KR101585038B1 - Lock out device of interlock switch - Google Patents

Abstract

The present invention relates to a lock-out device for an interlock switch, more particularly, to a lock-out device for interlocking an interlock switch, Out device.
The lock-out device of the interlock switch according to the embodiment of the present invention includes a door switch which is fixed to a pillar of a doorway and has a head hole to switch connection contacts when an operation key provided on the door is inserted into the head hole, And a lock-out device fixed to the support together with the switch and inserted into the key bundle to rotate and lift up and down to open or close the entrance of the head hall.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an LOCK OUT DEVICE OF INTERLOCK SWITCH,

The present invention relates to a lock-out device for an interlock switch, more particularly, to a lock-out device for interlocking an interlock switch, Out device.

When opening the door and entering the hazardous area, the operator is at risk if someone other than the worker does not know that there is a person inside the hazardous area and the door is closed and the machine is operated.

Therefore, an interlock switch is attached to the door, allowing anyone other than the operator to close the door and prevent the machine from operating, thereby protecting the person working in the hazardous area.

For example, in the dangerous area door 2 and the support 1 surrounding the vicinity of the driving range of the machine such as the work robot R shown in FIG. 1 with a fence or the like, And an interlock switch 10 for detecting the opening of the door 2 and stopping the machine.

An apparatus for preventing an operation key (actuator) from being inserted into an interlock switch (safety switch) in a state in which a door is opened in order to prevent a person other than the operator from closing the door is disclosed in Registration No. 10-0835819.

In the first embodiment of this prior patent, as shown in Fig. 2, there is provided a door switch unit 11 provided on a support column forming an edge of an entrance and a slider unit 12 provided on the door, The unit 11 and the slider unit 12 are disposed so as to face each other in a closed state of the door.

The door switch unit 11 is provided with a slide key mechanism K which is a slide key mechanism. The slide key mechanism K includes a guide 14 (see FIG. 1) in which a fitting hole portion 15, And a lock 16 is fixed to the side portion of the guide 14. [

The lock 16 rotatably supports the slide lock 17 serving as a slider movement blocking member and rotates the key 18 inserted into the hole of the lock 16 by 90 degrees to fit the slide lock 17 The engagement of the engagement hole portion 15 and the slider fitting portion 37 of the slider unit 12 can be achieved by the rotation of the slide lock 17 by 90 degrees in the hole 15.

Conversely, since the key 18 is not inserted into the hole of the lock 16, it is impossible to fit the fitting hole portion 15 and the slider fitting portion 37 in a state where the slide lock 17 is not rotated.

The slider unit 20 includes a slide base 25 and a slider 26 that slides on the slide base 25. The slider 26 is provided with a handle 30, The upper and lower arms 31 and 32 are provided so as to be orthogonal to the moving direction of the slider so that the actuator 33 is fixed to the front portion of the lower arm 32. At the front side of the slider 26, (37) is formed.

Further, the door switch unit 11 is fixed with the door switch 20 having the operating portion 22 so that the actuator 33 is suppressed.

When the actuator 33 enters the operation unit 22, the work robot is switched to the side of the main circuit (power supply circuit for the industrial machine), and the lock mechanism is automatically fixed to the actuator 33 So that the door is mechanically fixed so as not to be opened.

This prior art discloses that the lock is fixed to the slider unit, not the door switch unit, in the second embodiment.

However, this prior patent requires that the door switch unit and the sliding unit be used in unison regardless of whether the lock is installed in the door switch unit or the slider unit in order to insert the key into the hole of the lock.

In other words, in order to use a key, a slider unit must be present. When the slide lock in which the key is not inserted in the hole of the lock is not rotated, it is impossible to fit the slider fitting portion into the fitting hole portion of the door switch unit, The operator (operation key) of the door switch can not enter the operation portion of the door switch.

As described above, the conventional safety interlock switch requires a slider unit, which increases the cost.

Registration No. 10-0835819 (Registration date May 30, 2008)

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-described problems, and it is an object of the present invention to provide a lock-out device capable of preventing insertion of an operation key into an interlock switch body, The present invention provides a lock-out device of an interlock switch capable of interlocking with an interlock switch.

According to another aspect of the present invention, there is provided a lock-out apparatus for an interlock switch, the lock-out apparatus comprising: A door switch to be switched; And

A lock-out device fixed to the support together with the door switch, the lock-up device being vertically moved up and down to open or close the entrance of the head hole when the lock key is inserted into the key bundle and rotated;

.

In addition, the lockout device may include a key bundle having a hole formed therein for inserting a lock key,

A key bundle pin partially inserted into a pinhole formed on a back surface of the key bundle,

A drive shaft extruded into the key bundle pin and having a rotational shaft biased in a biased manner,

And a cam plate on which an open / close plate for opening or closing the inlet of the head hole is formed, wherein the cam plate is formed with a slot into which the rotation shaft is inserted and linearly moves when the key assembly is rotated.

Also, the key bundle, the key bundle pin, the drive shaft, and the cam plate are located inside the hexahedron-

The front face of the key bundle is exposed to the outside of the case, and the opening and closing plate protrudes and retracts downward from one side of the case having the head hole.

Also, the key bundle, the key bundle pin, the drive shaft, and the cam plate are located inside the hexahedron-

The front surface of the key bundle is exposed to the outside of the case, and the opening and closing plate protrudes and retracts downward on both sides of the case having the head hole.

The front portion of the key bundle pin is inserted into a pin hole of the key bundle in a circular shape and the rear portion is inserted into the drive shaft in a shape cut away from both sides in a circular shape and is coupled to the key bundle together with the drive shaft by a fixing nut do.

The key barrel may further include a key bar assembly for fixing the key bar assembly to the case in a C-shape having an open side, wherein the key bar assembly is provided with a fitting groove on an outer circumferential surface thereof so as to insert the key bar assembly clip therein.

In addition, the locking part is fixed to the support with the lock-out device,

And a slider unit provided with a fitting protrusion mounted on the door and fitted in the locking part and an operation key inserted into the head hole.

The slider unit includes a slider base mounted on a door and a slider slidably carried on the slider base,

The fitting protrusion is formed at the distal end of the slider and the operating key is formed at a front portion of any one of the arms protruding above and below the slider so as to be perpendicular to the slide transport direction.

According to the solution of the above-described problem, the lock-out device capable of blocking the insertion of the operation key is mounted on the interlock switch body so that it is not necessary to use the slider unit, which is structurally simple and the cost can be reduced accordingly.

1 is a view for explaining an interlock switch.
2 is a perspective view showing a conventional interlock switch.
3A and 3B are a front view and a side view of an interlock switch body according to an embodiment of the present invention.
4A and 4B are an exploded view and a combined view of a lockout apparatus according to an embodiment of the present invention.
5 is a diagram for explaining the operation relationship of the lockout device shown in FIG. 4B.
6A and 6B are views showing a case where a door is opened and closed by using a slider unit in an interlock switch body according to an embodiment of the present invention.
7 is an exploded view of a lockout apparatus according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

It is to be noted that the same components of the drawings are denoted by the same reference numerals and symbols as possible even if they are shown in different drawings.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Also, when a part is referred to as "including " an element, it does not exclude other elements unless specifically stated otherwise.

3A and 3B are a front view and a side view of an interlock switch body according to an embodiment of the present invention.

3A and 3B, a lockout device 140 is mounted on the interlock switch body 110, and more particularly, to a structure in which a lockout device 140 is mounted on a base A door switch 130 having an unlocking mechanism is fixed to the door switch 112 and a lockout device 140 is provided on the door switch 130.

Here, the lockout device 140 means that the safety device is intentionally prevented from operating due to any reason.

The lockout device 140 is surrounded by a case 141 having a hexagonal shape to protect the internal structure of the lockout device 140 and a key bundle 143 having a hole for inserting the lock key 142 thereinto.

A head hole 131 of the door switch 130 is formed horizontally so that the operation key 121 can be inserted into the lower side of the lockout device 140. On the upper side of the case 141, An entrance hole (not shown) is formed in the base so that the cam 144 can protrude and retract.

That is, the plate cam is positioned inside the case 141, and the plate cam is extended to one side of the base of the case 141, and the inlet of the head hole 131 formed horizontally below the case 141 is opened or closed.

7, the case 141 includes a main body 141b which is opened up and down, a base 141a which is assembled to the lower portion of the main body 141b, a cover 141b which is assembled to the upper portion of the main body 141b, (141c), and the key bundle (143) is coupled to the body (141b) to be exposed as a face.

When the operation key 121 is inserted into the head hole 131, the door switch 130 is configured to switch the connection contact by the movement of the operation rod (not shown) of the switch unit in response to the insertion of the operation key 121, (Not shown) for automatically and mechanically blocking the release of the operation key 121 inserted into the hole 131. When the operation key 121 is inserted into the head hole 131, The switching operation switches the circuit connection side to the main circuit side, so that the machine in the dangerous area, for example, the working robot can be operated, and the lock mechanism is operated (operated) So that the door 121 is mechanically fixed so as not to open the door automatically.

 On the other hand, for example, when a solenoid (not shown) is energized by the operation-off signal when the power supply to the work robot is operated, the lock by the lock mechanism is released and the door can be opened.

4A and 4B are exploded views of the lockout device according to an embodiment of the present invention, and the case 141 is omitted to facilitate understanding.

4A and 4B, the lockout device 140 includes a key bundle 143, a key bundle pin 145, a key bundle clip 146, a drive shaft 147, a plate cam 144, (148).

A circular pinhole 143b is formed in the rear surface of the key bundle 143 so that the lock pin 142 can be inserted into the key bundle 143 and the key bundle pin 145 can be inserted into the rear surface of the key bundle 143, And a stopper 143c is formed so as to restrict the rotation angle at 90 degrees when rotating.

In addition, a fitting groove 143d is formed on the rear side of the key bundle 143 so that the key bundle clip 146 can be inserted.

The key bundle clip 146 fixes the key bundle 143 to the case 141 in a U-shape with one side opened, and a portion of the key bundle clip 146 that is fitted in the fitting groove 143d is bent forward.

The front half of the key bundle pin 145 has a circular shape and a half of the rear half of the key bundle pin 145 is cut away from both sides of the circular shape and the front end of the circular bundle pin 145 is inserted into the pin hole 143b, 148 to the key bundle 143.

The driving shaft 147 includes a mounting plate 147a having a through hole 147b formed at the center thereof and having a shape corresponding to the rear portion of the key plate pin 145, And a rotary shaft 147c spaced apart from the rotary shaft 145 and protruding rearward.

The plate cam 144 has a cam 144b formed with a long hole 144c into which the rotation shaft 147c is inserted and a cam 144b which is bent at right angles to the cam 144b and protrudes outside the case 141, And an opening / closing plate 144a for opening or closing the opening / closing plate 144a.

The front portion of the key cluster pin 145 is inserted into the pinhole 143b formed on the rear surface of the key cluster 143 and the key cluster clip 146 is formed on the rear side of the key cluster 143 And is fitted in the fitting groove 143d.

The through hole 147b of the drive shaft 147 is extruded to the rear of the key bundle pin 145 so that the mounting plate 147a is engaged with the back surface of the key bundle 143, The key block 145 and the drive shaft 147 are coupled to the key bundle 143. [

Accordingly, when the key bundle 143 rotates, the key bundle pin 145 rotates in place and the rotation shaft 147c of the drive shaft 147 rotates with eccentricity.

At this time, the rotating shaft 147c is located inside the slot 144c of the plate cam 144. When the rotating shaft 147c rotates, the plate 144a of the plate cam 144 linearly moves up and down do.

The inner structure thus assembled is mounted inside the case 141 and the key bundle 143 is exposed to the front so that the lock key 142 can be inserted into the hole of the key bundle 143.

5 is a diagram for explaining the operation relationship of the lockout device shown in FIG. 4B.

5, when the lock key 142 is not inserted into the hole of the key bundle 143, the opening / closing plate 144a of the plate cam 144 protrudes to the lower portion of the case 141 It is impossible to insert the operation key 121 into the head hole 131 by closing the head hole 131 of the door switch 130 formed under the door 130. [

In this state, when the lock key 142 is inserted into the hole of the key bundle 143 and rotated 90 degrees, the rotation shaft 147c of the drive shaft 147 coupled to the key bundle pin 145 and the key bundle pin 145, .

The rotation shaft 147c is connected to the elongated hole 144c of the plate cam 144 so that when the rotation shaft 147c rotates, the plate cam 144 linearly moves. At this time, The head hole 131 of the door switch 130 is opened and the operation key 121 can be inserted into the head hole 131. [

3A to 5 show that the lock key 142 can be used for the lockout device 140 without using the slider unit.

6A and 6B are views showing a case where a door is opened and closed by using a slider unit in an interlock switch body according to an embodiment of the present invention.

An interlock switch body 110 including a door switch 130 is mounted to the column 1 via a base 112. In this case, an upper portion of the slider 123 is formed on the lock- The locking portion 114 is further provided to allow the fitting projection 124 to be fitted.

The slider unit 120 includes a slider base 122 mounted on the door 2 so as to face the interlock switch body 110 in a closed state of the door 2 and supporting the horizontal movement of the slider 123, And a slider 123 supported by the slider base 122 and horizontally conveyed.

Upper and lower arms 125 are provided so as to be orthogonal to the slider moving direction on the upper and lower sides of the slider 123. The door switch 130 The operation key 121 is formed toward the support post 1 so that the operation key 121 can be inserted into the head hole 131 of the support post.

The opening and closing plate 144a of the plate cam 144 is lowered in a state in which the door 2 in which the lock key 142 is not inserted is opened in the hole of the key bundle 143 as shown in FIG. The operation key 121 can not be inserted into the head hole 131 even when the slider 123 of the slider unit 120 is forcibly moved. So that it can not be inserted into the portion 114.

Accordingly, if there is an operator in the dangerous area with the door 2 opened and the lock key 142 held, the door 2 can not be locked, and power is not supplied to the machine in the dangerous area, for example, The operator is in a state where operation is impossible, so that the operator can see the balloon safely.

When the worker finishes the operation in the dangerous area and inserts the lock key 142 into the hole of the key bundle 143 and rotates it by 90 degrees, the key bundle pin 145 and the key bundle pin 145 The rotation shaft 147c of the driven shaft 147 is rotated.

The rotation shaft 147c is connected to the elongated hole 144c of the plate cam 144 so that the plate cam 144 performs a linear movement when the rotation shaft 147c is rotated, The state in which the opening and closing plate 144a rises to open the head hole 131 of the door switch 130 and insert the operation key 121 of the slider unit 120 into the head hole 131 of the door switch 130 .

6B, the slider 123 of the slider unit 120 is slid to the support 1 side to insert the operation key 121 into the head hole 131, and the fitting protrusion 124 is inserted into the lock portion 114 ).

In such a state, the operation of the door switch 130 switches the circuit connection to the main circuit side so that the machine in the dangerous area, for example, the working robot can be operated, and the lock mechanism automatically opens the door As shown in Fig.

When the door 2 is opened and the lock key 142 is removed using the lock key 142 as described above, the operation key 121 is prevented from being inserted into the door switch 130, You can go into the area and use it with various devices. Since the lock key 142 is owned and entered, it is possible to prevent an accident that the user is trapped in a dangerous area.

In the conventional art, since the lock key and the slider unit are interlocked, the lock key can not be used without the slider unit. However, according to the present invention, since the lockout device is mounted on the interlock switch body, Can be prevented.

7 is an exploded view of a lockout apparatus according to another embodiment of the present invention.

4A and 4B, the head hole 131 is formed in the door switch 130 so that the operation key 121 can be inserted into only one side of the door switch 130. However, 121 may be inserted into the head hole 131.

In order to open or close both side openings of the head hole 131 at this time, the plate cam 144 includes a cam 144b having a slot 144c into which the rotating shaft 147c is inserted as shown in FIG. 7, Closing plate 144a which is bent at right angles at both sides of the head hole 144b and opens and closes the both side inlets of the head hole 131 while coming and going out of the case 141. [

To this end, two projecting and recessing holes 141a 'are formed on both sides of the base 141a of the case 141 so that the two opening and closing plates 144a can project and retract.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. In addition, it is a matter of course that various modifications and variations are possible without departing from the scope of the technical idea of the present invention by anyone having ordinary skill in the art.

100: interlock switch 110: interlock switch body
120: Slider unit 121: Operation keys
130: Door switch 131: Head hole
140: Lock-out device 142: Lock key
143: key bundle 144: plate cam

Claims (8)

A door switch which is fixed to the support of the doorway and has a head hole formed horizontally and in which a connection contact of the switch part is switched when an operation key formed in the slider unit horizontally conveyed by the door is inserted into the head hole; And
A lock-out device fixed to the support together with the door switch, the lock-up device being vertically moved up and down to open or close the entrance of the head hole when the lock key is inserted into the key bundle and rotated; , ≪ / RTI &
The door switch is configured such that when the slider unit is horizontally fed toward the support and the operation key is inserted into the head hole, the connection point of the switch is switched by the movement of the operation rod of the switch part, The circuit connection is switched to the main circuit side by the switching operation of the connection contact so that the machine in the dangerous area can be operated and the locking mechanism is fixed so as not to be opened with respect to the operation key Lock-out device of an interlock switch. The method according to claim 1,
The lockout device includes a key bundle having a hole formed therein for inserting a lock key,
A key bundle pin partially inserted into a pinhole formed on a back surface of the key bundle,
A drive shaft extruded into the key bundle pin and having a rotational shaft biased in a biased manner,
A cam plate on which an opening / closing plate for opening or closing the inlet of the head hole is formed,
Lock-out device according to claim 1, 3. The method of claim 2,
Wherein the key bundle, the key bundle pin, the drive shaft, and the cam plate are positioned inside the hexahedron-
Wherein the front face of the key bundle is exposed to the outside of the case, and the opening and closing plate protrudes and retracts downward from one side of the case having the head hole. 3. The method of claim 2,
Wherein the key bundle, the key bundle pin, the drive shaft, and the cam plate are positioned inside the hexahedron-
Wherein the front face of the key assembly is exposed to the outside of the case, and the opening and closing plate protrudes and retracts below both sides of the case having the head hole. 3. The method of claim 2,
Wherein a front portion of the key bundle pin is inserted into a pinhole of a key bundle in a circular shape and the rear portion of the key bundle pin is inserted into the drive shaft in a shape cut away from both sides in a circular shape and is coupled to the key bundle together with the drive shaft by a fixing nut. Lockout device of lock switch. 3. The method of claim 2,
The key lock assembly according to claim 1, further comprising a key lock assembly for fixing the key lock assembly to the case in a U-shaped configuration with one side thereof opened, wherein the key lock assembly includes a fitting groove formed on an outer circumferential surface of the key lock assembly, Out device. The method according to claim 1,
A locking part is fixed to the support with the lock-out device,
Further comprising: a slider unit mounted on the door and fitted to the lock portion; and a slider unit formed with an operation key inserted into the head hole. 8. The method of claim 7,
Wherein the slider unit comprises a slider base mounted on a door and a slider slidably carried on the slider base,
Wherein the fitting protrusion is formed at a front end portion of the slider and the operation key is formed at a front portion of any one of the arms protruding above and below the slider so as to be orthogonal to the slide transport direction.

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