JP4506422B2 - Switch operating handle lock device - Google Patents

Description

  The present invention locks an operation handle lock device for a switch, in particular, a tilting operation handle (hereinafter abbreviated as a handle) such as a circuit breaker or an earth leakage circuit breaker in an on or off state, thereby prohibiting the opening / closing operation. The present invention relates to an operating handle lock device for a switch.

  As a switch operation handle lock device for preventing the switch handle from being operated unnecessarily, a type in which the device is once removed from the switch for each switching operation (ON or OFF), and a plurality of electrical managers are different. There is a type in which a locking member suitable for locking with a locking means, for example, a padlock, is mounted on the casing of the switch.

  As the former type, for example, when the operation handle is in a desired position (ie, on or off), a through hole provided in the operation handle is a cover (hereinafter abbreviated as a cover) that forms the casing of the switch. ), The locking members are inserted into the through holes, and a retaining member is attached so that the locking members cannot be removed. And the reliability of this locking device is raised by locking the substantially square shape part obtained with this retaining member and a locking member with a padlock etc., for example (for example, refer to patent documents 1). In the present specification, the former type will be referred to as a “simplified type” for easy understanding of the description.

  On the other hand, as the latter type, a locking member having a hole through which a plurality of padlocks pass is attached to the cover with a screw, and further, the locking member is engaged with the locking member to seal the screw, and the operation handle Prevent the ups and downs. The lock member is provided with a groove corresponding to the above-described hole, and by locking the hole with a plurality of padlocks, the reliability of the lock device is further improved with respect to the simple type (for example, Patent Document 2).

JP 2002-352687A (right column on page 3, line 5 to line 30) Japanese Patent Laid-Open No. 11-306930 (page 4, left column, lines 14 to 23)

  Since the conventional switch operating handle lock device of the switch is configured as described above, for example, in the simple type, the lock member and the retaining member can be easily separated in the state before the lock device is mounted. The troublesome management of was indispensable. Further, the operation handle is provided with a through hole, and there is a problem that the degree of freedom in the specification of the handle is limited in order to prevent strength reduction due to the through hole. Furthermore, regardless of the type, when operating the handle while the locking device is mounted, the locking member must be separated (in the simple form, naturally, the retaining member must also be separated). It was also necessary to manage the parts.

  In general, the more important the electric circuit, the stronger the locking device, specifically, the type that can use more padlocks, but the user wants a lock, depending on the required level. It is necessary to prepare a device, particularly a lock member, which is a factor that makes it impossible to unify the specifications and outer shape of the lock member.

  The present invention has been made to solve the above-described problems, and a first object is to provide a locking device composed of two parts that cannot be easily separated without providing a through-hole in the handle. It is to obtain an operation handle lock device for a switch that can be attached to the switch.

  A second object is to obtain an operating handle lock device for a switch that can be used with the lock device described in the first object for a guide member attached to a cover for locking with a plurality of padlocks.

In the operation handle lock device for a switch according to the present invention, the switch is configured to open and close the open / close mechanism inside the housing by the upside down operation handle protruding from the opening of the housing, It has a hole provided in the handle knob part and a groove part provided in the projection of the cover that forms the housing. When the hole and groove part match at the ON or OFF position of the operation handle, it is hooked into the hole via the groove part. In the operation handle lock device for a switch composed of a blocking member that holds the blocking member and the holding member that holds the blocking member, the blocking member includes a substantially C-shaped end portion and an opening end of the end portion. An extending spring portion, an engaging portion extending in a substantially C shape from the end of the spring portion, and a substantially L-shaped hook portion extending from both ends of the engaging portion. It is formed in to an elastic member Rutotomoni, the blocking member An insertion port to be inserted, a retaining portion formed to be narrower than the insertion port, and a latch that extends from the retaining portion to the opposite side of the insertion port and that engages the engaging portion of the blocking member The engaging portion is locked to the locking portion by the elastic force of the spring portion when inserted into the holding member having the storage portion and the storage portion for storing the hook portion from the insertion port through the retaining portion. It is comprised as follows.

  As described above, according to the present invention, it is possible to obtain a highly reliable operation handle lock device for a switch that can reliably lock an operation handle after installation without disabling components in a state before installation.

Embodiment 1 FIG.
FIG. 1 is an external perspective view of an operation handle lock device (hereinafter abbreviated as a lock device) for a switch according to Embodiment 1 of the present invention, and FIG. 2 is an assembly diagram showing the formation process of the lock device of FIG. And (a) to (c) are diagrams showing the assembling procedure, and FIG. 3 is an assembly diagram when the locking device of FIG. 1 is attached to the switch on the user side, (a) to (c). Indicates the installation procedure. For easy understanding, the lock members in FIGS. 2B and 2C and FIG. 3A are shown in cross-sectional views along line AA in FIG.

  In FIG. 1, the lock device 101 includes a lock member 1 that is a holding member and a return spring 2 that is an elastic member, and the shape of the return spring 2 will be described later. The lock member 1 is formed of a thermoplastic resin material such as PBT (polybutylene terephthalate) or PET (polyethylene terephthalate) having a substantially U-shaped relief on the right side from the substantially rectangular shape on the paper surface. The first locking means is a locking hole 1a, a pedestal 1b consisting of two substantially triangular projections when viewed from the side, and the above-described recess 1c serving as a relief.

  Subsequently, a method of mounting the return spring 2 will be described with reference to FIG. The return spring 2 is formed of, for example, a stainless steel wire for a spring, and is formed of the shape shown in (a), that is, the end portion 2a, the spring portion 2b, the engagement portion 2c, and the hook portion 2d. On the other hand, the internal structure of the lock member 1 is formed by an insertion port 1d, a retaining portion 1e, a locking portion 1f, and a storage portion 1g, as shown in FIG.

  The return spring 2 is a jig or the like, and by applying a load in the direction of arrow B, the return spring 2 is inserted into the insertion port 1d in a state where the hook portion 2d is bent to an appropriate position, that is, until the retaining portion 1e can be inserted. Insert in the direction of arrow C. Then, after passing through the retaining portion 1e, if the load in the arrow B direction is weakened, the engaging portion 2c is accommodated in the engaging portion 1f, and the hook portion 2d is still loaded by the accommodating portion 1g. As shown in (c), the mounting of the return spring 2 is completed. For example, at the time of shipment from the factory, the locking device 101 is in this form, and the return spring 2 does not easily come off. Therefore, a user-friendly locking device that does not fall apart and is easy to manage. Can be provided.

  Next, a procedure for incorporating the lock device 101 into the switch 102 on the user side will be described with reference to FIG. First, the switch 102 is, for example, a circuit breaker or an earth leakage circuit breaker, and includes a housing 102a including a cover 21 and a base 22 formed of synthetic resin. Inside the housing 102a is housed an opening / closing mechanism (not shown) for opening / closing an opening / closing contact, and by operating the handle 23 protruding from the opening 21a of the cover 21 with a fingertip, Opening and closing is repeated. Note that the cover 21 is provided with, for example, an arch-shaped protrusion 21b for reinforcing the insulation between the above-described fingertip and a conductive portion (not shown) disposed in the housing 102a. Are provided on both sides of the handle 23 (FIG. 3B, on the paper surface, in the left-right direction).

  Grooves 21c are provided in the protrusions 21b on both sides of the handle 23. When the switch 102 is in the off state, that is, when the handle 23 is positioned as shown in FIG. In the first embodiment, when the switch 102 is in the off state, the groove 21c and the hole 23a are arranged in the left and right directions on the paper surface of FIG. It will be arranged on a substantially straight line.

  When the lock device 101 is assembled, the return spring 2 is pulled out from the lock member 1 as shown by the broken line in FIG. At this time, the return spring 2 does not come off in the right direction on the paper surface by the end portion 2a coming into contact with the retaining portion 1e. While fitting the pulled-out hook part 2d into the groove part 21c, the lock member 1 is pushed upward in FIG. Then, the engaging portion 2c is stored in the lock member 1 by the storage portion 1g, so that the hook portion 2d is hooked in the hole 23a. That is, the relationship between the lock member 1 and the return spring 2 returns to the state before mounting, that is, the state shown in FIG. As can be seen from FIG. 3 (c), in the state in which the lock device 101 is incorporated, the return spring 2 is completely covered in the lock member 1, so that the engagement with the hole 23a is intentionally released. There is no such thing as being done.

  At this time, it is necessary to push the lock member 1 at an appropriate angle. This may be pushed in a state where the base 1 b is in contact with the surface of the cover 21. Further, since the concave portion 1c is embedded in the knob portion 23b of the handle 23, the knob portion 23b serves as a stopper, and the lock member 1 can be prevented from rotating more than necessary. Further, since the movement allowance of the hook portion 2d is the dimension D shown in FIG. 3A, a hole corresponding to this D is provided in the handle 23, that is, it is not necessary to penetrate the hole. In other words, the degree of freedom in designing the handle 23 is improved. As is clear from FIG. 3 (a), the locking device 101 thus mounted is locked with the padlock 3 as shown in FIG. 3 (c) when the locking hole 1a and the terminal end 2a coincide. Can do.

  Therefore, a highly reliable locking device can be obtained by a simple mounting method, and as can be seen from FIG. 3C, the items described on the display portion 23c of the handle 23 (OFF or OFF in this embodiment 1). IEC (International Electrotechnical Commission) standard “O” is assumed), and the contents of these items do not need to be subjected to work such as engraving on the lock member 1. In addition, in this Embodiment 1, although demonstrated as what is called an off-lock apparatus which match | combined the groove part 21c with the OFF position, the groove part 21c may be provided in an ON position, and it is good also as an on-lock apparatus. Needless to say, the groove 21c may be provided as an on / off locking device.

Embodiment 2. FIG.
In the first embodiment, it can be positioned as “simple” in terms of so-called quick attachment and detachment of the locking device, but as the name “simple” indicates, for example, when the locking device is removed. Considering the complexity of managing the locking device and the case where a plurality of electrical managers want to manage with a plurality of padlocks, it is not necessarily appropriate. Therefore, a type according to such a request will be described as a second embodiment.

  FIG. 4 is an assembly diagram when the locking device on the user side is attached to the switch according to Embodiment 2 of the present invention, and (a) to (d) show the assembly procedure. Note that the locking device itself is the same as 101 described in the first embodiment, and reference is made to FIGS.

  As shown in (a), the lock plate 11 serving as a guide member is provided on the side portion 11b having the slide portion 11a, the side portion 11b on the paper surface, and the depth side, and can be locked by a second locking means described later. A hole 11c, a mounting hole 11d for fixing the lock plate 11, a stopper portion 11e that is provided between the side portions 11b and prevents the lock member 1 from rotating, and a rotation stopper that prevents the lock plate 11 from rotating. It consists of a part 11f. After the locking device 101 shown in FIG. 2 (c) is fitted into the slide portion 11a by the projection 1h, the lock member 1 is moved to the left-end sliding restriction portion 11g on the paper surface, and FIG. 3 (a). Similarly, the return spring 2 is pulled out from the lock member 1. In this state, as in the first embodiment, the hook portion 2d is fitted into the groove portion 21c, and the switch 102 is attached to the switch 102, for example, to a switchboard or the like through the attachment hole 11d with the attachment screw 24.

  When the lock device 101 is desired to function, the lock member 1 is pushed upward on the paper surface of FIG. 4C as in the first embodiment. At this time, the slide portion 11a guides the projection 1h. Therefore, it can be smoothly mounted as compared with the first embodiment. The locking device 101 thus mounted may be locked with a padlock (not shown) through the locking hole 1a as in the first embodiment. However, in order to support more padlocks, as shown in FIG. First, after attaching a second locking means, for example, a lockout device 12, to the long hole 11c, a plurality of padlocks 3 (six in this case, only one in the drawing is described) by a plurality of electric managers. ) Can also be locked.

  As described above, since the lock is made under the unification of the intentions of a plurality of electric managers, it is particularly suitable for an important electric circuit. In addition, since the lock device 101 does not come off when the lock device is released, a more convenient lock device can be provided. Since the protrusion 1h is positioned on the slide portion 11a both before and after the lock device 101 is mounted, the lock member 1 does not rotate easily, and in particular, the strength against the return spring 2 is improved.

  Here, even if the mounting screw 24 is intentionally removed, only the lock plate 11 does not come off due to the contact between the locking member 1 that has been prevented from rotating and the stopper portion 11e. This means that the lock plate 11 needs to have a shape for sealing the mounting screw 24 or a shape that makes the long hole 11c of the lock plate 11 coincide with the locking hole 1a of the lock member 1, that is, a so-called complicated shape. In other words, as described above, the lock plate 11 has a simple shape including the side portion 11b, the long hole 11c, the attachment hole 11d, the stopper portion 11e, and the anti-rotation portion 11f, so that the cost can be reduced. it can. A further cost advantage is that the lock device 101 itself can be used as described in the first embodiment. Needless to say, this also has an advantage that the user can select the simple type or not only by preparing the lock plate 11.

It is an external appearance perspective view of the locking device in Embodiment 1 of this invention. It is an assembly drawing of the locking device in Embodiment 1 of this invention. It is an assembly drawing at the time of attaching the locking device in Embodiment 1 of this invention to a switch. It is an assembly drawing at the time of attaching the locking device in Embodiment 2 of this invention to a switch.

Explanation of symbols

1 lock member (holding member), 1a locking hole, 1d insertion port, 1e retaining portion,
1f locking part, 1g storage part, 1h protrusion, 2 return spring (blocking member),
2a terminal part, 2b spring part, 2c engaging part, 2d hook part,
3 padlock (first locking means), 11 lock plate (guide member),
11a slide part, 11c long hole, 11e stopper part, 11g sliding regulation part,
12 lockout device (second locking means), 21 cover, 21a opening,
21b Projection, 21c Groove, 23 Handle, 23a Hole, 23b Knob,
101 lock device, 102 switch, 102a housing.

Claims (9)

A switch configured to open and close the open / close mechanism inside the housing by a tilting operation handle protruding from the opening of the housing, the hole provided in the knob portion of the operation handle and the housing And a blocking member that hooks into the hole via the groove when the hole and the groove coincide with each other at the on or off position of the operation handle, In an operation handle lock device for a switch composed of a holding member for holding the blocking member,
The blocking member includes a substantially C-shaped end portion, a spring portion extending from the opening end of the end portion, an engaging portion extending from the end of the spring portion in a substantially C shape, an insertion port for the engaging portion at both ends are formed of an elastic member having a hook portion of the substantially L-shaped extending from Rutotomoni of, the blocking member is inserted, the width than the insertion port is formed narrower A retaining portion that extends from the retaining portion to the opposite side of the insertion port and that engages with the engaging portion of the blocking member; and a storage portion that houses the hook portion. The switch is characterized in that when the holding member is inserted from the insertion port through the retaining portion, the engaging portion is locked to the locking portion by the elastic force of the spring portion . Operation handle lock device. 2. The operation handle lock device for a switch according to claim 1 , wherein a width direction dimension of the terminal portion is larger than a width direction dimension of the retaining portion. The switch according to claim 1 or 2 , wherein a locking hole for mounting a first locking means for maintaining the state in which the blocking member is locked to the locking portion of the holding member is provided in the holding member. Operation handle lock device. Receiving portion of the holding member, when the blocking member is engaged with the engaging portion of the holding member, to claim 1 or 2, characterized in that it is formed to accommodate the hook portion of the blocking member An operation handle lock device for the switch according to claim. Engage the retaining member and the housing, a guide member for holding integrally the housing and the holding member, according to claim 4, characterized in that disposed on the surface of the cover forming the housing Switch operating handle lock device. 6. The operating handle lock device for a switch according to claim 5 , wherein the holding member has a protrusion, and the protrusion is formed to slide on a slide portion provided on the guide member. The operation handle lock device for a switch according to claim 5 or 6 , wherein the guide member has a stopper portion at a position opposite to the surface of the cover via the holding member. The operation handle lock device for a switch according to claim 6 , wherein the slide portion of the guide member has a slide restricting portion for restricting the sliding of the holding member. 9. The operating handle lock device for a switch according to claim 6 or 8 , wherein a long hole for locking the second locking means for preventing sliding of the holding member is provided in the guide member.

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