JP2006042503A - Auxiliary tool for opening and closing shutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary tool of simple structure for opening and closing a shutter, with which the shutter in a switchgear can be opened and closed in safety. <P>SOLUTION: The auxiliary tool for opening and closing a shutter is constructed of: pressing portions 35 that act on an opening/closing link mechanism 16; fulcrums 34 that are positioned at a predetermined distance from the pressing portions 35 and are brought into contact with the bottom of the switchgear body 10; and handle bars 31 that are attached between the fulcrums 34 and the pressing portions 35 and are extended substantially perpendicularly to the lines connecting the fulcrums 34 and the pressing portions 35. The shutter 15 is opened as follows: with a truck-type circuit breaker 20 drawn out of the switchgear body 10, the handle bars in upright position are inserted into the switchgear body 10; the pressing portions 35 are abutted against the lower part of the opening/closing link mechanism 16; and the handle bars 31 are inclined to move the pressing portions 35 upward on the fulcrums 34. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an auxiliary tool for opening and closing a shutter, which is used when opening and closing a shutter disposed in front of a disconnection portion, for example, when a phase detection test is performed in a switchgear.

For example, a metal-clad switchgear includes a switchgear body in which a bus, a cable, a connection conductor, and a disconnection part are housed in a housing, and a drawer-type circuit breaker provided so as to be drawn out with respect to the switchgear body Have
The switch gear is provided with a shutter made of an insulating member so as to be openable and closable in front of the disconnection portion in order to prevent the disconnection portion from being exposed when the drawer type circuit breaker is pulled out. When the drawer type circuit breaker is inserted into the switchgear body, the shutter is opened, and when the drawer type circuit breaker is pulled out from the switchgear body, the shutter closes the front of the disconnector. When conducting the phase detection test, pull out the drawer type circuit breaker.
For example, Japanese Patent Application Laid-Open No. H10-228707 discloses a phase detection test in a switch gear.
JP 11-252719 A

What is described in Patent Document 1 is a drawer type phase tachometer in which a phase tachometer for phase detection test is mounted on a drawer cart having the same structure as that of the drawer type circuit breaker. Thus, after the drawer type circuit breaker is pulled out from the switchgear main body, the drawer type phase tachometer is inserted to open the shutter.
Therefore, according to what is described in Patent Document 1, it is not necessary to open a shutter by an operator entering the vicinity of the disconnection portion after the drawer circuit breaker is pulled out, and danger can be avoided. This Patent Document 1 does not disclose any mechanism for opening and closing the shutter.
Moreover, in the switchgear shown in Patent Document 1, the phase tachometer must be mounted on the pulling cart, which makes the structure of the phase tachometer complicated and expensive. .

For this reason, conventionally, when performing a phase detection test of a switch gear, after the drawer circuit breaker is pulled out from the switch gear body, the shutter opening / closing link mechanism is manually operated to open the shutter.
For example, as shown in FIGS. 14 and 15, shutter opening / closing link mechanisms c and c (only one is shown in the figure, but arranged on the left and right sides) arranged in the circuit breaker chamber b of the switch gear a. )), The jack f is set to the rotating arms d and d via the bar e, and the shutter g is opened by the jack f.
According to this method, after an operator enters the circuit breaker chamber and sets the jack f and the bar e (see FIG. 14), the operator rod leaves the circuit breaker chamber b and then the operation rod (not shown). The jack f can be lifted up (see FIG. 15). In other words, the shutter g is not opened when the worker is in the circuit breaker chamber, and when the shutter g is opened, the worker can leave the circuit breaker chamber b, Risk can be reduced.

However, in the method of opening and closing the shutter using the jack f, although the shutter g is in a closed state, an operator must enter the circuit breaker chamber b, which is dangerous. There is.
In addition, since the circuit breaker chamber b is usually small, workability is poor, and it takes time to set the jack f and the bar e, and there is a problem that it takes time for the phase detection test.

  The present invention has been developed to solve such problems. That is, the object of the present invention is to provide a pressing portion for operating the shutter opening / closing mechanism at the tip of the handlebar and to use the lever principle to open and close the shutter in the switch gear safely and with a simple structure. It is to provide an auxiliary tool for opening and closing a shutter that can be performed in the above.

In order to solve the above-mentioned problems, the invention of claim 1 is directed to a switchgear main body (10), a pull-out type circuit breaker (20) provided so as to be drawable with respect to the switchgear main body (10), and a switchgear main body. (10) used in a switchgear (1) having a shutter (15) for opening / closing the front of the disconnector (6) in the inside and an opening / closing link mechanism (16) for opening / closing the shutter (15). A shutter opening / closing auxiliary tool (30) for opening and closing (15), the pressing portion (35) acting on the opening / closing link mechanism (16), and the switch located at a predetermined distance from the pressing portion (35) A fulcrum part (34) in contact with the bottom of the gear body (10), and the fulcrum part (34) and the pressing part (35) are attached between the fulcrum part (34) and the pressing part (35). Direction almost perpendicular to the connected line An extending handlebar (31), and with the pull-out type circuit breaker (20) pulled out from the switchgear body (10), the handlebar is raised and inserted into the switchgear body (10). The pressing portion (35) is brought into contact with the lower portion of the opening / closing link mechanism (16) and the handle bar (31) is tilted to move the pressing portion (35) upward with the fulcrum portion (34) as a fulcrum. The shutter (15) is configured to be opened.
In the invention of claim 2, the pressing portion (35) is a pressing roller (35), the pressing roller (35) and the fulcrum portion (34) are provided on a bracket (32), and the bracket (32 ), The handle bar (31) is attached.
In the invention of claim 3, the fulcrum part (34) is a wheel (34), the wheel (34) and the pressing part (35) are provided in the bracket (32), and the bracket (32) is provided with the The handle bar (31) is attached.
According to a fourth aspect of the present invention, the handle bar (31) is pivotably attached to the bracket (32) within a predetermined angle range, and the handle side end of the handle bar (31) contacts the ground. In this state, the line connecting the pressing portion (35) and the fulcrum portion (34) is inclined from the vertical to the handlebar (31) side.
According to a fifth aspect of the present invention, the handle bar (31) comprises a plurality of bars, each bar is connectable in the axial direction, and a fixing means (31a) for fixing the connected state is provided. It is characterized by that.
The invention of claim 6 is characterized in that the handle bar (31) is detachably attached to the bracket (32).
The invention of claim 7 is characterized in that there are two brackets (32) on the left and right, and two brackets (32) are connected by a connecting bar (33).
According to an eighth aspect of the present invention, the connecting bar (33) is a hollow member, and both ends of the connecting bar (33) are fitted to mounting portions (32a) formed on the bracket (32), thereby connecting the bar (33). ) And the mounting portion (32a) are adjustable, and the connecting bar (33) and the mounting portion (32a) are fixed by a set screw (33a). .

According to the first aspect of the present invention, since the pressing portion and the fulcrum portion acting on the opening / closing link mechanism are provided at the tip of the handle bar, the shutter opening / closing auxiliary tool can be set even if the worker does not approach the disconnection portion. In addition, if the handle bar is tilted around the fulcrum portion after the pressing portion is applied to the opening / closing link mechanism, the opening / closing link mechanism can be operated very easily by the lever principle to open the shutter. it can.
According to the second aspect of the present invention, since the pressing portion of the shutter opening / closing auxiliary tool is a pressing roller, the setting of the shutter opening / closing auxiliary tool and the frictional resistance when moving the opening / closing link mechanism can be reduced and the operation is performed. Does not require much effort.
According to the invention of claim 3, since the fulcrum part of the shutter opening / closing auxiliary tool is a wheel, the setting of the shutter opening / closing auxiliary tool and the frictional resistance when moving the opening / closing link mechanism can be reduced. Does not require a great deal of effort.
According to the invention of claim 4, the line connecting the pressing portion and the fulcrum portion is tilted from the vertical to the handlebar side in a state where the handheld side tip portion of the handlebar is in contact with the ground. The opening / closing link mechanism and the shutter's own weight always act on the bracket in the direction in which the pressing part tilts toward the handlebar, thereby stabilizing the open state of the shutter and raising the handlebar in an unexpected state. Can prevent accidents.
In addition, since the handlebar is pivotably attached to the bracket within a range of a predetermined angle, the orientation of the bracket is further increased than when the handlebar end of the handlebar is in contact with the ground artificially. Tilt to the handlebar side. This further stabilizes the open state of the shutter and further prevents accidents such as raising the handlebar.
According to the invention of claim 5, the length of the handlebar can be adjusted in accordance with the size of the circuit breaker chamber of various switchgears of different sizes, and the shutter opening / closing auxiliary tool is versatile. can do.
According to the invention of claim 6, the shutter opening / closing auxiliary tool can be disassembled to be portable.
According to the invention of claim 7, since the pressing portion and the fulcrum portion are on the left and right sides, the shutter opening / closing auxiliary tool can be used in a stable state, and the work efficiency can be improved.
According to invention of Claim 8, since the fitting amount of a connection bar and an attachment part was made adjustable, according to the magnitude | size of the circuit breaker chamber of various switchgear from which magnitude | size, the space | interval of a right-and-left bracket was made. It can be adjusted as appropriate, and the shutter opening / closing auxiliary tool can be made versatile.

  The purpose of safely opening and closing the shutter in the switchgear is achieved by using a shutter opening and closing auxiliary tool with a simple structure that uses the lever principle to provide a pressing part that operates the shutter opening and closing mechanism at the tip of the handlebar did.

1 is a side view showing the entire switch gear, FIGS. 2 to 4 are side views for sequentially explaining how the circuit breaker is inserted into the switch gear body, and FIGS. 5 and 6 are front views showing opening and closing of the shutter. is there.
The structure of the switch gear 1 will be described before the shutter opening / closing auxiliary tool is described.

As shown in FIG. 1, the switchgear 1 includes a switchgear main body 10 in which a bus bar 3, a cable 4, a connection conductor 5, a disconnecting part 6, and the like are housed in a housing 2, and the switchgear main body 10. It comprises a drawer type circuit breaker 20 provided so as to be freely drawn out.
The switchgear body 10 is partitioned by a partition plate 11 into a busbar chamber 12 for storing the busbar 3, a circuit breaker chamber 13 for storing the drawer type circuit breaker 20, a cable chamber 14 for storing the cable 4, and the like. A door body (not shown) is formed on the portion of the housing 2 where the container 20 is inserted and removed.
The disconnecting portion 6 has an upper disconnecting portion and a lower disconnecting portion, both of which are accommodated in the cable chamber 14 and are provided so that the front portions thereof face the circuit breaker chamber 13 through openings 11a and 11a formed in the partition plate 11, respectively. It has been. Although not shown in FIGS. 1 to 4, three-phase disconnecting portions 6, 6,... Are provided in a direction orthogonal to the paper surface in each drawing.
Further, shutters 15 and 15 are disposed on the circuit breaker chamber 13 side of the openings 11 a and 11 a so as to cover the front of the disconnecting portion 6. The shutters 15 and 15 are provided so as to be movable up and down by an opening / closing link mechanism 16, whereby the shutters 15 and 15 open and close the openings 11a and 11a.

  As shown in FIGS. 2 to 4, the opening / closing link mechanism 16 includes a pivot arm 16 a that is operated by pulling out and inserting the drawer-type circuit breaker 20, and a lift arm that is actuated by the pivot arm 16 a and moves up and down. 16b and a rotating arm 16a that supports the shutter 15 on a part of the housing 2. Further, as shown in FIGS. 5 and 6, such an open / close link mechanism 16 is disposed on both the left and right sides of the shutters 15 and 15 and on both the left and right sides in the circuit breaker chamber 13.

The rotation arm 16a has a rotation fulcrum on the front surface side of the circuit breaker chamber 13, and the rear end (partition plate 11 side) is a rotation end.
The rotating arm 16a is composed of three pieces, a base end piece, an intermediate piece, and a tip piece. The base end piece and the tip piece are substantially parallel, and the rear end portion of the base end piece and the front end portion of the tip piece. The intermediate piece is positioned diagonally so as to span the line.
The lower end portion of the elevating arm 16b is connected to the rotating end of the rotating arm 16a, and the elevating arm 16b moves up and down as the rotating arm 16a rotates. In addition, shutters 15 and 15 are attached to the upper part of the lifting arm 16b.
The support arm 16c is rotatably supported in the vicinity of the openings 11a and 11a of the partition plate 11, and the shutter 15 is attached to the rotation end.
When the rotating arm 16a is rotated, the elevating arm 16b is raised and lowered to raise and lower the shutters 15 and 15, and the shutters 15 and 15 are raised and lowered in front of the openings 11a and 11a of the partition plate 11 by the support arm 16c. To be regulated. As a result, the openings 11a and 11a are opened and closed by the shutters 15 and 15 with the rotation of the rotation arm 16a, so that the disconnecting portions 6 and 6 are visible and hidden.
Further, rails 17 and 17 made of channel steel are provided below the left and right opening and closing link mechanisms 16 and 16, and the opening surfaces of the rails 17 and 17 are arranged so as to face each other.

As shown in FIGS. 2 to 4, the pull-out type circuit breaker 20 includes a cart unit 21 and a circuit breaker 22 mounted on the cart unit 21, and the cart unit 21 is provided with wheels 21 a and 21 a at the lower side. Further, a pressing roller 21b that presses the rotating arm 16a is provided on the side surface.
Such a drawer type circuit breaker 20 can be easily inserted into and removed from the circuit breaker chamber 13 by fitting the wheels 21a and 21a to rails 17 and 17 provided at the lower part of the circuit breaker chamber 13, respectively. It has become.
When the pull-out type circuit breaker 20 is inserted into the circuit breaker chamber 13 of the switchgear main body 10, the pressing roller 21b on the side surface first comes into contact with the intermediate piece of the rotation arm 16a of the opening / closing link mechanism 16, and the rotation arm 16a. Rotate. When the drawer-type circuit breaker 20 is further inserted, the pressing roller 21b enters under the tip piece of the rotating arm 16a, thereby stopping the rotation of the rotating arm 16a.
As shown in FIGS. 4 and 6, when the pivot arm 16a pivots, the elevating arm 16b is pushed upward, and the shutters 15 and 15 are moved upward to open the openings 11a and 11a of the partition plate 11. The Thereby, the disconnecting parts 6 and 6 are exposed to the circuit breaker chamber 13 side.
Further, when the drawer type circuit breaker 20 is inserted into the circuit breaker chamber 13, the external contact of the circuit breaker 22 is inserted into the exposed disconnecting portions 6 and 6.

7 is an overall perspective view of the shutter opening / closing auxiliary tool 30, FIG. 8 is an enlarged front view of the bracket, FIGS. 9 and 10 are side views showing a state in which the shutter is opened, and FIG. 11 shows a state in which the shutter is opened. It is an enlarged side view of a bracket.
As shown in FIG. 7, the shutter opening / closing auxiliary tool 30 includes left and right handlebars 31, 31 extending in the front-rear direction, brackets 32, 32 attached to the distal ends of the handle levers 31, 31, The connecting bar 33 is installed between the brackets 32 and 32, and the wheel 34 and the pressing roller 35 are provided on the bracket 32.
The handle bar 31 is divided into two at an intermediate portion thereof, and one bar is fitted in the axial direction with respect to the other bar, and both bars can be fixed by a set screw 31a. Thereby, the handle bar 31 can be divided into two parts, and is configured to be stretchable as a whole. Thereby, the length of the handle bar 31 can be adjusted in accordance with the size of the circuit breaker chamber 13 of the switch gear 1 having a different size.
The entire length of the handle bar 31 is sufficiently longer than the length of the circuit breaker chamber 13 in the front-rear direction. Thereby, when it is going to open the shutter 15 using the said shutter opening / closing auxiliary | assistant tool 30, it becomes unnecessary for an operator to enter the circuit breaker chamber 30. FIG.

As shown in FIG. 11, the bracket 32 is formed of a substantially rectangular plate-like member, and a wheel 34 is supported at one end in the longitudinal direction and a pressing roller 35 is rotatably supported at the other end. Both the wheel 34 and the pressing roller 35 are provided on the outer surface of the bracket 32 so that the respective rotation axes are orthogonal to the plate surface.
Further, the tip end portion of the handle bar 31 is supported on the inner side surface of the bracket 32 so as to be rotatable within a range of a predetermined angle, and roughly, the handle bar 31 and the longitudinal direction of the bracket 32 are substantially perpendicular to each other. It is like that. The handle bar 31 is rotatably supported with respect to the bracket 32 in order to stabilize the state where the rotating arm 16a is lifted by the shutter opening / closing auxiliary tool 30. Details of this point will be described later.
As shown in FIG. 8, mounting portions 32 a and 32 a made of a rod member extending in a direction orthogonal to the plate surface are provided at substantially central portions of the inner surfaces of the left and right brackets 32 and 32. When both end portions of the connecting bar 33 are externally fitted to the mounting portions 32a and 32a, the left and right handle bars 31 and 31 and the brackets 32 and 32 are integrally configured. In addition, the distance between the left and right brackets 32 and 32 can be adjusted by adjusting the amount of insertion between the both ends of the connecting bar 33 and the mounting portions 32a and 32a. Furthermore, set screws 33a and 33a are provided in these connecting portions, and the distance between the left and right brackets 32 and 32 can be fixed. In order to adjust the distance between the left and right brackets 32 and 32, the connecting bar 33 itself can be used in addition to the adjustment of the fitting amount of the connecting bar 33 and the mounting pieces 32a and 32a as described above. You may make it extend freely.

The wheel 34 and the pressing roller 35 are formed to have substantially the same size and shape as the wheel 21a and the pressing roller 21b of the drawer type circuit breaker 20, and the distance between the wheel 34 and the pressing roller 35 is the drawer type blocking. It is provided so as to be slightly larger than the distance between the wheel 21a of the container 20 and the pressing roller 21b. If the distance between the wheel 34 and the pressing roller 35 can be adjusted, the shutter 15 can be opened and closed in the switchgear 1 having different sizes, and the shutter opening / closing auxiliary tool 30 having high versatility can be obtained. can do.
As shown in FIG. 8, the pressing roller 35 has a substantially cylindrical shape. The proximal end side is formed in the large diameter portion 35 a and the distal end side is formed in the small diameter portion 35 b from the substantially center in the axial direction. A flange portion 35c having the same diameter as the large-diameter portion 35a is integrally formed at the distal end portion. When the rotating arm 16a is pressed by the pressing roller 35, even if the small diameter portion 35b of the pressing roller 35 presses the lower edge of the rotating arm 16a and the shutter opening / closing auxiliary tool 30 is slightly displaced, the rotating arm 16a Will not be disengaged from the large-diameter portion 35a and the flange portion 35c of the pressing roller 35, and will be reliably pressed.
On the inner side surface of the bracket 32, in the vicinity of the portion where the handle bar 31 is attached, rotation stop pieces 36 and 36 for restricting the rotation angle of the handle bar 31 are provided. Thereby, the handle bar 31 can be rotated within a range of a predetermined angle with respect to the bracket 32.
In such a shutter opening / closing auxiliary tool 30, the handle bars 31, 31 and the connecting bar 33 are detachably attached to the brackets 32, 32, and the handle bars 31, 31 can be disassembled into two. So you can carry them in a disassembled state.

Next, as shown in FIGS. 9 and 10, the opening / closing operation of the shutter 15 of the switch gear 1 will be described using the shutter opening / closing auxiliary tool 30 configured as described above.
First, the drawer type circuit breaker 20 is pulled out from the circuit breaker chamber 13 of the switchgear main body 10. At this time, the shutters 15 and 15 close the openings 11a and 11a of the partition plate 11, and the disconnecting portions 6 and 6 cannot be seen.
Next, the shutter opening / closing auxiliary tool 30 is inserted into the circuit breaker chamber 13. At this time, the wheels 34, 34 are fitted to the rails 17, 17 provided at the left and right lower portions of the circuit breaker chamber 13. As a result, when the shutter opening / closing auxiliary tool 30 is inserted into the circuit breaker chamber 13, the frictional resistance is reduced and smooth operation can be performed.
Further, the handle bars 31, 31 are inserted at an angle of about 45 to 60 degrees when viewed from the side. Note that the angle of 45 to 60 degrees is included in the concept of “a state where the handlebar is raised” in the claims (claim 1). Although this angle is arbitrary, if this angle is increased, the pressing roller 35 can be positioned below the tip piece of the rotating arm 16a, and the rotating arm 16a can be rotated only by tilting the handle bar 31. In this case, the handle side portion of the handle bar 31 approaches the circuit breaker chamber 13, and an operator must approach the circuit breaker chamber 13.

On the other hand, if the angle of the handle bar 31 is reduced, the worker does not have to approach the circuit breaker chamber 13, but the pressing roller 35 can be brought into contact only with the intermediate piece of the rotating arm 16a. In order to rotate the arm 16a, it is necessary to further push in the shutter opening / closing auxiliary tool 30, and a great force is required to push in the arm 16a.
The shutter opening / closing auxiliary tool 30 is further inserted from the state in which the handle bar 31 has a small angle and the pressing roller 35 is in contact with the intermediate piece of the rotating arm 16a. Thereby, the rotating arm 16a pressed by the pressing roller 35 is rotated upward, and the pressing roller 35 can be brought into the lower side of the distal end piece of the rotating arm 16a.
In addition, when the handle bar 31 has a relatively large angle and the pressing roller 35 is hidden under the tip of the rotating arm 16a, the shutter opening / closing assist tool 30 is further inserted, and the handle bar 31 is also inserted. Is tilted to the front side, the rotation arm 16 a can be rotated upward by the pressing roller 34.
As described above, in the first embodiment, since the shutter opening / closing assist tool 30 is provided with the pressing roller 34 at the contact portion (pressing portion) of the rotating arm 16a, the frictional resistance is reduced and the shutter opening / closing assist is smoothly performed. The tool 30 can be inserted into the circuit breaker chamber 13.

And in the state where the line which connects the rotation center of the pressing roller 35 of the bracket 32 and the rotation center of the wheel 34 became vertical, it is the state which rotated the rotation arm 16a most upwards, and this state is The shutters 15 and 15 are in the most raised state.
As shown in FIG. 11, when the line connecting the rotation center of the pressing roller 35 and the rotation center of the wheel 34 is vertical, the handlebars 31 and 31 are further rotated in a direction in which the handlebars 31 are brought into contact with the ground. The dead weight of the mechanism 16 and the shutters 15 and 15 acts as a force that causes the upper portion of the bracket 32 (the one where the pressing roller 35 is located) to fall forward. The force to try to tilt the bracket 32 toward the front side eventually prevents the rotation stop piece 36 from coming into contact with the handle bar 31 and prevents the bracket 32 from tilting.
Thereby, the bracket 32 is stabilized in a state in which the pressing roller 35 is positioned slightly on the near side from a state where a line connecting the rotation center of the pressing roller 35 and the rotation center of the wheel 34 is vertical. Such a state is a state in which the rotating arm 16a is lifted and a state in which the shutter 15 is opened.

In such a state, the bracket 32 does not rotate so that the pressing roller 35 is tilted to the back side, and the shutter 15 is closed in an unexpected state and the handle bar 31 is raised. Can be prevented.
In addition, since the handlebar is pivotably attached to the bracket within a range of a predetermined angle, the orientation of the bracket is further increased than when the handlebar end of the handlebar is in contact with the ground artificially. Tilt to the handlebar side. For this reason, the opened state of the shutter 15 can be further stabilized, and accidents such as the handlebar 31 rising can be further prevented.
Although illustration is omitted, if a rubber grip for preventing slippage is provided at the handle side end of the handle bar 31, the shutter opening / closing auxiliary tool 30 is prevented from moving while the rubber grip is in contact with the ground. It is possible to further stabilize the open state of the shutter 15.
Moreover, if the specific gravity of the handle side end of the handle bar 31 is made of a member heavier than other parts, or if a weight member is separately attached, the tilted state of the handle bar 31 can be stabilized. .

Thus, by using such a shutter opening / closing auxiliary tool 30, an operator does not enter the circuit breaker chamber 13 of the switchgear main body 10, and the shutter opening / closing auxiliary tool 30 is moved to the rotation arm of the opening / closing link mechanism 16. Since it can set to 16a, it can work without approaching the disconnection part 6 of the switchgear 1, and is safe.
In addition, the shutter opening / closing auxiliary tool 30 can operate the opening / closing link mechanism 16 by using the lever principle to open the shutters 15 and 15 without requiring much labor.
In the first embodiment, the two handlebars 31 and 31 and the two brackets 32 and 32 have been described. This is because the shutter opening / closing link mechanism is provided in the circuit breaker chamber 13 on both the left and right sides. The present invention is not limited to this, and when the shutter opening / closing mechanism is provided only on one side of the circuit breaker chamber 13, only one bracket 32 is provided. You may make it the structure which has. Also in this case, when two wheels 34 are provided, a stable operation can be performed when the opening / closing link mechanism 16 is operated.

Moreover, in the said Example 1, although the wheel 34 was used as a fulcrum part and the press roller 35 was used as a press part, this invention is not limited to this, A wheel and / or a press roller are not provided. The lower end edge of the bracket 32 may be formed as a curved edge to be a fulcrum portion, or the upper end edge of the bracket 32 may be formed as a curved edge to be a pressing portion.
Furthermore, in the first embodiment, the wheels 34 and 34 are fitted to the rails 17 and 17 provided in the switchgear 1. However, the present invention is not limited to this, and the bottom surface of the circuit breaker chamber 13 is rolled. You may make it provide the wheel which moves.

FIG. 12 is a plan view of the shutter opening / closing auxiliary tool according to the second embodiment.
The shutter opening / closing assist tool 30A according to the second embodiment has a single handle bar.
The handle bar 31A of the shutter opening / closing auxiliary tool 30A is attached to substantially the center in the width direction of the connecting bar 33 (see FIG. 12).
According to the shutter opening / closing auxiliary tool 30A, the structure can be further simplified, and an inexpensive one can be provided.

FIG. 13 is a plan view of the shutter opening / closing auxiliary tool according to the third embodiment.
The shutter opening / closing auxiliary tool 30B of the third embodiment is constructed by linking a connecting bar 33B different from the connecting bar 33 at the tip between the two handle bars 31 (see FIG. 13).
According to the shutter opening / closing auxiliary tool 30B, the two handle bars 31, 31 and the two connecting bars 33, 33B can prevent the entire tool from being twisted, and can perform a stable operation.

  The phase detection test after the shutters 15 and 15 are opened by the shutter opening / closing auxiliary tool 30 of the present invention enters the breaker chamber 13 using a known rod-shaped high-pressure phase detector (not shown). Without doing so, the high voltage phase detector is inserted into the disconnecting portions 6 and 6 from the outside of the switchgear main body 10.

  The present invention is not limited to the metal clad type. The present invention can also be applied to a so-called cubicle type switchgear. Furthermore, although it applied to the switch gear of 1 step | paragraph structure, it can apply also to the switch gear of a multi-step stack structure.

It is a side view which shows the whole switchgear structure. It is a side view which shows a mode that a drawer type circuit breaker is inserted in a switchgear main body. It is a side view which shows the step in the middle of inserting a drawer type circuit breaker. It is a side view which shows the state which inserted the drawer type circuit breaker. It is a front view of the circuit breaker room of the state where the shutter was obstruct | occluded. It is a front view of the circuit breaker room of the state where the shutter was opened. It is a perspective view of a shutter opening / closing auxiliary tool. It is a front view which expands and shows a bracket. It is a side view which shows a mode that the shutter opening / closing auxiliary tool was set. It is a side view which shows a mode that the shutter was open | released with the shutter opening / closing auxiliary tool. It is a side view of the bracket which expands and shows the state which opened the shutter. It is a top view of the shutter opening / closing auxiliary tool concerning Example 2. FIG. FIG. 6 is a plan view of a shutter opening / closing auxiliary tool according to a third embodiment. It is a schematic side view which shows a mode that a shutter is open | released by the conventional method. It is a schematic side view which shows a mode that the shutter was open | released by the conventional method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Switch gear 2 Housing | casing 3 Bus | bath 4 Cable 5 Connection conductor 6 Disconnection part 10 Switch gear main body 11 Partition board 11a Opening 12 Bus bar room 13 Circuit breaker room 14 Cable room 15 Shutter 16 Opening / closing link mechanism 16a Turning arm 16b Lifting arm 16c Support Arm 17 Rail 20 Pull-out type circuit breaker 21 Cart unit 21a Wheel 21b Press roller 22 Circuit breaker 30 Opening / closing auxiliary tool 31 Handle bar 31a Set screw 32 Bracket 32a Mounting portion 33 Connecting bar 33a Set screw 34 Wheel 35 Press roller 36 Rotation stop piece 30A Shutter opening / closing auxiliary tool 31A Handle bar 30B Shutter opening / closing auxiliary tool 33B Connecting bar

Claims (8)

The switchgear main body (10), the pull-out type circuit breaker (20) provided so as to be able to be pulled out with respect to the switchgear main body (10), and the front of the disconnector (6) in the switchgear main body (10) are opened and closed A shutter opening / closing auxiliary tool (30) used for a switchgear (1) having a shutter (15) for opening and closing and opening / closing link mechanism (16) for opening and closing the shutter (15). There,
A pressing portion (35) acting on the opening / closing link mechanism (16), a fulcrum portion (34) positioned at a predetermined distance from the pressing portion (35) and in contact with the bottom of the switchgear body (10), A handlebar (31) attached between the fulcrum part (34) and the pressing part (35) and extending in a direction substantially perpendicular to a line connecting the fulcrum part (34) and the pressing part (35). And consists of
With the pull-out type circuit breaker (20) pulled out from the switchgear main body (10), the handle bar is put up and inserted into the switchgear main body (10), and the pressing portion (35) is connected to the open / close link mechanism. By abutting the lower part of (16) and tilting the handle bar (31), the pressing part (35) is moved upward with the fulcrum part (34) as a fulcrum, thereby opening the shutter (15). Configured as
A shutter opening / closing auxiliary tool characterized by that. The pressing portion (35) is a pressing roller (35), the pressing roller (35) and the fulcrum portion (34) are provided on a bracket (32), and the handle bar (31) is mounted on the bracket (32). ) Was attached,
The shutter opening / closing auxiliary tool according to claim 1. The fulcrum part (34) is a wheel (34), the wheel (34) and the pressing part (35) are provided on the bracket (32), and the handle bar (31) is attached to the bracket (32). Worn,
The shutter opening / closing assist tool according to claim 1 or 2, wherein the shutter opening / closing assist tool is provided. The handlebar (31) is pivotally attached to the bracket (32) within a predetermined angle range, and the pressing portion is in a state where the handle side end of the handlebar (31) is in contact with the ground. The line connecting the part (35) and the fulcrum part (34) tilts toward the handlebar (31) side from the vertical.
The shutter opening / closing auxiliary tool according to claim 2 or claim 3, wherein The handle bar (31) is composed of a plurality of bars, each bar can be connected in the axial direction, and a fixing means (31a) for fixing the connected state is provided.
The shutter opening / closing assist tool according to any one of claims 1 to 4, wherein the shutter opening / closing assist tool is provided. The handle bar (31) is detachably attached to the bracket (32).
The shutter opening / closing auxiliary tool according to any one of claims 2 to 5, wherein The bracket (32) has two on the left and right, and the two brackets (32) are connected by a connecting bar (33).
The shutter opening / closing assist tool according to any one of claims 2 to 6, wherein the shutter opening / closing assist tool is provided. The connecting bar (33) is a hollow member, and both end portions of the connecting bar (33) are fitted to mounting portions (32a) formed on the bracket (32) to connect the connecting bar (33) and the mounting portion (32a). The fitting amount of the connecting bar (33) and the mounting portion (32a) are fixed by a set screw (33a).
The shutter opening / closing auxiliary tool according to claim 7.