JP7617773B2 - Flange fastening support system, method, program and device thereof - Google Patents

Description

The present disclosure relates to, for example, a support technology for supporting flange fastening in a pipeline system.

The tightening torque and bolt axial force values applied to the flanges by the bolts are traditionally used for tightening gaskets. The tightening torque and bolt axial force values are tightening information related to the bolts that tighten the flanges.
Regarding the tightening of this gasket, a system is known that uses tightening surface pressure corresponding to the type of gasket and internal fluid, multiple tightening forces, information on the bolts, etc. to grasp the tightening torque (for example, Patent Document 1).
It is known that, with regard to the tightening of the bolt, the strain generated in the bolt is converted into data and the tightening state of the bolt is made visible (for example, see Patent Document 2).

JP 2014-225219 A JP 2015-141345 A

By the way, bolt tightening torque and axial force values have been used to manage the tightening of gaskets. When fastening, strain occurs in the bolts that fasten the flanges. The reason for this is that it is believed that by measuring this strain, it is possible to understand the load applied from the flange to the gasket.

However, when the relationship between the bolts, flanges and gaskets is examined closely, it is found that although the bolt tightening force acts on the flange, that tightening force only acts indirectly on the gasket via the flange. The flange is subjected to a load caused by the tightening of the bolts, but this load only acts on the gasket via the flange. The torque value and axial force value applied to the bolts are only a load that acts partially on the flange, and cannot be said to represent the load acting on the gasket.

For this reason, the following problems arise in managing the tightening of the gasket:
a) The torque and preload values obtained from the bolts are information about the bolts and do not measure the load on the gasket.
b) The bolt torque and axial force values are only indirect information regarding the load that the gasket receives from the flange and are only a guide to the load that the gasket receives.
c) The bolt torque and axial force values are affected by the tightening condition of the bolts and flanges, and this effect cannot be ignored.

The inventors came to the realization that it would be beneficial to obtain deformation information from the gasket, which deforms due to the load applied between the flanges, and to support flange fastening based on this deformation information.

Therefore, based on the above problems and findings, an object of the present disclosure is to obtain deformation information from a gasket during flange fastening and to support flange fastening by visualizing this deformation information.

In order to achieve the above object, according to one aspect of the flange fastening support system of the present disclosure,
The device includes a gasket installed between flanges fastened by two or more bolts, two or more sensors that detect deformation of the gasket due to a load applied between the flanges when the flanges are fastened and include a contact mechanism that provides electrical continuity between the contacts when the load is equal to or greater than a threshold value, a fastening determination unit that obtains from each sensor one or both of electrical continuity information and non-conductivity information about the contact mechanism and determines the fastening state of each bolt based on a combination of electrical continuity information, a combination of non-conductivity information, or a combination of electrical continuity information and non-conductivity information obtained from at least two adjacent sensors, and an information presentation unit that presents a flange fastening determination result in association with bolt position information.
In this flange fastening support system, the contacts of the contact mechanism are further set to a contact spacing such that the contacts change from non-conductive to conductive when the load is equal to or greater than the threshold value.
In this flange fastening support system, the fastening determination unit may periodically or irregularly acquire the continuity information or the non- conductivity information from each sensor during flange fastening.
In this flange fastening support system, the fastening judgment unit may judge the fastening state of the bolt in response to a judgment instruction operation, and generate notification information including judgment result information of the fastening state.

In order to achieve the above-mentioned object, according to one aspect of the flange fastening support method disclosed herein, the method includes a step of measuring deformation of the gasket using two or more sensors including a contact mechanism that provides electrical continuity between the contacts when the load received by the gasket from between the flanges is equal to or greater than a threshold value during flange fastening; a step of a fastening determination unit acquiring one or both of electrical continuity information and non-conductivity information from each sensor and determining the fastening state of each bolt based on a combination of electrical continuity information, a combination of non-conductivity information, or a combination of electrical continuity information and non-conductivity information acquired from at least two adjacent sensors; and a step of an information presentation unit presenting a flange fastening determination result in association with position information of the bolt.

In order to achieve the above-mentioned object, according to one aspect of the program of the present disclosure, there is provided a program for supporting flange fastening by a computer, the program realizing in the computer the following functions: acquiring one or both of conductivity information and non-conductivity information from two or more sensors including a contact mechanism that provides electrical continuity between the contacts when the load received by the gasket from between the flanges is equal to or greater than a threshold value during flange fastening; determining the fastening state of each bolt based on a combination of conductivity information, a combination of non-conductivity information, or a combination of conductivity information and non-conductivity information obtained from at least two adjacent sensors; and generating flange fastening judgment result information in association with position information of the bolt.

In order to achieve the above-mentioned object, according to one aspect of the flange fastening support device of the present disclosure, there is provided a flange fastening support device that supports flange fastening between flanges with a gasket sandwiched therebetween, and includes a fastening determination unit that detects deformation of the gasket due to a load applied between the flanges , obtains one or both of conductivity information and non-conductivity information between the contacts from two or more sensors including a contact mechanism that provides conductivity between the contacts when the load is equal to or greater than a threshold value, and determines the fastening state of each bolt based on a combination of conductivity information, a combination of non- conductivity information, or a combination of conductivity information and non- conductivity information obtained from at least two adjacent sensors, and an information presentation unit that presents a determination result associated with position information of the bolt.

According to the present disclosure, any of the following effects can be obtained.
(1) When a gasket is subjected to a load between the flanges during flange fastening, deformation information from the gasket can be obtained as continuity or non-continuity information, and the judgment results showing the fastening state can be visualized to support flange fastening.
(2) The deformation of the gasket can be obtained directly from the gasket using a sensor installed on the gasket, and the fastening state of each bolt can be determined using the output information of at least two sensors, that is, a combination of continuity information, a combination of non-continuity information, or a combination of continuity information and non-continuity information. The determination result can be presented in relation to bolt position information, thereby improving the accuracy of flange fastening.
(3) Contractors and managers can refer to the judgment result information in a timely manner while the flanges are being tightened, and can recognize whether the bolts are being tightened too tightly or not and make any adjustments accordingly. This enables the optimization of the flange tightening and the uniformity of the tightening of each flange.
(4) The accuracy of flange fastening management can be improved by visualizing the fastening state of the flange fastening.

FIG. 1 is a diagram showing a flange fastening support system according to a first embodiment. FIG. 4 is a perspective view showing an inner cut portion of the gasket and a sensor. FIG. 4 is an exploded perspective view showing a contact mechanism of the sensor. 4 is a cross-sectional view showing a cross section taken along line IV-IV in FIG. 2. FIG. 13 is a diagram showing the setting of the contact interval of the sensor. FIG. 4 is a perspective view showing a flange fastening portion with a part cut away. FIG. 2 is a cross-sectional view showing a flange fastening portion cut at an arbitrary sensor portion of the gasket. FIG. 1A is a diagram showing the OFF state of the contact mechanism, and FIG. FIG. 2 illustrates the hardware of the flange fastening support system. FIG. 13 is a diagram showing the software of the flange fastening support system. FIG. 13 is a diagram showing a support information database. FIG. 1A is a diagram showing an example of the arrangement relationship between bolts and sensors, FIG. 1B is a diagram showing a sensor output information table, and FIG. 1C is a diagram showing a bolt tightening determination logic table. FIG. 11 is a diagram showing a bolt fastening information table. 11A and 11B are diagrams illustrating an example of a flange fastening support portion. FIG. 13A is a diagram showing a sensor output information display screen, and FIG. 13B is a diagram showing a determination result information display screen. FIG. 13 is a diagram showing a flange fastening support system according to a second embodiment.

First Embodiment
Fig. 1 shows a flange fastening support system 2 according to a first embodiment of the present disclosure. The configuration of this flange fastening support system 2 is an example, and the present disclosure is not limited to such a configuration. In Fig. 1, O is the center of the member, and X, Y, and Z are three-dimensional coordinate axes.

This flange fastening support system 2 is a system that, for example, acquires deformation information directly from the gasket 4 during initial fastening, judges and visualizes the fastening state, and supports flange fastening based on the judgment results. This flange fastening support system 2 includes the gasket 4, multiple sensors 6-1, 6-2, 6-3, 6-4, relay unit 8, and flange fastening support unit 10 to process the deformation information of the gasket 4 and to perform the visualization.

The gasket 4 is, for example, a sheet gasket made of a synthetic resin material processed into a sheet shape. The synthetic resin material used is a resin material containing polytetrafluoroethylene (PTFE) and a filler, but materials such as resins other than PTFE and rubber may also be used. The gasket 4 uses a sheet material of uniform thickness, and is formed from this sheet material by, for example, a punching process.
The gasket 4 includes, for example, an annular gasket body 14 having a circular through hole 12 formed therein, and protrusions 16 are formed in the X-axis direction and the Y-axis direction on the periphery of the gasket body 14, with through holes 18 formed in each of the protrusions 16. The protrusions 16 and the through holes 18 may be formed in two locations in either the X-axis direction or the Y-axis direction.

In the gasket body 14, a restraint portion 20 is set around the through hole 12, and a non-restraint portion 22 is set concentrically with the restraint portion 20. The dashed line is an imaginary line that separates the area of the restraint portion 20 from the area of the non-restraint portion 22. The restraint portion 20 is an area that is restrained by the flange fastening portion. In contrast, the non-restraint portion 22 is an area that is not restrained by the flange fastening portion.
The non-restraint portion 22 is formed with a plurality of inner cut portions 24 for removing deformation of the gasket 4 due to load when the flange is fastened. Each inner cut portion 24 is an example of a cutout portion formed in the gasket 4. Each inner cut portion 24 is, for example, a through hole or a recess that forms an arc concentric with the through hole 12. The inner cut portions 24 are arranged alternately with the through holes 18, but are not limited to this.

The sensors 6-1, 6-2, 6-3, and 6-4 installed in each inner cut section 24 individually detect the deformation that occurs in each inner cut section 24. In other words, the deformation of the gasket 4 that occurs in the non-restrained section 22 is received by the sensors 6-1, 6-2, 6-3, and 6-4, and the deformation is detected by the sensors 6-1, 6-2, 6-3, and 6-4.

Each of the sensors 6-1, 6-2, 6-3, and 6-4 is individually connected to the relay unit 8 by a pair of sensor leads 26-1 and 26-2. The measurement outputs of the sensors 6-1, 6-2, 6-3, and 6-4 are collected and integrated in the relay unit 8.
The flange fastening support section 10 is connected to this relay section 8 by a cable 28 , and the accumulated information of the relay section 8 is taken into the flange fastening support section 10 .
The measurement output of each of the sensors 6-1, 6-2, 6-3, and 6-4 is physical information indicating, for example, conduction (ON) or non-conduction (OFF) that indicates the deformation of the gasket 4. This physical information may be any of ON information, OFF information, impedance information, voltage information, and current information that indicates the deformation of the gasket 4.

The flange fastening support unit 10 is, for example, an example of a flange fastening support device configured in an independent housing. This flange fastening support unit 10 constitutes a computer system that supports flange fastening using deformation information obtained directly from the gasket 4. This flange fastening support unit 10 includes a server 30, an information presentation unit 32, and an information input unit 34. The server 30 is an example of a fastening judgment unit, and judges the fastening state using deformation information of the gasket 4. The information presentation unit 32 presents presentation information such as the judgment result output by the server 30, for example, as text information or video information. The information input unit 34 is used to input or acquire various information required for the flange fastening support processing. This information input or information acquisition includes input of flange information, gasket information, etc. to the server 30, and selection of information presented by the information presentation unit 32.

<Inner cut portion 24 and sensors 6-1, 6-2, 6-3, 6-4>
FIG. 2 shows an example of the inner cut portion 24 of the gasket 4 and the sensor 6-1.
The inner cut portion 24 includes a deformation removal portion 36 and a pair of slit portions 38-1, 38-2 in order to remove deformation that occurs in the gasket 4 when the flange is fastened.
The deformation removal portion 36 includes arcuate wall portions 40-1 and 40-2, vertical wall portions 42-11 and 42-12 divided by a slit portion 38-1, and vertical wall portions 42-21 and 42-22 divided by a slit portion 38-2. Each of the arcuate wall portions 40-1 and 40-2 is concentric with the through hole 12 of the gasket 4 or the peripheral edge 44 of the gasket body portion 14. The vertical wall portions 42-11, 42-12, 42-21 and 42-22 include vertical surfaces perpendicular to the radial vertical surface of the through hole 12 or the tangent to the peripheral edge 44 of the gasket body portion 14.

The slits 38-1 and 38-2, like the arc-shaped wall sections 40-1 and 40-2, are concentric with the through hole 12 of the gasket 4 or the periphery 44 of the gasket body 14. By forming such slits 38-1 and 38-2, the shape retention strength of the vertical wall sections 42-11, 42-12, 42-21 and 42-22 is relaxed, and the deformation in the radial direction and the spacing direction of the arc-shaped wall sections 40-1 and 40-2 is facilitated. Therefore, when the deformation of the gasket 4 spreads from the restraint section 20 to the non-restraint section 22, the spacing D between the arc-shaped wall sections 40-1 and 40-2 changes. This change is applied to the sensors 6-1, 6-2, 6-3 and 6-4 in the corresponding inner cut section 24, and a detection output representing the deformation is taken from one or more of the sensors 6-1, 6-2, 6-3 and 6-4.

The sensors 6-1, 6-2, 6-3, and 6-4 are removably installed within the inner cut portion 24. Each of the sensors 6-1, 6-2, 6-3, and 6-4 has a contact mechanism 48 including contacts 46-1 and 46-2 that move in response to deformation of the inner cut portion 24. This contact mechanism 48 includes a contact support mechanism 50 that movably supports the contacts 46-1 and 46-2. This contact support mechanism 50 is removably installed in the inner cut portion 24, and has multiple stoppers 52 to prevent it from falling off the inner cut portion 24.

<Contact mechanism 48>
FIG. 3 shows the contact mechanism 48 in an exploded view.
Each of the contacts 46-1, 46-2 is formed of a conductive plate having electrical conductivity and elasticity, such as phosphor bronze. For example, each of the contacts 46-1, 46-2 has a mountain-shaped contact portion 54 formed on a conductive plate machined into a rectangular shape, and flat fixing portions 56 are formed on both sides of the contact portion 54. A rectangular fixing hole 58 is formed in each fixing portion 56, and a lead pull-out portion 60 is formed in one of the fixing portions 56. A sensor lead 26-1 is connected to the contact 46-1, and a sensor lead 26-2 is connected to the contact 46-2.

The contact support mechanism 50 is integrally provided with a support wall portion 62-1 that supports the contact 46-1, a support wall portion 62-2 that supports the contact 46-2, and an elastic support portion 64 that causes the support walls 62-1, 62-2 to follow the deformation of the inner cut portion 24.
The support walls 62-1, 62-2 are formed of an insulating material, such as an insulating synthetic resin, that electrically insulates the contacts 46-1, 46-2. In order to improve the ability to follow the deformation of the inner cut portion 24, the support walls 62-1, 62-2 may be provided with elasticity.
The elastic support portion 64 is made of an elastic material such as elastic synthetic resin for elastically supporting the contacts 46-1, 46-2 so that the distance d between the contacts 46-1, 46-2 follows the deformation of the gasket 4 appearing in the inner cut portion 24.
The support wall portion 62-1 is formed with a pair of hook portions 66 for fixing the contacts 46-1, and similarly, the support wall portion 62-2 is formed with a pair of hook portions 66 for fixing the contacts 46-2.

FIG. 4 shows a fixing structure for the contacts 46-1 and 46-2.
The contact 46-1 is fixed to the support wall 62-1 side by engaging the hook portion 66 with the fixing hole 58, and the contact 46-2 is fixed to the support wall 62-2 side by engaging the hook portion 66 with the fixing hole 58.

<Setting the distance d between the contacts 46-1 and 46-2>
FIG. 5 shows the distance d that is set between the contacts 46-1 and 46-2.
In the contact mechanism 48, a distance d between the contact portions 54 is set or adjusted so that the contacts 46-1, 46-2 come into contact when the load F received by the gasket 4 reaches or exceeds a threshold value Fth. The distance d is set or adjusted mainly by adjusting the distance between the contact portions 54, and is optimized by referring to physical information such as the elastic coefficient of the contact support mechanism 50 including the support wall portions 62-1, 62-2 and the elastic support portion 64. Adjusting the distance d makes it possible to absorb the elastic coefficient of the contact support mechanism 50 including the support wall portions 62-1, 62-2 and the elastic support portion 64.

<Flange fastening portion 68>
FIG. 6 shows an example of a flange fastener 68 using a gasket 4 .
This flange fastening portion 68 includes a flange 72-1 at the end of the pipeline 70-1 and a flange 72-2 at the end of the pipeline 70-2. A gasket seat 74 is formed on the opposing surface of each of the flanges 72-1, 72-2. Each of the gasket seats 74 is a circular convex portion that surrounds and protrudes from a circular hole 76 of the flanges 72-1, 72-2. A gasket 4 is installed between these gasket seats 74. Therefore, the restraining portion 20 (FIG. 1) set on the gasket 4 is an area (contact portion) that contacts the flanges 72-1, 72-2, whereas the non-restraining portion 22 (FIG. 1) is an area (non-contact portion) that does not contact the flanges 72-1, 72-2.

The flanges 72-1 and 72-2 are formed with four through holes 78 at angular intervals of, for example, 90 degrees at common positions on the X-axis and Y-axis that are concentric with the Z-axis.
When the flanges are fastened, the gasket 4 is sandwiched between the flanges 72-1, 72-2, the through holes 78 of the flanges 72-1, 72-2 are aligned with the through holes 18 of the gasket 4, and the bolts 80-1, 80-2, 80-3 (not shown), 80-4 are passed through them. A pair of nuts 82 and washers 84 are individually attached to each of the bolts 80-1, 80-2, 80-3, 80-4, sandwiching the flanges 72-1, 72-2 therebetween.

A tightening tool 86 is used to tighten each of the bolts 80-1, 80-2, 80-3, and 80-4. The fitting ring portion 88 is fitted to the nut 82, and a torque T is applied to each of the bolts 80-1, 80-2, 80-3, and 80-4 from the handle portion 90 of the tightening tool 86. This applies a load F from each of the bolts 80-1, 80-2, 80-3, and 80-4 to the flanges 72-1 and 72-2, and this load F is applied from the flanges 72-1 and 72-2 to the gasket 4.

<Changes in shape occurring in the inner cut portion 24 and detection thereof>
FIG. 7 shows a cross section of the flange fastening portion 68 at the sensor 6-1 portion.
When a load F is applied to the gasket 4 from the flanges 72-1 and 72-2, the gasket 4 deforms according to the magnitude of the load F. This deformation appears in the circumferential direction of the gasket 4. This deformation spreads from the restrained portion 20 to the non-restrained portion 22, changing the distance D of the inner cut portion 24.

For example, in sensor 6-1, when a tightening force is applied to bolts 80-1, 80-2, a load F acts from flanges 72-1, 72-2 that receive this tightening force on gasket 4 between gasket seats 74. This load F causes the gasket 4 to deform, spreading from restrained portion 20 to non-restrained portion 22 and reducing distance D of inner cut portion 24. This reduction in distance D is followed by the contacts 46-1, 46-2 of sensor 6-1.
In the sensor 6-1, the contacts 46-1, 46-2 are brought into a non-conductive (OFF) or conductive (ON) state depending on whether the load F received between the flanges 72-1, 72-2 is equal to or greater than a threshold value Fth, and binary information of ON/OFF is obtained.

<Example of deformation detection of inner cut portion 24>
FIG. 8A shows the OFF state of the contacts 46-1 and 46-2.
When the tightening force of each of the bolts 80-1, 80-2, 80-3, and 80-4 is small, such as when the bolts are temporarily fastened, or when the load F applied to the gasket 4 from between the flanges 72-1 and 72-2 is less than the threshold value Fth (F=FL), the change in the gap D appearing in the inner cut portion 24 is small. At this time, the contact portions 54 are not in contact with each other, and the contacts 46-1 and 46-2 are in the OFF state.

FIG. 8B shows the contacts 46-1 and 46-2 in the ON state.
If the fastening force of each of the bolts 80-1, 80-2, 80-3, and 80-4 is large and the load F applied to the gasket 4 from between the flanges 72-1 and 72-2 is equal to or greater than the threshold value Fth (F=FH), the change in the gap D appearing in the inner cut portion 24 is large and the gap D is reduced. At this time, the contact portions 54 transition from a non-contact state to a contact state, and the contacts 46-1 and 46-2 are switched from an OFF state to an ON state.
The other sensors 6-2, 6-3, and 6-4 detect the deformation of the inner cut portion 24 in the same manner, and therefore the description thereof will be omitted.

<Hardware of flange fastening support system 2>
Fig. 9 shows hardware of the flange fastening support system 2. In Fig. 9, the same parts as in Fig. 1 are denoted by the same reference numerals.
The sensors 6-1, 6-2, 6-3, and 6-4 are detachably installed in the inner cut portion 24 and are integrated with the gasket 4.

The relay unit 8 includes a sensor circuit 92 and a relay processing unit 94. The sensor circuit 92 is individually connected to the sensors 6-1, 6-2, 6-3, and 6-4 via sensor leads 26-1 and 26-2, and converts the ON or OFF of the contacts 46-1 and 46-2 into an electrical signal. For example, the sensor circuit 92 supplies power to the contacts 46-1 and 46-2 of the sensors 6-1, 6-2, 6-3, and 6-4, and outputs the ON and OFF states of the contacts 46-1 and 46-2 as voltage levels of L (low potential) and H (high potential), for example.
The relay processing unit 94 includes a processor and a memory unit, holds output information of the sensors 6-1, 6-2, 6-3, and 6-4, and sends the output information of the sensors 6-1, 6-2, 6-3, and 6-4 to the server 30 upon receiving an instruction from the server 30.

The server 30 includes a processor 96, a storage unit 98, a timer 100, and an input/output unit (I/O) 102. The processor 96 executes various programs, such as an OS (Operating System) and a flange fastening support program, stored in the storage unit 98, and generates flange fastening support information.
The storage unit 98 is an example of a recording medium for storing programs such as a flange fastening support program and data such as support information used to execute the program. The storage unit 98 is composed of storage elements such as a ROM (Read-Only Memory) and a RAM (Random-Access Memory). The ROM is used to store various programs such as an OS and a flange fastening support program, a support information database (DB) 120 described below, a sensor output information table 122 that stores judgment information, a bolt fastening judgment logic table 124, a bolt fastening information table 126, and the like. The RAM is used as a work area for information processing.
The timer 100 is an example of a time information output unit, and generates time information such as the timing for measuring flange fastening.
Under the control of the processor 96, the I/O 102 is used for inputting and outputting information, such as acquiring data from the relay unit 8, exchanging data between the memory unit 98 and the processor 96, importing timing information from the timer 100, outputting presentation information to the information presentation unit 32, and operating input information from the information input unit 34.

The information presentation unit 32 is configured, for example, by an LCD (Liquid Crystal Display). The information input unit 34 includes, for example, a keyboard, a touch panel, operation buttons, etc. The touch panel is provided on the screen of the LCD display of the information presentation unit 32, for example.
The flange fastening support unit 10 is movable and includes a housing 104, and the housing 104 includes a power supply unit 106 using a battery or a storage battery. The power supply required by the relay unit 8 may be provided by the power supply unit 106.
The housing 104 is an example of a measurement box, and is required to have a certain level of strength, such as robustness, chemical resistance, water resistance, etc. Therefore, the housing 104 is made of a hard synthetic resin material, such as polycarbonate.

<Software for Flange Fastening Support System 2>
The software executed by the flange fastening support system 2 includes the following functions:
(a) Patterning of sensor output information (sensor output information table 122)
(b) Patterning of flange fastening information (bolt fastening information table 126) using flange fastening determination logic (bolt fastening determination logic table 124)
(c) Visualization of sensor output information and flange fastening information
(d) Processing of this information

FIG. 10 shows an example of software for the flange fastening support system 2.
This software includes a flange fastening information acquisition unit 108, a sensor output information acquisition unit 110, a sensor output information table generation unit 112, a bolt fastening determination unit 114, a bolt fastening information table generation unit 116, a presentation information generation unit 118, a support information DB 120, a sensor output information table 122, a bolt fastening determination logic table 124, a bolt fastening information table 126, and visualized presentation information 128.

The flange fastening information acquisition unit 108 acquires information related to flange fastening, such as the measurement date and time when the flange was fastened, the measurement data number, the flange information, the gasket information, the bolt information, and the sensor information, and stores the information in the support information DB 120. The measurement date and time is real-time information when the flange was fastened. The measurement data number is identification information such as a number for identifying data obtained by measurement. The flange information is identification information for identifying the flanges 72-1 and 72-2, such as the flange specifications to be measured. The gasket information is gasket information for identifying the gasket 4, such as the gasket specifications. The bolt information is identification information for identifying the bolts 80-1, 80-2, 80-3, and 80-4, the nuts 82, and the washers 84, such as the bolt specifications, the nut specifications, and the washer specifications. The sensor information is gasket information for identifying the sensors 6-1, 6-2, 6-3, and 6-4, such as the sensor specifications.

The sensor output information acquisition unit 110 acquires output information of the sensors 6-1, 6-2, 6-3, and 6-4 from the relay unit 8, which aggregates the output information of the sensors 6-1, 6-2, 6-3, and 6-4 when the flanges are fastened. The output information of the sensors 6-1, 6-2, 6-3, and 6-4 is stored in the support information DB 120 together with pattern information indicating the output pattern.
The sensor output information table generating unit 112 generates a sensor output information table 122 (FIG. 12B) using the pattern information and the output information of each of the sensors 6-1, 6-2, 6-3, and 6-4.

The bolt fastening determination unit 114 performs bolt fastening determination using the bolt fastening determination logic table 124 and the output information of the sensors 6-1, 6-2, 6-3, 6-4. This determination result information is stored in the support information DB 120 together with the pattern information.
The bolt fastening information table generator 116 generates the bolt fastening information table 126 using the bolts 80-1, 80-2, 80-3, and 80-4 together with the pattern information.

The presentation information generation unit 118 generates presentation information 128 representing the bolt fastening information stored in the bolt fastening information table 126, and stores the information in the presentation information section 148 of the support information DB 120. The presentation information 128 stored in the presentation information section 148 is provided to the information presentation unit 32 and presented.

<Support information DB 120>
11 shows an example of the support information DB 120. The support information DB 120 includes a support information file 130 that stores support information.
In this support information file 130, a measurement date and time section 132, a measurement data number section 134, a flange section 136, a gasket section 138, a bolt section 140, a sensor section 142, a sensor output information section 144, a bolt fastening information section 146, and a presentation information section 148 are set.

The measurement date and time section 132 stores measurement date and time information of the flange fastening portion 68 .
The measurement data number section 134 stores identification information including a data number for identifying the support information file 130 or the like.
The flange section 136 stores flange information for identifying the flanges 72-1, 72-2, such as attribute information of the flanges 72-1, 72-2 of the flange fastening section 68.
The gasket section 138 stores identification information of the gasket 4 of the flange fastening section 68. This identification information includes attribute information such as specification information of the gasket 4 and manufacturer information.

In the bolt section 140, bolt information representing the bolts 80-1, 80-2, 80-3, and 80-4 used in the flange fastening section 68 is stored.
The sensor section 142 stores sensor information indicating the sensors 6-1, 6-2, 6-3, and 6-4 installed in the gasket 4.
The sensor output information section 144 has a pattern section 144-1 and a sensor number section 144-2. The pattern section 144-1 stores identification information such as an identification number for identifying an output pattern. The sensor number section 144-2 stores sensor numbers S1, S2, S3, and S4 for identifying the sensors 6-1, 6-2, 6-3, and 6-4. Thus, the sensor output information section 144 stores output information representing the output pattern of the pattern section 144-1 and the sensor outputs identified by the sensor numbers S1, S2, S3, and S4.

A pattern section 146-1 and a bolt number section 146-2 are set in the bolt fastening information section 146. Identification information such as an identification number for identifying a fastening pattern is stored in the pattern section 146-1. Bolt numbers b1, b2, b3, and b4 for identifying bolts 80-1, 80-2, 80-3, and 80-4 are set in the bolt number section 146-2. Thus, the bolt fastening information section 146 stores the fastening pattern of the pattern section 146-1 and determination information representing the bolt fastening identified by the bolt numbers b1, b2, b3, and b4.
The presentation information section 148 stores presentation information including the determination result and the like.

<An example of the arrangement of the sensors 6-1, 6-2, 6-3, and 6-4 and the bolts 80-1, 80-2, 80-3, and 80-4>
12A shows an example of the arrangement of sensors 6-1, 6-2, 6-3, and 6-4 and bolts 80-1, 80-2, 80-3, and 80-4. A sensor output information table 122 (FIG. 12B) and a bolt fastening information table 126 (FIG. 12C) are created based on this arrangement, but these are merely examples and the present disclosure is not limited to this presentation.

<Sensor Output Information Table 122>
12B shows the sensor output information table 122. This sensor output information table 122 is a data file in which the sensor output information of each of the sensors 6-1, 6-2, 6-3, and 6-4 is collected and this sensor output information is patterned.
This sensor output information table 122 has a pattern section 150 and a sensor output information section 152. Pattern information such as a pattern number is stored in the pattern section 150. That is, for the four sets of sensors 6-1, 6-2, 6-3, and 6-4, number information for identifying 16 types of pattern information is stored.

Sensor output information sorted by sensor numbers S1, S2, S3, and S4 is stored in the sensor output information section 152. S1 corresponds to the sensor 6-1, S2 to the sensor 6-2, S3 to the sensor 6-3, and S4 to the sensor 6-4.
The output information of sensors 6-1, 6-2, 6-3, and 6-4 consists of two pieces of information, ON information and OFF information, resulting in 16 combinations: "ON, ON, ON, ON", "ON, ON, ON, OFF", ..., and "OFF, OFF, OFF, OFF", and the ON and OFF states are specified by pattern numbers.

<Evaluation process for flange fastening>
The server 30 acquires either or both of the continuity information and non-continuity information that are output from each of the sensors 6-1, 6-2, 6-3, and 6-4.
The evaluation of flange fastening uses output information between at least two sensors adjacent in the circumferential direction of the gasket 4. This is a combination of output information between sensors 6-1 and 6-2, output information between sensors 6-2 and 6-3, output information between sensors 6-3 and 6-4, and output information between sensors 6-4 and 6-1.

Taking bolt 80-1 as an example, the fastening state of bolt 80-1 is determined using output information from sensors 6-4 and 6-1, which are located before and after bolt 80-1. This output information contains either ON information (conductivity information) or OFF information (non-conductivity information) as described above. In this case, the fastening state of bolt 80-1 is determined from the output information from sensors 6-4 and 6-1 using a combination of ON information, a combination of OFF information, or a combination of ON information and OFF information. A bolt fastening determination logic table 124 is used to determine this fastening state.
This relationship also applies to the determination of the fastening states of the bolts 80-2, 80-3, and 80-4.

<Bolt fastening determination logic table 124>
12C shows the bolt fastening determination logic table 124. This bolt fastening determination logic table 124 stores logical information used for flange fastening determination.
An output information combination section 154 and a judgment type section 156 are set in this bolt fastening judgment logic table 124. Sensor number sections 154-1 and 154-2 are set in the output information combination section 154. Sensor number section 154-1 stores sensor information Si represented by sensor numbers S1, S2, S3, and S4 of sensors 6-1, 6-2, 6-3, and 6-4. Sensor number section 154-2 stores sensor information Sj different from sensor numbers S1, S2, S3, and S4 stored in sensor number section 154-1. In Si and Sj, i and j are subscripts for specifying sensor numbers S1, S2, S3, and S4, and Si ≠ Sj.

For Si,j, in the case of sensors 6-1, 6-2, 6-3, and 6-4, the following four pairs are set as the sensor information adjacent in the rotation direction.
When Si=S1: Sj=S4 or Sj=S2
When Si=S2: Sj=S1 or Sj=S3
When Si=S3: Sj=S2 or Sj=S4
When Si=S4: Sj=S3 or Sj=S1

The judgment type section 156 stores judgment result information indicating the judgment type classified by the output information combination section 154. This judgment result information includes the following information.
Assuming that Si=ON or OFF and Sj=ON or OFF, the following judgment results a), b), c) and d) are obtained in this combination judgment.
a) When Si=ON and Sj=ON: The bolt fastening between Si and Sj is passed (=Evaluation A).
b) When Si=OFF and Sj=ON: The bolt fastening between Si and Sj is unsatisfactory (=Evaluation B).
c) When Si=ON and Sj=OFF: The bolt fastening between Si and Sj is unsatisfactory (=Evaluation B).
d) When Si=OFF and Sj=OFF: The bolt between Si and Sj is not tightened (=Evaluation C)
In this judgment, when either Si or Sj is OFF, the connection is made but the connection state is poor and the product is deemed to have failed, and the product is given an evaluation of B. In contrast, when both Si and Sj are OFF, the connection is deemed to be incomplete or not yet connected, and the product is given an evaluation of C.

<Bolt fastening information table 126>
13 shows the bolt fastening information table 126. In this bolt fastening information table 126, a pattern section 158 and a bolt fastening information section 160 are set.
Pattern information that matches pattern section 150 is stored in pattern section 158. That is, for the four sets of bolts 80-1, 80-2, 80-3, and 80-4, number information for identifying 16 different pieces of pattern information is stored.

Bolt fastening evaluation information sorted by bolt numbers b1, b2, b3, and b4 is stored in the bolt fastening information unit 160. In this case, bolt number b1 corresponds to bolt 80-1, bolt number b2 corresponds to bolt 80-2, bolt number b3 corresponds to bolt 80-3, and bolt number b4 corresponds to bolt 80-4.
The fastening evaluation information for bolts 80-1, 80-2, 80-3, and 80-4 consists of three pieces of information: pass (=A), fail (=B), and not fastened (=C). This results in 16 combinations: "A, A, A, A", "B, A, A, B", ..., "C, C, C, C", and from these, fastening evaluation is performed for each of bolts 80-1, 80-2, 80-3, and 80-4 identified by bolt numbers b1, b2, b3, and b4.

<Evaluation of flange fastening and presentation of evaluation results>
When "2" (B in FIG. 12) is extracted from pattern portion 150 of sensor output information table 122, the sensor output information is S1=ON, S2=ON, S3=ON, and S4=OFF. When S3=ON and S4=OFF are applied from this output information to bolt tightening determination logic table 124, the fastening state of bolt number b4 (=bolt 80-4) is evaluated as B, as shown in pattern portion 158 of bolt tightening information table 126. Similarly, when S4=OFF and S1=ON are applied to bolt tightening determination logic table 124, the fastening state of bolt number b1 (=bolt 80-1) is evaluated as B.
By repeating the bolt tightening and evaluation in this manner, the conditions change from S1=OFF, S2=OFF, S3=OFF and S4=OFF to S1=ON, S2=ON, S3=ON and S4=ON, and an evaluation of A is obtained for all determinations of the fastening states of all bolts 80-1, 80-2, 80-3 and 80-4 identified by bolt numbers b1 to b4, and tightening is completed.

<Procedure for handling flange fastening support during flange fastening work>
This flange fastening support processing procedure is an example of a flange fastening support method or a program thereof disclosed herein.
The processing procedure of this flange fastening support includes a sensor output information acquisition step (S101), a bolt fastening determination step (S102), and a presentation information generation step (S103).

Sensor output information acquisition process (S101): During bolt tightening work, output information from sensors 6-1, 6-2, 6-3, and 6-4 is taken into relay unit 8 at regular intervals, for example, every 10 seconds, and is provided to server 30. The output information from sensors 6-1, 6-2, 6-3, and 6-4 is ON/OFF information of contact mechanism 48.

Bolt fastening determination process (S102): From the sensor output information acquired in the sensor output information acquisition process (S101), two pieces of sensor information from the circumferential direction of the flanges 72-1 and 72-2 are combined, and the fastening state of the bolts 80-1, 80-2, 80-3, and 80-4 identified by the bolt numbers b1, b2, b3, and b4 is determined using the bolt fastening information table 126 with reference to the bolt fastening determination logic table 124.

Presentation information generation process (S103): The evaluation results of the fastening states of the bolts 80-1, 80-2, 80-3, and 80-4 are converted into presentation information 128, which is presented by the information presentation unit 32.

<Information presentation unit 32 and information input unit 34>
FIG. 14 shows the information presenting section 32 and the information input section 34 of the flange fastening support section 10 .
In the flange fastening support section 10, an information display screen 164, a judgment button 165, a selection button 166, and instruction buttons 168 and 170 included in the information input section 34 are provided on a front panel 162 of the housing section 104.
During the bolt tightening operation, a measurement information presentation screen 172 is presented on the information presentation screen 164. This measurement information presentation screen 172 includes a measurement date presentation section 174, a measurement data number presentation section 176, a gasket information presentation section 178, an operation instruction presentation section 180, a sensor information presentation section 182, and a bolt tightening pass/fail presentation section 184.

The measurement date presentation unit 174 presents time information indicating the measurement date and time stored in the measurement date and time unit 132 of the support information DB 120. The measurement data number presentation unit 176 presents identification information indicating the data number stored in the measurement data number unit 134 of the support information DB 120.
The gasket information presentation unit 178 presents graphic information indicating the shapes and positions of the gasket 4, bolt numbers b1, b2, b3, b4, and bolts 80-1, 80-2, 80-3, 80-4 and sensors 6-1, 6-2, 6-3, 6-4 identified by sensor numbers S1, S2, S3, S4.

Image information representing a read button 180-1 for instructing data reading and a save button 180-2 for instructing data saving are presented on the operation instruction presentation section 180. The read button 180-1 and the save button 180-2 are an example of the information input section 34 displayed as an image.
The sensor information presentation unit 182 presents ON information display and OFF information display showing the sensor output information specified by the sensor numbers S1, S2, S3, and S4.
The bolt fastening pass/fail indicating section 184 indicates pass, fail or not fastened as evaluation information of the fastening state of the bolts specified by the bolt numbers b1, b2, b3 and b4.

The judgement button 165 is pressed by the installer, for example, when it is determined that flange fastening is complete. The server 30 acquires judgment instruction information by operating the judgement button 165, judges the fastening state of the bolts 80-1, 80-2, 80-3, and 80-4 from the output information of the sensors 6-1, 6-2, 6-3, and 6-4, and presents the evaluation results on the information presentation screen 164. This judgement button 165 may be omitted, and the evaluation results may be automatically presented on the information presentation screen 164.

The selection button 166 is independent of the information presentation screen 164 and is used to select the presented information 128. The instruction button 168 is used to instruct, for example, to move the cursor presented on the presented information 128 upward. The instruction button 170 is used to instruct, for example, to move the cursor presented on the presented information 128 downward.
Then, by selecting the selection button 166, a sensor output information display screen 186 (FIG. 15A) or a determination result information display screen 188 (FIG. 15B) or the like is selectively displayed on the information display screen 164.

<Sensor output information presentation screen 186>
15A shows a sensor output information presentation screen 186. This sensor output information presentation screen 186 presents table information 190 representing the sensor output information table 122 including the sensor output information together with pattern information. This table information 190 presents an ON information display 192 and an OFF information display 194 instead of ON and OFF. This improves the visibility of the presentation information 128 representing the ON and OFF of the sensor output information.

<Judgment result information presentation screen 188>
15B shows a judgment result information presentation screen 188. This judgment result information presentation screen 188 presents table information 196 representing the bolt fastening information table 126 including the bolt fastening information together with the pattern information. In the table information 196, a pass indicator 198 indicating evaluation A, a fail indicator 200 indicating evaluation B, and an unfastened indicator 202 indicating evaluation C are presented. This improves the visibility of the presented information 128 indicating the bolt fastening state. Can be enhanced.

<Advantages of the First Embodiment>
According to the first embodiment, any one of the following effects can be obtained.
(1) The shape deformation occurring in the gasket 4 due to flange fastening can be directly detected by the sensors 6-1, 6-2, 6-3, and 6-4, and can be obtained as binary information of ON or OFF obtained from each of the sensors 6-1, 6-2, 6-3, and 6-4.
(2) The fastening state of the gasket 4 can be evaluated by comparing the binary information output from adjacent sensors in the circumferential direction of the gasket 4, and the evaluation results can be presented as visualized information. This can support flange fastening and increase the reliability of the seal construction.

(3) Compared with the conventional evaluation of flange fastening based on bolt axial force, the evaluation can be performed based on the load F received by the gasket 4 without being affected by the bolts or flanges, thereby improving the evaluation accuracy of the flange fastening.
(4) The load F to be applied to the gasket 4 can be adjusted or regulated by the distance d between the contact points of the sensors 6-1, 6-2, 6-3, and 6-4, and the load F to be applied to the gasket 4 can be made an appropriate load.
(5) Since the sensors 6-1, 6-2, 6-3, and 6-4 can be set at uniform positions in the inner cut portion 24 formed in the gasket 4, the output accuracy of the sensor output information can be improved.

(6) It is possible to achieve optimum load application across the board for plastic gaskets.
(7) When the flanges are tightened, output information from the sensors 6-1, 6-2, 6-3, and 6-4 is obtained at regular time intervals, for example, at 10-second intervals, and the flange tightening is evaluated for each of the bolts 80-1, 80-2, 80-3, and 80-4, and the evaluation information can be presented to the contractor or manager in a timely manner.
(8) The contractor or manager can recognize the evaluation results of the flange fastening in the presented information 128, and can determine whether to continue fastening or complete the fastening based on the recognition results, which can result in speeding up the fastening work.

Second Embodiment
Fig. 16 shows a flange fastening support system 2 according to a second embodiment. In Fig. 16, the same parts as in Fig. 1 are denoted by the same reference numerals.
In the first embodiment, a system has been described in which four sets of sensors 6-1, 6-2, 6-3, and 6-4 are installed for four bolts 80-1, 80-2, 80-3, and 80-4, and the number of voltages and the number of sensors are set to be the same, but it is not necessary for the number of voltages and the number of sensors to be the same.

In the second embodiment, a support system is configured in which four sets of sensors 6-1, 6-2, 6-3, and 6-4 are installed for eight bolts 80-1, 80-2, . . . , and 80-8.
The flange fastening support portion 10 has the same configuration as that of the first embodiment (FIG. 1), and the same parts are given the same reference numerals and the description thereof will be omitted.
In this way, even if the number of sensors is reduced compared to the number of bolts, it is possible to determine the fastening state of adjacent bolts from the output information of the sensors using the determination principle described above.

<Advantages of the Second Embodiment>
According to the second embodiment, in addition to the same effects as those of the first embodiment, it is possible to evaluate flange fastening by reducing the number of sensors relative to the number of bolts, and to visualize the evaluation results.

Other Embodiments
(1) In the above embodiment, sensors 6-1, 6-2, 6-3, and 6-4 are exemplified which provide sensor information that is ON when the load F applied to the gasket 4 is equal to or greater than the threshold value Fth and is OFF when the load F is less than the threshold value Fth. However, a sensor which provides sensor information that is OFF when the load F is equal to or greater than the threshold value Fth and is ON when the load F is less than the threshold value Fth may also be used.
(2) In the above embodiment, sensors 6-1, 6-2, 6-3, and 6-4 are illustrated in which contacts 46-1, 46-2 are formed from conductive plates. However, sensors equipped with electronic switches such as semiconductor switches may also be used, and the present disclosure is not limited to mechanical sensors.
(3) In the above embodiment, a synthetic resin gasket is used as the gasket 4, but the present disclosure is not limited to synthetic resin gaskets.
(4) In the above embodiment, the measurement and evaluation of the change in shape of the gasket 4 during initial fastening of the flange fastening portion 68 is illustrated. However, the present disclosure is not limited to the initial fastening.
(5) In the above embodiment, the sensors 6-1, 6-2, 6-3, and 6-4 are connected to the relay unit 8 via wired connections. However, wireless connections using LPWA, Bluetooth, Wifi, or the like may be used instead of wired connections.

As described above, the most preferred embodiment of the present disclosure has been described. The present disclosure is not limited to the above description. Various modifications and changes are possible for those skilled in the art based on the gist of the invention described in the claims or disclosed in the description for carrying out the invention. It goes without saying that such modifications and changes are included in the scope of the present disclosure.

According to the flange fastening support system, method, program, and device disclosed herein, shape information due to the load of the gasket that fastens between flanges can be obtained to evaluate the fastening condition, and the evaluation information can be visualized. Therefore, the evaluation condition can be recognized by the contractor or manager without being affected by the tightening condition of the bolts or flanges, and highly reliable flange fastening support can be realized.

2 flange fastening support system 4 gasket 6-1, 6-2, 6-3, 6-4 sensor 8 relay section 10 flange fastening support section 12 through hole 14 gasket body section 16 protrusion section 18 through hole 20 restraint section 22 non-restraint section 24 inner cut section 26-1, 26-2 sensor lead 28 cable 30 server 32 information presentation section 34 information input section 36 deformation extraction section 38-1, 38-2 slit section 40-1, 40-2 arc-shaped wall section 42-11, 42-12, 42-21, 42-22 vertical wall section 44 periphery 46-1, 46-2 contact 48 contact mechanism 50 contact support mechanism 52 stopper 54 contact section 56 fixing section 58 fixing hole 60 Lead pull-out portion 62-1, 62-2 Support wall portion 64 Elastic support portion 66 Hook portion 68 Flange fastening portion 70-1, 70-2 Pipe line 72-1, 72-2 Flange 74 Gasket seat 76 Circular hole 78 Through hole 80-1, 80-2, 80-3, 80-4 Bolt 82 Nut 84 Washer 86 Fastening tool 88 Fitting ring portion 90 Handle portion 92 Sensor circuit 94 Relay processing portion 96 Processor 98 Memory portion 100 Timer 102 Input/output portion 104 Housing portion 106 Power supply portion 108 Flange fastening information acquisition portion 110 Sensor output information acquisition portion 112 Sensor output information table generation portion 114 Bolt fastening determination portion 116 Bolt fastening information table generation portion 118 Presentation information generating unit 120 Support information DB
122 Sensor output information table 124 Bolted fastening judgment logic table 126 Bolted fastening information table 128 Presentation information 130 Support information file 132 Measurement date and time section 134 Measurement data number section 136 Flange section 138 Gasket section 140 Bolt section 142 Sensor section 144 Sensor output information section 144-1 Pattern section 144-2 Sensor number section 146 Bolted fastening information section 146-1 Pattern section 146-2 Bolt number section 148 Presentation information section 150 Pattern section 152 Sensor output information section 154 Output information combination section 154-1, 154-2 Sensor number section 156 Judgment type section 158 Pattern section 160 Bolted fastening information section 162 Front panel 164 Information presentation screen 165 Judgment button 166 Selection buttons 168, 170 Instruction button 172 Measurement information presentation screen 174 Measurement date presentation section 176 Measurement data number presentation section 178 Gasket information presentation section 180 Operation instruction presentation section 180-1 Load button 180-2 Save button 182 Sensor information presentation section 184 Bolt fastening pass/fail presentation section 186 Sensor output information presentation screen 188 Judgment result information presentation screen 190 Table information 192 ON information display 194 OFF information display 196 Table information 198 Pass display 200 Fail display 202 Not fastened display

Claims (7)

A gasket is installed between flanges fastened by two or more bolts;
two or more sensors that detect deformation of the gasket due to a load applied between the flanges when the flanges are fastened, and include a contact mechanism that provides electrical continuity between contacts when the load is equal to or greater than a threshold value;
a fastening determination unit that acquires from each sensor one or both of continuity information and non-continuity information of the contact mechanism, and determines the fastening state of each bolt based on a combination of continuity information, a combination of non-continuity information, or a combination of continuity information and non-continuity information acquired from at least two adjacent sensors;
an information presenting unit that presents a flange fastening judgment result in association with bolt position information;
A flange fastening support system comprising: The flange fastening support system according to claim 1 , further comprising a contact spacing set to a value such that the contacts change from non-conductive to conductive when the load is equal to or greater than the threshold value. The flange fastening support system according to claim 1 or 2, further comprising: the fastening determination unit acquiring the continuity information or the non- conductivity information from each sensor periodically or irregularly during flange fastening. Furthermore, the fastening judgment unit judges the fastening state of the bolt in response to a judgment instruction operation, and generates notification information including judgment result information of the fastening state. The flange fastening support system according to any one of claims 1 to 3. a step of measuring deformation of the gasket by two or more sensors including a contact mechanism that provides electrical continuity between contacts when a load applied to the gasket from between the flanges during flange fastening is equal to or greater than a threshold value;
a fastening determination unit acquiring one or both of continuity information and non-continuity information from each sensor, and determining the fastening state of each bolt based on a combination of continuity information, a combination of non-continuity information, or a combination of continuity information and non-continuity information acquired from at least two adjacent sensors;
an information presenting unit presenting a flange fastening judgment result in association with the bolt position information;
A flange fastening support method comprising: A program for supporting flange fastening by a computer,
A function of acquiring either or both of continuity information and non-continuity information from two or more sensors including a contact mechanism that provides electrical continuity between contacts when the load applied to the gasket from between the flanges is equal to or greater than a threshold value when the flanges are fastened;
A function of determining the fastening state of each bolt based on a combination of continuity information, a combination of non-continuity information, or a combination of continuity information and non-continuity information obtained from at least two adjacent sensors;
A function of generating flange fastening judgment result information in association with the bolt position information;
A program for realizing the above on the computer. A flange fastening support device that supports flange fastening between flanges with a gasket sandwiched therebetween,
a fastening determination unit that detects deformation of the gasket due to a load applied between the flanges, obtains one or both of electrical continuity information and non-continuity information between the contacts from two or more sensors including a contact mechanism that provides electrical continuity between the contacts when the load is equal to or greater than a threshold value, and determines the fastening state of each bolt based on a combination of electrical continuity information, a combination of non- continuity information, or a combination of electrical continuity information and non- continuity information obtained from at least two adjacent sensors;
an information presenting unit that presents a determination result associated with the bolt position information;
A flange fastening support device comprising:

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