JP2020154545A - Looseness detection label - Google Patents

Abstract

To provide a looseness detection label capable of suppressing peeling from a component to be bolted and a bolting member when causing the looseness of the bolting member to easily break looseness detection wiring.SOLUTION: A looseness detection label comprises: a film substrate 10 having a labeling region 10c labeled on a component to be bolted by an adhesive layer 50 and labeling regions 10a and 10b labeled on a bolting member by the adhesive layer 50; an antenna 12 formed in the labeling region 10a of the film substrate 10; looseness detection wiring 13 formed over the labeling region 10a and labeling regions 10b and 10c of the film substrate 10; and an IC chip 11 arranged in the labeling region 10a to be connected to the antenna 12 and the looseness detection wiring 13 of the film substrate 10 and capable of detecting a conduction state of the looseness detection wiring 13 to transmit the detection result through the antenna 12 in a non-contact manner. The film substrate 10 has the belt-shaped labeling region 10b labeled on the side surface of the bolting member along the side surface.SELECTED DRAWING: Figure 1

Description

The present invention relates to a looseness detection label that detects looseness of a tightening member tightened to a tightening target component.

Generally, in a vehicle such as a railroad, there is a high possibility that a serious accident will occur if the bolt comes off during traveling. Therefore, conventionally, a skilled worker regularly performs a tapping sound inspection and a visual inspection using a check mark to inspect whether the bolt is loose. However, in such an inspection, there is a possibility that an inspection error may occur due to human factors such as the skill level of the worker and the labor shortage. Therefore, it is conceivable to inspect the looseness of bolts by using a sensor, but a large-scale device, a dedicated bolt, washer, jig, etc. are required.

Therefore, when the IC tag is attached to the cap part of the bolt and a conductor piece made of metal or the like having an opening is attached to the ring fixed to the member to which the bolt is tightened so that the bolt is not loosened. Allows the IC tag to read against the opening when it faces the opening, and when the bolt becomes loose, the bolt rotates so that the IC tag does not face the opening and reads the IC tag. Patent Document 1 discloses a technique for making it impossible and thereby detecting loosening of a bolt. By using this technology, loosening of bolts can be detected without the need for large-scale equipment, dedicated bolts, washers, jigs, or the like.

However, in the technique disclosed in Patent Document 1, if the looseness of the bolt is small, a part of the IC tag may continue to face the opening of the conductor piece, and the IC tag may remain readable. Yes, in that case it will be determined that the bolt is not loose.

Here, a technique for detecting the presence or absence of cracks in the object to be detected by detecting the conduction state of the detection lines using a linear detector in which detection lines are arranged between a pair of films is described in, for example, a patent document. It is disclosed in 2. In this technique, if a crack occurs while the linear detector is attached to the object to be detected, the film breaks and the detection line is broken, and the conduction state of the detection line is detected to detect the object. The presence or absence of cracks in the detected object can be detected.

Therefore, if the above-mentioned detector is attached as a label so that the detection wire straddles the bolt and the pedestal, the detector breaks when the bolt becomes loose, and the detection wire breaks. By detecting the continuity state of the detection line, even if the looseness of the bolt is small, the looseness can be detected.

Japanese Patent No. 5324325 Japanese Patent No. 3940740

As described above, when a label for detecting looseness of a bolt is attached across the bolt and the pedestal, it is attached to the side surface of the bolt, for example, in the case of a hexagonal bolt, to one side surface thereof. .. Therefore, especially when the bolt is small, there is a problem that the label base material is peeled off from the bolt without breaking when the bolt is loosened due to the narrow attachment area on the side surface of the bolt. .. In addition, when the bolt loosens and rotates, a force that tries to peel off from the bolt acts on the part of the label attached to the side surface of the bolt, which also causes the bolt to loosen. In that case, the label base material will be peeled off from the bolt without breaking. In particular, as described above, labels and the like to be attached to vehicles are expected to be used outdoors in a harsh environment, so it is necessary to use a label base material that is solid to some extent. In that case, the label base material becomes more difficult to break and easily peels off from the bolt.

The present invention has been made in view of the problems of the prior art as described above, and the loosening detection wiring is applied to the tightening target component so as to straddle the tightening target component and the tightening member tightened thereto. The looseness detection label, which is attached to the tightening member and detects the looseness of the tightening member by detecting the continuity of the loosening detection wiring, peels off from the tightening target part or the tightening member when the tightening member becomes loose. It is an object of the present invention to provide a looseness detection label which can suppress the loosening and make it easy to break the looseness detection wiring.

In order to achieve the above object, the present invention
A looseness detection label that detects looseness of the tightening member tightened to the part to be tightened.
A base having an adhesive layer laminated on one surface and having a first region to be attached to the tightening target part by the adhesive layer and a second region to be attached to the tightening member by the adhesive layer. With the base material
A communication antenna formed in either the first region or the second region of the base base material, and
Looseness detection wiring formed across the first region and the second region of the base base material, and
The looseness detection wiring is arranged in a region of the first region and the second region of the base base material on which the communication antenna is formed so as to be connected to the communication antenna and the looseness detection wiring. It has a detection means for detecting the continuity state of the above and transmitting the detection result in a non-contact manner via the communication antenna.
The base base material has a band-like shape in which a region of the second region to be attached to the side surface of the tightening member is attached along the side surface.

In the present invention configured as described above, in a state where the tightening member is tightened to the tightening target component, the first region of the base base material is attached to the tightening target component and the second base material is second. When the region of No. 1 is attached to the tightening member and then the tightening member tightened to the tightening target component is loosened, the base base material is distorted between the first region and the second region. At this time, the base base material exerts a force to break near the boundary between the first region and the second region, and in particular, the region of the second region attached to the side surface of the tightening member. Is exerted a force to peel off from the tightening member, but the region attached to the side surface of the tightening member in the second region has a band shape attached along the side surface, so that the second region is formed. Of these, the region attached to the side surface of the tightening member is difficult to peel off from the tightening member, so that the base base material breaks near the boundary between the first region and the second region. .. Here, the looseness detection wiring is formed on the base base material across the first region and the second region, and the looseness detection wiring is in a conductive state when the base base material is not broken. However, if the base base material breaks, the loosening detection wiring is broken and becomes non-conducting. Then, the detection means detects the conduction state of the loosening detection wiring, and the detection result is transmitted non-contact via the communication antenna, so that the tightening member tightened to the tightening target component is loosened. Will be detected.

Further, at the boundary between the first region and the second region of the base base material, a cut line extending from the end edge of the region in a direction orthogonal to the connecting direction between the first region and the second region is formed. If the wiring for detecting looseness is avoided, the tightening member tightened to the part to be tightened is loosened, and the base base material is distorted between the first region and the second region. At that time, the base material is liable to break due to the cut line.

Further, if the region adjacent to at least the second region of the first region has a strip shape parallel to the second region, the tightening member tightened to the part to be tightened is loosened, so that the first region is loosened. When the base base material is distorted between the region and the second region, it becomes difficult to peel off from the part to be tightened even in a part of the first region, so that the base base material is easily broken. Become.

In addition, a region adjacent to at least the second region of the first region and a region of the second region to be attached to the side surface of the tightening member, respectively, from the end side of the region to the first region. If the notch line extending in the direction orthogonal to the connecting direction with the second region is provided so as to avoid the loosening detection wiring, the tightening member tightened to the part to be tightened is loosened, so that the first When the base base material is distorted between the region and the second region, the base base material is likely to break even in a region other than the vicinity of the boundary portion between the first region and the second region.

Further, if the region to be attached to the side surface of the tightening member in the second region is provided with the alignment information according to the shape of the side surface of the tightening member, the side surface of the tightening member in the second region. Although the area to be attached has a band shape to be attached along the side surface, the alignment of the tightening member with respect to the side surface is easy.

According to the present invention, of the second region to be attached to the tightening member of the base base material, the region to be attached to the side surface of the tightening member has a band shape to be attached along the side surface of the tightening member. Therefore, the loosening detection wiring is attached to the tightening target part and the tightening member so as to straddle the tightening target part and the tightening member tightened to the tightening target part, and the looseness detection wiring is detected to detect the conduction state of the tightening member. In the configuration for detecting looseness, it is possible to prevent the tightening member from peeling off from the tightening target component or the tightening member when the tightening member is loosened, and it is possible to easily break the looseness detection wiring.

Further, at the boundary between the first region and the second region of the base base material, a cut line extending from the end edge of the region in a direction orthogonal to the connecting direction between the first region and the second region is formed. In the case where the wiring for detecting looseness is avoided, the base material is distorted between the first region and the second region due to loosening of the tightening member tightened to the part to be tightened. When this occurs, the base material is liable to break due to the cut line.

Further, in the case where the region adjacent to at least the second region of the first region has a strip shape parallel to the second region, the tightening member tightened to the part to be tightened is loosened, so that the first region is loosened. When the base base material is distorted between the first region and the second region, it becomes difficult to peel off from the part to be tightened even in a part of the first region, so that the base base material breaks. It will be easier to do.

In addition, a region adjacent to at least the second region of the first region and a region of the second region to be attached to the side surface of the tightening member, respectively, from the end side of the region to the first region. In the case where the cut line extending in the direction orthogonal to the connecting direction with the second region is provided avoiding the loosening detection wiring, the tightening member tightened to the tightening target part is loosened, so that the first When the base base material is distorted between the first region and the second region, the base base material is likely to break even in a region other than the vicinity of the boundary portion between the first region and the second region. ..

Further, in the second region where the alignment information according to the shape of the side surface of the tightening member is given to the region to be attached to the side surface of the tightening member, the tightening member in the second region Although the region to be attached to the side surface has a band shape to be attached along the side surface, the positioning of the tightening member with respect to the side surface is easy.

It is a figure which shows the 1st Embodiment of the looseness detection label of this invention, (a) is the block diagram seen from the surface direction, (b) is the cross-sectional view of AA'shown in (a), (c). ) Is a cross-sectional view taken along the line BB'shown in (a), and (d) is a cross-sectional view taken along the line CC'shown in (a). It is a figure which shows an example of the adherend to which the looseness detection label shown in FIG. 1 is attached, (a) is a top view, (b) is a side view seen from the direction of arrow A shown in (a). .. It is a figure which shows an example of the state which the looseness detection label shown in FIG. 1 is attached to the adherend shown in FIG. 2, (a) is a block diagram seen from the upper surface, (b) is (a). It is a configuration diagram seen from the direction A shown, and (c) is a configuration diagram seen from the direction B shown in (a). It is a figure for demonstrating the action when the bolt loosens in the state where the looseness detection label shown in FIG. 1 is attached straddling the bolt and the base as shown in FIG. 3, (a). Is a configuration diagram viewed from the upper surface, and (b) is a configuration diagram viewed from the A direction shown in (a). In the looseness detection tag shown in FIG. 1, when distortion occurs between the attachment area attached to the side surface of the head portion of the bolt and the attachment area attached to the base as shown in FIG. It is a figure for demonstrating the action. It is a figure which shows an example of the system for detecting looseness of a bolt with respect to a base using the looseness detection label shown in FIG. It is a flowchart for demonstrating the method of detecting looseness of a bolt with respect to a base using the looseness detection label shown in FIG. 1 in the system shown in FIG. It is a figure which shows another example of the state which the looseness detection label shown in FIG. 1 is attached to the adherend shown in FIG. 2, (a) is a block diagram seen from the upper surface, (b) is (a). ) Is a configuration diagram viewed from the A direction, and (c) is a configuration diagram viewed from the B direction shown in (a). It is a figure for demonstrating the action when the bolt loosens in the state where the looseness detection label shown in FIG. 1 is attached straddling the bolt and the base as shown in FIG. 8 (a). Is a configuration diagram viewed from the upper surface, and (b) is a configuration diagram viewed from the A direction shown in (a). It is a figure which shows the other embodiment of the looseness detection label of this invention. It is a figure which shows an example of the state which the looseness detection label shown in FIG. 10 is attached to the adherend shown in FIG. 2, (a) is the block diagram seen from the upper surface, (b) is (a). It is a configuration diagram seen from the direction A shown, and (c) is a configuration diagram seen from the direction B shown in (a). It is a figure which shows the other embodiment of the looseness detection label of this invention. It is a figure which shows an example of the state which the looseness detection label shown in FIG. 11 is attached to the adherend shown in FIG. 2, (a) is a block diagram seen from the upper surface, (b) is (a). It is a block diagram seen from the direction A shown, and (c) is a block diagram seen from direction B shown in (a).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1A and 1B are views showing an embodiment of the looseness detection label of the present invention, in which FIG. 1A is a configuration diagram viewed from the surface direction, and FIG. 1B is a sectional view taken along the line AA'shown in FIG. (C) is a cross-sectional view taken along the line BB'shown in (a), and (d) is a cross-sectional view taken along the line CC'shown in (a).

In this embodiment, as shown in FIG. 1, a spacer 30 and an adhesive layer 50 are laminated in this order on one surface of the film substrate 10, and a protective film is provided on the other surface of the film substrate 10 via the adhesive layer 40. 20 is a loosening detection label 1 in which 20 is laminated to form a label.

The film substrate 10 serves as a base base material in the present invention, and is made of, for example, a PET film. The film substrate 10 is connected to a sticking region 10a mainly having a regular hexagon, a sticking region 10b having a strip shape connected to the sticking region 10a, and a sticking region 10b on the opposite side of the sticking region 10a. It is composed of a sticking region 10c having a strip-shaped shape, and the sticking regions 10b and 10c are connected to each other in a direction orthogonal to the longitudinal direction.

Two antennas 12 and a looseness detection wiring 13 are formed on the laminated surface of the film substrate 10 with the spacer 30, and an IC chip 11 is mounted on the film substrate 10.

Each of the two antennas 12 is formed of, for example, a copper foil so as to draw an arc along the edge of the attachment region 10a on the attachment region 10a of the laminated surface of the film substrate 10 with the spacer 30. ..

The looseness detection wiring 13 is formed of, for example, a copper foil on the laminated surface of the film substrate 10 with the spacer 30. The looseness detection wiring 13 has one end in the sticking area 10a, extends from there to the sticking area 10b and the sticking area 10c, folds back at the sticking area 10c, and has the other end in the sticking area 10a. It has a loop shape. As a result, the looseness detection wiring 13 is formed so as to straddle the sticking area 10a and the sticking areas 10b and 10c.

The IC chip 11 is provided with two antenna terminals (not shown) and two looseness detection terminals (not shown), and the surface provided with these antenna terminals and the looseness detection terminal serves as a mounting surface. Therefore, it is mounted on the attachment region 10a of the laminated surface of the film substrate 10 with the spacer 30. The antenna terminals of the IC chip 11 are each connected to one end of the antenna 12, and the looseness detection terminals of the IC chip 11 are connected to both ends of the loop of the looseness detection wiring 13. The IC chip 11 detects the resistance value of the loosening detection wiring 13 by passing a current due to electric power obtained by non-contact communication via the antenna 12 through the loosening detection wiring 13, and based on the resistance value, the IC chip 11 is used for loosening detection. The conduction state of the wiring 13 is detected, the detection result is converted into digital information, and non-contact transmission is performed via the antenna 12.

The protective film 20 is made of, for example, the same material as the film substrate 10, and is laminated by an adhesive layer 40 on the entire surface of the film substrate 10 opposite to the surface on which the antenna 12 and the loosening detection wiring 13 are formed. ing.

The spacer 30 is laminated on the sticking region 10a of the surface on which the antenna 12 and the looseness detection wiring 13 of the film substrate 10 are laminated so as to cover the IC chip 11, the antenna 12, and the looseness detection wiring 13. The spacer 30 is made of a non-metal and is made of a soft material such as a foamable acrylic resin.

The adhesive layer 50 is the adhesive layer in the present invention, and is laminated by covering the entire surface of the film substrate 10 on which the spacer 30 is laminated and applying an adhesive.

In the film substrate 10, the protective film 20, and the adhesive layers 40, 50 laminated in this way, slits 14 that serve as cut lines penetrating the front and back are formed in the attachment regions 10b and 10c. The slit 14 extends from both ends of the attachment regions 10b and 10c in the longitudinal direction to a region adjacent to the loosening detection wiring 13 in the longitudinal direction which is orthogonal to the connecting direction with each other. As a result, the slit 14 is provided so as to avoid the loosening detection wiring 13 in the direction orthogonal to the connecting direction from both ends in the longitudinal direction of the attachment regions 10b and 10c. The slit 14 is also formed at the boundary portion between the sticking region 10b and the sticking region 10c. Further, the film substrate 10 is provided with two instruction lines 15 serving as alignment information extending in the connecting direction with each other in the attachment regions 10b and 10c.

Hereinafter, a method of using the looseness detection label 1 configured as described above and an operation at that time will be described.

2A and 2B are views showing an example of an adherend to which the looseness detection label 1 shown in FIG. 1 is attached. FIG. 2A is a top view, and FIG. 2B is viewed from the direction of arrow A shown in FIG. It is a side view.

As shown in FIG. 2, the looseness detection label 1 shown in FIG. 1 includes, for example, a metal base 3 as a tightening target component and a metal bolt 2 as a tightening member to be tightened to the base 3. It is used by being attached to an adherend. In this adherend, a bolt 2 composed of a regular hexagonal head portion 2a and a screw portion 2b extending from one surface of the head portion 2a is provided, and a screw portion 2b is provided in a screw hole 3a formed in the base 3. By being screwed in, the bolt 2 is tightened to the base 3. At that time, the bolt 2 may loosen due to vibration or the like applied from the outside, and the looseness detection label 1 shown in FIG. 1 is used to detect the looseness.

FIG. 3 is a diagram showing an example of a state in which the looseness detection label 1 shown in FIG. 1 is attached to the adherend shown in FIG. 2, where FIG. 3A is a configuration diagram viewed from above, FIG. Is a configuration diagram viewed from the A direction shown in (a), and (c) is a configuration diagram viewed from the B direction shown in (a). The detailed configuration of the looseness detection label 1 such as the laminated structure is not shown so that the explanation is not difficult to understand.

When the looseness detection label 1 shown in FIG. 1 is attached to the adherend shown in FIG. 2 and used for looseness detection of the bolt 2, as shown in FIG. 3, it is applied to the upper surface of the head portion 2a of the bolt 2. The looseness detection label so that the regular hexagon of the head portion 2a and the regular hexagon of the attachment region 10a overlap each other, the attachment region 10b faces the side surface of the head portion 2a, and the attachment region 10c faces the base 3. 1 is attached to the bolt 2 and the base 3 by the adhesive layer 50. That is, in this example, the sticking regions 10a and 10b are the second regions, the sticking regions 10c are the first regions, and the looseness detection label 1 is stuck across the bolt 2 and the base 3. Will be. At this time, since the attachment region 10b facing the side surface of the head portion 2a has a band shape, the attachment region 2a is attached so as to be wound along the three side surfaces of the head portion 2a. The sticking area 10c adjacent to the sticking area 10b also has a strip shape parallel to the sticking area 10b, but there is a slit between the sticking area 10b and the sticking area 10c as described above. Since 14 is formed, it is possible to attach the attachment area 10c to the base 3 while wrapping the attachment area 10b around the three side surfaces of the head portion 2a. Further, since the slit 14 is formed in parallel with the slit 14 formed between the sticking region 10b and the sticking region 10c in each of the sticking regions 10b and 10c, the bolt 2 Even if the heights of the head portions 2a are different, the looseness detection label 1 is bolted 2 with the slits 14 formed in the regions corresponding to the heights as the boundaries between the attachment region 10b and the attachment region 10c. It can be attached across the base 3 and the base 3. Further, the film substrate 10 is provided with two indicator lines 15 extending in the connecting direction with each other in the attachment regions 10b and 10c, so that, for example, the distance between the two indicator lines 15 is bolted 2. By making the width of one side surface of the head portion 2a the same as that of the head portion 2a, the attachment region 10b has a band-like shape to be attached so as to be wound along the side surface of the head portion 2a, but the head portion 2a Alignment with respect to the side surface of the

Further, the two antennas 12 of the looseness detection label 1 are formed in the sticking region 10a of the film substrate 10 so as to draw an arc along the end of the regular hexagon of the sticking region 10a. It has an arc shape along the inscribed circle of the regular hexagon of the head portion 2a of 2. As a result, when the looseness detection label 1 is attached across the bolt 2 and the base 3, the antenna 12 does not protrude from the head portion 2a of the bolt 2, and the length of the antenna 12 can be secured. A long communication distance can be secured.

In the looseness detection label 1 attached across the bolt 2 and the base 3 in this way, the looseness detection wiring 13 is formed in a loop shape to be in a conductive state.

FIG. 4 is for explaining the action when the bolt 2 is loosened in a state where the looseness detection label 1 shown in FIG. 1 is attached straddling the bolt 2 and the base 3 as shown in FIG. (A) is a configuration diagram viewed from above, and (b) is a configuration diagram viewed from the A direction shown in (a). The detailed configuration of the looseness detection label 1 such as the laminated structure is not shown so that the explanation is not difficult to understand.

In a state where the looseness detection label 1 shown in FIG. 1 is attached straddling the bolt 2 and the base 3 as shown in FIG. 3, the bolt 2 is as shown in FIG. 4A due to vibration or the like applied from the outside. When the bolt 2 rotates counterclockwise to loosen the base 3, the bolt 2 is attached to the attachment area 10b and the base 3 attached to the side surface of the head portion 2a as shown in FIG. 4 (b). Distortion occurs between the attached region 10c and the attached region 10c.

FIG. 5 shows a sticking area 10b attached to the side surface of the head portion 2a of the bolt 2 and a sticking area 10c attached to the base 3 in the looseness detection tag 1 shown in FIG. 1 as shown in FIG. It is a figure for demonstrating the action when distortion occurs between and.

As described above, when a distortion occurs between the attachment area 10b attached to the side surface of the head portion 2a of the bolt 2 and the attachment area 10c attached to the base 3, the distortion causes the attachment. A force that tries to break near the boundary between the region 10b and the attachment region 10c acts, and in particular, the attachment region 10b attached to the side surface of the head portion 2a of the bolt 2 is peeled off from the side surface of the head portion 2a. The power to work. At that time, the attachment region 10b attached to the side surface of the head portion 2a of the bolt 2 has a band-like shape and is attached so as to be wound along the three side surfaces of the head portion 2a. As a result, it is difficult to peel off from the side surface of the head portion 2a. As a result, when distortion occurs between the attachment area 10b attached to the head portion 2a of the bolt 2 and the attachment area 10c attached to the base 3, the looseness detection label 1 is as shown in FIG. Breaks in the vicinity of the boundary portion between the sticking region 10b and the sticking region 10c triggered by the slit 14, and the loosening detection wiring 13 is disconnected accordingly, resulting in a non-conducting state. Then, by detecting the non-conducting state of the looseness detection wiring 13, it is detected that the bolt 2 tightened to the base 3 has loosened.

In this way, by detecting that the bolt 2 is loose by utilizing the fact that the looseness detection label 1 is broken when the bolt 2 tightened to the base 3 is loosened, the base 3 is used. Even when the looseness of the bolt 2 tightened to the label 2 is small, the looseness can be detected. In each of the attachment regions 10b and 10c, the slit 14 is formed in parallel with the slit 14 formed between the attachment region 10b and the attachment region 10c, so that the head portion of the bolt 2 is formed. When distortion occurs between the attachment area 10b attached to the side surface of 2a and the attachment area 10c attached to the base 3, other than the vicinity of the boundary between the attachment area 10b and the attachment area 10c. Also in the region, the loosening detection label 1 is likely to break due to these slits 14.

Hereinafter, a specific method for detecting looseness of the bolt 2 with respect to the base 3 by utilizing the above-mentioned action will be described.

FIG. 6 is a diagram showing an example of a system for detecting looseness of the bolt 2 with respect to the base 3 using the looseness detection label 1 shown in FIG.

As a system for detecting looseness of the bolt 2 with respect to the base 3 using the looseness detection label 1 shown in FIG. 1, as shown in FIG. 6, a reading means capable of non-contact communication with the looseness detection label 1 is possible. A system having a reader / writer 5 and a management personal computer 6 as a processing means connected to the reader / writer 5 via a wire or wireless can be considered. It is also conceivable to use a handy terminal having a built-in processing means as well as a reading means as a reader / writer, in which case a management personal computer becomes unnecessary.

FIG. 7 is a flowchart for explaining a method of detecting looseness of the bolt 2 with respect to the base 3 by using the looseness detection label 1 shown in FIG. 1 in the system shown in FIG.

In the looseness detection label 1 shown in FIG. 1, when the reader / writer 5 is close to the looseness detection label 1 and the looseness detection label 1 is detected by the reader / writer 5 (step 1), first, the reader / writer 5 starts from Power is supplied to the looseness detection label 1, and an instruction to detect the continuity state of the looseness detection wiring 13 and transmit the detection result is transmitted to the looseness detection label 1 (step 2). At this time, since the spacer 30 made of non-metal is laminated on the sticking surface of the sticking region 10a of the film substrate 10 with the bolt 2, the looseness detection label 1 is stuck to the bolt 2 made of metal. However, the reader / writer 5 can perform non-contact communication with the looseness detection label 1 without being greatly affected by the metal.

When the power supplied from the reader / writer 5 is obtained by the loosening detection label 1 and the command transmitted from the reader / writer 5 is received by the IC chip 11 via the antenna 12 of the loosening detection label 1 (step 3). ), A current is supplied to the looseness detection wiring 13 by the electric power supplied from the reader / writer 5.

In the IC chip 11, the resistance value of the looseness detection wiring 13 is detected by using the supplied current, so that the conduction state of the looseness detection wiring 13 is detected (step 4). Here, when the looseness detection label 1 is attached to the bolt 2 and the bolt 2 is not loosened as shown in FIG. 3, the looseness detection wiring 13 is in a conductive state, so that the IC chip 11 is in a conductive state. The resistance value of the looseness detection wiring 13 itself will be detected.

In the IC chip 11, when the detected resistance value is the resistance value of the looseness detection wiring 13 itself, it is determined that the looseness detection wiring 13 is in a conductive state, and the determination result is that of the looseness detection wiring 13. As a result of detecting the conduction state, it is converted into digital information and transmitted non-contactly to the reader / writer 5 via the antenna 12 (step 5). Since the resistance value detected by the IC chip 11 when the looseness detection wiring 13 is in the non-conducting state becomes almost infinite as described later, the looseness detection wiring in the IC chip 11 As the resistance value for determining that the 13 is in the conductive state, a resistance value of a certain threshold value or less may be used instead of the resistance value of the looseness detection wiring 13 itself.

On the other hand, the looseness detection label 1 is attached to the bolt 2, and the bolt 2 is loosened as shown in FIG. 4, so that the looseness detection label 1 is broken and the looseness detection wiring 13 is formed as shown in FIG. If the wire is broken, the looseness detection wiring 13 is in a non-conducting state. In that state, even if a current is supplied to the looseness detection wiring 13 by the electric power supplied from the reader / writer 5, the looseness detection wiring 13 is in a non-conducting state, so that the looseness detection wiring 13 has a current. Does not flow, so that the resistance value detected by the IC chip 11 becomes almost infinite.

In the IC chip 11, when the detected resistance value is almost infinite, it is determined that the looseness detection wiring 13 is in a non-conducting state, and the determination result is that the looseness detection wiring 13 is in a conductive state. As a detection result, it is converted into digital information and transmitted non-contactly to the reader / writer 5 via the antenna 12. Since the resistance value detected by the IC chip 11 becomes almost infinite when the looseness detection wiring 13 is in the non-conducting state, the looseness detecting wiring 13 is in the non-conducting state in the IC chip 11. The resistance value for determining the above is not almost infinite, and a wiring having a certain threshold value or more larger than the resistance value of the looseness detection wiring 13 itself may be used.

In this way, in the reader / writer 5, the conduction state of the looseness detection wiring 13 detected by the looseness detection label 1 is non-contact transmitted via the antenna 12.

When the detection result transmitted non-contactly from the looseness detection label 1 to the reader / writer 5 as described above is received by the reader / writer 5 (step 6), the detection result received by the reader / writer 5 is the management personal computer. Transferred to 6 (step 7).

When the detection result transferred from the reader / writer 5 is received by the management personal computer 6 (step 8), the looseness detection label 1 is non-contactly transmitted to the reader / writer 5 in the management personal computer 6, and the management personal computer 6 Based on the detection result transferred to, it is determined whether or not the bolt 2 is loose (step 9). Specifically, in the detection result transferred from the reader / writer 5 to the management personal computer 6, if the looseness detection wiring 13 is in a conductive state, it is determined that the bolt 2 is not loosened, and the looseness detection wiring. When 13 is in a non-conducting state, it is determined that the bolt 2 is loose.

The looseness detection label 1 configured in this way can be used for detecting looseness of bolts fixing the bogie, for example, in a bogie of a railroad vehicle. In that case, if the spacer 30 is made of a soft material such as foamable acrylic resin, looseness detection is detected even if the looseness detection label 1 is blown by the wind or falls off due to vibration while the railroad vehicle is running. The damage caused by the label 1 hitting the human body or the like can be reduced.

FIG. 8 is a diagram showing another example of a state in which the looseness detection label 1 shown in FIG. 1 is attached to the adherend shown in FIG. 2, and FIG. 8A is a configuration diagram viewed from above. b) is a configuration diagram seen from the A direction shown in (a), and (c) is a configuration diagram viewed from the B direction shown in (a). The detailed configuration of the looseness detection label 1 such as the laminated structure is not shown so that the explanation is not difficult to understand.

When the looseness detection label 1 shown in FIG. 1 is attached to the adherend shown in FIG. 2 and used for looseness detection of the bolt 2, as shown in FIG. 8, it is attached to the side surface of the head portion 2a of the bolt 2. The looseness detection label 1 may be attached across the bolt 2 and the base 3 by the adhesive layer 50 so that the attachment areas 10c face each other and the attachment areas 10a and 10b face the base 3. That is, in this example, the sticking areas 10a and 10b are the first areas, the sticking areas 10c are the second areas, and the looseness detection label 1 is stuck across the bolt 2 and the base 3. Will be. At this time, since the attachment region 10c facing the side surface of the head portion 2a has a band shape, the attachment region 2a is attached so as to be wound along the three side surfaces of the head portion 2a. The sticking area 10b adjacent to the sticking area 10c also has a strip shape parallel to the sticking area 10b, but there is a slit between the sticking area 10b and the sticking area 10c as described above. Since 14 is formed, it is possible to attach the attachment area 10b to the base 3 while wrapping the attachment area 10c around the three side surfaces of the head portion 2a. Further, since the slit 14 is formed in parallel with the slit 14 formed between the sticking region 10b and the sticking region 10c in each of the sticking regions 10b and 10c, the bolt 2 Even if the heights of the head portions 2a are different, the looseness detection label 1 is bolted 2 with the slits 14 formed in the regions corresponding to the heights as the boundaries between the attachment region 10b and the attachment region 10c. It can be attached across the base 3 and the base 3. Further, the film substrate 10 is provided with two indicator lines 15 extending in the connecting direction with each other in the attachment regions 10b and 10c, so that, for example, the distance between the two indicator lines 15 is bolted 2. By making the width of one side surface of the head portion 2a the same as that of the head portion 2a, the attachment region 10c has a band-like shape to be attached so as to be wound along the side surface of the head portion 2a, but the head portion 2a Alignment with respect to the side surface of the

In the looseness detection label 1 attached across the bolt 2 and the base 3 in this way, the looseness detection wiring 13 is formed in a loop shape to be in a conductive state.

FIG. 9 is for explaining the action when the bolt 2 is loosened in a state where the looseness detection label 1 shown in FIG. 1 is attached straddling the bolt 2 and the base 3 as shown in FIG. (A) is a configuration diagram viewed from above, and (b) is a configuration diagram viewed from the A direction shown in (a). The detailed configuration of the looseness detection label 1 such as the laminated structure is not shown so that the explanation is not difficult to understand.

In a state where the looseness detection label 1 shown in FIG. 1 is attached straddling the bolt 2 and the base 3 as shown in FIG. 8, the bolt 2 is as shown in FIG. 9A due to vibration or the like applied from the outside. When the bolt 2 rotates counterclockwise and loosens with respect to the base 3, the bolt 2 is attached to the attachment area 10c attached to the side surface of the head portion 2a and the base 3 as shown in FIG. 9B. Distortion occurs between the attached region 10b and the attached region 10b.

Even when the looseness detection label 1 shown in FIG. 1 is attached across the bolt 2 and the base 3 as shown in FIG. 8, the attachment area 10c attached to the side surface of the head portion 2a of the bolt 2 When distortion occurs between the base 3 and the sticking region 10b stuck to the base 3, a force that tries to break near the boundary between the sticking region 10b and the sticking region 10c acts in the same manner as described above. At the same time, in particular, a force is exerted that the attachment region 10c attached to the side surface of the head portion 2a of the bolt 2 tries to peel off from the side surface of the head portion 2a. At that time, the attachment region 10c attached to the side surface of the head portion 2a of the bolt 2 has a band-like shape and is attached so as to be wound along the three side surfaces of the head portion 2a. As a result, it is difficult to peel off from the side surface of the head portion 2a. As a result, when distortion occurs between the attachment area 10c attached to the side surface of the head portion 2a of the bolt 2 and the attachment area 10b attached to the base 3, the loosening detection label 1 is attached to the attachment area 10b. In the vicinity of the boundary portion between the and the sticking region 10c, the slit 14 is used as a trigger to break the wire, and the loosening detection wiring 13 is disconnected to be in a non-conducting state. Then, by detecting the non-conducting state of the looseness detection wiring 13, it is detected that the bolt 2 tightened to the base 3 has loosened.

In this way, by detecting that the bolt 2 is loose by utilizing the fact that the looseness detection label 1 is broken when the bolt 2 tightened to the base 3 is loosened, the base 3 is used. Even when the looseness of the bolt 2 tightened to the label 2 is small, the looseness can be detected. In each of the attachment regions 10b and 10c, the slit 14 is formed in parallel with the slit 14 formed between the attachment region 10b and the attachment region 10c, so that the head portion of the bolt 2 is formed. When distortion occurs between the sticking area 10c stuck to the side surface of 2a and the sticking area 10b stuck to the base 3, other than the vicinity of the boundary between the sticking area 10b and the sticking area 10c. Also in the region, the loosening detection label 1 is likely to break due to these slits 14.

(Other embodiments)
FIG. 10 is a diagram showing another embodiment of the looseness detection label of the present invention, and is a configuration diagram viewed from the surface direction.

As shown in FIG. 10, in this embodiment, the attachment region 110c is not strip-shaped with respect to the one shown in FIG. 1, and the width in the direction orthogonal to the connection direction with the attachment region 10b is the attachment region 10b. The looseness detection label 101 is different in that it is the same as the distance between the two indicating lines 15 formed in the above.

11A and 11B are views showing an example of a state in which the looseness detection label 101 shown in FIG. 10 is attached to the adherend shown in FIG. 2, where FIG. 11A is a configuration diagram viewed from above, FIG. Is a configuration diagram viewed from the A direction shown in (a), and (c) is a configuration diagram viewed from the B direction shown in (a). In addition, the detailed configuration such as the laminated structure of the looseness detection label 101 is not shown so as not to make the explanation difficult to understand.

When the looseness detection label 101 shown in FIG. 10 is attached to the adherend shown in FIG. 2 and used for looseness detection of the bolt 2, as shown in FIG. 11, it is applied to the upper surface of the head portion 2a of the bolt 2. The looseness detection label so that the regular hexagon of the head portion 2a and the regular hexagon of the attachment region 10a overlap each other, the attachment region 10b faces the side surface of the head portion 2a, and the attachment region 110c faces the base 3. The 101 is attached by the adhesive layer 50 across the bolt 2 and the base 3. That is, in this example, the sticking areas 10a and 10b are the second areas, the sticking area 110c is the first area, and the looseness detection label 101 is stuck across the bolt 2 and the base 3. Will be. At this time, also in this embodiment, since the attachment region 10b facing the side surface of the head portion 2a has a band shape, the attachment is attached so as to be wound along the three side surfaces of the head portion 2a. Will be. Further, the film substrate 110 is provided with two indicator lines 15 extending in the connecting direction with each other in the attachment region 10b, so that, for example, the distance between the two indicator lines 15 is set by the head of the bolt 2. By making the width of one side surface of the portion 2a the same, the attachment region 10b has a strip-like shape to be attached so as to be wound along the side surface of the head portion 2a, but the side surface of the head portion 2a. Alignment with respect to is easy.

In the looseness detection label 101 attached across the bolt 2 and the base 3 in this way, the looseness detection wiring 13 is formed in a loop shape to be in a conductive state.

In a state where the looseness detection label 101 shown in FIG. 10 is attached straddling the bolt 2 and the base 3 as shown in FIG. 11, the bolt 2 rotates counterclockwise due to vibration or the like applied from the outside, and the base 3 When loosening occurs, distortion occurs between the sticking region 10b stuck to the side surface of the head portion 2a of the bolt 2 and the sticking region 110c stuck to the base 3.

Then, due to the distortion generated between the sticking area 10b stuck to the side surface of the head portion 2a of the bolt 2 and the sticking area 110c stuck to the base 3, the sticking area 10b and the sticking area 110c In addition to the force acting to break near the boundary portion of the bolt 2, the force to peel off the sticking region 10b attached to the side surface of the head portion 2a of the bolt 2 from the side surface of the head portion 2a is exerted. Also in the form, the attachment region 10b attached to the side surface of the head portion 2a of the bolt 2 has a strip-shaped shape and is attached so as to be wound around the three side surfaces of the head portion 2a. This makes it difficult to peel off from the side surface of the head portion 2a, so that the loosening detection label 101 breaks in the vicinity of the boundary portion between the sticking area 10b and the sticking area 110c, triggered by the slit 14. Along with this, the looseness detection wiring 13 is disconnected and becomes non-conducting. Then, by detecting the non-conducting state of the looseness detection wiring 13, it is detected that the bolt 2 tightened to the base 3 has loosened.

As described above, also in this embodiment, it is detected that the bolt 2 is loose by utilizing the fact that the looseness detection label 101 is broken when the bolt 2 tightened to the base 3 is loosened. As a result, even if the looseness of the bolt 2 tightened to the base 3 is small, the looseness can be detected.

FIG. 12 is a diagram showing another embodiment of the looseness detection label of the present invention, and is a configuration diagram viewed from the surface direction.

As shown in FIG. 12, in this embodiment, the attachment region 210b is not strip-shaped with respect to the one shown in FIG. 1, and the width in the direction orthogonal to the connection direction with the attachment region 10c is the attachment region 10c. The looseness detection label 201 is different in that it is the same as the distance between the two indicating lines 15 formed in the above.

13 is a diagram showing an example of a state in which the looseness detection label 201 shown in FIG. 11 is attached to the adherend shown in FIG. 2, where FIG. 13A is a configuration diagram viewed from above, FIG. Is a configuration diagram viewed from the A direction shown in (a), and (c) is a configuration diagram viewed from the B direction shown in (a). It should be noted that detailed configurations such as a laminated structure of the looseness detection label 201 are not shown so as not to make the explanation difficult to understand.

When the looseness detection label 201 shown in FIG. 12 is attached to the adherend shown in FIG. 2 and used for looseness detection of the bolt 2, as shown in FIG. 13, on the side surface of the head portion 2a of the bolt 2. The looseness detection label 201 is attached across the bolt 2 and the base 3 by the adhesive layer 50 so that the attachment areas 10c face each other and the attachment areas 10a and 210b face each other. That is, in this example, the sticking areas 10a and 210b are the first areas, the sticking areas 10c are the second areas, and the looseness detection label 201 is stuck across the bolt 2 and the base 3. Will be. At this time, since the attachment region 10c facing the side surface of the head portion 2a has a band shape, the attachment region 2a is attached so as to be wound along the three side surfaces of the head portion 2a. Further, the film substrate 210 is provided with two indicator lines 15 extending in the connecting direction with each other in the attachment region 10c, so that, for example, the distance between the two indicator lines 15 is set by the head of the bolt 2. By making the width of one side surface of the portion 2a the same, the attachment region 10c has a strip-like shape to be attached so as to be wound along the side surface of the head portion 2a, but the side surface of the head portion 2a. Alignment with respect to is easy.

In the looseness detection label 201 affixed across the bolt 2 and the base 3 in this way, the looseness detection wiring 13 is formed in a loop shape to be in a conductive state.

In a state where the looseness detection label 201 shown in FIG. 12 is attached straddling the bolt 2 and the base 3 as shown in FIG. 13, the bolt 2 rotates counterclockwise due to vibration or the like applied from the outside, and the base 3 When loosening occurs, distortion occurs between the sticking region 10c stuck to the side surface of the head portion 2a of the bolt 2 and the sticking region 210b stuck to the base 3.

Even when the looseness detection label 201 shown in FIG. 12 is attached across the bolt 2 and the base 3 as shown in FIG. 13, the attachment area 10c attached to the side surface of the head portion 2a of the bolt 2 When distortion occurs between the surface and the attachment area 210b attached to the base 3, a force that tries to break near the boundary between the attachment area 210b and the attachment area 10c acts in the same manner as described above. At the same time, in particular, a force is exerted that the attachment region 10c attached to the side surface of the head portion 2a of the bolt 2 tries to peel off from the side surface of the head portion 2a. At that time, the attachment region 10c attached to the side surface of the head portion 2a of the bolt 2 has a band-like shape and is attached so as to be wound along the three side surfaces of the head portion 2a. As a result, it is difficult to peel off from the side surface of the head portion 2a. As a result, when distortion occurs between the attachment area 10c attached to the side surface of the head portion 2a of the bolt 2 and the attachment area 210b attached to the base 3, the loosening detection label 201 is attached to the attachment area 210b. In the vicinity of the boundary portion between the and the sticking region 10c, the slit 14 is used as a trigger to break the wire, and the loosening detection wiring 13 is disconnected to be in a non-conducting state. Then, by detecting the non-conducting state of the looseness detection wiring 13, it is detected that the bolt 2 tightened to the base 3 has loosened.

In this way, by detecting that the bolt 2 is loosened by utilizing the fact that the looseness detection label 201 is broken when the bolt 2 tightened to the base 3 is loosened, the base 3 is used. Even if the looseness of the bolt 2 tightened to the label 2 is small, the looseness can be detected. In each of the sticking regions 10c and 210b, the slit 14 is formed in parallel with the slit 14 formed between the sticking region 210b and the sticking region 10c, so that the head portion of the bolt 2 is formed. When distortion occurs between the attachment area 10c attached to the side surface of 2a and the attachment area 210b attached to the base 3, other than the vicinity of the boundary portion between the attachment area 210b and the attachment area 10c. Also in the region, the loosening detection label 1 is likely to break due to these slits 14.

In the looseness detection label of the present invention, as shown in FIGS. 10 and 12, the sticking region to be stuck to the side surface of the head portion 2a of the bolt 2 has a band shape and the length in the longitudinal direction thereof is long. If the length is such that the head portion 2a having a regular hexagon is wound around and attached along the three side surfaces, the bolt 2 rotates and loosens the base 3, so that the bolt is attached. Even if distortion occurs between the attachment area attached to the side surface of the head portion 2a of 2 and the attachment area attached to the base 3, the attachment is attached to the side surface of the head portion 2a of the bolt 2. The sticking area is less likely to be peeled off from the side surface of the head portion 2a, which makes it easier for the looseness detection wiring 13 to be disconnected. However, as shown in FIG. 1, in the sticking area to which the base 3 is stuck. However, by having a strip-shaped shape, the bolt 2 rotates and loosens the base 3, so that the bolt 2 is attached to the attachment area attached to the side surface of the head portion 2a and the base 3. When distortion occurs between the attached area and the attached area, it becomes difficult to peel off from the base 3, and the looseness detection wiring 13 can be easily broken.

In the above-described embodiment, the attachment region to be attached to the side surface of the head portion 2a of the bolt 2 shown in FIG. 2 has a strip shape, and the length in the longitudinal direction thereof is a regular hexagon. The length is such that it is wound so as to be wound along three of the six side surfaces of the portion 2a, but the length in the longitudinal direction is along the two or more side surfaces of the head portion 2a. As long as it has a length that allows it to be wrapped and attached, for example, it may have a length that allows it to be wound and attached along the six side surfaces of the head portion 2a.

1,101,201 Loosening detection label 2 Bolt 2a Head part 2b Thread part 3 Base 3a Screw hole 5 Reader / writer 6 Management personal computer 10,110,210 Film substrate 10a-10c, 110c, 210b Adhesion area 11 IC chip 12 Antenna 13 Loosening detection wiring 14 Slit 15 Indicator line 20 Protective film 30 Spacer 40, 50 Adhesive layer

Claims (5)

A looseness detection label that detects looseness of the tightening member tightened to the part to be tightened.
A base having an adhesive layer laminated on one surface and having a first region to be attached to the tightening target part by the adhesive layer and a second region to be attached to the tightening member by the adhesive layer. With the base material
A communication antenna formed in either the first region or the second region of the base base material, and
Looseness detection wiring formed across the first region and the second region of the base base material, and
The looseness detection wiring is arranged in a region of the first region and the second region of the base base material on which the communication antenna is formed so as to be connected to the communication antenna and the looseness detection wiring. It has a detection means for detecting the continuity state of the above and transmitting the detection result in a non-contact manner via the communication antenna.
The base base material is a looseness detection label in which a region of the second region to be attached to the side surface of the tightening member has a band shape to be attached along the side surface. In the looseness detection label according to claim 1,
The base base material extends from the end edge of the region to the boundary portion between the first region and the second region in a direction orthogonal to the connecting direction between the first region and the second region. The notch wire is provided so as to avoid the looseness detection wiring. Looseness detection label. In the looseness detection label according to claim 2,
The base base material is a looseness detection label in which at least a region adjacent to the second region of the first region has a strip shape parallel to the second region. In the looseness detection label according to any one of claims 1 to 3,
The base base material has a region adjacent to at least the second region of the first region and a region of the second region to be attached to the side surface of the tightening member. A looseness detection label in which a notch line extending from an end edge in a direction orthogonal to the connecting direction between the first region and the second region is provided so as to avoid the looseness detection wiring. In the loosening detection label according to any one of claims 1 to 4,
The base base material is a looseness detection label in which alignment information according to the shape of the side surface of the tightening member is given to a region of the second region to be attached to the side surface of the tightening member.

Images