JP5524784B2 - Detachment device for electronic watt-hour meter unit - Google Patents

Description

  The present invention relates to an attachment / detachment device for attaching / detaching a unit to / from a unit case of an electronic watt-hour meter having a socket structure.

  Conventionally, a unit-type electronic watt-hour meter is known as a watt-hour meter for measuring the amount of power used by consumers (for example, Patent Document 1).

  The electronic watt-hour meter of Patent Document 1 is configured by mounting a communication terminal unit 102, a watt-hour meter unit 103, and a switch unit 104 on a unit joint portion 101 with a socket structure. In addition, each of the units 102, 103, and 104 is fixed with screws by aligning the screw hole flange portion 105 with the screw hole portion 106 of the unit joint portion 101 (see FIGS. 11 and 12).

Japanese Patent Laying-Open No. 2006-170787 (paragraph numbers 0025 and 0042, FIGS. 1 and 5)

  By the way, it is necessary to replace each unit according to its service life, and when replacing the unit, with the unit fixing screw completely loosened, engage each unit with an insulator tool, etc. Then, it is pulled out from the unit joint.

  However, when the unit is pulled out by using a tool, if the pulling force acts eccentrically, the unit may be tilted and the pin of the unit to be removed and the socket of the unit joint may be destroyed. In addition, at the moment when the unit is detached, it is necessary to hold the unit while holding the tool, and since the work is often performed on a stepladder or the like, the removed unit may be dropped.

  Further, since an electronic watt-hour meter is often installed on a vertical wall surface, it is necessary to apply a certain amount of force in the horizontal direction where it is difficult to apply a force in order to attach and detach the unit. Moreover, since it is impossible to apply an impact to each unit, it is not possible to use a hammer or the like, and it is difficult to attach or detach the unit.

  An object of the present invention is to provide an electronic watt-hour unit attachment / detachment device that can be reliably attached / detached while preventing damage or dropping of the unit.

  To achieve the above object, an electronic watt-hour unit attachment / detachment apparatus according to the present invention is for attaching / detaching a unit to / from a unit case of an electronic watt-hour meter having a socket structure. A column, a fixing means for fixing the column to the unit case, a pulling hook that can be locked to the locking portion of the unit, and a pulling hook moving unit that moves the pulling hook in the direction of the central axis of the column. A pressing plate that pushes the unit into the unit case, and a guide plate that can be disposed on the support column at a position adjacent to the unit and its thickness direction, and a spring that biases the unit into the unit case. And the presser plate is provided integrally with the pull-out hook.

  According to the above configuration, since the guide plate can be disposed adjacent to the unit, when the unit is pulled out, the guide plate can prevent the unit from falling due to eccentricity of the pulling force. Further, when setting the attachment / detachment device, the attachment / detachment device can be positioned along the guide plate along the unit, and the guide plate and the pull-out hook can cooperate to hold the attachment / detachment unit.

  In addition, a presser plate that pushes the unit into the unit case is provided, and this presser plate and pull-out hook are provided integrally.When the unit is mounted, the unit is pushed in with the presser plate, and when the unit is removed, The unit can be pulled out, and one detachable device can be used both for pushing and pulling the unit.

  Furthermore, since the spring urges the unit in the direction of pushing the unit case, the pull-out hook can be more strongly locked to the locking portion of the unit, and the unit can be securely held so as to be integrated with the attachment / detachment device. The unit can be prevented from falling. In other words, for example, a thin unit tends to be rattled even if it is held by the guide plate and the pull-out hook. However, the unit is pulled out by pulling out the unit by being biased by a spring. Therefore, even a thin unit can be held without rattling.

  Further, the guide plate is provided with a window hole for visually recognizing the presser plate, and a scale indicating the position of the presser plate in the central axis direction of the support column is provided at a side edge of the window hole. A configuration characterized by the above can also be adopted.

  According to this structure, the presser plate visually recognized from the window hole of a guide plate can be positioned according to the scale of the side edge part of a window hole. As a result, even if there are multiple types of electronic watt-hour meters, the position of the presser plate can be set according to the type, and multiple types of electronic watt-hour meters can be set using a common attachment / detachment device. The unit can be attached to and detached from the watt-hour meter.

  Further, with respect to the pulling hook moving means for moving the pulling hook, it is possible to adopt a configuration characterized in that the pulling hook moving means is a gear mechanism.

  According to this configuration, for example, two pull-out hooks provided on both sides in the width direction of the gate-shaped column can be moved simultaneously in conjunction with a simple mechanism, and the pull-out hooks are locked on both sides in the width direction of the unit. It can be pulled out stably. The pulling hook moving means may be any lever, chain, belt, link mechanism, etc., and each pulling hook or a plurality of pulling hooks may be linked. Can be moved.

  The fixing means includes a front end edge of the support column that contacts the opening edge of the unit case, an insertion plate portion that protrudes from the front end portion of the support column so as to be inserted inside the opening of the unit case, and an outward direction from the opening edge of the unit case. It is also possible to adopt a configuration characterized by comprising a fixed claw that can be locked to a ridge that protrudes into the frame.

  According to this structure, a support | pillar can be reliably fixed to a unit case by three-way fastening of the front-end edge of a support | pillar, an insertion board part, and a fixing nail | claw.

  Further, the pull-out hook is provided so as to be swingable with respect to the support column, and is elastically biased in a direction to be locked in the locking portion of the unit, and is pushed into the pull-out hook toward the locking portion. Accordingly, it is also possible to employ a configuration in which an inclined surface is formed that slides against the locking portion and swings the pull-out hook against an urging force.

  According to this configuration, the swingable pull-out hook is elastically biased and the inclined surface is formed on the pull-out hook. Therefore, the pull-out hook is temporarily biased with the sliding of the inclined surface with respect to the locking portion. After rocking against this, it is locked to the locking portion by the urging force. As a result, the pull-out hook can be automatically locked to the locking portion by simply pushing it straight into the unit case without mounting the tilting device, and the locking state is maintained by the biasing force. be able to.

  In addition, the support column is formed in a portal shape formed by hinge-connecting a stand to both sides of the main body base, and the guide plate and the stand are arranged so that the distance between the front ends of both stands can be adjusted within a predetermined range. A configuration in which a long hole is formed on one side and a protrusion inserted into the long hole is provided on the other side can also be adopted.

  According to this configuration, since the elongated hole is formed in one of the guide plate and the stand and the protrusion provided on the other is inserted, both stands are moved to the main body base while moving the protrusion in the long diameter direction of the elongated hole. And the hinge coupling portion can be swung as a swing shaft. This makes it possible to adjust the distance between the tips of both stands according to the width of the unit case, so that one type of attachment / detachment device can be attached to and detached from multiple types of unit cases of different sizes. Can be used.

  Further, the unit case is accommodated in a container-like box body whose front side of an electronic watt-hour meter box is opened, and the support column is set to a size that can accommodate both side stands in the box body. A configuration characterized by the above can also be adopted.

  According to this configuration, since the stands on both sides of the support are set to a size that can be accommodated in the box body, it is possible to prevent the box outside the unit case from interfering with the installation of the detachable device. Here, in order to set the stand on both sides of the column to a size that can be accommodated in the box body, the distance between the outer surfaces of both stands may be set smaller than the width between the inner surfaces of the box body, and further, the outer surface of the stand When there is a projection for operating the attachment / detachment device, the position of the projection for operation may be provided at a position higher than the depth of the box body.

  As described above, according to the present invention, the gate-shaped support fixed to the unit case is provided with the guide plate that can be disposed at a position adjacent to the unit. As a result, the guide plate can position the attachment / detachment device and prevent damage due to the tilting of the unit, and the guide plate and the pull-out hook cooperate to hold the unit. The unit can be securely attached and detached while preventing falling.

The perspective view of the attachment or detachment apparatus of the unit for electronic watt-hour meters which concerns on this invention Front view of detachable device Top view of the detachable device Side view of detachable device Perspective view of unit-type electronic watt-hour meter Perspective view of a detachable device attached to a unit-type electronic watt-hour meter Cross-sectional view of the main part of the attachment / detachment device attached to the unit-type electronic watt-hour meter Schematic diagram showing the fixed state of the column tip and unit case Schematic diagram of pull-out hook Perspective view of gear mechanism Front view of unit-type electronic watt-hour meter shown in the prior art Perspective view of unit for electronic watt-hour meter shown in the prior art

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the attachment or detachment apparatus of the unit for electronic watt-hour meters which concerns on this invention is demonstrated using drawing.

  As shown in FIGS. 1 to 4, the attachment / detachment device 1 is for attaching / detaching the unit 4 to / from the unit case 3 of the unit-type electronic watt-hour meter 2 having a socket structure. , A fixing means 6 for fixing the column 5 to the unit case 3, a pulling hook 8 that can be locked to the locking portion 7 of the unit 4, and the pulling hook 8 are provided integrally with the unit 4 in the unit case 3. A pressing plate 9 to be pushed in, a gear mechanism 10 as a pulling hook moving means for moving the pulling hook 8 in the direction of the central axis of the column 5, and a holding spring 11 for holding the unit 4, A guide plate 12 that can be disposed at a position adjacent to the unit 4 in the thickness direction is provided.

  As shown in FIG. 5 and FIG. 6, the electronic watt-hour meter 2 has a unit case 3 mounted with a unit 4 such as a communication unit 4a, a power amount measuring unit 4b, and a switch unit 4c via a socket structure. For example, each unit 4 is periodically replaced in a use period of about 10 years.

  The unit case 3 is formed, for example, from an iron plate in a container shape having an opening on the front side, and a flange 13 protruding outward is formed on the opening edge. The unit case 3 is accommodated in an electronic watt-hour meter box including a container-like box body 3a whose front side is open (see FIG. 7).

  Each unit 4 has base ends on both sides in the width direction fixed to the unit case 3 by unit fixing screws 14, and locking portions 7 are formed in the vicinity of the screw holes.

  The column 5 is formed in a gate shape formed by hinge-connecting a U-shaped stand 16 on both sides of a U-shaped main body base 15. The both stands 16 of the support column 5 have a distance (B) between their outer surfaces set to 190 mm or less, for example, and the height of a fixed claw operation knob 21 (described later) from a claw portion 19 (described later) of the fixed claw 18 (described later). By setting (H) to, for example, 65 mm or more, the box body 3a can be accommodated.

  On the front side of the main body base 15, the guide plate 12 is fixed by screws 12 a, and screws 16 a as protrusions provided on the stand 16 are inserted into long holes 12 b formed in the guide plate 12. As a result, both the stands 16 can be swung with the hinge coupling portion with the main body base as a swing shaft while moving the screw 16a in the long diameter direction of the long hole 12b, and according to the width of the unit case 3 Thus, the distance between the tips of both stands 16 can be adjusted within a predetermined range.

  As shown in FIGS. 7 and 8, the fixing means 6 includes the tip edge 16 a of the stand 16 of the column 5 that contacts the opening edge of the unit case 3, and the tip end portion of the stand 16 that can be inserted into the inside of the opening of the unit case 3. It consists of an insertion plate portion 17 protruding from the inside and a fixing claw 18 that can be engaged with the flange 13 of the opening edge of the unit case 3, so that the support column 5 is firmly fixed to the unit case 3 by these three-way tightening. It has become.

  The fixed claw 18 is swingably provided inside the stand 16 having a U-shaped cross section, and the claw portion 19 is separated from the flange 13 of the unit case 3 by a compression spring 20 provided in the vicinity of the claw portion 19 at the tip. And is biased in the direction of releasing the engagement.

  The base end side of the fixed claw 18 is connected to the tip of a fixed claw operation knob 21 provided near the base end of the stand 16, and the fixed claw operation knob 21 is rotated to swing the fixed claw 18. The claw portion 19 is detachable with respect to the collar 13. The engagement between the collar 13 and the claw portion 19 can be confirmed from a window 22 formed in the stand 16. A disc spring 23 is interposed between the fixed claw operation knob 21 and the stand 16 to prevent the fixed claw operation knob 21 from loosening.

  As shown in FIG. 9, the pull-out hook 8 is swingably provided on the back side of the pull-out hook support 24, and the hook portion 25 on the tip side is locked to the locking portion 7 of the unit 4 from the back side. Thus, the proximal end side of the pull-out hook 8 is biased by the compression spring 26. The pull-out hook support 24 is movable by the gear mechanism 10, and the unit 4 is pulled out by moving the pull-out hook support 24 together with the pull-out hook 8 toward the base end side of the column 5.

  The front end surface of the hook portion 25 is an inclined surface, and when the attachment / detachment device 1 is pushed in and attached, the front end surface of the hook portion 25 once slides with respect to the locking portion 7 of the unit 4 and the compression spring 26 The extraction hook 8 swings against the urging force, and then the hook portion 25 is automatically locked by the urging force of the compression spring 26.

  The presser plate 9 is a U-shaped plate that is open on the side facing the main body base 15 on the base end side of the support column 5 and is stretched over the base end side surfaces of the pull-out hook supports 24 on both sides. The presser plate 9 is configured to push the unit 4 when the pull-out hook support 24 moves to the front end side of the column 5.

  As shown in FIG. 10, the gear mechanism 10 includes a plurality of gears 27 a, 27 b, 27 c, 27 d, 27 e that mesh with each other, and a screw 28 that projects from the proximal end side of the pull-out hook support 24. Screws 28 are screwed onto the gears 27a and 27e.

  The gears 27a, 27b, 27c, 27d, and 27e are rotatably supported by the main body base 15 of the support column 5 via ball bearings and the like, and are covered with a gear box 29 on the base end side of the main body base 15, A pulling operation knob 30 protruding from the gear box 29 toward the base end side is rotated to rotate the central gear 27c. By rotating the central gear 27c, the gears 27a and 27e at both ends are rotated, and the pulling hook supports 24 on both sides are interlocked with the movement of the screws 28 screwed to the gears 27a and 27e. It is designed to move in the direction.

  The holding spring 11 is provided on the main body base 15 of the support column 5 so as to surround the shafts of the gears 27 b and 27 d, and a tip portion of the holding spring 11 can pass through the presser plate 9. The holding spring 11 urges the unit 4 in a direction to push the unit 4 into the unit case 3 while penetrating the holding plate 9, and sandwiches the unit 4 with the hook portion 24 of the pull-out hook 8.

  The guide plate 12 is a plate having a thickness that can be inserted into the gap between the units 4 so as to be positioned when the detachable device 1 is set, and is screwed to the front side of the main body base 15 of the column 5. The guide plate 12 is located on the front side of the unit 4 and prevents the unit 4 from coming off from the pull-out hook 8 locked to the locking portion 7 of the unit 4 from the back side, and when the unit 4 is pulled out. It functions as a tilt stop that prevents the unit 4 from falling due to the eccentricity of the pulling force. The guide plate 12 is formed with a window hole 12c for visually recognizing the presser plate 9, and the side edge of the window hole 12c indicates the position of the presser plate 9 in the central axis direction of the column 5 and is pulled out. A scale line 12d for determining the set position of the hook 8 is provided.

  Next, a procedure for removing the unit from the unit case using the attachment / detachment device will be described. First, the unit fixing screw 14 of the unit 4 is completely loosened, and the pulling operation knob 30 of the attaching / detaching device 1 is turned to remove the unit 4 from the scale line 12d of the guide plate 12 to the electronic watt-hour meter 2 The instruction line provided on the presser plate 9 is aligned with the corresponding line.

  Next, the detachable device 1 is arranged so that the guide plate 12 is on the front side, the guide plate 12 is inserted into the gap between the units 4 while the center of the detachable device 1 is aligned with the center of the unit case 3, and the detachable device 1 is removed. After positioning, the insertion plate portion 17 at the tip of the stand 16 is inserted into the gap between the inside of the opening of the unit case 3 and the unit 4. As a result, the leading edge 16 a of the stand 16 contacts the opening edge of the unit case 3, and the leading surface of the hook portion 25 of the pulling hook 8 slides relative to the locking portion 7 of the unit 4, while the pulling hook 8 The pulling hook 8 is automatically locked to the locking portion 7 by swinging.

  The left and right fixed claw operating knobs 21 are rotated, the left and right fixed claws 18 are swung against the urging force of the compression spring 20, and the claw portions 19 are moved from the outside to the flange 13 at the opening edge of the unit case 3. Engage. Thereby, the stand 16 on both sides of the column 5 is firmly fixed to the unit case 3 by three-way tightening by the insertion plate portion 17, the leading edge 16 a of the stand 16, and the claw portion 19.

  The pulling operation knob 30 is turned to move the pulling hooks 8 on both sides to the proximal end side in the central axis direction of the column 5, and the guide plate 12 prevents the unit 4 from tilting due to eccentricity of the pulling force. Pull out. As the extraction hook 8 is moved, the holding spring 11 protrudes from the presser plate 9 that moves together with the extraction hook 8, and the unit 4 is held by the holding spring 11, the extraction hook 8 and the guide plate 12. .

  Thereafter, the left and right fixed claw operation knobs 21 are loosened, the unit 4 is removed together with the attachment / detachment device 1, and the base end side of the pull-out hook 8 is pushed and swung on a stable base, for example, to the locking portion 7. The lock of the pull-out hook 8 is released, and the unit 4 is detached from the attachment / detachment device 1.

  Next, a procedure for attaching the unit to the unit case using the attachment / detachment device will be described. First, the pulling operation knob 30 of the attachment / detachment device 1 is turned to move the pulling hook 8 and the presser plate 9 toward the base end side in the central axis direction of the column 5, and the holding spring 11 is protruded from the presser plate 9.

  Next, the detachable device 1 is arranged so that the guide plate 12 is on the front side, the holding spring 11 is pushed back, and the unit 4 is pushed along the guide plate 12 to automatically swing the extraction hook 8. It is moved and locked to the locking portion 7 of the unit 4.

  The detachable device 1 is disposed at a predetermined position of the unit case 3, the insertion plate portion 17 at the tip of the stand 16 is inserted into the opening inside the unit case 3, and the tip edge 16 a of the stand 16 is brought into contact with the opening edge of the unit case 3. Let Further, while the detachable device 1 is pushed and supported with one hand, the left and right fixed claw operation knobs 21 are rotated to engage the left and right fixed claws 18 with the flanges 13 of the unit case 3, so 16 is firmly fixed to the unit case 3.

  By rotating the pulling operation knob 30 and moving the presser plate 9 toward the distal end in the central axis direction of the support column 5 until there is a response, the unit 4 is pushed into the unit case 3 by the presser plate 9 and attached.

  Thereafter, the pulling operation knob 30 is rotated in the opposite direction to reduce the reaction force acting on the fixed claw 18, the left and right fixed claw operation knobs 21 are rotated, and the fixed claw 18 is moved to the flange 13 of the unit case 3. Remove from. The bases of the left and right pulling hooks 8 are pressed with fingers to release the locking of the pulling hooks 8 to the locking part 7 of the unit 4, the detachable device 1 is detached from the unit case 3 and the unit 4, and the unit 4 is attached. Is completed.

  According to the above configuration, the unit 4 can be pulled out or pushed in simply by rotating the pulling operation knob 30. For example, even if the mounting height is about 2 m on a ladder or a stepladder. Furthermore, the unit 4 can be easily attached / detached even when it is installed between narrow houses and the work interval is limited. Further, the unit 4 can be pulled out and pushed in by one detachable device 1, and the unit 4 can be exchanged in a short time by a simple operation.

  Further, the L-shaped bracket in which the unit case 3 is often installed tends to have insufficient strength against the force applied to attach / detach the unit 4, but the column 5 of the attaching / detaching device 1 is fixed to the unit case 3. Since the unit 4 is attached and detached, the unit 4 can be attached and detached without damaging the L-shaped bracket.

  In addition, this invention is not limited to said embodiment, A change can be suitably added within the scope of the present invention. For example, various mechanisms other than the gear mechanism 10 such as a belt, a chain, and a link mechanism can be used as the pulling hook moving means for moving the pulling hook 8 in the central axis direction of the column 5. Further, the unit 4 can be held by the pull-out hook 8 and the guide plate 12 without providing the holding spring 11.

DESCRIPTION OF SYMBOLS 1 Detachable device 2 Electronic watt-hour meter 3 Unit case 3a Box main body 4 Unit 5 Prop 6 Fixing means 7 Locking part 8 Pull-out hook 9 Holding plate 10 Gear mechanism 11 Holding spring 12 Guide plate 12b Long hole 12c Window hole 12d Scale Line 13 鍔 15 Body base 16 Stand 16a Screw 17 Insertion plate part 18 Fixing claw

Claims (3)

An attachment / detachment device for attaching / detaching a unit to / from a unit case of an electronic watt-hour meter having a socket structure,
A gate-shaped column, a fixing means for fixing the column to the unit case, a pull-out hook that can be locked to the locking portion of the unit, and a pull-out hook that moves the pull-out hook in the central axis direction of the column Moving means, and a pressing plate for pressing the unit into the unit case,
The column is provided with a guide plate that can be disposed at a position adjacent to the unit and its thickness direction, and a spring that biases the unit in a direction to push the unit into the unit case,
The apparatus for attaching / detaching an electronic watt-hour meter unit, wherein the pressing plate is provided integrally with a pull-out hook.   The fixing means includes a front end edge of the column that contacts the opening edge of the unit case, an insertion plate portion that protrudes from the front end portion of the column so as to be inserted inside the opening of the unit case, and an outward projection from the opening edge of the unit case. The apparatus for attaching and detaching an electronic watt-hour meter unit according to claim 1, further comprising a fixing claw that can be locked to the hook.   The pull-out hook is provided so as to be swingable with respect to the support column, and is elastically biased in a direction to be locked in the locking portion of the unit, and is pushed into the pull-out hook toward the locking portion. 3. An electronic watt-hour meter according to claim 1 or 2, wherein an inclined surface is formed to slide the pulling hook against an urging force while sliding relative to the locking portion. Unit attachment / detachment device.

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