JPH0779511A - Locking system for draw-out type machine - Google Patents

Abstract

PURPOSE:To shorten the overall width of a locking system by forming a locking rod and lever integrally thereby shortening the lever. CONSTITUTION:A lock hole 5A is made through a lock plate 5 fixed to a cradle 4 through a support 5B. A locking rod 15 penetrates the lock hole 5A and holes made through upper and lower supports 16A, 16B. A horizontal lever penetrates the locking rod 15 in the way thereof and bonded in place. A compressive spring 19 surrounds the locking rod 15 between the upper support 16A and a truck 1. A stopper for a lever 14, i.e., a bolt 17, is secured to the right side of the upper support 16A by means of a nut 18. When the lever 14 is pulled up manually, the locking rod 15 is lifted and removed, at the lower end thereof, from the lock hole 5A thus unlocking a truck 1. Since the locking rod 15 and the lever 14 are formed integrally, the width can be decreased and since no pin nor bearing is required, cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for mounting a circuit breaker or the like on a bogie and locking a drawer type device which is put in and taken out from a switchboard in a drawn position and an operating position.

[0002]

2. Description of the Related Art Draw-out equipment is fixed to a switchboard side in its draw-out position and operating position to prevent the draw-out equipment from slipping off from the switchboard. FIG. 5 is a side view showing the configuration of the drawer type device. The cradle 4 is fixed in a switchboard (not shown), and the carriage 1 moves on the cradle 4 in the left-right direction. An electric device 3 such as a vacuum circuit breaker is placed on the trolley 1, and is connected to a main circuit 22 on the switchboard side via a contact 2. FIG. 5 shows a configuration in which the electric device 3 is in the operating position, and the contact 2 and the main circuit 22 are disconnected by pulling the cart 1 to the right (to the pull-out position). A lock device for the drawer type device is provided at a portion A of FIG.

FIG. 6 is a sectional view showing the structure of a conventional lock device for a drawer type device. Support 5B for cradle 4
A lock hole 5A is formed in the lock plate 5 attached via. The support 8 is fixed to the dolly 1, and the lock bar 6 penetrates the lock hole 5 </ b> A and the dolly 1 and the support 8. A pin 13 extends through the upper portion of the lock bar 6 and is rotatably connected to the lever 7. A pin 12 penetrating the lever 7 is fitted with a bearing 11 fixed to the carriage 1 and is rotatably supported. Further, the pin 10 penetrates through the middle of the lock rod 6 and is placed on the support 8. Further, a compressible spring 9 winds the lock rod 6 and is sandwiched between the carriage 1 and the pin 10.

In FIG. 6, lock holes 5A are opened at two positions, that is, a pulling position and an operating position of the drawer type device. In FIG. 6, only one place is shown as a representative. When the right end of the lever 7 is manually rotated in the B direction, the lock bar 6 is raised via the pin 13. As a result, the lower end of the lock rod 6 comes out of the lock hole 5A, and the truck 1 is unlocked.
In that state, move the drawer type device horizontally to move it to the drawer position or the operating position. Spring 9 is lever 7
The lock rod 6 is constantly urged downward so that the lock rod 6 does not come out of the lock hole 5A even if the hand is released. It should be noted that even when the lever 7 is released by hand when the drawer type device is moving in the horizontal direction, the lower end surface of the lock rod 6 simply slides on the upper surface of the lock plate 5 without causing any trouble.

[0005]

However, the conventional device as described above has a problem that the lateral width is large because the lever is long. That is, since the lever is rotated about the shaft center, unless the lever is lengthened to some extent, the force for raising the lock rod is not generated. Therefore, the width of the entire locking device is increased.

An object of the present invention is to reduce the width of the locking device and to make it inexpensive.

[0007]

In order to achieve the above object, according to the present invention, a lock for mounting an electric device on a trolley and holding a drawer type device which is put in and taken out from a switchboard in a drawn position and an operating position. The device is a lock rod that can move up and down, a lever that manually moves the lock rod up and down, a spring that urges the lock rod downward, and a lock rod that is lowered at the pull-out position and the operating position of the drawer type device. A lock plate having a lock hole into which the lock rod is inserted when the lock rod is inserted, and the lock rod and the lever are integrally formed.

In such a structure, it is assumed that the stopper is provided to determine the upper limit of the movement of the lever, and the lever directly contacts the stopper. Further, the stopper is formed of a bolt.

[0009]

According to the structure of the present invention, since the lock rod and the lever are integrally formed, the lock rod can be raised only by raising the lever. Therefore, the lever needs to be as long as it can be grasped by hand, and therefore can be short. As a result, the width of the lock rod device as a whole is reduced. In addition, the number of parts is reduced and the cost is reduced.

In such a structure, since the stopper with which the lever directly abuts is provided, the parts of the lever itself are simplified. Further, since the stopper is formed by the bolt, it is not necessary to manufacture a stopper component specially, so that the apparatus becomes inexpensive.

[0011]

EXAMPLES The present invention will be described below based on examples.
FIG. 1 is a sectional view showing the structure of a lock device for a drawer-type device according to an embodiment of the present invention. Lock hole 5A in lock plate 5 attached to cradle 4 via support 5B
Is open. The lock rod 15 penetrates the lock hole 5B and the holes of the upper support 16A and the lower support 16B. A horizontal lever 14 penetrates and is fixed in the middle of the lock bar 15. A compressible spring 19 winds around the lock rod 15, and is sandwiched between the upper support 16A and the carriage 1. On the right side of the upper support 16A, a bolt 17 that serves as a stopper for the lever 14 is fixed by a nut 18.

FIG. 2 is a view taken in the direction of arrow P in FIG. 1. The upper support 16A and the lower support 16B are formed in a U shape and are fixed to the carriage 1 by bolts 20. The lever 14 is formed of a round bar. FIG. 3 is a view taken in the direction of the arrow Q in FIG. 2, in which the lock bar 15 made of a prism is the upper support 1.
It penetrates 6A.

In FIG. 1, the lock hole 5A is formed at two positions, that is, a pull-out position and an operating position of the drawer type device, as in the conventional device. When the lever 14 is manually raised, the lock rod 15 also rises. As a result, the lower end of the lock bar 15 is pulled out from the lock hole 5A, and the truck 1 is unlocked. In that state, move the drawer type device horizontally to move it to the drawer position or the operating position. The device of FIG. 1 is inexpensive because it has no pins or bearings as in the prior art. In addition, the spring 19 keeps the lock bar 15 even if the lever 14 is released.
Lock bar 15 to prevent the key from coming out of the lock hole 5A.
Is urged downward.

FIG. 4 is a sectional view showing a state in which the lock of the apparatus of FIG. 1 is unlocked and the carriage is slid. Lever 14
When the carriage 1 is moved horizontally with the lever raised, even if the lever 14 is released, the lower end surface of the lock bar 15 simply slides on the upper surface of the lock plate 5 as shown in FIG. It is the same as the conventional device. Also, the bolt 18 is the lever 1
It is a stopper that determines the upper limit of 4. Since the lever 14 directly contacts the bolt 18, no processing is required on the lever 14 side. Further, since the stopper is also composed of the bolt 18 and the nut 17 which are general-purpose parts,
It requires no special processing and is inexpensive.

[0015]

As described above, according to the present invention, since the lock rod and the lever are integrally formed, the lever can be shortened and the width of the lock device as a whole can be reduced.
Moreover, since the number of parts is small, it is cheaper than the conventional device. Further, in such a configuration, since the stopper that directly abuts the lever is provided, the processing of the lever itself is not required, which is inexpensive.

Further, since the stopper is also a general-purpose bolt and nut, it is inexpensive.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a lock device of a drawer type device according to an embodiment of the present invention.

FIG. 2 is a view on arrow P of FIG.

FIG. 3 is a view on arrow Q in FIG.

FIG. 4 is a cross-sectional view showing a state where the device of FIG. 1 is unlocked and horizontally slid.

FIG. 5 is a side view showing the configuration of the drawer type device.

FIG. 6 is a cross-sectional view showing the configuration of a conventional lock device for a drawer-type device.

[Explanation of symbols]

1: trolley, 4: cradle, 5: lock plate, 5A: lock hole, 5B: support, 14: lever, 15: lock rod, 16A: upper support, 16B: lower support, 17,
20: Bolt, 18: Nut, 19: Spring

Claims (3)

[Claims] 1. A lock device for mounting an electric device on a trolley and holding a drawer type device that is put in and taken out from a switchboard at a pull-out position and an operating position, the lock rod being movable up and down.
It is equipped with a lever that manually moves this lock rod up and down, a spring that urges the lock rod downward, and a lock hole into which the lock rod is inserted when the lock rod is lowered in the drawer position and operating position of the drawer type device. And a lock plate, wherein the lock rod and the lever are integrally formed. 2. A lock device for a drawer type device according to claim 1, further comprising a stopper for determining an upper limit of the movement of the lever, and the lever is configured to directly contact the stopper. 3. The lock device for a drawer type device according to claim 2, wherein the stopper is formed by a bolt.