JPH03280314A - Operational handle locking device - Google Patents

Abstract

PURPOSE:To facilitate handling by providing a hooking member for preventing the disengagement of a protruded part that is elastically deformed and hooked on a case at the time of inserting a locking member into a locking hole, from an engaging member, on a lock cover. CONSTITUTION:A lock cover 21 is installed on a handle part 5 of an operational handle 3 from one side of the handle part 5, and the inside of a patch 7 is abutted on the handle part in the front and rear surfaces 5b, 5c, while a protruded part 10 is fitted to a round hole 5d, and an engaging member 12 is engaged with the handle part 5 in an integrated from in such a way that it cannot be turned in any direction. An abutted surface 22a of a supporting plate is restricted so as not to operate the operational handle 3, under a condition that it abuts on the upper surface of a case 1. In this state, a hooking part 24c is situated higher than the upper surface of the case 1, and is not hooked on the case 1. When locking is to be carried out, an intersection 24b of a hooking member and a hooking part 24c are lowered, and an arm 15a of a padlock is inserted into a locking hole 23 in such a way that the intersection 24b and the locking hole 23 are not interfered with each other, and the locking is thus completed. A hooking part 24 in the form of an overhung arm is lowered by the arm 15a, and the hooking part 24c is hooked on an inner wall 2a of an opening part 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an operating handle locking device used to prohibit the operation of an operating handle of a circuit breaker.

[Conventional technology]

Conventionally, an operation handle locking device of type 4 has been used, for example, in a circuit breaker, and is disclosed in Japanese Patent Application Laid-Open No. 62-271320. Figures 24 to 28 show this operation handle locking device, and Figure 24 shows the lock cover (6) attached to a single-pole no-fuse circuit breaker (hereinafter referred to as N).
Fig. 25 is a perspective view showing the lock cover (6) viewed from the opposite side, Fig. 26 is a perspective view illustrating how it is attached from the side to the knob [51] of the operating handle of the NFB. The padlock (14) is attached to the attached lock cover (6).
27 is a vertical cross-sectional view of the operation handle section showing the locked state using the locking member (26. 28 is a cross-sectional view taken along the cut plane xx■-xx■ in the figure, and a plan view showing the state in which the lock cover (6) is attached to the NFB. In these figures, (1) shows the opening and closing of the single-pole NFB. A case (2) houses a mechanism (not shown), and a case (1)
), (2a) is a rectangular opening provided in (
2) inner wall, (3) open/close I! It is an operation handle that operates on the side, and the shaft (4J (Fig. 26))
It is rotatably supported by the opening (2) and has a knob (51) which is a protruding part provided to protrude from the opening (2); There are square holes (5a
) is provided.

(5b), (5c) are the front and rear surfaces of the knob +51, (
Reference numeral 6) denotes a lock cover that is attached to the knob portion (5) from the side, and is constructed as follows and is manufactured from an integrally molded piece of elastic plastic. ■The knob part (
It is a U-shaped contact plate that engages with the lock cover (6).
When attached to the knob part [51], the inner surface of the contact plate (2) comes into contact with the front and rear surfaces (5b) and (5c) of the knob part (5). (81 is a connecting plate that connects the sides of the U-shaped contact plate (7) and is a side abutting part that comes into contact with one side of the clamping part (9) when attached to the knob part (4). 9) is a support plate that is an extending member extending from the contact plate ■ and the connecting plate (to) in the rotating direction of the knob (51), and (9a) is a support plate that is an abutting member that comes into contact with the case. contact surface, (10)
is a square prism-shaped protrusion that is provided on the connecting plate and is fitted into the hole (5a), and the engagement member (12) is connected between the contact plate ■, the connecting plate, and the protrusion side. It consists of (13
) is a hook member provided by cutting out a part of the support plate (9), and has one end fixed to the support plate (9) and a hook portion (13a) at the other end. The latching portion (13a) normally protrudes downward from the contact surface (9a) (Fig. 26,
(See FIG. 27), the hook member (13) is elastically deformed so that the hook portion (13a) can move upward by a dimension A in FIG. 27 (details will be described later). (14) is the hook part (13
a> on the notch part of the support plate (9), and has a gap size B (27th
This is a bridge-like protrusion having a shape (Fig.).

When the lock cover (6) configured as described above is used to restrain the operating handle (3) of the circuit breaker in the "closed" position, for example, the engaging member (12) is opened as shown in FIG. By pointing the part toward the side of the knob part (5) and pushing in the direction of arrow X, it is attached to the operating handle β) from the side.

At this time, the hole (5a) of the knob part and the protrusion part (10) fit together, and the knob part (front and rear surfaces (5b) of the handle,
(5c) comes into contact with the inner surface of the contact plate (7) and the engaging member (12
) and the knob part (9) are integrally engaged so as not to rotate.On the other hand, during the installation of the lock cover (6), the hook part (13a) is pushed up by the upper surface of the case (1), as shown in FIG. It is pushed in while being elastically displaced by the dimension A shown in , and when installation is completed, it fits into the opening (2) and is latched onto the inner wall (2a), and is pulled out in the opposite direction of arrow X. is blocked.In this state, the operation handle O)
Even if an attempt is made to rotate the support plate, the contact surface (9a) of the support plate is in contact with the case (1), so the rotation operation is blocked.

To remove the lock cover (6), pull it in the opposite direction of arrow ” position, use the lock cover (
6) left and right, and place it on the opposite side of the knob (c) (24th
Attach from the opposite side (in the illustration) to the front.

As described above, by attaching the lock cover 16) to the knob part (9) of the operating handle, operation of the operating handle (3) can be prevented, but a case where the lock is further locked will be described. While being attached to the knob part (9), the hook part (13a) is pushed upward by the dimension A in FIG. 27, and the gap dimension with the bridge-shaped projection part (14) decreases from B to C. Therefore, After the lock cover (6) is attached to the knob part (9 (at this time, it has returned to dimension B)), the arm part (15a) of the padlock (15), which is a locking member with a diameter larger than dimension C, between the hook part (13a) and the bridge-like protrusion (14) (dimension B
) and lock the padlock (15), the lock cover (6) is latched by the eye latching part (13a) that does not remove the padlock (15).
cannot be removed, it is possible to prohibit unauthorized operation of the operating handle (3) by anyone other than the administrator, and the function of the handle locking device becomes more complete.

[Problem to be solved by the invention]

Since the conventional operation handle locking device is constructed as described above, the lock cover (6) is attached to the grip portion (5).
- When detaching from the opening, a force must be applied in the direction opposite to the arrow This made the separation work difficult.

In addition, the engagement between the hole (5a) of the knob and the protrusion (10) is shallow, and even when the lock is locked, if a slightly large force is applied to the contact plate ω in the direction of the arrow Y in Fig. 11, the rotation moment will cause the contact plate ( 7) and the protrusion (10) are elastically deformed to form the hook (13).
a) There is a problem that the protrusion (lO) easily rotates as shown by the arrow y using the abutment part (2c) with the inner wall (2a) of the k opening as a fulcrum and comes off, making the locking effect less reliable. there were.

This invention was made in order to solve the above-mentioned problems, and aims to provide an operation handle locking device equipped with a lock cover that can be easily attached and detached without requiring any force and that is convenient to handle. purpose.

Further, to obtain an operating handle locking device having a lock cover that is firmly latched to the operating handle and does not easily become unlatched even when force is applied from the loading/unloading direction, and has high locking reliability. With the goal.

Furthermore, it can be easily attached and detached without requiring any force, and it is firmly latched onto the operating handle, so the latching does not come off even if force is applied from the loading/unloading direction, and the locking reliability is high. To obtain an operating handle locking device equipped with a lock cover that is less susceptible to damage, has excellent handling properties, and can prevent intentional release of a locked state.

[Means to solve the problem]

The operating handle locking device according to the present invention includes a lock cover that is attached to an operating handle that is rotated from one side and restricts the operation, in which the lock cover is attached to a protrusion of the operating handle that does not rotate. an extending member that has a locking hole into which a locking member that prohibits removal of the lock cover is inserted; and a fixed part fixed to the engaging member that forms a cantilever arm in the direction of rotation operation. The hook is provided so that it can be extended and elastically deformed so that when the locking member is inserted into the locking hole, the hook is elastically deformed and is hooked to the case to prevent the protrusion from disengaging from the engagement member. A stop member is provided.

Further, the lock cover is provided with a cantilever arm extending from the engaging member, the extending member, and a fixed part fixed to the extending member toward the protruding part so as to be elastically deformable, and locked in the locking hole. A latching member is provided that is elastically deformed when the member is inserted and is latched to the other side of the protrusion to prevent the protrusion from disengaging from the engagement member. .

Furthermore, when the locking member is inserted into the locking hole between the extension member and the side member, it is elastically deformed and latched to the other side of the protrusion, thereby preventing the engagement between the protrusion and the engagement member. A latching member that prevents the latching member from coming off is provided in the shape of a cantilevered arm so that it can be elastically deformed.

[For production]

In this invention, the lock cover is attached from one side of the operating handle, and the engaging member engages with the protrusion of the operating handle to prevent it from rotating, and the abutting member abuts the case to prevent the engaging member from rotating. When the locking member is not inserted into the locking hole of the extension member, the lock cover is not latched to either the case or the protrusion, so the lock cover can be easily installed without applying large force. When the locking member is inserted and the locking member is inserted, the locking member elastically deforms and is latched to the case, restricting movement of the lock cover in the mounting/detaching direction and preventing the engagement between the protrusion and the engaging member. prevent it from coming off.

Further, the lock cover is attached from one side of the operating handle, and the engaging portion is engaged with the protrusion of the operating handle so as not to rotate, and the abutting member is brought into contact with the case to prevent operation of the operating handle. When the locking member is not inserted into the locking hole of the extension member, the lock cover is not latched to either the case or the protrusion, so the lock cover can be easily attached and removed without applying much force. When the locking member is inserted through the lock, the latching member is elastically deformed and latched onto the other side of the protrusion, and the lock cover is mounted by sandwiching the protrusion from both sides with the side abutting part. To surely prevent disengagement between a protruding part and an engaging part by restricting movement in the disengaging direction.

Furthermore, since the latching member is provided between the extending member and the side member, there is no risk of deforming or damaging the latching member by intentionally or carelessly touching the latching member. It is reliable and easy to handle.

〔Example〕

1 to 4 show an embodiment of the present invention, in which FIGS. 1(a) and 4(b) are a perspective view and a sectional view of the operating handle, FIG. 2 is a perspective view of the lock cover, Figure 3 is a side view showing the lock cover attached to the knob of the operating handle (before locking), and Figures 4 (a) and (b) show the lock cover attached and padlocked. They are a plan view and a side view, respectively.

In these figures, (5d) is a round hole that is a fitting part provided in the knob part (51) of the operation handle, and is the 24th round hole.
(21) is a lock cover that is attached from the side to the knob (9), which has the same function as the square hole (5a) in the conventional example shown in the figure, and is made of elastic plastic. Manufactured from a one-piece molded product.

(22) is a support plate which is an extending member, and the engagement member (1
It extends from the side edge of the connecting plate (2) to the front side in the rotational direction of the knob (51), that is, to the right in the figure, and connects the case (1).
It has an abutting surface (22a) which is an abutting member that comes into contact with the arm part (15a) of a padlock, for example, on the lower right side of the vertical part of the abutting surface (22a).
A locking hole (23) (see FIG. 4(b)) is provided through which the locking hole (23) is inserted. (24) is a hanging member, and the contact plate (
Fixed part (24a) at the lower end of the short side on the front side of 7)
The knob portion (51) is extended as shown in the figure to be elastically deformable in the shape of a cantilevered arm, and near the right end there is an intersection portion (24b) that intersects with the locking hole (23) and a semi-cylindrical shape. It has a hook part (24c).

The rest of the configuration is similar to the conventional example shown in FIG. 25, so corresponding parts are given the same reference numerals and explanations will be omitted. In this case, one side of the U-shaped contact plate m on the near side is made slightly shorter, and the shape of the protrusion (10) is adjusted to match the shape of the hole (5d) of the knob (5) in Fig. 1. It is shaped like a round bar.

Note that the hook portion (24c) is normally located above the contact surface (22a) of the support plate (22), as shown in FIG. Further, the locking member (24) is elastically deformed so that the intersection portion (24b) moves below the locking hole (23) so that the arm portion (i5a) of the padlock can be inserted into the locking hole (23). has been done.

The mouth/ink cover (21) configured as described above can be used, for example, in the direction of arrow Z in FIGS. 1 and 2, that is, the knob (
5) is attached to the knob (51) of the operating handle from one side, and as shown in FIG.
The inside of the plate opening contacts the rear surface (5bL (5c), and the protrusion (10) is fitted into the round hole (5d), so that the engaging member (12) is attached to the knob (5) in either direction. At the same time, the contact surface (22a) of the support plate contacts the top surface of the case (1) and restrains the operation handle (3) so that it cannot be operated. In this state, the locking part (24c) is above the top surface of the case (1) as shown in Fig. 3 and is not hooked to the case (1). If you want to lock the lock to prevent it from coming off and operating the operating handle, push down the intersecting part (24b) and the intersecting part (24c) of the latch member, as shown in FIG. The arm part (15a) of the padlock is inserted into the locking hole (23) and locked so that the part (24b) and the locking hole (23) do not interfere with each other. The lock cover (24) is pushed down by the arm part (15a) of the padlock and the latch part (24C1) is hooked to the inner wall (2a) of the opening ■ of the case.
1) cannot be removed even if force is applied in the direction opposite to arrow 2 in Figs. 1 and 2. To remove the lock cover (21) from the knob of the operating handle ) from the locking hole (23), the latch member (2
4) returns to its original state due to its elasticity, that is, as shown in FIG. This can be easily done by applying a slight force in the direction opposite to the arrow Z in FIG. 2 against the frictional force between the knob (9) and the engaging member (12).

Figures 5(a) and 5(b) further show other embodiments of the present invention (Figure aJ is a perspective view of the lock cover (31), and Figure 5(b) is a perspective view of the lock cover (31), and Figure 5(b) shows the state in which it is attached to the knob. 2 is a side view showing the lock cover in the embodiment shown in FIG.
5) In order to increase the frictional force between the engagement part (!2) and the engagement part (!2) when locking, and to make it difficult for the engagement to come off, the semi-cylindrical protrusion (32) is attached to the abutting plate m of the latching member (24). The intersecting part (24b) of the locking member is provided near the arm part (1) of the padlock.
When the rear surface of the knob (5a) is pressed down,
The lower part of c) is pressed.

FIG. 6(a) is a perspective view showing another embodiment of the present invention, and the lock cover (41) has a width of the contact plate (7) as shown in the embodiment of FIG. The side members (
42). The side member (42) is provided in the form of a plate with a thickness t extending to the right from the front side of the plate opening as shown in the figure, and has a notch (42a) through which the arm portion (15a) of the locking member can pass. ) and a case abutting part (42b) which is an abutting member that abuts the case (1) at the right end. (431 is the right end of the support plate (22) and the side member (42)
) is a reinforcing plate that connects the right end portions of the side members (42) and reinforces the side members (42).

Lock cover (4I) configured as shown in Figure 6(a)
is the same as the lock cover (21) in Figure 2.
5) from the side, and the locking hole (23) and notch (
The arm portion <15a) of the locking member is inserted into 42a) and locked, and the hooking portion (24c) of the hooking member (24) is hooked and engaged with the inner wall (2a) of the opening of the case (1). Element(
! 2) to prevent the knob from disengaging. In this state, the notch (42a) is attached to the arm portion (15a>
The movement of the latching portion (24c) is restricted to stabilize the latching of the latching portion (24c) to the inner wall (2a). The hanging member (24) is the support plate (22)
, the reinforcing plate (43), and the side member (42), so the latching member (24) cannot be touched from the outside, and the latching member (24) may be intentionally moved to cause damage to the inner wall of the opening of the case. (2
Even if you try to unlatch it from a), you can't, so the lock becomes even more secure. In addition, the hanging member (24) is attached to the support plate (24).
2) and the side portion G11l (42) and are protected, there is no risk of the locking member (24) being accidentally broken during handling.

FIG. 7 is a perspective view showing a lock cover (51) which is another embodiment of the present invention, and in the figure, (52)
is a side member, and is a vertical member (52a) provided in the vertical direction facing the support plate (22) with the hooking member (24) interposed therebetween.
and a case contacting part (52b) that contacts the case (1), and as shown in the figure, the lower right end of the contact plate (7) and the reinforcing plate (
43) is integrated with.

Figures 8 to 1O show other embodiments of the present invention, in which Figure 8 is a perspective view of the lock cover, Figure 9 is a side view of the lock cover, and Figure 10 (a) shows the lock cover. Fig. 1θ (b) is a side view showing the state in which the padlock is attached to the knob (5) of the operation handle (before locking), and Fig. 1θ (b) is a side view showing the state in which the arm of the padlock is inserted into the locking hole and locked. In these figures, (61) is a lock cover that is attached to the knob (9) from the side, and is configured as follows.
) A hole (7a) is provided on the top surface of the knob (c) so that the rated current value written on the back side of the knob (c) can be read. In front of the right side of the support plate (7), extend it in an L shape and attach a support plate (
22), and an intersection part (62b) extending from a fixed part (62a) fixed to the right front end of the support plate (22) toward the stop plate (7) and intersecting the locking hole (23). A latching member (62) having a latching portion (62c) is provided in the shape of a cantilever arm.

As shown in FIG. 9, the latching portion (62c) is always located to the right of the inner surface of the plate (2). Furthermore, when the latching part (62c) is pushed down, the latching member (62) is elastically deformed, the intersection part (62b) moves downward, and the arm part (15a) of the padlock is inserted into the locking hole (23). At the same time, after the arm part (15a) of the padlock is inserted, the intersection part (62b) is pushed down by the arm part (15a), and the latch part (62c) is pushed down to the grip part ((5 ).

The lock cover (61) configured as described above is the 10th
The engaging member (12) is attached to the knob (9) from the opposite side of the figure to the front, and the operating handle (3) is restrained from being operated.In this state, the lock cover (61) is Since it is not latched to either the case (1) or the knob (5) of the operating handle, the lock cover (6) can be attached or removed without resisting the frictional force between the knob 4 and the engaging member (12). This can be easily done by applying a small amount of force. Furthermore, when locking the lock cover (61) so that it cannot be removed, push down the latch part (62c) so that the intersecting part (62b) does not interfere with the locking hole <23) and insert a padlock into the locking hole (23). arm part (1
5a) and lock it, the latch member (62
) is elastically deformed and the hooking portion (62c) moves downward as shown in FIG. (By sandwiching (5) from both sides between the connecting plate (toward) and the hooking part (62c) (see Fig. 10(b)), the lock cover (61)
It is prohibited to leave.

FIG. 11 further shows another embodiment of the present invention,
A lock cover with small projections (72) on the inner surface of the back plate
71), when the lock cover (71) is attached to the knob part (5), the elastic deformation of the contact plate (7) is slightly increased and the clamping force of the knob part +51 is strengthened to make it vibration resistant.
It has improved impact resistance. In addition, a small protrusion (72
) may be provided on both sides of the inner surface of the contact plate (2).

12 to 14 further show other embodiments of the present invention, in which FIGS. 12(a) and 12(b) are perspective views of the lock cover seen from the left and right sides, and FIG. The figure is a side view showing the lock cover attached to the knob of the operating handle (before locking), and Figures 14(a) and 14(b) are plan views showing the lock cover attached and locked with a padlock. , a side view. In these figures, (80 is a lock cover that is attached to the knob part (9) from the side;
It is structured as follows.

(82) is a protection member, which extends the U-shaped contact plate (7) toward the front side in the width direction by a distance E to form an inverted U-shaped space (83).

(84) is a support plate extending from the front side of the plate opening to the right in the rotating direction of the operating handle (3), and (84a) is a support plate provided on the support plate (84). Case (1
) is an abutting surface that is an abutting member that abuts on the abutting surface. (86) is a side member, which is provided on the front side of the protection member (82) with a distance F from the support plate (84), and the support plate (86) is provided below.
Similarly to 84), a case contact portion (86a) that is a contact portion that comes into contact with the case (1) is provided.

The rest of the structure is the same as that of the embodiment shown in FIG. 8, so the same reference numerals are given to the corresponding parts and the explanation is omitted. and the side member (86) from the support plate (8=11 and the fixed part <62a fixed to the right side of the side member (86)) toward the plate (7) as shown in the figure. The intersecting portion (62b) intersects the locking hole (23) between the locking portion (62c) and the partially cut-out hooking portion (62c).

As shown in FIG. 13, the latching portion (62c) of the latching member 62 is always located to the right of the inner surface of the right side of the contact plate (7), as in the embodiment shown in FIG. It is.

When the padlock is locked, the arm part (15a) of the padlock pushes down the intersection part (62b) to elastically deform the locking member (62) and insert the arm part (15a) of the padlock into the locking hole (23).
Insert a). Moreover, after the arm part (15a) of the padlock is inserted, the arm part (15a)
b) is pushed down, the hook IE part (62
c) enters the inverted U-shaped cavity E (83) and is hooked to the other side of the knob (5).

In the lock cover (81) configured as described above, the latch member (62) is connected to the support plate (84) and the side member (81).
Since it is protected from the outside by being sandwiched between the latching member (62c) and
) is an inverted U-shaped space (
83) is hooked to the other side of the tab (9), so it is similarly protected from the outside.

FIG. 15 is a perspective view of a lock cover (91) showing another embodiment of the present invention. In the embodiment of FIG. Element(
82), forming an inverted U-shaped space (83), and a hook part (62c) at the lower front side of the protective member (82) as shown in the figure.
) is provided with a bonfire through which people can pass.

(Number 92 is a side member, which extends downward and to the right in front of the protection member (82) and connects the latch member (62) to the support plate (22).
), and its height is the same as the thickness of the hanging member (62), and the case contact part (
92a).

FIG. 16 is a perspective view of a lock cover showing another embodiment of the present invention. In this embodiment, the support plate (102)
and the side member (103) have the same shape, and the locking hole (
23) is provided for both. The locking member (62) is sandwiched between the support plate (102> and the side members (1, 03) and protected from the outside. In this case, a slightly thick padlock is used, and the support plate (102) and side member (1
03), insert the arm part (15a) into the locking hole (23) provided in both of the parts while pushing down the intersection part (62b) with the arm part (15a). Note that (102a> is the contact surface of the support plate (102) that comes into contact with the case (1), (103
a) is a case abutting portion that abuts on the case (1) of the side member (+03).

FIGS. 17 to 19 show still another embodiment of the present invention, which is similarly constructed of an integrally molded plastic product. This embodiment combines the functions of the embodiment shown in Fig. 2 and the embodiment shown in Fig. 8. Fig. 17 is a perspective view of the lock cover <III), Fig. 18 is a side view, FIG. 19 is a side view showing the locked state. In these figures, the U-shaped stop plate (7) has a width W that is larger than the width D of the knob (5) (see Figure 1), which is different from the hook part (113).
) (described later) is widened by the thickness t (W=D+
t, see Figure 17), by providing a cut groove (112) between the contact plate opening and the connecting plate 8), the front side of the contact plate (7) can move freely, and the contact plate (7) A cantilevered arm-shaped latching member (24) is provided extending from the front side. The latching member (24) has another latching part (+13) half-moon-shaped with a thickness S on the front side as shown in the figure, and is normally attached to the inner surface of the contact plate (7) as shown in Fig. 18. Located to the right of
It is designed to prevent interference when the lock cover (Ill) is attached to and removed from the knob portion (5).

After attaching the lock cover (Ill) to the knob part (51), push down the right end of the locking member (24) and insert the arm part (15a) of the padlock into the locking hole (23). As shown in FIG.
) and the connecting plate (to), sandwich the knob (5) from both sides,
At the same time, the hook part (24c) is attached to the inner wall (2a) of the opening of the case.
) is locked when it is latched. In this embodiment, the latch (24c) is connected to the case (1) by another latch (24c).
113) is hooked to the knob (9), so that it does not easily come off even when a rotational moment is generated due to a force applied in the direction of mounting and removing the lock cover (Ill).

FIGS. 20 and 21 further show other embodiments of the present invention, FIG. 20 is a perspective view of the lock cover (+21>, and FIG. 21 is a side view, showing the hole in the knob (51). (
5d) is a square hole, and the fitted part is a square column (10).
Then, with the plate (7) only on the front side, make a square column (■0
), the engagement plate ω, and the connecting plate ■ (12)
), and a support plate (22) is provided on this. The lock cover (12
1) is attached so that the rectangular hole (not shown) previously provided on the side of the knob of the operating handle and the square pillar (10) fit together and are locked.

In addition, in each of the above-mentioned embodiments, a round hole or a rectangular hole is provided in the protrusion part to fit the fitted part of the lock cover, but the engagement between the knob part and the lock cover is different. Various methods may be adopted depending on the shape of the knob portion without impairing the object of the present invention. For example, FIGS. 22 and 23 show one embodiment of such engagement;
Figure 2 is a perspective view of the lock cover (+3+), Figure 23 is a side view showing the state in which the lock cover (131) is attached.
) is provided with rail-like protrusions (+32), which are fitted parts, on the inner surfaces of both sides of the contact plate (7), and are fitted into the grooves provided in the knob part (9).

Furthermore, for example, in the embodiment shown in Fig. 2, the lock cover (2
Although the hanging part (24c) of 1) is shown to be hung on the inner wall (2a) of the opening of the case (1), the hanging member is not limited to this, and the hanging member can be attached to other parts of the case. Note that in each of the embodiments shown in Figs. 6, 7, 12, and 15, the abutting member that abuts the case abuts both the support plate and the side member. Although it is provided as a surface and a case abutting part, either one may be used, and for example, in the embodiments shown in FIGS. It may also be used as an abutting member.

In addition, in the embodiments shown in FIGS. 12 and 15, a protective member (82
), but this is not essential.

Note that the cross-sectional shape of the bending portion of the operating handle is not limited to a rectangular shape, but may be round, oval, or other shapes, and the engagement between the knob portion and the engaging member is not limited to the present invention. There may be a gap within the range that does not impair the purpose, and the intersection of the latching member with the locking hole is not essential; for example, even if the latching member does not have an intersection, Pass slightly below the arm part of the padlock (15
It is also possible to use a method such as fitting a thick ring in a) and pushing the locking member through this ring.

〔Effect of the invention〕

As described above, according to the present invention, the lock cover has a lock hole through which the operating handle, the retaining member that engages with the protrusion of the dollar so as not to rotate, and the locking member that prohibits removal of the lock cover are inserted. The extending member and the retaining member are extended from the fixed part fixed to the retaining member and are elastically deformable in the shape of a cantilever arm, and when the locking member is inserted into the locking hole, the locking member is elastically deformed and hooked to the case, and the protruding part Since the locking member is provided to prevent the locking member from disengaging from the locking member, the locking cover can be easily attached and detached without applying a large force, and handling is convenient.

Further, the lock cover is provided so that it can be elastically deformed in a cantilevered 7°-m shape by extending from a fixed part fixed to the extension member, and when the locking member is inserted into the locking hole, the protruding part is elastically deformed. Since a latching member is provided that is latched to the other side and is capable of interposing the protruding portion between the lateral abutting portion and preventing the protruding portion from disengaging from the retaining member, The lock cover can be easily attached and detached without applying much force, making it convenient to handle, and when the locking member is inserted, it is firmly latched onto the protruding part of the operating handle, so it is locked. High reliability.

In addition, since the latch member is sandwiched and protected between the extension member and the side member, it is less susceptible to damage from the outside and is easy to handle. In addition, since it is difficult to touch the latch member when the lock is in place, it is difficult to accidentally hook the latch member. To improve the reliability of locking by deforming a locking member to prevent the locked state from being released.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention. Figures 1(a) and 4(b) are a perspective view and a sectional view of the operating handle of the NFB, and Figure 2 is a perspective view of the lock cover. Figure 3 is a side view showing state B (before locking) with the lock cover attached to the knob of the NFB operating handle, and Figures 4 (a) and (b).
) are a plan view and a side view showing the state in which the lock cover is attached and the padlock is locked, respectively, and FIG. 5 shows another embodiment of the present invention. (b) is a side view showing the state in which it is attached to the knob, and FIG. 6 (a) shows another embodiment of the present invention.
The figure is a perspective view of the lock cover, FIG. 7B is a perspective view of the locked state, FIG. 7 is a perspective view showing another embodiment of the present invention, and FIGS. Fig. 8 is a perspective view of the lock cover, Fig. 9 is a side view of the mouth cover, and Figs. 10 (a) and (b) show the lock cover attached to the knob of the operating handle. Fig. 11 is a perspective view of a lock cover showing another embodiment of the present invention, and Figs. 12(a) and 12(b) are perspective views of the lock cover seen from the left and right sides, respectively, and FIG. 13 shows the lock cover attached to the knob of the operating handle. A side view showing the fitted state (before locking), Figs. 14(a) and 14(b) are a plan view, a side view, Figs. 15 and 16 respectively showing the state in which the lock cover is attached and the padlock is locked. 17 to 19 are perspective views showing other embodiments of the invention, respectively, and FIGS. 17 to 19 show further embodiments of the invention.
FIG. 8 is a perspective view and a side view of the lock cover, FIG. 19 is a side view showing the locked state, and FIG. 20 is a side view of the lock cover. FIG. 21 shows a perspective view and a side view of a lock cover showing another embodiment of the invention, and FIGS. 22 and 23 show another embodiment of the invention, and FIG. 22 shows a lock cover. A perspective view of the cover, FIG. 23 is a side view showing the cover attached to the knob, FIGS. 24 to 28 show a conventional operation handle locking device, and FIG. 24 shows the lock cover attached to the NFB operation handle. Fig. 25 is a perspective view of the lock cover seen from the opposite side, and Fig. 26 shows the operation handle section showing the padlock locked on the attached lock cover. Longitudinal cross-sectional view of
Fig. 27 is a sectional view taken along cut plane xx■-xx■ in Fig. 26 showing the state of the locking member hooked to the opening of the case, and Fig. 28 is a plan view showing the state in which the lock cover is attached. be. In the figure, (1) is the case, +21 is the opening of the case, (2a) is the inner wall of the opening, (3) is the operating handle, (
5) is the knob part, (5d) is the hole, (7) is the contact plate, (a is the connecting plate, (!0) is the fitted part, (12) is the retaining member,
(2+), (old version 311) (51>, (61),
(71), (81), (91), (+01),
(Ill), (121). (+31) is a lock cover, (22), (84),
(102) is a support plate. (22a), (84a), (102a) are contact surfaces;
(23) is a locking hole, (24), (62) is a latch member,
(24a) and (62a) are the fixing parts of the hanging members;
c), (62c) are latching parts, (42), (52). (86), (92), (103) are side members, (4
2b), (52b). (86a), (92a), and (103a) are case contact parts, (113) is another hooking part, and (132) is a rail-like projection. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (3)

[Claims] (1) A case having an opening and accommodating a mechanism, a protrusion that is rotatably supported by the case and protrudes from the opening to be rotated from outside the case, and an operation for operating the mechanism. In the operation handle locking device, the lock cover includes a fitting part provided on the handle and the protrusion, and a lock cover that is attached to the protrusion from one side and restricts operation of the operation handle. An engaging member that has a fitted portion that is fitted into the mating portion and engages with the protruding portion without rotation, and is provided extending from the engaging member in the rotating direction, and removal of the lock cover. an extension member having a locking hole through which a locking member is inserted, the locking hole being provided so as to be elastically deformable by extending in a cantilevered arm shape from a fixed part fixed to the engagement member in the rotational direction; A locking member that is elastically deformed when the locking member is inserted into the case and is hooked to the case to prevent the protrusion from disengaging from the engagement member, and the case. An operating handle locking device comprising an abutting member that comes into contact with the protrusion to prevent rotation of the protrusion. (2) A case having an opening and accommodating a mechanism, a protrusion that is rotatably supported by the case and protrudes from the opening to be rotated from outside the case, and an operation for operating the mechanism. In the operation handle locking device, the lock cover includes a fitting part provided on the handle and the protrusion, and a lock cover that is attached to the protrusion from one side and restricts operation of the operation handle. An engagement that has a fitted part that is fitted into the mating part and a side abutting part that can come into contact with one side of the protruding part, and that engages the protruding part without rotation. a member, an extending member extending from the engaging member in the rotational direction and having a locking hole through which a locking member for prohibiting removal of the lock cover is inserted, a fixing portion fixed to the extending member; The locking member is provided in a cantilevered arm shape so as to be elastically deformable and extends toward the protrusion, and when the locking member is inserted into the locking hole, the locking member is elastically deformed and is latched to the other side of the protrusion. and a latching member configured to prevent the engagement member from disengaging from the engagement member, and an abutment member that comes into contact with the case to prevent rotation of the protrusion. Operation handle locking device. (3) A case having an opening and accommodating a mechanism, a protrusion rotatably supported by the case and protruding from the opening to be rotated from outside the case, and an operation for operating the mechanism. In the operation handle locking device, the lock cover includes a fitting part provided on the handle and the protrusion, and a lock cover that is attached to the protrusion from one side and restricts operation of the operation handle. A fitting having a fitted part that is fitted into the mating part and a side abutting part that can be brought into contact with one side of the protruding part and that engages with the protruding part in a non-rotatable manner. a mating member, an extending member extending from the engaging member in the rotational direction, a side member provided at a distance from the extending member, and the lock provided on the extending member or the side member. a locking hole into which a locking member for prohibiting removal of the cover is inserted; a locking hole is provided between the extension member and the side member so as to be elastically deformable in the shape of a cantilevered arm, and the locking member is inserted into the locking hole; a latching member that is elastically deformed and latched to the other side of the protrusion to prevent the protrusion from disengaging from the engagement member; and a latching member that comes into contact with the case to prevent rotation of the protrusion An operating handle locking device comprising an abutment member that prevents movement.