Handle locking device for switch

Abstract

The object of the present invention is to obtain a handle locking device that does not hinder operability and can prevent erroneous operation. It has a handle fixing portion (2) and a locking portion (3). The handle fixing portion (2) is configured to have: a concave cap portion (2c) that opens at one end of a frame-shaped portion (2w); and an extension portion (2e) that extends obliquely from the other end of the frame-shaped portion (2w) toward one end, forming an insertion hole (2hl) and covering the handle (8) through longitudinal movement. The locking portion (3) has: a plate-shaped portion (3t) that has a shape extending toward the extension portion (2e). The cap portion (2c) is provided with a connecting hole (2ch) connected to the through hole (8h) of the handle (8), the pin-shaped portion (3p) is embedded in the through hole (8h) via the connecting hole (2ch), and the through hole (3h) is connected to the insertion hole (2hl).

Description

Technical Field

[0001] The present invention relates to a handle locking device for a switch having a manually operated handle for opening and closing circuit contacts. Background Art

[0002] As a means for preventing erroneous operation of a handle that switches on and off in switchgear such as circuit breakers and residual current circuit breakers, a handle locking device has been proposed. This device utilizes a padlock to prevent the movement of the handle. For example, in a handle locking device (e.g., see Patent Document 1), a plate having an insertion hole at a predetermined position is attached to the main body in a manner that stands upright along the side of the handle. The padlock inserted through the insertion hole restricts the movement of the handle.

[0003] In addition, a handle locking device has been proposed (for example, see Patent Document 2), in which a through-hole extending in the forward and rearward directions is formed in the grip portion of the handle, and a base into which an opening protruding toward the handle is embedded is integrally formed with a cap-shaped member that covers the handle. In this handle locking device, a U-shaped notch is formed in the cap-shaped portion that overlaps the through-hole. By inserting a padlock into the through-hole, the handle locking device is locked, and the movement of the handle is restricted at the base portion.

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 2008-186644 (paragraphs 0004-0005, 0013-0017, Figures 5 and 6 、 Figures 1 to 4 )

[0005] Patent Document 2: Japanese Patent Application Laid-Open No. 2010-160924 (paragraphs 0010 to 0015, Figures 1 to 5 )

[0006] However, in a structure where the handle has a side mounting plate, adjacent circuit breakers may interfere with the padlock in narrow circuit breakers, potentially preventing locking. Alternatively, in a structure where the padlock is inserted through the through-hole in the handle, such as when the operating surface is covered by a panel, problems may arise where the vertical dimension is limited, such as the panel being unable to open with the padlock engaged. Summary of the Invention

[0007] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a handle locking device that can prevent erroneous operation without hindering workability even in a circuit breaker having limited width and vertical dimensions.

[0008] The lock mechanism of the present invention is characterized in that it comprises a first component and a second component, the first component comprising: a frame-shaped portion which surrounds the opening and has a pressing surface which presses the operating surface; a cap portion which is open at one end of the pressing surface side of the frame-shaped portion and is formed into a concave shape to match the angle of the handle which is laid down toward one side of the connection or disconnection; and an extension portion which extends obliquely from the other end of the frame-shaped portion toward the one end in a manner separated from the pressing surface, forming an insertion hole which passes through the handle in parallel with the operating track surface. The first component is configured to cover the cap portion with the handle by movement in a direction parallel to the operating track surface. The second component comprises: a plate-shaped portion, which has an opposing surface opposite to a surface perpendicular to the operating rail surface formed on the one end side of the extending portion and is formed with a through hole; and a pin-shaped portion, which extends in a direction parallel to the opposing surface and the pressing surface when the opposing surface is made opposite to the surface of the extending portion. The second component is configured to assemble the first component to the covered switch by movement in a direction perpendicular to the operating rail surface, and the cap portion of the first component is provided with a connecting hole, which, when covered on the handle, is connected to a through hole formed on the handle and passes through a direction perpendicular to the operating rail surface. The configuration is such that when the second component is assembled to the switch covered with the first component, the pin-shaped portion is embedded in the through hole via the connecting hole, and the through hole is connected to the insertion hole.

[0009] Effects of the Invention

[0010] According to the handle locking device of the present invention, the latch of the padlock is passed through the hole provided inside the rail of the handle, so that the workability is not hindered in a switch with limited width and vertical dimensions, and erroneous operation can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a perspective view showing the handle locking device according to the first embodiment of the present invention and the circuit breaker to which the handle locking device is to be installed, before and after installation, respectively.

[0012] Figure 2 It is a perspective view of a circuit breaker to which the handle locking device according to the first embodiment of the present invention is to be mounted, and a partial side view of the handle and its surroundings.

[0013] Figure 3 These are external views of a handle fixing portion, which is a first component constituting the handle locking device according to the first embodiment of the present invention, viewed from various angles.

[0014] Figure 4 These are external views of the lock portion, which is the second component constituting the handle lock device according to the first embodiment of the present invention, viewed from various angles.

[0015] Figure 5 These are perspective views of each stage when the handle locking device according to the first embodiment of the present invention is mounted on a circuit breaker.

[0016] Figure 6 This is a side view showing a state of a circuit breaker in which the handle is locked using the handle locking device according to the first embodiment of the present invention.

[0017] Figure 7 These are external views of a circuit breaker equipped with the handle locking device according to Embodiment 1 of the present invention, as viewed from three directions.

[0018] Figure 8 It is a partial side view of the handle and its surroundings showing the states when the handle lock device according to the first embodiment of the present invention is mounted in the on state and in the off state.

[0019] Description of the label

[0020] 1: Handle locking device,

[0021] 2: handle fixing portion (first component), 2c: cap portion, 2ch: communicating hole, 2e: extension portion, 2fp: pressing surface, 2fv: surface (perpendicular to the surface of the operating rail Ob8 when covered), 2hl: insertion hole, 2p: fitting protrusion, 2w: frame portion,

[0022] 3: Locking portion (second member), 3fh: Opposing surface, 3h: Through hole, 3p: Pin-shaped portion, 3p2: Second pin (second pin-shaped portion), 3t: Plate-shaped portion,

[0023] 7: padlock, 7k: latch, 7m: body,

[0024] 9: Circuit breaker, 9fo: Operation panel, 91: Main body, 92: Power supply side terminal, 93: Load side terminal,

[0025] Ob8: operating track, Xr: rotation axis, α: angle (relative to the rotation center when the handle is laid down). DETAILED DESCRIPTION

[0026] Implementation method 1.

[0027] Figures 1 to 8 The structure of the handle locking device according to the first embodiment of the present invention will be described. Figure 1(a) and (b) are perspective views showing the basic structure of the handle locking device, a circuit breaker to be installed, and the conditions before and after installation, respectively. Figure 2 (a) is an oblique view of the circuit breaker to be installed, and (b) is an enlarged partial side view of the handle surrounding the handle locking device. Figure 3 (a) to (e) are external views of the handle fixing portion as the first component viewed from various angles in order to illustrate the structure of the handle locking device in detail. Figure 4 (a) to (e) are also external views of the locking portion as the second component viewed from various angles in order to show the structure of the handle locking device in detail. Figure 3 and Figure 4 (a) to (c) of (a) to (e) are drawn according to the configuration relationship of the six faces based on triangulation, and (d) and (e) are drawn according to the configuration relationship of the oblique view based thereon.

[0028] in addition, Figure 5 (a) to (d) are perspective views of each stage of installing the handle locking device on the circuit breaker to illustrate the installation method of the handle locking device on the circuit breaker. Figure 6 This is a side view showing the circuit breaker with the handle locked using the handle locking device. Figure 7 The following are the appearance diagrams of the circuit breaker with the handle lock device installed when viewed from three directions ((a): top view, (b): side view, (c): front view). Figure 8 It is a partial side view of the handle and its surroundings showing the state when the handle lock device is installed in the ON state (solid line) and the state when it is installed in the OFF state (dashed line).

[0029] The handle locking device 1 according to the first embodiment is as follows: Figure 1 As shown, the handle locking device 1 covers the manual handle 8 for on / off operation protruding from the opening 9a provided in the operation surface 9fo of the circuit breaker 9, thereby fixing the movement of the handle 8. Before explaining the details of the handle locking device 1, the circuit breaker 9 and the handle 8 to which it is installed will be described.

[0030] Circuit breaker 9 Figure 2As shown, a terminal (power terminal 92) for connecting an unillustrated power supply-side electrical wire is formed at one end (the left side in the figure) of the box-shaped main body 91 in the longitudinal direction, and a terminal (load terminal 93) for connecting an unillustrated load-side electrical wire is formed at the other end (the right side in the figure). Furthermore, the circuit breaker 9 is assumed to be installed relative to a vertical surface such as a wall. In actual installation conditions, the longitudinal direction (the direction connecting the power terminal 92 and the load terminal 93) may be vertical or horizontal. However, in this specification, the longitudinal direction is referred to as the longitudinal direction (y-direction). Furthermore, the handle locking device 1 may be described in accordance with the orientation of the circuit breaker 9 when installed on the circuit breaker 9.

[0031] Furthermore, a handle 8 for manually operating an opening and closing mechanism (not shown) housed within the main body 91 protrudes from an opening 9a provided on one of the surfaces connecting the power terminals 92 and the load terminals 93. The surface from which the handle 8 protrudes is referred to as an operating surface 9fo. Furthermore, the direction perpendicular to the longitudinal direction of the surface parallel to the operating surface 9fo is referred to as the width direction (x direction), and the direction perpendicular to the operating surface 9fo is referred to as the thickness direction (z direction). Furthermore, the surface opposite the operating surface 9fo serves as a mounting surface and, for example, is provided with a groove for mounting on an IEC rail or the like.

[0032] The handle 8 is formed as a thick plate-shaped protrusion 8p having a thickness in the rotation direction and protruding from the opening 9a, and is formed to rotate around a rotation axis Xr parallel to the operating surface 9fo formed inside the main body 91. Moreover, if the protrusion 8p is tilted toward the load terminal 93 side, it is set to be disconnected, and if it is tilted toward the power terminal 92 side, it is set to be connected. As for the tilting angle, basically, the disconnection side and the connection side are each set to the same degree relative to the surface perpendicular to the operating surface 9fo. For example, if the angle of the handle 8 (the protrusion 8p) when tilted toward the connection side relative to the surface perpendicular to the operating surface 9fo and the angle when tilted toward the disconnection side are each set to α, the operating track Ob8 of the handle 8 becomes a fan-shaped having a rotation angle range of 2α.

[0033] The base portion 8b of the handle 8 is arcuately shaped and positioned inward of the opening 9a. When the handle 8 is tilted toward the OFF side, the surface of the arcuate base portion 8b facing the power terminal 92 is exposed from the portion of the roughly rectangular opening 9a facing the power terminal 92. Similarly, when the handle 8 is tilted toward the ON side, the surface of the arcuate base portion 8b facing the load terminal 93 is exposed from the portion of the opening 9a facing the load terminal 93. Meanwhile, near the base 8b of the protruding portion 8p, a through hole 8h is formed that extends perpendicularly to the surface of the operating rail Ob8, i.e., in the width direction. This hole protrudes from the operating surface 9fo regardless of which side the handle is tilted. Furthermore, the distal end of the protruding portion 8p also has a recessed portion 8c that is not through-hole-shaped but rather recessed in the width direction.

[0034] Furthermore, a substantially rectangular region Ape including the handle 8 in the operation surface 9fo indicates a range exposed from an opening (panel cutout) of the panel when the circuit breaker 9 is covered by the panel.

[0035] <Handle lock device>

[0036] For the handle 8 of the circuit breaker 9 constructed as described above, the handle locking device 1 involved in this embodiment is as follows: Figure 1 The illustrated embodiment is composed of two parts: a handle fixing portion 2 (first part) that covers the handle 8 and restricts its movement, and a locking portion 3 (second part) that is locked with a padlock 7 to prevent the handle fixing portion 2 from being separated from the handle 8 .

[0037] The handle fixing portion 2 is as follows Figure 3 As shown, the opening 9a is formed into a frame shape, and a cap 2c that covers the handle 8 (the protruding portion 8p) is formed on one end side of the frame-shaped portion 2w having a pressing surface 2fp for pressing the operating surface 9fo. The inner surface of the cap 2c is formed so as to tilt from the middle portion toward one end side as it separates from the pressing surface 2fp, matching the angle when the handle 8 is tilted to one side for connection or disconnection. That is, the angle relative to the pressing surface 2fp is set to be the same as the angle α of the handle 8 relative to the operating surface 9fo. Moreover, the size of the inner surface of the cap 2c is adjusted to a degree that it does not shake relative to the outer peripheral surface of the protruding portion 8p.

[0038] In addition, the front end of the cap 2c does not cover the front end of the handle 8, but is open to expose the covered front end of the handle 8. In addition, the front end of the cap 2c is formed with extensions 2x extending from both sides in the width direction to provide a grip when detached from the handle 8.

[0039] Furthermore, fitting protrusions 2p are formed on the two inner side surfaces of the other end side of the frame-shaped portion 2w. These protrudes beyond the pressing surface 2fp. When the cap portion 2c is fitted into the handle 8, the inner side surface and the longitudinal end surface of the opening 9a fit together.

[0040] With the cap portion 2c and pressing surface 2fp described above, if the handle fixing portion 2 is wrapped around the handle 8 that is tilted to one side, the pressing surface 2fp will abut against the operating surface 9fo. Therefore, even if the handle 8 is operated, it will only move to the middle position and will not be tilted to the opposite side. Furthermore, if the fitting protrusion 2p is provided, the fitting protrusion 2p abuts against the inner end surface on the opposite side of the opening 9a, so the handle fixing portion 2 itself cannot be moved in the longitudinal direction.

[0041] For example, if the handle fixing portion 2 is covered on the handle 8 that is tilted toward the connection side, the pressing surface 2fp and the interlocking protrusion 2p will abut against the operating surface 9fo and the inner circumferential surface of the opening 9a, so that the handle 8 cannot be operated and tilted toward the disconnection side. Similarly, if the handle fixing portion 2 is covered on the handle 8 that is tilted toward the disconnection side, the handle 8 cannot be operated and tilted toward the connection side unless the handle fixing portion 2 is removed. In other words, the operation of the handle 8 can be restricted only by the handle fixing portion 2 as the first component. However, in order to prevent intentional handle operation by removing the handle fixing portion 2, the locking portion 3 and the padlock 7 are used, and therefore the following specifications are also provided.

[0042] It is formed with a connecting hole 2ch that is connected to the through hole 8h of the protruding portion 8p and an insertion hole 2hl for the latch 7k of the padlock 7 to pass through. The connecting hole 2ch is continuously opened on the side surface of the frame-shaped portion 2w and one of the surfaces of the cap 2c in a manner that is connected to the through hole 8h and also connected to the recessed portion 8c. The insertion hole 2hl extends from the other end side of the frame-shaped portion 2w toward the middle part in a manner separated from the pressing surface 2fp, and is formed in the center of the width direction of the extension portion 2e having a surface 2fv perpendicular to the surface of the operating rail Ob8 (when installed). As a result, the insertion hole 2hl penetrates in a direction parallel to the surface of the operating rail Ob8 of the handle 8 and is arranged at a position inside the range of motion of the handle 8. In addition, the extension portion 2e is formed to be parallel to the penetration angle (α) of the cap 2c, so that the mold structure during molding becomes easier.

[0043] On the other hand, the locking portion 3 is opposed to the surface 2fv of the extension portion 8e, as shown in FIG. Figure 4As shown, the plate-shaped portion 3t has a facing surface 3fh perpendicular to the operating rail Ob8 plane (when installed), that is, parallel to the width direction of the circuit breaker 9; and a pin-shaped portion 3p, which is inserted through the through-hole 8h of the protruding portion 8p. A through-hole 3h is formed in the center of the width direction of the plate-shaped portion 3t for the latch 7k to pass through. Furthermore, a second pin 3p2 is formed, parallel to the pin-shaped portion 3p, corresponding to the recess 8c. The pin-shaped portion 3p, the second pin 3p2, and (the facing surface 3fh of) the plate-shaped portion 3t are parallel and extend in the same direction from different locations on the side wall 3s. A first abutment surface 3f1 is formed just in front of the portion of the side wall 3s where the second pin 3p2 is formed, which abuts one lower surface of the extension 2x. A second abutment surface 3f2 is formed in the portion of the plate-shaped portion 3t separated from the side wall 3s, which abuts the other upper surface of the extension 2x.

[0044] Next, use Figure 5 A method of locking the operation of the handle 8 of the circuit breaker 9 by combining the handle fixing portion 2 and the locking portion 3 will be described.

[0045] First, the cap portion 2c of the handle fixing portion 2 is covered on the handle 8 which is tilted toward one side of the on / off state (in the Figure 5 (a) is the on side), the pressing surface 2fp is pressed in until it contacts the operating surface 9fo. At this time, the connecting hole 2ch of the handle fixing portion 2 and the through hole 8h of the protruding portion 8p of the handle 8 overlap. In addition, the connecting hole 2ch is also connected to the recessed portion 8c ( Figure 5 (b)).

[0046] Next, the locking portion 3 is moved relative to the handle fixing portion 2 in the width direction (arrow) and inserted ( Figure 5 (c)). At this time, if Figure 3 、 Figure 4 As described in the foregoing, the locking portion 3 is inserted from the side of the handle fixing portion 2, with the opposing surface 3fh of the plate-shaped portion 3t aligned with the surface 2fv of the extension portion 8e of the handle fixing portion 2, the pin-shaped portion 3p inserted into the through-hole 8h of the handle 8, and the second pin 3p2 inserted into the recess 8c. Specifically, the locking portion 3 is inserted from the side of the handle fixing portion 2 by moving the locking portion 3 in a direction parallel to the surface of the operating rail Ob8 relative to the circuit breaker 9. This allows the locking portion 3 to be continuously inserted relative to the covered handle fixing portion 2 in a direction perpendicular to the operating rail Ob8.

[0047] So, if Figure 5 As shown in (d), the through hole 3h formed in the plate-like portion 3t and the insertion hole 2hl formed in the extension portion 2e of the handle fixing portion 2 overlap. Therefore, the latch 7k of the padlock 7 is passed through the overlapping through hole 3h and the insertion hole 2hl. Figure 6As shown, if the latch 7k of the padlock 7 is fixed (locked) to the main body 7m, the plate-shaped portion 3t of the locking portion 3 is fixed relative to the extension portion 8e of the handle fixing portion 2, and the pin-shaped portion 3p ( Figure 4 ) is embedded in the through hole 8h of the handle 8, so the locking portion 3 cannot be removed from the handle fixing portion 2. In addition, the locking portion 3 is more firmly fixed to the handle fixing portion 2 due to the contact between one lower surface of the extension portion 2x formed on both sides in the width direction and the first abutment surface 3f1, and the contact between the other upper surface and the second abutment surface.

[0048] As described above, when the locking portion 3 is secured to the handle fixing portion via the padlock 7, the engagement of the pin-shaped portion 3p with the communicating hole 2ch and the hooking of the insertion hole 2hl with the through-hole 3h prevent the handle fixing portion 2 from being removed from the handle 8. In other words, handle operation is impossible. In this case, by providing the second pin 3p2 that engages with the recess 8c, the pin-shaped portion 3p is prevented from accidentally engaging with the recess 8c. When the cap 2c is attached to the handle 8, it can first be inserted into the through-hole 8h of the handle 8.

[0049] At this time, the insertion hole 2hl through which the latch 7k of the padlock 7 passes is formed in the extension portion 2e extending from the side (the other end) opposite to the side (one end) where the handle 8 is laid down toward the middle portion, and the same through-hole 3h is formed in the plate-shaped portion 3t along the surface of the one end side of the extension portion 2e. That is, the holes (insertion hole 2hl, through-hole 3h) through which the latch 7k of the padlock 7 passes are as follows: Figure 7 As shown, the latch 7k is arranged to extend longitudinally (in the y direction) inside the operating rail Ob8 when the handle 8 is operated and to extend parallel to the surface of the operating rail Ob8. In addition, the opening of the hole (insertion hole 2h1, through-hole 3h) through which the latch 7k passes is located in the width direction (x direction), that is, at the center line of the operating rail Ob8 when the handle 8 is operated.

[0050] Therefore, when locked, the latch 7k and body 7m of the padlock 7 are contained within the area Ape exposed from the panel cutout. Furthermore, by being open enough to expose the front end of the cap 2c without covering it, the handle 8 is positioned close to the base of the panel when it is opened or closed. Even when the panel cutout's trajectory is tilted more than the perpendicular to the operating surface 9fo, it can be contained within a range Apt that avoids its trajectory. As a result, the panel can be opened and closed while locked, regardless of the position of the circuit breaker 9 within the panel. In other words, the panel can be opened and closed for inspection, maintenance, etc., even when the handle cannot be operated.

[0051] That is, the hole for the latch 7k to pass through is provided at the center side of the operating rail Ob8 from the side where the handle is laid down in the longitudinal direction, and is arranged so as to be on the center line of the handle 8 in the width direction, so that the extension of the padlock 7 from the handle 8 can be suppressed to a minimum. Figure 8 As shown, even when the handle 8 is tilted toward the ON side or the OFF side, the extension of the padlock 7 from the handle 8 can be suppressed to a minimum.

[0052] In particular, if the upper end surface (the surface opposite to the operating surface 1fo) of the hole (insertion hole 2hl, through-hole 3h) through which the latch 7k passes is within the range of ±5 mm relative to the surface perpendicular to the operating surface 1fo through which the rotation axis Xr of the handle 8 passes, the effect will be more reliably manifested.

[0053] In addition, the dimensions of the inner surface of the cap portion 2c are exemplified as not shaking to the outer peripheral surface of the protrusion 8p, and preferably fit closely. Furthermore, the handle fixing portion 2 can be constructed to be smaller than the outer dimensions of the protrusion 8p, so that the handle fixing portion 2 is pressed relative to the handle 8. In this case, the handle fixing portion 2 will not fall off the circuit breaker 9 before the locking portion 3 is covered, and the locking operation relative to multiple circuit breakers becomes easy. At this time, the resin material of the handle locking device 1 can be a material with a lower hardness than the material constituting the protrusion 8p. In addition, the handle locking device 1 is set to a conspicuous color such as red or yellow, so that it is known that the circuit breaker 9 is not normally operated.

[0054] In addition, in this embodiment, the circuit breaker 9 is described as the target, but it is not limited to this. It can also target leakage circuit breakers and switches that only open and close, and is called a "switch handle lock device" including circuit breakers and leakage circuit breakers.

[0055] As described above, according to the switch handle locking device 1 involved in embodiment 1 of the present invention, the handle locking device 1 for fixing the handle 8 for on / off operation protruding from the opening 9a provided on the operating surface 9fo of the switch (circuit breaker 9) comprises: a handle fixing portion 2 as a first component and a locking portion 3 as a second component, the handle fixing portion 2 being configured to include: a frame-shaped portion 2w which surrounds the opening 9a and has a pressing surface 2fp for pressing the operating surface 9fo; a cap portion 2c which is provided in the frame One end of the pressing surface 2fp side of the frame-shaped portion 2w is open and is formed into a concave shape to match the angle α of the handle 8 that is tilted toward one side of the connection or disconnection; and an extension portion 2e, which extends obliquely from the other end of the frame-shaped portion 2w toward one end in a manner separated from the pressing surface 2fp, and is formed with an insertion hole 2hl that passes through the surface parallel to the operating track Ob8 of the handle 8. The cap portion 2c is covered on the handle 8 by movement in a direction parallel to the surface of the operating track Ob8. The locking portion 3 is constructed to have: a plate-shaped portion 3t, which has a vertical The opposite surface 3fh is perpendicular to the surface 2fv of the operating track Ob8 formed on one end side of the extension portion 2e, and is formed with a through hole 3h; and a pin-shaped portion 3p, which extends in a direction parallel to the opposite surface 3fh and the pressing surface 2fp when the opposite surface 3fh is opposite to the surface 2fv of the extension portion 2e, and is assembled to the covered circuit breaker 9 by moving in a direction perpendicular to the surface of the operating track Ob8. The cap portion 2c of the handle fixing portion 2 is provided with a connecting hole 2ch, which is provided when it is covered with the handle 8. , communicating with a through-hole 8h formed in the handle 8 and extending perpendicularly to the surface of the operating rail Ob8. When the locking portion 3 is assembled to the circuit breaker 9 covered with the handle fixing portion 2, the pin-shaped portion 3p is inserted into the through-hole 8h via the communicating hole 2ch. Furthermore, the through-hole 3h is connected to the insertion hole 2hl. As a result, the hole through which the latch 7k passes (through-hole 3h, insertion hole 2hl) is located inside the operating rail Ob8 of the handle 8, allowing the padlock 7 to be accommodated in a position closest to the operating range of the handle 8 on the operating surface 9fo. As a result, even when multiple switches are arranged in close proximity, the padlock 7 does not interfere with adjacent switches. Furthermore, even when a panel is used, the padlock 7 does not protrude from the panel cutout, allowing the panel to be opened and closed while locked.

[0056] In particular, when the cap portion 2c is covered on the handle 8, if the insertion hole 2hl of the extension portion 2e is opened in a manner that is located in the center part of the handle 8 in a direction perpendicular to the surface of the operating rail Ob8, the padlock 7 is located in the center of the width direction of the switch, so that interference with adjacent instruments on either side can be minimized.

[0057] Furthermore, when the locking portion 3 is installed in the circuit breaker 9 covered with the handle fixing portion 2, if the insertion hole 2hl of the extension portion 2e and the through hole 3h of the plate-like portion 3t are arranged to be located within a range of ±5 mm from a plane perpendicular to the operating surface 9fo including the rotation axis Xr of the handle 8 in a direction parallel to the operating track Ob8 surface and the operating surface 9fo of the handle 8, then even when the handle locking device 1 is assembled with the handle 8 in a state of being tilted toward one side of the on / off state, interference with the above-mentioned adjacent instruments and interference with the panel can be prevented.

[0058] Furthermore, if the extension portion 2e is formed to be parallel to the angle of the cap portion 2h combined with the handle 8, the mold can be easily constructed, thereby improving productivity.

[0059] In addition, if the locking portion 2 has a recessed portion 8c that is recessed in a direction perpendicular to the surface of the operating rail Ob8 formed on the handle 8 at a position different from the through hole 8h, and has a second pin-shaped portion (second pin 3p2) formed in an interlocking manner, it is possible to prevent the handle fixing portion 2 from being assembled in a state where the half end is covered by the handle 8 in the middle, thereby improving the reliability of the locking.

[0060] Furthermore, the cap 2c is formed so that the front end portion of the handle 8 is open when it is covered with the handle 8, and the cap 2c does not need to protrude above the height of the handle 8. Therefore, for example, by being arranged in front of the opening and closing mechanism portion of the panel, the curvature radius of the arc-shaped trajectory centered on the opening and closing mechanism portion becomes smaller, thereby enabling the panel to be opened and closed in a locked state even with a switch having a large inclination relative to the perpendicular line of the operating surface 9fo.

Claims

1. A handle locking device for a switch, which fixes a handle for on / off operation protruding from an opening provided on an operating surface of the switch, The feature of the handle locking device for the switch is that having a first component and a second component, The first component comprises: a frame-shaped portion, which surrounds the opening and has a pressing surface for pressing the operating surface; a cap portion, which is open at one end of the pressing surface side of the frame-shaped portion and is formed into a concave shape to match the angle of the handle that is tilted toward one side of the connection and disconnection; and an extension portion, which extends from the other end of the frame-shaped portion toward the one end in a manner that separates from the pressing surface and forms an insertion hole that penetrates parallel to the operating track surface of the handle. The first component is configured to cover the cap portion on the handle by moving in a direction parallel to the operating track surface. The second component comprises: a plate-shaped portion having an opposing surface which is perpendicular to the operating track surface formed on the one end side of the extension portion and is formed with a through hole; and a pin-shaped portion which extends in a direction parallel to the opposing surface and the pressing surface when the opposing surface is opposed to the surface of the extension portion, and the second component is configured to assemble the first component to the covered shutter by moving in a direction perpendicular to the operating track surface. The cap portion of the first component is provided with a communication hole, which, when covered on the handle, communicates with a through hole formed on the handle and penetrating in a direction perpendicular to the operating track surface. When the second member is assembled to the shutter covered with the first member, the pin-shaped portion is fitted into the through hole via the communicating hole, and the through hole is communicated with the insertion hole.

2. The handle locking device for a switch according to claim 1, characterized in that: The insertion hole of the extension portion opens in a direction perpendicular to the operation rail surface so as to be located at a center portion of the handle when the cap portion is covered on the handle.

3. The handle locking device for a switch according to claim 1, characterized in that: The insertion hole of the extension portion and the through hole of the plate-shaped portion are arranged to be located within a range of ±5 mm from a plane perpendicular to the operating surface including the rotation axis of the handle in a direction parallel to the operating track surface and the operating surface of the handle when the second component is installed into the switch covered with the first component.

4. The handle locking device for a switch according to claim 2, characterized in that: The insertion hole of the extension portion and the through hole of the plate-shaped portion are arranged to be located within a range of ±5 mm from a plane perpendicular to the operating surface including the rotation axis of the handle in a direction parallel to the operating track surface and the operating surface of the handle when the second component is installed into the switch covered with the first component.

5. The handle locking device for a switch according to any one of claims 1 to 4, characterized in that: The extension portion is formed to be parallel to an angle of the cap portion combined with the handle.

6. The handle locking device for a switch according to claim 1, characterized in that: The second member has a second pin-shaped portion formed to fit in a recessed portion that is recessed in a direction perpendicular to the operation rail surface formed at a position of the handle different from the through hole.

7. The handle locking device for a switch according to claim 2, characterized in that: The second member has a second pin-shaped portion formed to fit in a recessed portion that is recessed in a direction perpendicular to the operation rail surface formed at a position of the handle different from the through hole.

8. The handle locking device for a switch according to claim 3, characterized in that: The second member has a second pin-shaped portion formed to fit in a recessed portion that is recessed in a direction perpendicular to the operation rail surface formed at a position of the handle different from the through hole.

9. The handle locking device for a switch according to claim 4, characterized in that: The second member has a second pin-shaped portion formed to fit in a recessed portion that is recessed in a direction perpendicular to the operation rail surface formed at a position of the handle different from the through hole.

10. The handle locking device for a switch according to claim 5, characterized in that: The second member has a second pin-shaped portion formed to fit in a recessed portion that is recessed in a direction perpendicular to the operation rail surface formed at a position of the handle different from the through hole.

11. The handle locking device for a switch according to any one of claims 1 to 4 and 6 to 10, characterized in that: The cap is formed so that the front end portion of the handle is open when the cap is covered with the handle.

12. The handle locking device for a switch according to claim 5, characterized in that: The cap is formed so that the front end portion of the handle is open when the cap is covered with the handle.

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