JP5137733B2 - Shutter device for drawer type switch - Google Patents

Description

  INDUSTRIAL APPLICABILITY The present invention is used for a pull-out type switch that disconnects an electric circuit by inserting or pulling out the switch with respect to a fixed terminal fixed in a switch chamber in which the switch that opens and closes the electric circuit is accommodated The present invention relates to a shutter device for a drawer type switch.

  In general, a switchgear is known as a machine having a drawer type switch that opens and closes an electric circuit. The switch gear is provided with a switch terminal chamber in which a fixed terminal is fixed and a switch (breaker) having a disconnection terminal and configured to be movable is accommodated. The switch gear is pushed in by bringing the switch closer to the fixed terminal and connecting the disconnect terminal to the fixed terminal. Further, the switch gear is pulled out by pulling out the switch from the switch chamber and disconnecting the disconnection terminal from the fixed terminal. That is, a drawer type switch is constituted by the fixed terminal and the switch, and the switchgear connects and disconnects the disconnecting portion with the drawer type switch. The maintenance / inspection work in the switchgear switchgear room is that the operator enters the switchgear room and performs maintenance / inspection work after the switchgear is pulled out of the switchgear room.

  By the way, when the switch is pulled out from the switch room, the fixed terminal is exposed in the switch room, and if maintenance or inspection work is performed in this state, an accident such as an operator touching the fixed terminal and getting an electric shock. May occur.

  In order to prevent such an electric shock accident, the shutter provided corresponding to the fixed terminal is lifted and lowered to shield or expose the fixed terminal as the arm member rotating in the vertical direction of the switch room moves. There has been proposed a shutter mechanism for a switch (see, for example, Patent Document 1). In the shutter mechanism of the switch described in Patent Document 1, when the switch is pulled out from the switch chamber, the shutter is lowered and the fixed terminal is shielded, so that the worker contacts the fixed terminal during maintenance / inspection work. It is possible to prevent the occurrence of an electric shock accident.

JP 2002-335610 A

  However, the shutter mechanism of the switch described in Patent Document 1 unintentionally moves the operator's body when the switch is pulled out of the switch chamber and the worker enters the switch chamber to perform maintenance / inspection work. Or the like may come into contact with each other and the arm member may be lifted to open the shutter, and the fixed terminal may be exposed. That is, in the shutter mechanism of the switch described in Patent Document 1, when a worker performs maintenance / inspection work in the switch chamber, the fixed terminal may be unexpectedly exposed and an electric shock may occur.

  The above-described problem is not limited to the switchgear, but similarly exists in a machine having a drawer type switch composed of a fixed terminal and a switch.

  In view of such circumstances, the present invention can expose and shield the fixed terminal in conjunction with the insertion and removal of the switch in the switch room, and can prevent an electric shock accident during maintenance and inspection work in the switch room. An object of the present invention is to provide a shutter device for a drawer type switch that can reliably prevent generation.

  A first aspect of the present invention that solves the above-described problem includes a fixed terminal fixed in a switch chamber, and a switch configured to be movable including a disconnection terminal connected to the fixed terminal, A pull-out type switch that is brought into a pushed-in state by bringing the switch closer to the fixed terminal and connecting the disconnection terminal to the fixed terminal, and being pulled out by separating the disconnection terminal and the fixed terminal An arm member configured to be slidable in an approaching / separating direction with respect to the fixed terminal of the switch and rotatable in the vertical direction of the switch chamber about one end side; A shutter plate connected to the other end side of the arm member and arranged corresponding to the fixed terminal and supported so as to be slidable in the vertical direction of the switch chamber, and a fitting portion provided in the arm member Combined A guide member that guides movement of the shutter member, and when the switch approaches the fixed terminal, the switch contacts the arm member and the arm member rotates to slide the shutter plate. The arm member is configured such that the fixed terminal is exposed, and the guide member extends along an approaching direction of the switch, and the fixed terminal is shielded by the shutter plate. There is provided a shutter device for a drawer type switch having a rotation restricting portion for guiding only the sliding movement.

  In the first aspect, the arm member is guided only in sliding movement by the fitting portion of the arm member and the rotation restricting portion of the guide member, and the arm member is guided only in sliding movement. Be regulated. Therefore, by positioning the fitting portion in the rotation restricting portion, it is possible to restrict the rotation of the arm member and prevent the shutter plate from rising.

  According to a second aspect of the present invention, in the drawer-type switch shutter device according to the first aspect, the arm member further includes a biasing unit that biases the arm member in a direction in which the switch is separated from the fixed terminal. This is a shutter device for a drawer type switch.

  In the second aspect, when the switch is pulled out from the switch chamber by the biasing means, the arm slides in a direction away from the fixed terminal, and the fitting portion reaches the rotation restricting portion easily and reliably. . Therefore, according to this aspect, the rotation of the arm member and the lifting of the shutter plate can be reliably regulated.

  According to the drawer-type switch shutter device of the present invention, the arm member is slidably moved by positioning the fitting portion on the rotation restricting portion by the fitting portion of the arm member and the rotation restricting portion of the guide member. Only the guide is guided and the rotation is restricted. Therefore, by positioning the fitting portion in the rotation restricting portion, it is possible to restrict the rotation of the arm member and prevent the shutter plate from rising. As a result, when the switch is pulled out from the switch chamber, the arm member is moved so that the fitting portion is positioned at the rotation restricting portion, so that the fixed terminal is not intended by the worker during maintenance / inspection work. Can be reliably prevented from being exposed, and an electric shock accident can be reliably prevented.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Hereinafter, a switchgear will be described as an example of a machine having a drawer type switch.

(Embodiment 1)
First, before explaining the shutter device 29 for a drawer type switch according to the present invention, a switch gear to which the shutter device 29 for a drawer type switch is applied will be explained.

  FIG. 1 is a side view showing the overall configuration of the switchgear.

  Housed in the housing 2 of the switchgear 1 are a power cable 3 for supplying power drawn from a substation, a fixed terminal 4, an instrument transformer 5, a switch (breaker) 6, a disconnector 7, etc. ing. The casing 2 is partitioned by a partition wall 8 into a cable chamber 9 that houses the power cable 3, a switch chamber 10 that houses the switch 6, a disconnector chamber 11 that houses the disconnector 7, and the like. A door body (not shown) is formed in a portion of the housing 2 where 6 is inserted and removed.

  The cable room 9 accommodates the power cable 3 and the instrument transformer 5. The power cable 3 accommodated in the cable chamber 9 is connected to the lower fixed terminal 16 via the connection conductor 14 and the cable 15 by the terminal connection portion 12. In addition, although not shown in figure, the electric power cable 3 is arrange | positioned for three phases in the direction orthogonal to a paper surface.

  The cable chamber 9 accommodates a part of the fixed terminal 4. The fixed terminal 4 includes a lower fixed terminal 16 and an upper fixed terminal 17, and each front part is provided so as to face the switch chamber 10 through openings 18 and 19 formed in the partition wall 8. Although not shown, in the present embodiment, the fixed terminals 4 for three phases are provided in a direction orthogonal to the paper surface. The upper fixed terminal 17 is connected to the disconnector 7 in the disconnector chamber 11 via the bus 20.

  A switch 6 is accommodated in the switch chamber 10. The switch 6 includes a cart unit 22 having wheels 21 provided on the lower side of the side surface, and a switch body 23 mounted on the cart unit 22. Rails (not shown) are provided at the lower part of the switch room 10. The switch 6 can be easily inserted into and removed from the switch room 10 by fitting the wheels 21 of the carriage unit 22 to the rails. It is possible. Further, the switch 6 has disconnection terminals 24 and 25 projecting in a substantially horizontal direction toward the fixed terminal 4, and the switch 6 is inserted into the switch chamber 10 close to the fixed terminal 4. As a result, the disconnection terminals 24 and 25 are connected to the fixed terminal 4, and the disconnection of the switch gear 1 is pushed. Further, by pulling the switch 6 away from the fixed terminal 4 and pulling it out of the switch chamber 10, the connection with the disconnecting terminal 24, 25 is disconnected and the disconnecting part of the switchgear 1 is pulled out. That is, the switchgear 1 has a drawer type switch composed of the fixed terminal 4 and the switch 6 in the switch chamber 10. The cart unit 22 of the switch 6 is provided with pressing rollers 26 that engage with a notch 36 described later on both side surfaces of the cart unit 22. In addition, although the shutter apparatus 29 mentioned later is accommodated in the switch room 10, it is abbreviate | omitting in FIG.

  A disconnector 7 is accommodated in the disconnector chamber 11. The disconnector 7 is configured to be openable and closable by a drive mechanism, and is connected to the output terminal 28 via the bus 27.

  In such a switchgear 1, an internal circuit is configured by the fixed terminal 4, the switch 6, the disconnector 7, the output terminal 28, and the like, and the power cable 3 is connected to the internal circuit. The electric circuit connected to the output terminal 28 through the switch 6, the upper fixed terminal 17, and the disconnect switch 7 is formed.

  In the switchgear chamber 10 of the switchgear 1 configured as described above, a drawer-type switch shutter device 29 that shields or exposes the fixed terminal 4 is provided. FIG. 2 is a side view showing a schematic configuration of a shutter device for a drawer type switch. FIG. 3A is an enlarged view of the base end piece of the arm member in the drawer type switch shutter device, and FIG. 3B is a cross-sectional view taken along line A-A ′ of FIG. FIG. 4A is an enlarged view of a main part of a fitting portion of an arm member in the drawer type switch shutter device, and FIG. 4B is a cross-sectional view taken along the line B-B ′ of FIG. FIG. 5 shows a drawer type switch shutter device in a state in which the switch is pulled out from the switch chamber, wherein (a) is a side view thereof and (b) is a front view thereof. FIG. 6 shows a drawer-type switch shutter device in a state in which the switch is housed in the switch chamber, wherein (a) is a side view thereof and (b) is a front view thereof. In the drawer-type switch shutter device 29 described below, two members other than the shutter plate 31 are provided symmetrically on the left and right sides of the switch chamber 10.

  As shown in FIG. 2, the drawer-type switch shutter device 29 according to the first embodiment of the present invention includes an arm member 30, a shutter plate 31, and a guide member 32 that guides the movement of the arm member 30.

  The arm member 30 is provided in a state where the base end piece is positioned on the front side of the switch chamber 10 and the tip piece is positioned on the back side of the switch chamber 10.

  As shown in FIGS. 3A and 3B, the base end piece of the arm member 30 is provided with a long hole 33 along the length direction of the base end piece. The arm member 30 is supported by a first support member 34 and a second support member 35 fixed to the inner wall surface of the housing 2. The first support member 34 is a substantially columnar member, and a large-diameter portion 34a is provided at the center in the height direction. The small diameter portion 34 b on one side is fixed to the inner wall surface of the housing 2. The other side small diameter portion 34 c is fitted into the long hole 33 of the base end piece of the arm member 30. The second support member 35 having a substantially elliptical shape is fixed to the small diameter portion 34c of the first support member 34, and the arm member 30 is connected to the large diameter portion 34a of the first support member 34 and the second support member 34. It is sandwiched between the members 35. As a result, the arm member 30 is slidable in the approaching / separating direction with respect to the fixed terminal 4 of the switch 6 by the length of the long hole 33 and is supported by the small diameter portion 34c of the first support member 34 on one end side. Is configured to be rotatable in the vertical direction.

  Returning to FIG. 2, the intermediate piece of the arm member 30 is provided with a cutout portion 36 formed by cutting out a part thereof. The notch 36 is provided at the same height as the pressing roller 26 of the carriage unit 22 in a state where the switch 6 is pulled out from the switch chamber 10 (see FIG. 5A).

  In addition, the distal end piece of the arm member 30 is provided with a long hole 37 along the length direction of the distal end piece. A fitting roller 38 serving as a fitting portion to be fitted to the guide member 32 is provided on the tip piece of the arm member 30.

  The shutter plate 31 is arranged corresponding to the fixed terminal 4 and supported so as to be slidable in the vertical direction of the switch chamber 10. Specifically, the vertical sliding movement of the shutter plate 31 is realized by the lifting rod 39 and the holding member 40.

  The elevating rod 39 is a bar-like member provided in the up-down direction of the switch chamber 10 and is provided with its lower end bent. The elevating rod 39 is connected to the arm member 30 such that the bent portion at the lower end is loosely inserted into the elongated hole 37 of the tip piece of the arm member 30. Thereby, the raising / lowering rod 39 moves with the vertical rotation of the arm member 30. The shutter plate 31 is provided in the middle and upper end of the lifting rod 39 at a position corresponding to the fixed terminal 4 and facing the fixed terminal 4 when the switch 6 is pulled out from the switch chamber 10.

  The holding member 40 is a member that functions to hold the position of the shutter plate 31, and is supported by the partition wall 8 near the openings 18 and 19 so as to be rotatable in the vertical direction of the switch chamber 10. A shutter plate 31 is attached to the rotating end of the holding member 40. Thereby, the shutter plate 31 is held so as to move up and down in front of the fixed terminal 4.

  The shutter plate 31 moves up and down with the rotation of the arm member 30 by the lifting rod 39 and the holding member 40 thus connected. The fixed terminal 4 is exposed when the shutter plate 31 is raised and shielded when the shutter plate 31 is lowered.

  The guide member 32 is a member that is fitted with a fitting roller 38 that is a fitting portion provided in the arm member 30, and guides the movement of the arm member 30, and is shown in FIGS. 4 (a) and 4 (b). As shown, it is fixed to the inner wall surface of the housing 2. Note that the guide member 32 of the present embodiment is formed of a substantially U-shaped cross section, and is fixed to the inner wall surface of the housing 2 with the opening facing the inside of the housing 2. .

  The guide member 32 extends along the approaching direction of the switch 6 with respect to the fixed terminal 4, and the rotation restricting portion 41 guides only the sliding movement of the arm member 30 in a state where the fixed terminal 4 is shielded by the shutter plate 31. Have The guide member 32 is fixed so that the rotation restricting portion 41 is at the same height as the fitting roller 38 of the arm member 30 in a state where the shutter plate 31 shields the fixed terminal 4. When the fitting roller 38 of the arm member 30 is positioned at the rotation restricting portion 41, the arm member 30 can slide while the fixed terminal 4 is shielded by the shutter plate 31. Since the roller 38 contacts the wall surface of the ceiling portion of the rotation restricting portion 41, the rotation is restricted. Here, the rotation means that the rotation end of the arm member 30 rises upward in the switch chamber 10. That is, in the case of the drawer-type switch shutter device 29 of the present embodiment, the arm member 30 is provided with a slight inclination with respect to the direction in which the long hole 33 of the base end piece is directed toward the back of the switch chamber 10. Therefore, when the fitting roller 38 is positioned in the rotation restricting portion 41, when the arm member 30 is moved in the direction toward the back of the switch chamber 10, the arm member 30 slides and the length of the tip piece is increased. The hole 33 is slightly rotated so as to be parallel to the moving direction. However, the rotation of the arm member 30 that occurs when moving in the depth direction of the switch chamber 10 does not raise the rotation end in the upward direction of the switch chamber 10, but is restricted by the rotation restricting portion 41 described above. It does not correspond to the rotation that is performed.

  In addition, the guide member 32 of the present embodiment includes a rotation allowing portion 42 that extends upward from the end of the rotation regulating portion 41 on the back side of the switch chamber 10. In addition, as for the rotation permission part 42, the boundary part with the rotation control part 41 is not a right angle, but is carrying out R shape gently. When the fitting roller 38 is located in the rotation allowing portion 42, the arm member 30 can turn because the fitting roller 38 does not contact the wall surface of the turning allowance portion 42. Further, when the arm member 30 rotates and the fitting roller 38 moves from the rotation permission portion 42 toward the rotation restriction portion 41, the rotation permission portion 42 is provided continuously to the rotation restriction portion 41. Therefore, the fitting roller 38 smoothly reaches the rotation restricting portion 41.

  The drawer-type switch shutter device 29 configured as described above is disposed in the switch chamber 10 and behaves as shown in FIGS.

  As shown in FIGS. 5A and 5B, when the switch 6 is brought close to the fixed terminal 4 from the state in which the switch 6 is pulled out from the switch chamber 10, the pressing roller 26 of the switch 6 is moved. The arm member 30 is brought into contact with the cutout portion 36 of the intermediate piece of the arm member 30 of the drawer-type switch shutter device 29 and the fitting roller 38 moves along the rotation restricting portion 41 of the guide member 32. Also slides in the direction of travel of the switch 6. When the switch 6 is further moved closer to the fixed terminal 4, the fitting roller 38 reaches the rotation allowing portion 42 from the rotation restricting portion 41 of the guide member 32, and the pressing roller 26 is below the tip piece of the arm member 30. The arm member 30 rotates upward in the switch chamber 10. Then, as shown in FIGS. 6A and 6B, as the lifting rod 39 is raised by the rotation of the arm member 30, the shutter plate 31 is raised and the fixed terminal 4 is exposed. In addition, when the switch 6 is further moved closer to the fixed terminal 4, the disconnecting terminal 24, 25 of the switch 6 is inserted into the exposed fixed terminal 4. When the switch 6 is pulled out of the switch chamber 10 from the state of FIGS. 6A and 6B, the arm member 30 is rotated downward by the weight of the switch chamber 10 and the shutter plate 31 is lowered. Then, the fixed terminal 4 is shielded. In FIG. 5B and FIG. 6B, the fitting roller 38 and the guide member 32 are omitted.

  In the drawer-type switch shutter device 29 of the present embodiment configured and behaving as described above, the arm member 30 is attached to the fixed terminal 4 of the switch 6 by housing the switch 6 in the switch chamber 10. After the sliding movement for a predetermined distance in the approaching direction, the switch room 10 is rotated upward. As the arm member 30 pivots upward in the switch chamber 10, the shutter plate 31 rises and the fixed terminal 4 is exposed. Further, when the switch 6 is pulled out from the switch chamber 10, the arm member 30 rotates downward in the switch chamber 10 by its own weight. As the arm member 30 is rotated downward, the shutter plate 31 is lowered and the fixed terminal 4 is shielded. That is, according to the drawer-type switch shutter device 29 of the present embodiment, the fixed terminal 4 can be exposed and shielded in conjunction with the insertion and removal of the switch 6 in the switch chamber 10.

  Further, in the drawer-type switch shutter device 29 of the present embodiment, since the fitting roller 38 of the arm member 30 is fitted to the guide member 32, the arm member 30 moves along the guide member 32. When the fitting roller 38 provided on the rotation end side of the arm member 30 is located in the rotation restricting portion 41, the arm member 30 can be slid, but the fitting roller 38 is restricted from turning. Since it contacts the ceiling of the part 41, the rotation of the arm member 30 is restricted. Therefore, according to the drawer-type switch shutter device 29 of the present embodiment, an electric shock accident occurs when the switch 6 is pulled out of the switch chamber 10 to perform maintenance / inspection work in the switch chamber 10. This can be surely prevented.

(Embodiment 2)
FIG. 7A is an enlarged view of the base end piece of the arm member in the shutter device for the drawer type switch according to the second embodiment of the present invention, and FIG. 7B is a cross-sectional view along CC ′ in FIG. It is. FIG. 8 is an enlarged view of the base end piece of the arm member in the drawer type switch shutter device according to the second embodiment of the present invention. FIG. 9 is a schematic view showing the trajectory of the arm member of the shutter device for the drawer type switch according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member same as Embodiment 1, and the overlapping description is abbreviate | omitted. FIG. 7A shows the base end piece of the arm member in a state where the fitting roller is located at the rotation restricting portion, and FIG. 8 shows that the fitting roller is located at the turning permission portion. The base end piece of the arm member in the state which has been shown is shown.

  As shown in FIGS. 7A and 7B, in the drawer type switchgear shutter device 29A of the present embodiment, the arm member 30A is fixed to the base end piece of the arm member 30A, and the switch 6 is a fixed terminal. A spring 43 that is an urging means for urging in a direction away from 4 is attached. Specifically, the spring 43 is provided along the length direction of the base end piece, and one end portion of the spring 43 is fixed to the first pin portion 44 provided on the intermediate piece side of the arm member 30A. ing. On the other hand, the other end portion of the spring 43 is fixed to a second pin portion 45 provided on the second support member 35A. Since the spring 43 fixed in this way is provided, as shown in FIG. 8, when the arm member 30A rotates, the spring 43 extends so that the switch 6 is separated from the fixed terminal 4 with respect to the arm member 30A. Force to go in the direction to do.

  In the drawer-type switch shutter device 29A of the present embodiment configured as described above, when the switch 6 is pulled out from the state accommodated in the switch chamber 10 by the spring 43 as the biasing means, as shown in FIG. Furthermore, after the arm member 30A is rotated by its own weight until the fitting roller 38 rotates to reach the boundary portion between the rotation allowing portion 42 and the rotation restricting portion 41, the fitting roller automatically receives the contraction force of the spring 43. The switch 6 slides in the direction separating from the fixed terminal 4 (left direction in FIG. 9) along the rotation restricting portion 41 until 38 reaches the region of the rotation restricting portion 41. Therefore, according to the drawer-type switch shutter device 29A of the present embodiment, the arm member can be rotated during maintenance / inspection work in the switch chamber 10 by pulling out the switch 6 from the switch chamber 10. It is possible to reliably regulate and prevent electric shock accidents.

  In addition, as shown in FIGS. 7A and 7B, the drawer-type switch shutter device 29A of the present embodiment has a base end piece and a second end piece of the arm member 30A in a state before the rotation. A through hole 46 having a predetermined diameter is provided across the support member 35A. By fixing the arm member 30A to the through hole 46 through a key such as a padlock, the arm member 30A does not rotate, and of course, it cannot slide along the rotation restricting portion 41 of the guide member 32. Therefore, an electric shock accident during maintenance / inspection work in the switch room 10 can be reliably prevented.

  In addition, although the urging means of the present embodiment is a tension spring, the urging means may be constituted by a compression spring. Further, the biasing means is not limited to a spring, and may be an elastic rubber.

(Other embodiments)
As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above.

  For example, in the above-described embodiment, the guide member 32 is configured by a member having a substantially U-shaped cross section, but the fitting roller 38 contacts to rotate the arm members 30 and 30A. If it restrict | limits, the shape of the guide member 32 will not be specifically limited to this, For example, you may be comprised by the plate-shaped member.

  In the above-described embodiment, the rotation allowing portion 42 is provided. However, when the arm members 30 and 30 </ b> A are rotated, the fitting roller 38 is surely guided into the rotation restricting portion 41. As long as it is comprised, the rotation permission part 42 does not need to be provided.

  In the above-described embodiment, the example applied to the switchgear has been described. However, the present invention is not limited to the switchgear, and includes a drawer type switch composed of a switch having a disconnection terminal and a fixed terminal. Any machine can be preferably applied.

It is a side view of a switchgear. It is a side view of the shutter device for drawer type switches according to Embodiment 1 of the present invention. It is an enlarged view of the base end piece of the arm member in the shutter device for drawer type switches according to Embodiment 1 of the present invention. It is a principal part enlarged view of the fitting part of the arm member in the shutter device for drawer | drawing-out type switches concerning Embodiment 1 of this invention. It is the side view and front view of the shutter device for drawer type switches which concern on Embodiment 1 of this invention. It is the side view and front view of the shutter device for drawer type switches which concern on Embodiment 1 of this invention. It is an enlarged view of the base end piece of the arm member in the shutter device for drawer type switches according to Embodiment 2 of the present invention. It is an enlarged view of the fitting part of the arm member in the shutter device for drawer | drawing-out type switches concerning Embodiment 2 of this invention. It is the schematic which shows the track | orbit of the arm member of the shutter apparatus for drawer | drawing-out type switches concerning Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Switchgear 2 Case 3 Power cable 4 Fixed terminal 5 Instrument transformer 6 Switch 7 Disconnector 8 Bulkhead 9 Cable room 10 Switch room 11 Disconnector room 12 Terminal connection part 14 Connection conductor 15 Cable 16 Lower fixed terminal 17 Upper fixed terminal 18, 19 Open 20, 27 Busbar 21 Wheel 22 Dolly unit 23 Switch body 24, 25 Disconnect terminal 26 Press roller 28 Output terminal 29, 29A Drawer type shutter device 30, 30A Arm member 31 Shutter plate 32 Guide member 33, 37 Long hole 34 First support member 34a Large diameter part 34b, 34c Small diameter part 35, 35A Second support member 36 Notch part 38 Fitting roller 39 Lifting rod 40 Holding member 41 Rotation restricting part 42 Rotation permitting portion 43 Spring 44 First pin portion 45 Second pin portion 46 Through hole

Claims (2)

A fixed terminal fixed in the switch chamber; and a switch configured to be movable with a disconnection terminal connected to the fixed terminal, wherein the disconnection terminal is brought close to the fixed terminal. A shutter device used in a pull-out type switch that is in a pushed state by connecting to the fixed terminal, while being pulled out by disconnecting the disconnection terminal and the fixed terminal,
An arm member configured to be slidable in the approaching / separating direction with respect to the fixed terminal of the switch and rotatable in the vertical direction of the switch chamber around one end side, and connected to the other end side of the arm member And a shutter plate arranged corresponding to the fixed terminal and supported so as to be slidable in the vertical direction of the switch chamber, and a fitting portion provided in the arm member to guide the movement of the arm member. And when the switch approaches the fixed terminal, the switch contacts the arm member and the arm member rotates to slide the shutter plate and expose the fixed terminal. Configured to be
The guide member has a rotation restricting portion that extends along the approaching direction of the switch and guides only the sliding movement of the arm member in a state where the fixed terminal is shielded by the shutter plate. A shutter device for a drawer-type switch, which is characterized. The drawer-type switch shutter device according to claim 1,
A shutter device for a drawer type switch, further comprising biasing means for biasing the arm member in a direction in which the switch is separated from the fixed terminal.

Images