JPH0321127Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a control unit position display device that allows the operating status of a control unit in a closed switchboard, etc. to be visually confirmed from the outside with the door closed. .

[Conventional technology]

In closed switchboards, etc., the front door is closed while the control unit is housed in the panel case. With this door closed, the operating position of the internal control unit, i.e., disconnection position, connection position,
There is an administrative requirement to know the test position or when the control unit is not stowed.

As a conventional control unit position display device, there is one described, for example, in Japanese Patent Laid-Open No. 57-68611. This is equipped with a multiple micro switch operated by a rod that is linked to the movement of the control unit, and an electrical display device operated by this multiple micro switch. A rod is provided that moves in and out of the box body in conjunction with the switch, and the disconnection state can be detected by the rod protruding outside the box body.

[Problem that the invention attempts to solve]

However, with this conventional control unit position display device, there are two displays: "disconnect" and "run".
This method has disadvantages in that it requires a large number of assembly man-hours, complicates the structure, and increases costs because it can only display the same number of lines and requires stroke adjustment and positioning of the rod corresponding to the switch push rod for each circuit breaker. Furthermore, since the rod does not protrude either when the control unit is not housed in the box or when it is in operation, there is a problem in that it is impossible to determine which state it is in from the outside.

The present invention has been made in view of these conventional problems, and it is an object of the present invention to provide a device that can reliably display the operating status of a control unit.

[Means for solving problems]

In order to achieve this purpose, the control unit position display device of the present invention has an operation mechanism that connects and pulls out the unit frame by rotating an operation handle, and has a structure in which the front surface of the unit frame is closed with a door. In the control unit, an indicator bar having a tip protruding from the front side of the door and a base end located on the back side is placed at a position of the door corresponding to a plurality of stop positions of the rotating operation of the operating handle. When the door is in the closed state, the base end of the indicator bar is pressed by the operating handle or a part of the operating handle interlocking mechanism that is in the corresponding operating state. The display bar is characterized in that the tip of the display bar is configured to protrude from the surface of the door.

[Effect]

In the present invention, an indicator bar is attached to the surface of the door so that it can be freely moved in and out, corresponding to the disconnection position, the connection position, and in some cases, the test position in between.
These display bars are normally biased by a spring or the like so that they do not protrude much from the surface of the door. A part of the operating handle or the operating handle interlocking mechanism for operating the control unit faces the front of the control unit, and is disposed so as to come into contact with the base end of the display bar.

Therefore, the proximal end of the display rod at a position corresponding to the operating state of the operating handle is pushed, and the tip thereof protrudes from the surface of the door. Thereby, the operating state of the control unit can be identified by seeing which position of the display bar is protruding. If the tips of all the display rods do not protrude, it means that the control unit is not housed in the panel case.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, the case where this invention is applied to a closed switchboard will be concretely demonstrated based on the Example shown in drawing.

FIG. 4 is a cross-sectional plan view of a switchboard housing the unit frame and contact mounting frame of the present invention, and FIG. 5 is a partial front view thereof. In the figure, 1 is a panel frame constituting the box of the switchboard, 2 is a shelf plate fixed to the panel frame 1 in a required number of stages, and 3 and 4 are doors, respectively. A guide frame 2a is provided on the shelf board 2, and a unit frame 5 having a device mounting plate portion 34 for attaching various devices is inserted and mounted from the front side of the panel frame 1 along the guide frame 2a. Reference numeral 6 denotes a roller provided so that the unit frame 5 can be mounted with a light force. On the unit frame 5, a contact mounting frame 9 having a power supply contact 7 and a load contact 8 on the back side is attached to both the contacts 7, 8 using a unit frame guide portion 33 formed on the unit frame 5 as a guide.
It is attached so that it can be moved in the contact direction, that is, in the front-back direction, by the operation of an operating handle 18 and an interlocking arm 16, which will be described later. Both these contacts 7, 8
is connected to the equipment mounted on the unit frame 5 using electric wires or the like (not shown).

The panel frame 1 is provided with, for example, a three-phase, four-wire bus bar 10 and a load-side contact 11 to which the power contact 7 and the load contact 8 are connected.

Lock pins 12 are embedded in two places on the shelf board 2, and when the unit frame 5 is inserted into the shelf board 2, a lock pin 12 is attached to the unit frame 5 in the middle by a shaft 13a. The groove 13b on the front side (clockwise side) of 13 is engaged and cannot be separated. 14 is a spring for biasing the hook 13 clockwise and maintaining the engaged state, and 13c is a release lever for releasing the engagement.

As shown in FIG. 6, a protrusion 13d, a recess 13e, and a straight portion 13f are formed on the back side of the hook 13 to act on the actuator 24 fixed to the contact mounting frame 9 side. When the contact mounting frame 9 is in a disconnected position with respect to the unit frame 5, the actuator 24 pushes the protrusion 13d against the biasing force of the spring 14, as shown in FIG. 6a. It is in a slightly rotated state around the shaft 13a.
Therefore, the hook 13 is in a slightly retracted state with respect to the lock pin 12. In this state, when the unit frame 5 is inserted into the shelf board 2 together with the contact mounting frame 9, the lock pin 12 shown by the broken line in FIG.
The hook 13 moves while tilting slightly to the left, fits into the groove 13b, and settles into a solid line state. When removing the unit frame 5 from the shelf board 5, push the release lever 13c by hand to the state shown by the dashed line. The lock pin 12 and the hook 13 will be disengaged, so the unit frame 5 can be pulled out in this state. If you tighten it, you can remove it smoothly.

When the contact mounting frame 9 is in the test position or connection position with respect to the unit frame 5, if the unit frame 5 is allowed to be inserted into the shelf board 2 as it is, the contacts will be directly connected to the power supply, which is dangerous. . Also,
Even if it were possible to pull out the unit frame 5 in the test or connection position from the shelf board 2, it would still be dangerous. For this reason, the contact mounting frame 9
When the actuator 24 is in the test position and the connection position with respect to the unit frame 5, the actuator 24 is attached to the straight part 13 on the back side of the hook 13, as shown in FIG. 6b.
It is configured so as to come into contact with f. In the same figure, the position of the actuator 24 indicated by a solid line is a test position, and the position indicated by a chain line is a connection position. Contact mounting frame 9
When the unit frame is in this positional relationship, the hook 13 is sandwiched between the actuator 24 and the pin 12 and cannot be rotated. Therefore, the hook 13 prevents the lock pin 12 fixed to the shelf board 2 from entering or leaving. As a result, in the state shown in FIG. 6b, the unit frame 5 cannot be attached to the shelf board 2, and the attached unit frame 5 cannot be pulled out even if the release lever 13c is pressed. In this way, attachment and detachment of the contact at a position other than the intended disconnection position is prevented, increasing safety.

FIG. 4 shows a state in which the unit frame 5 is fixed to the shelf board 2 by engaging the hook 13 with the lock pin 12 planted on the shelf board 2 as described above.
The positions of the shelf board 2 and the unit frame 5 can be adjusted by operating the operating handle 18, which will be described below.
No matter where you move it, it remains immovable.

Next, a mechanism for moving between the unit frame 5 and the contact mounting frame 9 will be explained.

An interlocking arm 16 is attached to the unit frame 5, which is rotatable about an interlocking arm rotation shaft 15 embedded in the unit frame 5 and drives a contact. is the drive shaft 17
is installed. The drive shaft 17 is inserted into an elongated hole 16a provided at the tip of the interlocking arm 16, and is freely engaged therewith. An operating rod 19 is fixed to the base end of the interlocking arm 16 to engage with an operating handle 18 for moving the contact mounting frame 9 to the test position and the connection position.
The tip of the operating rod 19 faces an elongated hole 5b opened in the handle frame 5a on the front side of the unit frame 5.

The operating rod 19 has a built-in lock collar 21 that is pressed forward by a spring 20, and a guide hole 2 is formed in the center of the lock collar 21.
1a, and the tip of the operating handle 18 shown in FIG. 7 is inserted into this guide hole 21a. This operation handle 18 has an insertion portion 18a at the tip and a collar portion 18.
b, consisting of a small diameter portion 18c and a grip portion 18d. The grip portion 18d is coated with rubber. As shown in an enlarged view in FIG. 10, the diameter D _a of this insertion portion 18a is larger than the width w of the elongated hole 5b formed in the grip frame 5a, and the notch portions 5b-1,
It is set smaller than the diameter d ₁ of 5b-2 and 5b-3. Furthermore, the diameter D _c of the small diameter portion 18c is the same as that of the elongated hole 5.
It is set smaller than the width w of b. Tsuba 18
The diameter D _b of b is the guide hole 21a of the lock collar 21.
Of course, the long hole 5b of the grip frame 5a is larger than the diameter d ₂ of the handle frame 5a.
is larger than the width w of the cutout portions 5b-1 and 5b.
-2, 5b-3 is set smaller than the diameter _d1 .

As a result, the operating handle 18 can be opened at the notch 5b.
-1, 5b-2, and 5b-3, it cannot be inserted into the lock collar 21, and once inserted into the lock collar 21,
It cannot be removed in the middle of the elongated hole 5b, and the notch 5
It can be removed only at locations b-1, 5b-2, and 5b-3. Moreover, this notch 5b-
At locations 1, 5b-2, and 5b-3, the biasing force of the spring 20 causes the tip of the lock collar 21 to slightly protrude forward from this notch. The diameter d ₃ of the tip of the lock collar is the notch 5b.
-1, 5b-2, and 5b-3 are made slightly smaller in diameter than the diameter _d1 , and can be locked by fitting into the notch when protruding. This relationship can be expressed as follows.

D _c < w < D _a < d ₃ < d ₁ , w < d ₂ < D _b < d ₁ Therefore, insert the tip of the operating handle 18 into the lock collar 21, and while pushing it in, move the operating handle 18 as shown in the drawing. , the contactor unit 9 is moved to the test position and the connection position by turning to the right. The three large-diameter notches 5b-1, 5b-2, and 5b-3 of the elongated hole 5b in FIG. The tip of 18 can be inserted into and pulled out from the operating rod 19. If the operation of the operating handle 18 is stopped at a position other than these fixed positions, the operating handle 18 cannot be removed from the lock collar 21, so it can be identified from the outside, and the outer end of the operating handle 18 may become an obstruction. Since the door cannot be closed, it can be seen that it is not easily manipulated into position.

When the other notch 5b-1 or 5b-3 approaches the notch 5b-2 at the test position, which is an intermediate position, the notch 5b-2 swings to clear a path.
Inspection position stoppers 22 and 23 are provided to prevent movement from. This prevents the operating handle 18 from being carelessly moved from the test position to the disconnection position or the close position, and prevents it from moving directly to the connection position when attempting to move from the disconnection position to the test position. When operating the operating handle 18, the stopper 22
Alternatively, by pushing the protruding piece 22a or 23a of 23, the other end is raised so that the operating handle 18 can move freely. In addition, 25 in the figure is a contactor position display name plate, and the contactor operation mechanism, that is, the interlocking arm 16.
It displays the position of the contact and the position of the contact. FIG. 11 shows the details.

8 and 9 respectively show the operating handle 1.
8, the operating rod 19 is operated to move the contact mounting frame 9 to the test position and the connection position.

In the test position shown in FIG. 8, the power contact 7 is in contact with the busbar 10 in order to supply power to the equipment mounted on the unit frame 5, but the load contact 8 is in contact with the load side terminal 11. position to maintain sufficient clearance for disconnection. This makes it possible to supply power to the equipment being tested without supplying power to the load.

In the connection position shown in FIG. 9, the power contact 7 and the load contact 8 are both connected to the bus bar 10 and the load side contact 11, and are in a normal operating state.

When the operating rod 19 is operated at both ends of the elongated hole 5b in the grip frame 5a, and the tip of the operating rod 19 reaches the notch 5b-1 or 5b-3,
Stopper 5 to stop operating rod 19
c, 5d (see Figure 1). These stoppers 5c, 5d are made to come into contact with a trapezoidal head formed at the tip of the operating rod 19, and the side slopes of the trapezoidal head are brought into contact with the stopper surface when they come into contact with the stoppers 5c, 5d. They are made to abut at approximately right angles.

In the closed switchboard constructed as described above, as shown in FIG. 4, the position of the tip of the lock collar 21 into which the operating handle 18 is inserted changes in the disconnection position, test position and connection position. Therefore,
As shown in FIG. 1, display devices 26 are attached to three positions corresponding to the positions of the tips of the lock collars 21 on the door 3. Figure 2 shows each display device 2.
6 is a cross-sectional view showing details of FIG. Display bar 2 on door 3
7 is mounted on a display rod seat 28 so as to be slidable in the front-rear direction. 29 is an O-ring, and 30 is an E-shaped retaining ring. A display bar holder 31 is fixed to the rear end of the display bar 27 with a screw connection, and a spring 32 is provided between the display bar holder 31 and the door 3, and normally the tip of the display bar 27 is retracted. It has become a state. A recess 27a is formed on the front surface of the display rod seat 28 so that the tip of the display rod 27 can be retracted therein, and a 45° reflective surface 27b is also formed.

Three display devices 26 having such a configuration are attached to the door 3 as shown in FIG. Note that when the lock collar 21 moves from the disconnection position on the left, to the test position in the center, and to the connection position on the right as shown in FIG. 1, its tip follows an arcuate trajectory.
Therefore, the distance between the tip of the lock collar 21 and the door 3 changes. Therefore, the difference in distance is adjusted by changing the thickness of the display rod holder 31 in accordance with the change in distance. Note that it is natural that the strength of the spring 32 is set to be weaker than the strength of the spring 20 for biasing the lock collar 21.

FIG. 3 is a front view of a nameplate that displays the status of the three display devices 26. This is pasted on the corresponding position of each display device 26 on the door 3. In addition, the display bar 2 of each display device 26
By changing the color of 7, the operating state can be further identified. For example, the connected position is colored red, the test position yellow, and the disconnected position green.

In the display device of the present invention configured as described above, the tip position of the lock collar 21 is different in the disconnection position, the test position, and the connection position, so the display bar holder 31 of the display device 26 located there is pressed forward and the display is displayed. A rod 27 projects forward. This makes it possible to clearly see in which operating position the control unit is currently located. Furthermore, if the unit frame is not stored in the board case,
Since none of the display bars protrudes, it is also possible to identify that the interior is empty.

The above has described an example in which the present invention is applied to a control unit position display for a closed switchboard, but it goes without saying that the present invention can be applied to position display devices for other devices.

[Effect of idea]

As described above, in the present invention, a plurality of display devices are provided on the door of the control unit, and the display bars of the display devices protrude at positions corresponding to the operating state of the control unit. Therefore, the operating state of the control unit can be identified by looking at which position of the display bar is protruding. Moreover, when none of the tips of the display rods protrudes, it can be known that the control unit is not housed in the panel case. Since the display rod is operated by changing the mechanical position of the operating handle or a part of the operating handle interlocking mechanism, the display device itself has a simple structure and is advantageous in terms of cost.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the main part of a control unit equipped with the position display device of the present invention, Fig. 2 is a sectional view of the display device, Fig. 3 is a front view of the position display nameplate, and Fig. 4 is a plan view of the main part of the control unit equipped with the position display device of the present invention. A cross-sectional plan view of a closed switchboard showing an embodiment,
Figure 5 is a front view of the main parts, Figure 6 is an explanatory diagram showing the engagement relationship between the hook and lock pin, Figure 7 is a perspective view of the operating handle, and Figures 8 and 9 are the test position and connection, respectively. FIG. 10 is an explanatory diagram showing the relationship between the dimensions of the elongated hole, the operating handle, and the lock collar in the present invention; FIG. 11 is a front view showing details of the name plate. . 1: Panel frame, 2: Shelf board, 3, 4: Door, 5:
Unit frame, 5a: Grip frame, 5b: Long hole, 5b
-1, 5b-2, 5b-3: Notch, 5c, 5
d: Stopper, 6: Roller, 7: Power contact,
8: Load contact, 9: Contact mounting frame, 10: Bus bar, 11: Load side terminal, 12: Lock pin, 1
3: Hook, 13a: Shaft, 13b: Groove, 13
c: Release lever, 13d: Projection, 13e:
recessed part, 13f: straight part, 13g: cam part inclined surface, 14: spring, 15: interlocking arm rotating shaft, 16: interlocking arm, 16a: long hole, 17: drive shaft, 18: operating handle, 19: operating rod,
20: Spring, 21: Lock collar, 22,
23: Stopper, 24: Operator, 25: Nameplate,
26: Display device, 27: Display rod, 28: Display rod seat, 29: O ring, 30: E-type retaining ring, 31:
Display rod holder, 32: Spring, 33: Unit frame guide section, 34: Equipment mounting plate section.

Claims (1)

[Claims for Utility Model Registration] An operating mechanism for connecting and pulling out the unit frame 5 by rotating an operating handle 18;
In a control unit configured such that the front surface of the unit frame 5 is closed by a door 3, the front end of the door 3 protrudes from the front side of the door 3 and the rear side of the door 3 is located at a position corresponding to a plurality of stop positions of the rotation operation of the operating handle 18. The indicator rod 27, whose base end is located at A control unit position display device characterized in that the tip of the display bar 27 is configured to protrude from the surface of the door 3 when pressed by the operating handle 18 or a part of the operating handle interlocking mechanism in the operating state.