JP6198115B2 - Electronic energy meter - Google Patents

Description

  The present invention relates to an electronic watt-hour meter configured to be able to transmit and receive externally.

  In recent years, electricity retailing has been liberalized due to amendments to the Energy Conservation Law, etc., and consumers have diversified contract menus (such as charge menus) for power supply for a single power generation provider, There is a strong demand for a multi-function electronic watt-hour meter that can handle the measurement (simultaneous same amount service) between power generation and supply companies.

  For example, electronic watt-hour meters with a communication function that converts the power measured by a watt-hour meter into a predetermined signal and sends and receives signals to and from a management device managed by a power generation provider are widespread Has been. As this type of electronic watt-hour meter, for example, a measurement display unit that measures and displays the power amount of a load, and data measured from the measurement display unit are received by optical communication, and the received data is received as a predetermined signal. It is well known that a communication device that converts to an external management device and performs transmission / reception is provided in the watt-hour meter body (see Patent Document 1). There are various communication methods of this communication apparatus, and it is required to support these communication methods.

  Therefore, it is conceivable to accommodate a plurality of communication devices in the housing of the electronic watt-hour meter. However, as described in Patent Document 2, there is an example in which the parent device (container) and the child device of the power measuring device are housed in a housing. However, this power measuring device has two child devices. It does not correspond to a structure that can accommodate two.

  In addition, when the watt-hour meter is used for power transactions or proof of its usage, the watt-hour meter must be certified by the Japan Electric Meters Certification Institute based on the Measurement Law, or it can be self-inspected by the designated manufacturer. Need to be done. The watt hour meter that has passed the test based on the measurement law or passed the self-inspection by the designated manufacturer is given a test label and a test label indicating the test expiration date. Further, the watt hour meter is given a verification seal. The verification seal adjusts the measuring instrument inside the watt hour meter, and after that, prevents it from being forcibly altered from the outside. The purpose of the verification seal is to make the watt-hour meters have the same accuracy so that there is no difference in the amount of power measured by each consumer. Further, after the watt hour meter is attached to the consumer, the watt hour meter is sealed with a power. The power seal is performed so that the watt-hour meter wiring or the like is not changed and illegal measurement is performed.

  For this reason, when the communication device is accommodated in the verification sealed section, it is necessary to receive the verification again every time it is replaced, and it cannot be easily replaced. On the other hand, if the communication device is housed in an unsealed section, it cannot be recognized even if the communication device is changed and illegal weighing is performed.

JP 2006-201028 A JP 2010-004346 A

  Therefore, in view of such circumstances, the present invention can easily replace two or more accommodated communication devices and can accommodate an electronic power accommodated so that it can be recognized that the communication devices have been illegally replaced. The problem is to provide a meter.

An electronic watt-hour meter according to the present invention includes a watt-hour meter body and a housing capable of housing the watt-hour meter body and a communication device, and the housing includes a first watt-hour meter body. And a second housing part in which two or more different communication devices are housed. The first housing part is first sealed by being sealed in a state where the watt-hour meter body is housed. sealed compartment is formed of the second housing portion, the first sealing compartment contains, and to form a second sealing section by more than one communication device is sealed in a can accommodate state The housing is a housing body having an opening into which the watt hour meter body and the communication device can be inserted, and the first space in which the watt hour meter body is accommodated and the second space in which the communication device is accommodated. A housing body having a space, an inner lid covering the first space of the housing body, and an outer lid covering the opening of the housing body, 1 of the housing portion is a first space, the second housing portion may include a first space and including a second space, a third space formed by the middle lid and the outer lid and It is characterized by.

According to this configuration, the communication device is accommodated in the second sealing section and is not accommodated in the first sealing section. Therefore, the two or more communication devices accommodated in the second accommodating portion can be removed by simply unsealing the second accommodating portion without unlocking the test seal. In addition, when removing a communication apparatus from a 2nd accommodating part, since it is necessary to release a seal | sticker from a 2nd accommodating part, the presence or absence of fraud can also be recognized by whether the seal | sticker is removed.
Some of the two or more communication devices can be accommodated in the second space formed in the housing body, and the remaining communication devices of the two or more communication devices are It can be accommodated in a third space formed between the lid and the outer lid. Therefore, it is possible to select whether to accommodate in the second space or the third space depending on the frequency of replacement of the communication device.

  Here, as one aspect of the electronic watt-hour meter according to the present invention, two or more communication devices have the same or substantially the same outer shape, and the second accommodating portion includes two or more communication devices. Two or more arrangement positions can be provided by abutting and positioning.

  According to such a configuration, the two or more communication devices are in contact with and positioned in the second housing portion regardless of the difference in the function related to communication with the outside in the watt hour meter main body, and two or more arrangement positions Any of the two or more communication devices are accommodated in the second accommodating portion.

  Here, as another aspect of the electronic watt-hour meter according to the present invention, each of the two or more communication devices has an engaging portion, and the second accommodating portion is engaged with the engaging portion. The engaging portion may include an engaged portion that positions two or more communication devices at the arrangement position.

  According to such a configuration, the two or more communication devices are positioned at the arrangement position of the second accommodating portion by engaging the engaging portion with the engaged portion of the second accommodating portion, and the second It can be accommodated in the accommodating portion.

  In this case, the engaging portion can be a linear protrusion, and the engaged portion can be a recess into which the protrusion fits.

  According to such a configuration, the two or more communication devices can be accommodated in the arrangement position of the second accommodation portion, with the linear protrusions fitted in the recesses, guided to the arrangement position of the second accommodation portion. It becomes like this.

  Here, as still another aspect of the electronic watt-hour meter according to the present invention, the inner lid or the housing main body has an insertion port for inserting the remaining portion into the second space while leaving a part of the communication device. The two or more communication devices may have a protrusion that is inserted into the second space from the insertion port and latches on the insertion port when positioned in the arrangement position.

  According to such a configuration, any one of the two or more communication devices is inserted into the second space from the insertion port, and the protrusion of the communication device is hooked at the insertion port of the inner lid or the housing body. Insertion into the insertion slot is restricted. Therefore, any of the two or more communication devices can be arranged at the arrangement position of the housing body.

  Here, as yet another aspect of the electronic watt-hour meter according to the present invention, the casing is an opening that opens downward, and has an opening into which the watt-hour main body can be inserted. And an inner lid that covers the first housing portion and an outer lid that covers the second housing portion, and the opening of the main body has an inner lid annular receiving portion that receives the inner lid over the entire circumference, A housing annular groove formed on the lid annular receiving portion, and a peripheral wall portion formed over the entire circumference on the outer side of the housing annular groove in the inner lid annular receiving portion. And an inner lid peripheral portion that contacts the inner cover annular receiving portion, and an inner cover annular protrusion that is formed to correspond to the casing annular groove when the inner lid peripheral portion contacts the intermediate cover annular receiving portion. Can have.

  According to such a configuration, the liquid dripping on the side surface of the housing main body is dropped on the peripheral wall portion of the housing main body, and therefore, the liquid can hardly reach the opening of the housing main body. Furthermore, the opening of the housing body is closed by bringing the inner lid peripheral edge of the inner lid into contact with the inner lid annular receiving portion. At that time, the housing annular groove of the housing main body and the inner lid annular protrusion of the inner lid are fitted together, and the gap between the housing main body and the inner lid becomes a convex shape in cross section, and the liquid is opened in the housing main body. It can be set as the structure which is hard to penetrate | invade in a 1st sealing division from a part.

  In this case, the inner lid has an outer lid annular receiving portion for receiving the outer lid, and an inner lid annular groove formed on the outer lid annular receiving portion, and the outer lid is a part of two or more communication devices. A cover that forms a second housing portion capable of housing the cover, an open end portion of the cover, and an outer lid annular protrusion formed on the open end portion corresponding to the inner lid annular groove be able to.

  According to such a configuration, the opening portion of the housing body is further closed by the outer lid annular receiving portion of the inner lid receiving the open end portion of the outer lid from the upper portion of the opening. At that time, the inner lid annular groove of the inner lid and the outer lid annular protrusion of the outer lid are fitted together, and the gap between the inner lid and the outer lid becomes a convex shape in cross-section, and the liquid is opened in the inner lid. Therefore, it is possible to make the structure difficult to enter the second sealed section.

  Here, as still another aspect of the electronic watt-hour meter according to the present invention, the housing includes a housing main body that can accommodate the watt-hour meter main body, an external terminal block attached to the housing main body, and the external terminal block. And a fixture for fixing the external terminal block to the wall surface, the housing body has a latching portion for latching the back surface to the fixture, A long support portion provided from the external terminal block to the rear surface of the housing main body, a base end portion fixed to the external terminal block, and a distal end portion hooked to the hooking portion of the housing main body. be able to.

  According to such a configuration, the external terminal block is fixed to the wall surface by the fixture, and the housing main body can be attached to the wall surface by hooking the latch portion on the back surface to the tip of the fixture. And the latching | locking part is provided in the back surface of the housing main body, and the housing main body can also be attached now to a fixture from the front side.

  As described above, according to the electronic watt-hour meter according to the present invention, it is possible to easily replace two or more accommodated communication devices and to recognize that the communication devices have been illegally replaced. There is an excellent effect of being housed.

FIG. 1 is an overall perspective view of an electronic watt-hour meter according to an embodiment of the present invention. FIG. 2 is a rear view of the electronic watt-hour meter according to the embodiment. FIG. 3 is a left side view of the electronic watt-hour meter according to the embodiment. FIG. 4 is an overall perspective view of the housing body of the electronic watt-hour meter according to the embodiment. FIG. 5 is an overall perspective view of the outer lid of the electronic watt-hour meter according to the embodiment. FIG. 6 is a top view of the outer lid of the electronic watt-hour meter according to the embodiment. FIG. 7 is an overall perspective view of the outer lid of the electronic watt-hour meter according to the embodiment, and is an overall perspective view of the outer lid in a state in which the communication device is accommodated. FIG. 8 is an overall perspective view of the inner lid of the electronic watt hour meter according to the embodiment, and is an overall perspective view of the inner lid in a state where the watt hour meter main body is attached. FIG. 9 is an overall perspective view of the watt hour measuring unit of the electronic watt hour meter according to the embodiment, and is an overall perspective view of the watt hour measuring unit in a state in which the communication device is accommodated. FIG. 10 is an enlarged cross-sectional view of the main part of the watt-hour meter measuring unit of the electronic watt-hour meter according to the embodiment, and is a cross-sectional view of the output terminal portion of the voltage / current measuring unit. FIG. 11 is an upper perspective view of the external terminal block of the electronic watt-hour meter according to the embodiment. FIG. 12 is a rear perspective view of the external terminal block of the electronic watt-hour meter according to the embodiment. FIG. 13: is a front view of the external terminal block of the electronic watt-hour meter which concerns on the same embodiment, Comprising: It is a front view of the external terminal block in the state to which the attaching part was fixed. FIG. 14 is a longitudinal cross-sectional view of the electronic watt-hour meter according to the embodiment, and is an enlarged cross-sectional view of a main part in which a connection portion of the housing body, the inner lid, and the outer lid is enlarged. FIG. 15 is an overall perspective view of the communication device of the electronic watt-hour meter according to the embodiment.

  Hereinafter, an embodiment of an electronic watt-hour meter according to the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 3, the electronic watt-hour meter 1 has a watt-hour meter body 2 (see FIG. 8) that measures the amount of power and a function related to communication with the outside in the watt-hour meter body 2. The communication apparatus 3 (refer FIG.7 and FIG.9) and the housing | casing 4 which can accommodate the watt-hour meter main body 2 and the communication apparatus 3 are provided.

  As shown in FIG. 8, the watt-hour meter main body 2 includes a voltage / current measuring unit 21 that measures voltage and current, a switch 22 that opens and closes based on an external command, and a measured value that is based on a voltage value and a current value. A display unit 23 for displaying the data, a CPU 24 (Central Processing Unit) for controlling the display unit 23 to display the measurement value, and a transmission / reception unit 25 for transmitting and receiving signals between the outside and the CPU 24. I have.

  The electronic watt-hour meter 1 according to the present embodiment includes a voltage / current measuring unit 21 and a switch 22, but the watt-hour meter main body in the present invention has an electronic function other than the communication function of the communication device 3. The power meter has a function related to power control, such as a power measurement function, an open / close function (shut-off / turn-on function), a notification / detection function, and a power information recording function.

  As shown in FIGS. 7, 9, and 15, the communication device 3 according to the present embodiment has a function related to communication with the outside (hereinafter, simply referred to as “power meter main body 2”). Communication devices 3 and 3 having different “communication functions”. The electronic watt-hour meter 1 according to the present embodiment corresponds to two or more types of communication devices 3 having different communication methods, or the same communication method and two or more communication devices 3. The communication method of the communication device 3 is any method such as wireless communication such as ZIGBEE (registered trademark), Wi-Fi, SUN (Smart Utility Networks), WiMAX, 3G, infrared communication, or power line carrier communication (PLC). Also targeted.

  Each communication device 3 has the same or substantially the same outer shape. As shown in FIG. 15, each communication device 3 includes a rectangular parallelepiped communication device main body 31 and a cable 32 having a connector terminal 33 that can be connected to a connector housing 25 a (see FIG. 9) included in the transmission / reception unit 25 at the tip. Have. A connector is constituted by the connector terminal 33 of the communication device 3 and the connector housing 25 a of the transmission / reception unit 25.

  Each communication device 3 is provided with an engaging portion 31a. As shown in FIG. 7, the outer lid 43 as the second accommodating portion 4B is engaged with the engaging portion 31a. It has an engaged portion 43g. The engaged portion 43g positions the communication device 3 at the arrangement position (second arrangement position). Specifically, the engaging portion 31a is a linear protrusion (protrusion), and the engaged portion 43g is a recess into which the protrusion fits. The concave portion guides the engaging portion 31a toward the arrangement position.

  As shown in FIG. 4, the housing 4 accommodates a first accommodating portion 4 </ b> A that accommodates the watt-hour meter main body 2, and two communication devices 3 and 3 as illustrated in FIGS. 4 and 5. And a second accommodating portion 4B. 4 A of 1st accommodating parts form a 1st sealing division by carrying out an examination seal in the state in which the watt-hour main body 2 is accommodated. The second accommodating portion 4B includes the first sealing section, and forms the second sealing section by being sealed (power) in a state where the two communication devices 3 and 3 can be accommodated.

  The 2nd accommodating part 4B has two or more arrangement positions arrange | positioned by contacting and positioning the two communication apparatuses 3. FIG. The housing 4 according to this embodiment has two arrangement positions. These two arrangement positions correspond to any of the communication apparatuses 3 and 3 exemplified here. However, these two arrangement positions are other communication devices having other communication functions different from the communication functions of the illustrated communication devices 3 and 3, and are the same as or substantially the same as the illustrated communication devices 3 and 3. Other communication devices having the same external shape are also supported. That is, these two arrangement positions correspond to all communication apparatuses having the same or substantially the same outer shape as the illustrated communication apparatuses 3 and 3, not the arrangement positions dedicated to the illustrated communication apparatuses 3 and 3.

  Specifically, as shown in FIGS. 1 to 3, the housing 4 includes a housing body 41 having an opening 41 a (see FIG. 4) into which the watt hour meter body 2 and the communication device 3 can be inserted. An inner lid 42 (see FIG. 9) for partitioning the housing body 41, an outer lid 43 covering the opening 41 a of the housing body 41, an external terminal block 44 attached to the housing body 41, and the external terminal block 44 And an attachment 45 to be connected.

  As shown in FIG. 4, the housing main body 41 has a first space S1 in which the watt-hour meter main body 2 is accommodated and a second space S2 in which one communication device 3 is accommodated. Further, as shown in FIG. 5, the third space S <b> 3 is formed by the inner lid 42 and the outer lid 43. The inner lid 42 closes the first space S1 of the housing body 41. The outer lid 43 closes the second space S2 of the housing body 41. The first space S1 serves as the first housing portion 4A, and the second space S2 and the third space S3 serve as the second housing portion 4B. One of the arrangement positions of the two communication devices 3 is provided in the second space S2, and the other is provided in the third space S3.

  As shown in FIG. 4, in addition to the opening 41a, the casing main body 41 is opened downward, and a display window 41b for visually recognizing the display unit 23 provided inside, and a housing. An insertion hole (not shown) for inserting a sealing fitting 41c (see FIG. 1) for sealing the body main body 41 and the inner lid 42 is provided. The sealing metal fitting 41c here performs an inspection seal.

  Inside the housing body 41, an engaging claw 41d for connecting the inner lid 42 to the opening 41a and a partition 41e for accommodating the communication device 3 are provided. The engaging claw 41 d is fitted into an engaged portion 42 h (see FIG. 8) of the inner lid 42 described later, and connects the inner lid 42 to the opening 41 a of the housing body 41. The partition portion 41 e is arranged so as to surround the surface along the longitudinal direction of the communication device 3 together with the inner peripheral surface of the housing body 41.

  As shown in FIGS. 1 and 3, a plurality of grooves 41 f are provided on the outer side of the casing main body 41 continuously from the upper ends of both side surfaces to reinforce the casing main body 41. When a person grips the housing body 41 from the front side, it is provided so that a finger can be applied. Moreover, the length which extends below is formed short, and the width | variety is formed wide, so that the thing of the front side among several groove | channels 41f is formed. And the thing extended below is formed so that the thing of the back side is long, and the width | variety is formed narrowly. In addition, by forming a plurality of grooves 41 f in the housing body 41, a convex portion having a corresponding shape is formed inside the housing body 41, and is also used for positioning the watthour meter body 2.

  As shown in FIGS. 2 and 4, on the back side of the housing body 41, there are mounting grooves 41g for mounting the mounting tool 45 continuously from the upper part to the lower end, and a hooking hole (see FIG. (Not shown). The attachment groove 41g functions as a guide for guiding the attachment tool 45 when the attachment tool 45 is attached to the latching portion 41h of the housing body 41. The latching portion 41 h latches the housing body 41 by inserting the tip 45 c of the fixture 45 into the latching hole.

  As shown in FIG. 14, the opening 41a of the housing main body 41 includes an inner lid annular receiving portion 41k that receives the inner lid 42 over the entire circumference, and an annular casing formed on the inner lid annular receiving portion 41k. A groove 41m and a peripheral wall portion 41n formed over the entire circumference outside the housing annular groove 41m in the inner lid annular receiving portion 41k.

  The opening 41a of the housing body 41 has a step formed inside by an inner lid annular receiving portion 41k and a peripheral wall portion 41n. The inner lid annular receiving portion 41k is a surface parallel to the peripheral edge of the inner lid 42 so that the inner lid 42 does not fall into the housing body 41. The casing annular groove 41m is formed over the entire circumference of the inner lid annular receiving portion 41k, and is recessed in a direction orthogonal to the inner lid annular receiving portion 41k. The peripheral wall portion 41n is formed by extending the outer peripheral edge portion of the inner lid annular receiving portion 41k downward, and surrounds the outer periphery of the inner lid 42 that contacts the inner lid annular receiving portion 41k.

  As shown in FIGS. 8 and 14, the inner lid 42 includes an inner lid body 42 a that closes the opening 41 a of the housing body 41, an inner lid peripheral portion 42 b that abuts on the inner lid annular receiving portion 41 k, and the inner lid An inner lid annular protrusion 42c formed corresponding to the casing annular groove 41m when the peripheral edge 42b abuts against the inner lid annular receptacle 41k, an outer lid annular receptacle 42d that receives the outer lid 43, And an inner lid annular groove 42e formed on the lid annular receiving portion 42d.

  As shown in FIGS. 8 and 9, the inner lid main body 42 a has a concave shape that enters the inside of the housing main body 41. The connector connection opening 42 f that penetrates the bottom surface of the inner lid main body 42 a and the housing main body 41. A communication device insertion opening 42g connected to the second space S2 partitioned by the partition portion 41e, an engaged portion 42h engaged with the engagement claw 41d of the housing body 41, and the watt-hour meter body 2 are attached. Connecting member 42k for connecting the external terminal block 44 to the external terminal block 44 and the external terminal block 44 for connecting the external terminal block 44 to the external terminal block 44. 42n.

  The connector connection opening 42f is provided to connect the connector terminal 33 of the communication device main body 31 to the connector housing 25a provided inside the housing main body 41, and penetrates the portion of the inner lid main body 42a facing the connector housing 25a. It is an opening.

  The communication device insertion opening 42g is an opening that penetrates a portion of the inner lid main body 42a facing the second space S2 in order to insert the communication device 3 in the longitudinal direction. The communication device insertion opening 42g has an engaging portion 31a provided along a direction orthogonal to the longitudinal direction of the communication device main body 31 of the communication device 3 when the communication device 3 is inserted into the second space S2. The contact depth regulates the insertion depth of the communication device 3 in the longitudinal direction. The communication device insertion opening 42g is provided with a latching claw (not shown). When the engaging portion 31a comes into contact with the communication device insertion opening 42g, the communication device insertion opening 42g is simultaneously latched on the latching claw. Thus, the communication device 3 is prevented from coming off from the communication device insertion opening 42g.

  As shown in FIG. 10, the external terminal 42m has a structure in which a current terminal for supplying a test current and a test voltage during a test and a voltage terminal 21a are superposed on the main circuit terminal 21b. The current terminal and voltage terminal 21a are long metal plates having conductivity, and have a bent portion 21c in the middle in the longitudinal direction. The current terminal and voltage terminal 21a are output terminals that act as leaf springs. The proximal end side of the bent portion 21c of the current terminal and voltage terminal 21a is connected to the main body of the voltage / current measuring portion, and the distal end side is arranged on an extension line at the center of the through hole 21d provided in the main circuit terminal 21b. ing. A separating insertion hole 42q is provided at the position of the inner lid 42 on a straight line connecting the hole center of the through hole 21d of the main circuit terminal 21b and the tip of the current terminal and the voltage terminal 21a.

  The separation insertion hole 42q is a hole for inserting an insulated rod-shaped operation tool, and the operation tool inserted into the separation insertion hole 42q passes through the through hole 21d of the main circuit terminal 21b, and is connected to the current terminal and the voltage. The bent portion 21c is bent in contact with the distal end portion of the terminal 21a, and the current terminal and the voltage terminal 21a are separated from the connected main circuit terminal 21b and separated. On the other hand, when the operation tool is pulled out and pulled out from the insertion hole 42q, the posture of the current terminal and the voltage terminal 21a is restored, and the current terminal and the voltage terminal 21a are connected to the main circuit terminal 21b again.

  As shown in FIGS. 5 to 7, the outer lid 43 includes a cover 43 a that forms a second accommodating portion 4 </ b> B that can accommodate one communication device 3, an open end 43 b of the cover 43 a, and an inner lid annular shape An outer lid annular protrusion 43c (see FIG. 14) formed on the open end 43b corresponding to the groove 42e. The cover 43a is open at the top and is formed in a substantially rectangular shape. And the cover 43a forms the space of the convex shape in the downward direction where the both ends side of the width direction is shallow and the center part is deep inside. An arrangement position is formed at the center, and the communication device 3 is arranged at the arrangement position.

  The cover 43 a covers the front side of the external terminal block 44 by arranging the external terminal block 44 on the back side. As shown in FIGS. 5 and 7, the cover 43a is provided to face the external terminal block 44, and has a back wall 43d that partitions the external terminal block 44 and the third space S3 inside the cover 43a. . The communication device 3 is disposed between the front wall 43e on the front side and the back wall 43d. The cover 43a is a surface that is orthogonal to the longitudinal direction of the communication device 3 and has a wide first surface 31b (see FIG. 15) opposed to the bottom surface, and is a surface that is orthogonal to the longitudinal direction and has a narrow width. 31c (refer FIG. 15) is accommodated so as to oppose the front wall part 43e or the back wall part 43d. The communication device 3 is arranged so that the surface with the cable lead-out hole 31d faces upward.

  As shown in FIGS. 5 to 7, the cover 43 a is provided with an engaged portion 43 g on the inner surfaces of the back wall portion 43 d and the front wall portion 43 e facing each other. The engaged portion 43g is provided along the vertical direction. By fitting the engaging portion 31a of the communication device 3 on the engaged portion 43g and sliding the communication device 3 in the vertical direction, the communication device 3 can be positioned in the longitudinal direction. A first protrusion 43h that supports the first surface 31b of the communication device 3 is provided on the bottom surface, and the first protrusion 43h protrudes in a direction orthogonal to the bottom surface, that is, protrudes upward. Yes. Moreover, the 2nd protrusion 43k which supports the 2nd surface 31c of the communication apparatus 3 is also provided in the front side, and the 2nd protrusion 43k protrudes in the direction orthogonal to the front wall part 43e. The rear wall 43d has a latch piece 43m at the upper end and engages with the first surface 31b of the communication device 3 accommodated in the cover 43a. The communication device 3 can be removed from the arrangement position by warping the latch piece 43m to the back side.

  As shown in FIGS. 5 to 7, a terminal block cover portion 43n that covers the front surface of the external terminal block 44 is provided on the back side of the cover 43a, and the terminal block cover portion 43n includes a back wall portion 43d, It is formed by an extended wall portion 43p extended in the width direction from the back wall portion 43d. The expansion wall 43p is provided with a through-hole 43r into which the sealing bolt 43q is screwed and a fastening protrusion 43t having an insertion hole through which the fastening member 43s is inserted. The fastening member 43s is for fastening the sealing bolt 43q and the fastening projection 43t, and is passed through the through hole in the head of the sealing bolt 43q and the insertion hole in which the fastening projection 43t is provided. And concluded.

  As shown in FIGS. 11 to 13, the external terminal block 44 is formed in a vertical direction so that a plurality of terminals 44 a arranged in the width direction and ends of the electric wires are inserted and connected to the respective terminals 44 a. A connection hole 44b and a base 44c for insulating and protecting the terminal 44a are provided.

  The terminal 44a is electrically connected to an external terminal 42m provided in the watthour meter main body 2. That is, one end side of the terminal 44a has an insertion hole into which an end of an electric wire inserted from the connection hole 44b can be inserted, and a bolt tightening capable of tightening the tightening bolt 44d from a direction orthogonal to the insertion hole. The end of the electric wire inserted into the insertion hole is fixed at the tip of the tightening bolt 44d inserted from the bolt tightening hole 44e. The other end side of the terminal 44a has a bolt connection hole 44f and is screwed to the external terminal 42m of the watt-hour meter body 2.

  The base 44c is a fitting portion 44k into which a fixing hole 44g penetrating in the front-rear direction, a sealing hole 44h for screwing the sealing bolt 43q, and a connecting member 42n having a through hole 42p (see FIG. 8) are fitted. And a connection hole 44n formed with a female screw for screwing the connection bolt 44m inserted through the through hole 42p of the connection member 42n fitted in the fitting portion 44k.

  As shown in FIGS. 2 and 13, the fixture 45 fixes the external terminal block 44 to the wall surface. The attachment 45 includes a long support portion 45 a provided from the external terminal block 44 to the back surface of the housing body 41, a base end portion 45 b fixed to the external terminal block 44, and a latching portion of the housing body 41. It has the front-end | tip part 45c latched on 41h, and the latching | locking part 45d latched on the protrusion-shaped latch provided in the wall surface.

  The support 45a is provided with ribs 45e formed by folding back in the width direction for reinforcement, and supports the weight of the entire electronic watt-hour meter 1. The base end portion 45b has a hole 45f provided on the base end side of the support portion 45a, and a protrusion 44p provided on the back surface of the external terminal block 44 is inserted into the hole 45f and fixed.

  The tip portion 45c is formed in a claw-like shape on the tip side of the support portion 45a, and a first piece 45g provided to protrude to the front side with respect to the support portion 45a, and a tip side of the first piece 45g And a second piece 45h provided to project upward. The first piece 45g protrudes in a substantially horizontal direction, and the second piece 45h protrudes in a substantially vertical direction.

  The latching portion 45d includes a latching portion lower portion 45k provided to project to the back side with respect to the support portion 45a, a latching portion upper portion 45m provided to project upward from the latching portion lower portion 45k, and a latching tool. 45n of retaining holes to be inserted. The hooking portion lower portion 45k may be configured such that the hooking portion upper portion 45m is separated from the back surface of the housing body 41 and the head of the hooking device is hung between the hooking portion lower portion 45k and the housing body 41. become able to. The hooking hole 45n is provided in the hooking part upper part 45m and reaches the hooking part lower part 45k. The upper portion of the latching hole 45n is narrowed, and the head of the latching tool is prevented from coming off.

  As described above, according to the electronic watt-hour meter 1 of the present embodiment, the communication devices 3 and 3 are accommodated in the second sealing section, and the first sealing section that is the first space S1. Is not housed. For this reason, the two communication devices 3 and 3 accommodated in the second accommodating portion 4B can be removed simply by unlocking the second accommodating portion 4B without unlocking the verification seal. In addition, when removing the communication apparatus 3 from the 2nd accommodating part 4B, since it is necessary to open a seal | sticker from the 2nd accommodating part 4B, the presence or absence of fraud may also be recognized by whether the seal | sticker is removed. it can.

  In addition, the two communication devices 3 and 3 are in contact with and positioned at the second accommodating portion 4B regardless of the difference in the function related to communication with the outside in the watt-hour main body 2, and two or more arrangement positions are provided. Any one of the two communication devices 3 and 3 is accommodated in the second accommodating portion 4B. That is, of the two communication devices 3 and 3, one communication device 3 is accommodated in the second space S <b> 2 by being arranged at the arrangement position of the housing body 41, and the other communication device 3 is By being arranged at the arrangement position of the outer lid 43, it is accommodated in the third space S3.

  In addition, one communication device 3 of the two communication devices 3 and 3 can be accommodated in the second space S2 formed in the housing body 41, and the remaining communication of the two communication devices 3 and 3 can be performed. The device 3 can be accommodated in a third space S3 formed between the inner lid 42 and the outer lid 43. Therefore, whether to accommodate in the second space S2 or the third space S3 can be selected depending on the replacement frequency of the communication device 3 or the like. Specifically, in the case of the third space S3, the communication device 3 is separated from the housing body 41 together with the outer lid 43 just by removing the outer lid 43 from the housing body 41, and the watt-hour meter by removing the connector. It can be removed from the main body 2. On the other hand, in the case of the second space S <b> 2, the outer lid 43 can be taken out from the casing body 41 only after it is removed from the casing body 41. Therefore, the communication device 3 with a low frequency of taking out can be accommodated in the second space S2, and the communication device 3 with a high frequency of removal can be accommodated in the third space S3.

  In addition, the two communication devices 3 and 3 are configured so that the engaging portion 31a is engaged with the engaged portion 43g of the outer lid 43 that constitutes the second accommodating portion 4B, thereby disposing the second accommodating portion 4B. So that it can be accommodated in the second accommodating portion 4B.

  Specifically, in the two communication devices 3 and 3, the linear protrusion of the engaging portion 31a fits into the concave portion of the engaged portion 43g, and is guided to the arrangement position of the second accommodating portion 4B. Can be accommodated at the arrangement position of the accommodating portion 4B.

  One of the two communication devices 3 and 3 is inserted into the second space S2 from the communication device insertion opening 42g (insertion port), and the protrusion of the engaging portion 31a of the communication device 3 communicates with the inner lid 42. It is latched by the device insertion opening 42g, and the insertion of the communication device 3 into the communication device insertion opening 42g is restricted. Therefore, one of the two communication devices 3 and 3 can be arranged at the arrangement position of the housing main body 41.

  Further, the liquid dripping on the side surface of the casing body 41 is dropped at the peripheral wall portion 41 n of the casing body 41, and thus the liquid can hardly reach the opening 41 a of the casing body 41. Further, the opening 41a of the housing body 41 is closed by bringing the inner lid peripheral portion 42b of the inner lid 42 into contact with the inner lid annular receiving portion 41k. At that time, the casing annular groove 41m of the casing body 41 and the inner lid annular protrusion 42c of the inner lid 42 are fitted to each other, and the gap between the casing body 41 and the inner lid 42 is convex in a sectional view. A labyrinth structure in which liquid does not easily enter the first sealed compartment from the opening 41a of the housing body 41 can be obtained.

  Further, the opening 41a of the housing body 41 is further blocked by the outer lid annular receiving portion 42d of the inner lid 42 receiving the open end 43b of the outer lid 43 from above the opening 41a of the casing main body 41. . At that time, the inner lid annular groove 42e of the inner lid 42 and the outer lid annular protrusion 43c of the outer lid 43 are fitted to each other, and the gap between the inner lid 42 and the outer lid 43 becomes a convex shape in cross section. However, a labyrinth structure that does not easily enter the second sealed section from the opening of the inner lid 42 can be obtained.

  That is, even if a sealing member such as an O-ring or a gasket is not provided, these labyrinth structures seal the first space S1 to the third space S3.

  Further, the external terminal block 44 is fixed to the wall surface by a fixture 45. Further, the external terminal block 44 can be fixed by being inserted into the fixing hole 44g and screwed into the wall surface. The housing main body 41 can be attached to the wall surface by hooking a hook 41 h on the back to the tip of the fixture 45. In addition, the latching portion 41 h is provided on the back surface of the housing body 41, and the housing body 41 can be attached to the fixture 45 from the front side. Then, the connecting member 42n of the inner lid 42 is fitted into the fitting portion 44k from above the external terminal block 44, and the connecting bolt is screwed into the through hole 42p, so that the housing main body 41, the inner lid 42, and the watt hour meter main body 2 are engaged. The watt-hour meter measuring unit can be connected to the external terminal block 44. One communication device 3 of the two communication devices 3 and 3 is inserted into the arrangement position in the housing body 41 from this attached state, and the other communication device 3 is arranged in the cover 43 a of the outer lid 43. The outer lid 43 can be attached to the housing main body 41 while being accommodated in the position. In particular, when the electronic watt-hour meter 1 is housed in the meter box, the watt-hour meter measuring unit is housed from the front side in the meter box and taken out from the front side, so that the watt-hour meter measuring unit is housed. At this time, it is not necessary to secure a large maintenance space above the electronic watt-hour meter 1, and the watt-hour meter can be easily replaced. Further, since the external terminal block 44 is fixed to the instrument box, its mounting position does not change after replacement of the watt-hour meter measuring unit.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  The electronic watt-hour meter 1 according to the present embodiment describes an example in which the watt hour meter main body 2 is accommodated in the first accommodating portion 4A and the two communication devices 3 and 3 are accommodated in the second accommodating portion 4B. However, the present invention is not limited to this. For example, a part of the watt-hour meter main body that does not require verification may be accommodated in the second accommodating portion.

  The electronic watt-hour meter 1 according to the present embodiment has been described as an example in which power sealing is performed in a state where the two communication devices 3 and 3 are accommodated in the second sealing section, but is not limited thereto. . For example, two communication devices 3 and 3 can be accommodated, but two communication devices 3 and 3 are not accommodated, and one communication device 3 is accommodated, or one communication device 3 is also accommodated. The present invention can also be applied to the case where the power is sealed in a state where it is not.

  In the electronic watt-hour meter 1 according to the present embodiment, the example in which the outer lid 43 is removed from the housing body 41 and the external terminal block 44 before the housing body 41 is removed from the external terminal block 44 has been described. Is not to be done. For example, the outer lid may be configured to be removed from the external terminal block together with the housing main body, and thereafter the outer lid may be removed from the housing main body. In this case, after the communication device accommodated in the outer lid has been removed from the outer lid, move it to a safe place (such as on a desk or the ground) that will not be damaged, and then remove the outer lid from the chassis body. It can be removed. That is, when the outer lid is removed from the housing main body, the communication device accommodated in the outer lid is also separated from the housing main body, but the watt-hour meter main body accommodated in the housing main body and the communication device are connected by a cable. The place where the outer lid is removed from the casing main body can be moved so that the communication apparatus separated from the casing main body is pulled by the cable and falls off the outer lid, and the communication apparatus does not hang in the air.

  Although the electronic watt-hour meter 1 according to the present embodiment has been described with an example in which a communication device is attached, the present invention is not limited to this. For example, when a communication device is sold without being attached to an electronic watt hour meter and is used in a state where communication between the outside and the electronic watt hour meter is not performed, the usage status of the power user thereafter The present invention includes a case where the communication device is attached to the electronic watt-hour meter and communicates with the outside.

  DESCRIPTION OF SYMBOLS 1 ... Electronic watt-hour meter, 2 ... Electricity meter main body, 21 ... Voltage / current measuring part, 21a ... Current terminal, voltage terminal, 21b ... Main circuit terminal, 21c ... Bending part, 21d ... Through-hole, 22 ... Switch, 23 ... Display unit, 24 ... CPU, 25 ... Transmission / reception unit, 25a ... Connector housing (connector), 3 ... Communication device, 31 ... Communication device body, 31a ... Engagement unit, 31b ... First surface, 32c ... 2nd surface, 31d ... cable lead-out hole, 32 ... cable, 33 ... connector terminal (connector), 4 ... housing, 41 ... housing body, 41a ... opening, 41b ... display window, 41c ... sealing metal fitting, 41d ... engagement Claw, 41e ... partitioning part, 41f ... groove, 41g ... mounting groove, 41h ... latching part, 41k ... inner lid annular receiving part, 41m ... casing annular groove, 41n ... peripheral wall part, 42 ... inner lid, 42a ... middle Lid main body, 42b ... peripheral edge of inner lid, 4 c: inner lid annular protrusion, 42d: outer lid annular receiving portion, 42e: inner lid annular groove, 42f: connector connection opening, 42g: communication device insertion opening, 42h: engaged portion, 42k: mounting member, 42m ... external terminal, 42n ... connecting member, 42p ... through hole, 42q ... detaching insertion hole, 43 ... outer lid, 43a ... cover, 43b ... open end, 43c ... outer ring annular protrusion, 43d ... back wall portion 43e ... front wall, 43g ... engaged portion, 43h ... first projection, 43k ... second projection, 43m ... latching piece, 43n ... terminal block cover, 43p ... expansion wall, 43q ... sealing bolt , 43r ... through hole, 43s ... fastening member, 43t ... fastening projection, 44 ... external terminal block, 44a ... terminal, 44b ... connection hole, 44c ... base, 44d ... fastening bolt, 44e ... bolt fastening hole 44f: Bolt connection hole, 44g: For fixing , 44h ... sealing hole, 44k ... fitting portion, 44m ... connection bolt, 44n ... connection hole, 44p ... projection, 45 ... fixture, 45a ... support portion, 45b ... base end portion, 45c ... tip end portion, 45d ... Latching part, 45e ... rib, 45f ... hole, 45g ... first piece, 45h ... second piece, 45k ... hanging part lower part, 45m ... hanging part upper part, 45n ... hanging hole, 4A ... first accommodation Part, 4B ... second housing part, S1 ... first space, S2 ... second space, S3 ... third space

Claims (8)

An watt-hour meter body, and a housing capable of housing the watt-hour meter body and the communication device,
The housing includes a first accommodating portion in which the watt-hour meter main body is accommodated and a second accommodating portion in which two or more different communication devices are accommodated.
The first accommodating portion forms a first sealed section by being sealed with the watt-hour meter being accommodated,
The second storage section includes the first sealing section, and forms a second sealing section by being sealed in a state in which the two or more communication devices can be stored.
The housing is a housing body having an opening into which the watt-hour meter body and the communication device can be inserted, and the first space in which the watt-hour meter body is housed and the communication device are housed. A housing body having a second space, an inner lid that covers the first space of the housing body, and an outer lid that covers the opening of the housing body,
The first accommodating portion is the first space,
The second accommodating portion includes the first space and the second space, and includes a third space formed by the inner lid and the outer lid. Total. The two or more communication devices have the same or substantially the same outer shape,
The electronic watt-hour meter according to claim 1, wherein the second accommodating portion has two or more arrangement positions at which the two or more communication devices are arranged by contacting and positioning. Each of the two or more communication devices has an engaging portion,
It said second housing portion is a engaged portion to be engaged with the engaging portion, claim 1 or 2 having the engaged portion positioning the two or more communication devices to the position The electronic watt-hour meter according to any one of the above. The engaging portion is a linear protrusion,
The electronic watt-hour meter according to claim 3 , wherein the engaged portion is a recess into which the protrusion is fitted. The inner lid or the housing body has an insertion port for leaving a part of the communication device and inserting the remaining part into the second space,
Said two or more communication devices, according to claim 3 or claim 4 having a projection for engaging in the insertion opening when located at the position inserted into the second space from the insertion port Electronic energy meter. The housing is an opening that opens downward, and includes a housing body that has an opening into which the watt hour meter body can be inserted, an inner lid that covers the first housing portion, An outer lid that covers the housing portion of 2,
The opening of the housing body includes an inner lid annular receiving portion that receives the inner lid over the entire circumference, an annular housing groove formed on the inner lid annular receiving portion, and the inner lid annular receiving portion. And a peripheral wall portion formed over the entire circumference of the casing annular groove in
The inner lid corresponds to the inner lid main body, the inner lid peripheral edge abutting on the inner lid annular receiver, and the casing annular groove when the inner lid peripheral edge abuts on the inner lid annular receiver. The electronic watt-hour meter according to any one of claims 1 to 5 , further comprising an inner lid annular protrusion formed. The inner lid has an outer lid annular receiving portion for receiving the outer lid, and an inner lid annular groove formed on the outer lid annular receiving portion,
The outer lid is configured to correspond to the cover that forms the second accommodating portion capable of accommodating a part of the two or more communication devices, the open end of the cover, and the inner lid annular groove. The electronic watt-hour meter according to claim 6 , further comprising an outer lid annular protrusion formed on the end. The casing is a casing main body that can accommodate the watt-hour meter main body, an external terminal block that is attached to the housing main body, and a fixture that is connected to the external terminal block, and the external terminal block is attached to the wall surface. And a fixture for fixing to the
The housing body has a latching portion for latching the back surface to the fixture,
The fixture includes an elongated support portion provided from the external terminal block to the back surface of the housing body, a base end portion fixed to the external terminal block, and a latching portion on the latching portion of the housing body. The electronic watt-hour meter of any one of Claims 1 thru | or 7 .

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