JP3418129B2 - Switchgear - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing device for closing an opening of a shielded portion with a shielding sheet .

[0002]

2. Description of the Related Art Conventionally, for example, a screen device for preventing the spread of fire as described in Japanese Patent Laid-Open No. 10-258133 for partitioning a corridor of a building, a screen device for a doorway of a cold storage warehouse, etc. There is known a screen device that closes the opening of the portion with a flexible sheet-like shielding sheet.

In this type of screen device, for example, a vertical groove is formed on the side wall surface of the corridor at a position which becomes an opening for partitioning the corridor to be shielded and partially shielding the corridor. A pair of guide rails each having a circular guide groove are provided facing each other. In addition, a winding device having a winding portion axially supported along the width direction of the corridor is provided on the ceiling of the corridor which is the upper edge of the opening of the shielded portion where the guide rail is located. There is. This winding device is a flexible sheet-like shielding sheet formed of a flame-retardant resin or the like that is guided by engaging both side edges in the vertical direction with the guide groove of the guide rail to shield the corridor. Attach the upper edge of the to the winding part, and wind and rewind the shielding sheet. In addition, the bottom edge of the shielding sheet is provided with an edge that comes into contact with the floor surface of the corridor, which is the lower edge of the opening of the shielded portion, and the shielding sheet does not curl due to the weight of this edge, so It is designed to be shielded.

[0004]

However, in the screen device as described above, for example, a heat load is applied to the shielding sheet so that the shielding sheet shrinks or both sides of the shielding sheet in which the opening of the shielded portion is closed are closed. Causing a pressure difference,
Wind pressure may be applied to one side of the shielding sheet, causing the shielding sheet to slacken in an arc shape with a force greater than the weight of the edge portion, causing the edge portion to lift and separate from the floor surface, making it impossible to shield the shielded portion. is there.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an opening / closing device capable of reliably maintaining the shielded state of the shielded portion without forming a gap.

[0006]

A switchgear according to a first aspect of the present invention has a flexibility capable of closing an opening opening to a shielded portion.
A sheet-like shielding sheet, provided on the lower edge of the shielding sheet, and a water drainage portion which abuts against the lower edge of the opening, before
It is provided between the shielding sheet and the draining part,
An expandable and contractible member that extends in the vertical direction when a downward force is applied by the weight of the cut portion ,
The drainage part comes into contact with the lower edge of the opening part to form the shielding sheet.
When the opening is blocked by
A force was applied to the seat to lift the drainer.
In this case, the elastic member that has contracted expands, and
The contact state of the recess with the lower edge of the opening is maintained .

According to a second aspect of the present invention, there is provided an opening / closing device which is opened on a shielded portion.
A flexible sheet-shaped shield that can close the mouth opening
The cover sheet is provided on the lower edge of the cover sheet and the opening sheet.
The draining part that comes into contact with the lower edge of the mouth and the shielding sheet
Positioned between the scraped weight part and the draining part and the weight part
However, downward force due to the weight of the drainage part may act.
And an elastic member that expands and contracts in the vertical direction
The drainer is in contact with the lower edge of the opening,
With the shielding sheet that is stretched by the weight of the weight
When the opening is closed, the shielding sheet is
When a force in the direction of lifting the drainer is applied to the
In addition, the weight was lifted and contracted.
Under the opening of the draining part, the elastic member extends
The contact state with the edge is maintained.

According to a third aspect of the present invention, there is provided an opening / closing device which is opened on a shielded portion.
A flexible sheet-shaped shield that can close the mouth opening
The cover sheet is provided on the lower edge of the cover sheet and the opening sheet.
The draining part that abuts the lower edge of the mouth and the bottom of the shielding sheet.
Formed by a part of the lower part due to the weight of the draining part
Can be expanded and contracted in the vertical direction by applying force to
And a flexible sheet-shaped elastic member,
Abut on the lower edge of the opening, and use the shielding sheet to open the opening.
When the part is closed,
When a force is applied to lift the drainage part, it contracts.
The elastic member, which had been
The contact state with the lower edge of the mouth is maintained.

According to a fourth aspect of the present invention, there is provided an opening / closing device which is opened on a portion to be shielded.
A flexible sheet-shaped shield that can close the mouth opening
The cover sheet is provided on the lower edge of the cover sheet and the opening sheet.
The draining part that comes into contact with the lower edge of the mouth and the shielding sheet
It is formed by the scraped weight part and a part of the lower part of the shielding sheet.
Located between the water draining portion and the weight portion, the water
Due to the downward force exerted by the weight of the cut
An expandable elastic member that extends downward,
The weight of the weight part when the draining part contacts the lower edge of the opening part.
With the shielding sheet in the state of being stretched by
When the water is blocked,
If a force is applied to lift the cut, the weight
The part is lifted and the weight part creates a bellows shape.
The stretchable member that has been contracted expands and
The contact state with the lower edge of the opening is maintained.

According to a fifth aspect of the present invention, there is provided an opening / closing device which is opened on a shielded portion.
A substantially flat shielding sheet that can close the opening
Is provided on the lower edge of the shielding sheet of the
At least a part of the draining part and the shielding sheet that contact
Provided, the downward force due to the weight of the drainage part acts
And an extension means that extends in the vertical direction by
However, the shielding sheet is a flexible sheet-shaped composite sheet.
It is composed of a number of sheet members, which are upper and lower
The side edges with respect to the direction are provided so that they overlap each other.
Evacuation through the openings between overlapping sheet members
The mouth is formed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 5, reference numeral 1 denotes a screen device as an opening / closing device. The screen device 1 includes an opening 3 of a shielded portion 2, for example, a corridor of a building or a door opening of a room, an entrance / exit of a building or an emergency exit. Such as openings or fire protection
A pair of guide rails 4 and 4 that are installed opposite to each other are provided on both side wall portions of the corridor that are opening edges such as openings at locations where it is necessary to partition areas such as smokeproof fireproof compartments and cold storage warehouses. . These guide rails 4 and 4 are formed in a substantially U-shaped cross section in which guide grooves (not shown) are provided on one side surface in the longitudinal direction along the longitudinal direction. It is attached and fixed to both side wall portions in a substantially vertical shape along the direction.

The screen device 1 also includes a winding device body 7 which is a winding means. This winding device body 7
Is a shielded portion 2 which is one surface side of a wall-shaped support wall portion (not shown) that is provided so as to partition the upper portion of the corridor downward from the ceiling of the corridor that constitutes the opening 3 of the shielded portion 2. The guide rails 4 and 4 are mounted on the opposite surface of the guide rails 4 and 4.

The winding device main body 7 has a long box-shaped main body case 10 in the direction opposite to the guide rails 4, 4. Further, on the lower surface of the main body case 10, an insertion opening (not shown) is formed in the shape of an elongated slit along the longitudinal direction so as to communicate with the guide grooves of the guide rails 4, 4. In the main body case 10, an elongated bar-shaped winding portion 12 is rotatably supported along the horizontal direction of the opening 3 in a substantially horizontal direction, that is, along the longitudinal direction of the main body case 10. There is. Further, a pulley 13 is integrally provided at one end of the winding portion 12 in the axial direction. Also, the main body case 10
A motor 14 as a drive means capable of reversing and reversing is provided therein. The drive pulley 16 provided on the output shaft 15 of the motor 14 is provided with an endless belt-shaped drive transmission member 17 that is wound around the pulley 13 of the winding portion 12 to transmit the drive of the motor 14. The winding part 12 rotates.
The drive transmission member 17 is not limited to the endless belt shape, and may have any structure for transmitting rotational drive by a chain, a gear, or the like.

Further, one end edge of a sheet-like shielding sheet 20 as a shield is attached to the winding portion 12, and the shielding sheet is
Reference numeral 20 is a winding portion 12 which is rotated by the drive of the motor 14, and is wound and rewound through the insertion opening of the main body case 10 with both sides in the vertical direction engaged with the guide grooves of the guide rails 4 and 4. That is, it is raised and lowered. In addition, the shielding sheet 20 is a sheet material having flame retardance or noncombustibility when used as a fire / smoke-proof application in a place that needs to be shielded as a fireproof compartment or when used as an evacuation exit shield. , A non-combustible material such as glass cloth or silica cloth. In addition, for applications other than fire and smoke prevention applications, such as for keeping airtightness at entrances and exits of cool boxes and factories, for dust prevention,
When used for sound insulation, or for shielding entrances and exits through which people and goods pass, synthetic resin sheets such as vinyl chloride, polyester, polyurethane or those treated with flame retardant or non-combustible, Alternatively,
It may be formed of a woven cloth, a non-woven cloth, a cloth, or the like which has neither flame retardancy nor nonflammability.

Further, the opening 3 is formed at the lower edge which is the edge opposite to the edge attached to the winding portion 12 of the shielding sheet 20.
A cylindrical mounting portion 21 having an axial direction in a width direction that is a substantially horizontal direction along the plane is provided. Then, in the mounting portion 21, there is provided an elongated plate-shaped first weight portion 22 which is a weight portion.

Further, the lower edge of the shielding sheet 20 below the mounting portion 21 is an elastic member 24 which is an extension member as a belt-shaped extension means along the longitudinal direction of the first weight portion 22. That is, the elastic member 24 is, for example, a part of the lower portion of the shielding sheet 20, and has a plurality of folds 2 along the longitudinal direction of the first weight portion 22.
5 and 25 are provided to provide elasticity, and the force of pulling against the elasticity along the vertical direction which is the width direction of the elastic member 24 acts to extend the bellows state into a substantially flat shape, so that the pulling force is increased. When it does not work, it is continuously formed integrally with the shielding sheet 20 so that it becomes bellows again due to the restoring force due to elasticity. Then, the elastic member 24 and the first weight portion
An expansion means 26 is constituted by 22 and. The elastic member 24
Is not limited to the one that uses a part of the shielding sheet 20, but a separate member such as a sheet softer than the shielding sheet 20 or one that has elasticity due to elasticity of rubber or silicon rubber of a flame-retardant member. Any configuration may be adopted in which the shielding sheet 20 is stretched when a force that is stretched in the vertical direction is applied.

Further, the lower edge of the elastic member 24 is provided with a draining portion 27 as an edge portion. This drainer 27
For example, a contact portion 28 that is bent into a substantially U-shape with a steel plate or the like and has its lower surface abutting on the floor surface forming the lower edge of the opening 3 and landing.
And a second weight portion 29 similar to the first weight portion 22 is bent and formed on one opening surface of the contact portion 28 in a direction substantially parallel to the opening direction, together with the lower edge of the elastic member 24 to the bolt 30 and the like. And a mounting portion 31 to be mounted.

The elastic member 24 is located between the water draining portion 27 and the first weight portion 22, and the shielding sheet 20 has the first weight portion 22,
Due to the weight of the draining portion 27 including the elastic member 24 and the second weight portion 29, the winding device body 7 is lifted and lowered while being pulled in a substantially flat shape without being curled,
That is, it is slidable along the plane of the opening 3.

The contracting force of contraction, which is the restoring force due to the elasticity of the elastic member 24, is set to be weaker than the downward force due to the weight of the drainer 27. That is, as described above, when the weight of the draining portion 27 acts on the elastic member 24, it extends in a substantially sheet shape, and when the weight of the draining portion 27 does not act much, it contracts in a bellows shape by the restoring force due to elasticity. It has become.

Next, the operation of the above embodiment will be described.

In order to shield the shielded portion 2, the motor 14 of the winding device body 7 is operated by operation of various operation switches (not shown) or operation of a sensor for detecting flame or smoke.
Drives in the rewinding direction. By the drive of the motor 14, the rotational drive is transmitted to the pulley through the drive pulley 16 and the drive transmission member 17 provided on the output shaft 15 of the motor 14, and the winding portion 12
Rotates in the rewinding direction. By rotating the winding part 12 in the rewinding direction, the shielding sheet 20 wound around the winding part 12 is rewound. The shield sheet 20 has a lower end edge pulled downward by the weight of the weight portion 22 in a flat state, and has guide rails 4 on both sides through insertion openings 11 that are opened in the body case 10 of the winding device body 7. The guide groove 4 engages with the guide groove 4 and descends while being guided to gradually close the opening 3 of the shielded portion 2.

When the shielding sheet 20 is lowered,
As shown in FIG. 2, the shielding sheet 20 is stretched by the weight of the first weight portion 22, and the contracting force of the elastic member 24 is set to be weaker than the downward force caused by the weight of the draining portion 27. Therefore, it is in a state of being fully extended by the weight of the second weight portion 29 of the draining portion 27.

The water draining portion 27 located at the bottom of the shielding sheet 20 is in contact with the floor surface of the corridor or the like forming the opening 3 of the shielded portion and is landed on the motor of the winding device body 7. The driving of 14 is stopped, the rewinding of the shielding sheet 20 is stopped, and the opening 3 is closed.

Since there is a slight time lag from when the draining part 27 lands to when the motor 14 stops,
A state in which the shielding sheet 20 is slightly unwound is rewound. Then, the shielding sheet 20 is placed in the first position with the opening 3 closed.
Since the weight of the weight portion 22 is in a state of being stretched, an excessive amount of the unwound portion is accorded at the folds 25, 25 due to the elastic restoring force of the elastic member 24, as shown in FIGS. 1 and 3. It contracts into a folded state, absorbs the excess, and closes the opening 3 without the shielding sheet 20 loosening.

In this state, for example, a heat load is applied to the shielding sheet 20 so that the shielding sheet 20 contracts, or a pressure difference occurs on both sides of the shielding sheet 20 that closes the opening 3 of the shielded portion 2. As shown in FIG. 4, when a force for lifting the first weight portion 22 acts on the shielding sheet 20 such that the shielding sheet 20 is slackened in an arc shape due to wind pressure applied to one surface side of the shielding sheet 20, the elastic member 24. A force that pulls upward acts on. Due to this force, the elastic member 24 extends, and the draining portion 27 bends so that the shielding sheet 20 bends while the floor is kept on the floor, that is, the opening 3 is kept closed even when the shielding sheet 20 bends. .

When the force acting on the shielding sheet 20 is released, the elastic force of the elastic member 24 causes the restoring force of the elastic member 24 to contract like a bellows, and the shielding sheet 20 is stretched to close the opening 3. Becomes

When releasing the shielding of the shielded portion 2,
By operating various operation switches (not shown), the motor 14 of the winding device body 7 is driven in the winding direction, the winding portion 12 is rotated in the winding direction, and the shielding sheet 20 is wound. At the time of this winding, a force pulling upward is applied to the elastic member 24, so that the elastic member 24 first extends in a substantially planar shape, and when the elastic member 24 is completely extended, the drainer 27 is lifted as shown in FIG. It is taken up and wound up.

As described above, the shielding sheet 20 has a draining portion.
Since the elastic member 24 that expands by the downward force due to the weight of 27 is provided, the draining portion 27 such that the shielding sheet 20 is subjected to a bending force or a contraction force due to a heat load is applied. Even when a force is applied in the direction of lifting, the stretchable member 24 expands, the landing state is obtained without lifting the drainer 27, the closed state of the opening 3 can be secured, and the dustproofness, smokeproofness, and sound insulation It is possible to secure heat resistance and cold insulation.

Further, since the elastic member 24 contracts with a force weaker than the downward force due to the weight of the draining portion 27, the shielding sheet 24
By eliminating the force acting on 20, the opening 3 can be closed while the shielding sheet 20 is stretched without sagging, the deterioration of the appearance due to the sagging can be prevented, and a gap due to the large sagging can be prevented.

Since the elastic member 24 is provided at the lower end portion of the shielding sheet 20, that is, between the draining portion 27 and the first weight portion 22, the bellows-shaped elastic member 24 is positioned at the lower edge of the opening 3. Therefore, it is difficult to enter the field of view, and it is possible to prevent the appearance of the shielded portion 2 in the shielded state from being impaired, and even if the force acts on any position of the shield sheet 20 that closes the opening 3, the drainer 27 is It can be prevented from being lifted up, and the shielding state can be reliably ensured.

Further, since the elastic member 24 is formed in an expandable and contractible sheet shape, even if a force acts on the shielding sheet 20 with a simple structure, the closed state of the opening 3 can be maintained and the manufacturability can be improved.

Further, since the elastic member 24 is formed by providing the folds 25, 25 in a part of the shielding sheet 20 to give elasticity,
Even if a force acts on the shielding sheet 20, a configuration in which the closed state of the opening 3 can be maintained can be obtained, and the manufacturability can be improved.

Further, since a pair of guide rails 4 having guide grooves which slidably guide and engage both sides of the shielding sheet 20 in the vertical direction, are provided, the shielding sheet 20 has the opening 3 Stable sliding movement when opening and closing,
Even if a force such as bending acts on the shielding sheet 20, since both side edges are engaged with the guide groove, some or all of the force is absorbed by friction between the guide groove and the edge of the shielding sheet 20, Along with the expansion and contraction of the elastic member 24, the shielding property against force can be improved.

Further, since the first weight portion 22 is provided, even if a force acts on the shielding sheet 20, a part or all of the force acting on the weight of the first weight portion 22 is absorbed, and the elastic member. In addition to the expansion and contraction of 24, it can improve the shielding property against force,
Since tension is applied to the shielding sheet 20 by the first weight portion 22, the elastic member 24 is folded at the lower edge portion of the shielding sheet 20.
It is possible to integrally form only by providing 25, 25, and it is not necessary to separately sew or bond a soft sheet-shaped member, and the manufacturability can be improved.

Since both ends of the first weight portion 22 are movably engaged with the guide grooves of the guide rails 4 and 4, even if a force acts on the shielding sheet 20, both edges of the shielding sheet 20 are guided. It becomes difficult to come off from the guide grooves of 4 and 4, and the shielding sheet 20
In addition to the smooth opening and closing operation, it is possible to prevent a gap from being generated by being removed from the guide groove, and to reliably close the opening 3.

In the above embodiment, the expansion means
As the 26, the description has been made by configuring the shielding sheet 20 with a stretchable member 24 formed in a bellows shape and the first weight portion 22, but if the stretchable member 24 has contractibility, for example, Even if the first weight portion 22 is not provided, the opening 3 can be closed in a state where the shielding sheet 20 is stretched without sagging. Further, since the first weight portion 22 is unnecessary, the configuration can be simplified and the manufacturability can be improved. Furthermore, the entire shielding sheet 20 may be formed in a bellows shape or a rubber or the like so that it can be expanded and contracted. According to this structure, the shielding sheet 20 serves as an expansion means, and expands so as to be flexed as a whole when a force is applied, and when the force is no longer applied, the opening 3 can be closed in a stretched and contracted state. .

Further, although the elastic member 24 has been described as having a contracting property, it may be formed of, for example, a member which is more flexible than the shielding sheet 20, or may be simply a part of the shielding sheet 20, and the opening 3 may be replaced by the shielding sheet 20. The first weight portion 22 for closing in a stretched state
Can be provided. With this configuration, even if there is no contraction, the weight of the first weight portion 22 causes the shielding sheet 20 to be stretched again when the force acting on the shielding sheet 20 disappears.

Further, the elastic member 24 is provided between the first weight portion 22 and the draining portion 27 at the lower edge portion of the shielding sheet 20. The elastic member 24 is provided on both sides in the horizontal direction of the shielding sheet 20. Instead, it may be provided only in the center of the shielding sheet 20, or a plurality of shielding sheets may be provided in the vertical direction.

Although the shielding sheet 20 is formed in the shape of one sheet in the above description, for example, a plurality of flexible sheet-shaped sheet members are formed so that side edges thereof overlap with each other in the vertical direction as the winding direction. It may be configured to be provided with a strip or configured such that adjacent sheet members overlap each other in the thickness direction to sandwich the adjacent sheet members, and the like, and the sheet may be wound and rewound integrally with the winding portion 12. According to this configuration, when the screen device 1 is used as a smoke prevention device, for example, an opening is provided between the overlapping sheet members to provide an evacuation port through which a person can pass. When the shielding sheet 20 is composed of a plurality of sheet members, for example, the first weight portions 22 are arranged in a zigzag pattern in the vertical direction with respect to the plane of the opening 3, or they are mutually It is preferable to provide the first weight portion 22 and the water draining portion 27 so as not to project to the overlapping surface. With this configuration, it is possible to prevent a gap from being generated between the sheet members, and to reliably shield the shielded portion 2.

Further, although the structure in which the shielding sheet 20 is slidably taken up and down in the vertical direction has been described, it can be slidably moved in the right and left directions such as a curtain, or can be horizontally moved along the floor surface. It is also possible to adopt a configuration in which it is slidably moved, or a configuration in which it is simply suspended and supported without being moved.

Further, the opening / closing device is not limited to the screen device described above, but may be a shutter device, a blind device, a door device, or the like, and the shield is not limited to the sheet-like one. For example, a structure in which a plurality of slats or panels are connected, a structure in which only a plate-shaped object is slidably moved, or a combination of these structures, that is, a structure in which a sheet member and slats or panels are connected in the vertical direction You can also do so.

[0043]

According to the present invention, and contract takes heat load shielding sheet if example embodiment, occur deformation such as curving takes wind pressure shielding sheet, the force draining portion is lifted acts Even without any gaps
The shielding state of the shielding unit can be maintained.

[Brief description of drawings]

FIG. 1 is a partial perspective view near a stretchable member of a screen device showing an embodiment of an opening / closing device of the present invention.

FIG. 2 is a cross-sectional view showing a state in which the draining portion of the same shielding sheet is separated from the floor surface.

FIG. 3 is a cross-sectional view showing a state in which the above opening is closed.

FIG. 4 is a sectional view showing a state in which wind pressure is applied to the shielding sheet.

FIG. 5 is a front view showing the above screen device.

[Explanation of symbols]

1 screen unit 2 the hidden part 3 opening 20 shielding蔽sheet 24 Shin contraction member 26 expansion means 27 water cut of the switchgear

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-62-148787 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) E06B 9/13 E06B 9/17

Claims (5)

(57) [Claims] 1. An opening opening to a shielded portion can be closed.
Flexible and sheet-shaped shielding sheet having, provided on the lower edge of the shielding sheet, and a water drainage portion which abuts against the lower edge of the opening, is provided between the shielding sheet and the draining portion, wherein
A draining portion that is capable of expanding and contracting in a vertical direction when a downward force is applied to the draining portion , and the draining portion abuts a lower edge of the opening portion to shield the shielding sheet.
When the opening is closed with a
A force is applied to the shielding sheet in the direction of lifting the drainer.
If the expansion member is contracted,
An opening / closing device characterized in that the contact state of the draining part with the lower edge of the opening is maintained . 2. An opening opening to the shielded portion can be closed.
A flexible sheet-like shielding sheet and a lower edge of the shielding sheet, which is provided at the lower edge of the shielding sheet.
A draining portion that abuts, a weight portion provided on the shielding sheet, and the draining portion that is located between the draining portion and the weight portion.
Downward force due to the weight of the
And a stretchable elastic member that extends in the direction of the weight , and the drainer is in contact with the lower edge of the opening so that
With the shielding sheet that is stretched by the weight,
When the mouth is closed,
If a force is applied to lift the water
When the weight part is lifted,
The contraction member extends and the lower edge of the opening of the draining section
An opening / closing device characterized in that the contact state is maintained . 3. An opening that opens to the shielded portion can be closed.
A flexible sheet-like shielding sheet and a lower edge of the shielding sheet, which is provided at the lower edge of the shielding sheet.
The draining portion that abuts and a part of the lower portion of the shielding sheet,
Upward and downward due to downward force due to the weight of the part
And an elastic sheet-shaped elastic member that extends in the same direction
However , the drainage portion abuts on the lower edge of the opening portion, and
When the opening is closed with a
A force is applied to the shielding sheet in the direction of lifting the drainer.
If the expansion member is contracted,
The contact state of the draining part with the lower edge of the opening is maintained.
Switchgear characterized by that. 4. An opening opening to the shielded portion can be closed.
A flexible sheet-like shielding sheet and a lower edge of the shielding sheet, which is provided at the lower edge of the shielding sheet.
The draining portion that comes into contact with the weight, the weight portion provided on the shielding sheet, and a part of the lower portion of the shielding sheet,
Located between the weight section and the weight section, depending on the weight of the draining section.
It extends vertically due to the downward force.
An elastic member capable of expanding and contracting, wherein the water draining portion abuts a lower edge of the opening portion,
With the shielding sheet that is stretched by the weight,
When the mouth is closed,
If a force is applied to lift the water
The weight is lifted, and the weight causes the bellows to move.
The elastic member, which had been contracted in the shape of
Patent that the contact between the lower edge of the opening of is maintained
Switchgear to collect. 5. An opening that opens to the shielded portion can be closed.
A substantially flat shielding sheet , provided on the lower edge of this shielding sheet, at the lower edge of the opening.
The draining portion that abuts and at least a part of the shielding sheet are provided.
Due to the downward force exerted by the weight of the grip,
A plurality of flexible sheet-shaped shielding sheets.
It is composed of a sheet member, and this sheet member is vertically
The opposite side edges are provided so that they overlap each other.
An evacuation port that allows passage through the openings between the adjacent sheet members
A switchgear that is formed .