JP2016053479A - Screw looseness monitoring system, screw removal monitoring system, and screw looseness or removal monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screw looseness monitoring system capable of ensuring safety of a communication channel, where the need for a cost of equipment such as a cable for wire communication is eliminated to reduce an installation cost.SOLUTION: A system comprises one or more washer sensors 10 (a screw looseness detecting apparatus) and a predetermined communication terminal 20. Each of the washer sensors 10 comprises a lead switch 1 (screw looseness sensing means) for sensing a looseness condition of screw fastening means having a male screw member for fastening a member to be fastened and a female screw member, and a wireless communication section 5 for wirelessly transmitting the result of the looseness condition of the screw fastening means sensed by the screw looseness sensing means to the predetermined communication terminal 20. The communication terminal 20 comprises a transmit/receive antenna 65 for receiving the transmission, a communication processing apparatus 64, and display means 61 for displaying the looseness condition sensing result of the screw fastening means received via the communication processing apparatus 64. The lead switch 1 (screw looseness sensing means) comprises a magnetic sensor for sensing screw looseness according to change in a surrounding magnetic field environment.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a screw looseness monitoring system, a screw removal monitoring system, and a screw loosening or separation monitoring system for monitoring the looseness state or screw release state of a screw fastening means comprising a male screw member and a female screw member for fixing a member to be fixed.

Fixed members such as bridges such as girder bridges, arch bridges, suspension bridges, railway facilities, tunnel structures, piping structures such as flange joints and tanks, support structures for various engine mounts, and various support structures in tunnels, It is fastened and fixed by screw fastening means comprising a male screw member and a female screw member. It is extremely important to monitor the fastening state of the screw fastened and fixed by such a screw fastening means in order to prevent a major accident.
Previously, the inspector periodically visited the site, for example, by marking the fixed member and the screw fastening means with paint, etc., and detecting rotational looseness from the misalignment between the two by visual inspection In addition, a hammering method or the like in which a screw fastening means is struck with a hammer and an operator determines looseness by the hitting sound is performed.
As a method of measuring axial force using a sensor,
1) A method of monitoring the tightening load by placing a load meter under the bolt or nut.
2) A method of processing a bolt and monitoring the axial force of the bolt with a built-in strain detection element,
3) A method of measuring an axial force by resonance by applying ultrasonic waves or the like to a bolt is known.

In addition, as a prior art for detecting displacement of bolts and nuts,
Patent Document 1 (Japanese Patent Laid-Open No. 7-279936), Patent Document 2 (Japanese Patent Laid-Open No. 7-280762) and Patent Document 3 (Japanese Patent Laid-Open No. 2010-281697) have been proposed.
Among these, the screw looseness detection device disclosed in Patent Document 1 is a screw looseness detection device for detecting the looseness of the male screw body and the female screw body for fixing the member to be fixed. The cap is fixed to the protruding portion of the male screw body protruding from the body with a gap from the female screw body, and the conductive portion provided on the cap side and the conductive portion provided on the female screw body side Are arranged to face each other with the gap therebetween, and are electrically connected to the conductive portion on the cap side and the conductive portion on the female screw body side, so that the male screw body and the female screw body are loosened, and these conductive It is set as the structure which provided the sensor which detects that the sex parts contacted and it became the conduction | electrical_connection state.
The looseness detection device disclosed in Patent Document 2 is a looseness detection device that detects the looseness of a bolt and a nut that fixes a member to be fixed, and is a protruding end of a bolt that is screwed together and protrudes from a nut. A contact detection member having a conductive portion that is disposed in proximity to the outer periphery of the screwed nut and is in contact with the nut by relative rotation of the nut with respect to the bolt; A sensor is provided that is electrically connected to the conductive portion and the nut and detects that the conductive portion and the nut are brought into contact with each other and become conductive.

Further, the misalignment detector disclosed in Patent Document 3 is a misalignment detector used for detecting a relative misalignment between a fixed member and a movable member that can move relative to the fixed member. ,
A first member fixed to the fixing member and formed of a nonconductor;
It is integrally formed with the movable member and moves relative to the fixed member, and is disposed in a region perpendicular to the moving direction of the relative movement and corresponding to the first member, and is formed of a nonconductor. A second member,
Have
Either one of the first member and the second member includes a detection IC tag capable of non-contact communication with an external device, and the other is a conductor, and is a blocking material that blocks communication of the detection IC tag. With
When the second member moves relative to the first member by a predetermined amount or more from the initial state in which the relative positions of the first member and the second member are aligned, the movement direction of the relative movement is From the state in which the detection IC tag is located within the area of the shielding material, or the state where the detection IC tag is located outside the area of the shielding material, It is set as the structure changed from the state located outside to the state located in the area | region of the said shielding material.

JP 07-279936 A JP 07-280762 A JP 2010-281697 A

However, the conventional screw looseness detection means, for example, in the case of the screw looseness detection means described in Patent Documents 1 to 3, is a communication means for notifying this fact to a remote place when a displacement of a bolt or nut is detected. Wired communication is being used. Such a wired communication means has a problem that equipment costs such as cables increase and the installation cost becomes high.
Further, the wired communication means has a problem that the probability that at least a part of the cable is damaged or broken increases as the cable of the communication path becomes longer. In addition, when there are misalignment of bolts and nuts at multiple points at the same time, each is detected sequentially, so it takes time and effort to accurately grasp the entire system, leading to delays in recovery. There was a problem.
Furthermore, in the prior art described in Patent Documents 1 to 3 described above, when a screw loosening detection device is applied to an existing bolt or nut, it is necessary to remove the bolt or nut or combine two or more parts. There is a need. For example, the method of measuring the axial force using the sensors 1), 2), and 3) has a drawback that the system becomes large and the cost increases.

Moreover, since the prior art of Patent Document 1 and Patent Document 2 is a method for detecting contact with a contact detection member, it is vulnerable to water droplets and the like, and malfunctions due to contamination and deterioration of the contact portion are also expected. Must be said to be unsuitable.
Furthermore, the positional deviation detection tool and the positional deviation detection system according to Patent Document 3 require a special dedicated bolt for the IC tag to be fixed to the installation surface, which increases costs and at the same time, multipoint looseness detection monitor. There is a problem that is impossible.
The present invention has been made in view of the above circumstances, and the object of the first invention is to eliminate the need to remove an existing fixed member and screw fastening means or to perform additional processing, A screw looseness detection device that can be easily installed on a screw fastening means and is stably held, can detect a screw looseness state accurately over a long period of time, and can be manufactured at low cost, and a predetermined communication terminal. It is an object of the present invention to provide a monitoring system capable of easily and inexpensively monitoring the loosening of the screw fastening means over a point over a long period of time.
Further, the object of the second invention is to remove the existing fixed member and the screw fastening means even when fixing the fixed member over a plurality of stages with a plurality of screw fastening means, There is no need for reassembly, installation is possible with the current state preserved, it can be easily installed on the fixed member and screw fastening means, and it can be stably held, and the screw looseness state can be accurately maintained over a long period of time. Provided is a monitoring system capable of easily and cost-effectively monitoring looseness of screw fastening means at multiple points by means of a screw looseness detection device that can be detected and manufactured at a low cost and a predetermined communication terminal. There is.

The object of the third invention is to reliably detect a detachment of a bolt as a male screw member as a screw fastening means or a nut as a female screw member, thereby preventing a major accident in advance. There is no need to remove existing bolts or nuts to adapt to the installation, or any additional work, screws that can be installed easily, can be detected stably over a long period of time, and can be manufactured and installed at low cost. Provided is a monitoring system capable of easily and inexpensively and stably monitoring the disengagement of screw fastening means at multiple points by a disengagement detection device capable of detecting disengagement and a predetermined communication terminal. There is.
The object of the fourth invention is not only the loosening of bolts and nuts as screw fastening means, but also bolts with sensors and nuts with sensors capable of reliably detecting the removal of bolts and nuts, and predetermined communication terminals. Thus, it is an object of the present invention to provide a monitoring system that can easily and inexpensively monitor the disengagement of the screw fastening means at multiple points over a long period of time.
Furthermore, the object of the fifth invention is to detect a slack or detachment of the screw fastening means with the use of a bolt with a sensor or nut with a sensor and a predetermined communication terminal, so that a major accident can occur. An object of the present invention is to provide a system that can prevent loosening or separation over a long period of time and can be easily installed so as to be compatible with multi-point installation and can be manufactured and installed at low cost.

In order to achieve the above-described object, the screw looseness monitoring system according to the first invention described in claim 1
One or more screw looseness detection devices, and each screw looseness detection device comprises a predetermined communication terminal provided separately from each other,
Each of the screw looseness detection devices,
A screw looseness detecting means for detecting a looseness state of a screw fastening means comprising a male screw member and a female screw member for fixing the fixed member;
First wireless communication means for wirelessly transmitting a looseness state detection result of the screw fastening means by the screw looseness detection means to the predetermined communication terminal;
With
The predetermined communication terminal is:
Second wireless communication means for receiving the transmission;
Display means for displaying a looseness state detection result of the screw fastening means received via the second wireless communication means;
It is characterized by having.

The screw looseness monitoring system according to the first invention described in claim 2 is the screw looseness monitoring system according to claim 1,
The predetermined communication terminal further includes information input means, and among the one or more screw looseness detection devices, for a specific screw looseness detection device that needs to know the looseness detection result of the screw fastening means, A connection request signal for requesting connection is transmitted through the second wireless communication unit together with the code of the specific screw looseness detection device input through the input unit,
Each of the one or more screw looseness detection devices that have received the connection request signal via the first wireless communication means has the code of the specific screw looseness detection device included in the connection request signal as A wirelessly transmitted result of looseness detection of the screw fastening means by the screw looseness detection means to the predetermined communication terminal via the first wireless communication means when it matches the code stored in advance. It is a feature.

The screw looseness monitoring system according to the first invention described in claim 3 is the screw looseness monitoring system according to claim 1,
Each of the one or more screw looseness detection devices includes:
When the looseness state is detected by the screw loosening detection means by the screw loosening detection means, the predetermined communication is performed via the first wireless communication means together with a code stored in advance as information indicating the fact of the detection. It is characterized by being transmitted to the terminal.

The screw looseness monitoring system according to the first invention described in claim 4 is the screw looseness monitoring system according to any one of claims 1 to 3,
The one or more screw looseness detecting devices are:
A rotating member having an engaging portion that engages with the male screw member or the female screw member, and a magnet disposed in a part near the periphery;
A body member that rotatably supports the rotating member and is provided with a magnetically sensitive switch in proximity to the rotating range of the magnet, and is attracted and fixed to the fixed member by a magnetic force attracting member; Consists of
The engagement member is engaged with the male screw member or the female screw member while the fixed member is fastened and fixed by the screw fastening means, and the main body member is moved at an initial position where the magnetically sensitive switch and the magnet face each other. In a state where the fixed member is disposed and fixed to the fixed member via the magnetic force adsorbing member, the screw fastening means is loosened and the rotating member is rotated, and the magnet is rotated at a predetermined angle from the initial position with respect to the magnetically sensitive switch. It is characterized in that the loose state of the screw is detected by rotating and switching the magnetically sensitive switch.

The screw looseness monitoring system according to the second invention described in claim 5 is the screw looseness monitoring system according to any one of claims 1 to 3,
The one or more screw looseness detecting devices are:
A rotating member having an inner engagement portion that engages with the male screw member or the female screw member, and a magnet disposed in a part near the periphery;
It has an inner space that rotatably supports the rotating member, and is provided with a magnetic sensitive switch close to the rotating range of the magnet, and is fixed to the fixed member by a magnetic force absorbing member. A body member to be made,
A first notch having a predetermined width reaching the engaging portion in the inner space from the outer periphery of the rotating member is formed, and a second notch having a predetermined width reaching the inner space from the outer periphery of the main body member is formed. And
In a state where the fixed member is fastened and fixed by the screw fastening means, the engaging portion is brought close to the screw fastening means from the lateral direction through the first and second notches, and the engaging portion is made the male screw member or the female screw. In a state where the main body member is disposed and fixed to the fixed member via the magnetic force adsorbing member at an initial position where the magnetic sensitive switch and the magnet are opposed to each other, the screw fastening means is loosened. The rotating member is rotated, the magnet is rotated by a predetermined angle from the initial position with respect to the magnetic sensitive switch, and the magnetic sensitive switch is switched to detect a loose state of the screw. Yes.

The screw looseness monitoring system according to the second invention described in claim 6 is the screw looseness monitoring system according to claim 5,
The first notch formed in the rotating member and the second notch formed in the main body member are arranged in the rotating member in a relative rotation range in which the first notch does not match at all. The magnetic sensitive switch and the magnet are in an initial position facing each other.

In order to achieve the above object, a screw looseness monitoring system according to a third invention described in claim 7 is provided.
One or more screw detachment detecting devices for detecting the detachment of the screw fastening means including the male screw member and the female screw member for supporting the fixed member from the fixed member, and each screw detachment detecting detection device are provided apart from each other. With a predetermined notification terminal,
Each of the screw removal detection devices,
A sensor member having a contactor that is variable between a projecting position and a pushing position and is spring-biased on the projecting position side, and a changeover switch that switches a circuit between the projecting position and the pushing position; and A main body member for holding the member; and a magnetic force adsorbing member for adsorbing and fixing the main body member to the fixed member. The contactor is used as the screw fastening means in a state where the fixed member is supported by the screw fastening means. The main body member is fixed to the fixed member by the magnetic force adsorbing member in a state of being in contact and pushed from the protruding position to the pushing position, and when the screw fastening means is detached from the fixed member, the sensor When the contact of the member is detached from the screw fastening means and protrudes to the projecting position and the circuit of the sensor member is switched, the detached state of the screw fastening means is detected. And the screw separation detecting means for,
First wireless communication means for wirelessly transmitting a result of detection of the disengagement state of the screw fastening means by the screw disengagement detection means, to the predetermined communication terminal;
With
The predetermined communication terminal is:
Second wireless communication means for receiving the transmission;
Display means for displaying a looseness state detection result of the screw fastening means received via the second wireless communication means;
It is characterized by having.

A screw detachment monitoring system according to a third aspect of the present invention is the screw detachment monitoring system according to claim 7,
The predetermined communication terminal further includes an information input means, and among the one or more screw disengagement detection devices, for a specific screw disengagement detection device that needs to know the disengagement state detection result of the screw fastening means, A connection request signal for requesting a connection is transmitted through the second communication unit together with the code of the specific screw detachment detecting device input through the input unit,
Each of the one or more screw disengagement detection devices that have received the connection request signal via the first communication means has the code of the specific screw disengagement detection device included in the connection request signal in advance. When the stored code coincides with the stored code, a result of detecting the disengagement state of the screw fastening means by the screw disengagement detecting means is wirelessly transmitted to the predetermined communication terminal via the first communication means. Yes.
The screw detachment monitoring system according to a third aspect of the present invention is the screw looseness monitoring system according to claim 7 or 8,
Each of the one or more screw disengagement detection devices includes a code that self-stores information indicating the fact of the detection when the disengagement state is detected by the screw disengagement detection unit by the screw disengagement detection unit. It transmits to the said predetermined | prescribed communication terminal via a 1st communication means, It is characterized by the above-mentioned.

A screw detachment monitoring system according to a fourth invention described in claim 10 is:
Each screw loosening or detachment detection device, and each screw loosening or detachment detection device comprises a predetermined communication terminal provided separately from each other,
The screw loosening or separation detecting device is
A screw fastening means comprising a bolt and a nut for fixing a member to be fixed, which is integrally formed so as to concentrically overlap a flange-like portion having a disk shape having a diameter larger than the outer shape of the bolt on the screw forming side of the bolt. A screw that detects the loosening or disengagement of the bolt in cooperation with a magnetically-sensitive switch that is prepared separately, with a magnet as a sensor disposed in the vicinity of the periphery of the bowl-shaped part. Or with a withdrawal detection means,
First wireless communication means for wirelessly transmitting to the predetermined communication terminal a result of detection of looseness or disengagement of the screw fastening means by the screw loosening or removal detection means;
With
The predetermined communication terminal is:
Second wireless communication means for receiving the transmission;
Display means for displaying a looseness or disengagement state detection result of the screw fastening means received via the second wireless communication means;
It is characterized by having.

According to a fourth aspect of the present invention, a monitoring system includes:
A screw loosening or detachment detecting device for a nut with a sensor for detecting looseness or detachment of a screw fastening means comprising a bolt and a nut for fixing the fixed member from the fixed member;
A predetermined communication terminal provided separately from each screw loosening or separation detecting device;
The screw loosening or separation detecting device is
A screw fastening means comprising a bolt and a nut for fixing a member to be fixed, wherein a hook-like portion having a disk shape with a diameter larger than the outer shape of the nut is integrally formed so as to be concentrically overlapped with the nut. A screw looseness or detachment detecting means for detecting a looseness or detachment of the nut in cooperation with a separately provided magnetic sensing switch, wherein a magnet as a sensor is disposed in the vicinity of the periphery of the bowl-shaped portion. When,
First wireless communication means for wirelessly transmitting to the predetermined communication terminal a result of detection of looseness or disengagement of the screw fastening means by the screw loosening or removal detection means;
With
The predetermined communication terminal is:
Second wireless communication means for receiving the transmission;
Display means for displaying a looseness or disengagement state detection result of the screw fastening means received via the second wireless communication means;
It is characterized by having.

The screw looseness or detachment monitoring system according to a fifth aspect of the present invention is the screw loosening or detachment monitoring system according to claim 11,
The predetermined communication terminal is:
In addition, a connection request signal for requesting connection to a specific screw disengagement detecting device that has information input means and needs to know a disengagement state detection result of the screw fastening device among the one or more screw disengagement detecting devices. Is transmitted via the second communication means together with the code of the specific screw detachment detecting device input via the input means,
Each of the one or more screw disengagement detection devices that have received the connection request signal via the first communication means has the code of the specific screw disengagement detection device included in the connection request signal in advance. When the stored code coincides with the stored code, a result of detecting the disengagement state of the screw fastening means by the screw disengagement detecting means is wirelessly transmitted to the predetermined communication terminal via the first communication means. Yes.

According to a thirteenth aspect of the present invention, there is provided the screw loosening or screw removal monitoring system according to the fifth aspect of the present invention.
Each of the one or more screw disengagement detection devices includes a code that self-stores information indicating the fact of the detection when the disengagement state is detected by the screw disengagement detection unit by the screw disengagement detection unit. It transmits to the said predetermined | prescribed communication terminal via a 1st communication means, It is characterized by the above-mentioned.
The screw loosening or screw removal monitoring system according to a third aspect of the present invention is the screw loosening or screw removal system according to any one of claims 10 to 13,
The screw loosening or screw detachment detecting device comprising the sensor-equipped bolt or the sensor-equipped nut,
In the state where the hook-like part is fitted in a through hole having an inner diameter slightly larger than the outer diameter of the hook-like part, a magnetically sensitive switch is provided close to the rotation range of the magnet, and the fixed It consists of a body member that is attracted to the member by a magnetic adsorption member,
The through hole is inserted into the hook-shaped part of the bolt with sensor or the nut with sensor in a state where the fixed member is fastened and fixed by the bolt with sensor or the nut with sensor, and the magnetically sensitive switch and the magnet In the state where the main body member is arranged and fixed to the fixed member via the magnetic force adsorbing member at an initial position opposite to each other, the bolt with sensor or the nut with sensor is loosened and the bowl-shaped portion rotates, Alternatively, the sensor-equipped bolt or the sensor-equipped nut is detached, the magnet is rotated by a predetermined angle from the initial position with respect to the magnetic sensitive switch, or a predetermined amount is removed and the magnetic sensitive switch is switched, It is characterized by detecting whether a screw is loose or detached.

The screw looseness or screw detachment monitoring system according to a fifth aspect of the present invention is the screw loosening or screw detachment monitoring system according to any one of claims 10 to 14,
The screw loosening or screw detachment detecting device comprising the sensor-equipped bolt or the sensor-equipped nut,
The magnet is arranged so as to be proximate to a rotation range of the magnet arranged in the bowl-shaped portion, and a magnetically sensitive switch sensitive to the magnet is arranged, and the fixed member has the above-mentioned It consists of a holder body member that is adsorbed by a magnetic adsorption member,
The holder body member is brought close to the bowl-shaped portion in a state where the fixed member is fastened and fixed by the bolt with sensor or the nut with sensor, and the holder is in an initial position where the magnetism sensitive switch and the magnet face each other. In a state where the main body member is arranged and fixed to the fixed member via the magnetic force adsorbing member, the bolt with sensor or the nut with sensor is loosened to rotate the hook-shaped part, or the hook-shaped part is detached. The magnet is rotated by a predetermined angle from the initial position with respect to the magnetic sensitive switch, or is removed by a predetermined amount, and the magnetic sensitive switch is switched to detect the looseness of the screw or the detached state of the screw. It is said.

According to the present invention, the wireless communication means is used as a communication means for notifying a predetermined terminal at a remote place when a displacement of the screw fastening means composed of bolts and nuts is detected. Therefore, the installation cost can be reduced.
Moreover, in the conventional wired communication means, as the cable of the communication path becomes longer, there is a problem that at least a part of the cable is damaged or broken, but the wireless communication means is used. By doing so, the effect which can improve the reliability of a communication channel is also acquired.
In addition, in the conventional wired communication means, when there are misalignment of bolts and nuts at multiple points at the same time, it takes time and effort to grasp the accurate state of the entire system, and recovery may be delayed, According to the present invention, there is an effect that it is possible to grasp in real time the state of all the screw fastening means managed by the screw loosening monitoring system by using wireless communication means with a predetermined communication terminal. .
Further, according to the screw looseness detection device of the present invention, it is not necessary to remove existing fixed members and screw fastening means or to perform additional processing, and can be installed in a state where the current state is preserved. Therefore, installation work is not required, installation work can be performed simply, quickly and stably on the fixed member by means of magnetic adsorption, and the looseness of the screw fastening means can be detected stably over a long period of time. It is possible to provide a screw looseness detection device having excellent environmental resistance that can withstand outdoor use because it can be performed at a very low processing cost and installation cost, and does not require structural maintenance.

The effects of the first to fifth inventions will be described below.
According to the first aspect of the present invention, it is not necessary to remove the existing fixed member and the screw fastening means or to perform additional processing, and it is easily installed on the fixed member and the screw fastening means. Screws that can be manufactured stably at low cost, capable of being held stably, with no structural maintenance, excellent environmental resistance to withstand outdoor use, and accurate detection of screw looseness over a long period of time By providing the looseness detection device and the predetermined communication terminal, it is possible to provide a monitoring system that can easily and inexpensively monitor the looseness of the screw fastening means at multiple points over a long period of time.
Moreover, according to 2nd invention of Claim 5-6, even if it is a case where the to-be-fixed member over several steps is fixed with a some screw fastening means, There is no need to remove or reassemble the screw fastening means, it can be installed with the current state preserved, it can be easily installed on the fixed member and the screw fastening means, and it is stably maintained, and it is structurally maintained. Is equipped with a specified communication terminal and a screw looseness detection device that can withstand outdoor use, has excellent environmental resistance, can detect screw looseness accurately over a long period of time, and can be manufactured at low cost. Accordingly, it is possible to provide a monitoring system that can easily monitor the looseness of the screw fastening means over a plurality of points over a long period of time at a low cost.

In addition, according to the third invention of the seventh to ninth aspects, a large accident can be caused by reliably detecting the detachment of the bolt as the male screw member as the screw fastening means and the nut as the female screw member. It can be prevented in advance, and it is not necessary to remove existing bolts and nuts or to perform additional machining to suit multi-point installation. With excellent resistance to the environment, stable detection over a long period of time, and a screw release detection device that can be manufactured and installed at low cost and a predetermined communication terminal, multiple screw fastening means can be removed. Thus, it is possible to provide a monitoring system that can easily and stably monitor at low cost over a long period of time.
According to the fourth aspect of the present invention, the bolt as a screw fastening means, the bolt with a sensor capable of reliably detecting the detachment of the bolt and the nut as well as the loosening of the nut and the predetermined communication. By using the terminal, it is possible to provide a monitoring system that can easily and inexpensively and stably monitor the loosening and detachment of the screw fastening means at multiple points over a long period of time.

Moreover, according to 5th invention of Claim 11-Claim 15, using the bolt with a sensor, a nut with a sensor, and a predetermined | prescribed communication terminal, the looseness or detachment | leave of a screw fastening means is detected reliably, Since it can be centrally managed wirelessly, it can prevent major accidents in advance, and can be easily installed so as to be suitable for multi-point installation, and can be manufactured or installed at low cost. Can be provided over a long period of time.
According to each of the above inventions, it is possible to simply, quickly and stably perform the installation work on the fixed member by the magnetic force adsorption means, and the bolts or nuts can be kept loose or detached for a long time. It is possible to provide a screw looseness or screw detachment monitoring system with excellent environmental resistance that can withstand outdoor use, and can be processed at extremely low costs, and can be processed at a very low cost. it can.

1 is a circuit block diagram showing the overall configuration of a screw looseness monitoring system according to a first embodiment of the present invention. It is a rear view which shows the external appearance structure of the screw loosening detection apparatus which concerns on the 2nd Embodiment of this invention. It is a center longitudinal cross-sectional view which shows the cross-sectional structure of the screw loosening detection apparatus shown in FIG. It is the bottom view which looked at the screw looseness detection apparatus shown in FIG. 2 from the bottom face. It is the perspective view of the state which looked at the screw looseness detection apparatus which concerns on the 2nd Embodiment of this invention from diagonally upward. It is sectional drawing which shows the structure of the reed switch which comprises a part of this invention, and the holder unit holding the cable etc. which derive | lead-out the output of the reed switch. It is sectional drawing which shows typically the fundamental structure of the cap magnet which is an example of the magnet which is a magnetic force attraction member which comprises a part of this invention. It is a rear view which shows the external appearance structure of the screw loosening detection apparatus which concerns on the 3rd Embodiment of this invention. It is a center longitudinal cross-sectional view which shows the cross-sectional structure of the screw loosening detection apparatus shown in FIG. It is the bottom view which looked at the screw looseness detection apparatus shown in FIG. 8 from the bottom face. It is the perspective view of the state which matched two notches each formed in the rotation member and main body member of the screw looseness detection apparatus which concerns on the 3rd Embodiment of this invention, and was seen from diagonally upward. It is sectional drawing which shows the cross-sectional structure of the screw detachment | leave detection apparatus which concerns on the 4th Embodiment of this invention. It is a rear view which shows the external appearance structure of the screw detachment | desorption detection apparatus shown in FIG. It is a fragmentary sectional view which fractures | ruptures and shows a part of screw detachment | desorption detection apparatus shown in FIG. It is sectional drawing which shows typically the fundamental structure of the cap magnet which is an example of the magnet which is a magnetic force attraction member which comprises a part of screw detachment | desorption detection apparatus shown in FIG. It is a perspective view for demonstrating the state just before setting the screw detachment | desorption detection apparatus shown in FIG. 12 with respect to the hexagon socket head bolt which is a screw fastening means. It is a perspective view which shows the state in which the screw detachment | desorption detection apparatus shown in FIG. 12 was installed in the screw fastening means which fastened the structure. It is a perspective view which shows the external appearance structure of the hexagon bolt with a sensor which concerns on the 5th Embodiment of this invention. It is a perspective view which shows the external appearance structure of the hexagon socket head bolt with a sensor which concerns on the 6th Embodiment of this invention. It is a perspective view which shows the external appearance structure of the hexagon nut with a sensor which concerns on the 7th Embodiment of this invention. It is the perspective view of the state which looked at the structure of the screw looseness or screw detachment | desorption detection device union which concerns on the 5th Embodiment of this invention from diagonally upward. It is sectional drawing which shows the structure of the holder unit holding the lead switch which comprises a part of screw looseness or screw detachment | desorption detection apparatus shown in FIG. 21, and the cable etc. which derive | lead-out the output of the lead switch. It is sectional drawing which shows typically the fundamental structure of the cap magnet which is an example of the magnet which is a magnetic attraction member which comprises a part of screw looseness or screw detachment | desorption detection apparatus shown in FIG. It is a perspective view for demonstrating the state just before attaching the screw loosening or screw detachment | desorption detection apparatus which concerns on 5th Embodiment of FIG. 21 to a to-be-fixed member with a hexagon bolt with a sensor. It is a perspective view which shows the state installed in the hexagon bolt with a sensor which fastened the structure the screw loosening or screw | thread removal detection apparatus of FIG. 21 which concerns on the 5th Embodiment of this invention.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the scope of claims, and are combinations of features described in the embodiments. Not all are essential to the solution of the invention.

[First Embodiment]
FIG. 1 is a configuration diagram showing the overall configuration of a screw looseness monitoring system according to a first embodiment of the present invention. In the screw looseness monitoring system according to the present invention, the fact that a screw or the like has been loosened can be transmitted to a remote place and notified in correspondence with each installation location.

In the figure, the screw looseness monitoring system according to the first embodiment includes one or more washer sensors 10 as screw looseness detection devices and a predetermined communication terminal 20. The washer sensor 10 includes a reed switch 1 that transmits a contact signal, a processing unit 2 that determines the state of the system, an oscillator 3 for the processing unit 2, a power supply unit 4 for the processing unit 2, and wireless communication that exchanges information with the processing unit 2. Part 5. The processing unit 2 includes a nonvolatile storage device 21, a central processing unit 22 (with a storage device 221), and a contact signal processing unit 23.
The oscillator 3 includes a clock oscillator 31 and a central processing unit oscillator 32. The power supply unit 4 includes a power switch 41, a lithium battery 42, an operation initialization function unit 43, and a constant voltage device 44. The wireless communication unit 5 includes a wireless communication modulation frequency oscillator 51, a communication processing device 52 (modulator / demodulator / transmission / reception signal amplifier), and a transmission / reception antenna 53.

As an example, the predetermined communication terminal 20 (here, a smartphone) includes a display device / input device 61, a central processing unit 62, a storage device 63, a communication processing device 64 (modulator / demodulator / transmission / reception signal amplifier), and A transmission / reception antenna 65 is provided.
Hereinafter, the function of each component of the screw loosening detection system shown in FIG. 1 will be described. The reed switch 1 is a unit that is a main part of the present invention. The reed switch 1 is a sensor that is incorporated in a screw installation portion, detects the fact that the screw has loosened, as a change in contact state, and outputs it as ON-OFF information. It shall be equipped with. In the present invention, a screw looseness detection device (described later) according to an embodiment of the present invention is applied as the reed switch 1.
In the processing unit 2, the device code or the like of the washer sensor 10 is stored in advance in the nonvolatile storage device 21. The central processing unit 22 having the storage device 221 receives the contact signal from the contact signal processing unit 23, organizes the result, and outputs the result to the wireless communication unit 5. In order to realize this processing, the contact signal processing unit 23 reads the contact signal from the reed switch 1 and sends the result to the central processing unit 22. Note that the storage device 221 temporarily records the contact state of the reed switch.
The clock oscillator 31 excites the clock oscillation signal and the central processing unit oscillator 32 generates the oscillation signal for the central processing unit 22 and sends them to the central processing unit 22 of the processing unit 2.

The power supply unit 4 supplies the power output of the lithium battery 42 that can withstand long-term use to the processing unit 2 via the constant voltage device 44 and the power switch 41. When the power is turned on, the operation initialization function unit 43 operates to initialize the circuit inside the processing unit 2.
The wireless communication unit 5 transmits the signal to the transmission / reception antenna 53 after the communication processing device 52 performs processing such as modulation / demodulation / amplification on the transmission signal received from the central processing unit 22 of the processing unit 2 at the time of transmission. To do. The transmission / reception antenna 53 transmits the transmission signal subjected to the above processing in the air. Further, at the time of reception, the reception signal received by the transmission / reception antenna 53 is received from the transmission / reception antenna 53, and the received signal is subjected to processing such as modulation / demodulation / amplification. Send it out.
Next, the communication terminal 20 (here referred to as “smart phone”) will be described. The display device / input device 61 displays necessary information on the display unit, and inputs a signal for touching (touching) the display unit as an input signal. The central processing unit 62 receives and processes signals from other devices in the communication terminal 20 and sends the processed signals to the other devices. The storage device 63 stores device codes to be connected in advance. At the time of transmission, the communication processing device 64 performs processing such as modulation / demodulation / amplification on the transmission signal received from the central processing unit 62, and then sends it to the transmission / reception antenna 65.

The transmission / reception antenna 65 transmits the transmission signal subjected to the above processing in the air. At the time of reception, the reception signal received by the transmission / reception antenna 65 is received from the transmission / reception antenna, and the received signal is subjected to processing such as modulation / demodulation / amplification, and then sent to the central processing unit 62.
Hereinafter, an operation according to an aspect of the screw looseness monitoring system according to the first embodiment of the present invention will be described.
First, the operator performs a connection request operation with the washer sensor 10 via the display device / input device 61 of the communication terminal 20 (specifically, it may be a smartphone).
When the connection request operation described above is performed, the central processing unit 62 of the communication terminal 20 passes through the communication processing unit 64 and the transmission / reception antenna 65 to a plurality of washer sensors (herein referred to as the washer sensor 10) around itself. On the other hand, a connection request signal with a device that issues a connection request is transmitted. At this time, the central processing unit 62 adds the code of the device desired to be connected (hereinafter referred to as “device code”) stored in the storage device 63 to the connection request signal. .
This connection request signal is received via the transmission / reception antenna 53 of the washer sensor (that is, the washer sensor 10) around the own device, is transmitted to the communication processing device 52 of the wireless communication unit 5, and the communication processing device 52 performs signal amplification and Demodulation processing is performed. The resulting output is sent to the central processing unit 22 of the processing unit 2.

The central processing unit 22 verifies whether or not the device code of the received connection request signal indicates the device of the washer sensor 10, and this device code and the code stored in the nonvolatile storage device 21. We carry out by collating with. As a result of this collation, when it is determined that the device code of the received connection request signal indicates the device of the washer sensor 10, the central processing unit 22 performs modulation and modulation of the connection permission signal in the communication processing device 52. After amplification, the result is transmitted to the caller communication terminal 20 via the transmission / reception antenna 53.
This connection permission signal is received by the transmission / reception antenna 65 of the communication terminal 20 and sent to the central processing unit 62 via the communication processing device 64. When the central processing unit 62 detects that the connection permission signal has been received, the central processing unit 62 displays on the display unit of the display device / input device 61 that the washer sensor 10 requested by itself is connected. As a result, a communication path between the communication terminal 20 and the washer sensor requested by the own device is established, and communication is enabled.
In the washer sensor 10, after transmitting the connection permission signal, the contact signal processing unit 23 monitors the contact state of the reed switch 1 at regular time intervals. Information indicating the monitoring result is sent to the central processing unit 22 and temporarily stored in the storage device 221 by the central processing unit 22.

The central processing unit 22 of the washer sensor 10 sends the contact information of the reed switch 1 (screw looseness detection device) stored in the storage device 221 to the communication processing device 52, and the communication processing device 52 Information is transmitted to the caller communication terminal 20 via the transmission / reception antenna 53.
The caller communication terminal 20 receives the transmitted contact information of the reed switch 1 via the transmission / reception antenna 65 and sends it to the central processing unit 62 via the communication processor 64. The central processing unit 62 processes the contact information and then displays it on the display unit of the display / input device 61.
The above series of operations is repeated unless a communication canceling operation is performed via the input unit of the display device / input device 61 of the communication terminal 20. When a communication cancellation operation is performed via the input unit of the display device / input device 61 of the communication terminal 20, a communication interruption signal is sent from the central processing unit 62 to the communication processing device 64, and the transmission / reception antenna is transmitted from the communication processing device 64. 65 is transmitted.

The communication cutoff signal is received via the transmission / reception antenna 53 of the washer sensor 10, and the received communication cutoff signal is sent to the central processing unit 22 via the communication processing device 52. When the central processing unit 22 confirms the communication cut-off signal, the central processing unit 22 stops the monitoring operation of the contact signal processing unit 23, and thereafter shifts to a standby state waiting for a new connection request from the communication terminal 20.
Hereinafter, an operation according to an aspect of the screw looseness monitoring system according to the first embodiment of the present invention will be described.
In this aspect, each of the washer sensors 10 transmits the fact of the detection to the communication terminal 20 via the wireless communication unit 5 together with the code stored in advance when the screw loose state is detected by the reed switch 1. To do. The operation of the communication terminal 20 that has received this may be the same as that described above.
Hereinafter, the screw looseness detection apparatus according to the second embodiment of the present invention will be described in detail. In the state where the screw looseness detection device according to the second embodiment is incorporated in the washer sensor 1 of FIG. 1, the screw looseness monitoring system according to the first embodiment is obtained.

2 to 7 relate to a screw looseness detection device according to a second embodiment of the present invention. Among these, FIG. 2 is a rear view showing an external configuration of a screw looseness detection device according to a second embodiment of the present invention, and FIG. 3 is a central longitudinal section showing a cross-sectional configuration of the screw looseness detection device of FIG. FIG. 4 is a bottom view showing an external configuration of the screw looseness detecting device of FIG.
FIG. 5 is a perspective view of the screw looseness detection device according to the second embodiment of the present invention as viewed obliquely from above.
FIG. 6 is a cross-sectional view showing a configuration of a reed switch that constitutes a part of the screw looseness detection device of FIG. 2 and a holder unit that holds a cable or the like that derives the output of the reed switch.
FIG. 7 is a cross-sectional view schematically showing a principle configuration of a cap magnet that is an example of a magnet that is a magnetic force adsorbing member that constitutes a part of the screw looseness detection device of FIG. 2.
2 to 7, the member denoted by reference numeral 101 is a main body member, and the appearance is substantially disk-shaped, the bottom (lower part in FIG. 2), and the arcuate part is cut away. A holder unit, which will be described later, is coupled to the shaped cutting portion 101a. A large-diameter slot 101b is formed in the central portion of the main body member 101. The large-diameter slot 101b extends from the back side to the front side and fits a rotation member described later. Through-holes 101c are formed.

Further, in the vicinity of the outer periphery of the main body member 101, female screw holes 101d and recessed portions 101e are formed at equal intervals (120-degree angle intervals) for attaching magnets as magnetic attraction members described later.
A female screw hole 101f that penetrates from the back side to the front side is also formed.
Further, a recessed groove 101g having a diameter slightly larger than that of the large diameter hole 101b is formed on the back side of the main body member 101, and a retaining ring described later is fitted into the recessed groove 101g. A member denoted by reference numeral 102 is a rotating member that fits into the slot 101b of the main body member 101 and is rotatably held.
A hexagonal hole 102a penetrating from the back side to the front side is formed at the center of the rotating member 102. The hexagonal hole 102a is a male screw member or a female screw member as a screw fastening means described later, It engages with the head of a hexagon bolt or a hexagon nut and rotates together with the hexagon bolt and hexagon nut.
As shown in FIG. 3, the rotating member 102 is fitted up to the bottom of the slot 101b of the main body member 101, and a ring-shaped retaining ring 103 for retaining is pressed from the back side (left side in FIG. 3). Alternatively, it is assembled so as to be lightly rotatable in the slot 101b by fixing with an adhesive or the like in the inserted state.

A magnet 104 is embedded in a recessed portion formed in the vicinity of the periphery of the rotating member 102 and is fixed by an adhesive.
On the back side (the left side in FIG. 3) of the main body member 101, magnets as three magnetic force adsorbing members 105 are stopped so as to fit into the three recessed portions 101e formed at equal angular intervals of 120 °. The screw 106 is fixed by screwing it into the female screw hole 101d.
Further, a butterfly bolt 107 as a detaching member that is screwed into a female screw hole 101f that penetrates from the front side to the back side is provided in the vicinity of the magnetic force adsorbing member 105 of the main body member 101. The butterfly bolt 107 is difficult to be removed easily because the screw looseness detection device is adsorbed and held by the strong magnetic force adsorbing member 105. Therefore, when removing, the butterfly bolt 107 is turned with fingers to separate one magnetic force adsorbing member 105 from a structure as a fixed member (not shown), and then the main body member 101 is tilted obliquely. Thus, it can remove easily by pulling apart the magnet as the other magnetic force attraction member 105.
Next, a holder unit 1013 for holding a cable 1015 for leading the output of a reed switch 1014 as a magnetically sensitive switch to the outside will be described with reference to FIGS.

As shown in FIGS. 5 and 6, the holder unit 1013 has two through holes 1016 a formed in the holder main body 1016, and two mounting screws 1017 are provided in the female screw holes cut in the main body member 101. The holder main body 1016 is attached to the main body member 101 by screwing. The holder body 1016 has a substrate 1018 and a reed switch 1014 mounted on the substrate 1018, and a switch cover 1019 is provided via an O-ring so as to surround the reed switch 1014.
Further, the holder body 1016 is filled and solidified with a molding agent 1022 in a state where a cable 1015 for deriving a signal of the reed switch 1014 is electrically connected to a circuit component of the substrate 1018, and is waterproofed. On the proximal end side of 1015, waterproofing between the holder member 1016 b and the cable 1015 is achieved by a heat-shrinkable tube 1023.
Here, as an example of the magnetic force adsorbing member used in the screw looseness detection device according to the second embodiment of the present invention, a cross-sectional view of a cap magnet shown in FIG. 7 will be described.
In FIG. 7, the cap magnet 108 is formed by surrounding three sides of the magnet body 109 with iron 1010, and magnetic lines of force concentrate between the magnet surface of the magnet body 109 facing the upper surface and the iron 1010 on the outer periphery. When brought into contact with (iron material), the attractive force is 3 to 4 times (in the same kind and the same size) than in the case of a magnet alone.

Therefore, by using the cap magnet 108, the screw looseness detection device can be firmly held on the structure made of iron material and stably over a long period of time.
Next, the screw looseness detection device having the above-described configuration is used in a place where a member to be fixed, for example, a structure such as an iron bridge is fastened by screw fastening means such as a bolt or a nut. The hexagonal hole 102a (FIG. 5) of the rotating member 102 (FIG. 5) is engaged (fitted) with, for example, a bolt head (screw fastening means).
Next, the index member 101b (FIG. 5) displayed on the main body member 101 side (FIG. 2) is aligned with the index 102b (FIG. 5) displayed on the rotating member 102 side, and the main body member 101 is attached to the magnetic force adsorbing member 105. Fix (Fig. 2) and finish installation.
After the installation, the contact state (initial state) of the reed switch 1014 is, for example, ON. If the screw fastening means such as bolts and nuts are loosened in this initial state, the magnetic field environment of the reed switch 1014 as a magnetically sensitive switch changes, and the contact state of the reed switch 1014 is turned off. Of course, the contact state (initial state) of the reed switch 1014 and the subsequent change may be reversed.
Note that a plurality of rotating members are prepared so as to correspond to the shape, size, and configuration of the screw fastening means.

For example, it is desirable to produce a rotating member provided with a hexagonal column-shaped engaging protrusion at the center so that the screw fastening means can be applied to a hexagon socket head cap screw. In addition, when the screw fastening means is a quadrangular bolt or nut, an engagement hole having a quadrangular shape may be provided. In addition, the main body member 101 has a disk shape in the above embodiment, but may be changed to a narrow square plate shape.
As explained in detail above, according to the second embodiment, there is no need to remove existing fixed members and screw fastening means (bolts and nuts) or perform additional processing, Since installation is possible in a maintained state, no installation work is required, and the installation work can be performed simply, quickly and stably on the fixed member by the magnetic force adsorption means 105, and the screw fastening means is loosened. The condition can be detected stably over a long period of time, processing costs and installation costs can be reduced at a very low cost, and no structural or maintenance is required. By reliably detecting the loosening of the screw fastening means in the rotational direction, the effect of preventing a major accident is enormous.
The present embodiment is not limited to the second embodiment of the present invention described above and shown in the drawings, and various modifications can be made without departing from the spirit of the present embodiment.

For example, although an embodiment in which three magnets are used as the magnetic force adsorbing member and arranged on the back side of the main body member has been shown, the magnet has a single annular shape (that is, a ring with a constant width). Alternatively, this annular magnet may be disposed on the back side of the main body member so as to surround (enclose) the outer side of the rotating member.
Further, the magnetic force adsorbing member may be two arc-shaped or rectangular magnets, and the back side of the main body member surrounds the two arc-shaped or rectangular magnets outside the rotating member. May be arranged symmetrically (at intervals of 180 °).
Further, although the example of the butterfly bolt that is screwed into the female screw hole penetrating from the front surface side to the back surface side of the main body member is shown, the detaching member may be a normal bolt or a bolt such as a suspension bolt. May be.
Further, in the above description, the engaging portion has been shown so that the head portion of the bolt can be engaged with a hexagonal shape and a quadrangular shape. Can of course also be applied.
Moreover, although the engaging part was shown about what was formed so that it could engage with the said hexagon socket of the hexagon socket head bolt, it may engage with a triangle socket head bolt, and the important point is If it is a bolt with a polygonal hole, the shape corresponding to it may be used.

The screw looseness detecting device according to the second embodiment configured as described above is combined with the wireless communication means shown in FIG. 1, and further provided as a second wireless communication means spaced apart from the screw looseness detecting device. It is possible to construct the screw looseness monitoring system according to the first embodiment.
That is, it comprises a washer sensor 10 as one or more screw looseness detection devices, and a predetermined communication terminal 20 provided separately from each washer sensor 10,
Each of the washer sensors is
A reed switch 1 as a screw loosening detection means for detecting a looseness state of a screw fastening means comprising a male screw member and a female screw member for fixing a fixed member;
A wireless communication unit 5 as first wireless communication means for wirelessly transmitting a result of looseness detection of the screw fastening means by the reed switch 1 to the predetermined communication terminal 20;
With
The predetermined communication terminal 20 is
A communication processing device 64 as a second wireless communication means for receiving the transmission, a transmission / reception antenna 65, and
A display device / input device 61 as display means for displaying a looseness state detection result of the screw fastening means received via the transmission / reception antenna 65;
It is possible to construct a screw looseness monitoring system with

In addition, the predetermined communication terminal 20 further includes an information input device 61 for the specific washer sensor 10 that needs to know the looseness detection result of the screw fastening means among the one or more washer sensors 10. A connection request signal for requesting connection is transmitted through the second transmitting / receiving antenna 65 together with the code of the specific washer sensor 10 input through the input device 61;
Each of the one or more washer sensors 10 that has received the connection request signal via the first wireless communication unit 5 has the code of the specific washer sensor 10 included in the connection request signal in advance. When the stored code matches the stored code, the looseness detection result of the screw fastening means by the washer sensor 10 is wirelessly transmitted to the predetermined communication terminal 20 via the first wireless communication unit 5. can do.
Each of the one or more washer sensors 10 is:
When the loose state of the screw fastening means is detected by the reed switch 1 by the washer sensor 10, information indicating the fact of the detection is stored via the first wireless communication unit 5 together with a code stored in advance by the self switch. You may make it comprise so that it may transmit to the said predetermined | prescribed communication terminal 20. FIG.

The one or more screw looseness detection devices (washer sensors 10) are:
A rotating member 102 having an engaging portion (hexagonal hole 102a) for engaging with the male screw member or the female screw member, and a magnet 204 disposed in a part near the periphery;
The rotating member 102 is rotatably supported, and a magnetic sensitive switch (reed switch 1014) is disposed in the vicinity of the rotating range of the magnet 204, and the fixed member is supported by a magnetic force adsorbing member 105. The main body member 101 to be adsorbed and fixed,
With the fixed member fastened and fixed by the screw fastening means, the engaging portion (engagement hole 102a) is engaged with the male screw member or the female screw member, and the magnetically sensitive switch (reed switch 1014) and the magnet In the state where the main body member 101 is disposed and fixed to the fixed member via the magnetic force adsorbing member 105 at an initial position facing the head 1204, the screw fastening means is loosened and the rotating member 102 is rotated, The magnet 204 detects the looseness of the screw by switching the magnetic sensitive switch (reed switch 1014) by rotating a predetermined angle from the initial position with respect to the magnetic sensitive switch (reed switch 1014). The screw looseness monitoring system may be configured as follows.

[Second Embodiment]
In the second embodiment, even if a plurality of fixed members are fixed by a plurality of screw fastening means, the existing fixed member and the screw fastening means are removed or reassembled. The present invention realizes a screw loosening detection device that can be installed in a state where the current state is saved without necessity.
8 to 11 relate to a screw looseness detection device according to a third embodiment of the present invention.
8 is a rear view showing the external configuration of the screw looseness detection device according to the third embodiment of the present invention, and FIG. 9 is a central longitudinal section showing the cross-sectional configuration of the screw looseness detection device of FIG. FIG. 10 is a bottom view showing an external configuration of the screw looseness detecting device of FIG.
FIG. 11 is a perspective view of the screw looseness detection device according to the third embodiment of the present invention as seen obliquely from above, with the two notches formed in the rotating member and the main body member matched. .
8 to 11, a member denoted by reference numeral 201 is a main body member, and its external shape is substantially a disk shape except for a notch described later, and a bottom portion (lower portion in FIG. 8) is an arc-shaped portion. The holder unit 2013 to be described later is coupled to the planar cutting portion 201a. A large-diameter groove 201b (FIG. 9) is formed in the central portion of the main body member 201. A through-hole 201c (FIG. 9) having a smaller diameter than the slot 201b serving as a hollow portion is formed.

Further, in the vicinity of the outer periphery of the main body member 201, female screw holes 201d and recessed portions 201e for attaching magnets as a magnetic force attracting member 205 described later are formed at equal intervals (120 degree angular intervals). As shown in FIG. 8, FIG. 11, etc., the main body member 201 is formed with a second notch 201j having a predetermined width reaching the inner space from the outer periphery.
Moreover, the internal thread hole 201f penetrated from the back side to the front side is formed (refer FIG. 8).
Further, as shown in FIG. 9, a recessed groove 201g (FIG. 9) slightly larger in diameter than the large diameter hole 201b is formed on the back side of the main body member 201. A retaining ring 203 (FIG. 8) having a notch with a predetermined width is fitted.
A member denoted by reference numeral 202 (FIG. 8) is a rotating member that fits into a slot 201b as an inner space of the main body member 201 and is rotatably held.
A screw member engagement hole 202a (FIG. 9) as an engagement portion that engages with a hexagonal screw member that penetrates from the back side to the front side is formed at the center of the rotating member 202. The screw member engagement hole 202a is engaged with a male screw member or a female screw member as a screw fastening means described later, that is, a head or a hexagon nut of a hexagon bolt, and rotates together with the hexagon bolt or the hexagon nut. .

As shown in FIG. 8, the rotating member 202 is inserted to the bottom of the slot 201b of the main body member 201 and press-fits a ring-shaped retaining ring 203 having a notch 201j from the back side (left side in FIG. 9). Alternatively, by being fixed with an adhesive or the like in the inserted state, it is assembled so as to be lightly rotatable in the slot 201b.
Thus, since the retaining ring 203 after assembly is integrated with the main body member 1, the notch 201 j of the retaining ring 203 is treated as the same as the notch 3201 j of the main body member 201. A magnetic force attracting member 205 (magnet) is embedded in a recessed portion 201e formed in the vicinity of the periphery of the rotating member 202, and is fixed by an adhesive.
On the back side (the left side in FIG. 9) of the main body member 201, three magnetic force adsorbing members 205 (magnets) are stopped so as to fit into the three recessed portions 201e formed at equal angular intervals of 120 °. The screw 206 is fixed by screwing into the female screw hole 201d.
Also, a butterfly bolt 207 (FIG. 9) is provided near the magnetic force adsorbing member 205 of the main body member 201 as a detaching member that is screwed into a female screw hole 201f that penetrates from the front side to the back side. The butterfly bolt 207 is difficult to remove easily because the present screw looseness detection device is adsorbed and held by a strong magnetic force adsorbing member 205.

Therefore, when removing, turn the butterfly bolt 207 with fingers to separate one magnetic force adsorbing member 205 from the structure as a fixed member, and then tilt the main body member 201 in an oblique direction. It can be easily removed by pulling it away from the magnetic adsorption member 205 (magnet).
The rotating member 202 is also formed with a first notch 202d (FIG. 8) having a “predetermined width” that reaches the screw member engagement hole 202a in the inner space from the outer periphery. Here, the “predetermined width” of the first notch 202d and the second notch 201j is a screw member engaging hole (engagement) by inserting the bolt as a male screw member and a nut as the female screw member from the lateral direction. The joint part) is set to a dimension that can be engaged.
Next, a reed switch 2014 (FIG. 9) as a magnetically sensitive switch and a holder unit 2013 for holding a cable 2015 for leading the output of the reed switch 2014 to the outside will be described with reference to FIGS.
In the holder unit 2013, two through holes (not shown) are formed in the holder main body 2016 (FIG. 9), and two holes are formed in the female screw hole formed in the cutting portion 201 a (FIG. 8) of the main body member 201. The holder main body 2016 is attached to the main body member 201 by inserting the mounting screws 2017 (FIGS. 10 and 11) through the through holes and screwing them in.

The holder main body 2016 has a board 2018 (FIG. 9) and a reed switch 2014 (FIG. 9) mounted on the board 2018, and a switch cover (not shown) and an O-ring so as to surround the reed switch 2014. (Not shown) is provided.
For this reason, two mounting screws 2017 (FIG. 11) are inserted through the through-holes with the O-ring interposed between the holder main body 2016 and the cutting portion 201 a of the main body member 201, and cutting is performed. By screwing into the two female screw holes of the portion 201a, the holder main body 2016 can be water-tightly coupled to the main body member 201, and electrical components such as the reed switch 2014 and the substrate 2018 are protected from moisture, and therefore It can also be used outdoors.
As described above in detail, according to the third embodiment, there is no need to remove existing fixed members and screw fastening means (bolts and nuts) or to perform additional processing. Since installation is possible in a maintained state, no installation work is required, and the installation work can be performed simply, quickly and stably by the magnetic force adsorption means 205 on the fixed member, and the screw fastening means can be loosened. It can be detected stably over a long period of time, processing costs and installation costs can be extremely low, and it is structurally maintenance-free and has excellent environmental resistance to withstand outdoor use. Screws such as bolts and nuts By reliably detecting and monitoring the loosening of the fastening means in the rotational direction, the effect of preventing a major accident is enormous.

In particular, according to the third embodiment, even when the engagement hole 202a of the rotating member 202 cannot be inserted from the axial direction of the screw fastening means, the lateral direction perpendicular to the screw fastening means can be used. However, the screw member engagement hole 202a can be inserted through the first and second cutouts, so that the installation range can be expanded and the installation can be performed at low cost.
This embodiment is not limited to the embodiment described above and shown in the drawings, and as shown as a modification of the second embodiment described above without departing from the scope of the present embodiment. Various modifications can be implemented.
Moreover, as the shape of the first notch 202d and the second notch 201j, a parallel groove is shown, but the part from the outer periphery to the screw member engagement hole 202a is wide on the outer periphery side, and inside the inner part. You may form in a taper shape so that a width | variety becomes narrow as it progresses. By comprising in this way, the advantage that it becomes easy to insert the looseness detection apparatus of a screw from the side is acquired.

[Fourth Embodiment]
In the fourth embodiment, a large accident can be prevented in advance by reliably detecting the detachment of the bolt as the male screw member as the screw fastening means and the nut as the female screw member. There is no need to remove existing bolts and nuts or perform additional machining to fit, screw installation that can be easily installed, can be detected stably over a long period of time, and can be manufactured and installed at low cost. A detectable screw detachment detection device is realized.
12 to 17 relate to a screw detachment detecting device according to a fourth embodiment of the present invention.
Among these, FIG. 12 is a cross-sectional view showing a cross-sectional configuration of a screw detachment detecting device according to a fourth embodiment of the present invention, and FIG. 13 is a rear view showing an external configuration of the screw detachment detecting device of FIG. FIG. 14 is a partial cross-sectional view showing a part of the screw detachment detecting device of FIG.
FIG. 15 is a cross-sectional view schematically showing a principle configuration of a cap magnet that is an example of a magnet that is a magnetic force adsorbing member that constitutes a part of the screw detachment detecting device of FIG.
FIG. 16 shows a state immediately before the screw detachment detecting device according to the present invention is engaged with a hexagon bolt that is a screw fastening means in order to detect the state fastened to the structure as a fixed member by the screw fastening means. It is a perspective view for demonstrating.

FIG. 17 is a perspective view showing a state in which the screw detachment detecting device shown in FIG. 12 is installed with respect to the screw fastening means that fastens the structure.
12 to 17, S is a screw detachment detecting device according to the fourth embodiment of the present invention, and its specific configuration will be described below.
A member denoted by reference numeral 301 is a main body member, and has an outer appearance of a box shape, a rectangular shape that is almost square when viewed from the front, and four corners are chamfered. At the end of the main body member 301 (the upper end in FIG. 12), a concave sensor member storage portion 301a into which the sensor member 302 is fitted and stored is cut, and the sensor member 302 is stored and sealed in a watertight manner. Stopped. A hollow portion 301b is formed at the center of the main body member 301, such as a metal film resistor 303, switch terminals 302c, 302c, 302c, cable core wires 306a, 306a, and a wiring 302d that electrically connects them. A circuit element is accommodated.
The main body member 301 has two set screw holes 301e penetrating from the front side to the back side.
A magnetic force adsorbing member 304 shown in FIGS. 13 to 14 and the like is provided on the back surface side of the main body member 301, and set screws 305 and 305 are inserted from the set screw holes 301e and 301e side of the main body member 301 so as to reduce the magnetic force. The main body member 301 is connected and fixed by being screwed into a screw hole (female screw hole) of the adsorption member 304.

The sensor member 302 is movable (variable) between the protruding position and the pushing position, and the contact 302a is spring-biased to the protruding position, and although not shown in the drawing, the contact 302a is positioned at the protruding position. When it is displaced to the pushing position, it has a change-over switch 302b for switching a circuit, which will be described later, and a switch terminal 302c of this change-over switch 302b, and a metal film resistor 303, a cable core wire 306a, and wiring for connecting these circuit elements 302d, etc. are attached.
The changeover switch 302b is not limited to an analog switch in which the movable piece alternately switches between the two contact points, and may be a digital switch having a similar function.
The sensor member 302 itself has a waterproof structure and has heat resistance, cold resistance, and moisture resistance. In addition, the main body member 301 is stored and installed with a waterproof measure. Therefore, it has excellent environmental resistance without choosing an installation location.
The output signal of the sensor member 302 is transmitted through the wiring 302d connected to the switch terminal 302c, the metal film resistor 303, etc., and the core wire 306a inserted through the cable insertion hole 301c of the main body member 301 into these wirings 302d. Connected and derived from cable 306.

The cable 306 is inserted into a cable holding portion 301d projecting from the main body member 301, and its base end is subjected to a desired waterproofing treatment (for example, a confidential terminal, an O-ring, a molding agent, etc.) A heat-shrinkable tube 307 is placed over the outer periphery of the cable holding member 301d and the vicinity of the proximal end of the cable 306, and is in close contact with each other to prevent water from entering from the outside to the inside. As shown in FIG. 14, the screw detachment detecting device S includes a main body member 301 as a main part, a sensor member 302, a magnetic force adsorbing member 304 attached to the main body member 301 to a set screw 305, a cable 306, a heat-shrinkable tube 307, and the like. It is assembled with.
Here, an example of the magnetic force attracting member used in the screw detachment detecting device S according to the fourth embodiment of the present invention will be described with reference to a sectional view of the cap magnet 309 shown in FIG.
In FIG. 15, the cap magnet 309 is as described above, and the magnet body 3010 is surrounded by the iron 3011 between the magnet surface of the magnet body 3010 facing the upper surface and the iron 3011 on the outer periphery. Since the lines of magnetic force concentrate, when the magnet is brought into contact with the yoke (iron material), the attractive force becomes 3 to 4 times (in the same kind and the same size) as compared with the case of the magnet alone.
Therefore, by using this cap magnet 309, the screw detachment detecting device S can be firmly held on a structure made of iron material and stably over a long period of time.

Next, the screw detachment detecting device S having the above-described configuration is subjected to screw detachment at a site where the fixed member 3013, for example, a structure such as an iron bridge, is fastened by screw fastening means 3012 such as a bolt or a nut. FIG. 16 shows a state immediately before the contact 302a of the sensor member 302 of the detection device S is installed on the head of the screw fastening means 3012, for example, a hexagon socket head bolt. From the state shown in FIG. 16, the state shown in FIG. Finish the installation.
The fourth embodiment is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.
In the fourth embodiment, the nuts and bolts as the screw fastening means are separated from the fixed member by detecting the displacement of the contact, but the bolts and the like are completely removed. Needless to say, the detection can be performed even when the bolt or the like is slightly separated from the fixed member.
Further, the detection of the direction of separation can detect not only the case of falling in the direction of gravity but also the separation in the lateral direction.

[Fifth to seventh embodiments]
In these fifth to seventh embodiments, it is possible to realize a bolt with a sensor and a nut with a sensor that can reliably detect the detachment of the bolt or nut, not just the looseness of the bolt or nut as a screw fastening means. it can. Further, if the sensor-equipped bolt or the sensor-equipped nut is applied as the washer sensor 10 as shown in FIG. 1, the screw fastening means can be reliably monitored for looseness or detachment and wirelessly transmitted to a predetermined communication terminal 20. Therefore, it is possible to prevent major accidents in advance, and it can be easily installed so as to be suitable for multi-point installation, can be detected stably over a long period of time, and can be manufactured and installed at low cost. It is possible to realize a screw loosening or screw removal monitoring system capable of monitoring a screw loosening that can detect the removal or a state of screw removal.
Hereinafter, with reference to the drawings based on the fifth to seventh embodiments of the present invention, a bolt with a sensor, a nut with a sensor, a screw looseness or screw detachment detecting device and a screw loosening or screw detachment detecting device according to the present invention will be described. The provided screw loosening or screw removal monitoring system will be described in detail.
18 and 19 are perspective views showing the external configuration of the sensor-equipped bolt according to the fifth and sixth embodiments of the present invention.
FIG. 20 is a perspective view showing an external configuration of a hexagon nut with a sensor according to the seventh embodiment of the present invention.

FIG. 21 is a perspective view of a screw loosening or screw detachment detecting device according to the fifth embodiment of the present invention as viewed from obliquely above.
FIG. 22 is a cross-sectional view showing the configuration of a reed switch that constitutes a part of the screw looseness or screw detachment detecting device of FIGS. .
FIG. 23 is a cross-sectional view schematically showing a principle configuration of a cap magnet that is an example of a magnet that is a magnetic force adsorbing member constituting a part of the fifth to seventh embodiments.
FIG. 24 is a perspective view for explaining a state immediately before the screw loosening or screw detachment detecting device according to the fifth embodiment of the present invention is attached to the fixed member with the hexagon bolt with sensor.
FIG. 25 is a perspective view showing a state where a screw loosening or screw detachment detecting device according to a fifth embodiment of the present invention is installed on a hexagon bolt with a sensor to which a structure is fastened.
In FIG. 18, a hexagonal bolt 401 with a sensor in the fifth embodiment includes a head 401a having a hexagonal bolt shape, and a flange formed between the head 401a and a shaft 401b on which a male screw is formed. The shape portion 401c is a basic configuration. The hook-shaped portion 401c has a disk shape having a larger diameter than the outer shape of the head of the hexagon bolt, and is integrally formed so as to be concentrically overlapped with the shaft portion of the hexagon bolt, that is, the screw forming side.

A magnet 401e as a sensor is arranged inside an opening hole 401d formed near the outer peripheral surface of the bowl-shaped portion 401c, and cooperates with a separately prepared "magnetic sensitive switch" (described later). It functions to detect looseness or detachment (including dropping) of the hexagon bolt 401 with sensor.
An index 401f, such as a circle, is displayed (engraved) at a portion corresponding to the position directly above the position where the magnet 401e is disposed in the bowl-shaped portion 401c, and is displayed on the upper surface of a body member 404g described later. It serves as a mark when setting the initial position by matching with the index.
FIG. 19 shows an external configuration of a hexagon socket head bolt 402 with a sensor according to the sixth embodiment of the present invention. Therefore, the sensor-equipped hexagon bolt 401 according to the fifth embodiment is different in that the bolt head 402a has a cylindrical shape and a hexagonal hole is formed at the center of the upper end. The basic configuration is common.

  That is, the head portion 402a has a so-called hexagon socket bolt shape, but the opposite shaft portion 402b is formed with a male screw, and between the head portion 402a and the shaft portion 402b, the head portion 402a A cylindrical shape having a diameter larger than the diameter is formed, and a hook-shaped portion 402c formed integrally is formed so as to overlap concentrically with the shaft portion 402b.

Further, similarly to the hexagon bolt with sensor according to the fifth embodiment, a magnet 402e as a sensor is disposed inside an opening hole 402d formed near the outer peripheral surface of the hook-shaped portion 402c, which is separately prepared. The function of detecting looseness or detachment of the hexagon socket bolt 402 with sensor is achieved in cooperation with a magnetically sensitive switch (described later).
In addition, an index 402f is formed on the upper surface and the peripheral portion of the bowl-shaped portion 402c so that the positional relationship of the magnet 402c can be visually recognized from above.
FIG. 20 shows an external configuration of the sensor-equipped hex nut 3 according to the seventh embodiment. The difference from the sensor-equipped hex bolt according to the fifth embodiment is that the head 403a is a hex nut. The other configuration, that is, the hook-shaped portion 403c, the opening hole 403d, the magnet 403e, and the index 403f are the hook-shaped portion 401c, the opening hole 401d, the magnet 401e, and the index of the hexagon bolt with sensor 401 shown in FIG. Corresponding to 401f, the basic configuration is common.
21 to 23 show a configuration of a screw loosening or screw detachment detecting device 404 according to the fifth embodiment of the present invention.
In FIG. 21, a member denoted by reference numeral 401 is a hexagon bolt with a sensor according to the fifth embodiment described in FIG. 18, and a head portion 401a and a shaft portion 401b made of the hexagon bolt are shown.

21 to 23, the member denoted by reference numeral 404g is a main body member, and the appearance shape is substantially disk-shaped, and a part of the circular arc portion of the disk is cut, and a planar shape is obtained. A holder unit, which will be described later, is coupled to the cutting portion. A through-hole 404c extending from the back side to the front side is formed in the central portion of the main body member 404g to which the hook-like portion 401c of the hexagon bolt 401a with sensor described above is fitted.
Further, three female screw holes 404d for attaching magnets as magnetic attraction members to be described later are formed at equal intervals (120 degree angular intervals) in the vicinity of the outer periphery of the main body member 404g.
Also, a female screw hole 404f for screwing the butterfly bolt 407 penetrating from the back side to the front side is formed.
On the back side of the main body member 404g (bottom side in FIG. 21), three magnets as magnetic force adsorbing members are fastened so as to be screwed into three female screw holes 404d formed at equal angular intervals of 120 °. It is fixed by screws (not shown).

Also, a butterfly bolt 407 as a detaching member that is screwed into a female screw hole 404f that penetrates from the front side to the back side is provided in the vicinity of the magnetic force adsorption member of the main body member 404g. The butterfly bolt 407 is difficult to remove because the screw loosening or separation detecting device 404 is adsorbed and held by the strong magnetic force adsorbing member to iron as a fixed member. Rotate the butterfly bolt 407 with fingers to separate one of the magnetic force adsorbing members from the structure as the fixed member 4012 (see FIGS. 24 and 25), and then tilt the main body member 404g in an oblique direction. Then, it can be easily removed by pulling away the magnet as another magnetic attraction member from the structure.
Next, a reed switch 4014 as a magnetically sensitive switch and a holder unit 4013 for holding a cable 4015 for leading the output of the reed switch 4014 to the outside will be described with reference to FIGS.
The holder unit 4013 is configured as shown in FIGS. That is, two through holes 4016a and 4016a are formed in the holder main body 4016, and two mounting screws are inserted into a female screw hole (not shown) formed in a cutting portion (not shown) of the main body member 404g. The holder main body 4016 is attached to the main body member 404g by inserting 4017 through the through hole 4016a and screwing in.

In the holder main body 4016, a reed switch 4014 is mounted on the substrate 4018 and the substrate 4018, and a switch cover 4019 and an O-ring (not shown) are provided so as to surround the reed switch 4014.
For this reason, in the state where the O-ring is inserted between the holder main body 4016 and the cutting portion of the main body member 404g, the two mounting screws 4017 are inserted through the through holes 4016a, and the two cutting portions of the cutting portion are inserted. By screwing into the female screw hole, the holder main body 4016 can be watertightly coupled to the main body member 404g, and the electrical components such as the reed switch 4014 and the substrate 4018 are protected from moisture, and therefore can be used outdoors. It is said.
The holder body 4016 is filled with a molding agent 4022 and solidified as shown in FIG. 22 in a state where a cable 4015 for deriving a signal of the reed switch 4014 is electrically connected to a circuit component of the substrate 4018. The holder 4016 and the cable 4015 are waterproofed by a heat-shrinkable tube 4023 on the base end side of the cable 4015 that is waterproof.
Here, an example of the magnetic force adsorbing member used in the screw loosening or separation detecting device in the fifth to seventh embodiments according to the present invention will be described with reference to a cross-sectional view of the cap magnet shown in FIG.

In FIG. 23, the cap magnet 408 has three sides of the magnet body 409 surrounded by iron 4010, and magnetic lines of force concentrate between the magnet surface of the magnet body 409 facing the upper surface and the outer iron 4010. When brought into contact with (iron material), the attractive force is 3 to 4 times (in the same kind and the same size) than in the case of a magnet alone.
Therefore, by using the cap magnet 408, the screw loosening or detachment detecting device can be firmly held on a structure made of iron material and stably over a long period of time.
FIG. 24 shows a screw loosening or detachment detecting device 404 having the above-described configuration, and a fixed member 4012 such as a steel bridge or other flanges for connecting pipes to each other such as a bolt with a sensor or a nut with a sensor. At the site where the screw fastening means 4011 is fastened, the hook-like portion 401c of the hexagon bolt 401 with a sensor as the screw fastening means 4011 is fitted into the through hole 404c of the body member 404g of the screw loosening or detachment detecting device. The state immediately before attaching to the fixing member 4012 is shown.
Next, as shown in FIG. 25, the index member 404 g displayed on the main body member 404 g side is aligned with the index 401 f displayed on the upper surface side of the hook-shaped portion 401 c of the hexagon bolt 401 with sensor, so that the main body member 404 g is Fix by magnetic adsorption member and finish installation.

As described above in detail, according to the present invention, it is only necessary to replace the screw fastening means 4011 such as a sensor-equipped bolt or a sensor-equipped nut once, and it is not necessary to perform additional processing, and the current state is maintained. Since the installation work is simple, the installation work is simple, and the fixed member 4012 can be installed simply, quickly and stably by the above-mentioned magnetic force adsorption member. It is possible to detect the 403 loose state or detached state stably over a long period of time, and the processing cost and installation cost are extremely low, and the structure is maintenance-free and environmentally resistant to withstand outdoor use. Excellent, by detecting the looseness in the rotational direction of the screw fastening means such as bolts with sensors and nuts with sensors and the detachment in the axial direction reliably. Effect capable of preventing the natural is enormous.
The present invention is not limited to the fifth to seventh embodiments described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention.
The wireless communication means shown in FIG. 1 is combined with the screw looseness detection device, screw release detection device, or screw looseness or release detection device according to the third to seventh embodiments configured as described above, and further the screw. By providing the predetermined communication terminal 20 having the second wireless communication means provided apart from the looseness detection device, a screw looseness monitoring system can be constructed as in the case of the first embodiment. .

That is, the screw looseness detection device (FIGS. 8 to 11) according to the third embodiment, the screw detachment detection device (FIGS. 12 to 17) according to the fourth embodiment, and the fifth to seventh embodiments. A screw loosening or detachment detecting device (FIGS. 18 to 25) according to the embodiment,
Reed switches 1014 (see FIG. 1) that replace the washer sensor 10 in the screw looseness monitoring system shown in FIG. 1 and detect the loosened state or the detached state of the screw fastening means included in the third to seventh embodiments. 3) By replacing the reed switch 2014 (FIG. 9), the sensor member 302 (FIG. 14), and the reed switch 4014 (FIG. 22) with the reed switch 1 of FIG. 1, a screw looseness monitoring system, a screw detachment monitoring system, a screw It can be a loosening or screw removal system.
By configuring in this way, it is possible to eliminate equipment costs such as cable laying as in the case of wired communication, reduce installation costs and avoid safety such as disconnection of communication cables and ensure safety. It is possible to quickly grasp in real time the situation of screw loosening and screw removal.
Moreover, it can be easily installed on the member to be fixed and the screw fastening means and is stably held, and it is possible to accurately detect the loosened state of the screw and the detachment of the screw over a long period of time, and to monitor at a low cost.

1 Reed switch (screw looseness detection device according to the present invention)
2 Processing Unit 3 Oscillator 4 Power Supply Unit 5 Wireless Communication Unit 10 Washer Sensor (Screw Loosening Detection Device)
DESCRIPTION OF SYMBOLS 20 Communication terminal 23 Contact signal processing part 51 Wireless communication modulation frequency oscillator 61 Display / input device 62 Central processing unit 63,221 Storage device 52,64 Communication processing unit 53,65 Transmission / reception antenna 101,201,301,404g Member 101g, 201e, 201g Recessed part 101i, 201i, 401f, 404e Index 102, 102 ', 102 ", 202 Rotating member 102a Hexagonal hole 102c Hexagonal columnar engagement protrusion 103 Retaining ring 104, 204, 401e, 402e Magnet 105, 205, 304 Magnetic force adsorbing member 106, 206 Set screw 107, 207, 408 Butterfly bolt 108, 304a, 309 Cap magnet 1010, 3011, 4010 Iron 1013, 2013, 4013 Holder unit 1014, 2014, 4 14 Reed switch 1015, 2015, 306, 4015 Cable 1016, 2016, 4016 Holder body 1016b Holder member 1018, 2018, 4018 Substrate 1019, 4019 Switch cover 1022, 308, 4022 Molding agent 1023, 2023, 307, 4023 Heat shrinkable tube 201j Second notch 202d First notch 302 Sensor member 302a Contactor 302b Changeover switch 302c Switch terminal 302d Wiring 303 Resistance (metal film resistance) (Rc)
3010, 409 Magnet body 3012 Hexagon socket head cap screw (screw fastening means)
3013, 4012 (fixed member) structure 401 hexagon bolt with sensor 401a, 402a, 403a head 401b, 402b shaft 401c, 402c, 403c hook-shaped part 401d, 402d, 403d opening hole 402 hexagon bolt with sensor 403 with sensor Hexagon nut 404 Screw loosening or removal detecting device 407 Wing bolt 4011 Screw fastening means

Claims (15)

One or more screw looseness detection devices, and each screw looseness detection device comprises a predetermined communication terminal provided separately from each other,
Each of the screw looseness detection devices,
A screw looseness detecting means for detecting a looseness state of a screw fastening means comprising a male screw member and a female screw member for fixing the fixed member;
First wireless communication means for wirelessly transmitting a looseness state detection result of the screw fastening means by the screw looseness detection means to the predetermined communication terminal;
With
The predetermined communication terminal is:
Second wireless communication means for receiving the transmission;
Display means for displaying a looseness state detection result of the screw fastening means received via the second wireless communication means;
A screw looseness monitoring system characterized by comprising: The predetermined communication terminal further includes information input means, and among the one or more screw looseness detection devices, for a specific screw looseness detection device that needs to know the looseness detection result of the screw fastening means, A connection request signal for requesting connection is transmitted through the second wireless communication unit together with the code of the specific screw looseness detection device input through the input unit,
Each of the one or more screw looseness detection devices that have received the connection request signal via the first wireless communication means has the code of the specific screw looseness detection device included in the connection request signal as A wirelessly transmitted result of looseness detection of the screw fastening means by the screw looseness detection means to the predetermined communication terminal via the first wireless communication means when it matches the code stored in advance. The screw looseness monitoring system according to claim 1, wherein: Each of the one or more screw looseness detection devices includes:
When the looseness state is detected by the screw loosening detection means by the screw loosening detection means, the predetermined communication is performed via the first wireless communication means together with a code stored in advance as information indicating the fact of the detection. The screw looseness monitoring system according to claim 1, wherein the screw looseness monitoring system is transmitted to a terminal. The one or more screw looseness detecting devices are:
A rotating member having an engaging portion that engages with the male screw member or the female screw member, and a magnet disposed in a part near the periphery;
A body member that rotatably supports the rotating member and is provided with a magnetically sensitive switch in proximity to the rotating range of the magnet, and is attracted and fixed to the fixed member by a magnetic force attracting member; Consists of
The engagement member is engaged with the male screw member or the female screw member while the fixed member is fastened and fixed by the screw fastening means, and the main body member is moved at an initial position where the magnetically sensitive switch and the magnet face each other. In a state where the fixed member is disposed and fixed to the fixed member via the magnetic force adsorbing member, the screw fastening means is loosened and the rotating member is rotated, and the magnet is rotated at a predetermined angle from the initial position with respect to the magnetically sensitive switch. The screw looseness monitoring system according to any one of claims 1 to 3, wherein the looseness state of the screw is detected by rotating and the magnetically sensitive switch switching operation. The one or more screw looseness detecting devices are:
A rotating member having an inner engagement portion that engages with the male screw member or the female screw member, and a magnet disposed in a part near the periphery;
It has an inner space that rotatably supports the rotating member, and is provided with a magnetic sensitive switch close to the rotating range of the magnet, and is fixed to the fixed member by a magnetic force absorbing member. A body member to be made,
A first notch having a predetermined width reaching the engaging portion in the inner space from the outer periphery of the rotating member is formed, and a second notch having a predetermined width reaching the inner space from the outer periphery of the main body member is formed. And
In a state where the fixed member is fastened and fixed by the screw fastening means, the engaging portion is brought close to the screw fastening means from the lateral direction through the first and second notches, and the engaging portion is made the male screw member or the female screw. In a state where the main body member is disposed and fixed to the fixed member via the magnetic force adsorbing member at an initial position where the magnetic sensitive switch and the magnet are opposed to each other, the screw fastening means is loosened. The rotating member is rotated, and the magnet is rotated by a predetermined angle from the initial position with respect to the magnetic sensitive switch, and the magnetic sensitive switch is switched to detect a loose state of the screw. The screw looseness monitoring system according to any one of claims 1 to 3.   The first notch formed in the rotating member and the second notch formed in the main body member are arranged in the rotating member in a relative rotation range in which the first notch does not match at all. The screw looseness monitoring system according to claim 5, wherein the magnetic sensitive switch and the magnet are in an initial position facing each other. One or more screw detachment detecting devices for detecting the detachment of the screw fastening means including the male screw member and the female screw member for supporting the fixed member from the fixed member, and each screw detachment detecting detection device are provided apart from each other. With a predetermined notification terminal,
Each of the screw removal detection devices,
A sensor member having a contactor that is variable between a projecting position and a pushing position and is spring-biased on the projecting position side, and a changeover switch that switches a circuit between the projecting position and the pushing position; and A main body member for holding the member; and a magnetic force adsorbing member for adsorbing and fixing the main body member to the fixed member. The contactor is used as the screw fastening means in a state where the fixed member is supported by the screw fastening means. The main body member is fixed to the fixed member by the magnetic force adsorbing member in a state of being in contact and pushed from the protruding position to the pushing position, and when the screw fastening means is detached from the fixed member, the sensor When the contact of the member is detached from the screw fastening means and protrudes to the projecting position and the circuit of the sensor member is switched, the detached state of the screw fastening means is detected. And the screw separation detecting means for,
First wireless communication means for wirelessly transmitting a result of detection of the disengagement state of the screw fastening means by the screw disengagement detection means, to the predetermined communication terminal;
With
The predetermined communication terminal is:
Second wireless communication means for receiving the transmission;
Display means for displaying a looseness state detection result of the screw fastening means received via the second wireless communication means;
A screw detachment monitoring system characterized by comprising: The predetermined communication terminal further includes an information input means, and among the one or more screw disengagement detection devices, for a specific screw disengagement detection device that needs to know the disengagement state detection result of the screw fastening means, A connection request signal for requesting a connection is transmitted through the second communication unit together with the code of the specific screw detachment detecting device input through the input unit,
Each of the one or more screw disengagement detection devices that have received the connection request signal via the first communication means has the code of the specific screw disengagement detection device included in the connection request signal in advance. When the stored code coincides with the stored code, a result of detecting the disengagement state of the screw fastening means by the screw disengagement detecting means is wirelessly transmitted to the predetermined communication terminal via the first communication means. The screw detachment monitoring system according to claim 7.   Each of the one or more screw disengagement detection devices includes a code that self-stores information indicating the fact of the detection when the disengagement state is detected by the screw disengagement detection unit by the screw disengagement detection unit. The screw detachment monitoring system according to claim 7 or 8, wherein the transmission is transmitted to the predetermined communication terminal via a first communication unit. Each screw loosening or detachment detection device, and each screw loosening or detachment detection device comprises a predetermined communication terminal provided separately from each other,
The screw loosening or separation detecting device is
A screw fastening means comprising a bolt and a nut for fixing a member to be fixed, which is integrally formed so as to concentrically overlap a flange-like portion having a disk shape having a diameter larger than the outer shape of the bolt on the screw forming side of the bolt. A screw that detects the loosening or disengagement of the bolt in cooperation with a magnetically-sensitive switch that is prepared separately, with a magnet as a sensor disposed in the vicinity of the periphery of the bowl-shaped part. Or with a withdrawal detection means,
First wireless communication means for wirelessly transmitting to the predetermined communication terminal a result of detection of looseness or disengagement of the screw fastening means by the screw loosening or removal detection means;
With
The predetermined communication terminal is:
Second wireless communication means for receiving the transmission;
Display means for displaying a looseness or disengagement state detection result of the screw fastening means received via the second wireless communication means;
A screw loosening or disengagement monitoring system characterized by comprising: A screw loosening or detachment detecting device for a nut with a sensor for detecting looseness or detachment of a screw fastening means comprising a bolt and a nut for fixing the fixed member from the fixed member;
A predetermined communication terminal provided separately from each screw loosening or separation detecting device;
The screw loosening or separation detecting device is
A screw fastening means comprising a bolt and a nut for fixing a member to be fixed, wherein a hook-like portion having a disk shape with a diameter larger than the outer shape of the nut is integrally formed so as to be concentrically overlapped with the nut. A screw looseness or detachment detecting means for detecting a looseness or detachment of the nut in cooperation with a separately provided magnetic sensing switch, wherein a magnet as a sensor is disposed in the vicinity of the periphery of the bowl-shaped portion. When,
First wireless communication means for wirelessly transmitting to the predetermined communication terminal a result of detection of looseness or disengagement of the screw fastening means by the screw loosening or removal detection means;
With
The predetermined communication terminal is:
Second wireless communication means for receiving the transmission;
Display means for displaying a looseness or disengagement state detection result of the screw fastening means received via the second wireless communication means;
A screw loosening or disengagement monitoring system characterized by comprising: The predetermined communication terminal is:
In addition, a connection request signal for requesting connection to a specific screw disengagement detecting device that has information input means and needs to know a disengagement state detection result of the screw fastening device among the one or more screw disengagement detecting devices. Is transmitted via the second communication means together with the code of the specific screw detachment detecting device input via the input means,
Each of the one or more screw disengagement detection devices that have received the connection request signal via the first communication means has the code of the specific screw disengagement detection device included in the connection request signal in advance. When the stored code coincides with the stored code, a result of detecting the disengagement state of the screw fastening means by the screw disengagement detecting means is wirelessly transmitted to the predetermined communication terminal via the first communication means. The screw loosening or detachment monitoring system according to claim 10 or 11.   Each of the one or more screw disengagement detection devices includes a code that self-stores information indicating the fact of the detection when the disengagement state is detected by the screw disengagement detection unit by the screw disengagement detection unit. The screw looseness or detachment monitoring system according to claim 11 or 12, wherein the system is transmitted to the predetermined communication terminal via a first communication means. The screw loosening or screw detachment detecting device comprising the sensor-equipped bolt or the sensor-equipped nut,
In the state where the hook-like part is fitted in a through hole having an inner diameter slightly larger than the outer diameter of the hook-like part, a magnetically sensitive switch is provided close to the rotation range of the magnet, and the fixed It consists of a body member that is attracted to the member by a magnetic adsorption member,
The through hole is inserted into the hook-shaped part of the bolt with sensor or the nut with sensor in a state where the fixed member is fastened and fixed by the bolt with sensor or the nut with sensor, and the magnetically sensitive switch and the magnet In the state where the main body member is arranged and fixed to the fixed member via the magnetic force adsorbing member at an initial position opposite to each other, the bolt with sensor or the nut with sensor is loosened and the bowl-shaped portion rotates, Alternatively, the sensor-equipped bolt or the sensor-equipped nut is detached, the magnet is rotated by a predetermined angle from the initial position with respect to the magnetic sensitive switch, or a predetermined amount is removed and the magnetic sensitive switch is switched, The loose state of the screw or the detached state of the screw is detected. The screw loosening or screw detachment monitoring system according to item 1. The screw loosening or screw detachment detecting device comprising the sensor-equipped bolt or the sensor-equipped nut,
The magnet is arranged so as to be proximate to a rotation range of the magnet arranged in the bowl-shaped portion, and a magnetically sensitive switch sensitive to the magnet is arranged, and the fixed member has the above-mentioned It consists of a holder body member that is adsorbed by a magnetic adsorption member,
The holder body member is brought close to the bowl-shaped portion in a state where the fixed member is fastened and fixed by the bolt with sensor or the nut with sensor, and the holder is in an initial position where the magnetism sensitive switch and the magnet face each other. In a state where the main body member is arranged and fixed to the fixed member via the magnetic force adsorbing member, the bolt with sensor or the nut with sensor is loosened to rotate the hook-shaped part, or the hook-shaped part is detached. The magnet is rotated by a predetermined angle from the initial position with respect to the magnetic sensitive switch, or is removed by a predetermined amount, and the magnetic sensitive switch is switched to detect the looseness of the screw or the detached state of the screw. The screw loosening or screw detachment monitoring system according to any one of claims 10 to 14.

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