JP3567565B2 - Switch device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a switch device that can be switched to first, second, and third positions arranged side by side by operating a steering wheel. Station), and when switching from the "off" position corresponding to the first position to the "auto" position corresponding to the second position, the "in" position corresponding to the third position is not accidentally reached. Erroneous operation prevention lever provided with an erroneous operation prevention lever to mechanically stop the handle once in the "automatic" position and, if necessary, release the prevention through the erroneous operation prevention lever to enable switching to the "on" position The present invention relates to a switch device having a function. Here, the “ON” position is an emergency operation position that is switched by an operator on the slave station side in an emergency such as a power failure, and when switching to the “ON” position, in order to guarantee the safety of the operator, a predetermined It is necessary to check the status of the distribution system.
[0002]
[Prior art]
In order to improve the reliability of power supply to the distribution system and improve the efficiency of system operation, a system for remotely controlling switch devices (switches) installed on telephone poles in each district from the center, a so-called power distribution automation system, has been constructed. . This automatic power distribution system includes a master station control device (hereinafter, referred to as a master station) at a central office and slave stations installed on telephone poles in each district. This slave station is a core electronic circuit equipped with a microprocessor, and also includes a switch device, a control transformer, a power switch, a communication terminal box, and the like. (1) The status and system of the slave station itself including the switch device Monitoring the status of the slave station and notifying it to the master station, (2) remotely monitoring and controlling the slave station itself based on the command of the master station, (3) detecting a faulty section when an accident such as a power failure occurs, etc. With various functions.
[0003]
Turning on / off the switch device of the slave station is to give priority to the operation of the handle of the switch device to ensure the safety of on-site work.Hereafter, the remote control by the master station and its own relay based on the detection of a faulty section of the slave station It is in the order of operation. Here, the switch device can be switched to three positions of “OFF”, “AUTO”, and “ON” by operating the steering wheel, and by switching from “OFF” to “AUTO”, an automatic power distribution state is set. When switching from “off” to “automatic”, if the user accidentally reaches the “on” position, the operator may be in danger if the power distribution system is not maintained under predetermined conditions. Therefore, at the time of this switching, it is necessary to confirm in advance that predetermined conditions have been maintained or to attach a kind of safety device so as not to switch to the "on" position by mistake. As a countermeasure for the latter, conventionally, a method has been adopted in which an erroneous operation prevention mechanism is provided in a switch device of a slave station so that a handle is temporarily blocked at an "auto" position. Moreover, this erroneous operation prevention mechanism must release the blocking of the handle at the "automatic" position as required to enable switching to the "on" position. Originally, the “on” position is an emergency operation position that is switched by an operator on the slave station side in an emergency such as a power outage, for example, in order to minimize a power outage section. Of course, the emergency operation position may be returned to the “off” position by the operator depending on the situation in an emergency. In any case, when switching to the “ON” position, it is necessary to check the status of the power distribution system in advance. If the status is ignored and the status is unchecked and the status is unchecked, there is a risk that the operator may be in danger. Therefore, the erroneous operation prevention mechanism has a meaning to prevent the steering wheel from being switched from “off” to “automatic” when entering the “in” state by mistake, and to confirm the situation in advance when switching to the “on” state. There is a point to call attention.
[0004]
A conventional example (a switch device belonging to a slave station) will be described with reference to FIGS. FIG. 7 is an exploded perspective view of a conventional example, and FIG. 8 relates to a main part thereof, where (a) is a side sectional view and (b) is a front view (view from below).
In FIG. 7, although not shown here, a slave station including a conventional switch device is housed inside the closed bottom 10a of the cylindrical protective cover 10, and the shaft (for switch switching) 11 of the switch device is moved downward. Protrude into. A switching handle 14 is fixed to the shaft 11, and the fixing method will be described later in detail. The shaft 11 has a screw hole 11a formed in the lower end surface and a long hole 11b formed in the outer peripheral surface. The handle 14 is composed of a right-hand square lever part and a left-hand sector part. Above the boundary, there is a cylindrical boss 14c, through which a central hole (not numbered) passes. Play together. A screw hole is formed in the peripheral wall of the boss 14c, and the small screw 17 can be screwed in such a manner as to penetrate the center hole transversely. An arc-shaped guide hole 14a is formed in the fan-shaped portion of the handle 14 around the center hole, and an arc-shaped guide groove 14b is engraved on the upper surface of the fan-shaped portion in connection with the hole. On the other hand, a base 12 is fixed to the lower surface of the closed bottom 10a, and a round bar-shaped stopper 13 is provided upright.
[0005]
The assembly of the shaft 11 and the handle 14 will be described with reference to FIG. 7 and FIG. The handle 14 is movably fitted to the shaft 11 through the center hole of the boss 14c, and a small screw 17 is screwed into the boss 14c. The tip of the handle 14 is connected to the center hole of the boss 14c and the elongated hole 11b of the shaft 11. Make it penetrate in common. Then, the compression spring 15 is inserted into the screw hole 11a of the shaft 11, and the small screw 16 is screwed into the screw hole 11a of the shaft 11 so as to press the outer periphery of the tip of the small screw 17 at the upper end surface. At the same time, the stopper 13 is passed through the guide hole 14a of the fan-shaped portion of the handle 14. The state in which the handle 14 is mounted on the shaft 11 in this manner is as shown by a solid line in FIG. In this state, the handle 14 can be pulled down from the position indicated by the solid line to the position indicated by the alternate long and short dash line with respect to the shaft 11 against the force of the compression spring 15. The rotation can be transmitted to the shaft 11 via.
[0006]
The operation of the conventional example will be described with reference to FIGS. The solid line display in FIG. 8A shows the case where the switching position is "off" or "automatic", the dashed line display shows the case of "on", and FIG. 8 (b) shows the case of "automatic". When the handle 14 is turned from "OFF" to "automatic" as shown in FIG. 8 (b) by turning counterclockwise in the figure, the inner surface of the handle 14 in contact with the end of the guide hole 14a (upper end in the figure) Stopper 13 abuts and mechanically prevents further rotation of handle 14 toward "in". That is, the erroneous operation prevention function for the handle 14 has been activated. Next, in order to switch the handle 14 to “ON”, the stopper 13 is relatively partially pulled out from the guide hole 14a by pulling downward as shown by the dashed line in FIG. 8 (b), and then rotate counterclockwise in FIG. 8 (b). Note that, here, when switching from "automatic" to "on", a so-called manual operation automatic return type is provided, in which the hand returns from the handle 14 at the "on" position and automatically returns to the "automatic" position.
[0007]
[Problems to be solved by the invention]
The conventional example has the following disadvantages. For one thing, there is a possibility that erroneous operation prevention may not work effectively. That is, since the operator grasps the handle 14 in a posture looking up from below, the handle 14 is easily pulled downward, and there is a risk that the handle 14 is switched to the “on” position without being blocked by the “automatic” position. Second, the processing of the component parts is troublesome and leads to an increase in cost. In other words, the handle 14 has a complicated shape, and processing of the guide hole 14a and the guide groove 14b is troublesome, and processing of the shaft 11 is troublesome in processing the long hole 11a. Third, the number of parts is large, and the assembly is troublesome and leads to an increase in cost.
[0008]
The problem to be solved by the present invention is to solve the above problems of the prior art and to provide a switch device that can reliably prevent erroneous operation, and can simplify component processing and assembly work and reduce costs. It is in.
[0009]
[Means for Solving the Problems]
The present invention relates to a switch device which can be switched to first, second, and third positions arranged in parallel by operating a steering wheel,
One end is fixed to the switch body frame, the other end is an operation part, and a blocking device for the handle is provided in the middle part, and the operation part can be deformed in the direction away from the handle by pressing force applied An erroneous operation prevention lever; provided on the handle, which does not come into contact with the blocking member in the switching operation of the handle from the first position to the second position, but comes into contact with the blocking member before reaching the third position from the second position. And an abutment for blocking the handle.
[0010]
Here, the position where the blocking member contacts the contacting member to block the handle is the second position, or the handle is positioned at the first and second positions with respect to the switch body frame. The lock device is provided with a lockable lock device, or has a hollow shell structure. The lock device is capable of passing straight through the handle, and is provided on a straight path via a pressing spring provided inside the handle. It is preferable to adopt a configuration in which the pins are temporarily fixed at the respective positions, and the tips can be fitted into holes formed in the switch body frame corresponding to the first and second positions.
[0011]
Further, the present invention belongs to a power pole installation type slave station controller for power distribution automation, and the first, second, and third positions of the switching are respectively "off", "auto", and "on". It is preferable to adopt a configuration corresponding to the position.
Therefore, in the present invention, the handle is freely operated from the first position to the second position because the contact member on the handle side and the blocking member on the erroneous operation prevention lever do not abut. Before reaching the third position, for example, the abutment member and the blocking member abut at the second position and are mechanically blocked at that position. In addition, if necessary, a pressing force is applied to the operation unit to deform the erroneous operation prevention lever away from the handle, thereby displacing the blocking device. With this displacement, the contact between the blocking device and the abutment device is released, the blocking is released, and the handle can be switched to the third position.
[0012]
Further, according to the present invention, the handle can be locked to the switch body frame at each of the first and second switching positions, for example, through a locking tool in the form of a pin.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
As an embodiment of the present invention, an example of a switch device will be described below with reference to the drawings. FIG. 1 is a perspective view of the first embodiment when viewed from below. In FIG. 1, reference numeral 1 denotes a switch main body, 1a denotes a directly connected shaft for switch switching, 1b denotes a fixing bracket attached to the front surface of the switch main body 1, and 2 denotes a base frame attached to the fixing bracket. Reference numeral 3 denotes a square rod-shaped handle, which is fixed at one end to the shaft 1a and has a lock pin 5 at an intermediate position. This lock pin 5 will be described later. Reference numeral 9 denotes a front panel which is caulked to the base frame 2. On the front panel 9, display marks of "OFF", "AUTO", and "ON" are provided corresponding to three switching positions of the switch body 1 (therefore, the handle 3). Reference numeral 4 denotes an erroneous operation prevention lever, which is a spring plate-like member bent substantially in an L-shape. One end of the lever is turned back to serve as an operation portion 4a to which a pressing force is to be applied. At the same time, a blocking member 4a (see FIG. 2 to be described later) which is fixed and invisible behind the handle 3 is provided at an intermediate position. A hole 2a into which the tip of the lock pin 5 is to be fitted is made in the base frame 2 together with a hole 2b indicated by a broken line forming a pair with the hole 2a. The holes 2a and 2b correspond to "OFF" and "AUTO" positions, respectively.
[0014]
The configuration that cannot be sufficiently described in FIG. 1 will be supplementarily described with reference to FIGS. FIG. 2 is a side sectional view of the first embodiment, FIG. 3 is a front view thereof (view from below), and FIG. 4 is a sectional view taken along line AA in FIG.
In FIG. 2, the bent horizontal portion of the erroneous operation prevention lever 4 is provided with a blocking tool 4a in the form of a small screw, the tip of which is located above the handle 3, and which is not shown here. (See reference numeral 3a in FIG. 4). FIG. 4 shows three relative positional relationships U, V, and W between the handle 3 and the blocking member 4a. That is, when the blocking tool 4a takes the positional relationship of U with respect to the handle 3, it is when approaching the "auto" position from the "off" position, and when taking the positional relationship of V, the handle 3 takes the "automatic" position. (To the left in FIG. 4), and is in a state immediately before the tip of the blocking member 4a comes into contact with the contact surface 3a of the handle 3 and is blocked (just before the “automatic” position). Here, the handle 3 has a notch on the left side from the contact surface 3a, so that the tip of the blocking member 4a can pass through. Next, in FIG. 2, the erroneous operation prevention lever 4 is pressed by the operation portion 4a to bend and deform (see the broken line), and the tip end of the blocking member 4a moves upward in FIG. 3 is operated toward "ON" (to the left in FIG. 4). The state where a little operation is performed is the positional relationship of W shown in FIG. In FIG. 4, the reason why the right side portion from the contact surface 3a of the handle 3 is the slope 3b is that the handle 3 is switched to "on" and then automatically returns to "automatic". Is to slide along the slope 3b and rise to the top, and to fall along the contact surface 3a at the top, so as not to hinder the automatic return.
[0015]
Returning to FIG. 2, the structure relating to the lock pin 5 will be described. The lock pin 5 is provided so as to be able to go straight through the handle 3 in the vertical direction, and two V-grooves are engraved on the outer peripheral surface thereof. An L-shaped spring plate 6 is provided inside the handle 3, and a V-shaped bent portion is formed in a vertical portion of the spring plate 6. The V-shaped bent portion is fitted while applying a pressing force to each V-groove, and the lock pin 5 can be temporarily fixed at the position of each V-groove. When the lock pin 5 is temporarily fixed by the spring plate 6 at the lower V-groove position as shown in FIG. 2, the distal end is fitted into the hole 2b of the base frame 2, and the handle 3 is locked at the "automatic" position. (See FIG. 3). When the lock pin 5 is temporarily fixed by the spring plate 6 at the V-groove position on the upper side of the figure, the tip is pulled out from the hole 2b of the base frame 2, and the handle 3 is unlocked. Similarly, the handle 3 is locked and unlocked even in the “off” position (see FIG. 3). Originally, the switch body 1 has a function of holding at each of the positions of “off”, “automatic”, and “on”. However, the provision of the lock pin 5 further ensures the holding at each position.
[0016]
Next, a second embodiment will be described with reference to the side sectional view of FIG. The second embodiment differs from the first embodiment in the structure of the erroneous operation prevention lever. That is, the deformation structure of the erroneous operation prevention lever is a spring plate type in the first embodiment, but is a hinge type in the second embodiment. What corresponds to the erroneous operation prevention lever 4 in the first embodiment is the erroneous operation prevention lever 7 and the support portion 8. The support portion 8 is fixed to the base frame 2, and the erroneous operation prevention lever 7 and the support portion 8 are connected via a pin 8a. The erroneous operation prevention lever 7 is provided with a stopper 7a (small screw) as in the first embodiment, and a weight 7c is provided to ensure the contact / prevention operation. The operation of the second embodiment is the same as that of the first embodiment, and a description thereof will be omitted.
[0017]
Finally, a description will be given with reference to the perspective views of the first and second embodiments of FIG. In FIG. 6, a mounting beam 20 having a square hollow cross section is provided at an appropriate position of a utility pole 21 at right angles thereto, and the first and second embodiments are housed in a protective cover 10 on the lower surface side. Are set up. The handle 3 is fixed to the switching shaft 1a of each embodiment that projects downward from the closed bottom 10a of the protective cover 10. A part of the outer periphery of the lower end of the protective cover 10 is cut out, and the handle 3 is switched within the range of the cutout.
[0018]
【The invention's effect】
According to the present invention, the following excellent effects can be expected.
(1) When the present invention is applied to a power pole installation type slave station controller for power distribution automation, when switching from the "off" position corresponding to the first position to the "auto" position corresponding to the second position, an error occurs. In order not to reach the "in" position corresponding to the third position, the handle is mechanically blocked in front of the "in" position, for example in the "auto" position, by means of the erroneous operation preventing lever. Can be prevented beforehand from the possibility of occurrence of a fault related to the safety aspect of the slave station side operator due to accidental entry into the server. Also, in the event of an emergency such as a power outage, the operator checks the power distribution system for sufficient conditions, and then deforms the erroneous operation prevention lever away from the handle to displace the blocking device and block the handle in the "automatic" position. By canceling and switching to the “on” position, emergency measures such as minimizing the power outage section can be taken. In addition, since the erroneous operation is prevented by the pressing operation of the erroneous operation prevention lever different from the handle, unlike the conventional example, there is no possibility of the erroneous operation of the handle, and the operation can be reliably performed.
(2) Since the handle has a hollow shell structure, it can be reduced in weight to support operability, and at the first and second positions via a lock tool in the form of a pin, respectively. Since the frame can be locked, reliable holding at each position is guaranteed, and the reliability of the switch device can be improved. Furthermore, since the temporary fixing pressing spring is provided inside the handle, the structure is compact.
(3) As compared with the conventional example, the number of constituent parts is small, and the parts processing and assembly work are easy, so that the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of a first embodiment according to the present invention. FIG. 2 is a side sectional view of the first embodiment. FIG. 3 is a front view of the first embodiment. FIG. FIG. 5 is a side sectional view of a second embodiment according to the present invention. FIG. 6 is a perspective view of the first and second embodiments when a utility pole is installed. FIG. 7 is an exploded perspective view of a conventional example. (A) is a side sectional view, and (b) is a front view of a main part of a conventional example.
1 Switch body 1a Axis (for switch switching)
1b Fixing bracket 2 Base frame 2a, 2b Hole 3 Handle 3a Abutment surface 3b Slope 4 Erroneous operation prevention lever 4a Stopper (small screw)
4b Operation part 5 Lock pin 6 Leaf spring 7 Incorrect operation prevention lever 7a Stopper (small screw)
7b Operation part 7c Weight 8 Support part 8a Pin 9 Front panel 10 Cover 10a Sealed bottom 20 Installation beam 21 Electric pole

Claims (5)

A switch device that can be switched to each of the first, second, and third positions arranged side by side by operating a handle,
One end is fixed to the switch body frame, the other end is an operation part, and a blocking device for the handle is provided in the middle part. Erroneous operation prevention lever;
The handle is provided on the handle, and does not come into contact with the blocking member in the switching operation of the handle from the first position to the second position, but comes into contact with the blocking member before reaching the third position from the second position to block the handle. With fittings;
A switch device comprising: 2. The switch device according to claim 1, wherein the position at which the blocking member contacts the abutment member to block the handle is the second position. 3. The switch device according to claim 1, wherein the handle is provided with a locking device that can lock itself to the switch body frame at each of the first and second positions. 4. The device according to claim 3, wherein the handle has a hollow shell structure inside, and the locking tool can go straight through the handle, and on a straight path via a pressing spring provided inside the handle. A pin which is temporarily fixed at each of the two positions, and whose front end can be fitted into a hole formed in the switch body frame corresponding to each of the first and second positions. The apparatus according to any one of claims 1 to 4, wherein the first, second, and third positions belong to a power pole installation type slave station controller for automation of distribution, and the first, second, and third positions are "off" and "off," respectively. A switch device corresponding to each position of "automatic" and "on".

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