JPH11213820A - Operating key device for safety switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an operating key device for a safety switch which can be applied to doors having various open-and-shut directions, despite. its being a single component part. SOLUTION: A horizontal key way 5 and a vertical key way perpendicular to the horizontal key way 5 are formed on a base 1, and a vertical adjustment leg part 17 and a horizontal adjustment leg part 18 are formed at one side part of a base part 13a of a key body 13A of the operating key 13, a spring 19 is contained in a spring containing recessed part 8, and the horizontal adjustment leg part 18 is inserted into the horizontal key way 5, and the vertical adjustment leg part 17 is inserted into the vertical key way 9 so as to respectively contact with the spring 19. A horizontal oscillation fulcrum and a vertical oscillation fulcrum are provided at the base part 13a of the operating key 13, a horizontal adjusting screw for pushing down the horizontal adjusting leg part 18 against the spring 19 is provided to the base 1, and a vertical adjusting screw for pushing down the vertical adjusting leg part 17 against the spring 19 is provided to the base 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation key device of a safety switch used for detecting lock of a door of a safety fence of equipment such as a machine tool.

[0002]

2. Description of the Related Art Generally, a safety switch is mounted at an entrance of a safety fence of equipment such as a machine tool, and a door for opening and closing the entrance is provided with an operation key device for a safety switch for operating the safety switch.

The operation key device K for the safety switch
Has a base 71 as shown in FIGS. 14 to 16, and the base 71 has a key mounting portion 72 at the center thereof.
An adjustment screw mounting seat portion 73 is formed in a part of the key mounting portion 72. A key groove 74 is formed in the key mounting portion 72 along the longitudinal direction (left-right direction) of the base 71, and a spring receiving recess 75 is formed on the bottom of the key groove 74 on the adjustment screw mounting seat 73 side. It is formed.

The operation key 76 has a key body 76A. The key body 76A has a pair of side pieces 7 on its front side.
7 and a cross member 77a is provided between the side pieces 77. An adjusting leg 78 is formed at the right edge of the base of the key body 76A.
Reference numeral 8 is parallel to the surface of the base of the key body 76A and protrudes to the right of the base of the key body 76A.

A spring 79 is accommodated in the spring accommodating recess 75, and a base side of an operation key 76 is inserted into the key groove 74, and a pin hole 76a provided in the base is inserted into the spring.
The support shaft 71A provided on the base 71 is inserted therethrough.
The adjusting leg 78 is inserted into the keyway 74.

The adjusting screw mounting seat 73 is provided with an adjusting screw 70 screwed into a screw hole (not shown). In this case, the adjusting leg 68 is pushed up by the spring 79, and the adjusting leg 68 is in contact with the head 70A of the adjusting screw 70 from below.

By tightening the adjusting screw 70 to fix the adjusting leg 78 against the spring 79, the operation key 76 can be set in a neutral state in the horizontal direction XX. By loosening the adjusting screw 70 and holding the adjusting leg 78 by the spring 79, the operation key 76 can be swung in the horizontal direction XX.

Further, an operation key device K for a safety switch
Doors that move horizontally in the horizontal direction at the entrance of the safety fence of equipment such as machine tools, doors that open and close horizontally around vertical columns, and doors that open and close vertically around horizontal columns There is a door to do.

As shown in FIG. 17, the operation key device K for the safety switch configured as described above is provided with a vertical support 69 provided at the entrance of a safety fence of equipment such as a machine tool.
An operation key 76 is attached to a door 69 which opens and closes in a horizontal direction about A. Attach safety switch B to the safety fence.

In this state, the door 69 is
It swings back and forth around A to open and close the entrance of the safety fence. The distance L from the swing fulcrum Q of the door 69 to the operation key device K for the safety switch is determined by the rotation for key lock. Radius. Therefore, since the turning radius is present, in the safety switch key device K, the operation key 76 is swung in the horizontal direction, so that the operation key 76 can be easily inserted into the key insertion opening of the safety switch B.

An operation key device K for a safety switch
As shown in FIG. 18, there is a door 69-1 that opens and closes in a vertical direction YY around a horizontal support 69A-1, as shown in FIG. The operation key device K cannot be attached, and a dedicated safety switch operation key device K-1 is attached to the door 69-1.

The safety switch B includes a head 80 and a switch section 8 as shown in FIG.
1, a lock unit 82 for locking the switch unit 81 in the ON operation state, a solenoid 83 for releasing the lock by the lock unit 82, and a detection switch unit 83-1 for detecting the lock release by the solenoid 83. .

[0013] As shown in FIG. 19 (2), the lock of the cam 84 is released by inserting the operation key 76, and the cam 84 is rotated and the first plunger 85 slidably contacting the cam 84 is moved. The connected second plunger 86 moves toward the head 80 due to the biasing force of the return spring 87, and the contact surface 86 at the end of the second plunger 86
A retracts into the guide wall 89 from the plunger guide 88.

As described above, the second plunger 86 is moved to the maximum position. In the switch section 81, the movable contact 87a of the first movable piece 87 becomes the fixed contact 89a of the first fixed terminal 89. , The first switch portion 90 is turned on, and the movable contact 91 a of the second movable piece 91 is fixed to the fixed contact 92 a of the second fixed terminal 92.
The second switch 93 is turned off, and it is confirmed that the switch 81 has been operated.

In this case, the third plunger 96 of the lock portion 82 moves forward by the urging force of the return spring 97, and the third plunger 96 comes into contact with the contact surface 86A of the end of the second plunger 86. Then, the switch unit 81 is locked in the ON operation state.

Then, as shown in (3) of FIG. 19, the solenoid 83 is energized to connect the fourth member connected to the iron core member 83a.
Of the third plunger 96 by returning the third plunger 96 to the return spring 97.
Is moved against the second plunger 86.
The third plunger 96 is removed from the contact surface 86A at the end of the switch 81, and the lock of the switch unit 81 is released.

In this case, due to the movement of the fourth plunger 94, the movable contacts 98a at both ends of the movable piece 98 become fixed contacts 99 of the fixed terminal 99 in the detection switch section 83-1.
It is switched off from the position a. Therefore,
Since the detection switch unit 83-1 is turned off, the lock release by the solenoid 83 is detected.

In order to turn off the switch section 81, the operation key 76 is pulled out.
That is, by pulling out the operation key 76, the cam 84 is pulled down by the cross member 77a of the operation key 76, and the cam 84 is rotated in the reverse direction. By the reverse rotation of the cam 84, the second plunger 86 connected to the first plunger 85 slidingly contacting the cam 84 moves to the side opposite to the head 80 side against the return spring 87. The contact surface 86A at the end of the second plunger 86 is
8 protrudes.

For this purpose, in the switch section 81, the movable contact 87a of the first movable piece 87 is separated from the fixed contact 89a of the first fixed terminal 89, and the first switch 9
0 is turned off, and the movable contact 91a of the second movable piece 91 contacts the fixed contact 92a of the second fixed terminal 92, and the second switch 93 is turned on.

[0020]

However, in the above-mentioned conventional operation key device for safety switches,
Vertical support 6 provided at the entrance of the safety fence of equipment such as machine tools
Only the operation key 76 is mounted in the horizontal direction on the door 69 which opens and closes in the horizontal direction around the 9A, and the door 69-1 which opens and closes in the vertical direction about the horizontal support 69A-1 is as described above. There is a problem that the operation key device K for the safety switch cannot be attached.

The present invention has been made in view of the above problems, and a first object of the present invention is to apply the invention to a door which is a single component but has a different opening and closing direction. An operation key device for a safety switch is provided.

Also, a second object of the present invention is to adjust the swing angle of the operation key according to the turning radius of the door, and to easily insert the operation key into the key insertion slot of the safety switch. It is an object of the present invention to provide an operation key device for a safety switch.

[0023]

According to a first aspect of the present invention, there is provided an operation key device for a safety switch, wherein the operation key is inserted into a key insertion opening of the safety switch. In an operation key device for a safety switch that operates a switch portion of a safety switch, the operation key is mounted on a base so as to be swingable in two orthogonal directions, and the base is mounted on the base in one of two orthogonal directions of the operation key. A swing adjustment means for adjusting the swing angle in the other direction, and another swing adjustment means for adjusting the swing angle in the other direction of the two orthogonal directions of the operation key. I do.

With this configuration, the operation key can be set in a neutral state in two orthogonal directions by operating one and the other swing adjusting means, and the operating key can be operated by operating the one swing adjusting means. Can be pivoted in one of two directions orthogonal to each other, and the other key can be operated to be in a neutral state by operating the other key, and one key can be operated. Thus, the operation key can be set in a neutral state, and the other swing adjustment means can be operated to enable the operation key to swing in the other of the two orthogonal directions.

Also, for example, a door that moves linearly in the horizontal direction at the entrance of a safety fence of equipment such as a machine tool, a door that opens and closes horizontally around a vertical column, and a door that opens and closes horizontally around a horizontal column. There is a door that opens and closes, but a door that moves linearly in the horizontal direction has a safety switch operation in which the operation key is neutralized in two orthogonal directions by operating one and the other swing adjustment means as described above. A key device can be applied.

Further, an operation key device for a safety switch which can swing an operation key in one of two orthogonal directions (horizontal direction) can be applied to a door which opens and closes in a horizontal direction. For a door that opens and closes in a vertical direction, an operation key device for a safety switch that can swing in the other direction (vertical direction) of two orthogonal directions can be applied.

As described above, the operation key device for a safety switch can be applied to doors having different moving and opening / closing directions.

According to a second aspect of the present invention, there is provided an operation key device for a safety switch according to the first aspect of the present invention. The one adjustment leg and the other adjustment leg are formed on one side edge of the base of the key body, and the operation key can be swung in two directions orthogonal to the base at the base. Attachment, the one swing adjusting means is provided on the base with an elastic member for pushing up the one adjusting leg, and the one adjusting member on the base is pressed down on the one adjusting leg against the elastic member. And the other swing adjusting means is provided on the base with an elastic member that pushes up the other adjusting leg, and the other adjusting leg is pressed down on the base against the elastic member. Which is configured by providing the other adjustment member.

With this configuration, one of the adjusting members and the other adjusting member are adjusted to the tightening side so that the one adjusting leg and the other adjusting leg are fixed against the elastic member, so that the operation key can be operated. It can be in a neutral state in two orthogonal directions, and it is also possible to adjust one adjusting member to the loosening side, hold one adjusting leg by the elastic member, and adjust the other adjusting member to the tightening side. By fixing the other adjustment leg, the operation key can be swung in one of two orthogonal directions. Also, the other adjusting member is adjusted to the side to be loosened, the other adjusting leg is held by the elastic member, and the one adjusting member is adjusted to the side to be tightened, so that one adjusting leg is fixed, so that the operation is performed. The swing of the key in the other direction among the two orthogonal directions can be enabled.

Therefore, an operation key device for a safety switch in which operation keys are in a neutral state in two orthogonal directions can be applied to a door that moves linearly in a horizontal direction. In addition, an operation key device for a safety switch, which can swing an operation key in one of two orthogonal directions (horizontal direction), can be applied to a door that opens and closes in a horizontal direction, An operation key device for a safety switch that can swing in the other direction (vertical direction) among two orthogonal directions can be applied to a door that opens and closes in a vertical direction.

As described above, the operation key device for a safety switch can be applied to doors having different movement and opening / closing directions.

According to a third aspect of the present invention, there is provided an operation key device for a safety switch, wherein the base has a horizontal keyway and a right angle to the horizontal keyway. A vertical key groove is formed, and a spring accommodating recess is provided at the bottom of each of the horizontal key groove and the vertical key groove, and the operation key is vertically adjusted on one side edge of the base of the key body. Forming a leg and a horizontal adjustment leg, making the horizontal adjustment leg parallel to the surface of the base of the key body, and positioning the vertical adjustment leg with respect to the surface of the base of the key body. It is formed by bending at right angles,
A spring is accommodated in each of the spring accommodating recesses, and the horizontal adjustment leg is inserted into the horizontal key groove and the vertical adjustment leg is inserted into the vertical key groove in contact with the spring. A horizontal swing fulcrum and a vertical swing fulcrum are provided at the base of the key, and a horizontal adjustment screw is provided on the base to push down the horizontal adjustment leg against the spring. A vertical adjusting screw is provided to push down the direction adjusting leg against the spring.

With this configuration, the horizontal adjustment screw and the vertical adjustment screw are tightened together to fix the horizontal adjustment leg and the vertical adjustment leg against the spring, thereby allowing the operation keys to be moved in the horizontal and vertical directions. It can be neutralized in the vertical direction, and the horizontal adjustment screw can be loosened, the horizontal adjustment leg can be held by the spring, and the vertical adjustment screw can be fixed by tightening the vertical adjustment screw. Thus, the operation key can be swung in the horizontal direction. In addition, the vertical adjustment screw is loosened to hold the vertical adjustment leg with a spring, and the horizontal adjustment screw is tightened to fix the horizontal adjustment leg, allowing the operation key to swing vertically. Can be

Therefore, an operation key device for a safety switch in which operation keys are neutral in the horizontal direction and the vertical direction can be applied to a door that moves linearly in the horizontal direction, and a door that opens and closes in the horizontal direction can be used. Can be applied to an operation key device for a safety switch that allows the operation key to swing in the horizontal direction, and a door that opens and closes in the vertical direction allows the operation key to swing in the vertical direction. An operation key device for a safety switch can be applied.

As described above, the operation key device for a safety switch can be applied to doors having different moving and opening / closing directions.

According to a fourth aspect of the present invention, there is provided an operation key device for a safety switch, wherein the operation key is inserted into a key insertion opening of the safety switch. In the operation key device for a safety switch that operates the unit, the operation key is swingably attached to the base, the operation key is urged in one direction by elastic urging means, and the operation key is swung to the base. A swing adjusting means for adjusting a moving angle is provided.

With this configuration, when an operation key device for a safety switch that enables the operation key to be vertically swung is applied to the door that opens and closes in the vertical direction, the door is swung according to the turning radius of the door. By operating the adjusting means to adjust the swing angle of the operation key, it is possible to easily insert the operation key into the key insertion opening of the safety switch.

According to a fifth aspect of the present invention, there is provided an operation key device for a safety switch according to the fourth aspect of the present invention. A torsion coil spring,
The swing adjusting means is an adjusting screw provided on the base.

With this configuration, the same operation and effect as the above-described fourth aspect can be obtained.

[0040]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of an operation key device for a safety switch according to the present invention, FIG. 2 is a cross-sectional view taken along line CC of FIG. 1, and FIG. 3 is a cross-sectional view taken along line DD of FIG.

The key device A for a safety switch according to the present invention includes a base 1, and the base 1 has a key mounting portion 2 at the center thereof, and the left side of the key mounting portion 2 has a key. A groove forming portion 3 and a key attaching portion 2
On the right side, a horizontal adjustment screw mounting seat 4A is formed at the front thereof and a vertical adjustment screw mounting seat 4B is formed at the rear thereof. A horizontal key groove 5 is formed along the longitudinal direction (left-right direction) of the base 1 from the flat top 3A of the key groove forming portion 3 to the horizontal adjustment screw mounting seat 4A.
The end wall portion 6 of the groove portion 5A straddling the key groove forming portion 3 has an inclined surface, and the front wall portion 7 of the groove portion 5A also has an inclined surface. Further, a spring accommodating recess 8 is formed at the bottom of a groove portion 5B that straddles the horizontal adjustment screw mounting seat portion 4A of the horizontal key groove 5.

In the vertical adjustment screw mounting seat 4B,
Vertical keyway 9 perpendicular to horizontal keyway 5
The vertical key groove 9 has a spring receiving recess 10 formed at the bottom thereof. A screw hole 11 is formed in the horizontal adjustment screw mounting seat 4 and a screw hole 12 is formed in the vertical adjustment screw mounting seat 4B. The horizontal keyway 5 and the vertical keyway 9 constitute a keyway F. Further, mounting holes 1A are formed on the left and right sides of the key mounting portion 2 of the base 1.

The operation key 13 has a key body 13A, and the key body 13A has a pair of side pieces 1 on its front side.
4 and a cross member 15 is provided between the side pieces 14. A shaft hole 16 is formed in the base 13a of the key body 13A. A vertical adjustment leg 17 and a horizontal adjustment leg 18 are formed vertically on the right side edge of the base of the key body 13A, and the horizontal adjustment leg 18 is provided at the base of the key body 13A. It is parallel to the surface and protrudes to the right of the base of the key body 13A.
The vertical adjustment leg 17 projects rearward in a direction perpendicular to the surface of the base of the key body 13A.

A spring 19 is provided in the spring accommodating recess 8.
A spring 20 is housed in each of the spring accommodating recesses 10, and a base 13 a side of the operation key 13 is inserted into the key groove F. The horizontal adjustment leg 18 is inserted into the groove portion 5B of the horizontal key groove 5, and the vertical adjustment leg 17 is inserted into the vertical key groove 9.

The horizontal adjustment screw mounting seat portion 4A is screwed into the screw hole 11 so that the horizontal adjustment screw 22
However, the screw hole 1 is provided in the vertical adjustment screw mounting seat 4B.
2 are provided with vertical adjustment screws 23 respectively. In this case, the horizontal adjustment leg 18 is pushed up by the spring 19, and the horizontal adjustment leg 18 is in contact with the head 22A of the horizontal adjustment screw 22 from below,
The vertical adjustment leg 17 is pushed up by a spring 19, and the vertical adjustment leg 17 is in contact with the head 23A of the vertical adjustment screw 23 from below.

One swing adjusting means comprises a spring 19 which is an elastic member for pushing up the horizontal adjusting leg 18 which is one adjusting leg, and a horizontal adjusting screw 22 which is one adjusting member. And the other swing adjustment means is
It comprises a spring 20 which is an elastic member for pushing up the vertical adjustment leg 17 which is the other adjustment leg, and a vertical adjustment screw 23 which is the other adjustment member.

Therefore, when the horizontal adjustment screw 22 and the vertical adjustment screw 23 are each loosened to the maximum, the horizontal adjustment legs are set as shown in (1), (2) and (3) of FIG. The portion 18 is pushed up by a spring 19, and the vertical adjustment leg 17 is pushed up by a spring 19, so that the operation key 13 is in the horizontal direction XX and to the left, and its horizontal swing support point S. By swinging around the support shaft 21, the left side piece 14 of the operation key 13 comes into contact with the inclined end wall portion 6 of the groove portion 5A of the horizontal key groove 5, and the inclination angle θ is about 15 degrees. Further, the operation key 13 swings in the vertical direction Y-Y and downward about the vertical swing fulcrum P passing through the support shaft 21 so that the operation key 13
Abuts against the inclined front wall portion 7 of the groove portion 5A of the horizontal key groove 5, and the inclination angle θ ′ is about 15 degrees.

When the horizontal adjustment screw 22 and the vertical adjustment screw 23 are tightened to the maximum, respectively, as shown in FIGS. 5 (1), (2) and (3), The horizontal adjustment leg 18 is pressed against the bottom of the horizontal keyway 5 against the spring 19 by the spring 22, and the vertical adjustment leg 17 is moved by the vertical adjustment screw 23 to the spring 2.
The operation key 13 is pressed against the bottom of the vertical key groove 9 against 0, is in the horizontal direction XX, and is in a neutral state without swinging to the left, and its inclination angle θ is 0 degree. The operation key 13 is in the vertical direction Y-Y, is in a neutral state without swinging downward, and has a tilt angle θ of 0 degrees.

A safety switch key device A of the present invention is provided at a door 31 which swings back and forth around a vertical support 30 as shown in FIG. The operation key 13 is mounted using the mounting hole 1A of the base 1 so that the operation key 13 is horizontal. Attach safety switch B to the safety fence.

In this state, the door 31 is
, The opening and closing of the entrance of the safety fence by opening and closing, and the distance L1 from the swing fulcrum R of the door 31 to the key device A for the safety switch is a turning radius for the key lock. is there. Therefore, because of this rotation radius, in the safety switch key device A, the operation key 13 can be easily inserted into the key insertion opening of the safety switch by swinging the operation key 13 in the horizontal direction. It is.

In this safety switch key device A, in order to swing the operation key 13 in the horizontal direction, as shown in FIGS. 6 (1), (2) and (3), the horizontal adjustment screw 22 is used. After loosening, the horizontal adjustment leg 18 is pushed up by the spring 19, and the operation key 13 can be swung in the horizontal direction XX about the support shaft 21 which is the horizontal swing support point S. This swing range is about 15 degrees.

The safety switch key device A of the present invention is provided at the door of a safety fence of a machine tool or the like at a door 41 which swings back and forth around a horizontal support 40 as shown in FIG. Then, the operation key 13 is mounted using the mounting hole 1A of the base 1 such that the operation key 13 is horizontal. Attach safety switch B to the safety fence.

In this state, the door 41 is
Is pivoted in the front-rear direction to open and close the entrance of the safety fence. The distance L2 from the swing fulcrum T of the door 41 to the key device A for the safety switch is a turning radius for the key lock. is there. Therefore, since the turning radius is present, the operation key 13 can be easily inserted into the key insertion opening of the safety switch by swinging the operation key 13 in the vertical direction in the key device A for the safety switch. It is.

In this safety switch key device A, the operation key 13 is swung up and down by turning the horizontal adjustment screw 22 as shown in FIGS. 7 (1), (2) and (3). Loosen the vertical adjustment screw 23 in the tightened state,
The vertical adjustment leg 17 is pushed up by the spring 20 and the operation key 13 is moved in the vertical direction Y-Y, and the vertical swing support point P
Swing around the center. This swing range is about 15 degrees.

Further, as shown in FIG. 10, a door 51 which moves in the left-right direction is provided at the entrance of a safety fence of equipment such as a machine tool.
Next, the key device A for safety switch of the present invention is mounted on the mounting hole 1 of the base 1 such that the operation key 13 is vertical.
Attach using A. Attach safety switch B to the safety fence.

In this case, the horizontal adjustment screw 22 and the vertical adjustment screw 23 are each tightened to the maximum, and as shown in FIGS. 5 (1), (2) and (3), the horizontal adjustment screw 22 Presses the horizontal adjustment leg 18 against the bottom of the horizontal key groove 5 against the spring 19, and the vertical adjustment screw 23 causes the vertical adjustment leg 17 to resist the vertical key groove 9 against the spring 20. To make the operation key 13 neutral without tilting the operation key 13 with respect to the horizontal direction XX and the vertical direction YY.

Therefore, according to the first embodiment described above, the horizontal adjustment screw 22 and the vertical adjustment screw 23
By tightening together, the horizontal adjustment leg 18 and the vertical adjustment leg 17 are fixed against the springs 19 and 20 so that the operation key 13 is neutral in the horizontal direction XX and the vertical direction YY. And the horizontal adjustment screw 22 can be loosened to loosen the horizontal adjustment leg 1.
8 is held by a spring 19, and the vertical adjustment screw 23 is tightened to fix the vertical adjustment leg 17 so that the operation key 13 can be swung in the horizontal direction XX. Also, the vertical adjustment screw 23 is loosened to hold the vertical adjustment leg 17 with the spring 20, and the horizontal adjustment screw 22 is tightened to fix the horizontal adjustment leg 18.
In the vertical direction Y-Y.

Therefore, the operation key device A for the safety switch in which the operation key 17 is in a neutral state in the horizontal direction XX and the vertical direction YY is applied to the door 51 which moves linearly in the horizontal direction XX. In addition, the operation key device A for a safety switch that enables the operation key 13 to swing in the horizontal direction XX can be applied to the door 31 that opens and closes in the horizontal direction XX, Vertical direction Y
The operation key device A for a safety switch that enables the operation key 13 to swing in the vertical direction Y-Y can be applied to the door 41 that opens and closes in −Y.

As described above, the operation key device A for a safety switch can be applied to the doors 51, 41, and 31 having different moving and opening / closing directions.

(Second Embodiment) FIGS. 11 to 13 show a second embodiment of the operation key device for a safety switch according to the present invention. The operation key device A for a safety switch includes a base 60. The base 60 is formed by bending a metal plate by press working, and is formed at both ends of the base body 60A at right angles to the surface 60a. A screw seat portion 61 is formed by bending, and a support portion 62 is formed on the left and right sides of the base body 60A by being bent at right angles to the surface portion 60a, and a left and right side of the base body 60A. A mounting portion 63 having a mounting hole 64
Is formed. A screw hole 65 is formed in one of the screw seat portions 61, and an adjusting screw 66 as swing adjustment means is screwed into the screw hole 65.

The operation key 67 is formed by bending a metal plate like a base 60 by press working.
A pair of side pieces 68 are provided on the front side thereof, and a cross member 69 extends between these side pieces 68. The right and left sides of the base 67A of the operation key 67 are perpendicular to the surface. A mounting piece 70 is formed by bending the mounting piece 70, and a shaft hole 71 is formed in the mounting piece 70.

The base 60 has a pair of support portions 6.
2 and the mounting piece 70 is inserted into the mounting hole 6 of the support portion 62.
An operation key 67 is attached by inserting a support shaft 72 into a shaft hole (not shown) of the mounting piece 4 and the mounting piece 70, and the operation key 67 can swing vertically using the support shaft 72 as a swing support point. .
A torsion coil spring 73 as an elastic biasing means is attached to the support shaft 72. One end 73a of the torsion coil spring 73 is in contact with the surface of the base 60, and the other end of the torsion coil spring 73 The part 73b is an operation key
7 is in contact with the base. The operation key 67 is tilted toward the adjustment screw 66 by the urging force of the torsion coil spring 73 and is in contact with the end of the adjustment screw 66.

A safety switch key device A of the present invention is provided at a door 36 which swings back and forth around a horizontal support 35 as shown in FIG. The operation key 67 is mounted horizontally using the mounting portion 63 of the base 60. Attach safety switch B to the safety fence.

In this state, the door 36 is
Is pivoted in the front-rear direction to open and close the entrance of the safety fence. The distance L2 from the swing fulcrum T of the door 36 to the key device A for the safety switch is a turning radius for the key lock. is there. Therefore, since the turning radius is present, in the key device A for the safety switch, the operation key 67 can be easily inserted into the key insertion opening of the safety switch B by swinging the operation key 67 in the vertical direction. It is possible.

[0065]

As described above, according to the operation key device for a safety switch according to the present invention, one and the other swing adjusting means are operated to make the operation key neutral in two orthogonal directions. The operation key can be operated in one of two orthogonal directions by operating one of the swing adjustment means, and the operation key can be neutralized by operating the other swing adjustment means. The operation key can be set to a neutral state by operating one of the swing adjustment means, and the operation key can be set to the other one of two orthogonal directions by operating the other swing adjustment means. A swing in the direction can be made possible.

Further, for example, a door that moves linearly in a horizontal direction at the entrance of a safety fence of equipment such as a machine tool, a door that opens and closes horizontally around a vertical column, and a door that opens and closes horizontally around a vertical column. There is a door that opens and closes, but a door that moves linearly in the horizontal direction has a safety switch operation in which the operation key is neutralized in two orthogonal directions by operating one and the other swing adjustment means as described above. A key device can be applied.

Further, an operation key device for a safety switch which can swing an operation key in one of two orthogonal directions (horizontal direction) can be applied to a door which opens and closes in a horizontal direction. For a door that opens and closes in a vertical direction, an operation key device for a safety switch that can swing in the other direction (vertical direction) of two orthogonal directions can be applied.

As described above, the operation key device for a safety switch can be applied to doors having different moving and opening / closing directions.

According to the operation key device for a safety switch according to the present invention, the operation key device for a safety switch that operates the switch portion of the safety switch by inserting the operation key into the key insertion opening of the safety switch. Wherein the operation key is swingably mounted, the operation key is biased in one direction by elastic biasing means, and the base is provided with a swing adjusting means for adjusting a swing angle of the operation key. Therefore, when an operation key device for a safety switch that enables the operation key to swing in the vertical direction is applied to the door that opens and closes in the vertical direction, the swing adjusting means is operated according to the turning radius of the door. By adjusting the swing angle of the operation key, the operation key can be easily inserted into the key insertion opening of the safety switch.

[Brief description of the drawings]

FIG. 1 is a plan view of an operation key device for a safety switch (first embodiment) according to the present invention.

FIG. 2 is a sectional view taken along line CC of FIG.

FIG. 3 is a sectional view taken along the line DD in FIG. 1;

FIG. 4A is a plan view of the operation key device for a safety switch when the operation keys are free in a horizontal direction and a vertical direction. (2) is a longitudinal sectional view of the operation key device for the safety switch. (3) is a cross-sectional view of the operation key device for the safety switch.

FIG. 5A is a plan view of an operation key device for a safety switch when the operation keys are in a neutral state in a horizontal direction and a vertical direction. (2) is a longitudinal sectional view of the operation key device for the safety switch. (3) is a cross-sectional view of the operation key device for the safety switch.

FIG. 6A is a plan view of the operation key device for a safety switch when the operation keys are free only in the horizontal direction. (2) is a longitudinal sectional view of the operation key device for the safety switch. (3) is a cross-sectional view of the operation key device for the safety switch.

FIG. 7A is a plan view of an operation key device for a safety switch when the operation keys are free only in the vertical direction. (2) is a longitudinal sectional view of the operation key device for the safety switch. (3) is a cross-sectional view of the operation key device for the safety switch.

FIG. 8 is a perspective view showing a state in which an operation key device for a safety switch of the present invention is mounted on a door that opens and closes in a horizontal direction.

FIG. 9 is a perspective view showing a state in which the operation key device for a safety switch of the present invention is mounted on a door that opens and closes in a vertical direction.

FIG. 10 is a perspective view showing a state in which the operation key device for a safety switch of the present invention is mounted on a door that moves linearly.

FIG. 11 is a plan view of a safety switch operation key device (second embodiment) according to the present invention.

FIG. 12 is a front view of the safety switch operation key device (Embodiment 2).

FIG. 13 is a side view of the safety switch operation key device (Embodiment 2).

FIG. 14 is a plan view of a conventional safety switch operation key device.

FIG. 15 is a sectional view taken along line GG of FIG. 14;

FIG. 16 is a sectional view taken along the line HH in FIG. 14;

FIG. 17 is a perspective view showing a state in which a conventional safety switch operation key device is mounted on a door that opens and closes in a horizontal direction.

FIG. 18 is a perspective view showing a state in which an operation key device for a safety switch is mounted on a door that opens and closes in a vertical direction.

FIGS. 19 (1) to (3) are explanatory diagrams of the operation of the safety switch.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Base 5 Keyway for horizontal 9 Keyway for vertical 13 Operation key 13a Key body 17 Vertical adjustment leg (the other adjustment leg) (the other swing adjustment means) 18 Horizontal adjustment leg (one adjustment leg) Part) (one swing adjusting means) 19 spring (elastic member) 20 spring (elastic member) 22 horizontal adjusting screw (one adjusting member) 23 vertical adjusting screw (the other adjusting member)

Claims (5)

[Claims] 1. An operation key device for a safety switch for operating a switch portion of the safety switch by inserting an operation key into a key insertion opening of the safety switch, wherein the operation key can be swung in two directions orthogonal to a base. And a swing adjusting means for adjusting a swing angle of the operation key in one of two orthogonal directions, and a swing angle of the other direction in the two orthogonal directions of the operation key. An operating key device for a safety switch, wherein the other swing adjusting means for adjusting the pressure is provided. 2. The operation key, wherein the one adjustment leg and the other adjustment leg are formed on one side edge of a base of a key body, and the operation key is provided on the base at the base. The one swing adjusting means is provided so as to be capable of swinging in two orthogonal directions, and the base is provided with an elastic member for pushing up the one adjusting leg, and the base is provided with the one adjusting leg by the elastic member. The other swing adjustment means is provided on the base with an elastic member for pushing up the other adjustment leg, and the other adjustment leg is provided on the base. The operation key device for a safety switch according to claim 1, wherein the other adjustment member is provided to press down the second member against the elastic member. 3. A horizontal keyway and a vertical keyway perpendicular to the horizontal keyway are formed in the base,
A spring accommodating recess is provided at the bottom of each of the horizontal keyway and the vertical keyway, and the operation key is formed with a vertical adjustment leg and a horizontal adjustment leg at one side edge of the base of the key body. The horizontal adjustment leg is formed parallel to the surface of the base of the key body, and the vertical adjustment leg is formed by bending at a right angle to the surface of the base of the key body, A spring is accommodated in the spring accommodating recess, and the horizontal adjustment leg is inserted into the horizontal key groove, and the vertical adjustment leg is inserted into the vertical key groove by abutting on the spring. A horizontal swing fulcrum and a vertical swing fulcrum are provided at the base of the key, and a horizontal adjustment screw is provided on the base to push down the horizontal adjustment leg against the spring. Direction adjustment leg against the spring An operation key unit for Deposit switch, characterized in that a vertical adjusting screw depressing Te. 4. An operation key device for a safety switch for operating a switch portion of the safety switch by inserting an operation key into a key insertion opening of the safety switch, wherein the operation key is swingably mounted on a base, An operation key device for a safety switch, wherein the key is urged in one direction by an elastic urging means, and swing adjustment means for adjusting a swing angle of the operation key is provided on the base. 5. The operation key device for a safety switch according to claim 4, wherein said elastic urging means is a torsion coil spring, and said swing adjusting means is an adjusting screw provided on said base.