JP2016058333A - Wiring device and wiring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring device and a wiring system that can reduce the contact pressure between a terminal device and an electrical wire and enable the usage state to be grasped.SOLUTION: In a case 100 of a wiring device 1 are held a first connection portion 11 to which an electrical wire L1 from an external power source 2 is electrically connected, and a second connection portion 12 to which an electrical wire L2 from electrical equipment 3 is electrically connected. In the case 100 is held a contact device 13 which is provided at some midpoint of an electrical path for electrically connecting the first connection portion 11 and the second connection portion 12. Each of the first connection portion 11 and the second connection portion 12 has a terminal device to which an electrical wire is electrically connected. The terminal device has, as a constituent component, an electrical wire holding portion formed of a material which is deformed according to temperature variation, and varies in shape so that the contact pressure to the electrical wire increases when the temperature increases to a prescribed temperature or more. The wiring device 1 has a measuring unit 16 for measuring a physical quantity at any one of the inside of the case 100 and the surface of the case 100.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wiring device and a wiring system, and more particularly to a wiring device and a wiring system that are attached to a building construction surface.

  2. Description of the Related Art Conventionally, there has been proposed a switch device that is installed in a state where a rear portion is embedded in an embedded hole provided in a building wall (see, for example, Patent Document 1).

  This switch device is provided with a quick connection type terminal device to which electric wires from a power source and a load are connected. This terminal device includes a terminal plate and a lock spring. The lock spring has a lock spring portion at a portion close to the electric wire insertion hole, and a pressing spring portion at a distant portion. When the core wire of the electric wire is inserted between the terminal plate and the lock spring portion, the lock spring portion bites into the core wire, thereby preventing the electric wire from coming off. Further, the pressing spring portion presses the core wire of the electric wire against the terminal plate, so that the terminal plate and the core wire of the electric wire are electrically connected.

JP 2002-8470 A

  When the switch device is installed, if the electric wire is not fully inserted into the terminal device, the force that the pressing spring part presses the core wire of the electric wire against the terminal plate will be weaker than when the electric wire is inserted to the specified position. The contact resistance between the core wire of the electric wire and the terminal plate may increase. In addition, when the switch device is used for a long time, the force that the lock spring presses the wire core against the terminal plate is weakened due to secular change of the lock spring or vibration applied to the switch device. The contact resistance between them may increase. When the contact resistance between the wire core wire and the terminal plate increases, the Joule heat generated at the contact portion between the wire core wire and the terminal plate during energization may increase, but the switch device is embedded in the wall. Therefore, it was difficult to grasp the usage state of the switch device.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a wiring device and a wiring system in which the contact resistance between the terminal device and the electric wire is reduced and the use state can be grasped.

  A first form of the wiring device according to the present invention is held by a mounting frame fixed to a peripheral portion of a hole provided on a construction surface, and is partially embedded in the hole using the mounting frame. A case attached to the construction surface, and a first connection portion to which an electric wire from an external power source is electrically connected to the case; a second connection portion to which an electric wire from an electric device is electrically connected; A contact device provided in the middle of the electrical path that electrically connects the first connection portion and the second connection portion is held, and the first connection portion and the second connection portion are electrically connected by electric wires. Each of the terminal devices connected to each other, including a measuring unit that measures a physical quantity in either the inside of the case or the surface of the case, and deforms according to a temperature change as a component of the terminal device When the wire is made of a material and exceeds the specified temperature, the wire Characterized by comprising a wire holding portion which changes a shape such as increased contact pressure is.

  A second form of the wiring device according to the present invention is held in a mounting frame fixed to a peripheral portion of a hole provided in the construction surface, and is partially embedded in the hole using the mounting frame. The case includes a case attached to the construction surface, and a first connection portion provided with a terminal device to which an electric wire from an external power source is electrically connected to the case, and an insertion plug provided on the electric wire from the electric device. A second connection portion to be connected and a circuit for electrically connecting the first connection portion and the second connection portion are held, and either in the case or on the surface of the case An electric wire that includes a measuring unit that measures a physical quantity, is formed of a material that deforms in response to a temperature change as a component of the terminal device, and changes to a shape that increases the contact pressure with the electric wire when the temperature exceeds a specified temperature A holding portion is provided.

  The wiring system of the present invention is installed in a distribution board that distributes power to the wiring device and the branch circuit to which the wiring device is connected, and collects the measurement results of the measurement unit transmitted from the transmission unit And a management device that receives the measurement result of the measurement unit collected by the data collection device from the data collection device and manages the measurement result of the measurement unit.

  ADVANTAGE OF THE INVENTION According to this invention, the wiring apparatus and wiring system which reduced the contact resistance between a terminal device and an electric wire, and were able to grasp | ascertain a use condition can be provided.

It is a block diagram of the wiring device of an embodiment. It is an exploded perspective view of the wiring device of an embodiment. It is sectional drawing which shows the construction state of the wiring apparatus of embodiment. It is a block diagram which shows the modification of the wiring apparatus of embodiment. It is a perspective view in the state where the cover of the wiring device of an embodiment was removed. It is a rear view of the wiring device of an embodiment. It is a bottom view of the contact device and terminal device with which the wiring device of an embodiment is provided. It is a perspective view of the contact device and terminal device with which the wiring device of an embodiment is provided. It is a front view which shows the modification of the terminal device with which the wiring apparatus of embodiment is provided. It is a rear view which shows the modification of the wiring apparatus of embodiment. It is a block diagram which shows the modification of the wiring apparatus of embodiment. It is a system configuration figure of the wiring system of an embodiment.

  Embodiments of a wiring device and a wiring system using the wiring device according to the present invention will be described below with reference to the drawings. However, the configuration described below is merely an example of the present invention. The present invention is not limited to the following embodiments, and various modifications can be made according to the design and the like as long as they do not depart from the technical idea of the present invention.

  FIG. 1 is a block diagram of the wiring device 1 of the present embodiment. The wiring device 1 according to the present embodiment is a switch, and includes a first connection unit 11, a second connection unit 12, a contact device 13, a signal processing unit 14, a notification unit 15, a measurement unit 16, and a signal terminal. 17, a communication unit 18, and a power supply unit 19.

  The wiring device 1 includes a case 100 that is held by a mounting frame 20 that is fixed to a peripheral portion of a hole 51 provided in a wall member 50, and an operation handle 120 (see FIGS. 2 and 3). The case 100 includes a first connection unit 11, a second connection unit 12, a contact device 13, a measurement unit 16, a signal processing unit 14, a notification unit 15, a signal terminal 17, and a communication unit 18. And the power supply unit 19 are held. The case 100 is attached to the wall member 50 in a state in which the case 100 is partially embedded in the hole 51 of the wall member 50 using the attachment frame 20 (see FIG. 3). In addition, the wiring apparatus 1 is not limited to what is attached to a wall surface, You may attach to construction surfaces, such as a ceiling surface and a floor surface.

  An electric wire L1 from an external power source 2 such as a commercial AC power source is electrically connected to the first connection unit 11.

  The second connecting portion 12 is electrically connected to the electric wire L2 from the electric device 3. The electrical device 3 includes a JEM-A terminal 301 defined by the Japan Electrical Manufacturers' Association standard.

  The contact device 13 is provided in the middle of an electrical path that electrically connects the first connection portion 11 and the second connection portion 12. The contact device 13 is switched on / off according to the operation of the operation unit. When the contact device 13 is turned on, electric power is supplied from the external power source 2 to the electrical device 3. When the contact device 13 is turned off, the power supply from the external power source 2 to the electrical device 3 is interrupted.

  The signal processing unit 14 implements a predetermined function by executing a program stored in the memory.

  When the notification signal is input from the signal processing unit 14, the notification unit 15 performs a notification operation by, for example, sounding a buzzer.

  The measurement unit 16 measures a physical quantity inside the case 100. The physical quantity measured by the measurement unit 16 is a physical quantity related to the usage state of the wiring device 1 and is, for example, temperature or current. Note that the measurement unit 16 may measure a physical quantity on the surface of the case 100.

  The signal terminal 17 is connected to the JEM-A terminal 301 of the electric device 3 via the signal line L3.

  The communication unit 18 outputs an on / off signal to the electrical device 3 via the signal terminal 17. In addition, the communication unit 18 receives a monitor signal indicating an operation state from the electrical device 3 via the signal terminal 17. The communication unit 18 also has a function as a transmission unit that transmits the measurement result of the measurement unit 16 to an external device. The communication unit 18 transmits the measurement result of the measurement unit 16 to an external device using a wireless communication method. Here, the communication unit 18 performs communication using a wireless communication method that does not require a license. As this type of communication method, for example, specific low-power wireless communication, a wireless communication method compliant with IEEE 802.15.1 which is a communication standard of IEEE (American Institute of Electrical and Electronics Engineers), or wireless compliant with IEEE 802.15.4. There are communication methods.

  The power supply unit 19 receives power supply from the external power supply 2 connected to the first connection unit 11 and supplies power necessary for operation to a circuit such as the signal processing unit 14.

  In the wiring device 1, the temperature inside the case 100 is measured by the measuring unit 16. The signal processing unit 14 periodically captures the measurement result of the measurement unit 16, compares the measurement result of the measurement unit 16 with a preset allowable range, and an abnormality occurs when the measurement result is out of the allowable range. And a notification signal is output to the notification unit 15. At this time, the notification unit 15 sounds a buzzer to notify the surrounding person of the occurrence of an abnormality. Further, the signal processing unit 14 may cause the communication unit 18 to output a signal for turning off the electric device 3 to the electric device 3 when the occurrence of abnormality is detected. At this time, the electrical device 3 stops operating in accordance with the signal input from the wiring device 1 to the JEM-A terminal 301, and the current flowing through the electrical device 3 via the wiring device 1 can be stopped. it can.

  Here, the case 100 is attached to a construction surface (for example, a wall surface) using an attachment frame 20 for attaching the embedded wiring device to the construction surface. Up to three embedded wiring devices can be attached to the mounting frame 20, and the size of this wiring device is called a module size. In this embodiment, the case 100 is formed to have three module dimensions (dimensions that are approximately the same size as three wiring devices having one module dimension arranged in the short direction). All the components of the wiring device 1 are accommodated.

  In the present embodiment, the entire configuration of the wiring device 1 is housed in one case 100. However, as shown in FIG. 4, the wiring device 1 includes two cases 100 and 117, and the configuration of the wiring device 1 is provided. May be stored separately in two cases 100 and 117. The case 100 and the case 117 are formed with one module size, for example. The case 100 houses the first connecting portion 11, the second connecting portion 12, the contact device 13, and the measuring portion 16, and has a configuration in which the measuring portion 16 is added to a general switch. . In the case 117, a signal processing unit 14, a notification unit 15, a signal terminal 17, a communication unit 18, and a power supply unit 19 are accommodated. The case 100 and the case 117 are attached to the same attachment frame 20. The measurement unit 16 housed in the case 100 and the signal processing unit 14 housed in the case 117 are electrically connected via a signal line L4 wired between the cases 100 and 117. Further, the power supply unit 19 housed in the case 117 obtains electric power from the electric circuit in the case 100 via the electric wire L5 wired between the cases 100 and 117. Note that the case 117 may be formed to have two module dimensions (dimensions that are approximately the same size as two single-dimension module wiring devices arranged in the short direction). And the case 117 can be mounted side by side.

  Next, the structure of the wiring device 1 including the two cases 100 and 117 will be described with reference to FIGS. 2, 3, and 5 to 10. 2, 3, and 5 to 10 exemplify a wide handle type switch as the wiring device 1, a switch other than the wide handle type may be used. 2, 3, and 5 to 10, the case 117 is not shown, and only the case 100 is illustrated. In the following description, unless otherwise specified, the description will be made according to the respective directions of the up, down, left, and right directions indicated by arrows in FIG. 2, but the direction when the wiring device 1 is used is not limited to the above-described direction.

  As shown in FIGS. 2 and 3, the case 100 of the wiring device 1 includes a body 101 and a cover 102. As shown in FIG. 5, the body 101 is formed of a thermosetting resin (for example, urea resin) into a box shape having an open front side. The inside of the body 101 is divided into three storage spaces 112 to 114 in the left-right direction by ribs protruding from the inner wall. The terminal device 130 is stored in the left storage space 112 and the right storage space 113, and the contact device 13 is stored in the central storage space 114. The cover 102 is formed of a thermosetting resin (for example, a urea resin) into a box shape with an open rear side. The cover 102 is attached to the body 101 so as to close the opening on the front side of the body 101. In a state where the cover 102 is attached to the body 101, the protrusion 110 provided on the surface of the body 101 fits into the hole 111 provided in the cover 102, and the state where the cover 102 and the body 101 are coupled is maintained. It is.

  Two attachment claws 103 for attaching the case 100 to the attachment frame 20 are provided on each of the left side surface and the right side surface of the case 100. In the right side wall of the case 100, a slit is formed around a portion where the two mounting claws 103 are provided, and a portion where the two mounting claws 103 are provided (this portion is referred to as a movable piece 104) The case 100 is cantilevered at the front end side. Therefore, the two mounting claws 103 provided on the movable piece 104 can be moved to the inside of the case 100 by pushing the protrusion 105 provided on the rear portion of the movable piece 104.

  Two cylindrical shafts 106 for supporting the operation handle 120 are provided on the left side of the front surface of the case 100 so as to be aligned in the vertical direction.

  A push button 107 is attached to the front surface of the case 100 so as to be movable in the front-rear direction. An opening / closing mechanism (not shown) of the contact device 13 is configured so that the on / off of the contact device 13 housed in the case 100 is alternately switched each time the push button 107 is pushed.

  Moreover, as shown in FIG. 6, two through holes 108 are provided on the left and right sides of the rear portion of the case 100 (that is, the rear wall of the body 101). The through hole 108 penetrates the rear wall of the body 101 in the front-rear direction. Electric wires inserted into the through-hole 108 from the outside of the case 100 (the above-described electric wires L1 and L2) are introduced into the case 100 through the through-hole 108 and electrically supplied to the terminal device 130 housed in the case 100. Connected.

  Here, the configurations of the contact device 13 and the terminal device 130 will be described with reference to FIGS. 7 and 8.

  First, the configuration of the terminal device 130 will be described. The terminal device 130 includes two terminal plates 131 and 132 and four lock springs 140. The terminal device 130 includes an electric wire holding unit as its component. The electric wire holding part is formed of a material that deforms in response to a temperature change, and changes to a shape that increases the contact pressure with the electric wire when the temperature exceeds a specified temperature. Here, the specified temperature is a temperature higher than a temperature generated in the terminal device 130 in a normal use state, and is set to a temperature of about 60 ° C. In the present embodiment, the terminal plates 131 and 132 are electric wire holding portions.

  Terminal plates 131 and 132 are each formed of a shape memory alloy having conductivity. In the case 100, storage spaces 112 and 113 are provided on both the left and right sides, a terminal plate 131 is stored in the left storage space 112, and a terminal plate 132 is stored in the right storage space 113.

  Each of the terminal boards 131 and 132 includes two terminal holding parts 133. Each terminal holding portion 133 includes a central piece 134 and two leg pieces 135 and 136 protruding from the central piece 134 in a direction orthogonal to the central piece 134. The terminal holding part 133 is formed in a U-shape with the center piece 134 and the leg pieces 135 and 136 as viewed from the vertical direction (direction perpendicular to the paper surface in FIG. 7). The terminal plates 131 and 132 are housed inside the case 100 so that the opening of the U-shaped terminal holding portion 133 faces the rear side (the lower side in FIG. 7). One lock spring 140 is disposed in the terminal holding portion 133.

  The lock spring 140 is formed by bending a strip of a metal material having elasticity (for example, stainless steel). The lock spring 140 includes a central piece 141, a lock piece 142, and a pressing piece 143. The central piece 141 is formed in a rectangular plate shape. The locking piece 142 is formed to be U-shaped between the locking piece 142 and the central piece 141 by bending one end side in the longitudinal direction of the central piece 141 in the opposite direction. The pressing piece 143 is bent at the end opposite to the locking piece 142 in the longitudinal direction of the central piece 141 so that the shape seen from the vertical direction (direction perpendicular to the paper surface of FIG. 7) becomes an S-shape. Is formed. The lock spring 140 is configured so that the central piece 141 faces the one leg piece 135 of the terminal holding part 133 and the locking piece 142 and the pressing piece 143 face the other leg piece 136 of the terminal holding part 133, respectively. The terminal holding part 133 is disposed. In the state where the terminal plates 131 and 132 and the lock spring 140 are housed in the body 101, the locking piece 142 is located at a position close to the rear wall of the body 101 where the through hole 108 opens (that is, the rear side), The pressing piece 143 is located in front of the locking piece 142.

  Here, when the electric wire 500 is inserted into the through hole 108 of the case 100, the conductor portion 501 of the electric wire 500 is inserted between the lock spring 140 and the leg piece 136. At this time, the end of the locking piece 142 bites into the conductor portion 501 of the electric wire 500, so that the electric wire 500 is hardly pulled out. Further, when the pressing piece 143 hits the conductor portion 501 of the electric wire 500 and is bent, an elastic force is generated in the pressing piece 143, and the conductor portion 501 of the electric wire 500 is pressed against the leg piece 136 by this elastic force. Thereby, the conductor part 501 of the electric wire 500 is electrically connected to the leg piece 136, and the conductor part 501 of the electric wire 500 is electrically connected to the terminal holding portion 133 (the terminal plate 131 or the terminal plate 132). Further, the contact pressure between the conductor portion 501 of the electric wire 500 and the leg piece 136 is secured by the elastic force generated in the pressing piece 143.

  A release button (not shown) is housed inside the case 100 so that a part thereof faces the locking piece 142. As shown in FIG. 6, a through hole 109 is provided in the rear wall of the case 100 at a position corresponding to the release button. When removing the electric wire 500 connected to the terminal device 130, when the tip of a tool is inserted into the through hole 109 and the release button is pushed with this tool, the locking piece 142 is separated from the conductor portion 501 of the electric wire 500 by the release button. Bend in the direction. Thus, when the electric wire 500 is pulled out in a state where the locking piece 142 is separated from the conductor portion 501 of the electric wire 500, the electric wire 500 can be easily detached from the terminal device 130. Here, one of the first connection portion 11 and the second connection portion 12 is constituted by a terminal plate 131, two lock springs 140, and one release button, and the first connection portion 11 and the second connection portion. The other of 12 includes a terminal plate 132, two lock springs 140, and one release button.

  In the present embodiment, the terminal plates 131 and 132 are formed of a conductive shape memory alloy (for example, a Ni—Ti-based or Cu—Zn—Al-based shape memory alloy). When the terminal plates 131 and 132 reach a specified temperature or higher, the inner dimension of the U-shaped portion on both sides of the lock spring 140, that is, the inner dimension D1 (see FIG. 7) of the two leg pieces 135 and 136 becomes the specified temperature. The central piece 134 is curved so as to be smaller than the case of less. For example, if the insertion of the electric wire 500 into the terminal device 130 is insufficient in connection work during construction, or if the position of the electric wire 500 is shifted due to vibration applied during use, the electric wire 500 with respect to the terminal plate 131 or the terminal plate 132 The contact pressure may be lower than the specified contact pressure. When the contact pressure of the electric wire 500 with respect to the terminal plate 131 or the terminal plate 132 is lower than the predetermined contact pressure, the contact resistance between the terminal plate 131 or the terminal plate 132 and the electric wire 500 increases, and the terminal device 130 is heated by Joule heat. The temperature rises. When the temperature of the terminal plates 131 and 132 becomes equal to or higher than a predetermined temperature due to the effect of Joule heat, the terminal plates 131 and 132 are deformed so that the central piece 134 is curved while the two leg pieces 135 and 136 are kept parallel. As a result, the inner dimension D1 of the leg pieces 135, 136 is reduced. When the inner dimension D1 of the leg pieces 135 and 136 is reduced while the electric wire 500 is connected to the terminal device 130, the amount of deflection of the lock spring 140 (the pressing piece 143) increases, and the contact applied to the electric wire 500 from the pressing piece 143. The pressure increases. Therefore, the contact resistance between the terminal plate 131 or the terminal plate 132 and the electric wire 500 is reduced, the Joule heat generated at the contact portion between the terminal plate 131 or the terminal plate 132 and the electric wire 500 is reduced, and the electrical connection is made. Reliability is also improved.

  In the wiring device 1 of this embodiment, instead of the terminal plates 131 and 132, the lock spring 140 may be made of a shape memory alloy having elasticity. When the lock spring 140 is formed of a shape memory alloy, the lock spring 140 may be deformed so that the distance from the terminal plate 131 or the terminal plate 132 is narrowed when the temperature is higher than a specified temperature. If the contact pressure of the electric wire 500 with respect to the terminal plate 131 or the terminal plate 132 becomes lower than the specified contact pressure due to the influence of the wiring work at the time of construction or external vibration during use, the terminal plate 131 or the terminal plate 132 and the electric wire The contact resistance between 500 increases. Here, when the contact resistance between the terminal plate 131 or the terminal plate 132 and the electric wire 500 increases, the Joule heat generated at the contact portion between the terminal plate 131 or the terminal plate 132 and the electric wire 500 increases, and the terminal is caused by the Joule heat. The temperature of the device 130 increases. When the temperature of the lock spring 140 becomes a predetermined temperature or more due to the effect of Joule heat, the lock spring 140 is deformed so that the bending of the bent portions 144 and 145 of the pressing piece 143 becomes gentle. As a result, the distance between the pressing piece 143 and the leg piece 136 is reduced, and the amount of deflection of the pressing piece 143 generated by the pressing piece 143 hitting the electric wire is increased, so that the contact pressure applied to the electric wire 500 by the pressing piece 143 increases. To do. Therefore, the contact resistance between the terminal plate 131 or the terminal plate 132 and the electric wire 500 is reduced, the Joule heat generated at the contact portion between the terminal plate 131 or the terminal plate 132 and the electric wire 500 is reduced, and the electrical connection is made. Reliability is also improved. The terminal plates 131 and 132 and the lock spring 140 are both formed of a shape memory alloy, and when the temperature exceeds a specified temperature, the terminal plate 131 or the terminal plate 132 and the electric wire 500 are increased in contact pressure. The plates 131 and 132 and the lock spring 140 may be deformed.

  Further, in the wiring device 1 of the present embodiment, as shown in FIG. 9, the terminal plate 131 or the leg piece 135 of the terminal plate 132 and the lock spring 140 are opposite to the electric wire 500 with respect to the lock spring 140. You may provide the press body 146 arrange | positioned between. Then, when the pressing body 146 is formed of a shape memory alloy and reaches a predetermined temperature or more, the pressing body 146 may be deformed so as to push the lock spring 140 toward the electric wire 500.

  The pressing body 146 has an elongated plate shape made of a shape memory alloy, and is formed in a V shape that is bent at an obtuse angle in the middle portion in the longitudinal direction. The pressing body 146 is disposed between the lock spring 140 and the leg piece 135 so that both ends in the longitudinal direction are in contact with the leg piece 135 and an intermediate portion in the longitudinal direction is in contact with the central piece 141 of the lock spring 140. Has been. When the pressing body 146 reaches a predetermined temperature or higher, the pressing body 146 is deformed so that the bending angle at the intermediate portion in the longitudinal direction becomes small. Accordingly, when the temperature exceeds the specified temperature, the amount of protrusion D2 from the line segment connecting the both ends in the longitudinal direction to the intermediate portion in the longitudinal direction becomes larger than when the temperature is lower than the specified temperature. Is pushed in a direction approaching the electric wire 500. Therefore, when the temperature exceeds the specified temperature, the contact pressure applied to the electric wire 500 from the pressing piece 143 increases, so that the contact resistance between the terminal plate 131 or the terminal plate 132 and the electric wire 500 decreases. Therefore, Joule heat generated at the contact portion between the terminal plate 131 or the terminal plate 132 and the electric wire 500 is reduced, and the reliability of electrical connection is improved.

  Next, the configuration of the contact device 13 will be described with reference to FIGS. The contact device 13 includes a fixed contact 121 and a movable contact 122.

  The terminal holding part 133 of the terminal plate 131 is provided with a terminal piece 137 that is bent so that the front end protrudes from the center piece 134 toward the terminal plate 132 and the front end protrudes toward the rear side (lower side in FIG. 7). It has been. A fixed contact 121 is fixed to the surface of the terminal piece 137 facing the terminal plate 132 on the front end side.

  The terminal holding portion 133 of the terminal plate 132 is provided with a support piece 138 that protrudes from the center piece 134 toward the rear side and is bent so that its tip protrudes toward the terminal plate 131 side. The lower end portion of the plate-like opening / closing element 123 is in contact with the distal end portion of the support piece 138.

  A movable contact 122 is fixed to the switch 123 at a portion corresponding to the fixed contact 121. The switch 123 is swingable between an ON position where the movable contact 122 is in contact with the fixed contact 121 and an OFF position where the movable contact 122 is separated from the fixed contact 121 with the contact portion with the support piece 138 as a fulcrum. As shown in FIG.

  When the push button 107 is pressed while the movable contact 122 is in contact with the fixed contact 121, the switch 123 is moved to the off position by an opening / closing mechanism (not shown), and the movable contact 122 is separated from the fixed contact 121. It becomes a state. On the other hand, when the push button 107 is pressed while the movable contact 122 is away from the fixed contact 121, the switch 123 is moved to the ON position by the opening / closing mechanism, and the movable contact 122 comes into contact with the fixed contact 121. In this way, each time the push button 107 is pressed once, the contact device 13 is switched between the on state and the off state.

  Next, the operation handle 120 will be described. As shown in FIGS. 2 and 3, the operation handle 120 is formed in a rectangular plate shape that has a larger dimension in the left-right direction and a larger dimension in the vertical direction than the front surface of the push button 107. On the rear surface (rear surface) of the operation handle 120, a bearing portion (not shown) is provided at a portion facing the shaft 106 of the case 100 so that the shaft 106 can be rotated. The operation handle 120 is rotatably supported on one end side (left side) in the left-right direction on the front surface of the case 100 by holding the shaft 106 in the bearing portion. Therefore, when the right side of the operation handle 120 is pushed rearward, the operation handle 120 rotates with a portion supported by the shaft 106 as a fulcrum, and a protrusion (not shown) provided on the back surface of the operation handle 120 pushes the push button 107. It is configured to push in.

  2, 3, and 5 to 10, the case 117 that houses the signal processing unit 14 and the like is not illustrated, but the case 117 includes the shaft 106 and the push button 107 on the front surface. It has the same structure as the case 100 except that it is not provided.

  Next, the mounting frame 20 will be described with reference to FIGS. The mounting frame 20 is formed in a rectangular frame shape having a window hole 23 to which the cases 100 and 117 are mounted by synthetic resin or metal. The mounting frame 20 has a pair of first beam portions 21 facing each other across the window hole 23 in the longitudinal direction (vertical direction in FIG. 2), and a direction intersecting the direction in which the pair of first beam portions 21 are opposed (see FIG. 2 in the left-right direction), a pair of second beam portions 22 facing each other with the window hole 23 therebetween are provided. That is, the space surrounded by the pair of first beam portions 21 and the pair of second beam portions 22 is the window hole 23.

  In each of the pair of first beam portions 21, the first beam portion 21 is fixed to the wall material 50 in a state where the back surface side of the first beam portion 21 is in contact with the surface of the wall material 50 (see FIG. 3). An insertion hole 24 for inserting a screw (not shown) is provided. In addition, each of the pair of first beam portions 21 is provided with a screw hole 25 having a screw groove formed on the inner peripheral surface at the center in the left-right direction outside the insertion hole 24.

  As shown in FIGS. 2 and 3, each of the pair of second beam portions 22 holds the case 100 at the attachment positions of both side portions and the central portion in the longitudinal direction (vertical direction) of the second beam portion 22. 1st holding | maintenance part is provided. That is, in each of the pair of second beam portions 22, two through holes 221 are provided in the central portion in the longitudinal direction of the second beam portion 22. The two through holes 221 are provided at the same interval as the two attachment claws 103 on one side of the case 100. The two through holes 221 are inserted with the attachment claws 103 of the case 100 arranged at the attachment position in the center. Each of the pair of second beam portions 22 is provided with two through holes 222 and 223 on one end side (upper portion) in the longitudinal direction. When the case 100 is disposed at the upper mounting position, the mounting claws 103 of the case 100 are inserted into the two through holes 222 and 223, respectively. Each of the pair of second beam portions 22 is provided with two through holes 222 and 223 on the other end side (lower side portion) in the longitudinal direction. When the case 100 is disposed at the lower attachment position, the attachment claws 103 of the case 100 are inserted into the two through holes 222 and 223, respectively. That is, the first holding portion is configured by the pair of through holes 221 that hold the case 100 at the attachment position of the central portion and the pair of through holes 222 and 223 that hold the case 100 at the attachment positions of the both side portions.

  Further, the mounting frame 20 of the present embodiment is configured to hold the case 100 at a predetermined mounting position other than the both side portions and the center portion in the longitudinal direction of the second beam portion 22. In the present embodiment, the case 100 can be attached to the attachment frame 20 at two attachment positions (a first intermediate position and a second intermediate position) other than both side portions and the central portion. Here, the first intermediate position is an attachment position between the attachment position on one end side (upper side) in the longitudinal direction and the attachment position of the central portion. The second intermediate position is an attachment position between the attachment position on the other end side (lower side) in the longitudinal direction and the attachment position of the central portion.

  Each of the pair of second beam portions 22 is provided with a second holding portion so that the case 100 can be held at each of the first intermediate position and the second intermediate position. That is, in each of the pair of second beam portions 22, a through hole 224 is provided between the through hole 221 and the through hole 223 adjacent in the longitudinal direction of the second beam portion 22. Therefore, when the case 100 is attached to the first intermediate position, the upper attachment claw 103 of the case 100 is inserted into the upper through hole 223, and the lower attachment claw 103 of the case 100 is inserted into the upper through hole 224. Inserted. When the case 100 is attached to the second intermediate position, the lower attachment claw 103 of the case 100 is inserted into the lower through hole 223, and the upper attachment claw 103 of the case 100 is inserted into the lower through hole 224. Inserted. Here, the through hole 223 and the through hole 224 constitute a second holding portion. The through holes 221, 222, and 224 are formed slightly larger than the width of the mounting claw 103. On the other hand, the through-hole 223 serves as both the first holding part and the second holding part. This through hole 223 is inserted into the other through holes 221, 222, so that both the mounting claws 103 of the case 100 arranged on both sides and the mounting claws 103 of the case 100 arranged at the intermediate position can be inserted. The width dimension is larger than 224.

  The case 100 can be attached to the mounting frame 20 by the first holding portion or the second holding portion, and the case 100 is attached to the mounting frame 20 with the front end portion of the case 100 protruding forward from the window hole 23.

  Next, the decorative member 30 attached to the front side of the attachment frame 20 will be described.

  As shown in FIG. 2, the decorative member 30 includes a middle frame 310 attached to the front side of the attachment frame 20 and a cover body 320 attached to the front side of the middle frame 310. The decorative member 30 has a function of making the mounting frame 20 invisible from the front side and exposing only the operation handle 120 operated by a person to the front side.

  The middle frame 310 is formed in a rectangular frame shape having a pair of horizontal pieces 311 and a pair of vertical pieces 312 using a synthetic resin material. Here, the window hole 313 surrounded by the pair of horizontal pieces 311 and the pair of vertical pieces 312 is continuous with the window hole 23 of the attachment frame 20 in the front-rear direction in a state where the middle frame 310 is attached to the attachment frame 20. In the position.

  Each of the pair of horizontal pieces 311 is provided with an insertion hole 314 for inserting a screw at a central portion in the left-right direction. Each of the pair of vertical pieces 312 is formed with a rectangular through-hole 315 at the center and both sides in the longitudinal direction (vertical direction).

  The cover body 320 is a molded product of synthetic resin and includes a front plate 321 and a side plate 322. The front plate 321 has a rectangular shape with four corners as viewed from the front-rear direction, and has a curved shape that swells forward from the periphery toward the center. A rectangular window hole 323 is provided in the center of the front plate 321 so as to penetrate in the front-rear direction. Further, on the rear surface of the front plate 321, a locking portion (not shown) that is inserted into the through-hole 315 and hooked on the peripheral edge of the through-hole 315 is provided at a portion corresponding to the through-hole 315 of the middle frame 310. ing.

  Here, in a state where the mounting frame 20 to which the cases 100 and 117 are attached is fixed to the wall material 50 with screws and the decorative member 30 is attached to the front surface of the mounting frame 20, only the operation handle 120 is exposed from the window hole 323. The operation handle 120 can be operated.

  By the way, the measurement part 16 of the wiring apparatus 1 of this embodiment is provided with the temperature measurement part 161 which measures temperature inside the body 101 (namely, inside the case 100), as shown in FIG. The temperature measurement unit 161 is, for example, a thermistor or a resistance temperature detector, and is disposed in the storage space 113 in which the terminal device 130 is stored inside the case 100. The temperature measurement unit 161 is electrically connected to the signal processing unit 14 housed in the case 117 via an electric wire (not shown). The signal processing unit 14 periodically measures the temperature inside the case 100 (the temperature of the storage space 113 in this embodiment) based on the output of the temperature measurement unit 161. In the present embodiment, the measurement unit 16 measures the temperature inside the case 100, but the temperature may be measured at one or more of the terminal plates 131 and 132, the lock spring 140, and the case 100. FIG. 8 illustrates a temperature measurement location by the measurement unit 16. The measurement unit 16 includes, for example, a measurement point P1 provided on the central piece 134 of the terminal plates 131 and 132, a measurement point P2 provided on the leg piece 135 of the terminal plate 131, and a measurement point P3 provided on the central piece 141 of the lock spring 140. It may be attached to one or more of these and measure its temperature.

  For example, if the contact between the terminal plates 131 and 132 and the electric wire 500 becomes insufficient due to poor connection during construction or the influence of vibration applied during use, the contact resistance between the terminal plates 131 and 132 and the electric wire 500 increases. The Joule heat generated at the contact portion between the terminal plates 131 and 132 and the electric wire increases. When Joule heat increases as compared with a normal use state, the temperatures of the terminal plates 131 and 132, the lock spring 140, and the case 100 increase. When the signal processing unit 14 periodically takes in the measurement temperature from the measurement unit 16 and the measurement temperature of the measurement unit 16 deviates from the preset allowable range, that is, when the measurement temperature of the measurement unit 16 becomes higher than the allowable range, It is determined that the temperature has risen abnormally, and a notification signal is output to the notification unit 15. When the notification signal is input from the signal processing unit 14, the notification unit 15 performs a notification operation by, for example, sounding a buzzer, and is in the vicinity that the temperature of the wiring device 1 is higher than the allowable range. Notify people.

  The physical quantity measured by the measurement unit 16 is not limited to temperature, and a physical quantity other than temperature may be measured. The measuring unit 16 may include a force measuring unit 162 that measures the magnitude of an external force applied to the lock spring 140 in addition to the temperature measuring unit 161 (see FIG. 8). The force measuring unit 162 is, for example, a piezoelectric element using a piezo effect, and is attached to a portion of the central piece 141 of the lock spring 140 facing the leg piece 135. When the electric wire is connected to the terminal device 130, the pressing piece 143 pushes the electric wire, so that a reaction force is applied from the electric wire to the lock spring 140, and the central piece 141 is pressed against the leg piece 135 by this reaction force. The signal processing unit 14 can measure the external force applied to the lock spring 140 from the electric wire by periodically taking the output of the force measuring unit 162. In a state where the electric wire is connected to the terminal device 130, the reaction force applied from the electric wire to the lock spring 140 is equal to the force by which the lock spring 140 presses the electric wire against the leg piece 136. Further, in a state where the electric wire is connected to the terminal device 130, an electric current flows through the terminal plate 131 or the terminal plate 132 and the electric wire, and an electric current flows between the terminal plate 131 or the terminal plate 132 and the lock spring 140. Absent. Therefore, by attaching the force measuring unit 162 to the lock spring 140, the force that the lock spring 140 presses the electric wire against the leg piece 136 without affecting the current flowing through the terminal plate 131 or the terminal plate 132 and the electric wire. It can be measured.

  When the signal processing unit 14 obtains the external force applied to the lock spring 140 based on the output of the force measuring unit 162, the signal processing unit 14 compares the external force applied to the lock spring 140 with a preset allowable range. When the external force applied to the lock spring 140 is below the lower limit of the allowable range, the signal processing unit 14 determines that the contact pressure between the terminal plate 131 or the terminal plate 132 and the electric wire is not sufficiently obtained, and the notification unit 15 A notification signal is output. Further, when the external force applied to the lock spring 140 exceeds the upper limit of the allowable range, the signal processing unit 14 determines that the contact pressure between the terminal plate 131 or the terminal plate 132 and the electric wire is excessive, and the notification unit 15 A notification signal is output. In addition, although the force measurement part 162 is attached to the center piece 141, you may measure the external force which is attached to the press piece 143 and added to the press piece 143. Further, if the current flowing through the terminal plate 131 or the terminal plate 132 and the electric wire may be affected, the force measuring unit 162 is provided on the leg piece 136 and the force with which the electric wire is pressed against the leg piece 136 is directly applied. You may measure.

  The measurement unit 16 may measure the input current from the external power supply 2 as a physical quantity. As shown in FIG. 10, a Rogowski coil 160 is arranged as a current sensor on the rear surface of the case 100 around the through hole 108 into which the electric wire from the external power supply 2 is inserted. The measuring unit 16 measures the input current from the external power source 2 based on the output of the Rogowski coil 160. The signal processing unit 14 periodically fetches the measurement result of the input current from the measurement unit 16 and compares the level of the measurement result of the input current with a preset allowable range. When the measurement result of the input current exceeds the allowable range, the signal processing unit 14 determines that an abnormal current exceeding the allowable range is flowing, and outputs a notification signal to the notification unit 15. Thereby, it is possible to notify surrounding people that an abnormal current is flowing in the wiring device 1. In addition, the Rogowski coil 160 is arrange | positioned around the through-hole 108 in which the electric wire from the electric equipment 3 is inserted, and the measurement part 16 carries out the load current which flows into the electric equipment 3 based on the output of the Rogowski coil 160. You may measure. Since the Rogowski coil 160 is disposed around the through hole 160, the Rogowski coil 160 is less affected by the magnetic field generated by the current flowing in the electric circuit in the case 100, and the current can be measured more accurately.

  Further, in the wiring device according to the present embodiment, as shown in FIG. 11, a blocking unit 150 that is switched on / off by the signal processing unit 14 is provided between the first connection unit 11 and the second connection unit 12. May be.

  The blocking unit 150 includes a contact 151 provided on an electric circuit that electrically connects the first connecting unit 11 and the second connecting unit 12. The contact 151 is a semiconductor power element such as a triac. The blocking unit 150 turns on the contact 151 in a normal state where no off control signal is input from the signal processing unit 14 and turns off the contact 151 when an off control signal is input from the signal processing unit 14.

  When the measurement result of the physical quantity (for example, temperature, external force applied to the lock spring 140, or current) measured by the measurement unit 16 deviates from a preset allowable range, the signal processing unit 14 outputs a notification signal to the notification unit 15. Then, the notification unit 15 performs a notification operation. In addition, when the signal processing unit 14 determines that an abnormality has occurred based on the measurement result of the measurement unit 16, the signal processing unit 14 outputs an off control signal to the blocking unit 150 and turns off the contact 151. Therefore, when the measurement result of the measurement unit 16 is out of the allowable range, the blocking unit 150 turns off the contact 151. Therefore, if the usage state of the wiring device 1 becomes abnormal, the power supply to the electrical device 3 is blocked. can do.

  Next, a wiring system using the wiring device 1 of the present embodiment will be described with reference to FIG.

  The wiring system shown in FIG. 12 includes the wiring device 1 described above, a distribution board 400, a data collection device 410 installed in the distribution board 400, a management device 420, and a display terminal 430. In FIG. 12, only one wiring device 1 is shown. However, the wiring device 1 may be connected to a plurality of branch circuits, or a plurality of wiring devices 1 may be connected to one branch circuit. Also good.

  The distribution board 400 includes a main breaker 401, a plurality of branch breakers 402, a current measuring device 403, a measuring unit 404, a primary interconnection breaker 405, and a data collecting device 410 inside a cabinet (not shown). Is housed.

  A primary-phase terminal of the main breaker 401 is electrically connected to a single-phase three-wire lead wire (not shown) of the external power source 2. A plurality of branch breakers 402 are connected to the secondary side terminal of the main breaker 401 through conductive bars 406 constituting a single-phase three-wire conductive path.

  A branch circuit for distributing power in the building is connected to the secondary terminal of each branch breaker 402. The wiring device 1 described above is connected to a branch circuit branched by the branch breaker 402.

  The current measuring device 403 separately measures the current flowing through each of the plurality of branch breakers 402. Further, voltage value information of the power supply voltage is input from the measurement unit 404 to the current measuring instrument 403. The current measuring device 403 calculates the power consumption in each branch circuit based on the value of the current flowing through each branch breaker 402 and the voltage value information of the power supply voltage.

  The measuring unit 404 collects the power consumption in each branch circuit from the current measuring device 403 and outputs it to the data collecting device 410.

  The primary side terminal of the primary interconnection breaker 405 is electrically connected to the primary side terminal of the main breaker 401. The secondary side terminal of the primary interconnection breaker 405 is electrically connected to the distributed power source 407. The distributed power source 407 is a power source (for example, a solar power generation device) that allows reverse power flow to the power system. The electric power generated by the distributed power source 407 is used in the building and may flow backward to the electric power system.

  The data collection device 410 has a function of collecting power consumption of each branch circuit from the measurement unit 404 and collecting measurement values of the measurement unit 16 from the wiring device 1. The power consumption of each branch circuit collected from the measurement unit 404 is an instantaneous value, and the data collection device 410 calculates the power consumption used in each branch circuit by integrating the power consumption of each branch circuit. You can also. The data collection device 410 informs the management device 420 of the power consumption of each branch circuit collected from the measurement unit 404, the amount of power used in each branch circuit, the measurement result of the measurement unit 16 collected from the wiring device 1, and the like. Send. Data communication is performed between the data collection device 410 and the wiring device 1 or between the data collection device 410 and the management device 420 by wireless communication that does not require a license. As this type of communication method, for example, specific low-power wireless communication, a wireless communication method compliant with IEEE 802.15.1 which is a communication standard of IEEE (American Institute of Electrical and Electronics Engineers), or wireless compliant with IEEE 802.15.4. There are communication methods. Note that the communication method between the data collection device 410 and the wiring device 1 and the communication method between the data collection device 410 and the management device 420 are not limited to wireless communication methods, such as a wired LAN (Local Area Network). Wired communication may be used. Further, both the wireless communication method and the wired communication method may be used in combination as a communication method between the data collection device 410 and the wiring device 1 or a communication method between the data collection device 410 and the management device 420.

Further, the data collection device 410 stores the wiring device 1 and the branch breaker 402 connected to the branch circuit to which the wiring device 1 is connected in association with each other.
As the branch breaker 402, a branch breaker having a function of switching a built-in contact from an on state to an off state when an off signal is input from the outside is used.
When the data collection device 410 determines that the state of the wiring device 1 is abnormal based on the measurement result of the measurement unit 16 collected from the wiring device 1, the data collection device 410 outputs an off signal to the branch breaker 402 corresponding to the wiring device 1. And the branch breaker 402 may be turned off. Thereby, when the state of the wiring device 1 becomes abnormal, the power supply to the wiring device 1 can be stopped.

  The management device 420 is a controller for HEMS (Home Energy Management System), for example. The management device 420 collects the measurement results obtained by the measurement unit 16 of each wiring device 1 from the data collection device 410 and monitors the state of each wiring device 1 based on the measurement results. Further, the management device 420 collects the power consumption of each branch circuit from the data collection device 410 and monitors or controls a device (not shown) corresponding to the HEMS based on the power consumption of each branch circuit. It is configured. The device corresponding to HEMS should just be a management object required in order to grasp | ascertain the supply and demand of energy. Examples of such devices include appliances that use energy such as lighting equipment and air conditioners, and electric vehicles such as lighting devices, solar power generation devices, devices that create energy such as fuel cells, power storage devices, and electric vehicles. Including devices that store energy. In addition, the apparatus corresponding to HEMS is not limited to said apparatus. Further, the data collection device 410 may have the function of the management device 420. In this case, the data collection device 410 having a controller function manages the supply and demand of energy in the building, and monitors or controls equipment corresponding to HEMS.

  The display terminal 430 includes a display device such as a liquid crystal display, and is installed at a predetermined location in the building. The display terminal 430, based on the display data transmitted from the management device 420, the state of each wiring device 1, the amount of energy used in the building, the amount of electricity used for each room or device (power consumption or amount of power used). ) Etc. are displayed on the screen.

  As described above, the wiring device 1 according to the present embodiment is held by the mounting frame 20 fixed to the peripheral portion of the hole 51 provided on the construction surface (the surface of the wall material 50), and uses the mounting frame 20. A case 100 is provided that is attached to the construction surface with a part of the hole 51 being embedded. The case 100 holds the first connection portion 11, the second connection portion 12, and the contact device 13. The electric wire L1 from the external power source 2 is electrically connected to the first connecting portion 11, and the electric wire L2 from the electric device 3 is electrically connected to the second connecting portion 12. The 1st connection part 11 and the 2nd connection part 12 are each provided with the terminal device 130 to which an electric wire is electrically connected. The contact device 13 is provided in the middle of an electrical path that electrically connects the first connection portion 11 and the second connection portion 12. The wiring device 1 includes a measurement unit 16 that measures a physical quantity either in the case 100 or on the surface of the case 100. Furthermore, as a component of the terminal device 130, a wire holding portion (terminal plates 131 and 132) that is formed of a material that deforms in response to a temperature change and changes to a shape that increases the contact pressure with the wire when the temperature exceeds a specified temperature. , A lock spring 140, or a pressing body 146).

  Thereby, in the wiring device 1 such as a switch, the physical quantity to be measured can be monitored from either the inside of the case 100 or the surface of the case 100 from the measurement result of the measuring unit 16. Furthermore, when the contact pressure of the electric wire with respect to the terminal plate 131 or the terminal plate 132 becomes lower than the predetermined contact pressure due to the influence of the wiring work during construction or vibration during use, the space between the terminal plate 131 or the terminal plate 132 and the electric wire. Contact resistance increases, and the temperature of the terminal device 130 rises due to Joule heat. When the temperature of the terminal device 130 becomes equal to or higher than the specified temperature due to Joule heat, the shape of the electric wire holding portion changes to a shape that increases the contact pressure with the electric wire, and therefore, between the terminal plate 131 or the terminal plate 132 and the electric wire. Contact resistance is reduced, and the reliability of electrical connection is improved.

  In the wiring device 1 of the present embodiment, the second connecting portion 12 may be configured to be connected to an insertion plug (not shown) provided on the electric wire from the electric device 3. In addition, a circuit configured to connect the electrical device 3 to the external power source 2 between the first connection unit 11 and the second connection unit 12 may be held inside the case 100.

  Thereby, also in the wiring device 1 such as an outlet, the physical quantity can be monitored from either the inside of the case 100 or the surface of the case 100 from the measurement result of the measuring unit 16. Furthermore, when the contact pressure of the electric wire with respect to the terminal plate 131 or the terminal plate 132 becomes lower than the predetermined contact pressure due to the influence of the wiring work during construction or vibration during use, the space between the terminal plate 131 or the terminal plate 132 and the electric wire. Contact resistance increases, and the temperature of the terminal device 130 rises due to Joule heat. When the temperature of the terminal device 130 becomes equal to or higher than the specified temperature due to Joule heat, the shape of the electric wire holding portion changes to a shape that increases the contact pressure with the electric wire, and therefore, between the terminal plate 131 or the terminal plate 132 and the electric wire. Contact resistance is reduced, and the reliability of electrical connection is improved.

  In the wiring device 1 of the present embodiment, the terminal device 130 preferably includes terminal plates 131 and 132 and a lock spring 140 (spring body). The terminal boards 131 and 132 are formed in a U shape. The lock spring 140 is disposed so as to fit in the U-shaped portion of the terminal plate (the terminal plate 131 or the terminal plate 132), and electrically connects the terminal plate and the electric wire by pressing the electric wire against the terminal plate. It is also preferable that the wire holding part includes terminal plates 131 and 132. The terminal plates 131 and 132 are formed of a material (for example, a shape memory alloy) that deforms in response to a temperature change. When the temperature exceeds a predetermined temperature, the inner dimensions of the U-shaped portions on both sides of the lock spring 140 are reduced. Deform. If the contact pressure of the electric wire with respect to the terminal plate 131 or the terminal plate 132 becomes lower than the prescribed contact pressure due to the influence of the wiring work at the time of construction or vibration during use, between the terminal plate 131 or the terminal plate 132 and the electric wire. The contact resistance increases, and the temperature of the terminal device 130 rises due to Joule heat. When the temperature of the terminal device 130 exceeds a specified temperature due to Joule heat, the inner dimensions of the U-shaped portions on both sides of the lock spring 140 are reduced, so that the contact pressure between the terminal plate 131 or the terminal plate 132 and the electric wire is increased. Become. When the contact pressure between the terminal plate 131 or the terminal plate 132 and the electric wire is increased, the contact resistance between the terminal plate 131 or the terminal plate 132 and the electric wire is reduced, so that the reliability of electrical connection is improved.

  In the wiring device 1 of the present embodiment, the terminal device 130 preferably includes terminal plates 131 and 132 and a lock spring 140, and the electric wire holding portion includes the lock spring 140. The lock spring 140 is formed of a material (for example, a shape memory alloy) that is deformed in response to a temperature change, and is deformed so that the distance from the terminal plate (the terminal plate 131 or the terminal plate 132) is narrowed when the temperature exceeds a specified temperature. To do. If the contact pressure of the electric wire with respect to the terminal plate 131 or the terminal plate 132 becomes lower than the prescribed contact pressure due to the influence of the wiring work at the time of construction or vibration during use, between the terminal plate 131 or the terminal plate 132 and the electric wire. The contact resistance increases, and the temperature of the terminal device 130 rises due to Joule heat. When the temperature of the terminal device 130 becomes equal to or higher than the specified temperature due to Joule heat, the lock spring 140 is deformed so that the distance from the terminal plate (the terminal plate 131 or the terminal plate 132) is narrowed. The contact pressure between 132 and the electric wire increases. When the contact pressure between the terminal plate 131 or the terminal plate 132 and the electric wire is increased, the contact resistance between the terminal plate 131 or the terminal plate 132 and the electric wire is reduced, so that the reliability of electrical connection is improved.

  In the wiring device 1 of the present embodiment, the terminal device 130 preferably includes terminal plates 131 and 132, a lock spring 140, and a pressing body 146. The pressing body 146 may be disposed on the opposite side of the electric wire 500 with respect to the lock spring 140 and between the terminal plate 131 or the terminal plate 132 and the lock spring 140. The electric wire holding part includes a pressing body 146. The pressing body 146 is formed of a material (for example, a shape memory alloy) that deforms according to a temperature change. It is also preferable that the pressing body 146 be deformed so as to push the lock spring 140 in a direction approaching the electric wire 500 when the temperature reaches a predetermined temperature or higher. If the contact pressure of the electric wire with respect to the terminal plate 131 or the terminal plate 132 becomes lower than the prescribed contact pressure due to the influence of the wiring work at the time of construction or vibration during use, between the terminal plate 131 or the terminal plate 132 and the electric wire. The contact resistance increases, and the temperature of the terminal device 130 rises due to Joule heat. When the temperature of the terminal device 130 becomes equal to or higher than the specified temperature due to Joule heat, the pressing body 146 is deformed so as to push the lock spring 140 in a direction approaching the electric wire 500, so The pressure increases. When the contact pressure between the terminal plate 131 or the terminal plate 132 and the electric wire 500 is increased, the contact resistance between the terminal plate 131 or the terminal plate 132 and the electric wire 500 is lowered, so that the reliability of electrical connection is improved.

  In the wiring device 1 of the present embodiment, the measurement unit 16 may be provided on the lock spring 140. Since the physical quantity related to the lock spring 140 can be measured by the measuring unit 16, the state of the lock spring 140 that makes the electric wire contact the terminal plate 131 or the terminal plate 132 can be monitored based on the physical quantity.

  In the wiring device 1 of the present embodiment, the measurement unit 16 may include a force measurement unit 162 that measures the magnitude of the external force applied to the lock spring 140. And the signal processing part 14 (determination part) may judge that abnormality has generate | occur | produced in the connection state of an electric wire, if the measurement result of the force measurement part 162 remove | deviates from an allowable range.

  For example, when the electric wire is not sufficiently connected to the terminal device 130 at the time of construction, the contact pressure between the terminal plates 131 and 132 and the electric wire is insufficient, and the magnitude of the external force applied to the lock spring 140 is below the lower limit of the allowable range. It will be. Since the signal processing unit 14 determines that an abnormality has occurred in the connection state of the electric wire when the magnitude of the external force applied to the lock spring 140 falls below the lower limit value of the allowable range, an initial construction failure can be found.

  Further, in the energized state, when the contact pressure between the terminal plates 131 and 132 and the electric wires falls below a specified value, the contact resistance between the terminal plates 131 and 132 and the electric wires increases, and the terminal plates 131 and 132 and the electric wires The Joule heat generated at the contact site increases. In this embodiment, when the temperature of the terminal plates 131 and 132 becomes equal to or higher than a predetermined temperature due to Joule heat, the wire holding portion is deformed into a shape that increases the contact pressure between the terminal plates 131 and 132 and the electric wires. As a result, the external force applied to the lock spring 140 increases, and the magnitude of the external force applied to the lock spring 140 exceeds the upper limit value of the allowable range. Therefore, the signal processing unit 14 determines the electric wire based on the measurement result of the force measurement unit 162. It can be determined that the connection state of is abnormal.

  When the contact pressure between the terminal plate 131 or the terminal plate 132 and the electric wire exceeds a specified value due to the deformation of the terminal plates 131 and 132, the contact resistance between the terminal plate 131 or the terminal plate 132 and the electric wire is reduced. Joule heat decreases. As a result, when the temperature of the terminal plates 131 and 132 falls below the specified temperature, the terminal plates 131 and 132 return to the state before the deformation, but the contact pressure between the terminal plate 131 or the terminal plate 132 and the electric wire again reaches the specified value. If the temperature is lower, the temperature of the terminal plates 131 and 132 becomes equal to or higher than a specified temperature due to Joule heat. When the temperature of the terminal plates 131 and 132 becomes equal to or higher than the specified temperature, the wire holding portion is deformed into a shape that increases the contact pressure between the terminal plates 131 and 132 and the electric wires. Thereby, since the external force applied to the lock spring 140 exceeds the upper limit value of the allowable range, the signal processing unit 14 can determine that the connection state of the electric wire is abnormal again based on the measurement result of the force measurement unit 162. Here, the signal processing unit 14 may count the number of times that the connection state of the electric wire is determined to be abnormal based on the measurement result of the force measuring unit 162, and when the count value exceeds a predetermined threshold value, You may make the alerting | reporting part 15 alert | report an abnormal state.

  In the wiring device 1 of the present embodiment, the measurement unit 16 may include a force measurement unit 162 that measures the magnitude of the external force applied to the lock spring 140 and a temperature measurement unit 161 that measures the temperature of the terminal device 130. The signal processing unit 14 (determination unit) determines that the connection state of the electric wire is abnormal when the measurement result of the temperature measurement unit 161 exceeds the temperature threshold after the measurement result of the force measurement unit 162 is out of the allowable range. You may judge that.

  In the energized state, when the contact pressure between the terminal plates 131 and 132 and the electric wires falls below a specified value, the contact resistance between the terminal plates 131 and 132 and the electric wires increases, and the contact between the terminal plates 131 and 132 and the electric wires is increased. Joule heat generated at the site increases. When the temperature of the terminal plates 131 and 132 becomes equal to or higher than a predetermined temperature due to Joule heat, the electric wire holding portion is deformed into a shape that increases the contact pressure between the terminal plates 131 and 132 and the electric wires. As a result, the external force applied to the lock spring 140 increases and the magnitude of the external force applied to the lock spring 140 exceeds the upper limit value of the allowable range, so that the signal processing unit 14 causes the measurement result of the force measuring unit 162 to be out of the allowable range. Is detected. Here, even if the electric wire holding portion is deformed, the contact pressure between the terminal plates 131 and 132 and the electric wire is not sufficiently obtained, and the contact resistance between the terminal plates 131 and 132 and the electric wire increases from the normal time. Joule heat generated at contact portions between the terminal plates 131 and 132 and the electric wires increases. Therefore, since the measurement result of the temperature measurement unit 161 exceeds the threshold value of the temperature after the measurement result of the force measurement unit 162 deviates from the allowable range, the signal processing unit 14 (determination unit) has an abnormal wire connection state. Can be detected.

  In the wiring device 1 according to the present embodiment, when the determination unit (the signal processing unit 14) determines that there is an abnormality, the wiring device 1 may include a notification unit 15 that notifies the occurrence of the abnormality. The notification unit 15 can inform the user that an abnormality has occurred.

  In the wiring device 1 according to the present embodiment, when the determination unit (signal processing unit 14) determines that there is an abnormality, the wiring device 1 may include a blocking unit 150 that electrically disconnects between the first connection unit 11 and the second connection unit 12. Good. When the determination unit determines that there is an abnormality, the blocking unit 150 electrically disconnects between the first connection unit 11 and the second connection unit 12, so that the gap between the first connection unit 11 and the second connection unit 12 is established. Since no current flows, the wiring device 1 can be protected and the safety is improved.

  The wiring device 1 of the present embodiment may include a transmission unit (communication unit 18) that transmits the measurement result of the measurement unit 16 to an external device. By transmitting the measurement result of the measurement unit 16 to an external device, the transmission unit can monitor the state of the wiring device 1 even with the external device.

  The wiring system according to the present embodiment includes the above-described wiring device 1, a data collection device 410, and a management device 420. The data collection device 410 is installed on the distribution board 400 that distributes power to the branch circuit to which the wiring device 1 is connected, and collects the measurement results of the measurement unit 16 transmitted from the transmission unit (communication unit 18). The management device 420 receives the measurement result of the measurement unit 16 collected by the data collection device 410 from the data collection device 410 and manages the measurement result of the measurement unit 16.

  Thereby, the data collection device 410 can collect the measurement results of the measurement unit 16 from the plurality of wiring devices 1 and manage them by the management device 420.

  In the wiring system of the present embodiment, the data collection device 410 may store the wiring device 1 and the branch switch connected to the branch circuit to which the wiring device 1 is connected in association with each other. The data collection device 410 is configured to turn off the branch breaker 402 associated with the wiring device 1 based on the measurement result of the measurement unit 16 transmitted from the transmission unit (communication unit 18) of the wiring device 1. Also good. For example, when the data collection device 410 determines that an abnormality has occurred in the wiring device 1 based on the measurement result of the measurement unit 16 transmitted from the wiring device 1, the data collection device 410 turns off the branch breaker 402 corresponding to the wiring device 1. To. Thereby, the data collection device 410 can improve the safety by cutting off the power supply to the wiring device 1.

DESCRIPTION OF SYMBOLS 1 Wiring apparatus 2 External power supply 3 Electric equipment 11 1st connection part 12 2nd connection part 13 Contact apparatus 14 Measurement part 15 Signal processing part (determination part)
16 Notification unit 18 Communication unit (transmission unit)
20 Mounting frame 50 Wall material (construction surface)
51 hole 100 case 108 through hole 130 terminal device 131, 132 terminal plate (wire holding part)
140 Lock spring (spring body, wire holding part)
146 Pressing body (wire holding part)
150 Blocking part 160 Rogowski coil (current sensor)
161 Temperature measurement unit 162 Force measurement unit 400 Distribution board 402 Branch breaker 410 Data collection device 420 Management device L1, L2 Electric wire

Claims (13)

It is held by a mounting frame that is fixed to a peripheral portion of a hole provided in the construction surface, and includes a case that is attached to the construction surface in a state where a part of the mounting frame is embedded in the hole,
A first connection portion to which an electric wire from an external power source is electrically connected to the case; a second connection portion to which an electric wire from an electric device is electrically connected; and the first connection portion and the second connection. And a contact device provided in the middle of the electric circuit that electrically connects the unit,
The first connection portion and the second connection portion each include a terminal device to which an electric wire is electrically connected,
A measuring unit for measuring a physical quantity in any one of the inside of the case and the surface of the case;
As a component of the terminal device, it is formed of a material that deforms in response to a temperature change, and includes a wire holding portion that changes to a shape that increases the contact pressure with the wire when the temperature exceeds a specified temperature. Wiring device to do. It is held by a mounting frame that is fixed to a peripheral portion of a hole provided in the construction surface, and includes a case that is attached to the construction surface in a state where a part of the mounting frame is embedded in the hole,
A first connecting portion provided with a terminal device to which an electric wire from an external power source is electrically connected to the case; a second connecting portion to which a plug provided on an electric wire from an electric device is connected; and A circuit that electrically connects the first connection portion and the second connection portion is held;
A measuring unit for measuring a physical quantity in any one of the inside of the case and the surface of the case;
As a component of the terminal device, it is formed of a material that deforms in response to a temperature change, and includes a wire holding portion that changes to a shape that increases the contact pressure with the wire when the temperature exceeds a specified temperature. Wiring device to do. The terminal device is arranged so as to fit in a U-shaped terminal plate and a U-shaped portion of the terminal plate, and the electric wire is pressed against the terminal plate to electrically connect the terminal plate and the electric wire. A spring body,
The electric wire holding part includes the terminal plate,
The terminal plate is made of a material that deforms in response to a temperature change, and when the temperature exceeds a specified temperature, the terminal plate is deformed so that the inner dimensions of U-shaped portions on both sides of the spring body are reduced. Item 3. The wiring device according to Item 1 or 2. The terminal device is arranged so as to fit in a U-shaped terminal plate and a U-shaped portion of the terminal plate, and the electric wire is pressed against the terminal plate to electrically connect the terminal plate and the electric wire. A spring body,
The electric wire holding part includes the spring body,
The said spring body is formed with the material which deform | transforms according to a temperature change, and when it becomes more than normal temperature, it deform | transforms so that the space | interval with the said terminal board may become narrow. Wiring device. The terminal device is arranged so as to fit in a U-shaped terminal plate and a U-shaped portion of the terminal plate, and the electric wire is pressed against the terminal plate to electrically connect the terminal plate and the electric wire. A spring body, and a pressing body that is opposite to the electric wire with respect to the spring body and disposed between the spring body and the terminal plate,
The electric wire holding part includes the pressing body,
The said press body is formed with the material which deform | transforms according to a temperature change, and when it becomes more than a regulation temperature, it deform | transforms so that the said spring body may be pushed in the direction approaching the said electric wire, The Claim 1 or 2 characterized by the above-mentioned. The wiring apparatus as described.   The wiring device according to claim 3, wherein the measurement unit is provided in the terminal device. The measurement unit includes a force measurement unit that measures the magnitude of an external force applied to the spring body,
The wiring device according to claim 6, further comprising a determination unit that determines that an abnormality has occurred in the connection state of the electric wire when a measurement result of the force measurement unit is out of an allowable range. The measurement unit includes a force measurement unit that measures the magnitude of an external force applied to the spring body, and a temperature measurement unit that measures the temperature of the terminal device,
A determination unit for determining that the connection state of the electric wire is abnormal when the measurement result of the temperature measurement unit exceeds a temperature threshold after the measurement result of the force measurement unit is out of an allowable range; The wiring device according to claim 6.   The wiring device according to claim 7, further comprising a notifying unit that notifies the occurrence of an abnormality when the determining unit determines that the abnormality is present.   10. The device according to claim 7, further comprising: a blocking unit that electrically blocks between the first connection unit and the second connection unit when the determination unit determines that an abnormality has occurred. The wiring apparatus as described.   The wiring device according to claim 1, further comprising a transmission unit that transmits a measurement result of the measurement unit to an external device. The wiring device according to claim 11,
A data collection device that is installed in a distribution board that distributes power to the branch circuit to which the wiring device is connected, and that collects the measurement results of the measurement unit transmitted from the transmission unit;
A wiring system comprising: a management device that receives the measurement result of the measurement unit collected by the data collection device from the data collection device and manages the measurement result of the measurement unit.   The data collection device stores the wiring device and the branch breaker connected to the branch circuit to which the wiring device is connected in association with each other, and the measurement of the measurement unit transmitted from the transmission unit of the wiring device The wiring system according to claim 12, wherein the branch breaker associated with the wiring device is turned off based on a result.

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