JPH0510490Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The invention provides a means for guiding the movement between a movable frame to which electrical equipment is fixed and a fixed frame in which the movable frame is housed. When the movable frame is stored in or pulled out from the fixed frame,
A movable contact provided on the electrical device and a fixed contact provided on the fixed frame close or open each other, and at this time, a predetermined mutual contact between the movable contact and the fixed contact occurs. The present invention relates to a locking device for a drawer-type electric appliance, in which the movable frame is locked to the fixed frame in a closed position and a predetermined mutually opened position. In this type of locking device, when the movable frame moves between a mutually closed position of the predetermined contacts in the fixed frame and a mutually open position of the predetermined contacts, the predetermined contact The locking device between the movable frame and the fixed frame, which is once released due to the movement of the movable frame in the mutually closed position or the open position, is automatically returned by a simple means to lock the locking device again. It is desirable to be able to lock the movable frame and the fixed frame.

[Prior art and its problems]

Generally, this type of drawer-type electrical equipment is the 10th.
As illustrated in FIGS. 24 to 24, there are movable frame side guides 6 for movement provided on both outer surfaces of the movable frame 4 to which the drawer-type electrical equipment 1 is fixed, and correspondingly on both sides of the fixed frame 5. By storing the movable frame 4 in the fixed frame 5 by combining it with a similar fixed frame side guide 7 provided on the inner surface so as to slide with each other,
A pair of movable side contacts 2 provided on the back surface of the circuit breaker 1 and a corresponding pair of fixed side contacts 3 provided on the fixed frame 5 are closed, and the electrical equipment 1 is closed.
An individual test of the electrical equipment 1 in which the movable side contact 2 is separated from the fixed side contact 3 by pulling out the movable frame 4 from the fixed frame 5, or by pulling out the movable frame 4 from the fixed frame 5. It is generally known that the movable frame 4 occupies one of the predetermined mutually separated positions of the contacts, which are in a non-operating state where the contactors are in a non-operating state. At this time, in this type of drawer-type electrical equipment 1, as illustrated in FIGS. 16B and 16C, the lower sides of the movable frame side guide 6 and the fixed frame side guide 7 are bent in the horizontal direction so as to contact each other. The former has two cutout parts 8a and 8.
b, and one elongated hole 9 is formed in the latter,
When the predetermined contacts of the circuit breaker 1 are in the mutually closed position, the cutout portion 8b and the elongated hole 9 occupy the same position (FIG. 16). In the separated position, the notch 8a and the elongated hole 9 occupy the same position, and as illustrated in FIG. Locking piece 11 at the upper end of the locking plate 10 that is rotatably supported
is passed through the notch 8b of the movable frame side guide 6 occupying the same position and the elongated hole 9 of the fixed frame side guide 7, or through the notch 8a of the guide 6.
and the elongated hole 9 of the guide 7 as shown in FIG. Locking is performed at mutually separated positions.

Furthermore, in the conventional drawer-type electric device 1, the movable frame 4 is moved from the mutually closed position of the predetermined contacts in the fixed frame 5 to the mutually open position of the predetermined contacts, or in the opposite direction. In order to do so, it is first necessary to release the locks at each of the aforementioned positions. In that case, as illustrated in FIGS. 19 and 20, the free end 10a of the locking plate 10
By manually pushing down the locking plate 1
0 is pulled down against the tensile force of the return spring 33 whose one end is locked to the fixed frame side guide body 7, and the predetermined contacts are placed in the mutually closed position (FIG. 17) or the predetermined contacts are placed in the mutually closed position (FIG. 17). In the open position (Fig. 18), as shown in Fig. 16C, the movable frame side guide 6
The locking piece 1 of the locking plate 10 was used to restrain the notch 8b or 8a on the lower side and the elongated hole 9 on the lower side of the fixed frame side guide 7 in a locked state, respectively.
1 is released from the notch portion 8b or 8a and the long notch 9, and the movable frame 4 is released from the locked state between it and the fixed frame 5. Thereafter, for example, in order to move the movable frame 4 from the mutually closed position of the predetermined contacts on the fixed frame 5 to the mutually open position of the predetermined contacts, the fixed frame 4 is moved as illustrated in FIG.
An operation handle 20, such as a gear-adding handle, is attached to the hexagonal protrusion 19 in the center of the gear 18 supported on the side surface of the gear 18, and the gear 18 is rotated clockwise to rotate the gear 18 along with the cam 28 around the cam support shaft 21. The cam gear 23 fixed to the movable frame 4 and meshing with the gear 18 is rotated counterclockwise, and the roller 24 (FIGS. 12 and 13) of the roller support shaft 25 fixed to the movable frame side guide 6 of the movable frame 4 is rotated counterclockwise. Cam gear 2
3 and the inside of the roller guide groove 27 of the cam 28 are rolled outward, so that the roller support shaft 2
5 may be moved outward in the direction of the arrow shown in the figure within a horizontal roller shaft guide groove 26 provided in the fixed frame side guide 7 of the fixed frame 5.

Next, in order to move the movable frame 4 from the predetermined mutually separated position of the contacts on the fixed frame 5 to the predetermined mutually closed position of the contacts, as illustrated in FIG. 18 counterclockwise, the cam gear 23 is rotated clockwise, and the roller 24 is rolled inward in the roller guide groove 27, thereby moving the roller support shaft 25 into the roller support shaft guide groove. What is necessary is to move the inside of the holder inward in the direction of the arrow shown in the figure.

In this case, in the conventional locking device for a drawer-type circuit breaker, the movable frame 4 is moved from the mutually open position of the predetermined contacts in the fixed frame 5 to the mutually closed position of the predetermined contacts, or vice versa. Fixed frame 5 of movable frame 4 at each position when moved to
When the movable frame 4 moves from the predetermined mutually open position of the contacts in the fixed frame 5 to the predetermined mutually closed position of the contacts, the locking for the 15th
The cam 28 shown in the figure is rotated clockwise around the cam support shaft 21 by the operation handle 20 as illustrated in FIG. 24, and the roller support shaft is fixed to the movable frame side guide 6 of the movable frame 4. 25 rollers 24
The movable frame is moved by rolling the cam gear 23 and the cam 28 inward in the roller guide grooves 27 (FIG. 13), and the locking piece 11 of the locking plate 10 is moved inward from the roller guide groove 27 of the cam gear 23 and the cam 28. When the notch 8b on the lower side and the elongated hole 9 on the lower side of the fixed frame side guide 7 match, they protrude and lock through both, and are automatically locked at the mutually closed position of the predetermined contacts. It will be done.

Conversely, when the movable frame 4 moves from the predetermined mutually closed position of the contacts on the fixed frame 5 to the predetermined mutually separated position of the contacts, the cam 28 shown in FIG. 15 is moved as shown in FIG. 23. The roller 24 (13
The movable frame is moved by rolling the cam gear 23 and the inside of the roller guide groove 27 of the cam 28 toward the outside, and the locking piece 11 of the locking plate 10 is cut into the lower side of the movable frame side guide 6. When the notch 8a and the elongated hole 9 on the lower side of the fixed frame side guide 7 match, they protrude and lock through both, and locking is automatically performed at the predetermined mutually separated position of the contacts. .

As explained above, in the conventional locking device for a drawer-type electric device, the predetermined contacts of the movable frame 4 to which the electric device 1 is fixed and the fixed frame 5 that houses the movable frame 4 are closed. When the movable frame 4 is moved from one position to the other in either the open position or the open position, the locking is always performed automatically. However, if the movable frame 4 is moved 19 and 20, the free end 10a of the locking plate 10 is pushed downward with one hand in order to release the lock at each position in the closed position or the open position. Attach the operating handle 20 to the hexagonal protrusion 19 of the gear 18 with the other hand while pressing down and holding it.
Gear 1 as illustrated in FIG. 23 or 24
The movable frame 4 is moved by rotating the cam gear 10 and the cam 11, and the notch 8a or 8b on the lower side of the movable frame side guide body 6 of the movable frame 4 fixes the fixed frame 5. The locking piece 11 of the locking plate 10 that passes through and locks both of the frame-side guide body 7 is removed from the position where it engages with the elongated hole 9 on the lower side of the frame-side guide body 7, and as illustrated in FIGS. Since it is necessary to continue pressing down the free end 10a of the locking plate 10 by hand until the movement of the locking plate 10 is no longer obstructed, the operation is extremely complicated.

[Purpose of invention]

By storing or pulling out the movable frame to which the electrical equipment is fixed into the fixed frame via mutual guide means, the movable contact of the electrical equipment and the fixed contact of the fixed frame are closed or separated. In order to solve the above-mentioned drawbacks of the conventional locking device for drawer-type electrical equipment, the movable frame and the fixed frame are locked in the closed position or the open position of both contacts. In view of this, the present invention provides a method for moving the movable frame relative to the fixed frame by a simple means, by manually releasing the lock between the predetermined contacts in either the closed position or the open position. A drawer type that does not require effort, wherein the means is automatically held in the unlocked position, and when the movable frame moves from one of the positions to the other position with respect to the fixed frame, the lock is automatically relocked. The purpose is to provide a locking device for electrical equipment.

[Key points of the idea]

In order to achieve the above object, the present invention provides the above-mentioned locking device, which includes a cam gear whose both ends are rotatably supported by the pair of said fixed frame side movement guide means, and which has a cam at each end and a tooth profile formed on the periphery thereof. and an operating handle coupled to the cam gear via a gear having teeth that mesh with the tooth profile thereof and for rotating the cam shaft via the cam gear by a rotational operation, the fixed frame side movement guide means The moving shaft of the movable frame side moving guide means, which is movably guided and supported in the moving guide groove, moves in the moving guide groove in conjunction with the rotation of the camshaft. A locking piece is linked to a cam and a cam gear, and locks the movable frame by protruding a locking piece from the fixed frame side movement guide means side to the movable frame side movement guide means at predetermined closed and opened positions of the contacts. A locking means consisting of a locking plate that is swingably supported so as to rotate and a spring that always biases the locking plate toward the locking side; A locking lever is provided, and an end of the locking plate opposite to the locking piece and an end of the locking lever opposite to the operating end are bendably connected via a connecting link therebetween, When the operating end of the locking lever is pushed down, the locking plate is driven in the unlocking direction and the locking lever is placed in a position where the locking plate is held in the unlocked state. The locking means is configured such that the locking plate is pressed and rotated in the locking direction by the cam when the locking plate reaches the position corresponding to the opening position and the release position, so that the locking means is released by manual operation. , the movable frame is automatically returned to the locked state when it is moved to the required position.

[Example of idea]

Next, the present invention will be explained in detail based on the embodiments shown in the drawings.

In the drawer-type electrical equipment equipped with the locking device related to the present invention, FIGS. 2 to 5 and 12,
As illustrated in FIG. 13, there are movable frame side guide bodies 6 for movement provided on both outer surfaces of the movable frame 4 to which the electrical equipment 1 is fixed, and correspondingly on both inner surfaces of the fixed frame 5. The movable frame 4 is assembled with a similar fixed frame side guide body 7 provided on the movable frame 4 so as to be able to slide together
By storing the circuit breaker 1 in the fixed frame 5,
A pair of movable side contacts 2 provided on the back surface of a fixed frame 5 and a corresponding pair of fixed side contacts 3 provided on a fixed frame 5 are closed to enable the circuit breaker 1 to operate. Mutual closed position or movable frame 4
The movable side contact 2 is separated from the fixed side contact 3 by pulling it out from the fixed frame 5, and the contacts are at a predetermined mutually separated position in a non-operating state such that an independent test of the circuit breaker can be performed. Move any of the movable frame 4
As already explained in detail about the electrical equipment 1 which is provided with a conventional locking device, the lower side of the fixed frame side guide body 7 provided on both inner surfaces of the fixed frame 5 and the movable The lower sides of the movable frame-side guide bodies 6 provided on both outer surfaces of the frame 4 are aligned with each other in accordance with the closed and opened positions of the predetermined contacts, as shown in FIG. Notches 8a and 8b and an elongated hole 9 are formed in such a manner that the notches 8a and 8b and an elongated hole 9 are formed in such a manner that the notches 8a and the elongated hole 9 are formed in the predetermined mutually open position of the contacts, and in the closed position as described above. A locking plate 10 having a locking piece 11 that penetrates and locks the notch 8b and the elongated hole 9 allows the movable frame 4 to automatically connect to the fixed frame 5 when the contacts are in the mutually closed or separated position. The locking mechanism (FIGS. 17 and 18) is similar to that of conventional locking devices for drawer-type electrical equipment.

However, in the locking device according to the present invention, as illustrated in FIG. A locking lever 1 in which a link 13 movably connected via a pin 14 is similarly movably supported in a proper position on a fixed frame via a long hole 13a formed at the other end and a pin 17.
It is connected to one end of 6. In that case, when moving the movable frame 4 with respect to the fixed frame 5 from the mutually closed position of the predetermined contacts to the open position, or vice versa, as illustrated in FIGS. 8 and 9, By pushing down the free end 16a of the locking lever 16, the locking piece 1 of the locking plate 10 is released via the link 13.
1 to the notch 8b on the lower side of the movable frame side movable guide 6 and the elongated hole 9 on the lower side of the fixed frame side movable guide 7 or the notch on the lower side of the movable guide 6 against the tensile force of the spring 33. The lock plate 10 can be released from the lock between the portion 8a and the elongated hole 9 to release the lock between the movable frame side movement guide 6 and the fixed frame side movement guide 7. As shown in FIGS. 8 and 9, a connecting pin 14 between the locking plate 10 and the link 13, and a connecting pin 1 between the link 13 and the locking lever 16.
7 and the support shaft 15 of the locking lever 16 are pushed down to a position where they are aligned in a straight line, whereby the link 13 and the locking lever 16 are placed in a locked state,
As a result, the locking plate 10 is automatically held in this position.

Thereafter, as illustrated in FIG. 23 or 24, a toothed handle 20 is attached to the hexagonal protrusion 19 of the shaft of the gear 18.
Attach the gear and turn the gear 18 clockwise (Fig. 23).
Alternatively, by rotating the cam gear 23 counterclockwise (FIG. 24) and rotating the cam gear 23 counterclockwise or clockwise about the cam support shaft 21, the roller support shaft 25 fixed to the movable frame 4 can be rotated to the fixed frame. 5
The movable frame 4 moves outward or inward inside the roller support shaft guide groove 26, and the movable frame 4 moves from the predetermined contact mutually closed position relative to the fixed frame to the predetermined contact open position, Or move in the opposite direction.

In this case, in the locking device according to the present invention, a cam 28 symmetrically fixed to the shaft end of the roller support shaft 25 opposite to the shaft end where the cam gear 10 is provided is shown in FIG. 8 or 9. As the lock lever 16 rotates clockwise or counterclockwise, the projection 32 formed at the lower end of the cam 28 pushes down the upper projection 30 of the locking lever 16, so that it is automatically held in the unlocked position. The locking plate 10 that had been held up is pushed up by the reversal of the link 13 and rotates counterclockwise about its support shaft 12 due to the tensile force of the tension spring 33, and the locking piece 11 is moved to the movable frame side movement guide 6. When the cutout 8a or 8b on the lower side matches the elongated hole 9 on the lower side of the fixed frame movable guide 7, that is, when the movable frame 4 reaches the predetermined mutually separating position or closing position of the contacts. The movable frame 4 is locked to the fixed frame 5 at each position by automatically locking the notch 8a and the elongated hole 9 or the notch 8b and the elongated hole 9. It will be like that.

As mentioned above, in the locking device for a drawer-type electric device according to the present invention, a locking lever is movably supported on a fixed frame 5 via a link 13 movably held at one end of a locking plate 10. 16, when the free end 16a of the locking lever 16 is pushed down, the link 13 is reversed and the locking plate 10 is pulled down to release the lock and is automatically held in the unlocked position. Next, the cam gear 23 is used to move the movable frame 4 from the closed position to the opened position of the predetermined contacts, or vice versa.
When the cam 28 is rotated, one end of the cam 28 presses the locking lever 16 as the cam 28 rotates, so that the link 13 is reversed again and the locking plate 10 is automatically moved from the unlocked position. When the movable frame 4 rises and reaches the predetermined mutually closed position or open position of the contacts, locking is automatically performed.
It is not necessary to manually restrain the locking plate 10 to the unlocked position at the beginning of movement.

[Effect of idea]

As explained above, in the present invention, the movable frame is connected to the fixed frame through mutual movement guide means provided on both the movable frame to which the electrical equipment is fixed and the fixed frame in which the movable frame is housed. By being stored or pulled out, the movable contact provided on the electrical device and the fixed contact provided on the fixed frame close or open with each other, and at this time, the movable contact and the fixed In a locking device for a drawer-type electric device, the movable frame is locked to the fixed frame in a predetermined mutually closed position and a predetermined mutually opened position with a side contact, A camshaft is rotatably supported at both ends by the fixed frame side movement guide means and has a cam at each end and a cam gear having a tooth profile on its periphery, and the cam shaft is connected to the cam gear via a gear having teeth that mesh with the tooth profile. An operation handle is provided for rotating the camshaft via the cam gear by a rotation operation, and movement of the movable frame side movement guide means movably guided and supported in the movement guide groove of the fixed frame side movement guide means. The moving shaft is linked to the cam and the cam gear so that the moving shaft moves in the movement guide groove in conjunction with the rotation of the cam shaft, and the contacts are fixed at predetermined closing and opening positions. A locking plate is swingably supported so as to lock the movable frame by protruding a locking piece from the frame side movement guide means side to the movable frame side movement guide means, and this locking plate is always locked. A locking means consisting of a spring biased toward the side and a locking lever rotatably supported in the middle and having one end as an operating end are provided, and an end opposite to the locking piece of the locking plate is provided. The operating end of the locking lever and the opposite end are bendably connected via a connecting link therebetween, and the locking plate is driven in the direction of unlocking by pushing down the operating end of the locking lever. When the movable frame reaches a position corresponding to a predetermined closing position and opening position of the contact, the locking lever is placed in a position where the locking lever is kept in the unlocked state, and the locking plate is locked by the cam. locking means at the current position that is manually performed in advance when moving the movable frame from the mutually closed position of the predetermined contacts to the open position, or vice versa, by being configured to be pressed and rotated in the direction; is automatically held unlocked,
and when the movable frame moves and releases, the locking means automatically rotates from the unlocked position,
Since the movable frame can be automatically locked again at the intended mutually opening or closing position of the predetermined contacts, the locking means can be held down by hand, even if only temporarily. This has the effect of simplifying the operation and increasing reliability.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view illustrating the structure of a locking means and its driving means of a locking device for a drawer-type electric appliance related to the present invention, and FIGS. 2 and 3 are a schematic side view of a drawer equipped with the locking device. A schematic side view and a schematic front view illustrating the relationship between a movable frame to which a shaped electrical device is fixed and a fixed frame in which the movable frame is housed, and FIGS. 4 and 5 are schematic side views of the fixed frame. and a schematic front view.
9 to 9 are schematic side views for explaining the structure and operation of the locking device, and FIG. 10 and 1
FIG. 1 shows a schematic side view and a schematic front view illustrating the relationship between a fixed movable frame of a drawer-type electric device equipped with a conventional locking device and a fixed frame that houses the movable frame.
12 and 13 show a schematic side view and a front view of the movable frame, FIGS. 14 and 15 show a schematic side view and a front view of the fixed frame, and FIG. 16 shows a drawer-type frame. Schematic diagrams illustrating the relationship between the notch formed on the lower side of the movable frame side movement guide means and the elongated hole formed on the lower side of the fixed frame side movement guide means of electric equipment in general are shown in Figs. The figure represents a schematic side view illustrating the configuration and operation of a conventional locking device. 1...Electrical equipment, 2...Movable side contactor, 3...
Fixed side contactor, 4...Movable frame, 5...Fixed frame, 6
...Movable frame side moving guide, 7...Fixed frame side moving guide, 8a, 8b...Notch on the lower side of the movable frame side moving guide, 9...Elongated hole on the lower side of the fixed frame side moving guide , 10... Locking plate, 11... Locking piece, 12...
... Locking plate support shaft, 13 ... Link, 16 ... Lock lever, 23 ... Cam gear, 25 ... Roller support shaft, 26 ... Roller support shaft guide groove, 28 ... Cam.

Claims (1)

[Claims for Utility Model Registration] The movable frame is housed in the fixed frame through mutual movement guide means provided on both the movable frame to which the electrical equipment is fixed and the fixed frame in which the movable frame is housed. By being moved or pulled out, the movable contact provided on the electrical equipment and the fixed contact provided on the fixed frame close or separate from each other, and at this time, the movable contact and the fixed A locking device for a drawer-type electrical device, wherein the movable frame is locked to the fixed frame in a predetermined mutually closed position with a side contactor and a predetermined open position, wherein a pair of the fixed frames a camshaft rotatably supported at both ends by the side movement guide means and having cams at both ends and cam gears having tooth shapes on the periphery;
An operation handle is connected to the cam gear via a gear having teeth that mesh with the tooth profile thereof, and rotates the camshaft via the cam gear by a rotation operation, and the operation handle is provided in the movement guide groove of the fixed frame side movement guide means. The moving shaft is linked to the cam and the cam gear so that the moving shaft of the movable frame side moving guide means that is movably guided and supported moves in the moving guide groove in conjunction with rotation of the cam shaft. , is swingable so as to lock the movable frame by protruding a locking piece from the fixed frame side movement guide means side to the movable frame side movement guide means side at predetermined close and open positions of the contacts. A locking means consisting of a locking plate supported by a locking plate and a spring that always urges the locking plate toward the locking side, and a locking lever rotatably supported in the middle and having one end as an operating end are provided. , an end of the locking plate opposite to the locking piece and an end of the locking lever opposite to the operating end are bendably connected via a connecting link therebetween, and the locking lever is operated. The locking lever is placed in a position where the locking plate is driven in the direction of unlocking by pressing down on the end and maintained in the unlocked state.
The drawer type is characterized in that when the movable frame reaches a position corresponding to a predetermined closing position and opening position of the contact, the cam presses and rotates the locking plate in the locking direction. Locking device for electrical equipment.