JPS6223204Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a switch that allows switches such as low-voltage and high-voltage electromagnetic contactors, various types of circuit breakers, and high-voltage combination starters to move in and out of the fixed-side main circuit. Regarding drawer-type switchboards.

In this type of switchboard, a drawer frame equipped with a switch is movably installed on a rail fixed to a mount base, and the switch is connected to the fixed side main circuit to open and close between the main circuits. The system is designed to move forward and backward into the operating position where the main circuit can be opened and closed, and the test position (disconnection position) where it is not possible to open or close the main circuit, but where the switch can be tested. The frame can be taken out of the panel after passing through the test position.

In the past, various mechanical and electrical locking devices have been proposed and put into practical use for the operating position and test position of the switch. The device is configured as a fixed stopper that is simply tightened and fixed to the mount base, which has the following disadvantages. That is, in order to take the drawer frame out of the panel, it is necessary to loosen the tightening screw and remove the stopper, which results in poor workability and the risk of losing the stopper components or forgetting to retighten them. On the other hand, when inserting the drawer frame outside the panel again, it is normal to stop it in the test position, operate the switch with no load to confirm that there are no abnormalities, and then move it to the operating position. In the conventional device, there is no means for regulating stopping at the test position, so it is difficult to stop at an accurate position.

The present invention is an attempt to solve the problems of the above-mentioned pull-out device.The stopper lever is pivotally attached to the drawer base so as to be rotatable and movable in the pullout direction, and the stopper lever is attached to the mount base. A fixed stopper is provided to freely engage and regulate the position of the fixed stopper, and the stopper lever is movable to be easily released from the engagement with the fixed stopper, thereby facilitating the insertion and removal of the drawer frame into and out of the panel. It is a feature.

To explain the present invention with reference to the illustrated embodiments, the first
2, 1 is a running rail laid on a mount base 2, 3 is a drawer frame equipped with wheels 4 that run on the running rail 1, and 5 is a switch mounted on the drawer frame 3 for opening and closing. At the rear of the device 5, switch side terminals 6 and 7 connected thereto are arranged. Reference numeral 8 denotes a fixed side fixed to the mount base 2 with respect to the movable switch, and this fixed side has a disconnection section 9 with the terminals 6 and 7, that is, the terminals 6 and 7.
The main circuit side terminals 10 and 11 are connected and disconnected to each other.

A stopper lever 20 is provided on the lower surface of the drawer frame 3, which cooperates with a fixed stopper 15 fixed to the mount base 2 to constitute a stopper mechanism that is a feature of the present invention. This will be explained with reference to FIGS. 3 and 4. The stopper lever 20 is provided with a long hole 21 extending in the direction of movement of the drawer frame 3 in the front part, and a fulcrum bolt 23 screwed into the long hole 21 is screwed into a fulcrum plate 22 protruding from the lower surface of the drawer frame 3.
has been inserted. Other this stop lever 20
is provided with a stopper arm 24 that protrudes laterally, and the front and rear surfaces of this stopper arm are provided with first and second contact portions 24 that abut against the fixed stopper 15, respectively.
a, 24b.

24c is an inclined guide surface connecting both the contact parts.
25 is a tension spring stretched between the tip of the stopper lever 20 and the fulcrum plate 22;
is biased in a direction in which the front and rear abutting portions of the stopper arm 24 and the fixed stopper 15 can come into contact with each other, and the stopper lever 20, which can be retracted forward and backward by a certain distance through the elongated hole 21, is positioned at the rearward end. It is energizing. Reference numeral 26 denotes a positioning member, that is, a frame member provided on the drawer frame 3, which regulates the rest position of the stopper lever 20 which is rotationally biased by the tension spring 25. It constitutes a release operation arm 27.

In this device having the above configuration, when the locking mechanism (not shown) in the operating position is released and the drawer frame 3 is pulled out toward the fixed side 8, first the first contact portion 24a on the rear surface of the stopper arm 24 of the stopper lever 20 is fixed. It comes into contact with the stopper 15 (Fig. 3). When the drawer frame 3 is further pulled out, the tension spring 2 is released as shown in FIG.
5 extends, the stopper lever 20 moves forward relative to the drawer frame 3 due to the elongated hole 21, and finally stops here. For example, this position is a test position.

To pull out the drawer stand 3 out of the panel from this state,
The operation arm 27 at the rear end of the stopper lever 20
As shown in the figure, the stopper lever 20 may be rotated to disengage the first contact portion 24a from the fixed stopper 15, and then the first contact portion 24a may be pulled out using a lifter, an extension rail, or the like. At this time, the stopper lever 20 is returned to the forward end with respect to the drawer frame 3 by the tension spring 25, and the second abutting portion 24 of the stopper arm 24
b returns to a position where they can come into contact with the fixed stopper 15 (FIG. 7). The pulled-out drawer frame 3, switch 5, etc. undergo necessary maintenance and inspection.

When inserting the drawer frame 3 from outside the panel, the above operation may be performed in reverse. That is, when the drawer frame 3 in the state shown in FIG. 7 is pushed toward the fixed side 8, the second abutting portion 24b of the stopper arm 24 and the fixed stopper 15 come into contact with each other, and the drawer frame 3 is stopped. Therefore, by setting this as the test position, the operation test and inspection of the switch 5 mounted on the drawer frame 3 can be performed without requiring any special positioning work. Note that in order to precisely match the stopping position of the drawer frame 3 when drawing out and inserting it, that is, the test position, the distance l ₁ between the first and second abutting portions 24a and 24b of the stopper arm 24 and the fixed stopper 1
5 and the effective length of the elongated hole ₂₁ , that is, the longitudinal movement distance _l3 of the stopper lever 20, may be set to be the same.

After that, the stopper lever 20 is rotated by the operating arm 27 as shown in FIG.
If the engagement between b and the fixed stopper 15 is released and the drawer frame 3 is moved toward the fixed side 8, the disconnection section 9
Switch side terminals 6, 7 and main circuit side terminal 1
0 and 11 are connected to become the operating position, and the switch 5 can be operated by operating other locking devices.

As described above, according to the present invention, when moving the switch in and out of the panel after passing through the test position, the fixed stopper provided on the mount base and the stopper lever pivoted to the drawer frame so as to be able to engage with the fixed stopper ensure reliable opening and closing. The switch can be temporarily stopped at the test position, and therefore maintenance and inspection of the switch, operation tests at the test position, etc. can be efficiently performed.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the switch drawer type switchboard according to the present invention, Fig. 2 is a side view of Fig. 1, Fig. 3 is a plan view of the main part of Fig. 1, and Fig. 4 is The side view of FIG. 3 and FIGS. 5 to 7 are plan views showing different operating states of the device shown in FIG. 2...Mount base, 3...Drawer stand, 5...
... Switch, 9 ... Disconnection section, 15 ... Fixed stopper, 20 ... Stopper lever, 24 ... Stopper arm, 24a, 24b ... Contact section, 26 ... Frame member (positioning member), 27 ... Stopper Release operation arm.
In the drawings, the same reference numerals indicate the same or relative parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A switch that can move forward and backward with respect to the fixed main circuit is provided, and this switch can be placed in an operating position where opening and closing between the main circuits is possible, and when this is not possible, the switch can be operated. In a switch pull-out type switchboard that can take a test position where tests can be performed, the pull-out pedestal 3 on which the switch is mounted is rotatable relative to the pull-out pedestal 3 about an axis 23 and reciprocating in the pull-out direction of the draw-out pedestal 3. A movably supported stopper lever 20 and a spring 25 that biases the stopper lever 20 in a predetermined direction centering on the shaft 23 are provided, and an end portion of the stopper lever 20 opposite to the portion supported by the shaft 23 is provided. is provided with an operating arm 27, and this operating arm is provided with a stopper arm 24, and the mount base 2 on which the drawer frame 3 runs has sides 24a on opposite sides of the stopper arm 24,
A fixed stopper 15 is provided which abuts on each of the drawer racks 24b and restricts the movement of the drawer frame 3, and the stopper lever 20 is moved around the shaft 23 against the bias of the spring 25 by operating its operating arm 27. The switch drawer type switchboard is characterized in that the stopper arm 24 is separated from the stopper 15 and can move the drawer pedestal 3 in the drawing direction in a state where it is rotated by a fixed amount. (2) The stopper lever is formed with a long hole 21 extending in the drawing direction of the drawer frame 3, and a shaft 23 is fitted into this long hole. Switch pull-out type switchboard. (3) The stopper arm 24 has a stopper 15 between the two side surfaces 24a and 24b that contact the stopper 15.
The switch drawer type switchboard according to claim 1, which is characterized by forming an inclined guide surface 24c that comes into diagonal contact with the switch.