JPS5854523A - Operating switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operation switch that can automatically lock the lock signal when a situation occurs and display whether or not it is locked. Many valves, pumps, etc. are used as auxiliary equipment that is controlled by a switch. Normally, these operation switches are operated with sufficient precision by operators to open and close valves and start and stop pumps. In addition, even though there are two operation switches, important valves, pumps, etc. are operated using medium-sized, pull-lock type operation switches to prevent erroneous operation. In 1st grade, the operator accidentally operated a switch that should not be operated, and the pull lock operation was designed to prevent erroneous operation. ,Equipment damage and leakage of steam, water, etc.There are two types of serious accidents: In an emergency, even if the operator operates the VA, it seems that the switch cannot be operated. There is a need for an operation switch that can display when both locks are possible and when a lock is requested. The purpose is to

In the present invention, a part of the rotating shaft of the operation switch is provided with a non-circular cross-section, and this non-circular cross-section is used for locking and disengagement, and an indicator lamp is also provided to display the presence of a lock request. .

Hereinafter, two embodiments of the present invention will be described with reference to Figures IX1 to #I3. The handle 1 is fixed, the 9 rotation shafts 2 (= movable contacts 3.3 are provided, and the fixed contacts 4.4 are provided oppositely), and the display plate 5 (2 directions for operating the handle 1 to the right or left). Therefore, it is a very ordinary operation switch up to the point where the contacts 3 and 4 are opened or closed (2), but the following configuration is added.

A part 6 of the rotation shaft 2 is provided with a square cross section as the non-circular cross section 6. A locking member 7 having a U-shaped cross section and made of a magnetic member is disposed to engage this non-circular cross-sectional portion 6 from above.゛When this locking member 7 is energized to the excitation coil 8, it attracts the electromagnet 9 to the upper side s6 (not shown) by breaking the switch cover 10. When the locking member 7 engages with the non-circular cross-section portion 66 of the switch cover 10 that covers this operation switch, the opposing side walls of the switch cover 10 engage with the sides of the locking member 7 and lock. A convex portion 11 is provided to prevent rotation of the member 7.A display plate 5 (=display plate 12) is provided.The excitation coil 8 of the amstone is turned off by the emergency signal when an emergency occurs. When there is no signal (the operating power supplies P and N i are connected via the normally closed first signal contact 13 which is turned on). Two parallel normally open pushbutton switches 14 are connected to the signal contact 12 of 111. In addition, an indicator lamp 12 is connected to the operating power supplies P and H via a second signal contact 15 which is turned on when the emergency signal is present and turned on when the emergency signal is absent (normally open).

Next (double action soldering) will be explained.

When there is no emergency signal, the first signal contact 13 is on, so the excitation coil 862 is energized from the operating power supplies P and N.
゛The electromagnet 9 attracts the locking member 7. This is the first
This is the state shown in FIG. 2 and FIG.
Twisting operation of the knob 1 (C2) The rotation axis 2 can be rotated freely (it can be rotated twice, and the switch operation is free. At this time, the second signal contact 15 is off, so the display is The light of the switch 12 is off, indicating that it can be operated.

42 When an emergency situation occurs and an emergency signal is sent, the first
The signal contact 13 of 9 is turned off, and the second signal contact 15 is turned on. The first signal contact 13 is off C, also known as S:
As a result, the excitation coil 8 of the electromagnet is de-energized, the magnetic force of the electromagnet 9 also disappears, and the locking member 7 falls under its own weight onto the non-circular section 6 of the rotating shaft, as shown in Figure #I3 (: Therefore, the non-circular section I6 locks the protrusion l11 on the side wall of the switch cover 10 through the locking member 7. In this case, since the second signal contact 15 is turned on, it is displayed that the emergency signal is abnormal and the switch cannot be operated.

Resetting after the switch is locked can be done by resetting the emergency signal or by turning on the two-press button switch 14. However, in this case, the indicator lamp 12 is not turned off and indicates the state (with an emergency signal present), which can draw the operator's attention.

It should be noted that the present invention is not limited to the embodiment described above and shown in FIG.
The locking member 7 may be secured to the non-circular cross section 6 using a spring force, or the position of the locking member 7 may be adjusted to fit the handle 14 = nearer side - 2nd. It goes without saying that various modifications can be made without changing the gist of the invention.

As explained above, according to the present invention C2, a part of the rotation shaft of the operation switch (2) is provided with a non-circular cross section, and a locking member that engages with this non-circular cross section to lock the rotation is provided. , This locking member is moved by an electromagnet to engage and release the locking member, and an indicator lamp is also provided to display the lock request request. 6= From this, operation switch operation C: Regarding, Even in a state of confusion in the event of an emergency, the operation switch will be locked based on a carefully considered guideline, which will prevent erroneous operation, and an indicator lamp will light up to indicate the lock. The operation switch, which can reduce the burden of operation on the operator, has a simple structure and is inexpensive.

[Brief explanation of the drawing]

Figure JII1 is a perspective view showing the main parts of an embodiment of the operation switch of the present invention, Figure 2 is a cross-sectional view of the vicinity of the lock member in Figure 1 (= explanatory diagram with a stain circuit diagram added, Figure 3 is J
FIG. 13 is a sectional view showing a state in which the locking member shown in FIG. 12 is engaged with the non-circular cross-sectional portion 6 of the rotation shaft. l...Handle 2...Rotating shaft 3...Movable contact 4...-Fixed contact 5...Display board
6...Non-circular cross section 7...Lock member 8.
...Exciting coil 9...Electromagnet 1o...Switch cover 11...Protrusion on side wall 12...Indicator lamp 13-...First signal contact 14...Push button switch L...No. 2 signal contacts P, N...Operating power supply agent Patent attorney Inoue -Male

Claims (3)

[Claims] (1) Opening or closing the electric contact by rotating the rotation shaft (2) When the operation switch C2 is turned, a detail 6 of the rotation wheel is provided with a non-circular cross-section, and this non-circular cross-section 4 is engaged A locking member is provided to lock the rotation of the rotating shaft, and this locking member is moved by an electromagnet to engage and release the locking member, and an indicator lamp is also provided to indicate whether a locking request is required. is an operation switch characterized by nine things. (2) The shape of the non-circular cross section is square, and the lock member is a U-shaped magnetic member that falls under its own weight and locks the square cross section fs when not attracted by the electromagnet. The operation switch according to claim 1, characterized in that automatic operation is prevented by a side wall portion of a switch cover that covers the operation switch. (3) The operation switch according to claim 1 or 2, characterized in that the automatic lock signal is transmitted (52), the electromagnet is excited, and the indicator lamp is lit (6).