JP6920968B2 - Switchgear - Google Patents

Description

The present invention relates to a structure in which a switchgear, particularly a built-in unit including a circuit breaker or the like, is mounted in a metal closed type switchgear.

In a general metal closed switchgear, an electric circuit for power distribution is formed by fastening a plurality of board surfaces adjacent to each other. These general switchgear are composed of a main circuit chamber for forming a main circuit and a control chamber in which control equipment for controlling the main circuit equipment is integrated, and the control chamber is configured in front of the switchgear. Often.
A circuit breaker is one of the main devices in the main circuit. The disconnector has wheels so that the disconnector / connection can be operated manually, and is locked at each location so that it will not move easily when placed at the disconnector / connection position. In addition, the switchgear has a shutter mechanism that operates so as to cover the connection terminal with the circuit breaker provided on the switchgear housing side when the circuit breaker is carried out so that the conductive part is not exposed when the circuit breaker is pulled out. ing.
Since there are multiple mechanisms around the circuit breaker as described above, in the configuration for storing such a circuit breaker, the part for storing the circuit breaker is unitized into a box-shaped structure. It is often mounted in a switchgear (see, for example, Patent Document 1 and Patent Document 2).

Japanese Patent Application Laid-Open No. 2002-335609 JP 2015-88509

When the built-in unit for accommodating the circuit breaker is mounted in the switchgear, the switchgear is assembled by mounting the built-in unit in the switchgear by human power or by using a crane or the like. By unitizing the area around the circuit breaker, it is possible to assemble complicated mechanical parts outside the switchgear housing, which has the advantage of good workability. However, when the rated voltage exceeds a certain level, the unit The weight becomes large, and it becomes difficult to insert it into the switchgear housing. Workability can be improved by using a dedicated jig, but jig installation and removal work is required, leading to an increase in cost. Incorporating a frame having a jig function into the housing structure has a problem that the material cost of the switchgear increases.

The present invention is intended to solve the above problems by providing auxiliary members that are detachably attached to the built-in unit and the switchgear housing, respectively.

Switch gear according to the present invention includes a built-unit mounted by being inserted into the interior of the housing, a first auxiliary having wheels extending in the insertion direction on both sides of the embedded unit while being configured to removably mount the member, the pre-Symbol first auxiliary member opposed to the housing the embedded unit to support the wheel extending before Symbol insertion direction both side surfaces of the It is characterized in that the second auxiliary member that guides in the insertion direction is detachably attached.

According to the present invention, the built-in unit can be easily inserted with good workability by the first and second auxiliary members that are detachably attached, and the original configuration of the built-in unit and the housing is maintained. At the same time, the required purpose can be achieved.

It is a perspective view of the built-in unit which consists of the fixed frame unit mounted on the switch gear in Embodiment 1 which concerns on this invention. It is a side view which shows the typical structure of the switchgear which is widely used. It is a detailed block diagram which shows the claw shape of the claw part provided on the back surface of the fixed frame unit in Embodiment 1 which concerns on this invention. It is a top view which shows the housing (only the pillar part is displayed) in Embodiment 1 which concerns on this invention. It is a front view which shows the shape of the slit hole for inserting the claw part of the fixed frame unit provided in the housing pillar in Embodiment 1 which concerns on this invention. It is a top view and the side view of the auxiliary member consisting of a jig attached to the fixed frame unit in Embodiment 1 which concerns on this invention. It is a detailed block diagram which shows the claw shape of the claw part provided in the auxiliary member consisting of the jig attached to the fixed frame unit in Embodiment 1 which concerns on this invention. It is a top view and a side view of the auxiliary member consisting of a jig attached to the housing pillar in Embodiment 1 which concerns on this invention. It is an image figure of the fixed frame unit insertion in Embodiment 1 which concerns on this invention. It is a front view at the time of inserting the fixed frame unit in the state which attached the jig in Embodiment 1 which concerns on this invention. It is sectional drawing and the side view which show the hole part for jig attachment provided in the fixed frame unit in Embodiment 2 which concerns on this invention. It is an image figure which shows the insertion work state of the fixed frame unit in Embodiment 3 which concerns on this invention.

Embodiment 1.
The switchgear according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 10.
FIG. 1 shows a built-in unit (hereinafter, referred to as a fixed frame unit 1) in which a circuit breaker accommodating portion of a switchgear in the first embodiment is integrated, and FIG. 2 shows a circuit breaker CB described in FIG. It is a typical cross-sectional view of a switchgear having a housing CS into which the stored fixed frame unit 1 is inserted. As shown in FIG. 2, a general high-voltage switchgear comprises a control chamber 2 that constitutes a control circuit on the front side and a main circuit chamber 3 that constitutes a main circuit.
An object of the present invention is to facilitate the insertion work of the built-in unit composed of the fixed frame unit 1 constituting the switchgear, and the auxiliary member mainly composed of the built-in unit composed of the fixed frame unit 1 of the switchgear and the jig. There is a feature in the composition of.

(composition)
First, the structure of the built-in unit including the fixed frame unit 1 will be described with reference to FIG. A hole 4 is provided on the side surface of the fixed frame unit 1, and reinforcing plates 5a (upper part) and 5b (lower part) are attached to the inside of the side surface of the upper and lower end portions of the hole portion 4, respectively. On both side surfaces of the built-in unit made of the fixed frame unit 1, holes 4 and 4 are arranged side by side along the insertion direction of the built-in unit made of the fixed frame unit 1 into the housing CS. The hole 4 is provided with a reinforcing plate 5a and a reinforcing plate 5b for reinforcing the upper end edge portion UE and the lower end edge portion DE.
Further, a claw portion 6 is provided at the back corner portion of the built-in unit including the fixed frame unit 1. The details of the claw shape of the claw portion 6 are tapered 7 as shown in FIG. The claws 6 are directed toward the insertion direction into the housing CS at the back corners of the built-in unit composed of the fixed frame unit 1, that is, the corners CN forming the four corners of the end faces on the insertion side into the housing CS. It is a projecting one. Since the claw portion 6 has a taper 7, the tip portion TP has a tapered shape that is thinner than the base portion BP.

Next, the configuration of the main circuit chamber 3 in the switchgear housing CS will be described with reference to FIGS. 4 and 5. FIG. 4 is a top view showing a frame in the housing CS, and only representative columns are shown. The pillar 8 is arranged so that the back surface of the pillar 8 and the front surface 9 of the pillar 8 coincide with each other when the fixed frame unit 1 is installed at a predetermined position. A slit hole 10 having the shape shown in FIG. 5 is provided on the front surface 9 of the pillar 8 in order to insert the claw portion 6 of the fixed frame unit 1. That is, the shape of the insertion slit hole 10 provided in the pillar 8 is such that the uppermost side and the lowermost side are in the horizontal direction and the length is the same as or slightly longer than the thickness of the claw portion 6 of the fixed frame unit 1. The length in the vertical direction is the same as the length in the height direction of the claw portion 6 provided on the rear rear surface of the fixed frame unit 1, or has a substantially octagonal shape that is slightly longer.
Further, a hole setting surface PH for providing a mounting hole for mounting an auxiliary member made of a jig is formed on the side surface 11 of the pillar 8 in the housing CS and the side surface 13 of the pillar 12 in front of the switch gear.

Subsequently, an auxiliary member made of a jig used for insertion will be described. There are two types of auxiliary members, a jig 14 attached to the fixed frame unit 1 and a jig 15 attached to the switchgear housing CS. First, the jig 14 attached to the fixed frame unit 1 shown in FIG. 6 will be described.
FIG. 6A shows a top view of the jig 14, and FIG. 6B shows a side view of the jig 14. The jig 14 has a gutter shape with a U-shaped cross section, and a rotatable wheel 16 is attached to the inside of the U-shape. Further, a claw portion 19 is provided on the facing surface 18 facing the mounting surface 17 on which the wheel 16 is mounted so as to protrude outside the U-shape.

As shown in FIG. 7, the detailed shape of the claw portion 19 of the auxiliary member composed of the jig 14 is such that the base of the claw portion is constricted and the engaging surfaces 21 (lower part), 26 which are vertically parallel to the tip portion of the claw portion 19 are formed. (Upper part) is provided. That is, the shape of the claw portion 19 of the jig 14 is such that the root portion of the claw portion is constricted and the tip protrudes upward or downward. In the fixed frame unit 1 and the jig 14 having the above structure, when the jig 14 is attached with the fixed frame unit 1 placed on a flat surface such as a floor surface, the engaging surface 21 which is the downward protruding portion DP of the claw portion 19 Fits with the reinforcing plate 5b provided inside the insertion hole 4 of the fixed frame unit 1 and below the hole so that the jig 14 cannot be easily removed, and the jig 14 is attached to the wheel of the jig 14. When the 16 is placed on a rail or the like so as to apply a load, the engaging surface 26, which is the upward protruding portion UP of the claw portion 19, is provided inside the insertion hole portion 4 and above the hole portion in the fixed frame unit 1. It is fitted with the reinforcing plate 5a and has a structure in which the jig 14 does not easily come off.

An auxiliary member including a jig 15 attached to the switchgear housing CS is shown in FIG. FIG. 8A shows a top view of the jig 15, and FIG. 8B shows a side view of the jig 15. This jig 15 has a U-shape like the jig 14, but has no wheels and only a claw portion 20 protruding outward. Similar to the claw portion 19, the structure of the claw portion 20 has a constricted shape at the base of the claw portion.
A hole setting surface PH for providing a mounting hole for mounting an auxiliary member made of a jig 15 is formed on the side surface 11 of the pillar 8 and the side surface 13 of the pillar 12 in front of the switch gear in the housing CS, respectively, and the hole setting surface PH is formed. The claw portion 20 of the auxiliary member is inserted into the mounting hole provided on the surface PH, and the auxiliary member is attached to the housing CS.

Finally, a means for attaching the auxiliary members including jigs 14 and 15 to the built-in unit including the fixed frame unit 1 will be described.
Jigs 14 and 15 are attached to the switchgear housing CS and the fixed frame unit 1 so as to extend along the insertion direction of the built-in unit into the housing CS, respectively. On the CS side of the switchgear housing, the claw portion 20 of the jig 15 is forward to the insertion hole portion formed in the hole portion setting surface PH provided on the side surface 11 of the housing pillar 8 and the side surface 13 of the housing pillar 12, respectively. Insert and attach from.
The jig 14 is attached by inserting the claw portion 19 into the insertion hole portion 4 provided on the side surface of the fixed frame unit 1 from the front. The claw portion 19 is pushed in as much as possible so that the engaging surface 21 of the claw portion 19 and the reinforcing plate 5b attached to the inside of the side plate of the fixed frame unit 1 are in contact with each other. The lower surface of the jig wheel 16 when inserted is designed to be higher than the lower surface of the fixed frame unit 22 which is the lower surface of the fixed frame unit 1. The engaging surface 21 as the downward protruding portion DE of the claw portion 19 is engaged with the lower edge portion DE of the hole portion 4 provided on the side surface of the fixed frame unit 1 via the reinforcing plate 5b.

(motion)
The operation process related to the insertion work of the built-in unit including the fixed frame unit 1 into the housing CS will be described.
First, a built-in unit composed of the fixed frame unit 1 is placed on the upper plane which is the loading surface of the lifter 23, and as shown in FIG. 9, the fixed frame unit 1 is switched to the switchgear by using the lifter 23. The fixed frame unit 1 is inserted into the switchgear housing CS so as to be close to the position where it starts to be inserted into the housing CS. In the insertion work, as shown in FIG. 10, the wheel 16 provided on the auxiliary member made of the gutter-shaped jig 14 is placed on the inner bottom surface of the auxiliary member made of the gutter-shaped jig 15. The facing surface 24 and the guide surface 25 of the jig 15 are inserted at a position close to each other (the shape of the jigs 14 and 15 is such that the facing surface 24 of the wheel 16 and the guide surface 25 are attached when the jigs 14 and 15 are attached. Design so that they are close to each other). Even if the jig 14 and the jig 15 collide with each other due to a lifter operation error during insertion, the engaging surface 21 of the claw portion 19 of the jig 14 and the reinforcing plate 5b attached to the inside of the side surface of the fixed frame unit 1 interfere with each other. 14 does not come off from the fixed frame unit 1.
Further, when the wheel 16 is moving in the switch gear, the weight of the fixed frame unit 1 is applied to the jig 14, so that the engaging surface 26 as the upward protruding portion UP of the claw portion 19 and the reinforcing plate 5a come into contact with each other. Become. Therefore, even when the fixed frame unit 1 is inserted, the jig 14 does not come off from the fixed frame unit 1 because the claw portion 19 of the jig 14 and the reinforcing plate 5a interfere with each other.

Next, the wheel 16 is rotated to insert the fixed frame unit 1 rearward, and the claw portion 6 provided behind the fixed frame unit 1 is inserted into the slit hole 10 provided in the housing pillar 8 to a predetermined position. Place it. The claw portion 6 has a tapered shape with a taper 7, and the shape of the slit hole 10 of the pillar 8 into which the claw portion 6 is inserted is as shown in FIG. Even if the position in the direction is slightly deviated, it is considered that the fixed frame unit 1 can be arranged at a predetermined position by pushing it in. Further, the fixed frame unit 1 is designed to be lifted slightly upward by inserting the claw portion 6. After inserting the fixed frame unit 1, for example, if a beam frame is installed in the width direction and the front of the fixed frame unit 1 and the beam frame are fixed, the structure is stable. The claw portion 6 is provided with an engaging tapered portion UT that lifts the built-in unit composed of the fixed frame unit 1 upward by engaging with the lower end edge of the slit hole 10, and the insertion of the claw portion 6 into the slit hole 10 is completed. A holding base BP for holding the built-in unit composed of the fixed frame unit 1 in the upper position by the subsequent fitting is provided.

(Action effect)
Having the above structure makes it possible to easily mount the built-in unit made of the fixed frame unit 1 on the switchgear housing CS. When the auxiliary member made of the jig 14 is attached to the built-in unit made of the fixed frame unit 1 mounted on a flat surface, the lower surface of the wheel 16 which is the lowermost surface of the jig 14 is positioned above the lower surface of the built-in unit. However, the mounting work can be performed without load without contacting the flat surface on which the built-in unit is placed, and the built-in unit is held in the upper position after the insertion of the claw portion 6 into the slit hole 10 is completed. As a result, the wheels 16 of the jig 14 are separated upward from the jig 15, and the jigs 14 and 15 can be removed without any load. Although the installation / removal work of the auxiliary member consisting of jigs 14 and 15 is required, it can be installed without using bolts, and the weight of the fixed frame unit is not loaded on the jigs 14 and 15 after insertion. , It can be easily removed and does not lead to an increase in work man-hours. Since the jigs 14 and 15 can be used repeatedly for a plurality of switch gears, the material cost of the jigs 14 and 15 does not increase the product cost, and as a result, it can be manufactured at a low cost.

That is, the part for accommodating the circuit breaker CB has a box shape, and is a built-in unit composed of the fixed frame unit 1 as a unit so that it can be assembled outside the switchgear housing CS. The side surface of the built-in unit has mounting holes 4 for mounting auxiliary members made of jigs 14, and these jigs 14 have a structure of being hooked by claws 19 so that they can be mounted without using bolts. Wheels 16 are attached to the jig 14. Further, a jig 15 that can be hooked on the switchgear housing CS side with a claw portion 20 is used, and this jig 15 has a rail function when the built-in unit is inserted into the switchgear housing CS. The structure is such that the built-in unit can be easily inserted. Claws 6 are attached to the four corners of the rear surface of the built-in unit, and these claws 6 are inserted into slit holes 10 provided in the pillars of the switchgear housing CS, so that the built-in unit is arranged at a predetermined position. Will be done. By inserting the built-in unit into a predetermined position, that is, by completely inserting the claw portion 6 of the built-in unit into the slit hole 10 of the pillar, the claw shape and the housing pillar so that the built-in unit rises slightly upward. By designing the slit position of the jig, the weight load of the built-in unit is not applied to the jig when the built-in unit is arranged at a predetermined position in the switch gear.

By having the above structure, the built-in unit including the circuit breaker CB and the fixed frame unit 1 for accommodating the peripheral members thereof is rolled by the wheel 16 and inserted into the switchgear housing CS, so that the work efficiency is improved. The auxiliary member made of jigs 14 and 15 can be attached and detached without using a tool, and after the built-in unit is inserted, the weight of the built-in unit is attached to the auxiliary member made of jigs 14 and 15. Since the load is not applied, the built-in unit made of the fixed frame unit 1 can be easily removed, which has the effect of not significantly affecting the increase in the unit price of the switchgear product.
The first and second auxiliary members composed of jigs 14 and 15 are detachably attached to the built-in unit and the housing CS, respectively, and the first and second auxiliary members are the built-in unit. It can be attached and detached without disassembling the structure of the case and the structure of the housing CS. Therefore, the built-in unit can be easily inserted with good workability while properly maintaining the original configurations of the built-in unit and the housing CS.

(1) As shown in FIGS. 1 to 10, the following configuration is applied to the switchgear according to the first embodiment of the present invention.
A third unit including a fixed frame unit 1 including a breaker mounted by being inserted into the housing CS, the built-in unit including a jig 14 extending in the insertion direction and having wheels 16. The auxiliary member 1 is configured to be detachably attached, and the housing CS extends in the insertion direction and supports the wheel 16 to guide the built-in unit in the insertion direction from the jig 15. The second auxiliary member is detachably attached.
The first auxiliary member composed of the jig 14 has a gutter-shaped body having a U-shaped cross section provided with wheels 16 inside, extending along the insertion direction of the built-in unit into the housing CS, and the opening is directed downward. The wheels 16 can be configured to be provided in an internal space that opens downward. Further, in the second auxiliary member made of the jig 15, a gutter-shaped body having a U-shaped cross section extends along the insertion direction of the built-in unit into the housing CS and is arranged with the opening facing upward. It can be configured to have a rail function for supporting the wheel 16 on the inner bottom surface of the internal space that opens toward.
With this configuration, the built-in unit made of the fixed frame unit 1 can be easily inserted by the first and second auxiliary members made of jigs 14 and 15 that are detachably attached, and the built-in unit made of the fixed frame unit 1 can be easily inserted. The required purpose can be achieved while maintaining the original configuration of the unit and the housing CS. The first auxiliary member made of the jig 14 is detachably attached to the built-in unit, and the second auxiliary member made of the jig 15 is detachably attached to the housing CS. The auxiliary member 2 can be attached and detached without disassembling the structure of the built-in unit and the structure of the housing CS, and properly maintains the original configurations of the built-in unit and the housing CS. However, the built-in unit can be easily inserted with good workability.

That is, when the built-in unit consisting of the fixed frame unit 1 in which the periphery of the circuit breaker, which is the main circuit important device of the switchgear, is integrated into the switchgear housing CS, the built-in unit consisting of the fixed frame unit 1 is inserted. By attaching a first auxiliary member made of a jig 14 with wheels to the switchgear housing CS and attaching a second auxiliary member made of a jig 15 having a rail function to the columns 8 and 12 of the switchgear housing CS, the insertion work is easy. It is something to do.
Here, in the switchgear in which the built-in unit made of the fixed frame unit 1 is inserted and installed in the housing CS of the switchgear, the jig 14 made of wheels is provided on both side surfaces of the built-in unit made of the fixed frame unit 1. A hole 4 for detachably attaching the auxiliary member 1 is formed, and the switchgear housing CS side has a U-shaped cross section having a rail function for receiving the first auxiliary member composed of the jig 14 with wheels. A switch characterized in that a second auxiliary member made of a jig 15 is detachably provided on columns 8 and 12 of the switchgear housing CS to facilitate insertion and installation of an embedded unit made of the fixed frame unit 1. It has a gear structure.

(2) The following configuration is applied to the switchgear according to the first embodiment of the present invention in the configuration of the above paragraph (1).
The first auxiliary member made of the jig 14 is engaged with the claws 19 and 19 protruding from the outer surface and the holes 4 and 4 provided in the built-in unit made of the fixed frame unit 1. The second auxiliary member, which is detachably attached to the jig 15, has holes 20 and 20 projecting from the outer surface and holes provided on the surfaces 11 and 13 of the pillars 8 and 12 of the housing CS. It is detachably attached to the housing CS by engaging with a hole formed in the surface PH.
With this configuration, the first and second auxiliary members made of jigs 14 and 15 can be surely attached to the built-in unit made of the fixed frame unit 1 with good workability.

That is, the attachment portion of the first and second auxiliary members composed of jigs 14 and 15 to the switchgear housing CS or the built-in unit composed of the fixed frame unit 1 is projected in the outward direction of the jigs 14 and 15. Claws 19, 19 and claws 20, 20 are provided, and the claws 19, 19 and claws 20, 20 are provided on the side of the built-in unit including the housing CS or the fixed frame unit 1. It has a structure having a switch gear and a jig for inserting a fixed frame unit, which is characterized in that jigs 14 and 15 can be attached by inserting them into holes or holes 4 and 4.

(3) The switchgear according to the first embodiment of the present invention has the following configuration applied in the configuration of the above item (1) or the above item (2).
Said first auxiliary member made of a jig 14 is the lower surface of the wheel 16 is mounted in front Kigumikomi unit at a higher position than the fixed frame unit bottom 22 is a bottom embedded unit comprising a fixed frame unit 1 It is characterized by.
With this configuration, the first auxiliary member made of the jig 14 can be mounted on the built-in unit made of the fixed frame unit 1 with good workability without applying an unnecessary load.

That is, in the first auxiliary member composed of the built-in unit made of the fixed frame unit 1 and the jig 14 according to the item (1) or the above item (2), the first auxiliary member made of the jig 14 is attached to the built-in unit. When the member is attached, the lower surface of the wheel 16 is designed to be higher than the lower surface of the built-in unit so that the first auxiliary member made of the jig 14 can be attached without a load. be.

(4) The following configuration is applied to the switchgear according to the first embodiment of the present invention in the configuration of the above item (2).
An upper protruding portion UP and a lower protruding portion DP are formed on the claw portion 19 projecting from the outer surface of the first auxiliary member made of the jig 14, and the lower protruding portion DP is incorporated by the fixed frame unit 1. When the first auxiliary member is mounted with the unit placed on the floor surface, the lower end edge portion DE of the hole portion 4 of the built-in unit is engaged, and the upper protruding portion UP is mounted on the built-in unit. When the wheel 16 of the first auxiliary member made of the jig 14 is supported by the second auxiliary member made of the jig 15, it engages with the upper end edge UE of the hole 4 of the built-in unit. It is characterized by that.
With this configuration, the first auxiliary member made of the jig 14 can be reliably attached to the built-in unit at each stage of the insertion work.

That is, in the hole portion 4 for inserting the jig provided on the side surface of the built-in unit including the fixed frame unit 1 according to any one of the above items (1) to (3), the upper side and the lower side of the hole portion 4. A plate having the same length as the horizontal direction of the hole 4 is attached to the inside of the side surface as reinforcing plates 5a and 5b so as to be in contact with the jig 14, and the shape of the claw portion 19 of the jig 14 is such that the tip is upward or downward. The shape should be protruding. In the fixed frame unit 1 and the jig 14 having the above structure, when the jig 14 is attached with the fixed frame unit 1 placed on the floor surface, the downward protruding portion DP of the claw portion 19 is the fixed frame unit 1 insertion hole portion 4. The jig 14 is fitted to the plate 5b provided on the inside and under the hole so that the jig 14 cannot be easily removed, and the jig 14 is attached and placed on the rail of the jig 15 so that a load is applied to the wheels 16 of the jig 13. At this time, the upward protruding portion UP of the claw portion 19 is fitted with the reinforcing plate 5a provided inside the jig insertion hole portion 4 of the fixed frame unit 1 and above the hole portion, so that the jig 14 cannot be easily removed. do.

(5) The switchgear according to the first embodiment of the present invention has the following configuration applied to any of the configurations (1) to (4).
In the built-in unit composed of the fixed frame unit 1, the claws 6 are provided in the corners CN formed at the four corners of the rear back surface which are the end faces on the insertion side, and the claws 6 are provided in the housing CS. The built-in unit is fixed inside the housing CS by being inserted into the housing CS.
With this configuration, it is possible to reliably and easily perform the fixing operation after inserting the built-in unit composed of the fixed frame unit 1.
That is, in the built-in unit as a circuit breaker unit composed of the fixed frame unit 1, the claws 6 are provided at the four corners CN on the rear surface, respectively, and the claws 6 are inserted into the slit holes 10 provided in the housing pillars to be fixed. It has a characteristic switchgear structure.

(6) The following configuration is applied to the switchgear according to the first embodiment of the present invention in the configuration of the above item (5).
The claw portion 6 of the built-in unit composed of the fixed frame unit 1 is provided with a tapered portion 7 for reducing the tip portion TP, and a slit hole 10 is provided in the housing CS corresponding to the base portion BP of the claw portion 6. And.
With this configuration, it is possible to accurately perform the insertion and fixing work of the built-in unit including the fixed frame unit 1 with good workability.
That is, in the claw portion 6 on the rear surface of the breaker unit composed of the fixed frame unit 1 and the insertion hole 10 provided in the housing CS, a taper 7 is provided in the claw shape of the claw portion 6 and is provided in the pillar of the housing CS. The shape of the hole for insertion is such that the uppermost side and the lowermost side are in the horizontal direction, and the length is the same as or slightly longer than the thickness of the claw portion 6 of the fixed frame unit 1, and the vertical length is provided on the rear surface of the fixed frame unit. The structure of the switch gear is characterized by having an octagonal shape that is the same as or slightly longer than the length of the claw in the height direction.
Therefore, even if the positions in the left-right direction and the up-down direction are slightly deviated, the fixed frame unit 1 can be pushed in to be arranged at a predetermined position.
Further, the fixed frame unit 1 is designed to be lifted slightly upward by inserting the claw portion 6. After inserting the fixed frame unit 1, for example, if a beam frame is installed in the width direction and the front of the fixed frame unit 1 and the beam frame are fixed, the structure is stable.

(7) In the switchgear according to the first embodiment of the present invention, the following configuration is applied in the configuration of the above item (5) or the above item (6).
The claw portion 6 of the built-in unit composed of the fixed frame unit 1 is provided with an engaging tapered portion UT that lifts the built-in unit upward by engaging with the lower end edge portion of the slit hole 10, and the slit hole 10 of the claw portion 6 is provided. It is characterized in that a holding base portion BP for holding the built-in unit in an upper position is provided by fitting into.
With this configuration, the first and second auxiliary members including the jig 14 and the jig 15 can be easily removed with good workability after the built-in unit is inserted into the housing CS.
That is, in the switchgear structure according to the item (5) or the item (6), the claw portion 6 on the back surface of the fixed frame unit 1 is inserted into the hole 10 of the switchgear housing column and inserted to a predetermined position. As a result, the positions of the claws 6 and the insertion holes 10 are designed so that the fixed frame unit 1 is lifted slightly upward and the weight of the circuit breaker unit is not loaded on the jigs 14 and 15, and the jigs 14 and 15 are removed. The switchgear structure is characterized in that it can be easily removed without a load at the time of.

Embodiment 2.
Embodiment 2 according to the present invention will be described with reference to FIG. 11A and 11B are detailed configuration views showing a jig mounting hole portion of the fixed frame unit according to the second embodiment, FIG. 11A is a cross-sectional view, and FIG. 11B is a side view.
In the present embodiment, in the hole 4 for attaching the jig 14 to the fixed frame unit 1, the upper edge UE and the lower edge DE of the hole 4 are formed as shown in FIGS. 11A and 11B. A beaded portion BD having a depth equal to or greater than the thickness of the claw portion 19 is applied. By adopting the above, the reinforcing function can be achieved without using the reinforcing plates 5a and 5b in the first embodiment, and the number of parts can be reduced as compared with the first embodiment.

As shown in FIG. 11, the switchgear according to the second embodiment of the present invention has the following configuration applied.
The upper end of the built-in unit made of the fixed frame unit 1 with which the claw portion 19 provided on the first auxiliary member made of the jig 14 is engaged with the upper end edge portion UE and the lower end edge portion DE of the hole portion 4. A beaded portion BD for reinforcing the edge portion UE and the lower end edge portion DE is provided, respectively.
With this configuration, the number of parts for reinforcement can be reduced.
That is, in the built-in unit made of the fixed frame unit 1 according to the first embodiment, the hole portion 4 is located in the upper or lower part of the mounting hole part 4 for mounting the auxiliary member made of the jig 14 of the built-in unit in the horizontal direction. A beaded BD having the same width as the size and the same depth as the thickness of the claw portion 19 provided on the jig 14 is applied to the inside of the built-in unit made of the fixed frame unit 1.

Embodiment 3.
Embodiment 3 according to the present invention will be described with reference to FIG. FIG. 12 is an image diagram showing an insertion work state of the fixed frame unit according to the third embodiment.
In the present embodiment, the front control chamber 2 is unitized, and the unitized control chamber 2 is attached after the fixed frame unit 1 is inserted. By unitizing the control chamber 2 and retrofitting it, the lifter 23 used in the first embodiment can use a lifter 27 of a type in which the loading platform does not protrude forward. Since it is not a type that protrudes forward, the balance when the fixed frame unit 1 is placed is improved, the risk of falling is reduced, and it is possible to work safely.

As shown in FIG. 12, the following configuration is applied to the switchgear according to the third embodiment of the present invention in any of the above-described configurations of the first embodiment and the second embodiment.
A main circuit room 3 into which an embedded unit composed of a fixed frame unit 1 is inserted and mounted, and a control room 2 mounted and connected to the front side of the main circuit room 3 are provided, and the control room 2 is provided from the main circuit room 3 from the main circuit room 3. The control chamber 2 is attached to the main circuit chamber 3 after the built-in unit is inserted so as to be separable.
With this configuration, the insertion work of the built-in unit including the fixed frame unit 1 can be easily performed, and the workability can be improved.
That is, in any of the configurations according to the first embodiment or the second embodiment described above, the front control chamber 2 is separated, and the control chamber 2 is attached after the built-in unit composed of the fixed frame unit 1 is inserted. It is a characteristic switch gear. As a result, when inserting the built-in unit, it is possible to use a lifter 27 of a type in which the loading platform does not protrude forward.

In the present invention, the embodiments can be freely combined, and the embodiments can be appropriately modified or omitted within the scope of the invention.

1 Fixed frame unit (embedded unit), 2 Control room, 3 Main circuit room, 4 holes,
5a plate (upper side), 5b plate (lower side), 6 claws, 7 tapers, 8 pillars,
9 front, 10 slit holes, 11 side, 12 pillars, 13 side,
14 jigs (auxiliary members), 15 jigs (auxiliary members), 16 wheels, 17 mounting surfaces,
18 facing surface, 19 claws, 20 claws, 21 engaging surfaces, 22 bottom of fixed frame unit,
23 lifter, 24 facing surface, 25 guide surface, 26 engaging surface, 27 lifter.

Claims (9)

A built unit mounted by being inserted into the interior of the housing, the first auxiliary member detachably to mount a having an extended Mashimashi wheel insert direction on both sides of the embedded unit second guiding with the configuration, the pre-Symbol first auxiliary member opposite to said housing said built-unit bearing a rolled Mashimashi the wheel before Symbol insertion direction both side surfaces of the insertion direction A switch gear characterized in that the auxiliary member of the above is detachably attached. The first auxiliary member is detachably attached to the built-in unit by engaging the claw portion protruding from the outer surface and the hole portion provided in the built-in unit, and the second auxiliary member is attached to the outside. The switchgear according to claim 1, wherein the switchgear is detachably attached to the housing by engaging the claw portion protruding from the side surface and the hole portion provided in the housing. Wherein the first auxiliary member switchgear according to claim 1 or claim 2, characterized in that the lower surface of the wheel is mounted in front Kigumikomi unit at a higher position than the lower surface of the built-unit .. An upward protruding portion and a downward protruding portion are formed on the claw portion protruding from the outer surface of the first auxiliary member, and the downward protruding portion is the first auxiliary in a state where the built-in unit is placed on a flat surface. When the member is mounted, it engages with the lower end edge of the hole of the built-in unit, and the wheel of the first auxiliary member mounted on the built-in unit is the second wheel of the upward protrusion. The switch gear according to claim 2, wherein the switch gear engages with the upper end edge portion of the hole portion of the built-in unit when being supported by the auxiliary member of the above. Claws are provided at the four corners of the back surface of the built-in unit, which are end faces on the insertion side, and each of the claws is inserted into a slit hole provided in the housing to fix the built-in unit inside the housing. The switchgear according to any one of claims 1 to 4, wherein the switchgear is characterized. The switchgear according to claim 5, wherein the claw portion of the built-in unit is provided with a tapered portion for reducing the tip portion, and the slit hole is provided corresponding to the base portion of the claw portion. The claw portion of the built-in unit is provided with an engaging tapered portion that lifts the built-in unit upward by engaging with the lower end edge portion of the slit hole, and the claw portion is fitted into the slit hole. The switch gear according to claim 5 or 6, wherein a holding base for holding the built-in unit in an upper position is provided. The upper end edge portion and the lower end edge portion are reinforced at the upper end edge portion and the lower end edge portion of the hole portion in the built-in unit to which the claw portion provided on the first auxiliary member engages. The switchgear according to claim 2, wherein a beaded portion is provided. The built-in unit is provided with a main circuit chamber into which the built-in unit is inserted and mounted, and a control chamber attached and connected to the front side of the main circuit chamber so that the control chamber can be separated from the main circuit chamber. The switchgear according to any one of claims 1 to 8, wherein the control chamber is attached to the main circuit chamber after the unit is inserted.

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