JPH0643957Y2 - Emergency stop switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a hand-held emergency stop switch used to manually stop an operating apparatus such as a robot by an emergency.

[Problems to be solved by conventional technology and device]

When a robot goes out of control while approaching a robot and performing a runaway operation, a switch of this type that is generally used is such that the button of a switch held by one hand is pushed by the other hand. Therefore, in an emergency, it is hard to protect yourself and you may not be able to press the button. In such a case, if the emergency stop switch operates when released, it is easy to protect one's body and safety is not impaired. However, on the other hand, there is a problem that holding it for a long time is a burden. If you do not need an emergency,
It is more convenient to press.

Therefore, it is an object of the present invention to provide an emergency stop switch that can be easily switched depending on the situation of the site of use, whether it is pressed to perform an emergency stop or released.

[Means for solving problems]

In order to achieve this object, the present invention provides a switch rod which is provided with a bridge contact and a protrusion on its circumferential surface and is manually slid against a spring, and a switch rod which is normally bridged. Position and maximum slide position 2
The pair of contact points for terminals, which are respectively arranged in parallel with each other, are brought into contact with the projection surfaces of the projections that have slid in correspondence with the slide operation positions of the two locations, and the slide operation positions of the two locations. In order to pinch the protrusions that have slid corresponding to each other closer to the peripheral surface and clamp the two locking members biased by the spring toward the peripheral surface, and to release the clamped protrusions, It is composed of a reset knob that engages with the locking member and is moved away from the normal position to the peripheral surface to move the locking member further away from the position of the protruding surface. , When the hand is released from the switch rod which is slid in correspondence with the maximum sliding position, the projection is located between the two sliding operation positions against the spring for urging one of the locking members abutting the projection surface. Characterized in that it is configured to return.

[Action]

When the emergency stop operation is performed by pushing, the protrusion is pushed from the standby position in FIG. 3a to the state in FIG. 3b by manual operation of the switch rod, as shown in FIG. When the reset knob is operated to move away as shown in FIG. 7C, the spring returns to the state shown in FIG.

When the emergency stop operation is performed by releasing the switch rod, as illustrated in FIG. 4, when the reset knob is operated to slide the protrusion to the standby position in FIG. , Is slid by the force of the associated spring against the spring for urging the locking member that is in contact with the protruding surface in the state of FIG.

[Example of device]

1 and 2 show an embodiment of the present invention.
Is a case that can be held by hand, and 3 is an operation lever that is hinged to the case 1 by a pin 2. Reference numeral 10 denotes a switch rod having a square cross section, one end of which is rounded to abut the inner surface of the lever 3 and the other end of which is loaded with a compression spring 12 to urge the lever 3 toward the operating lever 3. This switch rod can be slid along the bottom surface 1a of the case against the force of the spring 12, and its peripheral surface 10c bridges the pair of contacts spaced apart along the bottom surface 1a of the case. The bridge contact 11 and the protrusion 10a are provided.

Around the lower part of the switch rod 10, the protrusions 10a are juxtaposed with each other so that they are bridged by the bridging contacts 11 at two positions, a normal position and a maximum sliding position defined by hitting the case frames 1b and 1c, respectively. The paired connected terminal contacts 13 and 13a are arranged in a spring-biased state.

Around the upper part of the switch rod 10, corresponding to the distance between the contact points 13 and 13a so that they are urged by the springs 18 and 18a against the projecting surface 10b of the projection 10a at the two sliding operation positions and come into contact with each other. Two square-shaped locking members spaced apart
17 and 17a are arranged. Inverted T-shaped engaging pieces 20a provided on the reset knob 20 are loosely fitted into the hollow portions, so that the locking members 17, 17a are located at the peripheral surface 10c rather than the protruding surface 10b at the normal position. In other words, it can be moved downward, that is, it can be carried in a direction further away from the projecting surface 10c, that is, upward when the separation operation is performed with respect to the peripheral surface 10c.

Above the locking piece 20a of the reset knob 20, there is provided another bridge contact 21 which is biased by a spring 22 and can be displaced in the vertical direction.
Another pair of terminal contacts 13b connected in parallel to each other is arranged on 13a. By bridging any one of the paired terminal contacts 13, 13a, 13b connected in parallel, the device is made operable.

The operation of the thus configured emergency stop switch will be described with reference to FIGS. 3 and 4.

FIG. 3 shows a case where the operation lever 3 is pressed to perform an emergency stop operation. In the normal state, as shown in FIG. 3A, the lock member 17 rides on the protruding surface 10b and is biased by the spring 18 to lock the switch rod 10. The locking member 17a is in contact with the peripheral surface 10c. When the operating lever 3 is strongly grasped during an emergency stop, the switch rod 10 moves forward against the urging force of the spring 12, and the protrusion 10a disengages the lock member 17 and the lock member 1
Touch the side of 7a. As a result, as shown in FIG. 3B, the protrusion 10a is clamped by the two locking members 17, 17a that have descended, and is locked in a state in which the bridge between the contacts 13 is released.

When resetting, set the reset knob 20 to the springs 18, 18
When lifted against a, as shown in FIG. 3c, the lower surfaces of the lock members 17 and 17a are separated from the protruding surface 10b, and the switch rod 10 is pushed by the spring 12 to move the third position.
Return to the waiting position shown in FIG.

FIG. 4 shows a case where the emergency stop operation is performed when the operation lever 3 is released. By raising the reset knob 20 as shown in FIG. 3c, the contact 13b is bridged so as not to cause the emergency stop operation, and the operation knob 3 is pushed to lock the protrusion 10a on the lock member 17a and wait. (Fig. 4a). At this position, the operating lever 3 is held by hand with a force that opposes the spring 12 which becomes stronger by compression, and when the operating lever 3 is released in an emergency, the projection 10a disengages from the lock member 17a and comes to the side surface of the lock member 17. The lock members 17 and 17a come into contact with each other and are sandwiched by the lock members 17 and 17a, and the bridge between the contacts 13a is released (FIG. 4b).

Such an emergency stop switch can be incorporated in a teaching box of a robot or can be attached to a handheld control box of a device requiring an emergency stop operation outside of the teaching box.

[Effect of device]

As described above, according to the emergency stop switch of the present invention, the operation mode at the time of an emergency operation of pushing or releasing the switch rod can be selected by a simple knob operation according to the situation at the site.

Furthermore, since the reset knob has another bridge contact and another pair of terminal contacts are arranged in the separation operation path, the operation mode can be changed without performing an emergency stop during work. Make it switchable.

[Brief description of drawings]

FIG. 1 is a sectional view of a front side of an emergency stop switch according to an embodiment of the present invention, and FIG.
3A to 3C are diagrams showing the operation process of the switch of the embodiment in the push operation mode, and FIGS. 4A to 4B are diagrams showing the operation process of the switch of the embodiment in the release operation mode, respectively. is there. 10 ... Switch rod, 10a ... Projection, 10b ... Projection surface 10c ... Peripheral surface, 11 ... Bridge contact, 13,13a, 13b ... Paired terminal contact, 17,17a ... Lock member , 20 ... Reset knob.

Claims (2)

[Scope of utility model registration request] 1. A switch rod (10) provided with a bridge contact (11) and a projection (10a) on a peripheral surface (10c) and manually slid against a spring (12), and a bridge contact. A pair of contact points for terminals (13, 13a), which are arranged at two positions of the normal position and the maximum sliding position so as to be bridged in (11) and are connected in parallel with each other, and
The projections (10a) that have slid in correspondence with the slide operation positions of the points respectively come into contact with the projection surfaces (10b), and the projections (10a) that have slid in correspondence between the two slide operation positions have the circumferential surface. The two locking members (17, 17a) biased by the springs (18, 18a) toward the peripheral surface (10c) so as to further clamp the clamp (10a) and the clamped protrusion (10a). ) Is engaged with the locking member (17, 17a) and is operated to move away from the peripheral surface (10c) from the normal position so that the locking member (17, 17a) is projected ( 10b) position further than reset knob (2
0) and the force of the spring (12) of the switch rod (10) causes the protruding surface (10b) when the hand is released from the switch rod (10) that is slid in correspondence with the maximum slide position. The projection (10a) is set so as to return between the two slide operation positions against the spring (18a) that biases one (17a) of the locking members (17, 17a) abutting against the Emergency stop switch characterized in that 2. The reset knob (20) is provided with another bridge contact (21) and is further connected in parallel to the pair of terminal contacts (13, 13a) in the separating operation path of the reset knob (20). The emergency stop switch according to claim 1, wherein another pair of terminal contacts (13b) are arranged.