JPS6240510Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a handle device for a switch, a breaker, etc.

In other words, the present invention relates to a handle device in which the handle is freely suspended from its axis under normal conditions, and the handle can only be operated when the handle is grasped. It is a measure of sexual improvement.

The handles of conventional switches, disconnectors, etc. are fixed to the shaft, so there is a risk of malfunction if the handle is accidentally touched or hit by an object. .

Here, one example of the shinoki disconnector will be explained with reference to Figs. 1 to 4. Fig. 1 is a front view, Fig. 2 is a front cutaway view showing the link mechanism, Fig. 3 is a side view,
FIG. 4 is a sectional view taken along line A-A' in FIG. 3. In each figure, 1 is a wire cutter installed on the pillar 2,
Reference numeral 3 denotes an insulating cover attached to cover the support frame 4, and a vacuum valve 5 is installed inside the insulating cover.
5a is its operating axis.

Furthermore, 6 is a handle, 7 is a handle shaft, and the handle shaft 7 and the operating shaft 5a are interlocked via a link mechanism housed in a cover 9. The outline of the link mechanism is shown in Figure 2, with a, b, c,
d is a support shaft fixed to the mounting plate 8 within the cover 9, and the handle shaft 7 and the operating shaft 5a are interlocked by links, levers, etc. supported by each shaft.
To briefly explain each member, 10 is the handle shaft 7
It is connected to a handle receiver 12 via a link 11. Handle receiver 12
is supported on a support shaft A, and is swung by the operation of the handle 6. When swung to the left, the breaker contact opens, and when swung to the right, the contact closes.

In the center of the handle receiver 12, there is a catch 13 that is almost orthogonal thereto, and one end (right side in the figure) is supported by a support shaft C, but the tip of the other end (left side in the figure) is normally It is latched to the catch receiver 14 and placed at a fixed position. The catch receiver 14 is
The latch 15, which is activated when an abnormal current flows through the breaker, releases the catch 14, thereby allowing the catch 13 to swing freely.

In the center of the catch 13, there is a connecting pin 1 at the center.
One link 17 end of the double link flexibly connected at 6 is connected with a pin, and the other link 18 end is
A pin is connected to the center of the operating lever 19. The operating lever 19 is substantially parallel to the catch 13, and is swingably supported by a support shaft b.

The double links 17 and 18 are set so that they are approximately straight when the connecting pin 16 is located on the right side of the spindle A of the handle receiver 12 in the figure, and when they are straight, the upper link 17 The implanted pin 20 contacts the lower edge of the catch 13 and is prevented from swinging further to the right in the figure. Further, when the right end side in the figure of the operating lever 18 swings upward, the upper edge of the tip engages with a stopper (not shown) provided on the support shaft C of the catch 13. A lock lever 21 is placed on the free end side of the actuating lever 19 and is biased toward the left in the figure, and the tip of the actuating lever 19 engages with a step 21a provided on the side edge of the lock lever 21 to lock it. It is becoming more and more common. The lock lever 21 is pushed when the handle receiver 12 swings to the right in the figure, and the step portion 21a and the actuating lever 1
Disengage 9.

The operating lever 19 is connected to the operating shaft 5 via the link 12.
A crossbar that is connected to a lever 23 that can swing freely around a as its axis and swings together with the lever 23 (Fig. 4)
is provided, and the tip thereof is a movable stud 25.
engages the outer end of the The inside of the movable stud 25 is inserted into the vacuum container 27 of the vacuum valve 5, the movable contact 28 on the end face faces the fixed contact 29, and is always biased in the open direction by a normally open spring 30 and a spring 31. ing. The vacuum valve 5 is opened and closed by the swinging movement of the operating lever 19. 2
6 and 26 indicate main circuit terminals.

Then, both ends of an opening/closing spring 33 of a compressible spring (tension spring) are engaged between the stop member 32 at the tip of the handle receiver 12 and the connecting pin 16 of the double links 17 and 18. Further, both ends of the auxiliary spring 35 are engaged between the connecting pin 16 and the pin 34 at the tip of the operating lever 19.

The handle 6 and its shaft 7 are linked with the operating shaft 5a by the linkage mechanism outlined above, and the vacuum valve 5 is opened and closed by operating the handle, but in the past, the handle 6 was fixed to its shaft 7. This resulted in the following drawbacks. In other words, (a)
If an external force other than the operation is applied to the handle 6, the shaft 7 will also rotate as the handle rotates, potentially causing malfunction. (b) If the handle is protruding from the surface of the switchboard, there is a strong possibility that external force may be applied to the handle, such as by passersby, transporting machinery, or mischief by outsiders.
(c) Accidents caused by malfunctions of switches, circuit breakers, etc. can cause major damage such as power outage accidents, and must be prevented.

The present invention improves the above-mentioned drawbacks and will be described below with reference to FIGS. 5A, B, and C.

As can be seen from the figure, the handle 6 according to the present invention
is not fixed to the shaft 7 and is configured to engage only when tilted forward at a predetermined angle. That is, a small diameter shaft portion 7a is provided at the tip of the handle shaft 7 protruding from the hole 36 of the frame surface 38.
The small diameter shaft portion 7a is fitted into a shaft insertion hole 37 provided at the tip of the handle 6. A collar 7b is provided at the end of the small diameter shaft portion 7a to prevent the shaft insertion hole 37 of the handle from being inserted or removed. The small diameter shaft portion 7
The diameter of the shaft insertion hole 37 of the handle fitted in a is:
The diameter of the small diameter shaft portion 7a is slightly larger than that of the small diameter shaft portion 7a, and a gap G is formed therebetween. Further, the tip of the handle 6 is bent at a substantially right angle to form a protrusion 6a at a bent portion 6b.

On the other hand, numeral 39 is a display plate/rotation plate which is fitted onto the handle shaft 7 and fixed with a pin 40. A large number of rotation connection holes 41 are provided in the frame surface of the rotation plate 39 in the circumferential direction. Further, on the periphery of the rotary plate 39, there are scales 42 for indicating ON, OFF, TRIP, RESET, etc., and correspondingly, a pointer display 43 is attached on the frame surface 38.

In the above configuration, as can be seen from FIG. 5C,
When the handle 6 hangs down vertically due to its own weight, the protrusion 6a at the tip does not fit into the rotation connection hole 41 of the display plate/rotation plate 39, and is in the state shown by the two-dot chain line in the figure. The protrusion 6a engages with the rotation connection hole 41 only when the lower part of the handle is tilted toward the user. Therefore, the distance _l1 between the inner surface of the handle 6 in the hanging state and the tip of the protrusion 6a, and the distance between the inner surface of the handle 1 and the front surface of the display plate/rotation plate 39.
l ₂ establishes the relationship l ₁ < l ₂ . The width _l3 of the small diameter shaft portion 7a is set to be larger than the thickness of the handle 6, and a gap G' is formed therebetween. This is necessary for inserting the portion 6a into the rotation connection hole 41. Further, the distance l ₄ between the handle 6 and the frame surface 38 is set so that the handle cannot be reached when the handle is in a hanging state.

In the handle device having the above-mentioned configuration, the handle 6 is normally hanging down and free from the shaft 7, and when operating a switch, breaker, etc., the lower part of the handle 6 is grasped and pulled towards the user, tilting it to the state shown by the two-dot chain line in Figure 5C, whereby the protrusion 6a engages with the pivot connection hole 41, and when the handle 6 is turned in this state, the handle shaft 7 also rotates integrally, and the switch, etc. can be turned between the ON and OFF states.

Since the handle device according to the present invention is configured as described above, it has the following effects. In other words, except when the operator grasps the handle and pulls it forward, the handle hangs down and is free from the axis, so it is susceptible to external forces caused by falling equipment or moving equipment during natural disasters. Even if the handle is activated, the handle will only spin idly, and there is no risk of the switch, disconnector, etc. malfunctioning. Also, during the closing operation of the breaker,
If a trip command is issued in the event of an accident, the engagement between the handle and its shaft can be easily released, thereby reducing the impact that the operator receives due to the handle following action, making it safer. In addition, since the handle is machined from a flat plate, it is easy to process, mass-producible, and can be produced at low cost. Since the rotary plate also serves as a display plate, there is no need for a display pointer. Also, the distance l ₂
Since the relationship of >l ₁ is established, there is an effect that the handle protrusion does not engage with the rotation connecting hole due to movement of the handle during hanging down.

[Brief explanation of the drawing]

Figure 1 is a front view of the chopper and disconnector, Figure 2 is a diagram showing the outline of the internal link mechanism by cutting away the display board in Figure 1, Figure 3 is a side view, and Figure 4 is Figure 3. A-
A sectional view taken along line A', FIGS. 5A and 5B are front views of the handle device according to the present invention, and FIG. 5 is a sectional view thereof. 6...Handle, 6a...Protrusion, 7...Handle shaft, 37...Hole, 38...Frame surface, 39...Display plate/rotation plate, 41...Rotation connection hole.

Claims (1)

[Scope of utility model registration request] In handle devices such as switches and disconnectors,
The shaft 7 protruding outward from the frame surface 38 is loosely fitted into the hole 37 provided at the tip of the handle 6, and the tip of the handle is bent at a right angle to provide a protrusion 6a, and the other handle is A collar is fixed to the shaft 7 to prevent the handle 6 from coming off, and a rotation connecting hole 41 is formed in which the protrusion 6a can be engaged by tilting the handle 6 while it is fitted onto the shaft 7. A handle device for a switch or the like, characterized in that a display plate/rotation plate 39 having a circumferential shape is fixedly provided.