JP2016136475A - Inclination detection device and accident detection guard fence employing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inclination detection device capable of easily adjusting detection accuracy, having durability and capable of surely detecting an inclination in any environment, and an accident detection guard fence employing the same.SOLUTION: An inclination detection device 1 is configured to detect that an installed object is inclined, and comprises: a conductive ball 4 formed of a spherical body with which a conductive layer is formed on its surface; a cone-shaped recess 30 which is inclined downwards to a center with the conductive ball 4 mounted thereon; and an electrification circuit 6 that is in an electrified state at all the time while including a contact terminal 5 formed of a rod material and a power source 60 (battery) which are disposed in the vicinity of a center of the recess 30 with a vertical direction as a length direction. The contact terminal 5 includes a plurality of plus terminals 50 and minus terminals 51, the plus terminals being as many as the minus terminals, and the plus terminals 50 and the minus terminals 51 are alternately disposed at intervals shorter than a diameter of the conductive ball 4, and the electrification of the electrification circuit 6 is cut off if the conductive ball 4 is separated from the contact terminal 5, such that the inclination is detected .SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tilt detection device that detects that an installed object is tilted more than a certain level. More specifically, the tilt detection device detects the tilt of a guard fence post, and the vehicle collides with the guard fence, causing an accident. The present invention relates to an accident detection / protection fence that detects the occurrence of an accident.

  2. Description of the Related Art Conventionally, an inclination detection device that detects that an installed object is inclined more than a certain level is known. For example, Patent Document 1 discloses a housing (housing 1) made of an insulating member and a plurality of electrodes (contact pins 5 to 5) provided circumferentially in the housing (housing 1) with a certain interval therebetween. 12) and a movable body (spherical contact 4) arranged between the electrodes (contact pins 5 to 12) and having at least a surface formed in a spherical shape by a conductive member, and the movable body when the housing (housing 1) is inclined. An attitude detecting device is disclosed in which (ball contact 4) is in an energized state by contacting any two of a plurality of electrodes (contact pins 5 to 12) to detect inclination and change in attitude (Patent Document 1). (See claim 1 of the claims, page 2, upper right column, line 15 to page 3, upper right column, line 12, page 3, etc.).

  Patent Document 2 discloses a non-conductive hollow cylindrical case 2, a non-conductive lower substrate 1 and an upper substrate 4 attached to the bottom and top surfaces of the case 2, and a space in the case 2. And the upper substrate 4 and the lower substrate 1 are respectively formed on the surface inside the case 2 around the recess C in the central portion and the pattern A as the first conductive pattern and the second conductive material. The pattern B as the sexual pattern is isolated and alternately arranged, and the pattern A42, 44, pattern B41, 43 of the upper substrate 4 faces the pattern B12, 14, pattern A11, 13 of the lower substrate 1, respectively. 2 is attached to the top and bottom surfaces of the tilt / vibration switch which is in a conductive state only when the metal sphere 3 contacts the pattern A and the pattern B at the same time, and is in a non-conductive state in other cases. Ji is disclosed (see claim 1 of the claims of the patent document 2, specification paragraphs [0014] - [0018], figures 1, 3, etc.).

  However, the attitude detection device described in Patent Document 1 detects a tilt when a sphere made of a conductive member comes into contact with an electrode when tilted, and an abnormality such as a disconnection or a component loss occurs due to a collision or the like. In such a case, there is a problem that it is not notified, the abnormality is left unattended, and it does not operate when it is necessary to detect an accident. In addition, the attitude detection device described in Patent Document 1 and the tilt / vibration switch described in Patent Document 2 are configured such that the conductive contact terminal pattern A and the pattern B have horizontal spacing and vertical installation height according to the size of the conductive sphere. It is necessary to arrange a large number of all of them with high accuracy, and there is a problem that the structure becomes complicated and the manufacturing cost increases.

  On the other hand, in Patent Document 3, two terminal plates 3 are arranged opposite to each other in the central portion of the recess 2 in which the central portion of the body 1 is lowered, and the opposing inner edges of the two terminal plates 3 are substantially in the same circular locus. A gap is formed between the terminal plates 3 at the top, and a cap 4 is put on the body 1, and a conductive ball 6 is slidably inserted in a space 5 formed by the body 1 and the cap 4. An overturning / electric shock switch is disclosed in which 6 is placed on the inner peripheral edge of the opposing terminal plate 3 and the terminal plates 3 are electrically connected to each other via a sphere 6 (claim of patent document 3) Item 1, paragraphs [0008] to [0012] of the specification, and FIGS.

  The overturning / electric shock switch described in Patent Document 3 is a switch in which the ball 6 moves and breaks the electrical contact between the two terminal boards 3 via the ball 6 when there is a fall or an earthquake. In this way, it is possible to provide a tip-down / seismic switch at a low cost with a simple configuration with a small number of parts without using mercury, which causes environmental damage, and the opposing inner edges of two opposing terminal boards are located. By simply changing the diameter of the arc on the inner periphery of the terminal board so that the diameter of the circular locus changes, the sensitivity of the switch to the tilt and vibration of the device can be adjusted, and it can be easily adapted to products with different sensitivities. Has been.

  However, since the fall / electric shock switch described in Patent Document 3 is a mode in which the sphere 6 is fitted in the recess 2 and the periphery thereof is supported by the terminal plate 3, the recess 2 is used when the tilt is small or the impact is small. There is a problem that the ball 6 is difficult to come off from the terminal board 3. Further, there is a problem that it is difficult to adjust the sensitivity only by the diameter of the hole provided in the terminal plate 3 and the diameter of the sphere 6, and even if this problem can be solved, the diameter of the hole and the sphere of the terminal plate 3 The diameter of 6 requires extremely high accuracy, and there is a problem that the production cost is high.

  Patent Document 4 discloses an impact sensor 11 fixed to a road, an accident detection means (satellite emergency terminal 12) for detecting the occurrence of an accident from an output signal of the impact sensor 11, and an accident by the accident detection means. Accident detection characterized by comprising a communication means for establishing a communication line with the headquarters 30 installed in the emergency contact information of the accident and transmitting information on the accident when the occurrence of the accident is detected An apparatus 10 and an accident detection system using the same are disclosed (see claim 1 of patent document 4, paragraphs [0009] to [0023] of the specification, FIGS. 1 and 4 of the drawings, etc.) ).

  However, the accident detection apparatus 10 and the accident detection system using the accident detection apparatus described in Patent Document 4 perform communication using a communication satellite system and have a problem that installation cost and running cost are very high. In addition, since the accident detection device 10 described in Patent Document 4 uses a cable sensor, there is a problem that it is not possible to specify where the accident has occurred in a long cable, and in addition, the cable sensor is stretched. Has a problem that it requires a strong tension and is not suitable for installation in a curved portion or a corner portion where accidents frequently occur.

  In addition, the accident detection apparatus 10 and the accident detection system using the accident detection system described in Patent Document 4 have an accident when an accident occurs and the cable sensor is broken or the satellite emergency terminal 12 is damaged. There is a problem that the detection cannot be transmitted to the command unit 30 by the communication means, and the accident cannot be detected.

JP 60-24411 A Japanese Patent Laid-Open No. 9-265881 JP-A-6-52763 JP 2000-227989 A

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is to easily adjust the detection accuracy and to be durable and reliably tilt in any environment. It is an object of the present invention to provide an inclination detection device capable of detecting the accident and an accident detection protection fence using the inclination detection device.

  An inclination detection apparatus according to a first aspect of the present invention is an inclination detection apparatus that detects that an installed object is inclined, and includes a conductive sphere composed of a sphere having a conductive layer formed on a surface thereof, and the conductive sphere placed thereon. And a mortar-shaped recess that slopes downward toward the center, and a contact terminal and a power supply circuit that are normally energized with a contact terminal and a power source arranged in the longitudinal direction near the center of the recess. The contact terminals each have a plurality of the same number of positive terminals and negative terminals, and the positive terminals and the negative terminals are alternately arranged at intervals shorter than the diameter of the conductive sphere, Inclination is detected when the energization of the energization circuit is cut off from the contact terminal.

  According to a second aspect of the present invention, there is provided a tilt detecting device according to the first aspect, wherein the energization circuit includes a measurement circuit that measures the voltage or current of the energization circuit and whether the voltage or current measured by the measurement circuit is equal to or less than a predetermined value. A determination circuit for determining whether or not the energization is conducted, and when the determination circuit determines that the energization circuit is not energized continuously for a predetermined time or more, it is detected that the vehicle is inclined.

  According to a third aspect of the present invention, there is provided the tilt detection apparatus according to the second aspect, further comprising a wireless device capable of transmitting or responding the determination result of the determination circuit at predetermined time intervals by wireless communication.

  In a tilt detection device according to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the contact terminal is disposed near the center of the recess, and the upper end of each terminal is the recess. A positive terminal and a negative terminal are alternately arranged in a circumferential direction at a position higher than the lowest point.

  According to a fifth aspect of the present invention, in the tilt detection apparatus according to the fourth aspect of the present invention, the plurality of contact terminals are installed such that all of the upper ends thereof have the same height.

  According to a sixth aspect of the invention, in the fourth or fifth aspect of the invention, the plurality of contact terminals are all disposed in through holes formed near the center of the recess. .

  An accident detection protection fence according to a seventh aspect of the present invention is an accident detection protection fence comprising a plurality of support columns using pipes and a horizontal member laid between the support columns, covering the upper end of the support columns and communicating radio waves. When the inclination detecting device according to any one of claims 1 to 6 is installed on the upper portion of the support column and the inclination detection device detects the inclination of the support column, It is characterized by detecting that an accident has occurred.

  According to an eighth aspect of the present invention, there is provided an accident detection / protection fence according to the seventh aspect of the present invention, further comprising a storage container for storing the conductive ball, a pedestal in which the recess is formed, and the contact terminal, A radio device and an antenna for transmitting or receiving communication radio waves of the radio device are accommodated in a side of the housing container, and an outer shell container that can be inserted and removed is provided on an upper portion of the support column.

  According to the first to sixth inventions, since the inclination is detected when the conducting ball is separated from the contact terminal and the energization of the energization circuit which is always energized is interrupted for a predetermined time or more, there is a risk that parts are worn or broken. Less is. Further, according to the first to sixth inventions, the detection accuracy can be easily adjusted by the inclination angle of the recess, etc., and the conductive sphere is not easily fitted into the recess and is not easily detached. In addition, according to the first to sixth inventions, since the mechanism is simple, not only is it durable, but it is possible to reliably detect the inclination in any environment.

  In particular, according to the second invention, whether or not the energization circuit is energized is determined by a measurement circuit that measures the voltage or current of the energization circuit and whether the voltage or current measured by the measurement circuit is equal to or less than a predetermined value. And determining that the installed object is tilted more accurately because it is detected that the energizing circuit is not energized continuously for a predetermined time or longer in the determining circuit. Thus, not only the detection accuracy is improved, but also the detection accuracy and sensitivity can be easily adjusted.

  In particular, according to the third aspect of the invention, since the wireless device capable of transmitting or responding the determination result of the determination circuit at predetermined time intervals by wireless communication is provided, the wireless device can know the presence or absence of the inclination from a remote location.

  In particular, according to the fourth to sixth inventions, the contact terminal is disposed near the center of the bottom of the recess, and the upper end of each terminal is positioned higher than the lowest point of the recess. Since the negative terminals are alternately arranged side by side in the circumferential direction, when the conductive ball returns to the vicinity of the center of the concave portion due to the inclination of the concave portion, both the positive terminal and the negative terminal can be reliably contacted and energized. Therefore, there is little risk of false detection.

  In particular, according to the fifth aspect of the present invention, since the plurality of contact terminals are installed such that the heights of the upper ends are all the same, the contact terminals and the conductive balls are of the same height. Point contact between the tip and the spherical surface makes it possible to reliably energize, further reducing the possibility of erroneous detection.

  According to the seventh and eighth aspects of the present invention, there is provided an accident detection protection fence comprising a plurality of columns using pipes and a horizontal member temporarily installed between the columns, the columns covering the upper ends of the tubes. The tilt detection device according to any one of claims 1 to 6 is installed on an upper portion of the support column, and the tilt detection device detects the tilt of the support column. In this case, since it is detected that an accident has occurred, the accident can be detected even when the support column itself is destroyed by the accident. Moreover, even if parts are worn out or the apparatus is broken, it is detected as an accident, so there is little risk that the trouble will be neglected. In addition, according to the seventh and eighth inventions, the detection accuracy can be adjusted by the inclination angle of the mortar-shaped recess, the weight of the conductive sphere, etc., so that it does not operate in a minor collision or a small earthquake. Various adjustments are possible. In addition, since the occurrence of an accident can be ascertained for each column with an inclination detector set, the location of the accident can be clearly identified, and it is easy to install the protective fence on the corners and corners.

  In particular, according to the eighth aspect of the present invention, the apparatus includes a storage container that stores the conductive sphere, the pedestal in which the recess is formed, and the contact terminal, and the wireless device and the wireless device below the storage container. Since the antenna for transmitting or receiving the communication radio wave is housed in the side of the housing container, and the outer shell container that can be inserted and removed is provided on the upper part of the support column, the tilt detection device can be made compact and space-saving on the support fence column. In addition to being able to be easily set, maintenance work such as battery replacement and parts replacement can be performed in a short time, and running costs can be reduced.

1 is a vertical sectional view schematically showing a tilt detection apparatus according to an embodiment of the present invention. It is a perspective view which shows a part of storage container of an inclination detection apparatus same as the above in the vertical cross section. It is a perspective view which shows a part of base of an inclination detection apparatus same as the above in the vertical cross section. It is a partial expanded sectional view which mainly shows the conductive ball and contact terminal of an inclination detection apparatus same as the above. It is a top view which shows the contact terminal and through-hole of an inclination detection apparatus same as the above. It is a circuit diagram which shows typically the electricity supply circuit of the inclination detection apparatus same as the above. It is a vertical sectional view showing typically an accident detection protection fence concerning an embodiment of the present invention. It is a perspective view which shows a cap of an accident detection protection fence same as the above, and a part of outer shell container in a vertical cross section. FIG. 9 is a vertical cross-sectional view illustrating a state in which a column of the accident detection protection fence in FIG. 8 is tilted. It is a top view which shows the state which returned to the center of the base after the conductive ball of the accident detection protection fence same as the above rolled.

  Hereinafter, an inclination detection device and an accident detection protection fence according to an embodiment of the present invention will be described in detail with reference to the drawings.

[Inclination detector]
First, an inclination detection device according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the tilt detection apparatus 1 according to the embodiment of the present invention mainly includes a storage container 2 that is a casing of the entire apparatus, a pedestal 3 stored in the storage container 2, and the pedestal 3. And a plurality of contact terminals 5 that are energized by contact with the conductive sphere 4 and an energization circuit 6 that is always energized with a power source.

(Container)
As shown in FIG. 2 and the like, the container 2 includes a container body 20 that is a bottomless cylindrical tube body, and a disc-shaped lid body 21 that covers the upper end of the container body 20. A pedestal 3 to be described later, which is a component part of the tilt detection device 1 including the contact terminals 5, is attached to the lower end of the container body 20.

  Of course, the shape of the storage container 2 is not limited to a cylindrical tube, and may be other shapes such as a rectangular parallelepiped, a cube, and a polygonal column as long as it can accommodate the components of the tilt detection device 1. It doesn't matter. Further, the lid 21 may not be provided, and a hook portion may be provided on the edge of the upper end of the container main body 20 so as to be caught by an object on which the storage container 2 is installed.

  The container body 20 and the lid body 21 are preferably sealed and sealed with a sealing material, a rubber elastic body, or the like for moisture proofing and drip proofing.

(pedestal)
As shown in FIG. 3 and the like, the pedestal 3 is a resin-made pedestal that has a substantially disk shape with a diameter just enough to fit within the container body 20 of the storage container 2. A mortar-shaped concave portion 30 that is inclined downward is formed. In the pedestal 3 according to the present embodiment, the inclination angle of the recess 30 is set to 20 degrees (see FIG. 4 and the like). Of course, it goes without saying that the inclination angle may be set as appropriate together with the weight of the conductive sphere 4 so as to exhibit a desired detection accuracy (detection sensitivity).

  The pedestal 3 uses the inclination of the concave portion 30 to guide the conductive ball 4 to be positioned at the center of the concave portion 30 at normal times and maintain the energized state. The conductive ball 4 has a function to freely move so as to roll. In addition, because of this inverted frustoconical inclination, the inclination detection device 1 has a detection accuracy equivalent to all inclinations of 360 degrees.

  Further, the pedestal 3 does not have to be made of resin as long as it has a structure in which the conductive ball 4 is movably mounted. In short, the material or the like is not particularly limited as long as the mortar-shaped concave portion 30 is formed in an inverted conical shape and inclined downward at an equal angle of 360 degrees toward the center.

  As shown in FIGS. 3 to 5, a rectangular (square) through-hole 31 that penetrates from the top surface to the bottom surface of the base 3 is formed in the bottom surface at the center of the recess 30. Of course, it goes without saying that the shape of the through hole 31 may be a circular hole in a plan view.

(Conductive sphere)
As shown in FIG. 4 and the like, the conductive sphere 4 is a metal sphere having a diameter of 20 mm and a weight of about 40 gf (392 N), which is slidably mounted on the recess 30 of the pedestal 3. By contacting the plus terminal 50 and the minus terminal 51 of the contact terminal 5, the energization circuit 6 is closed and electricity flows through the energization circuit 6.

  Of course, the conductive ball 4 has a conductive layer made of a good conductive material having a small electric resistance such as metal or carbon formed on at least the surface layer so that the positive terminal and the negative terminal of the contact terminal 5 can be electrically connected. Any movable sphere may be used, and the entire sphere may not be made of metal.

(Contact terminal)
As shown in FIGS. 4 to 6, the contact terminal 5 is a terminal provided on the energizing circuit 6 made of a metal bar material such as iron or copper extending vertically, and is formed on the bottom surface at the center of the recess 30. It is disposed in the provided through hole 31 and is attached so as to protrude slightly upward from the through hole 31. The contact terminal 5 has a plurality of the same number of plus terminals 50 and minus terminals 51, and the plus terminals 50 and minus terminals 51 are alternately arranged at intervals shorter than the diameter of the conductive sphere 4.

  As shown in FIG. 4, the contact terminal 5 according to the present embodiment is formed of a spring-like metal bar whose tip is curved according to the curved surface of the conductive sphere 4 and is elastically deformable. As shown in FIG. 5, the positive terminals 50 and the negative terminals 51 are alternately arranged in a square shape (square corners) at intervals of 2.6 mm in a plan view narrower than the diameter of 20 mm of the conductive balls 4 each having two pins (two pins). This is a terminal with a 4-pin structure.

  Of course, the contact terminal 5 is not limited to the 4-pin structure, but has a slightly larger number of pin structures, and the same number of positive terminals 50 and negative terminals 51 are alternately spaced at equal intervals shorter than the diameter of the conductive sphere 4 by 20 mm. Then, they may be arranged side by side in the circumferential direction in plan view. With this configuration, even when the conductive ball 4 is once separated from the contact terminal 5 due to slight vibration or the like, the conductive ball 4 returns to the bottom side of the concave portion 30 due to the inverted conical inclination of the concave portion 30, and the arrangement of the contact terminals 5 is changed. This is because, when contacting from the outside, it is possible to ensure energization by reliably contacting both the positive terminal 50 and the negative terminal 51.

  In addition, the contact terminal 5 is installed at a position where the upper ends of both the plus terminal 50 and the minus terminal 51 are slightly higher than the lowest point of the recess 30, that is, the upper end of the through hole 31, and the upper ends are all the same height. It is installed so as to have a height (see FIG. 4). For this reason, when the conductive sphere 4 returns to the top of the through hole 31 provided at the center of the bottom of the concave portion 30 due to the mortar-shaped inclination of the concave portion 30, the contact between the contact terminal 5 and the conductive sphere 4 is the same. This is point contact between the tip of the rod body and the spherical surface, so that the energization circuit 6 can be reliably energized, and the possibility of erroneous detection is further reduced (see also FIG. 10).

(Energization circuit)
As shown in FIG. 6, the energization circuit 6 is an electronic circuit in a normally energized state having the above-described contact terminal 5 and a battery 60 as a power source, and the conductive sphere 4 is moved from the contact terminal 5 by tilting the container 2. This is a mechanism for detecting that the container 2 is tilted when the energization circuit 6 opens and the current is interrupted. Note that a commercial power source may be used as a power source instead of the battery 60 by a wire.

  In addition to the energization circuit 6, the inclination detection device 1 includes a voltage measurement circuit V that measures the voltage of the energization circuit 6, and an energization circuit depending on whether the voltage measured by the voltage measurement circuit V is equal to or less than a predetermined value. 6 is provided with a determination circuit (not shown) for determining the presence / absence of energization. In this determination circuit, when it is determined that the energization circuit 6 is not energized continuously several times by the determination for each control time, that is, for a predetermined time or more, it is detected that the inclination detection device 1 is inclined. Then, it is preferable because erroneous detection due to fine vibrations can be prevented.

  Of course, whether or not the energization circuit 6 is energized is determined by determining whether the energization circuit 6 is energized by determining whether the energization circuit 6 is energized based on whether the current measured by the current measurement circuit is a certain value or less. Needless to say, the determination circuit may be used.

(Wireless equipment)
Further, the inclination detection device 1 is provided with a wireless device 7 capable of responding to the presence / absence of energization of the energization circuit 6 determined by the determination circuit at predetermined time intervals by wireless communication (see FIG. 1). Of course, the wireless device 7 may transmit the presence / absence of energization of the energization circuit 6 determined by the determination circuit. However, in the case where the power source is a power storage type power source such as the battery 60, it is preferable to have a configuration capable of responding by wireless communication so as not to consume much power.

  The wireless device 7 includes a wireless communication module 70 capable of wireless communication in the 920 MHz band, and an antenna 71 that transmits or receives communication radio waves of the wireless communication module 70. The presence or absence can be communicated wirelessly. Also, 920MHz band wireless communication has a long reach compared to 2.4GHz band wireless communication and has high diffractive properties, so it can communicate around obstacles. Suitable for long distance communication.

  According to the inclination detecting device 1 described above, since the conductive ball 4 is separated from the contact terminal 5 and the energization of the energization circuit 6 which is always energized is interrupted for a predetermined time or more, the inclination is detected. Less likely to be missed. In addition, the detection accuracy can be easily adjusted by the inclination angle of the recess 30 and the weight of the conductive sphere 4, and the conductive sphere 4 is not easily fitted into the recess 30. In addition, since the mechanism is simple, not only is it durable, but it can reliably detect the inclination in any environment.

[Accident detection protection fence]
Next, the accident detection protection fence which concerns on embodiment of this invention which applied the inclination detection apparatus 1 mentioned above to the support | pillar of a protection fence is demonstrated using FIGS. Since the inclination detection device 1 has the same configuration, the same reference numerals are given and detailed description thereof is omitted.

  As shown in FIG. 7, the accident detection / protection fence 10 according to the present embodiment includes a cylindrical column 11 with an open upper end, a flat dome-shaped cap 12 that covers the upper end of the column 11, and the cap 12. A cylindrical outer shell container 13 that is fitted into the column 11 and is inserted into the upper portion of the column 11, and the inclination detector 1 is installed in the outer shell container 13 so that the vehicle is outside the road. It is an accident detection protective fence that functions as a protective fence that prevents the vehicle from deviating and detects an accident by detecting that the column 11 has tilted due to a vehicle or the like colliding with the column 11.

  This accident detection / protection fence 10 may be a beam-type protection fence such as a guard rail in which a rail beam is bridged between a plurality of columns 11, a guard pipe in which a pipe beam is bridged, or a box beam in which a box beam is bridged. A gable-type protective fence in which a guard cable is stretched between the plurality of columns 11 may be used. The present invention can also be applied to a beam-type protective fence for bridges. In short, any protective fence may be used as long as the above-described inclination detecting device 1 can be inserted into each column or every column having a predetermined interval such as every corner.

(Support)
As shown in FIG. 7, the support column 11 is a general steel support column, but a metal cap is not attached to the support column in which the inclination detection device 1 is inserted. This is because the protective fence is required to have a function of restoring the traveling direction of the vehicle in addition to the above-mentioned function of preventing the vehicle from departing from the road. This is because it is difficult to provide.

(cap)
As shown in FIG. 8 and the like, the cap 12 is a cap that is attached to the support column 11 in which the above-described tilt detection device 1 is inserted, and is made of resin for transmission and reception of communication radio waves. Of course, the cap 12 is not limited to a resin as long as it is configured to transmit communication radio waves, and is not limited to a dome shape as long as the cap 12 can be covered so that the upper end of the column 11 is not exposed.

(Outer shell container)
As shown in FIG. 8 and the like, the outer shell container 13 is a bottomed cylindrical tube made of resin, and functions as a housing that houses the entire inclination detection device 1. As long as the outer shell container 13 has the same shape as the container 2 and can accommodate the components of the inclination detection device 1, the material and the like are not particularly limited. However, it is required that the material does not hinder wireless communication.

  Further, the outer diameter of the outer shell container 13 is set to be slightly larger than the inner diameter of the cap 12, and the outer shell container 13 is fitted into the cap 12 by fitting the outer shell container 13 into the cap 12. For this reason, not only can the outer shell container 13 and the inclination detection device 1 be easily inserted into the support 11 by simply placing the support 11 on the support 11 whose upper end is released, but also replacement of the battery 60 and replacement of parts. Such maintenance work can be performed in a short time, and the running cost can be reduced.

  As shown in FIG. 7, the outer shell container 13 houses the wireless communication module 70 of the wireless device 7 at the bottom, the housing container 2 at the top, and the antenna 71 at the side of the housing container 2. So that it is housed. For this reason, the inclination detection apparatus 1 can be inserted in the support | pillar 11 compactly.

  Further, around the container 2, the wireless communication module 70, and the antenna 71, a cushioning material 14 made of a foamed resin such as urethane foam or a fiber material such as glass wool is filled. For this reason, it is difficult for the tilt detection device 1 to break down with a slight impact.

[Flow of detection of accident detection protection fence]
Next, the detection flow of the accident detection protection fence 10 will be described in detail.
In normal times when no accident occurs, the conductive ball 4 is placed on the four contact terminals 5 protruding from the through holes 31 on the bottom surface of the recess 30, and between the plus terminal 50 and the minus terminal 51. The energizing circuit 6 electrically connected by the conductive ball 4 is in an energized state (see FIGS. 4 and 7).

  Then, when an accident occurs and a vehicle or the like collides with the column 11 on which the inclination detecting device 1 is inserted, or when the vehicle collides with a fence, the column 11 is 20 degrees as shown in FIG. When the conductive ball 4 falls from the recess 30 to a position where the conductive ball 4 cannot contact the contact terminal 5 as described above, the energization of the energization circuit 6 is interrupted and an accident is detected by the accident detection protection fence 10.

  Further, in a light impact such that the vehicle rubs against the fence, even when the conductive ball 4 is detached from the contact terminal 5, the conductive ball 4 rolls back to the center of the concave portion 30 due to the inclination of the concave portion 30, and the concave portion 30 Even without returning to the center, as shown in FIG. 10, the two contacts of the plus terminal 50 and the minus terminal 51 are brought into contact. Therefore, it is possible to detect only a severe accident in which the column 11 is tilted by 20 degrees or more due to a strong impact of a certain level or more. Of course, it goes without saying that this inclination angle can be appropriately set according to the application based on experiments and the like. That is, it is possible to easily adjust the effective range of the detection accuracy by adjusting the inclination angle of the recess 30 and the weight of the conductive ball 4 so as not to detect the accident as a slight vibration.

  In addition, the wireless device 7 of the accident detection / protection fence 10 is a mechanism that responds to the determination result in the above-described determination circuit in response to an inquiry for each control time by wireless communication in the 920 MHz band from a wireless base such as a traffic information center. . For this reason, various adjustments, such as certifying an accident, are possible only when the accident certification at the radio base is answered that the radio device 7 is not continuously energized a plurality of times. In this embodiment, the control time is set to about 30 seconds.

  According to the accident detection / protection fence 10 described above, if there is no response from the wireless device 7, if an accident is recognized, a large impact is applied and even if the tilt detection device 1 is destroyed, the accident is detected. Can be detected.

  Further, according to the accident detection protection fence 10, when a failure occurs in the tilt detection device 1 and no current flows through the energization circuit 6, an accident is detected, and the failure is not left as it is. For this reason, even if it breaks down, it can be repaired promptly and the occurrence of an accident can be reliably detected.

  Moreover, according to the accident detection / protection fence 10, since the occurrence of the accident can be grasped for each support column in which the inclination detection device 1 is set, the location of the accident is clearly identified, and the curve or corner of the protection fence can be specified. Is easy to install.

  As described above, the tilt detection device according to the embodiment of the present invention and the accident detection protection fence using the tilt detection device have been described in detail. However, each of the above-described or illustrated embodiments is a specific embodiment in which the present invention is implemented. These are merely examples, and the technical scope of the present invention should not be construed in a limited manner. In particular, the 920 MHz band wireless communication module has been described as an example of the wireless device, but any wireless device can be adopted as long as it is a communication device capable of long-distance wireless communication.

  In addition, the tilt detection device has been described with an example of detecting the tilt of the support column, but the use of the tilt detection device is not limited to these, and the installed object is tilted, such as detecting the fall of a stove, earthquake or vibration. Needless to say, the tilt detection apparatus according to the present invention can be applied to a part of the purpose of detecting whether or not it has been performed.

1: Inclination detection device 2: Container 20: Container body 21: Lid 3: Base 30: Recess 31: Through hole 4: Conductive ball 5: Contact terminal 50: Positive terminal 51: Negative terminal 6: Current supply circuit 60: Battery (Power supply)
7: Wireless device 70: Wireless communication module 71: Antenna 10: Accident detection fence 11: Support column 12: Cap 13: Outer shell container 14: Buffer material

Claims (8)

An inclination detection device for detecting that an installed object is inclined,
A conductive sphere composed of a sphere having a conductive layer formed on the surface, a mortar-shaped concave portion that is placed on the conductive sphere and tilts downward toward the center, and the vertical direction is disposed in the vicinity of the center of the concave portion in the vertical direction. A contact terminal made of bar material and a power supply circuit having a power supply and having a power supply at all times,
The contact terminals have a plurality of the same number of plus terminals and minus terminals, respectively, and the plus terminals and the minus terminals are alternately arranged at intervals shorter than the diameter of the conductive sphere,
An inclination detection device that detects inclination when the conductive ball leaves the contact terminal and the energization of the energization circuit is interrupted. A measurement circuit that measures the voltage or current of the energization circuit, and a determination circuit that determines whether or not the energization circuit is energized based on whether the voltage or current measured by the measurement circuit is equal to or less than a certain value,
The tilt detection device according to claim 1, wherein when the determination circuit determines that the energization circuit is not energized continuously for a predetermined time or more, the tilt detection device detects that the tilt is present. The tilt detection device according to claim 2, further comprising: a wireless device capable of transmitting or responding the determination result of the determination circuit at predetermined time intervals by wireless communication. The contact terminal is disposed near the center of the recess, and a positive terminal and a negative terminal are alternately arranged in the circumferential direction at a position where the upper end of each terminal is higher than the lowest point of the recess. The tilt detection device according to any one of claims 1 to 3, wherein The inclination detecting device according to claim 4, wherein the plurality of contact terminals are installed such that all of the upper ends thereof have the same height. 6. The tilt detection device according to claim 4, wherein the plurality of contact terminals are all disposed in a through hole formed near a center of the recess. An accident detection protection fence comprising a plurality of columns using pipes and a horizontal member temporarily installed between the columns,
The support column includes a cap that covers an upper end of the pipe material and transmits communication radio waves, and the tilt detection device according to any one of claims 1 to 6 is installed on an upper portion of the support column. An accident detection protection fence characterized by detecting that an accident has occurred when the inclination of the column is detected by a detection device. While comprising a container for housing the conductive sphere, a pedestal in which the recess is formed, and the contact terminal,
The wireless device and an antenna for transmitting or receiving communication radio waves of the wireless device are accommodated in a side of the housing container below the housing container, and an outer shell container that can be inserted and removed is provided on an upper portion of the support column. The accident detection protection fence according to claim 7 characterized by things.

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