JP6160239B2 - Insulation barrier mounting structure for switchgear - Google Patents

Description

  The present invention relates to an insulating barrier mounting structure that is mounted on a base of a switchgear for a disconnector, a load switch, and the like and insulates between terminals of each phase and ground.

  First, taking a three-phase disconnector as an example, a conventional mounting structure of an insulating barrier mounted on a base of a switchgear is shown in FIGS. In each figure, 1 is a main body of a disconnector, 2 is a base thereof, 2a is a mounting frame disposed on both left and right sides of the base 2, 2b and 2c are upper and lower parts straddling the mounting frame 2a. The base plate installed on the base plate 3 is a support insulator for terminals corresponding to the R, S, and T phases mounted on the base plates 2b and 2c, 4 is the input terminal on the upper side, 5 is the output terminal on the lower side, and 6 is the input / Opening / closing blade disposed between the output terminals, 7 is an insulating barrier (optional product). In the illustrated example, the insulating barrier 7 is disposed between the R, S, T phases, and the base 2 A total of four insulating barriers 7 are arranged in a standing posture divided into ground barriers 7b arranged at both ends. In addition, the said base 2 is installed in the installation surface 11 (for example, the attachment frame provided in the panel of a switchboard) behind it.

  Here, as shown in FIGS. 11A and 11B, the insulating barrier 7 is provided with sheet metal fasteners 8 and 9 at two upper and lower positions along the rear edge of the insulating plate, The insulating barrier is mounted on the front surfaces of the base plates 2b and 2c in an upright position via the fasteners 8 and 9 as described below.

  That is, of the fasteners 8 and 9, the upper-side fastener 8 is formed with a hook-shaped engaging claw 8a at the tip, and the tip of the engaging claw 8a is drilled in the plate surface of the upper base 2b. Insert it into the hanging hole and hook it. On the other hand, the lower-side fastener 9 is formed with a Dalma hole 9a in the plate surface at the tip bent in an L shape, and a fastening bolt 10 screwed on the lower base plate 2c is passed through the Dalma hole 9a to be bolted. ing.

  By the way, the above-described conventional insulation barrier mounting structure has the following problems in its mounting workability. In other words, as an insulation barrier is an optional switchgear, it is often installed on the user's side after installing a disconnector, load switch, etc., so it is desirable that the insulation barrier can be installed and removed as easily as possible. It is.

  In this respect, in the above-described conventional barrier mounting structure, it is necessary to fasten the fastener 9 provided on the rear edge of the insulating barrier 7 to the base plate 2c with the fastening bolt 10 as shown in FIG. Moreover, in the state where the main body 1 of the disconnector comprising the insulator 3, the terminals 4, 5, and the blade 6 is assembled to the base 2 (see FIG. 9), the play of the portion where the interphase barrier 7a and the ground barrier 7b are mounted. The interval is narrow and sufficient work space cannot be secured. For this reason, it is difficult for a user who is unfamiliar with the operation to perform the bolting operation using a tool. In addition, if the fastening bolts 10 are not sufficiently tightened, the bolts 10 may be loosened due to externally applied vibrations, etc., causing the insulation barrier 7 to sway or fall off the base plate on the base side.

In addition, the conventional structure uses two types of fasteners 8 and 9 having different shapes for each insulating barrier, which increases the number of parts and increases the cost.
The present invention has been made in view of the above points, and its object is to solve the above-mentioned problems, simplify the installation and removal of the insulation barrier, and play back the insulation barrier attached to the base plate on the base side. It is an object of the present invention to provide an insulating barrier mounting structure for a highly reliable switchgear which is improved so as to prevent a side shake and to maintain a stable standing posture.

In order to achieve the above object, according to the present invention, there is provided an insulating barrier mounting structure that is mounted on a base of a switching device such as a disconnect switch, a load switch, etc., and insulates between each phase and between the ground, The insulating barrier is detachably attached to the base plate on the base side via a fastener provided at the rear edge of the insulating plate.
The fastener includes a leg portion having a engaging claws of the pair of left and right hook shaped distal end portion of the U-shaped, it consists of a snap-fit of the leaf spring assembled to the leg portion, the base-side base The plate is provided with a hole corresponding to the engagement claw and snap fit individually, and the engagement claw of the fastener is hooked on one of the hooks, and the other spring is made of a leaf spring type . The snap-fit is pushed in and snap-fit coupled (Claim 1), and the detailed structure can be configured in a specific manner as described below.
( 1 ) The leaf spring type snap fit is a cantilever type snap fit, and its mounting base is overlapped and fixed to the leg piece of the fastener (claim 2 ).
( 2 ) In the leg piece portion of the fastener, a protrusion-like column is additionally provided at a position displaced from the engagement claw, and the column is formed in a column fitting hole formed in the base plate on the base side. The insulation barrier is kept in a stable standing posture by fitting together (claim 3 ).
(3) the base plate of the base side is the U-shaped steel plates, the engaging claw of the fastener at a corner of both side edges along its longitudinal direction, and distributes the hanging holes corresponding to the snap fit of the leaf spring and bored so as achieve simplification of detaching operations of the insulation barrier (claim 4).

According to the said structure, there can exist the following effect. That is, (1) when mounting the insulation barrier, after hooking hook-shaped engagement claws formed on the fastener fixed to the rear edge of the insulation plate to a hanging hole formed in the base plate on the base side, With this engaging claw as a fulcrum, the plate spring type snap fit is pushed into the other hanging hole and engaged, and the fastener is snap-fit connected to the base plate on the base side without using a fastening bolt. This can greatly improve the installation workability.
(2) Further, in addition to the engaging claw and leaf spring type snap fit, by fitting the protruding column provided on the leg piece of the fastener into the column fitting hole of the base plate on the base side, It is possible to stabilize the support posture with respect to the lateral swing by using the support portion of the insulating barrier as a multi-point support.

It is explanatory drawing of the installation operation procedure of the insulation barrier by the Example of this invention, Comprising: (a) is the state immediately before mounting | wearing an insulating barrier with the base plate of a board | substrate side, (b) is a base plate with the engaging claw of a fastener. (C) is a view showing a state in which an insulating barrier is mounted by snap-fitting a leaf spring type snap fit to a base plate. It is explanatory drawing of the removal procedure of an insulation barrier, Comprising: (a) The mounting state of the insulation barrier which engaged the engaging claw of the fastener, and the leaf | plate spring type snap fit with the base plate on the board | substrate side, (b) is a board FIG. 5C is a diagram illustrating a state in which the spring-type snap fit is pulled out from the base plate, and FIG. It is the external view of an insulation barrier which fixed the fastener by this invention, Comprising: (a), (b) is a side view and a front view, respectively. FIG. 4 is a plan view showing a state in which the insulation barriers between the phases and the ground of FIG. It is an enlarged plan view of the insulation barrier attachment location in FIG. It is an exploded view of the fastener in FIG. 5, (a) is the external appearance perspective view of a fastener main body, (b), (c) is the front view of a leaf | plate spring type snap fit, and a side view. It is the external view of the fastener which fixed the leaf | plate spring type snap fit to the fastener main body of Fig.6 (a), Comprising: (a), (b) is the external perspective view seen from the front side and the back side, respectively. It is the principal part enlarged view of the base board in FIG. 5, Comprising: (a), (b) is the perspective view seen from the upper surface side and the lower surface side, respectively. It is a side view of the whole switchgear in which an insulation barrier is mounted on the base of the three-phase disconnector as an example. FIG. 10 is a plan view of FIG. 9. It is a figure showing the conventional attachment structure of the insulation barrier in FIG. 10, Comprising: (a) is a side view, (b) is a front view.

Hereinafter, embodiments of the present invention will be described based on the examples shown in FIGS. In the drawings of the embodiment, members corresponding to those in FIGS. 10 and 11 are denoted by the same reference numerals.
In the barrier mounting structure of the illustrated embodiment, the insulating barrier is mounted on a base plate disposed on the base side of the switchgear through a fastener having the following structure, and the entire structure of the insulating barrier is shown in FIG. FIG. 4 shows a state where the insulating barrier is mounted on the base of the switchgear. In FIG. 3, reference numeral 12 denotes a fastener provided at the rear edge of the insulating barrier 7, and the interphase barrier 7a and the ground-to-ground barrier 7b are connected to the base of the base 2 via the fastener 12 in the same manner as in the conventional structure of FIG. It is mounted in a standing posture in front of the plate 16.

  Next, the detailed structure of the fastener 12 is shown in FIGS. That is, the fastener 12 has a structure in which a leaf spring type snap fit 15 (see FIGS. 6B and 6C) is assembled to a sheet metal body (see FIG. 6A) (FIGS. 7A and 7A). b)).

  Here, an attachment base 13 and a leg piece 14 are formed in an L shape on the main body of the fastener 12 (see FIG. 6A), and the attachment base 13 is an insulating barrier through bolts or rivets. 7 is fixed to the plate surface (see FIG. 3). Further, the leg piece portion 14 is bent into a U shape, and a pair of left and right hook-shaped engagement claws 14a are formed at the upper edge portion of the leg piece portion 14 and are displaced downward from the engagement claws 14a. A protrusion-like engagement support post 14b is formed to protrude. Further, a rivet hole 14c for fixing the leaf spring type snap fit 15 is formed on the central wall surface of the leg piece portion 14, and an engaging convex portion 14d is formed thereabove.

  On the other hand, as shown in FIG. 6 (c), the leaf spring type snap fit 15 is formed by bending a leaf spring material into a Z-shape and projecting the lower half portion forward, and at the bent portion projecting forward. Has a convex engaging portion 15a, and further, a rivet hole 15b is formed on the plate surface of the mounting base portion on the upper half side, and a concave groove (notch groove) 15c for engagement is formed on the upper edge.

  In the leaf spring type snap fit 15, the upper half base portion is overlapped with the leg piece portion 14 of the fastener 12 as shown in FIG. In addition, the convex part 14d of the said leg piece part 14 fits in the ditch | groove 15c of the snap fit 15 in this attachment position, and is connected with rotation prevention.

On the other hand, the base plate 16 on the base side facing the fastener 12 provided on the insulating barrier 7 is shown in FIG. 8 in accordance with the mounting positions of the interphase barrier 7a and the ground barrier 7b shown in FIG. As described above, the engaging claws 14a of the fastener 12, the engaging portions 15a of the leaf spring type snap fit 15, the engaging holes 14a and 16b individually corresponding to the engaging struts 14b of the fastener 12, and the strut fitting holes 16c are provided. Is formed.

  Next, an operation procedure when the insulating barrier 7 with the fastener is attached to the base plate 16 on the base side will be described with reference to FIGS. First, the fastener 12 is aligned with the mounting position of the base plate 16 as shown in FIG. 1A, and the engaging claw 14a having a hook shape as shown in FIG. Hang on. Subsequently, the insulating barrier 7 is pushed in the direction of arrow A with the engaging claw 14a as a fulcrum. As a result, the convex engaging portion 15a of the leaf spring type snap fit 15 hits the edge of the hanging hole 16b of the base plate 16 and bends in the direction of arrow B, and the engaging portion 15a protrudes to the back side of the base plate 16 and The engagement strut 14b of the tool 12 is fitted into a strut fitting hole 16c opened in the base plate 16, and the insulating barrier 7 is locked and held on the front surface of the base plate 16 in a standing posture as shown in FIG. . FIG. 5 shows an enlarged front view of the insulation barrier 7 attached.

On the other hand, when the insulating barrier 7 attached to the base plate 16 is removed, the leaf spring type snap fit 15 is attached in the attached state of FIG. 2A as shown in the operation procedure of FIGS. Hold the lower end and bend in the direction of arrow C, or pull the insulating barrier 7 in the direction of arrow D. As a result, the fastener 12 has the engaging claw 14a as a fulcrum, and the engaging portion 15a of the leaf spring type snap fit 15 and the engaging column 14b come out from the hooking hole 16b and the column fitting hole 16c of the base plate 16 (FIG. 2 (b)). Subsequently, by pulling out the engaging claw 14a from the hanging hole 16a of the base plate 16, the insulating barrier 7 can be removed as shown in FIG.

  In the illustrated embodiment applied to a three-phase switchgear, a total of four insulating barriers including two interphase barriers 7a and a ground barrier 7b along the longitudinal direction of the base plate 16 as shown in FIG. A predetermined insulation interval is secured between the respective insulation barriers by being arranged at the left and right relative positions with respect to the center line A. In this case, the fasteners 12 of the insulation barriers 7a and 7b arranged on the left side of the center line A are fixed to the right side of the insulation barrier, and the fasteners 12 of the insulation barrier arranged on the right side of the center line A are fixed to the left side of the insulation barrier. In this way, the four insulating barriers are set within the width of the base 2. Therefore, as for the fastener 12, two types of fasteners for leftward and rightward use are prepared and used properly.

  As described above, the fastener 12 of the illustrated embodiment is supported on the base plate 16 at multiple points (three-point support) by the pair of left and right engaging claws 14a and engaging struts 14b provided on the leg pieces 14. Furthermore, it can be attached to and detached from the base plate 16 through a leaf spring type snap fit 15 with a simple one-touch operation. Therefore, without using the fastening bolt 10 (see FIG. 11) as in the conventional mounting structure, the insulating barrier 7 can be stably mounted on the base 2 in a standing posture, and the mounting workability is greatly improved. .

  Moreover, in the mounted state of the insulating barrier 7 shown in FIG. 5, the multi-point support structure, particularly the engagement strut 14b, is applied even if a roll load in the directions of arrows E and F is applied to the insulating barrier 7 due to external force and vibration. By fitting in the column fitting holes 16 c of the base plate 16, it is possible to effectively prevent the lateral swing of the insulating barrier 7. Further, since the engaging portion 15a of the leaf spring type snap fit 15 is snap-fit coupled to the hooking hole 16b of the base plate 16, there is no possibility that the insulating barrier 7 will drop off unexpectedly.

1 Disconnector (switching device)
2 Base 7 Insulation barrier 7a Interphase barrier 7b Ground barrier 12 Fastener 14 Leg piece portion 14a Hook-shaped engagement claw 14b Engagement post 15 Plate spring type snap fit 15a Engagement portion 16 Base plate 16a, 16b Hanging hole 16c Prop fitting hole

Claims (4)

An insulating barrier mounting structure that is mounted on the base of a switching device such as a disconnect switch or load switch to insulate between each phase and the ground, and the insulating barrier is a fastening provided at the rear edge of the insulating plate In what is detachably mounted on the base plate on the base side through a tool,
The fastener is a leg piece provided with a pair of left and right hook-shaped engaging claws at the U-shaped tip ,
It consists of a leaf spring type snap fit assembled to this leg piece ,
The base plate on the base side is provided with a hole corresponding to the engagement claw and snap fit individually, and the engagement claw of the fastener is hung on one of the holes, and the other hole is formed. insulating barrier mounting structure of the opening and closing device, characterized in that the snap-fit connection by pushing the snap fit of the plate spring on. The insulating barrier mounting structure according to claim 1 , wherein the leaf spring type snap fit is a cantilever type, and the mounting base is overlapped and fixed to the leg piece of the fastener. Insulation barrier mounting structure. Base the insulating barrier mounting structure according to claim 1, the leg portion of the fastener, the engaging pawl and projecting struts displaced portion provided to face the struts of the base side An insulating barrier mounting structure for an opening / closing device, characterized in that a plate is provided with a column fitting hole. The insulating barrier mounting structure according to claims 1 to 3, the base plate of the base side is a U-shaped steel plates, the engaging claw of the fastener to the corner of the side edges, corresponding to the snap fit of the leaf spring An insulating barrier mounting structure for an opening / closing device, wherein the hanging holes are divided and drilled.