JPH0219682B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides an automatic method for automatically discharging or inserting a sheath breaker when the sheath breaker is located at a predetermined disconnection position, test position, or connection position. This invention relates to a position locking device for a drawer or disconnector which locks the drawer and insert operations and makes the respective positions clear.

[Prior art]

Conventional position locking devices of this type do not lock the worm gear on the front side of the shaft that is operated to pull out and insert the shroud cutter, and the worm gear is not locked at the front side when the pull-out frame and the shredder main body are engaged. It is common for the device to be locked. In such a device, the shaft rotational force of the operator is greatly amplified by the worm gear,
There was a defect that led to damage to the engaging part. In addition, there is no holding function when removing the lock and pulling out and inserting the cutter, which is inconvenient as the user must continue to release the lock with one hand while pulling out and inserting the cutter with the other hand. .

[Summary of the invention]

This invention was made in order to eliminate the above-mentioned drawbacks, and by applying a lock at a portion where the force for pulling out and inserting is weak, it is possible to prevent damage to the locking part and reliably lock the pulling and inserting operations. The object of the present invention is to provide a device that mechanically holds the device only temporarily when the lock is released and can be pulled out and inserted without using both hands.

[Embodiments of the invention]

Figure 1 is a perspective view of a general drawer type and disconnector.
1 is a branch or disconnector, 2 is a drawer frame, 19 is a mounting screw 20
This is a cam fixed to the inside of the drawer frame side plate. FIGS. 2 to 4 are diagrams showing the drawn-out state of the chopper and disconnector, in which 3 is a pull-out lever, 4A and 4B are rollers, and 5 is a pull-out rail.

FIGS. 5 and 6 show an embodiment of the present invention, and 6 shows a handle for pulling out the cutter and the cutter.
It is fixed to the side plate 8 of the breaker with screws or the like. Reference numeral 7 denotes a lock lever for locking the drawer and insertion operations, which is rotatably attached to the side plate 8 by a rotary shaft 17, and is adapted to engage with the external operation section 7A and the cam 19 for position detection shown in FIG. Bent part 7
B protrudes from the holes 8A and 8B of the side plate 8, respectively, and the mustard cutter body. 9 is the wormshaft,
One end thereof is provided with a hexagonal part for engaging a drawer handle (not shown), the other end is provided with a worm gear 12, and the entire shaft is mounted on a support base 11.
It is supported on the side plate 8 by A and 11B. A plate spring 14 is fixed to the support base 11A with a mounting screw 15, and a sloped portion 14A at the tip locks the lock lever 7.
is biased clockwise in the figure. The wormshaft 9 has a lock gear 1 having a locking portion 10A.
0 is fixed, and the locking portion 7C of the lock lever 7
It is configured to engage with the worm shaft 9 and prevent rotation of the worm shaft 9. 13 is the worm gear 12
The worm wheel that meshes with the worm wheel, 14 is the mounting screw 1
5, a leaf spring whose one end is fixed to the support base 11A;
6 is a stopper, 17 is a rotation shaft, and 18 is a drive shaft.

Next, the operation of this invention will be explained. Fig. 7 shows the locked state of the wormshaft 9, Fig. 8 shows the unlocked state of the wormshaft 9, Fig. 9 is an enlarged perspective view of the cam 19, and Fig. 10 shows the state when inserting a cutter or disconnector. FIG. 11 is an explanatory diagram of the operation when the breaker is pulled out. First, in FIG. 7, the wormshaft 9 is locked by the lock lever 7, so apply an external force in the direction F in the figure as shown in FIG. 8 to rotate the lock lever 7 counterclockwise (as shown in FIG. 10). 7B moves from a to b).
At this time, the inclined portion 14A of the leaf spring 14 and the locking portion 7C
is no longer engaged, the biasing force G from the leaf spring 14 is directed toward the rotating shaft 17, and the lock lever 7 is held in a rotating state. Then perform the insertion operation and disconnect the disconnector 1.
When inserted into the drawer frame, the protrusion 19B of the cam 19
The lock lever 7B contacts and is moved downward in the figure. At this time, the inclined portion 14 of the leaf spring 14 mentioned above
A comes into contact with the locking portion 7C, and the lock lever 7 is rotated clockwise in the figure (FIG. 10c→d). However, a portion 19D of the cam 19 prevents the locking lever 7C from engaging with the lock gear 10 (FIG. 10d). By further inserting the lock lever, the bent portion 7B of the lock lever falls into the notch 19E of the cam 19, the lock lever 7 is rotated clockwise, the locking portion 7C of the lock lever engages the lock gear 10, and the worm shaft is rotated. 9 is prevented from rotating (Fig. 10e). By disengaging the engagement again using external force F as shown in FIG. 8, the insertion operation becomes possible (FIG. 10f).
Here, a in FIG. 10 is the disconnection position, e is the test position,
i is the connection position. During the withdrawal process, the automatic lock is activated in the order shown in FIG. 11 by the reverse operation to that described above.

〔Effect of the invention〕

As described above, according to the present invention, by adopting a structure in which the lock is applied before the booster (worm gear) that performs the pull-out and insertion operations, a force greater than that which can be exerted by a person is not applied to the locking portion. This prevents damage to the locking part, and the action of the leaf spring keeps the lock unlocked even if you don't keep unlocking it, and when the cutter is positioned at the next predetermined position, automatic locking is ensured. However, it is possible to obtain a position locking device for a drawer type or disconnector that is extremely easy to operate.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a general drawer type and disconnector, FIGS. 2 to 4 are explanatory views of the drawn out state, and FIG. 5 is a side view showing an embodiment of the present invention.
Figure 6 is a perspective view of the cam, Figures 7 and 8 are explanatory diagrams of its operation, Figure 9 is an enlarged perspective view of the cam portion, and Figures 10 and 11 are explanatory diagrams of the operation of this cam. It is. In the figure, 1 is a branch and disconnector, 2 is a drawer frame, 3 is a drawer lever, 4 is a roller, 5 is a drawer rail, 6 is a drawer handle, 7 is a lock lever, 8 is a side plate, 9 is a worm shaft, and 10 is a lock gear , 11 is a support stand, 1
2 is a worm gear, 13 is a worm wheel, 1
4 is a leaf spring, 15 is a mounting screw, 16 is a stopper,
17 is a rotating shaft, 18 is a drive shaft, 19 is a cam, 20
is the mounting screw. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A drawer-shaped cutter that is composed of a cutter main body and a drawer frame, and that allows the cutter to be pulled out from the drawer frame and inserted, which has an engaging part with a worm gear attached to the cutter main body. The lock lever includes a pull-out operating shaft having a lock gear, a lock lever disposed to engage with the engaging portion and operable from the outside, and a leaf spring that urges the lock lever to engage with the lock gear. Interlocking with the position detection cam attached to the frame side, when the sheath cutter is located at a certain position, the lock lever and lock gear automatically engage to prevent the withdrawal and insertion operations, and the above-mentioned A position locking device for a drawer type or disconnector, characterized in that when the lock lever and the lock gear are disengaged from the outside, the biasing force of the leaf spring is eliminated so that the engagement operation is not performed.