JP5492402B2 - Locking unit and locking device - Google Patents

Description

  The present invention is used for selecting a control mode in a control panel of a factory facility, and a lock unit in which a rotation range of a rotor differs depending on a type of a plate key inserted into a key hole among a plurality of types of plate keys, and the lock The present invention relates to a locking device including a unit.

  The control panel for controlling the device installed in the factory, for example, cancels the automatic mode for automatically operating the device in a preset state, the setting mode for setting the operating state of the device, and the safety device of the device. A selection operation of a plurality of control modes such as a release mode is accepted. In order to switch the control mode, the control panel is provided with a locking device having a lock unit. Since the control mode selected on the control panel affects the safety during operation of the apparatus, it is necessary to change the selectable control mode according to the work level of the operator.

Therefore, in a lock unit provided in a conventional locking device, a protrusion is provided on the surface of the rotor case, and a first plate key having an extension piece that comes into contact with the protrusion when inserted into the key hole and the extension piece are provided. Some have a second plate key that they do not have. By making the rotation range of the first plate key smaller than the rotation range of the second plate key, it is possible to limit the selection of the control mode by the operator who possesses the first plate key. Such a lock is described in Patent Document 1.
Japanese Utility Model Publication No. 06-6649

  However, in the conventional lock unit that limits the rotation range of the rotor by the contact between the protrusion and the extension piece, it is necessary to form a protrusion on the rotor case, and a dedicated rotor case is used to change the rotation range of the rotor. I need it. Further, by cutting out the extended piece formed on the plate key, the limitation of the rotation range of the rotor can be easily invalidated, and the assignment of the control mode for each worker cannot be reliably maintained. .

  An object of the present invention is to provide a lock unit and a locking device that can easily change the rotation range of the rotor with a general-purpose rotor case and that makes it difficult to invalidate the limitation of the rotation range of the rotor.

As means for solving the above problems, the lock unit of the present invention includes a rotor case, a rotor, and a pin. The rotor case has a cylindrical shape. The rotor is rotatably inserted into the rotor case so as to be selectively positioned at any one of a plurality of rotational positions, and an axial key hole opened to the front surface, and a plurality of axial positions on the inner peripheral surface of the key hole. having a concave portion communicating with the outer peripheral surface along a radial direction from each. Pins are inserted movably along a radial direction of the rotor to the recessed portion. In a position opposite to the concave portion of the inner peripheral surface of the rotor case, grooves are formed. The groove portion is provided in a predetermined range in the circumferential direction of the rotor case, and the pin is inserted by a plate key inserted into the key hole.

According to this arrangement, the pin inserted in the concave portion formed in the rotor, the inserted plate key into the keyhole, fitted into a groove formed in the rotor casing, fitted with within a predetermined range in the circumferential direction of the groove Move with.

In this arrangement, may comprise a plurality of pins to form a plurality of grooves in the rotor casing, it is inserted into each of the plurality of concave portions to form a plurality of concave portions on the rotor. Each By prepares a plurality of types of plates key to form a whole or recess that is opposed to a part of the plurality of concave portions when inserted into the keyhole, depending on whether one of the leaf key is inserted into the keyway, The rotation range of the rotor can be defined as any one of a plurality of types.

Further, a neutral position in the rotor case, a first position rotated from the neutral position clockwise to a predetermined rotation angle, and a second position rotated from the neutral position counterclockwise to the predetermined rotation angle. The rotor can be selectively positioned at any one of a plurality of rotational positions including the position. In this case, by forming along the respective clockwise and counterclockwise directions across the position facing the concave portion of the rotor with the two grooves in the neutral position, the rotor in a clockwise direction by three plate key Can be selectively rotated only in the counterclockwise direction or in either direction.

  Furthermore, by providing a switch that outputs a signal corresponding to each of a plurality of rotational positions of the rotor, the selective rotation of the rotor according to the type of the plate key inserted into the keyhole can be converted into an electrical signal. .

  According to the present invention, the rotation range of the rotor can be easily changed by the general-purpose rotor case, and it is possible to prevent the limitation of the rotation range of the rotor from being easily invalidated.

  FIG. 1 is an assembly view of a locking device according to an embodiment of the present invention. The locking device 1 is, for example, a selector switch, and includes a main body 10, a lock unit 20, a cam 30, and a fixing screw 40. Used for switching the control mode.

  As an example, the main body 10 is formed in a substantially cylindrical shape with a front surface and a rear surface opened by a resin material. As an example, the lock unit 20 includes a rotor case 21 and a rotor 22 made of a metal material. The rotor 22 is rotatably held in the rotor case 21. The rotor 22 is formed with a key hole 23 opened to the front side. A plate key 50 is inserted into the key hole 23. As an example, the cam 30 is formed in a substantially cylindrical shape whose front surface is opened by a resin material, and a hole portion 31 through which the fixing screw 40 passes is formed on the bottom surface.

  The lock unit 20 is inserted into the main body 10 from the front side, and the cam 30 is inserted into the main body 10 from the rear side. Inside the main body 10, the shaft portion 20 </ b> A of the rotor 22 protruding from the back surface of the lock unit 20 is fitted into the cam 30 from the front surface side. The insertion state of the shaft portion 20 </ b> A with respect to the cam 30 is fixedly maintained by the fixing screw 40, and the cam 30 rotates integrally with the rotor 22.

  A cylindrical cam 32 is formed on the peripheral surface of the cam 30. The front end 11A of the operating member 11 (see FIG. 7) abuts (slidably contacts) the tubular cam 32 by the spring 12 from the back side. A switch unit (not shown) is connected to the opposite side of the lock unit 20 of the main body 10. The rear side end portion 11B of the operation member 11 is in contact with the movable contact of the switch portion.

  When the rotor 22 rotates through the plate key 50 inserted into the key hole 23, the contact position between the cylindrical cam 32 and the operation member 11 is displaced in the axial direction. Depending on the rotational position of the rotor 22, the movable contact of the switch unit operates, and a signal is output from the switch unit.

  The rotor 22 is configured such that the keyhole 23 can rotate within a predetermined rotation range clockwise and counterclockwise from a neutral position parallel to the vertical direction. The switch outputs signals corresponding to different control modes when the rotor 22 rotates clockwise from the neutral position to a predetermined rotation range and when it rotates counterclockwise to the predetermined rotation range.

  FIG. 2 is an assembly view of the lock unit according to the embodiment of the present invention provided in the locking device. As an example, the lock unit 20 includes a rotor case 21, a rotor 22, three disk tumblers 24, three tumbler springs 25, a side bar 26, two side bar springs 27, two mode pins 28A and 28B, and a latch. A plate 29 is provided.

  The disc tumbler 24, tumbler spring 25, side bar 26, side bar spring 27 and mode pin 28 are held by the rotor 22.

  The three disk tumblers 24 are fitted into recesses 221 formed at different positions in the axial direction of the rotor 22, and are held movably along the radial direction of the rotor 22. Each disc tumbler 24 is formed with a hole 241 having a convex portion 242. The hole portion 241 communicates with the key hole 23 in the rotor 22 in the axial direction of the rotor 22. Each disk tumbler 24 has step portions 243 formed at different vertical positions. Each disc tumbler 24 has a convex portion 242 formed at the same vertical position.

  The three tumbler springs 25 are held in the rotor 22 and each urge the disc tumbler 24 in one direction.

  The side bar 26 is fitted into the recess 222 of the rotor 22 and is held so as to be movable along a radial direction of the rotor 22 and a direction different from the moving direction of the disk tumbler. The side bar 26 includes a concave portion 261 on the inner side surface into which the step portion 243 is selectively fitted. Further, the side bar 26 includes a protrusion 262 on the outer surface.

  The side bar spring 27 biases the side bar 26 to the outside of the rotor 22.

  The two mode pins 28 </ b> A and 28 </ b> B are pins according to the present invention, and are held so as to be movable up and down along the radial direction of the rotor 22.

  The locking plate 29 is selectively attached to the plurality of recesses 211 formed on the peripheral surface of the rotor case 21 from the outside in the radial direction. Of the plurality of recesses 211, the protrusions 262 of the side bars 26 are selectively inserted into the recesses 211 where the locking plate 29 is not mounted.

  As an example, the plate key 50 inserted into the key hole 23 has two concave portions 51A and 51B formed on the upper and lower surfaces, and a key groove 52 formed on the side surface. The recesses 51 </ b> A and 51 </ b> B are formed at positions facing the holding position of the mode pin 28 in the rotor 22 in a state where the plate key 50 is inserted into the key hole 23.

  The rotor 22 stops at a rotational position where the protrusion 262 of the side bar 26 faces each of the plurality of recesses 211 in the rotor case 21. When the rotor 22 is positioned at a rotational position where the protrusion 262 faces the recess 211 where the locking plate 29 is not mounted among the plurality of recesses 211, the protrusion 262 is fitted into the recess 211 by the elastic force of the side bar spring 27. As a result, the side bar 26 moves outward. At this time, the step portion 243 does not fit into the concave portion 261, and the disc tumbler 24 can freely move in the radial direction of the rotor 22, so that the plate key 50 can be freely inserted and removed from the key hole 23.

  When the rotor 22 is positioned at a rotational position where the protrusion 262 faces the recess 211 where the locking plate 29 is mounted among the plurality of recesses 211, the side bar 26 is also moved outward by the elastic force of the side bar spring 27. Do not move. At this time, the step portion 243 is fitted into the concave portion 261, and the disc tumbler 24 is restricted from moving in the radial direction of the rotor 22, so the plate key 50 cannot be extracted from the key hole 23.

  3A to 3C are a side cross-sectional view, a cross-sectional view taken along line AA, and a cross-sectional view taken along line BB of the lock unit in a state where the first plate key is inserted into the keyhole. The first plate key 50A includes two concave portions 51A and 51B on the upper and lower surfaces, respectively. In a state where the first plate key 50A is inserted into the key hole 23 of the rotor 22 positioned at the neutral position, the lower ends of the two mode pins 28A and 28B are formed on the inner peripheral surface of the rotor case 21. The right groove portion 212 and the left groove portion 213 are inserted into the right groove portion 213. At this time, each of the two concave portions 51A and 51B of the plate key 50A is opposed to the upper end portion of each of the two mode pins 28A and 28B.

  For this reason, when a clockwise rotational force is applied to the rotor 22 by the operation of the plate key 50A, the mode pin 28A moves upward so that the upper end is fitted into the recess 51A, and the lower end is retracted from the groove 212. The rotor 22 rotates in the clockwise direction together with the plate key 50A. Further, when a counterclockwise rotational force is applied to the rotor 22 by the operation of the plate key 50A, the mode pin 28B moves upward so that the upper end is fitted into the recess 51B, and the lower end is retracted from the groove 213. The rotor 22 rotates counterclockwise together with the plate key 50A. Therefore, when the plate key 50A is inserted into the keyhole 23, the rotor 22 can be rotated from the neutral position in both the clockwise direction and the counterclockwise direction, and the rotation range of the rotor 22 is restricted to only one from the neutral position. Not.

  4A to 4C are a side cross-sectional view, a cross-sectional view taken along line AA, and a cross-sectional view taken along line BB in the state where the second plate key is inserted into the keyhole. The second plate key 50B includes one recess 51A on each of the upper and lower surfaces. The lower end portions of the two mode pins 28A and 28B are formed on the inner peripheral surface of the rotor case 21 in a state where the second plate key 50B is inserted into the key hole 23 of the rotor 22 positioned at the neutral position. The right groove portion 212 and the left groove portion 213 are inserted into the right groove portion 213. At this time, the recess 51A of the plate key 50B faces the upper end of the mode pin 28A.

  For this reason, when a clockwise rotational force is applied to the rotor 22 by the operation of the plate key 50B, the mode pin 28A moves upward so that the upper end fits into the recess 51A, and the lower end retracts from the groove 212. The rotor 22 rotates clockwise together with the plate key 50B. On the other hand, even if a counterclockwise rotational force acts on the rotor 22 by operating the plate key 50B, the mode pin 28B cannot move upward due to contact with the plate key 50B, and the rotor 22 is moved counterclockwise. Can not be rotated. Therefore, when the plate key 50B is inserted into the key hole 23, the rotor 22 is prohibited from rotating counterclockwise from the neutral position, and the rotation range of the rotor 22 is restricted only clockwise from the neutral position.

  FIGS. 5A to 5C are a side cross-sectional view, a cross-sectional view taken along line AA, and a cross-sectional view taken along line BB in the state where the third plate key is inserted into the keyhole. The third plate key 50C includes one recess 51B on each of the upper and lower surfaces. In a state where the third plate key 50C is inserted into the key hole 23 of the rotor 22 positioned at the neutral position, the lower end portions of the two mode pins 28A and 28B are formed on the inner peripheral surface of the rotor case 21. The right groove portion 212 and the left groove portion 213 are inserted into the right groove portion 213. At this time, the recess 51B of the plate key 50C faces the upper end of the mode pin 28B.

  For this reason, when a counterclockwise rotational force is applied to the rotor 22 by the operation of the plate key 50C, the mode pin 28B moves upward so that the upper end is fitted into the recess 51B, and the lower end is retracted from the groove 213. The rotor 22 rotates counterclockwise together with the plate key 50C. On the other hand, even if a clockwise rotational force is applied to the rotor 22 by operating the plate key 50C, the mode pin 28A cannot move upward due to the contact with the plate key 50C, and the rotor 22 is moved counterclockwise. It cannot be rotated. Therefore, when the plate key 50C is inserted into the key hole 23, the rotor 22 is prohibited from rotating clockwise from the neutral position, and the rotation range of the rotor 22 is restricted only from the neutral position to the counterclockwise direction.

  As shown in FIGS. 3 to 5, by selectively inserting one of the three types of plate keys 50 </ b> A to 50 </ b> C in which one or both of the recesses 51 </ b> A and 51 </ b> B are selectively formed into the key hole 23, the rotor 22 can be rotated from the neutral position only in the clockwise direction, only in the counterclockwise direction, or in both directions. By causing each worker to possess only one of the plate keys 50A to 50C according to the level, only the control mode according to the level of the worker can be executed.

  By adding the concave portion 51B or the concave portion 51A to the plate keys 50B and 50C, the restriction on the rotation range of the rotor 22 can be invalidated. However, it is difficult to accurately specify the position where the concave portion 51B or the concave portion 51A is to be formed in the plate keys 50B and 50C, and the restriction on the rotation range of the rotor 22 cannot be easily invalidated.

  FIG. 6 is a side sectional view of a lock unit according to another embodiment of the present invention. The lock unit 200 according to this embodiment holds four mode pins 28 </ b> A to 28 </ b> D on the rotor 22 movably along the radial direction of the rotor 22. Four groove portions into which the lower end portions of the mode pins 28 </ b> A to 28 </ b> D are fitted and having different circumferential ranges are formed on the inner periphery of the rotor case 21.

  By preparing a plurality of types of plate keys 50 selectively forming part or all of the recesses 51A to 51D facing the upper ends of the four mode pins 28A to 28D, they were inserted into the key holes 23. Depending on the type of the key board 50, the rotor 22 can be selectively restricted from the neutral position to a rotation range of a combination of a part or all of the four ranges.

  For example, as shown in FIG. 6A, when the plate key 50 includes two recesses 51, the rotor 22 can be rotated from the neutral position to the first and second rotation ranges. Moreover, as shown in FIG. 6 (B), when the plate key 50 includes three recesses 51, the rotor 22 can be rotated from the neutral position to the first to third rotation ranges. Further, as shown in FIG. 6C, when the plate key 50 includes four recesses 51, the rotor 22 can be rotated from the neutral position to the first to fourth rotation ranges.

  Further, by omitting a part of the four mode pins 28A to 28D, the same rotor case 21 and rotor 22 are used to constitute a lock unit having a rotation range of three or less from the neutral position of the rotor 22. be able to.

  The above embodiments are merely examples, and the present invention is not limited to these embodiments, and various modifications can be made within the scope of the present invention.

For example, the grooves 212, 213 and concave portions 221 in which the pin is inserted has been illustrated in the case of two and four, not limited to this one, may be three or five or more. Also, separate recesses 51A as an example in FIG. 2, there is shown a plate key 50 having a 51B, it may be provided with one of the recesses of the range across the recess 51A and the recess 51B in a plate key 50.

It is an assembly drawing of the locking device concerning an embodiment of this invention. It is an assembly drawing of the lock unit which concerns on embodiment of this invention with which a locking device is equipped. (A)-(C) are side sectional drawings, AA section sectional view, and BB section sectional view of a lock unit in the state where the 1st plate key was inserted in the keyhole. (A)-(C) are side sectional drawings, AA section sectional view, and BB section sectional view of a lock unit in the state where the 2nd plate key was inserted in the keyhole. (A)-(C) are side sectional drawing, AA section sectional drawing, and BB section sectional drawing of a lock unit in the state where the 3rd plate key was inserted in the keyhole. It is side surface sectional drawing of the lock unit which concerns on another embodiment of this invention. (A) is a plane sectional view of a lock unit, and (B) is a front sectional view in the BB section of (A).

Explanation of symbols

1: Locking device 10: Main body 20: Lock unit 21: Rotor case 22: Rotor 23: Key hole 28: Mode pin 50: Plate key 51A, 51B: Recess 212, 213: Groove

Claims (3)

A cylindrical rotor case;
A rotor that is rotatably inserted in the rotor case so as to be selectively positioned at any one of a plurality of rotational positions, and has an axial key hole that is open to the front surface, and a radial direction from an inner peripheral surface of the key hole. a rotor having a concave portion, the communicating with the outer peripheral surface along,
A pin inserted movably along a radial direction of said rotor to said recess,
With
Wherein a position opposed to the concave portion of the inner peripheral surface of the rotor casing, the rotor casing in the circumferential direction of the predetermined range the pin by inserted plates key the keyhole a groove provided on the fittable groove portion Formed lock unit. The groove and the pin is the concave portion which is inserted, provided in plurality along the keyhole axial direction,
The groove of the multiple, different circumferential direction of a predetermined range of the rotor casing to each other,
The plurality of rotational positions include a neutral position within the rotor case, a first position rotated clockwise from the neutral position to a predetermined rotational angle, and a counterclockwise direction from the neutral position. And a second position rotated to a predetermined rotation angle,
Wherein the plurality of grooves, sandwiching the position opposed to the concave portion of said rotor in a neutral position, in Claim 1 including first and second grooves formed along each of clockwise and counterclockwise directions The lock unit described.   A locking device comprising: the lock unit according to claim 1; and a switch that outputs a signal corresponding to each of a plurality of rotational positions of the rotor.

Images