the direction along the ground 2a of the grid body 11. In addition, the detection device 14 may also be able to detect relative position information related to the relative existence position of the person with respect to the grid body 11. Moreover, the control device 40 may also light up the proximity light emitting unit closest to the person among the plurality of light emitting units 12a, 12b, 12c according to the relative position information when it becomes the notification state. For example, as described using the above flowchart, this is achieved by causing the light emitting units 12a, 12b, 12c installed on the same wall 11a, 11b, 11c as the detection units 14a, 14b, 14c that detect the person to emit light as proximity light emitting units. In addition, the control device 40 may also light up one or more light emitting devices other than the proximity light emitting unit according to the relative position information when it becomes the notification state.

[0089] According to this configuration, when the notification state is reached, the control device 40 turns on the closest light emitting device to the person among the plurality of light emitting units 12a, 12b, 12c according to the relative position information. Therefore, the person can easily notice the lighting of the light emitting device 12 and can easily and quickly eliminate the notification state.

[0090] In addition, the detection device 14 may detect relative position information related to the relative position of the person relative to the gate body 11, and the sound output device 13 may change the maximum output direction of the warning sound. In addition, the control device 40 may change the maximum output direction according to the relative position information when the notification state continues for a predetermined time, so that the volume of the warning sound at the relative position becomes larger. For example, by using Figure 4 As described in the flowchart shown, this can be achieved by emitting light from the sound output units 13a, 13b, 13c installed on the same wall 11a, 11b, 11c as the detection units 14a, 14b, 14c that detect the person and closest to the detected person.

[0091] In addition, as an example of a sound output device capable of changing the above-mentioned maximum output direction, the sound output device 13 described in detail above having a plurality of speakers (preferably directional speakers) installed on the grill body 11 at intervals in the direction along the ground (installation surface) 3a is considered. In addition, as another example of a sound output device capable of changing the above-mentioned maximum output direction, a sound output device having an actuator (such as a motor) capable of changing the orientation (direction) of the speaker is considered.

[0092] According to this structure, when the notification state continues for a predetermined time, the control device 40 changes the maximum output direction according to the relative position information to increase the volume of the warning sound at the relative existence position. Therefore, people are more likely to notice the warning sound, which can more effectively prevent people from entering the entry prevention area.

[0093] In addition, a speed detection unit may be provided, which can detect an approach-related speed related to the approach speed of a person approaching the gate body 11. In addition, when the control device 40 determines that the approach-related speed is greater than the first prescribed speed, the control device 40 performs at least one of shortening the prescribed time and increasing the volume of the warning sound compared to the case where the approach-related speed is included in a prescribed speed range smaller than the first prescribed speed.

[0094] In this embodiment, each detection unit 14a, 14b, 14c and the timer 15 constitute a speed detection unit, and the approach speed of each detection unit 14a, 14b, 14c is calculated. In addition, the approach speed is consistent with the approach-related speed related to the approach speed of a person approaching the gate body 11. In addition, the specified speed area V [m / s] where the approach-related speed is smaller than the first specified speed is set to the range of the following formula (2). In formula (2), the first specified speed is Figure 4 The first prescribed speed shown in step S3 is, and the second prescribed speed is Figure 4 The second prescribed speed shown in step S10.

[0095] 1st prescribed speed [m / s]>V[m / s]>2nd prescribed speed [m / s]……(2)

[0096] In this embodiment, when a person approaches the gate body 11 at a speed higher than the specified speed, a warning sound is output in a short time after the notification state is reached, so that the person can be effectively prevented from entering the entry prevention area before the warning sound is output. In addition, when a person approaches the gate body 11 at a speed higher than the first specified speed, the volume of the warning sound is increased, so that the person can be effectively prevented from entering the entry prevention area.

[0097] In addition, the following case is described: when a person approaches the barrier body 11 at a speed higher than a predetermined speed, a warning sound is output for a short time after the alarm state is reached, and the volume of the warning sound is increased. However, when a person approaches the safety barrier at a speed higher than a predetermined speed, only one of the following may be performed: the warning sound is output for a short time after the alarm state is reached, and the volume of the warning sound is increased. Alternatively, even if a person approaches the safety barrier at a speed higher than a predetermined speed, the warning sound may not be output for a short time after the alarm state is reached, and the volume of the warning sound may not be increased.

[0098] In addition, there may also be a speed detection unit that is capable of detecting an approach-related speed related to the approach speed of a person approaching the gate body 11. When the control device 40 determines that the approach-related speed is below the second prescribed speed, the volume of the warning attention sound is increased compared to the case where the approach-related speed is included in a prescribed speed area greater than the second prescribed speed.

[0099] In addition, in the present embodiment, the prescribed speed region in which the approach-associated speed is greater than the second prescribed speed is consistent with the speed region of V [m / s] shown in formula (2). Not only is it difficult for the elderly to notice the safety gate, but it is also difficult for them to hear the sound. According to the present structure, when it is determined that the approach-associated speed is below the second prescribed speed, the volume of the warning sound becomes louder. Therefore, the elderly who walk slowly can easily notice the warning sound, and thus, the elderly can be effectively restrained from entering the entry-blocking area. In addition, the control device may not increase the volume of the warning sound compared to the case where the approach-associated speed is included in the prescribed speed region greater than the second prescribed speed.

[0100] Furthermore, the warning sound may be a voice with words or phrases that have the effect of preventing people from intruding into the prohibited area.

[0101] According to this structure, a person can recognize that there is an entry-blocking area ahead by the content of the voice. Thus, it is possible to effectively prevent a person from entering the entry-blocking area. In addition, in this embodiment, it is described that the reminder sound is a voice of words and phrases that have the effect of preventing a person from intruding into the entry-blocking area. However, the reminder sound may not be a voice, but may be a warning sound (reminder sound), such as the sound of a buzzer.

[0102] The present disclosure is not limited to the above-described embodiment and its modifications, and various improvements and changes can be made within the scope of the matters described in the claims of the present application and their equivalents.

[0103] For example, in the above embodiment, a case is described where a light emitting unit 12a, 12b, 12c, a sound output unit 13a, 13b, 13c, and a detection unit 14a, 14b, 14c are respectively mounted on the plurality of wall portions 11a, 11b, 11c of the grid body 11. However, two or more light emitting units, two or more sound output units, and two or more detection units may be mounted on the plurality of wall portions of the grid body.

[0104] Alternatively, only one light emitting unit, only one sound output unit, and only one detection unit may be installed on the grid body. In addition, in this case, it is preferred that only one light emitting unit, only one sound output unit, and only one detection unit are installed on a wall portion located in the central portion, for example.

[0105] In addition, the case where the cable 30 for supplying power to the electrical components 12, 13, and 14 of the safety barrier 10 is longer than 2 m is described. However, the cable for supplying power to the electrical components of the safety barrier may be longer than 1 m, or may be longer than 3 m. Alternatively, the safety barrier may not have a cable for supplying power to its electrical components, or may be a structure driven by a battery.

[0106] In addition, the detection device may detect distance information related to the distance to the person, and as the distance becomes shorter, the control device increases the volume of the warning sound in stages or continuously. In this way, as the person moves toward the entry prevention area, the volume of the warning sound increases in stages or continuously, thereby effectively preventing the person from entering the entry prevention area.

[0107] In addition, the detection device may not detect the relative position information related to the relative existence position of the people with respect to the grid body. In addition, the sound output device may not change the maximum output direction of the maximum output in the warning sound.

[0108] In addition, the above-mentioned notification state can be based on information of a signal from a detection device. In detail, the control device can determine that the above-mentioned notification state is in effect when the detection device detects a person. Alternatively, the control device can also determine that the above-mentioned notification state is in effect when the intensity of a person detection signal detected by the detection device becomes above a prescribed intensity. Alternatively, the control device can also determine that the above-mentioned notification state is in effect when the distance between the detection device and the person becomes below a prescribed distance. Alternatively, the control device can also determine that the above-mentioned notification state is in effect when it is determined that a person has invaded a prescribed area based on a signal from the detection device.

[0109] In addition, the safety barrier may also be provided at a landing other than the landing of the lowest layer. In this case, for example, power may be supplied to the electrical components by connecting the plug at the terminal side of the power cable to the socket at the landing or the socket on the car.

[0110] In addition, the case where the detection device 14 includes an ultrasonic sensor is described. However, the detection device may include a LiDAR sensor instead of an ultrasonic sensor. The LiDAR sensor uses one or more lasers to measure the distance. The LiDAR sensor emits a laser of a set wavelength, receives its return signal, and measures the distance. When measuring the distance based on the emission and reception of the laser, a technique of triangulation, time of flight, or phase shift is used.

[0111] Figure 5 is a schematic diagram illustrating the principle of triangulation. Figure 5As shown in (a), (b), and (c), the laser light irradiated on the human body and reflected on the surface of the human body forms an image on the light receiving element (CMOS) through the light receiving lens. When the distance to the human body changes, the angle when receiving the reflected light changes, and the position of the image on the light receiving element changes. The change in the distance to the human body (the amount of movement) can be calculated based on the change in the imaging position on the light receiving element, and the position of the human body can be determined. Alternatively, the detection device can also be a device that senses infrared rays. Heat is radiated from the human body. The detection device can also detect the human body by sensing the radiation of this heat.

[0112] In addition, the case where the safety barrier is installed at the landing of the elevator 1 is described. However, the safety barrier can be installed for any purpose where it is desired to prevent people from entering the prohibited area. For example, the safety barrier can be installed to prevent people from falling onto the trusses of an escalator, a moving walkway, etc. Alternatively, the safety barrier can be used to prevent people from entering the prohibited area of ​​a construction site.

[0113] Description of symbols

[0114] 1: elevator; 2: landing; 2a: ground; 4: opening; 6: shaft; 7: landing door; 9: building; 9a, 9b: building wall; 10: safety barrier; 11: barrier body; 11a: first wall; 11b: second wall; 11c: third wall; 12: light emitting device; 12a: first light emitting unit; 12b: second light emitting unit; 12c: third light emitting unit; 13: sound output device; 13a: first sound output unit; 13b: second sound output unit Output unit; 13c: third sound output unit; 14: detection device; 14a: first detection unit; 14b: second detection unit; 14c: third detection unit; 15: timer; 21a, 21b, 21c: column; 23a, 23b, 23c: speaker; 24a, 24b, 24c: ultrasonic transducer; 30: cable; 31: winding body; 32: handle; 35: cable storage unit; 40: control device; 41: control unit; 42: storage unit.

Claims

1. A safety barrier, comprising: A grid body configured to stand upright relative to the mounting surface; A light emitting device, which is mounted on the grid body and emits light; A sound output device, which is installed on the grille body and outputs sound; A detection device, which is installed on the grid body and can detect people; as well as A control device, based on a signal from the detection device, lights up the light-emitting device when it is determined that a person may enter an entry-blocking area where the gate body is used to block the person from intruding, and causes the sound output device to output a warning sound to draw attention when it is determined that the warning state continues for a specified time.

2. The safety barrier according to claim 1, wherein: The safety barrier has a plurality of light emitting parts, and the plurality of light emitting parts are mounted on the barrier body at intervals in a direction along the installation surface of the barrier body. The detection device is capable of detecting relative position information related to the relative position of the person relative to the grid body. When the notification state is reached, the control device lights up the proximity light emitting portion closest to the person among the plurality of light emitting portions based on the relative position information.

3. The safety barrier according to claim 1 or 2, wherein: The detection device is capable of detecting relative position information related to the relative position of the person relative to the grid body, The sound output device is capable of changing the maximum output direction of the warning sound in which the maximum output is achieved. When the notification state continues for the predetermined time, the control device changes the maximum output direction based on the relative position information so that the volume of the attention-calling sound at the relative existence position becomes louder.

4. The safety barrier according to any one of claims 1 to 3, wherein: The safety barrier has a speed detection unit capable of detecting an approach-related speed related to an approach speed of a person approaching the barrier body. When the control device determines that the approach-related speed is equal to or higher than a first prescribed speed, the control device at least either shortens the prescribed time or increases the volume of the warning sound compared to a case where the approach-related speed is included in a prescribed speed range that is smaller than the first prescribed speed.

5. The safety barrier according to any one of claims 1 to 4, wherein: The safety barrier has a speed detection unit capable of detecting an approach-related speed related to an approach speed of a person approaching the barrier body. When the control device determines that the approach-related speed is equal to or lower than a second predetermined speed, the control device increases the volume of the warning sound compared to a case where the approach-related speed is included in a predetermined speed range greater than the second predetermined speed.

6. The safety barrier according to any one of claims 1 to 5, wherein: The detection device is capable of detecting distance information related to the distance from the person, As the distance becomes shorter, the control device increases the volume of the warning sound in stages or continuously.

7. The safety barrier according to any one of claims 1 to 6, wherein: The warning sound is a voice of words or phrases having the effect of preventing a person from intruding into the entry prevention area.

8. The safety barrier according to any one of claims 1 to 7, wherein: The safety barrier has: a cable for supplying power from a power source to the light emitting device, the sound output device, and the detection device; and a cable storage portion, which is used to store the cable, The length of the cable is more than 2 m.

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