JPH019056Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a locking device for a rotating shaft, which locks a rotating shaft disposed on one side of a flexible body from the other side of the flexible body.

2. Description of the Related Art In electrical equipment such as disconnectors and grounding devices, electric operating devices are used that convert the rotational force of an electric motor into high torque, low-speed rotation using a speed reduction device to perform a closing or opening operation. Electrically operated electrical equipment like this is configured so that it can be operated electrically by commands issued from the switchboard and manually operated at the installation location. A means of locking the shaft is used.

A conventional locking device for a rotating shaft is constructed as shown in FIGS. 1 and 2. The one in the diagram is electric motor 1
A transmission device consisting of gears 4 and 6 and a chain 7 transmits the driving force of configured to
A blocking member 35 that prevents the rotation of the locking member 34 fixed to the motor output shaft 2 is fixed to the mounting plate 36 with a stepped pin 37, and the lock 24 is attached to the stepped pin 37 to prevent erroneous operation. It is being done.

Incidentally, since the closing and opening operations of electrical equipment are performed by rotating the motor output shaft 2 multiple times, the stop position of the motor output shaft 2 after the operation is the second
As shown in the figure, the locking member 34 and the blocking member 35 are not necessarily in a position where they can fit together, but as shown in FIG.
The blocking member 35 may stop at a position where it cannot be inserted. Therefore, when stopped at such a position, a predetermined handle (not shown) is inserted into the manual handle insertion port 38 and rotated, and the locking member 34 is rotated.
The position of is corrected.

As described above, the conventional rotary shaft locking device has the disadvantage that it is necessary to check and correct the position of the locking member when locking the door, and that the blocking member cannot be fixed unless the door is opened.

This invention has been made in view of the above, and provides a locking device for a rotating shaft that can fix a blocking member from the other side of the shield body, that is, from the outside of the frame in which the rotating shaft is housed.

The figure will be explained below. 4 to 6, 1 is an electric motor, 2 is an output shaft of the electric motor, that is, a rotating shaft, 3 is a locking member that is concentric with the rotating shaft 2 and has an outer circumference of a predetermined radius, and 3a is a locking member 3. 4 is a gear fixed to the rotating shaft 2; 5 is an input shaft of the reduction gear; 6 is a gear fixed to the input shaft 5; 7 is a gear 4; and 6, 8 is a side plate of a frame housing the electric motor 1 and a reduction gear (not shown), that is, a shield body, 9 is a guide arm fixed to the shield body 8, When the locking member 3 is in a predetermined position, the locking portion 3
It has a through hole 9a facing a. Reference numeral 10 denotes a spring receiver fixed to the guide member 9, which has a support surface that is approximately perpendicular to the axial direction of the hole 9a and has a predetermined interval therebetween, and a through hole 10a that is approximately coaxial with and has the same diameter as the through hole 9a is provided on the support surface. It is being 11 has hole 9 on one end
12 is a collar fixed to the shaft 11, 13 is a connecting plate fixed to the other end of the shaft 11, and the above 11, 12, and 13 constitute a blocking member 14. be done. 15 is a spring provided between the spring receiver 10 and the collar 12, and the blocking member 14
is pressed in a direction approaching the locking member 3. 1
6 a bearing provided on one side of the shield body 8, 1
Reference numeral 7 denotes a lever pivotally attached to a bearing 16 at a predetermined lever ratio, and one end of which is configured to be connectable to the blocking member 14 . 18 is a shaft, 19 is an operating shaft provided through the shield body 8, and one end is connected to the lever 17 and the shaft 20.
and a first hole 1 at a predetermined interval at the other end.
9a and a second hole 19b are provided. The operation member 21 is constituted by the above 17, 19, and 20.
A fixing member 22 is provided on the other side of the shield body 8, and is provided with a hole 22a that fits each hole 19a, 19b of the operating shaft 19. Reference numeral 23 denotes a stepped shaft inserted into the hole 22a and the second hole 19b, and a hole 23a of a predetermined diameter is provided at the end. 24 is hole 23
It is a lock with a hook inserted in a.

The structure shown in FIG. 4 constructed in this manner has a locking portion provided in the circumferential direction of rotation of the locking member 3 fixed to the rotation shaft 2 disposed on one side of the shield body 8. Blocking member 14 approaching 3a by means of spring 15
are separated by operating the operating member 21 which penetrates the shield body 8 and is connected to the blocking member 14, and inserts the stepped shaft 23 into the second hole 19b and the hole 22a. A state is shown in which the lock 24 is engaged to prevent the engaging member 3 from engaging with the blocking member 14, and the closing or opening operation can be performed electrically or manually.

In the state shown in FIG. 4, when the lock 24 is removed and the stepped shaft 23 is pulled out, the blocking member 14 approaches the engaging member 3 due to the pressing force of the spring 15, as shown in FIG. to lock. At this time, one end of the operating member 21, that is, the lever 17
It tilts with the action of As a result, the stepped shaft 23 is inserted into the first hole 19a of the operating member 21 and the fixed member 22, and the lock 24 is engaged to prevent erroneous operation of the rotating shaft 2.

Furthermore, even when the rotating shaft 2 stops and the engaging portion 3a does not face the blocking member 14 as shown in FIG. 6, but the outer peripheral surface faces the blocking member 14, the locking operation is the same as above. operate the operating member 21 to
The hole 19a is fixed to the fixing member 22. As a result, when the rotation shaft 2 is rotated due to an erroneous operation, the blocking member 14 slides on the outer peripheral surface of the engagement member 3 at a predetermined angle, and is automatically engaged by the pressing force of the spring 15. The joint portion 3a is locked.

In FIG. 7, the operating member 26 is composed of a plate-like member 25 that can be connected to the connecting plate 13 and an operating shaft 19, and the same effect as the above embodiment is expected. 8 and 9 respectively show engagement members according to other embodiments, and the one in FIG. 8 has a plurality of holes provided in the outer peripheral surface of the cylindrical member 27 toward the axis. The locking part 28 is constructed by implanting a plurality of protruding members 30 on the outer circumferential surface of the cylindrical member 29 and forming an engaging part 31 between each protruding member 30 in the one shown in FIG. , the number of engaging parts is increased, and the blocking member 1
This facilitates engagement with 4.

In addition, in the above embodiment, a case was explained in which the rotating shaft is the output shaft of the electric motor, but even if the input shaft of the reduction gear is configured to be locked as the rotating shaft, the same effect as in the above embodiment can be obtained. You can expect.

According to this invention, the blocking member and the locking member are engaged with or disengaged by the operating member that penetrates the shield body, and the operating member is fixed at each position by the fixing means, making it impossible to operate. By doing so, the locking of the rotation shaft can be operated from the other side of the shield body, that is, from the outside of the frame that houses the electric operating device, so when locking, open the door and check the position of the locking member. There is no need to check or modify the lock, making locking work extremely easy.

[Brief explanation of the drawing]

Figures 1 to 3 each show a conventional locking device, with Figure 1 being a perspective view showing the configuration, Figure 2 being a front view showing the locked state, and Figure 3 showing the stop position of the rotating shaft. Partial views to be explained and FIGS. 4 to 6 show examples of this invention, respectively. FIG. 4 is a front view showing the open state, FIG. 5 is a front view showing the locked state, and FIG. 6 is a front view showing the locked state. FIG. 7 is a front view showing another embodiment, and FIGS. 8 and 9 are perspective views of engagement members according to other embodiments. In the figure, 2...rotation shaft, 3...locking member,
3a... Engaging portion, 14... Blocking member, 15... Spring, 21... Operating member, 22... Fixing member, 23
...Stepped shaft, 24...Lock.

Claims (1)

[Claims for Utility Model Registration] (1) A locking member fixed to a rotation shaft disposed on one side of the shield body and having a locking portion in the circumferential direction around which the rotation shaft rotates; a blocking member that approaches the moving shaft and engages with the locking portion of the locking member to prevent rotation of the locking member; this blocking member presses the blocking member in a direction that approaches the rotation shaft; a spring that penetrates the shield body from the other side of the shield body and engages with the blocking member, and moves the blocking member in a direction away from the rotation axis against the spring; an operating member capable of performing the operation in a first position where the blocking member is locked with the locking portion of the locking member or in a second position where the blocking member is released from the locking portion of the locking member; A locking device for a rotating shaft, which is equipped with a fixing means that makes the member inoperable. (2) The locking device for a rotating shaft according to claim 1 of the utility model registration claim, characterized in that there are a plurality of locking portions. (3) The locking member has an outer periphery having a predetermined radius centered on the center of the rotating shaft, and a concave locking portion is formed on the outer periphery. A locking device for a rotating shaft according to the scope 1 or 2. (4) The locking device for a rotating shaft according to claim 3, wherein the blocking member is pressed by a spring and is slidable on the outer periphery of the locking member.